CN112124059B

CN112124059B - Electric vehicle

Info

Publication number: CN112124059B
Application number: CN201910557140.1A
Authority: CN
Inventors: 李帅; 鞠健; 赵瑛; 江忠翠
Original assignee: BYD Co Ltd
Current assignee: BYD Co Ltd
Priority date: 2019-06-25
Filing date: 2019-06-25
Publication date: 2022-03-18
Anticipated expiration: 2039-06-25
Also published as: CN112124059A

Abstract

The utility model relates to an electric vehicle, this electric vehicle includes the frame, the driving motor assembly, the transaxle, indulge leaf spring and buffering support of putting, indulge leaf spring connection frame and transaxle of putting, the rear portion and the transaxle fixed connection of driving motor assembly, be provided with the buffering support between front portion and the frame, the buffering support includes horizontal leaf spring and bolster, horizontal leaf spring extends along left right direction, and both ends are used for linking to each other with the frame, the driving motor assembly links to each other with horizontal leaf spring, the bolster sets up between horizontal leaf spring and automobile body, and/or set up between horizontal leaf spring and driving motor assembly. Through increasing the suspension point on the basis of current structure, also set up the buffering support between the front portion of driving motor assembly and frame promptly, this buffering support can provide the support and the cushioning effect of power for the front portion of driving motor assembly, avoids the composition surface of driving motor assembly and axle housing to cause the accident of oil leak, fracture owing to the atress is too big.

Description

Electric vehicle

Technical Field

The present disclosure relates to the field of vehicle technology, and in particular, to an electric vehicle.

Background

In prior art, electric automobile's motor and gearbox pass through the bolt and fix with the axle housing and form motor integrated bridge together, and this integrated bridge passes through U type bolt and realizes and indulge the binding of putting the leaf spring, and the front and back both ends of indulging putting the leaf spring are fixed on the frame through the support, play the effect to the elastic buffer of axle housing.

In the process that electric automobile went on the road surface, the unevenness of road surface can arouse the vibration of tire, and then transmits the vibration to the axle housing, attenuates vibration through leaf spring then transmit to the frame on. Because be different from the axle housing of traditional vehicle, driving motor need install on the axle housing, and the in-process that vibrates takes place at the axle housing, the accident of oil leak, fracture easily takes place for axle housing and driving motor's composition surface.

Disclosure of Invention

The purpose of this disclosure is to provide an electric vehicle, this electric vehicle can avoid the emergence of the accident such as the driving motor assembly with the composition face oil leak of axle housing, fracture.

In order to achieve the above object, the present disclosure provides an electric vehicle, electric vehicle includes frame, driving motor assembly, transaxle, indulges and puts leaf spring and buffering support, indulge and put the leaf spring and connect the frame reaches the transaxle, the rear portion of driving motor assembly with transaxle fixed connection, anterior with be provided with between the frame buffering support, buffering support includes horizontal leaf spring and bolster, horizontal leaf spring extends along left right direction to both ends be used for with the frame links to each other, driving motor assembly with horizontal leaf spring links to each other, the bolster sets up horizontal leaf spring with between the frame, and/or set up horizontal leaf spring with between the driving motor assembly.

Optionally, the buffering bracket further comprises a supporting seat, two ends of the transverse leaf spring are respectively installed on the frame through the supporting seat, and the buffering member is disposed between the transverse leaf spring and the supporting seat.

Optionally, the support seat is formed into an L-shaped plate-shaped structure and includes a first panel extending in a vertical direction and a second panel extending in a horizontal direction, the first panel is used for being connected to the frame, and the second panel is provided with the buffer.

Alternatively, the buffer member is formed as a coil spring, a lower end of which is connected to the second panel through a lower cover plate, and an upper end of which is connected to an end of the transverse plate spring through an upper cover plate.

Optionally, a plurality of first reinforcing ribs are arranged on the supporting seat, the first reinforcing ribs are formed into an L-shaped structure and include a first body extending in a vertical direction and a second body extending in a horizontal direction, and the first body and the second body are respectively arranged on the outer wall of the first panel and the outer wall of the second panel.

Optionally, the buffer support still includes the mount pad that is L shape, the mount pad includes the third panel that extends along the horizontal direction and the fourth panel that extends along vertical direction, the third panel with horizontal leaf spring links to each other, the fourth panel with the driving motor assembly links to each other.

Optionally, a plurality of second reinforcing ribs are formed between the inner wall of the third panel and the inner wall of the fourth panel, the second reinforcing ribs are formed into a triangular structure, and two sides of the triangular structure are respectively connected with the third panel and the fourth panel.

Optionally, the buffer bracket is left-right symmetric about the mounting seat.

Optionally, the supporting seat is of an integrally formed structure.

The beneficial effect of this disclosure:

through increasing the suspension point on the basis of current structure, set up the buffering support also between the front portion of driving motor assembly and frame, the driving motor assembly links to each other with horizontal leaf spring, set up the bolster between horizontal leaf spring and the frame to and perhaps between horizontal leaf spring and the driving motor assembly, under the condition of road surface unevenness or braking, this buffering support can provide the support of power for the front portion of driving motor assembly, avoid the driving motor assembly to arouse the accident of oil leak, fracture because the atress is too big with the composition surface of axle housing.

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 structural view of a bumper bracket of an electric vehicle according to an alternative embodiment of the present disclosure;

FIG. 2 is a schematic view of a bumper bracket in combination with a frame of an electric vehicle according to an alternative embodiment of the present disclosure;

fig. 3 is a bottom view of a buffer bracket of an electric vehicle, which is combined with a vehicle frame, according to an alternative embodiment of the present disclosure, that is, the bottom view of fig. 2.

Description of the reference numerals

1 drive motor assembly 2 drive axle

3 longitudinally-arranged plate spring 4 buffer support

41 support seat 42 horizontal plate spring

43 cushion 411 first panel

412 second panel 5 lower cover

6 Upper cover 413 first stiffener

4131 first body 4132 second body

44 mount 441 third panel

442 fourth panel 443 second stiffener

7U-shaped bolt 8 plate spring front support

9 first upper cover plate of plate spring rear support 61

62 second upper cover plate 10 mounting cover plate

4421 mounting hole 100 vehicle frame

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, terms of orientation such as "front, rear, left, and right" are generally used to refer to front, rear, left, and right of an automobile in a normal use state, and are defined as A, B, C, D, respectively, "upper and lower" refer to upper and lower of the automobile, and are defined as E and F, specifically as shown in fig. 2, "inner and outer" refer to inner and outer of a specific structural outline, and terms such as "first" and "second" are used to distinguish one element from another, and are not sequential or important.

When the motor and the reducer are arranged and installed, the inventor of the application finds that only the rear end of the motor and the gearbox are fixedly connected with the axle housing and other installation points are not provided due to the limitation of factors such as limited installation space, and therefore, the joint surface of the motor, the gearbox and the axle housing is easy to crack and seep oil; the motor and the gearbox have a large part of dead weight, and uneven dead weight is amplified by acceleration when the road surface is uneven, so that stress on a joint surface is amplified, and a sealing structure is easy to damage;

in addition, along with the height fluctuation of the road surface, the motor and the gearbox can easily rotate the point head around the axle shaft axis of the axle shaft due to self weight, partial mass transfer exists, simple harmonic motion of suspension is damaged, and the experience feeling of customers is reduced; in addition, along with the nodding of motor and gearbox, the liquid level of gear lubricating oil in the gearbox also can change, will probably lead to the fact that need to annotate gear oil or cause the lubricated effect of gear not good.

Based on this, as shown in fig. 1 to 3, the present disclosure provides an electric vehicle, which includes a vehicle frame, a driving motor assembly 1, a driving axle 2, a longitudinally disposed plate spring 3 and a buffer bracket 4, wherein the driving motor assembly 1 may include a driving motor and a transmission case, a rear portion of the driving motor assembly 1 may be fixed on the driving axle 2 in a bolt connection manner, left and right ends of the driving axle 2 may be bound with the longitudinally disposed plate spring 3 through U-shaped bolts 7, front and rear ends of the longitudinally disposed plate spring 3 may be respectively provided with a plate spring front support 8 and a plate spring rear support 9, the longitudinally disposed plate spring 3 is fixedly mounted on a longitudinal beam of the vehicle frame 100 through the two supports, so that when a road surface has high and low undulations, a tire vibrates and transmits the vibration to the driving axle, the vibration is attenuated by the longitudinally disposed plate spring 3 connected with the driving axle 2 and then transmitted to the vehicle frame 100, the stability and the travelling comfort of driving are guaranteed, however, the quality of the driving motor assembly 1 is large, when the road surface is uneven, the driving motor assembly 1 can rock up and down under the action of gravity, and then the stress of the rear end of the driving motor assembly 1 and the joint face of the driving axle 2 is large, and the sealing structure is damaged, so that oil leakage and cracking accidents are caused.

Therefore, in the present disclosure, the buffer bracket 4 may be disposed between the front portion of the driving motor assembly 1 and the vehicle frame 100 to support and buffer the driving motor assembly 1, specifically, the buffer bracket 4 may include a horizontal plate spring 42 and a buffer member 43, the horizontal plate spring 42 may extend in the left-right direction, and both ends are used to connect with the vehicle frame 100, for example, both ends of the horizontal plate spring 42 may be connected with both longitudinal beams of the vehicle frame 100, the driving motor assembly 1 may be connected with the horizontal plate spring 42, the buffer member 43 may be disposed between the horizontal plate spring 42 and the vehicle frame 100, and/or between the horizontal plate spring 42 and the driving motor assembly 1. By adding a suspension point on the basis of the existing structure, namely arranging the buffer bracket 4 between the front part of the driving motor assembly 1 and the frame 100, under the condition of uneven road surface or braking, the buffer bracket 4 can provide force support for the front part of the driving motor assembly 1 and play a certain buffer role through the buffer piece 43 on the buffer bracket, thereby avoiding the accidents of oil leakage and cracking caused by overlarge stress on the joint surface of the driving motor assembly 1 and the drive axle 2.

Optionally, the above-mentioned horizontal plate spring 42 may be a leaf spring, and the leaf spring itself can play a certain force buffering role for the driving motor assembly 1 connected thereto as an elastic element itself, and then the buffering effect that the buffering element 43 is arranged to enable is better, so as to more effectively reduce the stress at the joint surface between the driving motor assembly 1 and the driving axle 2, and prevent the occurrence of oil leakage and cracking due to too large stress.

Specifically, as shown in fig. 1 and 3, the buffer bracket 4 may further include a support base 41, and both ends of the transverse leaf spring 42 may be respectively mounted on the frame 100 through the support base 41, thereby improving mounting stability. For example, the support base 41 may be fixed to the side member of the vehicle frame 100 by bolting, but the present disclosure is not limited to the connection method of the support base 41 and the vehicle frame 100, and the support base may be connected by a connection method such as welding. Both ends of the horizontal plate spring 42 may be connected to the supporting base 41, and the buffer member 43 may be disposed between the horizontal plate spring 42 and the supporting base 41, and the front portion of the driving motor assembly 1 may be connected to the horizontal plate spring 42, thereby providing a force support to the front portion of the driving motor assembly 1 and playing a role of buffering by the buffer member 43 thereon. For example, in the process of braking the electric vehicle, the transverse plate spring 42 and the buffer member 43 can inhibit the drive motor assembly 1 from nodding (rotating up and down) to a certain extent, so as to avoid the drive axle 2 from rotating around the axis of the half axle, reduce the stress at the joint surface of the drive motor assembly 1 and the drive axle 2, and prevent the oil leakage and cracking caused by overlarge stress; in addition, the liquid level of the lubricating oil of the gear in the gearbox can be kept relatively stable as much as possible, and the situation that the lubricating oil is filled or the lubricating oil of the internal gear is not in place is avoided.

More specifically, as shown in fig. 1, the support base 41 may be formed in an L-shaped plate-shaped structure and include a first panel 411 extending in a vertical direction and a second panel 412 extending in a horizontal direction, the first panel 411 may be used to be connected to a side member of the vehicle frame 100, a buffer 43 may be mounted on the second panel 412 to improve the compactness and rationality of installation between the structures, further, the buffer 43 may be formed as a coil spring, a lower end of the coil spring may be connected to the second panel 412 through a lower cover plate 5, as an alternative embodiment, a lower end of the coil spring may be welded and fixed to the lower cover plate 5, the lower cover plate 5 may be fixed to the second panel 412 through a bolt connection, the upper cover plate 6 may be configured as a first upper cover plate 61 and a second upper cover plate 62, an upper end of the coil spring may be fixed to a lower surface of the first upper cover plate 61 through a welding, the second upper cover plate 62 and the first upper cover plate 61 can be fixedly connected by a plurality of bolts, and the end of the transverse plate spring 42 can be arranged between the two upper cover plates 6, so that the two upper cover plates are convenient to disassemble and assemble while realizing the fixed connection. As another alternative, the buffer 43 may be formed as a rubber spring, and the disclosure does not limit the specific type of the buffer 43.

In addition, as shown in fig. 1, a plurality of first reinforcing ribs 413 may be disposed on the supporting base 41, the first reinforcing ribs 413 may be formed in an L-shaped structure and include a first body 4131 extending in a vertical direction and a second body 4132 extending in a horizontal direction, and the first body 4131 and the second body 4132 are disposed on an outer wall of the first panel 411 and an outer wall of the second panel 412, respectively, so as to improve the structural strength of the supporting base 41 and ensure the stability of the connection between the structures.

As an alternative embodiment, as shown in fig. 1, the buffer bracket 4 may further include an L-shaped mounting seat 44, the mounting seat 44 may include a third panel 441 extending in the horizontal direction and a fourth panel 442 extending in the vertical direction, the third panel 441 may be connected to the horizontal plate spring 42, the fourth panel 442 may be connected to the driving motor assembly 1, specifically, the third panel 441 may be fixedly connected to the mounting cover plate 10 by a bolt, and the bolt penetrates through the horizontal plate spring 42 to be disposed between the third panel 441 and the mounting cover plate 10, so as to achieve the purpose of stable mounting; the fourth panel 442 may have a mounting hole 4421 formed thereon, and the fourth panel 442 may be connected to the driving motor assembly 1 by inserting a bolt into the mounting hole 4421, so as to achieve the purpose of stable connection, but the present disclosure does not limit the connection manner between the third panel 441 and the horizontal plate spring 42 and the connection manner between the fourth panel 442 and the driving motor assembly 1, and may also adopt a connection manner such as welding or the like for fixed connection.

Further, as shown in fig. 1, a plurality of second reinforcing ribs 443 may be formed between the inner walls of the third and

fourth panels

441 and 442, the second reinforcing ribs 443 are formed in a triangular structure, and two sides of the triangular structure are connected to the third and

fourth panels

441 and 442, respectively, so that the structural strength of the mounting seat 44 is improved, and the mounting stability is improved.

In addition, as shown in fig. 1 and 3, the buffer bracket 4 may be bilaterally symmetric with respect to the mounting seat 44, so that stability and balance between the structures of the suspension system of the driving motor can be ensured, force distribution can be balanced, and riding comfort and stability can be improved.

Optionally, the supporting seat 41 may be formed integrally by stamping a metal plate, so that the supporting seat is convenient to form and has high structural strength.

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. An electric vehicle, characterized in that, the electric vehicle includes a frame (100), a driving motor assembly (1), a driving axle (2), a longitudinal leaf spring (3) and a buffering support (4), the longitudinal leaf spring (3) is connected with the frame (100) and the driving axle (2), the rear portion of the driving motor assembly (1) is fixedly connected with the driving axle (2), the buffering support (4) is arranged between the front portion and the frame (100), the buffering support (4) includes a transverse leaf spring (42) and a buffering member (43), the transverse leaf spring (42) extends along the left-right direction, and both ends are used for connecting with the frame (100), the driving motor assembly (1) is connected with the transverse leaf spring (42), the buffering member (43) is arranged between the transverse leaf spring (42) and the frame (100), and/or between the transverse leaf spring (42) and the drive motor assembly (1);

the buffer bracket (4) further comprises a supporting seat (41), two ends of the transverse plate spring (42) are respectively installed on the frame (100) through the supporting seat (41), and the buffer piece (43) is arranged between the transverse plate spring (42) and the supporting seat (41);

buffer bracket (4) still include be L shape mount pad (44), mount pad (44) include along the third panel (441) of horizontal direction extension and along the fourth panel (442) of vertical direction extension, third panel (441) with horizontal leaf spring (42) link to each other, fourth panel (442) with driving motor assembly (1) links to each other.

2. The electric vehicle according to claim 1, wherein the support base (41) is formed in an L-shaped plate-like structure and includes a first panel (411) extending in a vertical direction and a second panel (412) extending in a horizontal direction, the first panel (411) being adapted to be connected to the vehicle frame (100), the second panel (412) having the bumper member (43) mounted thereon.

3. An electric vehicle according to claim 2, characterized in that the buffer member (43) is formed as a coil spring, the lower end of which is connected to the second panel (412) via a lower cover plate (5), and the upper end of which is connected to the end of the transverse leaf spring (42) via an upper cover plate (6).

4. The electric vehicle according to claim 2, characterized in that a plurality of first reinforcing ribs (413) are provided on the support base (41), the first reinforcing ribs (413) are formed in an L-shaped structure and include a first body (4131) extending in a vertical direction and a second body (4132) extending in a horizontal direction, and the first body (4131) and the second body (4132) are provided at an outer wall of the first panel (411) and an outer wall of the second panel (412), respectively.

5. The electric vehicle according to claim 1, wherein a plurality of second reinforcing ribs (443) are formed between the inner wall of the third panel (441) and the inner wall of the fourth panel (442), the second reinforcing ribs (443) are formed in a triangular structure, and both sides of the triangular structure are connected to the third panel (441) and the fourth panel (442), respectively.

6. The electric vehicle according to claim 5, characterized in that the cushion bracket (4) is bilaterally symmetrical with respect to the mount (44).

7. An electric vehicle according to any of claims 1-4, characterized in that the support (41) is of one-piece construction.