CN-122008837-A - Driving device, transport vehicle and application

Abstract

The invention relates to a drive device for a wheel-driven vehicle, comprising a planetary gear system comprising a sun gear, a ring gear, a planet carrier, and planet gears carried by the planet carrier and meshing with the sun gear and the ring gear, an electric motor for driving the sun gear, wheels non-rotatably connected with the ring gear, and an electromechanical brake for braking the sun gear and/or a drive shaft of the electric motor supplying the sun gear, the sun gear being arranged between the brake and the electric motor, and/or the brake being accommodated by an axial cutout of the planetary gear system.

Inventors

• H. Walter Hart
• Markus ehrlich

Assignees

• 斯特西运动有限公司

Dates

Publication Date

20260512

Application Date

20251110

Priority Date

20241109

Claims (19)

1. 1. A drive apparatus for a wheeled drive vehicle, the drive apparatus comprising: a planetary gear system comprising a sun gear, a ring gear, a planet carrier, and planet gears carried by the planet carrier and meshed with the sun gear and the ring gear; an electric motor for driving the sun gear; A wheel non-rotatably connected to the ring gear, and An electromechanical brake for braking at least one of the sun gear and a drive shaft of the electric motor that supplies the sun gear, wherein The sun gear is disposed between the brake and the electric motor, and the brake is located between two axial edges of the wheel.
2. 2. The drive device according to claim 1, comprising: at least two bearings for mounting the ring gear to the planet carrier.
3. 3. The driving device according to claim 2, wherein, The planet carrier is designed with two cheeks, one of the two bearings being arranged on the two cheeks of the planet carrier.
4. 4. The driving device according to claim 2, wherein, At least one of the at least two bearings is arranged between two axial edges of the wheel.
5. 5. The driving device according to claim 4, wherein, A first axial center between all of the at least two bearings is located between the two axial edges of the wheel.
6. 6. A driving device according to claim 3, wherein, The first axial center is at least substantially coincident with a second axial center of the wheel.
7. 7. The drive of claim 5, wherein the first axial center is positioned no more than 20% of an axial width of the wheel from the second axial center.
8. 8. The driving device according to claim 2, wherein, The internal teeth of the ring gear are arranged between two bearings of the at least two bearings in the axial direction, and Each of the planetary gears meshes with the internal teeth and the external teeth of the sun gear between two bearings of the at least two bearings.
9. 9. The driving device according to claim 1, wherein, The rotor of the brake is mounted to the drive shaft in a torque transmitting manner.
10. 10. The driving device according to claim 1, wherein, The rotor of the brake is connected to the drive shaft via a sliding key connection.
11. 11. The driving device according to claim 1, wherein, The planet carrier is fixed relative to at least one of the motor housing and the brake.
12. 12. The drive of claim 11, wherein the planet carrier is connected with at least one of the motor housing and the brake.
13. 13. The driving device according to claim 1, wherein, The wheel surrounds the brake and the brake is arranged between two axial edges of the wheel.
14. 14. The drive device according to claim 1, comprising: and the hub cover is used for covering the brake.
15. 15. The driving device according to claim 1, wherein, The ring gear has a contact surface for transmitting vertical bearing loads, the contact surface being formed at least partially cylindrically around the rotational axis of the sun gear and being arranged for connection with the rim of the wheel, and The contact surface surrounds at least one of the at least two bearings and is disposed radially outward of the at least two bearings.
16. 16. The driving device according to claim 1, wherein, An inner surface of at least one of the wheel and a rim of the wheel is in contact with the ring gear; The inner surface having a plurality of protrusions engaged in the ring gear, and The protrusion extends less than 50% of the axial width of the rim.
17. 17. Use of a plurality of drive units according to claim 1 as wheel drives or wheel hub gear motors for unmanned transport vehicles.
18. 18. Use of a plurality of drive devices according to claim 1 as wheel drives or hub gear motors for unmanned transport vehicles for driving the transport vehicles.
19. 19. An unmanned transportation vehicle comprising a plurality of drive arrangements according to claim 1.

Description

Driving device, transport vehicle and application Technical Field The following aspects relate to a drive arrangement for a wheeled drive vehicle, wherein the drive arrangement comprises a planetary gear system, an electric motor and wheels, to an unmanned transport vehicle comprising a drive arrangement, and to the use of a drive arrangement. Background It is known from the prior art that wheeled driven vehicles require drive means that ensure high efficiency and reliability. However, the known drive devices have drawbacks in terms of its design complexity and efficiency. Furthermore, the known drive devices are relatively large or insufficiently compact. Disclosure of Invention It is therefore an object to provide a solution that not only ensures an efficient power transmission, but also enables a compact integration. In particular, the drawbacks of the prior art will be avoided or at least substantially reduced. The object is achieved by the features according to the application. Advantageous embodiments are defined in the description and the figures. The disclosure of the description, drawings and claims can be combined with one another as required whenever technically possible. In particular, this object is achieved by a drive device for wheeled driven vehicles, comprising: A planetary gear system including a sun gear, a ring gear, a carrier, and a planetary gear carried by the carrier and meshed with the sun gear and the ring gear; An electric motor for driving the sun gear; A wheel non-rotatably connected to the ring gear, and An electromechanical brake for braking a drive shaft of the sun gear and/or an electric motor supplying the sun gear, Wherein the sun gear is arranged between the brake and the electric motor and/or the brake is accommodated by an axial cutout of the planetary gear system and/or by or in the wheel. In other words, the present invention relates to an electric wheel type driving device, for example. The wheel drive comprises a motor and an epicyclic gear comprising a sun gear driven by the motor, a ring gear and a planet carrier holding a number of planet gears in engagement with the sun gear and the ring gear. The ring gear is directly or indirectly connected with a wheel or tire (e.g., a rubber tire or a plastic tire) that transmits a driving force that originates from a motor and is transmitted to the ground via an epicyclic gear. Furthermore, a brake is provided, which can introduce a braking force into the wheels via the planetary gear system. The brake is compactly arranged in the wheel or remote from the electric motor, making it particularly easy to access. The proposed solution aims at creating a drive that is as compact as possible. By allowing the wheels to rotate with the ring gear or to be non-rotatably connected with the ring gear (in particular not with the planet carrier or sun gear), the axial length of the drive can be reduced. Essentially, the wheels may encircle the ring gear and be directly or indirectly connected with the ring gear in a torque transmitting manner. The non-rotatable connection between the wheels and the ring gear makes maximum use of the available radial installation space. In particular, the bearings and other components can be positioned in a space-saving manner and a reduction in axial length can be achieved. For example, in known drives, the planet carrier is typically connected to the wheels and the electric motor is connected to the sun gear. In most cases, the ring gear is arranged stationary and is in particular connected stationary to the electric motor. Unlike this known concept, as the invention progresses, it is recognized that the ring gear may be non-rotatably connected to the wheel. In particular, in a double-cheek planet carrier, a corresponding bearing can be arranged on one of the cheeks of the planet carrier, so that large radial loads are possible and bending moments or tilting moments at the drive can be reduced. According to this design, the proposed solution may allow access to the planetary gear system through the wheels, e.g. for maintenance purposes. The brake arrangement should be easy to maintain. A drive means refers to a device or system for providing driving force or torque to one or more wheels or traction wheels of a vehicle, for example. In particular, the drive is a hub drive, a hub motor or a hub gear motor. Typically, the drive means may convert electrical energy into mechanical and thermal energy. The drive means may comprise various mechanical and electrical components which interact to enable movement of the vehicle. For example, the drive means comprise at least one motor, at least one wheel and at least one transmission for connecting the motor to the wheel. The drive (in particular the motor and/or the transmission) is designed in such a way that it can absorb part of the vehicle weight. Vehicle types include, inter alia, vehicles that can be driven or driven by wheels or traction wheels. For example