Rotation transmission device

摘要

A rotation transmission device includes a two-way clutch and an electromagnetic clutch for engaging and disengaging the two-way clutch and which can be easily assembled without the need for a shim to prevent movements of the clutches. The two-way clutch (10) and the electromagnetic clutch (50) are mounted in a housing (3) including at one end a positioning arrangement (5). The two-way clutch (10) and the electromagnetic clutch (5) are biased by an elastic member (7) supported by the positioning arrangement (5) toward an anti-separation ring (8) provided on the inner periphery of the housing (3) at the other end thereof, and are thus prevented from moving.

主权项

1. A rotation transmission device comprising:
an input shaft; an output shaft arranged coaxial with the input shaft; a two-way clutch for selectively transmitting torque between the input shaft and the output shaft; an electromagnetic clutch for selectively engaging and disengaging the two-way clutch, wherein the electromagnetic clutch includes an electromagnet and is configured to disengage the two-way clutch when the electromagnet is de-energized; a tubular housing in which the two-way clutch and the electromagnetic clutch are received, wherein the housing has a first opening at a first end of the housing and a second opening at a second end of the housing which is opposite to the first end; a positioning part provided in the housing near the first end to limit movement of the two-way clutch in a direction away from the second opening and toward the first opening; and an anti-separation ring provided on an inner periphery of the housing at the second end of the housing to limit movement of the electromagnetic clutch in a direction away from the first opening and toward the second opening so as to prevent the electromagnetic clutch from coming out of the housing through the second end of the housing; wherein an elastic configuration is provided to bias the two-way clutch and the electromagnetic clutch toward one of the first and second ends of the housing, said elastic configuration being constituted by one of the anti-separation ring being configured to bias the two-way clutch and the electromagnetic clutch toward the positioning part, and an elastic member separate from the anti-separation ring and being configured to bias the two-way clutch and the electromagnetic clutch toward the anti-separation ring; wherein the two-way clutch comprises an outer ring provided at an end of the output shaft, an inner ring provided at an end of the input shaft, and a control retainer member and a rotary retainer member which are disposed between opposed portions of the outer ring and the inner ring, wherein the control retainer member includes a plurality of circumferentially spaced apart first bars, wherein the rotary retainer member includes a plurality of circumferentially spaced apart second bars which are arranged circumferentially alternating with the first bars, whereby pockets are defined between circumferentially adjacent pairs of the first and second bars, wherein the two-way clutch further comprises a plurality of engaging elements each two of which are mounted in one of the pockets, and elastic elements each mounted in one of the pockets and biasing the two engaging elements in the one of the pockets away from each other, wherein the control retainer member and the rotary retainer member are configured to be rotated relative to each other in a direction in which circumferential widths of the pockets increase until the engaging elements engage an inner periphery of the outer ring and an outer periphery of the inner ring, under the biasing force of the elastic elements; and wherein the electromagnetic clutch comprises an armature coupled to the control retainer member, a rotor facing the armature in an axial direction, and an electromagnet facing the rotor in the axial direction and configured to attract the armature to the rotor when the electromagnet is energized such that the control retainer member and the rotary retainer member are rotated relative to each other in a direction in which the circumferential widths of the pockets decrease, until the engaging elements disengage.