Disc brake pad capable of automatically detecting clearance

Abstract

The invention discloses a disc brake pad capable of automatically detecting a gap, and relates to the technical field of automobile braking, the disc brake pad comprises a mounting frame, a hydraulic braking system and two brake pad bodies, and the two brake pad bodies are oppositely mounted on the mounting frame in a sliding manner; the hydraulic braking system is used for controlling movement of the two brake pad bodies. And the two reciprocating lead screws are rotationally mounted on the mounting frame, and the two reciprocating lead screws are each provided with two moving blocks in a threaded mode. The brake pad thickness and flatness detection device has the advantages that the brake action can be used for storing energy for detection treatment, the thickness and flatness of the brake pad can be automatically detected after a specific number of times of braking is completed, the detection result is more accurate and more timely, problems can be conveniently found in time, the brake pad can be conveniently replaced, the driving safety is improved, and the service life of the brake pad is prolonged. And the priority of the braking action is higher than that of the detection action, so that the problem of brake failure caused by mutual conflict of the two actions can be avoided, and the safety is higher.

Description

Technical Field

[0001] The invention relates to the technical field of automobile braking, and in particular to a disc brake pad capable of automatically detecting clearance. Background Art

[0002] Disc brakes are a common type of modern automobile braking system. When the driver steps on the brake pedal, the brake fluid is pressed into the piston of the brake caliper, pushing the piston outward, thereby clamping the brake pad and the brake disc to complete the braking operation. As the brake pad is used, it will wear to a certain extent. In order to ensure the effectiveness of the brake pad, it is necessary to check it regularly. At present, it is generally checked manually with the naked eye, which not only cannot guarantee accuracy, but also makes it difficult to detect the wear and smoothness of the brake pad. In addition, the cycle of manual inspection is not fixed, and it is difficult to detect the hidden dangers of the brake pad in time. Therefore, it is necessary to design a disc brake pad with automatic gap detection. Summary of the invention

[0003] In view of the deficiencies in the prior art, the present invention provides a disc brake pad capable of automatic gap detection, which solves the problems raised in the above-mentioned background technology.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions: A disc brake pad capable of automatically detecting clearance comprises a mounting frame, a hydraulic brake system and two brake pad bodies, and also comprises: The two brake pad bodies are slidably mounted on the mounting frame toward each other, and the hydraulic brake system is used to control the movement of the two brake pad bodies; Two reciprocating screws, both of which are rotatably mounted on a mounting frame, and both of which are threadedly mounted with two moving blocks, and two detection rods are fixedly mounted at the lower end of each of the moving blocks, and each of the two detection rods is respectively matched with a corresponding brake pad body, and the detection rods are used to detect the thickness and surface flatness of the brake pad body; The driving part is used to store energy for the rotation of the reciprocating screw during the braking process, and quickly drive the detection rod to complete the detection and processing of the brake pad body after braking a certain number of times. The driving part includes a rotating rod rotatably mounted on a mounting frame, and the rotating rod is fixedly connected to one of the reciprocating screws. A pressurizing assembly that cooperates with the brake pad body is installed in the mounting frame, and an energy storage assembly that cooperates with the pressurizing assembly is also installed in the mounting frame, and a transmission assembly is installed between the energy storage assembly and the rotating rod.

[0005] Furthermore, two guide blocks are fixedly installed on the side walls of the brake pad body, and the mounting frame is provided with guide grooves matching the guide blocks. A side plate is fixedly installed on the side wall of one of the guide blocks, and a groove matching the side plate is provided on the side wall of the guide groove. A belt transmission structure is installed between the two reciprocating screws.

[0006] Furthermore, the pressurizing assembly consists of a pressure chamber, a first piston, a movable plate and a spring. The pressure chamber is fixedly installed in a mounting frame, the first piston is sealingly and slidably installed in the pressure chamber, the movable plate is fixedly connected to the first piston through a round rod, and a spring is installed between the movable plate and the pressure chamber.

[0007] Furthermore, the energy storage assembly consists of a driving chamber, a guide tube, a second piston and a push rod. The driving chamber is fixedly installed in the mounting frame at one end close to the rotating rod, the guide tube is fixedly connected to the driving chamber, the second piston is sealingly and slidably installed in the driving chamber, the push rod is fixedly installed on the side wall of the second piston, and the push rod is sealingly and slidably connected to the guide tube.

[0008] Furthermore, a one-way air guide pipe is fixedly connected between one end of the pressure chamber away from the movable plate and one end of the drive chamber away from the guide pipe, a one-way air inlet hole is opened at one end of the pressure chamber away from the movable plate, and an oil pipe is fixedly connected between one end of the drive chamber away from the one-way air guide pipe and the hydraulic brake system.

[0009] Furthermore, the transmission assembly consists of a drive shaft, a fixed gear, a fixed tooth plate, a transmission shaft, a torsion spring and a differential mechanism. The drive shaft and the transmission shaft are both rotatably mounted in a mounting frame, and the drive shaft and the transmission shaft are both coaxial with the rotating rod. The fixed gear is fixedly mounted on the drive shaft, the fixed tooth plate is fixedly mounted on the push rod, and the fixed tooth plate is meshed with the fixed gear, the torsion spring is mounted between the drive shaft and the transmission shaft, and the differential mechanism is mounted between the transmission shaft and the rotating rod.

[0010] Furthermore, the differential mechanism consists of a rotating shaft, a fixed gear ring, a transmission gear ring and a belt transmission structure 2. The rotating shaft is rotatably mounted in a mounting frame, the fixed gear ring is fixedly mounted on the side wall of the transmission shaft, the transmission gear ring is fixedly mounted on the rotating shaft, and the transmission gear ring is meshed with the fixed gear ring. The belt transmission structure 2 is installed between the rotating shaft and the rotating rod, and the diameter of the transmission gear ring is smaller than the diameter of the fixed gear ring.

[0011] Furthermore, the rotating rod is provided with a plug hole which is arranged to penetrate the rotating rod, and an L-shaped plug rod which is plugged and matched with the plug hole is fixedly mounted on the end of the pushing rod away from the second piston.

[0012] Compared with the prior art, the present invention has the following advantages: 1: Through the design of reciprocating screw and detection rod, the overall thickness and surface flatness of the brake pad can be detected, which can not only determine the service life of the brake pad, but also evaluate its braking performance. No manual inspection is required, which can effectively improve the detection accuracy, facilitate timely detection of problems and replacement, and ensure driving safety.

[0013] 2: Through the design of the drive unit, the braking action can be used to store energy for the drive of the reciprocating screw, and after braking a certain number of times, the reciprocating screw is automatically rotated to drive the detection rod to complete the detection of the brake pad. The detection process does not require the installation of additional power components and is automatically completed during driving, which reduces costs and is more timely.

[0014] 3: Through the coordination of the oil pipe, L-shaped rod and socket, it can be ensured that the detection action will not be carried out during the braking process, avoiding the conflict between the two. This not only ensures the smooth progress of the detection action, but also avoids the problem of brake failure caused by the conflict between braking and detection actions.

[0015] In summary, the present invention can utilize the braking action to store energy for detection processing, and automatically detect the thickness and flatness of the brake pad after completing a specific number of brakings. The detection results are more accurate and more timely, which is convenient for timely detection of problems and replacement of brake pads, thereby improving driving safety. In addition, the priority of the braking action is higher than the detection action, which can avoid the problem of brake failure caused by conflict between the two, and is safer. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic structural diagram of a disc brake pad capable of automatic gap detection proposed by the present invention; Figure 2 for Figure 1 A schematic diagram of the structure from another perspective; Figure 3 for Figure 2 Schematic diagram of the structure after removing the mounting frame; Figure 4 for Figure 3 Schematic diagram of the back structure; Figure 5 for Figure 4 Schematic diagram of the structure after removing the brake pad body; Figure 6 for Figure 3 An enlarged schematic diagram of the structure at the middle drive chamber; Figure 7 for Figure 6 Schematic diagram of structural decomposition from another perspective; Figure 8 for Figure 6 An enlarged schematic diagram of the structure at the transfer rod from another perspective; Fig. 9 for Figure 8 Schematic diagram of the structural decomposition.

[0017] In the figure: 1. mounting frame; 2. hydraulic brake system; 3. brake pad body; 4. guide block; 5. side plate; 6. pressure chamber; 7. first piston; 8. moving plate; 9. spring; 10. one-way air guide tube; 11. drive chamber; 12. guide tube; 13. second piston; 14. push rod; 15. fixed gear plate; 16. rotating rod; 17. reciprocating screw; 18. moving block; 19. belt drive structure one; 20. detection rod; 21. drive shaft; 22. fixed gear; 23. transmission shaft; 24. torsion spring; 25. rotating shaft; 26. fixed gear ring; 27. transmission gear ring; 28. belt drive structure two; 29. ​​jack; 30. L-shaped plug rod; 31. oil pipe. DETAILED DESCRIPTION

[0018] Reference Figure 1 - Fig. 9 A disc brake pad with automatic gap detection includes a mounting frame 1, a hydraulic brake system 2 and two brake pad bodies 3. The two brake pad bodies 3 are mounted on the mounting frame 1 for sliding toward each other. The hydraulic brake system 2 is used to control the movement of the two brake pad bodies 3. The hydraulic brake system 2 is an existing technology used in existing disc brakes. When the driver steps on the brake pedal, the brake fluid is pressed into the piston of the brake caliper, pushing the piston to move outward, thereby clamping the brake pad and the brake disc to complete the braking operation.

[0019] The brake pad 10 also includes two reciprocating screws 17, which are both rotatably mounted on the mounting frame 1, and two moving blocks 18 are threadedly mounted on the two reciprocating screws 17, and two detection rods 20 are fixedly mounted on the lower end of each moving block 18, and each two detection rods 20 are respectively matched with the corresponding brake pad body 3, and the detection rod 20 is used to detect the thickness and surface flatness of the brake pad body 3. The detection rod 20 is provided with an ultrasonic detection element for short-distance detection, and the existing product can be specifically used. When the detection rod 20 moves relative to the brake pad body 3, the ultrasonic detection element can detect the distance between the surface of the brake pad body 3 and the detection rod 20, and the thickness of the brake pad body 3 can be obtained by calculating the difference between the distance and the initially set distance. At the same time, the ultrasonic detection element can also detect the flatness of the surface of the brake pad body 3. In order to facilitate the driver to know the test results, a test result display area can be set on the car dashboard, and the test results are displayed in the test result display area through electrical signals, so that the driver can replace the brake pad body 3 in time according to the test results to ensure driving safety.

[0020] Two guide blocks 4 are fixedly mounted on the side walls of the brake pad body 3, and a guide groove cooperating with the guide block 4 is provided on the mounting frame 1. The cooperation between the guide block 4 and the guide groove is used to limit the moving direction of the brake pad body 3. A side plate 5 is fixedly mounted on the side wall of one of the guide blocks 4, and a groove cooperating with the side plate 5 is provided on the side wall of the guide groove.

[0021] The driving part is used to store energy for the rotation of the reciprocating screw 17 during the braking process, and quickly drive the detection rod 20 to complete the detection process of the brake pad body 3 after a certain number of braking. The driving part includes a rotating rod 16 rotatably mounted on the mounting frame 1, and the rotating rod 16 is fixedly connected to one of the reciprocating screws 17. The reciprocating screw 17 is an existing reciprocating bidirectional screw, which has two thread grooves with the same pitch but opposite rotation directions. When rotating, it can drive the two moving blocks 18 to reciprocate in opposite directions at the same time. By rotating the reciprocating screw The specific specifications of 17 are set so that when it rotates one circle, the two moving blocks 18 drive the two detection rods 20 to approach and fit together and then realize the reset action. A belt transmission structure 19 is installed between the two reciprocating screws 17. The belt transmission structure 19 is a prior art, which makes the transmission ratio between the two reciprocating screws 17 1:1. Through the use of the belt transmission structure 19, the two reciprocating screws 17 can rotate in the same direction at the same time. When driving both of them, only one of the reciprocating screws 17 needs to be driven.

[0022] A pressurizing assembly matching with the brake pad body 3 is installed in the mounting frame 1, and an energy storage assembly matching with the pressurizing assembly is also installed in the mounting frame 1, and a transmission assembly is installed between the energy storage assembly and the rotating rod 16; The pressurizing assembly is composed of a pressure chamber 6, a first piston 7, a movable plate 8 and a spring 9. The pressure chamber 6 is fixedly installed in the mounting frame 1. The first piston 7 is sealed and slidably installed in the pressure chamber 6. The movable plate 8 is fixedly connected to the first piston 7 through a round rod, and a spring 9 is installed between the movable plate 8 and the pressure chamber 6. The pressure chamber 6 is arranged on the mounting frame 1 at a position between the two brake pad bodies 3, that is, at one end of the brake pad body 3 close to the brake disc of the automobile. When the brake is applied, the brake pad body 3 is close to the brake disc. At this time, the side plate 5 pushes the movable plate 8 to overcome the elastic force of the spring 9 and drive the first piston 7 to move in the pressure chamber 6 to the end away from the side plate 5; The energy storage assembly is composed of a driving chamber 11, a guide tube 12, a second piston 13 and a push rod 14. The driving chamber 11 is fixedly mounted in the mounting frame 1 at one end close to the rotating rod 16. The guide tube 12 is fixedly connected to the driving chamber 11. The second piston 13 is sealed and slidably mounted in the driving chamber 11. The push rod 14 is fixedly mounted on the side wall of the second piston 13, and the push rod 14 is sealed and slidably connected to the guide tube 12. A one-way air guide 10 is fixedly connected between the end of the pressure chamber 6 away from the moving plate 8 and the end of the driving chamber 11 away from the guide tube 12. When the plug 7 moves toward the end away from the side plate 5, the gas in the pressure chamber 6 at the end away from the moving plate 8 enters the driving chamber 11 in one direction through the one-way air guide 10, so that the air pressure in the driving chamber 11 increases, driving the second piston 13 to move a certain distance therein, and the movement of the second piston 13 drives the push rod 14 to move in the guide tube 12. By setting the relative volume of the pressure chamber 6 and the driving chamber 11, the push rod 14 can be moved a corresponding distance each time the brake is applied, so the number of brakes required when the push rod 14 moves to the maximum distance can be controlled; A one-way air inlet hole is opened at the end of the pressure chamber 6 away from the movable plate 8. When the brake pedal is released, the elastic force of the spring 9 resets the movable plate 8. At this time, the first piston 7 resets in the pressure chamber 6. The one-way air inlet hole is used to keep the air pressure in the pressure chamber 6 constant. An oil pipe 31 is fixedly connected between the end of the drive chamber 11 away from the one-way air guide pipe 10 and the hydraulic brake system 2. The design of the oil pipe 31 is used to input part of the brake oil into the drive chamber 11 during braking, thereby applying resistance to the movement of the second piston 13, so that the second piston 13 will not move during the braking process, and the push rod 14 will not move during the braking process. Since the movement of the push rod 14 provides a driving effect for the detection process, when the push rod 14 does not move, it can ensure that the detection rod 20 does not move, thereby avoiding the adverse effect of the position change of the detection rod 20 on the brake.

[0023] The transmission assembly is composed of a drive shaft 21, a fixed gear 22, a fixed tooth plate 15, a transmission shaft 23, a torsion spring 24 and a differential mechanism. The drive shaft 21 and the transmission shaft 23 are both rotatably mounted in the mounting frame 1, and the drive shaft 21 and the transmission shaft 23 are coaxial with the rotating rod 16. The fixed gear 22 is fixedly mounted on the drive shaft 21, the fixed tooth plate 15 is fixedly mounted on the push rod 14, and the fixed tooth plate 15 is meshed with the fixed gear 22. The torsion spring 24 is installed between the drive shaft 21 and the transmission shaft 23, and the differential mechanism is installed between the transmission shaft 23 and the rotating rod 16. When the push rod 14 is pushed, the fixed tooth plate 15 and the fixed tooth plate 15 are meshed. The meshing effect of the gear 22 drives the drive shaft 21 to rotate. The rotating rod 16 is provided with a socket 29 that is set through. The end of the push rod 14 away from the second piston 13 is fixedly installed with an L-shaped plug rod 30 that is plugged into the socket 29. When the push rod 14 has not moved to the maximum distance, the L-shaped plug rod 30 remains plugged into the socket 29. At this time, the rotating rod 16 remains fixed, and the rotating rod 16 is connected to the transmission shaft 23 through the transmission mechanism. Therefore, when the rotating rod 16 remains fixed, the transmission shaft 23 also remains fixed. At this time, the rotation of the drive shaft 21 will not drive the transmission shaft 23 to rotate, so the torsion spring 24 is deformed to store energy; When the push rod 14 moves to the maximum stroke, the L-shaped plug rod 30 is separated from the socket 29. At this time, the fixation of the rotating rod 16 is released, and the elastic force of the torsion spring 24 causes the transmission shaft 23 to rotate rapidly, and then drives the rotating rod 16 to rotate rapidly through the differential mechanism, so that the detection rod 20 automatically and quickly completes the detection and processing of the brake pad body 3, without the need to set up a power component externally. At the same time, the detection and processing is also carried out in the gap after the braking is completed, which will not have an adverse effect on the braking. In addition, the operation of the detection component is automatically performed after a certain number of braking times, and no manual detection is required. This is not only more convenient, but also can avoid problems such as brake failure caused by a large degree of wear of the brake pad body 3 due to long-term non-detection.

[0024] The differential mechanism consists of a rotating shaft 25, a fixed ring gear 26, a transmission ring gear 27 and a belt transmission structure 28. The rotating shaft 25 is rotatably installed in the mounting frame 1, the fixed ring gear 26 is fixedly installed on the side wall of the transmission shaft 23, the transmission ring gear 27 is fixedly installed on the rotating shaft 25, and the transmission ring gear 27 is meshed with the fixed ring gear 26. The belt transmission structure 28 is installed between the rotating shaft 25 and the rotating rod 16. The diameter of the transmission ring gear 27 is smaller than the diameter of the fixed ring gear 26. Through the design of the differential mechanism, the transmission shaft 23 can have a larger transmission ratio relative to the rotating shaft 25. Therefore, the driving shaft 21 only needs to rotate a smaller amplitude to drive the rotating rod 16 to rotate a larger amplitude, which can ensure that the rotation amplitude of the reciprocating screw 17 can meet the reciprocating process of the moving block 18 thereon, and at the same time, it can also avoid the problem of damage caused by the torsion spring 24 exceeding its maximum torsion angle. The belt transmission structure 28 is a prior art, and its working principle and specific structure are not elaborated here.

[0025] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A disc brake pad capable of automatic gap detection, comprising a mounting frame (1), a hydraulic brake system (2) and two brake pad bodies (3), characterized in that: Also includes: The two brake pad bodies (3) are mounted on the mounting frame (1) in a manner that they slide towards each other, and the hydraulic brake system (2) is used to control the movement of the two brake pad bodies (3); Two reciprocating screws (17), both of which are rotatably mounted on the mounting frame (1), and both of which are threadedly mounted with two moving blocks (18), and two detection rods (20) are fixedly mounted at the lower end of each of the moving blocks (18), and each of the two detection rods (20) is respectively matched with a corresponding brake pad body (3), and the detection rods (20) are used to detect the thickness and surface flatness of the brake pad body (3); A driving unit, the driving unit is used to store energy for the rotation of the reciprocating screw (17) during the braking process, and quickly drive the detection rod (20) to complete the detection process of the brake pad body (3) after a certain number of braking. The driving unit includes a rotating rod (16) rotatably mounted on the mounting frame (1), the rotating rod (16) is fixedly connected to one of the reciprocating screws (17), a pressurizing component matching the brake pad body (3) is installed in the mounting frame (1), and an energy storage component matching the pressurizing component is also installed in the mounting frame (1), and a transmission component is installed between the energy storage component and the rotating rod (16).

2. A disc brake pad capable of automatic gap detection according to claim 1, characterized in that: Two guide blocks (4) are fixedly mounted on the side walls of the brake pad body (3); a guide groove matching the guide blocks (4) is provided on the mounting frame (1); a side plate (5) is fixedly mounted on the side wall of one of the guide blocks (4); a groove matching the side plate (5) is provided on the side wall of the guide groove; and a belt transmission structure (19) is installed between the two reciprocating screws (17).

3. A disc brake pad capable of automatic gap detection according to claim 2, characterized in that: The pressurizing assembly is composed of a pressure chamber (6), a first piston (7), a movable plate (8) and a spring (9); the pressure chamber (6) is fixedly mounted in a mounting frame (1); the first piston (7) is sealingly slidably mounted in the pressure chamber (6); the movable plate (8) is fixedly connected to the first piston (7) via a round rod; and a spring (9) is installed between the movable plate (8) and the pressure chamber (6).

4. A disc brake pad capable of automatic gap detection according to claim 3, characterized in that: The energy storage assembly comprises a driving chamber (11), a guide tube (12), a second piston (13) and a push rod (14); the driving chamber (11) is fixedly mounted in the mounting frame (1) at one end close to the rotating rod (16); the guide tube (12) is fixedly connected to the driving chamber (11); the second piston (13) is sealingly slidably mounted in the driving chamber (11); the push rod (14) is fixedly mounted on the side wall of the second piston (13); and the push rod (14) is sealingly slidably connected to the guide tube (12).

5. A disc brake pad capable of automatic gap detection according to claim 4, characterized in that: A one-way air guide pipe (10) is fixedly connected between the end of the pressure chamber (6) away from the movable plate (8) and the end of the drive chamber (11) away from the guide pipe (12); a one-way air inlet hole is provided at the end of the pressure chamber (6) away from the movable plate (8); and an oil pipe (31) is fixedly connected between the end of the drive chamber (11) away from the one-way air guide pipe (10) and the hydraulic brake system (2).

6. A disc brake pad capable of automatic gap detection according to claim 4, characterized in that: The transmission assembly is composed of a drive shaft (21), a fixed gear (22), a fixed tooth plate (15), a transmission shaft (23), a torsion spring (24), and a differential mechanism. The drive shaft (21) and the transmission shaft (23) are both rotatably mounted in a mounting frame (1), and the drive shaft (21) and the transmission shaft (23) are both coaxial with a rotating rod (16). The fixed gear (22) is fixedly mounted on the drive shaft (21), the fixed tooth plate (15) is fixedly mounted on a push rod (14), and the fixed tooth plate (15) is meshed with the fixed gear (22). The torsion spring (24) is mounted between the drive shaft (21) and the transmission shaft (23), and the differential mechanism is mounted between the transmission shaft (23) and the rotating rod (16).

7. A disc brake pad capable of automatic gap detection according to claim 6, characterized in that: The differential mechanism is composed of a rotating shaft (25), a fixed gear ring (26), a transmission gear ring (27) and a second belt transmission structure (28); the rotating shaft (25) is rotatably mounted in a mounting frame (1); the fixed gear ring (26) is fixedly mounted on a side wall of a transmission shaft (23); the transmission gear ring (27) is fixedly mounted on the rotating shaft (25), and the transmission gear ring (27) is meshed with the fixed gear ring (26); the second belt transmission structure (28) is mounted between the rotating shaft (25) and a rotating rod (16); and the diameter of the transmission gear ring (27) is smaller than the diameter of the fixed gear ring (26).

8. The disc brake pad capable of automatic gap detection according to claim 4, characterized in that: The rotating rod (16) is provided with a plug hole (29) which is arranged to penetrate the rotating rod (16), and an L-shaped plug rod (30) which is plugged into and cooperates with the plug hole (29) is fixedly mounted on one end of the push rod (14) which is away from the second piston (13).

Images