Auxiliary frame of electric automobile

Abstract

The invention discloses an electric automobile auxiliary frame which comprises an auxiliary frame framework, a swing arm connecting frame used for being connected with a lower swing arm mechanism is arranged on the auxiliary frame framework, and the swing arm connecting frame comprises a clamping support connecting part located on the lower portion, a turnover connecting part located on the upper portion and an arc-shaped part located in the middle. The swing arm connecting frame is welded and fixedly connected with the side portion of the auxiliary frame through the clamping support connecting portion, the turnover connecting portion and the arc-shaped portion. The electric automobile auxiliary frame is reasonable in structural design, the swing arm connecting frame and the frame beam of the auxiliary frame are connected in a welded mode through a set of associated connecting structures, the lower clamping support connecting part, the upper turnover connecting part and the middle arc-shaped part are jointly connected in a welded mode, the influence of size errors is small, and welding connection is reliable.

Description

Technical Field

[0001] This invention relates to the field of electric vehicle technology, and in particular to an electric vehicle subframe. Background Technology

[0002] The front subframe of an electric vehicle is mounted at the front of the car and forms the framework of the front axle, on which various control arms and other structures are installed. During vehicle operation, the front subframe bears various forces and torques, playing a vital role in protection and cushioning.

[0003] The front subframe of electric vehicles is mostly a frame structure, which is formed by welding cylindrical beams. The connecting brackets for the swing arm assembly are welded to the cylindrical beams. The existing connection method often involves forming an arc-shaped groove on the connecting bracket, and welding the arc-shaped groove to the outer edge of the cylindrical beam. This method has processing errors, and the structural form affects the welding connection quality. For example, patent CN109159819A discloses a lightweight front subframe for new energy vehicles, which includes a crossbeam and spatially curved longitudinal tube beams symmetrically fixed at both ends of the crossbeam. The two longitudinal tube beams and the crossbeam form an H-shaped structure. Symmetrically arranged body connecting vertical tube beams, front swing arm supports, rear swing arm supports, rear body connecting frames, and lateral stabilizer bar supports are fixed on the two longitudinal tube beams. The swing arm supports are welded to the longitudinal tube beams, which is prone to dimensional errors that affect the welding quality. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides an electric vehicle subframe that is less affected by dimensional errors and has reliable welding connections.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: The electric vehicle subframe includes a subframe frame, on which a swing arm connecting frame is provided for connection with a lower swing arm mechanism. The swing arm connecting frame includes a lower clip connecting part, an upper folding connecting part, and a middle arc-shaped part. The swing arm connecting frame is welded and fixedly connected to the side of the subframe frame through the clip connecting part, the folding connecting part, and the arc-shaped part.

[0006] Further or preferred: The subframe is a square frame structure formed by welding frame beams, and two swing arm connecting frames are arranged side by side for each lower swing arm mechanism.

[0007] The card holder connector, the folding connector, and the arc-shaped part are an integral structure.

[0008] The square frame structure includes a front beam, a rear beam, and a pair of connecting beams. The front beam and the rear beam are welded together by the pair of connecting beams to form a square structure. The ends of the front beam and the rear beam are both bent structures, forming vertical sections. The top of the vertical sections is welded with a vehicle body connecting structure.

[0009] Steering brackets for steering gear installation are welded at the inner corners of the square frame structure.

[0010] The steering gear bracket includes a stamped lower connecting part and an upper step. One end of the lower connecting part is welded to the rear beam, and the other end of the lower connecting part is welded to the connecting beam. The connection point with the connecting beam is located between the two swing arm connecting frames.

[0011] The swing arm connecting frame includes a base plate and a connecting body welded together. The inner side of the connecting body has an arc-shaped part that fits against the outer edge of the connecting beam. The base plate is located below the connecting beam and forms a card-shaped connecting part with the arc-shaped part. The top inner side of the connecting body is provided with a protruding part, which is bent to form a folded connecting part.

[0012] The end of the folded connector is provided with a flange structure.

[0013] The outer edge of the connecting beam is provided with a aligning connecting rib, and the arc-shaped part is provided with a groove that matches the corresponding connecting rib. The aligning connecting rib and the groove are spot welded together.

[0014] Compared with the prior art, the present invention has the following advantages: The electric vehicle subframe structure is reasonably designed. The swing arm connecting frame and the subframe frame beam are welded together by a set of associated connecting structures. The lower card holder connecting part, the upper folding connecting part and the middle arc part are welded together, which is less affected by dimensional errors and the welding connection is reliable. Attached Figure Description

[0015] The following is a brief explanation of the contents of each of the accompanying drawings and the markings in the drawings: Figure 1 This is a schematic diagram of the subframe structure of the present invention. Figure 1 .

[0016] Figure 2 This is a schematic diagram of the subframe structure of the present invention. Figure 2 .

[0017] Figure 3 This is a partially enlarged schematic diagram of the subframe of the present invention.

[0018] In the picture: 1. Subframe frame, 101. Frame beam, 102. Body connection structure, 103. Motor connection structure, 104. Steering gear bracket, 105. Swing arm connecting bracket, 1051. Connecting body, 1052. Card holder connecting part, 1053. Folding connecting part, 1054. Alignment connecting rib, 2. Lower swing arm mechanism, 3. Steering knuckle mechanism, 4. Sliding column assembly. Detailed Implementation

[0019] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings and through the description of the examples.

[0020] like Figures 1 to 3 As shown, the electric vehicle subframe includes a subframe frame 1, on which a swing arm connecting frame 105 for connecting to the lower swing arm mechanism is provided. The swing arm connecting frame is welded to the side of the subframe frame. The inner end of the lower swing arm mechanism 2 is hinged to the swing arm connecting frame via a pin. The outer end of the lower swing arm mechanism is connected to a steering knuckle mechanism 3, and the steering knuckle mechanism is connected to a sliding column assembly 4.

[0021] The swing arm connecting frame 105 includes a lower tray connecting part 1052, an upper folding connecting part 1053, and a middle arc-shaped part. The swing arm connecting frame is welded and fixedly connected to the side of the frame beam 101 of the subframe frame through the tray connecting part, the folding connecting part, and the arc-shaped part. The tray connecting part, the folding connecting part, and the arc-shaped part are an integral structure; they are welded together by the lower tray connecting part, the upper folding connecting part, and the middle arc-shaped part, which is less affected by dimensional errors and the welding connection is reliable.

[0022] The subframe is a square frame structure formed by welding frame beams. Two swing arm connecting frames are set side by side for each lower swing arm mechanism, making the structure stable and reliable.

[0023] like Figure 1 and Figure 2 As shown, the square frame structure includes a front beam, a rear beam, and a pair of connecting beams. The front beam, the rear beam, and the pair of connecting beams are all hollow tubular beams. The front beam and the rear beam are welded together by the pair of connecting beams to form a square structure. Furthermore, the ends of both the front and rear beams are bent structures, forming vertical sections. The top of the vertical sections is welded with a body connection structure 102. The body connection structure is an end flange, which forms a docking connection structure with the body through the bending of the front and rear beams. The structure is stable and reliable.

[0024] A steering gear bracket 104 for steering gear installation is welded at the inner corner of the square frame structure, and a set of motor connection structure 103 is provided on the rear beam. The integrated setup results in a compact structure.

[0025] Furthermore, the steering gear bracket includes a stamped lower connecting part and an upper step. One end of the lower connecting part is welded to the rear beam, and the other end of the lower connecting part is welded to the connecting beam. The connection point with the connecting beam is located between the two swing arm connecting frames, which improves the structural strength by utilizing its own structure.

[0026] The steering bracket 104 is inclinedly set at the corner inside the subframe frame. It is not welded to the corner, that is, there is a gap between it and the corner. By welding the two ends to the rear beam and the side connecting beam respectively, the structural strength of the welded joint of the subframe frame and the swing arm connecting bracket can be improved at the same time.

[0027] The swing arm connecting frame includes a base plate welded together with a connecting body 1051. The inner side of the connecting body has an arc-shaped part that fits against the outer edge of the connecting beam. The base plate is located below the connecting beam and forms a card-shaped connecting part with the arc-shaped part. The top inner side of the connecting body is provided with a protruding part, which is bent to form a folded connecting part.

[0028] The end of the folded connection has a flange structure, which has a large contact area with the connecting beam; the folded connection has an arc-shaped bending structure, which is easy to form, and the swing arm connecting frame itself has a stable and reliable structure. The outer edge of the connecting beam is provided with a aligning connecting rib 1054, and the arc-shaped part is provided with a groove that matches the corresponding connecting rib. The aligning connecting rib and the groove are spot welded together; this eliminates the need for traditional positioning fixtures and improves connection reliability.

[0029] The electric vehicle subframe structure of this invention is reasonably designed. The swing arm connecting frame and the frame beam of the subframe are welded together by a set of associated connecting structures. The lower card holder connecting part, the upper folding connecting part and the middle arc part are welded together, which is less affected by dimensional errors and the welding connection is reliable.

[0030] The above description is merely an illustration of preferred embodiments of the present invention, and the above technical features can be arbitrarily combined to form multiple embodiments of the present invention.

[0031] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the concept and technical solution of the present invention, or the direct application of the concept and technical solution of the present invention to other occasions without modification, are all within the protection scope of the present invention.

Claims

1. An electric vehicle subframe, comprising a subframe frame, wherein a swing arm connecting bracket for connecting to a lower swing arm mechanism is provided on the subframe frame, characterized in that: The swing arm connecting frame includes a lower card holder connecting part, an upper folding connecting part, and a middle arc-shaped part. The swing arm connecting frame is welded and fixedly connected to the side of the subframe frame through the card holder connecting part, the folding connecting part, and the arc-shaped part.

2. The electric vehicle subframe as described in claim 1, characterized in that: The subframe is a square frame structure formed by welding frame beams, and two swing arm connecting frames are arranged side by side for each lower swing arm mechanism.

3. The electric vehicle subframe as described in claim 2, characterized in that: The card holder connector, the folding connector, and the arc-shaped part are an integral structure.

4. The electric vehicle subframe as described in claim 2, characterized in that: The square frame structure includes a front beam, a rear beam, and a pair of connecting beams. The front beam and the rear beam are welded together by the pair of connecting beams to form a square structure. The ends of the front beam and the rear beam are both bent structures, forming vertical sections. The top of the vertical sections is welded with a vehicle body connecting structure.

5. The electric vehicle subframe as described in claim 4, characterized in that: Steering brackets for steering gear installation are welded at the inner corners of the square frame structure.

6. The electric vehicle subframe as described in claim 5, characterized in that: The steering gear bracket includes a stamped lower connecting part and an upper step. One end of the lower connecting part is welded to the rear beam, and the other end of the lower connecting part is welded to the connecting beam. The connection point with the connecting beam is located between the two swing arm connecting frames.

7. The electric vehicle subframe as described in claim 4, characterized in that: The swing arm connecting frame includes a base plate and a connecting body welded together. The inner side of the connecting body has an arc-shaped part that fits against the outer edge of the connecting beam. The base plate is located below the connecting beam and forms a card-shaped connecting part with the arc-shaped part. The top inner side of the connecting body is provided with a protruding part, which is bent to form a folded connecting part.

8. The electric vehicle subframe as described in claim 7, characterized in that: The end of the folded connector is provided with a flange structure.

9. The electric vehicle subframe as described in claim 7, characterized in that: The outer edge of the connecting beam is provided with a aligning connecting rib, and the arc-shaped part is provided with a groove that matches the corresponding connecting rib. The aligning connecting rib and the groove are spot welded together.

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