Frame structure of folding bicycle

Abstract

The utility model discloses a frame structure of a folding bicycle, which is characterized in that the frame structure comprises a front support and a rear support, a bottom frame and two side frames are arranged between the front support and the rear support, each side frame comprises three groups of X-shaped folding supports, two adjacent folding supports are rotatably connected, the folding supports on two sides are respectively rotatably connected with the front support and the rear support, and the front support and the rear support are connected with the bottom frame. The underframe comprises a middle connecting rod, a front underframe and a rear underframe, the front underframe and the rear underframe are rotationally connected with the front support and the rear support respectively, the other end of the front support is rotationally connected with a front supporting rod which is rotationally connected to the middle connecting rod, and the other end of the rear support is rotationally connected with a rear supporting rod which is rotationally connected to the middle connecting rod. A supporting rod is arranged between the middle connecting rod and the folding support located in the middle. The folding bicycle has the advantages that the folded bicycle body is smaller in size, small in occupied space and convenient to store and carry.

Description

TECHNICAL FIELD

[0001] The utility model relates to a folding bicycle, especially a folding bicycle frame structure. BACKGROUND

[0002] In order to facilitate the self-driving tour, outdoor camping and other activities, now all with the hand-pulled folding bicycle, after reaching the destination, the various articles required by the self-driving tour and outdoor camping are placed on the carrier and towed, which can greatly reduce the trouble of consumers carrying bags in their hands.

[0003] Such as the publication number for CN220996447U a kind of folding cart, with unfolded state and folding state, including handle assembly, rear support frame assembly, front support frame assembly, the bottom frame component of connecting rear support frame assembly and front support frame assembly, side cross pipe assembly, rear wheel assembly and front wheel assembly are set in the lower end of bottom frame component.

[0004] The structure of the above-mentioned folding bicycle, the bottom frame component is divided into left and right halves, after the folding of the frame, the left and right halves of the bottom frame component are folded with each other, so that the volume of the folded vehicle body is still relatively large, and the folded vehicle body occupies a large space, which is not convenient for storage and carrying. UTILITY MODEL CONTENTS

[0005] The utility model solves the technical problem to provide a folding bicycle frame structure with smaller volume after folding.

[0006] The utility model solves the technical problem and adopts the technical scheme that the folding bicycle frame structure includes front support and rear support, bottom frame and two side frames are arranged between the front support and the rear support, the side frame includes three groups of folding supports in "X" shape, two adjacent folding supports are rotationally connected, the folding supports on both sides are rotationally connected with the front support and the rear support respectively, the bottom frame includes middle connecting rod, front bottom frame and rear bottom frame, the front bottom frame and the rear bottom frame are rotationally connected with the front support and the rear support respectively, the other end of the front bottom frame is rotationally connected with front support rod, the front support rod is rotationally connected on the middle connecting rod, the other end of the rear bottom frame is rotationally connected with rear support rod, the rear support rod is rotationally connected on the middle connecting rod, and the middle connecting rod is provided with support rod between the folding support in the middle.

[0007] Further preferred scheme of the utility model is that connecting rods are arranged between the folding supports on both sides and the front support and the rear support, one end of the connecting rod is rotationally connected with the front support / rear support, and the other end of the connecting rod is rotationally connected with one end of the folding support.

[0008] Further preferred scheme of the utility model is that the folding support includes two straight rods arranged in cross, and the intersection of the two straight rods is the rotation axis.

[0009] A further preferred embodiment of this utility model is: a bottom crossbar is provided between the two side frames, and when the frame is in the open state, the bottom frame abuts against the bottom crossbar.

[0010] A further preferred embodiment of this utility model is that the two ends of the bottom crossbar are respectively connected to the connection point between the two folding brackets.

[0011] A further preferred embodiment of this utility model is: two front wheels are detachably connected to the front bracket, and two rear wheels are detachably connected to the rear bracket.

[0012] A further preferred embodiment of this utility model is as follows: a connecting sleeve is provided at the bottom of the front bracket, an insert rod is provided on the front wheel, a retaining sleeve is provided at the top of the connecting sleeve, and a retaining spring is provided on the retaining sleeve. After the insert rod is inserted into the retaining sleeve from the bottom of the connecting sleeve, the retaining spring is locked at the top of the insert rod.

[0013] A further preferred embodiment of this utility model is as follows: a clamping sleeve is provided on the rear bracket, and a clamping rod is provided on the rear wheel. After the clamping rod is inserted from the bottom of the clamping sleeve, the top end of the clamping rod is tightly pressed against the top end of the clamping sleeve.

[0014] Compared with the prior art, the advantages of this utility model are that the base frame includes a middle connecting rod, a front base frame and a rear base frame. The front base frame and the rear base frame are rotatably connected to the front support and the rear support respectively. The other end of the front support is rotatably connected to a front support rod, which is rotatably connected to the middle connecting rod. The other end of the rear support is rotatably connected to a rear support rod, which is rotatably connected to the middle connecting rod. After folding, the vehicle body is smaller in size, does not take up space, and is easy to store and carry. Attached Figure Description

[0015] The present invention will be further described in detail below with reference to the accompanying drawings and preferred embodiments. However, those skilled in the art will understand that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be construed as limiting the scope of the present invention. Furthermore, unless specifically indicated, the drawings are only schematic representations of the composition or structure of the described objects and may contain exaggerated depictions, and the drawings are not necessarily drawn to scale.

[0016] Figure 1 This is a schematic diagram of the overall structure of a folding bike;

[0017] Figure 2 This is a schematic diagram of a folding bicycle frame;

[0018] Figure 3 for Figure 2 A partial exploded view;

[0019] Figure 4This is a diagram showing the folding bike after it has been folded.

[0020] Figure 5 This is a diagram showing the packaged state of a folding bike.

[0021] In the diagram: 1. Front bracket; 11. Connecting sleeve; 12. Clip sleeve; 2. Rear bracket; 21. Pressing sleeve; 3. Base frame; 31. Intermediate connecting rod; 32. Front base frame; 33. Rear base frame; 34. Front support rod; 35. Rear support rod; 36. Support rod; 37. Bottom crossbar; 4. Side frame; 41. Folding bracket; 42. Straight rod; 43. Connecting rod; 5. Telescopic handle; 6. Front wheel; 61. Insert rod; 7. Rear wheel; 71. Pressing rod; 8. Fabric surface. Detailed Implementation

[0022] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Those skilled in the art will appreciate that these descriptions are merely descriptive and exemplary and should not be construed as limiting the scope of protection of the present invention.

[0023] It should be noted that similar labels in the following figures indicate similar items; therefore, once an item is defined in one figure, it may not be further defined and explained in subsequent figures.

[0024] The frame structure of the folding bike includes a front support 1 and a rear support 2. A base frame 3 and two side frames 4 are provided between the front support 1 and the rear support 2. A telescopic handle 5 is provided on the front support 1 to facilitate the user to pull or push the folding bike. The telescopic handle 5 is detachable for easy storage.

[0025] A front wheel 6 is mounted on the front bracket 1 and is detachably connected to the front bracket 1. Furthermore, a connecting sleeve 11 is mounted at the bottom of the front bracket 1, and a rod 61 is mounted on the front wheel 6. A retaining sleeve 12 is mounted at the top of the connecting sleeve 11, and a retaining spring is mounted on the retaining sleeve 12. After the rod 61 is inserted from the bottom of the connecting sleeve 11 into the retaining sleeve 12, the retaining spring is engaged at the top of the rod 61. When the front wheel 6 needs to be removed, the retaining spring is removed, and the rod 61 can be taken out of the connecting sleeve 11, thus removing the front wheel 6.

[0026] The rear bracket 2 is equipped with a rear wheel 7, which is detachably connected to the rear bracket 2. Furthermore, the rear bracket 2 is equipped with a clamping sleeve 21, and the rear wheel 7 is equipped with a clamping rod 71. After the clamping rod 71 is inserted from the bottom of the clamping sleeve 21, the top of the clamping rod 71 is tightly pressed against the top of the clamping sleeve 21. When the rear wheel 7 needs to be removed, the clamping rod 71 can be pulled out from the clamping sleeve 21.

[0027] The side frame 4 includes three sets of "X"-shaped folding brackets 41, with adjacent folding brackets 41 rotatably connected. Furthermore, each folding bracket 41 includes two intersecting straight rods 42, with the intersection of the two straight rods 42 serving as the axis of rotation.

[0028] The folding brackets 41 located on both sides are rotatably connected to the front bracket 1 and the rear bracket 2 respectively. A connecting rod 43 is provided between the folding brackets 41 on both sides and the front bracket 1 and the rear bracket 2. One end of the connecting rod 43 is rotatably connected to the front bracket 1 or the rear bracket 2, and the other end of the connecting rod 43 is rotatably connected to one of the straight rods 42 of the folding bracket 41.

[0029] When the vehicle body is folded, the connecting rod 43 and the straight rod 42 rotate relative to each other, reducing the length of the connecting rod 43 and making the vehicle body smaller after folding.

[0030] The base frame 3 includes a middle connecting rod 31, a front base frame 32, and a rear base frame 33. The front base frame 32 and the rear base frame 33 are rotatably connected to the front support 1 and the rear support 2, respectively. The other end of the front base frame 32 is rotatably connected to a front support rod 34, which is rotatably connected to the middle connecting rod 31. The other end of the rear base frame 33 is rotatably connected to a rear support rod 35, which is rotatably connected to the middle connecting rod 31. A support rod 36 is provided between the middle connecting rod 31 and the folding bracket 41 located in the middle. The support rod 36 is connected at the intersection of the folding bracket 41.

[0031] A bottom crossbar 37 is provided between the two side frames 4. There are two bottom crossbars 37. The two ends of the bottom crossbar 37 are respectively connected to the connection point between the two folding brackets 41. One bottom crossbar 37 is connected to the connection point between the middle folding bracket 41 and the front folding bracket 41, and the other bottom crossbar 37 is connected to the connection point between the center folding bracket 41 and the rear folding bracket 41.

[0032] When the frame is in the open position, the base frame 3 rests against the bottom crossbar 37, giving the base frame 3 better support performance and better load-bearing capacity.

[0033] The frame is also covered with a fabric panel 8.

[0034] like Figure 1 and 2 As shown, the frame is in the open position, as... Figure 3 As shown, the frame is in a folded state. When the frame is in a folded state, the front base frame 32 and the front support rod 34 rotate relative to each other to fold together, and the rear base frame 33 and the rear support rod 35 rotate relative to each other to fold together. This makes the overall size of the frame smaller after folding.

[0035] like Figure 5As shown, the frame is in a packaged state. The front wheel 6 and the rear wheel 7 are removed from the vehicle body and placed into the gaps in the vehicle body. The telescopic handle 5 is disassembled and stacked on the vehicle body, so that the vehicle body has a smaller packaging volume, effectively reducing packaging and transportation costs.

[0036] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0037] The frame structure of the folding bicycle provided by this utility model has been described in detail above. Specific examples have been used to illustrate the principle and implementation of this utility model. The descriptions of the embodiments above are only for the purpose of helping to understand this utility model and its core ideas. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principle of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. The frame structure of a folding bicycle, characterized in that: The device includes a front support and a rear support. A base frame and two side frames are provided between the front and rear supports. The side frames include three sets of "X"-shaped folding brackets. Adjacent folding brackets are rotatably connected. The folding brackets on both sides are rotatably connected to the front and rear supports, respectively. The base frame includes a middle connecting rod, a front base frame, and a rear base frame. The front and rear base frames are rotatably connected to the front and rear supports, respectively. A front support rod is rotatably connected to the other end of the front base frame. The front support rod is rotatably connected to the middle connecting rod. A support rod is provided between the middle connecting rod and the folding bracket located in the middle.

2. The frame structure of the folding bicycle according to claim 1, characterized in that: Connecting rods are provided between the folding brackets on both sides and the front and rear brackets. One end of the connecting rod is rotatably connected to the front / rear bracket, and the other end of the connecting rod is rotatably connected to one end of the folding bracket.

3. The frame structure of the folding bicycle according to claim 1, characterized in that: The folding bracket includes two straight rods that intersect each other, and the intersection of the two straight rods is the axis of rotation.

4. The frame structure of the folding bicycle according to claim 1, characterized in that: A bottom crossbar is provided between the two side frames, and the bottom frame rests against the bottom crossbar when the frame is in the open state.

5. The frame structure of the folding bicycle according to claim 4, characterized in that: The two ends of the bottom crossbar are respectively connected to the connection point between the two folding brackets.

6. The frame structure of the folding bicycle according to claim 1, characterized in that: The front bracket has two detachable front wheels, and the rear bracket has two detachable rear wheels.

7. The frame structure of the folding bicycle according to claim 6, characterized in that: The bottom of the front bracket is provided with a connecting sleeve, the front wheel is provided with a plug rod, the top of the connecting sleeve is provided with a retaining sleeve, and the retaining sleeve is provided with a retaining spring. After the plug rod is inserted into the retaining sleeve from the bottom of the connecting sleeve, the retaining spring is locked into the top of the plug rod.

8. The frame structure of the folding bicycle according to claim 6, characterized in that: A clamping sleeve is provided on the rear bracket, and a clamping rod is provided on the rear wheel. After the clamping rod is inserted from the bottom of the clamping sleeve, the top of the clamping rod is tightly pressed against the top of the clamping sleeve.

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