JP3424354B2 - Toroidal type continuously variable transmission - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [0001] BACKGROUND OF THE INVENTION 1. Field of the Invention
The transmission can be used, for example, as a transmission for automobiles or in various industries.
Used as a transmission for industrial machinery. [0002] 2. Description of the Related Art FIGS.
It has been studied to use a toroidal type continuously variable transmission
Have been. This toroidal type continuously variable transmission is, for example,
As disclosed in JP-A-62-71465,
Supports input side disk (first disk) 2 concentrically with shaft 1
And, at the end of the output shaft 3 arranged concentrically with the input shaft 1
The output side disk (second disk) 4 is fixed. G
Inside the casing containing the toroidal-type continuously variable transmission,
It is in a twisted position with respect to the input shaft 1 and the output shaft 3
The trunnions 6, 6 that swing about the pivots 5, 5 are provided.
Have been killed. [0003] Each trunnion 6, 6 has a front surface at both end portions.
The pivots 5, 5 are provided. In addition, each trunnion 6, 6
The center part supports the base ends of the displacement shafts 7, 7,
Swing each trunnion 6, 6 around 5, 5
Allows the inclination angle of each displacement shaft 7, 7 to be adjusted freely.
I have. Of the displacement shafts 7, 7 supported by the respective trunnions 6, 6
Power rollers 8 and 8 are rotatably supported around the
I have Then, each of the power rollers 8, 8 is
It is sandwiched between the force side and output side disks 2 and 4. The input and output disks 2, 4 are mutually
The opposing inner surfaces 2a, 4a each have a cross section
Form a concave surface obtained by rotating an arc around axis 5
ing. And each power roller formed on the spherical convex surface
The peripheral surfaces 8a, 8a of the 8, 8 correspond to the inner side surfaces 2a, 4a.
In contact. [0005] Between the input shaft 1 and the input side disk 2
Is provided with a loading device 9 of a loading cam type.
The input side disk 2 is connected to the output side disk by the device 9.
The elastic member 4 is pressed elastically. This pressing device 9
Is a cam plate 10 that rotates together with the input shaft 1 and a retainer 11
(For example, four) rollers 12 held by
12. One side of the cam plate 10
(Right side surfaces in FIGS. 4 and 5) are uneven surfaces extending in the circumferential direction.
Outer surface of the input side disk 2
A similar cam surface 14 is also formed on the left side of FIGS.
ing. Then, the plurality of rollers 12, 12 are moved forward.
Rotation about the axis in the radial direction with respect to the center of the input shaft 1
It is supported for free rotation. [0006] The toroidal type steplessly constructed as described above.
When the high speed gear is used, the cam plate 10 rotates with the rotation of the input shaft 1.
When rotated, a plurality of rollers 12, 1,
2 is pressed against the cam surface 14 on the outer surface of the input side disc 2.
You. As a result, the input side disk 2
At the same time as being pressed by the power rollers 8, 8.
For meshing between the roller surfaces 13 and 14 and the plurality of rollers 12 and 12
Accordingly, the input side disk 2 rotates. And
The rotation of the input side disk 2 corresponds to the plurality of power law.
Are transmitted to the output side disk 4 via the
The output shaft 3 fixed to the force side disk 4 rotates. The rotation speed ratio (speed change) between the input shaft 1 and the output shaft 3
Ratio), first, between the input shaft 1 and the output shaft 3
When decelerating, each of the trucks should be
Swing the nonions 6, 6, the peripheral surface of each power roller 8, 8
As shown in FIG. 4, 8a and 8a are inside the input side disk 2.
The center portion of the surface 2a and the inner surface 4a of the output disk 4
Each displacement axis so that
Tilt 7,7. Conversely, when increasing the speed, the pivot
Each of the trunnions 6, 6 is swung about 5, 5,
The peripheral surfaces 8a, 8a of the power rollers 8, 8 are shown in FIG.
As shown, a portion near the outer periphery of the inner side surface 2a of the input side disk 2
And a portion near the center of the inner side surface 4a of the output side disk 4,
The respective displacement shafts 7, 7 are inclined so as to abut each other.
The inclination angle of each of the displacement shafts 7, 7 is set in the middle between FIG. 4 and FIG.
For example, an intermediate speed ratio between the input shaft 1 and the output shaft 3 is not obtained.
It is. FIGS. 6 and 7 show Japanese Utility Model Application No. 63-6929.
Microfilm No. 3 (Japanese Utility Model No. 1-173552)
More specific toroidal-type continuously variable transmission described in
Machine. Input disk 2 and output disk 4
Is a needle shaft around the input shaft 15
It is rotatably supported via receivers 16 and 16. In addition,
The plate 10 is an outer periphery of an end (the left end in FIG. 6) of the input shaft 15.
Surface, and the input side data is
Movement away from the disk 2 is prevented. So
Then, the cam plate 10 and the rollers 12
The input side disk 2 based on the rotation of the input shaft 15
Is rotated while pressing it toward the output side disc 4.
A loading cam type pressing device 9 is configured. Said out
The output gear 18 is attached to the force side disk 4 and the keys 19
The output side disk 4 and the output gear 18
Are rotated synchronously. [0010] Both ends of the pair of trunnions 6, 6 are paired.
The support plates 20, 20 are pivoted and axially oriented (as shown in FIG.
(Left and right directions in FIG. 7).
Then, a circle formed at the intermediate portion of each of the trunnions 6, 6
The displacement shafts 7, 7 are supported in the holes 23, 23. each
The displacement shafts 7, 7 are parallel to each other and eccentric
1 and 21 and pivot shaft portions 22 and 22, respectively.
Each of the support shaft portions 21, 21 is inserted into each of the circular holes 23, 2.
3, through radial needle bearings 24, 24
And rotatably supported. In addition, each of the pivot shaft portions 2
Power rollers 8, 8 around 2, 22
It is rotatably supported via dollar bearings 25, 25. The pair of displacement shafts 7, 7 are connected to the input shaft.
It is provided at a position opposite to the shaft 15 by 180 degrees. or,
Each of the pivot shaft portions 22, 22 of each of these displacement shafts 7, 7 is supported by
The direction eccentric with respect to the shafts 21
The same direction with respect to the rotation direction of both the output side discs 2 and 4
(Reverse left and right directions in FIG. 7). The eccentric direction is
As a direction substantially orthogonal to the arrangement direction of the input shaft 15
I have. Therefore, each of the power rollers 8, 8 is connected to the input shaft
It is supported so that it can be slightly displaced in the direction of disposition. This
As a result, due to the dimensional accuracy of each component,
The word rollers 8, 8 extend in the axial direction of the input shaft 15 (the left side in FIG. 6).
When it tends to be displaced to the right (front and back in Fig. 7)
However, without applying excessive force to each component, this displacement
Can be absorbed. Further, the outer surface of each of the power rollers 8, 8 and
Between the trunnions 6, 6 and the inner surface of the middle part,
Also from the outer surface side of the power rollers 8,
Thrust ball bearing 26 for supporting the word rollers 8, 8;
26 and the thrust load applied to the outer races 30, 30 described below.
Needle bearings 27, 27 for supporting
I have. Of these, the thrust ball bearings 26, 26
Supports thrust load applied to power rollers 8 and 8
And the rotation of each of these power rollers 8 is allowed.
Things. Such thrust ball bearings 26, 26
Each of the plurality of balls 29, 29 and each ball 29, 29
Annular retainers 28, 28 for rotatably holding,
Ring-shaped outer races 30, which are strike race rings.
Have been. The inner ring raceway of each thrust ball bearing 26, 26 is front
The outer raceway is provided on the outer surface of each power roller 8,
They are formed on the inner surfaces of the outer rings 30, 30, respectively. The thrust needle bearings 27, 27
Are the race 31, the cage 32, the needles 33, 33
It is composed of Of these, race 31 and cage 32
Are slightly displaceable in the direction of rotation.
You. Such thrust needle bearings 27, 27
The races 31, 31 are placed on the inner surfaces of the trunnions 6, 6, respectively.
In this state, the inner surface and the outer ring 30
It is sandwiched between the outer side. Thrust need like this
The bearings 27, 27 are located in front of the power rollers 8, 8.
The thrust load applied to each outer ring 30, 30 is supported.
The pivot shafts 22, 22 and the outer races 30, 30
Swinging around the support shafts 21, 21 is allowed
You. Further, one end of each of the trunnions 6, 6
Drive rods 36, 36 are provided on the left end of FIG.
Combine and drive to the outer peripheral surface of the middle part of each drive rod 36, 36
The pistons 37, 37 are fixed. And each of these
The drive pistons 37 are respectively connected to the drive cylinder 3
8 and 38 are fitted in an oil-tight manner. Each of these drive fix
And the drive cylinders 38, 38 respectively
Each of the trunnions 6, 6 is extended in the axial direction of the pivots 5, 5.
An actuator for displacing is configured. The toroidal type steplessly constructed as described above
During operation of the speed changer, the rotation of the input shaft 15 is
The information is transmitted to the input side disk 2. And this input side data
The rotation of the disk 2 is performed via a pair of power rollers 8, 8.
It is transmitted to the output side disk 4 and further this output side disk
4 is taken out from the output gear 18. Rotational speed between input shaft 15 and output gear 18
When changing the power ratio, the pair of drive pistons 37,
37 are displaced in opposite directions. Each of these drive fix
The pair of trunnions 6, with the displacement of the
6 are displaced in opposite directions, for example, the lower
The power roller 8 is located on the right side of FIG.
8 are displaced to the left in FIG. As a result,
The peripheral surfaces 8a, 8a of the power rollers 8, 8 and the input
Inner surfaces 2a, 4a of the side disk 2 and the output side disk 4
The direction of the tangential force acting on the abutment with
You. Then, with the change in the direction of the force,
The pivot 6, which is pivotally supported by the support plates 20, 20,
5 oscillate in mutually opposite directions. As a result,
As shown in FIGS. 4 and 5 described above, each of the power rollers 8,
8 between the peripheral surfaces 8a, 8a and the inner surfaces 2a, 4a
The position changes and the position between the input shaft 15 and the output gear 18 changes.
The rotation speed ratio changes. Incidentally, the input shaft 15 and the output gear 1 are
8 to change the rotational speed ratio between
When changing the inclination angle of 7, 7, each of these displacement axes
7, 7 are slightly centered on the respective support shafts 21, 21.
Rotate. As a result of this rotation, each of the thrust ball bearings 2
Outer surfaces of outer races 30 and 30 and trunnions 6 and 26
The inner surfaces of 6, 6 are relatively displaced. These outside and inside
Between the thrust needle bearings 27, 27
, The force required for this relative displacement is small. The outer peripheral surface of the end of each of the trunnions 6, 6
Formed arcuate surfaces 39, 39 concentric with the pivots 5, 5
are doing. And between these two arc surfaces 39, 39
The cable 40 is crossed over. still,
A part of the cable 40 is connected to each of the arc surfaces 39, 39.
Stoppers 41, 41 are provided at the corresponding portions, and these
Bull 40 and each arc surface 39, 39 are prevented from slipping.
You. Such a cable 40 is connected to the two trunnions 6, 6
Tilting (oscillating motion about each of the pivots 5, 5)
Has the role of synchronizing. And the drive rod
36, 36, drive piston 37, 37, drive cylinder 3
Actuator (hydraulic drive)
In the event of a failure of the powertrain,
Tilt in sync with. Therefore, the actuator
In the event of a failure, the input disk 2 and output disk
Direction of the plurality of power rollers 8, 8 sandwiched between them
It doesn't fall apart. As a result, each of the above disks
2 and 4, inner surfaces 2a, 4a and the circumference of each power roller 8, 8
No excessive frictional force acts between the surfaces 8a and 8a
Damage to the toroidal continuously variable transmission
Power transmission and minimum power transmission.
You. Arrangement of the cable 40 which fulfills such a function
Regarding the structure, conventionally, the above-mentioned Japanese Utility Model Application No. 63-692 is used.
Microfill of No. 93 (Japanese Utility Model Application No. 1-173552)
In addition to the structure described in Japanese Patent Application Laid-Open No. 63-67458.
, JP-A-4-327051, Japanese Utility Model Application Laid-Open No. 62-20.
No. 0852 is known. Figure
Nos. 8 and 9 are disclosed in Japanese Patent Application Laid-Open No. Hei 4-327051.
2 shows two examples of the described structure. According to FIGS.
The function of the cable 40 will be further described. The structure shown in FIGS.
7 to transmit a larger power than the structure described in 7.
Input side disk 2, 2 and output side disk
4 and 4 are provided in parallel with each other.
3 shows a bitity structure. Each input side disk 2, 2
Each output side disk 4, 4 corresponds to one disk and the second disk
Corresponding to the disk. Each set of input side disks 2, 2 and output
The first power row is located between the side disks 4 and 4 respectively.
And the power rollers 8, 8 which are the second power rollers
Each of them is provided in total of four. And each of these powers
Rollers 8 and 8 are respectively connected to the first trunnion or the second
Turn the four trunnions 6, 6
It is supported for free rotation. Axial direction (left and right direction in FIGS. 8 and 9)
Axial direction from a pair of input side disks 2 and 2 at both ends
It is transmitted to a pair of output discs 4 and 4 in the center.
The rotational power that has been applied between these two output disks 4
The connected large gear 43 and the small gear meshed with the large gear 43
It is taken out to the output shaft 45 via the gear 44. Each of the trains constituting such a structure is
At the ends of the ON 6 and 6 in the axial direction (the front and back directions in FIGS.
Pulleys 42 each being a first engagement portion or a second engagement portion,
42, and the outer peripheral surfaces of the pulleys 42, 42 are
5, 5 (see FIG. 7) are concentric arc surfaces. Soshi
And a concave groove formed on the outer peripheral surface of each of the pulleys 42, 42.
Cable 40, 40a, 40b
And synchronize the four trunnions 6 and 6
And tilt it. That is, in any structure
Are also fixed to the ends of the pair of trunnions 6, 6 constituting each set.
Between the pair of pulleys 42, 42
Hangs on the cross. Therefore,
A pair of trunnions 6 constituting each set are identical in the opposite direction.
Rotate by an angle. In addition, the pulley 4 existing at the diagonal position
2, 42 are rotatable by the same angle in the same direction. For this reason, in the structure of the first example shown in FIG.
Between the pulleys 42 located at the diagonal positions,
Only, hang the cable 40a, and
Therefore, the cable 40a is located at the diagonal position.
Pulleys 42, 42 are connected to each other. On the other hand, FIG.
In the structure of the second example, the cable 40b is connected to all pulleys.
Exists at a diagonal position instead of crossing over 42, 42
Only the pair of pulleys 42, 42 are
This cable 40b is connected. Remaining pulley
Slide plates 47, 4 are provided between 42, 42 and the cable 40b.
7, the movement of the cable 40b is
Of the pulleys 42, 42. In FIG.
In the structure shown, the cable 40b is connected to the output disk 4,
4, a toroidal type continuously variable transmission such as an outer peripheral edge of the large gear 43, etc.
Adopt to prevent interference with other members that make up
You. The cables 40, 4 serving the functions as described above
0a (or 40b), the axial direction of each of the trunnions 6, 6
For a more specific arrangement in the direction, see Japanese Utility Model Application Laid-Open No. 1-11.
No. 6246. FIGS.
1 shows a structure described in the above publication. Identical input data
Located between the disc 2 and the output disc 4 (the same key).
Tilting of the two trunnions 6, 6 (in the cavity)
Cables 40 and 40 for synchronizing the
Engage with the arcuate surfaces 39, 39 formed at the ends of the on 6, 6.
I'm making it. And each of these cables 40, 40
Between the input side disk 2 and the output side disk 4 respectively.
Has been established. On the other hand, different input side disks 2 and output side disks
Disk 4 (existing in the next cavity)
A) for synchronizing the tilting of the plurality of trunnions 6
Cable 40a is a main body portion of each of the trunnions 6, 6.
It is located in the area outside the area. That is, each of the above trunnions
Drive for connecting the drive pistons 6, 6 to the drive pistons 37, 37.
Pulleys 48, 4 are provided at intermediate portions of the moving rods 36, 36, respectively.
By fixing 8, the first and second engaging portions are configured.
The cable 40 is connected to both pulleys 48, 48.
By crossing a with a cross, the cavities next to the above
The tilting of the plurality of trunnions 6, 6 existing in the
I try to make it. The drive pistons 37, 37 are oiled
The drive cylinders 38, 38 that are closely fitted are connected to the pulleys described above.
48, 48 on the opposite side of the power rollers 8
Exist. [0025] SUMMARY OF THE INVENTION The above-described structure and operation
In the case of a conventional toroidal-type continuously variable transmission that uses
A toroidal-type continuously variable transmission while preventing vehicle interference
Things are difficult. That is, in the conventional structure as described above,
Synchronize the tilting of the trunnions 6, 6 in the cavity
Cable 40a is connected to each of the trunnions 6, 6
It is provided between the cylinders 38. Therefore,
The cable 40a is connected to each of the trunnions 6, 6 and each drive system.
The adjacent cavities are located between the cylinders 38 and 38.
It is arranged between the chiefs. However, during this time,
Gears for taking out power from the force side discs 4, 4
Seed parts are provided. Therefore, depending on the conditions,
Where the cable 40a cannot be installed
It is difficult to design a toroidal-type continuously variable transmission.
In some cases. In the conventional structure, the cable 40a and other parts
To prevent the interference with the cable 40a
To do so, for example, the trunnions 6, 6 and the drive cylinder
38, 38, the cable 40a
The axial direction of the drive rods 36, 36 in the space where the
It is conceivable to increase the degree of freedom
It is. However, if such a structure is adopted,
Drive cylinders 38 with large dimensions are input side and output side
Since it is located at a position away from both disks 2 and 4,
The external dimensions of the idal type continuously variable transmission have increased,
It cannot be installed in a limited space such as under the floor. The present invention
In consideration of these circumstances, we invented the royal type continuously variable transmission.
Things. [0027] Means for Solving the Problems The toroidal type stepless of the present invention
The transmission is the same as the conventional toroidal-type continuously variable transmission described above.
And concentric with each other, with the inner surfaces facing each other
And a pair of first rotatably supported rotatably in synchronization with each other.
One disc and the inner surface of each disc
Arranged concentrically with the first disk with the side facing
And a pair of second disks rotating in synchronization with each other,
Between the first and second disks on one side
In a twisted position with respect to the center axis of both discs
The first trunnion swinging about the first axis and this
A first displacement axis protruding from the inner surface of the first trunnion;
While being rotatably supported around the first displacement axis of
The inner surfaces of the first disk and the second disk on one side
The first power roller sandwiched between the
First displacing the nonion in the axial direction of the first pivot;
Actuator and first and second disks on the other side
The disc is provided between the disc and the center axis of both discs.
The second that swings around the second pivot in the twisted position
Trunnion and projecting from the inner surface of this second trunnion
A second displacement axis and a rotatable support around the second displacement axis.
With the first disk and the second disk on the other side
The second power row clamped between the inner surfaces with the disk
And the second trunnion in the axial direction of the second pivot.
A second actuator for displacing the first
On the first engaging portion and the second trunnion.
To the specified second engagement partPart of circumferential directionAnd combine
Mutually regulate the swing of these first and second trunnions
EndlessWith cable. In particular, the toroidal type continuously variable transmission of the present invention
In this case, a first lock having its proximal end connected to the first axis
The first actuator in the middle of the
The first engagement portion is provided at the tip of the
In the middle part of the second rod whose base end is connected to the two pivots,
A second actuator is attached to the tip of the second rod.
Second engagement portions are provided, respectively. [0029] According to the present invention, there is provided a toroidal type antenna having the above-described structure.
The step transmission is the same as the conventional toroidal-type continuously variable transmission described above.
Based on the same action, the first disc and the second disc
Transmission of rotational force between the trunnions and the tilt angle of the trunnion
By changing the rotation speed ratio of these two disks
You. In addition, multiple trunnions can be synchronized and tilted with a cable.
Is fatal even if the actuator fails
No failures and minimum power transmission
Wear. In particular, the toroidal type continuously variable transmission of the present invention
In some cases, support the power rollers in adjacent cavities
Cable for synchronizing the tilting of the trunnions
A large distance in the diametric direction from both the first and second discs
Can be placed. Because of this, this cable interferes with other parts
Making it easier to design a toroidal-type continuously variable transmission.
Become. The outer diameter of the first and second engaging portions is the first and second.
Since it is smaller than the outer diameter of the two actuators,
From the first and second discs
Position of the toroidal type continuously variable transmission
A design that does not increase the modulus is possible. [0031] 1 and 2 show a first embodiment of the present invention.
You. Both ends of the input shaft 49 driven to rotate by the pressing device 9
Section has a pair of input side data, each of which is the first disk.
The discs 2 and 2 face each other on their inner surfaces 2a and 2a.
Through the ball splines 50 and 50, respectively.
And wear it. Therefore, these two input side disks 2,
2 rotate concentrically with each other and synchronously with each other. Further, around the intermediate portion of the input shaft 49, there is a slot.
The shaft 51 is rotatably supported with respect to the input shaft 49.
ing. And the axial direction of this sleeve 51 (left and right in FIG. 1)
Direction) At both ends, output side data
The disks 4, 4 are supported via spline engagement portions.
You. Therefore, these two output side disks 4 and 4
It is arranged concentrically with the force side discs 2 and 2. Also this
Therefore, the two output disks 4 rotate in synchronization with each other.
Also, the inner surfaces 4a, 4a of the output disks 4, 4
Are located on the inner side surfaces 2a, 2a of the input side disks 2, 2.
Facing each other. As described above, in the axial direction (the horizontal direction in FIG. 2)
Input disks 2, 2 and output provided two by two
Between the side disks 4, 4, trunnions 6, 6, respectively
Is provided. Each of these trunnions 6, 6
The discs 2 and 4 are twisted with respect to the central axis.
It swings around the pivots 5,5. In addition, each of these trani
Around the displacement shafts 7, 7 protruding from the inner surface of the on 6, 6
The power rollers 8, 8 rotatably supported by the input side
Inner surfaces 2a, 4a of the disk 2 and the output side disk 4
It is sandwiched between. In addition, the trunnions 6
One end of the drive rods 36, 36 (the upper end in FIG. 1)
) Are connected to each other, and the drive rods 36
Drive pistons 37, 37 fixed at the intermediate portion are
Oil-tightly fitted in the cylinders 38, 38. Each of these trunnions 6, 6, pivot 5,
5, one of the displacement shafts 7 and 7 and the power rollers 8 and 8
Input disk 2 and output disk on the side (left side in FIG. 2)
4, each member 6, 5, 7, 8 provided between the
Corresponding to the "first ~", the other side (right of FIG. 2)
Side) between the input disk 2 and the output disk 4.
Each of the members 6, 5, 7, and 8 that have been shaken are described in the claims.
Corresponds to "second ~". Also, the trunnion on one side
6 corresponds to the first rod,
A driving piston 37 fixed to the rod 36 and the driving piston 37
The drive cylinder 38 fitted with the stone 37 is the first activator.
, Respectively. Furthermore, the other side
The driving rod 36 corresponding to the trunnion 6 is a second rod.
The drive piston 37 fixed to the drive rod 36
And a drive cylinder 38 fitted with the drive piston 37.
Correspond to the second actuator, respectively. Trunnions in the same cavity
Cross the cables 40, 40 between 6, 6
And synchronize the tilting of these trunnions 6, 6
ing. That is, these cables 40, 40 are as described above.
In the same manner as in the case of the conventional structure described above,
These are extended over the arc surfaces 39, 39 formed at the ends.
So that each trunnion 6, 6 tilts by the same angle in the opposite direction
are doing. Further, the tip of each of the driving rods 36, 36
A fixed plate incorporating the above-mentioned drive cylinders 38, 38
Each of the portions protruding from the portion 52 has a first engagement portion or
Fix the pulleys 48a, 48a corresponding to the second engagement portions.
ing. Then, the adjacent cavities make these pools
Between the cables 48a, 48a.
Is crossed over. The toroidal of the present invention configured as described above
Type continuously variable transmission is the conventional toroidal type continuously variable transmission
Based on the same operation as the
Between the discs 2 and 2 and the output discs 4 and 4
Communicate. Also, the angle of inclination of each trunnion 6, 6 is the same.
The rotation speed between these two disks 2 and 4
Change the power ratio. Also, these cables 40 and 40c
By tilting each trunnion 6, 6 synchronously,
Even if the actuator fails, a fatal failure may occur.
Minimum power transmission can be ensured. In particular, the toroidal type continuously variable transmission of the present invention
In such a case, the power rollers 8, 8 in adjacent cavities are used.
To synchronize the tilting of the trunnions 6, 6
Cables 40c, 40c of the input side and output side
It can be arranged far away from the disks 2, 4 in the diametric direction.
For this reason, each of these cables 40c, 40c and other parts
Is less likely to interfere with the design of the toroidal type continuously variable transmission.
It will be easier. That is, each of the cables 40c, 40c
Middle part(Part of the circumferential direction)The drive rod 3
Outer diameter of pulleys 48a, 48a fixed to the ends of 6, 36
The dimensions areDrive rodProvided in the middle of 36, 36
It is smaller than the outer diameter of the drive cylinders 38, 38.
Therefore, these pulleys 48a, 48a are connected to the input side,
Even if it is arranged at a position away from both output side disks 2 and 4,
Design that does not increase the external dimensions of toroidal type continuously variable transmission
Is possible.That is, referring to the description of FIG.
As is apparent, the outer diameter of each of the pulleys 48a, 48a
, The pulleys 48a, 48a are covered.
The outer dimensions of the cover can be reduced, and the toroidal-type continuously variable transmission
A design that does not increase the external dimensions of the machine becomes possible. Next, FIG. 3 shows a second embodiment of the present invention.
I have. In the case of the present embodiment, three
Double cavity type toro with power rollers 8 and 8
The present invention is applied to an idal type continuously variable transmission. Obedience
In the case of this structure, the power rollers 8, 8 and
On 6, 6 means two sets of three each, a total of six
You. The feature of the present invention is that
It has a feature in the structure that synchronizes the tilt of the ON 6,6
Therefore, FIG. 3 shows the inclination of the trunnions 6, 6 in the same cavity.
The mechanism for synchronizing the movement is omitted. Tranio provided three in each cavity
One of the trunnions 6, 6
Drive each base end to the middle of the fixed drive rod 36.
Actuator comprising a dynamic piston 37 and a drive cylinder 38
Eta is provided. Then, the tip of the drive rod 36
A pulley 48a is fixed to the end, and between the pulleys 48a.
The cable 40c is crossed over by crossing. This
Therefore, as in the case of the first embodiment described above,
Design that does not increase the external dimensions of
You. [0041] The toroidal type continuously variable transmission according to the present invention has the following features.
As described above, the external dimensions are large
Without the need for cable installation.
To facilitate the design of toroidal-type continuously variable transmissions
You.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a partial sectional view showing a first embodiment of the present invention. FIG. 2 is a sectional view taken along line AA of FIG. FIG. 3 is a sectional view showing a second embodiment of the present invention. FIG. 4 is a side view showing a basic configuration of a conventionally known toroidal-type continuously variable transmission in a state of maximum deceleration. FIG. 5 is a side view showing a state at the time of maximum speed increase. FIG. 6 is a sectional view showing a first example of a conventional specific structure. FIG. 7 is a sectional view taken along line BB of FIG. 6; FIG. 8 is a cross-sectional view showing a first example of an arrangement portion of a conventionally known cable. FIG. 9 is a sectional view showing the second example. FIG. 10 is a sectional view showing the third example. FIG. 11 is a sectional view taken along the line CC of FIG. 10; [Description of Signs] 1 Input shaft 2 Input disk (first disk) 2a Inner surface 3 Output shaft 4 Output disk (second disk) 4a Inner surface 5 Pivot 6 Trunnion 7 Displacement shaft 8 Power roller 8a Peripheral surface 9 Pressing Device 10 Cam plate 11 Cage 12 Rollers 13, 14 Cam surface 15 Input shaft 16 Needle bearing 17 Flange 18 Output gear 19 Key 20 Support plate 21 Support shaft 22 Pivot shaft 23 Round holes 24, 25 Radial needle bearing 26 Thrust ball bearing 27 Thrust needle bearing 28 Cage 29 Ball 30 Outer ring 31 Race 32 Cage 33 Needle 36 Drive rod 37 Drive piston 38 Drive cylinder 39 Arc surfaces 40, 40a, 40b, 40c Cable 41 Stopper 42 Pulley 43 Large gear 44 Small gear 45 Output shaft 46 Stopper 47 Sliding plate 48, 48a Pulley 49 Input shaft 0 ball spline 51 sleeve 52 fixed plate portion

Claims (1)

(57) [Claims 1] With the inner surfaces facing each other,
A pair of first disks supported concentrically and rotatably in synchronization with each other, and arranged concentrically with the first disks with their inner surfaces facing the inner surfaces of each of the first disks. A pair of second disks rotating in synchronism with each other, and a first pivot provided between the first disk and the second disk on one side and in a twisted position with respect to the central axis of the two disks. A first trunnion that oscillates as a center, a first displacement shaft protruding from an inner surface of the first trunnion, and a first displacement shaft protruding from the inner surface of the first trunnion; A first power roller sandwiched between inner surfaces of the disk and the second disk, a first actuator for displacing the first trunnion in the axial direction of the first pivot, and a first actuator on the other side. One disk and the second disk A second trunnion provided between the two discs and swinging about a second pivot which is in a twisted position with respect to the central axes of the two discs; a second displacement axis protruding from an inner surface of the second trunnion; In a state supported rotatably around the two displacement shafts, the second power roller sandwiched between inner surfaces of the first disk and the second disk on the other side, and the second trunnion A second actuator displaced in the axial direction of the second pivot, a first engagement portion fixed to the first trunnion, and a second engagement portion fixed to the second trunnion in the circumferential direction. by combining parts, these first, in the toroidal type continuously variable transmission having a endless cable for regulating the swing of the second double trunnion mutually coupling the base end to the first pivot Above the first rod Eta, the first engaging portion on the tip portion of the first rod, respectively,
A toroidal type wherein the second actuator is provided at an intermediate portion of a second rod having a proximal end coupled to the second pivot, and the second engagement portion is provided at a distal end of the second rod. Continuously variable transmission.