Hydraulic controller and hydraulic drive unit provided with said hydraulic controller
AssigneeKayaba Industry Co., Ltd.
InventorsYoshitake Sakai, Osamu Sato
Life of this patent
Estimating the term…
Abstract
A hydraulic controller in which driving sound and the number of parts can be reduced, and a long service life can be realized, and a hydraulic drive unit provided with said hydraulic controller. The hydraulic controller for a hydraulic drive unit includes a housing that includes an electric motor housing configured to house an electric motor, an oil pump housing configured to house a hydraulic pump, and a valve housing configured to house valves are integrated together.
Claims15
A hydraulic controller for a hydraulic drive unit, comprising:
- a housing that includes an electric motor housing configured to house an electric motor, a hydraulic pump housing configured to house a hydraulic pump, and a valve housing configured to house valves;
- the hydraulic pump;
- an operate check valve operable to control the flow of hydraulic oil in normal and reverse directions between the hydraulic pump and a hydraulic drive unit actuator;
- and
- a switching valve operable to control the flow of hydraulic oil in normal and reverse directions between the hydraulic pump and an oil tank;
- wherein an oil tank cover attachment portion that is configured for detachably installing an oil tank cover body is formed at a location on the housing that is opposite an electric motor arrangement surface portion that is configured to receive the electric motor;
- and
- wherein in the housing, the operate check valve, the hydraulic pump, and the switching valve are provided in that order from the side of the electric motor arrangement surface portion to the side of the oil tank cover body attachment portion.
A hydraulic controller for a hydraulic drive unit, comprising:
- a housing that includes an electric motor housing configured to house an electric motor, a hydraulic pump housing configured to house a hydraulic pump, and a valve housing configured to house valves;
- the hydraulic pump;
- an operate check valve operable to control the flow of hydraulic oil in normal and reverse directions between the hydraulic pump and a hydraulic drive unit actuator;
- and
- a switching valve operable to control the flow of hydraulic oil in normal and reverse directions between the hydraulic pump and an oil tank;
- wherein an oil tank cover attachment portion that is configured for detachably installing an oil tank cover body is formed at a location on the housing that is opposite an electric motor arrangement surface portion that is configured to receive the electric motor;
- and
- wherein in the housing, the hydraulic pump, the operate check valve, and the switching valve are provided in that order from the side of the electric motor arrangement surface portion to the side of the oil tank cover body attachment portion.
A hydraulic controller for a hydraulic drive unit, comprising:
- a housing that includes an electric motor housing configured to house an electric motor, a hydraulic pump housing configured to house a hydraulic pump, and a valve housing configured to house valves;
- the electric motor;
- and
- the hydraulic pump;
- wherein an output shaft of the electric motor extends at least partway through the housing and is directly connected to a drive gear of the hydraulic pump;
- wherein the output shaft of the electric motor is supported by at least one bearing at a single bearing support location along the length of the shaft, and
- wherein said bearing support location is between the electric motor and the pump.
Dependencies are inferred from the claim text.