Integrated brake pad device with wear limiting function for vehicle braking

Abstract

The invention discloses an integrated brake pad device with an abrasion limiting function for vehicle braking, and belongs to the technical field of braking, the integrated brake pad device comprises a brake pad, the brake pad is arranged in an arc sheet shape, and an abrasion limiting alarm component is embedded in the brake pad in an integrated powder die-casting forming mode. One end face of the abrasion limiting and alarming component is flush with the end face where the section of the brake pad is located, the abrasion limiting and alarming component comprises an insulating positioning block and a hexagonal conductive block, the hexagonal conductive block is integrally embedded in the insulating positioning block, and after the insulating positioning block and the hexagonal conductive block are integrally embedded and formed, the hexagonal conductive block is fixedly connected with the insulating positioning block. And the brake pad is manufactured through a powder die-casting forming process. The hexagonal conductive block, the insulating positioning block and the brake pad form an integrated structure, the overall quality and the safety coefficient of the brake pad are improved and effectively improved, new and old brake pads can be directly replaced, and the real-time condition of the thickness of the brake pad can be accurately monitored.

Description

Technical Field

[0001] The invention belongs to the technical field of vehicle braking, and relates to an integrated brake pad device with wear limiter for vehicle braking. Background Art

[0002] According to statistics, 90% of the major and serious accidents in the country come from transportation. Man-made accidents in transportation come from "fatigue driving and speeding", and vehicle accidents come from "brake failure and tire blowout". How to solve "brake failure" has become a government control issue and a pain point in the industry. Disc brakes are mostly used for cars, and drum brakes are mostly used for operating tractors, trailers and other load-bearing vehicles and engineering vehicles. In related brake system technologies, the amount of wear on brake pads is an important indicator for measuring their performance and life. Common defects include uneven wear, thermal decay, and wear alarm failure. Due to the serious wear and continuous high temperature of large-tonnage brake pad components, the brake pad components are closely fitted with the brake disc or brake drum to form a high temperature state, which is the main reason for the decline in brake performance. Brake pads will wear during normal use. When they are worn to the limit, they must be replaced, otherwise the braking effect will be reduced and even cause safety accidents.

[0003] In traditional braking structures, holes are dug on the brake pads and sensors, electronic warning blocks and other electrical components are installed. However, the high heat energy caused by the braking process is transmitted to the entire brake drum, especially the sensors and electronic components closest to the brake pads. Not only is the brake pad assembly structure with multiple electronic components complicated and cumbersome, but it also affects the accuracy of the sensor in reflecting the actual wear. As a result, the wear monitoring system fails to accurately monitor the wear of the brake pads, resulting in the inability to provide timely reminders and replacements, increasing the safety risks of the vehicle.

[0004] Furthermore, traditional brake pads and brake shoes are fixed by screws. If the brake pads are not replaced in time after the brakes are worn to the screw heads, the entire brake drum may be scrapped, causing great losses. Even vehicle bumps may cause individual screws to loosen and fly out during driving, posing a great traffic hazard.

[0005] Therefore, an advanced brake pad structure technology that integrates the wear line limiter with the brake pad die-casting is proposed to adapt to the potential braking problem of the brake drum of new energy intelligent control vehicles. Summary of the invention

[0006] The present invention provides an integrated brake pad device with wear limiter for vehicle braking, aiming to solve the problems that the traditional brake pad structure assembled from multiple electronic components is complicated and cumbersome, the traditionally set sensors fail to accurately monitor the wear of the brake pad after being affected, resulting in failure to promptly remind replacement, and the brake pad fastened with screws damages the brake drum, increasing the safety risk factor of the vehicle.

[0007] To achieve the above-mentioned purpose, the present invention provides an integrated brake pad device with wear limit for vehicle braking, comprising a brake drum and a brake pad connected to the outer side of the brake drum, the brake pad is arranged in an arc-shaped sheet shape, and a wear limit alarm component is embedded in the brake pad by integrated powder die-casting, and one end face of the wear limit alarm component is flush with the end face where the cross section of the brake pad is located, the wear limit alarm component comprises an insulating positioning block and a hexagonal conductive block, a hexagonal conductive block is integrally embedded in the insulating positioning block, one end face of the hexagonal conductive block extends outward to expose the side face of the insulating positioning block, and is flush with the end face where the cross section of the brake pad is located, a plug hole is provided at the center of the hexagonal conductive block, at least two positioning holes are provided on one side of the insulating positioning block, the end face of the hexagonal conductive block away from the positioning hole is the wear alarm limit face of the brake pad, the positioning hole is flush with the end face where the arc inner side of the brake pad is located, and after the insulating positioning block and the hexagonal conductive block are integrally embedded and formed, they are made by a powder die-casting process based on the positioning hole and the brake pad.

[0008] Preferably, the position of the wear alarm limit surface of the hexagonal conductive block is at least 1 / 5 of the thickness of the brake pad.

[0009] Preferably, an annular groove is provided in the middle of the hexagonal conductive block so that the hexagonal conductive block and the insulating positioning block can be tightly embedded and fixed.

[0010] Preferably, the brake drum comprises a brake shoe bent plate, a brake shoe arc-shaped web, a retaining frame, and a supporting pin. The inner side surface of the brake pad is provided with a brake shoe bent plate, and the inner side surface of the brake shoe bent plate is welded and fixed with brake shoe arc-shaped webs arranged in pairs, and retaining frames are fixedly connected internally on both sides of the two brake shoe arc-shaped webs, and an axial hole is provided at the lower part of the retaining frame, and supporting pins are provided at the ends of both sides of the brake shoe arc-shaped web, and the supporting pins pass through the axial holes.

[0011] Preferably, the brake pad is provided with a plurality of countersunk holes, the brake shoe bent plate is provided with a plurality of assembly holes corresponding to the countersunk holes for riveting, the brake pad and the brake shoe bent plate are fixedly connected by rivets, and the top surface of the rivet located in the countersunk hole is lower than the wear alarm limit surface.

[0012] Preferably, a movable spring fixing pin is provided above each retaining frame, and two ends of the spring fixing pin are inserted and set on two side surfaces of the two brake shoe arc-shaped webs.

[0013] Preferably, the number of the brake shoe bent plates is 2, and the 2 brake shoe bent plates are symmetrically arranged inwardly, and each of the brake shoe bent plates is correspondingly arranged with the brake shoe arc web, retaining frame, supporting pin shaft and spring fixing pin to form a symmetrical arrangement.

[0014] Preferably, a tension spring is connected between the spring fixing pins on the same side of the two symmetrical brake shoe arc-shaped webs to form an inward pulling force; a return spring is connected between the spring fixing pins on the other side of the two symmetrical brake shoe arc-shaped webs to cause the brake pad to stretch outwards and rub, and an adjusting screw with adjustable elasticity is connected in series in the middle of the return spring.

[0015] Preferably, the number of the brake pads is 4.

[0016] Preferably, one end of the brake pad is thicker than the other end, and the thicker end of the brake pad is located on one side of the wear limit alarm component.

[0017] The beneficial effects of the present invention compared to the prior art are as follows:

[0018] The present invention provides an integrated brake pad device with wear limit for vehicle braking. The wear limit alarm component is pre-embedded before the brake pad powder is die-cast, so that the hexagonal conductive block, the insulating positioning block and the brake pad form an integrated overall structure, avoiding the risk of inaccurate brake wear monitoring caused by the traditional brake pad with multiple built-in electronic components. The overall quality and safety factor of the brake pad are indeed improved and effectively enhanced, and it has a wider application and significance for the brake monitoring of the growing new energy intelligent driving control.

[0019] The present invention provides an integrated brake pad device with wear limit for vehicle braking, which utilizes the integrated embedding of a hexagonal conductive block and an insulating positioning block to form a wear limit alarm component, so that the hexagonal conductive block is securely fixed without loosening, and then the position of the wear limit alarm component relative to the thickness of the brake pad is planned through a positioning hole, and powder die-casting is integrated to form a whole. The specifications and dimensions of the entire brake pad are still the same as those of traditional brake pads, and the brake pads can be directly replaced for both new and old vehicles, ensuring the compatibility of brake pad replacement.

[0020] In order to more clearly illustrate the structural features and effects of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of the brake pad of the present invention;

[0022] Figure 2 It is a schematic diagram of the exploded structure of the brake pad of the present invention;

[0023] Figure 3 It is a schematic diagram of the side structure of the brake pad of the present invention;

[0024] Figure 4 It is a schematic diagram of the exploded structure of the damage limit alarm component of the present invention;

[0025] Figure 5 It is a schematic diagram of the top view structure of the wear alarm limit surface of the hexagonal conductive block in the present invention;

[0026] Figure 6 It is a three-dimensional structural schematic diagram of the brake shoe curved plate and the brake pad in the present invention;

[0027] Figure 7 for Figure 6 A side view structural schematic diagram of;

[0028] Figure 8 It is a schematic diagram of the three-dimensional structure of the brake shoe arc-shaped web, brake shoe curved plate and brake pad in the present invention;

[0029] Fig. 9 It is a schematic diagram of the three-dimensional structure of the present invention;

[0030] Fig.10 for Fig. 9 Schematic diagram of the main structure;

[0031] Fig.11 for Fig.10 Schematic diagram of the C amplification structure.

[0032] Reference numerals:

[0033] 1. Brake pad; 2. Wear limit alarm component; 3. Insulating positioning block; 4. Hexagonal conductive block; 5. Plug hole; 6. Positioning hole; 7. Wear alarm limit surface; 8. Annular groove; 9. Brake shoe bent plate; 10. Brake shoe arc-shaped belly plate; 11. Cage; 12. Support pin shaft; 13. Countersunk hole; 14. Assembly hole; 15. Rivet; 16. Spring fixing pin; 17. Tension spring; 18. Return spring; 19. Adjusting screw. DETAILED DESCRIPTION

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by technicians in the technical field of this application; the terms used in the specification of the application herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, not to describe a specific order.

[0035] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0036] In order to solve the above problems, an embodiment of the present invention provides an integrated brake pad device with wear limiter for vehicle braking, referring to Figure 1-5 As shown, it includes a brake drum and a brake pad 1 connected to the outside of the brake drum, the brake pad 1 is an arc-shaped sheet, and a wear limit alarm component 2 is embedded in the brake pad 1 by integrated powder die-casting, and one end face of the wear limit alarm component 2 is flush with the end face of the cross section of the brake pad 1, and the wear limit alarm component 2 includes an insulating positioning block 3 and a hexagonal conductive block 4, the insulating positioning block 3 is integrally embedded with a hexagonal conductive block 4, and one end face of the hexagonal conductive block 4 extends outward to expose the insulating positioning block The side of the block 3 is flush with the end face where the cross section of the brake pad 1 is located. The center of the hexagonal conductive block 4 is provided with a plug hole 5. One side of the insulating positioning block 3 is provided with at least two positioning holes 6. The end face of the hexagonal conductive block 4 away from the positioning hole 6 is the wear alarm limit surface 7 of the brake pad 1. The positioning hole 6 is flush with the end face where the arc-shaped inner side of the brake pad 1 is located. After the insulating positioning block 3 and the hexagonal conductive block 4 are integrally embedded and formed, they are made through a powder die-casting process based on the positioning hole 6 and the brake pad 1.

[0037] Traditionally, brake pad wear is detected by connecting a wear head with a wire to the system. The front end of the system sensor probe is in the same plane as the brake pad. When the brake is applied, the probe and brake pad rub against the brake disc or drum simultaneously. When the head of the wear head with a wire is worn off, it is judged that the wear is complete and an alarm is generated. Among them, the wear head material of the brake pad is a highly polluting material with no recycling value. The installation cost of the wear head with a wire is high, and there are risks in the installation and fixing method. The sensor monitoring of the probe will become inaccurate due to high temperature, and the wear alarm has low accuracy and high cost.

[0038] The present embodiment adopts a copper hexagonal conductive block 4 with conductive properties, and first integrally wraps the hexagonal conductive block 4 through an insulating positioning block 3 to form a single wear limit alarm component 2, and then puts it into the mold lining of the brake pad 1, and is melted into the mold lining powder through high temperature and high pressure to form an integrally formed brake pad 1 with a wear limit alarm component 2. When the wear limit alarm component 2 of the brake pad 1 is die-cast, one end of the hexagonal conductive block 4 is exposed on the cross section of the brake pad 1, so that the plug hole 5 of the hexagonal conductive block 4 can be used as a lead-out interface, which is used to connect to the system port to form an intelligent and accurate judgment, which is different from the traditional brake pad 1 structure with multiple components with sensors or electronic components, wherein a positioning groove for the wear limit alarm component 2 is provided in the mold lining to set the distance of the wear limit alarm component 2 relative to the thickness of the brake pad 1, so as to timely and accurately obtain the wear limit of the thickness of the brake pad 1 and trigger the alarm.

[0039] The structure of the brake pad 1 does not change the traditional installation and use of the brake pad 1, avoids the cost of the traditional wear harness head, has no material pollution, no installation cost, and is user-friendly and intelligent. Its use is as follows: the plug hole 5 is connected to the high-temperature resistant plug pin as the lead-out interface, that is, the wear status signal of the brake pad 1 is connected to the extension, and the extension is sampled and processed and sent to the central controller through wireless (RF) or serial port. The central controller receives the signals of each extension and performs identification and processing, and then sends the signal to the receiving host in the cab through a wired method, and the wear status, positioning status, quantitative status and qualitative status of the brake pad 1 are displayed on the in-vehicle instrument or display screen for the driver to judge the vehicle condition. The data status can also be transmitted to a third-party monitoring platform through the device in the form of a serial port to ensure the safety of the driver, the vehicle and the object.

[0040] Furthermore, the position of the wear alarm limit surface 7 of the hexagonal conductive block 4 is at least 1 / 5 of the thickness of the brake pad 1. For example, the wear alarm limit surface 7 can be set at a position of 1 / 5, 1 / 4 or 1 / 3 of the thickness of the brake pad 1.

[0041] Furthermore, an annular groove 8 is provided in the middle of the hexagonal conductive block 4 so that the hexagonal conductive block 4 and the insulating positioning block 3 are tightly embedded and fixed, thereby increasing the embedding surface area and adhesion.

[0042] For further reference, Figure 6-11As shown, the inner side surface of the brake pad 1 is provided with a brake shoe bent plate 9, and the inner side surface of the brake shoe bent plate 9 is welded and fixed with brake shoe arc-shaped webs 10 arranged in pairs, and retaining frames 11 are fixedly connected inside the two sides of the two brake shoe arc-shaped webs 10, and an axial hole is provided at the lower part of the retaining frame 11, and supporting pins 12 are provided at the ends of both sides of the brake shoe arc-shaped webs 10, and the supporting pins 12 pass through the axial holes.

[0043] Specifically, the brake pad 1 is provided with a plurality of countersunk holes 13, and the brake shoe bent plate 9 is provided with a plurality of assembly holes 14 for riveting corresponding to the countersunk holes 13. A rivet 15 is provided between the brake pad 1 and the brake shoe bent plate 9 for fixed connection, and the top surface of the rivet 15 located in the countersunk hole 13 is lower than the wear alarm limit surface 7. In this way, during the friction process of the outer side of the brake pad 1, the countersunk hole 13 is not only used for riveting, but also can increase the friction resistance of the brake pad 1 to a certain extent compared with the serration formation set on the surface of the traditional brake pad 1.

[0044] Furthermore, a movable spring fixing pin 16 is provided above each of the retaining frames 11, and the two ends of the spring fixing pin 16 are inserted and set on the two side surfaces of the two brake shoe arcuate webs 10. Among them, the number of the brake shoe curved plates 9 is 2, and the two brake shoe curved plates 9 are symmetrically arranged inwardly, and each of the brake shoe curved plates 9 is correspondingly arranged with the brake shoe arcuate web 10, the retaining frame 11, the support pin shaft 12 and the spring fixing pin 16 to form a symmetrical arrangement.

[0045] In this embodiment, the brake drum of the vehicle is concave and circular, and the brake pad 1 riveted on the brake shoe curved plate 9 can perform friction braking on the inner wall of the brake drum by utilizing the reset activity of the symmetrical brake shoe curved plate 9 and the brake shoe arc-shaped web 10. Two brake pads 1 are arranged on each brake shoe curved plate 9, and the number of brake pads 1 is 4, so as to be opened and pressed against the brake drum for friction. Among them, the thickness of one end of the brake pad 1 is thicker than that of the other end, and the thick end of the brake pad 1 is located on one side of the wear limit alarm component 2.

[0046] Furthermore, a tension spring 17 is connected between the spring fixing pins 16 on the same side of the two symmetrical brake shoe arcuate webs 10 to form an inward pulling force; a return spring 18 is connected between the spring fixing pins 16 on the other side of the two symmetrical brake shoe arcuate webs 10 to make the brake pad 1 stretch outwards by friction, and an adjusting screw 19 with adjustable elasticity is serially connected in the middle of the return spring 18. Among them, the brake pump is connected to drive the brake shoe arcuate web 10, the brake shoe curved plate 9 and the brake pad 1 to open outward synchronously, so that the brake pad 1 acts on the inner wall of the brake drum to achieve the purpose of braking; in the process of the brake pump recovery, the return spring 18 drives the two symmetrical brake shoe curved plates 9 to shrink to the original position state, so as to prepare for the next brake.

[0047] In summary, the present invention provides an integrated brake pad device with wear limit for vehicle braking. The wear limit alarm component 2 is pre-embedded before the brake pad 1 is powder die-casted, so that the hexagonal conductive block 4, the insulating positioning block 3, and the brake pad 1 form an integrated overall structure, avoiding the risk of inaccurate monitoring of brake wear caused by the traditional brake pad 1 with multiple built-in electronic components, and effectively improving and effectively enhancing the overall quality and safety factor of the brake pad 1. It has a relatively wide application and significance for the brake monitoring of the growing new energy intelligent driving control. The wear limit alarm component 2 is formed by the integrated embedding of the hexagonal conductive block 4 and the insulating positioning block 3, so that the hexagonal conductive block 4 is securely fixed without loosening, and then the position of the wear limit alarm component 2 relative to the thickness of the brake pad 1 is planned through the positioning hole 6, and the powder die-casting is integrated to form a whole. The specifications and dimensions of the entire brake pad 1 are still the same as those of the traditional brake pad 1. Both new and old vehicles can directly replace the brake pad 1, ensuring the compatibility of the replacement of the brake pad 1.

[0048] The technical principle of the present invention is described above in combination with the specific embodiments, which are only preferred implementations of the present invention. The protection scope of the present invention is not limited to the above embodiments, and all technical solutions under the idea of ​​the present invention belong to the protection scope of the present invention. Those skilled in the art can think of other specific implementations of the present invention without creative work, and these methods will fall within the protection scope of the present invention.

Claims

1. An integrated brake pad device with wear limiter for vehicle braking, characterized in that: The invention comprises a brake drum and a brake pad connected to the outer side of the brake drum, the brake pad being arranged in an arc-shaped sheet shape, the brake pad being integrated with a wear limit alarm component by powder die-casting, and one end face of the wear limit alarm component is flush with the end face where the cross section of the brake pad is located, the wear limit alarm component comprises an insulating positioning block and a hexagonal conductive block, the insulating positioning block being integrally embedded with a hexagonal conductive block, one end face of the hexagonal conductive block extending outwardly to expose the side face of the insulating positioning block, and being flush with the end face where the cross section of the brake pad is located, a plug hole is provided at the center of the hexagonal conductive block, at least two positioning holes are provided on one side of the insulating positioning block, the end face where the side of the hexagonal conductive block away from the positioning hole is located is the wear alarm limit face of the brake pad, the positioning hole is flush with the end face where the arc-shaped inner side of the brake pad is located, and after the insulating positioning block and the hexagonal conductive block are integrally embedded and formed, they are made by a powder die-casting process based on the positioning hole and the brake pad.

2. The integrated brake pad device with wear limiter for vehicle braking according to claim 1, characterized in that: The position of the wear alarm limit surface of the hexagonal conductive block is at least 1 / 5 of the thickness of the brake pad.

3. The integrated brake pad device with wear limiter for vehicle braking according to claim 1, characterized in that: An annular groove is provided in the middle of the hexagonal conductive block so that the hexagonal conductive block and the insulating positioning block are tightly embedded and fixed.

4. The integrated brake pad device with wear limiter for vehicle braking according to claim 1, characterized in that: The brake drum includes a brake shoe bent plate, a brake shoe arc-shaped web, a retaining frame, and a supporting pin shaft. The inner side surface of the brake pad is provided with a brake shoe bent plate, and the inner side surface of the brake shoe bent plate is welded and fixed with brake shoe arc-shaped webs arranged in pairs. The two sides of the two brake shoe arc-shaped webs are internally fixedly connected with retaining frames, and the lower part of the retaining frame is provided with an axial hole. Support pin shafts are provided at the ends of both sides of the brake shoe arc-shaped web, and the support pin shafts pass through the axial holes.

5. The integrated brake pad device with wear limiter for vehicle braking according to claim 4, characterized in that: The brake pad is provided with a plurality of countersunk holes, the brake shoe bent plate is provided with a plurality of assembly holes for riveting corresponding to the countersunk holes, the brake pad and the brake shoe bent plate are fixedly connected by rivets, and the top surface of the rivet located in the countersunk hole is lower than the wear alarm limit surface.

6. The integrated brake pad device with wear limiter for vehicle braking according to claim 5, characterized in that: A movable spring fixing pin is arranged above each retaining frame, and two ends of the spring fixing pin are inserted and set on two side surfaces of the two brake shoe arc-shaped webs.

7. The integrated brake pad device with wear limiter for vehicle braking according to claim 6, characterized in that: The number of the brake shoe bent plates is 2, and the two brake shoe bent plates are symmetrically arranged inwardly, and each of the brake shoe bent plates is correspondingly arranged with the brake shoe arc web, retaining frame, supporting pin shaft and spring fixing pin to form a symmetrical arrangement.

8. The integrated brake pad device with wear limiter for vehicle braking according to claim 7, characterized in that: A tension spring is connected between the spring fixing pins on the same side of the two symmetrical brake shoe arc-shaped webs to form an inward pulling force; a return spring is connected between the spring fixing pins on the other side of the two symmetrical brake shoe arc-shaped webs to cause the brake pad to stretch outward for friction, and an adjusting screw with adjustable elasticity is connected in series in the middle of the return spring.

9. The integrated brake pad device with wear limiter for vehicle braking according to claim 1, characterized in that: The number of the brake pads is 4.

10. The integrated brake pad device with wear limiter for vehicle braking according to claim 1, characterized in that: One end of the brake pad is thicker than the other end, and the thicker end of the brake pad is located at one side of the wear limit alarm component.

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