| 摘要 |
PURPOSE:To obtain a height measuring apparatus in which a gear contact body follows the inclination of a large differential gear, in which the engagement position of the gear is corrected and in which the height of the differential gear is measured precisely by a method wherein a criterion-face contact body which can be lifted is brought into contact with a criterion face and with the large differential gear and the contact body is turned around the shaft center of the large differential gear. CONSTITUTION:A base stand 12 is lowered along a rail 11, a flange-face contact body 12 is brought into contact with the contact face 1b of a case-side flange 1a, and the gear contact part 16B of a gear contact body 16 is brought into contact with the plane part of a large differential gear 8. At this time, the contact body 13 is energized by a compression coil spring 22 and the gear contact body 16 is energized by a compression coil spring 19 to follow the inclination of a case 1. Then, a push-pull rod 38 is raised, a large differential gear 4 is clamped by a collet 42, a motor 32 is driven, and, while the large gear 8 is being turned via a the large gear 4 and a small gear 5, its height is measured. That is to say, the movement amount of a measuring probe 17a due to the movement of the gear contact body 16 is measured by a measuring instrument 17 as the height H of the large differential gear 8 with reference to the case 1.
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