A battery car trunk

Abstract

This utility model provides a tail box for an electric bicycle, including a tail box body, bolts, and connectors. The tail box body has a waist hole, and a buffer component is provided above the waist hole. The buffer component includes a main body with a bolt passage area corresponding to the waist hole. Several elastic portions are provided on both sides of the bolt passage area. When the tail box is in the installed state, the bolt passes through both the bolt passage area and the waist hole, and the bolt head end face contacts the elastic portions on the buffer component. In this utility model, by adding a buffer component with elastic portions above the waist hole, when the electric bicycle travels over bumpy roads, the longitudinal impact first acts on the frame and is then transmitted to the buffer component through the bolts. At this time, the elastic portions of the buffer component deform under stress, transforming the rigid impact force that originally acted directly on the bottom of the tail box into a flexible buffer force, significantly reducing the intensity of the impact energy transmission and preventing the impact from directly acting on the tail box body, thereby reducing the risk of cracking at the connection points of the tail box body.

Description

Technical Field

[0001] This utility model relates to the field of electric vehicle technology, and in particular to a tail box for electric vehicles. Background Technology

[0002] Existing electric bicycles have a tail box installed at the rear, which can be used to store items and facilitate carrying them.

[0003] Existing tail boxes typically have bolt holes at the bottom, directly connecting the bottom of the tail box to the frame of the electric scooter. However, this direct bolt-fixing method lacks adequate cushioning between the tail box and the frame. When the scooter travels over bumpy roads, the longitudinal impact from the bumps is transmitted directly to the bottom of the tail box through the bolts. Since existing tail boxes are usually made of plastic, a material with weak impact resistance, prolonged exposure to road vibrations can cause stress concentration at the bolt connection point, leading to cracks. With continued use, these cracks will gradually widen, eventually rendering the tail box unusable. Summary of the Invention

[0004] The purpose of this utility model is to address the shortcomings of the existing technology and provide a tail box for electric vehicles.

[0005] The purpose of this utility model is achieved through the following technical solution: a tail box for an electric vehicle, including a tail box body, bolts, and connectors. The tail box body is provided with a waist hole, and a buffer is provided above the waist hole. The buffer includes a main body, and the main body is provided with a bolt passage area corresponding to the waist hole. Several elastic parts are provided on both sides of the bolt passage area. When the tail box is in the installed state, the bolt passes through the bolt passage area and the waist hole at the same time, and the bolt head end face contacts the elastic part on the buffer.

[0006] Preferably, the elastic part includes an elastic arm, one end of which is connected to the main body, and the other end of which is provided with a contact part for contacting the end face of the bolt head.

[0007] Preferably, the angle between the elastic arm and the main body is 45°-50°.

[0008] Preferably, the elastic part is integrally formed with the main body.

[0009] Preferably, the main body has bending portions on both sides, and the waist hole has grooves on both sides, with the bending portions fitting into the grooves.

[0010] Preferably, the buffer is made of spring steel.

[0011] Preferably, the bottom of the tail box body is provided with reinforcing ribs, which are triangular in structure.

[0012] Preferably, a flexible pad is provided on the lower end surface of the tail box body.

[0013] Preferably, the flexible pad includes a central flexible pad and an annular flexible pad. The central flexible pad is rectangular and located at the center of the lower end face of the tail box body. The annular flexible pad is circular and located around the central flexible pad.

[0014] Preferably, the flexible pad is made of rubber.

[0015] The beneficial effects of this utility model are as follows: In this utility model, by adding a buffer with an elastic part above the waist hole, when the electric vehicle travels over a bumpy road, the longitudinal impact first acts on the frame and then is transmitted to the buffer through the bolts; at this time, the elastic part of the buffer will deform due to the force, transforming the rigid impact force that originally acted directly on the bottom of the tail box into a flexible buffer force, greatly reducing the intensity of the impact energy transmission, avoiding the impact from acting directly on the plastic tail box body, reducing the vibration load borne by the tail box from the source, and thus reducing the risk of cracking at the connection of the tail box body. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model.

[0017] Figure 2 This is a schematic diagram of the structure at the bottom of the tailgate.

[0018] Figure 3 for Figure 1 Enlarged view of section A.

[0019] Figure 4 This is a structural diagram of the buffer component and bolts.

[0020] Figure 5 This is a schematic diagram of the buffer component.

[0021] Figure 6 This is a front view of the buffer component connected to the bolt.

[0022] In the diagram: 1. Tail box body; 1-1. Waist hole; 1-2. Reinforcing rib; 1-3. Central flexible pad; 1-4. Annular flexible pad; 1-5. Groove; 2. Bolt; 2-1. Bolt head end face; 3. Buffer; 3-1. Main body; 3-2. Bolt passage area; 3-3. Elastic part; 3-3a. Elastic arm; 3-3b. Contact part; 3-4. Bending part. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model are within the protection scope of the present utility model.

[0024] like Figures 1 to 6 As shown, a tail box for an electric vehicle includes a tail box body 1, bolts 2, and connectors. The tail box body 1 has a waist hole 1-1, and a buffer 3 is provided above the waist hole 1-1. The buffer 3 includes a main body 3-1, and a bolt passage area 3-2 corresponding to the waist hole 1-1 is provided on the main body 3-1. Several elastic parts 3-3 are provided on both sides of the bolt passage area 3-2. When the tail box is in the installed state, the bolt 2 passes through the bolt passage area 3-2 and the waist hole 1-1 at the same time, and the bolt head end face 2-1 of the bolt 2 contacts the elastic parts 3-3 on the buffer 3.

[0025] In this utility model, by adding a buffer 3 with an elastic part 3-3 above the waist hole 1-1, when the electric vehicle travels over a bumpy road, the longitudinal impact first acts on the frame and is then transmitted to the buffer 3 through the bolt 2. At this time, the elastic part 3-3 of the buffer 3 will deform due to the force, transforming the rigid impact force that originally acted directly on the bottom of the tail box into a flexible buffer force, greatly reducing the intensity of the impact energy transmission, avoiding the impact from acting directly on the plastic tail box body 1, reducing the vibration load on the tail box from the source, and thus reducing the risk of cracking at the connection of the tail box body 1.

[0026] The main body 3-1 has a sheet-like structure and is in surface contact with the tail box body 1. The buffer 3 prevents the bolt head end face 2-1 from directly contacting the bottom of the tail box, but instead contacts the elastic part 3-3 on the buffer 3. Through the surface contact between the main body 3-1 of the buffer 3, the stress-bearing area is expanded, reducing stress concentration and further reducing the risk of cracking at the connection between the bolt 2 and the tail box body 1.

[0027] The elastic part 3-3 includes an elastic arm 3-3a, one end of which is connected to the main body 3-1, and the other end of which has a contact part 3-3b for contacting the bolt head end face 2-1. The elastic arm 3-3a possesses the mechanical properties of a cantilever beam. When the bolt 2 is installed, the bolt head end face 2-1 presses against the contact part 3-3b, generating pressure, causing the elastic arm 3-3a to bend elastically to a certain extent. When the longitudinal impact from a bump is transmitted to the contact part 3-3b through the bolt 2, the contact part 3-3b transmits stress to the corresponding elastic arm 3-3a. Because the elastic arm 3-3a has a cantilever structure and is deformable, the stress is transmitted to the main body 3-1 through the elastic arm 3-3a. The deformation of the elastic arm 3-3a generates a reaction force (i.e., axial elastic force) along the axial direction of the bolt 2, and the degree of deformation of the elastic arm 3-3a changes with pressure, thus achieving a buffering process.

[0028] In this embodiment, the included angle between the elastic arm 3-3a and the main body 3-1 is 45°-50°.

[0029] The elastic part 3-3 is integrally formed with the main body 3-1. The elastic part 3-3 can be manufactured by die stamping.

[0030] The main body 3-1 has bending portions 3-4 on both sides, and the waist hole 1-1 has grooves 1-5 on both sides. The bending portions 3-4 are inserted into the grooves 1-5. The bending portions 3-4 are perpendicular to the main body 3-1, and the bending portions 3-4 are inserted into the grooves 1-5 on both sides of the waist hole 1-1 and press against the groove wall of the groove 1-5, so that the buffer 3 is connected to the tail box body 1 and the buffer 3 is prevented from detaching from the tail box body 1.

[0031] In this embodiment, the buffer 3 is made of spring steel.

[0032] The bottom of the tailgate body 1 is provided with reinforcing ribs 1-2. The reinforcing ribs 1-2 are strip-shaped protrusions arranged in multiple directions along the bottom of the tailgate body 1. The reinforcing ribs 1-2 effectively improve the overall strength of the bottom of the tailgate body 1, enhance its resistance to deformation, and reduce the risk of cracking at the bottom of the tailgate. In this embodiment, the reinforcing ribs 1-2 have a triangular structure.

[0033] A flexible pad is provided on the lower end surface of the tail box body 1. Specifically, the flexible pad includes a central flexible pad 1-3 and an annular flexible pad 1-4. The central flexible pad 1-3 is rectangular and located at the center of the lower end surface of the tail box body 1; the annular flexible pad 1-4 is circular and located around the central flexible pad 1-3. An annular positioning groove and a rectangular positioning groove are provided on the lower end surface of the tail box body 1. The central flexible pad 1-3 is embedded in the rectangular positioning groove, and the annular flexible pad 1-4 is embedded in the annular positioning groove. The bottom of the tail box body 1 contacts the electric vehicle frame through the annular flexible pad 1-4 and the central flexible pad 1-3. The presence of the flexible pad provides a certain degree of vibration isolation between the tail box body 1 and the electric vehicle frame.

[0034] In this embodiment, the flexible pad is made of rubber.

[0035] This utility model is not limited to the above-described preferred embodiments. Anyone can derive other forms of products under the guidance of this utility model. However, regardless of any changes made in their shape or structure, any technical solution that is the same as or similar to this application falls within the protection scope of this utility model.

Claims

1. A tail box for an electric vehicle, characterized in that, The device includes a tail box body, bolts, and connectors. The tail box body has a waist hole, and a buffer is provided above the waist hole. The buffer includes a main body, and the main body has a bolt passage area corresponding to the waist hole. Several elastic parts are provided on both sides of the bolt passage area. When the tail box is in the installed state, the bolt passes through the bolt passage area and the waist hole at the same time, and the bolt head end face contacts the elastic part on the buffer.

2. The tail box of an electric vehicle according to claim 1, characterized in that, The elastic part includes an elastic arm, one end of which is connected to the main body, and the other end of which is provided with a contact part for contacting the end face of the bolt head.

3. The tail box of an electric vehicle according to claim 2, characterized in that, The angle between the elastic arm and the main body is 45°-50°.

4. The tail box of an electric vehicle according to claim 2, characterized in that, The elastic part is integrally formed with the main body.

5. The tail box of an electric vehicle according to claim 2, characterized in that, The main body has bending portions on both sides, and the waist hole has grooves on both sides, with the bending portions fitting into the grooves.

6. The tail box of an electric vehicle according to claim 1, characterized in that, The buffer is made of spring steel.

7. The tail box of an electric vehicle according to claim 1, characterized in that, The bottom of the tail box body is provided with reinforcing ribs, which are triangular in structure.

8. The tail box of an electric vehicle according to claim 1, characterized in that, A flexible pad is provided on the lower end surface of the tail box body.

9. The tail box of an electric vehicle according to claim 8, characterized in that, The flexible pad includes a central flexible pad and an annular flexible pad. The central flexible pad is rectangular and located at the center of the lower end face of the tail box body. The annular flexible pad is circular and located around the central flexible pad.

10. The tail box of an electric vehicle according to claim 9, characterized in that, The flexible pad is made of rubber.

Images