TWI423898B - Pneumatic auxiliary dynamical system - Google Patents

Description

Pneumatic auxiliary power system

The present invention relates to a power system, and more particularly to a pneumatic auxiliary power system.

In recent years, bicycle leisure activities have become popular. Even in some countries, bicycles have been regarded as sparse and ordinary vehicles. Bicycles can be operated without fuel, and they are environmentally friendly and do not create pollution power tools. However, when the user is riding on an uphill road or riding at a long distance, using a bicycle as a means of transportation is a laborious and laborious task. Therefore, how to provide a power to assist the propulsion while maintaining the zero pollution of the bicycle is actually The current industry is eager to pursue the goal.

SUMMARY OF THE INVENTION One object of the present invention is to provide a pneumatic bicycle having a pneumatic auxiliary power system to provide auxiliary power and reduce the physical burden when riding a bicycle, while maintaining the characteristics of zero pollution of the bicycle.

According to the foregoing objective, the present invention provides a pneumatic auxiliary power system, comprising: a switching mechanism having a control member coupled to a control line; a braking portion triggered by the control member; The power conversion module is coupled to the braking portion. When the braking portion is triggered, the power conversion module can convert the mechanical kinetic energy of the wheel into a barometric energy; and a plenum is used for storing the The air pressure energy of the power conversion module; a gas pressure control unit having a control valve for controlling the gas in and out of the gas collection chamber; and a pneumatic motor that receives the gas from the gas collection chamber when the control valve is opened The air pressure energy is converted into mechanical power, which in turn causes the wheel to rotate.

The pneumatic bicycle with the pneumatic auxiliary power system of the invention can pass through the air motor The mechanical power generated during the bicycle is converted into the air pressure energy, and the stored air pressure can be released by the rider at any time to drive the air motor to assist the pedaling and reduce the physical burden of the bicycle. This makes it unnecessary for the commuters to ride bicycles to sweat, so that friends who love cycling can enjoy cycling all the time.

In the following, the preferred embodiments of the present invention are described in detail with reference to the accompanying drawings.

Referring to Figure 1, the applicability of the pneumatic bicycle with the pneumatic auxiliary power system of the present invention is briefly described below. When going downhill, the pneumatic bicycle of the present invention can convert the energy when going downhill to air pressure, and thereby increase the safety by slowing down the downhill speed. On the other hand, the rider can also cooperate with the pedaling when going downhill. Speed up the downhill while increasing intake efficiency. On the uphill, the rider can turn the collected air pressure into power at this time to reduce the force required to step on the slope. When riding on the ground, the rider can use the bicycle to control the system in the gas collection mode or the deflation mode. In the gas collection mode, the energy can be stored but the riding is more laborious. In the deflation mode, the stored pneumatic energy can be stored. Turn to power to reduce the physical burden of riding. In addition, when entering the gas gathering mode, it can be used as a preliminary brake due to internal resistance.

Please refer to FIG. 2 and FIG. 3, FIG. 2 is a perspective view showing the pneumatic bicycle 1 of the present invention having a pneumatic auxiliary power system, and FIG. 3 is a cross-sectional view showing the pneumatic bicycle 1 having the pneumatic auxiliary power system of the present invention. schematic diagram. As shown in FIGS. 2 and 3, the pneumatic bicycle 1 includes components commonly used in general bicycles such as the frame 12, the wheels 13, 14, the pedal crank 15, and the transmission structure 16. The user applies a force by the pedal crank 15 and transmits the belt through the transmission structure 16 The moving wheels 13, 14 rotate.

The pneumatic bicycle 1 having the pneumatic auxiliary power system of the present invention mainly comprises a plenum 20, a switching mechanism 30, a pneumatic control unit 40, a motor system 50, and such as a control line 81, an intake pipe 82, an air outlet pipe 83, and the like. Pipeline system. The switching mechanism 30 can be provided on the grip portion of a conventional bicycle, and a control member for a brake or a shifting system is generally provided thereon. The air pressure control unit 40 is configured to control the release of the air pressure energy in the air collection chamber 20. When the air pressure control unit 40 is in the open state, the gas pressure of the air collection chamber 20 can be transmitted to the motor system 50 through the air outlet tube 83. The motor system 50 then converts the pneumatic energy into power to assist the wheel 14 to rotate. The motor system 50 can convert the rotational kinetic energy of the wheel 14 into gas pressure and transmit it to the plenum 20 through the intake pipe 82 to store the gas energy. The motor system 50 is transmitted through the control member provided on the switching mechanism 30. Control line 81 is triggered. In addition, check valves 21 and 22 are provided at both ends of the plenum 20, and the check valve 21 only allows gas to enter the plenum 20 from the intake pipe 82, and the gas in the collecting pipe 20 does not flow to the intake pipe 82. The one-way valve 22 only allows gas to enter the air outlet pipe 83 from the plenum 20, thereby preventing the gas from flowing back into the plenum 20 from the air outlet pipe 83.

Please refer to FIG. 4 and FIG. 5, FIG. 4 is a combination diagram of a motor system 50 of a pneumatic bicycle 1 having a pneumatic auxiliary power system according to the present invention, and FIG. 5 is a view showing a pneumatic bicycle 1 having a pneumatic auxiliary power system according to the present invention. An exploded view of the motor system 50. The motor system 50 includes a brake portion 51, a center shaft 52, a braking portion 53, a power conversion module 55, a pneumatic motor 57, an oil groove 59, and an outer cover 54. The brake portion 51 includes a first brake pad 511 and a second brake pad 512, which are used as a function of the brake. The braking portion 53 includes a wear wheel 531, a friction gear 532, and a brake that converts the power of the wheel 14 into air pressure energy. The power conversion module 55 may be a gas collection pump for compressed air in the present invention, and the power conversion module 55 includes a set of reversing gears such as a first rotation gear 551, The second rotating gear 552, and the pumping piston 553. The air motor 57 is used to convert the pneumatic energy into mechanical power. The operation of the various components of the motor system 50 will be described in detail later.

Referring to Figure 6a, the switching mechanism 30 of the pneumatic bicycle 1 includes an oil groove 32, a handle 34, and a handle 36. The handle 34 is attached to the frame 12 of the bicycle 1, one end of the handle 36 is secured to the handlebar 34, and the other end is movable relative to the handlebar 34. When the force is applied to the handle 36, the oil pressure of the oil groove 32 is forced to rise, and the increased oil pressure can be transmitted by the oil-filled control line 81. However, the present invention is not limited to the oil pressure control, and may be implemented by other mechanical interlocking control methods.

The pneumatic bicycle 1 with the pneumatic auxiliary power system of the invention can be in the following modes: (1) inactive mode (2) gas collection mode (3) brake mode and (4) deflation mode, respectively, by reference The drawings are described.

(1) Inactive mode: Please refer to FIG. 5, FIG. 6a and FIG. 6b. When the handle 36 of the switching mechanism 30 is in a relaxed state without being biased, one end of the handle 36 is spaced from the handle 34 first. Distance S1, at which point the switching mechanism 30 is in the first control segment. At this time, the mechanical power of the wheels 13, 14 and the gas energy stored in the plenum 20 are not mutually converted, and the oil pressure in the oil groove 32 of the switching mechanism 30 and the oil groove 59 in the motor system 50 that is in communication is in a normal state, the motor The first brake pad 511 of the braking portion 51 in the system 50 is separated from the second brake pad 512, and the friction gear 532 of the braking portion 53 is also separated from the running wheel 531 without being interlocked, and the pumping piston 553 is relatively stationary, at which time the rider provides Power to the wheels 13, 14 is no different from a normal bicycle.

(2) Gas collection mode: Please refer to FIG. 5, FIG. 7a and FIG. 7b. When the handle 36 of the switching mechanism 30 is biased so that one end thereof is separated from the handle 34 by a second distance S2, the switching mechanism 30 will The second control segment is entered by the first control segment. At this time, the oil groove 32 of the switching mechanism 30 is pressurized to transmit the increased oil pressure to the oil groove 59 in the motor system 50 via the control line 81, and the elevated oil pressure will be increased. The friction gear 532 of the braking portion 53 is fitted to the running wheel 531. Since the running wheel 531 is transmitted through the center shaft 52 and rotates with the wheel 14, the rotation of the wheel 14 also causes the friction gear 532 to rotate. The friction gear 532 is designed in linkage with the first rotating gear 551 of the power conversion module 55. The rotation axis of the first rotating gear 551 is perpendicular to the rotation axis of the second rotating gear 552, and the second rotating gear 552 and the pumping piston 553 When the friction gear 532 is rotated, the first rotating gear 551 and the second rotating gear 552 can be used to change the power form, so that the pumping piston 553 reciprocates, thereby continuously compressing the gas and further passing through the intake pipe 82. The gas energy is stored in the plenum 20. In addition, as shown in FIG. 7b, in the air collection mode, the first brake pad 511 and the second brake pad 512 of the brake portion 51 are still separated, but the air collection mode will rotate a part of the wheel 14 Converted to barometric energy, the speed of the car is thus slowed down, so the gas collection mode can also be used as a preliminary brake.

(3) Brake mode: Please refer to FIG. 5, FIG. 8a and FIG. 8b. When the handle 36 of the switching mechanism 30 is continuously biased so that one end thereof is almost in contact with the handle 34 and is separated by the third distance S3, the switch is switched. The mechanism 30 will enter the third control segment from the second control segment. At this time, the oil pressure of the oil groove 32 of the switching mechanism 30 will rise again, and the oil pressure of the oil groove 59 in the motor system 50 will be higher than that in the gas collection mode, and the high oil pressure of the oil groove 59 will further cause the brake portion 51. The first brake pad 511 is in frictional contact with the second brake pad 512. Since the first brake pad 511 is interlocked with the wheel 14, when the first brake pad 511 rubs against the second brake pad 512, the rotation speed of the wheel 14 is lowered or even stopped.

(4) Deflating mode: Referring to FIG. 3, FIG. 4, and FIG. 5, the air pressure control unit 40 has a barometer (not shown) for indicating the current air pressure of the air collection chamber 20, and a control valve (not shown). When the air pressure control portion 40 is in the open state, the gas is released from the plenum 20, and the released gas pressure is supplied to the air motor 57 in the motor system 50 through the air outlet pipe 83, the air motor In turn, the gas energy is converted into mechanical power for the wheels 14 to rotate, and the energy stored in the plenum 20 can thus serve as an auxiliary source of power for the rotation of the wheels 14.

Please refer to FIG. 9a and FIG. 9b for further description of the specific operation of the power conversion module 55 of the pneumatic bicycle 1 with the pneumatic auxiliary power system of the present invention, and FIG. 9a shows the pneumatic bicycle 1 with the pneumatic auxiliary power system of the present invention. In the power conversion module 55, the pumping piston 553 is in an inhaled state, and FIG. 9b shows the pumping piston 553 in the power conversion module 55 of the pneumatic bicycle 1 having the pneumatic auxiliary power system of the present invention, which is in an inflated state. Schematic diagram. As shown in FIG. 5, FIG. 9a and FIG. 9b, the first rotating gear 551 rotates with the friction gear 532, and the first rotating gear 551 rotates the second rotating gear 552 when rotating, the first rotating gear 551 The rotational axis and the rotational axis of the second rotational gear 552 are perpendicular to each other. The pumping piston 553 has a rod 5532 and one end of the rod 5532 is pivotally connected to the piston portion 5534. The other end of the rod 5532 of the pumping piston 553 is offset from the central rotating shaft of the second rotating gear 552 and fixedly connected to the wheel of the second rotating gear 552. One point on face 5522. Therefore, when the second rotating gear 552 rotates, the rod 5532 is driven to reciprocate the piston portion 5534. As shown in Fig. 9a, when the piston portion 5534 of the pumping piston 553 is in an inhalation position, external air enters the chamber through the hole 5501. As shown in Fig. 9b, when the piston portion 5534 of the pumping piston 553 is in a pumping position, the air in the chamber is pushed into the intake pipe 82. The piston portion 5534 of the pumping piston 553 reciprocates between the suction position and the pumping position, and in this way continuously pushes air into the intake pipe 82, thereby compressing the air to the plenum 20 through the intake pipe 82. Inside, it is stored as pneumatic energy.

Please refer to Figure 6a, Figure 7a and Figure 8a, and further refer to Figure 10, Figure 11 and Figure 12, together with these drawings to further illustrate the pneumatic auxiliary powertrain of the present invention. The specific operation mode of the motor system 50' of the pneumatic bicycle 1 in the inactive mode, the intake mode and the brake mode, FIG. 10 shows the pneumatic bicycle 1 of the present invention having the pneumatic auxiliary power system, and the motor in the inactive mode Further detailed schematic diagram of system 50', FIG. 11 shows a further detailed schematic view of motor system 50' with pneumatic auxiliary power system of the present invention, motor system 50' in intake mode, and FIG. 12 shows pneumatic type of the present invention A further detailed schematic of the motor system 50' in the brake mode of the pneumatic bicycle 1 of the auxiliary power system.

First, the control line 81 is an oil-filled oil pipe and communicates to the oil groove 32 of the switching mechanism 30 and the oil groove 59 of the motor system 50'. The power conversion module 55 converts mechanical power into gas pressure that is compressed into the plenum 20 through the intake pipe 82. The brake portion 53 includes a wear wheel 531 and a friction gear 532 as a brake that converts the power of the wheel 14 (see FIGS. 2 and 3) into air pressure energy. The gas pressure of the plenum 20 can be transmitted to the air motor 57 through the air outlet pipe 83. The air motor 57 can convert the air pressure energy into mechanical power, thereby rotating the wheel 14. The brake portion 51' includes a first brake pad 511' and a second brake pad 512' for performing a brake function, which is an example of a hydraulic brake. In addition, the first central shaft 71 is interlocked with the wheel 14, the second central shaft 73 is disposed in the tube of the first central shaft 71, and is coupled with the friction gear 532 of the braking portion 53, and the spring 75 is used as the axial center of the second central shaft 73. Move against the buffer. Further, in the bracket system, the bracket 91 is fixed to a U-shaped chassis 92 by screws 93. In the quick release system having the shank 62 and the middle rod 64, the middle rod 64 can be passed through the second center shaft 73 and can be quickly removed by urging a rotation at the shank 62.

Referring to Figures 6a and 10, the pneumatic bicycle 1 is in the inactive mode, the switching mechanism 30 is in the first control section, the oil groove 32 of the switching mechanism 30 and the oil groove 59 in the communicating motor system 50', etc. The pressure is in a normal state, that is, the oil in the oil grooves 32, 59 is not forced to be pressed. at this time, The friction gear 532 of the braking portion 53 and the running wheel 531 are in a separated state, and the running wheel 531 is connected to the first center shaft 71 to rotate with the wheel 14 (see FIGS. 2 and 3), and the friction gear 532 is connected to The second central shaft 73 disposed in the tube of the first central shaft 71 is separated from the running wheel 531 by the friction gear 532, so the friction gear 532 does not rotate as the running wheel 531 rotates, and the power conversion module 55 does not perform energy. Conversion. Further, when in the inactive mode, the first brake pad 511' of the brake portion 51' in the motor system 50' is separated from the second brake pad 512'. The first brake pad 511' is coupled to the first center shaft 71. As the wheel 14 rotates, the first brake pad 511' is disposed between the two second brake pads 512', and the second brake pad 512' is received by the oil groove 59. The oil pressure control, the two second brake pads 512' will approach each other due to the increase in the oil pressure of the oil groove 59. As shown in Fig. 10, when in the inactive mode, the first brake pad 511' is separated from the second brake pad 512' without rubbing against each other, and thus does not affect the rotation of the wheel 14.

Referring to Figures 7a and 11, when the switching mechanism 30 enters the second control section from the first control section, the oil sump 32 of the switching mechanism 30 will be pressurized to transfer the elevated oil pressure to the motor system via the control line 81. The oil groove 59 in 50', when the switching mechanism 30 is in the second control section, the pneumatic bicycle 1 enters the intake mode. In this mode, the increased oil pressure in the oil groove 59 causes the friction gear 532 of the braking portion 53 to be engaged with the grinding wheel 531. As described above, the running wheel 531 is coupled to the first center shaft 71 with the wheel 14 (See FIGS. 2 and 3) The friction gear 532 is coupled to the second center shaft 73 disposed in the tube of the first center shaft 71, so that when the friction gear 532 is engaged with the running wheel 531, the wheel 14 rotates. The friction gear 532 is also driven to rotate. Therefore, when the friction gear 532 of the braking portion 53 rotates, the power conversion module 55 is caused to perform power conversion, thereby converting the mechanical energy of the rotation of the wheel 14 into air pressure energy, and storing it in the plenum through the air inlet pipe 82. 20 inside. In addition, when the oil pressure of the oil groove 59 is increased, the second center shaft 73 will be urged toward the wheel 14 side. Moving, the second central shaft 73 is abutted against the spring 75 at one end of the wheel 14, so as to be abutted against the elastic force of the spring 75, and the friction gear 532 and the running wheel 531 can be restored to the unfitted state. Smooth. In addition, as shown in FIG. 11, in the air collection mode, the first brake pad 511' and the second brake pad 512' of the brake portion 51' are still separated, but the first brake pad 511' and the second brake pad The distance of 512' will be driven by the pressure of the oil pressure of the oil groove 32. The distance is closer than that in the inactive mode, but the first brake pad 511' and the second brake pad 512' are still not. Rubbing against each other does not affect the rotation of the wheel 14.

Referring to FIGS. 8a and 12, when the switching mechanism 30 enters the third control section from the second control section, the oil groove 32 of the switching mechanism 30 will be pressed again and will be further raised by a hydraulic pressure, which is transmitted to the control line 81 to The oil groove 59 in the motor system 50' enters the brake mode when the switching mechanism 30 is in the third control section. At this time, the oil pressure of the oil groove 59 in the motor system 50' will be higher than that in the gas collection mode, and the high oil pressure of the oil groove 59 will further cause the first brake piece 511' of the brake portion 51' and the two second brake pads 512. 'Contact friction, since the first brake pad 511' is coupled to the first center shaft 71 and rotates with the wheel 14 (see FIGS. 2 and 3), the first brake pad 511' is placed on the two second brake pads 512. Between, so when the first brake pad 511' is in frictional contact with the two second brake pads 512', the rotational speed of the wheel 14 will thus be lowered or even stopped.

In addition, in the deflation mode, the pneumatic bicycle 1 is released from the plenum 20 and passes through the air outlet pipe 83, and the released gas pressure is supplied to the air motor 57 in the motor system 50', and the air motor 57 will gas. The energy is converted into mechanical power and the mechanical power is transmitted to the wheels 14 by the first central shaft 71 (see Figures 2 and 3) for the wheels 14 to rotate. Thereby, the energy stored in the plenum 20 can serve as an auxiliary power source for the rotation of the wheel 14.

In summary, although the present invention has been disclosed above with preferred embodiments, it is not intended to be limiting. The present invention is intended to be able to be varied and modified, and the scope of the present invention is defined by the scope of the appended claims, without departing from the spirit and scope of the invention. Subject to it.

1‧‧‧ pneumatic bicycle

12‧‧‧ frame

13‧‧‧ Wheels

14‧‧‧ Wheels

15‧‧‧ pedal crank

16‧‧‧Transmission structure

20‧‧‧gas collection room

21‧‧‧ check valve

22‧‧‧ check valve

30‧‧‧Switching mechanism

32‧‧‧ oil tank

34‧‧‧handle

36‧‧‧handle

40‧‧‧Pneumatic Control Department

50‧‧‧Motor system

50’‧‧·Motor system

51‧‧‧ brakes

51’‧‧· brakes

52‧‧‧Axis

53‧‧‧Brake

54‧‧‧ Cover

55‧‧‧Power Conversion Module

57‧‧‧Air motor

59‧‧‧ oil tank

62‧‧‧ handle

64‧‧‧中杆

71‧‧‧First central axis

73‧‧‧Second central axis

75‧‧‧ Spring

81‧‧‧Control line

82‧‧‧Intake pipe

83‧‧‧Exhaust pipe

91‧‧‧ bracket

92‧‧‧U-shaped chassis

93‧‧‧ screws

511‧‧‧First brake pads

512‧‧‧second brake pads

511’‧‧‧First brake pads

512’‧‧‧second brake pads

531‧‧‧Running wheel

532‧‧‧Friction gear

551‧‧‧First rotating gear

552‧‧‧Second rotating gear

553‧‧‧Air piston

5501‧‧‧ hole

5522‧‧‧90

5532‧‧‧ rod

5534‧‧‧Piston Department

S1‧‧‧ first distance

S2‧‧‧Second distance

S3‧‧‧ third distance

Figure 1 is a schematic view showing the application of the pneumatic bicycle of the present invention having a pneumatic auxiliary power system.

Figure 2 is a perspective view showing the pneumatic bicycle of the present invention having a pneumatic auxiliary power system.

Figure 3 is a cross-sectional view showing the pneumatic bicycle of the present invention having a pneumatic auxiliary power system.

Figure 4 is a combination view showing the motor system of the pneumatic bicycle of the present invention having a pneumatic auxiliary power system.

Figure 5 is an exploded view of the motor system of the pneumatic bicycle of the present invention having a pneumatic auxiliary power system.

Fig. 6a is a schematic view showing the switching mechanism of the pneumatic bicycle with the pneumatic auxiliary power system of the present invention in the inactive mode when the switching mechanism is in the first control section.

Fig. 6b is a schematic view showing the motor system of the pneumatic bicycle with the pneumatic auxiliary power system in the inactive mode.

Fig. 7a is a schematic view showing the switching mechanism of the pneumatic bicycle with the pneumatic auxiliary power system in the intake mode of the present invention in the second control section.

Fig. 7b is a schematic view showing the motor system of the pneumatic bicycle with the pneumatic auxiliary power system in the intake mode.

Fig. 8a is a schematic view showing the switching mechanism of the pneumatic bicycle with the pneumatic auxiliary power system in the braking mode of the present invention in the third control section.

Figure 8b is a schematic view showing the motor system of the pneumatic bicycle with the pneumatic auxiliary power system in the braking mode of the present invention.

Fig. 9a is a schematic view showing the pumping piston in an inhalation state in the power conversion module of the pneumatic bicycle with the pneumatic auxiliary power system of the present invention.

Fig. 9b is a schematic view showing the pumping piston in an air-powered state in the power conversion module of the pneumatic bicycle with the pneumatic auxiliary power system of the present invention.

Figure 10 shows a further detailed schematic diagram of the motor system of the pneumatic bicycle with the pneumatic auxiliary power system in the inactive mode of the present invention.

Figure 11 is a detailed diagram showing the motor system of the pneumatic bicycle with the pneumatic auxiliary power system in the intake mode.

Fig. 12 is a detailed diagram showing the motor system of the pneumatic bicycle with the pneumatic auxiliary power system in the braking mode of the present invention.

1‧‧‧ pneumatic bicycle

12‧‧‧ frame

13‧‧‧ Wheels

14‧‧‧ Wheels

15‧‧‧ pedal crank

16‧‧‧Transmission structure

20‧‧‧gas collection room

21‧‧‧ check valve

22‧‧‧ check valve

30‧‧‧Switching mechanism

40‧‧‧Pneumatic Control Department

50‧‧‧Motor system

81‧‧‧Control line

82‧‧‧Intake pipe

83‧‧‧Exhaust pipe

Claims (10)

A pneumatic auxiliary power system includes: a switching mechanism having a control member connected to a control line; a braking portion triggered by the control member; and a power conversion module Coupled to the braking portion, the power conversion module can convert the mechanical kinetic energy of the wheel into a barometric energy when the braking portion is triggered; and a plenum for storing the air pressure energy from the power conversion module a pneumatic control unit having a control valve for controlling the ingress and egress of gas in the plenum; and a pneumatic motor that receives the pressure energy from the plenum when the control valve is opened, and The pneumatic energy is converted into mechanical power, which in turn causes the wheel to rotate. The pneumatic auxiliary power system of claim 1, wherein the switching mechanism comprises an oil groove, a handle and a handle, the handle is fixed on the handle at one end, and the other end is movable relative to the handle. The control line is an oil pipe, and the oil groove is in communication with the oil pipe. When a user applies a force to the handle, the oil pressure of the oil groove is increased, and the increased oil pressure is transmitted through the oil pipe, and further The brake is controlled. The pneumatic auxiliary power system of claim 1, wherein the braking portion comprises a friction gear and a running wheel, the friction gear is coupled to the power conversion module, and the running wheel train is interlocked with the wheel. The control member of the switching mechanism controls the friction gear and the wear wheel to be changed in a fitting state and an unfit state. When the friction gear and the running wheel are in the fitting state, the friction The gear can rotate with the wheel, and at the same time, the power conversion module converts the mechanical kinetic energy of the wheel into air pressure energy. The pneumatic auxiliary power system of claim 3, wherein the running wheel train is coupled to and coupled to a first central shaft, and the friction gear is coupled to a tube disposed in the tube of the first central shaft. The second central shaft, when the friction gear and the running wheel are in the fitting state, the rotation of the wheel can drive the friction gear to rotate by the first central shaft and the running wheel connected thereto. The pneumatic auxiliary power system of claim 4, wherein the second central shaft abuts a spring disposed in the tube of the first central shaft near one end of the wheel, and utilizes the elasticity of the spring Force as a buffer against. The pneumatic auxiliary power system of claim 1, wherein the power conversion module comprises a first rotating gear, a second rotating gear and an airing piston, the first rotating gear and the second rotating gear. Having a mutually perpendicular axis of rotation, the pumping piston is coupled to the second rotating gear, and when the braking portion is triggered, the first rotating gear drives the second rotating gear, and the rotation of the second rotating gear The pumping piston is caused to reciprocate. The pneumatic auxiliary power system of claim 6, wherein the pumping piston has a rod and a piston portion pivotally connected to one end of the rod, the other end of the rod being offset from the second rotating gear a central pivot, fixedly connected to a point on the wheel surface of the second rotating gear, the piston portion is disposed in a cavity having a first hole communicating with the outside and a second hole and the plenum When the second rotating gear rotates, the piston portion is driven to reciprocate at an inhaling position and an inhaling position to continuously push and compress the external air to the plenum. The pneumatic auxiliary power system of claim 1, further comprising a brake portion, the brake portion comprising a first brake pad and a second brake pad, the first brake pad being interlocked with the wheel The distance between the first brake pad and the second brake pad is controlled by the control member of the switching mechanism. When the first brake pad is in friction with the second brake pad, the rotation speed of the wheel is reduced. The pneumatic auxiliary power system of claim 1, wherein the control member of the switching mechanism has three control segments, and when it is in a first control segment, the braking portion is in an untriggered state and The power conversion module is in an idle state. When it is in a second control segment, the braking portion is in a trigger state and the power conversion module performs mechanical kinetic energy and air pressure energy conversion when it is in a third control segment. The pneumatic bicycle enters a braking mode. The pneumatic auxiliary power system of claim 1, wherein the plenum is provided with at least one check valve to allow the gas to flow in a fixed direction.