High-strength aluminum alloy bicycle frame with double battery bins

Abstract

A high-strength aluminum alloy bicycle frame with double battery bins comprises a head tube, an upper tube assembly, a lower tube, a seat tube, a rear fork and a bottom bracket, one end of the upper tube assembly is connected with the head tube, and the other end of the upper tube assembly is connected with the rear fork; the bottom of the seat tube is connected with the lower tube, and the rear fork comprises two rear fork arms; a connecting base is arranged between the two rear fork arms, and the two ends of the connecting base are fixed to the two rear forks respectively. One end of the lower pipe is connected with the head pipe, and the other end of the lower pipe is connected with the connecting seat; a first battery box fixedly connected with the upper pipe assembly is arranged on the upper pipe assembly, and a second battery box fixedly connected with the lower pipe assembly is arranged on the lower pipe assembly. The lower tube is directly connected with the rear fork through the connecting seat, so that the structure of the whole frame is simplified, and the whole mass of a bicycle body is reduced while the structural strength is ensured; and the battery boxes are arranged on the upper tube and the lower tube, so that the endurance of the electric bicycle is enhanced.

Description

TECHNICAL FIELD

[0001] The utility model relates to electric bicycle field especially a kind of high-strength aluminum alloy bicycle frame with double battery compartment. BACKGROUND

[0002] The utility model discloses a kind of electric bicycle frames of Chinese patent announcement No. CN207902658U, including frame front pipe, frame main pipe, battery, frame seat pipe, five-way and frame rear fork structure;Frame front pipe is equipped with line hole on both sides;Frame main pipe is set to the rear of frame front pipe, and one end of frame main pipe is connected with frame front pipe;Battery mounting cavity for installing battery is equipped in frame main pipe;Frame main pipe is equipped with the opening for facilitating installation battery on pipe body upper portion, and the lower portion of pipe body is extended and is equipped with an arc block on both sides of pipe body, and the pipe body of two arc blocks and frame main pipe forms U-shaped wire containing groove;Through hole is set on the pipe body in wire containing groove;Five-way is set to the connecting place of frame main pipe, frame seat pipe and frame rear fork structure, and frame seat pipe is set between frame main pipe and frame rear fork structure;Frame rear fork structure is set to the rear of frame seat pipe.Currently, electric bicycle on market is generally connected by five-way and lower pipe, seat pipe and rear lower fork, increase the structure cost, also increase the weight of vehicle body. SUMMARY

[0003] The utility model solves the problems of providing a kind of high-strength aluminum alloy bicycle frame with double battery compartment, simplifies rear fork structure, reduces the overall quality of vehicle body while ensuring the overall structural strength of vehicle body.

[0004] To solve the above technical problems, the technical scheme adopted by the utility model is: a kind of high-strength aluminum alloy bicycle frame with double battery compartment, including head tube, upper pipe assembly, lower pipe, seat pipe, rear fork and five-way, one end of the upper pipe assembly is connected with head tube, the other end of the upper pipe assembly is connected with rear fork;The bottom of the seat pipe is connected with the lower pipe, and the rear fork includes two rear fork arms;Connecting seat is provided between the two rear fork arms, and the two ends of the connecting seat are fixed on the two rear forks respectively, the lower pipe includes first connecting section and second connecting section, the front end of the first connecting section is connected with head tube, the rear end of the first connecting section is inclined downward and connected with the second connecting section, the rear end of the second connecting section is inclined upward and connected with the connecting seat;The five-way is fixed at the bottom of the connecting place of first connecting section and second connecting section;The first battery box fixedly connected with the upper pipe assembly is provided on the upper pipe assembly, and the second battery box fixedly connected with the lower pipe is provided on the lower pipe.The principle of the utility model is: the lower pipe is directly connected with the rear fork by the connecting seat, the structure of the overall frame is simplified, the overall quality of vehicle body is reduced while ensuring the structural strength;Battery box is provided on the upper pipe and the lower pipe, which enhances the endurance of electric bicycle.

[0005] As improvement, the upper tube assembly comprises a first upper tube and a second upper tube, the front end of the first upper tube is welded with the head tube, the tail end of the first upper tube is welded with the front end of the second upper tube, the tail end of the second upper tube is downwardly inclined and welded with the rear fork, and the second upper tube is parallel with the first connecting section; the first battery box is fixed on the second upper tube by screws.

[0006] As improvement, the front end of the rear fork arm is welded with the second upper tube and the seat tube respectively.

[0007] As improvement, the second battery box is fixed on the first connecting section by screws.

[0008] As improvement, the both sides of the five-way joint are provided with reinforcing sheets, and the reinforcing sheets are welded with the five-way joint and the lower tube respectively.

[0009] The utility model has the advantages that the rear fork structure is simplified, the overall frame weight is low, the structural strength is high, and the two battery boxes enhance the endurance in use. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 It is the structural schematic diagram of the utility model.

[0011] Figure 2 It is the structural schematic diagram of the rear fork.

[0012] Mark explanation in drawing: 1, head tube; 2, upper tube assembly; 21, first upper tube; 22, second upper tube; 221, first battery box; 3, lower tube; 31, first connecting section; 311, second battery box; 32, second connecting section; 4, seat tube; 5, rear fork arm; 51, connecting seat; 6, five-way joint; 61, reinforcing sheet. DETAILED DESCRIPTION

[0013] The utility model will be further explained in detail in combination with the drawings of the specification.

[0014] As Figure 1 , 2As shown, a high-strength aluminum alloy bicycle frame with double battery compartments comprises a head tube 1, an upper tube assembly 2, a lower tube 3, a seat tube 4, a rear fork, and a five-way pipe 6; one end of the upper tube assembly 2 is welded to the upper part of the head tube 1, the other end of the upper tube assembly 2 is welded to the rear fork and the seat tube 4, the rear fork comprises two rear fork arms 5 welded on both sides of the upper tube assembly 2, and the seat tube 4 is welded to the end of the upper tube assembly 2; a connecting seat 51 is arranged between the two rear fork arms 5, and both ends of the connecting seat 51 are welded to the two rear fork arms 5; the lower tube 3 comprises a first connecting section 31 and a second connecting section 32, the front end of the first connecting section 31 is welded to the lower part of the head tube 1, the tail end of the first connecting section 31 is inclined downward and connected to the front end of the second connecting section 32, and the tail end of the second connecting section 32 is inclined upward and welded to the connecting seat 51; the first connecting section 31 and the second connecting section 32 are integrally formed; the structural strength of the entire lower tube 3 is enhanced. The five-way pipe 6 is welded to the bottom of the connection between the first connecting section 31 and the second connecting section 32, and reinforcing sheets 61 are further arranged on both sides of the five-way pipe 6, and the reinforcing sheets 61 are welded to the five-way pipe 6 and the lower tube 3 respectively; the two reinforcing sheets 61 can not only strengthen the connection between the five-way pipe 6 and the lower tube 3, but also enhance the structural strength at the lower tube 3.

[0015] The upper tube assembly 2 comprises a first upper tube 21 and a second upper tube 22, the front end of the first upper tube 21 is welded to the head tube 1, the tail end of the first upper tube 21 is welded to the front end of the second upper tube 22, and the tail end of the second upper tube 22 is inclined downward and welded to the rear fork. In order to enhance the endurance of the electric bicycle, two battery boxes are arranged on the second upper tube 22, the first battery box 221 is connected to the second upper tube 22 through screws, and the second battery box 311 is connected to the first connecting section 31 through screws. In order to ensure the appearance and rationality of the overall structure, the second upper tube 22 is parallel to the first connecting section 31, so that the placement angles of the first battery box 221 and the second battery box 311 are reasonable. The bottom of the seat tube 4 is welded to the second connecting section 32, and the top of the seat tube 4 is used for placing a cushion for a user. The upper tube, the lower tube 3, the seat tube 4, the rear fork, and the head tube 1 are all aluminum alloy parts, which reduces the overall structure weight while ensuring high overall structural strength.

[0016] The utility model principle: the lower tube 3 is directly connected to the rear fork from the head tube 1, which simplifies the structure and reduces the weight of the frame, the frame is made of high-strength aluminum alloy, which ensures the overall structural strength of the frame; by arranging battery boxes on the lower tube 3 and the upper tube, the endurance of the utility model in use is enhanced.

Claims

1. A high strength aluminum alloy bicycle frame with dual battery compartments, comprising a head tube, an upper tube assembly, a down tube, a seat tube, a rear fork and a bottom bracket, one end of the upper tube assembly is connected with the head tube, the other end of the upper tube assembly is connected with the rear fork; the bottom of the seat tube is connected with the down tube, the rear fork comprises two rear fork arms; characterized in that: Two rear fork arms are provided with a connecting seat, two ends of the connecting seat are fixed on the two rear forks respectively, the lower tube comprises a first connecting section and a second connecting section, a front end of the first connecting section is connected with the head tube, a rear end of the first connecting section is inclined downward and connected with the second connecting section, a rear end of the second connecting section is inclined upward and connected with the connecting seat; the five-way pipe is fixed at the bottom of the connection between the first connecting section and the second connecting section; the upper tube assembly is provided with a first battery box fixedly connected therewith, and the lower tube is provided with a second battery box fixedly connected therewith.

2. The high-strength aluminum alloy bicycle frame with dual battery compartments of claim 1, wherein: The upper tube assembly comprises a first upper tube and a second upper tube, a front end of the first upper tube is welded with the head tube, a tail end of the first upper tube is welded with a front end of the second upper tube, a tail end of the second upper tube is inclined downward and welded with the rear fork, and the second upper tube is parallel with the first connecting section; the first battery box is fixed on the second upper tube by screws.

3. The high-strength aluminum alloy bicycle frame with dual battery compartments of claim 2, wherein: Front ends of the rear fork arms are respectively welded with the second upper tube and the seat tube.

4. The high-strength aluminum alloy bicycle frame with dual battery compartments of claim 2, wherein: The second battery box is fixed on the first connecting section by screws.

5. The high-strength aluminum alloy bicycle frame with dual battery compartments of claim 1, wherein: Both sides of the five-way pipe are provided with reinforcing sheets, the reinforcing sheets are respectively welded with the five-way pipe and the lower tube. Both sides of the five-way pipe are provided with reinforcing sheets, the reinforcing sheets are respectively welded with the five-way pipe and the lower tube.

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