CN221669682U - Self-driven hub - Google Patents

Abstract

The utility model provides a self-driven wheel hub, which relates to the field of wheel hubs, and includes a circular power frame, a built-in motor, a planetary gear mechanism, a support shaft and an output shaft, wherein the shell of the built-in motor is fixedly connected to the output shaft, the shell of the built-in motor serves as a stator, and the central transmission shaft of the built-in motor drives the planetary gear mechanism. At this time, the central transmission shaft of the built-in motor is driven by the rotor, and the planetary gear mechanism drives the power frame to rotate, and then through optimized design, the output torque of the built-in motor is effectively increased, thereby greatly enhancing the control performance of the wheel hub; the built-in motor can adopt mature motor equipment on the market, without the need for special customization, is easy to obtain and has low cost, and has a large market value.

Description

Self-driving wheel hub

Technical Field

The utility model relates to the field of wheel hubs, in particular to a self-driving wheel hub.

Background Art

The wheel hub motor technology is also known as the in-wheel motor technology. Its biggest feature is that the power unit, transmission unit and brake unit are all integrated into the wheel hub, which greatly simplifies the mechanical part of the electric vehicle. Since the wheel hub motor has the characteristic of independent driving of a single wheel, it can be easily realized whether it is front-wheel drive, rear-wheel drive or four-wheel drive. Full-time four-wheel drive is very easy to implement on vehicles driven by wheel hub motors. At the same time, the wheel hub motor can achieve differential steering similar to tracked vehicles through different speeds of the left and right wheels or even reverse rotation, greatly reducing the turning radius of the vehicle. In special circumstances, it can almost achieve in-situ steering, which is very valuable for special vehicles.

Currently, the hub motor adopts a customized motor structure, but due to the limitation of its structure, the rotation speed of its rotor is the same as the rotation speed of the wheel hub itself, resulting in limited output torque of the existing hub motor. When the output torque increases, the power of the hub motor increases significantly and the control performance is poor.

Utility Model Content

The technical problem to be solved by the utility model is to overcome the deficiencies in the prior art and provide a self-driving wheel hub. The utility model effectively increases the output torque of the built-in motor through optimized design, thereby greatly enhancing the control performance of the wheel hub.

The utility model is realized through the following technical solutions:

A self-driving wheel hub comprises a circular power frame, a built-in motor, a planetary gear mechanism, a support shaft and an output shaft. The built-in motor and the planetary gear mechanism are arranged in the power frame, the support shaft and the output shaft are arranged on both sides of the power frame, and the support shaft and the output shaft are rotatably connected to the power frame through bearings. The housing of the built-in motor is fixedly connected to the output shaft, the central transmission shaft of the built-in motor drives the planetary gear mechanism, and the planetary gear mechanism drives the power frame to rotate.

It can be seen that in the above technical solution, the built-in motor can adopt mature motor equipment on the market, without special customization, easy to obtain and low cost. The shell of the built-in motor is fixedly connected to the output shaft, so the shell of the built-in motor serves as the stator, and the central drive shaft of the built-in motor drives the planetary gear mechanism. At this time, the central drive shaft of the built-in motor is driven by the rotor, and the planetary gear mechanism drives the power frame to rotate, and then through optimized design, the output torque of the built-in motor is effectively increased, greatly enhancing the control performance of the wheel hub.

According to the above technical solution, preferably, the planetary gear mechanism includes a central sun gear, a planetary gear set, a ring gear and a planetary gear carrier. The built-in motor drives the central sun gear to rotate through the central transmission shaft. The ring gear is fixed relative to the housing of the built-in motor. The planetary gear set meshes with the central sun gear and the ring gear for transmission. The planetary gear set drives the planetary gear carrier to rotate, and the planetary gear carrier drives the power frame to rotate.

It can be seen that in the above technical solution, the planetary gear set is meshed with the center sun gear and the ring gear for transmission. The center sun gear rotates under the drive of the central transmission shaft, and the ring gear is fixed relative to the housing of the built-in motor. At this time, the planetary gear set can drive the planetary gear carrier to rotate, and the planetary gear carrier can drive the power frame to rotate around the central axis.

According to the above technical solution, preferably, the center sun gear is coaxially fixedly connected to the center transmission shaft of the built-in motor, an inner gear ring is provided on the inner side of the ring gear for meshing and transmission with the planetary gear set, the planetary gear carrier supports the planetary gear set, the ring gear is fixedly connected to the housing of the built-in motor through a connecting part, the connecting part is rotatably connected to the power frame through a bearing, and the planetary gear carrier is fixedly connected to the power frame.

According to the above technical solution, preferably, the planetary gear set includes three groups of planetary gear units arranged at equal angles around the central sun gear, the planetary gear units are meshed with the central sun gear and the ring gear for transmission, the planetary gear carrier is coaxially fixedly connected to the power frame, and the planetary gear carrier is provided with three groups of connecting shafts coaxially rotatably connected to the planetary gear units.

It can be seen that in the above technical solution, since the ring gear is fixedly connected to the housing of the built-in motor through the connecting part, and the planetary gear unit is meshed with the center sun gear and the ring gear for transmission, the planetary gear unit can drive the planetary gear carrier to rotate around its central axis, and the planetary gear carrier is coaxially fixedly connected to the power frame, so the power frame can rotate synchronously.

According to the above technical solution, preferably, a hollow cavity is provided in the middle of the power frame, and the built-in motor and the planetary gear mechanism are both arranged in the hollow cavity.

It can be seen that in the above technical solution, the sealed hollow cavity can effectively prevent dust and other debris from interfering with the operation of the planetary gear mechanism, thereby extending the service life of the wheel hub.

According to the above technical solution, preferably, a track drive frame body adapted to the power track is fixedly provided on the outer circumference of the power frame.

According to the above technical solution, preferably, the built-in motor is a servo motor.

The beneficial effects of the utility model are:

(1) The housing of the built-in motor is fixedly connected to the output shaft. The housing of the built-in motor serves as a stator, and the central transmission shaft of the built-in motor drives the planetary gear mechanism. At this time, the central transmission shaft of the built-in motor is driven by the rotor, and the planetary gear mechanism drives the power frame to rotate. Then, through the optimized design, the output torque of the built-in motor is effectively increased, greatly enhancing the control performance of the wheel hub;

(2) The built-in motor can use mature motor equipment on the market, without the need for special customization, and is easy to obtain and low in cost.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 shows an isometric structural schematic diagram of an embodiment of the utility model;

FIG2 shows a schematic diagram of the main structure according to an embodiment of the utility model;

Fig. 3 shows a schematic cross-sectional view of the structure along the A-A direction in Fig. 2;

Fig. 4 shows a schematic cross-sectional view of the structure along the B-B direction in Fig. 2;

FIG5 shows a schematic diagram of an explosion structure according to an embodiment of the utility model;

Description of reference numerals:

1. Power frame; 2. Built-in motor; 3. Planetary gear mechanism; 4. Support shaft; 5. Output shaft; 6. Bearing; 7. Housing; 8. Center transmission shaft; 9. Center sun gear; 10. Planetary gear set; 11. Ring gear; 12. Planetary gear carrier; 13. Connecting part; 14. Planetary gear unit; 15. Connecting shaft; 16. Hollow cavity; 17. Track drive frame.

DETAILED DESCRIPTION

In order to enable those skilled in the art to better understand the technical solution of the utility model, the utility model is further described in detail below in conjunction with the accompanying drawings and the best embodiment. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the utility model.

In the description of the utility model, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the utility model.

As shown in the figure, this embodiment provides a self-driving wheel hub, including a circular power frame 1, a built-in motor 2, a planetary gear mechanism 3, a support shaft 4 and an output shaft 5, wherein the built-in motor 2 and the planetary gear mechanism 3 are arranged in the power frame 1, the support shaft 4 and the output shaft 5 are arranged on both sides of the power frame 1, and the support shaft 4 and the output shaft 5 are both rotatably connected to the power frame 1 through bearings 6, and the housing 7 of the built-in motor 2 is fixedly connected to the output shaft 5, the central transmission shaft 8 of the built-in motor 2 drives the planetary gear mechanism 3, the planetary gear mechanism 3 drives the power frame 1 to rotate, and the planetary gear mechanism 3 includes a central sun gear 9, a planetary gear set 10, a ring gear 11 and a planetary gear carrier 12, wherein the central sun gear 9 is coaxially and fixedly connected to the central transmission shaft 8 of the built-in motor 2, and the built-in motor 2 drives the central transmission shaft 8 through the central transmission shaft 8 The central sun gear 9 rotates, and the ring gear 11 is fixed relative to the housing 7 of the built-in motor 2. The ring gear 11 is fixedly connected to the housing 7 of the built-in motor 2 through a connecting part 13, and the connecting part 13 is rotationally connected to the power frame 1 through a bearing 6. In addition, the planetary gear set 10 includes three groups of planetary gear units 14 arranged at equal angles around the central sun gear 9. The inner side of the ring gear 11 is provided with an internal gear ring that meshes with the planetary gear unit 14 for transmission. The planetary gear unit 14 meshes with the central sun gear 9 and the ring gear 11 for transmission. The planetary gear carrier 12 is provided with three groups of connecting shafts 15 that are coaxially rotatably connected to the planetary gear unit 14. The planetary gear carrier 12 supports the planetary gear unit 14, and the planetary gear unit 14 drives the planetary gear carrier 12 to rotate. The planetary gear carrier 12 is coaxially and fixedly connected to the power frame 1, and the planetary gear carrier 12 drives the power frame 1 to rotate.

The above-mentioned built-in motor 2 can adopt mature motor equipment on the market, without special customization, easy to obtain and low cost. The shell 7 of the built-in motor 2 is fixedly connected to the output shaft 5, so the shell 7 of the built-in motor 2 serves as a stator, and the central transmission shaft 8 of the built-in motor 2 drives the planetary gear mechanism 3. At this time, the central transmission shaft 8 of the built-in motor 2 is driven by the rotor, and the planetary gear mechanism 3 drives the power frame 1 to rotate, and then through the optimized design, the output torque of the built-in motor 2 is effectively increased, greatly enhancing the control performance of the wheel hub; the planetary gear set 10 is meshed with the center sun gear 9 and the ring gear 11 for transmission. The center sun gear 9 rotates under the drive of the center transmission shaft 8, and the ring gear 11 is fixed relative to the shell 7 of the built-in motor 2. At this time, the planetary gear set 10 can drive the planetary gear frame 12 to rotate, and the planetary gear frame 12 can drive the power frame 1 to rotate around the center axis.

Furthermore, a hollow cavity 16 is provided in the middle of the power frame 1, and the built-in motor 2 and the planetary gear mechanism 3 are arranged in the hollow cavity 16. The closed hollow cavity 16 can effectively prevent sand, dust and other debris from interfering with the operation of the planetary gear mechanism 3, thereby extending the service life of the wheel hub.

Furthermore, a crawler drive frame 17 adapted to the power crawler is fixedly provided on the outer circumference of the power frame 1, and the wheel hub can be used as a crawler wheel hub matched with the crawler.

Furthermore, the built-in motor 2 is a servo motor, which has not only high precision but also low cost.

Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the present invention.

Claims (7)

1. The utility model provides a self-driven wheel hub, its characterized in that includes circular shape power frame, built-in motor, planetary gear mechanism, back shaft and output shaft, built-in motor with planetary gear mechanism lays in the power frame, back shaft and output shaft are laid power frame's both sides, just back shaft and output shaft all through the bearing with power frame rotates to be connected, built-in motor's casing with output shaft fixed connection, built-in motor's central transmission shaft drive planetary gear mechanism, planetary gear mechanism drive power frame rotates.

2. The self-driven hub according to claim 1, wherein the planetary gear mechanism comprises a central sun gear, a planetary gear set, a gear ring and a planetary gear carrier, the built-in motor drives the central sun gear to rotate through a central transmission shaft, the gear ring is fixed relative to a shell of the built-in motor, the planetary gear set is meshed with the central sun gear and the gear ring for transmission, the planetary gear set drives the planetary gear carrier to rotate, and the planetary gear carrier drives the power frame to rotate.

3. The self-driven hub according to claim 2, wherein the central sun gear is fixedly connected with a central transmission shaft of the built-in motor coaxially, an inner gear ring meshed with a planetary gear set is arranged on the inner side of the gear ring, the planetary gear carrier supports the planetary gear set, the gear ring is fixedly connected with a shell of the built-in motor through a connecting part, the connecting part is rotatably connected with the power frame through a bearing, and the planetary gear carrier is fixedly connected with the power frame.

4. A self-propelled hub as claimed in claim 3 wherein the planetary gear set comprises three sets of planetary gear units equiangularly disposed around the central sun gear, the planetary gear units being in meshed driving engagement with the central sun gear and the ring gear, the planet carrier being fixedly connected coaxially with the power frame, the planet carrier being provided with three sets of connecting shafts rotatably connected coaxially with the planetary gear units.

5. The self-driven hub of claim 1, wherein a hollow cavity is provided in the middle of the power frame, and the built-in motor and the planetary gear mechanism are both disposed in the hollow cavity.

6. The self-driven wheel hub according to claim 5, wherein a track driving frame body matched with the power track is fixedly arranged on the outer circumference of the power frame.

7. A self-driven hub according to claim 1, wherein said built-in motor is a servo motor.