A self-adjusting brake

Abstract

The application discloses a brake with self-adjustable gap, and relates to the technical scheme as follows: a brake disc; a friction plate; a moving base used for pushing the friction plate to move, wherein a vacuum cavity is arranged on the side of the moving base close to the brake disc; a fixed plate arranged on the side of the moving base close to the brake disc, wherein the friction plate is fixed on the side of the fixed plate close to the brake disc; a positioning sleeve sleeved on the moving base to guide the sliding direction of the moving base; and an elastic member; by arranging the vacuum cavity, as the friction plate is worn, the moving distance of the moving base for pressing the friction plate on the brake disc is increased until the communication hole is communicated with the balance hole, the vacuum cavity is balanced with the atmospheric pressure, the effect of the air pressure is lost, and the friction plate is fed towards the direction close to the brake disc under the effect of the elastic member, so that the distance between the friction plate and the brake disc can be automatically adjusted along with the wear of the friction plate.

Description

Technical Field

[0001] This invention relates to the technical field of automotive braking, and more specifically, to a self-adjusting clearance brake. Background Technology

[0002] The automotive brake is the braking device of a car. Almost all automotive brakes are friction brakes. Electromechanical braking systems achieve the braking process by driving a mechanical mechanism with an electric motor, which greatly simplifies the structure of the braking system and makes the brake easier to arrange, assemble and maintain.

[0003] However, for current electromechanical braking systems, the brake mechanism often lacks an automatic brake clearance adjustment function, which can easily cause inconsistent brake power when the friction pads wear. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the present invention aims to provide a self-adjusting clearance brake. By setting a vacuum chamber, as the friction pad wears, the moving seat increases the distance by which the friction pad is pressed against the brake disc until the connecting hole connects with the balance hole. The vacuum chamber is then balanced with the external air pressure and loses the effect of air pressure. Under the action of the elastic element, the friction pad is fed towards the brake disc, so that the distance between the friction pad and the brake disc can be automatically adjusted as the friction pad wears.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a self-adjustable clearance brake, comprising a brake disc, the brake disc being mounted on an axle;

[0006] Friction pads, which can move toward and away from the brake disc and achieve braking through contact between the friction pads and the brake disc;

[0007] A movable seat is used to push the friction plate to move, and a vacuum chamber is provided on the side of the movable seat near the brake disc;

[0008] A fixing plate is provided on the side of the movable seat near the brake disc, and the friction pad is fixed on the side of the fixing plate near the brake disc;

[0009] A positioning sleeve is fitted over the movable seat to guide the sliding direction of the movable seat;

[0010] And an elastic element, which is used to apply a spring force toward the brake disc to the fixed plate;

[0011] The fixed plate is fixedly connected to a telescopic rod inserted into the vacuum chamber on the side near the movable seat. The air pressure in the vacuum chamber is lower than the external air pressure. A communication hole communicating with the vacuum chamber is provided on one side of the movable seat. The positioning sleeve closes the communication hole. A balance hole is provided in the movable seat to allow the communication hole to communicate with the outside. After the friction plate wears down, the communication hole communicates with the balance hole during the sliding process of the movable seat.

[0012] The present invention is further configured such that: a mounting hole is provided on the side of the movable seat near the fixed plate, and a guide rod is provided in the mounting hole; the guide rod slides in the mounting hole in the direction of approaching and moving away from the brake disc.

[0013] The mounting hole has receiving holes on both sides, and two sliding blocks that extend into the two receiving holes are fixedly connected to both sides of the guide rod. The elastic element is disposed in the receiving hole and applies an elastic force to the sliding block toward the brake disc.

[0014] The present invention is further configured such that a clamping component is provided at the end of the mounting hole away from the brake disc;

[0015] A clamping hole is provided on one side of the mounting hole away from the brake disc. The clamping assembly includes a clamping block and a spring member disposed in the clamping hole. The spring member applies a spring force to the clamping block to move toward the mounting hole. When the air pressure in the vacuum chamber is balanced with the outside and the friction pad is disengaged from the brake disc, the side of the clamping block near the brake disc is aligned with the end of the guide rod away from the brake disc so that the clamping block can be inserted into the mounting hole under the action of the spring member.

[0016] The present invention is further configured such that: the vacuum chamber is provided in two sets, and the two sets of vacuum chambers are respectively located near the two sides of the movable seat;

[0017] Each set includes a first vacuum chamber and a second vacuum chamber. A telescopic rod connected to a fixed plate is inserted into each vacuum chamber. The first vacuum chamber and the second vacuum chamber correspond to the first connecting hole and the second connecting hole, respectively. When the air pressure in the first vacuum chamber is less than the external air pressure, the second connecting hole is closed. When the air pressure in the first vacuum chamber is balanced with the external air pressure, the second connecting hole is opened.

[0018] The present invention is further configured such that: there are two abutting components in the mounting hole, the two abutting components are arranged along the sliding direction of the guide rod, the one closer to the guide rod is the second abutting component, and the one farther away from the guide rod is the first abutting component;

[0019] After the first vacuum chamber is balanced with the external air pressure, the clamping block in the first clamping assembly is inserted into the mounting hole. After the second vacuum chamber is balanced with the external air pressure, the clamping block in the second clamping assembly is inserted into the mounting hole.

[0020] The present invention is further configured such that: a lifting plate located inside the movable seat is provided at the second communicating hole, and a circular hole is provided on the lifting plate;

[0021] When the air pressure in the first vacuum chamber is less than the external air pressure, the round hole on the lifting plate is misaligned with the second connecting hole so that the lifting plate closes the second connecting hole. When the air pressure in the first vacuum chamber is balanced with the external air pressure, the round hole on the lifting plate connects with the second connecting hole.

[0022] The present invention is further configured such that: an elastic block is provided at the bottom of the lifting plate, the elastic block applies an elastic force to the lifting plate, and after the first vacuum chamber is balanced with the external air pressure, the elastic block pushes the lifting plate to move upward so that the round hole on the lifting plate communicates with the second connecting hole.

[0023] The present invention is further configured such that: there are two mounting holes, each mounting hole is provided with a guide rod, a clamping component and an elastic element; each mounting hole corresponds to a lifting plate;

[0024] The first clamping component at the mounting hole has a clamping block with a pressure rod fixedly connected to the end away from the mounting hole. When the clamping block is completely in the clamping hole, the top of the lifting plate is pressed against the bottom of the pressure rod. When the clamping block is inserted into the mounting hole, the pressure rod and the lifting plate are intersected. The lifting plate moves upward under the action of the elastic element so that the round hole on the lifting plate communicates with the second connecting hole.

[0025] The present invention is further configured such that the connecting holes on the two sets of vacuum chambers are respectively located on the opposite sides of the two sets of vacuum chambers;

[0026] The two sets of vacuum chambers correspond to the two mounting holes respectively, and the clamping component at the end of the mounting hole away from the brake disc is set on the side of the mounting hole close to the corresponding vacuum chamber.

[0027] The invention is further configured such that: the side of the movable seat away from the brake disc is provided with an air extraction nozzle corresponding to a plurality of vacuum chambers, and the air extraction nozzle is used to extract air from the corresponding vacuum chamber.

[0028] In summary, the present invention has the following advantages over the prior art: By setting up a vacuum chamber, as the friction pad wears, the moving seat increases the distance at which the friction pad is pressed against the brake disc until the connecting hole connects with the balance hole, the vacuum chamber is balanced with the external air pressure, and the air pressure is no longer used. Under the action of the elastic element, the friction pad is fed towards the brake disc, so that the distance between the friction pad and the brake disc can be automatically adjusted as the friction pad wears. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of the embodiment;

[0030] Figure 2 This is a schematic diagram of the movable base for an embodiment;

[0031] Figure 3 for Figure 2 Enlarged schematic diagram of part A;

[0032] Figure 4 This is a cross-sectional view illustrating the elastic element in the embodiment;

[0033] Figure 5 for Figure 4 Enlarged schematic diagram of part B;

[0034] Figure 6 This is a cross-sectional view illustrating the lifting platform in an embodiment;

[0035] Figure 7 for Figure 6 Enlarged schematic diagram of part C.

[0036] In the diagram: 1. Movable seat; 11. First vacuum chamber; 111. First connecting hole; 12. Second vacuum chamber; 121. Second connecting hole; 13. Mounting hole; 14. Receiving hole; 2. Positioning sleeve; 21. Balance hole; 3. Fixing plate; 31. Friction plate; 32. Telescopic rod; 33. Guide rod; 331. Sliding block; 332. Elastic element; 41. First pressing assembly; 42. Second pressing assembly; 43. Pressing block; 44. Elastic element; 45. Pressure rod; 5. Lifting plate; 51. Round hole; 6. Elastic block. Detailed Implementation

[0037] To enable those skilled in the art to better understand the technical solutions of the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Based on the embodiments in this application, other similar embodiments obtained by those skilled in the art without creative effort should all fall within the scope of protection of this application. Furthermore, directional terms mentioned in the following embodiments, such as "up," "down," "left," and "right," are only for reference to the directions in the accompanying drawings; therefore, the directional terms used are for illustrative purposes and not for limiting the invention.

[0038] The present invention will be further described below with reference to the accompanying drawings and preferred embodiments.

[0039] Example: A self-adjustable clearance brake, see attached document. Figure 1 -Appendix Figure 7It includes a brake disc mounted on the axle, a friction pad 31 for braking by sliding into contact with the brake disc, a movable seat 1 for moving the friction pad 31, a fixed plate 3 mounted on the movable seat 1 near the brake disc and fixedly connected to the friction pad 31, a positioning sleeve 2 sleeved on the movable seat 1, and an elastic element 332 mounted on the movable seat 1. The friction pad 31 can move closer to and further away from the brake disc and brakes are achieved through the contact between the friction pad 31 and the brake disc. The moving seat 1 moves the friction pad 31 by its own movement. A vacuum chamber is provided on the side of the moving seat 1 near the brake disc. A telescopic rod 32 inserted into the vacuum chamber is fixedly connected to the side of the fixed plate 3 near the moving seat 1. The air pressure in the vacuum chamber is lower than the outside air pressure. Under the action of the pressure difference between the inside and outside air, a pressure is applied to the fixed plate 3 in the direction of moving closer to the moving seat 1, so that the elastic force of the elastic element 332 is balanced with the pressure of the air pressure, thereby fixing the position of the friction pad 31. A connecting hole communicating with the vacuum chamber is provided on one side of the moving seat 1. The positioning sleeve 2 closes the connecting hole. A balance hole 21 is opened in the moving seat 1 to allow the connecting hole to communicate with the outside. The balance hole 21 is located on the side of the connecting hole closer to the brake disc. When the friction pad 31 is not worn, when the moving seat 1 pushes the friction pad 31 to fit against the brake disc, the balance hole 21 is still located on the side of the connecting hole closer to the brake disc. As the friction pad 31 wears, the distance between the connecting hole and the balance hole 21 shortens each time the friction pad 31 is pressed against the brake disc, until the connecting hole and the balance hole 21 are connected. At this time, the vacuum chamber is connected to the outside, so that the air pressure of the vacuum chamber is balanced with that of the outside. After the friction pad 31 is separated from the brake disc, after the air pressure is lost, the elastic element 332 pushes the fixing plate 3 to move away from the fixing plate 3 until the force acting on the fixing plate 3 is balanced again, thereby automatically adjusting the distance between the friction pad 31 and the brake disc.

[0040] Specifically, the movable seat 1 has a mounting hole 13 on the side near the fixed plate 3, and a guide rod 33 is provided in the mounting hole 13. The guide rod 33 slides in the mounting hole 13 in the direction of approaching and moving away from the brake disc. Receiving holes 14 are provided on both sides of the mounting hole 13. Two sliding blocks 331, respectively extending into the two receiving holes 14, are fixedly connected to both sides of the guide rod 33. An elastic element 332 is disposed in the receiving hole 14 and applies a spring force to the sliding block 331 to move towards the brake disc. Specifically, the elastic element 332 is a spring; the elastic element 332 is disposed on the side of the sliding block 331 away from the brake disc and is in a compressed state.

[0041] Specifically, a clamping component is provided at the end of the mounting hole 13 away from the brake disc; a clamping hole is provided at the end of the mounting hole 13 away from the brake disc. The clamping component includes a clamping block 43 and a spring element 44 disposed in the clamping hole. The spring element 44 applies a spring force to the clamping block 43 to move towards the mounting hole 13. When the air pressure in the vacuum chamber is balanced with the outside and the friction pad 31 is disengaged from the brake disc, the side of the clamping block 43 near the brake disc aligns with the end of the guide rod 33 away from the brake disc, so that the clamping block 43 can be inserted into the mounting hole 13 under the action of the spring element 44. After the clamping block 43 is inserted into the mounting hole 13 and contacts the end of the guide rod 33 away from the brake disc, the friction pad 31 is pressed against the brake disc without insufficient pressure due to a gap between the end of the guide rod 33 away from the brake disc and the end of the mounting hole 13 away from the brake disc. Specifically, the spring element 44 is a spring.

[0042] Specifically, two sets of vacuum chambers are provided, located near both sides of the movable base 1. By setting two sets of vacuum chambers near both sides of the movable base 1, the pressure and elastic force on the fixed plate 3 are more easily balanced, thus preventing the fixed plate 3 from tilting. Each set includes a first vacuum chamber 11 and a second vacuum chamber 12, and a telescopic rod 32 connected to the fixed plate 3 is inserted into each vacuum chamber. The first vacuum chamber 11 and the second vacuum chamber 12 correspond to the first connecting hole 111 and the second connecting hole 121, respectively. When the air pressure in the first vacuum chamber 11 is lower than the external air pressure, the second connecting hole 121 is closed; when the air pressure in the first vacuum chamber 11 is balanced with the external air pressure, the second connecting hole 121 is open. By setting two vacuum chambers in each set, the position of the friction plates 31 on both sides can be adjusted, improving the service life of the friction plates 31.

[0043] Specifically, there are two clamping components in the mounting hole 13. The two clamping components are arranged along the sliding direction of the guide rod 33. The one closer to the brake disc is the second clamping component 42, and the one farther away from the brake disc is the first clamping component 41. After the first vacuum chamber 11 is balanced with the external air pressure, the clamping block 43 in the first clamping component 41 is inserted into the mounting hole 13. After the second vacuum chamber 12 is balanced with the external air pressure, the clamping block 43 in the second clamping component 42 is inserted into the mounting hole 13. The side of the clamping block 43 of the first clamping component 41 that is away from the brake disc is flush with the end of the mounting hole 13 that is away from the brake disc.

[0044] A lifting plate 5 located inside the movable seat 1 is provided at the second connecting hole 121. The lifting plate 5 has a circular hole 51 and can move up and down at the second connecting hole 121. When the air pressure in the first vacuum chamber 11 is less than the external air pressure, the circular hole 51 on the lifting plate 5 is misaligned with the second connecting hole 121 so that the lifting plate 5 closes the second connecting hole 121. When the air pressure in the first vacuum chamber 11 is balanced with the external air pressure, the circular hole 51 on the lifting plate 5 connects with the second connecting hole 121.

[0045] A spring block 6 is provided at the bottom of the lifting plate 5. The spring block 6 applies a spring force to the lifting plate 5. After the first vacuum chamber 11 is balanced with the external air pressure, the spring block 6 pushes the lifting plate 5 to move upward so that the round hole 51 on the lifting plate 5 connects with the second connecting hole 121.

[0046] There are two mounting holes 13, each equipped with a guide rod 33, a clamping component, and an elastic element 332. Each mounting hole 13 corresponds to a lifting plate 5. A pressure rod 45 is fixedly connected to the end of the clamping block 43 of the first clamping component 41 at the mounting hole 13, away from the mounting hole 13. When the clamping block 43 is fully positioned in the clamping hole, the top of the lifting plate 5 abuts against the bottom of the pressure rod 45. When the clamping block 43 is inserted into the mounting hole 13, the pressure rod 45 and the lifting plate 5 intersect, and the lifting plate 5 moves upward under the action of the elastic element 332 to connect the circular hole 51 on the lifting plate 5 with the second connecting hole 121. Specifically, the elastic block 6 is a rubber block.

[0047] The connecting holes on the two sets of vacuum chambers are respectively located on the opposite sides of the two sets of vacuum chambers; the two sets of vacuum chambers correspond to the two mounting holes 13 respectively, and the clamping component at the end of the mounting hole 13 away from the brake disc is located on the side of the mounting hole 13 close to the corresponding vacuum chamber, so as to facilitate the contact between the lifting plate 5 corresponding to the second connecting hole 121 and the pressure rod 45.

[0048] Specifically, the side of the movable seat 1 away from the brake disc is provided with air extraction nozzles corresponding to multiple vacuum chambers, which are used to extract air from the corresponding vacuum chambers.

[0049] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A self-adjustable clearance brake, characterized in that: Includes a brake disc, which is mounted on the axle; Friction pad (31) that can move closer to and further away from the brake disc and achieve braking through contact between the friction pad (31) and the brake disc; The movable seat (1) is used to push the friction plate (31) to move, and the movable seat (1) is provided with a vacuum chamber on the side near the brake disc; A fixing plate (3) is provided on the side of the movable seat (1) near the brake disc, and the friction plate (31) is fixed on the fixing plate (3) near the brake disc. Positioning sleeve (2), which is fitted over the movable seat (1) to guide the sliding direction of the movable seat (1); And an elastic element (332) for applying a spring force toward the brake disc to the fixed plate (3); The fixed plate (3) is fixedly connected to the side of the movable seat (1) with a telescopic rod (32) inserted into the vacuum chamber. The air pressure in the vacuum chamber is lower than the external air pressure. The movable seat (1) has a communication hole that communicates with the vacuum chamber on one side. The positioning sleeve (2) closes the communication hole. The movable seat (1) has a balance hole (21) that allows the communication hole to communicate with the outside. After the friction plate (31) is worn, the movable seat (1) slides and the communication hole communicates with the balance hole (21).

2. The self-adjustable clearance brake according to claim 1, characterized in that: The movable seat (1) has a mounting hole (13) on the side near the fixed plate (3). A guide rod (33) is provided in the mounting hole (13). The guide rod (33) slides in the mounting hole (13) in the direction of approaching and moving away from the brake disc. The mounting hole (13) has receiving holes (14) on both sides. The guide rod (33) has two sliding blocks (331) that extend into the two receiving holes (14) respectively. The elastic element (332) is disposed in the receiving hole (14) and applies an elastic force to the sliding block (331) to move toward the brake disc.

3. The self-adjustable clearance brake according to claim 2, characterized in that: A clamping component is provided on one end of the mounting hole (13) away from the brake disc; A clamping hole is provided on one side of the mounting hole (13) away from the brake disc. The clamping assembly includes a clamping block (43) and an elastic member (44) disposed in the clamping hole. The elastic member (44) applies an elastic force to the clamping block (43) to move toward the mounting hole (13). When the air pressure in the vacuum chamber is balanced with the outside and the friction plate (31) is disengaged from the brake disc, the side of the clamping block (43) near the brake disc is aligned with the end of the guide rod (33) away from the brake disc so that the clamping block (43) can be inserted into the mounting hole (13) under the action of the elastic member (44).

4. A self-adjustable clearance brake according to claim 3, characterized in that: The vacuum chamber is provided in two sets, and the two sets of vacuum chambers are located on both sides near the movable seat (1); Each set includes a first vacuum chamber (11) and a second vacuum chamber (12). A telescopic rod (32) connected to the fixed plate (3) is inserted into each vacuum chamber. The first vacuum chamber (11) and the second vacuum chamber (12) correspond to the first connecting hole (111) and the second connecting hole (121) respectively. When the air pressure in the first vacuum chamber (11) is less than the external air pressure, the second connecting hole (121) is closed. When the air pressure in the first vacuum chamber (11) is balanced with the external air pressure, the second connecting hole (121) is opened.

5. A self-adjustable clearance brake according to claim 4, characterized in that: The mounting hole (13) contains two clamping components. The two clamping components are arranged along the sliding direction of the guide rod (33). The one closer to the guide rod (33) is the second clamping component (42), and the one farther away from the guide rod (33) is the first clamping component (41). After the first vacuum chamber (11) is balanced with the external air pressure, the abutting block (43) in the first abutting assembly (41) is inserted into the mounting hole (13). After the second vacuum chamber (12) is balanced with the external air pressure, the abutting block (43) in the second abutting assembly (42) is inserted into the mounting hole (13).

6. A self-adjustable clearance brake according to claim 5, characterized in that: A lifting plate (5) located inside the movable base (1) is provided at the second connecting hole (121), and a round hole (51) is provided on the lifting plate (5); When the air pressure in the first vacuum chamber (11) is less than the external air pressure, the round hole (51) on the lifting plate (5) is misaligned with the second connecting hole (121) so that the lifting plate (5) closes the second connecting hole (121). When the first vacuum chamber (11) is balanced with the external air pressure, the round hole (51) on the lifting plate (5) connects with the second connecting hole (121).

7. A self-adjustable clearance brake according to claim 6, characterized in that: The bottom of the lifting plate (5) is provided with an elastic block (6). The elastic block (6) applies an elastic force to the lifting plate (5). After the first vacuum chamber (11) is balanced with the external air pressure, the elastic block (6) pushes the lifting plate (5) to move upward so that the round hole (51) on the lifting plate (5) is connected to the second connecting hole (121).

8. A self-adjustable clearance brake according to claim 7, characterized in that: There are two mounting holes (13), and each mounting hole (13) is provided with a guide rod (33), a clamping component and an elastic element (332); each mounting hole (13) corresponds to a lifting plate (5); The first abutting component (41) at the mounting hole (13) has a pressing rod (45) fixedly connected to the end of the abutting block (43) away from the mounting hole (13). When the abutting block (43) is completely located in the abutting hole, the top of the lifting plate (5) abuts against the bottom of the pressing rod (45). When the abutting block (43) is inserted into the mounting hole (13), the pressing rod (45) and the lifting plate (5) are intersected. The lifting plate (5) moves upward under the action of the elastic element (332) so that the round hole (51) on the lifting plate (5) communicates with the second connecting hole (121).

9. A self-adjustable clearance brake according to claim 8, characterized in that: The connecting holes on the two sets of vacuum chambers are respectively located on the opposite sides of the two sets of vacuum chambers; The two sets of vacuum chambers correspond to the two mounting holes (13) respectively. The clamping component at the end of the mounting hole (13) away from the brake disc is set on the side of the mounting hole (13) close to the corresponding vacuum chamber.

10. A self-adjustable clearance brake according to claim 9, characterized in that: The movable seat (1) is provided with an air extraction nozzle on the side away from the brake disc, which corresponds to a plurality of vacuum chambers. The air extraction nozzle is used to extract the air from the corresponding vacuum chamber.

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