CN113752218A - Oscillation tool - Google Patents

Abstract

The invention discloses an oscillating tool, and belongs to the technical field of electric tools. This oscillation tool includes the casing, centre gripping subassembly and power component, the centre gripping subassembly includes cam mechanism, the output shaft, axle sleeve and elastomer, cam mechanism rotates and connects on the casing, the one end and the cam mechanism butt of output shaft, the other end is provided with first clamping part, the axle sleeve rotates to be connected inside the casing, and the cover is established outside the output shaft, the one end of axle sleeve is provided with the second clamping part, form centre gripping cutting blade's centre gripping space between second clamping part and the first clamping part, the elastomer sets up between output shaft and axle sleeve along the first direction. When the cam mechanism rotates under the action of external force, the output shaft can be driven to move along the first direction relative to the shaft sleeve so as to change the size of the clamping space, and the clamping of the cutting blade is realized. This oscillation tool realizes unblock and locking to cutting blade through the structure of retrenching, and the unblock mode is simple, has retrencied the part, has reduced the size, and cutting blade's installation effectiveness is high.

Description

Oscillation tool

Technical Field

The invention relates to the technical field of electric tools, in particular to an oscillating tool.

Background

The oscillating tool is an electric tool capable of driving a cutting blade to swing left and right and achieving cutting or processing of a material by the left and right swing of the cutting blade. The existing oscillating tool and the cutting blade are generally arranged independently, the cutting blade needs to be mounted on the oscillating tool and locked before use, and the cutting blade needs to be detached from the oscillating tool after use so as to be convenient to store. Furthermore, the independent arrangement facilitates the oscillating tool to be exchanged for a different cutting blade to improve the versatility of the oscillating tool.

However, the existing oscillating tool has the defects that the unlocking process and the locking process are complex and inconvenient for operators to operate before and after the cutting blade is installed. How to provide an oscillating tool which is convenient to unlock and lock so as to improve the assembly efficiency of a cutting blade and the oscillating tool is a technical problem which needs to be solved at present.

Disclosure of Invention

The invention aims to provide an oscillating tool which is easy to unlock and lock and high in assembly efficiency in the process of assembling with a cutting blade.

In order to achieve the purpose, the invention adopts the following technical scheme:

an oscillating tool comprising:

a housing;

the clamping assembly comprises a cam mechanism, an output shaft, a shaft sleeve and an elastic body, the cam mechanism is rotatably connected to the shell, one end of the output shaft is abutted to the cam mechanism, the other end of the output shaft is provided with a first clamping part, the shaft sleeve is rotatably connected to the inside of the shell and sleeved outside the output shaft, one end of the shaft sleeve is provided with a second clamping part, a clamping space for clamping a cutting blade is formed between the second clamping part and the first clamping part, and the elastic body is arranged between the output shaft and the shaft sleeve along a first direction; the cam mechanism is configured to rotate, the clamping assembly has an unlocking state enabling the output shaft to move forwards relative to the shaft sleeve along the first direction to increase the clamping space, and a locking state enabling the output shaft to move backwards along the first direction to reduce the clamping space;

a power assembly configured to drive the shaft sleeve and the output shaft simultaneously in a second direction.

Preferably, the power assembly comprises a motor, an eccentric bearing and a shifting fork, the eccentric bearing is connected to a motor shaft of the motor, a clamping portion is arranged at one end of the shifting fork, the eccentric bearing is located in a first clamping groove of the clamping portion and can rotate in the first clamping groove, and the other end of the shifting fork is connected with the shaft sleeve.

Preferably, the elastic body is a spring, and the spring is sleeved on the output shaft and is positioned between the cam mechanism and the shifting fork.

Preferably, one end of the output shaft, which is close to the cam mechanism, is provided with a butting disc, the cam mechanism is butted against the butting disc, and the spring is sleeved on the output shaft and is positioned between the butting disc and the shifting fork.

Preferably, a sleeve chamber for accommodating the sleeve is formed in the housing, and an inner diameter of the sleeve chamber in a radial direction of the output shaft is set to 18mm or more and 35mm or less.

Preferably, the other end of the shifting fork is sleeved on the shaft sleeve.

Preferably, one of the first clamping part and the second clamping part is provided with a limiting groove, and the other clamping part is provided with a limiting tooth, and the limiting tooth can be clamped in the limiting groove;

the cutting blade is provided with an avoiding hole for avoiding the limiting tooth.

Preferably, the limit teeth are formed on the second clamping portion, and the second clamping portion and the shaft sleeve are integrally formed.

Preferably, a support bearing is arranged in the shell, and the shaft sleeve penetrates through the support bearing.

Preferably, the cam mechanism includes a cam portion and a handle portion connected to each other, and the cam portion abuts on the output shaft.

The invention has the beneficial effects that:

the invention provides an oscillating tool which comprises a shell, a clamping assembly and a power assembly, wherein the clamping assembly comprises a cam mechanism, an output shaft, a shaft sleeve and an elastic body, the cam mechanism is rotatably connected to the shell, one end of the output shaft is abutted to the cam mechanism, the other end of the output shaft is provided with a first clamping part, the shaft sleeve is rotatably connected inside the shell and sleeved outside the output shaft, one end of the shaft sleeve is provided with a second clamping part, a clamping space for clamping a cutting blade is formed between the second clamping part and the first clamping part, and the elastic body is arranged between the output shaft and the shaft sleeve along a first direction. When the cam mechanism rotates under the action of external force, the output shaft can be driven to move in the forward direction or the reverse direction relative to the shaft sleeve along the first direction, so that the size of the clamping space is changed, enough space is provided for clamping the cutting blade, and the clamping of the cutting blade is realized under the action of the elastic body. This oscillation tool realizes unblock and locking to cutting blade through the structure of retrenching, not only makes the unblock mode simple, improves unblock efficiency and unblock maneuverability, and retrench the part, has reduced the size, has improved the efficiency that cutting blade installed to the oscillation tool.

Drawings

FIG. 1 is a schematic diagram of an oscillating tool provided by the present invention;

FIG. 2 is a cross-sectional view of an oscillating tool provided by the present invention;

FIG. 3 is a cross-sectional view of a clamp assembly of an oscillating tool provided by the present invention in an unlocked state;

FIG. 4 is a cross-sectional view of a clamping assembly of an oscillating tool provided by the present invention in a locked state;

FIG. 5 is a schematic view of the clamp assembly, fork and cutting blade of the present invention;

FIG. 6 is an exploded view of the output shaft, sleeve and elastomer provided by the present invention;

fig. 7 is a schematic view of a cutting blade according to the present invention.

In the figure:

1. a housing;

2. a clamping assembly; 21. a cam mechanism; 211. a cam portion; 212. a handle portion; 22. an output shaft; 221. a shaft body; 222. a first clamping portion; 223. a butting tray; 23. a shaft sleeve; 231. a sleeve body; 232. a second clamping portion; 233. limiting teeth; 24. an elastomer;

3. a power assembly; 31. a motor; 32. an eccentric bearing; 33. a shifting fork;

4. a support bearing;

100. a cutting blade; 101. a second clamping groove; 102. avoiding the hole.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.

In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection or a removable connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The present embodiment provides an oscillating tool capable of fixing thecutting blade 100 and driving thecutting blade 100 to swing left and right, thereby achieving cutting and processing of a processing material. As shown in fig. 1 to 4, the oscillation tool includes ahousing 1, a clampingassembly 2 and apower assembly 3, wherein the clampingassembly 2 can be detachably connected with thecutting blade 100, and thepower assembly 3 can drive the clampingassembly 2 to swing left and right, thereby realizing the left and right swing of thecutting blade 100.

Thehousing 1 is a main mounting part of the oscillation tool, and a cavity for mounting the clampingassembly 2 and thepower assembly 3 is formed inside the housing. The rear end of thehousing 1 forms a grip portion that a user can hold in order to operate the oscillating tool. Optionally, the grip portion is provided with an anti-slip pattern.

The clampingassembly 2 is arranged at the front end of theshell 1 and penetrates through theshell 1 along the vertical direction, the bottom end of the clampingassembly 2 can be detachably connected with thecutting blade 100, and the top end of the clampingassembly 2 can be operated to unlock and lock the clampingassembly 2 and thecutting blade 100. When cutting operation is required, thecutting blade 100 is mounted on the clampingassembly 2, and after the cutting operation is completed, thecutting blade 100 can be detached from the clampingassembly 2 so as to be conveniently stored.

Specifically, as shown in fig. 2 to 6, the clampingassembly 2 includes acam mechanism 21, anoutput shaft 22, abushing 23, and anelastic body 24. Wherein, the top of the front end of theshell 1 is provided with a mounting hole, and thecam mechanism 21 is eccentrically installed in theshell 1 through a rotating shaft and protrudes out of the mounting hole. When thecam mechanism 21 rotates about the rotation shaft, the height of the lower bottom surface of the cam changes. Alternatively, in the present embodiment, thecam mechanism 21 includes acam portion 211 and ahandle portion 212, thecam portion 211 is shaped like an ellipse, thehandle portion 212 is shaped like an elongated bar, and a user can apply a torque to thehandle portion 212 to drive thecam portion 211 to rotate around the rotation axis.

Theoutput shaft 22 is provided inside thehousing 1, and the top end of theoutput shaft 22 abuts against thecam portion 211 and the bottom portion thereof is provided with afirst clamping portion 222. When thecam mechanism 21 rotates, theoutput shaft 22 can be driven to move up and down in the first direction. In the present embodiment, since theoutput shaft 22 is vertically disposed when the oscillation tool is in the hand-held state, the first direction is the vertical direction.

Specifically, as shown in fig. 6, theoutput shaft 22 further includes ashaft body 221 and anabutment disc 223, theabutment disc 223 being provided at a top end of theoutput shaft 22 for abutment with thecam portion 211, and thefirst clamping portion 222 being provided at a bottom end of theshaft body 221. Alternatively, theabutting disc 223 is a disc shape, which may be fixedly connected or detachably connected with theshaft body 221, and is not limited herein. The bottom ofaxis body 221 is provided with annular joint inslot, and first clampingpart 222 is installed in this annular joint inslot to realize first clampingpart 222 and the dismantled connection ofaxis body 221.

The length of theshaft sleeve 23 is smaller than that of theoutput shaft 22, and theshaft sleeve 23 is rotatably arranged in theshell 1 and sleeved on the middle lower part of theoutput shaft 22. Optionally, asupport bearing 4 is provided inside thehousing 1, and abushing 23 is provided through the support bearing 4 to enable rotation inside thehousing 1. Specifically, as shown in fig. 6, thesleeve 23 includes asleeve body 231 formed integrally and asecond clamping portion 232 disposed at a bottom end of thesleeve body 231, and thesecond clamping portion 232 and thefirst clamping portion 222 are disposed oppositely to form a clamping space for clamping thecutting blade 100. Alternatively, thefirst clamping portion 222 is a disk structure vertically disposed at the bottom end of theshaft body 221, thesecond clamping portion 232 is a disk structure vertically disposed at the bottom of thesleeve body 231, and an annular clamping space is formed between thefirst clamping portion 222 and thesecond clamping portion 232.

Theelastic body 24 is arranged between theoutput shaft 22 and theshaft sleeve 23 in the vertical direction, and theelastic body 24 is in a compressed state when theoutput shaft 22 moves downwards relative to theshaft sleeve 23, so that a restoring force can be provided for theoutput shaft 22 when thesubsequent output shaft 22 needs to move upwards, and automatic resetting of theoutput shaft 22 and clamping of thecutting blade 100 by the oscillating tool are realized. In this embodiment, theelastic body 24 is a spring, which is sleeved on theoutput shaft 22 and located between theabutting disk 223 and theshaft sleeve 23.

Since the height of the abutment of thecam portion 211 of thecam mechanism 21 and theabutment disc 223 of theoutput shaft 22 varies during the rotation of thecam mechanism 21, when the height of the abutment gradually decreases, theoutput shaft 22 moves downward, thefirst clamping portion 222 moves downward synchronously, and since the height of thesleeve 23 and thesecond clamping portion 232 thereon in the vertical direction remains unchanged, the width of the clamping space between thefirst clamping portion 222 and thesecond clamping portion 232 gradually increases, and the connecting end of thecutting blade 100 can be placed in the clamping space; and when the height of the abutment of thecam portion 211 with theabutment disc 223 gradually rises, theoutput shaft 22 moves upward by the drive of theelastic body 24, thefirst clamping portion 222 moves upward in synchronization, and the width of the clamping space between thefirst clamping portion 222 and thesecond clamping portion 232 gradually decreases, thereby clamping thecutting blade 100 in the clamping space.

After the clampingassembly 2 clamps thecutting blade 100, thepower assembly 3 is operated to drive thecutting blade 100 to swing in a second direction, which is the circumferential direction of theoutput shaft 22 in this embodiment, and which is located in a horizontal plane perpendicular to the vertical direction. Specifically, as shown in fig. 2 to 4, thepower assembly 3 includes amotor 31, aneccentric bearing 32, and ashift fork 33. Themotor 31 is horizontally arranged inside thehousing 1, and a motor shaft of themotor 31 is horizontally arranged. Theeccentric bearing 32 is connected to the motor shaft of themotor 31, and the eccentricity e of theeccentric bearing 32 is determined according to the swing angle that thecutting blade 100 needs to reach, which is not limited herein. Theyoke 33 is used to connect between theeccentric bearing 32 and the clampingassembly 2, thereby converting the rotation of theeccentric bearing 32 into the oscillation of thecutting blade 100 in the horizontal plane.

Specifically, in this embodiment, one end of theshift fork 33 is provided with a clamping portion, and the clamping portion is provided with a first clamping groove, optionally, the first clamping groove is a U-shaped groove, the opening direction of the U-shaped groove is horizontally arranged, and theeccentric bearing 32 is arranged in the first clamping groove and can freely rotate in the first clamping groove. When theeccentric bearing 32 is rotated around the motor shaft of themotor 31 by the driving of themotor 31, the contact point of the engagement portion of theeccentric bearing 32 and theshift fork 33 moves left and right in the horizontal plane, and the other end of theshift fork 33 moves accordingly. The other end ofshift fork 33 is connected withaxle sleeve 23, and optionally, be provided with the cover on the other end ofshift fork 33 and establish the hole, andaxle sleeve 23 is located this cover and establishes downtheholely, interference fit or fixed connection between the two to realize synchronous motion. It should be noted that, since thefork 33 is connected to thesleeve 23, the above-mentioned spring may also be provided between theabutment plate 223 and thefork 33.

The housing includes a head case formed at a front end thereof, and theoutput shaft 22 and theboss 23 are disposed in the head case. The head shell forms at its lower end a sleeve chamber which accommodates thesleeve 23 and the sleeve bearing, in this embodiment the maximum inner diameter of the sleeve chamber in the radial direction of the output shaft is reduced to 18mm to 35mm, which may be 18mm, 26mm, 28mm, 31mm, 33mm or 35mm, for example. Compared with the prior art in which theelastic body 24 is required to be arranged between theshift fork 33 and thesecond clamping portion 232, so that the inner diameter of the sleeve chamber is increased, in the embodiment, since theelastic body 24 is arranged between theoutput shaft 22 and thesleeve 23 and is located above theshift fork 33, the radial size of the sleeve chamber is greatly reduced, and the size of the head shell is also greatly reduced.

When theshift fork 33 is driven by theeccentric bearing 32 to move in the horizontal plane, thesleeve 23 and theoutput shaft 22 can rotate synchronously in the horizontal plane. In order to realize the synchronous rotation of theshaft sleeve 23 and theoutput shaft 22 in the horizontal plane, the clamping surface of thefirst clamping part 222 is provided with a limitingtooth 233, the clamping surface of thesecond clamping part 232 is provided with a limiting groove, and the limitingtooth 233 can be clamped into the limiting groove, so that when theshaft sleeve 23 rotates under the driving of the shiftingfork 33, theoutput shaft 22 can synchronously rotate, and further the synchronous rotation of thecutting blade 100 can be realized. Since thecutting blade 100 is located between thefirst clamping portion 222 and thesecond clamping portion 232, in order to avoid the existence of thecutting blade 100 from affecting the synchronous rotation of theshaft sleeve 23 and theoutput shaft 22, as shown in fig. 7, an avoidinghole 102 is formed in thecutting blade 100, and the limitingtooth 233 can penetrate through the avoidinghole 102 and be clamped in the limiting groove. Optionally, in this embodiment, the limitingteeth 233, thefirst clamping portion 222 and theshaft sleeve 23 are integrally formed, and no additional connecting structure is needed to connect the limitingteeth 233, thefirst clamping portion 222 and theshaft sleeve 23, so that the structural compactness and the structural strength are greatly improved, and the overall size and the connecting cost are reduced.

Further, be provided with a plurality of spacingteeth 233 onfirst clamping part 222, a plurality of spacingteeth 233 are arranged radially onfirst clamping part 222, are provided with a plurality of spacing grooves onsecond clamping part 232, and a plurality of spacing grooves are arranged radially at second clampingpart 232 to set up with a plurality of spacingteeth 233 one-to-one, in order to improve spacing effect. Of course, in other embodiments, the positions of the limitingteeth 233 and the limiting holes can be interchanged, that is, the limitingteeth 233 are disposed on thesecond clamping portion 232, and the limiting grooves are disposed on thefirst clamping portion 222.

In order to avoid the influence of the rotation of theoutput shaft 22 in the vertical direction on the device of thecam mechanism 21, an avoiding groove is provided on thecam portion 211 of thecam mechanism 21, and the top end of theshaft body 221 of theoutput shaft 22 is disposed to protrude out of theabutting disc 223 and is placed in the avoiding groove. When theoutput shaft 22 rotates, the tip end of theshaft body 221 can rotate in the escape groove, and the influence of the rotation of theoutput shaft 22 on the position of thecam portion 211 is eliminated.

The operation of the oscillation tool includes a mounting process of thecutting blade 100 and a swing process of thecutting blade 100.

Wherein, the installation process of thecutting blade 100 is as follows:

first, thecam mechanism 21 is rotated to a state shown in fig. 3, in which the clamping space between thefirst clamping portion 222 and thesecond clamping portion 232 is maximized; then, the end of thecutting blade 100 provided with thesecond clamping groove 101 is inserted between thefirst clamping portion 222 and thesecond clamping portion 232, and thesecond clamping groove 101 is clamped to theoutput shaft 22; finally, thecam mechanism 21 is rotated in reverse to the state shown in fig. 4, at which theoutput shaft 22 is automatically reset by the driving of theelastic body 24, the clamping space between thefirst clamping portion 222 and thesecond clamping portion 232 is lowered, and thecutting blade 100 is clamped in the clamping space, thereby achieving the assembly of thecutting blade 100 and the oscillation tool.

Thecutting blade 100 swings as follows:

themotor 31 is powered on, a motor shaft of themotor 31 rotates and drives theeccentric bearing 32 to rotate, the shiftingfork 33 swings left and right in the horizontal plane under the driving of theeccentric bearing 32 and drives theshaft sleeve 23 to rotate left and right around the axis of the shaft sleeve, and theoutput shaft 22 can synchronously rotate along with theshaft sleeve 23 due to the clamping connection of the limitingteeth 233 and the limiting grooves, so that thecutting blade 100 swings left and right in the horizontal plane, and the cutting end of thecutting blade 100 can perform cutting operation.

In summary, compared with an oscillating tool using a spiral unlocking device in the prior art, the oscillating tool provided by the embodiment realizes unlocking and locking of thecutting blade 100 through a simplified structure, so that the unlocking and locking modes are simple, the unlocking efficiency and the unlocking operability are improved, parts are simplified, the size is reduced, and the efficiency of installing thecutting blade 100 on the oscillating tool is improved. And by disposing the spring between theshift fork 33 and thecam mechanism 21, the radial dimension of the lower portion of theoutput shaft 22 can be greatly reduced to a great extent. The oscillating tool has the advantages of compact structure, small volume and simple internal structure, and is beneficial to reducing the manufacturing cost.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (10)

1. An oscillating tool, comprising:

a housing;

the clamping assembly comprises a cam mechanism, an output shaft, a shaft sleeve and an elastic body, the cam mechanism is rotatably connected to the shell, one end of the output shaft is abutted to the cam mechanism, the other end of the output shaft is provided with a first clamping part, the shaft sleeve is rotatably connected to the inside of the shell and sleeved outside the output shaft, one end of the shaft sleeve is provided with a second clamping part, a clamping space for clamping a cutting blade is formed between the second clamping part and the first clamping part, and the elastic body is arranged between the output shaft and the shaft sleeve along a first direction; the cam mechanism is configured to rotate, the clamping assembly has an unlocking state enabling the output shaft to move forwards relative to the shaft sleeve along the first direction to increase the clamping space, and a locking state enabling the output shaft to move backwards along the first direction to reduce the clamping space;

a power assembly configured to drive the shaft sleeve and the output shaft simultaneously in a second direction.

2. The oscillation tool of claim 1,

the power assembly comprises a motor, an eccentric bearing and a shifting fork, the eccentric bearing is connected to a motor shaft of the motor, a clamping portion is arranged at one end of the shifting fork, the eccentric bearing is located in a first clamping groove of the clamping portion and can rotate in the first clamping groove, and the other end of the shifting fork is connected with the shaft sleeve.

3. The oscillation tool of claim 2,

the elastic body is a spring, and the spring is sleeved on the output shaft and is positioned between the cam mechanism and the shifting fork.

4. The oscillation tool of claim 3,

the output shaft is close to the one end of cam mechanism is provided with the butt flange, cam mechanism supports and presses on the butt flange, the spring housing is established on the output shaft, and be located the butt flange with between the shift fork.

5. The oscillation tool of claim 2,

a sleeve chamber for accommodating the sleeve is formed in the housing, and the inner diameter of the sleeve chamber in the radial direction of the output shaft is set to be 18mm or more and 35mm or less.

6. The oscillation tool of claim 2,

the other end of the shifting fork is sleeved on the shaft sleeve.

7. The oscillation tool of claim 1,

one of the first clamping part and the second clamping part is provided with a limiting groove, and the other clamping part is provided with a limiting tooth which can be clamped in the limiting groove;

the cutting blade is provided with an avoiding hole for avoiding the limiting tooth.

8. The oscillation tool of claim 7 wherein,

the limiting teeth are formed on the second clamping portion, and the second clamping portion and the shaft sleeve are integrally formed.

9. The oscillation tool of claim 1,

a supporting bearing is arranged in the shell, and the shaft sleeve penetrates through the supporting bearing.

10. The oscillation tool of any one of claims 1 to 9,

the cam mechanism comprises a cam portion and a handle portion which are connected with each other, and the cam portion is abutted on the output shaft.

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