CN103302640A - Multifunctional machine - Google Patents

Abstract

The invention discloses a multifunctional machine, which comprises an output shaft for mounting a working head and outputting rotary oscillation, and a fastener for arranging the working head on the output shaft. The multifunctional machine also comprises an adaptor, wherein the adaptor is provided with a shape matching part for transmitting the torque on the output shaft to the working head and an adapting part matched with the working head; and the adapting part at least comprises a first adapting part and a second adapting part, so that at least two types of working heads can be quickly and accurately arranged on the output shaft at specific angles through the adaptor.

Description

Multifunctional machine

Technical Field

The invention relates to a multifunctional machine.

Background

The multifunctional machine is a common handheld swing power tool in the industry, and the working principle of the multifunctional machine is that an output shaft performs rotary swing motion around the axis of the output shaft, so that an accessory working head arranged at the tail end of the output shaft is driven to perform swing motion. Common accessory working heads include straight saw blades, circular saw blades, triangular sanding discs, shovel type scrapers, and the like. Therefore, after different accessory working heads are installed on the output shaft, a user can realize various different operation functions, such as sawing, cutting, grinding, scraping and the like, so as to adapt to different working requirements.

Disclosure of Invention

The technical problems to be solved by the invention are as follows: a multi-function machine having an adapter for mounting different types of work heads at a specific angle on an output shaft is provided.

The technical scheme adopted by the invention for solving the technical problems is as follows: a multifunctional machine comprises an output shaft and a fastener, wherein the output shaft is used for mounting a working head and outputting rotary swing, the fastener is used for mounting the working head on the output shaft, the output shaft is provided with a matching surface which is contacted with the surface of the working head, the multifunctional machine also comprises an adapter, the adapter is provided with a shape matching part and a switching part, the shape matching part is used for transmitting torque on the output shaft to the working head, the switching part is matched and connected with the working head, and the switching part at least comprises a first switching part and a second switching part so as to be connected with at least two working heads with connecting holes of different shapes; the multifunctional machine further comprises an elastic element which urges the adaptor to move axially towards the direction of connection with the working head.

Compared with the prior art, the invention has the beneficial effects that: the adapter is provided with a shape matching part for transmitting the torque on the output shaft to the working head and an adapter part matched with the working head, and the shape matching part is matched with the output shaft or the pressing plate, so that the torque transmission is further enhanced; the switching part at least comprises a first switching part and a second switching part so as to connect at least two working heads with connecting holes of different shapes. So that the adaptor can mount at least two different types of working heads on the output shaft quickly, accurately and at a specific angle. And in the process of mounting the working head, the working head cannot move randomly along with the fastening piece.

Preferably, the output shaft is provided with a matching part matched with the shape matching part, and the elastic element is arranged between the output shaft and the adapter.

Preferably, a stop member for stopping the axial disengagement of the adapter is arranged on the output shaft.

Preferably, the fastener comprises a pressing plate which is in contact with the working head, a matching part which is matched with the shape matching part is arranged on the pressing plate, and the elastic element is arranged between the pressing plate and the adapter.

Preferably, the fastening member is provided with a stop ring for stopping the axial disengagement of the adapter.

Preferably, the adapter includes a disc-shaped main body, the shape matching portion is formed by radially extending the outer circumference of the disc-shaped main body outwards, and the first adapting portion and the second adapting portion are formed by axially protruding from one side of the disc-shaped main body.

Preferably, the form-fitting portion comprises at least two form-fitting elements extending radially outwards from the outer circumference of the disc-shaped body.

Preferably, a projection of an outer contour of the disc-shaped body on a plane perpendicular to the output shaft is a polygon.

Preferably, the adapter part at least comprises a first adapter part and a second adapter part which are matched with the connecting holes with different shapes in a shape.

Preferably, the second adapter portion is axially arranged on one side of the first adapter portion, and the radial dimensions of the first adapter portion and the second adapter portion are different.

Preferably, the projection shapes of the first transfer part and the second transfer part on a plane perpendicular to the output shaft are different.

Preferably, at least one of the first transfer part and the second transfer part has an outer contour which is a conical surface or a cylindrical surface.

Preferably, the projection of the outer contour of the first transfer part on a plane perpendicular to the output shaft is a regular polygon, and the second transfer part comprises at least two protrusions extending axially from the first transfer part.

Preferably, the adapter further includes a third adapter portion axially disposed with the first adapter portion and the second adapter portion, and a radial dimension of the third adapter portion is smaller than a radial dimension of the first adapter portion or the second adapter portion.

Preferably, the outer contour of the third adapter part is a conical surface or a cylindrical surface.

Drawings

Fig. 1 is a schematic view of a multi-function machine in a first embodiment of the present invention, with a partial housing removed from a head region.

Fig. 2 is an exploded isometric view of the multi-function nosepiece area of fig. 1.

Fig. 3 is a perspective view of an adapter according to a first embodiment of the present invention.

Fig. 4 is a front view of the adapter in the first embodiment of the present invention.

Fig. 5 is a plan view of the adapter in the first embodiment of the present invention.

Fig. 6 is a schematic view of the adapter of fig. 3 mated with a work head.

Fig. 7 is a schematic cross-sectional view of the multi-function head area of fig. 1, with the working head locked to the output shaft.

FIG. 8 is an exploded perspective view of the multi-function machine of FIG. 1 mounted with a second work head.

Fig. 9 is a schematic view of the adapter of fig. 3 mated with a second work head.

Fig. 10 is a schematic cross-sectional view of the multi-function head area of fig. 8 with a second working head locked to the output shaft.

Fig. 11 is an exploded perspective view of the multi-function machine of fig. 1 mounted with a third working head.

Fig. 12 is a schematic cross-sectional view of the multi-function head area of fig. 11, with a third working head locked to the output shaft.

Fig. 13 is an exploded perspective view of a head region of a multi-function machine in a second embodiment of the present invention.

Fig. 14 is an exploded perspective view of the head region of the multi-function machine in a second embodiment of the invention, with the adapter and fastener installed together.

Fig. 15 is a schematic cross-sectional view of the multi-function head area of fig. 13, with the first work head locked to the output shaft.

Fig. 16 is a schematic sectional view of a head region of a multi-function machine in a third embodiment of the present invention, when a first working head is not mounted on an output shaft.

Fig. 17 is a schematic sectional view of a head region of a multi-function machine in a third embodiment of the present invention, when a first working head is mounted on an output shaft.

Wherein,

32.output shaft 34, workinghead 36, fastener

38. Shiftingfork 42,pressure plate 44 and rod part

46. Connectingpart 48, threadedpart 52, mounting part

54. Cuttingpart 56, connectinghole 58, connecting flange

60.Mating surface 62.adapter 63. conical spring

64. Centrehole 65,rand 66, switching dish

67. Clampinggroove 68, disc-shapedmain body 70, shape matching part

72.First transition 73,side wall 74, second transition

76. Formfitting element 75,end wall 77, recess

78.Recess 79,step 80, locking member

81.Third adapter 82,drive mechanism 84, through-hole

86. Pushrod 88, operatingpiece 90, pivot

92.Groove 94,cam portion 96, handle

98.Contact surface 100, another workinghead 101, round table

102.Bump 103,top surface 104, mounting portion

106. Cuttingpart 108, connectinghole 110 and projection

112.Curve section 114, another workinghead 116, mounting section

118. Cuttingpart 120, connectinghole 122 and clamping ring

124. Recess 126, blind threaded hole 128, fastener

130. Pressing plate 132. screw thread part

Detailed Description

The invention is further described with reference to the following detailed description and accompanying drawings.

Fig. 1 shows a head region in a first embodiment of the multi-function machine of the present invention. The multifunctional machine includes ahousing 30, a motor (not shown) mounted in thehousing 30, anoutput shaft 32 driven by the motor, and a workinghead 34 mounted below theoutput shaft 32. Afastener 36 is connected to the end of theoutput shaft 32 after passing through the workinghead 34, so that the workinghead 34 is fixed on theoutput shaft 32 and can move under the driving of theoutput shaft 32.

Theoutput shaft 32 is longitudinally disposed within thehousing 30 with its distal end extending a distance beyond thehousing 32. A shiftingfork 38 is mounted on theoutput shaft 32, and when the motor rotates, an eccentric transmission mechanism (not shown) is driven to rotate, and the eccentric transmission mechanism further drives the shiftingfork 38 to realize rotary swing, so that theoutput shaft 32 performs rotary swing motion. The eccentric transmission mechanism is a common structure applied to a multifunctional machine in the industry, and is not described in detail herein.

Referring to fig. 1 and 2, thefastener 36 includes anannular pressure plate 42 and ashank 44 extending axially from a central portion of thepressure plate 42. In this embodiment, thestem portion 44 includes a connectingportion 46 connected to thepressure plate 42 and a threadedportion 48 connected thereto.

The workinghead 34 is a straight saw blade, and it will be readily apparent to those skilled in the art that the workinghead 34 may be other accessories, such as a circular saw blade, a sanding disc, a scraper, etc. The workinghead 34 is made of metal and includes a mountingportion 52 and a cuttingportion 54 bent and extended from the mountingportion 52, the mountingportion 52 is provided with a connectinghole 56 for thefastening member 36 to pass through, and the connectinghole 56 is regular dodecagon. Of course, theconnection hole 56 may have any shape such as other regular polygon, or circle.

The end of theoutput shaft 32 is provided with a connectingflange 58. Theattachment flange 58 is provided with amating surface 60 that contacts the upper surface of the workinghead 34. When the workinghead 34 is fixed on theoutput shaft 32, the upper and lower surfaces of the workinghead 34 are respectively attached between thepressing plate 42 and themating surface 60. Here, the friction force generated by theengagement surface 60 and the upper surface of the workinghead 34 is large enough to transmit the swing torque of theoutput shaft 32 to the workinghead 34 without causing the workinghead 34 to slip during the operation of the multifunctional machine. And theattachment hole 44 of the workinghead 34 may have any other shape regardless of the shape of the attachment hole itself of the workinghead 34 since it is closely fitted to the upper surface of the mountingportion 52 of the workinghead 34 through theengagement surface 60. Therefore, by providing theoutput shaft 32 with thefitting surface 60, the multifunctional machine can be connected with different types of working heads, and the versatility and convenience of the multifunctional machine are greatly improved.

In the present embodiment, themating surface 60 is a friction surface formed by a plurality of regularly arranged ribs. Of course, the matching surface can also be in other shapes, such as a smooth surface, or formed by a plurality of mandrels which are regularly arranged, or a coating layer containing a friction material; or directly grinding the rough friction surface.

The multi-function machine is enabled to connect different types of working heads by themating surface 60 on theoutput shaft 32, and the working heads can be mounted on theoutput shaft 32 at any angle. However, it also brings troubles such as the inability to quickly and accurately adjust the angle of the various working heads with respect to theoutput shaft 32 at the time of installation.

Thus, referring to FIG. 2, the multi-function machine further includes anadapter 62, theadapter 62 being capable of mounting different types of work heads on theoutput shaft 32 quickly, accurately and at a specific angle. In the embodiment, theadaptor 62 is disposed on theoutput shaft 32 and can transmit the torque on theoutput shaft 32 to the workinghead 34, so as to further enhance the transmission of the torque and prevent the workinghead 34 from slipping. Between theoutput shaft 32 and theadapter 62, there is provided an elastic member whose elastic force urges theadapter 62 to axially move always in a direction of contacting the workinghead 34. Here, the elastic member is aconical spring 63, and theconical spring 63 occupies a relatively small space when compressed. It will be appreciated that the resilient member may also be a compression spring or the like. A stopper for stopping the release of theadapter 62 is provided on theoutput shaft 32. Here, the stopper is acollar 65 having an opening, and a catchinggroove 67 is provided on theoutput shaft 32. Theretainer ring 65 is received in thepocket 67 to prevent thestop adapter 62 from disengaging theoutput shaft 32 when the workinghead 34 is not installed.

Referring to fig. 2-5,adapter 62 has acentral bore 64 through whichfastener 36 passes and anadapter plate 66. In this embodiment, thecentral bore 64 is generally square in cross-section and mates with the connectingportion 46. Theadaptor disc 66 is provided with a first end portion facing theoutput shaft 32 and having a disc-shapedbody 68 and a second end portion facing the workinghead 34, which are oppositely disposed.

In order to better transmit the torque and mount the workinghead 34 on theoutput shaft 32 at a specific angle, theadapter 62 includes a shape-matchingportion 70 and an adapter portion matching with the workinghead 34. The adapter part at least comprises afirst adapter part 72 and asecond adapter part 74, and the projection shapes of thefirst adapter part 72 and thesecond adapter part 74 on a plane perpendicular to theoutput shaft 32 are different, so that the adapter part is used for connecting at least two working heads with connecting holes of different shapes. Moreover, the thickness of the two adapter parts is more than 1.2 mm, preferably 1.2 mm, so that the corresponding working heads can be more stably installed.

The shapedportion 70 is formed by extending the outer circumference of the disc-shapedbody 68 radially outward, and thefirst transition portion 72 and thesecond transition portion 74 are formed by projecting axially from one side of the disc-shapedbody 68.

The form fitting 70 includes at least oneform fitting element 76 extending radially outwardly from the outer circumference of the disc-shapedbody 68. In the present embodiment, the shaped fitting 70 comprises four circumferentially uniformly arranged shapedfitting elements 76, and each shapedfitting element 76 comprises two oppositeparallel side walls 73 with respect to the center of the disc-shapedbody 68 and anend wall 75 connecting theside walls 73. Preferably, theend walls 75 are perpendicular to theside walls 73. And for the convenience of assembly, the twoside walls 73 of the form-fittingelement 76 are in rounded transition with the outer circumference of the disc-shapedbody 68; the twoside walls 73 and theend wall 75 of the form-fittingelement 76 also merge by means of rounded corners. Theoutput shaft 32 is provided with arecess 77 for at least partially receiving theadapter 62, and an engaging portion having a shape matching the shape of the engagingmember 76 is formed on an inner wall of therecess 77. In a particular embodiment, the outer profile of the mating portion is the same shape as the outer profile of theform fitting portion 70. The mating portion includes agroove 78 that mates with theform fitting element 76. Obviously, the outer contour of the form-fittingelement 76 may also have other shapes, and may at least comprise an arc or a polygon, etc.

Of course, when the projection of the outer contour of the disk-shapedbody 68 on a plane perpendicular to theoutput shaft 32 is a polygon, such as a regular dodecagon, the fitting is directly formed on the disk-shapedbody 68. In this way, a fitting portion matching the outer contour of the disc-shapedbody 68 is also formed at the inner wall of therecess 77. Obviously, the outer contour shape of the disk-shapedbody 68 may also be other shapes, such as polygonal, etc.

In this embodiment, theadapter 62 is stepped, extending axially from the surface of the disc-shaped body 68 astep 79, thestep 79 being a cylindrical step having a radial dimension smaller than that of the disc-shapedbody 68. Thestep 79 is thicker than thecollar 65 and thecollar 65 sits on the cylindrical surface of thestep 79 and contacts the surface of the disc-like body 68 when theadaptor 62 is mounted on theoutput shaft 32.

Thefirst adapter portion 72 and thesecond adapter portion 74 are formed by axially protruding from the end surface of thestep 79 in sequence. And the maximum radial dimension of thefirst transition portion 72 may be equal to or greater than the maximum radial dimension of thesecond transition portion 74.

The transition portion further comprises athird transition portion 81 arranged axially with respect to thefirst transition portion 72 and thesecond transition portion 74. Thethird transition portion 81 extends axially from thesecond transition portion 74 and has a maximum radial dimension that is less than the maximum radial dimension of thesecond transition portion 74.

As shown in fig. 2, 5 and 6, in the present embodiment, the cross section of thefirst transfer portion 72 on the plane perpendicular to theoutput shaft 32 is a regular hexagon and is matched with theconnection hole 56 of the workinghead 34. When the workinghead 34 is mounted to theadapter 62, the attachment holes 56 are received and mated with thefirst adapter portion 72 of theadapter 62 to radially position the workinghead 34. In this way, theadapter 62 can transmit the torque on theoutput shaft 32 to the workinghead 34 and also fix the angle of the workinghead 34 relative to theoutput shaft 32. Obviously, the cross-section of thefirst connection portion 72 may also have other shapes, such as a dodecagon shape matching the dodecagon-shaped workinghead 34. Of course, thefirst transition portion 72 has a regular hexagonal cross-section, which allows six fixed positions of the workinghead 34 relative to theoutput shaft 32.

Further, in this embodiment, in order to allow quick mounting or dismounting of the working head and to provide a stronger axial pressing force, the multifunctional machine is provided with a lockingmember 80 cooperating with thefastening member 36 and adriving mechanism 82 rotatable about the axis X of theoutput shaft 32, see fig. 7. The lockingmember 80 and thefastener 36 can be driven to be threadedly locked when thedriving mechanism 82 is rotated in one direction; thedrive mechanism 82 is then rotated in the opposite direction to drive thelock 80 andfastener 36 to release. Of course, thefastener 36 may also be directly threadedly coupled to theoutput shaft 32 to secure the workinghead 34 to theoutput shaft 32, as will be described in detail in later embodiments.

The retainingmember 80 is received in the cavity of theoutput shaft 32. The lockingmember 80 is substantially annular and can rotate freely in the cavity without axial displacement, and a threaded hole connected with the threaded portion of thefastening member 36 is axially formed in the middle of the locking member. Thecoupling portion 46 of thefastener 36 is generally square in cross-section and theoutput shaft 32 is provided with a throughhole 84 that receives thecoupling portion 46. The throughbore 84 is also generally square in cross-section such that thefastener 36 cannot rotate relative to theoutput shaft 32 when thecoupling portion 46 is disposed through the throughbore 84.

Thedriving mechanism 82 includes apush rod 86 for engaging thelock member 80 and driving thelock member 80 to rotate, and an operatingmember 88 for operating the movement of thepush rod 86. Thepush rod 86 has apivot 90 mounted at the top and arecess 92 axially formed at the bottom. Wherein the axis of thepivot 90 is perpendicular to the axis X of theoutput shaft 32. Thegroove 92 is fitted over the outer circumference of the lockingmember 80 and drives the lockingmember 80 to rotate by means of an engaging means. The operatingmember 88 is pivotally connected to the top end of thepush rod 86 by apivot 90. On one side relative to thepivot 90, acam portion 94 is provided and on the other side, ahandle 96 extends generally perpendicular to thecam portion 94. Wherein when thehandle 96 is rotated about the axis of thepivot 90, thecam portion 94 contacts thecontact surface 98 of the housing, thereby causing thepush rod 86 to move up and down.

Referring to fig. 6 and 7, when the workinghead 34 is mounted on the multifunctional machine, the workinghead 34 is sleeved on theadapter 62, so that the connectinghole 56 is sleeved on thefirst adapter 72 of theadapter 62 and is tightly fitted to the first adapter, thereby radially positioning the workinghead 34; handle 96 is then operated to rotate about the axis ofpivot 90,cam portion 94contacts contact surface 98 of the housing, which in turn movespushrod 86 downward so thatrecess 92 ofpushrod 86 engages lockingmember 80; theoperating handle 96 is then rotated about the axis X of theoutput shaft 32 in a tightening direction to rotate the retainingmember 80 together to threadably lock the retainingmember 80 to thefastener 36, at which point theconical spring 63 is compressed and thepressure plate 42 axially compresses the lower surface of the mountingportion 52 of the workinghead 34 until the mountingportion 52 of the workinghead 34 is secured between themating surface 60 and thepressure plate 42, thereby axially securing the workinghead 34. During installation, the workinghead 34 does not move arbitrarily because thefirst transfer portion 72 and theconnection hole 56 are matched with each other.

It is to be understood that the drive mechanism in the present invention is not limited to the structure adopted in the above-described embodiment.

Thesecond adaptor portion 74 and thefirst adaptor portion 72 of theadaptor 62 have different shapes, and can be connected with at least two working heads with different connecting holes. The following describes the matching of theadaptor 62 and another workinghead 100 in this embodiment with reference to fig. 3 to 5 and fig. 8 to 10.

As shown in fig. 3 to 5, thesecond adaptor portion 74 is provided on one axial side of thefirst adaptor portion 72. Thesecond transition portion 74 includes eightbosses 102 extending axially from thefirst transition portion 72. Thebosses 102 extend radially from the central circulartruncated cone 101, and eachboss 102 is independent and circumferentially and uniformly arranged. Theboss 102 has atop surface 103, and thetop surface 103 is in a circular arc transition with the top surface of thefirst transition portion 72.

As shown in fig. 8 to 10, the workinghead 100 has a similar shape to the workinghead 34, and also has a mountingportion 104 and a cuttingportion 106 bent and extended from the mountingportion 104, and the mountingportion 104 is provided with a connectinghole 108. Except that theattachment hole 108 is shaped differently from theattachment hole 56 of the workinghead 34. The connection holes 108 are star-shaped and mate with thesecond transition portion 74 of theadapter 62. The connectinghole 108 includes eight radially extendingcircular protrusions 110, andadjacent protrusions 110 are continuously connected by acurved section 112 toward a center line of the connectinghole 108.

When the multifunctional machine is provided with the workinghead 100, firstly, the workinghead 100 is sleeved on theadapter 62, and the connectinghole 108 is sleeved on thesecond adapter part 74 of theadapter 62, that is, thecircular protrusion 110 is tightly matched with theboss 102, so that the workinghead 100 is positioned in the radial direction; handle 96 is then operated to rotate about the axis ofpivot 90,cam portion 94contacts contact surface 98 of the housing, which in turn movespushrod 86 downward so thatrecess 92 ofpushrod 86 engages lockingmember 80; at this time, the operatinghandle 96 is rotated in the screwing direction about the axis X of theoutput shaft 32, so that the lockingmember 80 is rotated together to screw-lock the lockingmember 80 and thefastening member 36, and at this time, the taperedspring 63 is compressed, and thepressing plate 42 axially presses the lower surface of the mountingportion 104 of the workinghead 100 until the mountingportion 104 of the workinghead 100 is fixed between themating surface 60 and thepressing plate 42, thereby axially fixing the workinghead 100. During the installation process, the workinghead 34 will not move arbitrarily because thesecond adaptor portion 74 and theconnection hole 108 are matched with each other.

The third mountingportion 81 of theadapter 62 is shaped differently from the first andsecond adapter portions 72 and 74 so that other types of work heads can be attached. The following describes the fitting of theadaptor 62 to another workinghead 114 in the present embodiment with reference to fig. 11 and 12.

As shown in fig. 11 and 12, the outer contour of the third mountingportion 81 of theadaptor 62 includes at least a conical surface.

The workinghead 114 has a similar shape to the workinghead 34, and also has a mountingportion 116 and a cuttingportion 118 bent and extended from the mountingportion 116, and the mountingportion 116 is provided with a connectinghole 120. Except that theconnection hole 120 is shaped differently from theconnection hole 56 of the workinghead 34. Theconnection hole 120 is circular and matches with the conical surface of the third mountingportion 81.

When the multifunctional machine is provided with the workinghead 114, firstly, the workinghead 114 is sleeved on theadapter 62, so that the connectinghole 120 is sleeved on the third mountingpart 81 of theadapter 62, and the workinghead 100 is positioned in the radial direction; handle 96 is then operated to rotate about the axis ofpivot 90,cam portion 94contacts contact surface 98 of the housing, which in turn movespushrod 86 downward so thatrecess 92 ofpushrod 86 engages lockingmember 80; at this time, the operatinghandle 96 is rotated about the axis X of theoutput shaft 32 in the tightening direction, thereby rotating the lockingmember 80 together to screw-lock the lockingmember 80 and thefastening member 36, and at this time, the taperedspring 63 is compressed, and thepressing plate 42 axially presses the lower surface of the mountingportion 116 of the working head 128 until the mountingportion 116 of the working head 128 is fixed between themating surface 60 and thepressing plate 42, thereby axially fixing the working head 128.

The adapter is provided with the first and second adapter parts and even the third mounting part to connect various working heads, so that the torque on theoutput shaft 32 can be further transmitted to different types of working heads, and the working heads can be quickly and accurately mounted on theoutput shaft 32 at a specific angle.

It should be noted that the adapter of the present invention is not limited to having only the first, second and third mounting portions, and those skilled in the art will readily appreciate that more mounting portions, such as fourth, fifth mounting portions, etc., may be provided so that a greater variety of working heads having different attachment holes may be attached. The shapes of the first and second transferring portions are not limited to the shapes defined in the first embodiment, and the outer contour may be a conical surface, a cylindrical surface, or the like, or the first transferring portion may be another polygon, a polygon, or the like, and the second transferring portion projections are not limited to eight, as long as more than two projections are provided, and the specific shape of the projections may be another shape such as a cylinder, or the like. Of course, the outer contour of the third mounting portion is not limited to a conical surface, and may be a cylindrical surface or other shaped projections.

Referring to fig. 13 to 15, anadaptor 62 according to a second embodiment of the present invention is substantially the same as theadaptor 62 according to the first embodiment, except that theadaptor 62 is disposed. In the second embodiment, theadapter 62 is provided on theplaten 42. Therefore, theconical spring 63 is disposed between thepressure plate 42 and theadaptor 62, and the elastic force of theconical spring 63 urges theadaptor 62 to axially move toward the direction of contact with the workinghead 34 at all times. A stop ring is provided on thepressure plate 42 to stop theadapter 62 from disengaging. Here, the stop ring is acollar 122 with an opening, on the connecting portion 46 a catch groove is provided. Thecollar 122 is received in the slot to prevent theadapter 62 from disengaging thepressure plate 42.

Thus, theadaptor 62 of this embodiment may also be used with thefastener 36 to form a stand-alone fastening device that may be used to mount multiple work heads to a multi-function machine. As a separate component, the fastening device may facilitate assembly of the multi-function machine. Of course, the fastening device may also be sold as a separate accessory.

As in the first embodiment, the form fitting 70 comprises four evenly arranged formfitting elements 76. In the second embodiment, thepressure plate 42 has a matching portion which matches the shape of the form-fittingelement 76. In this embodiment, the mating portion is the same shape as the form-fittingportion 70, being a recess 124 that mates with the form-fittingelement 76. In this manner, theadapter 62 is form-fit to thepressure plate 42 so that torque on theoutput shaft 32 can be transmitted to the workinghead 34.

The following describes the engagement between the workinghead 34 and thefirst adaptor portion 72 of theadaptor 62 in the present embodiment with reference to fig. 13 to 15. The matching between the other adapter parts of theadapter 62 and the different types of working pairs is the same as that of the first embodiment, and thus the description thereof is omitted here.

When the multifunctional machine is used for mounting the workinghead 34, firstly, the workinghead 34 is sleeved on theadapter 62, so that the connectinghole 56 of the multifunctional machine is sleeved on thefirst adapter part 72 of theadapter 62 and is tightly matched with the first adapter part, and the workinghead 34 is positioned in the radial direction; handle 96 is then operated to rotate about the axis ofpivot 90,cam portion 94contacts contact surface 98 of the housing, which in turn movespushrod 86 downward so thatrecess 92 ofpushrod 86 engages lockingmember 80; theoperating handle 96 is then rotated about the axis X of theoutput shaft 32 in a tightening direction to rotate the retainingmember 80 together to threadably lock the retainingmember 80 to thefastener 36, at which point theconical spring 63 is compressed and thepressure plate 42 axially compresses the lower surface of the mountingportion 52 of the workinghead 34 until the mountingportion 52 of the workinghead 34 is secured between themating surface 60 and thepressure plate 42, thereby axially securing the workinghead 34. During installation, the workinghead 34 does not move arbitrarily because thefirst transfer portion 72 and theconnection hole 56 are matched with each other.

Referring to fig. 16 and 17, anadapter 62 according to a third embodiment of the present invention is substantially the same as theadapter 62 of the second embodiment, except that a blind threaded bore 126 is provided directly in theoutput shaft 32, and a fastener 128 includes a pressure plate 130 and a cylindrical threaded portion 132 extending axially from a central portion of the pressure plate 130. When the workinghead 34 is installed, firstly, the workinghead 34 is sleeved on theadapter 62, so that the connectinghole 56 of the working head is sleeved on thefirst adapter part 72 of theadapter 62 and is tightly matched with the first adapter part, and the workinghead 34 is positioned in the radial direction; the fastener 128 with the workinghead 34 mounted thereto is then attached to theoutput shaft 32; the workinghead 34 can be easily secured between themating surface 60 and the pressure plate 130 by simply engaging the threaded portion 132 of the fastener 128 with the blind threaded bore 126 and rotating the fastener 128 in the tightening direction, thereby axially securing the workinghead 34. During installation, the workinghead 34 does not move arbitrarily because thefirst transfer portion 72 and theconnection hole 56 are matched with each other.

It will be appreciated that the workinghead 34 may be secured to theoutput shaft 32 with fasteners 128 as in the first embodiment where theadapter 62 is mounted to theoutput shaft 32. Similarly, the embodiment only illustrates the matching situation of thefirst adapter portion 72 and the workinghead 34, and the matching situation of other adapter portions of theadapter 62 and other different types of working pairs is the same as that of the first embodiment, which is not repeated herein.

Claims (15)

1. A multifunctional machine comprises an output shaft and a fastener, wherein the output shaft is used for mounting a working head and outputting rotary swing, the fastener is used for mounting the working head on the output shaft, and the output shaft is provided with a matching surface which is contacted with the working head, and the multifunctional machine is characterized in that: the multifunctional machine also comprises an adapter, wherein the adapter is provided with a shape matching part for transmitting the torque on the output shaft to the working heads and a switching part matched and connected with at least two working heads with connecting holes of different shapes, and the switching part at least comprises a first switching part and a second switching part matched and connected with the connecting holes of different shapes; the multifunctional machine further comprises an elastic element which urges the adaptor to move axially towards the direction of connection with the working head.

2. The multi-function machine of claim 1, wherein: the output shaft is provided with a matching part matched with the shape matching part, and the elastic element is arranged between the output shaft and the adapter.

3. The multi-function machine of claim 2, wherein: and a stop piece for stopping the axial disengagement of the adapter is arranged on the output shaft.

4. The multi-function machine of claim 1, wherein: the fastener comprises a pressing plate which is contacted with the working head, a matching part which is matched with the shape matching part is arranged on the pressing plate, and the elastic element is arranged between the pressing plate and the adapter.

5. The multi-function machine of claim 4, wherein: and the fastening piece is provided with a stop ring for stopping the adapter from axially disengaging.

6. The multi-function machine of claim 1, wherein: the adapter comprises a disc-shaped main body, the shape matching part is formed by radially and outwardly extending the outer circumference of the disc-shaped main body, and the first switching part and the second switching part are formed by axially and convexly extending one side of the disc-shaped main body.

7. The multi-function machine of claim 6, wherein: the form fitting includes at least two form fitting elements extending radially outward from an outer circumference of the disc-shaped body.

8. The multi-function machine of claim 6, wherein: the projection of the outer contour of the disc-shaped main body on a plane perpendicular to the output shaft is a polygon.

9. The multi-function machine of claim 1, wherein: the adapter part at least comprises a first adapter part and a second adapter part which are matched with the connecting holes in different shapes in a shape.

10. The multi-function machine of claim 1, wherein: the second switching part is arranged on one side of the first switching part along the axial direction, and the radial sizes of the first switching part and the second switching part are different.

11. The multi-function machine of claim 1, wherein: the projection shapes of the first transfer part and the second transfer part on a plane perpendicular to the output shaft are different.

12. The multi-function machine of claim 1, wherein: the outer contour of at least one of the first transfer part and the second transfer part is a conical surface or a cylindrical surface.

13. The multi-function machine of claim 1, wherein: the projection of the outer contour of the first transfer part on a plane perpendicular to the output shaft is a regular polygon, and the second transfer part comprises at least two protrusions axially extending from the first transfer part.

14. The multi-function machine of claim 1, wherein: the adapter further comprises a third adapter part which is arranged along the axial direction relative to the first adapter part and the second adapter part, and the radial size of the third adapter part is smaller than that of the first adapter part or the second adapter part.

15. The multi-function machine of claim 14, wherein: the outer contour of the third adapter part is a conical surface or a cylindrical surface.

Images