JP5203988B2 - Lubricating device for planetary gear unit - Google Patents

Description

  The present invention relates to a lubricating device for a large planetary gear device used as a speed increaser or a speed reducer for a large wind power generator, construction machine or the like.

In a planetary gear device, a sun gear directly connected to a high-speed shaft, a ring gear fitted in a casing, and a plurality of planetary gears can freely roll at an equal angle between an outer tooth of the sun gear and an inner tooth of the ring gear. In many cases, the planetary gear is arranged so that the planetary gear is rotatably supported on a planetary pin fixed to a carrier via a bearing, and a low-speed shaft is integrally provided on the carrier.
Most of the lubrication methods are oil bath lubrication, and the planetary gear is revolved and is immersed in the oil bath when it is positioned at the bottom, but when the operation is stopped, it is immersed in the lubricant. There will be no bearings. For this reason, various types of lubricating devices have been proposed in order to prevent them from seizing. (Patent Documents 1, 2, and 3)
In particular, in wind power generators, the operation may be stopped for a long time depending on the wind conditions, or the carrier may rotate at a very low speed, and the lubricant in the planetary gears that are not immersed in the oil bath will cause the lubricant to flow down, Lubricant running out may occur. If the operation is restarted due to a change in the wind condition from that state, the lubrication of the bearing may be poor and smooth operation may be impaired, leading to a decrease in wind power generation efficiency and a decrease in the life of the bearing. However, the conventional lubrication device has a problem that the lubrication function cannot be performed, and the cost of the device becomes too high, which is suitable for a large planetary gear device used for a wind power generator or the like. It is desired to provide an inexpensive lubricating device.

Japanese Patent Laid-Open No. 2000-240771 (FIG. 1) Japanese Patent Laying-Open No. 2004-270736 (FIG. 3) Japanese Patent Laying-Open No. 2005-282593 (FIGS. 1 and 2)

According to Patent Document 1, a lubrication device for a planetary gear device is provided with a hole serving as a lubricant reservoir for collecting lubricant on a support shaft (planet pin) attached to a carrier, and the lubricant reservoir is provided with a lubricant. When the planetary gear unit is in operation, the valve is opened by the pumping of the lubricant by a pump or the like, and the pumping of the lubricant is stopped. As a configuration in which the valve is closed by its own weight, the outflow of the lubricant from the lubricant reservoir is prevented during the stop.
However, the lubrication device of the planetary gear device disclosed in Patent Document 1 is premised on the pumping of the lubricant by the pump or the pumping of the lubricant by the centrifugal force by the rotation of the carrier, and the former is expensive due to the installation of the pump. There was a problem of becoming. In the latter case, the carrier can be pumped by centrifugal force when the carrier is rotating at a high speed, and it is considered that the latter cannot be used in a low-speed rotating planetary gear device.

According to Patent Document 2, the lubricating device for the planetary gear device introduces lubricating oil into the axial oil passage of the support pin (planetary pin) that supports the rotation of the planetary gear (planetary gear) through the needle bearing. An introduction plate having a curved oil passage is provided so that the lubricating oil is sufficiently introduced into the axial oil passage of the support pin even when the planetary gear stops rotating.
However, in the lubricating device for the planetary gear device of Patent Document 2, the shape of the oil passage of the introduction plate is complicated, and it takes a lot of time for experiment and design when determining the oil passage, and mass production of the planetary gear device is performed. In this case, the oil passage can be processed by using a mold or the like, but when a small amount of planetary gear devices are produced, there is a problem that the processing cost becomes expensive.

Further, according to Patent Document 3, the lubricating device for the planetary gear device introduces lubricating oil into the axial oil passage of the pinion shaft (planetary pin) that supports the rotation of the pinion gear (planetary gear) through the needle roller. When the carrier is stationary, a rotating body consisting of a plate-shaped member and a resin washer, and a receiver on the side of the carrier corresponding to the resin washer are provided with a receiver, and even when the carrier is stationary, the rotating member rotates to lubricate with centrifugal force. It is said that the oil can be supplied to the receiver one after another, so that the lubricating oil can be introduced into the axial oil passage of the pinion shaft.
However, the lubricating device of the planetary gear device of Patent Document 3 is effective when the shaft is rotating while the carrier is stopped, and it is effective between the carrier brake mechanism, the shaft integrated with the ring gear, and the rotating member. It is premised on having a clutch mechanism, and there is a problem that a complicated structure of installing a brake mechanism and a clutch mechanism is required.

  The present invention is particularly applicable to a large-sized low-speed rotating planetary gear device, even when the planetary gear device is operating or stopped, even when the planetary pin reaches the upper part of the casing and is away from the lubricating oil bath. Lubricating oil can be introduced into the bearing between the planetary pin and the planetary gear by holding the lubricating oil in the hole. It is an object of the present invention to provide a lubricating device that can introduce lubricating oil to the surface and can be realized at low cost.

The present invention solves the above problems by the following means.
(1) A planetary gear unit lubrication device of a first means includes a sun gear directly connected to a high-speed shaft, a ring gear fitted in a casing, a plurality of gears between outer teeth of the sun gear and inner teeth of the ring gear. In a planetary gear device in which a planetary gear is rotatably arranged at an equal angle, the planetary gear is rotatably supported via a bearing on a planetary pin fixed to a carrier, and a low-speed shaft is integrally provided on the carrier. The planetary pin is provided with an axial hole, and an introduction hole through which the lubricating oil can be introduced from the axial hole is provided, and the opening of the axial hole is provided by an opening / closing lid provided at an end of the axial hole. The shaft hole is opened when the shaft hole is immersed in the lubricating oil bath in the casing, and lubricating oil is introduced into the shaft hole, and the shaft hole is removed from the lubricating oil bath. It is closed when leaving and the lubricating oil is held in the shaft hole. The bearing via the introduction hole is to be lubricated, closing by relatively swinging the said axis Kokoroana pins provided near the shaft Kokoroana the lid at both ends of the planetary pin as a fulcrum The position of the pin and the shape of the opening / closing lid, when the planetary gear reaches the lower part of the revolution orbit, and the revolution orbit The opening / closing lid is configured to open the opening of the axial hole when it reaches the upper part of the opening or at an appropriate time (appropriate timing).

(2) The lubricating device for the planetary gear unit of the second means can introduce the lubricating oil introduced into the bearing toward the tooth surface of the planetary gear in the lubricating device of the planetary gear unit of the first means. As described above, the planetary gear is provided with an introduction hole so that the tooth surfaces of the planetary gear, the sun gear, and the ring gear are lubricated.

According to the present invention, a sun gear directly connected to a high-speed shaft, a ring gear fitted in a casing, and a plurality of planetary gears at an equal angle between an outer tooth of the sun gear and an inner tooth of the ring gear. A planetary gear device that is rotatably arranged, rotatably supports a planetary pin fixed to a carrier via a bearing, and has a low-speed shaft integrally provided on the carrier. A hole is provided, and an introduction hole through which lubricating oil can be introduced into the bearing from the shaft hole is provided, and the opening of the shaft hole can be opened and closed by an opening / closing lid provided at an end of the shaft hole. When the shaft hole is immersed in the lubricating oil bath in the casing, the lubricating oil is introduced into the shaft hole, and when the shaft hole is separated from the lubricating bath, the shaft hole is closed. Lubricating oil is held in the core hole, By serial bearing has to be lubricated, an effect that can be provided an inexpensive lubricator large planetary gear is not caused poor lubrication during even restarting operation and shutdown extended low-speed operation.
Further, the opening / closing lid can be opened / closed by swinging relative to the shaft center hole with pins provided in the vicinity of the shaft center hole at both ends of the planetary pin as fulcrums, and the opening / closing cover has its own weight. The position of the pin and the shape of the opening / closing lid are set so as to always face in a certain direction, when the planetary gear reaches the lower part of the revolution orbit, and when the upper part of the revolution orbit, or at an appropriate time ( By configuring the opening / closing lid to open the opening of the shaft hole at an appropriate timing, it is possible to provide an inexpensive lubricating device that can reliably hold the lubricating oil in the shaft hole.

According to a second aspect of the present invention, in the lubricating device for a planetary gear device according to the first aspect, the introduction hole is provided so that the lubricating oil introduced into the bearing can be introduced toward the tooth surface of the planetary gear. By providing the planetary gear, the lubricating oil can be further introduced into the meshing tooth surface of the planetary gear and the sun gear or the ring gear from the shaft center hole of the planetary pin via the bearing portion. Even if the large-scale planetary gear device operated at a low speed is stopped for a long time, there is an effect that it is possible to provide an inexpensive lubricating device that does not cause poor lubrication when the operation is resumed.

It is side surface sectional drawing of the principal part of the planetary gear apparatus which comprised the lubrication apparatus concerning this invention. In FIG. 1A, only the portion related to the lubrication device is shown, and the revolution of the planetary pin is divided to show the state change of the lubrication device. It is side surface sectional drawing of the principal part of the planetary gear apparatus which comprised the lubricating device of the 1st reference example , and it is a partly cut | disconnected, and is a figure equivalent to FIG. FIG. 4 is an enlarged view of the lubricating device section of FIG. 3. It is side surface sectional drawing of the principal part of the planetary gear apparatus which comprised the lubricating device of the 2nd reference example , and is a figure equivalent to FIG. In the cross-sectional view BB in FIG. It is side surface sectional drawing of the principal part of the planetary gear apparatus which comprised the lubricating device of the 3rd reference example , and is a figure equivalent to FIG. In the cross-sectional view taken along the line DD of FIG.

  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 side sectional view of an essential part of a planetary gear device that constitutes a lubricating device according to the present invention.
FIG. 2 is a view as viewed from A in FIG. 1 and shows only the portion related to the lubricating device, and shows the change in the state of the lubricating device by dividing the revolution of the planetary pin.

  In the figure, a planetary gear device 20 has a sun gear 1, a plurality (four in the figure) of planetary gears 2 meshed with external teeth of the sun gear 1 and arranged at an equal angle, and the same axis as the sun gear 1. A plurality of planetary gears 2 are adjacent to each other, and the outer teeth of the planetary gears 2 and the ring gear 3 with which the inner teeth mesh with each other are provided.

The high speed shaft 5 integrally formed with the sun gear 1 is supported by a bearing (not shown) in the casing 4 so as to rotate around the axis C. The ring gear 3 has an outer peripheral surface in the groove 4 a of the casing 4. It is inserted. The planetary gear 2 is rotatable through a bearing 9 and an outer peripheral surface of a planetary pin 6 whose inner peripheral surface is integrally formed with the carrier 7.
A carrier 7a is provided on the opposite side to the carrier 7 side of the planetary pin 6 and is connected to the carrier 7 by a connecting rod (not shown), and the planetary pin 6 is supported by the carrier 7 and the carrier 7a. .
The low speed shaft 8 configured integrally with the carrier 7 is supported by a bearing (not shown) in the casing 4 and rotates around the axis C.

The planetary pin 6 is formed with a shaft hole 10 penetrating through the shaft center, and further, one or necessary for introducing lubricating oil into the bearing 9 from the shaft hole 10 toward the outer peripheral surface of the planet pin 6. Due to this, several introduction holes 11 are opened.
The planetary gear 2 is provided with one introduction hole 12 for introducing lubricating oil from the bearing 9 side toward the tooth surface side or several introduction holes 12 as necessary.

Opening and closing lids 13 are provided at both end faces of the planetary pin 6 so as to swing around the pin 14 as a fulcrum. At this time, the shaft center hole 10 is always directed to a certain vertical direction by its own weight, and the shaft center hole 10 is opened at the lower end position and the upper end position in the revolution of the planetary pin 6. Notches 13a and 13b are provided in the portion engaged with the.
As a result, when the planetary pin 6 is below the oil surface 15 a of the lubricating oil bath 15, the lubricating oil naturally flows into the axial hole 10. Further, when the planetary pin 6 is near the upper end of the revolution, air can flow into the axial hole 10.
As described above, the lubrication device 20a of the planetary gear device 20 includes the shaft hole 10, the introduction hole 11, the introduction hole 12 opened in the planetary gear 2, and the planetary pin 6 open to the planetary pin 6. It is comprised from the opening-and-closing lid | cover 13 of the both end surfaces, the pin 14, etc. FIG.

Next, the operation of the lubricating device 20a of the planetary gear device 20 according to the present embodiment will be described.
When the sun gear 1 rotates around the axis C, the planetary gear 2 rotates and revolves by meshing with the external teeth of the sun gear 1 and the internal teeth of the ring gear 3, and the carrier 7 integrated with the low speed shaft 8 is Around the center C, the planetary pin 6 rotates in the direction of the arrow 8a, and the planetary pin 6 revolves in the direction of the arrow 8a.

Even if the carrier 7 rotates, the open / close lid 13 swings while changing its position relative to the axial hole 10 opened in the planetary pin 6 while maintaining a constant vertical direction with the pin 14 as a fulcrum by its own weight. Move.
When the planetary pin 6 is immersed under the oil surface 15a of the lubricating oil bath 15 in the casing 4 due to its revolution, the shaft hole 10 is gradually opened by the notch 13a formed in the opening / closing lid 13, When the planetary pin 6 reaches the lowest end of revolution, the shaft hole 10 is completely opened by the notch 13a. Thereafter, the shaft hole 10 is gradually closed by the opening / closing lid 13 and is completely closed by the opening / closing lid 13 until it rises to the oil level 15a.
When the shaft hole 10 is opened by the notch 13 a of the opening / closing lid 13, the lubricating oil in the lubricating oil bath 15 naturally flows into the shaft hole 10, and is completely removed by the rear opening / closing lid 13. In the closed state, the lubricating oil remains retained in the shaft hole 10.

  When the planetary pin 6 comes near the upper end of the revolution, the opening / closing lid 13 that has closed the axial hole 10 changes the relative position with respect to the axial hole 10, and the notch formed in the opening / closing lid 13. When the shaft hole 10 is gradually opened by 13b and the planetary pin 6 reaches the uppermost end of the revolution, the shaft hole 10 is completely opened by the notch 13b.

When the shaft hole 10 is opened by the notch 13 b of the opening / closing lid 13, air enters the shaft hole 10.
The lubricating oil held in the shaft hole 10 is gradually fed from the shaft hole 10 to the bearing 9 through the introduction hole 11 and further from the bearing 9 even if the shaft hole 10 remains closed. It is introduced into the meshing tooth surface of the planetary gear 2 and the sun gear 1 and the meshing tooth surface of the planetary gear 2 and the ring gear 3 via the introduction hole 12 of the planetary gear 2. However, the introduction of the lubricating oil from the introducing hole 11 or the introducing hole 12 is little by little due to the surface tension of the lubricating oil.
When air enters the shaft hole 10, the balance of the lubricating oil is lost due to the inflow of the surface tension of the lubricant, and the lubricant is introduced from the shaft hole 10 into the bearing 9 through the introduction hole 11. The bearing 9 is lubricated. The meshing teeth are introduced from the bearing 9 into the meshing tooth surface of the planetary gear 2 and the sun gear 1 and the meshing tooth surface of the planetary gear 2 and the ring gear 3 via the introduction hole 12 of the planetary gear 2. The surface is lubricated.

  Thus, since the shaft hole 10 opens when reaching the upper part of the revolution orbit and when the planetary gear 2 reaches the lower part of the revolution orbit, it is possible to freely adjust the outflow of the lubricating oil at an appropriate timing. It is. In addition to the above configuration, the timing at which the lubricating oil flows out can be freely adjusted by adjusting the positions of the notches 13a and 13b of the opening / closing lid 13.

( First Reference Example )
Next, a first reference example of the present invention will be described with reference to FIGS.
FIG. 3 is a side cross-sectional view of the main part of the planetary gear device that constitutes the lubricating device of the first reference example , and corresponds to FIG. 1.
FIG. 4 is an enlarged view of the lubricating device section of FIG.

In the illustrated planetary gear device 30, the same structure as that of the first embodiment is denoted by the same symbol, and redundant description is omitted. The lubricating device 30a is configured by providing a one-way valve 31 in place of the opening / closing lid 13 and the pin 14 of the first embodiment, and the one-way valve 31 is provided at both end portions of the shaft hole 10 that penetrates. Lubricating oil is allowed to flow inside, but it is prevented from flowing out.
The one-way valve 31 is a stopper having a hole 31a at the center thereof, and the inside of the axial hole 10 forms a recess 10h indicated by a two-dot chain line in the figure due to a step formed by the stopper. .
The one-way valve 31 is not limited to the one having the hole 31a as described above, and allows the lubricating oil to flow in from the outside to the inside, but prevents outflow from the inside to the outside. Of course, other structures may be used.

Next, the operation of the lubricating device 30a of the planetary gear device 30 according to the first reference example will be described. When the planetary pin 6 is immersed under the oil surface 15a of the lubricating oil bath 15 in the casing 4 due to its revolution, the lubricating oil passes through the holes 31a of the one-way valve 31 provided at both ends in the shaft hole 10. Then, it flows into the recess 10h and is held in the recess 10h during the revolution of the planetary pin 6.
During the revolution or stop of the planetary pin 6, the lubricating oil in the shaft center hole 10 is gradually introduced into the bearing 9 through the introduction hole 11, and the bearing 9 is lubricated. Further, it is introduced from the bearing 9 through the introduction hole 12 to the meshing tooth surface of the planetary gear 2 and the sun gear 1 and the meshing tooth surface of the planetary gear 2 and the ring gear 3 to lubricate the meshing tooth surface. The
The one-way valve 31 having the hole 31a is effective because there is a margin in the inflow time of the lubricating oil from the hole 31a when the revolution of the planetary pin 6 is low, and the device cost of the lubricating device 30a is effective. Is cheap.

( Second reference example )
Next, a second reference example of the present invention will be described with reference to FIGS.
FIG. 5 is a side cross-sectional view of the main part of the planetary gear device that constitutes the lubricating device of the second reference example , and corresponds to FIG. 1.
6 is a cross-sectional view taken along the line BB in FIG.

In the illustrated planetary gear device 40, the same structure as that of the first embodiment is denoted by the same symbol, and redundant description is omitted. At both ends of the shaft hole 10, a lubricating oil receiving portion 16c is provided on the centripetal side of the revolution of the planetary pin 6 at a position where one end protrudes outside the shaft hole 10, and the revolution of the planetary pin 6 is performed. A lubricating oil receiving pin 16 having a hole 16 a having an opening 16 b opened on the centrifugal side and having the other end opened inward of the axial hole 10 is fitted. The carrier 7 is provided with a lubricating oil cup 41 having an oil sump bulge 41 a at the bottom on the centripetal side of rotation at a position corresponding to the lubricating oil receiving pin 16 at the circumference thereof. When the lubricating oil cup 41 is immersed in the lubricating oil bath 15 by the rotation of the lubricating oil, the lubricating oil is scooped up and held. It is supposed to be.
The swelling 41a of the lubricating oil cup 41 prevents all of the lubricating oil from flowing out due to the inclination of the revolution of the lubricating oil cup 41 before the lubricating oil cup 41 reaches the uppermost end by the rotation of the carrier 7. In this configuration, most of the lubricating oil in the lubricating oil cup 41 is dropped onto the lubricating oil receiver 43 in the vicinity of the uppermost end.
The lubricating oil dropped on the lubricating oil receiver 43 is introduced into the opening 16b of the lubricating oil receiving pin 16 via a guide rod 44 connected to the lubricating oil receiver 43, and the lubricating oil The receiver 43 is attached to the casing 4 via a support tool 45.
As described above, the lubricating device 40a of the planetary gear device 40 is configured by the lubricating oil receiving pin 16, the lubricating oil cup 41, the lubricating oil receiver 43, the guide rod 44, and the like.
The lubricating device 40a may have a double structure provided also on the carrier 7a side.

Next, the operation of the lubricating device 40a of the planetary gear device 40 according to the second reference example will be described. When the carrier 7 rotates in the direction of the arrow 8a and the lubricating oil cup 41 is immersed in the lubricating oil bath 15, the lubricating oil is scooped up and held, and when the lubricating oil cup 41 comes to the top, the lubricating oil cup 41 With the inclination of 41, the lubricating oil in the lubricating oil cup 41 is dripped onto the lubricating oil receiver 43 and passes through the guide rod 44, the opening 16b of the lubricating oil receiver pin 16, the lubricating oil receiver 16c, and the hole 16a. It is introduced into the axial hole 10 of the planetary pin 6.
The planetary pin 6 revolves while holding the lubricating oil confined in the concave portion of the axial hole 10 by the step formed by the lubricating oil receiving pin 16 in the axial hole 10. During the revolution or stop, the lubricating oil is gradually introduced into the bearing 9 through the introduction hole 11 and the bearing 9 is lubricated. Furthermore, it is also introduced into the meshing tooth surface of the planetary gear 2 and the sun gear 1 and the meshing tooth surface of the planetary gear 2 and the ring gear 3 from the bearing 9 through the introduction hole 12, and the meshing tooth surface is lubricated. The
In the second reference example , a relatively large amount of lubricating oil is sprinkled from the lubricating oil bath 15 with the lubricating oil cup 41, and the lubricating oil dropped from the lubricating oil cup 41 as described above is used as the lubricating oil receiver. 43, the guide rod 44, the opening 16b of the lubricating oil receiving pin 16, the lubricating oil receiver 16c, and the hole 16a are introduced into the axial hole 10 of the planetary pin 6 in a short time, so that the revolution of the planetary pin 6 is high speed. Even in this case, a large amount of lubricating oil is reliably introduced.
The lubricating oil cup 41 is pivotally supported by a pin or the like (not shown) with respect to the carrier 7 and is attached so as to be rotatable only in the clockwise direction. The lubricating oil cup 41 faces the lubricating oil receiver 43. In this range, the cylinder 47 with the pusher fixed to the casing 4 is operated, and in FIG. 6, the cup 41 is rotated 90 degrees in the clockwise direction so that the lubricating oil is dripped onto the lubricating oil receiver 43. May be.

( Third reference example )
A third reference example of the present invention will be described with reference to FIGS.
FIG. 7 is a side cross-sectional view of the main part of the planetary gear device that constitutes the lubricating device of the third reference example , and corresponds to FIG.
FIG. 8 is a sectional view taken along the line DD of FIG.

In the illustrated planetary gear device 60, the same structure as that of the first embodiment is denoted by the same symbol, and redundant description is omitted. An elastic, for example, sponge-like oil-absorbing lubricating oil holder 61 that absorbs and holds the lubricating oil corresponding to the position of the lubricating oil receiving pin 16 is attached to the circumferential portion of the carrier 7 via a pin 62. It has been. When the oil-absorbing lubricating oil holder 61 is immersed in the lubricating oil bath 15 by the rotation of the carrier 7 in the direction of the arrow 8a, the lubricating oil is absorbed and even if the oil-absorbing lubricating oil holder 61 is positioned above the oil surface 15a of the lubricating oil bath 15. While holding the lubricating oil, the carrier 7 is lifted upward.
When the oil-absorbing lubricant holder 61 is moved upward by the rotation of the carrier 7, the oil-absorbing lubricant holder 61 is shaped to be crushed by a pair of cams 65 and the retained lubricant is squeezed out. Thus, the squeezed lubricating oil is received by the lubricating oil receiver 43. The pair of cams 65 are attached to the casing 4 by a support tool 66, and the lubricating oil receiver 43 is attached to the casing 4 by a support tool 45. Here, the lubricating oil squeezing out from the oil-absorbing lubricating oil holder 61 is not limited to the structure of the pair of cams 65, and may have another structure.
As described above, the lubricating device 60a of the planetary gear device 60 includes the oil-absorbing lubricating oil holder 61, the pair of cams 65, 65, the lubricating oil receiving pin 16, the lubricating oil receiver 43 described in the third reference example , It is composed of a guide rod 44 and the like.
The lubricating device 60a may have a double structure provided also on the carrier 7a side.

Next, the operation of the lubricating device 60a of the planetary gear device 60 according to the third reference example will be described. When the oil-absorbing lubricant holder 61 is immersed in the lubricant bath 15 by the rotation of the carrier 7, the oil-absorbing lubricant holder 61 absorbs and holds the lubricant, and the oil-absorbing lubricant holder 61 comes to the top. And the pair of cams 65, 65 are engaged to squeeze out the lubricating oil held in the oil-absorbing lubricating oil holder 61 and hang down on the lubricating oil receiver 43. Further, the guide rod 44, the lubricating oil receiver It is introduced into the axial hole 10 of the planetary pin 6 through the opening 16b of the pin 16, the lubricating oil receiver 16c, and the hole 16a.
Similar to the description in the second reference example , the planetary pin 6 revolves while retaining the lubricating oil confined in the concave portion of the axial hole 10 by the step formed by the lubricating oil receiving pin 16 in the axial hole 10. . During the revolution or stop, the lubricating oil is gradually introduced into the bearing 9 through the introduction hole 11 and the bearing 9 is lubricated. Furthermore, it is also introduced into the meshing tooth surface of the planetary gear 2 and the sun gear 1 and the meshing tooth surface of the planetary gear 2 and the ring gear 3 from the bearing 9 through the introduction hole 12, and the meshing tooth surface is lubricated. Is done.
Also in the third reference example , as in the description in the second reference example , a relatively large amount of lubricating oil is scooped up from the lubricating oil bath 15 by the oil-absorbing lubricating oil holder 61, and as described above, Lubricating oil dropped by engagement with the pair of cams 65, 65 from the oil-absorbing lubricating oil holder 61 is supplied with the lubricating oil receiver 43, the guide rod 44, the opening 16b of the lubricating oil receiving pin 16, the lubricating oil receiver 16c, and the hole. Since it introduces into the axial center hole 10 of the planetary pin 6 via 16a in a short time, even if the revolution of the planetary pin 6 is high-speed, it has the characteristic that lubricating oil introduction is performed reliably.

In the description from the first embodiment to the third reference example , the case where the axial hole 10 provided in the planetary pin 6 is a through hole is shown, but only one of the axial holes 10 is opened and the other is It may be a closed hole.

As described above, in the first embodiment, the opening of the shaft hole 10 opened in the planetary pin 6 is opened and closed by the action of the opening / closing lid 13 so as to be immersed in the lubricating oil bath 15. The naturally flowing lubricating oil can be held in the shaft hole 10. Further, in the first reference example , the one-way valve 31 provided at the opening of the shaft hole 10 holds the lubricating oil that has been immersed in the lubricating oil bath 15 and naturally flows in the recess of the shaft hole 10. be able to. Further, in the second reference example , the lubricating oil soaked in the lubricating oil bath 15 by the lubricating oil cup 41 provided on the rotating body is dropped, and the lubricating oil receiver 43, the guide rod 44, and the lubricating oil receiving pin are dropped. 16 or the like can be introduced and held in the recess of the axial hole 10 opened in the planetary pin 6. In the third reference example , an axis centered on the planetary pin 6 by the oil absorbing lubricant holder 61, the pair of cams 65, the lubricant receiving pin 16, the lubricating oil receiver 43, the guide rod 44, the lubricating oil receiving pin 16, and the like. Lubricating oil can be introduced and held in the recess of the hole 10.

  In this way, by holding the lubricating oil in the axial hole 10 of the planetary pin 6, even if the planetary gear unit may be stopped for a long time, the bearing 9 and the planetary gear 2 and the sun gear are immediately restored when the operation is resumed. The lubricating oil can be supplied to the meshing tooth surface of No. 1 or the meshing tooth surface of the planetary gear 2 and the ring gear 3, so that it is possible to provide a low-cost lubricating device without causing lubrication failure.

DESCRIPTION OF SYMBOLS 1 Sun gear 2 Planetary gear 3 Ring gear 4 Casing 6 Planetary pin 7, 7a Carrier 9 Bearing 10 Shaft center hole 11 Introduction hole 12 Introduction hole 13 Opening / closing lids 13a, 13b Notch 14 (opening / closing lid) 14 Pin 15 Lubricating oil bath 16 Lubricating oil Receiving pin 16a Hole 16b (for lubricating oil receiving pin) Opening 16c (for lubricating oil receiving pin) Lubricating oil receiving portion 20, 30, 40, 60 (for lubricating oil receiving pin) Planetary gear units 20a, 30a, 40a, 60a Lubricating device 31 One-way valve 41 Lubricating oil cup 43 Lubricating oil receiver 44 Guide rod 47 Cylinder 61 with pusher Oil absorbing lube holder 65 Pair of cams

Claims (2)

A sun gear directly connected to a high-speed shaft, a ring gear fitted in a casing, and a plurality of planetary gears arranged between an outer tooth of the sun gear and an inner tooth of the ring gear so as to be freely rotatable at an equal angle, the planet In a planetary gear device in which a gear is rotatably supported on a planetary pin fixed to a carrier via a bearing, and a low-speed shaft is integrally provided on the carrier, the planetary pin is provided with a shaft hole, and the shaft center An introduction hole through which lubricating oil can be introduced from the hole into the bearing is provided, and the opening of the shaft hole can be opened and closed by an opening / closing lid provided at an end of the shaft hole. Opened when immersed in the lubricating oil bath in the casing, the lubricating oil is introduced into the axial hole, and closed when the axial hole is separated from the lubricating oil bath, the lubricating oil is held in the axial hole. The bearing is lubricated via the introduction hole ,
The opening / closing lid can be opened / closed by swinging relative to the shaft center hole with pins provided in the vicinity of the shaft hole at both ends of the planetary pin, and the opening / closing cover is always constant under its own weight. The position of the pin and the shape of the opening / closing lid are adjusted so that the planetary gear reaches the lower part of the revolution orbit and the upper part of the revolution orbit, or at an appropriate time (appropriate The planetary gear unit lubrication device is characterized in that the opening / closing lid opens the opening of the shaft hole at the timing . 2. The planetary gear device lubrication device according to claim 1 , wherein an introduction hole is provided in the planetary gear so that the lubricating oil introduced into the bearing can be introduced toward a tooth surface of the planetary gear. Lubricating device for planetary gear device, wherein tooth surfaces of sun gear and ring gear are lubricated.

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