CN1059396C - Multi-speed operating device for bicycle - Google Patents
Multi-speed operating device for bicycle Download PDFInfo
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- CN1059396C CN1059396C CN95120453A CN95120453A CN1059396C CN 1059396 C CN1059396 C CN 1059396C CN 95120453 A CN95120453 A CN 95120453A CN 95120453 A CN95120453 A CN 95120453A CN 1059396 C CN1059396 C CN 1059396C
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Abstract
A shift control device includes a movable member having a cable support for supporting the transmission cable, wherein the movable member moves as the shifting device actuates the transmission. An assist spring is provided for biasing the movable member in a direction opposite a direction of biasing of the movable member by the return spring of the transmission. The cable support supports the transmission cable such that tension exerted by the assist spring on the transmission cable remains substantially constant regardless of a position of the movable member as the shifting device actuates the transmission. In a more specific embodiment, the cable support moves the transmission cable in a straight line, and the cable support may move the transmission cable without winding the transmission cable about the cable support.
Description
The present invention relates to a kind of speed-changing operating device for bicycle of operating bicycle gear device by the operation cable with return spring.
Above-mentioned speed-changing operation device, has assist spring, it can be to the variable speed operation member towards the pressuring direction opposite with the direction of exerting pressure of return spring, when need be when the opposite sense that acts on the direction of change-speed box with return spring carries out speed change, operation just can be implemented variable speed operation like a cork by the auxiliary variable speed of assist spring, the Rear Derailleur of being put down in writing just like Japanese kokai publication sho 61-205586 that this device is known.
Yet, in above-mentioned example, its variable speed operation member has its swinging center as central circular tube portion, when operation variable speed operation member, cylindrical portion can be rotated and the action of batching operation cable or releasing operation cable, and assist spring be frame on the load-carrying element of variable speed operation member and this variable speed operation member, the variable speed operation member swung towards low speed side exerts pressure, the pulling force that acts on the operation cable by assist spring be along with more to the high-speed side variable speed operation, pulling force is strong more.That is as shown in figure 13, the pulling force CT1 that is acted on the operation cable by assist spring can become bigger along with moving of variable speed operation member.
Therefore, be to use return spring in the past, to exchange the guide wheel pressurization that the chaining bar is used towards the mode of high-speed side effect, and, in the binding along with guide wheel acts on the transmission configuration that the pulling force of operation cable increases considerably by return spring when low speed side moves, when operation, as shown in figure 13, even assist spring acts on the pulling force CT1 of cable and the difference of the pulling force CT2 that return spring acts on cable also presents little difference in high-speed side, but, then still keep the big state of difference at low speed side, need big operating effort.That is to say, during with this speed-changing operation device, during variable speed operation when slowing down, because cutting the cable pulling force that assist spring acts on from the cable pulling force that return spring acted on is exactly the operating effort that will use, so, near the low speed side end during towards deceleration side speed change more operating effort is with still very big in the difference of the operating effort of high-speed side during towards the deceleration side speed change.
Again, when making change-speed box, be to be made into: return spring acts on the pulling force of operation cable no matter how guide wheel moves and all keep necessarily or roughly certain, even and the operation of planting change-speed box is considered at this point, also as shown in figure 15, the difference that acts on the pulling force CT1 of cable and the pulling force CT2 that return spring acts on cable because of assist spring is bigger at low speed side, though at the operating effort of low speed side during to low speed side speed change more, with more less than shown in Figure 13 in the difference of the operating effort of high-speed side during to the deceleration side speed change, but still there is difference significantly, thereby causes operability bad.
The purpose of this invention is to provide a kind of speed-changing operation device, even it is link to go up by return spring to act on that change-speed box that the pulling force of cable can change or pulling force keep necessarily or roughly certain change-speed box when operating, can both be very brisk and when high-speed side and low speed side are operated will with operating effort do not have difference, or carry out variable speed operation under can be in the difference of the operating effort very little state.
In order to achieve the above object, the present invention takes technical scheme as follows:
A kind of speed-changing operating device for bicycle, it is the bicycle gear device that has return spring by operation cable operation, it is characterized by: have the variable speed operation member and by the aforesaid operations cable towards the assist spring that moves the opposite sense of exerting pressure by the effect of above-mentioned return spring, above-mentioned variable speed operation member is exerted pressure; And the cable support portion that will support the aforesaid operations cable is arranged to: irrelevant with the operating position of above-mentioned variable speed operation member, acted on that the pulling force of operating cable is held in necessarily or roughly certain by above-mentioned assist spring.
Described speed-changing operating device for bicycle, it is characterized in that: above-mentioned variable speed operation member is to be supported on the base component rotationally, and above-mentioned assist spring is that an end is attached on the said base member and the other end is attached at the torsion-coil spring on the above-mentioned variable speed operation member.
Described speed-changing operating device for bicycle is characterized in that: above-mentioned cable support portion is the cable support portion that links operation cable and above-mentioned variable speed operation member, the shape that the aforesaid operations cable pull can be in line.
Described speed-changing operating device for bicycle, it is characterized in that: the position of cable support portion and outer tube maintaining part relation is arranged to: no matter move the non-productive operation power AF that torsional deflection produced that makes assist spring and take place how to change, all make the cable pulling force CT1 that acts on the interior cable between the cable strong point and the outer tube maintaining part by non-productive operation power AF all not change according to the operation of variable speed operation member.
Described speed-changing operating device for bicycle, it is characterized by: above-mentioned variable speed operation member is a kind of gear change hand lever that is supported in bicycle handle bar by the said base member rotationally, and, have towards 2 fingers of the moving direction decentralized configuration of above-mentioned variable speed operation member and pull operating portion, and have the operating position of above-mentioned variable speed operation member is kept in a plurality of location that can be engaged and break away from by positioning unit and above-mentioned positioning unit with depressed part detent mechanism.
Described speed-changing operating device for bicycle is characterized by: the said base member is the handle support that the brake control handle is installed on bicycle handle bar.
According to above formation, the present invention has following effect:
Promptly, during at the application force that change-speed box is overcome return spring and towards the direction of operating speed change, as adopt the words of assist spring, just add complementary operating effort, and must can reduce this part non-productive operation power owing to the auxiliary of assist spring with the operating effort that manual type applies, and this moment, even with the variable speed operation component operation to any operating position, because the cable support portion is cable to be supported to can make assist spring act on that the cable pulling force keeps necessarily or roughly certain, so, when if the operation return spring acts on the change-speed box that the pulling force of cable changes, because the cable pulling force CT1 that assist spring acted on, the cable pulling force CT2 that is acted on return spring becomes tensile relationship as shown in figure 14, compare with known example shown in Figure 13, can make it at the required manpower of low speed side, carry out variable speed operation under the situation about diminishing with difference at the required manpower of high-speed side.If the pulling force that operation acts on cable by return spring is to keep necessarily or during roughly certain change-speed box, by cable pulling force CT1 that assist spring acted on and cable pulling force CT2 by return spring acted on, to become tensile relationship as shown in figure 16, and compare with the known example of Figure 15, can make it at the required manpower of low speed side, and operate under than known little situation in the difference of the required manpower of high-speed side.When adopting the change-speed box of latter's form, if when adopting identical and the change-speed box that two pulling force are cancelled each other of the cable pulling force that cable pulling force that return spring acts on and assist spring are acted on, then become and to carry out variable speed operation under the zero no better than state in required manpower of low speed side and difference at the required manpower of high-speed side.Among Figure 13, Figure 14, Figure 15 and Figure 16, abscissa represents that from left to right ordinate is represented the cable pulling force from low speed to the most high-revolving shift position.
When even the operation return spring acts on the change-speed box that the cable pulling force can change, even perhaps the operation return spring acts on that the cable pulling force keeps necessarily or during roughly certain change-speed box, not only can under the state of the auxiliary force that obtains assist spring, operate, and, difference in low speed side and high-speed side action required power can be as known so not big, even according to the difference of change-speed box, can almost not feel difference ground and operate, no matter all can obtain brisk variable speed operation sense from operating effort or on the operation feeling.
When implementing speed-changing operation device of the present invention, shown in the 1st embodiment, if the variable speed operation member is made oscillating type, and when assist spring adopts torsion-coil spring, then support to and to compare by parallel mobile constituted mode by four linkage rod group with the variable speed operation member, can operate the variable speed operation member as long as be following the thrusting out one's fingers of state of holding handlebar, again, speed-changing operation device integral body can become comparatively small and exquisite.Thereby can be installed on handlebar very delicately and operation easily, simultaneously, can constitute the higher bicycle of commodity value.
When implementing speed-changing operation device of the present invention, shown in the 1st embodiment, if when adopting the structure of the shape that the operation cable pull can be in line, then can batch the operation cable or emit the cylindrical portion of cable with having, and, the speed-changing operation device that this cylindrical portion shape makes non-circular formation is compared,, just the cable pulling force of assist spring effect can be remained necessarily or roughly certain as long as cable support portion and outer tube maintaining part configuration settings are become suitable position relation.That is to say that it is suitable for simple structure the installation constitution of operation cable can be set at, and also can be made into more compact from this viewpoint.
When implementing speed-changing operation device of the present invention, shown in the 1st embodiment, if the variable speed operation member is equiped with 2 fingers that disperse on the variable speed operation moving direction and pulls operating portion, and be equiped with the detent mechanism of the operating position that is used for keeping the variable speed operation member, then can operate the variable speed operation member holding under the state of handlebar.That is, not only can operate like a cork outside the variable speed operation member with assist spring, and, can by detent mechanism make the variable speed operation member can not move operating position too many, carry out variable speed operation with suitably being positioned at the mode of deciding operating position.In addition, two finger pulling parts are configured to: wherein an orientation can maneuverable place in thumb, handlebar inner face side and be positioned at the position of handlebar downside for example, the opposing party then is positioned at the maneuverable place of forefinger, for example at the exterior side of handlebar and be positioned at the position of handlebar downside, even it is many at the gear number and under the situation that the actuating length of variable speed operation member is bigger, desire with the variable speed operation member when front side oscillation (rotation) is operated, in the middle of the whole operation stroke, all need only and utilize wherein a side finger pulling part just can be operated like a cork with thumb, if desire when the inner face side oscillation is operated, as long as in the middle of the whole operation stroke, all utilize the opposing party's finger pulling part, just can be operated like a cork with forefinger.Therefore, not only can be supported on and be convenient to carry out variable speed operation on the handlebar, and, even the gear number more for a long time, from variable speed operation member alignment function target location, or the comfort feature from the use of variable speed operation member, from the viewpoint of easy performance operating effort, can reach the effect of carrying out variable speed operation like a cork again.
When implementing transmission system of the present invention, shown in the 1st embodiment, if when base component is installed in handle support on the handlebar as the control handle of will braking, be that the structure that is installed in individually on the handlebar is compared then with adopting the brake control handle, can make whole speed-changing operation device smaller and more exquisite, and the variable speed operation member more is close to the hand grip portion of handlebar, and the hand that grips on the handlebar can be easy to operate the variable speed operation member.Thereby, not only can grip handlebar simultaneously and carry out variable speed operation, it is easier that action is become, and speed-changing operation device can be installed on the handlebar small and exquisitely.
Following embodiments of the invention being done with reference to accompanying drawing specifically describes:
Fig. 1 is the instruction diagram of expression according to the Rear Derailleur serviceability of the gear change hand lever of the embodiment of the invention, and variable speed operation member and change-speed box are the positions that is positioned at high-speed side.
Fig. 2 is the instruction diagram identical with Fig. 1, and variable speed operation member and change-speed box are the positions that is positioned at the dead slow side.
Fig. 3 is the lateral plan of Fig. 1,2 whole Rear Derailleur.
Fig. 4 is the top view of Fig. 1,2 whole speed-changing operation device.
Fig. 5 is the section-drawing of the speed-changing operation device of Fig. 4.
Fig. 6 is the section-drawing of gear change hand lever installation portion of the speed-changing operation device of Fig. 4.
Fig. 7 is the instruction diagram of indicating device of the speed-changing operation device of Fig. 4.
Fig. 8 is the instruction diagram of the cable pulling force that acted on by assist spring and return spring of the present invention.
Fig. 9 is the instruction diagram of assist spring shape of the present invention.
Figure 10 is the cable pulling force instruction diagram of expression by the assist spring effect of variable speed operation member of the present invention, CT1-1 represents the cable pulling force when 1 P PARK Position P quickens to be operated to 7 P PARK Position Ps, the cable pulling force when CT1-2 represents from 7 P PARK Position P deceleration-operation to 1 P PARK Position Ps.
Figure 11 is the skeleton diagram according to the speed-changing operation device of other embodiments of the invention.
Figure 12 is the instruction diagram by the cable pulling force of assist spring and return spring effect in Figure 11.
Assist spring when Figure 13 is change-speed box that can increase of the pulling force with guide wheel return spring effect when low speed side moves and known variable speed operation component composition, and return spring acts on the instruction diagram of cable pulling force.
Figure 14 is identical with Figure 13, and expression substitutes in the past variable speed operation member with the present invention, the instruction diagram of the cable tension when using speed-changing operation device of the present invention.
Figure 15 is identical with Figure 13, with the pulling force of guide wheel return spring effect when low speed side the moves assist spring when whether change-speed box and known variable speed operation component composition and the return spring instruction diagram that acts on the cable pulling force necessarily.
Figure 16 is the figure same with Figure 15, and expression substitutes known variable speed operation member and the instruction diagram of cable pulling force when using speed-changing operation device of the present invention.
As shown in Figure 4, can install on the handle support 22 of brake control handle 5 near the hand grip portion of handlebar 2,1 gear change hand lever 21 grade is being installed constitute speed-changing operating device for bicycle 20.This speed-changing operation device 20 is as shown in Figure 1, the operation cable 3 that utilization is made of cable outer tube 3a and interior cable 3b, be linked to bicycle use Rear Derailleur 10 with guide wheel 11 and return spring RS etc., operate Rear Derailleurs 10 by gear change hand lever 21 by operation cable 3, chain 4 is changed on 7 back-geared each gears that are suspended to bicycle rear driving usefulness, and it is constructed as follows in detail.
That is, as Fig. 4, Fig. 5 and shown in Figure 6, above-mentioned handle support 22 are that the belt portions 22a that will be located at brake control handle 5 opposite sides is embedded in handlebar 2 outward, and are fastened and be installed on the handlebar 2 with screw 22b is installed.On this handle support 22, be installed with by screw 23 is installed and fasten a fixing shaft component 24, and fasten pawl retainer 25 on handle support 22 by these shaft component 24 bolts, above-mentioned gear change hand lever 21 can be supported on this shaft component 24 freely around the axle center 24a of a shaft component 24 rotation, simultaneously, the nappe 26 that covers the base portion 21a etc. of gear change hand lever 21 is made into spline is assemblied on the end of a shaft component 24, and fixed with installation screw 27.An assist spring AS who is made of torsion-coil spring is housed in the base portion 21a of gear change hand lever 21, above-mentioned nappe 26 has an outer tube maintaining part 28 in order to the cable outer tube 3a of support operation cable 3, simultaneously, above-mentioned gear change hand lever 21 has: the interior cable 3b that can will operate cable 3 by blocking the cable head 3c that is supporting is attached at the cable connecting part 21b on this gear change hand lever 21, constitutes above-mentioned speed-changing operation device 20 thus.
In other words, gear change hand lever 21 is to be installed on the handlebar 2 with handle support 22 by a shaft component 24, can swing repeatedly around axle center 24a (rotation), on the part of giving prominence to from the nappe 26 of gear change hand lever 21, moving direction towards gear change hand lever 21 is provided with: separation and two finger pulling part 21A that be positioned at handlebar 2 downsides, 21B, by these the finger pulling parts any one come executable operations.That is, desire with gear change hand lever 21 when the swaying direction D shown in Figure 5 operation, as long as thumb is against finger pulling part 21A, only uses this finger pulling part 21A just can be operated in all speed change strokes, if desire with gear change hand lever 21 when as shown in Figure 5 the swaying direction U operation, then as long as forefinger is against finger pulling part 21B, only uses this finger pulling part 21B just can be operated in all speed change strokes.Again, with 7 on the location division 21c that is located at gear change hand lever 21 location depressed part 21e, and the resin system positioning pawl 29 that is installed in above-mentioned pawl retainer 25, formation can be maintained at gear change hand lever 21 detent mechanism of 7 predetermined operating positions.Also alternative positioning pawl 29, adopt the location with ball etc., therefore these are generically and collectively referred to as positioning unit 29.That is, if during swinging operation gear change hand lever 21, then the service portion 29a of positioning pawl 29 is broken away from after the depressed part 21e of location by operating effort, when snapping in another location depressed part 21e again, the operating position that gear change hand lever 21 is positioned to be scheduled to by this snapping in then.That is, gear change hand lever 21 is to move to the most high-revolving 7 P PARK Position Ps from 1 P PARK Position P of dead slow, the former is positioned at the position of the location depressed part 21e of top side in alignment with the service portion 29a of positioning pawl 29 among 7 location depressed part 21e, and the latter is positioned at the position of the location depressed part 21e of other end side position in alignment with the service portion 29a of positioning pawl 29 among 7 location depressed part 21e.Cable support portion 21b is because of gear change hand lever 21 moves to low speed side, interior cable 3b is pulled out from cable outer tube 3a, because of gear change hand lever 21 moves to high-speed side, interior cable 3b is regained, but, do not batch the interior cable 3b that is pulled out from cable outer tube 3a, become linearity but pull it.That is, at this moment, cable support portion 21b is along with gear change hand lever 21 moves, track of describing and non-rectilinear but circular arc, still, the interior cable 3b that is pulled out from cable outer tube 3a, then be no matter its amount of pulling out how, all be distracted into slightly linearly always and keep this state, so, claim this to be the shape draw operations that is in line.Assist spring AS is by an end being limited to the 25a of mount pad portion with respect to handle support 22 of pawl retainer 25, thereby card ends on handle support 22, and other end card ends on the base portion 21a of gear change hand lever 21 and gear change hand lever 21 is pressurizeed towards above-mentioned 1 P PARK Position P.That is, operated cable 3 effects, gear change hand lever 21 is exerted pressure towards the opposite sense that the return spring RS with change-speed box 10 exerts pressure.
As shown in Figure 8, when gear change hand lever 21 moves to the field operation of 7 P PARK Position Ps from 1 P PARK Position P, be to be that the arc track T at center moves along swinging center 24a with gear change hand lever 21 as the cable support portion 21b of the strong point of interior cable 3b.If when because of assist spring AS non-productive operation power AF in order to swinging operation gear change hand lever 21 having taken place on this track T, then can to the interior cable 3b between the outer tube maintaining part 28 cable pulling force CT1 take place at cable strong point 21b because of this non-productive operation power AF.Ratio with respect to the value of thrust of the non-productive operation power AF of this cable pulling force CT1, be that the leaning angle A with respect to interior cable 3b along with the straight line L by swinging center 24a and cable strong point 21b changes, so, even move at cable strong point 21b, the torsional capacity of assist spring AS changes, when thereby even non-productive operation power AF changes, as long as above-mentioned leaning angle A does suitably to change, cable pulling force CT1 does not just change, even or taken place to change also not can great changes will take place as non-productive operation power AF.And above-mentioned leaning angle A is the cable support portion 21b according to gear change hand lever 21, decides with the setting of the position relation of the outer tube maintaining part 28 of nappe 26.Therefore, as long as cable support portion 21b is become the words of suitable relevant position with outer tube maintaining part 28 configuration settings, the cable pulling force CT1 of cable 3b in then assist spring AS acts on, in any velocity location of gear change hand lever 21 being operated 7 P PARK Position Ps from 1 P PARK Position P, and, from operating any one grade velocity location of 7 P PARK Position Ps between 1 P PARK Position P and 2 P PARK Position Ps or between 4 P PARK Position Ps and 5 P PARK Position Ps from 1 P PARK Position P, that is to say that all big activation keeps certain on any operating position in whole operation field.In view of the above, at assist spring AS is to have adopted torsion-coil spring as shown in Figure 9, and when cable support portion 21b and outer tube maintaining part 28 be configured to as shown in Figure 8 relevant position, then as shown in figure 10, the cable pulling force that assist spring AS is produced is no matter where the operating position of gear change hand lever 21 is positioned at, even also can remain when quickening operation certain (CT1-1), perhaps, even also can remain certain (CT1-2) when making deceleration-operation.
That is, when concrete numerical value being described according to present embodiment, if the interior cable 3b of cable support portion 21b is configured to: when gear change hand lever 21 during at 1 P PARK Position P, the axle center of interior cable 3b between the outer tube maintaining part 28 to cable support portion 21b is in the about 25.9mm part of the distance D 1=of the swinging center 24a of distance gear change hand lever 21, and when gear change hand lever 21 during at 7 P PARK Position Ps, then outer tube maintaining part 28 will be positioned at the about 29mm of the distance D 7=that leaves above-mentioned swinging center 24a place with the axle center of the interior cable 3b of cable support portion 21b.And, pull down positioning pawl 29 grades, when making under its state that does not act on gear change hand lever 21 operation gear change hand lever 21, manage outside maintaining part 28 places measure in cable 3b taken place pulling force the time, measure cable pulling force CT1-1 as shown in figure 10, CT1-2.That is, be 3.35～3.4kgf with the measured value of gear change hand lever 21 cable pulling force CT1-1 when 1 P PARK Position P operation accelerates to 7 P PARK Position Ps.The measured value of its cable pulling force CT1-2 is 2.72～2.68kgf during from 7 P PARK Position P deceleration-operation to 1 P PARK Position P with gear change hand lever 21.That is to say, even the pulling force of cable 3b is that the summary of 2.68～3.4kgf keeps certain pulling force CT1 in being acted on by assist spring AS when gear change hand lever 21 operated any operating position in whole operation field.At this, the difference of the cable pulling force (CT1-2) when cable pulling force (CT1-1) when quickening speed change for gear change hand lever 21 and deceleration speed change takes place because of friction.
The constituted mode of Rear Derailleur 10 is as Fig. 1,2 and shown in Figure 3.That is, the supporter 14 of guide wheel 11 and tension roller 12 will be installed by chain guide for use 13, with be linked to trailing wheel with pitching 1 protrusions that is constituted 15 by linking board 15a with bolt, utilize the swing connecting bar 16,17 of pair of right and left to be linked, simultaneously, form parallel four-bar linkage R1 by supporter 14 and swing connecting bar 16,17 and protrusions 15.Swing connecting bar 16 from pair of right and left, the operation armed lever 16a of portion that right side swing connecting bar 16 among 17 is extended towards left side swing connecting bar 17 is between the supporter 14, the return spring RS that installation one is made of the pulling force coil spring, the connecting to and in the part that axle center B rotates, to have adorned the 1st tension spring S1 that torsion-coil spring constitutes of protrusions 15, and the 2nd a tension spring S2 who is made of torsion-coil spring can be housed in the part that axle center P rotates connecting to of supporter 14 with chain guide for use 13 with linking board 15a.Protrusions 15 has the outer tube maintaining part 18 in order to the cable outer tube 3a of support operation cable 3, and has and use the fixing interior cable 3b bolt that will operate cable 3 with screw 19 of cable tightly to be linked to the cable support portion that the aforesaid operations armed lever 16a of portion is constituted.
That is guide wheel 11 is to utilize parallel four-bar linkage R1, can reciprocatingly be installed on the 1a of erection of transmission portion that stretches out with fork 1 fork end from trailing wheel towards the car body transverse direction.That is, guide wheel 11 is as shown in Figure 2, can reciprocatingly chain 4 be hanged up 1 P PARK Position P that among 7 backgears, is positioned at the low speed gear of the most inboard maximum outside diameter of car body toward the car body transverse direction, and as shown in Figure 1, chain 4 is hanged up between 7 P PARK Position Ps at the top gear of the outermost minimum outer diameter of car body, do move operation in regular turn from 7 back-geared path sides to big footpath side and chain is changed with the pulling force of interior cable 3b and be suspended to low speed side by high-speed side, on the other hand, do move operation with the elastic recovering force of return spring RS in regular turn from 7 back-geared big footpath sides to the path side and by low speed side chain is changed and to be suspended to high-speed side.The end of the 1st tension spring S1 is limited to and links board 15a, and the other end is to be limited to protrusions 15 and protrusions 15 is exerted pressure around axle center B swaying direction BF with pitching 1 with respect to trailing wheel, thereby through guide wheel 11 and tension roller 12 pulling force is added on the chain 4.Again, the end of the 2nd tension spring S2 be limited to supporter 14 and the other end be limited to chain guide for use 13, to chain guide for use 13 with respect to the exerting pressure of supporter 14 around axle center P swaying direction PF, thereby pulling force is added to chain 4 via guide wheel 11 and tension roller 12.
As shown in Figure 8, at Rear Derailleur 10, when guide wheel 11 when 1 P PARK Position P moves to the moving range of 7 P PARK Position Ps, the cable of using as the point of contact of interior cable 3b is fixing with screw 19, is that connecting pin axle center X along right swing connecting bar 16 and the binding center of protrusions 15 is that the arc track T at center moves.If cable pulling force CT2 because of return spring RS has taken place to make by reversing during operating effort RF of right swing connecting bar 16 swings, because of this operating effort RF that reverses, can take place in the part from the point of contact 19 of interior cable 3b to outer tube maintaining part 18 in supposition on this track T.Value of thrust ratio with respect to the operating effort RF that reverses of cable pulling force CT2, because of according to changing with respect to connecting pin axle center X and the leaning angle A of the interior cable 3b of straight line L by point of contact 19, so point of contact 19 also is moved according to moving of guide wheel 11, because the length of return spring RS also changes, even operating effort RF changes so reverse, as long as the words that above-mentioned leaning angle A suitably changes, cable pulling force CT2 just can not change, perhaps, even change also can be set at unlike the operating effort RF that reverses so big variation takes place.Above-mentioned leaning angle A is decided with the setting of the relevant position of the outer tube maintaining part 18 of protrusions 15 by the cable point of contact 19 of right walking bar rod 16, so, by suitably setting the relevant position of cable point of contact 19 with outer tube maintaining part 18, suppose on guide wheel 11 and the tension spring 12 not chaining bar 4, can on guide wheel 11, not act on when hanging antagonistic force from changing of being taken place of chain 4, act on the pulling force CT2 of interior cable 3b because of return spring RS, in the arbitrary speed threshold position of guide wheel 11 from 1 P PARK Position P to 7 P PARK Position Ps, or 1 between P PARK Position P and 2 P PARK Position Ps or the arbitrary speed threshold position from 1 P PARK Position P to 7 P PARK Position Ps between 4 P PARK Position Ps and 5 P PARK Position Ps, that is, even the arbitrary position in whole mobile field is moved and also can be kept necessarily or roughly certain.In view of the above, decide the configuration of cable point of contact 19 with the outer tube maintaining part seat 18 of right swing connecting bar 16, then can be on guide wheel 11 and tension roller 12 chaining bar 4 and changing under the state of hanging antagonistic force from chain 4 can not taken place not at guide wheel 11, no matter the position of guide wheel 11 how, acted on all on the interior cable 3b that return spring RS taken place, the cable pulling force CT2 of 2.68～3.4kgf.
That is to say, if use 3 of operation cables that Rear Derailleur 10 and speed-changing operation device 20 are linked together and be not installed on car body, even or be installed on car body and also chain 4 do not hanged up in guide wheel 11 and tension roller 12, make changing under the state of hanging antagonistic force from chain 4 do not taken place on the guide wheel 11, and positioning pawl 29 does not act under the state of gear change hand lever 21 yet.If when operating gear change hand lever 21 with this understanding, the arbitrary speed threshold position of gear change hand lever 21 then from 1 P PARK Position P to 7 P PARK Position Ps, or 1 the arbitrary speed threshold position from 1 P PARK Position P to 7 P PARK Position Ps such as between P PARK Position P and 2 P PARK Position Ps or between 4 P PARK Position Ps and 5 P PARK Position Ps, that is, even when being positioned at any position in whole operation field, the cable pulling force CT2 of cable 3b in return spring RS acts on, the cable pulling force CT1 that acts on interior cable 3b with assist spring AS keeps mutual balance.
That is, when desiring,, gear change hand lever 21 is operated towards swaying direction D as Fig. 1 and shown in Figure 5 toward the deceleration side speed change.So, cable 3b in gear change hand lever 21 pull operation, and interior cable 3b makes return spring RS that elastic deformation take place and with guide wheel 11 together with tension roller 12 towards body inner side move.Thus, guide wheel 11 changes chain 4 and hangs to big footpath side from backgear path side, and gear just switches to low speed side from high-speed side.At this moment, even when switching to any gear from 1 grade to 7 grades, interior cable 3b also keeps mutual balance because of the pulling force CT2 of return spring RS effect and the pulling force CT1 of assist spring AS effect, is assisted by assist spring AS and make return spring RS that the big young pathbreaker of elastic deformation necessary operations power be taken place.Thereby, as long as be applied to the operation resistance that manpower on the gear change hand lever overcomes the friction force of the cable outer tube 3a of the resistance that changes the chaining bar that acts on the guide wheel 11, operation cable 3 and interior cable 3b and taken place because of positioning pawl 29, can operate gear change hand lever 21.
In addition, as desire as Fig. 2 and shown in Figure 5, gear change hand lever 21 to be operated towards swaying direction U when the acceleration side speed change.So gear change hand lever 21 is put back to interior cable 3b, and because of putting back to this cable, return spring RS the elastic recovering force effect takes place and with guide wheel 11 together with tension roller 12 overcomes the antagonistic force that changes the chaining bar that acts on two pulleys 11,12 outside car body side shifting.Thus, guide wheel 11 changes chain 4 and hangs to the path side from back-geared big footpath side, and gear then switches to high-speed side from low speed side.At this moment, even when 1 grade switches to any gear of 7 grades, interior cable 3b also keeps mutual balance because of the pulling force CT2 of return spring RS effect and the pulling force CT1 of assist spring AS effect, is assisted by return spring RS and desire to make assist spring AS that elastic deformation necessary operations power size takes place.Thereby, overcome cable outer tube 3a and the friction force of interior cable 3b that acts on operation cable 3 as long as be added in the manpower of gear change hand lever 21, reach the operation resistance that is taken place because of positioning pawl 29, can operate gear change hand lever 21.
As shown in Figure 7, from the nappe 26 of gear change hand lever 21 that expose and, the pointer sign 31 that has placed arrow type on the outer circumferential surface section 21d of car body back, simultaneously, corresponding to nappe 26 above-mentioned outer circumferential surface section 21d's and, the 26a of wall portion towards the car body back goes up, has 7 digital gear signs 32 ..., constitute in order to show the shift tower 30 of speed change gear by above-mentioned outer circumferential surface section 21d and the 26a of wall portion.
That is, when swing gear change hand lever 21, moving with respect to the 26a of wall portion takes place in outer circumferential surface section 21d, when gear change hand lever 21 when 1 P PARK Position P becomes desired operating position 7 P PARK Position Ps, then pointer sign 31 can 7 gear signs 32 of indication in corresponding to the operating position of gear change hand lever 21, can know that thus pointer sign 31 just indicating at that gear bit flag 32, can judge that gear switching to from the 1st grade to the 7th grade.And, also can gear change hand lever 21 as the pointer member, and nappe 26 is used as the marking panel member, structure is simplified, can be made into shift tower.
Fig. 5 and Fig. 6 represent to set with screw 33, make to set with the depressed part of the leading section embedding gear change hand lever 21 of screw 33 and block only on gear change hand lever 21, to be installed on the cladding plate body 26.When setting when ending on gear change hand lever on 21 with screw 33 cards, gear change hand lever 21 is fixed on the 7th P PARK Position P.That is to say, when utilizing operation cable 3 to link Rear Derailleur 10 and speed-changing operation device 20 being assemblied on the car body, owing to Rear Derailleur 10 is pressed in the 7th P PARK Position P by return spring RS, so, if when gear change hand lever 21 one side is maintained 7 P PARK Position Ps that can resist the assist spring AS that is in the strongest deformation state of elastic force and installs, then can easily link operation.Thereby, when operating the binding of cable 3, if will set with screw 33 and place active position earlier, because of not needing gear change hand lever 21 is maintained at the manual operation of 7 P PARK Position Ps that can overcome assist spring AS, so, can link operation like a cork.Then, when finishing this binding operation, just removable the setting down used screw 33, or ends the non-working position that acts on because of screw 33 leading sections switch to the releasing card from gear change hand lever 21 disengagings, can use gear change hand lever 21 thus.And, if adopt setting spiral shell screw 33 gear change hand lever 21 can be maintained at 7 P PARK Position Ps, the engaging power of detent mechanism is strengthened, so a little less than can setting for the engaging power that gear change hand lever 21 is maintained at the operating position of regulation of detent mechanism.Promptly, when if the pulling force of assist spring AS and return spring RS has evident difference, engaging power must be set at and overcome its pulling force difference and gear change hand lever 21 can be maintained operating position, can make the effect of detent mechanism performance regulation, but, if the mechanism that the pulling force of employing assist spring AS and the pulling force of return spring RS can keep balance mutually, as long as then the location can prevent that with engaging power gear change hand lever 21 is moved just passable because of vibration etc., simultaneously, can allow the people pick out the faint engaging power of degree that gear change hand lever 21 has switched to the operating position of regulation, also can make the effect of detent mechanism performance regulation.Its result can be suppressed to the variable speed operation resistance that detent mechanism took place seldom and can operate speed change like a cork.
Except setting with the screw 33, also can adopt pin, key or make the obturator etc. at the regulation place that can be filled between gear change hand lever and the nappe can obtain same effect.Also can adopt the various shelves that switch at active state and releasing active state to end device.Other embodiment
Figure 11 is the speed-changing operation device 40 that shows the structure with other embodiment.That is, the base component 41 that is fixed on the handlebar 2 is arranged, have the gear change hand lever 42 of the operation armed lever 42a of portion, use a pair of swing connecting bar 43,44 to be linked, simultaneously, constitute parallel four-bar linkage R2 by base component 41 and swing connecting bar 43,44 and gear change hand lever 42.In a pair of swing connecting bar 43, be equipped with one between 44a of armed lever portion that stretches out in 44, from a side swing connecting bar 44 and the base component 41 by assist spring AS that tension spring constituted, the required outer tube maintaining part 18 of cable outer tube 3a that has support operation cable 3 on gear change hand lever 42 then is that the interior cable 3b that has operation cable 3 uses the fixing cable support portion 44b that is linked with screw 19 of cable at the above-mentioned armed lever 44a of portion.
As shown in figure 12, under speed-changing operation device 40 occasions of this parallel four link type, as the cable of the point of contact of interior cable 3b fixing be to be that the arc track T at center moves with screw 19 along connecting pin axle center X with the binding center of swing connecting bar 44 and installation component 41.Supposing at this track T has the non-productive operation power AF that makes swing connecting bar 44 swings that assist spring AS acted on, because of this non-productive operation power AF 18 is being the part generation cable pulling force CT1 of interior cable 3b extremely from cable point of contact 19 to the outer tube maintaining part.Ratio with respect to the value of thrust of the non-productive operation power AF of this cable pulling force CT1, be according to changing with respect to leaning angle A by cable 3b within the straight line L of connecting pin axle center X and cable point of contact 19, so, even the non-productive operation power AF cause the length according to assist spring AS to change because of moving of cable point of contact 19 also changes, as long as above-mentioned leaning angle A makes appropriate change, cable pulling force CT1 just can not change, or, can not play so big variation even taken place to change as non-productive operation power AF yet.And, because above-mentioned leaning angle A is the cable point of contact 19 according to swing connecting bar 44, determine with the setting of the relevant position of the outer tube maintaining part 18 of gear change hand lever 42, so, by the relevant position of suitably setting cable support portion 44b and outer tube maintaining part 18, how the cable pulling force CT1 that assist spring AS is acted on will change regardless of the operating position of gear change hand lever 42 all keeps certain or is roughly certain.And, this speed-changing operation device, owing to use the identical structure of parallel four-bar linkage that adopts with transmission side, so, if the specifications such as size of parallel four-bar linkage R2 are formed specifications such as size with the parallel four-bar linkage R1 of change-speed box 10 when identical, the pulling force CT1 of the interior cable 3b that the assist spring AS of speed-changing operation device 40 is acted on will become identical with pulling force CT2 at the interior cable 3b that return spring RS acted on of change-speed box 10 and is set as mutual maintenance balance easily.That is, identical if specifications such as size that will be each other form, more further will springback power each other form when substantially the same, pulling force CT1 can become identical with CT2 and keep balance mutually.
Speed-changing operation device of the present invention is except can using for Rear Derailleur, also applicable to Front Derailleur.
Be installed in the speed-changing operation device on the handlebar, be supported in handle support 22 and be installed on the handlebar 2 except being made into, can certainly be made into and have the special-purpose installation component different and separate with the handle 5 of braking and be installed in individually on the handlebar 2 with handle support 22 together with brake handle 5.Again, outside above-mentioned gear change hand lever 21,42, rotatable is nested on the handlebar speed-changing operation device that constituted with hand grip portion that forms handlebar and the swinging operating body that adopts the operation cable to operate change-speed box freely also applicable to the present invention.Thereby, these gear change hand levers or swinging operating body are generically and collectively referred to as variable speed operation member 21,42, and handle support 22 is called base component 22.
Speed-changing operation device of the present invention also can be used in return spring chain is changed the change-speed box of extension member towards the low speed side operation except hanging member towards the change-speed box of high-speed side operation uses for return spring is changed chain.At this moment, assist spring is to make the variable speed operation member is exerted pressure towards high-speed side.
As shown in the Examples, the cable pulling force that return spring acted on, no matter the position of guide wheel how, all keep necessarily or roughly certain numerical value, and, for the purpose of operating the change-speed box that the cable pulling force that is acted on assist spring keeps mutual balance, except using the present invention, though speed-changing operation device of the present invention also can be used in cable pulling force that return spring acts on for necessarily or roughly certain, but not necessarily to keep the cable pulling force that change-speed box or return spring acted on of mutual balance be the change-speed box that changes along with speed change to the cable pulling force that is acted on assist spring, and help the improvement that benefits operability.
Claims (6)
1, a kind of speed-changing operating device for bicycle, it is the bicycle gear device (10) that operation has return spring (RS) by operation cable (3), it is characterized by: have variable speed operation member (21,42) and by aforesaid operations cable (3) towards the assist spring (AS) that moves the opposite sense exert pressure by the effect of above-mentioned return spring (RS), above-mentioned variable speed operation member (21,42) is exerted pressure; And will support the cable support portion (21b of aforesaid operations cable (3), 44b) be arranged to: irrelevant with the operating position of above-mentioned variable speed operation member (21,42), acted on that the pulling force of operating cable (3) is held in necessarily or roughly certain by above-mentioned assist spring (AS).
2, speed-changing operating device for bicycle as claimed in claim 1, it is characterized in that: above-mentioned variable speed operation member (21) is to be supported on rotationally on the base component (22), and above-mentioned assist spring (AS) is that an end is attached at that said base member (22) is gone up and the other end is attached at the torsion-coil spring on the above-mentioned variable speed operation member (21).
3, speed-changing operating device for bicycle as claimed in claim 1 or 2 is characterized in that: above-mentioned cable support portion (21b) is the cable support portion that links operation cable (3) and above-mentioned variable speed operation member (21), aforesaid operations cable (3) can be distracted into linearity.
4, speed-changing operating device for bicycle as claimed in claim 1 or 2, it is characterized in that: the position relation of cable support portion (21b) and outer tube maintaining part (28) is arranged to: no matter move the non-productive operation power AF that torsional deflection produced that makes assist spring (AS) and take place how to change, all make the cable pulling force CT1 that acts on the interior cable (3b) between cable strong point 21b and the outer tube maintaining part (28) by non-productive operation power AF all not change according to the operation of variable speed operation member (21).
5, speed-changing operating device for bicycle as claimed in claim 2, it is characterized by: above-mentioned variable speed operation member (21) is a kind of gear change hand lever that is supported in bicycle handle bar (2) by said base member (22) rotationally, and, have towards 2 fingers of the moving direction decentralized configuration of above-mentioned variable speed operation member and pull operating portion (21A), (21B), and have the operating position of above-mentioned variable speed operation member (21) is kept in a plurality of location that can be engaged and break away from by positioning unit (29) and above-mentioned positioning unit (29) with depressed part (21e) detent mechanism.
6, speed-changing operating device for bicycle as claimed in claim 5 is characterized by: said base member (22) is the handle support that brake control handle (5) is installed on bicycle handle bar (2).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31623294A JP3445852B2 (en) | 1994-12-20 | 1994-12-20 | Speed change device for bicycle |
| JP316232/1994 | 1994-12-20 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1133807A CN1133807A (en) | 1996-10-23 |
| CN1059396C true CN1059396C (en) | 2000-12-13 |
Family
ID=18074790
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN95120453A Expired - Fee Related CN1059396C (en) | 1994-12-20 | 1995-12-20 | Multi-speed operating device for bicycle |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP3445852B2 (en) |
| CN (1) | CN1059396C (en) |
| TW (1) | TW276229B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW448901U (en) | 2000-05-19 | 2001-08-01 | Nat Science Council | Velocity control device |
| EP1630094B1 (en) * | 2004-08-31 | 2007-05-30 | Campagnolo S.R.L. | Actuation device for a control cable for a bicycle gearshift, with rotatable support of the cable-winding bush |
| US7650813B2 (en) * | 2005-05-19 | 2010-01-26 | Shimano Inc. | Position control mechanism for bicycle control device |
| US8277346B2 (en) | 2006-02-28 | 2012-10-02 | Shimano, Inc. | Low profile rear derailleur |
| CN101704400B (en) * | 2006-02-28 | 2014-01-08 | 株式会社岛野 | Low outline rear derailleur |
| US10053181B2 (en) * | 2012-05-30 | 2018-08-21 | Shimano Inc. | Bicycle shift operating device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2099961A (en) * | 1978-10-06 | 1982-12-15 | Shimano Industrial Co | Control lever for a cycle |
| EP0392457A1 (en) * | 1989-04-11 | 1990-10-17 | Shimano Inc. | Speed control apparatus for a bicycle |
-
1994
- 1994-12-20 JP JP31623294A patent/JP3445852B2/en not_active Expired - Fee Related
-
1995
- 1995-01-28 TW TW84100841A patent/TW276229B/en active
- 1995-12-20 CN CN95120453A patent/CN1059396C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2099961A (en) * | 1978-10-06 | 1982-12-15 | Shimano Industrial Co | Control lever for a cycle |
| EP0392457A1 (en) * | 1989-04-11 | 1990-10-17 | Shimano Inc. | Speed control apparatus for a bicycle |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1133807A (en) | 1996-10-23 |
| JPH08169386A (en) | 1996-07-02 |
| TW276229B (en) | 1996-05-21 |
| JP3445852B2 (en) | 2003-09-08 |
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Granted publication date: 20001213 Termination date: 20111220 |