KR200282587Y1 - Power transmission device - Google Patents

Abstract

The present invention relates to a power transmission device for driving the front and rear of the pedal, and in particular, the forward and reverse rotation of the pedal is transmitted to the crank gear by the forward rotation force so that the user can rotate the pedal in any direction to rotate the bicycle forward Configure the power train, but simplify the structure by reducing the number of parts in the power train, which can improve the productivity of the product and reduce the failure rate.Allow the bike to run forward in any direction. Therefore, it becomes easier to climb a ramp using a bicycle, and relates to a power transmission device for driving the front and rear of a pedal to achieve a balanced development of leg muscles by driving the bicycle while driving the pedal forward and reverse.

Description

Power transmission device for forward and backward driving of pedals

The present invention relates to a power transmission device for driving the front and rear of the pedal, and in particular, the forward and reverse rotation of the pedal is transmitted to the crank gear by the forward rotation force so that the user can rotate the pedal in any direction to rotate the bicycle forward Configure the power train, but simplify the structure by reducing the number of parts in the power train. Through this, you can expect to improve the productivity of the product and to reduce the failure rate. Therefore, it becomes easier to climb a ramp using a bicycle, and relates to a power transmission device for driving the front and rear of a pedal to achieve a balanced development of leg muscles by driving the bicycle while driving the pedal forward and reverse.

1 illustrates a power transmission structure of a conventional bicycle,

The crank gear 100 is coupled to the crank shaft coupled to the pedal, the drive sprocket 101 is axially coupled to the rear wheel of the bicycle to transfer the rotational force transmitted from the drive chain 103 to the rear wheel, and the drive sprocket 101 Induction sprocket 102 is formed on the lower side, and the crank gear 100, including the drive sprocket 101, the drive chain 103 for interconnecting the induction sprocket 102.

In the conventional power transmission structure of the bicycle, when the user presses the pedal in the forward direction (clockwise), the driving chain 103 moves downward in the drawing while rotating the driving sprocket 101 in the forward direction so that the rear wheel also rotates in the forward direction so that the bicycle is in the forward direction. Will be driving.

If the user rotates the pedal in the reverse direction, the drive chain 103 moves upward in the drawing while rotating the drive sprocket 101 in the reverse direction. At this time, the drive sprocket 101 does not transmit power to the wheel while idling. Will not.

That is, the conventional bicycle power transmission structure is configured such that the bicycle runs forward only when the user rotates the pedal in the forward direction.

However, the conventional bicycle power transmission structure is very difficult when climbing the ramp as the bicycle is running in the forward direction only when the user presses the pedal forward, and the pedal muscle is pressed down only in one direction. There was a problem that the development is not equal.

Accordingly, the present invention for solving the above problems is to configure the power transmission device for transmitting the forward and reverse rotation of the pedal to the crankgear with the forward rotational force so that the user can move the bicycle forward in any direction. By reducing the number of parts in the power train, the structure can be simplified, and the productivity can be improved and the failure rate can be expected. Also, the bicycle can be driven forward in any direction by rotating the pedals. The purpose of the present invention is to provide a power transmission device for the front and rear driving of the pedal to facilitate the development of the balance of the leg muscles by driving the bicycle while driving the pedal forward and reverse.

The present invention for achieving the above object,

A crank shaft for engaging the crank to which the pedal is coupled;

A housing having a multi-stage crank gear for chain driving to the outside and a protruding portion for engaging the forward driving one-way bearing at one inner end thereof;

A forward drive one-way bearing inserted into the engaging portion of the housing and rotating during forward driving of the crankshaft inserted into the housing to transmit the power to the crank gear;

A reverse drive one-way bearing inserted into the center of the housing so as to be located at one side of the forward drive one-way bearing and rotating during reverse driving of the crankshaft inserted therein;

A first washer gear coupled to an outer circumferential surface of the reverse driving unidirectional bearing and having a gear portion formed on its outer circumferential surface;

A second washer gear coupled to the outer circumferential surface of the reverse drive unidirectional bearing and having a gear portion formed on the outer circumferential surface thereof, the thickness of which is larger than the first washer gear;

It consists of a standby gear part and a small gear part having an intermediate gear part for engaging the gear parts of the first and second washer gears, and the reverse rotation of the reverse drive one-way bearings transmitted through the first and second washer gears in the forward direction. A power conversion gear for switching to;

A drive gear formed on an inner wall surface of the housing so as to be engaged with the standby gear intermediate gear of the power conversion gear;

A cap coupled to one side of the housing; Characterized in that consisting of.

A plurality of bolt holes are formed in the cap, and the plurality of power conversion gears are axially coupled to the bolt holes using bolts.

1 is a view showing a conventional bicycle.

Figure 2 is an exploded perspective view showing a power transmission device of the present invention.

Figure 3 is a cross-sectional view showing a state in which the power transmission device of the present invention is coupled.

4 is a cross-sectional view taken along the line B-B in FIG. 3 as a view for explaining the operation during forward driving.

5 is a cross-sectional view taken along the line A-A of FIG. 3 as a view for explaining the operation during the reverse driving.

Explanation of symbols for main parts of the drawings

1: crankshaft, 2: crank gear,

3: housing, 4: coupling,

5: drive gear, 6: cap,

7: bolt hole, 8: one-way bearing,

9: reverse acting one-way bearing, 10,11: washer gear,

12: gear part, 13: power shift gear,

14: fisherman, 15: fisherman,

16: intermediate gear, 17: bolt,

18: bush,

Hereinafter, with reference to the accompanying drawings 2 to 5 will be described a preferred embodiment of the present invention.

Reference numeral 1 denotes a crank shaft, and both sides of the crank shaft 1 are coupled with cranks to which pedals are coupled at their ends.

The crankshaft (1) is inserted into the inner center and coupled, and the power transmission device of the present invention for driving the chain with a driving force transmitted from the crankshaft (1) is a housing (3), a forward drive one-way bearing (8), reverse It consists of a driving one-way bearing 9 and a power switching gear 13 roughly.

The housing (3) is equipped with various components therein. On the outer circumferential surface, multi-stage crank gears (2) for driving the chain are formed to protrude outward at regular intervals, and at one inner end of the housing (3). Coupling portion 4 for engagement of the forward driving one-way bearing 8 is formed to protrude.

In addition, on the inner circumferential surface of the housing 3, a drive gear 5 for engaging the intermediate gear 16 of the standby gear portion 14 of the power switching gear 13 to be installed is protruded.

The forward drive one-way bearing 8 transmits its power to the housing 3 through the coupling part 4 only when the crankshaft 1 rotates in the forward direction, and idles when the crankshaft 1 rotates in the reverse direction. As shown in FIG. 3, the inner side of the coupling portion 4 is coupled to the coupling portion 4.

The reverse drive one-way bearing 9 rotates by its power only when the crankshaft 1 rotates in the reverse direction, and has a function of idling when the crankshaft 1 rotates in the forward direction, as shown in FIG. As described above, the ball is installed in parallel with the one-way bearing 8.

That is, the crankshaft 1 is inserted between the control rings 8 and 9 in a state in which the forward drive one-way bearing 8 and the reverse drive one-way bearing 8 are installed inside the housing 3, and each bearing ( 8, 9 and the crankshaft 1 are mutually coupled as separate clips.

Outside the reverse drive one-way bearing 9, the first and second washer gears 10 and 11 for transmitting the power of the reverse drive one-way bearing 9 to the power conversion gear 13 are coupled, respectively. The thickness of the second washer gear 11 is greater than the thickness of the first washer gear 10, and the gear part 12 is formed on the outer circumferential surface of each washer gear 10, 11.

The washer gears 10 and 11 and the reverse drive one-way bearing 9 are also coupled to each other by a separate clip, not shown.

The power conversion gear 13 converts the reverse rotation transmitted from the reverse driving one-way bearing 9 into the forward rotation, and is connected to the bolt 17 between the washer gears 10 and 11 and the housing 3. By axial coupling.

The power conversion gear 13 has a standby gear portion 14 and a small gear portion 15, as shown in Figs. 2 and 4, on the outer peripheral surface of each of the standby gear portion 14 and the small gear portion 15, respectively. Each intermediate gear 16 is formed, and the intermediate gear 16 of the small gear part 15 meshes with the second washer gear 11, and the intermediate gear 16 of the standby gear part 14 is the first washer gear. Meshes with (10).

In addition, the intermediate gear 16 of the standby gear unit 14 is engaged with the driving gear 5 of the housing 3 again, so that the reverse rotation transmitted from the reverse driving one-way bearing 9 is the power switching gear ( 13) is reversed in the forward direction and transmitted to the drive gear (5), even if the crankshaft (1) rotates in the reverse direction the bicycle is to move forward.

Reference numeral 6 denotes a cap for sealing one side of the housing 3, in which a plurality of bolt holes 7 are formed.

The bolt hole 7 is a bolt 17 is inserted and axially coupled when the power conversion gear 13 is installed in the housing 3, the reference numeral 18 denotes a bush.

Referring to the operation of the present invention configured as described above is as follows.

When the user presses the pedal in the forward direction (right side in the drawing), the crankshaft 1 rotates clockwise.

When the crankshaft 1 rotates in the forward direction, the reverse drive one-way bearing 9 is idle while the forward drive one-way bearing 8 rotates in the same direction as the crankshaft 1, that is, in the forward direction, The rotational force of the forward driving one-way bearing 8 is transmitted to the housing 3 through the engaging portion 4 so that the housing 3 rotates in the forward direction, and a crank gear formed on the outer circumferential surface of the housing 3. As the 2) drives the chain in the forward direction, the bicycle will run forward.

On the other hand, when the pedal is pressed in the reverse direction (left side in the drawing), the crankshaft 1 rotates counterclockwise.

When the crankshaft 1 rotates in the reverse direction, the forward drive one-way bearing 8 rotates while the reverse drive one-way bearing 9 rotates in the same direction as the crankshaft 1, that is, in the reverse direction. Accordingly, the first and second washer gears 10 and 11 engaged on the outer circumferential surface of the reverse drive unidirectional bearing 9 rotate in the reverse direction.

As the first and second washer gears 10 and 11 rotate in the opposite directions, the intermediate gear 16 of the standby gear part 14 and the small gear part 15 is connected to the gear part of the washer gears 10 and 11. As the power conversion gear 13 engaged with 12) rotates, the reverse rotation of the reverse one-way bearing 9 is reversed in the forward direction.

The rotational force reversed by the power shift gear 13 is transmitted to the housing 3 by the drive gear 5 engaged with the intermediate gear 16 of the standby gear portion 14, so that the user presses the pedal in the reverse direction. Even if the bicycle is driving.

As described above, the present invention constitutes a power transmission device that transmits both the forward rotation and the reverse rotation of the pedal to the crank gear by the forward rotational force so that the user can move the bicycle forward in any direction. Simplify the structure by reducing the number of parts of the product, thereby improving the productivity of the product and reducing the failure rate can be expected, and it is easier to climb the ramp using the bicycle because the bicycle is moving forward in any direction to rotate the pedal As the bicycle is driven while the pedal is rotated forward and backward, the effect of providing a power transmission device for the forward and backward driving of the pedal can be expected to achieve the balanced development of the leg muscles.

Claims (2)

A crankshaft (1) for engaging the crank to which the pedal is coupled; A housing (3) having a multi-stage crank gear (2) for driving the chain outwardly and protruding a coupling portion (4) for engagement of the forward driving one-way bearing (8) at one end thereof; The forward driving one-way bearing 8 is inserted into the coupling portion 4 of the housing 3 and rotates during forward driving of the crankshaft 1 inserted thereinto, and transmits the power to the crank gear 2. and; A reverse drive one-way bearing (9) inserted into the center of the housing (3) so as to be located on one side of the forward drive one-way bearing (8) and rotating during reverse driving of the crankshaft (1) inserted therein; A first washer gear (10) coupled to the outer circumferential surface of the reverse driving one-way bearing (9) and having a gear portion (12) formed on its outer circumferential surface; A second washer gear 11 coupled to the outer circumferential surface of the reverse drive unidirectional bearing 9 and having a gear portion 12 formed on its outer circumferential surface, the thickness of which is greater than that of the first washer gear 10; ; The first and second washer gears 10 and 11 are composed of a standby gear portion 14 and a small gear portion 15 having a medium gear portion 16 for engaging with the gear portion 12, the first gear And a power conversion gear 13 for converting the reverse rotation of the reverse driving one-way bearing 9 transmitted through the second washer gears 10 and 11 in the forward direction. A drive gear (5) formed on an inner wall surface of the housing (3) so as to engage with the air gear (14) intermediate gear (16) of the power shift gear (13); A cap 6 coupled to one side of the housing 3; Power transmission device for the front and rear drive of the pedal, characterized in that consisting of. The method of claim 1, wherein a plurality of bolt holes (7) are formed in the cap (6), and the plurality of power conversion gears (13) are axially coupled to the bolt holes (7) using bolts (17). Power train for forward and backward drive of pedals.