TWI822449B - Pedaled speed bicycle - Google Patents

Abstract

A pedal-type variable-speed bicycle mainly includes: two one-way flywheels, one on the left and one on the left on the central axis on both sides of the rear wheel; a pedaling mechanism with two pedal rods, one on the left and one on the left, on both sides of the frame; a power A cable is wound between the two step levers and the two one-way flywheels, and a manual shifter is arranged on the frame to pull the gearbox provided on the two step levers that are engaged with each other via a gear pipeline; thereby By pedaling up and down, the pedaling mechanism can drive the power cable to move back and forth, causing the two one-way flywheels to drive the rear wheel to rotate, providing forward power for the bicycle. During pedaling, the manual shifter can be used to switch and adjust the gear line. Pull the gearbox on the two pedal rods that are meshed together, and change its front and rear positions to produce relatively different speed shifting effects.

Description

Pedaled speed bicycle

The present invention relates to the technical field of bicycles, in particular to a pedal-type variable speed bicycle.

The world's first bicycle was made by the Frenchman Sibrac in 1790. The original design had no steering device and could not turn, and it had to rely on the person's two feet to step on the ground alternately to provide power when moving forward. It is neither comfortable nor able to move forward quickly when riding. It is an entertainment device only used by a few people and cannot meet the actual needs of daily transportation as a means of transportation. As the times progress, bicycles continue to develop and improve, and their structures and functions have become more perfect, and various different types of bicycles have been derived.

However, the fly in the ointment is that the transmission devices of existing traditional bicycles have defects: they use gears and chains to transfer the kinetic energy of the crank to the tires. One problem is that the torque conversion efficiency is not high. When the existing bicycle is riding, when the crank is horizontal When the pedal is in this state, the force exerted by a person on the pedals can cause the chainring to output the maximum torque; after the crank crosses the horizontal state, and the pedals are stepped on with the same force, the torque output by the chainring is less than the maximum value when the crank is horizontal; when the crank is vertical , the force direction of the pedals overlaps with the center of the central axis. When the pedals are pressed hard, the gear plate has no torque output. Therefore, the existing transmission device cannot convert the vertical pedaling force into rotational torque to the maximum extent.

The second problem is insufficient driving force. Existing bicycles are ridden in a sitting position. The bicycle seat carries the main weight of the human body. The driving force of the bicycle mainly relies on the contraction of human thigh muscles to generate power. The toothed disc is output only when the human thigh pedals hard. In a torque-driven bicycle, when a person's thighs are not exerting force, the gears The disc also has no torque output, and the gravitational potential energy of the human body does not produce corresponding driving torque, so the torque to drive the bicycle is not large enough.

Therefore, many people are now beginning to study pedal-type bicycles, hoping to effectively convert the power of pedaling up and down into the power of the bicycle to move forward. However, the structural design of the conventional pedal-type bicycles has not yet been perfected, and the conversion efficiency of pedaling force is still low. It also has the problem of uncoordinated pedaling and does not have the function of shifting gears, which are its main shortcomings.

In view of this, the main purpose of the present invention is to provide a pedal-type variable speed bicycle, which mainly includes: a frame, a front wheel, a rear wheel, a seat, and a handlebar. It is characterized by: two one-way flywheels, one on the left and one on the rear. On the central axle on both sides of the wheel; a pedaling mechanism has two pedal rods, one on the left and one pivoted on both sides of the frame, and the front end of each pedal rod has a pedal part corresponding to the bottom of the vehicle seat for pedaling; A power cable is wound between the two pedal rods and the two one-way flywheels, and is driven by the pedal mechanism to move back and forth, so that the two one-way flywheels drive the rear wheels to rotate to provide forward power for the bicycle, and; a manual shifter , which is provided on the frame to provide switching adjustment. The transmission line is used to pull the gearbox that is engaged with the two pedal rods, and changes its front and rear positions to produce different speed changes.

In a preferred implementation, the vehicle frame further has two rear fork bars, the upper sections of which are each provided with a pulley on the left and right, and the vehicle seat further has a middle bar under which a reversing pulley is provided at the rear and lower part; the power cable further has two sections of chains and It consists of three sections of steel cables connected at intervals. The two sections of the chain are respectively embedded with the two one-way flywheels, and the middle section of the steel cable is bypassed and connected to the reversing pulley. The left and right sections of the steel cable are suspended through the two pulleys respectively. It is connected to the middle sections of the left and right step bars, but the actual structure is not limited to this.

In a preferred implementation, the frame is provided with a limit bar below the two corresponding step rods, and a rotating fulcrum is provided behind each step rod to lock the rear fork rod on the corresponding side of the frame. At the lower position, there is also a return cable connected to the front of the middle section of the two pedal poles, which is wound around the two return pulleys on the middle pole so that the left and right pedals can be stepped up and down, but the actual structure is not like this. is limited.

In a preferred implementation, the transmission is further composed of a sliding gear plate seat on each step lever; the manual shifter is further provided on the cross bar of the frame, and the manual shifter is provided with left and right gears. An operating lever is sandwiched between a series of pivots in the middle of the base, and a handle is provided above the operating lever, but the actual structure is not limited to this.

Compared with the existing conventional structure, the advantage of the pedal-type variable-speed bicycle of the present invention is that the pedal mechanism can be stepped up and down to drive the power cable to move back and forth, so that the two one-way flywheels drive the rear wheel to rotate and provide the forward power of the bicycle. At the same time, during pedaling, the manual shifter can be used to switch and adjust, and the gear line is used to pull the gearbox that is engaged on the two pedal rods, and change its front and rear positions to produce different speed shifting effects. The overall structure is streamlined and effective, with large moment arms, no idle travel in the transmission, adjustable speed, and ergonomic pedaling movements that are more coordinated, thereby improving riding comfort.

1: Pedal type variable speed bicycle

10: Frame

101:Rear fork rod

103:Middle shot

11:Front wheel

12:Rear wheel

121:Limiting bar

13:Car seat

14: handlebar

15: One-way flywheel

20: Trampling mechanism

21: step pole

210: Rotating fulcrum

211: Guide rail tooth plate

22: Stampede Department

25:Transmission

250: Sliding tooth plate seat

251:Inner steel cable

252: Coil spring

253:Suspension pull hole

30:Power cable

31: Steel rope

311:Pulley

313:Reversing pulley

33: Steel rope

35:Chain

351:Adjustment screw

40:Manual shifter

41: Gear pipeline

410:Pedestal

411: Gear wheel

412: Buffer spring

413:Pipeline connection hole

42: Operating lever

421:Grip

44: Top support spring

440:Bail column

45:Escapement

451:Reverse chuck handle

452:Protruding card part

453: Forward chuck handle

454: Open claw at the top

46: Positioning ratchet bar

50:Return to the tightrope

513:Return pulley

Figure 1 is an assembled plan view of a pedal-type variable speed bicycle according to the present invention.

Figure 2 is a schematic diagram of the configuration of the pedaling mechanism and the power cable of the present invention.

Figure 3A is a schematic diagram of a transmission mounted on the step lever of the present invention.

Figure 3B is a cross-sectional view of the transmission A-A' provided on the step lever of the present invention.

Figure 4A is a cross-sectional view of the manual shifter A-A’ of the present invention.

Figure 4B is a cross-sectional view of the manual shifter B-B' of the present invention.

Figure 5 is a schematic diagram of the manual shifter connected to the pedal transmission according to the present invention.

In order to facilitate understanding of the content of the present invention and the effects that can be achieved, specific embodiments are listed in conjunction with the drawings, and the detailed description is as follows: Please refer to Figures 1 to 5, a pedal-type variable speed bicycle 1 according to the present invention, It mainly includes: a frame 10, a front wheel 11, a rear wheel 12, a seat 13, and a handlebar 14. It is characterized by: two one-way flywheels 15, one on the left and one on the central axis on both sides of the rear wheel 12; a pedaling mechanism 20 , there are two pedal rods 21 on the left and right, each pivoted on both sides of the vehicle frame 10. The front end of each pedal rod 21 has a pedal portion 22 corresponding to the bottom of the vehicle seat 13 for pedaling; a power cable 30 , is arranged between the two pedal rods 21 and the two one-way flywheels 15, and is driven by the pedal mechanism 20 to move back and forth, so that the two one-way flywheels 15 drive the rear wheel 12 to rotate to provide forward power for the bicycle, and; one-hand gear shifting The device 40 is provided on the frame 10 to provide switching adjustment. The transmission line 41 pulls the transmission 25 that is engaged on the two pedal rods 21, and changes its front and rear positions to produce different speed changes.

In a preferred implementation, as shown in Figures 1 and 2, the vehicle frame 10 further has two rear fork bars 101, each of which has a pulley 311 on the left and right sections of the upper section, and the vehicle seat 13 further has a middle bar 103 underneath, with a middle bar 103 at the rear and lower part. Reversing pulley 313; the power cable 30 is further composed of two sections of chain 35 and three sections of steel cables 31 and 33 connected at intervals, wherein the two sections of chain 35 are respectively engaged with the two one-way flywheels 15, and the two sections of chain 35 and the middle section of the steel cable 33 are each provided with an adjustment screw 351, and the middle section of the steel cable 33 is connected to the reversing pulley 313, and the left and right sections of the steel cable 31 are suspended through the two pulleys 311 and respectively connected to the middle sections of the left and right step rods 21. connection, but the actual structure is not limited to this.

In a preferred implementation, the frame 10 is provided with a limiting bar 121 below the two corresponding step rods 21 , and a rotating fulcrum 210 is provided behind each step rod 21 to lock the corresponding position of the frame 10 . Side rear forks 101, in addition, a return cable 50 is connected to the front of the middle section of the two step rods 21 to span the two return pulleys 513 provided on the middle rod 103, but the actual structure is not limited to this.

The key point of the above structural design is that the return cable 50 must always be kept tight, so that the two pedal rods 21 can move up and down repeatedly when pedaling left and right. The power cable 30 must be looser than the return cable 50 so that the sliding tooth plate seat 250 can slide on the guide rail tooth plate 211. If the power cable 30 is pulled too tight, the left and right pedals will The teeth on the pedal 21 are all in an interlocking shape, and if they are too loose, the teeth of the pedal rod 21 on the force side will bite to create a force gap. At this time, the adjustment screws 351 on both sides can be used to keep the power cable 30 At the best tightness to maintain the normal operation of the two pedal rods 21.

In a preferred implementation, as shown in FIGS. 3A to 5 , the transmission 25 is further composed of a sliding gear plate seat 250 provided on each step lever 21 ; the manual shifter 40 is further provided on the frame 10 On the crossbar, the manual shifter 40 is provided with an operating lever 42 sandwiched between left and right bases 410 and pivoted in the middle. A handle 421 is provided above the operating lever 42, but the actual structure is not limited to this.

In a preferred implementation, the operating lever 42 further has an escapement 45 supporting the spring 44 below, and a corresponding positioning ratchet bar 46 is provided at the inner bottom of the manual shifter 40; on the two bases 410 Each gear roller 411 is provided with a gear roller 411, and a gear pipeline 41 is wound around each gear roller 411, one end of which is fixed to the side of the manual gear shifter 40 through a buffer spring 412, and the other end is connected to the manual gear shifter 41. The pipeline connection hole 413 of 40 is pulled out to connect to the transmission 25 correspondingly provided on the step lever 21 on the same side, but the actual structure is not limited to this.

In a preferred implementation, the step rod 21 is further provided with a guide rail tooth plate 211, which is movably connected to the sliding tooth plate seat 250. When assembled, the guide rail tooth plate 211 is located between the sliding tooth plate seat 250. On the top, the peaks and valleys of the two teeth are relatively symmetrical, and there is an appropriate distance between the upper and lower teeth of the two, so that the sliding tooth plate seat 250 can still slide without being stepped on. One end of the sliding tooth plate seat 250 is connected to the The gear pipeline 41 is connected and pulled, and the other end is connected to the coil spring 252 on the step rod 21 through an inner steel cable 251 to fix it, and the sliding The tooth plate base 250 is provided with a suspension pull hole 253 for the end of the power cable 30 to connect and pull. The tooth sizes of the sliding tooth plate base 250 and the guide tooth plate 211 can be set in equal proportions, but the actual structure is not Not limited to this.

In a preferred implementation, the escapement mechanism 45 further includes a reverse lever 451 provided diagonally on one side below the operating lever 42, and a convex portion 452 on the other side, corresponding to a forward lever 453, which is V-shaped and has a rear pivot. It is provided on the base 410. When assembled, the backward clamping handle 451 and the forward clamping handle 453 move on the positioning ratchet bar 46 at intervals, and the upper part of the forward clamping handle 453 opens outside the pawl 454 and is supported by the top. The spring 44 is pressed against the first gear column 440 of the manual shifter 40. During implementation, the tooth sizes of the positioning ratchet rack 46 and the sliding tooth plate seat 250 can be the same or different in equal proportions, for example 1: 2But the actual structure is not limited to this.

When used, please refer to Figures 1 and 2. When the user alternately steps up and down with both feet, the pedals 21 on both sides will also alternately move up and down, causing the two sides of the power cable 30 to alternately pull. . During the process, the chain segments 35 on both sides are simultaneously driven to drive the corresponding one-way flywheels 15 on both sides to rotate accordingly. When the step rod 21 on one side moves downward, the step rod 21 on the other side moves upward. At this time, the one-way flywheel 15 on one side rotates in the forward direction, while the one-way flywheel 15 on the other side rotates in the reverse direction. However, since the two one-way flywheels 15 can be driven in one direction and freely rotated on the rotating shaft, Therefore, when the one-way flywheel 15 rotates forward, it can drive the rear wheel 12 to rotate, and when the one-way flywheel 15 rotates reversely, the one-way flywheel 15 will not affect the forward movement of the rear wheel 12 . In this way, the effective design enables the rear wheel 12 of the bicycle to be driven forward by stepping up and down on the pedal parts 22 on both sides. During the riding process, the force acting on the pedal parts 22 and the transmission force arm can always be kept perpendicular, and the action method is consistent with the movement of our thighs. The muscle power characteristics are consistent, which can relieve leg muscle soreness during long-term riding, making us more relaxed during riding, thereby improving the rider's overall efficiency in doing work on the bicycle.

Please refer to Figures 3A to 5. When you need to change gears while riding, you can switch and adjust the gears through the manual shifter 40. Pull the handle 421 to push the operating lever 42 forward, because the direction is along the gear. The bottom escapement 45 can move forward on the corresponding positioning ratchet rack 46 without any hindrance, causing the gear lines 41 on both sides to pull the two transmissions 25 on the two side step bars 21 to move backward, changing the relationship between the sliding tooth plate seat 250 and the The position where the guide rail tooth plate 211 on the step rod 21 is connected allows the corresponding suspension pull hole 253 to move backward, which directly causes the pulling position of the step rod 21 and the power cable 30 to move backward, and the torque changes accordingly, so that the pedaling vehicle moves forward. The speed can be relatively slow.

More specifically, the gear line 41 is always kept in a tight state through the coil spring 252 , and the elastic force of the buffer spring 412 is greater than that of the coil spring 252 . When changing gears, by operating the manual shifter 40, the gear lines 41 can be retracted or released relative to each other, thereby causing the sliding gear plate seat 250 to shift. For example, when climbing a hill and requiring a large force distance, push the operating lever 42 forward. Since the sliding tooth plate seat 250 of the pedal rod 21 is not engaged and is in a free sliding state, it can directly move the speed change first. The sliding tooth plate seat 250 of the pedal lever 21 on the other side is engaged with the guide rail tooth plate 211, which will prevent the gear line 41 from being pulled back. At this time, the operating lever 42 can be moved by opening the buffer spring 412. Push forward smoothly, and when the force pedal 21 is restored to the position where the two teeth are not engaged, the recovery of the buffer spring 412 will act to pull the sliding tooth plate seat 250 to the desired shifting position.

On the contrary, when the handle 421 is pulled back to pull the operating lever 42 back, the escapement 45 underneath it can play the role of gradually shifting back due to the reverse gearing, and the upward rotation of the protruding portion 452 will cause the V-shaped forward movement to be blocked. The handle 453 is raised and loses the blocking effect. At the same time, the backward clamping handle 451 will press backward on the positioning ratchet bar 46 to produce a retreat blocking effect, so that the V-shaped forward clamping handle 453 will pre-retract half a tooth, and the operating lever 42 will be pulled back. When the reverse lever 451 is disengaged, and the V-shaped forward lever 453 is in position, the function of one-tooth locking of the rear gear is instantly completed, and the two side pedal levers 21 are pulled by the gear pipelines 41 on both sides. The upper two transmissions 25 can move forward to make the pedaling speed faster.

More specifically, when the operating lever 42 is pulled back, the sliding gear seat 250 with two teeth on one side that are not meshed can move immediately, while the gear line 41 with two teeth on the other side that are meshed will be slightly relaxed in the manual shifter 40 , but will not derail from the gear roller 411. Similarly, when the two teeth of the step lever 21 are released, the coil spring 252 will be tightened to pull and shift the sliding tooth plate seat 250. Change the connecting position of the sliding tooth plate seat 250 and the guide rail tooth plate 211 on the step rod 21, so that the corresponding suspension hole 253 moves forward, thereby indirectly moving the pulling position of the step rod 21 and the power cable 30 forward. The torque changes accordingly, so that the pedaling speed can be relatively faster.

Compared with the existing conventional structure, the advantage of the pedal-type variable speed bicycle 1 of the present invention is that the pedal mechanism 20 can be stepped up and down to drive the power cable 30 to move back and forth, so that the two one-way flywheels 15 drive the rear wheel 12 to rotate. It provides the forward momentum of the bicycle. At the same time, the manual shifter 40 can be used to switch and adjust during pedaling. The transmission line 41 pulls the gearbox 25 that is engaged with the two pedal rods 21 to change its front and rear positions to produce relative differences. Fast and slow speed changing effect. The overall structure is streamlined and effective, with large moment arms, no idle travel in the transmission, adjustable speed, and ergonomic pedaling movements that are more coordinated, thereby improving riding comfort.

To sum up, the invention is novel and practical and fully meets the patent requirements, and an invention patent application is filed. However, the above are only preferred embodiments of the present invention, and should not be used to limit the scope of the present invention; therefore, all equivalent changes and modifications made based on the patent scope of the present invention and the content of the creation specification shall be It is within the scope covered by the patent of this invention.

1: Pedal type variable speed bicycle

10: Frame

101:Rear fork rod

103:Middle shot

11:Front wheel

12:Rear wheel

121:Limiting bar

13:Car seat

14: handlebar

15: One-way flywheel

20: Trampling mechanism

21: step pole

210: Rotating fulcrum

22: Stampede Department

253:Suspension pull hole

30:Power cable

31: Steel rope

311:Pulley

313:Reversing pulley

35:Chain

40:Manual shifter

41: Gear pipeline

42: Operating lever

421:Grip

50:Return to the tightrope

513:Return pulley

Claims (5)

A pedal-type variable-speed bicycle mainly includes: a frame, a front wheel, a rear wheel, a seat, and a handlebar. It is characterized by: two one-way flywheels, one on the left and one on the central axis on both sides of the rear wheel; a pedaling mechanism with The left and right of the two pedal rods are pivoted on both sides of the frame. The front end of each pedal rod has a pedal portion corresponding to the bottom of the vehicle seat for pedaling; a power cable is wound around the two pedal rods. Between the two one-way flywheels, they are driven by the pedaling mechanism to move back and forth, causing the two one-way flywheels to drive the rear wheels to rotate to provide forward power for the bicycle; a manual shifter is provided on the frame to provide switching adjustment, and is pulled by the gear line The gearbox is provided on the two pedal rods and is engaged with each other. Changing the front and rear positions relative to each other produces different speed changes; the frame further has two rear fork rods, each with a pulley on the left and right upper sections, and a middle rod under the seat. There is a reversing pulley at the rear and lower part; the power cable is further composed of two sections of chains and three sections of steel cables connected at intervals, wherein the two sections of chains are respectively embedded with the two one-way flywheels, and the middle section of the steel cable is bypassed and connected to On the reversing pulley, two sections of left and right steel cables are suspended through the two pulleys and connected to the middle sections of the two left and right step poles respectively, and; the frame is provided with a limit bar below the corresponding two step poles, and There is a rotating fulcrum behind each step rod to lock it at the lower position of the rear fork rod on the corresponding side of the frame. In addition, a return cable is connected to the front of the middle section of the two step rods to straddle the middle part. The two return pulleys on the pole allow the left and right pedaling to move up and down repeatedly. The pedal-type transmission bicycle according to claim 1, wherein the transmission is further composed of a sliding gear plate seat on each pedal rod; the manual shifter is further provided on the cross bar of the frame, and the manual shifter is further provided on the crossbar of the frame. There is an operating lever sandwiched between the left and right bases in the middle of the shifter, and a handle is provided above the operating lever. The pedal-type transmission bicycle as described in claim 2, wherein there is an escapement mechanism of a supporting spring below the operating lever, and a corresponding positioning ratchet bar is provided at the inner bottom of the manual shifter; the two bases Each gear roller is provided with a gear roller, and a gear pipeline is wound around each gear roller. One end of the gear roller is fixed to the side of the manual shifter through a buffer spring, and the other end is connected to the manual gear shifter pipeline. The hole is pulled out to connect to the corresponding transmission located on the step lever on the same side. The pedal-type variable speed bicycle according to claim 3, wherein the pedal is further provided with a guide rail tooth plate, which is movably connected to the sliding tooth plate seat. When assembled, the guide rail tooth plate is positioned on the sliding tooth plate. On the base, the distance between the peaks and valleys of the two teeth is relatively symmetrical, and there is an appropriate distance between the upper and lower teeth of the two, so that the sliding tooth plate seat can still slide without being stepped on. One end of the sliding tooth plate seat is connected to the The gear pipeline is connected and pulled, and the other end is connected to a coil spring on the step rod through an inner steel cable, and a suspension pull hole is provided on the sliding tooth plate seat for the end of the power cable to be connected and pulled. The pedal-type variable-speed bicycle as described in claim 4, wherein the escapement mechanism further includes a reverse clamp handle obliquely provided on one side below the operating lever, and a convex clamp portion is provided on the other side to correspond to a forward clamp handle, which is V-shaped. Its rear is pivoted on the base. When assembled, the backward clamp handle and the forward clamp handle move on the positioning ratchet bar at intervals, and the upper part of the forward clamp handle is opened outside the pawl and is resisted by the supporting spring. On the first gear column of this manual shifter.

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