KR200350199Y1 - cycle variable sprocket - Google Patents

cycle variable sprocket Download PDF

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Publication number
KR200350199Y1
KR200350199Y1 KR20030028993U KR20030028993U KR200350199Y1 KR 200350199 Y1 KR200350199 Y1 KR 200350199Y1 KR 20030028993 U KR20030028993 U KR 20030028993U KR 20030028993 U KR20030028993 U KR 20030028993U KR 200350199 Y1 KR200350199 Y1 KR 200350199Y1
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KR
South Korea
Prior art keywords
sprocket
shaft
force
bicycle
pedal
Prior art date
Application number
KR20030028993U
Other languages
Korean (ko)
Inventor
서주봉
Original Assignee
서주봉
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 서주봉 filed Critical 서주봉
Priority to KR20030028993U priority Critical patent/KR200350199Y1/en
Application granted granted Critical
Publication of KR200350199Y1 publication Critical patent/KR200350199Y1/en
Priority to PCT/KR2004/002293 priority patent/WO2005023630A1/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
    • 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
    • B62M9/08—Transmissions characterised by use of an endless chain, belt, or the like of changeable ratio using a single chain, belt, or the like involving eccentrically- mounted or elliptically-shaped driving or driven wheel; with expansible driving or driven wheel
    • 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
    • B62M3/00—Construction of cranks operated by hand or foot
    • B62M3/06—Construction of cranks operated by hand or foot with elliptical or other non-circular rotary movement
    • 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
    • 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
    • B62M2009/002—Non-circular chain rings or sprockets

Abstract

A variable drive sprocket for a bicycle designed to allow the force applied to pedals 18 to be changed in order to rotate a driving shaft 14 one revolution when driving the bicycle. That is, in the case where the driving shaft 14 of the bicycle is rotated one revolution, the force can be applied to a pedal shaft 16 only when the pedals 18 are pushed twice in a direction of 180°. Accordingly, the variable drive sprocket has different radii in a section where a force can be easily applied to the pedal shaft 16 and in a section where the force can hardly applied to the pedal shaft 16, thereby allowing easy driving of the bicycle.

Description

자전거의 가변 구동용 스프라켓{cycle variable sprocket}Cycle variable sprocket

본 고안은 자전거의 가변 구동용 스프라켓에 관한 것으로, 특히 자전거 구동축의 중심으로 부터 체인 The present invention relates to a sprocket for variable drive of a bicycle, in particular the chain from the center of the bicycle drive shaft

스프라켓의 피치원 지름을 가변형으로 구성하여 자전거를 운행시 가하는 힘의 조건을 변화 하여 보다By varying the pitch circle diameter of the sprocket,

용이하게 운행하기 위한 것이다.It is for easy operation.

즉, 자전거 운행시 사람이 페달에 힘을 가장 많이 가할수 있는 조건인 페달 축이 지면과 평행의 조건에In other words, the pedal shaft, which is the condition that a person can apply the most force to the pedal when driving,

서 스프라켓의 피치원 지름을 가장크게 하고, 사람의 발과 페달 축이 지면과 수직으로 형성될 경우에는If the diameter of the sprocket is the largest and the human foot and pedal shaft are formed perpendicular to the ground,

보다 적은 힘으로도 구동 스프라켓을 돌릴 수 있도록 자전거의 가변 구동용 스프라켓을 제공 하는데It provides a variable drive sprocket for the bike so that the drive sprocket can be turned with less power.

있다.have.

그러나, 종래에는 진원 형태의 구동 스프라켓으로 구성 되어 사람이 힘을 가장 많이 가할 수 있는 조건However, in the related art, it is composed of a drive sprocket having a round shape, and a condition in which a person can apply the most force.

과, 역으로 가장 힘을 가할 수 없는 조건의 구별이 없이 항상 일정한 피치원 지름으로 구성되어 있어Consistently of constant pitch circle diameter

고정축에 회전 동력을 전달하는 힘의 변화를 구성 할 수가 없었다.It was not possible to construct a change in force that transmits rotational power to the fixed shaft.

도 5에는 가변 구동용 스프라켓(11)의 중심점(22)의 대각 방향으로 즉, 1사분면과 3사분면FIG. 5 shows the first and third quadrants in the diagonal direction of the center point 22 of the variable sprocket 11.

그리고 2사분면과 4사분면으로 서로 합동인 4개의 원호(21)로 구성되며 그 원호(21)의 전체And consists of four circular arcs 21 conjoined with each other in two and four quadrants.

둘레가 종래의 원형 체인 스프라켓의 피치원 지름의 총 둘레와 동일한 길이로 구성되며 가변The circumference is of the same length as the total circumference of the pitch circle diameter of the conventional circular chain sprocket, and is variable

구동용 스프라켓(11)이 회전 운동을 할때 항상 상하 축으로나 좌우 축, 양쪽의 원주 거리가When the drive sprocket 11 is rotating, the circumferential distance between the upper and lower axes, the left and right axes, and both sides is always

동일하여 구동축과 종동축 간의 거리 즉, 구동 체인의 길이는 항상 일정 하게 유지 된다.In the same way, the distance between the drive shaft and the driven shaft, ie the length of the drive chain, is always kept constant.

단, 피치원 지름이 진원이 되는 경우는 제외 한다.However, the case where the pitch circle diameter becomes a circle is excluded.

따라서, 본 고안은 가변 구동용 스프라켓의 구성 조건으로 피치원 형상이 2가지 또는 3가지Therefore, the present invention has two or three pitch circle shapes as the constituent conditions of the variable drive sprocket.

이상의 원호의 조합으로 구성 되며 타원의 형태도 가능 하다.Consists of a combination of the above arc and elliptical shape is also possible.

도 1과 도 2는 가변 구동용 스프라켓의 설치도1 and 2 is an installation view of the sprocket for variable drive

도 3은 구동축과 페달축의 분해사시도3 is an exploded perspective view of the drive shaft and the pedal shaft;

도 4는 구동축과 페달축의 각도 변경도4 is an angle change view of the drive shaft and the pedal shaft;

도 5는 가변 구동용 스프라켓의 상세도 (1회전당 토오크 증감표 포함)5 is a detailed view of the sprocket for variable drive (including torque increase and decrease table per revolution)

도 6은 기존 진원형 스프라켓 (참고도)6 is a conventional round sprocket (reference)

도 7원 타원형 구동 스프라켓Fig. 7 Circle Elliptical Drive Sprocket

*도면의 주요 부분에 대한 부호의 설명** Description of the symbols for the main parts of the drawings *

11 : 가변 구동용 스프라켓 12 : 종동 스프라켓11: sprocket for variable drive 12: driven sprocket

13 : 체인 14 : 구동축13: chain 14: drive shaft

15 : 스플라인 축 16 : 페달 축15: spline shaft 16: pedal shaft

17 : 스플라인 홀 18 : 페달17: spline hole 18: pedal

19 : 볼트 20 : 너트19: Bolt 20: Nut

21 : 원호(X-Y 축간 거리) 22 : 중심점21: arc (X-Y axis distance) 22: center point

본 고안은 스프라켓의 1회전당 2번의 고속 저부하(저 토오크) 구간과 2번의 저속 고부하(고The present invention provides two high speed low load (low torque) sections and two low speed high loads per high revolution of the sprocket.

토오크) 구간을 구성 함으로써 즉, 도 1에서 사람이 자전거의 페달(18)을 밟고서 페달 축(16)Torque) section, that is, a person steps on the pedal 18 of the bicycle in FIG.

에 힘을 가하여 구동 축(14)를 1회전 구동 할 경우 페달 축(16)이 지면과 수직으로 2번 위치When the drive shaft 14 is driven once by applying force to the pedal shaft, the pedal shaft 16 is positioned 2 times perpendicular to the ground.

하고 지면과 수평으로 2번 위치하게 된다. 따라서 힘을 가하기 유리한 페달축(16)의 수평 조It is positioned 2 times horizontally with the ground. Thus, the horizontal adjustment of the pedal shaft 16, which is advantageous for applying force

건에 가변형 구동 스프라켓(11)의 저속 고부하 구간으로 설정하고 역으로 힘을 가하기 불리한It is unfavorable to set the gun as a low speed, high load section of the variable drive sprocket (11) and apply a force in reverse.

페달 축(16)의 수직 조건에서는 가변 구동용 스프라켓(11)의 고속 저부하 구간으로 설정한다.In the vertical condition of the pedal shaft 16, it is set to the high speed low load section of the variable drive sprocket 11.

도 3에서 구동 축(14)의 양쪽 끝 단부에 스플라인 축(15)를 구성하고 페달 축(16)에 스플라인3 constitutes a spline shaft 15 at both ends of the drive shaft 14 and a spline on the pedal shaft 16.

축(14)과 결합 할 수있는 스플라인 홀(17)를 구성 하여 볼트(19)와 너트(20)으로 체결 하여 사The spline hole 17 that can be combined with the shaft 14 is formed to be fastened with the bolt 19 and the nut 20.

람의 신체 조건에 따라 가변 구동용 스프라켓(11)과 페달 축(16)의 체결 각도 조절도 가능 하다.It is also possible to adjust the fastening angle of the variable drive sprocket 11 and the pedal shaft 16 according to the physical condition of the ram.

도 4에서는 사람의 신체 조건에 따라 가변 구동용 스프라켓(11)과 페달 축(16)의 체결 각도의4 shows the fastening angle of the variable drive sprocket 11 and the pedal shaft 16 according to the physical condition of the person.

조절 상태를 도시화 한 것이다.The state of control is illustrated.

도 5에는 가변 구동용 스프라켓의 1회전당 회전 토오크 분포를 도시한 것으로 출력되는 구동 축FIG. 5 shows the rotation torque distribution per revolution of the variable drive sprocket.

이 1회전 할동안 2번의 고속 구간과 2번의 저속 구간이 발생된다.During this one round, two high speed sections and two low speed sections occur.

이때, 사람이 자전거를 구동 할 경우 페달에 가해지는 힘이 한쪽 발이 1번씩 페달을 밀어 낼At this time, if a person drives a bicycle, the force exerted on the pedal will push out the pedal once.

경우에만 작용 하므로 구동 축의 180도 방향으로 2번만 힘을 가할 수 있다.Only in this case, the force can only be applied twice in the 180 ° direction of the drive shaft.

따라서, 본 고안은 사람의 힘이 작용 하기 힘든 구간에는 보다 적은 회전력으로도 자전거를 운Therefore, the present invention operates a bicycle with less rotational force in the section where human force is hard to work.

행 할 수 있도록 하는데 우수한 효과가 있다.It has an excellent effect in making it possible.

Claims (5)

자전거의 구동 스프라켓이 있어서,The driving sprocket on the bike, 상기 스프라켓(11)의 피치원 지름이 타원으로 구성되며, 상기 스프라켓에The pitch circle diameter of the sprocket 11 is composed of an ellipse, the sprocket 고정된 구동축(14)의 양쪽 끝단부에 스플라인 축(15)를 구성 하고,The spline shaft 15 is formed at both ends of the fixed drive shaft 14, 페달 축(16)에 스플라인 축(15)과 결합 가능한 스플라인 홀(17)를 구성하며,The pedal shaft (16) constitutes a spline hole (17) engageable with the spline shaft (15), 볼트(19)와 너트(20)의 체결로 고정되고,It is fixed by the fastening of the bolt 19 and the nut 20, 체결시 각도 조정이 가능한 구조로 이루어 지는것을It is made of a structure that can adjust the angle when tightening 특징으로 하는 자전거의 가변 구동용 스프라켓.The sprocket for variable drive of the bicycle characterized by the above-mentioned. 삭제delete 삭제delete 삭제delete 삭제delete
KR20030028993U 2003-09-09 2003-09-09 cycle variable sprocket KR200350199Y1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
KR20030028993U KR200350199Y1 (en) 2003-09-09 2003-09-09 cycle variable sprocket
PCT/KR2004/002293 WO2005023630A1 (en) 2003-09-09 2004-09-09 Variable drive sprocket of bicycle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR20030028993U KR200350199Y1 (en) 2003-09-09 2003-09-09 cycle variable sprocket

Publications (1)

Publication Number Publication Date
KR200350199Y1 true KR200350199Y1 (en) 2004-05-14

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Family Applications (1)

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KR20030028993U KR200350199Y1 (en) 2003-09-09 2003-09-09 cycle variable sprocket

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WO (1) WO2005023630A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014073933A1 (en) * 2012-11-09 2014-05-15 Choi Yun Seok Asymmetric elliptical chainring capable of fine-angle variation, and crankset of bicycle comprising same
JP2018020739A (en) * 2016-08-05 2018-02-08 株式会社スギノエンジニアリング Gear plate for bicycle
WO2018066913A1 (en) * 2016-10-06 2018-04-12 최윤석 Asymmetric elliptical chainring for clipless pedal
KR20180038377A (en) * 2016-10-06 2018-04-16 최윤석 Asymmetric ellipse chain ring for clipless pedal

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL2011337C2 (en) * 2013-08-26 2015-03-02 Non Stop Webshops B V CHAIN WHEEL AND CRANKE COMPOSITION WITH SUCH CHAIN WHEEL.

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4425824A (en) * 1981-07-10 1984-01-17 Koch Curtis J Variable torque bicycle sprocket
CA2080791A1 (en) * 1991-11-22 1993-05-23 David J. Runnels Bicycle with rhomboidal gear
US5759124A (en) * 1995-10-18 1998-06-02 National Science Council Multistage sprocket used in a bicycle rear derailleur system
JPH11348866A (en) * 1998-06-12 1999-12-21 Sony Corp Bicycle

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014073933A1 (en) * 2012-11-09 2014-05-15 Choi Yun Seok Asymmetric elliptical chainring capable of fine-angle variation, and crankset of bicycle comprising same
JP2018020739A (en) * 2016-08-05 2018-02-08 株式会社スギノエンジニアリング Gear plate for bicycle
WO2018066913A1 (en) * 2016-10-06 2018-04-12 최윤석 Asymmetric elliptical chainring for clipless pedal
KR20180038377A (en) * 2016-10-06 2018-04-16 최윤석 Asymmetric ellipse chain ring for clipless pedal
CN109803881A (en) * 2016-10-06 2019-05-24 崔闰晳 The oval chain link of asymmetry for no clip pedal
KR102041551B1 (en) 2016-10-06 2019-11-27 최윤석 Asymmetric ellipse chain ring for clipless pedal

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