Brake and vehicle

Abstract

The utility model discloses a brake and a vehicle. The brake comprises a motor, a planetary gear, a brake part, a brake disc and a sensor. The motor is provided with a transmission end for transmitting power; the planetary gear is in power connection with the transmission end; the braking part comprises a ball screw, a piston and a friction plate which are sequentially arranged in the first direction, the end, away from the piston, of the ball screw is connected with a planetary gear, and the planetary gear can drive the ball screw to rotate along the axis of the first direction, so that the piston is driven to move in the first direction, and the friction plate is driven to move in the first direction; the brake disc is configured to be capable of being abutted by the friction plate to realize braking; the sensor is arranged on the ball screw in a sleeving mode and can be squeezed by the piston so as to sense the braking force of the friction plate. The brake replaces an original hydraulic braking mode, the braking response is fast, the braking time is shortened, the braking distance is shortened, meanwhile, the sensor provides real-time braking force for an external receiving device, and accurate control over the brake is facilitated.

Description

Technical Field

[0001] This application relates to the technical field of braking systems, and in particular, to a brake and a vehicle. Background Art

[0002] At present, hydraulic braking is still used in vehicles, with slow response, long braking time, and long braking distance.

[0003] CN 104443368 A discloses an electro-brake actuator integrated with a force sensor and a ball screw. The ball screw assembly is located inside a housing. The nut is cylindrical, and the screw is in the shape of a housing. Spiral semi-circular grooves are respectively machined on the inner surface of the nut and the outer surface of the screw, and the radii of the spiral semi-circular grooves located on the inner surface of the nut and the outer surface of the screw are the same, and the spiral angles are also the same. When the spiral semi-circular grooves on the inner surface of the nut and the outer surface of the screw cooperate to form a complete circular spiral groove, a closed spiral raceway is formed, enabling the balls to roll in this closed spiral raceway. The present invention integrates a force sensor with a ball screw, and the force sensor is located in the inner hole of the ball screw, reducing the loss during the force transmission process and improving the measurement accuracy. Therefore, how to improve the braking response, reduce the braking time, shorten the braking distance, and be able to monitor and feedback the magnitude of the braking force in real time has become an urgent problem to be solved. Utility Model Content

[0004] This application aims to solve at least one of the technical problems existing in the prior art. To this end, in a first aspect, this application proposes a brake, which replaces the original hydraulic braking method, has a fast braking response, reduces the braking time, shortens the braking distance, and can monitor and feedback the magnitude of the braking force in real time, reducing the difficulty and complexity of the software algorithm and the difficulty and complexity of software development.

[0005] A brake according to an embodiment of the first aspect of this application includes a motor, a planetary gear, a braking part, a brake disc, and a sensor. The motor has a transmission end for transmitting power; the planetary gear is power-connected to the transmission end; the braking part includes a ball screw, a piston, and a friction plate arranged in sequence along a first direction. One end of the ball screw away from the piston is connected to the planetary gear. The planetary gear can drive the ball screw to rotate along the axis in the first direction, thereby driving the piston to move in the first direction, and then driving the friction plate to move in the first direction; the brake disc is configured to be abutted by the friction plate to achieve braking; the sensor is sleeved on the ball screw, and the sensor can be squeezed by the piston to sense the braking force of the friction plate.

[0006] A brake according to an embodiment of the present application uses a motor to provide power to drive the planetary gear to rotate, and the planetary gear drives the ball screw of the braking part to rotate. The ball screw drives the piston to move in the first direction, so that the piston drives the friction plate to move in the first direction, so that the friction plate abuts against the brake disc, and braking is achieved through the brake disc, replacing the original hydraulic braking method. The braking response is fast, the braking time is reduced, and the braking distance is shortened. At the same time, when the friction plate abuts against the brake disc for braking, the axial reaction force of the ball screw acts on the sensor, so that the sensor senses the braking force of the friction plate. The sensor provides the magnitude of the real-time braking force to a receiving device outside, so as to facilitate the precise control of the brake, provide real-time braking force numerical feedback for more advanced automatic driving and driverless driving, reduce the difficulty and complexity of software algorithms, and reduce the difficulty and complexity of software development.

[0007] In some embodiments, the braking part further includes a nut and balls. One end of the nut is connected to the end of the piston away from the brake disc. The nut is sleeved on the end of the ball screw away from the planetary gear, defining a receiving cavity for clamping the balls. The ball screw can drive the balls to rotate, so that the nut drives the piston to move in the first direction.

[0008] In some embodiments, the braking part further includes a conversion part. One of the conversion part and the nut is provided with a first matching part, and the other is provided with a second matching part. The first matching part and the second matching part are matched and connected to make the balls drive the nut to move in the first direction.

[0009] In some embodiments, the nut and the piston are integrally formed.

[0010] In some embodiments, the nut is threadedly connected to the piston.

[0011] In some embodiments, the brake further includes a sleeve. The sleeve is fixedly connected to the outside. The braking part is arranged inside the sleeve. One end of the sensor in the first direction abuts against the inner wall of the sleeve.

[0012] In some embodiments, the braking part further includes a special-shaped block. The special-shaped block is sleeved on the ball screw. The two ends of the special-shaped block in the first direction are respectively connected to the sensor and the piston. The special-shaped block can move in the first direction to jointly squeeze the sensor with the sleeve.

[0013] In some embodiments, the braking part further includes a gasket. The gasket is sleeved on the ball screw. One end of the gasket in the first direction abuts against the special-shaped block, and the other end can abut against the shoulder shaft of the ball screw.

[0014] In some embodiments, the ball screw is splined to the planetary gear.

[0015] In a second aspect, the present application also provides a vehicle, including the brake according to any one of the above, for braking the vehicle.

[0016] The additional aspects and advantages of the present application will be partly given in the following description, partly will become apparent from the following description, or be learned through the practice of the present application. Description of the Drawings

[0017] The present application will be further described below in conjunction with the drawings and embodiments, where:

[0018] Figure 1 is a schematic diagram of the external structure of the brake according to the embodiment of the first aspect of the present application;

[0019] Figure 2 is Figure 1 a schematic diagram of the structure of the motor and the planetary gear in the brake in

[0020] Figure 3 is Figure 1 a schematic diagram of the internal structure of the brake in

[0021] Figure 4 is Figure 3 a schematic diagram of the structure of the braking part in

[0022] Figure 5 is a schematic diagram of the connection between the ball screw and the planetary gear;

[0023] Figure 6 is a schematic diagram of the connection between the piston and the nut in some embodiments;

[0024] Figure 7 is a schematic diagram of the connection between the piston and the nut in some other embodiments;

[0025] Figure 8 is a schematic diagram of the connection between the piston and the nut in still some other embodiments;

[0026] Figure 9 is a schematic diagram of the connection between the conversion member and the nut in some embodiments;

[0027] Figure 10 is a schematic diagram of the connection between the conversion member and the nut in some other embodiments;

[0028] Figure 11 is a schematic diagram of the structure of one end of the sleeve away from the brake disc in some embodiments;

[0029] Figure 12 is a schematic diagram of the structure of one end of the sleeve away from the brake disc in some other embodiments.

[0030] Reference numerals: Brake 1;

[0031] Motor 10, drive end 11;

[0032] Planetary gear 20;

[0033] Braking part 30, ball screw 31, first spline 311, screw rod 312, shoulder 313, piston 32, friction plate 33, nut 34, ball 35, conversion part 36, first mating part 361, second mating part 362, sleeve 37, opening 371, second spline 372, special-shaped block 38, gasket 39;

[0034] Sensor 50;

[0035] First direction X. Detailed implementation manners

[0036] The embodiments of the present application will be described in detail below. The examples of the embodiments are shown in the drawings, where 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 drawings are exemplary and are only used to explain the present application and should not be construed as a limitation to the present application.

[0037] In the description of the present application, it should be understood that the orientation or positional relationship indicated by terms such as up, down, front, back, left, right, etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application.

[0038] In the description of the present application, the meaning of several is more than one, the meaning of multiple is more than two, and understandings such as greater than, less than, exceeding, etc. do not include the present number, and understandings such as above, below, within, etc. include the present number. If there is a description of first and second, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0039] In the description of the present application, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present application in combination with the specific content of the technical solution.

[0040] In the description of this application, the descriptions with reference terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of this application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0041] Figure 1 FIG. 4 is a schematic external structure diagram of the brake 1 according to an embodiment of the first aspect of this application; Figure 2 is Figure 1 a schematic structure diagram of the motor 10 and the planetary gear 20 of the brake 1 in FIG. 4; Figure 3 is Figure 1 a schematic internal structure diagram of the brake 1 in FIG. 4; Figure 4 is Figure 3 a schematic structure diagram of the braking part 30 in FIG. 4; Figure 5 is a schematic connection diagram of the ball screw 31 and the planetary gear 20; Figure 6 is a schematic connection diagram of the piston 32 and the nut 34 in some embodiments; Figure 7 is a schematic connection diagram of the piston 32 and the nut 34 in some other embodiments; Figure 8 is a schematic connection diagram of the piston 32 and the nut 34 in still some other embodiments; Figure 9 is a schematic connection diagram of the conversion part 36 and the nut 34 in some embodiments; Figure 10 is a schematic connection diagram of the conversion part 36 and the nut 34 in some other embodiments;

[0042] Figure 11 is a schematic structure diagram of one end of the sleeve 37 away from the brake disc in some embodiments; Figure 12 is a schematic structure diagram of one end of the sleeve 37 away from the brake disc in some other embodiments.

[0043] Please refer to Figures 1 to 5。An embodiment of the present application provides a brake 1, including a motor 10, a planetary gear 20, a braking portion 30, a brake disc, and a sensor 50. The motor 10 has a transmission end 11 for transmitting power; the planetary gear 20 is power-connected to the transmission end 11; the braking portion 30 includes a ball screw 31, a piston 32, and a friction plate 33 arranged in sequence along a first direction X. One end of the ball screw 31 away from the piston 32 is connected to the planetary gear 20. The planetary gear 20 can drive the ball screw 31 to rotate along the axis of the first direction X, thereby driving the piston 32 to move along the first direction X, and then driving the friction plate 33 to move along the first direction X; the brake disc is configured to be abutted by the friction plate 33 to achieve braking; the sensor 50 is sleeved on the ball screw 31, and the sensor 50 can be squeezed by the piston 32 to sense the braking force of the friction plate 33.

[0044] In some embodiments, the transmission end 11 of the motor 10 can be a gear. The gear is connected to the rotor of the motor 10 through a transmission shaft, and can transmit the power of the motor 10 to the outside through the rotation of the gear.

[0045] In some embodiments, the transmission end 11 of the motor 10 can be a gear. The gear meshes with the planetary gear 20, and the gear drives the planetary gear 20 to rotate to transmit power in this way. The planetary gear 20 can reduce speed and increase torque.

[0046] In some embodiments, the first direction X can be represented by the direction shown by the letter X in the figure.

[0047] In some embodiments, the ball screw 31 can include a screw 312. One end of the screw 312 is meshed and connected to the planetary gear 20 through a coupling. The motor 10 can drive the screw 312 of the ball screw 31 to rotate through the transmission end 11 and then through the planetary gear 20. The screw 312 has an axis extending along the first direction X, and the rotation direction of the screw 312 is to rotate around the axis extending along the first direction X.

[0048] In some embodiments, the ball screw 31 is connected to the planetary gear 20 through a first spline 311, that is, the coupling can be the first spline 311.

[0049] In some embodiments, the ball screw 31 and the piston 32 are arranged along the first direction X. During the rotation of the screw 312 of the ball screw 31, the piston 32 can be driven to move away from the screw 312 along the first direction X through an intermediate member as a medium. The intermediate member can include balls 35, nuts 34, etc.

[0050] In some embodiments, when the motor 10 rotates in the first rotation direction, the transmission end 11 can be driven to rotate in the first rotation direction, so as to drive the lead screw 312 to move closer to the brake disc in the first direction X, thereby driving the friction plate 33 to move closer to the brake disc in the first direction X through the piston 32. A gap can be provided between the friction plate 33 and the piston 32. The piston 32 first eliminates the gap and then drives the friction plate 33 to move. The friction plate 33 has a certain ability of elastic deformation. The friction plate 33 is first compressed, and then the friction plate 33 abuts against the brake disc to achieve braking.

[0051] In some embodiments, when the motor 10 rotates in the second rotation direction, the transmission end 11 can be driven to rotate in the second rotation direction, so as to drive the lead screw 312 to move away from the brake disc in the first direction X, thereby driving the piston 32 to move away from the brake disc in the first direction X, so that the friction plate 33 is no longer held by the piston 32, and the friction plate 33 returns to its normal state, so that the friction plate 33 is separated from the brake disc, thereby ending the braking. Among them, the first rotation direction and the second rotation direction are opposite. For example, the first rotation direction can be clockwise rotation, and the second rotation direction can be counterclockwise rotation.

[0052] A brake 1 according to an embodiment of the present application uses the motor 10 to provide power to drive the planetary gear 20 to rotate, and drives the ball screw 31 of the braking part 30 to rotate through the planetary gear 20. The ball screw 31 drives the piston 32 to move in the first direction X, thereby driving the friction plate 33 to move in the first direction X through the piston 32, so that the friction plate 33 abuts against the brake disc, and braking is achieved through the brake disc, replacing the original hydraulic braking method. The braking response is fast, the braking time is reduced, the braking distance is shortened. At the same time, when the friction plate 33 abuts against the brake disc for braking, the axial reaction force of the ball screw 31 acts on the sensor 50, so that the sensor 50 senses the braking force of the friction plate 33. The sensor 50 provides the magnitude of the real-time braking force to a receiving device outside, so as to facilitate the precise control of the brake 1, provide real-time braking force numerical feedback for more advanced autonomous driving and driverless driving, and reduce the difficulty and complexity of software algorithms and the difficulty and complexity of software development.

[0053] Please refer to Figures 3 to 4 、 Figures 6 to 8 In some embodiments, the braking part 30 further includes a nut 34 and balls 35. One end of the nut 34 is connected to the end of the piston 32 away from the brake disc. The nut 34 is sleeved on the end of the ball screw 31 away from the planetary gear, defining a receiving cavity for clamping the balls 35. The ball screw 31 can drive the balls 35 to rotate, so that the nut 34 drives the piston 32 to move in the first direction X.

[0054] In some embodiments, the ball screw 31 may include a screw 312 and balls 35. The nut 34 may be sleeved on the outer peripheral surface of the screw. At least part of the nut 34 and at least part of the screw 312 jointly define a receiving cavity. The balls 35 are received in the receiving cavity, and the balls 35 are in contact with the inner wall of the receiving cavity, that is, two opposite parts of the balls 35 are respectively in contact with the screw 312 and the nut 34.

[0055] In some embodiments, when the screw 312 is driven to rotate by the planetary gear 20, it can drive the balls 35 to rotate and cause the nut 34 to have a tendency to rotate. Among them, the rotation tendency of the nut 34 is converted into movement along the first direction X by other components, and the other components may be a conversion member 36.

[0056] In some embodiments, the motor 10 drives the ball screw 31 to rotate, so that the nut 34 moves closer to or away from the brake disc along the first direction X, thereby driving the piston 32 to move closer to or away from the brake disc along the first direction X, so as to change the position of the friction plate 33, thereby realizing braking and ending braking.

[0057] The ball screw 31 drives the nut 34 to move, thereby driving the friction plate 33 to move through the piston 32, realizing braking and ending braking, replacing the original hydraulic braking method, with fast braking response, reduced braking time, and shortened braking distance.

[0058] Please refer to Figure 6 In some embodiments, the nut 34 and the piston 32 are integrally formed. The piston 32 and the nut 34 are processed into one body, saving materials.

[0059] Please refer to Figures 7 to 8 In some embodiments, the nut 34 is threadedly connected to the piston 32.

[0060] In some embodiments, the piston 32 may be disposed inside the nut 34, that is, the nut 34 is sleeved on the outer peripheral surface of the piston 32 through threaded connection. In other embodiments, the nut 34 may be disposed inside the piston 32, that is, the piston 32 is sleeved on the outer peripheral surface of the nut 34 through threaded connection. The head of the piston 32 and the nut 34 are separately processed, using different materials and processing techniques, which is beneficial to cost reduction and processing.

[0061] In some embodiments, the braking part 30 further includes a conversion member 36. One of the conversion member 36 and the nut 34 is provided with a first fitting portion 361, and the other is provided with a second fitting portion 362. The first fitting portion 361 and the second fitting portion 362 are matingly connected to enable the balls 35 to drive the nut 34 to move along the first direction X.

[0062] Please refer to Figures 9 to 10. In some embodiments, the converter 36 can be connected to one end of the nut 34 close to the brake disc along the first direction X.

[0063] In some embodiments, the converter 36 can be provided with a first mating portion 361. The first mating portion 361 can be a groove that is recessed along the first direction X. At the same time, the nut 34 can be provided with a second mating portion 362. The second mating portion 362 can be a circular or other-shaped protrusion that matches the shape and size of the groove of the first mating portion 361. The protrusion extends along the first direction X, and the number of protrusions is multiple. When the nut 34 and the converter 36 are assembled, the grooves of the first mating portion 361 and the protrusions of the second mating portion 362 can be correspondingly matched and assembled one by one. Driven by the ball 35, the nut 34 has a tendency to rotate. Under the matching connection of the first mating portion 361 and the second mating portion 362, the nut 34 can only move along the extending direction of the matching connection of the first mating portion 361 and the second mating portion 362, that is, the nut 34 can only move along the first direction X.

[0064] In some embodiments, the converter 36 can be provided with a first mating portion 361. The first mating portion 361 can be multiple grooves that are recessed along the first direction X. At the same time, the nut 34 can be provided with a second mating portion 362. The second mating portion 362 can also be multiple grooves that are recessed along the first direction X. When the nut 34 and the converter 36 are assembled, the grooves of the first mating portion 361 and the second mating portion 362 are connected by a pin that matches the groove or a pin with a diameter slightly smaller than the groove. Among them, the pin with a diameter slightly smaller than the groove is beneficial for assembly. The pin blocks the rotational movement of the nut 34 in the circumferential direction, and at the same time converts the acting force into a driving force that can only move along the first direction X, so that the nut 34 can only move axially in or out along the pin, that is, the nut 34 can only move along the first direction X.

[0065] By the matching connection of the converter 36 and the nut 34, the rotational movement of the ball screw 31 is converted into a linear reciprocating movement along the first direction X, thereby realizing the driving of the piston 32 on the friction plate 33 and realizing braking.

[0066] Please refer to Figures 3 to 4 . In some embodiments, the brake 1 further includes a sleeve 37. The sleeve 37 is fixedly connected to the outside. The braking portion 30 is disposed inside the sleeve 37. One end of the sensor 50 in the first direction X abuts against the inner wall of the sleeve 37.

[0067] In some embodiments, the nut 34 can be a part of the ball screw 31, and the converter 36 can be a part of the sleeve 37.

[0068] In some embodiments, the sleeve 37 can be fixedly connected to an external bracket. While accommodating the braking portion 30, it supports the internal structure. The sleeve 37 is used to support the lead screw 312 of the ball screw 31, protecting the internal structure and improving the installation stability of the internal structure at the same time.

[0069] In some embodiments, the sleeve 37 is press-fitted and fixed on the bracket, or connected to the bracket by means such as riveting or threading. To prevent the rotation of the sleeve 37, a pin or thread glue can be used to prevent the sleeve 37 from rotating.

[0070] Please refer to Figures 3 to 4 In some embodiments, the braking portion 30 further includes a special-shaped block 38. The special-shaped block 38 is sleeved on the ball screw 31. The two ends of the special-shaped block 38 in the first direction X are respectively connected to the sensor 50 and the piston 32. The special-shaped block 38 can move along the first direction X to jointly squeeze the sensor 50 with the sleeve 37.

[0071] In some embodiments, the special-shaped block 38 can be sleeved on the lead screw 312 of the ball screw 31.

[0072] In some embodiments, one end of the special-shaped block 38 abuts against the sensor 50, and the end of the sensor 50 away from the special-shaped block 38 abuts against the inside of the sleeve 37. Among them, the special-shaped block 38 abuts against the shaft shoulder 313 of the lead screw 312 of the ball screw 31 through other components. During braking, the nut 34 moves close to the brake disc along the first direction X under the action of the conversion member 36. The nut 34 is assembled with the piston 32, driving the piston 32 to move close to the brake disc along the first direction X and pushing the friction plate 33 to move forward in the direction close to the brake disc. When the friction plate 33 contacts the brake disc, a positive pressure on the brake disc is generated, and at the same time, a reaction force is generated on the lead screw 312 of the ball screw 31. The shaft shoulder 313 of the lead screw 312 contacts other components, thereby pushing the special-shaped block 38. The position of the sleeve 37 remains unchanged. Through force transmission, the sensor 50 is squeezed by the special-shaped block 38. There is a piezoresistive element in the sensor 50. The piezoresistive element deforms under the action of force, the resistance value of the bridge resistor arranged in the sensor 50 changes, causing the output value to change. The output value is in a proportional relationship with the force received by the sensor 50. Thus, the specific magnitude of the force acting on the sensor 50 can be obtained.

[0073] In some embodiments, the shaft shoulder 313 is a portion of the lead screw 312 of the ball screw 31 that protrudes outward along a direction perpendicular to the axis of the lead screw 312. The axis direction is also the first direction X.

[0074] In some embodiments, the sensor 50 can be a force sensor 50.

[0075] In some embodiments, the other component can be a gasket 39.

[0076] When the friction plate 33 abuts against the brake disc for braking, the axial reaction force of the ball screw 31 acts on the sensor 50, enabling the sensor 50 to sense the braking force of the friction plate 33. The sensor 50 provides the magnitude of the real-time braking force to a receiving device outside, facilitating the precise control of the brake 1, providing real-time numerical feedback of the braking force for more advanced autonomous driving and driverless driving, reducing the difficulty and complexity of software algorithms, and reducing the difficulty and complexity of software development. At the same time, the action of force on the sensor 50 is realized through the special-shaped block 38, and the sensor 50 senses the force.

[0077] Please refer to Figures 3 to 4 In some embodiments, the braking part 30 further includes a gasket 39. The gasket 39 is sleeved on the ball screw 31. One end of the gasket 39 in the first direction X abuts against the special-shaped block 38, and the other end can abut against the shoulder shaft 313 of the ball screw 31.

[0078] In some embodiments, the gasket 39 and the special-shaped block 38 can be made of high-strength alloy steel. Among them, the materials of the two can be the same and have good flatness.

[0079] In some embodiments, the contact surface between the gasket 39 and the shaft shoulder 313 of the lead screw 312 can have good flatness, so as to facilitate the transfer of the axial pressure of the lead screw 312 to the special-shaped block 38.

[0080] In some embodiments, to reduce the friction between the special-shaped block 38 and the lead screw 312 of the ball screw 31, grease lubrication or an inner diameter sleeve made of antifriction material can be used to contact the outer diameter of the shaft.

[0081] Please refer to Figures 11 to 12 In some embodiments, on the first direction X, an opening 371 is provided at one end of the sleeve 37 away from the brake disc. The opening 371 is used to accommodate the circuit of the sensor 50.

[0082] In some embodiments, after the connecting wire of the sensor 50 extends out, an opening 371 is opened at one end of the sleeve 37 away from the brake disc. The number of the openings 371 can be multiple. The multiple openings 371 are symmetrically arranged with respect to the axis of the sleeve 37 in the first direction X to accommodate the extension of the wire harness of the sensor 50. At the same time, an opening 371 can also be opened on the side surface of the sleeve 37 to facilitate the turning and layout of the wire harness of the sensor 50. At the same time, for convenient space layout, there is no need to distinguish the installation angle and direction of the sleeve 37.

[0083] In some embodiments, one end of the sleeve 37 can be in interference fit with the bracket and evenly distributed in the circumferential direction through a plurality of pins to connect the sleeve 37 and the bracket, while reducing the probability of the sleeve 37 rotating in the circumferential direction and improving the stability of the brake 1.

[0084] In some embodiments, a protrusion may also be provided at one end of the sleeve 37, and a groove is provided on the bracket to cooperate with the protrusion of the sleeve 37, or the connection between the sleeve 37 and the bracket is realized through the second spline 372, reducing the probability of the sleeve 37 rotating in the circumferential direction and improving the stability of the brake 1.

[0085] In some embodiments, the present application also provides a vehicle, and the above-mentioned brake is fixedly provided inside the vehicle, and the brake is used for braking the vehicle.

[0086] In some embodiments, the brake may not be provided inside the vehicle. For example, the brake may be provided on a tire or the like and act directly on the tire.

[0087] The embodiments of the present application have been described in detail above with reference to the accompanying drawings. However, the present application is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present application within the scope of knowledge possessed by those of ordinary skill in the art. In addition, the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

Claims

1. A brake, characterized in that, Comprising: A motor having a transmission end for transmitting power; A planetary gear, which is power-connected to the transmission end; A braking part, which includes a ball screw, a piston and a friction plate arranged in sequence along a first direction. One end of the ball screw away from the piston is connected to the planetary gear. The planetary gear can drive the ball screw to rotate along the axis in the first direction, so as to drive the piston to move in the first direction, and then drive the friction plate to move in the first direction; A brake disc configured to be abutted by the friction plate to achieve braking; A sensor sleeved on the ball screw, and the sensor can be extruded by the piston to sense the braking force of the friction plate.

2. The brake according to claim 1, characterized in that, The braking part further includes a nut and balls. One end of the nut is connected to the end of the piston away from the brake disc. The nut is sleeved on the end of the ball screw away from the planetary gear, defining an accommodating cavity for clamping the balls. The ball screw can drive the balls to rotate so that the nut drives the piston to move in the first direction.

3. The brake according to claim 2, characterized in that, The braking part further includes a conversion part. One of the conversion part and the nut is provided with a first matching part, and the other is provided with a second matching part. The first matching part and the second matching part are matched and connected so that the balls drive the nut to move in the first direction.

4. The brake according to claim 2, characterized in that, The nut is integrally formed with the piston.

5. The brake according to claim 2, characterized in that, The nut is threadedly connected to the piston.

6. The brake according to claim 1, characterized in that, The brake further includes a sleeve, which is fixedly connected to the outside. The braking part is arranged inside the sleeve, and one end of the sensor in the first direction abuts against the inner wall of the sleeve.

7. The brake according to claim 6, characterized in that, The braking part further includes a special-shaped block sleeved on the ball screw. The two ends of the special-shaped block in the first direction are respectively connected to the sensor and the piston. The special-shaped block can move in the first direction to jointly extrude the sensor with the sleeve.

8. The brake according to claim 7, characterized in that, The braking part further includes a gasket sleeved on the ball screw. One end of the gasket in the first direction abuts against the special-shaped block, and the other end can abut against the shoulder shaft of the ball screw.

9. The brake according to claim 1, characterized in that, The ball screw is spline-connected to the planetary gear.

10. A vehicle, characterized in that, Including the brake according to any one of claims 1-9, for braking the vehicle.

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