Contact type temperature monitoring and abrasion monitoring device for lossless installation of brake pad

Abstract

The invention relates to a contact type temperature monitoring and abrasion monitoring device for lossless installation of a brake pad. The contact type temperature monitoring and abrasion monitoring device comprises a shell, a temperature probe, an adjusting rod, a sliding assembly, a reset spring, a one-way gear bearing, a spring, an angle position encoder and a reset knob. The one-way gear bearing is arranged in the front end of the shell; the angle position encoder is arranged on the outer side of the front end of the shell and is correspondingly connected with the one-way gear bearing; the spring is mounted on the pin shaft; the sliding assembly is arranged on the rear side of the one-way gear bearing, is meshed with the one-way gear bearing and is in clearance fit with the shell; a reset spring is arranged between the sliding assembly and the shell. The temperature probe is connected to the rear side of the sliding assembly through an adjusting rod. One end of the reset knob penetrates through the shell and then is correspondingly connected with the rear side of the one-way gear bearing. The temperature probe can be automatically adjusted to be kept at the optimal temperature measurement position according to the abrasion degree of the brake pad, lossless temperature measurement is conducted on the brake pad, the abrasion condition of the brake pad is monitored, and the repeated utilization rate is high.

Description

Technical Field

[0001] The invention relates to the technical field of air brake technology for rail transit vehicles, and in particular to a contact-type temperature monitoring and wear monitoring device for non-destructive installation of brake pads. Background Art

[0002] The braking force of the air brake system of rail transit vehicles is usually applied by friction braking, in which the disc brake generates braking force through the friction between the brake pad and the brake disc. The maximum temperature of the brake pad and the brake disc has an upper limit, generally 300℃~350℃. If this temperature limit is exceeded, the brake pad and the brake disc will be damaged and need to be replaced or repaired.

[0003] At present, when a vehicle undergoes a thermal capacity type test, it is necessary to drill holes in the run-in brake pads and fix the temperature measuring equipment to collect the pad temperature. However, this method requires the brake pads to be dismantled, punched, and installed, which may damage them. Generally, the punched brake pads need to be scrapped after the test is completed. During normal operation, in order not to damage the brake pads, it is impossible to install temperature monitoring equipment to monitor the temperature of the brake pads in real time. Therefore, in the event of a vehicle electric brake failure, in order to prevent the brake pad temperature from being too high, the vehicle is operated at a lower speed limit, which affects the normal operating efficiency; and results in the loss of an important parameter, the real-time operating temperature of the brake pads, in the field of intelligent vehicle operation and maintenance.

[0004] In the prior art, in order to ensure safety, the wear degree of the brake pads needs to be checked before each departure to decide whether to replace new brake pads. The inspection is inconvenient and the inspection environment is harsh. There is a certain degree of safety risk, which also increases the workload. Summary of the invention

[0005] In view of the above problems, the purpose of the present invention is to provide a contact temperature monitoring and wear monitoring device that can be installed non-destructively on the brake pad, which can automatically adjust the temperature probe to keep it in the optimal position for temperature measurement according to the degree of wear of the brake pad, and can measure the temperature and monitor the wear of the brake pad non-destructively, and has high reusability.

[0006] The technical solution adopted by the present invention is as follows:

[0007] The present invention proposes a contact temperature monitoring and wear monitoring device for non-destructive installation of a brake pad, comprising a shell, a temperature probe, an adjusting rod, a sliding assembly, a reset spring, a one-way gear bearing, a spring, an angle position encoder and a reset knob; the one-way gear bearing is arranged inside the front end of the shell; the angle position encoder is arranged outside the front end of the shell, and its inner ring is correspondingly connected with the inner ring key pin of the one-way gear bearing, and the outer ring is correspondingly fixedly connected with the outer ring of the one-way gear bearing through a pin shaft; the spring is correspondingly installed on the pin shaft, and its two ends respectively abut against the outer ring of the one-way gear bearing and the outer ring of the angle position encoder; the sliding assembly is correspondingly arranged on the rear side of the one-way gear bearing and meshed with its outer ring gear, and the sliding assembly and the shell are clearance-matched along the wear direction of the brake pad; a reset spring is arranged between the sliding assembly and the shell in a direction perpendicular to the brake disc; the temperature probe is connected to the rear side of the sliding assembly through the adjusting rod; one end of the reset knob passes through the shell and is correspondingly connected to the rear side of the one-way gear bearing.

[0008] Furthermore, the sliding assembly includes a sliding block and a contact ball; a groove structure is opened inside the sliding block, and a sliding groove is opened in the middle along the wear direction of the brake pad, and the sliding groove corresponds to the clearance of the housing; the outer edge of the sliding block corresponding to the one-way gear bearing is provided with a rack meshing with the outer ring gear of the one-way gear bearing; and a contact ball is installed on the surface of the sliding block corresponding to the brake disc.

[0009] Furthermore, there is a clearance fit between the contact ball and the sliding block.

[0010] Furthermore, a probe harness is provided at one end of the temperature probe.

[0011] Furthermore, the temperature probe is in direct contact with the brake pad and a gap of 0.8-1.2 mm is maintained at the closest point to the brake disc.

[0012] Furthermore, the temperature probe is preferably a thermocouple, which is externally connected to a data processing device via a probe harness.

[0013] Furthermore, an encoder harness is provided at the outer end of the angle position encoder; and the encoder harness is externally connected to a data processing device.

[0014] Furthermore, the inner ring of the one-way gear bearing is a one-way bearing, and the outer ring is an external gear, which can only rotate along the wear direction of the brake pad and is locked if it rotates in the opposite direction.

[0015] Furthermore, the inner ring of the one-way gear bearing is connected to the inner ring of the angle position encoder by a key pin, which can only produce relative displacement in the axial direction but not relative rotation; the outer ring of the one-way gear bearing is coaxially fixed to the outer ring of the angle position encoder by a plurality of pins, which can realize coaxial rotation and axial relative displacement.

[0016] Furthermore, the reset knob and the housing are threadedly connected. When the reset knob is rotated in one direction, the one-way gear bearing can move toward the rear side of the housing under the action of the spring, so that the outer gear of the one-way gear bearing loses engagement with the rack of the sliding assembly; when the reset knob is rotated in the other direction, the one-way gear bearing can compress the spring and then restore its outer gear to re-engage with the rack of the sliding assembly.

[0017] Furthermore, the combined force of the friction resistance of the housing on the sliding assembly and the compressive elastic force of the return spring is smaller than the thrust of the brake disc on the contact ball, but larger than the force exerted on the sliding assembly along the wear direction of the brake pad due to vibration or gravel.

[0018] Furthermore, the compressive elastic force of the return spring is greater than the friction resistance generated by the housing on the sliding assembly.

[0019] Furthermore, the maximum displacement of the sliding component relative to the interior of the housing is greater than the sum of the wear limit thickness of the brake pad and the maximum wear of the contact ball.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] The present invention proposes a contact temperature monitoring and wear monitoring device for non-destructive installation of the brake pad, which can monitor and display the temperature of the brake pad and monitor its wear in real time, is independent of the brake pad, and does not require destructive operations such as opening holes in the brake pad; the position of the temperature probe is automatically adjusted to the optimal temperature measurement point according to the wear of the brake pad; after the brake pad is worn to a limit, it can be automatically reset by operating the knob and the reset spring, and the device can be reused; in the relief state, the device has no contact with the brake disc, and the replacement cycle is long; the device is convenient and reliable to use and easy to install. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of a contact-type temperature monitoring and wear monitoring device for non-destructive installation of a brake pad proposed by the present invention;

[0023] Figure 2 yes Figure 1 A schematic diagram of the cross-sectional structure of;

[0024] Figure 3 is a schematic diagram of the structure of the sliding assembly;

[0025] Figure 4 It is a schematic diagram of the installation structure of the present invention and the brake piece;

[0026] Figure 5 is a side view of the relative position of the present invention and the brake disc;

[0027] Figure 6 It is a schematic diagram of the relative position of the present invention and the brake disc during braking;

[0028] Figure 7 is a schematic diagram of the relative position of the present invention and the brake disc during release;

[0029] Figure 8 It is a structural schematic diagram of the one-way gear bearing and the sliding component being disengaged.

[0030] Among them, the figure markings are: 1-housing; 2-temperature probe; 21-probe wiring harness; 3-adjusting rod; 4-sliding assembly; 41-contact ball; 5-reset spring; 6-one-way gear bearing; 7-spring; 8-angle position encoder; 81-encoder wiring harness; 9-reset knob; 10-brake pad; 11-brake disc. DETAILED DESCRIPTION

[0031] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0032] It should be noted that, in the description of the present invention, the terms "up", "down", "top", "bottom", "one side", "the other side", "left", "right", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not mean that the device or element must have a specific orientation, be constructed and operated in a specific orientation.

[0033] See attached Figure 1-2 The specific structure of an embodiment of a contact temperature monitoring and wear monitoring device for non-destructive installation of a brake pad proposed by the present invention is given. The device includes a housing 1, a temperature probe 2, an adjustment rod 3, a sliding assembly 4, a reset spring 5, a one-way gear bearing 6, a spring 7, an angle position encoder 8 and a reset knob 9.

[0034] The one-way gear bearing 6 is arranged inside the front end of the housing 1, the inner ring of which is a one-way bearing and the outer ring is an external gear, which can only rotate in the direction of the brake pad wear and is locked when rotating in the opposite direction;

[0035] The angle position encoder 8 is arranged on the outside of the front end of the shell 1, and its inner ring and outer ring can rotate relative to each other and then measure their relative rotation angle; the inner ring of the angle position encoder 8 is key-pin connected to the inner ring of the one-way gear bearing 6, and can produce axial displacement in the axial direction but does not produce relative rotation, and the outer ring is coaxially fixedly connected to the outer ring of the one-way gear bearing 6 through four pins, which can realize coaxial rotation and produce relative displacement in the axial direction.

[0036] The springs 7 are respectively installed on four pins, and their two ends are respectively abutted on the outer ring of the one-way gear bearing 6 and the outer ring of the angle position encoder 8, and are in a compressed state when working; the sliding component 4 is correspondingly arranged on the rear side of the one-way gear bearing 6 and meshed with its outer ring gear, and the sliding component 4 and the front end of the shell 1 are clearance-matched along the wear direction of the brake pad; a reset spring 5 is arranged between the sliding component 4 and the inner wall of the front end of the shell 1 along the direction perpendicular to the brake disc 10, and is in a compressed state when working; the temperature probe 2 is connected to the rear side of the sliding component 4 through the adjusting rod 3; one end of the reset knob 9 passes through the front end of the shell and is coaxially connected to the rear side of the one-way gear bearing 6.

[0037] like Figure 3 As shown, the main body of the sliding component 4 is a sliding block, and a groove structure is opened inside the sliding block, and a slide groove is opened in the middle along the wear direction of the brake pad, and the slide groove corresponds to the front end of the shell 1 through the clearance fit; the outer edge of the sliding block corresponding to the one-way gear bearing 6 is provided with a rack meshing with the outer ring gear of the one-way gear bearing 6; a contact ball 41 is installed on the surface of the side corresponding to the sliding block and the brake disc 11, and there is a clearance fit between the contact ball and the surface of the sliding block, and the movement of the contact ball 41 when it contacts the brake disc 11 is mainly rolling motion.

[0038] In this embodiment, a probe harness 21 is provided at one end of the temperature probe 2, the temperature probe 2 is in direct contact with the brake pad 10, and a gap of 0.8-1.2 mm is retained at the nearest point to the brake disc 11; the temperature probe 2 is preferably a thermocouple, which is externally connected to a data processing device through the probe harness 21.

[0039] An encoder harness 81 is disposed at the outer end of the angle position encoder 8; the encoder harness 81 is externally connected to a data processing device.

[0040] The reset knob 9 is threadedly connected to the front end of the housing 1. When the reset knob 9 is rotated in one direction, the one-way gear bearing 6 can move toward the rear side of the housing 1 under the action of the spring 7, so that the outer ring gear of the one-way gear bearing 6 loses engagement with the rack of the sliding component 4; when the reset knob 9 is rotated in the other direction, the one-way gear bearing 6 can compress the spring 7 again and restore its outer ring gear to re-engage with the rack of the sliding component 4.

[0041] When in use, the housing 1 and the brake pad 10 are mounted on the same mounting base. Figure 4As shown: when the vehicle brakes, the contact ball 41 first contacts the brake disc 11; the adjusting rod 3 is adjusted to make the temperature probe 2 directly contact the brake pad 10, and a certain gap is reserved between the temperature probe 2 and the brake pad 10 to prevent damage to the probe 2. At the same time, a certain gap is reserved between the temperature probe 2 and the brake disc 11 to prevent damage to the probe 2; the temperature probe 2 collects the temperature of the brake pad 10 and is connected to the data processing device through the probe harness 21; the angle position encoder 8 collects the outer ring gear angle of the one-way gear bearing 6, and transmits the collected angle back to the data processing device through the encoder harness 81, and the data processing device records the initial angle at this time.

[0042] When the train brakes, Figure 6 As shown, the contact ball 41 first contacts the brake disc 11 and rolls. As the brake pad 10 wears, the contact ball 41 pushes the sliding component 4 to move toward the inside of the housing 1, thereby driving the temperature probe 2 to move synchronously, ensuring that a certain gap is always maintained between it and the brake disc 11 without damaging the temperature probe 2; the rack of the sliding component 4 drives the one-way gear bearing 6 to rotate; the difference between the angle read by the angle position encoder 8 and the initial angle is converted into radians (rad) and multiplied by the pitch circle radius of the outer ring gear of the one-way gear bearing 6 to obtain the wear depth value of the brake pad. This data is processed by a data processing device and is used to prompt functions such as wear limit or automatic alarm.

[0043] When the train is relieved, such as Figure 7 As shown, due to the action of the one-way gear bearing 6, the sliding assembly 4 will maintain its original position and not move. At this time, the contact ball 41 is separated from the brake disc 11, thereby extending the service life of the contact ball 41.

[0044] When the brake pad 10 is worn to a limit, Figure 8 As shown, by rotating the reset knob 9 along the outer side of the housing 1, the one-way gear bearing 6 moves under the pressure of the spring 7, and the outer ring gear of the one-way gear bearing 6 and the rack of the sliding component 4 lose meshing. At this time, the reset spring 5 pushes the sliding component 4 out of the housing 1 for a certain displacement until its rack contacts the housing 1 and stops after being limited. By rotating the reset knob 9 along the inner side of the housing 1, the outer ring gear of the one-way gear bearing 6 and the rack of the sliding component 4 can be driven to re-engage. In this way, the device can be repeatedly installed and used.

[0045] The combined force of the friction resistance of the housing 1 on the sliding component 4 and the compressive elastic force of the return spring 5 is smaller than the thrust of the brake disc 11 on the contact ball 41, but is greater than the force exerted on the sliding component 4 along the wear direction of the brake pad 10 due to vibration or sand and gravel.

[0046] The compression force of the return spring 5 is greater than the friction resistance of the housing 1 on the sliding assembly 4 and does not affect the return of the sliding assembly 4 .

[0047] The maximum displacement of the sliding component 4 relative to the interior of the housing 1 is greater than the sum of the wear limit thickness of the gate plate 10 and the maximum wear of the contact ball 41 .

[0048] Matters not covered in the present invention are all known technologies.

[0049] The embodiments described above are merely descriptions of preferred implementation modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A contact temperature monitoring and wear monitoring device for non-destructive installation of a brake pad, characterized in that: The device includes a shell, a temperature probe, an adjusting rod, a sliding assembly, a reset spring, a one-way gear bearing, a spring, an angle position encoder and a reset knob; the one-way gear bearing is arranged inside the front end of the shell; the angle position encoder is arranged outside the front end of the shell, and its inner ring is correspondingly connected with the inner ring key pin of the one-way gear bearing, and the outer ring is correspondingly fixedly connected with the outer ring of the one-way gear bearing through a pin shaft; the spring is correspondingly installed on the pin shaft, and its two ends respectively abut the outer ring of the one-way gear bearing and the outer ring of the angle position encoder; the sliding assembly is correspondingly arranged on the rear side of the one-way gear bearing and meshed with its outer ring gear, and the sliding assembly and the shell are clearance-matched along the wear direction of the brake pad; a reset spring is arranged between the sliding assembly and the shell in a direction perpendicular to the brake disc; the temperature probe is connected to the rear side of the sliding assembly through the adjusting rod; one end of the reset knob passes through the shell and is correspondingly connected to the rear side of the one-way gear bearing.

2. A contact temperature monitoring and wear monitoring device for non-destructive installation of a brake pad according to claim 1, characterized in that: The sliding assembly includes a sliding block and a contact ball; a groove structure is opened inside the sliding block, and a slide groove is opened in the middle along the wear direction of the brake pad, and the slide groove corresponds to the clearance of the housing; the outer edge of the sliding block corresponding to the one-way gear bearing is provided with a rack meshing with the outer ring gear of the one-way gear bearing; a contact ball is installed on the surface of the sliding block corresponding to the brake disc.

3. A contact temperature monitoring and wear monitoring device for non-destructive installation of brake pads according to claim 2, characterized in that: There is a clearance fit between the contact ball and the sliding block.

4. The contact temperature monitoring and wear monitoring device for non-destructive installation of brake pads according to claim 1, characterized in that: A probe harness is arranged at one end of the temperature probe.

5. A contact-type temperature monitoring and wear monitoring device for non-destructive installation of a brake pad according to claim 4, characterized in that: The temperature probe is in direct contact with the brake pad and has a gap of 0.8-1.2 mm from the closest point of the brake disc.

6. A contact-type temperature monitoring and wear monitoring device for non-destructive installation of a brake pad according to claim 5, characterized in that: The temperature probe is preferably a thermocouple, which is externally connected to a data processing device via a probe harness.

7. The contact temperature monitoring and wear monitoring device for non-destructive installation of brake pads according to claim 1, characterized in that: An encoder harness is disposed at the outer end of the angle position encoder; the encoder harness is externally connected to a data processing device.

8. The contact temperature monitoring and wear monitoring device for non-destructive installation of brake pads according to claim 1, characterized in that: The inner ring of the one-way gear bearing is a one-way bearing, and the outer ring is an external gear, which can only rotate along the wear direction of the brake pad and is locked when rotating in the opposite direction.

9. The contact temperature monitoring and wear monitoring device for non-destructive installation of brake pads according to claim 1, characterized in that: The inner ring of the one-way gear bearing is connected to the inner ring of the angle position encoder by a key pin, which can only produce relative displacement in the axial direction but not relative rotation; the outer ring of the one-way gear bearing is coaxially fixedly connected to the outer ring of the angle position encoder by a plurality of pins, which can realize coaxial rotation and axial relative displacement.

10. The contact temperature monitoring and wear monitoring device for non-destructive installation of brake pads according to claim 1, characterized in that: The reset knob is threadedly connected to the housing. When the reset knob is rotated in one direction, the one-way gear bearing can be moved toward the rear side of the housing under the action of the spring, so that the outer gear of the one-way gear bearing loses meshing with the rack of the sliding assembly. When the reset knob is rotated in the other direction, the one-way gear bearing can compress the spring and then restore its external gear to re-engage with the rack of the sliding component.

11. A contact-type temperature monitoring and wear monitoring device for non-destructive installation of brake pads according to claim 2, characterized in that: The combined force of the friction resistance of the housing on the sliding assembly and the compression elastic force of the return spring is smaller than the thrust of the brake disc on the contact ball, but larger than the force on the sliding assembly caused by vibration or sand and gravel along the wear direction of the brake pad.

12. A contact-type temperature monitoring and wear monitoring device for non-destructive installation of brake pads according to claim 2, characterized in that: The compressive elastic force of the return spring is greater than the friction resistance generated by the housing on the sliding assembly.

13. A contact temperature monitoring and wear monitoring device for non-destructive installation of a brake pad according to claim 2, characterized in that: The maximum displacement of the sliding component relative to the interior of the housing is greater than the sum of the wear limit thickness of the brake pad and the maximum wear of the contact ball.

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