Parking device, braking system and vehicle

Abstract

The application discloses a parking device, a brake system and a vehicle. The parking device comprises a brake power device, a ratchet wheel, a pawl and an electromagnet. The brake power device comprises an output shaft. The ratchet wheel is in transmission connection with the output shaft. The electromagnet comprises a rotatable rotating shaft. The pawl is installed on the rotating shaft. The electromagnet is used for driving the pawl to lock the ratchet wheel, so as to limit the rotation of the output shaft. According to the parking device, the rotating electromagnet is used for driving the pawl to lock the ratchet wheel, so as to lock the output shaft and realize parking. The cost is reduced and the occupied space is saved.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, and more specifically, to a parking device, a braking system, and a vehicle. Background Technology

[0002] In related technologies, parking devices include braking power devices, which are used to drive brake pads to brake the brake discs to limit wheel rotation and achieve parking. When it is necessary to maintain the parking state, a parking motor is often used to lock the output shaft of the braking power device through a complex transmission structure to achieve parking. However, the parking motor and transmission structure are expensive and occupy a large space. Utility Model Content

[0003] This application aims to at least partially solve one of the aforementioned technical problems in the prior art. To this end, this application proposes a parking device with a simple structure.

[0004] This application also proposes a braking system having the above-mentioned parking device.

[0005] This application also proposes a vehicle having the above-described parking device or braking system.

[0006] The parking device according to an embodiment of this application includes: a braking power device, a ratchet, a pawl, and an electromagnet. The braking power device includes an output shaft, the ratchet is throttle-connected to the output shaft, the electromagnet includes a rotatable shaft, the pawl is mounted on the shaft, and the electromagnet is used to drive the pawl to lock the ratchet, thereby limiting the rotation of the output shaft.

[0007] According to the parking device of the present application embodiment, a rotary electromagnet is used to drive the pawl to lock the ratchet, thereby locking the output shaft and realizing parking, which helps to reduce costs and save space.

[0008] According to some embodiments of this application, when the rotating shaft drives the pawl to rotate in a first direction, the pawl can lock the ratchet; when the rotating shaft drives the pawl to rotate in a second direction, the pawl can separate from the ratchet. The first direction and the second direction are opposite directions.

[0009] According to some embodiments of this application, the electromagnet further includes: a permanent magnet, a first coil, and a second coil. The rotating shaft is connected to the permanent magnet, and the permanent magnet is located between the first coil and the second coil. When a positive current is passed through the first coil and the second coil, the first coil and the second coil drive the permanent magnet to rotate in the first direction. When a reverse current is passed through the first coil and the second coil, the first coil and the second coil drive the permanent magnet to rotate in the second direction. When the permanent magnet rotates, it drives the rotating shaft to rotate.

[0010] According to some embodiments of this application, the winding directions of the first coil and the second coil are opposite.

[0011] According to some embodiments of this application, the ratchet is disposed on the output shaft.

[0012] According to some embodiments of this application, the parking device further includes a transmission mechanism, brake pads, and a brake disc. The transmission mechanism is connected to the output shaft, and the braking power device is used to drive the brake pads to brake the brake disc through the transmission mechanism to limit wheel rotation.

[0013] According to some embodiments of this application, the transmission mechanism includes a lead screw and a nut, the nut being threadedly engaged with the lead screw, and the output shaft being adapted to drive the lead screw to rotate when rotating, so that the nut moves along the axial direction of the lead screw. When the nut moves, it is adapted to drive the brake pad to move so that the brake pad clamps the brake disc.

[0014] According to some embodiments of this application, the transmission mechanism further includes a transmission component, which includes a first wheel and a second wheel. The first wheel is disposed on the output shaft, and the second wheel drives the first wheel. The lead screw drives the second wheel, and the second wheel is adapted to drive the lead screw to rotate when it rotates.

[0015] According to some embodiments of this application, the transmission assembly is a belt transmission assembly, where both the second wheel and the first wheel are pulleys, the second wheel and the first wheel are spaced apart, and the belt transmission assembly further includes a belt, through which the second wheel and the first wheel are driven.

[0016] According to some embodiments of this application, the transmission assembly is a gear transmission assembly, wherein both the second wheel and the first wheel are gears.

[0017] According to some embodiments of this application, the diameter of the second wheel is larger than the diameter of the first wheel.

[0018] According to some embodiments of this application, the transmission mechanism further includes a planetary gear assembly, wherein the lead screw and the second wheel are driven by the planetary gear assembly, and the second wheel is adapted to drive the lead screw to rotate through the planetary gear assembly when it rotates.

[0019] According to some embodiments of this application, the parking device further includes a housing, and the planetary gear assembly includes: a sun gear, an internal gear ring, planet gears, and a planet carrier. The sun gear is fixedly connected to the second gear, and the rotation of the second gear drives the sun gear to rotate. The internal gear ring is fixed to the housing, and the planet gears are arranged around the sun gear. The planet gears are adapted to mesh simultaneously with the sun gear and the internal gear ring. When the sun gear rotates, it drives the planet gears to move along the internal gear ring. The planet carrier supports the planet gears so that the planet gears can rotate around their axes. The planet carrier is connected to the lead screw, and the movement of the planet gears drives the planet carrier to rotate, so that the planet carrier drives the lead screw to rotate.

[0020] According to some embodiments of this application, the sun gear includes a toothed portion and a shaft, the toothed portion being disposed on the shaft, and the ratchet being disposed on the shaft.

[0021] According to some embodiments of this application, the parking device further includes a clamp body, the brake pad is mounted on the clamp body, and the brake pad is movable relative to the clamp body to move the brake pad closer to or further away from the brake disc.

[0022] According to some embodiments of this application, the parking device further includes a strain gauge and a circuit board. The strain gauge is mounted on the clamp body, and a thrust bearing is provided between the lead screw and the clamp body. One end of the thrust bearing abuts against the lead screw, and the other end abuts against the clamp body. The strain gauge is connected to the circuit board.

[0023] According to some embodiments of this application, the parking device further includes: a clamping member, the clamping member being installed on the clamp body, the strain gauge being located between the clamping member and the clamp body, and the clamping member pressing the strain gauge onto the clamp body.

[0024] According to some embodiments of this application, the parking device further includes a bracket and a clamp body. The bracket is adapted to be mounted on the chassis of a vehicle, the clamp body is mounted on the bracket, the clamp body is slidable relative to the bracket, the brake pad is mounted on the clamp body, and the brake pad is movable relative to the clamp body to bring the brake pad closer to or away from the brake disc.

[0025] According to some embodiments of this application, the parking device further includes a return elastic element, which is mounted on the caliper body and is also connected to the brake pad. The return elastic element is used to apply an elastic force to the brake pad to separate the brake pad from the brake disc.

[0026] According to some embodiments of this application, the braking power device is a brake motor; or, the braking power device includes a brake motor and a reducer, the brake motor being connected to the reducer, and the reducer including the output shaft.

[0027] The braking system according to the second aspect of this application includes the parking device described above.

[0028] According to the braking system of the present application embodiment, the parking device uses a rotary electromagnet to drive the pawl to lock the ratchet, thereby locking the output shaft and realizing parking, which helps to reduce costs and save space.

[0029] The vehicle according to the third aspect of this application includes the parking device or the braking system described above.

[0030] According to the embodiments of this application, the parking device of the vehicle uses a rotary electromagnet to drive the pawl to lock the ratchet, thereby locking the output shaft and realizing parking, which helps to reduce costs and save space.

[0031] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0032] Figure 1 This is a perspective view of a portion of the structure of the parking device according to an embodiment of this application;

[0033] Figure 2 yes Figure 1 A magnified view of a portion of point A in the middle;

[0034] Figure 3 yes Figure 1 A three-dimensional schematic diagram of the structure shown from another perspective;

[0035] Figure 4 yes Figure 1 Front view of the structure shown;

[0036] Figure 5 This is a schematic diagram of an electromagnet's shaft driving a pawl to rotate in the first direction;

[0037] Figure 6 This is a schematic diagram of an electromagnet's shaft driving a pawl to rotate in the second direction;

[0038] Figure 7 This is a schematic diagram of a parking device according to an embodiment of this application, wherein the transmission component is a gear transmission component;

[0039] Figure 8 This is an exploded view of the parking device according to an embodiment of this application;

[0040] Figure 9 This is a perspective view of a parking device according to an embodiment of this application;

[0041] Figure 10 yes Figure 9 A cross-sectional view along the BB section line;

[0042] Figure 11 This is an exploded view of the parking device according to an embodiment of this application;

[0043] Figure 12 This is an exploded view of the planetary gear assembly and the transmission assembly;

[0044] Figure 13 This is a schematic diagram of a vehicle according to an embodiment of this application;

[0045] Figure 14 This is a schematic diagram of a vehicle according to an embodiment of this application;

[0046] Figure 15 This is a schematic diagram of a vehicle according to an embodiment of this application.

[0047] Figure label:

[0048] Vehicle 1000, Braking System 100, Parking Device 10, Braking Power Unit 1, Output Shaft 11, Ratchet 2, Pawl 3, First Mounting Hole 31, Second Mounting Hole 32, Electromagnet 4, Rotating Shaft 41, Permanent Magnet 42, First Coil 43, Second Coil 44, Housing 45, Lead Screw 51, Nut 52, First Screw Sleeve 521, Second Screw Sleeve 522, Transmission Assembly 53, First Gear 531, Second Gear 532, Belt 533, Intermediate Gear 53 4. Planetary gear assembly 54, sun gear 541, gear teeth 5411, gear shaft 5412, internal gear ring 542, planet gear 543, planet carrier 544, planetary pin shaft 545, thrust bearing 55, brake pad 61, clamp body 62, strain gauge 71, clamping component 72, housing 8, housing body 81, cover 82, bracket 91, pin 92, fixing plate 93, clearance hole 931, circuit board 94, partition 95, dustproof sealing cover 96, rolling bearing 97. Detailed Implementation

[0049] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0050] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0051] The following is combined Figures 1-15 This application provides a detailed description of a parking device 10 and a vehicle 1000 having the parking device 10, according to embodiments thereof.

[0052] Reference Figures 1-4 As shown, the parking device 10 according to the embodiment of this application may include a braking power device 1, a ratchet 2, a pawl 3, and an electromagnet 4. The braking power device 1 includes an output shaft 11, the ratchet 2 is connected to the output shaft 11 in a transmission manner, and the electromagnet 4 may include a rotating shaft 41. The rotating shaft 41 is rotatable, and the pawl 3 is mounted on the rotating shaft 41. The electromagnet 4 is used to drive the pawl 3 to lock the ratchet 2, thereby limiting the rotation of the output shaft 11.

[0053] Specifically, the braking power device 1 is a driving component. When the output shaft 11 rotates in one direction, it drives the brake pads 61 to brake the brake disc. The parking device 10 of this application uses a rotary electromagnet 4 as a power component. When the shaft 41 rotates, it drives the pawl 3 to rotate, thereby driving the pawl 3 to engage in the tooth groove of the ratchet 2 to lock the ratchet 2 and prevent the output shaft 11 of the braking power device 1 from rotating. This keeps the output shaft 11 of the braking power device 1 in the position where the brake pads 61 brake the brake disc, thus realizing the parking function. Since the brake disc is mounted on the wheel, the wheel cannot rotate at this time. At the same time, the pawl 3 is mounted on the shaft 41 and is directly connected to the shaft 41, saving the transmission structure between the pawl 3 and the shaft 41. Therefore, by using the electromagnet 4 to replace the parking motor and transmission structure in related technologies, the problems of high cost and large space occupation of parking devices in related technologies are solved.

[0054] Reference Figure 2 As shown, the pawl 3 is provided with a first mounting hole 31 and a second mounting hole 32, and the rotating shaft 41 is provided with a third mounting hole. The rotating shaft 41 passes through the first mounting hole 31. The parking device 10 also includes a pin 92, which passes through the second mounting hole 32 and the third mounting hole, thereby realizing the connection and fixation between the pawl 3 and the rotating shaft 41.

[0055] For example, pin 92 can be a flexible cylindrical pin, a tapered pin, etc.

[0056] The first mounting hole 31 and the second mounting hole 32 can both be cylindrical holes. The axes of the first mounting hole 31 and the second mounting hole 32 have an included angle, for example, the included angle can be 70° to 110°, such as 70°, 80°, 90°, 100°, 110°, etc.

[0057] In related technologies, when it is necessary to maintain a parked state, a parking motor is often used as the power component. The parking motor drives a complex transmission structure such as gears, which in turn drives the pawl and ratchet to lock the output shaft of the braking power device, thus achieving parking. However, the parking motor and transmission structure are costly and require a large space. According to the parking device 10 of this application embodiment, a rotary electromagnet 4 is used to drive the pawl 3 to lock the ratchet 2, thereby locking the output shaft 11 and achieving parking, which helps to reduce costs and save space.

[0058] In some embodiments of this application, reference is made to Figure 1 , Figure 3 , Figures 7-9 As shown, the braking power device 1 is a brake motor.

[0059] In some other embodiments of this application, the braking power device 1 includes a brake motor and a reducer. The brake motor is connected to the reducer, and the reducer includes an output shaft 11. The power of the brake motor is reduced by the reducer and then transmitted to the output shaft 11, which can prevent the output shaft 11 from rotating too fast.

[0060] In some embodiments of this application, reference is made to Figure 3 , Figure 5 As shown, when the rotating shaft 41 drives the pawl 3 to rotate in the first direction, the pawl 3 can lock the ratchet 2, thereby realizing the parking function; refer to Figure 4 , Figure 6 As shown, when the rotating shaft 41 drives the pawl 3 to rotate in the second direction, the pawl 3 can be separated from the ratchet 2, thereby realizing the release function; wherein, the first direction and the second direction are opposite directions. For example, the first direction is Figure 5 The F1 direction shown is the second direction. Figure 5 The direction shown is F2. When the pawl 3 separates from the ratchet 2, the brake pad 61 can separate from the brake disc, allowing the wheel to rotate.

[0061] Specifically, the rotating shaft 41 can drive the pawl 3 to rotate in a first direction or in a second direction. The electromagnet 4 of this application is a bidirectional rotating electromagnet. The bidirectional rotation of the bidirectional rotating electromagnet can drive the pawl 3 to lock the ratchet 2 and unlock the ratchet 2, thereby realizing the parking and unlocking functions.

[0062] In some embodiments of this application, reference is made to Figures 5-6 As shown, the electromagnet 4 may also include a permanent magnet 42, a first coil 43 and a second coil 44. The rotating shaft 41 is connected to the permanent magnet 42. The permanent magnet 42 is located between the first coil 43 and the second coil 44. When a positive current is passed through the first coil 43 and the second coil 44, the first coil 43 and the second coil 44 drive the permanent magnet 42 to rotate in a first direction. When a reverse current is passed through the first coil 43 and the second coil 44, the first coil 43 and the second coil 44 drive the permanent magnet 42 to rotate in a second direction. When the permanent magnet 42 rotates, it drives the rotating shaft 41 to rotate.

[0063] By simply energizing the first coil 43 and the second coil 44 in either the forward or reverse direction, the rotation direction of the permanent magnet 42 can be controlled, thereby controlling the rotation direction of the pawl 3. The control logic is simple, solving the problem of complex control of parking devices in related technologies. The electromagnet 4 of this application is a bidirectional rotating electromagnet, which has a simple structure and low cost.

[0064] In some embodiments, when the first coil 43 and the second coil 44 are de-energized, the electromagnet 4 has the function of maintaining torque, thereby keeping the pawl 3 in the target position. For example, when the pawl 3 is embedded in the tooth groove of the ratchet 2, de-energizing the first coil 43 and the second coil 44 can prevent the pawl 3 from coming off the ratchet 2, so that the pawl 3 firmly abuts against the ratchet 2, ensuring high reliability of the electronic parking brake.

[0065] In some embodiments of this application, the winding directions of the first coil 43 and the second coil 44 are opposite. Specifically, the opposite winding directions of the first coil 43 and the second coil 44 ensure that when currents are applied to the first coil 43 and the second coil 44 in the same direction, the magnetic field directions of the first coil 43 and the second coil 44 are opposite. This eliminates the need for separate power supply devices for the first coil 43 and the second coil 44; only one power supply device is required to determine the direction of movement of the permanent magnet 42. This reduces the complexity of the control logic of the electromagnet 4 and makes the drive control of the pawl 3 simpler and more reliable.

[0066] In some embodiments not shown in the figure, the electromagnet 4 may also include a first frame and a second frame, with a first coil 43 wound on the first frame and a second coil 44 wound on the second frame.

[0067] In some embodiments, the first skeleton may be a non-metallic skeleton, such as a plastic (e.g., PBT, nylon, PPS, etc.) or a composite material.

[0068] In other embodiments, the first frame may be a metal frame, such as aluminum or steel.

[0069] In some embodiments, the second skeleton may be a non-metallic skeleton, such as a plastic (e.g., PBT, nylon, PPS, etc.) or a composite material.

[0070] In other embodiments, the second frame may be a metal frame, such as aluminum or steel.

[0071] In some embodiments not shown in the figures, the electromagnet 4 may further include a first iron core and a second iron core, with a first coil 43 wound on the first iron core and a second coil 44 wound on the second iron core. The first iron core's effect on the first coil 43 includes enhancing magnetic induction intensity, concentrating magnetic flux, and improving efficiency. The second iron core's effect on the second coil 44 includes enhancing magnetic induction intensity, concentrating magnetic flux, and improving efficiency. The first iron core and the first coil 43 can form a first winding, and the second iron core and the second coil 44 can form a second winding.

[0072] In some embodiments, the first core may be silicon steel sheet, ferrite, etc.

[0073] In some embodiments, the second core may be silicon steel sheet, ferrite, etc.

[0074] In some embodiments of this application, reference is made to Figure 2 , Figures 5-6 As shown, the electromagnet 4 includes a housing 45, and the interior of the housing 45 has a first accommodating cavity. The permanent magnet 42, the first coil 43, and the second coil 44 are disposed in the first accommodating cavity. Thus, the housing 45 can protect the permanent magnet 42, the first coil 43, and the second coil 44 from collision with external parts and damage. One end of the rotating shaft 41 extends into the interior of the housing 45 to connect with the permanent magnet 42, and the other end of the rotating shaft 41 extends out of the exterior of the housing 45 to connect with the pawl 3.

[0075] In some embodiments, by reasonably setting the angle of rotation of the shaft 41 along the first and second directions, it can be ensured that the pawl 3 can engage or disengage with the ratchet 2.

[0076] In some other embodiments, a first limiting structure (not shown in the figure) and a second limiting structure (not shown in the figure) are provided inside the housing 45. The first limiting structure is used to limit the extreme position of the rotating shaft 41 rotating in a first direction, and the second limiting structure is used to limit the extreme position of the rotating shaft 41 rotating in a second direction, thereby preventing the rotating shaft 41 from rotating excessively and causing interference with surrounding components.

[0077] In some embodiments of this application, reference is made to Figure 1 , Figures 9-11 As shown, the parking device 10 may also include a housing 8, the interior of which has a second accommodating cavity. The ratchet 2, pawl 3 and electromagnet 4 are disposed in the second accommodating cavity. Thus, the housing 8 can protect the ratchet 2, pawl 3 and electromagnet 4 from collision with external parts and damage. The braking power device 1 includes a motor body and an output shaft 11. The output shaft 11 is connected to the motor body and the motor body is used to drive the output shaft 11 to rotate. The output shaft 11 extends into the interior of the housing 8.

[0078] Reference Figures 9-11 As shown, the housing 8 may include a housing body 81 and a cover 82, with a second accommodating cavity formed between the housing body 81 and the cover 82. The housing body 81 and the cover 82 are detachably connected, facilitating the installation, disassembly, and maintenance of components within the second accommodating cavity. For example, the housing body 81 and the cover 82 are fastened together by bolts or screws, which are simple in structure and low in cost.

[0079] In some embodiments of this application, reference is made to Figures 1-4 , Figure 7 As shown, the parking device 10 may further include a fixing plate 93, which is mounted on the housing 8, and the electromagnet 4 is mounted on the fixing plate 93. Specifically, refer to Figure 2 As shown, the outer shell 45 of the electromagnet 4 is mounted on the fixing plate 93. The fixing plate 93 is provided with a clearance hole 931. The rotating shaft 41 of the electromagnet 4 passes through the clearance hole 931 and is connected to the pawl 3.

[0080] In some embodiments of this application, the fixing plate 93 and the housing 8 can be connected and fixed by fasteners such as bolts, screws, and rivets, and the housing 45 of the electromagnet 4 and the fixing plate 93 can be connected and fixed by fasteners such as bolts, screws, and rivets.

[0081] In some embodiments of this application, reference is made to Figure 1 , Figures 3-4 , Figure 7 As shown, ratchet 2 is mounted on output shaft 11. Specifically, ratchet 2 is directly mounted on output shaft 11, which reduces the number of transmission components between ratchet 2 and output shaft 11, resulting in a simpler structure.

[0082] In some embodiments, the ratchet 2 can be mounted on the output shaft 11 via a key, spline, or other structure, so that when the ratchet 2 is locked, the output shaft 11 can also be locked. When the ratchet 2 is not locked, the output shaft 11 can drive the ratchet 2 to rotate synchronously when it rotates.

[0083] In other embodiments, the ratchet 2 and the output shaft 11 may also be an integral structure.

[0084] In some embodiments of this application, reference is made to Figures 9-11 As shown, the parking device 10 also includes a transmission mechanism, brake pads 61, and a brake disc. The transmission mechanism is connected to the output shaft 11, and the braking power device 1 is used to drive the brake pads 61 to brake the brake disc through the transmission mechanism to limit wheel rotation. By setting the transmission mechanism, the rotation of the output shaft 11 can be converted into linear movement of the brake pads 61.

[0085] Specifically, the brake disc is typically mounted on the wheel hub and rotates coaxially with the wheel. The brake disc is one of the core components of the parking device 10. The brake disc has a friction surface, which allows the brake pads 61 to perform friction braking.

[0086] In some embodiments of this application, the brake disc is a circular metal disc with a flat surface, and the two sides of the brake disc are friction surfaces.

[0087] In some embodiments of this application, the brake disc is provided with heat dissipation holes or ventilation slots to improve the heat dissipation performance of the brake disc and prevent the brake disc from overheating and causing damage.

[0088] exist Figures 9-11 In the example, there are two brake pads 61, located on opposite sides of the brake disc. When the brake pads 61 brake the brake disc, both brake pads 61 are in direct contact with the friction surfaces on their respective sides. The brake pads 61 are friction elements in the parking device 10, and their main function is to generate braking force through friction with the brake disc, thereby slowing down or stopping the wheels.

[0089] In some embodiments of this application, the brake pad 61 is composed of a friction material and a metal backing plate. The metal backing plate is used to enhance the strength of the brake pad 61. The friction material is at least disposed on the side of the metal backing plate facing the brake disc. The friction material is usually made of a variety of materials (such as asbestos, ceramics, metal fibers, etc.) and has a high coefficient of friction and good wear resistance.

[0090] In some embodiments of this application, reference is made to Figures 10-11 As shown, the transmission mechanism includes a lead screw 51 and a nut 52. The nut 52 is threadedly engaged with the lead screw 51. When the output shaft 11 rotates, it is adapted to drive the lead screw 51 to rotate, so that the nut 52 moves along the axial direction of the lead screw 51. When the nut 52 moves, it is adapted to drive the brake pad 61 to move, so that the brake pad 61 clamps the brake disc. Specifically, the brake pad 61 moves along the axial direction of the lead screw 51.

[0091] In some embodiments of this application, reference is made to Figures 10-11As shown, the nut 52 may include a first threaded sleeve 521 and a second threaded sleeve 522. The first threaded sleeve 521 is threadedly engaged with the lead screw 51, and the second threaded sleeve 522 is connected to the first threaded sleeve 521. When the first threaded sleeve 521 moves along the axial direction of the lead screw 51, the second threaded sleeve 522 moves synchronously with the first threaded sleeve 521. The second threaded sleeve 522 can be used to push the brake pad 61 to clamp the brake disc.

[0092] In some embodiments of this application, ball bearings are provided at the threaded connection between the nut 52 and the lead screw 51 to reduce the friction between the nut 52 and the lead screw 51, making the relative movement between the nut 52 and the lead screw 51 smoother.

[0093] In some embodiments of this application, reference is made to Figures 3-4 , Figures 7-8 As shown, the transmission mechanism also includes a transmission assembly 53, which includes a first wheel 531 and a second wheel 532. The first wheel 531 is mounted on the output shaft 11, and the second wheel 532 drives the first wheel 531. The lead screw 51 drives the second wheel 532. When the second wheel 532 rotates, it is suitable for driving the lead screw 51 to rotate.

[0094] In some embodiments of this application, the transmission component 53 may be disposed within the second accommodating cavity of the housing 8 so that the housing 8 protects the transmission component 53.

[0095] In some embodiments of this application, reference is made to Figures 3-4 , Figure 7 As shown, the axes of the second wheel 532 and the first wheel 531 are not collinear. For example, the axes of the second wheel 532 and the first wheel 531 are arranged parallel to each other. This allows the lead screw 51 to be set at a position far away from the braking power device 1, rather than on the axis of the braking power device 1, thereby making full use of the radial space of the braking power device 1 and reducing the overall size of the parking device 10 in the axial direction of the braking power device 1.

[0096] In some embodiments of this application, reference is made to Figures 3-4 As shown, the transmission assembly 53 is a belt drive assembly. Both the second pulley 532 and the first pulley 531 are pulleys, spaced apart from each other. The belt drive assembly also includes a belt 533, through which the second pulley 532 and the first pulley 531 are driven. Using the belt drive assembly 53 helps to reduce transmission noise during the transmission process.

[0097] In some embodiments, belt 533 may be a synchronous belt (e.g., a toothed belt), with toothed grooves on both the first wheel 531 and the second wheel 532. The synchronous belt can mesh with the toothed grooves of the first wheel 531 and the second wheel 532, thereby improving the accuracy of the transmission ratio.

[0098] In some embodiments, the belt 533 may be a V-belt, a flat belt, etc., and transmission is achieved by friction between the belt 533 and the first wheel 531 and the second wheel 532.

[0099] In some embodiments of this application, the transmission component 53 is a gear transmission component, and both the second wheel 532 and the first wheel 531 are gears. Gear transmission components offer high transmission accuracy, which helps ensure high accuracy in power transmission. For example, in... Figure 7 In the example shown, the gear transmission assembly 53 includes a first gear 531, an intermediate gear 534, and a second gear 532. The intermediate gear 534 is disposed between the second gear 532 and the first gear 531, and both the second gear 532 and the first gear 531 mesh with the intermediate gear 534.

[0100] In some optional embodiments, there may be multiple transmission gears between the second wheel 532 and the first wheel 531. Multi-stage transmission can achieve step-by-step speed change and can better set the position of the second wheel 532 so that the lead screw 51 is farther away from the electromagnet 4, avoiding interference between the lead screw 51 and the electromagnet 4.

[0101] In some embodiments of this application, reference is made to Figures 3-4 , Figure 7 As shown, the diameter of the second wheel 532 is larger than that of the first wheel 531. Therefore, the power of the braking power device 1 can be decelerated when it is transmitted from the first wheel 531 to the second wheel 532, thereby reducing the rotational speed of the lead screw 51 and preventing the brake pad 61 from moving too fast due to the high-speed rotation of the lead screw 51.

[0102] In some alternative embodiments, the second wheel 532 may directly engage with the first wheel 531 (not shown in the figure).

[0103] In some embodiments of this application, reference is made to Figures 3-4 , Figure 8 , Figures 10-12 As shown, the transmission mechanism also includes a planetary gear assembly 54. The lead screw 51 and the second wheel 532 are driven by the planetary gear assembly 54. When the second wheel 532 rotates, it is suitable to drive the lead screw 51 to rotate through the planetary gear assembly 54.

[0104] In some embodiments of this application, the planetary gear assembly 54 may be disposed within the second accommodating cavity of the housing 8 so that the housing 8 protects the planetary gear assembly 54.

[0105] In some embodiments of this application, the parking device 10 further includes a housing 8, and the planetary gear assembly 54 includes: a sun gear 541, an internal gear ring 542, planet gears 543, and a planet carrier 544. The sun gear 541 is fixedly connected to the second gear 532. When the second gear 532 rotates, it drives the sun gear 541 to rotate. The internal gear ring 542 is fixed to the housing 8. The planet gears 543 are arranged around the sun gear 541. The planet gears 543 are adapted to mesh with the sun gear 541 and the internal gear ring 542 simultaneously. When the sun gear 541 rotates, it drives the planet gears 543 to move along the internal gear ring 542. The planet carrier 544 supports the planet gears 543 so that the planet gears 543 can rotate around the axis of the planet gears 543. The planet carrier 544 is connected to the lead screw 51. When the planet gears 543 move, they drive the planet carrier 544 to rotate, so that the planet carrier 544 drives the lead screw 51 to rotate.

[0106] Specifically, the internal gear ring 542 is mounted on the housing 8 and is fixed, not rotating. The sun gear 541 rotates. Assuming the sun gear 541 rotates clockwise, since the planet gears 543 mesh with the sun gear 541, the planet gears 543 will be driven by the sun gear 541 to rotate counterclockwise around their own axes (because when gears mesh, adjacent gears rotate in opposite directions). Simultaneously, the planet gears 543 will also revolve around the central axis of the sun gear 541. Because the internal gear ring 542 is fixed, the direction of the planet gears 543's revolution is the same as the direction of the sun gear 541's rotation (clockwise). The planet carrier 544 is fixedly connected to the planet gears 543, so the planet carrier 544 will rotate clockwise along with the revolution of the planet gears 543. Thus, the rotation of the sun gear 541 is transmitted to the planet carrier 544 through the planet gears 543, and the planet carrier 544 rotates in the same direction as the sun gear 541, while the internal gear ring 542 remains stationary.

[0107] In some embodiments of this application, the planetary gear assembly 54 is a reduction mechanism that can reduce speed during transmission, thereby reducing the rotational speed of the lead screw 51 and preventing the brake pad 61 from moving too fast due to the high-speed rotation of the lead screw 51.

[0108] In some embodiments of this application, there are multiple planetary gears 543, which are arranged circumferentially around the sun gear 541.

[0109] In some embodiments of this application, the planetary gear assembly 54 further includes a planetary pin 545. There are multiple planetary gears 543 and planetary pins 545, and the planetary gears 543 and planetary pins 545 correspond one-to-one. The planetary gears 543 are mounted on the corresponding planetary pins 545, and the planetary pins 545 are also mounted on the planet carrier 544.

[0110] In some embodiments of this application, the sun gear 541 and the second gear 532 can be connected by a structure such as a flat key or spline. Figure 12As shown, the sun gear 541 is provided with a spline, and the second gear 532 is provided with a spline groove. The spline and the spline groove cooperate, so that the rotation of the second gear 532 can be transmitted to the sun gear 541, the power transmission is accurate, and there will be no slippage between the second gear 532 and the sun gear 541.

[0111] In some embodiments of this application, the lead screw 51 and the planetary carrier 544 can be connected by a structure such as a flat key or spline. Figure 11 As shown, the lead screw 51 is provided with a spline, and the planet carrier 544 is provided with a spline groove. The spline and the spline groove cooperate, so that the rotation of the planet carrier 544 can be transmitted to the lead screw 51, the power transmission is accurate, and there is no slippage between the planet carrier 544 and the lead screw 51.

[0112] In some embodiments of this application, reference is made to Figures 10-11 As shown, the parking device 10 also includes a rolling bearing 97, which is disposed on the planetary carrier 544 and installed in the bearing hole of the housing 8, thereby making the planetary carrier 544 rotate more smoothly and steadily.

[0113] In some embodiments not shown in the figures, the sun gear 541 includes a toothed portion 5411 and a shaft 5412. The toothed portion 5411 is disposed on the shaft 5412, and the ratchet 2 is disposed on the shaft 5412, meaning that the ratchet 2 is not directly disposed on the output shaft 11. The ratchet 2 and the shaft 5412 can be mounted on the shaft 5412 via a key, spline, or other structure. Thus, when the ratchet 2 is locked, the shaft 5412 can also be locked. When the ratchet 2 is not locked, the rotation of the shaft 5412 can drive the ratchet 2 to rotate synchronously. In other embodiments, the ratchet 2 and the shaft 5412 can also be an integral structure.

[0114] In some embodiments of this application, the ratchet 2 is disposed on other intermediate components that drive the output shaft 11.

[0115] In some embodiments of this application, reference is made to Figures 8-11 As shown, the parking device 10 also includes a caliper 62, on which a brake pad 61 is mounted, and the brake pad 61 is movable relative to the caliper 62 so that the brake pad 61 moves closer to or further away from the brake disc.

[0116] In some embodiments of this application, reference is made to Figures 8-11 As shown, the parking device 10 also includes a strain gauge 71 and a circuit board 94. The strain gauge 71 is mounted on the clamp body 62 and connected to the circuit board 94. A thrust bearing 55 is provided between the lead screw 51 and the clamp body 62. One end of the thrust bearing 55 abuts against the lead screw 51, and the other end abuts against the clamp body 62. The thrust bearing 55 can be a thrust needle roller bearing, a thrust ball bearing, etc.

[0117] When the brake pad 61 abuts against the brake disc, the reaction force of the brake disc on the brake pad 61 can be applied to the caliper 62 through the lead screw 51 and the thrust bearing 55. The caliper 62 further acts on the strain gauge 71, so that the strain gauge 71 can detect the pressure of the caliper 62 and sense the pressure of the brake (i.e., braking). The strain gauge 71 is connected to the circuit board 94. The speed and direction of the braking power device 1 can be adjusted through the circuit board 94, thereby controlling the braking force and adjusting the braking effect.

[0118] In related technologies, the brake control of the EMB system (Electro-Mechanical Brake 100) is achieved by sensing the brake pressure through a pressure sensor installed inside the caliper, and then adjusting the speed and direction of the braking force device through a central control circuit board to control the braking force and thus adjust the braking effect. However, installing a pressure sensor along the axial direction of the lead screw 51 requires a large amount of space and is costly, affecting the overall vehicle layout. According to the embodiment of this application, the parking device 10 eliminates the pressure sensor and uses a strain gauge 71 to detect the pressure in the caliper 62. The strain gauge 71 has a sheet-like structure, which saves space in the axial direction of the lead screw 51 compared to a pressure sensor, facilitating the overall vehicle layout and reducing cost.

[0119] In some embodiments of this application, a strain gauge 71 is attached to the position of the thrust bearing 55 corresponding to the clamp 62. The strain gauge 71 is connected to the circuit board 94. After the strain gauge 71 is calibrated, different strains correspond to different forces, which are calculated by the software algorithm burned into the circuit board 94, thereby controlling the braking force and braking effect of the parking device 10.

[0120] In some embodiments of this application, the clamp 62 may be mounted on the chassis of the vehicle 1000.

[0121] In some embodiments of this application, reference is made to Figure 11 As shown, the parking device 10 may further include a clamping member 72, which is mounted on the clamp body 62. A strain gauge 71 is located between the clamping member 72 and the clamp body 62, and the clamping member 72 presses the strain gauge 71 firmly onto the clamp body 62. Specifically, a strain gauge 71 is attached to the thrust bearing 55 at the position corresponding to the clamp body 62, and the clamping member 72 is added to press and fix it in place. This effectively prevents the strain gauge 71 from falling off, increases the fit between the strain gauge 71 and the clamp body 62, and improves the accuracy of the strain gauge 71 measurement results.

[0122] In some embodiments, the clamping member 72 has a plate-like structure, which results in a smaller thickness of the clamping member 72. The thickness direction of the clamping member 72 is consistent with the axial direction of the lead screw 51, which helps to reduce the size of the clamping member 72 in the axial direction of the lead screw 51.

[0123] In some embodiments, the clamping member 72 has a block structure, which helps to improve the strength of the clamping member 72 and allows the clamping member 72 to better press the strain gauge 71 onto the clamp body 62.

[0124] In some embodiments of this application, reference is made to Figure 8 As shown, the parking device 10 also includes a partition 95, and a circuit board 94 is disposed between the partition 95 and the cover 82. Thus, the circuit board 94 can be protected. The partition 95 can isolate the circuit board 94 from other moving parts, thereby preventing the moving parts from damaging the circuit board 94 during movement.

[0125] In some embodiments of this application, the parking device 10 further includes a bracket 91 and a clamp 62. The bracket 91 is adapted to be mounted on the chassis of the vehicle 1000. The clamp 62 is mounted on the bracket 91 and is slidable relative to the bracket 91. The brake pad 61 is mounted on the clamp 62 and is movable relative to the clamp 62 so that the brake pad 61 moves closer to or further away from the brake disc.

[0126] In some embodiments of this application, the parking device 10 further includes a return elastic element (not shown in the figure), which is mounted on the caliper body 62 and is also connected to the brake pad 61. The return elastic element is used to apply an elastic force to the brake pad 61 to separate the brake pad 61 from the brake disc. For example, when the nut 52 moves along the screw 51 toward the brake disc, the return elastic element is compressed and stores energy; when the nut 52 moves along the screw 51 away from the brake disc, the return elastic element can release energy, pushing the brake pad 61 away from the brake disc, ensuring sufficient clearance between the brake pad 61 and the brake disc, and avoiding unnecessary friction and wear between the brake pad 61 and the brake disc.

[0127] Reference Figures 9-11 As shown, the two brake pads 61 include a first brake pad 611 and a second brake pad 612. A first return elastic element is provided between the first brake pad 611 and the caliper body 62, and a second return elastic element is provided between the second brake pad 612 and the caliper body 62. When the nut 52 moves along the screw 51 towards the brake disc, the nut 52 pushes the first brake pad 611 towards the brake disc. After the first brake pad 611 contacts the brake disc, it rubs against it, causing the first brake pad 611 to generate a reaction force. The caliper body 62 is a floating caliper body. Due to this reaction force, the caliper body 62 slides relative to the bracket 91, thereby causing the second brake pad 612 to clamp the brake disc. When the nut 52 moves along the screw 51 away from the brake disc, the first return elastic element can release energy, pushing the first brake pad 611 away from the brake disc, and the second return elastic element will push the second brake pad 612 away from the brake disc.

[0128] For example, the return elastic element can be a spring, a leaf spring, etc.

[0129] In some embodiments of this application, reference is made to Figures 10-11 As shown, the parking device 10 also includes a dustproof sealing cover 96.

[0130] The following describes a specific example of a parking device 10 of this application.

[0131] like Figures 9-12 As shown, the parking device 10 mainly consists of a braking power unit 1, an electromagnet 4, a gearbox, a caliper body 62, brake pads 61, and a brake disc. The gearbox includes a housing 8, a lead screw 51, a nut 52, a transmission assembly 53, and a planetary gear assembly 54. The braking power unit 1 is the driving component. The output shaft 11 of the braking power unit 1 is fixed together with the ratchet 2 and the first wheel 531, and then the transmission is transmitted to the planetary gear assembly 54 through the second wheel 532. The planet carrier 544 of the planetary gear assembly 54 is connected to the lead screw 51 through a spline to transmit torque. The planetary gear assembly 54 drives the lead screw 51 to rotate, and the nut 52 pushes the brake pads 61 to realize the braking function of the vehicle 1000. The ratchet 2 is fixed on the output shaft 11 of the braking power unit 1 (but not limited to being fixed on the output shaft 11, it can also be fixed on the axle 5412 of the sun gear 541). For the entire system, the torque on the output shaft 11 of the braking power unit 1 is the smallest, and the pressure on the ratchet 2 and the pawl 3 is the smallest. When the vehicle stops at 1000 and the electronic parking brake is activated, the pawl 3 will lock the ratchet 2, preventing the entire mechanical braking transmission system from moving in the direction of releasing the brake, thus achieving the parking function.

[0132] like Figures 1-6 As shown, the pawl 3 is connected to the shaft 41 of the electromagnet 4. The housing 45 of the electromagnet 4 is fixed to the fixing plate 93, which is fixed to the housing body 81 by screws. The electromagnet 4 can rotate forward or backward by the required angle, and this can be achieved simply by energizing the first coil 43 and the second coil 44 of the electromagnet 4 in either the forward or reverse direction. The control is simple and the control circuit cost is low. The electromagnet 4 drives the pawl 3 to rotate forward or backward, thereby locking or unlocking the ratchet 2, thus selectively realizing the parking function of the electromechanical braking system.

[0133] like Figures 9-12As shown, the parking device 10 mainly consists of two parts: the gearbox control assembly and the caliper assembly. The gearbox uses the braking power unit 1 as the power element, which drives the transmission assembly 53 to transmit power to the planetary gear assembly 54. The second gear 532 is fixed to the sun gear 541 via a spline. The sun gear 541 drives the planet gears 543 to move inside the internal gear ring 542. The internal gear ring 542 is fixed to the gearbox housing 8. The planet carrier 544 is also designed with internal splines and is connected to the external splines of the lead screw 51 to realize power transmission. Thus, the power of the planetary gear assembly 54 is transmitted to the lead screw 51. Subsequently, the rotational motion of the lead screw 51 is converted into the linear motion of the nut 52. The nut 52 pushes the brake pad 61 to brake the brake disc, thereby realizing the braking function.

[0134] like Figure 10 As shown, a thrust needle roller bearing is designed at the top of the lead screw 51. A strain gauge 71 is attached to the clamp body 62 corresponding to the thrust needle roller bearing. The clamping member 72 presses the strain gauge 71 onto the clamp body 62 with screws to prevent the strain gauge 71 from loosening. When the lead screw 51 pushes the brake pad 61 to work, the thrust will push against the thrust needle roller bearing and transmit the force to the clamp body 62. The strain gauge 71 on the clamp body 62 will then experience corresponding strain. The force corresponding to the strain is calibrated. Then, the software algorithm in the control circuit board 94 will convert the strain value into the force of the brake pad 61. The system will control the brake through force feedback, thereby achieving the braking effect of the parking device 10 consistent with the preset target value, thus achieving the ideal braking effect.

[0135] Reference Figure 13 As shown, the braking system 100 according to a second aspect embodiment of this application includes the parking device 10 of the above embodiment. The braking system 100 of this application is an electromechanical braking system.

[0136] According to the braking system 100 of the present application embodiment, the parking device 10 uses a rotary electromagnet 4 to drive the pawl 3 to lock the ratchet 2, thereby locking the output shaft 11 and realizing parking, which is beneficial to reduce costs and save space.

[0137] Reference Figure 14 As shown, the vehicle 1000 according to the third aspect of this application includes the parking device 10 of the above embodiment.

[0138] Reference Figure 15 As shown, the vehicle 1000 according to the fourth aspect of this application includes the braking system 100 of the above embodiment.

[0139] According to the embodiments of this application, the vehicle 1000 uses a parking device 10 with a rotary electromagnet 4 to drive the pawl 3 to lock the ratchet 2, thereby locking the output shaft 11 and realizing parking, which helps to reduce costs and save space.

[0140] In the description of this application, it should be understood that the terms "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0141] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0142] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0143] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A parking device (10), characterized in that, include: Braking power device (1), the braking power device (1) includes an output shaft (11); Ratchet (2), which is connected to the output shaft (11) for transmission; thorns (3); An electromagnet (4) includes a rotatable shaft (41), a pawl (3) is mounted on the shaft (41), and the electromagnet (4) is used to drive the pawl (3) to lock the ratchet (2) to limit the rotation of the output shaft (11).

2. The parking device (10) according to claim 1, characterized in that, When the rotating shaft (41) drives the pawl (3) to rotate in the first direction, the pawl (3) can lock the ratchet (2). When the rotating shaft (41) drives the pawl (3) to rotate in the second direction, the pawl (3) can separate from the ratchet (2). Wherein, the first direction and the second direction are opposite directions.

3. The parking device (10) according to claim 2, characterized in that, The electromagnet (4) also includes: A permanent magnet (42) is connected to the rotating shaft (41); The first coil (43) and the second coil (44) are connected. The permanent magnet (42) is located between the first coil (43) and the second coil (44). When a positive current is passed through the first coil (43) and the second coil (44), the first coil (43) and the second coil (44) drive the permanent magnet (42) to rotate in the first direction. When a reverse current is passed through the first coil (43) and the second coil (44), the first coil (43) and the second coil (44) drive the permanent magnet (42) to rotate in the second direction. When the permanent magnet (42) rotates, it drives the rotating shaft (41) to rotate.

4. The parking device (10) according to claim 3, characterized in that, The first coil (43) has the opposite winding direction to the second coil (44).

5. The parking device (10) according to any one of claims 1-4, characterized in that, The ratchet (2) is mounted on the output shaft (11).

6. The parking device (10) according to any one of claims 1-4, characterized in that, The parking device (10) further includes a transmission mechanism, brake pads (61) and brake disc. The transmission mechanism is connected to the output shaft (11) for transmission. The braking power device (1) is used to drive the brake pads (61) to brake the brake disc through the transmission mechanism to limit the rotation of the wheels.

7. The parking device (10) according to claim 6, characterized in that, The transmission mechanism includes a lead screw (51) and a nut (52). The nut (52) is threadedly engaged with the lead screw (51). When the output shaft (11) rotates, it is adapted to drive the lead screw (51) to rotate so that the nut (52) moves along the axial direction of the lead screw (51). When the nut (52) moves, it is adapted to drive the brake pad (61) to move so that the brake pad (61) clamps the brake disc.

8. The parking device (10) according to claim 7, characterized in that, The transmission mechanism further includes a transmission assembly (53), which includes: The first wheel (531) is mounted on the output shaft (11); The second wheel (532) is driven by the first wheel (531), and the lead screw (51) is driven by the second wheel (532). When the second wheel (532) rotates, it is suitable to drive the lead screw (51) to rotate.

9. The parking device (10) according to claim 8, characterized in that, The transmission assembly (53) is a belt drive assembly, wherein the second wheel (532) and the first wheel (531) are both pulleys, and the second wheel (532) and the first wheel (531) are spaced apart. The belt drive assembly also includes a belt (533), and the second wheel (532) and the first wheel (531) are driven by the belt (533); or, The transmission component (53) is a gear transmission component, and both the second wheel (532) and the first wheel (531) are gears.

10. The parking device (10) according to claim 8, characterized in that, The diameter of the second wheel (532) is larger than the diameter of the first wheel (531).

11. The parking device (10) according to claim 8, characterized in that, The transmission mechanism further includes a planetary gear assembly (54), and the lead screw (51) and the second wheel (532) are driven by the planetary gear assembly (54). When the second wheel (532) rotates, it is adapted to drive the lead screw (51) to rotate through the planetary gear assembly (54).

12. The parking device (10) according to claim 11, characterized in that, The parking device (10) also includes a housing (8), and the planetary gear assembly (54) includes: A sun gear (541) is fixedly connected to the second gear (532), and the second gear (532) rotates to drive the sun gear (541) to rotate. An internal gear ring (542) is fixed to the housing (8); Planetary gears (543) are arranged around the sun gear (541). The planetary gears (543) are adapted to mesh with the sun gear (541) and the internal gear ring (542) simultaneously. When the sun gear (541) rotates, it drives the planetary gears (543) to move along the internal gear ring (542). Planetary carrier (544) supports the planetary gear (543) so that the planetary gear (543) can rotate around the axis of the planetary gear (543). The planetary carrier (544) is connected to the lead screw (51). When the planetary gear (543) moves, it drives the planetary carrier (544) to rotate, so that the planetary carrier (544) drives the lead screw (51) to rotate.

13. The parking device (10) according to claim 12, characterized in that, The sun gear (541) includes a toothed portion (5411) and a shaft (5412), the toothed portion (5411) being disposed on the shaft (5412), and the ratchet (2) being disposed on the shaft (5412).

14. The parking device (10) according to claim 7, characterized in that, The parking device (10) also includes: A clamp body (62) is provided, on which the brake pad (61) is mounted, and the brake pad (61) is movable relative to the clamp body (62) to move the brake pad (61) closer to or further away from the brake disc.

15. The parking device (10) according to claim 14, characterized in that, The parking device (10) also includes: Strain gauge (71) is mounted on the clamp body (62). A thrust bearing (55) is provided between the lead screw (51) and the clamp body (62). One end of the thrust bearing (55) abuts against the lead screw (51) and the other end abuts against the clamp body (62). Circuit board (94), the strain gauge (71) is connected to the circuit board (94).

16. The parking device (10) according to claim 15, characterized in that, The parking device (10) further includes a clamping member (72), which is installed on the clamp body (62), and the strain gauge (71) is located between the clamping member (72) and the clamp body (62). The clamping member (72) presses the strain gauge (71) onto the clamp body (62).

17. The parking device (10) according to claim 7, characterized in that, The parking device (10) also includes: A bracket (91) adapted to be mounted on the chassis of a vehicle (1000); A clamp body (62) is mounted on the bracket (91) and is slidable relative to the bracket (91). A brake pad (61) is mounted on the clamp body (62) and is movable relative to the clamp body (62) so that the brake pad (61) moves closer to or further away from the brake disc.

18. The parking device (10) according to claim 17, characterized in that, The parking device (10) further includes a return elastic element, which is installed on the clamp body (62) and is also connected to the brake pad (61). The return elastic element is used to apply an elastic force to the brake pad (61) to separate the brake pad (61) from the brake disc.

19. The parking device (10) according to any one of claims 1-4, characterized in that, The braking power device (1) is a brake motor; or, the braking power device (1) includes a brake motor and a reducer, the brake motor is connected to the reducer, and the reducer includes the output shaft (11).

20. A braking system (100), characterized in that, The parking device (10) includes any one of claims 1-19.

21. A vehicle (1000), characterized in that, It includes the parking device (10) according to any one of claims 1-19 or the braking system (100) according to claim 20.

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