Front and rear single arm type folding bicycle with positioning mechanism

Abstract

The utility model discloses a front and rear single arm type folding bicycle with a positioning mechanism, which comprises a main beam, a front wheel and a rear wheel, the main beam comprises a front beam, a rear beam and a fixing component used for detachably connecting the front beam and the rear beam, a front fork arm is arranged at the vertical end of the front beam, and a rear fork arm is fixedly connected with the outer surface wall of the vertical end of the rear beam. According to the folding bicycle, after the locking rod is separated, the front seat and the rear seat are rotationally matched through rotation, the main beam is folded, the front portion of the bicycle coincides with the follow-up folding portion, and therefore the bicycle is stored, the front fork arm and the rear fork arm are each of a single-arm design, the folded space can be reduced to the minimum through the single-arm space, the front fork arm is located on the left side of the front wheel, and the rear fork arm is located on the right side of the rear wheel. The rear fork arm is located on the right side of the rear wheel, through the staggered design of the front fork arm and the rear fork arm, the gravity center of the bicycle is centered when the bicycle is ridden, and control deviation caused by single arms on the same side is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of folding bicycles, in particular to a front and rear single-arm folding bicycle with a positioning mechanism. Background Art

[0002] A folding bicycle is a type of bicycle with a unique design that is easy to carry and store. Compared with traditional bicycles, the biggest feature of a folding bicycle is that it can be quickly folded into a smaller size, making it easier for users to carry it into public transportation, offices or homes.

[0003] Chinese patent publication number CN219821650U, publication date 20231013, discloses a folding bicycle, comprising: a frame, the frame including a main beam tube, a head tube, a seat tube, a bottom bracket tube, a rear fork and a cable; the main beam tube includes a front section and a rear section hinged to each other, the head tube is connected to the front section, the seat tube is connected to the rear section, and the bottom bracket tube and the rear fork are both connected to the seat tube; the front section can move relative to the rear section to enable the frame to switch between a folded state and an unfolded state; the two ends of the cable are respectively connected to the front section and the bottom bracket tube, when the frame is in the unfolded state, the cable is tensioned, and when the frame is in the folded state, the cable can be deformed and bent; a handlebar, a rear wheel and a wiring harness, the handlebar is connected to the head tube, and the rear wheel is mounted on the rear fork.

[0004] Existing folding bicycles such as the above-mentioned ones all have a front and rear double fork leg design. Due to the front and rear double fork legs, the size of the front and rear double fork legs limits the width of the vehicle after folding. Folding bicycles can be further optimized in the direction of reducing the footprint. Therefore, it is urgent to propose a corresponding front and rear single-arm folding bicycle with a positioning mechanism to solve the above-mentioned problem. Utility Model Content

[0005] The purpose of the utility model is to solve the above problems and to propose a front and rear single-arm folding bicycle with a positioning mechanism.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0007] A front and rear single-arm folding bicycle with a positioning mechanism includes a main beam, a front wheel and a rear wheel. The main beam includes a front beam, a rear beam and a fixing assembly for detachably connecting the front beam and the rear beam. A front fork arm is provided at the vertical end of the front beam, and a rear fork arm is fixedly connected to the outer wall of the vertical end of the rear beam. The front fork arm and the rear fork arm are respectively rotatably coordinated with the front wheel and the rear wheel, and the front fork arm and the rear fork arm are distributed on the side opposite to the front wheel and the rear wheel.

[0008] Preferably, the fixing assembly includes a front seat and a rear seat fixedly connected to the front beam and the rear beam respectively, the front seat and the rear seat are rotatably connected via a rotating shaft, the side of the front seat away from the rotating shaft is fixedly connected to an external frame, the side of the rear seat away from the rotating shaft is fixedly connected to an upper protrusion and a lower protrusion, and the external frame, the upper protrusion and the lower protrusion are fixedly connected via a locking rod.

[0009] Preferably, the locking rod includes a smooth section and a threaded section, the smooth section is slidingly connected to the inner wall of the upper protrusion, the outer frame and the inner wall of the lower protrusion are both screwed together with the threaded section, and the inner wall of the upper protrusion is provided with a limiting portion for limiting axial loosening of the locking rod.

[0010] Preferably, the limiting portion includes a limiting bar, a movable plate, a pulling member for pulling the limiting bar, and an elastic member for maintaining the position of the limiting bar. The limiting bar is fixedly connected to the movable plate, and the limiting bar is inserted into the smooth section through a coupling groove.

[0011] Preferably, the pulling member includes a pulling plate slidably connected to the inner surface wall of the upper protrusion, and the middle part of the rear end surface of the pulling plate is rotatably connected to the middle part of the front end surface of the movable plate.

[0012] Preferably, the elastic member includes a spring fixedly connected to the movable plate and the inner surface wall of the upper protrusion.

[0013] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0014] 1. In the present application, after the locking lever is separated, the front seat and the rear seat cooperate by rotating to fold the main beam, and the front part of the bicycle overlaps with the subsequent overlap, thereby realizing the storage of the bicycle. The front fork arm and the rear fork arm both adopt a single-arm design, and the space after folding can be reduced to a minimum by utilizing the space of the single arm. The front fork arm is located on the left side of the front wheel, and the rear fork arm is located on the right side of the rear wheel. Through the staggered design of the front fork arm and the rear fork arm, the center of gravity of the vehicle is centered when riding, avoiding the control deviation caused by the single arm on the same side.

[0015] 2. In the present application, when the bicycle is folded, the movable plate is pulled by the pull plate, and the spring links the limit bar and stretches the spring until the pull plate is completely extended out of the upper protrusion. Then the pull plate is rotated to make it cross-staggered with the movable plate. The pull plate is overlapped on the outer wall of the upper protrusion under the action of the spring, and the limit bar remains in a state of separation from the coupling groove. At this time, the locking rod can be separated from the upper protrusion. Similarly, when the bicycle is opened, after the upper protrusion, the outer frame and the lower protrusion are fixed by the locking rod, the pull plate is reset. At the same time, the spring drives the movable plate and the pull plate to be stored in the upper protrusion, and the limit bar is inserted into the coupling groove on the locking rod. In this way, the axial positioning of the locking rod can be realized to prevent the locking rod from loosening, thereby improving the stability of the front and rear single-arm folding bicycle. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Shows a schematic diagram of the overall structure provided according to an embodiment of the utility model;

[0017] Figure 2 A schematic diagram of the front fork arm structure provided according to an embodiment of the present utility model is shown;

[0018] Figure 3 A schematic diagram of the external frame structure provided according to an embodiment of the utility model is shown;

[0019] Figure 4 A schematic diagram of a spring structure provided according to an embodiment of the utility model is shown.

[0020] Legend:

[0021] 1. Main beam; 101. Front beam; 102. Rear beam; 2. Front fork arm; 3. Front wheel; 4. Rear fork arm; 5. Rear wheel; 6. Front seat; 7. Rear seat; 8. Rotating shaft; 9. Outer frame; 10. Upper protrusion; 11. Lower protrusion; 12. Locking rod; 13. Combination groove; 14. Pull plate; 15. Moving plate; 16. Limiting strip; 17. Spring. DETAILED DESCRIPTION

[0022] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] See also Figure 1-4 , the utility model provides a technical solution:

[0024] A front and rear single-arm folding bicycle with a positioning mechanism includes a main beam 1, a front wheel 3, and a rear wheel 5. The main beam 1 includes a front beam 101, a rear beam 102, and a fixing assembly for detachably connecting the front beam 101 and the rear beam 102. A front fork arm 2 is provided at the vertical end of the front beam 101, and a rear fork arm 4 is fixedly connected to the outer wall of the vertical end of the rear beam 102. The front fork arm 2 and the rear fork arm 4 are respectively rotatably engaged with the front wheel 3 and the rear wheel 5, and are distributed on the side opposite to the front wheel 3 and the rear wheel 5.

[0025] After separating the locking rod 12, the front seat 6 and the rear seat 7 cooperate through the rotating shaft 8 to fold the main beam 1, and the front part of the bicycle overlaps with the subsequent overlap, so as to realize the storage of the bicycle. The front fork arm 2 and the rear fork arm 4 both adopt a single-arm design, and the single-arm space can be used to reduce the folded space to a minimum. The front fork arm 2 is located on the left side of the front wheel 3, and the rear fork arm 4 is located on the right side of the rear wheel 5. Through the staggered design of the front fork arm 2 and the rear fork arm 4, the center of gravity of the vehicle is centered when riding, avoiding the control deviation caused by the single arm on the same side.

[0026] Specifically, such as Figure 2 and Figure 4 As shown, the fixing assembly includes a front seat 6 and a rear seat 7 fixedly connected to the front beam 101 and the rear beam 102 respectively, and the front seat 6 and the rear seat 7 are rotatably connected via a rotating shaft 8. The side of the front seat 6 away from the rotating shaft 8 is fixedly connected to an outer frame 9, and the side of the rear seat 7 away from the rotating shaft 8 is fixedly connected to an upper protrusion 10 and a lower protrusion 11, and the outer frame 9, the upper protrusion 10 and the lower protrusion 11 are fixedly connected by a locking rod 12, thereby ensuring that the front beam 101 and the rear beam 102 are easy to disassemble and assemble.

[0027] Specifically, such as Figure 2 and Figure 3 As shown, the locking rod 12 includes a smooth section and a threaded section, the smooth section is slidably connected to the inner wall of the upper protrusion 10, the outer frame 9 and the inner wall of the lower protrusion 11 are both screwed together with the threaded section, and the inner wall of the upper protrusion 10 is provided with a limiting portion for limiting the axial loosening of the locking rod 12, the limiting portion includes a limiting bar 16, a movable plate 15, a pulling member for pulling the limiting bar 16 and an elastic member for maintaining the position of the limiting bar 16, the limiting bar 16 is fixedly connected to the movable plate 15, the limiting bar 16 is inserted into the smooth section through the coupling groove 13, the pulling member includes a pulling plate 14 slidably connected to the inner wall of the upper protrusion 10, the middle part of the rear end face of the pulling plate 14 is rotatably connected to the middle part of the front end face of the movable plate 15, the elastic member includes a spring 17 fixedly connected to the movable plate 15 and the inner wall of the upper protrusion 10, when the bicycle is folded, the movable plate is pulled by the pulling plate 14. 15, the spring 17 links the limit bar 16 and stretches the spring 17 until the pull plate 14 is fully extended from the upper protrusion 10, and then the pull plate 14 is rotated to make it cross-displaced with the movable plate 15. The pull plate 14 is overlapped on the outer wall of the upper protrusion 10 under the action of the spring 17, and the limit bar 16 keeps the state of separating the coupling groove 13. At this time, the locking rod 12 can be separated from the upper protrusion 10. Similarly, when the bicycle is opened, after the upper protrusion 10, the outer frame 9 and the lower protrusion 11 are fixed by the locking rod 12, the pull plate 14 is reset. The spring 17 drives the movable plate 15 and the pull plate 14 to be retracted into the upper protrusion 10, and the limit bar 16 is inserted into the coupling groove 13 on the locking rod 12. In this way, the axial positioning of the locking rod 12 can be realized to prevent the locking rod 12 from loosening, thereby improving the stability of the front and rear single-arm folding bicycle.

[0028] Working principle: After separating the locking rod 12, the front seat 6 and the rear seat 7 cooperate with the rotating shaft 8 to fold the main beam 1, and the front part of the bicycle overlaps with the subsequent overlap, so as to realize the storage of the bicycle. The front fork arm 2 and the rear fork arm 4 both adopt a single-arm design, and the single-arm space can be used to reduce the space after folding to a minimum, and the front fork arm 2 is located on the left side of the front wheel 3, and the rear fork arm 4 is located on the right side of the rear wheel 5. The staggered design of the front fork arm 2 and the rear fork arm 4 makes the center of gravity of the vehicle centered when riding, avoiding the control deviation of the single arm on the same side. When the bicycle is folded, the moving plate 15 is pulled by the pull plate 14, and the spring 17 links the limit bar 16 and stretches the spring 17 until the pull plate 14 is fully extended from the upper protrusion 10 , then rotate the pull plate 14 so that it is cross-displaced with the movable plate 15. The pull plate 14 is overlapped on the outer wall of the upper protrusion 10 under the action of the spring 17, and the limit strip 16 remains in the state of separating the coupling groove 13. At this time, the locking rod 12 can be separated from the upper protrusion 10. Similarly, when the bicycle is opened, after the upper protrusion 10, the outer frame 9 and the lower protrusion 11 are fixed by the locking rod 12, the pull plate 14 is reset. The spring 17 drives the movable plate 15 and the pull plate 14 to be retracted into the upper protrusion 10. At the same time, the limit strip 16 is inserted into the coupling groove 13 on the locking rod 12, so as to realize the axial positioning of the locking rod 12 and prevent the locking rod 12 from loosening, thereby improving the stability of the front and rear single-arm folding bicycle.

[0029] The above description of the embodiments is intended to enable those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A front and rear single-arm folding bicycle with a positioning mechanism, comprising a main beam (1), a front wheel (3) and a rear wheel (5), characterized in that: The main beam (1) comprises a front beam (101), a rear beam (102) and a fixing assembly for detachably connecting the front beam (101) and the rear beam (102); a front fork arm (2) is provided at a vertical end of the front beam (101); a rear fork arm (4) is fixedly connected to an outer wall of a vertical end of the rear beam (102); the front fork arm (2) and the rear fork arm (4) are respectively rotatably matched with the front wheel (3) and the rear wheel (5), and the front fork arm (2) and the rear fork arm (4) are distributed on a side opposite to the front wheel (3) and the rear wheel (5).

2. A front and rear single-arm folding bicycle with a positioning mechanism according to claim 1, characterized in that: The fixing assembly comprises a front seat (6) and a rear seat (7) fixedly connected to the front beam (101) and the rear beam (102) respectively, the front seat (6) and the rear seat (7) being rotatably connected via a rotating shaft (8), the side of the front seat (6) away from the rotating shaft (8) being fixedly connected to an outer frame (9), the side of the rear seat (7) away from the rotating shaft (8) being fixedly connected to an upper protrusion (10) and a lower protrusion (11), and the outer frame (9), the upper protrusion (10) and the lower protrusion (11) being fixedly connected via a locking rod (12).

3. A front and rear single-arm folding bicycle with a positioning mechanism according to claim 2, characterized in that: The locking rod (12) comprises a smooth section and a threaded section, the smooth section is slidably connected to the inner surface wall of the upper protrusion (10), the outer frame (9) and the inner surface wall of the lower protrusion (11) are both screwed together with the threaded section, and the inner surface wall of the upper protrusion (10) is provided with a limiting portion for limiting axial loosening of the locking rod (12).

4. A front and rear single-arm folding bicycle with a positioning mechanism according to claim 3, characterized in that: The limiting portion comprises a limiting strip (16), a movable plate (15), a pulling member for pulling the limiting strip (16), and an elastic member for maintaining the position of the limiting strip (16); the limiting strip (16) is fixedly connected to the movable plate (15); and the limiting strip (16) is inserted into the interior of the smooth section through a coupling groove (13).

5. A front and rear single-arm folding bicycle with a positioning mechanism according to claim 4, characterized in that: The pulling member comprises a pulling plate (14) slidably connected to the inner surface wall of the upper protruding piece (10), and the middle portion of the rear end surface of the pulling plate (14) is rotatably connected to the middle portion of the front end surface of the moving plate (15).

6. A front and rear single-arm folding bicycle with a positioning mechanism according to claim 5, characterized in that: The elastic member comprises a spring (17) fixedly connected to the movable plate (15) and the inner surface wall of the upper protruding piece (10).

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