JP2014095438A - Lubrication device of composite planetary gear mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify a mounting structure of an oil catch plate to a carrier of a composite planetary gear mechanism while suppressing oil leakage to the external from between the carrier and the oil catch plate.SOLUTION: In a lubrication device of a composite planetary gear mechanism in which an oil catch plate for collecting an oil scattered by centrifugal force, and introducing the same to an oil passage formed on a pinion shaft of a second planetary gear mechanism, mounted on a carrier of the second planetary gear mechanism, a cylindrical portion connected to an outer peripheral portion of the carrier of the second planetary gear mechanism at its inner peripheral portion, is formed integrally with a ring gear of a first planetary gear mechanism; a step portion for axially positioning the carrier of the second planetary gear mechanism, is formed on the cylindrical portion; a mounting portion of an outer periphery of the oil catch plate is held by the step portion and a side face portion of the carrier of the second planetary gear mechanism; and the carrier of the second planetary gear mechanism is fixed to the cylindrical portion.

Description

  The present invention relates to a compound planetary gear mechanism lubrication device, and more particularly to a compound planetary gear mechanism lubrication device in which an oil catch plate that collects oil scattered by centrifugal force and introduces it into an oil passage of a pinion shaft is attached to a carrier.

As a planetary gear mechanism used in a power transmission device such as a transmission, there is a compound planetary gear mechanism in which a first planetary gear mechanism and a second planetary gear mechanism are arranged on a rotation shaft. In the lubrication device of the compound planetary gear mechanism, in order to lubricate the pinion gear that is supported by the pinion shaft, an oil passage is formed in the pinion shaft to feed oil to the outer peripheral surface from the end, and the oil scattered by the centrifugal force is dispersed. An oil catch plate that is collected and introduced into the oil passage of the pinion shaft is attached to the carrier.
In a conventional compound planetary gear mechanism lubrication device, Japanese Patent Application Laid-Open No. 2000-145933 discloses that a mounting foot portion having elasticity is formed on the outer peripheral side of an oil catch plate, and that the mounting foot portion is elastic on the outer periphery of the carrier. A structure for attaching an oil catch plate to a carrier by fitting and fixing is disclosed.
Further, in a conventional compound planetary gear mechanism lubrication device, Japanese Patent Laid-Open No. 61-24857 discloses that a claw is provided on the outer periphery of an oil catch plate, and the claw is bent and fixed in a mounting hole formed on the outer peripheral portion of the carrier. Thus, a structure for attaching an oil catch plate to a carrier is disclosed.

JP 2000-145933 A Japanese Patent Laid-Open No. 61-24857

By the way, in the conventional compound planetary gear mechanism lubrication device, in order to introduce the lubricating oil without leakage, it is necessary to improve the adhesion between the carrier and the oil catch plate and to improve the sealing performance.
On the other hand, in the structure disclosed in Japanese Patent Application Laid-Open No. 2000-145933, it is necessary to form a mounting foot portion having elasticity, so that the productivity of the oil catch plate is poor, and the fixing method is an elastic pressure. Therefore, there is a concern of detachment due to external force. Further, in the structure disclosed in Japanese Patent Laid-Open No. 61-24857, the claw on the outer periphery of the oil catch plate is used as the mounting hole on the outer periphery of the carrier with the oil catch plate in contact with the side surface of the carrier. Since it is an operation of bending and fixing, the production process in assembly is complicated, and since fixing is performed by bending, there is a possibility that a gap may be formed between the carrier and the oil catch plate, and there is a problem that the sealing performance is inferior.
Further, in the conventional compound planetary gear mechanism lubrication device, since the oil catch plate is a rotating part, the force to remove the oil catch plate is acted on by the centrifugal force and the hydraulic pressure generated by the centrifugal force. There is concern about the catch plate coming off. In addition, the conventional compound planetary gear mechanism lubrication device has a structure in which a rubber seal is added to improve the sealing performance. However, the rubber seal increases the holding sliding resistance, increases the number of parts, and is troublesome to install the rubber seal. However, there is a problem that the oil catch plate comes off due to an external force such as centrifugal force.

  Accordingly, the present invention provides a lubricating device for a compound planetary gear mechanism in which oil is introduced into an oil passage of a pinion shaft by an oil catch plate, without causing an increase in sliding resistance and an increase in the number of parts, and the carrier and the oil catch plate. An object of the present invention is to simplify the structure of attaching an oil catch plate to a carrier while suppressing oil leakage from between and outside.

  According to the present invention, a first planetary gear mechanism and a second planetary gear mechanism each including a sun gear, a ring gear, and a pinion gear supported by a carrier via a pinion shaft are arranged on a rotation shaft, and the first planetary gear mechanism is provided. The ring gear of the gear mechanism and the carrier of the second planetary gear mechanism are connected to each other, and oil is taken into the pinion shaft of the second planetary gear mechanism from the end on the first planetary gear mechanism side, and the outer periphery of the pinion shaft In a lubricating device for a compound planetary gear mechanism, an oil catch plate that forms an oil passage to be sent to a surface, collects oil scattered by centrifugal force, and introduces it into the oil passage is attached to a carrier of the second planetary gear mechanism. A cylindrical portion in which the outer peripheral portion of the carrier of the second planetary gear mechanism is connected to the inner peripheral portion is formed integrally with the ring gear of the first planetary gear mechanism. A step portion for axially positioning the carrier of the second planetary gear mechanism is formed in the cylindrical portion, and the mounting portion on the outer periphery of the oil catch plate is formed with the step portion and a side surface portion of the carrier of the second planetary gear mechanism. And the carrier of the second planetary gear mechanism is fixed to the cylindrical portion.

In the present invention, since the gap between the carrier and the oil catch plate can be covered with the cylindrical portion integrally formed with the ring gear of the first planetary gear mechanism, oil leakage from between the carrier and the oil catch plate to the outside can be prevented. Can be prevented.
In the present invention, a step portion for positioning the carrier of the second planetary gear mechanism in the axial direction is formed in the cylindrical portion, and the mounting portion on the outer periphery of the oil catch plate is formed as a step portion and a side portion of the carrier of the second planetary gear mechanism. Since the carrier of the second planetary gear mechanism is fixed to the cylindrical portion, the structure for attaching the oil catch plate to the carrier can be simplified.
Therefore, this invention can simplify the attachment structure of the oil catch plate with respect to the carrier while suppressing oil leakage from between the carrier and the oil catch plate to the outside.

FIG. 1 is a cross-sectional view of a compound planetary gear mechanism. (Example) FIG. 2 is a front view of the oil catch plate. (Example) 3 is a cross-sectional view taken along line XX of FIG. (Example) 4A is a cross-sectional view before assembly of the oil catch plate, and FIG. 4B is a cross-sectional view after assembly of the oil catch plate. (Example) FIG. 5 is a perspective view of the first ring gear and the second carrier assembled with the oil catch plate. (Example) FIG. 6 is a front view of the first ring gear and the second carrier assembled with the oil catch plate. (Example)

  Embodiments of the present invention will be described below based on the drawings.

1 to 6 show an embodiment of the present invention. In FIG. 1, a compound planetary gear mechanism 1 used in a power transmission device such as a transmission has a first planetary gear mechanism 3 and a second planetary gear mechanism 4 arranged on a rotating shaft 2 rotated by a drive source. ing. The first planetary gear mechanism 3 and the second planetary gear mechanism 4 are disposed adjacent to each other in the axial direction, and connect two of the components to each other.
The first planetary gear mechanism 3 includes, as components, a first sun gear 5 disposed coaxially with the rotary shaft 2, a first planetary gear 8 supported by a first carrier 7 via a first pinion shaft 6, And a first ring gear 9 that meshes with one planetary gear 8. The first sun gear 5 is connected to a first auxiliary drive source. The first pinion shaft 6 is supported by the first auxiliary carrier 10 on one end side in the axial direction and the first carrier 7 on the other end side in the axial direction with the first planetary gear 8 interposed therebetween. A plurality of first pinion shafts 6 are provided, and are arranged at equidistant positions in the circumferential direction with respect to the first carrier 7 and the first auxiliary carrier 10. The first carrier 7 is fixed to the rotating shaft 2. An output gear 38 is disposed on the outer periphery of the first ring gear 9.
The second planetary gear mechanism 4 includes, as components, a second sun gear 11 disposed coaxially with the rotary shaft 2, a second planetary gear 14 supported by a second carrier 13 via a second pinion shaft 12, And a second ring gear 15 that meshes with the two planetary gears 14. The second sun gear 11 is fixed to the rotating shaft 2. The second pinion shaft 12 is supported on one end side in the axial direction by the second carrier 13 with the second planetary gear 14 interposed therebetween, and supported on the second auxiliary carrier 16 on the other end side in the axial direction. A plurality (four in the embodiment) of the second pinion shafts 12 are provided, and are arranged at circumferentially equidistant positions with respect to the second carrier 13 and the second auxiliary carrier 16. The second carrier 13 is connected to the first ring gear 9. The second ring gear 15 is connected to the second auxiliary drive source.

A first planetary gear mechanism 3 and a second planetary gear mechanism 4 are arranged on the rotating shaft 2, and the first ring gear 9 of the first planetary gear mechanism 3 and the second carrier 13 of the second planetary gear mechanism 4 are mutually connected. The compound planetary gear mechanism 1 connected to the second planetary gear mechanism 1 includes a lubrication device 17 that lubricates the second planetary gear 14 supported by the second carrier 13 via the second pinion shaft 12.
The lubrication device 17 of the compound planetary gear mechanism 1 includes an axial oil passage 18 extending in the axial direction inside the rotary shaft 2, one end side communicating with the axial oil passage 18, and the other end side being a first shaft of the rotary shaft 2. It comprises a radial oil passage 20 extending in the radial direction so as to open to the outer peripheral surface 19 between the carrier 7 and the second sun gear 11. From the radial oil passage 20, oil is sent out between the first planetary gear mechanism 3 and the second planetary gear mechanism 4.
An oil passage 21 is formed in the second pinion shaft 12 of the second planetary gear mechanism 4. The oil passage 21 includes an introduction passage portion 23 that opens at one end side in an axial end surface 22 of the second pinion shaft 12 and the other end side extends to the middle in the axial direction, and the other end side of the introduction passage portion 23. The lead-out passage portion 25 extends in the radial direction so as to communicate with one end side and open to the outer peripheral surface 24 of the second pinion shaft 12 at the other end side. The oil passage 21 of the second pinion shaft 12 takes oil sent from the axial oil passage 18 of the rotating shaft 2 into the introduction passage portion 23 from the end face 22 on one axial end side facing the first planetary gear mechanism 3. The second planetary gear 14 is lubricated by feeding from the lead-out passage portion 24 to the outer peripheral surface 24 of the second pinion shaft 12.

An oil catch plate 26 is attached to the second carrier 13 of the second planetary gear mechanism 4. The oil catch plate 26 collects the oil scattered from the radial oil passage 20 of the rotating shaft side oil passage 18 by the centrifugal force of the rotating rotating shaft 2 and introduces it into the oil passage 21.
As shown in FIGS. 2 and 3, the oil catch plate 26 is provided with a guide portion 28 on the inner peripheral side of an annular flat plate main body 27. The guide portion 28 is formed by bending the inner peripheral side of the plate body 27 so as to reduce the diameter into a tapered cylindrical shape from one axial direction to the other. The plate main body 27 on the outer peripheral side of the guide portion 28 is provided with a plurality of bulging portions 29 that bulge toward one side in the axial direction at equidistant positions in the circumferential direction. The number of the bulging portions 29 is the same as the number of the introduction passage portions 23 (four in the embodiment) so as to overlap the introduction passage portion 23 opened on the end face 22 on one end side in the axial direction of the second pinion shaft 12. . The oil catch plate 26 is provided with a plurality of attachment portions 30 on the outer periphery of the plate body 27. The attachment portion 30 is formed so as to partially protrude in the shape of an annular plate at a radially outer position of the bulging portion 29 and at a circumferentially equidistant position.
As shown in FIG. 4, a cylindrical portion 31 is integrally formed on the first ring gear 9 of the first planetary gear mechanism 3 on the axial end side. In the cylindrical portion 31, an inner periphery from the other axial end portion to the axial intermediate portion is recessed radially outward to form an inner peripheral portion 32. A stepped portion 33 that faces the second carrier 13 of the two planetary gear mechanism 4 is formed. The outer peripheral portion 34 of the second carrier 13 of the second planetary gear mechanism 4 is brought into contact with and connected to the inner peripheral portion 32 of the cylindrical portion 31. A side surface portion 35 on one side in the axial direction of the second carrier 13 is brought into contact with the stepped portion 33 of the cylindrical portion 31 via the mounting portion 30 of the oil catch plate 26 to position the second carrier 13 in the axial direction.

When the oil catch plate 26 is attached to the lubricating device 17 of the compound planetary gear mechanism 1, first, as shown in FIG. 4A, the cylindrical portion 31 of the first ring gear 9 and the second planetary gear mechanism 4 Between the carrier 13, the guide portion 28 and the bulging portion 29 are positioned closer to the cylindrical portion 31 than the plate body 27, and the bulging portion 29 is located on the end face 22 on one end side in the axial direction of the second pinion shaft 12. The oil catch plate 26 is disposed so as to overlap with the opening introduction passage portion 23.
Next, the second carrier 13 is inserted into the cylindrical portion 31, and the outer peripheral portion 34 of the second carrier 13 is engaged with the inner peripheral portion 32 of the cylindrical portion 31, as shown in FIG. The attachment portion 30 of the oil catch plate 26 is sandwiched between the step portion 33 of 31 and the side surface portion 35 of the second carrier 13. Thus, the second carrier 13 is positioned in the axial direction by bringing the side surface portion 35 on one side in the axial direction into contact with the stepped portion 33 of the cylindrical portion 31 via the mounting portion 30 of the oil catch plate 26.
The second carrier 13 having the mounting portion 30 of the oil catch plate 26 sandwiched between it and the cylindrical portion 31 is fixed to the cylindrical portion 31. In this embodiment, as shown in FIG. 1, the outer peripheral portion 34 of the second carrier 13 is fixed to the inner peripheral portion 32 of the cylindrical portion 31 by welding 36. The second carrier 13 and the cylindrical portion 31 can be fixed not only by the welding 36 but also by spline fitting. An oil catch plate 26 is assembled between the second carrier 13 and the cylindrical portion 31 of the first ring gear 9 fixed to each other as shown in FIGS. The oil catch plate 26 assembled to the cylindrical portion 31 of the first ring gear 9 and the second carrier 13 passes through the gap between the second carrier 13 and the oil catch plate 26 through the first ring gear of the first planetary gear mechanism 3. 9 is covered with a cylindrical portion 31 formed integrally with the body 9.
As shown in FIG. 1, the oil catch plate 26 assembled to the cylindrical portion 31 and the second carrier 13 includes a guide portion 28 and a bulging portion 29, a side surface portion 35 of the second carrier 13, and the second pinion shaft 12. An oil introduction portion 37 that is located away from the end surface 22 on one end side in the axial direction of the second pinion shaft 12 and extends toward the outer peripheral surface 19 of the rotary shaft 2 between the end surface 22 of the second pinion shaft 12 and the guide portion 28 and the bulging portion 29. Is defined.
The oil scattered from the radial oil passage 20 by the centrifugal force of the rotating rotating shaft 2 is collected by the oil introduction portion 37 of the oil catch plate 26 that spreads toward the outer peripheral surface 19 of the rotating shaft 2, and the second pinion shaft 12 It is introduced into an oil passage 21 that opens to the end face 22 on one end side in the axial direction. The oil introduced into the oil passage 21 is sent out to the outer peripheral surface 24 of the second pinion shaft 12 and lubricates the second planetary gear 14.

As described above, the lubrication device 17 of the compound planetary gear mechanism 1 covers the gap between the second carrier 13 and the oil catch plate 26 with the cylindrical portion 31 integrally formed with the first ring gear 9 of the first planetary gear mechanism 3. Therefore, oil leakage from between the second carrier 13 and the oil catch plate 26 to the outside can be prevented.
Further, the lubrication device 17 of the compound planetary gear mechanism 1 forms a stepped portion 33 for positioning the second carrier 13 of the second planetary gear mechanism 4 in the axial direction in the cylindrical portion 31, and the mounting portion 30 on the outer periphery of the oil catch plate 26. Is sandwiched between the step portion 33 and the side surface portion 35 of the second carrier 13, and the second carrier 13 is fixed to the cylindrical portion 31, so that the mounting structure of the oil catch plate 26 to the second carrier 13 can be simplified.
Therefore, the lubricating device 17 of the compound planetary gear mechanism 1 has a structure for attaching the oil catch plate 26 to the second carrier 13 while suppressing oil leakage from between the second carrier 13 and the oil catch plate 26 to the outside. It can be simplified. Further, since it is not a structure in which components such as a rubber seal are added in order to improve the sealing performance, the sliding resistance is not increased and the number of components is not increased.

  In the lubricating device of the compound planetary gear mechanism, the oil catch plate mounting structure with respect to the carrier can be simplified while suppressing oil leakage to the outside between the carrier and the oil catch plate. It can be applied to the planetary gear mechanism used.

DESCRIPTION OF SYMBOLS 1 Compound planetary gear mechanism 2 Rotating shaft 3 1st planetary gear mechanism 4 2nd planetary gear mechanism 5 1st sun gear 6 1st pinion shaft 7 1st carrier 8 1st planetary gear 9 1st ring gear 11 2nd sun gear 12 2nd pinion shaft 13 Second carrier 14 Second planetary gear 15 Second ring gear 17 Lubricating device 18 Axial oil passage 19 Outer peripheral surface 20 Radial direction oil passage 21 Oil passage 22 End surface 23 Introduction passage portion 24 Outer peripheral surface 25 Outlet passage portion 26 Oil catch plate 27 Plate Main body 28 Guide part 29 Swelling part 30 Mounting part 31 Cylindrical part 32 Inner peripheral part 33 Step part 34 Outer peripheral part 35 Side part 36 Welding 37 Oil introduction part

Claims (1)

  A first planetary gear mechanism and a second planetary gear mechanism, each comprising a sun gear, a ring gear, and a pinion gear supported by a carrier via a pinion shaft, are arranged on a rotating shaft, and the ring gear of the first planetary gear mechanism And the carrier of the second planetary gear mechanism are connected to each other, oil is taken into the pinion shaft of the second planetary gear mechanism from the end on the first planetary gear mechanism side and sent to the outer peripheral surface of the pinion shaft In the lubricating device for a complex planetary gear mechanism, wherein an oil catch plate that forms a passage and collects oil scattered by centrifugal force and introduces the oil into the oil passage is attached to a carrier of the second planetary gear mechanism, the second planetary gear A cylindrical portion where the outer peripheral portion of the carrier of the mechanism is connected to the inner peripheral portion is formed integrally with the ring gear of the first planetary gear mechanism, Forming a step portion for positioning the carrier of the second planetary gear mechanism in the axial direction, and sandwiching the mounting portion on the outer periphery of the oil catch plate between the step portion and the side surface portion of the carrier of the second planetary gear mechanism. A lubricating device for a compound planetary gear mechanism, wherein the carrier of the second planetary gear mechanism is fixed to the cylindrical portion.

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