CN112141213B - Rear subframe and car - Google Patents
Rear subframe and carInfo
- Publication number
- CN112141213B CN112141213B CN201910576407.1A CN201910576407A CN112141213B CN 112141213 B CN112141213 B CN 112141213B CN 201910576407 A CN201910576407 A CN 201910576407A CN 112141213 B CN112141213 B CN 112141213B
- Authority
- CN
- China
- Prior art keywords
- bracket
- swing arm
- lower swing
- longitudinal beam
- toe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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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
-
- 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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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Body Structure For Vehicles (AREA)
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 support of the rear auxiliary frame is connected with the left end lower part of the front cross beam and the front end lower part of the left longitudinal beam, the right front beam support is connected with the right end lower part of the front cross beam and the front end lower part of the right longitudinal beam, the left lower swing arm support is connected with the left end lower part of the rear cross beam and the rear end lower part of the left longitudinal beam, the right lower swing arm support is connected with the right end lower part of the rear cross beam and the rear end lower part of the right longitudinal beam, the left connecting support is connected between the left front beam support and the left lower swing arm support, and the right connecting support is connected between the right front beam support and the right lower swing arm support. The invention improves the structural mode and performance of the rear auxiliary frame while meeting the durability and comfort of the whole automobile, realizes the light weight target, 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 on a road surface can be reduced and transmitted to the automobile body, and meanwhile, the rigidity of the suspension can be improved by the rear auxiliary frame, so that the whole automobile has good durability and comfort.
Because the front beam support and the lower swing arm support have great influence on NVH (noise, vibration and harshness: noise, vibration, harshness) performance and service life of the whole vehicle, the front beam support and the lower swing arm support are very important load transmission structures in an automobile chassis system, and further, when the rear auxiliary frame is designed, the front beam support and the lower swing arm support have relatively high design requirements on structural modes of the rear auxiliary frame and dynamic stiffness and fatigue strength of the front beam support and the lower swing arm support. In the existing rear auxiliary frame, the front beam support and the lower swing arm support are of a cantilever structure generally, and the performance and the light weight requirements of the front beam support and the lower swing arm support of the cantilever structure on the rear auxiliary frame cannot be well met. Specifically, the dynamic stiffness and fatigue strength of the mounting points of the front beam support and the lower swing arm support of the traditional rear auxiliary frame are improved mainly by increasing the cross section of the front and rear cross beams of the rear auxiliary frame and the thickness of the front beam support and the thickness of the lower swing arm support, so that the weight increase and the complicated cross section characteristics of the rear auxiliary frame can be caused, the lightweight requirement can be not met, the production cost can be increased and the production efficiency can be reduced, and the structural mode, the rigidity, the NVH and other performances of the rear auxiliary frame are improved undesirably (the rigidity is improved by about 50 percent, and the structural mode is improved by about 30 HZ).
Disclosure of Invention
The invention aims to solve the technical problem that the performance and the light weight requirements of a rear auxiliary frame of an automobile cannot be well considered in the prior art, and provides the rear auxiliary frame and the automobile.
In order to solve the technical problems, on the one hand, the embodiment of the invention provides a rear auxiliary frame which comprises 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, wherein 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 left front beam bracket is connected with the left end lower part of the front cross beam and the front end lower part of the left longitudinal beam, the right front beam bracket is connected with the right end lower part of the front cross beam and the front end lower part of the right longitudinal beam, the left lower swing arm bracket is connected with the left end lower part of the rear cross beam and the rear end lower part of the left longitudinal beam, and the right lower swing arm bracket is connected with the right end lower part of the rear cross beam and the rear end lower part of the right longitudinal beam;
the left connecting bracket is connected between the left front beam bracket and the left lower swing arm bracket, and the right connecting bracket is connected between the right front beam bracket and the right lower swing arm bracket.
Optionally, the left front beam bracket includes a left front beam front plate and a left front beam rear plate connected with the left front beam 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 front beam 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 front beam rear plate;
The right toe-in bracket comprises a right toe-in front plate and a right toe-in rear plate connected with the right toe-in front plate, the front end of the right connecting bracket is connected with the right toe-in front plate and the right toe-in rear plate, the front end of the right connecting bracket and the right end of the front cross beam are both connected with the right toe-in front plate, and the front end of the right connecting bracket, the right end of the front cross beam and the front end of the right longitudinal beam are both connected with the right toe-in rear plate.
Optionally, the left lower swing arm bracket 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 bracket 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 flanging used for being connected with the rear end of the left connecting bracket, and the front end of the right lower swing arm front plate is provided with a second flanging used for being connected with the rear end of the left connecting bracket.
Optionally, the rear end of the left connecting bracket is welded on the first turning edge, and the rear end of the right connecting bracket is welded on the second turning edge.
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 stamping forming piece.
Optionally, the middle sections of the front cross beam, the left longitudinal beam and the right longitudinal beam are round, and the 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, the rear end of the left longitudinal beam, the rear end of the right longitudinal beam, the left end and the right end of the front cross beam are respectively provided with a mounting hole, and the rear end of the left longitudinal beam, the rear end of the right longitudinal beam, the left end and the right end of the front cross beam are respectively connected with a vehicle body through a mounting sleeve or a bushing penetrating through the mounting holes.
Optionally, the cross section of the left connecting bracket and the right connecting bracket is C-shaped.
According to the rear auxiliary frame, the left end of the rear cross beam is connected with the rear end of the left longitudinal beam, 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, the front end of the right longitudinal beam is connected with the right lower portion of the left end of the front cross beam and the front lower portion of the left longitudinal beam, the right front beam is connected with the right lower portion of the front cross beam and the front lower portion of the right longitudinal beam, the left lower swing arm is connected with the left lower portion of the rear cross beam and the rear lower portion of the right longitudinal beam, and the right lower swing arm is connected with the right lower portion of the rear cross beam and the rear lower portion of the right longitudinal beam.
Meanwhile, the left connecting bracket is connected between the left front beam bracket and the left lower swing arm bracket, and the right connecting bracket is connected between the right front beam bracket and the right lower swing arm bracket. Therefore, the rear auxiliary frame of the automobile comprises a front beam support (comprising a left front beam support and a right front beam support) and a lower swing arm support (comprising a left lower swing arm support and a right lower swing arm support) which form two end supporting structures 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 60 HZ) of the rear auxiliary frame and the dynamic stiffness value (the stiffness is improved by about 200 percent) of the mounting points of the front beam support and the lower swing arm support, the NVH performance is further improved, the supporting capacity, the strength and the fatigue life of the rear auxiliary frame are obviously improved, the platformization derivatization capacity of the rear auxiliary frame is improved, the requirements of the durability, the comfort, the whole automobile strength and the stiffness characteristics of the whole automobile are ensured, the thickness of the front beam support and the lower swing arm support are reduced, the light-weight target is realized, the production cost is also 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 dies 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 an embodiment of the present invention.
Fig. 2 is a left side view of a rear subframe according to an embodiment of the present invention.
Reference numerals in the specification are as follows:
1. Front cross beam, rear cross beam, left longitudinal beam, right longitudinal beam, left front beam bracket, left front beam front plate, left front beam rear plate, right front beam bracket, right front beam front plate, 62 front beam rear plate, 7 lower left swing arm bracket, 71 lower left swing arm front plate, 72 lower left swing arm rear plate, 8 lower right swing arm bracket, 81 lower right swing arm front plate, 82 lower right swing arm rear plate, 83, second flanging, 9 left connecting bracket, 10 right connecting bracket, 11 mounting sleeve.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects solved by the invention more clear, the 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 for purposes of illustration only and are not intended to limit the scope of the invention.
It is to be understood that the terms "upper," "lower," "front," "rear," "left," "right," "middle," and the like indicate or relate to an orientation or position based on that shown in the drawings, and are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element in question must have a specific orientation, be constructed and operated in a specific orientation, and thus should not 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, and fig. 2 is a left side view of the rear subframe according to an 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 upside down with its position mounted on the automobile, and in this case, the "left" in the present invention refers to the right side 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" refers to the left side 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.); "front" is the upper part of the rear subframe shown in fig. 1 (for example, the front cross member 1, the left front beam bracket 5, the right front beam bracket 6, the front end of the left side member 3, the front end lower part of the right side member 4, the front end lower part of the left side member 3, etc.), the "rear" is the lower part of the rear subframe shown in fig. 1 (for example, the rear cross member 2), the "upper" is the left part of the rear subframe shown in fig. 2, and the "lower" is the right part of the rear subframe shown in fig. 2 (for example, the left lower swing arm bracket 7, the right lower swing arm bracket 8, the left end lower part of the front cross member 1, the front end lower part of the left side member 3, the right end lower part of the front cross member 1, the front end lower part 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 member 1, a rear cross member 2, a left side member 3, a right side member 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, wherein the left end of the rear cross member 2 is connected to the rear end of the left side member 3, the right end of the rear cross member 2 is connected to the rear end of the right side member 4, the front end of the left side member 3 is connected to the left end of the front cross member 1, and the front end of the right side member 4 is connected to the right end of the front cross member 1, and preferably, the left side member 3 and the right side member 4 are symmetrically arranged. Further, the connection manner among the front cross member 1, the rear cross member 2, the left side member 3, and the right side member 4 includes, but is not limited to, welding.
The left front beam bracket 5 is connected with the left end lower part of the front cross beam 1 and the front end lower part of the left longitudinal beam 3, the right front beam bracket 6 is connected with the right end lower part of the front cross beam 1 and the front end lower part of the right longitudinal beam 4, so that the connection (preferably welding) between the front cross beam 1 and the left longitudinal beam 3 and the right longitudinal beam 4 is more stable, and the rear subframe performance is improved. Preferably, the left and right toe brackets 5, 6 are stamped and formed structural members to meet the strength and rigidity requirements.
The left lower swing arm bracket 7 is connected with the lower left end of the rear cross beam 2 and the lower rear end of the left longitudinal beam 3, the right lower swing arm bracket 8 is connected with the lower right end of the rear cross beam 2 and the lower rear end of the right longitudinal beam 4, so that the connection (preferably welding) between the left lower swing arm bracket 7 and the right lower swing arm bracket 8 and the rear cross beam 2, the left longitudinal beam 3 and the right longitudinal beam 4 is more stable, and the performance of the rear auxiliary frame is improved. Preferably, the left lower swing arm bracket 7 and the right lower swing arm bracket 8 are formed by stamping steel plates so as to meet the strength and rigidity requirements.
The left connecting bracket 9 is connected (preferably welded) between the left toe-in bracket 5 and the left lower swing arm bracket 7, and the right connecting bracket 10 is connected (preferably welded) between the right toe-in bracket 6 and the right lower swing arm bracket 8. In an embodiment, as shown in fig. 1 and 2, the front end of the left connecting bracket 9 is connected to the lower portion of the left front beam bracket 5, the rear end of the left connecting bracket 9 is connected to the front end of the left lower swing arm bracket 7, the front end of the right connecting bracket 10 is connected to the lower portion of the right front beam bracket 6, and the rear end of the right connecting bracket 10 is connected to the front end of the right lower swing arm bracket 8, but 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 2, for example, the front end of the left connecting bracket 9 (the right connecting bracket 10 is the same as the above) may be connected to the side wall of the left front beam bracket 5, as long as the requirements of performance, light weight and the like can be satisfied. Preferably, the cross sections of the left connecting bracket 9 and the right connecting bracket 10 are C-shaped, and the left connecting bracket 9 and the right connecting bracket 10 are formed by stamping steel plates to meet the strength and rigidity requirements, and as can be appreciated, the left connecting bracket 9 and the right connecting bracket 10 which are formed by stamping to have the C-shaped cross sections can better meet the requirement of light weight compared with a tubular beam structure, and the mounting process of the tubular beam structure is simpler.
According to the rear auxiliary frame of 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 firmly connected, so that the requirements of the durability, the comfort, the strength and the rigidity of the whole automobile 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 front beam bracket 5, 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 front beam bracket 6, and 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 auxiliary frame in the invention enables the front beam bracket (comprising the left front beam bracket 5 and the right front beam bracket 6) and the lower swing arm bracket (comprising the left lower swing arm bracket 7 and the right lower swing arm bracket 8) to form two end support structures through the connecting bracket, so that the Y-direction span of the connecting bracket obviously improves the first-order torsion mode and the first-order bending mode (the structural mode is improved by about 60 HZ) of the rear auxiliary frame and the dynamic stiffness value (the stiffness is improved by about 200 percent) of the mounting points of the front beam bracket and the lower swing arm bracket, further improves the NVH performance, and simultaneously obviously improves the supporting capacity, the strength and the fatigue life of the rear auxiliary frame, ensures the requirements of the durability, the comfort, the strength and the stiffness characteristics of the whole automobile of the rear auxiliary frame, simultaneously reduces the thickness of the front beam bracket and the lower swing arm bracket, realizes the light-weight target, reduces the production cost and improves the production efficiency. Meanwhile, the invention has the advantages of simple structure, simple manufacturing process, high production efficiency, less investment of dies and development cost and short development period.
In an embodiment, as shown in fig. 1 and 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 member 1 are connected to the left toe front plate 51, the front end of the left connecting bracket 9, the left end of the front cross member 1 and the front end of the left side member 3 are connected to the left toe rear plate 52, the right toe bracket 6 includes a right toe front plate 61 and a right toe rear plate 62 connected to the right toe front plate 61, the front end of the right connecting bracket 10 is connected to the right toe front plate 61 and the right toe rear plate 62, the front end of the right connecting bracket 10 and the right end of the front cross member 1 are connected to the right toe front plate 61, and the front end of the front cross member 1 and the right end of the right side member 4 are connected to the toe rear plate 62.
It is understood that, since the left and right front beam brackets 5 and 6 are mounting points, the dynamic stiffness and fatigue strength requirements are high, if the left and right front beam brackets 5 and 6 are only integrally formed by stamping, at this time, the left and right front beam brackets 5 and 6 cannot form a closed cross section (at most, only a C-shaped cross section can be formed), at this time, the cross-sectional strength of the left and right front beam brackets 5 and 6 cannot be ensured, while in the present embodiment, the left, right and left front beam plates 51, 52, 61 and 62 are all sheet-type stamped parts, the sheet-type stamping process is simpler than the integral forming process, and the left and right front beam brackets 5, 61 and 62 are formed after welding, and the left and right front beam brackets 5,6 can be formed more simply by the stamping process under the condition that the closed cross-sectional strength is ensured. It is to be understood that, 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 member 1, the left side member 3, and the right side member 4 may be changed as required, as long as it is possible to form a closed structure between the left front beam bracket 5 and the left side member 3 and the front cross member 1, between the right front beam bracket 6 and the right side member 4, and between the front cross member 1 (at this time, the left front beam bracket 5 and the right front beam bracket 6 each form a closed cross section) to enhance the rigidity and the load-carrying capacity of the left front beam bracket 5 and the right front beam bracket 6.
In an 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, the left side member 3 is connected to the left lower swing arm rear plate 72, the right lower swing arm bracket 8 includes a right lower swing arm front plate 81 and a right lower swing arm rear plate 82 connected to the right lower swing arm front plate 81, the rear end of the right connecting bracket 10 and the right end of the rear cross member 2 are connected to the right lower swing arm front plate 81, and the right side member 4 is connected to the right lower swing arm rear plate 82.
As can be appreciated, since the left lower swing arm bracket 7 and the right lower swing arm bracket 8 are mounting points, the dynamic stiffness and fatigue strength requirements for the parts are very high, if the left lower swing arm bracket 7 and the right lower swing arm bracket 8 are only formed by integral stamping, at this time, the left lower swing arm bracket 7 and the right lower swing arm bracket 8 which are formed by stamping cannot form a closed section (at most only can form a C-shaped section), at this time, the section strength of the left lower swing arm bracket 7 and the right lower swing arm bracket 8 cannot be ensured, while 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 sheet-type stamping forming parts, the sheet-type stamping process is simpler than the integral stamping process, and the left lower swing arm bracket 7, the right lower swing arm front plate 81 and the right lower swing arm rear plate 82 are formed into the right lower swing arm bracket 8 after being welded, so that the left lower swing arm bracket 7 and the right lower swing arm bracket 8 can be made to be simpler than the stamping process under the condition that the closed section is ensured to ensure the strength. It will be appreciated that 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 side member 3 and the right side member 4 may be changed according to the need, for example, in the present invention, the left lower swing arm bracket 7 and the right lower swing arm bracket 8 may not be connected with the left side member 3 and/or the right side member 4 if the installation boundary conditions, the corresponding positions of the installation and the weight requirements have indicated that the left lower swing arm bracket 7 does not need to be connected with the left side member 3, the right lower swing arm bracket 8 and the right side member 4.
In an 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 with 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 with the rear end of the left connecting bracket 9. The shape of the first and second flanges 83 may be set as desired. Preferably, the rear end of the left connecting bracket 9 is welded to the first flange, and the rear end of the right connecting bracket 10 is welded to the second flange 83. As can be appreciated, as shown in fig. 2, the second flange 83 (the first flange is the same as the second flange) is wrapped around the outer periphery of the rear end of the right connecting bracket 10, and finally the outer periphery of the rear end of the right connecting bracket 10 is welded on the inner side wall of the second flange 83, so that the welding area of the second flange and the second flange is larger, and the connection is more stable.
In an embodiment, as shown in fig. 1 and 2, the front cross member 1, the left side member 3 and the right side member 4 are all tubular beam structures, and the rear cross member 2 is a press-formed member. That is, the front cross beam 1, the left longitudinal beam 3 and the right longitudinal beam 4 are of a pipe beam structure formed by bending steel pipes, so that the three are simple in process forming and convenient to process. The rear auxiliary frame is connected with the automobile body through a front cross beam 1, a left longitudinal beam 3 and a right longitudinal beam 4. Therefore, in the initial design stage of the rear auxiliary frame, the pipe diameters of the front cross beam 1, the left longitudinal beam 3 and the right longitudinal beam 4 can be planned, so that the pipe diameters after planning meet the design requirements. For example, the pipe diameters of the front cross beam 1, the left longitudinal beam 3 and the right longitudinal beam 4 of the designed rear auxiliary frame meet the following design requirements that the designed rear auxiliary frame is required to meet the requirements of rigid connection with the automobile body through the mounting sleeve 11 and flexible connection through the bushing, so that when the rear auxiliary frame is applied to the automobile with different performance, the connection mode between the rear auxiliary frame and the automobile body (through the mounting sleeve 11 or bushing connection) is only required to be switched, the rear auxiliary frame is not required to be redeveloped, and the platform derivation of the rear auxiliary frame is easier, and the universality rate is higher. Meanwhile, the left lower swing arm support 7 and the right lower swing arm support 8 are both installed on the rear cross beam 2, and the supporting force required to be born on the rear cross beam 2 is larger, so that the rear cross beam 2 is designed into a stamping forming piece, and the requirements for light weight (compared with a tubular beam structure, the weight of the tubular beam structure can be lighter under the condition of the same bearing capacity) can be met while enough supporting effect is provided.
In an embodiment, as shown in fig. 1 and 2, the cross sections of the front cross member 1, the left side member 3 and the right side member 4 are circular, and the cross sections of the rear end of the left side member 3, the rear end of the right side member 4 and the left and right ends of the front cross member 1 are flat. That is, in the present embodiment, the middle section of the tubular beam structure constituting the front side member 1, the left side member 3 and the right side member 4 is a circular tube and the cross section (i.e., the middle cross section) is circular, and in the present embodiment, the rear sub frame is mounted on the vehicle body through the rear end of the left side member 3, the rear end of the right side member 4 and the left and right ends of the front side member 1, and therefore, the cross sections at the rear end of the left side member 3, the rear end of the right side member 4 and the left and right ends of the front side member 1 are designed to be flat to meet the mounting requirements.
In an embodiment, as shown in fig. 1 and 2, the rear end of the left side member 3, the rear end of the right side member 4, and the left and right ends of the front cross member 1 are provided with mounting holes (not shown), and the rear end of the left side member 3, the rear end of the right side member 4, and the left and right ends of the front cross member 1 are connected to the vehicle body through mounting bushings 11 or bushings passing through the mounting holes.
That is, in the present embodiment, the rear sub frame mounting sleeve 11 (the mounting sleeve 11 is of a hollow cylindrical structure, the mounting sleeve 11 is welded to the top or inner wall of the mounting hole, and a bolt is connected to the vehicle body through the inside of the mounting sleeve 11) or the bush (the outer ring of the bush is welded to the top or inner wall of the mounting hole) is mounted on the vehicle body through the mounting holes designed in the rear end of the left side member 3, the rear end of the right side member 4, and the left and right ends of the front cross member 1.
It can be understood that in the invention, in the initial design 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 requirement, namely, the designed rear subframe must be simultaneously and rigidly connected with the automobile body through the mounting sleeve 11 and flexibly connected through the bushing, at the moment, if the automobile model with the rear subframe is required to meet the comfort requirement, the rear subframe is mounted (flexibly connected) on the automobile body through the bushing so as to improve the comfort, and if the automobile model with the rear subframe is required to meet the control stability requirement, the rear subframe is mounted on the automobile body through the mounting sleeve 11 (namely, rigidly connected and rigidly connected). In this way, when switching between automobile types corresponding to two different performances (comfort or control stability), only the mounting sleeve 11 and the bushing at the mounting point of the automobile body (namely, the points with mounting holes at the rear end of the left longitudinal beam 3, the rear end of the right longitudinal beam 4 and the left and right ends of the front cross beam 1) are required to be switched (other parts do not need to be replaced at this time), and different rear auxiliary frame molds are not required to be redeveloped, so that the platform product is easy to derive, the part universalization rate of the rear auxiliary frame is higher, the development period is shortened, the mold investment is reduced, and the cost is saved. Meanwhile, after the two connecting modes of rigid connection with the automobile body through the mounting sleeve 11 and soft connection through the bushing can be met, the transverse span between the rear auxiliary frame and the mounting point of the automobile body can be designed to be a fixed value, so that the interface between the rear auxiliary frame and the automobile body is flattened, the flattening derivation of the automobile body and the rear auxiliary frame is facilitated, convenience is brought to the development of new products, the development efficiency of the products is further improved, the development period is shortened, and the development investment of the products is reduced.
Specifically, in order to make compatible the application switching of the installation sleeve 11 and the bushing corresponding to different vehicle types, the diameters of the front cross beam 1, the left longitudinal beam 3 and the right longitudinal beam 4 corresponding to each other may be set first, and at this time, the circumferences of the flat cross sections of the rear end of the left longitudinal beam 3, the rear end of the right longitudinal beam 4 and the left and right end of the front cross beam 1 after being flattened may be equal to the circumferences of the middle cross sections of the front cross beam 1, the left longitudinal beam 3 and the right longitudinal beam 4 and may be calculated according to the diameters of the tube beams. In addition, the heights 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 required to meet the requirement of the installation height of the installation sleeve 11 and the bushing, and the distance between the two ends of the installation sleeve 11 and the upper surface and the lower surface of the pipe beam is required to be more than or equal to 5mm so as to meet the requirement of the height of the welding seam. And the rear end of the left longitudinal beam 3, the rear end of the right longitudinal beam 4 and the left and right tubular beam widths of the front cross beam 1 also need to meet the arrangement requirements of the bushings at the same time, so that the welding positions of the bushings and the rear end of the left longitudinal beam 3, the rear end of the right longitudinal beam 4 and the left and right ends of the front cross beam 1 have a welding length of at least 1/2 perimeter, so that the welding is firm.
On the other hand, the embodiment of the invention also provides an automobile, which comprises the rear auxiliary frame.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910576407.1A CN112141213B (en) | 2019-06-28 | 2019-06-28 | Rear subframe and car |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910576407.1A CN112141213B (en) | 2019-06-28 | 2019-06-28 | Rear subframe and car |
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| CN112141213B true CN112141213B (en) | 2025-08-08 |
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| CN115230815A (en) * | 2022-07-29 | 2022-10-25 | 重庆长安汽车股份有限公司 | A frame type subframe and vehicle integrating longitudinal beams of body parts |
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|---|---|---|---|---|
| CN103847793A (en) * | 2012-11-30 | 2014-06-11 | 广州汽车集团股份有限公司 | Vehicular rear auxiliary frame and corresponding vehicle |
| CN206358218U (en) * | 2016-12-29 | 2017-07-28 | 江铃汽车股份有限公司 | A kind of vehicle auxiliary frame structure |
| CN210526646U (en) * | 2019-06-28 | 2020-05-15 | 广州汽车集团股份有限公司 | Rear subframe and car |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201520178U (en) * | 2009-10-14 | 2010-07-07 | 奇瑞汽车股份有限公司 | Modular automotive suspension |
| CN104554444B (en) * | 2014-12-03 | 2017-12-12 | 浙江福多纳汽车部件有限公司 | Automobile rear sub-frame |
| JP6269636B2 (en) * | 2015-11-10 | 2018-01-31 | マツダ株式会社 | Rear subframe structure |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103847793A (en) * | 2012-11-30 | 2014-06-11 | 广州汽车集团股份有限公司 | Vehicular rear auxiliary frame and corresponding vehicle |
| CN206358218U (en) * | 2016-12-29 | 2017-07-28 | 江铃汽车股份有限公司 | A kind of vehicle auxiliary frame structure |
| CN210526646U (en) * | 2019-06-28 | 2020-05-15 | 广州汽车集团股份有限公司 | Rear subframe and car |
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