Embodiment
Below, with reference to accompanying drawing, an embodiment of the invention are described.Fig. 3 is the outward appearance side view that comprises the pedal-type two-wheel motorcycle of the stepless speed variator relevant with an embodiment of the invention.In with figure, the Vehicular body front 2 of pedal-type two-wheel motorcycle 1 and rear vehicle 3 link by low base plate 4, and the framework of car body is by managing 6 and constitute from managing 6 persons in charge 7 that extend to the back upper place down down.Configuration seat 8 above the person in charge 7.At seat 8 be responsible between 7, the containing box of taking in the helmet etc. and fuel tank (all not shown go out) are set.Seat 8 is used for the lid of containing box.
The above-mentioned front end of pipe 6 down is bonded on the head pipe 5 that is arranged on the Vehicular body front 2.On head pipe 5, ground axle suspension free to rotate has front fork 12.Prolongation is equipped with handle 11 above front fork 12, and axle is supported with front-wheel 13 in the lower end of front fork 12.The top of handle 11 is covered by the handle cover 33 that is used for instrument panel.
At the subordinate's end of holding up of being responsible for 7 support 15 is set, by linking parts 16, links suspension bracket 18 on support 15, swing bodies 17 is joltily supported by freedom.The rear portion of swing bodies 17 and the person in charge's 7 rear portion links by the rear shock absorber 22 with buffer unit.In the front portion of swing bodies 17, carry single cylinder 4 cycle engines 200.At the rear of motor 200, V-shape belt formula stepless speed variator 35 and retarder 38 are set.Output shaft (aftermentioned) at retarder 38 is gone up in conjunction with trailing wheel 21.That is, the output of motor 200 is delivered to trailing wheel 21 by stepless speed variator 35 and retarder 38.
In the front portion of swing bodies 17, connect cylinder cap 32 extended suction tude 23 from motor 200.The air-strainer 25 that on suction tude 23, sets Carburetor 24 and link with Carburetor 24.On the suspension bracket 18 on the crankcase 31 that is arranged at swing bodies 17, be supported with the master bracket 26 of parking usefulness.On the foot pedal starting axle (キ Star Network axle) 27 outstanding from the case cover (outer cup) 36 of speed changer 35, fixing foot-operated actuating arm (キ Star Network ア one system) 28 is provided with kick pedal (キ Star Network ペ ダ Le) 29 at the front end of foot pedal starting arm 28.
Fig. 1 is the front cross-sectional view of stepless speed variator, and Fig. 2 is identical rear portion sectional view.In Fig. 1 and Fig. 2, stepless speed variator forms profile by transmission case 40, rotating box cover 401, outer cup 36, speed change with drive portion cover (calling [final controlling element cover] in the following text) 58, and this transmission case 40 is that the part by the crankcase 31 of motor 200 constitutes; This transmission case cover 401 covers transmission case 40 from the car body left surface; This outer cup 36 further covers transmission case cover 401 from the outside; This speed change is installed in the front portion (the direction of travel front portion of vehicle) of transmission case cover 401 with drive portion cover 58.
In Fig. 1, the bent axle 41 of motor 200 is by being arranged on bearing 42 on the transmission case 40 and not shown another bearings that goes out.The part 43 that is projected into the bent axle 41 in the outside from transmission case 40 is back shafts of drive pulley 45, is the live axle of stepless speed variator.
Periphery at live axle 43 is equipped with leading pipe 44.Drive pulley 45 is by the fast pulley part 451 on the axle head that is arranged on live axle 43 and can constitutes in the movable belt pulley part that axially moves freely 452 of live axle 43.On drive pulley 45, hang with the V-shape belt 100 that is erected on the driven pulley described later.Fast pulley part 451 is fixed on the live axle 43 by nut 46, and this nut 46 is screwed on the screw section on the axle head that is arranged at live axle 43.For movable belt pulley part 452 can be moved in the live axle direction, and the wheel hub 453 of movable belt pulley part 452 is entrenched in with being free to slide the periphery of leading pipe 44.
Form bullport 47 on the wheel hub 453 of movable belt pulley part 452, this bullport 47 is exactly the axial very long slotted hole at live axle 43.Periphery setting at leading pipe 44 is provided with guide finge 48, and the head 481 of this guide finge 48 is projected in the bullport 47.Snap ring 49 is set on the head of guide finge 48, and this snap ring 49 covers the part relative with the inner face of bullport 47 at least, is the little fluorine-type resin of friction factor etc. on surface.Preferably as shown in the figure, also cover the part relative with the periphery of leading pipe 44.In view of the above, the movable belt pulley part 452 that is fixed with wheel hub 453 is by guide finge 48, and restriction is with respect to leading pipe 44, i.e. the displacement of the sense of rotation of live axle 43 only can move axially with respect to live axle 43.Because guide finge 48 is by snap ring 49, slide with the bullport 47 of wheel hub 453, so the action of movable belt pulley part 452 is smooth and easy, the generation of the sound that also can suppress to slide.
Bearing retaining ring 50 arranged in that the periphery of the wheel hub 453 of movable belt pulley part 452 is chimeric, at the inner ring of the chimeric bearing 51 of the periphery of this retaining ring 50.Chimeric slide block retaining ring 52 has again in the outer ring of bearing 51, chimeric slide block 53 on this retaining ring 52.Slide block 53 is cylindric, at outside formative gear 531, the feed ring 54 that forms internal thread (screw) on interior week is arranged in inboard intercalation.The internal thread of feed ring 54 screws togather with the outside thread (screw) that forms on the periphery of cylindrical shell 55.Cylindrical shell 55 is fixed on the transmission case 40 by bolt 56 by being welded on the lip part of its periphery.
Then, the drive portion of transmission of power being given the gear 531 of above-mentioned slide block 53 is described.The drive portion of the gear 531 of driving sliding block 53 has gearing and motor.Motor 57 has substrate 571 and shell 572, and substrate 571 is fixed on the final controlling element cover 58 of transmission case 40 by intercalation.At the front end of motor drive shaft 59, form output gear 591.
Gearing 60 has the 2nd grade of gear 65,66 on the 1st grade of gear 62,63 that is fixed on the common shaft 61 and the common shaft 64 that is fixed on other.In order to reduce the action sound, each gear of gearing 60 can be resin system.The axle 61 of the 1st grade of gear is supported by the bearing 68 that is arranged on the bearing 67 on the transmission case 40 and be arranged on the final controlling element cover 58.On the other hand, the axle 64 of the 2nd grade of gear is supported by the bearing 70 that is arranged on the bearing 69 on the transmission case 40 and be arranged on the final controlling element cover 58.Gearwheel 62 in the 1st grade of gear and output gear 591 engagements, small gear 63 meshes with gearwheel 65 in the 2nd grade of gear.Then, the small gear in the 2nd gear 66 meshes with the gear 531 of above-mentioned slide block 53.
Formative gear 641 on extending portion axle 64, that connect bearing 70 of the 2nd grade of gear.Gear 641 is gears on worm, this gear on worm 641 and worm gear engagement, and this worm gear is connected (turn-sensitive device and worm gear aftermentioned) with rotating type adjustable resistor or rotary-type current potential meter as turn-sensitive device.Like this, axle 64 has the function as the sensor output shaft that the rotating amount of gearing 60 is transmitted to turn-sensitive device.
On transmission case 40, form stiffening rib 402, surround the periphery of the gear 531 that on above-mentioned slide block 53, forms.In the end of stiffening rib 402,, confinement plate 72 is installed by bolt 71.By confinement plate 72, restriction slide block 53 is to the boundary of drive pulley 45 side shiftings.Usually, the gear 531 of slide block 53 with in the scope that confinement plate 72 contacts is not moving.
According to above-mentioned formation, output gear 591, the 1st grade of gear 62,63 and the 2nd grade of gear 65,66 are passed through in the rotation of motor 57 successively, are delivered to the gear 531 of slide block 53, make slide block 53 rotations.As if slide block 53 rotations, then feed ring 54 rotation around cylindrical shell 55, its result is that slide block 53 quilts relatively screw thread are fed into the axial of bent axle 41.The direction of displacement of the slide block 53 that the effect by screw thread produces is to determine according to the internal thread of feed ring 54 and cylindrical shell 55 and externally threaded direction.
If slide block 53 is along live axle 43 displacements, then its action is delivered to movable belt pulley part 452 by bearing 51, the interval variation of movable belt pulley part 452 and fast pulley part 451.If the interval of fast pulley part 451 and movable belt pulley part 452 increases, then combine with the action of driven pulley described later, V-shape belt 100 is to the direction action that reduces with respect to the lash diameter of drive pulley 45.On the other hand, dwindle the power of both septal direction of fast pulley part 451 and movable belt pulley part 452, make the component effect of V-shape belt 100 to the peripheral direction pushing expansion of drive pulley 45, combine with the action of driven pulley described later, enlarge the lash diameter of V-shape belt 100.
The gear ratio of this speed changer is represented in the position of slide block 53.Therefore, the turn-sensitive device of the rotational position by detecting above-mentioned gear on worm 641 detects the position of slide block 53, and its testing result can feed back to the control of gear ratio.
The rear portion formation of stepless speed variator then, is described.In Fig. 2, driven pulley 73 is made of fast pulley part 731 and movable belt pulley part 732.Driven shaft (back shaft of driven pulley) 74 that supports driven pulley 73 supported by bearing 75,76.In side's side of driven shaft 74, promptly on the basis of Fig. 2, the end of the left part of comparing with bearing 75, intercalation bearing 77 has again, covers snap ring 78 in the forward end of comparing with bearing 77.On snap ring 78, be welded with bowl-shape clutch plate 79.Form screw thread on this end of driven shaft 74, nut 80 screws togather with this screw thread, and snap ring 78 and clutch plate 79 are fixed on the driven shaft 74 by the inner ring of bearing 77.On the intermediate portion periphery of driven shaft 74 bearing 81 is set, by this bearing 81 and above-mentioned bearing 77, the wheel hub 82 of fast pulley part 731 is installed in its periphery with respect to driven shaft 74.
Have again,, be provided with the wheel hub 83 of movable belt pulley part 732 in the periphery of the wheel hub 82 of fast pulley part 731.Movable belt pulley part 732 is with respect to fast pulley part 731, can be free to slide at the length direction of driven shaft 74.On wheel hub 82, erect and be provided with guide finge 84.Be arranged on the head that bullport 831 on the wheel hub 83 is fastened on guide finge 84, in view of the above, limit of the rotation of movable belt pulley part 732 with respect to wheel hub 83.
In the end of the wheel hub 82 of fast pulley part 731, be fixed with the dunnage 85 of clutch shoe by nut 86.Clutch shoe 87 is set on dunnage 85.Clutch shoe 87 is fixed on the arm 90, and this arm 90 has the axle sleeve 89 that is arranged on pivot 88 supportings on the dunnage 85 by setting.Arm 90 is suppressed to the direction that clutch shoe 87 leaves the inner face of clutch plate 79 by spring 91.Have, between movable belt pulley part 732 and dunnage 85, be inserted with helical spring 92, this helical spring 92 suppresses movable belt pulley part 732 to fast pulley part 731 sides.
At the rear portion of stepless speed variator, be provided with retarder 38.Retarder 38 has input gear 94 and intermediate gear 95,96 and final level gear 97, and these gears are arranged on the other end of driven shaft 74, promptly between the bearing on the basis of Fig. 2 75 and 76.Input gear 94 meshes with the gearwheel 95 of intermediate gear, the small gear 96 of intermediate gear and final level gear 97 engagements.The axle of intermediate gear 95,96 is supported by bearing 98,99, the axle of final level gear 97, and promptly output shaft 101 is supported by bearing 102,103.Bearing 76,98,103 intercalations are on the rear portion shell 403 that continues with above-mentioned stiffening rib 402, and bearing 75,99,102 intercalations are on the retarder cover 104 that is fixed on the shell 403.
Side at the wheel hub 82 of fast pulley part 731 is provided with sensor board 105, with the periphery of this sensor board 105 magnetometric sensor 106 is set relatively.Sensor board 105 is an iron, and this sensor board 105 made of iron has one to a plurality of parts of giving prominence to or caving in from periphery.Therefore, in this change in shape part, the output of magnetometric sensor 106 changes, and by the state of this variation, for example exports the interval that changes, and can detect the revolution of driven pulley 73.Magnetometric sensor 106 is fixed on the retarder cover 104.
In the above-described configuration, if in above-mentioned drive pulley 45 sides, the lash expanded in diameter of V-shape belt, then the tension force of V-shape belt 100 increases, since the increase of its tension force, the movable belt pulley part 732 of pushing expansion driven pulley 73 and the power effect between the fast pulley part 731.Its result is that at slave end, the lash diameter of V-shape belt 100 reduces.Be that reduction speed ratio reduces.On the other hand, if lash reduced at above-mentioned drive pulley 45 side V-shape belts, then the tension force of V-shape belt 100 reduces, because the reduction of its tension force, if the elastic force pressure of helical spring 92 surpasses the component that is applied to the tension force on the V-shape belt 100, then produce the movable belt pulley part 732 of driven pulley 73 and the power between the fast pulley part 731 of dwindling.Its result is that at slave end, the lash diameter of V-shape belt 100 increases.Be that reduction speed ratio increases.
If the rotation of driven pulley 73 reaches the value of regulation, then owing to the increase of centrifugal force, clutch shoe 87 contacts with clutch plate 79.If so, the driven shaft 74 that then combines with clutch plate 79 rotates, by input gear 94, intermediate gear 95,96 and final level gear 97, output shaft 101 rotations.The rotation of output shaft 101 is passed to trailing wheel 21, and two-wheeled motor vehicle can travel.
Fig. 4 is the front view of final controlling element cover 58 that is assembled in the front portion of transmission case, and Fig. 5 is the A-A sectional view of Fig. 4.Final controlling element cover 58 covers from motor 57 to axle the constituent part of 64 deceleration system as described above, and double as makes the cover of engine cooling water circuit water pump simultaneously.In Fig. 4, form tubular protuberance 581, this tubular protuberance 581 is used to take in worm gear 110 and the axle 111 thereof that meshes with gear on worm 641, and back shaft 111, and this gear on worm 641 is supported by the spring bearing 70 that is intercalated on the final controlling element cover 58.The turn-sensitive device 112 that detects the rotational position of worm gear 110 is combined on the axle 111.The detection of turn-sensitive device 112 output supplies to the not shown control gear that goes out, and detects output according to this, can by with each gears 641,65,66,531 of worm gear 110 interlocks, detect the position of movable belt pulley part 452.
In addition, final controlling element cover 58 has the axle sleeve 582,583 of the substrate 571 that is used to keep said motor 57, and with the seat 585,586 of the axle sleeve hole 584 adjacent settings of the axle sleeve of the substrate 571 of accepting motor 57.
Have, by Fig. 5, can understand better, final controlling element cover 58 makes up with the part of transmission case 40, forms the outer wall of water pump 113.In the space that surrounds by this outer wall, impeller 114 and axle 115 have been taken in.Axle 115 is by not shown transmission device that goes out and motor binding, and the rotation by motor is driven in rotation.The mouth of pipe 116 is to begin the inlet of circuit cooling water by thermostat from water tank, and the mouth of pipe 117 is by water tank and the inlet of circuit cooling water.During engine start and even coolant water temperature when reducing, water is imported,, then by water tank the water that temperature has reduced is imported from the mouth of pipe 116 if coolant water temperature reaches more than the specified value from the mouth of pipe 117.