A wheel-side motor drive structure for golf carts

Abstract

This utility model provides a wheel-side motor drive structure for golf carts, comprising a hub motor mounting housing 1, a detachable and replaceable hub 2 (similar to replacing car wheels), a brushless external rotor motor, a planetary gearbox, and a motor drive control circuit board 5. The brushless external rotor motor includes a stator 3 fixed relative to the hub motor mounting housing 1, and an outer rotor (composed of a strongly magnetized outer rotor iron piece 4, an outer rotor aluminum piece 9, and a sun gear axle 6) fitted over the stator 3. The planetary gearbox is located inside the stator core, with an internal gear ring fixed within the stator core meshing with planetary gears 7. As the outer rotor rotates, the sun gear 6, fixed to the outer rotor aluminum piece 9, meshes with the planetary gears 7, and after deceleration, the planetary output carrier 8 outputs power to the hub 2. The wheel-side mounting housing 1 is fixedly connected to the frame. This design places the planetary gearbox and motor drive control circuit board inside the motor, and uses a wheel-side motor, thereby further reducing the size and weight of the drive component. The integrated design facilitates installation and subsequent replacement and maintenance; its structure is reasonable and its performance is good.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and in particular to a wheel-side motor drive structure for golf carts. Background Technology

[0002] The electric drive wheels currently used for the mobility drive of golf carts include a gearbox, a transmission assembly, a drive motor, and a wheel rotatably mounted outside the drive motor. The wheel is rotatably mounted on the drive motor via bearings. For example, the gearbox in publication number CN 212499859 U includes a lateral mounting part and a transverse mounting part connected to the top of the lateral mounting part. An installation space is formed between the lateral mounting part and the transverse mounting part. It also includes an internal gear ring that cooperates with the transmission assembly for transmission. The two end faces of the internal gear ring abut against the transmission assembly and the wheel, respectively, and the outer circumferential surface of the internal gear ring abuts against the inner wall of the wheel. This structure results in a large gearbox thickness, which leads to a large space occupied by the drive part. Summary of the Invention

[0003] The purpose of this utility model is to provide a wheel-side motor drive structure for golf carts that has a reasonable structure and good performance.

[0004] To achieve the above objectives, the technical solution provided by this utility model is as follows: a wheel-side motor drive structure for golf carts, comprising a wheel fixing shell, a wheel transmission shell, a stator, and a rotor. One side of the wheel fixing shell is connected to the frame, and the wheel transmission shell is located on one side of the wheel fixing shell. A stator is fixedly installed inside the wheel fixing shell, and the rotor is movably fitted inside the stator. A sun gear is located at the center of the rotor, and the sun gear is connected to a planetary output carrier via a bearing. The sun gear meshes with planetary gears, the planetary gears are connected to the planetary output carrier, and the planetary output carrier is connected to the wheel transmission shell.

[0005] The rotor includes a cylindrical body, one end of which is sealed by a turntable. A cylindrical outer rotor aluminum assembly is located at the center of the turntable. One end of the sun gear is fitted inside the outer rotor aluminum assembly, and the other end is fitted inside the planetary output carrier. A transmission gear is installed on the sun gear between the planetary output carrier and the outer rotor aluminum assembly. The transmission gear meshes with the planetary gear.

[0006] There is a circuit control board between the fixed shell and the stator.

[0007] Bearings are provided on the outer rotor aluminum assembly, planetary gears, and stator.

[0008] In this invention, after adopting the above-mentioned solution, the motor is connected to the frame on one side via a connector and has wiring. The motor housing consists of a wheel hub fixing shell and a wheel drive shell. The wheel hub fixing shell is connected to the frame (stationary), while the wheel drive shell rotates and drives the wheel. The wheel hub fixing shell is fixedly connected to the stator, and a circuit control board is located between the wheel hub fixing shell and the stator shell. The circuit control board controls the motor. The planetary gear is connected to the planetary output carrier, and the planetary output carrier is connected to the wheel drive shell, thereby driving the wheel through the spokes. This solution places the planetary gearbox and the motor drive control circuit board inside the motor and uses a wheel-side motor, thereby further reducing the size and weight of the drive unit. The integrated design facilitates installation and subsequent replacement and maintenance. Its structure is reasonable and its performance is good. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the external appearance of this utility model.

[0010] Figure 2 This is a schematic diagram of the overall structure of this utility model. Detailed Implementation

[0011] The present invention will be further described below with reference to all the accompanying drawings. The preferred embodiment of the present invention is as follows: The embodiments described in this paper with reference to the accompanying drawings are exemplary and are only used to explain this patent, and should not be construed as limiting this patent.

[0012] In the description of this patent, it should be understood that the terms “center,” “upper,” “lower,” “front,” “back,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this patent and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this patent.

[0013] In the description of this patent, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection or setting, a detachable connection or setting, or an integral connection or setting. Those skilled in the art can understand the specific meaning of the above terms in this patent according to the specific circumstances.

[0014] See appendix Figure 1 and attached Figure 2The wheel-side motor drive structure for a golf cart described in this embodiment includes a wheel fixing housing 1, a wheel transmission housing 2, a stator 3, and a rotor 4. One side of the wheel fixing housing 1 is connected to the frame, and the wheel transmission housing 2 is located on one side of the wheel fixing housing 1. The stator 3 is fixedly installed inside the wheel fixing housing 1, and the rotor 4 is movably fitted inside the stator 3. A sun gear 6 is located at the center of the rotor 4, and the sun gear 6 is connected to a planetary output carrier 8 via a bearing 10. The sun gear 6 meshes with a planetary gear 7, which is connected to the planetary output carrier 8. The planetary output carrier 8 is connected to the wheel transmission housing. The rotor 4 includes a cylindrical body, one end of which is sealed by a turntable. A cylindrical outer rotor aluminum assembly 9 is located at the center of the turntable. One end of the sun gear 6 is fitted inside the outer rotor aluminum assembly 9, and the other end is fitted inside the planetary output carrier 8. A transmission gear is installed on the sun gear 6 between the planetary output carrier 8 and the outer rotor aluminum assembly 9, and the transmission gear meshes with the planetary gear 7. A circuit control board 5 is located between the wheel fixing housing 1 and the stator 3. Bearings are provided on the outer rotor aluminum kit 9, planetary gear 7, and stator 3.

[0015] After adopting the above scheme, the planetary gears use a conventional gear set. The motor as a whole is connected to the frame on one side via a connector and has wiring. The motor housing consists of a wheel hub fixed housing and a wheel drive housing. The wheel hub fixed housing is connected to the frame (stationary), while the wheel drive housing rotates and drives the wheel. The wheel hub fixed housing is fixedly connected to the stator. A circuit control board is located between the wheel hub fixed housing and the stator housing, and the circuit control board controls the motor. The stator contains stator coils, and a rotor outer iron piece is located outside the stator coils. The rotor outer iron piece drives the rotor to rotate. A sun gear is connected to the center of the rotor, and the sun gear rotates with the rotor. A gear is located on the shaft at the other end of the sun gear and meshes with the planetary gears. Bearings are installed between the rotor, gear set, and stator to ensure that the rotor and gear set rotate while the stator does not rotate. The drive gear meshes with the planetary gears, the planetary gears are connected to the planetary output carrier, and the planetary output carrier is connected to the wheel drive housing, thereby driving the wheel through the spokes. This scheme places the planetary gears inside the motor and uses a wheel-side motor method, thereby further reducing the thickness of the drive part of the drive wheel motor. Its structure is reasonable and its performance is good.

[0016] The embodiments described above are merely preferred embodiments of this utility model and are not intended to limit the scope of implementation of this utility model. Therefore, all changes made in accordance with the shape and principle of this utility model should be covered within the protection scope of this utility model.

Claims

1. A wheel-side motor drive structure for a golf cart, characterized by: It includes a wheel fixed housing (1), a wheel transmission housing (2), a stator (3), and a rotor (4). The wheel fixed housing (1) is connected to the frame on one side, and the wheel transmission housing (2) is provided on one side of the wheel fixed housing (1). The stator (3) is fixedly installed inside the wheel fixed housing (1). The rotor (4) is movably fitted inside the stator (3). A sun gear (6) is provided at the center of the rotor (4). The sun gear (6) is connected to the planetary output carrier (8) through a bearing (10). The sun gear (6) meshes with the planetary gear (7). The planetary gear (7) is connected to the planetary output carrier (8). The planetary output carrier (8) is connected to the wheel transmission housing.

2. The wheel motor drive structure for a golf cart of claim 1, wherein: The rotor (4) includes a cylindrical body, one end of which is sealed by a turntable. A cylindrical outer rotor aluminum kit (9) is provided at the center of the turntable. One end of the sun gear (6) is fitted inside the outer rotor aluminum kit (9), and the other end is fitted inside the planetary output carrier (8). A transmission gear is installed on the sun gear (6) between the planetary output carrier (8) and the outer rotor aluminum kit (9). The transmission gear meshes with the planetary gear (7).

3. The wheel motor drive structure for a golf cart of claim 1, wherein: There is a circuit control board (5) between the wheel fixed shell (1) and the stator (3).

4. The wheel motor drive structure for a golf cart of claim 1, wherein: Bearings are provided on the outer rotor aluminum kit (9), planetary gear (7), and stator (3).

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