A kind of brake caliper piston hole machining positioning clamp

Abstract

The utility model discloses a kind of brake caliper piston hole processing positioning clamps, comprising: support frame;The device is by caliper one end is loaded into three grab holder one and leans on support plate lightly, hydraulic telescopic rod is pressed down, spring one synchronous buffer vibration absorption, so that caliper weight no longer forms "no support cantilever";Motor two drive screw two, drive moving plate and three grab holder two clamping other end, complete double side holding.Subsequently, motor one drives screw one to make moving block one transverse movement, realize punching transverse coarse positioning;Then along long rod push-pull moving block two, cooperate the elastic fine adjustment of compression spring, stretching spring, accurate front and back alignment, make up the deficiency of "lack front and back adjustment";If angle needs to be adjusted, only need to rotate adjusting wheel to be rotated by transmission box drive three grab holder one, positioning hole is always linked with adjusting plate in whole process, ensure that drill bit is always aligned with piston hole theoretical center, processing is stable, and repeat accuracy is high, significantly reduce artificial repeated dismounting burden.

Description

Technical Field

[0001] This utility model relates to the field of brake caliper piston hole processing technology, and more specifically, to a positioning fixture for processing brake caliper piston holes. Background Technology

[0002] Brake caliper piston hole machining refers to the process of machining a cylindrical inner hole for the reciprocating motion of the hydraulic piston on the cylinder of the brake caliper using drilling, boring, reaming, honing, and other techniques. This is a key process to ensure that the dimensional tolerances, surface roughness, and positional accuracy meet the requirements for sealing and braking performance.

[0003] A search revealed an existing patent (publication number: CN214816925U) that discloses an automatic piston pin hole machining and positioning device, including a base. A transmission box is fixedly connected to the center of one side of the top surface of the base, and a connecting shaft is rotatably connected to the center of one side of the transmission box. A transmission gear is fixedly connected to the middle of the connecting shaft, and a shaft clamp is fixedly connected to one end of the connecting shaft. The advantages of this invention are: by setting up a transmission box, a connecting shaft is rotatably connected to the center of one side of the transmission box, a transmission gear is fixedly connected to the middle of the connecting shaft, and a transmission worm is rotatably connected to the center of one side of the transmission box. The transmission worm and the transmission gear mesh with each other, allowing the user to rotate the first handwheel to drive the transmission worm to rotate. The transmission worm, through meshing with the transmission gear, can drive the shaft clamp to rotate, adjusting the position of the drilling surface. The worm gear transmission adjustment is more precise and has a self-locking effect, making adjustment and fixing more convenient and improving practicality.

[0004] In actual use, due to the large weight of the caliper and the lack of bottom support, it is held by a single-sided cantilever clamp of the shaft clamp. The entire caliper sags and the center of gravity shifts, causing the connecting bearing to be subjected to additional bending moment and causing the front end to wobble. At the same time, although the positioning hole can move up and down with the lifting plate, it lacks a front and rear fine adjustment mechanism. Once there are batch differences in the shape of the caliper or changes in the blank allowance, the positioning hole cannot be aligned with the theoretical axis of the piston hole. The caliper must be disassembled and reassembled for overall adjustment, which is both time-consuming and difficult to guarantee repeatability. Summary of the Invention

[0005] In order to overcome the above-mentioned defects of the prior art, this utility model provides a brake caliper piston hole machining positioning fixture to solve the problems of no support cantilever and lack of front and rear adjustment.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a brake caliper piston hole machining positioning fixture, comprising: a support frame; a caliper support buffer assembly mounted on the support frame, the caliper support buffer assembly being used to provide auxiliary support for the caliper; a drilling lateral position adjustment assembly mounted on the support frame, the drilling lateral position adjustment assembly being used to adjust the hole position laterally; a drilling front-to-back position adjustment assembly mounted on the drilling lateral position adjustment assembly, the drilling front-to-back position adjustment assembly being used to adjust the hole position vertically; a caliper rotation assembly mounted on the support frame, the caliper rotation assembly being used to fix the caliper and adjust the drilling angle; and an auxiliary clamping assembly mounted on the support frame, the auxiliary clamping assembly being used to provide auxiliary clamping for the caliper.

[0007] Preferably, the caliper support and buffer assembly includes: a hydraulic telescopic rod fixedly installed on the top of the support frame, a support plate fixedly installed on the top of the hydraulic telescopic rod, an installation block fixedly installed on the top of the support frame, a straight rod fixedly installed on one side of the installation block, and a movable block movably sleeved on the straight rod.

[0008] Preferably, the caliper support buffer assembly further includes: a spring movably mounted on the outer surface of the straight rod; a movable connecting rod movably mounted on the top of the movable block; the top of the movable connecting rod movably mounted on the bottom of the support plate; and two sets of movable blocks and movable connecting rods are provided, with the two sets of movable blocks and movable connecting rods symmetrically arranged on the straight rod.

[0009] Preferably, the drilling lateral position adjustment component includes: a motor fixedly installed on one side of the support frame; a lead screw and a limiting rod movably installed on the inner side of the support frame; the driving end of the motor is fixedly connected to one end of the lead screw; and a moving block is movably sleeved on the lead screw and the limiting rod.

[0010] Preferably, the drilling position adjustment assembly includes: a long rod fixedly installed on the first movable block, a compression spring movably sleeved on the outer surface of the long rod, a tension spring movably sleeved on the outer surface of the long rod, and a second movable block movably sleeved on the long rod.

[0011] Preferably, the drilling position adjustment assembly further includes: a limiting frame fixedly installed on one side of the moving block 2, an adjusting plate movably sleeved on the limiting frame, an adjusting hole provided on the adjusting plate, an adjusting bolt adjustablely installed on the adjusting hole, and a positioning hole provided at the front end of the adjusting plate.

[0012] Preferably, the caliper rotating assembly includes: a transmission box fixedly installed on the top of the support frame, an adjusting wheel movably installed on the transmission box, and a three-grip gripper fixedly installed on the transmission shaft of the transmission box.

[0013] Preferably, the auxiliary clamping assembly includes: a mounting plate fixedly installed on the top of the support frame; a second motor fixedly installed on one end of the mounting plate; a second lead screw movably installed on the inner side of the mounting plate; the driving end of the second motor fixedly connected to one end of the second lead screw; one end of the second lead screw movably connected to one side of the transmission box; a movable plate movably installed on the second lead screw; and a third-grip clamp movably installed on one side of the movable plate.

[0014] Compared with the prior art, the beneficial effects of this utility model are: This invention involves inserting one end of a caliper into a three-jaw gripper and gently resting it against a support plate. The hydraulic telescopic rod is pressed downwards, and a spring simultaneously buffers and absorbs vibrations, preventing the caliper's weight from creating a "cantilevered" effect. A second motor drives a second lead screw, pushing a moving plate to clamp the other end of the caliper with the third-jaw gripper, completing a double-sided grip. Subsequently, the first motor drives the first lead screw, causing the first moving block to move laterally, achieving rough lateral positioning for drilling. Then, pushing and pulling the second moving block along the long rod, combined with the elastic fine-tuning of the compression and tension springs, allows for precise front-to-back alignment, compensating for the lack of front-to-back adjustment. If angle adjustment is needed, simply rotating the adjusting wheel will drive the third-jaw gripper to rotate via the transmission box. Throughout the process, the positioning hole always moves in tandem with the adjusting plate, ensuring the drill bit is always aligned with the theoretical center of the piston hole, resulting in stable processing, high repeatability, and significantly reducing the burden of repeated manual disassembly and assembly. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the caliper support and buffer assembly structure of this utility model; Figure 3 This is a schematic diagram of the drilling lateral position adjustment component of this utility model; Figure 4 This is a schematic diagram of the hole-drilling front and rear position adjustment component of this utility model; Figure 5 This is a schematic diagram of the caliper rotating assembly and auxiliary clamping assembly of this utility model.

[0016] [Figure Labels] 1. Support frame; 2. Caliper support and buffer assembly; 3. Drilling lateral position adjustment assembly; 4. Drilling front and rear position adjustment assembly; 5. Caliper rotation assembly; 6. Auxiliary clamping assembly; 201. Hydraulic telescopic rod; 202. Support plate; 203. Mounting block; 204. Straight rod; 205. Movable block; 206. Spring 1; 207. Movable connecting rod; 301. Motor 1; 302. Lead screw 1; 303. Limiting rod; 304. Moving... Moving block 1; 401, long rod; 402, compression spring; 403, tension spring; 404, moving block 2; 405, limiting frame; 406, adjusting plate; 407, adjusting hole; 408, adjusting bolt; 409, positioning hole; 501, transmission box; 502, adjusting wheel; 503, three-grip gripper 1; 601, mounting plate; 602, motor 2; 603, lead screw 2; 604, moving plate; 605, three-grip gripper 2. Detailed Implementation

[0017] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this utility model. Example 1

[0018] A preferred embodiment of the brake caliper piston hole machining positioning fixture provided by this utility model is, for example... Figures 1 to 5 As shown, it includes: a support frame 1; a caliper support and buffer assembly 2 mounted on the support frame 1, which is used to provide auxiliary support for the caliper; a drilling lateral position adjustment assembly 3 mounted on the support frame 1, which is used to adjust the hole position laterally; a drilling front-to-back position adjustment assembly 4 mounted on the drilling lateral position adjustment assembly 3, which is used to adjust the hole position vertically; a caliper rotation assembly 5 mounted on the support frame 1, which is used to fix the caliper and adjust the drilling angle; and an auxiliary clamping assembly 6 mounted on the support frame 1, which is used to provide auxiliary clamping for the caliper.

[0019] In this embodiment, the caliper support buffer assembly 2 includes: a hydraulic telescopic rod 201 fixedly installed on the top of the support frame 1, a support plate 202 fixedly installed on the top of the hydraulic telescopic rod 201, an installation block 203 fixedly installed on the top of the support frame 1, a straight rod 204 fixedly installed on one side of the installation block 203, and a movable block 205 movably sleeved on the straight rod 204.

[0020] In this embodiment, the caliper support buffer assembly 2 further includes: a spring 206 movably mounted on the outer surface of the straight rod 204; a movable connecting rod 207 movably mounted on the top of the movable block 205; the top of the movable connecting rod 207 movably mounted on the bottom of the support plate 202; two sets of movable blocks 205 and movable connecting rods 207 are provided, and the two sets of movable blocks 205 and movable connecting rods 207 are symmetrically arranged on the straight rod 204.

[0021] In this embodiment, the drilling lateral position adjustment component 3 includes: a motor 301 fixedly installed on one side of the support frame 1; a lead screw 302 and a limiting rod 303 movably installed on the inner side of the support frame 1; the driving end of the motor 301 is fixedly connected to one end of the lead screw 302; and a moving block 304 is movably sleeved on the lead screw 302 and the limiting rod 303.

[0022] In this embodiment, the drilling position adjustment component 4 includes: a long rod 401 fixedly installed on the moving block 304, a compression spring 402 movably sleeved on the outer surface of the long rod 401, a tension spring 403 movably sleeved on the outer surface of the long rod 401, and a moving block 404 movably sleeved on the long rod 401.

[0023] In this embodiment, the drilling position adjustment component 4 further includes: a limiting frame 405 fixedly installed on one side of the moving block 404, an adjusting plate 406 movably sleeved on the limiting frame 405, an adjusting hole 407 opened on the adjusting plate 406, an adjusting bolt 408 adjustablely installed on the adjusting hole 407, and a positioning hole 409 opened at the front end of the adjusting plate 406.

[0024] A replaceable carbide shim 13 (material YG8, thickness 2 mm) is attached to the upper surface of the support plate 202 of the caliper support buffer assembly 2 and locked with two M4 hex socket head cap screws. When the surface of the support plate 202 is worn due to long-term machining of different models of calipers, the carbide shim 13 can be quickly replaced simply by loosening the screws, which protects the support plate 202 body and maintains the flatness of the support reference surface ≤0.01 mm. Example 2

[0025] Based on Embodiment 1, a preferred embodiment of the brake caliper piston hole machining positioning fixture provided by this utility model is as follows: Figures 1 to 5 As shown: The caliper rotating assembly 5 includes: a transmission box 501 fixedly installed on the top of the support frame 1, an adjusting wheel 502 movably installed on the transmission box 501, and a three-jaw gripper 503 fixedly installed on the transmission shaft of the transmission box 501.

[0026] In this embodiment, the auxiliary clamping assembly 6 includes: a mounting plate 601 fixedly installed on the top of the support frame 1; a motor 602 fixedly installed on one end of the mounting plate 601; a lead screw 603 movably installed on the inner side of the mounting plate 601; the driving end of the motor 602 fixedly connected to one end of the lead screw 603; one end of the lead screw 603 movably connected to one side of the transmission box 501; a movable plate 604 movably installed on the lead screw 603; and a three-grip gripper 605 movably installed on one side of the movable plate 604.

[0027] During operation, first insert one end of the caliper into the three-grip gripper 503 and gently rest it on the support plate 202. The hydraulic telescopic rod 201 is pressed down, and the spring 206 synchronously buffers and absorbs vibration, so that the weight of the caliper no longer forms a "cantilever without support". The motor 602 drives the lead screw 603 to push the moving plate 604 and the three-grip gripper 605 to clamp the other end, completing the double-sided gripping. Subsequently, motor 301 drives lead screw 302 to move moving block 304 laterally, achieving rough positioning of the hole. Then, moving block 404 is pushed and pulled along long rod 401, and with the elastic fine adjustment of compression spring 402 and tension spring 403, it can accurately align front and back, making up for the lack of front and back adjustment. If the angle needs to be adjusted, simply rotate adjusting wheel 502 to drive three-jaw gripper 503 to rotate through transmission box 501. Throughout the process, positioning hole 409 is always linked with adjusting plate 406 to ensure that the drill bit is always aligned with the theoretical center of piston hole, resulting in stable processing, high repeatability, and significantly reducing the burden of repeated manual disassembly and assembly.

[0028] A laser ranging module 7 (model optional LEUZE ODSL 96B) is added to the top of the support frame 1, and its signal output terminal is electrically connected to the external CNC system. When the caliper is clamped by the three-jaw gripper 503 and the three-jaw gripper 605, the laser ranging module 7 detects the height change of the support plate 202 in real time. The CNC system dynamically compensates for the extension and retraction of the hydraulic telescopic rod 201 accordingly, and always keeps the center of gravity of the caliper coaxial with the rotation center of the three-jaw gripper 503 and the three-jaw gripper 605, thereby controlling the "cantilever deformation" error within 0.02 mm.

[0029] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change. Secondly: The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other. Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A brake caliper piston bore machining positioning fixture, characterized by, include: Supporting framework (1); A caliper support buffer assembly (2) is mounted on the support frame (1), the caliper support buffer assembly (2) being used to provide auxiliary support for the caliper; A drilling lateral position adjustment assembly (3) is mounted on the support frame (1), the drilling lateral position adjustment assembly (3) is used to adjust the hole position laterally; A drilling front and rear position adjustment component (4) is mounted on the drilling horizontal position adjustment component (3), and the drilling front and rear position adjustment component (4) is used to vertically adjust the hole position; A caliper rotating assembly (5) is mounted on the support frame (1), the caliper rotating assembly (5) being used to fix the caliper and adjust the drilling angle; An auxiliary clamping assembly (6) is mounted on the support frame (1) for auxiliary clamping of the caliper.

2. The brake caliper piston hole machining positioning fixture according to claim 1, characterized in that, The caliper support buffer assembly (2) includes: A hydraulic telescopic rod (201) is fixedly installed on the top of the support frame (1). A support plate (202) is fixedly installed on the top of the hydraulic telescopic rod (201). An installation block (203) is fixedly installed on the top of the support frame (1). A straight rod (204) is fixedly installed on one side of the installation block (203). A movable block (205) is movably sleeved on the straight rod (204).

3. A positioning fixture for machining piston holes in a brake caliper according to claim 2, characterized in that, The caliper support buffer assembly (2) also includes: A spring (206) is movably installed on the outer surface of the straight rod (204). A movable connecting rod (207) is movably installed on the top of the movable block (205). The top of the movable connecting rod (207) is movably installed on the bottom of the support plate (202). There are two sets of movable blocks (205) and movable connecting rods (207), and the two sets of movable blocks (205) and movable connecting rods (207) are symmetrically arranged on the straight rod (204).

4. A positioning fixture for machining piston holes in a brake caliper according to claim 3, characterized in that, The drilling lateral position adjustment component (3) includes: A motor (301) is fixedly installed on one side of the support frame (1). A lead screw (302) and a limiting rod (303) are movably installed on the inner side of the support frame (1). The driving end of the motor (301) is fixedly connected to one end of the lead screw (302). A moving block (304) is movably sleeved on the lead screw (302) and the limiting rod (303).

5. A positioning fixture for machining piston holes in a brake caliper according to claim 4, characterized in that, The pre- and post-drilling position adjustment assembly (4) includes: A long rod (401) is fixedly installed on the first movable block (304). A compression spring (402) is movably sleeved on the outer surface of the long rod (401). A tension spring (403) is movably sleeved on the outer surface of the long rod (401). A second movable block (404) is movably sleeved on the long rod (401).

6. A positioning fixture for machining piston holes in a brake caliper according to claim 5, characterized in that, The pre- and post-drilling position adjustment assembly (4) also includes: A limiting frame (405) is fixedly installed on one side of the movable block two (404). An adjusting plate (406) is movably sleeved on the limiting frame (405). An adjusting hole (407) is provided on the adjusting plate (406). An adjusting bolt (408) is adjustablely installed on the adjusting hole (407). A positioning hole (409) is provided at the front end of the adjusting plate (406).

7. A positioning fixture for machining piston holes in a brake caliper according to claim 1, characterized in that, The caliper rotating assembly (5) includes: A transmission box (501) is fixedly installed on the top of the support frame (1). An adjusting wheel (502) is movably installed on the transmission box (501). A three-grip gripper (503) is fixedly installed on the transmission shaft of the transmission box (501).

8. A positioning fixture for machining piston holes in a brake caliper according to claim 1, characterized in that, The auxiliary clamping component (6) includes: A mounting plate (601) is fixedly installed on the top of the support frame (1). A motor (602) is fixedly installed on one end of the mounting plate (601). A lead screw (603) is movably installed on the inner side of the mounting plate (601). The driving end of the motor (602) is fixedly connected to one end of the lead screw (603). One end of the lead screw (603) is movably connected to one side of the transmission box (501). A movable plate (604) is movably installed on the lead screw (603). A three-grip gripper (605) is movably installed on one side of the movable plate (604).

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