CN214816771U

CN214816771U - Anti-eccentricity crank clamp

Info

Publication number: CN214816771U
Application number: CN202121680908.3U
Authority: CN
Inventors: 巫仕平; 李水生
Original assignee: Xiamen Litianxing Machinery Co ltd
Current assignee: Xiamen Litianxing Machinery Co ltd
Priority date: 2021-07-22
Filing date: 2021-07-22
Publication date: 2021-11-23
Anticipated expiration: 2031-07-22

Abstract

The utility model relates to an anti-eccentricity type crank fixture, which comprises a base, centering clamping mechanism, first centering post, second centering post and bed hedgehopping piece, the pedestal mounting is on the workstation of lathe, the bed hedgehopping piece is installed on the base, centering clamping mechanism demountable installation is on the bed hedgehopping piece, the screw thread section and the first mounting hole screw-thread fit of articulate of first centering post, press from both sides tight section clamping in centering clamping mechanism's clamping jaw, be provided with first grooving on the tight section of clamp, be convenient for first centering post and the first mounting hole between be connected or dismantle, the section of wearing to establish of second centering post wears to establish the cooperation with articulate second mounting hole, the stand section can be dismantled and be connected on the base plate, be provided with the second grooving on the stand section, be convenient for be connected or dismantle between second centering post and the base plate. This application has stable centre gripping disc type crank to effectively prevent the skew problem of disc type crank's disc axis and anchor clamps axis, ensure the final machining precision's of crank effect.

Description

Anti-eccentricity crank clamp

Technical Field

The application relates to the field of machining fixtures, in particular to an anti-eccentric crank fixture.

Background

The crank is a transmission member, and the disc crank is one type of crank for converting a linear motion of a connecting rod into a rotational motion, and generally includes a crank arm and a disc, one end of the crank arm is fixedly connected to the disc, a first mounting hole is formed at one side of the crank arm opposite to the disc, and a second mounting hole is formed at the other end of the crank on the same side as the first mounting hole.

In the existing disc type crank machining, precision machining is often required to be carried out around a disc axis, a first mounting hole of the disc type crank is generally installed on a clamp for machining, and if no disc is well matched with the clamp in the machining process, the disc axis is easy to deviate from the clamp axis, so that the machining precision is insufficient.

In view of the above-described related art, the inventors have considered that the disc crank machining jig has a problem that the disc axis is likely to deviate from the jig axis during machining.

SUMMERY OF THE UTILITY MODEL

In order to improve the problem that the crank takes place the disc axis easily and the skew of anchor clamps axis in course of working, this application provides an anti-decentration formula crank anchor clamps.

The application provides an anti-eccentric formula crank anchor clamps adopts following technical scheme.

An anti-eccentricity crank clamp comprising:

a base mounted on a table of a machine tool to be used as a support body;

the centering and clamping mechanism is arranged on the base and comprises a clamping jaw, a first centering column is clamped by the clamping jaw, and the first centering column is in threaded fit with a first mounting hole of a disc connected with a crank arm on a crank to be processed;

the upper end of the second centering column is in penetrating fit with a second mounting hole of the crank arm, which is far away from the disc;

through adopting above-mentioned technical scheme, set up centering clamping mechanism, first centering post one end and the first mounting hole screw-thread fit of articulate, the other end is installed in centering clamping mechanism's clamping jaw to this reaches the fixed purpose of the one end that is connected with the disc with the crank, sets up the second centering post and is used for wearing to establish the cooperation with articulate second mounting hole, with this reach the fixed purpose of the one end of keeping away from the disc with the crank.

Optionally, the method further includes:

the centering clamping mechanism comprises a plurality of heightening blocks, a base and a centering clamping mechanism, wherein the heightening blocks are arranged side by side, each heightening block is detachably arranged on the base, and the centering clamping mechanism is detachably arranged on each heightening block;

through adopting above-mentioned technical scheme, set up detachable bed hedgehopping piece, through selecting not unidimensional bed hedgehopping piece, make it be fit for treating processing articulate processing requirement, avoid leading to the machining precision problem because of anchor clamps height not parallel and level itself.

Optionally, the method further includes:

the two ends of each heightening block are respectively inserted with a first bolt, and the lower end of each first bolt penetrates through the heightening block and is in threaded connection with the base;

at least two second bolts are in threaded connection with each block, and each second bolt is inserted into and arranged on the centering and clamping mechanism;

through adopting above-mentioned technical scheme, set up first bolt and realize the connection between bed hedgehopping piece and the base, set up the second bolt and realize the connection between centering clamping mechanism and the bed hedgehopping piece.

Optionally, the centering and clamping mechanism is provided with:

the clamping grooves are formed in the outer wall of the centering and clamping mechanism, the clamping grooves are circumferentially and equidistantly distributed around the axis of the centering and clamping mechanism, and the upper ends of the clamping grooves are communicated with the upper surface of the centering and clamping mechanism;

through adopting above-mentioned technical scheme, set up the draw-in groove and be convenient for spanner joint in the draw-in groove, skid when avoiding spanner rotating centering clamping mechanism.

Optionally, the first centering column includes:

the clamping section is used for clamping the centering clamping mechanism;

the limiting section is arranged at the upper end of the clamping section, and the outer diameter of the limiting section is larger than the inner diameter of the first mounting hole;

the threaded section is arranged at the upper end of the limiting section and is in threaded connection with the first mounting hole;

through adopting above-mentioned technical scheme, set up the clamping section and be convenient for stably the clamping with first centering post in centering clamping mechanism, set up spacing section, when the clamping jaw is at the first centering post of clamping, spacing section supports and leans on the upper surface at centering clamping mechanism, sets up the screw thread section and makes first centering post and articulate first mounting hole can be stably connected.

Optionally, the first centering column is further provided with:

the clamping section comprises a plurality of first cutting grooves, a plurality of second cutting grooves and a plurality of clamping pieces, wherein the plurality of first cutting grooves are arranged on the outer wall of the clamping section, and are circumferentially arranged around the axis of the clamping section;

through adopting above-mentioned technical scheme, set up first tangential groove and be convenient for the spanner to support and lean on in order to rotate first centring post in each first tangential groove side, made things convenient for being connected or dismantling between first centring post and the first mounting hole of crank.

Optionally, the second centering column includes:

the lower end of the upright column section is fixedly connected with the base, and the outer diameter of the upright column section is larger than the inner diameter of the second mounting hole;

the penetrating section is arranged at the upper end of the upright column section and is in transition or clearance fit with the second mounting hole;

through adopting above-mentioned technical scheme, set up the stand section and provide the support of a take the altitude for connecting articulate second mounting hole, set up and wear to establish the section and wear to establish the second mounting hole of articulate to this fixed crank keeps away from the one end of disc.

Optionally, the method is characterized in that:

a threaded bolt body is fixed on the surface of the base and is in threaded connection with the second centering column;

through adopting above-mentioned technical scheme, set up the screw bolt body and with second centering post threaded connection on the surface of base for second centering post can stable connection on the base, has also made things convenient for the demountable installation of second centering post.

Optionally, the second centering column is provided with:

the second cutting groove is provided with a plurality of second cutting grooves, and the second cutting grooves are circumferentially arranged on the outer wall of the upright post section;

through adopting above-mentioned technical scheme, set up the second grooving and be convenient for the spanner to support and lean on each second grooving side with the rotatory second centering post, made things convenient for the connection or the dismantlement between second centering post and the base plate.

In summary, the present application includes at least one of the following beneficial technical effects:

the first centering column is in threaded connection with the first mounting hole of the crank, the first centering column is clamped in the centering clamping mechanism, and the second centering column is in penetrating connection with the second mounting hole of the crank, so that the disc type crank is stably mounted, the axis of the first mounting hole of the disc type crank is parallel to the axis of the second mounting hole, and the axis of the disc is effectively prevented from deviating from the axis of the clamp;

the first centering column comprises a clamping section, a limiting section and a threaded section, the clamping section is used for stably clamping the centering and clamping mechanism, the limiting section is used for limiting the clamping position of the first centering column, and the threaded section is in threaded fit with the first mounting hole of the crank, so that the first centering column and the first mounting hole of the crank are stably matched;

the first centering column is provided with a first cutting groove which is convenient for connection or detachment between the first centering column and the first mounting hole of the crank, and the second centering column is provided with a second cutting groove which is convenient for connection or detachment between the second centering column and the substrate.

Drawings

FIG. 1 is a schematic structural view of a disc crank;

FIG. 2 is a schematic view of the clamp structure and crank assembly of the present application;

FIG. 3 is a schematic view of the structure and assembly of a centering and clamping mechanism according to an embodiment of the present application;

FIG. 4 is a schematic view of the structure and assembly of a first centering post according to an embodiment of the present application;

fig. 5 is a schematic view of the structure and assembly of a second centering column according to an embodiment of the present application.

Reference numerals: 1. a base; 11. a threaded bolt body; 2. a centering and clamping mechanism; 21. an installation part; 211. a second bolt; 22. a connecting portion; 23. a clamping portion; 231. a clamping jaw; 232. a card slot; 3. a first centering column; 31. a clamping section; 311. a first cut groove; 32. a limiting section; 33. a threaded segment; 4. a second centering column; 41. a column section; 411. a second cut groove; 412. a fixing hole; 42. a section is arranged in a penetrating way; 5. a block for raising; 51. a first bolt; 6. a crank to be processed; 61. a crank arm; 611. a first mounting hole; 612. a second mounting hole; 62. a disk.

Detailed Description

The present application is described in further detail below with reference to figures 1-5.

The embodiment of the application discloses prevent eccentric formula crank anchor clamps. Referring to fig. 1, the eccentricity-preventing crank clamp is used for stably clamping a crank 6 to be machined, wherein the crank 6 to be machined comprises a crank arm 61 and a disc 62, specifically, one end of the crank arm 61 is fixedly connected with the disc 62, a first mounting hole 611 is formed in the side, opposite to the disc 62, of the crank arm 61, and a second mounting hole 612 is formed in the other end of the crank arm 61, on the same side of the first mounting hole 611.

Referring to fig. 2, the eccentricity-preventive crank jig includes a base 1, a centering-clamping mechanism 2, a first centering column 3, a second centering column 4, and a block-up block 5. Specifically, base 1 installs and uses as the holistic support subject of anchor clamps on the workstation of lathe, and bed hedgehopping piece 5 is provided with a plurality of side by side, and all detachable of each bed hedgehopping piece 5 install on base 1, and the both ends of each bed hedgehopping piece 5 are all inserted and are equipped with first bolt 51, and each lower extreme of saying first bolt 51 is worn to establish bed hedgehopping piece 5 and with base 1 threaded connection.

Referring to fig. 2 and 3, the centering-clamping mechanism 2 includes a mounting portion 21, a connecting portion 22, and a clamping portion 23. Specifically, the centering and clamping mechanism 2 is a clamping mechanism for simultaneously realizing centering, positioning and clamping of a workpiece, during the clamping process of the workpiece, the influence of inaccurate manufacturing of a positioning pair or deviation of positioning dimension on centering is eliminated by utilizing constant-speed movement or uniform elastic deformation of a positioning and clamping element, so that the errors or deviation can be uniformly and symmetrically distributed on a positioning reference surface of the workpiece, a plurality of second bolts 211 are arranged on an installation part 21, the lower end of each second bolt 211 penetrates through the installation part 21 and is in threaded connection with a heightening block 5, a connecting part 22 is fixedly connected above the installation part 21, a clamping part 23 is in threaded connection above the connecting part 22, the clamping part 23 comprises a clamping jaw 231, when the clamping part 23 is rotated, the clamping jaw 231 in the centering and clamping mechanism 2 is clamped or loosened, a plurality of clamping grooves 232 which are circumferentially arranged are arranged at the intersection of the outer side surface and the upper surface of the clamping part 23, the wrench is clamped in each clamping groove 232 so as to be convenient for rotating the centering and clamping mechanism 2 without slipping.

Referring to fig. 3 and 4, the first centering column 3 includes a clamping section 31, a stopper section 32, and a threaded section 33, and the to-be-machined crank 6 includes a crank arm 61 and a circular disc 62. Specifically, the clamping section 31 is configured to be inserted into the clamping jaw 231 to fix the first centering column 3, a plurality of first cutting grooves 311 are formed in an outer wall of the clamping section 31, each first cutting groove 311 is circumferentially arranged around an axis of the clamping section 31, the limiting section 32 is disposed at an upper end of the clamping section 31, an outer diameter of the limiting section 32 is larger than an inner diameter of the first mounting hole 611, the threaded section 33 is disposed at an upper end of the limiting section 32, and the threaded section 33 is in threaded connection with the first mounting hole 611 of the crank.

Referring to fig. 2 and 5, the second centering column 4 includes a column section 41 and a through section 42, and the threaded bolt 11 is fixed on the upper surface of the base 1. Specifically, a fixing hole 412 is formed in the lower end of the column section 41, the threaded bolt body 11 is in threaded connection with the fixing hole 412, connection between the second centering column 4 and the base 1 is achieved, the outer diameter of the column section 41 is larger than the inner diameter of the second mounting hole 612, a plurality of second slots 411 are formed in the outer wall of the column section 41, the second slots 411 are circumferentially arranged around the axis of the column section 41, the penetrating section 42 is arranged above the column section 41, the outer diameter of the penetrating section 42 is smaller than the outer diameter of the column section 41, and the penetrating section 42 is in transition fit or clearance fit with the second mounting hole 612.

The implementation principle of the anti-eccentric crank clamp provided by the embodiment of the application is as follows:

threaded section 33 through first centering post 3 threaded connection is in the first mounting hole 611 of crank, clamping section 31 inserts the clamping part 23 of locating centering clamping mechanism 2, realize that the crank is connected with the fixed of disc 62 one end, wear to establish section 42 and the second mounting hole 612 transition or clearance fit of crank through second centering post 4, realize the fixed of the crank other end, make disc 62 formula crank stable installation, thereby make the axis of disc 62 formula crank's first mounting hole 611 and the axis of second mounting hole 612 be parallel to each other, effectively avoid the crank to take place offset in the course of working and influence the machining precision.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. An anti-eccentricity crank clamp, comprising:

a base (1), wherein the base (1) is mounted on a workbench of a machine tool to be used as a support body;

the centering and clamping mechanism (2) is installed on the base (1), the centering and clamping mechanism (2) comprises a clamping jaw (231), a first centering column (3) is clamped by the clamping jaw (231), and the first centering column (3) is in threaded fit with a first installation hole (611) of a disc (62) connected with a crank arm (61) on a crank (6) to be machined;

the upper end of the second centering column (4) is matched with the crank arm (61) in a penetrating mode in a second mounting hole (612) formed in the position, far away from the disc (62), of the crank arm (61).

2. The anti-eccentricity crank clamp according to claim 1, further comprising:

the base is characterized by comprising a heightening block (5), wherein the heightening block (5) is provided with a plurality of pieces side by side, each heightening block (5) is detachably mounted on the base (1), and the centering clamping mechanism (2) is detachably mounted on each heightening block (5).

3. An anti-eccentricity crank clamp according to claim 2, wherein:

two ends of each heightening block (5) are respectively inserted with a first bolt (51), and the lower end of each first bolt (51) penetrates through the heightening block (5) and is in threaded connection with the base (1);

each block of the block (5) is connected with at least two second bolts (211) in a threaded manner, and each second bolt (211) is inserted into the centering and clamping mechanism (2).

4. An anti-eccentricity crank clamp according to claim 1, wherein the centering and clamping mechanism (2) is provided with:

the clamping grooves (232) are arranged on the outer wall of the centering and clamping mechanism (2), the clamping grooves (232) are circumferentially and equidistantly distributed around the axis of the centering and clamping mechanism (2), and the upper ends of the clamping grooves (232) are communicated with the upper surface of the centering and clamping mechanism (2).

5. An anti-eccentricity crank clamp according to claim 1, wherein the first centring post (3) comprises:

the clamping section (31) is used for clamping the centering clamping mechanism (2);

the limiting section (32) is arranged at the upper end of the clamping section (31), and the outer diameter of the limiting section (32) is larger than the inner diameter of the first mounting hole (611);

the threaded section (33) is arranged at the upper end of the limiting section (32), and the threaded section (33) is in threaded connection with the first mounting hole (611).

6. An anti-eccentricity crank clamp according to claim 4, wherein the first centring post (3) is further provided with:

the clamping device comprises a first cutting groove (311), wherein the first cutting groove (311) is provided with a plurality of cutting grooves, each cutting groove (311) is arranged on the outer wall of the clamping section (31), and the first cutting grooves (311) are circumferentially arranged around the axis of the clamping section (31).

7. An anti-eccentricity crank clamp according to claim 1, wherein the second centring post (4) comprises:

the lower end of the upright column section (41) is fixedly connected with the base (1), and the outer diameter of the upright column section (41) is larger than the inner diameter of the second mounting hole (612);

the wear-fit section (42) is arranged at the upper end of the column section (41), and the wear-fit section (42) and the crank arm (61) are in transition or clearance fit with each other far away from a second mounting hole (612) formed in the disc (62).

8. An anti-eccentricity crank clamp according to claim 6, wherein:

the surface of the base (1) is fixed with a threaded bolt body (11), and the threaded bolt body (11) is in threaded connection with the second centering column (4).

9. An anti-eccentricity crank clamp according to claim 7, wherein the second centring post (4) is provided with:

the second slot (411) is provided with a plurality of slots, and the second slots (411) are circumferentially arranged on the outer wall of the upright column section (41).