Brake

Abstract

The utility model belongs to the technical field of electronic mechanical brakes, and particularly relates to a brake which comprises a brake pad, a brake disc, an abutting piece and a moving piece which are arranged in the same linear direction, the side, away from the brake pad, of the abutting piece is provided with a first arc-shaped face, and the moving piece is provided with a second arc-shaped face attached to the first arc-shaped face. The brake further comprises a connecting piece made of flexible materials, the connecting piece is arranged between the abutting piece and the moving piece, and the connecting piece can deform when the abutting piece is subjected to unbalance loading applied by the self-braking piece so that the abutting piece can deflect relative to the moving piece. According to the technical scheme, when the abutting part is subjected to the unbalance load, the connecting part can deform, so that the first arc-shaped surface and the second arc-shaped surface can deflect to unload the unbalance load, the unbalance load can be prevented from being transmitted to the moving part and the driving part, and the service life of the moving part and the service life of the driving part are prolonged.

Description

Technical Field

[0001] This utility model relates to the field of electromechanical brake technology, and in particular to a brake. Background Technology

[0002] Most automotive brakes currently use friction between friction pads and a brake disc to achieve braking. Specifically, the friction pads consist of an inner friction pad and an outer friction pad. The outer friction pad is mounted on a bracket, while the inner friction pad is mounted on the caliper. The caliper contains a piston and a ball screw assembly. Driven by a motor, the screw rotates, causing the nut to move linearly. This, in turn, pushes the piston out of the caliper, causing the inner and outer friction pads to move closer to the brake disc, thus achieving braking.

[0003] During the operation of the brake, the caliper body undergoes slight deformation, resulting in a small angular deviation between the cylinder bore axis of the caliper body and the axis of the friction plate. This deviation will generate an off-center load on the piston. Since the piston is often directly welded to the nut, this off-center load will be directly transmitted to the ball screw assembly, which will greatly shorten the life of the screw and nut in the ball screw assembly.

[0004] Therefore, existing technologies have adopted flexible piston structures as described in CN119062701 A, where there is a large arc between the piston and the brake block. The off-center load is unloaded through the arc. However, this solution has the problem that the contact arc of the brake block is difficult to process, and the waterproof and dustproof performance is poor, which can easily lead to external impurities such as water vapor and dust entering the electronic control unit.

[0005] Another approach uses a flexible piston structure, as described in CN115342143A, which adds a piston base to the outside of the piston, forming an arc-shaped connection between the piston base and the piston support. This connection structure achieves a flexible connection, but the ball joint structure increases installation space, and the dustproof structure is prone to failure.

[0006] Therefore, the above problems urgently need to be solved. Utility Model Content

[0007] The purpose of this invention is to provide a brake to avoid applying an off-center load to the ball screw assembly by the piston during braking, thereby improving the service life of the ball screw assembly.

[0008] To achieve this objective, the present invention adopts the following technical solution:

[0009] The brake includes a brake pad, a brake disc, an abutment, and a movable member disposed within the caliper body along the same straight direction. The movable member is capable of pushing the abutment towards the brake pad and causing the brake pad to abut against the brake disc.

[0010] The abutting member has a first arc-shaped surface on the side opposite to the brake pad, and the moving member has a second arc-shaped surface that fits into the first arc-shaped surface.

[0011] The brake also includes a connector made of a flexible material disposed between the abutment and the movable member, the connector being capable of deforming when the abutment is subjected to an off-center load applied by the brake pad, so as to cause the abutment to deflect relative to the movable member.

[0012] Preferably, one of the first arc-shaped surface and the second arc-shaped surface is a convex sphere, and the other is a concave sphere.

[0013] Preferably, a receiving groove is provided on the first arc-shaped surface;

[0014] The movable component includes a movable body and a connecting end. The movable body is movable along the straight line direction, and the second arc-shaped surface is disposed on the movable body. The connecting end is disposed at the end of the movable body and can extend into the interior of the receiving groove, and there is a gap between the connecting end and the receiving groove.

[0015] Preferably, the movable body has a connection hole on the side facing the connection end;

[0016] The connecting end includes a connecting portion that extends into the interior of the connecting hole and is fixed to the wall of the connecting hole.

[0017] Preferably, the connecting end further includes an end cap disposed on the connecting portion, the end cap being used to cover the connecting hole, and the end cap having a fixing hole on the side facing the abutment member;

[0018] The abutment is provided with a fixed shaft, and the connector is disposed between the fixed shaft and the fixed hole.

[0019] Preferably, the connector includes a base sleeved on the fixed shaft and elastic claws evenly arranged along the circumference of the base, the elastic claws engaging with the fixed hole.

[0020] Preferably, the fixed shaft is inserted into the fixed hole, and the fixed shaft and the fixed hole are in clearance fit.

[0021] The connector is a rubber element, which is compressed and disposed between the fixed shaft and the fixed hole.

[0022] Preferably, the abutting member is provided with a first mounting hole, the clamp body is provided with a second mounting hole, and the first mounting hole and the second mounting hole are respectively provided on both sides of the first arc-shaped surface;

[0023] The brake also includes a dust cover, one end of which is disposed in the first mounting hole and the other end of which is disposed in the second mounting hole.

[0024] Preferably, the abutting member has an abutting surface that abuts against the brake pad, the abutting surface being circular, or the abutting surface being provided with a lug.

[0025] Preferably, one of the abutting member and the moving member is provided with a positioning pin, and the other is provided with a positioning hole, with a gap between the positioning hole and the positioning pin.

[0026] The beneficial effects of this utility model are:

[0027] The brake of this invention allows the connecting member to deform when the abutting member is subjected to an off-center load applied by the self-braking pad. This causes the first arc-shaped surface and the second arc-shaped surface to deflect, thereby unloading the off-center load and preventing it from being transmitted to the moving member, thus improving the service life of the moving member and the driving member. Attached Figure Description

[0028] Figure 1 This is one of the structural schematic diagrams of the brake in the embodiments of this utility model;

[0029] Figure 2 This is the second schematic diagram of the brake structure in the embodiments of this utility model;

[0030] Figure 3 This is a schematic diagram of the structure of the abutment and the connecting end in an embodiment of this utility model;

[0031] Figure 4 This is one of the structural schematic diagrams of the moving part in the embodiments of this utility model;

[0032] Figure 5 This is the second structural schematic diagram of the movable component in the embodiments of this utility model;

[0033] Figure 6 This is a structural schematic diagram of the connector in an embodiment of this utility model;

[0034] Figure 7 This is the third schematic diagram of the brake structure in the embodiments of this utility model;

[0035] Figure 8 This is the fourth schematic diagram of the brake in the embodiments of this utility model.

[0036] In the picture:

[0037] 100. Brake pad; 200. Brake disc; 300. Caliper body; 310. Second mounting hole; 400. Dust cover;

[0038] 1. Abutting part; 11. First arc-shaped surface; 12. Abutting surface; 13. Receiving groove; 14. Fixed shaft; 15. Support lug; 16. Positioning pin; 17. First mounting hole;

[0039] 2. Moving part; 21. Second arc-shaped surface; 22. Moving body; 221. Connecting hole; 23. Connecting end; 231. End cap; 232. Connecting part; 233. Fixing hole; 24. Positioning hole;

[0040] 3. Driving components;

[0041] 4. Connector; 41. Base; 42. Elastic claw. Detailed Implementation

[0042] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0043] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0044] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0045] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0046] Please see Figures 1 to 8 This embodiment proposes a brake, including a brake pad 100, a brake disc 200, an abutment member 1, and a moving member 2, all arranged along the same straight line inside a caliper body 300. The moving member 2 can push the abutment member 1 towards the brake pad 100, causing the brake pad 100 to abut against the brake disc 200. Understandably, during braking, the moving member 2 can apply a driving force to the abutment member 1. Under this driving force, the brake pad 100 is pushed closer to and abuts against the brake disc 200, thus converting the driving force into braking force. Due to the friction between the brake disc 200 and the brake pad 100, the caliper body 300 will experience slight deformation, resulting in a small angular deviation between the cylinder bore axis of the caliper body 300 and the axis of the brake pad 100. This deviation will generate an off-center load on the abutment member 1. Since the existing abutment member 1 and the moving member 2 are rigidly connected, the off-center load can be transmitted to the moving member 2, thus affecting the service life of the moving member 2. Therefore, in this embodiment, the connection relationship between the abutment member 1 and the moving member 2 is changed to avoid the off-center load being transmitted to the moving member 2, thereby ensuring the service life of the moving member 2.

[0047] Specifically, the brake also includes a connector 4 made of flexible material, which is disposed between the abutment 1 and the moving member 2. The connector 4 is capable of deforming when the abutment 1 is subjected to an off-center load applied by the brake pad 100, so that the abutment 1 deflects relative to the moving member 2. The abutment 1 has a first arcuate surface 11 on the side opposite to the brake pad 100, and the moving member 2 has a second arcuate surface 21 that fits against the first arcuate surface 11.

[0048] Understandably, during braking, the mutual contact of the first arc-shaped surface 11 and the second arc-shaped surface 21 ensures the stability of the driving force during transmission, thereby guaranteeing the accuracy of braking force detection using a force sensor. Furthermore, since the first arc-shaped surface 11 and the second arc-shaped surface 21 are respectively located at the ends, the first arc-shaped surface 11 and the second arc-shaped surface 21 are easily machined during the processing of the abutment member 1 and the moving member 2. When the abutment member 1 is subjected to an off-center load applied by the brake pad 100, the connecting member 4 can deform, thereby allowing the first arc-shaped surface 11 and the second arc-shaped surface 21 to deflect, thus unloading the off-center load and preventing its transmission to the moving member 2, thereby improving the service life of the moving member 2.

[0049] In addition, the brake also includes a drive component 3 for driving the moving part 2 to move in a linear direction. The drive component 3 includes a screw and a rotary motor. The moving part 2 is screwed to the screw as a nut, and under the action of the rotary motor, it can drive the screw to rotate, thereby driving the moving part 2 to move in a linear direction. In some other feasible embodiments, the drive component 3 can also be other existing linear drive structures, which will not be described in detail here.

[0050] It should be noted that during the assembly process, the moving part 2 may scrape off the grease on the surface of the caliper body 300, which will reduce the service life of the brake. To this end, the outer surface of the moving part 2 is provided with spiral grooves to prevent the grease from being scraped off and to extend the service life.

[0051] Furthermore, a limiting protrusion is provided on the side of the end cap 231 facing the screw. It can be understood that after braking, the screw rotates in the opposite direction, thereby driving the moving part 2 to move away from the brake pad 100. When it moves to the limit position, the limiting protrusion abuts against the screw. Compared with the end cap 231 directly abutting against the screw, the contact area between the limiting protrusion and the screw is small, thereby avoiding the phenomenon of jamming between the limiting protrusion and the screw, thus ensuring the subsequent braking requirements.

[0052] In this embodiment, one of the first arc-shaped surface 11 and the second arc-shaped surface 21 is a convex sphere, and the other is a concave sphere. It is understood that both the moving member 2 and the abutting member 1 are cylindrical, and the first arc-shaped surface 11 is arranged along the circumference of the moving member 2, while the second arc-shaped surface 21 is arranged along the circumference of the abutting member 1. When an off-center load is generated, the abutting member 1 can be deflected in either direction, thereby further improving the stability of the brake during braking. Furthermore, the mutually fitting first arc-shaped surface 11 and second arc-shaped surface 21 can prevent external dust, rainwater, or other impurities from adhering to the driving member 3, thus providing dustproof and waterproof protection, and further improving the service life of the brake.

[0053] Furthermore, a receiving groove 13 is provided on the first arc-shaped surface 11. The moving member 2 includes a moving body 22 and a connecting end 23. The moving body 22 is connected to the driving member 3 and can move linearly under the action of the driving member 3. The second arc-shaped surface 21 is provided on the moving body 22, and the connecting end 23 is provided at the end of the moving body 22 and can extend into the interior of the receiving groove 13. There is a gap between the connecting end 23 and the receiving groove 13. It can be understood that the connecting member 4 is provided between the connecting end 23 and the abutment member 1, and is located in the middle of the first arc-shaped surface 11. When the first arc-shaped surface 11 and the second arc-shaped surface 21 are in contact, they can seal the receiving groove 13, thereby preventing external dust, rainwater or other impurities from adhering to the connecting member 4, so as to play a role in dustproofing and waterproofing, thereby further improving the service life of the brake. The gap setting can prevent interference when the first arc-shaped surface 11 and the second arc-shaped surface 21 deflect.

[0054] Furthermore, the movable body 22 has a connecting hole 221 on the side facing the connecting end 23; the connecting end 23 includes a connecting part 232, which extends into the interior of the connecting hole 221 and is fixed to the wall of the connecting hole 221. It is understood that the interior of the connecting hole 221 is provided with a thread adapted to be screwed onto the screw, and the connecting part 232 is fixed to the wall of the connecting hole 221. This not only prevents external dust, rainwater, or other impurities from adhering to the screw, but also prevents debris that falls off due to friction between the first arc-shaped surface 11 and the second arc-shaped surface 21 from adhering to the screw, thereby further ensuring the stability of the movable part 2 during movement.

[0055] The connection part 232 and the hole wall are either interference fit or the connection part 232 and the moving part 2 are integrally formed. This configuration can increase the sealing between the connection part 232 and the hole wall and prevent impurities from adhering to the driving part 3 through the gap between the connection part 232 and the hole wall.

[0056] In this embodiment, the connecting end 23 further includes an end cap 231 disposed on the connecting portion 232. The end cap 231 is used to cover the connecting hole 221, and a fixing hole 233 is provided on the side of the end cap 231 facing the abutment member 1. A fixing shaft 14 is provided on the abutment member 1, and the connecting member 4 is disposed between the fixing shaft 14 and the fixing hole 233. It can be understood that the end cap 231 can seal the connecting hole 221, thereby further preventing external dust, rainwater or some other impurities from adhering to the screw. Furthermore, with the cooperation between the fixing hole 233 and the fixing shaft 14, it is convenient to install the abutment member 1 into the moving member 2. Under the action of the connecting member 4, the abutment member 1 can have the freedom of deflection, so as to relieve the off-center load.

[0057] In another embodiment, such as Figure 5As shown, the end cap 231 of the connecting end is directly connected to the connecting hole 221 by riveting or welding to cover the connecting hole 221. There is no need to set an additional connecting part 232, thereby reducing the axial length of the moving part 2. In addition, compared with other embodiments where the circulator is set on the nut, in this embodiment the circulator is set on the lead screw, thereby further optimizing the axial length of the moving part 2.

[0058] In this embodiment, the connector 4 includes a base 41 sleeved on the fixed shaft 14 and elastic claws 42 evenly arranged circumferentially along the base 41. The elastic claws 42 engage with the fixing hole 233. It can be understood that with the cooperation of the elastic claws 42 and the fixing hole 233, the installation between the abutment 1 and the moving part 2 can be completed. When the abutment 1 is subjected to an off-center load, the elastic claws 42 can deform so that the abutment 1 can deflect, thereby preventing the off-center load from being transmitted to the moving part 2.

[0059] In addition, a locking hole is provided on the base 41, and a locking pin adapted to the mounting shaft is provided on the base 41. The locking pin and the locking hole are interference fit. This configuration can ensure the connection strength between the connecting member 4 and the abutting member 1, thereby preventing the separation of the first arc-shaped surface 11 and the second arc-shaped surface 21, and thus ensuring stability during the braking process.

[0060] Regarding connector 4, this embodiment also proposes another embodiment, such as... Figure 6 As shown, the fixed shaft 14 is inserted into the fixed hole 233, and there is a clearance fit between the fixed shaft 14 and the fixed hole 233; the connecting member 4 is a rubber element, which is compressed and disposed between the fixed shaft 14 and the fixed hole 233. It can be understood that when the abutment member 1 is subjected to an off-center load, the rubber element can further deform, allowing the abutment member 1 to deflect, thereby preventing the off-center load from being transmitted to the moving member 2. Preferably, the rubber element is an O-ring, as is common in the art.

[0061] In this embodiment, the abutment member 1 is provided with a first mounting hole 17, and the clamp body 300 is provided with a second mounting hole 310, with the first mounting hole 17 and the second mounting hole 310 respectively located on both sides of the first arc-shaped surface 11; the brake also includes a dust cover 400, with one end of the dust cover 400 located in the first mounting hole 17 and the other end located in the second mounting hole 310. This arrangement can cover the gap between the first arc-shaped surface 11 and the second arc-shaped surface 21, thereby further preventing external dust, rainwater, or other impurities from adhering to the drive member 3 or the connector 4.

[0062] In addition, a sealing ring is provided between the connecting part 232 and the connecting hole 221, and a sealing ring is also provided between the moving body 22 and the clamp body 300 at the end of the moving body 22 away from the second arc surface 21, so as to prevent external impurities such as water vapor and dust from entering the electronic control unit after the dust cover 400 is damaged.

[0063] In this embodiment, the abutting member 1 has an abutting surface 12 that abuts against the brake pad 100. The abutting surface 12 is circular, or the abutting surface 12 is provided with a lug 15. It is understood that the shape of the abutting surface 12 can be circular or irregular. Different shapes of the abutting surface 12 are selected according to actual needs, such as... Figure 7 As shown, the irregularly shaped contact surface 12 is provided with a lug 15 on the circular contact surface 12. Compared with the circular contact surface 12, it can increase the contact area between the contact surface 12 and the brake pad 100, thereby improving the braking performance of the brake.

[0064] Furthermore, a positioning pin 16 is provided on one of the abutment member 1 and the moving member 2, and a positioning hole 24 is provided on the other. A gap is provided between the positioning hole 24 and the positioning pin 16. It can be understood that the positioning hole 24 and the positioning pin 16 enable the abutment members 1 on different brakes, especially for irregularly shaped abutment members 1, to be in the same installation posture, so as to ensure the braking performance of the brake. Moreover, the gap provides a margin for the deflection of the abutment member 1, thereby preventing the abutment member 1 and the moving member 2 from completely jamming.

[0065] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A brake, characterized in that, The brake pad (100), brake disc (200), abutment (1), and moving member (2) are arranged in the same straight direction inside the caliper body (300). The moving member (2) can push the abutment (1) towards the brake pad (100) and cause the brake pad (100) to abut against the brake disc (200). The abutting member (1) has a first arc-shaped surface (11) on the side opposite to the brake pad (100), and the moving member (2) has a second arc-shaped surface (21) that fits against the first arc-shaped surface (11). The brake also includes a connector (4) made of a flexible material, which is disposed between the abutment (1) and the moving member (2). The connector (4) is capable of deforming when the abutment (1) is subjected to an off-center load applied by the brake pad (100) so that the abutment (1) deflects relative to the moving member (2).

2. The brake according to claim 1, characterized in that, One of the first arc-shaped surface (11) and the second arc-shaped surface (21) is a convex sphere, and the other is a concave sphere.

3. The brake according to claim 1, characterized in that, A receiving groove (13) is provided on the first arc-shaped surface (11); The movable component (2) includes a movable body (22) and a connecting end (23). The movable body (22) is movable along the straight line direction, and the second arc-shaped surface (21) is disposed on the movable body (22). The connecting end (23) is disposed at the end of the movable body (22) and can extend into the interior of the receiving groove (13). There is a gap between the connecting end (23) and the receiving groove (13).

4. The brake according to claim 3, characterized in that, The movable body (22) has a connection hole (221) on the side facing the connection end (23); The connecting end (23) includes a connecting part (232) which extends into the interior of the connecting hole (221) and is fixed to the hole wall of the connecting hole (221).

5. The brake according to claim 4, characterized in that, The connecting end (23) also includes an end cap (231) disposed on the connecting part (232), the end cap (231) is used to cover the connecting hole (221), and the end cap (231) has a fixing hole (233) on the side facing the abutment (1); The abutment (1) is provided with a fixed shaft (14), and the connector (4) is provided between the fixed shaft (14) and the fixed hole (233).

6. The brake according to claim 5, characterized in that, The connector (4) includes a base (41) sleeved on the fixed shaft (14) and elastic claws (42) evenly arranged around the base (41), the elastic claws (42) engaging with the fixed hole (233).

7. The brake according to claim 5, characterized in that, The fixed shaft (14) is inserted into the fixed hole (233), and the fixed shaft (14) and the fixed hole (233) are in clearance fit; The connector (4) is a rubber element, which is compressed and disposed between the fixed shaft (14) and the fixed hole (233).

8. The brake according to claim 1, characterized in that, The abutment (1) is provided with a first mounting hole (17), and the clamp body (300) is provided with a second mounting hole (310), and the first mounting hole (17) and the second mounting hole (310) are respectively provided on both sides of the first arc-shaped surface (11); The brake also includes a dust cover (400), one end of which is disposed in the first mounting hole (17) and the other end of which is disposed in the second mounting hole (310).

9. The brake according to claim 1, characterized in that, The abutting member (1) has an abutting surface (12) that abuts against the brake pad (100), the abutting surface (12) being circular, or the abutting surface (12) being provided with a lug (15).

10. The brake according to claim 1, characterized in that, A positioning pin (16) is provided on one of the abutting member (1) and the moving member (2), and a positioning hole (24) is provided on the other. A gap is provided between the positioning hole (24) and the positioning pin (16).

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