JP2003214516A - Toroidal speed change mechanism - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a power roller from being dislocated from a trunnion member and also to improve the strength and rigidity of the whole of a trunnion assembly. <P>SOLUTION: The trunnion assembly 150 nipped between input and output discs 110 and 210 consists of the power roller 153 and the trunnion member 151. The trunnion member 151 consists of: a pair of bearing parts 152 oscillatorily supported at two ends in the direction of an oscillating shaft; a support part having a support plane 151c, rotatably supporting the power roller formed by integrally interconnecting the bearing parts, and a support side 151d; and a reinforcing member 157 mounted nipping the power roller, supported at a support part, and with the two ends of the support part intercoupled. A recessed part 153b and a protrusion part 157a are formed respectively in and on the opposed surfaces of the power roller 153 and the reinforcing member 157, and by loosely fitting the protrusion part and the recessed part in each other, the power roller is held at the support part between the support part and the reinforcing member with relative movement of the power roller by a given amount in a direction extending at right angles with its rotation axis. <P>COPYRIGHT: (C)2003,JPO

Description

DETAILED DESCRIPTION OF THE INVENTION [0001] BACKGROUND OF THE INVENTION The present invention relates to
An input disk and a counter-rotating input disk
Of the trunnion assembly between the motor and the output disc
The present invention relates to a toroidal transmission mechanism configured to be sandwiched between the transmissions. [0002] 2. Description of the Related Art In such a toroidal transmission mechanism,
The trunnion assembly is
A power roller sandwiched between
It is rotatably supported and is directly
Trunnion part that can swing about the swing axis in the angular direction
Material and the trunnion member swings
Check the radial position of contact between the power roller and the input / output disk.
Change the speed of the input disk in a stepless
It is configured to perform control for transmitting to the disk. This
A toroidal transmission mechanism with a configuration like
For example, Japanese Patent Application Laid-Open No. 7-198014,
001-227611, JP-A-2001-3043
No. 66 and the like. Here, the continuously variable transmission control is performed as described above.
To do this, it is necessary to control the swinging of the trunnion member.
is there. This pushes the trunnion member in the direction of its pivot axis.
At this time, the trunnion member
Is slightly moved in the direction of the pivot axis.
Roller can move slightly relative to the axis of rotation.
It is required to be configured so that This relative
In order to allow movement, JP-A-7-198014,
JP-A-2001-227611 (particularly, see FIG. 3)
In the toroidal transmission mechanism disclosed in
To the trunnion member via linear bearings.
It has a configuration to hold. In addition, Japanese Patent Application Laid-Open No. 2001-30
In the toroidal transmission mechanism disclosed in Japanese Patent No. 4366
Is a rotating support shaft (tip) that rotatably supports the power roller.
The oscillating support shaft (base) integral with and eccentric to this half 9b)
Half 9a) is provided, and the swing support shaft is provided by a trunnion member.
Rotatably supported, rotatably supported by a rotating support shaft
Oscillated power roller around the oscillating support shaft
The structure which allows the relative movement is adopted. In addition,
Japanese Unexamined Patent Publication No. 2001-304366 discloses a toroidal modification.
In the speed mechanism, both sides of the trunnion member in the swing axis direction
A connecting member that connects the power rollers is attached.
Thus, the trunnion member is reinforced. [0004] However, the power law
To the trunnion member via a linear bearing
In the case of a support structure, the power roller is
And pressed against the trunnion member
As a toroidal transmission mechanism.
When the roller is in the
Although it is securely supported by the trunnion member via the ring,
Before the trunnion assembly is assembled,
The power roller is in a state of falling off the trunnion member
You. For this reason, the assembly work of the trunnion assembly is
There is a problem that it is very difficult. On the other hand, Japanese Patent Application Laid-Open No. 2001-304366
Power roller, like the toroidal transmission mechanism disclosed in
The swing support shaft that is integral with the rotatable support shaft
In the case of a configuration supported rotatably by a runion member
Attaches the power roller to the rotation support shaft so that it can rotate freely.
And the swing support shaft is rotatably mounted on the trunnion member.
Power roller from the trunnion
There is no problem of falling off. However, rotation support
Power to support the power roller rotatably by the shaft
It is necessary to form a shaft hole to insert the rotation support shaft into the roller
The strength and rigidity of the power roller will decrease.
Problem. Also, rotate the swing support shaft around the trunnion member.
Swing support shaft on trunnion member for rotatable mounting
Must be formed in the shaft hole
There is a problem that the strength and rigidity of the component members decrease. The present invention has been made in view of such a problem.
When the power roller is
There is no danger of falling off from the
To increase the strength and rigidity of the entire on-assembly
To provide a toroidal transmission mechanism having a
aimed to. [0007] SUMMARY OF THE INVENTION In order to achieve the above object,
Therefore, in the present invention, it is relatively rotatable on the same rotation axis.
And an input disk (for example, an embodiment)
And second input disks 110, 21 in the standby state
0) and an output disk (for example,
Between the first and second output disks 120, 220).
A torro that is configured to pinch the
In an idal transmission, a trunnion assembly (eg,
For example, first to fourth trunnion assemblies in the embodiment
150, 160, 250, 260)
Power roller and an input / output disk
Swinging in a plane perpendicular to the same axis of rotation
It consists of a trunnion member that can swing on the drive shaft.
Then, the trunnion member is pivoted at both ends in the pivot axis direction.
And a pair of bearings supported
It is formed by connecting to the body and the power roller can rotate freely.
(For example, the support plane in the embodiment)
151c and a supporting side surface 151d), and
Connect the two ends of the support section with the power roller
And a reinforcing member attached thereto. And power
Of the roller and the reinforcing member facing each other
A convex portion is formed on one side and a concave portion is formed on the other side.
Loosely fit the protrusions and recesses to provide power to the support
Move the roller a specified amount in the direction perpendicular to its axis of rotation.
Hold it between the support and the reinforcing member in an allowed state.
Is configured. [0008] The toroidal according to the present invention having such a configuration.
According to the speed change mechanism, the power roller and the reinforcing member
The loose fitting of the convex and concave parts formed on the surface facing
Since the power roller is held by the trunnion member,
The power roller is trunnioned with the non-ion assembly alone
There is no danger of falling off the component. This allows power
Roller to linear bearing for trunnion member
Even if a configuration that supports more is adopted, the trunnion assembly
The assembling work does not become difficult. Also like this
By adopting a linear bearing support structure
Shaft hole for inserting the swing shaft into the trunnion member.
No need to be formed, increasing the strength and rigidity of the trunnion member
Can be [0009] The angular bearing on the linear bearing
Power roller is rotatably supported via ball bearings
It is possible to adopt a configuration that has
If formed, a shaft hole for inserting the rotating shaft into the power roller
No need to form, the strength and rigidity of the power roller
Can be increased. [0010] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described.
Will be described with reference to the drawings. Toro according to the present invention
Power transmission of a continuously variable transmission configured with an idal transmission mechanism
FIG. 1 shows the route configuration. This continuously variable transmission is
An engine as a driving source via a damper MD (illustrated
Transmission input shaft 20 connected to the output shaft
That is transmitted to the transmission input shaft 20
The rotational drive force of the motor is changed and transmitted to the output side (for example, drive wheels).
Reach. The transmission input shaft 20 is a toroidal continuously variable transmission
Connected to the mechanism CVT and power via the belt mechanism BM
Connects to the transmission mechanism TM. In addition, toroidal stepless transmission
The output gear of the CVT is connected to the power transmission mechanism TM,
Output rotational driving force and belt of dull continuously variable transmission mechanism CVT
The rotational driving force transmitted by the mechanism BM is the power transmission mechanism T
M and are transmitted to the final reduction gear FD,
To be transmitted from the FD to the left and right drive wheels (not shown)
It is configured. First, a toroidal continuously variable transmission mechanism CVT is described.
Will be described. The continuously variable transmission CVT is shown in detail in FIG.
As shown on the transmission input shaft 20 in parallel.
First and second toroidal transmission units 10 provided
0,200. That is, the continuously variable transmission mechanism CV
T is from a double-cavity toroidal continuously variable transmission
Be composed. The first and second toroidal transmission units
Since the units 100 and 200 have the same configuration,
The components are indicated by numbers with the same last two digits.
ing. [0012] The first toroidal transmission unit 100 is turned off.
Has a semi-donut-shaped inner surface 110a having a semi-circular surface
The first input disk 110 and the inner surface 110a
Half dough that faces in the axial direction and has a semicircular cross section
First output disk 12 having a nut-like inner surface 120a
0, first input and first output disks 110, 120
Cavity 1 surrounded by inner surfaces 110a and 120a of
30 and are in contact with these inner surfaces 110a and 120a.
A pair of first and second trunnions held in contact with each other
Assembly 150, 160. In addition,
These trunnion assemblies 150 and 160 (however,
2 is different from that in FIG.
Only the yellowtail 150 is shown) on both disks 110, 1
Positions facing each other across the rotation axis of 20, that is, the rotation axis
It is arranged at a position symmetrical with respect to. The first input disk 110 and the first output disk
Disk 120 is identical to this on transmission input shaft 20.
A first input disk disposed opposite to the shaft,
110 is formed integrally with the transmission input shaft 20.
And rotate together with it. On the other hand, the first output disk 12
0 is disposed on the transmission input shaft 20 so as to be relatively rotatable.
The first output disk 120 is provided on the outer periphery of the first output disk 120.
A gear 121 is formed. The second toroidal transmission unit 200 is
Axial left / right pair with respect to one toroidal transmission unit 100
And a semi-doughnut-shaped inner surface 21
0a and the inner surface 21
Opposite to 0a in the axial direction and semi-donut-like
A second output disk 220 having an inner surface 220a of
Second cavity surrounded by inner surfaces 210a and 220a
A pair of third and fourth trunnions clamped within 230
It is composed of assemblies 250 and 260. Both discs
The shafts 210 and 220 are mounted on the transmission input shaft 20.
Are arranged coaxially with each other and opposite to each other.
The screw 210 is connected to the transmission input shaft 20 and
And rotate together. On the other hand, the second output disc 220
Relatively rotatably disposed on the machine input shaft 20, and
It is connected to the first output disk 120 and rotates integrally. What
Note that the first output disk is provided around the outer periphery of the second output disk 220.
A second output disk gear 221 having the same number of teeth as the gear 121 is provided.
It is composed of a mountain gear. The side opposite to the input side of the transmission input shaft 20
Pressing piston 215 is attached to the end (left end in FIG. 2)
The pressing piston 215 is connected to the second input
In the cylinder part 210a formed at the end of the disc 210
It is fitted slidably in the axial direction. For this reason, the transmission
Cylinder 21 through oil passage hole in input shaft 20
Hydraulic piston by applying loading hydraulic pressure within 0a
215 to the right (second out)
Force disk 220). here
Thus, as shown in FIG.
And formed integrally with the machine input shaft 20, while the
Two-input disk 210 and first and second output disks 1
20 and 220 are on the transmission input shaft 20 respectively.
Is mounted movably in the axial direction. For this reason,
As described above, the loading oil in the cylinder 210a
Under the pressure, the second input disk 210 is pressed rightward.
Then, with the axial force corresponding to this pressing force, the first input / output
First and second trunnions between the disks 110 and 120
Between the input and output assemblies 150 and 160 and the second input / output
Third and fourth trunnion doors between the disks 210 and 220
The assemblies 250 and 260 are sandwiched. The toroidal continuously variable transmission mechanism having such a configuration.
The shift operation in the CVT is performed by the first to fourth trunnion assemblies.
Assembly 150, 160, 250, 260
Centering on the pivot axis O1 (the axis extending perpendicular to the plane of FIG. 2)
It is performed by tilting and swinging. The structure is shown by the arrow in FIG.
Referring to FIG. 3, which is a cross-sectional view along the line III-III, the first toro
The idal transmission unit 100 will be described. In addition,
The basic structure of the two-toroidal transmission unit 200 is the first
Since it is the same as the idal transmission unit 100,
Basically, the first toroidal transmission unit 100
In the second toroidal unit 200, a representative explanation will be given.
Description is omitted. 1st toroidal transmission unit 100
First and second trunnion assemblies 150, 16
0 is the rotation center axis of the transmission input shaft 20 (first input and
And the rotation center axes of the first output disks 110 and 120
) Are symmetrically placed with respect to each other. First
And the second trunnion assemblies 150, 160
And trunnion supported by second support members 30 and 40
It has members 151 and 161. Trunnion member 151,
161 are the horizontal directions in FIG.
(Y direction) swinging movement is possible. Also, trunnion part
Materials 151 and 161 are provided with left and right trunnion bearings 152 and
At 152 and 162, 162, respectively
Ring 152a, 152a and 162a, 162a.
And supported by both support members 30, 40,
Centering on the tilting and swinging axis O1 with respect to the second support members 30 and 40
It is possible to tilt and swing. At the end of each trunnion member 151, 161
Is the piston 1 through the drive rods 151b and 161b.
51a and 161a are connected, and the piston portion 151
a, 161a and the hydraulic cylinder mechanism 145, 1
46 are configured. Hydraulic cylinder mechanism 145, 14
6 are operated in response to the control oil pressure, and the piston parts 151a,
161a is pressed in the axial direction (y direction).
The trunnion members 151 and 161 are driven by this pressing force.
In the axial direction (y direction) via rods 151b and 161b
It is configured to be pressed and moved. The first and second tokens configured as described above
The runner assemblies 150 and 160 have the same configuration.
FIG. 4 shows the first trunnion assembly 150 as a representative.
And the first trunnion assembly based on this drawing.
The configuration of the rim 150 will be described. However, the second trunnion case
Assembly 160, and third and fourth trunnion assemblies
250 and 260, the first trunnion assembly 1
Since they have the same configuration as 50, their description is omitted. The first trunnion assembly 150 includes
Trunnion bearing 152, 1 of trunnion member 151
Between 52 and eccentric from the swing axis O1
Support surface 151c extending in the axial direction of the support plane 151c
It extends perpendicular to the end and perpendicular to the pivot axis O1.
The supporting portion consisting of the supporting side surfaces 151d, 151d
Has been established. This support is taken along the arrow VV in FIG.
A cross section is shown in FIG.
Ring 155 is provided. Linear bearing 155
Has a large number of first needle rollers 156a whose axes are in the y direction.
Rotate by plane cage part 155a so as to extend in the direction
While holding freely, both ends of the flat cage portion 155a
Side cage part 155b, 1 bent at right angle
55b, a large number of second needle rollers 156 are provided.
b so that its axis extends in the z direction (the direction perpendicular to the paper surface).
The first needle row
56a abuts on the support plane 151c and the second need
Roller 56b is brought into contact with the support side surface 151d.
It is arranged. As shown in FIG. 4, this linear bearing
155 has an angular ball bearing 154
Is installed, and an angular ball bearing 1
The power roller 153 is disposed on the power supply 54. Ann
The race member of the gular ball bearing 154 is linear
Formed into a rectangular shape that matches the internal shape of the bearing 155
The lower surface of the first roller bearing 156a
On both sides, and both side surfaces of the second roller bearing 151
abuts with d. Because of this, angular balls
The bearing 154 has a linear bearing on the support plane 151c.
Supported by the ring 155, shown in FIGS.
It is movable in the x direction and the movement is restricted in the y direction.
State. Note that, as shown in FIG.
A rectangular opening 155 is formed in the flat cage portion 155a.
c is formed and the angular ball bearing 154
The rectangular projection 154b formed on the lower surface of the race member
Projecting into the opening 155c. The angular ball bearing 154
The upper surface of the base member extends perpendicular to the support plane 151c.
Arranged in a circular shape around the rotation center axis O2,
A ball 154a is rotatably mounted.
A power roller 153 is provided above. For this reason,
Power roller 153 is an angular ball bearing 1
54 makes it possible to freely rotate around the rotation center axis O2.
Be held. As a result, the power roller 153
Movable in the x direction and the y direction
Is configured to rotate around the rotation center axis O2.
It is supported. In addition, on the upper surface of the power roller 153,
A spherical contact surface 153a is formed, and the first input / output
First trunnion assembly 1 is attached to disks 110 and 120
When the pin 50 is clamped, the contact surface 153a
The inner surfaces 110a, 120a of the disks 110, 120
Touch Both ends of the support portion of the trunnion member 151 are supported.
The connection protrusion 151 extends perpendicular to the holding plane 151c.
e, 151e are formed. And these connecting bumps
In addition to connecting the starting points 151e, 151e,
Linear bearings 155 and angular ball bearings
A power row disposed on the support via the ring 154
The reinforcing member 157 is covered with the bolt 158 to cover the
It is attached as shown. Here, FIG.
As can be clearly understood from FIG. 6, the contact of the power roller 153
A circular concave portion 1 is formed in a flat portion formed in the center of the surface 153a.
53b are formed. On the other hand, the lower surface of the reinforcing member 157
(A surface facing the power roller 153) has a substantially elliptical convex shape.
A portion 157a is formed, and the projection 157a is
Roller 153 projecting into the recess 153b and loosely fitted.
I have. The power roller 153 and the reinforcing member 157 are
Close. As a result, the reinforcing member 157 and the trunnion portion
A linear bearing 155 and an
Arranged on the support part via the gulular ball bearing 154
The power roller 153 is gently pinched
It is retained and does not fall off. In addition, the convex portion 1
57a is an elliptical shape that is long in the y direction and short in the x direction,
While loosely fitted in the circular concave portion 153b, the reinforcing portion
Power to material 157 (and trunnion member 151)
Roller 153 is relatively movable to some extent in the x direction.
The movement by the linear bearing 155 described above is
Only the gap between 157a and recess 153b is allowed. Ma
Further, the power loss is achieved by the covering portion 157b of the reinforcing member 157.
Roller 153 has a spherical contact surface 153a that is gently clamped.
Is also held. That is, for the reinforcing member 157,
Relative movement of the power roller 153 in the x direction
7a and the concave portion 153b and the cover portion 157b.
To the smaller of the gap with the spherical contact surface 153a
Corresponding and acceptable. Note that, for the y direction,
Relative movement is possible, but linear bearings as described above
At 155, movement is regulated. The first toroidal transmission unit having the above configuration
100, the hydraulic cylinder mechanism 145, 1
46 pushes the trunnion members 151 and 161 in the y direction.
When pressure is moved, input and output with power rollers 153 and 163
Rotation of the two at the point of contact with the disks 110 and 120
A difference occurs in the speed direction, and the direction of the rotation speed
Is generated in the tilting and swinging direction, and the trunnion member 15
1, 161 is tilted and swung about the tilt and swing axis O1.
You. At this time, the linear bearing 155
The word roller 153 moves in the x direction and is automatically aligned.
As a result, the power rollers 153 and 163 input and output.
Inner surface 1 while being sandwiched between force disks 110 and 120
10a, 120a, tilting and swinging, that is, FIG.
Tilt and swing around the tilt and swing axis O1 in the plane
You. In this case, the hydraulic cylinder mechanism 14
5,146, the trunnion members 151, 161 are set in the y direction.
The amount of movement required when moving in the pressing direction is small,
As long as the pressing force is maintained, the trunnion members 151, 16
1 can be continuously tilted and swung. As described above, the hydraulic cylinder mechanism 145,
146 moves the trunnion members 151 and 161 in the y direction.
Power rollers 153, 163
Between the input and output disks 110 and 120
Tilt and swing along its inner surfaces 110a, 120a
Then, power rollers 153 and 163 and the input disk
110 and the position of the contact point with the output disc 120
The position of the contact point fluctuates. As a result, the transmission input
20 is rotated and the input disk 110 is driven to rotate
Rotate via power rollers 153 and 163 when
The rotation speed of the output disk 120 to be
It changes steplessly according to the tilting and swinging movement of 53 and 163. As described above, the power rollers 153 and 163
From the input disk 110 to the output disk 120 via
When the rotational drive force is transmitted at a variable speed, the power roller 1
The force acting on 53,163 is applied to the first trunnion assembly.
This will be described with reference to FIGS.
Power roller 153 is attached to input / output disks 110 and 120
Diagram of external force when contact points at points A and B when sandwiched
And between the input / output disks 110 and 120.
Due to the holding force, these contact points A and B face the contact surface 153a.
The load perpendicular to the normal direction acts, its y direction and
Arrow a in the z-direction component_y, B_yAnd arrow a_z, B_zShown as
are doing. This pinching force acts in the direction of the transmission input shaft.
And has no x-direction component. However, this
The input power is
The torque from the disk 110 is transmitted to the output disk 120.
Traction corresponding to the frictional force between the contact points A and B
Tangential direction (x direction) load a_x, B_xThe powerlo
Roller 153 is received at the contact points A and B. As a result, the contact points A and B respectively have arrows
Force a shown by mark_x, A_y, A_zResultant force and force b_x, B_y, B_z
The resultant force indicated by the thick arrow in FIGS. 7 and 8 is
a and b act on the power roller 153. And
The bullet of the power roller 153 that has received such resultant forces a and b
The sexual deformation is exaggerated in FIG.
Elastically deformed. However, as described above, the pattern of the present embodiment is
The word roller 153 is used for inserting a rotating shaft as in the related art.
Solid shape without shaft hole for strength and composite
It is high, and the amount of elastic deformation can be kept small. FIG. 9 shows the resultant force c obtained by combining the resultant forces a and b.
As indicated by the bold arrow, the power roller 153
The resultant force c acting on the angular ball bearing 15
4 and the trunnion via the linear bearing 155
It is supported by the material 151. This resultant force C is
The direction is slightly inclined with respect to the swing axis O2, and the thrust force is generated.
Angular ball bearing 1
54, and the power roller 153 can rotate freely.
Can be supported without any problems. As can be seen from the above description, toroidal
In the continuously variable transmission mechanism CVT, the first to fourth trunnion doors
Tilt and swing control of assemblies 150, 160, 250, 260
The continuously variable transmission control is performed by control. In this way,
The speed of the input shaft 20 is continuously variable and the output
Is transmitted to the disks 120 and 220.
The first and the second formed on the outer circumference of the disks 120 and 220
The second output disk gears 121 and 221 are connected to the power transmission mechanism T
The first rotating gear meshed with the first gear 71 constituting the M
Power is transmitted to power transmission mechanism TM. The power transmission mechanism TM can be clearly understood from FIG.
As shown in FIG.
1st to 7th counter shafts CS1 to CS7 and these
First to ninth gears 71 disposed on the counter shaft
~ 79, IVT clutch 65, torque split clutch
The latch 66, the direct clutch 87, the speed change planet
And a tally gear mechanism 80. 1st counter
First and second gears 71 and 72 are fixed to the shaft CS1.
The first gear 71 is connected to the first and second output gears 1.
21 and 221 (see FIG. 2). 2nd counter
An eighth gear (final reduction drive gear) 78 is provided on the shaft CS2.
It is fixed and one end of the direct clutch 87
It is connected to the lumber. Note that one of the direct clutches 87
The end side member includes a gear constituting the speed change planetary gear mechanism 80.
Gear 84 is provided. The third counter shaft CS3 is connected to the second cow
Is arranged on the shaft CS2 so as to be relatively rotatable.
I have. A second gear 72 is provided on the third counter shaft CS3.
Third gear 73 and transmission planetary gear mechanism 80
Is fixedly mounted, and a direct
The other end of the clutch 87 is connected. direct
The clutch 87 allows the one end member and the other end member to be freely disengageable.
The direct clutch 87
Of the second and third counter shafts CS2 and CS3
Is controlled. The fourth counter shaft CS4 is a third cow.
Is arranged on the shaft CS3 so as to be relatively rotatable.
I have. A fourth gear 74 is provided on the fourth counter shaft CS4.
And a sixth gear 76 are fixedly mounted, and
A carrier 82 that constitutes a gear mechanism 80 is attached.
ing. A pinion gear 83 rotates on the carrier 82.
The pinion gear 83 is freely held, and the sun gear 81 and the sun gear 81
And the ring gear 84 as shown in the figure. That is,
The transmission planetary gear mechanism 80 is a single pinion type
Of planetary gears. The fifth countershaft CS5 has a sixth gear.
A seventh gear 77 meshing with the gear 76 is fixedly provided.
The sixth and seventh cameras are mounted on the fifth counter shaft CS5.
The counter shafts CCS6 and CS7 are in parallel and each
It is arranged rotatably. 6th counter shaft
A fifth gear 75 meshing with the fourth gear 74 is fixed to CS6.
Have been. The seventh counter shaft CS7 has a belt
The driven sprocket 63 constituting the mechanism BM is fixedly mounted.
I have. Further, the IVT clutch 65 and the torque spring
An IVT clutch 6 is provided.
5, the sixth and seventh countershafts CS6, C
The engagement / disengagement control of S7 is performed, and the torque split clutch 6
6, the fifth and seventh counter shafts CS5, C
The engagement / disengagement control of S7 is performed. On the other hand, a driving switch is provided on the side of the input disk 110.
The drive sprocket is integrally formed with the
The chain (or
Is a toothed belt) 62 and the belt mechanism BM is
It is configured. For this reason, the transmission input shaft 20
The rotation is the seventh counter shaft via the belt mechanism BM
It is transmitted to CS7. The second counter shaft CS2 is fixedly mounted.
The eighth gear 78 is a ninth gear constituting the final reduction mechanism FD.
(The final deceleration driven gear) 79. 9th gear 79
The left and right axle shafts 6a,
The power is transmitted to the left and right drive wheels (not shown) via 6b.
As a result, the rotational driving force from the engine is
Separated by the step transmission mechanism CVT and the belt mechanism BM
After being transmitted, they are assembled by the power transmission mechanism TM and decremented
Transmitted to the speed reducer FD, from the final reduction gear FD to the left and right drive wheels.
Is transmitted. The first of the trunnion assemblies described above
FIG. 10 shows a modified embodiment of FIG. Again the first
The first ton described above is described using the runion assembly as an example.
The same components as the runion assembly 150 have the same numbers.
The explanation is omitted and the configuration different from this is explained.
I will tell. This first trunnion assembly 250 is
Roller 253 and a plurality of conical rollers 254a are arranged in a circle.
With the row of angular roller bearings 254
Only the first trunnion assembly 1
50. As is clear from this configuration,
Also in the 1 trunnion assembly 250, the power law
La 253 has a solid structure, ensuring sufficient strength and synthesis.
Can be maintained. Further, the thrust component of the resultant force c shown in FIG.
Roller in the direction perpendicular to the axis of rotation O2)
It is received without trouble by the bearing 254,
The roller 253 can be rotatably supported. Next, a second modification of the trunnion assembly
An embodiment is shown in FIG. This first trunnion
The assembly 350 includes a power roller 353 and a plurality of balls.
354a are arranged in a circle on the same plane.
The structure is supported by the last ball bearing 354.
ing. This thrust ball bearing 354
The force in the direction of the turning axis O2 is received without hindrance, but at a right angle
Cannot receive force in any direction. For this reason,
A shaft hole 353 coaxial with the rotation axis O2 is formed in the word roller 353.
a, while the thrust ball bearing 35
And a rotating shaft portion 354b extending integrally from the race member of No. 4.
And projecting it into the shaft hole 353a.
You. And, between the rotation shaft portion 354a and the shaft hole 353a.
The needle roller bearing 354c
While supporting the roller 353 rotatably,
The force in the direction perpendicular to the rotation axis O2 is received. However,
In the case of this configuration, a shaft hole 353 is formed in the power roller 353.
a, the strength and rigidity of the power roller 353
Becomes smaller by that amount. In the above description, the power roller is concave.
Part, a convex part is provided on the reinforcing member, and both are loosely fitted.
However, this may be reversed. That is, the power roller
And the reinforcing member is provided with a concave,
You may let it. In addition, loose fitting between these concave portions and convex portions
Therefore, in addition to the loose fitting between the convex portion 157a and the concave portion 153b,
The power roller is formed by the cover 157b of the reinforcing member 157.
Loose fit that gently clamps the spherical contact surface 153a of the 153
In the combined configuration, that is, the cover portion 157b becomes a concave portion,
A configuration in which the convex portion composed of the spherical contact surface 153a is loosely fitted.
The loose fitting structure of one of these may be provided.
It may be just the result. [0040] As described above, according to the present invention,
Formed on opposing surfaces of power roller and reinforcing member
Loose fitting between the convex portion and the concave portion (the convex portion 157a and the concave portion 15)
3b and the cover portion 157b becomes a concave portion.
A convex portion composed of a spherical contact surface 153a is loosely fitted into this.
Power roller to the trunnion member
The trunnion assembly alone is
There is no risk that the power roller will fall off the trunnion member.
No. This allows the power roller to move against the trunnion member.
Even if a configuration supported by linear bearings is adopted,
Difficulty assembling the runion assembly
Absent. In addition, the support structure using linear bearings
By inserting the swing shaft into the trunnion member
There is no need to form a shaft hole for
The strength and rigidity of the material can be increased. It should be noted that an angular contact is formed on the linear bearing.
Power roller is rotatably supported via ball bearings
It is possible to adopt a configuration that has
If formed, a shaft hole for inserting the rotating shaft into the power roller
No need to form, the strength and rigidity of the power roller
Can be increased.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic diagram showing a power transmission path configuration of a toroidal continuously variable transmission including a toroidal transmission mechanism according to the present invention. FIG. 2 is a cross-sectional view illustrating a configuration of a toroidal continuously variable transmission mechanism that forms the transmission. FIG. 3 shows the toroidal continuously variable transmission mechanism as indicated by an arrow III in FIG.
It is sectional drawing shown along -III. FIG. 4 is a sectional view showing a first trunnion assembly constituting the toroidal continuously variable transmission mechanism. 5 shows the first trunnion assembly as indicated by arrow V in FIG.
It is sectional drawing shown along -V. 6 shows the first trunnion assembly as indicated by an arrow VI in FIG.
It is sectional drawing shown along -VI. FIG. 7 is an explanatory diagram showing a force acting on a power roller at the time of transmitting a rotational driving force in the first trunnion assembly. FIG. 8 is an explanatory diagram showing a force acting on a power roller at the time of transmitting a rotational driving force in the first trunnion assembly. FIG. 9 is an explanatory diagram showing a force acting on a power roller at the time of transmitting a rotational driving force in the first trunnion assembly. FIG. 10 is a sectional view showing a first modified embodiment of the first trunnion assembly constituting the toroidal transmission mechanism according to the present invention. FIG. 11 is a sectional view showing a second modified embodiment of the first trunnion assembly constituting the toroidal transmission mechanism according to the present invention. DESCRIPTION OF SYMBOLS 20 Input shaft 100, 200 First and second toroidal transmission units 110, 210 First and second input disks 120, 220 First and second output disks 150, 160, 250, 260 First to second 4 trunnion assembly 151, 161 trunnion member 151c support plane (support portion) 151d support side surface (support portion) 152, 162 trunnion bearing portions 153, 163 power roller 153a concave portion 157 reinforcing member 157a convex portion

Claims (1)

Claims: 1. A trunnion assembly is swingably sandwiched between an input disk and an output disk which are disposed so as to be rotatable relative to each other on the same rotation axis and opposed to each other. A trunnion assembly includes a power roller sandwiched between opposing surfaces of the input disk and the output disk, and a power roller interposed between the input disk and the output disk on a rocking axis extending in a plane perpendicular to the same rotation axis. The power roller comprises a movable trunnion member, wherein the trunnion member is formed by integrally connecting a pair of bearing portions that are swingably supported at both ends in the swing axis direction and the bearing portions. And a support portion rotatably supporting the power roller supported by the support portion, and attached to both ends of the support portion by being connected thereto. Forming a convex portion on one of the opposing surfaces of the power roller and the reinforcing member and forming a concave portion on the other, and loosely fitting the convex portion and the concave portion. The power roller is configured to be held between the support portion and the reinforcing member while allowing a predetermined amount of relative movement of the power roller relative to the support portion in a direction perpendicular to the rotation axis thereof. Toroidal transmission mechanism.