KR100983985B1 - Transmission for bicycle - Google Patents

Abstract

The present invention is to improve the structure of the transmission mechanism applied to the speed conversion device of the bicycle to be able to select the gear stage regardless of the speed while minimizing the impact during the shift operation.
The transmission of the present invention includes a crank arm that receives a rotational driving force from a rotatable bicycle pedal and transmits the rotational driving force to the main shaft side, and a transmission gear unit for shifting the rotational force transmitted to the main shaft at a number ratio of gear teeth according to the selected gear stage. According to the operation of the shift lever, a lever operating unit for selecting one shifting stage of the shifting gear unit to operate one of the respective cables connected to the respective shifting stages, and one cable selected to the lever operating unit It is composed of a clutching means for operating one of the ring gears of the shifting gear portion by the gear engaging engagement to operate the shifting operation of the shifting gear portion.
According to the present invention, when the bicycle shifting operation is selected, one of the plurality of ring gears is selected through the selected cable and the clutching means, so that the shifting operation is made smooth by gear engagement coupling, thereby minimizing the shifting shock, Irrespective of the user's choice of any gear, the user can immediately respond even when the vehicle is stopped.

Description

Gearshift for Bicycles {TRANSMISSION FOR BICYCLE}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bicycle transmission, and more particularly, to a bicycle transmission having an improved structure so as to freely select a shift regardless of a speed of a pedal and to minimize a shift shock during a shift.

In general, a conventional bicycle has a fixed crankshaft distance between the pedal shaft and the pedal to provide a driving force only by the driving force of the pedal coupled to the crankshaft.

Such a driving structure of the existing bicycle (driving force providing structure), since the rotational force of the pedal from the pedal shaft is made within a certain radius of rotation, in particular, more driving energy, of course, requires more driving energy.

In order to improve this, it is most common to install transmission gears to maximize driving energy in order to obtain more reasonable driving energy.

However, since the rotation radius of the pedal, which is also the driving force of the driving force, is constant, the same driving energy is always provided, and therefore, the development of a transmission device capable of maximizing the driving force with less driving energy consumption by varying the rotation radius of the pedal is required. do.

To this end, the bicycle is equipped with a speed converter.

However, the conventional bicycle speed converter has a sequential shifting section, so if you start again after stopping in the high speed shift mode, it is difficult to travel when the shift gear is not converted to the lower stage.

In addition, there are not only shift shocks when shifting the transmission, but particularly, impacts when shifting a high stage are large.

SUMMARY OF THE INVENTION An object of the present invention is to improve the structure of a transmission so as to fix a ring gear selected by a gear engaging engagement so as to operate a shifting operation of a shifting gear unit, thereby prompting the user to immediately respond at a desired shift ratio regardless of the speed of the operation pedal. The present invention provides a bicycle transmission with improved response.

The present invention for achieving the above object and the main shaft is connected via the pedal and the crank arm of the bicycle,

A shift gear unit configured to receive a driving force transmitted from the main shaft in a plurality of shift stages interlocked with the main shaft in parallel;

A lever operation unit for operating one of the respective cables connected to each of the shift stages by selecting one of the shift stages of the shift gear unit according to an operation of the shift lever;

It is characterized by having a clutching means for operating the shifting operation of the shifting gear portion by operating by one cable selected by the lever operation unit to fix one of the gears of the gears in the gear shifting engagement.

The clutching means are toothed gear teeth are formed on the outer circumferential surface of the ring gears of the transmission gear,

And a pawl member interlocked with the interlocking means according to the movement of the selected cable and interfering with one of the gears to fix the ring gear.

The interlocking means may include a rotating shaft rotatably coupled with the pole member;

And a connection spring member disposed between the end of the cable and the pole member to return the pole member back to its original position after the operation of the cable is completed.

The interlocking means may include a rotating shaft rotatably coupled with the pole member;

And a clutch ring member disposed between the end of the cable and the pole member and interlocked according to the movement of the cable to adjust an interference operation with the ring gear for each contacted portion with the pole member.

The shift gear unit is a planetary gear carrier which is splined and interlocked with the main shaft;

A plurality of planetary gears which are pin-coupled to the planetary gear carrier and interlocked and arranged in parallel;

A plurality of ring gears disposed in parallel to correspond to the planetary gears, the gear teeth being formed to engage with the gears of the planetary gears on an inner circumferential surface thereof;

And a sun gear and a sun gear shaft for outputting a driving force shifted with respect to the rotational driving force of the main shaft to the outside when one of the ring gears is fixed by the clutching means.

The lever operating portion is arranged so that the upper portion is projected to the upper side of the housing and the lower portion is received in the interior of the housing, the shift lever is movable in the front, rear and left, right directions,

A plurality of operation levers which are rotated while interfering with a part of the shift lever in accordance with a forward and backward shift operation of the shift lever to tension the cable, and are arranged in parallel with the same number of shift stages of the shift gear unit;

A shift spring member disposed below the shift lever to elastically support forward and backward movement;

And a return spring member disposed below the operation lever to elastically support a return operation of the operation lever.

Further provided with a power transmission unit for transmitting the driving force of the motor to the speed change side of the transmission gear portion selected through the clutching means,

The power transmission unit is coupled to interlock with the rotor side of the motor disposed on one side of the case surrounding the transmission gear unit, an auxiliary sun gear shaft having an auxiliary sun gear disposed on one outer peripheral surface;

Auxiliary planetary gears meshed with the auxiliary sun gear and pin-coupled to an inner surface of the case;

A planetary gear carrier cover which is gear-engaged and coupled to the auxiliary planetary gear and connected to a planetary gear fixing pin axially connected to the planetary gears;

It is provided with a one-way clutch portion for transmitting the rotational force of the motor and the rotational force of the main shaft in each direction.

The present invention is to improve the structure of the transmission mechanism applied to the speed conversion device of the bicycle to be able to select the gear stage regardless of the speed while minimizing the impact generated in the process of clutching the gear during the shift operation. According to the present invention, when the gear shifting operation of the bicycle shift lever is performed by gear-locking the selected ring gear via the selected cable and the clutching means, the shifting operation of the shift stage is made smoothly, and the shift shock can be minimized, and the driving Regardless of the speed, the user can select any shift stage that he / she wants, and thus can respond immediately even when the vehicle is stopped.

1 is a block diagram showing an embodiment of a transmission for a bicycle according to the present invention.
2 is a view showing the configuration of the operation lever portion of the present invention.
3 is a plan view showing the present invention the shift lever and the housing.
Figure 4 is a state of use of the operation lever unit of the present invention.
Figure 5 is a plan view showing a shift operation of the shift lever of the present invention.
Figure 6 is a side view showing the operation lever portion of the present invention.
7 is a configuration diagram showing an example of the clutching means of the present invention.
8 is a state diagram used in the clutching means of the present invention.
9 is a configuration diagram showing another example of the use of the clutching means of the present invention.
10 is a state diagram used in FIG.
11 is a configuration diagram showing another embodiment of the present invention, the shift gear unit.
12 is a configuration diagram showing another embodiment of the present invention, the transmission gear portion.
Figure 13 is a front view showing a first clutch portion of the present invention.
14 is a front view showing a second clutch portion of the present invention.
Figure 15 is a use state showing another embodiment of the present invention the power transmission.
Figure 16 is a block diagram showing another embodiment of the present invention interlocking means.
17 is a state diagram used in FIG.
18 is a configuration diagram showing a modification of another embodiment of the present invention interlocking means.
19 is a state diagram used in FIG.
20 is a configuration diagram showing another embodiment of the present invention interlocking means.
21 is a state diagram used in FIG.

Recently, gears with different diameters are constructed on the shafts of the front and rear wheels, and are installed inside the rear wheel hub of the bicycle, in addition to the general speed converter which changes speed by changing the position of the power-carrying chain between these gears. The speed conversion device is developed and used, which is to arrange the small gears in the hub shell to convert the speed by the ratio of the number of gear teeth.

The shift mechanism of the speed converter has a shifting shock during shifting operation, and it is troublesome to operate a shifting stage suitable for the driving speed of the bicycle.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

According to an aspect of the present invention, a bicycle transmission includes a crank arm that receives a rotational driving force from a rotatable bicycle pedal and transmits the rotational driving force to the main shaft, and a transmission gear unit configured to shift the rotational force transmitted to the main shaft at a ratio of the number of gear teeth according to the selected shift stage. A lever operating unit for selecting one shifting stage among the shifting stages of the shifting gear unit and operating one of the respective cables connected to the respective shifting stages according to the operation of the shifting lever, and one cable selected to the lever operating unit. It is operated by means of the clutching means for manipulating the shifting operation of the shifting gear portion by fixing one of the ring gears of the shifting gear portion to the engagement engagement.

An embodiment of a bicycle transmission according to the present invention will be described with reference to FIGS. 1 to 8, the structure of which is rotated by receiving a rotation driving force of the bicycle pedal 10 via a crank arm 20. A shift gear unit in which the main shaft 100, the shift gear unit axially coupled to the main shaft 100, and the shift stages in which the respective shift gears are arranged in parallel are arranged in parallel, and the shift stage of the shift gear unit are selected. By operating a lever operation unit for operating one of the respective cables 500 connected to the respective shift stages, and operation of the shift stage connected to the selected cable 500 when the cable 500 of the lever operation unit is operated. Optionally provided with clutching means for manipulating the transmission gear portion.

In more detail, the transmission gear unit is coupled to the planetary gear carrier 210 and the planetary gear carrier 210 and the planetary gear fixing pin 220a which are rotated in association with the main shaft 100 and the respective interlocking rotation. A plurality of planetary gears 220; Each of the planetary gears is composed of a sun gear (230; 231, 232, 233, 234, 235) that is arranged to mesh with gears, and a sun gear shaft (250) spline-coupled to rotate in coordination with the sun gear (230).

The sprocket 310 of the sun gear shaft 250 is connected to the chain to transmit the shifted driving torque to the conventional wheel side.

In addition, the gears of the shift gear unit are accommodated in the case 205, and are configured of a six-speed gear stage and include a plurality of planetary gears 220 and ring gears 240 corresponding to the respective gear stages. .

Hereinafter, respective reference numerals will be described according to the number of gears, or common reference numerals will be described.

In addition, the planetary gears 220 of the transmission gear are normally engaged with a gear formed on the inner circumferential surface of the ring gear 240 to rotate in the same direction as the rotation direction of the main shaft 100, and when the ring gear is fixed by the clutching means. The main shaft 100 is rotated in the opposite direction to the rotation direction.

The planetary gear fixing pin 220a is rotatably supported by the planetary gear carrier cover 270 that is fixedly coupled to the inner side of the case 205.

Each of the planetary gears 220 may have a different outer diameter to adjust a gear ratio during shifting.

As for the clutching means, toothed gear teeth 240a are formed on the outer circumferential surfaces of the ring gears 240 constituting the shift gear part, and ring gears 240 are interlocked by interlocking means according to the movement of the selected cable 500. One of the gears is composed of a pole member 650 to interfere with and fixed to the teeth.

The interlocking means is disposed in the case and the rotating shaft 655 is rotatably coupled to the pole member 650, and disposed between the end of the cable and the pole member 650, the pole member (after the operation of the cable is completed) It is provided with a connecting spring member 640 for returning the 650 to its original position.

The pawl member 650 is formed at one side of the gear teeth corresponding to the gear teeth formed on the outer peripheral surface of the ring gear is formed.

The connection spring member 640 employs a compression spring, and as shown in the drawing, the connection spring member 640 is connected to the right side of the pole member 650 based on the rotation shaft 655.

This is because the connection spring member 640 normally pushes the pole member 650 in the direction of releasing interference with the ring gear to maintain the idle rotation of the ring gear, and the connection spring member 640 extends when the cable is operated. While rotating the pole member 650 about the rotation shaft 655 so as to interfere with the ring gear side.

9 and 10 are views showing another use example in which the arrangement position of the connection spring member 640 of the present invention is different. Unlike the foregoing, the connection spring member 640 has a pole member 650 based on the rotation shaft 655. Connected to the left side of the

That is, the pole member 650 is normally positioned at a position where the pole member 650 does not interfere with the ring gear by the elastic force of the connecting spring member 640, and the corresponding pole member 650 is operated when the cable selected by the lever operating unit is operated. In the tension operation, one side portion of the ring shaft 655 is engaged with the gear gear formed on the outer circumferential surface of the ring gear.

The lever operating portion is disposed such that an upper portion of the shift lever 420 protrudes upward, and the shift lever 420 is disposed to be received to be movable in the front, rear, left and right directions, and the shift lever 420. A plurality of operation levers 430 which are rotated while interfering with a part of the shift lever 420 according to the front and rear shift operations of the shift lever to tension the cable 500 and are arranged in parallel with the same number of shift stages of the shift gear unit; 430a, 430b, 430c, 430d, 430e, and 430f, a shift spring member 450 disposed below the shift lever 420 to elastically support rearward movement, and disposed below the operation lever 430 to operate. The return spring member 440 elastically supports the forward movement of the lever 430.

The shift lever 420 is axially coupled to a hinge shaft 422 having both end portions fixed to left and right sides of the housing 410, and has a structure rotatable before and after the hinge shaft 422.

In addition, the housing 410 is movable in the left and right directions of the shift lever 420 and has a guide groove 412 corresponding to each operation lever 430.

A lever guide 460 is fixedly installed at the front inner side of the housing 410 to guide the front and rear operations of the control levers 430 and to restrict the left and right movements.

The housing 410 is coupled to the body of the bicycle to be fixed through a clamp or the like.

The lever guide 460 is formed with a lever guide groove 462 in which a portion of each operation lever 430 is received and opened to the rear side.

Left and right movement of the shift lever 420 is an operation operation for moving the shift stage selection, and forward and backward movement is an operation operation for tensioning / relaxing the cable 500 for the shift operation.

Each of the operation levers 430 is configured to be rotatable in the front and rear directions through a connecting shaft 435 axially coupled to the inside of the housing 410.

In addition, the operation levers 430 are formed in the receiving groove 432 so that the end of the shift lever 420 is accommodated on the upper side, the shift lever 420 of the accommodation grooves 432 of each operation lever 430 A latching protrusion having an end bent to be inserted into one is formed.

The return spring member 440 has a structure in which one end is fixed to the front inner side of the housing 410 and the other end is fixed to the operation lever 430, and the middle part is wound around the outer circumferential surface of the connecting shaft 435.

Accordingly, the return spring member 440 has a function of elastically supporting the operation lever 430 toward the front side of the housing 410, and has a function of assisting the front return operation after the shift operation of the operation lever 430.

On the other hand, the shift spring member 450 elastically supports the shift lever 420 in the rearward direction of the housing 410, and thus has a function of supporting the rear movement when the shift stage of the shift lever 420 is selected.

FIG. 11 is a view illustrating another embodiment of the shift gear unit, and the structure thereof may include two pairs of planetary gears 220; 221, 222, 223, 224, 225, 226 and one sun gear 230 per sun gear 240. This is a structure in which a shift is made.

The planetary gear 220 has a structure that is fixedly connected on the same axis and has a structure corresponding to the planetary gears on the same axis irrespective of the connection of the ring gear.

That is, one sun gear 230 has a structure in which gears mesh with each other to correspond to only one planet gear connected to one of the planet gears 220 to be fixed on the same axis.

For example, in the case where the ring gear 241 of one of the ring gears 240 is fixed by the clutching means, the planetary gear 221 meshed with the ring gear 241 is counterclockwise as opposed to the progress direction of the clock hand. Rotational operation, and the planetary gear 223 fixed to the planetary gear 221 is also rotated in the counterclockwise direction, and transmits the rotational driving force to the sun gear 231 meshed with the planetary gear 223 and rotates clockwise Let's go.

Thus, the sun gear 231 and the spline connected sun gear shaft 250 are rotated in the clockwise direction to transmit the rotational force of each gear to the sprocket 310 by the ratio.

According to another embodiment of the shift gear unit, the shift gear unit may be shifted at various speed ratios according to the gear ratio of the shift gear according to various arrangements.

That is, other types of gears may be arranged in addition to the gear unit described above.

12 is a view showing still another embodiment of the present invention, wherein the transmission gear unit is further provided with a power transmission unit for transmitting the rotational driving force of the motor 700.

In detail, the power transmission unit includes a motor 700 including a stator 710 and a rotor 720, an auxiliary sun gear shaft 830 in which gears are engaged with the rotor 720, and an auxiliary sun gear shaft 830. The auxiliary sun gear 835 disposed at an end of the auxiliary gear, the auxiliary planetary gears 280 gear-engaged with the auxiliary sun gear 835 and pin-coupled to the inner surface of the case 205, and the gears of the auxiliary planetary gear 280 It is composed of a planetary gear carrier cover 270 is coupled to the interlocking rotation and connected to the planetary gear fixing pins (220a) coupled to the planetary gears 220 and the shaft coupled to transfer the rotational force.

In addition, the power transmission unit includes a one-way clutch unit to transmit the rotational force of the motor 700 and the rotational force of the main shaft 100 in one direction.

The one-way clutch part includes a first clutch part disposed between the rotor 720 of the motor 700 and the auxiliary sun gear shaft 830, and a second clutch part disposed between the main shaft 100 and the planetary gear carrier 210. It is composed.

As shown in FIG. 13, the first clutch part has a toothed gear tooth 725 formed on the inner circumferential surface of the rotor 720 of the motor 700, is disposed on an outer circumferential surface of the auxiliary sun gear shaft 830, and is a one-way spring member. A one-way stopper piece 810 is elastically supported to be rotatable outwardly by 820.

The one-way spring member 820 is disposed to be accommodated in the auxiliary sun gear shaft 830 to elastically support the one-way stopper piece 810 to push outward.

The one-way stopper piece 810 is disposed to be rotatable through the rotation pin 815 pinned to the auxiliary sun gear shaft 830.

The one-way stopper piece 810 serves to block the rotor 720 of the motor 700 from rotating in one direction and rotating in the other direction.

That is, when the rotor 720 of the motor 700 rotates counterclockwise, it transmits counterclockwise rotational force to the auxiliary sun gear shaft 830 side through the one-way stopper, and rotates idling when the counterclockwise direction is opposite. It is.

As shown in FIG. 14, the second clutch part has a toothed gear tooth 215 formed on the inner circumferential surface of the planetary gear carrier 210, and is disposed between the main shaft 100 and the planetary gear carrier 210 to be main. Rotating clutch 840 and the one-way stopper piece 810 is disposed on the outer circumferential surface of the rotary clutch 840 and is elastically supported by the one-way spring member 820 so as to be rotated outward. Equipped.

The second clutch part transmits rotational force to the planetary gear carrier 210 through the rotation clutch 840 only when the main shaft 100 is rotated in the clockwise direction, and when the main shaft 100 is rotated in the counterclockwise direction. There is to be idle.

The one-way spring member 820 and the one-way stopper piece 810 have a function of rotating in one direction in a direction opposite to the one-way spring member and one-way stopper piece of FIG. 9 described above, and only one direction rotation is different, and one direction rotation is performed. Since the same function is allowed only, duplicated descriptions are omitted.

The transmission gear unit is transmitted to the auxiliary sun gear shaft 830 and the auxiliary sun gear side from the rotor 720 through the first clutch portion when the rotational force of the motor 700 is transmitted, and the planetary gear carrier gear-engaged with the auxiliary sun gear. The rotational force is transmitted to the planetary gears through the cover 270 and the planetary gear fixing pin 220a.

Thereafter, as the ring gear 240 corresponding to the shift stage selected through the lever manipulation unit is fixed, the rotational force transmission process of the sun gear meshed with the planetary gear is the same as the above embodiment.

In addition, the second clutch part is for transmitting the rotational force of the main shaft 100 to the planetary gear carrier 210 in a clockwise direction in one direction, and the power transmission process transmitted to the planetary gear side thereafter is the same as the above-described embodiment. .

15 is an embodiment in which a power connection unit is further provided to transmit external power instead of the motor, and the power connection unit includes an auxiliary sun gear shaft 830 that is interlocked and rotated in one direction through a one-way clutch unit on the outside of the sun gear shaft 250. The clutch plate 320 is disposed to be linked to the outside of the auxiliary sun gear shaft 830 and the auxiliary sprocket 330 is disposed on the outer circumference thereof, and the belt chain 340 is connected to the auxiliary sprocket 330 to transmit external power. It is equipped with.

This makes it possible to transmit external power to the transmission gear portion side without limiting the position of the motor.

Referring to the operation of the embodiments of the present invention having such a configuration as follows.

In the transmission for a bicycle according to the present invention, when the pedaling force of the pedal 10 is transmitted to the main shaft 100 through the crank arm 20, the planetary gear carrier 210 connected to the main shaft 100 is interlocked and rotated. The rotational force of the planetary gear carrier 210 is transmitted to the planetary gears 220 of the shift gear unit through the planetary gear fixing pin 220a.

At this time, the planetary gear 220 of the shift gear unit is normally engaged with the gear formed on the inner circumferential surface of the ring gear to rotate together with the ring gear 240 in the same direction as the rotational direction of the main shaft 100, but by one of the clutching means. When the ring gear is selected and the rotation of the selected ring gear is fixed, the ring gear is rotated in the opposite direction to the rotation direction of the main shaft 100.

The operation of the clutching means can be divided into the operation of the lever operating portion and the operation of fixing the ring gear selected by the lever operating portion.

The shift lever 420 of the lever operating portion is normally positioned behind the guide groove 412 of the housing 410 corresponding to the shift stage most recently selected by the elastic support force of the shift spring member 450, not in the shifting stage. .

This is because the elastic support force of the shift spring member 450 which elastically supports the shift lever 420 in the rearward direction of the housing 410 and the elastic force of the return spring member 440 that elastically supports the forward movement of the operation lever 430. This is because the elastic force of the connecting spring 630 supporting the cable 500 in the relaxing direction acts as a greater force than the combined force.

When shifting, when the user moves the shift lever 420 to a position capable of moving left and right from the rear of the housing 410 to the front, and removes the force for operating the shift lever 420 at the desired shift stage home position. The shift lever 420 is fixed after the shift lever 420 is moved backward by the elastic support force of the shift spring member 450 that elastically supports the rear side of the housing 410.

In the rearward movement of the shift lever 420, the engaging projection of the shift lever 420 is inserted to be received in the receiving groove 432 of the operation lever 430 of one of the operation levers 430, and then the selected operation lever 430. Is rotated as the shift lever 420 rotates.

At this time, the operation lever 430 is rotated about the connection shaft 435.

When the operation lever 430 is rotated, the upper part is flipped to the rear side of the housing 410 based on the connecting shaft 435, but the lower part is moved to the front side of the housing 410.

As a result, the cable 500 connected to the lower portion of the manipulation lever 430 is pulled and tensioned by the rotation operation of the manipulation lever 430.

In this case, the cable 500 is connected to each operation lever 430, and one of the cables 500 is tensioned according to the movement of the selected operation lever 430 among the operation levers 430.

When the cable 500 is pulled and tensioned, the connection spring member 640 connected to the other end of the cable 500 is extended, and the pole member 650 connected to the connection spring member 640 that extends is centered on the rotation shaft 655. One side portion is engaged with the outer circumference of the ring gear by interfering with the rotation.

That is, the connection spring member 640 normally maintains the idle rotation of the ring gear by pushing the pole member 650 in the direction of releasing interference with the ring gear, but the connection spring member 640 extends when the cable is operated. While the pawl member 650 is rotated about the rotation shaft 655 to interfere with the ring gear side, the selected ring gear is stopped as it interferes with the ring gear.

As the ring gear is stopped, the planetary gear meshed with the ring gear is transferred to the planetary gear carrier 210 through the planetary gear carrier 210. Rotated counterclockwise).

As the planetary gear 220 or other planetary gears fixedly connected to the selected planetary gear are rotated counterclockwise, the gear-engaged sun gear 230 is rotated clockwise.

Subsequently, the sun gear shaft 250 spline-coupled with the sun gear 230 is rotated in the clockwise direction, and the sprocket 310 provided on the outside of the sun gear shaft 250 is rotated.

When the rotational driving force is transmitted to the sprocket 310, it has a power transmission process for transmitting the rotational force shifted through the chain connected to the sprocket 310 to the wheel side.

In this case, the case where the rotation speed of the sprocket 310 becomes faster based on the speed of the main shaft 100 and the sprocket 310 during the shift operation through the shift gear unit is referred to as a high speed shift, and the opposite case is referred to as a low speed shift.

When shifting according to the shift operation, only one of the plurality of pole members 650 fixes the ring gear corresponding to the selected shift stage, and the other part does not interfere with the ring gear.

Therefore, the remaining ring gears are interlocked with the rotational motions of the planetary gears, but become idle and do not affect the rotation of the planetary gears.

When the shifting process from the low stage to the high stage and the shifting operation from the high stage to the low stage are performed, the ring gear 240 corresponding to each shift stage is fixed, and the gear gear is engaged and the gear is engaged, so the shift speed is increased. Regardless of the natural shifting operation.

16 to 19 is a view showing another example of the interlocking means, the configuration is disposed between the rotary shaft 655, the pole member 650 is rotatably axially coupled, the end of the cable and the pole member 650 It is composed of a clutch ring member 610 is interlocked with the movement of the cable to adjust the interference operation with the ring gear for each part in contact with the pole member 650.

The clutch ring member 610 is connected to the end of the cable via the connector 510.

The connector 510 has a connection structure in which an end portion is bent and interlocked with the clutching ring member.

In addition, the clutch ring member 610 has a curved contact portion 612 is formed in contact with the pole member 650 in the portion corresponding to the pole member 650, and returned to its original position as the cable operation is completed. A tension spring member 660 for returning is connected.

The tension spring member 660 has a structure in which one end is connected to the clutch ring member 610 and the other end is fixed to the case.

That is, the tension spring member 660 is extended during the tensioning operation of the cable, and is reduced again when the operation of the cable is completed to perform the function of returning the clutch ring member 610 to its original position.

In another embodiment of the interlock means, the tension force is transmitted to the clutch ring member 610 through the connector 510 during the tension operation of the cable selected by the lever operating portion, the contact portion 612 as the clutch ring member 610 is rotated ) Rotates the pole member 650 to the ring gear side to interfere with each other gears to fix the selected ring gear.

Since the shift operation is the same as the above-described embodiment, a redundant description thereof will be omitted.

On the other hand, when the operation of the cable is completed, the clutch ring member 610 is returned to its original position by the restoring force of the tension spring member 660, the contact portion 612 of the clutch ring member 610 of the pole member 650 The pole member 650 is rotated about the rotation shaft 655 as the other parts come into contact with each other to release the interference state between the pole member 650 and the ring gear.

Therefore, the pawl member 650 and the ring gear are separated from each other to maintain the ring gear in the idle rotation state.

20 and 21 are views showing another example of the interlocking means, which are arranged to surround the outer circumferential surface of the case and on the inner circumferential surface of the clutch ring member 610 and the clutch ring member 610 which are interlocked and rotated during the tensioning operation of the cable. The pawl member 650 and the pawl member 650 disposed to be interlocked and retractable to the inside and the outside of the case, and disposed on the inner circumferential surface of the clutch ring member 610 to support the pawling operation of the pawl member 650. Pressing spring 670 for contacting and supporting the pawl member 650 to press the ring gear side, and one end is connected to the pawl member 650 and the other end is selectively contacted with the inner peripheral surface of the clutch ring member 610 by parts It is provided with a floating lever 680 to wobble the pole member 650.

The clutch ring member 610 is connected to the end of the cable 500 via the connector 510, and is connected to the tension spring member 660 to have a restoring force during the return operation.

In addition, the clutch ring member 610 is a rotation angle limiting hole 615 is formed to limit the rotation angle, the rotation angle restriction hole 615 is coupled to accommodate the fixed shaft 260 coupled to the case in the axial direction is received. do.

The tension spring member 660 has a structure in which one end is connected to the clutch ring member 610 and the other end is fixed to the case.

That is, the tension spring member 660 is extended during the tensioning operation of the cable 500, and is reduced again when the cable operation is completed to perform the function of returning the clutch ring member 610 to its original position.

The pressure spring 670 has a structure in which one end is fixed to the case 205 and is supported by a support protrusion 205b formed to protrude into the case in the middle thereof, and the other end is in contact with the pole member 650.

Since the other end of the pressure spring 670 is formed to be bent in a round shape, the case 205 by pressing the pole member 650 toward the ring gear while being in contact with the pole member 650 when the clutch ring member 610 rotates. Has the function of entering into the interior of the.

In addition, the case 205 is provided with a pawl bore hole 205a on the outer circumferential surface of the pawl member 650 so that it can be sunk.

The pole concave hole is not accommodated in a plurality of pole members in one hole, it may be dividedly accommodated in the pole concave hole 205a formed to be spaced apart from the outer peripheral surface of the case 205, respectively.

Another embodiment of the present invention interlocking means having such a configuration, when a force exceeding the tensile force of the tension spring member 660 during the pulling operation of the cable 500, the clutch ring member 610 is rotated, The other end of the pressure spring 670 presses the pawl member 650 so that a part of the pawl member 650 interferes with the outer circumferential surface of the ring gear 240 disposed in the case 205.

At this time, since the toothed gear tooth 240a is formed on the outer circumferential surface of the ring gear 240, the rotation is stopped as it interferes with the pole member 650.

Since the shift operation is the same as the above-described embodiment, a redundant description thereof will be omitted.

On the other hand, when the operation of the cable 500 is completed, the clutch ring member 610 is returned to its original position by the restoring force of the tension spring member 660, thereby preventing the end of the pressure spring 670 from pressing the pole member. At the same time as the contact portion is changed, the inner peripheral surface of the tapered clutch ring member 610 is pressed out of the other end of the floating lever 680 to draw out the pole member 650 to the outside of the pole inlet hole 205a.

As a result, the interference state between the fixed ring gear 240 and the pawl member 650 is released so that the ring gear 240 maintains the idle rotation state.

In the present invention, the gear ratio is determined by the gear arrangement and the gear ratio of the gear unit, and the shift operation can be performed according to the number of gear stages.

Explanation of symbols on the main parts of the drawings
10: Pedal 20: Crank Arm
100: main shaft 205: case
210: planetary gear carrier
220 (221,222,223,224,225,226): Planetary gear
220a: Planetary Gear Fixing Pin
230 (231,232,233,234,235,236): Sun gear
240 (241,242,243,244,245,246): Ring gear
250: sun gear shaft 270: planetary gear carrier cover
280: auxiliary planetary gear 310: sprocket
410: housing 412: guide groove
420: shift lever 425: locking projection
430: operation lever 432: receiving groove
435: connecting shaft 440: return spring member
450: shift spring member 460: lever guide
500: cable 510: connector
610: clutch ring member 640: connecting spring member
650: pole member 660: tension spring member
670: pressure spring 680: floating lever
700: motor 710: stator
720: rotor 810: one-way stopper piece
820: one-way spring member 830: auxiliary sun gear shaft
840: Rotating Clutch

Claims (7)

The main shaft connected to the pedal and crank arm of the bike,
A shift gear unit configured to receive a driving force transmitted from the main shaft in a plurality of shift stages interlocked with the main shaft in parallel;
A lever operation unit for operating one of the respective cables connected to each of the shift stages by selecting one of the shift stages of the shift gear unit according to an operation of the shift lever;
It is operated by one cable selected in the lever operation unit is provided with a clutching means for manipulating the shifting operation of the shifting gear portion by fixing one of the ring gears of the shifting gear portion in engagement engagement,
The shift gear unit is a planetary gear carrier which is splined and interlocked with the main shaft;
A plurality of planetary gears which are pin-coupled to the planetary gear carrier and interlocked and arranged in parallel;
A plurality of ring gears disposed in parallel to correspond to the planetary gears, the gear teeth being formed to engage with the gears of the planetary gears on an inner circumferential surface thereof;
And a sun gear and a sun gear shaft for outputting a driving force shifted with respect to the rotational driving force of the main shaft to the outside when one of the ring gears is fixed by the clutching means. The method according to claim 1,
The clutching means are toothed gear teeth are formed on the outer circumferential surface of the ring gears of the transmission gear,
And a pawl member interlocked with the interlocking means according to the movement of the selected cable and interfering with one of the ring gears to fix the ring gear.
The method according to claim 2,
The interlocking means may include a rotating shaft rotatably coupled with the pole member;
And a connecting spring member disposed between the end of the cable and the pole member to return the pole member to its original position after the operation of the cable is completed.
The method according to claim 2,
The interlocking means may include a rotating shaft rotatably coupled with the pole member;
It is disposed between the end of the cable and the pole member is interlocked according to the movement of the cable has a clutch ring member for adjusting the interference operation with the ring gear for each contacting the pole member Gearbox.
delete The method according to any one of claims 1 to 4,
The lever operating portion is arranged so that the upper portion is projected to the upper side of the housing and the lower portion is received in the interior of the housing, the shift lever is movable in the front, rear and left, right directions,
A plurality of operation levers which are rotated while interfering with a part of the shift lever in accordance with a forward and backward shift operation of the shift lever to tension the cable, and arranged in parallel with the same number of shift stages of the shift gear unit;
A shift spring member disposed below the shift lever to elastically support forward and backward movement;
And a return spring member disposed below the operation lever to elastically support the return operation of the operation lever. The method of claim 6,
Further provided with a power transmission unit for transmitting the driving force of the motor to the speed change side of the transmission gear portion selected through the clutching means,
The power transmission unit is coupled to interlock with the rotor side of the motor disposed on one side of the case surrounding the transmission gear unit, an auxiliary sun gear shaft having an auxiliary sun gear disposed on one outer peripheral surface;
Auxiliary planetary gears meshed with the auxiliary sun gear and pin-coupled to an inner surface of the case;
A planetary gear carrier cover which is gear-engaged and coupled to the auxiliary planetary gear and connected to a planetary gear fixing pin axially connected to the planetary gears;
And a one-way clutch unit configured to transmit the rotational force of the motor and the rotational force of the main shaft in one direction, respectively.

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