CN1186189A - Stepless gear - Google Patents
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- CN1186189A CN1186189A CN97113112A CN97113112A CN1186189A CN 1186189 A CN1186189 A CN 1186189A CN 97113112 A CN97113112 A CN 97113112A CN 97113112 A CN97113112 A CN 97113112A CN 1186189 A CN1186189 A CN 1186189A
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- 230000007246 mechanism Effects 0.000 claims abstract description 48
- 230000005540 biological transmission Effects 0.000 claims abstract description 41
- 230000008859 change Effects 0.000 claims description 27
- 230000006835 compression Effects 0.000 description 12
- 238000007906 compression Methods 0.000 description 12
- 239000000314 lubricant Substances 0.000 description 11
- 230000009467 reduction Effects 0.000 description 9
- 230000000694 effects Effects 0.000 description 8
- 230000003247 decreasing effect Effects 0.000 description 4
- 238000003756 stirring Methods 0.000 description 3
- 239000006096 absorbing agent Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- IXSZQYVWNJNRAL-UHFFFAOYSA-N etoxazole Chemical compound CCOC1=CC(C(C)(C)C)=CC=C1C1N=C(C=2C(=CC=CC=2F)F)OC1 IXSZQYVWNJNRAL-UHFFFAOYSA-N 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 230000002153 concerted effect Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H15/00—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by friction between rotary members
- F16H15/48—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by friction between rotary members with members having orbital motion
- F16H15/50—Gearings providing a continuous range of gear ratios
- F16H15/52—Gearings providing a continuous range of gear ratios in which a member of uniform effective diameter mounted on a shaft may co-operate with different parts of another member
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Friction Gearing (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
- Ultra Sonic Daignosis Equipment (AREA)
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Abstract
A continuously variable transmission T comprises a drive face 29 supported on the outer periphery of an input shaft 23; a driven face 30 supported on the outer periphery of an output shaft 22; a plurality of double cones 39 supported on cone holders 31 and 56 and making contact with the two faces 29 and 30; and a torque cam mechanism 33 arranged between the cone holders 31 and 56. The torque cam mechanism 33 comprises a roller 36 and a guide groove 41, and the roller 36 arranged at the cone holders 31 and 56; and a guide groove 41 arranged on the inner wall of the casing in such a state to be inclined with an axis L and engaged with the roller 36. When input torque of the cone holders 31 and 56 are changed, the cone holders 31 and 56 are moved in the direction of an axis L.
Description
The present invention relates to a kind of stepless speed variator, this speed changer possess bicone, this bicone is by being constituted with the 1st conical surface of active surface butt with the 2nd conical surface of driven surface butt, by changing active surface and driven surface position, change the stepless speed variator of gear ratio to the abutment of the 1st conical surface and the 2nd conical surface.
Such stepless speed variator as Japanese patent gazette special put down in writing for public clear 47-447 number, be well-known.
But the problem that above-mentioned existing stepless speed variator exists is: owing to will carry out the control of gear ratio with manual control from the casing outside, therefore can not automatically change gear ratio according to the operating condition of vehicle, driving operation palls.Another problem is: if with the operating condition of sensor detected vehicle, according to this operating condition, drive executive component with electric control device, make the words of its control gear ratio, then complex structure, cost height.
The present invention proposes in view of the above problems, its objective is the gear ratio of automatically controlling stepless speed variator with simple structure.
In order to achieve the above object, the stepless speed variator that first aspect present invention is put down in writing has: casing; Rotation is bearing in the active surface on the transmission main shaft freely; Rotation is bearing in the driven surface on the transmission main shaft freely; Along the mobile freely conical support of transmission main shaft; The edge is that the element of cone of center line is bearing in the bicone supporting axle on the conical support with the transmission main shaft; By the 1st conical surface of total bottom surface and the 2nd conical surface constitute, rotate be bearing on the bicone supporting axle freely, the 1st conical surface is connected to while the 2nd conical surface on the active surface and is connected to bicone on the driven surface; Make this conical support along moment of torsion pattern mechanism that the axial direction of transmission main shaft moves according to the input torque of conical support; it is characterized in that: moment of torsion pattern mechanism has guiding groove and is directed to part; this guiding groove is arranged on a side of casing and conical support; make its above-mentioned relatively axis tilt; this is directed to the opposing party that part is arranged on casing and conical support, and fastens with above-mentioned guiding groove.
In addition, the stepless speed variator that second aspect present invention is put down in writing comprises: rotation is bearing in the active surface on the transmission main shaft freely; Rotation is bearing in the driven surface on the transmission main shaft freely; Along the mobile freely conical support of transmission main shaft; The edge is that the element of cone at center is bearing in the bicone supporting axle on the conical support with the transmission main shaft; By the 1st conical surface of total bottom surface and the 2nd conical surface constituted, rotated be bearing on the bicone supporting axle freely, the 1st conical surface is connected to while the 2nd conical surface on the active surface and is connected to bicone on the driven surface; The centrifugal mechanism that conical support is moved according to the input speed of transmission main shaft along the axial direction of transmission main shaft, it is characterized in that: centrifugal mechanism comprises stationary cam face, movable cam face and is configured in centrifugal weight between above-mentioned two camming surfaces, the said fixing camming surface is arranged on the back side of active surface and can not moves along above-mentioned axis body direction, and above-mentioned movable cam face is arranged to stationary cam in the face of putting and can moving along above-mentioned axial direction with conical support.
The 3rd aspect of the present invention in addition, on the basis of the structure of first aspect present invention, it is characterized in that: also have centrifugal mechanism, this centrifugal mechanism makes conical support move along the axial direction of transmission main shaft according to the input speed of transmission main shaft, above-mentioned centrifugal mechanism has the stationary cam face, movable cam face and be configured in centrifugal weight between above-mentioned two camming surfaces, the said fixing camming surface is arranged on the back side of active surface and can not moves along above-mentioned axial direction, and above-mentioned movable cam face is arranged to stationary cam in the face of putting and can moving along above-mentioned axial direction with conical support.
In addition, the 4th aspect of the present invention is characterised in that on the basis of the structure aspect the present invention the 1st: the angle of inclination with respect to the above-mentioned guiding groove of above-mentioned axis is variable.
In addition, the 5th aspect of the present invention is characterised in that on the basis of the structure aspect the 4th: above-mentioned angle of inclination can change according to the torque that is input to conical support.
In addition, the 6th aspect of the present invention is characterised in that on the basis of the structure aspect the 5th: above-mentioned angle of inclination changes according to driver's control command.
Following foundation embodiments of the invention shown in the drawings describe form of implementation of the present invention.
Fig. 1 is the sectional arrangement drawing of power equipment for vehicle.
Fig. 2 is the enlarged view at the main position of Fig. 1.
Fig. 3 is the sectional drawing along the 3-3 line of Fig. 2.
Fig. 4 is the sectional drawing along the 4-4 line of Fig. 2.
Fig. 5 is expression figure the 2nd embodiment of the present invention, corresponding with above-mentioned Fig. 2.
Fig. 6 is the direction view along the amplification of the 6-6 cutting line of Fig. 5.
Fig. 7 is the explanatory drawing of the effect of moment of torsion pattern mechanism.
Fig. 8 is the plotted curve of explanation the 2nd embodiment's effect.
Fig. 1～shown in Figure 4 is the 1st embodiment of the present invention.
As shown in Figure 1, power plant P carries on motorcycle, has the casing 1 of taking in motor E and stepless speed variator T.Casing 1 can be decomposed into 3 parts: central box 2; Be connected the left box body 3 of the left surface of central box 2; Be connected the right case 4 of the right flank of central box 2.Bent axle 6 is bearing on central box 2 and the left box body 3 by a pair of ball bearing 5,5, and cylinder body 7 is bearing on central box 2 and the left box body 3 equally, and piston 8 matches with cylinder body 7 sliding freely, and bent axle 6 is connected with piston 8 by connecting rod 9.
The left end of bent axle 6 is provided with generator 10, and this generator 10 is covered by the generating hood that the left surface with left box body 3 is connected.Driving gear 12 can be bearing in the right-hand member periphery of the bent axle 6 that extends to right case 4 inside relatively freely rotatably, and this driving gear 12 can combine with this bent axle 6 by the automatic centrifugal clutch 13 that is arranged on bent axle 6 right-hand members.
Words with reference to Fig. 2 can be clearer and more definite simultaneously, the transmission main shaft 21 of stepless speed variator T is made of the output shaft 22 of inboard and the input shaft 23 of sleeve shape, this input shaft 23 can be engaged in the periphery of this output shaft 22 relatively freely rotatably by needle bearing 24, and the two ends of output shaft 22 are erected between left box body 3 and the right case 4.Be fixed on the input shaft 23 with the driven gear 25 of above-mentioned driving gear 12 engagements.Driven gear 25 is made of the inboard gear halfbody 26 and the outboard gears halfbody 27 that are connected with input shaft 23 splines, this outboard gears halfbody 27 is by a plurality of rubber absorbers 28 ... be connected with this inboard gear halfbody, make it can only relatively rotate a little, and be meshed with above-mentioned driving gear 12.When the Engine torque that is passed to input shaft 23 through driven gear 25 from driving gear 12 changes, by above-mentioned rubber absorbers 28 ... distortion alleviate impact.
Roughly make cone shape the 1st conical support 31 is bearing in driven surface 30 by needle bearing 32 shaft hub 30
2Periphery can be rotated relatively and can be endwisely slipped.Words with reference to Fig. 3 can be clearer and more definite simultaneously, stops the 1st conical support 31 to comprise relative to the moment of torsion pattern mechanism 33 that casing 1 rotates: to plant (setting) bearing pin 34 in the 1st conical support 31 peripheries along radial direction; Be bearing in roller 36 on this bearing pin 34 by ball bearing 35; Can guide the guiding groove 4 on the inwall this roller 36, that be formed at right case 4
1 Guiding groove 4
1The axis L tilt angle alpha of the relative transmission main shaft 21 of direction.
Set up a plurality of bicone supporting axles 37 ..., make it cross a plurality of windows 31 that are formed on the 1st conical support 31
1, bicone 39 can be bearing on each bicone supporting axle 37 freely rotatably by needle bearing 38,38.Bicone supporting axle 37 ... the axis L that is configured in transmission main shaft 21 is on the element of cone of center line, from the abutting part 29 of active surface 29
1Abutting part 30 with driven surface 30
1Between pass.Each bicone 39 by the 1st conical surface 40 of total bottom surface and the 2nd conical surface 41 constitute the abutting part 29 of active surface 29
1Be connected on the 1st conical surface 40, simultaneously, the abutting part 30 of driven surface 30
1Be connected on the 2nd conical surface 41.
Be provided with centrifugal mechanism 51 on the right side of driven gear 25, this centrifugal mechanism 51 changes the gear ratio of stepless speed variator T according to the rotating speed of input shaft 23 by the 1st conical support 31 is slided in the axial direction.Centrifugal mechanism 51 comprises: the sleeve 52 that is fixed on the periphery of input shaft 23; Cam part 54 and a plurality of centrifugal weight 55 that can match with the periphery of sleeve 52 slidably freely by lining 53 ..., this centrifugal weight 55 ... be configured in stationary cam face 26
1With movable cam face 54
1Between, this stationary cam face 26
1Be formed at the right flank of the inboard gear halfbody 26 of driven gear 25, this movable cam face 54
1Be formed at the left surface of cam part 54.The periphery that covers the 2nd conical support 56 of centrifugal mechanism 51 is fixed on the right-hand member of the 1st conical support 31 with jump ring 57, and the interior week of the 2nd conical support 56 is bearing on the cam part 54 by ball bearing 58.
The 1st conical support 31 and 56 concerted actions of the 2nd conical support, and delimit the space that surrounds transmission main shaft 21, driven gear 25, active surface 29 and centrifugal mechanism 51 have been taken in by portion within it.Above-mentioned space is by 1 window 312 and supporting bicone 39 near driven gear 25 flank of tooth ... window 31
1Be connected with the inner space of casing 1.
The blowout patche with the level 59 that matches with the right-hand member of above-mentioned sleeve 52 is bearing in the right-hand member periphery of output shaft 22 by ball bearing 60, and the right flank of this ball bearing 60 is fixed on the output shaft 22 with baffle ring 61.The transmission main shaft of being made up of output shaft 22 and input shaft 23 21 is bearing on the right case 4 by the ball bearing 62 that the periphery with input shaft 23 matches.Spring 54 compression is arranged between the spring seat 62 and the 2nd conical support 56 that is supported on the above-mentioned ball bearing 62, the 2nd conical support 56 and the 1st conical support 31 is suppressed left by the spring force of this spring 64.
And, when the rotating speed of input shaft 23 increases, centrifugal weight 55 ... because of centrifugal force side shifting, pushing two camming surfaces 26 outside radial direction
1, 54
1, therefore, the spring force of cam part 54 resistance springs 64 moves right, and the 2nd conical support 56 and the 1st conical support 31 that are connected with this cam part 54 by ball bearing 58 slide to the right.
Return Fig. 1, the 3rd reduction gear 71 is bearing on the left box body 3 freely by ball bearing 70 rotations, and the left end of output shaft 22 is bearing on the 3rd reduction gear 71 coaxially by needle bearing 72 and ball bearing 73.Deboost axle 75 is bearing on left box body 3 and the central box 2 by a pair of ball bearing 74,74, and the 1st reduction gear 76 and the 2nd reduction gear 77 that are arranged on the deboost axle 75 are meshed with above-mentioned output gear 66 and the 3rd reduction gear 71 respectively.Be provided with the driving sprocket wheel 79 of coiling annular link chain 78 at the axial region front end that projects to the 3rd outside reduction gear 71 from left box body 3.Therefore, the rotation of output shaft 22 is passed to driving wheel by output gear 66, rate 1 reduction gear the 76, the 2nd reduction gear the 77, the 3rd reduction gear 71, driving sprocket wheel 79 and annular link chain 78.
Be arranged in the oil circuit 42 of right case 4 inside and the oil circuit 22 that axially connects output shaft 22 inside
1Be connected, each one of stepless speed variator T is by from this oil circuit 22
1The lubricant oil that supplies to the 1st conical support 31 and the 2nd conical support 56 inner spaces is lubricated.
Effect to the embodiment of the invention with said structure describes below.
As shown in Figure 2, active surface 29 abutting parts 29 that record from the axis L of transmission main shaft 21
1Distance A be certain value, active surface 29 abutting parts 29 that record from bicone supporting axle 37
1Be variable value (B apart from B
L, B
T).In addition, driven surface 30 abutting parts 30 that record from bicone supporting axle 37
1Distance C be variable value (C
L, C
T), from the axis L of transmission main shaft 21 to driven surface 30 abutting parts of being surveyed 30
1Distance D be certain value.
If the rotating speed of active surface 29 is N
DR, driven surface 30 rotating speed be N
DN, R is defined as R=N when gear ratio
DR/ N
DNThe time, then gear ratio R is provided by following formula:
R＝N
DR/N
DN＝(B/A)×(D/C)
Shown in the first half of Fig. 2, when motor E low speed rotation, the rotating speed of the driven gear 25 that reason driving gear 12 drives is low, so act on the centrifugal weight 55 of centrifugal mechanism 51 ... centrifugal force also little, the 2nd conical support 56 and the 1st conical support 31 are moved to the left under the spring force effect of spring 64.When the 1st conical support 31 is moved to the left, the abutting part 29 of active surface 29
1Bottom surface one side shifting to the 1st conical surface 40 of bicone 39 increases to maximum value B apart from B
L, simultaneously, the abutting part 30 of driven surface 30
1To summit one side shifting of the 2nd conical surface 41 of bicone 39, distance C is decreased to minimum value C
1
Be certain value because of above-mentioned distance A, D this moment, so when increasing to maximum value B apart from B
L, distance C is decreased to minimum value C
1The time, it is big that above-mentioned gear ratio R becomes, and speed change is to low rate (Low レ シ オ).
In addition, shown in the Lower Half of Fig. 2, when motor E high speed rotating, the rotating speed height of the driven gear 25 that reason driving gear 12 drives, so act on the centrifugal weight 55 of centrifugal mechanism 51 ... centrifugal force also big, the 2nd conical support 56 and the 1st conical support 31 are at the centrifugal weight 55 because of centrifugal force side shifting outside radial direction ... effect under, the resistance spring 64 spring force move right.When the 1st conical support 31 moves right, the abutting part 29 of active surface 29
1Summit one side shifting to the 1st conical surface 40 of bicone 39 is decreased to minimum value B apart from B
T, simultaneously, the abutting part 30 of driven surface 30
1To bottom surface one side shifting of the 2nd conical surface 41 of bicone 39, distance C increases to maximum value C
T
Be certain value because of above-mentioned distance A, D this moment, so when being decreased to minimum value B apart from B
T, distance C increases to maximum value G
TThe time, above-mentioned gear ratio R diminishes, and speed change is to two-forty (TOP レ シ オ).
So, can make gear ratio stepless variation between low rate and two-forty of stepless speed variator T according to the rotating speed of motor E.And can automatically carry out by centrifugal mechanism 51 because of the control of above-mentioned gear ratio, so manually carry out the situation of the gear change control device of speed change manipulation compares with the situation that the electrical shift control gear is set from the outside of casing 1 with setting, because of simple in structure, can reduce cost and make stepless speed variator T miniaturization.
As mentioned above, the rotation of active surface 29 is by bicone 39 ..., the gear ratio R with regulation is passed to driven surface 30, and further, the rotation of driven surface 30 is passed to output gear 66 by compression relief cam mechanism 67.At this moment, if, counterrotating words between driven surface 30 and output gear 66, occur, driven surface 30 is suppressed to the direction of leaving output gear 66 by compression relief cam mechanism 67 because of acting on the moment of torsion on the driven surface 30.This elastic force pressure makes it produce following surface pressure with the elastic force pressure synergy that is produced by butterfly spring 69: the abutting part 29 of active surface 29
1Be crimped on the 1st conical surface 40 of bicone 39 surface pressure and the abutting part 30 of driven surface 30
1Be crimped on the surface pressure on the 2nd conical surface 41 of bicone 39.
Though the elastic force pressure that is produced by above-mentioned compression relief cam mechanism 67 pushes output gear 66 left, because of the left end of output gear 66 is fixed in the left end of output shaft 22 with baffle ring 65, so above-mentioned left pushing force is passed to output shaft 22.In addition, though the elastic force pressure that is produced by above-mentioned compression relief cam mechanism 67 pushes driven surface 30 to the right, but this pushing force is from driven surface 30, by bicone 39 ..., active surface 29, inboard gear halfbody 26, sleeve 52, ball bearing 62, blowout patche 59, ball bearing 60 and baffle ring 61, be passed to the right-hand member of output shaft 22.
Therefore, compression relief cam mechanism 67 is with the load of output gear 66 and driven surface 30 direction pushing to the left and right, tension load as output shaft 22 works, and this tension load is output the internal stress of axle 22 and has offset, and the racking of compression relief cam mechanism 67 is not passed to casing 1.Therefore, needn't strengthen the intensity of casing 1,, help the lightweight of stepless speed variator T so that it can bear above-mentioned racking.And, because suppress active surface 29 and driven surface 30 both sides with 1 compression relief cam mechanism 67, thus with suppress active surface 29 respectively with another compression relief cam mechanism 67 and compare with the situation of driven surface 30, can reduce the parts number of packages and reduce cost.
In addition, when stepless speed variator T carries out speed change, the 1st conical support 31; because the transmitting torque counter-force of active surface 29; and rotation around transmission main shaft 21, but owing to be supported on the roller 36 of the moment of torsion pattern mechanism 33 on the 1st conical support 31, with the guiding groove 4 that is formed on the right case 4
1Fasten, so this transmitting torque is prevented from the slip vertically rotatably of the 1st conical support 31.
Vehicle will promptly quicken in the process of moving, and under the situation that Engine torque has been increased rapidly, along with the increase rapidly of above-mentioned Engine torque, the transmitting torque counter-force that acts on the 1st conical support 31 also will increase.Consequently, as shown in Figure 3, roller 36 is crimped on the guiding groove 4 of inclination by load F
1Wall on, by the guiding groove 4 of this load F
1The component F of direction
1, make the 1st conical support 31 suppress left side (low rate side) to Fig. 2.That is, because the effect of moment of torsion pattern mechanism 33, gear ratio automatically changes to the low rate side, therefore, can bring into play the so-called effect of turning down retaining, and vehicle is quickened.
Yet, control the above-mentioned gear ratio of turning down when keeping off, special gear change control device is not set, moment of torsion pattern mechanism 33 can automatically carry out according to the variation of Engine torque, therefore, since simple in structure, can realize that cost reduces and the miniaturization of stepless speed variator T.In addition, only change the guiding groove 4 of moment of torsion pattern mechanism 33
1Shape, just can adjust the variation characteristic of gear ratio at an easy rate.
The 1st conical support 31 of stepless speed variator T and the bottom of the 2nd conical support 56 are immersed in and store in the lubricant oil of casing 1 bottom, but because of supporting bicone 39 ... window 31
1With window 32 near driven gear 25 flank of tooth
2Be in the position (with reference to Fig. 2) that is higher than lubricant oil pasta OL, so the lubricant oil that does not have volume is immersed in the inner space of the 1st conical support 31 and the 2nd conical support 56 from the bottom of casing 1.In addition, even the lubricant oil of lubricated usefulness is from connecting the oil circuit 22 of output shaft 22 inside
1Supply to the inner space of the 1st conical support 31 and the 2nd conical support 56, this lubricant oil also can reason in the rotation of driven gear 25 and the action of centrifugal force that produces is splashed to the outside, therefore the inner space of the 1st conical support 31 and the 2nd conical support 56 only can keep lubricated necessary minimal lubricant oil.
So driven gear 25 only stirs a spot of lubricant oil, can be suppressed at inferior limit to the power loss that brings owing to the unnecessary lubricant oil of stirring.And,, can reduce the parts number of packages so special lubricant oil retardance part needn't be set because block by the 1st conical support 31 and 56 pairs of lubricant oil of the 2nd conical support.
As mentioned above, owing in the space that the 1st conical support 31 and the 2nd conical support 56 delimited, disposed driven gear 25, so compare with the occasion that this driven gear 25 is configured in outside the above-mentioned space, can not only reduce to stir oily resistance, and because active surface 29 and main concentric mechanism 51 separate configuration the left and right sides at driven gear 25, so can effectively utilize the volume in above-mentioned space, make stepless speed variator T compactness.
Fig. 5～shown in Figure 8 is the 2nd embodiment of the present invention.
The 2nd embodiment improves the 1st embodiment's moment of torsion pattern mechanism 33 and obtains; as illustrated in Figures 5 and 6; the 2nd embodiment's moment of torsion pattern mechanism 33 has guiding element 43, and this guiding element 43 can joltily be bearing on the diapire of right case 4 freely by the pin 42 that above-below direction extends.Guiding element 43 is to clip the roller groove 43 that pin 42, an end have the U font that engages with roller 36
1, and the other end has arm 43
2, at this arm 43
2Front end and be formed at spring seat 4 on the right case 4
2, 4
2Between, be provided with a pair of spring 44,44.When moment of torsion was not delivered on the 1st conical support 31, guiding element 43 was suppressed to the position that is in Fig. 6 parallel with transmission main shaft 21 by spring 44,44.
Therefore, when stepless speed variator T speed change, if the 1st conical support 31 is because the transmitting torque counter-force of active surface 29 will be around transmission main shaft 21 rotations, because the effect of this transmitting torque counter-force, guiding element 43 is around pin 42 swing, stops at the position with Fig. 7 (A) of the spring force balance of spring 44,44.The roller groove 43 of this moment
1Relatively the tilt angle alpha that become of the axis L of transmission main shaft 21 is not certain, changes with the variation of transmitting torque.Specifically because tilt angle alpha also increases when transmitting torque increases, so to the speed change of high side be difficult to carry out, the rotating speed increase of speed change.
Be roller groove 4 shown in Fig. 8 A (A)
1Tilt angle alpha be the speed change characteristic of the 1st fixing embodiment stepless speed variator T, be roller groove 43 shown in Fig. 8 (B)
1Tilt angle alpha be the speed change characteristic of variable the 2nd embodiment's stepless speed variator T.As this figure expressed, the 2nd embodiment's that tilt angle alpha is variable stepless speed variator T was at transmitting torque hour, tilt angle alpha diminishes, so can be with lower engine speed to high side speed change, not only quiet more travelling is feasible, and can also reduce specific fuel consumption.On the other hand, when transmitting torque was big, it is big that tilt angle alpha becomes, so can be feasible to high side speed change, more powerful travelling with higher engine speed.
On the contrary, when output shaft 22 1 side direction input shafts 23 1 sides were transmitted, just when engine braking, guiding element 43 was around pin 42 backswings at moment of torsion, stopped at the position with Fig. 7 (B) of the spring force balance of spring 44,44.In this case, roller groove 43
1The tilt angle alpha that the axis L of relative transmission main shaft 21 is become is not certain, can increase with the increase of transmitting torque yet.Therefore, on the abrupt slope during engine braking, because above-mentioned tilt angle alpha increases, so the speed change to high side is difficult to carry out, improved engine braking performance, on the level land during engine braking, because of above-mentioned tilt angle alpha reduces, carry out easily so become, can suppress motor and too brake to the speed change of high side.
More than describe embodiments of the invention in detail, but the present invention can carry out various change designs in the scope that does not depart from its main points.
For example, the 1st, the 2nd embodiment's moment of torsion pattern mechanism 33 is arranged on roller 36 on the 1st conical support 31, with roller groove 4
1, 43
1Be arranged on casing 1 side, even but its position relation also can conversely.In addition, in the 2nd embodiment,, also can handle with switch and make its swing, or manual manipulation of driver makes its swing with hydraulic actuator or electromagnetic actuator by the driver though be to make its size automatically swing guiding element 43 according to transmitting torque.So, can set the speed change characteristic arbitrarily according to driver's hobby.
As mentioned above, according to the invention that claim 1 is put down in writing, owing to having, the moment of torsion master form mechanism leads To groove be directed to part, this gathering sill is arranged on one of casing and conical support side, makes its relative axis Tilt, describedly be directed to the opposing party that part is arranged on casing and conical support, and with above-mentioned gathering sill phase Engaging so do not need hand gear to handle, need not arrange baroque electrical control gear in addition, Can automatically control according to the size that is passed to the moment of torsion of conical support the gear ratio of buncher. And And, by suitably setting the shape of above-mentioned gathering sill, can adjust at an easy rate the speed change characteristic.
In addition, the invention of putting down in writing according to claim 2 since centrifugal mechanism have the stationary cam face, Movable cam face and centrifugal weight, described stationary cam face be arranged on active surface the back side and also can not Move along axis direction, described movable cam face is arranged to stationary cam in the face of putting, and can with cone The shape support moves along above-mentioned axis direction together, and described centrifugal weight is configured in above-mentioned two cam surfaces Between, do not handle so need not carry out hand gear, and baroque electrical control dress need be set Put, can automatically control according to the input speed of transmission main shaft the gear ratio of buncher. And By arranging that reasonably centrifugal mechanism can make the axial dimension miniaturization of buncher.
In addition, the invention put down in writing according to claim 3 is because can be according to being passed to conical support The input speed of moment of torsion and transmission main shaft is automatically controlled the gear ratio of buncher, so can be honest and clean Provide valency and be fit to for motor vehicle buncher.
The invention of putting down in writing according to claim 4 is because be arranged at one of casing and conical support side The angle of inclination that gathering sill becomes with respect to above-mentioned axis is variable, so can at random adjust stepless change The speed change characteristic of speed device.
The invention of putting down in writing according to claim 5 is because above-mentioned angle of inclination can be according to being input to taper Moment of torsion on the support and changing is so even do not handle especially also can be according to the running shape for the driver Attitude is automatically adjusted the speed change characteristic.
The invention of putting down in writing according to claim 6 is because above-mentioned angle of inclination is according to driver's manipulation Instruction and changing is so can select the speed change characteristic according to driver's hobby.
Claims (6)
1. stepless speed variator comprises:
Rotation is bearing in the active surface (29) on the transmission main shaft (21) freely;
Rotation is bearing in the driven surface (30) on the transmission main shaft (21) freely;
Along the mobile freely conical support (31,56) of transmission main shaft (21);
Along being that the element of cone of center line is bearing in the bicone supporting axle (37) on the conical support (31,56) with transmission main shaft (21);
By the 1st conical surface (40) of total bottom surface and the 2nd conical surface (41) constituted, rotated be bearing on the above-mentioned bicone supporting axle (37) freely, the 1st conical surface (40) is connected on the active surface (29), while the 2nd conical surface (41) is connected to the bicone (39) on the driven surface (30);
According to the input torque of conical support (31,56), make this conical support (31,56) along the moment of torsion pattern mechanism (33) that axis (L) direction of transmission main shaft (21) moves,
It is characterized in that:
Moment of torsion pattern mechanism (33) has guiding groove (4
1, 43
1) and be directed to part (36), this guiding groove (4
1, 431
)Be arranged on one of casing (1) and conical support (31,56) side, its above-mentioned relatively axis (L) is tilted, this is directed to the opposing party that part (36) is arranged on casing (1) and conical support (31,56), with above-mentioned guiding groove (4
1, 43
1) fasten.
2. stepless speed variator comprises:
Rotation is bearing in the active surface (29) on the transmission main shaft (21) freely;
Rotation is bearing in the driven surface (30) on the transmission main shaft (21) freely;
Along the mobile freely conical support (31,56) of transmission main shaft (21);
Along being that the element of cone of center line is bearing in the bicone supporting axle (37) on the conical support (31,56) with transmission main shaft (21);
By the 1st conical surface (40) of total bottom surface and the 2nd conical surface (41) constituted, rotated be bearing on the above-mentioned bicone supporting axle (37) freely, the 1st conical surface (40) is connected on the active surface (29), while the 2nd conical surface (41) is connected to the bicone (39) on the driven surface (30);
According to the input speed of transmission main shaft (21), the centrifugal mechanism (51) that conical support (31,56) is moved along axis (L) direction of transmission main shaft (21),
It is characterized in that:
Centrifugal mechanism (51) has stationary cam face (26
1), movable cam face (54
1) and be configured in above-mentioned two camming surfaces (26
1, 54
1) between centrifugal weight (55), this stationary cam face (26
1) be arranged on the back side of active surface (29) and can not move this movable cam face (54 along above-mentioned axis (L) direction
1) be arranged to and stationary cam face (26
1) opposed and can move along above-mentioned axis (L) direction together with conical support (31,56).
3. the stepless speed variator of putting down in writing as claim 1, it is characterized in that: also have centrifugal mechanism (51), this centrifugal mechanism (51) makes conical support (31 according to the input speed of transmission main shaft (21), 56) axis (L) direction along transmission main shaft (21) moves, and above-mentioned centrifugal mechanism (51) has stationary cam face (26
1), movable cam face (54
1) and be configured in above-mentioned two camming surfaces (26
1, 54
1) between centrifugal weight (55), said fixing camming surface (26
1) be arranged on the back side of active surface (29) and can not move above-mentioned movable cam face (54 along above-mentioned axis (L) direction
1) be arranged to and stationary cam face (26
1) opposed and can move along above-mentioned axis (L) direction.
4. the stepless speed variator of putting down in writing as claim 1 is characterized in that: the above-mentioned guiding groove (43 of above-mentioned relatively axis (L)
1) angle of inclination (α) be variable.
5. the stepless speed variator of putting down in writing as claim 4 is characterized in that: above-mentioned angle of inclination (α) can be according to being input to the torque of conical support (31,56) and changing.
6. the stepless speed variator of putting down in writing as claim 4, it is characterized in that: above-mentioned angle of inclination (α) can change according to driver's control command.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP348409/1996 | 1996-12-26 | ||
| JP348409/96 | 1996-12-26 | ||
| JP34840996A JP3585684B2 (en) | 1995-12-28 | 1996-12-26 | Continuously variable transmission |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1186189A true CN1186189A (en) | 1998-07-01 |
| CN1076091C CN1076091C (en) | 2001-12-12 |
Family
ID=18396828
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN97113112A Expired - Fee Related CN1076091C (en) | 1996-12-26 | 1997-05-20 | Stepless gear |
Country Status (4)
| Country | Link |
|---|---|
| KR (1) | KR100278195B1 (en) |
| CN (1) | CN1076091C (en) |
| ID (1) | ID19395A (en) |
| IT (1) | IT1292320B1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105276008A (en) * | 2014-07-04 | 2016-01-27 | 本田技研工业株式会社 | Radial thrust bearing preload adjustment mechanism and continuously variable transmission (CVT) using the same |
| CN107289082A (en) * | 2016-03-30 | 2017-10-24 | 罗伯特·博世有限公司 | Conical ring formula infinitely variable transmission |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS47447Y1 (en) * | 1967-06-27 | 1972-01-10 | ||
| NL9301646A (en) * | 1993-09-23 | 1995-04-18 | Doornes Transmissie Bv | Infinitely adjustable transmission. |
-
1997
- 1997-05-20 IT IT97TO000429 patent/IT1292320B1/en active IP Right Grant
- 1997-05-20 CN CN97113112A patent/CN1076091C/en not_active Expired - Fee Related
- 1997-05-30 ID IDP971838A patent/ID19395A/en unknown
- 1997-11-27 KR KR1019970063578A patent/KR100278195B1/en not_active IP Right Cessation
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105276008A (en) * | 2014-07-04 | 2016-01-27 | 本田技研工业株式会社 | Radial thrust bearing preload adjustment mechanism and continuously variable transmission (CVT) using the same |
| CN107289082A (en) * | 2016-03-30 | 2017-10-24 | 罗伯特·博世有限公司 | Conical ring formula infinitely variable transmission |
Also Published As
| Publication number | Publication date |
|---|---|
| IT1292320B1 (en) | 1999-01-29 |
| ID19395A (en) | 1998-07-09 |
| KR19980063625A (en) | 1998-10-07 |
| CN1076091C (en) | 2001-12-12 |
| ITTO970429A0 (en) | 1997-05-20 |
| ITTO970429A1 (en) | 1998-11-20 |
| KR100278195B1 (en) | 2001-03-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |