JP2007225009A - Lubricating oil feeding device of transmission - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To distribute the feeding oil amount according to the lubricating oil amount for a plurality of lubricating oil passages sharing a shaft end oil chamber. <P>SOLUTION: A lubricating oil feeding device of a transmission comprises a housing 3 to support a rotary shaft 20 and a rotary shaft, a lubricating oil passage 110 in a first shaft, having a first shaft end opening 115 at the shaft end surface of the rotary shaft and extending in the shaft, a lubricating oil passage 120 in a second shaft, having a second shaft end opening 125 at the shaft end surface and extending in the shaft end, and a shaft end oil chamber 130 formed between the housing 3 and the shaft end of the rotary shaft to cover a shaft end surface 20f. The lubricating oil feeding device of the transmission feeds the lubricating oil fed from an oil pressure feeding source into the shaft end oil chamber 130 via the lubricating oil passages in the first and second shafts to first and second portions (27, C2) to be lubricated on the rotary shaft 20. The first shaft end opening 115 and the second shaft end opening 125 are formed in the different radial positions in the axial direction of the rotary shaft 20. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention provides a lubrication for a transmission that supplies lubricating oil supplied from a hydraulic supply source to a shaft end oil chamber of a housing to a lubricated portion on the rotating shaft via an in-shaft lubricating oil passage formed on the rotating shaft. The present invention relates to an oil supply device.

  As a lubricating oil supply device for a transmission for supplying lubricating oil supplied to a shaft end oil chamber of a housing to a lubricated portion on a rotating shaft via an in-shaft lubricating oil passage, lubrication of an automatic transmission used in an automobile, for example There is an oil supply device. In an automatic transmission, a plurality of rotation shafts are provided between an input shaft and an output shaft of a transmission connected to an output shaft of an engine, and a transmission gear that forms a speed stage is provided on each rotation shaft. The transmission gear includes a fixed gear fixedly disposed on the rotation shaft by spline engagement, and a clutch gear that is rotatably supported by the rotation shaft via a bearing and is coupled to the rotation shaft by friction engagement of a multi-plate clutch. For example, a clutch gear coupled to a rotating shaft via a one-way clutch or a gear mechanism using a planetary gear is also used.

  In order to supply lubricating oil to lubricated parts such as multi-plate clutches, one-way clutches and bearings on the rotating shaft, a shaft end oil chamber is formed near the shaft end of the housing that supports the rotating shaft, A lubricating oil supply device that supplies lubricating oil through a drilled in-shaft lubricating oil passage is employed. In addition, a configuration in which a shaft end oil chamber is shared and a plurality of in-shaft lubricating oil passages are formed in accordance with the type of lubricating portion and the amount of lubricating oil has been put into practical use. As a means for introducing lubricating oil into the in-shaft lubricating oil passage, a lubricating oil supply device has been devised in which an inclined oil passage is formed so as to contact the in-shaft lubricating oil passage from the outer peripheral surface of the rotating shaft without passing through the shaft core. (For example, refer to Patent Document 1).

  The lubricating oil supplied to the shaft end oil chamber uses oil discharged from an oil pump that is connected to the input shaft of the transmission and is driven to rotate by the engine, and operates the multi-plate clutch and servo mechanism in the transmission. This is done via a hydraulic control device that controls In recent years, various hybrid vehicles have been devised that include a drive motor and a motor power transmission mechanism on the output shaft side of the transmission, and can travel with the rotational driving force of the drive motor while the engine is stopped. Such a hybrid vehicle is equipped with an electric oil pump that generates hydraulic pressure instead of the engine-driven oil pump while the engine is stopped, and the oil discharged from the electric oil pump is used as a motor drive mechanism and a shaft end oil chamber of the transmission. It is comprised so that it may be supplied to.

Japanese Utility Model Publication No. 61-1335060

  By the way, when the lubricating oil in the transmission becomes high temperature, the viscosity of the lubricating oil decreases, and the oil leakage in various control valves provided in the hydraulic control device and the consumption of the lubricating oil (hydraulic oil) in the hydraulic actuator in the transmission increase. As a result, a situation occurs in which the amount of lubricating oil supplied to the shaft end oil chamber decreases. In addition, the electric oil pump supplies the lubricating oil necessary for the motor power transmission mechanism when the engine is stopped and the lubricating oil necessary for ensuring the transmission function in response to the demand for reduction in size and weight of the transmission and reduction in power consumption. A small-sized oil pump that can be supplied is used, and the amount of lubricating oil supplied to the shaft end oil chamber is smaller than that when the engine-driven oil pump is operated.

  On the other hand, even in the lubricated parts provided on the same rotating shaft, depending on the lubricated parts that always need to be supplied with lubricating oil, the lubricated parts that are less likely to cause problems even if the amount of lubricating oil decreases, and the operating conditions There are various types of parts to be lubricated, such as almost no lubricating oil is required and a large amount of lubricating oil causes stirring resistance and leads to loss. For example, a one-way clutch is a shaft in which a roller (or sprag) as a fastening element is always in sliding contact with a rotating shaft, and the rotating shaft provided with the one-way clutch is driven and rotated even when the motor is running. In some cases, it is necessary to always supply lubricating oil regardless of engine running or motor running. On the other hand, the multi-plate clutch that forms the speed stage of the transmission is not frictionally engaged when the motor travels, and if the amount of lubricating oil supplied is large, it becomes a stirring resistance and causes a loss.

  However, in the conventional lubricating oil supply device, when a plurality of in-shaft lubricating oil passages are formed from the shaft end, these in-shaft lubricating oil passages are angled according to the number of arrangements around the axis of the rotating shaft. The pitch was formed on the same radius. For example, when forming two in-shaft lubricating oil passages, the in-shaft lubricating oil passage is formed at a 120-degree pitch when forming three in-shaft lubricating oil passages. The shaft end openings of the oil passages are arranged side by side on the same radius. For this reason, when the amount of lubricating oil supplied to the shaft end oil chamber decreases, the amount of lubricating oil supplied to all lubricated parts on the rotating shaft similarly decreases, and a one-way clutch that requires a sufficient amount of oil There was a risk that the amount of lubricating oil would be insufficient in the parts to be lubricated. On the other hand, there has been a problem that a multi-plate clutch that requires almost no lubricating oil when the motor is running is supplied with the same amount of lubricating oil as when the engine is running, resulting in a stirring resistance and an increase in power consumption. Such a problem has been considered difficult to solve for a plurality of in-shaft lubricating oil passages that receive lubricating oil from the same shaft end oil chamber.

  The present invention has been made in view of the above circumstances, and supplies a plurality of in-shaft lubricating oil passages sharing a shaft end oil chamber according to the amount of lubricating oil supplied to the shaft end oil chamber. It is an object of the present invention to provide a lubricating oil supply device for a transmission capable of distributing an oil amount.

  In order to achieve the above object, the present invention provides a rotating shaft (for example, the secondary shaft 20 in the embodiment), a housing (for example, the transmission case 3 in the embodiment) that rotatably supports the rotating shaft, and the shaft of the rotating shaft. A first shaft hole having a first shaft end opening on the end surface and extending into the shaft of the rotation shaft, and a first lubrication hole communicating with the first shaft hole and connected to the first lubricated portion on the rotation shaft. A first shaft lubricating oil passage, a second shaft hole having a second shaft end opening on the shaft end surface and extending into the shaft of the rotating shaft, and a second lubricated portion on the rotating shaft communicating with the second shaft hole Between the housing and the shaft end portion of the rotary shaft, and is formed so as to cover the shaft end surface through the first and second shaft end openings. And a shaft end oil chamber communicating with the first and second in-shaft lubricating oil passages from the hydraulic supply source to the shaft end oil chamber. The supplied lubricating oil is supplied to the first and second lubricated parts (for example, the one-way clutch 27 and the second speed clutch C2 in the embodiment) on the rotating shaft via the first and second in-shaft lubricating oil passages. In the lubricating oil supply device for a transmission, the first shaft end opening and the second shaft end opening are formed at different radial positions in the radial direction of the rotating shaft.

  The first shaft end opening and the second shaft end opening are the first or second lubricated parts having a relatively large amount of required oil according to the required amount of oil of the first lubricated part and the second lubricated part. Forming a lubricating oil supply device by forming the shaft end opening of the portion closer to the outer peripheral side in the radial direction of the rotating shaft than the shaft end opening of the second or first lubricated portion with a relatively small amount of required oil desirable.

  In the present invention, for a plurality of in-shaft lubricating oil passages sharing the shaft-end oil chamber, the first shaft end opening of the first in-shaft lubricating oil passage that guides the lubricating oil to the first lubricated portion, and the second covered oil passage. The second shaft end opening of the second in-shaft lubricating oil passage that guides the lubricating oil to the lubricating portion is formed at different radial positions in the radial direction of the rotating shaft to constitute the lubricating oil supply device. According to such a configuration, when the amount of lubricating oil supplied to the shaft end oil chamber is small, the lubricating oil rotated along with the rotation of the rotating shaft in the shaft end oil chamber is biased radially outward by centrifugal force. The shaft end opening flows into an in-shaft lubricating oil passage (for example, a first in-shaft lubricating oil passage) located radially outside, and enters a lubricated portion (the first lubricated portion) that is connected to the in-shaft lubricating oil passage. Supplied with priority. When the amount of lubricating oil supplied to the shaft end oil chamber increases, the inner diameter of the rotating fluid surface decreases, and the shaft end opening also flows into the in-shaft lubricating oil passage (for example, the second in-shaft lubricating oil passage) located radially inward. Thus, the oil is supplied to the lubricated portion (second lubricated portion) connected to the in-shaft lubricating oil passage. That is, the flow rate can be distributed according to the amount of lubricating oil supplied to the shaft end oil chamber for the plurality of in-shaft lubricating oil passages sharing the shaft end oil chamber.

  Then, for example, the one-way clutch in the above-described case, the shaft end opening of the lubricating oil passage for the lubricated portion with a large amount of required oil is formed on the outside in the radial direction, and lubrication for the lubricated portion with a relatively small required flow rate is performed. By forming the shaft end opening of the oil passage radially inward, even when the amount of lubricating oil supplied to the shaft end oil chamber decreases, the lubricating oil is preferentially supplied to the lubricated part where the required amount of oil is large. Wear and the like due to a decrease in the amount of lubricating oil can be prevented. Further, in a hybrid vehicle capable of running on a motor with the engine stopped, a shaft end opening of a lubricating oil passage for a portion to be lubricated that requires lubricating oil is formed radially outward even when the motor is running. By forming the shaft end opening of the lubricating oil path radially inward with respect to the lubricated part, which is not frictionally engaged when the motor is running like a multi-plate clutch, and instead has a stirring resistance when the amount of lubricating oil is large In addition, loss due to stirring resistance can be reduced while preventing wear and the like due to a decrease in the amount of lubricating oil.

  Therefore, according to the present invention, with respect to a plurality of in-shaft lubricating oil passages sharing the shaft end oil chamber, the amount of oil supplied according to the amount of lubricating oil supplied to the shaft end oil chamber when the amount of lubricating oil decreases. The transmission lubricating oil supply device can be provided, and the transmission lubricating oil supply device capable of supplying the lubricating oil according to the priority order of the parts to be lubricated can be provided with a simple configuration. Can be provided.

  Hereinafter, preferred embodiments for carrying out the present invention will be described with reference to the drawings. FIG. 2 shows a representative sectional view of a power transmission device to which the present invention is applied, and FIG. 3 shows a skeleton diagram of the power transmission device including a motor drive mechanism. First, referring to these drawings, the power transmission device 1 The overall configuration will be described. In FIG. 2, only the main rotating shaft such as the main shaft and the transmission case are hatched in order to avoid complication of the drawing.

  The power transmission device 1 includes an engine ENG, an automatic transmission (hereinafter referred to as a transmission) 2 connected to the engine output shaft ES via a torque converter TC, and a first drive disposed on the axle side of the transmission 2. The motor M1, the second drive motor M2 and the like disposed between the transmission 2 and the engine ENG are provided, and the rotational driving force of the engine ENG is transmitted to the left and right drive wheels WL and WR via the transmission 2. And drive the vehicle. The first drive motor M1 and the second drive motor M2 are electric motor / generators that are driven by a vehicle-mounted battery to assist the drive force of the engine ENG, or can run with the drive force of the motor when the engine is stopped. In addition, it is possible to charge the battery by generating electric power when the engine is running or when decelerating. That is, the drive source of the power transmission device is composed of the engine ENG and the drive motors M1 and M2, and is of a hybrid type.

  The transmission 2 is a parallel shaft type of a forward fifth speed and a reverse first speed that are controlled in speed by controlling the hydraulic pressure generated by a first oil pump P1 or a second oil pump P2 (see FIG. 4) described later. A main shaft 10 that is a speed change mechanism and is connected to a crankshaft ES of the engine ENG via a torque converter TC having a lockup mechanism LC, and extends parallel to the main shaft 10 and includes a plurality of gears. A secondary shaft 20, a third shaft 30, and a counter shaft 40 connected to the main shaft 10 via a row are provided and disposed inside the transmission case 3.

  A main third speed gear 13 is coupled to the main shaft 10, and a main fourth speed gear 14, a main fifth speed gear 15, and a main reverse gear 16 integrally connected to the main fifth speed gear 15 are relatively rotated. Arranged freely. Further, the main shaft 10 includes a main speed gear C4, a main speed gear 15, and a main reverse gear 16 integrated with the main speed gear C4, which are coupled to the main shaft 10 and a main fourth speed gear 14 disposed in a relatively rotatable manner. A 5-speed clutch C5 to be coupled to the vehicle 10 is provided.

  A secondary first speed gear 21 and a secondary second speed gear 22 are rotatably disposed on the secondary shaft 20, and a secondary idle gear 23 is coupled to the secondary shaft 20. The secondary shaft 20 has a first-speed clutch C1 that couples a secondary first-speed gear 21 disposed so as to be relatively rotatable to the secondary shaft 20 via a one-way clutch 27, and the secondary first-speed gear 21 that passes the one-way clutch 27. There are provided a first-speed hold clutch CL that is directly coupled to the secondary shaft 20 and a second-speed clutch C2 that is coupled to the secondary shaft 20 with a secondary second-speed gear 22 disposed so as to be relatively rotatable.

  A third third-speed gear 33 that meshes with the main third-speed gear 13 is disposed on the third shaft 30 so as to be relatively rotatable. A third fourth-speed gear 34 that meshes with the main fourth-speed gear is coupled and disposed. A third speed clutch C3 is provided for coupling a freely disposed third third speed gear 33 to the third shaft.

  The counter shaft 40 is coupled with a counter first speed gear 41 that meshes with the secondary first speed gear 21, a counter second speed gear 42 that meshes with the secondary second speed gear 22, and a counter fourth speed gear 44 that meshes with the main fourth speed gear 14. Arranged. The counter shaft 40 has a counter reverse gear 43 that meshes with the main third speed gear 13 and the secondary idle gear 23, a counter fifth speed gear 45 that meshes with the main fifth speed gear 15, and a main reverse gear via a reverse idle gear 36. Counter reverse gears 46 that mesh with the gears 16 are disposed so as to be relatively rotatable.

  A reverse selector 47 using a dog-tooth mechanism is provided between the counter fifth gear 45 and the counter reverse gear 46 on the counter shaft 40, and the selector sleeve 47s is moved in the axial direction by a servo actuator (not shown). Thus, the counter fifth gear 45 can be coupled to the counter shaft 40 or the counter reverse gear 46 can be coupled to the counter shaft 40.

  In the transmission 2 configured as described above, when the first speed clutch C1 is engaged and the secondary first speed gear 21 is coupled to the secondary shaft 20, the rotation of the main shaft 10 causes the main third speed gear 13, the counter idle gear 43, A first gear stage that is transmitted to the countershaft 40 via a first gear train including the secondary idle gear 23, the secondary first gear 21, and the counter first gear 41 is set. At the first speed stage in which the first speed clutch C1 is engaged, the secondary first speed gear 21 is coupled to the secondary shaft 20 via the one-way clutch 27, so that the one-way clutch 27 does not slide and decelerate suddenly when the accelerator is turned off. It is like that. On the other hand, although the gear train is the same in the first-speed hold stage where the first-speed hold clutch CL is engaged, the secondary first-speed gear 21 is directly coupled to the secondary shaft 20 without the one-way clutch 27, so The engine brake can be activated.

  When the second speed clutch C2 is engaged and the secondary second speed gear 22 is coupled to the secondary shaft 20, the rotation of the main shaft 10 causes the main third speed gear 13, the counter idle gear 43, the secondary idle gear 23, and the secondary second speed gear 22 to rotate. , And a second speed stage that is transmitted to the counter shaft 40 via a second speed gear train including the counter second speed gear 42 is set. Similarly, when the third speed clutch C3 is engaged and the third third speed gear 33 is coupled to the third shaft 30, the rotation of the main shaft 10 causes the main third speed gear 13, the third third speed gear 33, the third fourth speed gear 34, A third speed that is transmitted to the countershaft 40 via a third speed gear train including the main fourth speed gear 14 and the counter fourth speed gear 44 is set. Further, when the fourth speed clutch C4 is engaged, the rotation of the main shaft 10 is transmitted to the counter shaft 40 through the fourth speed gear train composed of the main fourth speed gear 14 and the counter fourth speed gear 44. Is set.

  On the other hand, when the main 5-speed gear 15 and the main reverse gear 16 integrally formed by engaging the 5-speed clutch C5 are coupled to the main shaft 10, the counter 5-speed where the rotation of the main shaft 10 meshes with these gears. It is transmitted to the gear 45 and the counter reverse gear 46. However, the counter 5-speed gear 45 and the counter reverse gear 46 are disposed so as to be relatively rotatable with respect to the counter shaft 40, and are selectively engaged with and disengaged from the counter shaft 40 according to the operation of the reverse selector 47.

  That is, when the selector sleeve 47s is moved rightward in FIG. 3 by a servo actuator (not shown) and the counter 5-speed gear 45 is coupled to the counter shaft 40, the rotation of the main shaft 10 causes the main 5-speed gear 15 and the counter 5-speed to rotate. A fifth speed stage that is transmitted to the countershaft 40 via a fifth speed gear train including the gear 45 is set. On the other hand, when the selector sleeve 47 s is moved to the left in FIG. 3 and the counter reverse gear 46 is coupled to the counter shaft 40, the rotation of the main shaft 10 starts from the main reverse gear 16, the reverse idle gear 36, and the counter reverse gear 46. The reverse speed transmitted to the countershaft 40 through the reverse gear train is set.

  As described above, by the engagement control of the 1st speed, 2nd speed, 3rd speed, 4th speed, 5th speed clutch C1 to C5 and 1st speed hold clutch CL and the movement control of the selector sleeve 47s of the reverse selector 47 by the servo actuator. First to fifth, first-speed hold, and reverse speed are set, and the rotation of the main shaft 10 is transmitted to the countershaft 40 via each gear train. The rotation of the countershaft 40 is transmitted to the differential mechanism DF via a final drive gear 48 coupled to the countershaft 40 and a final driven gear 58 meshing with the final drive gear 48, and then via the left and right axle shafts. It is transmitted to the left and right drive wheels WL, WR.

  On the other hand, a motor power transmission mechanism 5 that transmits the rotational driving force of the first drive motor M1 to the drive wheels is disposed on the axle side of the transmission 2. The motor power transmission mechanism 5 is provided in the upper part of the transmission 2, and is connected to a spindle of the first drive motor M1, a motor drive gear 51 that meshes with the motor drive gear 51, and a motor secondary shaft. 50, a secondary driven gear 53 that meshes with the motor idler gear 52, a secondary drive gear 54 that is relatively rotatably disposed on the motor secondary shaft 50, and a secondary drive gear 54 that is coupled to the motor counter shaft. A counter driven gear 55 that meshes with the motor counter shaft, a motor final drive gear 56 that meshes with the final driven gear 58, a sync clutch 57 that couples the secondary drive gear 54 to the motor secondary shaft, and the like.

  The sync clutch 57 moves the sync sleeve 57s in the axial direction by a servo actuator (not shown) to couple the secondary drive gear 54 to the motor secondary shaft 50, or to disconnect the secondary drive gear 54 and the motor secondary shaft 50 from each other. Be able to. Therefore, when the synchro clutch 57 is engaged, the rotation of the first drive motor M1 causes the motor drive gear 51, the motor idler gear 52, the secondary driven gear 53 and the secondary drive gear 54, the counter driven gear 55, and the motor final drive gear. It is transmitted to the differential mechanism DF via the final driven gear 58 via the motor gear train consisting of 56, and to the left and right drive wheels WL and WR via the left and right axle shafts.

  Therefore, in this hybrid vehicle, the engine in the idling stop state (cylinderless state) can be started using the second drive motor M2 as a starter of the engine ENG, and the engine driving force is assisted to drive the engine ENG. The vehicle can be driven at the speed stage set in 2. Further, the engine ENG is stopped and the clutch C1 to C5 and CL in the transmission are disengaged, and the synchro clutch 57 of the motor power transmission mechanism 5 is engaged so that the first drive motor M1 can run the motor. It has become. The operation control of the servo actuator of the synchro clutch 57 and the lubrication of each part of the motor power transmission mechanism 5 are performed by the lubricating oil supplied from the hydraulic control device 7 similarly to the transmission 2.

  The hydraulic control device 7 includes a first oil pump P1 that is provided on the input shaft side of the torque converter TC and is rotationally driven by the engine ENG, and a second oil pump that is rotationally driven by an electric motor using electric power of a battery (not shown). P2 and a plurality of oils for guiding the lubricating oil discharged from these oil pumps P1 and P2 to lubricating parts such as hydraulic actuators (C1 to C5, CL, reverse selector 47, synchro clutch 57 servo actuator, etc.) and bearings. These hydraulic control valves and the oil passages connecting these are controlled by the control unit ECU and the operation of the second oil pump P2 and the respective hydraulic control valves.

  The control unit ECU has a detection signal for detecting a traveling state such as a shift position selection signal, a throttle opening signal, a vehicle traveling speed or an inclination angle selected by the driver in a shift lever device provided in the driver's seat. The control unit ECU outputs control signals based on these signals to the hydraulic control device 7 to control the operation of the first to fifth clutches C1 to C5, etc., and the first drive motor M1, the first A control signal is output to the two-drive motor M2 to control the operation of each drive motor. As a result, the transmission 2 is automatically shifted according to the selected shift position, and driving force assist using the first and second drive motors M1 and M2, driving of the motor, and charging of the battery are performed.

  Now, in the power transmission device 1 schematically configured as described above, the present invention is applied to a lubricating oil supply device that supplies lubricating oil to the lubricated portion of the secondary shaft 20. FIG. 4 shows a main configuration of a lubrication circuit in the hydraulic control device 7.

  The lubricating circuit includes a first oil pump P1 driven by the engine ENG, a second oil pump P2 driven by the electric motor M5, a regulator valve 81 for regulating the lubricating oil discharged from these oil pumps, and an oil for the lubricating oil. An oil temperature adjusting device 85 for adjusting the temperature, an oil reservoir 90 provided in the middle of an oil passage returning from the oil temperature adjusting device to the oil pan, and lubricating oil discharged from the oil pump to each lubricated portion of the power transmission device 1 It is composed of an oil passage for guiding.

  The first oil pump P1 is connected to a first discharge oil passage 71 for discharging lubricating oil sucked from an oil pan T provided with a strainer, and is connected to two input ports 81a and 81b of the regulator valve 81. An oil passage 74 branched from the first discharge oil passage 71 is connected to a hydraulic circuit of a transmission control system that controls the operation of each hydraulic actuator (C1 to C5, CL, reverse selector 47, synchro clutch 57 servo actuator, etc.). ing.

The regulator valve 81 includes a spool that is slidable in the axial direction inside the valve body, and a spring that urges the spool to the left in the figure, and includes first and second input ports 81a and 81b. , A pressure regulating valve having first and second output ports 81c and 81d. The spool is formed with an internal oil passage that penetrates the leftmost land portion and introduces signal pressure into the reaction oil chamber, and the spool is moved to the right according to the oil pressure of the lubricating oil supplied to the first input port 81a. To adjust the oil pressure of the first discharge oil passage 71 and the oil pressure of the oil passage 74 branched from the first discharge oil passage. The set pressure of the regulator valve 81 is set to about 9.5 kgf / cm ² , for example.

  The first output port 81 c of the regulator valve is connected to the oil pressure circuit of the torque converter system through the oil passage 75, and is connected to the oil temperature adjusting device 85 through the oil passage 77. A filter 86 is provided on the downstream side of the oil temperature adjusting device 85 and is connected to the oil reservoir 90, and the lubricating oil overflowing from here returns to the oil pan T at the lower end of the transmission case via the return oil path 95. ing. The oil sump 90 is formed in the gear box of the motor power transmission mechanism 5 disposed in the upper part of the transmission 2 in a liquid level open form, and is driven by a motor via an oil passage 91 connected to the oil sump 90. While being connected to the lubricated portion 60 of the mechanism 5, it is also connected to the lubricated portion 64 of the secondary shaft 20 via the oil passage 92. A cooler check valve 84 is provided in the oil passage 75.

  An oil passage 93 is connected to the second output port 81d of the regulator valve. A relief valve 87 and a lubrication control valve 88 are connected to the oil passage 93 and branched from the middle to be divided into a plurality of oil passages 93a, 93b, 93c, 93d, and 93e. 61-65. Here, the lubricated parts 61 to 65 are the meshed part 61 of the final drive gear 48, the lubricated parts 62 such as the clutches C4 and C5 and the bearings disposed on the main shaft 10, and the lubricated parts such as the bearings on the counter shaft 40. Part 63, clutches C1, CL, 27, and C2 on secondary shaft 20 and lubricated part 64 such as a bearing, clutch C3 on third shaft 30 and lubricated part 65 such as a bearing, and a lubricated part on the rotating shaft Is supplied with lubricating oil through an in-shaft lubricating oil passage provided in each shaft.

  The oil passage 93 d is joined to the oil passage 92 connected to the oil reservoir 90 and connected to the lubricated portion 64 of the secondary shaft 20 through the oil passage 134, and is supplied from the oil reservoir 90 through the oil passage 92. The common lubricated portion is capable of both supplying the lubricating oil and supplying the lubricating oil directly led from the oil pump through the oil passage 93. For this reason, the oil passage 92 is allowed to flow down due to gravity in the direction of the lubricated portion 64 of the secondary shaft from the oil reservoir 90 side, and the lubricating oil flows backward from the oil passage 93d toward the oil reservoir 90. A check valve 94 is provided to prevent it. In addition, the oil passage 93d passes through a height position between the oil reservoir 90 and the in-axis lubricating oil passage of the secondary shaft 20, and the backflow of the lubricating oil from the oil passage 92 side to the oil passage 93d direction is caused by the height difference. The suppressed water head difference forming portion 93h is formed. A lubrication check valve 89 is provided between the oil passage 93d and the oil passage 93e.

On the other hand, the second oil pump P2 is connected to the second discharge oil passage 72 for discharging the lubricating oil sucked from the oil pan T, connected to the relief valve 82, and connected to the oil passage 77 through the oil passage 76. Yes. The second discharge oil passage 72 is connected to the first discharge oil passage 71 via an oil passage 73 that branches in the middle. The oil passage 73 is provided with a check valve 73c so as not to flow in the direction of the second discharge oil passage 72 from the first discharge oil passage 71 side. The set pressure of the relief valve 82 is set to a pressure lower than the set pressure of the regulator valve 81, for example, about 3 kgf / cm ² in accordance with the discharge pressure of the second oil pump P2, which is a relatively low discharge pressure.

  Therefore, the high-pressure lubricating oil discharged from the first oil pump P1 to the first discharge oil passage 71 when the engine is driven does not flow in the direction of the oil passage 72 through the oil passage 73 and the oil passages 75 and 76. The lubricating oil discharged from the second oil pump P2 when the engine is stopped is supplied to the hydraulic circuit of the transmission control system via the oil passages 73 and 74, and the oil temperature adjusting device 85 via the oil passages 76 and 77. Is supplied to the oil reservoir 90, and the lubricating oil flowing down from the oil reservoir 90 due to gravity passes through the oil passage 91 through the lubricated portion 60 and the oil passages 92 and 134 of the motor power transmission mechanism 5. To the lubricated portion 64 of the secondary shaft 20.

  Now, in such a lubricating circuit configuration, the lubricating oil supply device according to the present invention is applied to a lubricating oil supply structure that guides the lubricating oil to the lubricated portion of the secondary shaft 20. FIG. 5 shows an enlarged cross-sectional view of the vicinity of the secondary shaft 20 in FIG. 2. First, the lubricating oil supply apparatus 100 of the first embodiment will be described.

  The secondary shaft 20 is rotatably supported by the transmission case 3 by ball bearings and roller bearings, and a secondary idle gear 23 is coupled and disposed on the shaft by spline fitting. The first gear C1 and the second first gear 21 are connected to the secondary shaft 20 via the one-way clutch 27, and the first gear 21 is supported by the speed gears 22 via needle roller bearings. A first-speed hold clutch CL that is directly coupled to the secondary shaft 20 without using the one-way clutch 27 and a second-speed clutch C2 that couples the secondary second-speed gear 22 to the secondary shaft 20 are provided.

  That is, on the secondary shaft 20, there are a first speed clutch C1, a first speed hold clutch CL, and a second speed clutch C2 as hydraulic control targets, and the clutch, the one-way clutch 27, and the needle as the lubricated portion 64 that is a lubrication target. There are bearings such as roller bearings. Therefore, in the shaft of the secondary shaft 20, shaft holes are formed from both the left and right ends to form an in-shaft oil passage.

  Among these, the left end side in-shaft oil passage in FIG. 5 is an in-shaft control pressure oil passage for supplying control oil pressure (clutch pressure) to the first speed clutch C1 or the first speed hold clutch CL. The axial hole extending in the axial direction is located at the axial center of the secondary shaft 20 and is formed in a stepped shape with a thin front end side and a thick middle portion from the left end side, and extends radially from the front end portion of the shaft hole toward the first speed clutch C1. A control pressure supply hole and a control pressure supply hole extending radially from the shaft hole intermediate portion toward the first speed hold clutch CL are formed.

  On the other hand, in the transmission case 3 on the left end side of the shaft, a left shaft end outer oil chamber 176 and a right shaft end side oil chamber 177 are formed with a retainer ring 175 attached to the shaft end outward. A first-speed clutch pressure-shaft oil passage 171 connected to the first-speed clutch from the shaft end outer oil chamber 176 through the pipe interior by a pipe 178 extending from the retainer ring 175 through the center of the shaft hole to the tip, and the shaft end side A first-speed hold clutch pressure shaft oil passage 172 is formed from the partial oil chamber through the outer peripheral side of the pipe and connected to the first-speed hold clutch CL.

  For this reason, when the control oil pressure is supplied from the hydraulic control device 7 to the shaft end outer oil chamber 176 based on the command signal from the control unit, the control oil pressure is changed to the first speed clutch via the first speed clutch pressure shaft oil passage 171. The first speed clutch C1 is frictionally engaged and the secondary first speed gear 21 is coupled to the secondary shaft 20 via the one-way clutch 27. When the control oil pressure is supplied from the hydraulic control device 7 to the shaft end side oil chamber 177, the control oil pressure is supplied to the first speed hold clutch CL via the first speed hold clutch pressure oil passage 172, and the first speed hold clutch CL is supplied. Clutch CL is frictionally engaged, and secondary first gear 21 is directly coupled to secondary shaft 20.

  On the right end side of the secondary shaft is a second speed clutch pressure shaft oil passage 180 for supplying control oil pressure (clutch pressure) to the second speed clutch C2, and a first shaft for supplying lubricating oil to the lubricated portion on this shaft. A lubricating oil passage 110 and a second in-shaft lubricating oil passage 120 are provided. Of these, the second-speed clutch pressure shaft oil passage 180 is positioned radially at the shaft center of the secondary shaft 20 and extends inward in the axial direction, and radially from the tip of the shaft hole toward the second-speed clutch C2. The control pressure supply hole 182 that extends, the control pressure introduction hole 183 that extends radially from the middle portion on the right end side of the shaft hole toward the outer periphery of the shaft, and the control pressure introduction groove that is formed in a ring groove shape at the opening position of the control pressure introduction hole 183 Etc. The right end of the shaft hole is hermetically sealed by press-fitting a plug 186 into the opening on the right end surface of the shaft.

  In the transmission case 3 in the vicinity of the right end of the shaft, a side introduction oil passage 188 is formed in alignment with a control pressure introduction groove formed on the outer peripheral surface of the secondary shaft 20, which is supplied from the hydraulic control device 7. Fast clutch pressure is supplied. Therefore, when the control oil pressure is supplied from the hydraulic control device 7 to the side introduction oil passage 188 based on the command signal from the control unit, the control oil pressure is supplied to the second speed clutch C2 via the oil passage in the second speed clutch pressure shaft. Then, the second speed clutch C2 is frictionally engaged, and the secondary second speed gear 22 is coupled to the secondary shaft 20.

  The first in-shaft lubricating oil passage 110 has a first shaft hole 111 having a first shaft end opening 115 that opens to the shaft end surface of the secondary shaft 20 and extends inward in the axial direction along the axis, and the first shaft hole 111. The first lubrication hole 112 is connected to the inner periphery of the boss portion of the secondary first speed gear 21 and communicates with the shaft outer peripheral direction, and the lubricating oil groove 113 formed in a ring groove shape at the opening position of the first lubrication hole 112. Is done. A plurality of lubricating oil supply holes 114 that are aligned with the lubricating oil groove 113 and extend in the radial direction are formed in the boss portion of the secondary first speed gear 21 and connected to the one-way clutch 27.

  The second in-axis lubricating oil passage 120 has a second shaft hole 121 that has a second shaft end opening 125 that opens to the shaft end surface of the secondary shaft 20 and extends inward in the axial direction along the axis, and the second shaft hole. Each bearing inner peripheral portion on the secondary shaft 20 that communicates and extends in the outer peripheral direction of the shaft, and a plurality of second lubrication holes 122 connected to the friction engagement portion of the second speed clutch C2 are configured.

Here, as shown in FIG. 1, a side view of the right end portion of the secondary shaft 20 viewed in the direction of arrows I-I in FIG. 5, the first shaft hole 111 of the first in-shaft lubricating oil passage 110, The second shaft hole 121 of the two-shaft lubricating oil passage is that the first shaft hole 111 is formed radially outward from the second shaft hole 121 in the radial direction of the secondary shaft 20, and the first shaft end The opening 115 is located on the radially outer side with respect to the second shaft end opening 125 and opens. That is, the position radius R ₁ of the first axial end opening 115, the position radius of the second axial end opening 125 is taken as R _2, it is configured to have a relationship of R _1> R _2.

  On the other hand, at the right end portion of the secondary shaft 20, the inner wall surface of the transmission case 3 is formed in a bottomed cylindrical shape somewhat larger than the outer shape of the shaft end portion with a predetermined interval from the right end surface of the secondary shaft 20. A disc-shaped shaft end oil chamber 130 is formed between the right end surface of the shaft 20 and covers the shaft end surface. The shaft end oil chamber 130 is connected to the oil passage 134 where the oil passage 92 and the oil passage 93d described above are joined, and the shaft center is formed on the inner wall surface of the transmission case 3 facing the shaft end surface 20f of the secondary shaft 20. Lubricating oil is supplied from an oil passage opening 135 that is offset in the radial direction to the shaft end surface 20f.

  That is, the first in-shaft lubricating oil passage 110 and the second in-shaft lubricating oil passage 120 are connected to the shaft end oil chamber 130 via the first shaft end opening 115 and the second shaft end opening 125 that open into the shaft end oil chamber 130. The lubricating oil supplied from the hydraulic pressure supply source (the first oil pump P1 or the second oil pump P2) to the shaft end oil chamber 130 via the oil passage 134 is communicated with the first in-shaft lubricating oil passage 110 and The oil is supplied to each lubricated portion on the secondary shaft 20 through the second in-axis lubricating oil passage.

  In the lubricating oil supply apparatus 100 configured as described above, when the engine ENG is driven and the first oil pump P1 is operating, the lubricating oil discharged from the first oil pump P1 passes through the first discharge oil passage 71. Is supplied to the first and second input ports 81a and 81b of the regulator valve 81, and the lubricating oil regulated by the pressure regulating function of the regulator valve 81 is supplied to the hydraulic circuit of the transmission control system via the oil passage 74. Is done. In addition, the lubricating oil discharged to the second output port 81d out of the lubricating oil discharged in accordance with the pressure regulating action of the regulator valve 81 passes through the oil passage 93 through the divided oil passages 93a to 93e and is to be lubricated in each part of the transmission. The lubricating oil supplied to 61 to 65 and discharged to the first output port 81c is supplied to the motor power transmission mechanism 5 via the control hydraulic circuit of the torque converter, the oil temperature adjusting device 85, the oil sump 90, and the oil passage 91. Supplied to the lubricated part 60.

  The oil reservoir 90 is connected to the shaft end oil chamber 130 (the lubricated portion 64 on the secondary shaft) of the secondary shaft through the oil passage 92 and the oil passage 134, but when the first oil pump P1 is operated, 1 The check valve 94 is closed because the internal pressure of the oil passage 93d through which the lubricating oil discharged from the oil pump P1 is guided is higher than the internal pressure of the oil passage 92 using gravity based on the height difference from the oil reservoir. The lubricating oil is not supplied from the oil reservoir 90 to the shaft end oil chamber 130.

  The lubricating oil guided to the right end portion of the secondary shaft through the oil passage 93d and the oil passage 134 flows from the oil passage opening 135 formed in the shaft end oil chamber 130 toward the shaft end surface 20f of the secondary shaft 20, Normally, the shaft end oil chamber 130 is filled with a predetermined oil chamber pressure. For this reason, the filled lubricating oil flows into the first in-shaft lubricating oil passage 110 and the second in-shaft lubricating oil passage 120 from the first shaft end opening 115 and the second shaft end opening 125 that open into the oil chamber, The two-way clutch C2 is supplied to the one-way clutch 27 from the first lubricating hole 112 of the first in-shaft lubricating oil passage 110, passes through the plurality of second lubricating holes of the second in-shaft lubricating oil passage 120, and each of the shafts on the shaft. Supplied to the bearing.

  As is apparent from the skeleton diagram shown in FIG. 3, the rotational driving force of the engine ENG is transmitted through the gear train of the main third speed gear 13, the counter idle gear 43, and the secondary idle gear 23 during engine driving. The secondary shaft 20 is driven to rotate. For this reason, the centrifugal force acts on the lubricating oil flowing through the first shaft hole 111 and the second shaft hole 121 that are formed by being radially offset from the shaft center, and the oil chamber pressure acting on the shaft end oil chamber 130 is low. Even in this case, the lubricating oil is supplied so as to be sucked out from the lubricating holes 112 and 122.

  Here, when the temperature of the lubricating oil becomes high and the viscosity of the lubricating oil decreases, oil leakage increases between the valve body and the spool in various control valves of the transmission control system provided in the hydraulic control device 7, and the servo valve As a result, an oil leak or a consumption amount of the lubricating oil in the hydraulic actuator increases, and the amount of the lubricating oil supplied from the regulator valve 81 to the shaft end oil chamber 130 via the oil passage 93d decreases. On the other hand, the lubricating oil supplied into the shaft end oil chamber 130 is supplied to each lubricated portion so as to be sucked out by the action of the centrifugal force described above. Accordingly, when the amount of lubricating oil supplied to the shaft end oil chamber 130 decreases and becomes less than the amount of lubricating oil consumed by each lubricated portion, the shaft end oil chamber 130 becomes not filled with the lubricating oil.

  Under such circumstances, the lubricating oil that has flowed into the shaft end oil chamber 130 from the oil passage opening 135 toward the shaft end surface 20f of the secondary shaft 20 is rotated by contact with the shaft end surface of the rotating secondary shaft, and is centrifuged. An annular liquid level distribution biased outward in the radial direction of the secondary shaft by the force and biased toward the outer peripheral side of the shaft end oil chamber 130 is obtained. The liquid level distribution when the flow rate of the lubricating oil supplied to the shaft end oil chamber 130 is changed is shown in FIGS.

When the flow rate of the lubricating oil supplied to the shaft end oil chamber 130 is small, a liquid level distribution S ₁ such that the supplied lubricating oil sticks to the outer peripheral wall surface of the shaft end oil chamber 130 as shown in FIG. Become. Here, as described above, the two shaft end openings that open to the shaft end oil chamber 130 are opened such that the first shaft end opening 115 is positioned radially outward from the second shaft end opening 125. . Therefore, in the state of the liquid surface distribution S ₁ shown in (a) FIG, it flows into the first-shaft lubricating oil passage 110 without lubricant shaft end oil chamber flows into the second in-shaft lubricant passage 120, The oil is supplied to the one-way clutch 27 from the first lubrication hole 112 at the tip of the oil passage. That is, when the supply amount of the lubricating oil amount to the shaft end oil chamber 130 is small, the lubricating oil is always preferentially supplied to the one-way clutch 27 that is a portion to be lubricated that requires constant lubrication on the shaft. Therefore, even when the amount of lubricating oil decreases, wear of the one-way clutch 27 can be prevented.

  The oil passage opening 135 is formed so as to be offset radially outward from the shaft center, and is configured so that the lubricating oil flows toward the shaft end surface 20f of the secondary shaft 20 (see FIG. 1). As the shaft 20 rotates, the lubricating oil is intermittently supplied also to the second lubricating oil passage 120 when the second shaft end opening 125 passes in front of the oil passage opening 135 and supplied to the lubricated portion such as a bearing. It has become so.

When the flow rate of the lubricating oil supplied to the shaft end oil chamber 130 increases from the state shown in FIG. 5A and reaches the state of the liquid level distribution S ₂ shown in FIG. The lubricating oil flows into the second in-shaft lubricating oil passage 120 located in the plane, and the second-speed clutch C2 and the bearings of the respective portions from the second lubricating holes 122 formed in the respective portions of the second in-shaft oil passage. Will be supplied to. However, as is clear from comparison of the wetted area of the axial end opening 115 and 125 for the liquid surface distribution S _2, the amount of lubricating oil flowing in the shaft lubricating oil passage is much better of the first shaft in the lubricating oil passage 110, A relatively large amount of lubricating oil is supplied to the one-way clutch 27 that requires a relatively large amount of lubricating oil than a bearing or the like.

When the flow rate of the lubricating oil supplied to the shaft end oil chamber 130 is further increased and the liquid level distribution S ₃ shown in FIG. 5C is reached, both the first shaft end opening 115 and the second shaft end opening 125 are opened. As a whole, the oil is located in the rotating liquid surface, and the lubricating oil flowing into the first and second lubricating oil passages 110 and 120 is supplied to each lubricated portion such as the one-way clutch 27, the second speed clutch C2, and the bearing. The

  On the other hand, when the engine ENG is stopped by idling stop control or the like and the vehicle travels with the rotational driving force of the first driving motor M1, the rotational driving force of the first driving motor M1 is used as the motor power transmission mechanism 5 and the counter shaft 40. Is transmitted to the drive wheel via On the other hand, although the clutches C1 to C5 and CL in the transmission are open, the rotation of the counter shaft 40 is transmitted to the secondary shaft 20 by the so-called clutch drag effect, and the secondary shaft 20 rotates. Therefore, the second oil pump P2 driven by the electric motor M5 is operated in place of the first oil pump P1 whose operation is stopped when the engine ENG is stopped. When the second oil pump P2 is operated, the lubricating oil discharged from the pump opens the check valve 73c, and the control hydraulic pressure is supplied to the hydraulic circuit of the transmission control system via the oil passages 73 and 74. In addition, the relief valve provided in the second discharge oil passage 72 is opened, supplied to the oil temperature adjusting device 85 through the oil passages 76 and 77, and then supplied to the oil sump 90 and temporarily stored.

  The lubricating oil stored in the oil sump 90 naturally flows down the oil passage 91 according to gravity, and the lubricated portion 60 of the motor drive mechanism, that is, the motor drive gear 51, the motor idler gear 52, the motor secondary driven gear 53, and the secondary drive gear. 54, and supplied to each lubricated portion such as the synchro clutch 57. The lubricating oil is supplied to the motor drive mechanism 5 at a constant flow rate determined by the height difference between the oil reservoir 90 and each of the parts to be lubricated and the flow channel resistance, and is set to a flow rate that does not cause a stirring resistance.

  Since the discharge pressure of the second oil pump P2 is relatively low, the regulator valve 81 cannot be opened, and no lubricating oil pressure is established in the oil passage 93 when the first oil pump P1 is stopped. On the other hand, a natural supply pressure due to gravity acts on the oil passage 134 via the oil passage 92 according to the height difference (water head) between the oil surface height of the oil reservoir 90 and the shaft end oil chamber 130. For this reason, the lubricating oil stored in the oil sump 90 opens the check valve 94 and is supplied to the shaft end oil chamber 130 of the secondary shaft through the oil passage 92 and the oil passage 134. The amount of oil supplied is also a constant flow rate determined by the height difference between the oil level of the oil reservoir 90 and the lubricated portion 64 and the flow path resistance.

  The amount of lubricating oil supplied to the shaft end oil chamber 130 is set to a lubricating oil amount of about (a) to (b) in FIG. For this reason, the lubricating oil supplied to the shaft end oil chamber 130 has an annular liquid level distribution biased toward the outer peripheral wall surface side of the shaft end oil chamber 130, and almost all the lubricating oil in the shaft end oil chamber is the second in-shaft lubricating oil. The oil flows into the first in-shaft lubricating oil passage 110 without flowing into the passage 120, and most of the supplied oil amount is supplied to the one-way clutch 27 from the first lubricating hole 112. Further, the lubricating oil flowing from the oil passage opening 135 toward the shaft end surface 20f of the secondary shaft 20 flows into the second lubricating oil passage 120 when the second shaft end opening 125 passes the front of the oil passage opening 135, and the bearing Or the like to be lubricated intermittently.

  Therefore, when the motor is driven by the first drive motor M1, most of the lubricating oil supplied to the shaft end oil chamber is supplied to the one-way clutch 27 that requires lubrication even when the engine is stopped to wear the rollers (or sprags). In addition, the second-speed clutch C2 and the bearing are supplied with a small amount of lubricating oil to prevent overheating, so that agitation resistance due to excessive lubricating oil supply can be prevented and loss can be reduced.

  The secondary shaft 20 is disposed at the highest position among the four rotary shafts 10, 20, 30, and 40 disposed in the transmission 2. Lubricating oil that has lubricated each lubricated part on the shaft diffuses and drops on the gears and clutches on the other shafts, and is directed to the transmission 2 that does not transmit power when the engine is stopped when restarting. Minimal lubrication is ensured.

  Therefore, according to the lubricating oil supply device 100 of the present invention described above, the first and second in-shaft lubricating oil passages 110 and 120 sharing the shaft end oil chamber 130 are supplied to the shaft end oil chamber 130. Therefore, it is possible to provide a lubricating oil supply apparatus that can distribute the amount of oil to be supplied according to the amount of lubricating oil to be supplied and can supply the lubricating oil according to the priority order of the parts to be lubricated that require lubrication.

  Next, the lubricating oil supply apparatus 200 according to the second embodiment of the present invention will be briefly described with reference to FIG. FIG. 7 is a side view of the right end side shaft end surface of the secondary shaft 20 in the lubricating oil supply apparatus 200 as seen in FIG. 1 as viewed in the direction of arrows I-I in FIG. Except for the configuration of the first and second in-shaft lubricating oil passages, the configuration of the shaft end oil chamber 130 and the like is the same as that of the lubricating oil supply device 100 described above. Therefore, in the following, the configuration of the first and second in-shaft lubricating oil passages 210 and 220 will be described, and redundant description of other configurations and functions will be omitted. In addition, the same number is attached | subjected about the common part with the lubricating oil supply apparatus of embodiment mentioned above.

In the lubricating oil supply apparatus 200, the first shaft hole 211 of the first in-axis lubricating oil passage 210 extending into the shaft of the secondary shaft 20 and the second shaft hole 221 of the second in-axis lubricating oil passage 220 are the secondary shaft. It is formed on the same radius R in 20 radial directions. However, the shielding plate 216 is fixed to different radial positions by openings such as welding at the opening portions of the shaft end surface 20f of the first shaft hole 211 and the second shaft hole 221, so that the lubricating oil can flow in. The first shaft end opening 215 of the one-axis lubricating oil passage 210 and the shaft end opening 225 of the second in-axis lubricating oil passage 220 are each semicircular in the configuration example shown in FIG. The semicircular first shaft end opening 215 is located on the radially outer side of the second shaft end opening 225 and opens. That, r ₁ an aperture location radius of the first axial end opening 215, the opening location radius when the r ₂ of the second axial end opening 225 is configured to have a relation of r _1> r _2.

  For this reason, when the amount of lubricating oil supplied to the shaft end oil chamber 130 decreases and reaches a rotating liquid level, the same as the lubricating oil supply apparatus 100 described with reference to FIGS. 6 (a) to 6 (c). Thus, the lubricating oil is preferentially supplied to the first in-shaft lubricating oil passage 210. Therefore, the lubricating oil supply apparatus 200 of this configuration can also obtain the same effects as the above-described lubricating oil supply apparatus 100.

  In the embodiment, the case where the present invention is applied to the secondary shaft 20 in the automatic transmission in the hybrid vehicle has been described as an example. However, as is clear from the above description, the rotation having a plurality of lubricated portions on the shaft. If it is a shaft, it can be similarly applied to other vehicle forms and other rotating shafts, and the same effect can be obtained.

It is drawing which shows the principal part of the lubricating oil supply apparatus of 1st Embodiment, and is a side view of the right end part of the secondary shaft seen in the II arrow direction in FIG. It is a typical sectional view of a power transmission device to which the present invention was applied. It is a skeleton figure of the above-mentioned power transmission device including a motor drive mechanism. It is a principal part block diagram of the lubrication circuit in the said power transmission device. It is an expanded sectional view which expands and shows the secondary shaft vicinity part in FIG. It is explanatory drawing which shows typically liquid level distribution when the flow volume of the lubricating oil supplied to a shaft end oil chamber changes. It is drawing which shows the principal part of the lubricating oil supply apparatus of 2nd Embodiment, and is a side view of the right end part of the secondary shaft seen in the II arrow direction in 5 like FIG.

Explanation of symbols

ENG engine P1 1st oil pump (hydraulic supply source)
P2 Second oil pump (hydraulic supply source)
2 Transmission (transmission)
3 Transmission case (housing)
20 Secondary shaft (rotary shaft)
27 One-way clutch (first lubricated part)
20f Shaft end surface 100 Lubricating oil supply device 110 First shaft lubricating oil passage 111 First shaft hole 112 First lubricating hole 115 First shaft end opening 120 Second shaft lubricating oil passage 121 Second shaft hole 122 Second lubricating hole 125 Second shaft end opening 130 Shaft end oil chamber

Claims (2)

A rotating shaft and a housing that rotatably supports the rotating shaft;
A first shaft hole having a first shaft end opening on the shaft end surface of the rotating shaft and extending into the shaft of the rotating shaft, and a first lubricated portion on the rotating shaft in communication with the first shaft hole A first in-shaft lubricating oil passage composed of connected first lubricating holes;
A second shaft hole having a second shaft end opening on the shaft end surface and extending into the shaft of the rotating shaft, and a second shaft communicating with the second shaft hole and connected to a second lubricated portion on the rotating shaft. A second in-shaft lubricating oil passage comprising a lubricating hole;
The shaft end surface is formed between the housing and the shaft end portion of the rotary shaft, and communicates with the first and second in-shaft lubricating oil passages via the first and second shaft end openings. A first end oil chamber and a second end oil on the rotating shaft via the first and second in-shaft lubricating oil passages. In the lubricating oil supply device for the transmission that supplies the lubrication part,
The transmission oil supply device for a transmission, wherein the first shaft end opening and the second shaft end opening are formed at different radial positions in the radial direction of the rotating shaft. The first shaft end opening and the second shaft end opening may be configured such that the required oil amount is relatively large according to the required oil amount of the first lubricated part and the second lubricated part. The shaft end opening of the lubricated part is formed on the outer peripheral side in the radial direction of the rotating shaft with respect to the shaft end opening of the second or first lubricated part with a relatively small amount of the required oil. The lubricating oil supply device for a transmission according to claim 1.

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