Rear frame structure of electric vehicle

Abstract

The utility model relates to the technical field of electric vehicle frames, and discloses a rear frame structure of an electric vehicle, which comprises a rear connecting frame, connecting lugs A are welded on two opposite sides of the rear connecting frame, an annular groove is arranged at the rear end of the inner side of the rear connecting frame, a connecting ring is sleeved outside the annular groove, and a leaning bent plate is welded on the outer side of the connecting ring. A supporting plate is fixed to the bottom side of the rear end of the rear connecting frame. Through the cooperation of the U-shaped hinge frame and the multiple supporting stop blocks, the supporting angle of the leaning bent plate can be conveniently adjusted front and back, the leaning bent plate can be matched with the back positions of people with different body types on the electric vehicle, the leaning fitting degree and comfort are improved, and through the cooperation of the tensioning spring, the leaning angle of the leaning bent plate can be adjusted. The leaning bent plate is arranged on the connecting ring, so that the leaning bent plate is prevented from rotating in the leaning process, the supporting stability is further improved, meanwhile, the detachability of the leaning bent plate is achieved through the opening in the connecting ring, and therefore the damaged leaning bent plate can be rapidly replaced.

Description

Technical Field

[0001] This utility model relates to the field of electric vehicle frame technology, and in particular to a rear frame structure for an electric vehicle. Background Technology

[0002] The rear frame structure of an electric vehicle is an important component of the vehicle. Its design and function directly affect the vehicle's performance, stability, and load-bearing capacity. It is the main support structure for the rear wheels, battery, seats, and passenger weight, ensuring the vehicle remains stable while driving.

[0003] Chinese Patent Publication No. CN214216003U discloses a rear frame structure for an electric vehicle, including a connecting frame, a backrest bracket, and an arc-shaped support frame. Both ends of the connecting frame are provided with protrusions, and the protrusions are provided with through holes in the middle. The connecting frame includes a front part. This electric vehicle rear frame structure effectively prevents rear passengers from falling off, solving the problems of uncomfortable backrests and preventing rear passengers from falling off.

[0004] The aforementioned existing technical solutions have the following shortcomings: In this rear frame structure, the backrest bracket is mainly fixed to the connecting frame by bolts and through holes, so that the support angle of the support plate cannot be changed. However, due to the different body shapes of the people in the rear seat, it is not easy to ensure that the support plate with the fixed angle fits tightly with the back of the people, thus affecting the support effect. Therefore, there is room for improvement. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art, which makes it difficult to adjust the support angle and meet the requirements of different people's backs. This utility model proposes a rear frame structure for electric vehicles.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: a rear frame structure for an electric vehicle, comprising: a rear connecting frame, with connecting lugs A welded on both opposite sides of the rear connecting frame; an annular groove opened at the rear end of the inner side of the rear connecting frame; a connecting ring sleeved on the outside of the annular groove; a backing curved plate welded on the outside of the connecting ring; a support plate fixed to the bottom side of the rear end of the rear connecting frame; multiple support blocks welded at equal intervals at the top of the support plate; the multiple support blocks being arranged in a linear array on the support plate; a U-shaped hinge welded on the side of the backing curved plate close to the support plate; the bottom end of the U-shaped hinge abutting against the inner side of the support blocks; two symmetrically distributed tension springs connected between the backing curved plate and the support plate; the tension springs being located on both sides of the U-shaped hinge; a connecting lug B fixed to the front end of the support plate; and assembly holes opened on both the connecting lugs A and B.

[0007] Preferably, the cross-section of the curved plate is wavy, and longitudinal through holes are provided on the curved plate.

[0008] Preferably, the connecting ring has an opening, and the connecting ring is engaged with the annular groove through the opening, with the curved plate located on the opposite side of the opening on the connecting ring.

[0009] Preferably, the cross-section of the support block is a right triangle, and the inclined surface of the support block faces away from the side that rests against the curved plate.

[0010] Preferably, a horizontal tie rod is fixed to the inner side of the U-shaped hinge, and the included angle formed by the U-shaped hinge and the support plate is an acute angle.

[0011] Preferably, two parallel welding plates are fixed on the side of the support plate near the connecting lug B, and the support plate is welded to the rear connecting frame through the welding plates.

[0012] Preferably, the width of the assembly hole is matched with the diameter of the bolt, and the length of the assembly hole is greater than the diameter of the bolt.

[0013] Compared with the prior art, the beneficial effects of this utility model include:

[0014] The U-shaped hinge and multiple support blocks allow for front and rear adjustment of the support angle of the backrest plate, enabling it to adapt to the back positions of riders of different body types on the electric vehicle, improving the fit and comfort. The tension spring prevents the backrest plate from rotating during leaning, further enhancing support stability. The opening on the connecting ring allows for the removability of the backrest plate, facilitating quick replacement of damaged plates. The assembly holes allow for fine adjustments to the assembly position of the entire rear frame on the electric vehicle to accommodate different models. Attached Figure Description

[0015] The disclosure of this utility model is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. In the drawings, the same reference numerals are used to refer to the same parts. Wherein:

[0016] Figure 1 The schematic diagram shows a three-dimensional structural schematic diagram according to one embodiment of the present invention;

[0017] Figure 2 The schematic diagram shows a three-dimensional structural diagram of a U-shaped hinge according to one embodiment of the present invention;

[0018] Figure 3 The schematic diagram shows a three-dimensional structural diagram of a curved plate according to one embodiment of the present invention;

[0019] Figure 4 The diagram schematically shows a three-dimensional structural diagram of the distribution of support blocks according to one embodiment of the present invention.

[0020] The following are the labels in the diagram: 1. Rear connecting frame; 2. Connecting lug A; 3. Annular groove; 4. Connecting ring; 5. Reinforcing curved plate; 6. Support plate; 7. Connecting lug B; 8. U-shaped hinge; 9. Support block; 10. Tension spring; 11. Horizontal tie rod; 12. Welding plate; 13. Assembly hole. Detailed Implementation

[0021] It is readily understood that, based on the technical solution of this utility model, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of this utility model. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative descriptions of the technical solution of this utility model and should not be considered as the entirety of this utility model or as limitations or restrictions on the technical solution of this utility model.

[0022] To address the shortcomings of existing technologies, such as difficulty in adjusting the support angle and in achieving a good fit for different individuals' backs, the following solution is disclosed, as follows: Figures 1-4 As shown:

[0023] A rear frame structure for an electric vehicle includes: a rear connecting frame 1, with connecting lugs A2 welded to both opposite sides of the rear connecting frame 1; an annular groove 3 formed at the rear end of the inner side of the rear connecting frame 1; a connecting ring 4 sleeved on the outside of the annular groove 3; a retaining curved plate 5 welded to the outside of the connecting ring 4; a support plate 6 fixed to the bottom side of the rear end of the rear connecting frame 1; multiple support blocks 9 welded at equal intervals to the top of the support plate 6, the multiple support blocks 9 being arranged in a linear array on the support plate 6; a U-shaped hinge 8 welded to the side of the retaining curved plate 5 near the support plate 6, the bottom end of the U-shaped hinge 8 abutting against the inner side of the support blocks 9; two symmetrically distributed tension springs 10 connected between the retaining curved plate 5 and the support plate 6, the tension springs 10 being located on both sides of the U-shaped hinge 8; and a connecting lug B7 fixed to the front end of the support plate 6. Assembly holes 13 are provided on both lug A2 and lug B7; the cross section of the curved plate 5 is wavy, and a longitudinal through hole is provided on the curved plate 5; the connecting ring 4 is provided with an opening, and the connecting ring 4 is engaged with the annular groove 3 through the opening, and the curved plate 5 is located on the opposite side of the opening on the connecting ring 4; the cross section of the support block 9 is a right triangle, and the inclined surface of the support block 9 faces away from the curved plate 5; a horizontal tie rod 11 is fixed on the inner side of the U-shaped hinge 8, and the included angle formed by the U-shaped hinge 8 and the support plate 6 is an acute angle; two parallel welding plates 12 are fixed on the side of the support plate 6 near the connecting lug B7, and the support plate 6 is welded to the rear connecting frame 1 through the welding plates 12; the width of the assembly hole 13 is adapted to the diameter of the bolt, and the length of the assembly hole 13 is greater than the diameter of the bolt.

[0024] In this embodiment, by inserting bolts into the assembly holes 13 on the connecting lug A2 and the support plate 6, the rear connecting frame 1 is assembled onto the vehicle body according to the installation point of the electric vehicle. The curved backing plate 5 can be directly fitted onto the outside of the annular groove 3 through the opening on the connecting ring 4. The welding plate 12 and the outer side of the rear connecting frame 1 are welded together to fix the support plate 6. The tension spring 10 is assembled and connected to the curved backing plate 5 and the support plate 6 using bolts. By flipping the curved backing plate 5 upwards, the U-shaped hinge 8 is rotated, and the bottom end of the U-shaped hinge 8 abuts against the inner side of the right-angled edge of the support block 9. Using the supporting action of the support block 9, the back of a person on the electric vehicle can lean against the curved backing plate 5. On the inside, by abutting the U-shaped hinge 8 against the support blocks 9 at different positions, the different flip angles of the backrest curved plate 5 can be fixed, so that the inside of the backrest curved plate 5 can fit the back and waist position of people of different body types. When adjusting, simply flip the backrest curved plate 5 slightly forward, then flip the U-shaped hinge 8 outward, and then flip the position of the backrest curved plate 5 back and forth according to the specific adjustment angle. Then flip the U-shaped hinge 8 inward and let the bottom end of the U-shaped hinge 8 slide past the adjacent support block 9. Then, using the tension of the tension spring 10, the U-shaped hinge 8, the support block 9 and the support plate 6 form a support angle to adjust the support angle of the backrest curved plate 5.

[0025] The technical scope of this utility model is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this utility model, and all such modifications and variations should fall within the protection scope of this utility model.

Claims

1. A rear frame structure for an electric vehicle, characterized in that, include: The rear connecting frame (1) has connecting lugs A (2) welded on both opposite sides. An annular groove (3) is provided at the rear end of the inner side of the rear connecting frame (1). A connecting ring (4) is sleeved on the outside of the annular groove (3). A curved plate (5) is welded on the outside of the connecting ring (4). A support plate (6) is fixed on the bottom side of the rear end of the rear connecting frame (1). Multiple support blocks (9) are welded at equal intervals on the top of the support plate (6). The multiple support blocks (9) are arranged in a linear array on the support plate (6). The curved plate (5) is welded with a U-shaped hinge (8) on the side near the support plate (6). The bottom end of the U-shaped hinge (8) abuts against the inner side of the support block (9). Two symmetrically distributed tension springs (10) are connected between the curved plate (5) and the support plate (6). The tension springs (10) are located on both sides of the U-shaped hinge (8). The front end of the support plate (6) is fixed with a connecting lug B (7). Both the connecting lug A (2) and the connecting lug B (7) are provided with assembly holes (13).

2. The rear frame structure of the electric vehicle according to claim 1, characterized in that: The cross section of the curved plate (5) is wavy, and the curved plate (5) is provided with a longitudinal through hole.

3. The rear frame structure of the electric vehicle according to claim 1, characterized in that: The connecting ring (4) has an opening, and the connecting ring (4) is engaged with the annular groove (3) through the opening. The leaning curved plate (5) is located on the opposite side of the opening on the connecting ring (4).

4. The rear frame structure of the electric vehicle according to claim 1, characterized in that: The cross-section of the support block (9) is a right triangle, and the inclined surface of the support block (9) faces away from the side that rests against the curved plate (5).

5. The rear frame structure of the electric vehicle according to claim 1, characterized in that: A horizontal tie rod (11) is fixed to the inner side of the U-shaped hinge (8), and the included angle formed by the U-shaped hinge (8) and the support plate (6) is an acute angle.

6. The rear frame structure of the electric vehicle according to claim 1, characterized in that: The support plate (6) has two parallel welding plates (12) fixed on one side near the connecting lug B (7), and the support plate (6) is welded to the rear connecting frame (1) through the welding plates (12).

7. The rear frame structure of the electric vehicle according to claim 1, characterized in that: The width of the assembly hole (13) is adapted to the diameter of the bolt, and the length of the assembly hole (13) is greater than the diameter of the bolt.

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