JP5136402B2 - Lubricating structure of planetary gear mechanism - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lubricating structure of a planetary gearing mechanism capable of stably lubricating irrespective of the rotating state. <P>SOLUTION: As the lubricating structure of a power split planetary gear 21 which is the planetary gear mechanism, a lubricating oil passage 31 for feeding lubricating oil to a lubricated section is formed in a planetary shaft 30 to rotatably support a planetary gear 24. The planetary shaft 30 is connected to a planetary carrier 25 rotatably with an input shaft 16. The planetary carrier 25 is connected to a catch tank 70 having an outside oil containing section 81 and an inside oil containing section 82 capable of containing the lubricating oil according to the rotating state of the planetary carrier 25, and a projection 88 capable of switching the oil containing section for allowing the lubricating oil to the lubricating oil passage 31 between the outside oil containing section 81 and the inside oil containing section 82 according to the rotating state. Thereby, the lubricating oil can be made to flow to the lubricating oil passage 31 according to the rotating state of the planetary carrier 25 so as to enable stable lubrication irrespective of the rotating state. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a lubricating structure for a planetary gear mechanism. In particular, the present invention relates to a lubricating structure of a planetary gear mechanism used in a transmission of a hybrid vehicle in which an engine and a motor are used as power sources.

  A conventional transmission mounted on a vehicle includes a sun gear that is rotatably provided, a planetary gear that can revolve around the sun gear centering on the center of rotation of the sun gear and a planetary gear that rotates while meshing with the sun gear. A carrier that supports the planetary gear so that it can revolve around the sun gear, and a ring gear whose rotation center is the same rotation center as the rotation center of the sun gear and that can rotate around the planetary gear while meshing with the planetary gear Some planetary gear mechanisms having the following are used. This planetary gear mechanism can transmit the power from the engine, which is a power source, to the drive wheel side at a desired gear ratio by controlling the rotation of the sun gear, carrier, etc. using a clutch or a brake.

  Also, in such a planetary gear mechanism, lubricating oil is usually supplied by an oil pump that operates during operation of the vehicle, and operates while being lubricated by this lubricating oil. However, since the oil pump is stopped when the vehicle is towed, the lubricating oil is not supplied by the oil pump. In this case, the lubricating oil accumulated in the transmission is sprung up by the gear in the transmission that rotates with the rotation of the wheel when the vehicle is towed, so that the outer portion of the ring gear is lubricated. Although it is easy to supply oil, the splashed lubricating oil is difficult to reach the outer part of the ring gear, so it is difficult to supply it to the inner part of the ring gear. In this case, it is difficult to supply the lubricating oil to the planetary gear side, and the supply of the lubricating oil may be insufficient.

  For this reason, some conventional planetary gear mechanism lubrication structures supply lubricant more reliably even when the oil pump is stopped. For example, in the lubricating device for a vehicle transmission described in Patent Document 1, an oil reservoir that accumulates lubricating oil supplied from an inner diameter side to a sun gear, and oil in the oil reservoir by centrifugal force based on rotation of the sun gear is transmitted to a planetary gear. An oil passage leading to the lubricated part is formed. Thereby, even when the oil pump is stopped, if the sun gear is rotating, the oil in the oil reservoir is guided to the lubricated portion of the planetary gear through the oil passage formed in the sun gear by centrifugal force. Accordingly, the planetary gear can be lubricated even when the oil pump is stopped, such as when the vehicle is being towed.

  Further, in a vehicle transmission, since the lubricating oil accumulated in the transmission as described above is sprung up by the gear of the transmission when the vehicle is running, the conventional planetary gear mechanism lubrication structure There are some which are actively lubricated using the splashed lubricating oil. For example, in the lubrication structure of a planetary gear device described in Patent Document 2, an oil path capable of supplying lubricating oil is provided between a support pin and a planetary gear on a support pin serving as a rotation shaft of a planetary gear. The planetary carrier provided integrally is provided with an introduction oil passage capable of guiding the lubricating oil to the oil passage of the support pin.

  Further, the introduction oil passage is bent in an S-shape, and when the lubricating oil flowing from the inner diameter side to the outer diameter side flows into the introduction oil passage by centrifugal force when the planetary carrier rotates, it does not flow out to the outer diameter side. It is formed as follows. Furthermore, since this introduction oil path is bent in an S-shape, when the planetary carrier stops rotating, it is sprung up by another gear in the transmission, and the lubricating oil is introduced from the upper side to the lower side by gravity. It is formed so as not to flow downward when it flows into the oil passage. Accordingly, the lubricating oil can be guided from the introduction oil passage to the oil passage of the support pin regardless of the rotation state of the planetary carrier, and the support pin and the planetary gear can be lubricated.

JP 2004-211801 A JP 2004-270736 A

  Here, in the planetary gear mechanism, lubricating oil is supplied from an oil pump into a rotary shaft that is rotatably provided integrally with a carrier that rotatably supports the planetary gear, and the rotary shaft rotates. Some are provided so that the lubricating oil supplied from the oil pump can be supplied to the planetary gear by the centrifugal force. In the case of such a planetary gear mechanism, even if an oil reservoir or an oil passage is provided in the sun gear as in the lubricating device for a vehicle transmission described in Patent Document 1, the lubricating oil supplied by the oil pump flows into the sun gear. Therefore, when the rotating shaft stops, centrifugal force does not act on the lubricating oil, and the lubricating oil is difficult to be supplied in the direction of the planetary gear.

  Further, even in the planetary gear mechanism in which the lubricating oil is supplied from the oil pump into the rotating shaft, the lubricating oil is supplied in the direction of the planetary gear by the centrifugal force when the rotating shaft rotates, and the transmission device even when the rotation stops. Lubricating oil is supplied to the planetary gear mechanism by the lubricating oil splashed up by other gears. However, unlike the case where these lubricating oils are supplied by an oil pump, the amount supplied by centrifugal force or the amount of splashed oil depending on the rotational speed of the rotating shaft, the state of the lubricating oil in the transmission, etc. The direction of the lubricating oil scattered by centrifugal force and splashing changes every moment.

  For this reason, as in the planetary gear device lubrication structure described in Patent Document 2, the introduction oil passage is provided in the planetary carrier, and the lubricating oil scattered around by the centrifugal force during the rotation of the rotating shaft to which the oil is supplied When the lubricating oil splashed up by the gear in the transmission is received by the introduction oil passage, further contrivance is required to stabilize the amount received by the introduction oil passage.

  The present invention has been made in view of the above, and an object of the present invention is to provide a planetary gear mechanism lubrication structure capable of performing stable lubrication regardless of the rotational state.

  In order to solve the above-mentioned problems and achieve the object, a lubricating structure of a planetary gear mechanism according to the present invention is connected to a rotating part provided to be rotatable about a rotation center axis, and to the rotating part, and A lubricating member provided integrally with the rotating portion and rotatably provided with a lubricating oil passage for supplying lubricating oil to the lubricating portion; and connected to the rotating portion and integrally with the rotating portion. The first oil storage section and the second oil storage section that are provided so as to be rotatable and can store the lubricating oil that has entered from the opening through which the lubricating oil can enter according to the rotation state of the rotating section. An oil storage part is provided, and the lubricating oil stored in the first oil storage part or the second oil storage part can flow into the lubricating oil path, and can be moved in the radial direction around the rotation center axis. Provided in the lubricating oil Characterized in that it and a catch tank with switchable switching unit in the oil storage portion to flow into the lubricating oil passage and the first oil storage portion and the second oil storage portion.

  In the present invention, the first oil storage part and the second oil storage part are provided with the oil storage parts that store the lubricating oil in the first oil storage part or the second oil storage part according to the rotation state of the rotary part, and flow the lubricating oil into the lubricating oil path by the switching part. By switching between and, the lubricating oil accumulated in the first oil storage part or the second oil storage part can be caused to flow in the lubricating oil passage according to the rotation state of the rotating part. Thereby, lubricating oil can be supplied to a lubrication part irrespective of the rotation state of a rotation part. As a result, stable lubrication can be performed regardless of the rotation state.

  In the planetary gear mechanism lubrication structure according to the present invention, in the planetary gear mechanism lubrication structure, the switching unit enters the lubricating oil passage and moves in the radial direction in accordance with the rotational state of the rotating unit. By doing so, the oil storage part which flows the lubricating oil through the lubricating oil path is switched between the first oil storage part and the second oil storage part.

  In this invention, the switching unit enters the lubricating oil passage and moves in the radial direction according to the rotation state of the rotating portion, so that the flow of the lubricating oil to the lubricating oil passage can be switched to a desired state more reliably. Therefore, it is possible to switch the oil storage part that flows the lubricating oil to the lubricating oil path so as to flow more reliably from the desired oil storage part of the first oil storage part and the second oil storage part. As a result, it is possible to perform the lubrication more stably regardless of the rotation state.

  Further, the planetary gear mechanism lubrication structure according to the present invention is the above planetary gear mechanism lubrication structure, further provided at the boundary between the first oil storage part and the second oil storage part and integrated with the switching part. And having a boundary portion movable in the radial direction.

  In this invention, the switching portion is formed integrally with the boundary portion provided at the boundary between the first oil storage portion and the second oil storage portion, and is provided so as to be movable in the radial direction integrally with the boundary portion. When the oil storage part which flows lubricating oil to a lubricating oil path is switched by moving a switching part, it can switch more reliably. As a result, it is possible to perform the lubrication more stably regardless of the rotation state.

  The planetary gear mechanism lubrication structure according to the present invention is characterized in that, in the planetary gear mechanism lubrication structure, the opening includes a first opening into which the lubricant stored in the first oil storage part enters, and the second oil storage. And a second opening into which the lubricating oil accumulated at the portion enters.

  In this invention, since the 1st opening part and the 2nd opening part are provided, according to the rotation state of a rotation part, lubricating oil can be entrapped in the oil storage part suitable for a rotation state. As a result, the lubricating oil can be more reliably stored in the oil storage section suitable for the rotation state, and the lubricating oil is lubricated by flowing the lubricating oil from the first oil storage section or the second oil storage section in which the lubricating oil is stored into the lubricating oil passage. Oil can be supplied. As a result, it is possible to perform the lubrication more stably regardless of the rotation state.

  The lubrication structure of the planetary gear mechanism according to the present invention has an effect that the lubrication can be stably performed regardless of the rotation state.

  Embodiments of a lubricating structure for a planetary gear mechanism according to the present invention will be described below 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 replaced by those skilled in the art or those that are substantially the same.

  FIG. 1 is a schematic diagram of a vehicle including a planetary gear mechanism lubrication structure according to an embodiment. In the following description, the radial direction is the center of rotation that is the axis that is the center when the input shaft 16 of the drive device 15 described below rotates, unless a reference axis or the like is specifically described. The direction orthogonal to the axis 65 is referred to, and the circumferential direction similarly refers to the circumferential direction around the rotation center axis 65. A vehicle 1 shown in the figure includes an engine 3 that is an internal combustion engine and a motor generator 5 that is driven by electricity. The vehicle 1 is a so-called hybrid vehicle in which the engine 3 and the motor generator 5 are used together or selected and used as a power source during traveling. Among these, the motor generator 5 constitutes the drive device 15 together with the power split and integration mechanism 20, the speed reduction mechanism 50, and the differential device 55, and the vehicle 1 connects the engine 3 and the motor generator 5 to the vehicle 1. The vehicle travels by cooperative control by an ECU (Electronic Control Unit) 10 that controls each part.

  The motor generator 5 has a function as an electric motor that converts supplied electric power into mechanical power and a function as a generator that converts input mechanical power into electric power. The first motor generator Two motor generators 5, 6 and a second motor generator 8 are provided. Among these, the 1st motor generator 6 is mainly used as a generator, and the 2nd motor generator 8 is mainly used as an electric motor.

  Further, the drive device 15 has a power for dividing the mechanical power output from the engine 3 as a power transmission mechanism when the mechanical power output from the engine 3 and the motor generator 5 is transmitted to the drive wheels 62 of the vehicle 1. The division / integration mechanism 20, the reduction mechanism 50 that decelerates the rotation transmitted from the power division / integration mechanism 20 and increases the torque, and the mechanical power transmitted from the reduction mechanism 50 is distributed to the left and right drive wheels 62 and output. A differential device 55 is provided.

  Among these, the power split and integration mechanism 20 is constituted by two single pinion planetary gear mechanisms. Specifically, the power split and integration mechanism 20 is a power split planetary gear that can split mechanical power output from the engine 3 into mechanical power that drives the first motor generator 6 and mechanical power that drives the speed reduction mechanism 50. 21 and a reduction planetary gear 41 capable of transmitting the mechanical power output from the second motor generator 8 to the reduction mechanism 50 by reducing the rotational speed and increasing the torque.

  Of the power split planetary gear 21 and the reduction planetary gear 41, the power split planetary gear 21 includes a sun gear 22 and a ring gear 23 arranged coaxially with each other, and a plurality of planetary gears interposed between these gears. 24 and a planetary carrier 25 that supports the planetary gear 24 so as to be capable of rotating and revolving around the rotation center shaft 65. Similarly, the reduction planetary gear 41 includes a sun gear 42 and a ring gear 43 that are arranged coaxially with each other, a plurality of planetary gears 44 interposed between these gears, and a planetary carrier that supports the planetary gear 44 so as to be capable of rotating. 45.

  The power split planetary gear 21 and the reduction planetary gear 41 provided in this way are arranged concentrically, and the ring gear 23 of the power split planetary gear 21 and the ring gear 43 of the reduction planetary gear 41 are integrally coupled. . A counter drive gear 48 that drives a counter shaft 53 of the speed reduction mechanism 50 is provided on the outer peripheral side of the integrally coupled ring gears 23 and 43.

  The input shaft 16 of the drive device 15 provided as a rotation shaft when the output of the engine 3 is input to the drive device 15 is connected to the planetary carrier 25 of the power split planetary gear 21 so as to be integrally rotatable. As a result, the power split planetary gear 21 can divide the output of the engine 3 into mechanical power transmitted from the planetary gear 24 supported by the planetary carrier 25 to the sun gear 22 and mechanical power transmitted to the ring gear 23. It has become.

  The first motor generator 6 is connected to the power split and integration mechanism 20, the drive shaft 7 of the first motor generator 6 is formed in a hollow shape coaxial with the input shaft 16 of the drive device 15, and the power The split planetary gear 21 is connected to the sun gear 22 so as to be integrally rotatable. Accordingly, the mechanical power input from the engine 3 to the power split planetary gear 21 can be transmitted to the first motor generator 6 via the planetary carrier 25, the planetary gear 24, and the sun gear 22, and the first motor generator 6 can be generated by the mechanical power transmitted from the engine 3.

  On the other hand, the planetary carrier 45 of the reduction planetary gear 41 is fixed to the housing of the drive device 15, and the sun gear 42 of the reduction planetary gear 41 is coupled to the drive shaft 9 of the second motor generator 8. Further, since the sun gear 42 is provided so that rotation can be transmitted to the ring gear 43 via the planetary gear 44 supported by the planetary carrier 45, the reduction planetary gear 41 is provided with mechanical power output from the second motor generator 8. Can be transmitted to the ring gear 43 via the sun gear 42 and the planetary gear 44. At this time, the reduction planetary gear 41 can reduce the rotational speed of the mechanical power output from the second motor generator 8, increase the torque, and transmit it to the ring gear 43.

  Since this ring gear 43 is integrally coupled with the ring gear 23 of the power split planetary gear 21, the power split integration mechanism 20 is a machine that is transmitted from the second motor generator 8 to the ring gear 43 of the reduction planetary gear 41. The mechanical power transmitted from the engine 3 to the ring gear 23 of the power split planetary gear 21 can be integrated and transmitted from the counter drive gear 48 to the speed reduction mechanism 50.

  Further, the speed reduction mechanism 50 is coupled to the counter driven gear 51 that meshes with the counter drive gear 48 of the power split and integration mechanism 20, the counter shaft 53 coupled to the counter driven gear 51, and the counter shaft 53. And a final drive gear 54 that meshes with a ring gear 56 of Therefore, the speed reduction mechanism 50 can transmit the mechanical power transmitted from the ring gears 23 and 43 of the power split and integration mechanism 20 to the ring gear 56 of the differential device 55 by reducing the rotational speed and increasing the torque. It has become.

  The differential device 55 includes a ring gear 56 and a differential case 57 that is fixed to the ring gear 56 and rotates integrally. Also, in the differential case 57, a pair of left and right side gears 58 respectively coupled to the left and right drive shafts 61 of the vehicle 1 and two differential pinions 59 that engage with the two side gears 58 at right angles are provided. It has been. Further, the left and right drive shafts 61 are respectively coupled to the side gears 58, and the drive shafts 61 are coupled to the left and right drive wheels 62 of the vehicle 1, respectively.

  FIG. 2 is a detailed view of the power split planetary gear shown in FIG. On the input shaft 16 to which the planetary carrier 25 included in the power split planetary gear 21 is connected, an input shaft oil path 17 is formed which is an oil path through which lubricating oil that lubricates each part of the drive device 15 such as the power split planetary gear 21 is formed. Has been. The input shaft oil passage 17 is formed along the axial direction of the input shaft 16. Furthermore, a plurality of radial oil passages 18 communicating with the input shaft oil passage 17 are formed in the input shaft 16. The radial oil passage 18 is formed in the radial direction of the input shaft 16, one end communicating with the input shaft oil passage 17, and the other end opening on the outer peripheral surface of the input shaft 16. That is, the radial oil passage 18 communicates the input shaft oil passage 17 and the outside of the input shaft 16. Further, the input shaft oil passage 17 is provided so as to be able to supply lubricating oil directly or indirectly by being pumped by an oil pump (not shown).

  The planetary carrier 25 included in the power split planetary gear 21 supports the planetary gear 24 so as to be capable of rotating and revolving. Specifically, the planetary carrier 25 is connected to the input shaft 16. When the input shaft 16 is rotated, the input shaft 16 can be rotated together with the input shaft 16 about a rotation center shaft 65 that is a shaft that becomes a center when the input shaft 16 rotates. In other words, the planetary carrier 25 is provided as a rotating part provided to be rotatable around the rotation center shaft 65. The planetary carrier 25 provided in this way is provided on both sides of the planetary gear 24 in the axial direction when the planetary gear 24 rotates and revolves, and the planetary carriers 25 located on both sides of the planetary gear 24 are The planetary carrier 25 is connected by a connecting portion 26. The connecting portions 26 are provided at a plurality of locations in the circumferential direction around the rotation center shaft 65.

  The planetary carrier 25 provided in this way supports a planetary shaft 30 that supports the planetary gear 24 so as to be capable of rotating. This planetary shaft 30 is formed in a round bar shape, and both ends in the axial direction of the round bar shaft are connected by being caulked to planetary carriers 25 provided on both sides of the planetary gear 24. Thereby, the planetary shaft 30 is provided so as to be rotatable integrally with the planetary carrier 25 when the planetary carrier 25 rotates. In other words, the planetary shaft 30 can revolve around the rotation center shaft 65 by rotating integrally with the planetary carrier 25 when the planetary carrier 25 rotates.

  The planetary gear 24 is formed with a hole larger than the diameter of the planetary shaft 30, and the planetary shaft 30 supports the planetary gear 24 while passing through the hole of the planetary gear 24. At this time, a needle bearing 35 is provided between the planetary shaft 30 and the planetary gear 24. The needle bearing 35 has a plurality of needles 36 that are shorter than half the width of the planetary gear 24 and that are oriented in the same direction as the planetary shaft 30 in two rows. Spacers 37 formed in a ring shape are provided between the rows of the needles 36 arranged in two rows in this way. The combined length of the spacer 37 and the two rows of needles 36 of the needle bearing 35 is approximately the same as the width of the planetary gear 24. In addition, washers 38 are disposed on both ends of the needle bearing 35 or on both sides of the planetary gear 24.

  The needle bearing 35 is provided between the planetary gear 24 and the planetary shaft 30 as described above. However, when the planetary gear 24 rotates, the planetary gear 24 is relative to the planetary shaft 30. Rotate. For this reason, a portion between the planetary gear 24 and the planetary shaft 30 provided with the needle bearing 35 is a lubrication portion that supplies and lubricates the lubricating oil when the planetary gear 24 rotates.

  Further, the planetary shaft 30 is formed with a lubricating oil passage 31 capable of supplying lubricating oil to a lubricating portion between the planetary shaft 30 and the planetary gear 24. Specifically, the lubricating oil passage 31 is a planetary shaft. Lubricating oil can be supplied to a needle bearing 35 provided between 30 and the planetary gear 24. Thus, the planetary shaft 30 is provided as a lubricating member in which the lubricating oil passage 31 for supplying lubricating oil to the lubricating portion is formed.

  The lubricating oil passage 31 formed in the planetary shaft 30 includes an introduction oil passage 32 through which the lubricating oil is introduced and a supply oil passage 33 that supplies the lubricating oil to the needle bearing 35. Among these, the introduction oil passage 32 is formed along the axial direction of the planetary shaft 30, and one end opens at one end of both ends of the planetary shaft 30, and the other end is the other end of the planetary shaft 30. It is located in the planetary shaft 30 without opening at the end. That is, the introduction oil passage 32 is formed in the planetary shaft 30 as a hole having a predetermined depth, and the depth is deeper than ½ of the length of the planetary shaft 30. Further, the end portion of the planetary shaft 30 where the introduction oil passage 32 is open is the end portion closer to the radial oil passage 18 formed in the input shaft 16 among the both end portions of the planetary shaft 30. In the radial direction of the input shaft 16, the radial oil passage 18 is located in the vicinity of the inner end of the planetary shaft 30 on the side where the introduction oil passage 32 is open.

  The supply oil passage 33 is formed as a hole orthogonal to the axial direction of the planetary shaft 30. The supply oil passage 33 passes through the planetary shaft 30 and opens to the outer peripheral surface of the planetary shaft 30, and also passes through the introduction oil passage 32 formed in the planetary shaft 30. In other words, the supply oil passage 33 communicates with the introduction oil passage 32 and plays a role of communicating the introduction oil passage 32 and the outside of the planetary shaft 30. The supply oil passage 33 formed in this way is formed near the center in the length direction of the planetary shaft 30 and opens near the spacer 37 of the needle bearing 35 located between the planetary shaft 30 and the planetary gear 24. doing. In addition, it is preferable that the formation direction of the supply oil passage 33 penetrating the planetary shaft 30 is a direction along the radial direction of the input shaft 16 and penetrates in this direction.

  The planetary carrier 25 of the power split planetary gear 21 is connected to the end of the planetary shaft 30 on the side of the planetary carrier 25 formed on both sides of the planetary gear 24 where the introduction oil passage 32 is open. A catch tank 70 capable of storing lubricating oil is connected to the planetary carrier 25 on the other side. The catch tank 70 includes a case portion 71 that is an outer wall portion of the catch tank 70 and a slide plate 85 that is slidably disposed in the case portion 71.

  FIG. 3 is an AA arrow view of FIG. The catch tanks 70 connected to the planetary carrier 25 are arranged in the planetary carrier 25 in the vicinity of the position where the planetary shaft 30 is provided, and the same number as the number of the planetary gears 24 is provided. That is, since the power split planetary gear 21 that is a planetary gear mechanism having a planetary gear mechanism lubrication structure according to the embodiment is provided with three planetary gears 24, three catch tanks 70 are also provided. The catch tank 70 thus provided is provided so as to be rotatable integrally with the planetary carrier 25.

  FIG. 4 is a BB arrow view of FIG. FIG. 5 is a perspective view of a case portion of the catch tank shown in FIG. 6 is a perspective view of a slide plate included in the catch tank shown in FIG. The case portion 71 of the catch tank 70 is formed in a substantially U-shape when viewed in the radial direction around the rotation center shaft 65, and is formed with a predetermined height in the radial direction. ing. That is, the case portion 71 is formed by connecting the other two plates one by one to two opposing sides of one plate among the three plates formed in a substantially rectangular shape. Accordingly, the case portion 71 includes a side wall portion 73 that is a portion facing each other in the U-shaped shape, and a front wall portion 72 that is a portion connecting the facing side wall portions 73 to each other. have. The case portion 71 may be formed by connecting a plurality of plates used as the side wall portion 73 and the front wall portion 72, or may be formed by bending one plate or by integral molding.

  Further, the case portion 71 has a guide portion 75 formed in a shape protruding from the side wall portion 73 at an inner portion of the side wall portion 73, that is, a portion of the side wall portion 73 facing the other side wall portion 73. Is provided. The guide portion 75 protrudes in the direction toward the other side wall portion 73, and has a radial direction around the rotation center shaft 65, that is, the height in the same direction of the side wall portion 73 in the height direction of the catch tank 70. It is formed with the same length. That is, the guide portion 75 is formed from the outer end portion of the side wall portion 73 in the radial direction around the rotation center shaft 65 to the inner end portion. The guide portion 75 formed in this way is formed by arranging two guide portions 75 side by side in parallel on one side wall portion 73, and is provided on both of the two side wall portions 73. In this way, two guide portions 75 provided on each side wall portion 73 are formed at positions facing the guide portions 75 formed on the other side wall portion 73.

  The slide plate 85 is disposed inside the case portion 71 formed in such a U-shape, and the slide plate 85 is formed by integrating the boundary portion 86 and the projection portion 88. Has been. Among these, the boundary part 86 follows the shape of the inside of the case part 71, that is, the surface of the two side wall parts 73 facing the other side wall part 73 and the surface of the front wall part 72 on the side wall part 73 side. It is formed in a plate shape. For this reason, a notch 87 is formed in the boundary 86 at a position corresponding to the guide 75 formed in the side wall 73. The notch 87 is formed by being cut out in a shape slightly larger than the guide 75, and is provided so that the guide 75 can enter. Further, the gap between the boundary portion 86 and the inside of the case portion 71 in a state where the boundary portion 86 is disposed inside the case portion 71 is minimal.

  Further, the protrusion 88 has the front wall portion 72 located on the opposite side of the case portion 71 from the side where the front wall portion 72 is provided when the slide plate 85 is disposed inside the case portion 71. It protrudes from the boundary part 86 in the opposite direction of the direction. The protrusion 88 is formed in the vicinity of the center in the width direction of the slide plate 85, that is, in the vicinity of the middle portion of the distance between the two side wall portions 73, and the width thereof is the introduced oil formed in the planetary shaft 30. A width narrower than the diameter of the path 32 is formed.

  The catch tank 70 formed in this manner has an end portion on the opposite side of the case portion 71 on the side where the front wall portion 72 is located, that is, on the opposite side of the end portion on the side of the front wall portion 72 in the side wall portion 73. The catch tank 70 is connected to the planetary carrier 25 by connecting the connection portion 74, which is an end portion, in the vicinity of the portion of the planetary carrier 25 where the planetary shaft 30 is provided. The direction in which the guide 75 is formed is connected so that the direction in which the guide 75 is formed is generally along the radial direction about the rotation center axis 65.

  Further, since the case portion 71 is formed in a U-shape, when the connection portion 74 of the side wall portion 73 is connected to the planetary carrier 25, the case portion 71 is separated from the inner portion of the case portion 71. A predetermined space is formed with the planetary carrier 25. Therefore, both end portions of the case portion 71 in the radial direction around the rotation center shaft 65 are formed as openings 76 in the space inside the case portion 71 with respect to the outside of the case portion 71. The opening 76 is provided so that the lubricating oil can enter the catch tank 70. As described above, among the openings 76 located at both ends of the case portion 71, the openings 76 located outside in the radial direction around the rotation center shaft 65 serve as the outside openings 77, and are located on the inside in the radial direction. The opening 76 positioned is an inner opening 78.

  Further, the catch tank 70 is connected to the planetary shaft 30 in the vicinity of the end portion on the side where the introduction oil passage 32 is open, so that the introduction oil passage of the lubricating oil passage 31 formed in the planetary shaft 30. 32 is open to the catch tank 70. That is, the introduction oil passage 32 is open to the inside of the case portion 71 of the catch tank 70 connected to the planetary carrier 25.

  Further, the slide plate 85 included in the catch tank 70 is disposed inside the case portion 71 with the guide portion 75 of the case portion 71 entering the notch portion 87, so that the slide plate 85 extends along the guide portion 75. The guide portion 75 is formed so as to be movable in the direction along the radial direction around the rotation center axis 65. Further, the slide plate 85 has a protrusion 88 that protrudes in a direction opposite to the direction in which the front wall portion 72 of the case portion 71 is located. However, the slide plate 85 is located inside the state connected to the planetary carrier 25. In the case of being disposed, the projecting portion 88 is in a state of entering into the introduction oil passage 32 of the lubricating oil passage 31 that is open to the inside of the case portion 71. For this reason, the slide plate 85 is provided so as to be movable along the guide portion 75 of the case portion 71 within a range in which the protrusion 88 entering the introduction oil passage 32 can move within the introduction oil passage 32. The projecting portion 88 is provided so as to be movable in the radial direction around the rotation center shaft 65 in the introduction oil passage 32.

  In the catch tank 70, a predetermined space is formed by the case portion 71 and the planetary carrier 25 by connecting the case portion 71 to the planetary carrier 25, and a slide plate 85 is disposed inside the case portion 71. As a result, the space inside the case portion 71 is partitioned on both sides of the boundary portion 86 of the slide plate 85. That is, the space in the catch tank 70 is divided into an outer side and an inner side in the radial direction centered on the rotation center shaft 65 by the boundary portion 86, and among these, the space is located outward in the radial direction. The portion is an outer oil storage portion 81 that is a first oil storage portion, and the portion located inward in the radial direction is an inner oil storage portion 82 that is a second oil storage portion. In other words, the boundary portion 86 is provided at the boundary between the outer oil storage portion 81 and the inner oil storage portion 82 and is formed so as to be movable in the radial direction integrally with the protrusion 88.

  Since the catch tank 70 has the slide plate 85 in which the projections 88 are formed in this way, the lubricating oil that has entered from the opening 76 depends on the rotation state of the planetary carrier 25 and the outer oil storage part 81 and the inner oil storage part 81. The oil storage section 82 is provided so that it can be stored. Of the outer opening 77 and the inner opening 78, the outer opening 77 is provided as the opening 76 of the outer oil storage part 81, and serves as a first opening into which lubricating oil stored in the outer oil storage part 81 enters. The inner opening 78 is provided as the opening 76 of the inner oil reservoir 82, and serves as a second opening into which lubricating oil accumulated in the inner oil reservoir 82 enters.

  In addition, the catch tank 70 is connected to the lubricating oil passage 31 because the introduction oil passage 32 of the lubricating oil passage 31 is open to the inside of the catch tank 70. For this reason, the catch tank 70 can flow the lubricating oil accumulated in the outer oil storage portion 81 and the inner oil storage portion 82 to the lubricating oil passage 31.

  The lubrication structure of the planetary gear mechanism according to this embodiment is configured as described above, and the operation thereof will be described below. When the vehicle 1 travels, the vehicle 3 travels by generating power by driving the engine 3 and the motor generator 5 that are power sources. Of these, the power generated by the engine 3 is input to the input shaft 16 and the input shaft 16 rotates. Since the input shaft 16 is connected to the planetary carrier 25 of the power split planetary gear 21, when the input shaft 16 rotates, the planetary carrier 25 also rotates together with the input shaft 16. When the planetary carrier 25 rotates in this way, the rotation is transmitted to the ring gear 23 via the planetary gear 24 supported by the planetary carrier 25, and the speed reduction mechanism 50 from the counter drive gear 48 provided on the outer peripheral side of the ring gear 23. Is transmitted to. The rotation transmitted to the speed reduction mechanism 50 is transmitted to the differential device 55 after the rotational speed is reduced by the speed reduction mechanism 50 to increase the torque. The rotation transmitted to the differential device 55 is distributed to the left and right drive shafts 61, transmitted to the drive shaft 61, and transmitted from the drive shaft 61 to the drive wheels 62. Thereby, the vehicle 1 travels.

  The power generated by the engine 3 is transmitted from the planetary gear 24 to the sun gear 22 when the planetary gear 24 of the power split planetary gear 21 rotates or revolves around the rotation center shaft 65, and is transmitted from the sun gear 22 to the first gear. By being transmitted to the drive shaft 7 of the motor generator 6, transmission to the first motor generator 6 is possible. Thus, the first motor generator 6 to which the power generated in the engine 3 is transmitted generates electricity for driving the second motor generator 8 by this power, or is a battery (not shown) mounted on the vehicle 1. To generate electricity to charge.

  Further, when the vehicle 1 is decelerated, the power of the drive wheels 62 accompanying the inertia of the vehicle 1 is transmitted from the differential device 55 to the speed reduction mechanism 50, and is transmitted from the speed reduction mechanism 50 to the ring gear 23 of the power split planetary gear 21. The power transmitted to the ring gear 23 is transmitted to the sun gear 22 via the planetary gear 24 of the power split planetary gear 21 and can be transmitted from the sun gear 22 to the first motor generator 6. Thereby, electric power can be generated by the first motor generator 6, and regenerative braking, which is braking performed while generating electric power by the inertial force during deceleration of the vehicle 1, can be performed.

  The power generated by the second motor generator 8 is transmitted from the drive shaft 9 of the second motor generator 8 to the sun gear 42 of the reduction planetary gear 41, and the sun gear 42 rotates. The rotation of the sun gear 42 is transmitted to the ring gear 43 via the planetary gear 44 of the reduction planetary gear 41, and is transmitted to the reduction mechanism 50 from the counter drive gear 48 provided on the outer peripheral side of the ring gear 43. As a result, as in the case where the power of the engine 3 is transmitted to the speed reduction mechanism 50 via the power split planetary gear 21, power is transmitted from the speed reduction mechanism 50 to the drive shaft 61 via the differential device 55, and further to the drive wheels. By being transmitted to 62, the vehicle 1 travels.

  As described above, both the power generated by the engine 3 and the power generated by the second motor generator 8 can be transmitted to the drive wheels 62, and the power generated by the engine 3 and the vehicle 1 are traveling. This inertia force is transmitted to the first motor generator 6 so that the first motor generator 6 can generate power.

  As described above, when the vehicle 1 travels, the vehicle 1 can travel by generating power by the engine 3 or the second motor generator 8 or by generating power by the first motor generator 6. When the vehicle travels, the engine 3 and the motor generator 5 perform coordinated control by the ECU 10. For this reason, the engine 3 is not always driven when the vehicle 1 travels, but is driven or stopped as necessary. Thereby, the input shaft 16 of the drive device 15 rotates or stops while the vehicle 1 is traveling.

  FIG. 7 is an explanatory diagram showing a state when the planetary carrier is rotating. Here, the lubrication of the power split planetary gear 21 constituted by the planetary gear mechanism will be described. Lubrication of the power split planetary gear 21, specifically, lubrication of the rotating portion of the planetary gear 24 included in the power split planetary gear 21 is different depending on whether the input shaft 16 is rotating or stopped. First, the case where the input shaft 16 is rotated by the operation of the engine 3 will be described. Since the oil pump for supplying the lubricating oil to the input shaft oil passage 17 of the input shaft 16 also operates during the operation of the engine 3, Lubricating oil is supplied into the input shaft oil passage 17. The lubricating oil supplied into the input shaft oil passage 17 also flows through the radial oil passage 18 communicating with the input shaft oil passage 17. Since the radial oil passage 18 is formed in the radial direction of the input shaft 16, the lubricating oil that has flowed through the radial oil passage 18 is released to the outside of the input shaft 16 due to the centrifugal force generated by the rotation of the input shaft 16. Then, it goes outward in the radial direction as it is (arrow F in FIGS. 3 and 7).

  The lubricating oil discharged from the radial oil passage 18 is thus directed outward in the radial direction of the input shaft 16, and in this direction, the catch tank 70 connected to the planetary carrier 25 of the power split planetary gear 21 is used. Is located. Further, the catch tank 70 is formed with an inner opening 78 that opens inward in the radial direction at a position on the inner side in the radial direction around the rotation center shaft 65. For this reason, when the lubricating oil going outward in the radial direction reaches the position where the catch tank 70 is provided, the lubricating oil enters the inside of the catch tank 70 from the inner opening 78. Specifically, the lubricating oil that has entered the inside of the catch tank 70 from the inner opening 78 is located on the inner side in the radial direction centering on the rotation center shaft 65 with respect to the boundary 86 that the slide plate 85 has. Enter 82.

  Further, the catch tank 70 into which the lubricating oil enters from the inner opening 78 during the rotation of the input shaft 16 is connected to the planetary carrier 25 that rotates together with the input shaft 16. Therefore, when the input shaft 16 rotates, the planetary carrier 25 connected to the input shaft 16 also rotates, and the catch tank 70 revolves around the rotation center shaft 65 along with this rotation. Is provided with a slide plate 85 that is movable in a direction along the guide portion 75 of the case portion 71, that is, in a radial direction about the rotation center axis 65. Therefore, when the catch tank 70 revolves around the rotation center shaft 65 and a centrifugal force acts on the catch tank 70, the slide plate 85 moves outward in the radial direction around the rotation center shaft 65. Moving.

  Further, when the lubricating oil enters the inner oil storage portion 82, the centrifugal force during the revolution of the catch tank 70 also acts on the lubricating oil, so that the lubricating oil is outside in the radial direction around the rotation center shaft 65. Move towards. Since the boundary portion 86 of the slide plate 85 is located outside the inner oil storage portion 82 in the radial direction, and the gap between the boundary portion 86 and the inside of the case portion 71 is minimal, The lubricating oil that moves outward does not flow outward in the radial direction from the boundary portion 86. As a result, the lubricating oil that has entered the inner oil reservoir 82 is accumulated in the inner oil reservoir 82 by centrifugal force.

  Further, when the lubricating oil is accumulated in the inner oil storage portion 82 as described above, the centrifugal force during the revolution of the catch tank 70 also acts on the lubricating oil in the inner oil storage portion 82, but the centrifugal force acts on the lubricating oil. In this case, the lubricating oil applies a force in the radially outward direction to the boundary 86 located outside the inner oil storage portion 82 in the radial direction. Thus, the slide plate 85 moves outward in the radial direction around the rotation center shaft 65 also by a force applied from the lubricating oil when a centrifugal force acts on the lubricating oil.

  When the catch tank 70 revolves with the rotation of the input shaft 16, the slide plate 85 moves outward in the radial direction by centrifugal force. However, the slide plate 85 is lubricated on the planetary shaft 30. A protrusion 88 that enters the oil passage 32 of the oil passage 31 is formed. For this reason, the slide plate 85 that is moved by the centrifugal force is brought into contact with a position closer to the outer side of the introduction oil passage 32 in the radial direction around the rotation center shaft 65 due to the outward movement in the radial direction. When you do, the movement stops.

  As described above, when the slide plate 85 is moved by the centrifugal force and the movement is stopped by the protrusion 88 coming into contact with the position closer to the outer side of the introduction oil passage 32, the introduction oil passage 32 is the protrusion of the slide plate 85. A portion on the inner side in the radial direction centering on the rotation center shaft 65 with respect to the portion 88 is open to the catch tank 70. For this reason, the introduction oil passage 32 is in an open state with respect to the inner oil storage portion 82 located on the inner side in the radial direction around the rotation center shaft 65 with respect to the boundary portion 86 in the catch tank 70. The oil passage 32 and the inner oil storage section 82 are in communication with each other. Accordingly, when the input shaft 16 rotates, the lubricating oil accumulated in the inner oil storage portion 82 of the catch tank 70 flows from the inner oil storage portion 82 to the introduction oil passage 32.

  Further, in this case, since the protruding portion 88 is in contact with the position closer to the outside of the introduction oil passage 32, the introduction oil passage 32 is centered on the rotation center shaft 65 than the boundary portion 86 in the catch tank 70. It will be in the state which does not open substantially with respect to the outer side oil storage part 81 located in the outer side in radial direction. For this reason, the lubricating oil that has flowed from the inner oil reservoir 82 to the introduction oil passage 32 does not flow to the outer oil reservoir 81.

  The lubricating oil that has flowed from the inner oil storage portion 82 to the introduction oil passage 32 flows through the introduction oil passage 32 and flows to the supply oil passage 33 that communicates with the introduction oil passage 32. Since the supply oil passage 33 penetrates the planetary shaft 30 and the introduction oil passage 32, the supply oil passage 33 extends in two directions from the introduction oil passage 32 toward the outer peripheral surface of the planetary shaft 30 through the introduction oil passage 32. Of the supply oil passages 33, one of the supply oil passages 33 is located more outward than the introduction oil passage 32 in the radial direction around the rotation center shaft 65. When the input shaft 16 is rotating, the planetary carrier 25 is also rotating, and the planetary shaft 30 connected to the planetary carrier 25 is revolving around the rotation center axis 65. For this reason, centrifugal force is also acting on the planetary shaft 30, and centrifugal force is also acting on the lubricating oil flowing through the lubricating oil passage 31 of the planetary shaft 30, so that the lubricating oil flowing in the supply oil passage 33 is Of the supply oil passages 33 formed in two directions from the introduction oil passage 32, the flow mainly flows into the supply oil passage 33 located outward in the radial direction around the rotation center shaft 65.

  Since the supply oil passage 33 is open to the outer peripheral surface of the planetary shaft 30, the lubricating oil that has flowed into the supply oil passage 33 flows out of the planetary shaft 30. The lubricating oil flows out from the supply oil passage 33 in this way, but a needle bearing 35 is provided around the planetary shaft 30. For this reason, the lubricating oil flows to each part of the needle bearing 35 and lubricates each part. Specifically, the lubricating oil flows between the needle 36 and the planetary shaft 30, between the needle 36 and the planetary gear 24, between the end of the needle 36 and the spacer 37, and between the end of the needle 36 and the washer. 38 to lubricate these parts. In this way, when the input shaft 16 is rotated by the operation of the engine 3, the planetary gear 24 and the planetary shaft are caused by the lubricating oil accumulated in the inner oil storage portion 82 of the catch tank 70 by centrifugal force. Lubricate the lubrication part between 30.

  On the other hand, when the engine 3 stops and the rotation of the input shaft 16 stops, the planetary carrier 25 of the power split planetary gear 21 connected to the input shaft 16 also stops rotating. Furthermore, as the engine 3 stops, the oil pump that supplies the lubricating oil to the input shaft oil passage 17 formed in the input shaft 16 also stops. As a result, the lubricating oil is not supplied to the input shaft oil passage 17, and the lubricating oil in the input shaft oil passage 17 and the radial oil passage 18 has a centrifugal force due to the rotation of the input shaft 16 being stopped. Since it does not act, it will not flow out of the input shaft 16.

  When the engine 3 is stopped and the rotation of the input shaft 16 and the planetary carrier 25 is stopped, the lubricating oil does not flow out from the input shaft 16 in this way, so that it is connected to the planetary carrier 25 of the power split planetary gear 21. Although the lubricating oil does not flow into the catch tank 70 from the input shaft 16, the deceleration of the drive device 15 occurs when the vehicle 1 is running by the power of the second motor generator 8 even when the engine 3 is stopped. The planetary gear 41, the speed reduction mechanism 50, and the differential device 55 are operated. For this reason, even when the rotation of the planetary carrier 25 stops as the input shaft 16 stops rotating, the second motor generator 8 generates power or the vehicle 1 travels inertially. Since the ring gear 23 of the power split planetary gear 21 rotates, the planetary gear 24 of the power split planetary gear 21 rotates or revolves when the rotation of the ring gear 23 is transmitted.

  Here, each device included in the drive device 15 is provided in the housing of the drive device 15, and lubrication when these devices are operated supplies lubricating oil to each part by the above oil pump. In addition, the device of the drive device 15 is performed by splashing up the lubricating oil stored in the housing during operation. That is, the lubricating oil splashed up by the operation of the device included in the driving device 15 scatters in the housing of the driving device 15, and lubrication is performed by supplying the scattered lubricating oil to each device.

  Specifically, a part of the differential device 55 among the devices included in the drive device 15 is immersed in the lubricating oil stored in the housing of the drive device 15. Since the differential shaft 55 is connected to the drive shaft 61 to which the drive wheels 62 are connected, the differential device 55 operates regardless of the operating state of the engine 3 and the motor generator 5 when the vehicle 1 is traveling. For this reason, when the vehicle 1 travels, the lubricating oil in the drive device 15 is splashed up by the differential device 55 regardless of the operating state of the power source. As a result, the lubricant oil is supplied to each device included in the drive device 15, and each device is lubricated by the supplied lubricant oil regardless of the operating state of the power source.

  Thus, when the vehicle 1 is in the running state, the lubricating oil is splashed by the differential device 55 and supplied to each device of the drive device 15 regardless of the driving state of the power source. The lubricating oil is also supplied to the power split planetary gear 21 from the outside of the power split planetary gear 21. When the lubricating oil is supplied to the power split planetary gear 21 from the outside, that is, when the lubricant oil is supplied to the power split planetary gear 21 from the outside in the radial direction around the rotation center shaft 65, This lubricating oil also moves toward the catch tank 70 from the outside of the power split planetary gear 21 with respect to the catch tank 70. Thus, a part of the lubricating oil that has reached the portion where the catch tank 70 is disposed from the outside of the power split planetary gear 21 toward the catch tank 70 is directed downward from above by gravity, The part where the catch tank 70 is located is reached (arrow S in FIGS. 2 and 3).

  Since the lubricating oil splashed up by the differential device 55 thus reaches the catch tank 70 in the direction from the upper side to the lower side, the catch tank 70 has an upward direction when the planetary carrier 25 is stopped. Lubricating oil enters from the opened outer opening 77 or inner opening 78. That is, since the direction of the catch tank 70 differs depending on the stop position when the planetary carrier 25 is stopped, the opening 76 that opens upward when the planetary carrier 25 is stopped is formed in the catch tank 70 when the planetary carrier 25 is stopped. It depends on the stop position. For this reason, when the planetary carrier 25 is stopped, the lubricating oil enters the catch tank 70 from the opening 76 on the side of the outer opening 77 and the inner opening 78 that opens upward.

  Specifically, the outer opening 77 of the catch tank 70 is located on the outer side in the radial direction around the rotation center shaft 65, and the inner opening 78 is located on the inner side in the radial direction. In addition, when the planetary carrier 25 is stopped, the catch tank 70 positioned on the upper half side of the planetary carrier 25, that is, on the upper side of the rotation center shaft 65, is a portion on the outer side in the radial direction around the rotation center shaft 65. Is directed upward, and the radially inner portion is directed downward. For this reason, when the planetary carrier 25 stops, in the catch tank 70 positioned on the upper half side of the planetary carrier 25, the outer opening 77 is opened upward, and the inner opening 78 is moved downward. It becomes an open state. Therefore, when the planetary carrier 25 stops, the lubricating oil that has reached the portion provided with the catch tank 70 located on the upper half side of the planetary carrier 25 in the direction from the top to the bottom is from the outer opening 77. Entering the inside of the catch tank 70, specifically entering the outer oil storage part 81 in the catch tank 70.

  Since the lubricating oil that has entered the outer oil reservoir 81 from the outer opening 77 flows in the catch tank 70 by gravity, it flows in the outer oil reservoir 81 from above to below. At that time, in the catch tank 70 located on the upper half side of the planetary carrier 25 when the planetary carrier 25 stops, the outward direction in the radial direction is closer to the upper direction in the vertical direction, and inward in the radial direction. The direction to go is closer to the lower direction in the vertical direction.

  For this reason, the lubricating oil flowing from the upper side to the lower side in the outer oil storage portion 81 due to gravity flows from the outer side to the inner side in the radial direction, but in the direction from the outer opening 77 toward the inner side in the radial direction. The boundary part 86 which the slide plate 85 has is located, and the space | gap between the boundary part 86 and the inside of the case part 71 is the minimum. As a result, the lubricating oil does not flow inward in the radial direction from the boundary portion 86, and the lubricating oil accumulates in the outer oil storage portion 81. When the lubricating oil accumulates in the outer oil storage portion 81, the weight of the lubricating oil acts on the boundary portion 86 located inside the outer oil storage portion 81 in the radial direction.

  That is, the weight of the lubricating oil acts downward, but when the planetary carrier 25 stops, the catch tank 70 located on the upper half side of the planetary carrier 25 acts in the radially inward direction. The boundary portion 86 is given an inward force in the radial direction by the lubricating oil. For this reason, the slide plate 85 moves inward in the radial direction along the guide portion 75 of the case portion 71. The slide plate 85 moves inward in the radial direction due to the gravity acting on the lubricating oil as described above, and the projection formed on the slide plate 85 and entering the introduction oil passage 32 of the planetary shaft 30 by this movement. The movement stops when the portion 88 comes into contact with the radially inward position of the introduction oil passage 32.

  As described above, when the slide plate 85 moves by receiving the weight of the lubricating oil and stops moving by coming into contact with the inward position of the introduction oil passage 32, the introduction oil passage 32 A portion on the outer side in the radial direction centering on the rotation center shaft 65 with respect to the projecting portion 88 is open to the inside of the catch tank 70. For this reason, the introduction oil passage 32 is in an open state with respect to the outer oil storage portion 81 located on the outer side in the radial direction around the rotation center shaft 65 with respect to the boundary portion 86 in the catch tank 70. The oil passage 32 and the outer oil storage portion 81 are in communication with each other. Therefore, when the rotation of the input shaft 16 is stopped and the planetary carrier 25 is stopped, the lubricating oil accumulated in the outer oil storage part 81 of the catch tank 70 is positioned on the upper half side of the planetary carrier 25, so that the outer oil storage part It flows from 81 to the introduction oil passage 32.

  Further, in this case, since the projecting portion 88 is in contact with an inward position of the introduction oil passage 32, the introduction oil passage 32 is centered on the rotation center shaft 65 rather than the boundary portion 86 in the catch tank 70. It will be in the state which does not open substantially with respect to the inner side oil storage part 82 located in the inner side in radial direction. For this reason, the lubricating oil that has flowed from the outer oil reservoir 81 to the introduction oil passage 32 does not flow to the inner oil reservoir 82.

  When the lubricating oil that has flowed from the outer oil storage portion 81 to the introduction oil passage 32 flows from the introduction oil passage 32 to the supply oil passage 33, the lubricating oil mainly flows downward due to gravity, so that the outer periphery of the planetary shaft 30 from the introduction oil passage 32. Of the two-way supply oil passages 33 formed toward the surface, the oil flows in the supply oil passage 33 located below the introduction oil passage 32. The lubricating oil that has flowed into the supply oil passage 33 flows out of the planetary shaft 30 and lubricates the needle bearing 35 as in the case where the input shaft 16 is rotating.

  Thus, when the rotation of the planetary carrier 25 is stopped, the lower half of the planetary carrier 25 is stopped when the rotation of the planetary carrier 25 is stopped against the lubrication by the lubricating oil accumulated in the catch tank 70 located on the upper half side of the planetary carrier 25 when the rotation of the planetary carrier 25 is stopped. In the catch tank 70 located on the side, the outer opening 77 is opened downward, and the inner opening 78 is opened upward. Therefore, when the planetary carrier 25 stops, the lubricating oil that has reached the portion where the catch tank 70 located on the lower half side of the planetary carrier 25 is provided in the direction from the top to the bottom is from the inner opening 78. It enters the inside of the catch tank 70, and specifically enters the inner oil storage section 82 in the catch tank 70.

  The lubricating oil that has entered the inner oil storage part 82 from the inner opening 78 flows from the upper side to the lower part in the inner oil storage part 82 by gravity. At that time, in the catch tank 70 located on the lower half side of the planetary carrier 25 when the planetary carrier 25 stops, the outward direction in the radial direction is closer to the lower direction in the vertical direction, and the inner side in the radial direction. The direction toward is closer to the upper side in the vertical direction.

  For this reason, the lubricating oil flowing from the upper side to the lower side in the inner oil storage portion 82 due to gravity flows outward in the radial direction, but in the direction outward from the inner opening 78 in the radial direction, it slides. The boundary part 86 which the board 85 has is located, and the space | gap between the boundary part 86 and the inner side of the case part 71 is the minimum. Accordingly, the lubricating oil does not flow outward in the radial direction from the boundary portion 86, and the lubricating oil is accumulated in the inner oil storage portion 82. When the lubricating oil accumulates in the inner oil storage portion 82, the weight of the lubricating oil acts on the boundary portion 86 located outside the inner oil storage portion 82 in the radial direction.

  That is, the weight of the lubricating oil acts downward, but when the planetary carrier 25 stops, the catch tank 70 located on the lower half side of the planetary carrier 25 acts in a radially outward direction. The slide plate 85 is given a radially outward force from the lubricating oil. For this reason, the slide plate 85 moves outward in the radial direction along the guide portion 75 of the case portion 71. The slide plate 85 moves outward in the radial direction due to the gravity acting on the lubricating oil in this way, and the protrusion formed on the slide plate 85 and entering the introduction oil passage 32 of the planetary shaft 30 by this movement. The movement stops when the portion 88 comes into contact with a position on the outer side of the introduction oil passage 32 in the radial direction.

  In this way, when the slide plate 85 moves by receiving the weight of the lubricating oil and stops moving by coming into contact with the position closer to the outside of the introduction oil passage 32, the introduction oil passage becomes a protrusion of the slide plate 85. A portion on the inner side in the radial direction centering on the rotation center shaft 65 with respect to the portion 88 is open to the catch tank 70. For this reason, the introduction oil passage 32 is in an open state with respect to the inner oil storage portion 82 located on the inner side in the radial direction around the rotation center shaft 65 with respect to the boundary portion 86 in the catch tank 70. The oil passage 32 and the inner oil storage section 82 are in communication with each other. For this reason, when the rotation of the input shaft 16 is stopped and the planetary carrier 25 is stopped, the lubricating oil accumulated in the inner oil storage portion 82 of the catch tank 70 is located on the lower half side of the planetary carrier 25 so that the inner oil storage The oil flows from the portion 82 to the introduction oil passage 32.

  Further, in this case, since the projecting portion 88 is in contact with a position on the outer side of the introduction oil passage 32, the lubricating oil that has flowed from the inner oil storage portion 82 to the introduction oil passage 32 is the same as when the planetary carrier 25 rotates. Does not flow into the outer oil storage part 81. In addition, the protrusion 88 of the slide plate 85 is provided so as to be movable in the radial direction around the rotation center shaft 65 as described above, and is lubricated by moving in the radial direction according to the rotation state of the planetary carrier 25. An oil storage section that allows oil to flow into the lubricating oil passage 31 is provided as a switching section that can be switched between the outer oil storage section 81 and the inner oil storage section 82.

  When the lubricating oil that has flowed from the inner oil storage portion 82 to the introduction oil passage 32 flows from the introduction oil passage 32 to the supply oil passage 33, the lubricating oil mainly flows downward due to gravity, so that the outer periphery of the planetary shaft 30 from the introduction oil passage 32. Of the two-way supply oil passages 33 formed toward the surface, the oil flows in the supply oil passage 33 located below the introduction oil passage 32. The lubricating oil that has flowed into the supply oil passage 33 flows out of the planetary shaft 30 and lubricates the needle bearing 35 as in the case where the input shaft 16 is rotating.

  In the above planetary gear mechanism lubrication structure, the oil is stored in the outer oil storage portion 81 or the inner oil storage portion 82 in accordance with the rotational state of the planetary carrier 25, and the oil storage portion that causes the lubricant oil to flow into the lubricating oil passage 31 by the protrusion 88 is provided. The outer oil storage part 81 and the inner oil storage part 82 are switched. As a result, the lubricating oil accumulated in the outer oil storage portion 81 or the inner oil storage portion 82 can flow to the lubricating oil passage 31 according to the rotation state of the planetary carrier 25, so that the lubrication can be performed regardless of the rotation state of the planetary carrier 25. Oil can be supplied to the lubrication between the planetary gear 24 and the planetary shaft 30. As a result, stable lubrication can be performed regardless of the rotation state.

  Further, by connecting the catch tank 70 having the outer oil storage portion 81 and the inner oil storage portion 82 to the planetary carrier 25 in this way, by supplying the lubricating oil to the desired lubricating portion regardless of the rotation state, Lubrication can be performed without newly providing another device such as an oil pump that operates according to the rotation state of the input shaft 16 and the planetary carrier 25. As a result, it is possible to suppress an increase in cost when the lubrication is stably performed regardless of the rotation state, and it is not necessary to control a new device, thereby suppressing the complicated control. Can do.

  Further, the protrusion 88 of the slide plate 85 enters the lubricating oil path 31 and moves in the radial direction around the rotation center axis 65 by centrifugal force or gravity according to the rotation state of the planetary carrier 25, so the lubricating oil path 31. It is possible to more reliably switch the flow of the lubricating oil to the desired state. For this reason, the oil storage part which flows lubricating oil to the lubricating oil path 31 can be switched more reliably so that it flows from the oil storage part suitable for a rotation state among the outer side oil storage part 81 and the inner side oil storage part 82. As a result, it is possible to perform the lubrication more stably regardless of the rotation state.

  Further, the protrusion 88 is formed integrally with a boundary portion 86 provided at the boundary between the outer oil storage portion 81 and the inner oil storage portion 82, and is provided so as to be movable in the radial direction integrally with the boundary portion 86. When the oil storage part that flows the lubricating oil to the lubricating oil path 31 is switched by moving the protrusion 88, switching can be performed more reliably. As a result, it is possible to perform the lubrication more stably regardless of the rotation state.

  Further, since the outer opening 77 and the inner opening 78 are provided, the lubricating oil can be introduced into the oil storage part suitable for the rotating state according to the rotating state of the planetary carrier 25. As a result, the lubricating oil can be more reliably stored in the oil storage part suitable for the rotational state among the outer oil storage part 81 and the inner oil storage part 82, and from the outer oil storage part 81 or the inner oil storage part 82 in which the lubricating oil is stored. The lubricating oil can be supplied to the lubricating portion by flowing the lubricating oil through the lubricating oil passage 31. As a result, it is possible to perform the lubrication more stably regardless of the rotation state.

  The catch tank 70 is formed in a substantially U-shape when the case portion 71 is viewed in the radial direction centered on the rotation center shaft 65, and the slide plate 85 is formed on the inner side of the case portion 71. However, the case portion 71 and the slide plate 85 may be formed in a shape other than such a shape. Further, the catch tank 70 has a guide portion 75 formed in the case portion 71, and a notch portion 87 into which the guide portion 75 enters the slide plate 85 so that the slide plate 85 can move along the guide portion 75. Thus, the slide plate 85 is movable in the radial direction around the rotation center shaft 65, but the structure when the slide plate 85 is movable may be other than this. The catch tank 70 has an outer oil storage part 81 that is a first oil storage part and an inner oil storage part 82 that is a second oil storage part, and a slide plate 85 having a protrusion 88 provided as a switching part is provided as a rotating part. If the oil storage part which moves according to the rotation state of the planetary carrier 25 and can flow lubricating oil to the lubricating oil path 31 is provided so that switching is possible, the shape and structure will not be ask | required.

  In the lubricating structure of the planetary gear mechanism according to the embodiment, three planetary gears 24 included in the power split planetary gear 21 are provided, and three catch tanks 70 are provided according to the planetary gear 24. The number of planetary gears 24 and catch tanks 70 may be other than three. Regardless of the number of planetary gears 24, the catch tank 70 is provided so that lubricating oil can be supplied to the lubricating oil passage 31 formed in the planetary shaft 30 that supports the planetary gear 24 so as to be able to rotate. Even when it is provided, the lubricating oil can be stably supplied to the lubricating portion between the planetary gear 24 and the planetary shaft 30.

  Further, in the planetary gear mechanism lubrication structure according to the embodiment, a part of the differential device 55 is immersed in the lubricating oil stored in the housing of the drive device 15, and the lubrication of each device included in the drive device 15 is performed. While the differential device 55 is activated, the differential device 55 splashes up the lubricating oil and supplies the lubricating oil to each part. However, the lubrication of each device may be performed by other means. For example, lubrication may be performed by splashing the lubricating oil with a device other than the differential device 55, and the lubricating oil may be supplied to each device by a method other than the splashing when the device is operated for lubrication. May be.

  In the lubrication structure of the planetary gear mechanism according to the embodiment, the lubrication structure of the power split planetary gear 21 included in the driving device 15 of the hybrid vehicle is described. However, the lubrication structure of the planetary gear mechanism according to the present invention You may apply to planetary gear mechanisms other than the division | segmentation planetary gear 21. FIG. The planetary gear mechanism lubrication structure according to the present invention may be used for any planetary gear mechanism as long as it is a planetary gear mechanism lubrication structure in which the planetary carrier 25 rotates or stops during operation of the planetary gear mechanism.

  As described above, the planetary gear mechanism lubrication structure according to the present invention is useful in the case where the rotating portion of the planetary gear is more reliably lubricated, and in particular, the state in which the rotation of the input shaft stops during traveling of the vehicle. Suitable for existing planetary gear mechanism.

It is the schematic of a vehicle provided with the lubrication structure of the planetary gear mechanism which concerns on an Example. FIG. 2 is a detailed view of the power split planetary gear shown in FIG. 1. It is an AA arrow line view of FIG. It is a BB arrow line view of FIG. It is a perspective view of the case part which the catch tank shown in FIG. 2 has. It is a perspective view of the slide board which the catch tank shown in FIG. 2 has. It is explanatory drawing which shows a state in case the planetary carrier is rotating.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vehicle 3 Engine 5 Motor generator 6 1st motor generator 8 2nd motor generator 10 ECU
DESCRIPTION OF SYMBOLS 15 Drive apparatus 16 Input shaft 20 Power split integration mechanism 21 Power split planetary gear 24 Planetary gear 25 Planetary carrier 30 Planetary shaft 31 Lubricating oil path 35 Needle bearing 41 Reduction planetary gear 50 Reduction mechanism 55 Differential device 61 Drive shaft 62 Drive wheel 65 Rotation center shaft 70 Catch tank 71 Case part 75 Guide part 76 Opening part 77 Outer opening part 78 Inner opening part 81 Outer oil storage part 82 Inner oil storage part 85 Slide plate 86 Boundary part 87 Notch part 88 Protrusion part

Claims (4)

A rotating part provided to be rotatable around a rotation center axis;
A lubricating member connected to the rotating part and provided integrally with the rotating part so as to be rotatable and having a lubricating oil passage for supplying lubricating oil to the lubricating part;
The rotating oil is connected to the rotating part and is provided so as to be rotatable integrally with the rotating part, and the lubricating oil that has entered from the opening through which the lubricating oil can enter is rotated in the rotating part. A first oil storage part and a second oil storage part that can be stored in accordance with the first oil storage part and the second oil storage part, the lubricating oil stored in the first oil storage part or the second oil storage part can flow to the lubricating oil path, A switching portion provided so as to be movable in a radial direction around the rotation center axis and capable of switching between a first oil storage portion and a second oil storage portion as an oil storage portion for flowing the lubricating oil through the lubricating oil passage. A catch tank having,
A planetary gear mechanism lubrication structure comprising:   The switching unit enters the lubricating oil passage, and moves in the radial direction according to the rotation state of the rotating portion, thereby causing an oil storage portion to flow the lubricating oil to the lubricating oil passage as the first oil storage portion. 2. The planetary gear mechanism lubrication structure according to claim 1, wherein switching is performed between the second oil storage section and the second oil storage section.   Furthermore, it is provided in the boundary of the said 1st oil storage part and the said 2nd oil storage part, and is provided with the boundary part which can be moved to the said radial direction integrally with the said switch part, or characterized by the above-mentioned. 2. A lubricating structure of the planetary gear mechanism according to 2.   The opening has a first opening into which the lubricating oil stored in the first oil storage part enters, and a second opening into which the lubricating oil stored in the second oil storage part enters. The lubricating structure of the planetary gear mechanism according to any one of claims 1 to 3.

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