Boring clamp for brake bottom plate

Abstract

The utility model provides a brake bottom plate boring clamp, which relates to the technical field of tool clamps and comprises a clamp body, a hydraulic cylinder is arranged in the middle of the clamp body, support rods are fixedly arranged on the periphery of the clamp body, the upper ends of the support rods are fixedly connected with a mounting plate, a through hole is arranged on the mounting plate, and a positioning mandrel is mounted in the through hole in a guiding manner. The lower end of the positioning mandrel is fixedly connected with a piston rod of the hydraulic cylinder, a plurality of supporting cushion blocks are arranged on the portion, located on the periphery of the positioning mandrel, of the installation plate, a pressing corner air cylinder is further fixedly installed on the installation plate, a circumferential anti-rotation positioning screw is fixedly installed on the outer edge of the installation plate, and a plurality of circumferential jacking handles are further arranged on the outer edge of the installation plate. One-time clamping is adopted, machining of all holes can be completed, and the position degree requirement and the precision requirement of all the machined holes are met.

Description

Technical Field

[0001] The utility model relates to the technical field of tooling fixtures, in particular to a brake bottom plate boring fixture. Background Art

[0002] The brake base plate is a key component in the brake base plate assembly. It is a supporting part that fixes the brake shoe assembly and the brake drum assembly in the automobile brake and is the core of the vehicle's braking.

[0003] At present, the existing brake base plate first has its center hole precision-machined to the corresponding size, and then is positioned with the center hole. After positioning, boring and drilling of mounting holes are performed. Because the hole size on the base plate requires high precision, and after segmented processing, the hole position and accuracy cannot be guaranteed, there is no way to reduce the position error of the brake base plate hole. Summary of the invention

[0004] The utility model provides a brake base plate boring fixture to solve the problem that the hole position and accuracy of the existing brake base plate cannot be guaranteed after segmented processing, and there is no way to reduce the position error of the hole of the brake base plate.

[0005] In order to solve the technical problem, the utility model adopts the following technical scheme: a brake base plate boring fixture, including a clamping body, a hydraulic cylinder is arranged in the middle of the clamping body, support rods are fixedly arranged around the clamping body, the upper end of the support rod is fixedly connected to a mounting plate, a through hole is provided on the mounting plate, a positioning core shaft is guided and installed in the through hole, the lower end of the positioning core shaft is fixedly connected to the piston rod of the hydraulic cylinder, a plurality of supporting pads are provided on the mounting plate at the periphery of the positioning core shaft, a clamping angle cylinder is also fixedly installed on the mounting plate, a circumferential anti-rotation positioning screw is fixedly installed at the outer edge of the mounting plate, and a plurality of circumferential tightening handles are also provided at the outer edge of the mounting plate.

[0006] Furthermore, the lower end of the circumferential tightening handle is supported and connected to the mounting plate through a limit rod, and the circumferential tightening handle is threadedly connected to the upper end of the limit rod; the lower ends of the circumferential anti-rotation positioning screws are supported and connected to the mounting plate through a support rod, and the circumferential anti-rotation positioning screws are threadedly connected to the upper end of the support rod and tightened by a locking nut; this arrangement has a simple structure and is easy to manufacture and install.

[0007] Furthermore, the through hole of the mounting plate is provided with a positioning sleeve, and the positioning mandrel is installed with the positioning sleeve for guiding, so as to avoid the through hole of the mounting plate from being worn, and only the positioning sleeve needs to be replaced after being worn.

[0008] Furthermore, the positioning platform at the upper end of the positioning mandrel is a positioning platform with a circular chamfered edge, which reduces the contact area with the center hole of the brake base plate, avoids over-positioning, and facilitates the movement of the positioning mandrel.

[0009] Furthermore, the mounting plate is provided with auxiliary support screws; when boring the suspended position of the brake base plate, the auxiliary support screws act as auxiliary support screws for the bottom surface of the brake base plate to avoid vibration during boring.

[0010] The beneficial effects of the utility model are as follows: the utility model positions the brake base plate by means of a support pad and a positioning mandrel, and an active positioning mandrel is arranged on the clamp body, which is convenient for center positioning of the brake base plate and for boring the center hole of the brake base plate without interference, and the circumferential anti-rotation positioning screw and the circumferential tightening handle perform circumferential limitation and tightening of the brake base plate to prevent the brake base plate from rotating, and the clamping angle cylinder clamps the brake base plate, and can perform boring processing on the brake base plate at one time, thereby ensuring the position requirements and accuracy requirements of each hole of the brake base plate after processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of the utility model;

[0012] Figure 2 for Figure 1 AA section view along the middle (omitted Figure 1 Circumferential tightening handle in the lower right corner);

[0013] Figure 3 for Figure 1 Sectional view along BB (counterclockwise rotation);

[0014] Figure 4 It is a structural schematic diagram of the brake base plate involved in the utility model;

[0015] Figure 5 for Figure 4 CC section view along the middle edge;

[0016] Figure 6 This is a reference diagram for use in the present utility model.

[0017] In the figure: 1. clamping body, 2. hydraulic cylinder, 21. piston rod, 3. support rod, 4. mounting plate, 5. positioning mandrel, 51. positioning table, 52. positioning sleeve, 6. supporting pad, 7. pressing angle cylinder, 8. circumferential anti-rotation positioning screw, 9. circumferential tightening handle, 10. limiting rod, 11. auxiliary support screw, 12. support rod, 13. brake base plate. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0019] refer to Figure 1-Figure 5As shown, a brake base plate boring fixture comprises a clamping body 1, a hydraulic cylinder 2 is arranged in the middle of the clamping body 1, support rods 3 are fixedly arranged around the clamping body 1, the upper end of the support rod 3 is fixedly connected to a mounting plate 4, a through hole is provided on the mounting plate 4, a positioning core shaft 5 is guided and installed in the through hole, the lower end of the positioning core shaft 5 is fixedly connected to the piston rod 21 of the hydraulic cylinder 2, a plurality of supporting pads 6 are provided on the mounting plate 4 at the periphery of the positioning core shaft 5, a clamping angle cylinder 7 is also fixedly installed on the mounting plate 4, a circumferential anti-rotation positioning screw 8 is fixedly installed at the outer edge of the mounting plate 4, and a plurality of circumferential tightening handles 9 are also provided at the outer edge of the mounting plate.

[0020] like Figure 2 , Figure 3 As shown, further, the lower end of the circumferential tightening handle 9 is supported and connected to the mounting plate 4 through the limit rod 10, and the circumferential tightening handle 9 is threadedly connected to the upper end of the limit rod 10; the lower ends of the circumferential anti-rotation positioning screws 8 are supported and connected to the mounting plate 4 through 12, and the circumferential anti-rotation positioning screws 8 are threadedly connected to the upper end of the support rod 12 and tightened by a locking nut; this arrangement has a simple structure and is easy to manufacture and install.

[0021] like Figure 2 As shown, further, the through hole of the mounting plate 4 is provided with a positioning sleeve 52, and the positioning mandrel 5 is installed with the positioning sleeve 52 for guiding; to avoid wear of the through hole of the mounting plate 4, only the positioning sleeve 52 needs to be replaced after wear.

[0022] like Figure 1 , Figure 6 As shown, further, the positioning platform 5 at the upper end of the positioning mandrel 5 is a positioning platform with a circular chamfered edge; the contact area with the center hole of the brake base plate 13 is reduced to avoid over-positioning, which is beneficial to the movement of the positioning mandrel 5.

[0023] like Figure 2 As shown, further, the mounting plate 4 is provided with an auxiliary support screw 11; when boring the suspended position of the brake base plate 13, the bottom surface of the brake base plate 13 plays the role of an auxiliary support screw 11 to avoid vibration during boring.

[0024] The circumferential anti-rotation positioning screw of the utility model is arranged on the lower edge of the mounting plate, and is specifically installed on the left side or the right side of the mounting plate depending on the dominant hand of the operator.

[0025] Each hole of the brake bottom plate described in the utility model is roughly processed and has a margin.

[0026] Working principle of this utility model: Figure 6As shown, when the utility model is used, the hydraulic cylinder pushes the positioning core shaft 5 so that the positioning core shaft 5 is higher than the supporting pad 6, and the center hole of the brake base plate 13 is placed on the positioning core shaft 5. The circumferential anti-rotation positioning screw 8 limits the position of the brake base plate 13, and the circumferential tightening handle 9 presses the brake base plate 13. The tightening angle cylinder 7 presses the brake base plate 13. After the brake base plate 13 is fixed, the hydraulic cylinder 2 drives the positioning core shaft 5 to retract. After the positioning core shaft 5 retracts into place, the various hole positions of the brake base plate 13 are processed at one time.

[0027] Based on the above description, technicians with the necessary skills can make simple changes and modifications without departing from the technical concept of the present invention, which should fall within the protection scope of the present invention.

Claims

1. A brake base plate boring fixture, comprising a fixture body, characterized in that: A hydraulic cylinder is arranged in the middle of the clamping body, support rods are fixedly arranged around the clamping body, the upper end of the support rods is fixedly connected to a mounting plate, a through hole is arranged on the mounting plate, a positioning core shaft is guided and installed in the through hole, the lower end of the positioning core shaft is fixedly connected to the piston rod of the hydraulic cylinder, a plurality of supporting pads are arranged on the mounting plate on the periphery of the positioning core shaft, a clamping angle cylinder is also fixedly arranged on the mounting plate, a circumferential anti-rotation positioning screw is fixedly arranged at the outer edge of the mounting plate, and a plurality of circumferential tightening handles are also arranged at the outer edge of the mounting plate.

2. A brake base plate boring fixture according to claim 1, characterized in that: The lower end of the circumferential tightening handle is supported and connected to the mounting plate through a limit rod, and the circumferential tightening handle is threadedly connected to the upper end of the limit rod; the lower ends of the circumferential anti-rotation positioning screws are supported and connected to the mounting plate through a support rod, and the circumferential anti-rotation positioning screws are threadedly connected to the upper end of the support rod and tightened by a locking nut.

3. A brake base plate boring fixture according to claim 1 or 2, characterized in that: The through hole of the mounting plate is provided with a positioning sleeve, and the positioning mandrel is guided and installed with the positioning sleeve.

4. A brake base plate boring fixture according to claim 3, characterized in that: The positioning platform at the upper end of the positioning mandrel is a positioning platform with a circular chamfered edge.

5. A brake base plate boring fixture according to claim 4, characterized in that: Auxiliary supporting screws are arranged on the mounting plate.

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