Mounting structure of trailer hook and electric bicycle

Abstract

The utility model provides a mounting structure of a trailer hook and an electric bicycle, the mounting structure of the trailer hook is used for mounting the trailer hook of the electric bicycle on a rear wheel motor of the electric bicycle, the trailer hook is provided with a connecting through hole, the surface of the rear wheel motor is provided with a connecting stand column, and the mounting structure of the trailer hook further comprises a switching part and a fixing part; the switching part is a cylindrical body, two axial ends of the switching part are respectively provided with a first end face and a second end face which are opposite to each other, the first end face is provided with a connecting concave hole, the connecting stand column extends into the connecting concave hole and is fixedly connected in the connecting concave hole so as to fix the switching part and the rear wheel motor together, and the fixing part is arranged in the connecting through hole in a penetrating manner. And the connecting part is fixedly connected to the second end surface, so that the trailer hook and the connecting part are fixedly connected together. The trailer hook can be conveniently installed on the rear wheel motor, and meanwhile installation firmness and reliability between the trailer hook and the rear wheel motor can be guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of electric bicycle manufacturing, and particularly relates to an installation structure of a trailer hitch and an electric bicycle. Background Art

[0002] An electric bicycle combines the functions of an electric vehicle and a bicycle. In actual manufacturing, it is usually necessary to connect a trailer hitch to the rear-wheel motor. In the prior art, there is a connecting through hole on the trailer hitch and a connecting column on the rear-wheel motor. However, the diameters of the connecting through hole and the connecting column are usually different, so it is impossible to connect the trailer hitch and the rear-wheel motor by using the connecting through hole and the connecting column, resulting in very difficult installation work between the two. Content of the Utility Model

[0003] The purpose of the utility model is to provide an installation structure of a trailer hitch and an electric bicycle, which is not only convenient for installing the trailer hitch on the rear-wheel motor, but also can ensure the firmness and reliability of the installation between the two.

[0004] To achieve the above purpose, the technical solution adopted by the utility model is:

[0005] An installation structure of a trailer hitch is used to install the trailer hitch of an electric bicycle on the rear-wheel motor of the electric bicycle. There is a connecting through hole on the trailer hitch, and a connecting column is arranged on the surface of the rear-wheel motor. It also includes: an adapter component and a fixing component;

[0006] The adapter component is a columnar body, and its two ends in the axial direction respectively have opposite first end face and second end face. A connecting concave hole is arranged on the first end face. The connecting column extends into the connecting concave hole and is fixedly connected within the connecting concave hole to fix the adapter component and the rear-wheel motor together. The fixing component is inserted through the connecting through hole and is fixedly connected to the second end face to fixedly connect the trailer hitch and the adapter component together.

[0007] Preferably, an external thread is arranged on the surface of the connecting column, and an internal thread matching the external thread is arranged on the inner wall of the connecting concave hole, so that the connecting column is threadedly connected within the connecting concave hole.

[0008] Preferably, the outer contour shape of the adapter component in the cross-section perpendicular to the axis of the connecting concave hole is a polygon.

[0009] Preferably, in the cross-section perpendicular to the axis of the connecting concave hole, the shape of the connecting concave hole is an ellipse or a polygon, and the shape of the connecting column matches the shape of the connecting concave hole.

[0010] Preferably, it further includes a positioning screw;

[0011] On the side wall of the connecting concave hole, a positioning screw hole is provided with an axis perpendicular to the axis of the connecting concave hole and matching the positioning screw. The positioning screw is threadedly connected in the positioning screw hole and abuts against the surface of the connecting column.

[0012] Preferably, the fit between the connecting column and the connecting concave hole is a transition fit or an interference fit.

[0013] Preferably, the fixing member includes a stud and a nut matching the stud;

[0014] One end of the stud is fixedly connected to the second end face, and the other end extends in a direction away from the second end face. The trailer hitch is sleeved on the stud through the connecting through hole, and the nut is threadedly connected to the stud to fix the trailer hitch on the second end face.

[0015] Preferably, the fixing member is a fixing screw;

[0016] On the second end face, a fixing screw hole matching the fixing screw is provided. The fixing screw passes through the connecting through hole and is threadedly connected in the fixing screw hole to fix the trailer hitch on the second end face.

[0017] Preferably, the fixing member includes a connecting rod and a buckle;

[0018] One end of the connecting rod is fixedly connected to the second end face, and the other end extends in a direction away from the second end face. The buckle is fixedly connected to the end of the connecting rod away from the second end face and is made of an elastic material. The trailer hitch is sleeved on the connecting rod through the connecting through hole, and the buckle is located on the side of the trailer hitch facing away from the second end face to detachably fix the trailer hitch on the second end face.

[0019] An electric bicycle includes an installation structure of a trailer hitch having any of the above technical features.

[0020] The installation structure of the trailer hitch of the present utility model adopts the technical solution that the adapter component is a columnar body, and the two ends of its axis respectively have opposite first end face and second end face. A connecting concave hole is arranged on the first end face, and the connecting column extends into the connecting concave hole and is fixedly connected within the connecting concave hole to fix the adapter component and the rear-wheel motor together. The fixing component is inserted into the connecting through hole and fixedly connected to the second end face to fixedly connect the trailer hitch and the adapter component together. This technical solution not only facilitates the installation of the trailer hitch on the rear-wheel motor, but also ensures the firmness and reliability of the installation between the two. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the installation structure of the trailer hitch in Embodiment 1;

[0022] Figure 2 is Figure 1 the sectional view taken along line A-A in

[0023] Figure 3 It is a schematic diagram of the installation structure of the trailer hitch in Embodiment 2;

[0024] Figure 4 is Figure 2 the sectional view taken along line B-B in

[0025] Figure 5 It is a schematic diagram of the installation structure of the trailer hitch in Embodiment 3.

[0026] In the figure: 1 - trailer hitch; 2 - rear-wheel motor; 3 - connecting through hole; 4 - connecting column; 5 - adapter component; 6 - fixing component; 7 - first end face; 8 - second end face; 9 - connecting concave hole; 10 - positioning screw; 11 - positioning screw hole; 12 - stud; 13 - nut; 14 - fixing screw 15 - connecting rod; 16 - buckle; 17 fixing screw hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] In order to make the purpose, technical solutions and advantages of the present utility model clearer, the installation structure of the trailer hitch of the present utility model and the electric bicycle 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 utility model and are not used to limit the present utility model.

[0028] As shown in Figure 1 and 3, as shown in FIGS. 5, an installation structure of a trailer hitch is used to install the trailer hitch 1 of an electric bicycle on the rear-wheel motor 2 of the electric bicycle. The trailer hitch 1 has a connecting through-hole 3, and a connecting column 4 is provided on the surface of the rear-wheel motor 2. It also includes: an adapter member 5 and a fixing member 6. The adapter member 5 is a columnar body, and the two ends of its axis respectively have opposite first end faces 7 and second end faces 8. A connecting concave hole 9 is provided on the first end face 7. The connecting column 4 extends into the connecting concave hole 9 and is fixedly connected within the connecting concave hole 9 to fix the adapter member 5 and the rear-wheel motor 2 together. The fixing member 6 is inserted into the connecting through-hole 3 and is fixedly connected to the second end face 8 to fixedly connect the trailer hitch 1 and the adapter member 5 together. Adopting such a technical solution not only facilitates the installation of the trailer hitch 1 on the rear-wheel motor 2, but also ensures the firmness and reliability of the installation between the two. The following will respectively describe the installation structure of the trailer hitch in detail through several alternative embodiments:

[0029] Embodiment 1

[0030] The connection method between the adapter member 5 and the connecting column 4 is as follows: As Figure 1 shown, an external thread is provided on the surface of the connecting column 4, and an internal thread matching the external thread is provided on the inner wall of the connecting concave hole 9, so that the connecting column 4 is threadedly connected within the connecting concave hole 9. This not only facilitates the connection of the adapter member 5 to the connecting column 4, but also enables the firmness of the connection between the two. Further, as Figure 2 shown, the outer contour shape of the adapter member 5 in the cross-section perpendicular to the axis of the connecting concave hole 9 is a polygon (such as a regular hexagon). In this way, the operator can use an adjustable wrench to rotate the adapter member 5 to achieve the installation or disassembly between it and the connecting column 4.

[0031] The connection method between the trailer hitch 1 and the adapter member 5 is as follows: As Figure 1 shown, the fixing member 6 includes a stud 12 and a nut 13 matching the stud 12. One end of the stud 12 is fixedly connected to the second end face 8, and the other end extends in a direction away from the second end face 8. The trailer hitch 1 is sleeved on the stud 12 through the connecting through-hole 3, and the nut 13 is threadedly connected to the stud 12 to fix the trailer hitch 1 on the second end face 8. This can not only facilitate the installation and disassembly of the trailer hitch 1 and the adapter member 5, but also ensure the firmness of the connection between the two.

[0032] Embodiment 2

[0033] The connection method between the adapter member 5 and the connecting column 4 is as follows: As Figure 3 , 4As shown in the figure, in the cross-section perpendicular to the axis of the connecting concave hole 9, the shape of the connecting concave hole 9 is oval or polygonal, and the shape of the connecting column 4 matches the shape of the connecting concave hole 9. In actual production, the connection between the connecting column 4 and the connecting concave hole 9 is a transition fit or an interference fit to ensure the firmness of the connection between the two.

[0034] The connection mode between the trailer hitch 1 and the adapter component 5 is as follows: as Figure 3 shown, the fixing component 6 is a fixing screw 14. A fixing screw hole 17 matching the fixing screw 14 is provided on the second end face 8. The fixing screw 14 passes through the connecting through hole 3 and is threadedly connected within the fixing screw hole 17 to fix the trailer hitch 1 on the second end face 8. This can not only facilitate the installation and disassembly of the trailer hitch 1 and the adapter component 5, but also ensure the firmness of the connection between the two.

[0035] Embodiment III

[0036] The connection mode between the adapter component 5 and the connecting column 4 is as follows: as Figure 5 shown, it further includes a positioning screw 10. A positioning screw hole 11 with an axis perpendicular to the axis of the connecting concave hole 9 and matching the positioning screw 10 is provided on the side wall of the connecting concave hole 9. The positioning screw 10 is threadedly connected within the positioning screw hole 11 and abuts against the surface of the connecting column 4. The connection between the connecting column 4 and the connecting concave hole 9 can adopt a transition fit or an interference fit to ensure the firmness of the connection between the adapter component 5 and the connecting column 4.

[0037] The connection mode between the trailer hitch 1 and the adapter component 5 is as follows: as Figure 5 shown, the fixing component 6 includes a connecting rod 15 and a buckle 16. One end of the connecting rod 15 is fixedly connected to the second end face 8, and the other end extends in a direction away from the second end face 8. The buckle 16 is fixedly connected to the end of the connecting rod 15 away from the second end face 8 and is made of an elastic material. The trailer hitch 1 is sleeved on the connecting rod 15 through the connecting through hole 3, and the buckle 16 is located on the side of the trailer hitch 1 facing away from the second end face 8 to detachably fix the trailer hitch 1 on the second end face 8. During installation, the buckle 16 extends into the connecting through hole 3 from the side of the trailer hitch 1 facing the second end face 8 and undergoes elastic deformation under the extrusion of the side wall of the connecting through hole 3. When the buckle 16 passes through the connecting through hole 3, it returns to its natural state by relying on its own elastic force.

[0038] To achieve the invention purpose, the present utility model further provides an electric bicycle, including the installation structure of the trailer hitch described in any of the above embodiments.

[0039] The above-described embodiments merely represent several implementation manners of the present utility model. The description thereof is relatively specific and detailed, but it should not be construed as a limitation to the scope of the patent of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several modifications and improvements can still be made, and these all belong to the protection scope of the present utility model. Therefore, the protection scope of the patent of the present utility model shall be subject to the appended claims.

Claims

1. An installation structure of a trailer hitch for installing the trailer hitch (1) of an electric bicycle on the rear-wheel motor (2) of the electric bicycle. The trailer hitch (1) has a connecting through-hole (3), and a connecting upright column (4) is arranged on the surface of the rear-wheel motor (2). It is characterized in that: It further includes: an adapter component (5) and a fixing component (6); The adapter component (5) is a columnar body, and the two opposite ends of its axis respectively have a first end face (7) and a second end face (8). A connecting concave hole (9) is arranged on the first end face (7). The connecting upright column (4) extends into the connecting concave hole (9) and is fixedly connected within the connecting concave hole (9) to fix the adapter component (5) and the rear-wheel motor (2) together. The fixing component (6) is inserted into the connecting through-hole (3) and is fixedly connected to the second end face (8) to fixedly connect the trailer hitch (1) and the adapter component (5) together.

2. The installation structure of the trailer hitch according to claim 1, characterized in that: External threads are arranged on the surface of the connecting upright column (4), and internal threads matching the external threads are arranged on the inner wall of the connecting concave hole (9) so that the connecting upright column (4) is threadedly connected within the connecting concave hole (9).

3. The installation structure of the trailer hitch according to claim 2, characterized in that: The outer contour shape of the adapter component (5) in the cross-section perpendicular to the axis of the connecting concave hole (9) is a polygon.

4. The installation structure of the trailer hitch according to claim 1, characterized in that: In the cross-section perpendicular to the axis of the connecting concave hole (9), the shape of the connecting concave hole (9) is an ellipse or a polygon, and the shape of the connecting upright column (4) matches the shape of the connecting concave hole (9).

5. The installation structure of the trailer hitch according to claim 1, characterized in that: It further includes a positioning screw (10); Positioning screw holes (11) with axes perpendicular to the axis of the connecting concave hole (9) and matching the positioning screw (10) are arranged on the side wall of the connecting concave hole (9). The positioning screw (10) is threadedly connected within the positioning screw hole (11) and abuts against the surface of the connecting upright column (4).

6. The installation structure of the trailer hitch according to claim 1, characterized in that: The connection between the connecting upright column (4) and the connecting concave hole (9) is a transition fit or an interference fit.

7. The installation structure of the trailer hitch according to any one of claims 1 to 6, characterized in that: The fixing component (6) includes a stud (12) and a nut (13) matching the stud (12); One end of the stud (12) is fixedly connected to the second end face (8), and the other end extends in a direction away from the second end face (8). The trailer hitch (1) is sleeved on the stud (12) through the connection through-hole (3), and the nut (13) is threadedly connected to the stud (12) to fix the trailer hitch (1) on the second end face (8).

8. The mounting structure of the trailer hitch according to any one of claims 1 to 6, characterized in that: The fixing member (6) is a fixing screw (14); A fixing screw hole (17) matching the fixing screw (14) is provided on the second end face (8). The fixing screw (14) passes through the connection through-hole (3) and is threadedly connected within the fixing screw hole (17) to fix the trailer hitch (1) on the second end face (8).

9. The mounting structure of the trailer hitch according to any one of claims 1 to 6, characterized in that: The fixing member (6) includes a connecting rod (15) and a buckle (16); One end of the connecting rod (15) is fixedly connected to the second end face (8), and the other end extends in a direction away from the second end face (8). The buckle (16) is fixedly connected to the end of the connecting rod (15) away from the second end face (8) and is made of an elastic material. The trailer hitch (1) is sleeved on the connecting rod (15) through the connection through-hole (3), and the buckle (16) is located on the side of the trailer hitch (1) facing away from the second end face (8) to removably fix the trailer hitch (1) on the second end face (8).

10. An electric bicycle, characterized in that: It includes the mounting structure of the trailer hitch according to any one of claims 1 to 9.

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