Revolution detecting device for hydraulic motor

Abstract

Abstract PURPOSE:To utilize a spline as a revolution detecting part by arranging an electromagnetic pickup at a position facing a spline of a cylinder block which forms a mechanical brake. CONSTITUTION:A cylinder block 3a is accommodated in a freely rotatable manner within a motor casing 1a which forms an outer shell, while a mechanical brake, which restricts the revolution of a motor output shaft 2a, is also accommodated in the casing 1a. This mechanical brake is provided with a friction plate 27 and a piston 28, which can abut on this friction plate 27. A revolution detecting device is equipped with a spline 24, which is formed on the outer periphery of the cylinder block 3a, and an electromagnetic pickup 22. This pick up 22 is accomodated in a through hole 21 that is formed at a position of the motor casing 1a, which faces the spline 24 of the cylinder block 3a.

Inventors

• 👤 Hideaki Tanaka
• 👤 Toichi Hirata
• 👤 Masakazu Haga

Bibliographic Details