A kind of identification device and adjusting method for dry plate brake pressurization state

Abstract

The present application belongs to the technical field of vehicle braking, and particularly relates to a device for identifying the pressure state of a dry-plate brake and an adjusting method. The device is used for identifying and checking the pressure position of the dry-plate brake and guiding the adjusting time of the pressure device. The pressure device comprises an outer-toothed pressure plate, a pressure support body and a billiard disc. The brake pressure state identification structure comprises a support column with position limit identification, a spring, a position identification structure and a locking structure. Based on the working principle and structural features of the dry-plate brake, the pressure state identification structure is designed and the pressure device adjusting strategy is formulated, so that the state of the brake pressure component and the wear condition of the friction component can be conveniently obtained, and the pressure device can be timely adjusted to ensure the braking safety.

Description

Technical Field

[0001] This invention belongs to the field of vehicle braking technology, specifically relating to an indicator device and adjustment method for the pressurization state of a dry-plate brake. Background Technology

[0002] Dry-plate brakes are mechanisms used to decelerate or stop vehicles, maintain the speed of vehicles traveling downhill, and keep stationary vehicles (including on slopes) in place. A dry-plate brake consists of two main functional components: a pressurizing device and a friction device. During braking, the pressurizing device moves axially to eliminate braking gaps and provides positive pressure to the friction components. When the brake is released, the pressurizing device returns to its original position under the action of a spring. As the friction components wear, when the pressure or stroke provided by the pressurizing device is insufficient to meet braking requirements, the relative position of the pressurizing device must be adjusted to meet the brake's operating requirements. Therefore, brake pressurization and wear conditions are important indicators of vehicle brake performance and reliability, directly affecting vehicle safety. Because the power compartment of tracked vehicles is relatively enclosed, the brake's operating condition (including whether it returns to its original position and its wear) cannot be checked without removing the power transmission unit. Dry-plate brakes are characterized by their compact structure and long-term operation in harsh environments such as high temperatures and sandstorms, resulting in the difficulty, high cost, and low reliability of manufacturing dedicated displacement testing sensors. Therefore, it is necessary to propose an identification device and adjustment strategy for the pressurization status of dry-plate brakes, aiming to solve the problem of reduced vehicle safety and reliability due to untimely adjustment of brake wear. Summary of the Invention

[0003] (a) Technical problems to be solved

[0004] The technical problem to be solved by this invention is: given the inconvenience of checking the usage status of dry disc brakes on vehicles, and considering their structural characteristics, working principle, and environmental requirements, how to propose an identification device for the pressurization status of dry disc brakes, and propose adjustment strategies to solve the problem of reduced brake performance and reliability due to the inconvenience of checking the usage status of brakes and the inability to obtain timely information on the wear of friction components.

[0005] (II) Technical Solution

[0006] To solve the above-mentioned technical problems, the present invention provides an identification device for the pressurized state of a dry-plate brake, the identification device being used to identify the working state of the external tooth pressure plate of the dry-plate brake.

[0007] The dry disc brake includes an external tooth pressure plate 1, a pressure support body 2, a ball disc 3, and a friction component 4;

[0008] The external toothed pressure plate 1 is provided with a threaded or pin-shaped connecting hole, and the pressure support body 2 is provided with a through hole or groove.

[0009] The external tooth pressure plate 1 and the ball bearing 3 are disposed inside the pressure support body 2, and the pressure support body 2 forms the outer contour of the dry disc brake. The pressure support body 2 is provided with a limiting component to restrict the rotation of the external tooth pressure plate 1. During braking, the ball bearing 3 rotates, thereby driving the external tooth pressure plate 1 to move axially, pushing the friction component 4 to eliminate the friction gap and implement friction braking. As the friction component 4 wears, the axial movement stroke of the external tooth pressure plate 1 increases.

[0010] The marking device includes: a support column with position limit markings, a spring 6, a position marking structure, and a locking component; the support column is installed axially in the connecting hole of the external tooth pressure plate 1 and is tightly integrated with the external tooth pressure plate 1. Since the external tooth pressure plate 1 is located inside the pressure support body 2, the end of the support column with the position limit markings passes through a pre-set through hole or groove on the pressure support body 2 and extends to the outside of the pressure support body 2; and the spring 6, the position marking structure, and the locking component are sequentially sleeved on the support column. One end of the spring 6 is connected to the external tooth pressure plate 1, and the other end is connected to one end of the position marking structure, and provides preload to prevent the position marking structure from moving towards the external tooth pressure plate 1. The locking component is set at the other end of the position marking structure to fasten the position marking structure to the support column;

[0011] In the initial state, there is a certain distance between the fastening position of the locking component on the support column and the position limit mark.

[0012] The pre-set through holes or grooves on the pressure support 2 are through holes or through grooves.

[0013] The support column is a stud 5, and the position limit mark on it is a colored mark set at one end.

[0014] The locking component is a locking nut 8.

[0015] The position marking structure is a colored marking nut 7, and the color of the marking nut 7 is different from the color of the position limit marking of the stud 5.

[0016] The position marking structure is positioned on the support column such that, in the non-braking driving state, the colored portion of the position marking structure is fully exposed to the outside of the pressure support 2.

[0017] The position marking structure on the support column is set as follows: in the initial braking state where the friction pad is not worn, when the outer tooth pressure plate 1 moves axially to press the friction component 4, the colored part of the position marking structure is exposed on the outside of the pressure support body, and the preset engraving line on it is aligned with the end face of the outer wall of the pressure support body 2.

[0018] The position marking structure on the support column is configured such that when the friction component 4 wears down, the axial travel of the outer toothed pressure plate 1 increases as it moves axially to press against the friction component 4. This causes the preset etched line on the colored portion of the position marking structure to begin entering the interior of the pressure support 2. When the colored portion of the position marking structure is completely inside the pressure support 2, it indicates that the outer toothed pressure plate 1 cannot provide sufficient braking force to the friction plate, and the position of the ball bearing 3 needs to be adjusted to ensure a good braking clearance. Each time the position of the ball bearing 3 is adjusted, the support column moves axially, meaning the portion of the support column extending outside the pressure support 2 gradually shortens, thereby gradually shortening the distance between the position limit marking on the outer end and the locking component.

[0019] After several adjustments to the position of the pin 3, the support column continues to enter the pressure support body 2 axially. When the position limit mark of the support column begins to be blocked by the locking structure and the position mark structure completely disappears inside the pressure support body 2, it indicates that the wear of the friction component 4 has reached the wear limit and the brake needs to be replaced.

[0020] Furthermore, the present invention also provides an adjustment method for the pressurization state of a dry-plate brake, the adjustment method being implemented based on the aforementioned marking device for the pressurization state of a dry-plate brake, wherein the ball disc 3 of the dry-plate brake is inside the pressurization support 2, during braking, the ball disc 3 drives the external tooth pressure plate 1 to move axially to eliminate friction gaps and press the friction component 4, thereby achieving deceleration and stopping under the action of friction torque, and as the friction component 4 wears, the axial movement stroke of the external tooth pressure plate 1 increases;

[0021] The adjustment method includes the following steps:

[0022] Step 1: Connect the support column with the position limit mark to the external tooth pressure plate 1 by means of thread or pin;

[0023] Step 2: Install a spring, a position marking structure, and a locking structure sequentially on the support column with the position limit marking. One end of the position marking structure is connected to the spring, and the other end is connected to the locking structure. One side of the spring presses against the external toothed pressure plate, and the other side presses against the position marking structure, providing pressure to the nut. The locking structure then locks the position marking structure in place.

[0024] Step 3: In the non-braking driving state, the colored portion of the position marking structure is fully exposed to the outside of the pressure support 2;

[0025] Step 4: In the initial braking state where the friction pads are not worn, when the outer tooth pressure plate 1 moves axially to press the friction component 4, the colored part of the position marking structure is exposed on the outside of the pressure support body, and the preset engraving line on it is aligned with the end face of the outer wall of the pressure support body 2.

[0026] Step 5: After the friction component 4 wears out, when the outer tooth pressure plate 1 moves axially to press the friction component 4, its axial stroke will increase, causing the preset etched line position on the colored part of the position marking structure to begin to enter the interior of the pressure support body 2. When the colored part of the position marking structure is completely inside the pressure support body 2, it indicates that the outer tooth pressure plate 1 cannot provide sufficient braking force to the friction plate, and the position of the ball bearing 3 needs to be adjusted to ensure a good braking clearance. Each time the position of the ball bearing 3 is adjusted, the support column will move axially, that is, the part of the support column extending outside the pressure support body 2 will gradually shorten, thereby gradually shortening the distance between the position limit mark on the outer end and the locking component.

[0027] Step 6: After several adjustments to the position of the pin 3, the support column continues to enter the pressure support body 2 axially. When the position limit mark of the support column begins to be blocked by the locking structure and the position mark structure completely disappears inside the pressure support body 2, it indicates that the wear of the friction component 4 has reached the wear limit and the brake needs to be replaced.

[0028] (III) Beneficial Effects

[0029] Compared with existing technologies, this invention designs a pressure-status identification device and adjustment method for the pressure-pressurizing device of dry-plate brakes. It features identification and inspection of the brake pressure position and guides the timing of pressure-pressurizing device adjustments, facilitating routine inspections of the brakes by drivers or maintenance personnel. This solves the problems of inconvenient measurement and inspection of such brakes in the confined space of the engine compartment, and low braking efficiency or even safety issues caused by untimely brake pressure adjustments. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the pressure status indicator device for a dry disc brake.

[0031] Figure 2 This is a schematic diagram showing the location of the vehicle status indicator device.

[0032] Figure 3 This is a schematic diagram showing the location of the initial braking status indicator device.

[0033] Figure 4 This is a schematic diagram showing the location of the device indicating normal operating status.

[0034] Figure 5 This is a diagram showing the adjustment of the position of the warning status indicator device.

[0035] Figure 6 This is a schematic diagram showing the location of the friction limit state indicator device. Detailed Implementation

[0036] To make the objectives, contents, and advantages of the present invention clearer, the specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples.

[0037] To solve the above-mentioned technical problems, the present invention provides an identification device for the pressurized state of a dry-plate brake, the identification device being used to identify the working state of the external tooth pressure plate of the dry-plate brake.

[0038] The dry disc brake includes an external tooth pressure plate 1, a pressure support body 2, a ball disc 3, and a friction component 4;

[0039] The external toothed pressure plate 1 is provided with a threaded or pin-shaped connecting hole, and the pressure support body 2 is provided with a through hole or groove.

[0040] The external tooth pressure plate 1 and the ball bearing 3 are disposed inside the pressure support body 2, and the pressure support body 2 forms the outer contour of the dry disc brake. The pressure support body 2 is provided with a limiting component to restrict the rotation of the external tooth pressure plate 1. During braking, the ball bearing 3 rotates, thereby driving the external tooth pressure plate 1 to move axially, pushing the friction component 4 to eliminate the friction gap and implement friction braking. As the friction component 4 wears, the axial movement stroke of the external tooth pressure plate 1 increases.

[0041] The marking device includes: a support column with position limit markings, a spring 6, a position marking structure, and a locking component; the support column is installed axially in the connecting hole of the external tooth pressure plate 1 and is tightly integrated with the external tooth pressure plate 1. Since the external tooth pressure plate 1 is located inside the pressure support body 2, the end of the support column with the position limit markings passes through a pre-set through hole or groove on the pressure support body 2 and extends to the outside of the pressure support body 2; and the spring 6, the position marking structure, and the locking component are sequentially sleeved on the support column. One end of the spring 6 is connected to the external tooth pressure plate 1, and the other end is connected to one end of the position marking structure, and provides preload to prevent the position marking structure from moving towards the external tooth pressure plate 1. The locking component is set at the other end of the position marking structure to fasten the position marking structure to the support column;

[0042] In the initial state, there is a certain distance between the fastening position of the locking component on the support column and the position limit mark.

[0043] The pre-set through holes or grooves on the pressure support 2 are through holes or through grooves.

[0044] The support column is a stud 5, and the position limit mark on it is a colored mark set at one end.

[0045] The locking component is a locking nut 8.

[0046] The position marking structure is a colored marking nut 7, and the color of the marking nut 7 is different from the color of the position limit marking of the stud 5.

[0047] The position marking structure is positioned on the support column such that, in the non-braking driving state, the colored portion of the position marking structure is fully exposed to the outside of the pressure support 2.

[0048] The position marking structure on the support column is set as follows: in the initial braking state where the friction pad is not worn, when the outer tooth pressure plate 1 moves axially to press the friction component 4, the colored part of the position marking structure is exposed on the outside of the pressure support body, and the preset engraving line on it is aligned with the end face of the outer wall of the pressure support body 2.

[0049] The position marking structure on the support column is configured such that when the friction component 4 wears down, the axial travel of the outer toothed pressure plate 1 increases as it moves axially to press against the friction component 4. This causes the preset etched line on the colored portion of the position marking structure to begin entering the interior of the pressure support 2. When the colored portion of the position marking structure is completely inside the pressure support 2, it indicates that the outer toothed pressure plate 1 cannot provide sufficient braking force to the friction plate, and the position of the ball bearing 3 needs to be adjusted to ensure a good braking clearance. Each time the position of the ball bearing 3 is adjusted, the support column moves axially, meaning the portion of the support column extending outside the pressure support 2 gradually shortens, thereby gradually shortening the distance between the position limit marking on the outer end and the locking component.

[0050] After several adjustments to the position of the pin 3, the support column continues to enter the pressure support body 2 axially. When the position limit mark of the support column begins to be blocked by the locking structure and the position mark structure completely disappears inside the pressure support body 2, it indicates that the wear of the friction component 4 has reached the wear limit and the brake needs to be replaced.

[0051] That is, such as Figure 5 and Figure 6 As shown, Figure 5 The central support column is stud 5. A horizontal line is located on the upper part of stud 5, and above this line are color-coded position limit markers. Figure 5 In the middle, the colored position limit mark is completely above the locking structure implemented by the lock nut 8, and when it reaches... Figure 6The colored position limit indicator has begun to be obscured by the locking nut 8, and the position indicator structure implemented by the colored indicator nut 7 has completely disappeared inside the pressure support body 2, indicating that the wear of the friction component 4 has reached the wear limit and the brake needs to be replaced.

[0052] Furthermore, the present invention also provides an adjustment method for the pressurization state of a dry-plate brake, the adjustment method being implemented based on the aforementioned marking device for the pressurization state of a dry-plate brake, wherein the ball disc 3 of the dry-plate brake is inside the pressurization support 2, during braking, the ball disc 3 drives the external tooth pressure plate 1 to move axially to eliminate friction gaps and press the friction component 4, thereby achieving deceleration and stopping under the action of friction torque, and as the friction component 4 wears, the axial movement stroke of the external tooth pressure plate 1 increases;

[0053] The adjustment method includes the following steps:

[0054] Step 1: Connect the support column with the position limit mark to the external tooth pressure plate 1 by means of thread or pin;

[0055] Step 2: Install a spring, a position marking structure, and a locking structure sequentially on the support column with the position limit marking. One end of the position marking structure is connected to the spring, and the other end is connected to the locking structure. One side of the spring presses against the external toothed pressure plate, and the other side presses against the position marking structure, providing pressure to the nut. The locking structure then locks the position marking structure in place.

[0056] Step 3: In the non-braking driving state, the colored portion of the position marking structure is fully exposed to the outside of the pressure support 2;

[0057] Step 4: In the initial braking state where the friction pads are not worn, when the outer tooth pressure plate 1 moves axially to press the friction component 4, the colored part of the position marking structure is exposed on the outside of the pressure support body, and the preset engraving line on it is aligned with the end face of the outer wall of the pressure support body 2.

[0058] Step 5: After the friction component 4 wears out, when the outer tooth pressure plate 1 moves axially to press the friction component 4, its axial stroke will increase, causing the preset etched line position on the colored part of the position marking structure to begin to enter the interior of the pressure support body 2. When the colored part of the position marking structure is completely inside the pressure support body 2, it indicates that the outer tooth pressure plate 1 cannot provide sufficient braking force to the friction plate, and the position of the ball bearing 3 needs to be adjusted to ensure a good braking clearance. Each time the position of the ball bearing 3 is adjusted, the support column will move axially, that is, the part of the support column extending outside the pressure support body 2 will gradually shorten, thereby gradually shortening the distance between the position limit mark on the outer end and the locking component.

[0059] Step 6: After several adjustments to the position of the pin 3, the support column continues to enter the pressure support body 2 axially. When the position limit mark of the support column begins to be blocked by the locking structure and the position mark structure completely disappears inside the pressure support body 2, it indicates that the wear of the friction component 4 has reached the wear limit and the brake needs to be replaced.

[0060] Step 6, as described Figure 5 and Figure 6 As shown, Figure 5 The central support column is stud 5. A horizontal line is located on the upper part of stud 5, and above this line are color-coded position limit markers. Figure 5 In the middle, the colored position limit mark is completely above the locking structure implemented by the lock nut 8, and when it reaches... Figure 6 The colored position limit indicator has begun to be obscured by the locking nut 8, and the position indicator structure implemented by the colored indicator nut 7 has completely disappeared inside the pressure support body 2, indicating that the wear of the friction component 4 has reached the wear limit and the brake needs to be replaced.

[0061] Example 1

[0062] Dry-plate brakes are typically installed in a sealed engine compartment and operate in harsh environments such as high temperatures and dust for extended periods. After continuous or frequent high-intensity braking, brake wear accelerates. If this wear is not detected and adjusted in time, it can lead to reduced braking efficiency and even compromise vehicle safety. The complex environmental factors of special vehicles limit the application of traditional displacement sensors, and the significant vibrations and shocks during vehicle operation and braking also greatly reduce sensor reliability. This embodiment proposes a device for indicating the pressurization status of dry-plate brakes, enabling the inspection of the brake pressurization device's operational status. Its simple, robust mechanical structure facilitates operation and is unaffected by environmental factors and vibrations. Furthermore, an adjustment strategy for the pressurization device is developed based on the brake's working principle, reducing the probability of brake failure due to untimely brake pressurization adjustments.

[0063] Reference Figure 1 The dry disc brake includes an external toothed pressure plate 1, a pressure support body 2, a ball bearing 3, and a friction component 4. During braking, the ball bearing 3 rotates, driving the external toothed pressure plate 1 to move axially to eliminate the braking gap and push the friction component 4 to the pressing position. Under the action of friction torque, the vehicle decelerates and stops. During the braking process, the friction component 4 experiences wear. As the wear intensifies, the axial displacement of the external toothed pressure plate 1 gradually increases.

[0064] The pressurization status marking device of the present invention includes: a stud 5 with a red marking at the tail, a spring 6, a yellow marking nut 7, and a locking nut 8; the stud 5 with a red marking at the tail is threaded onto the external tooth pressure plate 1, and the marked end passes through a reserved hole on the pressurization support body 2; the spring 6, the yellow marking nut 7, and the locking nut 8 are respectively installed on the stud 5.

[0065] Reference Figure 2 The brakes are not engaged while the vehicle is in motion, and the yellow-marked nut 7 is fully exposed on the outside of the pressure support.

[0066] Reference Figure 3 In the initial braking state, the friction pads are not worn. The outer tooth pressure plate 1 moves axially to press the friction component 4. The yellow-marked nut 7 is partially exposed on the outside of the pressure support body 2, and the engraving line on it is aligned with the end face of the pressure support body 2.

[0067] Reference Figure 4 Under normal use, the friction plate wears out. When the outer toothed pressure plate 1 moves axially to press the friction component 4, the position marked by the yellow nut 7 begins to enter the pressure support body 2.

[0068] Reference Figure 5 Adjust the warning status. When the yellow indicator nut 7 is fully inserted into the pressure support body 2, it indicates that the external tooth pressure plate 1 cannot provide sufficient braking force to the friction plate. The position of the ball disc 3 needs to be adjusted to ensure a good braking clearance.

[0069] Reference Figure 6 The friction limit state is reached when the red mark at the tail of the stud 5 is covered by the locking nut 8 and the yellow mark nut 7 completely disappears, indicating that the wear limit has been reached and the brake needs to be replaced.

[0070] In this invention, the number of pressure status indicator devices is not limited to one, but can be determined according to the actual usage requirements of different brakes.

[0071] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A device for identifying the pressurization state of a dry-plate brake, characterized by, The marking device is used to mark the working status of the external tooth pressure plate of the dry disc brake. The dry disc brake includes an external tooth pressure plate (1), a pressure support body (2), a ball disc (3), and a friction component (4). The external toothed pressure plate (1) is provided with a threaded or pin-shaped connection hole, and the pressure support body (2) is provided with a through hole or groove; The external tooth pressure plate (1) and the ball disc (3) are disposed inside the pressure support body (2), and the pressure support body (2) forms the outer contour of the dry plate brake; wherein, the pressure support body (2) is provided with a limiting component to restrict the rotation of the external tooth pressure plate (1). When braking, the ball disc (3) rotates, thereby driving the external tooth pressure plate (1) to move axially, pushing the friction component (4) to eliminate the friction gap and implement friction braking; as the friction component (4) wears, the axial movement stroke of the external tooth pressure plate (1) increases; The marking device includes: a support column with position limit markings, a spring (6), a position marking structure, and a locking component; the support column is installed axially in the connecting hole of the external tooth pressure plate (1) and is tightly integrated with the external tooth pressure plate (1). Since the external tooth pressure plate (1) is set inside the pressure support body (2), the end of the support column with position limit markings passes through the pre-set through hole or groove on the pressure support body (2) and extends to the outside of the pressure support body (2); and the spring (6), the position marking structure, and the locking component are sequentially sleeved on the support column. One end of the spring (6) is connected to the external tooth pressure plate (1), and the other end is connected to one end of the position marking structure, and provides pre-pressure to prevent the position marking structure from moving towards the external tooth pressure plate (1). A locking component is set at the other end of the position marking structure to fasten the position marking structure to the support column. In the initial state, there is a certain distance between the fastening position of the locking component on the support column and the position limit mark; The pre-set through hole or groove on the pressure support (2) is a through hole or through groove; The support column is a stud (5), and the position limit mark on it is a colored mark set at one end of it; The locking component is a locking nut (8). The position marking structure is a colored marking nut (7), and the color of the marking nut (7) is different from the color of the position limit marking of the stud (5); The position marking structure is set to the following state on the support column: in the non-braking driving state, the color part of the position marking structure is completely exposed to the outside of the pressure support (2); The position marking structure is set to the following state on the support column: when the friction plate is not worn in the initial braking state, when the outer tooth pressure plate (1) moves axially to press the friction component (4), the color part of the position marking structure is exposed on the outside of the pressure support body, and the preset engraving line set on it is aligned with the end face of the outer wall of the pressure support body (2). The position marking structure on the support column is set as follows: after the friction component (4) is worn, when the outer tooth pressure plate (1) moves axially to press the friction component (4), its axial stroke will increase, so that the preset etched line position on the color part of the position marking structure begins to enter the interior of the pressure support body (2). When the color part of the position marking structure completely enters the interior of the pressure support body (2), it indicates that the outer tooth pressure plate (1) cannot provide sufficient braking force to the friction plate, and the position of the ball disc (3) needs to be adjusted to ensure a good braking gap. Each time the position of the ball disc (3) is adjusted, the support column will move axially, that is, the part of the support column extending outside the pressure support body (2) will gradually shorten, thereby gradually shortening the distance between the position limit mark on the outer end and the locking component.

2. The device for identifying a pressurization state of a dry-plate brake according to claim 1, characterized by, After several adjustments to the position of the pin disc (3), the support column continues to enter the pressure support body (2) axially. When the position limit mark of the support column begins to be blocked by the locking structure and the position mark structure completely disappears inside the pressure support body (2), it indicates that the wear of the friction component (4) has reached the wear limit and the brake needs to be replaced.

3. A method for adjusting the pressing state of a dry-plate brake, which is implemented in accordance with the identification device for the pressing state of a dry-plate brake according to claim 2, wherein, The ball bearing disc (3) of the dry disc brake is located inside the pressure support body (2). During braking, the ball bearing disc (3) drives the external toothed pressure plate (1) to move axially to eliminate friction gaps and press against the friction components (4). Under the action of friction torque, deceleration and stopping are achieved. As the friction components (4) wear, the axial movement stroke of the external toothed pressure plate (1) increases. Its characteristic is that... The adjustment method includes the following steps: Step 1: Connect the support column with the position limit mark to the external tooth pressure plate (1) by means of thread or pin; Step 2: Install a spring, a position marking structure, and a locking structure sequentially on the support column with the position limit marking. One end of the position marking structure is connected to the spring, and the other end is connected to the locking structure. One side of the spring presses against the external toothed pressure plate, and the other side presses against the position marking structure, providing pressure to the nut. The locking structure then locks the position marking structure in place. Step 3: In the non-braking driving state, the colored part of the position marking structure is fully exposed to the outside of the pressure support (2); Step 4: In the initial braking state where the friction pads are not worn, when the outer tooth pressure plate (1) moves axially to press the friction component (4), the colored part of the position marking structure is exposed on the outside of the pressure support body, and the preset engraving line set on it is aligned with the end face of the outer wall of the pressure support body (2). Step 5: After the friction component (4) wears out, when the outer tooth pressure plate (1) moves axially to press the friction component (4), its axial stroke will increase, so that the preset etched line position on the color part of the position marking structure begins to enter the interior of the pressure support body (2). When the color part of the position marking structure completely enters the interior of the pressure support body (2), it indicates that the outer tooth pressure plate (1) cannot provide sufficient braking force to the friction plate, and the position of the ball disc (3) needs to be adjusted to ensure a good braking clearance. Each time the position of the ball disc (3) is adjusted, the support column will move axially, that is, the part of the support column extending outside the pressure support body (2) will gradually shorten, thereby gradually shortening the distance between the position limit mark on the outer end and the locking component. Step 6: After several adjustments to the position of the ball bearing (3), the support column continues to enter the pressure support body (2) axially. When the position limit mark of the support column begins to be blocked by the locking structure and the position mark structure completely disappears inside the pressure support body (2), it indicates that the wear of the friction component (4) has reached the wear limit and the brake needs to be replaced.

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