Detachable bicycle folding device

Abstract

The present invention relates to the field of bicycle technology, and discloses a detachable bicycle folding device, comprising a rear tube seat and a front tube seat embedded in one side of the rear tube seat, wherein the front side of the locking block base is rotatably connected to a locking block assembly, and the front end of the rear tube seat is rotatably connected to a handle assembly; the handle assembly includes a handle, one end of which is rotatably connected to a first cylindrical long pin. The present invention enables rapid assembly and disassembly of a bicycle through the rear tube seat, the locking block assembly, and the handle assembly, thereby enabling the bicycle to be separated into two parts, making it easier to load the bicycle into a vehicle, or to store the two parts separately to improve space utilization. After the bicycle is assembled, the front tube of the frame is pulled by a connecting rod and a second cylindrical long pin, so that the second cylindrical long pin is subjected to force in a limiting groove in the rear tube seat, and the angle between the connecting rod and the handle is small, so that the force generated by vibration during the movement of the bicycle is also small on the handle, thereby ensuring the safety of the bicycle.

Description

Technical Field

[0001] The invention relates to the technical field of bicycles, in particular to a detachable bicycle folding device. Background Art

[0002] Compared to regular bicycles, folding bicycles offer advantages such as portability, ease of storage, and increased flexibility. Therefore, they are a space-saving option for residents with smaller homes. For those who drive or travel by car, they can fit their bikes into their cars. Over the past few years, folding bicycles have become increasingly popular. The key to their foldability lies in the folding mechanism. Currently, most folding bicycles on the market use hinged folding mechanisms, which prevent the front and back halves from being completely separated. This makes them less adaptable to various environments, such as small car trunks, crowded rooms, or warehouses.

[0003] A Chinese patent discloses a new type of split bicycle folding device (authorization announcement number CN218085875U). This patented technology allows users to easily disassemble a folding bicycle into two parts for folding and storage. When consumers are driving, even if the space in the car is relatively tight, they can also separate the bicycle into two parts so that both can be loaded into the car. Or when stored in indoor spaces such as homes, warehouses or offices, they can also be stored separately to improve space utilization. At the same time, the disassembly and assembly process does not require any external tools, and the installation and disassembly are simple and convenient. The provision of a limit and locking structure makes the device more complete in function and safer in performance. However, its connecting part is directly subjected to force, and the bicycle is subjected to greater force during riding, which makes it easy to separate, resulting in low safety. Summary of the Invention

[0004] The object of the present invention is to provide a detachable bicycle folding device to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] The folding device of the detachable bicycle comprises a rear tube seat and a front tube seat embedded in one side of the rear tube seat, one end of the front tube seat is fixedly connected to the front tube of the frame by welding, and the front end of the outer side of the front tube of the frame is welded with a locking block base, the front side of the locking block base is rotatably connected to the locking block assembly, and the front end of the rear tube seat is rotatably connected to the handle assembly; the handle assembly includes a handle, one end of the handle is rotatably connected to a first cylindrical long pin, and a positioning slot is provided on the upper side of the other end of the handle, the front end of the handle is meshed and connected with a third machine screw and a second machine screw in sequence from left to right, and a group of waist-shaped holes are provided on one side of the upper and lower ends of the handle near the positioning slot, and a cylindrical short pin is embedded in the waist-shaped hole, one end of the outer side of the cylindrical short pin is provided with a connecting rod, and a torsion spring is sleeved on the lower end of the connecting rod on the outer side of the cylindrical short pin, and one end of the connecting rod is welded with a second cylindrical long pin.

[0007] As a further solution of the present invention: corresponding threaded holes are opened on the inner sides of the cylindrical short pin and the connecting rod, and round head screws are engaged and connected in the two threaded holes, and an M8 machine screw is engaged and connected at one end of the handle near the round head screw.

[0008] As a further solution of the present invention: the locking block assembly includes a locking block, the lower end of the locking block is fixedly connected to a positioning head, and a through rotation hole is opened at the front end of the locking block, the rear end of the locking block is provided with a tower-shaped spring, and a round-head hexagon socket screw is embedded in the inner side of the rotation hole.

[0009] As a further solution of the present invention: the tower-shaped spring and the locking block are both sleeved on the locking block base, the round-head hexagon socket screw is engaged with the front end of the locking block base, and the positioning head corresponds to the positioning groove.

[0010] As a further solution of the present invention: the rear tube seat includes a rear tube seat body, a group of limit grooves and clamping grooves are respectively opened on one side of the rear tube seat body, and a first machine screw is engaged and connected at the lower end of the other side of the rear tube seat body, an open groove is opened in the middle of the front side of the rear tube seat body, and axial holes are opened at the upper and lower ends of the open groove.

[0011] As a further solution of the present invention: one end of the handle is located on the inner side of the open groove, the first cylindrical long pin is embedded in the inner side of the shaft hole from bottom to top, and the first cylindrical long pin and the rear tube seat body are fixedly connected by a first machine screw.

[0012] As a further solution of the present invention: the front tube seat is embedded in the inner side of the clamping groove, and a group of the limiting grooves corresponds to the position of the second cylindrical long pin.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] The present invention can realize rapid assembly and disassembly of the bicycle through the rear tube seat, the locking block assembly and the handle assembly. Therefore, the bicycle can be divided into two parts, which is convenient for loading the bicycle into the vehicle, and can also be stored separately to improve space utilization. After the bicycle is installed, the front tube of the frame is pulled by the connecting rod and the second cylindrical long pin, so that the second cylindrical long pin is subjected to force in the limiting groove in the rear tube seat. The angle between the connecting rod and the handle is small, so the force generated by vibration during the movement of the bicycle acts on the handle less, thereby ensuring the safety of the bicycle. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of a detachable bicycle folding device;

[0016] Figure 2 It is a schematic diagram of the structure of the front tube seat and the front tube of the frame in a detachable bicycle folding device;

[0017] Figure 3 It is a front structural schematic diagram of the handle assembly of the detachable bicycle folding device;

[0018] Figure 4 It is a rear view structural diagram of the handle assembly of the detachable bicycle folding device;

[0019] Figure 5 This is a schematic diagram of the exploded structure of the handle assembly of a detachable bicycle folding device;

[0020] Figure 6 This is a schematic diagram of the exploded structure of the locking block assembly in a detachable bicycle folding device;

[0021] Figure 7 This is a schematic diagram of the structure of the rear tube seat in a detachable bicycle folding device.

[0022] In the figure: 1. Rear tube seat; 11. Rear tube seat body; 12. Limiting groove; 13. Clamping slot; 14. Opening slot; 15. Axle hole; 16. First machine screw; 2. Front tube seat; 3. Front tube of frame; 4. Locking block base; 5. Locking block assembly; 51. Locking block; 52. Tower spring; 53. Round head hexagon socket screw; 54. Rotating hole; 55. Positioning head; 6. Handle assembly; 61. Handle; 62. Cylindrical short pin; 63. Positioning groove; 64. Second machine screw; 65. First cylindrical long pin; 66. Third machine screw; 67. Second cylindrical long pin; 68. Connecting rod; 69. Torsion spring; 610. M8 machine screw; 611. Round head screw. DETAILED DESCRIPTION

[0023] See also Figures 1 to 7In an embodiment of the present invention, a detachable bicycle folding device includes a rear tube seat 1 and a front tube seat 2 embedded in one side of the rear tube seat 1. One end of the front tube seat 2 is fixedly connected to the frame front tube 3 by welding. The side of one end of the rear tube seat 1 away from the front tube seat 2 is welded to the frame rear tube. The frame rear tube and the frame front tube 3 are completely separated structures. A locking block base 4 is welded to the front end of the outer side of the frame front tube 3. The front side of the locking block base 4 is rotatably connected to the locking block assembly 5. The front end of the rear tube seat 1 is rotatably connected to the handle assembly 6.

[0024] exist Figure 3 、 Figure 4 and Figure 5 In the embodiment, the handle assembly 6 includes a handle 61, one end of the handle 61 is rotatably connected to a first cylindrical long pin 65, and a positioning groove 63 is provided on the upper side of the other end of the handle 61, and the front end of the handle 61 is engaged with a third machine screw 66 and a second machine screw 64 in sequence from left to right, and a group of waist-shaped holes are provided on one side of the upper and lower ends of the handle 61 near the positioning groove 63, and a cylindrical short pin 62 is embedded in the waist-shaped hole, and a connecting rod 68 is provided at one end of the outer side of the cylindrical short pin 62, and a connecting rod 68 is sleeved on the lower end of the connecting rod 68 on the outer side of the cylindrical short pin 62. Torsion spring 69, one end of connecting rod 68 is welded with second cylindrical long pin 67; under the action of torsion spring 69, and in the absence of other external forces, connecting rod 68 and handle 61 maintain a certain angle, when the handle 61 is squeezed in the direction of locking block assembly 5, connecting rod 68 is squeezed, and torsion spring 69 is deformed, which can make the angle between connecting rod 68 and handle 61 gradually smaller until it reaches 0°, and second cylindrical long pin 67 will enter into limiting groove 12, and corresponding threaded holes are provided on the inner sides of cylindrical short pin 62 and connecting rod 68, and two threaded holes are provided. The inner meshing connection is connected with a round head screw 611, which fixes the cylindrical short pin 62 and the connecting rod 68 together, and the angle of the connecting rod 68 and the handle 61 is controlled by the screw head of the round head screw 611. When the connecting rod 68 is opened to a certain angle under the action of the torsion spring 69, the screw head of the round head screw 611 will hit the handle 61 and will no longer open, so that the angle of the connecting rod 68 and the handle 61 is controlled within a reasonable range; one end of the handle 61 is meshed with an M8 machine screw 610 near the round head screw 611. Turn the third machine screw 66 so that the rear end of the third machine screw 66 is against the front tube seat 2. When the locking block 51 can firmly buckle the handle 61, rotate the M8 machine screw 610 again. The M8 machine screw 610 pushes the round head screw 611. The round head screw 611 pushes the cylindrical short pin 62 in the waist-shaped hole. When the second cylindrical long pin 67 can be close to the front tube seat 2, then rotate the second machine screw 64. The M8 machine screw 610 is squeezed by the second machine screw 64 and the M8 machine screw 610 is locked so that the M8 machine screw 610 does not slip.

[0025] exist Figure 2 、 Figure 3 and Figure 6 In the embodiment, the locking block assembly 5 includes a locking block 51, the lower end of the locking block 51 is fixedly connected to a positioning head 55, and a through rotation hole 54 is opened at the front end of the locking block 51, and a tower spring 52 is provided at the rear end of the locking block 51. A round head hexagon socket screw 53 is embedded in the inner side of the rotation hole 54. The tower spring 52 and the locking block 51 are both sleeved on the locking block base 4, and the round head hexagon socket screw 53 is engaged with the front end of the locking block base 4. The locking block 51 is limited by the round head hexagon socket screw 53 so that the locking block 51 will not be locked. The block base 4 falls off, but the locking block 51 can rotate around the locking block base 4; the positioning head 55 corresponds to the positioning groove 63, first press the handle 61 in the direction of the locking block assembly 5, and then press the locking block 51 from the right side and lower position of the locking block 51, so that the locking block 51 rotates clockwise around the locking block base 4, and the positioning head 55 can be pushed into the positioning groove 63. After releasing the hand, the torsion spring 69 and the tower spring 52 rebound respectively, and the handle 61 can be locked by the locking block assembly 5, and the locking block assembly 5 and the handle assembly 6 are no longer separated.

[0026] exist Figure 2 、 Figure 3 and Figure 7 The rear tube seat 1 includes a rear tube seat body 11, one side of the rear tube seat body 11 is respectively provided with a group of limiting grooves 12 and a card groove 13, and a first machine screw 16 is engaged and connected at the lower end of the other side of the rear tube seat body 11, an open groove 14 is provided in the middle of the front side of the rear tube seat body 11, and an axial hole 15 is provided at the upper and lower ends of the open groove 14. One end of the handle 61 is located on the inner side of the open groove 14, and the first cylindrical long pin 65 is embedded in the inner side of the axial hole 15 from bottom to top. The first cylindrical long pin 65 and the rear tube seat body 11 are fixedly connected by the first machine screw 16; the rear tube seat body 11 and the first cylindrical long pin 65 are fixed together by the first machine screw 16, so that the handle 61 can stably rotate around the first cylindrical long pin 65, and the front tube seat 2 is embedded in On the inner side of the slot 13, when the locking block 51 is squeezed from the left direction of the upper end of the locking block 51, the locking block 51 rotates counterclockwise, so that the positioning head 55 disengages from the positioning slot 63, and the front tube seat 2 can be removed from the rear tube seat 1; a group of limiting grooves 12 corresponds to the position of the second cylindrical long pin 67; when the handle 61 is fixed by the locking block assembly 5, the second cylindrical long pin 67 is embedded in the inner side of the limiting groove 12, thereby firmly locking the front tube 3 of the frame so that it cannot move at will; the front tube 3 of the frame is pulled by the connecting rod 68 and the second cylindrical long pin 67. Since the second cylindrical long pin 67 is subjected to force on both sides in the limiting groove 12, and the angle between the connecting rod 68 and the handle 61 is very small, the force generated by vibration during the movement of the bicycle is also very small on the handle 61.

[0027] The working principle of the present invention is as follows: the rear tube seat 1 is welded to the rear tube of the bicycle frame, and then the front tube seat 2 is welded to the front tube 3 of the bicycle frame. When the bicycle needs to be assembled together, the handle 61 is first pressed toward the locking block assembly 5, so that the handle 61 rotates around the first cylindrical long pin 65. When the positioning groove 63 is located at the lower end of the locking block 51, the locking block 51 is pressed from the right side and lower position of the locking block 51, so that the locking block 51 rotates clockwise around the locking block base 4, pushing the positioning head 55 into the positioning groove 63. After releasing the hand, the torsion spring 69 and the tower spring 52 rebound respectively, and the positioning head 55 is stuck in the positioning groove 63. The locking block assembly 5 and the handle assembly 6 are no longer separated, and the rear tube of the bicycle frame and the front tube 3 of the bicycle frame are assembled together.

[0028] When the bicycle needs to be disassembled for easy folding, the locking block 51 is squeezed from the left side of its upper end. The locking block 51 rotates counterclockwise to disengage the positioning head 55 from the positioning groove 63. The front tube seat 2 can then be removed from the rear tube seat 1. The rear tube and the front tube 3 of the bicycle frame can then be completely disassembled. This allows consumers to separate the bicycle into two parts when driving, even if the space in the car is relatively limited, so that the entire bicycle can be loaded into the car. Or, when storing the bicycle in indoor spaces such as homes, warehouses, or offices, the two parts can be stored separately to improve space utilization.

[0029] The above is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solutions and inventive concepts of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A detachable bicycle folding device, comprising a rear tube seat (1) and a front tube seat (2) embedded in one side of the rear tube seat (1), one end of the front tube seat (2) being fixedly connected to a front tube (3) of a bicycle frame by welding, and a locking block base (4) being welded to the front end of the outer side of the front tube (3) of the bicycle frame, characterized in that: The front side of the locking block base (4) is rotatably connected to the locking block assembly (5), and the front end of the rear tube seat (1) is rotatably connected to the handle assembly (6); the handle assembly (6) includes a handle (61), one end of the handle (61) is rotatably connected to a first cylindrical long pin (65), and a positioning groove (63) is provided on the upper side of the other end of the handle (61), and the front end of the handle (61) is engaged with a third screw (66) and a second screw (67) in sequence from left to right. 4), and a group of waist-shaped holes are opened on one side of the upper and lower ends of the handle (61) close to the positioning groove (63), and a cylindrical short pin (62) is embedded in the waist-shaped hole, and a connecting rod (68) is provided at one end of the outer side of the cylindrical short pin (62), and a torsion spring (69) is sleeved at the lower end of the connecting rod (68) on the outer side of the cylindrical short pin (62), and a second cylindrical long pin (67) is welded to one end of the connecting rod (68), and the locking block assembly (5) includes a locking block (51), The lower end of the locking block (51) is fixedly connected to a positioning head (55), and a through rotation hole (54) is opened at the front end of the locking block (51). A tower spring (52) is provided at the rear end of the locking block (51), and a round head hexagon socket screw (53) is embedded in the inner side of the rotation hole (54). The tower spring (52) and the locking block (51) are both sleeved on the locking block base (4), and the round head hexagon socket screw (53) is engaged with the front end of the locking block base (4). The positioning head (55) corresponds to the positioning groove (63), and the rear tube seat (1) includes a rear tube seat body (11). A group of limiting grooves (12) and a clamping groove (13) are respectively opened on one side of the rear tube seat body (11), and a first machine screw (16) is engaged and connected at the lower end of the other side of the rear tube seat body (11). An open groove (14) is opened in the middle of the front side of the rear tube seat body (11), and an axial hole (15) is opened at the upper and lower ends of the open groove (14).

2. The detachable bicycle folding device according to claim 1, characterized in that: Corresponding threaded holes are provided on the inner sides of the cylindrical short pin (62) and the connecting rod (68), and round head screws (611) are engaged and connected in the two threaded holes. An M8 machine screw (610) is engaged and connected at a position near the round head screw (611) at one end of the handle (61).

3. The detachable bicycle folding device according to claim 1, characterized in that: One end of the handle (61) is located inside the opening slot (14), and the first cylindrical long pin (65) is embedded in the inner side of the shaft hole (15) from bottom to top. The first cylindrical long pin (65) and the rear tube seat body (11) are fixedly connected by a first screw (16).

4. The detachable bicycle folding device according to claim 1, characterized in that: The front tube seat (2) is embedded in the inner side of the clamping groove (13), and a group of the limiting grooves (12) corresponds to the position of the second cylindrical long pin (67).

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