Abstract: A bearing device for a vehicle wheel is provided with: an outer member; an inner member; a ball row; and a seal member for sealing the space between the outer member and the inner member due to a seal plate in which a sealing lip is formed being fitted into an opening in the outer member, a slinger being fitted on the inner member, and the sealing lip coming into contact with the slinger; wherein the slinger is formed so as to cover the end surface of the opening in the outer member, the slinger is provided with a cylindrical wall part extending in the axial direction of the inner member, a labyrinth is configured between the slinger and the end surface of the opening in the outer member, and another labyrinth is configured by the wall part being disposed between the outer member and the sealing lip.

Abstract: A wheel bearing apparatus has a seal (8) with a metal core (15) and a sealing member (6). The sealing member (6) has a first side lip (16a), a second side lip (16b) and a third side lip (19c). The first side lip (16a) opposes a metal annulus (17) via an axial gap. The second side lip (16b) is in sliding contact with a base (18), via an axial interference. The third side lip (19a) covers the outer surface of the metal core (15). The tip end of the third side lip (19a) is formed with a vertically flat surface opposing the inner-side surface (4b) of the wheel mounting flange (4, 28), via an axial gap (S1), to form a first labyrinth seal (20). The outer edge of the metal annulus (17) opposes the sealing member (6), via an axial gap, to form a second labyrinth seal (25).

Abstract: A rotation transmission device is provided in which a collision sound by an armature and a rotor is less likely to occur, and further the armature is stably attracted to the rotor. A buffer is provided between the armature and the rotor. The buffer is constituted by a metal annulus axially movably supported by the armature, and a rubber annulus configured such that as the armature approaches the rotor, the rubber annulus is axially compressed by the metal annulus and the armature. The rubber annulus has different axial thicknesses at different circumferential locations thereof such that when the degree of axial compression of the rubber annulus is large, the rubber annulus is axially compressed in its longer circumferential area than when the degree of axial compression of the rubber annulus is small.

Abstract: A bearing device for a vehicle wheel is provided with: an outer member; an inner member; a ball row; and a seal member for sealing the space between the outer member and the inner member due to a seal plate in which a sealing lip is formed being fitted into an opening in the outer member, a slinger being fitted on the inner member, and the sealing lip coming into contact with the slinger; wherein the slinger is formed so as to cover the end surface of the opening in the outer member, the slinger is provided with a cylindrical wall part extending in the axial direction of the inner member, a labyrinth is configured between the slinger and the end surface of the opening in the outer member, and another labyrinth is configured by the wall part being disposed between the outer member and the sealing lip.

Abstract: A wheel bearing apparatus has a seal (8) with a metal core (15) and a sealing member (6). The metal core (15) is fit into an outer-side end inner circumference of the outer member (10). The sealing member (16) with a first side lip (16a) is adhered to the metal core. The first side lip (16a) is inclined radially outward to oppose a metal annulus (17) mounted on a base (18) of a wheel mounting flange (4), via an axial gap. The sealing member second side lip (16b) is formed radially inward from the first side lip (16a) and is in sliding contact with the base (18), via an axial interference. The sealing member third side lip (19a) is inclined radially outward from a base (19), covering the outer surface of the metal core (15), toward the wheel mounting flange (4). The tip end of the third side lip (19a) is formed with a vertically flat surface opposing the inner-side surface (4b) of the wheel mounting flange (4, 28), via an axial gap (S1), to form a first labyrinth seal (20).

Abstract: A rotation transmission device is provided in which a collision sound by an armature and a rotor is less likely to occur, and further the armature is stably attracted to the rotor. A buffer is provided between the armature and the rotor. The buffer is constituted by a metal annulus axially movably supported by the armature, and a rubber annulus configured such that as the armature approaches the rotor, the rubber annulus is axially compressed by the metal annulus and the armature. The rubber annulus has different axial thicknesses at different circumferential locations thereof such that when the degree of axial compression of the rubber annulus is large, the rubber annulus is axially compressed in its longer circumferential area than when the degree of axial compression of the rubber annulus is small.