WO2014003395A1 - Transmission for bicycle - Google Patents

Transmission for bicycle Download PDF

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Publication number
WO2014003395A1
WO2014003395A1 PCT/KR2013/005566 KR2013005566W WO2014003395A1 WO 2014003395 A1 WO2014003395 A1 WO 2014003395A1 KR 2013005566 W KR2013005566 W KR 2013005566W WO 2014003395 A1 WO2014003395 A1 WO 2014003395A1
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WO
WIPO (PCT)
Prior art keywords
latch
unit
sprocket
cam plate
support
Prior art date
Application number
PCT/KR2013/005566
Other languages
French (fr)
Korean (ko)
Inventor
이상옥
최재권
Original Assignee
주식회사 드림앤첼린지
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.)
Filing date
Publication date
Application filed by 주식회사 드림앤첼린지 filed Critical 주식회사 드림앤첼린지
Publication of WO2014003395A1 publication Critical patent/WO2014003395A1/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
    • 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
    • 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
    • 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
    • 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

Definitions

  • the present invention relates to a bicycle transmission, and more particularly, to a bicycle transmission that can be shifted even in a stationary state.
  • the gear transmission of the bicycle is installed to be able to step on the pedal at a constant force and speed according to the driving state, it consists of a method of overlapping the sprocket (sprocket) having a different number of teeth on the pedal and the rear wheel shaft.
  • the gear transmissions of these bicycles have the chain chain on the hill, the pedal shaft on the small sprocket, the rear wheel shaft on the large sprocket, and when the speed is flat on the flat, the bicycle chain on the pedal shaft on the large sprocket and the rear wheel shaft on the small sprocket.
  • the gear transmission as described above can be adjusted only when the bicycle is running, it is impossible to adjust the transmission when the wheel is stopped.
  • the present invention was conceived in view of the above, and an object thereof is to provide a bicycle transmission apparatus having an improved structure to allow a gear shift even in a stationary state.
  • the sprocket support unit rotatably supported on the hub shaft unit to which the wheel of the bike is coupled, the plurality of sprockets are supported on the outside;
  • a latch unit installed between the hub shaft unit and the sprocket support unit to allow rotation of the sprocket support unit in one direction and to suppress rotation in the other direction;
  • a latch control unit for selectively controlling the latch unit to allow free rotation of the sprocket support unit with respect to the hub shaft unit in the other direction so that gear shifting is possible in a stopped state. do.
  • the latch unit may include a latch movably installed at an outer circumferential side of the hub shaft unit; An elastic member for elastically supporting the latch so as to protrude outwardly; And a latch interference part disposed on an inner circumference of the sprocket support unit so as to face the latch and having a latch catching hole for engaging the latch when the sprocket support unit rotates in the other direction.
  • the latch unit may further include a latch support cap coupled to an end of the hub shaft unit to prevent the sprocket support unit from being separated from the hub shaft unit, and supporting the latch at an outer circumference thereof.
  • the latch control unit may further include: a guide protrusion installed to protrude toward the side of the latch; A cam plate coupled to the guide protrusion and having a cam portion for controlling the position of the guide protrusion during rotation, the cam plate being rotatable with the latch support cap and connected to the latch support cap so as to be relatively rotatable; And a frictional force providing unit for selectively providing a friction force to the cam plate so that the cam plate is rotated relative to the latch support cap.
  • the guide is provided along the cam unit. It is preferable that the sprocket support unit is freely rotatable in the other direction by changing the position of the projection so that the latch is changed in posture so as to escape the latch interference hole.
  • the latch control unit may further include a rotation angle limiter disposed between the cam plate and the latch support cap to limit a range in which the cam plate is rotated relative to the latch support cap.
  • the latch control unit may further include a fixing member for preventing the cam plate from being separated from the latch support cap.
  • the latch interference portion is preferably formed integrally on the inner circumference of the sprocket support unit.
  • the sprocket support unit the sprocket support housing is rotatably supported by a bearing on the outside of the hub shaft unit, a plurality of sprockets are fitted to the outer periphery; And a release preventing cap which is fastened to an end of the sprocket support housing and prevents detachment of the sprocket coupled to the sprocket support housing, wherein the latch interference part is installed at the release preventing cap.
  • the bicycle transmission device of the present invention not only can the gear shifting while driving, but also the gear shifting in the stationary state.
  • the gear shift can be easily performed even in a state of driving at a low speed, such as when driving on a flat road and driving uphill suddenly, so that the bicycle can be used more conveniently.
  • FIG. 1 is an exploded perspective view showing a shift of the bicycle according to an embodiment of the present invention.
  • FIG. 2A is a cross-sectional view of the transmission of the bicycle shown in FIG.
  • FIG. 2B is a perspective view of the latch unit illustrated in FIG. 1.
  • FIG. 3 is a front view showing the transmission of the bicycle in the state of Figure 2a.
  • 4 and 5 are diagrams for explaining a state in which gear shift is possible in the stationary state.
  • FIG. 6 and 7 are views for explaining a transmission device of a bicycle according to another embodiment of the present invention.
  • the bicycle transmission apparatus 10 is rotatably supported by the hub shaft unit 20 to which the wheels of the bicycle are coupled, and a plurality of sprockets 30 on the outside. And a latch unit 50 and a latch control unit 60 installed between the sprocket support unit 40, the hub shaft unit 20, and the sprocket support unit 40.
  • the hub shaft unit 20 includes a hub shaft body 21 and a bearing support member 23 coupled to one end of the hub shaft body 21.
  • the hub shaft body 21 has a hollow shaft 21a and a flange portion 21b spaced apart from each other at the hollow shaft 21a.
  • One end of the hollow shaft 21a is formed with a screw line to fasten the bearing support member 23.
  • the bearing support member 23 has a cylindrical shape, and a support bearing 70 is installed at an outer circumference thereof, and a screw thread screwed to the hollow shaft 21a is formed at one inner circumferential surface thereof, and a latch to be described later on the outer circumference of the other end thereof.
  • a screw engaging portion 23a having a screw line is formed so that the support cap 51 can be screwed.
  • the bearing support member 23 may be integrally formed with the hub shaft body 21, or may be manufactured and combined as a separate component.
  • a support bearing 70 is installed between the sprocket support unit 40 and the bearing support member 23 of the hub shaft unit 20.
  • the sprocket support unit 40 is separated from the sprocket support housing 41 in which a plurality of sprockets 30 are inserted and supported on the outer circumference and the sprocket 30 coupled to an end of the sprocket support housing 41 to prevent the sprocket 30 from being separated.
  • the prevention cap 43 is provided. On the outer circumference of the sprocket support housing 41, the locking jaw is formed in a predetermined pattern to prevent free rotation of the sprocket 30 coupled thereto.
  • the separation prevention cap 43 has a ring shape that is screwed to the end of the sprocket support housing 41, and is installed to protrude to the outer circumference of the sprocket support housing 41.
  • a latch interferer 57 which will be described later, is installed on an inner circumference of the sprocket support unit 40, that is, an inner circumference of the sprocket support housing 41, and a latch 53 to be described later. Latch interference hole 57a is formed.
  • Sprocket support unit 40 having the above configuration can be freely rotated in one direction (A (opposite direction of the bicycle wheel driving direction), free rotation in the other direction (B: bicycle wheel driving direction) is latch unit 50 Is optionally limited.
  • the latch unit 50 allows rotation of the sprocket support unit 40 in one direction A and selectively restricts rotation in the other direction B.
  • the latch unit 50 includes a latch support cap 51 coupled to an outer circumference of the end of the bearing support member 23 of the hub shaft unit 20, and a latch movably installed outside the latch support cap 51. 53, an elastic member 55 for elastically supporting so as to protrude outward in the pressed state of the latch 53, and a latch interference portion 57.
  • the latch support cap 51 is screwed to one end of the bearing support member 23, thereby preventing the sprocket support unit 40 and the support bearing 70 from being separated from the hub shaft unit 20.
  • a latch seating groove 51b on which the latch 53 is seated is formed to be pulled out from the outer circumference.
  • an outer circumference of the cap body 51a is formed with an annular groove 51c in which the elastic member 55 is supported in the circumferential direction.
  • the support jaw 51d on which the cam plate 62 to be described later is supported is formed on one side of the cap body 51a.
  • the latch 53 is installed to be received in the latch seating groove 51b formed on the outer circumference of the latch support cap 51, and is installed to rotate at a predetermined angle within the latch seating groove 51b, and the attitude of the latch interferer is changed. It can be moved to engage or escape the latch latch (57a) formed in the (57). That is, the latch 53 is caught in the latch latch 57a in the posture (FIGS. 2A and 3) protruding from the outer circumference of the latch support cap 51 so that the sprocket support unit 40 does not freely rotate in one direction A.
  • the sprocket support unit 40 is not caught by the latch 53 and freely restrained to be rotated together with the hub shaft unit 20, while being elastically pressed in the other direction (B) by interfering with the latch latch 57a. Allow it to rotate.
  • the latch 53 is elastically supported by the elastic member 55, and is elastically supported in a direction in close contact with the latch latch 57a.
  • the elastic member 55 includes an elastic ring for supporting the latch 53 in a state of being fitted into the annular groove 51c of the support cap 51, and the elastic member 55 is inserted into a central portion of the latch 53. Supported slots 55a are formed.
  • the latch interference portion 57 is installed on the inner circumference of the sprocket support unit 40 corresponding to the outer circumference of the latch support cap 51, and the latch interference hole 57a at which the end of the latch 53 is caught is fixed in the circumferential direction. Formed at intervals.
  • the latch interference portion 57 has a ring shape, may be installed on the inner circumference of the sprocket support unit 40, and preferably may be integrally formed on the inner circumference of the sprocket support unit 40.
  • the latch control unit 60 selectively controls the latch unit 50 to allow free rotation of the sprocket support unit 40 with respect to the hub shaft unit 20 also in the other direction B. This is to allow gear shifting at.
  • the latch control unit 60 includes a guide protrusion 61 installed to protrude toward the side of the latch 53, a cam plate 62, a rotation angle limiter 63, a fixing member 64, and a frictional force providing unit 65. ).
  • the guide protrusion 61 is installed to protrude toward the side of the latch 53.
  • the guide protrusion 61 may be formed integrally with the latch 53, or may be provided by inserting a separate pin after pressing a hole into the latch 53.
  • the cam plate 62 is formed on one surface of which the guide protrusion 61 is fitted and coupled, and the cam portion 62a for controlling the position of the guide protrusion 61 is rotated to face the latch 53.
  • the cam plate 62 is connected to the latch support cap 51 so as to be rotatable relative to the latch support cap 51.
  • the cam part 62a guides and positions the guide protrusion 61 when the cam plate 62 rotates to maintain the latch 53 protruding or lying down from the outer circumference of the latch support cap 51. Therefore, when the guide protrusion 61 is guided by the cam portion 62a and moved to the center of rotation as much as possible, the latch 53 is held in a lying position (states of FIGS.
  • the sprocket support unit 40 may be freely rotated in the other direction (B).
  • the latch 53 is returned to its original position (line position) by the elastic restoring force of the elastic member 55, and the guide protrusion 61 is also as far as possible from the center of rotation.
  • the cam plate 62 can also be driven at a predetermined angle to change the attitude.
  • the rotation angle limiter 63 includes a locking jaw 63a formed at the inner circumference of the cam plate 62 and a stopper portion 63b formed at the outer circumference of the latch support cap 51.
  • the locking jaw 63a and the stopper portion 63b interfere with each other so that the cam plate 62 can be rotated only within a predetermined angle range, so that even if a large external force (friction force) is applied to the cam plate 62, the cam plate 62 is rotated more than the determined angle.
  • the fixing member 64 is installed on the latch support cap 51 to fix the cam plate 62 so as not to be separated from the latch support cap 51.
  • the fixing member 64 preferably includes a snap ring that is elastically coupled to the outer circumference of the latch support cap 51.
  • the friction force providing unit 65 selectively provides the friction force to the cam plate 62 so that the cam plate 62 rotates independently without integrally rotating with the latch support cap 51, that is, with respect to the latch support cap 51. It is intended to be rotated relatively.
  • the friction force providing unit 65 is connected to the friction member 65b and the friction member 65b movably installed on the support bracket 65a installed on the central shaft 1 to move the friction member 65b.
  • a wire 65c is provided.
  • the central shaft 1 is installed to pass through the center of the hub shaft unit 20 and is supported by a bearing so as to be rotatable relative to the hub shaft unit 20.
  • the support bracket 65a is fixedly installed on the central shaft 1, and the friction member 65b is installed on the support bracket 65a to be movable.
  • the friction member 65b may be rotatably connected to the support bracket 65a, for example, or may be installed to reciprocally slide. Then, the friction member 65b is selectively contacted or pressurized by the cam plate 62 while being interlocked by the pulling and pulling release operation of the wire 65c, or the contact pressurization is released.
  • the wire 65c is connected to the friction member 65b to press the friction member 65b to closely contact the cam plate 62 by an operation of a wire operation unit (not shown), or to return to an initial position where no pressing force is applied.
  • the friction member 65b and the cam plate 62 may be separated from each other.
  • the wire operation unit may include an operation lever installed on a bicycle handle, and the like.
  • the configuration of the wire operation unit, the wire 65c, and the friction member 65b may be a structure or a brake of a gear shift lever and a wire widely applied to a bicycle. Since it is easily applicable from the configuration of the lever and the wire, further detailed description will be omitted.
  • the specific configuration of the frictional force providing unit 65 is not intended to limit the present invention, it should be understood that various embodiments are possible.
  • FIGS. 2A and 3 illustrate a driving state.
  • the latch 53 operates normally, so that the sprocket support unit 40 is in one direction A with respect to the hub shaft unit 20. It is relatively freely rotatable and is restrained by the latch 53 so as to rotate integrally with the hub shaft unit 20 in the other direction (B). Therefore, in this state, it is possible to shift the chain by shifting the chain using the gear transmission during driving, and when the pedal is pressed, the power is transmitted to the hub shaft unit 20 through the sprocket support unit 40. You can rotate the bicycle wheels.
  • the latch interference portion 57 ′ where the latch 53 is selectively restrained is the cap of the separation of the sprocket support unit 40 It may be formed integrally with 43 '.
  • the release preventing cap 43 ' is screwed to the outer circumferential surface or the inner circumferential surface of the end of the sprocket support housing 41, may have a structure formed to cover each of the outer circumferential surface and the inner circumferential surface.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Transmission Devices (AREA)
  • Gears, Cams (AREA)

Abstract

Disclosed is a transmission for a bicycle, comprising: a sprocket supporting unit rotatably supported by a hub shaft unit to be coupled with a wheel of a bicycle and in which a plurality of sprockets are to be supported by the outside thereof; a latch unit provided between the hub shaft unit and the sprocket supporting unit, permitting rotation in one direction of the sprocket supporting unit, and suppressing the rotation in the other direction of the sprocket supporting unit; and a latch control unit for enabling shifting of gears in a stopped state by enabling the free rotation of the sprocket supporting unit in the other direction with respect to the hub shaft unit through a selective control for the latch unit.

Description

자전거 변속장치Bicycle transmission
본 발명은 자전거 변속장치에 관한 것으로서, 보다 상세하게는 정지 상태에서도 변속이 가능한 자전거 변속장치에 관한 것이다.The present invention relates to a bicycle transmission, and more particularly, to a bicycle transmission that can be shifted even in a stationary state.
일반적으로 자전거의 기어 변속기는 주행상태에 따라 페달을 일정한 힘과 속도로 밟을 수 있도록 하기 위하여 설치되는데, 페달과 뒷바퀴 축에 서로 다른 톱니 수를 갖는 스프로킷(sprocket)을 중첩배치하는 방식으로 이루어져 있다.In general, the gear transmission of the bicycle is installed to be able to step on the pedal at a constant force and speed according to the driving state, it consists of a method of overlapping the sprocket (sprocket) having a different number of teeth on the pedal and the rear wheel shaft.
이러한 자전거의 기어 변속기는 언덕에서는 자전거 체인을 페달 축은 작은 스프로킷에, 뒷바퀴 축은 큰 스프로킷에 걸리도록 하고, 평지에서 속도가 빨라지는 경우에는 자전거 체인을 페달 축은 큰 스프로킷에, 뒷바퀴 축은 작은 스프로킷에 걸리도록 하여 페달을 일정한 힘과 속도로 밟아도 자전거의 진행상태를 유지할 수 있도록 하는 것이다.The gear transmissions of these bicycles have the chain chain on the hill, the pedal shaft on the small sprocket, the rear wheel shaft on the large sprocket, and when the speed is flat on the flat, the bicycle chain on the pedal shaft on the large sprocket and the rear wheel shaft on the small sprocket. By pressing the pedal at a constant force and speed to keep the progress of the bike.
그런데 상기와 같은 기어 변속기는 자전거의 주행시에만 조절을 할 수 있으며, 바퀴가 정지된 상태에서는 변속기의 조절이 불가능하게 된다.By the way, the gear transmission as described above can be adjusted only when the bicycle is running, it is impossible to adjust the transmission when the wheel is stopped.
따라서 종래에는 정지된 상태에서 기어 변속을 하기 위해서는, 자전거의 뒷바퀴를 지면으로부터 이격시켜 놓은 상태에서 변속을 해야 하므로, 매우 번거롭고 사용이 불편한 문제점이 있었다.Therefore, in the related art, in order to shift gears in a stationary state, shifting is required in a state in which the rear wheel of the bicycle is spaced apart from the ground.
특히, 어린이 등의 청소년은 무거운 자전거를 지면에서 이격되도록 한 손으로 자전거 뒷바퀴를 든 상태에서 변속작업을 하는 것이 어렵기 때문에, 실질적으로 정지 상태에서의 기어 변속을 하지 못하는 문제점이 있다.In particular, adolescents, such as children, it is difficult to shift gears while holding the rear wheel with one hand so that heavy bicycles are separated from the ground, and thus there is a problem in that the gears are not shifted in a substantially stopped state.
본 발명은 상기와 같은 점을 감안하여 창안된 것으로서, 정지 상태에서도 기어 변속이 가능하도록 구조가 개선된 자전거 변속장치를 제공하는데 그 목적이 있다.The present invention was conceived in view of the above, and an object thereof is to provide a bicycle transmission apparatus having an improved structure to allow a gear shift even in a stationary state.
상기 목적을 달성하기 위한 본 발명의 자전거 변속장치는, 자전거의 바퀴가 결합되는 허브축 유닛에 회전 가능하게 지지되며, 외측에 복수의 스프라켓이 지지되는 스프라켓 지지유닛; 상기 허브축유닛과 상기 스프라켓 지지유닛 사이에 설치되어, 상기 스프라켓 지지유닛의 일방향으로의 회전을 허용하고, 타방향으로의 회전을 억제하는 래치 유닛과; 상기 래치 유닛을 선택적으로 제어하여, 상기 타방향으로도 상기 허브축유닛에 대해 상기 스프라켓 지지유닛의 자유회전이 가능하도록 하여 정지 상태에서 기어 변속이 가능하도록 하는 래치 제어유닛;을 포함하는 것을 특징으로 한다.Bicycle transmission device of the present invention for achieving the above object, the sprocket support unit rotatably supported on the hub shaft unit to which the wheel of the bike is coupled, the plurality of sprockets are supported on the outside; A latch unit installed between the hub shaft unit and the sprocket support unit to allow rotation of the sprocket support unit in one direction and to suppress rotation in the other direction; And a latch control unit for selectively controlling the latch unit to allow free rotation of the sprocket support unit with respect to the hub shaft unit in the other direction so that gear shifting is possible in a stopped state. do.
여기서, 상기 래치 유닛은, 상기 허브축유닛의 단부 외주측에 움직임 가능하게 설치되는 래치와; 상기 래치가 눌린 상태에서 외측으로 돌출되도록 탄성 지지하는 탄성부재; 및 상기 래치에 마주하도록 상기 스프라켓 지지유닛의 내주에 설치되며, 상기 스프라켓 지지유닛이 상기 타방향으로 회전시 상기 래치가 걸리도록 하는 래치 걸림구를 가지는 래치 간섭부;를 포함하는 것이 바람직하다.The latch unit may include a latch movably installed at an outer circumferential side of the hub shaft unit; An elastic member for elastically supporting the latch so as to protrude outwardly; And a latch interference part disposed on an inner circumference of the sprocket support unit so as to face the latch and having a latch catching hole for engaging the latch when the sprocket support unit rotates in the other direction.
또한, 상기 래치 유닛은, 상기 허브축유닛의 단부에 결합되어 상기 스프라켓 지지유닛이 상기 허브축 유닛에서 이탈되는 것을 방지하며, 그 외주에서 상기 래치를 지지하는 래치 지지캡을 더 포함하는 것이 좋다.The latch unit may further include a latch support cap coupled to an end of the hub shaft unit to prevent the sprocket support unit from being separated from the hub shaft unit, and supporting the latch at an outer circumference thereof.
또한, 상기 래치 제어유닛은, 상기 래치의 측면으로 돌출되게 설치되는 가이드돌기와; 상기 가이드돌기가 끼워져 결합되며 회전시 상기 가이드돌기의 위치를 제어하는 캠부를 가지며, 상기 래치 지지캡과 함께 회전 가능하고, 상대적으로도 회전 가능하도록 상기 래치 지지캡에 연결되는 캠판과; 상기 캠판에 마찰력을 선택적으로 제공하여 상기 캠판이 상기 래치 지지캡에 대해 상대적으로 회전되도록 하는 마찰력 제공부;를 포함하며, 상기 캠판에 마찰력이 제공되어 상기 래치가 회전하면, 상기 캠부를 따라 상기 가이드돌기의 위치가 변경되어 상기 래치가 상기 래치 간섭구를 벗어나도록 자세변경된 상태를 유지하여 상기 스프라켓 지지유닛이 상기 타방향으로 자유회전 가능한 것이 좋다.The latch control unit may further include: a guide protrusion installed to protrude toward the side of the latch; A cam plate coupled to the guide protrusion and having a cam portion for controlling the position of the guide protrusion during rotation, the cam plate being rotatable with the latch support cap and connected to the latch support cap so as to be relatively rotatable; And a frictional force providing unit for selectively providing a friction force to the cam plate so that the cam plate is rotated relative to the latch support cap. When the latch is rotated by providing a frictional force to the cam plate, the guide is provided along the cam unit. It is preferable that the sprocket support unit is freely rotatable in the other direction by changing the position of the projection so that the latch is changed in posture so as to escape the latch interference hole.
또한, 상기 래치 제어유닛은, 상기 캠판이 상기 래치 지지캡에 대해 상대적으로 회전되는 범위를 제한하도록 상기 캠판과 상기 래치 지지캡 사이에 설치되는 회전각 제한부;를 더 포함하는 것이 좋다.The latch control unit may further include a rotation angle limiter disposed between the cam plate and the latch support cap to limit a range in which the cam plate is rotated relative to the latch support cap.
또한, 상기 래치 제어유닛은, 상기 캠판이 상기 래치 지지캡에서 분리되는 것을 방지하기 위한 고정부재를 더 포함하는 것이 좋다.The latch control unit may further include a fixing member for preventing the cam plate from being separated from the latch support cap.
또한, 상기 래치 간섭부는, 상기 스프라켓 지지유닛의 내주에 일체로 형성된 것이 좋다.In addition, the latch interference portion is preferably formed integrally on the inner circumference of the sprocket support unit.
또한, 상기 스프라켓 지지유닛은, 상기 허브축 유닛의 외측에 베어링에 의해 회전 가능하게 지지되며, 외주에 다수의 스프라켓이 끼워져 결합되는 스프라켓 지지하우징; 및 상기 스프라켓 지지하우징의 단부에 체결되어, 상기 스프라켓 지지하우징에 결합된 스프라켓의 이탈을 방지하는 이탈방지캡;을 포함하며, 상기 래치 간섭부는 상기 이탈방지캡에 설치되는 것이 좋다.In addition, the sprocket support unit, the sprocket support housing is rotatably supported by a bearing on the outside of the hub shaft unit, a plurality of sprockets are fitted to the outer periphery; And a release preventing cap which is fastened to an end of the sprocket support housing and prevents detachment of the sprocket coupled to the sprocket support housing, wherein the latch interference part is installed at the release preventing cap.
본 발명의 자전거 변속장치에 따르면, 주행하는 동안에 기어 변속을 할 수 있는 것은 물론이고, 정지 상태에서도 기어 변속이 가능하다.According to the bicycle transmission device of the present invention, not only can the gear shifting while driving, but also the gear shifting in the stationary state.
따라서, 평지를 주행하다가 갑자기 오르막길을 주행할 경우와 같이 저속으로 주행하는 상태에서도 기어변속을 용이하게 할 수 있게 됨으로써, 자전거를 보다 편리하게 이용할 수 있게 된다.Therefore, the gear shift can be easily performed even in a state of driving at a low speed, such as when driving on a flat road and driving uphill suddenly, so that the bicycle can be used more conveniently.
도 1은 본 발명의 실시예에 따른 자전거의 변속장치를 나타내 보인 분리사시도이다.1 is an exploded perspective view showing a shift of the bicycle according to an embodiment of the present invention.
도 2a는 도 1에 도시된 자전거의 변속장치의 결합단면도이다.FIG. 2A is a cross-sectional view of the transmission of the bicycle shown in FIG.
도 2b는 도 1에 도시된 래치유닛을 발췌하여 보인 사시도이다.FIG. 2B is a perspective view of the latch unit illustrated in FIG. 1.
도 3은 도 2a의 상태에서의 자전거의 변속장치를 나타내 보인 정면도이다.3 is a front view showing the transmission of the bicycle in the state of Figure 2a.
도 4 및 도 5 각각은 정지 상태에서 기어변속 가능한 상태를 설명하기 위한 도면이다.4 and 5 are diagrams for explaining a state in which gear shift is possible in the stationary state.
도 6 및 도 7은 본 발명의 다른 실시예에 따른 자전거의 변속장치를 설명하기 위한 도면이다.6 and 7 are views for explaining a transmission device of a bicycle according to another embodiment of the present invention.
이하 첨부된 도면을 참조하여 본 발명의 실시예에 따른 자전거 변속장치를 자세히 설명하기로 한다.Hereinafter, a bicycle transmission apparatus according to an exemplary embodiment of the present invention will be described in detail with reference to the accompanying drawings.
도 1 내지 도 5를 참조하면, 본 발명의 실시예에 따른 자전거 변속장치(10)는, 자전거의 바퀴가 결합되는 허브축 유닛(20)에 회전 가능하게 지지되며 외측에 복수의 스프라켓(30)이 지지되는 스프라켓 지지유닛(40), 허브축유닛(20)과 스프라켓 지지유닛(40) 사이에 설치되는 래치 유닛(50) 및 래치 제어유닛(60)을 구비한다.1 to 5, the bicycle transmission apparatus 10 according to the embodiment of the present invention is rotatably supported by the hub shaft unit 20 to which the wheels of the bicycle are coupled, and a plurality of sprockets 30 on the outside. And a latch unit 50 and a latch control unit 60 installed between the sprocket support unit 40, the hub shaft unit 20, and the sprocket support unit 40.
여기서 상기 허브축 유닛(20)은 허브축 몸체(21)와, 허브축 몸체(21)의 일단부에 결합되는 베어링 지지부재(23)를 구비한다. 허브축 몸체(21)는 중공축(21a)과, 중공축(21a)에서 서로 이격되게 설치되는 플랜지부(21b)를 가진다. 중공축(21a)의 일단에는 베어링 지지부재(23)가 체결되도록 나사선이 형성된다.Here, the hub shaft unit 20 includes a hub shaft body 21 and a bearing support member 23 coupled to one end of the hub shaft body 21. The hub shaft body 21 has a hollow shaft 21a and a flange portion 21b spaced apart from each other at the hollow shaft 21a. One end of the hollow shaft 21a is formed with a screw line to fasten the bearing support member 23.
상기 베어링 지지부재(23)는 원통형상으로, 그 외주에 지지베어링(70)이 설치되며, 일단 내주면에는 상기 중공축(21a)에 나사 결합되는 나사선이 형성되고, 타단부의 외주에는 후술할 래치 지지캡(51)이 나사 결합될 수 있도록 나사선이 형성된 나사결합부(23a)가 형성된다. 이러한 베어링 지지부재(23)는 허브축 몸체(21)와 일체로 형성될 수도 있고, 별도의 부품으로 제작되어 결합 될 수도 있다.The bearing support member 23 has a cylindrical shape, and a support bearing 70 is installed at an outer circumference thereof, and a screw thread screwed to the hollow shaft 21a is formed at one inner circumferential surface thereof, and a latch to be described later on the outer circumference of the other end thereof. A screw engaging portion 23a having a screw line is formed so that the support cap 51 can be screwed. The bearing support member 23 may be integrally formed with the hub shaft body 21, or may be manufactured and combined as a separate component.
상기 스프라켓 지지유닛(40)과 허브축 유닛(20)의 베어링 지지부재(23) 사이에는 지지베어링(70)이 설치된다. 스프라켓 지지유닛(40)은 외주에 다수의 스프라켓(30)이 끼워져 지지되는 스프라켓 지지하우징(41)과, 스프라켓 지지하우징(41)의 단부에 결합되어 결합된 스프라켓(30)의 이탈을 방지하는 이탈방지캡(43)을 구비한다. 스프라켓 지지하우징(41)의 외주에는 결합된 스프라켓(30)의 자유로운 회전을 방지하기 위해 걸림턱이 일정한 패턴으로 형성된다. 이탈방지캡(43)은 스프라켓 지지하우징(41)의 단부에 나사 결합되는 링 형상을 가지며, 스프라켓 지지하우징(41)의 외주로 돌출되게 설치된다.A support bearing 70 is installed between the sprocket support unit 40 and the bearing support member 23 of the hub shaft unit 20. The sprocket support unit 40 is separated from the sprocket support housing 41 in which a plurality of sprockets 30 are inserted and supported on the outer circumference and the sprocket 30 coupled to an end of the sprocket support housing 41 to prevent the sprocket 30 from being separated. The prevention cap 43 is provided. On the outer circumference of the sprocket support housing 41, the locking jaw is formed in a predetermined pattern to prevent free rotation of the sprocket 30 coupled thereto. The separation prevention cap 43 has a ring shape that is screwed to the end of the sprocket support housing 41, and is installed to protrude to the outer circumference of the sprocket support housing 41.
또한, 상기 스프라켓 지지유닛(40)의 내주 즉, 구체적으로는 스프라켓 지지하우징(41)의 내주에는 후술할 래치 간섭부(57)가 설치되며, 이 래치 간섭부(57)에는 후술할 래치(53)가 걸리는 래치 간섭구(57a)가 형성된다.In addition, a latch interferer 57, which will be described later, is installed on an inner circumference of the sprocket support unit 40, that is, an inner circumference of the sprocket support housing 41, and a latch 53 to be described later. Latch interference hole 57a is formed.
상기 구성을 가지는 스프라켓 지지유닛(40)은 일방향(A; 자전거 바퀴 주행방향의 반대방향)으로는 자유회전 가능하며, 타방향(B: 자전거 바퀴 주행방향)으로의 자유 회전은 래치 유닛(50)에 의해 선택적으로 제한된다. Sprocket support unit 40 having the above configuration can be freely rotated in one direction (A (opposite direction of the bicycle wheel driving direction), free rotation in the other direction (B: bicycle wheel driving direction) is latch unit 50 Is optionally limited.
상기 래치 유닛(50)은 스프라켓 지지유닛(40)의 일방향(A)으로의 회전을 허용하고, 타방향(B)으로의 회전을 선택적으로 제한한다. 이러한 래치 유닛(50)은, 허브축 유닛(20)의 베어링 지지부재(23)의 단부 외주에 결합되는 래치 지지캡(51)과, 래치 지지캡(51)의 외측에 움직임 가능하게 설치되는 래치(53)와, 래치(53)가 눌린 상태에서 외측으로 돌출되도록 탄성 지지하는 탄성부재(55) 및, 래치 간섭부(57)를 구비한다.The latch unit 50 allows rotation of the sprocket support unit 40 in one direction A and selectively restricts rotation in the other direction B. As shown in FIG. The latch unit 50 includes a latch support cap 51 coupled to an outer circumference of the end of the bearing support member 23 of the hub shaft unit 20, and a latch movably installed outside the latch support cap 51. 53, an elastic member 55 for elastically supporting so as to protrude outward in the pressed state of the latch 53, and a latch interference portion 57.
상기 래치 지지캡(51)은 베어링 지지부재(23)의 일측 단부에 나사 결합됨으로써, 스프라켓 지지유닛(40) 및 지지베어링(70)이 허브축 유닛(20)에서 분리되지 못하도록 하는 역할을 한다. 래치 지지캡(51)의 캡 몸체(51a)의 외주에는 래치(53)가 안착되는 래치 안착홈(51b)이 외주로부터 인입되게 형성된다. 또한, 캡 몸체(51a)의 외주에는 원주 방향으로 상기 탄성부재(55)가 지지되는 환형홈(51c)이 형성된다. 또한, 캡 몸체(51a)의 일측으로 후술할 캠판(62)이 지지되는 지지턱(51d)이 연장 형성된다.The latch support cap 51 is screwed to one end of the bearing support member 23, thereby preventing the sprocket support unit 40 and the support bearing 70 from being separated from the hub shaft unit 20. On the outer circumference of the cap body 51a of the latch support cap 51, a latch seating groove 51b on which the latch 53 is seated is formed to be pulled out from the outer circumference. In addition, an outer circumference of the cap body 51a is formed with an annular groove 51c in which the elastic member 55 is supported in the circumferential direction. In addition, the support jaw 51d on which the cam plate 62 to be described later is supported is formed on one side of the cap body 51a.
상기 래치(53)는 래치 지지캡(51)의 외주에 형성된 래치 안착홈(51b)에 수용되도록 설치되며, 래치 안착홈(51b) 내에서 소정 각도 회동되도록 설치되어, 자세 변경되면서 상기 래치 간섭부(57)에 형성되는 래치 걸림구(57a)에 걸리거나 벗어나도록 움직일 수 있다. 즉, 래치(53)는 래치 지지캡(51)의 외주로부터 돌출되는 자세(도 2a 및 도 3)에서는 래치 걸림구(57a)에 걸려서 스프라켓 지지유닛(40)이 일방향(A)으로 자유회전 하지 못하고, 허브축 유닛(20)과 함께 회전되도록 제한하고, 타방향(B)으로는 래치 걸림구(57a)에 간섭되어 탄력적으로 눌려지면서 스프라켓 지지유닛(40)이 래치(53)에 걸리지 않고 자유회전될 수 있도록 한다. 이를 위해 래치(53)는 탄성부재(55)에 의해 탄력적으로 지지되어, 래치 걸림구(57a)에 밀착되는 방향으로 탄력적으로 지지된다.The latch 53 is installed to be received in the latch seating groove 51b formed on the outer circumference of the latch support cap 51, and is installed to rotate at a predetermined angle within the latch seating groove 51b, and the attitude of the latch interferer is changed. It can be moved to engage or escape the latch latch (57a) formed in the (57). That is, the latch 53 is caught in the latch latch 57a in the posture (FIGS. 2A and 3) protruding from the outer circumference of the latch support cap 51 so that the sprocket support unit 40 does not freely rotate in one direction A. FIG. In this case, the sprocket support unit 40 is not caught by the latch 53 and freely restrained to be rotated together with the hub shaft unit 20, while being elastically pressed in the other direction (B) by interfering with the latch latch 57a. Allow it to rotate. To this end, the latch 53 is elastically supported by the elastic member 55, and is elastically supported in a direction in close contact with the latch latch 57a.
상기 탄성부재(55)는 지지캡(51)의 환형홈(51c)에 끼워진 상태로 래치(53)를 지지하는 탄성링을 포함하며, 래치(53)의 중앙부분에는 탄성부재(55)가 끼워져 지지되는 슬롯(55a)이 형성된다.The elastic member 55 includes an elastic ring for supporting the latch 53 in a state of being fitted into the annular groove 51c of the support cap 51, and the elastic member 55 is inserted into a central portion of the latch 53. Supported slots 55a are formed.
상기 래치 간섭부(57)는 래치 지지캡(51)의 외주에 대응되는 스프라켓 지지유닛(40)의 내주에 설치되며, 래치(53)의 끝단이 걸리는 래치 간섭구(57a)가 원주 방향으로 일정 간격으로 형성된다. 이러한 래치 간섭부(57)는 링 형상을 가지며, 스프라켓 지지유닛(40)의 내주에 설치될 수도 있고, 바람직하게는 스프라켓 지지유닛(40)의 내주에 일체로 형성될 수도 있다.The latch interference portion 57 is installed on the inner circumference of the sprocket support unit 40 corresponding to the outer circumference of the latch support cap 51, and the latch interference hole 57a at which the end of the latch 53 is caught is fixed in the circumferential direction. Formed at intervals. The latch interference portion 57 has a ring shape, may be installed on the inner circumference of the sprocket support unit 40, and preferably may be integrally formed on the inner circumference of the sprocket support unit 40.
상기 래치 제어유닛(60)은 래치 유닛(50)을 선택적으로 제어하여, 상기 타방향(B)으로도 허브축 유닛(20)에 대해 스프라켓 지지유닛(40)의 자유회전이 가능하도록 하여 정지 상태에서 기어 변속이 가능하도록 하기 위한 것이다.The latch control unit 60 selectively controls the latch unit 50 to allow free rotation of the sprocket support unit 40 with respect to the hub shaft unit 20 also in the other direction B. This is to allow gear shifting at.
이러한 래치 제어유닛(60)은 래치(53)의 측면으로 돌출되게 설치되는 가이드돌기(61)와, 캠판(62), 회전각 제한부(63), 고정부재(64) 및 마찰력 제공부(65)를 구비한다.The latch control unit 60 includes a guide protrusion 61 installed to protrude toward the side of the latch 53, a cam plate 62, a rotation angle limiter 63, a fixing member 64, and a frictional force providing unit 65. ).
상기 가이드돌기(61)는 래치(53)의 측면으로 돌출되게 설치된다. 이러한 가이드돌기(61)는 래치(53)와 일체로 형성될 수도 있고, 별도의 핀을 래치(53)에 홀을 가공한 후 압입하여 설치하여 마련될 수도 있다.The guide protrusion 61 is installed to protrude toward the side of the latch 53. The guide protrusion 61 may be formed integrally with the latch 53, or may be provided by inserting a separate pin after pressing a hole into the latch 53.
상기 캠판(62)은 가이드돌기(61)가 끼워져 결합되며 회전시 가이드돌기(61)의 위치를 제어하는 캠부(62a)가 래치(53)에 마주하는 일면에 형성된다. 이러한 캠판(62)은 래치 지지캡(51)에 대해 상대적으로 회전 가능하도록 상기 래치 지지캡(51)에 연결된다. 캠부(62a)는 캠판(62)의 회전시 가이드돌기(61)를 가이드하여 위치제어함으로써, 래치(53)가 래치 지지캡(51)의 외주에서 돌출되거나 눕혀진 상태를 유지하도록 한다. 따라서 가이드돌기(61)가 캠부(62a)에 의해 가이드되어 회전중심 쪽으로 최대한 이동하게 되면, 래치(53)가 누운 자세(도 4 및 도 5의 상태)로 유지됨으로써, 래치 간섭부(57)와 접촉이 이루어지지 않게 되어, 스프라켓 지지유닛(40)이 타방향(B)으로도 자유회전 가능한 상태가 될 수 있다. 그리고 캠판(62)에 외력(마찰력)이 가해지지 않는 상태에서는 탄성부재(55)의 탄성복원력에 의해 래치(53)가 원위치(선 자세)로 복귀되면서 가이드돌기(61)도 회전중심에서 최대한 먼 거리에 위치되고, 캠판(62)도 소정 각도 피동회전되어 자세 변경될 수 있게 된다.The cam plate 62 is formed on one surface of which the guide protrusion 61 is fitted and coupled, and the cam portion 62a for controlling the position of the guide protrusion 61 is rotated to face the latch 53. The cam plate 62 is connected to the latch support cap 51 so as to be rotatable relative to the latch support cap 51. The cam part 62a guides and positions the guide protrusion 61 when the cam plate 62 rotates to maintain the latch 53 protruding or lying down from the outer circumference of the latch support cap 51. Therefore, when the guide protrusion 61 is guided by the cam portion 62a and moved to the center of rotation as much as possible, the latch 53 is held in a lying position (states of FIGS. 4 and 5), thereby allowing the latch interference portion 57 and Since the contact is not made, the sprocket support unit 40 may be freely rotated in the other direction (B). In the state where no external force (friction force) is applied to the cam plate 62, the latch 53 is returned to its original position (line position) by the elastic restoring force of the elastic member 55, and the guide protrusion 61 is also as far as possible from the center of rotation. Located at a distance, the cam plate 62 can also be driven at a predetermined angle to change the attitude.
여기서, 캠판(62)이 래치 지지캡(51)에서의 상대적으로 회전각도를 제한하기 위해 상기 회전각 제한부(63)가 더 구비되는 것이 바람직하다. 회전각 제한부(63)는 캠판(62)의 내주에 형성되는 걸림턱(63a)과, 래치 지지캡(51)의 외주에 형성되는 스토퍼부(63b)를 구비한다. 캠판(62)이 소정 각도 범위 내에서만 회전될 수 있도록 걸림턱(63a)과 스토퍼부(63b)가 간섭됨으로써, 캠판(62)에 큰 외력(마찰력)이 가해지더라도 정해지 각도 이상으로 회전되는 것이 방지됨으로써, 캠판(62)을 통해 래치(53)에 부하가 발생되도록 하는 것을 근본적으로 해결할 수 있게 된다. 따라서 래치(53)의 고장이나 변형을 방지할 수 있게 된다.Here, it is preferable that the rotation angle limiting portion 63 is further provided in order for the cam plate 62 to limit the rotation angle relative to the latch support cap 51. The rotation angle limiter 63 includes a locking jaw 63a formed at the inner circumference of the cam plate 62 and a stopper portion 63b formed at the outer circumference of the latch support cap 51. The locking jaw 63a and the stopper portion 63b interfere with each other so that the cam plate 62 can be rotated only within a predetermined angle range, so that even if a large external force (friction force) is applied to the cam plate 62, the cam plate 62 is rotated more than the determined angle. By being prevented, it is possible to fundamentally solve that the load is generated in the latch 53 through the cam plate 62. Therefore, failure or deformation of the latch 53 can be prevented.
상기 고정부재(64)는 래치 지지캡(51)에 설치되어, 캠판(62)이 래치 지지캡(51)에서 분리되지 못하도록 고정시킨다. 이러한 고정부재(64)는 래치 지지캡(51)의 외주에 탄력적으로 결합되는 스냅링을 포함하는 것이 바람직하다.The fixing member 64 is installed on the latch support cap 51 to fix the cam plate 62 so as not to be separated from the latch support cap 51. The fixing member 64 preferably includes a snap ring that is elastically coupled to the outer circumference of the latch support cap 51.
상기 마찰력 제공부(65)는 캠판(62)에 마찰력을 선택적으로 제공하여 캠판(62)이 래치 지지캡(51)과 일체로 회전하지 않고 독립적으로 회전되도록 즉, 래치 지지캡(51)에 대해 상대적으로 회전되도록 하기 위한 것이다. 이러한 마찰력 제공부(65)는, 중심축(1)에 설치되는 지지브라켓(65a)에 움직임 가능하게 설치되는 마찰부재(65b) 및 마찰부재(65b)에 연결되어 마찰부재(65b)를 가동시키는 와이어(65c)를 구비한다. 중심축(1)은 허브축 유닛(20)의 중심을 통과하도록 설치되며, 허브축 유닛(20)에 대해 상대적으로 회전 가능하도록 베어링에 의해 지지된다. 이러한 중심축(1)에 상기 지지브라켓(65a)이 고정 설치되고, 그 지지브라켓(65a)에 마찰부재(65b)가 움직임 가능하게 설치된다. 이 마찰부재(65b)는 예를 들어, 지지브라켓(65a)에 회동 가능하게 연결될 수도 있고, 왕복 슬라이딩 가능하게 설치될 수도 있다. 그리고 마찰부재(65b)는 와이어(65c)의 당김 및 당김 해제 동작에 의해서 연동되면서 캠판(62)에 선택적으로 접촉 가압되거나, 접촉 가압이 해지된다.The friction force providing unit 65 selectively provides the friction force to the cam plate 62 so that the cam plate 62 rotates independently without integrally rotating with the latch support cap 51, that is, with respect to the latch support cap 51. It is intended to be rotated relatively. The friction force providing unit 65 is connected to the friction member 65b and the friction member 65b movably installed on the support bracket 65a installed on the central shaft 1 to move the friction member 65b. A wire 65c is provided. The central shaft 1 is installed to pass through the center of the hub shaft unit 20 and is supported by a bearing so as to be rotatable relative to the hub shaft unit 20. The support bracket 65a is fixedly installed on the central shaft 1, and the friction member 65b is installed on the support bracket 65a to be movable. The friction member 65b may be rotatably connected to the support bracket 65a, for example, or may be installed to reciprocally slide. Then, the friction member 65b is selectively contacted or pressurized by the cam plate 62 while being interlocked by the pulling and pulling release operation of the wire 65c, or the contact pressurization is released.
상기 마찰부재(65b)가 도 2a와 같이 캠판(62)에서 분리된 상태에서는 래치(53)가 정상적으로 동작되는 상태로서, 스프라켓 지지유닛(40)은 일방향(A)으로의 자유 회전이 제한된다.In the state in which the friction member 65b is separated from the cam plate 62 as shown in FIG. 2A, the latch 53 is normally operated. The sprocket support unit 40 is restricted in free rotation in one direction A. FIG.
반대로, 도 4와 같이, 마찰부재(65b)가 캠판(62)에 밀착되어 마찰력을 제공하면, 그 마찰력에 의해서 캠판(62)이 소정 각도 래치 지지캡(51)에 대해 상대적으로 회전되면서 래치(53)를 도 5와 같이 눕혀진 상태가 되도록 한다. 따라서 이 상태에서는 스프라켓 지지유닛(40)이 허브축 유닛(20)에 대해 타방향(B)으로도 자유회전 가능한 상태가 됨으로써, 정지 상태에서의 기어변속이 가능하게 된다.On the contrary, as shown in FIG. 4, when the friction member 65b comes into close contact with the cam plate 62 to provide a friction force, the cam plate 62 is rotated relative to the predetermined angle latch support cap 51 by the friction force. 53) to be in a lying state as shown in FIG. 5. Therefore, in this state, the sprocket support unit 40 becomes freely rotatable also in the other direction B with respect to the hub shaft unit 20, thereby enabling gear shifting in the stationary state.
상기 와이어(65c)는 마찰부재(65b)에 연결된 상태로, 와이어 조작부(미도시)의 동작에 의해 마찰부재(65b)를 캠판(62)에 밀착되도록 가압하거나, 가압력을 가하지 않는 초기위치로 복귀되도록 하여 마찰부재(65b)와 캠판(62)이 분리되도록 할 수 있다. 여기서 상기 와이어 조작부는 자전거 핸들에 설치되는 조작레버 등을 포함할 수 있으며, 이러한 와이어 조작부, 와이어(65c) 및 마찰부재(65b)의 구성은 자전거에 널리 적용되는 기어변속 레버 및 와이어의 구조 또는 브레이크 레버 및 와이어의 구성으로부터 용이하게 적용할 수 있는 것이므로 더 이상의 자세한 설명은 생략한다. 그리고 이러한 마찰력 제공부(65)의 구체적인 구성이 본 발명을 한정하는 것이 아니며, 다양한 실시예가 가능한 것으로 이해되어야 한다.The wire 65c is connected to the friction member 65b to press the friction member 65b to closely contact the cam plate 62 by an operation of a wire operation unit (not shown), or to return to an initial position where no pressing force is applied. The friction member 65b and the cam plate 62 may be separated from each other. Here, the wire operation unit may include an operation lever installed on a bicycle handle, and the like. The configuration of the wire operation unit, the wire 65c, and the friction member 65b may be a structure or a brake of a gear shift lever and a wire widely applied to a bicycle. Since it is easily applicable from the configuration of the lever and the wire, further detailed description will be omitted. And the specific configuration of the frictional force providing unit 65 is not intended to limit the present invention, it should be understood that various embodiments are possible.
이하 상기 구성을 가지는 본 발명의 실시예에 따른 자전거 변속기의 작용효과에 대해서 자세히 설명하기로 한다.Hereinafter will be described in detail the operation and effect of the bicycle transmission according to an embodiment of the present invention having the above configuration.
먼저, 도 2a 및 도 3은 주행상태를 나타내 보인 것으로서, 이 상태에서는 래치(53)가 정상적으로 동작을 하게 됨으로써, 스프라켓 지지유닛(40)은 일방향(A)으로는 허브축 유닛(20)에 대해 상대적으로 자유회전 가능하며, 타방향(B)으로는 허브축 유닛(20)과 일체로 회전되도록 래치(53)에 의해 구속된다. 따라서 이러한 상태에서는 주행 중에 기어 변속장치를 이용하여 체인을 위치 이동시켜서 기어 변속 가능하도록 할 수 있으며, 자전거 페달을 밟으면, 그 동력이 스프라켓 지지유닛(40)을 통해 허브축 유닛(20)으로 전달되어 자전거 바퀴를 회전시킬 수 있게 된다.First, FIGS. 2A and 3 illustrate a driving state. In this state, the latch 53 operates normally, so that the sprocket support unit 40 is in one direction A with respect to the hub shaft unit 20. It is relatively freely rotatable and is restrained by the latch 53 so as to rotate integrally with the hub shaft unit 20 in the other direction (B). Therefore, in this state, it is possible to shift the chain by shifting the chain using the gear transmission during driving, and when the pedal is pressed, the power is transmitted to the hub shaft unit 20 through the sprocket support unit 40. You can rotate the bicycle wheels.
한편, 상기와 같은 상태로 자전거를 이용하다가, 정지 상태에서 기어 변속을 하고자 할 경우에는, 마찰력 제공부(65)를 동작시켜서 도 4 및 도 5에 도시된 바와 같이, 캠판(62)으로 마찰부재(65b)를 밀착시켜서 캠판(62)에 마찰력을 제공한다.On the other hand, when using the bicycle in the above state, when the gear shift in the stationary state, by operating the frictional force providing unit 65, as shown in Figure 4 and 5, the friction member to the cam plate 62 65b is brought into close contact with each other to provide a friction force to the cam plate 62.
이 상태에서 자전거 페달을 주행 방향으로 회전시키면, 체인의 힘에 의해 스프라켓 지지유닛(40)에 회전력이 전달되어 회전되며, 이때 캠판(62)의 캠부(62a)의 길이 정도만큼만 미세하게 자전거를 움직여 주면, 캠판(62)은 마찰부재(65b)에 밀착되어 움직이지 않고 스프라켓 지지유닛(40)과 허브축 유닛(20)이 캠판(62)에 대해 독립적으로 회전된다. 이러한 동작에 의해서, 가이드돌기(61)는 캠부(62a)에 의해 가이드되어, 도 4 및 도 5의 위치로 이동되고, 따라서 래치(53)는 래치 간섭구(57a)에서 벗어남으로써, 스프라켓 지지유닛(40)이 타방향(B)으로도 자유 회전 가능한 상태가 된다. 이와 같이, 정지된 상태에서, 스프라켓 지지유닛(40)이 타방향(B)으로도 자유회전 가능하게 되면, 정지 상태에서 기어 변속을 할 수 있게 된다.In this state, when the bicycle pedal is rotated in the driving direction, the rotational force is transmitted to the sprocket support unit 40 by the force of the chain and is rotated. At this time, the bicycle is moved finely by the length of the cam portion 62a of the cam plate 62. The main plate, the cam plate 62 is in close contact with the friction member 65b, and the sprocket support unit 40 and the hub shaft unit 20 are rotated independently of the cam plate 62 without moving. By this operation, the guide protrusion 61 is guided by the cam portion 62a and moved to the position in Figs. 4 and 5, and thus the latch 53 is released from the latch interference hole 57a, thereby providing a sprocket support unit. 40 is also in a state capable of free rotation in the other direction (B). As such, when the sprocket support unit 40 is freely rotatable in the other direction B in the stopped state, the gear shift can be performed in the stopped state.
그리고 기어 변속이 끝난 뒤에, 상기 마찰부재(65b)를 캠판(62)에서 분리하면, 래치(53)는 탄성부재(55)의 탄성력에 의해 초기위치(도 2a 및 도 3의 상태)로 자연스럽게 복귀됨으로써, 스프라켓 지지유닛(40)은 다시 타방향(B)으로의 자유회전이 불가한 상태가 된다.When the friction member 65b is removed from the cam plate 62 after the gear shift is completed, the latch 53 naturally returns to the initial position (states of FIGS. 2A and 3) by the elastic force of the elastic member 55. As a result, the sprocket support unit 40 is in a state where free rotation in the other direction B is impossible again.
한편, 도 6 및 도 7에 도시된 바와 같이, 본 발명의 다른 실시예에 따르면, 래치(53)가 선택적으로 구속되는 래치 간섭부(57')가 상기 스프라켓 지지유닛(40)의 이탈방지캡(43')에 일체로 형성될 수도 있다. 이 경우, 이탈방지캡(43')은 스프라켓 지지하우징(41)의 단부의 외주면 또는 내주면에 나사 결합되며, 외주면 및 내주면 각각을 덮도록 형성된 구조를 가질 수 있다.On the other hand, as shown in Figure 6 and 7, according to another embodiment of the present invention, the latch interference portion 57 ′ where the latch 53 is selectively restrained is the cap of the separation of the sprocket support unit 40 It may be formed integrally with 43 '. In this case, the release preventing cap 43 'is screwed to the outer circumferential surface or the inner circumferential surface of the end of the sprocket support housing 41, may have a structure formed to cover each of the outer circumferential surface and the inner circumferential surface.
이상, 본 발명을 본 발명의 원리를 예시하기 위한 바람직한 실시예와 관련하여 도시하고 설명하였으나, 본 발명은 그와 같이 도시되고 설명된 그대로의 구성 및 작용으로 한정되는 것이 아니다. 오히려 첨부된 특허청구범위의 사상 및 범위를 일탈함이 없이 본 발명에 대한 다수의 변경 및 수정이 가능함을 당업자들은 잘 이해할 수 있을 것이다.While the invention has been shown and described in connection with preferred embodiments for illustrating the principles of the invention, the invention is not limited to the construction and operation as shown and described. Rather, those skilled in the art will appreciate that many modifications and variations of the present invention are possible without departing from the spirit and scope of the appended claims.
[부호의 설명][Description of the code]
20..허브축 유닛 30..스프라켓20.Hub shaft unit 30.Sprocket
40..스프라켓 지지유닛 50..래치 유닛40..Sprocket Support Unit 50..Latch Unit
60..래치 제어유닛 70..지지베어링60. Latch control unit 70. Support bearing

Claims (7)

  1. 자전거의 바퀴가 결합되는 허브축 유닛에 회전 가능하게 지지되며, 외측에 복수의 스프라켓이 지지되는 스프라켓 지지유닛;A sprocket support unit rotatably supported by a hub shaft unit to which the wheels of the bicycle are coupled, and having a plurality of sprockets supported on the outside thereof;
    상기 허브축 유닛과 상기 스프라켓 지지유닛 사이에 설치되어, 상기 스프라켓 지지유닛의 일방향으로의 회전을 허용하고, 타방향으로의 회전을 억제하는 래치 유닛과;A latch unit installed between the hub shaft unit and the sprocket support unit to allow rotation of the sprocket support unit in one direction and to suppress rotation in the other direction;
    상기 래치 유닛을 선택적으로 제어하여, 상기 타방향으로도 상기 허브축 유닛에 대해 상기 스프라켓 지지유닛의 자유회전이 가능하도록 하여 정지 상태에서 기어 변속이 가능하도록 하는 래치 제어유닛;을 포함하며,And a latch control unit for selectively controlling the latch unit to allow free rotation of the sprocket support unit with respect to the hub shaft unit in the other direction so that gear shifting is possible in a stopped state.
    상기 래치 유닛은,The latch unit,
    상기 허브축 유닛의 단부 외주측에 움직임 가능하게 설치되는 래치와;A latch movably installed on an outer circumferential side of the hub shaft unit;
    상기 래치가 눌린 상태에서 외측으로 돌출되도록 탄성 지지하는 탄성부재; 및An elastic member for elastically supporting the latch so as to protrude outwardly; And
    상기 래치에 마주하도록 상기 스프라켓 지지유닛의 내주에 설치되며, 상기 스프라켓 지지유닛이 상기 타방향으로 회전시 상기 래치가 걸리도록 하는 래치 걸림구를 가지는 래치 간섭부;를 포함하는 것을 특징으로 하는 자전거의 변속장치.And a latch interference part installed on an inner circumference of the sprocket support unit so as to face the latch and having a latch catching hole for engaging the latch when the sprocket support unit rotates in the other direction. Gearbox.
  2. 제1항에 있어서, 상기 래치 유닛은,The method of claim 1, wherein the latch unit,
    상기 허브축 유닛의 단부에 결합되어 상기 스프라켓 지지유닛이 상기 허브축 유닛에서 이탈되는 것을 방지하며, 그 외주에서 상기 래치를 지지하는 래치 지지캡을 더 포함하는 것을 특징으로 하는 자전거의 변속장치.And a latch support cap coupled to an end of the hub shaft unit to prevent the sprocket support unit from being detached from the hub shaft unit and supporting the latch at an outer circumference thereof.
  3. 제2항에 있어서, 상기 래치 제어유닛은,The method of claim 2, wherein the latch control unit,
    상기 래치의 측면으로 돌출되게 설치되는 가이드돌기와;A guide protrusion installed to protrude to the side of the latch;
    상기 가이드돌기가 끼워져 결합되며 회전시 상기 가이드돌기의 위치를 제어하는 캠부를 가지며, 상기 래치 지지캡과 함께 회전 가능하고, 상대적으로도 회전 가능하도록 상기 래치 지지캡에 연결되는 캠판과;A cam plate coupled to the guide protrusion and having a cam portion for controlling the position of the guide protrusion during rotation, the cam plate being rotatable with the latch support cap and connected to the latch support cap so as to be relatively rotatable;
    상기 캠판에 마찰력을 선택적으로 제공하여 상기 캠판이 상기 래치 지지캡에 대해 상대적으로 회전되도록 하는 마찰력 제공부;를 포함하며,And a frictional force providing unit selectively providing the frictional force to the cam plate such that the cam plate is rotated relative to the latch support cap.
    상기 캠판에 마찰력이 제공되어 상기 래치가 회전하면, 상기 캠부를 따라 상기 가이드돌기의 위치가 변경되어 상기 래치가 상기 래치 간섭구를 벗어나도록 자세변경된 상태를 유지하여 상기 스프라켓 지지유닛이 상기 타방향으로 자유회전 가능한 것을 특징으로 하는 자전거의 변속장치.When the latch is rotated by providing the friction force to the cam plate, the position of the guide protrusion along the cam portion is changed to maintain the posture changed so that the latch leaves the latch interference hole so that the sprocket support unit moves in the other direction. Bicycle shifting device characterized in that free rotation.
  4. 제3항에 있어서, 상기 래치 제어유닛은,The method of claim 3, wherein the latch control unit,
    상기 캠판이 상기 래치 지지캡에 대해 상대적으로 회전되는 범위를 제한하도록 상기 캠판과 상기 래치 지지캡 사이에 설치되는 회전각 제한부;를 더 포함하는 것을 특징으로 하는 자전거의 변속장치.And a rotation angle limiter disposed between the cam plate and the latch support cap to limit a range in which the cam plate is rotated relative to the latch support cap.
  5. 제3항에 있어서, 상기 래치 제어유닛은,The method of claim 3, wherein the latch control unit,
    상기 캠판이 상기 래치 지지캡에서 분리되는 것을 방지하기 위한 고정부재를 더 포함하는 것을 특징으로 하는 자전거의 변속장치.And a fixing member for preventing the cam plate from being separated from the latch support cap.
  6. 제1항 내지 제5항 중 어느 한 항에 있어서, 상기 래치 간섭부는,According to any one of claims 1 to 5, The latch interference portion,
    상기 스프라켓 지지유닛의 내주에 일체로 형성된 것을 특징으로 하는 자전거의 변속장치.Bicycle shifting device characterized in that formed integrally with the inner circumference of the sprocket support unit.
  7. 제1항 내지 제5항 중 어느 한 항에 있어서, 상기 스프라켓 지지유닛은,The sprocket support unit according to any one of claims 1 to 5,
    상기 허브축 유닛의 외측에 지지베어링에 의해 회전 가능하게 지지되며, 외주에 다수의 스프라켓이 끼워져 결합되는 스프라켓 지지하우징; 및A sprocket support housing rotatably supported by a support bearing on an outer side of the hub shaft unit, wherein a plurality of sprockets are fitted and coupled to an outer circumference thereof; And
    상기 스프라켓 지지하우징의 단부에 체결되어, 상기 스프라켓 지지하우징에 결합된 스프라켓의 이탈을 방지하는 이탈방지캡;을 포함하며,And a release preventing cap which is fastened to an end of the sprocket support housing and prevents the sprocket from being separated from the sprocket coupled to the sprocket support housing.
    상기 래치 간섭부는 상기 이탈방지캡에 설치되는 것을 특징으로 하는 자전거의 변속장치.And the latch interference part is installed on the release preventing cap.
PCT/KR2013/005566 2012-06-25 2013-06-24 Transmission for bicycle WO2014003395A1 (en)

Applications Claiming Priority (2)

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KR10-2012-0067892 2012-06-25
KR1020120067892A KR101193597B1 (en) 2012-06-25 2012-06-25 Bicycle transmission

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI809490B (en) * 2021-09-01 2023-07-21 彥豪金屬工業股份有限公司 Bicycle shift operating device

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3065655B2 (en) * 1990-11-13 2000-07-17 株式会社シマノ Speed change device for bicycle
KR20010110061A (en) * 2000-05-30 2001-12-12 마재열 Apparatus for controlling a speed changing apparatus for bicycles
KR20050053473A (en) * 2004-04-02 2005-06-08 오천도 A transmission for bicycle
JP2005324603A (en) * 2004-05-12 2005-11-24 Fujiwara Wheel:Kk Transmission for bicycle

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3065655B2 (en) * 1990-11-13 2000-07-17 株式会社シマノ Speed change device for bicycle
KR20010110061A (en) * 2000-05-30 2001-12-12 마재열 Apparatus for controlling a speed changing apparatus for bicycles
KR20050053473A (en) * 2004-04-02 2005-06-08 오천도 A transmission for bicycle
JP2005324603A (en) * 2004-05-12 2005-11-24 Fujiwara Wheel:Kk Transmission for bicycle

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI809490B (en) * 2021-09-01 2023-07-21 彥豪金屬工業股份有限公司 Bicycle shift operating device

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