CN108248321B

CN108248321B - Suspension system and electric automobile

Info

Publication number: CN108248321B
Application number: CN201611248329.5A
Authority: CN
Inventors: 李庚申; 郭建发; 张拔林; 秦宬; 彭旺
Original assignee: BYD Co Ltd
Current assignee: BYD Co Ltd
Priority date: 2016-12-29
Filing date: 2016-12-29
Publication date: 2020-03-31
Anticipated expiration: 2036-12-29
Also published as: CN108248321A

Abstract

The utility model relates to a suspension system and electric automobile, suspension system are used for connecting between transaxle and frame (3), the transaxle includes axle housing (1) and arranges driving motor (2) at this axle housing (1) center in, suspension system is including being used for connecting driving motor (2) with first damper between frame (3). The suspension system that this disclosure provided has designed the first damper who arranges between motor and frame, can effectively promote the stability of the motor drive axle that the barycenter takes place to squint after having installed the motor, promotes whole car travelling comfort then.

Description

Suspension system and electric automobile

Technical Field

The present disclosure relates to the field of vehicle suspensions, and in particular, to a suspension system and an electric vehicle using the same.

Background

Suspension systems are the key mechanism in vehicles for transmitting forces between the transaxle and the frame, and meet vehicle comfort requirements through elastic elements, shock absorbers, etc. Among them, the conventional suspension system includes a leaf spring, a damper, and the like. The arrangement structure and the form of each component are widely applied to matching with a fuel vehicle drive axle. However, with the rapid advance in the field of electric automobiles, the design of the suspension system which can be well matched with the motor drive axle to improve the comfort of the whole automobile has positive significance.

Disclosure of Invention

It is an object of the present disclosure to provide a suspension system that better matches the motor drive axle to promote overall vehicle comfort.

It is another object of the present disclosure to provide an electric vehicle that uses the suspension system provided by the present disclosure.

In order to achieve the above object, the present disclosure provides a suspension system for connecting between a drive axle and a vehicle frame, the drive axle including an axle housing and a drive motor disposed in the center of the axle housing, the suspension system further including a first damping mechanism for connecting between the drive motor and the vehicle frame.

Optionally, the suspension system further comprises a second shock absorbing mechanism; the second damping mechanism is connected the axle housing with between the frame, perhaps the second damping mechanism is connected suspension system's stabilizer bar assembly with between the frame.

Optionally, the second shock absorbing mechanism includes a first shock absorber and a second shock absorber, the first shock absorber and the second shock absorber are symmetrically located at two sides of the driving motor, and the first shock absorbing mechanism includes a third shock absorber, and the third shock absorber is spatially located between the first shock absorber and the second shock absorber.

Optionally, on the same cross section, the third damper is arranged in an isosceles triangle with the first damper and the second damper.

Optionally, the first damping mechanism includes a third damper, an upper end of the third damper is hinged to the frame through a first support, and a lower end of the third damper is hinged to the housing of the driving motor through a second support.

Optionally, the first support is formed into a U-shaped structure, a bottom wall of the U-shaped structure is used for being fixedly connected with the frame, and a first pin shaft for hinging the upper end of the third shock absorber is connected between two side walls.

Optionally, the second support is formed into an L-shaped structure, one end of the L-shaped structure is fixedly connected to the housing, and the other end of the L-shaped structure is provided with a hinge seat, and a second pin for hinging the lower end of the third shock absorber is connected to the hinge seat.

Optionally, the third damper is arranged in a vertical direction.

Optionally, the third shock absorber is a double tube hydraulic shock absorber or a spring shock absorber.

Optionally, the suspension system further comprises a leaf spring assembly connected between the axle housing end and the vehicle frame.

Optionally, the suspension system further comprises a stabilizer bar assembly connected between the axle housing and the vehicle frame.

The invention further provides an electric automobile which comprises the suspension system provided by the disclosure.

Through above-mentioned technical scheme, this suspension system that openly provides has designed the first damper who arranges between motor and frame, can effectively promote the stability of the motor drive axle that the skew takes place for the barycenter after having installed the motor, promotes whole car travelling comfort then.

Additional features and advantages of the disclosure will be set forth in the detailed description which follows.

Drawings

The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:

fig. 1 is a schematic perspective view of a suspension system according to an exemplary embodiment of the present disclosure.

Detailed Description

The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.

In the present disclosure, unless otherwise specified, use of directional terms such as "upper, lower, left, and right" is generally defined with reference to the drawing direction in the drawings, and "inner and outer" refer to the inner and outer of the outline of the corresponding component. As shown in fig. 1, an exemplary embodiment of the present disclosure provides a suspension system and a vehicle using the same, which may be a hybrid vehicle or a pure electric vehicle. The suspension system is used for connecting between a drive axle and a vehicle frame 3, and the drive axle comprises an axle housing 1 and a drive motor 2 arranged in the center of the axle housing 1, namely the drive axle is a central integrated motor drive axle of a vehicle. Wherein the drive motor is any drive motor known in the art to drive the movement of the wheel.

For this electric drive axle, because driving motor 2 is usually great, can bulge in axle housing 1 to cause the barycenter of transaxle to produce the skew with the barycenter of axle housing, to this end, the suspension system that this disclosure provided still includes the first damper that is used for connecting between driving motor 2 and frame 3. Like this, the suspension system that this disclosure provided has designed the first damper who arranges between driving motor 2 and frame 3, consequently, can effectively promote the stability of the motor drive axle that has driving motor, for example, can effectively solve at the in-process of traveling, because the existence of motor makes the barycenter of motor drive axle produce skew axle center and the whole car travelling comfort problem that causes, promotes whole car travelling comfort then.

In the present exemplary embodiment, as shown in fig. 1, the present disclosure provides a suspension system further comprising leaf spring assemblies 44 connected between the ends of the axle housing and the vehicle frame 3, specifically two sets of floor spring assemblies, symmetrically mounted on the two ends of the axle housing by U-bolts 7 to ensure stable force transmission between the drive axle and the vehicle frame. In addition, the suspension system further includes a stabilizer bar assembly 6 connected between the axle housing 1 and the vehicle frame 3, thereby ensuring stability of the vehicle when turning. The leaf spring assembly 44 and the stabilizer bar assembly 5 in the present embodiment are all known in the art, and the structure and the connection manner with the relevant components are not described herein. In addition, in the present exemplary embodiment, the present disclosure provides a suspension system including a second damper mechanism for connecting between the axle housing 1 and the vehicle frame 3, such as a damper, a leaf spring assembly, or the like, connected between the axle housing 1 and the vehicle frame 2 for stabilizing the axle housing 1.

In the present exemplary embodiment, the second damper mechanism includes a first damper 41 and a second damper 42, and in the preferred embodiment, the first damper 41 and the second damper 42 are symmetrically located on both sides of the drive motor 2, i.e., connected between the axle housing 1 and the vehicle frame 2 with the drive motor as a center of symmetry. In other modified embodiments, the first damper 41 and the second damper 42 need not be defined symmetrically on both sides of the drive motor 2, but need only be connected between the axle housing 1 and the vehicle frame 3 or between the stabilizer bar assembly 6 and the vehicle frame 3 to damp the vehicle frame and the axle housing.

The first damping mechanism comprises a third damper 43 located on the plane of symmetry of the first and second dampers. The center plane of symmetry here means that the two linear dampers are symmetrical about the center plane. Therefore, the stabilizing effect of the three shock absorbers on the drive axle is more uniform, and the effect is better. Of course, in other modified embodiments, the third damper need not be limited to be located on the center plane of symmetry of the first and second dampers, such as the third damper is located between the first and second dampers, and such as the third damper is formed with the first and second dampers to stabilize the axle housing and the vehicle frame, the drive motor, and the vehicle frame.

Further, the third damper 43, the first damper 41 and the second damper 42 are arranged in an isosceles triangle, that is, they form a stable structure supported by three points, where the three dampers are arranged in an isosceles triangle, that is, on any horizontal plane, the cross sections of the three dampers are located at three angles of the isosceles triangle, respectively, and the third damper is located at the vertex angle of the isosceles triangle because the first damper and the second damper are symmetrical. Like this, first and second bumper shock absorbers can effectively be stabilized to axle housing 1, and third bumper shock absorber 43 then stabilizes to driving motor 2, and the three makes whole motor-drive axle's stability better through arranging of isosceles triangle, is particularly useful for driving motor 2 can protrusion in axle housing 1 and cause the structure of the motor-drive axle of barycenter skew problem to guarantee the travelling comfort of vehicle. In other possible embodiments, the third damper may be coplanar with the first and second dampers while being located on the center plane of symmetry, and further, the second damper mechanism and the first damper mechanism may be formed as other types of damper mechanisms known in the art, respectively.

In the present embodiment, as shown in fig. 1, the first shock absorber 41, the second shock absorber 42 and the third shock absorber 43 may be double-tube hydraulic shock absorbers, and the working principle is that when the relative motion between the vehicle frame or the vehicle body and the drive axle is caused by the shock, the piston in the shock absorber moves up and down, and the oil in the shock absorber cavity repeatedly flows from one cavity to the other cavity through different apertures. At the moment, the friction between the hole wall and the oil and the internal friction between oil molecules form damping force on vibration, so that vibration energy is converted into oil heat energy, and then the oil heat energy is absorbed by the shock absorber and is emitted into the atmosphere. In addition, the first, second, and

third dampers

41, 42, and 43 may also be spring dampers in which damping is achieved by springs. In other embodiments, various dampers in the art may be used with the present disclosure.

In order to mount the third shock absorber 43 in a linear structure, as shown in fig. 1, the upper end of the third shock absorber 43 is hinged to the frame 3 through a first support 51, and the lower end is hinged to the housing of the driving motor 2 through a second support 52. Therefore, the two ends of the third shock absorber can be movably connected, and irregular vibration of a driving axle in the driving process of a vehicle can be adapted.

Specifically, as shown in fig. 1, the first support 51 is formed in a U-shaped structure, i.e., includes a bottom wall and side walls on both sides of the bottom wall, wherein the bottom wall of the U-shaped structure is used for being fixedly connected with the vehicle frame, such as detachably fixed by a fastener such as a bolt, or directly welded to the vehicle frame. And a first pin shaft for hinging the upper end of the third shock absorber 43 is connected between the two side walls of the first shock absorber, the first pin shaft can be formed by bolts, and a hinging hole which is rotatably sleeved outside the first pin shaft can be formed at the upper end of the third shock absorber 43, so that the hinged installation of the first pin shaft and the second pin shaft is realized.

In addition, as shown in fig. 1, in order to facilitate connection to the housing of the driving motor 2, the second bracket 52 is formed in an L-shaped structure having one end fixedly connected to the housing and the other end provided with a hinge seat 53 to which a second pin for hinging the lower end of the third damper 43 is connected. Wherein the second support of L shape structure can form into platelike structure and adopt arc transition inflection, makes the position of second round pin axle can follow the casing outwards draw forth and dodge the structure of motor itself and be convenient for set up articulated seat 53 on the one hand, and on the other hand, the intensity of the L shape structure of arc platelike can obtain guaranteeing to make the installation of third bumper shock absorber stable.

The structure of the hinge base 53 may be similar to that of the first base, and it may be an L-shaped structure and form a U-shaped structure together with the second base, wherein the second base may serve as a side wall of the U-shaped structure, so that a second pin may be connected between the side wall of the L-shaped structure and the second base to realize the hinge connection with the lower end of the third shock absorber 43.

In addition, in the exemplary embodiment, in order to enhance the shock absorbing effect of the third shock absorber, it may be designed that the third shock absorber is inclined at an angle of not more than 20 ° in the vertical direction, which is also inclined on the center plane of symmetry of the first and second shock absorbers. In a preferred embodiment, the third shock absorber is inclined at an angle of not more than 10 ° in the vertical direction, and more preferably, the third shock absorber is arranged in the vertical direction, for example, by the first and second supports in the above, so that the third shock absorber can be perpendicular to the horizontal frame, and can transmit force and absorb shock more effectively without generating component force in other directions.

The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.

It should be noted that, in the foregoing embodiments, various features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various combinations that are possible in the present disclosure are not described again.

In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.

Claims

1. A suspension system for connection between a drive axle and a vehicle frame (3), said drive axle comprising an axle housing (1) and a drive motor (2) disposed on the axle housing (1), characterized in that the suspension system comprises a first damping mechanism for connection between the drive motor (2) and the vehicle frame (3);

the suspension system further includes a second damping mechanism; the second damping mechanism is connected between the axle housing (1) and the frame (3), or the second damping mechanism is connected between a transverse stabilizer bar assembly (6) of the suspension system and the frame (3);

the second shock absorption mechanism comprises a first shock absorber (41) and a second shock absorber (42), the first shock absorber (41) and the second shock absorber (42) are symmetrically positioned on two sides of the driving motor (2), and the first shock absorption mechanism comprises a third shock absorber (43) which is positioned between the first shock absorber and the second shock absorber in space.

2. Suspension system according to claim 1, characterized in that, in the same cross section, said third shock absorber (43) is arranged in an isosceles triangle with said first shock absorber (41) and said second shock absorber (42).

3. Suspension system according to claim 1, characterized in that said first damping mechanism comprises a third damper (43) hinged at its upper end to said frame (3) by means of a first abutment (51) and at its lower end to the housing of said drive motor (2) by means of a second abutment (52).

4. A suspension system according to claim 3, wherein said first support (51) is formed as a U-shaped structure having a bottom wall for fixed connection to said frame and a first pin for hinging the upper end of said third shock absorber (43) between the two side walls.

5. A suspension system according to claim 3, wherein the second bracket (52) is formed in an L-shaped configuration having one end fixedly connected to the housing and the other end provided with a hinge seat (53) to which a second pin for hinging the lower end of the third shock absorber is connected.

6. Suspension system according to any of claims 1-5, characterized in that the third shock absorber (43) is arranged in vertical direction.

7. The suspension system of any one of claims 1-5, wherein the third shock absorber is a dual tube hydraulic shock absorber or a spring shock absorber.

8. An electric vehicle, characterized in that it comprises a suspension system according to any one of claims 1 to 7.