Electric bicycle frame

Abstract

An electric bicycle frame comprises a lower pipe, a head pipe fixed to one end of the lower pipe, a mounting frame fixed to the other end of the lower pipe, supporting frames symmetrically distributed on the two sides of the bottom of the mounting frame, a bottom bracket fixed to the lower pipe and a lower fork hinged to the bottom bracket. The supporting frame comprises first supporting pipes and second supporting pipes arranged at the bottoms of the first supporting pipes, a cavity is formed between the two first supporting pipes and the mounting frame, a battery box is arranged in the cavity, and a fixing assembly for fixing the battery box is arranged on the mounting frame. A user can load goods conveniently, and practicability is high; the structure is stable, and the user driving experience is good.

Description

Technical Field

[0001] The utility model relates to the field of bicycle frames, in particular to an electric bicycle frame. Background Art

[0002] The existing bicycle frames generally mainly play a role of main support and have no other additional functions. Some existing improvement technologies generally focus on the strength of the frame, making the functions of the frame single. However, with the acceleration of the pace of life, there are more and more fields such as deliverymen using electric vehicles to transport goods. People's demand for electric vehicles equipped with structures for loading goods is increasing. Most electric vehicles either do not have a structure for loading goods or have an unstable and impractical structure. Summary of the Invention

[0003] The problem to be solved by the utility model is to provide an electric bicycle frame that can load goods, has strong structural stability, and can give users a good driving experience.

[0004] To solve the above technical problems, the technical solution adopted by the utility model is: an electric bicycle frame, including a down tube, a head tube fixed at one end of the down tube, a mounting bracket fixed at the other end of the down tube, support frames symmetrically distributed on both sides of the bottom of the mounting bracket, a bottom bracket fixed on the down tube, and a down fork hinged to the bottom bracket; the down tube is U-shaped and includes a front part, a middle part, and a rear part connected in sequence. The front part of the down tube is fixedly connected to the head tube, the bottom bracket is fixed in the middle part of the down tube, the rear part of the down tube is fixedly connected to the mounting bracket, a pedal is arranged between the front part and the rear part of the down tube, one end of the pedal is fixedly connected to the front part of the down tube, and the other end of the pedal is fixedly connected to the rear part of the down tube; the support frame includes a first support tube and a second support tube arranged at the bottom of the first support tube. One end of the first support tube is fixedly connected to the down tube, and the other end of the first support tube is fixedly connected to the mounting bracket. A cavity is formed between the two first support tubes and the mounting bracket, and a battery box is arranged in the cavity. A fixing component for fixing the battery box is arranged on the mounting bracket. Both ends of the fixing component are fixed on the mounting bracket, and the fixing component is fixedly connected to the battery box; one end of the second support tube is fixedly connected to the down tube, and the other end of the second support tube is fixedly connected to the first support tube. The down fork includes two down fork tubes. One end of the down fork tube is hinged to the bottom bracket through a hinge seat, and a tail fork fixedly connected thereto is arranged at the other end of the down fork tube. A shock absorber is arranged between the tail fork and the second support tube. One end of the shock absorber is hinged to the second support tube, and the other end of the shock absorber is hinged to the tail fork. The principle of the utility model: The user can place goods on the mounting bracket, and the bottom of the mounting bracket is provided with a support structure, which can enable the mounting bracket to bear a large load-bearing strength, is practical, and has a stable structure; the shock absorber below the mounting bracket can also buffer the impact of the goods on the mounting bracket on the whole vehicle body, and the driving experience of the user is good.

[0005] As an improvement, the fixing component is welded to the bottom of the mounting frame. The fixing component includes a first fixing plate and a second fixing plate, and the battery box is fixedly connected to the first fixing plate and the second fixing plate through screws.

[0006] As an improvement, there are more than two mounting plates on the mounting frame, and both ends of the mounting plate are welded to the mounting frame.

[0007] As an improvement, a hinge shaft is provided on the second support tube. Both ends of the hinge shaft pass through two second support tubes and are fixedly welded thereto, and the shock absorber is hinged to the hinge shaft.

[0008] As an improvement, the support frame further includes a third support tube provided between the first support tube and the lower tube. One end of the third support tube is welded to the lower tube, and the other end of the third support tube is fixedly welded to the bottom of the first support tube.

[0009] As an improvement, the hinge seat includes a fixing portion fixed on the bottom bracket and a hinge portion provided between the fixing portions. Both ends of the hinge portion are hinged to the fixing portions, and the two lower fork tubes are welded to the hinge portion.

[0010] As an improvement, a reinforcing block is provided between the head tube and the lower tube, and the reinforcing block is fixedly welded to the head tube and the lower tube respectively.

[0011] As an improvement, a reinforcing tube is provided between the two lower fork tubes, and both ends of the reinforcing tube are welded to the two lower fork tubes.

[0012] As an improvement, two fourth support tubes are provided at the bottom of the pedal. One end of the fourth support tube is welded to the front part of the lower tube, and the other end of the fourth support tube is welded to the rear part of the lower tube.

[0013] As an improvement, a vehicle lamp fixedly connected thereto is provided at the tail end of the mounting frame.

[0014] The beneficial effects of the present utility model are as follows:

[0015] 1. It is convenient for users to load goods and has strong practicability;

[0016] 2. The structure of the present utility model is stable, and the driving experience of users is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of the present utility model.

[0018] Figure 2 is a schematic structural diagram of the mounting frame.

[0019] Figure 3 is a schematic structural diagram of the lower fork and the bottom bracket.

[0020] Figure 4 It is a schematic structural diagram of the second support pipe.

[0021] Figure 5 It is a schematic structural diagram of the first fixing plate.

[0022] Figure 6 It is a schematic structural diagram of the second fixing plate.

[0023] Explanation of the reference numerals in the figure: 1. Head tube; 11. Reinforcing block; 2. Lower tube; 21. Pedal; 22. Fourth support tube; 23. Bottom bracket; 231. Fixing part; 232. Hinge part; 3. Mounting bracket; 31. Mounting plate; 32. First fixing plate; 33. Second fixing plate; 34. Headlight; 4. First support tube; 41. Battery box; 42. Third support tube; 5. Second support tube; 51. Hinge shaft; 6. Lower fork tube; 61. Rear fork; 62. Shock absorber; 63. Reinforcing tube. Embodiment

[0024] The present utility model will be further described in detail below in conjunction with the accompanying drawings of the specification;

[0025] As Figures 1 to 4 shown, an electric bicycle frame includes a lower tube 2, a head tube 1 fixed to one end of the lower tube 2, a mounting bracket 3 fixed to the other end of the lower tube 2, support frames symmetrically distributed on both sides of the bottom of the mounting bracket 3, a bottom bracket 23 fixed to the lower tube 2, and a lower fork hinged to the bottom bracket 23; the lower tube 2 is U-shaped, the lower tube 2 includes a front part, a middle part and a rear part connected in sequence, the front part of the lower tube 2 is welded to the head tube 1, a reinforcing block 11 is provided between the lower tube 2 and the head tube 1, and the reinforcing block 11 is welded to the head tube 1 and the lower tube 2 respectively to improve the structural strength at the head tube 1; the bottom bracket 23 is welded to the middle part of the lower tube 2, the rear part of the lower tube 2 is fixed to the mounting bracket 3 through a connecting plate, a pedal 21 is provided between the front part and the rear part of the lower tube 2, the front end of the pedal 21 is welded to the front part of the lower tube 2, the tail end of the pedal 21 is welded to the rear part of the lower tube 2, and two fourth support tubes 22 for supporting the pedal 21 are provided at the bottom of the pedal 21, which can improve the load-bearing strength of the pedal 21 and prevent the pedal 21 from collapsing due to excessive force.

[0026] As Figures 1 to 6As shown, a plurality of mounting plates 31 are provided on the mounting frame 3. Both ends of the mounting plate 31 are welded to the mounting frame 3. The mounting plate 31 facilitates the user to install the seat and fix the goods, with strong practicability. A vehicle lamp 34 fixedly connected thereto is provided at the rear end of the mounting frame 3. Symmetrically distributed support frames are provided on both sides of the bottom of the mounting frame 3. The support frame includes a first support pipe 4, a second support pipe 5, and a third support pipe 42 disposed between the first support pipe 4 and the second support pipe 5. The two first support pipes 4, the two second support pipes 5, and the two third support pipes 42 correspond to each other one by one. One end of the first support pipe 4 is welded to the rear part of the lower pipe 2, and the other end of the first support pipe 4 is welded to the bottom of the mounting frame 3. A cavity is formed among the mounting frame 3, the lower pipe 2, and the two first support pipes 4. A battery box 41 is provided in the cavity. A fixing assembly for fixing the battery box 41 is further provided at the bottom of the mounting frame 3. The fixing assembly includes a first fixing plate 32 and a second fixing plate 33. The first fixing plate 32 is located in the middle area of the battery box 41. Both ends of the first fixing plate 32 are welded to the mounting frame 3. The first fixing plate 32 and the battery box 41 are fixedly connected by a screw. The second fixing plate 33 is located at the tail end area of the battery box 41. Both ends of the second fixing plate 33 are welded to the mounting frame 3. The second fixing plate 33 and the battery box 41 are fixedly connected by a screw. Through the coordinated cooperation of the first fixing plate 32 and the second fixing plate 33, the battery box 41 can be firmly fixed in the cavity, avoiding problems such as poor power supply caused by the loosening of the battery box 41. One end of the second support pipe 5 is welded to the bottom of the first support pipe 4, and the other end of the second support pipe 5 is welded to the lower pipe 2. One end of the third support pipe 42 is welded to the lower pipe 2, and the other end of the third support pipe 42 is welded to the bottom of the first support pipe 4. The second support pipe 5 and the third support pipe 42 can strengthen the structural strength of the bottom of the mounting frame 3, avoiding damage to the mounting frame 3 or the battery box 41 due to excessive weight of the goods on the mounting frame 3.

[0027] As Figure 1 , 3As shown in FIGS. 4, a hinge seat is provided on the five-way joint 23. The hinge seat includes a hinge portion 232 and a fixing portion 231. The fixing portion 231 is welded to the five-way joint 23. The hinge portion 232 is hinged to the fixing portion 231, and the hinge portion 232 is welded and fixed to the lower fork. A bridge piece is provided at the front end of the lower fork. The lower fork includes two lower fork tubes 6. A tail fork 61 fixedly connected thereto is provided at the tail end of the lower fork tube 6. A shock absorber 62 is provided between the tail fork 61 and the second support tube 5. A hinge shaft 51 is provided between the two second support tubes 5. Both ends of the hinge shaft 51 pass through the two second support tubes 5 and are welded to the two second support tubes 5. One end of the shock absorber 62 is hinged to the hinge shaft 51, and the other end of the shock absorber 62 is hinged to the tail fork 61. The shock absorber 62 can buffer the impact force brought by the goods or people on the mounting frame 3 to the entire vehicle body, making the overall structure of the vehicle frame more stable. At the same time, it can also buffer the impact force received by the user and improve the user's usage experience. A reinforcing tube 63 welded thereto is provided between the two lower fork tubes 6 to improve the overall strength of the lower fork tubes 6.

[0028] Principle of the present utility model: Place the goods on the mounting frame 3 or the seat cushion, so that the user can use the electric bicycle to place the goods, and it has strong practicability. A shock absorber 62 and multiple support tubes are provided at the bottom of the mounting frame 3, which can improve the structural strength of the entire vehicle body and improve the user's driving experience.

Claims

1. An electric bicycle frame, characterized in that: It includes a down tube, a head tube fixed to one end of the down tube, a mounting bracket fixed to the other end of the down tube, support brackets symmetrically distributed on both sides of the bottom of the mounting bracket, a bottom bracket fixed to the down tube, and a lower fork hinged to the bottom bracket; the down tube is U-shaped and includes a front part, a middle part, and a rear part connected in sequence. The front part of the down tube is fixedly connected to the head tube, the bottom bracket is fixed to the middle part of the down tube, the rear part of the down tube is fixedly connected to the mounting bracket, a pedal is provided between the front part and the rear part of the down tube, one end of the pedal is fixedly connected to the front part of the down tube, and the other end of the pedal is fixedly connected to the rear part of the down tube; the support bracket includes a first support tube and a second support tube provided at the bottom of the first support tube. One end of the first support tube is fixedly connected to the down tube, and the other end of the first support tube is fixedly connected to the mounting bracket. A cavity is formed between the two first support tubes and the mounting bracket, and a battery box is provided in the cavity. A fixing component for fixing the battery box is provided on the mounting bracket. Both ends of the fixing component are fixed to the mounting bracket, and the fixing component is fixedly connected to the battery box; one end of the second support tube is fixedly connected to the down tube, and the other end of the second support tube is fixedly connected to the first support tube. The lower fork includes two lower fork tubes. One end of the lower fork tube is hinged to the bottom bracket through a hinge seat, and a tail fork fixedly connected thereto is provided at the other end of the lower fork tube. A shock absorber is provided between the tail fork and the second support tube. One end of the shock absorber is hinged to the second support tube, and the other end of the shock absorber is hinged to the tail fork.

2. The electric bicycle frame according to claim 1, wherein: The fixing component is welded to the bottom of the mounting bracket. The fixing component includes a first fixing plate and a second fixing plate, and the battery box is fixedly connected to the first fixing plate and the second fixing plate through screws.

3. The electric bicycle frame according to claim 1, wherein: Two or more mounting plates are provided on the mounting bracket, and both ends of the mounting plate are welded to the mounting bracket.

4. The electric bicycle frame according to claim 1, characterized in that: A hinge shaft is provided on the second support tube. Both ends of the hinge shaft pass through the two second support tubes and are welded and fixed thereto, and the shock absorber is hinged to the hinge shaft.

5. The electric bicycle frame according to claim 1, characterized in that: The support bracket further includes a third support tube provided between the first support tube and the down tube. One end of the third support tube is welded to the down tube, and the other end of the third support tube is welded and fixed to the bottom of the first support tube.

6. The electric bicycle frame according to claim 1, characterized in that: The hinge seat includes a fixing part fixed to the bottom bracket and a hinge part provided between the fixing parts. Both ends of the hinge part are hinged to the fixing parts, and the two lower fork tubes are welded to the hinge part.

7. The electric bicycle frame according to claim 1, wherein: A reinforcing block is provided between the head tube and the down tube, and the reinforcing block is welded and fixed to the head tube and the down tube respectively.

8. The electric bicycle frame according to claim 1, wherein: A reinforcing tube is provided between the two lower fork tubes, and both ends of the reinforcing tube are welded to the two lower fork tubes.

9. The electric bicycle frame according to claim 1, characterized in that: Two fourth support tubes are provided at the bottom of the pedal. One end of the fourth support tube is welded to the front part of the down tube, and the other end of the fourth support tube is welded to the rear part of the down tube.

10. The electric bicycle frame according to claim 1, characterized in that: A vehicle lamp fixedly connected thereto is provided at the tail end of the mounting bracket.

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