Differential gears with a mechanism for controlling differential motion

摘要

A differential device has a clutch which is provided between at least one side gear and a differential case to limit relative rotation of the side gear and the differential case. The clutch includes one or more inner pawl discs and outer pawl discs alternately arranged in an axial direction of the side gear between an inner peripheral surface of the differential case and an outer peripheral surface of the side gear. The side gear includes a gear-side fit part extending in the axial direction to which the inner pawl disc is concave-convex fitted. The differential case includes a case-side fit parts extending in the axial direction to which the outer pawl clutch is concave-convex fitted. At least one of the gear-side fit part and the case-side fit part is formed in a spiral shape angled with respect to the axial direction.

主权项

1. A differential device with a limited-slip differential mechanism, comprising: a differential case that rotates around right and left axles by a driving force from an engine; a pair of right and left side gears that are provided in the differential case at ends of the right and left axles so as to be incapable of relative rotation; a pinion shaft that is provided orthogonal to the axles between the pair of right and left side gears and rotates together with the differential case; and at least a pair of pinion gears that are provided rotatably at the pinion shaft and engage with the pair of right and left side gears, wherein
a clutch means is provided between at least one of the side gears and the differential case to limit relative rotation of the side gear and the differential case, the clutch means includes one or more inner pawl discs and outer pawl discs that are alternately arranged in the axial direction of the side gear between an inner peripheral surface of the differential case and an outer peripheral surface of the side gear, the side gears include a gear-side fit part extending in the axial direction to which the inner pawl disc is concave-convex fitted, the differential case includes a case-side fit part extending in the axial direction to which the outer pawl disc is concave-convex fitted, and at least one of the gear-side fit part and the case-side fit part is formed in a spiral shape angled with respect to the axial direction, and wherein a spiral angle with respect to the axial direction is set within the range of 20 to 60°.