A multi-person bicycle with a synchronized center of gravity adjustment

Abstract

This utility model belongs to the field of bicycle technology and discloses a multi-person bicycle with a synchronously adjustable center of gravity. It includes a bicycle body, with a connecting frame fixedly installed at the right end of the bicycle body. Arc-shaped grooves are respectively formed at the top of the front and rear ends of the connecting frame, and a fixed shaft is fixedly sleeved at the bottom inside the connecting frame. This utility model, by setting up a connecting frame, arc-shaped grooves, a fixed shaft, a round rod, and a locking rod, allows the locking rod to move along the outer surface of the T-shaped block and compress the first spring when the locking rod is pulled, thus separating the locking rod and the round rod. Pushing the bicycle steering frame at this time causes the bicycle steering frame, along with the lower connecting block, upper connecting block, and round rod, to rotate around the fixed shaft along the inner surface of the connecting frame. This moves the round rod to the left end inside the arc-shaped groove, thereby increasing the front wheel's trail and shifting the center of gravity backward, ensuring stability when riding alone.

Description

Technical Field

[0001] This utility model belongs to the field of bicycle technology, specifically a multi-person bicycle with a synchronously adjustable center of gravity. Background Technology

[0002] The loft angle, fork offset, and trail of a bicycle are the points on the ground from which the front wheel steering axis (including the fork, handlebars, and the entire steering mechanism of the front wheel) extends, and the length of the lead-out point between the front wheel and the ground. These factors affect the handling of a bicycle. In the design of traditional bicycles (where the front wheel steering axis is slightly bent off the vertical line), regardless of the forward speed, a positive trail will turn the front wheel in the direction of the bicycle's lean. In other words, the greater the trail of a bicycle, the more stable it will be when riding.

[0003] Multi-person bicycles are gaining increasing attention in scenic areas. Riding a bicycle together not only enhances the fun of the trip but also fosters teamwork. When riding as a tandem, the weight distribution of a traditional multi-wheeled bicycle is even between the front and rear wheels, resulting in a smaller front wheel trail. However, when riding a multi-person bicycle alone, the fixed design of the steering frame in most traditional multi-person bicycles keeps the front wheel trail consistently low. This low front wheel trail affects the stability of the bicycle and poses a safety hazard, thus requiring improvement. Utility Model Content

[0004] The purpose of this invention is to provide a multi-person bicycle with a synchronously adjustable center of gravity to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a multi-person bicycle with a synchronously adjustable center of gravity, comprising a bicycle body, a connecting frame fixedly installed at the right end of the bicycle body, arc-shaped grooves respectively opened at the top of the front and rear ends of the connecting frame, a fixed shaft fixedly sleeved at the bottom inside the connecting frame, a lower connecting block movably sleeved on the outer surface of the fixed shaft, the outer surface of the lower connecting block movably sleeved on the inner surface of the connecting frame, a bicycle bogie fixedly installed at the right end of the lower connecting block, an upper connecting block fixedly installed on the left side of the outer surface of the bicycle bogie, the outer surface of the upper connecting block movably sleeved on the top of the inner surface of the connecting frame, a round rod fixedly sleeved inside the upper connecting block, the outer surface of the round rod movably sleeved on the inner surface of the arc-shaped groove, a locking rod movably connected to the front end of the connecting frame, the right end of the locking rod movably connected to the outer surface of the round rod, a T-shaped block movably sleeved at the bottom inside the locking rod, the rear end of the T-shaped block fixedly connected to the front end of the connecting frame, and a first spring fixedly installed at the top end of the T-shaped block inside the locking rod.

[0006] In a preferred embodiment of this invention, a pressure adjusting block is movably sleeved at the top of the locking rod, and the left side of the bottom end of the pressure adjusting block is fixedly connected to the top of the first spring. A U-shaped frame is fixedly installed at the right end of the locking rod, and the top of the inner surface of the U-shaped frame is movably sleeved to the right side of the outer surface of the pressure adjusting block. A threaded rod is movably sleeved inside the U-shaped frame, and the top of the outer surface of the threaded rod is threadedly sleeved to the inner surface of the pressure adjusting block. A first handle is fixedly sleeved at the bottom of the outer surface of the threaded rod, and the top of the first handle is movably connected to the bottom of the U-shaped frame.

[0007] As a preferred embodiment of this utility model, a fixing tube is fixedly sleeved inside the left end of the bicycle body, and a spare upright tube is movably sleeved inside the fixing tube.

[0008] As a preferred embodiment of this utility model, a sliding groove is provided on the right side of the outer surface of the spare riser, and a slider is movably sleeved at the top inside the sliding groove. The outer surface of the slider is fixedly connected to the top right side of the inner surface of the fixed pipe.

[0009] In a preferred embodiment of this invention, a fixing frame is fixedly sleeved on the top of the outer surface of the fixing tube, and a fixing block is fixedly sleeved on the left end of the fixing frame. The outer surface of the fixing block and the outer surface of the fixing tube are movably connected.

[0010] As a preferred embodiment of this utility model, a positioning groove is provided on the left side of the outer surface of the spare riser, and a positioning rod located at the top of the fixed pipe is movably sleeved inside the positioning groove. The left end of the positioning rod passes through the fixed pipe and the fixed block and extends to the outside of the fixed block.

[0011] As a preferred embodiment of this utility model, a movable block is movably sleeved on the right end inside the fixed block, the inner surface of the movable block is fixedly sleeved on the outer surface of the positioning rod, and a second spring located outside the positioning rod is fixedly installed on the left end of the movable block, and the other end of the second spring is fixedly connected to the left inner wall of the fixed block.

[0012] As a preferred embodiment of this utility model, a round shaft is fixedly installed on the left end of the positioning rod, and a second handle is movably sleeved on the outer surface of the round shaft. The right end of the second handle is movably connected to the left end of the fixing block.

[0013] In a preferred embodiment of this invention, a first seat post is movably sleeved on the left side of the top of the bicycle body, and a first seat cushion is fixedly installed on the top of the first seat post. A second seat post is movably sleeved on the middle of the top of the bicycle body, and a second seat cushion is fixedly installed on the top of the second seat post.

[0014] The beneficial effects of this utility model are as follows:

[0015] 1. This utility model, by setting a connecting frame, an arc-shaped groove, a fixed shaft, a round rod, and a locking rod, allows the locking rod to move along the outer surface of the T-shaped block and compress the first spring when the locking rod is pulled, thereby separating the locking rod and the round rod. At this time, pushing the bicycle steering frame will cause the bicycle steering frame, along with the lower connecting block, the upper connecting block, and the round rod, to rotate around the fixed shaft along the inner surface of the connecting frame, thereby moving the round rod to the left end inside the arc-shaped groove. This allows for an increase in the front wheel trail, thereby shifting the center of gravity backward and ensuring stability when riding alone.

[0016] 2. This utility model, by setting up a pressure adjusting block, a U-shaped frame, a threaded rod, and a first handle, when the first handle is rotated, the threaded rod will rotate along the inner surface of the U-shaped frame. Since the outer surface of the threaded rod and the inner surface of the pressure adjusting block are threadedly connected and the pressure adjusting block and the first spring are fixedly connected, the pressure adjusting block will move along the inner surface of the locking rod and compress the first spring. In this way, the elastic force of the first spring can be increased by adjusting the position of the pressure adjusting block, thereby ensuring the locking effect of the locking rod on the round rod when riding.

[0017] 3. This utility model, by setting a positioning groove, a positioning rod, a second spring, a round shaft, and a second handle, will cause the second handle to rotate around the round shaft when the second handle is turned. This will cause the round shaft to move along the inner surface of the fixed block under the action of the second handle, and compress the second spring, thereby causing the positioning rod and the positioning groove to separate. At this time, pulling the spare riser will cause the spare riser to move along the inner surface of the fixed pipe, thereby realizing the adjustment and locking of the height of the spare riser. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a cross-sectional view of the front of the present invention;

[0020] Figure 3 This is a cross-sectional structural diagram of the first handle of this utility model;

[0021] Figure 4 This is a partial structural diagram of the connecting frame of this utility model;

[0022] Figure 5 for Figure 2 A magnified schematic diagram of the local structure at point A;

[0023] Figure 6 for Figure 2 A magnified schematic diagram of the local structure at point B;

[0024] Figure 7 for Figure 3A magnified schematic diagram of the structure at point C.

[0025] In the diagram: 1. Bicycle body; 2. Connecting frame; 3. Arc groove; 4. Fixed shaft; 5. Lower connecting block; 6. Bicycle steering frame; 7. Upper connecting block; 8. Round rod; 9. Locking rod; 10. T-block; 11. First spring; 12. Adjusting block; 13. U-shaped frame; 14. Threaded rod; 15. First handlebar; 16. Fixed tube; 17. Spare riser; 18. Slide groove; 19. Slider; 20. Fixed frame; 21. Fixed block; 22. Positioning groove; 23. Positioning rod; 24. Movable block; 25. Second spring; 26. Round shaft; 27. Second handlebar; 28. First seat post; 29. ​​First seat cushion; 30. Second seat post; 31. Second seat cushion. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] like Figures 1 to 7 As shown, this utility model embodiment provides a multi-person bicycle with a synchronously adjustable center of gravity, including a bicycle body 1. A connecting frame 2 is fixedly installed on the right end of the bicycle body 1. Arc-shaped grooves 3 are respectively opened on the top of the front and rear ends of the connecting frame 2. A fixed shaft 4 is fixedly sleeved on the bottom end inside the connecting frame 2. A lower connecting block 5 is movably sleeved on the outer surface of the fixed shaft 4. The outer surface of the lower connecting block 5 is movably sleeved with the inner surface of the connecting frame 2. A bicycle bogie 6 is fixedly installed on the right end of the lower connecting block 5. The left side of the outer surface of the bicycle bogie 6 is fixedly... An upper connecting block 7 is fixedly installed. The top of the outer surface of the upper connecting block 7 is movably sleeved with the top of the inner surface of the connecting frame 2. A round rod 8 is fixedly sleeved inside the upper connecting block 7. The outer surface of the round rod 8 is movably sleeved with the inner surface of the arc groove 3. A locking rod 9 is movably connected to the front end of the connecting frame 2. The right end of the locking rod 9 is movably connected to the outer surface of the round rod 8. A T-shaped block 10 is movably sleeved inside the bottom end of the locking rod 9. The rear end of the T-shaped block 10 is fixedly connected to the front end of the connecting frame 2. A first spring 11 located inside the locking rod 9 is fixedly installed at the top of the T-shaped block 10.

[0028] When the locking lever 9 is pulled, it will move along the outer surface of the T-block 10 and compress the first spring 11, thereby separating the locking lever 9 from the round rod 8 and releasing the locking lever 9 from locking the round rod 8. At this time, pushing the bicycle bogie 6 will cause the bicycle bogie 6 to rotate around the fixed shaft 4 with the lower connecting block 5 as the axis, thereby causing the upper connecting block 7, which is fixedly connected to the bicycle bogie 6, to move along the inner surface of the arc groove 3 with the round rod 8. When the round rod 8 moves to the left side inside the arc groove 3, the locking lever 9 is released, so that the locking lever 9 returns to its original position under the restoring action of the first spring 11 and locks the round rod 8 again. This increases the front wheel trail, shifts the center of gravity backward, and ensures the stability of single-person riding.

[0029] The locking rod 9 has a pressure regulating block 12 movably sleeved at its top end. The left side of the bottom end of the pressure regulating block 12 is fixedly connected to the top end of the first spring 11. A U-shaped frame 13 is fixedly installed at the right end of the locking rod 9. The top of the inner surface of the U-shaped frame 13 is movably sleeved to the right side of the outer surface of the pressure regulating block 12. A threaded rod 14 is movably sleeved inside the U-shaped frame 13. The top of the outer surface of the threaded rod 14 is threadedly sleeved to the inner surface of the pressure regulating block 12. A first handle 15 is fixedly sleeved at the bottom of the outer surface of the threaded rod 14. The top end of the first handle 15 is movably connected to the bottom end of the U-shaped frame 13.

[0030] When the first handle 15 is turned, the threaded rod 14 will rotate. Since the outer surface of the threaded rod 14 and the inner surface of the pressure adjusting block 12 are threaded together, the pressure adjusting block 12 will move along the inner surface of the locking rod 9 and the U-shaped frame 13 under the action of the threaded rod 14 and compress the first spring 11, thereby increasing the elastic force of the first spring 11 and improving the stability of the locking rod 9.

[0031] Among them, a fixed tube 16 is fixedly connected to the inside of the left end of the bicycle body 1, and a spare upright tube 17 is movably connected to the inside of the fixed tube 16.

[0032] The inner surface of the fixed pipe 16 and the outer surface of the spare riser 17 are both smooth, which ensures that the spare riser 17 will not get stuck when it moves along the inner surface of the fixed pipe 16. At the same time, a pipe clamp is also provided at the top of the spare riser 17.

[0033] Among them, a groove 18 is provided on the right side of the outer surface of the spare riser 17, and a slider 19 is movably sleeved on the top inside the groove 18. The outer surface of the slider 19 is fixedly connected to the top right side of the inner surface of the fixed tube 16.

[0034] With the cooperation of the slide groove 18 and the slider 19, when the spare riser 17 moves along the inner surface of the fixed tube 16, the spare riser 17 will be blocked and restricted, thereby preventing the spare riser 17 from rotating along the inner surface of the fixed tube 16.

[0035] The top of the outer surface of the fixed tube 16 is fixedly sleeved with a fixed frame 20, and the left end of the fixed frame 20 is fixedly sleeved with a fixed block 21. The outer surface of the fixed block 21 and the outer surface of the fixed tube 16 are movably connected.

[0036] The presence of the fixing bracket 20 will support and fix the fixing block 21, thereby ensuring the stability of the fixing block 21.

[0037] The spare riser 17 has a positioning groove 22 on the left side of its outer surface. The positioning groove 22 is movably fitted with a positioning rod 23 located at the top of the fixed pipe 16. The left end of the positioning rod 23 passes through the fixed pipe 16 and the fixed block 21 and extends to the outside of the fixed block 21.

[0038] The positioning grooves 22 are evenly distributed on the left side of the outer surface of the spare riser 17. The height of the spare riser 17 can be adjusted and locked by the cooperation of the positioning grooves 22 and the positioning rods 23.

[0039] The right end of the fixed block 21 is movably sleeved with a movable block 24. The inner surface of the movable block 24 is fixedly sleeved with the outer surface of the positioning rod 23. The left end of the movable block 24 is fixedly installed with a second spring 25 located outside the positioning rod 23. The other end of the second spring 25 is fixedly connected to the left inner wall of the fixed block 21.

[0040] When the positioning rod 23 moves, it will move along the inner surface of the fixed block 21 with the movable block 24 and compress the second spring 25. Under the restoring action of the second spring 25, the movable block 24 will be forced to return to its original position with the positioning rod 23.

[0041] The left end of the positioning rod 23 is fixedly installed with a round shaft 26, and the outer surface of the round shaft 26 is movably sleeved with a second handle 27. The right end of the second handle 27 is movably connected to the left end of the fixing block 21.

[0042] When the second handle 27 is turned, it will rotate around the circular shaft 26. As the second handle 27 rotates, it will lift the circular shaft 26, causing the circular shaft 26 to move outward along the inner surface of the fixed block 21 with the positioning rod 23.

[0043] The bicycle body 1 has a first seat post 28 movably connected to the left side of its top end, and a first seat cushion 29 fixedly installed at the top end of the first seat post 28. The bicycle body 1 has a second seat post 30 movably connected to the middle of its top end, and a second seat cushion 31 fixedly installed at the top end of the second seat post 30.

[0044] The first seat post 28 and the second seat post 30 are both connected and fixed to the bicycle body 1 by seat post clamps, thereby ensuring the stability of the first seat cushion 29 and the second seat cushion 31.

[0045] Working principle and usage process:

[0046] When riding alone, the operator first removes the second seatpost 30 and the second seat cushion 31 using the seatpost clamp on the bicycle body 1. Then, the second seatpost 30 and the second seat cushion 31 are inserted into the spare seatpost 17 and secured with the seatpost clamp on the spare seatpost 17. Subsequently, the operator moves the second handlebar 27 according to their needs, causing it to rotate around the shaft 26. At this time, the shaft 26, along with the rotation of the second handlebar 27, moves the positioning rod 23 and the movable block 24 along the inner surface of the fixed block 21, compressing the second spring 25. When the second handlebar 27 rotates ninety degrees, the second spring... Under the restoring action of the spring 25, the second handlebar 27 will be held in place, and the positioning rod 23 will be completely separated from the positioning groove 22. Then, the operator can pull the spare riser 17 to adjust its height. After the spare riser 17 is adjusted, the operator will reset the second handlebar 27. At this time, under the restoring action of the second spring 25, the positioning rod 23 will also be embedded in the corresponding positioning groove 22, thereby locking the position of the spare riser 17. In this way, by adjusting the height of the spare riser 17 and locking it, the second seat post 30 and the second seat pad 31 can be prevented from obstructing the ride after being inserted into the spare riser 17.

[0047] After the first seat cushion 29 and the second seat cushion 31 are adjusted, the operator pulls the locking lever 9, causing it to move along the outer surface of the T-block 10 and compress the first spring 11. This separates the locking lever 9 from the round rod 8, releasing the locking lever 9 from locking the round rod 8. Then, the operator pushes the bicycle steering frame 6, causing it to move along the inner surface of the arc groove 3 via the lower connecting block 5 with the fixed shaft 4 as the axis, carrying the round rod 8 and the upper connecting block 7, until the round rod 8 moves to the left end inside the arc groove 3. At this point, the operator can release the locking lever 9, allowing it to reset under the restoring action of the first spring 11 and relock the round rod 8. This increases the front wheel trail, shifting the center of gravity backward and ensuring stability when riding alone.

[0048] Finally, the operator turns the first handle 15, causing the threaded rod 14 to rotate. This causes the adjusting block 12, which is threaded onto the outer surface of the threaded rod 14, to move along the inner surface of the locking rod 9 and compress the first spring 11, thereby increasing the elastic force of the first spring 11. This ensures the locking effect of the locking rod 9 on the round rod 8 during riding, thus ensuring the stability of the locking rod 9 and the round rod 8 after adjustment.

[0049] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0050] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multi-person bicycle with synchronized adjustment of the center of gravity, comprising a bicycle body (1), characterized in that: A connecting frame (2) is fixedly installed on the right end of the bicycle body (1). Arc-shaped grooves (3) are respectively opened at the top of the front and rear ends of the connecting frame (2). A fixed shaft (4) is fixedly sleeved inside the bottom of the connecting frame (2). A lower connecting block (5) is movably sleeved on the outer surface of the fixed shaft (4). The outer surface of the lower connecting block (5) is movably sleeved with the inner surface of the connecting frame (2). A bicycle bogie (6) is fixedly installed on the right end of the lower connecting block (5). An upper connecting block (7) is fixedly installed on the left side of the outer surface of the bicycle bogie (6). The outer surface of the upper connecting block (7) and... The top of the inner surface of the connecting frame (2) is movably sleeved, and the inside of the upper connecting block (7) is fixedly sleeved with a round rod (8). The outer surface of the round rod (8) and the inner surface of the arc groove (3) are movably sleeved. The front end of the connecting frame (2) is movably connected with a locking rod (9). The right end of the locking rod (9) is movably connected with the outer surface of the round rod (8). The bottom end of the locking rod (9) is movably sleeved with a T-shaped block (10). The rear end of the T-shaped block (10) is fixedly connected with the front end of the connecting frame (2). The top end of the T-shaped block (10) is fixedly installed with a first spring (11) located inside the locking rod (9).

2. A multi-person bicycle with synchronized adjustable gravity center according to claim 1, characterized in that: The top of the locking rod (9) is movably sleeved with a pressure adjusting block (12). The left side of the bottom end of the pressure adjusting block (12) is fixedly connected to the top of the first spring (11). A U-shaped frame (13) is fixedly installed on the right end of the locking rod (9). The top of the inner surface of the U-shaped frame (13) is movably sleeved with the right side of the outer surface of the pressure adjusting block (12). A threaded rod (14) is movably sleeved inside the U-shaped frame (13). The top of the outer surface of the threaded rod (14) is threadedly sleeved with the inner surface of the pressure adjusting block (12). A first handle (15) is fixedly sleeved on the bottom of the outer surface of the threaded rod (14). The top of the first handle (15) is movably connected with the bottom of the U-shaped frame (13).

3. A gravity center synchronously adjustable multi-person bicycle according to claim 1, characterized in that: A fixing tube (16) is fixedly sleeved inside the left end of the bicycle body (1), and a spare upright tube (17) is movably sleeved inside the fixing tube (16).

4. A gravity center synchronously adjustable multi-person bicycle according to claim 3, characterized in that: A groove (18) is provided on the right side of the outer surface of the spare riser (17). A slider (19) is movably sleeved on the top inside the groove (18). The outer surface of the slider (19) is fixedly connected to the top right side of the inner surface of the fixed tube (16).

5. A gravity center synchronously adjustable multi-person bicycle according to claim 3, characterized in that: A fixing frame (20) is fixedly sleeved on the top of the outer surface of the fixing tube (16), and a fixing block (21) is fixedly sleeved on the left end of the fixing frame (20). The outer surface of the fixing block (21) and the outer surface of the fixing tube (16) are movably connected.

6. A gravity center synchronously adjustable multi-person bicycle according to claim 3, characterized in that: A positioning groove (22) is provided on the left side of the outer surface of the spare riser (17). A positioning rod (23) located at the top of the fixed pipe (16) is movably sleeved inside the positioning groove (22). The left end of the positioning rod (23) passes through the fixed pipe (16) and the fixed block (21) and extends to the outside of the fixed block (21).

7. A gravity center synchronously adjustable multi-person bicycle according to claim 5, characterized in that: A movable block (24) is movably sleeved on the right end inside the fixed block (21). The inner surface of the movable block (24) is fixedly sleeved on the outer surface of the positioning rod (23). A second spring (25) located outside the positioning rod (23) is fixedly installed on the left end of the movable block (24). The other end of the second spring (25) is fixedly connected to the left inner wall of the fixed block (21).

8. A gravity center synchronously adjustable multi-person bicycle according to claim 6, characterized in that: A round shaft (26) is fixedly installed on the left end of the positioning rod (23), and a second handle (27) is movably sleeved on the outer surface of the round shaft (26). The right end of the second handle (27) is movably connected to the left end of the fixing block (21).

9. The gravity center synchronously adjustable multi-person bicycle according to claim 1, characterized in that: The first seat post (28) is movably sleeved on the left side of the top of the bicycle body (1), and the first seat pad (29) is fixedly installed on the top of the first seat post (28). The second seat post (30) is movably sleeved on the middle of the top of the bicycle body (1), and the second seat pad (31) is fixedly installed on the top of the second seat post (30).

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