Brake shoe abrasion loss dynamic measuring device

Abstract

The utility model relates to a dynamic measuring device for abrasion loss of a brake shoe. The dynamic measuring device comprises a brake shoe assembly; the detection device is used for measuring the thickness of the brake shoe during braking; the detection end of the detection device is mounted in the mounting hole of the bolt, and the bolt is used for fixing the brake shoe assembly and mounting the detection device on the brake shoe assembly; the protection cover is installed on the plug pin, and the detection device is contained in the protection cover; and the positioning assembly is arranged on the detection device and the bolt and is used for fixing the position of the detection device on the bolt. According to the utility model, the detection device is installed on the bolt, and the bolt can be used for installing the brake shoe assembly and also can be used for installing the matched detection device, so that the detection device can be conveniently and quickly installed and disassembled between the brake shoe assemblies; the detection device is directly installed on the brake shoe assembly, real-time detection can be achieved, the accuracy of brake shoe abrasion loss detection is improved, and the workload of manual overhaul is reduced.

Description

Technical Field

[0001] This utility model relates to the field of brake shoe technology, and in particular to a dynamic measurement device for brake shoe wear. Background Technology

[0002] Currently, most railway freight cars use tread braking, which involves brake shoes pressing against the wheel tread to generate friction in the opposite direction of wheel rotation, thus stopping the wheel's rotation. The friction between the brake shoes and the wheel causes wear and tear on both, with brake shoes wearing out faster. Therefore, brake shoes are consumable brake parts and must be replaced when they reach their wear limit. Railway locomotive and rolling stock maintenance procedures require brake shoes to be replaced when wear reaches their limit during train inspections and repairs. Currently, brake shoe inspection relies primarily on manual visual inspection, which is limited by personnel's time and efficiency, making 100% comprehensive inspection difficult. Random spot checks can easily create safety hazards. Qualitative visual observation is heavily dependent on skill experience and personnel fatigue, making objective and quantitative measurement difficult. Therefore, a dynamic measurement device for brake shoe wear is proposed. Utility Model Content

[0003] This invention provides a dynamic measurement device for brake shoe wear, which solves at least one of the above-mentioned technical problems.

[0004] This utility model provides a dynamic measurement device for brake shoe wear, comprising:

[0005] brake shoe assembly;

[0006] A detection device for measuring the thickness of the brake shoe during braking;

[0007] A pin is provided, and the detection end of the detection device is installed in the mounting hole of the pin. The pin is used to fix the brake shoe assembly and to install the detection device on the brake shoe assembly.

[0008] A protective cover is mounted on the pin, and the detection device is housed inside the protective cover;

[0009] A positioning component is installed on the detection device and the pin to fix the position of the detection device on the pin.

[0010] In one embodiment, the positioning component includes a nut and a washer, both of which are fitted onto the detection device, and the internal thread of the nut engages with the external thread of the detection device, with the washer positioned between the nut and the pin.

[0011] In one embodiment, the gasket is provided with a plurality of fixing plates in the circumferential direction, the fixing plates being able to be bent to hold the sidewalls of the nut and / or the pin.

[0012] In one embodiment, the pin is provided with a plurality of fixing holes for installing fasteners to install the protective cover.

[0013] In one embodiment, the pin has a boss at its center, the head of the pin is bent, and the protective cover is provided between the boss and the head of the pin.

[0014] In one embodiment, the brake shoe assembly includes a brake shoe and a brake shoe support, wherein the brake shoe has a protrusion in the middle and the protrusion is installed in a groove in the brake shoe support.

[0015] In one embodiment, the pin is inserted into the through hole of the protrusion and the through hole of the brake shoe holder to install the brake shoe and the brake shoe holder.

[0016] In one embodiment, the protective cover is located on the side of the pin near the brake shoe.

[0017] In one embodiment, the detection device further includes a cable that passes through the protective cover and is electrically connected to the signal processing unit.

[0018] In one embodiment, the detection device employs a laser rangefinder, an ultrasonic rangefinder, an infrared rangefinder, or a microwave rangefinder.

[0019] Compared with the prior art, the advantages of this utility model are that the detection device is installed on the pin, which can be used to install both the brake shoe assembly and the matching detection device, facilitating the quick installation and disassembly of the detection device between the brake shoe assembly and the brake shoe assembly; the detection device can be directly installed on the brake shoe assembly to realize real-time detection, improve the accuracy of brake shoe wear detection, and reduce the workload of manual maintenance. Attached Figure Description

[0020] The present invention will be described in more detail below based on embodiments and with reference to the accompanying drawings.

[0021] Figure 1 This is a schematic diagram of the measuring device and brake shoe assembly of this utility model;

[0022] Figure 2 This is a schematic diagram of the measuring device structure of this utility model;

[0023] Figure 3 yes Figure 2 Exploded view;

[0024] Figure 4 This is a schematic diagram of the measuring device of this utility model during testing;

[0025] Figure label:

[0026] 1. Pin; 101. Fixing hole; 102. Mounting hole; 103. Boss; 2. Protective cover; 3. Detection device; 4. Positioning assembly; 401. Nut; 402. Washer; 5. Fastener; 6. Brake shoe assembly; 601. Brake shoe; 602. Brake shoe support; 7. Wheel. Detailed Implementation

[0027] The present invention will be further described below with reference to the accompanying drawings.

[0028] Please refer to Figures 1 to 4 This utility model provides a dynamic measurement device for brake shoe wear, including: brake shoe assembly 6, pin 1, detection device 3 and protective cover 2. The detection device 3 is installed on the pin 1 and is used to measure the thickness of the brake shoe 601 during braking. The pin 1 is used to fix the brake shoe assembly 6 and install the detection device 3 on the brake shoe assembly 6. The protective cover 2 is installed on the pin 1 and the detection device 3 is housed inside the protective cover 2.

[0029] During installation, the detection end of the detection device 3 is located on the side of the brake shoe 601 close to the brake shoe support 602. When the brake shoe 601 wears out, the position of the detection device 3 will be closer to the wheel tread during braking.

[0030] To better implement this utility model, refer to Figure 2 and Figure 3 In one embodiment, the detection end of the detection device 3 is installed in the mounting hole 102 of the pin 1. The outer wall of the detection end of the detection device 3 is provided with an external thread, which cooperates with the internal thread of the mounting hole 102 to realize the installation of the detection end. The detection device 3 also includes a cable, which passes through the protective cover 2 and is electrically connected to the signal processing unit.

[0031] The signal processing unit includes a signal receiving and processing module, a microcontroller module, a braking detection module, an alarm module, and a power supply module. The braking detection module is electrically connected to the detection device 3. The ranging sensor is electrically connected to the signal receiving and processing module. The signal receiving and processing module is electrically connected to the microcontroller module. The microcontroller module is electrically connected to the alarm module. The detection device 3, the signal receiving and processing module, the microcontroller module, the braking detection module, and the alarm module are all electrically connected to the power supply module.

[0032] When the brake shoe 601 is not worn, its thickness is L under initial braking conditions. When the vehicle brakes, the brake detection module detects the braking signal and triggers the detection device 3 to measure the thickness of the brake shoe 601. The detection device 3 converts the measured thickness of the brake shoe 601, i.e., the distance from the wheel tread to the detection end of the detection device 3, into an analog signal output. The signal receiving and processing module receives, amplifies, and filters the analog signal to improve signal quality. The microcontroller module reads the signal and calculates the distance M between the detection end of the detection device 3 and the wheel tread during braking. If the difference between distance M and the initial thickness L of the brake shoe 601 is greater than 30mm, the microcontroller module controls the alarm module to issue an alarm, indicating that the brake shoe 601 needs to be replaced. Multiple measurements of distance M can be taken to avoid incorrect judgments about the wear condition of the brake shoe 601 due to mismeasurement.

[0033] To better implement this utility model, refer to Figure 3 In one embodiment, the measuring device further includes a positioning component 4, which includes a nut 401 and a washer 402. Both the nut 401 and the washer 402 are fitted onto the detection device 3, with the internal thread of the nut 401 engaging with the external thread of the detection device 3. The washer 402 is positioned between the nut 401 and the pin 1. The washer 402 has multiple fixing pieces circumferentially arranged, which can be bent to hold the sidewalls of the nut 401 and / or the pin 1. A portion of the fixing pieces of the washer 402 folds upwards to adhere to the side of the nut 401, preventing the nut 401 from rotating, while another portion folds downwards to adhere to the side of the pin 1. The nut 401 is prevented from loosening by the action of the washer 402. Simultaneously, the internal thread of the nut 401 engages with the external thread of the detection device 3, thus fixing the washer 402. Through the actions of the washer 402 and the nut 401, the detection device 3 is protected from vibrations during vehicle operation.

[0034] The retaining plates of the gasket 402 can be bent upwards to hold the nut 401, or bent downwards to fit against the side of the pin 1.

[0035] To better implement this utility model, refer to Figure 3 In one embodiment, the pin 1 has multiple fixing holes 101 for installing fasteners 5 to mount the protective cover 2. In this embodiment, there are two fixing holes 101, symmetrically arranged on the upper and lower sides of the mounting hole 102. The fasteners 5 are rivets or bolts.

[0036] To better implement this utility model, refer to Figure 2 and Figure 3In one embodiment, the pin 1 has a boss 103 in the middle, the head of the pin 1 is bent, and a protective cover 2 is provided between the boss 103 and the head of the pin 1. When the pin 1 is installed on the brake shoe assembly 6, the boss 103 should be higher than the top of the brake shoe 601 to prevent the detection end of the detection device 3 from being blocked by the brake shoe 601. The boss 103 also serves as a limiting function; when the pin 1 is installed, the bottom of the boss 103 abuts against the top of the brake shoe support 602. When the brake shoe 601 needs to be replaced, the pin 1 can be removed from the brake shoe assembly 6 by prying up the boss 103 on the pin 1 or by tapping the tail of the pin 1 upwards.

[0037] To better implement this utility model, refer to Figure 1 In one embodiment, the brake shoe assembly 6 includes a brake shoe 601 and a brake shoe support 602. The brake shoe 601 has a protrusion in the middle, which is installed in the groove of the brake shoe support 602. The pin 1 is inserted into the through hole of the protrusion and the through hole of the brake shoe support 602 to install the brake shoe 601 and the brake shoe support 602.

[0038] To better implement this utility model, refer to Figure 4 In one embodiment, the protective cover 2 is located on the side of the pin 1 near the brake shoe 602.

[0039] To better implement this utility model, refer to Figure 1 In one embodiment, the detection device 3 employs a laser rangefinder, an ultrasonic rangefinder, an infrared rangefinder, or a microwave rangefinder.

[0040] The working principle of the aforementioned dynamic measurement device for brake shoe 601 wear is as follows:

[0041] In the initial, unworn state of the brake shoe 601, its thickness L is measured. During braking, the brake shoe 601 contacts the wheel tread and wears down. The thickness M of the brake shoe 601 is measured during braking. An alarm is triggered when the difference between M and L exceeds 30mm, indicating that the brake shoe 601 can be replaced. To replace the brake shoe 601, pry up the protrusion 103 of the pin 1 or tap the tail of the pin 1 upwards to remove it from above the brake shoe support 602, after which the brake shoe 601 can be removed. When installing the brake shoe 601, insert the protrusion of the brake shoe 601 into the groove of the brake shoe support 602, then insert the pin 1 through the upper through-hole of the brake shoe support 602, pressing down firmly on the bent head of the pin 1 until it is properly installed. This measuring device not only enables real-time detection of the wear condition of the brake shoe 601 but also facilitates the disassembly and installation of the brake shoe 601.

[0042] Although the present invention has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of the invention. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A dynamic measuring device for brake shoe wear, characterized in that, include: brake shoe assembly; A detection device for measuring the thickness of the brake shoe during braking; A pin is provided, and the detection end of the detection device is installed in the mounting hole of the pin. The pin is used to fix the brake shoe assembly and to install the detection device on the brake shoe assembly. A protective cover is mounted on the pin, and the detection device is housed inside the protective cover; A positioning component is installed on the detection device and the pin to fix the position of the detection device on the pin.

2. The dynamic measuring device for brake shoe wear according to claim 1, characterized in that, The positioning component includes a nut and a washer, both of which are sleeved on the detection device, and the internal thread of the nut engages with the external thread of the detection device, with the washer positioned between the nut and the pin.

3. The dynamic measuring device for brake shoe wear according to claim 2, characterized in that, The gasket has multiple fixing pieces around its circumference, and the fixing pieces can be bent to hold the side wall of the nut and / or the pin.

4. The dynamic measuring device for brake shoe wear according to claim 3, characterized in that, The pin has multiple fixing holes, which are used to install fasteners to install the protective cover.

5. The dynamic measuring device for brake shoe wear according to claim 1 or 4, characterized in that, The pin has a boss in the middle, the head of the pin is bent, and the protective cover is provided between the boss and the head of the pin.

6. The dynamic measuring device for brake shoe wear according to claim 1, characterized in that, The brake shoe assembly includes a brake shoe and a brake shoe support. The brake shoe has a protrusion in the middle, and the protrusion is installed in the groove of the brake shoe support.

7. The dynamic measuring device for brake shoe wear according to claim 6, characterized in that, The pin is inserted into the through hole of the protrusion and the through hole of the brake shoe holder to install the brake shoe and the brake shoe holder.

8. The dynamic measuring device for brake shoe wear according to claim 7, characterized in that, The protective cover is located on the side of the pin near the brake shoe.

9. The dynamic measuring device for brake shoe wear according to claim 7, characterized in that, The detection device also includes a cable that passes through the protective cover and is electrically connected to the signal processing unit.

10. The dynamic measuring device for brake shoe wear according to claim 1, characterized in that, The detection device employs a laser rangefinder, an ultrasonic rangefinder, an infrared rangefinder, or a microwave rangefinder.

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