JPH0544808A - Trunnion support part for toroidal type continuously variable transmission and manufacture thereof - Google Patents

Abstract

PURPOSE:To reduce the cost of parts for supporting a trunnion by forming a circular hole and rising wall on a metal plate with an extrusion process and then lightening the metal plate by forming a through hole in the central part thereof, trimming and rounding four corners thereof with a laser process. CONSTITUTION:A metal plate 22 is provided in predetermined portions with preliminary holes 42, 43 by a punching process or the like. The respective preliminary holes 42, 43 are formed on a part of the inner surface with a conically depressed surface 44 by a process of depressing the inner surface of the respective preliminary holes. Further, the peripheral edge of the respective preliminary holes 42, 43 is subjected with a so-called barring process of extrusion process to form respective rising walls 25, 30 on the peripheral edges of respective circular holes 24, 28. While a rectangular through hole 23 is formed in the central part of the metal plate 22 by a laser process or the like, the metal plate 22 is trimmed and lightened by forming the four corners to have a quarter arc.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION A supporting member for a trunnion for a toroidal type continuously variable transmission according to the present invention and a method for manufacturing the same are used, for example, as a transmission for an automobile or in a lawn mower, a snowplow, an electric vehicle, a forklift, etc. A part of a toroidal-type continuously variable transmission that is used as a transmission for a light vehicle, and also as a transmission for rotating an auxiliary machine for an automobile engine at an appropriate speed regardless of fluctuations in the engine speed. Aim to reduce costs.

[0002]

2. Description of the Related Art A transmission for an automobile such as a motorcycle having a relatively small engine output (for example, 100 horsepower or less),
Riding lawn mowers, snow blowers, electric vehicles, forklifts, etc.
As a transmission for a light vehicle running at a low speed, and further as a transmission for rotating auxiliary equipment such as a compressor and a generator at an optimum speed irrespective of fluctuations in the engine speed, the transmission is schematically shown in FIGS. The use of such a toroidal type continuously variable transmission has been studied.

This toroidal type continuously variable transmission supports an input side disk 2 concentrically with an input shaft 1 and an output shaft 3 at an end thereof, as disclosed in Japanese Utility Model Laid-Open No. 62-71465. The output side disk 4 is fixed. The input shaft 1 is attached to the inner surface of a casing accommodating the toroidal type continuously variable transmission or to a support bracket provided in the casing.
In addition, trunnions 6, 6 that swing about a pivot 5 in a twisted position with respect to the output shaft 3 are provided.

Each trunnion 6, 6 is made of a metal material having sufficient rigidity, and the pivot 5 is provided on the outer surface of both ends. Further, the base end portion of the displacement shaft 8 is supported at the central portion of each trunnion 6, and each trunnion 6 is swung about the pivot shaft 5 to freely adjust the inclination angle of each displacement shaft 8. ..

Power rollers 9, 9 are rotatably supported around displacement shafts 8, 8 supported by the trunnions 6, 6, respectively. And each power roller 9, 9
Are sandwiched between the input side and output side disks 2 and 4.

The inner surfaces 2a, 4a of the input-side and output-side disks 2, 4 which face each other have cross-sections which are arcuate concave surfaces with the pivot 5 as the center. And
The peripheral surfaces 9a, 9a of the power rollers 9, 9 formed in a spherical convex surface are in contact with the inner side surfaces 2a, 4a.

A loading cam type pressurizing device 10 is provided between the input shaft 1 and the input side disc 2, and the pressurizing device 10 elastically directs the input side disc 2 toward the output side disc 4. Is pressed against. For example, JP-A-2
As described in detail in JP-A-261950, as shown in FIGS. 11 to 12, the pressurizing device 10 includes a cam plate 11 rotating with the input shaft 1 and a plurality of retainers 12 (for example, a retainer 12). It is composed of four rollers 13 and 13.

On one side surface of the cam plate 11 (right side surface in FIGS. 11 to 12), a cam surface 14 which is an uneven surface extending in the circumferential direction.
Of the input side disc 2 (see FIG. 11).
The same cam surface 15 is also formed on the left side surface of (~ 12). Further, the plurality of rollers 13, 13 are rotatable about an axis in the radial direction with respect to the center of the input shaft 1.

The operation of the toroidal type continuously variable transmission configured as described above is as follows.

When the cam plate 11 rotates along with the rotation of the input shaft 1, the cam surface 14 causes a plurality of rollers 13, 1 to rotate.
3 is pressed against the cam surface 15 on the outer surface of the input side disk 2. As a result, the input side disk 2 is pressed by the plurality of power rollers 9, 9 and at the same time, based on the engagement between the pair of cam surfaces 14, 15 and the plurality of rollers 13, 13. The input side disk 2 rotates. And
The rotation of the input side disk 2 is transmitted to the output side disk 4 via the plurality of power rollers 9, 9, and the output shaft 3 fixed to the output side disk 4 rotates.

When the rotational speeds of the input shaft 1 and the output shaft 3 are changed and when deceleration is first performed between the input shaft 1 and the output shaft 3, the trunnions 6, 6 centering on the pivot shafts 5, 5 are used.
By swinging as shown in FIG.
The displacement shafts 8, 8 are arranged such that the peripheral surfaces 9a, 9a of the input side disk 2 come into contact with the central portion of the inner side surface 2a of the input side disk 2 and the outer peripheral side portion of the inner side surface 4a of the output side disk 4.
Incline.

On the other hand, when increasing the speed, the trunnions 6, 6 are swung as shown in FIG. 12, and the peripheral surfaces 9a, 9a of the power rollers 9, 9 are located inside the input side disk 2. The displacement shafts 8 and 8 are tilted so that they are brought into contact with the outer peripheral portion of the side surface 2a and the central portion of the inner side surface 4a of the output side disk 4, respectively.

If the inclination angles of the displacement shafts 8, 8 are set in the middle between FIG. 11 and FIG. 12, between the input shaft 1 and the output shaft 3,
It is possible to obtain an intermediate gear ratio.

FIGS. 13 to 14 show a toroidal type continuously variable transmission that is actually used as a transmission for an automobile or the like, and a supporting device 7 for swingably supporting the trunnions 6, 6.
The structure of the part is shown. In the case of the structure shown in FIGS. 13 to 14, two sets of toroidal type continuously variable transmissions having the basic structure as shown in FIGS. 11 to 12 are provided in parallel with each other. This is because it is possible to transmit a large amount of power as a whole while preventing the load applied to the toroidal type continuously variable transmission from becoming excessive.

The trunnion 6 shown in FIGS.
The supporting device 7 of 6 has one lower link 16 having a shape as shown in FIG. 15, two upper links 17 having a shape as shown in FIG. 16, and these two upper links 17, 17. It is configured by combining one upper link post 18 having a shape as shown in FIG. 17 for connecting each other.

Among these parts 16, 17, 18, the four corners of the lower link 16 and the upper link 1
Circular holes 19 and 20 are formed in both end portions of 7, respectively. The pivots 21 and 21 provided at both ends of the trunnion 6 inside the circular holes 19 and 20 are swingably supported via rolling bearings 26 and 26, respectively.

[0017]

By the way, conventionally, the lower link 16, the upper link 17, and the upper link post 18 which constitute the supporting device 7 configured as described above are formed by hot forging a metal material. I was making it. That is,
After forming a material by hot forging a metal material, by performing cutting, heat treatment, and grinding processing on this material, the required shape, dimensional accuracy, and strength are obtained, and the surplus part is scraped off. I was trying to make it lighter.

In this way, the parts 16, 17, 18
When making, the heating equipment and forging equipment required for hot forging,
Not only the equipment that is relatively expensive and the running cost is high, but also the number of manufacturing steps is large.
It was inevitable that the production cost of 6, 17, 18 increased.

The supporting component for the trunnion for the toroidal type continuously variable transmission and the manufacturing method thereof according to the present invention have been invented in view of the above-mentioned circumstances.

[0020]

According to the present invention, there is provided a supporting member for a trunnion for a toroidal type continuously variable transmission and a method of manufacturing the trunnion, which comprises an input side disk rotatable with an input shaft, and a concentric arrangement with the input side disk. Moreover, the output side disk rotatably supported with respect to the input side disk and the displacement axis supported by a trunnion swinging around a pivot shaft in a twisted position with respect to the center axes of both the input side and output side disks. It is composed of a power roller that is freely supported and is sandwiched between both the input side and output side disks, and the inner side surfaces of the input side and output side disks that face each other are concave surfaces with arc-shaped cross sections, A tiger that is incorporated in a toroidal type continuously variable transmission in which the peripheral surface of the power roller is a spherical convex surface and the peripheral surface is in contact with the inner side surface, and supports the trunnion so that it can swing. On the support part and its manufacturing method.

Among these, the invention relating to the supporting component of the toroidal type continuously variable transmission trunnion described in claim 1 is
A desired hole is formed in a metal plate having a predetermined size and thickness, and a standing wall is formed by extrusion processing at the peripheral edge of the hole.

Further, the invention relating to the method for manufacturing the supporting member of the trunnion for the toroidal type continuously variable transmission according to the second aspect of the invention is such that a through hole having a desired size is formed in a metal plate having a predetermined size and thickness. The standing wall is formed at the peripheral edge of the through hole by forming and forming the peripheral edge of the through hole by extrusion.

[0023]

In the case of the supporting member for the trunnion for the toroidal type continuously variable transmission and the manufacturing method thereof according to the present invention constructed as described above, the weight of the supporting member and the manufacturing cost can be reduced.

[0024]

1 to 3 show supporting members for a trunnion for a toroidal type continuously variable transmission according to the present invention. Figure 1 of this
Is the lower link 16 and FIG. 2 is the upper link 17.
3 shows the upper link posts 18, respectively. Each of these members 16, 17, and 18 has a standing wall formed at the peripheral edge of the through hole by forming a desired through hole by extrusion processing in a metal plate having a predetermined size and thickness.

First, in the case of the lower link 16 shown in FIG. 1, a rectangular through hole 23 is formed in the central portion of a metal plate 22 having sufficient rigidity such as a steel plate to form the metal plate 22 in a rectangular frame shape. And at the four corners of the metal plate 22,
Circular holes 24, 24 are formed, respectively. Short cylindrical standing walls 25, 25 are formed at the peripheral portions of the circular holes 24, 24. Then, the inner peripheral surface of each of the circular holes 24, 24 and the inner peripheral surface of each of the standing walls 25, 25 are continuous to form a single cylindrical surface, and the rolling bearing 2 is formed inside the cylindrical surface.
Outer rings 27 and 27 (see FIG. 14) that form the parts 6 and 26 can be fitted and fixed freely.

In the illustrated embodiment, the metal plate 22 is
In addition to the circular holes 24, 24 for fixing the outer rings 27, 27, circular holes 28, 29 for inserting screws or the like for fixing the metal plate 22 to the housing of the toroidal type continuously variable transmission are formed. There is. Further, in the peripheral portions of the circular holes 28, 28,
Vertical walls 30, 30 similar to the peripheral portions of the circular holes 24, 24 are formed.

Next, in the case of the upper link 17 shown in FIG. 2, circular holes 32, 32 are formed at both ends of a metal plate 31 having sufficient rigidity, such as a steel plate, and
Short cylindrical standing walls 33, 33 are provided at the peripheral portions of the circular holes 32, 32.
Is formed. The inner peripheral surface of each circular hole 32, 32 and the inner peripheral surface of each standing wall 33, 33 are connected to form a single cylindrical surface, and the rolling bearing 26 is formed inside the cylindrical surface. The outer rings 27, 27 (see FIG. 14) that form the first and second parts 26, 26 can be fitted and fixed freely.

A substantially rectangular through hole 34 is formed in the central portion of the metal plate 31, and a standing wall 35 is formed at the peripheral edge of the through hole 34.
Is formed. Around the through hole 34, a plurality of circular holes 36, 36 are formed.

Further, in the case of the upper link post 18 shown in FIG. 3, a rectangular through hole 38 is formed in the central portion of a metal plate 37 having sufficient rigidity, such as a steel plate, so that the metal plate 37 is rectangular. This metal plate 37 is formed in a frame shape.
Bend edges 39 by bending both side edges of
39 is formed to improve the bending rigidity of the metal plate 37.

Further, rectangular through holes 40, 40 (see FIG. 8 which will be described later) are provided at both end portions of the metal plate 37 in the length direction.
(See (D)). And each through hole 40, 40
Short rectangular tubular standing walls 41, 41 are formed at the peripheral edge of the. Then, the inner peripheral surface of each of the through holes 40, 40 and each of the standing walls 4
A single rectangular cylindrical surface is formed by connecting the inner peripheral surfaces of 1, 41 to each other, and locking blocks 51, 51 formed by scraping a metal block are fitted inside the rectangular cylindrical surface. It is fixed by welding. Each locking block 51, 51 is
A through hole 34 in the central portion of the upper link 17 shown in FIG.
In addition, it has a size such that it can be inserted into the standing wall 35 formed at the peripheral portion of the through hole 34.

The lower link 16, the upper link 17, and the upper link post 18 as described above are manufactured as follows.

First, when the lower link 16 is manufactured, as shown in FIG.
As shown in FIGS. 4 (A) and 5 (A), a square metal plate 22 having sufficient rigidity is prepared.
As shown in (B), the prepared hole 4 is provided at a predetermined portion of the metal plate 22.
2 and 43 are drilled. This drilling work is performed by punching press work. Of these pilot holes 42, 43, the pilot holes 42, 42 formed at the four corners of the metal plate 22 are circular holes 24, 24 at the four corners of the lower link 16 (see FIG. 1 and FIG. 4 (E)). What, pilot holes 43, 4 in the center of both sides
3 are circular holes 28, 2 in the central portion on both sides of the lower link 16.
It will be 8.

Since each of the pilot holes 42 and 43 is formed into a circular hole 24 or 28 having a larger inner diameter by an extrusion process which is performed subsequent to the surface pressing process described below, each of the pilot holes 42 and 4 is formed.
The inner diameter of 3 is the circular holes 24 and 28 after completion and each circular hole 2
It is made sufficiently smaller than the inner diameters of the standing walls 25 and 30 (see FIGS. 1 and 4D and 4E) formed on the peripheral portions of 4 and 28. For example, the inner diameters of the circular holes 24, 24 and the standing walls 25, 25 formed at the four corners of the completed lower link 16 are D, and the inner diameters of the lower holes 42, 42 for forming the circular holes 24, 24 are In the case of d, the inner diameter D after completion is about 1.4 to 2 times the inner diameter d of the pilot holes 42, 42 (D≈ (1.
4 to 2) d) is preferable. The same applies to the relationship between the pilot holes 43, 43 and the circular holes 28, 28.

As described above, the metal plate 22 has the lower hole 42,
If 43 is drilled, then FIG. 4 (C) and FIG.
As shown in (C), by performing so-called surface pressing, which presses the inner surface of each lower hole 42, 43, a mortar-shaped crushed surface 44, 44 is formed on a part of the inner surface of each lower hole 42, 43. Form. The crushed surfaces 44, 44 are formed on the standing walls 25, 3 formed by the extrusion process in the subsequent extrusion process.
This is to prevent cracks from occurring at the edge of 0. Therefore, the crushed surfaces 44, 44 are formed on the inner surface of the portion set on the die side, which is the female mold, during the extrusion process. However, this surface pressing can be omitted if the metal plate 22 used has a sufficiently high extensibility (is easily stretched).

The pilot holes 42 and 43 are formed, and each pilot hole 4 is further formed.
Metal plate 2 having crushed surfaces 44, 44 formed on the inner surfaces of 2, 43
2 is then set in an extrusion machine and each pilot hole 4
Extrusion processing called so-called burring processing is applied to the peripheral portions of the holes 2 and 43, and as shown in FIG. 4D and FIG. 28
At the same time, standing walls 25 and 30 are formed at the peripheral portions of the circular holes 24 and 28, respectively.

After the circular holes 24 and 28 and the standing walls 25 and 30 having a predetermined size are formed in the metal plate 22 in this manner, then, as shown in FIGS. 1 and 4 (E), A rectangular through hole 23 is formed in the center of the metal plate 22, and four corners of the metal plate 22 are formed into a quarter arc shape, so-called trimming and thickness reduction are performed. It is preferable to perform the trimming and meat removal operations by a method such as a laser cutter that does not distort the metal plate. This is a circular hole 2 that has already been processed along with trimming and meat removal work.
This is to prevent distortion of the vertical walls 28 and the vertical walls 25 and 30. In addition, small circular holes 29, 29 are provided around the circular hole 28.
Is processed by a drilling machine or the like to complete the lower link 16.

In the case of the embodiments shown in FIGS. 4 to 5, the lower holes 42 and 43 are formed in the metal plate 22 in order to form the circular holes 24 and 28 having the standing walls 25 and 30 at the peripheral edge portions. After that, the standing walls 25 and 30 are formed on the peripheral portions of the lower holes 42 and 43 by burring, but the circular holes 24 and 28 having the standing walls 25 and 30 are formed on the peripheral portions. As the extrusion process, the burring process as described above and the process method shown in FIG. 6 can be adopted.

That is, as shown in FIG. 6 (A), a part of the metal plate 22 having a predetermined thickness is subjected to extrusion press working, so that one side (upper surface of FIG. 6) of this metal plate 22 has a circular shape. After forming the convex portion 45 and the circular concave portion 46 on the other surface (the lower surface in the figure), respectively, as shown in FIG.
By punching out the central portion of 5, the peripheral portion of the convex portion 45 is left as the standing wall 25 (30) and the inside of the concave portion 46 is formed as the circular hole 24 (28).

Next, when the upper link 17 is manufactured, an elongated rectangular metal plate 31 having sufficient rigidity is prepared as shown in FIG. 7A, and this metal is prepared as shown in FIG. 7B. Board 3
Pilot holes 47 and 48 are formed in a predetermined portion of No. 1 by punching press work. Of these pilot holes 47, 48, the pilot holes 47, 47 formed at both ends of the metal plate 31 are circular holes 32, 32 at both ends of the upper link 17 (see FIGS. 2 and 7E, 7F). (See), central pilot hole 48
Serves as a through hole 34 in the central portion of the upper link 17.

Since each of the pilot holes 47, 48 is made into a circular hole 32 and a through hole 34 having a larger inner diameter by an extrusion process which is performed following the surface pressing process described below, each of the pilot holes 47, 48. The inner diameter of is substantially smaller than the inner diameters of the completed circular hole 32, through hole 34, and standing walls 33, 35 formed at the peripheral portions of the holes 32, 34, as in the case of manufacturing the lower link 16 described above. I'll do it.

As described above, the metal plate 31 has the pilot hole 47,
If 48 is drilled, then as shown in FIG.
By performing so-called surface pressing, which presses the inner surface of each lower hole 47, 48, a mortar-shaped crushed surface 49, 49 is formed on a part of the inner surface of each lower hole 47, 48, and extrusion is performed subsequently. At the time of processing, the standing wall 33 formed by this extrusion processing,
It prevents the occurrence of cracks at the edges of 35 (see FIGS. 2 and 7D).

The pilot holes 47 and 48 are formed, and each pilot hole 4 is further formed.
Metal plate 3 having crushed surfaces 49, 49 formed on the inner surfaces of 7, 48
1 is then set in an extrusion machine and each pilot hole 4
Extrusion processing called so-called burring processing is applied to the peripheral edge portions of 7, 48, and as shown in FIG. 7D, the diameters of the respective pilot holes 47, 48 are expanded to form circular holes 32 and through holes 34. , The standing walls 33, respectively on the peripheral portions of the holes 32, 34,
35 is formed.

After the circular hole 32, the through hole 34, and the standing walls 33 and 35 having a predetermined size are formed in the metal plate 31 in this manner, then, as shown in FIG. The meat removal work for cutting out the peripheral portion of the metal plate 31 is performed by a method such as a laser cutter that does not distort the metal plate.

Further, as shown in FIG. 7 (F), the through hole 3
Small circular holes 36, 36 around 4 are machined by a drilling machine or the like to complete the upper link 17.

Further, when the upper link post 18 is manufactured, a long rectangular metal plate 37 having sufficient rigidity is prepared as shown in FIG. 8 (A), and this metal is prepared as shown in FIG. 8 (B). By bending both side edges of the plate 37 at a right angle, the bent edges 39, 39 are formed, and the bending rigidity of the metal plate 37 is improved.

Next, as shown in FIG. 8 (C), rectangular pilot holes 50, 50 are punched at both ends of the metal plate 37 by punching press work, and then as shown in FIG. 8 (D). The peripheral portions of the pilot holes 50, 50 are extruded, so-called burring process, to expand the pilot holes 50, 50 into the through holes 40, 40, and the through holes 40, 4
Standing walls 41, 41 are formed at the peripheral edge of 0, respectively.

On the other hand, the locking block 51 constituting the upper link post 18 is prepared separately from the metal plate 37, and is provided on the outer peripheral surface of a rectangular parallelepiped metal block 52 as shown in FIG. 9 (A). ) As shown in FIG.
The through holes 40, 40 and the standing walls 41, 41 are formed to have a size that allows them to be fitted together without a gap.

The metal plate 37 processed in the steps shown in FIGS. 8A to 8D and the locking block 51 made as shown in FIGS. 9A and 9B are shown in FIG. They are combined as shown in (A). That is, one end portion of the locking blocks 51, 51 is connected to the through holes 40, 40 of the metal plate 37 and the standing wall 4.
1, 41 and the locking block 51, 5
1 The concave grooves 53, 53 on the outer peripheral surface are exposed from the end edges of the standing walls 41, 41. Then, by welding the metal plate 37 and the locking blocks 51, 51, both members 37, 51
Secure each other.

Then, as shown in FIG. 10B, a trimming operation for forming the through hole 38 in the central portion of the metal plate 37 is performed by a method such as a laser cutter that does not distort the metal plate 37.

Further, as shown in FIG. 10 (C), a part of the metal plate 37 is subjected to a shaving process to complete the upper link post 18.

[0051]

The supporting component of the trunnion for a toroidal type continuously variable transmission and the method of manufacturing the same according to the present invention are constructed and operate as described above, and therefore can be manufactured by a facility which is relatively inexpensive and has a low running cost. Moreover, since the number of manufacturing steps is small, it is possible to reduce the manufacturing cost of each component.

[Brief description of drawings]

FIG. 1 is a perspective view of a lower link according to the present invention.

FIG. 2 is a perspective view of an upper link of the same.

FIG. 3 is a perspective view of an upper link post of the same.

FIG. 4 is a perspective view showing a method of manufacturing a lower link in the order of steps.

FIG. 5 is a partial enlarged cross-sectional view showing a first example of a method of forming a circular hole and a standing wall in the order of steps.

FIG. 6 is a partially enlarged sectional view showing a second example in the order of steps.

FIG. 7 is a perspective view showing the method of manufacturing the upper link in the order of steps.

FIG. 8 is a perspective view showing, in the order of steps, a method for processing a metal plate that constitutes an upper link post.

FIG. 9 is a perspective view showing a method of processing the locking block in the order of steps.

FIG. 10 is a perspective view showing, in the order of steps, a method of combining a metal plate and a locking block into an upper link post.

FIG. 11 is a side view showing a basic configuration of a toroidal type continuously variable transmission that is a target of the present invention in a state at the time of maximum deceleration.

FIG. 12 is a side view showing the same state at maximum acceleration.

FIG. 13 is a partial sectional view showing an example of an actual toroidal type continuously variable transmission.

14 is a cross-sectional view taken along the line AA of FIG.

FIG. 15 is a perspective view of a conventional lower link.

FIG. 16 is a perspective view of a conventional upper link.

FIG. 17 is a perspective view of a conventional upper link post.

[Explanation of symbols]

 1 Input Shaft 2 Input Side Disk 2a Inner Side Surface 3 Output Shaft 4 Output Side Disk 4a Inner Side Surface 5 Axis 6 Trunnion 7 Support Device 8 Displacement Axis 9 Power Roller 9a Circumferential Surface 10 Pressurizing Device 11 Cam Plate 12 Retainer 13 Roller 14 Cam Surface 15 cam surface 16 lower link 17 upper link 18 upper link post 19 circular hole 20 circular hole 21 pivot 22 metal plate 23 through hole 24 circular hole 25 standing wall 26 rolling bearing 27 outer ring 28 circular hole 29 circular hole 30 standing wall 31 metal plate 32 yen Hole 33 Standing wall 34 Through hole 35 Standing wall 36 Circular hole 37 Metal plate 38 Through hole 39 Bending edge 40 Through hole 41 Standing wall 42 Lower hole 43 Lower hole 44 Crushed surface 45 Convex portion 46 Recessed 47 Lower hole 48 Lower hole 49 Crushed surface 50 Lower Hole 51 Locking block 52 Metal block 53 Recessed groove

Claims (2)

[Claims] 1. An input side disk rotatable with an input shaft, an output side disk concentrically arranged with the input side disk and rotatably supported with respect to the input side disk, and both input side and output side disks. It is composed of a power roller rotatably supported by a displacement shaft supported by a trunnion that swings around a pivot shaft that is in a twisted position with respect to the center shaft, and is sandwiched between both input side and output side disks. The inner side surfaces of the input side disk and the output side disk facing each other are concave surfaces each having an arcuate cross section, and the peripheral surface of the power roller is a spherical convex surface, and the peripheral surface and the inner side surface are brought into contact with each other. A trunnion supporting part that is incorporated in a toroidal type continuously variable transmission and swingably supports the trunnion, and that forms a desired hole in a metal plate having a predetermined size and thickness. In addition, a supporting member of the trunnion for a toroidal type continuously variable transmission, which is formed by extruding a standing wall on the peripheral portion of the hole. 2. An input side disk rotatable with an input shaft, an output side disk arranged concentrically with the input side disk and rotatably supported with respect to the input side disk, and both input side and output side disks. It is composed of a power roller rotatably supported by a displacement shaft supported by a trunnion that swings around a pivot shaft that is in a twisted position with respect to the center shaft, and is sandwiched between both input side and output side disks. The inner side surfaces of the input side disk and the output side disk facing each other are concave surfaces each having an arcuate cross section, and the peripheral surface of the power roller is a spherical convex surface, and the peripheral surface and the inner side surface are brought into contact with each other. A method of manufacturing a trunnion support component that is incorporated in a toroidal type continuously variable transmission and swingably supports the trunnion, the metal plate having a predetermined size and a desired size having a desired size. A method for manufacturing a support component for a trunnion for a toroidal-type continuously variable transmission, in which a standing wall is formed at the peripheral edge of the through hole by forming a through hole having a groove and extruding the peripheral edge of the through hole by extrusion.