Miniaturized bus short rear suspension and integrated electric drive axle structure

Abstract

The utility model relates to the technical field of buses, and discloses a miniature bus short rear suspension and integrated electric drive axle structure which comprises a frame, a rear axle and a motor, the rear axle and the motor are connected and combined into an integrated electric drive axle, air bags are arranged on two sides of the integrated electric drive axle, the upper ends of the air bags are connected with the frame, and the lower ends of the air bags are connected with the integrated electric drive axle. An inclined shock absorber is arranged at the rear end of the integrated electric drive axle, and the upper end of the shock absorber is connected with a frame. The motor and the axle are combined into a whole to form the integrated electric drive axle, a transmission shaft is omitted, the axle can be close to the tail of the vehicle as much as possible, the vehicle is small, the axle distance is large, the standing area is guaranteed, a C-shaped beam is omitted, four air bags are changed into two air bags, a short rear suspension is made, the bearing capacity is guaranteed, and space is made for other systems.

Description

Technical Field

[0001] This utility model relates to the field of bus technology, specifically to a miniaturized bus short rear suspension and integrated electric drive axle structure. Background Technology

[0002] Currently, most buses on the market are 10-12 meters long. Due to their longer body and larger axle tonnage, the matching chassis, electrical components, and interior and exterior parts are also quite large, making the buses themselves expensive. With the increasing popularity of private cars, fewer people are taking buses. This situation of large buses and few passengers is clearly inappropriate and wasteful in the market, and maintenance and repair costs are also high. However, buses, as a public transportation tool, cannot be eliminated. Therefore, the market demand for smaller buses is becoming increasingly urgent.

[0003] Currently, the rear axle and motor of 10-12 meter buses on the market are connected together by a drive shaft, with a wheelbase of 5.6-5.9 meters between the front and rear axles. They adopt a four-airbag outward swing C-beam structure, which requires a lot of space for layout. If the wheelbase is shortened directly using traditional methods to make 10-12 meter buses into 8-meter minibuses, the wheelbase will only be about 4 meters. The overall layout of the vehicle will be uncoordinated. In addition, due to the short wheelbase, the standing area of ​​the whole vehicle is limited, which seriously affects the passenger capacity of the bus. Utility Model Content

[0004] The technical problem this invention aims to solve is that existing buses have few passengers and low revenue, while their large tonnage results in high maintenance and repair costs.

[0005] To solve the above-mentioned technical problems, the technical solution of this utility model is to provide a miniaturized bus short rear suspension and integrated electric drive axle structure, including a frame, a rear axle and a motor. The rear axle and the motor are connected and combined to form an integrated electric drive axle. Airbags are provided on both sides of the integrated electric drive axle. The upper end of the airbag is connected to the frame and the lower end is connected to the integrated electric drive axle. An inclined shock absorber is provided at the rear end of the integrated electric drive axle, and the upper end of the shock absorber is connected to the frame.

[0006] Optionally, an upper thrust rod seat and a lower thrust rod seat are welded to the frame at the front end of the integrated electric drive axle. A lower thrust rod assembly is connected to the lower thrust rod seat, and an upper thrust rod assembly is connected to the upper thrust rod seat. The other ends of the lower thrust rod assembly and the upper thrust rod assembly are respectively connected to the rear axle of the integrated electric drive axle.

[0007] Optionally, a hanger bracket is provided on the frame at the rear end of the integrated electric drive axle, and a lateral stabilizer bar is provided at the rear end of the integrated electric drive axle connected to the rear axle. The hanger bracket is located above the lateral stabilizer bar, and a hanger is connected between the hanger bracket and the lateral stabilizer bar.

[0008] Optionally, a control valve is provided at the rear end of the integrated electric drive bridge, and the control valve is connected to the air inlet of the airbag through a pipeline.

[0009] In summary, this utility model has at least one of the following beneficial effects:

[0010] 1. This utility model integrates the motor and axle into an integrated electric drive axle, eliminating the drive shaft. The axle can be placed as close to the rear of the vehicle as possible, resulting in a small vehicle with a large wheelbase, ensuring a large standing area. At the same time, the C-beam is eliminated, the four airbags are replaced with two airbags, and a short rear overhang is created to ensure load-bearing capacity and make room for other systems.

[0011] 2. This utility model features a short rear suspension design, which reduces the curb weight, reduces the rated load of the axle, and allows for the miniaturization of all components, thereby reducing the cost and selling price of the vehicle and minimizing maintenance and repair costs.

[0012] 3. The shock absorber of this utility model is inclined and arranged behind the bridge, which ensures the shock absorption function while effectively avoiding the risk of interference with the airbag.

[0013] 4. This utility model adopts a four-link vertical arrangement structure, realizing a full air suspension, ensuring the smoothness of the vehicle axle in the vertical direction, and improving ride comfort.

[0014] 5. This utility model places the stabilizer bar behind the axle, which improves the vehicle's anti-roll capability and achieves a truly short rear overhang structure.

[0015] 6. This utility model uses an ECAS system or a height valve control valve to realize the inflation and deflation of airbags through electronic or mechanical control, and quickly adjust the vehicle body to the designed height position. Attached Figure Description

[0016] Figure 1 This is an isometric schematic diagram of the miniaturized bus short rear suspension and integrated electric drive axle structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the front-end structure of the miniaturized bus short rear suspension and integrated electric drive axle structure of this utility model.

[0018] In the diagram: 1. Integrated electric drive bridge; 1-1. Motor; 2. Airbag; 3. Shock absorber; 4. Lower thrust rod assembly; 5. Lower thrust rod seat; 6. Upper thrust rod assembly; 7. Upper thrust rod seat; 8. Lateral stabilizer bar; 9. Borehole; 10. Borehole bracket; 11. Control valve. Detailed Implementation

[0019] The following combination Figure 1-2 The present invention will be described in further detail below.

[0020] This utility model discloses a miniaturized bus short rear suspension and integrated electric drive axle structure, with reference to Figure 1 The system includes a frame, a rear axle, and a motor 1-1. The rear axle and motor 1-1 are connected and combined to form an integrated electric drive axle 1, eliminating the drive shaft, increasing the wheelbase with the front axle, and maximizing the vehicle's standing area. Airbags 2 are located on both sides of the integrated electric drive axle 1. The upper end of the airbags 2 is connected to the frame, and the lower end is connected to the integrated electric drive axle 1. Compared to the traditional four-airbag structure, this new design is more compact, eliminating the C-beam and freeing up more space for other chassis components. An inclined shock absorber 3 is located at the rear end of the integrated electric drive axle 1, with the upper end of the shock absorber 3 connected to the frame. The risk of interference with airbag 2 is avoided; an upper thrust rod seat 7 and a lower thrust rod seat 5 are welded to the front frame of the integrated electric drive axle 1. A lower thrust rod assembly 4 is connected to the lower thrust rod seat 5, and an upper thrust rod assembly 6 is connected to the upper thrust rod seat 7. The other ends of the lower thrust rod assembly 4 and the upper thrust rod assembly 6 are respectively connected to the rear axle of the integrated electric drive axle 1. Both sides of the integrated electric drive axle 1 are provided with lower thrust rod assemblies 4 and upper thrust rod assemblies 6, forming a four-bar linkage mechanism, which ensures the smooth vertical movement of the rear axle and improves ride comfort.

[0021] In a further implementation, refer to Figure 2 The integrated electric drive axle 1 has a hanger bracket 10 on the frame at the rear end. The rear end of the integrated electric drive axle 1 has a lateral stabilizer bar 8 connected to the rear axle. The hanger bracket 10 is located above the lateral stabilizer bar 8. A hanger 9 is connected between the hanger bracket 10 and the lateral stabilizer bar 8, which increases the vehicle's anti-roll capability. The rear end of the integrated electric drive axle 1 has a control valve 11. The control valve 11 is connected to the air inlet of the airbag 2 through a pipeline. When the axle jumps up and down, the rod system forms an angle with the initial position, opening the control valve 11, thereby inflating and deflating the airbag 2 and adjusting the vehicle body to the design height.

[0022] This invention integrates the motor 2 and the axle into an integrated electric drive axle 1, eliminating the drive shaft and achieving a wheelbase of 5.1 meters, thus ensuring a comfortable standing area. It also eliminates the C-beam, reduces the number of airbags from four to two, and creates a short rear overhang, freeing up space for other systems. Because this invention reduces the curb weight of the 8-meter vehicle and the rated load of the axle, all components can be miniaturized, lowering the vehicle's cost and selling price, and reducing maintenance and repair costs.

[0023] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A miniaturized bus short rear suspension and integrated electric drive axle structure, characterized in that, The vehicle includes a frame, a rear axle, and a motor (1-1). The rear axle and the motor (1-1) are connected and combined to form an integrated electric drive axle (1). Airbags (2) are provided on both sides of the integrated electric drive axle (1). The upper end of the airbag (2) is connected to the frame, and the lower end is connected to the integrated electric drive axle (1). An inclined shock absorber (3) is provided at the rear end of the integrated electric drive axle (1). The upper end of the shock absorber (3) is connected to the frame.

2. The miniaturized bus short rear suspension and integrated electric drive axle structure according to claim 1, characterized in that, An upper thrust rod seat (7) and a lower thrust rod seat (5) are welded to the front frame of the integrated electric drive axle (1). A lower thrust rod assembly (4) is connected to the lower thrust rod seat (5), and an upper thrust rod assembly (6) is connected to the upper thrust rod seat (7). The other ends of the lower thrust rod assembly (4) and the upper thrust rod assembly (6) are respectively connected to the rear axle of the integrated electric drive axle (1).

3. The miniaturized bus short rear suspension and integrated electric drive axle structure according to claim 1, characterized in that, The integrated electric drive axle (1) is provided with a hanger bracket (10) on the frame at the rear end. The integrated electric drive axle (1) is provided with a lateral stabilizer bar (8) connected to the rear axle. The hanger bracket (10) is located above the lateral stabilizer bar (8). A hanger (9) is connected between the hanger bracket (10) and the lateral stabilizer bar (8).

4. The miniaturized bus short rear suspension and integrated electric drive axle structure according to claim 1, characterized in that, The integrated electric drive bridge (1) is equipped with a control valve (11) at its rear end, and the control valve (11) is connected to the air inlet of the airbag (2) through a pipeline.

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