CN111232055A

CN111232055A - Electric motor car suspension arrangement structure

Info

Publication number: CN111232055A
Application number: CN201911082988.XA
Authority: CN
Inventors: 李建华; 孙伟; 陈双增; 姚占
Original assignee: Zhejiang Leapmotor Technology Co Ltd
Current assignee: Zhejiang Zero Run Technology Co Ltd
Priority date: 2019-11-07
Filing date: 2019-11-07
Publication date: 2020-06-05
Anticipated expiration: 2039-11-07
Also published as: CN111232055B

Abstract

The invention discloses a suspension arrangement structure of an electric vehicle, which comprises an auxiliary frame, a power assembly and a suspension frame positioned between the auxiliary frame and the power assembly, wherein a support structure is arranged on the auxiliary frame, a bolt structure for damping is arranged between the support structure and the suspension frame, and the suspension frame is detachably and fixedly connected with the power assembly.

Description

Electric motor car suspension arrangement structure

Technical Field

The invention relates to the technical field of auxiliary frames, in particular to a suspension arrangement structure of an electric vehicle.

Background

Most of the existing electric vehicles come by changing hair (changing oil into electricity), and the vehicle body and the chassis are all of the following structures, which causes the difficult problems of poor arrangement of a suspension system, uneven stress, insufficient limit and the like, for example, a suspension system of an electric vehicle front subframe and an electric vehicle disclosed in Chinese patent literature, the publication No. CN105480301A comprises a first cross beam, a second cross beam, a first longitudinal beam and a second longitudinal beam, wherein the first cross beam, the first longitudinal beam, the second cross beam and the second longitudinal beam are sequentially connected to form a frame structure, the first cross beam has a cross-sectional shape with a wide middle part and two narrow ends, the upper surface of the middle part of the first cross beam forms a suspension mounting surface capable of meeting the mounting requirements of two suspensions, a first suspension mounting bracket is arranged at the position where the first cross beam is adjacent to the first cross beam, a second suspension mounting bracket is arranged at the position where the second longitudinal beam is adjacent to the first cross beam, and a third suspension mounting bracket is arranged at the position where the second cross beam is adjacent to the first longitudinal, and a fourth suspension mounting bracket is arranged at the position where the second cross beam is adjacent to the second longitudinal beam. This scheme is through support rigid connection between power assembly and the sub vehicle frame, and when following current sub vehicle frame and power assembly selected and with both assembles according to technical need, can cause the vibration of sub vehicle frame directly to pass to power assembly, or power assembly's vibration directly transmits to sub vehicle frame, causes the tremble of vehicle.

Disclosure of Invention

The invention provides a suspension arrangement structure of an electric vehicle, aiming at overcoming the problem of rigid connection between the conventional power assembly and an auxiliary frame through a bracket, and the suspension arrangement structure can block the vibration transmission between the auxiliary frame and the power assembly so as to ensure the stability of the states of the auxiliary frame and the power assembly.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides an electric motor car suspension arrangement structure, includes sub vehicle frame, power assembly and is located the suspension frame between sub vehicle frame and the power assembly, be equipped with supporting structure on the sub vehicle frame, be equipped with between supporting structure and the suspension frame and be used for absorbing bolt structure, can dismantle fixed connection between suspension frame and the power assembly. Most of the existing electric vehicles are driven by changing hair (changing oil into electricity), and the vehicle body and the chassis are of continuous structures, so that the problems of poor arrangement of a suspension system, uneven stress, insufficient limit and the like are difficult to solve. This scheme is to above problem, through the setting of suspension on the basis of current sub vehicle frame, with the powertrain suspension in sub vehicle frame for the powertrain when output state, its vibrations transmit to sub vehicle frame, thereby arouse sub vehicle frame resonance, and when the vehicle received external force influence, the vibrations transmission of sub vehicle frame was to powertrain department, led to the fact the influence to the powertrain. The effect of supporting structure supports the suspension, through set up supporting structure on current sub vehicle frame, provide the impetus for the suspension, thereby be convenient for arrange the suspension according to power assembly's size and atress requirement, be connected through the bolted construction who has the shock attenuation effect between supporting structure and the suspension, this bolted construction effect is the weight of the power assembly that the transmission suspension loaded, make simultaneously not have rigid connection between power assembly and the sub vehicle frame, the two-way transmission of vibration between power assembly and sub vehicle frame has been avoided.

Preferably, the subframe comprises a first plate, a second plate, a third plate and a fourth plate, wherein two support structures are arranged on the first plate, and one support structure is arranged on the third plate. One end and the second plate welding of first plate, the other end and the welding of fourth plate, the both ends of third plate weld with the other end of second plate, fourth plate respectively, and four plates enclose to close and form frame type structure, play the guard action to the power assembly. Two supporting structures on the first plate and a supporting structure on the third plate are respectively connected with a suspension frame, a triangle is formed by enclosing fixing points between the three suspension frames and the power assembly, the center of the triangle coincides with the gravity center of the power assembly, so that the weight of the power assembly can be uniformly shared by the three suspension frames, when the power assembly is in a large-torque output state, the reaction force of the torque force of the power assembly is uniformly transmitted to the three suspension frames, the situation that the power assembly is displaced due to the reaction force of the torque force is avoided, and the structural stability of the auxiliary frame is damaged.

Preferably, the suspension frame comprises a first frame body and a second frame body, one end of the first frame body, which is close to the auxiliary frame, is connected with the support through a shaft body, one end of the second frame body, which is close to the power assembly, is fixedly connected with the power assembly, one end of the first frame body, which is far away from the auxiliary frame, is provided with a sliding groove structure, one end of the second frame body, which is far away from the power assembly, is provided with a sliding rod structure matched with the sliding groove structure, one end of the sliding rod structure, which is far away from the power assembly, is provided with a first block body, the first block body is provided with a first inclined plane, the corresponding position of the inner wall of the sliding groove structure is provided with a buffer device, the buffer device comprises an inner groove structure, a buffer rod is arranged in the inner groove structure, a second inclined plane attached to the first inclined plane is arranged at one end, close to the first block, of the buffer rod, a first spring used for buffering and resetting is arranged at one end, far away from the first block, of the buffer rod, and a second spring is arranged between the first support body and the second support body. The suspension frame is scalable, through the grafting cooperation between slide bar structure and the spout structure between first support body and the second support body, when power assembly received the exogenic action, the impact of the flexible absorption external force of suspension frame accessible avoids power assembly to receive the damage under the impact. Be equipped with first inclined plane on the terminal first block of slide bar structure, the buffer beam that arranges perpendicularly with the slide bar structure corresponds the position and is equipped with the second inclined plane, through the cooperation between first inclined plane and the second inclined plane for the motion conversion of second support body along slide bar axial direction is the motion of buffer beam along its axial direction, and the compression of rethread first spring is absorbed the impact.

Preferably, the end of the buffer rod, which is far away from the first block, is provided with a first air bag, the first air bag comprises an air bag body and two inner plates, which are arranged in the air bag body and used for supporting the air bag body, the two inner plates are fixedly connected with the end surface of the buffer rod and the inner wall of the inner groove respectively, a second air bag is arranged between the second frame body and the power assembly, and a pipeline used for communicating is arranged between the second air bag and the first air bag. The effect of first gasbag is that the absorption of impact energy is accomplished to the cooperation first spring, provides gas for the second gasbag simultaneously for power assembly is when receiving external force impact, thereby the gas in the first gasbag gets into the second gasbag under the extrusion and fills the gap between second support body and the power assembly, avoids connection structure between power assembly and the second support body to produce the clearance and bump under the vibrations effect, thereby makes bolt isotructure not hard up under the collision.

Preferably, the number of the first inclined planes is two, two buffering devices are arranged at corresponding positions on the inner wall of the sliding chute structure, and the two first inclined planes correspond to the two buffering devices one by one respectively. The two first inclined planes are respectively positioned on two opposite end surfaces of the first block body, each first inclined plane corresponds to one buffer device, and when the slide bar moves, the motion directions of buffer rods in the two buffer devices are opposite, so that radial acting force generated on the slide bar during extrusion between the first inclined planes and the second inclined planes is offset. Make and keep the axial unanimity between first support body and the second support body, the buffer that increases simultaneously cooperates the second spring, can increase the absorption effect to the impact.

Preferably, a bolt connecting structure is arranged between the suspension frame and the power assembly. The bolt connection structure ensures the disassembly and assembly of the power assembly.

Preferably, the inner wall of the screw hole of the bolt structure is provided with a rubber layer. When the bolt passes through the screw hole, the rubber layer isolates the bolt from the bracket, thereby playing a role in shock absorption.

Therefore, the invention has the following beneficial effects: (1) the fixed points between the three suspension frames and the power assembly are enclosed to form a triangle, the centers of the triangle are overlapped with the gravity center of the power assembly, so that the weight of the power assembly can be uniformly shared by the three suspension frames, and when the power assembly is in a large-torque output state, the reaction force of the torque force of the power assembly is uniformly transmitted to the three suspension frames, so that the power assembly is prevented from being displaced due to the reaction force of the torque force, and the structural stability of the auxiliary frame is damaged; (2) the bolt structure is matched with the rubber layer to transmit the weight of the power assembly loaded by the suspension frame, and meanwhile, the power assembly is not rigidly connected with the auxiliary frame, so that the bidirectional transmission of vibration between the power assembly and the auxiliary frame is avoided; (3) the suspension bracket can absorb the impact of external force through expansion and contraction, so that the power assembly is prevented from being damaged under the impact action; (3) the second air bag prevents a connecting structure between the power assembly and the second frame body from generating a gap and colliding under the action of vibration, so that structures such as bolts are loosened under collision.

Drawings

FIG. 1 is a schematic diagram of an embodiment of the present invention.

Fig. 2 is an assembly view of the present invention.

In the figure: 1. the suspension device comprises a power assembly 2, a second frame body 3, a second spring 4, a sliding groove structure 5, a sliding rod structure 6, a first spring 7, a first air bag 8, a buffer rod 9, a support structure 10, a rubber layer 11, a first block 12, a first inclined plane 13, a second inclined plane 14, a second air bag 15, a first plate 16, a second plate 17, a third plate 18, a fourth plate 19, a suspension frame 20 and a first frame body.

Detailed Description

The invention is further described with reference to the following detailed description and accompanying drawings.

Examples

In the embodiment shown in fig. 1 and 2, the subframe is formed by enclosing a first plate 15, a second plate 16, a third plate 17 and a fourth plate 18, the four plates are welded, the third plate 17 is located at the opposite side of the first plate 15, the four plates form a frame-shaped subframe, and the power assembly 1 is arranged in the middle area. Two support structures 9 are welded on the first plate 15, one support structure 9 is welded on the third plate 17, one end, far away from the auxiliary frame, of each support structure 9 is provided with a screw hole, a rubber layer 10 is laid on the inner wall of each screw hole, and when bolts penetrate through the screw holes, the bolts are isolated from the supports through the rubber layers 10, so that the damping effect is achieved. The support structure 9 is connected with a suspension frame 19 through a bolt structure, the suspension frame 19 is formed by splicing a first frame body 20 and a second frame body 2, wherein one end of the first frame body 20 close to the support structure 9 is connected with the support structure 9 through the bolt structure, the other end is provided with a chute structure 4, two buffer devices are arranged in the chute structure 4, each buffer device comprises an inner chute structure, the two inner chute structures are symmetrically distributed along the central axis of the chute structure 4, each inner chute structure is internally provided with a buffer rod 8, one end of each buffer rod 8 close to the central axis of the chute structure 4 is provided with a second inclined surface 13, a first spring 6 is arranged between each buffer rod 8 and the bottom wall of each inner chute, a first air bag 7 is arranged in a cavity between each buffer rod 8 and the bottom wall of each inner chute, the upper end and the lower end of the bag body of each first air bag 7 are respectively provided with an inner plate, the, the other inner plate is fixed with the bottom wall of the inner groove. One end of the second frame body 2 close to the first frame body 20 is provided with a slide bar structure 5, the slide bar structure 5 is matched with the chute structure 4 to realize sliding connection between the first frame body 20 and the second frame body 2, a second spring 3 is arranged between the slide bar structure 5 and the chute structure 4, one end of the slide bar structure 5 far away from the second frame body 2 is provided with a first block 11, the corresponding position of the first block 11 is provided with two first inclined planes 12, each first inclined plane 12 corresponds to one buffer rod 8, and the first inclined planes 12 and the second inclined planes 13 are laminated. One end of the second frame body 2, which is far away from the first frame body 20, is connected with the power assembly 1 through a bolt, a second air bag 14 is arranged between the second frame body 2 and the power assembly 1, and the air bag is communicated with the first air bag 7 through a pipeline.

The power assembly 1 is fixed in the middle of the auxiliary frame through the three suspension frames 19, the fixing points between the three suspension frames 19 and the power assembly 1 enclose a triangle, and the center of the triangle is overlapped with the gravity center of the power assembly 1, so that the weight of the power assembly 1 can be uniformly shared by the three suspension frames 19. When vibration occurs, the power assembly 1 shifts, at this time, the second frame body 2 retracts into the chute structure 4 of the first frame body 20 along with the power assembly 1, at this time, the slide bar structure 5 and the chute structure 4 slide relatively, the second spring 3 is compressed, the first block body 11 at the tail end of the slide bar structure 5 moves towards the direction close to the support structure 9 along with the slide bar structure 5, the first inclined surface 12 on the first block body 11 extrudes with the second inclined surface 13, the first inclined surface 12 generates acting force on the second inclined surface 13, this force is resolved into a component force in the axial direction of the buffer rod 8, pushing the buffer rod 8 to move away from the first block 11, the first spring 6 compresses, at the same time, the first air bag 7 is compressed, and the air in the first air bag 7 is pressed to enter the second air bag 14 from the pipeline, so that the gap between the second frame body 2 and the power assembly 1 is filled with the second air bag 14. When the exogenic action disappears, under the effect of first spring 6, second spring 3, second support body 2 and buffer rod 8 reset, and at buffer rod 8 reset in-process, first gasbag 7 receives the pulling of two inner panels, and inside production negative pressure, the gas reflux in the second gasbag 14 is to first gasbag 7 in.

Claims

1. The utility model provides an electric motor car suspension arrangement structure, includes sub vehicle frame, power assembly and is located the suspension frame between sub vehicle frame and the power assembly, characterized by be equipped with supporting structure on the sub vehicle frame, be equipped with between supporting structure and the suspension frame and be used for absorbing bolt structure, can dismantle fixed connection between suspension frame and the power assembly.

2. The suspension arrangement structure for electric vehicle as claimed in claim 1, wherein said subframe comprises a first plate member, a second plate member, a third plate member and a fourth plate member, wherein two bracket structures are provided on said first plate member, and one bracket structure is provided on said third plate member.

3. The suspension arrangement structure of the electric vehicle as claimed in claim 1, wherein the suspension frame comprises a first frame body and a second frame body, one end of the first frame body close to the sub-frame is connected with the support through a shaft, one end of the second frame body close to the power assembly is fixedly connected with the power assembly, one end of the first frame body far away from the sub-frame is provided with a chute structure, one end of the second frame body far away from the power assembly is provided with a slide bar structure matched with the chute structure, one end of the slide bar structure far away from the power assembly is provided with a first block body, the first block body is provided with a first inclined surface, a buffer device is arranged at a position corresponding to the inner wall of the chute structure and comprises an inner groove structure, a buffer rod is arranged in the inner groove structure, one end of the buffer rod close to the first block body is provided with a second inclined surface jointed with the first inclined surface, and one, a second spring is arranged between the first frame body and the second frame body.

4. The suspension arrangement structure of the electric vehicle as claimed in claim 3, wherein the end of the buffer rod away from the first block is provided with a first air bag, the first air bag comprises a bag body and two inner plates in the bag body for supporting the bag body, the two inner plates are respectively and fixedly connected with the end surface of the buffer rod and the inner wall of the inner groove, a second air bag is arranged between the second frame body and the power assembly, and a pipeline for communication is arranged between the second air bag and the first air bag.

5. The suspension arrangement structure of an electric vehicle as claimed in claim 3, wherein the number of the first inclined planes is two, two buffering devices are provided at corresponding positions on the inner wall of the chute structure, and the two first inclined planes and the two buffering devices are respectively in one-to-one correspondence.

6. The suspension arrangement structure of an electric vehicle as claimed in claim 1, wherein a bolt connection structure is provided between the suspension frame and the power assembly.

7. The suspension arrangement structure of an electric vehicle as claimed in any one of claims 1 to 6, wherein the inner wall of the screw hole of the bolt structure is provided with a rubber layer.