Fixed vane type hydraulic motor

Abstract

Disclosed is a fixed vane type hydraulic motor in which a steady output can be obtained and rotation speed of an output shaft can be varied. The hydraulic motor includes a main body having an actuating space provided therein, a fluid passing device to make the fluid flow toward the main body and a horizontal rotation body, a fluid compulsorily circulating device to compulsorily circulate the fluid through the respective fluid chambers, and an oblique rotation body having a rotation plate which is rotatably mounted to the opened opposite side of the main body and to the horizontal rotation body by a fixing device.

Description

BACKGROUND ART[0001]1. Technical Field[0002]The present invention relates to a fixed vane type hydraulic motor in which an output is obtained by compulsorily circulating a fluid, and more particularly, to a fixed vane type hydraulic motor in which a steady output can be obtained and rotation speed of an output shaft can be varied.[0003]2. Description of the Related Art[0004]Generally, a hydraulic motor is a device in which a high pressure that is generated by a hydraulic pump driven by a motor or an engine is applied to a driving shaft to generate a driving force.[0005]In other words, there are commonly used hydraulic motors such as a slice vane type hydraulic motor and an axel piston type hydraulic motor. The slice vane type hydraulic motor has advantages such as a simple structure, light weight, and a small variation of torque. However, in the slice vane type hydraulic motor, since much fluid leaks from the inside thereof due to the movement of a slice vane, a great centrifugal fo...

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Benefits of technology

[0007]Therefore, the present invention has been made in view of the above problems, and it is an aspect of the present invention to provide a high efficiency fixed vane type hydraulic motor in which a load is not increased due to a centrifugal force even when the fixed vane type hydraulic motor is driven at a high speed such that the fixed vane type hydraulic motor can be smoothly driven from a stopped state to the high speed, wear of a driving unit is minimized to elongate a lifespan, heat, noise, and vibration are minimized, and the lifespan can be maximized without limit of manufacturing material.

[0009]It is still another aspect of the present invention to provide a fixed vane type hydraulic motor in which an angle of an oblique rotation body is changed to easily vary a rotation speed of an output shaft while the fixed vane type hydraulic motor is driven to obtain an output, the rotation direction of the output shaft is easily changed, and the output shaft while rotating, is rapidly stopped.

Problems solved by technology

However, in the slice vane type hydraulic motor, since much fluid leaks from the inside thereof due to the movement of a slice vane, a great centrifugal force is generated due to a high rotation speed, the slice vane is closely contacted to an inner wall of a cam ring due to the centrifugal force to increase a frictional force, the frictional force consumes the driving force and causes heat, noise, and vibration, the slice vane is worn rapidly and torque efficiency is inferior in the event of starting and driving at a low speed.

Moreover, in the axel piston type hydraulic motor, although a small quantity of a fluid leaks from the inside thereof, a torque stability is excellent at a low speed, and a range of a rotation speed is wide, its structure is complex and a flow of the fluid is obstructed in the event of driving the axel piston type hydraulic motor at a high speed so that noise and vibration are generated, malfunction occurs, efficiency becomes inferior, and it is expensive.

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