US 11,940,043 B2
Baffle plate and seal member of a driving force transmission device
Tsutomu Itou, Fujinomiya (JP)
Assigned to JATCO LTD, Fuji (JP); and NISSAN MOTOR CO., LTD., Fuji (JP)
Appl. No. 17/055,718
Filed by JATCO Ltd, Fuji (JP); and NISSAN MOTOR CO., LTD., Yokohama (JP)
PCT Filed May 13, 2019, PCT No. PCT/JP2019/018963
§ 371(c)(1), (2) Date Nov. 16, 2020,
PCT Pub. No. WO2019/221068, PCT Pub. Date Nov. 21, 2019.
Claims priority of application No. 2018-095159 (JP), filed on May 17, 2018.
Prior Publication US 2021/0190200 A1, Jun. 24, 2021
Int. Cl. F16H 57/04 (2010.01); F16H 61/00 (2006.01)
CPC F16H 57/0423 (2013.01) [F16H 57/045 (2013.01); F16H 57/0447 (2013.01); F16H 2061/0037 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A driving force transmission device comprising:
a baffle plate portion including a pair of baffle plates and a seal member disposed in a region between the pair of baffle plates;
a rotating member disposed within a rotating member chamber that is a space surrounded by the baffle plate portion;
an oil pump that serves as a source of oil for lubrication supplied to the rotating member; and
an oil pan in which the oil is stored and from which the oil pump sucks the oil, wherein
at least one of the following (i) through (iii) includes material configured to shrink as an oil temperature decreases:
(i) one of the pair baffle plates,
(ii) the other one of the pair of baffle plates, or
(iii) the seal member, and
the baffle plate portion is dimensioned such that an outer peripheral edge of the seal member is pressed against an outer wall portion of the baffle plate portion covering an outer periphery of the rotating member when the oil temperature is equal to or higher than a predetermined oil temperature and an aperture is formed in the region between the pair of baffle plates to stop sealing by the seal member when the oil temperature is less than the predetermined oil temperature,
the baffle plate portion has a rib formed of polymer material configured to shrink as the oil temperature decreases,
at least one of the pair of baffle plates has a plate portion adjacent to the aperture, and
when the plate portion is partitioned into two regions in the axial direction of the rotating member, an area where the rib overlaps with one of the two regions not adjacent to the aperture is larger than an area where the rib overlaps with the other one of the two regions adjacent to the aperture.