CN112141213A - Rear auxiliary frame and automobile - Google Patents
Rear auxiliary frame and automobile Download PDFInfo
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- CN112141213A CN112141213A CN201910576407.1A CN201910576407A CN112141213A CN 112141213 A CN112141213 A CN 112141213A CN 201910576407 A CN201910576407 A CN 201910576407A CN 112141213 A CN112141213 A CN 112141213A
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- 238000004519 manufacturing process Methods 0.000 abstract description 12
- 238000009434 installation Methods 0.000 description 12
- 238000013461 design Methods 0.000 description 7
- 238000011161 development Methods 0.000 description 7
- 238000003466 welding Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 230000008093 supporting effect Effects 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000005452 bending Methods 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 238000004080 punching Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000012356 Product development Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000009795 derivation Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D21/00—Understructures, i.e. chassis frame on which a vehicle body may be mounted
- B62D21/02—Understructures, i.e. chassis frame on which a vehicle body may be mounted comprising longitudinally or transversely arranged frame members
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D21/00—Understructures, i.e. chassis frame on which a vehicle body may be mounted
- B62D21/09—Means for mounting load bearing surfaces
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D21/00—Understructures, i.e. chassis frame on which a vehicle body may be mounted
- B62D21/11—Understructures, i.e. chassis frame on which a vehicle body may be mounted with resilient means for suspension, e.g. of wheels or engine; sub-frames for mounting engine or suspensions
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Abstract
The invention belongs to the technical field of automobile chassis, and particularly relates to a rear auxiliary frame and an automobile. The left front beam bracket of the rear auxiliary frame is connected with the lower part of the left end of the front cross beam and the lower part of the front end of the left longitudinal beam; the right front beam support is connected with the lower part of the right end of the front cross beam and the lower part of the front end of the right longitudinal beam; the left lower swing arm support is connected with the lower part of the left end of the rear cross beam and the lower part of the rear end of the left longitudinal beam, and the right lower swing arm support is connected with the lower part of the right end of the rear cross beam and the lower part of the rear end of the right longitudinal beam; the left connecting bracket is connected between the left toe-in bracket and the left lower swing arm bracket; the right connecting bracket is connected between the right toe-in bracket and the right lower swing arm bracket. The invention improves the structural mode and performance of the rear auxiliary frame while meeting the requirements of the durability and comfort of the whole automobile, realizes the aim of light weight, reduces the production cost and improves the production efficiency.
Description
Technical Field
The invention belongs to the technical field of automobile chassis, and particularly relates to a rear auxiliary frame and an automobile.
Background
The rear auxiliary frame of the automobile is an important component in an automobile chassis system, the rear auxiliary frame is connected with parts such as an automobile body and a suspension, excitation such as vibration and noise of a road surface can be reduced, and transmission to the automobile body is achieved, and meanwhile the rigidity of the suspension can be improved, so that the whole automobile has good durability and comfort.
The front beam support and the lower swing arm support have great influence on the NVH (Noise, Vibration and Harshness) performance and the service life of the whole vehicle, so that the front beam support and the lower swing arm support are very important load transfer structures in an automobile chassis system, and further have higher design requirements on the structural mode of the rear auxiliary frame and the dynamic stiffness and the fatigue strength of the front beam support and the lower swing arm support when the rear auxiliary frame is designed. In the existing rear auxiliary frame, a toe-in support and a lower swing arm support are generally in cantilever structures, and the performance and the light weight requirement of the toe-in support and the lower swing arm support of the cantilever structures on the rear auxiliary frame cannot be well met. Specifically, the improvement of the modal of the existing rear subframe, the dynamic stiffness and the fatigue strength of the mounting points of the toe-in bracket and the lower swing arm bracket is mainly realized by increasing the plate thicknesses of the front and rear cross beam sections of the rear subframe and the toe-in bracket and the lower swing arm bracket, so that the weight increase and the section characteristics of the rear subframe are complex, the requirement on light weight is not favorably met, meanwhile, the increase of production cost and the reduction of production efficiency can be caused, and the improvement of the structural modal and the performance of the rigidity, NVH and the like of the rear subframe by the scheme is not ideal (the rigidity is improved by about 50%, and the structural modal is improved by about 30 HZ).
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the utility model provides a back sub vehicle frame and car to the problem that among the prior art, the performance and the lightweight requirement of car back sub vehicle frame can't obtain fine compromise.
In order to solve the technical problem, on the one hand, an embodiment of the invention provides a rear subframe, which comprises a front cross beam, a rear cross beam, a left longitudinal beam, a right longitudinal beam, a left toe-in bracket, a right toe-in bracket, a left lower swing arm bracket, a right lower swing arm bracket, a left connecting bracket and a right connecting bracket; the left end of the rear cross beam is connected with the rear end of the left longitudinal beam, and the right end of the rear cross beam is connected with the rear end of the right longitudinal beam; the front end of the left longitudinal beam is connected to the left end of the front cross beam, and the front end of the right longitudinal beam is connected to the right end of the front cross beam;
the left toe-in bracket is connected with the lower part of the left end of the front cross beam and the lower part of the front end of the left longitudinal beam; the right front beam bracket is connected with the lower part of the right end of the front cross beam and the lower part of the front end of the right longitudinal beam; the left lower swing arm support is connected with the lower part of the left end of the rear cross beam and the lower part of the rear end of the left longitudinal beam, and the right lower swing arm support is connected with the lower part of the right end of the rear cross beam and the lower part of the rear end of the right longitudinal beam;
the left connecting bracket is connected between the left toe-in bracket and the left lower swing arm bracket; the right connecting support is connected between the right toe-in support and the right lower swing arm support.
Optionally, the left toe-in bracket comprises a left toe-in front plate and a left toe-in rear plate connected with the left toe-in front plate, the front end of the left connecting bracket and the left end of the front cross beam are both connected with the left toe-in front plate, and the front end of the left connecting bracket, the left end of the front cross beam and the front end of the left longitudinal beam are all connected with the left toe-in rear plate;
the right front beam support comprises a right front beam front plate and a right front beam rear plate connected with the right front beam front plate, the front end of the right connecting support is connected with the right front beam front plate and the right front beam rear plate, the front end of the right connecting support and the right end of the front cross beam are connected with the right front beam front plate, and the front end of the right connecting support, the right end of the front cross beam and the front end of the right longitudinal beam are connected with the right front beam rear plate.
Optionally, the left lower swing arm support comprises a left lower swing arm front plate and a left lower swing arm rear plate connected with the left lower swing arm front plate, the rear end of the left connecting support and the left end of the rear cross beam are connected with the left lower swing arm front plate, and the left longitudinal beam is connected with the left lower swing arm rear plate;
the right lower swing arm support comprises a right lower swing arm front plate and a right lower swing arm rear plate connected with the right lower swing arm front plate, the rear end of the right connecting support and the right end of the rear cross beam are connected with the right lower swing arm front plate, and the right longitudinal beam is connected with the right lower swing arm rear plate.
Optionally, the front end of the left lower swing arm front plate is provided with a first flange for connecting the rear end of the left connecting support, and the front end of the right lower swing arm front plate is provided with a second flange for connecting the rear end of the left connecting support.
Optionally, the rear end of the left connecting bracket is welded on the first flanging; the rear end of the right connecting bracket is welded on the second flanging.
Optionally, the front cross beam, the left longitudinal beam and the right longitudinal beam are all tubular beam structures, and the rear cross beam is a stamped part.
Optionally, the cross sections of the middle parts of the front cross beam, the left longitudinal beam and the right longitudinal beam are circular; the cross sections of the rear end of the left longitudinal beam, the rear end of the right longitudinal beam and the left end and the right end of the front cross beam are flat.
Optionally, mounting holes are formed in the rear end of the left longitudinal beam, the rear end of the right longitudinal beam and the left end and the right end of the front cross beam; the rear end of the left longitudinal beam, the rear end of the right longitudinal beam, and the left end and the right end of the front cross beam are connected with the vehicle body through mounting sleeves or bushings penetrating through the mounting holes.
Optionally, the left connecting bracket and the right connecting bracket are C-shaped in cross section.
According to the rear auxiliary frame provided by the embodiment of the invention, the left end of the rear cross beam is connected with the rear end of the left longitudinal beam, and the right end of the rear cross beam is connected with the rear end of the right longitudinal beam; the front end of the left longitudinal beam is connected with the left end of the front cross beam, and the front end of the right longitudinal beam is connected with the right end of the front cross beam; the left toe-in bracket is connected with the lower part of the left end of the front cross beam and the lower part of the front end of the left longitudinal beam; the right front beam support is connected with the lower part of the right end of the front cross beam and the lower part of the front end of the right longitudinal beam; the left lower swing arm support is connected with the lower part of the left end of the rear cross beam and the lower part of the rear end of the left longitudinal beam, and the right lower swing arm support is connected with the lower part of the right end of the rear cross beam and the lower part of the rear end of the right longitudinal beam; therefore, the front cross beam, the rear cross beam, the left longitudinal beam, the right longitudinal beam, the left front beam support, the right front beam support, the left lower swing arm support and the right lower swing arm support are connected stably, the requirements of the whole automobile on durability, comfort, strength and rigidity of the whole automobile can be met, and the performance of the rear auxiliary frame is improved.
Meanwhile, the left connecting bracket is connected between the left toe-in bracket and the left lower swing arm bracket; the right connecting bracket is connected between the right toe-in bracket and the right lower swing arm bracket. Therefore, the rear subframe enables the front beam support (comprising the left front beam support and the right front beam support) and the lower swing arm support (comprising the left lower swing arm support and the right lower swing arm support) to form two-end supporting structures through the connecting supports, so that the Y-direction span of the connecting supports obviously improves the first-order torsion mode and the first-order bending mode (the structural mode is improved by about 60HZ) of the rear subframe and the dynamic stiffness value (the stiffness is improved by about 200%) of the mounting points of the front beam support and the lower swing arm support, and further improves the NVH performance; meanwhile, the supporting capacity, the strength and the fatigue life of the rear auxiliary frame are obviously improved, the platform derivative capacity of the rear auxiliary frame is enhanced, the requirements of the durability, the comfort, the strength and the rigidity of the whole automobile of the automobile are met, the thicknesses of the toe-in support and the lower swing arm support are reduced, the light weight target is realized, the production cost is reduced, and the production efficiency is improved. Meanwhile, the invention has the advantages of simple structure, simple manufacturing process, high production efficiency, less investment of mould and development cost and short development period.
On the other hand, the embodiment of the invention also provides an automobile which comprises the rear auxiliary frame.
Drawings
FIG. 1 is a front view of a rear subframe according to one embodiment of the present invention.
FIG. 2 is a left side view of the rear subframe of one embodiment of the present invention.
The reference numerals in the specification are as follows:
1. a front cross member; 2. a rear cross member; 3. a left stringer; 4. a right stringer; 5. a left toe-in bracket; 51. a left toe-in front plate; 52. a left toe back plate; 6. a right toe-in bracket; 61. a right toe-in front plate; 62. a right front rear panel; 7. a left lower swing arm support; 71. a left lower swing arm front plate; 72. a left lower swing arm back plate; 8. a lower right swing arm support; 81. a lower right swing arm front plate; 82. a lower right swing arm back plate; 83. second flanging; 9. a left connecting bracket; 10. a right connecting bracket; 11. and (5) installing the sleeve.
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", "front", "rear", "left", "right", "middle", and the like, are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular orientation, and thus are not to be construed as limiting the present invention.
As shown in fig. 1 and 2, fig. 1 is a front view of a rear subframe according to an embodiment of the present invention; FIG. 2 is a left side view of the rear subframe of one embodiment of the present invention. In the present invention, in order to better show the structure of the rear subframe in fig. 1, the rear subframe shown in fig. 1 is placed in a turned manner with the position where it is installed on the vehicle, and at this time, the left in the present invention is the right of the rear subframe shown in fig. 1 (for example, the left end of the rear cross member 2, the left end of the front cross member 1, etc.), and the right is the left of the rear subframe shown in fig. 1 (for example, the right end of the front cross member 1, the right end of the rear cross member 2, etc.); the front part is the upper part of the rear auxiliary frame shown in the figure 1 (such as a front cross beam 1, a left front beam bracket 5, a right front beam bracket 6, the front end of a left longitudinal beam 3, the front end of a right longitudinal beam 4, the lower part of the front end of the left longitudinal beam 3, the lower part of the front end of the right longitudinal beam 4 and the like), and the rear part is the lower part of the rear auxiliary frame shown in the figure 1 (such as a rear cross beam 2); the "upper" position is the left position of the rear subframe of fig. 2, and the "lower" position is the right position of the rear subframe of fig. 2 (for example, the left lower swing arm bracket 7, the right lower swing arm bracket 8, the left lower end portion of the front cross member 1, the front lower end portion of the left side member 3, the right lower end portion of the front cross member 1, the front lower end portion of the right side member 4, etc.).
As shown in fig. 1 and 2, an embodiment of the present invention provides a rear subframe, which includes a front cross beam 1, a rear cross beam 2, a left longitudinal beam 3, a right longitudinal beam 4, a left front beam bracket 5, a right front beam bracket 6, a left lower swing arm bracket 7, a right lower swing arm bracket 8, a left connecting bracket 9, and a right connecting bracket 10; the left end of the rear cross beam 2 is connected with the rear end of the left longitudinal beam 3, and the right end of the rear cross beam 2 is connected with the rear end of the right longitudinal beam 4; the front end of the left longitudinal beam 3 is connected to the left end of the front cross beam 1, and the front end of the right longitudinal beam 4 is connected to the right end of the front cross beam 1; preferably, the left longitudinal beam 3 and the right longitudinal beam 4 are symmetrically arranged. Further, the connection manner between the front cross member 1, the rear cross member 2, the left longitudinal member 3 and the right longitudinal member 4 includes, but is not limited to, welding.
The left toe-in bracket 5 is connected with the lower part of the left end of the front cross beam 1 and the lower part of the front end of the left longitudinal beam 3; the right toe-in bracket 6 is connected with the lower part of the right end of the front cross beam 1 and the lower part of the front end of the right longitudinal beam 4; so that the connection (preferably welded) between the front cross member 1 and the left and right side members 3 and 4 is more stable, improving the rear sub frame performance. Preferably, the left front beam bracket 5 and the right front beam bracket 6 are both punch-formed structural members so as to meet the requirements of strength and rigidity.
The left lower swing arm bracket 7 is connected with the lower part of the left end of the rear cross beam 2 and the lower part of the rear end of the left longitudinal beam 3, and the right lower swing arm bracket 8 is connected with the lower part of the right end of the rear cross beam 2 and the lower part of the rear end of the right longitudinal beam 4; so that the left lower swing arm support 7 and the right lower swing arm support 8 are more firmly connected (preferably welded) with the rear cross beam 2, the left longitudinal beam 3 and the right longitudinal beam 4, and the performance of the rear auxiliary frame is improved. Preferably, the left lower swing arm support 7 and the right lower swing arm support 8 are both formed by punching and molding steel plates so as to meet the requirements of strength and rigidity.
The left connecting bracket 9 is connected (preferably welded) between the left toe bracket 5 and the left lower swing arm bracket 7; the right connecting bracket 10 is connected (preferably welded) between the right toe bracket 6 and the right lower swing arm bracket 8. In one embodiment, as shown in fig. 1 and 2, the front end of the left connecting bracket 9 is connected with the lower part of the left toe bracket 5, and the rear end of the left connecting bracket 9 is connected with the front end of the left lower swing arm bracket 7; the front end of the right connecting bracket 10 is connected with the lower part of the right toe-in bracket 6; the rear end of the right connecting bracket 10 is connected with the front end of the right lower swing arm bracket 8; however, in the present invention, the connection manner of the left connecting bracket 9 and the right connecting bracket 10 is not limited to that shown in fig. 1 and fig. 2, for example, the front end of the left connecting bracket 9 (the right connecting bracket 10 is the same) may be connected to the side wall of the left toe-in bracket 5, as long as the requirements of performance, light weight, etc. are met. As preferred, left side linking bridge 9 with right linking bridge 10's cross-section is the C shape, just left side linking bridge 9 with right linking bridge 10 is by steel sheet stamping forming to satisfy its intensity and rigidity demand, understandably, stamping forming for have the C shape cross-section left linking bridge 9 with right linking bridge 10 compares the tubular beam structure, can satisfy the lightweight requirement better, and compares the mounting process of tubular beam structure simpler.
According to the rear auxiliary frame provided by the embodiment of the invention, the front cross beam 1, the rear cross beam 2, the left longitudinal beam 3, the right longitudinal beam 4, the left front beam bracket 5, the right front beam bracket 6, the left lower swing arm bracket 7 and the right lower swing arm bracket 8 are stably connected, so that the requirements of the whole vehicle on durability, comfort, strength and rigidity can be met, and the performance of the rear auxiliary frame is improved. Meanwhile, the front end of the left connecting bracket 9 is connected with the lower part of the left toe-in bracket 5, and the rear end of the left connecting bracket 9 is connected with the front end of the left lower swing arm bracket 7; the front end of the right connecting bracket 10 is connected with the lower part of the right toe-in bracket 6; the rear end of the right connecting bracket 10 is connected with the front end of the right lower swing arm bracket 8. Therefore, the rear subframe in the invention enables the front beam support (comprising the left front beam support 5 and the right front beam support 6) and the lower swing arm support (comprising the left lower swing arm support 7 and the right lower swing arm support 8) to form a two-end supporting structure through the connecting support, so that the Y-direction span of the connecting support obviously improves the first-order torsion mode and the first-order bending mode (the structural mode is improved by about 60HZ) of the rear subframe and the dynamic stiffness value (the stiffness is improved by about 200%) of the mounting point of the front beam support and the lower swing arm support, and further improves the NVH performance; meanwhile, the supporting capacity, the strength and the fatigue life of the rear auxiliary frame are obviously improved, the platform derivative capacity of the rear auxiliary frame is enhanced, the requirements of the durability, the comfort, the strength and the rigidity of the whole automobile of the automobile are met, the thicknesses of the toe-in support and the lower swing arm support are reduced, the light weight target is realized, the production cost is reduced, and the production efficiency is improved. Meanwhile, the invention has the advantages of simple structure, simple manufacturing process, high production efficiency, less investment of mould and development cost and short development period.
In an embodiment, as shown in fig. 1 and fig. 2, the left toe bracket 5 includes a left toe front plate 51 and a left toe rear plate 52 connected to the left toe front plate 51, the front end of the left connecting bracket 9 and the left end of the front cross beam 1 are both connected to the left toe front plate 51, and the front end of the left connecting bracket 9, the left end of the front cross beam 1 and the front end of the left side beam 3 are all connected to the left toe rear plate 52; the right toe-in bracket 6 comprises a right toe-in front plate 61 and a right toe-in rear plate 62 connected with the right toe-in front plate 61, the front end of the right connecting bracket 10 is connected with the right toe-in front plate 61 and the right toe-in rear plate 62, the front end of the right connecting bracket 10 and the right end of the front cross beam 1 are connected with the right toe-in front plate 61, and the front end of the right connecting bracket 10, the right end of the front cross beam 1 and the front end of the right longitudinal beam 4 are connected with the right toe-in rear plate 62.
Understandably, because the left front beam bracket 5 and the right front beam bracket 6 are mounting points, the requirements on the dynamic stiffness and the fatigue strength are high, if the left front beam bracket 5 and the right front beam bracket 6 are only formed by integrally punching, at this time, a closed section cannot be formed in the punched left front beam bracket 5 and the punched right front beam bracket 6 (at most, only a C-shaped section can be formed), and at this time, the section strength of the left front beam bracket 5 and the right front beam bracket 6 cannot be ensured; in the present embodiment, the left toe-in front plate 51, the left toe-in rear plate 52, the right toe-in front plate 61 and the right toe-in rear plate 62 are all formed by stamping in a split manner, the split stamping process is simpler than the integral forming process, the left toe-in front plate 51 and the left toe-in rear plate 52 are welded to form the left toe-in bracket 5, and the right toe-in front plate 61 and the right toe-in rear plate 62 are welded to form the right toe-in bracket 6; thus, the left front beam bracket 5 and the right front beam bracket 6 can ensure that the stamping forming process is simpler under the condition of ensuring the closed section and ensuring the section strength. Understandably, in the present invention, the connection manner between the left front beam bracket 5 (including the left front beam front plate 51 and the left front beam rear plate 52) and the right front beam bracket 6 (including the right front beam front plate 61 and the right front beam rear plate 62) and the front cross beam 1, and between the left longitudinal beam 3 and the right longitudinal beam 4 can be changed according to the requirement, as long as the left front beam bracket 5 and the left longitudinal beam 3 and the front cross beam 1, and between the right front beam bracket 6 and the right longitudinal beam 4 and the front cross beam 1 can form a closed structure (in this case, the left front beam bracket 5 and the right front beam bracket 6 both form a closed cross section), so as to enhance the rigidity and the bearing capacity of the left front beam bracket 5 and the right front beam bracket 6.
In one embodiment, as shown in fig. 1 and 2, the left lower swing arm bracket 7 includes a left lower swing arm front plate 71 and a left lower swing arm rear plate 72 connected to the left lower swing arm front plate 71, the rear end of the left connecting bracket 9 and the left end of the rear cross member 2 are connected to the left lower swing arm front plate 71, and the left side member 3 is connected to the left lower swing arm rear plate 72; the right lower swing arm support 8 comprises a right lower swing arm front plate 81 and a right lower swing arm rear plate 82 connected with the right lower swing arm front plate 81, the rear end of the right connecting support 10 and the right end of the rear cross beam 2 are connected with the right lower swing arm front plate 81, and the right longitudinal beam 4 is connected with the right lower swing arm rear plate 82.
Understandably, because the left lower swing arm support 7 and the right lower swing arm support 8 are mounting points, the requirements on the dynamic stiffness and the fatigue strength are high, if the left lower swing arm support 7 and the right lower swing arm support 8 are only formed by integral punching, at the moment, a closed section (at most, a C-shaped section can only be formed) cannot be formed in the punched left lower swing arm support 7 and the right lower swing arm support 8, and at the moment, the section strength of the left lower swing arm support 7 and the right lower swing arm support 8 cannot be ensured; in the embodiment, the left lower swing arm front plate 71, the left lower swing arm rear plate 72, the right lower swing arm front plate 81 and the right lower swing arm rear plate 82 are all formed by stamping in a piece type, the piece type stamping process is simpler than the integral forming process, the left lower swing arm front plate 71 and the left lower swing arm rear plate 72 are welded to form a left lower swing arm support 7, and the right lower swing arm front plate 81 and the right lower swing arm rear plate 82 are welded to form a right lower swing arm support 8; so, can be so that swing arm support 7 under left side and swing arm support 8 under the circumstances of guaranteeing to form closed section in order to guarantee section strength under, still make stamping forming's technology simpler. Understandably, in the present invention, the connection manner between the left lower swing arm bracket 7 (including the left lower swing arm front plate 71 and the left lower swing arm rear plate 72) and the right lower swing arm bracket 8 (including the right lower swing arm front plate 81 and the right lower swing arm rear plate 82) and the rear cross member 2, the left longitudinal member 3 and the right longitudinal member 4 may be changed according to the requirement, for example, in the present invention, if the installation boundary condition, the corresponding position of installation and the weight requirement have shown that the left lower swing arm bracket 7 and the left longitudinal member 3, the right lower swing arm bracket 8 and the right longitudinal member 4 are not needed to be connected together, the left lower swing arm bracket 7 and the right lower swing arm bracket 8 may not be connected together with the left longitudinal member 3 or/and the right longitudinal member 4.
In one embodiment, as shown in fig. 1 and 2, the front end of the left lower swing arm front plate 71 is provided with a first flange (not shown) for connecting the rear end of the left connecting bracket 9, and the front end of the right lower swing arm front plate 81 is provided with a second flange 83 for connecting the rear end of the left connecting bracket 9. The shape of the first and second flanges 83 can be set according to the requirement. Preferably, the rear end of the left connecting bracket 9 is welded on the first turned edge; the rear end of the right connecting bracket 10 is welded to the second flange 83. Understandably, as shown in fig. 2, the second flange 83 (the same as the first flange) is wrapped around the rear end of the right connecting bracket 10, and finally the outer circumference of the rear end of the right connecting bracket 10 is welded to the inner side wall of the second double-edged white 83, so that the welding area between the two is larger, and the connection is more stable.
In one embodiment, as shown in fig. 1 and 2, the front cross member 1, the left longitudinal member 3, and the right longitudinal member 4 are all of a tubular beam structure, and the rear cross member 2 is a stamped and formed member. That is, front beam 1, left longeron 3 and right longeron 4 are the fashioned tubular beams structure of steel pipe bending, so, three's technology shaping is simple, and processing is convenient. The rear auxiliary frame is connected with an automobile body through the front cross beam 1, the left longitudinal beam 3 and the right longitudinal beam 4. Consequently, at the design initial stage of back sub vehicle frame, can plan the pipe diameter size of front beam 1, left longeron 3 and right longeron 4 for the pipe diameter after the planning accords with the design demand can. For example, the pipe diameter size of the tubular beams of the front cross beam 1, the left longitudinal beam 3 and the right longitudinal beam 4 of the rear subframe meets the following design requirements: the designed rear auxiliary frame must simultaneously meet the installation requirements of rigid connection with the automobile body through the installation sleeve 11 and flexible connection through a bushing; when making back sub vehicle frame use in the different performance motorcycle types of the side weight, only need lead to the connected mode (through installing sleeve 11 or bushing connection) between switching back sub vehicle frame and the automobile body, and need not develop back sub vehicle frame again, and then make the platformization of back sub vehicle frame derive more easily, the universalization rate is higher. Meanwhile, the left lower swing arm support 7 and the right lower swing arm support 8 are both mounted on the rear cross beam 2, and the supporting force required to be borne by the rear cross beam 2 is larger, so that the rear cross beam 2 is designed into a stamping forming part, and the requirement of light weight can be met while a sufficient supporting effect is provided (compared with a tubular beam structure, the tubular beam structure can be lighter in weight under the condition of the same bearing capacity).
In one embodiment, as shown in fig. 1 and 2, the cross sections of the middle parts of the front cross beam 1, the left longitudinal beam 3 and the right longitudinal beam 4 are circular; the sections of the rear end of the left longitudinal beam 3, the rear end of the right longitudinal beam 4 and the left end and the right end of the front cross beam 1 are flat. That is, in the present embodiment, the middle sections of the tubular beam structures that constitute the front cross member 1, the left longitudinal member 3, and the right longitudinal member 4 are circular tubes, and the cross sections (i.e., the middle sections) are circular; and in this embodiment, the back sub vehicle frame pass through the rear end of left longeron 3 the rear end of right longeron 4 and the left end and the right-hand member of front beam 1 are installed on the automobile body, consequently, at the rear end of left longeron 3 the rear end of right longeron 4 and the cross-section of the left end of front beam 1 and right-hand member is designed for the platykurtic to satisfy the installation requirement.
In one embodiment, as shown in fig. 1 and 2, the rear end of the left longitudinal beam 3, the rear end of the right longitudinal beam 4, and the left end and the right end of the front cross beam 1 are provided with mounting holes (not shown); the rear end of the left longitudinal beam 3, the rear end of the right longitudinal beam 4 and the left end and the right end of the front cross beam 1 are connected with the vehicle body through mounting sleeves 11 or bushings penetrating through the mounting holes.
That is, in this embodiment, through the rear end of left longeron 3, the rear end of right longeron 4 and the mounting hole of front beam 1's left end and right-hand member design will installation sleeve 11 (installation sleeve 11 is cavity type cylinder structure, and installation sleeve 11 welds on the top or the inner wall of mounting hole, and the bolt passes the inside and the automobile body connection of installation sleeve 11) or bush (the outer lane welding of bush is on the top or the inner wall of mounting hole) is installed on the automobile body for the sub vehicle frame of back.
Understandably, in the invention, at the design initial stage of the rear subframe, the pipe diameters of the front cross beam 1, the left longitudinal beam 3 and the right longitudinal beam 4 can be planned to meet the design requirements: the designed rear auxiliary frame must simultaneously meet the rigid connection with the automobile body through the mounting sleeve 11 and the soft connection through a bushing; at the moment, if the automobile model with the rear auxiliary frame meets the requirement of comfort, the rear auxiliary frame is installed (flexibly connected) on the automobile body through a bushing so as to improve the comfort; if it is necessary to make the vehicle model with the rear subframe meet the requirements for handling stability, the rear subframe is mounted on the vehicle body by means of a mounting sleeve 11 (i.e. rigid connection, hard connection). Thus, when switching between automobile models corresponding to two different performances (comfort or control stability), only the mounting sleeves 11 and the bushings at the mounting points of the automobile body (namely, the points with the mounting holes at the rear end of the left longitudinal beam 3, the rear end of the right longitudinal beam 4 and the left end and the right end of the front cross beam 1) need to be switched (other parts do not need to be replaced at this time), and different rear subframe molds do not need to be developed again, so that the derivative of a platform product is easy, the parts of the rear subframe have high generalization rate, and therefore, the development period is shortened, the mold investment is reduced, and the cost is saved. Meanwhile, after the automobile body can be connected with the automobile body in a rigid mode through the mounting sleeve 11 and a flexible connection mode through the bushing, the transverse span between the rear auxiliary frame and the automobile body mounting point can be designed to be a fixed value, so that the interface between the rear auxiliary frame and the automobile body is formed into a platform, the platform derivation of the automobile body and the rear auxiliary frame is facilitated, the convenience is brought to the development of new products, the product development efficiency is further improved, the development period is shortened, and the product development investment is reduced.
Specifically, in order to allow for application switching of the corresponding mounting sleeve 11 and the bushing to adapt to different vehicle types, diameters of tubular beams corresponding to the front cross beam 1, the left longitudinal beam 3, and the right longitudinal beam 4 may be set first, and at this time, the perimeter of the cross section of the flat shape after the tubular beams at the rear end of the left longitudinal beam 3, the rear end of the right longitudinal beam 4, and the left end and the right end of the front cross beam 1 are flattened is equal to the perimeter of the cross section of the middle portion of the front cross beam 1, the left longitudinal beam 3, and the right longitudinal beam 4, and can be calculated according to the diameters of the tubular beams. In addition, the height of the cross sections of the tubular beams at the rear end of the left longitudinal beam 3, the rear end of the right longitudinal beam 4 and the left end and the right end of the front cross beam 1 must meet the requirement of the installation height of the installation sleeve 11 and the bush, and the distance between the two ends of the installation sleeve 11 and the upper surface and the lower surface of the tubular beams is larger than or equal to 5mm so as to meet the requirement of the height of the welding seam. And the widths of the pipe beams at the rear end of the left longitudinal beam 3, the rear end of the right longitudinal beam 4 and the left end and the right end of the front cross beam 1 also need to meet the arrangement requirement of the bush, so that the bush and the welding positions at the rear end of the left longitudinal beam 3, the rear end of the right longitudinal beam 4 and the left end and the right end of the front cross beam 1 at least have the welding length of 1/2 circumferences, and the welding is firm.
On the other hand, the embodiment of the invention also provides an automobile which comprises the rear auxiliary frame.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A rear auxiliary frame is characterized by comprising a front cross beam, a rear cross beam, a left longitudinal beam, a right longitudinal beam, a left front beam bracket, a right front beam bracket, a left lower swing arm bracket, a right lower swing arm bracket, a left connecting bracket and a right connecting bracket; the left end of the rear cross beam is connected with the rear end of the left longitudinal beam, and the right end of the rear cross beam is connected with the rear end of the right longitudinal beam; the front end of the left longitudinal beam is connected to the left end of the front cross beam, and the front end of the right longitudinal beam is connected to the right end of the front cross beam;
the left toe-in bracket is connected with the lower part of the left end of the front cross beam and the lower part of the front end of the left longitudinal beam; the right front beam bracket is connected with the lower part of the right end of the front cross beam and the lower part of the front end of the right longitudinal beam; the left lower swing arm support is connected with the lower part of the left end of the rear cross beam and the lower part of the rear end of the left longitudinal beam, and the right lower swing arm support is connected with the lower part of the right end of the rear cross beam and the lower part of the rear end of the right longitudinal beam;
the left connecting bracket is connected between the left toe-in bracket and the left lower swing arm bracket; the right connecting support is connected between the right toe-in support and the right lower swing arm support.
2. The rear subframe of claim 1 wherein said left toe bracket includes a left toe front plate and a left toe rear plate connecting said left toe front plate, wherein said left connecting bracket front end and said front cross member left end are each connected to said left toe front plate, and wherein said left connecting bracket front end, said front cross member left end and said left side member front end are each connected to said left toe rear plate;
the right front beam support comprises a right front beam front plate and a right front beam rear plate connected with the right front beam front plate, the front end of the right connecting support is connected with the right front beam front plate and the right front beam rear plate, the front end of the right connecting support and the right end of the front cross beam are connected with the right front beam front plate, and the front end of the right connecting support, the right end of the front cross beam and the front end of the right longitudinal beam are connected with the right front beam rear plate.
3. The rear subframe of claim 1 wherein said left lower swing arm bracket includes a left lower swing arm front plate and a left lower swing arm rear plate connected to said left lower swing arm front plate, wherein a rear end of said left connecting bracket and a left end of said rear cross member are connected to said left lower swing arm front plate, and wherein said left side member is connected to said left lower swing arm rear plate;
the right lower swing arm support comprises a right lower swing arm front plate and a right lower swing arm rear plate connected with the right lower swing arm front plate, the rear end of the right connecting support and the right end of the rear cross beam are connected with the right lower swing arm front plate, and the right longitudinal beam is connected with the right lower swing arm rear plate.
4. The rear subframe of claim 3 wherein the front end of the front left lower swing arm plate is provided with a first flange for connecting to the rear end of the left linking bracket, and the front end of the front right lower swing arm plate is provided with a second flange for connecting to the rear end of the left linking bracket.
5. The rear subframe of claim 4 wherein said rear end of said left connecting bracket is welded to said first flange; the rear end of the right connecting bracket is welded on the second flanging.
6. The rear subframe of claim 1 wherein said front cross member, said left side member and said right side member are tubular beam structures and said rear cross member is a stamped and formed part.
7. The rear subframe of claim 6 wherein said front cross member, said left side member, and said right side member are circular in cross-section at their midpoints; the cross sections of the rear end of the left longitudinal beam, the rear end of the right longitudinal beam and the left end and the right end of the front cross beam are flat.
8. The rear subframe of any one of claims 1 to 7 wherein said rear end of said left side member, said rear end of said right side member, and said left and right ends of said front cross member are provided with mounting holes; the rear end of the left longitudinal beam, the rear end of the right longitudinal beam, and the left end and the right end of the front cross beam are connected with the vehicle body through mounting sleeves or bushings penetrating through the mounting holes.
9. The rear subframe of claim 1 wherein said left and right connecting brackets are C-shaped in cross section.
10. An automobile comprising a rear subframe according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910576407.1A CN112141213A (en) | 2019-06-28 | 2019-06-28 | Rear auxiliary frame and automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910576407.1A CN112141213A (en) | 2019-06-28 | 2019-06-28 | Rear auxiliary frame and automobile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112141213A true CN112141213A (en) | 2020-12-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910576407.1A Pending CN112141213A (en) | 2019-06-28 | 2019-06-28 | Rear auxiliary frame and automobile |
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| Country | Link |
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| CN (1) | CN112141213A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115230815A (en) * | 2022-07-29 | 2022-10-25 | 重庆长安汽车股份有限公司 | Frame type auxiliary frame integrating body part longitudinal beams and vehicle |
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