TWI439393B - Bicycle including hub capable of transmission power at both sides - Google Patents

Description

Bicycle with power transmission hubs on both sides

The present invention relates to a bicycle, and more particularly to a bicycle that can rotate both side hub gears at the same time per minute for the same rotation, so that the left and right pedals can be continuously driven, wherein a pedal shaft is divided into right and left. component.

Referring now to Figure 1, a bicycle typically includes a power transmission unit (100) that uses a chain. When the bicycle rider turns the pedal, the rotational force of a pedal gear can be transmitted to the hub gear of the rear wheel through the chain, and the front wheel rotates together with the rear wheel to advance the bicycle.

The power transfer unit (100) will now be described with reference to FIG. 2. The power transmission unit (100) includes an integrated pedal set (113), wherein the opposite pedal (112) is coupled to a single pedal shaft (111); a pedal gear (114) coupled to the pedal shaft (111); a hub (120), through which a rear axle passes and connects the spokes of the rear wheel, a hub gear (130) coupled to the hub (120), and a chain (140) for power transmission. Similarly, a typical bicycle includes two pedals disposed on opposite sides and is directly coupled to a single pedal shaft (111).

3 is a schematic exploded perspective view of a conventional bicycle, FIG. 4 is an exploded perspective view of the hub (120), and FIG. 5 is a detailed exploded perspective view of the hub (120).

Referring to Figures 3 and 4, the hub (120) generally includes a hub housing (122) in which a spoke of a rear wheel is coupled and a hub securing shaft (121) is passed therethrough; a ratchet (130) It is fastened to one side of the hub housing (122); and a conical nut (124) that secures the hub housing (122) to the hub securing shaft (121).

Further, the ratchet (130) includes: a rod wheel (131) having a rod (132) at its outer periphery; a sprocket (133) having a stalk gear (133a) formed at the inner periphery and engaging the rod (132) a unidirectional transmission power; and a sprocket (133b) that forms and engages the chain around the outer circumference; and a wheel cover (134) that secures the rod wheel after the pole wheel (131) is mounted on the sprocket (133) ( 131) with the sprocket (133).

This conventional bicycle often happens to be out of gear or broken chain, so that failure and energy loss occur in the transmission of the rotational force of the chain.

Since the pedal gear is disposed on one side of the bicycle, the conventional bicycle has a long power transmission path between a pedal gear and a hub gear. Therefore, energy loss occurs when the rotational force is transmitted through the chain.

In addition, the chain is often separated from the gear or the cutting, so that malfunctions often occur.

Moreover, since a pair of pedals are coupled to a single pedal gear, a pedal shaft must be disposed within the radius of the rear wheel.

The present invention is directed to solving the problems of the related art, and an aspect of the present invention is to provide a bicycle having a hub such that the hub gears on the opposite side can rotate simultaneously at the same time every minute, so that the pedal shaft divided into one of the right and left members can be used. To continuously drive the right and left pedals.

According to one aspect of the present invention, a bicycle includes: a hub for transmitting power on both sides of the bicycle, wherein the hub includes a rotating shaft including at least one rod (disposed around the outer circumference) and a pair of hub gears (which is coupled to or formed entirely on both sides); and a hub housing through which the rotating shaft passes Pass and connect the spokes of a rear wheel. The hub housing includes a stalk gear that is formed around the interior and that engages the rod for power transmission such that the pair of hub gears can rotate simultaneously at the same time every minute.

The bicycle may include: a pair of pedal gears disposed on both sides of a frame; a pair of pedals coupled to the pedal gears; and a pair of power transmission units respectively transmitting rotational forces of the pedal gears to the hub gear.

The power transmission unit may include at least one idle gear disposed between the pedal gear and the hub gear.

The power transmission unit can include a chain.

The pedal shaft can be disposed within the radius of the rear wheel.

In accordance with an exemplary embodiment of the present invention, a bicycle includes a pedal gear and a hub gear on opposite sides of a rear wheel and is driven by a rotating gear.

Therefore, a pedal shaft is divided into right and left members, and is disposed close to the rear wheel, thereby improving power transmission performance.

In particular, since the hub gears on the opposite sides of the bicycle are simultaneously rotated with the same rotation per minute, the right and left pedals can be continuously driven even if the pedal gears are provided on the right and left sides, respectively.

In addition, the bicycle is shorter in length than conventional bicycles, thus reducing weight, thereby making maintenance and transportation more convenient.

Exemplary embodiments of the present invention will now be described in detail with reference to the drawings. It is to be understood that the following specific examples are merely illustrative and are not intended to limit the invention.

6 to 8, a bicycle according to an exemplary embodiment of the present invention includes a front wheel, a rear wheel, a car skeleton, a mat, and a power transmission unit (1).

The power transmission unit (1) includes a pedal group (10) including: a pair of pedals (12) respectively provided to the right and left sides of the rear wheel; and a pair of pedal gears (20) coupled to one of the pedal gears a pedal shaft (11); a pair of hub gears (30) fixed to a central shaft (hub fixed shaft) (61) of the rear wheel; and a pair of idle gears (40) each of which is disposed on the pedal gear (20) Between the hub gear (30), the pedal gear (20) and the hub gear (30) are rotatable in the same direction.

Each of the idler gears (40) is formed on a side wall on the opposite side of the gear teeth. The idler gear (40) will engage a corresponding pedal gear (20) in the side wall, or a corresponding hub gear (30). The sidewalls are provided to prevent the pedal gear (20), the idler gear (40), and the hub gear (30) from losing each other, thereby ensuring a stable engagement therebetween. Alternatively, although not shown in the figures, the side walls are formed on the opposite sides of the gear teeth of the pedal gear and the hub gear, rather than being formed in the idler gear, thereby providing the same effect.

Each of the idler gears (40) is fixed to the center of the vehicle frame.

With this configuration, when one of the pedals 12 is pushed, the corresponding pedal gear (20) will rotate, and the rotational force of the pedal gear (20) will be transmitted to the rear wheel via the idler gear (40) and the hub gear (30). This turns the rear wheel.

Specifically, in this particular embodiment, the pedal shaft (11) (at the center of the pedal gear) is mounted within the radius of the rear wheel. It is generally known that the pedal shaft (11) is placed closer to the center of the rear wheel for faster response to improved power transmission performance. According to the present invention, since the pedal shaft (11) is divided into right and left members, the pedal shaft (11) can be mounted closer to the center of the rear wheel. Therefore, the power transmission distance is significantly reduced, thereby reducing power loss.

According to this embodiment, when the right and left pedals (12) are pushed, the rotational force will It is transmitted to the hub gear (30) which is respectively disposed on the opposite side of the bicycle. Therefore, in order to move the bicycle according to this embodiment, it is important for the hub to rotate the rear wheel, while the rotational forces generated by the rotation of the pedals (12) on the opposite side of the bicycle are allowed to work complementarily, but not against each other. In particular, since the hub gears (30) are provided to the left and right sides of the rear wheels, respectively, the hub configuration allows the hub gears (30) to rotate with the same rotation per minute. When the rotations of the two hub gears (30) do not match each other, the right and left pedals (12) do not continue to alternately push. For example, the hub is configured to allow the left and right hub gears (30) to rotate simultaneously with the same rotation per minute when pushing the left pedal (12).

Figure 9 is an exploded perspective view schematically illustrating an assembly hub (60) in accordance with an embodiment of the present invention; Figure 10 is an exploded perspective view of the hub (60); and Figure 11 is a detailed exploded perspective view of the hub (60). Referring now to Figures 9 through 11, a hub (60) according to a particular embodiment includes a hub securing shaft (61), a hub housing (63), and a rotating shaft (62).

The hub housing (63) includes an edge (63b) formed on the opposite side and coupled to the spokes (50) of the rear wheel; and a stalk gear (63a) formed on the inner periphery.

The rotating shaft (62) extends through the hub housing (63) and includes at least one rod (62c) provided at the outer periphery. Specifically, the rod (62c) is disposed in a seat groove (62b) formed on the outer periphery of the rotating shaft (62), and is elastically supported by a round wire spring (62d) to protrude from the groove. The rod (62c) is a bite stalk gear (63a) that rotates the hub shell (63) in one direction.

The rotating shaft (62) includes edges (62a) formed on opposite sides, each edge being fastened to each hub gear (30). Therefore, the hub gears (30) on both sides of the rear wheel can rotate in synchronization with each other. Further, the pair of hub gears (30) may be integrally formed with the opposite side of the rotating shaft (62).

When the rotating shaft (62) is assembled in the hub shell (63), one of the edges (62a) is separated from the rotating shaft (62), and the other edge is coupled thereto, thereby making it easier to see through The rotating shaft (62) is assembled through the hub housing (63).

Further, a hub fixing shaft (61) fixed to the bicycle frame is inserted into the rotating shaft (62), and the hub (60) further includes a tapered nut (64) for fixing the rotating shaft (62) to the hub fixing shaft (61). ).

To facilitate rotation, the bearing (B) is provided between the rotating shaft (62) and the hub housing (63), and between the rotating shaft (62) and the tapered nut (64).

Referring to FIG. 11, in order to drive the hub housing (63), a rotating shaft (62) coupled to the hub gear (30) is disposed between the hub housing (63) and the hub fixing shaft (61); thus, two The hub gear (30) can rotate simultaneously with the same rotation per minute. Therefore, the pedal gears of the right and left sides of the bicycle are also rotated at the same rotation every minute, and the pedals (12) on the opposite sides are arranged at 180 degrees to each other, thereby causing the bicycle rider to push the pedal.

Likewise, bicycles in accordance with embodiments of the present invention may use a smaller number of gears as power transmission performance when using a gear that is individually configured with no chains on the right and left sides of the bicycle to drive the bicycle. In addition, the bicycle includes a power transmission unit (1) having a hub (60) configured to rotate at the same time per minute to rotate the teeth disposed on both sides of the bicycle to drive the bicycle.

Alternatively, a plurality of idler gears are available. That is, an odd number of idler gears can be provided so that the pedal gear and the hub gear can rotate in the same direction. Alternatively, an even number of idler gears may be provided such that the pedal and hub gears are rotatable in opposite directions and the rear wheels are then transmitted in the same direction as the pedal gears.

Figure 12 illustrates schematically a bicycle in accordance with another embodiment of the present invention. In contrast to the particular embodiment illustrated in Figure 7, the chain (70) is provided as a power transmission unit rather than the idler gear (40) of Figure 7. According to the present invention, since the pedal shaft (11) is divided into two members disposed on the opposite sides, the pedal shaft (11) can be mounted closer to the center of the rear wheel so that a shorter chain can be used.

B‧‧‧ bearing

1‧‧‧Power transmission unit

10‧‧‧ pedal group

11‧‧‧ pedal shaft

12‧‧‧ pedal

20‧‧‧ pedal gear

30‧‧· Hub Gears

40‧‧‧Idle gear

50‧‧‧ spokes

60‧‧·wheels

61‧‧·Wheel fixed shaft

62‧‧‧Rotary axis

62a‧‧‧ edge

62b‧‧‧Slot

62c‧‧‧ pole

62d‧‧‧round spring

63‧‧·Wheel shell

63a‧‧‧Stalk gear

63b‧‧‧ edge

64‧‧‧Conical nuts

70‧‧‧Chain

100‧‧‧Power transmission unit

111‧‧‧ single pedal shaft

112‧‧‧ pedal

113‧‧‧ pedal group

114‧‧‧ pedal gear

120‧‧·wheels

121‧‧·Wheel fixed axle

122‧‧·Wheel shell

124‧‧‧Conical Nuts

130‧‧· Hub Gears

131‧‧‧ rod wheel

132‧‧‧ pole

134‧‧‧ wheel cover

133‧‧‧Sprocket

133a‧‧‧Stalk gear

133b‧‧‧ sprocket

140‧‧‧Chain

The above and other aspects, features, and advantages of the present invention will become more apparent from the detailed description of exemplary embodiments illustrated in the accompanying drawings in which: FIG. Figure 3 to 5 are partial cross-sectional perspective views of a conventional bicycle hub; Figure 6 is a perspective view of a bicycle according to an exemplary embodiment of the present invention; Figures 7 and 8 are bicycles of Figure 6 FIG. 9 to FIG. 11 are side views of the bicycle hub of FIG. 6; and FIG. 12 is a partially cutaway perspective view of the bicycle according to another exemplary embodiment of the present invention.

1‧‧‧Power transmission unit

10‧‧‧ pedal group

11‧‧‧ pedal shaft

12‧‧‧ pedal

20‧‧‧ pedal gear

30‧‧· Hub Gears

40‧‧‧Idle gear

50‧‧‧ spokes

60‧‧·wheels

Claims (5)

A bicycle having power transmission hubs on both sides, wherein the hub includes a rotating shaft, the rotating shaft includes: at least one rod disposed at an outer circumference, two edges formed on opposite sides, and a pair of hub gears, the two edges respectively Rotating to the pair of hub gears; and a hub housing extending through the hub housing and connecting a spoke of a rear wheel, the hub housing including a stalk gear formed around the inner portion and engaging the rod In order to transmit power, the pair of hub gears can be rotated simultaneously with the same rotation per minute. The bicycle of claim 1, wherein the bicycle includes a pair of pedal gears disposed on both sides of the frame of the vehicle; a pair of pedals coupled to the pedal gears; and a pair of power transmission units, The hub gear is transmitted to the rotational force of the pedal gears, respectively. The bicycle of claim 2, wherein the power transmission unit includes at least one idler gear disposed between the pedal gear and the hub gear. The bicycle of claim 2, wherein the power transmission unit comprises a chain. The bicycle of claim 3, wherein the pedal shaft is disposed within a radius of the rear wheel.