KR20030056939A - Power transmission device - Google Patents

Abstract

PURPOSE: A power transferring device is provided to simplify the structure by reducing a number of components, to easily climb a slope way by traveling a bicycle frontward though rotating a pedal in any directions and to devise the balanced development of leg muscles by rotating the pedal frontward and backward. CONSTITUTION: A crank bracket combines a crank with a pedal. A housing(3) has a multi-step crank gear for a chain driving and has a protruded combining portion(4) for the combination with a right one-way bearing(8). The right one-way bearing is inserted inside the combining portion of the housing. The right one-way bearing transfers power to the crank gear by rotating when the crank bearing is rotated frontward. An inverse one-way bearing(9) is inserted in the center of the housing to be positioned in one side of the right one-way bearing. The inverse one-way bearing is rotated when the crank bracket is driven inversely. A first washer gear(10) is combined with the outside of the inverse one-way bearing and formed with a gear portion(12). A second washer gear(11) is combined with the outside of the inverse one-way bearing and formed with a gear portion(12). The thickness of the second washer gear is thicker than the first washer gear. A power converting gear(13) comprises a large portion(14) having a medium gear portion(16) and a small portion(15) to be geared with the first and the second washer gears. The power transferring gear converts the inverse rotation of the inverse one-way bearing to be transferred through the first and the second washer gears to a frontward direction. A driving gear(5) is formed in the inner wall of the housing to be geared with the medium gear. A cap(6) is combined with the housing. Plural bolt holes(7) are formed in the cap. Plural power transferring gears are supported in the bolt holes through bolts. Thereby, a bicycle is driven frontward though a user rotates a pedal in any directions.

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, both forward and reverse rotation of the pedal are transmitted to the crank gear by the forward rotational force so that the user can rotate the pedal in any direction so that the bicycle travels 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,

Crank gear 100, the crank is coupled to the pedal is driven, the drive sprocket 101 is carried by the rear wheel of the bicycle and transmits the rotational force transmitted from the drive chain 103 to the rear wheel, and the lower side of the drive sprocket 101 Induction sprocket 102 formed in the, 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 to the right side on the drawing while rotating the driving sprocket 101 in the forward direction, so that the rear wheel rotates in the forward direction, and the bicycle is in the forward direction. Will be driving.

If the user rotates the pedal in the reverse direction, the driving chain 103 moves to the left side of the drawing while rotating the driving sprocket 101 in the reverse direction, and the driving 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 hard 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 crank gear by 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.In addition, the bicycle can be driven forward regardless of which direction the pedal is rotated. The purpose of the present invention is to provide a power transmission device for driving the pedal back and forth so as to facilitate the balanced development of the leg muscles by driving the bicycle while driving the pedal forward and backward.

The present invention for achieving the above object,

A crank symbol for coupling of 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 coupling part of the housing and rotating in the forward direction of the crank symbol inserted into the housing to transmit the power to the crank gear;

A reverse drive one-way bearing inserted in 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 a crank symbol inserted into the inside;

A first washer gear coupled to the outer shell of the reverse driving one-way bearing and having a gear portion formed on the outer circumferential surface thereof;

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

It consists of a large end and a small end having an intermediate gear part for engaging the gear part 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 engage with the large end gear of the power shift gear;

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

A plurality of bolt holes may be formed in the cap, and the plurality of power conversion gears may be stored in 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: crank symbol, 2: crank gear,

3: housing, 4: coupling,

5: drive gear, 6: cap,

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

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

12: gear part, 13: power shift gear,

14: large end, 15: small end,

16: intermediate gear, 17: bolt,

18: Bush,

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

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

The crank symbol (1) is inserted into the inner center and coupled, the power transmission device of the present invention for driving the chain with the driving force transmitted from the crank symbol (1) is a housing (3), the 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 driving gear 5 for engaging with the large end portion 14 intermediate gear 16 of the power conversion 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 crank symbol 1 rotates in the forward direction, and idles when the crank symbol 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 is rotated by its power only when the crank symbol 1 rotates in the reverse direction, and has a function of idling when the crank symbol 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 crank symbol 1 is inserted between the control rings 8 and 9 in a state in which the forward driving one-way bearing 8 and the reverse driving one-way bearing 8 are installed in the housing 3, and each bearing ( 8, 9 and the crank symbol (1) is coupled to each other as a separate clip.

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. Is moistened by.

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

In addition, since the other end of the medium gear 16 of the large end portion 14 is engaged with the drive gear 5 of the housing 3 again, the reverse rotation transmitted from the reverse driving one-way bearing 9 is a power change gear ( 13) is reversed in the forward direction and transmitted to the drive gear (5), even if the crank symbol 1 rotates in the reverse direction, the bicycle is traveling forward.

Reference numeral 6 denotes a cap for sealing one side of the housing 3, the cap 6 is formed with a plurality of bolt holes (7).

The bolt hole 7 is a bolt 17 is inserted into the shaft 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 crank symbol 1 rotates clockwise.

When the crank symbol 1 rotates in the forward direction, the reverse drive one-way bearing 9 rotates while the forward drive one-way bearing 8 rotates in the same direction as the crank symbol 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 crank symbol 1 rotates counterclockwise.

When the crank symbol 1 rotates in the reverse direction, the forward driving one-way bearing 8 rotates while the reverse driving one-way bearing 9 rotates in the same direction as the crank symbol 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 are rotated in the reverse direction, the intermediate gear 16 of the large end portion 14 and the small end portion 15 is connected to the gear portions 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 large end 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 which 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 even if the pedal is rotated in any direction, the bicycle runs forward, making it easier to climb the ramp 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)

Crank symbol (1) for coupling 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; Forward driving one-way bearing 8 is inserted into the coupling portion 4 of the housing 3, and rotates during forward driving of the crank symbol 1 inserted therein to transmit 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 at one side of the forward drive one-way bearing (8) and rotating during reverse driving of the crank symbol (1) inserted therein; A first washer gear (10) coupled to the outer shell of the reverse driving one-way bearing (9) and having a gear portion (12) formed on the outer circumferential surface thereof; A second washer gear (11) coupled to the outer shell of the reverse driving one-way bearing (9) and having a gear portion (12) formed on the outer circumferential surface thereof, the thickness of which is larger than the first washer gear (10); It consists of a large end portion 14 and a small end portion 15 in which the intermediate gear portion 16 for engaging the gear portion 12 of the first and second washer gears 10 and 11 is formed. 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 the inner wall surface of the housing (3) to be engaged with the large end (14) medium 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 held in the bolt holes (7) using bolts (17). Power train for forward and backward drive of the pedals.