JP2000145920A - Continuously variable transmission of infinite transmission gear ratio - Google Patents

Abstract

PROBLEM TO BE SOLVED: To positively install an upper link pivot in employing a toroidal type continuously variable transmission. SOLUTION: A space 14i for housing a unit input shaft side having a toroidal type continuously variable transmission and a space 14o for housing a unit output shaft side communicate with each other and formed in a casing 14. The toroidal type continuously variable transmission 2 has an upper link 31 for linking facing trunnions 30 at their upper parts each other for oscillation. In an upper link post 28 for oscillatably supporting the upper link 31, its base end side is fixed to the space 14i and its end side is cantilevered to project up to a position for communicating the space 14i with the space 14o.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a continuously variable transmission having an infinitely variable transmission ratio, and more particularly to a continuously variable transmission employing a toroidal type.

[0002]

2. Description of the Related Art A belt-type or toroidal-type continuously variable transmission is conventionally known as a vehicle transmission. In order to further expand the shift range of such a continuously variable transmission, a continuously variable transmission is known. A continuously variable transmission with an infinitely variable transmission ratio that can control the transmission ratio to infinity by combining a constant transmission and a planetary gear mechanism is known, for example, Japanese Patent Application Laid-Open No. 63-219956.

[0003] In this system, a unit input shaft of a continuously variable transmission having an infinitely variable transmission ratio is connected to an engine. Are connected in parallel and these output shafts are connected by a planetary gear mechanism.The output gear of the continuously variable transmission is connected to the sun gear of the planetary gear mechanism via a chain, and the output shaft of the fixed transmission is used for power circulation. The planetary gear mechanism is connected to a carrier via a mode clutch.

[0004] The continuously variable transmission output shaft connected to the sun gear
While being connected to the unit output shaft, which is the output shaft of the infinitely variable speed ratio transmission, via the direct connection mode clutch, the ring gear of the planetary gear mechanism is also connected to the unit output shaft.

In such a continuously variable transmission with an infinite transmission ratio,
By connecting the power circulation mode clutch and disengaging the direct connection mode clutch, the total reduction ratio is changed from a negative value to a positive value to infinity ( Power-circulation mode that controls almost continuously including geared neutral) and the power-circulation mode clutch is disconnected, while the direct-coupled mode clutch is connected and the product of the gear ratio of the continuously variable transmission and the gear ratio by chain transmission Can be selectively used in the direct connection mode having a speed ratio corresponding to the speed ratio.

As a structure of a toroidal-type continuously variable transmission, one disclosed in Japanese Patent Application Laid-Open No. 9-317837 is known.

[0007]

However, in the above-described conventional infinitely variable transmission, the toroidal-type continuously variable transmission employs a toroidal-type continuously variable transmission as the continuously variable transmission. It is necessary to assemble the upper link post and the upper link on the casing side, but since the continuously variable transmission on the unit input shaft side and the unit output shaft are connected via a chain etc., the unit input shaft and the unit output shaft It is necessary that two spaces accommodating the vehicle communicate with each other. For this reason, as disclosed in Japanese Patent Application Laid-Open No. 9-317837, etc., the upper link post must be firmly fixed inside the casing, but the space for accommodating the continuously variable transmission forms the unit output shaft. There was a problem that it was difficult to secure a place to attach the upper link post because it communicated with the space to accommodate.

The present invention has been made in view of the above problems, and has as its object to securely mount an upper link post when a toroidal type continuously variable transmission is employed.

[0009]

A first aspect of the present invention is a toroidal type continuously variable transmission and a fixed transmission which are respectively connected to a unit input shaft and a toroidal type continuously variable transmission which is disposed on a unit output shaft. A planetary gear mechanism comprising: a sun gear connected to the output shaft of the unit; a carrier connected to the output shaft of the fixed transmission; and a ring gear connected to the unit output shaft; and a continuously variable transmission via the carrier from the unit input shaft. A power circulation mode clutch interposed in the middle of a transmission path leading to the machine output unit; a direct-coupled mode clutch interposed between two elements of a sun gear, a carrier, and a ring gear of the planetary gear mechanism; A transmission means for transmitting a driving force from the toroidal-type continuously variable transmission to the sun gear, and a housing mounted parallel to the unit input shaft and the unit output shaft; And a continuously variable transmission having an infinitely variable gear ratio having a casing for accommodating the unit output shaft therein, wherein a first space for accommodating the unit input shaft side and a unit output shaft are accommodated in the casing. A second space to be mounted is formed so as to communicate with each other, and the toroidal-type continuously variable transmission has a link that connects the upper portions of the opposing trunnions to each other and swings, and supports the link in a swingable manner. The link support member has a base end fixed to the first space, and an end supporting the link protrudes to a position communicating the first space and the second space.

According to a second aspect of the present invention, in the first aspect, the toroidal-type continuously variable transmission includes two sets of toroidal transmission portions, and a link supporting member of each transmission portion is integrally formed. Respectively so as to be swingable.

[0011] The third invention is the first or the second invention.
In the invention, the link support member is provided with a reinforcing member protruding from the end side to be connected to a member for sealing the casing.

In a fourth aspect based on the third aspect, the reinforcing member is formed along the axis of the unit input shaft.

According to a fifth aspect of the present invention, there is provided a toroidal-type continuously variable transmission and a constant transmission respectively connected to the unit input shaft, and an output shaft of the toroidal-type continuously variable transmission disposed on the unit output shaft. A planetary gear mechanism comprising: a sun gear connected to an output shaft of a constant transmission; a ring gear connected to a unit output shaft; and a continuously variable transmission output unit via the carrier from the unit input shaft. A power-circulating mode clutch interposed in the middle of a transmission path leading to the sun, a carrier and a ring gear of the planetary gear mechanism, and a direct-coupled mode clutch interposed between two elements of the planetary gear mechanism. A transmission means for transmitting a driving force from a step transmission to the sun gear; and a housing arranged in parallel with the unit input shaft and the unit output shaft. And a casing in which the knit output shaft is housed. The toroidal-type continuously variable transmission includes two sets of toroidal transmission units, and the gears housed on an intermediate wall. While the power is transmitted through the intermediate wall, link support members are respectively protruded from the intermediate wall along the unit input shaft, and the links for interconnecting the upper portions of the trunnions of the respective toroidal transmission portions are connected to the link support member. Swingably supported.

In a sixth aspect based on the fifth aspect, the link support member is provided with a reinforcing member projecting from a position connected to the link to a member for sealing the casing.

In a seventh aspect based on the sixth aspect, the reinforcing member is formed along the axis of the unit input shaft.

[0016]

According to the first invention, the toroidal type continuously variable transmission and the unit input shaft are housed in the first space formed inside the casing, while the unit input shaft side is housed in the second space. The end of the link support member supported by the first space for accommodating the unit input shaft protrudes from a position where the two spaces formed inside the casing communicate with each other, and a toroidal type is formed through this end. A link connecting the opposing trunnions of the continuously variable transmission is swingably supported. The cantilever support of the link support member ensures the link support strength and accurately prevents axial displacement of the opposing trunnions while reliably preventing the link from displacing in the axial direction of the unit input shaft. Can be done.

According to a second aspect of the present invention, when the toroidal type continuously variable transmission is a double cavity type having two sets of toroidal transmission portions, a link supporting member for supporting each link is integrally formed. By doing so, it is possible to prevent an increase in the number of parts and to suppress manufacturing costs, and to reduce man-hours during assembly to improve productivity.

In the third invention, a member for sealing the casing, for example, a reinforcing member connected to a sealing member such as a side cover is provided from an end of the link support member for supporting the link. The link support member is the first
The reinforcing member side is supported by the sealing member in the casing in the space, and the support strength of the link can be improved.

According to a fourth aspect of the present invention, the reinforcing member is formed along the axis of the unit input shaft, so that the link can be reliably prevented from displacing in the axial direction of the unit input shaft, and the shaft of the opposing trunnion can be prevented. Direction displacement can be accurately synchronized.

According to a fifth aspect of the present invention, there is provided a toroidal-type continuously variable transmission having a double cavity type having two sets of toroidal transmission portions, and a pair of links each protruding from an intermediate wall along the unit input shaft. The link connecting the upper parts of the trunnions of each toroidal transmission section to each other is swingably supported by the support member, and the link support member is formed on the intermediate wall, so the assembly of the link support member is completed only by attaching the intermediate wall to the casing. In addition, the assembling operation is simplified to improve workability, and the internal shape of the casing is not restricted, so that the degree of freedom in design can be improved.

According to a sixth aspect of the present invention, the link support member is provided with a reinforcing member projecting from a position connected to the link to a member for sealing the casing. The reinforcing member side is supported by the sealing member, respectively, so that the support strength of the link can be improved.

According to a seventh aspect of the present invention, the reinforcing member is formed along the axis of the unit input shaft, so that the link is reliably prevented from being displaced in the axial direction of the unit input shaft, and the shaft of the opposing trunnion is prevented. Direction displacement can be accurately synchronized.

[0023]

An embodiment of the present invention will be described below with reference to the accompanying drawings.

FIGS. 1 to 4 show an example in which a continuously variable transmission with an infinite speed ratio is constructed using a toroidal type continuously variable transmission having a double cavity.

As shown in FIGS. 1 and 2, the gear ratio can be continuously changed to the unit input shafts 1a and 1b of the infinitely variable speed transmission connected to the crankshaft 13 of the engine. Toroidal continuously variable transmission 2 and gear 3
a, a constant transmission 3 (reduction gear) composed of a counter gear 3b is connected in parallel, and these output shafts 4 and 3c are arranged on the unit output shaft 6 side. The output shaft 4 of the toroidal type continuously variable transmission 2 is connected to a sun gear 5a of the planetary gear mechanism 5 and the output shaft 3c of the constant transmission 3 is connected to the planetary gear via a power circulation mode clutch 9 by a planetary gear mechanism 5. It is connected to the carrier 5b of the gear mechanism 5.

The continuously variable transmission output shaft 4 connected to the sun gear 5a receives the driving force of the toroidal type continuously variable transmission 2 from the gear 4a and the chain 40 (transmission means), and receives an infinite transmission ratio through the direct connection mode clutch 10. The ring gear 5c is connected to a unit output shaft 6 which is an output shaft of the large continuously variable transmission.
Are also coupled to the unit output shaft 6.

A transmission output gear 7 (a continuously variable transmission output section) is provided on the right side of the unit output shaft 6 in the drawing, and the transmission output gear 7 meshes with the final gear 12 of the differential gear 8, Driving force is transmitted to the drive shafts 11a and 11b connected to the gear 8 at a predetermined total reduction ratio.

The toroidal type continuously variable transmission 2 is shown in FIGS.
As shown in FIG. 2, the input disk 21 and the output disk 22 are of a double-cavity half-toroidal type that sandwiches and presses the power rollers 20, 20, respectively. However, a second toroidal transmission unit 2B is arranged on the opposite side.

An output gear 24 is interposed between the output disk 22 of the first toroidal transmission section 2A and the output disk 22 of the second toroidal transmission section 2B. Unit input shaft 1a,
1b is connected to a gear 4a formed on the continuously variable transmission output shaft 4 of the unit output shaft 6 arranged in parallel with 1b.

As shown in FIG. 2, the unit input shafts 1a and 1b are arranged coaxially and connected in the rotational direction via a loading cam device 23 of the toroidal type continuously variable transmission 2. And the unit input shaft 1a is connected to the crankshaft 13 of the engine.
The gear 3a of the constant transmission 3 is formed, and the unit input shaft 1b
Are connected to two sets of input discs 21 and 21, and the first and second toroidal transmission units 2 </ b> A and 2 </ b> B are driven by the axial pressing force generated by the loading cam device 23 according to the input torque from the unit input shaft 1 a. The power rollers 20, 20 are pinched and pressed between the input and output disks to transmit torque.

In the continuously variable transmission with infinite transmission ratio, the power circulation mode clutch 9 is released, and the direct connection mode clutch 10 is engaged to transmit the driving force according to the transmission ratio of the toroidal type continuously variable transmission 2. By disengaging the direct connection mode and the power circulation mode clutch 9 and disengaging the direct connection mode clutch 10, the infinite speed ratio is determined according to the speed ratio difference between the toroidal type continuously variable transmission 2 and the fixed transmission 3. A power circulation mode in which the unit speed ratio (speed ratio between the unit input shaft 1a and the unit output shaft 6) of the entire stepped transmission is controlled almost continuously from a negative value to a positive value, including infinity, is selectively selected. Can be used for

Here, the inner periphery of the casing 14 is shown in FIG.
As shown in FIG. 3, a space 14i for accommodating the toroidal type continuously variable transmission 2 communicates with a space 14o having a substantially circular cross section for accommodating the unit output shaft 6 side. Both ends of the accommodated casing 14 are open, and a housing 15 fastened to an engine (not shown) is fastened to an opening 14A on the constant transmission 3 side, and the housing 15 is sealed by a partition 15A of the housing 15. A side cover 16 is provided at the open end of the second toroidal transmission portion 2B.
Are fastened and sealed.

The unit input shaft 1b serving as the input shaft of the toroidal type continuously variable transmission 2 is connected to the intermediate wall 25 interposed between the first and second toroidal transmission units 2A and 2B and the side cover 16. One end and the central portion are supported by the provided bearing 50.

The intermediate wall 25 is, as shown in FIGS.
A pair of partition walls 2 fastened in the axial direction by bolts 25c
The output gear 24 is rotatably supported within 5a, 25b. The output gear 24 has a cylindrical portion 2 that protrudes in the axial direction toward the first and second toroidal transmission portions 2A, 2B.
4A and 24A are formed, and the cylindrical portion 24A and the partition wall 25 are formed.
The output gear 24 is rotatably supported by bearings 26 interposed on the inner circumferences of a and 25b.

Output disks 22, 22 are spline-coupled to the outer periphery of the cylindrical portions 24A, 24A projecting in the axial direction by a predetermined amount from the intermediate wall 25, respectively.
A unit input shaft 1b is inserted through the inner periphery, and a bearing 5 is provided between the inner peripheral end of the output disk 22 and the unit input shaft 1b.
1, the unit input shaft 1 b is supported by the intermediate wall 25 so as to be rotatable relative to the output disks 22, 22.

The connection of the intermediate wall 25 to the casing 14 is as follows.
This is achieved by engaging one of the partitions 25a with a bracket 18 protruding at a predetermined position on the inner periphery of the casing 14 and fastening the bolt 19 in the axial direction of the unit input shaft 1b. The partition wall 25a on the side of the machine 3 protrudes a part of the outer periphery and forms a through hole in the axial direction for inserting the bolt 19, while the bracket 18 has a screw hole in the axial direction.

Therefore, in order to assemble the intermediate wall 25, the output gear 24 is housed in advance, the partition walls 25a and 25b are fastened with the bolts 25c, and the output disks 22 and 22 are connected. The intermediate wall 25 may be inserted into the inner periphery of the casing 14 from the opening on the side, and the partition wall 25a may be engaged with the bracket 18 and then fastened with the bolt 19.

On the other hand, as shown in FIG. 3, the transmission mechanism of the toroidal type continuously variable transmission 2 is adjacent to the inner circumference of the casing 14 below the space 14o having a circular cross section in which the unit output shaft 6 is housed. The power rollers 20, 20 housed in the matching space 14 i and opposed to each other are pivot shafts 33, 33.
Are respectively supported by the trunnions 30 and 30.
The casing 14 opens downward in the figure to define an oil pan (not shown).

The trunnions 30, 30 are supported by the cylinder body 34, the upper link 31, and the lower link 32 so as to be displaceable in the axial direction and around the rods 30A, 30B provided at the lower ends, respectively.

Then, the rods 3 of the trunnions 30, 30
When the hydraulic cylinders 35, 35 connected to 0A, 30B drive the trunnions 30, 30 in the axial direction, the power rollers 20, 20 rotate (referred to as tilting) around the axes of the rods 30A, 30B. The contact ratio between the disk and the output disk changes, and the gear ratio is continuously changed.

The trunnions 30, 30 disposed opposite to each other
The upper end is interconnected by an upper link 31 and the lower end is interconnected by a lower link 32.
20 against the thrust force applied to the upper link 3
1. The lower link 32 keeps the center distance between the trunnions 30 constant.

The upper link 31 is swingably supported by an upper link post 28 inserted through a through hole 31A provided at the center, and is connected to the trunnions 30, 30 through through holes provided at both ends. In response to the opposing axial displacements of the trunnions 30, 30, the trunnions 30, 30 swing about the upper link post 28 and allow the trunnions 30, 30 to displace about the axis. The through-holes provided at both ends of the upper link 31 and the trunnion 30
The upper portion allows relative swing and rotation via a spherical bearing or the like.

In order to fix the upper link post 28 to the casing 14, as shown in FIGS. 3 and 4, of the casing 14 facing the first and second toroidal transmission portions 2A and 2B, the unit input shaft 1b From the side of the casing 14 than on the axis, ceilings 17, 17 having a predetermined plane are formed toward the center of the inner periphery of the casing 14, and the base ends are fastened to the ceilings 17, 17. On the other hand, support members 27, 27 projecting to the middle of the trunnions 30, 30 disposed opposite each other and projecting between the two spaces 14i, 14o are fixedly provided.

A plurality of through holes 27a are formed in the base end side of the support member 27 in parallel with the axis of the trunnion 30, and are inserted into the through holes 27a from the opening of the casing 14 shown in the lower part of FIG. The support members 27, 27 are fastened to the ceiling 17 by the bolts 29.

On the other hand, the tips of the support members 27, 27
An upper link post that protrudes into a space in which the two spaces 14i and 14o communicate with each other, and that supports an upper link 31 in a swingable manner on the outer periphery of a post base 27b of a cylindrical member protruding from the tip toward the unit input shaft 1b. After engaging the inner circumference of the post 28, the bolt 28A is
7b, the upper link post 2
8 is supported by the casing 14 via a cantilevered support member 27. The post base 27b is also formed in parallel with the axis of the trunnion 30, and the assembling operation can be easily performed by inserting the upper link post 28 and the bolt 28A from the opening of the casing 14. The structures of the post base 27b and the upper link post 28 may be the same as those of the above-mentioned conventional example of JP-A-9-317837.

The lower link 32 has a through hole provided at the center thereof swingably supported by a link support member 29 provided on the cylinder body 34 side, as in the conventional example, and is provided at both ends. Trunnions 30, 3 through the through holes
0, and swings around the link support member 29 in accordance with the opposing axial displacements of the trunnions 30, 30 and allows the trunnions 30, 30 to be displaced around their axes. The cylinder body 34 is fastened to the casing 14 via a bracket (not shown).

Thus, between the two spaces 14i, 14o defined inside the casing 14, the support members 27, 27, whose base ends are supported by the ceiling 17 provided in the casing 14, are provided.
, And by supporting the upper link posts 28, 28, the pair of trunnions 30, 30 can be connected via the upper link 31, and the support members 27,
27 is secured to the ceiling portions 17 and 17 having a predetermined plane, so that sufficient strength is secured and the upper link 31 is reliably prevented from displacing the upper link 31 in the axial direction of the unit input shaft 1b. Can be swingably supported, and the axial displacements of the opposing trunnions 30, 30 can be accurately synchronized.

The support members 27, 27 can be assembled from the side of the oil pan where the casing 14 is opened, so that the workability in the assembly process can be ensured. 17, 17
Then, the upper link posts 28, 28 are respectively fastened to the support members 27, 27, and then the upper link 31, the trunnion 30, etc. are sequentially inserted from the opening of the casing 14 shown in the lower part of FIG. It is only necessary to assemble, and it is possible to ensure both the support rigidity of the upper link 31 and the productivity.

The intermediate wall 25 may be inserted into the inner periphery of the casing 14 from the opening on the fixed transmission 3 side and fastened to the bracket 18 projecting from the inner periphery. Since only the bolt 19 is screwed in the axial direction from the opening, the assembling work can be performed easily and quickly without skill.

FIGS. 5 and 6 show a second embodiment in which the support members 27, 27 of the upper link post 28 shown in the first embodiment are replaced by integrated support members 127. Is similar to that of the first embodiment.

The support member 127 has a U-shaped planar shape, and has first and second toroidal transmission portions 2 at both ends.
Post bases 27b, 27b that respectively support the upper link posts 28, 28 of A and 2B protrude.

The concave portion 1 is formed at the center of the support member 127.
28 are formed in a U-shape so that the support member 12
7, a ceiling portion 17 of a casing 14 as shown in FIG.
17, the intermediate wall 25 accommodating the output gear 24
And the support member 127 can be prevented from interfering with each other.

As described above, since the upper link posts 28, 28 of the first and second toroidal transmission portions 2A, 2B are supported by the single support member 127, the number of parts is reduced, the production cost is reduced, and the productivity is reduced. Can be improved.

FIG. 7 shows a third embodiment in which the support members 27, 27 of the upper link posts 28, 28 shown in the first embodiment are formed on the intermediate wall 25.
7A and 227B, and the other configuration is the same as that of the first embodiment.

The partition walls 25a, 25b constituting the intermediate wall 25
Support members 227A and 227B project from the side surfaces of the input and output disks 21 and 22 toward the middle of the input and output disks 21 and 22, respectively. Bases 27b are protruded respectively, and upper link posts 28 and upper links 31 are attached to these post bases 27b.

In this case, the intermediate wall 25 is connected to the casing 1
4 and the support member 227
A and 227B are also assembled, so that the assembling work is simplified and the workability is further improved, and it is not necessary to form the ceiling portion 17 in the casing 14,
There is no restriction on the shape of the casing 14, and the degree of freedom in design can be improved.

FIG. 8 shows a fourth embodiment in which a reinforcing member for improving the support rigidity of the support members 27, 27 of the upper link posts 28, 28 shown in the first embodiment is provided. The configuration is the same as in the first embodiment.

The support member 327A provided in the first toroidal transmission portion 2A has an L-shaped planar shape, and the base end of the support member 327A has the same shape as the support member 27 of the first embodiment. It is brought into contact with the ceiling portion 17 and fastened by bolts inserted into the plurality of through holes 27a.

A support portion 300 extends from the base end of the support member 327A fastened to the ceiling portion 17 toward the axis of the unit input shaft 1b, and the axis of the unit input shaft 1b of the support portion 300 is extended. A post base 27b is formed on the line in the same manner as in the first embodiment.
7b has an upper link post 28 and an upper link 3
1 is attached.

Further, from the support portion 300 on which the post base 27b is formed, the reinforcing portion 30 is moved along the axis of the unit input shaft 1b toward the engine, that is, toward the right side in FIG.
The reinforcing portion 301 is formed up to a position where the reinforcing portion 301 comes into contact with the inner periphery of the partition wall 15A of the housing 15, and the reinforcing portion 301 is formed.
The bolt 15B penetrating the partition wall 15A is fastened to the screw hole 301A formed on the end face of No. 01.

On the other hand, the support member 327B provided on the second toroidal transmission portion 2B also has an inverted L-shaped planar shape similarly to the above-mentioned support member 327A, and the base end side has the ceiling portion 17 of the casing 14. , And fastened by bolts inserted into the plurality of through holes 27a.

A support portion 300 extends from the base end of the support member 327B fastened to the ceiling 17 toward the axis of the unit input shaft 1b, and the axis of the unit input shaft 1b of the support portion 300 is extended. Post base 2 formed on line
7b to upper link post 28 and upper link 3
1 is attached.

Further, a reinforcing portion 302 is projected from the support portion 300 on which the post base 27b is formed, toward the side cover 16 side, that is, toward the left side in FIG. 8, along the axis of the unit input shaft 1b. The portion 302 is formed to a position where it contacts the inner periphery of the side cover 16, and the reinforcing portion 3
The bolt 16A penetrating the side cover 16 is fastened to the screw hole 302A formed on the end surface of the second cover 02.

Therefore, the support member 327A is connected to the ceiling portion 17 of the casing 14 fastened on the base end side and the reinforcing portion 301.
The support member 327B is supported at two places, the ceiling part 17 of the casing 14 fastened on the base end side and the side cover 16 fastened by the reinforcing part 302, and the support member 327B The support rigidity of the post base 27b can be improved as compared with the holding support. In particular, since the reinforcing portions 301 and 302 are disposed in parallel with the axis of the unit input shaft 1b, an axial force is applied to the upper link 31. Is added, the upper link post 28
The displacement of the trunnion 30 can be reliably prevented to prevent the trunnion 30 from falling down, and the accuracy of the shift control can be ensured.

FIG. 9 shows a fifth embodiment, in which a reinforcing member for improving the support rigidity of the support members 27, 27 of the upper link posts 28, 28 shown in the third embodiment is provided. The configuration is the same as in the first embodiment.

On both sides of the intermediate wall 25, support members 227A, 227B
Are respectively protruded, and these support members 227A, 227
Post bases 27b project from the ends of B toward the axis of the unit input shaft 1b, and upper link posts 28 and upper links 31 are attached to these post bases 27b.

Further, from the supporting member 227A to which the post base 27b is attached, a reinforcing portion 401 is protruded from the support member 227A along the axis of the unit input shaft 1b toward the engine side, that is, toward the right side in FIG. Is the housing 1
5 is formed up to a position where it comes into contact with the inner periphery of the partition wall 15A, and the partition wall 1 is inserted into the screw hole 401A formed on the end face of the reinforcing portion 401.
The bolt 15B penetrating 5A is fastened.

On the other hand, from the support member 227B to which the post base 27b of the second toroidal transmission portion 2B is attached, the side cover 16 side along the axis of the unit input shaft 1b,
That is, the reinforcing portion 402 is protruded toward the right side of FIG. The bolt 16A penetrating the side cover 16 is fastened.

Therefore, the support members 227A, 227B
Is the partition wall 15A and the side cover 16 in addition to the intermediate wall 25.
, The supporting rigidity can be further improved. In particular, the reinforcing portions 401 and 402 are connected to the unit input shaft 1.
b, the upper link 31
, The displacement of the upper link post 28 is reliably restricted to prevent the trunnion 30 from falling down, and the accuracy of the speed change control can be ensured.

In the above embodiment, an example is shown in which the position of the power circulation mode clutch 9 is disposed between the counter gear 3b and the carrier 5b. However, the power circulation mode clutch 9 is moved from the unit input shaft 1a to the unit. Output shaft 6
Can be disposed at any position between the transmission output gear 7 and the transmission gear 7. For example, as shown in FIG.
c and the unit output shaft 6 or, as shown in FIG.
Or, or as shown in FIG.
The continuously variable transmission output shaft 4 connected to the sun gear 5a may be interposed, and these arrangement positions are equivalent to the above embodiment.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a continuously variable transmission with an infinite gear ratio showing an embodiment of the present invention.

FIG. 2 is a longitudinal sectional view of a main part of the continuously variable transmission with an infinite speed ratio.

FIG. 3 is a cross-sectional view of a main part of the continuously variable transmission with an infinite transmission ratio.

FIG. 4 is a schematic plan view of the continuously variable transmission with an infinite transmission ratio showing the positional relationship between the continuously variable transmission and a support member.

FIG. 5 is a plan view of a support member according to the second embodiment.

FIG. 6 is a side view of the support member.

FIG. 7 is a schematic plan view of a continuously variable transmission with an infinite transmission ratio, showing a third embodiment, and showing a positional relationship between the continuously variable transmission and a support member;

FIG. 8 is a schematic plan view of a continuously variable transmission with an infinitely variable speed ratio, showing a fourth embodiment, and showing a positional relationship between the continuously variable transmission and a support member;

FIG. 9 is a schematic plan view of a continuously variable transmission with an infinite speed ratio, showing a tenth embodiment, and showing a positional relationship between the continuously variable transmission and a support member;

FIG. 10 is a schematic configuration diagram of an infinitely variable speed ratio continuously variable transmission, showing an example of an arrangement of a power circulation mode clutch.

FIG. 11 is a schematic configuration diagram of an infinitely variable speed ratio continuously variable transmission showing another example of the arrangement of the power circulation mode clutch.

FIG. 12 is a schematic configuration diagram of a continuously variable transmission with an infinite gear ratio showing another example of the arrangement of the power circulation mode clutch.

[Explanation of symbols]

 1a, 1b Unit input shaft 2 Toroidal-type continuously variable transmission 2A First transmission section 2B Second transmission section 3 Constant transmission 4 Continuously variable transmission output shaft 5 Planetary gear mechanism 6 Unit output shaft 7 Transmission output gear 9 Power circulation Mode clutch 10 Direct connection mode clutch 14 Casing 14i, 14o Space 15 Housing 15A Partition 16 Side cover 17 Ceiling 18 Bracket 20 Power roller 21 Input disk 22 Output disk 24 Output gear 24A Cylindrical part 25 Intermediate wall 25a, 25b Partition 27 Supporting member 27a Through hole 27b Post base 28 Upper link post 30 Trunnion 31 Upper link 32 Lower link

Claims (7)

[Claims] 1. A toroidal-type continuously variable transmission and a fixed transmission respectively connected to a unit input shaft, and a sun gear disposed on a unit output shaft and connected to an output shaft of the toroidally-type continuously variable transmission. A planetary gear mechanism including a carrier connected to the output shaft of the transmission and a ring gear connected to the unit output shaft; and a transmission path from the unit input shaft to the continuously variable transmission output unit via the carrier. An interposed power circulation mode clutch, a direct coupling mode clutch interposed between two elements of a sun gear, a carrier, and a ring gear of the planetary gear mechanism; and from the toroidal type continuously variable transmission to the sun gear. A transmission means for transmitting a driving force; and a unit for receiving the unit input shaft and the unit output shaft in parallel with the unit input shaft and the unit output shaft. In the continuously variable transmission with an infinite gear ratio having a casing to accommodate, a first space for accommodating a unit input shaft side and a second space for accommodating a unit output shaft are provided inside the casing. The toroidal-type continuously variable transmission is formed so as to communicate with each other, and has a link that links the opposing upper portions of the trunnions to each other and swings, and a link support member that swingably supports the link includes a base. An infinitely variable speed ratio continuously variable transmission, wherein an end side is fixed to the first space, and an end side supporting a link projects to a position communicating the first space and the second space. . 2. The toroidal-type continuously variable transmission includes two sets of toroidal transmission units, and a link of each transmission unit is swingably supported by an integrally formed link support member. The infinitely variable speed ratio continuously variable transmission according to claim 1. 3. The infinite transmission ratio according to claim 1, wherein the link support member is provided with a reinforcing member protruding from an end to be coupled to a member that seals the casing. Large continuously variable transmission. 4. The continuously variable transmission according to claim 3, wherein the reinforcing member is formed along an axis of a unit input shaft. 5. A toroidal-type continuously variable transmission and a constant transmission respectively connected to the unit input shaft; and a sun gear disposed on the unit output shaft and connected to an output shaft of the toroidal-type continuously variable transmission. A planetary gear mechanism including a carrier connected to the output shaft of the constant transmission, and a ring gear connected to the unit output shaft; and a transmission path from the unit input shaft to the continuously variable transmission output unit via the carrier. A power-circulating mode clutch interposed in a sun gear, a carrier, and a ring gear of the planetary gear mechanism; a direct-coupled mode clutch interposed between two elements of the planetary gear mechanism; and the sun gear from the toroidal-type continuously variable transmission. A transmission means for transmitting a driving force to the unit input shaft and the unit output shaft. A toroidal-type continuously variable transmission, comprising: a casing accommodated in an intermediate portion; wherein the toroidal-type continuously variable transmission includes two sets of toroidal transmission portions and transmits power via a gear accommodated in an intermediate wall. On the other hand, link support members are respectively protruded from the intermediate wall along the unit input shaft, and the links connecting the upper parts of the trunnions of the respective toroidal transmission sections are swingable by the link support members. A continuously variable transmission with an infinitely variable gear ratio, which is supported by 6. The transmission ratio infinity according to claim 5, wherein the link support member is provided with a reinforcing member protruding from a position connected to the link to a member sealing the casing. Continuously variable transmission. 7. The continuously variable transmission according to claim 6, wherein the reinforcing member is formed along an axis of a unit input shaft.