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GETRIEBEMESSVERFAHREN UND GETRIEBEMESSVORRICHTUNG

Patentnummer:EP3228973B1
IPC Hauptklasse:G01B5/16
Anmelder:JTEKT CORP (1)
Erfinder:FUJITA TETSUYA (1)
KITABAYASHI KEIYA (1)
KOHATA RINTARO (1)
MORODOME TOSHIYA (1)
NAKAMORI MISATO (1)
Anmeldung:31.03.17
Patenterteilung:25.08.21
Einspruch bis:25.05.22

Abstract / Hauptanspruch
A gear measurement method and a gear measurement apparatus capable of evaluating meshing and fitting of a gear are provided. A measurement method for a gear (9) includes a measurement step of measuring an actual movement locus of a ball (25) that is moved along a tooth groove (91) of the gear (9) as a shape evaluation index for the gear (9). In the case of a VGR rack, tooth surfaces (92) of rack teeth (9) are constituted of curved surfaces. Thus, a reference pin for use in OPD cannot be disposed so as to be in line contact with the tooth surfaces (92), and the rack teeth (9) cannot be measured. However, the ball (25) can be disposed so as to be in point contact with the tooth surfaces (92), which enables a measurement of the rack teeth (9).


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