JP5086982B2 - Planetary roller type power transmission device - Google Patents

Description

  The present invention is a planetary roller type in which a plurality of planetary rollers are disposed between the inner peripheral surface of an elastic ring and a peripheral surface of a sun roller arranged concentrically, and a carrier that supports a support shaft of the planetary roller is used as an output shaft The present invention relates to a power transmission device.

When using a gear type as a power transmission device for industrial machines such as printing machines and machine tools, noise and vibration may be a problem, so power transmission with low noise and vibration is possible. In order to achieve this, it is generally known to use a planetary roller power transmission device. In the planetary roller type power transmission device, a high temperature is generated due to transmission friction during high-speed operation, and the lubrication performance at the contact portion between the planetary roller and the elastic ring tends to be insufficient. For this reason, various devices for improving the lubricating performance have been made. (Patent Documents 1, 2, 3 and 4)
The planetary roller type power transmission device is adapted to be used in a large-sized power transmission device because of its low noise and low vibration characteristics as described above. Not only the wear of the contact portion between the roller and the elastic ring, but also when the planetary roller rolls while pressing the inner peripheral surface of the elastic ring, the elastic ring swells to the side, and the side surface of the elastic ring becomes When the groove is rubbed strongly, so-called fretting wear occurs, and the elastic ring may crack and break, and the elastic ring may be damaged. Since such fretting wear occurs at the upper part of the elastic ring where the lubricating oil does not reach, it is desired to improve the lubricating performance at the portion where the upper side surface of the elastic ring is fitted in the groove of the housing.
Japanese Utility Model Publication No. 7-21949 (FIGS. 1 and 3) Japanese Patent No. 3595392 (FIG. 1) Japanese Utility Model Publication No.59-115155 (FIG. 3) Japanese Utility Model Publication No. 1-169652 (Fig. 1)

According to Patent Document 1, the planetary roller is provided with a through hole, and the lubricant is supplied to the inner peripheral surface of the outer ring and the outer peripheral surface of the sun roller that are in contact with the planet roller through the through hole, and further, the inner peripheral surface of the outer ring. It is assumed that the lubricant is stored in the groove provided on the inner surface of the outer ring, and the stored lubricant is repeatedly supplied to the outer peripheral surface of the sun roller through the inner peripheral surface of the outer ring and the through hole of the planetary roller.
According to Patent Document 2, a groove is provided on the inner peripheral surface of the inner roller (outer ring) on which the planetary roller rolls, and the inner roller is provided on the outer peripheral side of the carrier having a shaft on which the planetary roller rotates. A board member fitted with a slight gap is provided on the periphery, and a lubricant reservoir is provided between the carrier and the end of the sun roller to hold the lubricant.
However, in the planetary roller type power transmission devices of Patent Documents 1 and 2, the grease (lubricant) on the inner peripheral surface of the outer ring (inner roller) and the outer peripheral surface of the sun roller that are in contact with the planetary roller is easily retained and lubricated. The outer ring (inner roller) side surface at the upper part of the groove of the housing in which the outer ring (inner roller) is fitted, which is particularly required for large planetary roller type power transmission devices. The lubricity is not considered.

Next, according to Patent Document 3, a disk-like oil scattering member is attached to the input shaft in the gear case (housing), and lubricating oil is scattered and adhered to the inner wall surface of the gear case.
However, in the roller speed reduction device (planet roller type power transmission device) of Patent Document 3, since the disk-like oil scattering member is attached only to the input shaft side, the gear case in which the outer ring (outer ring) is fitted. In this groove portion, the lubricating oil is sufficiently scattered and adhered to the side surface on the input shaft side, but there is a problem that the other side surface is less scattered and adhered, and the lubricity on both sides is insufficient.

Further, according to Patent Document 4, lubricating cooling oil is sprayed on the outer ring (housing).
However, the planetary roller type power transmission device of Patent Document 4 has a problem in that the lubricating cooling oil has to be circulated, so that a pump by power and its piping are required, resulting in high costs.

  It is an object of the present invention to provide a planetary roller power transmission device that can achieve low-cost lubrication that can prevent fretting wear on the side surface of an elastic ring, which is often requested particularly in large planetary roller power transmission devices. Yes.

The present invention solves the above problems by the following means.
(1) A planetary roller type power transmission device as a first means includes a sun roller, an elastic ring fitted in a groove in a housing, and an outer peripheral surface of the sun roller and an inner peripheral surface of the elastic ring. A planetary roller type power transmission device in which a plurality of planetary rollers are arranged so as to roll freely at an equal angle, and the planetary rollers are rotatably supported on a shaft fixed to a carrier. A pipe having an opening on the side of the carrier and for feeding lubricating oil from the lubricating oil immersion part to a side surface of the upper part of the elastic ring fitted into the groove in the housing is provided, and the center of the carrier It is characterized by being decentered from the center .
(2) planetary roller power transmission device of the second means, said in planetary roller type power transmission device of the first means, the lubricating by a so-called Misosuri rotation of the carrier constructed by the eccentric (precession) The lubricating oil in the oil immersion portion is fed into the pipe.
(3) The planetary roller type power transmission device of the third means is the planetary roller type power transmission device of any one of the first or second means, wherein a pump is provided inside or outside the housing, It is configured to be incorporated in the pipe and to feed the lubricating oil from the lubricating oil immersion part into the pipe by the action of the pump.
(4) The planetary roller type power transmission device of the fourth means is the planetary roller type power transmission device of the third means, wherein the lubricating oil immersion portion is provided in the middle of the piping for feeding the lubricating oil from the lubricating oil immersion portion. A pump having a piston provided in the hole, a rod of the piston, a roller rotating around a pin provided at the other end of the rod, As a pump constituted by a spring that acts to press a roller against the outer peripheral surface of the carrier, the pump is operated by the rotation of the carrier.
(5) The planetary roller type power transmission device of the fifth means is the planetary roller type power transmission device of any one of the first to fourth means, wherein the lubricating oil is fed from the lubricating oil immersion portion in the piping. In addition, a core yarn is incorporated which sucks lubricating oil and feeds it to the side surface of the upper portion of the elastic ring fitted into the groove in the housing by capillary action.
(6) The planetary roller type power transmission device of the sixth means is the planetary roller type power transmission device of any one of the first to fifth means, wherein one or more lubricating oils are scraped to the outer peripheral portion of the carrier. It is characterized by providing a hole.
(7) The planetary roller type power transmission device of the seventh means is the planetary roller type power transmission device of any one of the first to sixth means, wherein piping for feeding the lubricating oil from the lubricating oil immersion portion is provided. Furthermore, it is extended to the bearing of the said input shaft or the bearing of the said output shaft.

(8) The planetary roller type power transmission device of the eighth means includes a sun roller, an elastic ring fitted in a groove in the housing, and an outer peripheral surface of the sun roller and an inner peripheral surface of the elastic ring. A planetary roller type power transmission device in which a plurality of planetary rollers are arranged so as to be freely rotatable at an equal angle, and the planetary rollers are rotatably supported on a shaft fixed to the carrier. Provided with blades that sweep up the lubricant from the lubricant immersion part, the lubricant oil scattered and adhered by the blades penetrates from the upper part of the inner wall of the housing to the side of the upper part of the fitting part of the elastic ring in the groove in the housing. The side surface is lubricated and the center of the carrier is decentered from the center of the sun roller .
(9) The planetary roller power transmission device of the ninth means is the planetary roller power transmission device of the eighth means, together with the sun roller in a direction opposite to the carrier side of the elastic ring. A rotating disk is disposed, and a blade for scraping the lubricating oil from the lubricating oil immersion part is provided on the outer periphery of the disk, and the lubricating oil scattered and adhered by the blade is transferred from the upper part of the inner wall of the housing to the elastic ring. Is inserted into the upper side of the fitting portion in the groove in the housing to lubricate the side surface.
(10) The planetary roller type power transmission device of the tenth means is the planetary roller type power transmission device of the eighth or ninth means, wherein the lubricating oil that retains the lubricant oil scattered and adhered to the outer peripheral side end portion of the blade is used. An oil holder is provided.
(11) The planetary roller power transmission device of the eleventh means is the planetary roller power transmission device of the tenth means, wherein the lubricating oil holder is brought into contact with at least the upper part of the inner wall of the housing, Lubricating oil permeates from the upper part of the inner wall of the housing to the side surface of the upper part of the elastic ring fitted into the groove in the housing by the contact, thereby lubricating the side surface.
(12) The planetary roller type power transmission device of the twelfth means is the planetary roller type power transmission device of any one of the eighth to eleventh means, wherein the housing is located above the carrier or disc having the blades. A hole is provided from the inner wall to the side surface of the upper portion of the elastic ring fitted into the groove in the housing, and the lubricating oil scattered and adhered by the rotation of the blade or the lubricating oil holder through the hole is guided to the side surface. It is characterized by being made to be.

The present invention according to claim 1 includes a sun roller directly connected to the input shaft, an elastic ring fitted in a groove in the housing, and a plurality of spaces between the outer peripheral surface of the sun roller and the inner peripheral surface of the elastic ring. A planetary roller type power transmission device in which the planetary roller is rotatably arranged at an equal angle, the planetary roller is rotatably supported on a shaft fixed to a carrier, and an output shaft is integrally provided on the carrier. An opening is provided on the side of the carrier of the lubricating oil immersion portion in the housing, and a pipe for feeding the lubricating oil from the lubricating oil immersion portion to the side surface of the upper portion of the elastic ring fitted into the groove in the housing is provided. As a result, the side surface of the upper portion of the fitting portion of the elastic ring into the groove in the housing is lubricated, and fretting wear on the side surface of the elastic ring can be prevented. With the results.
Further, the present invention according to claims 1 and 2 is configured such that the center of the carrier is decentered from the center of the sun roller, and so-called miso rotation (precession) of the carrier causes the lubricating oil in the lubricating oil immersion portion. As a result, the lubricating oil can be efficiently supplied to the side surface.

According to a third aspect of the present invention, in the planetary roller power transmission device according to the first or second aspect , a pump is provided inside or outside the housing, the pump is incorporated in the pipe, and the lubricating oil immersion portion is used. By configuring the piping to feed the lubricating oil by the action of the pump, the lubricating oil can be reliably supplied to the side surface of the elastic ring fitted into the groove in the housing. It has the effect.
According to a fourth aspect of the present invention, there is provided a planetary roller power transmission device according to the third aspect , wherein a hole having an opening in the lubricating oil immersion portion is provided in the middle of a pipe for feeding the lubricating oil from the lubricating oil immersion portion. The pump, the piston provided in the hole, the rod of the piston, the roller rotating around the pin provided at the other end of the rod, and the outer peripheral surface of the carrier As a pump composed of a spring acting to press against the pump, the pump is operated by the rotation of the carrier, so that it is possible to make a pump that does not require the use of other power, and is simple and inexpensive. It has the effect that it can be set as a simple apparatus.
According to a fifth aspect of the present invention, in the planetary roller power transmission device according to any one of the first to fourth aspects, the lubricating oil is sucked into a pipe that feeds the lubricating oil from the lubricating oil immersion portion. Lubricating oil can be easily applied to the side of the upper part of the elastic ring fitted into the groove in the housing by incorporating a core thread that is fed into the side of the upper part of the elastic ring fitted into the groove in the housing by capillary action. It has the effect that the supply of has come to be performed.
According to a sixth aspect of the present invention, in the planetary roller power transmission device according to any one of the first to fifth aspects, at least one lubricating oil scraping hole is provided in the outer peripheral portion of the carrier. There is an effect that the feeding of the lubricating oil from the lubricating oil immersion portion to the pipe becomes efficient.
According to a seventh aspect of the present invention, in the planetary roller power transmission device according to any one of the first to sixth aspects, a pipe that feeds the lubricating oil from the lubricating oil immersion portion is further connected to a bearing of the input shaft or By extending to the bearings of the output shaft, it is not necessary to immerse these bearings with the lubricating oil in the lubricating oil immersion portion, so the oil level of the lubricating oil can be lowered to the minimum necessary, Stirring loss can be reduced during rotation in the lubricating oil.

The present invention according to claims 8 and 9 includes a sun roller directly connected to the input shaft, an elastic ring fitted in a groove in the housing, and an outer peripheral surface of the sun roller and an inner peripheral surface of the elastic ring. A planetary roller type power transmission device in which a plurality of planetary rollers are rotatably arranged at an equal angle, the planetary rollers are rotatably supported on a shaft fixed to a carrier, and an output shaft is integrally provided on the carrier. In the outer peripheral portion of the carrier or the outer peripheral portion of the disk disposed in the direction opposite to the carrier side of the elastic ring, a blade for scraping the lubricating oil from the lubricating oil immersion portion in the housing is provided, Lubricating oil scattered and adhered by the blades is permeated from the upper part of the inner wall of the housing into the side surface of the upper part of the elastic ring fitted into the groove in the housing, thereby lubricating the side surface. More, an effect that began to lubrication of the side surface is effectively performed.
According to a tenth aspect of the present invention, in the planetary roller power transmission device according to the eighth or ninth aspect , a lubricating oil holder is provided to hold the lubricating oil scattered and adhered to the outer peripheral side end of the blade. In addition, there is an effect that the side surface of the elastic ring can be efficiently lubricated without interruption.
The present invention according to claim 11 is the planetary roller power transmission device according to claim 10 , wherein the lubricating oil holder is brought into contact with at least the upper part of the inner wall of the housing so that the lubricating oil can be applied. As a result, the lubricating oil can permeate from the upper part of the inner wall of the housing into the side surface of the upper part of the fitting portion of the elastic ring in the groove in the housing, and the side surface of the elastic ring can be efficiently lubricated without interruption. Has the effect of
According to a twelfth aspect of the present invention, in the planetary roller type power transmission device according to any one of the eighth to eleventh aspects, the elastic ring is formed above the carrier or disk having the blades and from the inner wall of the housing. By providing a hole that communicates with the side surface of the upper portion of the fitting portion into the groove in the housing, the lubricating oil scattered and adhered by the rotation of the blade or the lubricating oil holder through the hole is guided to the side surface, This has the effect that the side surface can be more reliably lubricated.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to the embodiments. In addition, constituent elements in the following embodiments include those that can be easily assumed by those skilled in the art or those that are substantially the same.

(First embodiment)
A first embodiment of the present invention will be described with reference to FIGS.
FIG. 1 is a front view of a planetary roller power transmission device according to the present invention, and is a partial cross-sectional view.
FIG. 2 is a cross-sectional view taken along the line AA of FIG.
FIG. 3 is a view corresponding to FIG. 1 and shows a case where a core yarn is inserted into the pipe 25.

  In the figure, a planetary roller type power transmission device 1 includes a sun roller 12, a plurality (three in the figure) of planetary rollers 15 arranged at an equal angle adjacent to the outer peripheral surface of the sun roller 12, and the sun. An elastic ring 16 having the same axis as the roller 12 and adjacent to the plurality of planetary rollers 15 and enclosing each of the planetary rollers 15 while pressing them is provided.

The input shaft 12 a configured integrally with the sun roller 12 is pivotally supported by a bearing 13 in the housing 11, and the elastic ring 16 has an outer peripheral surface 16 b and a side surface 16 a fitted in the groove 11 a of the housing 11. The planetary roller 15 has an inner peripheral surface that slides on an outer peripheral surface of a shaft 17 formed integrally with the carrier 18 and is rotatable.
In the drawing, the elastic ring 16 has a U-shaped cross section. However, the elastic ring 16 may have a solid shape that is not U-shaped in cross section.
The output shaft 21 formed integrally with the carrier 18 is supported by a bearing 22 in the housing 11, and the carrier 18 is supported by a bearing 19 on a shaft 12 b formed integrally with the sun roller 12. The center 18c is eccentric from the center 12c of the sun roller 12 by the amount of eccentricity e.
Also, in the figure, a lube oil scraping hole 18h is formed on the outer periphery of the carrier 18 equally in the circumference, and a ring 18f is integrated with the carrier 18 on the outer peripheral portion of the side surface of the carrier 18 on the output shaft side. Although attached, the lubricating oil scraping hole 18h and the ring 18f may be omitted if unnecessary, and a hole similar to the lubricating oil scraping hole 18h may be provided on the outer periphery of the ring 18f.

The friction rolling surface between the outer peripheral surface of the planetary roller 15 and the sun roller 12 and the inner peripheral surface of the elastic ring 16, the rotational sliding surface between the planetary roller 15 and the shaft 17, the bearing 13, the bearing 19, the bearing 22, etc. The lubricating oil is lubricated and cooled by the lubricating oil in the lubricating oil immersion part 20 which is the oil surface 20a of the inner chamber 11b.
A pipe 25 is arranged from the lubricating oil immersion part 20 to the upper side of the housing 11 starting from the opening 25a at the illustrated position on the side of the carrier 18 rotating as indicated by an arrow 18b, and a branch pipe 25b is arranged at the tip of the pipe 25. Thus, the lubricating oil in the lubricating oil immersion part 20 is guided to the outer peripheral surface 16 b and the side surface 16 a above the elastic ring 16.
Here, the planetary roller type power transmission device 1 has been described as being used as a speed reducer having the input shaft as a symbol 12a and the output shaft as a symbol 21, but the symbol 21 is an input shaft and the symbol 12a is an output shaft. Of course, it can be used as a gearbox.

Next, the operation of the planetary roller power transmission device 1 according to this embodiment will be described.
When the sun roller 12 rotates, the outer peripheral surface of the planetary roller 15 rotates and revolves due to friction caused by pressing between the outer peripheral surface of the sun roller 12 and the inner peripheral surface of the elastic ring 16, and the carrier 18 integrated with the shaft 17. Rotates. At this time, since the center 18c of the carrier 18 is eccentric from the center 12c of the sun roller 12 by the amount of eccentricity e, the carrier 18 has a two-dot chain line around the center 12c in the inner chamber 11b of the housing 11 as shown in FIG. It rotates like a so-called miso movement (precession movement) from the state 18a shown to the state 18 shown by a solid line.

The so-called miso rotation (precession) of the carrier 18 causes the lubricating oil in the lubricating oil immersion portion 20 to be forced into the pipe 25 from the opening 25a, and the lubricating oil is repeatedly pushed into the pipe 25 due to repeated pushing of the lubricating oil into the pipe 25. Is guided to the branch pipe 25b, and lubricating oil is supplied to the outer peripheral surface 16b and the side surface 16a above the elastic ring 16 fitted in the groove 11a of the housing 11.
Here, since the carrier 18 is provided with the lubricating oil scraping hole 18h on the outer periphery, and further provided with the ring 18f, the pushing of the lubricating oil into the pipe 25 is strengthened, and the carrier 18 Rotation of miso (precession) is similar to a rotary pump.
By supplying lubricating oil to the side surface 16a, fretting wear on the side surface 16a of the elastic ring 16 due to frequent rolling of the planetary roller 15 can be prevented.
Note that the lubricating oil that has been fed into the outer peripheral surface 16b and the side surface 16a above the elastic ring 16 and protrudes downward is returned to the lubricating oil immersion portion 20 from a hole (not shown) below the housing 11.

  The inner diameter of the pipe 25 may be a size that allows the lubricating oil to be efficiently fed by so-called miso rotation (precession movement) of the carrier 18, but as shown in FIG. The core oil 24 that sucks the lubricant oil like a thread and feeds the lubricant oil by capillary action is inserted, and the lubricant oil in the lubricant immersion part 20 is guided to the side surface 16a of the elastic ring 16 via the branch pipe 25b. Good. In particular, when the planetary roller power transmission device is large, the effect of using the core yarn 24 is increased because the feed height of the lubricating oil is increased.

(Second Embodiment)
Next, a second embodiment of the present invention will be described with reference to FIG.
FIG. 4 is a front view of the planetary roller power transmission device according to the second embodiment, which is a partial cross-sectional view and corresponds to FIG.

In the planetary roller type power transmission device 2 shown in the figure, the same structure as that of the first embodiment is denoted by the same symbol, and redundant description is omitted. The pipe 25 is configured by joining a hole 26 having an opening 26a and a pipe 25d having an opening 25c as illustrated.
A piston 28 is inserted into the hole 26 so as to be reciprocally slidable. A roller 33 is rotatably mounted around a shaft 32 provided at the other end of a rod 29 having one end fixed to the piston 28. The spring 31 biases the rod 29 toward the carrier 18 between the spring receiver 11d fixed to the housing 11 and the spring receiver 29a fixed to the rod 29, and is pressed against the outer peripheral surface of the carrier 18. The piston 28 and the like constitute a pump 30.
Here, the outer periphery and the side surface of the carrier 18 are not provided with a lubricant scraping hole and a ring.
A check valve 34 is provided at a joint portion of the pipe 25 d with the hole 26, and when the lubricating oil in the lubricating oil immersion section 20 is sucked by the pump 30, the valve is opened. It is designed to close when it is pushed out. Further, a check valve 35 is provided on the downstream side of the joining portion of the pipe 25, which is closed when the lubricating oil in the lubricating oil immersion part 20 is sucked by the pump 30, and the sucked lubricating oil is sent to the pipe 25 by the pump 30. When extruding, it opens.

Next, the operation of the second embodiment will be described.
When the pump 28 is operated by the reciprocating stroke of the piston 28 through the movement of the roller 33 due to the so-called taste-spinning rotation (precession) of the carrier 18 around the center 12c, the lubricating oil in the lubricating oil immersion portion 20 is discharged. Via the opening 25c and the pipe 25d, the check valve 34 and the check valve 35 are opened and closed and supplied to the pipe 25 and the branch pipe 25b to lubricate the side face 16a of the elastic ring 16.
The pump 30 can be a pump with a separate power, but in the second embodiment, a pump with a power different from that of the planetary roller power transmission device 2 is not required. can do.

(Third embodiment)
Next, a third embodiment of the present invention will be described with reference to FIG.
FIG. 5 is a side sectional view of the planetary roller power transmission device according to the third embodiment, and corresponds to FIG.

  In the planetary roller power transmission device 3 shown in the figure, the same structure as that of the first embodiment is denoted by the same symbol, and redundant description is omitted. The pipe 25 is connected to the branch pipe 25e above the elastic ring 16, and is further branched from the branch pipe 25e to the side face 16a of the elastic ring 16, the bearing 13 and the bearing 22 by pipes 25f, 25g and 25h, respectively.

Explaining the operation of the third embodiment, the lubricating oil fed into the pipe 25 from the lubricating oil immersion part 20 is guided to the side surface 16a of the elastic ring 16 via the branch pipe 25e, and the height of the planetary roller 15 is increased. Fretting wear of the side surface 16a of the elastic ring 16 due to rolling at a high frequency can be prevented, and the lead is guided to the bearing 13 and the bearing 22 and lubricated.
Thus, since the bearing 13 and the bearing 22 are also supplied with the lubricating oil from the pipe 25, it is not necessary to immerse the bearing 13 and the bearing 22 with the lubricating oil in the lubricating oil immersion portion 20, and therefore the oil level of the lubricating oil. 20a can be lowered to the minimum necessary, and stirring loss of the carrier 18 rotating in the lubricating oil can be reduced.

  Note that the above description is not limited to the case where the lubricating oil is fed into the pipe 25 by so-called miso rotation (precession movement) of the carrier 18, but the lubricating oil to the pipe 25 by the pump 30 shown in the second embodiment. Of course, it is also applied to the case of sending in.

(Fourth embodiment)
Further, a fourth embodiment of the present invention will be described with reference to FIGS.
FIG. 6 is a front view of a planetary roller power transmission device according to a fourth embodiment, which is a partial cross-sectional view and corresponds to FIG.
7 is a cross-sectional view taken along line BB in FIG.

In the planetary roller type power transmission device 4 shown in the figure, the same structure as that of the first embodiment is denoted by the same symbol, and redundant description is omitted. The vanes 40 are mounted at predetermined intervals on the outer peripheral surfaces of the carrier 180 and the disc 45 eccentric to the sun roller 12. In addition, the disk 45 whose outer diameter is substantially the same as that of the carrier 180 and whose outer peripheral portion is substantially the same width is attached to the input shaft 120a by a member 47.
Here, in the figure, but shows carrier 180 concentrically with the sun roller 12, in fact, the carrier 180 that has eccentric with the sun roller 12.

  The operation of the fourth embodiment will be described. When the carrier 180 and the disk 45 rotate in the direction of the arrow 180a, the blades 40 scoop up the lubricating oil in the lubricating oil immersion portion 20 to the inner wall above the inner chamber 11b. Spatter and adhere. Lubricating oil adhering to the location 11c penetrates into the side surface 16a of the elastic ring 16 fitted in the groove 11a in the housing 11, and can prevent fretting wear on the side surface 16a.

(Fifth embodiment)
Further, a fifth embodiment of the present invention will be described with reference to FIGS.
FIG. 8 is a front view of the planetary roller power transmission device of the fifth embodiment, which is a partial cross-sectional view and corresponds to FIG. 6.
9 is a cross-sectional view taken along the line CC of FIG.

In the planetary roller type power transmission device 5 shown in the figure, the same structure as that of the fourth embodiment is denoted by the same symbol, and redundant description is omitted. On the outer peripheral surfaces of the carrier 180 and the disc 45, blades 41 having, for example, sponge-like lubricant holders 42 are mounted at predetermined intervals on the outer peripheral end.
The operation of the planetary roller type power transmission device 5 will be described. The blade 41 equipped with the lubricant holder 42 scrapes the lubricating oil in the lubricating oil immersion portion 20 by the rotation of the carrier 180 and the disk 45 in the direction of the arrow 180a. As in the case of the planetary roller power transmission device 4, the lubricating oil that has been lifted and scattered and adhered to the inner wall above the inner chamber 11 b penetrates the side surface 16 a of the elastic ring 16 and penetrates the side surface 16 a. Fretting wear can be prevented.
Here, since the lubricating oil held by the lubricating oil holder 42 from the lubricating oil immersion part 20 is scattered by the centrifugal force generated by the rotation of the carrier 180 and the disk 45, the fourth embodiment is the fourth case. Since more lubricant is supplied to the side surface 16a than in the case of this embodiment, it is effective for preventing fretting wear of the side surface 16a of the elastic ring 16 especially for a large planetary roller type power transmission device.

(Sixth embodiment)
Further, a sixth embodiment of the present invention will be described with reference to FIG.
FIG. 10 is a front view of a planetary roller power transmission device according to a sixth embodiment, which is a partial cross-sectional view and corresponds to FIG.

In the planetary roller type power transmission device 6 shown in the figure, the same structure as that of the fifth embodiment is denoted by the same symbol, and redundant description is omitted. For example, a sponge-like lubricating oil holder 43 that contacts the inner wall of the housing 11 is attached to the blade 41.
The operation of the planetary roller type power transmission device 6 will be described. The lubricating oil holder 43 holding the lubricating oil of the oil surface 20a comes into contact with the inner wall of the housing 11 and the lubricating oil is applied to the location 11c. The lubricating oil 11c can permeate the side surface 16a of the elastic ring 16 to prevent fretting wear on the side surface 16a.

  From the fourth embodiment to the sixth embodiment, the lubricating oil adhered or applied to the location 11c of the inner wall of the housing 11 is permeated into the side surface 16a of the elastic ring 16 fitted in the groove 11a in the housing 11. About three cases of embodiment, it can choose suitably according to the size of a planetary roller type power transmission device, and lubrication performance of side 16a required.

(Seventh embodiment)
Next, a seventh embodiment of the present invention will be described with reference to FIGS.
FIG. 11 is a front view of a planetary roller power transmission device according to a seventh embodiment, which is a partial cross-sectional view and corresponds to FIG.
12 is a cross-sectional view taken along the line DD of FIG.

In the planetary roller type power transmission device 7 shown in the figure, the same structure as that of the fourth embodiment is denoted by the same symbol, and redundant description is omitted. Above the carrier 180 and the disk 45, a hole 48 opened to the inner chamber 11b is opened in the vicinity of the groove 11a in which the elastic ring 16 of the housing 11 is fitted. A hole 48a is opened toward the corner of the groove 11a in which the elastic ring 16 is fitted.
In the above description, the case where the hole 48 and the hole 48a are provided in the planetary roller type power transmission device 4 is shown. However, the planetary roller type power transmission device 5 of FIGS. For the planetary roller power transmission device 6 of FIG. 109, which is the sixth embodiment, the hole 48 and the hole 48a may be provided in the same manner, but there are many overlapping portions. Illustration and detailed description are omitted.

The operation of the seventh embodiment will be described. When the carrier 180 and the disk 45 rotate in the direction of the arrow 180a, the blades 40 attached to the outer peripheral surfaces of the carrier 180 and the disk 45 are in the lubricating oil immersion part 20. Lubricating oil is raked up and scattered above the inner chamber 11 b of the housing 11. The scattered lubricating oil is supplied to the upper portion of the side surface 16a of the elastic ring 16 through the hole 48 and the hole 48a, so that fretting wear of the side surface 16a can be prevented.
According to the present embodiment, since the lubricating oil can be directly supplied to the side surface 16a through the hole 48 and the hole 48a, the lubricating oil can be more reliably supplied to the side surface 16a.

It is a front view of a planetary roller type power transmission device according to the present invention, and is a partial sectional view. It is AA sectional drawing of FIG. FIG. 2 is a view corresponding to FIG. 1 and shows a case where a core yarn is inserted into a pipe 25. It is a front view of the planetary roller type power transmission device of 2nd Embodiment, is a partial cross section figure, and is a figure equivalent to FIG. It is side surface sectional drawing of the planetary roller type power transmission device of 3rd Embodiment, and is a figure equivalent to FIG. It is a front view of the planetary roller type power transmission device of 4th Embodiment, is a partial cross section figure, and is a figure equivalent to FIG. It is BB sectional drawing of FIG. It is a front view of the planetary roller type power transmission device of 5th Embodiment, and is a partial cross section figure, and is a figure equivalent to FIG. It is CC sectional drawing of FIG. It is a front view of the planetary roller type power transmission device of 6th Embodiment, and it is a partial sectional view, and is a figure equivalent to FIG. It is a front view of the planetary roller type power transmission device of 7th Embodiment, and is a partial cross section figure, It is a figure equivalent to FIG. It is DD sectional drawing of FIG.

Explanation of symbols

1-7 Planetary roller type power transmission device 11 Housing 11a Groove 11b Inner chamber 12 (within housing) Sun rollers 12a, 120a Input shafts 13, 19, 22 Bearing 15 Planetary roller 16 Elastic ring 16a Side surface 17 of elastic ring 18, 180 Carrier 18f Ring 18h Lubricant oil scraping hole
20 Lubricating oil immersion part 20a Oil level 21 Output shaft 25 Piping 25b, 25e Branch piping 30 Pump 40, 41 Blade 42, 43 Lubricating oil holder 45 Discs 48, 48a Hole
e Eccentricity

Claims (12)

A solar roller, an elastic ring fitted in a groove in the housing, and a plurality of planetary rollers are arranged between the outer peripheral surface of the sun roller and the inner peripheral surface of the elastic ring so as to freely roll at an equal angle. In the planetary roller type power transmission device which rotatably supports the planetary roller on a shaft fixed to a carrier,
An opening is provided on the side of the carrier of the lubricating oil immersion portion in the housing, and a pipe for supplying the lubricating oil from the lubricating oil immersion portion to the side surface of the upper portion of the elastic ring fitted into the groove in the housing is provided. ,
Planetary roller type power transmission apparatus characterized by being constituted by eccentric center of the carrier from a center of said sun roller. In the planetary roller power transmission device according to claim 1 ,
Planetary roller type power transmission device being characterized in that so as to feed the lubricating oil in the lubricating oil immersion section to the pipe by a so-called Misosuri rotation of the carrier constructed by the eccentric (precession). In the planetary roller type power transmission device according to claim 1 or 2 ,
A planetary roller type motive power characterized in that a pump is provided inside or outside the housing, the pump is incorporated in the pipe, and the lubricating oil is fed from the lubricating oil immersion section into the pipe by the action of the pump. Transmission device. In the planetary roller power transmission device according to claim 3 ,
In the middle of the piping that feeds the lubricating oil from the lubricating oil immersion portion, a hole having an opening in the lubricating oil immersion portion is joined, and the pump is provided with a piston provided in the hole, a rod of the piston, The pump is operated by the rotation of the carrier as a pump composed of a roller that rotates around a pin provided at the other end of the rod and a spring that acts to press the roller against the outer peripheral surface of the carrier. A planetary roller-type power transmission device characterized by being configured as described above. In the planetary roller type power transmission device according to any one of claims 1 to 4 ,
In the piping for feeding the lubricating oil from the lubricating oil immersion part, a core thread is incorporated which sucks the lubricating oil and feeds it to the side surface of the upper portion of the elastic ring fitted into the groove in the housing by capillary action. Planetary roller type power transmission device. In the planetary roller power transmission device according to any one of claims 1 to 5 ,
A planetary roller power transmission device, wherein one or more lubricating oil scraping holes are provided in an outer peripheral portion of the carrier. In the planetary roller type power transmission device according to any one of claims 1 to 6 ,
A planetary roller power transmission device, wherein a piping for feeding lubricating oil from the lubricating oil immersion portion is further extended to the bearing of the input shaft or the bearing of the output shaft. A solar roller, an elastic ring fitted in a groove in the housing, and a plurality of planetary rollers are arranged between the outer peripheral surface of the sun roller and the inner peripheral surface of the elastic ring so as to freely roll at an equal angle. In the planetary roller type power transmission device which rotatably supports the planetary roller on a shaft fixed to a carrier,
Provided on the outer peripheral portion of the carrier is a blade for scooping up the lubricating oil from the lubricating oil immersion portion in the housing, and the lubricating oil scattered and adhered by the blade is grooved in the housing of the elastic ring from the upper part of the inner wall of the housing. Infiltrate the side of the upper part of the fitting part to lubricate the side,
A planetary roller power transmission device , wherein the center of the carrier is eccentric from the center of the sun roller . The planetary roller power transmission device according to claim 8 ,
Further, a disk that rotates together with the sun roller is disposed in a direction opposite to the carrier side of the elastic ring, and a blade that scoops up the lubricating oil from the lubricating oil immersion part is provided on the outer periphery of the disk. A planetary roller characterized in that lubricating oil scattered and adhered by the blades is permeated from the upper part of the inner wall of the housing to the side face of the upper part of the fitting portion of the elastic ring into the groove in the housing, thereby lubricating the side face. Type power transmission device. The planetary roller power transmission device according to claim 8 or 9 ,
A planetary roller type power transmission device comprising a lubricating oil holding body for holding the lubricating oil scattered and attached to the outer peripheral side end of the blade. The planetary roller power transmission device according to claim 10 ,
The lubricant holding body is brought into contact with at least the upper part of the inner wall of the housing, and the contact penetrates the lubricating oil from the upper part of the inner wall of the housing to the side surface of the upper part of the fitting portion of the elastic ring in the groove in the housing. And a planetary roller power transmission device characterized in that the side surface is lubricated. The planetary roller power transmission device according to any one of claims 8 to 11 ,
A hole is provided above the carrier or disk having the blades so as to communicate from the inner wall of the housing to the side surface of the upper portion of the fitting of the elastic ring into the groove in the housing, and the blade or the lubricating oil holding body is formed through the hole. A planetary roller power transmission device characterized in that lubricating oil scattered and adhered by rotation is guided to the side surface.

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