JP2005220983A - Toroidal continuously variable transmission - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize a structure capable of easily performing an operation of supporting support plates 11a, 11a and output side disks 5, 5 in a casing 23a.
SOLUTION: The upper ends of a pair of support frames 30 and 30 provided at positions sandwiching both the output side disks 5 and 5 are fitted and supported on the casing 23a. Further, the mounting plate portions 33, 33 provided at the lower ends of both the support frames 30, 30 are attached to the receiving plate portions 36, 36 provided on the upper surface of the actuator body 25a fixed in the casing 23a by bolts 38, 38. Fix fixed. Since these bolts 38 are arranged in parallel with the input shaft 1, the above problem can be solved by performing the mounting operation through wide openings provided at both front and rear ends of the casing 23a.
[Selection] Figure 1

Description

  The present invention relates to an improvement in a toroidal continuously variable transmission that is used as a transmission unit of an automatic transmission for automobiles or as a transmission for adjusting the operating speed of various industrial machines such as pumps.

  The use of a toroidal continuously variable transmission as shown in FIGS. 4 to 6 as an automatic transmission for automobiles has been studied and implemented in part, and has been widely known. This toroidal-type continuously variable transmission is called a double-cavity type that transmits power in two systems, and is provided around both ends of the input shaft 1 that is the rotating shaft described in the claims. The input side disks 2 and 2 which are the outer disks described in the above are supported via ball splines 3 and 3. Therefore, both the input side disks 2 and 2 are supported concentrically and freely in a synchronized manner. An output gear 4 is supported around the intermediate portion of the input shaft 1 so as to be freely rotatable relative to the input shaft 1. And the output side disks 5 and 5 which are the inner disks described in the claims are respectively spline-engaged with both ends of the cylindrical part provided at the center of the output gear 4. Accordingly, both the output side disks 5 and 5 rotate in synchronism with the output gear 4. In addition, a structure in which a pair of output-side disks are integrated into a shape such that their outer surfaces face each other in a double-cavity toroidal-type continuously variable transmission is also described in, for example, Patent Document 1 and has been conventionally known. It has been.

  A plurality (usually 2 to 3) of power rollers 6 and 6 are sandwiched between the input disks 2 and 2 and the output disks 5 and 5, respectively. These power rollers 6 and 6 are rotatably supported by inner surfaces of the trunnions 7 and 7 via support shafts 8 and 8 and a plurality of rolling bearings, respectively. The trunnions 7, 7 are pivots 9, 9 provided concentrically with each other for each trunnion 7, 7 at both ends in the length direction (vertical direction in FIGS. 4 and 6, front and back direction in FIG. 5). Oscillating and displacing around the center. The operation of inclining the trunnions 7 and 7 is performed by displacing the trunnions 7 and 7 in the axial direction of the pivots 9 and 9 by the hydraulic actuators 10 and 10. The inclination angle of 7 is synchronized with each other hydraulically and mechanically.

  That is, when changing the inclination angle of the trunnions 7 and 7 in order to change the transmission ratio between the input shaft 1 and the output gear 4, the trunnions 7 and 7 are moved by the actuators 10 and 10, respectively. For example, the right power roller 6 on the right side of FIG. 6 is on the lower side of the figure and the left side of the power roller 6 is on the upper side of the figure in the opposite direction (the same direction with respect to the rotation direction of the disks 2 and 5). Respectively. As a result, the direction of the tangential force acting on the contact portion between the peripheral surface of each of the power rollers 6 and 6 and the inner surfaces of the input disks 2 and 2 and the output disks 5 and 5 changes. (Side slip occurs at the contact portion). As the force changes, the trunnions 7 and 7 swing (tilt) in opposite directions around the pivots 9 and 9 that are pivotally supported by support plates 11 and 11 called yokes. . As a result, the contact position between the peripheral surface of each of the power rollers 6 and 6 and the inner surface of each of the input and output disks 2 and 5 changes, and rotation between the input shaft 1 and the output gear 4 occurs. The gear ratio changes.

  Regardless of the number of actuators 10, 10, the supply / discharge state of the pressure oil to each actuator 10, 10 is performed by one speed ratio control valve 12, and any one trunnion 7 is moved by this speed change. Feedback is made to the ratio control valve 12. The transmission ratio control valve 12 is fitted into a sleeve 14 that is displaced in the axial direction (front and back direction in FIG. 4, left and right direction in FIG. 6) by a stepping motor 13, and axially displaceable on the inner diameter side of the sleeve 14. Spool 15. A precess cam 18 is attached to the end of the rod 17 attached to any one of the trunnions 7 among the rods 17 and 17 connecting the trunnions 7 and 7 and the pistons 16 and 16 of the actuators 10 and 10. A feedback mechanism that is fixed and transmits the movement of the rod 17, that is, the combined value of the displacement amount in the axial direction and the displacement amount in the rotation direction, to the spool 15 via the recess cam 18 and the link arm 19. Is configured. Further, a synchronizing cable 20 is spanned between the trunnions 7 and 7 so that the inclination angles of the trunnions 7 and 7 can be mechanically synchronized even when the hydraulic system fails.

  When switching the speed change state, the stepping motor 13 displaces the sleeve 14 to a predetermined position corresponding to the speed ratio to be obtained, and opens the flow path in the predetermined direction of the speed ratio control valve 12. As a result, pressure oil is sent to the actuators 10 and 10 in a predetermined direction, and the actuators 10 and 10 displace the trunnions 7 and 7 in a predetermined direction. That is, the trunnions 7 and 7 swing around the pivots 9 and 9 while being displaced in the axial direction of the pivots 9 and 9 as the pressure oil is fed. Then, the movement (axial direction and swing displacement) of any one of the trunnions 7 is transmitted to the spool 15 via a recess cam 18 and a link arm 19 fixed to the end of the rod 17, and this spool 15 is displaced in the axial direction. As a result, in the state where the trunnion 7 is displaced by a predetermined amount, the flow path of the transmission ratio control valve 12 is closed, and supply / discharge of the pressure oil to the actuators 10 and 10 is stopped.

  During operation of the toroidal type continuously variable transmission as described above, one input side disk 2 (left side in FIGS. 4 and 5) is connected to a loading cam type as shown by a drive shaft 21 connected to a power source such as an engine. Alternatively, it is rotationally driven via a hydraulic pressing device 22. As a result, the pair of input side disks 2 and 2 supported at both ends of the input shaft 1 rotate synchronously while being pressed toward each other. Then, this rotation is transmitted to both the output side disks 5 and 5 through the power rollers 6 and 6 and is taken out from the output gear 4.

  In the case of the conventional structure shown in FIGS. 4 to 6 described above, the support plates 11 and 11 are supported in the casing 23 so as to be slightly displaceable by the support post portions 24a and 24b. Yes. That is, the support post portions 24a and 24b are fixed to the casing 23 directly or via the actuator body 25 in which the actuators 10 and 10 are accommodated. For this purpose, the support post portions 24 a and 24 b are supported and fixed to the casing 23 or the actuator body 25 by bolts 26 a and 26 b arranged in a direction perpendicular to the input shaft 1.

  In the case of such a conventional structure, the assembly work of the support post portions 24a and 24b, that is, the screwing and tightening operations of the bolts 26a and 26b must be performed in a limited space, which is troublesome. is there. On the other hand, Patent Document 2 describes a structure in which a screw hole is formed in a lower support post portion, and a bolt inserted through the bottom wall of the casing from below is screwed into this screw hole and further tightened. ing. In the case of such a structure described in Patent Document 2, the lower support post portion can be easily fixed, but on the support post portion, a stress-concentrated screw hole is formed. Consideration for securing the strength of the support post portion is necessary, and the weight of the support post portion may increase. Further, since each bolt penetrates the bottom wall, a structure for holding the seal of the portion is necessary. Furthermore, depending on the structure of the vehicle on which the toroidal continuously variable transmission is mounted, it may be difficult to insert the bolt from below the casing.

  In the case of the conventional structure shown in FIGS. 4 to 6, an intermediate wall 47 is provided between the outer surfaces of the pair of output side disks 5 and 5. An output sleeve 49 provided at the center of the output gear 4 is rotatably supported inside the intermediate wall 47 by a pair of rolling bearings 50 and 50 each of which is an angular ball bearing. . Both the output side disks 5 and 5 are spline-engaged with portions protruding from both side surfaces of the intermediate wall 47 at both ends of the output sleeve 49. In the case of such a toroidal-type continuously variable transmission provided with the intermediate wall 47, the support rigidity of both the output side disks 5 and 5 can be easily secured, but it is inevitable that the axial dimension and weight increase.

  On the other hand, as described in Patent Document 3, according to the structure in which the intermediate wall is omitted, it is possible to reduce the axial dimension and the weight of the toroidal continuously variable transmission. However, in the case of adopting a structure in which the intermediate wall is omitted in a double cavity type toroidal continuously variable transmission, both output side disks and both input side disks are supported in order to rotatably support both output side disks. It is necessary to provide a support frame in each of the pair of cavity portions existing at the interposition. In the case of the structure described in Patent Document 1, a pair of support frames each of which is a cantilever type is supported and fixed on the inner surface of the casing by mounting bolts provided in a direction perpendicular to the input shaft. In the case of such a structure, not only is it difficult to ensure the support rigidity of both the output side disks, but the degree of freedom in designing the casing is impaired because the mounting bolts are provided through the casing. It is difficult to ensure the rigidity of the casing. Furthermore, a trouble is required such that a sealing structure of a portion where the mounting bolt penetrates the bottom wall is necessary. Such a problem is not limited to the case where the toroidal type continuously variable transmission is implemented alone. For example, as described in Patent Documents 4 and 5, a toroidal type continuously variable transmission, a planetary gear type transmission, This may occur even in the case of a continuously variable transmission that combines the above.

Japanese Patent Laid-Open No. 11-141537 Japanese Patent No. 3314613 JP 2003-207005 A JP-A-6-174033 JP 2000-220719 A

  In view of the circumstances as described above, the present invention can easily perform the work of installing each support post portion in the casing, and it is easy to ensure the strength of the casing and the degree of design freedom. The present invention was invented to realize a toroidal continuously variable transmission that does not require a seal structure to support the post portion. Further, if necessary, it is possible to realize a structure that can secure the support rigidity of the output side disk with a structure without an intermediate wall.

A toroidal continuously variable transmission according to the present invention includes a casing, a rotating shaft, a pair of outer disks, an inner disk, a plurality of trunnions, a plurality of power rollers, a plurality of support plates, and a plurality of support posts. A part.
Among these, the rotating shaft is rotatably supported in the casing.
Further, the both outer discs are supported at both ends of the rotating shaft so as to freely rotate in synchronism with the rotating shaft in a state where the respective axial side surfaces of each of the outer disks are arcuate in cross section. Yes.
The inner disk can freely rotate relative to the rotating shaft around the middle portion of the rotating shaft with the axial side surface having an arcuate cross section facing the one axial side surface of the outer disks. It is supported by.
Each trunnion includes a plurality of trunnions in a pair of cavities existing between the axial side surface of the inner disk and one axial side surface of the outer disks with respect to the axial direction. The provided displacement is freely oscillating about a pivot that is twisted with respect to the rotation axis.
Each power roller is rotatably supported by each trunnion and has a spherical convex surface that is in contact with both axial side surfaces of the inner disk and one axial side surface of each outer disk. ing.
The support plates are for supporting the pivots provided at both ends of the trunnions.
The support post portions are fixed to the casing or a fixing member fixed in the casing in order to support the support plates.

In particular, in the toroidal type continuously variable transmission according to the present invention, a pair of support frames are arranged in both the cavities.
Each of these support frames is provided with an annular portion for inserting the rotating shaft in an intermediate portion thereof, and the support post portions in the vicinity of both end portions.
And the mounting plate part provided in at least one end of the both ends of the both support frames and the receiving plate part fixed in the casing are overlapped, and these mounting plate part and receiving plate part are connected to the rotating shaft. It is connected and fixed by bolts arranged in the direction of.

In the case of the toroidal-type continuously variable transmission of the present invention configured as described above, the operation of installing each support post portion in the casing can be easily performed.
That is, in order to fix both the support frames provided with the respective support post portions in the casing, the mounting plate portions provided at at least one of the both ends of the both support frames are attached to the receiving plate portions fixed in the casing. In the superposed state, the mounting plate portion and the receiving plate portion are coupled and fixed by bolts. This bolt is arranged in the direction of the rotation axis, and with respect to the axial direction of this rotation axis, there are large openings at both ends of the casing for inserting the inner and outer disks. Therefore, it is possible to easily perform the operation of coupling and fixing the mounting plate portion and the receiving plate portion with the bolt. It should be noted that the installation direction of the bolt and the axial direction of the rotating shaft may be slightly inclined. In the present specification and claims, the bolt is installed in the direction of the rotating shaft unless the tightening operation of the bolt is disturbed. Further, since it is not always necessary to form a screw hole in the mounting plate portion where stress tends to concentrate, ensuring the strength of both the support frames provided with the support post portions while reducing the weight of the support frames. Can be planned. In particular, it is difficult to increase the hardness of a member forming a screw hole by heat treatment, whereas it is easy to increase the hardness of a member having a simple through hole formed by heat treatment. Therefore, the hardness of both the support frames can be improved by heat treatment to ensure the strength of both the support frames.
Further, it is not necessary to form a through-hole through which a bolt for supporting and fixing each of the support post portions is formed in the bottom wall portion of the casing so as to penetrate both the inner and outer surfaces of the casing. Therefore, it is easy to ensure the strength of the casing and the degree of design, and it is not necessary to provide a seal structure to support the support post portions.
Furthermore, if necessary, it is possible to realize a structure that can secure the support rigidity of the inner disk with a structure without an intermediate wall.

When carrying out the present invention, preferably, as described in claim 2, an attachment in which screw holes for screwing bolts to receiving plate portions fixed in the casing are provided at one end portions of both support frames. Through holes for inserting the bolts are respectively formed in the plate portions.
If comprised in this way, the operation | work which fixes the said both support frames in which each support post part was provided in a casing can be performed still more easily. That is, in order to couple and fix the mounting plate portion and the receiving plate portion, it can also be performed by screwing and tightening bolts and nuts inserted through through holes formed in both plate portions. In this case, it is necessary to perform screwing and tightening work while holding down the nut. On the other hand, if a screw hole is formed in the receiving plate part, screwing and tightening work of bolts becomes unnecessary. In addition, since the mounting plate portion is formed with a through hole that is less likely to concentrate stress, it is easy to ensure the strength of the both support frames. .
Preferably, as described in claim 3, the receiving plate portion is fixed to a part of an actuator body that includes an actuator for displacing each supporting member and is supported and fixed in the casing.
In this case, preferably, as described in claim 4, a fitting convex portion is provided at the other end of the both support frames. And this fitting convex part is fitted in the fitting recessed part formed in the part which opposes the radial direction other end side of both cavities in the inner surface of the said casing.
If comprised in this way, the said receiving plate part can be installed in the said casing efficiently.

Preferably, as described in claim 5, the fitting convex portion, the annular portion, and the mounting plate portion of both the support frames are integrally formed, and the small-diameter side end portion of the inner disk is formed in the annular shape of the both support frames. The part is rotatably supported by a rolling bearing.
If comprised in this way, the support rigidity of an inner side disk can be ensured with a structure without an intermediate wall. That is, by supporting and fixing both ends of the both support frames, which are each of the integrated type, to the casing, both the support frames can be supported and fixed in the casing in a doubly supported beam type. Therefore, even if the intermediate wall is omitted, it is possible to sufficiently secure the support rigidity of the annular portion provided at the intermediate portion of the both support frames and the inner disk supported by the both annular portions.
In this case, preferably, as described in claim 6, the small-diameter side end portion of the inner disk is an angular ball bearing in which a preload is applied to both the annular portions, or as described in claim 7. And a four-point contact type ball bearing.
If comprised in this way, the support rigidity of this inner side disk can be made high, restraining the rotational resistance of the said inner side disk low.

  1 to 3 show an embodiment of the present invention. The input side disks 2 and 2 which are outer disks described in the claims are supported by ball splines 3 and 3 around both ends of the input shaft 1 which is the rotating shaft described in the claims. Yes. An output gear 4 is supported around the intermediate portion of the input shaft 1 so as to be freely rotatable relative to the input shaft 1. And the output side disks 5 and 5 which are the inner side disks described in the claims are respectively spline-engaged with the portions near both ends of the cylindrical portion 27 provided at the center of the output gear 4. Accordingly, both the output side disks 5 and 5 rotate in synchronism with the output gear 4.

  A plurality of power rollers 6 and 6 (see FIGS. 5 and 6) are sandwiched between the input disks 2 and 2 and the output disks 5 and 5, respectively. Each of these power rollers 6 and 6 is rotatably supported on the inner surface of trunnions 7 and 7 (see FIGS. 5 and 6) via support shafts 8 and 8 and a plurality of rolling bearings (see FIGS. 5 and 6). Has been. The trunnions 7 and 7 are swingable and displaceable around the pivots 9 and 9 (see FIGS. 5 and 6) provided concentrically with each other at both ends in the longitudinal direction. is there. Each of the pivots 9 and 9 is supported in a circular hole 28 and 28 provided at the four corners of the support plates 11a and 11a so as to freely swing and slightly displace in the axial direction. The operation of inclining the trunnions 7 and 7 is performed by displacing the trunnions 7 and 7 in the axial direction of the pivots 9 and 9 by hydraulic actuators 10 and 10 (see FIGS. 5 and 6).

  In the case of this embodiment in order to support both the support plates 11a, 11a in the casing 23a, both cavities 29, which are portions between the two input side disks 2, 2 and the two output side disks 5, 5, are provided. 29, a pair of support frames 30, 30 are arranged. Each of the support frames 30 and 30 is provided with an annular portion 31 for inserting the input shaft 1 in an intermediate portion thereof, and support post portions 24c and 24d in the vicinity of both end portions, respectively. Further, flat support plate portions 33 and 33 are provided at one end of the support frames 30 and 30, and cylindrical fitting convex portions 32 and 32 are provided at the other end, respectively.

  Also, the bottom portion of the top plate 34 of the casing 23a is thickened at the position directly above the cavities 29, 29, and the bottomed circular fitting recess 35 is opened at the side of the cavities 29, 29. , 35 are formed. The inner diameter in the free state of both the fitting recesses 35, 35 is the same as or slightly smaller than the outer diameter in the free state of the both fitting convex parts 32, 32, and the both fittings are made. Recesses 35, 35 The fitting protrusions 32, 32 can be freely fitted without rattling. On the other hand, on the upper surface of the actuator body 25a fixed to the lower part in the casing 23a, receiving plate portions 36, 36 are provided at a position directly below the cavities 29, 29 in a direction perpendicular to the arrangement direction of the input shaft 1. Yes.

  When the support frames 30 and 30 are fixed in the casing 23a, first, the fitting projections 32 and 32 provided at the other ends of the support frames 30 and 30 are fitted into the fitting recesses 35 and 35, respectively. Next, the mounting plate portions 33, 33 provided at one end of the both support frames 30, 30 are overlapped with the receiving plate portions 36, 36. In this state, there is a gap between the front end surfaces of both the fitting convex portions 32 and 32 and the concave surfaces of the both fitting concave portions 35 and 35. Then, the bolts 38, 38 inserted through the through holes 37, 37 formed in the both mounting plate portions 33, 33 are screwed into the screw holes 39, 39 formed in the both receiving plate portions 36, 36 and further tightened. . These bolts 38, 38 can be inserted into the casing 23a through large openings directed to the front and rear ends of the casing 23a, and the tightening operation can be performed by a tool inserted through the opening. For this reason, the operation | work which fixes both the said support frames 30 and 30 in the said casing 23a can be performed easily.

  It should be noted that a knock pin (not shown) is spanned between the mounting plate portions 33, 33 and the receiving plate portions 36, 36 to ensure the mounting position accuracy of the support frames 30, 30. preferable. In this case, for example, the knock pin is fixed to the receiving plate portions 36 and 36 in advance and is engaged with positioning holes 48 formed in the mounting plate portions 33 and 33. Even when it is necessary to ensure the positioning accuracy of either (or both) of the mounting plate portions 33 with respect to the axial direction of the input shaft 1, there is a gap between the mounting plate portion 33 and the receiving plate portion 36. The positioning accuracy can be ensured by sandwiching a shim plate having an appropriate thickness.

  In the annular portions 31 and 31 of the support frames 30 and 30 supported and fixed in the casing 23a as described above, both ends of the cylindrical portion 27 provided at the center of the output gear 4 are connected to a pair of balls. The bearings 41 and 41 are rotatably supported. These ball bearings 41, 41 are angular and preloaded, and are given a front combination contact angle. Further, the output side disks 5 and 5 are respectively spline-engaged between the both side surfaces of the output gear 4 and the ball bearings 41 and 41 at the intermediate portion in the axial direction of the cylindrical portion 27. .

  Further, the support plates 11a and 11a are supported on the support post portions 24c and 24d by support pins 42 and 42 so as to be swingable and displaceable. The support structure of the support plates 11a, 11a by the support pins 42, 42 is substantially the same as the structure described in the above-mentioned Patent Document 1. That is, the support holes 44 formed in the pivot portions 43, 43 provided at the center portions in the width direction of the both support plates 11a, 11a provided with the circular holes 28, 28 for supporting the pivots 9, 9 at the four corners. , 44, the intermediate portions of the support pins 42, 42, which are fitted and fixed at both ends, are inserted into pivot support holes 45, 45 formed in the support post portions 24c, 24d. The side on which the support hole and the pivot hole are provided may be reversed.

  In any case, the support plates 11a and 11a are supported on the support post portions 24c and 24d by the support pins 42 and 42 so as to be swingable and displaceable. The pivot shafts 9 and 9 provided at both ends of the trunnions 7 and 7 are respectively connected to the circular holes 28 and 28 provided at the four corners of the support plates 11a and 11a with radial needle bearings 46 and 46 ( (See FIG. 6). The outer peripheral surfaces of the outer rings of the radial needle bearings 46 and 46 are spherical convex surfaces, and the pivot shafts 9 and 9 are supported inside the circular holes 28 and 28 so as to be swingable and axially displaceable. .

  In the case of the present embodiment configured as described above, the operation of installing the support post portions 24c and 24d in the casing 23a can be easily performed. That is, assembling work as described above for fixing the support frames 30 and 30 provided with the support post portions 24c and 24d in the casing 23a is provided at both front and rear ends of the casing 23a. Easy to do through a large opening. Further, the mounting plate portions 33, 33 provided at one end portions of the both support frames 30, 30 are formed with through holes 37, 37 having smooth inner peripheral surfaces, and screw holes where stress is easily concentrated are formed. Not formed. Accordingly, it is possible to secure the strength of the support frames 30 and 30 provided with the support post portions 24c and 24d while reducing the weight of the support frames 30 and 30.

  Further, the receiving plate portions 36, 36 that are overlapped with the mounting plate portions 33, 33 are formed on the upper surface of the actuator body 25a, and the other end portions of the support frames 30, 30 are supported by uneven fitting. Therefore, it is not necessary to form a through hole through which a bolt for supporting and fixing the support post portions 24c and 24d is formed in the bottom wall portion of the casing 23a. Therefore, it is easy to ensure the strength and design freedom of the casing 23a, and it is not necessary to provide a seal structure to support the support post portions 24c and 24d.

Further, in the case of the present embodiment, the support rigidity of the both output side disks 5 and 5 can be secured with a structure in which the intermediate wall 47 is not provided as in the conventional structure shown in FIGS. That is, both end portions of the cylindrical portion 27 in which both the output side disks 5 and 5 are spline-engaged are connected to the both annular portions 31 and 31 provided in the intermediate portions of the both support frames 30 and 30. It is supported by bearings 41 and 41. Both the support frames 30 and 30 are supported at both ends in a doubly-supported manner, and a preload is applied to the ball bearings 41 and 41. Accordingly, it is possible to secure the support rigidity of the output disks 5 and 5 and to stabilize the contact state between the inner surfaces of the output disks 5 and 5 and the peripheral surfaces of the power rollers 6 and 6. . Even if both end portions of the cylindrical portion 27 are supported on the support frames 30 and 30 by four-point contact type ball bearings, the support rigidity of the output side disks 5 and 5 can be secured.
In addition, although illustration is abbreviate | omitted, a mounting plate part can be provided in the both ends of both support frames, respectively, and each of these mounting plate parts can also be each fixedly connected with each receiving plate part provided in the inner surface of the casing with a volt | bolt.

The present invention is not limited to a structure in which a pair of output side disks are independent of each other as shown in the figure, but a pair of output side disks are connected to each other as described in Patent Documents 1, 4, and 5 described above. It is also possible to implement a structure in which the outer surfaces of the two are integrated into a shape such that they are abutted.
In addition, as described in Patent Documents 4 and 5 described above, a toroidal continuously variable transmission and a planetary gear type transmission are combined to transmit rotation between the output side disk and the planetary gear type transmission. A structure in which a circular hollow rotating shaft arranged around the input shaft is used can also be implemented.
Furthermore, as a pressing device for securing the surface pressure of the rolling contact portion between the inner surface of each disk on the input side and output side and the peripheral surface of each power roller, a hydraulic device is used instead of the loading cam device as shown in the figure. The present invention can be carried out even with a structure using.

The principal part sectional drawing which shows the Example of this invention. The perspective view of a support frame. The perspective view of a support plate and a support pin. Sectional drawing which shows an example of the toroidal type continuously variable transmission conventionally known. AA sectional drawing of FIG. BB sectional drawing.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Input shaft 2 Input side disk 3 Ball spline 4 Output gear 5 Output side disk 6 Power roller 7 Trunnion 8 Support shaft 9 Pivot 10 Actuator 11, 11a Support plate 12 Gear ratio control valve 13 Stepping motor 14 Sleeve 15 Spool 16 Piston 17 Rod 18 Precess cam 19 Link arm 20 Synchronization cable 21 Drive shaft 22 Press device 23, 23a Casing 24a, 24b, 24c, 24d Support post part 25, 25a Actuator body 26a, 26b Bolt 27 Cylindrical part 28 Circular hole 29 Cavity 30 Support frame 31 Annular Part 32 fitting convex part 33 mounting plate part 34 top plate part 35 fitting concave part 36 receiving plate part 37 through hole 38 bolt 39 screw hole 41 ball bearing 42 support pin 43 pivot part 44 support hole 45 pivot hole 4 6 Radial needle bearing 47 Intermediate wall 48 Positioning hole 49 Output sleeve 50 Rolling bearing

Claims (7)

  A rotating shaft supported rotatably in the casing, and a rotating shaft supported on both ends of the rotating shaft in a state where the axial side surfaces of the rotating shaft are opposed to each other. With a pair of outer disks supported so as to be able to freely rotate in synchronization and an axial side surface having an arcuate cross section around the middle part of the rotating shaft, facing one axial side surface of both outer disks An inner disk that is freely supported relative to the rotating shaft, and a pair of cavity portions that are located between the axial side surface of the inner disk and one axial side surface of the outer disks with respect to the axial direction. A plurality of trunnions provided at both ends of each of the trunnions that are freely provided with swinging displacements around the pivots that are twisted with respect to the rotation shafts, and the trunnions that rotate. A power roller that is supported by each side and has a spherical convex surface is provided at each end of each trunnion and a power roller that is in contact with both axial sides of the inner disk and one axial side of each outer disk. A plurality of support plates for supporting the pivots, and a plurality of support post portions fixed to the casing or a fixing member fixed in the casing to support the support plates. In the toroidal-type continuously variable transmission, an annular portion for inserting the rotating shaft into each intermediate portion is provided in each of the cavities, and each support post portion is provided in the vicinity of each end portion. A pair of support frames are arranged, and a mounting plate portion provided at at least one end of both the support frames and a receiving plate portion fixed in the casing are overlapped to receive the mounting plate portion and the receiving plate portion. A Department, toroidal type continuously variable transmission, characterized in that attached fixed by arranged bolt in the direction of the rotation axis.   The toroidal continuously variable transmission according to claim 1, wherein a screw hole for screwing the bolt into the receiving plate portion and a through hole for inserting the bolt into the mounting plate portion are formed.   The toroidal type according to any one of claims 1 to 2, wherein the receiving plate portion includes an actuator for displacing each supporting member, and is fixed to a part of an actuator body supported and fixed in the casing. Continuously variable transmission.   A fitting projection is provided at the other end of both support frames, and the fitting projection is fitted into a fitting recess formed in a portion of the inner surface of the casing facing the other end in the radial direction of both cavities. The toroidal type continuously variable transmission described in any one of 1-3.   The fitting convex part, the annular part, and the mounting plate part of both the support frames are integrally configured, and the small-diameter side end of the inner disk is supported rotatably by the rolling bearing with respect to the annular part of the both support frames. The toroidal continuously variable transmission according to claim 4.   The toroidal continuously variable transmission according to claim 5, wherein the rolling bearing that supports the small-diameter end of the inner disk on the annular portions of both support frames is an angular ball bearing to which preload is applied.   The toroidal continuously variable transmission according to claim 5, wherein the rolling bearing that supports the small-diameter end of the inner disk on the annular portions of both support frames is a four-point contact type ball bearing.

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