Brake plectrum adjusting tool
By designing a brake paddle adjustment tool, the problem of relying on experience for drum brake clearance adjustment was solved, enabling quantitative adjustment and applicability to multiple specifications, thus improving safety and ease of operation.
Patent Information
- Application Number
- CN202520550994.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-27
- Publication Date
- 2026-02-10
- Estimated Expiration
- 2035-03-27
AI Technical Summary
In the existing technology, the adjustment of the gap between the brake shoe and the brake drum of the drum brake depends on the operator's experience, which cannot be quantified, leading to difficulties in quality control and potential safety hazards.
Design a brake paddle adjustment tool, including an adjustment tool body, an adjustment lever, a scale, and a detachable adjustment lever. Quantitative adjustment is achieved through a threaded structure and a spring system. Combined with the detachable adjustment lever, it is suitable for different braking systems.
It enables quantitative adjustment of braking clearance, improves quality control, reduces operating costs, is applicable to various braking systems, and simplifies the operation process.
Smart Images
Figure CN223889939U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a brake adjustment tool, specifically a brake paddle adjustment tool. Background Technology
[0002] The clearance between the brake shoes and the brake drum in a drum brake is crucial for brake adjustment. If this clearance is too large or too small, it may lead to excessively long braking distances, insufficient braking force, or abnormal wear of the brake shoes. Inconsistent clearance adjustments on both sides of the same axle may cause uneven braking force between the wheels, resulting in skidding. Therefore, improper clearance adjustment poses a significant safety hazard. Figure 2 The braking system shown has brake paddles. Currently, the brake paddles are mostly adjusted using screwdrivers or other similar simple tools. The adjustment relies entirely on the operator's experience, and there is no way to quantitatively manage the adjustment of the brake clearance, which makes it a difficult point for quality control. Utility Model Content
[0003] To address the problems existing in the prior art, this utility model provides a brake paddle adjustment tool. Through a simple structural design, it solves the problem of quantifiable brake clearance adjustment during the brake clearance adjustment process. It has the following advantages: The simple structural design eliminates the use of complex structures such as sensors, reducing damage and increasing reliability. It is also easy to operate, requiring no complex instruction. Furthermore, the brake paddle adjustment tool is simple to manufacture and has low production costs, facilitating large-scale deployment and use. This tool is suitable not only for production processes but also for after-sales maintenance. The replaceable adjustment lever structure allows for coarse adjustments via the lever and fine adjustments via the main body of the tool, making it applicable to a wider range of brake systems. By replacing the adjustment lever, the tool can also be used in other similar applications requiring adjustment. The adjustment lever is a wear-prone component; its low manufacturing cost means only the easily worn lever needs to be replaced, eliminating the need for complete replacement and reducing overall operating costs.
[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a brake paddle adjustment tool, comprising: an adjustment tool body and an adjustment lever. The adjustment tool body includes: an adjustment block, a hollow shell, a spring, a top block, a middle block, a rotating block, and a pin. The adjustment block is inserted into one end of the hollow shell, and the rotating block is inserted into the other end of the hollow shell. The rotating block is fixed to the hollow shell by the pin. The rotating block can swing along the pin in the hollow shell. The adjustment lever is installed at the other end of the rotating block. The spring, the top block, and the middle block are sequentially arranged between the adjustment block and the rotating block in the hollow shell. The top block can move along the axial direction of the hollow shell. The spring force is adjusted by adjusting the adjustment block, thereby adjusting the force between the top block, the middle block, and the rotating block, and thus adjusting whether the rotating block can swing.
[0005] Furthermore, the adjusting block is connected to the hollow shell via a threaded structure. The adjusting block moves back and forth as the threads of the hollow shell rotate, compressing or extending the length of the spring as the adjusting block moves back and forth.
[0006] Furthermore, a scale is designed between the adjustment block and the hollow outer shell to measure the movement distance of the adjustment block, thereby ensuring the quantification of the adjustment.
[0007] Furthermore, there is a gap between the rotating block and the hollow outer shell, allowing the rotating block to rotate around the pin.
[0008] Furthermore, the rotating block and the top block have grooves on their end faces, and the middle block is stuck in the grooves of the rotating block and the top block.
[0009] Furthermore, the width of the middle block is smaller than the groove size of the rotating block and the top block, and the grooves of the rotating block and the top block are designed with chamfered structures.
[0010] Furthermore, the grooves of the rotating block and the top block are trapezoidal grooves, and the middle block is a square block, wherein the width of the square block is less than or equal to the width of the bottom of the trapezoidal groove.
[0011] Furthermore, the adjustment lever is detachable, allowing for the replacement of adjustment levers of different shapes and lengths to suit different brake pads.
[0012] The beneficial effects of this utility model are: by using a brake paddle adjustment tool, the problem of uncontrollable quality and low product quality caused by adjusting the brake clearance based on the operator's experience can be eliminated. The adjustment of the brake clearance can be quantified and controlled, and quality problems will not be caused by personnel, which can greatly improve the quality. At the same time, the operation is simpler, no longer requiring people to adjust by feel, making the operation more convenient and improving production efficiency. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the structure of this utility model;
[0014] Figure 2 This is a schematic diagram of the brake structure;
[0015] Figure 3 This is a schematic diagram of the structure of this utility model in use;
[0016] In the diagram: 1. Adjustment tool body; 11. Adjustment block; 12. Hollow outer shell; 13. Spring; 14. Top block; 15. Middle block; 16. Rotating block; 17. Pin; 2. Adjustment lever; 3. Brake; 31. Adjustment paddle; 32. Adjustment support device; 33. Brake shoe; 34. Dust cover. Detailed Implementation
[0017] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. However, it should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit its scope.
[0018] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention.
[0019] like Figure 1 As shown, a brake paddle adjustment tool includes: an adjustment tool body 1 and an adjustment lever 2.
[0020] Since the brake clearance of each vehicle model generally only needs to be adjusted to a fixed brake clearance, using an overly complex measuring tool for the adjustment tool body 11 would increase cost and operational difficulty. The adjustment tool body 11 is a simple, adjustable, constant force measuring tool that can meet the adjustment requirements of the adjustment lever 31. The adjustment tool body 11 consists of an adjustment block 11, a hollow housing 12, a spring 13, a top block 14, a middle block 15, a rotating block 16, and a pin 17. The adjustment block 11 and the hollow housing 12 have a threaded structure. The adjustment block 11 can move back and forth when the thread of the hollow housing 12 rotates. When the adjustment block 11 moves back and forth, it can compress or extend the length of the spring 13. A scale is designed between the adjustment block 11 and the hollow housing 12 to measure the movement distance of the adjustment block 11. This ensures the quantification of the adjustment; the other end of the spring 13 presses on the top block 14, which can move along the axial direction of the hollow shell 12. According to the spring force formula F=-k*x, the same spring 13, under the same elastic coefficient, will produce different clamping forces at different compression distances; the rotating block 16 is connected to the hollow shell 12 by a pin 17, and there is a gap between the rotating block 16 and the hollow shell 12, allowing the rotating block 16 to rotate around the pin 17; there is an intermediate block 15 between the rotating block 16 and the top block 14, and there are grooves on the end faces of the rotating block 16 and the top block 14. The intermediate block 15 is fitted into the grooves of the rotating block 16 and the top block 14. The width of the intermediate block 15 is smaller than the groove size of the rotating block 16 and the top block 14, and the grooves of the rotating block 16 and the top block 14 are designed with chamfered structures. Under the action of the spring force of the spring 13, the top block 14 and the middle block 15 press against the rotating block 16, preventing the rotating block 16 from rotating around the pin 17. When the force of the adjusting lever 31 is greater than the spring force of the spring 13, the rotating block 16 will spring away from the middle block 15 and rotate along the pin 17. When the rotating block 16 rotates, there will be a certain gap. At this time, the force of pressing the adjusting tool body 11 will be released, thereby achieving the effect of fixing the pressing force. Switching to the bottom can achieve a fixed adjustment of the magnitude of the force of the adjusting lever 31.
[0021] The grooves of the rotating block 16 and the top block 14 are trapezoidal grooves, and the middle block 15 is a square block. The width of the square block is less than or equal to the width of the bottom of the trapezoidal groove, which makes it easier to move and fix the middle block 15.
[0022] The adjusting lever 2 is detachable, allowing for the replacement of different shapes and lengths of adjusting lever 2 depending on the different brakes 3. The adjusting lever 2 can be made in different shapes to meet space constraints during adjustment. Furthermore, the contact point between the adjusting lever 2 and the adjusting plate 31 can be designed in different shapes to ensure better contact between them and prevent the adjusting lever 2 from falling off due to excessive force during adjustment. The length of the adjusting lever 2 can also be made in different lengths. Based on the principle of lever torque, different lengths will require different adjustment forces, enabling coarse adjustment. Combined with the fine adjustment function of the adjusting tool body 11, it allows for the adjustment of the gap of more specifications of brakes 3.
[0023] like Figure 2 As shown, the working principle of brake clearance adjustment is that the extension length of the adjusting support device 32 can be adjusted by adjusting the paddle 31. The length of the adjusting support device 32 controls the distance supported by the brake shoe 33, thereby controlling the brake clearance. The adjusting support device 32 has a spring structure inside. When adjusting the adjusting paddle 31, the spring is compressed, so the force of the adjusting paddle 31 will change with the brake clearance. According to the spring force formula F=-k*x, for springs of the same specification and with the same elastic coefficient, the brake clearance of the braking system can be determined by adjusting the force of the adjusting paddle 31.
[0024] like Figure 3 As shown, the dust cover of the brake 3 has an adjustment hole for the brake paddle. The distance from the adjustment hole to the adjustment paddle 31 is fixed. The adjustment lever 2 is inserted into the teeth of the adjustment paddle 31 to form a fixed lever device with the adjustment hole of the dust cover. The main body 1 of the adjustment tool is an adjustable measuring device that can measure the force at the lever end. The position of the adjustment paddle 31 is determined by the measured force, which is used to determine the extension and retraction length of the adjustment support device 32, thereby ensuring the size of the brake gap.
[0025] 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 or improvements 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 paddle adjustment tool, characterized in that, include: The adjustment tool body includes an adjustment block, a hollow outer shell, a spring, a top block, a middle block, a rotating block, and a pin. The adjustment block is inserted into one end of the hollow outer shell, and the rotating block is inserted into the other end of the hollow outer shell. The rotating block is fixed to the hollow outer shell by the pin and can swing along the pin in the hollow outer shell. The adjustment lever is installed at the other end of the rotating block. The spring, top block, and middle block are sequentially arranged between the adjustment block and the rotating block in the hollow outer shell. The top block can move along the axial direction of the hollow outer shell. The adjustment block adjusts the spring force, adjusts the force between the top block, middle block, and rotating block, and thus adjusts whether the rotating block can swing.
2. The brake paddle adjustment tool according to claim 1, characterized in that, The adjusting block is connected to the hollow shell through a threaded structure. The adjusting block moves back and forth when the threads of the hollow shell rotate. When the adjusting block moves back and forth, it compresses or extends the length of the spring.
3. The brake paddle adjustment tool according to claim 1, characterized in that, A scale is designed between the adjustment block and the hollow shell to measure the movement distance of the adjustment block, thereby ensuring the quantification of the adjustment.
4. A brake paddle adjustment tool according to claim 1, characterized in that, There is a gap between the rotating block and the hollow shell, allowing the rotating block to rotate around the pin.
5. A brake paddle adjustment tool according to claim 1, characterized in that, The rotating block and the top block have grooves on their end faces, and the middle block is stuck in the grooves of the rotating block and the top block.
6. A brake paddle adjustment tool according to claim 5, characterized in that, The width of the middle block is smaller than the groove size of the rotating block and the top block, and the grooves of the rotating block and the top block are designed with chamfered structures.
7. A brake paddle adjustment tool according to claim 5 or 6, characterized in that, The grooves of the rotating block and the top block are trapezoidal grooves, and the middle block is a square block, wherein the width of the square block is less than or equal to the width of the bottom of the trapezoidal groove.
8. A brake paddle adjustment tool according to claim 1, characterized in that, The adjustment lever is detachable, allowing for the replacement of different shapes and lengths of adjustment levers to suit different brake pads.