Bicycle frame

Abstract

A bicycle frame comprises a front frame body and a rear frame body, the front frame body comprises a head tube, a frame tube and a middle tube, the head tube, the frame tube and the middle tube are fixedly connected through welding, and a fixedly-connected reinforcing plate is arranged between the middle tube and the frame tube; the rear frame comprises an upper fork and a lower fork, and a connecting seat, a connecting rod piece and a shock absorber are sequentially arranged at the front end of the upper fork from back to front; the automobile seat cushion is stable in structure, good in comfort and capable of providing good experience feeling for users.

Description

Technical Field

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

[0002] my country has a large population, and transportation is a big problem. Bicycles are becoming more and more popular because they are convenient, take up little space, and can effectively reduce fuel pollution to the atmosphere. However, during riding, there will be bumps and impacts on the road, so a more stable frame structure and certain shock absorption functions are required. How to increase the overall strength of the frame while having a good shock absorption effect has become an urgent problem to be solved in the design of electric bicycles. Summary of the invention

[0003] The problem to be solved by the utility model is to provide a bicycle frame, the whole frame structure is stable, the shock absorbing effect is good, and the user experience can be improved.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: a bicycle frame, including a front frame and a rear frame, the front frame includes a head tube, a frame tube and a middle 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 fixedly connected to the middle tube and the five-way; the rear frame includes an upper fork and a lower fork, the tail end of the upper fork is fixedly connected to the tail end of the lower fork, the upper fork is connected to the connecting rod sheet through a connecting seat, the upper fork is fixedly connected to one end of the connecting seat, and the other end of the connecting seat is hinged to the connecting rod sheet; two symmetrical split pieces are provided on the middle tube The reinforcing plate of the cloth is L-shaped, and the reinforcing plate includes a side portion and a bottom portion, the side portion is fixedly connected to the middle tube, the width of the side portion gradually increases from bottom to top, and the bottom portion is fixed at the rear end bend of the frame tube, the reinforcing plate is hinged to the connecting rod sheet, a shock absorber is provided between the connecting rod sheet and the reinforcing plate, one end of the shock absorber is hinged to the connecting rod sheet, and the other end of the shock absorber is hinged to the reinforcing plate; the front end of the lower fork is connected to the middle tube through a five-way bracket, the five-way bracket is fixed to the bottom of the middle tube, an articulated seat is provided on the five-way bracket, and the front end of the lower fork is articulated to the articulated seat through a rotating shaft. The overall structure of the utility model is stable and can bring better comfort to users.

[0005] As an improvement, the connecting seat is provided with symmetrically distributed connecting grooves, the connecting rod plate is provided with a first connecting hole, a second connecting hole and a third connecting hole, the connecting rod plate is triangular, and the first connecting hole, the second connecting hole and the third connecting hole are respectively arranged at the three corners of the connecting rod plate; the first connecting hole is hinged to the connecting groove; the reinforcing plate is provided with a fourth connecting hole and a fifth connecting hole, the second connecting hole is hinged to the fourth connecting hole, and the third connecting hole and the fifth connecting hole are respectively hinged to the two ends of the shock absorber.

[0006] As an improvement, a through hole is provided on the connecting rod sheet.

[0007] As an improvement, the lower fork includes a lower fork arm and a shaft sleeve, the lower fork arm is welded and fixed to the shaft sleeve, the hinge seat includes two mounting plates, the shaft sleeve is arranged between the two mounting plates and is hinged to the two mounting plates.

[0008] As an improvement, the tail end of the upper fork is connected to the tail end of the lower fork via a hook.

[0009] The beneficial effects of the utility model are as follows: by adding a reinforcing plate between the middle tube and the frame tube, the structural strength of the vehicle body is enhanced; the reinforcing plate is connected with the shock absorber and the connecting rod plate, the shock absorbing effect is effectively reduced, and the user's experience is improved; the utility model has a stable structure and strong comfort, and can provide users with a better experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a side view of the utility model.

[0011] Figure 2 A top view of the upper fork and the connecting seat.

[0012] Figure 3 Bottom view of the chainstay, bottom bracket and mounting bracket.

[0013] Explanation of the numbers in the figure: 1. head tube; 2. frame tube; 3. middle tube; 31. reinforcement plate; 32. bottom bracket; 4. upper fork; 41. connecting seat; 411. connecting groove; 42. connecting rod plate; 43. shock absorber; 5. lower fork; 51. articulated seat; 52. hook claw. Implementation

[0014] The utility model is further described in detail below in conjunction with the accompanying drawings of the specification;

[0015] like Figure 1 As shown, a bicycle frame includes a front frame and a rear frame, wherein the front frame includes a head pipe 1, a frame pipe 2 and a middle pipe 3, the front end of the frame pipe 2 is fixed to the head pipe 1 by welding, and the rear end of the frame pipe 2 is bent and respectively welded to the middle pipe 3 and the bottom bracket 32.

[0016] like Figure 1 , 2As shown in Figure 3, the rear frame includes an upper fork 4 and a lower fork 5, the tail end of the upper fork 4 and the tail end of the lower fork 5 are connected by a hook 52, and the front end of the upper fork 4 is provided with a connecting seat 41, a connecting rod plate 42 and a shock absorber 43 in sequence from back to front; the front end of the upper fork 4 is welded and fixed to the tail end of the connecting seat 41, and the connecting seat 41 is provided with symmetrically distributed connecting grooves 411, the connecting rod plate 42 is triangular, and the three corners of the connecting rod plate 42 are respectively provided with a first connecting hole, a second connecting hole and a third connecting hole, the connecting rod plate 42 extends into the connecting groove 411 and makes the first connecting hole hinged with the connecting groove 411; the middle tube 3 is provided with a reinforcing plate 31, and the reinforcing plate 31 is L-shaped. 31 includes a side portion and a bottom portion, the side portion is welded to the side wall of the middle tube 3, and the bottom portion is welded to the frame tube 2. The reinforcing plate 31 can strengthen the structural strength of the connection between the middle tube 3 and the frame tube 2, thereby enhancing the structural strength of the entire frame and improving the safety of users when using it; the reinforcing plate 31 is provided with a fourth connecting hole and a fifth connecting hole, and the fourth connecting hole is hinged with the second connecting hole to complete the connection between the reinforcing plate 31 and the connecting rod sheet 42. The shock absorber 43 is arranged between the connecting rod sheet 42 and the reinforcing plate 31, and the third connecting hole and the fifth connecting hole are hinged to the two ends of the shock absorber 43 respectively; the shock absorber 43 effectively reduces the vibration caused by road bumps during user use, thereby improving the user's comfort. The front end of the lower fork 5 is connected to the middle tube 3 via a five-way bracket 32, and the five-way bracket 32 ​​is provided with an articulated seat 51 welded and fixed thereto, and the articulated seat 51 includes two mounting plates, and the lower fork 5 includes a lower fork 5 arm and a shaft sleeve, and the lower fork 5 arm is welded and fixed to the shaft sleeve, and the shaft sleeve is arranged between the two mounting plates and is hinged to the two mounting plates via a rotating shaft.

[0017] The utility model increases the structural strength of the vehicle body by adding a reinforcing plate 31 between the middle tube 3 and the frame tube 2; the reinforcing plate 31 is connected with the shock absorber 43 and the connecting rod sheet 42, which effectively reduces the shock absorbing effect. The overall frame structure of the utility model is stable and comfortable, which can improve the user's experience.

Claims

1. A bicycle frame, comprising a front frame and a rear frame, characterized in that: The front frame comprises a head tube, a frame tube and a middle 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 fixedly connected to the middle tube and the bottom bracket; The rear frame comprises an upper fork and a lower fork, the tail end of the upper fork is fixedly connected to the tail end of the lower fork, the upper fork is connected to the connecting rod plate through a connecting seat, the upper fork is fixedly connected to one end of the connecting seat, and the other end of the connecting seat is hinged to the connecting rod plate; two symmetrically distributed reinforcing plates are provided on the middle tube, and the reinforcing plate is L-shaped, and the reinforcing plate comprises side parts and a bottom part, the side parts are fixedly connected to the middle tube, the width of the side parts gradually increases from bottom to top, and the bottom is fixed at the rear end bending part of the frame tube, the reinforcing plate is hinged to the connecting rod plate, a shock absorber is provided between the connecting rod plate and the reinforcing plate, one end of the shock absorber is hinged to the connecting rod plate, and the other end of the shock absorber is hinged to the reinforcing plate; the front end of the lower fork is connected to the middle tube through a five-way bracket, the five-way bracket is fixed to the bottom of the middle tube, an articulated seat is provided on the five-way bracket, and the front end of the lower fork is hinged to the articulated seat through a rotating shaft.

2. A bicycle frame according to claim 1, characterized in that: The connecting seat is provided with symmetrically distributed connecting grooves, and the connecting rod plate is provided with a first connecting hole, a second connecting hole and a third connecting hole. The connecting rod plate is triangular in shape, and the first connecting hole, the second connecting hole and the third connecting hole are respectively arranged at the three corners of the connecting rod plate; the first connecting hole is hinged to the connecting groove; the reinforcing plate is provided with a fourth connecting hole and a fifth connecting hole, the second connecting hole is hinged to the fourth connecting hole, and the third connecting hole and the fifth connecting hole are respectively hinged to the two ends of the shock absorber.

3. A bicycle frame according to claim 2, characterized in that: The connecting rod sheet is provided with a through hole.

4. A bicycle frame according to claim 1, characterized in that: The lower fork comprises a lower fork arm and a shaft sleeve, wherein the lower fork arm is fixed to the shaft sleeve by welding, and the hinge seat comprises two mounting plates, wherein the shaft sleeve is arranged between the two mounting plates and is hinged to the two mounting plates.

5. A bicycle frame according to claim 1, characterized in that: The tail end of the upper fork is connected with the tail end of the lower fork through a hook claw.

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