Rear wheel driving device of reverse three-wheeled electric vehicle

Abstract

The utility model discloses a reverse three-wheeled electric vehicle rear wheel driving device which comprises a wheel shaft, a needle bearing, a deep groove ball bearing, an end cover, a rotor, a stator winding, a second deep groove ball bearing, a gear B, a gear C, a spline hollow shaft, a rotary induction magnetic ring and a brake disc. A stator winding is arranged outside the rotor, the stator is fixed to the motor shell, the outer side of the rotor is connected with an end cover through a deep groove ball bearing and a third framework oil seal, a gear A is machined at the tail end of the motor hollow shaft and meshed with a gear C through a gear B, the gear C is connected with a hub through a spline hollow shaft, and the hub is matched with a brake pad. And a rotary induction magnetic ring is also arranged on the axle on the outer side of the brake pad. The device is reasonable in structural design, stable in operation, low in working noise and small in impact load; the transmission system has no obvious structure deformation during operation, and the device works stably and is suitable for long-term operation; a high transmission ratio can be achieved, and the mechanical efficiency is high. The chassis occupies small space, and the vehicle body layout is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of rear wheel drive of a reverse three-wheel electric vehicle, in particular to a rear wheel drive device of a reverse three-wheel electric vehicle. Background Art

[0002] The inverted three-wheeled electric vehicle is a novel new energy vehicle with the advantages of strong grip, flexible turning, strong braking force and good driving stability.

[0003] Existing rear-wheel drive systems for inverted three-wheeled electric vehicles generally draw inspiration from the drive system of traditional two-wheeled vehicles. Sprockets are placed on the rear drive wheel and on the motor output shaft, respectively, and the motor torque is transmitted to the rear wheel via a chain. The sprockets on the motor end and the drive wheel generally have different diameters to meet a certain reduction ratio. Chain drive is widely used in small two-wheeled and three-wheeled vehicles, but this structure has some significant drawbacks. The main ones are as follows:

[0004] 1. The chain drive speed fluctuates and cannot maintain a constant instantaneous transmission ratio. There is noise during operation and it is easy to generate large noise and impact load at high speed.

[0005] 2. After long-term operation, the chain is prone to stretching and deformation. After the chain links are stretched, the operation becomes unstable and it is easy to jump teeth.

[0006] 3. The transmission ratio of the chain drive cannot be too high. Generally, it is necessary to equip the motor output with a first-stage reduction device to increase the mechanical transmission efficiency.

[0007] 4. The installation position of the motor and chain takes up chassis space, which brings certain difficulties to the chassis layout. Utility Model Content

[0008] In response to the shortcomings of the existing technology, the present utility model aims to provide a rear-wheel drive device for a three-wheeled electric vehicle with a reasonable structural design, smooth operation, low operating noise, and low impact load. The device has no noticeable structural deformation during operation of the transmission system, and is stable and suitable for long-term operation. It can achieve a high transmission ratio and high mechanical efficiency. It takes up little chassis space, facilitating vehicle layout.

[0009] In order to achieve the above-mentioned purpose, the present invention is realized through the following technical scheme: a rear wheel drive device of a reverse three-wheeled electric vehicle, including a wheel axle, a needle roller bearing, a deep groove ball bearing, an end cover, a rotor, a stator winding, a brake pad, a B gear, a C gear, a splined hollow shaft, a rotating induction magnetic ring and a brake disc. A motor hollow shaft is provided on the wheel axle through a needle roller bearing, a rotor is connected to the outer outer shell of the motor hollow shaft, a stator winding is provided on the outside of the rotor, the stator is fixed to the motor housing, the outer side of the rotor is connected to the end cover through a deep groove ball bearing and a third skeleton oil seal, an A gear is processed at the end of the motor hollow shaft, the A gear is meshed with the C gear through the B gear, the C gear is connected to the wheel hub through the splined hollow shaft, the wheel hub cooperates with the brake pad, and a rotating induction magnetic ring is also provided on the wheel axle outside the brake pad.

[0010] Preferably, the gear A, gear B and gear C are all cylindrical gears.

[0011] Preferably, the rotor is a permanent magnet rotor of a motor.

[0012] Preferably, the spline hollow shaft is the output shaft of the reducer, an external spline hole is provided at the center of the spline hollow shaft, an internal spline hole is provided on the wheel hub, and the external spline hole cooperates with the internal spline hole.

[0013] Preferably, both ends of the wheel axle are provided with steps and external threads and are fixed to the rear fork of the frame.

[0014] The utility model has the following beneficial effects:

[0015] 1. Cylindrical gear transmission is adopted, and there is no impact load during operation.

[0016] 2. Gear transmission is adopted. The gear box and the motor are in the same housing. The motor output shaft and the reduction assembly are integrated into one structure. The gear box is filled with lubricating oil, which can run for a long time.

[0017] 3. The cylindrical gear has two-stage reduction, and the transmission ratio and transmission efficiency are higher than those of chain transmission.

[0018] 4. The motor and reducer body are arranged in the middle of the rear wheel hub. The output shaft of the device directly drives the rear wheel without taking up other space on the chassis. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments;

[0020] Figure 1 It is a structural diagram of the utility model;

[0021] Figure 2 for Figure 1 AA section view;

[0022] Figure 3It is a half-section view of the present invention. DETAILED DESCRIPTION

[0023] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0024] Reference Figure 1-3 , this specific embodiment adopts the following technical solution: a rear wheel drive device of a reverse three-wheeled electric vehicle, including a wheel axle 1, a needle roller bearing 2, a deep groove ball bearing 3, an end cover 4, a rotor 5, a stator winding 6, a brake pad 7, a B gear 8, a C gear 9, a splined hollow shaft 10, a rotating induction magnetic ring 16 and a brake disc 17. A motor hollow shaft 18 is provided on the wheel axle 1 through a needle roller bearing 2. The rotor 5 is connected to the outer surface of the motor hollow shaft 18. The stator winding 6 is provided on the outside of the rotor 5. The stator is fixed to the motor housing. The outer side of the rotor 5 is connected to the end cover 4 through a deep groove ball bearing 3 and a third skeleton oil seal 15. An A gear 19 is processed at the end of the motor hollow shaft 18. The A gear 19 is meshed with the C gear 9 through the B gear 8. The C gear 9 is connected to the wheel hub 20 through the splined hollow shaft 10. The wheel hub 20 cooperates with the brake pad 7. A rotating induction magnetic ring 16 is also provided on the wheel axle 1 outside the brake pad 7.

[0025] It is worth noting that the gear A, gear B and gear C are all cylindrical gears.

[0026] It is worth noting that the rotor 5 is a permanent magnet rotor of the motor.

[0027] It is worth noting that the spline hollow shaft 10 is the output shaft of the reducer, an external spline hole is provided at the center of the spline hollow shaft 10, and an internal spline hole is provided on the wheel hub 20, and the external spline hole and the internal spline hole cooperate with each other.

[0028] In addition, both ends of the wheel axle 1 are provided with steps 11 and external threads 12, which are fixed to the rear fork of the frame.

[0029] The rear-wheel drive device of the inverted three-wheeled electric vehicle of this specific embodiment consists of a permanent magnet synchronous motor, a gear reduction assembly, a hub assembly, an axle, a splined hollow shaft, a brake disc, and the like. Its working principle is as follows: the output of the permanent magnet synchronous motor hollow shaft is provided, and the end of the hollow shaft has a cylindrical gear, which is directly connected to the two-stage cylindrical gear reduction assembly; the output shaft of the reduction assembly has a central external spline hole; the center of the hub assembly has an internal spline hole; the reduction assembly drives the hub assembly through the external splines of the splined hollow shaft; and the brake disc is installed on the other side of the hub assembly (opposite to the motor side). The axle passes through the synchronous motor hollow shaft, gear reduction assembly, splined hollow shaft, hub assembly, brake disc, and other components, with stepped shafts and external threads arranged at both ends, and is fixedly connected to the rear fork of the frame.

[0030] The permanent magnet synchronous motor, gear reduction assembly, and spline hollow shaft of this specific embodiment are assembled into a whole, installed and hidden inside the wheel hub, with no exposed parts except the wheel axle. After being combined with the wheel hub, they are connected to the frame as a whole, with easy installation and compact structure.

[0031] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. A rear wheel drive device for a three-wheeled electric vehicle, characterized in that: The invention comprises a wheel shaft (1), a needle roller bearing (2), a deep groove ball bearing (3), an end cover (4), a rotor (5), a stator winding (6), a brake pad (7), a B gear (8), a C gear (9), a spline hollow shaft (10), a rotating induction magnetic ring (16) and a brake disc (17). A motor hollow shaft (18) is provided on the wheel shaft (1) through the needle roller bearing (2). The rotor (5) is connected to the outer surface of the motor hollow shaft (18). The stator winding (6) is provided on the outside of the rotor (5). The stator and the motor are connected. The machine housing is fixed, the outer side of the rotor (5) is connected to the end cover (4) through a deep groove ball bearing (3) and a third skeleton oil seal (15), the end of the motor hollow shaft (18) is processed with an A gear (19), the A gear (19) is meshed with the C gear (9) through the B gear (8), the C gear (9) is connected to the wheel hub (20) through the spline hollow shaft (10), the wheel hub (20) is matched with the brake pad (7), and a rotating induction magnetic ring (16) is also provided on the wheel shaft (1) outside the brake pad (7).

2. The rear wheel drive device of a three-wheeled electric vehicle according to claim 1, characterized in that: The gear A, gear B and gear C are all cylindrical gears.

3. The rear wheel drive device of a three-wheeled electric vehicle according to claim 1, characterized in that: The rotor (5) is a permanent magnet rotor of a motor.

4. The rear wheel drive device of a three-wheeled electric vehicle according to claim 1, characterized in that: The spline hollow shaft (10) is the output shaft of the speed reducer. The center of the spline hollow shaft (10) is provided with an external spline hole. The wheel hub (20) is provided with an internal spline hole. The external spline hole and the internal spline hole are matched.

5. The rear wheel drive device of a three-wheeled electric vehicle according to claim 1, characterized in that: Both ends of the wheel axle (1) are provided with steps (11) and external threads (12), and are fixed to the rear fork of the frame.

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