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 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 vehicle wheel bearing apparatus has an inner-side seal with an annular slinger and a sealing plate. The slinger has a cylindrical portion and a standing portion. The sealing plate has a metal core and a sealing member. The metal core is press-fit into the inner circumference of an end of the outer member. The sealing member has a pair of side lips that angularly extend radially outward. The sealing member is adapted to be in sliding contact with the standing portion of the slinger, via a predetermined axial interface. The sealing member is secured to the metal core while extending over the outer circumference of an end of the metal core. The sealing member is formed with an outer circumferential lip extending radially outward from its circumferential end. The lip has a substantially L-shaped longitudinal section and is adapted to be fit in a gap between the inner-side end of the outer member and a flange portion of the knuckle.

Abstract: A wheel bearing apparatus has a protecting cover formed from non-magnetic steel sheet with a cup-shaped configuration. The protective cover has a cylindrical fitting portion, a disk-shaped shield portion, a radially reducing portion, a stepped portion and a bottom portion. The cylindrical fitting portion is press-fit into the inner circumference of the inner-side end of the outer member. The disk-shaped shielding portion extends radially inward from the fitting portion, via the radially reducing portion. The inner-side surface of the shielding portion is arranged close to or in contact with a rotation speed detecting sensor. The bottom portion is continuous with the shielding portion, via the stepped portion to close the inner-side end of the inner member. A full deflection of the side surface of the shielding portion that is caused by a load the same as that applied to the protecting cover when it is press-fit into the outer member is limited to a predetermined value or less.

Abstract: A vehicle wheel bearing apparatus has an inner-side seal with an annular slinger and a sealing plate. The slinger has a cylindrical portion and a standing portion. The sealing plate has a metal core and a sealing member. The metal core is press-fit into the inner circumference of an end of the outer member. The sealing member has a pair of side lips that angularly extend radially outward. The sealing member is adapted to be in sliding contact with the standing portion of the slinger, via a predetermined axial interface. The sealing member is secured to the metal core while extending over the outer circumference of an end of the metal core. The sealing member is formed with an outer circumferential lip extending radially outward from its circumferential end. The lip has a substantially L-shaped longitudinal section and is adapted to be fit in a gap between the inner-side end of the outer member and a flange portion of the knuckle.

Abstract: A wheel bearing apparatus has a protecting cover formed from non-magnetic steel sheet with a cup-shaped configuration. The protective cover has a cylindrical fitting portion, a disk-shaped shield portion, a radially reducing portion, a stepped portion and a bottom portion. The cylindrical fitting portion is press-fit into the inner circumference of the inner-side end of the outer member. The disk-shaped shielding portion extends radially inward from the fitting portion, via the radially reducing portion. The inner-side surface of the shielding portion is arranged close to or in contact with a rotation speed detecting sensor. The bottom portion is continuous with the shielding portion, via the stepped portion to close the inner-side end of the inner member. A full deflection of the side surface of the shielding portion that is caused by a load the same as that applied to the protecting cover when it is press-fit into the outer member is limited to a predetermined value or less.