Patent GB-707657-A (GB)
Title: Improvement in gauging device for bearings
IPC: G01B13/12
Filed: 1951-07-11
Abstract: 707,657. Linear-dimension gauges. SHEFFIELD CORPORATION. July 11, 1951 [July 22, 1950], No. 16421/51. Class 106 (2) The invention relates to apparatus for and a method of gauging the average transverse distance between the raceways of inner and outer taper roller bearing races to determine the size of rollers for co-operation therewith and to gauge any taper error. An outer race 13, Fig. 5, is placed on a locating ring 12 on a table 11, Fig. 2, supported by a base 10 and is located approximately concentrically with the ring 12 by a V-block 14. An upper carrier 18 with spaced arms 20, 21, 22 is pivoted about a shaft 17 mounted in brackets 16 on the table 11 and each arm terminates in a gauging head 23 curved to interfit between inner and outer raceways with a small radial clearance. The two arms 20, 22 are fixed while the arm 21 has radial play between guides 24 limited by a pin 25 projecting downwardly through a hole 26 in the carrier 18. In order to load the parts for gauging the carrier 18 is raised and the inner race 15 is applied to the gauging heads 23 upon which its end flange 41 rests while it projects downwards through a hole 27 in the carrier. With the two races 13, 15 in position the carrier 18 is lowered by actuating a foot pedal 29 to admit fluid pressure to a cylinder 30 on the support 10 causing a piston rod 31 to move to the right to operate a control arm 32 fixed to a depressing arm 33 pivoted on the shaft 17. The carrier 18 is supported in raised position by a lug 34 fixed on the arm 33 which during lowering brings the inner race down in concentric relation with the outer race and then continues to descend until stopped by a transverse bar 36 engaging stop posts 35 whose height is determined to ensure that the bar 36 presses the inner race down to a position where the relative spacing of the races simulates operating conditions. Downward movement of the upper carrier 18 takes place against a pair of spring pressed studs 38 normally held up by springs 39 with a cross pin 40 in each stud bearing against the lower side of the table 11. After gauging the foot pedal 29 is actuated to cause pressure fluid to enter the other end of cylinder 30 and move the piston rod and arm 32 to the left thus raising the arm 33 and carrier 18. The average transverse spacing between the inner and outer raceways is gauged by measuring the air leakage taking place between the surfaces of the inner and outer raceways and pairs of opposed nozzles 42, 43 in each gauging head 23. The nozzles are recessed preferably a few tenthousandths of an inch below the adjacent surfaces of the gauging head and they communicate with each other through a passage 44 connected to a passage 45 leading to tubes one for each head which are severally connected to a common air supply tube 47 supplied with air under pressure from a measuring device 48 supplied at constant pressure through a tube 49. The nozzles 42, 43 may be placed mid-way between the ends of the races or preferably a second pair of nozzles 60, 61 may be added to each head, the two pairs being spaced axially so as to allow the taper to be checked, air being supplied through a second measuring device 65 any difference in reading between the devices 48, 65 indicating an error in taper. Reference has been directed by the Comptroller to Specification 681,741.