CN211183671U

CN211183671U - In-wheel motor

Info

Publication number: CN211183671U
Application number: CN201921829042.0U
Authority: CN
Inventors: 赵明远; 陈鑫
Original assignee: Changzhou Annaiya Rehabilitation Equipment Co ltd
Current assignee: Changzhou Annaiya Rehabilitation Equipment Co ltd
Priority date: 2019-10-29
Filing date: 2019-10-29
Publication date: 2020-08-04
Anticipated expiration: 2029-10-29

Abstract

The utility model discloses an in-wheel motor, including fixed axle, stator, the rotor that has the cavity, the stator is fixed on the fixed axle, and the rotor rotationally sets up back on the fixed axle, and the rotor encircles around the stator, still includes: the sun gear comprises a body and a disc-shaped part arranged at one end of the body, and after the sun gear is sleeved on the fixed shaft in an empty mode, the disc-shaped part is fixedly connected with one end of the rotor; the planetary mechanism comprises a planet carrier and planet gears connected to the planet carrier, the planet carrier is matched with the fixed shaft, the planet gears are fixedly connected with the planet carrier, and the planet gears are meshed with the sun gear; a hub surrounding the rotor and the planetary mechanism, the hub being rotatably provided on the fixed shaft; and the inner-tooth gear ring is fixed on the inner circumferential surface of the hub, and the planet gears are meshed with the inner-tooth gear ring. The utility model discloses a wheel hub motor can make output torque obtain promoting.

Description

In-wheel motor

Technical Field

The utility model relates to an in-wheel motor.

Background

The motor is mainly used for generating driving torque and is used as a power source of electric appliances or various machines. For example:

the most important power in the electric vehicle comes from a hub motor, the existing hub motor is respectively composed of a stator and a rotor with a fixed shaft, the fixed shaft is fixedly connected with the electric vehicle through threads, and the rotor is an external hub. For the hub motor, when the motor works, the hub rotates, the fixed shaft is not fixed, and the maximum torque output by the hub motor is determined by the magnitude of the magnetic field force.

For the motor with the structure, the output torque is determined by the magnitude of the magnetic field force, and for the motor with the same magnetic field acting force, how to improve the output torque of the motor is the problem at present.

Disclosure of Invention

The utility model provides a can promote output torque's in-wheel motor.

The technical scheme for solving the technical problems is as follows:

the utility model provides an in-wheel motor, includes fixed axle, stator, the rotor that has the cavity, and the stator is fixed on the fixed axle, and the rotor rotationally sets up back on the fixed axle, and the rotor surrounds around the stator, and its characterized in that still includes:

the sun gear comprises a body and a disc-shaped part arranged at one end of the body, and after the sun gear is sleeved on the fixed shaft in an empty mode, the disc-shaped part is fixedly connected with one end of the rotor;

the planetary mechanism comprises a planet carrier and planet gears connected to the planet carrier, the planet carrier is matched with the fixed shaft, the planet gears are fixedly connected with the planet carrier, and the planet gears are meshed with the sun gear;

a hub surrounding the rotor and the planetary mechanism, the hub being rotatably provided on the fixed shaft;

and the inner-tooth gear ring is fixed on the inner circumferential surface of the hub, and the planet gears are meshed with the inner-tooth gear ring.

Further, the planet gear comprises a first gear and a second gear, the first gear and the second gear are connected to form a duplicate gear, the first gear is meshed with the sun gear, and the second gear is meshed with the internal gear ring.

The power cord connector further comprises a positioning tube, one end of the positioning tube is sleeved on the fixing shaft in a hollow mode, the other end of the positioning tube is fixed with the fixing shaft, and a wire groove used for leading out a power cord is formed in the inner side wall of the positioning tube.

Furthermore, an extension part with one end located in the cavity is arranged on the side wall of the rotor, a screw hole is formed in the extension part, a groove is formed between the other end of the extension part and one end of the rotor, and after the disc-shaped part is embedded into the groove, the disc-shaped part of the sun gear is fixed with the extension part through a screw.

When the rotor rotates, the sun gear rotates along with the rotor, the sun gear drives the planet gear to rotate, the planet gear drives the planet carrier to rotate, and the planet carrier drives the hub to rotate. The utility model discloses pass through sun tooth, planetary mechanism and ring gear transmission with the torque of rotor output, at this in-process, because the rotational speed of sun tooth, planet tooth and internal tooth ring gear is inequality to the rotational speed that makes wheel hub fixed with the internal tooth ring gear is inequality with the rotational speed of rotor, like this the utility model discloses after optimizing inside the motor, make wheel hub's torque obtain the promotion.

The utility model discloses especially under the condition that needs increase output torque, to the motor of the same volume, under the condition that does not change magnetic field force, can make output torque obtain the increase.

Drawings

Fig. 1 is a schematic sectional structure view of the hub motor of the present invention;

FIG. 2 is a schematic view of a sun gear;

FIG. 3 is a schematic structural diagram of a planet carrier;

reference numbers in the drawings:

1 is a fixed shaft, 2 is a stator, 3 is a rotor, 31 is an extension portion, 4 is a first bearing, 5 is a body, 6 is a disc-shaped member, 7 is a screw, 8 is a planet carrier, 81 is a support portion, 82 is a tapered mounting portion, 83 is a shaft, 9 is a planetary gear, 91 is a first gear, 92 is a second gear, 10 is a hub body, 11 is an end cap, 12 is a bearing, 13 is an internally toothed ring gear, and 14 is a positioning tube.

Detailed Description

As shown in fig. 1, the utility model discloses an in-wheel motor, including fixed axle 1, stator 2, rotor 3, sun tooth, planetary mechanism, the wheel hub that has the cavity, stator 2 fixes on fixed axle 1, and rotor 3 rotationally sets up back on fixed axle 1, and rotor 3 encircles around stator 2, and rotor 3 passes through first bearing 4 and fixed axle 1 swing joint.

As shown in fig. 1 and 2, the sun gear includes a body 5 and a disc member 6 disposed at one end of the body 5, the body 5 is a gear, the body 5 preferably adopts a cylindrical gear, and after the sun gear is freely sleeved on the fixed shaft 1, the disc member 6 is fixedly connected with one end of the rotor 3.

As shown in fig. 1, an extension portion 31 with one end located in the cavity is disposed on the side wall of the rotor 3, a screw hole is disposed on the extension portion 31, a groove is formed between the other end of the extension portion 31 and one end of the rotor, and after the disk-shaped member 6 is embedded in the groove, the disk-shaped member 6 of the sun gear is fixed with the extension portion 31 through a screw 7. The extension 31 is formed with a through hole in which the first bearing 4 is mounted. The other end of the rotor 3 is provided with a mounting hole in which the first bearing 4 is also mounted.

As shown in fig. 1 and 3, the planetary mechanism includes a carrier 8, and planet gears 9 connected to the carrier, the carrier 8 is engaged with the fixed shaft 1, the planet gears 9 are fixedly connected to the carrier 8, and the planet gears 9 are engaged with the sun gear. The carrier 8 includes three disc-shaped support portions 81 and three tapered mounting portions 82, the three tapered mounting portions 82 are uniformly distributed on the circumferential surface of the disc-shaped support portion 81, a shaft 83 is mounted on the end surface of the tapered mounting portions 82, the axial direction of the shaft 83 is parallel to the axial direction of the disc-shaped support portion 81, and the planetary gear 9 is connected to the shaft 83.

The hub surrounds the rotor 3 and the planetary mechanism, and the hub 3 is rotatably provided on the fixed shaft 1. The hub is composed of a hub body 10 and an end cover 11, two ends of the hub body 10 are fixedly connected with the end cover 11, and the end cover 11 is connected with the shaft 1 through a bearing 12.

The planetary gear set further comprises an internal gear ring 13, wherein the internal gear ring 13 is fixed on the inner circumferential surface of the hub, the internal gear ring 13 is preferentially arranged on the inner circumferential surface of the hub body 10, and the planetary gears 9 are meshed with the internal gear ring. The planetary gear 9 includes a first gear 91, a second gear 92, and the first gear 91 and the second gear 92 are connected to form a double gear, wherein the first gear 91 is engaged with the sun gear, and the second gear 92 is engaged with the internal gear ring 13.

After the first gear 91 is engaged with the sun gear, the power transmission function can be achieved, and after the second gear 92 is engaged with the internal gear ring 13, the advantages that the planetary mechanism works stably and the speed ratio is increased can be achieved. The planet gears 9 adopt a dual gear structure, which is beneficial to reducing the diameter of the hub body 10 while ensuring the transmission ratio of the first gear 91 and the sun gear, namely, after the outer diameter of the first gear 91 is determined, the inner gear ring 1 is installed without enlarging the inner space of the hub body 10 through the meshing action of the second gear 92 and the inner gear ring 13.

The power cord fixing device further comprises a positioning tube 14, one end of the positioning tube 14 is sleeved on the fixing shaft 1 in a hollow mode, the other end of the positioning tube 14 is fixed with the fixing shaft 1, and a wire guide groove used for leading out a power cord is formed in the inner side wall of the positioning tube 14. The power line is guided by the positioning tube 14, so that the power line is prevented from being rubbed by other parts during operation, and the stability of the motor workpiece is determined.

Claims

1. The utility model provides an in-wheel motor, includes fixed axle, stator, the rotor that has the cavity, and the stator is fixed on the fixed axle, and the rotor rotationally sets up back on the fixed axle, and the rotor surrounds around the stator, and its characterized in that still includes:

2. The in-wheel motor of claim 1, wherein the planet gears comprise a first gear and a second gear, the first gear and the second gear being coupled to form a dual gear, wherein the first gear is engaged with the sun gear and the second gear is engaged with the internally toothed ring gear.

3. The in-wheel motor of claim 1, further comprising a positioning tube, wherein one end of the positioning tube is sleeved on the fixing shaft, the other end of the positioning tube is fixed with the fixing shaft, and a wire guide groove for leading out a power wire is arranged on the inner side wall of the positioning tube.

4. The in-wheel motor according to claim 1, wherein the side wall of the rotor is provided with an extension part with one end located in the cavity, the extension part is provided with a screw hole, a groove is formed between the other end of the extension part and one end of the rotor, and after the disc-shaped part is embedded in the groove, the disc-shaped part of the sun gear is fixed with the extension part through a screw.