The chuck structure of medical sawTechnical field
The present invention relates to a kind of cutting tool, belong to technical field of medical instruments.
Background technology
Medical saw generally includes saw blade and the chuck structure of clamping saw blade, usually used as the surgical technique and tools of bone material cutting.Wherein yaw formula saw blade (hereinafter referred to as saw blade) is common one, including bar shaped, sheet noumenon, forms sawtooth portion in the one end in body length direction, and the other end forms shank.Shank central authorities in the width direction are provided with through hole and get through through hole along its length to the cannelure of shank termination.Chuck structure generally includes and the saw blade seat of saw blade handle mate grafting, and saw blade seat seat intracavity is provided with the pin coordinated with through hole, is used for positioning saw blade shank.Such as Publication No. US8,100, a kind of chuck structure disclosed in the patent documentation of 912 B2, as shown in Figure 1-2, it promotes flat-sale 240 to compress saw blade 32 by spring and arrives saw blade seat 156 intracavity, concrete, flat-sale 240 is located in the through hole of saw blade 32, under the promotion of spring, two seamed edges of saw blade 32 are promoted to arrive on two inclined-planes 162 of saw blade seat 156 groove, so that saw blade 32 fixing and location in saw blade seat 156 groove.But when installing saw blade, it is difficult to ensure that saw blade keeps vertical with flat-sale axis in saw blade seat, the biggest it is probably that saw blade is crooked to be positioned in saw blade seat, and once saw blade is crooked, because flat-sale axis and swinging axle are coaxial, saw blade and swinging axle out of plumb can be caused, cause the problem that cut quality is poor, unstable.
Summary of the invention
nullA kind of chuck structure of medical saw，For clamping the saw blade of medical saw，Described saw blade has a shank coordinated with chuck structure，It is characterized in that，Including first compressing member with the first compressed part that can be close to described shank side，And arrange towards described first compressed part、Can relatively close and at least two the second compressing member away from described first compressed part，Described first compressed part by multiple in the same plane and can point with the laminating of described shank side form simultaneously，Described second compressing member has the inclined plane shape or curved the second compressed part arranged towards the first compressed part，Space between first compressing member and whole second compressing member entirety is used for housing described shank，Described chuck structure also includes to be fitted by the one side of shank and being pressed on described first compressed part，Correspondence two seamed edge of opposite side is pressed on the compression spring in the second compressed part of corresponding second compressing member respectively simultaneously.
Preferably, when on described saw blade, contact site with the first compressed part is provided with through hole, the area that the region area that in the first compressed part, whole described points enclose encloses more than or equal to described through hole peritreme.
Preferably, described medical saw includes a mounting seat of propclip header structure, described chuck structure also includes laying respectively at described first compressing member two ends and being perpendicular to two retaining walls that the first compressed part place plane extends to the second compressing member, and described retaining wall is fixed relative to the mounting seat of described medical saw.
Preferably, described chuck structure, also include a block top-pressure part, when described second compressed part is fixed relative to mounting seat, described top-pressure part is arranged on first compressing member outside relative to the second compressing member, top-pressure part can with relative to the first compressed part place planar tilt direction near and away from the second compressed part, described compression spring promotes top-pressure part the first compressed part to be pressed to the second compressing member top being perpendicular to the first compressed part place in-plane with the direction being parallel to the first compressed part place plane；When described first compressed part is fixed relative to mounting seat, described top-pressure part is arranged on second compressing member outside relative to the first compressing member, top-pressure part can with relative to the first compressed part place planar tilt direction near and away from the first compressed part, described compression spring promotes top-pressure part to be pressed to the first compressed part top by the second compressing member being perpendicular to the first compressed part place in-plane with the direction being parallel to the first compressed part place plane.
Preferably, the direction of described top-pressure part inclination movement is 10-15 ° with the angle angle of the first compressed part place in-plane.
Preferably, described retaining wall is provided with the bar shaped pilot hole of length direction and described first compressed part place plane holder acute angle, and being respectively arranged at two ends with of described top-pressure part can be embedded the guide moved in described pilot hole along pilot hole length direction.
Preferably, described top-pressure part is provided with jack, and described guide is plugged in described jack and stretches into pilot hole.
Preferably, when described top-pressure part is arranged on the first compressing member relative to the outside of the second compressing member, top-pressure part and the first compressing member are connected.
Preferably, described chuck structure also includes the locating part of the lamellar or tabular that are installed between two retaining walls, and described locating part is provided with at least two spacing hole, houses described second compressing member respectively.
Preferably, the inner side of described retaining wall is provided with and is perpendicular to the gathering sill that the first compressed part place plane extension communicates with described spacing hole and coordinates with described second compressing member.
Preferably, whole second compressing member axial symmetry are arranged.
Preferably, at least four the second compressing member axial symmetry is arranged, and the second compressing member is the spherical shape that can rotate around self centre of sphere.
Preferably, described top-pressure part is provided with stopper slot, and one end of described compression spring is fixed relative to described mounting seat, and the other end stretches into stopper slot, directly or indirectly compresses stopper slot bottom land.
Preferably, described stopper slot passes to guide, described guide offers guide groove towards the side of stopper slot, with collectively form stopper slot bottom land bottom stopper slot, being provided with the spacing ball coordinated with described guide groove in stopper slot, the corresponding end of described compression spring is pressed on top-pressure part stopper slot bottom land by described spacing ball of conflicting.
The beneficial effect that the present invention is reached:
1. the chuck structure of the medical saw of the present invention, by multiple spot the first compressed part in the same plane and inclined plane shape or the cooperation of curved second compressed part, the one side of the shank of saw blade can be fitted and be pressed on the first compressed part, correspondence two seamed edge of opposite side is pressed in the second compressed part of corresponding second compressing member respectively simultaneously, saw blade is made to be parallel to the first compressed part place plane compacted, avoid crooked, advantageously ensure that cut quality and cutting stability, and be applicable to the saw blade shank of different-thickness.
2. being fixedly installed of two retaining walls, at least can carry out spacing at width to saw blade shank, it is also possible to further the first compressing member, the second compressing member and top-pressure part are played position-limiting action, improve clamping effect.
3. arranging can be the most close, away from the first compressing member or the top-pressure part of the second compressing member, then can be parallel to the first compressed part place in-plane to arrange compression spring, become parallel the thrust that thrust is vertical first compressed part place in-plane in the first compressed part place in-plane to promote top-pressure part and to realize the compression of first, second compressing member, thus save the space being perpendicular to the first compressed part place in-plane, make chuck structure more compact.
4. the direction of top-pressure part inclination movement is 10-15 ° with the angle angle of the first compressed part place in-plane, then coordinate more stable with top-pressure part of compression spring, saw blade is applied enough thrusts simultaneously.
5. the pilot hole of inclination is set on retaining wall, can make top-pressure part guide be embedded wherein thus the motion track of stability contorting top-pressure part.
6. top-pressure part and guide are set to the form of split, then easy disassembly chuck structure, renewal part.
7. when top-pressure part is arranged on outside the first compressing member, it is connected with the first compressing member, then top-pressure part move i.e. synchronize drive the first compressing member near and away from the second compressing member, when saw blade shank is inserted between first, second compressing member, can press by the top with the first compressed part and rub, promote the first compressing member and top-pressure part away from the second compressing member voluntarily, obtain suitable space thus insert smoothly, one-handed performance can be realized when therefore loading saw blade, and carry out assisting to install without additionally forcing in top-pressure part.
8. fixing locating part is set, can limit the position of the second compressing member by spacing hole, thus ensure the position of the second compressed part and inclination or degree of crook, stablize impaction state.
9. the inner side of retaining wall arranges gathering sill, spacing hole can be coordinated preferably to carry out the second compressing member spacing or guide, can keep stable when it is close and away from the first compressed part, not rock.
Whole second compressing member axial symmetry are arranged, and the second compressing member can be made to balance the compression of saw blade shank in axis of symmetry both sides, the most stable compression to saw blade.Especially four the second compressing member axial symmetry are arranged, and take into account the guarantee to thrust and balance, and the saving of part.And if the second compressing member is rotating ball; on the one hand; when saw blade be initially in askew status by first compressed part extruding during; the seamed edge of saw blade is puted forth effort on rotating second compressing member surface; make saw blade be easier to the state being adjusted to be parallel to the first compressed part place plane, and the second compressing member can keep the stable compression to shank with same curved surface all the time, on the other hand also can reduce the friction of the second compressing member and saw blade; can preferably protect saw blade, reduce abrasion.
Arrange stopper slot on 11. top-pressure parts, then the free end of compression spring stretches into stopper slot and can obtain a certain degree of spacing so that it is more stable to the promotion of top-pressure part.
12. in the case of controlling chuck structure length, in order to extend stopper slot length, and stretching of further constant compression spring, stopper slot can be passed to guide.Now, further, can arrange spacing ball in stopper slot, constant compression spring free end compresses with stopper slot bottom land.It addition, offer guide groove over the guide so that guide groove coordinates with spacing ball, top-pressure part is more smooth and easy along moving of pilot hole direction.
Accompanying drawing explanation
Fig. 1 is the schematic diagram that existing chuck structure coordinates with saw blade；
Fig. 2 is the 28-28 sectional view of Fig. 1；
Fig. 3 is the medical saw with the embodiment of the present invention 1 chuck structure；
Fig. 4 is the side-looking enlarged drawing of Fig. 3 chuck structure；
Fig. 5 is the assembling schematic diagram of embodiment 1 chuck structure and saw blade；
Fig. 6 is the close-up schematic view of Fig. 5；
Fig. 7 is the embodiment 1 chuck structure side view cutaway drawing that saw blade is in compacted state；
Fig. 8 is the side view cutaway drawing of Fig. 7；
Fig. 9 is the C-C sectional view of Fig. 7；
Figure 10 is the B-B sectional view of Fig. 7；
Figure 11 is the A-A sectional view of Figure 10；
Figure 12 is the embodiment 1 chuck structure side view cutaway drawing that saw blade is in releasing orientation；
Figure 13 is the sectional view of Figure 12；
Figure 14 is the saw blade seat schematic diagram of embodiment 2；
Figure 15 is the A-A sectional view of Figure 14；
Figure 16 is the saw blade seat schematic diagram of embodiment 3；
Figure 17 is the A-A sectional view of Figure 16；
Figure 18 is the saw blade seat schematic diagram of embodiment 4；
Figure 19 is the embodiment 5 chuck structure side view cutaway drawing that saw blade is in compacted state；
Figure 20 is the B-B sectional view of Figure 19；
Figure 21 is the A-A sectional view of Figure 20；
Figure 22 is the embodiment 5 chuck structure side view cutaway drawing that saw blade is in releasing orientation；
Figure 23 is the sectional view of Figure 22；
Figure 24 is saw blade seat schematic diagram in embodiment 5；
Figure 25 is top-pressure part schematic diagram in embodiment 5；
Wherein: 240, flat-sale, 32, saw blade, 156, saw blade seat, 162, inclined-plane；
null1、Saw blade，12、Shank，122、Side，124、Seamed edge，126、Through hole，128、Cannelure，2、Lower plate，22、Through hole，24、Upper surface，242、Slope，34、Locking pin，36、Mounting seat，4、Upper plate，42、Upper surface，44、Spacing hole，46、Long waist shaped hole，52、Place kick，54、Locating piece，542、Inclined-plane，6、Side plate，62、First，64、Second，642、Pilot hole，66、Gathering sill，72、Briquetting， 722、Top pressure surface，723、Lower surface，724、Jack，725、Jack，726、Stopper slot，728、Side，729、Upper surface，74、Inserted block，742、Guide groove，76、Latch，78、Assisted parts，782、Annular end，8、End plate，92、Compression spring，94、Spacing ball，96、Backing pin.
Tool part is implementedMode
The invention will be further described below in conjunction with the accompanying drawings.Following example are only used for clearly illustrating technical scheme, and can not limit the scope of the invention with this.
Embodiment 1
As shown in Fig. 3-13, the chuck structure of medical saw, for clamping the saw blade 1 of medical saw, wherein saw blade 1 has a shank 12 coordinated with chuck structure, shank 12 is provided with through hole 126 and gets through the cannelure 128 of through hole 126 to shank 12 outer end, and cannelure 128 width is less than through hole 126 diameter.Chuck structure includes first compressing member with the first compressed part that can be close to shank 12 side, and arrange towards the first compressed part, can be relatively close and two ranked second compressing member away from the first compressed part.First compressed part specially can be with the plane of shank 12 side laminating, and the second compressing member has curved the second compressed part arranged towards the first compressed part, and the space between the first compressing member and whole second compressing member entirety is used for housing shank 12.Chuck structure also includes the one side 122 of shank 12 fitting and be pressed on the first compressed part, correspondence two seamed edge 124 of opposite side is pressed on a corresponding compression spring 92 that ranked second in the second compressed part of compressing member respectively simultaneously.
Concrete, chuck structure includes saw blade seat.Saw blade seat includes respectively tabular and lower plate 2 arranged in parallel and upper plate 4, and is fixedly arranged on lower plate 2 two ends, is respectively perpendicular the side plate 6 extending and protruding from upper plate 4 to upper plate 4 direction.Lower plate 2 is as described first compressing member, through hole 22 is offered at middle part, receiving is located at locking pin 34 top below saw blade seat and is stretched into, locking pin 34 protrudes from lower plate 2 upper surface 24 and arranges, projecting height is less than saw blade 1 shank 12 thickness, and protuberance is adaptive with the through hole 126 of saw blade 1 shank 12, but size is more than saw blade 1 cannelure 128 width.Locking pin 34 is specifically located in a mounting seat 36, and saw blade seat is fixed also relative to mounting seat 36 simultaneously, and mounting seat 36, as the support of saw blade seat, can use the structure that the industry is general.The upper surface 24 of lower plate 2 is as described first compressed part, and therefore, the first compressed part is fixed also relative to mounting seat 36, and locking pin 34 axis is perpendicular to upper surface 24 and arranges.Owing to using the first plane compressed part in the present embodiment, it is ensured that and contact area bigger between shank 12, improve stability further.Concrete, upper surface 24 covers whole side 122, optimal stability with the contact area of shank 12 side 122.One end of lower plate 2 is also vertically arranged connection upper plate 4 and the end plate 8 of biside plate 6, thus closes one end outlet of the cavity accommodating saw blade 1 shank 12 formed between upper plate 4 and lower plate 2, and forms the insert port of saw blade 1 shank 12 at the other end.Lower plate 2 is downward-sloping near upper surface 24 one end of insert port, forms slope 242, it is simple to the insertion of saw blade 1.Side plate 6 includes connecting lower plate 2 and first 62 of upper plate 4 as retaining wall, and protrudes from second 64 of upper plate 4, and first 62 thickness is more than second 64.Distance between two first 62 can house saw blade 1 shank 12 just.Upper plate 4, as described locating part, is more than shank 12 thickness with the vertical dimension of lower plate 2, and upper surface 42 is parallel with self lower surface and lower plate 2 upper surface 24.Upper plate 4 be respectively arranged at two ends with the row spacing hole 44 along saw blade 1 direction of insertion, two row's spacing hole 44 axial symmetry are arranged, often two spacing holes 44 of row.Accommodating second compressing member in each spacing hole 44, the second compressing member is specially the place kick 52 of spherical shape, and the second compressed part is curved, such as steel ball, and spacing hole 44 is shaped as the circle matched with place kick 52.Place kick 52 is rotatable in spacing hole 44; during saw blade 1 is in acock by the first compressed part extruding; the seamed edge 124 of saw blade 1 is puted forth effort on rotating place kick 52 surface; saw blade 1 is made to be easier to the state being adjusted to be parallel to upper surface 24; and place kick 52 can keep the stable compression to shank 12 with same curved surface all the time; on the other hand also can reduce the friction of the second compressing member and saw blade 1, can preferably protect saw blade 1, reduce abrasion.As long as additionally arranging the position of place kick 52 to saw blade 1 pressure balance, then can save the second compressing member material on the whole.In the present embodiment, spacing hole 44 is through hole, and therefore place kick 52 can be moved along being perpendicular to upper surface 24 direction wherein.More specifically, the inner side that side plate is 6 first 62 and second 64 is respectively equipped with and is perpendicular to the first compressed part place plane namely upper surface 24 extends and the gathering sill 66 that communicates with spacing hole 44, gathering sill 66 shape matches with place kick 52 profile, and therefore place kick 52 can be stable stretches out spacing hole 44 to two side portions respectively and move along corresponding gathering sill 66.
In saw blade seat, between the top of upper plate 4, biside plate 6 second 64, it is provided with the briquetting 72 as top-pressure part.Briquetting 72 has can push up the top pressure surface 722 pressing place kick 52 to compress lower plate 2 upper surface 24, briquetting 72 can relative to upper surface 24 at a slant near and away from, therefore compression spring 92 be parallel to upper surface 24 direction promote briquetting 72 being perpendicular to upper surface 24 direction, place kick 52 can be pressed to the first compressed part top.Wherein briquetting 72 is relative to the angle [alpha] of upper surface 24 inclination movement preferably at 10-15 °, especially 12 ° so that compression spring 92 and briquetting 72 more stable the coordinating of energy, saw blade 1 is applied enough thrusts simultaneously.Concrete, side plate 6 second 64 is provided with length direction and upper plate 4 upper surface 42 and presss from both sides the bar shaped pilot hole 642 at α angle, and being respectively arranged at two ends with of briquetting 72 can be embedded in pilot hole 642 guide driving briquetting 72 to move along pilot hole 642 length direction.Guide is specially and adapts, is shorter in length than the inserted block 74 of pilot hole 642 with pilot hole 642 shape, and its advantage is that quantity is single, and the length in guide direction is longer, guides stable.And pilot hole 642 is specifically as follows opening counterbore inwardly, it is also possible to be through hole, as long as the motion of briquetting 72 can be played guide effect.More specifically, inserted block 74 and briquetting 72 can be split type demountable structures.Being arranged parallel to the jack 724 in pilot hole 642 direction on briquetting 72, inserted block 74 is plugged in jack 724 and stretches into pilot hole 642, thus easy disassembly chuck structure, renewal part.
One end of compression spring 92 is fixed on end plate 8, and the other end directly or indirectly compresses briquetting 72.Concrete, briquetting 72 is provided with axis towards one end of end plate 8 and is parallel to push up the stopper slot 726 of pressure surface 722, and the respective end of compression spring 92 stretches into stopper slot 726, is pressed on stopper slot 726 bottom land.More specifically, stopper slot 726 passes to jack 724, inserted block 74 offers guide groove 742 towards the side of stopper slot 726, with collectively form stopper slot 726 bottom land bottom stopper slot 726, being provided with the spacing ball 94 coordinated with guide groove 742 in stopper slot 726, the corresponding end of compression spring 92 is pressed on the bottom land of briquetting 72 stopper slot 726 by conflict spacing ball 94.Therefore, compression spring 92 gives inserted block 74 and briquetting 72 pressure by spacing ball 94, makes the pressure place kick 52 of briquetting 72 top.Wherein, spacing ball 94 can also be steel ball.
It is block that briquetting 72 is specially wedge shape, i.e. the side 728 back to top pressure surface 722 is obliquely installed relative to top pressure surface 722, thus form the gradient and conveniently promote briquetting 72 top pressure compression spring 92 to unclamp saw blade 1.Although in the present embodiment, pushing by the shape of design briquetting 72 is convenient, but the invention is not restricted to this structure.Inserted block 74 can also be set and stretch out pilot hole 642, thus move the position of briquetting 72 by stirring inserted block 74.
Saw blade seat is additionally additionally provided with two backing pins 96, saw blade 1 shank 12 front end is positioned.
The using method of the present embodiment chuck structure is described below.Time initial, compression spring 92, by spacing ball 94 top pressure briquetting 72, makes briquetting 72 move against the upper surface 42 at upper plate 4 along pilot hole 642, and during this, the top pressure surface 722 of briquetting 72 contacts four place kick 52 and place kick 52 is pressed on the first compressed part.nullDuring use，First briquetting 72 is promoted to end plate 8 side，Compression spring 92 is further compressed to 12-13 position shown in figure，Now the top pressure surface 722 of briquetting 72 leaves upper plate 4 upper surface 42，Loosen the pressure to place kick 52，It is thus possible to the shank 12 of saw blade 1 to be inserted cavity from insert port one end of saw blade seat，Owing to shank 12 cannelure 128 cannot pass through locking pin 34 protuberance，Move along being close to upper plate 4 lower surface when therefore inserting，Pass through above locking pin 34，Place kick 52 is contacted during Gai，And by place kick 52 to top, briquetting 72 direction pressure，The whole shank 12 of last saw blade 1 enters cavity，Simultaneously，Through hole 126 is located exactly at directly over locking pin 34，Now unclamp briquetting 72，Under the effect of compression spring 92，Shank 12 is pressed on the first compressed part i.e. upper surface 24 of lower plate 2 by place kick 52，Simultaneously，Shank 12 through hole 126 is just enclosed within locking pin 34 and stretches out the protuberance of lower plate 2，Obtain spacing，The curved surface of now place kick 52 also compresses correspondence two seamed edge 124 of location shank 12，As illustrated in figures 7-11.During saw blade 1 to be removed, being promoted to end plate 8 side by briquetting 72 equally, the top pressure surface 722 of briquetting 72 leaves upper plate 4 upper surface 42, loosen the pressure to place kick 52, thus unclamp saw blade 1, now can be by saw blade 1 to upper plate 4 backup, make abjection locking pin 34, thus take out.Finally decontrol briquetting 72, then briquetting 72 is pushed back original state again under the effect of compression spring 92.
Embodiment 2
As shown in Fig. 3-15, the chuck structure of medical saw, the difference with embodiment 1 is: only relies on side plate 6, place kick 52 and locking pin 34 in saw blade seat and positions, and is not provided with backing pin 96 and positions saw blade 1 shank 12 front end.
Embodiment 3
Such as Fig. 3-13, shown in 16, the chuck structure of medical saw, the difference with embodiment 1 is: be provided with two the second compressing members, and the second compressing member has inclined plane shape the second compressed part.
Concrete, the second compressing member is rectangular strip locating piece 54, and side chamfering forms the inclined-plane 542 relative to the first compressed part place planar tilt as the second compressed part.Spacing hole 44 shape is also for the rectangle matched with locating piece 54.Relative to the advantage of spherical locating piece 54, square locating piece 54 is that the contact surface with spacing hole 44 and side plate 6 is plane, mobile more stable, therefore can not set gathering sill 66, and be not easy to roll and lose during assembling.Second compressing member is that the advantage of strip is to save the second compressing member quantity, can guarantee that again the stability to saw blade 1 top pressure simultaneously.
Embodiment 4
Such as Fig. 3-13, shown in 18, the chuck structure of medical saw, the difference with embodiment 1 is: guide is specially two latches 76, also offers two jacks 725 for plugging latch 76 on briquetting 72 simultaneously.
Latch 76 and briquetting 72 split type demountable structure.On briquetting 72, the position line of two jacks 725 is arranged parallel to pilot hole 642 direction, and two jack 725 spacings are less than pilot hole 642 length.Latch 76 is plugged in jack 725 and stretches into pilot hole 642, thus easy disassembly chuck structure, renewal part.Latch 76 is to save material relative to the advantage of inserted block 74, is readily available, and the jack 725 of briquetting 72 is also easier to processing.Now without arranging spacing ball 94 in the stopper slot 726 of briquetting 72, compression spring 92 free end is directly pressed on stopper slot 726 bottom land, assembles the most more convenient.
Embodiment 5
As shown in Fig. 3-13,19-25, the chuck structure of medical saw, the difference with embodiment 1 is:
Lower plate 2 is as locating part, and the two ends of lower plate 2 are respectively provided with row's spacing hole 44, and two row's spacing hole 44 axial symmetry are arranged, often two spacing holes 44 of row, and place kick 52 is housed in spacing hole 44.In the present embodiment, spacing hole 44 is counterbore, and therefore place kick 52 is limited in wherein the most rotatable.The present embodiment also regioselective ball 52 is as the second compressing member of spherical shape, second compressing member can remain that in spacing hole 44 curved surface towards the first compressed part thus forms the second compressed part, although i.e. place kick 52 may rotate, but the second compressed part is fixing relative to mounting seat 36 in fact.
Briquetting 72 is fixed one as the circular tube shaped assisted parts 78 of the first compressing member, a chamfer of assisted parts 78 towards one end of upper plate 4, forms wire annular end 782, and annular end 782 each point in the same plane, forms the first compressed part.And the diameter of annular end 782 is more than through hole 126 diameter, the area that the region area that each point encloses encloses more than or equal to through hole 126 peritreme, therefore can stably compress saw blade 1 shank 12.Briquetting 72 can with relative to annular end 782 place planar tilt direction near and away from the second compressed part, compression spring 92 promotes briquetting 72 with the direction being parallel to annular end 782 place plane, drives the first compressed part to press to the second compressing member top being perpendicular to annular end 782 place in-plane by briquetting 72.Wherein, the angle angle of the direction of briquetting 72 inclination movement and annular end 782 place in-plane it is still preferred that 10-15 °, especially 12 °.
It is additionally provided with in the middle part of upper plate 4 and accommodates the first compressing member wherein along long waist shaped hole 46 that is close and that move away from end plate 8 direction.
It is block that briquetting 72 is specially wedge shape, and lower surface 723 is parallel to upper plate 4 upper surface 42, and upper surface 729 is then obliquely installed relative to lower surface 723, thus forms the gradient convenient promotion briquetting 72 top pressure compression spring 92 to unclamp saw blade 1.
The chuck structure of the present embodiment is in use, it is not necessary to manually promoted to end plate 8 side by briquetting 72, but the shank 12 of saw blade 1 directly inserts cavity from insert port one end of saw blade seat.Shank 12 be close to upper plate 4 lower surface move time, the first compressing member of pressure briquetting 72 lower end can be pushed up, now it is connected with briquetting 72 due to the first compressing member, therefore, it is possible to automatically promote briquetting 72 to end plate 8 one lateral movement thus away from shank 12, make the shank 12 can fully-inserted saw blade seat, simultaneously the first compressing member compression spring 92 act under the most in turn top pressure saw blade 1 shank 12 in the second compressed part, thus realize clamping.During clamping, the one side 122 of shank 12 is fitted in the first compressed part, correspondence two seamed edge 124 of opposite side is pressed on corresponding one respectively simultaneously and ranked second in the second compressed part of compressing member.
It should be noted that, in above-described embodiment 1-4, first compressed part is that the upper surface 24 of upper plate 2 is i.e. in plane, in embodiment 5, the first compressed part is that annular end 782 is i.e. in wire, as long as but the present invention the first compressed part is made up of multiple points in the same plane, it is not limited to plane and plane interior lines shape, such as, can also is that the dot matrix in same plane.
The above is only the preferred embodiment of the present invention; it should be pointed out that, for those skilled in the art, on the premise of without departing from the technology of the present invention principle; can also make some improvement and deformation, these improve and deformation also should be regarded as protection scope of the present invention.