Parking mechanism for braking system and braking system

Abstract

The utility model discloses a parking mechanism for a braking system and the braking system, and belongs to the technical field of braking systems. According to the parking mechanism for the braking system and the braking system, the linear driver drives the first braking piece to move in the axial direction of the parking wheel, and the parking pin can abut against the second guide face; when unloading torque acts on the driving wheel, the parking pin rotates along with the parking wheel and moves on the second guide face, so that the second braking piece gets close to the first braking piece in the axial direction of the parking wheel, the first braking part abuts against the second braking part, friction force is generated, and parking is achieved. When secondary pressurization is needed, the rotary driver works, the parking pin rotates along with the parking wheel so that the parking pin can be separated from the second guide face, then the second braking piece can be far away from the first braking piece in the axial direction of the parking wheel under the action of the elastic piece, friction force is eliminated, and secondary pressurization is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of brake systems, in particular to a parking mechanism for a brake system and a brake system. Background Art

[0002] As the degree of electrification of automobile chassis continues to deepen, the demand for intelligent control of automobile chassis braking is getting higher and higher. At present, the execution structure of chassis brake wheel end is still mainly based on traditional brake calipers, such as the commonly used electronic parking brake system (EPB) on the market, which generates braking force through hydraulic transmission.

[0003] Since the traditional brake caliper itself cannot generate braking force and cannot autonomously control the clamping and release of the braking force, it cannot meet the needs of intelligent control, so the electronic mechanical brake system (Electromechanical brake, referred to as EMB) came into being.

[0004] The traditional EPB parking mechanism is realized by the self-locking function of the transmission mechanism, such as the self-locking of the screw, or the self-locking of the worm gear, etc. However, for EMB, the transmission mechanism needs to perform the function of driving brake and cannot have a self-locking function, otherwise it will not be able to return to the position normally when it fails. Therefore, a separate parking mechanism needs to be set to achieve parking. In the prior art, there is no parking mechanism specifically used for EMB, which is not convenient for the promotion and application of EMB. Utility Model Content

[0005] The utility model aims to provide a parking mechanism and a braking system for a braking system, which can not only ensure the stability of parking but also realize secondary pressurization when parking.

[0006] In order to achieve the above objectives, the following technical solutions are provided:

[0007] On the one hand, a parking mechanism for a braking system is provided, the braking system comprising a rotary driver, a driving wheel, a transmission mechanism and a brake pad, the rotary driver being used to provide a loading torque to the driving wheel, so that the driving wheel can drive the brake pad to move through the transmission mechanism under the action of the loading torque to generate a braking force, and the brake pad can cause the driving wheel to generate an unloading torque through the transmission mechanism; the parking mechanism for the braking system comprises:

[0008] a parking wheel, the parking wheel being used to be connected to the driving wheel and capable of rotating with the driving wheel, the parking wheel being provided with a parking pin;

[0009] a first brake member, the first brake member being mounted on a housing of the brake system in a manner of being restricted from rotating in a circumferential direction of the parking wheel, the first brake member being provided with a first brake portion;

[0010] a second brake member and an elastic member, wherein the first brake member and the parking wheel are respectively located on both sides of the second brake member along the axial direction of the parking wheel; the elastic member is sandwiched between the first brake member and the second brake member; the second brake member is provided with a second braking portion and a second guide surface, the second braking portion being used to abut against the first braking portion and generate friction; when the unloading torque acts on the driving wheel, the parking pin can rotate with the parking wheel and move on the second guide surface, so that the second brake member can approach the first brake member along the axial direction of the parking wheel; when the loading torque acts on the driving wheel, the parking pin can rotate with the parking wheel, so that the parking pin can be separated from the second guide surface;

[0011] A linear drive is used to drive the first brake member to move along the axial direction of the parking wheel so that the parking pin can abut against or separate from the second guide surface.

[0012] As an optional solution for the parking mechanism of the braking system, the second guide surface is a second inclined surface provided on the side of the second braking member facing the parking wheel.

[0013] As an optional solution for the parking mechanism of the brake system, a plurality of second guide surfaces are provided, and the plurality of second guide surfaces are arranged at intervals along the circumferential direction of the parking wheel.

[0014] As an optional solution for the parking mechanism of the braking system, the first braking member is further provided with a mounting plug-in structure, the housing of the braking system is provided with a mounting plug-in matching structure, the mounting plug-in structure can be plugged with the mounting plug-in matching structure along the axial direction of the parking wheel to limit the first braking member from rotating relative to the housing of the braking system; and / or,

[0015] The first braking part comprises a plurality of first friction plates, the first braking member is provided with a first plug-in structure, the plurality of first friction plates are provided with a first plug-in matching structure, the first plug-in structure can be plugged with the first plug-in matching structure along the axial direction of the parking wheel to limit the plurality of first friction plates from rotating relative to the first braking member; and / or,

[0016] The second braking part includes a plurality of second friction plates, the second braking member is provided with a second plug-in structure, and the plurality of second friction plates are each provided with a second plug-in matching structure, and the second plug-in structure can be plugged with the second plug-in matching structure along the axial direction of the parking wheel to limit the rotation of the plurality of second friction plates relative to the second braking member.

[0017] As an optional solution for the parking mechanism of the brake system, one of the first plug-in structure and the first plug-in mating structure is a first internal spline, and the other is a first external spline;

[0018] One of the second plug-in structure and the second plug-in mating structure is a second internal spline, and the other is a second external spline;

[0019] One of the installation plug-in structure and the installation plug-in matching structure is a third internal spline, and the other is a third external spline.

[0020] As an optional solution for a parking mechanism of a brake system, the first brake member is provided with a first guide surface;

[0021] The linear drive includes a translation drive member and a sliding member, wherein the translation drive member is used to drive the sliding member to translate radially along the parking wheel, and one end of the translation drive member is slidingly connected to the first guide surface to drive the first brake member to move axially along the parking wheel.

[0022] As an optional solution for the parking mechanism of the braking system, the translation driving member is an electromagnet, the sliding member is magnetic and can translate in the radial direction of the parking wheel under the magnetic force of the electromagnet.

[0023] As an optional solution for the parking mechanism of the braking system, the first guide surface is a first inclined surface provided on a side of the first braking member facing away from the second braking member.

[0024] As an optional solution for the parking mechanism of the brake system, both the driving wheel and the parking wheel are gears, and the driving wheel is meshed with the parking wheel.

[0025] On the other hand, a braking system is provided, comprising a rotary drive, a driving wheel, a transmission mechanism, a brake pad and a parking mechanism for a braking system as described in any one of the above items, wherein the rotary drive is used to provide a loading torque to the driving wheel so that the driving wheel can drive the brake pad to move through the transmission mechanism to generate a braking force, the brake pad can cause the driving wheel to generate an unloading torque through the transmission mechanism, and the parking wheel is used to be connected to the driving wheel and can rotate with the driving wheel.

[0026] Compared with the prior art, the utility model has the following beneficial effects:

[0027] The parking mechanism and braking system of the utility model for a braking system can drive the first brake member to move along the axial direction of the parking wheel through a linear driver, so that the parking pin can abut against the second guide surface; when the unloading torque acts on the driving wheel, the parking pin can rotate with the parking wheel and move on the second guide surface, so that the second brake member is close to the first brake member along the axial direction of the parking wheel, thereby causing the first brake part to abut against the second brake part and generate friction to achieve parking, and the parking mechanism for the braking system can achieve self-locking through the unloading torque, which is conducive to ensuring parking stability; when secondary pressurization is required, the rotary driver is operated, and the parking pin can rotate with the parking wheel, so that the parking pin is separated from the second guide surface, thereby causing the second brake member to be able to move away from the first brake member along the axial direction of the parking wheel under the action of the elastic member, thereby eliminating friction and achieving secondary pressurization. When it is necessary to release the parking, the first brake member is driven by the linear driver to move along the axial direction of the parking wheel, and the parking pin is separated from the second guide surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of the structure of the braking system in the embodiment of the utility model;

[0029] Figure 2 An exploded view of a braking system in an embodiment of the utility model;

[0030] Figure 3 This is a schematic diagram of the structure of a parking mechanism for a braking system in an embodiment of the utility model;

[0031] Figure 4 A cross-sectional view of a parking mechanism for a braking system in an embodiment of the utility model;

[0032] Figure 5 This is a schematic structural diagram of a parking wheel in an embodiment of the utility model;

[0033] Figure 6 It is a schematic structural diagram of the second brake member in the embodiment of the utility model.

[0034] Reference numerals:

[0035] 1. Rotary driver; 11. Rotary driving member; 12. Transmission gear;

[0036] 2. Driving wheel;

[0037] 3. Linear drive; 31. Double holding electromagnet; 32. Movable iron core; 321. Third inclined plane;

[0038] 4. first brake member; 41. first friction plate; 42. first internal spline; 43. third external spline; 44. inclined surface groove; 441. first inclined surface;

[0039] 5. Elastic parts;

[0040] 6. second brake member; 61. second friction plate; 62. boss; 621. second inclined surface; 622. groove; 63. second external spline;

[0041] 7. Parking wheel; 71. Parking pin. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0043] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0045] In the description of the present utility model, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use. They are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0046] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0048] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0049] like Figure 1-2 As shown, this embodiment provides a parking mechanism and a braking system for a braking system, the braking system includes a rotary driver 1, a driving wheel 2, a transmission mechanism, a brake pad and a parking mechanism for the braking system, the rotary driver 1 is used to provide a loading torque to the driving wheel 2, so that the driving wheel 2 can drive the brake pad to move through the transmission mechanism to generate a braking force; the brake pad can generate an unloading torque for the driving wheel 2 through the transmission mechanism, in other words, the transmission mechanism can convert the rotational motion of the driving wheel 2 into the linear motion of the brake pad, and can also convert the linear motion of the brake pad into the rotational motion of the driving wheel 2; illustratively, the transmission mechanism is a ball screw mechanism. It should be noted that the structure and matching relationship of the driving wheel 2, the transmission mechanism and the brake pad are prior art and will not be repeated here.

[0050] like Figure 2-6As shown, the parking mechanism for the braking system includes a linear actuator 3, a first brake member 4, an elastic member 5, a second brake member 6 and a parking wheel 7. The parking wheel 7 is used to be connected to the driving wheel 2 and can rotate with the driving wheel 2. The parking wheel 7 is provided with a parking pin 71; the first brake member 4 is mounted on the housing of the braking system in a manner of being restricted from rotating along the circumferential direction of the parking wheel 7, and the first brake member 4 is provided with a first braking portion; the first brake member 4 and the parking wheel 7 are respectively located on both sides of the second brake member 6 along the axial direction of the parking wheel 7; the elastic member 5 is sandwiched between the first brake member 4 and the second brake member 6; the second brake member 6 is provided with A second braking portion and a second guide surface, the second braking portion is used to abut against the first braking portion and generate friction; when the unloading torque acts on the driving wheel 2, the parking pin 71 can rotate with the parking wheel 7 and move on the second guide surface, so that the second braking member 6 can approach the first braking member 4 along the axial direction of the parking wheel 7; when the loading torque acts on the driving wheel 2, the parking pin 71 can rotate with the parking wheel 7, so that the parking pin 71 can be separated from the second guide surface; the linear drive 3 is used to drive the first braking member 4 to move along the axial direction of the parking wheel 7, so that the parking pin 71 can abut against or separate from the second guide surface.

[0051] The parking mechanism for the braking system of this embodiment drives the first brake member 4 to move along the axial direction of the parking wheel 7 through the linear driver 3, so that the parking pin 71 can abut against the second guide surface; when the unloading torque acts on the driving wheel 2, the parking pin 71 can rotate with the parking wheel 7 and move on the second guide surface, so that the second brake member 6 approaches the first brake member 4 along the axial direction of the parking wheel 7, thereby causing the first brake part to abut against the second brake part and generate friction to achieve parking. The parking mechanism for the braking system is self-locked by unloading torque, which is conducive to ensuring parking stability; when secondary pressurization is required, the rotary driver 1 is operated, and the parking pin 71 can rotate with the parking wheel 7, so that the parking pin 71 is separated from the second guide surface, and then the second brake member 6 can be moved away from the first brake member 4 along the axial direction of the parking wheel 7 under the action of the elastic member 5, thereby eliminating friction and achieving secondary pressurization. When the parking needs to be released, the first brake member 4 is driven by the linear driver 3 to move along the axial direction of the parking wheel 7, and the parking pin 71 is separated from the second guide surface.

[0052] It should be noted that when the first brake member 4 and the second brake member 6 are close to each other, the elastic member 5 will be squeezed to cause the elastic member 5 to produce elastic deformation; when the squeezing force on the elastic member 5 is eliminated, the first brake member 4 and the second brake member 6 can move away from each other under the elastic force of the elastic member 5. In this embodiment, the elastic member 5 is a spring, such as a disc spring.

[0053] Optionally, the second guide surface is a second inclined surface 621 provided on the side of the second brake member 6 facing the parking wheel 7. When the parking pin 71 moves upward on the second inclined surface 621, the second inclined surface 621 can be squeezed, so that the second brake member 6 is close to the first brake member 4 along the axial direction of the parking wheel 7; when the parking pin 71 moves downward on the second inclined surface 621, the squeezing force of the parking pin 71 on the second inclined surface 621 can be eliminated, so that the second brake member 6 can be moved away from the first brake member 4 along the axial direction of the parking wheel 7 under the elastic force of the elastic member 5. The structure is simple and easy to implement.

[0054] In other embodiments, the second guide surface may also be an arcuate surface or other structures, as long as the parking pin 71 can rotate with the parking wheel 7 and move on the second guide surface, so that the second brake member 6 can move along the axial direction of the parking wheel 7, which is not limited here.

[0055] Optionally, a plurality of second guide surfaces are provided, and the plurality of second guide surfaces are arranged at intervals along the circumference of the parking wheel 7. With such arrangement, the parking pin 71 can cooperate with any second guide surface to make the second brake member 6 approach or move away from the first brake member 4 along the axial direction of the parking wheel 7, so as to facilitate rapid parking. It should be noted that the number of second guide surfaces can be selected according to the size or specific requirements of the second brake member 6 and the parking wheel 7, for example, two, three, or even more second guide surfaces can be provided, which is not limited here.

[0056] In this embodiment, Figure 2 , Figure 3 and Figure 6 As shown, the second brake member 6 is provided with a plurality of bosses 62 on the side facing the parking wheel 7, and the plurality of bosses 62 are arranged at intervals along the circumference of the parking wheel 7, so that a groove 622 can be formed between two adjacent bosses 62; along the axial direction of the parking wheel 7, one end of the boss 62 is fixedly connected to the second brake member 6, and the end face of the other end is the second inclined surface 621. With such arrangement, when the loading torque acts on the driving wheel 2, the parking pin 71 can rotate with the parking wheel 7 into the groove 622 between two adjacent bosses 62, so that the parking pin 71 is separated from the second guide surface, thereby eliminating the friction between the first braking part and the second braking part.

[0057] Optionally, the first brake member 4 is further provided with a mounting plug-in structure, and the housing of the brake system is provided with a mounting plug-in matching structure, and the mounting plug-in structure can be plugged with the mounting plug-in matching structure along the axial direction of the parking wheel 7 to limit the rotation of the first brake member 4 relative to the housing of the brake system. In this way, the first brake member 4 can be limited to rotate relative to the housing of the brake system, and the axial movement of the first brake member 4 along the parking wheel 7 will not be affected.

[0058] Further, the first braking part includes a plurality of first friction plates 41, the first brake member 4 is provided with a first plug-in structure, and the plurality of first friction plates 41 are provided with a first plug-in matching structure, and the first plug-in structure can be plugged with the first plug-in matching structure along the axial direction of the parking wheel 7 to limit the rotation of the plurality of first friction plates 41 relative to the first brake member 4. Such a configuration can limit the rotation of the plurality of first friction plates 41 relative to the first brake member 4, and will not affect the axial movement of the plurality of first friction plates 41 along the parking wheel 7, and can increase the friction force to ensure the parking stability.

[0059] Further, the second braking part includes a plurality of second friction plates 61, the second brake member 6 is provided with a second plug-in structure, and the plurality of second friction plates 61 are provided with a second plug-in matching structure, and the second plug-in structure can be plugged with the second plug-in matching structure along the axial direction of the parking wheel 7 to limit the rotation of the plurality of second friction plates 61 relative to the second brake member 6. Such a configuration can limit the rotation of the plurality of second friction plates 61 relative to the second brake member 6, and will not affect the axial movement of the plurality of second friction plates 61 along the parking wheel 7, and can increase the friction force to ensure the parking stability.

[0060] Exemplarily, multiple first friction plates 41 and multiple second friction plates 61 are alternately stacked in sequence along the axial direction of the parking wheel 7 to form a friction plate group. The first friction plate 41 is a steel plate, and both ends of the friction plate group are steel plates, which is beneficial to extending the service life of the parking mechanism.

[0061] In this embodiment, the first plug-in structure is the first internal spline 42, and the first plug-in matching structure is the first external spline. Of course, the first plug-in structure can also be the first external spline, and the first plug-in matching structure can also be the first internal spline 42; further, the second plug-in matching structure is the second internal spline, and the second plug-in structure is the second external spline 63. Of course, the second plug-in matching structure can also be the second external spline 63, and the second plug-in structure can be the second internal spline; further, the installation plug-in matching structure is the third internal spline, and the installation plug-in structure is the third external spline 43. Of course, the installation plug-in matching structure can also be the third external spline 43, and the installation plug-in structure can be the third internal spline. Such a configuration has a simple structure, good processability, and is easy to assemble.

[0062] Optionally, the first brake member 4 is provided with a first guide surface; the linear actuator 3 includes a translation driver and a sliding member, the translation driver is used to drive the sliding member to translate along the radial direction of the parking wheel 7, and one end of the translation driver is slidably connected to the first guide surface to drive the first brake member 4 to move along the axial direction of the parking wheel 7. Such a configuration has a simple structure, can also reduce the space occupied by the linear actuator 3, and is easy to layout the entire vehicle.

[0063] Optionally, the translation driving member is an electromagnet, and the sliding member is magnetic and can translate along the radial direction of the parking wheel 7 under the magnetic force of the electromagnet. The sliding member is driven to translate by magnetic force, which has a simple structure and low cost.

[0064] In this embodiment, the linear actuator 3 is a double-holding electromagnet 31, and the sliding member is a movable iron core 32 of the double-holding electromagnet 31. The movable iron core 32 has two working positions, namely, an extended position and a retracted position, that is, the movable iron core 32 can extend the electromagnet and remain in the extended position, and can also retract the electromagnet and remain in the retracted position. In the process of the movable iron core 32 switching from the retracted position to the extended position, the first brake member 4 can be driven to move along the axial direction of the parking wheel 7 toward the parking wheel 7; in the process of the movable iron core 32 switching from the extended position to the retracted position, the first brake member 4 can be driven to move along the axial direction of the parking wheel 7 toward the parking wheel 7 and reset.

[0065] Optionally, the first guide surface is a first inclined surface 441 provided on the side of the first brake member 4 away from the second brake member 6. When one end of the sliding member moves upward on the first inclined surface 441, the first inclined surface 441 can be squeezed, thereby causing the first brake member 4 to move in a direction close to the parking wheel 7 along the axial direction of the parking wheel 7; when one end of the sliding member moves downward on the first inclined surface 441, the first brake member 4 can be driven to move in a direction away from the parking wheel 7 along the axial direction of the parking wheel 7. The structure is simple and easy to implement.

[0066] In this embodiment, the axial direction of the parking wheel 7 is perpendicular to the horizontal direction, and one end of the sliding member abuts against the first inclined surface 441. When one end of the sliding member slides upward on the first inclined surface 441, the first inclined surface 441 can be pressed to move the first brake member 4 upward; when one end of the sliding member slides downward on the first inclined surface 441, the first brake member 4 can move downward and reset under the action of gravity.

[0067] Furthermore, the first brake member 4 is provided with a bevel groove 44 , and the first bevel 441 is the bottom wall of the bevel groove 44 , and the side wall of the bevel groove 44 can limit the sliding member to prevent the sliding member from slipping off the first bevel 441 .

[0068] Furthermore, the movable iron core 32 is provided with a third inclined surface 321 matched with the first inclined surface 441 , so that the third inclined surface 321 abuts against the first inclined surface 441 , thereby improving the smoothness of the sliding of the movable iron core 32 on the first inclined surface 441 .

[0069] In other embodiments, the first guide surface may also be an arcuate surface or other structures, as long as the first brake member 4 can move axially along the parking wheel 7 when one end of the translation drive member slides on the first guide surface, and no limitation is made here.

[0070] Optionally, the driving wheel 2 is a gear and the parking wheel 7 is a gear, and the driving wheel 2 is meshed with the parking wheel 7; further, the rotary driver 1 includes a rotary driving member 11 and a transmission gear 12, the parking wheel 7 is meshed with the transmission gear 12, and the transmission gear 12 is connected to the output shaft of the rotary driving member 11. Such a configuration has a simple structure, good processability, and is easy to assemble.

[0071] Exemplarily, the working principle of the parking mechanism for the braking system of this embodiment is:

[0072] When parking is required, the electromagnet is powered off and the sliding member extends to drive the first brake member 4 to move along the axial direction of the parking wheel 7 toward the parking wheel 7, so that the parking pin 71 is located in the groove 622. The rotary driver 1 provides a loading torque to the driving wheel 2, thereby driving the parking wheel 7 to rotate, so that the parking pin 71 is separated from the second inclined surface 621 and no friction is generated; when the preset parking force is reached, the rotary driver 1 is turned off, and the parking wheel 7 begins to bear the unloading torque, thereby driving the parking pin 71 to move upward on the second inclined surface 621 and squeeze the second brake member 6, and the second brake member 6 approaches the first brake member 4 along the axial direction of the parking wheel 7, thereby squeezing the elastic member 5 and causing the elastic member 5 to produce elastic deformation, and at the same time pressing the friction plate group, and the friction plate group is compressed to produce sufficient friction to lock the parking mechanism, thereby achieving parking.

[0073] When secondary pressurization is needed, the rotary driver 1 again provides a loading torque to the driving wheel 2, thereby driving the parking wheel 7 to rotate, so that the parking pin 71 is separated from the second inclined surface 621, and the second brake member 6 can be moved away from the first brake member 4 along the axial direction of the parking wheel 7 under the elastic force of the elastic member 5, thereby eliminating the friction force generated by the friction plate group and achieving secondary pressurization.

[0074] When the parking position needs to be released, the electromagnet is energized, the sliding member is retracted, and the first brake member 4 moves away from the parking wheel 7 along the axial direction of the parking wheel 7 and resets, so that the parking pin 71 is disengaged from the groove 622 .

[0075] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention is described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A parking mechanism for a braking system, the braking system comprising a rotary drive (1), a driving wheel (2), a transmission mechanism and a brake pad, the rotary drive (1) being used to provide a loading torque to the driving wheel (2), so that the driving wheel (2) can drive the brake pad to move through the transmission mechanism under the action of the loading torque to generate a braking force, and the brake pad can cause the driving wheel (2) to generate an unloading torque through the transmission mechanism; characterized in that: The parking mechanism for the braking system comprises: a parking wheel (7), the parking wheel (7) being used to be connected to the driving wheel (2) and capable of rotating along with the driving wheel (2), the parking wheel (7) being provided with a parking pin (71); A first brake member (4), the first brake member (4) being mounted on a housing of the brake system in a manner that the first brake member (4) is restricted from rotating in a circumferential direction of the parking wheel (7), and the first brake member (4) is provided with a first brake portion; a second brake member (6) and an elastic member (5), wherein the first brake member (4) and the parking wheel (7) are respectively located on both sides of the second brake member (6) along the axial direction of the parking wheel (7); the elastic member (5) is sandwiched between the first brake member (4) and the second brake member (6); the second brake member (6) is provided with a second brake portion and a second guide surface, the second brake portion being used to abut against the first brake portion and generate friction; when the unloading torque acts on the driving wheel (2), the parking pin (71) can rotate with the parking wheel (7) and move on the second guide surface, so that the second brake member (6) can approach the first brake member (4) along the axial direction of the parking wheel (7); when the loading torque acts on the driving wheel (2), the parking pin (71) can rotate with the parking wheel (7), so that the parking pin (71) can be separated from the second guide surface; A linear drive (3) is used to drive the first brake member (4) to move axially along the parking wheel (7) so that the parking pin (71) can abut against or separate from the second guide surface.

2. The parking mechanism for a braking system according to claim 1, characterized in that: The second guide surface is a second inclined surface (621) provided on the side of the second brake member (6) facing the parking wheel (7).

3. The parking mechanism for a braking system according to claim 1, characterized in that: A plurality of the second guide surfaces are provided, and the plurality of the second guide surfaces are arranged at intervals along the circumference of the parking wheel (7).

4. The parking mechanism for a braking system according to claim 1, characterized in that: The first brake member (4) is further provided with a mounting plug-in structure, the housing of the brake system is provided with a mounting plug-in matching structure, the mounting plug-in structure can be plugged with the mounting plug-in matching structure along the axial direction of the parking wheel (7) to limit the first brake member (4) from rotating relative to the housing of the brake system; and / or, The first braking part comprises a plurality of first friction plates (41), the first braking member (4) is provided with a first plug-in structure, the plurality of first friction plates (41) are all provided with a first plug-in matching structure, the first plug-in structure can be plugged with the first plug-in matching structure along the axial direction of the parking wheel (7) to limit the plurality of first friction plates (41) from rotating relative to the first braking member (4); and / or, The second braking portion comprises a plurality of second friction plates (61), the second braking member (6) is provided with a second plug-in structure, the plurality of second friction plates (61) are each provided with a second plug-in matching structure, the second plug-in structure being capable of plugging with the second plug-in matching structure along the axial direction of the parking wheel (7) to limit the plurality of second friction plates (61) from rotating relative to the second braking member (6).

5. The parking mechanism for a braking system according to claim 4, characterized in that: One of the first plug-in structure and the first plug-in mating structure is a first internal spline (42), and the other is a first external spline; One of the second plug-in structure and the second plug-in mating structure is a second internal spline, and the other is a second external spline (63); One of the installation plug-in structure and the installation plug-in matching structure is a third internal spline, and the other is a third external spline (43).

6. The parking mechanism for a braking system according to claim 1, characterized in that: The first brake member (4) is provided with a first guide surface; The linear drive (3) comprises a translation drive member and a sliding member, wherein the translation drive member is used to drive the sliding member to translate radially along the parking wheel (7), and one end of the translation drive member is slidably connected to the first guide surface to drive the first brake member (4) to move axially along the parking wheel (7).

7. The parking mechanism for a braking system according to claim 6, characterized in that: The translation driving member is an electromagnet, the sliding member is magnetic and can translate in the radial direction of the parking wheel (7) under the action of the magnetic force of the electromagnet.

8. The parking mechanism for a braking system according to claim 6, characterized in that: The first guide surface is a first inclined surface (441) provided on a side of the first braking component (4) facing away from the second braking component (6).

9. The parking mechanism for a braking system according to claim 1, characterized in that: The driving wheel (2) and the parking wheel (7) are both gears, and the driving wheel (2) is meshed with the parking wheel (7).

10. A braking system, characterized in that: The invention comprises a rotary drive (1), a driving wheel (2), a transmission mechanism, a brake pad and a parking mechanism for a braking system as claimed in any one of claims 1 to 9, wherein the rotary drive (1) is used to provide a loading torque to the driving wheel (2), so that the driving wheel (2) can drive the brake pad to move through the transmission mechanism to generate a braking force, and the brake pad can cause the driving wheel (2) to generate an unloading torque through the transmission mechanism, and the parking wheel (7) is used to be connected to the driving wheel (2) and can rotate with the driving wheel (2).

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