CN1133806A - Multi-speed gear for bicycle - Google Patents
Multi-speed gear for bicycle Download PDFInfo
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- CN1133806A CN1133806A CN 95120450 CN95120450A CN1133806A CN 1133806 A CN1133806 A CN 1133806A CN 95120450 CN95120450 CN 95120450 CN 95120450 A CN95120450 A CN 95120450A CN 1133806 A CN1133806 A CN 1133806A
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Abstract
The invention discloses a gear change mechanism used for a bicycle, which includes a bicycle transmission (derailer) provided with a hanging-change chain component, a first connecting mechanism used for arranging the hanging-change chain component on the body of the bicycle to lead the hanging-change chain component to move to and fro and a recuperator spring used for exerting pressure on the hanging-change chain component to the single direction of the reciprocative movement, and a gear change operating mechanism provided with a gear change operation component and a second connecting mechanism used for arranging the gear change operation component on the body of the bicycle to lead the hanging-change chain component to move to and fro; and simultaneously an operating cabled twist can be used for operating the gear change mechanism used for a bicycle.
Description
The invention relates to bicycle transmission, it comprises:
Bicycle gear device (derailer) has: change chaining bar member, in order to this is changed chaining bar member with the 1st connect mechanism that can reciprocatingly be installed on bicycle body and in order to the above-mentioned chaining bar member that changes towards the return spring of exerting pressure toward the above-mentioned single direction that moves back and forth; And speed-changing operation device, have: variable speed operation spare and in order to this variable speed operation spare can reciprocally being installed on the 2nd connect mechanism of bicycle body, and can operate above-mentioned bicycle gear device via the operation cable.
In above-mentioned transmission system, known in the past have for example a kind of: the bicycle use Rear Derailleur that 61-No. 205586 communiques of Japanese kokai publication sho are disclosed.Be that be provided with in speed-changing operation device can be with auxiliary the use spring of variable speed operation member towards the pressuring direction opposite with the direction of being exerted pressure by return spring, when carrying out towards the time with the rightabout speed change of direction of operated this change-speed box of return spring, can utilize and auxiliary assist at this moment variable speed operation, and be able to carry out very airily variable speed operation with spring.
Yet, above-mentioned known example, if attempt out: return spring is example with change-speed box towards the change-speed box of exerting pressure toward the high speed gear side, by the auxiliary relation that is betided between tension force CT1 that operates cable and the tension force CT2 that is betided the operation cable by return spring with spring is shown in the 14th figure or the 15th figure, among Figure 14 and Figure 15, abscissa is represented the shift position from the low gear to the high speed gear, and ordinate is represented cable tension.That is, and even by cable tension CT2 that return spring produced with by auxiliary all have from the gamut of low speed gear position high speed gear position with cable tension CT1 that spring produced significantly different, and even perhaps among the scope of low speed gear position high speed gear position, have only small part unanimity mutually.
Be the transmission system of this form, when desiring to carry out the speed change towards low speed side, required operation strength is: from the cable tension that return spring produced deduct auxiliary with the strength after the cable tension that spring produced, add speed-changing operation device change the chaining bar time resistance, add the strength of the friction force of operating cable; And when desiring to carry out speed change towards high-speed side, required operation strength is: by the auxiliary friction force of operating cable that adds with the cable tension that spring produced.Therefore, transmission system in the past is shown in the 14th figure and the 15th figure, and along with the speed change of carrying out toward low speed side, the spring strength of return spring can increase, on the other hand, and the auxiliary tendency that minimizing is then arranged with the spring strength of spring; Relatively, along with the speed change of carrying out toward high-speed side, the spring strength of return spring can reduce, the auxiliary tendency that increase is then arranged with the spring strength of spring.That is, being to have the situation of the transmission system of this length tension relation shown in the 14th figure, required operation strength and operation strength required when high-speed side is carried out variable speed operation has a long way to go when low speed side carries out variable speed operation.Even be to have under the situation of transmission system of length tension relation of the 15th figure, though the gap of its operation strength is less than the transmission system with the length tension relation shown in the 14th figure, but, required operation strength and operation strength required when high-speed side is carried out variable speed operation clearly difference still when low speed side carries out variable speed operation.
The object of the present invention is to provide a kind of bicycle transmission, no matter towards either party of speedup or deceleration side when carrying out speed change, no matter be when switching to that gear perhaps, all can be very slim and graceful, and be to carry out speed change with certain or intimate certain operation strength.
In order to reach above-mentioned purpose, the present invention takes following technical scheme:
A kind of bicycle transmission comprises:
Have change chaining bar member (11), in order to this is changed chaining bar member (11) with the 1st connect mechanism (R1) that can reciprocatingly be installed on bicycle body and in order to the above-mentioned bicycle gear device (10) that changes the return spring (RS) that chaining bar member (11) exerts pressure towards the above-mentioned single direction that moves back and forth; And have variable speed operation member (21,42) and in order to this variable speed operation member (21,42) can reciprocatingly be installed on the 2nd connect mechanism (22 of bicycle body, 24, R2), have the speed-changing operation device (20,40) of operating above-mentioned bicycle gear device (10) via operation cable (3) simultaneously, it is characterized by:
Above-mentioned speed-changing operation device (20,40) is provided with: in order to the application of force direction opposite sense of above-mentioned variable speed operation member (21,42) court with above-mentioned return spring (RS), make the auxiliary with spring (AS) of the mobile pressuring direction of above-mentioned change-speed box (10); And
Above-mentioned variable speed operation member (21 no matter, 42) operational ton how, all makes the roughly the same above-mentioned return spring (RS) and the above-mentioned auxiliary usefulness spring (AS) installed of tension force (CT2) and above-mentioned auxiliary tension force (CT1) with spring (AS) aforesaid operations cable (3) that put on of above-mentioned return spring (RS) aforesaid operations cable (3) that put on.
Described bicycle transmission, it is characterized in that: above-mentioned return spring (RS) and above-mentioned auxiliary each tension force with spring (AS) the aforesaid operations cable that is added on (3) (CT1, CT2), above-mentioned variable speed operation member (21 no matter, 42) operational ton how, is all necessarily or roughly certain.
Described bicycle transmission, it is characterized in that: above-mentioned the 2nd connect mechanism (22,24) comprising: be supported on bicycle body base component and in order to above-mentioned variable speed operation member (21) to be attached to shaft component of above-mentioned base component swingably;
Above-mentioned auxiliary be that the one end is linked to above-mentioned base component with spring (AS), the other end is linked to the torsional mode coil spring of above-mentioned variable speed operation member (21); Above-mentioned variable speed operation member (21) has the connecting part (21b) that the tension of operation cable (3) can be held in linearity.
According to above-mentioned formation, the present invention has following effect:
That is, when desire is carried out speed change with chain towards a wherein side who quickens or slow down, and make pull out the words that side operate of variable speed operation member towards the operation cable, because being drawn out of this operation cable, make return spring elastic recovery and move operation changes chaining bar member, make with this and change the action of changing the chaining bar that chaining bar member is scheduled to.When carrying out this variable speed operation, in order to pull out the operation cable, must operate the variable speed operation member destroying the cable tension and auxiliary state of equilibrium that return spring was produced, and must operate this variable speed operation member with the strength of the detent mechanism that overcomes the friction force of operating cable and variable speed operation member with the cable tension that spring was produced.Suppose: change-speed box and speed-changing operation device just utilize the operation cable to be linked, when not being installed in car body, though perhaps be installed on the car body, but chain still be unkitted be hung on change-speed box change chaining bar member (in other words, resistance when changing the chaining bar does not act on change-speed box as yet) the words of state, no matter the variable speed operation member is arranged in which position of its operating area, all because above-mentioned two kinds of cable tension keep state of equilibrium, and, the friction of operation cable, the operation resistance that detent mechanism produced of variable speed operation tool, no matter variable speed operation member that position of being arranged in operating area all equates or cause about equally, no matter be when switching to that gear, all can simultaneously utilize return spring to assist and be produced as to overcome to adjust and carry out variable speed operation with the required operation strength of the resistance that spring produced.And required artificial operation strength is can be tending towards equating or about equally when carrying out variable speed operation.
When wherein another direction of desiring towards acceleration or deceleration side is carried out speed change, and with the variable speed operation member towards drawing in the operation of this side of operation cable, then change that chaining bar member moves and the action of changing the chaining bar be scheduled to because the operation pull operation that cable produced can make.When carrying out this variable speed operation, though be must be to overcome: act on change chaining bar member change chaining bar resistance, the elastic force of return spring, the friction force of operation cable, the mode of the resistance of the detent mechanism of variable speed operation tool etc. is operated the variable speed operation member, but if be to change the words that the resistance of chaining bar does not act on the state of change-speed box as yet, no matter the variable speed operation member is where to be positioned at its operating area, above-mentioned two kinds of cable tension all keep the event of balance, and, be among the operating area of whole variable speed operation member, the friction force of operation cable, the operation resistance that the detent mechanism of variable speed operation tool produced etc. is all and equates or about equally event, no matter be to switch to that gear, all can simultaneously utilize auxiliary assist to be produced as with spring overcome the required operation strength of resistance that return spring produces and carry out variable speed operation.And required artificial operation strength is can be tending towards equating or about equally when carrying out variable speed operation.
When implementing transmission system of the present invention, by return spring and auxiliary can variation similarly with two kinds of cable tension that spring produced along with the operation of variable speed operation member, though all be tending towards in the operating area that also can be arranged to make these two kinds of cable tension be whole variable speed operation member equating if make: no matter the operational ton of variable speed operation member is why, all make following return spring and above-mentioned auxiliary with spring add all in the operation cable each tension force (CT1, CT2) all be tending towards certain or be close to certain words, even the link condition between the operation cable of change-speed box and speed-changing operation device produces some variations, by cable tension that return spring produced and by auxiliary all still be the state that maintenance is balance with the cable tension that spring produced.That is, if be made into: can make back and advise spring and assist cable tension to change on the one hand along with the operation of variable speed operation member with spring produced, simultaneously another aspect keeps under the situation of state of equilibrium, when for example having taken place: the phenomenon that the operation cable slack is elongated and so on and when causing the binding of change-speed box and speed-changing operation device to take place to be offset situation, residing shift position of change-speed box and the residing operating position of variable speed operation member just become and can't come in correspondence with each other according to original design-calculated mode.In other words, the situation of the situation of the distortion of return spring and auxiliary distortion with spring can't be come in correspondence with each other according to original design-calculated mode, and the cable tension that return spring produced and assist to become with the cable tension that spring produced and can't keep balance again.Thus, just must adjust connection relationship corresponding to the shift position of change-speed box and the operating position of variable speed operation member according to original design-calculated mode, so that these two kinds of cable tension that spring produced keep balance mutually, therefore become cumbersome.
But, if be made into: no matter the operational ton of variable speed operation member why, all make each tension force (CT1, CT2) be tending towards certain or be close to certain words, even change because some skews take place the binding situation of change-speed box and speed-changing operation device, and cause the deformation extent of return spring and the corresponding relation between the two of auxiliary deformation extent with spring and the corresponding relation of upright stone tablet that some changes are arranged, the cable tension that return spring produced and auxiliary still can not change with the corresponding relation between the cable tension that spring produced, and still can keep the equilibrium relation of two kinds of cable tension that spring produced.
That is, when towards speedup or deceleration side wherein a side carries out speed change the time, even when switching to any one speed change gear, also can be to utilize on the one hand return spring to make to assist not reconstruct resistance with spring, carry out the event of variable speed operation on the one hand, only need to overcome the operation cable during operation, the resistance of detent mechanism gets final product, therefore can utilize very slim and graceful and keep certain or be close to certain operation strength just can operate this variable speed operation member make its be unlikely move excessive, perhaps operation is moved not enough, therefore, can quite positively operate, and very accurately speed change arrives desired speed.Then, when carry out towards speedup or deceleration side wherein another carries out speed change the time, even when switching to any one speed change gear, also can be to utilize on the one hand to assist to make return spring not reconstruct resistance with spring, carry out the event of variable speed operation on the one hand, only need to overcome the resistance when changing the chaining bar during operation, the friction of cable tension, the resistance of detent mechanism gets final product, therefore can utilize very slim and graceful and keep certain or be close to certain operation strength just can operate this variable speed operation member make its be unlikely move excessive, perhaps operation is moved not enough, therefore, can quite positively operate, and very accurately speed change arrives desired speed.
That is to say, even the adjustment of the connection relationship between change-speed box and the speed-changing operation device needn't be too accurate, even perhaps because the operation cable takes place some lax elongated, cause script some changes to take place corresponding to the operating position of the variable speed operation member of the shift position of change-speed box, still can keep state of equilibrium between two cable tension that spring produced, therefore can maintain what is called: " can necessarily or be close to certain operation strength and carry out speed change." the ideal operation state.
For implementing transmission system of the present invention, about being used for the variable speed operation member is installed to connect mechanism on the car body, also can adopt: make the variable speed operation member become the connect mechanism of parallel mobile four link type with respect to car body, but, adopt the 2nd above-mentioned connect mechanism, contain the base component that is supported on bicycle body and in order to above-mentioned variable speed operation member is attached to a shaft component on the above-mentioned base component in the mode that can swing; Above-mentionedly auxiliaryly be: be linked to above-mentioned base component with the one end, be linked to the torsional mode coil spring of above-mentioned variable speed operation member with its other end with spring; Above-mentioned variable speed operation member is provided with can be kept the be in line constituted mode of connecting part of shape of operation cable tension, can have following advantage.
That is speed-changing operation device can be tending towards exquisite miniaturization.For example: if the variable speed operation member is attached to car body via four-bar linkage in removable mode freely, and outer end and the inner end that will operate cable are attached to the stationary links of four-bar linkage and the swing connecting bar of four-bar linkage respectively, and the move operation that can utilize the variable speed operation member is operated this operation cable, whole variable speed operation member can move towards the direction away from car body and little by little allow hand relatively be difficult for arriving at, and perhaps whole speed-changing operation device can be tending towards relatively maximizing.But, if the variable speed operation structure manufacture is become oscillating type, simultaneously will operate cable again and be attached to the variable speed operation tool in the mode that can be manipulated into linearity, for example: grip at hand under the state of Handlebar of bicycle, just can operate this variable speed operation member as long as thrust out one's fingers, and whole speed-changing operation device also is tending towards the exquisite miniaturization of comparison.
Therefore, the not only variable speed operation member easy operating that becomes, and the more exquisite miniaturization that becomes so, can be installed on Handlebar of bicycle and can not take too big space, and carry out easily again variable speed operation so, can produce the higher bicycle of commodity value.
Below, with reference to the description of drawings embodiments of the invention:
Fig. 1 is the instruction diagram of serviceability of Rear Derailleur of the speed change handle of expression the 1st embodiment of the present invention.
Fig. 2 be with same expression variable speed operation member and the change-speed box of Fig. 1 be the instruction diagram that is positioned at the dead slow side.
Fig. 3 is the single-piece lateral plan of the Rear Derailleur of Fig. 1, Fig. 2.
Fig. 4 is the speed-changing operation device single-piece planar view of Fig. 1, Fig. 2.
Fig. 5 is the cross sectional drawing of the speed-changing operation device of Fig. 4.
Fig. 6 is the cross sectional drawing of speed change handle installation portion of the speed-changing operation device of Fig. 4.
Fig. 7 is the instruction diagram of shift tower of the speed-changing operation device of Fig. 4.
Fig. 8 is the auxiliary instruction diagram with the cable tension that spring and return spring produced among the present invention.
Fig. 9 is the auxiliary instruction diagram of using the shape of spring among the present invention.
Figure 10 is the auxiliary instruction diagram with the cable tension that spring produced of the variable speed operation member among the present invention, CT1-1st, the cable tension when carrying out the speedup operation from 1 P PARK Position P side toward 7 P PARK Position P sides; CT1-the 2nd, the cable tension when carrying out the speedup operation from 7 P PARK Position P sides toward 1 P PARK Position P side.
Figure 11 is the skeleton diagram of the speed-changing operation device of other embodiment of the present invention.
Figure 12 is aimed at the auxiliary instruction diagram with the cable tension that spring and return spring produced in the device of Figure 11.
Figure 13 is the chart shown in the cable tension among another other embodiment changes.
Figure 14 and Figure 15 be show in the past the variable speed operation member and the chart of the variation of the cable tension in the change-speed box.
As depicted in figs. 1 and 2, be by: have the guiding pulley 11 bicycle use Rear Derailleur 10; And the speed-changing operation device 20 with a speed change handle 21 constitutes derailleur.This bicycle transmission is the trailing wheel crotch 1 that bicycle use Rear Derailleur 10 is installed on bicycle body in mode shown in Figure 3, speed-changing operation device 20 is installed on handgrip 2 in mode shown in Figure 4, and utilize the operation cable 3 that is constituted by external cable 3a and internal cable 3b to be linked bicycle use Rear Derailleur 10 and speed-changing operation device 20, utilize speed change handle 21 to operate bicycle use Rear Derailleur 10 via operation cable 3, guiding pulley 11 can change chain 4 and be suspended to 7 back-geared one of them gears.Its detailed construction is as follows:
That is, as Fig. 1, Fig. 2 and shown in Figure 3, be to utilize the swing connecting bar 16,17 of pair of right and left to link: utilize the mode of bolt binding to be attached to the protrusions 15 that trailing wheel is used crotch 1 via chain guide for use 13 with to link board 15a.And with supporter 14, swing connecting bar 16,17 and the protrusions 15 common parallel four-bar linkage R1 that form.Be from pair of right and left swing connecting bar 16, the swing connecting bar 16 on the right side among 17 is extended between the operation arm 16a and supporter 14 that sets out toward swing connecting bar 17 directions in left side, a return spring RS who is become by the pull coil spring is installed, the part that can rotate in the periphery of axle center B that connects to that is the binding board 15a of protrusions 15 is equipped with the 1st a tension spring S1 who is become by the torsional mode coil spring in being, be supporter 14 chain guide for use 13 connect to that the periphery that can be axle center P rotates partly be in the 2nd a tension spring S2 who is become by the torsional mode coil spring is housed.On the protrusions 15, it is the outer retainer 18 that has in order to the external cable 3a of support operation cable 3, and has the internal cable connecting part that the internal cable 3b locking that can utilize cable check screw 19 will operate cable 3 is attached to the structure of aforesaid operations arm 16a, by this to constitute above-mentioned bicycle use Rear Derailleur 10.
In other words, guiding pulley 11 is to utilize parallel four-bar linkage R1 and be installed in the 1a of erection of transmission portion that extends out with the crotch tail end of crotch 1 from trailing wheel, and can move back and forth towards the car body transverse direction.Therefore, guiding pulley 11 is to be: 1 P PARK Position P of dead slow in order to the low speed gear that chain 4 is hung on the maximum outside diameter that is positioned at body inner side in 7 backgears most shown in Figure 2, and in order between the most high-revolving 7 P PARK Position Ps that chain 4 are hung on high speed gear in the outermost minimum outer diameter of car body shown in Figure 1, transverse direction towards car body moves back and forth, be according to the pulling force of internal cable 3a and from 7 back-geared little outside diameters toward big outside diameter, be carried out move operation, and carry out chain is changed the work that is suspended to low speed side from high-speed side, and the elastic recovery strength that can utilize return spring RS is from 7 back-geared big outside diameters toward little outside diameter, be carried out move operation, chain changed the work that is suspended to high-speed side from low speed side and carry out.The 1st tension spring S1 wherein one distolateral be to be limited to link board 15a, its another distolateral be to be limited to protrusions 15, to exert pressure for protrusions 15 towards swinging mode BF with the periphery of the past axle center B of crotch 1 with respect to trailing wheel, by this, can tension force be added all via guiding pulley 11 and tension roller 12 in chain 4.The 2nd tension spring S2 wherein one distolateral be to be limited to supporter 14, another is distolateral to be to be limited to chain guide for use 13, to exert pressure for chain guide for use 13 towards periphery swaying direction PF with respect to the past axle center P of supporter 14, by this, can tension force be added all via guiding pulley 11 and tension roller 12 in chain 4.
As Fig. 4～shown in Figure 6, be to be made into: screw 23b utilize being installed the 22a of wrist strap portion locking being installed near the grip part of handlebar 2 with the handle 5 of will brake and being installed on the handle carriage 22 of structure of handlebar 2, is to be installed with: be made into so that screw 23 is locked prop up shaft component 24 and utilize this shaft component 24 to be locked at the pawl retainer 25 of handle carriage 22 to be installed.The mode that above-mentioned speed change handle 21 is rotated with the periphery of the axle center 24a that can be shaft component 24 is supported in above-mentioned shaft component 24, and will be made in order to the nappe 26 of the base portion 21a that coats speed change handle 21 etc. in castellated shaft engaging mode and be limited to the end of a shaft component 24 and can't rotate, and utilize and screw 27 is installed is fixed.The base portion 21a of speed change handle 21 is equipped with an adjustment spring AS who is become by the torsional mode coil spring in being, above-mentioned nappe 26 is to be provided with an external bracing device 28 in order to the external cable 3a of support operation cable 3, and being provided with one is made into: the internal cable 3b that will operate cable 3 by shelves are only supporting cable joint 3b is linked to the cable connecting part 21b of above-mentioned speed change handle 21, by this, constitute above-mentioned speed-changing operation device 20.
That is, speed change handle 21 is with a shaft component 24 and the connect mechanism of handle carriage 22 as installation usefulness, and be installed on handlebar 2, and utilize and be located at any one of pulling operating portion 21A, the 21B from two fingers of the outstanding part of the nappe 26 of speed change handle 21 and operate in the mode of the periphery reciprocally swinging that can be axle center 24a.That is, if with speed change handle 21 when swing mode D shown in Figure 5 operates, be to abut to thumb to refer to pull operating portion 21A, only using this to refer to pull operating portion 21A just can be to operate in the whole stroke, when with speed change handle 2 when swing mode U shown in Figure 5 operates, be to abut to forefinger to refer to pull operating portion 21B, only use this to refer to pull operating portion 21B and just can be to operate in the whole stroke.In other words, speed change handle 21 be can from: be positioned at the distolateral location indentations of outermost among 7 location indentations of the location division 21c that is located at speed change handle 21 and be installed on dead slow (a grade) position that the service portion 29a of the positioning pawl 29 of the plastic cement system on the pawl retainer 25 is aligned with each other and move to the service portion 29 that is positioned at another distolateral location indentations and above-mentioned positioning pawl 29 among above-mentioned 7 location indentations and protect (seven grades) position the most at a high speed that aligns.Along with the shift action of the past low speed side of speed change handle 21, cable connecting part 21b just carries out operation that internal cable 3b is pulled out from external cable 3a; Shift action along with the past high-speed side of speed change handle 21, cable connecting part 21b just carries out sending the operation of returning in the external cable 3a with internal cable 3b, and this speed change handle 21 is to form can will to carry out stretched operation to be in line shape from the internal cable 3b that external cable 3a pulled out and be unlikely this internal cable 3b that pulls out is curled.That is, along with moving of speed change handle 21, though motion track that cable support portion 21b is drawn and non-rectilinear, but circular arc, but the internal cable 3b that is drawn from external cable 3a is the amount of pulling out number no matter, is all keeping to be drawn into roughly linearity but not circular-arc always, therefore, it is referred to as to be drawn into the operation of linearity.Auxiliary with spring AS one distolateral be to be linked to handle carriage 22 in order to the 25a of mount pad portion that is installed to handle carriage 22 on the pawl retainer 25 by being limited to, another is distolateral then to be by the base portion 21a that is engaged to speed change handle 21 speed change handle 21 to be exerted pressure towards above-mentioned 1 P PARK Position P.That is to say, with speed change handle 21 towards be opposite pressuring direction by the return spring RS of change-speed box 10 via operation cable 3 direction of being exerted pressure.
In speed-changing operation device 20, as shown in Figure 8, when speed change handle 21 moves to 7 P PARK Position Ps from 1 P PARK Position P, can be that the arc track T at center moves along swinging center 24a with speed change handle 21 as the cable connecting part 21b of the point of contact of internal cable 3b.Be that this track T goes up because the auxiliary non-productive operation strength AF that produces with spring AS in order to swinging operation speed change handle 21, because this non-productive operation strength AF and for partly being produced cable tension CT1 by the internal cable 3b of cable connecting part 21b and outer retainer 28 clampings.This cable tension CT1 is a basis with respect to the tension force ratio of non-productive operation power AF: internal cable 3b and change by the leaning angle A between the straight line L of swinging center 24a and cable connecting part 21b, cooperate the operation of speed change handle 21, cable connecting part 21b can move, even because the variation of auxiliary torsional capacity with spring AS makes non-productive operation power AF also change, as long as suitably change the words of above-mentioned leaning angle A, cable tension CT1 just is unlikely change, even perhaps change to some extent, also be unlikely the same bigger change that has with non-productive operation power AF.And above-mentioned leaning angle A is a basis: the setting of the position relation of the cable connecting part 21b of speed change handle 21 and the outer retainer 28 of nappe 26 decides event, as long as the words that cable connecting part 21b and outer retainer 28 configuration settings are concerned in suitable position, by the auxiliary cable tension CT1 that is resulted from internal cable 3b with spring AS, be from any one velocity location of 1 P PARK Position P to 7 P PARK Position P, in other words, no matter speed change handle 21 is arranged in any position of operating area, and it is certain that cable tension CT1 roughly is tending towards.Therefore, be used as the auxiliary spring AS that uses if adopt torsional mode coil spring shown in Figure 9, and cable connecting part 21b is become the words of position relation as shown in Figure 8 with outer retainer 28 configuration settings, just can produce roughly certain cable tension CT1-1 as shown in figure 10, cable tension CT1-2.Among Figure 10, abscissa is from left to right represented the shift position from 1 speed to 7 speed, and ordinate is represented cable tension CT1.
That is, cooperate present embodiment to introduce the words of concrete numerical value, be with: when speed change handle 21 is operated 1 P PARK Position P, be the position that is positioned at apart from the about 25.9mm of distance D 1=of the swinging center 24a of speed change handle 21 across the axle center of the internal cable 3b between outer retainer 28 and the cable connector 21b; When speed change handle 21 is operated 7 P PARK Position Ps, be to be positioned at apart from the mode of the position of the about 29mm of distance D 7=of the swinging center 24a of speed change handle 21 to come configuration settings cable connector 21b and outer retainer 28 across the axle center of the internal cable 3b between outer retainer 28 and the cable connector 21b.And, if make its mode that does not act on speed change handle 21 come one side to operate speed change handle 21 to take positioning pawl 29 grades apart, one side utilizes outer retainer 28 to measure the tension force that betides internal cable 3b, is cable tension CT1-1, the CT1-2 that can record as shown in figure 10.That is, cable tension CT1-the 1st, the measured value of the cable tension when speed change handle 21 is operated 7 P PARK Position Ps from 1 P PARK Position P speedup is: 3.35～3.4kgf.Cable tension CT1-the 2nd is when the measured value of the cable tension from 7 P PARK Position P deceleration-operation to 1 P PARK Position P time the with speed change handle 21 is: 2.72～2.68kgf.In other words, when speed change handle 21 is that any operating position in its whole operation zone is operated, the auxiliary tension force CT1 generation that adds all 2.68～3.4kgf in internal cable 3b with spring AS can be arranged all.Herein, the difference between the cable tension (CT1-2) of the cable tension (CT1-1) of speed change handle 21 being carried out speedup when operation when carrying out deceleration-operation is caused by rubbing etc.
In Rear Derailleur 10, be as shown in Figure 8, when guiding pulley 11 when 1 P PARK Position P moves to the scope of 7 P PARK Position Ps, the cable check screw 19 that is taken as the point of contact of internal cable 3b can be that the arc track T at center moves along the connecting pin axle center X with the binding center of being used as right swing connecting bar 16 and protrusions 15.Be on this track T, because of the cause of return spring RS is arranged, be to produce to have to make right swing connecting bar 16 carry out the operating effort RF that reverses of swinging operation, because the cause of this operating effort RF that reverses is that just the internal cable 3b that is sandwiched between point of contact 19 and the outer retainer 18 partly produces cable tension CT2.This cable tension CT2 is a basis with respect to the ratio of the tension value of the operating effort RF that reverses: internal cable 3b change with respect to the leaning angle A of the internal cable 3b of the straight line by connecting pin axle center X and point of contact 19 so, even because along with the mobile of point of contact 19 causes the length change of return spring RS and cause the operating effort RF that reverses also to change, as long as suitably change the words of above-mentioned leaning angle A, cable tension CT2 just can not change, can be not big just like that as the operating effort RF that reverses even perhaps change to some extent yet.And, above-mentioned leaning angle A is that the setting with the position relation of the outer retainer 18 of protrusions 15 determines according to the cable point of contact 19 of above-mentioned right swing connecting bar 16, therefore, as long as suitably set the words of the position relation of cable point of contact 19 and outer retainer 18, suppose that being in chain 4 is not hung on guiding pulley 11 and tension roller 12 as yet, and the resistance that chain 4 is sent when changing the chaining bar does not act under the state of guiding pulley 11 as yet, resulted from the tension force CT2 of internal cable 3b by return spring RS, no matter being in any one velocity location in 1 P PARK Position P to 7 P PARK Position P, all is necessarily or roughly to be tending towards certain.In other words, as long as by with the cable point of contact 19 of right swing connecting bar 16 and outer retainer 18 words of configuration settings suitably, sent by chain 4 when being chain 4 not to be hung on guiding pulley 11 and tension roller 12 as yet change the chaining bar time resistance do not act on as yet under the state of guiding pulley 11, how the position no matter the cable tension CT2 that is betided internal cable 3b by return spring RS guides pulley 11 all is the value that becomes between 2.68～3.4kgf.
Therefore, suppose that Rear Derailleur 10 and speed-changing operation device 20 just utilize operation cable 3 to be linked and be not installed on car body as yet, even perhaps be installed on car body, but also chain 4 is not hung on guiding pulley 11 and tension roller 12 as yet and by chain 4 sent change the chaining bar time the resistance state of not having an effect as yet under, and under the state that positioning pawl 9 does not also act on, operate the words of speed change handle 21, no matter speed change handle 21 is those velocity location that are arranged in 1 P PARK Position P to 7 P PARK Position P, return spring RS add all cable tension CT2 in internal cable 3b all can with added the relation that all cable tension CT1 in interior cable 3b remain in balance by auxiliary with spring AS.
That is, when present dynasty's deceleration side is carried out speed change, be towards Fig. 1 and swaying direction D operation shown in Figure 5 with speed change handle 21.So speed change handle 21 will simultaneously make return spring RS generation elastic deformation simultaneously make guiding pulley 11 carry out move operation with tension roller 12 toward body inner side.By this, guiding pulley 11 just changes chain 4 and is suspended to larger diameter side from the smaller diameter side among the backgear, and switches to the low speed kerria from gear.At this moment, no matter be any one the speed change gear that switches in 1 grade to 7 grades, return spring RS add all in internal cable 3b cable tension CT2 and auxiliaryly add all cable tension CT1 with spring AS and keep mutual state of equilibrium, be to assist the operation strength of assisting generation required intensity when making return spring RS elastic deformation with spring AS by this.Therefore, as long as requiredly add all manual operation strength to speed change handle 21 and just overcome: act on the resistance that changes the chaining bar of guiding pulley 11, the external cable 3a of operation cable 3 and the friction force of internal cable 3b, the operation resistance of positioning pawl 29, just can operate speed change handle 21.
On the other hand, desiring when the speedup side is carried out speed change, is towards Fig. 2 and swaying direction U operation shown in Figure 5 with speed change handle 21.So, speed change handle 21 can elongate out with internal cable 3b, because the relation that is drawn out of cable at this moment, return spring RS can carry out the elastic recovery start, carries out move operation the changing sides the bar resistance of this two pulley 11,12 towards the car body outside with tension roller 12 antagonisms and will guide pulley 11.By this, guiding pulley 11 changes extension with chain 4 from back-geared larger diameter side toward smaller diameter side, and switches to gear from low gear.At this moment, no matter be any one the speed change gear that switches in 1 grade to 7 grades, return spring RS add all in internal cable 3b cable tension CT2 and auxiliaryly add all cable tension CT1 with spring AS and keep mutual state of equilibrium, be assist generation in order to make the operation strength of assisting intensity required when using spring AS elastic deformation by this return spring RS.Therefore, as long as requiredly add all manual operation strength to speed change handle 21 and just overcome: the external cable 3a of operation cable 3 and the friction force of internal cable 3b, the operation resistance of positioning pawl 29, just can operate speed change handle 21.
As shown in Figure 7, speed change handle 21 from nappe 26 expose and towards the car body rear to outer circumferential surface section 21d possess to have: the pointer sign 31 of placed arrow type, be to be to indicate to have 7 digital speed change gears to indicate 32 with the corresponding 26a of wall portion of above-mentioned outer circumferential surface section 21d on the nappe 26 simultaneously towards the car body rear ..., utilize above-mentioned outer circumferential surface section 21d and the 26a of wall portion to constitute in order to show the shift tower 30 of speed change gear.
That is, as long as the words of swinging operation speed change handle 21, outer circumferential surface section 21d is moving with respect to the 26a of wall portion, when speed change handle 21 places 1 grade to 7 grades desired operating position, pointer sign 31 just indicates 7 speed change gears and indicates 32 ... in with the corresponding person of the operating position of speed change handle 21, by knowing that 31 indications of pointer sign are that speed change gear indicates 32, be that speed change gear that switches in the 1st grade to the 7th grade and can judge.And, can utilize speed change handle 21 as the pointer member respectively, utilize nappe 26 as sign dish member, the simplification of seeking to construct on the one hand is made into shift tower on the one hand.
Speed-changing operation device as for the form that is installed in handlebar, except being made into: it is supported in handle carriage 22 and is installed on the constituted mode of handlebar 2 with brake handle 5, also can be made into: have the special-purpose installation component different, be installed on the constituted mode of handlebar 2 respectively separately individually with brake handle 5 with handle carriage 22.Therefore, handle carriage 22 addresses are base component.Other embodiment
About speed-changing operation device, even adopt the speed-changing operation device 40 of constituted mode as shown in figure 11, also can be made into: allow assist add all cable tension CT1 in internal cable 3b with spring AS, no matter the deflection of auxiliary usefulness spring AS how, all can be tending towards certain or be tending towards roughly certain.
That is, to make the base component 41 that can be fixed in handlebar 2 and have the speed change handle 42 of operating arm 42a, utilize a pair of swing connecting bar 43,44 to be linked, and with base component 41 and swing connecting bar 43,44 and speed change handle 42 formation parallel four-bar linkage R2.Between the arm 44a and base component 41 that is to extend out from the wherein side's of a pair of swing connecting bar 43,44 swing connecting bar 44, be the return spring RS that is installed with to be become by the pull coil spring, be that speed change handle 42 is the outer retainer 18 that have in order to the external cable 3a of support operation cable 3, be that above-mentioned arm 44a then has: can utilize cable check screw 19 to link the cable connecting part of the internal cable 3b that operates cable 3.
The situation of this link-type speed-changing operation device 40 is as shown in figure 12, is to move along the arc track T that is the center with the connecting pin axle center X as the binding center of swing connecting bar 44 and installation material member 41 as the cable check screw 19 at the binding center of internal cable 3b.Be on this track T, suppose because auxiliary cause with spring AS is arranged, but and the words of the non-productive operation power AF of this swing connecting bar 44 of swinging operation have been produced, because of the cause of this non-productive operation power AF, be that from cable point of contact 19 to outer retainer the part of the internal cable 3b till 18 can produce cable tension CT1.This cable tension CT1 is a basis with respect to the ratio of the tension value of non-productive operation power AF: internal cable 3b change with respect to the leaning angle A of the straight line L by connecting pin axle center X and cable point of contact 19 so, even cooperate cable point of contact 19 mobile cause auxiliary with spring AS the length change and cause non-productive operation power AF also to change, but as long as suitably change the words of above-mentioned leaning angle A, cable tension CT1 just can not change, even perhaps change the big variation of the degree that yet is unlikely non-productive operation power AF to some extent.And, above-mentioned leaning angle A depends on the cable point of contact 19 of swing connecting bar 44 and the setting of the position relation of the outer retainer 18 of speed change handle 42, therefore, as long as by the position relation of suitably setting cable support portion 44b and outer retainer 19, no matter how the operating position of speed change handle 42 changes, and auxiliary cable tension CT1 with the life of section of spring AS institute keeps necessarily or be roughly certain.And then, the situation of this speed-changing operation device, be to be made into and the event of the parallel four-bar linkage of transmission side same mechanism, as long as specifications such as the size formation of parallel four-bar linkage R2 is identical with the specifications such as size of the parallel four-bar linkage R1 of change-speed box 10, can be easy to set for: allow the auxiliary tension force CT1 that adds all internal cable 3b with spring AS that is speed-changing operation device 40 places become identical and mutual balance with the tension force CT2 that the return spring RS at change-speed box 10 places adds all internal cable 3b.In other words, identical as long as specifications such as size that will be each other are made into, and then the lifting force of spring that will be each other is made into substantially the samely, cable tension CT1 can become identical and mutual balance with CT2.
The present invention also goes for the transmission system that Front Derailleur is used except the transmission system that Rear Derailleur is used.Therefore, be that the chaining bar that changes with above-mentioned guiding pulley 11 and Front Derailleur is generically and collectively referred to as with guide plate: change chaining bar member 11, and above-mentioned parallel four-bar linkage R1 is generically and collectively referred to as in order to will change the connect mechanism R1 that chaining bar member 11 is installed to bicycle body.
Except the form that adopts above-mentioned speed change handle 21,42, the present invention also can be fit to adopt: be made into rotatable and be embedded in handlebar freely forming the handle portion of handlebar, and constitute speed-changing operation device via the operating body that the operation cable is operated the rotary type of change-speed box.Therefore, be that these speed change handles, rotary type operating body are generically and collectively referred to as variable speed operation member 21,42.
Again, the present invention is except providing: be made into and allow return spring will change chaining bar member toward the transmission system of the mode of low speed side operation, also provide: be made into and allow return spring will change the transmission system of chaining bar member toward the mode of high-speed side operation.Therefore, be that return spring is called: in order to will change chaining bar member toward the spring of folk prescription to move operation.
As shown in the Examples, the present invention is made into except may be implemented in: make return spring and auxiliary with cable tension that spring produced no matter the distortion of two springs how all can keep necessarily or roughly necessarily to keep the mode of mutual balance; The present invention also can be implemented on as shown in figure 13, and among Figure 13, abscissa is from left to right represented the shift position of 1 speed to 7 speed, and ordinate is represented cable tension.Along with the distortion of two springs allows the value of cable tension CT1, CT2 also change, but allow the constituted mode of two cable tension CT1, the mutual balance of CT2 simultaneously again.
Claims (3)
1, a kind of bicycle transmission comprises:
Have change chaining bar member (11), in order to this is changed chaining bar member (11) with the 1st connect mechanism (R1) that can reciprocatingly be installed on bicycle body and in order to the above-mentioned bicycle gear device (10) that changes the return spring (RS) that chaining bar member (11) exerts pressure towards the above-mentioned single direction that moves back and forth; With
Has variable speed operation member (21,42) and in order to this variable speed operation member (21,42) can reciprocatingly be installed on the 2nd connect mechanism (22 of bicycle body, 24, R2), have the speed-changing operation device (20,40) of operating above-mentioned bicycle gear device (10) via operation cable (3) simultaneously, it is characterized by:
Above-mentioned speed-changing operation device (20,40) is provided with: in order to the application of force direction opposite sense of above-mentioned variable speed operation member (21,42) court with above-mentioned return spring (RS), make the auxiliary with spring (AS) of the mobile pressuring direction of above-mentioned change-speed box (10); And
Above-mentioned variable speed operation member (21 no matter, 42) operational ton how, all makes the roughly the same above-mentioned return spring (RS) and the above-mentioned auxiliary usefulness spring (AS) installed of tension force (CT2) and above-mentioned auxiliary tension force (CT1) with spring (AS) aforesaid operations cable (3) that put on of above-mentioned return spring (RS) aforesaid operations cable (3) that put on.
2, bicycle transmission as claimed in claim 1, it is characterized in that: above-mentioned return spring (RS) and above-mentioned auxiliary each tension force (CT1 with spring (AS) the aforesaid operations cable that is added on (3), CT2), above-mentioned variable speed operation member (21 no matter, 42) operational ton how, is all necessarily or roughly certain.
3, bicycle transmission as claimed in claim 1, it is characterized in that: above-mentioned the 2nd connect mechanism (22,24) comprising: be supported on bicycle body base component and in order to above-mentioned variable speed operation member (21) to be attached to shaft component of above-mentioned base component swingably;
Above-mentioned auxiliary be that the one end is linked to above-mentioned base component with spring (AS), the other end is linked to the torsional mode coil spring of above-mentioned variable speed operation member (21); Above-mentioned variable speed operation member (21) has the connecting part (21b) that the tension of operation cable (3) can be held in linearity.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31623394A JP3445853B2 (en) | 1994-12-20 | 1994-12-20 | Bicycle transmission |
| JP316233/1994 | 1994-12-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1133806A true CN1133806A (en) | 1996-10-23 |
Family
ID=18074802
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95120450 Pending CN1133806A (en) | 1994-12-20 | 1995-12-20 | Multi-speed gear for bicycle |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP3445853B2 (en) |
| CN (1) | CN1133806A (en) |
| TW (1) | TW291467B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1931661B (en) * | 2005-09-14 | 2010-12-08 | 株式会社岛野 | Bicycle shift operating device |
| US8007383B2 (en) | 2006-10-24 | 2011-08-30 | Shimano, Inc. | Low profile rear derailleur |
| US8012052B2 (en) | 2006-02-28 | 2011-09-06 | Shimano, Inc. | Low profile rear derailleur with cable guide |
| CN102398665A (en) * | 2010-09-14 | 2012-04-04 | 林昌慧 | Sleeve shaft-type rear speed changer |
| US8277346B2 (en) | 2006-02-28 | 2012-10-02 | Shimano, Inc. | Low profile rear derailleur |
| CN104691653A (en) * | 2013-12-06 | 2015-06-10 | 雅马哈发动机株式会社 | Cable error volume absorption mechanism |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100983985B1 (en) * | 2010-04-02 | 2010-09-27 | 송윤이 | Transmission for bicycle |
| JP6399713B1 (en) | 2017-07-05 | 2018-10-03 | 株式会社グロータック | Bicycle shift operation device and shift position notification device |
| JP6399723B1 (en) * | 2018-02-21 | 2018-10-03 | 株式会社グロータック | Bicycle shifting operation device |
-
1994
- 1994-12-20 JP JP31623394A patent/JP3445853B2/en not_active Expired - Fee Related
-
1995
- 1995-01-28 TW TW84100858A patent/TW291467B/zh active
- 1995-12-20 CN CN 95120450 patent/CN1133806A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1931661B (en) * | 2005-09-14 | 2010-12-08 | 株式会社岛野 | Bicycle shift operating device |
| US8012052B2 (en) | 2006-02-28 | 2011-09-06 | Shimano, Inc. | Low profile rear derailleur with cable guide |
| US8277346B2 (en) | 2006-02-28 | 2012-10-02 | Shimano, Inc. | Low profile rear derailleur |
| US8007383B2 (en) | 2006-10-24 | 2011-08-30 | Shimano, Inc. | Low profile rear derailleur |
| US8025598B2 (en) | 2006-10-24 | 2011-09-27 | Shimano, Inc. | Low profile rear derailleur with a chain receiving space |
| CN101168379B (en) * | 2006-10-24 | 2012-07-11 | 株式会社岛野 | Low profile rear derailleur with a chain receiving space |
| CN102398665A (en) * | 2010-09-14 | 2012-04-04 | 林昌慧 | Sleeve shaft-type rear speed changer |
| CN104691653A (en) * | 2013-12-06 | 2015-06-10 | 雅马哈发动机株式会社 | Cable error volume absorption mechanism |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3445853B2 (en) | 2003-09-08 |
| TW291467B (en) | 1996-11-21 |
| JPH08169387A (en) | 1996-07-02 |
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