CN107084235B - Oil path structure - Google Patents

Abstract

A kind of oil path structure can improve the setting freedom degree in oil pressure path.The oil path structure is characterized in that, with stator axis (66), there is bushing (B1) in the periphery of stator axis (66), oil circuit (S1) and oil circuit (S2), there are sleeve (67) in the inner circumferential of stator axis (66), there is oil circuit (S3) between sleeve (67) and stator axis (66), there is the oil circuit (S4) separated with oil circuit (S3) in the inner circumferential of sleeve (67), oil circuit (S1) is connect via oil circuit (S3) with oil circuit (S2), when from the radial direction of stator axis (66), oil circuit (S3) is overlapped with bushing (B1).

Description

Oil path structure

Technical field

The present invention relates to a kind of oil path structures.

Background technique

For example, the fluid torque-converter of locking clutch has in the torque converter casing being made of impeller of pump and torque-converters cover The Fluid-transmission portion formed by impeller of pump, turbine and stator is provided with structure between the turbine in torque converter casing and torque-converters cover At the piston of lock-up clutch.

Lock-up clutch makes piston be crimped on bending moment by the pressure difference of supply pressure and release pressure in control torque converter casing It is switched between the lockup state of device cover and the unlocked state for not being crimped on torque-converters cover, the oil pressure being connect with fluid torque-converter Path is usually two systems (such as patent document 1).

On the other hand, as the other way of lock-up clutch, there is mode (such as the patent document using multi-plate clutch 2), in which, due to the additional oil circuit to the hydraulic chamber for coupling multi-plate clutch, so being connect with fluid torque-converter Oil pressure path be three systems.

Existing technical literature

Patent document

Patent document 1: Japanese Unexamined Patent Publication 2015-110975 bulletin

Patent document 2: Japanese Unexamined Patent Publication 2007-16833 bulletin

The oil pressure path connecting with fluid torque-converter inserts in input using the inside of input shaft or the periphery of input shaft and outside The gap etc. of the inner circumferential of the cartridge of axis is set.

Here, the gap due to the inner circumferential in the periphery and cartridge of input shaft exists configured with can relative rotation twelve Earthly Branches The region of the bearing of input shaft and cartridge is held, so needing to avoid the position of bearing in the case where the gap sets oil circuit It sets to set oil circuit.

The case where restriction when setting this oil circuit is not limited only to fluid torque-converter, in the automatic transmission of oil pressure actuated The common presence in each position.

Problems to be solved by the invention

But such as patent document 2, if the quantity of oil circuit increases, it is difficult to avoid the position of bearing to set oil circuit, it should In the case of, bearing is located in oil circuit as a result, the flowing of the oil in oil circuit is obstructed in the region of setting bearing.

Here, the position of change bearing is considered in order to hinder the flowing of oil by bearing, but if the position of change bearing It sets, then can change positioned at the rotary part of internal side diameter of bearing and the bearing position of the rotary part positioned at outside diameter, because This, it is possible to create the problems such as the axis deviation of these rotary parts.

But the position of oil circuit is changed in order not to change the position of bearing, it needs significantly to change around input shaft Design.

Summary of the invention

Then, seek not need bearing position change or the significantly design alteration of oil path structure and can be improved oil Press the technology of the setting freedom degree in path.

Oil path structure of the invention is characterized in that, has first axle, the periphery of the first axle have first bearing, First oil circuit and the second oil circuit have first sleeve in the inner circumferential of the first axle, in the first sleeve and the first axle Between have third oil circuit, first oil circuit is via the third oil circuit and second oil circuit connection, from the first axle Radial observation when, the third oil circuit is overlapped with the first bearing.

According to the present invention, by first sleeve, in the region (space) of first axle inner circumferential, be connected to the of first axle The position that one bearing is overlapped, is configured to the detour oil circuit (third oil circuit) for the first bearing that detour is abutted with first axle.Therefore, At additional oil pressure path, the position of the first bearing abutted with first axle can not be changed and form detour and abutted with first axle First bearing oil pressure path.

The position change or the significantly design alteration of oil path structure that therefore, there is no need to carry out first bearing, can mention The setting freedom degree in high oil pressure path.

Detailed description of the invention

Fig. 1 is the figure for illustrating the oil path structure of fluid torque-converter of embodiment；

Fig. 2 is the enlarged view of the main part of the oil path structure in fluid torque-converter；

Fig. 3 is the enlarged view of the main part of the oil path structure in fluid torque-converter；

Fig. 4 is the enlarged view of the main part of the oil path structure of the fluid torque-converter of variation.

Symbol description

1 fluid torque-converter

15 Fluid-transmission portions

16 lockable mechanism portions

2 torque converter casings

25 torque-converters covers

28 transmission cases

29 supporting parts

3 impellers of pump

31 pump cases

32 pump blades

33 impeller of pump sleeves

331 cylindrical portions

332 plectane portions

4 torque-converters covers

41 round plates

5 turbines

51 turbine cases

52 turbo blades

53 turbine hubs

531 cylindrical portions

532 plectane portions

6 stators

62 stator vanes

63 outer rings

64 clutch main bodies

65 inner rings

66 stator axis

661 thinner wall sections

67 sleeves

The front end 67a

67c, 67d through hole

68,69,69a, 69b oil circuit

7 sleeves

71 wide diameter portions

8 follower plates

9 clutch hubs

91 plectane portions

92 barrel portions

93 outside diameter friction plates

94 internal side diameter friction plates

95 supporting hubs

96 pistons

960 base portions

961 internal perisporiums

962 periphery walls

963 press sections

100 bearing parts

101 groove portions

102 axle portions

104 support holes

105 wall portions

120 input shafts

The front end 120a

121 oil circuits

121a wide diameter portion

122 thinner wall sections

123,124 oilhole

B1, B2, B3 bushing

OWC one-way clutch

R grease chamber

R1 rivet

S oil sealing

S1~S8 oil circuit

S1a~S1c, S3a~S3b oil circuit

X rotary shaft

Specific embodiment

Hereinafter, illustrating this in case where the oil path structure that oil path structure of the invention is suitable for fluid torque-converter 1 The embodiment of invention.Fig. 1 is the figure for illustrating the oil path structure in fluid torque-converter 1.Fig. 2 is the locking machine of fluid torque-converter 1 The enlarged drawing on 16 periphery of structure portion.Fig. 3 is the enlarged drawing on the periphery rotary shaft X of fluid torque-converter 1.

As shown in Figure 1, fluid torque-converter 1 has fluid in the torque converter casing 2 being made of impeller of pump 3 and torque-converters cover 4 Driving section 15 and lockable mechanism portion 16.

In Fluid-transmission portion 15, impeller of pump 3 and turbine 5 be provided on common rotary shaft X can relative rotation, stator 6 between these impellers of pump 3 and turbine 5.

In torque converter casing 2, Fluid-transmission portion has been provided spaced apart between the round plate 41 of torque-converters cover 4 at it 15, lockable mechanism portion 16 is located between the Fluid-transmission portion 15 and the round plate 41 of torque-converters cover 4.

Torque-converters cover 4 links through the crankshaft of not shown driving plate and engine, when the rotary driving force of engine passes through When inputting impeller of pump 3 by torque-converters cover 4, the rotary driving force being entered is transmitted to turbine 5 via the oil in torque converter casing 2.

Impeller of pump 3 has pump case 31, the multiple pump blades 32 for being installed on pump case 31, the pump with the internal side diameter connection of pump case 31 Impeller sleeve 33 and constitute.

Pump case 31 and the opposite face of turbine 5 are provided with multiple pump blades 32, pump blade 32 is in the circumferential direction around rotary shaft X On, it is radially configured from end on observation.

Impeller of pump sleeve 33 has the tubular extended along the axial direction (below also labeled as rotary shaft X-direction) of rotary shaft X The plectane portion 332 that the end of portion 331 and 5 side of turbine (right side in figure) from cylindrical portion 331 extends to radial outside, section is seen It examines with shape generally L-shaped.

The coupling part of the inner circumferential side of the peripheral side and pump case 31 in plectane portion 332 is soldered W throughout complete cycle.

The perforation of cylindrical portion 331 is set to the oil sealing S of the opening 26 of torque-converters cover 25 and is arranged, and is being located at the outer of torque-converters cover 25 The front end 331a in portion is equipped with sprocket wheel 27.

In embodiment, when the rotary driving force of engine is inputted impeller of pump 3, the cylindrical portion 331 of impeller of pump sleeve 33 When around rotary shaft X rotation, the rotation of cylindrical portion 331 via the periphery for being wound in sprocket wheel 27 chain transmitting oil-feed pump (not shown) (not shown), to drive oil pump.

The rotation of impeller of pump 3 also passes to turbine 5 via the oil in torque converter casing 2, which has turbine case 51, peace Multiple turbo blades 52 loaded on turbine case 51, the turbine hub for linking turbine case 51 and input shaft 120 as rotary shaft 53 and constitute.

Turbine case 51 and the opposite face of impeller of pump 3 are provided with multiple turbo blades 52, turbo blade 52 is around rotation In the circumferential direction of axis X, radially configured from end on observation.

As shown in Fig. 2, turbine hub 53 has along the rotary shaft X cylindrical portion 531 extended and from the circle of cylindrical portion 531 The plectane portion 532 that the end of 41 side of pan portion (right side in figure) extends to radial outside.

In the inner circumferential of cylindrical portion 531, the spline extended along rotary shaft X-direction is provided with throughout complete cycle, turbine case 51 exists The periphery spline of the input shaft 120 extended from gear portion (not shown) to 1 side of fluid torque-converter is provided with tubular chimericly Portion 531.

In embodiment, when the rotary driving force of engine is transmitted from impeller of pump 3 to turbine 5, turbine 5 around rotary shaft X into When row rotation, turbine 5 is rotated integrally with input shaft 120, and the rotary driving force of engine is input into the change in the left side in figure Fast mechanism part (not shown).

Peripheral part 532a in plectane portion 532, by rivet R1 be fixed with the inner circumferential side of turbine case 51 linking part 51a, With the linking part 81 of the inner circumferential side of the follower plate (not shown) of vibration absorber.

The clutch hub 9 for constituting lockable mechanism portion 16 has barrel portion 92, the inner circumferential in the barrel portion 92, along around rotary shaft The circumferential direction of X is provided with the spline 92a along rotary shaft X-direction at predetermined intervals.

In clutch hub 9, the outer diameter for making periphery spline be embedded in barrel portion 92 is provided spaced apart along rotary shaft X-direction Side friction plate 93, outside diameter friction plate 93, which is provided in, to be limit in the state of the circumferential rotation of rotary shaft X, and edge is revolved Shaft X-direction is removable.

Internal side diameter friction plate 94 is located between the adjacent outside diameter friction plate 93,93 of rotary shaft X-direction, these internal side diameters Friction plate 94 and outside diameter friction plate 93 exist in the interaction of rotary shaft X-direction.

Internal side diameter friction plate 94 and the periphery spline of the supporting hub 95 of the tubular for the round plate 41 for being fixed on torque-converters cover 4 are embedding It closes, internal side diameter friction plate 94, which is provided in, to be limited by the spline 95a of the periphery of supporting hub 95 to the circumferential direction around rotary shaft X Rotation in the state of it is removable along rotary shaft X-direction.

The press section 963 of piston 96 is from rotary shaft X-direction and these internal side diameter friction plates 94 and outside diameter friction plate 93 , the outside diameter friction plate 93 being located near 15 side of Fluid-transmission portion (in figure left side) abuts.

Piston 96 has peripheral wall portion (inner circumferential in the inner periphery and the outer periphery for forming cricoid base portion 960 from rotary shaft X-direction Wall 961, periphery wall 962), these peripheral wall portions (internal perisporium 961, periphery wall 962) extend to 41 side of round plate of torque-converters cover 4 to be set It sets.

Press section 963 extends from the end of 41 side of round plate of periphery wall 962 to radial outside, which spreads The complete cycle of cricoid periphery wall 962 is formed from rotary shaft X-direction and is arranged.

Piston 96, which is provided in, makes the base portion 960 of the piston 96 be located at the cricoid groove portion for being set to bearing part 100 Removable along rotary shaft X-direction in the state of in 101, the space surrounded by the base portion 960 of groove portion 101 and piston 96 becomes supply The grease chamber R of the driving oil pressure of piston 96.

It is provided with not between the face of grease chamber R opposite side and the round plate 41 of torque-converters cover 4 in the base portion 960 of piston 96 The spring of diagram acts on the direction for being accommodated in base portion 960 in groove portion 101 (in figure to piston 96 always from spring (not shown) Left direction) pressing force.

In embodiments, when to grease chamber R for oil feed pressure, piston 96 is displaced to 41 side of round plate of torque-converters cover 4.

Moreover, by the displacement of the piston 96 to 41 side of round plate, in the outside diameter friction of rotary shaft X-direction interaction configuration When plate 93 and internal side diameter friction plate 94 are compressed between the press section of piston 96 963 and round plate 41, outside diameter friction is kept The relative rotation of the torque-converters cover 4 of the clutch hub 9 and holding internal side diameter friction plate 94 of plate 93 is limited according to compressing force, most Reach the state (lockup state) that torque-converters cover 4 and clutch hub 9 do not link revolvably relatively eventually.

In addition, piston 96 passes through the active force that acts on from spring (not shown) when oil pressure is cut off to the supply of grease chamber R It is displaced to the direction (left direction in figure) that base portion 960 is accommodated in groove portion 101, back to allowing to keep outside diameter friction plate 93 The state (unlocked state) of the relative rotation of the torque-converters cover 4 of clutch hub 9 and holding internal side diameter friction plate 94.

In embodiments, by grease chamber R between piston 96, the piston 96 and the groove portion 101 of bearing part 100, by The outside diameter friction plate 93 of the holding of clutch hub 9, the internal side diameter friction plate 94 kept by supporting hub 95 constitute lockable mechanism portion 16.

Moreover, because clutch hub 9 with and the turbine 5 that rotates integrally of input shaft 120 the connection of turbine hub 53, so working as When lockable mechanism portion 16 becomes lockup state, the rotary driving force for being input to the engine of torque-converters cover 4 is directly inputted to input Axis 120.

In the bearing part 100 of supporting piston 96, axle portion 102 is inserted in outside the internal perisporium 961 of piston 96, on 96 edge of piston Axis direction be displaced when, internal perisporium 961 is slided along the outer peripheral surface 102a of axle portion 102, prevent as a result, piston 96 relative to The inclination of rotary shaft X.

Protrusion 103 positioned at the one end of axle portion 102 is the position for the positioning of the crankshaft of engine (not shown), Perforation is set to the through hole 41a of the round plate 41 of torque-converters cover 4, is located at engine side (not shown).

In axle portion 102, along the support holes with the end 104 of rotary shaft X setting in 2 inner opening of torque converter casing, front end 120a The input shaft 120 that side inserts the support holes 104 is rotatably supported by the support holes 104 around rotary shaft X.

In axle portion 102 and 103 opposite side of protrusion, being extended to radial outside has a cricoid wall portion 105, in the wall Portion 105 is provided with above-mentioned groove portion 101 with the opposite face of round plate 41.

In axle portion 102, radial direction (thickness direction) the perforation axle portion 102 along rotary shaft X is provided with oil circuit S5, S8 (oilhole), These oil circuits S5, S8 is provided spaced apart in rotary shaft X-direction.

One oil circuit S8 is formed from the substantially uniform position the bottom 104a of support holes 104 with the direction orthogonal with rotary shaft X, By lockable mechanism portion 16 be lockup state the case where piston 96 base portion 960 position on the basis of, be arranged to that piston will be compared 96 region more by 41 side of round plate is connected to support holes 104.

Therefore, even if when lockable mechanism portion 16 is lockup state, region and the branch of 41 side of round plate are more leaned on than piston 96 Bearing bore 104 also can be always connected to via oil circuit S8, the opening of the oil circuit S8 in torque converter casing 2 (referring to symbol P1 in Fig. 3) at Discharge mouth for oil relative to torque converter casing 2.

Another oil circuit S5 relative to rotary shaft X inclination predetermined angular setting, with lockable mechanism portion 16 be unlocked state when On the basis of the position of the base portion 960 of piston 96, it is arranged to for groove portion 101 (grease chamber R) being connected to support holes 104.

Here, the front end side 120a of input shaft 120 is inserted into support holes 104, in the front end 120a of the input shaft 120 Side, the oilhole 123 being connected to aftermentioned oil circuit S6 are open in the inner circumferential of support holes 104.

In embodiments, with the oil of the aperture position of the oil circuit S5 of the inner circumferential of support holes 104 and the inner circumferential of support holes 104 The consistent mode of the aperture position in hole 123 sets the position of oil circuit S5 and oilhole 123.

Therefore, even if when lockable mechanism portion 16 is unlocked state, grease chamber R and oil circuit S6 also can via oilhole 123 and Oil circuit S5 is always connected to.

As shown in Figure 1, being penetrated through the cylindric stator of stator 6 by the input shaft 120 that support holes 104 support the side front end 120a Axis 66 extends to the gear portion (not shown) side in transmission case 28.

Stator 6 is made of multiple stator vanes 62 of base portion 61 and the outer peripheral surface for being disposed in base portion 61, and passes through bearing base The one-way clutch OWC of the inner circumferential in portion 61, it is only rotatable on the direction around rotary shaft X.

As shown in Figure 1, one-way clutch OWC has the outer ring 63 of the base portion 61 of periphery fixed stator 6, is connected to outer ring 63 Inner peripheral surface clutch main body 64, be connected to clutch main body 64 inner peripheral surface setting inner ring 65.

In the chimeric one end 66a for having the stator axis 66 extended along input shaft 120 of the inner circumferential spline of inner ring 65, stator axis 66 extend between the cylindrical portion 331 and input shaft 120 of impeller of pump sleeve 33 to 28 side of transmission case (left side in figure).

The embedded cricoid supporting part 29 for being fixed on transmission case 28 in the other end side 66b of stator axis 66.As fixation The stator axis 66 of axis cannot be rotated around rotary shaft X.

As shown in figure 3, in stator axis 66, from the cylindrical portion 331 of the radial observation of rotary shaft X and impeller of pump sleeve 33 and The region that sprocket wheel 27 is overlapped is provided with the thinner wall section 661 that the radial thickness of rotary shaft X is thin compared with other regions.

The thinner wall section 661 concaves towards the radial recess portion of rotary shaft X in the inner circumferential setting of stator axis 66 and is formed, in thinner wall section 661 periphery is provided spaced apart the bushing B1 and support chain of the inner circumferential of bearing impeller of pump sleeve 33 along rotary shaft X-direction The bushing B3 of the inner circumferential of wheel 27.

The thinner wall section 661 of stator axis 66 is set to, positioned at the bushing B1 of side and positioned at the other side in rotary shaft X-direction Length L1 of the bushing B3 from the radial observation of rotary shaft X in the region of thinner wall section 661 range.

In the stator axis 66 of tubular, from the sleeve 67 of 28 side of transmission case (left side in figure) interpolation tubular, the sleeve 67 Front end 67a is located at than thinner wall section 661 more by the side one-way clutch OWC (right side in figure).

For sleeve 67, the periphery in other regions in addition to the region of thinner wall section 661 seamlessly with stator axis 66 Inner circumferential connect, in other regions in addition to thinner wall section 661, between the inner circumferential of stator axis 66 and the periphery of sleeve 67 oil not Circulation.

In embodiment, by the inner circumferential (inner circumferential of thinner wall section 661) and sleeve 67 in the region equipped with recess portion of stator axis 66 Periphery between the oil circuit (S3, S3a) that leads to as oil stream of gap use, the periphery of the inner circumferential of the stator axis 66 and sleeve 67 it Between oil circuit (S3, S3a) in the circumferential direction around rotary shaft X be equipped with it is multiple.

The thinner wall section 661 positioned at the stator axis 66 more upper than rotary shaft X in Fig. 3, in rotary shaft X-direction One end is provided with the cylindrical portion 331 for making to be formed in the S3 of the oil circuit between thinner wall section 661 and sleeve 67 and impeller of pump sleeve 33 The oil circuit 68 of oil circuit S2 connection between inner circumferential and the periphery of stator axis 66.

In addition, also being provided with keeping the oil circuit S1 of oil circuit S3 and the supporting part 29 set on transmission case 28 (oily in the other end Discharge path) connection oil circuit 69.

Here, from rotary shaft X radial direction observation, oil circuit S3 by equipped with impeller of pump sleeve 33 cylindrical portion 331 inner circumferential The crosscutting rotary shaft X-direction setting in the region of bushing B1, B3 between the periphery of stator axis 66.

Therefore, oil circuit S1 and oil circuit S2 detour that the region equipped with bushing B1, B3 is clipped in the middle are located at stator axis 66 Oil circuit S3 in thickness and be interconnected.

In addition, region (the reference in the plectane portion 332 of the impeller of pump sleeve 33 in rotary shaft X-direction in crosscutting oil circuit S2 Symbol P2 in figure) become discharge mouth of the oil relative to torque converter casing 2.

Internal side diameter in the region for being provided with thinner wall section 661 of stator axis 66, the inner circumferential of sleeve 67 and input shaft 120 it is outer Gap between week becomes the oil circuit S4 for constituting a part on the supply road of movement oil pressure of lockable mechanism portion 16.

The thinner wall section 661 for being located at the stator axis 66 than rotary shaft X more on the lower in Fig. 3, in rotary shaft X-direction The other end is provided with the oil circuit 69a for being connected to oil circuit S3a with the oil circuit S1a of the supporting part 29 set on transmission case 28.

In addition, the position corresponding with oil circuit S3a in sleeve 67 is formed with through hole 67c, positioned at stator axis 66 The oil circuit S1a in outside and oil circuit S4 positioned at the inside of stator axis 66 are interconnected via oil circuit S3a.

Therefore, implementing from the oil circuit S1a of 28 side of transmission case to the oil circuit S4 for the inside for being located at stator axis 66 for oil supply In mode, by supplying the movement oil pressure of lockable mechanism portion 16 from oil circuit S1a, by the inner circumferential and set of the thinner wall section of stator axis 66 Oil circuit S3a between the periphery of cylinder 67 is used as a part on the supply road of the movement oil pressure of lockable mechanism portion 16.

Moreover, the supply road of the movement oil pressure is in order to avoid the lining between the periphery and stator axis 66 of input shaft 120 The spline fitting portion of B2, turbine hub 53 and input shaft 120 and the grease chamber R supply action oil pressure to lockable mechanism portion 16 are covered, and The inside of detour input shaft 120.

The oil circuit 121 linearly extended in the inside of the input shaft 120 along rotary shaft X is formed in input shaft 120.It should The wide diameter portion 121a that oil circuit 121 has internal diameter bigger than 28 side of transmission case in the front end side 120a of input shaft 120, the wide diameter portion 121a is open in the front end 120a of input shaft 120, connects the inside of the support holes 104 of oil circuit 121 and above-mentioned bearing part 100 It is logical.

The region equipped with wide diameter portion 121a in input shaft 120, oil circuit 121 becomes the radial thickness of input shaft 120 Thinned thinner wall section 122 is inserted into cylindric sleeve 7 from the front end 120a of input shaft 120 to the oil circuit 121.

The front end 7a perforation wide diameter portion 121a of sleeve 7 reaches the region of the oil circuit 121 of common internal diameter, and sleeve 7 is with continuously Unoccupied place is crimped on the prescribed limit of the state setting side front end 7a of the inner circumferential of input shaft 120 (oil circuit 121).

The side cardinal extremity 7b of sleeve 7 is provided with the outer diameter wide diameter portion 71 bigger than the front end side 7a, sleeve 7 is seamlessly to crimp The region of wide diameter portion 71 is equipped in the state setting of the inner circumferential of wide diameter portion 121a (thinner wall section 122).

Therefore, the region in the oil circuit 121 of the front end side 7a for being located at sleeve 7 and cardinal extremity 7b side are equipped with wide diameter portion 71 Region, between the periphery in the region of the front end side 7a of the inner circumferential and sleeve 7 of oil circuit 121 or the inner circumferential of thinner wall section 122 and expanding Do not circulate oil between the periphery in portion 71.

In embodiment, the space in the wide diameter portion 121a in oil circuit 121 is divided into the space of outside diameter by sleeve 7 The space (oil circuit S7) of (oil circuit S6) and internal side diameter, by the space (oil circuit S7) of internal side diameter as oily giving to Fluid-transmission portion 15 Road is arranged to use, on the other hand, the supply for acting oil pressure by the space (oil circuit S6) of outside diameter as lockable mechanism portion 16 Oil circuit utilizes.

Therefore, in the thinner wall section 122 of input shaft 120, in the front end side 120a (right side in figure) of rotary shaft X-direction, along rotation Radial perforation 122 ground of thinner wall section of shaft X be formed with oil circuit S6 between the inner circumferential for making input shaft 120 and the periphery of sleeve 7 and The oilhole 123 for the oil circuit S5 connection being connected to grease chamber R.

In addition, in 28 side of transmission case (left side in figure) of thinner wall section 122, along the radial perforation thinner wall section 122 of rotary shaft X Ground is formed with the oilhole 124 for being connected to the S4 of the oil circuit between the periphery of input shaft 120 and the inner circumferential of stator axis 66 and oil circuit S6.

Moreover, in embodiments, being equipped between the inner circumferential of stator axis 66 and the periphery of input shaft 120 can relative rotation Ground supports the side one end 66a of stator axis 66 and the bushing B2 of input shaft 120, is more leaning on 28 side of transmission case than bushing B2 (left side in figure), oilhole 124 is connected to oil circuit S4.

In turn, in input shaft 120, it is (in figure right that the end side 120a is located further forward in the region being fitted into than 53 spline of turbine hub Side), oilhole 123 is connected to via oil circuit S5 with grease chamber R.

Therefore, the supply road detour of the movement oil pressure of lockable mechanism portion 16 is formed in the wide diameter portion 121a in input shaft 120 Region oil circuit S6 be in rotary shaft X-direction with specific length L2 oil circuit S6 and set, to grease chamber R supply driving The flowing of oil pressure not will receive the interference of bushing B2 or turbine hub 53 and be obstructed.

In addition, as the oil circuit S8 that oil is used to the discharge road in Fluid-transmission portion 15, via above-mentioned bearing part 100 Support holes 104 and oil circuit S8, are connected to the space in torque-converters cover 4.

The effect of the fluid torque-converter 1 of the structure is illustrated.

By oil circuit 121 (oil circuit S7) as the supply road of the oil for torque transfer between impeller of pump 3 and turbine 5 and In the case where use, the oil supplied from oil circuit 121 is via the support holes 104 and oil circuit S8 of bearing part 100 into torque-converters cover 4 Space supply.

Moreover, the oil in space in torque-converters cover 4 is between stator axis 66 and the cylindrical portion of impeller of pump sleeve 33 331 Oil circuit S2, and the oil circuit S3 of the inner circumferential side by being formed in stator axis 66, are discharged to the oil circuit S1 of transmission case 28.

Make in the discharge path by oil circuit 121 (oil circuit S7) as the oil for the torque transfer between impeller of pump 3 and turbine 5 In the case where, from the oil circuit S1 of transmission case 28 supply oil, by be formed in the inner circumferential side of stator axis 66 oil circuit S3 and Oil circuit S2 between stator axis 66 and the cylindrical portion of impeller of pump sleeve 33 331, the space supply into torque-converters cover 4.

Moreover, the oil in space in torque-converters cover 4 passes through the support holes 104 and oil circuit S8 of bearing part 100, from input The oil circuit 121 of axis 120 is discharged.

The movement oil pressure of lockable mechanism portion 16 supplies road (oil circuit from the oil pressure for the supporting part 29 for being set to transmission case 28 S1a), and by the oil circuit S3a between the inner circumferential of stator axis 66 and the periphery of sleeve 67, be supplied to input shaft 120 periphery and After oil circuit S4 between the inner circumferential of sleeve 67, passed through later by the oil circuit S6 being set in the thinner wall section 122 of input shaft 120 Oil circuit S5 is supplied to the grease chamber R of piston 96.

As above, in embodiments, (1) a kind of oil path structure, which is characterized in that have stator axis 66 (first axle), The periphery of stator axis 66 has bushing B1 (first bearing), oil circuit S1 (the first oil circuit) and oil circuit S2 (the second oil circuit), in stator The inner circumferential of axis 66 has sleeve 67, has oil circuit S3 (third oil circuit) between sleeve 67 and stator axis 66, oil circuit S1 is via oil Road S3 is connect with oil circuit S2, and from the radial direction of stator axis 66, oil circuit S3 is overlapped with bushing B1.

When such constitute, then supported in the region (space) of the inner circumferential of stator axis 66 with stator axis 66 by sleeve 67 The position that the bushing B1 connect is overlapped, is configured to the oil circuit S3 (detour oil circuit) for the bushing B1 that detour is abutted with stator axis 66.

Therefore, at additional oil pressure path, the position of the bushing B1 abutted with stator axis 66 can not be changed and formed circuitous Go back to the oil pressure path of the bushing B1 abutted with stator axis 66.

It therefore, there is no need to carry out the change of the position of bushing B1 (first bearing) or the significantly design of oil path structure Change, and improve the freedom degree of the setting in oil pressure path.

(2) it is set as such as flowering structure: having in the region (space) of the inner circumferential of stator axis 66 through sleeve 67 and oil circuit S3 points From oil circuit S4 (the 4th oil circuit).

When such constitute, then the region (space) of the inner circumferential of stator axis 66 is divided by sleeve 67 and to be separated from each other Therefore oil circuit S3 and oil circuit S4 can make the oil circuit and stator between the inner circumferential for being formed in stator axis 66 and the periphery of sleeve 67 Other oil communications of the inner side and outer side of axis 66, therefore, the freedom degree of the setting of oil circuit improve.

(3) a kind of oil path structure of fluid torque-converter 1, in the torque converter casing 2 being made of impeller of pump 3 and torque-converters cover 4 Has the Fluid-transmission portion 15 being made of impeller of pump 3, turbine 5 and stator 6 and can cannot be opposite by torque-converters cover 4 and turbine 5 The lockable mechanism portion 16 rotatably coupled, wherein, can be opposite (on coaxial) on common rotary shaft X in Fluid-transmission portion 15 It is configured with stator 6 between the impeller of pump 3 being rotatably oppositely disposed and turbine 5, the rotation driving of impeller of pump 3 is input to from driving source Power passes to turbine 5 via the fluid (oil) in torque converter casing 2, which includes the stator axis 66 (first axle) of tubular, It is arranged along rotary shaft X, and the internal side diameter of the one end of longitudinal direction and stator 6 links, and stator 6 is maintained at predetermined bits It sets, another side is fixed in transmission case 28 (fixed sidepiece part)；Impeller of pump sleeve 33 is arranged, long side along rotary shaft X The one end in direction and the internal side diameter of impeller of pump 3 link, and inside is penetrated through by stator axis 66 along rotary shaft X-direction；Bushing B1 (first Bearing), it is set between the periphery of stator axis 66 and the inner circumferential of the cylindrical portion 331 of impeller of pump sleeve 33, relatively rotatably Support stator axis 66 and cylindrical portion 331；Oil circuit S1 (the first oil circuit) is located at the speed changer of bushing B1 in rotary shaft X-direction 28 side of case (a side side)；Oil circuit S2 (the second oil circuit) is located at the periphery of the stator axis 66 of 15 side of Fluid-transmission portion (other side) Between the inner circumferential of cylindrical portion 331；The sleeve 67 (first sleeve) of tubular, inside inserts in stator axis 66；Oil circuit S3 (third oil Road), it is formed between the periphery of sleeve 67 and the inner circumferential of stator axis 66；The oil circuit S4 (the 4th oil circuit) of the inside of sleeve 67, From the radial direction of rotary shaft X the range from a side to the other side across bushing B1 is arranged in, by oil circuit S1 (first in oil circuit S3 Oil circuit) and oil circuit S2 (the second oil circuit) via oil circuit S3 (third oil circuit) connect.

When such constitute, then bushing B1 is avoided, is formed by the discharge of oil circuit S1, oil circuit S2 and oil circuit the S3 oil pressure constituted Road (the first oil pressure path).

Therefore, when the supply road or discharge path that oil circuit S1 is set as to oil pressure, then stator axis 66 and impeller of pump sleeve 33 it Between oil circuit S2 be connected to the space in torque converter casing 2, therefore, can will participate in constituting by impeller of pump 3, turbine 5 and stator 6 Fluid-transmission portion 15 in rotary driving force transmitting oil, suitably to storage Fluid-transmission portion 15 torque converter casing 2 supply It gives, or is suitably discharged from torque converter casing 2.

Moreover, the oil in the region equipped with bushing B1 in oil circuit cannot be obtained if bushing B1 is located at the midway of oil circuit Road surface product then may hinder the component (bushing B1 etc.) of the movement of oil not to be located at oil circuit S1 to oil circuit S3 but if as above constituting Between, it can ensure oil circuit area throughout the overall length of flow path.

As a result, since the supply of oil or discharge do not postpone, so can suitably prevent to oil pump (not shown) or oil pump The load of driving source (such as engine) the case where increasing.

(4) it is set as such as flowering structure: forming the recess portion for concaving towards peripheral side in the inner circumferential of stator axis 66, it should by the blocking of sleeve 67 The inside in the region of recess portion forms oil circuit S3.

With this configuration, then it does not need to increase from fluid torque-converter 1 to transmission case 28 and prolong in order to which oil circuit S3 is arranged Therefore the outer diameter of the cylindrical portion 331 for the impeller of pump sleeve 33 stretched can not significantly change setting for existing fluid torque-converter It counts and sets oil circuit S3.

(5) be set as such as flowering structure: the cylindrical portion 331 of impeller of pump sleeve 33 penetrates through the bending moment that storage torque converter casing 2 is arranged in Opening 26 on device cover 25 simultaneously extends to 28 side of transmission case, inner circumferential and cylinder of the bushing B1 in the opening 26 of sealing torque-converters cover 25 The internal side diameter of oil sealing S between the periphery in shape portion 331 can support cylindrical portion 331 and stator axis 66 with the relative rotation.

When changing the position of bushing B1, then between the inner circumferential of the opening 26 of torque-converters cover 25 and the periphery of cylindrical portion 331 Leakproofness may be decreased or there may be the axle center of the input shaft 120 rotated around rotary shaft X or impeller of pump sleeve 33 is inclined Tiltedly, therefore, it is necessary to carry out the design alteration around input shaft 120.

As described above, forming oil by the inside in the concave region for forming the inner circumferential by the blocking stator axis 66 of sleeve 67 Therefore road S3, the reduction of leakproofness or the generation of axis deviation will not occur without changing the position of bushing B1 Problem.

(6) a kind of oil path structure, which is characterized in that there is input shaft 120 (second in the inner circumferential of sleeve 67 (first sleeve) Axis), there is sleeve 7 (second sleeve) in the inner circumferential of input shaft 120, there is bushing B2 (the second axis in the periphery of input shaft 120 Hold) and oil circuit S5 (the 5th oil circuit), there is oil circuit S7 (the 7th oil circuit) in the inner circumferential of sleeve 7, oil circuit S4 is via oil circuit S6 and oil Road S5 connection, from the radial direction of input shaft 120, oil circuit S6 is overlapped with bushing B2.

When such constitute, even if then also can in the case where the inner periphery and the outer periphery of stator axis 66 are configured with bushing B1, B2 It enough avoids bushing B1, B2 and forms oil pressure path.Therefore, at additional oil pressure path, the position of bushing B1, B2 can not be changed It sets, and the oil pressure path of detour bushing B1, B2 can be formed.

(7) a kind of oil path structure, comprising: input shaft 120 (the second axis) is penetrated through from 28 side of transmission case (other side) and covered The inside of cylinder 67, and the front end side 120a is made to be located at the internal side diameter of lockable mechanism portion 16；Oil circuit 121, in input shaft 120 along Rotary shaft X extends, and is open in front end 120a；Sleeve 7 (second sleeve) is inserted into from the front end side 120a of input shaft 120 Into oil circuit 121；Bushing B2 (second bearing) is set between the inner circumferential of stator axis 66 and the periphery of input shaft 120, and Stator axis 66 and input shaft 120 can be supported with the relative rotation；Side (the transmission case 28 of bushing B2 in rotary shaft X-direction Side) be located at input shaft 120 outside oil circuit S4 (the 4th oil circuit)；And it is located at the other side, and become driving oil pressure to locking The oil circuit S5 (the 5th oil circuit) on the supply road of mechanism part 16, oil circuit 121 (internal oil passages) is by being inserted into the tubular of the oil circuit 121 Sleeve 7 be divided into the inside of oil circuit S6 (the 6th oil circuit) and sleeve 7 between the periphery of sleeve 7 and the inner circumferential of input shaft 120 Oil circuit S7 (the 7th oil circuit), in oil circuit 121, oil circuit S6 from rotary shaft X it is radial from, be arranged in from rotary shaft X-direction To the other side across the range of bushing B2, oil circuit S4 is connected with oil circuit S5 via oil circuit S6 for one side.

With this configuration, then drive oil pressure to the supply road (the second oil pressure path) of lockable mechanism portion 16 from oil circuit S4, Oil circuit S5 and oil circuit S6 avoid bushing B2 and are formed.

Therefore, if by the driving oil pressure of lockable mechanism portion 16 to oil circuit S4 supply, oil circuit S4 finally with piston 96 Grease chamber R connection, therefore, can with suitable control lockable mechanism portion 16 carry out lockup state and unlocked state switching.

Moreover, the oil in the region equipped with bushing B2 in oil circuit cannot be obtained if bushing B2 is located at the midway of oil circuit Road surface product then may hinder the component (bushing B2 etc.) of the movement of oil not to be located at oil circuit S4 to oil circuit S6 but if as above constituting Between, it can ensure oil circuit area throughout the overall length of flow path, therefore, oily supply will not lag.

Therefore, can with it is appropriate at the time of carry out switching of the lockable mechanism portion 16 to lockup state.

(8) be set as such as flowering structure: in the inner circumferential of the stator axis 66 configured along rotary shaft X, along around rotary shaft it is circumferential every The standard width of a room in an old-style house is blocked the area for being provided with these recess portions by the sleeve 67 of tubular every forming at least two recess portion for concaving towards peripheral side The inside in domain, and at least two oil circuit S3, S3a are formed in the radial thickness range of stator axis 66, stator axis will be located at The oil circuit S1 and oil circuit S2 in 66 outside are connected via oil circuit S3, and by the oil circuit S1a for being located at the outside of stator axis 66 and are located at The oil circuit S4 of the inside of stator axis 66 is via oil circuit S3a connection.

It, then can be from the arbitrary in the circumferential direction of rotary shaft X of the region for being provided with stator axis 66 when such constitute Position supplies the oil supplied from oil circuit S1, S1a, therefore, the inner or outer side of stator axis 66 to the inner or outer side of stator axis 66 Other oil circuits configuration freedom degree improve.

In addition, due to forming new oil circuit S3, S3a using the radial thickness of stator axis 66, so not needing to be arranged New oil circuit and increase stator axis 66 or positioned at the stator axis 66 outside diameter impeller of pump sleeve 33 outer diameter.Therefore, become The high oil path structure of the setting freedom degree in the discharge path of the oil pressure in fluid torque-converter 1.

(9) be set as such as flowering structure: the oil circuit S3a between the inner circumferential of stator axis 66 and the periphery of sleeve 67 is via set on stator The oil circuit 69a of axis 66 is connected to the oil circuit S1a in the outside for being located at stator axis 66, also, via the through hole 67c for being set to sleeve 67 It is connected to the oil circuit S4 for the inside for being located at stator axis 66.

In this way, by the way that through hole 67c is arranged in sleeve 67, being formed in stator axis 66 in oil path structure shown in Fig. 3 Oil circuit S3a between inner circumferential and sleeve 67 is with the oil circuit S1a positioned at the outside of stator axis 66 and positioned at the inside of stator axis 66 Oil circuit S4 connection, therefore, can according to require to be located at stator axis 66 inside oil circuit S4 suitably for oil supply.

(10) a kind of oil path structure, for Fluid-transmission portion 15 (torque-converters room) and (the clutch work of lockable mechanism portion 16 Fill in room) fluid torque-converter 1 oil path structure, which is characterized in that constitute the first oil circuit path containing oil circuit S1, S2, S3, structure At the second oil circuit path containing oil circuit S4, S5, S6, constitute the third oil circuit path containing oil circuit S7, the first oil pressure path with The oil pressure supply mouth in Fluid-transmission portion 15 and the side connection of oil pressure outlet, the second oil pressure path and lockable mechanism portion 16 connect It connects, third oil pressure path is connect with another party of the oil pressure supply mouth of torque-converters room and oil pressure outlet.

When such constitute, then can design alteration without fluid torque-converter 1 etc. and suitably carry out via fluid Transmitting of the rotary driving force of the driving source of driving section 15 to input shaft 120 and the rotary driving force via lockable mechanism portion 16 Transmitting to input shaft 120.

(11) it is set as such as flowering structure: in the oil circuit 121 of input shaft 120, the internal diameter wide diameter portion 121a quilt bigger than the oil circuit 121 It is set in the front end 120a prescribed limit away from input shaft 120, it is than the front end side 7a bigger that the side cardinal extremity 7b of sleeve 7 is provided with internal diameter Wide diameter portion 71, sleeve 7 is so that the front end side 7a is seamlessly crimped on the inner circumferential of oil circuit 121, while making the area equipped with wide diameter portion 71 The state that domain is seamlessly crimped on the inner circumferential of wide diameter portion 121a (thinner wall section 122) is arranged, in the wide diameter portion 121a in oil circuit 121 Space the space (oil circuit S6) of outside diameter and the space (oil circuit S7) of internal side diameter are divided by sleeve 7.

When such constitute, increase the outer diameter of input shaft 120 in order to which oil circuit S6 is arranged due to not needing, it is possible to no It significantly changes the design of existing fluid torque-converter and sets oil circuit S6.

Fig. 4 is the figure for illustrating the oil path structure of variation.

In the above-described embodiment, show following situations: a kind of (a) oil circuit is located at the outside of stator axis 66, In, it (is flowed being located to clip the oil circuit S1 of the side (28 side of transmission case) of bushing B1 and be located at the other side in rotary shaft X-direction 15 side of body driving section) oil circuit S2 via the oil circuit S3 connection between the inner circumferential for the periphery and stator axis 66 for being set to sleeve 67, In turn, (b) a kind of oil circuit is located at the outside of stator axis 66, wherein clips the one of bushing B1 for being located in rotary shaft X-direction The oil circuit S1a of side (28 side of transmission case) and oil circuit positioned at the inside of stator axis 66 are to prolong across the internal side diameter of bushing B3, B1 The oil circuit S4 for extending to the bushing B2 positioned at 15 side of Fluid-transmission portion, via the inner circumferential for the periphery and stator axis 66 for being set to sleeve 67 Between oil circuit S3a connection.

Here, the oil circuit being formed between sleeve 67 and stator axis 66 is not limited only to that the oil in the outside of stator axis 66 will be located at Mode that road is connected to each other or will be located at stator axis 66 outside oil circuit and oil circuit connection positioned at the inside of stator axis 66 Mode.

For example, as shown in Figure 4, or following structures: the oil circuit S3 between sleeve 67 and stator axis 66 is being rotated It is divided into two oil circuits in axis X-direction, an oil circuit S3b connects the oil circuit S1b for being located at the outside of stator axis 66 with oil circuit S2, another Oil circuit S3c connects the oil circuit S1c for being located at the outside of stator axis 66 with the oil circuit S4 positioned at the inside of stator axis 66.

In this case, in the inner circumferential of stator axis 66, set that there are two the areas for becoming thin-walled along rotary shaft X-direction interval Domain, and two oil circuits S3b, S3c are formed between sleeve 67 and stator axis 66.

Moreover, the inner circumferential of the supporting part 29 in transmission case 28, open up that there are two oil circuits along rotary shaft X-direction interval S1b, S1c, oil circuit 69b, the 69b for being connected to these oil circuits S1b, S1c with oil circuit S3b, S3c by by stator axis 66 along thickness side It penetrates through and is formed to (radial direction of rotary shaft X).

In addition, through hole 67d is provided in position corresponding with oil circuit S3c, by oil circuit S3c and oil circuit in sleeve 67 S4 is interconnected via through hole 67d.

Therefore, by the oil circuit S1b in the outside of stator axis 66 and oil circuit S2 via the oil circuit between sleeve 67 and stator axis 66 S3b connection, the oil circuit S4 of the inside of the oil circuit S1c and stator axis 66 in the outside of stator axis 66 via sleeve 67 and stator axis 66 it Between oil circuit S3c connection.

In this way, being formed in stator axis by suitably changing in the axial direction of rotary shaft X in oil path structure shown in Fig. 4 The position of the recess portion of 66 inner circumferential will be formed in the oil circuit interval between the inner circumferential of stator axis 66 and sleeve 67 in rotary shaft The axis of X set up it is multiple, can be according to requiring to the oil circuit S4 for the inside for being located at stator axis 66 or positioned at the outer of stator axis 66 The oil circuit S2 of side is suitably for oil supply.

(12) it is set as such as flowering structure: using the oil circuit S3c between the inner circumferential for the periphery and stator axis 66 for being formed in sleeve 67, The oil circuit S1c for being located at the outside of stator axis 66 is connected with the oil circuit S4 positioned at the inside of stator axis 66.

It is constituted when such, then can supply the oil circuit from 28 side of transmission case to the oil circuit S4 for the inside for being located at stator axis 66 The oil of S1c supply.

It is separately present as a result, in the axial direction of rotary shaft X, oil circuit S1c and oil circuit S4, bushing etc. can hinder the portion of the flowing of oil Part is located at inner circumferential or the periphery in the region between these oil circuits S1c and oil circuit S4 of stator axis 66, even if in this case, It also can be via the oil circuit S3c for the inside for being formed in stator axis 66, from oil circuit S1c to oil circuit S4 for oil supply.

(13) it is set as such as flowering structure: in the inner circumferential of the stator axis 66 configured along rotary shaft X, between separating along rotary axis direction The recess portion of peripheral side is concaved towards every formation at least two, the inside for being provided with the region of these recess portions is blocked with the sleeve 67 of tubular, At least two oil circuit S3b, S3c are formed in the radial thickness range of stator axis 66.

When such constitute, then can from the arbitrary position in the region for being provided with stator axis 66 of rotary shaft X-direction to The oil that the inner or outer side of stator axis 66 is supplied for being given to oil circuit S3b, S3c, other oil circuits of the inner or outer side of stator axis 66 Configuration freedom degree improve.

In addition, due to forming new oil circuit S3b, S3c using the radial thickness of stator axis 66, so not needing to set Set new oil circuit and increase stator axis 66 or positioned at the stator axis 66 outside diameter impeller of pump sleeve 33 outer diameter.Therefore, at For the high oil path structure of the setting freedom degree in the discharge path of the oil pressure of fluid torque-converter 1.

The recess portion of oil circuit is used to form and on rotary shaft X along axis in addition, being formed along the circumferentially spaced interval around rotary shaft X The case where being used to form the recess portion of oil circuit to interval formation is compared, due to the slot that division (segmentation) natively has, so right Design is advantageous.

In addition, the present invention is not limited to above-mentioned embodiment, it is various comprising that can carry out within the scope of its technical ideas Change, improved mode.

Claims (5)

1. a kind of oil path structure, which is characterized in that

With first axle,

There is first bearing, the first oil circuit and the second oil circuit in the periphery of the first axle,

There is first sleeve in the inner circumferential of the first axle,

There is third oil circuit between the first sleeve and the first axle,

First oil circuit via the third oil circuit and second oil circuit connection,

When from the radial direction of the first axle, the third oil circuit is overlapped with the first bearing,

There is the intermediary's oil circuit separated with the third oil circuit between the first axle and the first sleeve.

2. oil path structure as described in claim 1, which is characterized in that

There is the 4th oil circuit separated with the third oil circuit in the inner circumferential of the first sleeve,

4th oil circuit and intermediary's oil circuit connection.

3. a kind of oil path structure, which is characterized in that

With first axle,

There is first bearing, the first oil circuit and the second oil circuit in the periphery of the first axle,

There is first sleeve in the inner circumferential of the first axle,

There is third oil circuit between the first sleeve and the first axle,

First oil circuit via the third oil circuit and second oil circuit connection,

When from the radial direction of the first axle, the third oil circuit is overlapped with the first bearing,

There is the 4th oil circuit separated with the third oil circuit in the inner circumferential of the first sleeve,

There is the second axis in the inner circumferential of the first sleeve,

There is second sleeve in the inner circumferential of second axis,

There is second bearing and the 5th oil circuit in the periphery of second axis,

There is the 6th oil circuit between the second sleeve and second axis,

There is the 7th oil circuit in the inner circumferential of the second sleeve,

4th oil circuit via the 6th oil circuit and the 5th oil circuit connection,

When from the radial direction of second axis, the 6th oil circuit is overlapped with the second bearing.

4. oil path structure as claimed in claim 3, which is characterized in that

With fluid torque-converter, which has torque-converters room and clutch plunger room,

The first oil pressure path comprising first oil circuit, second oil circuit and third oil circuit is constituted,

The second oil pressure path comprising the 4th oil circuit, the 5th oil circuit and the 6th oil circuit is constituted,

The third oil pressure path comprising the 7th oil circuit is constituted,

First oil pressure path is connect with a side of the oil pressure supply mouth of the torque-converters room and oil pressure outlet,

Second oil pressure path is connect with another party of the oil pressure supply mouth of the torque-converters room and oil pressure outlet,

Third oil pressure path is connect with clutch plunger room.

5. oil path structure as described in claim 3 or 4, which is characterized in that

There is the intermediary's oil circuit separated with the third oil circuit between the first axle and the first sleeve,

4th oil circuit and intermediary's oil circuit connection.