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WO1998006622A1 - Appareil d'entrainement vers l'avant d'une bicyclette - Google Patents

Appareil d'entrainement vers l'avant d'une bicyclette Download PDF

Info

Publication number
WO1998006622A1
WO1998006622A1 PCT/KR1997/000047 KR9700047W WO9806622A1 WO 1998006622 A1 WO1998006622 A1 WO 1998006622A1 KR 9700047 W KR9700047 W KR 9700047W WO 9806622 A1 WO9806622 A1 WO 9806622A1
Authority
WO
WIPO (PCT)
Prior art keywords
sprocket wheel
inner sprocket
rotation
support bracket
ratchet
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/KR1997/000047
Other languages
English (en)
Inventor
Chun Kill Park
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LEE JUN HYUNG
Original Assignee
LEE JUN HYUNG
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 LEE JUN HYUNG filed Critical LEE JUN HYUNG
Priority to AU21799/97A priority Critical patent/AU2179997A/en
Publication of WO1998006622A1 publication Critical patent/WO1998006622A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • B62M1/00—Rider propulsion of wheeled vehicles
    • B62M1/36—Rider propulsion of wheeled vehicles with rotary cranks, e.g. with pedal cranks
    • 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
    • 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
    • B62M11/06—Transmissions characterised by the use of interengaging toothed wheels or frictionally-engaging wheels of changeable ratio with spur gear wheels

Definitions

  • the present invention relates to a bicycle forward driving apparatus by which a bicycle is driven forward even when its pedal is driven reversely.
  • a bicycle's driving apparatus is formed with a driving sprocket wheel installed on the side of the pedal, a driven sprocket wheel installed on the side of the rear wheel, and a chain which connects them.
  • a one-direction clutch for rotating the rear wheel only forward is installed on the driven sprocket wheel of the rear wheel .
  • Such a bicycle forward driving apparatus is designed to be driven forward only by the pedal's forward rotation so that the pedal's rolling operation is simple and legs become exhausted during long-time running because the pedal is rotated continuously only in one direction.
  • Publication No. 95-13589 includes a body frame to which a fixing bracket with a pulley is fastened, a traveling portion for transmitting the driving force of the pedal axle rotatably fastened to the center of the body frame to the driving sprocket, an invertedly driving portion attachably/detachably fastened to the traveling portion and for inverting the reverse rotation or racing of the pedal axle into the forward rotation which is then transmitted to the driving sprocket, and a switching lever portion for attaching or detaching the invertedly driving portion to or from the traveling portion according to the rider's intention.
  • the invertedly driving portion is coupled to the traveling portion, which is converted and rotated forward during the pedal's reverse rotation by the invertedly driving portion. Through this process, the bicycle can run forward even during the pedal's reverse rotation.
  • the apparatus is made so that during the transmission of the rotation force to the traveling portion via the invertedly driving portion, the rotation ratio is reduced not to maintain the same traveling speed as in the pedal's forward rotation.
  • the invertedly driving portion and switching lever portion are very complicated and have so many components, increasing the number of assembly process, which decreases the productivity and raises the production cost .
  • the present invention is directed to a bicycle forward driving apparatus that substantially obviates one or more of the problems due to limitations and disadvantages of the related art.
  • An object of the present invention is to provide a bicycle forward driving apparatus by which the bicycle can be driven forward only with the pedal's forward or reverse rotation, without an additional manipulation of a lever.
  • Another object of the present invention is to provide a bicycle forward driving apparatus which is formed in one set and fastened to the hub axle or detached from it so that the apparatus assembly and disassembly are performed to facilitate its repairing, and that the process of assembly and component management are carried out efficiently in the manufacturing of bicycles.
  • Still another object of the present invention is to provide a bicycle forward driving apparatus which maintains the same traveling speed so that even the pedal's reverse rotation involves the rotation ratio of 1:1 which is the same as that of the forward rotation.
  • a bicycle forward driving apparatus comprising: a driven sprocket wheel which rotates by receiving a pedal's driving force; an inner sprocket wheel separably coupled to a rear wheel's hub axle; first one-direction rotation means installed between the driven sprocket wheel and inner sprocket wheel so that its rotation force is transmitted to the inner sprocket wheel only during the driven sprocket wheel's forward rotation; a plurality of intermediate gears engaged between the driven sprocket wheel and inner sprocket wheel for transmitting rotation force; a support bracket for rotatably fixing the plurality of intermediate gears; a fixed cylinder inserted into the rear wheel's fixed axle; second one- direction rotation means installed between the fixed cylinder and support bracket so that only the support bracket rotates forward.
  • the bicycle forward driving apparatus further comprises locking release means for driving the second one-direction rotation means so that the support bracket is
  • the second one-direction rotation means comprises a ratchet wheel formed in the support bracket, and a ratchet elastically installed on the fixed cylinder to appear and disappear.
  • the locking release means comprises a rotatable body installed to be engaged with the ratchet and having a circular projections formed on one side and protruded toward the inner sprocket wheel; and a plurality of cams formed on the inner sprocket wheel and guiding the circular projections so that the rotatable body is rotated at a predetermined angle according to the forward/backward rotation of the inner sprocket wheel.
  • the inner sprocket wheel is detachable from the hub axle with a screw, and the fixed cylinder is inserted into the fixed axle and fastened with a nut.
  • FIG. 1 is a sectional view of a bicycle forward driving apparatus of the present invention
  • FIG. 2 is an enlarged sectional view taken along line C-C of FIG. 1
  • FIG. 3 is an exploded perspective view of the ratchet and rotatable body of the bicycle forward driving apparatus of the present invention
  • FIGS. 4A and 4B are partially enlarged sectional views taken along line D-D of FIG. 1, showing the locking release operation of the ratchet;
  • FIG. 5 is an elevation view which shows the cam shape of the inner sprocket wheel in the bicycle forward driving apparatus of the present invention
  • FIGS. 6A-6D illustrate the operations between the ratchet and sprocket wheel of the present invention
  • FIGS. 7A and 7B show another embodiment of the ratchet release means of the present invention, showing the locking release operation of the ratchet
  • FIG. 8 shows the operation of the rotatable plate in the ratchet release means of the present invention.
  • a first one-direction rotating portion is installed between a driven sprocket wheel 21 connected with a pedal and chain (not shown) to be engaged therewith, and inner sprocket wheel 24 detachably screw-fastened to hub axle 23 of rear wheel 22.
  • the first one-direction rotating portion comprises ratchet wheel 25 formed in driven sprocket wheel 21, and ratchet 27 installed in inner sprocket wheel 24 elastically with spring 26 to appear and disappear. It is constructed so that the rotation force is transmitted to inner sprocket wheel 24 only when driven sprocket wheel 21 rotates forward.
  • driven sprocket wheel 21 and inner sprocket wheel 24 there is a plurality of intermediate gears 28 fixed rotatably to support bracket 29. These gears reverse the rotation direction of driven sprocket wheel 21, and transmit it to inner sprocket wheel 24.
  • the rotation ratio of sprocket wheel 21 and inner sprocket wheel 24 is preferably 1:1.
  • a second one-direction rotating portion is installed between fixed cylinder 32 and support bracket 29.
  • the second one-direction rotating portion comprises ratchet wheel 33 formed in support bracket 29, and ratchet 35 installed elastically with spring 34 to appear and disappear. This second one- direction rotating portion is made only to rotate support bracket 29 forward.
  • a locking release means for driving the second one- direction rotating portion is provided so that support bracket 29 is selectively rotated reversely.
  • the locking release means as shown in FIGS. 3, 4 and 5, has a rotatable body 36 installed in ratchet 35 and including a circular projection 36a protruded toward inner sprocket wheel 24, and a plurality of cams 37 for guiding circular projection 36a so that rotatable body 36 rotates at a predetermined angle when inner sprocket wheel 24 rotates forward or reversely.
  • Cams 37 are protruded from inner sprocket wheel 24, and disposed along its circumference. They maintain an interval through which circular projection 36a of rotatable body 36 passes.
  • the confronted faces of one cam 30 and its adjacent cam form a slanted passage 37a so that circular projection 36a is led above or under cam 37 according to the rotation direction of inner sprocket wheel 24.
  • circular projection 36a is guided to be located under cam 37 through slanted passage 37a between cams 37.
  • inner sprocket wheel 24 rotates reversely, circular projection 36a is located above cam 37 through slanted passage 37a.
  • FIGS. 7A, 7B and 8 another embodiment of the locking release means is made so that rotatable plate 40 is installed to be rotated centering on pin 41, adjacent to ratchet 35.
  • the lower end of spring 34 of ratchet 35 is interrupted by one end of rotatable plate 40.
  • Rotatable plate 40 rotates left and right at a predetermined angle according to the rotation direction of inner sprocket wheel 24.
  • a plurality of protrusions 42 are disposed on the side of inner sprocket wheel 24 at predetermined intervals along its circumference. Part of the end of rotatable plate 40 is inserted between protrusions 42.
  • a bicycle runs forward when its pedal rotates either forward or reversely. If the pedal rotates forward and thus driven sprocket wheel 21 rotates forward (in the direction of arrow "a” of FIG. 5) as in FIGS. 1, 2, and 4A, the rotation force is transmitted to inner sprocket wheel 24 by ratchet wheel 25 and ratchet 27 so that, the sprocket wheel and hub axle 23 of the rear wheel are rotated to enable the bicycle to run forward.
  • intermediate gears 28 rotate in the same direction as support bracket 29 because the rotation directions of driven sprocket wheel 21 and inner sprocket wheel 24 are the same.
  • the gears are rotatable by ratchet wheel 33 and ratchet 35 if inner sprocket wheel 24 rotates forward (in the direction of arrow "c") as in FIG. 4A.
  • driven sprocket wheel 21 and inner sprocket wheel 24 are rotated in the opposite directions, and support bracket 29 cannot be rotated in the direction of arrow "d" by ratchet wheel 33 and ratchet 35 so that intermediate gears 28 transmit only the rotation force at its original position.
  • the bicycle forward driving apparatus of the present invention enables the bicycle to move forward or backward by rotating the front and rear wheels with the pedal not stepped on.
  • rear wheel 22 is rotated forward to allow the bicycle to run forward, the rotation force is not transmitted to driven sprocket wheel 21 by ratchet wheel 25 and ratchet 27 because inner sprocket wheel 24 fixed to hub axle 23 rotates forward (in the direction of arrow "a") as in FIGS. 1 and 2.
  • support bracket 29 rotates forward in the direction of arrow "c" as in FIG. 4A because intermediate gears 28 receive the rotation force of inner sprocket wheel 24 and race with driven sprocket wheel 21 which stops.
  • support bracket 29 is rotatable by ratchet wheel 33 and ratchet 35 so that the bicycle runs forward.
  • Circular projection 36a of rotatable body 36 engaged with ratchet 35 is located under cam 37 as in FIG. 9A, and, when cam 37 of inner sprocket wheel 24 rotates forward in the direction of arrow "a", the projection is led under cam 37, as shown with the virtual line, not toward passage 37a, because of its curved surface. For this reason, rotatable body 36 is not engaged with ratchet 35.
  • hub axle 23 of rear wheel 22 and inner sprocket wheel 24 are rotated reversely (in the direction of arrow "b") as shown in FIGS.
  • the rotation force is transmitted to driven sprocket wheel 21 by ratchet wheel 25 and ratchet 27 so that driven sprocket wheel 21 is rotated reversely. Because driven sprocket wheel 21 and inner sprocket wheel 24 are rotated in the same direction, intermediate gears 28 and support bracket 29 are rotated reversely therealong.
  • the bicycle forward driving apparatus of the present invention is constructed so that its assembly and disassembly are facilitated.
  • inner sprocket wheel 24, driven sprocket wheel 21, intermediate gears 28, support bracket 29, and fixed cylinder 31 are formed in one set so that their assembly can be easily performed when inner sprocket wheel 24 is screw-fastened to hub axle 23 and at the same time fixed cylinder 31 is inserted into fixed axle 30 and then fastened by nut 32.
  • the disassembly is easily performed by separating nut 32 and then inner sprocket wheel 24 from hub axle 23. This facilitates its repairing.
  • the bicycle forward driving apparatus of the present invention enables a bicycle's forward driving even during the pedal's reverse rotation, as well as free forward/backward shifting of the bicycle.
  • the apparatus' assembly and disassembly are performed simply to facilitate its repairing.
  • the process of assembly and component management are carried out efficiently in the manufacturing of bicycles.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Transmission Devices (AREA)
  • Transmissions By Endless Flexible Members (AREA)

Abstract

L'invention porte sur un appareil d'entraînement vers l'avant d'une bicyclette, cet appareil comprenant un pignon à chaîne qui tourne lors de la réception de la force d'entraînement d'une pédale; un pignon interne couplé de façon séparable à l'axe du moyeu de la roue arrière; un premier dispositif à rotation unidirectionnelle placé entre le pignon à chaîne entraîné et le pignon interne de sorte que sa force de rotation soit transmise au pignon interne uniquement lors de la rotation vers l'avant du pignon entraîné; une pluralité de roues dentées intermédiaires engagées entre le pignon entraîné et le pignon interne de façon à transmettre une force de rotation; une patte de support destinée à fixer rotative la pluralité de roues dentées; un cylindre fixe inséré dans l'axe fixe de la roue arrière; et un second dispositif de rotation unidirectionnel placé entre le cylindre fixe et la patte de support de sorte que, seule, cette dernière tourne vers l'avant. En conséquence, l'appareil permet l'entraînement vers l'avant d'une bicyclette même lors de la rotation contraire de la pédale, ainsi que le déplacement libre de la bicyclette vers l'avant/vers l'arrière.
PCT/KR1997/000047 1996-08-08 1997-03-25 Appareil d'entrainement vers l'avant d'une bicyclette Ceased WO1998006622A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU21799/97A AU2179997A (en) 1996-08-08 1997-03-25 Bicycle forward driving apparatus

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR2019960023983U KR200144371Y1 (ko) 1996-08-08 1996-08-08 자전거 전진 구동장치
KR1996/23983 1996-08-08

Publications (1)

Publication Number Publication Date
WO1998006622A1 true WO1998006622A1 (fr) 1998-02-19

Family

ID=53972283

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR1997/000047 Ceased WO1998006622A1 (fr) 1996-08-08 1997-03-25 Appareil d'entrainement vers l'avant d'une bicyclette

Country Status (4)

Country Link
KR (1) KR200144371Y1 (fr)
CN (1) CN1173446A (fr)
AU (1) AU2179997A (fr)
WO (1) WO1998006622A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003064889A1 (fr) * 2002-01-30 2003-08-07 Gwang-Seub Lee Engrenage unidirectionnel

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20000014689A (ko) * 1998-08-24 2000-03-15 김영환 액정 표시 소자
KR20090128031A (ko) * 2008-06-10 2009-12-15 최의정 자전거
KR101519346B1 (ko) * 2010-08-05 2015-05-21 최인섭 자전거
EP4309990A4 (fr) * 2021-03-20 2025-03-19 Eun Su Han Transmission multivitesses

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1334664A (fr) * 1961-09-14 1963-08-09 Restello Ab Dispositif de transmission
EP0369925A2 (fr) * 1988-11-17 1990-05-23 Vasilios Mantzoutsos Transmission pour bicyclette

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1334664A (fr) * 1961-09-14 1963-08-09 Restello Ab Dispositif de transmission
EP0369925A2 (fr) * 1988-11-17 1990-05-23 Vasilios Mantzoutsos Transmission pour bicyclette

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003064889A1 (fr) * 2002-01-30 2003-08-07 Gwang-Seub Lee Engrenage unidirectionnel

Also Published As

Publication number Publication date
CN1173446A (zh) 1998-02-18
KR200144371Y1 (ko) 1999-06-15
AU2179997A (en) 1998-03-06
KR19980010550U (ko) 1998-05-15

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