Locking structure, parking device, parking system and vehicle

Abstract

The invention discloses a locking structure, a parking device, a parking system and a vehicle. The locking structure comprises a first locking piece, a second locking piece and a driving device, the first locking piece is suitable for being fixedly arranged on an output shaft of the brake motor, the driving device, the second locking piece and the first locking piece are arranged in the axial direction of the output shaft, and the driving device is used for driving the second locking piece to move in the axial direction of the output shaft. Therefore, the second locking piece locks the first locking piece so as to limit the rotation of the output shaft. According to the locking structure, the driving device, the second locking piece and the first locking piece are arranged in the axial direction of the output shaft, the situation that the radial space around the brake motor is occupied is avoided, integration of the brake motor and the locking structure in the radial direction of the brake motor is more compact, and occupation of the radial space of the brake motor by the locking structure is reduced; the radial size of the locking structure can be designed in a miniaturized mode, and the locking structure can be widely applied to occasions with strict requirements for the radial space size.

Description

Technical Field

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

[0002] In related technologies, the locking structure mainly uses a radially arranged drive device to drive the second locking member to engage with the first locking member in order to lock the output shaft of the brake motor. However, this locking structure occupies a large space and is not conducive to its arrangement on the brake motor. Summary of the Invention

[0003] This application aims to at least partially address one of the aforementioned technical problems in the prior art. To this end, this application proposes a locking structure that helps reduce the space occupied by the locking structure.

[0004] This application also proposes a parking device having the above-described locking structure.

[0005] This application also proposes a parking system having the above-mentioned parking device.

[0006] This application also proposes a vehicle having the above-described parking device or parking system.

[0007] According to a first aspect embodiment of this application, the locking structure includes a first locking member, a second locking member, and a driving device. The first locking member is adapted to be fixedly disposed on the output shaft of a brake motor. The driving device, the second locking member, and the first locking member are arranged axially along the output shaft. The driving device is used to drive the second locking member to move axially along the output shaft so that the second locking member locks the first locking member to restrict the rotation of the output shaft.

[0008] According to the locking structure of the first aspect of this application, by arranging the driving device, the second locking member and the first locking member along the axial direction of the output shaft, the axial space of the output shaft of the brake motor is fully utilized, avoiding the occupation of the radial space around the brake motor. This makes the brake motor and the locking structure more compactly integrated in the radial direction of the brake motor, reduces the occupation of the radial space of the brake motor by the locking structure, and is conducive to the miniaturization design of the radial dimension of the locking structure. It can be more widely used in occasions with strict requirements for radial space dimensions.

[0009] According to some embodiments of this application, the driving device drives the second locking member away from the first locking member along the axial direction of the output shaft so that the second locking member unlocks the first locking member.

[0010] According to some embodiments of this application, the second locking member includes teeth located at one end of the second locking member near the first locking member, and when the second locking member is driven by the driving device, the teeth are adapted to lock or unlock the first locking member.

[0011] According to some embodiments of this application, the driving device includes an electromagnetic drive element for driving the second locking element to move axially along the output shaft.

[0012] According to some embodiments of this application, the second locking member further includes a magnetizing portion, the electromagnetic driving member includes a coil and a permanent magnet, the coil is adapted to magnetize the magnetizing portion when energized, and the permanent magnet is adapted to interact with the magnetizing portion to move the magnetizing portion axially in the output shaft.

[0013] According to some embodiments of this application, the coil is located outside the magnetized portion in the radial direction of the output shaft.

[0014] According to some embodiments of this application, the coil includes a first coil and a second coil, the permanent magnet includes a first permanent magnet, the magnetization part includes a first magnetization part and a second magnetization part, and in the axial direction of the output shaft, the first coil is located on the side of the second coil away from the first locking member, the first permanent magnet is located between the first coil and the second coil, and the first magnetization part is located on the side of the second magnetization part away from the first locking member.

[0015] According to some embodiments of this application, the winding directions of the first coil and the second coil are opposite.

[0016] According to some embodiments of this application, the electromagnetic drive further includes an iron core located on at least one side of the second locking member in the axial direction of the output shaft, and the iron core is adapted to drive the second locking member to move axially along the output shaft when magnetized by the coil.

[0017] According to some embodiments of this application, the iron core includes at least a first iron core and a second iron core, wherein the first iron core is located on the side of the second locking member away from the first locking member, and the second iron core is disposed on the side of the first iron core close to the first locking member.

[0018] According to some embodiments of this application, the magnetized portion is adapted to abut against one of the first iron core and the second iron core.

[0019] According to some embodiments of this application, the permanent magnet includes a second permanent magnet and a third permanent magnet, and the coil includes a third coil located between the second permanent magnet and the third permanent magnet in the axial direction of the output shaft.

[0020] According to some embodiments of this application, the second permanent magnet and the third permanent magnet have the same magnetic poles on opposite sides.

[0021] According to some embodiments of this application, the locking structure includes a fixing frame, the magnetized part extends at least partially into the fixing frame, and the electromagnetic drive is mounted in the fixing frame.

[0022] According to some embodiments of this application, the fixing frame includes a first housing and a winding drum, the winding drum is disposed inside the first housing and is fixedly connected to the first housing, and the coil is wound on the winding drum.

[0023] According to some embodiments of this application, the permanent magnet is mounted on the mounting frame.

[0024] According to some embodiments of this application, the fixing frame includes an anti-rotation structure that cooperates with the second locking member to restrict the circumferential rotation of the second locking member.

[0025] According to some embodiments of this application, the outer peripheral wall of the cross section of the second locking member along the radial direction of the output shaft is formed as non-circular, and the outer peripheral wall of the second locking member is adapted to cooperate with the anti-rotation structure to restrict the rotational freedom of the second locking member.

[0026] According to some embodiments of this application, the driving device includes an electric driving component and a first rotating component. The first rotating component is sleeved on the outer peripheral surface of the second locking component. The electric driving component is used to drive the first rotating component to rotate. When the first rotating component rotates, it drives the second locking component to move along the axial direction of the output shaft, so that the second locking component locks or unlocks the first locking component.

[0027] According to some embodiments of this application, the first rotating member includes a first thread, and the second locking member includes a second thread. The first thread engages with the second thread to drive the second locking member to move axially along the output shaft when the first rotating member rotates.

[0028] According to some embodiments of this application, the drive device further includes a second housing, and the electric drive member and the first rotating member are disposed within the second housing.

[0029] According to some embodiments of this application, the first rotating member and the second locking member can achieve thread self-locking.

[0030] The parking device according to a second aspect embodiment of this application includes the locking structure described above.

[0031] According to the second aspect of the present application, the parking device has a locking structure that fully utilizes the axial space of the output shaft of the brake motor by arranging the drive device, the second locking member and the first locking member along the axial direction of the output shaft, thereby avoiding the occupation of the radial space around the brake motor. This makes the brake motor and the locking structure more compactly integrated in the radial direction of the brake motor, reduces the occupation of the radial space of the brake motor by the locking structure, and is conducive to the miniaturization design of the radial dimension of the locking structure. It can be more widely used in occasions with strict requirements for radial space dimensions.

[0032] According to some embodiments of this application, the parking device further includes a brake disc and a brake motor, the brake motor including an output shaft, the output shaft being adapted to clamp the brake disc to limit wheel rotation when rotated, and the first locking member being adapted to be fixedly disposed on the output shaft.

[0033] According to some embodiments of this application, the brake motor further includes a drive body connected to the output shaft, the drive body being adapted to drive the output shaft to rotate, and the parking device further includes a transmission mechanism, the output shaft being connected to the brake disc via the transmission mechanism, wherein the locking structure is located between the transmission mechanism and the drive body, or the locking structure is located on the side of the drive body away from the transmission mechanism.

[0034] According to some embodiments of this application, the parking device further includes a controller adapted to be connected to the locking structure, the controller being used to control the locking structure.

[0035] The parking system according to a third aspect of this application includes the parking device described above.

[0036] According to the parking system of the third aspect of this application, the locking structure of the parking device makes full use of the axial space of the output shaft of the brake motor by arranging the drive device, the second locking member and the first locking member along the axial direction of the output shaft, avoiding the occupation of the radial space around the brake motor. This makes the brake motor and the locking structure more compactly integrated in the radial direction of the brake motor, reduces the occupation of the radial space of the brake motor by the locking structure, and is conducive to the miniaturization design of the radial dimension of the locking structure. It can be more widely used in occasions with strict requirements for radial space dimensions.

[0037] The vehicle according to the fourth aspect of this application includes the parking device described above, or the parking system described above.

[0038] According to the fourth aspect of the present application, the locking structure of the parking device of the vehicle makes full use of the axial space of the output shaft of the brake motor by arranging the drive device, the second locking member and the first locking member along the axial direction of the output shaft, avoiding the occupation of the radial space around the brake motor. This makes the brake motor and the locking structure more compactly integrated in the radial direction of the brake motor, reduces the occupation of the radial space of the brake motor by the locking structure, and is conducive to the miniaturization design of the radial dimension of the locking structure. It can be more widely used in occasions with strict requirements for radial space dimensions.

[0039] 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

[0040] Figure 1 This is a three-dimensional schematic diagram of the locking structure according to the first embodiment of this application;

[0041] Figure 2 This is a cross-sectional view of the locking structure according to the first embodiment of this application;

[0042] Figure 3 This is a perspective view of the unlocking of the locking structure according to the first embodiment of this application;

[0043] Figure 4 This is a cross-sectional view of the unlocking of the locking structure according to the first embodiment of this application;

[0044] Figure 5 This is a partial cross-sectional view of the locking structure according to the second embodiment of this application;

[0045] Figure 6 This is a top view of the parking device according to the first embodiment of this application;

[0046] Figure 7 This is a perspective view of a parking device according to the first embodiment of this application;

[0047] Figure 8 This is a perspective view of the brake motor and locking structure in the locked state according to the first embodiment of this application;

[0048] Figure 9 This is a perspective view of the brake motor and locking structure in the unlocked state according to the first embodiment of this application;

[0049] Figure 10 This is a top view of the brake motor and locking structure according to the first embodiment of this application;

[0050] Figure 11 This is a cross-sectional view of the brake motor and locking structure according to the first embodiment of this application;

[0051] Figure 12 This is a cross-sectional view of the brake motor, transmission mechanism, second housing, and locking structure according to the first embodiment of this application;

[0052] Figure 13 This is a cross-sectional view of the brake motor, transmission mechanism, second housing, and locking structure according to the second embodiment of this application;

[0053] Figure 14 This is a cross-sectional view of the parking device according to the first embodiment of this application;

[0054] Figure 15 This is a magnetic schematic diagram of the locking structure according to the first embodiment of this application when locked;

[0055] Figure 16 This is a magnetic schematic diagram of the locking structure unlocking according to the first embodiment of this application;

[0056] Figure 17 This is a cross-sectional view of the unlocking of the locking structure according to the third embodiment of this application;

[0057] Figure 18 This is a cross-sectional view of the locking structure according to the third embodiment of this application;

[0058] Figure 19 This is a magnetic schematic diagram of the unlocking of the locking structure according to the third embodiment of this application;

[0059] Figure 20 This is a magnetic schematic diagram of the locking structure according to the third embodiment of this application;

[0060] Figure 21 This is a schematic diagram of a parking system according to an embodiment of this application;

[0061] Figure 22 This is a schematic diagram of a vehicle according to the first embodiment of this application;

[0062] Figure 23 This is a schematic diagram of a vehicle according to the second embodiment of this application.

[0063] Figure label:

[0064] Vehicle 1000, parking device 100, parking system 200, locking structure 10, first locking element 1, second locking element 2, toothed part 21, connecting part 22, magnetized part 23, first magnetized part 231, second magnetized part 232, driving device 3, fixing frame 31, winding drum 311, anti-rotation structure 312, first housing 32, electromagnetic driving element 33, first coil 331, second coil 332, first permanent magnet 333, first iron core 334, second iron core 335, second permanent magnet 336, third permanent magnet 337, third coil 338, electric driving element 34, stator 341, rotor Sub-component 342, first rotating component 35, first bearing 36, first fixing component 37, second housing 38, brake disc 20, friction plate 30, brake motor 40, output shaft 401, drive body 402, push component 50, second screw sleeve 501, push plate 502, first gear 601, second gear 602, second gear shaft 6021, intermediate gear 603, intermediate gear shaft 6031, reversing transmission mechanism 70, second rotating component 701, second moving component 702, third housing 80, positioning column 801, controller 901, force sensor 902, second bearing 903, clamp body 904. Detailed Implementation

[0065] 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.

[0066] 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.

[0067] The following is combined with Figures 1-23 The present application describes in detail the locking structure 10, the parking device 100 having the locking structure 10, and the vehicle 1000 having the parking device 100 according to embodiments of the present application.

[0068] Reference Figures 1-5As shown, the locking structure 10 according to the first aspect embodiment of this application includes a first locking member 1, a second locking member 2, and a driving device 3. The first locking member 1 is adapted to be fixedly mounted on the output shaft 401 of the brake motor 40. The driving device 3, the second locking member 2, and the first locking member 1 are arranged along the axial direction of the output shaft 401. The driving device 3 is used to drive the second locking member 2 to move along the axial direction of the output shaft 401 so that the second locking member 2 locks the first locking member 1 to restrict the rotation of the output shaft 401.

[0069] Specifically, the drive unit 3, the second locking member 2, and the first locking member 1 are arranged axially along the output shaft 401, making full use of the axial space of the output shaft 401 of the brake motor 40 and avoiding occupying the radial space around the brake motor 40. This makes the integration of the brake motor 40 and the locking structure 10 more compact, which is beneficial for miniaturization design and can be more widely used in occasions with strict space requirements (such as the parking device 100 of the vehicle 1000, the braking mechanism of precision instruments, etc.). At the same time, the second locking member 2 is directly driven to move axially by the drive unit 3 to lock the first locking member 1. The action process is simple, without the need for a complex transmission mechanism, reducing power transmission links and shortening the response time. This enables rapid locking of the output shaft 401 of the brake motor 40, improving the system's working efficiency.

[0070] In related technologies, the locking structure mainly uses a radially arranged drive device to drive the second locking member to engage with the first locking member in order to lock the output shaft of the brake motor. However, this locking structure occupies a large space and is not conducive to its arrangement on the brake motor.

[0071] According to the locking structure 10 of the first aspect of this application, by arranging the driving device 3, the second locking member 2 and the first locking member 1 along the axial direction of the output shaft 401, the axial space of the output shaft 401 of the brake motor 40 is fully utilized, avoiding the occupation of the radial space around the brake motor 40. This makes the brake motor 40 and the locking structure 10 more compactly integrated in the radial direction of the brake motor 40, reducing the occupation of the radial space of the brake motor 40 by the locking structure 10. This is beneficial to the miniaturization design of the radial dimension of the locking structure 10, and can be more widely used in occasions with strict requirements for radial space dimensions.

[0072] In some embodiments, both the second locking member 2 and the first locking member 1 are ratchet wheels.

[0073] In some embodiments of this application, see Figures 1-5 As shown, the drive device 3 drives the second locking member 2 away from the first locking member 1 along the axial direction of the output shaft 401 so that the second locking member 2 unlocks the first locking member 1.

[0074] Specifically, the locking structure 10 is adapted to lock or unlock the output shaft 401 of the brake motor 40. The drive device 3 directly drives the second locking member 2 to move axially, and the second locking member 2 moves axially closer to the first locking member 1 so that the first locking member 1 and the second locking member 2 lock together. At this time, the output shaft 401 of the brake motor 40 is locked and cannot rotate. The second locking member 2 moves away from the first locking member 1 along the axial direction of the output shaft 401 so that the second locking member 2 unlocks the first locking member 1. At this time, the output shaft 401 of the brake motor 40 is unlocked and can rotate.

[0075] Thus, the locking and unlocking of the first locking member 1 by the second locking member 2 is realized. The operation process is simple, without the need for a complex transmission mechanism, reducing the power transmission links and shortening the response time. It can quickly lock or unlock the output shaft 401 of the brake motor 40, improving the working efficiency of the system.

[0076] In some embodiments of this application, see Figures 1-4 As shown, the second locking member 2 includes a tooth 21 located at the end of the second locking member 2 closest to the first locking member 1. When the second locking member 2 is driven by the driving device 3, the tooth 21 is adapted to lock or unlock the first locking member 1. Specifically, when the tooth 21 engages with the first locking member 1, the second locking member 2 locks the first locking member 1. Both the tooth 21 and the first locking member 1 have toothed structures, which can provide a large contact area and a reliable meshing effect. When the driving device 3 pushes the second locking member 2 to move, the tooth 21 can quickly and accurately engage or disengage with the first locking member 1, ensuring that the locking and unlocking actions of the output shaft 401 of the brake motor 40 are stable and efficient, and avoiding slippage or failure caused by poor contact between the second locking member 2 and the first locking member 1.

[0077] In some embodiments of this application, see Figures 1-4 As shown, the drive device 3 includes an electromagnetic drive component 33, which drives the second locking component 2 to move axially along the output shaft 401. Specifically, the electromagnetic drive component 33 has a fast response speed, enabling the second locking component 2 to move rapidly along the output shaft 401, thus achieving rapid locking and unlocking of the output shaft 401 of the brake motor 40. This significantly reduces the delay in the drive device 3 driving the second locking component 2, improving the safety and controllability of the locking structure 10.

[0078] In some embodiments of this application, see Figures 1-4 As shown, the second locking member 2 also includes a magnetizing part 23, and the electromagnetic driving member 33 includes a coil and a permanent magnet. When the coil is energized, it is adapted to magnetize the magnetizing part 23, and the permanent magnet is adapted to interact with the magnetizing part 23 so that the magnetizing part 23 moves axially in the output shaft 401.

[0079] Specifically, the magnetization intensity of the magnetization part 23 can be precisely controlled by the magnitude of the current in the coil, which, in conjunction with the magnetic field force of the permanent magnet, enables precise control over the moving speed and force of the second locking member 2, thereby ensuring the accuracy of the locking and unlocking actions of the first locking member 1 and the second locking member 2.

[0080] Meanwhile, the constant magnetic field of the permanent magnet can maintain a portion of the magnetic force even when the power is off, in order to attract the second locking member 2 and help maintain its position, for example, locking the second locking member 2 in a position such as... Figure 2 The upper limit position shown or as Figure 4 The lower limit position is shown. At this point, the coil does not need to be continuously energized; it is only energized when a state switch is required, further reducing energy consumption.

[0081] In some embodiments, the magnetized portion 23 is located at the end of the second locking member 2 that is away from the first locking member 1.

[0082] In some embodiments of this application, see Figures 1-4 As shown, the coil is located on the outer side of the magnetization section 23 in the radial direction of the output shaft 401. Specifically, the radially outer coil can be assembled as an independent component, layered with axial components such as the second locking member 2 and the first locking member 1. During production, the axial integration of the output shaft 401, the first locking member 1, and the second locking member 2 is completed first, and then the coil is radially inserted, simplifying the assembly process. During maintenance, the coil can be quickly disassembled for inspection without disassembling the axial core structure, reducing maintenance costs.

[0083] In some embodiments of this application, see Figures 1-4 , Figure 15 , Figure 16 As shown, the coil includes a first coil 331 and a second coil 332, the permanent magnet includes a first permanent magnet 333, and the magnetization part 23 includes a first magnetization part 231 and a second magnetization part 232. In the axial direction of the output shaft 401, the first coil 331 is located on the side of the second coil 332 away from the first locking member 1, the first permanent magnet 333 is located between the first coil 331 and the second coil 332, and the first magnetization part 231 is located on the side of the second magnetization part 232 away from the first locking member 1. Specifically, when the first coil 331 is energized, it is suitable for magnetizing the first magnetization part 231; when the second coil 332 is energized, it is suitable for magnetizing the second magnetization part 232; the first permanent magnet 333 is suitable for generating an attractive force on one of the first magnetization part 231 and the second magnetization part 232, and a repulsive force on the other, so that the magnetization part 23 moves in the axial direction of the output shaft 401. Therefore, by changing the direction of the current when the first coil 331 and the second coil 332 are energized, the first magnetized part 231 and the second magnetized part 232 can be driven by the first permanent magnet 333 to move in the same direction along the output shaft 401, thereby realizing the locking or unlocking of the first locking part 1 by the second locking part 2.

[0084] Meanwhile, the constant magnetic field of the first permanent magnet 333 can maintain a portion of the magnetic force even when the power is off, in order to attract the magnetized part 23 and help maintain the position of the magnetized part 23, for example, locking the magnetized part 23 in a position such as Figure 2 The upper limit position shown or as Figure 4 The lower limit position is shown. At this time, the first coil 331 or the second coil 332 does not need to be continuously energized, but is energized only when it is necessary to switch states, further reducing energy consumption.

[0085] In some embodiments of this application, see Figures 1-4 , Figure 15 , Figure 16 As shown, when the first coil 331 is energized, it is adapted to make the end of the first magnetized part 231 close to the first locking member 1 a first pole and the end away from the first locking member 1 a second pole. When the second coil 332 is energized, it is adapted to make the end of the second magnetized part 232 close to the first locking member 1 a second pole and the end away from the first locking member 1 a first pole. The first pole is one of the N-level and S-level poles, and the second pole is the other of the N-level and S-level poles. Specifically, the first coil 331 is energized to magnetize the first magnetized part 231, and the second coil 332 is energized to magnetize the second magnetized part 232. After the first magnetized part 231 and the second magnetized part 232 are magnetized, their magnetic poles at opposite ends are opposite. The first permanent magnet 333 can repel one of the first magnetized part 231 and the second magnetized part 232 and attract the other, forming a resultant force along the axial direction of the output shaft 401. This greatly enhances the driving force for driving the second locking member 2 to move axially, making the locking and unlocking actions faster and more powerful, thus meeting the fast locking and unlocking requirements of the locking structure 10.

[0086] For example Figure 15 As shown, the first pole is S-pole and the second pole is N-pole. The end of the first permanent magnet 333 near the first locking member 1 is S-pole and the end away from the first locking member 1 is N-pole. The first permanent magnet 333 drives the first magnetization part 231 and the second magnetization part 232 to move axially toward the first locking member 1 so that the second locking member 2 can lock the first locking member 1, thereby locking the output shaft 401.

[0087] For example Figure 16 As shown, the first pole is N-pole and the second pole is S-pole. The end of the first permanent magnet 333 near the first locking member 1 is S-pole and the end away from the first locking member 1 is N-pole. The first permanent magnet 333 drives the first magnetization part 231 and the second magnetization part 232 to move axially away from the first locking member 1 so that the second locking member 2 can unlock the first locking member 1, thereby unlocking the output shaft 401.

[0088] In some embodiments of this application, see Figures 1-4 , Figure 15 , Figure 16 As shown, the winding directions of the first coil 331 and the second coil 332 are opposite. Specifically, the opposite winding directions of the first coil 331 and the second coil 332 ensure that when the first coil 331 and the second coil 332 are supplied with current in the same direction, the magnetic field directions of the first coil 331 and the second coil 332 are opposite. This eliminates the need for separate power supply devices for the first coil 331 and the second coil 332; a single power supply device is sufficient to ensure that the first magnetized part 231 and the second magnetized part 232 move in the same direction after being magnetized. This reduces the complexity of the control logic of the locking structure 10, improves the stability and convenience of magnetic pole generation, and makes the drive control of the second locking member 2 simpler and more reliable.

[0089] In some embodiments of this application, see Figures 1-4 As shown, the electromagnetic drive 33 also includes an iron core, which is located on at least one side of the second locking member 2 in the axial direction of the output shaft 401. When the iron core is magnetized by the coil, it is suitable for driving the second locking member 2 to move along the axial direction of the output shaft 401.

[0090] In some embodiments not shown in the figures, the core includes a third core located on the side of the second locking member 2 away from the first locking member 1 in the axial direction of the output shaft 401.

[0091] In some embodiments not shown in the figures, the core includes a fourth core located on the side of the second locking member 2 axially along the output shaft 401 near the first locking member 1.

[0092] In some embodiments, see Figure 2 , Figure 4 As shown, the iron core includes at least a first iron core 334 and a second iron core 335. The first iron core 334 is located on the side of the second locking member 2 away from the first locking member 1, and the second iron core 335 is disposed on the side of the first iron core 334 closer to the first locking member 1. This is used as an example for illustration; other embodiments will not be described in detail.

[0093] Specifically, the first iron core 334 and the first magnetized part 231 are simultaneously magnetized by the first coil 331, so that the magnetic poles of the opposite ends of the first iron core 334 and the first magnetized part 231 are opposite, and the first iron core 334 and the first magnetized part 231 attract each other. At the same time, the second iron core 335 and the second magnetized part 232 are simultaneously magnetized by the second coil 332, so that the magnetic poles of the opposite ends of the second iron core 335 and the second magnetized part 232 are opposite, and the second iron core 335 and the second magnetized part 232 attract each other. Therefore, under the interaction of the first magnetized part 231, the second magnetized part 232, and the first permanent magnet 333, the second locking member 2 moves axially along the output shaft 401. Taking the movement of the second locking member 2 towards the first locking member 1 as an example, as the second locking member 2 moves, the distance between the first iron core 334 and the first magnetized part 231 increases, and the attraction force between the first iron core 334 and the first magnetized part 231 gradually decreases. The distance between the second iron core 335 and the second magnetized part 232 decreases, and the attraction force between the second iron core 335 and the second magnetized part 232 gradually increases. This causes the total electromagnetic driving force on the second locking member 2 to gradually increase, allowing the second locking member 2 to move quickly to the first locking member 1 and lock with it. Similarly, when the second locking member 2 moves away from the first locking member 1, its moving speed is also increased, thereby improving the locking and unlocking speed of the locking structure 10 on the first locking member 1.

[0094] In some embodiments of this application, see Figure 2 , Figure 4 As shown, the magnetized part 23 is adapted to abut against one of the first iron core 334 and the second iron core 335. Specifically, during the axial movement of the second locking member 2 on the output shaft 401, the magnetized part 23 can move to abut against one of the first iron core 334 and the second iron core 335, thereby stopping the movement of the second locking member 2 and achieving physical limitation of the second locking member 2, preventing the second locking member 2 from moving beyond its range.

[0095] In some embodiments of this application, the first iron core 334 and the second iron core 335 are spaced apart, and a moving space is formed between the first iron core 334 and the second iron core 335. The magnetizing part 23 is disposed in the moving space and can move along the axial direction of the output shaft 401.

[0096] In some embodiments of this application, see Figures 17-20As shown, the permanent magnet includes a second permanent magnet 336 and a third permanent magnet 337, and the coil includes a third coil 338. In the axial direction of the output shaft 401, the third coil 338 is located between the second permanent magnet 336 and the third permanent magnet 337. The third coil 338 is adapted to magnetize the magnetization part 23. After being magnetized, the magnetization part 23 is adapted to attract one of the second permanent magnet 336 and the third permanent magnet 337 and repel the other of the second permanent magnet 336 and the third permanent magnet 337, so that the magnetization part 23 can move along the axial direction of the output shaft 401.

[0097] Specifically, the third coil 338 is located between the second permanent magnet 336 and the third permanent magnet 337. When energized, it can directly magnetize the magnetized part 23. The second permanent magnet 336 and the third permanent magnet 337 act on the magnetized part 23, causing the magnetized part 23 to be subjected to an axial force of "attraction and repulsion" simultaneously. Compared with the attraction or repulsion force in one direction, this bidirectional force can be converted into axial driving force more efficiently, reducing energy loss and improving the axial movement efficiency of the second locking member 2.

[0098] In some embodiments of this application, see Figures 17-20 As shown, the second permanent magnet 336 and the third permanent magnet 337 have the same magnetic poles on opposite sides. Specifically, with Figure 20 In one embodiment, the side of the second permanent magnet 336 closest to the third permanent magnet 337 is the S pole, and the side of the third permanent magnet 337 closest to the second permanent magnet 336 is also the S pole. After the magnetized part 23 is magnetized, the end closest to the second permanent magnet 336 is the N pole (subject to attractive force), and the end closest to the third permanent magnet 337 is the S pole (subject to repulsive force). The combined force of the attractive and repulsive forces directly pushes the magnetized part 23 to move upward along the axial direction, so that the second locking member 2 is unlocked from the second locking member 1.

[0099] In some embodiments of this application, see Figures 1-4 As shown, the locking structure 10 includes a mounting frame 31, with the magnetized part 23 extending at least partially into the mounting frame 31, and the electromagnetic drive member 33 mounted within the mounting frame 31. Specifically, the mounting frame 31 serves as a support structure for the electromagnetic drive member 33 and the second locking member 2, enabling the installation and fixation of the electromagnetic drive member 33 and the second locking member 2. By partially extending the magnetized part 23 into the mounting frame 31, nested utilization of axial space is achieved, significantly shortening the overall axial dimension of the drive device 3 and avoiding excessive axial length of the equipment (e.g., the parking device 100 described below) due to the locking structure 10.

[0100] In some embodiments not shown in the figures, a portion of the magnetizing part 23 is located inside the fixing frame 31, while another portion extends out of the fixing frame 31 and connects to the toothed part 21. Specifically, by directly connecting the magnetizing part 23 to the toothed part 21, the axial dimension of the second locking member 2 on the output shaft 401 is shortened, reducing the space occupied.

[0101] In some embodiments, see Figure 2 As shown, the magnetizing part 23 is completely located within the mounting bracket 31. For example... Figures 1-4 As shown, the second locking member 2 also includes a connecting part 22, and the magnetizing part 23 is connected to the tooth part 21 through the connecting part 22.

[0102] The connecting part 22 can be made of metal materials such as steel, stainless steel, and aluminum alloy, or non-metallic materials such as nylon, polytetrafluoroethylene, plastic, and carbon fiber composite materials.

[0103] In some embodiments, the connecting portion 22 has a regular shape, for example, the connecting portion 22 is a cylindrical tube or a square tube, or the connecting portion 22 is generally a cylindrical tube or a square tube.

[0104] In some embodiments of this application, see Figures 1-4 As shown, the fixing frame 31 includes a first housing 32 and a winding drum 311. The winding drum 311 is disposed inside the first housing 32 and is fixedly connected to the first housing 32. The coil is wound on the winding drum 311.

[0105] Specifically, the winding drum 311 is fixedly connected to the first housing 32. The winding drum 311 provides rigid support for the coils (e.g., the first coil 331, the second coil 332, and the third coil 338) to prevent the coils from loosening or shifting due to vibration.

[0106] In some embodiments of this application, see Figures 1-4 As shown, the permanent magnet is mounted on the mounting bracket 31.

[0107] In some embodiments, the permanent magnet may be installed only on the winding drum 311.

[0108] In other embodiments, the permanent magnet may be mounted only on the first housing 32.

[0109] In some other embodiments, the permanent magnet can be installed on both the winding drum 311 and the first housing 32.

[0110] In some embodiments, the iron core is connected to the winding drum 311.

[0111] In some embodiments, the iron core is connected to the first housing 32.

[0112] In some other embodiments, the iron core may be installed simultaneously on the winding drum 311 and the first housing 32.

[0113] Optionally, the connection between the winding spool 311 and the first housing 32 can be an interference fit, a bolt connection, or an injection molding process.

[0114] In summary, the electromagnetic drive component 33 can be a bidirectional holding electromagnet.

[0115] In some embodiments of this application, see Figures 1-4 As shown, the fixing frame 31 includes an anti-rotation structure 312, which cooperates with the second locking member 2 to restrict the circumferential rotation of the second locking member 2. Specifically, the anti-rotation structure 312 prevents the rotation of the second locking member 2 by mechanically limiting it, forcing the second locking member 2 to move only axially. This prevents the output shaft 401 from still being able to rotate after the first locking member 1 and the second locking member 2 are locked, thus improving the reliability and safety of the locking structure 10.

[0116] In some embodiments of this application, see Figures 1-4 As shown, the outer peripheral wall of the cross-section along the radial direction of the output shaft 401 of the second locking member 2 is non-circular. The outer peripheral wall of the second locking member 2 is adapted to cooperate with the anti-rotation structure 312 to restrict the rotational freedom of the second locking member 2. Specifically, the non-circular cross-section and the mating surface of the anti-rotation structure 312 form mechanical interference, directly restricting the circumferential rotation of the second locking member 2. When the first locking member 1 and the second locking member 2 are locked, the output shaft 401 is locked.

[0117] In some embodiments, the non-circular cross-section can be a polygon, a D-shape, or a composite curve (e.g.) Figure 1 As shown, the shapes consist of straight line segments and circular arcs, spline shapes, keyway shapes, etc.

[0118] In some embodiments of this application, see Figures 1-4 As shown, the outer peripheral surface of the second locking member 2 includes a non-cylindrical surface, and the anti-rotation structure 312 includes a non-cylindrical hole surface. The non-cylindrical surface and the non-cylindrical hole surface are shaped to restrict the circumferential rotation of the second locking member 2. Specifically, the shape matching of the non-cylindrical surface and the non-cylindrical hole surface directly restricts the rotation of the second locking member 2 through the geometric structure. When the first locking member 1 and the second locking member 2 are locked, the output shaft 401 is locked.

[0119] In some embodiments of this application, see Figures 1-4 As shown, the anti-rotation structure 312 is a sleeve, which is disposed between the winding drum 311 and the second locking member 2. The non-cylindrical surface of the second locking member 2 cooperates with the non-cylindrical hole surface of the sleeve to restrict the circumferential rotation of the second locking member 2.

[0120] In some embodiments not shown in the figures, the second locking member 2 is provided with an anti-rotation engagement structure, which engages with the anti-rotation structure 312. One of the anti-rotation engagement structure and the anti-rotation structure 312 is an anti-rotation protrusion, and the other is an anti-rotation groove. Specifically, the engagement of the anti-rotation protrusion and the anti-rotation groove forms a tenon-and-mortise type axial lock, which can effectively prevent the second locking member 2 from rotating, thereby improving the stability and reliability of the first locking member 1 and the second locking member 2 when locked.

[0121] Alternatively, the anti-rotation structure 312 can also be a flat key structure, a guide rail, or a slider structure, etc. Further details will not be provided here.

[0122] Thus, the fixing frame 31 provides precise axial movement guidance for the magnetized part 23, restricts radial offset and rotational freedom, and prevents misalignment between the teeth 21 and the first locking member 1 due to vibration, ensuring locking reliability.

[0123] In some embodiments of this application, see Figure 5 As shown, the drive device 3 includes an electric drive component 34 and a first rotating component 35. The first rotating component 35 is sleeved on the outer peripheral surface of the second locking component 2. The electric drive component 34 drives the first rotating component 35 to rotate. When the first rotating component 35 rotates, it drives the second locking component 2 to move axially along the output shaft 401, so that the second locking component 2 locks or unlocks the first locking component 1. Specifically, when the electric drive component 34 rotates, it can drive the first rotating component 35 to rotate, thereby driving the second locking component 2 to move axially along the output shaft 401, so that the toothed part 21 locks or unlocks the first locking component 1. By adjusting the rotational speed and direction of the electric drive component 34, the speed and position of the second locking component 2 can be precisely controlled, realizing precise control of the first locking component 1 locking or unlocking the second locking component 2.

[0124] For example, the electric drive unit 34 can control the first rotating member 35 to rotate forward so that the second locking member 2 moves slowly toward the first locking member 1 to reduce the impact force. Alternatively, the electric drive unit 34 can control the first rotating member 35 to rotate in the opposite direction so that the second locking member 2 moves away from the first locking member 1, achieving rapid unlocking and retraction.

[0125] In some embodiments of this application, see Figure 5 As shown, the first rotating member 35 includes a first thread, and the second locking member 2 includes a second thread. The first thread and the second thread engage to drive the second locking member 2 to move axially along the output shaft 401 when the first rotating member 35 rotates. Specifically, the first thread and the second thread form a threaded pair. The engagement of the first rotating member 35 and the second locking member 2 through the threaded pair allows the rotational motion of the first rotating member 35 to be precisely converted into the axial motion of the second locking member 2. The screw drive has force amplification characteristics, and the electric drive member 34 only needs to output a small torque to generate a large axial thrust.

[0126] In some embodiments, the first thread and the second thread may be trapezoidal threads, rectangular threads, etc.

[0127] In some embodiments of this application, see Figure 5 As shown, the drive device 3 also includes a second housing 38, within which the electric drive component 34 and the first rotating component 35 are disposed. Specifically, the second housing 38 provides rigid support for the electric drive component 34 and the first rotating component 35, effectively reducing the vibration amplitude of the electric drive component 34 and the first rotating component 35, and withstanding the deformation caused by axial thrust, thereby ensuring that the accuracy of the meshing between the first thread and the second thread does not decrease.

[0128] In some embodiments of this application, see Figure 5 As shown, the electric drive unit 34 includes a stator 341 and a rotor 342. The rotor 342 is disposed on the outer peripheral wall of the first rotating member 35, and the stator 341 is disposed on the inner wall of the second housing 38. The rotor 342 can rotate relative to the stator 341 to drive the first rotating member 35 to rotate. Specifically, the stator 341 is mounted on the inner wall of the second housing 38, and the rotor 342 surrounds the outer side of the first rotating member 35. After the electric drive unit 34 is energized, the rotor 342 rotates synchronously with the first rotating member 35, which improves the transmission efficiency of the drive device 3. At the same time, the integration of the rotor 342 with the first rotating member 35 can reduce the moment of inertia, increase the angular acceleration, and shorten the response time of the drive device 3.

[0129] In some embodiments, the electric drive element 34 is a motor.

[0130] In some embodiments, the stator 341 is energized and the rotor 342 is a permanent magnet.

[0131] In some embodiments, the stator 341 is a permanent magnet, and the rotor 342 can be energized by brushes.

[0132] In some embodiments of this application, see Figure 5 As shown, the first rotating member 35 and the second locking member 2 can achieve thread self-locking. Specifically, when the electric drive member 34 is de-energized, the self-locking characteristic of the threaded pair automatically takes effect, maintaining the relative position of the second locking member 2 and the first rotating member 35 without the need for an additional locking mechanism. When the second locking member 2 locks the first locking member 1, even in environments with significant vibration, the stability and reliability of the locking between the second locking member 2 and the first locking member 1 can still be guaranteed. When the second locking member 2 unlocks the first locking member 1, even in environments with significant vibration, the position of the second locking member 2 can still be guaranteed not to wobble arbitrarily. For example... Figure 5 As shown, the second locking member 2 is a screw, and the first rotating member 35 is a first screw sleeve. When the driving force on the first rotating member 35 disappears, the screw and the first screw sleeve self-lock, so that the relative position of the screw and the first screw sleeve is fixed.

[0133] The essential condition for self-locking of a threaded pair is that the lead angle λ does not exceed the friction angle φv. Specifically, φv = arctan(μ / cosα), where μ is the coefficient of friction and α is the pressure angle. When λ ≤ arctan(μ / cosα), the axial force cannot drive the threaded pair to rotate. For example, in a standard thread, α = 60°, and both the screw and the first sleeve are made of steel, with a material friction coefficient μ = 0.1, the friction angle φv ≈ 11.3°. If the lead angle λ = 3°, then self-locking is inevitable.

[0134] Reference Figures 6-14 As shown, the parking device 100 according to the second aspect embodiment of this application includes the locking structure 10 described above.

[0135] According to the second aspect of the present application, the parking device 100 has a locking structure 10 that fully utilizes the axial space of the output shaft 401 of the brake motor 40 by arranging the drive device 3, the second locking member 2 and the first locking member 1 along the axial direction of the output shaft 401, thereby avoiding the occupation of the radial space around the brake motor 40. This makes the brake motor 40 and the locking structure 10 more compactly integrated in the radial direction of the brake motor 40, reduces the occupation of the radial space of the brake motor 40 by the locking structure 10, and is conducive to the miniaturization design of the radial dimension of the locking structure 10. It can be more widely used in occasions with strict requirements for radial space dimensions.

[0136] In some embodiments of this application, reference is made to Figures 6-14 As shown, the parking device 100 also includes a brake disc 20 and a brake motor 40. The brake motor 40 includes an output shaft 401. When the output shaft 401 rotates, it is adapted to clamp the brake disc 20 to limit wheel rotation. The first locking member 1 is adapted to be fixedly mounted on the output shaft 401. Specifically, the brake disc 20 is mounted on the wheel. When the output shaft 401 rotates, the brake disc 20 is clamped, specifically by the friction pad 30. The wheel is directly braked by the friction between the friction pad 30 and the brake disc 20. At the same time, the locking structure 10 (such as a bidirectional holding electromagnet + threaded self-locking) locks the output shaft 401, forming a double insurance of "friction braking + mechanical locking".

[0137] In the embodiment using the above-mentioned electric drive component 34 and first rotating component 35, when the vehicle 1000 is turned off or the power is cut off, the locking structure 10 can keep the brake disc 20 in a clamped state through its own self-locking function (e.g., threaded pair self-locking or electromagnet self-locking), thus eliminating the risk of parking failure.

[0138] In some embodiments, refer to Figures 6-14As shown, the parking device 100 also includes a friction plate 30. When the output shaft 401 rotates, it is adapted to drive the friction plate 30 to move so that the friction plate 30 clamps the brake disc 20. When the friction plate 30 clamps the brake disc 20, it is adapted to restrict the rotation of the wheel. The first locking member 1 is adapted to be fixedly mounted on the output shaft 401.

[0139] In some embodiments of this application, see Figure 14 As shown, the parking device 100 also includes a pusher 50 connected to the friction pad 30. The output shaft 401 rotates to drive the pusher 50 to move closer to or further away from the brake disc 20. When the pusher 50 moves closer to the brake disc 20, it is suitable for causing the friction pad 30 to clamp the brake disc 20. Specifically, when the pusher 50 moves towards the brake disc 20, it is suitable for causing the friction pad 30 to clamp the brake disc 20. By controlling the rotation angle of the output shaft 401, the displacement of the pusher 50 can be precisely adjusted, forming an efficient and precise transmission path, thereby precisely controlling the magnitude of the clamping force of the friction pad 30 on the brake disc 20.

[0140] In some embodiments, the pusher 50 further includes a second threaded sleeve 501 and a pusher plate 502.

[0141] In some embodiments of this application, see Figures 12-14 As shown, the parking device 100 also includes a transmission mechanism. One side of the transmission mechanism is connected to the output shaft 401, and the other side is connected to the pusher 50. The output shaft 401 rotates to drive the transmission mechanism, and the movement of the transmission mechanism is adapted to drive the pusher 50 to move. Specifically, the transmission mechanism can adapt to complex layout requirements; that is, when the output shaft 401 and the pusher 50 cannot be arranged coaxially, the transmission mechanism can still convert the rotational motion of the output shaft 401 into the linear motion of the pusher 50. At the same time, the transmission mechanism can achieve torque amplification through speed ratio design to meet the braking requirements of the parking device 100.

[0142] In some embodiments of this application, see Figures 12-14 As shown, the transmission mechanism includes a gear transmission assembly and a reversing transmission mechanism 70. The gear transmission assembly is connected to the output shaft 401, and the gear transmission assembly is connected to the pusher 50 via the reversing transmission mechanism 70. The gear transmission assembly drives the pusher 50 to move through the reversing transmission mechanism 70. Specifically, the gear transmission assembly can achieve high transmission efficiency and reduce energy loss. Furthermore, by designing the gear ratio, the small torque of the output shaft 401 can be converted into a large thrust of the pusher 50, meeting the high load requirements of the parking device 100. The reversing transmission mechanism 70 can convert the rotation of the output shaft 401 into linear movement of the pusher 50.

[0143] In some embodiments of this application, see Figures 12-14As shown, the gear transmission assembly includes a first gear 601, a second gear 602, and at least one intermediate gear 603. The first gear 601 is connected to the output shaft 401, which drives the first gear 601 to rotate. The second gear 602 is connected to the pusher 50 via a reversing transmission mechanism 70. When the second gear 602 rotates, it drives the pusher 50 to move via the reversing transmission mechanism 70. At least one intermediate gear 603 is adapted to drive the first gear 601 and the second gear 602 to transmit the power from the first gear 601 to the second gear 602. Specifically, the engagement of the first gear 601, the second gear 602, and at least one intermediate gear 603, by adding or removing the intermediate gear 603 or adjusting the number of teeth on each gear, can precisely match the torque of the brake motor 40 with the thrust required by the pusher 50 when parking, thus improving the versatility of the parking device 100. At the same time, the rigid meshing of the gear transmission ensures the stability of the torque transmission of the output shaft 401, avoiding the risk of parking failure due to torque attenuation.

[0144] In some embodiments, see Figure 14 As shown, the second gear 602 is mounted on the second gear shaft 6021, and the second gear shaft 6021 is rotatably mounted on the third housing 80.

[0145] In some embodiments, see Figure 14 As shown, the intermediate gear 603 is mounted on the intermediate gear shaft 6031, and the intermediate gear shaft 6031 is rotatably mounted on the third housing 80.

[0146] In some embodiments of this application, see Figure 14 As shown, the reversing transmission mechanism 70 includes a second rotating member 701 and a second moving member 702. The second rotating member 701 is connected to the second gear 602 so that the second rotating member 701 rotates when the second gear 602 rotates. The second moving member 702 is connected to the pushing member 50, and the second rotating member 701 and the second moving member 702 are mutually driven. When the second rotating member 701 rotates, it is suitable for driving the second moving member 702 and the pushing member 50 to move. Specifically, the cooperation between the second rotating member 701 and the second moving member 702 realizes the conversion from rotation to linear motion. By controlling the rotation angle of the second rotating member 701, the displacement accuracy of the second moving member 702 can be controlled, thereby achieving controllable movement distance of the pushing member 50 and improving the control of the braking effect of the friction plate 30 and the brake disc 20.

[0147] In some embodiments, one of the second rotating member 701 and the second moving member 702 is a lead screw and the other is a nut.

[0148] In some embodiments, the second rotating member 701 and the second gear 602 may be integrally formed.

[0149] For example Figure 14 As shown, the second rotating component 701 is a nut, the second moving component 702 is a lead screw, and the second rotating component 701 and the second gear 602 are integrated into one piece or fixedly installed as one piece.

[0150] In some embodiments of this application, see Figure 12 , Figure 13 As shown, the brake motor 40 also includes a drive body 402, which is connected to the output shaft 401. The drive body 402 is adapted to drive the output shaft 401 to rotate. The parking device 100 also includes a transmission mechanism, through which the output shaft 401 is connected to the brake disc 20.

[0151] In some embodiments, see Figure 12 As shown, the locking structure 10 is located between the transmission mechanism and the drive body 402.

[0152] In some embodiments, see Figure 13 As shown, the locking structure 10 is located on the side of the drive body 402 away from the transmission mechanism.

[0153] Specifically, the locking structure 10 can be flexibly arranged on either side of the drive body 402 in the axial direction of the output shaft 401 according to actual usage requirements, avoiding the waste of radial space. At the same time, the locking structure 10 partially overlaps with the output shaft 401 in the axial direction, which reduces the space occupied by the locking structure 10 in the axial direction, optimizes the spatial layout of the parking device 100, and improves the practicality of the parking device 100.

[0154] In some embodiments of this application, see Figure 6 , Figure 7 As shown, the drive unit 3 also includes a first housing 32, and the parking device 100 also includes a third housing 80. The transmission mechanism is disposed within the third housing 80, and the first housing 32 is connected to the third housing 80. Specifically, the connection between the first housing 32 and the third housing 80 allows the drive unit 3 to be effectively mounted on the third housing 80, ensuring the stability of the second locking member 2 when locked to the first locking member 1, and preventing the second locking member 2 from failing to lock to the first locking member 1 due to vibration of the drive unit 3.

[0155] In some embodiments, the connection between the first housing 32 and the third housing 80 can be a bolt connection, a snap-fit ​​connection, a rivet connection, etc.

[0156] For example Figure 6 , Figure 7 As shown, the third housing 80 has a positioning post 801, the first housing 32 is fixed to the positioning post 801 of the third housing 80, and the first housing 32 and the third housing 80 are connected by bolts.

[0157] In some embodiments of this application, see Figure 14 As shown, the parking device 100 also includes a controller 901, which is adapted to be connected to the locking structure 10 and is used to control the locking structure 10. Specifically, when parking, the brake motor 40 controls the pusher 50 to push the friction pad 30 to press against the brake disc 20, thereby applying braking force to the brake disc 20 and braking the wheels. The controller 901 controls the locking structure 10 to lock the output shaft 401. When releasing the parking space, the controller 901 controls the locking structure 10 to release the output shaft 401, and the brake motor 40 moves the pusher 50 away from the brake disc 20, ensuring smooth operation and reducing component wear. When the wheels rotate, the friction pad 30 can separate from the brake disc 20.

[0158] In some embodiments, see Figure 14 As shown, the parking device 100 also includes a controller 901, which is disposed within the third housing 80. The controller 901 is adapted to be connected to the brake motor 40 and the locking structure 10, and is used to control the brake motor 40 and the locking structure 10. Specifically, the controller 901 is directly connected to the brake motor 40 and the locking structure 10, enabling linkage control of braking and locking. When parking, the brake motor 40 first controls the pusher 50 to push the friction pad 30 to press against the brake disc 20, thereby applying braking force to the brake disc 20 and braking the wheels. Then, the locking structure 10 is controlled to lock the output shaft 401. When releasing the parking device, the locking structure 10 is first controlled to release the output shaft 401, and then the brake motor 40 is controlled to move the pusher 50 away from the brake disc 20, ensuring smooth operation and reducing component wear.

[0159] In some embodiments of this application, see Figure 14 As shown, the controller 901 includes a control unit and a data acquisition unit. A detection element is located at the end of the output shaft 401 furthest from the drive body 402. The data acquisition unit is adapted to acquire the rotation angle of the output shaft 401 through the detection element. Specifically, the data acquisition unit converts the mechanical rotation of the output shaft 401 into an electrical signal through the detection element, which can accurately quantify the rotation angle and direction of the output shaft 401, providing a more detailed reflection of the real-time position of the output shaft 401 and offering precise data support for the control unit.

[0160] In some embodiments, the object being tested may be a gear tooth detector, a radial magnet, or the like.

[0161] In some embodiments of this application, see Figure 14As shown, the parking device 100 also includes a force sensor 902, which detects the thrust of the pusher 50 on the friction plate 30. The force sensor 902 is electrically connected to the controller 901. Specifically, the force sensor 902 converts the thrust of the pusher 50 on the friction plate 30 into an electrical signal. The controller 901 can obtain accurate values ​​of the braking torque in real time, providing direct data support for precise control of the operation of the brake motor 40 and the locking and unlocking of the output shaft 401. When insufficient thrust is detected (such as increased clearance due to wear of the friction plate 30), the controller 901 automatically increases the drive current of the brake motor 40 to compensate for the thrust attenuation. When the vehicle 1000 is released from parking, the controller 901 determines the separation state of the friction plate 30 based on the thrust attenuation rate to avoid damage to components during braking.

[0162] In some embodiments, the force sensor 902 is disposed on the pusher 50.

[0163] In some embodiments, a force sensor 902 is disposed on a second moving member 702.

[0164] In some embodiments, see Figure 14 As shown, a second bearing 903 is fitted on the outer peripheral surface of the second moving part 702, and the force sensor 902 abuts against the side of the second bearing 903 away from the brake disc 20.

[0165] Optionally, the second bearing 903 may be a thrust needle roller bearing capable of transmitting axial thrust.

[0166] In some embodiments, see Figure 14 As shown, the parking device 100 also includes a clamp body 904, which is connected to the third housing 80. The pusher 50, friction pad 30, and brake disc 20 are all disposed in the clamp body 904.

[0167] Reference Figure 21 As shown, the parking system 200 according to a third aspect embodiment of this application includes the parking device 100 described above.

[0168] According to the third aspect of the present application, the parking system 200 has a parking device 100 whose locking structure 10 fully utilizes the axial space of the output shaft 401 of the brake motor 40 by arranging the drive device 3, the second locking member 2 and the first locking member 1 along the axial direction of the output shaft 401, avoiding the occupation of the radial space around the brake motor 40. This makes the brake motor 40 and the locking structure 10 more compactly integrated in the radial direction of the brake motor 40, reduces the occupation of the radial space of the brake motor 40 by the locking structure 10, and is conducive to the miniaturization design of the radial dimension of the locking structure 10. It can be more widely used in occasions with strict requirements for radial space dimensions.

[0169] Reference Figure 22 , Figure 23 As shown, the vehicle 1000 according to the fourth aspect of this application includes the parking device 100 described above, or the parking system 200 described above.

[0170] According to the fourth aspect of the present application, the vehicle 1000 has a parking device 100 whose locking structure 10 fully utilizes the axial space of the output shaft 401 of the brake motor 40 by arranging the drive device 3, the second locking member 2 and the first locking member 1 along the axial direction of the output shaft 401, thereby avoiding the occupation of the radial space around the brake motor 40. This makes the brake motor 40 and the locking structure 10 more compactly integrated in the radial direction of the brake motor 40, reduces the occupation of the radial space of the brake motor 40 by the locking structure 10, and is conducive to the miniaturization design of the radial dimension of the locking structure 10. It can be more widely used in occasions with strict requirements for radial space dimensions.

[0171] The following is an example of a specific embodiment. The parking device 100 includes a third housing 80, a locking structure 10, a first gear 601, an intermediate gear 603 (which may be multiple gears or a double gear), a second gear 602, a brake motor 40, a detected component, a controller 901, an intermediate gear shaft 6031, a second gear shaft 6021, a clamp body 904, a force sensor 902, a thrust needle roller bearing, a second moving component 702, a second threaded sleeve 501, a push plate 502, a friction plate 30, a positioning post 801, a second coil 332, a first coil 331, a first permanent magnet 333, a first housing 32, a second locking component 2, a first locking component 1 (e.g., with a ratchet on the upper end), a winding spool 311, and an anti-rotation structure 312 (e.g., a sleeve). The second locking component 2 includes a hollow shaft and teeth 21, for example, the lower end of the teeth 21 is a ratchet, and the hollow shaft is a combination of a connecting part 22 and a magnetizing part 23.

[0172] Reference Figures 1-4 As shown, the locking structure 10 is a bidirectional retaining hollow locking structure, which consists of a first housing 32, a second coil 332, a first coil 331, a first iron core 334, a second iron core 335, a first permanent magnet 333, a winding drum 311, a second locking member 2 (magnetizing part 23, connecting part 22, and toothed part 21), a first locking member 1, and an anti-rotation structure 312. Because the winding directions of the second coil 332 and the first coil 331 are opposite, the magnetic forces generated by the two coils when energized are also in opposite directions. Figure 2 , Figure 15When energized, the upper half of the first coil 331 is the N pole and the lower half is the S pole, and the upper half of the first permanent magnet 333 is the N pole and the lower half is the S pole. The first coil 331 and the first permanent magnet 333 attract each other. The upper half of the second coil 332 is the S pole and the lower half is the N pole, and the second coil 332 and the first permanent magnet 333 repel each other. When energized, under the action of the first coil 331, the first coil 331 is suitable for magnetizing the first magnetized part 231, and when the second coil 332 is energized, it is suitable for magnetizing the second magnetized part 232. The upper half of the first magnetized part 231 is the N pole. The lower half of the first magnetization part 231 is the S pole, and the upper half of the second magnetization part 232 is the S pole and the lower half is the N pole. The first magnetization part 231 and the first permanent magnet 333 attract each other, while the second magnetization part 232 and the first permanent magnet 333 repel each other. The second iron core 335 is also magnetized by the second coil 332 to form an upper half as the S pole and a lower half as the N pole. The second iron core 335 and the second magnetization part 232 attract each other, further enhancing the downward thrust of the second magnetization part 232. As a result, the magnetization part 232 moves toward the first locking member 1 so that the tooth part 21 locks with the first locking member 1.

[0173] Similarly, such as Figure 4 , Figure 16 As shown, when energized, the upper half of the first coil 331 is the S pole and the lower half is the N pole, and the upper half of the second coil 332 is the N pole and the lower half is the S pole. Under the action of the first coil 331, the first coil 331 is suitable for magnetizing the first magnetized part 231, and when the second coil 332 is energized, it is suitable for magnetizing the second magnetized part 232. Specifically, the upper half of the first magnetized part 231 is the S pole and the lower half is the N pole, and the upper half of the second magnetized part 232 is the N pole and the lower half is the S pole. The first magnetized part 231 repels the first permanent magnet 333, while the second magnetized part 232 attracts the first permanent magnet 333. The first iron core 334 is magnetized by the first coil 331 to form an upper half as the S pole and a lower half as the N pole. The first iron core 334 attracts the first magnetized part 231, further enhancing the phase thrust of the first magnetized part 231. As a result, the magnetized part 23 moves away from the first locking member 1, so that the tooth part 21 unlocks from the first locking member 1.

[0174] Taking the movement of the second locking member 2 toward the first locking member 1 as an example, the closer the second magnetized part 232 is to the second iron core 335, the more the second coil 332 magnetizes the second magnetized part 232, the stronger the magnetic field of the second magnetized part 232, the greater the overall thrust on the second magnetized part 232, and the shorter the stroke of the second locking member 2. Therefore, in actual use, it is necessary to balance the relationship between the formation and the thrust.

[0175] When the locking structure 10 is de-energized, the first housing 32 becomes magnetic under the action of the first permanent magnet 333. The first housing 32 and the first permanent magnet 333 together exert an axial attraction on the second locking member 2, which increases the force on the second locking member 2. At the same time, since the first permanent magnet 333 remains stationary, it always exerts a radial attraction on the second locking member 2. Therefore, when the locking structure 10 is de-energized, the second locking member 2 always remains in the extended or retracted state under the action of the first permanent magnet 333.

[0176] like Figure 5 , Figure 6 As shown, the locking structure 10 is positioned on the positioning post 801 of the third housing 80. The output shaft 401 of the brake motor 40 passes through the toothed part 21, the connecting part 22, and the magnetized part 23. The toothed part 21 is fixed to the connecting part 22, and the magnetized part 23 is also fixed to the connecting part 22. The first locking member 1 is fixed to the output shaft 401 of the brake motor 40. Figure 1 , Figure 3 As shown, the magnetized part 23 has an irregular anti-rotation design. When the magnetized part 23 is engaged with the anti-rotation structure 312, the magnetized part 23 cannot rotate circumferentially and can only be pushed out and retracted axially. When the locking structure 10 is working, the magnetized part 23 is pushed out, and the teeth 21 engage with the first locking member 1. At this time, the brake motor 40 is locked and is in a parking state. When the locking structure 10 is energized in the reverse direction, the magnetized part 23 is retracted, and the teeth 21 are also retracted. The first locking member 1 is no longer restricted at this time, and the output shaft 401 of the brake motor 40 can rotate normally, thus releasing the parking state.

[0177] like Figure 14As shown, when the pushing member 50 of the parking device 100 requires a certain pushing force, the acquisition unit (e.g., an angle sensor) on the controller 901 identifies the detected component above the output shaft 401 of the brake motor 40. The controller 901 drives the brake motor 40 to start outputting torque and speed. The brake motor 40 drives the first gear 601 to rotate, which is transmitted to the second gear 602 through the intermediate gear 603. The second gear 602 is integrated with the second rotating member 701. The rotation of the second gear 602 drives the second moving member 702 to rotate. At this time, the second sleeve 501 is pushed out. Under the action of the second sleeve 501, the pusher 502 pushes the friction plate 30 (or brake pad) to clamp the brake disc 20, forming braking. The force sensor 902 above the second moving member 702 can detect the pushing force of the pusher 502 in real time and feed it back to the controller 901, forming a closed-loop control. When the parking force meets the target requirement, the controller 901 drives the locking structure 10, which pushes out the second locking member 2 so that the teeth 21 engage with the first locking member 1 and lock. At this time, the locking structure 10 is de-energized. Due to the presence of the first permanent magnet 333, the second locking member 2 is always in the pushed-out state. Simultaneously, the brake motor 40 is de-energized and no longer provides output torque to the parking device 100. At this time, the parking force of the parking device 100 remains constant because the output shaft 401 is locked. The parking device 100 is in the parking state. When the locking structure 10 is energized in the reverse direction, the second locking member 2 retracts in the reverse direction, and the teeth 21 separates from the first locking member 1. When the locking structure 10 is de-energized again, the teeth 21 and the first locking member 1 remain in the separated state due to the presence of the first permanent magnet 333. At this time, the brake motor 40 is controlled to reverse, releasing the clamping force between the friction plate 30 and the brake disc 20. The parking state is then released.

[0178] Also, in some embodiments, see Figure 13 As shown, the locking structure 10 can be installed at the tail of the brake motor 40 (i.e., the transmission mechanism and the locking structure 10 are located on both sides of the brake motor 40 respectively). Similarly, the height difference between the gear trains can be used for installation, so as to make use of the axial space of the parking device 100 and facilitate the arrangement.

[0179] See Figure 5As shown, in another specific embodiment, the locking structure 10 includes a driving device 3, a first locking member 1, and a second locking member 2. The driving device 3 includes a first housing 32, a stator 341, a rotor 342, a first bearing 36, and a first rotating member 35. The stator 341 of the drive unit 3 is fixed on the second housing 38, while the rotor 342 is a hollow structure. A first rotating component 35 is installed inside the rotor 342. The first rotating component 35 can rotate forward or backward with the rotor 342. Two first bearings 36 are designed at the front and rear of the first rotating component 35 for positioning, so that the first rotating component 35 is rotatably set in the second housing 38 to prevent the first rotating component 35 from deflecting during movement. The forward or reverse rotation of the first rotating component 35 can convert the rotational motion of the drive unit 3 into the direct pushing motion of the second locking component 2, which can realize the two actions of the second locking component 2 being pushed out and retracted. The second locking component 2 is also designed as a hollow structure, and the second locking component 2 can also achieve the overall axial arrangement. At the same time, the second locking component 2 and the first rotating component 35 can be designed as a self-locking mechanism. Therefore, after the rotor 342 of the drive unit 3 pushes out the second locking component 2 in the forward rotation and the power is cut off, the second locking component 2 can still provide holding force to prevent it from retracting, so that the parking device 100 is always in the parking state. Similarly, when the rotor 342 of the drive unit 3 reverses, the parking state is released, the second locking member 2 retracts, and after power is cut off, the self-locking ability of the second locking member 2 can also provide holding force, so the parking device 100 will not fail due to vibration.

[0180] Therefore, this application relates to a hollow electromechanical parking solution, including a locking structure 10, a transmission mechanism, a brake motor 40, a brake disc 20, a friction pad 30, a pusher 50, and a third housing 80. The locking structure 10 includes an electromagnetic drive 33, a first locking member 1, and a second locking member 2. The first housing 32 is fixed to the third housing 80; the gear 21 is fixed to the connecting part 22, the magnetized part 23 is fixed to the outer peripheral surface of the connecting part 22, and the first locking member 1 is fixed to the motor output shaft 401. The connecting part 22 and the magnetized part 23 are both integrated on the fixing frame 31 of the drive device 3, which can realize two actions: the second locking member 2 being pushed out and retracted. When the second locking member 2 is pushed out, the gear 21 and the first locking member 1 cooperate with each other and lock; since the first locking member 1 is fixed to the output shaft 401, the output shaft 401 is restricted from rotating, the first gear 601 cannot continue to transmit torque, and the parking device 100 is in a parking state. When the second locking member 2 retracts, the gear 21 disengages from the first locking member 1, and the output shaft 401 can continue to rotate. At this time, the parking state is released.

[0181] The structure of this application is simple, consisting only of a drive device 3, a first locking component 1, and a second locking component 2, without the need for additional transmission mechanisms, preload springs, etc.

[0182] The arrangement of the scheme in this application is convenient. The second locking member 2 is a hollow shaft design, which can directly pass through the output shaft 401, so that the drive device 3, the tooth 21, and the first locking member 1 can be arranged axially without any other radial arrangement, which can greatly reduce the volume of the locking structure 10.

[0183] The parking device 100 of this application does not have an additional transmission mechanism. The second locking element 2 can be directly integrated into the output shaft 401, and there is no need to design an additional preload spring. The overall assembly of the drive device 3 is simpler and more convenient.

[0184] The structure of this application can utilize the axial height difference between the first gear 601 and the second gear 602 to arrange the locking structure 10. It can be arranged at both ends of the brake motor 40 (both ends in the axial direction of the output shaft 401). The locking structure 10 is flexible in arrangement and makes perfect use of the axial space of the parking device 100.

[0185] This application incorporates an additional anti-rotation structure 312 to prevent the second locking element 2 from deflecting in the complex vibration environment around the wheel, which could cause the parking device 100 to fail.

[0186] In summary, the locking structure 10 of this application has advantages such as flexible arrangement, simple structure, convenient installation, and reduced radial arrangement space.

[0187] 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.

[0188] 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.

[0189] 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.

[0190] 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 locking structure (10), characterized in that, The locking structure (10) includes: The first locking member (1) is adapted to be fixedly mounted on the output shaft (401) of the brake motor (40); Second locking element (2); A drive device (3) is provided, wherein the drive device (3), the second locking member (2), and the first locking member (1) are arranged along the axial direction of the output shaft (401). The drive device (3) is used to drive the second locking member (2) to move along the axial direction of the output shaft (401) so that the second locking member (2) locks the first locking member (1) to limit the rotation of the output shaft (401).

2. The locking structure (10) according to claim 1, characterized in that, The driving device (3) drives the second locking member (2) away from the first locking member (1) along the axial direction of the output shaft (401) so that the second locking member (2) unlocks the first locking member (1).

3. The locking structure (10) according to claim 2, characterized in that, The second locking member (2) includes a tooth (21) located at one end of the second locking member (2) near the first locking member (1). When the second locking member (2) is driven by the driving device (3), the tooth (21) is adapted to lock or unlock the first locking member (1).

4. The locking structure (10) according to claim 1, characterized in that, The driving device (3) includes an electromagnetic drive (33) for driving the second locking member (2) to move axially along the output shaft (401).

5. The locking structure (10) according to claim 4, characterized in that, The second locking member (2) also includes a magnetizing part (23); The electromagnetic drive unit (33) includes: A coil, which is adapted to magnetize the magnetizing part (23) when energized; A permanent magnet adapted to interact with the magnetized part (23) to move the magnetized part (23) axially on the output shaft (401).

6. The locking structure (10) according to claim 5, characterized in that, The coil is located outside the magnetization section (23) in the radial direction of the output shaft (401).

7. The locking structure (10) according to claim 6, characterized in that, The coil includes a first coil (331) and a second coil (332), and the permanent magnet includes a first permanent magnet (333). In the axial direction of the output shaft (401), the first coil (331) is located on the side of the second coil (332) away from the first locking member (1), and the first permanent magnet (333) is located between the first coil (331) and the second coil (332).

8. The locking structure (10) according to claim 7, characterized in that, The first coil (331) and the second coil (332) are wound in opposite directions.

9. The locking structure (10) according to claim 7, characterized in that, The electromagnetic drive (33) further includes an iron core located on at least one side of the second locking member (2) in the axial direction of the output shaft (401), and the iron core is adapted to drive the second locking member (2) to move axially along the output shaft (401) when magnetized by the coil.

10. The locking structure (10) according to claim 9, characterized in that, The iron core includes at least a first iron core (334) and a second iron core (335), the first iron core (334) being located on the side of the second locking member (2) away from the first locking member (1), and the second iron core (335) being disposed on the side of the first iron core (334) close to the first locking member (1).

11. The locking structure (10) according to claim 10, characterized in that, The magnetized part (23) is adapted to abut against one of the first iron core (334) and the second iron core (335).

12. The locking structure (10) according to claim 5, characterized in that, The permanent magnet includes a second permanent magnet (336) and a third permanent magnet (337), and the coil includes a third coil (338) located between the second permanent magnet (336) and the third permanent magnet (337) in the axial direction of the output shaft (401).

13. The locking structure (10) according to claim 12, characterized in that, The second permanent magnet (336) and the third permanent magnet (337) have the same magnetic poles on opposite sides.

14. The locking structure (10) according to claim 5, characterized in that, The locking structure (10) includes a fixing frame (31), the magnetized part (23) extends at least partially into the fixing frame (31), and the electromagnetic drive (33) is installed in the fixing frame (31).

15. The locking structure (10) according to claim 14, characterized in that, The fixing frame (31) includes: First shell (32); A winding spool (311) is disposed inside the first housing (32). The winding spool (311) is fixedly connected to the first housing (32), and the coil is wound on the winding spool (311).

16. The locking structure (10) according to claim 14, characterized in that, The permanent magnet is mounted on the fixing frame (31).

17. The locking structure (10) according to claim 14, characterized in that, The fixing frame (31) includes an anti-rotation structure (312), which cooperates with the second locking member (2) to restrict the circumferential rotation of the second locking member (2).

18. The locking structure (10) according to claim 17, characterized in that, The outer peripheral wall of the second locking member (2) in the radial section along the output shaft (401) is formed as non-circular, and the outer peripheral wall of the second locking member (2) is adapted to cooperate with the anti-rotation structure (312) to restrict the rotational freedom of the second locking member (2).

19. The locking structure (10) according to claim 2, characterized in that, The driving device (3) includes: Electric drive components (34); The first rotating member (35) is sleeved on the outer peripheral surface of the second locking member (2). The electric drive member (34) is used to drive the first rotating member (35) to rotate. When the first rotating member (35) rotates, it drives the second locking member (2) to move along the axial direction of the output shaft (401) so that the second locking member (2) locks or unlocks the first locking member (1).

20. The locking structure (10) according to claim 19, characterized in that, The first rotating member (35) includes a first thread, and the second locking member (2) includes a second thread. The first thread engages with the second thread to drive the second locking member (2) to move axially along the output shaft (401) when the first rotating member (35) rotates.

21. The locking structure (10) according to claim 19, characterized in that, The drive device (3) further includes a second housing (38), and the electric drive component (34) and the first rotating component (35) are disposed inside the second housing (38).

22. The locking structure (10) according to any one of claims 19-21, characterized in that, The first rotating member (35) and the second locking member (2) can achieve thread self-locking.

23. A parking device (100), characterized in that, include: The locking structure (10) according to any one of claims 1-22.

24. The parking device (100) according to claim 23, characterized in that, The parking device (100) also includes: Brake disc (20); A brake motor (40) includes an output shaft (401) which is adapted to clamp the brake disc (20) to limit wheel rotation when the output shaft (401) rotates, and a first locking member (1) is adapted to be fixedly disposed on the output shaft (401).

25. The parking device (100) according to claim 24, characterized in that, The brake motor (40) further includes a drive body (402), which is connected to the output shaft (401) and is adapted to drive the output shaft (401) to rotate. The parking device (100) further includes a transmission mechanism, and the output shaft (401) is connected to the brake disc (20) via the transmission mechanism. The locking structure (10) is located between the transmission mechanism and the drive body (402), or the locking structure (10) is located on the side of the drive body (402) away from the transmission mechanism.

26. The parking device (100) according to claim 23, characterized in that, The parking device (100) also includes: A controller (901) adapted to be connected to the locking structure (10) and used to control the locking structure (10).

27. A parking system (200), characterized in that, include: The parking device (100) according to any one of claims 23-26.

28. A vehicle (1000), characterized in that, include: The parking device (100) according to any one of claims 23-26, or the parking system (200) according to claim 27.

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