JPH09280342A - Retainer for loading cam device and manufacturing method thereof - Google Patents

Abstract

(57) An object of the present invention is to provide a holder for a loading cam device which is inexpensive in manufacturing cost and has stable operation, and a manufacturing method thereof. SOLUTION: A first cam surface formed as unevenness in the circumferential direction and a second cam surface formed as unevenness in the circumferential direction and opposed to the first cam surface in the axial direction. A ring-shaped retainer mounted between the first cam surface and the second cam surface, pockets formed at a plurality of circumferential positions of the retainer, and inside of each pocket. In a loading cam device comprising a plurality of rolling elements that abut on the first cam surface and the second cam surface in a state of being rollably held, the cage is made of a metal plate,
A first projecting portion that projects to one side of the metal plate is provided on the inner edge side of each pocket, and a second projecting portion that projects to the other surface side of the metal plate is provided on the outer edge side of each pocket. It is formed by pressing a metal plate, and the first protrusion and the second protrusion respectively extend along the circumferential direction along the gap between the first cam surface and the second cam surface. Are arranged.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The loading cam device according to the present invention is used, for example, in a state of being incorporated in a toroidal type continuously variable transmission used as a transmission for an automobile. The present invention relates to a cage that constitutes such a loading cam device and a method for manufacturing the cage.

[0002]

2. Description of the Related Art For example, as a transmission for an automobile, a conventional transmission shown in FIG.
The use of a toroidal type continuously variable transmission as schematically shown in 0 has been studied. This toroidal type continuously variable transmission
For example, as disclosed in Japanese Utility Model Laid-Open No. 62-71465, an input side disk 2 is provided at the end of an input shaft 1 and an output shaft 3 is provided.
While supporting the output side disks 4 at the ends of,
The input side disk 2 includes power rollers 6 and 6 rotatably supported by displacement shafts 5 and 5 whose tilt angles are adjustable.
It is configured to be sandwiched between the output side disk 4 and the output side disk 4.

Inner side surfaces 2a and 4a of the input side disk 2 and the output side disk 4 which are opposed to each other are concave surfaces having an arcuate cross section, and the peripheral surfaces 6a of the power rollers 6 and 6,
6a and inner side surfaces 2a and 4a are brought into contact with each other. Further, between the input shaft 1 and the input side disk 2, the input side disk 2
Is provided with a loading cam device 7 which is a pressing device for rotating the output disk 4 while pressing it in the axial direction. The loading cam device 7 engages with the input shaft 1 and rotates with the input shaft 1 on one side of an input disc 8 (see FIG. 10).
On the right side) of the first cam surface 9 formed as unevenness in the circumferential direction, and on the outer side surface (left side of FIG. 10) of the input side disk 2 as unevenness formed in the circumferential direction. The second cam surface 10 and a plurality of rollers 12, 12 sandwiched between the first cam surface 9 and the second cam surface 10 while being rotatably held by the circular ring-shaped cage 11. It has and.

The roller 12 is, for example, Japanese Patent Laid-Open No. 1-29935.
The one disclosed in Japanese Patent No. 8 is used. The roller 12 described in this publication has a narrow width as shown in FIG.
An element 14 in which a small-diameter protrusion 13 is formed at the center of one end face is combined in series as shown in FIG.
Ream). The roller 12 formed by combining a plurality of such elements 14 is used while being rotatably held inside each rectangular pocket 15 formed at a plurality of circumferential positions of the cage 11. In use, the elements 14 rotate independently of each other. This is to absorb the speed difference between the inner peripheral side and the outer peripheral side.

In the case of the toroidal type continuously variable transmission in which the loading cam device 7 having the above-described structure is incorporated, when the input disk 8 is rotated by the input shaft 1, the first cam surface 9 is rotated.
The plurality of rollers 12 are pressed against the second cam surface 10. As a result, the input side disc 2 is pressed toward the output side disc 4, and the inner side surfaces 2 of both discs 2 and 4 are pressed.
a and 4a and the peripheral surfaces 6a and 6a of the power rollers 6 and 6 strongly contact each other. Further, the input side disk 2 rotates based on the pressing force of each roller 12 and the convex portion of the second cam surface 10, and the rotation of the input side disk 2 is transferred to the output side disk 4 via the power rollers 6 and 6. The output shaft 3 to which the output side disk 4 is fixed is transmitted and rotates in the opposite direction to the input shaft 1. In addition, between the first cam surface 9 and the second cam surface 10 and 12,
Lubricating oil is supplied in order to prevent seizure during pressing.

When the rotary motion is transmitted from the input shaft 1 to the output shaft 3 in this way, the peripheral surfaces 6a, 6a of the power rollers 6, 6 are the inner surface 2a of the input side disk 2 as shown in FIG. Part from the outer periphery and the inner surface 4a of the output side disk 4
Displacement shafts 5, so that they come into contact with the parts from the center of
When 5 is tilted, the speed is increased between the input shaft 1 and the output shaft 3. On the contrary, the peripheral surface 6 of each power roller 6, 6
When the displacement shafts 5 and 5 are inclined so that a and 6a come into contact with the center side 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, respectively, Deceleration is performed between 1 and the output shaft 3. Then, if the inclination angles of the displacement shafts 5 and 5 are set to intermediate values, an intermediate gear ratio can be obtained between the input shaft 1 and the output shaft 3.

By the way, in order to put the loading cam device 7 into use in a toroidal type continuously variable transmission constructed and configured as described above, it is necessary to improve the following points. That is, when the loading cam device 7 is not in operation and the rotational motion is not transmitted from the input disk 8 to the input side disk 2, as shown in FIG. 13, the first cam surface 9 and the second cam surface 9 are When the surface 10 and the surface 10 are close to each other, the cage 11 is not largely displaced in the thickness direction (vertical direction in FIG. 13).
Therefore, the rollers 12, 12 held in the pockets 15, 15 of the retainer 11 become
There is no large vertical displacement within 5. On the other hand, when the loading cam device 7 is operating and the rotational motion is being transmitted from the input disk 8 to the input side disk 2, as shown in FIG. 14, the first cam surface 9 and the second cam surface 9 The surface 10 tends to move away from each other. As a result, the cage 1
1 can be largely displaced in its thickness direction, and the roller 1 held in each pocket 15,
2 and 12 tend to slip out of the pockets 15 and 15.

There is no particular problem when the fluctuation of the torque transmitted through the loading cam device 7 is small, but when a large torque is suddenly applied to the input disk 8, The distance between the first cam surface 9 and the second cam surface 10 is large, and the rollers 12, 12 are in the pocket 15,
It is possible that it will be greatly exuded from within 15. In this way, when the rollers 12, 12 largely protrude from the pockets 15, 15, the rolling surfaces 12a, 12a of the rollers 12, 12 come into contact with the edges 15a, 15a of the pockets 15, 15, respectively.
There is a possibility that the durability of the rolling surfaces 12a, 12a may be impaired. Also, the rollers 1 of the first cam surface 9 and the second cam surface 10
There is a bias in lubrication between Nos. 2 and 12. In addition, 1
The protrusions 13, 14 are formed on the end faces of the elements 14, 14 that form the elements 2, 12.
13 is formed, these protrusions 13, 13
If the edges of pockets 15 and 15 mesh with each other,
Even when the distance between the first cam surface 9 and the second cam surface 10 is about to be shortened, the rollers 12, 12 are in the pockets 15, 15
There is the inconvenience of not returning to the inside.

In order to eliminate such inconvenience, Japanese Utility Model Laid-Open No. 5-75551 discloses a loading cam device 7'having a structure as shown in FIG. 15, for example. In this conventional structure, the pockets 15, 15 formed at the annular retainer 11 mounted between the first cam surface 9 and the second cam surface 10 have openings at both ends thereof.
The eaves-shaped protrusions 16, 16
And The pockets 15 and 1 which are the distances between the edges of the protrusions 16 and 16 formed so as to face each other.
The width dimension w of the opening 5 is smaller than the outer diameter dimension D of the rollers 12, 12 held in the pockets 15, 15. Further, the width dimension W of the middle portion of each pocket 15 sandwiched between the front and back protrusions 16, 16 is made larger than the outer diameter dimension D of the rollers 12, 12. That is, the following equation 1 is used.

[0010]

## EQU1 ## w <D <W In the conventional loading cam device 7'configured as described above, the width w of the opening of each pocket 15 is 1
Since it is smaller than the outer diameter dimension D of 2, each roller 12 does not slip out from the inside of each pocket 15. Therefore, the loading cam device 7'having such a structure is incorporated in a toroidal type continuously variable transmission, and the input disk 8 having the first cam surface 9 and the input disk 2 having the second cam surface 10 are formed. If torque is transmitted between the
Even when the first cam surface 9 and the second cam surface 10 are largely separated from each other as shown in FIG. 1
2 does not come out of each pocket 15 of the cage 11 significantly.

As a result, the rolling surface 12a of the roller 12 does not hit the edge of the pocket 15. Further, the deviation of lubrication between the first cam surface 9 and the second cam surface 10 and the places 12, 12 is also eliminated. Further, the projections 13, 13 formed on the end faces of the elements 14, 14 constituting the rollers 12, 12 do not mesh with the edge of the pocket 15, and the rollers 12, 12 do not return to the inside of the pockets 15, 15. Things will disappear.

Although not shown here, the above-mentioned Japanese Utility Model Laid-Open No. 5-75551 discloses the following structures in addition to the structure shown in FIG.

A structure in which a pressing spring is attached to both front and rear openings of each pocket to prevent the rollers from falling out of each pocket.

A structure in which the front and back surfaces of the cage have an uneven shape that substantially conforms to the shapes of the first cam surface and the second cam surface, and the thickness dimension of the cage is increased in the vicinity of each pocket. By forming protrusions that do not interfere with the cam surface at the position where the pocket is sandwiched from both sides in the circumferential direction on both sides of the cage or at the position where the pocket is sandwiched from both sides in the diameter direction, A structure in which the thickness of the cage in the vicinity is made slightly smaller than the outer diameter of the roller, and the thickness of the portion away from each pocket is sufficiently smaller than the thickness in the vicinity.

A leaf spring is provided between the first cam surface and the second cam surface on the front and back surfaces of the cage between the adjacent pockets, and the cage causes the leaf cam to move the cage. Alternatively, the structure is such that it is pressed in a direction away from the second cam surface.

Similar to the structure shown in FIG. 15, even if the first cam surface 9 and the second cam surface 10 are largely separated from each other, the positions of the retainer 11 are the same in both of these structures. And about 10 in the middle. Therefore, the roller 12 does not largely slip out of the pocket 15 of the cage 7, and the rolling surface of the roller 12 does not hit the edge of the pocket 15. Also, the roller 12 and the cam surfaces 9, 10
There is no deviation in lubrication between and. Moreover, even if the roller 12 is provided with a protrusion, the roller 12 will not return to the inside of the pocket 15.

Further, as shown in FIGS. 1 to 7 of Japanese Patent Application No. 7-7377, the cage 11 is made of a metal plate and exists between the pockets 15 which are circumferentially adjacent to each other. At least some of the plurality of plate portions have a first projecting portion projecting to one surface side of the metal plate, and the remaining plate portions have at least a projecting portion on the other surface side of the metal plate. The retainer 11 is formed by pressing a metal plate, and the first protrusion and the second protrusion are arranged substantially evenly in the circumferential direction. To simplify the manufacturing cost of the loading cam device.

[0018]

[Problems to be Solved by the Invention]
The structure disclosed in Japanese Patent No. 75551 can effectively prevent the rollers from slipping out of the pockets, but it is troublesome to process the cage (in the case of the structure of FIG. 15), or a spring is attached to the cage. However, the assembling work is troublesome (in the case of the structure shown in FIG. 15), which increases the manufacturing cost of the loading cam device.

Further, the device disclosed in Japanese Patent Application No. 7-7377 can easily manufacture and assemble the cage at low cost, but when the opposing cam surfaces are opened during operation, Since there is room for the cage to rattle against the cam surface,
When the cage moves in the plate thickness direction and the roller 12 protrudes from the pocket 15, the rolling surface 12a of the roller 12 may come into contact with the edge 15a of the pocket 15 and impair the durability of the rolling surface 12a. is there. In addition, there is a gap in lubrication between the first cam surface 9 and the second cam surface 10 and 12, 12 (FIG. 16). In addition, in FIG. 16, 18 is a 1st protrusion part and 19 is a 2nd protrusion part.

The present invention has been made under the circumstances as described above, and an object of the present invention is to provide a cage for a loading cam device and a method for manufacturing the same, which is intended to reduce the manufacturing cost and stabilize the operation. To do.

[0021]

According to the present invention, there is provided a first cam surface formed as an unevenness in a circumferential direction and an unevenness formed in a circumferential direction, and the first cam surface is formed in an axial direction in the first cam surface. Second cam surfaces facing each other, a ring-shaped cage mounted between the first cam surface and the second cam surface, and pockets formed at a plurality of circumferential positions of the cage. And a cage for a loading cam device, which comprises a plurality of rolling elements that abut on the first cam surface and the second cam surface while being rotatably held inside each of the pockets. The above-mentioned object of the invention is that the cage is made of a metal plate, and a first projecting portion projecting to one side of the metal plate is provided on the inner edge side of each pocket, and the first projecting portion is provided on the outer edge side of each pocket. The second protrusions protruding to the other side of the metal plate are respectively attached to the metal plate. Are formed by subjecting the first and second protrusions to circumferentially extending along the gap between the first and second cam surfaces. It is achieved by Also, the cage can be manufactured by locally forming the metal plate by pressing so as to create the protrusion.

[0022]

BEST MODE FOR CARRYING OUT THE INVENTION By incorporating the loading cam device of the present invention configured as described above into a toroidal type continuously variable transmission, the input side disc is pushed from the input shaft to the input side disc while axially pressing the input side disc. The action itself at the time of transmitting the rotational movement is possible as in the case of the loading cam device incorporated in the conventional toroidal type continuously variable transmission described above. Moreover, in the case of the loading cam device of the present invention, even if the first cam surface and the second cam surface are largely separated from each other, the presence of the first projecting portion and the second projecting portion with respect to these both cam surfaces is , The position of the cage is maintained without shifting from the center of both cam surfaces. Therefore, the rolling element never slips out of the pocket of the cage,
The edge of the pocket does not hit the rolling surface of the rolling element. Further, there is no deviation in lubrication between the rolling elements and the cam surfaces. Further, even if the rolling element is provided with a protrusion, the rolling element will not return to the inside of the pocket.

Embodiments of the present invention will be described below with reference to the drawings.

1 to 5 show a first embodiment of the present invention. The feature of the present invention is to prevent the rollers 12, which are rolling elements, from coming out of the pockets 15 of the cage at all even when the first cam surface 9 and the second cam surface 10 are largely separated from each other. Since it is in the shape of the retainer, and the configuration and operation of the other parts are similar to those of the conventional loading cam device described above, illustration and description thereof are omitted.

The cage 11a constituting the loading cam device of the present invention is made of a metal plate such as a mild steel plate or an aluminum alloy. This metal plate as a material has a thickness dimension t (t = D / 4 to D / 3) that is 1/4 to 1/3 of the diameter D of the roller 12 that is a rolling element to be held. The retainer 11a is formed into a substantially circular ring shape by pressing such a metal plate, and rectangular pockets 15 are formed at a plurality of locations (four locations in the illustrated example) in the circumferential direction. There is. The rollers 12, which are rolling elements, are rotatably held inside the pockets 15, respectively.

A plurality of (four in the illustrated example) plate portions 1 each having an arc shape on the inner diameter side of each pocket 15
7a has a metal plate on one side (see FIG.
The first projecting portions 18 projecting toward the front surface side (the lower side in FIG. 2) are formed by pressing the metal plate. The plurality of (four in the illustrated example) plate portions 17b, which are present outside the pockets 15 and each have an arc shape, are provided on the other surface side (the back surface side in FIG. 1) of the metal plate over substantially the entire length thereof. , The second protrusions 19 protruding upward (in FIG. 2) are similarly formed by pressing the metal plate. The protrusion amount t ′ of each of the first protrusion 18 and the second protrusion 19 is about the same as the thickness t of the metal plate (t).
= T '). Therefore, the total thickness dimension T of the retainer 11a, which is the distance from the tip edge of the first protrusion 18 to the tip edge of the second protrusion 19, is twice the protrusion amount t'and the thickness of the metal plate. It is the sum of the size t.

[0027]

## EQU2 ## T = t + 2t 'Such a retainer 11a is formed by the following first to fourth steps, all of which are performed by press working. (1) First step (roughing step) FIGS. 6 and 7 show the work shape of the first step. In this first step, a metal plate, which is a raw material, is pressed between the male mold and the female mold, and the cage 11b having a ring shape is punched out. The inner diameter dimension and outer diameter dimension of the stamped retainer 11b are adjusted to the finished retainer 11a, but the four portions of the pocket portion 15 correspond to the protrusions 18 and 19 on the inner peripheral side and the outer peripheral side, respectively. Make a shape that overhangs by the volume that you want to use. That is, the first protruding portion 21 is provided on the inner peripheral side.
And a second projecting portion 22 is provided on the outer peripheral side. Incidentally, the alternate long and short dash line in the figure shows the outline of the finished product. (2) Second Step (Overhang Molding) FIG. 8 is a diagram showing the processing principle of overhang molding, in which the left half shows the state before molding and the right half shows the state after molding. In this second step, another male die (punch 24) and another female die (die 2)
The retainer 11b punched out in the first step between 5) and
The first projecting portion 18 and the second projecting portion 19 are formed by bulging at four inner peripheral edges and four outer peripheral edges. That is, the retainer 11b punched out in the first step is sandwiched by the work support plates 23 and 23 ', the punch 24 is inserted into the inner circle of the retainer 11b, and the die 25 is disposed on the outer peripheral edge portion. By pressing the punch 25 in the X direction and the die 25 in the Y direction, the first protruding portion 18 can be formed on the inner peripheral edge and the second protruding portion 19 can be formed on the outer peripheral edge, respectively. At this time, it is preferable that the overhang is formed by separating either the outer peripheral side or the inner peripheral side of the pocket 15 from the edge of the pocket 15. As a result, the female die in the following third step and fourth step can sufficiently support the cage, and accurate press working can be achieved. The dashed-dotted line in the right half of the figure shows the shape of the pocket 15. (3) Third step (pocket roughing step) In this third step, the 15 pockets of the cage formed by overhanging in the second step are punched and formed between another male die and female die. To do. At this time, pocket 15
The inner size of should be smaller than the inner size after completion. (4) Fourth Step (Pocket Finishing) In this fourth step, the peripheral edge portion of the pocket punched out in the first step is shaving processed between another male mold and female mold, The inner size of the pocket 15 is set to a predetermined value.

In the case of the loading cam device of the present invention which is constructed by including the retainer 11a manufactured through the first to fourth steps as described above, the first cam surface 9 and the second cam surface are provided. Even if 10 and 10 are greatly separated, both cam surfaces 9
Due to the presence of the first protrusion 18 and the second protrusion 19 facing the cams 10 and 10, the position of the retainer 11a does not deviate from the intermediate portion of both cam surfaces 9 and 10. That is, the retainer 11a is incorporated into the loading cam device,
The roller 12 held in the pocket 15 of the cage 11a
With the cams aligned with the recesses of the cam surfaces 9 and 10, the leading edge of the first protrusion 18 is in the recess of the first cam surface 9, and the leading edge of the second protrusion 19 is in the second cam. The concave portions of the surface 10 are opposed to each other. Therefore, although the cage 11a is formed of a metal plate having a thickness t, the cage 11a is formed of a metal plate having a thickness T (= t + 2t '). , The vertical direction of FIGS. 2, 4, and 5) is restricted.

For this reason, the roller 12 does not slip out of the pocket 15 of the cage 11a, and the edge 15a of the pocket 15 does not hit the rolling surface 12a of the roller 12. Further, the deviation of lubrication between the rollers 12 and the first cam surface 9 and the second cam surface 10 is reduced. In addition, 1
Even if the projections 13 and 12 are provided on the Nos. 2 and 12, the projections 13 do not engage with the edges 15a and 15a, and the rollers 12 do not return to the inside of the pocket 15. Particularly, in the case of the loading cam device of the present invention, the pocket 15 and the first protrusion 18 are provided.
Also, the cage 11a having the second protrusions 19 can be formed only by a simple pressing process including the first step to the fourth step. Therefore, it is possible to reduce the manufacturing cost of the retainer 11a and the loading cam device incorporating the retainer 11a.

Next, FIG. 9 shows a second embodiment of the present invention. In the case of the present embodiment, front and back protrusions 18a, 18b and 19a, 19b are alternately formed on the inner peripheral edge and the outer peripheral edge of each pocket 15 of the retainer 11c made of a metal plate.

FIG. 5 shows a state in which such a retainer 11c is incorporated in the loading cam device, and the rollers 12 retained in the pockets 15 of the retainer 11c are aligned with the recesses of the cam surfaces 9 and 10. Similarly to the above, the tip edges of the second protrusions 19a and 19b are formed in the recesses of the first cam surface 9 and the second cam surface 10, respectively.
The tip edge of 8b alternately faces the concave portions of the first cam surface 9 and the second cam surface 10. Therefore, the same operational effect as in the case of the first embodiment described above is obtained. By doing so, when the number of pockets is an even number, the front side and the back side of the cage are not distinguished, and the rotational balance can be further secured.

As is clear from the above description, if the thickness of the metal plate forming the cage is increased, the first and second protrusions unlike the case of the present invention are not formed. ,
It is possible to limit the axial displacement of the cage and prevent the rollers from slipping out of the pocket of the cage. However, if the thickness of the metal plate is increased, a large force is required to punch the pockets, a large press machine is required, and not only the equipment cost increases, but also the weight of the cage. In addition, the material cost increases. An increase in the weight of the cage not only causes an increase in the weight of the unit toroidal type continuously variable transmission, but also causes a decrease in performance due to an increase in the moment of inertia, which is not preferable. If a structure in which the first and second protrusions are formed on a relatively thin metal plate is adopted as in the present invention, such a problem does not occur.

Further, the present invention is not limited to the first and second embodiments described above, and for example, the roller 12 as a rolling element may not have the protrusion 13 formed thereon.
Further, even when the rolling element is a substitute ball of the roller 12 and the groove for rolling the ball is formed in the first cam surface 9 and the second cam surface 10, the same operation is performed.

[0034]

Since the loading cam device of the present invention is constructed and operates as described above, it is possible to reliably prevent the occurrence of a malfunction due to the rolling element coming out of the pocket of the retainer, and to eliminate the toroidal shape. The operation of the transmission can be stabilized. Further, since the cage is lightweight and can be easily processed, there is an advantage that a good performance toroidal type continuously variable transmission can be manufactured at low cost.

[Brief description of drawings]

FIG. 1 is a plan view of a cage showing an embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

3 is a perspective view of the cage shown in FIG. 1. FIG.

FIG. 4 is a sectional view showing a usage state of the embodiment of the present invention in a state in which a part of the loading cam device is circumferentially cut.

FIG. 5 is a cross-sectional view showing a state during operation of the embodiment of the present invention.

FIG. 6 is a plan view of a cage blank used in an embodiment of the present invention.

FIG. 7 is a sectional view taken along the line BB of FIG. 6;

FIG. 8 is a processing principle diagram for producing the cage of the present invention from a blank.

FIG. 9 is a perspective view showing a second embodiment of the present invention.

FIG. 10 is a side view showing a basic configuration of the toroidal type continuously variable transmission in a state of maximum acceleration.

FIG. 11 is a front view showing an element forming a roller.

FIG. 12 is a front view showing a state where rollers are held by a cage.

FIG. 13 is a cross-sectional view similar to FIG. 4, showing a non-operating state of the loading cam device that incorporates a retainer that does not consider bias prevention.

14 is a cross-sectional view showing a state during operation of FIG.

FIG. 15 is a cross-sectional view similar to FIG. 4, showing a state when the conventional loading cam device incorporating a retainer in consideration of bias prevention is not in operation.

FIG. 16 is a principle view showing a defective state in the device described in Japanese Patent Application No. 7-7377.

[Explanation of symbols]

 1 Input Shaft 2 Input Side Disk 2a Inner Side Surface 3 Output Side 4 Output Side Disk 4a Inner Side Surface 5 Displacement Axis 6 Power Roller 6a Circumferential Surface 7 Loading Cam Device 8 Input Disc 9 First Cam Surface 10 Second Cam Surface 11 , 11a Cage 12 Roller 12a Rolling surface 13 Projection 14 Element 15 Pocket 15a Edge 16 Projection 17 Plate part 18, 18a First projection 19, 19a Second projection 20 Processing reference hole 21 First overhang Part 22 Second overhang part 23, 23 'Work support plate 24 Punch 25 Die

Claims (2)

[Claims] 1. A first cam surface formed as an unevenness in the circumferential direction, and a second cam formed as an unevenness in the circumferential direction and opposed to the first cam surface in the axial direction. Surface, a ring-shaped cage mounted between the first cam surface and the second cam surface, pockets formed at a plurality of circumferential positions of the cage, and inside each of the pockets. In a loading cam device comprising a plurality of rolling elements that abut on the first cam surface and the second cam surface while being held to be rollable, the cage is made of a metal plate, The inner edge side of the pocket has a first projecting portion projecting to one side of the metal plate, and the outer edge side of each pocket has a second projecting portion projecting to the other surface side of the metal plate. Is formed by pressing the first protrusion and the second protrusion. The protrusions are arranged circumferentially along the gap between the first cam surface and the second cam surface, respectively. 2. A method of manufacturing a retainer for a loading cam device, wherein the metal plate of claim 1 is locally formed by pressing to create the protrusion.