Fluid pressure rotating device and construction machine

A rotating device and fluid pressure technology, which is applied in the direction of liquid variable capacity machinery, construction, mechanical equipment, etc., can solve the problems of increased friction, reduced volumetric efficiency of fluid motors, and reduced mechanical efficiency of fluid motors, etc., to achieve the best preventive performance Reduced effect

Pending Publication Date: 2020-08-21
NABLESCO CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in the case of using such a fluid motor, the cylinder body may be toppled due to bending of the rotating shaft of the cylinder body, and the performance of the fluid motor may decrease.
That is, sometimes fluid leaks from the gap between the cylinder block and the valve plate to reduce the volumetric efficiency of the fluid motor, or sometimes the fluid film between the cylinder block and the valve plate is interrupted so that the fluid acting between the cylinder block and the valve plate Increased friction reduces the mechanical efficiency of fluid motors

Method used

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  • Fluid pressure rotating device and construction machine
  • Fluid pressure rotating device and construction machine
  • Fluid pressure rotating device and construction machine

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Embodiment Construction

[0027] Hereinafter, one embodiment of the present invention will be described with reference to the drawings. In addition, for the sake of easy understanding, the elements shown in each drawing may include elements shown differently from actual ones such as dimensions and scales.

[0028] The fluid pressure rotation device 10 described below functions as an axial piston type device. In the illustrated example, the fluid pressure rotation device 10 is configured as a fluid motor, and outputs rotation by supplying fluid. More specifically, the illustrated fluid motor 10 is configured as a swash plate type fluid motor.

[0029] In addition, below, the case where the fluid motor 10 is used as the motor for the turning device 10a of the hydraulic excavator 1 or the traveling devices 10b and 10c will be described.

[0030] First, the hydraulic excavator 1 will be described. figure 1 It is an external view showing a schematic configuration example of the hydraulic excavator 1 . I...

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PUM

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Abstract

The invention provides a fluid pressure rotating device and a construction machine. A fluid pressure rotating device (10) is provided with: a housing (20); a cylinder (40) rotatably housed in the housing (20); a piston (50) which is movably supported in a cylinder chamber (41) that is open on one side of the cylinder (40); and a valve plate (60) disposed between the housing (20) and the cylinder (40), wherein a fluid chamber (65) is provided between the valve plate (60) and the housing (20), the valve plate (60) is provided with a flow path (66) communicating with the fluid chamber (65), the flow path (66) opens at a position facing the passage (42) that opens at the other side of the cylinder (40) and communicates with the cylinder chamber (41).

Description

technical field [0001] The present invention relates to a fluid pressure rotating device and a construction machine equipped with the fluid pressure rotating device. Background technique [0002] As disclosed in, for example, JPH9-287552A, fluid pressure rotation devices such as fluid motors that output rotation by supplying fluid are known. The fluid motor disclosed in JPH9-287552A is configured as an axial piston type device. An axial piston type fluid motor has: a housing; a cylinder rotatably accommodated in the housing; a piston slidably inserted into a cylinder chamber formed in the cylinder; and a valve plate (synchronizing plate) , which is mounted on the casing in a state of being sandwiched between the casing and the cylinder. The valve plate has a pair of fluid ports. One fluid port is connected to a fluid pressure source and the other fluid port is connected to a tank. A connection port that opens toward the valve plate and is connected to the cylinder chambe...

Claims

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Application Information

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IPC IPC(8): F04B1/22F04B1/2042F04B1/205F04B1/2064
CPCF04B1/22F04B1/2042F04B1/205F04B1/2064F03C1/0636E02F9/2203
Inventor 狩野拓广小岛健太郎
Owner NABLESCO CORP
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