Electric bicycle frame

Abstract

An electric bicycle frame comprises a front bicycle frame body, a rear bicycle frame body and a motor mounting shell arranged between the front bicycle frame body and the rear bicycle frame body, and the front bicycle frame body comprises a head pipe, an upper pipe, a bicycle frame pipe and a vertical pipe; one end of the upper tube is fixedly connected with the frame tube, a clamping groove is formed between the frame tube and the bottom of the upper tube, and two mounting plates are arranged in the clamping groove; the rear frame comprises an upper fork, a lower fork and a middle tube, the upper fork, the lower fork and the middle tube define a triangular structure, and a connecting seat and a shock absorber are sequentially arranged at the front end of the upper fork. The utility model has the advantages of stable structure and high comfort, and can bring better experience to users.

Description

Technical Field

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

[0002] my country has a large population, and transportation is a big problem. Bicycles and electric bicycles are becoming more and more popular because they are convenient, take up little space, and can effectively reduce fuel pollution to the atmosphere.

[0003] Since electric bicycles have a higher average speed than ordinary bicycles, they will face greater road bumps and impacts during riding, so the frame must be stable enough. How to increase the overall strength of the frame has become an urgent problem to be solved in the design of electric bicycles. Summary of the invention

[0004] The problem to be solved by the utility model is to provide an electric bicycle frame with good shock absorption effect, while ensuring the stability of the overall structure of the frame and improving the user's comfort.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is: an electric bicycle frame, comprising a front frame, a rear frame and a motor mounting shell arranged between the front frame and the rear frame, the front frame comprising a head tube, an upper tube, a frame tube and a seat tube; one end of the upper tube is fixedly connected to the frame tube, a slot is formed between the frame tube and the bottom of the upper tube, two mounting plates are arranged in the slot, the mounting plates are fixedly connected to the upper tube and the frame tube respectively, the mounting plate comprises four side edges, one side edge is fixedly connected to the bottom of the upper tube and extends to the seat tube; another side edge is fixedly connected to the frame tube, and two other side edges form an angle; the other end of the upper tube is fixedly connected to the seat tube The seat tube is fixedly connected, the front end of the frame tube is fixedly connected to the head tube, and the tail end of the frame tube is bent and connected to the motor mounting shell; the rear frame includes an upper fork, a lower fork and a middle tube, and the upper fork, the lower fork and the middle tube form a triangular structure, the tail end of the upper fork is fixedly connected to the tail end of the lower fork, the front end of the upper fork is fixedly connected to one end of the middle tube through a connecting seat, and the other end of the middle tube is fixedly connected to the front end of the lower fork; a shock absorber is provided between the mounting plate and the connecting seat, one end of the shock absorber is hinged to the connecting seat, and the other end of the shock absorber is arranged at the angle of the mounting plate and hinged to the mounting plate; an articulated seat is provided on the motor mounting shell, and the front end of the lower fork is articulated to the articulated seat. The utility model has a stable structure, high comfort, and can give users a better experience.

[0006] As an improvement, a reinforcement block is provided between the top of the upper tube and the frame tube, and the reinforcement block is respectively welded and fixed to the upper tube and the frame tube.

[0007] As an improvement, the lower fork includes a shaft sleeve and two lower fork arms, and the two lower fork arms are welded to the shaft sleeve; the articulated seat includes two connecting plates, and the shaft sleeve is arranged between the two connecting plates and is hinged to the two connecting plates through a rotating shaft.

[0008] As an improvement, the mounting plate is provided with a plurality of through holes.

[0009] As an improvement, the tail end of the upper fork and the tail end of the rear fork are connected by a hook.

[0010] The beneficial effects of the utility model are as follows: by installing a mounting plate between the upper tube and the frame tube, the impact force of the shock absorber on the upper tube and the frame tube is reduced, thereby reducing the force on the entire frame; the overall structure of the utility model is stable, the user's use experience can be optimized, and the comfort is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of the utility model.

[0012] Figure 2 A top view of the upper fork.

[0013] Figure 3 Bottom view of the housing for the lower fork and motor.

[0014] Explanation of the numbers in the figure: 1. head tube; 2. frame tube; 3. upper tube; 31. support block; 4. seat tube; 5. motor mounting shell; 51. hinge seat; 6. shock absorber; 61. connecting plate; 7. upper fork; 71. connecting seat; 8. middle tube; 9. lower fork; 91. lower fork arm; 92. bushing; 93. hook claw. DETAILED DESCRIPTION

[0015] The utility model is further described in detail below in conjunction with the accompanying drawings of the specification;

[0016] like Figure 1 , 2 As shown in Figure 3, an electric bicycle frame includes a front connector, a rear connector and a motor mounting shell 5 arranged between the front connector and the rear connector. The front connector includes a head tube 1, a frame tube 2, an upper tube 3 and a seat tube 4 from front to back. The front end of the frame tube 2 is fixedly connected to the head tube 1, and the rear end of the frame tube 2 is fixedly connected to the motor mounting shell 5; the front end of the upper tube 3 is fixed to the frame tube 2, and the end of the upper tube 3 is connected to the seat tube 4. A support block 31 is provided between the top of the upper tube 3 and the frame tube 2. During braking, the seat tube 4 will drive the end of the upper tube 3 to move forward, which is easy to cause the upper tube 3 to deform. The support block 31 can reduce the possibility of this situation and ensure the structural stability of the front connector.

[0017] like Figure 1As shown, the rear connector includes an upper fork 7, a lower fork 9 and a middle tube 8, and the rear connector is of a triangular structure. The end of the upper fork 7 is connected to the end of the lower fork 9 by a hook 93, the front end of the upper fork 7 is welded to the upper end of the middle tube 8 by a connecting seat 71, the lower end of the middle tube 8 is welded to the front end of the lower fork 9, the lower fork 9 includes two lower fork arms 91 and a shaft sleeve 92 welded to the lower fork arm 91 at the front end of the lower fork arm 91, and the lower end of the middle tube 8 is welded to the shaft sleeve 92; the motor mounting shell 5 is provided with a hinge seat 51, and the hinge seat 51 includes two connecting plates 61, and the shaft sleeve 92 is provided between the two connecting plates 61 and is hinged to the two connecting plates 61 through a rotating shaft. A connecting plate 61 is provided between the lower part of the upper tube 3 and the frame tube 2, and a shock absorber 6 is provided between the connecting plate 61 and the connecting seat 71. The connecting plate 61 includes four sides, two of which are respectively welded and fixed to the upper tube 3 and the frame tube 2, and the other two sides form an angle. One end of the shock absorber 6 is hinged to the connecting seat 71, and the other end of the shock absorber 6 is provided at the angle of the connecting plate 61 and is hinged to the connecting plate 61. During the braking process, the user will feel the impact force brought by the rear end of the vehicle body, and the shock absorber 6 can reduce the impact force brought by the rear end of the vehicle body; the connecting plate 61 can reduce the impact force transmitted by the shock absorber 6, thereby making the impact force felt by the user smaller; and the connecting plate 61 is fixedly connected to both the upper tube 3 and the frame tube 2, and the impact force transmitted by the connecting plate 61 is shared by the upper tube 3 and the frame tube 2, thereby ensuring the stability of the entire vehicle body.

[0018] The utility model reduces the inertial force received by the user when braking by setting a shock absorber 6 between the rear connector and the front connector, thereby optimizing the user's experience of use; a connecting plate 61 is provided between the upper tube 3 and the frame tube 2 to connect the shock absorber 6, thereby reducing the impact force transmitted from the shock absorber 6 and distributing the impact force to the upper tube 3 and the frame tube 2, thereby avoiding deformation caused by the force being borne by one tube alone, thereby increasing the stability of the entire vehicle body; the utility model has a stable structure and good comfort, and can bring users a better experience.

Claims

1. An electric bicycle frame, comprising a front frame, a rear frame and a motor mounting housing disposed between the front frame and the rear frame, characterized in that: The front frame comprises a head tube, an upper tube, a frame tube and a seat tube; one end of the upper tube is fixedly connected to the frame tube, a slot is formed between the frame tube and the bottom of the upper tube, two mounting plates are arranged in the slot, the mounting plates are fixedly connected to the upper tube and the frame tube respectively, the mounting plate comprises four side edges, one side edge is fixedly connected to the bottom of the upper tube and extends to the seat tube; another side edge is fixedly connected to the frame tube, and two other side edges form an angle; the other end of the upper tube is fixedly connected to the seat tube; the front end of the frame tube is fixedly connected to the head tube, and the rear end of the frame tube is bent and connected to the motor mounting shell; The rear frame comprises an upper fork, a lower fork and a middle tube, wherein the upper fork, the lower fork and the middle tube form a triangular structure, the tail end of the upper fork is fixedly connected to the tail end of the lower fork, the front end of the upper fork is fixedly connected to one end of the middle tube via a connecting seat, and the other end of the middle tube is fixedly connected to the front end of the lower fork; A shock absorber is provided between the mounting plate and the connecting seat, one end of the shock absorber is hinged to the connecting seat, and the other end of the shock absorber is provided at the angle of the mounting plate and hinged to the mounting plate; The motor mounting shell is provided with an articulated seat, and the front end of the lower fork is articulated with the articulated seat.

2. An electric bicycle frame as claimed in claim 1, characterized in that: A reinforcement block is arranged above the upper tube and between the frame tube, and the reinforcement block is respectively welded and fixed to the upper tube and the frame tube.

3. An electric bicycle frame as claimed in claim 1, characterized in that: The lower fork comprises a shaft sleeve and two lower fork arms, and the two lower fork arms are welded to the shaft sleeve; the hinge seat comprises two connecting plates, and the shaft sleeve is arranged between the two connecting plates and hinged to the two connecting plates.

4. An electric bicycle frame as claimed in claim 1, characterized in that: The mounting plate is provided with a plurality of through holes.

5. The electric bicycle frame according to claim 1, characterized in that: The tail end of the upper fork and the tail end of the rear fork are connected through hooks.

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