KR20150069332A - A Transmission apparatus of Bicycle - Google Patents

A Transmission apparatus of Bicycle Download PDF

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Publication number
KR20150069332A
KR20150069332A KR1020130155623A KR20130155623A KR20150069332A KR 20150069332 A KR20150069332 A KR 20150069332A KR 1020130155623 A KR1020130155623 A KR 1020130155623A KR 20130155623 A KR20130155623 A KR 20130155623A KR 20150069332 A KR20150069332 A KR 20150069332A
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KR
South Korea
Prior art keywords
latch
drum
unit
interference
flange
Prior art date
Application number
KR1020130155623A
Other languages
Korean (ko)
Inventor
이상옥
Original Assignee
하이이엔지(주)
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 하이이엔지(주) filed Critical 하이이엔지(주)
Priority to KR1020130155623A priority Critical patent/KR20150069332A/en
Publication of KR20150069332A publication Critical patent/KR20150069332A/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
    • B62M11/00—Transmissions characterised by the use of interengaging toothed wheels or frictionally-engaging wheels
    • B62M11/04—Transmissions characterised by the use of interengaging toothed wheels or frictionally-engaging wheels of changeable ratio
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
    • B62M21/00—Transmissions characterised by use of resilient elements therein
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
    • B62M25/00—Actuators for gearing speed-change mechanisms specially adapted for cycles
    • B62M25/02—Actuators for gearing speed-change mechanisms specially adapted for cycles with mechanical transmitting systems, e.g. cables, levers
    • B62M25/04—Actuators for gearing speed-change mechanisms specially adapted for cycles with mechanical transmitting systems, e.g. cables, levers hand actuated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
    • B62M9/00—Transmissions characterised by use of an endless chain, belt, or the like
    • B62M9/04—Transmissions characterised by use of an endless chain, belt, or the like of changeable ratio
    • B62M9/06—Transmissions characterised by use of an endless chain, belt, or the like of changeable ratio using a single chain, belt, or the like
    • B62M9/10—Transmissions characterised by use of an endless chain, belt, or the like of changeable ratio using a single chain, belt, or the like involving different-sized wheels, e.g. rear sprocket chain wheels selectively engaged by the chain, belt, or the like
    • B62M9/12—Transmissions characterised by use of an endless chain, belt, or the like of changeable ratio using a single chain, belt, or the like involving different-sized wheels, e.g. rear sprocket chain wheels selectively engaged by the chain, belt, or the like the chain, belt, or the like being laterally shiftable, e.g. using a rear derailleur
    • B62M9/121—Rear derailleurs

Abstract

A bicycle transmission device is disclosed. The bicycle transmission device comprises: a hollow connection shaft installed to penetrate a hollow portion of a hub shaft unit where a wheel of a bicycle is coupled and coupled to be rotated with respect to the hub shaft unit; a sprocket unit installed in one end part of the connection shaft and transmitting a rotational force to the connection shaft in a bicycle advancing direction and freely rotated with respect to the connection shaft in the opposite direction of the bicycle advancing direction; a main restraining unit selectively restraining and releasing the other end part of the connection shaft with respect to the hub shaft unit and integrally rotating when the other end part of the connection shaft is restrained; a latch control unit selectively releasing a restraining state of the restraining unit to enable the connection shaft to be capable of freely rotating with respect to the hub shaft unit; and a sub-restraining unit selectively allowing or restraining a function of the latch control unit.

Description

Description of the Related Art [0002] A Transmission apparatus of Bicycle [

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a bicycle transmission, and more particularly, to a bicycle transmission capable of shifting a bicycle even in a stationary state.

BACKGROUND OF THE INVENTION [0002] Generally, a gear transmission of a bicycle is installed in order to allow a pedal to be stepped on with a constant force and speed according to a running state, in which sprockets having different numbers of teeth on a pedal and a rear wheel axis are arranged in a superposed manner.

The gearbox of these bicycles is designed so that the bicycle chain is hung on a small sprocket on the pedal shaft, the large sprocket on the rear axle, and the bicycle chain is attached to the large sprocket on the pedal shaft and the small sprocket on the rear wheel shaft. So that the bicycle can be kept in the running state even if the pedal is stepped on at a constant force and speed. An example of this is disclosed in the prior art (Registration Utility Model No. 20-0274726, automatic transmission for bicycle).

However, in the conventional gear transmission of a bicycle as disclosed in the above prior art, the shift can be adjusted only while the bicycle is stepped on by stepping on the pedal, and there is a limit in which the gear can be shifted only when the pedal is stepped in the direction in which the bicycle advances.

In other words, even when the vehicle is traveling on a flat ground without accelerating the vehicle without lowering the slope without stepping on the pedal or by stepping on the pedal, the vehicle can be shifted only when the pedal is stepped on to transmit the rotational force to the bicycle wheel.

Further, according to the related art, there is a problem that the bicycle gear change can not be performed in a state where the bicycle is stopped.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a control apparatus for a bicycle transmission that is improved in structure so as to be capable of shifting gears by preventing transmission of a pressing force of a pedal from a bicycle to a bicycle in a stationary state .

In order to achieve the above object, a bicycle transmission according to the present invention includes: a hollow connecting shaft installed to penetrate through a hollow of a hub shaft unit to which a wheel of a bicycle is coupled and rotatably coupled to the hub shaft unit; A sprocket unit installed at one end of the connecting shaft and transmitting rotational force to the connecting shaft in the bicycle traveling direction and freely rotating with respect to the connecting shaft in the opposite direction; A main restraining unit that selectively restrains and releases the other end of the connecting shaft with respect to the hub shaft unit and rotates integrally when restrained; A latch control unit selectively releasing the restricting state of the restricting unit to make the connecting shaft freely rotatable with respect to the hub axis unit; And a sub-restraining unit selectively permitting or restricting the function of the latch control unit.

Here, the hub shaft unit includes a center wheel coupling unit, which is coupled to the outer periphery of the bicycle wheel, has a hollow opening at both ends, and is coupled to the wheel; A latch support flange connected to one side of the wheel engagement portion in a cylindrical shape and supporting a constraining latch of the constraining unit; And a coupling flange provided at one side of the wheel engagement portion and positioned inside the latch support flange so as to have a smaller diameter than the latch support flange, It is preferable that a latch through hole is formed to allow the latch to extend to the connection shaft side.

The main restraining unit may include an interference part provided on an outer periphery of the other end of the connecting shaft; And a constraining latch rotatably installed on the latch support flange so as to selectively interfere with the interference portion.

4. The apparatus of claim 3, wherein the latch control unit further comprises: a latch interfering drum coupled between the coupling flange and the latch support flange, the latch interfering drum rotating with the coupling flange and with a rotational clearance; A drum control unit selectively providing a load to the latch interference drum; A return spring for returning to the home position when the load is released, in a state where the latch interfering drum is relatively rotated with respect to the engagement flange by the rotation clearance when a load is applied from the drum control unit to the latch interference drum; And a latch interlocking portion for restricting relative rotation clearance of the latch interference drum with respect to the engagement flange and rotating the latching interlocking mechanism when the latch interference drum rotates independently of the engagement flange, The interference drum may be formed with a latch interference passage hole formed at a position corresponding to the latch passage hole so that the locking latch passes therethrough.

The latch interlocking portion may include a restricting portion provided on the latch interference drum; And a link lever having one end connected to the restraining part and the other end connected to the restraining latch, wherein when the latch interfering drum rotates relative to the latch interference drum, the link lever is interlocked with the rotation angle of the restraining part So that the constraining latch is rotated.

The latch interlocking portion may include a stopper lever extending from the restricting portion and contacting the engagement flange side with respect to the restricting portion when the link lever is rotated by the rotation clearance by the rotation clearance to limit the rotation clearance of the latch interference drum. .

It may further comprise a cap member coupled to the coupling flange, the cap member interfering with separation of the latch interference drum.

In addition, the sub-restraining unit is provided so as to be reciprocally slidable on the engaging flange so as to be connected to and detachable from the latch interfering drum, so that when the latch interfering drum is connected to the latch interfering drum, the latch interfering drum is integrally operated with the engaging flange A restraining drum restricting member; A blocking cap coupled to the coupling flange to block separation of the drum restraint member from the coupling flange; And a restraint member control unit for controlling the drum restraint member to be connected to and separated from the latch interference drum.

Further, the restraint member control unit may include: a pressing spring installed outside the engaging flange and elastically pressing the drum restraint member in a direction away from the latch interference drum; And a pressing operation portion for allowing the drum-restricting member to overcome the pressing force of the pressing spring and to be brought into contact with the latch interference drum.

Further, it is preferable that gears that are interlocked with each other are formed on the connecting portions of the restricting portion and the link lever.

Further, the restricting portion may include a link groove formed outside the latch interference drum, and an end of the link lever may be interlocked with the link groove by being hingedly connected.

According to the bicycle shifting device of the present invention, gear shifting can be performed while traveling, and gear shifting can be performed even in a stationary state. In particular, when the braking operation is performed, the mode is changed to a mode in which gear shifting is possible in the stop state, so that gear shifting is facilitated.

In addition, by including a sub-restraint unit for switching to a gear changeable mode at the time of a brake operation or for blocking a mode change at a source, the user can selectively apply the same.

1 is an exploded perspective view showing a bicycle transmission according to an embodiment of the present invention.
2 is an assembled cross-sectional view of the bicycle transmission of FIG.
3 is a left side view of the bicycle transmission of FIG.
Figs. 4 and 5 are views for explaining the operation of the bicycle transmission of Fig. 1. Fig.
6 is an exploded perspective view showing a bicycle transmission according to another embodiment of the present invention.
7 is an assembled cross-sectional view of the bicycle transmission shown in Fig.
8 is a left side view of the bicycle transmission shown in Fig.
9 and 10 are views for explaining the operation of the bicycle transmission shown in Fig.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT Hereinafter, a bicycle transmission according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 to 5, a bicycle transmission 100 according to an embodiment of the present invention includes a hollow coupling shaft 120 coupled to a hub shaft unit 110 to which a wheel of a bicycle is coupled, A sprocket unit 130 coupled to one end of the connection shaft 120 and a main restraining unit 140, a latch control unit 150 and a sub-restraining unit 160.

The hub shaft unit 110 has a hollow opening at both ends thereof coupled with the outer periphery of the bicycle wheel. The hollow hub unit 110 has a hollow cylindrical coupling part 111, A flange 113 and a coupling flange 115 of smaller diameter than the latch support flange 113 are provided. That is, the latch support flange 113 has a cylindrical shape and extends from one side of the wheel coupling portion 111 and may be integrally formed or separately manufactured and coupled. The engagement flange 115 is located inside thereof with a smaller diameter than the latch support flange 113 and has a cylindrical shape. The coupling flange 115 may be integrally formed on one side of the wheel coupling portion 111 or may be separately formed and coupled. The coupling flange 115 has a cylindrical shape, and a latch through-hole 115a through which the latch is passed is formed. A guide portion 115b is formed on the outer circumference at a certain distance from the end of the coupling flange 115 in the axial direction to guide the drum restraint member (to be described later) in a reciprocating manner. The guide portion 115b may include a guide groove formed at an outer periphery of the engagement flange 115 at a predetermined interval.

Further, the engagement flange 115 and the latch support flange 113 may be integrally formed and then coupled to the wheel engagement portion 111.

The connecting shaft 120 is coupled to the hollow interior of the hub shaft unit 110 having the above-described structure so that both ends thereof are exposed to the outside. The connecting shaft 120 is rotatably supported by the hub shaft 110, Lt; RTI ID = 0.0 > 1, < / RTI > The connecting shaft 120 also has a hollow opening at both ends and a first engaging part 123 is formed at one end of the hollow shaft body 121 to receive the sprocket unit 130, And a second coupling portion 125 to which an interference portion (to be described later) is coupled is formed at the other end. The supporting flange 127 is extended to the outside of the connecting shaft body 121 adjacent to the first connecting part 123 to limit the position where the connecting shaft 120 is coupled to the inside of the hollow shaft unit 110 It acts as a stopper. The first coupling portion 123 has a gear structure that is formed by repeatedly forming valleys and mountains in the circumferential direction on the outer circumference of the coupling shaft body 121 so that the sprocket unit 130 can be coupled and operated integrally .

A center shaft 170 is provided to pass through the hollow of the connecting shaft 120 and the connecting shaft 120 is freely rotatable with respect to the center shaft 170. To this end, a second bearing 163 is provided between the inner circumference of the connecting shaft 120 and the tightening nut 171, which are respectively coupled to both ends of the center shaft 170. The center shaft 120 The connecting shaft 120 is freely rotatable with respect to the fixed center shaft 120. In this case,

The sprocket unit 130 is coupled to the first engaging part 123 at one end of the connecting shaft 120 and transmits a rotating force by the chain to the connecting shaft 120 in the bicycle traveling direction A1, And may be freely rotated in the reverse direction (A2) so as not to transmit rotational force to the connecting shaft 120. [ The sprocket unit 130 is a known technology, and is applied to a general bicycle transmission. The sprocket unit 130 is provided with a latch for allowing rotation in one direction and suppressing rotation in the opposite direction.

More specifically, the sprocket unit 130 includes a latch support member 131 coupled to the first engaging portion 123 of the connecting shaft 120, A latch 133 which is movably installed on the latch support member 131 and a latching portion 134 formed on the inner periphery of the latch support member 131 along the circumferential direction, And an elastic ring 135 for providing an elastic force to come into contact with the elastic ring 135. A plurality of sprockets 137 are installed on the outer periphery of the sprocket support member 132 so that the chain 20 is connected. The latch 133 restrains the connection shaft 120 to rotate together when the sprocket 137 rotates in the traveling direction A and prevents the rotational force from being transmitted to the connection shaft 120 in the opposite direction B . A bearing 138 may be provided between the sprocket support member 132 and the latch support member 131 and a cap member 139 may be coupled to the outside of the latch support member 131 to support the sprocket support member 132 Suppress separation. Since the sprocket unit 130 having such a configuration can be understood from the known technology, a detailed description thereof will be omitted and it should be understood that the present invention is not limited by the configuration of the sprocket unit 130. One example of the latch 133, the latch support member 131, and the like is shown in Fig.

The main restraining unit 140 includes an interfering part 141 coupled to the second engaging part 125 of the other end of the connecting shaft 120 and an interlocking part 141 interposed between the interlocking part 141 and the latch supporting flange 113, respectively. The interference portion 141 is formed on the outer circumferential surface so as to have a mountain 142a and a valley 142b as shown in Figure 3. When the end of the constraining latch 142 enters the valley 142b as shown in Figure 3, The shaft 120 and the hub shaft unit 110 may be constrained and rotated together in the A1 direction.

The coupling flange 115 is formed with a latch passage hole 115a through which the constraining latch 142 passes and which can be brought into contact with the interference portion 141. [ Therefore, in the normal state, the end portions of the constraining latches 142 can be rotated together in the direction of travel of the bicycle while being interfered with the interference portion 141, and freely rotated in the opposite direction.

The latch control unit 150 includes a latch interference drum 151 fitted and coupled to the outside of the coupling flange 115, a drum control unit 153 selectively providing a load to the latch interference drum 151, 155 and a latch interlocking portion 157.

The latch interference drum 151 has a hollow interference drum body 151a which is fitted on the outer side of the coupling flange 115 and a disk coupling flange 151b which is extended from one end of the interference drum body 151a. The interference drum body 151a is formed with a latch interference through hole 151c corresponding to the latch through hole 115a formed in the coupling flange 115. [ A brake disk 171 is coupled to the disk coupling flange 151b. The latch interference drum 151 has a rotation clearance of a predetermined angle with the coupling flange 115, that is, the hub shaft unit 110. The rotation clearance is determined and limited by the latch interlocking portion 157.

The drum control unit 153 selectively provides a load to the latch interference drum 151 so that the latch interference drum 151 is rotated independently of the hub axis unit 110 by the rotation clearance, Is interfered with the latch interference drum 151 and separated from the interference portion 141. [ Therefore, in the state of FIG. 5, the rotational force of the connecting shaft 120 is not transmitted to the hub axis unit 110 in the traveling direction A1 and the reverse direction A2, and gear shifting becomes possible even in the stationary state. This drum control unit 153 may have a contact portion 153a selectively contacting and disengaging the brake disc 171 to selectively provide a load, i.e., a frictional force. This contact portion 155a may comprise, for example, a disk pad of a disk brake. Therefore, when the operation lever mounted on the bicycle handle and the drum control unit 153 are connected by a wire, the contact portion 153a can be brought into contact with and separated from the brake disk 171 by lever operation of the operation lever. The drum control unit 153 can apply the structure of a general brake device as described above, and a structure having a separate contact pad can be applied. Therefore, the present invention is not limited to the concrete examples.

The return spring 155 is provided between the latch interference drum 151 and the engagement flange 115 so that the latch interference drum 151 is rotated by the rotation clearance as shown in FIG. When the load is released, it returns to the state of FIG. The return spring 155 may be a coil spring, one end fixed to the latch interference drum 151, and the other end fixed to the coupling flange 115.

The constraining latch 142 contacts the interference portion 141 through the latch interference passage hole 151a and the latch passage hole 115a and interferes with the interference portion 141 as shown in Figure 3 to rotate the connection shaft 120 and the hub shaft unit 110, When the constraining latch 142 is interfered by the latch interference drum 151 and separated from the interference portion 141 as shown in Fig. 5, the connection between the connection shaft 120 and the hub shaft unit 110 Respectively.

The interference drum 151 and the coupling flange 115 are integrally rotated and the interference drum 151 is rotated only in the rotation direction of the brake disk 171. In this case, Lt; / RTI > When the latch interference passage hole 151a and the latch passage hole 115a are shifted from each other and the latch interference passage hole 151a and the latch passage hole 115a are out of order, (151) and is separated from the interference portion (141). Consequently, the restraint between the connection shaft 120 and the hub shaft unit 110 is released, and they are freely rotatable with respect to each other. Therefore, even if the sprocket unit 130 is rotated in the normal direction and the reverse direction, the hub shaft unit 110 is in a free rotation state in which no rotational force is transmitted, and gear shifting is possible even in the stopped state. Gear shifting is possible.

When the load applied to the interference drum 151 is released, the interference drum 151 is returned to its original position by the returning force of the return spring 155, and the latch interference through hole 151a and the latch through hole And the restraining latch 142 also comes into contact with the interference portion 141 so that the hub shaft unit 110 in the forward direction is restrained with respect to the connection shaft 120 and rotated together.

When the user wishes to change gears in a stopped state or in a flat or slanting gear regardless of the rotation of the bicycle wheel while using the bicycle as described above, the constraining latch 142 is released from the drum control unit 153. The connection shaft 120 is freely rotatable relative to the hub shaft unit 110 by releasing the restraint of the hub shaft unit 110 with respect to the connection shaft 120. [ Accordingly, when the bicycle pedal is rotated in the traveling direction A1 and the sprocket rotates in the traveling direction A1, the rotational force is transmitted only to the sprocket unit 130 and the connecting shaft 120, The rotational force is not transmitted. As a result, even if the pedal is stepped in the direction of travel, the rotational force is not transmitted to the bicycle wheel, so that the gear can be shifted even in the stopped state, and the load applied to the pedal can be minimized So that a shift can be performed.

The latch interlocking portion 157 restrains the relative rotation clearance of the latch interference drum 151 with respect to the engagement flange 115. When the latch interlocking portion 157 independently rotates with respect to the latch interference drum 151, . The latch interlocking portion 157 includes a restricting portion 157a provided on the latch interference drum 151 and a link lever 157b connected to the restricting portion 157a and the other end connected to the archival latch 142, Respectively. The restricting portion 157a is formed integrally with the latch interference drum 151 and has a circular groove shape in which the end of the link lever 157b is fitted and engaged. The link lever 157b is formed integrally with the constraint latch 142 and is formed so as to maintain a predetermined angle with the constraint latch 142 from the center of the constraint latch 142. [

The latch interlocking portion 157 extends from the restricting portion 157a and is engaged with the restricting portion 157a when the link lever 157b is rotated by the rotation clearance in the interlocking rotation direction, And a stopper lever 157c for restricting the rotation clearance of the latch interference drum 151. [

3, when the latch interference drum 151 is rotated by the rotation clearance as shown in FIG. 5, the link lever 157b connected to the restricting portion 157a is rotated in the interlocking direction, 142 are also rotated and separated at the interfering portion 141. The stopper lever 157c is also moved together with the latch interference drum 151 and is brought into contact with the constraining latch 142 so that the rotation of the latch interference drum 151 is stopped so as to be rotated only by the rotation clearance.

In addition, the sub-limiting unit 160 selectively permits or constrains the function of the latch control unit 150 to operate. The sub-restraint unit 160 includes a drum restraint member 161, a shutoff cap 163, and a restraining member control unit 165. The drum locking member 161 is slidably and reciprocally slidable on the coupling flange 115 so as to be connected to and detached from the latch interference drum 151. When the latch interference drum 151 is connected to the latch interference drum 151, So as to be integrally operated with the flange 151. A frictional pattern (sawtooth) is formed at the end of the drum locking member 161 to give a restraining force to move integrally with each other in a state of being in contact with the latch interference drum 151 of the drum locking member 161, (Defect hole) to which a friction pattern is coupled may be formed on the substrate 151. The drum restraint member 161 is rotated integrally with the engaging flange 151 in a state of being engaged with the engaging flange 151 in a reciprocating sliding manner in the axial direction. A guide groove is formed on the outer periphery of the engaging flange 151 to engage with the drum locking member 161 so as to reciprocally slide.

The blocking cap 163 is coupled to the end of the coupling flange 115 to block the separation of the drum restraint member 161. A pressing spring 165a is provided between the drum locking member 161 and the latch interference drum 161 so that the drum locking member 161 is separated from the latch interference drum 161. [

The restraining member control unit 165 includes a pressing spring 165a and a pressing operation portion 165b. The pressing operation portion 165b forcibly pushes the drum restraint member 161 to overcome the elastic force of the pressure spring 165a and to interfere with the latch interference drum 151. [ The pressing operation portion 165b may be installed on a fixed shaft coupled to the hollow of the center shaft coupled to the center of the connecting shaft 120. [ Specifically, the pressing operation portion 165b may be installed in a frame coupled to the fixed shaft, may include a solenoid operated according to an operation signal, may be rotated by an operation of operating a wire or the like with an operation lever, And the drum restraint member 161 is forcibly pushed. That is, the present invention is not limited to the specific configuration of the pressing operation portion, and various examples are possible.

6 to 10, in the transmission of the bicycle according to another embodiment of the present invention, in the latch interlocking portion for limiting the rotation clearance of the latch interference drum 151 and the constraining latch 142 And a gear that is interlocked with each other is formed at a portion where the restricting portion and the link lever are connected to each other. Therefore, when the latch interference drum 151 is rotated by the rotation clearance, the constraining latch 142 can be rotated by the gear operation of the link lever and the constraining portion connected to the gear, and can be operated to be separated or returned at the interference portion 141.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. Those skilled in the art will readily appreciate that many modifications and variations of the present invention are possible without departing from the spirit and scope of the appended claims.

100 .. Bicycle transmission device 110 .. Hub axis unit
120 .. Connection shaft 130 .. Sprocket unit
140. Main restraint unit 150. Latch control unit
160. Sub-

Claims (11)

A hollow connecting shaft installed to penetrate the hollow of the hub shaft unit to which the wheels of the bicycle are coupled and rotatably engaged with the hub shaft unit;
A sprocket unit installed at one end of the connecting shaft and transmitting rotational force to the connecting shaft in the bicycle traveling direction and freely rotating with respect to the connecting shaft in the opposite direction;
A main restraining unit that selectively restrains and releases the other end of the connecting shaft with respect to the hub shaft unit and rotates integrally when restrained;
A latch control unit selectively releasing the restricting state of the restricting unit to make the connecting shaft freely rotatable with respect to the hub axis unit; And
And a sub-restraining unit for selectively permitting or restricting the function of said latch control unit. 2. The hub unit according to claim 1,
A center wheel coupling portion coupled to the outer periphery of the bicycle wheel and having a hollow opening at both ends,
A latch support flange connected to one side of the wheel engagement portion in a cylindrical shape and supporting a constraining latch of the constraining unit;
And a coupling flange installed at one side of the wheel engagement portion so as to be located inside the latch support flange so as to have a smaller diameter than the latch support flange,
Wherein the coupling flange is formed with a latch passage hole through which a locking latch movably installed on the latch support flange passes and extends toward the connection shaft. 3. The apparatus of claim 2, wherein the main restraint unit comprises:
An interference part provided on an outer periphery of the other end of the connection shaft;
And a constraining latch rotatably installed on the latch support flange so as to selectively interfere with the interference portion. The latch control unit according to claim 3,
A latch interfering drum coupled between the coupling flange and the latch support flange and rotatable together with the coupling flange and a rotational clearance;
A drum control unit selectively providing a load to the latch interference drum;
A return spring for returning to the home position when the load is released, in a state where the latch interfering drum is relatively rotated with respect to the engagement flange by the rotation clearance when a load is applied from the drum control unit to the latch interference drum; And
And a latch interlocking portion for restricting a relative rotation clearance of the latch interference drum relative to the engagement flange and rotating the latch interlocking drum in conjunction therewith when the latch interference drum rotates independently of the engagement flange,
Wherein the latch interference drum is formed with a latch interference passage hole formed at a position corresponding to the latch passage hole and allowing the locking latch to pass therethrough. The latch mechanism according to claim 4,
A restricting portion provided on the latch interference drum;
And a link lever having one end connected to the restraining part and the other end connected to the restraining latch,
Wherein when the latch interference drum relatively rotates relative to the latch interference drum, the link lever interlocks with the rotation angle of the restraining portion to rotate the constraining latch. 6. The method of claim 5,
The latch interlocking portion
And a stopper lever extending from the restricting portion and restricting the rotation clearance of the latch interference drum by being brought into contact with the engagement flange side when the link lever rotates by the rotation clearance with respect to the restricting portion. Bicycle gearbox. 5. The method of claim 4,
Further comprising a cap member coupled to the coupling flange to block the latch interference drum from being disengaged. 5. The apparatus according to claim 4, wherein the sub-
A drum restraining member that is slidably slidable on the coupling flange so as to be connected to and detachable from the latch interference drum and restrains the latch interference drum to operate integrally with the coupling flange when the latch interference drum is connected to the latch interference drum;
A blocking cap coupled to the coupling flange to block separation of the drum restraint member from the coupling flange;
And a restraint member control unit for controlling the engagement and disengagement of the drum restraint member with the latch interference drum. 9. The apparatus according to claim 8,
A pressing spring installed outside the coupling flange and elastically pressing the drum locking member in a direction separating from the latch interference drum;
And a pressing operation portion for allowing the drum-restricting member to overcome the pressing force of the pressing spring and contact the latch interference drum. The method according to claim 6,
And a gear that is interlocked with the restricting portion and the link lever is formed at a portion where the restricting portion and the link lever are connected to each other. The method according to claim 6,
Wherein the restricting portion includes a link groove formed outside the latch interference drum,
And an end of the link lever is inserted into the link groove and hingedly connected to the link lever.
KR1020130155623A 2013-12-13 2013-12-13 A Transmission apparatus of Bicycle KR20150069332A (en)

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KR1020130155623A KR20150069332A (en) 2013-12-13 2013-12-13 A Transmission apparatus of Bicycle

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Application Number Priority Date Filing Date Title
KR1020130155623A KR20150069332A (en) 2013-12-13 2013-12-13 A Transmission apparatus of Bicycle

Publications (1)

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KR20150069332A true KR20150069332A (en) 2015-06-23

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KR1020130155623A KR20150069332A (en) 2013-12-13 2013-12-13 A Transmission apparatus of Bicycle

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