Wear-resistant automobile accessory brake pad

Abstract

The utility model relates to a wear-resistant automobile accessory brake pad which comprises an installation body, a hydraulic oil groove is formed in the installation body, an end cover is fixedly connected to the outer end of the installation body, a hydraulic oil pipe is fixedly connected to the outer end of the end cover and communicated with the hydraulic oil groove, and three oil holes are formed in the bottom of the hydraulic oil groove at equal intervals. Threshold valves are fixedly connected to the inner walls of the second oil hole and the third oil hole correspondingly, driving oil cavities are formed in the positions, corresponding to the three oil holes, of the bottom of the mounting body correspondingly, braking assemblies are slidably connected into the driving oil cavities and comprise driving rods, and steel back plates are fixedly connected to the outer ends of the driving rods. Excessive abrasion is avoided through a graded braking structure, abrasion monitoring is achieved through piezoelectric detection, a force transmission path is optimized by adopting a protective sleeve structure, a heat dissipation system is arranged to prevent overheating, the friction coefficient is improved, and the service life of the friction plate is prolonged. And the reliability, the wear resistance and the service life of the brake pad are improved.

Description

Technical Field

[0001] The utility model relates to a brake pad for wear-resistant automobile accessories, in particular to a brake pad for wear-resistant automobile accessories applied in the technical field. Background Art

[0002] At present, traditional brake pads are of an integral structure and cannot adjust the braking force according to different working conditions. This can easily cause excessive wear of the brake pads and reduce their wear resistance. Secondly, the replacement of brake pads mainly relies on visual inspection or mileage estimation, which cannot accurately judge the degree of wear and tear, and can easily cause safety hazards. The shear force and heat generated during braking can cause the brake pads to deform or be damaged, affecting the braking effect and service life.

[0003] The specification of Chinese utility model patent CN206668833U discloses that the utility model relates to a high-wear-resistant brake pad, including a steel back and a friction base plate. The front side of the steel back is provided with a first protrusion and a groove provided on the outer periphery of the first protrusion, the back side of the friction base plate is provided with an inner groove matching the first protrusion and a second protrusion matching the groove, a rubber pad is embedded between the steel back and the friction base plate, and the front side of the friction base plate is provided with a plurality of convex circles, which are staggered and grooves are formed between the convex circles, and the grooves are arranged at an angle.

[0004] The utility model has the advantages of simple and reasonable structure, high connection strength, convenient assembly, strong wear resistance, and good drainage and dirt removal effects.

[0005] Although the above design solves the heat dissipation and sewage discharge problems of the brake pads, it still has certain limitations. For example, it cannot adjust the braking force according to different braking requirements, and it cannot monitor the wear status of the brake pads in real time, which can easily cause excessive wear of the brake pads and safety hazards. Utility Model Content

[0006] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is to provide a wear-resistant automobile brake pad with graded braking and wear monitoring functions.

[0007] In order to solve the above problems, the utility model provides a wear-resistant automobile accessory brake pad, including a mounting body, a hydraulic oil tank is opened inside the mounting body, the outer end of the mounting body is fixedly connected to the end cover, the outer end of the end cover is fixedly connected to the hydraulic oil pipe, and the hydraulic oil pipe is connected to the hydraulic oil tank, the bottom of the hydraulic oil tank is provided with a first oil hole, a second oil hole, and a third oil hole at equal intervals, the inner wall of the second oil hole is fixedly connected to the first threshold valve, and the inner wall of the third oil hole is fixedly connected to the second threshold valve, the bottom of the mounting body is provided with a driving oil cavity corresponding to the first oil hole, the second oil hole and the third oil hole, the inner walls of the multiple driving oil cavities are all slidably connected to the brake assembly, and the brake assembly includes a driving rod slidably connected to the driving oil cavity.

[0008] As a further improvement of the present application, the outer end of the driving rod is fixedly connected to a steel back plate, the outer end of the steel back plate is fixedly connected to a piezoelectric ceramic layer, the piezoelectric ceramic layer is electrically connected to a signal processing system, the piezoelectric ceramic layer includes multiple piezoelectric units, and the multiple piezoelectric units are arranged in an array.

[0009] As a further improvement of the present application, the outer end of the piezoelectric ceramic layer is fixedly connected to a conductive layer, the conductive layer adopts silver paste conductive material, and the conductive circuit is arranged in a serpentine pattern.

[0010] As a further improvement of the present application, the outer end of the conductive layer is fixedly connected to an insulating layer, the insulating layer is made of alumina ceramic material, the outer end of the insulating layer is fixedly connected to a friction plate, and the friction plate and the insulating layer are connected using a high-temperature sintering process.

[0011] As another improvement of the present application, the outer end of the steel back plate is fixedly connected to a protective sleeve, the outer end of the piezoelectric ceramic layer is fixedly connected to the inner wall of the protective sleeve, and the outer end of the insulating layer is slidably connected to the inner wall of the protective sleeve.

[0012] As another improved supplement to the present application, a plurality of evenly distributed chip grooves are provided at the outer end of the friction plate, a plurality of evenly distributed heat dissipation holes are provided inside the steel back plate, and a plurality of mounting ears are fixedly connected to the outer end of the mounting body.

[0013] In summary, this solution has the following beneficial effects:

[0014] The three-stage braking structure can activate the corresponding number of brake components according to the braking demand, avoid unnecessary wear, and ensure a smooth transition of braking force through threshold valve control. The piezoelectric ceramic layer and conductive layer set on the steel back plate can realize real-time monitoring of brake pad wear, and can judge the degree of wear and identify eccentric wear through changes in piezoelectric signals, thus establishing an active prevention mechanism; through the special connection structure of the protective cover and the steel back plate, the piezoelectric ceramic layer and the insulating layer, the shear force is directly transmitted to the steel back plate, effectively protecting the detection system; and through the inclined chip grooves on the friction plate and the heat dissipation holes on the steel back plate, a chip removal and heat dissipation system is formed, which effectively prevents the brake pad from overheating and deformation. Therefore, through the designs of graded braking, real-time detection, structural protection and heat dissipation optimization, the reliability, wear resistance and service life of the brake pad are comprehensively improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall structure of this application;

[0016] Figure 2 This is the first exploded view of this application;

[0017] Figure 3 This is the second exploded view of this application;

[0018] Figure 4 A partial diagram of this application;

[0019] Figure 5 This is the left side view of the application;

[0020] Figure 6 For this application Figure 5 AA section view;

[0021] Figure 7 For this application Figure 5 BB cross-sectional view.

[0022] Description of the numbers in the figure:

[0023] 1. Mounting body; 2. Hydraulic oil tank; 3. End cover; 4. Hydraulic oil pipe; 5. First oil hole; 6. Second oil hole; 7. Third oil hole; 8. First threshold valve; 9. Second threshold valve; 10. Drive oil chamber; 11. Drive rod; 12. Steel back plate; 13. Piezoelectric ceramic layer; 14. Conductive layer; 15. Insulating layer; 16. Friction plate; 17. Protective cover; 18. Chip groove; 19. Heat dissipation hole; 20. Mounting ear. DETAILED DESCRIPTION

[0024] The following describes the implementation of the present application in detail with reference to the accompanying drawings.

[0025] Example: Figure 1-7 It is shown that a wear-resistant automobile accessory brake pad includes a mounting body 1, a hydraulic oil tank 2 is opened inside the mounting body 1, an end cover 3 is fixedly connected to the outer end of the mounting body 1, a hydraulic oil pipe 4 is fixedly connected to the outer end of the end cover 3, and the hydraulic oil pipe 4 is communicated with the hydraulic oil tank 2, and the hydraulic oil pipe 4 is connected to the main pump of the automobile, so as to facilitate the use of hydraulic oil to drive the brake assembly, and a first oil hole 5, a second oil hole 6, and a third oil hole 7 are opened at equal intervals at the bottom of the hydraulic oil tank 2, a first threshold valve 8 is fixedly connected to the inner wall of the second oil hole 6, and a second threshold valve 9 is fixedly connected to the inner wall of the third oil hole 7, wherein the starting pressure of the first threshold valve 8 is less than the starting pressure of the second threshold valve 9, so as to facilitate the realization of the segmented braking function.

[0026] A driving oil chamber 10 is provided at the bottom of the mounting body 1 at positions corresponding to the first oil hole 5, the second oil hole 6, and the third oil hole 7. The inner walls of the multiple driving oil chambers 10 are slidably connected with a brake assembly. The brake assembly includes a driving rod 11 slidably connected to the driving oil chamber 10. A return spring (not shown in the figure) is provided in each driving oil chamber 10, wherein the elastic coefficients of the return springs corresponding to the first oil hole 5, the second oil hole 6, and the third oil hole 7 are different, wherein the elastic coefficients of the return springs corresponding to the second oil hole 6 and the third oil hole 7 match the first threshold valve 8 and the second threshold valve 9.

[0027] The outer end of the driving rod 11 is fixedly connected to a steel back plate 12, and the outer end of the steel back plate 12 is fixedly connected to a piezoelectric ceramic layer 13, which is used to monitor the wear status of the brake pad. The piezoelectric ceramic layer 13 is electrically connected to a signal processing system, and the degree of wear is judged by analyzing the changes in the piezoelectric signal. The outer end of the piezoelectric ceramic layer 13 is fixedly connected to a conductive layer 14. The conductive layer 14 adopts silver paste conductive material, and its conductive circuit is arranged in a serpentine pattern, which can effectively increase the conductive area. The outer end of the conductive layer 14 is fixedly connected to an insulating layer 15, and the insulating layer 15 is made of alumina ceramic material. The outer end of the insulating layer 15 is fixedly connected to a friction plate 16. The friction plate 16 and the insulating layer 15 are connected by a high-temperature sintering process, and the bonding strength is not less than 30MPa.

[0028] The outer end of the steel back plate 12 is fixedly connected to a protective cover 17, the outer end of the piezoelectric ceramic layer 13 is fixedly connected to the inner wall of the protective cover 17, and the outer end of the insulating layer 15 is slidably connected to the inner wall of the protective cover 17. The shear force generated during braking is directly transmitted to the steel back plate 12 through the protective cover 17, effectively protecting the piezoelectric ceramic layer 13 and the conductive layer 14, optimizing the force transmission path, and improving the reliability and service life of the detection system. When braking, the friction force on the friction plate 16 will be converted into shear force and directly transmitted to the steel back plate 12 through the protective cover 17, avoiding the piezoelectric ceramic layer 13 and the conductive layer 14 from being subjected to shear stress.

[0029] The outer end of the friction plate 16 is provided with a plurality of evenly distributed chip grooves 18. The inclined chip grooves 18 can not only discharge the debris generated by braking in time, but also form a guided airflow to enhance the heat dissipation effect. The interior of the steel back plate 12 is provided with a plurality of evenly distributed heat dissipation holes 19. The heat dissipation holes 19 further enhance heat dissipation and effectively prevent the brake plate from overheating and deformation. The outer end of the mounting body 1 is fixedly connected with a plurality of mounting ears 20 for easy installation and fixation.

[0030] During operation, the driver steps on the brake pedal, the vehicle's main hydraulic pump starts working, and the hydraulic oil enters the hydraulic oil tank 2 through the hydraulic oil pipe 4. When the vehicle is traveling slowly and needs light braking, only the first set of brake components is braked, and the hydraulic oil in the hydraulic oil tank 2 enters the corresponding drive oil chamber 10 only through the first oil hole 5. The hydraulic oil pushes the drive rod 11, and the drive rod 11 pushes the steel back plate 12, further pushing the friction plate 16 to contact the brake disc for braking. In this light braking mode, since only one set of brake components is working, unnecessary wear can be effectively reduced; during moderate braking, the hydraulic pressure reaches the opening value of the first threshold valve 8. When the vehicle is in emergency, the pressure reaches the opening value of the second threshold valve 9, and the three brake assemblies brake the brake disc at the same time to provide maximum braking force. The design adopts a three-level braking structure, which can provide the most suitable braking force according to different working conditions and avoid excessive wear of the brake pads. At the same time, the graded braking method controlled by the threshold valve is adopted to avoid sudden changes in braking force and improve the smoothness of braking. The coordinated work of the three brake assemblies not only ensures the effect of emergency braking, but also can evenly disperse the braking pressure and extend the service life of the brake pads.

[0031] During wear detection, the piezoelectric ceramic layer 13 generates an electrical signal when it is subjected to pressure. The signal is transmitted to the signal processing system through the conductive layer 14. By analyzing the characteristic changes of the piezoelectric signal, the wear state of the friction plate 16 can be determined. Under normal conditions, the piezoelectric signal amplitude is stable and the waveform is regular. When there is slight wear, the signal amplitude decreases, and the system issues an early warning prompt; when there is moderate wear, the signal amplitude decreases, and the system recommends replacement; when there is severe wear, the signal amplitude decreases significantly, and the system issues a forced replacement warning. At the same time, the frequency characteristics and phase relationship of the piezoelectric signal can also reflect the uneven wear of the brake pad, helping to promptly detect abnormal conditions such as eccentric wear.

[0032] In view of current actual needs, the protection scope of the above-mentioned implementation mode adopted in this application is not limited to this. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the protection scope of this utility model.

Claims

1. A wear-resistant automobile brake pad, characterized by: The invention comprises a mounting body (1), wherein a hydraulic oil tank (2) is provided inside the mounting body (1), an end cover (3) is fixedly connected to the outer end of the mounting body (1), a hydraulic oil pipe (4) is fixedly connected to the outer end of the end cover (3), and the hydraulic oil pipe (4) is communicated with the hydraulic oil tank (2), a first oil hole (5), a second oil hole (6), and a third oil hole (7) are provided at the bottom of the hydraulic oil tank (2) at equal intervals, a first threshold value valve (8) is fixedly connected to the inner wall of the second oil hole (6), and a second threshold value valve (9) is fixedly connected to the inner wall of the third oil hole (7), and a driving oil chamber (10) is provided at the bottom of the mounting body (1) at positions corresponding to the first oil hole (5), the second oil hole (6), and the third oil hole (7), and the inner walls of the plurality of driving oil chambers (10) are all slidably connected to a brake assembly, and the brake assembly includes a driving rod (11) slidably connected to the driving oil chamber (10).

2. The wear-resistant automobile accessory brake pad according to claim 1, characterized in that: The outer end of the driving rod (11) is fixedly connected to a steel back plate (12), the outer end of the steel back plate (12) is fixedly connected to a piezoelectric ceramic layer (13), the piezoelectric ceramic layer (13) is electrically connected to a signal processing system, and the piezoelectric ceramic layer (13) includes a plurality of piezoelectric units, and the plurality of piezoelectric units are arranged in an array.

3. The wear-resistant automobile accessory brake pad according to claim 2, characterized in that: The outer end of the piezoelectric ceramic layer (13) is fixedly connected to a conductive layer (14), the conductive layer (14) adopts a silver paste conductive material, and the conductive circuit is arranged in a serpentine pattern.

4. The wear-resistant automobile accessory brake pad according to claim 3, characterized in that: The outer end of the conductive layer (14) is fixedly connected to an insulating layer (15), the insulating layer (15) is made of an alumina ceramic material, the outer end of the insulating layer (15) is fixedly connected to a friction plate (16), and the friction plate (16) and the insulating layer (15) are connected using a high-temperature sintering process.

5. The wear-resistant automobile accessory brake pad according to claim 4, characterized in that: The outer end of the steel back plate (12) is fixedly connected to a protective sleeve (17), the outer end of the piezoelectric ceramic layer (13) is fixedly connected to the inner wall of the protective sleeve (17), and the outer end of the insulating layer (15) is slidably connected to the inner wall of the protective sleeve (17).

6. The wear-resistant automobile accessory brake pad according to claim 4, characterized in that: The outer end of the friction plate (16) is provided with a plurality of evenly distributed chip removal grooves (18), the interior of the steel back plate (12) is provided with a plurality of evenly distributed heat dissipation holes (19), and the outer end of the mounting body (1) is fixedly connected with a plurality of mounting ears (20).

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