Brake circlip installation device and installation method

Abstract

The present invention discloses a brake retaining spring installation device and an installation method, wherein the installation device comprises a stepped limit shaft with a larger diameter at the top and a smaller diameter at the bottom, a through hole being radially penetrated through the upper part of the limit shaft, and a pin shaft for facilitating the operation of the limit shaft being arranged in the through hole; a small clearance is formed between the large-diameter upper shaft at the upper part of the limit shaft and the inner wall of the brake piston, and a small clearance is also formed between the small-diameter lower shaft at the lower part of the limit shaft and the inner wall of the brake adjuster sleeve; a retaining spring clamping groove penetrating the shaft body is axially provided on the side surface of the upper shaft at the upper part of the limit shaft; a circular groove-shaped cavity which is inserted into the small sleeve opening at the upper part of the brake adjuster sleeve is upwardly provided at the connection between the upper shaft and the lower shaft of the limit shaft; the present invention can quickly complete the assembly of the brake piston and the retaining spring while ensuring the coaxiality between various components during the installation process.

Description

Technical Field

[0001] The invention relates to the technical field of brake piston retaining spring assembly, and in particular to a brake retaining spring installation device. Background Art

[0002] The brake is a device that has the function of slowing down, stopping or keeping moving parts in a stopped state. Figure 3 As shown, it includes a piston 3, a retaining ring groove is provided on the middle inner wall of the inner cavity of the piston 3, and a retaining ring 4 is clamped in the retaining ring groove; an adjuster sleeve 7, a spring 6 and a washer 5 are provided in the inner cavity of the piston 3 below the retaining ring 4, the spring 6 is located in the gap between the adjuster sleeve 7 and the inner wall of the piston 3, and the washer 5 is located above the spring 6 and is limited by the retaining ring 4. The retaining ring in the brake is one of the important components of the brake, and plays an important role in limiting and fixing the working part inside the brake piston cavity.

[0003] During the assembly of the brake piston assembly, it is generally difficult to ensure the coaxiality between the brake piston and the adjuster sleeve, which leads to eccentricity when pressing the retaining ring into the retaining ring groove, affecting the use effect of the brake, and easily damaging the inner wall of the piston, reducing the service life of the workpiece. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a brake retaining spring installation device and installation method, which can ensure the coaxiality between various components during the installation process while quickly completing the assembly work of the brake piston and the retaining spring.

[0005] In order to solve the above technical problems, the technical solutions adopted by the present invention are as follows.

[0006] A brake retaining spring installation device includes a stepped limit shaft with a larger diameter at the top and a smaller diameter at the bottom. A through hole is radially penetrated through the upper part of the limit shaft, and a pin shaft is installed in the through hole to facilitate the operation of the limit shaft. A small gap is formed between the large-diameter upper shaft at the upper part of the limit shaft and the inner wall of the brake piston, and a small gap is also formed between the small-diameter lower shaft at the lower part of the limit shaft and the inner wall of the brake adjuster sleeve.

[0007] The above-mentioned brake retaining ring installation device has a retaining ring clamping groove axially opened on the upper shaft side surface at the upper part of the limiting shaft and penetrating the shaft body, the retaining ring clamping groove opened on the side surface of the limiting shaft is aligned with the clamping hole set on the brake retaining ring located at the bottom end surface of the upper shaft, and the retaining ring pliers extend along the retaining ring clamping groove into the clamping hole on the retaining ring to clamp the retaining ring.

[0008] In the above-mentioned brake retaining spring installation device, a recessed circular groove-shaped cavity is opened upward at the connection between the upper shaft and the lower shaft of the limit shaft; a small sleeve opening is provided on the upper part of the adjuster sleeve of the brake and is inserted into the circular groove-shaped cavity during assembly, and the depth of the circular groove-shaped cavity is greater than the height of the small sleeve opening on the upper part of the adjuster sleeve.

[0009] A method for installing a brake retaining spring, using the above-mentioned installation device for installation, specifically comprises the following steps:

[0010] A. First, pass the pin through the through hole on the limit shaft and assemble it with the limit shaft to complete the assembly of the installation device;

[0011] B. Then lay the regulator sleeve, spring and washer into the inner cavity of the piston in order from bottom to top; then place the circlip horizontally at the opening of the inner cavity of the piston, and put the lower shaft of the limit shaft in the installation device through the circlip and into the inner cavity of the piston, and at the same time align the circlip clamping groove set on the limit shaft with the clamping hole set on the circlip; then extend the circlip pliers downward along the circlip clamping groove set on the limit shaft into the clamping hole on the circlip to tighten the circlip, and at the same time apply downward pressure to allow the circlip to enter the inner cavity of the piston;

[0012] C. After the circlip enters the inner cavity of the piston, withdraw the circlip pliers and continue to press the limit shaft downward so that the small sleeve opening on the upper part of the regulator sleeve enters the circular groove cavity of the limit shaft, and at the same time, the lower shaft at the lower part of the limit shaft enters the inner cavity of the regulator sleeve and forms a small clearance fit;

[0013] D. Then continue to press the installation device downward to ensure that the upper shaft of the limit shaft can enter the inner cavity of the piston and form a clearance fit with the inner wall of the piston;

[0014] F. When the circlip is pressed down until it reaches the circlip groove, the diameter of the circlip groove becomes larger, and the clamping constraint force of the inner wall of the piston on the circlip disappears, and the circlip will automatically open and get stuck in the circlip groove. At this time, the spring in the inner cavity of the piston is in a compressed state;

[0015] G. After the retaining ring is inserted into the retaining ring groove, the pin in the handheld installation device is pulled upward from the inner cavity of the piston. The spring automatically rebounds under the action of the reverse compression force, and at the same time drives the adjuster sleeve and the washer to rebound to the position of the retaining ring groove. The retaining ring above the washer fixes the adjuster sleeve, spring and washer in the piston. At this point, the installation of the internal parts of the piston and the retaining ring is completed.

[0016] Due to the adoption of the above technical scheme, the technical progress achieved by the present invention is as follows.

[0017] The present invention provides a brake retaining spring installation device with a simple structure and easy operation. It can ensure the coaxiality between various components during the installation process and quickly complete the assembly of the brake piston and the retaining spring, thereby avoiding subsequent damage to the inner wall of the piston and increasing the service life of the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the specific structure of the present invention;

[0019] Figure 2 It is a schematic diagram of assembling the brake retaining spring of the present invention;

[0020] Figure 3 This is a cross-sectional view of the brake circlip installation structure.

[0021] Among them: 1. limit shaft, 11. upper shaft, 12. lower shaft, 13. clamping groove of retaining ring, 14. circular groove cavity, 2. pin shaft, 3. piston, 4. retaining ring, 41. clamping hole, 5. washer, 6. spring, 7. adjuster sleeve, 71. small sleeve mouth. DETAILED DESCRIPTION

[0022] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] A brake spring mounting device, such as Figures 1 to 3 As shown, it includes a stepped limiting shaft 1 with a larger diameter at the top and a smaller diameter at the bottom. A through hole is radially penetrated through the upper part of the limiting shaft 1, and a pin shaft 2 is installed in the through hole to facilitate the operation of the limiting shaft 1.

[0024] The outer diameter of the upper shaft 11 at the upper part of the limit shaft 1 is smaller than the inner diameter of the piston 3 of the brake, so that the upper shaft 11 can be inserted into the inner cavity of the piston 3 to form a small gap with the inner wall of the piston 3, thereby avoiding eccentricity due to low coaxiality during assembly. The outer diameter of the small-diameter lower shaft 12 at the lower part of the limit shaft 1 is smaller than the inner diameter of the adjuster sleeve 7 of the brake, and the lower shaft 12 is inserted downward into the inner cavity of the adjuster sleeve 7 and forms a small gap between the inner wall of the adjuster sleeve 7 during assembly.

[0025] A circular groove-shaped cavity 14 which is concave upward is provided at the connection between the upper shaft 11 at the upper part of the limiting shaft 1 and the lower shaft 12 at the lower part. Figure 1 As shown, the outer wall diameter of the circular groove cavity 14 is larger than the outer diameter of the small sleeve opening 71 on the regulator sleeve 7. During assembly, as the installation device moves downward, the small sleeve opening 71 on the regulator sleeve 7 is inserted into the circular groove cavity 14. Figure 3 As shown, the coaxiality between the piston 3 and the regulator sleeve 7 is ensured.

[0026] A retaining spring clamping groove 13 penetrating the shaft body is axially opened on the side of the large-diameter upper shaft 11 at the upper part of the limiting shaft 1. Figure 2As shown, during assembly, the retaining spring 4 is arranged at the inner cavity opening of the piston 3, the upper end surface of the retaining spring 4 contacts the bottom end surface of the upper shaft 11 of the limiting shaft 1, the retaining spring clamping groove 13 arranged on the limiting shaft 1 is aligned with the clamping hole 41 on the retaining spring 4, and the retaining spring clamping groove 13 opened along the side of the upper shaft 11 of the retaining spring pliers extends into the clamping hole 41 set on the retaining spring 4 to clamp the retaining spring 4.

[0027] The present invention also provides a method for installing a brake retaining spring, which is installed using the above-mentioned installation device. The specific installation method is as follows.

[0028] A. First, pass the pin through the through hole on the limit shaft and assemble it with the limit shaft to complete the assembly of the installation device.

[0029] B. Then lay the regulator sleeve, spring and washer into the inner cavity of the piston in order from bottom to top; then place the retaining ring horizontally at the opening of the inner cavity of the piston, and pass the lower shaft of the limit shaft in the installation device through the retaining ring and put it into the inner cavity of the piston, and at the same time align the retaining ring clamping groove set on the limit shaft with the clamping hole set on the retaining ring; then extend the retaining ring pliers downward along the retaining ring clamping groove set on the limit shaft into the clamping hole on the retaining ring to tighten the retaining ring, and at the same time apply downward pressure to allow the retaining ring to enter the inner cavity of the piston.

[0030] C. After the circlip enters the inner cavity of the piston, withdraw the circlip pliers and continue to press the limit shaft downward so that the small sleeve opening on the upper part of the adjuster sleeve enters the circular groove cavity of the limit shaft. At the same time, the lower shaft at the lower part of the limit shaft enters the inner cavity of the adjuster sleeve and forms a small gap fit.

[0031] D. Then continue to press the installation device downward to ensure that the upper shaft of the limit shaft can enter the inner cavity of the piston and form a clearance fit with the inner wall of the piston; in the process of pressing downward, the position of the piston and the adjuster sleeve will be corrected to a concentric and coaxial state under the action of the clearance fit, avoiding the occurrence of eccentricity that affects the use effect of the brake, thereby completing the installation of the retaining spring quickly and efficiently.

[0032] F. When the circlip is pressed down until it reaches the circlip groove, the diameter of the circlip groove becomes larger, and the clamping force of the inner wall of the piston on the circlip disappears. The circlip will automatically open and get stuck in the circlip groove. At this time, the spring in the inner cavity of the piston is in a compressed state.

[0033] G. After the retaining ring is inserted into the retaining ring groove, the operator holds the pin in the installation device and pulls the installation device upward from the inner cavity of the piston. The spring automatically rebounds under the action of the reverse compression force, and at the same time drives the adjuster sleeve and the washer to rebound to the position of the retaining ring groove. The retaining ring above the washer fixes the adjuster sleeve, spring and washer in the piston. At this point, the installation of the internal parts of the piston and the retaining ring is completed.

[0034] The present invention provides a brake retaining spring installation device with a simple structure, easy operation, and reduced installation difficulty. It can ensure the coaxiality between various components during the installation process while quickly completing the assembly of the brake piston and the retaining spring, thereby avoiding subsequent damage to the inner wall of the piston and increasing the service life of the workpiece.

Claims

1. A brake retaining spring installation device, characterized in that: It comprises a stepped limit shaft (1) with a larger diameter at the top and smaller diameter at the bottom, a through hole being radially penetrated through the upper part of the limit shaft (1), and a pin shaft (2) being mounted in the through hole for facilitating the operation of the limit shaft (1); a small clearance fit is formed between a large diameter upper shaft (11) at the upper part of the limit shaft (1) and the inner wall of a brake piston (3), and a small clearance fit is also formed between a small diameter lower shaft (12) at the lower part of the limit shaft (1) and the inner wall of a brake adjuster sleeve (7); a retaining spring clamping groove (13) penetrating the shaft body is axially formed on the side surface of the upper shaft (11) at the upper part of the limit shaft (1), the retaining spring clamping groove (13) formed on the side surface of the limit shaft (1) is aligned with a clamping hole (41) provided on a brake retaining spring (4) located at the bottom end surface of the upper shaft (11), and a retaining spring pliers extends along the retaining spring clamping groove (13) into the clamping hole (41) on the retaining spring (4) to clamp the retaining spring (4); A concave circular groove-shaped cavity (14) is formed upwardly at the connection between the upper shaft (11) and the lower shaft (12) of the limit shaft (1); a small sleeve opening (71) is provided on the upper part of the adjuster sleeve (7) of the brake and is inserted into the circular groove-shaped cavity (14) during assembly; the depth of the circular groove-shaped cavity (14) is greater than the height of the small sleeve opening (71) on the upper part of the adjuster sleeve (7).

2. A brake circlip installation method, characterized in that: The installation is performed using the installation device described in claim 1, and specifically comprises the following steps: A. First, pass the pin through the through hole on the limit shaft and assemble it with the limit shaft to complete the assembly of the installation device; B. Then lay the regulator sleeve, spring and washer into the inner cavity of the piston in order from bottom to top; then place the circlip horizontally at the opening of the inner cavity of the piston, and put the lower shaft of the limit shaft in the installation device through the circlip into the inner cavity of the piston, and align the circlip clamping groove set on the limit shaft with the clamping hole set on the circlip; then extend the circlip pliers downward along the circlip clamping groove set on the limit shaft into the clamping hole on the circlip to clamp the circlip, and apply downward pressure to allow the circlip to enter the inner cavity of the piston; C. After the circlip enters the inner cavity of the piston, withdraw the circlip pliers and continue to press the limit shaft downward so that the small sleeve opening on the upper part of the regulator sleeve enters the circular groove cavity of the limit shaft, and at the same time, the lower shaft at the lower part of the limit shaft enters the inner cavity of the regulator sleeve and forms a small clearance fit; D. Then continue to press the installation device downward to ensure that the upper shaft of the limit shaft can enter the inner cavity of the piston and form a clearance fit with the inner wall of the piston; F. When the circlip is pressed down until it reaches the circlip groove, the diameter of the circlip groove becomes larger, and the clamping constraint force of the inner wall of the piston on the circlip disappears, and the circlip will automatically open and get stuck in the circlip groove. At this time, the spring in the inner cavity of the piston is in a compressed state; G. After the retaining ring is inserted into the retaining ring groove, the pin in the handheld installation device is pulled upward from the inner cavity of the piston. The spring automatically rebounds under the action of the reverse compression force, and at the same time drives the adjuster sleeve and the washer to rebound to the position of the retaining ring groove. The retaining ring above the washer fixes the adjuster sleeve, spring and washer in the piston. At this point, the installation of the internal parts of the piston and the retaining ring is completed.

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