CN216326542U

CN216326542U - Positioning fixture for milling of brake camshaft

Info

Publication number: CN216326542U
Application number: CN202122768802.5U
Authority: CN
Inventors: 潘向明
Original assignee: Lanxi Zhengang Auto Parts Co ltd
Current assignee: Lanxi Zhengang Auto Parts Co ltd
Priority date: 2021-11-12
Filing date: 2021-11-12
Publication date: 2022-04-19
Anticipated expiration: 2031-11-12

Abstract

The utility model discloses a positioning fixture for milling a brake camshaft, which comprises a base (1), wherein two adjusting devices are arranged on the base (1); each adjusting device is provided with an adjusting seat (2), and each adjusting seat (2) is provided with a clamping base (3); each clamping base (3) is provided with a bottom groove (4), and each bottom groove (4) is provided with a rubber layer (5), a moving through groove (6), a top piece (7) and a spring (8); first lifting cylinders (9) are arranged on two sides of the clamping base (3), and a clamping top seat (10) is arranged between the two first lifting cylinders (9); a clamping top seat (10) is provided with a top groove (11); a plurality of supporting seats (12) are arranged between the two adjusting devices. The utility model not only can improve the clamping stability, but also has the advantages of wide application range, convenient use, low production cost, high use flexibility, high use stability and long service life.

Description

Positioning fixture for milling of brake camshaft

Technical Field

The utility model relates to auxiliary equipment for processing a camshaft, in particular to a positioning clamp for milling a braking camshaft.

Background

In the production process of the camshaft, a key groove milling process needs to be carried out on the end part of the camshaft, and in the processing process, a clamp needs to be used for stably clamping and positioning the camshaft; but because be equipped with the cam of a plurality of different orientations on the camshaft, the shape of whole camshaft is irregular, leads to utilizing general anchor clamps to carry out the in-process that the centre gripping was fixed a position to the camshaft, needs adjustment incessantly, and it is stable to take place one end very easily, and another tip is unstable likes you to want, and holistic centre gripping stability is relatively poor. Therefore, the problem of poor clamping stability exists in the process of clamping and positioning the camshaft by using the existing clamp.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a positioning clamp for milling a brake camshaft.

The utility model has the characteristic of high clamping stability.

The technical scheme of the utility model is as follows: the positioning fixture for milling the brake camshaft comprises a base, wherein two symmetrically distributed adjusting devices are arranged on the top surface of the base; each adjusting device is provided with an adjusting seat, and the top surface of each adjusting seat is provided with a clamping base; the top surface of each clamping base is provided with a V-shaped bottom groove, and the inner side wall of each bottom groove is provided with a rubber layer; a movable through groove is formed in the middle of the bottom surface in each bottom groove, and a top piece is arranged in each movable through groove; the top surface of each top piece is provided with an anti-skid thread, and the bottom surface of each top piece is provided with a spring; first lifting cylinders are arranged on two sides of the clamping base, and clamping top seats located right above the clamping base are arranged between the top ends of the two first lifting cylinders; the bottom surface of the clamping top seat is provided with a V-shaped top groove; two be provided with a plurality of evenly distributed's supporting seat between the adjusting device, can support the camshaft through the supporting seat, avoid the phenomenon that the camshaft appears warping.

In the positioning fixture for milling the brake camshaft, the adjusting device comprises a ball screw for driving the adjusting seat to move, and the ball screw is connected with a servo motor; the two sides of the ball screw are provided with slide rails, and the two end parts of each slide rail are provided with limiting parts; a pressure sensor is arranged on the side surface of each limiting part facing to the two limiting parts and is electrically connected with the servo motor; the adjusting seat is slidably mounted between the two sliding rails.

In the positioning fixture for milling the brake camshaft, mounting grooves are formed in the top surface of the base at positions corresponding to the support seats, and a second lifting cylinder is arranged in each mounting groove; the supporting seat is arranged on the second lifting cylinder, and the top surface of the supporting seat is provided with an arc-shaped clamping groove; a plurality of rubber pads which are uniformly distributed are arranged on the inner wall of the clamping groove.

In the positioning fixture for milling the brake camshaft, a positioning cylinder is arranged on one side of the clamping base, which is far away from the supporting seat, and a positioning block is connected to the positioning cylinder; the end face of the positioning block is provided with a sucker.

In the positioning fixture for milling the brake camshaft, the two inner side walls of the top groove are provided with the protective layers.

Compared with the prior art, the clamp for processing the camshaft improves the existing clamp for processing the camshaft, and the two adjusting devices which are symmetrically distributed are arranged on the base, each adjusting device is provided with the clamping base and the clamping top seat, and the distance between the two clamping bases and the clamping top seats can be adjusted by using the adjusting devices, so that the clamp can be better suitable for positioning and clamping the camshafts with different lengths, and the application range is expanded; the V-shaped bottom groove and the V-shaped top groove are respectively arranged on the top surface of each clamping base and the bottom surface of each clamping top seat, so that the positioning and clamping device can be better suitable for positioning and clamping of camshafts with different sizes by utilizing the V-shaped structures; the top piece and the spring are matched and arranged on the bottom groove, the accommodating space of the bottom groove can be automatically adjusted by utilizing an adjusting structure which is formed by the top piece and the spring and can automatically rebound, so that the camshaft can be better attached in the bottom groove, and the anti-skidding threads on the top surface of the ejector pin enable the ejector pin to be better attached on the surface of the camshaft, so that the clamping stability is ensured; the rubber layer is arranged on the inner wall of the bottom groove, so that the cam shaft can be flexibly clamped by the rubber layer, the damage to the surface of the cam shaft in the clamping process is reduced, and the production cost is reduced; simultaneously, through being provided with a plurality of evenly distributed's supporting seat between two adjusting device, utilize the supporting seat to support the middle part of camshaft to prevent to produce the phenomenon of deformation because the span at both ends is too big in the course of working, guaranteed the processing effect. In addition, the adjusting device is composed of a ball screw and a servo motor, so that automatic adjustment is realized, and the use is convenient; the sliding rails are arranged on the two sides of the ball screw, so that the movement of the adjusting seat can be supported and guided by the sliding rails, and the limiting parts at the two end parts of the sliding rails are matched, so that the two end parts of the moving path of the adjusting seat can be limited, the phenomenon of over-head movement is avoided, and the use stability is improved; the second lifting cylinder is arranged on the supporting seat, the supporting seat can be driven to move up and down by the second lifting cylinder, and the supporting seats at different positions can be controlled to support by controlling the second lifting cylinders at different positions, so that the camshaft support device can adapt to camshaft support work in different modes, and the use flexibility is improved; the positioning cylinder is arranged on one side of the clamping base, the positioning block is arranged on the positioning cylinder, the sucker is arranged on the positioning block, and the positioning block can be used for positioning from two end parts of the camshaft, so that the positioning stability is improved; through being provided with the inoxidizing coating to protect the camshaft, prolonged life. Therefore, the clamping device not only can improve the clamping stability, but also has the advantages of wide application range, convenience in use, low production cost, high use flexibility, high use stability and long service life.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a top view of the present invention;

FIG. 3 is a side view of the adjustment block;

fig. 4 is a side view of the support base.

The labels in the figures are: 1-base, 2-adjusting base, 3-clamping base, 4-bottom groove, 5-rubber layer, 6-moving through groove, 7-top piece, 8-spring, 9-first lifting cylinder, 10-clamping top base, 11-top groove, 12-supporting base, 13-ball screw, 14-servo motor, 15-slide rail, 16-limiting piece, 17-pressure sensor, 18-mounting groove, 19-second lifting cylinder, 20-clamping groove, 21-rubber pad, 22-positioning cylinder, 23-positioning block, 24-suction cup and 26-protective layer.

Detailed Description

The utility model is further illustrated by the following figures and examples, which are not to be construed as limiting the utility model.

Examples are given. The positioning clamp for milling the brake camshaft comprises a base 1, wherein two adjusting devices which are symmetrically distributed are arranged on the top surface of the base 1; each adjusting device is provided with an adjusting seat 2, and the top surface of each adjusting seat 2 is provided with a clamping base 3; a V-shaped bottom groove 4 is formed in the top surface of each clamping base 3, and a rubber layer 5 is arranged on the inner side wall of each bottom groove 4; a movable through groove 6 is formed in the middle of the bottom surface in each bottom groove 4, and a top piece 7 is arranged in each movable through groove 6; the top surface of each top piece 7 is provided with an anti-skid thread, and the bottom surface of each top piece 7 is provided with a spring 8; the two sides of the clamping base 3 are both provided with first lifting cylinders 9, and a clamping top seat 10 which is positioned right above the clamping base 3 is arranged between the top ends of the two first lifting cylinders 9; a V-shaped top groove 11 is arranged on the bottom surface of the clamping top seat 10; a plurality of evenly distributed supporting seats 12 are arranged between the two adjusting devices.

The adjusting device comprises a ball screw 13 for driving the adjusting seat 2 to move, and the ball screw 13 is connected with a servo motor 14; slide rails 15 are arranged on two sides of the ball screw 13, and limiting pieces 16 are arranged at two ends of each slide rail 15; a pressure sensor 17 is arranged on the side surface of each limiting part 16 facing two limiting parts 16, and the pressure sensor 17 is electrically connected with the servo motor 14; the adjusting seat 2 is slidably mounted between the two sliding rails 15; mounting grooves 18 are formed in the positions, corresponding to the support seats 12, on the top surface of the base 1, and a second lifting cylinder 19 is arranged in each mounting groove 18; the supporting seat 12 is installed on the second lifting cylinder 19, and the top surface of the supporting seat 12 is provided with a circular arc-shaped clamping groove 20; a plurality of rubber pads 21 which are uniformly distributed are arranged on the inner wall of the clamping groove 20; a positioning cylinder 22 is arranged on one side of the clamping base 3 away from the supporting seat 12, and a positioning block 23 is connected to the positioning cylinder 22; a sucker 24 is arranged on the end surface of the positioning block 23; and protective layers 26 are arranged on the two inner side walls of the top groove 11.

The working principle is as follows: when the camshaft clamping device works specifically, the first lifting cylinder 9 is controlled to be started, and the first lifting cylinder 9 drives the clamping top seat 10 to move upwards after being started, so that the clamping top seat 10 and the clamping base 3 are separated from each other to fly, and a space is provided for placing a camshaft; then, the camshaft to be clamped and positioned is placed in the bottom grooves 4 of the two clamping bases 3, after the end portion of the camshaft is placed in the bottom grooves 4, the bottom end face of the camshaft is in contact with the ejecting piece 7, then the camshaft applies downward pressure to the ejecting piece 7, the ejecting piece 7 is pushed to move towards the base 1 in the moving through groove 6, the spring 8 is arranged at the bottom end portion of the ejecting piece 7, one end portion of the spring 8 is arranged on the inner bottom face of the moving through groove 6, the spring 8 is compressed in the moving process of the ejecting piece 7, and the spring 8 accumulates restoring force, so that when the camshaft is separated from the clamping bases 3, the ejecting piece 7 can return to the initial position; meanwhile, the bottom groove 4 is integrally V-shaped, so that the cam shaft can move back and continue to move downwards at a proper position to finish primary positioning; then the first lifting cylinder 9 is controlled to stop, the positioning cylinder 22 and the second lifting cylinder 19 are controlled to start, the first lifting cylinder 9 drives the clamping top seat 10 to move towards the clamping base 3 after stopping, finally the camshaft enters the top groove 11 on the clamping top seat 10, and the clamping top seat 10 and the clamping base 3 are matched with each other to clamp the upper position and the lower position of the camshaft; after the positioning cylinder 22 is started, the positioning block 23 is driven to move towards the clamping base 3, the sucking discs 24 are driven to move together in the moving process of the positioning block 23, finally the sucking discs 24 can be adsorbed at the two end parts of the camshaft, the front and rear positions of the camshaft can be fixed by the aid of the positioning blocks 23 on the two sides, and positioning stability is guaranteed; the same second lifting cylinder 19 can drive the supporting seat 12 to move upwards after being started, and finally the supporting seat 12 can be in contact with the bottom surface of the camshaft to support different positions of the camshaft, so that the phenomenon of deformation caused by large span between two ends of the camshaft in the subsequent processing process is avoided, unnecessary material waste is reduced while the subsequent processing effect is ensured, the production cost is reduced, and the whole clamping work is completed.

When the length of a camshaft needing clamping work is changed and the distance between two clamping bases 3 needs to be adjusted, a servo motor 14 is controlled to be started, the servo motor 14 can drive a ball screw 13 to rotate after being started, an adjusting base 2 can be driven to move along a sliding rail 15 in the rotating process of the ball screw 13, the clamping base 3 and a clamping top base 10 can be driven to move together in the moving process of the adjusting base 2, and after the distance between the two is adjusted to be a proper distance, the servo motor 14 is controlled to stop, so that the integral adjustment work is completed; when the adjusting seat 2 moves to the two end portions of the slide rail 15 and contacts with the limiting part 16, the pressure sensor 17 on the limiting part 16 sends an electric signal, and the servo motor 14 is controlled to stop emergently by an external controller according to the electric signal, so that the phenomenon of over-head movement is avoided; the rubber layer 5 on the bottom groove 4 and the protective layer 26 on the top groove 11 in the whole clamping process can form a buffer layer between the inner side walls of the camshaft and the clamping base 3 and the clamping top seat 10, so that the soft clamping of the camshaft is realized, the clamping damage to the camshaft is reduced, and the production cost is reduced.

Claims

1. Positioning fixture for milling of brake camshaft is characterized in that: comprises a base (1), wherein two adjusting devices which are symmetrically distributed are arranged on the top surface of the base (1); each adjusting device is provided with an adjusting seat (2), and the top surface of each adjusting seat (2) is provided with a clamping base (3); a V-shaped bottom groove (4) is formed in the top surface of each clamping base (3), and a rubber layer (5) is arranged on the inner side wall of each bottom groove (4); the middle part of the bottom surface in each bottom groove (4) is provided with a movable through groove (6), and a top piece (7) is arranged in each movable through groove (6); the top surface of each top piece (7) is provided with an anti-skid thread, and the bottom surface of each top piece (7) is provided with a spring (8); first lifting cylinders (9) are arranged on two sides of the clamping base (3), and a clamping top seat (10) located right above the clamping base (3) is mounted between the top ends of the two first lifting cylinders (9); a V-shaped top groove (11) is arranged on the bottom surface of the clamping top seat (10); a plurality of evenly distributed supporting seats (12) are arranged between the two adjusting devices.

2. The positioning fixture for milling the brake camshaft according to claim 1, characterized in that: the adjusting device comprises a ball screw (13) for driving the adjusting seat (2) to move, and the ball screw (13) is connected with a servo motor (14); slide rails (15) are arranged on two sides of the ball screw (13), and limiting pieces (16) are arranged at two end parts of each slide rail (15); a pressure sensor (17) is arranged on the side surface of each limiting part (16) facing to two limiting parts (16), and the pressure sensor (17) is electrically connected with the servo motor (14); the adjusting seat (2) is slidably mounted between the two sliding rails (15).

3. The positioning fixture for milling the brake camshaft according to claim 1, characterized in that: mounting grooves (18) are formed in the positions, corresponding to the supporting seats (12), on the top surface of the base (1), and a second lifting cylinder (19) is arranged in each mounting groove (18); the supporting seat (12) is installed on the second lifting cylinder (19), and the top surface of the supporting seat (12) is provided with a circular arc-shaped clamping groove (20); a plurality of rubber pads (21) which are uniformly distributed are arranged on the inner wall of the clamping groove (20).

4. The positioning fixture for milling the brake camshaft according to claim 1, characterized in that: a positioning cylinder (22) is arranged on one side of the clamping base (3) far away from the supporting seat (12), and a positioning block (23) is connected to the positioning cylinder (22); the end surface of the positioning block (23) is provided with a sucker (24).

5. The positioning jig for milling of a brake camshaft according to any one of claims 1 to 4, characterized in that: and protective layers (26) are arranged on the two inner side walls of the top groove (11).