CN211028419U

CN211028419U - Gear clamp wide in clamping range

Info

Publication number: CN211028419U
Application number: CN201922252754.7U
Authority: CN
Inventors: 白庆平
Original assignee: Ganzhou Chuangyu Electromechanical Co ltd
Current assignee: Ganzhou Chuangyu Electromechanical Co ltd
Priority date: 2019-12-16
Filing date: 2019-12-16
Publication date: 2020-07-17
Anticipated expiration: 2029-12-16

Abstract

The utility model relates to a frock clamp field provides a gear clamp that centre gripping scope is wide. Including circular chassis, the centre on chassis is rotated and is connected with the pivot, the pivot has connected gradually cam and carousel from bottom to top, the upper end of pivot still is equipped with the external screw thread, external screw thread connection has lock nut, cam lateral wall roll connection has three cylindrical slave rotor, every slave rotor's centre all rotates and is connected with the push rod, the top of push rod is fixed with the slide, and the push rod moves along the spout that the carousel set up, the spout is provided with the spring that is in compression state in the motion line of push rod, the slide upper surface is equipped with multiunit installation reservation screw hole, the upper surface of slide all has a jack catch through the fix with screw. The utility model discloses an anchor clamps centre gripping wide range, the centre gripping precision is high.

Description

Gear clamp wide in clamping range

Technical Field

The utility model relates to a frock clamp field, in particular to gear clamp that centre gripping range is wide.

Background

Gear refers to a mechanical element on a rim with gears continuously engaged to transmit motion and power. The gear is divided into an external gear and an internal gear according to the surface where the gear teeth are located. In the actual production process, the external gear and the internal gear are generally clamped and fixed by different clamps. And the sizes of the gears are more, so gear processing enterprises generally need to prepare a plurality of gear processing clamps, which causes a certain waste of resource and fund.

The gear is firstly fixed and then machined by hobbing or gear shaping and the like. The common gear fixing is that the center shaft hole of the gear is arranged or the tops are arranged on two sides of the center of the gear, the center shaft hole of the gear is easy to cause certain damage to the shaft hole, the assembly precision is affected, and the method that the tops are arranged on two sides is difficult to position and easy to generate errors.

Therefore, the industry urgently needs a clamp which has the advantages of wide clamping range as far as possible, accurate positioning precision and no damage to the gear due to the clamping force of the clamp.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a gear clamp that centre gripping scope is wide, the limited problem of gear clamp centre gripping scope, the more problem of anchor clamps quantity kind, the not enough problem of anchor clamps positioning accuracy in the mainly used solution gear machining process.

The above technical problem of the present invention can be solved by the following technical solutions: including circular chassis, the centre on chassis is rotated and is connected with the pivot, the pivot has cam and carousel up having connected gradually from bottom to top, the upper end of pivot still is equipped with the external screw thread, external screw thread connection has lock nut, cam lateral wall roll connection has three cylindrical slave cell, every slave cell's centre all rotates and is connected with the push rod, the top of push rod is fixed with the slide, just the push rod along the spout motion that the carousel set up, the spout is in be provided with the spring that is in compression state in the motion line of push rod, the slide upper surface is equipped with multiunit installation and reserves the screw hole, the upper surface of slide all has a jack catch through the fix with screw.

Preferably, the outer side of each clamping jaw is in an outer convex arc shape, and the inner side of each clamping jaw is in an inner concave arc shape. The arc-shaped structure enables the contact surface of the clamp and the gear to have no edges and corners, the gear cannot be damaged, meanwhile, the contact area can be increased, and the tangential friction force is increased.

Preferably, the outer side edge of the chassis is provided with a sleeve, a top cover groove is formed in the inner side of the top end of the sleeve, a plurality of positioning columns are further arranged on the top cover groove, a top cover is placed on the top cover groove, positioning grooves matched with the positioning columns are formed in the top cover, a plurality of countersunk bolt holes are formed in the top cover, threaded holes corresponding to the countersunk bolt holes are formed in the chassis, and the top cover is fixed on the chassis through bolts. The positioning column arranged on the top cover groove and the positioning groove arranged on the top cover can assist the mounting accuracy of the top cover. Meanwhile, due to the arrangement of the top cover, cutting chips generated during machining can be prevented from entering between the cam and the driven part, so that the mechanism is abraded, and finally, positioning deviation is caused.

Preferably, the chassis is provided with a plurality of mounting prepared holes. The whole fixture and the machine tool are mounted in two ways, one way is to fix the mounting preformed hole formed in the base plate on the working table of the machine tool, or to set the bottom of the rotating shaft to exceed the bottom of the base plate, and then to fix the rotating shaft on the main spindle box of the machine tool to fix the whole fixture.

Preferably, the upper end of the rotating shaft is provided with a plurality of rotation force-bearing holes, and the lock nut is also provided with a plurality of rotation force-bearing holes. The rotation force receiving hole is provided to facilitate locking and loosening of the lock nut.

Preferably, the cam is of an axisymmetric configuration. The cam with the symmetrical structure can ensure the motion synchronization of the driven part, thereby ensuring the positioning precision of the clamping jaws.

The utility model has the advantages that: on one hand, the movement of the cam in the clamp can provide a clamping space in a certain range, on the other hand, the mounting position between the clamping jaw and the sliding plate of the clamp can be adjusted to adjust the clamping space of the clamp, and finally, the structure of the clamping jaw can be adjusted to further adjust the clamping range, so that the clamping range of the whole clamp is wider than that provided by the clamp in the prior art. And the axisymmetric cam ensures the motion synchronization of the clamping jaws, thereby ensuring the clamping precision of the whole clamp.

Drawings

Fig. 1 is a cross-sectional view of the present invention;

fig. 2 is an axial side view of the present invention;

fig. 3 is a top view of the present invention;

fig. 4 is a top view of the present invention;

fig. 5 is a bottom view of the present invention;

the notation in the figure is:

1. the novel rotary table comprises a base plate, 101, mounting preformed holes, 102, threaded holes, 103, a top cover groove, 104, positioning columns, 105, a sleeve, 2, a cam, 3, a driven rotor, 4, a push rod, 5, a sliding plate and 501, mounting preformed threaded holes, 6, a rotary table, 601, a sliding groove, 7, a clamping jaw, 8, a rotating shaft, 801, external threads, 9, a rotary stress hole, 10, a locking nut, 11, a top cover, 1101, a countersunk head bolt hole, 1102, a positioning groove and 12 springs.

Detailed Description

The technical solution of the present invention is further specifically described below by way of examples and with reference to the accompanying drawings.

Example (b): the gear clamp with wide clamping range comprises a circular base plate (1), a rotating shaft (8) is rotatably connected in the middle of the base plate (1), a cam (2) and a rotary table (6) are sequentially connected to the rotating shaft (8) from bottom to top, an external thread (801) is further arranged at the upper end of the rotating shaft (8), a locking nut (10) is spirally connected outside the external thread (801), three cylindrical slave rotors (3) are connected to the outer side wall of the cam (2) in a rolling manner, a push rod (4) is rotatably connected in the middle of each slave rotor (3), a sliding plate (5) is fixed at the top end of each push rod (4), each push rod (4) moves along a sliding groove (601) formed in the rotary table (6), a spring (12) in a compression state is arranged in a moving line of each push rod (4) in each sliding groove (601), and a plurality of groups of installation reserved threaded holes (501), the upper surface of the sliding plate (5) is fixed with a claw (7) through a screw. The outer side of the clamping jaw (7) is in an outer convex arc shape, the inner side of the clamping jaw (7) is in an inner concave arc shape, and the inner side of the clamping jaw (7) is in an inner concave arc shape.

Be equipped with sleeve (105) at the outside edge on chassis (1), the top inboard of sleeve (105) is equipped with top cap groove (103), still be equipped with a plurality of reference columns (104) on top cap groove (103), top cap (11) have been placed on top cap groove (103), be equipped with constant head tank (1102) that matches with the reference column on top cap (11), and be equipped with a plurality of countersunk head bolt holes (1101) on top cap (11), set up screw hole (102) for with countersunk head bolt hole (1101) on chassis (1), top cap (11) are fixed in chassis (1) through the bolt. Positioning column (104) that sets up on top cap groove (103) and constant head tank (1102) that set up on top cap (11) assist top cap (11) to carry out accurate installation to countersunk bolt hole (1101) that sets up on top cap (11) and the screw hole that sets up on chassis (1) correspond.

When the clamp is used, the top cover (11) is opened firstly, bolts penetrate through the mounting reserved holes (101) formed in the base plate (1), the base plate (11) of the clamp is mounted on the working table surface of a machine tool, then the positioning grooves (1102) in the top cover (11) are aligned to the positioning columns (104) in the top cover grooves (103), and then the bolts penetrate through the countersunk bolt holes (1101) to mount and fix the top cover (11) on the sleeve (105). And then clamping the gear workpiece.

When a workpiece is clamped, a tool is inserted into a rotating stress hole (9) of a rotating shaft (8) to rotate a clamping jaw (7) to the innermost side, then the clamping jaw (7) is sleeved with the inner diameter of a workpiece gear, then a tool is inserted into the rotating stress hole (9) of a locking nut (10), the two tools rotate in opposite directions, and when the clamping jaw (7) is screwed out to tightly push against the inner diameter of the gear, the locking nut (10) synchronously and slowly locks the rotating shaft (8), so that the purpose of fixing the gear is achieved. And because the symmetrical structure of the cam (2), the motion of the well-taught clamping jaw (7) can be synchronized, so that the concentricity of gear clamping is ensured.

After the processing is finished, two tools are respectively inserted into the rotating force bearing holes (9) of the rotating shaft (8) and the locking nut (10), and the locking nut (10) is loosened by exerting force in the opposite direction of the locking process. At the moment, a spring (12) in the sliding groove (601) synchronously acts a thrust on the push rod (4) to enable the push rod (4) to move towards the central shaft direction of the clamp, and the sliding plate (5) at the upper end of the push rod (4) also drives the clamping jaws (7) to move towards the central shaft direction of the clamp, so that the purpose of loosening workpieces is achieved.

The utility model provides a jack catch (7) are adjustable with the mounted position of slide (5), when being located inboard jack catch (7) and still can not be during the work piece gear of very abundant centre gripping when moving extreme position, can install jack catch (7) in installation reservation screw hole (501) in the outside of slide (5) to reach the purpose that enlarges the centre gripping scope. And the structure of the clamping jaw (7) can be adjusted and customized, so that the main structure of the existing clamp can be utilized to the maximum extent, the other main structures of the clamp are not required to be matched and customized, and investment can be saved for enterprises.

The present embodiment is only an exemplary embodiment of the present invention, and for those skilled in the art, based on the application method and principle disclosed in the present invention, various modifications or variations can be easily made, and not only limited to the structure described in the above embodiments of the present invention, therefore, the manner described in the foregoing is only a preferred embodiment, but not limiting, and all equivalent changes and modifications made according to the present invention are within the scope of the present invention.

Claims

1. The utility model provides a gear clamp that centre gripping scope is wide, includes circular chassis (1), its characterized in that, the centre on chassis (1) is rotated and is connected with pivot (8), pivot (8) have connected gradually cam (2) and carousel (6) from bottom to top, the upper end of pivot (8) still is equipped with external screw thread (801), external screw thread (801) external screw thread are connected with lock nut (10), cam (2) lateral wall roll connection has three cylindrical slave cell (3), the centre of every slave cell (3) all rotates and is connected with push rod (4), the top of push rod (4) is fixed with slide (5), just push rod (4) along spout (601) motion that carousel (6) set up, spout (601) are in be provided with spring (12) in compression state in the motion line of push rod (4), the upper surface of the sliding plate (5) is provided with a plurality of groups of mounting reserved threaded holes (501), and the upper surface of the sliding plate (5) is fixed with a clamping jaw (7) through a screw.

2. The gear clamp with the wide clamping range according to claim 1, wherein the outer side of the clamping jaw (7) is in the shape of an outer convex circular arc, and the inner side of the clamping jaw (7) is in the shape of an inner concave circular arc.

3. The gear clamp with the wide clamping range according to claim 1, wherein a sleeve (105) is arranged on the outer side edge of the chassis (1), a top cover groove (103) is arranged on the inner side of the top end of the sleeve (105), a plurality of positioning columns (104) are further arranged on the top cover groove (103), a top cover (11) is placed on the top cover groove (103), a positioning groove (1102) matched with the positioning columns is formed in the top cover (11), a plurality of countersunk bolt holes (1101) are formed in the top cover (11), threaded holes (102) corresponding to the countersunk bolt holes (1101) are formed in the chassis (1), and the top cover (11) is fixed on the chassis (1) through bolts.

4. The gear clamp with the wide clamping range according to claim 1, characterized in that the chassis (1) is provided with a plurality of mounting prepared holes (101).

5. The gear clamp with the wide clamping range as claimed in claim 1, wherein the upper end of the rotating shaft (8) is provided with a plurality of rotation stress holes (9), and the locking nut is also provided with a plurality of rotation stress holes (9).

6. A wide clamping range gear clamp as claimed in claim 1, wherein the cam (2) is of axisymmetric configuration.