Solution of new energy automobile

Abstract

The new energy automobile comprises a new energy automobile, an electric driving device and an automobile main control board, the electric driving device comprises a hub motor and a speed measuring coil, and the hub motor comprises a rotating shaft, a stator, a rotor and two planetary speed reducing structures; the two planetary speed reduction structures are symmetrically arranged on the two sides of the rotor, each planetary speed reduction structure comprises a planetary support, a plurality of planetary gears, a sun gear, an outer gear ring and a machine shell, the planetary supports are fixed to the rotating shaft, the planetary gears rotate on the planetary supports at intervals in the circumferential direction of the rotating shaft, one end of each sun gear is fixedly connected with the rotor, and the other end of each sun gear is meshed with the corresponding planetary gear. The planet gear is meshed with the outer gear ring; the speed measuring coil is installed on the stator in a detection mode, and the automobile main control board is in communication connection with the speed measuring coil. The two planetary reduction structures are symmetrically arranged on the two sides of the planetary reduction structure, the weight of the hub motor driving wheel is reduced on the premise that the clutch function is stable, and the space in a hub and the manufacturing cost are saved.

Description

Technical Field

[0001] This application belongs to the technical field of new energy vehicles, and particularly relates to a solution for new energy vehicles. Background Art

[0002] With the continuous upgrading of automotive industrial technology, in order to reduce energy consumption and pollution emissions, electric vehicles, i.e., new energy vehicles, are chosen by more people as economical and environmentally friendly means of transportation. The existing new energy vehicles that use batteries to drive electric motors are just vehicles that replace internal combustion engines with electric motors. Behind the electric motor are in sequence a clutch - gearbox - drive shaft - differential - drive wheels, etc. The internal combustion engine is replaced by an electric motor, and gasoline or diesel is replaced by a battery. Since a series of speed reduction and transmission mechanisms such as a gearbox, differential, and drive shaft are still needed as in traditional vehicles, most of the space of the new energy vehicle chassis is occupied. Moreover, since the operation of the motor shaft drives the operation of these components and other related components, the transmission efficiency loss is relatively large. Summary of the Invention

[0003] The technical problem to be solved by the present invention is: to solve the deficiencies in the prior art that the battery - driven electric motor of new energy vehicles occupies most of the chassis space and has a large transmission efficiency loss, so as to provide a solution for new energy vehicles.

[0004] The technical solution adopted by the present invention to solve its technical problems is:

[0005] A solution for new energy vehicles, including a new energy vehicle, an electric drive device that drives the four wheels of the front and rear axles of the new energy vehicle, a vehicle main control board, and a steering gear. The electric drive device includes a hub motor and a speed - measuring coil. The hub motor includes a rotating shaft, a stator, a rotor, two sets of planetary reduction structures, and a housing. The rotating shaft, stator, rotor, and two sets of planetary reduction structures are all located inside the housing. The stator is fixedly arranged on the rotating shaft, the rotor is rotatably installed outside the stator, and the stator generates electromagnetic force to drive the rotor to rotate. The rotor is rotatably arranged on the rotating shaft through a tapered roller bearing.

[0006] The two sets of planetary reduction structures are symmetrically arranged on both sides of the rotor. Each set of planetary reduction structures includes a planetary carrier, several planetary gears, a sun gear, and an external gear ring. The planetary carrier is fixed on the rotating shaft, and the axis of the planetary carrier coincides with that of the rotating shaft. Several planetary gears are rotatably spaced along the circumference of the rotating shaft on the planetary carrier. One end of the sun gear is fixedly connected to the rotor, and the other end meshes with the planetary gears. The planetary gears mesh with the external gear ring, and the external gear ring is fixed inside the housing. The housing is installed on the rotating shaft through a tapered roller bearing. Bearing pads and oil seals are sequentially arranged on the outer side of the tapered roller bearing. The bearing pads are fixed on the rotating shaft through fastening screws and nuts. The purpose of setting the oil seal is to prevent the engine oil from leaking out.

[0007] The speed measurement coil is installed on the stator of the motor. When the magnetic field of the magnet on the motor rotor sweeps across the speed measurement coil, a speed signal is generated and added to the main control board to control the rotation speed of the wheels. The differential signal is taken from the steering gear. When turning left or right, the front two wheels swing left and right as the steering wheel turns. This swing of the front wheels to the right is converted into a differential signal and added to the main control board. When steering, the main control board controls the wheels to rotate differentially. Generally speaking, when an automobile steers, two circular lines are drawn with a point as the center. The outer line is longer than the inner line. That is to say, in the same time, the outer wheels of the automobile rotate faster than the inner wheels. This is the differential during steering. When steering, the rotation speeds of the two sides of the wheels are different, and the data fed back by the speed measurement coil is also different. Through adjustment by the main control board, the rotation speeds of the two sides of the wheels can be made consistent, so that the automobile will not deviate from the straight line.

[0008] The two wheels are not affected by the road conditions and maintain straight driving.

[0009] Symmetrically arranged on both sides of the planetary reduction structure, it reduces the weight of the hub motor drive wheel on the premise of ensuring stable clutch function, saves the space inside the hub and manufacturing cost.

[0010] Furthermore, it also includes a planetary gear shaft. The planetary gear shaft is fixed to the planetary bracket through a plurality of locking nuts, and planetary gears are rotatably installed at opposite ends of the planetary gear shaft.

[0011] Furthermore, the planetary bracket is fixed to the rotating shaft through a locking nut. There are several locking nuts, which are radially arranged between the planetary bracket and the rotating shaft.

[0012] Furthermore, it also includes a sliding key, a keyway, a tension spring, a spring sleeve, and a connecting ring. The connecting ring is sleeved between the housing and the rotor, and there is a gap between them. Both ends of the connecting ring are provided with support frames. The support frames rotate on the rotating shaft located between the planetary gear and the rotor. The sun gear is installed on the side of the support frame close to the planetary gear;

[0013] The spring sleeve is fixed on the rotor. One end of the tension spring is installed inside the spring sleeve, and the other end is installed with the sliding key. The keyway is opened in the connecting ring, and the position of the keyway corresponds to that of the sliding key;

[0014] Among them, in the initial state, part of the sliding key is located inside the spring sleeve.

[0015] Among them, multiple groups of the sliding key, the keyway, the tension spring, and the spring sleeve are provided, and they are arranged at intervals along the circumferential direction of the rotating shaft.

[0016] Among them, the spring sleeve is fixed on the side of the rotor or the outer surface of the rotating shaft. Both ends of the sliding key are of a triangular prism structure that is easy to insert into the keyway, that is, the top of the sliding key is triangular when viewed from the side, and the keyway matches the shape of the sliding key.

[0017] Further, it further includes a coil bracket, a magnetic induction coil, a sliding pin, a sliding pin positioning hole, and a return spring. The pin positioning hole is opened on the planetary bracket. The planetary bracket is installed on the rotating shaft through a sliding bearing. The coil bracket is fixedly installed on the rotating shaft. The magnetic induction coil is installed on the coil bracket. An installation groove for installing the return spring is opened at one end of the magnetic induction coil close to the rotor. One end of the sliding pin is located in the installation groove and is connected to the return spring, and the other end can be inserted into the sliding pin positioning hole.

[0018] Among them, multiple groups of the coil bracket, the magnetic induction coil, the sliding pin, the sliding pin positioning hole, and the return spring are provided and are arranged at intervals along the circumferential direction of the rotating shaft.

[0019] Among them, the coil bracket is a disc bracket, and a circular hole connected to the rotating shaft is opened in the center. The coil bracket is fixed on the rotating shaft through a plurality of locking nuts.

[0020] Further, the planetary bracket is a disc bracket, and a circular hole connected to the rotating shaft is opened in the center.

[0021] The beneficial effects of the present invention are as follows:

[0022] 1. Integrate the in-wheel motor and the planetary gear reducer into one, delete the structures such as the reduction gearbox, the transmission shaft, and the differential in the traditional new energy vehicle, can remove the complex mechanical transmission device, can greatly save space, and also remove the power loss caused thereby. The product of the present invention will constitute a new energy vehicle with low cost and low energy consumption, which is very promising.

[0023] 2. The drive wheels of the new energy vehicle are independent of each other. The in-wheel motors of the drive wheels are connected to the vehicle main control board through power lines. The speed measurement coils are connected to the main control board to feedback the speeds of each wheel of the vehicle, and the differential signal is taken out from the steering gear, so that each driving wheel of the vehicle obtains its own differential drive. During driving, when the road conditions on both sides are different, it can be adjusted by the main control board to make the speeds of the wheels on both sides of the vehicle consistent, and the vehicle can keep going straight.

[0024] 3. Integrating the in-wheel motor and the planetary gear reducer into one has three different structural parts: without a clutch, with a centrifugal clutch, and with an electromagnetic clutch, and is more flexible to use.

[0025] 4. The centrifugal clutch provided can be connected to the rotor only through centrifugal force and be driven to operate. The electromagnetic clutch provided can be connected to the rotor only after being energized and be driven to operate. For high-load operation, such a structural design can first drive the rotor and the stator to operate at zero load, and then drive the whole structure to operate through the centrifugal clutch or the electromagnetic clutch. In this way, the motor does not have a starting current several times that of a normal working motor, greatly saving resources. Description of the Drawings

[0026] The technical solution of the present application will be further described below in conjunction with the accompanying drawings and embodiments.

[0027] Figure 1 It is a schematic cross-sectional structure diagram of Embodiment 1 of the present application;

[0028] Figure 2 It is a schematic diagram of the planetary reduction structure of the embodiment of the present application;

[0029] Figure 3 It is a schematic cross-sectional structure diagram of Embodiment 2 of the present application;

[0030] Figure 4 It is a schematic diagram of the structure when the sliding key is inserted into the key slot in Embodiment 2 of the present application;

[0031] Figure 5 It is a schematic cross-sectional structure diagram of Embodiment 3 of the present application;

[0032] Figure 6 It is a schematic diagram of the structure of the oil seal of the present application.

[0033] The reference numerals in the figure are:

[0034] 10, hub motor; 11, rotating shaft; 12, stator; 13, rotor; 14, planetary reduction structure; 141, planetary carrier; 142, planetary gear; 143, sun gear; 144, external gear ring; 145, end cover; 146, planetary gear rotating shaft; 15, tapered roller shaft; 16, oil seal; 17, bearing pad; 18, fastening screw nut; 20, speed measuring coil; 30, sliding key; 31, key slot; 32, tension spring; 33, spring sleeve; 34, connecting ring; 35, support frame; 50, coil support; 51, magnetic induction coil; 52, sliding pin; 53, sliding pin positioning hole; 54, return spring; 55, installation groove. Detailed implementation manners

[0035] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

[0036] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It 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. Therefore, it should not be construed as a limitation on the protection scope of the present application. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "plurality" is two or more.

[0037] In the description of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "mounted", "connected", "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood through specific circumstances.

[0038] The technical solution of the present application will be described in detail below with reference to the drawings and in combination with embodiments.

[0039] Embodiment

[0040] Embodiment 1

[0041] Combined body Figure 1 - Figure 2, this embodiment provides a solution for a new energy vehicle, specifically including a new energy vehicle, an electric drive device that drives the four wheels of the front and rear axles of the new energy vehicle, and a vehicle main control board. The electric drive device includes a hub motor 10 and a speed measuring coil 20. The hub motor 10 includes a motor, a rotating shaft 11, a stator 12, a rotor 13, two sets of planetary reduction structures 14, and a housing 145; the motor drives the rotating shaft to rotate, the stator 12 is fixedly arranged on the rotating shaft 11, the rotor 13 is rotatably installed outside the stator 12, and the stator 12 generates an electromagnetic force to drive the rotor 13 to rotate. The rotor 13 is rotatably arranged on the rotating shaft 11 through a tapered roller shaft 15. Bearing pads 17 and oil seals 16 are sequentially arranged on the outer side surfaces of the tapered roller bearings 15. The bearing pads 17 are fixed on the rotating shaft 11 through fastening screws and nuts 18. The oil seal 16 is installed between the rotating shaft 11 and the housing 145. The tapered roller bearings 15 of the vehicle wheels are split into two halves. The inner bearing race is in tight fit with the rotating shaft and needs to be pressed in. The tapered roller bearing 15 is made into a tapered roller bearing 15 bracket and can be removed separately. The outer bearing race is in tight fit with the housing 145 and also needs to be pressed in. When the vehicle is maintained, the tapered roller bearing 15 bracket is removed, butter is added, and then it is reinstalled. Since the hub motor is filled with engine oil inside, if there is no oil seal, the engine oil will run out;

[0042] Two sets of planetary reduction structures 14 are symmetrically arranged on both sides of the rotor 13. Each set of planetary reduction structures 14 includes a planetary bracket 141, several planetary gears 142, a sun gear 143, an external gear ring 144, and a planetary gear rotating shaft 146. The planetary bracket 141 is a disc bracket with a circular hole in the center for connecting to the rotating shaft 11; the planetary bracket 141 is fixed on the rotating shaft 11, and the axis of the planetary bracket 141 coincides with that of the rotating shaft 11. The planetary gear rotating shaft 146 is fixed to the planetary bracket 141 through a plurality of locking nuts. Planetary gears 142 are rotatably installed at opposite ends of the planetary gear rotating shaft 146. Several planetary gears 142 are rotatably spaced along the circumference of the rotating shaft on the planetary bracket 141. There are at least three planetary gears 142. One end of the sun gear 143 is fixedly connected to the rotor 13, and the other end meshes with the planetary gears 142. The external gear ring 144 is fixed inside the housing 145, and the planetary gears 142 mesh with the external gear ring 144. In the case of using three planetary gears 142, the forces on each planetary gear 142 can be balanced, making the transmission of the planetary reduction structure 14 stable; the housing 145 is installed on the rotating shaft 11 through tapered roller bearings, and both ends of the end cover 145 are connected to the rotating shaft 11 through snap rings;

[0043] The planetary bracket 141 is fixed on the rotating shaft 11 through locking nuts. There are several locking nuts, which are radially arranged between the planetary bracket 141 and the rotating shaft 11;

[0044] The speed measurement coil is installed on the stator of the motor. When the magnetic field of the magnet on the motor rotor sweeps across the speed measurement coil, a speed signal is generated and added to the main control board to control the rotation speed of the wheels. The differential signal is taken from the steering gear. When turning left or right, the front two wheels swing left and right as the steering wheel turns. This swing of the front wheels to the right is converted into a differential signal and added to the main control board. When steering, the main control board controls the wheels to rotate differentially. To put it simply: When an automobile steers, two circular lines are drawn with a center point. The outer line is longer than the inner line. That is to say, in the same time, the outer wheels of the automobile rotate faster than the inner wheels. This is the differential during steering. The rotation speeds of the two sides of the wheels are different during steering. Therefore, when driving straight, the rotation speeds of the two sides of the automobile wheels are the same. When steering, the two sides of the wheels have a differential, and this differential is determined by the steering gear, that is, the steering angle of the steering wheel; each wheel of the automobile is independent and is uniformly controlled by the main control board 20 of the automobile. When the magnetic field of the magnet on the rotor sweeps across the speed measurement coil on the stator, a speed measurement signal is obtained. The steering gear adds this signal to the connection terminal of the main control board. When the automobile is driving, the road surface conditions passed by the wheels on both sides are different (such as a waterlogged road surface on one side and a dry road surface on the other side), and the data fed back by the speed measurement coil is also different. Through adjustment by the main control board, the rotation speeds of the two sides of the wheels can be made the same, so that the automobile will not deviate from the course.

[0045] The above structure constitutes the in-wheel motor 10 in a new energy vehicle without a clutch structure. The planetary reduction structure 20 can achieve the function of reducing speed and increasing torque, increasing the power output of the in-wheel motor 10, improving the stability of the power transmission process, and using a symmetric distribution to share the force generated during the power output of the in-wheel motor 10, avoiding damage caused by overloading of a single set of planetary reduction structures 20.

[0046] In the in-wheel motor drive, a wheel is installed at the output end of the rotating shaft. The stator 12 and the rotor 13 are the main components of the in-wheel motor. The stator 12 is provided with stator coils along the circumferential direction, and the rotor 13 is provided with rotor magnets along the circumferential direction. After being energized, the driving force generated by the in-wheel motor is transmitted to the housing 145 through two sets of planetary reduction structures 14, thereby causing the wheels to rotate.

[0047] In the planetary reduction structure 14, the sun gear 143 is connected to the rotor 13 as the driving wheel, and the sun gear 143 rotates with the rotation of the rotor 13. The planetary carrier 141 is fixedly installed on the rotating shaft 11 for fixedly installing the planetary gear 142. The planetary gear 142 is connected to the sun gear 143 and the external gear ring 144 as the driven wheel, thereby driving the wheels to rotate through the rotating shaft 11 with the driving force of the in-wheel motor.

[0048] Embodiment 2

[0049] In addition to the above structure, combined with Figure 3 - Figure 4, the product of the present invention also has a structure including a sliding key 30, a key groove 31, a tension spring 32, a spring sleeve 33, and a connecting ring 34 to form a hub motor structure with a centrifugal clutch. Specifically, the connecting ring 34 is sleeved between the housing 145 and the rotor 13 with a gap therebetween. Both ends of the connecting ring 34 are fixed with a support frame 35. The support frame 35 is a disc-shaped structure that can be a hollow or solid structure. The support frame 35 rotates on the rotating shaft between the planet gear 142 and the rotor 13. The support frame 35 is rotatably installed on the rotating shaft 11 through a bearing, and the sun gear 143 is rotatably installed on the side of the support frame 35 close to the planet gear 142;

[0050] The spring sleeve 33 is fixed on the rotor 13. One end of the tension spring 32 is installed in the spring sleeve 33. The spring sleeve 33 is used to fix the position of the spring sleeve 33. The other end of the tension spring 32 is fixedly connected to the sliding key 30. The key groove 31 is opened on the inner surface of the connecting ring 34. The position of the key groove 31 corresponds to that of the sliding key 30, facilitating partial insertion into the key groove 30 under the elastic deformation of the tension spring 32;

[0051] In the initial state, the sliding key 30 is partially located in the spring sleeve 33 to facilitate restricting the sliding of the sliding key 30. During use, the stator 12 rotates to generate centrifugal force. Since the rotating shaft 11 starts from rest, rotates slowly and finally rotates quickly, when the rotating shaft 11 just starts to rotate, under the centrifugal action, the sliding key 30 will be inserted into the key groove 31, driving the two sets of planetary reduction structures to rotate. Since the rotational speed is not strong at this time, subsequently, the sliding key 30 will fall off from the key groove 31 and then enter the next cycle, forming intermittent insertion into the key groove 31 to drive the two sets of planetary reduction structures to rotate, having a buffer period. When the rotational speeds of the two sets of planetary reduction structures are synchronized with the rotational speed of the rotating shaft 11, at this time, the sliding key 30 is completely inserted into the key groove 31 to achieve engagement, thus realizing the clutch function.

[0052] Multiple groups of the sliding key 30, the key groove 31, the tension spring 32, and the spring sleeve 33 are provided and arranged at intervals along the circumferential direction of the rotating shaft 11, and the number of groups is arranged according to the use requirements.

[0053] The spring sleeve 33 is fixed on the side surface of the rotor 13 or the outer surface of the rotating shaft 11. Both ends of the sliding key 30 are in the shape of a triangular prism that is easy to insert into the key groove 31. The key groove 31 is matched with the sliding key 30 for insertion. The design of the triangular prism shape of the sliding key 30 is to easily find the position of the key groove 31 and insert into it during rotation.

[0054] Embodiment 3

[0055] Combined with Figure 5, the product of the present invention may also be a hub motor 10 with an electromagnetic clutch, which further includes a coil bracket 50, a magnetic induction coil 51, a sliding pin 52, a sliding pin positioning hole 53, and a return spring 54 on the basis of the structure of the first embodiment. The sliding pin positioning hole 53 is opened on the planetary bracket 141. The planetary bracket 141 is installed on the rotating shaft 11 through a sliding bearing. The coil bracket 50 is fixedly installed on the rotating shaft 11. The magnetic induction coil 51 is installed on the coil bracket 50. An installation groove 55 for installing the return spring 54 is opened at one end of the magnetic induction coil 51 close to the rotor 13. One end of the sliding pin 52 is located in the installation groove 55 and is connected to the return spring 54, and the other end can be inserted into the sliding pin positioning hole 53. The coil bracket 50 is a disc bracket, and a circular hole connected to the rotating shaft 11 is opened in the center. The coil bracket 50 is fixed on the rotating shaft 11 through a plurality of locking nuts.

[0056] Among them, multiple groups of the coil bracket 50, the magnetic induction coil 51, the sliding pin 52, the sliding pin positioning hole 53, and the return spring 54 are provided and arranged at intervals along the circumferential direction of the rotating shaft 11.

[0057] The coil bracket 50 provided with the magnetic induction coil 51 and the sliding pin 52 are the main components of the electromagnetic clutch. That is, in this application, the electromagnetic clutch can be used to replace the centrifugal clutch structure in the second embodiment above. The electromagnetic clutch uses the electromagnetic force generated after the magnetic induction coil 51 is energized to draw out the sliding pin 52 from the sliding pin positioning hole 53 on the planetary bracket 141. When the magnetic induction coil 51 is powered off, the sliding pin 52 will slide into the sliding pin positioning hole 53 under the elastic force of the compression spring 54 to achieve the clutch function.

[0058] Specifically, the usage method of the electromagnetic clutch is as follows: when the hub motor is not started, the magnetic induction coil 51 is in the energized state, and the electromagnetic force generated by the magnetic induction coil 51 draws out the sliding pin 52 from the sliding pin positioning hole 53, so that the coil bracket 50 is separated from the planetary bracket 141. At this time, the electromagnetic clutch is in an unlinked state; when the hub motor is started, the magnetic induction coil 51 is in the powered-off state, the sliding pin 52 slides out of the magnetic induction coil 51 under the elastic force of the compression spring 54 and slides into the sliding pin positioning hole 53, and the coil bracket 50 is engaged with the planetary bracket 141. At this time, the electromagnetic clutch is in a fully linked state, and the outer gear ring 144 starts to rotate.

[0059] When the product of the present invention is specifically implemented:

[0060] Suppose the four wheels of the front and rear axles of the car are driven. Assume that the wheel diameter is 1000 millimeters, and each circle is 1000mm x 3.14 = 3.14 meters. It rotates 300 circles per minute and 18000 circles per hour. 18000 x 3.14 = 56.52 kilometers. The speed ratio of the reducer is 7. At this time, the rotational speed of the hub motor is 2100 revolutions.

[0061] If the wheel diameter is reduced to 500 mm and the vehicle speed remains unchanged, the rotational speed of the in-wheel motor is 4,200 revolutions, but if the reduction ratio is reduced to 5, the rotational speed of the in-wheel motor is 3,000 revolutions at this time.

[0062] The core of this vehicle is the adoption of the "integrated component of in-wheel motor planetary gear reduction". This component can be used in multi-axle vehicles to remove complex mechanical transmission devices and save space; when used in aircraft, since the drive part is greatly reduced, the taxiing distance during takeoff can be reduced. It can even be used on ships, and only by replacing the wheels with propellers can it be used on ships, with the same other principles.

[0063] The motors of traditional new energy vehicles are all started with load, while the product of the present invention is provided with a centrifugal clutch or an electromagnetic clutch. By adding a centrifugal clutch or an electromagnetic clutch between the motor and the load, the in-wheel motor can be started without load. When the rotational speed reaches the engagement of the centrifugal clutch or the electromagnetic clutch during starting, it drives the wheel with a load to rotate. The purpose is to save the starting current of the motor in normal operation.

[0064] Inspired by the ideal embodiments based on this application above, through the above description, relevant staff can completely make various changes and modifications without departing from the technical idea of this application. The technical scope of this application is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A solution for new energy vehicles, including a new energy vehicle, an electric drive device for driving four wheels on two axles and four wheels of the new energy vehicle, a vehicle main control panel, and a steering gear, characterized in that: The electric drive device comprises a wheel hub motor and a speed measuring coil, wherein the wheel hub motor comprises a rotating shaft, a stator, a rotor, two sets of planetary reduction structures, and a housing; the stator is fixedly arranged on the rotating shaft, and the rotor is rotatably installed outside the stator, and the rotor is driven to rotate by the electromagnetic force generated by the stator, and the rotor is rotatably arranged on the rotating shaft through a tapered roller shaft; The two groups of planetary reduction structures are symmetrically arranged on both sides of the rotor, and each group of planetary reduction structures includes a planetary bracket, a plurality of planetary gears, a sun gear, and an outer gear ring. The planetary bracket is fixed on the rotating shaft, and the axis of the planetary bracket coincides with the rotating shaft. The plurality of planetary gears rotate on the planetary bracket at intervals along the circumference of the rotating shaft. One end of the sun gear is fixedly connected to the rotor, and the other end is meshed with the planetary gear. The planetary gear is meshed with the outer gear ring, and the outer gear ring is fixed in the casing. The casing is installed on the rotating shaft through a tapered roller bearing. The outer side surfaces of the tapered roller bearings are sequentially provided with bearing pads and oil seals, and the bearing pads are fixed to the rotating shaft through fastening screws and nuts. The speed measuring coil is installed on the stator of the motor. When the magnetic field of the motor rotor sweeps across the speed measuring coil, a speed signal is generated and added to the main control board to control the rotation speed of the wheels. The differential signal is taken from the steering gear. When turning left or right, the two front wheels also swing left and right. This front wheel swing to the right is converted into a differential signal and added to the main control board. When turning, the main control board controls the wheels to rotate differentially.

2. A solution for new energy vehicles according to claim 1, characterized in that: It also includes a planetary wheel shaft, which is fixed to the planetary bracket through a plurality of locking nuts, and the opposite end of the planetary wheel shaft is rotatably mounted with a planetary wheel.

3. A solution for new energy vehicles according to claim 2, characterized in that: The planetary support is fixed on the rotating shaft through a locking nut. A plurality of locking nuts are provided and radially arranged between the planetary support and the rotating shaft.

4. A solution for new energy vehicles according to any one of claims 1 to 3, characterized in that: It also includes a sliding key, a keyway, a tension spring, a spring sleeve, and a connecting ring, wherein the connecting ring is sleeved between the casing and the rotor, and a gap is left between them, and support frames are provided at both ends of the connecting ring, and the support frames rotate on a rotating shaft between the planetary gear and the rotor, and the sun gear is installed on the side of the support frame close to the planetary gear; The spring sleeve is fixed on the rotor, one end of the tension spring is installed in the spring sleeve, and the other end is installed with a sliding key, the key slot is opened in the connecting ring, and the key slot corresponds to the position of the sliding key; Wherein, in the initial state, the sliding key portion is located in the spring sleeve.

5. A solution for new energy vehicles according to claim 4, characterized in that: The sliding keys, keyways, tension springs and spring sleeves are matched to form a plurality of groups and are arranged at intervals along the circumference of the rotating shaft.

6. A solution for new energy vehicles according to claim 5, characterized in that: The spring sleeve is fixed on the side surface of the rotor or the outer surface of the rotating shaft, and both ends of the sliding key are triangular prism-shaped and easy to insert into the keyway.

7. A solution for new energy vehicles according to any one of claims 1 to 3, characterized in that: It also includes a coil bracket, a magnetic induction coil, a sliding pin, a sliding pin positioning hole, and a reset spring. The pin positioning hole is provided on the planetary bracket, and the planetary bracket is mounted on the rotating shaft through a sliding bearing. The coil bracket is fixedly mounted on the rotating shaft, and the magnetic induction coil is mounted on the coil bracket. An installation groove for installing a reset spring is provided at one end of the magnetic induction coil close to the rotor, one end of the sliding pin is located in the installation groove and connected to the reset spring, and the other end can be inserted into the sliding pin positioning hole.

8. A solution for new energy vehicles according to claim 7, characterized in that: The coil support, magnetic induction coil, sliding pin, sliding pin positioning hole and reset spring are matched and arranged in multiple groups along the circumference of the rotating shaft.

9. A solution for new energy vehicles according to claim 8, characterized in that: The coil support is a disc support, the center of which is provided with a round hole connected with the rotating shaft, and the coil support is fixed on the rotating shaft through a plurality of locking nuts.

10. A solution for new energy vehicles according to claim 1, characterized in that: The planetary support is a disc support, and a circular hole connected to the rotating shaft is opened in the center.

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