A vehicle brake friction plate return power mechanism and vehicle brake system

Abstract

This invention relates to the field of vehicle component technology, specifically to a vehicle brake pad return power mechanism and a vehicle braking system. The vehicle brake pad return power mechanism may include a first elastic unit, a second elastic unit, and a limiting unit. The first elastic unit includes a first elastic segment. The first elastic unit, the second elastic unit, and the limiting unit are integrally formed sequentially. The limiting unit includes a first limiting portion, which is disposed opposite to the first elastic unit. A receiving space exists between the first limiting portion and the first elastic unit. The connection portion between the second elastic unit and the limiting unit protrudes towards the receiving space. A vehicle braking system may include a vehicle brake pad return power mechanism, a brake pad, and a brake caliper bracket. This solves the problem of poor return force caused by the vehicle brake pad return power mechanism easily exceeding its fatigue limit.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle parts, and in particular to a vehicle brake friction plate return power mechanism and a vehicle brake system. Background Art

[0002] Vehicle brake friction pads are important components in the vehicle braking system. Their main function is to generate resistance through friction to slow down or stop the vehicle. Vehicle brake friction pads, also known as brake pads, are friction materials fixed on the rotating parts of the wheel or in the brake caliper. They slow down or stop the rotation of the wheel by friction with the brake disc or brake drum. According to the installation method and the use environment, brake friction pads can be divided into two types: disc brake pads and drum brake pads. Disc brake pads are mostly used in passenger cars and light commercial vehicles, while drum brake pads are used in some heavy vehicles and specific occasions. Brake pads of different materials have different performance characteristics, such as wear resistance, braking effect, noise level, etc. When the braking system is used, the kinetic energy of the vehicle is converted into heat energy. At this time, the brake friction pads are pressed against the brake disc and slow down the vehicle. After the braking process is completed, when the brake is released, the brake friction pads need to return to their static position. The return power mechanism is a key component in the braking system to ensure that the friction pads can smoothly detach from the brake disc and return to their initial position after braking. By installing an elastic plate inside the brake caliper or brake caliper, the elastic force of the elastic plate is used to push the friction plate away from the brake disc after the brake is released. This mechanism is simple and reliable and is widely used in various vehicles.

[0003] However, the current friction plate return power mechanism usually uses an elastic plate to apply elastic force to the friction plate to drive the friction plate to return. When the return force of the elastic plate exceeds the tolerance range, it will easily detach from the brake caliper bracket. In addition, the elastic plate has a limited expansion and contraction range, and it is easy to exceed the fatigue limit to produce irreversible deformation, resulting in a short service life, thereby resulting in poor return force of the vehicle brake friction plate return power mechanism. Summary of the invention

[0004] In order to solve the problem that a vehicle brake friction pad return power mechanism easily exceeds the fatigue limit and causes poor return force, the present invention provides a vehicle brake friction pad return power mechanism and a vehicle braking system.

[0005] In a first aspect, the present invention provides a vehicle brake friction pad return power mechanism, comprising:

[0006] a first elastic unit; the first elastic unit comprises a first elastic segment; the projection of the first elastic segment in the reference plane is wavy; the angle of the bending part of the projection of the first elastic segment in the reference plane is a first angle; the projection of the first elastic segment in the reference plane has a plurality of intersections with a first reference line; the first reference line is located in the reference plane;

[0007] A second elastic unit; a second angle is formed between the projection of the second elastic unit in the reference plane and a second reference line; the second reference line is located in the reference plane; the second reference line is perpendicular to the first reference line;

[0008] A limiting unit; the first elastic unit, the second elastic unit and the limiting unit are integrally formed in sequence; the limiting unit comprises a first limiting portion, the first limiting portion and the first elastic unit are arranged opposite to each other; there is a accommodating space between the first limiting portion and the first elastic unit; the connecting portion between the second elastic unit and the limiting unit is convex toward the accommodating space.

[0009] In some embodiments, when the vehicle brake friction pad return power mechanism is in a natural state, the first angle is 25°~35°.

[0010] In some embodiments, the first elastic unit further includes a second elastic section; the second elastic section includes a first transition plate and a second transition plate; the first elastic section, the first transition plate, the second transition plate and the second elastic unit are integrally formed in sequence; the angle between the first transition plate and the second transition plate is a third angle; when the vehicle brake friction plate return power mechanism is in a natural state, the third angle and the first angle satisfy the following formula:

[0011] (2*α1)<α3<75°;

[0012] Among them, α1 is the first angle, and α3 is the third angle.

[0013] In some embodiments, the first elastic unit also includes a connecting plate; the connecting plate is perpendicular to the reference plane; the end of the first elastic segment away from the second elastic unit is integrally formed with the connecting plate; the angle between the end of the first elastic segment close to the connecting plate and the connecting plate is a fourth angle; when the vehicle brake friction pad return power mechanism is in a natural state, the fourth angle is greater than 160°.

[0014] In some embodiments, the thickness of the second elastic unit is greater than the thickness of the first elastic unit; and the width of the second elastic unit is greater than the width of the first elastic unit.

[0015] In some embodiments, the limiting unit further includes a second limiting portion; the first limiting portion, the second limiting portion and the second elastic unit are integrally formed in sequence; the angle between the projection of the first limiting portion in the reference plane and the first reference line is a fifth angle; the angle between the projection of the second limiting portion in the reference plane and the second reference line is a sixth angle;

[0016] When the vehicle brake friction plate return power mechanism is in a natural state, the fifth angle is 5° to 10°; the fifth angle and the sixth angle satisfy the following formula:

[0017] α5<α6<15°;

[0018] Among them, α5 is the fifth angle; α6 is the sixth angle.

[0019] In some embodiments, the vehicle brake friction pad return power mechanism is in the projection of the reference plane; the end of the first elastic unit away from the second elastic unit is located on the second reference line; the distance from the connection part of the first elastic unit and the second elastic unit to the second reference line is the first distance; the distance from the connection part of the second elastic unit and the limiting unit to the second reference line is the second distance; the distance from the connection part of the first limiting part and the second limiting part to the second reference line is the third distance; the first distance, the second distance and the third distance satisfy the following formula:

[0020] L2<L3<(L1*2 / 3);

[0021] Among them, L1 is the first distance; L2 is the second distance; L3 is the third distance.

[0022] In some embodiments, the sixth angle and the second angle satisfy the following formula:

[0023] 30°<α2<3*α6;

[0024] Wherein, α2 is the second angle.

[0025] In some embodiments, the first limiting portion includes a first limiting plate and a barb, and one end of the first limiting plate is integrally formed with the second limiting portion; the fifth angle is the angle between the projection of the first limiting plate on the reference plane and the first reference line; the barb is integrally formed with the first limiting plate; the barb protrudes from a side of the first limiting plate facing the first elastic unit; and an end of the barb away from the first limiting plate points to the second limiting portion.

[0026] In some embodiments, two limiting units are provided, and the distance between the two limiting units gradually increases in a direction away from the second elastic unit.

[0027] In a second aspect, the present invention provides a vehicle braking system, comprising:

[0028] The vehicle brake friction pad return power mechanism as described in any one of the first aspects;

[0029] Friction plate; one end of the first elastic unit away from the second elastic unit is fixedly connected to the friction plate;

[0030] A brake caliper bracket; a portion of the brake caliper bracket is located in the accommodating space; a connecting portion between the second elastic unit and the limiting unit is pressed against the brake caliper bracket; an end of the first limiting portion away from the second elastic unit is pressed against the brake caliper bracket; and a gap is provided between the first elastic unit and the brake caliper bracket.

[0031] In order to solve the problem of poor return force of the return power mechanism of the vehicle brake friction plate, the present invention has the following advantages:

[0032] When the friction plate needs to return, the first elastic unit in the vehicle brake friction plate return power mechanism undergoes a first-level deformation to generate a first-level return force. When the friction plate gradually increases with wear and the required return force gradually increases, the second elastic unit undergoes a second-level deformation to generate a second-level return force. Therefore, the second elastic unit can be used to cooperate with the first elastic unit to form a secondary deformation to increase the deformation limit and the return force. Since the deformation of the first elastic unit is large, the deformation of the second elastic unit can be designed to be small, so that the distance from the connection part of the second elastic unit and the first elastic unit to the second reference line can be reduced, thereby saving space. In addition, the limiting unit is used to cooperate with the second elastic unit, so that the second elastic unit is not easy to separate from the brake caliper bracket when the allowable deformation of the second elastic unit is small, even if the friction plate is severely worn and a large pulling force is generated. Therefore, the vehicle brake friction plate return power mechanism is formed by the mutual cooperation of the first elastic unit, the second elastic unit and the limiting unit, so that the friction plate is applied with sufficient return force by using the secondary elastic deformation, and the allowable deformation is large and it is not easy to separate from the brake caliper bracket. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 A front view of a conventional elastic sheet is shown;

[0034] Figure 2 A schematic structural diagram of a vehicle brake friction pad return power mechanism according to an embodiment is shown;

[0035] Figure 3 A front view of a vehicle brake friction pad return power mechanism according to an embodiment is shown;

[0036] Figure 4 A schematic structural diagram of a vehicle braking system according to an embodiment is shown;

[0037] Figure 5 A schematic structural diagram of a friction plate and a vehicle brake friction plate return power mechanism according to an embodiment is shown.

[0038] Figure markings: first elastic unit 10; first elastic section 11; second elastic section 12; first transition plate 121; second transition plate 122; connecting plate 13; second elastic unit 20; limiting unit 30; first limiting portion 31; first limiting plate 311; barb 312; guide plate 313; second limiting portion 32; first reference line 40; second reference line 50; friction plate 60; brake caliper bracket 70; elastic plate 80; connecting end 81; abutting end 82; bending part 83. DETAILED DESCRIPTION

[0039] The present disclosure will now be discussed with reference to several exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and thus implement the present disclosure, rather than implying any limitation on the scope of the present disclosure.

[0040] As used herein, the term "including" and its variants are to be interpreted as open-ended terms meaning "including but not limited to". The term "based on" is to be interpreted as "based at least in part on". The terms "one embodiment" and "an embodiment" are to be interpreted as "at least one embodiment". The term "another embodiment" is to be interpreted as "at least one other embodiment". The orientation or position relationship indicated by the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "vertical", "horizontal", "lateral", "longitudinal" and the like is based on the orientation or position relationship shown in the accompanying drawings. These terms are mainly for better describing the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation. In addition, in addition to being used to indicate an orientation or position relationship, some of the above terms may also be used to indicate other meanings, such as the term "upper" may also be used to indicate a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to the specific circumstances. In addition, the terms "install", "set", "provided with", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be an internal connection between two devices, elements or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances. In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise specified, "plurality" means two or more.

[0041] In this embodiment, the brake system of a common vehicle may be composed of a piston, a friction plate, a return power mechanism, etc. The return power mechanism is a key component of the vehicle brake, and its main function is to enable the friction plate to automatically return to the initial position or a predetermined position after the vehicle brakes the friction plate. When the friction plate needs to return, the vehicle brake friction plate return power mechanism releases the return force, so that the friction plate completes the return action. In a common vehicle brake system, such as Figure 1 As shown, the vehicle brake friction plate return power mechanism is a bent elastic sheet 80, one end of the elastic sheet 80 is a connecting end 81, and the other end is an abutting end 82. The connecting end 81 can be riveted to the vehicle friction plate, and the abutting end 82 can abut on the blank surface of the brake caliper bracket away from the friction plate. The bending part 83 of the friction plate is located on the side of the abutting end 82 away from the connecting end 81. When the friction plate is braked by the thrust of the piston, the connecting end 81 of the elastic sheet 80 moves with the friction plate, thereby pulling the bending part 83 to move toward the connecting end 81. In order to ensure a larger deformation limit, it is necessary to set the distance from the bending part 83 to the abutting end 82 to be longer. The friction between the abutting end 82 and the blank surface of the brake caliper bracket is large and is not easy to move. This will cause the bending part 83 of the elastic sheet 80 to move in an arc with the abutting end 82 as the center when subjected to tension, that is, the angle β2 of the connection part between the elastic sheet 80 and the friction plate will be reduced to β1, so that the angle of the connection end 81 of the elastic sheet 80 is too small, which will cause irreversible deformation. Therefore, the conventional elastic sheet 80 has the problems of large size, easy to cause irreversible deformation and failure, and insufficient return force. In order to solve the above problems, Figure 2 As shown, this embodiment discloses a vehicle brake friction pad return power mechanism which may include: a first elastic unit 10 , a second elastic unit 20 , and a limiting unit 30 .

[0042] like Figure 3 , Figure 4 As shown, Figure 3 The front view of the return power mechanism of the vehicle brake friction plate 60 is a schematic projection diagram in the reference plane. The first elastic unit 10 may include a first elastic section 11. The first reference line 40 is located in the reference plane. The projection of the first elastic section 11 in the reference plane may be wavy. The angle of the bending part of the projection of the first elastic section 11 in the reference plane is the first angle α1. As an example, the first elastic section 11 has three first angles α1 of the same angle, so that the first elastic section 11 is wavy. The projection of the first elastic section 11 in the reference plane may have multiple intersections with the first reference line 40. The wavy first elastic section 11 has a large elastic deformation limit and a good service life. It can be deformed under the pulling force of the friction plate 60 and can quickly return to its original shape after the pulling force is removed.

[0043] like Figure 3 , Figure 4 As shown, the second elastic unit 20 can be integrally formed with the first elastic unit 10. The second reference line 50 is located in the reference plane. The second reference line 50 is perpendicular to the first reference line 40. There is a second angle α2 between the projection of the second elastic unit 20 in the reference plane and the second reference line 50. When the friction plate 60 moves, it pulls the first elastic section 11, causing the first elastic section 11 to deform, and the first angle α1 increases. When the elastic deformation of the wavy first elastic section 11 is too large, it will pull the second elastic unit 20 to deform, and the second angle α2 will decrease. Therefore, the second elastic unit 20 can be used to cooperate with the first elastic unit 10 to form a secondary elastic deformation. Since the deformation limit of the first elastic unit 10 is large, the deformation amount of the second elastic unit 20 can be designed to be smaller, that is, the angle of the second angle α2 is reduced. Thereby, while ensuring the return force of the return power mechanism of the vehicle brake friction plate 60, the distance from the connection part of the second elastic unit 20 and the first elastic unit 10 to the second reference line 50 can be reduced, thereby saving space.

[0044] like Figure 3 , Figure 4 As shown, the limiting unit 30 can be located at one end of the second elastic unit 20 away from the first elastic unit 10. The first elastic unit 10, the second elastic unit 20 and the limiting unit 30 are integrally formed in sequence. The limiting unit 30 includes a first limiting portion 31, and the first limiting portion 31 is arranged opposite to the first elastic unit 10. There is an accommodation space between the first limiting portion 31 and the first elastic unit 10. The connection part between the second elastic unit 20 and the limiting unit 30 is convex toward the accommodation space. The first limiting portion 31 can be used to stably fix the return power mechanism of the vehicle brake friction plate 60 on the blank surface of the brake caliper bracket 70 parallel to the second reference line 50. Even when the friction plate 60 is severely worn and needs to generate a large moving distance, resulting in a large degree of deformation of the return power mechanism of the vehicle brake friction plate 60, it is not easy to separate from the brake caliper bracket 70 and the friction plate 60 can be restored to its original position by the sufficient return force of the first elastic unit 10 and the second elastic unit 20.

[0045] In this embodiment, if Figure 3 , Figure 4As shown, the first angle α1 of the return power mechanism of the vehicle brake friction plate 60 is 25°~35° in the natural state. If the first angle α1 is too large, the deformation limit of the first elastic unit 10 will be small. If the first angle α1 is too small, the initial elastic force will be small, which is not conducive to the return of the friction plate 60. Therefore, the angle of the first angle α1 is within the range of 25°~35°, which can not only ensure that the first elastic unit 10 has sufficient return force, but also ensure that the first elastic unit 10 has a large allowable deformation, and is not prone to permanent deformation, thereby extending the anti-fatigue time of the return power mechanism of the vehicle brake friction plate.

[0046] In this embodiment, if Figure 3 As shown, the first elastic unit 10 may further include a second elastic section 12. The second elastic section 12 may include a first transition plate 121 and a second transition plate 122. The first elastic section 11, the first transition plate 121, the second transition plate 122 and the second elastic unit 20 may be integrally formed in sequence. The angle between the first transition plate 121 and the second transition plate 122 may be a third angle α3.

[0047] When the vehicle brake friction plate return power mechanism is in a natural state, the third angle α3 and the first angle α1 satisfy the following formula:

[0048] (2*α1)<α3<75°;

[0049] Among them, α1 can be the first angle, and α3 can be the third angle. Since the third angle α3 is set to be relatively large, the angle between the second transition plate 122 and the second elastic unit 20 can be increased to a certain extent, and since the second angle α2 itself can be set to be relatively small, the angle between the second transition plate 122 and the second elastic unit 20 will not be too small. As a result, the connection part between the first elastic unit 10 and the second elastic unit 20 has the characteristic of being easy to process. The connection part between the first elastic unit 10 and the second elastic unit 20 is not prone to stress concentration, which prolongs the anti-fatigue time.

[0050] In this embodiment, if Figure 3 , Figure 4As shown, the first elastic unit 10 may further include a connecting plate 13. The connecting plate 13 may be perpendicular to the reference plane. The end of the first elastic section 11 away from the second elastic unit 20 may be integrally formed with the connecting plate 13. The connecting plate 13 and the friction plate 60 may be connected by riveting, thereby ensuring the stable fixation of the friction plate 60 and the connecting plate 13. The angle between the end of the first elastic section 11 close to the connecting plate 13 and the connecting plate 13 has a fourth angle α4. In the natural state of the vehicle brake friction plate return power mechanism, the fourth angle α4 is greater than 160°. If the angle of the fourth angle α4 is too small, stress concentration is likely to occur at the fourth angle α4, resulting in the risk of cracking at the fourth angle α4 during use. Therefore, in this embodiment, setting the fourth angle α4 to be greater than 160° can make the stress at the angle between the end of the first elastic section 11 close to the connecting plate 13 and the connecting plate 13 more dispersed, thereby extending the service life of the fourth angle α4 and improving the stability of the friction plate 60 and the vehicle brake friction plate return power mechanism.

[0051] In this embodiment, if Figure 3 , Figure 4 As shown, the thickness of the second elastic unit 20 can be greater than the thickness of the first elastic unit 10. The width of the second elastic unit 20 can be greater than the width of the first elastic unit 10. When the vehicle brake friction plate return power mechanism is subjected to a large pulling force, due to the increase in the thickness and width of the second elastic unit 20, its structural strength and durability are enhanced, and the elastic modulus also increases accordingly, so the return force of the second elastic unit 20 will also increase. When the friction plate 60 is less worn, the pulling force on the vehicle brake friction plate return power mechanism will also be smaller, and the friction plate 60 can be returned by the first elastic unit 10. When the friction plate 60 is used for too long and the degree of wear is high, the pulling force on the vehicle brake friction plate return power mechanism will also be large. At this time, the friction plate 60 can be returned by the return force of the first elastic unit 10 and the second elastic unit 20.

[0052] In this embodiment, if Figure 3 , Figure 4As shown, the limiting unit 30 may further include a second limiting portion 32. The first limiting portion 31, the second limiting portion 32 and the second elastic unit 20 may be integrally formed in sequence. The angle between the projection of the first limiting portion 31 in the reference plane and the first reference line 40 may be a fifth angle α5, so that the end of the first limiting portion 31 away from the second limiting portion 32 is pressed against the blank surface of the brake caliper bracket 70 away from the first elastic unit 10, thereby realizing the fastening of the limiting unit 30 to the brake caliper bracket 70. The angle between the projection of the second limiting portion 32 in the reference plane and the second reference line 50 may be a sixth angle α6, so that a bending portion is formed at the connection between the second limiting portion 32 and the second elastic unit 20, and the bending portion is pressed against the blank surface of the brake caliper bracket 70 away from the friction plate 60. Thereby, the vehicle brake friction plate return power mechanism is more stably fixed on the brake caliper bracket 70.

[0053] When the vehicle brake friction plate return power mechanism is in a natural state, the fifth angle α5 is 5°~10°. The fifth angle α5 and the sixth angle α6 satisfy the following formula:

[0054] α5<α6<15°;

[0055] Among them, α5 can be the fifth angle, and α6 can be the sixth angle. If the fifth angle α5 and the sixth angle α6 are too large, the elastic force of the limit unit 30 will be small when the first elastic unit 10 and the second elastic unit 20 are subjected to a large pulling force, which is not conducive to the vehicle brake friction pad return power mechanism being fastened to the brake caliper bracket 70. Therefore, when the fifth angle α5 and the sixth angle α6 are set to be small, they have a large elastic force, thereby ensuring that the vehicle brake friction pad return power mechanism is not easy to separate from the brake caliper bracket 70.

[0056] In this embodiment, if Figure 3 , Figure 4 As shown, the vehicle brake friction pad return power mechanism is projected on the reference plane. The end of the first elastic unit 10 away from the second elastic unit 20 is located on the second reference line 50. The distance from the connection part of the first elastic unit 10 and the second elastic unit 20 to the second reference line 50 is the first distance L1. The distance from the connection part of the second elastic unit 20 and the limiting unit 30 to the second reference line 50 is the second distance L2. The distance from the connection part of the first limiting portion 31 and the second limiting portion 32 to the second reference line 50 is the third distance L3.

[0057] The first distance L1, the second distance L2 and the third distance L3 satisfy the following formula:

[0058] L2<L3<(L1*2 / 3);

[0059] Among them, L1 is the first distance; L2 is the second distance; L3 is the third distance. In this way, ensuring the length of the first distance L1 can ensure that the first elastic unit 10 has sufficient deformation, so as to adapt to the different wear degrees of the friction plate 60. The shorter the second distance L2 is, the tighter the connection between the second elastic unit 20 and the limiting unit 30 is against the blank surface of the brake caliper bracket 70 away from the friction plate 60. In this way, the tighter the contact will be. In this way, the limiting unit 30 is fastened to the brake caliper bracket 70, so that the vehicle brake friction plate return power mechanism is not easy to separate from the brake caliper bracket 70. The third distance L3 is greater than the second distance L2 in order to have a certain angle between the second limiting portion 32 and the blank surface of the brake caliper bracket 70, that is, the sixth angle α6, so that the limiting unit can apply a certain elastic force to the brake caliper bracket 70, thereby preventing the second elastic unit 20 from separating from the brake caliper bracket 70 as much as possible. The first distance L1, the second distance L2, and the third distance L3 are interrelated to ensure that the three are within a suitable range. Therefore, the vehicle brake friction pad return power mechanism is not easily separated from the brake caliper bracket 70 and has sufficient return force and elastic deformation range.

[0060] In this embodiment, the sixth angle α6 and the second angle α2 satisfy the following formula:

[0061] 30°<α2<3*α6;

[0062] Wherein, α2 is the second angle. Thus, by ensuring the angle of the second angle α2, it is possible to ensure that the second elastic unit 20 has sufficient deformation, thereby adapting to different degrees of wear of the friction plate 60. Thus, sufficient return force can be released to restore the friction plate 60 to the initial position. By ensuring the angle of the sixth angle α6, it is possible to ensure that the second limiter 32 has a large elastic force, thereby ensuring that the vehicle brake friction plate return power mechanism is not easy to separate from the brake caliper bracket 70.

[0063] In this embodiment, if Figure 3 , Figure 4As shown, the first limiting portion 31 may include a first limiting plate 311 and a barb 312, and one end of the first limiting plate 311 may be integrally formed with the second limiting portion 32. The fifth angle α5 is the angle between the projection of the first limiting plate 311 on the reference plane and the first reference line 40. The fifth angle α5 may cause the end of the first limiting plate 311 connected to the guide plate 313 to be in an inward buckling trend toward the first elastic unit 10, so that the first limiting plate 311 may be clamped on the brake caliper bracket 70. The barb 312 may be integrally formed with the first limiting plate 311. The barb 312 protrudes from the side of the first limiting plate 311 facing the first elastic unit 10. The end of the barb 312 away from the first limiting plate 311 points to the second limiting portion 32, which may further enhance the buckling force of the first limiting plate 311, thereby preventing the vehicle brake friction pad return power mechanism from being separated from the brake caliper bracket 70. A guide plate 313 is provided at one end of the first limiting plate 311 away from the second limiting portion 32 , so that the vehicle brake friction plate return power mechanism can be assembled more easily.

[0064] In this embodiment, if Figure 2 , Figure 4 As shown, two limiting units 30 may be provided, and the spacing between the two limiting units 30 may gradually increase in the direction away from the second elastic unit 20, so that the two limiting units 30 cooperate to present a V-shape. Since the surface of the brake caliper bracket 70 is a rough surface with low flatness, if a whole limiting unit 30 is used, it cannot ensure that the limiting unit 30 is fully in contact with the rough surface. In this embodiment, two limiting units 30 with a spacing are used to increase the contact area with the brake caliper bracket 70, thereby further preventing the vehicle brake friction pad return power mechanism from separating from the brake caliper bracket 70.

[0065] In this embodiment, if Figure 4 , Figure 5 As shown, a vehicle braking system is disclosed, which may include a vehicle brake friction pad return power mechanism, a friction pad 60 , and a brake caliper bracket 70 .

[0066] The friction plate 60 can slow down or stop the vehicle during driving. This ensures that the vehicle can quickly stop when necessary. Among them, the end of the first elastic unit 10 away from the second elastic unit 20 is fixedly connected to the friction plate 60 by riveting. Exemplarily, the vehicle brake friction plate return power mechanism has four, with two friction plates 60, and each friction plate 60 is distributed with two vehicle-mounted brake friction plate return power mechanisms. Therefore, when the vehicle brake friction plate return power mechanism is subjected to the pulling force from the friction plate 60, the friction plate 60 can be restored to the initial state by the return force of the vehicle brake friction plate return power mechanism.

[0067] Part of the brake caliper bracket 70 is located in the accommodating space. The connection part between the second elastic unit 20 and the limiting unit 30 is pressed against the brake caliper bracket 70. The end of the first limiting portion 31 away from the second elastic unit 20 is pressed against the brake caliper bracket 70. There is a gap between the first elastic unit 10 and the brake caliper bracket 70. The brake caliper bracket 70 can bear the weight of each component, and can make the vehicle brake friction pad return power mechanism and the brake caliper bracket 70 stably connected, which will be more firm and reliable.

[0068] Those skilled in the art will appreciate that the above-mentioned embodiments are specific examples for implementing the present disclosure, and in actual applications, various changes may be made thereto in form and detail without departing from the scope of the present disclosure.

Claims

1. A vehicle brake friction plate return power mechanism, characterized in that: The vehicle brake friction plate return power mechanism comprises: a first elastic unit; the first elastic unit comprises a first elastic segment; the projection of the first elastic segment in the reference plane is wavy; the angle of the bending part of the projection of the first elastic segment in the reference plane is a first angle; the projection of the first elastic segment in the reference plane has a plurality of intersections with a first reference line; the first reference line is located in the reference plane; A second elastic unit; a second angle is formed between the projection of the second elastic unit in the reference plane and a second reference line; the second reference line is located in the reference plane; the second reference line is perpendicular to the first reference line; A limiting unit; the first elastic unit, the second elastic unit and the limiting unit are integrally formed in sequence; the limiting unit comprises a first limiting portion, the first limiting portion and the first elastic unit are arranged opposite to each other; there is a accommodating space between the first limiting portion and the first elastic unit; the connecting portion between the second elastic unit and the limiting unit is convex toward the accommodating space.

2. A vehicle brake friction pad return power mechanism according to claim 1, characterized in that: When the vehicle brake friction plate return power mechanism is in a natural state, the first angle is 25°~35°.

3. A vehicle brake friction pad return power mechanism according to claim 2, characterized in that: The first elastic unit further includes a second elastic section; the second elastic section includes a first transition plate and a second transition plate; the first elastic section, the first transition plate, the second transition plate and the second elastic unit are integrally formed in sequence; the angle between the first transition plate and the second transition plate is a third angle; When the vehicle brake friction plate return power mechanism is in a natural state, the third angle and the first angle satisfy the following formula: （2*α1）＜α3＜75°； Among them, α1 is the first angle, and α3 is the third angle.

4. A vehicle brake friction pad return power mechanism according to claim 2, characterized in that: The first elastic unit also includes a connecting plate; the connecting plate is perpendicular to the reference plane; the end of the first elastic segment away from the second elastic unit is integrally formed with the connecting plate; the angle between the end of the first elastic segment close to the connecting plate and the connecting plate is a fourth angle; when the vehicle brake friction pad return power mechanism is in a natural state, the fourth angle is greater than 160°.

5. The vehicle brake friction pad return power mechanism according to claim 1, characterized in that: The thickness of the second elastic unit is greater than that of the first elastic unit; and the width of the second elastic unit is greater than that of the first elastic unit.

6. A vehicle brake friction pad return power mechanism according to claim 1, characterized in that: The limiting unit further includes a second limiting portion; the first limiting portion, the second limiting portion and the second elastic unit are integrally formed in sequence; the angle between the projection of the first limiting portion in the reference plane and the first reference line is a fifth angle; the angle between the projection of the second limiting portion in the reference plane and the second reference line is a sixth angle; When the vehicle brake friction plate return power mechanism is in a natural state, the fifth angle is 5° to 10°; the fifth angle and the sixth angle satisfy the following formula: α5＜α6＜15°； Among them, α5 is the fifth angle; α6 is the sixth angle.

7. A vehicle brake friction pad return power mechanism according to claim 6, characterized in that: The vehicle brake friction pad return power mechanism is in the projection of the reference plane; the end of the first elastic unit away from the second elastic unit is located on the second reference line; the distance from the connection part of the first elastic unit and the second elastic unit to the second reference line is the first distance; the distance from the connection part of the second elastic unit and the limiting unit to the second reference line is the second distance; the distance from the connection part of the first limiting part and the second limiting part to the second reference line is the third distance; the first distance, the second distance and the third distance satisfy the following formula: L2<L3<(L1*2 / 3); Among them, L1 is the first distance; L2 is the second distance; L3 is the third distance.

8. The vehicle brake friction plate return power mechanism according to claim 7, characterized in that: The sixth angle and the second angle satisfy the following formula: 30°＜α2＜3*α6； Wherein, α2 is the second angle.

9. The vehicle brake friction pad return power mechanism according to claim 6, characterized in that: The first limiting portion includes a first limiting plate and a barb, and one end of the first limiting plate is integrally formed with the second limiting portion; the fifth angle is the angle between the projection of the first limiting plate on the reference plane and the first reference line; the barb is integrally formed with the first limiting plate; the barb protrudes from a side of the first limiting plate facing the first elastic unit; and an end of the barb away from the first limiting plate points to the second limiting portion.

10. The vehicle brake friction pad return power mechanism according to claim 1, characterized in that: Two limiting units are provided, and the distance between the two limiting units gradually increases in a direction away from the second elastic unit.

11. A vehicle braking system, characterized in that: The vehicle braking system comprises: The vehicle brake friction pad return power mechanism according to any one of claims 1 to 10; Friction plate; one end of the first elastic unit away from the second elastic unit is fixedly connected to the friction plate; A brake caliper bracket; a portion of the brake caliper bracket is located in the accommodating space; a connecting portion between the second elastic unit and the limiting unit is pressed against the brake caliper bracket; an end of the first limiting portion away from the second elastic unit is pressed against the brake caliper bracket; and a gap is provided between the first elastic unit and the brake caliper bracket.

Images