Steel ball pressing device of disc brake

Abstract

The utility model relates to the technical field of disc brake assembly, and provides a disc brake steel ball pressing device which comprises a workbench, a supporting frame is arranged on the workbench, a positioning assembly and a press-fitting assembly are arranged on the supporting frame, and the press-fitting assembly is located above the positioning assembly. The positioning assembly comprises a positioning plate, a positioning pin is arranged at the bottom of the positioning plate and used for being matched with a positioning hole in the brake caliper, and a press-fitting hole is formed in the positioning plate in a penetrating mode and used for containing a steel ball to be press-fitted. A leveling hole is formed in the positioning plate in a penetrating manner and is used for leveling the clearance adjuster and the brake caliper after the steel ball is pressed; the press-fitting assembly comprises a punching needle and a punching hammer, the bottom end of the punching needle is used for stretching into the press-fitting hole and the leveling hole, and the punching hammer is used for hammering the punching needle. The steel ball press-fitting positioning device can accurately position the steel ball press-fitting position, meanwhile avoids material loss in the press-fitting process, and improves economical efficiency and safety of operators.

Description

Technical Field

[0001] The utility model relates to the technical field of disc brake assembly, and particularly relates to a disc brake steel ball pressing device. Background Art

[0002] After the disc brake is repaired, the steel ball used to maintain the relative position between the clearance adjuster and the caliper body between the brake caliper and the clearance adjuster will fall off. Therefore, it is necessary to press the steel ball back again to lock the clearance adjuster and the brake caliper to prevent the clearance adjuster from rotating.

[0003] Currently, the general operation of pressing the steel ball is to first place the steel ball at the position to be pressed. One hand of the operator holds the punch pin, with the punch pin head aligned with the steel ball, and the other hand holds a small hammer. The small hammer is used to strike the end of the punch pin away from the steel ball, so that the steel ball is pressed into the pressing position. However, this assembly method has poor safety, and it is easy for the steel ball to come out during the pressing process. Both the economy and the assembly efficiency are not good.

[0004] Therefore, in view of the above problems, a disc brake steel ball pressing device is proposed to solve the above problems. Content of the Utility Model

[0005] Aiming at the deficiencies of the prior art, the utility model develops a disc brake steel ball pressing device, which can accurately position the steel ball pressing position, avoid material loss during pressing, and improve the economy and the safety of the operator.

[0006] To achieve the above object, the utility model is realized through the following technical solutions:

[0007] A disc brake steel ball pressing device for the assembly between the brake caliper and the clearance adjuster of the disc brake, comprising:

[0008] A workbench for placing the brake caliper. A support frame is arranged on the workbench, and a positioning component and a pressing component are arranged on the support frame. The pressing component is located above the positioning component; the positioning component includes a positioning plate. A positioning pin is arranged at the bottom of the positioning plate for cooperating with the positioning hole on the brake caliper. A pressing hole is penetrated and opened corresponding to the position of the steel ball pressing between the brake caliper and the clearance adjuster on the positioning plate for placing the steel ball to be pressed; a leveling hole is penetrated and opened corresponding to the clearance between the brake caliper and the clearance adjuster on the positioning plate for leveling the clearance adjuster and the brake caliper after the steel ball is pressed; the pressing component includes a punch pin and a punch hammer. The bottom end of the punch pin is used to extend into the pressing hole and the leveling hole, and the punch hammer is used to hammer the punch pin.

[0009] Preferably, a through hole is also penetrated and opened on the positioning plate for avoiding the top end of the clearance adjuster; the positioning pin includes three, and the positions on the positioning plate are not on the same straight line. Three-point positioning is adopted, so that when the positioning pin cooperates with the positioning hole, the pressing hole is located directly above the steel ball pressing position.

[0010] Preferably, a slide rail is arranged on one side of the workbench, a slider is slidably arranged on the slide rail, and a support frame is arranged on the slider; a locking member is further included, which is arranged on the slider and is used to temporarily fix the position of the slider on the slide rail. A locking bolt is selected. A threaded hole is penetrated through the slide plate. The locking member is threadedly connected with the threaded hole, and by tightening the locking bolt, the locking bolt is in pressing contact with the slide rail, and the movement of the slide plate is restricted by increasing the friction force to limit the position of the slider.

[0011] Preferably, the support frame includes a guide frame and a lead screw. The axis of the lead screw is parallel to the length direction of the guide frame. The lead screw is rotatably arranged on one side of the guide frame. An up-and-down moving seat is slidably arranged on the guide frame, and the lead screw is threadedly connected with the up-and-down moving seat. The rotation of the lead screw is used to drive the up-and-down moving seat to slide along the length direction of the guide frame.

[0012] Preferably, the positioning assembly further includes a positioning rod, which is arranged on the up-and-down moving seat. The positioning rod is parallel to the tabletop of the workbench. A positioning seat is slidably arranged on the positioning rod, and a flexible member is arranged on the positioning seat. The flexible member is connected to the positioning plate.

[0013] Preferably, the press-fitting assembly further includes a press-fitting rod. One end of the press-fitting rod is rotatably arranged on the up-and-down moving seat and is located above the positioning rod. A handle is arranged at the other end of the press-fitting rod for easy grasping and pressing down. A chute is opened along the length direction of the press-fitting rod. A sliding press block is slidably arranged in the chute. An adjusting screw is rotatably arranged along the length direction of the chute in the chute. The adjusting screw is threadedly connected with the sliding press block and is used to adjust the position of the sliding press block in the chute; a press-fitting cylinder is rotatably arranged on the sliding press block. A punch needle is movably arranged at the bottom inside the press-fitting cylinder. The bottom end of the punch needle is located outside the press-fitting cylinder. A top block is arranged above the punch needle. The top block is slidably arranged in the press-fitting cylinder. A large spring is arranged above the top block. A small spring is sleeved inside the large spring. The punch hammer includes a hammer head and a hammer handle. The small spring is sleeved on the hammer handle. The hammer handle is inclined, and the hammer head of the punch hammer is clamped on the side wall of the top block. A protrusion is convexly arranged on the inner wall of the press-fitting cylinder above the hammer head for pushing the hammer head towards the middle of the top block.

[0014] Preferably, a return spring is further included, which is arranged between the press-fitting rod and the up-and-down moving seat and is used for the press-fitting rod to return to the initial angular position after being pressed down.

[0015] The effects provided in the utility model content are only the effects of the embodiments, rather than all the effects of the utility model. The above technical solutions have the following advantages:

[0016] 1. The utility model positions more accurately by setting a positioning plate with positioning pins on it, and the positioning pins and the positioning holes on the brake caliper adopt a three-point positioning method, so that the press-fitting hole is directly above the steel ball assembly position. When assembling, the steel ball is placed in the press-fitting hole, avoiding the problem that the steel ball slips out of the press-fitting position due to uneven force during the press-fitting of the steel ball, which is difficult to retrieve and poses a safety hazard, thus improving the safety and economy of the steel ball press-fitting process.

[0017] 2. The utility model sets a press-fitting assembly, and the press-fitting rod presses down the punch to hammer the punch pin, replacing the traditional assembly method in which an operator holds the punch pin in one hand and a hammer in the other hand to strike, avoiding possible safety problems, improving the safety of the operator, and increasing the efficiency of steel ball press-fitting. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings are used to provide a further understanding of the utility model and constitute a part of the specification. Together with the embodiments of the utility model, they are used to explain the utility model, but do not constitute a limitation to the utility model.

[0019] Figure 1 It is a schematic diagram of the overall structure of the embodiment of the utility model;

[0020] Figure 2 It is a schematic diagram of the position of the support frame of the embodiment of the utility model;

[0021] Figure 3 It is a partial structural schematic diagram of the positioning component of the embodiment of the utility model;

[0022] Figure 4 It is a structural schematic diagram of the positioning plate of the embodiment of the utility model Figure 1 ;

[0023] Figure 5 It is a structural schematic diagram of the positioning plate of the embodiment of the utility model Figure 2 ;

[0024] Figure 6 It is a schematic diagram of the structure of the press-fitting rod and its connection in the embodiment of the utility model;

[0025] Figure 7 It is a schematic diagram of the structure of the press-fitting cylinder and its connection in the embodiment of the utility model;

[0026] Figure 8 It is a cross-sectional structural schematic diagram of the press-fitting cylinder in the embodiment of the utility model;

[0027] Figure 9 It is a schematic diagram of the structure of the top block in the embodiment of the utility model;

[0028] Figure 10 It is a schematic diagram of the position of steel ball press-fitting in the embodiment of the utility model;

[0029] Figure 11 This is a schematic diagram of the positioning position of the positioning plate in the embodiment of the present utility model.

[0030] In the figure, 1, workbench; 2, support frame; 3, positioning assembly; 4, press-fitting assembly; 5, steel ball; 6, return spring; 7, brake caliper; 8, clearance adjuster; 11, slide rail; 12, slider; 13, locking member; 21, guide frame; 22, lead screw; 23, up and down moving seat; 31, positioning plate; 32, positioning pin; 33, positioning rod; 34, positioning seat; 35, flexible member; 311, press-fitting hole; 312, leveling hole; 313, through hole; 41, punch needle; 42, punch hammer; 43, press-fitting rod; 44, sliding press block; 45, adjusting screw; 46, press-fitting cylinder; 431, handle; 432, chute; 461, top block; 462, large spring; 463, small spring. Specific embodiments

[0031] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0032] As Figures 1 - 11 shown, the present utility model provides a technical solution:

[0033] A disc brake steel ball pressing device is used for the assembly between a brake caliper 7 and a clearance adjuster 8 of a disc brake, and includes: a workbench 1 for placing the brake caliper 7, a support frame 2 is arranged on the workbench 1, a positioning component 3 and a pressing component 4 are arranged on the support frame 2, and the pressing component 4 is located above the positioning component 3; the positioning component 3 includes a positioning plate 31, a positioning pin 32 is arranged at the bottom of the positioning plate 31, and the positioning pin 32 is used for cooperating with a positioning hole on the brake caliper 7. A pressing hole 311 is penetrated through at the position corresponding to the pressing of the steel ball 5 between the brake caliper 7 and the clearance adjuster 8 on the positioning plate 31, and the pressing hole 311 is used for placing the steel ball 5 to be pressed; a leveling hole 312 is penetrated through at the position corresponding to the gap between the brake caliper 7 and the clearance adjuster 8 on the positioning plate 31, and the leveling hole 312 is used for leveling the clearance adjuster 8 and the brake caliper 7 after the steel ball 5 is pressed. Preferably, both the pressing hole 311 and the leveling hole 312 are countersunk holes with the same diameter, and two leveling holes 312 are arranged, and the two leveling holes 312 are arranged in a triangular shape with the pressing hole 311; the pressing component 4 includes a punch pin 41 and a punch hammer 42, the punch pin 41 and the punch hammer 42 are both arranged in a pressing cylinder 46, the bottom end of the punch pin 41 is used for extending into the pressing hole 311 and the leveling hole 312, and the punch hammer 42 is used for hammering the punch pin 41 to realize the pressing of the steel ball 5 and the flattening of the gap between the brake caliper 7 and the clearance adjuster 8.

[0034] In this embodiment, a through hole 313 is also penetrated through the positioning plate 31, and the through hole 313 is located in the middle of the triangular position between the leveling hole 312 and the pressing hole 311, and is used for avoiding the top end of the clearance adjuster 8; the positioning pin 32 includes three, and the positions on the positioning plate 31 are not on the same straight line, that is, a three-point positioning method is adopted for positioning, so that when the positioning pin 32 cooperates with the positioning hole, the pressing hole 311 is located directly above the pressing position of the steel ball 5, which is convenient for the steel ball 5 to just fall at the pressing position after the steel ball 5 is placed, and the accuracy is good.

[0035] In this embodiment, a slide rail 11 is arranged on one side of the workbench 1, the cross section of the slide rail 11 is T-shaped, a slider 12 is slidably arranged on the slide rail 11, and a support frame 2 is arranged on the slider 12; a locking member 13 is also included, and the locking member 13 is arranged on the slider 12 and is used for temporarily fixing the position of the slider 12 on the slide rail 11; the locking member 13 is selected as a locking bolt, a threaded hole is penetrated through the slide plate, and the locking member 13 is threadedly connected with the threaded hole, and the locking bolt is screwed tightly so that the locking bolt is in pressing contact with the slide rail 11, and the movement of the slide plate is restricted by increasing the friction force to temporarily limit the position of the slider 12, thereby improving the stability of the device.

[0036] In this embodiment, the support frame 2 includes a guide frame 21 and a lead screw 22. The guide frame 21 is vertically arranged, and the axis of the lead screw 22 is parallel to the length direction of the guide frame 21. The lead screw 22 is rotatably arranged on one side of the guide frame 21. A vertically moving seat 23 is slidably arranged on the guide frame 21, and the lead screw 22 is threadedly connected to the vertically moving seat 23. The rotation of the lead screw 22 is used to drive the vertically moving seat 23 to slide up and down along the length direction of the guide frame 21. Preferably, a runner or a crank is arranged at the upper end of the lead screw 22 outside the guide frame 21 to drive the rotation of the lead screw 22, improving the stability of the movement of the vertically moving seat 23.

[0037] In this embodiment, the positioning assembly 3 further includes a positioning rod 33. The positioning rod 33 is arranged on the vertically moving seat 23, and the length direction of the positioning rod 33 is parallel to the tabletop of the workbench 1. A positioning seat 34 is slidably arranged on the positioning rod 33. A flexible member 35 is arranged on one side of the positioning seat 34. The flexible member 35 is connected to the positioning plate 31. The positioning plate 31 is located on one side of the positioning rod 33 to prevent the positioning rod 33 from affecting the use of the positioning plate 31. The flexible member 35 can be selected from small short springs or short suspension ropes, etc., and is arranged on the four sides or four corners of the positioning plate 31. While connecting the positioning plate 31 and the positioning seat 34, it enables the positioning plate 31 to have a certain displacement and angle adjustment ability. Since the matching accuracy between the positioning plate 31 and the brake caliper 7 is relatively high, in order to improve the assembly efficiency and reduce the matching error, the positioning plate 31 can freely move up and down, left and right, and back and forth within a certain range, so that the positioning positions of the slider 12 and the vertically moving seat 23 during positioning do not need to be too precise. The arrangement of the flexible member 35 compensates for the small errors during the positioning of the positioning plate 31 and improves the assembly efficiency.

[0038] In this embodiment, the press-fitting assembly 4 also includes a press-fitting rod 43, a sliding slot hole is provided in the middle of the press-fitting rod 43 along the length direction, one end of the press-fitting rod 43 is rotatably arranged on the up-and-down moving seat 23, and is located above the positioning rod 33, so that the press-fitting rod 43 can be rotated up and down around one end, and a handle 431 is provided at the other end of the press-fitting rod 43, which is convenient for the operator to grasp and press down; sliding grooves 432 are provided on both sides of the sliding slot along the length direction of the press-fitting rod 43, a sliding pressure block 44 is slidably provided in the sliding groove 432, and an adjusting screw 45 is rotatably provided in the sliding groove 432 along the length direction of the sliding groove 432, and the adjusting screw 45 is threadedly connected to the sliding pressure block 44, and is used to adjust the sliding pressure block 44 by rotating. The pressing cylinder 46 is rotatably arranged on the sliding block 44, and due to the effect of gravity, the axis of the pressing cylinder 46 is always perpendicular to the table surface of the workbench 1 when it is not subjected to force; a hole is opened at the bottom of the pressing cylinder 46 and a punching needle 41 is movably arranged in the hole, the bottom end of the punching needle 41 is located outside the pressing cylinder 46, the top end of the punching needle 41 is clamped in the pressing cylinder 46, and a top block 461 is slidably arranged in the pressing cylinder 46 above the punching needle 41, a large spring 462 is arranged above the top block 461, and a small spring 463 is sleeved on the inner side of the large spring 462, the punching hammer 42 includes a hammer head and a hammer handle, the small spring 463 is sleeved on the hammer handle, and the hammer handle is arranged obliquely, so that the hammer head of the punching hammer 42 can be clamped in the top block 461 On the side wall, a protrusion is protruded on the inner wall of the press-fitting cylinder 46 above the hammer head. The protrusion is used to push the hammer head toward the middle of the top block 461 when the hammer 42 moves upward, so that the hammer head is out of the stuck state and hammers the punch needle 41 below under the compressed elastic potential energy of the small spring 463. The action principle of the structure in the press-fitting cylinder 46 is similar to that of a press-type firing pin window breaker. The specific action is: the press-fitting cylinder 46 is pressed downward, so that the top end of the punch needle 41 pushes the top block 461 upward relative to the press-fitting cylinder 46, and the top block 461 compresses the large spring 462 while pushing the hammer 42 to move upward. The hammer 42 compresses the small spring 463, and the hammer 42 is affected by the protrusion on the inner wall of the press-fitting cylinder 46 while moving. It gradually slides toward the center of the top block 461 until the hammer 42 disengages from the gear position of the top block 461 and hammers the upper end of the punch needle 41 under the elastic potential energy of the small spring 463. After the hammering is completed, no downward pressure is continued to be applied to the pressing cylinder 46, and the top block 461 falls back to the initial position under the elastic potential energy of the large spring 462. At this time, the large spring 462 and the small spring 463 are not subjected to force, and the hammer 42 returns to the clamping state with the top block 461, preparing for the next hammering, which can achieve multiple rapid hammerings with better safety. The hammering force of the hammer 42 is related to the elastic coefficient of the small spring 463 and the stroke of the hammer 42. The higher the elastic coefficient of the small spring 463 and the longer the stroke of the hammer 42, the greater the hammering force.

[0039] In another embodiment, a threaded cap is provided at the bottom of the press cylinder 46 to facilitate assembly, maintenance, and replacement of parts inside the press cylinder 46, thereby improving the economy and practicality of the device.

[0040] In this embodiment, a return spring 6 is further included, which is arranged between the pressing rod 43 and the vertically movable seat 23, and is used to restore the initial angular position after the pressing rod 43 is pressed down. At the same time, it avoids the instability caused by the fact that one end of the pressing rod 43 is rotatably arranged, and improves the safety and stability of the device during use.

[0041] In another embodiment, one end of the pressing rod 43 that is rotatably connected to the vertically movable seat 23 is connected through a rotating seat. Specifically, one end of the rotating seat is rotatably arranged on the vertically movable seat 23, and the other end of the rotating seat is slidably arranged at one end of the pressing rod 43 close to the vertically movable seat 23, and the sliding direction of the rotating seat is parallel to the length direction of the slide rail 11, so that the pressing rod 43 can move left and right relative to the positioning rod 33. Due to the impact of being struck when pressing the pressing steel ball 5, the position on the side of the clearance adjuster 8 away from the steel ball 5 will be slightly warped, so it is necessary to strike this side to level it. Then it is necessary for the pressing rod 43 to drive the punch 41 to move in this side direction to achieve rapid leveling, which improves the practicability and efficiency of the device.

[0042] Working principle: First, place the brake caliper 7 with the clearance adjuster 8 installed on the workbench 1, and then adjust the positions of the slider 12, the vertically movable seat 23 and the positioning seat 34 so that the positioning plate 31 is roughly located above the clearance adjuster 8; then lower the vertically movable seat 23 so that the positioning plate 31 is accurately positioned through three-point positioning, and make the flexible members 35 not be in a stressed state; put the steel ball 5 into the pressing hole 311; then adjust the positions of the pressing rod 43 and the sliding pressing block 44 so that the pressing cylinder 46 is located above the pressing hole 311, and make the bottom end of the punch 41 fall into the pressing hole 311 to contact the steel ball 5 by rotating the pressing rod 43 downward; preferably, finely adjust the position of the sliding pressing block 44 so that the axis of the punch 41 is as perpendicular as possible to the plate surface of the positioning plate 31 to facilitate downward force application; then the operator holds the handle 431 and presses down the pressing cylinder 46 so that the impact hammer 42 hammers the punch 41 to press the steel ball 5 in place, and it can be hammered multiple times to ensure being in place; then lift the pressing rod 43 and horizontally move the pressing rod 43, adjust the position of the sliding pressing block 44 so that the punch 41 is located above the leveling hole 312, and in the same step of hammering the steel ball 5, impact the gap between the brake caliper 7 and the clearance adjuster 8 in the leveling hole 312 to level it; then adjust to separate the positioning plate 31 from the brake caliper 7 to complete the operation of pressing the steel ball 5.

[0043] The details not elaborated in this utility model are all well-known conventional technical means in the art.

[0044] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0045] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, the meaning of "a plurality" is two or more, unless otherwise specifically defined.

[0046] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

[0047] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or perform equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A disc brake steel ball pressing device, which is used for the assembly between the brake caliper and the clearance adjuster of the disc brake, and includes a workbench for placing the brake caliper. The characteristics are as follows: A support frame is arranged on the workbench, and a positioning component and a pressing component are arranged on the support frame. The pressing component is located above the positioning component; The positioning component includes a positioning plate. A positioning pin is arranged at the bottom of the positioning plate and is used to cooperate with the positioning hole on the brake caliper. A pressing hole is penetrated through the positioning plate for placing the steel ball to be pressed. A leveling hole is penetrated through the positioning plate for leveling the clearance adjuster and the brake caliper after the steel ball is pressed; The pressing component includes a punch pin and a punch hammer. The bottom end of the punch pin is used to extend into the pressing hole and the leveling hole, and the punch hammer is used to hammer the punch pin.

2. The ball pressing device for a disc brake according to claim 1, wherein: A through hole is also penetrated through the positioning plate for avoiding the top end of the clearance adjuster. There are three positioning pins, and their positions on the positioning plate are not on the same straight line.

3. The disc brake steel ball pressing device according to claim 2, characterized in that: A slide rail is arranged on one side of the workbench. A slider is slidably arranged on the slide rail, and a support frame is arranged on the slider. A locking piece is also included, which is arranged on the slider and is used to temporarily fix the position of the slider on the slide rail.

4. The ball pressing device for a disc brake according to claim 3, wherein: The support frame includes a guide frame and a lead screw. The axis of the lead screw is parallel to the length direction of the guide frame. The lead screw is rotatably arranged on one side of the guide frame. An up and down moving seat is slidably arranged on the guide frame, and the lead screw is threadedly connected with the up and down moving seat. The rotation of the lead screw is used to drive the up and down moving seat to slide along the length direction of the guide frame.

5. The disc brake steel ball pressing device according to claim 4, characterized in that: The positioning component further includes a positioning rod, which is arranged on the up and down moving seat. The positioning rod is parallel to the tabletop of the workbench. A positioning seat is slidably arranged on the positioning rod, and a flexible piece is arranged on the positioning seat and is connected to the positioning plate.

6. The ball pressing device for a disc brake according to claim 5, characterized in that: The pressing component further includes a pressing rod. One end of the pressing rod is rotatably arranged on the up and down moving seat and is located above the positioning rod. A handle is arranged at the other end of the pressing rod. A chute is opened along the length direction of the pressing rod. A sliding pressure block is slidably arranged in the chute. An adjusting screw is rotatably arranged along the length direction of the chute in the chute, and the adjusting screw is threadedly connected with the sliding pressure block for adjusting the position of the sliding pressure block in the chute; A pressing cylinder is rotatably arranged on the sliding pressure block. The bottom of the pressing cylinder is movably provided with a punch pin. The bottom end of the punch pin is located outside the pressing cylinder. A top block is arranged above the punch pin and is slidably arranged in the pressing cylinder. A large spring is arranged above the top block, and a small spring is sleeved inside the large spring. The punch hammer includes a hammer head and a hammer handle. The small spring is sleeved on the hammer handle, and the hammer head of the punch hammer can be clamped on the side wall of the top block. A protrusion is convexly arranged on the inner wall of the pressing cylinder above the hammer head for pushing the hammer head towards the middle of the top block.

7. The ball pressing device for a disc brake according to claim 6, characterized in that: A return spring is also included, which is arranged between the pressing rod and the up and down moving seat and is used for the pressing rod to restore to its initial angular position after being pressed down.

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