Folding structure of folding bicycle

Abstract

The improved folding structure of the folding bicycle is composed of a front bicycle frame, a rear bicycle frame, a rotating fulcrum and a positioning assembly, the front bicycle frame is provided with an upper rod part, the front end of the front bicycle frame is provided with a handlebar and a front fork, the lower end of the front bicycle frame is provided with the rotating fulcrum, the rear bicycle frame is composed of symmetrical plates and comprises a vertical rod part, the upper end of the vertical rod part is connected with a rotating fulcrum shaft, and the lower end of the vertical rod part is provided with a chain wheel. The rear wheel is linked through a chain and a flywheel, the front frame and the rear frame can rotate through a rotating fulcrum, the positioning assembly is in shaft connection with the upper rod part and comprises a switch capable of controlling the buckling part, and the positioning assembly can be buckled with or separated from the fixing rod of the rear frame so as to achieve the unfolding or folding function. During unfolding, the buckling part is buckled with the fixing rod to keep stable; during folding, the buckling parts are loosened, so that the front frame and the rear frame rotate along the rotating fulcrums and get close to each other, and compact storage is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a folding bicycle, in particular to a folding structure of a folding bicycle. BACKGROUND

[0002] The current folding bicycle mainly relies on the pivoting mechanism in the central frame to achieve the folding function of the front and rear wheels.

[0003] However, the folded folding bicycle still occupies a lot of storage space. How to solve the problem of space occupation after folding the existing folding bicycle has become a technical problem that needs to be solved in the industry. UTILITY MODEL CONTENTS

[0004] The utility model discloses a folding structure of a folding bicycle. The folding structure of the folding bicycle mainly sets the pivoting structure at the predetermined position of the vertical pipe, can make the front wheel and the rear wheel close after folding, provides a more compact storage mode, and is provided with a positioning assembly that can stably support the unfolded bicycle body, so that the folding bicycle is easier to use and more stable during use.

[0005] Technical scheme: the folding structure of the folding bicycle is composed of a front frame, a rear frame, a rotating support point and a positioning assembly, wherein:

[0006] The front frame comprises an upper rod part, the upper rod part is provided with a handlebar at the front end, the handlebar is provided with a front fork at the lower end, the front fork is connected with a front wheel through a shaft, the upper rod part of the front frame is provided with a seat cushion on the side opposite to the front wheel, and the rotating support point is arranged at the lower end of the upper rod part;

[0007] The rear frame is composed of two symmetrical plate parts, the rear frame comprises a vertical rod part, the upper end of the vertical rod part is connected with the rotating support point through a shaft, the lower end of the vertical rod part is provided with a sprocket, the sprocket is provided with a set of pedals, a freewheel is arranged at the end away from the vertical rod part, a chain is arranged on the sprocket and the freewheel, the sprocket and the freewheel form flexible transmission, the freewheel is connected with a rear wheel through a shaft, and the rear wheel is driven to rotate through flexible transmission, thereby driving the folding bicycle to displace, and a fixing rod is arranged on the rear frame;

[0008] The rotating support point is internally provided with a bearing, so that the front frame and the rear frame rotate around the rotating support point as the center;

[0009] The positioning assembly is connected to the predetermined position of the upper rod part, the positioning assembly is provided with a buckle part, the buckle part is loosened or buckled through a switch, and the buckle part can be buckled or separated from the fixing rod, so that the front frame and the rear frame can be folded close or unfolded;

[0010] Accordingly, when in use, the front frame and the rear frame are unfolded, and the buckle part of the positioning assembly is buckled on the fixing rod of the rear frame, so that the unfolding and stability effect is achieved; when in storage, the buckle part is loosened, so that the fixing rod is unlocked, and then the front frame and the rear frame are rotated along the rotating pivot and close to each other, so that the front frame and the rear frame can be stored compactly.

[0011] In the embodiment of the utility model, the upper rod part is composed of a rectangular frame body, and a plurality of supporting ribs are arranged inside the upper rod part.

[0012] In the embodiment of the utility model, the front fork is a frame body structure, and a plurality of supporting ribs are arranged inside the frame body.

[0013] In the embodiment of the utility model, a plurality of supporting ribs are arranged inside the plate members.

[0014] In the embodiment of the utility model, the wheel rim of the front wheel and the rear wheel is a triangular shape formed by three plate members.

[0015] In the embodiment of the utility model, a seat pipe is arranged below the seat cushion, the seat pipe is a plate member in the shape of M, the plate member is connected to the upper rod part through a pivot connection part, and one end of the positioning assembly is coaxially connected to the pivot connection part of the plate member.

[0016] In the embodiment of the utility model, the positioning assembly sequentially comprises two groups of parallel connection plates from top to bottom, the lower end of the connection plate is connected to a shock absorber, and the buckle part is connected to the lower end of the shock absorber.

[0017] In the embodiment of the utility model, the vertical rod part is in an arc shape.

[0018] Beneficial effects: the folding structure of the folding bicycle disclosed by the utility model has the following beneficial effects:

[0019] 1. The front frame and the rear frame utilize the rotating pivot to achieve the storage effect of closely closing to each other, the use amount of the storage space is reduced, and the operation is more intuitive;

[0020] 2. The positioning assembly can be combined with the shock absorber to adapt to various riding environments;

[0021] 3. The front frame and the rear frame are provided with supporting ribs in the frame body, so that the weight of the bicycle body can be reduced;

[0022] 4. The rotating pivot is further provided with a fixing buckle to fix the rotating angle and prevent loosening. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is a perspective view of the utility model.

[0024] Figure 2 It isFigure 1 Another perspective view.

[0025] Figure 3 Structure diagram of the present application.

[0026] Figure 4 Structure enlarged view of the positioning assembly.

[0027] Figure 5 Usage schematic view (1) of the positioning assembly.

[0028] Figure 6 Usage schematic view (2) of the positioning assembly.

[0029] Figure 7 Schematic view of the present application after folding.

[0030] Figure 8 Schematic view of the present application in actual use.

[0031] Among them:

[0032] 1 - front frame 11 - upper bar portion 12 - handlebar 13 - front fork 14 - front wheel 15 - seat cushion 151 - seat tube 16 - sheet metal member 161 - pivot portion 2 - rear frame 21 - plate member 22 - vertical bar portion 23 - sprocket 24 - footrest 25 - freewheel 26 - chain 27 - rear wheel 28 - fixed bar 3 - rotation fulcrum 4 - positioning assembly 41 - connecting plate 42 - shock absorber 43 - clamping portion 431 - switch DETAILED DESCRIPTION

[0033] The specific embodiments of the present application will be described in detail below.

[0034] As Figures 1 to 3 shown, the folding structure of the folding bicycle disclosed by the present application is composed of the following components: a front frame 1, a rear frame 2, a rotating pivot 3, and a positioning assembly 4, wherein:

[0035] The front frame 1 comprises an upper rod portion 11, the upper rod portion 11 is provided with a handlebar 12 at the front end, the handlebar 12 is provided with a front fork 13 at the lower end, the front fork 13 is connected with a front wheel 14 through a shaft, and the upper rod portion 11 of the front frame 1 is provided with a seat cushion 15 at the side opposite to the front wheel 14, and the rotating pivot 3 is arranged at the lower end of the upper rod portion 11.

[0036] Please continue to refer to Figures 1 to 3 , the seat cushion 15 is provided with a seat tube 151 below, the seat tube 151 is installed on a plate metal piece 16 in the shape of M, the plate metal piece 16 is connected to the upper rod portion 11 through a pivot connection portion 161, and one end of the positioning assembly 4 is coaxially connected with the pivot connection portion 161 of the plate metal piece 16.

[0037] It should be additionally explained here that Figures 1 to 7 for the convenience of explanation, the upper rod portion 11 and the front fork 13 form a basket-shaped frame, and the actual structure is as shown in Figure 8 , a plurality of supporting ribs are arranged on the upper rod portion 11 and the front fork 13, accordingly, compared with the conventional folding bicycle, the structure of the present application can further reduce the weight, and is convenient for carrying and transporting.

[0038] As Figures 1 to 3 shown, the rear frame 2 is composed of two symmetrically arranged plate members 21, which include a vertical rod portion 22, the upper end of which is connected to the rotating pivot 3, and the vertical rod portion 22 is arc-shaped for subsequent folding use, and the lower end of the vertical rod portion 22 is provided with a sprocket 23, the sprocket 23 is connected with a set of foot pedals 24, and a flywheel 25 is provided at the end away from the vertical rod portion 22, and a chain 26 is sleeved on the sprocket 23 and the flywheel 25, so that the sprocket 23 and the flywheel 25 form a flexible transmission, and the flywheel 25 is connected to the rear wheel 27, and through the flexible transmission, the rear wheel 27 can be driven to rotate and in turn drive the folding bicycle to displace, and a fixing rod 28 is provided on the rear frame 2.

[0039] It is to be noted that Figures 1 to 7 for the convenience of description, the plate member 21 is formed in a basket shape, and the actual structure is as shown in Figure 8 , a plurality of supporting ribs are provided on the plate member 21, so as to achieve lightweight structure; in addition, a speed changer can be installed on the sprocket 23 and the flywheel 25, and the structure of the speed changer is not the focus of the improvement of the present application, which will not be described here.

[0040] As Figures 1 to 3 shown, the wheel width of the wheel frame of the front wheel 14 and the rear wheel 27 is formed in a triangular shape by three plate members, so compared with the structure of the wheel frame of the prior art which is formed by radial steel bars, the folding bicycle of the present application has the advantages of attracting the attention of consumers and maintaining the balance of the folding bicycle.

[0041] As Figures 4 to 6 shown, the rotating pivot 3 has a bearing inside, which provides the front frame 1 and the rear frame 2 with the rotating pivot 3 as the center to rotate, and in addition, the rotating pivot 3 further has a fixing buckle (not shown in the figure) to fix the rotating angle and prevent loosening.

[0042] As Figure 1 , Figure 2 shown, the positioning assembly 4 is connected to the pivoting portion 161 of the sheet metal member 16, and the positioning assembly 4 is mainly composed of two parallel connecting plates 41, a shock absorber 42 and a buckle portion 43, as shown in Figures 4 to 6 , the connecting plate 41 is connected to the pivoting portion 161, the shock absorber 42 can reduce the buffer force generated when the road surface is uneven, and the buckle portion 43 uses a switch 431 to make the buckle portion 43 have the functions of loosening and buckling, and the buckle portion 43 can be buckled or separated from the fixing rod 28, so that the front frame 1 and the rear frame 2 can achieve the functions of folding together or unfolding.

[0043] The above is the structure introduction of the present application, and then the use mode and the advantages obtained by the present application will be introduced:

[0044] 1. As shown in Figure 1 , Figure 2 to use, the front frame 1 and the rear frame 2 are unfolded, and the buckle part 43 of the positioning assembly 4 is buckled on the fixed rod 28 of the rear frame 2, so that the effect of stable unfolding is achieved;

[0045] 2. As shown in Figures 4 to 6 , when the folding bicycle is to be stored, the press switch 431 is pressed to release the buckle part 43, so that the fixed rod 28 is unlocked, and then the front frame 1 and the rear frame 2 are rotated along the rotating pivot 3 to approach each other, so that the front frame 1 and the rear frame 2 can be stored compactly, and the structure as shown in Figure 7 is obtained. In addition, the handlebar 12 can also be removed through the quick release structure, so that the folding bicycle stored reduces the use amount of the storage space, and the operation is more intuitive;

[0046] 3. The positioning assembly 4 can be combined with the shock absorber 42 to adapt to various riding environments.

[0047] 4. The front frame 1 and the rear frame 2 are provided with support ribs in the frame body, which can reduce the weight of the bicycle body.

[0048] The embodiments of the utility model have been described in detail above. However, the utility model is not limited to the above-mentioned embodiments, and various changes can be made within the knowledge range possessed by ordinary skilled persons in the technical field without departing from the purpose of the utility model.

Claims

1. A folding structure of a folding bicycle, characterized by, A front frame, a rear frame, a rotating pivot and a positioning assembly are provided, wherein: The front frame comprises an upper rod part, a handle is arranged at the front end of the upper rod part, a front fork is arranged at the lower end of the handle, the front fork is pivotally connected with a front wheel, the upper rod part of the front frame is provided with a seat cushion at the side opposite to the front wheel, and the rotating pivot is arranged at the lower end of the upper rod part; The rear frame is composed of two symmetrical plate members, the rear frame comprises a vertical rod part, the vertical rod part is pivotally connected with the rotating pivot at the upper end, a sprocket is arranged at the lower end of the vertical rod part, a set of pedals are arranged around the sprocket, a flywheel is arranged at the end away from the vertical rod part, a chain is arranged around the sprocket and the flywheel, the sprocket and the flywheel are in flexible transmission, the flywheel is pivotally connected with a rear wheel, and a fixing rod is arranged on the rear frame; The rotating pivot is internally provided with a bearing, so that the front frame and the rear frame rotate around the rotating pivot as the center; The positioning assembly is arranged at a predetermined position of the upper rod part, the positioning assembly is provided with a clamping part, a switch is arranged to enable the clamping part to be released or clamped, and the clamping part can be clamped or separated from the fixing rod, so that the front frame and the rear frame can be folded together or unfolded.

2. The folding structure of the folding bicycle according to claim 1, wherein, The upper rod part is composed of a rectangular frame, and a plurality of supporting ribs are arranged inside the upper rod part.

3. The folding structure of the folding bicycle according to claim 1, wherein, The front fork is a frame structure, and a plurality of supporting ribs are arranged inside the front fork.

4. The folding structure of the folding bicycle according to claim 1, wherein, A plurality of supporting ribs are arranged inside the plate member.

5. The folding structure of the folding bicycle according to claim 1, wherein The wheel width of the wheel frame of the front wheel and the rear wheel is in a triangular shape formed by three plate members.

6. The folding structure of the folding bicycle according to claim 1, wherein A seat tube is arranged below the seat cushion, the seat tube is arranged on a plate member in the shape of M, the plate member is connected with the upper rod part through a pivot connection part, and one end of the positioning assembly is coaxially connected with the pivot connection part of the plate member.

7. The folding structure of the folding bicycle according to claim 1, wherein The positioning assembly sequentially comprises two sets of parallel connection plates from top to bottom, a shock absorber is connected at the lower end of the connection plates, and the clamping part is connected at the lower end of the shock absorber.

8. The folding structure of the folding bicycle according to claim 1, wherein The vertical rod part is in an arc shape.

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