CN219277167U

CN219277167U - Swing arm for electric car

Info

Publication number: CN219277167U
Application number: CN202223612635.6U
Authority: CN
Inventors: 谢酉鸣; 王洪彦; 薛丰盛; 李吉祥; 王超雄
Original assignee: NINGBO JIANXIN CHASSIS SYSTEM CO Ltd
Current assignee: NINGBO JIANXIN CHASSIS SYSTEM CO Ltd
Priority date: 2022-12-30
Filing date: 2022-12-30
Publication date: 2023-06-30
Anticipated expiration: 2032-12-30

Abstract

The utility model relates to a swing arm for an electric car, which comprises a block-shaped body transversely arranged along the front-rear direction, wherein the block-shaped body is of a hollow structure made of aluminum alloy, the front end part of the inner side of the block-shaped body is provided with a connecting front point for connecting with an auxiliary frame, the rear end part of the inner side of the block-shaped body is provided with a connecting rear point for connecting with the auxiliary frame, the front end part of the outer side of the block-shaped body is provided with a first mounting seat for mounting an H-arm connecting rod, the rear end part of the outer side of the block-shaped body is provided with a second mounting seat for mounting a steering knuckle, the first mounting seat is opposite to the connecting front point, and the second mounting seat is opposite to the connecting rear point. The utility model can meet the light-weight requirement of the trolley, is favorable for forming stable connection with the auxiliary frame, has excellent overall strength, rigidity, mode and other performances, and meets the requirement of the trolley on high performance.

Description

Swing arm for electric car

Technical Field

The utility model relates to the field of chassis parts, in particular to a swing arm for an electric car.

Background

The swing arm is an important component part of the suspension part of the chassis, and elastically connects the vehicle body with the vehicle, so as to reduce the impact caused by the ground pothole during the running of the vehicle and ensure the riding comfort. For example, chinese patent No. ZL201921591796.7 (issued to CN 211166291U) is a swing arm for an automobile, chinese patent No. ZL202021161666.2 (issued to CN 212400807U) is a swing arm assembly for a chassis suspension for an automobile, and the like.

Compared with the traditional oil truck, the electric truck is a trend of future automobile development, the traditional swing arm is generally forged by steel materials, the weight is large, the electric truck is not suitable for the requirement of light weight of the electric truck, and the rigidity and the strength are still to be further improved. In addition, the existing swing arm is generally provided with a spiral spring, and the spiral spring enables the softness and hardness of a suspension to be not adjustable, so that riding comfort and movement performance of a vehicle are affected. In addition, the existing swing arm is generally provided with two rubber bushings, so that the NVH (Noise, vibration, harshness, noise, vibration and harshness) value of the whole vehicle is poor in a low-rotation-speed state of the vehicle.

Disclosure of Invention

The first technical problem to be solved by the present utility model is to provide a swing arm for electric vehicles, which is light in weight, aiming at the prior art.

The second technical problem to be solved by the utility model is to provide a swing arm which is firmly connected with a subframe and is convenient for installing related parts.

The utility model solves at least one of the technical problems by adopting the following technical proposal: a swing arm for an electric car comprises a block-shaped body transversely arranged along the front-rear direction, and is characterized in that,

the block-shaped body is a hollow structure made of aluminum alloy, the front end part of the inner side of the block-shaped body is provided with a connecting front point used for connecting with the auxiliary frame, the rear end part is provided with a connecting rear point used for connecting with the auxiliary frame,

and the front end part of the outer side of the block body is provided with a first mounting seat for mounting the H-arm connecting rod, the rear end part is provided with a second mounting seat for mounting the knuckle, the first mounting seat is opposite to the connecting front point, and the second mounting seat is opposite to the connecting rear point.

Further, the connecting front point comprises a front connecting sleeve vertically arranged along the front-back direction, a front bushing is embedded in the front connecting sleeve,

meanwhile, the connecting rear point comprises a rear connecting sleeve vertically arranged along the front-rear direction, and a rear bushing is embedded in the rear connecting sleeve. Therefore, the structure of the front connecting point and the rear connecting point is simple, and the connection with the auxiliary frame can be better realized.

Further, the front bushing is a hydraulic bushing, and the rear bushing is a rubber bushing. Therefore, the NVH value of the whole vehicle is good at a low rotating speed, and the performance of the whole vehicle is improved.

Further, the upper surface of the outer side in the rear end of the block-shaped body is recessed downward to form a mounting point for mounting the air spring, the mounting point being adjacent to the second mounting seat. Compared with the traditional spiral spring, the air spring can enable the hardness of the suspension to be adjustable, so that the riding comfort and the movement performance of the vehicle are improved.

Further, the rear end of the mounting point protrudes outwards from the block-shaped body, and a third mounting seat for mounting the stabilizer bar connecting rod is arranged on the outer side face of the protruding part. Thereby being convenient for realizing the installation of the stabilizer bar connecting rod on the swing arm.

Further, the upper surface of the middle outer side of the front end of the block-shaped body is recessed downwards to form a avoidance groove for avoiding the shock absorber. Therefore, the avoidance of the shock absorber can be realized through the avoidance groove.

Further, the included angle formed by the front connection point and the rear connection point is larger than the included angle formed by the first installation seat and the second installation seat. Thereby the mode performance of the swing arm can be further improved.

Further, the wall thickness of the block-shaped body is 3.5mm or less. Therefore, the weight of the swing arm can be reduced to the greatest extent, and the requirement of light weight of the trolley is better met.

Further, the block-shaped body is of a hollow structure which is cast by hollow low pressure. Compared with the traditional forging mode, the hollow low-pressure casting mode can further improve the rigidity and strength of the swing arm.

Compared with the prior art, the utility model has the advantages that: the swing arm adopts a hollow structure made of aluminum alloy, so that the weight of the swing arm is lighter (about 1kg less than that of a common H-shaped swing arm), and the requirement of light weight of an electric car is met. The inner side is respectively provided with a front connecting point and a rear connecting point, which are favorable for forming stable connection with the auxiliary frame, and the outer side is respectively provided with a first mounting seat for mounting the H-arm connecting rod and a second mounting seat for mounting the knuckle, wherein the first mounting seat is opposite to the front connecting point, and the second mounting seat is opposite to the rear connecting point, so that the H-arm connecting rod and the knuckle are convenient to mount, and meanwhile, the swing arm has excellent overall strength, rigidity, modal and other performances, and the requirements of an electric car on high performance are met.

Drawings

FIG. 1 is a schematic diagram of a swing arm according to an embodiment of the present utility model;

FIG. 2 is a schematic view of the structure of FIG. 1 in another direction;

fig. 3 is a partially exploded view of a swing arm according to an embodiment of the present utility model.

Detailed Description

The utility model is described in further detail below with reference to the embodiments of the drawings.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for purposes of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and because the disclosed embodiments of the present utility model may be arranged in different orientations, these directional terms are merely for illustration and should not be construed as limitations, such as "upper", "lower" are not necessarily limited to orientations opposite or coincident with the direction of gravity. Furthermore, features defining "first", "second" may include one or more such features, either explicitly or implicitly.

As shown in fig. 1 to 3, a swing arm of an electric car, which is specifically an H-shaped swing arm, includes a block-shaped body 1 disposed laterally in the front-rear direction. The block body 1 is a hollow structure made of aluminum alloy, a front end part of the inner side of the block body 1 is provided with a front connection point 2 for being connected with the auxiliary frame, and a rear connection point 3 for being connected with the auxiliary frame is arranged at the rear end part of the inner side of the block body. The front end of the block body 1 is provided with a first mount 4 for mounting the H-arm link, the rear end is provided with a second mount 5 for mounting the knuckle, the first mount 4 is opposite to the connection front point 2, and the second mount 5 is opposite to the connection rear point 3.

The utility model adopts a hollow structure made of aluminum alloy material, so that the weight of the swing arm is lighter (about 1kg less than that of a common H-shaped swing arm), and the requirement of light weight of an electric car is met. The inner side is respectively provided with a front connection point 2 and a rear connection point 3, which are favorable for the swing arm and the auxiliary frame to form stable connection, and simultaneously, the outer side is respectively provided with a first mounting seat 4 for mounting the H-arm connecting rod and a second mounting seat 5 for mounting the knuckle, the first mounting seat 4 is opposite to the front connection point 2, the second mounting seat 5 is opposite to the rear connection point 3, so that the swing arm has excellent overall strength, rigidity, modal and other performances while being convenient for the mounting of the H-arm connecting rod and the knuckle, and the requirements of an electric car on high performance are met.

Preferably, in this embodiment, the block body 1 is a hollow structure formed by hollow low-pressure casting, and compared with the conventional forging method, the rigidity and strength of the swing arm can be further improved by adopting the hollow low-pressure casting method. And the wall thickness of the block-shaped body 1 is less than or equal to 3.5mm, so that the weight of the swing arm can be reduced to the greatest extent, and the requirement of light weight of an electric car can be better met.

Further, the connection front point 2 includes a front connection sleeve 21 vertically arranged in the front-rear direction, and a front bush 22 is fitted in the front connection sleeve 21. Meanwhile, the above-mentioned connection rear point 3 includes a rear connection sleeve 31 vertically disposed in the front-rear direction, and a rear bushing 32 is fitted in the rear connection sleeve 31. Therefore, the structure of the front connecting point 2 and the rear connecting point 3 is simple, and the connection with the auxiliary frame can be better realized. Preferably, in the present embodiment, the front bushing 22 is a hydraulic bushing, and the rear bushing 32 is a rubber bushing. Therefore, the NVH value of the whole vehicle is good at a low rotating speed, and the performance of the whole vehicle is improved.

Further, the upper surface of the outer side in the rear end of the block body 1 is recessed downward to form a mounting point 7 for mounting an air spring, and the mounting point 7 is adjacent to the second mounting seat 5. Compared with the traditional spiral spring, the air spring can enable the hardness of the suspension to be adjustable, so that the riding comfort and the movement performance of the vehicle are improved. In addition, the rear end of the mounting point 7 protrudes out of the block body 1, and a third mounting seat 6 for mounting a stabilizer bar link is provided on the outer side surface of the protruding portion. Thereby being convenient for realizing the installation of the stabilizer bar connecting rod on the swing arm.

Further, in this embodiment, the upper surface of the middle outer side of the front end of the block body 1 is recessed downward to form a avoidance groove 8 for avoiding the shock absorber, so that the avoidance of the shock absorber can be achieved through the avoidance groove 8. In addition, the included angle formed by the front connection point 2 and the rear connection point 3 is larger than the included angle formed by the first mounting seat 4 and the second mounting seat 5, so that the modal performance of the swing arm can be further improved.

Claims

1. Swing arm for electric vehicles, comprising a block-shaped body (1) arranged transversely in the fore-and-aft direction, characterized in that,

the block body (1) is a hollow structure made of aluminum alloy, the front end part of the inner side of the block body (1) is provided with a connecting front point (2) for connecting with the auxiliary frame, the rear end part is provided with a connecting rear point (3) for connecting with the auxiliary frame,

and, the front end of the outer side of the block body (1) is provided with a first mounting seat (4) for mounting the H-arm connecting rod, the rear end is provided with a second mounting seat (5) for mounting the knuckle, the first mounting seat (4) is opposite to the connecting front point (2), and the second mounting seat (5) is opposite to the connecting rear point (3).

2. Swing arm for electric vehicles according to claim 1, characterized in that the connecting front point (2) comprises a front connecting sleeve (21) arranged vertically in the front-rear direction, which front connecting sleeve (21) is embedded with a front bushing (22),

meanwhile, the connecting rear point (3) comprises a rear connecting sleeve (31) vertically arranged along the front-rear direction, and a rear bushing (32) is embedded in the rear connecting sleeve (31).

3. Swing arm for electric vehicles according to claim 2, characterized in that the front bushing (22) is a hydraulic bushing and the rear bushing (32) is a rubber bushing.

4. A swing arm for electric vehicles according to any one of claims 1 to 3, characterized in that the upper surface of the outer side in the rear end of said block-shaped body (1) is recessed downward to form a mounting point (7) for mounting an air spring, the mounting point (7) being adjacent to said second mounting seat (5).

5. Swing arm for electric vehicles according to claim 4, characterized in that the rear end of the mounting point (7) protrudes outwards from the block-shaped body (1), and that the outer side of the protruding part is provided with a third mounting seat (6) for mounting a stabilizer bar link.

6. A swing arm for electric vehicles according to any one of claims 1 to 3, characterized in that the upper surface of the middle outer side of the front end of the block-shaped body (1) is recessed downward to form a clearance groove (8) for avoiding the shock absorber.

7. A swing arm for electric vehicles according to any one of claims 1-3, characterized in that the angle between the front point of connection (2) and the rear point of connection (3) is greater than the angle between the first mounting seat (4) and the second mounting seat (5).

8. A swing arm for electric vehicles according to any one of claims 1 to 3, characterized in that the wall thickness of the block-shaped body (1) is less than or equal to 3.5mm.

9. A swing arm for electric vehicles according to any one of claims 1 to 3, characterized in that said block-shaped body (1) is of hollow structure, cast at low pressure.