A subframe structure adaptable to multiple motors

Abstract

This invention relates to the field of automotive subframe technology and discloses a subframe structure adaptable to multiple motors. The subframe includes a subframe body and supporting crossbeams. The subframe body is a frame structure composed of two sets of longitudinal beams and fixedly mounted front and rear crossbeams. Supporting crossbeam fixing points are provided at the front ends of the two sets of longitudinal beams for mounting the supporting crossbeams to fix the motors. The supporting crossbeams are U-shaped. Multiple rear motor mounting brackets are provided on the top of the rear crossbeam, and the mounting positions of these brackets on the rear crossbeam are adjustable to accommodate different motor mounting points. Through a platform-based design approach for the subframe, different motors can be matched, significantly reducing development costs and enhancing the product's market competitiveness.

Description

Technical Field

[0001] This invention relates to the field of automotive subframe technology, and in particular to a subframe structure that can be adapted to multiple motors. Background Technology

[0002] The subframe plays a crucial role in the automotive chassis, influencing vehicle performance. With the increasing prevalence of electric vehicles, the varying sizes and locations of motors necessitate more flexible subframe designs. Traditional subframe structures are designed for single motors; for different types of motors, the main subframe structure must be modified to accommodate them, increasing development costs and timelines. Therefore, current subframe structures cannot accommodate the installation requirements of multiple motor types and cannot achieve platform-based design. Summary of the Invention

[0003] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a subframe structure that can be adapted to multiple motors. By adopting a platform-based design approach for the subframe, it can meet the matching requirements of different motors, significantly reduce development costs, and enhance the market competitiveness of the product.

[0004] To achieve the above objectives, the present invention is implemented through the following technical solution:

[0005] A subframe structure adaptable to multiple motors includes a subframe body and a supporting crossbeam. The subframe body consists of a frame structure composed of two sets of longitudinal beams and fixedly suspended front and rear crossbeams. The front ends of the two sets of longitudinal beams are provided with supporting crossbeam fixing points for mounting the supporting crossbeams to fix the motors. The supporting crossbeams are configured with a U-shaped structure. Multiple rear motor mounting brackets are provided on the top of the rear crossbeam. The mounting positions of the rear motor mounting brackets on the rear crossbeam are adjustable to adapt to different motor mounting points.

[0006] As a further implementation, the rear crossbeam is provided with positioning holes for connection with the rear suspension bracket of the motor. Multiple fixing holes can be arranged along the length direction at the bottom of the rear suspension bracket of the motor. By fixing the rear crossbeam with different fixing holes, the position of the rear suspension bracket of the motor on the rear crossbeam can be adjusted.

[0007] As a further implementation, the supporting beam includes a lower beam and connecting beams at both ends of the lower beam.

[0008] As a further implementation, the connecting beam extends upward at an angle and forms an integral structure with the lower crossbeam, creating a U-shaped crossbeam.

[0009] As a further implementation, two support beam fixing points of different heights are respectively set on the inner side of the front end of the two sets of longitudinal beams, and mounting holes are correspondingly provided on the connecting beams at both ends of the lower beam. The mounting holes cooperate with the support beam fixing points and are connected by fasteners.

[0010] As a further implementation, the height of the two mounting holes on the connecting beam is adapted to the height of the corresponding support beam fixing point, and the mounting hole located at the lower part of the connecting beam is in the same plane as the lower beam to improve the support performance of the support beam.

[0011] As a further implementation, the upper part of the crossbeam at the connecting beams at both ends of the lower crossbeam is set to a downward arc transition in order to avoid the movement space of the large motor.

[0012] As a further implementation, a middle crossbeam is connected between the lower surfaces of the two sets of longitudinal beams at the middle position, and the bottom of the motor is supported by the middle crossbeam.

[0013] As a further implementation, the upper surfaces of the two sets of longitudinal beams are respectively provided with upper rod system fixing brackets.

[0014] As a further implementation, a trailing arm bracket is provided at the joint between the front crossbeam and the longitudinal beam.

[0015] The beneficial effects of the present invention are as follows:

[0016] 1. The motor rear suspension mounting bracket of the present invention has an adjustable mounting position on the rear crossbeam to accommodate different motor mounting points. It also features a support crossbeam, and the upper part of the crossbeam at the connecting beams at both ends of the lower crossbeam is designed with a downward arc transition to avoid the movement space of the large motor. The support crossbeam and the subframe body are mounted at four points, and the lower fixing point of the support crossbeam is in the same plane as the lower crossbeam. This design not only improves the support performance of the support crossbeam, but also improves the dynamic stiffness of the upper fixing point of the subframe, thus meeting the NVH requirements of the whole vehicle.

[0017] 2. The supporting crossbeam and subframe body of this invention adopt a detachable assembly method. For vehicles within the developed platform with low NVH performance requirements, the crossbeam can be eliminated to achieve weight and cost reduction. The supporting crossbeam adopts an upper and lower interlocking design, with the upper and lower crossbeams joined and welded to form a closed cross section, providing good support and bending resistance. Attached Figure Description

[0018] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0019] Figure 1This is a schematic diagram of the subframe body in an embodiment of the present invention;

[0020] Figure 2 This is a schematic diagram of the supporting beam structure in an embodiment of the present invention;

[0021] Figure 3 This is a schematic cross-sectional view of the supporting beam in an embodiment of the present invention;

[0022] Figure 4 This is a schematic diagram of the subframe assembly in an embodiment of the present invention;

[0023] Figure 5 This is a schematic diagram of the subframe assembly assembling the motor in an embodiment of the present invention.

[0024] The diagram exaggerates the spacing or dimensions between parts to show their positions; the diagram is for illustrative purposes only.

[0025] The components include: 1. Subframe body; 2. Support crossbeam; 11. Longitudinal beam; 12. Front crossbeam; 13. Rear crossbeam; 101. Support crossbeam fixing point; 102. Support crossbeam fixing point; 103. Support crossbeam fixing point; 104. Support crossbeam fixing point; 105. Rear motor mounting bracket; 106. Rear motor mounting bracket; 107. Rear motor mounting bracket; 108. Rear motor mounting bracket; 109. Front motor mounting point; 1011. First trailing arm bracket; 1012. Second trailing arm bracket. 1013. Upper pole system fixing bracket; 1014. Upper pole system fixing bracket; 1015. Upper pole system fixing bracket; 1016. Upper pole system fixing bracket; 1017. Upper pole system fixing bracket; 1018. Upper pole system fixing bracket; 1019. Lower control arm bracket; 1020. Lower control arm bracket; 1010. Intermediate crossbeam; 201. Upper crossbeam body; 202. Lower crossbeam body; 203. Mounting hole; 204. Mounting hole; 205. Mounting hole; 206. Mounting hole; 207. Upper part of crossbeam; 208. Upper part of crossbeam. Detailed Implementation

[0026] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the invention. Unless otherwise specified, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0027] Example 1

[0028] In a typical embodiment of the present invention, reference is made to Figure 1 As shown, a subframe structure adaptable to multiple motors includes a subframe body 1 and a supporting crossbeam 2. The subframe body 1 consists of two sets of longitudinal beams 11 with circular drive holes and fixedly suspended front and rear crossbeams, as shown. Figure 4As shown, the front ends of the two sets of longitudinal beams 11 are connected to the front crossbeam 12 near the end position, and the rear ends are connected to the rear crossbeam 13 near the end position.

[0029] like Figure 1 As shown, a trailing arm bracket 1011 and a trailing arm bracket 1012 are respectively provided at the joint between the front crossbeam 12 and the longitudinal beam 11 of the subframe, so as to... Figure 1 Taking a perspective example, the trailing arm bracket 1011 is located on the left longitudinal beam 11, and the trailing arm bracket 1012 is located on the right longitudinal beam 11. The trailing arm is installed through the trailing arm bracket.

[0030] like Figure 1 As shown, three sets of upper rod system fixing brackets are welded to the upper surface of the left longitudinal beam 11. Specifically, upper rod system fixing brackets 1013, 1015, and 1017 are sequentially located near the front, middle, and rear ends of the upper surface of the left longitudinal beam 11. Correspondingly, upper rod system fixing brackets 1014, 1016, and 1018 are sequentially located near the front, middle, and rear ends of the upper surface of the right longitudinal beam 11. The bottom end of each upper rod system fixing bracket is fixedly connected to the longitudinal beam, and the top surface is designed with a groove structure. During the installation of the upper rod system, the rods can mate with the grooves, facilitating the fixing and assembly of the rods.

[0031] The lower control arm bracket 1019 is welded to the lower surface of the middle position of the left longitudinal beam 11, and the lower control arm bracket 1020 is welded to the lower surface of the middle position of the right longitudinal beam 11. The lower control arm bracket 1019 and the lower control arm bracket 1020 are connected by the middle crossbeam 1010, which supports the bottom of the motor.

[0032] This design significantly improves the rigidity of the bracket mounting points, effectively enhancing the overall vehicle handling performance.

[0033] like Figure 1 As shown, four rear motor mounting brackets, 105, 106, 107, and 108, are welded onto the rear crossbeam 13 of the subframe. These four rear motor mounting brackets are arranged sequentially from left to right on the upper surface of the rear crossbeam 13. The welding position of the rear motor mounting brackets can be adjusted appropriately on the rear crossbeam.

[0034] Of course, the rear motor mounting bracket and the rear crossbeam 13 can also be fixedly connected using fasteners. The rear crossbeam has positioning holes for connecting to the rear motor mounting bracket. Specifically, the rear motor mounting bracket is a stamped structural component, and multiple fixing holes can be arranged along its length at its bottom end. The rear motor mounting bracket is fixed to the rear crossbeam 13 by the cooperation of the fixing holes and positioning holes. When different models of motors need to be installed, the relative position of the rear motor mounting bracket and the rear crossbeam 13 can be adjusted by using different fixing holes to fix it to the rear crossbeam, thereby adjusting the position of the rear motor mounting bracket on the rear crossbeam 13 to accommodate different motor mounting points. The front crossbeam 12 has a front motor mounting point 109 in the middle position to fix the motor.

[0035] like Figure 1 As shown, support beam fixing points are provided on the longitudinal beams of the subframe body 1. Support beam fixing points 101 and 103 are located on the inner front end of the left longitudinal beam 11, while support beam fixing points 102 and 104 are located on the inner front end of the right longitudinal beam 11. Support beam fixing point 101 is higher than support beam fixing point 103, and support beam fixing point 102 is higher than support beam fixing point 104. Support beam fixing points 103 and 104 are the main fixing points for the support beams, while support beam fixing points 101 and 102 are auxiliary fixing points. The four support beam fixing points are formed by welding ear plates onto the longitudinal beams, with openings on the ear plates serving as fixing holes.

[0036] like Figure 2 As shown, the supporting beam 2 includes a lower beam and connecting beams at both ends of the lower beam. The connecting beams extend upwards at an incline and are an integral structure with the lower beam, forming a U-shaped beam.

[0037] Mounting holes 203 and 205 are provided on the connecting beam at the left end of the lower crossbeam, and mounting holes 204 and 206 are provided on the connecting beam at the right end of the lower crossbeam. The positions of the four mounting holes correspond to the positions of the four supporting crossbeam fixing points, and their heights are adapted. They are assembled using four M10 bolts. In this embodiment, supporting crossbeam fixing points 103 and 104 serve as the main supporting fixing points on the subframe, fixing the supporting crossbeam 2 and transmitting force. Adding two auxiliary fixing points, supporting crossbeam fixing points 101 and 102, can effectively improve the dynamic stiffness and modal characteristics of the motor front suspension mounting point. Mounting holes 205 and 206 are both located at the bottom end of the connecting beam and are on the same plane as the lower crossbeam.

[0038] The support beam 2 and the subframe body 1 are installed at four points, and the lower fixing points of the support beam (mounting holes 205 and 206) are in the same plane as the lower beam. This design not only improves the support performance of the support beam, but also increases the dynamic stiffness of the upper fixing points of the subframe, thus meeting the NVH requirements of the whole vehicle.

[0039] In this embodiment, the supporting crossbeam is made of high-strength steel. The lower crossbeam at the bottom is the main supporting and fixing beam. The upper part 207 and the upper part 208 of the crossbeam at the upper part of the connecting beam at both ends are designed to transition downward in an arc shape, so that the supporting crossbeam 2 is U-shaped. The crossbeam that plays a supporting role is located at the bottom, which helps to avoid the movement space of the large motor and meet the fixing of the large motor.

[0040] Understandably, the lower crossbeam has several mounting holes for fixing the high and low voltage wiring harnesses of the motor. The support crossbeam and the subframe body are assembled in a detachable manner. For vehicles within the developed platform that do not have high NVH performance requirements, the crossbeam can be eliminated to achieve weight reduction and cost reduction.

[0041] like Figure 3 As shown, the supporting crossbeam adopts an upper and lower interlocking design, with the upper and lower pieces respectively made of high-strength plates through stamping and forming processes. The upper crossbeam 201 and the lower crossbeam 202 are butt-jointed and welded to form a closed cross section, providing good support and bending resistance. When the high-performance version of the subframe is not adopted, the crossbeam can be omitted to reduce the overall vehicle weight and cost.

[0042] The subframe in this embodiment is based on a platform-based design concept, which can meet the matching of different motors, significantly reduce development costs, enhance the market competitiveness of the product, and has good versatility and flexibility, which can adapt to the needs of different vehicle models and motor configurations.

[0043] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A subframe structure adaptable to multiple motors, characterized in that, The system includes a subframe body and supporting crossbeams. The subframe body consists of a frame structure composed of two sets of longitudinal beams and fixed-mount front and rear crossbeams. Supporting crossbeam fixing points are located at the front ends of the two sets of longitudinal beams for mounting the supporting crossbeams to secure the motor. The supporting crossbeams are U-shaped. Multiple rear motor mounting brackets are located on the top of the rear crossbeam, and their installation positions on the rear crossbeam are adjustable to accommodate different motor mounting points. The supporting crossbeams include a lower crossbeam and connecting beams at both ends of the lower crossbeam. The connecting beams extend upwards at an angle, forming a U-shaped crossbeam integrated with the lower crossbeam. Two supporting crossbeam fixing points of different heights are respectively located on the inner sides of the front ends of the two sets of longitudinal beams. Corresponding mounting holes are provided on the connecting beams at both ends of the lower crossbeam. These mounting holes mate with the supporting crossbeam fixing points and are connected via fasteners. The heights of the two mounting holes on the connecting beams are adapted to the heights of the corresponding supporting crossbeam fixing points. The mounting holes at the lower part of the connecting beam are in the same plane as the lower crossbeam to improve the supporting performance of the supporting crossbeams.

2. The subframe structure adaptable to multiple motors according to claim 1, characterized in that, The rear crossbeam is provided with positioning holes for connection with the rear suspension bracket of the motor. Multiple fixing holes can be arranged along the length direction at the bottom of the rear suspension bracket of the motor. By fixing the rear crossbeam with different fixing holes, the position of the rear suspension bracket of the motor on the rear crossbeam can be adjusted.

3. The subframe structure adaptable to multiple motors according to claim 1, characterized in that, The upper part of the crossbeam at the connecting beams at both ends of the lower crossbeam is designed with a downward arc transition to avoid the movement space of the large motor.

4. The subframe structure adaptable to multiple motors according to claim 1, characterized in that, A middle crossbeam is connected between the lower surfaces of the two sets of longitudinal beams at the middle position, and the bottom of the motor is supported by the middle crossbeam.

5. A subframe structure adaptable to multiple motors according to claim 1, characterized in that, The upper surfaces of the two sets of longitudinal beams are respectively provided with upper rod system fixing brackets.

6. A subframe structure adaptable to multiple motors according to claim 1, characterized in that, A trailing arm bracket is provided at the joint between the front crossbeam and the longitudinal beam.

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