Braking device, braking system and vehicle

Abstract

This invention discloses a braking device, a braking system, and a vehicle. The braking device includes a housing, an execution module, a magnetic lead screw, a drive module, and a self-locking module. The execution module is used to perform braking. The magnetic lead screw includes a lead screw rotor and a lead screw mover, which rotate in conjunction. The lead screw mover is adapted to generate a magnetic force with the lead screw rotor when the lead screw rotor rotates, thereby driving the lead screw mover to switch between a braking position and a release position. The drive module is used to drive the lead screw rotor to rotate. The self-locking module includes a torque-reducing and speed-increasing component and a braking component. In the braking device of this invention, when the lead screw rotor rotates, the lead screw mover can be driven to slide through magnetic force, thereby achieving braking. The magnetic interaction avoids friction and wear caused by contact, resulting in high reliability of the braking device. The torque-reducing and speed-increasing component reduces the torque required by the braking component, thus reducing energy consumption.

Description

Technical Field

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

[0002] Traditional hydraulic braking systems typically include a master cylinder, brake fluid, brake fluid lines, a brake cylinder, and a brake actuator. When operating, the master cylinder delivers brake fluid to the brake cylinder via the brake fluid lines. The brake fluid then drives the piston in the brake cylinder, which in turn drives the brake actuator to generate braking torque. This type of hydraulic braking system suffers from problems such as numerous brake fluid lines, high maintenance costs, and the potential for brake failure due to brake fluid leakage. Against this backdrop, technicians in related fields have developed electromechanical braking systems.

[0003] Existing electromechanical braking devices generally include a motor, a mechanical transmission mechanism, and a braking actuation module. When operating, the motor serves as the braking force source, which is applied to the braking actuation module via the mechanical transmission mechanism. The actuation module then generates braking torque to achieve braking. Furthermore, to facilitate the integration of parking functions, electromechanical braking systems typically include a power-off brake, which locks the motor spindle, keeping the brake in a braking state. Compared to traditional hydraulic braking systems, this type of electromechanical braking system offers advantages such as complete decoupling of the brake pedal, fast braking torque response, and high control precision.

[0004] However, the existing electromechanical braking systems still have the following problems: mechanical transmission components inevitably suffer from mechanical friction, wear, aging, and mechanical jamming, resulting in low overall reliability of the braking device; power failure brakes require a large locking torque, resulting in high overall energy consumption of the braking device and requiring a large space. Summary of the Invention

[0005] This invention is based on the inventor's discovery and understanding of the following facts and problems: existing electromechanical braking devices have low overall reliability due to problems such as friction, wear, aging and mechanical jamming in the mechanical transmission components; and the power failure brake requires a large torque to lock the motor spindle, resulting in a large braking device with high energy consumption.

[0006] The present invention aims to at least partially solve one of the technical problems in the related art.

[0007] To address this issue, this invention provides a braking device that solves the problems of low reliability, large size, and high energy consumption of existing electromechanical braking devices.

[0008] This invention also proposes a braking system.

[0009] The present invention also proposes a vehicle.

[0010] The braking device of this invention includes a housing, an execution module, a magnetic lead screw, and a drive module. The execution module is connected to the housing and is used to perform braking. The magnetic lead screw includes a lead screw rotor and a lead screw mover. The lead screw mover is slidably mounted in the housing and has a braking position and a release position. In the braking position, the lead screw mover acts on the execution module to brake the execution module. In the release position, the braking of the execution module is released. The lead screw rotor and the lead screw mover are rotatably engaged. The lead screw mover is adapted to generate a magnetic force with the lead screw rotor when the lead screw rotor rotates, so as to drive the lead screw mover to switch between the braking position and the release position. The drive module is disposed in the housing and is used to drive the lead screw rotor to rotate.

[0011] In this embodiment of the braking device, the lead screw actuator is slidably mounted within the housing. During its sliding stroke, the lead screw actuator has a braking position and a release position. When the lead screw actuator slides to the braking position, it acts on the execution module, causing the execution module to perform braking. The lead screw rotor rotates in conjunction with the lead screw actuator, and the lead screw rotor is driven to rotate by the drive module. When the lead screw rotor rotates, it can drive the lead screw actuator to slide through magnetic force, thereby achieving braking. During transmission, the lead screw rotor and lead screw actuator interact magnetically, avoiding friction and wear caused by contact, and preventing the lead screw rotor and lead screw actuator from jamming, resulting in high reliability of the braking device.

[0012] In some embodiments, the braking device includes a self-locking module, the self-locking module including a torque-reducing and speed-increasing component and a braking component, the torque-reducing and speed-increasing component being connected between the braking component and the drive module, the braking component being adapted to lock the drive module, and the torque-reducing and speed-increasing component being adapted to amplify the torque exerted by the braking component on the drive module.

[0013] In some embodiments, the drive module includes a first rotor, a second rotor, and a first stator. The first rotor is connected to the torque reduction and speed increase component, and at least a portion of the torque reduction and speed increase component can rotate synchronously with the first rotor. The second rotor is rotatably mounted on the outer periphery of the first rotor, and when the drive module is in operation, the rotational speed of the first rotor is greater than the rotational speed of the second rotor. The second rotor is connected to the lead screw rotor, and the first stator is disposed within the housing and surrounds the outer periphery of the second rotor.

[0014] In some embodiments, the drive module includes a first permanent magnet array, a second permanent magnet array, and a first adjusting ring. The first permanent magnet array is disposed on the first rotor, the second permanent magnet array is disposed on the first stator, and the first adjusting ring is disposed on the second rotor. The first adjusting ring surrounds the outer periphery of the first permanent magnet array, and the second permanent magnet array surrounds the outer periphery of the first adjusting ring.

[0015] In some embodiments, the torque reduction and speed increase assembly includes a third rotor, a fourth rotor, a third permanent magnet array, a fourth permanent magnet array, and a second adjusting magnetic ring. The third rotor is connected to the braking assembly. The third permanent magnet array is disposed on the third rotor. The fourth rotor is anti-rotationally assembled with the first rotor. The second adjusting magnetic ring is disposed on the fourth rotor and surrounds the outer periphery of the third permanent magnet array. The fourth permanent magnet array is disposed on the housing and surrounds the outer periphery of the second adjusting magnetic ring. When the torque reduction and speed increase assembly is in operation, the rotational speed of the third rotor is greater than the rotational speed of the fourth rotor.

[0016] In some embodiments, the third rotor is provided with a slot, the first rotor is rotatably fitted into the slot, and the first rotor and the third rotor are not axially movable relative to each other.

[0017] In some embodiments, the braking assembly includes a stator and a rotor. The stator is disposed in the housing, the rotor is anti-rotatingly fitted to the third rotor, and the rotor is slidable relative to the third rotor along the axial direction of the third rotor. The stator can engage the rotor to restrict the rotation of the rotor.

[0018] In some embodiments, the outer peripheral surface of the lead screw rotor is provided with a first lead screw rotor helical permanent magnet, the inner side of the lead screw mover is provided with a first lead screw mover helical permanent magnet, and the first lead screw mover helical permanent magnet surrounds the outer periphery of the first lead screw rotor helical permanent magnet; the first lead screw rotor helical permanent magnet and the first lead screw mover helical permanent magnet are both radially magnetized and arranged in an alternating N-level to S-level arrangement on the same side.

[0019] In some embodiments, the outer circumferential surface of the lead screw rotor is provided with a first thread, and the inner side of the lead screw rotor is provided with a lead screw rotor reluctance-permanent magnet array. The lead screw rotor reluctance-permanent magnet array includes a first helical permanent magnet and a second thread. The lead screw rotor reluctance-permanent magnet array is radially magnetized, and the lead screw rotor reluctance-permanent magnet array is arranged alternately in the form of N-level-second thread-S-level-second thread.

[0020] In some embodiments, the outer circumferential surface of the lead screw rotor is provided with a second lead screw rotor helical permanent magnet, and the second lead screw rotor permanent magnet array is arranged in an alternating N-level to S-level manner. The inner side of the lead screw rotor is provided with a permanent magnet-induction array, which is composed of the second helical permanent magnet and a helical coil. The current in the helical coil includes counterclockwise and clockwise directions, and the permanent magnet-induction array is arranged in an alternating manner of N-level - counterclockwise current helical coil - S-level - clockwise helical coil.

[0021] The braking system of this invention includes the braking device of any of the above embodiments.

[0022] The vehicle of this invention includes the braking system described in the above embodiments. Attached Figure Description

[0023] Figure 1 This is an overall structural diagram of the braking device according to an embodiment of the present invention.

[0024] Figure 2 This is a cross-sectional view of the drive module of the braking device according to an embodiment of the present invention.

[0025] Figure 3 This is a cross-sectional view of the torque-reducing and speed-increasing component of the braking device according to an embodiment of the present invention.

[0026] Figure 4 This is a schematic diagram of the permanent magnet type magnetic lead screw of the braking device according to an embodiment of the present invention.

[0027] Figure 5 This is a schematic diagram of the structure of the reluctance magnetic lead screw of the braking device according to an embodiment of the present invention.

[0028] Figure 6 This is a schematic diagram of the permanent magnet-induction type magnetic screw of the braking device according to an embodiment of the present invention.

[0029] Figure label:

[0030] 1. Housing; 200. Actuation module; 21. First friction plate; 22. Friction disc; 23. Second friction plate; 300. Magnetic lead screw; 31. Lead screw rotor; 32. Lead screw mover; 33. First linear bearing; 34. Coupling; 400. Drive module; 41. First rotor; 411. First rotor core; 412. First permanent magnet array; 42. Second rotor; 421. Second rotor core; 422. First adjusting ring; 43. First stator; 4318. First stator core; 432. Armature winding; 433. Second permanent magnet array; 44. First spline bushing; 45. First bearing; 46. ​​Second bearing; 500. Self-locking module; 51. Torque reduction and speed increase assembly; 511. Third rotor; 5111. Third rotor core; 5112. Third permanent magnet array; 512. Fourth rotor; 5121. Fourth rotor core; 5122. Second magnetic adjustment ring; 513. Fourth permanent magnet array; 514. Third bearing; 52. Braking assembly; 521. Stator section; 522. Rotor section; 523. Second spline bushing; 524. Rotor section bearing; 525. Second linear bearing; 526. Magnetic isolation ring; 6. Helical permanent magnet; 7. First thread; 8. Second thread; 9. Helical coil. Detailed Implementation

[0031] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0032] like Figure 1 As shown, the braking device of this embodiment includes a housing 1, an execution module 200, a magnetic lead screw 300, and a drive module 400.

[0033] The actuator 200 is connected to the housing 1 and is used to perform braking.

[0034] like Figure 1 As shown, the execution module 200 may include a first friction plate 21, a second friction plate 23, and a friction disk 22. The friction disk 22 is located between the first friction plate 21 and the second friction plate 23. When the execution module 200 performs braking, the first friction plate 21 or the second friction plate 23 moves closer to the friction disk 22 and squeezes the friction disk 22, applying a braking torque to the friction disk 22, thereby achieving the effect of braking the friction disk 22.

[0035] In other embodiments, the execution module may also include only the first friction plate and the friction disk.

[0036] The magnetic lead screw 300 includes a lead screw rotor 31 and a lead screw mover 32. The lead screw mover 32 is slidably mounted in the housing 1 and has a braking position and a release position. In the braking position, the lead screw mover 32 acts on the execution module 200 to brake the execution module 200. In the release position, the braking of the execution module 200 is released. The lead screw rotor 31 and the lead screw mover 32 are rotatably engaged. The lead screw mover 32 is adapted to generate a magnetic force with the lead screw rotor 31 when the lead screw rotor 31 rotates, so as to drive the lead screw mover 32 to switch between the braking position and the release position.

[0037] like Figure 1 As shown, the lead screw actuator 32 can be mounted in the housing 1 via the first linear bearing 33 and can slide relative to the housing 1. When the lead screw actuator 32 slides to the right, it pushes the first friction plate 21, causing the first friction plate 21 to move towards the friction disk 22. When the first friction plate 21 contacts and presses against the friction disk 22, the lead screw actuator 32 is in the braking position. At this time, the first friction plate 21 applies a braking torque to the friction disk 22. When the lead screw actuator 32 is in any position other than the braking position, i.e., the release position, the first friction plate 21 is not in contact with the friction disk 22, and the friction disk 22 can rotate freely.

[0038] The lead screw mover 32 can be a cylindrical structure closed at one end. The lead screw rotor 31 is assembled in the cylindrical cavity of the lead screw mover 32 and can rotate relative to the lead screw mover 32. The lead screw rotor 31 or the lead screw mover 32 can be provided with a helical permanent magnet, so that when the lead screw rotor 31 rotates, the lead screw mover 32 can slide left and right relative to the lead screw rotor 31 under the action of magnetic force, switching between the braking position and the release position.

[0039] In other embodiments, the lead screw mover can also be rotatably mounted inside the lead screw rotor. Specifically, the lead screw rotor is a cylindrical structure closed at one end, and the lead screw mover is rotatably mounted inside the cylindrical cavity of the lead screw rotor.

[0040] The drive module 400 is located inside the housing 1 and is used to drive the lead screw rotor 31 to rotate.

[0041] like Figure 1 As shown, the drive module 400 can be a motor. The rotor of the motor can be connected to the lead screw rotor 31 through a coupling. When the motor rotor rotates, it will drive the lead screw rotor 31 to rotate together, thereby driving the lead screw mover 32 to switch between the braking position and the release position.

[0042] In this embodiment of the braking device, the lead screw actuator is slidably mounted within the housing. During its sliding stroke, the lead screw actuator has a braking position and a release position. When the lead screw actuator slides to the braking position, it acts on the execution module, causing the execution module to perform braking. The lead screw rotor rotates in conjunction with the lead screw actuator, and the lead screw rotor is driven to rotate by the drive module. When the lead screw rotor rotates, it can drive the lead screw actuator to slide through magnetic force, thereby achieving braking. During transmission, the lead screw rotor and lead screw actuator interact magnetically, avoiding friction and wear caused by contact, and preventing the lead screw rotor and lead screw actuator from jamming, resulting in high reliability of the braking device.

[0043] In some embodiments, the braking device includes a self-locking module 500, which includes a torque-reducing and speed-increasing component 51 and a braking component 52. The torque-reducing and speed-increasing component 51 is connected between the braking component 52 and the drive module 400. The braking component 52 is adapted to lock the drive module 400, and the torque-reducing and speed-increasing component 51 is adapted to amplify the torque exerted by the braking component 52 on the drive module 400.

[0044] like Figure 1 As shown, one end of the torque-reducing and speed-increasing component 51 is connected to the drive module 400, and the other end is connected to the braking module. When the self-locking module 500 is running, the braking module locks the drive module 400. The function of the torque-reducing and speed-increasing component 51 is to reduce the torque transmitted from the drive module 400 to the braking component 52 at the cost of increasing the rotational speed, so that the braking component 52 can lock the drive module 400 with a smaller torque. It can also be understood that the function of the torque-reducing and speed-increasing component 51 is to amplify the braking torque generated by the braking component 52 and apply it to the drive module 400. Setting up the torque-reducing and speed-increasing component can reduce the size of the braking component and reduce its energy consumption.

[0045] In some embodiments, the drive module 400 includes a first rotor 41, a second rotor 42, and a first stator 43. The first rotor 41 is connected to a torque reduction and speed increase component 51, and at least part of the torque reduction and speed increase component 51 can rotate synchronously with the first rotor 41. The second rotor 42 is rotatably mounted on the outer periphery of the first rotor 41, and when the drive module 400 is running, the rotational speed of the first rotor 41 is greater than the rotational speed of the second rotor 42. The second rotor 42 is connected to a lead screw rotor 31, and the first stator 43 is disposed in the housing 1 and surrounds the outer periphery of the second rotor 42.

[0046] like Figure 1 and Figure 2As shown, the first rotor 41 may be provided with a first splined bushing 44, and is connected to the torque-reducing and speed-increasing component 51 through the first splined bushing 44. When the first rotor 41 rotates, at least part of the torque-reducing and speed-increasing component 51 can rotate with the first rotor 41. The second rotor 42 is disposed on the outer periphery of the first rotor 41. The first rotor 41 and the second rotor 42 can be rotatably engaged with each other through a first bearing 45, and the second rotor 42 is rotatably engaged with the housing 1 through a second bearing 46. One end of the second rotor 42 is connected to the lead screw mover 32 through a coupling. When the second rotor 42 rotates, it can drive the lead screw rotor 31 to rotate, and then the lead screw rotor 31 drives the lead screw mover 32 to slide to achieve braking. The first stator 43 is fixed to the housing 1 and surrounds the outer periphery of the second rotor 42. When the drive module 400 is working, the rotational speed of the first rotor 41 is greater than the rotational speed of the second rotor 42.

[0047] In some embodiments, the drive module 400 includes a first permanent magnet array 412, a second permanent magnet array 433, and a first adjusting ring 422. The first permanent magnet array 412 is disposed on the first rotor 41, the second permanent magnet array 433 is disposed on the first stator 43, and the first adjusting ring 422 is disposed on the second rotor 42. The first adjusting ring 422 surrounds the outer periphery of the first permanent magnet array 412, and the second permanent magnet array 433 surrounds the outer periphery of the first adjusting ring 422.

[0048] like Figure 1 and Figure 2 As shown, the first rotor 41 includes a first rotor core 411 and a first permanent magnet array 412, with the first permanent magnet array 412 surrounding the outer periphery of the first rotor core 411; the second rotor 42 includes a second rotor core 421 and a first adjusting ring 422, with the second rotor core 421 adapted to support the first adjusting ring 422, and the first adjusting ring 422 surrounding the outer periphery of the first permanent magnet array 412; the first stator 43 includes a first stator core 431, an armature winding 432, and a second permanent magnet array 433, with the second permanent magnet array 433 surrounding the outer periphery of the first adjusting ring 422. Both the first permanent magnet array 412 and the second permanent magnet array 433 are radially magnetized and arranged in an alternating N-pole to S-pole configuration on the same side. The number of pole pairs of the first adjusting ring 422 is equal to the sum of the number of pole pairs of the first permanent magnet array 412 and the number of pole pairs of the second permanent magnet array 433.

[0049] In some embodiments, the torque reduction and speed increase assembly 51 includes a third rotor 511, a fourth rotor 512, a third permanent magnet array 5112, a fourth permanent magnet array 513, and a second adjusting magnetic ring 5122. The third rotor 511 is connected to the braking assembly 52. ​​The third permanent magnet array 5112 is disposed on the third rotor 511. The fourth rotor 512 is anti-rotationally assembled with the first rotor 41. The second adjusting magnetic ring 5122 is disposed on the fourth rotor 512 and surrounds the outer periphery of the third permanent magnet array 5112. The fourth permanent magnet array 513 is disposed on the housing 1 and surrounds the outer periphery of the second adjusting magnetic ring 5122. When the torque reduction and speed increase assembly 51 is operating, the rotational speed of the third rotor 511 is greater than the rotational speed of the fourth rotor 512. Both the third permanent magnet array 5112 and the fourth permanent magnet array 513 are radially magnetized and are arranged in an alternating N-level to S-level configuration on the same side. The number of pole pairs of the second magnetic ring 5122 is equal to the number of pole pairs of the third permanent magnet array 5112 plus the number of pole pairs of the fourth permanent magnet array 513.

[0050] like Figure 1 and Figure 3 As shown, the fourth rotor 512 includes a fourth rotor core 5121 and a second adjusting magnetic ring 5122, and the fourth rotor 512 is anti-rotatingly assembled with the first rotor 41 via a first splined bushing 44. The third rotor 511 is located inside the fourth rotor 512, and includes a third rotor core 5111 and a third permanent magnet array 5112, with the third permanent magnet array 5112 located on the outer periphery of the third rotor core 5111. The third rotor 511 is connected to the braking assembly 52. ​​The fourth permanent magnet array 513 is fixed inside the housing 1 and surrounds the outer periphery of the third permanent magnet array 5112. When the torque reduction and speed increase assembly 51 is running, the first rotor 41 drives the fourth rotor 512 to rotate. Under the action of magnetic force, the third rotor 511 rotates with the fourth rotor 512, and the speed of the third rotor 511 is greater than that of the fourth rotor 512, while the torque on the third rotor 511 is less than that on the fourth rotor 512.

[0051] In some embodiments, the third rotor 511 is provided with a slot, the first rotor 41 is rotatably fitted in the slot, and the first rotor 41 and the third rotor 511 cannot move relative to each other in the axial direction of the first rotor 41.

[0052] like Figure 1 As shown, the third rotor 511 is provided with a slot, and a third bearing 514 is installed in the slot. The first rotor 41 rotates with the third rotor 511 through the third bearing 514. At the same time, the third rotor 511 cannot move axially relative to the first rotor 41.

[0053] In some embodiments, the braking assembly 52 includes a stator portion 521 and a rotor portion 522. The stator portion 521 is disposed in the housing 1. The rotor portion 522 is anti-rotationally assembled with the third rotor 511. The rotor portion 522 is slidable relative to the third rotor 511 along the axial direction of the third rotor 511. The stator portion 521 can attract the rotor portion 522 to restrict the rotation of the rotor portion 522.

[0054] like Figure 1 As shown, the stator portion 521 can be disc-shaped and fixed to the housing 1. The rotor portion 522 can be anti-rotatingly assembled with the third rotor 511 via the second splined bushing 523. A magnetic shielding ring 526 is provided on the side of the rotor portion 522 away from the stator portion 521. In addition, a rotor bearing 524 is provided on the outer periphery of the rotor portion 522, and the rotor bearing 524 is slidably assembled to the housing 1 via a second linear bearing 525. The rotor portion 522 can slide axially along the second linear bearing 525. When the rotor portion 522 slides away from the stator portion 521, a gap is left between the rotor portion 522 and the stator portion 521, and the rotor portion 522 can rotate freely with the third rotor 511; when the rotor portion 522 slides close to the stator portion 521 and contacts and presses against the stator portion 521, the stator portion 521 will lock the rotor portion 522.

[0055] Specifically, the rotor 522 can be a permanent magnet, and the stator 521 can be an electromagnet. When the stator 521 is energized, the rotor 522 and the stator 521 repel each other, leaving a gap between them. A return spring can be provided on the side of the rotor 522 away from the stator 521, and the return spring is in a compressed state when the stator 521 is energized. When the stator 521 is de-energized, the moving part slides toward the stator 521 and attracts it, locking the moving part. After the moving part is locked, the third rotor 511, which is anti-rotationally assembled with the moving part, is also locked. Under the action of magnetic force, the fourth rotor 512 stops rotating. At this point, the drive module 400 has completed the locking process.

[0056] In some embodiments, the outer peripheral surface of the lead screw rotor is provided with a first lead screw rotor helical permanent magnet, the inner side of the lead screw mover is provided with a first lead screw mover helical permanent magnet, and the first lead screw mover helical permanent magnet surrounds the outer periphery of the first lead screw rotor helical permanent magnet; the first lead screw rotor helical permanent magnet and the first lead screw mover helical permanent magnet are both radially magnetized and arranged in an alternating N-level to S-level arrangement on the same side.

[0057] like Figure 4As shown, the magnetic lead screw 300 can be a permanent magnet magnetic lead screw 300. The outer circumferential surface of the lead screw rotor 31 is provided with a lead screw rotor helical permanent magnet 6, and the inner side of the lead screw mover 32 is provided with a lead screw mover helical permanent magnet 6. The lead screw mover helical permanent magnet 6 surrounds the outer circumference of the lead screw rotor helical permanent magnet 6. Both the lead screw rotor helical permanent magnet 6 and the lead screw mover helical permanent magnet 6 are radially magnetized and are arranged in an alternating N-level to S-level arrangement on the same side.

[0058] In some embodiments, the outer circumferential surface of the lead screw rotor is provided with a first thread, and the inner side of the lead screw rotor is provided with a lead screw rotor reluctance-permanent magnet array. The lead screw rotor reluctance-permanent magnet array includes a first helical permanent magnet and a second thread. The lead screw rotor reluctance-permanent magnet array is radially magnetized, and the lead screw rotor reluctance-permanent magnet array is arranged alternately in the form of N-level-second thread-S-level-second thread.

[0059] like Figure 5 As shown, a reluctance type magnetic lead screw. The outer circumferential surface of the lead screw rotor 31 is provided with a first thread 7, and the inner side of the lead screw mover 32 is provided with a lead screw mover reluctance-permanent magnet array. The lead screw mover reluctance-permanent magnet array includes a helical permanent magnet 6 and a second thread 8. The lead screw mover reluctance-permanent magnet array is radially magnetized, and the lead screw mover reluctance-permanent magnet array is arranged alternately in the form of N-level - second thread 8 - S-level - second thread 8.

[0060] In some embodiments, the outer circumferential surface of the lead screw rotor is provided with a second lead screw rotor helical permanent magnet, and the second lead screw rotor permanent magnet array is arranged in an alternating N-level to S-level manner. The inner side of the lead screw rotor is provided with a permanent magnet-induction array, which is composed of the second helical permanent magnet and a helical coil. The current in the helical coil includes counterclockwise and clockwise directions, and the permanent magnet-induction array is arranged in an alternating manner of N-level - counterclockwise current helical coil - S-level - clockwise helical coil.

[0061] like Figure 6 As shown, a permanent magnet induction type magnetic lead screw 300 is provided. The outer circumference of the lead screw rotor 31 is provided with a helical permanent magnet 6, and the permanent magnet array of the lead screw rotor is arranged in an alternating N-level to S-level manner. The inner side of the lead screw mover 32 is provided with a permanent magnet-induction array, which is composed of helical permanent magnets 6 and helical coils 9. The current in the helical coil includes counterclockwise and clockwise directions. The permanent magnet-induction array is arranged in an alternating manner of N-level - counterclockwise current helical coil - S-level - clockwise helical coil.

[0062] The braking system according to an embodiment of the present invention is described below:

[0063] The braking system of this invention includes the braking device in any of the above embodiments.

[0064] The vehicle according to an embodiment of the present invention is described below:

[0065] The vehicle in this embodiment of the invention includes the braking system described in the above embodiments.

[0066] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0067] Furthermore, 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 at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0068] In this invention, unless otherwise explicitly 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 of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0069] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0070] 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 the present invention. 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. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0071] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A braking device, characterized in that, include: case; An execution module, connected to the housing, is used to perform braking; A magnetic lead screw, comprising a lead screw rotor and a lead screw mover, the lead screw mover being slidably mounted within the housing and having a braking position and a release position; in the braking position, the lead screw mover acts on the actuation module to brake the actuation module; in the release position, the braking of the actuation module is released. The lead screw rotor and the lead screw mover are rotatably coupled. The lead screw mover is adapted to generate a magnetic force with the lead screw rotor when the lead screw rotor rotates, so as to drive the lead screw mover to switch between the braking position and the release position. A drive module, which is located inside the housing and is used to drive the lead screw rotor to rotate; The system includes a self-locking module, which comprises a torque-reducing and speed-increasing component and a braking component. The torque-reducing and speed-increasing component is connected between the braking component and the drive module. The braking component is adapted to lock the drive module, and the torque-reducing and speed-increasing component is adapted to amplify the torque exerted by the braking component on the drive module. The drive module includes a first rotor, a second rotor, and a first stator. The first rotor is connected to the torque reduction and speed increase component, and at least part of the torque reduction and speed increase component can rotate synchronously with the first rotor. The second rotor is rotatably mounted on the outer periphery of the first rotor. When the drive module is running, the speed of the first rotor is greater than the speed of the second rotor. The second rotor is connected to the lead screw rotor. The first stator is disposed in the housing and surrounds the outer periphery of the second rotor.

2. The braking device according to claim 1, characterized in that, The drive module includes a first permanent magnet array, a second permanent magnet array, and a first adjusting ring. The first permanent magnet array is disposed on the first rotor, the second permanent magnet array is disposed on the first stator, and the first adjusting ring is disposed on the second rotor. The first adjusting ring surrounds the outer periphery of the first permanent magnet array, and the second permanent magnet array surrounds the outer periphery of the first adjusting ring.

3. The braking device according to claim 1, characterized in that, The torque reduction and speed increase assembly includes a third rotor, a fourth rotor, a third permanent magnet array, a fourth permanent magnet array, and a second adjusting magnetic ring. The third rotor is connected to the braking assembly. The third permanent magnet array is disposed on the third rotor. The fourth rotor is anti-rotationally assembled with the first rotor. The second adjusting magnetic ring is disposed on the fourth rotor and surrounds the outer periphery of the third permanent magnet array. The fourth permanent magnet array is disposed on the housing and surrounds the outer periphery of the second adjusting magnetic ring. When the torque reduction and speed increase assembly is operating, the rotational speed of the third rotor is greater than the rotational speed of the fourth rotor.

4. The braking device according to claim 3, characterized in that, The third rotor is provided with a slot, the first rotor is rotatably fitted in the slot, and the first rotor and the third rotor cannot move relative to each other in the axial direction of the first rotor.

5. The braking device according to claim 4, characterized in that, The braking assembly includes a stator and a rotor. The stator is disposed in the housing. The rotor is anti-rotationally assembled with the third rotor. The rotor is slidable relative to the third rotor along the axial direction of the third rotor. The stator can engage the rotor to restrict the rotation of the rotor.

6. The braking device according to claim 1, characterized in that, The outer circumferential surface of the lead screw rotor is provided with a first lead screw rotor helical permanent magnet, and the inner side of the lead screw mover is provided with a first lead screw mover helical permanent magnet, and the first lead screw mover helical permanent magnet surrounds the outer circumference of the first lead screw rotor helical permanent magnet; the first lead screw rotor helical permanent magnet and the first lead screw mover helical permanent magnet are both radially magnetized and arranged in an alternating N-level to S-level arrangement on the same side.

7. The braking device according to claim 1, characterized in that, The outer circumferential surface of the lead screw rotor is provided with a first thread, and the inner side of the lead screw rotor is provided with a lead screw rotor reluctance-permanent magnet array. The lead screw rotor reluctance-permanent magnet array includes a first helical permanent magnet and a second thread. The lead screw rotor reluctance-permanent magnet array is radially magnetized, and the lead screw rotor reluctance-permanent magnet array is arranged alternately in the form of N-level-second thread-S-level-second thread.

8. The braking device according to claim 1, characterized in that, The outer circumference of the lead screw rotor is provided with a second lead screw rotor helical permanent magnet, and the second lead screw rotor permanent magnet array is arranged in an alternating N-level to S-level manner. The inner side of the lead screw rotor is provided with a permanent magnet-induction array, which is composed of the second helical permanent magnet and a helical coil. The current in the helical coil includes counterclockwise and clockwise directions. The permanent magnet-induction array is arranged in an alternating manner of N-level - counterclockwise current helical coil - S-level - clockwise helical coil.

9. A braking system, characterized in that, The braking system includes the braking device according to any one of claims 1-8.

10. A vehicle, characterized in that, The vehicle includes the braking system as described in claim 9.

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