hydraulic motor

Abstract

PROBLEM TO BE SOLVED: To lubricate a counterpart member using a drain oil when a hydraulic motor is attached to the counterpart member and to hold the drain oil in a motor housing when the hydraulic motor is detached from the counterpart member.SOLUTION: An oil path 38 is provided to the hydraulic motor housing 32 of a hydraulic motor 31 and an oil path opening and closing means 39 opening and closing the oil path 38 is provided. Thereby, when the hydraulic motor housing 32 is attached to the upper side of an electric motor housing 24, the oil path 38 is automatically opened by the oil path opening and closing means 39, and the drain oil in the inner part of the hydraulic motor housing 32 is made to flow down through the oil path 38 and can be supplied to the connection part of an electric motor shaft 27 and a hydraulic motor shaft 34. On the other hand, when the hydraulic motor housing 32 is removed from the electric motor housing 24, the oil path 38 is automatically closed by the oil path opening and closing means 39 and the drain oil can be held in the hydraulic motor housing 32.

Description

technical field [0001] The present invention relates to a hydraulic motor suitable for use in a rotary device or the like of a construction machine such as a hydraulic excavator or a hydraulic crane. Background technique [0002] Generally, a hydraulic excavator as a representative example of a construction machine roughly includes: a self-propelled lower traveling body; an upper rotating body rotatably mounted on the lower traveling body by means of rotating wheels; The working device on the side. In addition, the construction machine has a structure in which a rotating device is provided between the undercarriage and the upper revolving body, and the upper revolving body rotates on the lower traveling body by operating the rotating device. [0003] Here, the rotation device generally includes: a speed reducer mounted on the upper rotating body to decelerate the input rotation and output it; a rotation motor provided on the upper side of the speed reducer to input the rota...

AI Technical Summary

Problems solved by technology

Therefore, there is a problem that, for example, when the hydraulic motor is removed from the speed reducer for maintenance of the hydraulic motor and the hydraulic motor is transported to a maintenance factory, etc., the drain oil in the hydraulic motor case passes through the gap formed between the inner ring and the outer ring of the bearing. The gap between the leakage to the outside

As a result, the periphery of the hydraulic motor is contaminated by the drain oil leaking from the hydraulic motor case, and the workability of maintenance on the hydraulic motor is reduced.

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