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
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- 238000000034 method Methods 0.000 description 12
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- 238000011161 development Methods 0.000 description 7
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000005452 bending Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000012356 Product development Methods 0.000 description 2
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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
Description
技术领域technical field
本发明属于汽车底盘技术领域,尤其涉及一种后副车架及汽车。The invention belongs to the technical field of automobile chassis, and in particular relates to a rear subframe and an automobile.
背景技术Background technique
汽车的后副车架是汽车底盘系统中非常重要的构件,后副车架连接车身和悬架等零部件,可减少路面的振动及噪声等激励向车身传递,同时后副车架还可以提高悬架的刚度,以使得整车具有较好的耐久和舒适性。The rear subframe of the car is a very important component in the chassis system of the car. The rear subframe connects the body and the suspension and other parts, which can reduce the transmission of vibration and noise from the road to the body. At the same time, the rear subframe can also improve the The stiffness of the suspension, so that the vehicle has better durability and comfort.
由于前束支架和下摆臂支架对整车的NVH(噪声、振动与声振粗糙度:Noise、Vibration、Harshness)性能和寿命有很大的影响,因此前束支架和下摆臂支架是汽车底盘系统中十分重要的载荷传递结构,进而,在设计后副车架时,对于后副车架的结构模态,以及前束支架和下摆臂支架的动刚度与疲劳强度均有比较高的设计要求。现有的后副车架中,前束支架和下摆臂支架通常为悬臂结构,而悬臂结构的前束支架和下摆臂支架对后副车架的性能和轻量化要求无法得到很好兼顾。具体地,现有后副车架的模态、前束支架和下摆臂支架的安装点的动刚度和疲劳强度的提高,主要是通过增大后副车架前后横梁截面以及前束支架和下摆臂支架的板厚来实现,如此,会导致后副车架的重量增加和截面特征复杂,不利于满足轻量化要求,同时会导致生产成本的升高和生产效率的降低,且该方案对后副车架的结构模态以及刚度、NVH等性能的提升亦并不理想(刚度提升50%左右,结构模态提升约30HZ)。Since the toe-in bracket and the swing arm bracket have a great influence on the NVH (Noise, Vibration and Harshness: Noise, Vibration, Harshness) performance and life of the vehicle, the toe-in bracket and the swing arm bracket are the vehicle chassis system. Therefore, when designing the rear subframe, there are relatively high design requirements for the structural mode of the rear subframe, as well as the dynamic stiffness and fatigue strength of the toe-in bracket and the lower swing arm bracket. In the existing rear subframe, the toe-in bracket and the swing arm bracket are usually cantilever structures, and the toe-in bracket and the swing arm bracket of the cantilever structure cannot well take into account the performance and lightweight requirements of the rear subframe. Specifically, the modalities of the existing rear subframe, the dynamic stiffness and fatigue strength of the mounting points of the toe-in bracket and the lower swing arm bracket are improved, mainly by increasing the cross-section of the front and rear cross-members of the rear subframe, as well as the toe-in bracket and the lower swing arm bracket. The thickness of the arm bracket is used to achieve this, which will lead to an increase in the weight of the rear subframe and complex cross-sectional characteristics, which is not conducive to meeting the lightweight requirements, and will also lead to an increase in production costs and a reduction in production efficiency. The improvement of the structural mode of the subframe, stiffness, NVH and other properties is not ideal (the stiffness is increased by about 50%, and the structural mode is increased by about 30HZ).
发明内容SUMMARY OF THE INVENTION
本发明所要解决的技术问题是:针对现有技术中,汽车后副车架的性能和轻量化要求无法得到很好兼顾的问题,提供一种后副车架及汽车。The technical problem to be solved by the present invention is to provide a rear subframe and an automobile in view of the problem in the prior art that the performance and light weight requirements of the rear subframe of an automobile cannot be well balanced.
为解决上述技术问题,一方面,本发明实施例提供一种后副车架,包括前横梁、后横梁、左纵梁、右纵梁、左前束支架、右前束支架、左下摆臂支架、右下摆臂支架、左连接支架和右连接支架;所述后横梁的左端连接所述左纵梁的后端,所述后横梁的右端连接所述右纵梁的后端;所述左纵梁的前端连接在所述前横梁的左端,所述右纵梁的前端连接在所述前横梁的右端;In order to solve the above technical problems, on the one hand, an embodiment of the present invention provides a rear subframe, which includes a front beam, a rear 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 a lower swing arm bracket, a left connecting bracket and a right connecting bracket; the left end of the rear cross beam is connected to the rear end of the left longitudinal beam, and the right end of the rear cross beam is connected to the rear end of the right longitudinal beam; The front end is connected to the left end of the front cross member, and the front end of the right longitudinal beam is connected to the right end of the front cross member;
所述左前束支架连接所述前横梁的左端下部以及所述左纵梁的前端下部;所述右前束支架连接所述前横梁的右端下部以及所述右纵梁的前端下部;所述左下摆臂支架连接所述后横梁的左端下部以及所述左纵梁的后端下部,所述右下摆臂支架连接所述后横梁的右端下部以及所述右纵梁的后端下部;the left toe-in bracket is connected to the lower left end of the front cross member and the lower front end of the left longitudinal beam; the right toe-in bracket is connected to the lower right end of the front cross member and the lower front end of the right longitudinal beam; the left hem The arm bracket is connected to the lower left end of the rear cross beam and the lower rear end of the left longitudinal beam, and the right lower swing arm bracket is connected to the lower right end of the rear cross beam and the lower rear end of the right longitudinal beam;
所述左连接支架连接在所述左前束支架与所述左下摆臂支架之间;所述右连接支架连接在所述右前束支架与所述右下摆臂支架之间。The left connecting bracket is connected between the left toe-in bracket and the left lower swing arm bracket; the right connection bracket is connected between the right toe-in bracket and the right lower swing arm bracket.
可选地,所述左前束支架包括左前束前板和连接所述左前束前板的左前束后板,所述左连接支架的前端和所述前横梁的左端均连接所述左前束前板,所述左连接支架的前端、所述前横梁的左端和所述左纵梁的前端均连接所述左前束后板;Optionally, the left toe-in bracket includes a left toe-in front plate and a left toe-in rear plate connected to the left toe-in front plate, and the front end of the left connecting bracket and the left end of the front beam are both connected to the left toe-in front plate. , the front end of the left connecting bracket, the left end of the front cross member and the front end of the left longitudinal beam are all connected to the left toe-in rear plate;
所述右前束支架包括右前束前板和连接所述右前束前板的右前束后板,所述右连接支架的前端连接所述右前束前板和所述右前束后板,所述右连接支架的前端和所述前横梁的右端均连接所述右前束前板,所述右连接支架的前端、所述前横梁的右端和所述右纵梁的前端均连接所述右前束后板。The right toe-in bracket includes a right toe-in front plate and a right toe-in rear plate connected to the right toe-in front plate, the front end of the right connecting bracket is connected to the right toe-in front plate and the right toe-in rear plate, and the right connection bracket is connected to the right toe-in front plate and the right toe-in rear plate. The front end of the bracket and the right end of the front cross member are connected to the right toe-in front plate, and the front end of the right connecting bracket, the right end of the front cross member and the front end of the right longitudinal beam are all connected to the right toe-in rear plate.
可选地,所述左下摆臂支架包括左下摆臂前板和连接所述左下摆臂前板的左下摆臂后板,所述左连接支架的后端和所述后横梁的左端连接所述左下摆臂前板,所述左纵梁连接所述左下摆臂后板;Optionally, the left lower arm bracket includes a left lower arm front plate and a left lower arm rear plate connected to the left lower arm front plate, and the rear end of the left connection bracket and the left end of the rear beam are connected to the the left lower swing arm front plate, the left longitudinal beam is connected to the left lower swing arm rear plate;
所述右下摆臂支架包括右下摆臂前板和连接所述右下摆臂前板的右下摆臂后板,所述右连接支架的后端和所述后横梁的右端连接所述右下摆臂前板,所述右纵梁连接所述右下摆臂后板。The right lower swing arm bracket includes a right lower swing arm front plate and a right lower swing arm rear plate connected to the right lower swing arm front plate, and the rear end of the right connecting bracket and the right end of the rear beam are connected to the right lower swing arm front plate. and the right longitudinal beam is connected to the right lower swing arm rear plate.
可选地,所述左下摆臂前板的前端设有用于连接所述左连接支架的后端的第一翻边,所述右下摆臂前板的前端设有用于连接所述左连接支架的后端的第二翻边。Optionally, the front end of the left lower swing arm front plate is provided with a first flange for connecting to the rear end of the left connecting bracket, and the front end of the right lower swing arm front plate is provided with a rear end for connecting to the left connecting bracket. the second flange at the end.
可选地,所述左连接支架的后端焊接在所述第一翻边上;所述右连接支架的后端焊接在所述第二翻边上。Optionally, the rear end of the left connecting bracket is welded on the first flange; the rear end of the right connecting bracket is welded on the second flange.
可选地,所述前横梁、所述左纵梁和所述右纵梁均为管梁结构,所述后横梁为冲压成型件。Optionally, the front transverse beam, the left longitudinal beam and the right longitudinal beam are all tubular beam structures, and the rear transverse beam is a stamped and formed part.
可选地,所述前横梁、所述左纵梁和所述右纵梁的中部截面为圆形;所述左纵梁的后端、所述右纵梁的后端以及所述前横梁的左端和右端的截面呈扁平状。Optionally, the cross-section of the middle of the front cross member, the left side member and the right side member is circular; the rear end of the left side member, the rear end of the right side member and the front cross member are The cross-sections of the left and right ends are flat.
可选地,所述左纵梁的后端、所述右纵梁的后端以及所述前横梁的左端和右端均设有安装孔;所述左纵梁的后端、所述右纵梁的后端以及所述前横梁的左端和右端均通过穿过所述安装孔的安装套管或衬套连接车身。Optionally, the rear end of the left longitudinal beam, the rear end of the right longitudinal beam, and the left and right ends of the front cross beam are all provided with mounting holes; the rear end of the left longitudinal beam, the right longitudinal beam The rear end of the front cross member and the left and right ends of the front cross member are connected to the vehicle body through mounting sleeves or bushings passing through the mounting holes.
可选地,所述左连接支架和所述右连接支架的截面为C形。Optionally, the cross-sections of the left connecting bracket and the right connecting bracket are C-shaped.
根据发明实施例的后副车架,后横梁的左端连接左纵梁的后端,后横梁的右端连接右纵梁的后端;左纵梁的前端连接在前横梁的左端,右纵梁的前端连接在前横梁的右端;左前束支架连接前横梁的左端下部以及左纵梁的前端下部;右前束支架连接前横梁的右端下部以及右纵梁的前端下部;左下摆臂支架连接后横梁的左端下部以及左纵梁的后端下部,右下摆臂支架连接后横梁的右端下部以及右纵梁的后端下部;如此,前横梁、后横梁、左纵梁、右纵梁、左前束支架、右前束支架、左下摆臂支架和右下摆臂支架之间的连接稳固,可以满足汽车的整车耐久性、舒适性、整车强度和刚度特性的要求,改善了后副车架性能。According to the rear subframe of the embodiment of the invention, the left end of the rear cross member is connected to the rear end of the left side member, the right end of the rear cross member is connected to the rear end of the right side member; the front end of the left side member is connected to the left end of the front cross member, and the The front end is connected to the right end of the front beam; the left toe-in bracket is connected to the lower part of the left end of the front beam and the lower part of the front end of the left longitudinal beam; the right toe-in bracket is connected to the lower part of the right end of the front beam and the lower part of the front end of the right longitudinal beam; The lower part of the left end and the lower part of the rear end of the left longitudinal beam, the right lower swing arm bracket is connected to the lower part of the right end of the rear beam and the lower part of the rear end of the right longitudinal beam; The connection between the right toe-in bracket, the left lower swing arm bracket and the right lower swing arm bracket is stable, which can meet the requirements of vehicle durability, comfort, vehicle strength and rigidity characteristics, and improve the performance of the rear subframe.
同时,左连接支架连接在左前束支架与左下摆臂支架之间;右连接支架连接在右前束支架与右下摆臂支架之间。如此,本发明中的后副车架通过连接支架使得前束支架(包括左前束支架和右前束支架)和下摆臂支架(包括左下摆臂支架和右下摆臂支架)构成两端支撑结构,如此,连接支架的Y向跨距,显著提高了后副车架一阶扭转模态和一阶弯曲模态(结构模态提升约60HZ)以及前束支架和下摆臂支架的安装点的动刚度值(刚度提升200%左右),也进一步提升了NVH性能;同时也显著提升了后副车架的支撑能力、强度和疲劳寿命,使得后副车架的平台化衍生能力变强,也可以在保证汽车的整车耐久性、舒适性、整车强度和刚度特性的要求的同时,减小了前束支架和下摆臂支架的厚度,实现轻量化目标,也降低了生产成本,提升了生产效率。同时,本发明结构简单,制作工艺简单,生产效率高,模具、开发费用投入较少,开发周期短。Meanwhile, the left connecting bracket is connected between the left toe-in bracket and the left lower swing arm bracket; the right connection bracket is connected between the right toe-in bracket and the right lower swing arm bracket. In this way, the rear sub-frame in the present invention makes the toe-in bracket (including the left toe-in bracket and the right toe-in bracket) and the lower swing arm bracket (including the left toe-in bracket and the right lower swing arm bracket) form a support structure at both ends by connecting the brackets, so , connecting the Y-direction span of the bracket, which significantly improves the first-order torsional mode and first-order bending mode of the rear subframe (the structural mode is increased by about 60HZ) and the dynamic stiffness value of the installation point of the toe-in bracket and the lower swing arm bracket (The stiffness is increased by about 200%), which further improves the NVH performance; at the same time, it also significantly improves the support capacity, strength and fatigue life of the rear sub-frame, making the platform-based derivative ability of the rear sub-frame stronger, and it can also be guaranteed. In addition to the requirements of vehicle durability, comfort, vehicle strength and stiffness characteristics, the thickness of the toe-in bracket and the lower swing arm bracket is reduced to achieve the goal of light weight, reduce production costs, and improve production efficiency. At the same time, the invention has simple structure, simple manufacturing process, high production efficiency, less investment in molds and development costs, and short development cycle.
另一方面,本发明实施例还提供一种汽车,其包括上述的后副车架。On the other hand, an embodiment of the present invention also provides an automobile, which includes the above-mentioned rear subframe.
附图说明Description of drawings
图1是本发明一实施例提供的后副车架的主视图。FIG. 1 is a front view of a rear sub-frame provided by an embodiment of the present invention.
图2是本发明一实施例提供的后副车架的左视图。FIG. 2 is a left side view of a rear subframe provided by an embodiment of the present invention.
说明书中的附图标记如下:The reference numbers in the description are as follows:
1、前横梁;2、后横梁;3、左纵梁;4、右纵梁;5、左前束支架;51、左前束前板;52、左前束后板;6、右前束支架;61、右前束前板;62、右前束后板;7、左下摆臂支架;71、左下摆臂前板;72、左下摆臂后板;8、右下摆臂支架;81、右下摆臂前板;82、右下摆臂后板;83、第二翻边;9、左连接支架;10、右连接支架;11、安装套管。1. Front beam; 2. Rear beam; 3. Left longitudinal beam; 4. Right longitudinal beam; 5. Left toe-in bracket; 51. Left toe-in front plate; 52. Left toe-in rear plate; 6. Right toe-in bracket; 61. Right toe-in front plate; 62. Right toe-in rear plate; 7. Left lower-swing arm bracket; 71. Left lower-swing arm front plate; 72. Left lower-swing arm rear plate; 8. Right lower-swing arm bracket; 81. Right lower-swing arm front plate; 82. Right lower swing arm rear plate; 83. Second flange; 9. Left connecting bracket; 10. Right connecting bracket; 11. Installation sleeve.
具体实施方式Detailed ways
为了使本发明所解决的技术问题、技术方案及有益效果更加清楚明白,以下结合附图及实施例,对本发明进行进一步的详细说明。应当理解,此处所描述的具体实施例仅仅用以解释本发明,并不用于限定本发明。In order to make the technical problems, technical solutions and beneficial effects solved by the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.
需要理解的是,术语“上”、“下”、“前”、“后”、“左”、“右”、“中部”等指示的方位或位置关系为基于附图所示的方位或位置关系,仅是为了便于描述本发明和简化描述,而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作,因此不能理解为对本发明的限制。It should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "middle", etc. is based on the orientation or position shown in the drawings The relationship is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.
如图1和图2所示,图1是本发明一实施例提供的后副车架的主视图;图2是本发明一实施例提供的后副车架的左视图。在本发明中,为更好展示图1中的后副车架的结构,图1中所示的后副车架与其安装在汽车上的位置翻转放置,此时,本发明中所指的“左”即为图1所示的后副车架的右方(比如:后横梁2的左端、前横梁1的左端等),“右”即为图1所示的后副车架的左方(比如前横梁1的右端、后横梁2的右端等);“前”即为图1所示的后副车架的上方(比如:前横梁1、左前束支架5、右前束支架6、左纵梁3的前端、右纵梁4的前端、左纵梁3的前端下部、右纵梁4的前端下部等),“后”即为图1所示的后副车架的下方(比如:后横梁2);“上”即为图2的后副车架的左方,“下”即为图2的后副车架的右方(比如:左下摆臂支架7、右下摆臂支架8、前横梁1的左端下部、左纵梁3的前端下部、前横梁1的右端下部、右纵梁4的前端下部等)。As shown in Figures 1 and 2, Figure 1 is a front view of a rear subframe provided by an embodiment of the present invention; Figure 2 is a left side view of a rear subframe provided by an embodiment of the present invention. In the present invention, in order to better show the structure of the rear sub-frame in FIG. 1 , the rear sub-frame shown in FIG. 1 and the position where it is installed on the vehicle are turned over and placed. "Left" is the right side of the rear subframe shown in Figure 1 (for example: the left end of the rear cross member 2, the left end of the front cross member 1, etc.), and "right" is the left side of the rear subframe shown in Figure 1 (such as the right end of the front beam 1, the right end of the rear beam 2, etc.); "front" is the upper part of the rear subframe shown in Figure 1 (for example: front beam 1, left toe-in bracket 5, right toe-in bracket 6, left The front end of the side member 3, the front end of the right side member 4, the lower part of the front end of the left side member 3, the lower part of the front end of the right side member 4, etc.), "rear" is the lower part of the rear subframe shown in Figure 1 (for example: Rear beam 2); "up" is the left side of the rear subframe in Figure 2, and "down" is the right side of the rear subframe in Figure 2 (for example: left lower swing arm bracket 7, right lower swing arm bracket 8 , the lower left end of the front cross member 1, the lower part of the front end of the left side member 3, the lower part of the right end of the front cross member 1, the lower part of the front end of the right side member 4, etc.).
如图1和图2所示,本发明一实施例提供了一种后副车架,包括前横梁1、后横梁2、左纵梁3、右纵梁4、左前束支架5、右前束支架6、左下摆臂支架7、右下摆臂支架8、左连接支架9和右连接支架10;所述后横梁2的左端连接所述左纵梁3的后端,所述后横梁2的右端连接所述右纵梁4的后端;所述左纵梁3的前端连接在所述前横梁1的左端,所述右纵梁4的前端连接在所述前横梁1的右端;作为优选,所述左纵梁3与所述右纵梁4对称设置。进一步地,前横梁1、后横梁2、左纵梁3和右纵梁4之间的连接方式包括但不限定为焊接。As shown in FIG. 1 and FIG. 2, an embodiment of the present invention provides a rear subframe, including a front cross member 1, a
所述左前束支架5连接所述前横梁1的左端下部以及所述左纵梁3的前端下部;所述右前束支架6连接所述前横梁1的右端下部以及所述右纵梁4的前端下部;以使得前横梁1和左纵梁3以及右纵梁4之间的连接(优选为焊接)更为稳固,改善后副车架性能。作为优选,左前束支架5和右前束支架6均为冲压成型结构件,以满足其强度和刚度需求。The left toe-in bracket 5 is connected to the lower left end of the front cross member 1 and the lower front end of the left longitudinal beam 3 ; the right toe-in
所述左下摆臂支架7连接所述后横梁2的左端下部以及所述左纵梁3的后端下部,所述右下摆臂支架8连接所述后横梁2的右端下部以及所述右纵梁4的后端下部;以使得左下摆臂支架7和右下摆臂支架8与后横梁2、左纵梁3和右纵梁4之间的连接(优选为焊接)更为稳固,进而改善后副车架性能。作为优选,左下摆臂支架7和右下摆臂支架8均由钢板冲压成型,以满足其强度和刚度需求。The left lower swing arm bracket 7 is connected to the lower left end of the
所述左连接支架9连接(优选为焊接)在所述左前束支架5与所述左下摆臂支架7之间;所述右连接支架10连接(优选为焊接)在所述右前束支架6与所述右下摆臂支架8之间。在一实施例中,如图1和图2所示,所述左连接支架9的前端连接所述左前束支架5的下部,所述左连接支架9的后端连接所述左下摆臂支架7的前端;所述右连接支架10的前端连接所述右前束支架6的下部;所述右连接支架10的后端连接所述右下摆臂支架8的前端;但本发明中,左连接支架9和右连接支架10的连接方式并不限定于图1和图2中所示,比如,所述左连接支架9(右连接支架10同理)的前端连接所述左前束支架5的侧壁亦可,只要能满足其性能和轻量化等要求即可。作为优选,所述左连接支架9和所述右连接支架10的截面为C形,且所述左连接支架9和所述右连接支架10均由钢板冲压成型,以满足其强度和刚度需求,可理解地,冲压成型为具有C形截面的左连接支架9和所述右连接支架10相比管梁结构,可以更好地满足轻量化要求,且相比管梁结构的安装工艺更为简单。The left connecting bracket 9 is connected (preferably welded) between the left toe-in bracket 5 and the left lower swing arm bracket 7 ; the
根据发明实施例的后副车架,前横梁1、后横梁2、左纵梁3、右纵梁4、左前束支架5、右前束支架6、左下摆臂支架7和右下摆臂支架8之间的连接稳固,可以满足汽车的整车耐久性、舒适性、整车强度和刚度特性的要求,改善了后副车架性能。同时,左连接支架9的前端连接左前束支架5的下部,左连接支架9的后端连接左下摆臂支架7的前端;右连接支架10的前端连接右前束支架6的下部;右连接支架10的后端连接右下摆臂支架8的前端。如此,本发明中的后副车架通过连接支架使得前束支架(包括左前束支架5和右前束支架6)和下摆臂支架(包括左下摆臂支架7和右下摆臂支架8)构成两端支撑结构,如此,连接支架的Y向跨距,显著提高了后副车架一阶扭转模态和一阶弯曲模态(结构模态提升约60HZ)以及前束支架和下摆臂支架的安装点的动刚度值(刚度提升200%左右),也进一步提升了NVH性能;同时也显著提升了后副车架的支撑能力、强度和疲劳寿命,使得后副车架的平台化衍生能力变强,也可以在保证汽车的整车耐久性、舒适性、整车强度和刚度特性的要求的同时,减小了前束支架和下摆臂支架的厚度,实现轻量化目标,也降低了生产成本,提升了生产效率。同时,本发明结构简单,制作工艺简单,生产效率高,模具、开发费用投入较少,开发周期短。According to the rear subframe of the embodiment of the invention, one of the front cross member 1 , the
在一实施例中,如图1和图2所示,所述左前束支架5包括左前束前板51和连接所述左前束前板51的左前束后板52,所述左连接支架9的前端和所述前横梁1的左端均连接所述左前束前板51,所述左连接支架9的前端、所述前横梁1的左端和所述左纵梁3的前端均连接所述左前束后板52;所述右前束支架6包括右前束前板61和连接所述右前束前板61的右前束后板62,所述右连接支架10的前端连接所述右前束前板61和所述右前束后板62,所述右连接支架10的前端和所述前横梁1的右端均连接所述右前束前板61,所述右连接支架10的前端、所述前横梁1的右端和所述右纵梁4的前端均连接所述右前束后板62。In one embodiment, as shown in FIG. 1 and FIG. 2 , the left toe-in bracket 5 includes a left toe-in
可理解地,由于左前束支架5和右前束支架6为安装点,因此,对此处的动刚度和疲劳强度要求很高,若左前束支架5和右前束支架6仅由为一体冲压成型,此时,冲压成型的左前束支架5和右前束支架6中无法构成封闭截面(最多仅能形成C形截面),此时,左前束支架5和右前束支架6截面强度无法得到保证;而在本实施例中,左前束前板51、左前束后板52、右前束前板61和右前束后板62均为分片式的冲压成型件,分片式冲压工艺比一体成型工艺简单,且左前束前板51和左前束后板52焊接之后形成左前束支架5,右前束前板61和右前束后板62焊接之后形成右前束支架6;如此,可以使得左前束支架5和右前束支架6在保证形成封闭截面以保证截面强度的情况下,还使得冲压成型的工艺更为简单。可理解地,在本发明中,左前束支架5(包括左前束前板51和左前束后板52)和右前束支架6(包括右前束前板61和右前束后板62)与前横梁1、左纵梁3和右纵梁4之间的连接方式可以根据需求变更,只要能够使得左前束支架5与左纵梁3以及前横梁1之间、右前束支架6与右纵梁4以及前横梁1之间均形成封闭结构(此时,左前束支架5和右前束支架6均形成封闭截面),以增强左前束支架5和右前束支架6的刚度和承载能力即可。Understandably, since the left toe-in bracket 5 and the right toe-in
在一实施例中,如图1和图2所示,所述左下摆臂支架7包括左下摆臂前板71和连接所述左下摆臂前板71的左下摆臂后板72,所述左连接支架9的后端和所述后横梁2的左端连接所述左下摆臂前板71,所述左纵梁3连接所述左下摆臂后板72;所述右下摆臂支架8包括右下摆臂前板81和连接所述右下摆臂前板81的右下摆臂后板82,所述右连接支架10的后端和所述后横梁2的右端连接所述右下摆臂前板81,所述右纵梁4连接所述右下摆臂后板82。In an embodiment, as shown in FIGS. 1 and 2 , the left lower swing arm bracket 7 includes a left lower swing
可理解地,由于左下摆臂支架7和右下摆臂支架8为安装点,因此,对此处的动刚度和疲劳强度要求很高,若左下摆臂支架7和右下摆臂支架8仅由为一体冲压成型,此时,冲压成型的左下摆臂支架7和右下摆臂支架8中无法构成封闭截面(最多仅能形成C形截面),此时,左下摆臂支架7和右下摆臂支架8截面强度无法得到保证;而在本实施例中,左下摆臂前板71、左下摆臂后板72、右下摆臂前板81和右下摆臂后板82均为分片式的冲压成型件,分片式冲压工艺比一体成型工艺简单,且左下摆臂前板71和左下摆臂后板72焊接之后形成左下摆臂支架7,右下摆臂前板81和右下摆臂后板82焊接之后形成右下摆臂支架8;如此,可以使得左下摆臂支架7和右下摆臂支架8在保证形成封闭截面以保证截面强度的情况下,还使得冲压成型的工艺更为简单。可理解地,在本发明中,左下摆臂支架7(包括左下摆臂前板71和左下摆臂后板72)和右下摆臂支架8(包括右下摆臂前板81和右下摆臂后板82)与后横梁2、左纵梁3和右纵梁4之间的连接方式可以根据需求变更,比如,在本发明中,若安装边界条件、安装的对应的位置和重量要求已表明无需将左下摆臂支架7与左纵梁3、右下摆臂支架8和右纵梁4连接在一起时,左下摆臂支架7和右下摆臂支架8亦可以并不与左纵梁3或/和右纵梁4连接在一起。Understandably, since the left lower swing arm bracket 7 and the right lower
在一实施例中,如图1和图2所示,所述左下摆臂前板71的前端设有用于连接所述左连接支架9的后端的第一翻边(图未示),所述右下摆臂前板81的前端设有用于连接所述左连接支架9的后端的第二翻边83。所述第一翻边和第二翻边83的形状可以根据需求进行设定。作为优选,所述左连接支架9的后端焊接在所述第一翻边上;所述右连接支架10的后端焊接在所述第二翻边83上。可理解地,如图2所示,所述第二翻边83(第一翻边同理)包覆在所述右连接支架10的后端的外周,最终将所述右连接支架10的后端的外周焊接在第二番表白83的内侧壁上,以使得两者的焊接面积更大,连接更为稳固。In one embodiment, as shown in FIG. 1 and FIG. 2 , the front end of the left lower swing
在一实施例中,如图1和图2所示,所述前横梁1、所述左纵梁3和所述右纵梁4均为管梁结构,所述后横梁2为冲压成型件。也即,前横梁1、左纵梁3和右纵梁4为钢管折弯成型的管梁结构,如此,三者的工艺成型简单,加工方便。所述后副车架通过前横梁1、所述左纵梁3和所述右纵梁4连接汽车车身。因此,在后副车架的设计初期,即可规划好前横梁1、左纵梁3和右纵梁4的管径大小,使得规划之后的管径符合设计需求即可。比如,设计的后副车架的前横梁1、左纵梁3和右纵梁4的管梁的管径大小符合以下设计需求:设计后的后副车架必须同时满足与汽车车身通过安装套管11刚性连接和通过衬套软连接的安装需求;使得后副车架应用在侧重不同性能车型中时,仅需通切换后副车架与汽车车身之间的连接方式(通过安装套管11或衬套连接),而不需要重新开发后副车架,进而使得后副车架的平台化衍生较容易,通用化率较高。同时,左下摆臂支架7和右下摆臂支架8均安装在后横梁2上,后横梁2上需要承受的支撑力更大,因此,所述后横梁2设计为冲压成型件,可以在提供足够的支撑作用的同时,还同时满足轻量化要求(相比管梁结构,其可以在具有相同承载能力的情况下,重量更轻)。In one embodiment, as shown in FIGS. 1 and 2 , the front cross member 1 , the left side member 3 and the
在一实施例中,如图1和图2所示,所述前横梁1、所述左纵梁3和所述右纵梁4的中部截面为圆形;所述左纵梁3的后端、所述右纵梁4的后端以及所述前横梁1的左端和右端的截面呈扁平状。也即,在本实施例中,构成前横梁1、左纵梁3和右纵梁4的管梁结构的中间段为圆管,截面(也即中部截面)为圆形;且在本实施例中,所述后副车架通过左纵梁3的后端、所述右纵梁4的后端以及所述前横梁1的左端和右端安装在汽车车身上,因此,在左纵梁3的后端、所述右纵梁4的后端以及所述前横梁1的左端和右端的截面被设计为扁平状,以满足安装要求。In one embodiment, as shown in FIG. 1 and FIG. 2 , the middle section of the front cross member 1 , the left side member 3 and the
在一实施例中,如图1和图2所示,所述左纵梁3的后端、所述右纵梁4的后端以及所述前横梁1的左端和右端均设有安装孔(图未示);所述左纵梁3的后端、所述右纵梁4的后端以及所述前横梁1的左端和右端均通过穿过所述安装孔的安装套管11或衬套连接车身。In one embodiment, as shown in FIGS. 1 and 2 , the rear end of the left longitudinal beam 3, the rear end of the right
也即,在本实施例中,通过左纵梁3的后端、所述右纵梁4的后端以及所述前横梁1的左端和右端设计的安装孔,将所述后副车架用安装套管11(安装套管11为中空型圆柱结构,安装套管11焊接在安装孔的顶部或内壁上,且螺栓穿过安装套管11的内部与汽车车身连接)或衬套(衬套的外圈焊接在安装孔的顶部或内壁上)安装在汽车车身上。That is, in this embodiment, the rear subframe is used for the rear subframe through the mounting holes designed at the rear end of the left side member 3, the rear end of the
可理解地,在本发明中,在后副车架的设计初期,可以规划前横梁1、左纵梁3和右纵梁4的管径大小符合设计需求:设计后的后副车架必须同时满足与汽车车身通过安装套管11刚性连接和通过衬套软连接;此时,若需要使得具有该后副车架的汽车车型满足舒适性需求,后副车架通过衬套安装(软连接)在汽车车身上,以提高舒适性;若需要使得具有该后副车架的汽车车型满足操控稳定性需求,后副车架通过安装套管11(即刚性连接、硬连接)安装在汽车车身。如此,在对应两种不同性能(舒适性或操控稳定性)的汽车车型中切换时,仅需切换车身安装点处(也即本发明中左纵梁3的后端、所述右纵梁4的后端以及所述前横梁1的左端和右端的具有安装孔的点)的安装套管11和衬套即可(此时其他零部件无需更换),而不需重新开发不同的后副车架模具,使得平台化产品衍生容易,且后副车架的零部件通用化率较高,如此,缩短了开发周期,减少模具投入并节约了成本。同时,在可以满足与汽车车身通过安装套管11刚性连接和通过衬套软连接两种连接方式之后,后副车架与车身安装点之间的横向跨距可以设计为定值,使后副车架与汽车车身的接口平台化,有利于汽车车身、后副车架的平台化衍生,为新产品的开发提供便利,进一步提高了产品开发效率,缩短了开发周期,减少了产品开发投入。Understandably, in the present invention, in the early stage of the design of the rear subframe, the pipe diameters of the front cross member 1, the left longitudinal beam 3 and the right
具体地,为使得兼顾安装套管11与衬套的对应的适应不同车型的应用切换,可以首先设定前横梁1、所述左纵梁3和所述右纵梁4对应的管梁直径,此时,左纵梁3的后端、所述右纵梁4的后端以及所述前横梁1的左端和右端的管梁被拍扁之后的扁平状的截面周长,与所述前横梁1、所述左纵梁3和所述右纵梁4的中部截面周长相等且均可以根据上述管梁直径计算得出。此外,左纵梁3的后端、所述右纵梁4的后端以及所述前横梁1的左端和右端的管梁截面高度在必须满足安装套管11和衬套的安装高度要求外,还应达到安装套管11两端与管梁上下面间距大于或等于5mm的要求,以满足焊缝高度要求。且左纵梁3的后端、所述右纵梁4的后端以及所述前横梁1的左端和右端的管梁宽度,还需同时满足衬套的布置要求,使衬套与在与左纵梁3的后端、所述右纵梁4的后端以及所述前横梁1的左端和右端的焊接位置至少具有1/2周长的焊接长度,以使得焊接牢固。Specifically, in order to take into account the corresponding application switching of the
另一方面,本发明实施例还提供一种汽车,其包括上述的后副车架。On the other hand, an embodiment of the present invention also provides an automobile, which includes the above-mentioned rear subframe.
以上所述仅为本发明的较佳实施例而已,并不用以限制本发明,凡在本发明的精神和原则之内所作的任何修改、等同替换和改进等,均应包含在本发明的保护范围之内。The above descriptions are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention shall be included in the protection of the present invention. within the range.
Claims (10)
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