CN203832232U - Electric drive system for double-transverse arm suspension wheel edge - Google Patents

Abstract

The utility model discloses a double-wishbone suspension wheel side electric drive system, an integrated drive assembly is fixed on the vehicle frame, and the active small pulley and the driven large pulley in the integrated drive assembly are connected and transmitted through a synchronous belt. Power, the driven large pulley and the double wishbone suspension structure form an integrated structure. The driven large pulley is connected to the drive shaft through a spline to transmit power. pin, and the hub transmits power to the rim via a bolted connection. The utility model has the advantages of reducing the unsprung mass and improving the ride comfort and wheel grounding performance of the vehicle.

Description

Double wishbone suspension wheel side electric drive system

technical field

The utility model belongs to the field of electric vehicle chassis and transmission, in particular to an electric drive system for double-wishbone suspension wheels.

Background technique

With the continuous rise of electric vehicles, a variety of driving forms of electric vehicles have emerged. The size of the car's unsprung mass directly affects the ride comfort and wheel grounding of the car. At present, the wheel-side electric drive system represented by electric wheels has the advantages of simple drive system and vehicle structure, large available space, and high transmission efficiency. The torque of each drive wheel can be independently controlled, which is conducive to improving driving performance under harsh road conditions. performance has become a research hotspot. However, since the motor is installed in the driving wheel, the unsprung mass of the car is relatively large, which is not conducive to the smoothness of the car and the grounding of the wheel.

In response to these problems, the main research directions at home and abroad are: the research of highly integrated electromechanical integration of electric wheels, the development of high power density motors, and structural innovations. Double-wishbone suspension, as a form of suspension with extremely excellent performance, has a large space for design optimization. Through optimized design, it can achieve good suspension performance and meet the set suspension requirements. It is widely used to focus on handling performance. in the car. Therefore, it is a problem to be solved urgently to apply the wheel-side drive integrated structure to the double-wishbone suspension and further reduce the unsprung mass.

Utility model content

The problem to be solved by the utility model is to provide a double-wishbone suspension wheel side electric drive system which effectively reduces the unsprung mass and has a simple structure.

In order to solve the above technical problems, the utility model provides a double wishbone suspension wheel side electric drive system, including wheel rim, wheel hub, hub bearing, kingpin, large bearing, drive shaft, upper wishbone, driven large belt wheel, synchronous belt, lower cross arm, small bearing, small bearing support, driving small pulley, motor and vehicle frame. The integrated drive assembly is fixed on the frame, the driving small pulley and the driven large pulley in the integrated drive assembly are connected to transmit power through the synchronous belt, and the driven large pulley and the double-wishbone suspension structure form an integrated structure , The driven large pulley is connected to the drive shaft through a spline to transmit power, the drive shaft is connected to the hub by a spline, the hub is supported on the kingpin through the hub bearing, and the hub transmits power to the rim through a bolt connection.

The double-wishbone suspension structure includes upper and lower cross-arms and a kingpin, wherein one end of the upper and lower cross-arms near the rim is connected to the kingpin through a ball joint, and the other end of the upper and lower cross-arms is connected to the frame through a ball joint , the drive shaft is supported in the main pin through a large bearing.

The integrated drive assembly includes a motor, a small driving pulley, a small bearing and a small bearing support. The small driving pulley is installed and supported in the small bearing support through the small bearing, and the small bearing support is connected to the motor through bolts. The integrated drive assembly becomes part of the sprung mass, greatly reducing the unsprung mass.

The driven large pulley is connected to the drive shaft through a spline and is fixed to the axial side of the drive shaft through a retaining ring, and the other side is attached to the inner surface of the large bearing. Therefore, the driven large pulley and the double wishbone suspension structure form an integrated structure.

Because when the wheel jumps up and down under the excitation of the random road surface, the driven large pulley will also swing with the kingpin of the double wishbone suspension structure, at this time the center distance between the driven large pulley and the driving small pulley will vary. changes, and there will be some twists. Therefore, the utility model utilizes the advantages of synchronous belt flexible transmission, that is, the center distance has a certain adjustable range, and the appropriate double-wishbone suspension parameters are selected through theoretical calculations, so that the inclination angle of the wheels and the wheel base during the suspension jumping process The change is small, so that the change in the center distance between the driven large pulley and the driving small pulley is within the acceptable range of pulley tension. At the same time, setting a suitable reduction transmission ratio can play the role of reducing speed and increasing torque.

The brake system of the utility model can adopt disc brake or drum brake.

The utility model can be used for the electric drive of the non-steering wheel, and can be used as a complete set when the rear wheel is driven.

The superior effect of the present utility model is:

(1) The structure of the wheel-side electric drive system is adopted, and the king pin of the double wishbone is connected to the driven large pulley at the same time, which has a high degree of integration;

(2) Fix the integrated driving components such as the drive motor and the active small pulley to the frame, thereby greatly reducing the unsprung mass and improving the ride comfort and wheel grounding of the car;

(3) The deceleration and torque-increasing transmission adopts the synchronous belt flexible transmission form, which has the advantage of variable center distance;

(4) Synchronous belt transmission is selected, compared with gear transmission, the requirements for sealing and lubrication are greatly reduced.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Explanation of symbols in the figure

1—rim; 2—hub;

3—wheel hub bearing; 4—king pin;

5—large bearing; 6—drive shaft;

7—upper wishbone; 8—driven large pulley;

9—synchronous belt; 10—lower wishbone;

11—small bearing; 12—small bearing support;

13—drive small pulley; 14—motor;

15—frame.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is further described.

As shown in Figure 1, the utility model provides a double-wishbone suspension wheel side electric drive system, including rim 1, wheel hub 2, hub bearing 3, king pin 4, large bearing 5, drive shaft 6, upper cross arm 7. Driven large pulley 8, synchronous belt 9, lower cross arm 10, small bearing 11, small bearing support 12, driving small pulley 13, motor 14, vehicle frame 15.

The driving small pulley 13 is installed and supported in the small bearing support 12 through the small bearing 11, the small bearing support 12 is connected with the motor 14 by bolts, and the motor 14, the driving small pulley 13, the small bearing 11 and the small bearing support 12 are assembled Integrate the driving assembly and fix it on the vehicle frame 15, and become a part of the sprung mass, thereby reducing the unsprung mass to a great extent. Double wishbone suspension structure comprises upper cross arm 7, lower cross arm 10 and kingpin 4, and upper cross arm 7, lower cross arm 10 are connected with kingpin 4 with bolt near wheel one end, and the other end is hinged with vehicle frame 15. The main pin 4 supports the drive shaft 6 through the large bearing 5 . The large driven pulley 8 is assembled into an integrated structure with the upper cross arm 7 and the lower cross arm 10 . The driving small pulley 13 and the driven large pulley 8 are connected to transmit motion through the synchronous belt 9 . The large driven pulley 8 is connected with the drive shaft 6 through splines to transmit power. The drive shaft 6 is splined to the hub 2, and the hub 2 is supported outside the main pin 4 through the hub bearing 3. The hub 2 transmits power to the rim 1 through a bolted connection.

Since the structure of the utility model adopts a synchronous belt flexible transmission, and the change of the center distance optimized by the relevant software is within the allowable tension range of the driving and driven pulleys, the structural scheme is feasible.

Selecting a suitable transmission ratio in the utility model can play the role of deceleration and torque increase.

The brake part in the utility model can adopt disc brake or drum brake, only need to install corresponding structure to install brake caliper or brake drum and get final product.

The utility model can be used for the electric drive of the non-steering wheel, and can be used as a complete set when the rear wheel is driven. the

Claims (4)

1. a double wishbone suspension is taken turns limit power drive system, it is characterized in that: integrated driven unit is fixed on vehicle frame, between active small pulley in integrated driven unit and driven large belt wheel, by Timing Belt, be connected transferring power, driven large belt wheel and double wishbone suspension structure form integral structure, driven large belt wheel is connected transferring power by spline with axle drive shaft, axle drive shaft and wheel hub adopt spline joint, wheel hub is supported on stub by hub bearing, and wheel hub is bolted transmission of power to wheel rim.

2. a kind of double wishbone suspension according to claim 1 is taken turns limit power drive system, it is characterized in that: described double wishbone suspension structure comprises upper and lower transverse arm and stub, place, the nearly wheel rim of upper, lower horizontal arm rest one end is connected with stub by ball pivot, the upper and lower transverse arm other end is connected with vehicle frame by ball pivot, and axle drive shaft is supported in stub by large bearing.

3. a kind of double wishbone suspension according to claim 1 is taken turns limit power drive system, it is characterized in that: described integrated driven unit comprises motor, active small pulley, little bearing and little bearing brackett, initiatively small pulley is installed and is supported in little bearing brackett by little bearing, and little bearing brackett is connected with motor by bolt.

4. a kind of double wishbone suspension wheel according to claim 1 limit power drive system, is characterized in that: described driven large belt wheel and axle drive shaft are fixed by back-up ring by spline joint and with the axial side of axle drive shaft, opposite side and large bearing medial surface laminating.