Electric wheel

Abstract

The application relates to an electric wheel and belongs to the technical field of electric wheels. The electric wheel comprises an electric wheel body, a wheel hub motor, a servo motor and a force transmission device, the force transmission device is connected with the servo motor and the wheel hub motor respectively, the wheel hub motor is connected with the electric wheel body and used for driving the electric wheel body to move, and the force transmission device is used for transmitting damping force output by the servo motor to the wheel hub motor. The electric wheel adopts the force transmission device to transmit the damping force to the wheel hub motor, the wheel hub motor vibration is inhibited through the damping force, the active damping effect is achieved, and the damping effect on the wheel hub motor is enhanced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric wheels, in particular to an electric wheel. BACKGROUND

[0002] The wheel hub motor technology is a technology that installs a wheel hub motor in a wheel and directly drives the wheel of an electric vehicle by the wheel hub motor. The technology improves the power conversion efficiency between the motor and the wheel and greatly simplifies the mechanical part of the electric vehicle and saves the space in the vehicle cabin. During the driving of the electric vehicle, the wheel will vibrate, and the vibration of the wheel will be transmitted to the wheel hub motor, thereby affecting the working performance and service life of the wheel hub motor. In order to suppress the wheel vibration, in the prior art, a spring damper or the like is usually installed to suppress the wheel hub motor vibration. However, the spring damper or the like can only play a passive damping role, and the damping effect is limited. SUMMARY

[0003] Therefore, it is necessary to provide an electric wheel capable of enhancing the damping effect in view of the above technical problems.

[0004] In a first aspect, the present application provides an electric wheel, which comprises an electric wheel body, a wheel hub motor, a servo motor, and a force transmission device, the force transmission device being connected with the servo motor and the wheel hub motor respectively, the wheel hub motor being connected with the electric wheel body and used to drive the electric wheel body to move; and the force transmission device is used to transmit the damping force output by the servo motor to the wheel hub motor.

[0005] In one of the embodiments, the force transmission device comprises a reducer and a sliding block; the sliding block comprises a stator through hole, and part of the structure of the stator of the wheel hub motor is located in the stator through hole; the reducer is connected with the servo motor, and the reducer is used to drive the sliding block to slide under the driving of the servo motor.

[0006] In one of the embodiments, the electric wheel further comprises a sliding rail matched with the sliding block, and the sliding rail is fixedly connected with an inner wheel frame included in the electric wheel body; and the sliding block is used to slide along the sliding rail under the driving of the reducer.

[0007] In one of the embodiments, the force transmission device further comprises a ball screw and a push block, one end of the ball screw is connected with the reducer, the other end of the ball screw is threadedly connected with the push block, and the push block is connected with the sliding block.

[0008] In one of the embodiments, the force transmission device further comprises a first clutch, and one end of the ball screw is connected with the reducer through the first clutch.

[0009] In one of the embodiments, a passive damping device is arranged between the sliding block and the inner wheel frame included in the electric wheel body.

[0010] In one of the embodiments, the passive damping device comprises a spring and a damping member.

[0011] In one of the embodiments, the electric wheel further comprises a brake caliper, a brake disc, and a push rod connected with the speed reducer; the push rod is used to move under the drive of the speed reducer to drive the brake caliper to clamp the brake disc.

[0012] In one of the embodiments, the electric wheel further comprises a second clutch, and the push rod is connected with the speed reducer through the second clutch.

[0013] In one of the embodiments, the electric wheel further comprises a hydraulic oil pipe and a brake caliper piston, and the push rod is connected with the brake caliper piston through the hydraulic oil pipe; the push rod pushes the liquid in the hydraulic oil pipe, and the liquid in the hydraulic oil pipe generates a pushing force acting on the brake caliper piston to push the brake caliper piston to move; the brake caliper piston is used to push the brake caliper to clamp the brake disc.

[0014] In one of the embodiments, the rotor of the wheel hub motor is connected with the hub comprised in the electric wheel body.

[0015] In one of the embodiments, the electric wheel body further comprises an outer wheel frame, a bearing, a bearing inner ring pressing plate, and a bearing outer ring pressing plate; the outer wheel frame is connected with the inner wheel frame comprised in the electric wheel body through the bearing, and the bearing inner ring pressing plate and the bearing outer ring pressing plate are used to fix the bearing between the outer wheel frame and the inner wheel frame.

[0016] In one of the embodiments, the servo motor is used to be connected with an external processing device and work according to a control signal output by the external processing device.

[0017] In the second aspect, the application provides a vehicle, which comprises the electric wheel of any one of the first aspect.

[0018] The technical scheme provided by the embodiments of the application has at least the following beneficial effects:

[0019] The electric wheel provided by the embodiments of the application comprises an electric wheel body, a wheel hub motor, a servo motor, and a force transmission device; the force transmission device is connected with the servo motor and the wheel hub motor respectively; the wheel hub motor is connected with the electric wheel body and used to drive the electric wheel body to move; and the force transmission device is used to transmit the damping force output by the servo motor to the wheel hub motor. Compared with the passive damping in the prior art, the embodiments of the application transmit the damping force to the wheel hub motor through the force transmission device, suppress the vibration of the wheel hub motor through the damping force, and have the effect of active damping, thereby enhancing the damping effect on the wheel hub motor. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1A structural schematic diagram of an electric wheel provided for an embodiment of the present application;

[0021] Figure 2 A structural schematic diagram of an electric wheel provided for an embodiment of the present application;

[0022] Figure 3 A structural schematic diagram of an electric wheel provided for an embodiment of the present application;

[0023] Figure 4 A structural schematic diagram of an electric wheel provided for an embodiment of the present application;

[0024] Electric wheel body 101;

[0025] Wheel hub motor 102;

[0026] Servo motor 103;

[0027] Force transmission device 104;

[0028] Speed reducer 105;

[0029] Ball screw 106;

[0030] Push block 107;

[0031] First clutch 108;

[0032] Slide block 109;

[0033] Slide rail 110;

[0034] Stator 111;

[0035] Spring 112;

[0036] Damping member 113;

[0037] Brake caliper 114;

[0038] Brake disc 115;

[0039] Push rod 116;

[0040] Hydraulic oil pipe 117;

[0041] Brake caliper piston 118;

[0042] Second clutch 119;

[0043] Brake caliper support frame 120;

[0044] Rotor 121;

[0045] Wheel hub 122;

[0046] Outer wheel frame 123;

[0047] Bearing 124;

[0048] Bearing inner ring pressing plate 125;

[0049] Bearing outer ring pressing plate 126;

[0050] Coupling 127;

[0051] Tire 128;

[0052] Inner wheel frame 129;

[0053] Stator through hole 130. DETAILED DESCRIPTION

[0054] In order to make the purposes, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not intended to limit the present application.

[0055] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0056] In addition, the terms "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0057] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0058] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature "over", "above" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the first feature is higher in horizontal height than the second feature. The first feature "under", "below" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the first feature is lower in horizontal height than the second feature.

[0059] It should be noted that when an element is referred to as being "fixed to" or "set to" another element, it can be directly on the other element or there can be an intermediate element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there can be an intermediate element. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation.

[0060] The wheel hub motor technology is a technology of installing a wheel hub motor in a wheel and directly driving the wheel of an electric vehicle by the wheel hub motor, which improves the power conversion efficiency between the motor and the wheel and greatly simplifies the mechanical part of the electric vehicle and saves the space in the vehicle cabin. During the driving of the electric vehicle, the wheel will vibrate, and the vibration of the wheel will be transmitted to the wheel hub motor, thereby affecting the working performance and service life of the wheel hub motor. In order to suppress the wheel vibration, in the prior art, a spring damper or the like is usually installed to suppress the wheel hub motor vibration. However, the spring damper or the like can only play a passive damping role, and the damping effect is limited.

[0061] Therefore, the electric wheel provided by the embodiments of the present application can suppress the wheel hub motor vibration based on the actively generated damping force, and the damping effect on the wheel hub motor is enhanced compared with the prior art.

[0062] Please refer to Figure 1 which shows a structural schematic diagram of an electric wheel 10 provided by the embodiments of the present application, as Figure 1 shown, the electric wheel 10 can include an electric wheel body 101, a wheel hub motor 102, a servo motor 103 and a force transmission device 104.

[0063] The force transmission device 104 is connected with the servo motor 103 and the wheel hub motor 102 respectively, the wheel hub motor 102 is connected with the electric wheel body 101, and is used for driving the electric wheel body 101 to move; the force transmission device 104 is used for transmitting the damping force output by the servo motor 103 to the wheel hub motor 102. Optionally, the servo motor 103 is used as a kind of engine to control the operation of mechanical elements, and can control the force transmission device 102 to transmit the damping force output by the servo motor 103 to the wheel hub motor 102.

[0064] When the electric wheel is actually running on the road, the uneven road surface will cause the vibration of the electric wheel 10 in the vertical direction, wherein the vertical direction refers to the direction perpendicular to the movement direction of the electric wheel 10, of course, the wheel hub motor 102 inside the electric wheel 10 will also vibrate due to the vibration of the electric wheel 10. In order to suppress the vibration of the wheel hub motor 102, the electric wheel 10 of the embodiment of the application is provided with a servo motor 103 and a force transmission device 104. The servo motor 103 can transmit the damping force generated by itself to the wheel hub motor 102 based on the force transmission device 102. Optionally, the damping force can be a force opposite to the vibration direction of the wheel hub motor 102. Thus, the damping force can weaken the force in the vibration direction, or even offset the force in the vibration direction, thereby achieving the effect of active damping and suppressing the vibration of the electric wheel 10 in the vertical direction. For example, the wheel hub motor 102 vibrates upward under the driving of the electric wheel 10, and the force transmission device 102 transmits the downward damping force output by the servo motor 103 to the wheel hub motor 102. Thus, the upward vibration force and the downward damping force interact with each other, thereby suppressing the vibration of the electric wheel 10 in the vertical direction.

[0065] It should be noted that the damping force in the embodiment of the application can be a force, or a combination of multiple forces with damping effect. The embodiment of the application does not limit this, as long as the damping effect can be achieved.

[0066] The embodiment of the application provides an electric wheel 10, which comprises an electric wheel body 101, a wheel hub motor 102, a servo motor 103 and a force transmission device 104. The force transmission device 104 is connected with the servo motor 103 and the wheel hub motor 102 respectively, the wheel hub motor 102 is connected with the electric wheel body 101, and is used for driving the electric wheel body 101 to move; the force transmission device 104 is used for transmitting the damping force output by the servo motor 103 to the wheel hub motor 102. Compared with the passive damping of the prior art, the embodiment of the application transmits the damping force to the wheel hub motor 102 through the force transmission device 104, and suppresses the vibration of the wheel hub motor 102 through the damping force, thereby achieving the effect of active damping and enhancing the damping effect on the wheel hub motor 102.

[0067] Please refer to Figures 2 to 4Fig. 1 shows a structural schematic diagram of an electric wheel 10 provided by an embodiment of the present application, the electric wheel 10 having a function of active vibration reduction. As shown in Fig. 1, the electric wheel 10 of the active vibration reduction function comprises a force transmission device 104, the force transmission device 104 comprising a speed reducer 105, a ball screw 106, a push block 107, a first clutch 108, and a sliding block 109, the sliding block 109 comprising a stator through hole 130, and the electric wheel 10 further comprises a sliding rail 110 cooperating with the sliding block 109. Figures 2 to 4

[0068] Part of a structure of the stator 111 of the wheel hub motor 102 is located in the stator through hole 130, the speed reducer 105 is connected with the servo motor 103, the speed reducer 105 is used to drive the sliding block 109 to slide under the driving of the servo motor 103, the sliding rail 110 is fixedly connected with the inner wheel frame 129 comprised by the electric wheel body 101, and the sliding block 109 is used to slide along the sliding rail 110 under the driving of the speed reducer 105, one end of the ball screw 106 is connected with the speed reducer 105, the other end of the ball screw 106 is threadedly connected with the push block 107, and the push block 107 is connected with the sliding block 109. One end of the ball screw 106 is connected with the speed reducer 105 through the first clutch 108.

[0069] In the embodiment of the present application, the servo motor 103 outputs a torque, the speed reducer 105 drives the ball screw 106 to rotate under the driving of the torque of the servo motor 103, the rotation of the ball screw 106 drives the push block 107 to move in the vertical direction, the push block 107 drives the sliding block 109 to slide up and down on the sliding rail 110, and because part of the structure of the stator 111 is located in the stator through hole 130, the sliding block 109 will give the stator 111 a thrust in the vertical direction when the sliding block 109 slides on the sliding rail 110, the thrust can suppress the vibration of the wheel hub motor 102 in the vertical direction, and the active vibration reduction effect is achieved. Alternatively, the damping force in the embodiment of the present application can be a combination of the torque output by the servo motor 103, the force of the push block 107 driven by the ball screw 106 to move in the vertical direction, the force of the sliding block 109 driven by the push block 107 to slide up and down on the sliding rail 110, and the thrust of the sliding block 109 in the vertical direction to the stator 111, and under the joint action of these combined forces, the vibration of the wheel hub motor 102 in the vertical direction is suppressed, and the active vibration reduction effect is achieved.

[0070] Alternatively, the speed reducer 105 can increase the torque output by the servo motor 103, improve the force of the push block 107 driving the sliding block 109 to slide up and down on the sliding rail 110, and further increase the thrust of the sliding block 109 in the vertical direction to the stator 111, so as to suppress the movement of the stator 111 in the vertical direction by the increased thrust, and achieve the active vibration reduction effect.

[0071] ​It should be noted that one end of the ball screw 106 is connected with the speed reducer 105 through the first clutch 108, and the first clutch 108 can cut off the torque transmitted by the servo motor 103 to the ball screw 106. In the case where it is necessary to reduce the thrust of the slider 109 to the given stator 111, the torque transmitted by the servo motor 103 to the ball screw 106 can be cut off by controlling the first clutch 108, thereby reducing the thrust of the slider 109 to the given stator 111.

[0072] Optionally, the ball screw 106 and the push block 107 included in the force transmission device 104 can be replaced by a gear and rack type, or other structures, and the embodiments of the present application do not limit this. As long as the structure replacing the ball screw and the push block can drive the slider to slide up and down on the slide rail 110.

[0073] In the optional embodiments of the present application, in addition to the function of active damping, the electric wheel 10 can also have the function of passive damping. Optionally, the passive damping function of the electric wheel 10 is correspondingly provided with a passive damping device. Optionally, the passive damping device can be arranged between the slider 109 and the inner wheel frame 129 included in the electric wheel body 101. The passive damping device can include a spring 112 and a damping member 113, as shown in Figures 2 to 4 The two springs 112 and the two damping members 113 are arranged between the slider 109 and the inner wheel frame 129. One spring 112 and one damping member 113 are arranged at one end of the slider 109, and the other spring 112 and the other damping member 113 are arranged at the other end of the slider 109. Since part of the structure of the stator 111 is located in the stator through hole 130 of the slider 109, the wheel hub motor 102 is suspended in the electric wheel based on the spring 112 and the damping member 113. The spring 112 and the damping member 113, as devices with buffering effect, have the effect of passive damping, can attenuate the vibration of the wheel hub motor 102 in the vertical direction, improve the stress condition of the wheel hub motor 102, and suppress the vibration of the wheel hub motor 102, so as to avoid the wheel hub motor 102 from being damaged to a certain extent and prolong the service life of the wheel hub motor 102. In addition, by suspending the wheel hub motor 102 in the electric wheel through the spring 112 and the damping member 113, the unsprung mass of the vehicle provided with the electric wheel can be reduced, and the riding comfort of the vehicle can be improved.

[0074] Please refer to Figures 2 to 4 , which shows a structure schematic diagram of an electric wheel 10 provided by the embodiments of the present application, and the electric wheel 10 has the function of electric control braking. As shown in Figures 2 to 4 , the electric wheel 10 with the function of electric control braking includes a brake caliper 114, a brake disc 115, a push rod 116 connected with the speed reducer 105, a hydraulic oil pipe 117, a brake caliper piston 118, and a second clutch 119.

[0075] The push rod 116 is connected with the decelerator 105 through the second clutch 119, and the push rod 116 is connected with the brake caliper piston 118 through the hydraulic oil pipe 117. Optionally, the push rod 116 can be used to move under the drive of the decelerator 105 to drive the brake caliper 114 to clamp the brake disc 115. Specifically, the push rod 116 pushes the liquid in the hydraulic oil pipe 117, the liquid in the hydraulic oil pipe 117 generates a pushing force acting on the brake caliper piston 118, which is used to push the brake caliper piston 118 to move, and the brake caliper piston 118 is used to push the brake caliper 114 to clamp the brake disc 115.

[0076] In the embodiment of the present application, the servo motor 103 outputs torque, the decelerator 105 is connected with the servo motor 103 and drives the push rod 116 to move under the drive of the servo motor 103, the push rod 116 pushes the liquid in the hydraulic oil pipe 117, so that the liquid in the hydraulic oil pipe 117 generates a pushing force, and the pushing force acts on the brake caliper piston 118 to make the brake caliper piston 118 move, and the movement of the brake caliper piston 118 can push the brake caliper 114 to clamp the brake disc 115, thereby achieving the effect of electric control braking.

[0077] Please refer to Figures 2 to 4 , which shows a structural schematic diagram of an electric wheel 10 provided by the embodiment of the present application, and the electric wheel 10 has the functions of electric control braking and active damping. As Figures 1 to 4 shown, the electric wheel 10 can include an electric wheel body 101, a wheel hub motor 102, a servo motor 103, a force transmission device 104, a sliding rail 110 cooperating with a sliding block 109, a passive damping device, a brake caliper 114, a brake disc 115, a push rod 116 connected with a decelerator 105, a hydraulic oil pipe 117, a brake caliper piston 118, a second clutch 119, a brake caliper support frame 120, a shaft coupling 127 and a tire 128. The force transmission device 104 includes the decelerator 105, a ball screw 106, a push block 107, a first clutch 108 and the sliding block 109. The sliding block 109 includes a stator through hole 130. The wheel hub motor 102 includes a stator 111 and a rotor 121. The passive damping device includes a spring 112 and a damping member 113. The electric wheel body 101 includes a wheel hub 122, an outer wheel frame 123, a bearing 124, a bearing inner ring pressing plate 125, a bearing outer ring pressing plate 126 and an inner wheel frame 129.

[0078] The force transmission device 104 is connected with the servo motor 103 and the wheel hub motor 102 respectively, the wheel hub motor 102 is connected with the electric wheel body 101, and is used to drive the electric wheel body 101 to move; the force transmission device 104 is used to transmit the damping force output by the servo motor 103 to the wheel hub motor 102. Part of the structure of the stator 111 of the wheel hub motor 102 is located in the stator through hole 130, the speed reducer 105 is connected with the servo motor 103, and the speed reducer 105 is used to drive the sliding block 109 to slide under the driving of the servo motor 103; the sliding rail 110 is fixedly connected with the inner wheel frame 129 included in the electric wheel body 101, and the sliding block 109 is used to slide along the sliding rail 110 under the driving of the speed reducer 105; one end of the ball screw 106 is connected with the speed reducer 105, the other end of the ball screw 106 is threadedly connected with the push block 107, the push block 107 is connected with the sliding block 109, one end of the ball screw 106 is connected with the speed reducer 105 through the first clutch 108, the push rod 116 is connected with the speed reducer 105 through the second clutch 119, the push rod 116 is connected with the brake caliper piston 118 through the hydraulic oil pipe 117, and the push rod 116 can be used to move under the driving of the speed reducer 105 to drive the brake caliper 114 to clamp the brake disc 115.

[0079] The rotor 121 of the wheel hub motor 102 is connected with the wheel hub 122 included in the electric wheel body 101, the outer wheel frame 123 is connected with the inner wheel frame 129 included in the electric wheel body 101 through the bearing 124, the bearing inner ring pressing plate 125 and the bearing outer ring pressing plate 126 are used to fix the bearing 124 between the outer wheel frame 123 and the inner wheel frame 129, the brake caliper support frame 120 is used to fix the brake caliper 114 on the inner wheel frame 129, the rotor 121 is connected with the wheel hub 122 through the shaft coupling 127, the bearing 124 can keep the inner wheel frame 129 stationary in the process of rotating the wheel hub 122, the shaft coupling 127 is used to transmit the torque generated by the rotor 121 to the wheel hub 122 to drive the electric wheel body 101 to move, and can realize the movement of the wheel hub motor 102 in the vertical direction, optionally, the shaft coupling 127 can be a cross slider type shaft coupling, or can be a parallel eccentric shaft coupling, for example, Figure 3 The shaft coupling 127 in the parallel eccentric shaft coupling, the implementation mode of the shaft coupling 127 is not limited in the embodiment of the application, as long as the rotor 121 and the wheel hub 122 can be connected, and the torque generated by the rotor 121 can be transmitted to the wheel hub 122 to drive the electric wheel body 101 to move.

[0080] In an optional embodiment of the present application, the servo motor 102 can also be used to connect with an external processing device and work according to the control signal output by the external processing device. Optionally, the external processing device can be a processor or a computer device with data processing and storage functions, and the type of the external processing device is not limited in the embodiments of the present application. Optionally, a vibration sensor can be arranged in the electric wheel, and the value monitored by the vibration sensor can be transmitted to the external processing device. The external processing device determines whether the active damping function needs to be started according to the value. For example, when the value is greater than a preset vibration threshold, the external processing device can start the active damping function, output control information to the servo motor 102, control the damping force output by the servo motor 102, and conduct the damping force to the hub motor to suppress the vibration of the hub motor 102 in the vertical direction, so as to achieve the damping effect.

[0081] In the embodiments of the present application, in order to make the active damping function and the electric brake control function of the electric wheel not conflict with each other, the two output shafts of the speed reducer 105 are connected with the first clutch 108 and the second clutch 119 respectively, and the first clutch 108 and the second clutch 119 can cut off the power transmitted by the servo motor 103 to the ball screw 106 and the push rod 116 respectively. In the embodiments of the present application, the active damping function and the electric brake control function of the electric wheel share the same servo motor 103 and speed reducer 105, which saves the space in the wheel of the electric wheel, reduces the unsprung mass of the vehicle, and improves the smoothness of the vehicle. In general, the electric wheel provided in the embodiments of the present application reasonably utilizes the remaining space in the wheel, integrates the active damping function and the electric brake control function, optimizes the smoothness, and reduces the unsprung mass of the vehicle as much as possible.

[0082] In one of the embodiments of the present application, a vehicle is provided, which includes the electric wheel described above, and the structure and advantages of the electric wheel have been described in detail in the above embodiments, which will not be described herein.

[0083] The technical features of the above-described embodiments can be combined arbitrarily. In order to make the description concise, all possible combinations of the technical features in the above-described embodiments are not described, however, as long as the combinations of the technical features do not exist contradictory, they should be considered as the scope of the present application.

[0084] The above-described embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the scope of the patent. It should be pointed out that, for those skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are all within the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. An electric wheel, characterized in that, The electric wheel comprises an electric wheel body, a wheel hub motor, a servo motor and a force transmission device, the force transmission device is connected with the servo motor and the wheel hub motor respectively, the wheel hub motor is connected with the electric wheel body and used to drive the electric wheel body to move; The force transmission device is used to transmit the damping force output by the servo motor to the wheel hub motor; The force transmission device comprises a speed reducer and a sliding block, the sliding block comprises a stator through hole, part of structure of a stator of the wheel hub motor is located in the stator through hole, the speed reducer is connected with the servo motor, and the speed reducer is used to drive the sliding block to slide under the driving of the servo motor; The electric wheel further comprises a sliding rail matched with the sliding block, the sliding rail is fixedly connected with an inner wheel frame comprised by the electric wheel body, and the sliding block is used to slide along the sliding rail under the driving of the speed reducer; The force transmission device further comprises a ball screw, a push block and a first clutch, one end of the ball screw is connected with the speed reducer through the first clutch, the other end of the ball screw is threadedly connected with the push block, and the push block is connected with the sliding block; the ball screw is used to move under the driving of the speed reducer; and the push block is used to drive the sliding block to slide under the movement of the ball screw; A passive damping device is arranged between the sliding block and the inner wheel frame comprised by the electric wheel body, and the passive damping device comprises a spring and a damping member.

2. The electric wheel of claim 1, wherein, The electric wheel further comprises a brake caliper, a brake disc, a second clutch and a push rod connected with the speed reducer; The push rod is used to move under the driving of the speed reducer so as to drive the brake caliper to clamp the brake disc.

3. The electric wheel of claim 2, wherein, The electric wheel further comprises a hydraulic oil pipe and a brake caliper piston, and the push rod is connected with the brake caliper piston through the hydraulic oil pipe; The push rod pushes the liquid in the hydraulic oil pipe, and the liquid in the hydraulic oil pipe generates a pushing force acting on the brake caliper piston so as to push the brake caliper piston to move; The brake caliper piston is used to push the brake caliper to clamp the brake disc.

4. The electric wheel of claim 1, wherein, A rotor of the wheel hub motor is connected with a wheel hub comprised by the electric wheel body, the electric wheel body further comprises an outer wheel frame, a bearing, a bearing inner ring pressing plate and a bearing outer ring pressing plate, the outer wheel frame is connected with the inner wheel frame comprised by the electric wheel body through the bearing, and the bearing inner ring pressing plate and the bearing outer ring pressing plate are used to fix the bearing between the outer wheel frame and the inner wheel frame.

5. The electrically motorized wheel of claim 1, wherein, The servo motor is used to be connected with an external processing device and work according to a control signal output by the external processing device.

6. A vehicle, characterized by The vehicle comprises the electric wheel according to any one of claims 1-5.

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