JP2015105752A - Assembly method of toroidal type non-stage transmission - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an assembly method of a toroidal type non-stage transmission capable of preventing vibration of a drive piston in transporting a cylinder body.SOLUTION: An assembly A includes an input side disc 2 and an output side disc 34, a power roller 11 held between the discs 2, 34, and a trunnion 15 oscillating with a pivot 14 at a twist position with respect to a disc central shaft as a center and displacing in a shaft direction, and rotatably supporting the power roller 11. In a case where a cylinder body is transported in order to assemble the cylinder body into the assembly A, since a drive piston 33 is fixed to the cylinder body 31 by a fixture 51, vibration of the drive piston can be prevented.

Description

  The present invention relates to a method for assembling a toroidal continuously variable transmission that can be used in transmissions of automobiles and various industrial machines.

  For example, the thing of patent document 1 is known as an example of the double cavity type toroidal type continuously variable transmission used as a transmission for motor vehicles. This toroidal type continuously variable transmission is configured as shown in FIGS. As shown in FIG. 7, the input shaft 1 is rotatably supported inside the casing 50, and two input side disks 2, 2 and two output side disks 3 are disposed on the outer periphery of the input shaft 1. 3 is attached. An output gear 4 is rotatably supported on the outer periphery of the intermediate portion of the input shaft 1. Output side disks 3 and 3 are connected to cylindrical flange portions 4a and 4a provided at the center of the output gear 4 by spline coupling.

  The input shaft 1 is rotationally driven by a drive shaft 22 via a loading cam type pressing device 12 provided between an input side disk 2 and a cam plate 7 located on the left side in the drawing. . The output gear 4 is supported in the casing 50 via a partition wall 13 formed by coupling two members, so that the output gear 4 can rotate around the axis O of the input shaft 1 while the axis O. Directional displacement is prevented.

  The output side disks 3 and 3 are supported by needle bearings 5 and 5 interposed between the input shaft 1 so as to be rotatable about the axis O of the input shaft 1. Further, the left input side disk 2 in the figure is supported on the input shaft 1 via a ball spline 6, and the right side input disk 2 in the figure is splined to the input shaft 1. Rotates with the input shaft 1. Further, the power roller 11 (see FIG. 8) is freely rotatable between the inner side surfaces (concave surfaces) 2a, 2a of the input side discs 2, 2 and the inner side surfaces (concave surfaces) 3a, 3a of the output side discs 3, 3. Is sandwiched between.

  A step 2b is provided on the inner peripheral surface 2c of the input side disk 2 located on the right side in FIG. 7, and the step 1b provided on the outer peripheral surface 1a of the input shaft 1 is abutted against the step 2b. At the same time, the back surface (the right surface in FIG. 7) of the input side disk 2 is abutted against the loading nut 9. Thereby, the displacement of the input side disk 2 in the direction of the axis O with respect to the input shaft 1 is substantially prevented. Further, a disc spring 8 is provided between the cam plate 7 and the flange 1d of the input shaft 1, and this disc spring 8 is a concave surface 2a, 2a, 3a of each disk 2, 2, 3, 3. , 3a and the contact surface between the peripheral surfaces 11a and 11a of the power rollers 11 and 11 are applied with a pressing force.

  8 is a cross-sectional view taken along line AA in FIG. As shown in FIG. 8, a pair of trunnions 15, 15 that swing about a pair of pivots 14, 14 that are twisted with respect to the input shaft 1 are provided inside the casing 50. In addition, illustration of the input shaft 1 is abbreviate | omitted in FIG. Each trunnion 15, 15 has a pair of bent wall portions 20, 20 formed at both ends in the longitudinal direction (vertical direction in FIG. 8) of the support plate portion 16 so as to be bent toward the inner surface side of the support plate portion 16. have. The bent wall portions 20 and 20 form concave pocket portions P for accommodating the power rollers 11 in the trunnions 15 and 15. Further, the pivot shafts 14 and 14 are concentrically provided on the outer side surfaces of the bent wall portions 20 and 20, respectively.

  A circular hole 21 is formed in the central portion of the support plate portion 16, and the base end portion 23 a of the displacement shaft 23 is supported in the circular hole 21. Then, by swinging each trunnion 15, 15 about each pivot 14, 14, the inclination angle of the displacement shaft 23 supported at the center of each trunnion 15, 15 can be adjusted. Each power roller 11 is rotatably supported via a radial needle bearing 35 around the tip 23b of the displacement shaft 23 protruding from the inner surface of each trunnion 15, 15. 11 is sandwiched between the input disks 2 and 2 and the output disks 3 and 3. In addition, the base end part 23a and the front-end | tip part 23b of each displacement shaft 23 and 23 are mutually eccentric.

  The pivot shafts 14 and 14 of the trunnions 15 and 15 are supported so as to be swingable and displaceable in the axial direction (vertical direction in FIG. 8) with respect to the pair of yokes 23A and 23B, respectively. The horizontal movement of the trunnions 15 and 15 is restricted by 23B. Each yoke 23A, 23B is formed in a rectangular shape by pressing or forging a metal such as steel. Four circular support holes 18 are provided at the four corners of each of the yokes 23 </ b> A and 23 </ b> B, and the pivot shafts 14 provided at both ends of the trunnion 15 swing through the radial needle bearings 30. It is supported freely. In addition, a circular locking hole 19 is provided in the central portion of the yokes 23A and 23B in the width direction (left and right direction in FIG. 7). The inner peripheral surface of the locking hole 19 is a cylindrical surface and is a spherical post. 64 and 68 are fitted inside. That is, the upper yoke 23A is swingably supported by the spherical post 64 supported by the casing 50 via the fixing member 52, and the lower yoke 23B is a spherical post 68 and a cylinder for supporting the same. The upper cylinder body 61 of the body 31 is supported so as to be swingable.

  The displacement shafts 23 and 23 provided in the trunnions 15 and 15 are provided at positions 180 degrees opposite to the input shaft 1. Further, the direction in which the distal end portion 23b of each of the displacement shafts 23, 23 is eccentric with respect to the base end portion 23a is the same direction as the rotational direction of both the disks 2, 2, 3, 3 (in FIG. (Reverse direction). Further, the eccentric direction is a direction substantially orthogonal to the direction in which the input shaft 1 is disposed. Accordingly, the power rollers 11 and 11 are supported so that they can be slightly displaced in the longitudinal direction of the input shaft 1. As a result, even if each power roller 11, 11 tends to be displaced in the axial direction of the input shaft 1 due to elastic deformation of each component member based on the thrust load generated by the pressing device 12, each component This displacement is absorbed without applying an excessive force to the member.

  Further, between the outer surface of the power roller 11 and the inner surface of the support plate portion 16 of the trunnion 15, a thrust ball bearing (thrust bearing) 24 that is a thrust rolling bearing is sequentially formed from the outer surface side of the power roller 11. A thrust needle bearing 25 is provided. Among these, the thrust ball bearing 24 supports the rotation of each power roller 11 while supporting the load in the thrust direction applied to each power roller 11. Each of such thrust ball bearings 24 includes a plurality of balls (hereinafter referred to as rolling elements) 26, 26, an annular retainer 27 that holds the rolling elements 26, 26 in a freely rolling manner, And an annular outer ring 28. Further, the inner ring raceway of each thrust ball bearing 24 is formed on the outer side surface (large end surface) of each power roller 11, and the outer ring raceway is formed on the inner side surface of each outer ring 28.

  The thrust needle bearing 25 is sandwiched between the inner surface of the support plate portion 16 of the trunnion 15 and the outer surface of the outer ring 28. Such a thrust needle bearing 25 supports the thrust load applied to each outer ring 28 from the power roller 11, while the power roller 11 and the outer ring 28 swing around the base end portion 23 a of each displacement shaft 23. Allow.

  Furthermore, drive rods (trunnion shafts) 29 and 29 are provided at one end portions (lower end portions in FIG. 8) of the trunnions 15 and 15, respectively, and a drive piston ( Hydraulic pistons) 33, 33 are fixed. Each of the drive pistons 33 and 33 is oil-tightly fitted in a cylinder body 31 constituted by an upper cylinder body 61 and a lower cylinder body 62. The drive pistons 33 and 33 and the cylinder body 31 constitute a drive device 32 that displaces the trunnions 15 and 15 in the axial direction of the pivots 14 and 14 of the trunnions 15 and 15.

  In the case of the toroidal continuously variable transmission configured as described above, the rotation of the input shaft 1 is transmitted to the input side disks 2 and 2 via the pressing device 12. Then, the rotation of the input side disks 2 and 2 is transmitted to the output side disks 3 and 3 via the pair of power rollers 11 and 11, and the rotation of the output side disks 3 and 3 is further transmitted to the output gear 4. It is taken out more.

  When changing the rotational speed ratio between the input shaft 1 and the output gear 4, the pair of drive pistons 33, 33 are displaced in opposite directions. As the drive pistons 33 and 33 are displaced, the pair of trunnions 15 and 15 are displaced in directions opposite to each other. For example, the power roller 11 on the left side in FIG. 8 is displaced to the lower side in the figure, and the power roller 11 on the right side in the figure is displaced to the upper side in the figure.

  As a result, the peripheral surfaces 11a and 11a of the power rollers 11 and 11 act on contact portions of the input side disks 2 and 2 and the inner side surfaces 2a, 2a, 3a and 3a of the output side disks 3 and 3, respectively. The direction of the tangential force changes. As the force changes, the trunnions 15 and 15 swing in opposite directions around the pivots 14 and 14 pivotally supported by the yokes 23A and 23B.

  As a result, the contact position between the peripheral surfaces 11a and 11a of the power rollers 11 and 11 and the inner surfaces 2a and 3a changes, and the rotational speed ratio between the input shaft 1 and the output gear 4 changes. Further, when the torque transmitted between the input shaft 1 and the output gear 4 fluctuates and the amount of elastic deformation of each component changes, the power rollers 11 and 11 and the outer rings attached to the power rollers 11 and 11 will be described. 28 and 28 slightly rotate around the base end portions 23a and 23a of the displacement shafts 23 and 23, respectively. Since the thrust needle bearings 25 and 25 exist between the outer side surfaces of the outer rings 28 and 28 and the inner side surfaces of the support plate portions 16 constituting the trunnions 15 and 15, respectively, the rotation is performed smoothly. Is called. Therefore, as described above, the force for changing the inclination angle of each displacement shaft 23, 23 can be small.

  By the way, in the toroidal type continuously variable transmission as described above, as shown in FIGS. 9 and 10, for example, modularized devices have become mainstream. For example, in the stage before being accommodated in the casing 50, the input shaft 1, the input side disks 2 and 2, the output side disks 3 and 3, the output gear 4, the upper and lower yokes 23A and 23B, the trunnion 15, the power roller 11, The drive device 32, the pressing device 12, the fixing member 52 (upper plate) and the like are integrally assembled to form a variator module 43, and the variator module 43 is accommodated in the casing 50 and attached. In addition, the variator module 43 can be experimentally operated (rotated) before being housed in the casing 50 when the variator module 43 is assembled.

In such a variator module 43, the trunnion 15 that supports the power roller 11 is supported by the drive device 32.
The drive device 32 includes a drive piston 33 that supports and displaces the trunnion 15 and a cylinder body 31 that oil-tightly fits the drive piston 33 so as to be movable. The cylinder body 31 has cylinder chambers 31a and 31a, and drive pistons 33 and 33 are fitted in the cylinder chambers 31a and 31a in an oil-tight manner so as to be movable in the axial direction.
Further, a lower spherical post 68 fixed to the upper cylinder body 61 and the lower cylinder body 62 constituting the cylinder body 31 of the driving device 32, and an upper spherical post 64 fixed to the upper plate 52 are illustrated in FIG. As shown in FIG. 10, the columnar posts 69 are integrally joined vertically, and the pair of columnar posts 69 are connected to the upper plate 52 and the cylinder body 31 in the variator module 43.

  Further, the input shaft 1 penetrates through the upper and lower central portions of the columnar post 69. A pair of input side disks 2 and 2, output side disks 3 and 3, an output gear 4, a pressing device 12 and the like are supported on the input shaft 1. The pressing device 12 is of a hydraulic type that applies pressure by hydraulic pressure.

  In addition, the pair of output side disks 3 and 3 and the output gear 4 are integrated with the pair of output side disks 3 and 3 while the back surfaces of the pair of output side disks 3 and 3 are joined together. An integrated output-side disk 34 in which teeth 41 are provided on the outer peripheral surface of the output-side disks 3 and 3 to form an output gear 4 is used.

  Further, the columnar post 69 is formed on the upper surface of the upper cylinder body 61, and on the lower surface of the upper plate 52, a concave portion (inlay hole portion) into which a convex portion formed on the lower end surface of the columnar post 69 is fitted. It is provided and positioned by the recessed part (inlay hole part) which the convex part formed in the upper end surface of the columnar post fits. Further, the upper and lower spherical posts 64 and 68 of the pair of columnar posts 69 are inserted and fitted into the locking holes 19 of the upper and lower yokes 23A and 23B, and the pair of columnar posts 69 are formed by the yokes 23A and 23B. The interval of is regulated.

In the toroidal type continuously variable transmission having such a configuration, the input shaft 1, the input side disks 2 and 2, the output side disk 34, the output gear 4, the pressing device 12, the power roller 11, the trunnion 15 having the pivot 14, and the like. An assembly assembly A is constructed. A toroidal continuously variable transmission (variator module 43) is assembled by assembling the cylinder body 31 having the cylinder chamber 31a provided with the drive piston 33 to the assembly assembly A.
In this case, the drive rod 29 at the lower end portion of the trunnion 15 constituting the assembly assembly A is inserted and fixed in an axial through hole formed in the drive piston 33 provided in the cylinder body 31, and the drive rod A nut 29b is screwed into a male screw formed on the lower end of 29 and tightened, and a convex portion formed on the lower end surface of the post 69 is fitted into a concave portion formed on the upper surface of the upper cylinder body 61. Thus, the cylinder body 31 is assembled to the assembly assembly A by fixing with the bolts 69b.

JP 2007-332981 A

By the way, in the cylinder body 31 before being assembled to the assembly assembly A, the drive piston 33 provided in the cylinder chamber 31a is movable up and down. Therefore, when the cylinder body 31 is transported toward the assembly assembly A in order to assemble the cylinder body 31 to the assembly assembly A, the drive piston 33 may vibrate up and down in the cylinder chamber 31a.
When the drive piston 33 vibrates up and down, the seal members 33a and 33d provided on the outer peripheral surface of the drive piston 33 are worn, or the pressure receiving surface of the drive piston 33 hits the stopper 31b provided in the cylinder chamber 31a and is damaged. (Possibly causing foreign matter (contamination)).

  The present invention has been made in view of the above circumstances, and is a toroidal continuously variable transmission that can prevent vibration of a drive piston provided in a cylinder body when the cylinder body is transported for assembly in an assembly assembly. An object is to provide an assembly method.

In order to achieve the above object, an assembling method of a toroidal-type continuously variable transmission according to the present invention comprises an input side disk supported concentrically and rotatably with each inner surface facing each other, and The output side disc, a power roller sandwiched between the input side disc and the output side disc, and a pivot that is twisted with respect to the central axis of the input side disc and the output side disc. A trunnion that moves and is displaced in the axial direction of the pivot and that rotatably supports the power roller;
An assembly method for a toroidal continuously variable transmission that assembles a toroidal continuously variable transmission by assembling a cylinder body provided with a drive piston that displaces the trunnion in the axial direction of the pivot,
When transporting the cylinder body for assembly to the assembly assembly,
The drive piston is fixed to the cylinder body by a fixing jig.

In the present invention, since the drive piston provided in the cylinder body is fixed to the cylinder body by the fixing jig, it is possible to prevent the drive piston from vibrating when transported for assembling the cylinder body to the assembly assembly.
Therefore, it is possible to prevent problems such as wear of the seal member of the drive piston and damage to the pressure receiving surface of the drive piston.

  In the configuration of the present invention, it is preferable that the fixing jig includes a pair of upper and lower fixing members that are respectively provided on the upper and lower surfaces of the cylinder body and fix the upper and lower ends of the driving piston to the cylinder body. .

  According to such a configuration, the upper and lower ends of the drive piston are fixed to the cylinder body by the pair of fixing members, respectively, so that the drive piston can be reliably prevented from vibrating.

  According to the present invention, since the drive piston is fixed to the cylinder body by the fixing jig, it is possible to prevent the drive piston from vibrating when the cylinder body is transported to be assembled to the assembly assembly.

The cylinder body in the 1st Embodiment of this invention is shown, and the state before attaching a fixing jig is the perspective view which looked at the fixing jig from diagonally upward. It is sectional drawing which shows the state before attaching a fixing jig with a fixing jig. It is the perspective view which looked at the state before attaching a fixing jig from the bottom with the fixed axis. It is a perspective view which shows the state which attached the fixing jig similarly. It is sectional drawing which shows the state which attached the fixing jig same as the above. It is a perspective view which shows the cylinder body in the 2nd Embodiment of this invention. It is sectional drawing which shows an example of the conventional toroidal type continuously variable transmission. It is sectional drawing which follows the AA line in FIG. FIG. 5 is a perspective view showing a variator module of a conventional toroidal-type continuously variable transmission. FIG.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
The feature of the present invention is that the drive piston provided in the cylinder chamber is fixed to the cylinder body by a fixing jig, so this point will be described in detail below, and other parts are conventionally described. The same reference numerals are used and the description thereof is omitted or simplified.

(First embodiment)
As shown in FIGS. 1 to 5, the cylinder body 31 includes an upper cylinder body 61 and a lower cylinder body 62. The cylinder body 31 is provided with four cylinder chambers 31a.
A drive piston 33 is fitted in each cylinder chamber 31a in an oil-tight manner so as to be movable in the axial direction. As shown in FIGS. 1 and 5, the drive piston 33 includes a cylindrical shaft portion 33 b and a flange portion 33 c that is formed on the outer peripheral portion of the shaft portion 33 b and forms a pressure receiving surface. The ring-shaped seal member 33a is provided on the outer peripheral portion of the flange portion 33c, and the ring-shaped seal member 33d is provided on the outer peripheral portion of the shaft portion 33b. 1 to 5, a ring-shaped portion denoted by reference numeral 40 is for forming a recess (an inlay hole portion) into which a protrusion formed at the lower end portion of the post 69 is fitted.

When the drive piston 33 is fitted in the cylinder chamber 31a, the upper and lower ends protrude slightly from the upper and lower surfaces of the cylinder body 31, respectively, and move up and down within a range in which the flange portion 33c can move up and down. Possible (vibration possible).
Such a drive piston 33 is fixed to the cylinder body 31 by a fixing jig 51 as described below.

That is, the fixing jig 51 includes a pair of upper and lower fixing members 52 and 53 and a total of four insertion members 54 that are inserted into the cylindrical shaft portion 33 b of the drive piston 33.
The upper fixing member 52 includes a plate-like main body portion 52a formed in an X shape in plan view, and four cylindrical tube portions formed on the lower surfaces (back surfaces) of the four end portions of the main body portion 52a. 52b. The main body 52a is formed in such a size that the four cylindrical portions 52b are positioned immediately above the four cylinder chambers 31a when the central portion is arranged to coincide with the central portion of the upper surface of the cylinder body 31. Yes. Moreover, the hole 52c for inserting the said insertion member 54 is formed in the four edge parts of the main-body part 52a, respectively, coaxially with the cylinder part 52b.

The cylindrical portion 52b is formed in a size that can cover the upper end opening of the cylinder chamber 31a together with the upper end of the drive piston 33. In other words, the inner diameter of the cylindrical portion 52b is larger than the diameter of the upper end opening of the cylinder chamber 31a, and the height (axial length) of the cylindrical portion 52b extends from the upper surface of the cylinder body 31 to the drive piston. The height to the upper end surface of 33 is substantially equal to or slightly higher.
Therefore, when the cylinder portion 52b is arranged so as to cover the upper end opening of the cylinder chamber 31a and the lower end of the cylinder portion 52b is in contact with the upper surface of the cylinder chamber 31a, the upper end surface of the drive piston 33 is arranged. However, it is in contact with the lower surface (back surface) of the main body portion 52a in the cylindrical portion 52b, or a slight gap is provided between the upper end surface of the drive piston 33 and the lower surface of the main body portion 52a in the cylindrical portion 52b. It has become.
When a slight gap is provided between the upper end surface of the drive piston 33 and the lower surface (back surface) of the main body portion 52a in the cylindrical portion 52b, as shown in FIG. 5, the lower surface of the main body portion 52a in the cylindrical portion 52b ( It is preferable to provide a vibration absorbing member 52d formed of a ring-shaped rubber or the like having a thickness to fill the gap on the back surface.

  The lower fixing member 53 includes a plate-shaped main body portion 53a formed in an X shape in plan view, and four cylindrical tubes formed on the upper surfaces (back surfaces) of the four end portions of the main body portion 53a. Part 53b. The main body 53a is formed in such a size that the four cylindrical portions 53b are positioned directly below the four cylinder chambers 31a when the central portion is arranged so as to coincide with the central portion of the lower surface of the cylinder body 31. Yes. Further, screw holes 53c for screwing the lower end portions of the insertion members 54 are formed coaxially with the cylindrical portion 53b at the four end portions of the main body portion 53a. Note that the height of the cylindrical portion 53b is lower than the height of the cylindrical portion 52b. This is because the protruding lengths of the upper and lower ends of the drive piston 33 from the upper and lower surfaces of the cylinder body 31 are different.

The cylindrical portion 53b is formed to have a size capable of covering the lower end opening of the cylinder chamber 31a together with the lower end of the drive piston 33. That is, the inner diameter of the cylindrical portion 53b is larger than the diameter of the lower end opening of the cylinder chamber 31a, and the height (axial length) of the cylindrical portion 53b is from the lower surface of the cylinder body 31 to the driving piston. The height up to the lower end surface of 33 is almost equal to or slightly higher.
Therefore, when the cylindrical portion 53b is arranged so as to cover the lower end opening of the cylinder chamber 31a and the upper end of the cylindrical portion 53b is in contact with the lower surface of the cylinder chamber 31a, the lower end surface of the drive piston 33 Is in contact with the upper surface (rear surface) of the main body portion 52a in the cylindrical portion 53b, or a slight gap is provided between the lower end surface of the drive piston 33 and the upper surface (rear surface) of the main body portion 52a in the cylindrical portion 52b. It is supposed to be.
When a slight gap is provided between the lower end surface of the drive piston 33 and the upper surface (back surface) of the main body portion 52a in the cylindrical portion 53b, as shown in FIG. 5, the upper surface of the main body portion 53a in the cylindrical portion 53b (see FIG. It is preferable to provide a vibration absorbing member 53d formed of a ring-shaped rubber having a thickness to fill the gap on the back surface.

The insertion member 54 is a rod-shaped member that is inserted into the cylindrical shaft portion 33b of the drive piston 33 so that the upper and lower ends protrude from the upper and lower ends of the drive piston. In this embodiment, the insertion member 54 is a fixing bolt. 54.
A head 54 a is formed at the upper end of the insertion member 54, and a male screw 54 b that can be screwed into the screw hole 53 c is formed at the lower end.
Such an insertion member (fixing bolt) 54 is inserted from the hole 52c of the upper fixing member 52, and is inserted into the cylindrical shaft portion 33b of the drive piston 33 provided in the cylinder chamber 31a. The insertion member 54 engages and rotates a wrench in a hexagon wrench hole formed in the head 54a after the male screw 54b at the lower end thereof is screwed into the screw hole 53c of the lower fixing member 53. Thus, the cylinder body 31 is fixed to the drive piston 33 by the tightening.

When the four driving pistons 33 are fixed to the cylinder body 31 by the fixing jig 51, first, as shown in FIGS. 1 and 3, the upper fixing member 52 and the lower member are respectively provided on the upper side and the lower side of the cylinder body 31, respectively. A fixing member 53 on the side is arranged.
Next, the insertion member 54 is inserted into each of the four holes 52 c of the upper fixing member 52, the insertion member 54 is inserted into the cylindrical shaft portion 33 b of the drive piston 33, and the lower end of the insertion member 54 is further inserted. The male screw 54b is tightened after being screwed into the screw hole 53c of the lower fixing member 53.

When the insertion member 54 is tightened, the ends of the cylinder portions 52b and 53b of the pair of upper and lower fixing members 52 and 53 are in pressure contact with the upper and lower surfaces of the cylinder body 31, respectively, and the body portions 52a and 52b positioned in the cylinder portions 52b and 53b The back surface of 53 a is in pressure contact with the upper and lower end surfaces of the drive piston 33. When the vibration absorbing members 52d and 53d are provided on the back surfaces of the main body portions 52a and 53a, the back surfaces of the main body portions 52a and 53a located in the cylinder portions 52b and 53b are driven via the vibration absorbing members 52d and 53d. The piston 33 is in pressure contact with the upper and lower end surfaces.
As a result, as shown in FIGS. 4 and 5, the upper and lower ends of the drive piston 33 are sandwiched between the pair of fixing members 52 and 53, and then fixed to the upper and lower surfaces of the cylinder body 31.

When the fixing members 52 and 53 are fixed to the cylinder body 31 by the insertion member 54, the fixing members 52 and 53 may be fixed by using two or more insertion members 54. In this case, the insertion members 54 are respectively inserted into the holes 52c and 52c that are symmetrical with respect to the central portion of the fixing member 52 formed in an X shape, and the screw holes 53c that are opposed to the holes 52c and 52c, By screwing the male screw 54b of the insertion member 54 into 53c, it can be fixed in a balanced manner.
When the fixing members 52 and 53 are fixed to the cylinder body 31, the bolts are inserted into the through holes 69 a through which the bolts for fixing the lower ends of the posts 69 are inserted, in addition to the insertion members 54. It may be fixed by bolts using a hole provided in the center of the cylinder body 31.

The cylinder body 31 to which the drive piston is fixed as described above is transported toward the assembly assembly A, and the fixing jig 51 is removed immediately before the cylinder body 31 is assembled to the assembly assembly A. 31 is assembled to the assembly assembly A.
When the cylinder body 31 is transported, the drive piston 33 is fixed to the cylinder body 31 by the fixing jig 51, so that vibration of the drive piston can be prevented during transport.
Therefore, it is possible to prevent problems such as wear of the seal member 33a of the drive piston 33 and damage to the pressure receiving surface of the drive piston 33.

Further, since the upper and lower end portions of the drive piston 33 are sandwiched between the pair of fixing members 52 and 53, the upper and lower end portions of the drive piston 33 can be protected by the cylindrical portions 52 b and 53 b of the fixing members 52 and 53. Accordingly, it is possible to prevent damage to the upper and lower end portions of the drive piston 33 when the cylinder body 31 is transported or handled.
Further, if the vibration absorbing members 52d and 53d are provided on the back surfaces of the main body portions 52a and 53a, the vibration of the driving piston 33 can be absorbed by the vibration absorbing members 52d and 53d, and the seal member 33a of the driving piston 33 can be more reliably obtained. , 33d and damage to the pressure receiving surface of the drive piston 33 can be prevented.

  In the present embodiment, the fixing jig 51 is composed of a pair of upper and lower fixing members 52 and 53 formed in an X shape in plan view. However, the fixing members 52 and 53 are not limited to the X shape. . For example, the pair of upper and lower fixing members may be formed in a rectangular shape or a disc shape.

(Second Embodiment)
FIG. 6 shows a second embodiment of the present invention. Since this embodiment is different from the first embodiment in the configuration of the fixing jig, this point will be described below, and other common parts are denoted by the same reference numerals and description thereof is omitted. Or simplify.

In the present embodiment, as shown in FIG. 6, four fixing jigs 57 are used. The fixing jig 57 has a pair of upper and lower fixing members. The upper fixing member 58 has substantially the same configuration as the cylindrical portion 52b of the fixing member 52 in the first embodiment, and the fixing member 58 is formed in a cylindrical shape whose upper end is closed.
A hole having the same diameter as the hole 52c is formed on the upper surface of the fixing member 58, and the same insertion member 54 as the insertion member 54 of the first embodiment is inserted into the hole. A screw that is inserted into a cylindrical shaft portion (not shown) of a drive piston (not shown), and a male screw (not shown) at the lower end of the insertion member 54 is formed on a lower fixing member (not shown). It is screwed into the hole and then tightened. The lower fixing member has substantially the same configuration as the cylindrical portion 53b of the fixing member 53 in the first embodiment, and the fixing member is formed in a cylindrical shape with the lower end portion closed. A screw hole having the same diameter as the screw hole 53c is formed on the lower surface of the fixing member.

When the driving piston 33 is fixed to the cylinder body 31 by the fixing jig 57, as in the case of the first embodiment, first, an upper fixing member 58 and a lower member are respectively provided on the upper side and the lower side of the cylinder body 31, respectively. A fixing member on the side is arranged.
Next, the insertion member 54 is inserted into the hole 52 c of the upper fixing member 58, the insertion member 54 is inserted into the cylindrical shaft portion 33 b of the drive piston 33, and the male screw at the lower end of the insertion member 54 is further inserted. The screw 54b is screwed into the screw hole c of the lower fixing member and then tightened.

When the insertion member 54 is tightened, the end of the upper fixing member 57 is in pressure contact with the upper surface of the cylinder body 31, the end of the lower fixing member is in pressure contact with the lower surface of the cylinder body 31, and the upper fixing member The back surface of 57 and the back surface of the lower fixing member are in pressure contact with the upper and lower end surfaces of the drive piston 33.
As a result, the upper and lower ends of the drive piston 33 are held between the upper fixing member 57 and the lower fixing member, and then fixed to the upper and lower surfaces of the cylinder body 31.

In the present embodiment, the same effects as those of the first embodiment can be obtained, and the four drive pistons can be individually fixed to the cylinder body 31 by the fixing jig 57. For example, the number of drive pistons is increased. There is an advantage that it can easily cope with the case.
In the present embodiment, the fixing jig 57 is constituted by a cylindrical upper and lower fixing member, but the shape of the fixing member is not limited to a cylindrical shape. For example, it may be a rectangular tube shape or other tubular shapes.

A Assembly assembly 2 Input side disk 3 Output side disk 11 Power roller 14 Pivot 15 Trunnion 31 Cylinder body 33 Drive piston 31a Cylinder chamber 51, 57 Fixing jigs 52, 53, 58 Fixing member

Claims (2)

Power held between the input side disk and the output side disk, and the input side disk and the output side disk supported concentrically and rotatably with the respective inner surfaces facing each other. A roller, swings about a pivot that is twisted with respect to the center axis of the input side disk and the output side disk, is displaced in the axial direction of the pivot axis, and rotatably supports the power roller An assembly having a trunnion to
An assembly method for a toroidal continuously variable transmission that assembles a toroidal continuously variable transmission by assembling a cylinder body provided with a drive piston that displaces the trunnion in the axial direction of the pivot,
When transporting the cylinder body for assembly to the assembly assembly,
A method for assembling a toroidal continuously variable transmission, wherein the drive piston is fixed to the cylinder body by a fixing jig.   The said fixing jig is provided on the upper and lower surfaces of the cylinder body, respectively, and has a pair of upper and lower fixing members for fixing upper and lower ends of the drive piston to the cylinder body, respectively. Assembly method of toroidal type continuously variable transmission.

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