CN204548235U - A kind of Novel pure electrobus Rear secondary frame for vehicle - Google Patents

Abstract

The utility model discloses a new type rear auxiliary frame of a pure electric passenger car, which comprises: a main beam extending along the transverse direction of the vehicle; a longitudinal beam including a first longitudinal beam and a second longitudinal beam whose beams are parallel to each other , the front ends of the first longitudinal beam and the second longitudinal beam are fixed on the main beam; and the fixing part is arranged on the longitudinal beam and has the function of fixing the rear axle; the auxiliary beam has a bearing motor The structure, the auxiliary beam is vertically installed between the first longitudinal beam and the second longitudinal beam. The utility model has the advantages of high transmission efficiency, stable transmission, convenient disassembly and maintenance, and the longitudinal beam and cross beam on the sub-frame adopt variable cross-section design, which realizes the light weight of the sub-frame.

Description

A new type of pure electric passenger car rear subframe

technical field

The utility model relates to a passenger car auxiliary frame, more specifically, the invention relates to a novel pure electric passenger car rear auxiliary frame.

Background technique

At present, pure electric buses operating in China adopt three schemes: front-mounted motor, mid-mounted motor, and rear-mounted motor. In the front-mounted and mid-motor solutions, the distance between the motor installation position and the rear drive axle is relatively large, and a transmission shaft is required, which has a complex mechanism, takes up a large space, and has low transmission efficiency; while in the rear-mounted motor solution, the connection between the motor and the drive axle There are two methods: transmission shaft connection and direct connection; the transmission shaft connection also has the disadvantages of low transmission efficiency and large space occupation; in the direct connection scheme between the motor and the drive axle, since the motor is installed on the bus frame, when the suspension of the bus goes up and down When jumping, the motor and drive axle will generate large vibrations, which will affect the stability of the transmission.

Utility model content

It is an object of the present invention to solve at least the above-mentioned problems and to provide at least the advantages which will be described later.

The invention provides a novel pure electric passenger car rear subframe which improves the transmission efficiency of the electric passenger car, improves the transmission stability and is convenient for disassembly and maintenance.

Another purpose of the present invention is to install air springs at both ends of the main cross beam to increase the lateral distance and increase the roll stiffness of the vehicle body; without interference, the air springs are arranged closer to the axle, effectively increasing the luggage load. cabin space.

Another object of the present invention is that the longitudinal beams and cross beams on the sub-frame adopt a variable cross-section design, which realizes the weight reduction of the sub-frame.

In order to realize these purposes and other advantages according to the present invention, a kind of rear auxiliary frame of novel pure electric passenger car is provided, it is characterized in that, comprises:

a main beam extending in the transverse direction of the vehicle;

a longitudinal beam comprising a first longitudinal beam and a second longitudinal beam whose beams are parallel to each other, and the front ends of the first longitudinal beam and the second longitudinal beam are fixed on the main beam; and

The secondary beam has a structure for carrying the motor, and the secondary beam is vertically installed between the first longitudinal beam and the second longitudinal beam.

Preferably, the rear ends of the first longitudinal beam and the second longitudinal beam are hinged to the mounting seat.

Preferably, the mounting seat is fixedly connected with the vehicle frame.

Preferably, the first longitudinal beam and the second longitudinal beam are respectively equipped with a fixing piece for fixing the rear axle.

Preferably, the sub-beams include a first sub-beam and a second sub-beam.

Preferably, the motors are welded and fixed on the first sub-beam and the second sub-beam.

Preferably, it is characterized in that the motor fixed on the auxiliary beam is directly connected to the rear axle fixed by the fixing piece.

Preferably, the main beam adopts a rectangular cross-section, which has the function of stabilizing the sub-frame.

Preferably, air springs and dampers are installed at both ends of the main beam.

Preferably, the main beams and longitudinal beams adopt variable cross-sections.

The present invention at least includes the following beneficial effects: 1. The structure of the sub-frame enables the output end of the motor to be directly connected to the drive axle, which simplifies the transmission system, saves space, and improves transmission efficiency; The driving axle remains relatively static, which reduces the vibration and noise of the transmission system and improves the stability of the transmission system; at the same time, the motor is arranged close to the rear of the bus, and it is convenient and quick to open the motor compartment door of the bus for disassembly and maintenance. 2. The sub-frame can play the role of transmitting lateral load, eliminating the need for a stabilizer bar, which simplifies the entire structure; 3. The air springs at both ends of the main beam are arranged closer to the side wall of the vehicle body, which improves the roll stiffness of the vehicle body; The rear end of the longitudinal beam extends backwards longer, and the fulcrum of the rear hinge of the frame is close to the middle of the rear suspension section of the vehicle body, which effectively improves the force of the rear suspension part of the vehicle body and is more conducive to the lightweight of the vehicle body structure. 4. The longitudinal beams and cross beams are designed as straight beams, the production process is simple, and the manufacturing cost is low; and the structure of the three main beams is simple in force, and the main deformation is bending deformation. The design calculation error is small, which is more conducive to accurate design , while adopting variable cross-section design method, it is more conducive to the light weight of the sub-frame.

Other advantages, objectives and features of the present invention will partly be embodied through the following descriptions, and partly will be understood by those skilled in the art through the study and practice of the present invention.

Description of drawings

Fig. 1 is a schematic structural diagram of the rear sub-frame of a new pure electric passenger car described in the utility model.

Fig. 2 is a top view of the rear sub-frame structure of a new pure electric passenger car described in the utility model.

Fig. 3 is a front view of the rear sub-frame structure of a new pure electric passenger car described in the utility model.

Fig. 4 is a side view of the rear sub-frame structure of a new pure electric passenger car described in the utility model.

Fig. 5 is a schematic diagram of the rear sub-frame structure, rear axle and motor assembly structure of a new pure electric passenger car described in the utility model.

Fig. 6 is a schematic diagram of the assembly of the rear sub-frame structure of a new pure electric passenger car described in the utility model in the whole vehicle.

Detailed ways

The utility model will be described in further detail below in conjunction with the accompanying drawings, so that those skilled in the art can implement it by referring to the description.

It should be understood that terms such as "having", "comprising" and "including" as used herein do not entail the presence or addition of one or more other elements or combinations thereof.

Figure 1-4 shows an implementation form according to the present invention, which includes:

The sub-frame 100 is composed of a longitudinal beam 110, a main beam 120 and a sub-beam 130, wherein the main beam 120 and the longitudinal beam 110 are designed with variable cross-sections of straight beams, which can reduce the overall weight of the sub-frame 100 and save space.

The longitudinal beam 110 includes two identical and mutually parallel first longitudinal beams 111 and second longitudinal beams 112, the first longitudinal beam 111 is a metal beam with equal width, equal thickness and hollow variable section, including a fixing piece 113 and a mounting Seat 114; fixing part 113 is made of two iron plates and bolt fasteners, and it has the effect of fixing the rear axle 200. surface and ensure that the upper four threaded holes communicate with the through holes on the longitudinal beam 110, then place the rear axle 200, then place the upper iron plate on the rear axle 200 and ensure that the upper threaded holes and the lower iron plate are threaded The holes are aligned, and then four screws are passed through the threaded holes of the upper iron plate, the lower iron plate and the stringer 110 in sequence, the lower ends of the screws pass through the lower surface of the stringer 110, and finally fastened with bolts matching the screws ; One end of the mounting seat 114 is hinged with the longitudinal beam 111, and the other end is a structure that can fix the vehicle frame. The distance between the first longitudinal beam 111 and the second longitudinal beam 112 is preferably the same as the length of the secondary beam 130, and the front ends of the first longitudinal beam 111 and the second longitudinal beam 112 are welded symmetrically on the side of the main beam 121, about 1/2 The fixing parts at 3 fasten the rear axle 200 , and the rear end is fixedly connected to the vehicle frame through the mounting seat 114 .

The secondary beam 130 is composed of a first secondary beam 131 and a second secondary beam 132, the two ends of the secondary beam 130 are respectively welded and fixed on the inside of the first longitudinal beam 111 and the second longitudinal beam 112, and are perpendicular to the longitudinal beam; The motor 300 is welded and fixed on the beam 130, and the distance between the auxiliary beam 130 and the fixing member 113 is preferably such that the rear axle and the motor can be directly connected. The auxiliary beam 130 mainly plays a role of supporting the motor, and the position of the auxiliary beam 130 needs to ensure that the motor 300 can directly drive the rear axle 200 supported by the longitudinal beam 110 .

The main beam 120 is located at the front end of the subframe 100, and both ends of the main beam 120 are equipped with air springs and dampers 121. The arrangement of the air springs and dampers 121 can improve the roll stiffness of the vehicle body and play a role in shock absorption ; The main beam 120 plays the role of connecting the longitudinal beam 110 and stabilizing the sub-frame 100 .

As shown in Figures 5 and 6, the front end of the subframe 100 is a main beam 120, and air springs and dampers 121 are installed at both ends of the main beam 120, and the rear end surface of the main beam 120 is connected to the first longitudinal beam 111 and the second longitudinal beam 112. Fixing by welding, wherein the first longitudinal beam 111 and the second longitudinal beam 112 are parallel to each other and at the same distance from the main beam 120 , and at this time the longitudinal beam 110 is perpendicular to the main beam 120 . The rear portion on the first longitudinal beam 111 and the second longitudinal beam 112 is respectively welded and fixed to the first sub-beam 131 and the second sub-beam 132 perpendicular thereto, and the welding motor 300 on the first sub-beam 131 and the second sub-beam 132, the motor 300 is directly connected with the fixed rear axle 200 on the fixture 113, which can increase the driving efficiency of the motor to the rear axle, and the mounting seat 114 at the rear end of the first longitudinal beam 111 and the second longitudinal beam 112 is fixedly connected with the vehicle frame.

The number of devices and processing scales described here are used to simplify the description of the present invention. Applications, modifications and variations to the subframe of the present invention will be apparent to those skilled in the art.

As mentioned above, the present invention has the following beneficial effects: 1. The structure of the sub-frame directly connects the output end of the motor to the drive axle, which simplifies the transmission system, saves space, and improves transmission efficiency; , The motor and drive axle remain relatively static, reducing the vibration and noise of the transmission system and improving the stability of the transmission system; at the same time, the motor is arranged close to the rear of the bus, and it is convenient and quick to open the motor compartment door of the bus for disassembly and maintenance. 2. The sub-frame can play the role of transmitting lateral load, eliminating the need for a stabilizer bar, which simplifies the entire structure; 3. The air springs at both ends of the main beam are arranged closer to the side wall of the vehicle body, which improves the roll stiffness of the vehicle body; The rear end of the longitudinal beam extends backwards longer, and the fulcrum of the rear hinge of the frame is close to the middle of the rear suspension section of the vehicle body, which effectively improves the force of the rear suspension part of the vehicle body and is more conducive to the lightweight of the vehicle body structure. 4. The longitudinal beams and cross beams are designed as straight beams, the production process is simple, and the manufacturing cost is low; and the structure of the three main beams is simple in force, and the main deformation is bending deformation. The design calculation error is small, which is more conducive to accurate design , while adopting variable cross-section design method, it is more conducive to the light weight of the sub-frame.

Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and implementation. It can be applied to various fields suitable for the utility model. Additional modifications can readily be made by those skilled in the art. Therefore, the invention should not be limited to the specific details and examples shown and described herein, without departing from the general concept defined by the claims and their equivalents.

Claims (10)

1. a Novel pure electrobus Rear secondary frame for vehicle, is characterized in that, comprising:

Main beam, it extends along vehicular transverse direction;

Longeron, it comprises the first longeron and the second longeron that two beams are parallel to each other, and the front end of described first longeron and the second longeron is fixed on described main beam; And

Secondary crossbeam, it has the structure of carrying motor, and described secondary beam vertical is arranged between the first longeron and the second longeron.

2. Novel pure electrobus Rear secondary frame for vehicle as claimed in claim 1, is characterized in that, described first longeron and the second hinged mount pad in longeron rear end.

3. Novel pure electrobus Rear secondary frame for vehicle as claimed in claim 2, it is characterized in that, described mount pad is fixedly connected with vehicle frame.

4. Novel pure electrobus Rear secondary frame for vehicle as claimed in claim 1, is characterized in that, be separately installed with a connecting element, for fixing rear axle above described first longeron and the second longeron.

5. Novel pure electrobus Rear secondary frame for vehicle as claimed in claim 1, it is characterized in that, described secondary crossbeam comprises the first secondary crossbeam and the second secondary crossbeam.

6. Novel pure electrobus Rear secondary frame for vehicle as claimed in claim 5, is characterized in that, described first secondary crossbeam and the second secondary crossbeam are welded and fixed motor.

7. the Novel pure electrobus Rear secondary frame for vehicle according to any one of claim 4-6, is characterized in that, the rear axle that motor fixing on described secondary crossbeam is fixed with connecting element is directly connected.

8. Novel pure electrobus Rear secondary frame for vehicle as claimed in claim 1, is characterized in that, described main beam adopts square-section, has the function of firm subframe.

9. Novel pure electrobus Rear secondary frame for vehicle as claimed in claim 8, it is characterized in that, described main beam two ends are provided with air bellow and damping.

10. the Novel pure electrobus Rear secondary frame for vehicle according to any one of claim 1-6,8-9, is characterized in that, described main beam and longeron adopt variable section.