Novel swing car

Abstract

The invention relates to the technical field of bicycles, in particular to a novel swing bicycle which comprises a frame, wheels, a driving wheel and a crankshaft, the wheels and the driving wheel are rotationally installed on the frame, the driving wheel is located above the center of the wheels and makes friction contact with the wheels, and the crankshaft is installed on the driving wheel and drives the driving wheel to rotate in a front-back swing mode. And the rotating direction of the driving wheel is always opposite to that of the wheel when the swinging vehicle advances. In the whole riding process, the wheels are kept in a forward state all the time, riding is more coherent, the pedals and the crankshaft swing front and back, and the swing angle is smaller than 90 degrees, so that the movement amplitude of a rider is reduced, operation is more convenient, the physical ability of the rider is effectively distributed, the driving wheels are located above the wheels, a friction driving mode is adopted, and the driving efficiency is improved. Compared with the background technology, the height of the driving system is increased, the overall weight of the driving system is reduced, the swing car can be suitable for more wheels with small wheel diameters, the size of the swing car is smaller, and occupied space is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of bicycles, and in particular to a new type of swing bike. Background Art

[0002] As a tool for commuting, entertainment, fitness, acrobatic performances, general sports, extreme sports, and competitions, bicycles are widely used in various scenarios of the daily life of the public. Most of them adopt the double-wheel serial pedaling full-circle method, and a few adopt the unicycle pedaling full-circle method. Most of the double-wheel serial bicycles have complex structures and are not convenient for folding and use.

[0003] For this reason, the Chinese utility model patent CN201211910Y applied by the present applicant in 2008 and authorized and announced in 2009 discloses a "double-wheel crankshaft parallel pedal bike", which simplifies the vehicle body structure by adopting a special crankshaft structure and realizes the purpose of double-wheel parallelism.

[0004] Subsequently, in order to improve the convenience and safety of operation, the Chinese invention patent CN102152838B applied by the present applicant in 2011 and authorized and announced in 2015 discloses a "double-wheel crankshaft parallel swing bike", which adopts a special gearbox structure to achieve the effect of providing driving force by swinging the crankshaft back and forth.

[0005] The above-mentioned "double-wheel crankshaft parallel swing bike" is basically applicable to swing bikes with larger wheel sizes, such as wheel sizes of 24 inches and above. For smaller wheel sizes, such as 18 inches, due to the length of the crankshaft, the pedal may contact the ground or debris on the ground, making it impossible to swing the crankshaft normally or inconvenient to swing.

[0006] Therefore, in order to realize the smooth application of the crankshaft on smaller-sized wheels and facilitate the swinging of the rider's legs, the applicant continues to invest in research and development on the basis of the original design of the "double-wheel crankshaft parallel swing bike", aiming to provide a new type of swing bike to adapt to the use scenarios of smaller-sized wheels. Summary of the Invention

[0007] In order to adapt to smaller-sized wheels, the present invention provides a new type of swing bike.

[0008] The new type of swing bike provided by the present invention adopts the following technical solutions: A new type of swing bike includes a frame, wheels, a driving wheel, and a crankshaft. The wheels and the driving wheel are both rotatably installed on the frame. The driving wheel is located above the center of the wheels and is in frictional contact with the wheels. The crankshaft is installed on the driving wheel and drives the driving wheel to rotate by swinging back and forth. The rotation direction of the driving wheel is always opposite to the rotation direction of the wheels when the swing bike moves forward.

[0009] By adopting the above technical solutions, during the entire riding process, the wheels always maintain a forward state, making the driving more coherent. The pedals and the crankshaft swing back and forth, and the swing angle is less than 90°. This not only reduces the movement amplitude of the rider, making the operation more convenient, but also effectively distributes the physical energy of the rider. The driving wheel is located above the wheel and adopts a friction drive method. Compared with the prior art, the height of the drive system is increased, the overall weight of the drive system is reduced, the drive structure is simplified but the drive performance is enhanced, the durability of the drive system is stronger, and it can be adapted to more wheels with small wheel diameters. This swing car is smaller in volume, simpler in structure, and reduces the occupation of social space, social resources, road space, and storage space; compared with traditional unicycles, it solves problems such as difficulty in getting on the vehicle, high center of gravity when pedaling a full circle, and difficulty in balancing, making it easier for the rider to get on the vehicle and maintain balance.

[0010] Optionally, the driving wheel includes a wheel main body, an accommodating cavity is arranged inside the wheel main body, the crankshaft rotates through the central axis of the wheel main body, a rotating shaft is rotatably connected inside the wheel main body, the rotating shaft is arranged parallel to one side of the crankshaft, a driving gear and a driving one-way bearing are fixedly installed on the crankshaft, a driven gear and a driven one-way bearing are fixedly installed on the rotating shaft, the driving gear meshes with the driven gear and both are located inside the accommodating cavity, and both the driving one-way bearing and the driven one-way bearing are in interference fit with the wheel main body.

[0011] By adopting the above technical solutions, when pedaling forward with both feet, the crankshaft swings forward, and the swinging direction of the crankshaft is the same as the direction in which the wheel needs to move forward, that is, the wheel can rotate clockwise to move forward. At this time, the inner and outer rings of the driving one-way bearing are locked, the driving gear drives the driven gear to rotate, the driven gear and the rotating shaft rotate simultaneously, and at this time, the inner and outer rings of the driven one-way bearing are separated. Since the driving one-way bearing is in interference fit with the wheel main body, the driving wheel rotates counterclockwise. Since the wheel is in frictional contact with the driving wheel, the wheel rotates clockwise, and the swing car moves forward as a whole; when pedaling backward with both feet to drive the pedals, the crankshaft swings backward, and the swinging direction of the crankshaft is opposite to the direction in which the wheel needs to move forward. At this time, the inner and outer rings of the driving one-way bearing are separated. Since the driven gear meshes with the driving gear, the rotating shaft has a tendency to rotate in the reverse direction, resulting in the inner and outer rings of the driven one-way bearing being locked. And because the driven one-way bearing is in interference fit with the wheel main body, the driven gear can only make a circular motion around the driving gear. Since the driven gear cannot rotate itself, it can only drive the driving wheel to rotate counterclockwise. Since the wheel is in frictional contact with the driving wheel, the wheel rotates clockwise, and the swing car moves forward as a whole. Compared with the flywheel combination mechanism and the ratchet and pawl mechanism, the adoption of the one-way bearing simplifies the structure of the bearing and the one-way clutch combination and can be used as the most preferred implementation method.

[0012] Optionally, the crankshaft includes a first shaft rod passing through the driving wheel, a second shaft rod that can be axially telescoped is vertically fixed at the end of the first shaft rod, and a third shaft rod for installing the pedals is vertically fixed at the end of the second shaft rod away from the first shaft rod.

[0013] By adopting the above technical solution, the second shaft rod can axially expand and contract, achieving the purpose of adjustable crankshaft length to adapt to riders of different heights.

[0014] Optionally, the second shaft rod includes a mounting block for connecting the first shaft rod. A sleeve is fixed on the mounting block. A blocking block is fixed at one end of the sleeve away from the mounting block. An extension rod extending into the interior of the sleeve is slidably penetrated through the blocking block. One end of the extension rod is fixed to the third shaft rod, and a positioning nut is threadedly installed at the other end of the extension rod. A compression spring is also sleeved on the extension rod, and the compression spring elastically supports between the positioning nut and the blocking block.

[0015] By adopting the above technical solution, adopting the structural form of the extension rod, the positioning nut and the compression spring can achieve the purposes of adjustable crankshaft length, shock absorption and pedal rotation and storage, etc., to adapt to riders of different heights and the storage of the swing car.

[0016] Optionally, the sleeve is composed of multiple straight rods arranged in a surrounding manner and parallel to each other. One end of the straight rod is fixedly connected to the mounting block, and the other end of the straight rod is fixed to the blocking block.

[0017] By adopting the above technical solution, it is convenient for the installation and manufacture of the sleeve.

[0018] Optionally, the sleeve is of a tubular structure. The mounting block is threadedly installed at one end of the sleeve, and the blocking block is threadedly installed at the other end of the sleeve.

[0019] By adopting the above technical solution, the mounting block and the blocking block are of a detachable structural form, which is convenient for adjusting the position of the positioning nut.

[0020] Optionally, end caps are respectively arranged at both ends of the wheel body, and the end caps are fixed to the wheel body by fixing bolts.

[0021] By adopting the above technical solution, it is convenient to protect the internal structure of the wheel body and assemble the driving wheel.

[0022] Optionally, a ratchet clutch, a ratchet and pawl cooperation structure or a bearing, one-way clutch and gear cooperation structure can be arranged inside the driving wheel to cooperate with the crankshaft.

[0023] By adopting the above technical solution, the ratchet clutch, the ratchet and pawl cooperation structure or the bearing, one-way clutch and gear cooperation structure replace the one-way bearing and gear cooperation structure to achieve the same function.

[0024] Optionally, the frame includes a front fork, a seat support rod and a connecting rod. The wheel is rotatably installed on the front fork. The bottom end of the seat support rod is installed on the central axis of the wheel. The connecting rod is installed between the seat support rod and the front fork and is located above the wheel. The driving wheel is rotatably installed on the connecting rod through a crankshaft.

[0025] By adopting the above technical solution, a frame form that facilitates cycling and enables easy assembly and cooperation between the drive wheel and the wheel is provided, which is convenient for mass production and use. Description of the Drawings

[0026] Figure 1 It is a schematic structural diagram of the novel swing vehicle according to an embodiment of the present invention.

[0027] Figure 2 It is a schematic structural diagram of the crankshaft according to an embodiment of the present invention.

[0028] Figure 3 It is a cross-sectional view of the drive wheel according to an embodiment of the present invention.

[0029] Description of the reference numerals: 1, frame; 10, front fork; 11, seat support rod; 12, connecting rod; 2, wheel; 3, drive wheel; 30, wheel body; 300, accommodation cavity; 31, end cover; 32, fixing bolt; 33, rotating shaft; 34, driving gear; 35, driven gear; 36, driving one-way bearing; 37, driven one-way bearing; 4, crankshaft; 40, first shaft rod; 41, second shaft rod; 410, mounting block; 411, sleeve; 412, blocking block; 413, extension rod; 414, positioning nut; 415, compression spring; 42, third shaft rod; 5, pedal. Detailed Description of the Embodiment

[0030] The following is a further detailed description of the present invention in conjunction with the attached Figure 1 - attached Figure 3 drawings.

[0031] An embodiment of the present invention discloses a novel swing vehicle.

[0032] Referring to Figure 1 and Figure 2 , a novel swing vehicle includes a frame 1, a wheel 2, a drive wheel 3, a crankshaft 4 and a pedal 5. The frame 1 includes a front fork 10, a seat support rod 11 and a connecting rod 12. The wheel 2 is rotatably installed on the front fork 10. The bottom end of the seat support rod 11 is installed on the central axis of the wheel 2. The connecting rod 12 is installed between the front fork 10 and the seat support rod 11. There are two connecting rods 12 arranged in parallel and both are located directly above the wheel 2.

[0033] Referring to Figure 1 - Figure 3 , the drive wheel 3 is rotatably installed between the two connecting rods 12 and is in frictional contact with the wheel 2. The rotation of the drive wheel 3 drives the rotation of the wheel 2, and the rotation direction of the drive wheel 3 is opposite to that of the wheel 2. The drive wheel 3 includes a wheel body 30. The crankshaft 4 includes a first shaft rod 40 that passes through the central axis of the wheel body 30 and rotatably passes through the connecting rod 12. An accommodation cavity 300 is provided inside the wheel body 30. End covers 31 are respectively provided at the left and right ends of the wheel body 30. The two end covers 31 are fixed to the wheel body 30 by fixing bolts 32.

[0034] Refer to Figure 3 , a rotating shaft 33 is rotatably disposed between two end caps 31 and the wheel body 30. The rotating shaft 33 is disposed parallel to one side of the first shaft rod 40. A driving gear 34 is sleeved and fixed on the first shaft rod 40. A driven gear 35 is sleeved and fixed on the rotating shaft 33. The driven gear 35 meshes with the driving gear 34. Both the driving gear 34 and the driven gear 35 are located in the accommodating cavity 300.

[0035] Refer to Figure 3 , a driving one-way bearing 36 is installed on the first shaft rod 40. The inner ring of the driving one-way bearing 36 is in interference fit with the first shaft rod 40, and the outer ring of the driving one-way bearing 36 is in interference fit with the wheel body 30. A driven one-way bearing 37 is installed on the rotating shaft 33. The inner ring of the driven one-way bearing 37 is in interference fit with the rotating shaft 33, and the outer ring of the driven one-way bearing 37 is in interference fit with the wheel body 30.

[0036] Refer to Figure 1 and Figure 2 , the crankshaft 4 further includes a second shaft rod 41. There are two second shaft rods 41, which are respectively vertically fixed at both ends of the first shaft rod 40. In order to facilitate adaptation to riders of different heights, the second shaft rod 41 is a telescopic rod-shaped structure. A third shaft rod 42 is vertically fixed at one end of the second shaft rod 41 away from the first shaft rod 40. The pedal 5 is rotatably installed on the third shaft rod 42.

[0037] Refer to Figure 2 , the second shaft rod 41 includes a mounting block 410 detachably fixed to the end of the first shaft rod 40. A sleeve 411 composed of three straight rods evenly arranged along the circumference is fixedly connected to the mounting block 410. A blocking block 412 is fixedly connected to one end of the sleeve 411 away from the mounting block 410. In other embodiments, if the sleeve 411 is a circular tubular structure, the mounting block 410 and the blocking block 412 can both be fixed to the sleeve 411 by means of threaded installation.

[0038] Refer to Figure 2 , a prolonging rod 413 is slidably inserted through the axis of the blocking block 412 and extends into the sleeve 411. One end of the prolonging rod 413 is fixedly connected to the third shaft rod 42. The other end of the prolonging rod 413 is provided with an external thread. Two positioning nuts 414 are threadedly installed at the end of the prolonging rod 413 close to the mounting block 410. A compression spring 415 is also sleeved on the prolonging rod 413. The compression spring 415 is elastically supported between the positioning nut 414 and the blocking block 412. By adjusting the position of the positioning nut 414 on the prolonging rod 413, the overall length of the second shaft rod 41 can be changed to adapt to riders of different heights; if storage is required, the pedal 5 can be rotated 180° along the prolonging rod 413 to face the inside of the frame 1, so as to reduce the occupied space of the swing car as a whole.

[0039] In addition, the drive wheel 3 and the crankshaft 4 in the present invention can also be applied to tool fields such as wrenches. For example, a screw sleeve can be welded to the outer wall of the end cover 31, and the second shaft rod 41 can be used as a handle, thus serving as an efficient wrench. Moreover, the drive wheel 3 and the crankshaft 4 can also be extended and applied to fields of human-powered manual rotary drives such as gear drives, sprocket drives, and friction drives, and can be adaptively modified to meet actual usage requirements.

[0040] In other embodiments, a ratchet clutch, a ratchet and pawl cooperation structure, or a bearing, one-way clutch and gear cooperation structure can also be used to replace the one-way bearing and gear cooperation structure to achieve the same function.

[0041] The implementation principle of a new type of swing vehicle according to an embodiment of the present invention is as follows: First, the rider steps on the pedals 5 located on both sides to maintain balance.

[0042] When the rider pedals forward with both feet, that is: The crankshaft 4 swings forward, the first shaft rod 40 rotates counterclockwise. The swinging direction of the crankshaft 4 is the same as the direction in which the wheel 2 is to move forward, that is, the wheel 2 can rotate clockwise to move forward. At this time, the inner and outer rings of the active one-way bearing 36 are locked, and the active gear 34 drives the driven gear 35 to rotate. The driven gear 35 and the rotating shaft 33 rotate simultaneously. At this time, the inner and outer rings of the driven one-way bearing 37 are separated. Since the active one-way bearing 36 and the wheel body 30 are in interference fit, the drive wheel 3 rotates counterclockwise following the first shaft rod 40. Since the wheel 2 is in frictional contact with the drive wheel 3, the wheel 2 rotates clockwise, and the whole swing vehicle moves forward.

[0043] When the rider pedals backward with both feet, that is: The crankshaft 4 swings backward, the first shaft rod 40 rotates clockwise. The swinging direction of the crankshaft 4 is opposite to the direction in which the wheel 2 is to move forward. At this time, the inner and outer rings of the active one-way bearing 36 are separated. Since the driven gear 35 is meshed with the active gear 34, the rotating shaft 33 has a tendency to rotate in the reverse direction, resulting in the inner and outer rings of the driven one-way bearing 37 being locked. And because the driven one-way bearing 37 and the wheel body 30 are in interference fit, the driven gear 35 can only make a circular motion around the active gear 34. Since the driven gear 35 cannot rotate on its own, it can only drive the drive wheel 3 to rotate counterclockwise. Since the wheel 2 is in frictional contact with the drive wheel 3, the wheel 2 rotates clockwise, and the whole swing vehicle moves forward.

[0044] During the entire riding process, the wheel 2 always maintains a forward movement state, making the driving more coherent. The pedals 5 and the crankshaft 4 swing back and forth, and the swing angle is less than 90°. This not only reduces the movement amplitude of the rider, making the operation more convenient, but also effectively distributes the physical energy of the rider. The drive wheel 3 is located above the wheel 2 and uses a friction drive method. Compared with the background technology, the height of the drive part is increased, the overall weight of the drive part is reduced, and it can be adapted to more wheels 2 with small wheel diameters.

[0045] The second shaft rod 41 can be axially telescopic. With the structural form of an extension rod 413, a positioning nut 414 and a compression spring 415, it can achieve the purposes of adjusting the length of the crankshaft 4, shock absorption and the rotational storage of the pedal 5, so as to adapt to riders of different heights and the storage of the swing bike. The swing bike can also achieve the structural forms of single-wheel, double-wheel or multi-wheel series connection or parallel connection, with a wider application field and stronger applicability.

[0046] The above are all preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby. Therefore, all equivalent changes made according to the structure, shape and principle of the present invention shall be covered within the protection scope of the present invention.

Claims

1. A new type of swing car, characterized in that: It includes a frame (1), wheels (2), a drive wheel (3) and a crankshaft (4). The wheels (2) and the drive wheel (3) are both rotatably mounted on the frame (1). The drive wheel (3) is located above the center of the wheels (2) and is in frictional contact with the wheels (2). The crankshaft (4) is mounted on the drive wheel (3) and drives the drive wheel (3) to rotate by swinging back and forth. The rotation direction of the drive wheel (3) is always opposite to the rotation direction of the wheels (2) when the swing car moves forward.

2. The novel swing vehicle according to claim 1, wherein: The drive wheel (3) includes a wheel body (30). An accommodation cavity (300) is provided inside the wheel body (30). The crankshaft (4) rotatably passes through the axis of the wheel body (30). A rotating shaft (33) is rotatably connected inside the wheel body (30). The rotating shaft (33) is arranged parallel to one side of the crankshaft (4). A driving gear (34) and a driving one-way bearing (36) are fixedly mounted on the crankshaft (4). A driven gear (35) and a driven one-way bearing (37) are fixedly mounted on the rotating shaft (33). The driving gear (34) meshes with the driven gear (35) and both are located inside the accommodation cavity (300). The driving one-way bearing (36) and the driven one-way bearing (37) are both in interference fit with the wheel body (30).

3. The novel swing car according to claim 2, wherein: The crankshaft (4) includes a first shaft rod (40) passing through the drive wheel (3). A second shaft rod (41) that can axially expand and contract is perpendicularly fixed to the end of the first shaft rod (40). A third shaft rod (42) for mounting a pedal (5) is perpendicularly fixed to the end of the second shaft rod (41) away from the first shaft rod (40).

4. The novel swing vehicle according to claim 3, characterized in that: The second shaft rod (41) includes a mounting block (410) for connecting the first shaft rod (40). A sleeve (411) is fixed on the mounting block (410). A blocking block (412) is fixed to one end of the sleeve (411) away from the mounting block (410). An extension rod (413) extending into the inside of the sleeve (411) is slidably passed through the blocking block (412). One end of the extension rod (413) is fixed to the third shaft rod (42). A positioning nut (414) is threadedly mounted on the other end of the extension rod (413). A compression spring (415) is also sleeved on the extension rod (413). The compression spring (415) is elastically supported between the positioning nut (414) and the blocking block (412).

5. The novel swing car according to claim 4, characterized in that: The sleeve (411) is composed of multiple straight rods arranged in a surrounding manner and parallel to each other. One end of the straight rod is fixedly connected to the mounting block (410), and the other end is fixed to the blocking block (412).

6. The novel swing vehicle according to claim 4, wherein: The sleeve (411) is a tubular structure. The mounting block (410) is threadedly mounted on one end of the sleeve (411), and the blocking block (412) is threadedly mounted on the other end of the sleeve (411).

7. The novel swing car according to claim 2, characterized in that: End caps (31) are respectively arranged at both ends of the wheel body (30). The end caps (31) are fixed to the wheel body (30) by fixing bolts (32).

8. The novel swing car according to claim 1, characterized in that: A ratchet clutch, a ratchet and pawl cooperation structure, or a bearing, one-way clutch and gear cooperation structure can be arranged inside the drive wheel (3) to cooperate with the crankshaft (4) to work.

9. The novel swing vehicle according to any one of claims 1-8, characterized in that: The frame (1) includes a front fork (10), a seat post (11) and a connecting rod (12). The wheel (2) is rotatably mounted on the front fork (10). The bottom end of the seat post (11) is mounted on the central axis of the wheel (2). The connecting rod (12) is mounted between the seat post (11) and the front fork (10) and is located above the wheel (2). The drive wheel (3) is rotatably mounted on the connecting rod (12) through a crankshaft (4).

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