CN211844777U - Dual-purpose space bicycle of marking time stands to sit - Google Patents

Abstract

The application provides a stand and sit dual-purpose space bicycle of marking time, the novel bicycle innovation of this application adopts to stand or sit the dual-type mode and ride, the footboard of the left and right sides is trampled from top to bottom respectively when riding, the one-way noiseless ratchet that drives the left and right sides is connected through the chain drives the bicycle and gos forward, especially when standing and riding, the health can stand upright naturally, more open than riding traditional bicycle field of vision, the head, positions such as neck shoulder and both hands are more relaxed naturally, do reciprocating motion from top to bottom through the left and right sides footboard in turn, more natural also more laborsaving than 360 degrees circular motion of traditional bicycle, can stand at any time when riding, sit and switch, even ride for a long time and also be tired. Compared with the traditional bicycle, the left pedal and the right pedal are linked with each other, the left pedal and the right pedal of the novel bicycle are independent and do not interfere with each other when doing work, when the running resistance on a flat road is low, both feet can reliably tread forward, the vehicle can run at high speed by utilizing less work doing strokes, and the easy switching is freely selected.

Description

Dual-purpose space bicycle of marking time stands to sit

Technical Field

The utility model relates to a bicycle field indicates a stand and sit dual-purpose space bicycle of marking time especially.

Background

Due to the fact that the technology is developed today, although the living standard of people is continuously improved, the working pressure is continuously increased, the exercise and fitness time is less and less, and most of the bodies of people are in a serious sub-health state, the pedal bicycle with the fitness function is increasingly popular as a travel tool for body building and walking.

However, in the existing pedal riding bicycle, a crank is arranged on a chain wheel, pedals are arranged on the crank, and left and right pedaling forces are given by left and right trundle streams, so that the pedals drive the crank and further drive the chain wheel to rotate, and the purpose of advancing the bicycle is achieved. Since such a bicycle needs to be ridden in a sitting posture, there are the following drawbacks: 1) when people ride the bicycle with the back in a bow mode for a long time, the lumbar vertebra and the cervical vertebra are damaged; 2) when the saddle is used for a long time, the blood flow of legs is easy to be pressed and perineum is easy to be pressed, so that diseases such as prostate and the like are caused, and the health of a human body is damaged; 3) the gravity center is high, the stability is poor, and the control difficulty is high, so that the difficulty in learning is high, and the device is not suitable for children and old people; 4) in addition, the pedal drives the chain wheel to do circular motion through the crank, when the left pedal and the right pedal are positioned on a vertical plane, the moment is zero, and belongs to a dead point of exertion, and although the moment is maximum when the left pedal and the right pedal are positioned on a horizontal plane, the pedal is very hard to step on, and the pedal has the defects of high energy consumption and low work applying efficiency.

Disclosure of Invention

In order to solve the problems, the utility model provides a stand and sit dual-purpose space bicycle of marking time adopts stand or sit the dual-purpose bicycle of riding, and independent mutually noninterfere when the left and right sides footboard of bicycle does work can control and run through the work in turn, also can unilateral independent reciprocal work, simple structure, small, safe and reliable, the beginner is easy, applicable object is wide.

In order to achieve the above object, the utility model adopts the following technical scheme: a standing-sitting dual-purpose space-stepping bicycle comprises a front wheel, a rear wheel, a frame, a handlebar and a seat cushion, wherein the front wheel is movably assembled below the front end of the frame, and the rear wheel is movably assembled below the rear end of the frame; the handlebar is arranged above the front end of the frame, and the seat cushion is arranged above the middle of the frame; the bicycle frame also comprises two driving components which are symmetrical with each other and are arranged on two sides of the frame, wherein each driving component comprises a pedal, a chain, a first transmission chain wheel, a one-way silent ratchet wheel and a second return chain wheel; wherein the first transmission chain wheel is movably assembled at one side of the frame, the one-way silent ratchet wheel at the same side of the first transmission chain wheel is assembled on the wheel shaft of the rear wheel, the second return chain wheel at the same side of the first transmission chain wheel is movably assembled on the frame, and the second return chain wheel is provided with a second return spring for returning the second return chain wheel; wherein one end of the pedal on the same side with the first transmission chain wheel is hinged with one side of the middle part of the frame, the other end of the pedal is hinged with one end of the chain, and the other end of the chain sequentially passes through the first transmission chain wheel, the one-way silent ratchet wheel and the second return chain wheel on the same side and is fixed on the second return chain wheel; the pedal moves downwards in an arc line to pull the chain and drive the first transmission chain wheel, the one-way silent ratchet wheel and the second return chain wheel to rotate so as to drive the bicycle to slide forwards; and the second return chain wheel reversely rotates under the action of the second return spring and pulls the chain to be wound, and the chain drives the pedal to move upwards.

Furthermore, the frame comprises a main frame and an auxiliary frame fixed at the rear end of the main frame, the handlebar is arranged above the front end of the main frame, and the seat cushion is arranged above the middle of the main frame; the front wheels are movably assembled below the front end of the main frame, pedal main shafts are fixedly arranged on two sides of the middle position of the main frame, and one end of each pedal is sleeved on the pedal main shaft and rotates around the pedal main shaft; the first transmission chain wheel is movably assembled on two sides of the rear end of the main frame, the second return chain wheel and the rear wheel are movably assembled on the auxiliary frame, and the position of the first transmission chain wheel is higher than that of the pedal.

Further, wherein the rear end of the main frame is provided with an arc-shaped steel beam positioned above the rear wheel, the two sides of the arc-shaped steel beam are respectively provided with a first fixed shaft, a first transmission chain wheel is sleeved on the first fixed shaft and movably assembled with the main frame, a first return spring is mounted on the first transmission chain wheel, one end of the first return spring is connected with the first transmission chain wheel, and the other end of the first return spring is connected with the first fixed shaft.

Further, a second fixed shaft positioned below the one-way silent ratchet wheel is arranged on each of two sides of the auxiliary frame, a second return chain wheel is sleeved on the second fixed shaft and movably assembled with the auxiliary frame, one end of a second return spring is connected with the second return chain wheel, and the other end of the second return spring is connected with the second fixed shaft; wherein the rear wheel is movably assembled on the auxiliary frame through a one-way silent ratchet wheel.

Further, the inboard of the footboard keep away from the one end of footboard main shaft is provided with the chain fixed axle, and every chain fixed axle activity cup joints chain connecting device, wherein the one end and the chain connecting device fixed connection of chain, the other end of chain is in proper order around being located same one side first drive sprocket, one-way noiseless ratchet, second return sprocket to fix on second return sprocket.

Furthermore, the both sides of sub vehicle frame front end are provided with the buffering respectively and glue, and wherein the bottom surface of footboard stops on the surface that the buffering was glued when the footboard was made the arc motion downwards.

Further, the surface of footboard is provided with anti-skidding cushion.

Further, the surface of arc girder steel is provided with the handle.

Furthermore, each driving assembly also comprises a third transmission chain wheel, wherein the third transmission chain wheel is movably sleeved on the first fixed shaft and is fixedly connected with the first transmission chain wheel, and the diameter of the third transmission chain wheel is larger than that of the first transmission chain wheel; the chain includes one-level chain, second grade chain, the one end and the footboard one end of one-level chain are articulated, and the other end of one-level chain is fixed to be set up at first drive sprocket, the one end of second grade chain is fixed to be set up on third drive sprocket, and the other end of second grade chain walks around in proper order and lies in one-way silent ratchet and the second return sprocket with one side to with second return sprocket fixed connection.

The beneficial effects of the utility model reside in that:

1. the utility model provides a novel bicycle innovation adopts stand or sit the dual mode and ride, the footboard of the left and right sides is trampled from top to bottom respectively to two legs when riding, connect the one-way noiseless ratchet that drives the left and right sides through the chain and drive the bicycle and go forward, especially when riding of standing, the health can be upright naturally, more open than riding traditional bicycle field of vision, the head, positions such as neck shoulder and both hands are more relaxed naturally, do reciprocating motion from top to bottom alternately through the left and right sides footboard, 360 degrees circular motion more naturally also more laborsaving than traditional bicycle, novel bicycle can stand at any time when riding, sit the switching, even ride for a long time and also be tired easily.

2. Compared with the traditional bicycle, the left pedal and the right pedal are linked with each other, the left pedal and the right pedal of the novel bicycle do not interfere with each other independently when doing work, and can do work alternately and continuously from left to right or do work independently and reciprocally on one side. The pedal can be stepped to the bottom to do reciprocating work to a large extent, and can also be slightly stepped to do reciprocating work to a small extent. When the running resistance on the flat road is small, the feet can reliably tread forwards, the vehicle can run at high speed by using less working strokes, and the smooth switching can be freely selected.

Drawings

Fig. 1 is a front view of the bicycle of the present invention.

Fig. 2 is a schematic top view of the bicycle without the seat cushion of the present invention.

Fig. 3 is a schematic structural view of the operating principle of the bicycle driving assembly of the present invention.

Fig. 4 is a schematic structural view of the two-stage transmission of the bicycle of the present invention.

The reference numbers illustrate: 1. a handlebar; 2. a main frame; 3. a front wheel; 4. a pedal spindle; 5. a pedal; 51. a chain fixing shaft; 6. an anti-slip rubber pad; 7. a chain connecting device; 8. a chain; 81. a primary chain; 82. a secondary chain; 9. a first drive sprocket; 10. a first return spring; 11. a handle; 12. a brake device; 13. a one-way silent ratchet wheel; 14. a second return sprocket; 15. a second return spring; 16. buffer glue; 17. an auxiliary frame; 18. a seat cushion; 19. a rear wheel; 20. a first fixed shaft; 21. a second fixed shaft; 22. a unilateral bracket; 23. a third drive sprocket; 24. a chain fixing bolt; 211. an arc-shaped steel beam.

Detailed Description

Referring to fig. 1-4, the present invention relates to a dual-purpose space-time bicycle for standing and sitting, which comprises a front wheel 3(16 inch wheel), a rear wheel 19(18 inch wheel), a frame, a handlebar 1 and a seat cushion 18, wherein the front wheel 3 is movably assembled below the front end of the frame, and the rear wheel 19 is movably assembled below the rear end of the frame; the handlebar 1 is arranged above the front end of the frame, and the seat cushion 18 is arranged above the middle of the frame; the bicycle further comprises two driving assemblies which are symmetrical and arranged on the left side and the right side of the frame, and the two driving assemblies are identical in structure; each driving component comprises a pedal 5, a chain 8, a first transmission chain wheel 9, a one-way silent ratchet wheel 13 and a second return chain wheel 14; wherein, in the left driving component, the first transmission chain wheel 9 is movably assembled at the left side of the frame, the one-way silent ratchet wheel 13 at the left side is assembled on the wheel shaft of the rear wheel 19 and movably assembled on the frame with the second return chain wheel 14 at the left side, and the second return chain wheel 14 is provided with a second return spring 15 for returning the second return chain wheel 14; one end of the pedal 5 on the left side is hinged with the left side of the middle part of the frame, the other end of the pedal 5 is hinged with one end of the chain 8, and the other end of the chain 8 sequentially winds through the first transmission chain wheel 9 on the left side, the one-way silent ratchet wheel 13 and the second return chain wheel 14 and is fixed on the second return chain wheel 14 through the chain fixing bolt 24; the pedal 5 moves downwards in an arc, the traction chain 8 drives the first transmission chain wheel 9 to rotate anticlockwise, the one-way silent ratchet wheel 13 to rotate anticlockwise and the second return chain wheel 14 to rotate clockwise, and then the bicycle is driven to slide forwards; when the pedal 5 moves to the bottom dead center, the second return sprocket 14 rotates counterclockwise under the action of the second return spring 15, the traction chain 8 is wound, the one-way silent ratchet 13 rotates clockwise (at this time, the one-way silent ratchet 13 cannot drive the rear wheel 19 to rotate), the first transmission sprocket 9 rotates clockwise, and the chain 8 drives the pedal 5 to return to the top dead center. Since the unidirectional silent ratchet 13 is conventional prior art in the bicycle field, the structure of the unidirectional silent ratchet 13 will not be redundantly described in this application.

The utility model provides a novel bicycle innovation adopts stand or sit the dual mode and ride, the footboard 5 of the left and right sides is trampled from top to bottom respectively to two legs when riding, the one-way noiseless ratchet 13 that drives the left and right sides is connected through chain 8 drives the bicycle and gos forward, especially when riding of standing, the health can be upright naturally, more open than riding traditional bicycle field of vision, the head, positions such as neck shoulder and both hands are more relaxed naturally, do reciprocating motion from top to bottom through left and right sides footboard 5 in turn, 360 degrees circular motion more naturally also more laborsaving than traditional bicycle, novel bicycle can stand at any time when riding, sit the switching, even long-time also be difficult for tired.

Compared with the traditional bicycle in which the pedals 5 at the left side and the right side are linked with each other, the pedals 5 at the left side and the right side of the novel bicycle do not interfere with each other independently when doing work, and can do work alternately and continuously from left to right or do work independently and reciprocally on one side. The pedal can be stepped to the bottom to do reciprocating work to a large extent, and can also be slightly stepped to do reciprocating work to a small extent. When the running resistance on the flat road is small, the feet can reliably tread forwards, the vehicle can run at high speed by using less working strokes, and the smooth switching can be freely selected.

Referring to fig. 1-4, further, the frame includes a main frame 2, a sub-frame 17 fixed at the rear end of the main frame 2, the handlebar 1 is installed above the front end of the main frame 2, and the seat cushion 18 is installed above the middle of the main frame 2; the front wheel 3 is movably assembled below the front end of the main frame 2, pedal spindles 4 are fixedly arranged on two sides of the middle position of the main frame 2, and one end of a pedal 5 is sleeved on the pedal spindles 4 and rotates around the pedal spindles 4; and the first transmission chain wheel 9 is movably assembled at two sides of the rear end of the main frame 2, the second return chain wheel 14 and the rear wheel 19 are movably assembled on the auxiliary frame 17, and the position of the first transmission chain wheel 9 is higher than the top dead center position of the pedal 5. The main frame 17 and the auxiliary frame 17 are adopted to innovate appearance modeling, so that the appearance is attractive and streamline, the gravity center of the vehicle is lower, and the control and the balance are convenient. A unilateral bracket 22 is arranged at the lower end of one side of the auxiliary frame 17 and can be used for supporting the bicycle; and the sub-frame 17 is provided at both sides thereof with brake devices 12 for braking.

Further, the rear end of the main frame 2 is provided with an arc-shaped steel beam 211 located above the rear wheel 19, and the two sides of the arc-shaped steel beam 211 are provided with first fixing shafts 20, wherein the first transmission chain wheel 9 is sleeved on the first fixing shafts 20 and movably assembled with the main frame, and the first transmission chain wheel 9 is provided with a first return spring 10, wherein one end of the first return spring 10 is connected with the first transmission chain wheel 9, and the other end of the first return spring 10 is connected with the first fixing shafts 20. In order to better realize the rolling action of the chain 8, a first return spring 10 is also arranged on the first transmission chain wheel 9, wherein the pedal 5 moves downwards in an arc manner, the chain 8 is dragged and drives the first transmission chain wheel 9 to rotate anticlockwise (at the moment, the first return spring 10 is in a compression state), the one-way silent ratchet wheel 13 rotates anticlockwise, the second return chain wheel 14 (the second return spring 15 is in a compression state) rotates clockwise, and then the bicycle is driven to slide forwards; it can be seen that when the pedal 5 moves to the bottom dead center, the first transmission sprocket 9 rotates clockwise under the action of the first return spring 10, the second return sprocket 14 rotates counterclockwise under the action of the second return spring 15, and both the first return spring 10 and the second return spring 15 act on the traction chain 8 to wind, so that the winding speed of the chain 8 can be increased; and at the same time, the one-way silent ratchet 13 rotates clockwise (at this time, the one-way silent ratchet 13 does not drive the rear wheel 19 to rotate), the first transmission sprocket 9 rotates clockwise, and the chain 8 drives the pedal 5 to return to the top dead center.

Further, a second fixed shaft 21 located below the one-way silent ratchet 13 is arranged on each of two sides of the subframe 17, wherein a second return sprocket 14 is sleeved on the second fixed shaft 21 and movably assembled with the subframe 17, one end of a second return spring 15 is connected with the second return sprocket 14, and the other end of the second return spring 15 is connected with the second fixed shaft 21.

Further, the inner side of one end of the pedal 5, which is far away from the pedal spindle 4, is provided with a chain fixing shaft 51, and each chain fixing shaft 51 is movably sleeved with a chain connecting device 7, wherein one end of the chain 8 is fixedly connected with the chain connecting device 7, and the other end of the chain 8 sequentially winds through the first transmission chain wheel 9, the one-way silent ratchet wheel 13 and the second return chain wheel 14 which are located on the same side, and is fixed on the second return chain wheel 14 through the chain fixing bolt 24.

In the application, the stand-seat dual-purpose space stepping bicycle adopts a reciprocating stepping driving mode, when a pedal 5 is stepped downwards and backwards to do arc motion, a first transmission chain wheel 9 is driven to rotate by a connecting device traction chain 8, and the first transmission chain wheel 9 drives a one-way silent ratchet wheel 13 to rotate forwards, so that the bicycle is driven to slide forwards. When the pedal 5 moves to the bottom dead center, the second return chain wheel 14 drives the pedal 5 to return to the top dead center through the one-way silent ratchet wheel 13 and the first transmission chain wheel 9 (the first return spring 10 on the first transmission chain wheel 9 does work simultaneously) under the action of the second return spring 15, when the novel bicycle does work downwards, the pedal 5 pulls the stress point of the chain 8 and the first transmission chain wheel 9 to be at the optimal work angle basically in the whole process, while the traditional bicycle has an upper work dead center and a lower work dead center when doing treading in 360-degree circular motion, the optimal work stroke vertically downwards is shorter, so that 2/3 stroke of 360-degree circular motion is useless, and when doing circular motion, the legs and thighs are bent more greatly, so that fatigue is easier, and compared with the novel bicycle, the novel bicycle is more natural and labor-saving when doing reciprocating up and down.

Further, two sides of the front end of the auxiliary frame 17 are respectively provided with a buffer rubber 16, wherein the bottom surface of the pedal 5 abuts against the surface of the buffer rubber 16 when the pedal 5 moves downwards in an arc. Wherein in this application, when footboard 5 arc motion downwards to the back, 16 play buffering and spacing functions are glued in the buffering, can avoid footboard 5 and sub vehicle frame 17 to bump.

Further, the surface of the pedal 5 is provided with an anti-skid rubber mat 6. The user realizes the drive bicycle with the drive mode of reciprocating to trample and moves ahead, and the condition of skidding can effectively avoid appearing in antiskid cushion 6.

Further, the arc-shaped steel beam 211 is provided with a handle 11 on the surface. Because the unidirectional silent ratchet wheel 13 is used for reciprocating motion, the novel bicycle cannot normally slide backwards, and can only be gently lifted by using the handle 11 at the rear part of the frame when moving, and because the design of the bicycle is light, women and children can also easily finish the reciprocating motion, and the bicycle cannot cause serious troubles. If the triangular skid is used for supporting the vehicle at the bottom of the auxiliary frame 17, the vehicle can be used as a running machine indoors or in situ, and the body-building exercise at any time and any place is really realized.

As shown in fig. 4, each driving assembly further includes a third driving sprocket 23, wherein the third driving sprocket 23 is movably sleeved on the first fixed shaft 20 and is fixedly connected to the first driving sprocket 9, and the diameter of the third driving sprocket 23 is larger than that of the first driving sprocket 9; the chain 8 includes one-level chain 81, second grade chain 82, the one end of one-level chain 81 is articulated with footboard 5 one end, and the other end of one-level chain 81 passes through the fixed setting at first drive sprocket 9 of chain fixing bolt 24, the one end of second grade chain 82 passes through the fixed setting on third drive sprocket 23 of chain fixing bolt 24, and the other end of second grade chain 82 walks around in proper order and lies in one-way silent ratchet 13 and the second return sprocket 14 with one side to through chain fixing bolt 24 and second return sprocket 14 fixed connection. A third transmission chain wheel 23 with the diameter of 12cm is added on the side edge of the original first transmission chain wheel 9 and is coaxially fixed with the original first transmission chain wheel 9, then the chain is divided into two parts to form a primary chain 81 and a secondary chain 82, wherein the other end of the primary chain 81 is fixedly arranged on the first transmission chain wheel 9 through a chain fixing bolt 24, and the other end of the secondary chain 82 sequentially bypasses the one-way silent ratchet wheel 13 and the second return chain wheel 14 which are positioned on the same side and is fixedly connected with the second return chain wheel 14 through the chain fixing bolt 24; the purpose of secondary transmission is realized by a mode that the pedal 5 drives the first transmission chain wheel 9 and the second transmission chain wheel further drives the one-way silent ratchet wheel 13, and the vehicle speed can be improved by 50 percent by utilizing the secondary transmission under the condition of not changing other devices.

The above embodiments are only intended to describe the preferred embodiments of the present invention, but not to limit the scope of the present invention, and various modifications and improvements made by the technical solutions of the present invention by those skilled in the art are intended to fall within the protection scope defined by the claims of the present invention without departing from the design and spirit of the present invention.

Claims (9)

1. A standing-sitting dual-purpose space-stepping bicycle comprises a front wheel, a rear wheel, a frame, a handlebar and a seat cushion, wherein the front wheel is movably assembled below the front end of the frame, and the rear wheel is movably assembled below the rear end of the frame; the handlebar is arranged above the front end of the frame, and the seat cushion is arranged above the middle of the frame; the method is characterized in that: the bicycle frame also comprises two driving components which are symmetrical with each other and are arranged on two sides of the frame, wherein each driving component comprises a pedal, a chain, a first transmission chain wheel, a one-way silent ratchet wheel and a second return chain wheel; wherein the first transmission chain wheel is movably assembled at one side of the frame, the one-way silent ratchet wheel at the same side of the first transmission chain wheel is assembled on the wheel shaft of the rear wheel, the second return chain wheel at the same side of the first transmission chain wheel is movably assembled on the frame, and the second return chain wheel is provided with a second return spring for returning the second return chain wheel; wherein one end of the pedal on the same side with the first transmission chain wheel is hinged with one side of the middle part of the frame, the other end of the pedal is hinged with one end of the chain, and the other end of the chain sequentially passes through the first transmission chain wheel, the one-way silent ratchet wheel and the second return chain wheel on the same side and is fixed on the second return chain wheel; the pedal moves downwards in an arc line to pull the chain and drive the first transmission chain wheel, the one-way silent ratchet wheel and the second return chain wheel to rotate so as to drive the bicycle to slide forwards; and the second return chain wheel reversely rotates under the action of the second return spring and pulls the chain to be wound, and the chain drives the pedal to move upwards.

2. A dual-purpose space-stepping bicycle for standing and sitting as claimed in claim 1, wherein: the bicycle frame comprises a main bicycle frame and an auxiliary bicycle frame fixed at the rear end of the main bicycle frame, the handlebar is arranged above the front end of the main bicycle frame, and the seat cushion is arranged above the middle of the main bicycle frame; the front wheels are movably assembled below the front end of the main frame, pedal main shafts are fixedly arranged on two sides of the middle position of the main frame, and one end of each pedal is sleeved on the pedal main shaft and rotates around the pedal main shaft; the first transmission chain wheel is movably assembled on two sides of the rear end of the main frame, the second return chain wheel and the rear wheel are movably assembled on the auxiliary frame, and the position of the first transmission chain wheel is higher than that of the pedal.

3. A dual-purpose space-stepping bicycle for standing and sitting as claimed in claim 2, wherein: the rear end of the main frame is provided with an arc-shaped steel beam located above the rear wheel, first fixing shafts are arranged on two sides of the arc-shaped steel beam, a first transmission chain wheel is sleeved on the first fixing shafts and movably assembled with the main frame, a first return spring is mounted on the first transmission chain wheel, one end of the first return spring is connected with the first transmission chain wheel, and the other end of the first return spring is connected with the first fixing shafts.

4. A dual-purpose space-stepping bicycle for standing and sitting as claimed in claim 2, wherein: the two sides of the auxiliary frame are respectively provided with a second fixed shaft positioned below the one-way silent ratchet wheel, a second return chain wheel is sleeved on the second fixed shaft and movably assembled with the auxiliary frame, one end of a second return spring is connected with the second return chain wheel, and the other end of the second return spring is connected with the second fixed shaft; wherein the rear wheel is movably assembled on the auxiliary frame through a one-way silent ratchet wheel.

5. A dual-purpose space-stepping bicycle for standing and sitting as claimed in claim 2, wherein: the pedal is characterized in that a chain fixing shaft is arranged on the inner side of one end, away from the pedal spindle, of the pedal, and a chain connecting device is movably sleeved on each chain fixing shaft, wherein one end of each chain is fixedly connected with the chain connecting device, and the other end of each chain sequentially winds through a first transmission chain wheel, a one-way silent ratchet wheel and a second return chain wheel which are located on the same side, and is fixed on the second return chain wheel.

6. A dual-purpose space-stepping bicycle for standing and sitting as claimed in claim 2, wherein: the two sides of the front end of the auxiliary frame are respectively provided with buffer glue, and the bottom surface of the pedal abuts against the surface of the buffer glue when the pedal moves downwards in an arc.

7. A standing and sitting space-stepping bicycle according to claim 1, 2, 5 or 6, wherein: the surface of the pedal is provided with an anti-skid rubber mat.

8. A dual-purpose space-ridden bicycle for standing and sitting as claimed in claim 3, wherein: the surface of arc girder steel is provided with the handle.

9. A dual-purpose space-ridden bicycle for standing and sitting as claimed in claim 3, wherein: each driving component also comprises a third driving chain wheel, wherein the third driving chain wheel is movably sleeved on the first fixed shaft and is fixedly connected with the first driving chain wheel, and the diameter of the third driving chain wheel is larger than that of the first driving chain wheel; the chain includes one-level chain, second grade chain, the one end and the footboard one end of one-level chain are articulated, and the other end of one-level chain is fixed to be set up at first drive sprocket, the one end of second grade chain is fixed to be set up on third drive sprocket, and the other end of second grade chain walks around in proper order and lies in one-way silent ratchet and the second return sprocket with one side to with second return sprocket fixed connection.

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