WO1993018960A1 - Gear shifter for bicycle - Google Patents
Gear shifter for bicycle Download PDFInfo
- Publication number
- WO1993018960A1 WO1993018960A1 PCT/JP1993/000335 JP9300335W WO9318960A1 WO 1993018960 A1 WO1993018960 A1 WO 1993018960A1 JP 9300335 W JP9300335 W JP 9300335W WO 9318960 A1 WO9318960 A1 WO 9318960A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- reel
- cable
- cable winding
- bicycle
- speed change
- Prior art date
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
- B62M25/00—Actuators for gearing speed-change mechanisms specially adapted for cycles
- B62M25/02—Actuators for gearing speed-change mechanisms specially adapted for cycles with mechanical transmitting systems, e.g. cables, levers
- B62M25/04—Actuators for gearing speed-change mechanisms specially adapted for cycles with mechanical transmitting systems, e.g. cables, levers hand actuated
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62K—CYCLES; CYCLE FRAMES; CYCLE STEERING DEVICES; RIDER-OPERATED TERMINAL CONTROLS SPECIALLY ADAPTED FOR CYCLES; CYCLE AXLE SUSPENSIONS; CYCLE SIDE-CARS, FORECARS, OR THE LIKE
- B62K23/00—Rider-operated controls specially adapted for cycles, i.e. means for initiating control operations, e.g. levers, grips
- B62K23/02—Rider-operated controls specially adapted for cycles, i.e. means for initiating control operations, e.g. levers, grips hand actuated
- B62K23/04—Twist grips
Definitions
- the present invention relates to a bicycle shift operation device. More particularly, the present invention relates to a bicycle shift operation device capable of reducing a turning operation force of a shift operating body necessary for a shift operation and setting an amount of turning operation of the shift operating body to an optimum value.
- a gearshift operating device for a sports type bicycle such as a racing bicycle is often mounted on a body frame such as a down tube or a top tube. Therefore, in order to perform a gearshift operation, the driver must release his / her hand from the steering wheel, so it is of course impossible to apply braking immediately, and one-handed driving must be performed. As a result, steering operation became unstable and safety was not high. ' 3 ⁇ 4
- the shifting operation is required mainly when the road surface condition changes, such as when there is a scene that changes from a flat ground to a sloping road. In such a running scene, the running state becomes unstable and often requires a brake operation.
- a tubular gearshift operating body is fitted around the outer periphery of the left and right handlebars.
- a so-called handle-grip rotary speed change device in which a speed change operation cable can be pulled or pulled out by rotating a cylindrical operation body.
- the speed change operation can be performed without releasing the hand from the grip portion of the handlebar. As a result, driving safety is greatly improved.
- a reel portion for winding the speed change operation cable is provided on the outer peripheral portion of the tubular operation body.
- the cable winding of the reel unit is performed.
- the take radius must also be set to be greater than the handlebar radius.
- the cable winding radius force is increased, the amount of pulling of the speed change operation cable corresponding to the turning operation of the cylindrical operation body is also increased. Therefore, when a derailleur with a large number of gears is used, the turning operation angle of the tubular operation tool for changing over to an adjacent sprocket is reduced.
- an object of the present invention is to reduce the turning operation force of the speed change operation body necessary for the speed change operation, and to set the rotation operation amount of the speed change operation body to an optimum value to perform the speed change operation.
- a bicycle shift operation device having improved operability.
- the present invention provides a bicycle shifting operation comprising: a shifting operation body rotatably supported by a suitable portion of a bicycle frame; and a cable winding reel for pulling or unwinding a shifting operation cable connected to the transmission.
- the cable take-up reel includes a first reel portion for turning the speed change operation cable, and a second reel portion for turning a drive cable, and turning the speed change operation body.
- the first reel unit is configured to be rotated by the drive cable that is pulled or rubbed out by operating the cable, and the cable winding radius of the first reel unit and the second reel unit.
- the cable winding radius is configured to be different.
- FIG. 1 is a diagram showing an overall configuration of a speed change mechanism employing a speed change operation device according to the present invention.
- FIG. 2 is a plan view of the speed change operation device according to the present invention.
- FIG. 3 is a sectional view taken along the axis of the speed change operation device of FIG.
- FIG. 4 is a sectional view taken along the line IV-IV in FIG.
- FIG. 5 is a partial cross-sectional view showing a main part of the speed change operation device according to the present invention.
- FIG. 6 is a diagram for explaining the operation of the present invention.
- FIG. 7 is a sectional view taken along the line VII-VII in FIG.
- FIG. 8 is an operation explanatory diagram for explaining the click mechanism.
- FIG. 9 is a view showing another embodiment of the cable take-up reel according to the present invention.
- the present invention is applied to the left and right brake lever devices 2a, 2b to the right and left grip portions 4a, 4b 'of the handlebar 13.
- the speed change devices 6a and 6b according to the invention are provided respectively. Note that the following description is made with respect to the example of the right shift operation device 6b that operates the rear transmission 1b. However, the same configuration is adopted for the left shift operation device 6a that operates the front transmission 1a.
- the brake lever device 2b includes a brake bracket 8 provided so as to protrude forward from the front surface of the handlebar 3 toward the vehicle body;
- a base lever is rotatably connected to a lever single shaft provided on the shaft, and a brake lever is provided extending forward of the grip portion.
- a brake cable composed of an inner cable wl and an auta cable w2 inserted therein. W is an aerial cable w2.
- the inner cable wl is introduced into the internal space of the brake bracket 8 and the nipple 13 a provided at its end is attached to the base end of the brake lever 13. It is fixed.
- a cylindrical resin material rotatably supporting a cylindrical operation body 14 described later is provided on the outer periphery of the handlebar 3 on which the brake lever device 2 and the speed change operation device 6b are mounted.
- Sleeve body 17 is overfitted.
- the base end of the brake bracket 8 is provided with a cylindrical mounting portion 10 having a slit 9 that cuts out a part of the peripheral wall and penetrates the inner and outer peripheries. Then, the cylindrical mounting portion 10 is fitted over the outer peripheral portion of the resin sleeve 17 and the cylindrical mounting portion 10 is screwed by the mounting screw 11 which is screwed across the slit 9.
- the brake bracket 8 is attached to the handle bar 3 together with the resin sleeve 1 ⁇ ⁇ by forcibly reducing the inner diameter of the handlebar 3.
- the shift operating device 6b is formed integrally with the brake lever device 2b from the brake bracket 8 to the outer peripheral portion of the grip portion 4b. I have.
- the shift operation device 6b is a handle grip fixedly provided on the handle bar 3 so as to be rotatably fitted on the outer periphery in the axial direction of the right grip portion 4b of the handle bar 3. And a lock provided on the inner peripheral portion of the cylindrical mounting portion 10 of the brake bracket 8 on the inner side of the cylindrical control body 14 in the axial direction. It is roughly constituted by a mechanism 15 and a cable winding reel 16 rotatably supported by a support shaft 23 provided on the upper surface of the base end of the brake bracket 8.
- the tubular operating body 14 is rotatably supported on the outer periphery of a cylindrical sleeve body 17 which is fitted and fixed to the handlebar 13, and is rotatably gripped by the occupant. Operate the gripping operation part 18 and a drive reel part integrally formed inside the gripping operation part 18 in the vehicle width direction to pull or pull out the drive cable K with respect to the cable take-up reel 16. 19 and a connecting portion 20 connected to the locking mechanism I5 to operate the locking mechanism I5.
- the connecting portion 20 is formed by forming a concave-convex engaging tooth 20a at the inner end of the cylindrical operating body 14.
- the connecting portion is formed so as to engage with the connecting portion 36 of the locking mechanism 15 so as to be relatively non-rotatable, thereby operating the locking mechanism 15.
- a rubber outer jacket 21 is fitted around the outer periphery of the gripping operation section 18 so that the occupant can easily hold it, so that the handle 'grip 5 and its outer circumference are substantially continuous. Is formed.
- FIG. 2 is a plan view of the speed change operation device 6b according to the present embodiment
- FIG. 3 is a cross-sectional view along the center axis of the speed change operation device 6b.
- the speed change operation cable T is composed of an inner cable t1 and an outer cable t2 inserted into the inner cable t1, and the outer cable t2 is screwed inside the base end of the brake bracket 8.
- the inner cable t 1 is fastened to the fastening bolt 22 and the inner cable t 1 is wound around a cable winding reel 16 provided on the upper surface of the base end of the brake bracket 8.
- the cable take-up reel 16 has a substantially truncated conical shape as shown in FIGS. 4 and 5, and is rotatably supported by a support shaft 23 formed on the upper surface of the brake bracket 8. ing.
- the member denoted by the symbol & a is a cover that covers the above-mentioned cable reel.
- a second reel section 25 is provided for looping around a drive cable K extending from the section 19.
- the first reel portion 24 is provided on the reduced diameter side of the cable winding reel 16, and has a cable winding groove 24 formed by cutting off the inclined surface of the tapered trapezoid in the circumferential direction. a, and a nipple engaging hole 27 continuously formed in the tangential direction of the cable winding groove 24 a. Then, the force of the inner cable t1 of the speed change operation cable T is wrapped around the cable winding groove 24a, and the two nips 26 provided at the end thereof are inserted into the nipple locking holes 27. It is fixed.
- the second reel portion 25 is provided on the enlarged diameter side along the upper surface of the brake bracket 8 of the cable take-up reel 16, and substantially has a maximum outer diameter of the cable take-up reel 16.
- the cable winding groove 25a is formed along the line c.
- the end of the cable winding groove 25a is curved inward in the radial direction.
- 5 Nipple locking hole 30 is formed so as to be continuous with the end of Has been established.
- the speed change operation cable T is routed along the handlebar 3, and the inner cable t1 is extended from the fastening bolt 22 in a direction substantially parallel to the handlebar. Looped around the first reel section 24.
- the drive cable K is extended from the drive reel portion 19 of the tubular operating body 14 in a direction orthogonal to the handlebar 13, and the second reel of the cable winding reel 16 is provided. It is hung around the part 25.
- the drive cable K is inserted into the handlebar 3 in a tubular operation.
- the inner cable t 1 of the speed change operation cable T can be pulled in a direction along the handlebar 3.
- the other end of the I-action cable K is fixed to the cylinder operating member 14 by being accommodated in the nipple locking hole 31 provided along 19 a.
- a locking mechanism 15 for locking the rotation of the cylindrical operating body 14 in a stepwise manner is provided around the cylindrical mounting portion 10 of the brake bracket 8.
- a so-called click mechanism 32 is employed as the locking mechanism 15 according to the present embodiment.
- the click mechanism 32 is integrated with the tubular operating body 14 inside the tubular operating body 14 in the axial direction.
- the structure is roughly composed of a tallic ring 33 that can be turned around, an engagement body 34 that elastically contacts the outer circumference of the click ring 33, and a coil spring 35 that elastically urges the engagement body 34. Have been.
- the click ring 33 has a substantially cylindrical shape as shown in FIGS. 7 and 8, and is rotatably fitted on the sleeve 17 at the inner peripheral portion of the cylindrical mounting portion 10. Have been.
- a connecting portion 36 connected to the connecting portion 20 formed at the inner end of the tubular operating body 14 is formed.
- the plurality of engaging teeth 36 a formed on the connecting portion 36 are connected to the plurality of engaging teeth 36 a formed on the connecting portion 20.
- a plurality of engaging recesses' 37 a, 37 b ... extending in the axial direction are formed on the outer peripheral portion of the click ring 33.
- the cylindrical operating body 14 is engaged stepwise at a predetermined rotation position by elastically engaging the engagement recesses 37 a, 37 b,. It is configured to be stopped.
- the engaging body 34 is housed together with a coil spring 35 in a housing hole 39 provided at a base end of the brake bracket 8.
- the accommodation hole 39 has an opening 40 communicating with the inner periphery of the cylindrical mounting portion 10 of the brake bracket 8, and the claw portion 38 of the engaging body 34 is cylindrically mounted from the opening 40. It is configured so as to protrude inside the portion 10 and abut on the outer peripheral portion of the click ring 33.
- the speed change operation is performed by pulling or pulling out the inner cable t1 by rotating the cylindrical operation body 14. Can be.
- the gearshift operation can be performed reliably (in addition to the above, The inner cable t1 is not accidentally steered.
- the first reel unit 24 that wraps the above-described inner cable t1 around the cable take-up reel 16 and the second reel unit 2 that wraps the above-mentioned drive cable K and 5 provided, as schematically shown in FIG. 6, the first reel portion 2 4 of cable winding radius D, and, the second reel portion 2 5 of Ke Ichibu ⁇ winding radius D 2 It is set smaller.
- the traction force of the drive cable K wound around the second reel portion 25 is amplified to change the speed change operation cable t1 wound around the first reel portion 24. Can be towed.
- the driving The length of the speed change operation cable t1 wound on the first reel part 24 is shorter than the length of the drive cable wound on the reel part 19.
- the speed change operation cape The towing amount of t1 can be set small. For this reason, even when the number of gears is large, it is possible to set a large rotation operation angle of the tubular operating body 14 corresponding to each gear.
- the rotational position of the tubular operating body 14 corresponding to each gear can be set at large intervals. Therefore, when performing a gear shift, a delicate turning operation of the tubular operating body is not required, and the gear shifting operability can be greatly improved.
- the present invention is applied to the speed change operation device 6b including the cylindrical operation body 14 rotatably fitted and supported on the outer periphery of the grip portion of the handlebar.
- the present invention can be applied to a conventional speed change operation device having a speed change operation lever that can be used.
- the cable take-up reel 16 is provided on the upper surface of the brake bracket 8, but is not limited to this.
- the cable take-up reel can also be rotatably supported on a support shaft provided directly on an appropriate part of the bicycle frame or indirectly via a bracket or the like.
- the present invention is applied to the right shift operating device 6b for operating the rear transmission, but may be applied to the left shift operating device 6a for operating the front transmission 1a. ⁇ "
- another locking mechanism such as a force / ratchet mechanism employing the click mechanism 32 as the locking mechanism 15 may be employed.
- the speed change operation cable T is fixed to the brake bracket 8 in a direction along the washer bar 3, but in a direction orthogonal to the handlebar 3. From the brake bracket 8.
- the first reel portion 24 and the second reel portion 25 are separately formed on the cable take-up reel 16 by being shifted in the direction of the rotation axis.
- the first reel portion and the second reel portion are continuously formed in a spiral shape, and the speed change operation table is continuously wound around the spiral resole portion, and wound around the drive reel portion.
- the speed change cable also serves as the drive cable.
- the cable winding radius D 2 of the first reel unit 24 is set to be smaller than the cable winding radius D of the second reel unit 25 described above.
- the cable winding radius of the portion 24 can be set to be larger than the cable winding radius of the second reel portion 25.
- the cable winding radius is reduced. It can be changed by the circumferential position of the reel 16. Thereby, the traction force of the inner cable t1 or the amount of the cable tow can be changed depending on the rotational position of the tubular operation body 14.
- the cable winding radius is changed to reduce the amount of rotation of the speed changer.
- the cable tow I amount it is possible to make the rotation operation amount of the speed change operation body for performing the speed change operation to the adjacent shift speed substantially constant.
- the distance between the engagement recesses 37 a, 37 b... can be set constant.
- the operability of the variable speed operation device can be improved, and the processing of the click ring 33 becomes extremely easy, so that the manufacturing cost can be reduced.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Steering Devices For Bicycles And Motorcycles (AREA)
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6482592A JPH05270475A (ja) | 1992-03-23 | 1992-03-23 | 自転車用変速操作装置 |
JP4/64825 | 1992-03-23 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1993018960A1 true WO1993018960A1 (en) | 1993-09-30 |
Family
ID=13269414
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP1993/000335 WO1993018960A1 (en) | 1992-03-23 | 1993-03-22 | Gear shifter for bicycle |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0585473A4 (ja) |
JP (1) | JPH05270475A (ja) |
WO (1) | WO1993018960A1 (ja) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0671318A2 (en) * | 1994-03-07 | 1995-09-13 | Sram Corporation | Rotatable handgrip actuating system |
US5666859A (en) * | 1994-12-02 | 1997-09-16 | Fichtel & Sachs Ag | Latching shifter for a bicycle transmission |
US5799541A (en) * | 1994-12-02 | 1998-09-01 | Fichtel & Sachs Ag | Twist-grip shifter for bicycles and a bicycle having a twist-grip shifter |
US5823058A (en) * | 1994-12-02 | 1998-10-20 | Mannesmann Sachs Ag | Twist-grip shifter for bicycles and a bicycle having a twist-grip shifter |
US6055882A (en) * | 1995-09-20 | 2000-05-02 | Fichtel & Sachs Ag | Twist-grip shifter for bicycles |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6199447B1 (en) | 1994-03-07 | 2001-03-13 | Sram Corporation | Bulbous grip for rotatable bicycle gear shifter |
US5564316A (en) * | 1994-03-07 | 1996-10-15 | Sram Corporation | Nubbed grip for rotatable bicycle gear shifter |
JPH0844450A (ja) * | 1994-03-07 | 1996-02-16 | Sram Corp | 回動型グリップ作動装置及びその回り止め機構 |
US5590564A (en) * | 1995-11-20 | 1997-01-07 | Shimano, Inc. | Bicycle control device |
US5730030A (en) * | 1996-01-19 | 1998-03-24 | Shimano, Inc. | Shifting apparatus for bicycles having a brake operating unit disposed between first and second shifting levers |
GB2322909A (en) * | 1997-03-07 | 1998-09-09 | Jan Piotr Tchorzewski | Reduction mechanism for throttle linkages, eg for motorcycles |
US5904667A (en) * | 1997-03-17 | 1999-05-18 | C.R. Bard, Inc. | Rotatable control mechanism for steerable catheter |
US6276227B1 (en) * | 1997-07-24 | 2001-08-21 | Shimano, Inc. | Bicycle shift control device |
US6098490A (en) * | 1997-12-05 | 2000-08-08 | General Motors Corporation | Universal actuator assembly |
US6453766B1 (en) * | 1998-11-20 | 2002-09-24 | Shimano, Inc. | Force transfer mechanism for a bicycle transmission control cable |
US6389925B1 (en) * | 1999-02-16 | 2002-05-21 | Shimano Inc. | Shift operating device |
US8485060B2 (en) * | 2011-05-26 | 2013-07-16 | Shimano Inc. | Bicycle shift operating device |
CN111186523A (zh) * | 2018-11-14 | 2020-05-22 | 兰溪市捷克运动器材制造有限公司 | 一种前后刹联动的刹车把手 |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0246467Y2 (ja) * | 1984-12-14 | 1990-12-07 |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1605783A1 (de) * | 1966-12-23 | 1971-01-21 | Juy Lucien Charles Hippolyte | Betaetigungsvorrichtung,insbesondere fuer Geschwindigkeitswechselgetriebe von Fahrraedern,Fahrraedern mit Hilfsmotor und Motorraedern |
DE3012034A1 (de) * | 1980-03-28 | 1981-10-15 | Gustav Magenwirth Gmbh & Co, 7432 Urach | Gasdrehgriff fuer den lenker eines motorgetriebenen zweiradfahrzeuges |
DE3013008A1 (de) * | 1980-04-03 | 1981-10-08 | Gustav Magenwirth Gmbh & Co, 7432 Urach | Gasdrehgriff fuer den lenker eines motorgetriebenen zweiradfahrzeuges |
-
1992
- 1992-03-23 JP JP6482592A patent/JPH05270475A/ja active Pending
-
1993
- 1993-03-22 EP EP19930906802 patent/EP0585473A4/en not_active Ceased
- 1993-03-22 WO PCT/JP1993/000335 patent/WO1993018960A1/ja not_active Application Discontinuation
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0246467Y2 (ja) * | 1984-12-14 | 1990-12-07 |
Non-Patent Citations (1)
Title |
---|
See also references of EP0585473A4 * |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0671318A2 (en) * | 1994-03-07 | 1995-09-13 | Sram Corporation | Rotatable handgrip actuating system |
EP0671318A3 (en) * | 1994-03-07 | 1996-02-07 | Sram Corp | Rotary handle actuation device. |
US5666859A (en) * | 1994-12-02 | 1997-09-16 | Fichtel & Sachs Ag | Latching shifter for a bicycle transmission |
US5799541A (en) * | 1994-12-02 | 1998-09-01 | Fichtel & Sachs Ag | Twist-grip shifter for bicycles and a bicycle having a twist-grip shifter |
US5823058A (en) * | 1994-12-02 | 1998-10-20 | Mannesmann Sachs Ag | Twist-grip shifter for bicycles and a bicycle having a twist-grip shifter |
US6055882A (en) * | 1995-09-20 | 2000-05-02 | Fichtel & Sachs Ag | Twist-grip shifter for bicycles |
Also Published As
Publication number | Publication date |
---|---|
JPH05270475A (ja) | 1993-10-19 |
EP0585473A1 (en) | 1994-03-09 |
EP0585473A4 (en) | 1994-07-27 |
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