Bicycle frame folding structure

Abstract

The utility model discloses a bicycle frame folding structure which is applied to the technical field of bicycle frame folding structures and is characterized by comprising a supporting frame, a front frame is fixedly connected to the front end of the supporting frame, a rear frame is hinged to the bottom of the rear end of the supporting frame, and a seat frame is hinged to the top of the supporting frame. The rear frame is locked and fixedly connected between the support frame and the seat frame based on a locking assembly; the safety protection device has the technical effects of simple structure and good safety.

Description

TECHNICAL FIELD

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

[0002] The folding bicycle is welcomed by the majority of consumers with its convenient carrying and storage characteristics, the structure of the existing folding bicycle frame on the market is complex, and unfolding and folding operations are tedious, and the existing folding bicycle structure on the market is fixed by locking structure in the unfolded state, but under the conditions of high frequency vibration or long-term use, the locking structure makes the folding frame separate from the locking and thus affects the safety of the frame, which has the necessity of improvement SUMMARY

[0003] The utility model aims at providing a bicycle frame folding structure, which has the advantages of simple structure and good safety.

[0004] The above technical purpose of the utility model is realized by the following technical scheme: a bicycle frame folding structure, comprising a support frame, the front end of the support frame is fixedly connected with a front frame, the bottom of the rear end of the support frame is hingedly connected with a rear frame, the top of the support frame is hingedly connected with a seat frame, and the rear frame is locked and fixedly connected between the support frame and the seat frame based on a locking assembly.

[0005] The utility model is further provided as follows: the locking assembly comprises a locking rod fixedly connected to the rear frame, first and second locking grooves for accommodating the locking rod are respectively formed in the support frame and the seat frame, a locking block is fixedly connected to the seat frame, a clamping block for clamping the locking block is slidably connected to the support frame based on an elastic clamping assembly, and a clamping groove matched with the clamping block is formed in the locking block.

[0006] The utility model is further provided as follows: the elastic clamping assembly comprises an extension and retraction groove formed in the support frame and used for extension or retraction of the clamping block, and a guide block fixedly connected to the clamping block, a guide groove matched with the guide block is formed in the support frame, and a clamping spring is arranged between the clamping block and the clamping groove.

[0007] The utility model is further provided as follows: a first inclined guide surface obliquely formed in the clamping block, a second inclined guide surface matched with the first inclined guide surface is formed in the locking block, when the seat frame is unfolded, the second inclined guide surface pushes the first inclined guide surface, thereby pushing the clamping block to retract into the extension and retraction groove until the seat frame is in place, the clamping spring drives the clamping block to reset and clamps into the clamping groove to complete automatic locking.

[0008] The utility model further sets up: still be equipped with the unlocking assembly for unlocking the locking assembly to realize the unlocking of bicycle frame folding of the support frame, the unlocking assembly includes the unlocking lever of rotation connection in the support frame and the unlocking slot of setting in the clamping block, the unlocking lever end fixedly connected with the unlocking block of inserting in the unlocking slot, the support frame is equipped with the slot of rotating of the unlocking lever.

[0009] The utility model further sets up: the seat frame and the support frame are set back to lean.

[0010] The utility model further sets up: the front frame and the rear frame are triangular structure.

[0011] The utility model further sets up: the front frame, the rear frame, the support frame and the seat frame are made of aluminium alloy or stainless steel material.

[0012] Summarized above, the utility model has following beneficial effect:

[0013] 1. through the locking of the rear frame based on locking assembly fixed between the support frame and the seat frame, when bicycle frame is in the unfolded state, through locking assembly realizes the locking of the rear frame fixed in the support frame, and through the pressure of the rider on the seat frame to further lock the rear frame and the seat frame, to avoid the influence of safety in the unfolded state when the rear frame separates from locking, and the seat frame and the support frame are set back to lean, which is convenient for riding, and the component force of the pressure on the seat frame is back, so as to prevent the seat frame from separating from the support frame, further ensure the stability of locking and the safety of structure.

[0014] 2. setting locking assembly includes the locking rod of fixed connection on the rear frame and the first locking slot and the second locking slot of setting on the support frame and the seat frame respectively, and setting locking block on the seat frame, and the clamping block of locking block is slidingly connected in the support frame based on elastic clamping assembly, when unfolding bicycle frame, first rotate the rear frame to make the locking rod enter the first locking slot, then rotate the seat frame to make the second locking slot lock the locking rod, in the process of unfolding the seat frame, the second inclined guide surface based on setting on the locking block pushes the first inclined guide surface to push the clamping block into the telescopic slot until the seat frame is in place, the clamping spring drives the clamping block to reset and clamps into the clamping slot to complete automatic locking, when folding, the unlocking lever is pushed back into the telescopic slot by the unlocking lever to make the clamping block separate from the clamping slot, so that the unlocking of the seat frame can be completed, then the seat frame and the rear frame are folded to the position of the front frame, the structure is simple, and the unfolding and folding operation is convenient. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1is a structural schematic view of the folding state of the embodiment;

[0016] Figure 2 is a structural schematic view of the folding state of the embodiment;

[0017] Figure 3 is a structural schematic view of the locking assembly of the embodiment;

[0018] Figure 4 is an exploded structural schematic view of the locking assembly of the embodiment;

[0019] Figure 5 is a structural sectional view of the support frame of the embodiment;

[0020] Figure 6 is a structural schematic view of the elastic clamping assembly of the embodiment;

[0021] Figure 7 is a structural schematic view of the unlocking assembly of the embodiment.

[0022] Reference signs: 1, support frame; 2, front frame; 3, rear frame; 4, locking assembly; 41, locking rod; 42, first locking groove; 43, second locking groove; 44, locking block; 45, elastic clamping assembly; 451, telescopic groove; 452, guide block; 453, guide groove; 454, clamping spring; 46, clamping block; 47, clamping groove; 48, first inclined guide surface; 49, second inclined guide surface; 5, seat frame; 6, unlocking assembly; 61, unlocking lever; 62, unlocking groove; 63, unlocking block; 64, lever groove. DETAILED DESCRIPTION

[0023] The utility model will be further explained in detail in combination with the drawings.

[0024] Embodiment:

[0025] Reference Figures 1 to 7 A bicycle frame folding structure, including support frame 1, front frame 2 is fixedly connected to the front end of support frame 1, rear frame 3 is hingedly connected to the bottom of rear end of support frame 1, seat frame 5 is hingedly connected to the top of support frame 1, rear frame 3 is locked and fixedly connected between support frame 1 and seat frame 5 based on locking assembly 4, locking assembly 4 is used to lock and fix rear frame 3 on support frame 1, and the pressure exerted on seat frame 5 by the rider is used to further lock rear frame 3 and seat frame 5, so that the safety is not affected when the rear frame 3 is unlocked in the unfolded state. In the embodiment, the front frame 2 and the rear frame 3 are triangular in structure, so that the structure stability of the front frame 2 and the rear frame 3 increases the safety of the structure to some extent, and the front frame 2, the rear frame 3, the support frame 1 and the seat frame 5 are made of aluminum alloy or stainless steel, so as to ensure the structural strength of the bicycle frame.

[0026] Reference Figures 3 to 7 Specifically, the locking assembly 4 includes a locking rod 41 fixedly connected to the rear frame 3, and first and second locking grooves 42 and 43 are respectively formed in the support frame 1 and the seat frame 5 for accommodating the locking rod 41, the first and second locking grooves 42 and 43 are combined and contain the locking rod 41 when the seat frame 5 is unfolded, thereby achieving positioning and fixing of the locking rod 41, a locking block 44 is fixedly connected to the seat frame 5, a clamping block 46 for clamping the locking block 44 is slidingly connected to the support frame 1 based on an elastic clamping assembly 45, a clamping groove 47 matched with the clamping block 46 is formed in the locking block 44, and the seat frame 5 can be locked on the support frame 1 by clamping the clamping block 46 into the clamping groove 47. The elastic clamping assembly 45 includes an extension and retraction groove 451 formed in the support frame 1 for extension or retraction of the clamping block 46, and a guide block 452 fixedly connected to the clamping block 46, a guide groove 453 matched with the guide block 452 is formed in the support frame 1, and a clamping spring 454 is arranged between the clamping block 46 and the clamping groove 47, so that the clamping block 46 is clamped in the clamping groove 47 by the elastic force of the clamping spring 454.

[0027] Reference Figure 4 Specifically, a first inclined guide surface 48 is formed on the clamping block 46, a second inclined guide surface 49 matched with the first inclined guide surface 48 is formed on the locking block 44, when the seat frame 5 is unfolded, the second inclined guide surface 49 pushes the first inclined guide surface 48 to push the clamping block 46 into the extension and retraction groove 451 until the seat frame 5 is in place, and the clamping spring 454 drives the clamping block 46 to reset and clamp into the clamping groove 47 to complete automatic locking.

[0028] Reference Figures 4 to 7 Specifically, the support frame 1 is further provided with an unlocking assembly 6 for unlocking the locking assembly 4 to achieve folding of the bicycle frame, the unlocking assembly 6 includes an unlocking lever 61 rotatably connected to the support frame 1 and an unlocking groove 62 formed in the clamping block 46, the unlocking lever 61 has an unlocking block 63 inserted into the unlocking groove 62 at the end, and a rotating groove 64 is formed in the support frame 1 for rotation of the unlocking lever 61, when folding is needed, the unlocking lever 61 is rotated to drive the unlocking block 63 to push the clamping block 46 to retract into the extension and retraction groove 451, so that the clamping block 46 is separated from the clamping groove 47 to complete unlocking of the seat frame 5, and then the seat frame 5 and the rear frame 3 are folded to the position of the front frame 2. In this embodiment, the seat frame 5 and the support frame 1 are inclined backward, and the component force of the pressure acting on the seat frame 5 is backward, thereby preventing the seat frame 5 from separating from the support frame 1, and further ensuring the stability of the locking and the safety of the structure.

[0029] Brief description of use: when unfolding the bicycle frame, firstly rotate the rear frame 3 to make the locking rod 41 enter the first locking slot 42, then rotate the seat frame 5 to make the second locking slot 43 lock the locking rod 41, during unfolding the seat frame 5, based on the second inclined guide surface 49 opened on the locking block 44 push the first inclined guide surface 48 to push the clamping block 46 to retract into the telescopic slot 451 until the seat frame 5 is in place, the clamping spring 454 drives the clamping block 46 to reset and clamps into the clamping slot 47 to complete the automatic locking, when folding, by pulling the unlocking pull rod 61 to drive the unlocking block 63 to push the clamping block 46 to retract into the telescopic slot 451, so that the clamping block 46 is separated from the clamping slot 47 to complete the unlocking of the seat frame 5, then fold the seat frame 5 and the rear frame 3 to the position of the front frame 2.

[0030] The embodiment is only an explanation of the utility model, and is not a limitation of the utility model, and a person skilled in the art can make a modification with creative contribution according to the need after reading the specification, but as long as it is within the scope of the claims of the utility model, it is protected by the patent law.

Claims

1. A folding structure of a bicycle frame comprising a support frame (1); characterized in that, The support frame (1) is fixedly connected with a front frame (2) at the front end, hingedly connected with a rear frame (3) at the bottom of the rear end, and hingedly connected with a seat frame (5) at the top.

2. A folding bicycle frame structure as claimed in claim 1, wherein, The locking assembly (4) comprises a locking rod (41) fixedly connected to the rear frame (3), a first locking groove (42) and a second locking groove (43) respectively formed in the support frame (1) and the seat frame (5) for accommodating the locking rod (41), a locking block (44) fixedly connected to the seat frame (5), and a clamping block (46) slidably connected to the support frame (1) by an elastic clamping assembly (45) for clamping the locking block (44), and a clamping groove (47) formed in the locking block (44) and matched with the clamping block (46).

3. A folding bicycle frame structure as claimed in claim 2, wherein, The elastic clamping assembly (45) comprises a telescopic groove (451) formed in the support frame (1) for the clamping block (46) to extend or retract, and a guide block (452) fixedly connected to the clamping block (46), and a guide groove (453) formed in the support frame (1) and matched with the guide block (452), and a clamping spring (454) arranged between the clamping block (46) and the clamping groove (47).

4. A folding bicycle frame structure as claimed in claim 3, wherein, The clamping block (46) is provided with a first inclined guide surface (48) formed obliquely, and the locking block (44) is provided with a second inclined guide surface (49) matched with the first inclined guide surface (48), when the seat frame (5) is unfolded, the second inclined guide surface (49) pushes the first inclined guide surface (48) to push the clamping block (46) to retract into the telescopic groove (451) until the seat frame (5) is in place, and the clamping spring (454) drives the clamping block (46) to reset and clamps into the clamping groove (47) to complete automatic locking.

5. A folding bicycle frame structure as claimed in claim 3, wherein, The support frame (1) is further provided with an unlocking assembly (6) for unlocking the locking assembly (4) to realize folding of the bicycle frame, the unlocking assembly (6) comprises an unlocking lever (61) rotatably connected in the support frame (1) and an unlocking groove (62) formed in the clamping block (46), and the unlocking lever (61) is fixedly connected at the end with an unlocking block (63) inserted into the unlocking groove (62), and the support frame (1) is provided with a rotating groove (64) for the unlocking lever (61) to rotate.

6. A folding bicycle frame structure according to any one of claims 2 to 5, wherein, The seat frame (5) and the support frame (1) are inclined rearward.

7. The folding bicycle frame structure of claim 1, wherein, The front frame (2) and the rear frame (3) are triangular in structure.

8. The folding bicycle frame structure of claim 1, wherein, The front frame (2), the rear frame (3), the support frame (1) and the seat frame (5) are made of aluminum alloy or stainless steel.

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