Linear operation ball bearing

Claim 2

Alinear motion ball bearing having a pair of axial bearing surfaces of a concave cross section of a radius of curvature which is slightly greater than the radius of the balls of the linear ball bearing, formed in each of the opposed side surfaces of the.bearing member and the rail base in-an upper-and-lower relation, in which the distance-between the centers of curvature of the paired.bearing surfaces formed in the bearing member and the distance.between the centers of curvature of the paired bearing surfaces formed in the rail base are different from each other.

Claim 3

A linear.motion ball bearing according to Claim 1, wherein the paired upper and the lower bearing surfaces formed in the bearing member are disposed so that the distance. between the centers of curvature thereof is larger or smaller than the design value thereby applying a preload to the linear ball bearing.

Claim 4

A linear motion ball bearing having a pair of axial bearing surfaces of a concave cross section of a radius of curvature which is slightly greater than the radius of the balls of the linear ball bearing, formed in each of the opposed side surfaces of the.bearing member and the rail base. in an upper-and-lower relation, in which a ball retainer is provided between the paired upper and the lower bearing surfaces of the bearing member to prevent the balls from falling off when the. bearing member is separated from the. rail base by the cooperation of the ball retainer. and the. bearing surfaces.

Claim 5

A linear motion ball bearing having a pair of axial bearing surfaces of a concave cross section of a radius of curvature which is slightly greater than the radius of the balls of the linear ball bearing, formed in each of the opposed side surfaces of the.bearing member and the rail base. in an upper-and-lower relation, in which a ball retainer is provided between the paired upper and the lower bearing surfaces of the bearing member to prevent the balls from falling off when the. bearing member is separated from the. rail base by the cooperation of the ball retainer. and the. bearing surfaces.

Claim 6

A linear motion ball bearing having a ball retainer having ball retaining. surfaces of a curved cross section extending laterally symmetrically with respect to the center axis thereof, in which the. ball retainer is provided, at the opposite ends thereof, with projections which fit in holes formed in the. ball returning caps respectively.

Claim 7

A linear motion ball bearing having a ball retainer having ball retaining. surfaces of a curved cross section extending laterally symmetrically with respect to the center axis thereof, in which the. ball retainer is provided, at the opposite ends thereof, with projections which fit in holes formed in the. ball returning caps respectively.

Claim 8

A ball returning cap for a linear motion ball bearing, having a through hole formed therein from the inner surface having ball returning grooves to the outer surface, a pair of grooves extended laterally from the outer end of the through hole, through holes formed from the respective ends of the grooves to the inner side and grooves formed from the inner ends of the through holes to the corresponding ball returning grooves.

Claim 9

A ball returning cap for a linear motion ball bearing, having a through hole formed therein from the inner surface having ball returning grooves to the outer surface, a pair of grooves extended laterally from the outer end of the through hole, through holes formed from the respective ends of the grooves to the inner side and grooves formed from the inner ends of the through holes to the corresponding ball returning grooves.

Claim 10

A sealing device for a linear motion ball bearing , comprising in an integral construction a pair of side plates provided with sealing members for sealing in the axial direction , and a pair of bottom plates provided with sealing members for sealing in the vertical direction.

Claim 11

A sealing device for a linear motion ball bearing , comprising in an integral construction a pair of side plates provided with sealing members for sealing in the axial direction , and a pair of bottom plates provided with sealing members for sealing in the vertical direction.

Claim 12

A linear motion ball bearing having a pair of. axial bearing surfaces of a cross section of: a radius of curvature which is slightly greater than the radius of the ball, formed in each of the opposed side surfaces of a bearing member and a rail base. , with the distance between the centers of curvature of the upper and the lower bearing surfaces formed in the bearing member and the distance between the centers of curvature of the upper and- the lower. bearing surfaces formed in the. rail base being different from each other, in which the distance between the centers of curvature of the upper and the lower bearing surfaces formed in the bearing member is designed so as to be larger or smaller'than the theoretical value for assembling the components with zero clearance, thereby applying a preload to the bearing.

Claim 13

A linear motion ball bearing having a pair of. axial bearing surfaces of a cross section of: a radius of curvature which is slightly greater than the radius of the ball, formed in each of the opposed side surfaces of a bearing member and a rail base. , with the distance between the centers of curvature of the upper and the lower bearing surfaces formed in the bearing member and the distance between the centers of curvature of the upper and- the lower. bearing surfaces formed in the. rail base being different from each other, in which the distance between the centers of curvature of the upper and the lower bearing surfaces formed in the bearing member is designed so as to be larger or smaller'than the theoretical value for assembling the components with zero clearance, thereby applying a preload to the bearing.

Claim 14

A ball retainer for a linear motion ball bearing, having curved.ball retaining surfaces of a cross section extending laterally symmetrically with respect to the center axis thereof, in which projections to be fitted in the corresponding holes formed in ball returning caps respectively are formed at the opposite ends thereof.

Claim 15

A ball retainer for a linear motion ball bearing, having curved.ball retaining surfaces of a cross section extending laterally symmetrically with respect to the center axis thereof, in which projections to be fitted in the corresponding holes formed in ball returning caps respectively are formed at the opposite ends thereof.

Claim 16

A ball returning cap for a linear motion ball bearing, having a through hole formed therein from the inner surface having ball returning grooves to the outer surface, a pair of grooves extended laterally from the outer end of the through hole, through holes formed from the respective ends of the grooves to the inner surface and grooves formed from the inner ends of the through holes to the corresponding ball returning grooves.

Claim 17

A ball returning cap for a linear motion ball bearing, having a through hole formed therein from the inner surface having ball returning grooves to the outer surface, a pair of grooves extended laterally from the outer end of the through hole, through holes formed from the respective ends of the grooves to the inner surface and grooves formed from the inner ends of the through holes to the corresponding ball returning grooves.

Claim 18

A sealing device for a linear motion ball bearing, comprising in an integral construction a pair of side plates provided with sealing members for sealing in the axial direction, and. a pair of. bottom plates provided with sealing members for sealing in the vertical direction.

Claim 19

A sealing device for a linear motion ball bearing, comprising in an integral construction a pair of side plates provided with sealing members for sealing in the axial direction, and. a pair of. bottom plates provided with sealing members for sealing in the vertical direction.