JP2000130529A - Friction type multistage roller transmission - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the lubricating performance while stably supplying the lubricating oil to a friction contact part by providing an oil-containing member so as to contact with at least one of rolling surfaces of a sun roller, an outer ring and a roller arranged between the sun roller and the outer ring. SOLUTION: A friction type multistage roller transmission is formed by arranging each four first and second rollers 13, 14 having a different diameter from each other in a space formed between a sun roller 11 and an outer ring 12 in the peripheral edge direction with an equal space. An annular oil included member 28 is provided in a space between the sun roller 11 and a first roller 13 so as to contact with at least one of the peripheral surface of the sun roller 11 and the small diameter side peripheral surface of the first roller 13. Namely, the oil included member 28 contacts with the peripheral surface of the sun roller 11 at the inner peripheral surface thereof, while contacting with the small diameter side peripheral surface of the first roller 13 at the outer peripheral surface thereof. As the oil-containing member 28, a porous member made of the sintered material and impregnated with the lubricating oil is used.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a friction type multi-stage roller transmission for reducing or increasing input rotation through rollers arranged in multiple stages in a radial direction.

[0002]

2. Description of the Related Art A typical traction drive having a constant speed change ratio is a planetary roller type power transmission device as shown in FIGS. 27 (a) and 27 (b). This is such that each gear constituting the planetary gear is replaced by a roller or a ring-shaped member, and a sun roller 1 and a ring 2 arranged so that their axes coincide with each other, and a sun roller 1 and a ring 2 are formed between the sun roller 1 and the ring 2. A plurality of planetary rollers 3 arranged in a space to be formed, and a carrier 4 for rotatably holding the planetary rollers 3 at equal intervals in a circumferential direction. In this device, for example, power is transmitted between the sun roller 1 and the carrier 4 by restricting the rotation of the ring 2 in the circumferential direction. Such planetary roller type power transmission devices are classified into two types according to the manner of contact between the planetary roller 3 and the carrier 4. That is, FIG. 27A shows a type in which the planetary roller 3 and the carrier 4 are in contact with each other on the inner peripheral surface of the hollow planetary roller 3, and FIG. 4 is a contact type.

[0003] A set of planetary roller type power transmission devices as described above can be set to a gear ratio of 10 or more. However, the contact surface pressure between the sun roller 1 and the planetary roller 3 and the ring 2 and the planetary roller From the balance of the contact surface pressure of 3, usually
An appropriate gear ratio is 3 to 6.

[0004] Therefore, as a power transmission device capable of obtaining a larger gear ratio, there is a friction type multi-stage roller transmission. As shown in FIG. 28 or 29, the sun roller 11 and the outer ring 1 are arranged so that their axes are aligned.
2 and two or more types arranged at equal intervals in the circumferential direction in a space formed between the sun roller 11 and the outer ring 12 (two types of rollers 13 and 14 in FIG. 28, and rollers 13 to 15 in FIG. 29). And three types of rollers 13 to 15). Here, the number of each of the rollers 13 to 15 is three or more. And those rollers 13-1
5, at least one type of roller (the roller 13 in FIG. 28 and the rollers 13 and 14 in FIG. 29) is constituted by a plurality of cylinders, and the rolling contact surface of the friction contact portion having two different turning radii ( By providing the outer peripheral surface, a larger gear ratio can be secured.

FIG. 28 shows two types of rollers, a first roller 13 and a second roller 14, each provided between a sun roller 11 and an outer ring 12, and only the first roller 13 has two types of rotation radii. This is an example in which a running surface is given. When the rotation (revolution) of the first roller 13 and the second roller 14 around the sun roller 11 is restricted, the gear ratio e is e =
Represented by _{(R 0 R 1L) / (} R S R 1S).

On the other hand, the first roller 13 and the second roller 1
In the case where the rotation of the outer ring 12 is restricted instead of restricting the rotation (revolution) around the sun roller 11 of FIG.
Speed ratio e is, e = a _{(R 0 R 1L) / (} R S R 1S) -1.

FIG. 29 shows three types of rollers, a first roller 13, a second roller 14, and a third roller 15, provided between the sun roller 11 and the outer ring 12, respectively. 14 is an example in which a rolling surface having two types of turning radii is provided to 14. When the rotation (revolution) of the first to third rollers 13 to 15 around the sun roller 11 is restricted, the gear ratio e is e = (R ₀ R _1L R _2L ) /
(R _S R _1S R _2S ).

On the other hand, when the rotation of the outer ring 12 is restricted instead of restricting the rotation (revolution) of the first to third rollers 13 to 15 around the sun roller 11, the gear ratio e
Is e = (R ₀ R _1L R _2L ) / (R _S R _1S R _2S ) +1.

By increasing the number of stages in the radial direction as described above, it is possible to avoid a large size in the axial direction and to obtain a large gear ratio.

FIG. 30 is a structural view of a friction type multi-stage roller transmission. Here, the sun roller 11 and the outer ring 12
Two types of rollers, a first roller 13 and a second roller 14, are provided between them, and the number of the first roller 13 and the number of the second roller 14 are four each. A high-speed shaft 16, one end of which is a sun roller 11, is supported by a housing 18 by two bearings 17. Between the high-speed shaft 16 and an outer ring 12 arranged coaxially, the outer peripheral surface of the sun roller 11 has friction. The first roller 13 that comes into contact with the outer ring 1
The second rollers 14 that are in frictional contact with the inner peripheral surface of the second roller 2 are arranged at equal circumferential intervals. Here, the first roller 13 has two types of rolling surfaces by being formed of a plurality of cylinders. The second roller support shafts 19 of the same number as the second rollers 14 are implanted in the housing 18.
Is supported by the second roller support shaft 19 via the bearing 20, the rotation of the second roller 14 around the sun roller 11 is restricted, and as a result, the rotation of the first roller 13 around the sun roller 11 is also restricted. The housing 21 has a low-speed shaft 22 supported by two bearings 23. The housing 21 and the housing 18 are connected by bolts 24 so that the low-speed shaft 22 and the high-speed shaft 16 are coaxially arranged. The rotation of the outer ring 12 is transmitted to the low-speed shaft 22 by connecting the outer ring 12 and the low-speed shaft 22 with bolts 25 and nuts 26. Here, the outer ring 12 and the low-speed shaft 22 are separate members, and are connected by bolts 25 and nuts 26. However, the low-speed shaft 22 is formed so that one end of the low-speed shaft 22 becomes an inner circumferential friction contact portion. The outer ring 12 and the outer ring 12 may be formed integrally.

In the friction type multi-stage roller transmission shown in FIG. 30, the rotation (revolution) of the first roller 13 and the second roller 14 around the sun roller 11 is restrained, and the power is generated by the rotation of the sun roller 11 and the outer ring 12. Is transmitted.

As another method, rotation (revolution) of the first roller 13 and the second roller 14 around the sun roller 11 is performed.
FIG. 31 shows a structural diagram of a friction type multi-stage roller transmission in which the rotation of the outer ring 12 is restricted instead of restricting the rotation of the outer ring 12. 30, the high-speed shaft 22 and the outer ring 12
Between the first roller 13 and the second roller 1
4 are arranged in pressure contact at equal circumferential intervals. The outer ring 12 is fixed to the housing 17 by bolts 27, so that its rotation is restricted. The second roller 14 is supported by the second roller support shaft 19 via the bearing 20. The power is the rotation of the sun roller 11 and the first roller 13 and the second roller 1.
4 is transmitted by rotation (revolution) around the sun roller 11.

[0013]

In order to stably operate a friction type multi-stage roller transmission for a long period of time, lubricating oil is supplied stably so that a sufficient oil film can be formed at each friction contact portion. It is necessary to. When using oil bath lubrication or forced lubrication to supply pumped lubricating oil as the lubrication method, sufficient lubricating oil can be supplied to each friction contact part. Cause an increase. In order to reduce the size of the device and reduce the manufacturing cost, it is desirable that the lubrication method be grease lubrication. However, in the case of grease lubrication, grease is removed from the raceway surface during operation, and lubrication tends to be insufficient. Especially in the friction type multi-stage roller transmission,
In order to reduce the surface pressure and improve the rolling fatigue life,
Each friction contact portion is in line contact. As described above, when the contact form in each friction contact portion is line contact, the removal of grease from the rolling surface during operation is more remarkable than in the case of point contact, and damage due to insufficient lubrication is likely to occur.

Therefore, the present invention has been proposed in view of the above-mentioned problems, and an object of the present invention is to improve the lubricating performance by supplying a stable lubricating oil to each friction contact portion. .

[0015]

As a technical means for achieving the above-mentioned object, a friction type multi-stage roller transmission according to the present invention comprises a sun roller and an outer ring which are arranged so that their axes coincide. Two or more types of rollers (first to n in order of proximity to the sun roller) in the space formed between them
Are arranged at equal intervals in the circumferential direction in a press-contact state, and among these rollers, at least the first roller is formed of a plurality of cylinders so that the outer peripheral surface which is a rolling surface having two different turning radii is formed. In the friction type multi-stage roller transmission, the outer peripheral surface which is the rolling surface of the sun roller, the inner peripheral surface which is the rolling surface of the outer ring, and the outer peripheral surface which is the rolling surface of the roller disposed between the sun roller and the outer ring Of which
An oil-impregnated member in contact with at least one rolling surface is provided.

Further, in the friction type multi-stage roller transmission according to the present invention, two or more types of rollers are press-contacted in a space formed between a sun roller and an outer ring arranged so that their axes coincide with each other. Each of these rollers is arranged at equal intervals in the circumferential direction, and at least one of the rollers is constituted by a plurality of cylinders, so that a friction type having an outer peripheral surface which is a rolling surface having two different rotational radii is provided. In the multi-stage roller transmission, at least one oil-impregnated member that contacts at least one of the inner peripheral surface that is the rolling surface of the outer ring or the outer peripheral surface that is the rolling surface of the roller that frictionally contacts the outer ring, The oil-impregnated member is provided in the space between the rollers that make frictional contact, and is supported so as to maintain the relative position to the roller that makes frictional contact with the outer ring. .

Further, in the friction type multi-stage roller transmission according to the present invention, two or more types of rollers are press-contacted in a space formed between a sun roller and an outer ring arranged so that their axes coincide with each other. Each of the rollers is arranged at equal intervals in the circumferential direction, and at least one of the rollers has an outer peripheral surface that is a rolling surface having two different rotation radii by being formed of a plurality of cylinders. In a friction type multi-stage roller transmission in which a roller that comes into frictional contact with a ring is rotatably supported by a housing or a roller support shaft implanted on a low-speed shaft, an outer peripheral surface that is a rolling surface of a roller that comes into frictional contact with an outer ring is provided. A lubricant holding member having a concave surface formed on at least one of an opposing surface or a surface opposing an outer peripheral surface which is a rolling surface of a roller in frictional contact with the roller. At least one frictional member is provided in a space between the rollers in frictional contact with the outer ring, and the lubricant holding member is supported so as to maintain a relative position to the roller in frictional contact with the outer ring. Multi-stage roller transmission.

Further, in the friction type multi-stage roller transmission according to the present invention, two or more types of rollers are press-contacted in a space formed between a sun roller and an outer ring which are arranged so that their axes coincide with each other. Each roller is arranged at equal intervals in the circumferential direction, and among these rollers, the roller that comes into frictional contact with the outer ring is rotatably supported by a roller support shaft implanted in the housing or the low-speed shaft, and is pressed against the roller. In a friction-type multi-stage roller transmission having an outer peripheral surface that is a rolling surface having two different rotating radii because a roller that is in frictional contact is constituted by a plurality of cylinders, the roller is in pressure contact with the roller that is in frictional contact with the outer ring. At least one oil-impregnated member in contact with the outer peripheral surface on the large diameter side, which is the other rolling surface of the roller that comes into frictional contact with the roller, It is obtained by supporting the support shaft.

Further, in the friction type multi-stage roller transmission according to the present invention, two or more types of rollers are press-contacted in a space formed between a sun roller and an outer ring arranged so that their axes coincide with each other. Each roller is arranged at equal intervals in the circumferential direction, and among these rollers, the roller that comes into frictional contact with the outer ring is rotatably supported by a roller support shaft implanted in the housing or the low-speed shaft, and is pressed against the roller. In a friction-type multi-stage roller transmission having an outer peripheral surface that is a rolling surface having two different rotating radii because a roller that is in frictional contact is constituted by a plurality of cylinders, the roller is in pressure contact with the roller that is in frictional contact with the outer ring. At least one oil-impregnated member in which the surface facing the large-diameter-side outer peripheral surface, which is the other rolling surface of the roller in frictional contact, is formed as a concave surface,
It is supported by a housing or a roller support shaft implanted on a low-speed shaft.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Various embodiments of a friction type multi-stage roller transmission according to the present invention will be described below with reference to FIGS. FIGS. 1 to 26 other than FIG. 24 show two types of rollers (rollers 13 and 14) between the sun roller 11 and the outer ring 12 of FIG. 30 or FIG. 31 at equal intervals in the circumferential direction. FIG. 30 shows an embodiment in which the present invention is applied to a friction type multi-stage roller transmission.
The same or corresponding parts as those in FIG. 31 are denoted by the same reference numerals and description thereof will be omitted. FIG. 24 shows a friction type multi-stage roller transmission in which five types of rollers (rollers 13 to 15) are arranged at equal intervals in the circumferential direction between the sun roller 11 and the outer ring 12 in FIG. This shows an embodiment in which the present invention is applied, and the same or corresponding portions as those in FIG. 29 are denoted by the same reference numerals and description thereof is omitted.

When the first roller 13 has two types of rolling surfaces and is formed in an H-shaped section in the axial direction, a space in which an oil-impregnated member can be provided between the sun roller 11 and the first roller 13. Exists. An embodiment in which this space is used is shown in FIGS.

That is, in the embodiment shown in FIG. 1, the annular oil-impregnated member 28 which comes into contact with at least one of the outer peripheral surface of the sun roller 11 and the outer peripheral surface on the small diameter side of the first roller 13 is attached to the sun roller 11 and the first roller. It is provided in the space between the rollers 13. Here, the oil-impregnated member 28 is in contact with the outer peripheral surface of the sun roller 11 on the inner peripheral surface, and is in contact with the outer peripheral surface on the small diameter side of the first roller 13 on the outer peripheral surface.

The oil-impregnated member 28 may be, for example, a porous member formed of a sintered material impregnated with a lubricating oil, a porous member formed of a foamable resin such as polyethylene impregnated with a lubricating oil, polyethylene, or the like. Formed by solidifying a mixture of the resin and the lubricating oil by heating and cooling.

As shown in FIG. 1, an oil-impregnated member 28 is provided so as to contact at least one of the outer peripheral surface of the sun roller 11 and the outer peripheral surface of the first roller 13 on the small diameter side. Oil-impregnated member 2 with the operation of
8 contains the lubricating oil on the rolling surface of sun roller 11 and / or
Alternatively, the oil is stably supplied to the rolling surface of the first roller 13, and an oil film is stably formed at each friction contact portion, so that lubrication performance can be improved.

In the embodiment shown in FIG. 2, an annular oil-containing member 29 that contacts at least one of the outer peripheral surface of the sun roller 11 and the outer peripheral surface of the second roller 14 is provided between the sun roller 11 and the first roller 13. Provided in space. Here, the oil-impregnated member 29 has a sun roller 1 on its inner peripheral surface.
1 and is in contact with the outer peripheral surface of the second roller 14 at the outer peripheral surface. As a result, the lubricating oil contained in the oil-impregnated member 29 is stably supplied to the rolling surface of the sun roller 11 and / or the rolling surface of the first roller 13, and the oil film is stably formed on each frictional contact portion. It can be formed to improve lubrication performance.

The embodiment shown in FIG. 3 corresponds to the first embodiment shown in FIG.
Instead of the oil-impregnated member 28 that is in local contact (line contact) with the small-diameter outer peripheral surface of the roller 13, an oil-impregnated member 30 that is in contact with the outer peripheral surface of the first roller 13 in a surface-contact state is provided. Is provided in a space between the sun roller 11 and the first roller 13. The oil-impregnated member 30 has a concave surface 3 on its outer peripheral surface which is in surface contact with the outer peripheral surface on the small diameter side of the first roller 13.
0a are provided at equal intervals in the circumferential direction by the number of the first rollers 13. Thereby, the oil-impregnated member 30 and the first roller 13
Of the oil-impregnated member 30 come into surface contact with each other.
Is easily supplied to the outer peripheral surface on the small-diameter side of the first roller 13, and the lubricating performance can be further improved.

There is also a space between the second roller 14 that comes into frictional contact with the outer ring 12 where an oil-containing member can be provided. An embodiment in which this space is used is shown in FIGS.

That is, in the embodiment shown in FIG. 4, the cylindrical oil-impregnated member 3 is in contact with at least one of the outer peripheral surface of the second roller 14 and the inner peripheral surface of the outer ring 12.
1 is a second roller 1 in frictional contact with the outer ring 12.
It is provided in the space between four. Here, the oil-impregnated member 31 has an outer diameter such that its outer peripheral surface contacts at least one of the outer peripheral surface of the second roller 14 and the inner peripheral surface of the outer ring 12.

As shown in FIG. 4, a cylindrical oil-impregnated member 31 contacting at least one of the outer peripheral surface of the second roller 14 and the inner peripheral surface of the outer ring 12 is brought into contact with the outer ring 12 by friction. By providing the space between the two rollers 14, the lubricating oil contained in the oil-containing member 31 is stabilized on the rolling surface of the sun roller 11 and / or the rolling surface of the second roller 14 during operation of the friction type multi-stage roller transmission. As a result, the oil film is stably formed at each friction contact portion, and the lubrication performance can be improved.

In the embodiment shown in FIG. 5, a hollow annular oil-impregnated member 3 is used instead of the cylindrical oil-impregnated member 31 shown in FIG.
2 is a second roller 14 in frictional contact with the outer ring 12
It is provided in the space between them. Thus, the weight of the oil-containing member 32 can be reduced, and the friction type multi-stage roller transmission can be reduced in weight.

In the embodiment shown in FIG. 6, a fan-shaped oil-impregnated member 33 which comes into contact with at least one of the outer peripheral surface of the second roller 14 and the inner peripheral surface of the outer ring 12 is provided. Is provided in a space between the second rollers 14 which makes frictional contact with the second roller 14. Here, the oil-impregnated member 33
Is a concave surface 3 which is in surface contact with the outer peripheral surface of the second roller 14.
3 a or at least one of the convex surfaces 33 b that come into surface contact with the inner peripheral surface of the outer ring 12. Thereby, the outer peripheral surfaces of the oil-impregnated member 33 and the third roller 14 and / or
Alternatively, the inner peripheral surface of the outer ring 12 comes into contact with the outer ring 12 in a surface contact state, and the lubricating oil contained in the oil-containing member 33 is easily supplied, so that the lubricating performance can be further improved.

In the embodiment shown in FIG. 7, instead of the oil-impregnated member 33 shown in FIG. 6, the outer peripheral surface of the second roller 14, the inner peripheral surface of the outer ring 12, and the outer peripheral surface of the large diameter side of the first roller 13 are formed. Among them, a fan-shaped oil-impregnated member 34 that comes into contact with at least one rolling surface in a surface-contact state is provided in a space between the second rollers 14 that comes into frictional contact with the outer ring 12. Here, the oil-impregnated member 34 has a large concave surface 34 a that makes surface contact with the outer peripheral surface of the second roller 14, a convex surface 34 b that makes surface contact with the inner peripheral surface of the outer ring 12, and a large-diameter outer peripheral surface of the first roller 13. It has at least one of the small concave surfaces 34c that come into surface contact with the surface. Thereby, the oil-impregnated member 34
At least one of the outer peripheral surface of the second roller 14, the inner peripheral surface of the outer ring 12, and the outer peripheral surface on the large diameter side of the first roller 13 comes into contact with each other in a surface contact state. The lubricating oil contained is easily supplied, and the lubricating performance can be further improved.

When the first roller 13 has two types of rolling surfaces and is formed in an H-shaped cross section in the axial direction, an oil-impregnated member that comes into contact with the large-diameter outer peripheral surface of each of the first rollers 13. Can be provided. The embodiment is shown in FIG.

That is, as shown in FIG.
Oil-impregnated members 35 having concave surfaces 35a in contact with the large-diameter outer peripheral surface of the roller 13 at equal intervals in the circumferential direction by the number of the first rollers 13 are coaxial with the sun roller 11 on both left and right sides in the axial direction of the second roller 14 group. It is provided above. The oil-impregnated member 35 is provided with notches 35b of the same number as the number of the second roller support shafts 19 in the outer peripheral portion at equal intervals in the circumferential direction, and the notches 35b are engaged with the second roller support shaft 19. Thus, the relative position of the oil-containing member 35 with respect to the first roller 13 can be maintained. Here, as shown in FIG. 30, the second roller support shaft 19 is implanted in the housing 18 when the rotation (revolution) of the second roller 14 around the sun roller 11 is restricted, and as shown in FIG. When the rotation of the outer ring 12 is restricted, it is implanted on the low-speed shaft 22.

As shown in FIG. 8, the oil-impregnated member 35 is provided so as to be in contact with the outer peripheral surface of the first roller 13 on the large-diameter side.
5 can be stably supplied to the rolling surface of each first roller 13, and an oil film can be stably formed at each friction contact portion, so that lubrication performance can be improved.

The oil-impregnated member 35 may be formed entirely of a member 35 'impregnated with a lubricating oil as shown in FIG. 9A, but as shown in FIG. 1 roller 1
3 is formed by a member 35 'impregnated with lubricating oil, and the other portions are formed by a metal member 35 ".
The strength of the entire oil-containing member 35 can be increased.

Further, it is possible to prevent the oil-containing member from strongly interfering with the second roller 14 and being drawn into the wedge formed by the outer ring 12 and the second roller 14 during the operation of the friction type multi-stage roller transmission. 10 to 15 show an embodiment in which this is done.

That is, in the embodiment shown in FIG. 10, a cylindrical oil-impregnated member 36 that is in contact with at least one of the outer peripheral surface of the second roller 14 and the inner peripheral surface of the outer ring 12 is frictionally contacted with the outer ring 12. The oil-impregnated member support plate 37 is provided in a space between the second rollers 14 that are in contact with each other.
And is rotatably supported by an oil-impregnated member support shaft 38 which is implanted or integrally formed. As shown in FIG. 11, a hollow cylindrical hole 36a is formed in the oil-impregnated member 36, and the hollow cylindrical hole 36a is fitted into an oil-impregnated member support shaft 38 that is implanted in or integrally formed with the oil-impregnated member support plate 37. This allows the oil-impregnated member support plate 37 to rotatably support the plate. The oil-impregnated member support plate 37 has notches 3 in its inner peripheral portion corresponding to the number of the second roller support shafts 19.
7a are formed at equal intervals in the circumferential direction.
Is engaged with the second roller support shaft 19, the relative position of the oil-impregnated member support plate 37 with respect to the second roller support shaft 19, that is, the relative position of the oil-impregnated member 36 with respect to the second roller 14, can be maintained. Here, the second roller support shaft 1
30 is implanted in the housing 18 when the rotation (revolution) of the second roller 14 around the sun roller 11 is restricted as shown in FIG. 30, and the rotation of the outer ring 12 is reduced as shown in FIG. When restrained, it is implanted on the low speed shaft 22.

As shown in FIG. 10, a cylindrical oil-impregnated member 36 contacting at least one of the outer peripheral surface of the second roller 14 and the inner peripheral surface of the outer ring 12 is brought into contact with the outer ring 12 by friction. It is provided in the space between the two rollers 14 and is rotatably supported on an oil-impregnated member support shaft 38 which is implanted or integrally formed on the oil-impregnated member support plate 37, so that the friction-type multi-stage roller transmission can be operated. The lubricating oil contained in the oil impregnating member 36 is
And / or the rolling surface of the second roller 14 is stably supplied to improve the lubricating performance. Further, it is possible to prevent a problem caused by the oil-containing member 36 strongly interfering with the second roller 14, Ring 12 and second roller 14
The oil-impregnated member 36 can be prevented from being deformed or damaged by being drawn into the wedge formed by the above.

The embodiment shown in FIG. 12 is different from the oil-impregnated member 36 shown in FIG. 10 in that the concave portion or the inner peripheral surface of the outer ring 12 is brought into surface contact with the outer peripheral surface of the second roller 14. A fan-shaped oil-containing member 39 having at least one of the convex portions is provided in a space between the second rollers 14 that comes into frictional contact with the outer ring 12. The support mechanism for the oil-containing member 39 is the same as that shown in FIG.

As an alternative to the method of supporting the oil-impregnated member shown in FIGS. 10 to 12, an oil-impregnated member support shaft is implanted on the member on which the second roller support shaft 19 is implanted, and the second roller By supporting the oil-impregnated member provided between the outer ring 12 and the outer ring 12, it is possible to prevent the oil-impregnated member from strongly interfering with the second roller 14 due to the operation of the friction type multi-stage roller transmission. The wedge formed by the two rollers 14 can be prevented from being drawn inside. The embodiment is shown in FIG. 13 and FIG.

That is, the embodiment shown in FIG. 13 is a friction type multi-stage roller transmission in which the rotation (revolution) of the first roller 13 and the second roller 14 around the sun roller 11 is restrained. An oil-impregnated member support shaft 40 is implanted in the housing 18 in which the oil-impregnated member 19 is implanted, and the oil-impregnated member support shaft 40 comes into contact with at least one of the outer peripheral surface of the second roller 14 and the inner peripheral surface of the outer ring 12. The cylindrical oil-containing member 41 is rotatably supported. Here, the oil-impregnated member 41 has a hollow cylindrical hole, and the hollow cylindrical hole is inserted into the oil-impregnated member support shaft 40 to be rotatably supported by the oil-impregnated member support shaft 40.

The embodiment shown in FIG. 14 is a friction type multi-stage roller transmission in which the rotation of the outer ring 12 is restrained.
2, an oil-impregnated member support shaft 42 is implanted, and the outer peripheral surface of the second roller 14 or the outer ring 1 is
A rotatable oil-impregnated member 43 which is in contact with at least one of the inner peripheral surfaces of the cylindrical oil-injecting member 2 is supported. Here, the oil-impregnated member 43 has a hollow cylindrical hole, and the hollow cylindrical hole is inserted into the oil-impregnated member support shaft 42 to be rotatably supported by the oil-impregnated member support shaft 42.

FIGS. 15 to 21 show an embodiment in which a lubricant holding member is provided in a space between the second rollers 14 that are in frictional contact with the outer ring 12. FIG.

That is, in the embodiment shown in FIG. 15, the lubricant holding member 45 supported by the support plate 44 is provided in the space between the second roller 14 that comes into frictional contact with the outer ring 12. A concave surface 45 a having a radius of curvature slightly larger than the radius of curvature of the outer peripheral surface of the second roller 14 is formed on the surface facing the second roller 14. As shown in FIG. 16, a hollow cylindrical hole 45 b is formed in the lubricant holding member 45, and the hollow cylindrical hole 45 b is implanted in the support plate 44 or formed integrally with the support shaft 4.
6 can be rotatably supported by the support plate 44. The support plate 44 includes
Notches 44a of the same number as the second roller support shafts 19 are formed in the inner peripheral portion at equal intervals in the circumferential direction.
a is engaged with the second roller support shaft 19, the relative position of the support plate 44 with respect to the second roller support shaft 19,
That is, the relative position of the lubricant holding member 45 with respect to the second roller 14 can be maintained. Here, the second roller support shaft 1
Numeral 9 is implanted in the housing 18 when the rotation (revolution) of the second roller 14 around the sun roller 11 is restricted as shown in FIG. 30, and the rotation of the outer ring 12 is restricted as shown in FIG. If so, it is implanted on the low speed shaft 22.

As shown in FIG. 15, the outer ring 12
A lubricant holding member 45 supported by a support plate 44 is provided in a space between the second rollers 14 in frictional contact with the outer peripheral surface of the second roller 14 on a surface of the lubricant holding member 45 facing the second roller 14. By forming the concave surface 45a having a radius of curvature slightly larger than the radius of curvature of the lubricant holding member 45, as shown in FIG. A gap is formed between the rollers 14 so that the lubricant C stays. The lubricant C is stably held in the gap, and the lubricant C stabilizes on the rolling surface of the second roller 14. Supplied to improve lubrication performance.

In the embodiment shown in FIG. 18, instead of the lubricant holding member 45 shown in FIG. 15, a lubricant holding member 47 is provided in a space between the second rollers 14 which makes frictional contact with the outer ring 12. In the lubricant holding member 47, a concave surface 47a having a radius of curvature slightly larger than the radius of curvature of the outer peripheral surface of the second roller 14 is formed on the surface facing the second roller 14, and is continuous with the concave surface 47a in the axial direction. The lubricant reservoir groove 47b is formed. This lubricant holding member 47
Are the same as those shown in FIG. As a result, the lubricant C is more retained in the lubricant reservoir groove 47b, and the lubricant C
And lubrication performance can be further improved.

In the embodiment shown in FIG. 19, a lubricant holding member 48 having two kinds of concave surfaces for the purpose of holding the lubricant is provided.
It is provided in a space between the second rollers 14 that comes into frictional contact with the outer ring 12. The lubricant holding member 48 has a concave surface 48 a having a radius of curvature slightly larger than the radius of curvature of the outer peripheral surface of the second roller 14 on the surface facing the second roller 14, and the surface facing the first roller 13. First roller 1
3, a concave surface 48b having a radius of curvature slightly larger than the radius of curvature of the outer peripheral surface on the large diameter side is formed. The support mechanism of the lubricant holding member 48 is the same as that shown in FIG. Thereby, the first roller 13 and the second roller 1
The lubricant C is stably supplied to the rolling surface of No. 4 to further improve the lubrication performance.

In addition to the method of supporting the lubricant holding member shown in FIGS. 15 to 19, the support shaft of the lubricant holding member is planted on the member on which the second roller support shaft 19 is planted, and the support shaft is mounted on the support shaft. A lubricant holding member provided between the second rollers 14 may be supported. FIG. 20 and FIG.
It is shown in FIG.

In other words, the embodiment shown in FIG. 20 is a friction type multi-stage roller transmission in which the rotation (revolution) of the first roller 13 and the second roller 14 around the sun roller 11 is restricted. A support shaft 49 is implanted in the housing 18 having the implanted 19, and a surface of the support shaft 49 facing the second roller 14 has a radius of curvature slightly larger than the radius of curvature of the outer peripheral surface of the second roller 14. The lubricant holding member 50 having the concave surface is rotatably supported. Here, the lubricant holding member 50 has a hollow cylindrical hole,
The hollow cylindrical hole is rotatably supported by the support shaft 49 by being inserted into the support shaft 49.

The embodiment shown in FIG. 21 is a friction type multi-stage roller transmission in which the rotation of the outer ring 12 is restricted, and the low speed shaft 2 in which the second roller support shaft 19 is implanted.
A lubricant having a support shaft 51 implanted in the support shaft 2 and a concave surface having a radius of curvature slightly larger than the radius of curvature of the outer peripheral surface of the second roller 14 formed on the surface facing the second roller 14 on the support shaft 51 The holding member 52 is rotatably supported. Here, the lubricant holding member 52 has a hollow cylindrical hole, and the hollow cylindrical hole is inserted into the support shaft 51 so as to be rotatably supported by the support shaft 51.

FIGS. 22 to 25 show an embodiment in which the oil-impregnated member is supported on the roller support shaft implanted on the housing 18 or the low-speed shaft 22. FIG.

That is, the embodiment shown in FIG. 22 is a friction type multi-stage roller transmission in which the rotation (revolution) of the first roller 13 and the second roller 14 around the sun roller 11 is restrained. A cylindrical oil-impregnated member 5 having an outer diameter that is in contact with the large-diameter-side outer peripheral surface of one roller 13
3 are provided on both left and right sides of the second roller 14 in the axial direction, and
The second roller support shaft 19 implanted in the housing 18 is rotatably supported. Here, the oil-impregnated member 53 has a hollow cylindrical hole, and this hollow cylindrical hole is connected to the second roller support shaft 19.
The second roller supporting shaft 19 is rotatably supported by being fitted into the second roller supporting shaft 19.

As shown in FIG. 22, a cylindrical oil-impregnated member 53 having an outer diameter such that its outer peripheral surface is in contact with the outer peripheral surface on the large-diameter side of the first roller 13 is placed on both left and right sides of the second roller 14 in the axial direction. The lubricating oil contained in the oil-impregnated member 53 accompanying the operation of the friction type multi-stage roller transmission is provided and rotatably supported by the second roller support shaft 19 implanted in the housing 18. The lubricating performance is improved by being stably supplied to the rolling surface of the roller, and the oil-impregnated member 53 is prevented from having a strong interference with the second roller 14 or the like, or formed by the outer ring 12 and the second roller 14. It is possible to prevent the oil-containing member 53 from being deformed or damaged due to being drawn into the inside of the wedge.

The embodiment shown in FIG. 23 is a friction type multi-stage roller transmission in which the rotation of the outer ring 12 is restricted, and the outer diameter of which is in contact with the outer peripheral surface on the large diameter side of the first roller 13 on the outer peripheral surface. Cylindrical oil-impregnated member 5 having
4 are provided on both left and right sides of the second roller 14 in the axial direction, and
The second roller support shaft 19 implanted on the low-speed shaft 22 is rotatably supported. Here, the oil-impregnated member 54 has a hollow cylindrical hole, and the hollow cylindrical hole is rotatably supported by the second roller support shaft 19 by being inserted into the second roller support shaft 19.

The embodiment shown in FIG.
Three types of rollers 13, 1 between the outer ring 12 and
In the friction-type multi-stage roller transmission provided with the rollers 4 and 15, the cylindrical oil-impregnated member 55 having an outer diameter such that the outer peripheral surface thereof is in contact with the large-diameter outer peripheral surface of the second roller 14 is provided.
It is provided on both left and right sides in the axial direction of the third roller 15, and is rotatably supported by a third roller support shaft 56 implanted in the housing 17 or the low speed shaft 22. Here, the oil-impregnated member 5
5 has a hollow cylindrical hole, and the hollow cylindrical hole is inserted into the third roller support shaft 56 so as to be rotatably supported by the third roller support shaft 56.

In the embodiment shown in FIG. 25, instead of the oil-impregnated members 53 or 54 shown in FIG. 22 or 23, the surface in contact with the first roller 13 is in contact with the large-diameter outer peripheral surface of the first roller 13. The oil-impregnated members 57 formed in a concave shape so as to be in contact with each other are provided on both left and right sides in the axial direction of the second roller 14, and the second impeller 57
It is rotatably supported on a roller support shaft 19. Here, the oil-impregnated member 57 has a hollow cylindrical hole, and the hollow cylindrical hole is rotatably supported by the second roller support shaft 19 by being inserted into the second roller support shaft 19. Thereby, the lubricating oil contained in the oil-impregnated member 57 is easily supplied to the rolling surface of the first roller 13, so that the lubricating performance can be further improved.

FIG. 26 shows an embodiment in which the lubricant holding member is supported by the second roller support shaft 19 implanted on the housing 18 or the low speed shaft 22.

That is, the embodiment shown in FIG.
The lubricant holding member 58 whose surface facing the roller 13 is formed in a concave shape having a curvature radius slightly larger than the radius of curvature of the large-diameter outer peripheral surface of the first roller 13 is moved in the axial direction of the second roller 14. It is provided on both left and right sides, and is rotatably supported by a second roller support shaft 19 implanted in the housing 18 or the low speed shaft 22. Here, the lubricant holding member 58
Has a hollow cylindrical hole, which is rotatably supported by the second roller support shaft 19 by fitting the hollow cylindrical hole into the second roller support shaft 19.

As shown in FIG. 26, the first roller 13
A lubricant holding member 58 whose concave surface has a radius of curvature slightly larger than the radius of curvature of the large-diameter outer peripheral surface of the first roller 13 is attached to the left and right sides of the second roller 14 in the axial direction. , And rotatably supported by the second roller support shaft 19 implanted in the housing 18 or the low-speed shaft 22, so that the outer peripheral surface on the large-diameter side of the first roller 13 and the lubricant holding member 58 are provided. The lubricant is held in the formed gap, and the lubricant is stably supplied to the rolling surface of the first roller 13, so that the lubrication performance can be improved.

Although the above embodiment is a preferred embodiment for carrying out the present invention, the present invention is not limited to this embodiment, and the type and type of roller provided between the sun roller and the outer ring are described. The number can be applied irrespective of whether or not the rollers are restricted from rotating (revolving) around the sun roller.

[0062]

According to the present invention, the rolling surface of the sun roller,
By providing an oil-impregnated member that is in contact with at least one of the rolling surfaces of the outer ring and the rolling surface of the roller disposed between the sun roller and the outer ring,
The lubricant contained in the oil-impregnated member is stably supplied to the rolling surface, and an oil film is stably formed at each friction contact portion to prevent damage due to oil film breakage. It is possible to operate stably for a long time.

A lubricant holding member having a concave surface formed on at least one of a surface facing the roller and a surface facing the roller in frictional contact with the roller, in a space between the rollers in frictional contact with the outer ring. Is provided, the lubricant is stably held between the roller and the concave surface formed on the surface of the lubricant holding member facing the roller, and the oil film is stabilized at each friction contact portion. Thus, the friction type multi-stage roller transmission can be stably operated for a long period of time.

Further, by supporting the oil-impregnated member and the lubricant holding member on a roller support shaft, a housing, or a low-speed shaft, the oil-impregnated member and the lubricant holding member are driven by a roller or the like with the operation of the present friction type multi-stage roller transmission. This can prevent problems caused by strong interference with the outer ring and deformation or breakage caused by being drawn into a wedge formed by the outer ring and the roller.

[Brief description of the drawings]

FIG. 1 is a front view of a main part of a friction type multi-stage roller transmission according to a first embodiment of the present invention.

FIG. 2 is a front view of a main part of a friction type multi-stage roller transmission according to a second embodiment of the present invention.

3A and 3B show a friction type multi-stage roller transmission according to a third embodiment of the present invention, wherein FIG. 3A is a front view of a main part thereof, and FIG. 3B is a perspective view of an oil-containing member.

FIG. 4 is a front view of a main part of a friction-type multi-stage roller transmission according to a fourth embodiment of the present invention.

FIG. 5 is a front view of a main part of a friction type multi-stage roller transmission according to a fifth embodiment of the present invention.

6A and 6B show a friction type multi-stage roller transmission according to a sixth embodiment of the present invention, wherein FIG. 6A is a front view of a main part thereof, and FIG. 6B is a perspective view of an oil-containing member.

7A and 7B show a friction-type multi-stage roller transmission according to a seventh embodiment of the present invention, wherein FIG. 7A is a front view of a main part thereof, and FIG. 7B is a perspective view of an oil-containing member.

8A and 8B show a friction type multi-stage roller transmission according to an eighth embodiment of the present invention, wherein FIG. 8A is a front view of a main part thereof, and FIG. 8B is a cross-sectional view taken along line AA of FIG. is there.

9 shows an oil-impregnated member of the eighth embodiment shown in FIG. 8, (a) is a perspective view of an oil-impregnated member formed entirely of a member impregnated with lubricating oil, and (b) is only a portion in contact with a roller. FIG. 4 is a perspective view of an oil-impregnated member formed of a member impregnated with lubricating oil, and otherwise formed of a metal member.

10A and 10B show a friction type multi-stage roller transmission according to a ninth embodiment of the present invention, wherein FIG. 10A is a front view of a main part thereof, and FIG. 10B is a cross-sectional view taken along line AA of FIG. is there.

11A and 11B are diagrams showing a support mechanism for an oil-impregnated member according to the ninth embodiment shown in FIG. 10, wherein FIG. 11A is a front view and FIG. 11B is an exploded perspective view.

FIG. 12 is a front view of a main part of a friction type multi-stage roller transmission according to a tenth embodiment of the present invention.

13A and 13B show a friction type multi-stage roller transmission according to an eleventh embodiment of the present invention, wherein FIG. 13A is a front view of a main part thereof, and FIG.
FIG. 3 is a perspective view of an oil-impregnated member.

14A and 14B show a friction type multi-stage roller transmission according to a twelfth embodiment of the present invention, wherein FIG. 14A is a front view of a main part thereof, and FIG.
FIG. 2 is a cross-sectional view taken along line AA of FIG.

15A and 15B show a friction type multi-stage roller transmission according to a thirteenth embodiment of the present invention, wherein FIG. 15A is a front view of a main part thereof, and FIG.
FIG. 2 is a cross-sectional view taken along line AA of FIG.

16A and 16B are diagrams showing a support mechanism of the lubricant holding member according to the thirteenth embodiment shown in FIG. 15, wherein FIG.
(B) is an exploded perspective view.

FIG. 17 is a partially enlarged view of the thirteenth embodiment shown in FIG.

FIGS. 18A and 18B show a friction-type multi-stage roller transmission according to a fourteenth embodiment of the present invention, wherein FIG.
FIG. 4 is a perspective view of a lubricant holding member.

19A and 19B show a friction type multi-stage roller transmission according to a fifteenth embodiment of the present invention, wherein FIG. 19A is a front view of a main part thereof, and FIG.
FIG. 4 is a perspective view of a lubricant holding member.

FIGS. 20A and 20B show a friction type multi-stage roller transmission according to a sixteenth embodiment of the present invention, wherein FIG.
FIG. 2 is a cross-sectional view taken along line AA of FIG.

FIGS. 21A and 21B show a friction type multi-stage roller transmission according to a seventeenth embodiment of the present invention, wherein FIG.
FIG. 2 is a cross-sectional view taken along line AA of FIG.

FIGS. 22A and 22B show a friction type multi-stage roller transmission according to an eighteenth embodiment of the present invention, wherein FIG.
FIG. 2 is a cross-sectional view taken along line AA of FIG.

23A and 23B show a friction type multi-stage roller transmission according to a nineteenth embodiment of the present invention, wherein FIG.
FIG. 2 is a cross-sectional view taken along line AA of FIG.

FIG. 24 is a front view of a main part of a friction-type multi-stage roller transmission according to a twentieth embodiment of the present invention.

FIG. 25 is a front view of a main part of a friction-type multi-stage roller transmission according to a twenty-first embodiment of the present invention.

26A and 26B show a friction type multi-stage roller transmission according to a twenty-second embodiment of the present invention, wherein FIG.
Is a partially enlarged view.

27A and 27B show two basic structures of a planetary roller type power transmission device. FIG. 27A is an exploded perspective view of a type in which a planetary roller and a carrier are in contact on the inner peripheral surface of a hollow planetary roller, and FIG. FIG. 2 is a perspective view of a type assembly and disassembly in which a carrier contacts a planetary roller on an outer peripheral surface of the planetary roller.

28A and 28B show a conventional friction type multi-stage (two-stage) roller transmission, wherein FIG. 28A is a front view of a main part thereof, and FIG.
It is sectional drawing which follows the -A line.

FIG. 29 is a front view of a main part of a conventional friction-type multi-stage (three-stage) roller transmission.

30 shows a structural diagram of the friction-type multi-stage roller transmission shown in FIG. 28 when the rotation (revolution) of the roller around the sun roller is restrained, (a) is a front view of a main part thereof, (b)
FIG. 2 is a cross-sectional view taken along line AA of FIG.

FIG. 31 is a structural diagram of the friction-type multi-stage roller transmission shown in FIG. 28 when the rotation of the outer ring is restricted,
(A) is a front view of the main part, (b) is AA of (a).
It is sectional drawing which follows a line.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Sun roller 12 Outer ring 13 1st roller 14 2nd roller 15 3rd roller 16 High speed shaft 18 Housing 19 2nd roller support shaft 21 Housing 22 Low speed shaft 28-36 Oil impregnated member 37 Oil impregnated member support plate 38 Oil impregnated member support axis 39 Oil impregnated Member 40 Oil-impregnated member support shaft 41 Oil-impregnated member 42 Oil-impregnated member support shaft 43 Oil-impregnated member 44 Support plate 45 Lubricant holding member 46 Support shaft 47 Lubricant holding member 48 Lubricant holding member 49 Support shaft 50 Lubricant holding member 51 Support shaft 52 Lubricant holding members 53 to 55 Oil impregnating member 56 Third roller support shaft 57 Oil impregnating member 58 Lubricant holding member

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3J051 AA01 BA04 BB08 BC03 BD02 BE03 ED08 3J063 AB35 AC01 BA20 CA01 CB36 XD03 XD72 XF14

Claims (14)

[Claims] 1. A space formed between a sun roller and an outer ring arranged so that their axes coincide with each other.
More than one type of rollers (first to n in order of proximity to the sun roller) are arranged at equal intervals in the circumferential direction in a pressed state, and at least the first roller is formed of a plurality of cylinders. In a friction type multi-stage roller transmission having an outer peripheral surface that is a rolling surface having two different turning radii, an outer peripheral surface that is a rolling surface of a sun roller, an inner peripheral surface that is a rolling surface of an outer ring, and a sun roller A friction-type multi-stage roller transmission, comprising: an oil-impregnated member that is in contact with at least one of the outer peripheral surfaces that are the rolling surfaces of rollers disposed between outer rings. 2. An oil-impregnated member having an inner peripheral surface in contact with an outer peripheral surface of a sun roller or an outer peripheral surface of which is in contact with one small-diameter outer peripheral surface which is one of the rolling surfaces of a first roller. 2. The friction type multi-stage roller transmission according to claim 1, wherein the transmission is provided in a space between the transmissions. 3. An oil-impregnated member having an inner peripheral surface in contact with the outer peripheral surface of the sun roller or an outer peripheral surface in contact with the outer peripheral surface of the second roller is provided in a space between the sun roller and the first and second rollers. The friction type multi-stage roller transmission according to claim 1, wherein 4. An inner peripheral surface of an outer ring, an outer peripheral surface of an n-th roller in frictional contact with the inner peripheral surface of an outer ring, and an outer peripheral surface of an (n-1) th roller in frictional contact with the n-th roller.
The friction-type multi-stage roller transmission according to claim 1, wherein an oil-impregnated member in contact with at least one rolling surface is provided in a space formed between the n-th roller and the outer ring. 5. An oil-impregnated member having an inner peripheral surface that is in contact with a large-diameter outer peripheral surface that is the other rolling surface of each of the first rollers, and is provided coaxially with the sun roller. 2. The friction-type multi-stage roller transmission according to 1. 6. A space formed between a sun roller and an outer ring arranged so that their axes coincide with each other.
At least one type of rollers are arranged at equal intervals in the circumferential direction in a pressed state, and among these rollers, at least one type of roller is composed of a plurality of cylinders, so that a rolling surface having two different turning radii is provided. In the friction type multi-stage roller transmission having an outer peripheral surface, an oil-impregnated member that contacts at least one of the inner peripheral surface that is the rolling surface of the outer ring and the outer peripheral surface that is the rolling surface of the roller that frictionally contacts the outer ring. At least one
A friction-type multi-stage roller transmission characterized in that the oil-impregnated member is provided in a space between rollers that come into frictional contact with the outer ring and is supported so as to maintain a relative position with respect to the rollers that come into frictional contact with the outer ring. 7. A support plate is provided on a housing or a roller support shaft implanted on a low-speed shaft so as to restrict the movement in the rotation direction, and an oil-impregnated member support shaft implanted on or integrally formed with the support plate. 7. The friction-type multi-stage roller transmission according to claim 6, wherein the oil-impregnated member is supported. 8. A friction-type multi-stage roller transmission according to claim 6, wherein said oil-impregnated member is supported on an oil-impregnated member support shaft implanted or integrally formed on a housing or a low-speed shaft. 9. A space formed between a sun roller and an outer ring arranged so that their axes coincide with each other.
At least one type of rollers are arranged at equal intervals in the circumferential direction in a pressed state, and among these rollers, at least one type of roller is composed of a plurality of cylinders, so that a rolling surface having two different turning radii is provided. In a friction type multi-stage roller transmission in which a roller that comes into frictional contact with the outer ring is rotatably supported by a roller or a roller support shaft implanted on a low-speed shaft, the outer ring has a roller that comes into frictional contact with the outer ring. At least one lubricant holding member having a concave surface formed on at least one of a surface facing the outer peripheral surface, which is a rolling surface, and a surface facing the outer peripheral surface, which is a rolling surface of a roller in frictional contact with the roller. , Provided in the space between the rollers that are in frictional contact with the outer ring, and the lubricant holding member is positioned relative to the rollers that are in frictional contact with the outer ring. A friction type multi-stage roller transmission characterized by being supported so as to maintain the friction. 10. A support plate provided on a housing or a roller support shaft implanted on a low-speed shaft so as to restrict movement in the rotation direction, and a lubricant holding member implanted or integrally formed on the support plate. The friction-type multi-stage roller transmission according to claim 9, wherein the lubricant holding member is supported on a shaft. 11. A friction type multi-stage roller transmission according to claim 9, wherein said lubricant holding member is supported on a lubricant holding member supporting shaft which is implanted or integrally formed on a housing or a low speed shaft. . 12. A friction type multi-stage according to claim 9, wherein at least one lubricant reservoir groove penetrating in the axial direction is provided on a concave surface formed in said lubricant holding member. Roller transmission. 13. A space formed between a sun roller and an outer ring arranged so that their axes coincide with each other,
Two or more types of rollers are arranged at equal intervals in the circumferential direction in a pressed state, and of those rollers, the roller that comes into frictional contact with the outer ring is rotatable by a roller support shaft implanted in the housing or a low-speed shaft. In a friction type multi-stage roller transmission having an outer peripheral surface that is a rolling surface having two different rotation radii by being supported and being in frictional contact with the roller in a pressure-contact state, the outer ring and the outer ring At least one oil-impregnated member that is in contact with the outer peripheral surface on the large-diameter side, which is the other rolling surface of the roller that is in frictional contact with the roller that is in frictional contact with the roller that is in frictional contact, is mounted on the housing or roller support shaft that is implanted in the low-speed shaft A friction type multi-stage roller transmission characterized by being supported. 14. A space formed between a sun roller and an outer ring arranged so that their axes coincide with each other,
Two or more types of rollers are arranged at equal intervals in the circumferential direction in a pressed state, and of those rollers, the roller that comes into frictional contact with the outer ring is rotatable by a roller support shaft implanted in the housing or a low-speed shaft. In a friction type multi-stage roller transmission having an outer peripheral surface that is a rolling surface having two different rotation radii by being supported and being in frictional contact with the roller in a pressure-contact state, the outer ring and the outer ring At least one oil-impregnated member having a concave surface on the surface facing the large-diameter-side outer peripheral surface, which is the other rolling surface of the roller in frictional contact with the roller in frictional contact with the frictional contact roller, is provided on the housing or the low-speed shaft. A friction-type multi-stage roller transmission, wherein the transmission is supported by an implanted roller support shaft.