阅读说明：本技术 一种汽车后悬架系统及汽车 (Automobile rear suspension system and automobile ) 是由 郭超 彭亚琪 涂大鹏 钟家球 于 2020-06-01 设计创作，主要内容包括：本发明属于汽车技术领域,特别是涉及一种汽车后悬架系统及汽车。该汽车后悬架系统包括后轴节总成、后下摆臂总成、后减振器总成、后上摆臂总成、后前束臂总成以及后纵臂总成；后下摆臂总成、后上摆臂总成、后前束臂总成以及后纵臂总成均连接后轴节总成；后上摆臂总成上设有通孔,后减振器总成穿过通孔连接在后轴节总成上,后下摆臂总成、后上摆臂总成、后前束臂总成、后纵臂总成以及后减振器总成远离后轴节总成的一端均连接汽车车身。本发明的汽车后悬架系统降低了后减振器总成的安装高度,改善了汽车乘员舱的乘坐空间,提高了整车的舒适性。(The invention belongs to the technical field of automobiles, and particularly relates to an automobile rear suspension system and an automobile. The automobile rear suspension system comprises a rear shaft coupling assembly, a rear lower swing arm assembly, a rear shock absorber assembly, a rear upper swing arm assembly, a rear front beam arm assembly and a rear longitudinal arm assembly; the rear lower swing arm assembly, the rear upper swing arm assembly, the rear front beam arm assembly and the rear longitudinal arm assembly are all connected with the rear shaft coupling assembly; the rear upper swing arm assembly is provided with a through hole, the rear shock absorber assembly penetrates through the through hole to be connected to the rear shaft coupling assembly, and the ends, far away from the rear shaft coupling assembly, of the rear lower swing arm assembly, the rear upper swing arm assembly, the rear front beam arm assembly, the rear longitudinal arm assembly and the rear shock absorber assembly are connected with an automobile body. The automobile rear suspension system reduces the installation height of the rear shock absorber assembly, improves the riding space of an automobile passenger compartment, and improves the comfort of the whole automobile.)

1. An automobile rear suspension system comprises a rear shaft coupling assembly, a rear lower swing arm assembly, a rear shock absorber assembly, a rear upper swing arm assembly, a rear front beam arm assembly and a rear longitudinal arm assembly; the rear lower swing arm assembly, the rear upper swing arm assembly, the rear front beam arm assembly and the rear longitudinal arm assembly are all connected with the rear shaft coupling assembly; the automobile rear upper swing arm assembly is characterized in that a through hole is formed in the rear upper swing arm assembly, the rear shock absorber assembly penetrates through the through hole to be connected to the rear shaft joint assembly, and the rear lower swing arm assembly, the rear upper swing arm assembly, the rear front beam arm assembly, the rear longitudinal arm assembly and one end, far away from the rear shaft joint assembly, of the rear shock absorber assembly are connected with an automobile body.

2. The rear suspension system of claim 1, wherein the rear upper swing arm assembly and the rear toe arm assembly are disposed in a same vertical plane.

3. The rear suspension system of claim 1, wherein the central axis of the rear shock absorber assembly is perpendicular to the horizontal plane.

4. The automotive rear suspension system of claim 1, wherein the first mounting point of the rear shock absorber assembly on the rear axle knuckle assembly is located between the second mounting point and the third mounting point in the vertical direction; the second mounting point is a mounting point of the rear upper swing arm assembly on the rear shaft coupling assembly; the third mounting point is a mounting point of the rear toe arm assembly on the rear shaft joint assembly.

5. The rear suspension system of claim 1, wherein the rear upper swing arm assembly, the rear toe arm assembly, and the rear shock absorber assembly are each connected to the rear boss assembly by a bushing; the rear lower swing arm assembly is connected with the rear shaft joint assembly through a ball pin; the rear longitudinal arm assembly is connected with the rear shaft coupling assembly through a bolt.

6. The automotive rear suspension system according to any one of claims 1 to 5, further comprising a rear stabilizer bar assembly; and one end of the rear stabilizer bar assembly is connected with the rear lower swing arm assembly, and the other end of the rear stabilizer bar assembly is connected with the automobile body.

7. The automotive rear suspension system of claim 6, wherein the rear stabilizer bar assembly includes a roll ball pin, a stabilizer bar tie rod, and a stabilizer bar connected to the stabilizer bar tie rod; and a connecting piece is arranged on the rear lower swing arm assembly, the stabilizer bar pull rod is rotatably connected with the connecting piece through the rotating ball pin, and one end of the stabilizer bar, which is far away from the stabilizer bar pull rod, is connected with the automobile body.

8. The rear suspension system of claim 6, wherein the rear suspension assembly further comprises a rear spring assembly, and the rear lower swing arm assembly is provided with a mounting groove; and one end of the rear spring assembly is arranged in the mounting groove, and the other end of the rear spring assembly is connected with the automobile body.

9. The rear suspension system of claim 8, wherein the mounting slot is located between the first and second attachment points in a lateral direction; the first connecting point is a connecting point of the rear shaft coupling assembly and the rear lower swing arm assembly; the second connection point is a connection point of the rear stabilizer bar assembly and the rear lower swing arm assembly.

10. An automobile comprising the automobile rear suspension system according to any one of claims 1 to 9.

Technical Field

The invention belongs to the technical field of automobiles, and particularly relates to an automobile rear suspension system and an automobile.

Background

The rear suspension system of an automobile is an important component in the chassis of the automobile. The rear suspension system of the automobile not only affects the stability and smoothness of an automobile chassis, but also affects the structure of the automobile, and further affects the space size of an automobile passenger compartment.

In the prior art, due to the limitation of the mounting space inside and outside the suspension, the height of the mounting point of the rear shock absorber assembly is difficult to reduce, so that the riding space of a passenger compartment of an automobile is small, the angle of the arrangement of the rear shock absorber assembly is inclined, the attenuation capacity of the rear suspension system of the automobile to road surface vibration is reduced, and the comfort of the whole automobile is further influenced. In addition, the rear upper swing arm assembly in the automobile rear suspension system in the prior art is generally arranged right above the wheel center of the rear wheel of the automobile, so that the arrangement of other parts of the four-wheel drive automobile is influenced, the improvement of the toe-in of the lateral force of the rear suspension is not facilitated, and the improvement of the response of a rear shaft is not facilitated.

Disclosure of Invention

The invention solves the technical problems that the passenger compartment of an automobile rear suspension system in the prior art is narrow in riding space, the whole automobile is low in comfort and the like, and provides the automobile rear suspension system and the automobile.

In view of the above problems, an embodiment of the present invention provides an automobile rear suspension system, which includes a rear axle coupling assembly, a rear lower swing arm assembly, a rear shock absorber assembly, a rear upper swing arm assembly, a rear toe arm assembly, and a rear trailing arm assembly; the rear lower swing arm assembly, the rear upper swing arm assembly, the rear front beam arm assembly and the rear longitudinal arm assembly are all connected with the rear shaft coupling assembly; the rear upper swing arm assembly is provided with a through hole, the rear shock absorber assembly penetrates through the through hole to be connected to the rear shaft joint assembly, and the rear lower swing arm assembly, the rear upper swing arm assembly, the rear front beam arm assembly, the rear longitudinal arm assembly and one end, far away from the rear shaft joint assembly, of the rear shock absorber assembly are connected with an automobile body.

Optionally, the rear upper swing arm assembly and the rear toe arm assembly are arranged in the same vertical plane.

Optionally, the central axis of the rear shock absorber assembly is perpendicular to the horizontal plane.

Optionally, the first mounting point of the rear shock absorber assembly on the rear axle joint assembly is located between the second mounting point and the third mounting point in the vertical direction; the second mounting point is a mounting point of the rear upper swing arm assembly on the rear shaft coupling assembly; the third mounting point is a mounting point of the rear toe arm assembly on the rear shaft joint assembly.

Optionally, the rear upper swing arm assembly, the rear toe arm assembly and the rear shock absorber assembly are all connected with the rear shaft coupling assembly through bushings; the rear lower swing arm assembly is connected with the rear shaft joint assembly through a ball pin; the rear longitudinal arm assembly is connected with the rear shaft coupling assembly through a bolt.

Optionally, the automotive rear suspension system further comprises a rear stabilizer bar assembly; and one end of the rear stabilizer bar assembly is connected with the rear lower swing arm assembly, and the other end of the rear stabilizer bar assembly is connected with the automobile body.

Optionally, the rear stabilizer bar assembly includes a rotating ball pin, a stabilizer bar pull rod, and a stabilizer bar connected to the stabilizer bar pull rod; and a connecting piece is arranged on the rear lower swing arm assembly, the stabilizer bar pull rod is rotatably connected with the connecting piece through the rotating ball pin, and one end of the stabilizer bar, which is far away from the stabilizer bar pull rod, is connected with the automobile body.

Optionally, the automobile rear suspension assembly further comprises a rear spring assembly, and a mounting groove is formed in the rear lower swing arm assembly; and one end of the rear spring assembly is arranged in the mounting groove, and the other end of the rear spring assembly is connected with the automobile body.

Optionally, in a lateral direction, the mounting slot is located between the first connection point and the second connection point; the first connecting point is a connecting point of the rear shaft coupling assembly and the rear lower swing arm assembly; the second connection point is a connection point of the rear stabilizer bar assembly and the rear lower swing arm assembly.

According to the invention, the rear upper swing arm assembly is provided with the through hole, and the rear shock absorber assembly penetrates through the through hole to be connected with the rear shaft coupling assembly, so that the mounting height of the rear shock absorber assembly is greatly reduced, the riding space of a passenger compartment of an automobile is improved, and the comfort of the whole automobile is further improved.

The invention further provides an automobile which comprises the automobile rear suspension system.

Drawings

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is a schematic structural diagram of a rear suspension system of an automobile according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a rear suspension system of an automobile according to another embodiment of the present invention;

FIG. 3 is a top view of an automotive rear suspension system in accordance with one embodiment of the present invention;

FIG. 4 is a schematic diagram illustrating lateral forces experienced by the rear wheel when the rear upper swing arm assembly is not being moved forward according to an embodiment of the present invention;

FIG. 5 is a schematic diagram illustrating the lateral forces experienced by the rear wheel as the rear upper swing arm assembly is moved forward according to one embodiment of the present invention;

fig. 6 is a schematic view of a rear wheel toe-in according to an embodiment of the present invention.

The reference numerals in the specification are as follows:

1. a rear hub assembly; 2. a rear lower swing arm assembly; 21. mounting grooves; 22. a connecting member; 3. a rear shock absorber assembly; 4. a rear upper swing arm assembly; 41. a through hole; 5. a rear toe arm assembly; 6. a rear trailing arm assembly; 7. a rear stabilizer bar assembly; 71. rotating the ball pin; 72. a stabilizer bar pull rod; 73. a stabilizer bar; 8. a rear spring assembly; 9. a rear wheel; A. a first mounting point; B. a second mounting point; C. a third mounting point; D. a first connection point; E. a second connection point.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

It is to be understood that the terms "upper", "lower", "left", "right", "front", "rear", "middle", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the invention, in order to better show the structure and the connection relationship of the rear suspension system of the automobile, the front direction referred to in the invention is the direction actually pointing to the head of the automobile (namely, the right direction of the rear suspension system of the automobile shown in fig. 2); the "rear" referred to herein is the direction that actually points toward the rear of the vehicle (i.e., to the left of the rear suspension system of the vehicle shown in FIG. 2); the "up" in the sense of the present invention is the direction that actually points toward the roof of the vehicle (i.e., above the rear suspension system of the vehicle shown in FIG. 2); the lower part of the invention refers to the direction which is actually pointed to the bottom of the vehicle (namely the lower part of the rear suspension system of the vehicle shown in figure 2); the longitudinal direction referred to in the invention is the front-back direction of the automobile (namely the length direction of the automobile); the lateral direction in the invention is the left and right direction of the automobile (namely the width direction of the automobile); the vertical direction in the present invention is the up-down direction of the automobile (i.e. the height direction of the automobile)

As shown in fig. 1 to 3, an automobile rear suspension system according to an embodiment of the present invention includes a rear axle coupling assembly 1, a rear lower swing arm assembly 2, a rear shock absorber assembly 3, a rear upper swing arm assembly 4, a rear toe arm assembly 5, and a rear trailing arm assembly 6; the rear lower swing arm assembly 2, the rear upper swing arm assembly 4, the rear toe arm assembly 5 and the rear trailing arm assembly 6 are all connected with the rear shaft coupling assembly 1; the rear upper swing arm assembly 4 is provided with a through hole 41, the rear shock absorber assembly 3 penetrates through the through hole 41 and is connected to the rear shaft coupling assembly 1, and the rear lower swing arm assembly 2, the rear upper swing arm assembly 4, the rear front beam arm assembly 5, the rear trailing arm assembly 6 and one end of the rear shock absorber assembly 3, which is far away from the rear shaft coupling assembly 1, are all connected with an automobile body (not shown). Specifically, one end of the rear lower swing arm assembly 2, the rear upper swing arm assembly 4 and one end of the rear toe arm assembly 5, which is far away from the rear shaft joint assembly 1, are connected with an auxiliary frame of the automobile body.

In the embodiment, the rear axle coupling assembly 1 is used as an important part for connecting a suspension rod system and a wheel assembly, and a casting process is adopted; the rear upper swing arm assembly 4 is made of an aluminum alloy material; the rear lower swing arm assembly 2 is a sheet metal stamping welding part and provides support for the rear spring assembly 8; the rear longitudinal arm assembly 6 adopts a sheet metal stamping part and bears longitudinal force; the rear front beam arm assembly 5 adopts a two-force rod structure, and is simple in shape and structure. The automobile rear suspension system can realize the functions of bearing, guiding, buffering and the like.

In the invention, the through hole 41 is arranged on the rear upper swing arm assembly 4, and the rear shock absorber assembly 3 penetrates through the through hole 41 to be connected with the rear shaft coupling assembly 1, so that the mounting height of the rear shock absorber assembly 3 is greatly reduced, the riding space of a passenger compartment of an automobile is improved, and the comfort of the whole automobile is further improved.

In one embodiment, as shown in fig. 1 to 3, the rear upper swing arm assembly 4 and the rear toe arm assembly 5 are arranged in the same vertical plane. It will be understood that, when the rear suspension system of the automobile is installed in the automobile, the rear upper swing arm assembly 4 and the rear front beam arm assembly 5 are arranged in the same vertical plane in the length direction of the automobile (i.e., in the longitudinal direction of the automobile).

Specifically, when the rear suspension system of the automobile is designed, in order to ensure the steering stability of the vehicle, when a lateral force is generally required, the toe-in of the rear wheel of the automobile tends to increase through the deformation of the bushings of the swing arms (including the rear upper swing arm assembly 4, the rear lower swing arm assembly 2, the rear toe-in arm assembly 5, and the like) (the rear upper swing arm assembly 4, the rear toe-in arm assembly 5, and the rear lower swing arm assembly 2 are all connected with the rear axle joint assembly 1 through the bushings). As shown in fig. 4 and 6, when the rear wheel 9 is subjected to a lateral force, if the rear upper swing arm assembly 4 is arranged at a middle position (i.e., a position between the rear toe arm assembly 5 and the rear lower swing arm assembly 2 in the longitudinal direction), the lateral force transmitted from the rear wheel 9 to the rear suspension system of the automobile is mainly borne by the rear lower swing arm assembly 2 and the rear upper swing arm assembly 4, the lateral force borne by the rear toe arm assembly 5 is small, so that the bush of the rear toe arm assembly 5 is deformed little, and the toe β of the rear wheel 9 of the automobile is caused to change little; as shown in fig. 5 and 6, if the rear upper swing arm assembly 4 is placed in front (that is, the rear upper swing arm assembly 4 and the rear toe arm assembly 5 are arranged in the same vertical plane, that is, the rear upper swing arm assembly 4 is moved forward in the longitudinal direction), the distribution of the stress state of each swing arm is changed, so that the bushing of the rear toe arm assembly 5 deforms greatly, and the lateral force toe β is increased. The lateral force toe-in beta is increased, which is equivalent to increasing the equivalent slip angle of the rear wheel 9, so that larger lateral force can be generated, the response time of the rear axle is also reduced, and the response and the following performance of the rear axle are improved.

For four-wheel drive and rear drive vehicles, a driving shaft is arranged at the wheel center position of a rear wheel 9, if the rear upper swing arm assembly 4 is arranged at the wheel center position (namely, arranged above the wheel center of a rear wheel of an automobile), the lower part of the rear upper swing arm assembly 4 needs to avoid the enveloping space of the driving shaft, and the upper part needs to avoid a vehicle body longitudinal beam, so that the design is difficult, the rear upper swing arm assembly 4 is moved forwards to be not positioned above the wheel center of the rear wheel 9 of the automobile, the constraint of the driving shaft can be avoided under the condition that the arrangement of other parts of a rear suspension system of the four-wheel drive vehicle is not influenced, and the design margin is larger.

In summary, by arranging the rear upper swing arm assembly 4 and the rear toe-in arm assembly 5 in the same vertical plane (that is, by moving the rear upper swing arm assembly 4 forward), the change of the toe-in of the wheels when the automobile rear suspension system is subjected to lateral force is greatly improved, the building capability of the lateral force of the rear axle is improved, the response and the following performance of the rear axle are improved, the envelope space of the rear drive axle of the automobile can be avoided, and the arrangement of a four-wheel drive automobile is facilitated.

In one embodiment, as shown in fig. 1-3, the central axis of the rear shock absorber assembly 3 is perpendicular to the horizontal plane. Understandably, the arrangement that the axis of the rear shock absorber assembly 3 is perpendicular to the horizontal plane can improve the damping efficiency of the rear shock absorber assembly 3, so that the rear shock absorber assembly 3 can better damp the vibration of the road surface, and the comfort of the whole vehicle is improved.

In one embodiment, as shown in fig. 1, in the vertical direction, the first mounting point a of the rear shock absorber assembly 3 on the rear boss assembly 1 is located between the second mounting point B and the third mounting point C; the second mounting point B is a mounting point of the rear upper swing arm assembly 4 on the rear shaft coupling assembly 1; the third mounting point C is a mounting point of the rear toe arm assembly 5 on the rear axle joint assembly 1. It can be understood that the first mounting point a of the rear shock absorber assembly 3 on the rear shaft joint assembly 1 is located between the second mounting point B of the rear upper swing arm assembly 4 on the rear shaft joint assembly 1 and the third mounting point C of the rear toe arm assembly 5 on the rear shaft joint assembly 1.

Preferably, in the vertical direction of the automobile, the first mounting point a, the second mounting point B and the third mounting point C are almost in the same plane, so that the structure of the automobile rear suspension system is more compact; in the vertical of car, first mounting point A the second mounting point B with the position of the three mounting point of third mounting point C can be set for according to actual demand, thereby need not reserve on the lower swing arm assembly 2 of back the installation space of back shock absorber assembly 3 has reduced this automobile rear suspension system in the shared space of side direction, is being close to one side of the sub vehicle frame of car the lower swing arm assembly 2 of back has just avoided the mounted position of third row seat, and then the space of saving can be used for increasing passenger storehouse space, has improved the travelling comfort of whole car.

In one embodiment, the rear upper swing arm assembly 4, the rear toe arm assembly 5 and the rear shock absorber assembly 3 are all connected to the rear shaft joint assembly 1 through bushings; the rear lower swing arm assembly 2 is connected with the rear shaft joint assembly 1 through a ball pin; and the rear trailing arm assembly 6 is connected with the rear shaft coupling assembly 1 through a bolt. As can be understood, the ends of the rear upper swing arm assembly 4, the rear lower swing arm assembly 2 and the rear toe arm assembly 5 away from the rear axle joint assembly 1 are all connected with the subframe through bushings; one end of the rear shock absorber assembly 3, which is far away from the rear shaft joint assembly 1, is connected with the automobile body through a bolt; and one end of the rear trailing arm assembly 6, which is far away from the rear shaft joint assembly 1, is connected with the automobile body through a bushing. The automobile rear suspension system in the embodiment can support the automobile body and bear the vertical, lateral and longitudinal forces from the road surface through the connection relation.

In one embodiment, as shown in fig. 1 to 3, the rear suspension system of the automobile further includes a rear stabilizer bar assembly 7; one end of the rear stabilizer bar assembly 7 is connected with the rear lower swing arm assembly 2 (connected through a bushing), and the other end of the rear stabilizer bar assembly 7 is connected with the automobile body (connected through a bushing). Preferably, the rear stabilizer assembly 7 includes a rotation ball pin 71, a stabilizer link 72, and a stabilizer 73 connected to the stabilizer link 72; the rear lower swing arm assembly 2 is provided with a connecting piece 22, the stabilizer bar pull rod 72 is rotatably connected with the connecting piece 22 through the rotating ball pin 71, and one end of the stabilizer bar 73, which is far away from the stabilizer bar pull rod 72, is connected with the automobile body. Specifically, one end of the stabilizer bar 73, which is far away from the stabilizer bar pull rod 72, is connected with a subframe of the automobile body; through the design of the rear stabilizer bar assembly 7, the stability of the automobile rear suspension system is improved.

In an embodiment, as shown in fig. 1 to 3, the rear suspension assembly of the automobile further includes a rear spring assembly 8, and the rear lower swing arm assembly 2 is provided with a mounting groove 21; one end of the rear spring assembly 8 is installed in the installation groove 21, and the other end of the rear spring assembly 8 is connected with the automobile body. It can be understood that the rear spring assembly 8 is disposed on the rear suspension system of the automobile separately from the rear shock absorber assembly 3, the rear shock absorber assembly 3 is disposed on the rear axle joint assembly 1, and the rear spring assembly 8 is disposed on the rear lower swing arm assembly 2, so that the rear suspension system of the automobile bears the vibration from the automobile wheels through two different portions (i.e., the rear axle joint assembly 1 and the rear lower swing arm assembly 2), thereby reducing the requirement on the strength of the rear suspension system of the automobile and facilitating the lightweight design of the automobile.

In one embodiment, as shown in fig. 3, the mounting groove 21 is located between the first connection point D and the second connection point E; the first connecting point D is a connecting point of the rear shaft coupling assembly 1 and the rear lower swing arm assembly 2; the second connection point E is a connection point of the rear stabilizer bar assembly 7 and the rear lower swing arm assembly 2. It is understood that, in the vehicle lateral direction, the first connection point D, the mounting groove 21 and the second connection point E are distributed on the rear lower swing arm assembly 2 in sequence. Preferably, the first connection point D, the mounting groove 21 and the second connection point E are almost in the same plane in the lateral direction of the vehicle, so that the structure of the rear suspension system of the vehicle is more compact. Through will back spring assembly 8 is installed on the back lower swing arm assembly 2, back spring assembly 8 can play the support automobile body, cushion the car and assault to and with the effort transmission of automobile body to the effect on the lower swing arm assembly 2.

The invention further provides an automobile comprising the automobile rear suspension system.

The present invention is not limited to the above preferred embodiments, and any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.