Parking braking system and vehicle

Abstract

The parking braking system comprises a braking device and a parking device, the braking device comprises a caliper body, a braking motor, a lead screw, a piston and a brake caliper assembly, the braking motor is connected to the caliper body and is in transmission connection with the lead screw, the piston is in threaded connection with the lead screw and is connected to the caliper body in a sliding mode in the axial direction of the lead screw, and the brake caliper assembly is arranged on the caliper body. The piston can move between a braking position and a separating position in the axial direction of the lead screw, the brake caliper assembly is connected to the end of the piston, and the piston is provided with an abutting face opposite to the brake caliper assembly. The parking device comprises a parking driving piece connected to the caliper body and a parking plug connected to the output end of the parking driving piece, and the parking driving piece can drive the parking plug to move and abut against the abutting face when the piston is located at the braking position. The position of the piston is kept fixed through abutting of the parking plug, so that the control precision of the brake caliper assembly is improved, meanwhile, the axial length of the brake caliper assembly is not increased, and the arrangement space in a vehicle is saved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to vehicle brake control system technical field, especially related to a parking brake device and vehicle. BACKGROUND

[0002] Electro-Mechanical Brake (EMB) system needs to ensure that the braking force is fast and accurate during driving brake process, and the EMB structure needs to adopt a mechanical structure with high transmission efficiency, so the self-locking structure with low transmission efficiency cannot be adopted, so the parking function requirement when the vehicle stops cannot be realized, and a parking device needs to be installed on the EMB.

[0003] At present, most of the parking devices on the EMB adopt ratchet and pawl structure or radial ratchet meshing parking structure, and these two structures have common problems, for example, the number of ratchet teeth limits the control accuracy, for example, if the number of ratchet teeth is 12, the parking can only be performed at the position of every 30° central angle of the ratchet shaft, and parking cannot be completed at other angles, and the above parking devices will increase the axial length of the EMB brake caliper assembly to different degrees, causing arrangement difficulty. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a parking brake system and vehicle, and aims at solving the technical problems of low control accuracy of the existing parking device and increase of the axial length of the brake caliper assembly.

[0005] In order to achieve the above-mentioned purpose, the technical scheme adopted by the utility model is as follows:

[0006] In the first aspect, a parking brake system is provided, which comprises:

[0007] A brake device comprises a caliper body, a brake motor, a lead screw, a piston and a brake caliper assembly, the brake motor is connected to the caliper body and is drivingly connected to the lead screw, the piston is screwed to the lead screw and is axially slidably connected to the caliper body along the lead screw, the brake motor can drive the lead screw to rotate, so that the piston moves axially between a brake position and a separation position along the lead screw, the brake caliper assembly is connected to the end of the piston, and the piston has an abutting surface facing away from the brake caliper assembly.

[0008] A parking device comprises a parking drive connected to the caliper body and a parking plug connected to the output end of the parking drive, the parking drive can drive the parking plug to move and abut against the abutting surface when the piston is in the brake position.

[0009] As one of the possible implementation manners of the first aspect, a stepped structure is formed on the circumferential surface of the piston, and the abutting surface forms the table surface of the stepped structure.

[0010] As a possible implementation form of the first aspect, the piston comprises an inner ring portion and an outer ring portion connected to the inner ring portion, the inner ring portion is screwed to the screw rod, the outer ring portion is connected to the caliper assembly, an outer ring surface of the outer ring portion protrudes from an outer ring surface of the inner ring portion, and the abutting surface is in contact with the outer ring surface of the outer ring portion and the outer ring surface of the inner ring portion.

[0011] As a possible implementation form of the first aspect, the parking drive member is capable of driving the parking plug to move along the screw rod in the axial direction, the parking plug has a limiting surface facing the caliper assembly, and the limiting surface and the abutting surface are at least partially staggered in the axial direction of the screw rod.

[0012] As a possible implementation form of the first aspect, the parking drive member comprises a parking motor and a threaded shaft connected to an output end of the parking motor, the parking plug is screwed to the threaded shaft and is slidably connected to the caliper body in the axial direction of the threaded shaft.

[0013] As a possible implementation form of the first aspect, the caliper body is provided with a rotation-stopping pin, a rotation-stopping groove extending in the axial direction of the threaded shaft is formed in a circumferential surface of the parking plug, and the rotation-stopping pin is slidably connected to the rotation-stopping groove.

[0014] As a possible implementation form of the first aspect, the caliper body comprises a mounting cavity, the piston and the parking plug are arranged in the mounting cavity, a first mounting hole and a second mounting hole are formed in a cavity wall of the mounting cavity, the screw rod passes through the first mounting hole, and the threaded shaft passes through the second mounting hole.

[0015] As a possible implementation form of the first aspect, the threaded shaft is rotatably connected to the second mounting hole through a parking bearing.

[0016] As a possible implementation form of the first aspect, the parking motor is at least partially accommodated in the second mounting hole, and the parking device further comprises a sealing ring sealingly connected between the parking motor and a hole wall of the second mounting hole.

[0017] In a second aspect, a vehicle is provided, comprising the parking brake system provided in the above embodiments.

[0018] The technical effect of the utility model relative to prior art is: when the piston is in the brake position, the brake caliper assembly clamps the wheel hub of the wheel, because the abutting face is away from the brake caliper assembly, therefore the parking plug is abutted on the abutting face, can play the axial location function to the piston, to make the brake caliper assembly keep clamping the wheel hub of the wheel, thereby making the wheel keep the brake state, realizes parking. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical scheme of the utility model embodiment, the following will be to the utility model embodiment or prior art description needed to use the drawing briefly introduced, obviously, the following described drawing only some embodiments of the utility model, for the person skilled in the art comes, under the premise of not paying the creative labor, can also obtain other drawings according to these drawings.

[0020] Figure 1 It is the perspective view of the parking brake system of the utility model embodiment;

[0021] Figure 2 It is Figure 1 The sectional view of the parking brake system in A-A in

[0022] Figure 3 It is Figure 1 The sectional view of the parking brake system in B-B in

[0023] BRIEF DESCRIPTION OF DRAWINGS

[0024] 10, brake device;11, caliper body;111, gear assembly;112, motor housing;113, rotation stopping pin;101, installation cavity;1011, first installation hole;1012, second installation hole;1013, opening;102, connecting cavity;103, transmission cavity;104, rotation stopping hole;12, brake motor;13, screw rod;14, piston;140, abutting face;141, inner ring part;142, outer ring part;15, brake caliper assembly;161, flange bearing seat;162, intermediate bearing;163, pressure sensor;17, sealing structure;18, dust cover;191, caliper frame;192, guide pin;20, parking device;21, parking driving part;211, parking motor;212, threaded shaft;22, parking plug;220, limiting face;221, rotation stopping groove;23, sealing ring. DETAILED DESCRIPTION

[0025] The embodiments of the present application are described below in detail, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary, and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0026] In the description of the present application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0027] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise explicitly specified.

[0028] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0029] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application is further described in detail below with reference to the drawings and examples.

[0030] The embodiment of the present application provides a parking brake system and a vehicle, the vehicle comprising a vehicle body and the parking brake system, the parking brake system being installed at a wheel of the vehicle body and being used for braking and parking the wheel.

[0031] Please refer to Figure 1 and Figure 2 The parking brake system comprises a brake device 10 and a parking device 20.

[0032] The braking device 10 includes a caliper body 11, a brake drive component, a piston 14, and a brake caliper assembly 15.

[0033] The clamp body 11 is connected to the vehicle body. The brake drive component may include a brake motor 12 and a lead screw 13. The brake drive component is connected to the clamp body, specifically, it is connected to the clamp body 11 at least through the brake motor 12 and is driven to the lead screw 13. The drive connection may be achieved through a gear assembly 111.

[0034] The piston 14 is driven to the lead screw 13 and slidably connected to the clamp body 11 along the axial direction of the lead screw 13. The clamp body 11 restricts the rotation of the piston 14. The transmission connection between the piston 14 and the lead screw 13 can be a screw connection or a ball screw connection. In this case, the lead screw 13 can be a ball screw pair. The brake motor 12 can drive the lead screw 13 to rotate, so that the piston 14 can move between the braking position and the disengaged position along the axial direction of the lead screw 13.

[0035] The piston 14 has two ends along the axial direction of the lead screw 13, one end close to the wheel and the other end away from the wheel. The brake caliper assembly 15 is connected to the end of the piston 14, specifically the end of the piston 14 close to the wheel. When the piston 14 is in the braking position, the brake caliper assembly 15 can clamp the wheel hub to brake the wheel. When the piston 14 is in the disengaged position, the brake caliper assembly 15 is separated from the wheel hub in the roadway to release the brake on the wheel. Specifically, the brake caliper assembly 15 includes a caliper and brake pads connected to the caliper. The end of the piston 14 is connected to the caliper. When the piston 14 moves toward the braking position, the piston 14 pushes the caliper to move, causing the brake pads to move toward the wheel hub until the piston 14 moves to the braking position, at which point the brake pads abut against the wheel hub.

[0036] The piston 14 has an abutment surface 140 facing away from the brake caliper assembly 15. The abutment surface 140 may be located at the end of the piston 14 away from the wheel or at the axial center of the piston 14.

[0037] The parking device 20 includes a parking drive 21 and a parking plug 22. The parking drive 21 is connected to the clamp body 11, and the parking plug 22 is connected to the output end of the parking drive 21. The parking drive 21 can drive the parking plug 22 to move and abut against the contact surface 140 when the piston 14 is in the braking position.

[0038] When the piston 14 is in the braking position, the brake caliper assembly 15 clamps the wheel hub, and since the abutting surface 140 faces away from the brake caliper assembly 15, the parking plug 22 abuts against the abutting surface 140, thereby axially limiting the piston 14, so that the brake caliper assembly 15 is kept in the state of clamping the wheel hub, thereby keeping the wheel in the braking state, achieving parking. In this way, the piston 14 is fixed in position by the abutting of the parking plug 22, thereby improving the control accuracy of the brake caliper assembly 15, without increasing the axial length of the brake caliper assembly 15, thereby saving the layout space in the vehicle.

[0039] When it is needed to release parking, the parking plug 22 can be retracted first to be separated from the piston 14, and then the piston 14 is retracted to the separation position by reversing the screw rod 13 driven by the brake motor 12. Before the parking plug 22 is retracted, the screw rod 13 can be driven by the brake motor 12 to rotate forward, so as to increase the force applied by the piston 14 to the brake caliper assembly 15, thereby reducing the force applied by the abutting surface 140 to the parking plug 22, so that the parking driving member 21 only needs to have a small power to drive the parking plug 22 to separate from the abutting surface 140, thereby saving energy and improving the reliability of the parking device 20.

[0040] In other embodiments, the brake driving member can be driven by hydraulic pressure, pneumatic pressure or electromagnetic force, which is not limited here, as long as it can drive the piston to move between the braking position and the separation position, and can be stopped at the braking position by the parking plug after power failure.

[0041] Please refer to Figure 2 In some embodiments, the caliper body 11 includes a mounting cavity 101, the piston 14 and the parking plug 22 are arranged in the mounting cavity 101, the cavity wall of the mounting cavity 101 is provided with a first mounting hole 1011 and a second mounting hole 1012 penetrating through, and an opening 1013 opposite to the first mounting hole 1011, the brake caliper assembly 15 is arranged at the opening 1013, and the piston 14 is moved to the braking position by moving towards the opening 1013. The screw rod 13 is arranged in the first mounting hole 1011 and connected with the piston 14, and the parking driving member 21 can pass through the second mounting hole 1012 and be connected with the parking plug 22. In this way, the caliper body 11 makes the brake device 10 and the parking device 20 form an integral whole, facilitating assembly, and achieving the limitation of the parking plug 22. The moving direction of the parking plug 22 can be parallel to the axial direction of the screw rod 13, or can be at an angle to the axial direction of the screw rod 13, the moving path of the parking plug 22 can be a straight line, or can be a broken line or a curve, which is not limited here, as long as it can finally abut against the abutting surface 140.

[0042] Optionally, the sealing structure 17 is arranged between the screw rod 13 and the hole wall of the first mounting hole 1011 to avoid liquid in the mounting cavity 101 from entering the vehicle interior through the first mounting hole 1011, thereby causing short circuit of the brake motor 12 or other electronic devices.

[0043] Optionally, the brake device 10 further comprises a flange bearing seat 161, an intermediate bearing 162 and a pressure sensor 163, which are all arranged in the mounting cavity 101. The flange bearing seat 161 is connected to the end of the screw rod 13 away from the brake caliper assembly 15. The pressure sensor 163 is connected to the cavity wall of the mounting cavity 101 and is close to the first mounting hole 1011. The intermediate bearing 162 is clamped between the flange bearing seat 161 and the pressure sensor 163. When the screw rod 13 rotates, the screw rod 13 drives the flange bearing seat 161 to rotate. The flange bearing seat 161 rotates relative to the pressure sensor 163 through the intermediate bearing 162, and the intermediate bearing 162 can reduce the friction between the flange bearing seat 161 and the pressure sensor 163. The intermediate bearing 162 can be a plain bearing or a needle bearing. When the brake motor 12 drives the screw rod 13 to rotate to move the piston 14 to the brake position, the pressure sensor 163 can detect the reaction force of the wheel on the brake caliper assembly 15, which is the force applied by the brake caliper assembly 15 to the hub of the wheel. In this way, the pressure sensor 163 realizes detection of the force applied by the brake caliper assembly 15 to the hub of the wheel.

[0044] Optionally, the piston 14 is adapted to the mounting cavity 101 and is in clearance fit with the cavity wall at the opening 1013 to block the opening 1013 of the mounting cavity 101. A dust cover 18 is arranged between the piston 14 and the caliper to prevent dust from entering the mounting cavity 101 through the gap between the piston 14 and the cavity wall at the opening 1013.

[0045] Optionally, the caliper body 11 is further connected with a motor housing 112. The motor housing 112 has a connecting cavity 102 and a transmission cavity 103 communicating with the connecting cavity 102. The connecting cavity 102 is located on the side of the caliper body 11 normal to the axis of the mounting cavity 101. The brake motor 12 is installed in the connecting cavity 102. The output shaft of the brake motor 12 is parallel to the axis of the screw rod 13. The gear assembly 111 is arranged in the transmission cavity 103. The brake motor 12 and the screw rod 13 are drivingly connected through the gear assembly 111. In this way, the arrangement of the parking motor 211 does not increase the axial length of the brake device 10, thereby saving space in the vehicle.

[0046] Optionally, the caliper body 11 is further connected with a caliper bracket 191. The caliper bracket 191 is provided with a guide pin 192. The caliper bracket 191 is connected with the wheel through the guide pin 192 to limit the brake caliper assembly 15.

[0047] Optionally, the axis of the first mounting hole 1011 is parallel to the axis of the second mounting hole 1012, and the first mounting hole 1011 and the second mounting hole 1012 are located on the same side of the mounting cavity 101, so that the brake motor 12 and the parking drive 21 can be arranged side by side on the same side of the caliper body 11, thereby saving space.

[0048] Please refer to Figure 2 In some embodiments, the peripheral side of the piston 14 is formed with a stepped structure, and the abutting surface 140 forms the table surface of the stepped structure. In this way, the parking plug 22 can be arranged close to the middle part of the piston 14, thereby reducing the space occupied by the parking device 20 on the caliper body 11 in the axial direction.

[0049] Optionally, the piston 14 comprises an inner ring part 141 and an outer ring part 142 connected to the inner ring part 141, the inner ring part 141 is screwed to the lead screw 13, and the outer ring part 142 is connected to the brake caliper assembly 15. The outer ring surface of the outer ring part 142 protrudes from the outer ring surface of the inner ring part 141, and the abutting surface 140 is connected to the outer ring surface of the outer ring part 142 and the outer ring surface of the inner ring part 141. At this time, the abutting surface 140 and the outer ring surface of the outer ring part 142 jointly form a stepped structure, and the abutting surface 140 is arranged around the inner ring part 141. This structure of the piston 14 is convenient for machining, and the position accuracy of the parking plug 22 is relatively low, which is convenient for achieving the abutting of the parking plug 22 and the abutting surface 140.

[0050] Optionally, the inner ring part 141 is sleeved on the lead screw 13, and the central axis of the outer ring part 142 coincides with the central axis of the inner ring part 141, so that the abutting surface 140 is arranged with the same width along the circumferential direction of the inner ring part 141, thereby facilitating machining.

[0051] Please refer to Figure 2 In some embodiments, the parking drive 21 can drive the parking plug 22 to move axially along the lead screw 13, and the parking plug 22 has a limiting surface 220 facing the brake caliper assembly 15, and the limiting surface 220 and the abutting surface 140 are at least partially staggered in the axial direction of the lead screw 13. In this way, the parking plug 22 can move in the direction facing the brake caliper assembly 15 to abut the limiting surface 220 to the abutting surface 140, thereby reducing the space occupied by the parking plug 22 in the normal direction of the axis of the first mounting hole 1011, and the displacement of the parking plug 22 can be adjusted according to the moving position of the piston 14. When the piston 14 is slightly deformed after long-term use, the parking plug 22 can abut the abutting surface 140 by increasing the displacement. It should be noted that when the piston 14 is in the separated position, the parking plug 22 can be separated from the piston 14 or abut the abutting surface 140, so as to limit the piston 14 when the piston 14 is in the separated position. It is not necessary to arrange a limiting structure for the piston 14 in the caliper body 11, so as to simplify the structure of the brake device 10 and facilitate machining.

[0052] Optionally, the parking drive member 21 comprises a parking motor 211 and a threaded shaft 212 connected to an output end of the parking motor 211, the parking plug 22 is screwed on the threaded shaft 212 and is slidably connected to the jaw body 11 along an axial direction of the threaded shaft 212. The parking motor 211 can drive the threaded shaft 212 to rotate, and the threaded shaft 212 can drive the parking plug 22 to slide along the axial direction of the threaded shaft 212 when the threaded shaft 212 rotates, so as to realize abutting and separating with the abutting surface 140. When the parking plug 22 abuts against the abutting surface 140, the piston 14 applies an axial force to the parking plug 22, and the screwing cooperation between the parking plug 22 and the threaded shaft 212 can make the parking plug 22 realize self-locking through the friction force between the two screw surfaces matched with each other, so as to avoid displacement of the parking plug 22 under a larger force applied by the piston 14, and the parking motor 211 can be directly powered off, without the need of keeping the parking motor 211 in a working state to maintain the position of the parking plug 22, thereby saving energy consumption.

[0053] Please refer to Figure 3 Optionally, the jaw body 11 is provided with a rotation stopping pin 113, and a rotation stopping groove 221 extending along the axial direction of the threaded shaft 212 is formed in a circumferential surface of the parking plug 22, and the rotation stopping pin 113 is slidably connected in the rotation stopping groove 221. In this way, the parking plug 22 is slidably connected with the jaw body 11 through the cooperation between the rotation stopping groove 221 and the rotation stopping pin 113, and the structure is simple and the cost is low.

[0054] Optionally, a rotation stopping hole 104 can be formed in the jaw body 11, the parking plug 22 is screwed on the threaded shaft 212 during assembly, then the slot opening of the rotation stopping groove 221 is opposite to the rotation stopping hole 104, then the rotation stopping pin 113 is inserted into the rotation stopping hole 104 from the outside and extends into the rotation stopping groove 221, so as to realize the cooperation between the rotation stopping pin 113 and the rotation stopping groove 221, thereby facilitating assembly.

[0055] Optionally, the threaded shaft 212 is arranged in the second mounting hole 1012, and the parking motor 211 is mounted outside the mounting cavity 101, so as to avoid occupying the cavity space of the mounting cavity 101.

[0056] Optionally, the threaded shaft 212 is rotatably connected to the second mounting hole 1012 through a parking bearing, so that the threaded shaft 212 can reduce the friction force between the threaded shaft 212 and the hole wall of the second mounting hole 1012 through the parking bearing, and realize axial and radial limiting through the parking bearing.

[0057] Optionally, the parking motor 211 is at least partially accommodated in the second mounting hole 1012, so that the clamp body 11 can limit the parking motor 211 and buffer the shaking of the parking motor 211. Specifically, the second mounting hole 1012 can include an outer hole section and an inner hole section connected in sequence in the axial direction, the inner hole section is close to the mounting cavity 101, the width of the outer hole section is greater than that of the inner hole section, the parking motor 211 is partially accommodated in the outer hole section, the hole wall of the outer hole section abuts against the peripheral side surface of the parking motor 211, and the end surface of the parking motor 211 abuts against the stepped surface between the outer hole section and the inner hole section, so that the outer hole section limits the parking motor 211 in the axial direction and the radial direction, and the parking bearing is clamped in the inner hole section.

[0058] Optionally, the parking device 20 further includes a sealing ring 23 sealingly connected between the parking motor 211 and the hole wall of the second mounting hole 1012. The sealing ring 23 can seal the second mounting hole 1012, so as to avoid that the liquid in the mounting hole enters the inside of the vehicle through the second mounting hole 1012 to cause the short circuit of the parking motor 211 or other electronic devices.

[0059] The above only describes some specific embodiments of the present application, and only specifically describes the technical principles of the present application. These descriptions are only for explaining the principles of the present application, and cannot be explained as the limitation of the protection scope of the present application in any way. Based on the above explanation, any modification, equivalent replacement and improvement within the spirit and principles of the present application, and other specific embodiments of the present application which can be thought by those skilled in the art without creative labor, should be included in the protection scope of the present application.

Claims

1. A parking brake system, characterized in that, include: A braking device includes a caliper body, a brake drive component, a piston, and a brake caliper assembly. The brake drive component includes a brake motor and a lead screw. The brake motor is connected to the caliper body and is driven to the lead screw. The lead screw is driven to the piston. The brake motor can drive the piston to move along its own axis between a braking position and a disengaged position via the lead screw. The brake caliper assembly is connected to the end of the piston. The piston moves from the disengaged position to the braking position by moving toward the brake caliper assembly. The piston has an abutment surface facing away from the brake caliper assembly. A parking device includes a parking drive connected to the clamp body and a parking plug connected to the output end of the parking drive. The parking drive is capable of driving the parking plug to move and abutting against the abutment surface when the piston is in the braking position.

2. The parking brake system as described in claim 1, characterized in that, The piston has a stepped structure on its peripheral side, and the contact surface forms a platform of the stepped structure.

3. The parking brake system as described in claim 2, characterized in that, The piston includes an inner ring portion and an outer ring portion connected to the inner ring portion. The inner ring portion is connected to the brake drive component, and the outer ring portion is connected to the brake caliper assembly. The outer ring surface of the outer ring portion protrudes beyond the outer ring surface of the inner ring portion, and the abutment surface is in contact with both the outer ring surface of the outer ring portion and the outer ring surface of the inner ring portion.

4. The parking brake system as described in claim 1, characterized in that, The piston is screwed to the lead screw and slidably connected to the caliper body along its own axial direction. The brake motor can drive the lead screw to rotate so that the piston can move along the lead screw axial direction between the braking position and the disengaged position. The parking drive can drive the parking plug to move along the lead screw axial direction. The parking plug has a limiting surface facing the brake caliper assembly. The limiting surface and the abutment surface at least partially intersect in the lead screw axial direction.

5. The parking brake system as described in claim 4, characterized in that, The parking drive unit includes a parking motor and a threaded shaft connected to the output end of the parking motor. The parking plug is screwed to the threaded shaft and slidably connected to the clamp body along the axial direction of the threaded shaft.

6. The parking brake system as described in claim 5, characterized in that, The clamp body is provided with an anti-rotation pin, and the peripheral side of the parking plug is provided with an anti-rotation groove extending axially along the threaded shaft. The anti-rotation pin is slidably connected to the anti-rotation groove.

7. The parking brake system as described in claim 5, characterized in that, The clamp body includes a mounting cavity, in which the piston and the parking plug are both disposed. The cavity wall of the mounting cavity has a through first mounting hole and a second mounting hole. The lead screw passes through the first mounting hole, and the threaded shaft passes through the second mounting hole.

8. The parking brake system as described in claim 7, characterized in that, The threaded shaft is rotatably connected to the second mounting hole via a parking bearing.

9. The parking brake system as described in claim 7, characterized in that, The parking motor is at least partially housed in the second mounting hole, and the parking device further includes a sealing ring that seals between the parking motor and the wall of the second mounting hole.

10. A vehicle, characterized in that, Includes the parking brake system as described in any one of claims 1 to 9.

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