JP5955565B2 - bicycle - Google Patents

Description

  The present invention relates to a bicycle, and more particularly to a structure for transmitting a driving force of a bicycle.

In a conventional general bicycle, an occupant sits on a saddle, pedals with left and right legs, and rotates a crank arm to transmit a propulsive force to a rear wheel.
In such a driving method for rotating the crank arm, the movement of the pedal connected to the tip of the crank arm is large, and it is difficult to ride without sitting on the saddle.
Therefore, the present inventors have studied a bicycle that can be ridden with a walking sensation, resulting in the present invention.
Patent Document 1 discloses a standing bicycle that is propelled by reciprocating a pedal, but the transmission mechanism of the driving force is complicated, and the frame that connects the front wheel and the rear wheel is in the center in the left-right direction. It is not something you can ride with a walking sensation.

JP 2010-260457 A

  An object of this invention is to provide the bicycle which consists of a simple drive-transmission structure which can get on like a walking.

A bicycle according to the present invention includes a frame body having one front wheel and two rear wheels, a rotation shaft connected to an output sprocket for transmitting rotational force to the rear wheel side, and a pair of shafts connected to both sides of the rotation shaft. An input sprocket with a one-way clutch, wherein the pair of input sprockets are connected to a pair of left and right pedals by respective pedal chains, and the pair of left and right pedals are supported by the frame body by a plurality of links, A pair of left and right pedals are generally swung up and down with the surface of the pedal substantially horizontal, and the output sprocket and a sprocket connected to a drive shaft that drives the left and right rear wheels are connected by an output chain, The drive shaft has transmission sprockets on the left and right, and a sprocket with a one-way clutch connected to the left and right transmission sprockets and the rear wheel shaft of the rear wheel. Prockets are connected to each other by transmission chains .
In this way, the input sprocket with a one-way clutch is connected to the rotating shaft that transmits (outputs) the rotational force to the wheel side, and this input sprocket and the pedal are connected to the chain, so the swinging motion of the pedal rotates around the rotating shaft. Can be input as force.
Therefore, unlike the conventional driving method of rotating the crank arm, the bicycle can be propelled with a relatively small swinging motion of the pedal as compared with the conventional driving method.

In the bicycle according to the present invention, the pedal depression force is input to the rotating shaft via the chain and the input sprocket with the one-way clutch, so that the bicycle can be used as it is as a bicycle propulsion force.
Therefore, it does not matter whether auxiliary power such as a so-called assist electric motor is present.
In the present invention, the rotating shaft can be replaced with a rotating shaft for auxiliary power, or the auxiliary power rotating bicycle can be easily made into a bicycle with auxiliary power by connecting the rotating shaft to the rotating shaft for auxiliary power.

A pair of left and right one-way clutch input sprockets are connected to a rotating shaft to ride a bicycle as if walking more closely, and the pair of left and right input sprockets swings in a pair of left and right alternately in the vertical direction. Each chain is connected to the pedal .
The output sprocket connected to the rotating shaft and the sprocket connected to the drive shaft for driving the left and right rear wheels are chain-connected .
In this case, it is more preferable that the drive shaft has transmission sprockets on the left and right sides, and the left and right transmission sprockets and a sprocket with a one-way clutch connected to the rear wheel shaft are respectively chain-connected.
In order to apply the bicycle according to the present invention to a tricycle, it has one front wheel and two rear wheels, and these two rear wheels can be rotated by the output from the output sprocket connected to the rotation shaft.

In the bicycle according to the present invention, the pedal depression force of the swinging motion is input to the rotating shaft on the side where the wheel is driven to rotate by the input sprocket with the chain and the one-way clutch. Since it can be converted into rotational force, it becomes a bicycle that steps on the pedal as if walking.
Further, a bicycle with assist power can be easily obtained by replacing or connecting the rotation shaft with the rotation shaft of auxiliary power.
Furthermore, when the present invention is applied to a tricycle, there is no need to achieve a balanced balance in the left-right direction, just put the left and right legs on the left and right pedals, and step on the left and right pedals in a walking sense (walking sense) alternately. A bicycle can be propelled, and a sprocket with a one-way clutch is also attached to the rear wheel shaft so that it does not go backward when climbing a slope.

The structural example of the bicycle which concerns on this invention is shown. A rear view of the bicycle with the rear arm opened is shown. The drive transmission structure seen from the pedal side of a bicycle is shown, (a) is a principal part figure (b) shows the enlarged view. The drive transmission enlarged view seen from the front side of the bicycle is shown. The connection structure of a pedal and a frame body is shown. An explanatory view of the movement of the pedal is shown, (a) shows a state where the front pedal is raised, and (b) shows a state where this pedal is lowered.

A structural example of a bicycle according to the present invention will be described below with reference to the drawings, but the present invention is not limited thereto.
First, an example of the frame structure of the vehicle body will be described.
As shown in FIGS. 1 and 2, the bicycle 10 has a handle shaft 12 on the front frame 11 a side of a substantially U-shaped frame body 11 in a plan view in which side frames 11 b are connected to the left and right of the front frame 11 a and a handle 13 on the upper portion thereof. The front wheel 14 is attached to the lower part of the vehicle body, and the rear wheel 15 is connected to the rear part of the side frame 11b via the left and right rear wheel shafts 15a, respectively. A pedal 16 is provided.
Moreover, you may attach the connection frame 11d which connects between the side frames 11b as needed.
The rear portion of the side frame 11b is connected to the subframe 11c, and the rear wheel shaft 15a and the rear wheel 15 are disposed inside the Y-shape.
Accordingly, in the frame body 11 according to the present invention, if a basic frame is formed by the front frame and its left and right side frames, and the pedal 16 is disposed on the inside, the frame body 11 is connected to the middle of the side frame or to the rear portion. A frame provided with a frame 11d may be used.
In this embodiment, the rear arm 18 is erected from the left and right side frames so that the body can be left behind when the user stands on the pedal.
The rear arm 18 is composed of a side frame and a standing frame 18a and an upper portion thereof, and an arm portion 18b that can be freely opened upward. FIG. 2 shows a state in which the arm portion 18b is opened upward.

A support frame 12c is erected obliquely forward from the front frame 11a, and a pipe member 12a is connected to the support frame 12c so as to have an inverted Y shape.
A handle shaft 12 is inserted into the pipe member 12a, a front wheel holding arm 12b is connected to the lower portion, and a front wheel 14 is pivotally attached 14a to the front wheel holding arm 12b.
The bicycle according to the present invention is characterized by a drive transmission structure, and the frame structure is not limited thereto.

Next, a drive system that transmits the depression force of the pedal 16 to the rear wheel side will be described.
As shown in FIGS. 5 and 6, the left and right pedals 16 are supported by the two link members from the side frame 11b to the first link 17a and the second link 17b so that the upper surface of the pedal 16 is substantially horizontal, Swing alternately in the vertical direction while moving to.
In this embodiment, as shown in FIGS. 3 and 4, the auxiliary power 20 is connected to the lower portion of the front frame 11a.
As the auxiliary power 20, an assist electric motor is used. An output sprocket 23 and input sprockets 22 and 22 with a pair of left and right one-way clutches are connected to a rotating shaft 21 of the assist electric motor.
The input sprocket 22 is chain-connected by the pedal 16 and the pedal chain 40.
One end 40a of the pedal chain 40 is connected to the pedal 16 side, and the other end 40b is connected to the tensioner 32 side.
The tensioner 32 is biased in the direction of pulling the other end 40b of the pedal chain 40 by a spring 32a attached to the spring attachment portion 34a, and prevents the chain from loosening when the pedal 16 is raised.
The left and right tensioners 32, 32 are connected by a connecting shaft 34, and the left and right tensioners are arranged so as to be symmetrical with each other shifted by about 180 °.
An interlocking link 30 supported by a support bracket 33 from the auxiliary power 20 side is rotatably provided, and both ends of the interlocking link 30 are linked to the pedals 16 and 16 by pedal links 31 and 31, respectively. .
Thus, when one of the pair of left and right pedals 16, 16 is depressed, the other pedal 16 is raised by the rotation of the interlocking link 30.
In addition, as long as the left and right pedals move up and down alternately, the link structure is not limited, and gear connection or the like may be used and the means is not limited.

FIG. 6 shows an explanatory diagram of the movement of the left and right pedals 16 and 16.
(A) shows a state where the pedal 16 on the paper surface and the front side is raised. In this state, the other end 40b of the pedal chain 40 moves while being pulled toward the pedal side by the urging force of the tensioner 32.
When the front pedal is stepped on from this state, one end 40a connected to the pedal side of the pedal chain 40 is pulled, so that the rotational force is transmitted to the input sprocket by the movement of the chain, and the interlocking link 30 articulated to the pedal link 31. The pedal on the back side is raised by the rotation of.
Next, when the pedal on the back side is depressed, the pedal on the near side is raised.
Alternating rotational force is transmitted to the rotating shaft of the auxiliary power via the input sprocket 22 with left and right one-way clutches, and the rotational force output to the output sprocket 23 while receiving the assist of the auxiliary power is transmitted via the output chain 41. It is transmitted to a sprocket (first transmission sprocket) 24 connected to the drive shaft 26.
The rotational force of the first transmission sprocket 24 is transmitted to the drive shaft 26 in the left-right direction, and the one-way on the rear wheel side by the left and right transmission chains 42 via the second transmission sprockets 25, 25 connected to both ends thereof. The rotational force is transmitted to the sprocket 27 side with the clutch.
As a result, the rear wheel 15 rotates and the bicycle moves forward.
Further, the rotary shaft 21 according to the present invention does not necessarily have to be the rotary shaft of the auxiliary power 20, and one output sprocket 23 and a pair of left and right input sprockets are connected by a shaft-like rotary shaft. You may pivot on the arm side.

DESCRIPTION OF SYMBOLS 10 Bicycle 11 Frame body 11a Front frame 11b Side frame 11d Connection frame 12 Handle shaft 13 Handle 14 Front wheel 15 Rear wheel 15a Rear wheel shaft 16 Pedal 17a First link 17b Second link 20 Auxiliary power 21 Rotating shaft 22 Input sprocket 23 Output sprocket 24 First transmission sprocket 25 Second transmission sprocket 26 Drive shaft 27 Sprocket 30 Connection link 31 Pedal link 32 Tensioner 32a Spring 34 Connection shaft 40 Pedal chain 41 Output chain 42 Transmission chain

Claims (1)

A rotating shaft in which a frame body having one front wheel and two rear wheels and an output sprocket for transmitting rotational force to the rear wheel side are coupled ;
It has an input sprocket with a pair of one-way clutches connected to both sides of the rotating shaft,
The pair of input sprockets are connected to a pair of left and right pedals by pedal chains, respectively.
The pair of left and right pedals are respectively supported by the frame body by a plurality of links, and the pair of left and right pedals swings up and down in a state where the surface of the pedal is substantially horizontal,
The output sprocket and the sprocket connected to the drive shaft that drives the left and right rear wheels are connected by an output chain,
The drive shaft has transmission sprockets on the left and right, and the left and right transmission sprockets and a sprocket with a one-way clutch connected to the rear wheel shaft of the rear wheel are connected by transmission chains, respectively .

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