Abstract: A power transmission device that includes a differential ring gear that meshes with a drive pinion gear to which power from a transmission is transmitted; a differential gear including a differential case coupled to the differential ring gear; a case that houses the differential ring gear and the differential gear; and a resinous partition that partitions an inside of the case into a differential chamber where the differential ring gear and the differential gear are placed and a working oil reservoir chamber to reserve working oil, wherein the partition includes a magnetic plate fixed to a lower part of a side surface thereof that faces the working oil reservoir chamber, and a magnet magnetically attracted and attached to the magnetic plate.

Abstract: A power transfer device that includes a transmission, a drive pinion gear to which power from the transmission is transferred, a differential ring gear disposed below the drive pinion gear and meshed with the drive pinion gear, a differential gear coupled to the differential ring gear, and a cover that covers at least a part of the differential gear.

Abstract: A reservoir plate for dividing an inside of a transmission case into a differential chamber and a hydraulic oil storage chamber includes: a cylindrical portion covering a part of a differential gear; a flange portion radially extending from the cylindrical portion; and a differential ring surrounding portion extending from an outer circumferential edge of the flange portion so that a part of a differential ring gear is covered from above without interfering with a drive pinion gear. The cylindrical portion, the flange portion, and the differential ring surrounding portion are integrally formed with each other. A seal member is interposed between the transmission case and the outer circumferential edge of the flange portion at least in the range below the differential ring surrounding portion.

Abstract: A power transmission device that includes a differential ring gear that meshes with a drive pinion gear to which power from a transmission is transmitted; a differential gear including a differential case coupled to the differential ring gear; a case that houses the differential ring gear and the differential gear; and a resinous partition that partitions an inside of the case into a differential chamber where the differential ring gear and the differential gear are placed and a working oil reservoir chamber to reserve working oil, wherein the partition includes a magnetic plate fixed to a lower part of a side surface thereof that faces the working oil reservoir chamber, and a magnet magnetically attracted and attached to the magnetic plate.

Abstract: A power transfer device that includes a transmission, a drive pinion gear to which power from the transmission is transferred, a differential ring gear disposed below the drive pinion gear and meshed with the drive pinion gear, a differential gear coupled to the differential ring gear, and a cover that covers at least a part of the differential gear.

Abstract: A reservoir plate for dividing an inside of a transmission case into a differential chamber and a hydraulic oil storage chamber includes: a cylindrical portion covering a part of a differential gear; a flange portion radially extending from the cylindrical portion; and a differential ring surrounding portion extending from an outer circumferential edge of the flange portion so that a part of a differential ring gear is covered from above without interfering with a drive pinion gear. The cylindrical portion, the flange portion, and the differential ring surrounding portion are integrally formed with each other. A seal member is interposed between the transmission case and the outer circumferential edge of the flange portion at least in the range below the differential ring surrounding portion.