CN105774526A - Wheel hub motor device capable of outputting high torque and automobile - Google Patents

Abstract

The invention discloses a wheel hub motor device capable of outputting high torque. The wheel hub motor device comprises a wheel hub motor, a first planetary gear row, a second planetary gear row and a wheel rim, wherein the wheel hub motor is provided with a motor outer casing; the first planetary gear row comprises a first sun gear, a first planetary carrier and a first inner gear ring; the first gun gear fixedly sleeves a motor shaft of the wheel hub motor; the second planetary gear row comprises a second sun gear, a second planetary carrier and a second inner gear ring; the second sun gear is connected with the first planetary carrier, and rotates together with the first planetary carrier; the second sun gear is rotationally supported on the motor shaft of the wheel hub motor; the first inner gear ring is fixedly connected with the second planetary carrier, and the second inner gear ring is fixedly connected with the motor outer casing; the wheel rim is connected with the secondary planetary carrier, rotates together with the second planetary carrier, and is used for outputting rotation power. The invention also discloses an automobile. The wheel hub motor device has the advantages that the structure is simple, the implementing of technique is easy, and the integration with the whole automobile is convenient.

Description

A wheel hub motor device with high output torque and automobile

technical field

The invention relates to the structural field of hub motors, in particular to a hub motor device and an automobile that output large torque.

Background technique

Electric vehicles include hybrid vehicles, fuel cell vehicles, pure electric vehicles, etc., which have the characteristics of energy saving and environmental protection, and are the development direction of the new generation of automobile technology. The electric vehicles currently being developed are generally formed by modifying the power transmission system in the traditional automobile chassis. For example, a hybrid vehicle is driven by adding a drive motor to the drive train and realizing power synthesis with the help of a power synthesizer. The fuel cell vehicle uses the electric energy output by the fuel cell and the electric energy of the auxiliary energy to provide power for the drive motor to drive the vehicle. A pure electric vehicle uses a power battery to provide electric energy for the drive motor to drive the vehicle. Among all electric vehicle configuration schemes, the scheme of directly integrating the motor with the wheel, that is, the hub motor drive scheme or "electric wheel", is the most conducive to improving the performance of the vehicle. In-wheel motor drive technology is a key technology to improve the performance of electric vehicles. It brings great advantages to the vehicle and simplifies the structure of the vehicle. The driving force of each wheel can be independently controlled only by the drive motor instead of the traditional vehicle. Only by comprehensively controlling the power transmission system and braking system of the vehicle can the driving force control of the wheels be realized. The in-wheel motor drive technology can achieve better performance of the vehicle chassis control technology at a lower cost and realize some advanced technologies that cannot be realized by the traditional vehicle chassis. .

In-wheel motor drive technology has begun to enter the product application stage in the field of foreign civilian vehicles. Major foreign automobile companies have developed in-wheel motor-driven vehicles, and domestic in-wheel motor-driven electric vehicles are in the technical research stage. Hybrid electric vehicle technology driven by in-wheel motors has become an important development direction of the new generation of military vehicle power drive technology. The United States, Germany, France, Japan, etc. are all conducting research on military hybrid technology, and all have adopted the hub motor drive + hybrid scheme without exception. It can be seen that the use of in-wheel motor drive has become an important direction for the development of the next-generation electric vehicle drive system in the future. The in-wheel motor is the key assembly of this technology. Vehicles using this technology have the advantages of energy saving, efficient recovery of braking energy, and simplified vehicle structure.

However, the driving torque of the current in-wheel motors is insufficient, especially for large vehicles, which have a greater demand for the torque of the in-wheel motors, and the low torque of the existing in-wheel motors hinders the application of in-wheel motor drive technology. At present, the car hub motor drive generally adopts the direct drive scheme, which requires the motor to output a large current in order to output low speed and high torque, which makes the motor low in efficiency, low in heat dissipation, and technically difficult to realize. For the current in-wheel motor scheme that adopts deceleration drive, take ZF's wheel-side drive axle as an example, it has the problems of unreasonable structure, large space occupation and inability to be directly integrated with the wheel.

Contents of the invention

Based on the technical problems in the prior art, one of the objectives of the present invention is to provide a hub motor device capable of outputting high torque, which can realize low speed and high torque output of the hub motor, by using a double-stage planetary gear reducer The present invention can obtain a larger transmission ratio within a limited space size, and solve the problem of insufficient driving torque of the hub motor, especially the problem of small torque for the hub motor of a large automobile.

The second purpose of the present invention is to make full use of the space of the hub motor body through the integrated design of the double-stage planetary reducer and the hub motor, and to make the overall space size of the device change little by embedding the double-stage planetary reducer and the concave cavity of the motor casing , to solve the problems in the prior art that a high-power motor is used to obtain a larger motor torque or the size is too large to be directly integrated with the wheel after being integrated with a reducer.

The design of the invention can meet the performance requirements of the whole electric vehicle, especially provide a better solution for large vehicles using electric wheel drive, and has the advantages of simple structure, easy technical realization, and convenient integration with the whole vehicle.

The technical scheme provided by the invention is:

A hub motor device with high torque output, comprising:

an in-wheel motor having a motor housing;

a first planetary gear row including a first sun gear, a first planet carrier and a first ring gear;

The first sun gear is fixedly sheathed on the motor shaft of the in-wheel motor, and is used to receive the rotational power of the motor shaft;

a second planetary gear row including a second sun gear, a second planet carrier, and a second ring gear;

The second sun gear, which is connected to the first planet carrier, can rotate together with the first planet carrier; and the second sun gear is rotatably supported on the motor shaft of the hub motor, and can be relatively rotates on the motor shaft;

The first ring gear is fixedly connected to the second planet carrier, and the second ring gear is fixedly connected to the motor housing; the motor housing is rotatably supported on the motor shaft;

The rim, which is connected with the second planet carrier, can rotate with the second planet carrier, and is used for outputting rotational power.

Preferably, it also includes: a rotor bracket, a permanent magnet and a rotor core;

Wherein, the rotor bracket is fixed on the motor shaft, the permanent magnet is fixed on the rotor bracket, and the rotor core is fixed on the motor casing.

Preferably, it further includes: a brake disc fixedly connected to the motor shaft of the in-wheel motor.

Preferably, both sides of the motor housing are inwardly recessed to form a first cavity and a second cavity, the second planetary gear row is fixed in the first cavity, and the brake disc is arranged in the first cavity. In the second cavity at the other end of the motor housing; the brake caliper is fixed on the motor housing.

Preferably, the first planetary gear row further includes: at least one first planetary gear and a first planetary gear shaft;

Wherein, the motor shaft is connected to the first sun gear through a spline, the first planetary gear is supported on the first planetary gear shaft through a bearing, and the first planetary gear shaft is connected to the first planetary carrier through a The snap ring is connected, and the first inner ring gear is fixedly connected to the second planet carrier by bolts.

Preferably, the second planetary gear row further includes: at least one second planetary gear and a second planetary gear shaft;

Wherein, the second planet carrier and the second planet wheel shaft are locked by a snap ring.

Preferably, a reducer end cover is provided on the outside of the first planetary gear row, a right end cover is provided on the side of the motor housing facing the brake disc, the motor shaft passes through the motor housing, and one end is rotatable supported on the reducer end cover outside the first planetary gear row, and the other end is rotatably supported on the right end cover of the motor housing; and

The motor shaft and the end cover are rotatably supported by tapered roller bearings.

Preferably, the motor housing is provided with a left end cover facing the second planetary gear row, which is detachably connected to the second ring gear, and the left end cover is supported on the second ring gear by a tapered roller bearing. on the planet carrier.

Preferably, there are three planetary wheels, which are evenly distributed on the planetary carrier.

An automobile is driven by the hub motor device.

Compared with the prior art, the present invention has the beneficial effects:

1. The wheel hub motor with double-stage reducer described in the present invention realizes the drive technology of the wheel hub motor of electric vehicles through the integration of the wheel hub motor and the double-stage reducer, and solves the insufficient drive torque of the wheel hub motor, especially for large vehicles. The problem of small hub motor torque;

2. The wheel hub motor capable of outputting large torque according to the present invention makes full use of the space of the hub motor body through the integrated design of the double-stage reducer and the wheel hub motor, so that after the integration of the double-stage reducer, the space size of the whole machine does not change much. Can be integrated directly with the wheel. The whole vehicle structure of the electric vehicle equipped with the wheel hub motor is greatly simplified, and no complicated transmission system is needed. At the same time, the brake arranged at the rear end of the motor can reduce the size of the brake and place it in the concave cavity at the rear end of the motor due to the torque-increasing effect of the double-stage reducer. In addition, the torque of the brake can be reduced because the braking torque can be fed back from the motor for braking. load. Therefore, a small brake can be used, which reduces the space occupied by the brake.

Description of drawings

Fig. 1 is the front view of the inner structure of the hub motor with double-stage reducer of the present invention;

Fig. 2 is the front view of the internal structure of the motor of the hub motor with double-stage reducer according to the present invention;

Fig. 3 is the front view of the double-stage reducer structure of the hub motor with double-stage reducer according to the present invention;

Fig. 4a is the front view of the motor shaft structure of the hub motor with double-stage reducer according to the present invention;

Fig. 4b is a left view of the motor shaft structure of the hub motor with a double-stage reducer according to the present invention;

Fig. 4c is a sectional view at A-A place among Fig. 4b;

Fig. 5a is the front view of the second sun gear structure of the hub motor with double-stage reducer according to the present invention;

Fig. 5b is the sectional view of A-A place in Fig. 5a;

Fig. 6a is a front view of the second planet carrier structure of the hub motor with a double-stage reducer according to the present invention;

Fig. 6b is the rotation sectional view of A-A place in Fig. 6a;

Fig. 7a is a front view of the motor right end cover structure of the hub motor with a double-stage reducer according to the present invention;

Figure 7b is a cross-sectional view at A-A in Figure 7a;

Fig. 8a is a front view of the motor left end cover structure of the hub motor with a double-stage reducer according to the present invention;

Figure 8b is a cross-sectional view at A-A in Figure 8a;

Fig. 9a is a front view of the planetary shaft snap ring of the hub motor with a double-stage reducer according to the present invention;

Fig. 9b is a left side view of the planetary shaft snap ring of the hub motor with double-stage reducer according to the present invention.

In the figure: 1. Motor housing, 2. Motor housing connecting bolts, 3. Motor housing right end cover, 4. Rotor core, 5. Permanent magnet, 6. Rotor bracket, 7. Brake caliper connecting bolts, 8. Gasket , 9. Brake caliper, 10. Right side bearing retaining ring felt ring, 11. Brake disc connection flat key, 12. Motor shaft, 13. Brake disc fixing nut, 14. Brake disc fixing nut washer, 15 .Brake disc, 16. Right bearing retaining ring, 17. Right bearing retaining ring connecting screw, 18. Right tapered roller bearing fixing nut, 19. Right tapered roller bearing, 20. Motor shaft and rotor bracket Connecting screw, 21. Felt ring of the small end cover on the left side of the motor, 22. Wheel rim, 23. Small end cover on the left side of the motor, 24. The second planetary carrier on the right side, 25. The second sun gear, 26. The left end cover of the motor shell and the Motor housing connecting bolts, 27. Motor housing and second ring gear connecting bolts, 28. Second planet carrier, 29. First planet carrier, 30. First planet carrier and second sun gear connecting screws, 31. Bolts connecting the first inner ring gear and the second planet carrier, 32. Left end cover of the first reducer, 33. Left tapered roller bearing, 34. Screws connecting the left bearing end cover, 35. Left tapered roller Bearing fixing nut, 36. left bearing end cover, 37. left tapered roller bearing positioning sleeve, 38. first sun gear, 39. first planetary gear, 40. first planetary gear shaft, 41. first planet Shaft snap ring screw, 42. The first planetary wheel shaft snap ring, 43. The first planetary wheel bearing, 44. The first planetary wheel bearing positioning sleeve, 45. The first inner ring gear, 46. Rim end cover, 47. Wheel rim Connecting nut, 48. Wheel rim, rim end cover and second planet carrier connecting bolt, 49. Second planetary wheel shaft, 50. Motor support tapered roller bearing, 51. Left end cover of motor housing, 52. Second planetary wheel bearing, 53 .The second planetary wheel bearing positioning sleeve, 54. The second planetary wheel, 55. The second internal ring gear, 56. The second planetary wheel shaft snap ring, 57. The second planetary wheel shaft snap ring screw.

detailed description

The present invention will be further described in detail below in conjunction with the accompanying drawings, so that those skilled in the art can implement it with reference to the description.

As shown in Figure 1, in order to realize the above functions, the present invention provides a hub motor device that outputs high torque. The structure of the hub motor that can output low speed and high torque in the present invention adopts an inner rotor structure, and The double-stage planetary gear reducer is integrated by using the embedded space of the motor rotor to achieve a large speed ratio deceleration and torque increase in a limited space. The speed ratio can be adjusted between 7-23 to meet the torque requirements of various vehicles. , the main body of the motor includes a motor casing, a permanent magnet, a rotating shaft and a rotor assembly. The front and rear of the motor casing are recessed inwardly and embedded in the internal gap of the rotor. device sun wheel.

The planetary gear reduction mechanism is composed of two-stage planetary rows; wherein, the first planetary gear row of the present invention consists of a first sun gear, three first planetary gears, a first planetary gear shaft, a first ring gear and The first planet carrier is composed. The sun gear of the first planetary gear row is connected to the motor shaft through a spline, the planet gear and the planet carrier are connected through the first planet gear shaft, and the first planet carrier and the second sun gear are fixed to rotate together by bolts; the invention described The second planetary gear row is composed of a second sun gear, three second planetary gears, a second planetary gear shaft, a second ring gear and a second planetary carrier. The sun gear of the second planetary gear row is sleeved on the motor shaft, and the second planet carrier and the first ring gear are fixed together by bolts, and at the same time, it protrudes from the outer edge of the flange and is fixedly connected with the wheel rim by tire bolts . The second inner ring gear is fixedly connected with the motor casing through bolts, and is a fixed part; the entire second planetary gear row is embedded in the cavity at the front end of the motor casing, and the brake disc is arranged in the cavity at the rear end of the motor. The brake disc is fixedly connected to the motor shaft, and the brake caliper is fixed on the motor housing. The structure of the brake disc and caliper is the same as that of the traditional automobile brake.

Further description, as shown in Figure 1, the in-wheel motor has a motor housing 1, and the first planetary gear row includes a first sun gear 38, a first planet carrier 29 and a first ring gear 45, wherein the first sun gear 38 is connected to The motor shaft 12 of the hub motor is used to receive the rotational power of the motor shaft 12. The second planetary gear row includes a second sun gear 25, a second planet carrier 28 and a second ring gear 55, wherein the second sun gear 25 is connected to The first planet carrier 29 can rotate together with the first planet carrier 29, and the second sun gear 25 is rotatably supported on the motor shaft 12 of the hub motor, and can rotate relative to the motor shaft 12. The first ring gear 45 and The second planet carrier 28 is fixedly connected, the second ring gear 55 is fixedly connected with the motor casing 1, the motor casing 1 is rotatably supported on the motor shaft 12, the rim 22 is connected with the second planet carrier 28, and can follow the second planetary The frame 28 rotates for outputting the power to finally drive the vehicle.

In another embodiment, the in-wheel motor structure also includes: a rotor bracket 6, a permanent magnet 5 and a rotor core 4, wherein the rotor bracket 6 is fixed on the motor shaft 12 of the in-wheel motor, and the permanent magnet 5 is embedded in the rotor bracket 4, the rotor core 4 is fixed on the motor housing 1.

In another embodiment, the hub motor structure further includes a brake disc 15, and the brake disc 15 is fixedly connected to the motor shaft 12 of the hub motor.

In another embodiment, both ends of the motor housing 1 are inwardly recessed to form a first cavity and a second cavity, the second planetary gear row is embedded in the first cavity at one end of the motor housing 1, and the brake disc 15 It is arranged in the second cavity at the other end of the motor housing 1 and fixed on the motor housing 1 through the brake caliper 9 .

In another embodiment, the first planetary gear row further includes: at least one first planetary gear 39 and a first planetary gear shaft 40, wherein the motor shaft 12 of the in-wheel motor is connected to the first sun gear 38 through a spline, the second A planetary wheel 39 is supported on the first planetary wheel shaft 40 through bearings, the first planetary wheel shaft 40 and the first planetary carrier 29 are connected by the first planetary wheel shaft snap ring 42, the first ring gear 45 and the second planetary carrier 28 are connected by bolts Fixed connection.

In another embodiment, the second planetary gear row further includes: at least one second planetary gear 54 and a second planetary gear shaft 49;

Wherein, the second planetary carrier 28 and the second planetary shaft 49 are locked by the second planetary shaft snap ring 56 .

In another embodiment, the first reducer left end cover 32 is arranged on the outer side of the first planetary gear row, and the motor casing is provided with the right end cover 3 of the motor casing facing the brake disc, and the motor shaft 12 of the hub motor passes through Motor housing 1, one end is rotatably supported on the first reducer left end cover 32 outside the first planetary gear row, the other end is rotatably supported on the motor housing right end cover 3; and the motor shaft 12 is connected to the first reducer left end Both the cover 32 and the right end cover 3 of the motor housing are rotatably supported by tapered roller bearings.

In another embodiment, the motor housing 1 is provided with a motor housing left end cover 51 facing the second planetary gear row, which is connected with the second ring gear 55 by bolts, and the motor housing left end cover 51 is supported on the on the second planet carrier 28 .

In another embodiment, there are three first planetary gears 39 and three second planetary gears 54, which are evenly distributed on the planet carrier.

The present invention also provides an automobile, which is driven by using the in-wheel motor device described in the present invention.

Example

The present invention will be described in further detail below in conjunction with accompanying drawings 1 to 9, so that those skilled in the art can implement it with reference to the description.

As shown in accompanying drawing 1, the in-wheel motor assembly structure of the integrated double-stage reducer of the present invention is shown, and Fig. 9a and Fig. 9b show the structure of the planetary shaft snap ring of the present invention, the motor shaft 12 and the first sun gear 38 Through the spline connection, the first planetary wheel 39 is supported on the first planetary wheel shaft 40 through the first planetary wheel bearing 43, and the first planetary wheel bearing 43 is positioned by the first planetary wheel bearing positioning sleeve 44, and the first planetary wheel shaft 40 The first planetary shaft snap ring 42 is connected to the first planetary carrier 29 , and the first planetary shaft snap ring 42 is connected to the first planetary carrier 29 by a first planetary shaft snap ring screw 41 . The first planet carrier 29 is connected to the second sun gear 25 through the first planet carrier and the second sun gear connecting screw 30, and the second planet gear 54 is supported on the second planet gear shaft 49 through the second planet gear bearing 52. The wheel bearing 52 is positioned by the second planet wheel bearing positioning sleeve 53 . The second right planetary carrier 24 and the second planetary shaft 49 are locked by the second planetary shaft snap ring 56 , and the second planetary shaft snap ring 56 is connected with the second right planetary carrier 24 by the second planetary shaft snap ring screw 57 . The second planetary carrier 28 is rigidly connected to the rim 22 through the rim, the rim end cap, the second planetary carrier connecting bolt 48 and the rim connecting nut 47, and the second inner ring gear 55 is connected to the second inner ring gear through the motor housing. 27 is connected with the left end cover 51 of the motor housing, the left end of the motor shaft 12 is supported on the left end cover 32 of the first reducer through the left tapered roller bearing 33, and the motor shaft 12 is connected with the left tapered roller bearing fixing nut 35 through threads And fix the left side tapered roller bearing 33 left ends with glue anti-loosening, and the bearing right end carries out axial positioning by the left side tapered roller bearing positioning sleeve 37. The leftmost left end cover 36 of the motor shaft 12 is connected with the left end cover 32 of the first reducer through the left end cover connecting screw 34 for sealing, and the rim end cover 46 seals and protects the entire reducer. The right end of the motor shaft 12 is supported on the right end cover 3 of the motor housing by the right tapered roller bearing 19, and is threadedly connected with the right tapered roller bearing fixing nut 18 to fix the right tapered roller bearing 19 right end. The left end cover 51 of the motor housing is supported on the second planet carrier 28 through the motor supporting tapered roller bearing 50, and the felt ring 10 of the right bearing retaining ring and the felt ring 21 of the left small end cover of the motor seal the motor. The brake caliper 9 is fixed on the right end cover 3 of the motor housing through the gasket 8 and the brake caliper connecting bolt 7 . The brake disc 15 is fixed on the motor shaft 12 through the brake disc fixing nut washer 14 and the brake disc fixing nut 13 .

Shown in accompanying drawing 2 is the wheel hub motor structure of the present invention, the left end cover 51 of the motor housing is connected with the motor housing 1 through the left end cover of the motor housing and the connecting bolt 26 of the motor housing, and is connected with the second motor housing through the motor housing simultaneously. The ring gear connecting bolt 27 is connected with the second ring gear 55 and the small end cover 23 on the left side of the motor. The right end cover 3 of the motor housing is connected with the motor housing 1 through the motor housing connecting bolts 2 . The permanent magnet 5 is embedded on the rotor bracket 6 , and the rotor core 4 is attached to the motor casing 1 . The rotor assembly is fixed on the motor shaft 12 through the connecting screw 20 between the motor shaft and the rotor bracket. The right bearing retaining ring 16 is set on the front end of the motor shaft 12 and connected to the right end cover 3 of the motor housing through the right bearing retaining ring connecting screw 17, and the right tapered roller bearing fixing nut 18 and the motor shaft 12 are fixed by threaded connection Right side tapered roller bearing 19 right ends.

As shown in accompanying drawing 3, it is the structure of the double-stage reducer of the present invention, the motor shaft 12 is connected with the first sun gear 38 through a spline, and the second sun gear 25 is sleeved on the motor shaft 12 and passed through the first planet carrier 29 through the second sun gear. A planet carrier is connected with the second sun gear connecting screw 30 , and the left end cover 32 of the first reducer is connected with the first ring gear 45 and the second planet carrier 28 through the connecting bolt 31 between the first ring gear and the second planet carrier.

Figures 4a to 4c show the structure of the motor shaft 12, the left thread a matches the thread on the left tapered roller bearing fixing nut 35, the spline b cooperates with the spline groove on the first sun gear 38, and the intermediate shaft The blind hole f on the shoulder cooperates with the threaded hole on the rotor assembly, the keyway e on the right end and the keyway on the brake disc 15 are connected by interference fit through the brake disc connection flat key 11, and the thread c is fixed to the right tapered roller bearing The threads on the nut 18 cooperate, and the rightmost thread d cooperates with the brake disc fixing nut 13.

Shown in accompanying drawings 5a and 5b is the structure of the second sun gear 25, which is sleeved on the motor shaft 12, and the through hole at the left end matches the threaded hole on the first planet carrier 29.

As shown in accompanying drawings 6a and 6b, the structure of the second planet carrier 28, the bolt hole a on the right is matched with the through hole on the outer edge of the first ring gear 45 and the through hole on the left end cover 32 of the first reducer. The through hole b is the shaft hole of the second planet wheel shaft 49 , and the through hole d is matched with the through hole on the rim 22 . The step c cooperates with the inner edge of the motor supporting tapered roller bearing 50 , and the motor supporting tapered roller bearing 50 is used to support the motor casing 1 .

As shown in Figure 7 and Figure 7b, the structure of the motor right end cover 3, the bolt holes c around it are matched with the holes on the motor housing 1. The screw hole a on the flange of the large hole in the middle cooperates with the hole on the right end bearing retaining ring 16, and the boss b is used for positioning the right tapered roller bearing 19.

As shown in Figure 8a and Figure 8b, the structure of the left end cover 51 of the motor casing is shown. The through hole a on the outer edge matches the bolt hole on the motor casing 1, and the bolt hole b on the inner edge matches the through hole on the second inner ring gear 55. And the threaded hole on the small end cover 23 on the left side of the motor, the boss c of the large hole in the middle is used for the positioning of the middle tapered roller bearing.

Specific working methods

Below in conjunction with Fig. 1, the working mode of the present invention is described in detail:

Referring to FIG. 1 , the structure of the hub motor with a double-stage reducer described in the invention is a wheel-type structural component as a whole, and the double-stage reducer and the hub motor are mainly integrated in the inner cavity of the rim 22 . The motor housing 1 is fixed to the suspension. When the motor shaft 12 rotates, the spline drives the first sun gear 38 connected to it to rotate. Since the first inner ring gear 45 is fixedly connected with the rim 22, the first planetary gear 39 passes through the first sun gear 38. A planet wheel shaft 40 drives the first planet carrier 29 to rotate, and the first planet carrier 29 drives the second sun gear 25 that is sleeved on the motor shaft 12 through the first planet carrier and the second sun gear connecting screw 30 to rotate. The second inner ring gear 55 and the motor casing 1 are fixed and do not rotate, so the second planetary gear 54 drives the second planetary carrier 28 to rotate through the second planetary wheel shaft 49, and the second planetary carrier 28 and the rim 22 pass through the rim, the rim end cover and the second The connecting bolts 48 of the planet carrier are connected together, thereby driving the wheel rim 22 to rotate, and finally driving the vehicle to run.

During braking, the motor shaft 12 is decelerated by the brake disc 15 at the right end of the braking motor shaft 12, and finally the vehicle is braked.

Although the embodiment of the present invention has been disclosed as above, it is not limited to the use listed in the specification and implementation, it can be applied to various fields suitable for the present invention, and it can be easily understood by those skilled in the art Therefore, the invention is not limited to the specific details and examples shown and described herein without departing from the general concept defined by the claims and their equivalents.

Claims (10)

1. A wheel hub motor device with high torque output, characterized in that it comprises: an in-wheel motor having a motor housing; a first planetary gear row including a first sun gear, a first planet carrier and a first ring gear; The first sun gear is fixedly sheathed on the motor shaft of the in-wheel motor, and is used to receive the rotational power of the motor shaft; a second planetary gear row including a second sun gear, a second planet carrier, and a second ring gear; The second sun gear, which is connected to the first planet carrier, can rotate together with the first planet carrier; and the second sun gear is rotatably supported on the motor shaft of the hub motor, and can be relatively rotates on the motor shaft; The first ring gear is fixedly connected to the second planet carrier, and the second ring gear is fixedly connected to the motor housing; the motor housing is rotatably supported on the motor shaft; The rim, which is connected with the second planet carrier, can rotate with the second planet carrier, and is used for outputting rotational power. 2. The in-wheel motor device outputting high torque according to claim 1, further comprising: a rotor bracket, a permanent magnet and a rotor core; Wherein, the rotor bracket is fixed on the motor shaft, the permanent magnet is fixed on the rotor bracket, and the rotor core is fixed on the motor casing. 3 . The in-wheel motor device outputting high torque according to claim 2 , further comprising: a brake disc fixedly connected to the motor shaft of the in-wheel motor. 4 . 4. The in-wheel motor device with high output torque according to claim 3, characterized in that, both sides of the motor casing are inwardly recessed to form a first cavity and a second cavity, and the second planetary gear row fixed in the first cavity, the brake disc is arranged in the second cavity at the other end of the motor casing; the brake caliper is fixed on the motor casing. 5. The in-wheel motor device outputting high torque according to any one of claims 1-4, characterized in that, the first planetary gear row further comprises: at least one first planetary gear and a first planetary gear shaft; Wherein, the motor shaft is connected to the first sun gear through a spline, the first planetary gear is supported on the first planetary gear shaft through a bearing, and the first planetary gear shaft is connected to the first planetary carrier through a The snap ring is connected, and the first ring gear is fixedly connected to the second planet carrier by bolts. 6. The in-wheel motor device outputting high torque according to claim 5, characterized in that, the second planetary gear row further comprises: at least one second planetary gear and a second planetary gear shaft; Wherein, the second planet carrier and the second planet wheel shaft are locked by a snap ring. 7. The in-wheel motor device with high output torque according to claim 3, characterized in that, a reducer end cover is arranged on the outer side of the first planetary gear row, and the motor casing is arranged toward the side of the brake disc There is a right end cover, the motor shaft passes through the motor casing, one end is rotatably supported on the reducer end cover outside the first planetary gear row, and the other end is rotatably supported on the right end cover of the motor casing on; and The motor shaft and the end cover are rotatably supported by tapered roller bearings. 8. The in-wheel motor device with high output torque according to claim 7, characterized in that, the motor housing is provided with a left end cover facing the second planetary gear row, which is detachable from the second ring gear connected, and the left end cover is supported on the second planet carrier through tapered roller bearings. 9 . The in-wheel motor device with high output torque according to claim 1 , characterized in that there are three planetary wheels, which are evenly distributed on the planetary carrier. 10 . 10. An automobile, characterized in that it is driven by the in-wheel motor device as claimed in claims 1-9.