CN203832218U - Synchronous belt speed-reduction wheel electric driving system with tensioning Macpherson suspension - Google Patents

Abstract

The utility model discloses a tensioned MacPherson suspension synchronous belt deceleration wheel side electric drive system, the integrated drive assembly is fixed on the vehicle frame, and the active small pulley and the driven large pulley of the integrated drive assembly pass through The synchronous belt is connected to transmit power, the tensioner is installed and fixed on the frame, and is located above the synchronous belt, the driven large pulley is splined to the drive shaft, the drive shaft is splined to the hub, and the hub is supported by the hub bearing on the In the McPherson kingpin of the MacPherson suspension structure, the hub is screwed to the rim. The tensioning wheel device can effectively tension the belt transmission structure. The utility model has the advantages of reducing the unsprung mass and improving the ride comfort and wheel grounding performance of the vehicle.

Description

Tensioned McPherson suspension synchronous belt reduction wheel side electric drive system

technical field

The utility model belongs to the field of chassis and transmission of electric vehicles, in particular to an electric drive system with tensioned McPherson 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 a 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. As a simple and commonly used independent suspension form, McPherson suspension has the advantages of large suspension optimization space, simple and reliable structure, etc., and is widely used as the front and rear suspension form of low-end and mid-end cars. Therefore, it is an urgent problem to use the integrated wheel drive structure for MacPherson suspension and further reduce the unsprung mass. the

Utility model content

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

In order to solve the above technical problems, the utility model provides a tensioned McPherson suspension wheel side electric drive system, including rims, hubs, hub bearings, MacPherson kingpins, large bearings, tension wheels, Synchronous belt, small bearing, motor, driving small pulley, small bearing support, frame, swing arm, driven large pulley, drive shaft. The integrated drive assembly is fixed on the frame, the driving small pulley and the driven large pulley of the integrated drive assembly are connected to transmit power through the synchronous belt, and the tensioner is installed and fixed on the frame, and is located above the synchronous belt. The large moving pulley is splined to the drive shaft, and is fixed to the axial side of the drive shaft through a retaining ring, and the other side is fitted to the inner side of the large bearing. The drive shaft is splined to the hub, and the hub is supported on the microphone through the hub bearing. In the McPherson kingpin of the Ferson suspension structure, the hub is screwed to the rim.

The MacPherson suspension structure includes a wishbone and a McPherson kingpin. One end of the wishbone is connected with the MacPherson kingpin by a rotating pair, and the other end is hinged with the vehicle frame. The MacPherson kingpin is supported by a large bearing Live the drive shaft, and connect the upper end of MacPherson king pin with the vehicle frame.

The integrated drive assembly includes a small bearing, a motor, a small driving pulley, 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 motor, the driving small pulley, the small bearing, and the small bearing support are assembled into an integrated structure and fixed on the vehicle frame to become a part of the sprung mass, thus greatly reducing the unsprung mass.

The power between the main and driven pulleys is driven by a synchronous belt, and the tension pulley is placed above the synchronous belt to play a tensioning role. The driven large pulley is connected to the drive shaft through a spline to transmit power. The drive shaft and the hub are connected by splines, the hub is supported in the McPherson king pin through the hub bearing, and the hub transmits power to the rim through bolt connection.

Because when the wheel jumps up and down under the action of random road surface excitation, the large driven pulley will also swing with the MacPherson suspension kingpin, and the center distance between the large driven pulley and the small driving pulley will change at this time. And there will be a certain twist. Therefore, the advantages of synchronous belt transmission (flexible transmission) are used in the utility model, that is, the center distance has a certain adjustable range, and the appropriate McPherson suspension parameters are selected through theoretical calculations to make the inclination angle of the wheel during the suspension jump process And the change of the wheelbase is small, so that the change of the center distance between the driven large pulley and the driving small pulley is within the acceptable range of pulley tension, so that the structural scheme is feasible. At the same time, setting an appropriate 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 MacPherson king pin is connected to the driven large pulley at the same time, which has a high degree of integration;

(2) Fix the integrated related 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—MacPherson kingpin;

5—Large bearing; 6—Tension wheel;

7—synchronous belt; 8—small bearing;

9—motor; 10—drive small pulley;

11—small bearing support; 12—frame;

13—cross arm; 14—driven large pulley;

15—drive shaft.

Detailed ways

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

As shown in Figure 1, the utility model provides a tensioned McPherson suspension wheel side electric drive system, including a wheel rim 1, a wheel hub 2, a hub bearing 3, a MacPherson kingpin 4, a large bearing 5, Tensioner 6, synchronous belt 7, small bearing 8, motor 9, driving small pulley 10, small bearing support 11, vehicle frame 12, transverse swing arm 13, driven large pulley 14, drive shaft 15.

The driving small pulley 10 is installed and supported in the small bearing support 11 through the small bearing 8, the small bearing support 11 is connected with the motor 9 through bolts, and the motor 9, the driving small pulley 10, the small bearing 8, and the small bearing support 11 are assembled Into an integrated structure and fixed on the vehicle frame 12, it becomes a part of the sprung mass, thereby greatly reducing the unsprung mass. One end of the swing arm 13 near the rim 1 is connected with the MacPherson kingpin 4 through a ball joint, the other end of the swing arm 13 is connected with the vehicle frame 12 through a ball joint, and the upper end of the MacPherson kingpin 4 is connected with the vehicle frame. McPherson Kingpin 4 supports drive shaft 15 through large bearing 5. The large driven pulley 14 is assembled into an integrated structure with McPherson (the swing arm 13 and the MacPherson kingpin 4). The driving small pulley 10 and the driven large pulley 14 are connected to transmit power through the timing belt 7, and the tensioning pulley 6 is supported and fixed on the vehicle frame 12 by a bracket (not shown in the figure), and the tensioning pulley 6 is located on the timing belt 7 top plays tensioning effect. The large driven pulley 14 is connected with the drive shaft 15 through a spline to transmit power. The driving shaft 15 is splined connected with the wheel hub 3, and the wheel hub 3 is supported in the McPherson king pin 4 through the wheel hub bearing 2. The hub 3 transmits power to the rim 1 through bolted connections.

Since the structure of the utility model adopts a flexible drive, that is, a synchronous belt drive, 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.

In the utility model, selecting a suitable transmission ratio can play the role of deceleration and torque increase.

In the utility model, the brake system can adopt a disc brake or a drum brake, and it only needs to install a corresponding structure to install a brake caliper or a brake drum.

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 (3)

1. one kind has the McPherson suspension wheel limit power drive system of tensioning, it is characterized in that: integrated driven unit is fixed on vehicle frame, the active small pulley of integrated driven unit is connected transferring power with driven large belt wheel by Timing Belt, one tension wheel is fixed on vehicle frame, and be positioned at the top of Timing Belt, driven large belt wheel and axle drive shaft spline joint, axle drive shaft and wheel hub spline joint, wheel hub is supported in the Mai Fuxun stub of McPherson suspension structure by hub bearing, and wheel hub and wheel rim are spirally connected.

2. the McPherson suspension wheel limit power drive system that has tensioning according to claim 1, it is characterized in that: described McPherson suspension structure comprises transversal swinging arm and Mai Fuxun stub, transversal swinging arm one end is connected by revolute pair with Mai Fuxun stub, the other end and vehicle frame are hinged, and Mai Fuxun stub supports axle drive shaft by large bearing.

3. the McPherson suspension wheel limit power drive system that has tensioning according to claim 1, it is characterized in that: described integrated driven unit comprises little bearing, motor, active small pulley, 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.