KR100854586B1 - bicycle having pedals operated by reciprocating motion - Google Patents

Abstract

The present invention relates to a pedal bicycle that reciprocates only a certain section rather than a rotation. A bicycle comprising: a first sprocket wheel (34) coupled to one end of a crankshaft (24) to enable torque transmission to a drive sprocket wheel (26); A second sprocket wheel 36 coupled to the other end of the crankshaft 24 so as to allow torque transmission; A bracket (38) fixed to the frame (2); First and second ratchet wheels 40 and 42 installed on the bracket 38 and interlocked with the first and second sprocket wheels 34 and 36 by first and second chains 44 and 46; First and second push levers 48 and 50 having one end connected to the first and second ratchet wheels 40 and 42 so that torque transmission is possible, and pedals 52 and 54 installed at the other end thereof, respectively; By including connecting means connected on said first and second push levers (48,50) to cause said first and second push levers (48,50) to reciprocate out of phase; By alternately pressing the pedal (52, 54) is characterized in that the drive sprocket wheel 26 to be driven continuously.

Bicycle, Step, Pedal, Reciprocating

Description

Bicycle having pedals operated by reciprocating motion

1 is a side configuration diagram of a bicycle according to an embodiment of the present invention.

FIG. 2 is a schematic front view, and FIG. 3 is a perspective view of a main part.

Figure 4 (a) (b) is a side view of the first and second push lever according to another embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

2 ; Frame 24; Crankshaft

26; Drive sprocket wheel 28; Driven sprocket wheel

32; Drive chain 34,36; 1st, 2nd sprocket wheel

38; Bracket 40,42; 1, 2 ratchet wheel

44,46; First and second chains 48,50 (48 ', 48 ", 50', 50"); 1st, 2nd push lever

52,54 (52 ', 54'); Pedal 56; Pulley

58; wire

The present invention relates to a bicycle, and more particularly, to a pedal bicycle for reciprocating a certain section rather than a rotation.

Bicycles have a long history of being popular and widely used because they are easy to use and inexpensive. The driving of the bicycle is usually two pedals which rotate 360 degrees. In order to generate a predetermined torque, the crank arm must be of constant length, and since the pedal rotates 360 °, its stroke in the vertical direction is twice that of the crank arm. Therefore, the driver's legs should be circular in diameter up to twice the diameter of the crank arm. In the case of the general public because the body is flexible, there will be no discomfort, but the elderly, disabled people, etc. are uncomfortable or inflexible body is very burdened with the above range of leg exercises.

It is an object of the present invention to provide a bicycle of the type in which the pedal only reciprocates within a certain angle range. In addition, it is a specific object of the present invention to provide a bicycle having a reciprocating pedal that can be conveniently used by a user with a small height by allowing the center of rotation of the crank arm to be adjacent to the driver's body. Another object is to provide a bicycle having a reciprocating pedal capable of generating the desired torque even with a small force.

The above object is, the top of the seat and the handle is installed on the front and rear of the truss frame frame is installed; A drive sprocket wheel installed at the bottom of the frame; A driven sprocket wheel installed on the rear wheel hub and connected to the drive sprocket wheel by a drive chain; A bicycle comprising a crankshaft fitted to a center of the drive sprocket wheel for transmitting torque transmitted from a pedal to the drive sprocket wheel;

A first sprocket wheel coupled to one end of the crankshaft to enable torque transmission to the drive sprocket wheel; A second sprocket wheel that is coupled to the other end of the crankshaft so as to transmit torque and has a diameter the same as that of the first sprocket wheel; A bracket fixed to the frame; First and second ratchet wheels symmetrically installed on the bracket to be positioned between the crankshaft and the seat, the first and second ratchet wheels interlocked with the first and second sprocket wheels by first and second chains; First and second push levers, one end of which is connected to the first and second ratchet wheels so as to transmit torque, and the other end of which a pedal is installed; Including connecting means connected to said first and second push levers to cause said first and second push levers to reciprocate out of phase;

When the pedal is alternately stepped, the ratchet wheel is achieved by a bicycle having a reciprocating pedal, characterized in that to drive the drive sprocket wheel continuously.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. 1 is a side configuration diagram of a bicycle according to an embodiment of the present invention. Figure 2 is a front configuration diagram, Figure 3 is a perspective view of the main part.

Frame 2 of the bicycle shown in Figure 1 is a general diamond frame, a top tube (4, top tube), the handle tube (6, handle stem) is inserted into the rotatable head tube (8, head tube, upper) It has a truss structure by a seat tube 10, a seat tube 12, a down tube 12, a seat stay 14, a seat stay, and a chain stay 16 on which the seat 9 is placed.

It is clear that the present invention is not limited to the bicycle having the diamond frame above. That is, it can be applied to a bicycle having a frame of various structures by appropriately changing each component described below.

Only the main parts of the general bicycle related to the present invention will be described briefly. The seat 9 and the handle 18 are installed on the upper part of the frame 2, and the wheels 20 and 22 are installed at the front and rear, respectively. At the point where the seat tube 10 and the down tube 12 contact, the crankshaft 24 is installed in the transverse direction through a bottom bracket bearing. The drive sprocket wheel 26 is axially coupled to rotate together at one end of the crankshaft 24. The driven sprocket wheel 28 is installed on the rear wheel hub 30 and is connected to the drive sprocket wheel 26 by the drive chain 32. As a result, when the crankshaft 24 is rotated using a conventional pedal (not shown), the torque is transmitted to the driven sprocket wheel 28 through the drive sprocket wheel 26 and the drive chain 32 so that the rear wheel 22 ) Will be driven.

Hereinafter, the features of the present invention will be described in combination with the above configuration.

The first sprocket wheel 34 is attached to and fixed to the drive sprocket wheel 26 so as to rotate together at the same center of rotation as the drive sprocket wheel 26, or is coupled to one end of the crankshaft 24 to allow torque transmission. . Therefore, the rotational force applied to the first sprocket wheel 34 may be transmitted to the rear wheel 22. The diameter of the first sprocket wheel 34 is smaller than the diameter of the drive sprocket wheel 26.

On the opposite side of the first sprocket 34, a second sprocket wheel 36 having the same diameter is coupled to the other end of the crankshaft 24 so as to allow torque transmission. Therefore, the rotational force applied to the second sprocket wheel 36 may also be transmitted to the rear wheel 22.

The bracket 38 is fixed to the basic frame 2 of the bicycle by conventional fastening means such as welding, bolts, clamps, and the like. According to the shape of the frame 2, the bracket 38 may be variously modified with a thread. Since the bracket 38 is subjected to a large load on itself, the bracket 38 should be installed in the frame 2 so as to maintain sufficient rigidity. In addition, material and structural considerations should be followed to lower its own weight. In the accompanying drawings, a specific shape and coupling method of the bracket are omitted.

The first and second ratchet wheels 40 and 42 are installed symmetrically on both sides of the bracket 38 such that the first and second ratchet wheels 40 and 42 are adjacent to the seat 9 (i.e., positioned between the driving sprocket wheel 26 and the seat 9). (The second ratchet wheel 42 is shown in FIG. 2, the same below). Their axis of rotation is placed on the same line. As is known, the ratchet wheel is a known mechanical element for transmitting rotational force in only one direction, so no detailed description thereof will be required. In the present invention, the first ratchet wheel 40 is to transmit the rotational force only when rotated in the clockwise case in FIG.

The first ratchet wheel 40 and the first sprocket wheel 34 are connected to the first chain 44, and the second ratchet wheel 42 and the second sprocket wheel 42 are connected to the second chain 46 (FIG. 2). Reference, the same below). Therefore, the first and second ratchet wheels 40 and 42 can transmit the rotational force to the rear wheel 22 through separate transmission lines.

The long first push lever 48 is connected to the first ratchet wheel 40 to transmit torque, and the second push lever 50 of the same length to the second ratchet wheel 42 to transmit torque. do. Pedals 52 and 54 are connected to the other ends of the push levers 48 and 50, respectively. The shape of the pedals 52 and 54 may be variously changed. Each pedal 52, 54 is preferably capable of tilting at the ends of the first and second push levers 48, 50.

The core of the present invention resides in a configuration in which the first and second push levers 48 and 50 are reciprocated with opposite phases. The driver can drive the drive sprocket wheel 26 continuously by alternately stepping on the pedals 52 and 54 while seated on the seat. To this end, when the first push lever 48 is lowered, the second push lever 50 is raised. On the contrary, when the second push lever 50 is lowered, the connection for allowing the first push lever 48 to be raised. Means are needed. The connecting means will be described below.

First, the pulley 56 is installed on the top tube 4 of the frame. Both ends of the flexible connecting member such as the wire 58 and the belt are connected to the intermediate points of the first and second push levers 48 and 50 via the pulley 56, respectively. The pulley 56 is preferably rotatable and the connecting member is preferably wire 58. In order to effectively use the principle of lever, it may be desirable to connect the connection points of the wire 58 and the first and second push levers 48 and 50 to the first and second ratchet wheels 40 and 42 as much as possible. On the other hand, the pulley 56 may be installed on the bracket 38. In addition, as illustrated, the diameters of the first and second sprocket wheels 34 and 36 are smaller than the diameters of the first and second ratchet wheels 40 and 42, and the reduction ratio is determined according to the ratio of the dimensions. According to the principle, it is possible to drive the first and second sprocket wheels 34 and 36 with a relatively small force.

According to the above configuration, when the driver alternately presses the pedals 52 and 54, the driving sprocket wheel 26 is continuously driven by the first and second ratchet wheels 40 and 42. In addition, the source of rotational force generation is located just below the seat 10 or at an adjacent point thereof (ie, adjacent to the driver's body). In addition, since the length of the first and second push levers 48 and 50 can be increased, the driving sprocket wheel 26 can be driven with a small force.

All or some of the above-described components, including the first and second chains 44 and 46, may be covered with a synthetic resin cover (not shown) for aesthetics or the like. The position of the first and second ratchet wheels 40 and 42 may be changed by changing the installation position of the bracket 38 to suit the use of the bicycle or the characteristics of the user.

4 (a) and (b) show a modified form of the first and second push levers according to another embodiment of the present invention. FIG. 4 (a) shows a shape in which the push levers 48 'and 50' are curved in an arc rather than in a straight line. Pedals 52 and 54 can click at their ends.

On the other hand, it is also possible to change the length of the push lever 48 ", 50" or the position of the pedal according to the user's selection. 4 (b) shows a state in which separate pedals 52 ′ and 54 ′ are installed at the intermediate points of the push levers 48 ″ and 50 ″. According to the present embodiment, there is provided a configuration that enables to adjust the force for driving the bicycle in accordance with the user selection.

The technical scope of the present invention is applicable to not only a two-wheeled bicycle but also a tricycle or a four-bike, so the scope of the present invention is not limited to the illustrated two-bike.

According to the above configuration, the bicycle is provided to reduce the width of the driver's leg by allowing the pedal to reciprocate only within a certain angle range. In addition, there is provided a bicycle having a reciprocating pedal that allows the user to generate a rotational force so that the source of rotational force is adjacent to the driver's body so that even a small user can use it conveniently. There is also provided a bicycle capable of generating the desired torque with little force.

Claims (2)

delete A truss frame 2 having a seat 9 and a handle 18 at an upper portion thereof and wheels installed at the front and rear sides thereof; A drive sprocket wheel 26 installed at the bottom of the frame 2; A driven sprocket wheel 28 installed on the rear wheel hub and connected to the drive sprocket wheel 26 by a drive chain 32; A bicycle comprising a crankshaft (24) fitted in the center of said drive sprocket wheel (26) for transmitting torque to said drive sprocket wheel (26); A first sprocket wheel (34) coupled to one end of the crankshaft (24) to enable torque transmission to the drive sprocket wheel (26); A second sprocket wheel 36 coupled to the other end of the crankshaft 24 so as to transmit torque, and having a diameter equal to that of the first sprocket wheel 34; A bracket (38) fixed to the frame (2); It is installed symmetrically to the bracket 38 so as to be located between the crankshaft 24 and the seat 9, the first and second sprocket wheels (34, 36) by the first and second chain (44, 46) First and second ratchet wheels 40 and 42 interlocked with each other; First and second push levers 48 and 50 having one end connected to the first and second ratchet wheels 40 and 42 so that torque transmission is possible, and pedals 52 and 54 installed at the other end thereof, respectively; By including connecting means connected on said first and second push levers (48,50) to cause said first and second push levers (48,50) to reciprocate out of phase; When the pedals (52, 54) are alternately pressed, the drive sprocket wheel (26) is continuously driven by the first and second ratchet wheels (40, 42); The connecting means, the pulley (56) is installed on the top tube (4) or the bracket (38) of the frame; A bicycle having a reciprocating pedal, characterized in that both ends of the wire (58) is configured by being connected to the intermediate points of the first and second push levers (48, 50) via the pulley (56), respectively.

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