CN212605435U

CN212605435U - Five-connecting-rod rear auxiliary frame

Info

Publication number: CN212605435U
Application number: CN202021422002.7U
Authority: CN
Inventors: 张鹏; 刘坚雄; 陆革威
Original assignee: Guangzhou Automobile Group Co Ltd
Current assignee: Guangzhou Automobile Group Co Ltd
Priority date: 2020-07-17
Filing date: 2020-07-17
Publication date: 2021-02-26
Anticipated expiration: 2030-07-17

Abstract

The utility model provides a five-connecting-rod rear auxiliary frame, which comprises a front cross beam, a rear cross beam, a left longitudinal beam and a right longitudinal beam, wherein the front cross beam is also provided with the left front beam and the right front beam, the left longitudinal beam is provided with the rear part of the left longitudinal beam, and the right longitudinal beam is also provided with the rear part of the right longitudinal beam; the rear wheel steering device further comprises a pair of first mounting brackets used for being connected with the rear wheel steering device, and the pair of first mounting brackets are respectively fixed to the rear side of the rear cross beam. The utility model provides a five-connecting-rod rear auxiliary frame can be used in conventional fuel vehicles, pure Electric Vehicles (EV) cars or Sports Utility Vehicles (SUV) cars, the assembly integration level of the five-connecting-rod rear auxiliary frame is high, the universality is better, the five-connecting-rod rear auxiliary frame is suitable for derivation of platformized cars, and the research and development cost and the period of products are shortened; and the five-link rear subframe can be compatible with rear wheel steering configuration, the arrangement and installation of a rear wheel steering device are solved, and the driving performance of the vehicle is improved through high-speed stability and a smaller turning diameter at low speed brought by the rear wheel steering configuration.

Description

Five-connecting-rod rear auxiliary frame

Technical Field

The utility model belongs to the technical field of vehicle chassis technique and specifically relates to a sub vehicle frame behind five connecting rods.

Background

The rear auxiliary frame is an important component of the chassis design, and the rear suspension formed by combining the rear auxiliary frame, the connecting rod and the elastic piece plays an important role in controlling stability and comfort of the whole vehicle. Conventional rear suspension forms are largely classified into independent suspensions and dependent suspensions. Wherein, the torsion beam of dependent suspension, difficult realization are controlled stability and the balance of travelling comfort, and the four-bar linkage of independent suspension occupies automobile body length direction space because of having the trailing arm to the design has the restriction to the automobile body longeron, consequently controls stability and the equilibrium interval of travelling comfort less. And in current back sub vehicle frame structure, can't realize the expansion of different rear wheel steering gears, lead to the performance promotion of rear suspension limited. Although some existing five-link rear sub-frames achieve the compatibility problem of rear wheel steering, the mounting position of the rear wheel steering is limited, and different vehicle types cannot be matched.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the balance of the sub vehicle frame structure relatively poor of controlling stability and travelling comfort behind the current car, and can't realize the shortcoming of compatible rear wheel steering, provide a sub vehicle frame behind five connecting rods.

The utility model provides a technical scheme that its technical problem adopted is: a five-connecting-rod rear auxiliary frame comprises a front cross beam, a rear cross beam, a left longitudinal beam and a right longitudinal beam, wherein the front cross beam is also provided with a left front beam extending from the joint of the front cross beam and the left longitudinal beam to the left front and a right front beam extending from the joint of the front cross beam and the right longitudinal beam to the right front; the rear wheel steering device further comprises a pair of first mounting brackets used for being connected with the rear wheel steering device, and the first mounting brackets are fixed to the rear side of the rear cross beam respectively.

The pair of second mounting brackets extend from the bottom of the rear cross beam to the joint of the rear cross beam and the left longitudinal beam and the joint of the rear cross beam and the right longitudinal beam respectively.

Specifically, the first mounting bracket is fixed between the rear cross beam and the second mounting bracket, and the first mounting bracket comprises a stamping plate with a U-shaped cross section, a pair of first mounting holes arranged on the stamping plate and connected with the rear wheel steering gear, and a gap arranged between the two first mounting holes and used for avoiding the rear wheel steering gear.

Specifically, a second mounting hole for connecting a camber arm is formed in the second mounting bracket, and the second mounting hole is located at the bottom of the first mounting bracket.

Further, the left front beam and the right front beam are integrally formed with the front cross beam.

The pair of third mounting brackets are respectively arranged on the bottom surfaces of the rear sides of the left longitudinal beam rear part and the right longitudinal beam rear part and extend towards the rear side from the left longitudinal beam rear part or the right longitudinal beam rear part.

The pair of fourth mounting brackets is used for connecting the transverse swing arm and is respectively arranged on the top surfaces of the rear parts of the left longitudinal beam and the right longitudinal beam.

Furthermore, the pair of mounting brackets is used for connecting the upper swing arm, and the pair of mounting brackets is arranged at the joint of the left longitudinal beam and the front cross beam and the joint of the right longitudinal beam and the front cross beam respectively.

Furthermore, the mounting structure further comprises a pair of sixth mounting brackets for connecting the longitudinal swing arms, and the pair of sixth mounting brackets are respectively arranged on the bottom surfaces of the left front beam and the right front beam.

And the four mounting steel sleeves are respectively arranged at the end part of the left front beam, the end part of the right front beam, the end part of the rear part of the left longitudinal beam and the end part of the rear part of the right longitudinal beam.

The utility model provides a beneficial effect of sub vehicle frame lies in behind five connecting rods: the five-connecting-rod rear auxiliary frame can be used in conventional fuel vehicles, pure Electric Vehicles (EV) cars or hybrid electric vehicles (SUV) cars, compared with a four-connection rear auxiliary frame structure, the five-connecting-rod rear auxiliary frame is high in assembly integration level and good in universality, is suitable for derivation of platform car types, shortens the research and development cost and period of products, is light and lean in design as much as possible in arrangement, and improves the operation stability response, the straight-line driving stability and the comfort of the whole car; and the five-link rear subframe can be compatible with a rear wheel steering configuration, the arrangement and installation of a rear wheel steering gear are solved, the rear wheel steering gear is fixed through the first mounting bracket and matched with a steering pull rod through the rear wheel steering gear, and the vehicle running performance is improved through high-speed stability and a smaller turning diameter at a low speed brought by the rear wheel steering configuration.

Drawings

Fig. 1 is a schematic perspective view of a first viewing angle of a five-link rear subframe according to the present invention;

fig. 2 is a schematic perspective view of a second viewing angle of the five-link rear subframe according to the present invention;

fig. 3 is a top view of a five-link rear subframe provided by the present invention;

fig. 4 is a rear view of the rear subframe of the five-link according to the present invention.

In the figure: 100-five-connecting-rod rear auxiliary frame, 10-front cross beam, 11-left front beam, 12-right front beam, 20-rear cross beam, 30-left longitudinal beam, 31-left longitudinal beam rear part, 40-right longitudinal beam, 41-right longitudinal beam rear part, 51-first mounting bracket, 511-punching plate, 512-first mounting hole, 513-notch, 52-second mounting bracket, 53-third mounting bracket, 54-fourth mounting bracket, 55-fifth mounting bracket, 56-sixth mounting bracket and 57-mounting steel sleeve.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, 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.

Referring to fig. 1-4, for the present invention provides a five-bar rear subframe 100, the five-bar rear subframe 100 can be used in a conventional fuel vehicle, a pure EV car or an SUV vehicle. The five-link rear subframe 100 includes a front cross member 10, a rear cross member 20, a left side member 30, and a right side member 40. The front cross beam 10, the rear cross beam 20, the left longitudinal beam 30 and the right longitudinal beam 40 are spliced into a framework with a structure shaped like a Chinese character 'jing' by welding.

Specifically, as shown in fig. 3, the front cross member 10 of the five-link rear subframe 100 further includes a left front member 11 extending leftward and forward from a connection with the left side member 30, and a right front member 12 extending rightward and forward from a connection with the right side member 40. The left front beam 11 and the right front beam 12 are integrally formed with the front cross member 10, and are formed by machining steel pipes having a predetermined diameter. The rear cross member 20 is a plate member formed by welding two sheet metal members with C-shaped cross sections in a manner of buckling up and down to be close to a rectangle, and is arranged between the left longitudinal beam 30 and the right longitudinal beam 40. The left side member 30 has a left side member rear portion 31 extending leftward and rearward from the connection with the rear cross member 20, and the right side member 40 also has a right side member rear portion 41 extending rightward and rearward from the connection with the rear cross member 20. The left longitudinal beam rear part 31 and the left longitudinal beam 30, the right longitudinal beam rear part 41 and the right longitudinal beam 40 are longitudinal beam structures formed by buckling and welding two L-shaped sheet metal parts up and down, and the left longitudinal beam rear part 31 and the right longitudinal beam rear part 41 are arranged in bilateral symmetry.

Further, the utility model provides a sub vehicle frame 100 behind five connecting rods still includes a pair of first installing support 51 that is used for connecting the rear wheel steering gear, and a pair of first installing support 51 is fixed in the rear side of rear end rail 20 respectively. The first mounting bracket 51 is disposed rearward of the entire five-link rear subframe 100 for attachment to a rear steering gear so that the five-link rear subframe 100 can be directly mounted in mating relationship with a rear steering gear. And this first installing support 51's setting can guarantee that rear frame 20 main part design is unchangeable simultaneously, and compatible rear wheel steering configuration realizes the four-wheel steering function, effectively improves low-speed steering convenience and high-speed stability and this first installing support 51 sets up and can guarantee that the rear wheel of different motorcycle types turns to and can follow and exchange in the rear side of rear frame 20, does benefit to the holistic platform design of back sub vehicle frame.

Further, as shown in fig. 2 and fig. 4, the present invention provides a five-bar rear subframe 100 further including a pair of second mounting brackets 52 for connecting the camber arms, wherein the pair of second mounting brackets 52 respectively extend from the bottom of the rear cross member 20 to the connection between the rear cross member 20 and the left longitudinal member 30 and the connection between the rear cross member 20 and the right longitudinal member 40. Each of the second mounting brackets 52 fixed to the five-link rear subframe 100 is formed by two sheet metal members joined to the bottom of the rear cross member 20 from the front and rear sides. The second mounting bracket 52 is provided primarily for securing the end of the camber arm. The second mounting bracket 52 is provided with a second mounting hole 521 for connecting the camber arm, and the second mounting hole 521 is located at the bottom of the first mounting bracket 51. Because both the spring and the shock absorber in the rear suspension assembly are arranged on the camber arm, the inner arrangement point of the camber arm in the rear suspension assembly can be adjusted by adjusting the specifically designed position of the second mounting hole 521 on the second mounting bracket 52, so that the adjustment of the spring-lever ratio is realized, the shock absorption efficiency of the spring in the rear suspension assembly is improved, the energy transmitted to a vehicle body is reduced, and the influence on passengers in the vehicle can be reduced when the vehicle is impacted by a road surface; meanwhile, the vibration is attenuated and filtered through the efficient damping of the shock absorber, so that a better comfort level is achieved; having a larger spring-to-lever ratio also increases the rear seat and trunk space simultaneously.

Further, as shown in fig. 4, in the present embodiment, a first mounting bracket 51 for arranging the rear wheel steering gear is fixed between the rear cross member 20 and the second mounting bracket 52, and the first mounting bracket 51 includes a stamped plate 511 having a U-shaped cross section, a pair of first mounting holes 512 provided on the stamped plate 511 and connected to the rear wheel steering gear, and a notch 513 provided between the two first mounting holes 512 for avoiding the rear wheel steering gear. The arrangement of the rear wheel steering gear in the rear suspension assembly is realized by the provision of the pair of first mounting brackets 51, and the vehicle running performance can be improved by the high-speed stability and the smaller turning diameter at low speed brought about by the rear wheel steering configuration.

Further, as shown in fig. 1 and 2, the present invention provides a five-link rear subframe 100 further comprising a pair of third mounting brackets 53 for connecting the stabilizer bar, wherein the pair of third mounting brackets 53 are respectively disposed on the rear bottom surfaces of the left side member rear portion 31 and the right side member rear portion 41, and each of the third mounting brackets 53 extends to the rear side from the left side member rear portion 31 or the right side member rear portion 41. The third mounting bracket 53 is a stamped part having a U-shaped cross section, and is provided with a mounting hole for fixing the stabilizer bar, and the third mounting bracket 53 is provided on the bottom surface of the left side member rear portion 31 or the right side member rear portion 41 and extends rearward. When the stabilizer bar is arranged in the rear suspension assembly, the stabilizer bar can be arranged on the outer side of the rear part of the whole rear auxiliary frame 100, parts such as a motor and a rear wheel steering gear can be avoided in the arrangement, and the stabilizer bar can be connected to a shaft joint, so that the stabilizer bar is simple in trend, high in efficiency, small in wire diameter and capable of achieving the purpose of light weight.

Further, as shown in fig. 1 and fig. 2, the present invention provides a five-link rear subframe 100 further comprising a pair of fourth mounting brackets 54 for connecting the lateral swing arms, a pair of fifth mounting brackets 55 for connecting the upper swing arms, and a pair of sixth mounting brackets 56 for connecting the longitudinal swing arms; a pair of fourth mounting brackets 54 are provided on the top surfaces of the left and right side member

rear portions

31 and 41, respectively; a pair of fifth mounting brackets 55 are respectively arranged at the joint of the left longitudinal beam 30 and the front cross beam 10 and the joint of the right longitudinal beam 40 and the front cross beam 10; a pair of sixth mounting brackets 56 are provided on the bottom surfaces of the left and right

front beams

11 and 12, respectively. The fourth mounting bracket 54 is connected with a transverse swing arm in the rear suspension assembly through a bolt; the fifth mounting bracket 55 is connected with the upper swing arm in the rear suspension assembly through a bolt; the sixth mounting bracket 56 is connected to the longitudinal swing arm in the rear suspension assembly by bolts. The camber arm, the yaw arm, the pitch arm, the upper swing arm, and the tie rod connected to the rear wheel steering gear in the five-link rear subframe 100 form five different link structures, which are connected by the second mounting bracket 52, the fourth mounting bracket 54, the sixth mounting bracket 56, the fifth mounting bracket 55, and the first mounting bracket 51, respectively. The sizes and the structures of all swing arms in the rear suspension assemblies of different vehicle types are slightly different, so that the expansion and the derivation of the rear auxiliary frame 100 among different vehicle types can be realized only by adjusting the specific positions and the sizes of all the mounting brackets on the rear auxiliary frame 100, the research and development time and the cost of the rear auxiliary frame 100 can be saved, and the production and the assembly of the rear auxiliary frame 100 are facilitated. Wherein, be located a pair of sixth installing support 56 on the bottom surface of left front beam 11 and right front beam 12, can be with traditional needs through with the automobile body connected indulge swing arm lug connection on back sub vehicle frame 100, not only made things convenient for the assembly of whole rear suspension assembly, can reduce the occupation to the vehicle bottom space in arranging, still reduced the location on indulge swing arm and the car simultaneously, promoted the assembly precision.

Further, as shown in fig. 1 and 2, the present invention provides a five-link rear subframe 100 further including a pair of mounting steel sleeves 57 respectively disposed at the end of the left front beam 11, the end of the right front beam 12, the end of the left side member rear portion 31, and the end of the right side member rear portion 41. And bushings are arranged in the steel sleeves at the four corners of the main body of the rear auxiliary frame 100 and are flexibly screwed on the vehicle body.

The utility model provides a five connecting rod back sub vehicle frame 100 can use in conventional fuel vehicle, pure EV car or SUV motorcycle type, compare in four connection back sub vehicle frame structures, the assembly integrated level of five connecting rod back sub vehicle frame 100 is high, the commonality is better, be applicable to deriving of platformization motorcycle type, shorten the research and development cost and the cycle of product, arrange lightweight and lean design as far as possible, all promote stable response of operation and straight line driving stability and travelling comfort to whole car.

The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. A five-connecting-rod rear auxiliary frame is characterized by comprising a front cross beam, a rear cross beam, a left longitudinal beam and a right longitudinal beam, wherein the front cross beam is also provided with a left front beam extending from the joint of the front cross beam and the left longitudinal beam to the left front and a right front beam extending from the joint of the front cross beam and the right longitudinal beam to the right front; the rear wheel steering device further comprises a pair of first mounting brackets used for being connected with the rear wheel steering device, and the first mounting brackets are fixed to the rear side of the rear cross beam respectively.

2. The five-link rear subframe of claim 1 further comprising a pair of second mounting brackets for connecting said camber arms, said pair of second mounting brackets extending from a bottom portion of said rear cross member to a junction of said rear cross member and said left side member and a junction of said rear cross member and said right side member, respectively.

3. The five-link rear subframe according to claim 2 wherein said first mounting bracket is secured between said rear cross member and said second mounting bracket, said first mounting bracket including a stamped plate having a U-shaped cross-section, a pair of first mounting holes disposed in said stamped plate for connection to said rear wheel steering gear, and a notch disposed between said first mounting holes for avoiding said rear wheel steering gear.

4. The five-link rear subframe of claim 3 wherein said second mounting bracket defines a second mounting hole for attachment of a camber arm, said second mounting hole being located at a bottom of said first mounting bracket.

5. The five-link rear subframe of claim 1 wherein said left front beam and said right front beam are integrally formed with said front cross member.

6. The five-link rear subframe of any one of claims 1-5 further comprising a pair of third mounting brackets for attachment of a stabilizer bar, said pair of third mounting brackets being disposed on rear bottom surfaces of said left side member rear portion and said right side member rear portion, respectively, and each extending rearwardly from either said left side member rear portion or said right side member rear portion.

7. The five-link rear subframe of claim 6 further comprising a pair of fourth mounting brackets for connecting the swing arms, said pair of fourth mounting brackets being disposed on top of the rear portions of said left and right side members, respectively.

8. The five-link rear subframe of claim 6 further comprising a pair of fifth mounting brackets for connecting an upper swing arm, wherein a pair of said fifth mounting brackets are respectively disposed at a junction of said left side member and said front cross member and at a junction of said right side member and said front cross member.

9. The five-link rear subframe of claim 6 further comprising a pair of sixth mounting brackets for connecting the longitudinal swing arms, the pair of sixth mounting brackets being disposed on bottom surfaces of the left front beam and the right front beam, respectively.

10. The five-link rear subframe of claim 6 further comprising four mounting steel bushings disposed at the end of said left front beam, the end of said right front beam, the end of said left side beam rear portion and the end of said right side beam rear portion, respectively.