JP5304237B2 - 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 passage 31 for feeding lubricating oil to a needle bearing 35 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 by a catch tank 70 having a first oil containing section 81 capable of containing lubricating oil inward in the radial direction and in the circumferential direction, and a second oil containing section 82 capable of containing lubricating oil outward in the radial direction. Thereby, lubricating oil can be contained in the first oil containing section 81 and the second oil containing section 82 according to the rotating state of the planetary carrier 25, and the lubricating oil can be made to flow into the lubricating passage 31 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 to be splashed, 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 lubrication member which is provided so as to be rotatable integrally with the rotating part and has a lubricating oil passage for supplying lubricating oil to the lubricating part; and connected to the rotating part and integral with the rotating part The first oil storage section is provided so as to be rotatable and can collect the lubricating oil inward in the radial direction around the rotation center axis and in the circumferential direction around the rotation center axis. And a second oil storage part capable of storing the lubricating oil outward in the radial direction, and the lubricating oil stored in the first oil storage part or the second oil storage part is included in the lubricating oil passage A catch tank that can be shed Characterized in that it comprises a.

  In the present invention, the first oil storage section that can store the lubricating oil in the radially inward and circumferential directions in the catch tank that is connected to the rotating section and rotates integrally with the rotating section, and the lubricating oil A second oil storage section that can be stored outward in the radial direction is provided. Thereby, when the rotating part is rotating, the lubricating oil can be accumulated in the second oil storage part by centrifugal force, and when the rotating part is stopped, the lubricating oil is collected by gravity into the first oil storing part or the second oil storing part. Can be stored. In other words, the catch tank is connected to the rotating part and rotates integrally with the rotating part. Therefore, when the rotating part stops, the catch tank also stops rotating, but when the catch tank stops, it stops. Depending on the position, the catch tank stores the lubricating oil at different positions for storing the lubricating oil.

  That is, on the upper half side of the rotating part, gravity acts inward or circumferentially in the radial direction when viewed from the rotating part, so when the catch tank is located on the upper half side of the rotating part when the rotating part stops In this case, the catch tank can store the lubricating oil in the first oil storage portion that is provided so as to be able to store the lubricating oil inward and in the circumferential direction in the radial direction. On the lower half side of the rotating part, gravity acts outward or circumferentially in the radial direction when viewed from the rotating part, so when the catch tank is located on the lower half side of the rotating part when the rotating part stops In addition, the catch tank can store the lubricating oil in the second oil storage section that can store the lubricating oil outward in the radial direction. Since the catch tank is provided as described above, the lubricating oil can be stored even when the rotating portion is rotating or when the rotation is stopped.

  The catch tank can cause the lubricating oil stored in the first oil storage section or the second oil storage section to flow through the lubricating oil passage formed in the lubricating member. As a result, even when the rotating part is rotating or when the rotation is stopped, the lubricating oil is accumulated in the catch tank, and the accumulated lubricating oil is allowed to flow through the lubricating oil path to be desired from the lubricating oil path. Lubricating oil can be supplied to the lubricating 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 catch tank has a protruding portion protruding outward in the radial direction, and the first oil storage portion Comprises at least a radial wall portion that is an outwardly facing wall portion in the radial direction, and a circumferential wall portion that is formed by the protrusion and faces the circumferential direction. It is characterized by.

  In the present invention, the catch tank is provided with a protrusion, and the protrusion is formed with the circumferential wall portion of the first oil storage portion, so that the first oil storage portion is divided between the circumferential wall portion and the radial wall portion. The lubricating oil can be stored in the inner and circumferential directions in the radial direction. Therefore, when the catch tank is positioned on the upper half side of the rotating unit when the rotating unit is stopped, the lubricating oil can be more reliably stored in the first oil storage unit. As a result, the lubricating oil stored in the first oil storage part can be more reliably supplied to the lubricating oil path and supplied to the lubricating part from the lubricating oil path. 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 planetary gear mechanism lubrication structure, wherein the catch tank further includes a first opening that opens outward in the radial direction, and the radial direction. And a second opening that opens inward.

  In this invention, since the first opening and the second opening are formed in the catch tank, the lubricant can be stored in the catch tank regardless of the rotation state of the rotating part. In other words, since the first opening is opened outward in the radial direction, the lubricating oil that scatters around the catch tank and falls by gravity even when the rotation of the rotating part is stopped is dropped. It can be received at one opening. In addition, since the second opening is opened inward in the radial direction, the lubricating oil that is directed outward in the radial direction from the inside of the catch tank in the radial direction by the centrifugal force during rotation of the rotating portion is 2 openings can be received. Therefore, the lubricating oil can be more reliably received in the catch tank regardless of the rotation state, and the lubricating oil can be stored in the first oil storage part or the second oil storage part. 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 the lubrication structure of the planetary gear mechanism, wherein the first opening, the second opening, and the first oil storage part are the lubricating oil in the circumferential direction. It is provided on both sides of the opening of the road.

  In this invention, since the first opening and the second opening are provided on both sides of the opening of the lubricating oil passage in the circumferential direction, a wider range of lubricating oil can be received by the catch tank. In addition, since the first oil storage portion is also provided on both sides of the opening of the lubricating oil passage in the circumferential direction, the first oil storage portion is provided on both sides of the opening of the lubricating oil passage in the circumferential direction when the rotation of the rotating portion stops. Will be located. When the lubricating oil accumulated in the first oil reservoir is caused to flow through the lubricating oil passage, the lubricating oil accumulated in the first oil reservoir located on the upper side of the lubricating oil passage is caused to flow into the lubricating oil passage. By providing the oil storage portions on both sides of the opening of the lubricating oil passage in the circumferential direction, when the two first oil storage portions have different heights when the rotation of the rotating portion stops, the first oil storage portion It will be located on both sides of the opening of the lubricating oil passage. For this reason, when the rotation of the rotating part is stopped, the range of the stop position of the catch tank in which the lubricating oil stored in the first oil storage part can flow into the lubricating oil path can be widened. As a result, when the rotation of the rotating part is stopped, the lubricating oil can be more reliably supplied to the lubricating part, and the lubricating can be performed more reliably and stably regardless of the rotating state.

  In the planetary gear mechanism lubrication structure according to the present invention, in the planetary gear mechanism lubrication structure, the second oil reservoir is formed to protrude outward from the opening of the lubricating oil passage in the radial direction. It is characterized by.

  In this invention, since the second oil storage part is formed to project outward from the opening of the lubricating oil passage in the radial direction, when the catch tank rotates together with the rotating part during rotation of the rotating part, centrifugal force Thus, the lubricating oil that is going outward in the radial direction can be stored in the second oil storage section. As a result, when the rotating part rotates, the lubricating oil can be supplied more reliably to the lubricating part, and the lubricating can be performed more reliably and stably regardless of the rotating 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.

  FIG. 3 is an AA arrow view of FIG. Further, the planetary carrier 25 of the power split planetary gear 21 is connected to the end of the planetary shaft 30 on the side where the supply oil passage 33 is opened in the planetary carriers 25 formed on both sides of the planetary gear 24. A catch tank 70 capable of storing lubricating oil is connected to the planetary carrier 25 on the other side. The catch tanks 70 are disposed in the planetary carrier 25 in the vicinity of the position where the planetary shaft 30 is provided, and the number of the catch tanks 70 is the same as the number of the planetary gears 24. 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.

  4 is a cross-sectional view taken along line BB in FIG. FIG. 5 is a CC arrow view of FIG. FIG. 6 is a perspective view of the catch tank shown in FIG. The catch tank 70 is formed in a columnar shape whose bottom surface is a shape in which the apex portion of the isosceles triangle is substantially semicircular. That is, it is formed in a shape in which a portion near the apex angle in a triangular prism whose bottom surface is an isosceles triangle is replaced with a semi-cylinder. The catch tank 70 formed in such a shape is shielded at one end at both ends of the columnar shape, is open at the other end, and is hollow inside. The catch tank 70 can store lubricating oil therein.

  Specifically, the end of the catch tank 70 on the shielded side is shielded by the outer wall 71. Further, the catch tank 70 is formed with a wall portion along the outer periphery of the outer wall portion 71, and the wall portion corresponding to the base portion of the isosceles triangle is the radial wall portion 73. It has become. Of the wall portions formed along the outer periphery of the outer wall portion 71, the wall portions located at both ends of the radial wall portion 73 and connected to the radial wall portion 73 are inclined wall portions 74. ing. Further, the wall portion that corresponds to the semicircular portion and connects the two slope wall portions 74 is a cylindrical wall portion 75. The cylindrical wall portion 75 is formed at a position facing the radial wall portion 73, and has a curved shape protruding in a direction away from the radial wall portion 73.

  In addition, a protrusion 76 protruding from the radial wall 73 toward the cylindrical wall 75 is formed inside the catch tank 70. That is, the protrusion 76 is formed to protrude outward in the radial direction around the rotation center shaft 65. The protrusion 76 is located near the center in the length direction of the radial wall 73, that is, near the center between both ends of the radial wall 73 connected to the slope wall 74. It protrudes toward the cylindrical wall 75 with the same width as the radial wall 73. As described above, the protrusion 76 has the radial wall 73 bent toward the cylindrical wall 75 near the center in the length direction or with a corner toward the inside of the catch tank 70. It is formed by. As a result, the protrusion 76 has two planar walls, and the two walls constituting the protrusion 76 are circumferential wall 77.

  Further, the radial wall 73 is divided at the portion where the protrusion 76 is formed by the protrusion 76 thus formed. In other words, both ends of the two divided radial wall portions 73 located on the opposite side of the end portion to which the inclined wall portion 74 is connected are connected to the protrusion 76.

  The two inclined wall portions 74 whose both ends are connected to the radial wall portion 73 and the cylindrical wall portion 75 are each formed with an outer opening 78 that is a first opening that is opened in a rectangular shape. Yes. The radial wall 73 has a notch at the end opposite to the end connected to the outer wall 71, and this portion becomes a notch 79 as a second opening. ing. The notch 79 is formed with a predetermined width along the direction between both ends of the radial wall 73 connected to the two inclined wall portions 74, that is, along the length direction of the radial wall 73. And formed in both radial wall portions 73 of the radial wall portion 73 divided by the protrusion 76.

  The outer opening 78 and the notch 79 are both when viewed in the vertical direction of the radial wall 73 or when viewed in the radial direction about the rotation center axis 65. It is preferable that the outer opening 78 and the notch 79 are completely displaced from each other when viewed from these directions. The notch 79 formed in the radial wall 73 is formed at a predetermined distance from the projection 76 in the direction of the connecting portion between the radial wall 73 and the slope wall 74. Is preferred.

  Further, the end of the catch tank 70 on the open side, the outer portion of the projection 76, that is, the portion between the two circumferential wall portions 77, has a plate-like shape that approximates the shape of the projection 76. A shielding plate 72 that is formed in a shape and is formed so as to fill between the two circumferential wall portions 77 is provided.

  The catch tank 70 formed in this way is provided in the vicinity of the portion of the planetary carrier 25 of the power split planetary gear 21 to which the planetary shaft 30 is connected, and is located on both sides of the planetary gear 24 in the width direction. The planetary carrier 25 is connected to the planetary carrier 25 on the side where the end of the planetary shaft 30 where the lubricating oil passage 31 is open is connected. That is, the catch tank 70 is connected to the planetary carrier 25 closer to the radial oil passage 18 formed in the input shaft 16. The direction is such that the end side of the open side, that is, the end side opposite to the side where the outer wall portion 71 is provided is positioned in the direction of the planetary carrier 25.

  The catch tank 70 connected in this direction is connected to the planetary carrier 25 in a state where most of the opening 34 of the lubricating oil passage 31 formed in the planetary shaft 30 is opened in the catch tank 70. At that time, the opening 34 of the lubricating oil passage 31 is opened in the catch tank 70 in a state of being located near the center of the width of the catch tank 70 in the circumferential direction around the rotation center shaft 65. Further, since the catch tank 70 is connected to the planetary carrier 25 in this way, the end of the catch tank 70 on the opened side is closed by the planetary carrier 25, and the catch tank 70 is Communicates with the lubricating oil passage 31. In addition, a portion of the opening 34 of the lubricating oil passage 31 that is located at a portion where the protrusion 76 of the catch tank 70 is formed is closed by a shielding plate 72.

  The catch tank 70 is located on the outer side in the radial direction with the cylindrical wall portion 75 centered on the rotation center axis 65 of the input shaft 16, that is, on the outer side in the radial direction centered on the rotation center axis 65. The radial wall portion 73 is provided in a direction located on the inner side in the radial direction. For this reason, as for the radial direction wall part 73, the inner surface has faced outward in the radial direction in general. Further, the protruding portion 76 has a shape protruding outward in the radial direction, and the circumferential wall portion 77 constituting the protruding portion 76 is generally in the circumferential direction around the rotation center axis 65 of the input shaft 16. Facing.

  Further, since the slope wall portion 74 is provided between the radial wall portion 73 and the cylindrical wall portion 75, the slope wall portion 74 is centered on the rotation center axis 65 rather than the radial wall portion 73. It is located outward in the radial direction. For this reason, the outer side opening part 78 formed in this slope wall part 74 is opened toward the outward in radial direction. Further, the outer surface of the catch tank 70 faces the inward side of the radial wall 73 in the radial direction around the rotation center shaft 65. For this reason, the notch 79 formed in the radial wall 73 opens toward the inside in the radial direction.

  Further, the slope wall portion 74 is connected to both ends of the radial wall portion 73, and the opening 34 of the lubricating oil passage 31 formed in the planetary shaft 30 is caught in the circumferential direction around the rotation center shaft 65. It opens near the center of the width of the tank 70. Therefore, the slope wall 74 is provided on both sides of the opening 34 of the lubricating oil passage 31 in the circumferential direction around the rotation center axis 65, and the outer opening 78 formed in the slope wall 74 is also It is provided on both sides of the opening 34 of the lubricating oil passage 31 in the circumferential direction. Similarly, the radial wall 73 divided by the portion where the protrusion 76 is formed is also provided on both sides of the opening 34 of the lubricating oil passage 31 in the circumferential direction around the rotation center shaft 65. The notches 79 formed in the radial wall 73 are also provided on both sides of the opening 34 of the lubricating oil passage 31 in the circumferential direction.

  The catch tank 70 is connected to the planetary carrier 25 as described above and is provided so as to be able to store the lubricating oil. The catch tank 70 provided in this way is an oil storage part that can store the lubricating oil. The first oil storage part 81 and the second oil storage part 82 are provided. Among these, the 1st oil storage part 81 is the edge of the side where the radial direction wall part 73, the circumferential direction wall part 77 formed of the projection part 76, the outer side wall part 71, and the catch tank 70 are opened. It is comprised with the planetary carrier 25 which obstruct | occluded the part. As a result, the first oil storage section 81 can accumulate the lubricating oil in the radial direction around the rotation center axis 65 and in the circumferential direction around the rotation center axis 65. Further, the first oil storage portion 81 is configured to include the circumferential wall portion 77 as described above, and the circumferential wall portion 77 is a radial wall portion in the length direction of the radial wall portion 73 of the protrusion 76. Since the first oil storage portion 81 is also provided on both sides of the protrusion 76, the first oil storage portion 81 is also provided on both sides of the protrusion 76. For this reason, the first oil storage part 81 is provided on both sides of the opening 34 of the lubricating oil passage 31 in the circumferential direction around the rotation center shaft 65. That is, the catch tank 70 has two first oil storage portions 81.

  Further, the second oil storage part 82 is constituted by the planetary carrier 25 similarly to the cylindrical wall part 75, the outer wall part 71, and the first oil storage part 81, and in the radial direction centered on the rotation center shaft 65, It is formed to project outward from the opening 34 of the lubricating oil passage 31 formed in the planetary shaft 30. As a result, the second oil storage section 82 can store the lubricating oil outward in the radial direction around the rotation center shaft 65. As described above, the catch tank 70 that can store the lubricating oil in the first oil storage portion 81 and the second oil storage portion 82 is in communication with the lubricating oil passage 31 of the planetary shaft 30 because the inside communicates therewith. The lubricating oil accumulated in the oil storage part 81 and the second oil storage part 82 can be caused to flow through the lubricating oil path 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 view showing a state in which lubricating oil has accumulated in the second oil storage section. 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. 2 and 3).

  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. The catch tank 70 is formed with a notch 79 that opens inward in the radial direction about the rotation center shaft 65. For this reason, when the lubricating oil discharged from the radial oil passage 18 of the input shaft 16 is directed outward in the radial direction and reaches the portion where the planetary carrier 25 is provided, the reached lubricating oil is notched. Enter inside 79.

  When the input shaft 16 is rotating, the planetary carrier 25 that is connected to the input shaft 16 and rotates with the rotation of the input shaft 16 also rotates, so that the catch tank 70 connected to the planetary carrier 25 is rotated. Also rotates. For this reason, the centrifugal force generated by the rotation of the catch tank 70 acts on the lubricating oil that has entered the catch tank 70 from the notch 79, and the outer periphery of the catch tank 70 in the radial direction centered on the rotation center shaft 65. Head towards.

  A portion of the catch tank 70 located radially outward is a cylindrical wall portion 75 protruding outward in the radial direction. For this reason, the lubricating oil traveling outward in the radial direction by centrifugal force is directed to the cylindrical wall portion 75 and accumulated in the cylindrical wall portion 75. That is, the lubricating oil 90 accumulates in the second oil storage part 82 constituted by the cylindrical wall part 75, the outer wall part 71, and the planetary carrier 25. Further, most of the opening 34 of the lubricating oil passage 31 formed in the planetary shaft 30 opens into the catch tank 70. For this reason, when the lubricating oil 90 accumulates in the second oil storage part 82 in this way, the accumulated lubricating oil 90 flows from the catch tank 70 to the lubricating oil passage 31. Specifically, the lubricating oil 90 flows from the second oil storage portion 82 of the catch tank 70 to the introduction oil passage 32 of the planetary shaft 30.

  The lubricating oil that has flowed from the second oil storage portion 82 to the introduction oil passage 32 travels 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 rotating due to the operation of the engine 3, the planetary gear 24 and the planetary gear 24 are caused by the lubricating oil accumulated in the second oil storage portion 82 of the catch tank 70 by centrifugal force. Lubricate the lubrication part between the reshaft 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 enters the catch tank 70 from the outer opening 78 of the catch tank 70 (arrow S in FIGS. 2 and 3), but when the rotation of the input shaft 16 is stopped, the planetary carrier 25 also rotates. In order to stop, the catch tank 70 is also stopped. In this case, the plurality of catch tanks 70 are stopped in different states depending on the position where they are stopped. For this reason, the lubricating oil that has entered the catch tank 70 accumulates in a state where the accumulation in the catch tank 70 differs depending on the stop position of the catch tank 70 or the direction of the catch tank 70.

  FIG. 8 is an explanatory view showing a state in which lubricating oil has accumulated in the first oil storage section. First, a description will be given of how the lubricating oil accumulates in the upper half of the power split planetary gear 21, that is, in the catch tank 70 that is positioned and stopped above the rotation center shaft 65. When the catch tank 70 is positioned and stopped on the upper half side of the power split planetary gear 21, the lubricating oil is an outer opening located on the upper side of the two outer openings 78 of the catch tank 70. The portion 78 enters the catch tank 70. Since the lubricating oil that has entered the catch tank 70 from the outer opening 78 flows downward due to gravity, the lubricating oil flows below the inflowing outer opening 78.

  Further, when the catch tank 70 is positioned and stopped on the upper half side of the power split planetary gear 21, the outer opening 78 positioned on the upper side is the protrusion 76 or the outer opening than the protrusion 76. It will be in the state located above the radial direction wall part 73 located in the 78 side. For this reason, the lubricating oil that flows in from the outer opening 78 and flows downward flows to a portion where the radial wall 73 and the circumferential wall 77 are provided.

  Of these, the radial wall 73 has an inner surface of the catch tank 70 facing outward in the radial direction around the rotation center shaft 65, and the circumferential wall 77 is the rotation of the input shaft 16. Since it faces in the circumferential direction centered on the central axis 65, these surfaces of the radial wall portion 73 and the circumferential wall portion 77 provided on the outer opening 78 side located on the upper side face upward. Become the direction. For this reason, the lubricating oil 90 that flows downward from the outer opening 78 and flows to a portion where the radial wall 73 and the circumferential wall 77 are provided has a portion of the radial wall 73 and the circumferential wall 77. It stops at the part where it is provided and accumulates in this part. In other words, the lubricating oil 90 that has flowed in from the outer opening 78 located on the upper side is the first oil storage section that is configured by the radial wall 73, the circumferential wall 77, the outer wall 71, and the planetary carrier 25. Accumulate at 81.

  In addition, since most of the opening 34 of the lubricating oil passage 31 formed in the planetary shaft 30 is opened in the catch tank 70, when the lubricating oil 90 collects in the first oil storage portion 81 in this way. In the same manner as when the lubricating oil 90 is accumulated in the second oil storage portion 82, the accumulated lubricating oil 90 flows from the catch tank 70 to the lubricating oil passage 31. Specifically, the lubricating oil 90 flows from the first oil storage portion 81 of the catch tank 70 to the introduction oil passage 32 of the planetary shaft 30.

  When the lubricating oil that has flowed into 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, and therefore, from the introduction oil passage 32 toward the outer peripheral surface of the planetary shaft 30. Of the two-way supply oil passages 33 formed, the oil flows into 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.

  Next, when the rotation of the input shaft 16 is stopped and the rotation of the planetary carrier 25 is stopped, the accumulation of lubricating oil in the catch tank 70 which is stopped on the lower half side of the power split planetary gear 21 is stopped. Will be explained. In the case of the catch tank 70 that is stopped at the lower half side of the power split planetary gear 21 when the rotation of the planetary carrier 25 is stopped, the lubricating oil is an outer opening that is positioned above the two outer openings 78. It enters the catch tank 70 from the part 78 or the notch 79. Since the lubricating oil that has entered the catch tank 70 from the outer opening 78 and the notch 79 flows downward due to gravity, the lubricating oil flows below the inflowing outer opening 78 and notch 79.

  Further, when the catch tank 70 is positioned and stopped on the lower half side of the power split planetary gear 21, the outer opening 78 positioned on the upper side is positioned above the cylindrical wall 75, and Of the two notches 79, the notch 79 positioned on the upper side is similarly positioned above the cylindrical wall 75. For this reason, the lubricating oil that flows in from the outer opening 78 and the notch 79 and flows downward flows to a portion where the cylindrical wall portion 75 is provided.

  Thus, since the cylindrical wall portion 75 through which the lubricating oil flows is formed to be curved, some of the inner surfaces of the cylindrical wall portion 75 are oriented upward. Therefore, the lubricating oil that flows downward from the outer opening 78 and the notch 79 and flows to the portion where the cylindrical wall portion 75 is provided stops at the cylindrical wall portion 75 and accumulates in this portion. That is, the lubricating oil 90 that has flowed in from the outer opening 78 or the notch 79 positioned on the upper side is accumulated in the second oil storage portion 82 that is constituted by the cylindrical wall portion 75, the outer wall portion 71, and the planetary carrier 25 (see FIG. 7). When the lubricating oil 90 accumulates in the second oil storage part 82, the accumulated lubricating oil 90 is introduced from the second oil storage part 82 to the planetary shaft 30 in the same manner as when the input shaft 16 is rotating. It flows to 32.

  When the lubricating oil that has flowed from the second oil storage section 82 to the introduction oil passage 32 flows from the introduction oil passage 32 to the supply oil passage 33, the lubricating oil is directed from the introduction oil passage 32 toward the outer peripheral surface of the planetary shaft 30. Of the two-way supply oil passages 33 formed, the oil flows into the supply oil passage 33 located below the introduction oil passage 32 and flows out of the planetary shaft 30 to lubricate the needle bearing 35. As described above, when the operation of the engine 3 is stopped and the rotation of the input shaft 16 and the planetary carrier 25 is stopped, the lubricating oil splashed up by the differential device 55 enters the catch tank 70. The lubrication portion between the planetary gear 24 and the planetary shaft 30 is lubricated by the lubricating oil accumulated in the first oil storage portion 81 and the second oil storage portion 82 of the catch tank 70.

  The lubricating structure of the planetary gear mechanism described above is connected to the planetary carrier 25 included in the power split planetary gear 21 constituted by the planetary gear mechanism, and is lubricated to the catch tank 70 that rotates integrally with the planetary carrier 25. The first oil storage part 81 that can store oil in the radial direction around the rotation center shaft 65 and the circumferential direction, and the lubricating oil are stored in the radial direction around the rotation center shaft 65. And a second oil storage section 82 that can be used. Thus, when the planetary carrier 25 is rotating, the lubricating oil can be stored in the second oil storage unit 82 by centrifugal force. When the planetary carrier 25 is stopped, the lubricating oil is collected by gravity by the first oil storage unit 81 or the first oil storage unit 81. 2 can be stored in the oil storage section 82. In other words, the catch tank 70 is connected to the planetary carrier 25 and rotates integrally with the planetary carrier 25. Therefore, when the planetary carrier 25 stops, the catch tank 70 also stops rotating. When stopped, the catch tank 70 stores the lubricating oil by changing the position where the lubricating oil is stored depending on the stopped position.

  That is, on the upper half side of the planetary carrier 25, gravity acts inward or circumferential in the radial direction around the rotation center axis 65 when viewed from the planetary carrier 25, so that when the planetary carrier 25 is stopped, the catch tank When the tank 70 is positioned on the upper half side of the planetary carrier 25, the catch tank 70 is provided so that the lubricating oil can be accumulated in the inner and circumferential directions in the radial direction around the rotation center shaft 65. Lubricating oil can be stored in the first oil storage portion 81. Further, on the lower half side of the planetary carrier 25, gravity acts outward or circumferentially in the radial direction when viewed from the planetary carrier 25, so that the catch tank 70 is placed in the lower half of the planetary carrier 25 when the planetary carrier 25 is stopped. When positioned on the side, the catch tank 70 can store the lubricating oil in the second oil storage section 82 that can store the lubricating oil outward in the radial direction. Since the catch tank 70 is provided as described above, the lubricating oil can be stored even when the planetary carrier 25 is rotating or when the rotation is stopped.

  The catch tank 70 can cause the lubricating oil stored in the first oil storage portion 81 or the second oil storage portion 82 to flow through the lubricating oil passage 31 formed in the planetary shaft 30 as described above. Thereby, even when the planetary carrier 25 is rotating or when the rotation is stopped, the lubricating oil is accumulated in the catch tank 70, and the accumulated lubricating oil is allowed to flow into the lubricating oil path 31 of the planetary shaft 30. Thus, the lubricating oil can be supplied from the lubricating oil passage 31 to the desired lubricating portion. As a result, stable lubrication can be performed regardless of the rotation state.

  Further, by connecting the catch tank 70 having the first oil storage portion 81 and the second oil storage portion 82 to the planetary carrier 25 in this way, the lubricating oil is supplied to the desired lubricating portion regardless of the rotation state. Thus, lubrication can be performed without newly providing another device such as an oil pump that operates in accordance with 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, by providing the catch tank 70 with a protrusion 76 and forming the circumferential wall 77 of the first oil reservoir 81 with the protrusion 76, the first oil reservoir 81 has a diameter equal to that of the circumferential wall 77. With the directional wall 73, the lubricating oil can be stored inward and circumferential in the radial direction. Therefore, when the catch tank 70 is positioned on the upper half side of the planetary carrier 25 when the planetary carrier 25 is stopped, the lubricating oil can be more reliably stored in the first oil storage portion 81. As a result, the lubricating oil accumulated in the first oil storage portion 81 flows more reliably into the lubricating oil passage 31 of the planetary shaft 30 and is directed from the lubricating oil passage 31 to the lubricating portion between the planetary shaft 30 and the planetary gear 24. Lubricating oil can be supplied. As a result, it is possible to perform the lubrication more stably regardless of the rotation state.

  Further, since the outer opening 78 and the notch 79 are formed in the catch tank 70, the lubricant can be stored in the catch tank 70 regardless of the rotation state of the planetary carrier 25. That is, since the outer opening 78 opens outward in the radial direction around the rotation center shaft 65, the other devices of the drive device 15 can be used even when the rotation of the planetary carrier 25 is stopped. As a result, the outer opening 78 can receive the lubricating oil that scatters around the catch tank 70 and falls by gravity. Further, since the notch 79 is opened inward in the radial direction around the rotation center shaft 65, the notch 79 has a diameter due to centrifugal force from the inside of the catch tank 70 in the radial direction when the planetary carrier 25 rotates. Lubricating oil directed outward in the direction can be received by the notch 79. Therefore, the lubricating oil can be more reliably received by the catch tank 70 regardless of the rotation state and can be stored by the first oil storage part 81 or the second oil storage part 82. As a result, it is possible to perform the lubrication more stably regardless of the rotation state.

  Further, since the outer opening 78 and the notch 79 are provided on both sides of the opening 34 of the lubricating oil passage 31 in the circumferential direction centering on the rotation center shaft 65, a wider range of lubricating oil is caught in the catch tank. Can be received at 70. Moreover, since the 1st oil storage part 81 is also provided in the both sides of the opening part 34 of the lubricating oil path 31 in the circumferential direction, when rotation of the planetary carrier 25 stops, the opening part 34 of the lubricating oil path 31 in the circumferential direction is stopped. The 1st oil storage part 81 will be located in both sides. When the lubricating oil collected in the first oil storage part 81 is caused to flow through the lubricating oil path 31 of the planetary shaft 30, the lubricating oil accumulated in the first oil storage part 81 on the side located above the lubricating oil path 31 is used as the lubricating oil path 31. However, by providing the first oil storage portions 81 on both sides of the opening 34 of the lubricating oil passage 31 in the circumferential direction, when the rotation of the planetary carrier 25 is stopped, the height of the two first oil storage portions 81 is increased. If the lengths are different, the first oil storage portion 81 is located on both sides of the opening 34 of the lubricating oil passage 31 in the vertical direction. For this reason, when the rotation of the planetary carrier 25 is stopped, the range of the stop position of the catch tank 70 in which the lubricating oil accumulated in the first oil storage portion 81 can flow to the lubricating oil passage 31 of the planetary shaft 30 can be widened. . As a result, when the rotation of the planetary carrier 25 is stopped, the lubricating oil can be more reliably supplied to the lubricating portion between the planetary shaft 30 and the planetary gear 24, and more reliably and stably regardless of the rotation state. Lubrication can be performed.

  Further, since the second oil storage portion 82 is formed so as to protrude outward from the opening 34 of the lubricating oil passage 31 in the radial direction around the rotation center shaft 65, the planetary carrier 25 is rotated when the planetary carrier 25 rotates. At the same time, when the catch tank 70 rotates, lubricating oil that tends to go outward in the radial direction by centrifugal force can be stored in the second oil storage section 82. As a result, when the planetary carrier 25 rotates, the lubricating oil can be more reliably supplied to the lubrication portion between the planetary shaft 30 and the planetary gear 24, and the lubrication can be more reliably performed regardless of the rotation state. be able to.

  Further, the outer opening 78 and the notch 79 are formed so as not to overlap when viewed in the vertical direction of the radial wall 73 or in the radial direction centered on the rotation center axis 65. Lubricating oil that has entered the catch tank 70 from the opening 78 can be prevented from slipping out of the notch 79, and lubricating oil that has entered the catch tank 70 from the notch 79 can be prevented from slipping out of the outer opening 78. As a result, the lubricating oil that has entered the catch tank 70 can be more reliably stored in the first oil storage portion 81 and the second oil storage portion 82, and the lubricating oil can be more reliably stored between the planetary shaft 30 and the planetary gear 24. Can be supplied to the lubrication part. As a result, it is possible to perform the lubrication more stably regardless of the rotation state.

  In addition, by forming the notch portion 79 at a predetermined distance from the protrusion 76, the lubricating oil is notched when the lubricating oil that has entered the catch tank 70 is accumulated in the first oil storage portion 81. The escape from the portion 79 can be suppressed, and the first oil storage portion 81 can store the lubricating oil more reliably. 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 columnar shape having a bottom surface in which the apex portion of the isosceles triangle is substantially semicircular, but the catch tank 70 is formed in other shapes. It may be. The catch tank 70 includes a first oil storage portion 81 that can store lubricating oil in a radial direction centered on the rotation center axis and a circumferential direction centered on the rotation center axis, and an outer surface in the radial direction. And a second oil storage part 82 that can be stored in the direction, and the lubricating oil stored in the first oil storage part 81 and the second oil storage part 82 can flow into the lubricating oil passage 31 of the planetary shaft 30. If there is, the shape does not matter.

  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 stored in the lubricating oil passage 31 formed in the planetary shaft 30 that supports the planetary gear 24 so as to rotate by the first oil storage portion 81 and the second oil storage portion 82. By providing the lubricating oil so that it can be supplied, the lubricating oil can be stably supplied to the lubricating portion between the planetary gear 24 and the planetary shaft 30 regardless of how many planetary gears 24 are provided.

  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 BB sectional drawing of FIG. It is CC arrow line view of FIG. It is a perspective view of the catch tank shown in FIG. It is explanatory drawing which shows the state which lubricating oil collected in the 2nd oil storage part. It is explanatory drawing which shows the state which lubricating oil accumulated in the 1st oil storage part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vehicle 3 Engine 5 Motor generator 6 1st motor generator 8 2nd motor generator 15 Drive device 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 Deceleration planetary gear 50 Deceleration mechanism 55 Differential device 61 Drive shaft 62 Drive wheel 65 Rotation center shaft 70 Catch tank 71 Outer wall portion 72 Shield plate 73 Radial wall portion 74 Slope wall portion 75 Cylindrical wall portion 76 Projection portion 77 Circumferential wall Portion 78 Outside opening 79 Notch portion 81 First oil storage portion 82 Second oil storage portion 90 Lubricating oil

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 lubricating oil passage is configured, and an introduction oil passage into which the lubricating oil is introduced,
It is connected to the rotating part and is provided so as to be rotatable integrally with the rotating part, and is radially inward centered on the rotation center axis rather than the center of the hole forming the introduction oil passage. A projecting portion located on the outer side and projecting outward in the radial direction, a radial wall portion that is at least a wall portion facing outward in the radial direction, and the projecting portion. comprises a a facing wall portion circumferentially wall portion, said lubricating oil, a first oil reservoir portion that can be accumulated in the circumferential direction of the inner and around the rotational axis before Ki径 direction, A second oil storage part capable of storing the lubricating oil outward in the radial direction, and allowing the lubricating oil stored in the first oil storage part or the second oil storage part to flow into the lubricating oil passage A catch tank that can
A planetary gear mechanism lubrication structure comprising: Furthermore, the catch tank has a first opening that opens outward in the radial direction,
A second opening that opens inward in the radial direction;
The lubricating structure for a planetary gear mechanism according to claim 1, comprising: The planet according to claim 2 , wherein the first opening, the second opening, and the first oil storage part are provided on both sides of the opening of the lubricating oil passage in the circumferential direction. Lubrication structure of gear mechanism. The planetary gear mechanism according to any one of claims 1 to 3 , wherein the second oil storage part is formed to protrude outward of the opening of the lubricating oil passage in the radial direction. Lubrication structure.

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