A torque transmission apparatus includes first and second torque transmission members 3, 5, a frictional clutch 7 for transmitting a torque between the torque transmission members 3, 5, a stationary housing 11 accommodating a coupling 9, a spatial part for enclosing oil in the stationary housing 11
A torque transmission apparatus includes first and second torque transmission members 3, 5, a frictional clutch 7 for transmitting a torque between the torque transmission members 3, 5, a stationary housing 11 accommodating a coupling 9, a spatial part for enclosing oil in the stationary housing 11 and an opening 15 formed in a part of the coupling 9 so that the oil in the stationary housing 11 is introduced into the coupling 9.
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1. A torque transmission apparatus comprising: a coupling having first and second torque transmission members and a frictional clutch for transmitting a torque between the first torque transmission member and the second torque transmission member; anda stationary housing accommodating the coupling,w
1. A torque transmission apparatus comprising: a coupling having first and second torque transmission members and a frictional clutch for transmitting a torque between the first torque transmission member and the second torque transmission member; anda stationary housing accommodating the coupling,wherein the coupling includes a first opening for introducing oil enclosed in the stationary housing into the coupling,the stationary housing includes first and second radial sidewalls and a first circumferential wall connecting the first and second radial sidewalls with each other,the first torque transmission member includes third and fourth radial sidewalls and a second circumferential wall connecting the third and fourth radial sidewalls with each other,the torque transmission apparatus has a spatial part defined by the first and third radial sidewalls, the second and fourth radial sidewalls and the first and second circumferential walls to enclose a predetermined amount of oil therein, andthe spatial part includes an annular spatial part where a rotation of the first torque transmission member allows the oil to flow between the first circumferential wall and the second circumferential wall rotationally and flow along the first circumferential wall upwardly, andthe first circumferential wall is formed so as to gradually increase a diameter from one side of the first torque transmission member in the direction of the rotating axis toward the other side. 2. A torque transmission apparatus comprising: a coupling having first and second torque transmission members and a frictional clutch for transmitting a torque between the first torque transmission member and the second torque transmission member; anda stationary housing accommodating the coupling,wherein the coupling includes a first opening for introducing oil enclosed in the stationary housing into the coupling,the stationary housing includes first and second radial sidewalls and a first circumferential wall connecting the first and second radial sidewalls with each other,the first torque transmission member includes third and fourth radial sidewalls and a second circumferential wall connecting the third and fourth radial sidewalls with each other,the torque transmission apparatus has a spatial part defined by the first and third radial sidewalls, the second and fourth radial sidewalls and the first and second circumferential walls to enclose a predetermined amount of oil therein, andthe spatial part includes an annular spatial part where a rotation of the first torque transmission member allows the oil to flow between the first circumferential wall and the second circumferential wall rotationally and flow along the first circumferential wall upwardly, andthe second circumferential wall has a large diameter part that narrows an opposing gap between the second circumferential wall and the first circumferential wall. 3. The torque transmission apparatus of any one of claims 1 and 2, further comprising: a first oil flow path arranged between the first circumferential wall formed in the stationary housing and the second circumferential wall formed in the first torque transmission member to make the oil flow rotationally;a converting member arranged in the first oil flow path to convert the flowing direction of the oil rotationally flowing in the first oil flow path to the direction of a rotating axis; anda second oil flow path provided in at least either the stationary housing or the first torque transmission member to make the oil flowing in the direction of the rotating axis flow radially inward. 4. The torque transmission apparatus of any one of claims 1 and 2, wherein the annular spatial part is adapted so as to allow the oil to rotationally flow up to the upside while remaining a fluid power thereof. 5. The torque transmission apparatus of any one of claims 1 and 2, wherein the first circumferential wall is provided with a protrusion which projects radially inward thereby to narrow an opposing gap between the first circumferential wall and the second circumferential wall. 6. The torque transmission apparatus of any one of claims 1 and 2, wherein the frictional clutch has a plurality of fastening members arranged on the inner circumferential side of the second circumferential wall, while the first opening is formed so as to expose the plurality of fastening members along the direction of the rotating axis of the second circumferential wall. 7. A torque transmission apparatus comprising: a coupling having first and second torque transmission members and a frictional clutch for transmitting a torque between the first torque transmission member and the second torque transmission member; anda stationary housing accommodating the coupling,wherein the coupling includes a first opening for introducing oil enclosed in the stationary housing into the coupling,the stationary housing includes first and second radial sidewalls and a first circumferential wall connecting the first and second radial sidewalls with each other,the first torque transmission member includes third and fourth radial sidewalls and a second circumferential wall connecting the third and fourth radial sidewalls with each other,the torque transmission apparatus has a spatial part defined by the first and third radial sidewalls, the second and fourth radial sidewalls and the first and second circumferential walls to enclose a predetermined amount of oil therein, andthe spatial part includes an annular spatial part where a rotation of the first torque transmission member allows the oil to flow between the first circumferential wall and the second circumferential wall rotationally and flow along the first circumferential wall upwardly,the coupling is arranged between the second sidewall and the fourth sidewall and also fixed to the second sidewall so as to be unable to rotate in relation to the second sidewall, the coupling having an actuator for fastening the frictional clutch,the first circumferential wall includes a protrusion that is extended along a rotating axis of the first torque transmission member thereby to convert a rotational flow of the oil and successively make the oil flow to an interval between the actuator and the second radial sidewall,a second opening for introducing the oil flowing between the actuator and the second radial sidewall into the coupling is provided between an inner circumference of the fourth radial sidewall and the second torque transmission member, andthe protrusion is arranged on the upside of the first circumferential wall. 8. A torque transmission apparatus comprising: a coupling having first and second torque transmission members and a frictional clutch for transmitting a torque between the first torque transmission member and the second torque transmission member; anda stationary housing accommodating the coupling,wherein the coupling includes a first opening for introducing oil enclosed in the stationary housing into the coupling,the stationary housing includes first and second radial sidewalls and a first circumferential wall connecting the first and second radial sidewalls with each other,the first torque transmission member includes third and fourth radial sidewalls and a second circumferential wall connecting the third and fourth radial sidewalls with each other,the torque transmission apparatus has a spatial part defined by the first and third radial sidewalls, the second and fourth radial sidewalls and the first and second circumferential walls to enclose a predetermined amount of oil therein, andthe spatial part includes an annular spatial part where a rotation of the first torque transmission member allows the oil to flow between the first circumferential wall and the second circumferential wall rotationally and flow along the first circumferential wall upwardly,the coupling is arranged between the second sidewall and the fourth sidewall and also fixed to the second sidewall so as to be unable to rotate in relation to the second sidewall, the coupling having an actuator for fastening the frictional clutch,the first circumferential wall includes a protrusion that is extended along a rotating axis of the first torque transmission member thereby to convert a rotational flow of the oil and successively make the oil flow to an interval between the actuator and the second radial sidewall,a second opening for introducing the oil flowing between the actuator and the second radial sidewall into the coupling is provided between an inner circumference of the fourth radial sidewall and the second torque transmission member, andthe first opening is formed in the second circumferential wall so as to be able to oppose the protrusion when the first torque transmission member rotates. 9. A torque transmission apparatus comprising: a coupling having first and second torque transmission members and a frictional clutch for transmitting a torque between the first torque transmission member and the second torque transmission member; anda stationary housing accommodating the coupling,wherein the coupling includes a first opening for introducing oil enclosed in the stationary housing into the coupling,the stationary housing includes first and second radial sidewalls and a first circumferential wall connecting the first and second radial sidewalls with each other,the first torque transmission member includes third and fourth radial sidewalls and a second circumferential wall connecting the third and fourth radial sidewalls with each other,the torque transmission apparatus has a spatial part defined by the first and third radial sidewalls, the second and fourth radial sidewalls and the first and second circumferential walls to enclose a predetermined amount of oil therein, andthe spatial part includes an annular spatial part where a rotation of the first torque transmission member allows the oil to flow between the first circumferential wall and the second circumferential wall rotationally and flow along the first circumferential wall upwardly,the coupling is arranged between the second sidewall and the fourth sidewall and also fixed to the second sidewall so as to be unable to rotate in relation to the second sidewall, the coupling having an actuator for fastening the frictional clutch,the first circumferential wall includes a protrusion that is extended along a rotating axis of the first torque transmission member thereby to convert a rotational flow of the oil and successively make the oil flow to an interval between the actuator and the second radial sidewall, anda second opening for introducing the oil flowing between the actuator and the second radial sidewall into the coupling is provided between an inner circumference of the fourth radial sidewall and the second torque transmission member, andthe protrusion is extended so as to be able to oppose the plurality of fastening members. 10. A torque transmission apparatus comprising: a coupling having first and second torque transmission members and a frictional clutch for transmitting a torque between the first torque transmission member and the second torque transmission member; anda stationary housing accommodating the coupling,wherein the coupling includes a first opening for introducing oil enclosed in the stationary housing into the coupling,the stationary housing includes first and second radial sidewalls and a first circumferential wall connecting the first and second radial sidewalls with each other,the first torque transmission member includes third and fourth radial sidewalls and a second circumferential wall connecting the third and fourth radial sidewalls with each other,the torque transmission apparatus has a spatial part defined by the first and third radial sidewalls, the second and fourth radial sidewalls and the first and second circumferential walls to enclose a predetermined amount of oil therein, andthe spatial part includes an annular spatial part where a rotation of the first torque transmission member allows the oil to flow between the first circumferential wall and the second circumferential wall rotationally and flow along the first circumferential wall upwardly,the coupling is arranged between the second sidewall and the fourth sidewall and also fixed to the second sidewall so as to be unable to rotate in relation to the second sidewall, the coupling having an actuator for fastening the frictional clutch,the first circumferential wall includes a protrusion that is extended along a rotating axis of the first torque transmission member thereby to convert a rotational flow of the oil and successively make the oil flow to an interval between the actuator and the second radial sidewall, anda second opening for introducing the oil flowing between the actuator and the second radial sidewall into the coupling is provided between an inner circumference of the fourth radial sidewall and the second torque transmission member, andthe protrusion has an end face whose width in the rotating direction is narrower than a width of the first opening in the rotating direction. 11. A torque transmission apparatus comprising: a coupling having first and second torque transmission members and a frictional clutch for transmitting a torque between the first torque transmission member and the second torque transmission member; anda stationary housing accommodating the coupling,wherein the coupling includes a first opening for introducing oil enclosed in the stationary housing into the coupling,the stationary housing includes first and second radial sidewalls and a first circumferential wall connecting the first and second radial sidewalls with each other,the first torque transmission member includes third and fourth radial sidewalls and a second circumferential wall connecting the third and fourth radial sidewalls with each other,the torque transmission apparatus has a spatial part defined by the first and third radial sidewalls, the second and fourth radial sidewalls and the first and second circumferential walls to enclose a predetermined amount of oil therein, andthe spatial part includes an annular spatial part where a rotation of the first torque transmission member allows the oil to flow between the first circumferential wall and the second circumferential wall rotationally and flow along the first circumferential wall upwardly,the coupling is arranged between the second sidewall and the fourth sidewall and also fixed to the second sidewall so as to be unable to rotate in relation to the second sidewall, the coupling having an actuator for fastening the frictional clutch,the first circumferential wall includes a protrusion that is extended along a rotating axis of the first torque transmission member thereby to convert a rotational flow of the oil and successively make the oil flow to an interval between the actuator and the second radial sidewall,a second opening for introducing the oil flowing between the actuator and the second radial sidewall into the coupling is provided between an inner circumference of the fourth radial sidewall and the second torque transmission member, andthe protrusion has a side face inclined from the direction of the rotating axis of the first torque transmission member toward the rotating direction so as to convert the flowing direction of the oil from the rotating direction to the direction of the rotating axis. 12. A torque transmission apparatus comprising: a coupling having first and second torque transmission members and a frictional clutch for transmitting a torque between the first torque transmission member and the second torque transmission member; anda stationary housing accommodating the coupling,wherein the coupling includes a first opening for introducing oil enclosed in the stationary housing into the coupling,the stationary housing includes first and second radial sidewalls and a first circumferential wall connecting the first and second radial sidewalls with each other,the first torque transmission member includes third and fourth radial sidewalls and a second circumferential wall connecting the third and fourth radial sidewalls with each other,the torque transmission apparatus has a spatial part defined by the first and third radial sidewalls, the second and fourth radial sidewalls and the first and second circumferential walls to enclose a predetermined amount of oil therein, andthe spatial part includes an annular spatial part where a rotation of the first torque transmission member allows the oil to flow between the first circumferential wall and the second circumferential wall rotationally and flow along the first circumferential wall upwardly,the coupling is arranged between the second sidewall and the fourth sidewall and also fixed to the second sidewall so as to be unable to rotate in relation to the second sidewall, the coupling having an actuator for fastening the frictional clutch,the first circumferential wall includes a protrusion that is extended along a rotating axis of the first torque transmission member thereby to convert a rotational flow of the oil and successively make the oil flow to an interval between the actuator and the second radial sidewall,a second opening for introducing the oil flowing between the actuator and the second radial sidewall into the coupling is provided between an inner circumference of the fourth radial sidewall and the second torque transmission member, andthe protrusion is formed by a separated body from the first circumferential wall and fixed to the inner circumferential side of the first circumferential wall. 13. A torque transmission apparatus comprising: a coupling having first and second torque transmission members and a frictional clutch for transmitting a torque between the first torque transmission member and the second torque transmission member; anda stationary housing accommodating the coupling,wherein the coupling includes a first opening for introducing oil enclosed in the stationary housing into the coupling,the stationary housing includes first and second radial sidewalls and a first circumferential wall connecting the first and second radial sidewalls with each other,the first torque transmission member includes third and fourth radial sidewalls and a second circumferential wall connecting the third and fourth radial sidewalls with each other,the torque transmission apparatus has a spatial part defined by the first and third radial sidewalls, the second and fourth radial sidewalls and the first and second circumferential walls to enclose a predetermined amount of oil therein, andthe spatial part includes an annular spatial part where a rotation of the first torque transmission member allows the oil to flow between the first circumferential wall and the second circumferential wall rotationally and flow along the first circumferential wall upwardly,the coupling is arranged between the second sidewall and the fourth sidewall and also fixed to the second sidewall so as to be unable to rotate in relation to the second sidewall, the coupling having an actuator for fastening the frictional clutch,the first circumferential wall includes a protrusion that is extended along a rotating axis of the first torque transmission member thereby to convert a rotational flow of the oil and successively make the oil flow to an interval between the actuator and the second radial sidewall,a second opening for introducing the oil flowing between the actuator and the second radial sidewall into the coupling is provided between an inner circumference of the fourth radial sidewall and the second torque transmission member, andthe protrusion has a collecting wall part for collecting the oil. 14. The torque transmission apparatus of any one of claims 7, 8, 9, 10, 11, 12, and 13, wherein the protrusion has a side face formed to convert a flowing of the oil from the rotating direction to the radial direction. 15. The torque transmission apparatus of any one of claims 7, 8, 9, 10, 11, 12, and 13, wherein the actuator is shaped to be annular,the spatial part is compartmentalized in the direction of the rotating axis through seals, and the spatial part has a second spatial part formed on the protrusion to communicate with the annular spatial part. 16. The torque transmission apparatus of claim 15, wherein at least either the first radial sidewall or the actuator has a second opening formed to communicate the annular spatial part with the second spatial part. 17. A torque transmission apparatus comprising: a coupling having first and second torque transmission members and a frictional clutch for transmitting a torque between the first torque transmission member and the second torque transmission member; anda stationary housing accommodating the coupling, wherein the coupling includes a first opening for introducing oil enclosed in the stationary housing into the coupling, andan inner circumferential side of a second circumferential wall,a first frictional clutch and a second frictional clutch as the frictional clutch; anda cam mechanism that converts a fastening force of the second frictional clutch to an axial thrust force and also fastens the second frictional clutch due to the axial thrust force, whereinthe first opening is formed in the second circumferential wall so as to expose at least two of the first frictional clutch, the second frictional clutch and the cam mechanism. 18. The torque transmission apparatus of claim 17, wherein the stationary housing includes first and second housing parts.
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