KR101759094B1 - Driving apparatus using a stepping manner - Google Patents

Abstract

The present invention relates to a driving apparatus using a stepping method in which there is less loss of force applicable to a recumbent bicycle or the like, A wire coupling body (200) for transmitting a reciprocating motion of the stepping device to a drive wheel; A freewheeling unit 300 for converting the traction force of the wire into a rotational force to the drive wheel; And a transmission 400 that varies the rotation ratio by changing the position of the wire connected to the lever. Therefore, the force applied to the pedal can be transmitted to the drive wheel without loss, so that it is possible to achieve a high speed even with a small force, and it is possible to reduce the muscle fatigue because the stepping motion width can be varied. Therefore, this device has an effect that it is very suitable to be applied to driving devices such as bicycles and wheelchairs for aged people with weak muscles and persons with disabilities.

Description

[0001] The present invention relates to a driving apparatus using a stepping method,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a driving apparatus using a stepping method, and more particularly to a driving apparatus using a stepping method in which loss of force applicable to a recumbent bicycle or the like is small.

Most of the existing bicycles use a pedaling system that rotates the crankshaft by stepping on the pedal. When the pedal that applies the force is placed on the vertical line with the crankshaft, the force applied to the pedal is not transmitted by the rotational force, And the same amount of rotational movement about the crankshaft is repeated infinitely so that the knee joint is burdened and the fatigue of the muscles is easily increased.

Existing bicycles are equipped with sprockets and chains to transmit the power generated by the pedaling movement to the drive wheels. In particular, the long chains installed on the recumbent bicycles not only detract from the aesthetics of bicycles, but also damage due to chain deviation, Or there is a risk of contamination.

Existing evolved bikes are structured to vary the rotation ratio by installing several gears in the front and rear drive system for shifting. In addition to a plurality of gears, complex mechanical structures such as front and rear derailleurs for positioning the chain in a desired rotation ratio are required .

Many bicycle companies are competing to develop technologies to lighten the weight of bicycles, and the value of bicycles is inversely proportional to their weight.

1 is a view showing a conventional recumbent bicycle. 2 is a view for explaining the power loss rate of the pedaling system applied to FIG. 3 is a graph showing a change in the rotation ratio of the transmission according to the prior art.

As shown in FIG. 1, the conventional recumbent bicycle according to the related art is provided with a long chain in the pedaling means. In the conventional pedaling system, as shown in FIG. 2, when the pedal is located at the highest point or the lowest point, And the power transmission rate is only 63.3%. Thus, the force pressing the remaining pedal is lost in the axial direction without being transmitted by the rotational force.

In the case of a transmission provided in a recumbent bicycle of such a pedaling system, a 33-speed product has been introduced to the market, but the graph of FIG. 3 is for the case of 24 stages in which three gears are provided on the driving- , The amount of change in the rotation rate of each stage does not increase or decrease constantly. Therefore, the variation of the rotation ratio is not continuous and inconvenient to use.

In order to solve such a problem, it is an object of the present invention to provide a driving apparatus using a stepping method in which a stepping motion method can be applied instead of a pedaling motion method in which a force is lost much.

It is another object of the present invention to provide a driving apparatus using a stepping method for rotating a driving wheel using a high-tension wire instead of a chain for power transmission.

It is another object of the present invention to provide a driving apparatus using a stepping method in which the rotation ratio of a driving wheel is varied by changing the length of an arm in a lever principle without requiring a complicated mechanical apparatus such as a plurality of gears and a drainer.

It is another object of the present invention to provide a driving apparatus using a stepping method that can simplify the structure and apply a light material so that the weight of the bicycle can be remarkably reduced compared to the same performance.

The driving device using the stepping method according to the embodiment of the present invention is installed so that a pair of levers hinged to the driving shaft of the front part of the vehicle body cross each other and reciprocate, A wire coupling body (200) for transmitting a reciprocating motion of the stepping device to a drive wheel; A freewheeling unit 300 for converting the traction force of the wire into a rotational force to the drive wheel; And a transmission 400 that varies the rotation ratio by changing the position of the wire connected to the lever.

The stepping device 100 driving the bicycle may include a pair of levers 110, a drive shaft 120 fixed to a frame serving as a hinge of the leverage 110, A pedal 130 installed on the opposite side of the drive shaft 120 so as to apply a force to the levers 110 and a wire 140 connecting the pair of levers 110 to allow the levers 110 to cross move, A wheel 150 for holding the wire 140 to transmit the kinetic energy of the wire 110 to another lever 110 and a wire 140 for generating a pendulum movement of the pair of the levers 110. [ Shaped wire guide 160 attached to the levers 110 about the axis of the levers 110 to prevent clearance between the lever 150 and the bowl 150. [

The wire assembly 200 includes a composite high tension wire 210, a chain portion 220 for transmitting the pulling force of the wire 210 to the free wheel by rotational force, a chain portion 220 for wrapping the left and right freewheels, A wire 230 for constituting the wire 220 as one closed circuit and a wheel 240 coupled to the wire 230.

The freewheeling unit 300 includes a hub 310 that supports a driving wheel and smoothly rotates and a pair of left and right freewheels 320 that transmit power in order to continuously transmit rotational force A plurality of pawls 321 are formed on the outer shaft portion of the freewheel 320 and the length of the pawl 321 may be formed differently.

As an embodiment related to the present invention, the transmission 400 includes a spiral transmission 410 for moving the connection portion of the wire to a specific position of the lever to obtain a desired rotation ratio, a rotation device 420 for rotating the transmission, And a connecting ring 430 for connecting the wire to the stepper device while easily changing the position of the wire during operation of the transmission. The end face of the helical type transmission 410 may be formed in a fan shape around the free wheel .

According to the present invention, since the force applied to the pedal can be transmitted to the drive wheel without loss, it is possible to achieve a high speed even with a small force, and the movement width of the stepping can be varied, thereby reducing muscle fatigue. Therefore, this device has an effect that it is very suitable to be applied to driving devices such as bicycles and wheelchairs for aged people with weak muscles and persons with disabilities.

In addition, the present invention uses a wire instead of a chain to transmit power to a drive wheel from a driving source, thereby not only enhancing the appearance of the bicycle but also preventing the chain from falling off or damaging or polluting the body or clothes from being caught in the chain There is an effect to be able to.

In addition, the present invention has the effect of providing a continuously variable shifting function or a continuously variable shifting function by varying the length of the arm in the principle of the leverage and changing the rotation ratio of the drive wheels.

In addition, the present invention uses a lightweight composite wire such as kebola or aramid instead of a conventional chain, and simplifies the transmission to avoid the use of a plurality of gears and drains, which are the conventional transmission components, so that a lightweight bicycle can be manufactured at low cost .

1 is a view showing a conventional recumbent bicycle.
FIG. 2 is a view for explaining a power loss rate of the pedaling system applied to FIG. 1. FIG.
3 is a graph showing a change in the rotation ratio of the transmission according to the related art.
4 is a view for explaining a driving apparatus using a stepping method according to the present invention.
FIG. 5 is a conceptual diagram of a stepping-type driving apparatus applied to FIG.
FIG. 5A is a view for explaining an application example in which the gear wheel of the freewheel is replaced with a wire guide groove, among driving devices of the stepping type applied to FIG.
FIG. 5B is a view for explaining an example in which a bevel gear set is applied to guide reciprocating movement of a leverage, and an example in which a traction rod is applied instead of a traction wire, among driving devices of the stepping type applied in FIG.
FIG. 6 is a view for explaining the motion width of the stepping type driving apparatus of FIG. 5; FIG.
7 is a view for explaining a coupling structure of a hub and a freewheel of a driving wheel applied to the present invention.
8 is a cross-sectional view of the hub and the free wheel of the drive wheel of Fig. 7;
9 is a cross-sectional view of a ratchet structure of a freewheel in which a pole is formed in an outer shaft portion.
10 is a conceptual diagram of a transmission using a lever principle.
FIG. 11 is a view for explaining the power loss rate of the stepping method applied to FIG.
12 is another embodiment of the present invention.

It is noted that the technical terms used in the present invention are used only to describe specific embodiments and are not intended to limit the present invention. In addition, the technical terms used in the present invention should be construed in a sense generally understood by a person having ordinary skill in the art to which the present invention belongs, unless otherwise defined in the present invention, Should not be construed to mean, or be interpreted in an excessively reduced sense. In addition, when a technical term used in the present invention is an erroneous technical term that does not accurately express the concept of the present invention, it should be understood that technical terms can be understood by those skilled in the art. In addition, the general terms used in the present invention should be interpreted according to a predefined or prior context, and should not be construed as being excessively reduced.

Furthermore, the singular expressions used in the present invention include plural expressions unless the context clearly dictates otherwise. In the present invention, terms such as "comprising" or "comprising" and the like should not be construed as encompassing various elements or various steps of the invention, Or may further include additional components or steps.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, wherein like reference numerals refer to like or similar elements throughout the several views, and redundant description thereof will be omitted.

4 is a view for explaining a driving apparatus using a stepping method according to the present invention. FIG. 5 is a conceptual diagram of a stepping-type driving apparatus applied to FIG. FIG. 5A is a view for explaining an application example in which the gear wheel of the freewheel is replaced with a wire guide groove, among driving devices of the stepping type applied to FIG. FIG. 5B is a view for explaining an example in which a bevel gear set is applied to guide reciprocating movement of a leverage, and an example in which a traction rod is applied instead of a traction wire, among driving devices of the stepping type applied in FIG. FIG. 6 is a view for explaining the motion width of the stepping type driving apparatus of FIG. 5; 7 is a view for explaining a coupling structure of a hub and a freewheel of a driving wheel applied to the present invention. 8 is a cross-sectional view of the hub and the free wheel of the drive wheel of Fig. 7; 9 is a cross-sectional view of a ratchet structure of a freewheel in which a pole is formed in an outer shaft portion. 10 is a conceptual diagram of a transmission using a lever principle. FIG. 11 is a view for explaining the power loss rate of the stepping method applied to FIG. 12 is another embodiment of the present invention.

The driving device of the stepping type mainly for the recumbent bicycle and the similar mechanism is structured such that a pair of left and right levers 110 are moved to intersect with each other about a fixed axis and the leverage shaft 120 The wire 210 is pulled up to the intermediate portion of the lever when the force is applied to a certain one of the lever pedals. The wire 210 is connected to the pair of left and right wheels The wire 210 rotates the freewheel 320 at one end of the freewheel 320 and rotates the drive wheel while the other end of the freewheel 320 is wrapped around the freewheel 320 through the pulley 240 fixed to the frame, The other lever is connected to the middle of the lever so that the lever that does not apply the force moves in the opposite direction to the lever that applies the force, When a force is applied alternately to the levers in the opposite direction, the drive wheel is continuously rotated while wrapping around the other free wheel 320 through the connected wire 210. In this case, When the lever is reciprocated, the left and right pair of freewheels 320 mounted on the drive wheels are alternately pulled through the connected wires to continuously rotate the drive wheels.

The stepping device 100 of the driving unit that the first occupant powers the device includes a pair of levers 110, a driving shaft 120 fixed to the frame serving as a hinge of the levers 110, A wire 140 connecting the two levers 110 so that the leverage 110 can perform a crossing motion and a wire 140 connecting between the wire 140 and the dolly 150, Shaped wire guide 160 attached to the lever 110 around the axis of the lever to prevent clearance.

In another embodiment, a bevel gear set may be used instead of the wire 140 and the drill 150 to guide the crossover motion, and briefly described, a pair of levers 110 and a leverage hinge A pedal 130 provided on the opposite side of the hinge so as to exert a force on the lever 110 and a pair of levers 110 attached to the lever 110 such that the lever 110 can cross- And a bevel gear 170 fixed to a shaft perpendicular to the drive shaft 120 and adapted to be engaged and rotated simultaneously with the bevel gear 170 installed on the two levers 110. [

A wire assembly 200 for transmitting the power of the stepper to a drive wheel includes a composite high tension wire 210, a chain portion 220 for transmitting the pulling force of the wire 210 to the free wheel by rotational force, And a pulley 240 that constitutes the wire coupling 200 as a closed circuit and switches the direction of a force without loss of force.

In order to transmit the pulling force of the wire 210 to the drive wheels by the rotational force, the high-tension wire 210 of the composite material and the free wheel teeth 210 of the wire 210 are used in place of the chain portion 220 surrounding the freewheel. A wire fixed along the formed guide groove 330, and a pulley 240 constituting one closed loop thereof and switching the direction of the force without loss of force.

A traction rod 250 is provided in place of the traction wire coupling body 200 and is structured such that a pair of right and left leverage rods 110 are moved to intersect with each other around a fixed axis and a lever shaft 120 And a bevel gear set is provided to enable mutual intersecting movement of the levers. When a force is applied to a certain one of the leverage pedals, a traction rod (not shown) fixed to the middle portion of the levers And the traction rod 250 is in contact with the upper ends of the free wheels of either one of the pair of free wheels 320 installed on the left and right sides of the drive wheel shaft, and the tow bar 250 and the garden wheel formed in the freewheel 320 When the levers that have applied the force reach the limit, when the levers in the opposite direction cross each other while applying the alternating force, when the driving wheel is rotated while being engaged with each other, The free wheel 320 of the freewheel 320 is rotated to continuously rotate the driving wheel. When the occupant reciprocates the lever 110 through the stepping operation, the pair of right and left free wheels mounted on the driving wheel So that the drive wheels can be continuously rotated by traction alternately.

The freewheeling unit 300 for converting the traction force of the wire into the rotational force of the driving wheel includes a hub 310 for supporting the driving wheel and smoothly rotating the driving wheel 300 and a pair of left and right wheels for transmitting the rotational force And a free wheel 320.

At this time, a plurality of pawls 321 are formed at the freewheel outer shaft portion of the freewheel 300. At this time, the length of the pawl 321 is differently formed because the length of the pawl is different, The rotation reaction speed and the clearance are minimized and the impact force applied to the pawl 321 and the gardener 322 is minimized so that the durability can be increased.

The transmission 400 that changes the position of the wire 210 connected to the leverage 110 of the stepping device to change the rotation ratio may change the connection position of the wire 210 to a specific position of the lever 110 A rotation device 420 for rotating the transmission 410 and a wire 210 connected to the stepper device while easily changing the position of the wire 210 during operation of the transmission The connection is made up of a connection ring 430.

In order to minimize the change in the overall length of the wire due to the change of the position of the wire 210 due to the speed change, the end surface of the helical type transmission 410 is formed into a fan shape around the freewheel 320 as a center.

The driving apparatus using the stepping system constructed as described above will be described again as follows.

As shown in FIGS. 4 and 6, the recumbent bicycle to which the driving device using the stepping system of the present invention is applied includes a pair of levers 110 and pedals 130, and a pair of levers The wire 140 and the pulley 150 are also installed on the front side and constitute one closed circuit with the wire connecting body 200 on the right side. The tractive force of the wire 200 connected to the lever 110 is switched to the rotational force through the rear wheel freewheel 310 when the pedal is depressed. When the lever reaches the limit of movement, the opposite pedal is positioned at the opposite position by the crossing motion, so that the opposite pedal can be stepped. The rotational force can be continuously transmitted to the drive wheels while repeating the above-described processes. Thus, as shown in FIG. 11, when the motion range is assumed to be 60 degrees, the power transfer rate is 95.3% and the loss rate is only 4.7%.

Referring to FIG. 6, the driving apparatus of the stepping type applied to the present invention will be described. In the stepping method, when the movement width of the lever is 60 degrees and the length of the lever 110 is 34 cm, the movement width is equal to the movement width of the pedal . In other words, in the conventional pedal system, the rotation radius of the pedal is about 17 cm, so the movement width is 34 cm.

In the case of the stepping type driving apparatus shown in FIG. 6, the user can vary the exercise width every time, and in the case of the pedaling in which the exercise width is fixed at 34 cm, the same exercise is repeated infinitely, However, the recumbent bicycle to which the stepping method according to the present invention is applied can be easily operated by the elderly or the disabled. In addition, the treading force uses the thigh muscles. The less the width of the exercise, the greater the strength can be exerted. Therefore, it is advantageous to obtain the effect by varying the exercise width without depending on the transmission.

7 and 8, a pair of left and right freewheels 320 are mounted around the hub 310 of the driving wheel so that the pulling force of the wire 200 generated by the stepping is transmitted to the driving wheels . In addition, the position of the bearings and the ratchet structures are determined so as to maximize the rolling property by minimizing the rotational friction and to maximize the durability in consideration of the load for each part by each part. The hub 310 includes an axle 311, A pair of bearing cone 312 and bearing 313 are positioned directly below the freewheel 320 to provide a stable structure. The freewheel 320 is formed in the outer shaft portion of the pole 321 and in the inner shaft portion of the gardenia 322.

FIG. 9 is a cross-sectional view of a ratchet structure of a freewheel in which a pole is formed in an outer shroud. In order to realize the driving mechanism of the present invention, the most technical consideration is the durability of the freewheel. Since the 'binding-release' process of the left and right freewheel ratchet structure is continuously repeated by the stepping, the impact generated repeatedly as the clearance generated by the arrangement interval of the pawls 321 and the size of the gardener 322 idles. Here, the magnitude of the impact force generated in the binding process of the ratchet structure decreases as the number of the pawls 321 increases, and as the size of the gardener 322 decreases, the idling clearance decreases and the impact force decreases. The present invention is characterized in that it is formed in the outer shell portion so as to form the ratchet structure as much as possible, and the arrangement intervals of the pawls are shifted from each other and the length of the pawl is made different. The spring 324 can be formed as a thin plate-like U-shaped plate, but can expand the circular portion to the same size as the base portion of the pole to maximize the movement width.

FIG. 10 is a conceptual view of a helical transmission using a lever principle. When the length of the arm is different from the principle of the lever, it is possible to exert a large force with the same force or to switch to a larger width motion. When the wire connection part is moved in the direction of the pedal, the movement width can be increased while moving at a high speed. On the contrary, if the wire connection part is moved in the hinge direction, the movement width becomes smaller. When the helical transmission 410 installed side by side with the lever 110 is rotated by the rotating device 420, the position of the wire connecting ring 430 changes up and down, and the rotation ratio is changed to a very simple structure. In addition, the increase and decrease of the rotation ratio is continuously generated, so that it is a continuously variable transmission. If the wire position changes for shifting, a clearance may occur as the distance to the freewheel changes. In view of this point, the cross section of the body of the spiral transmission 410 is gently rounded to prevent this. The distance between the wire and the freewheel is kept constant even if the wire loop 430 is positioned at the upper and lower positions so as to coincide with the shape of the arc centering on the free wheel 320,

FIG. 12 is an example of application to a similar mechanism of a stepping type driving apparatus according to another embodiment of the present invention. FIG. The stepping drive system can be applied to various mechanisms in different positions. The picture above is an example applied to a long base recumbent bicycle. The application of this method is equally applicable to the three-wheeled recumbent. In addition, if the stepper device is installed on the driving wheel side and the lever is installed long, it is also applicable to a method of operating the stepper by pushing it by hand for the disabled person of the lower half. The lower figure is an example applied to a general bicycle. The difference is that the levers (241) are installed at the bottom of the saddle so as to transmit the pulling force of the wire to the freewheel.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or essential characteristics thereof. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

100: Stepping device
110: Lever 120: Drive shaft
130: Pedal
200:
210: pull wire 220: chain part
300: Freewheel part
310: Hub 320: Freewheel
321: Pull 322: Gardenia
400: transmission
410: Spiral transmission 420: Rotary device

Claims (5)

As a driving source for bicycles,
A stepping device (100) installed to reciprocate a pair of levers hinged to a drive shaft of a front portion of a vehicle body, the two levers intersecting each other;
A wire coupling body 200 for transmitting a pulling force generated as a result of the reciprocating movement of the stepping device 100 to a freewheeling part 300 of a drive wheel positioned behind the bicycle;
A freewheeling unit 300 that turns the pulling force of the wire assembly 200 to a driving wheel positioned behind the bicycle; And
The spiral rotator provided parallel to the levers of the stepping device 100 rotates and moves the pulling position of the wire assembly 200 up and down the lever so that the movement width of the wire assembly 200 is increased A transmission device 400 that varies the rotation ratio of the free wheel portion by reducing the rotation speed of the free wheel portion;
And a driving unit for driving the stepping motor. The method according to claim 1,
The stepping device (100) as a drive source of the bicycle,
A pair of levers 110,
A driving shaft 120 fixed to a frame serving as a hinge of the lever 110,
A pedal 130 installed on the opposite side of the hinge so as to apply a force to the lever 110,
A wire 140 connecting the pair of levers 110 so that the levers 110 can perform a crossing movement,
A pulley 150 for holding the wire 140 to transfer kinetic energy of one lever 110 to another lever 110,
And prevents the clearance between the wire 140 and the pulley 150 caused by the pendulum movement of the pair of levers 110 and prevents a gap between the levers 150 and the fan 140 The wire guide 160 of FIG.
And a stepping motor. The method according to claim 1,
The wire bonding body 200 is a wire-
High strength wire 210 of composite material,
A chain portion 220 which surrounds the left and right freewheels of the wire 210 and transmits rotation force to the freewheel while rotating,
A wire portion 230 for forming the wire 210 and the chain portion 220 as one closed circuit,
A pulley 240 coupled to the wire 230,
And a stepping motor. The method according to claim 1,
A free wheel unit 300 for switching the driving wheel to a rotational force,
A hub 310 that supports the drive wheel and smoothly rotates,
And a pair of left and right freewheels 320 that cross each other to transmit rotational power continuously,
A plurality of plows 321 are formed on the outer shaft portion of the freewheel 320,
And the length of the pole (321) is differently formed. The method according to claim 1,
A speed change device 400 that changes the position of the wire and changes the rotation rate,
A spiral transmission 410 for moving the connection portion of the wire to a specific position of the lever to obtain a desired rotation ratio,
A rotating device 420 for rotating the transmission,
And a connection ring 430 connecting the wire to the stepper device while easily changing the position of the wire during the operation of the transmission,
Wherein the spiral transmission (410) is formed in the shape of a sector having a fan shape around the free wheel.

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