Method of measuring a clearance of a hub bearing for vehicles
The present invention relates to a method of measuring a clearance of a hub bearing for vehicles. A hub is fixed to a lower jig when a row of hub-side balls is disposed and an outer ring is disposed on an outer periphery of the hub and a row of inner ring-side balls and an inner ring are disposed. A press-fit jig is contacted to the inner ring and a load of less than 5 kgf is applied to an outer surface of the outer ring to prevent its vibration and movement. A gauge is installed to a portion of the outer ring. The inner ring is gradually press-fitted by the jig. An amount of press-fit of the inner ring is measured from when the gauge begins to move when press-fitting of the inner ring is completed. The amount of clearance is simply measured.
1. A method of measuring a clearance of a hub bearing for vehicles when assembling the hub bearing, comprising:
fixing a hub ( 10 ) to a frame ( 60 ) when an inner ring ( 20 ) is disposed on an outer periphery of the hub ( 10 ) to be mounted to an axle and an outer ring ( 30 ) is disposed to be opposed to an upper portion of the inner ring ( 20 ) and a row of balls ( 40 ) is disposed between the outer ring ( 30 ) and the inner ring ( 20 ) opposed thereto (S 100 );
applying a load to an outer surface of the outer ring ( 30 ) so as to prevent a vibration and a movement of the outer ring ( 30 ) (S 110 );
contacting a press-fit jig ( 50 ) to an outer surface of the inner ring ( 20 ) and gradually press-fitting the inner ring ( 20 ) to the hub ( 10 ) (S 120 );
measuring a positional variation of the outer ring ( 30 ) and a positional variation of the press-fit jig ( 50 ) by an external measuring instrument (S 130 );
measuring a displacement (G 1 ) of an end surface ( 50 ) of the inner ring when a movement (E) of the outer ring ( 30 ) appears after the inner ring ( 20 ) is brought into contact with the row of balls ( 40 ) (S 140 ); and
measuring a displacement (G 2 ) of the end surface ( 50 ) of the inner ring after completely press-fitting the inner ring ( 20 ) to the hub ( 10 ) (S 150 ).