JPS61118973U

JPS61118973U -

Info

Publication number: JPS61118973U
Application number: JP257185U
Authority: JP
Priority date: 1985-01-10
Filing date: 1985-01-10
Publication date: 1986-07-26
Also published as: JPH0313587Y2

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例を示すポンプ／モー
タの断面図、第２図は第１図における―線断
面図である。第３図は第１図における―線断
面図である。第４図は従来の接続ポート切換機構
を示す機構一部の分解斜視図である。１……ハウジング（ケーシング）、２……流出
入（低圧）ポート、３……流出入（高圧）ポート
、５……回転軸、６……トルクプレート、７……
シリンダボア、８……ピストン内室、９……シリ
ンダブロツク、１０……ピストン、１１……（低
圧）接続ポート、１２……（高圧）接続ポート、
１３……バルブ面、２４，２５……作動液流通路
、２６……ポートブロツク、２９，３０……ラン
ド、３６……回転駆動機構、３８……ピニオン歯
、３９……ラツク歯、４０……ラツクスプール、
４１……液圧シリンダ、４２……液圧導入路、４
５……バネ。 FIG. 1 is a sectional view of a pump/motor showing an embodiment of the present invention, and FIG. 2 is a sectional view taken along the line -- in FIG. FIG. 3 is a sectional view taken along the line -- in FIG. 1. FIG. 4 is an exploded perspective view of a part of a conventional connection port switching mechanism. 1... Housing (casing), 2... Outflow/inflow (low pressure) port, 3... Outflow/inflow (high pressure) port, 5... Rotating shaft, 6... Torque plate, 7...
Cylinder bore, 8... Piston inner chamber, 9... Cylinder block, 10... Piston, 11... (Low pressure) connection port, 12... (High pressure) connection port,
13... Valve surface, 24, 25... Working fluid flow path, 26... Port block, 29, 30... Land, 36... Rotation drive mechanism, 38... Pinion tooth, 39... Rack tooth, 40... …Lux spool,
41...Hydraulic pressure cylinder, 42...Hydraulic pressure introduction path, 4
5...Spring.

Claims

[Scope of utility model registration request]

A cylinder block that has a plurality of axial cylinder bores arranged at equal angular intervals in the circumferential direction, which form a piston inner chamber that is sealed by a piston that is slidably fitted into a piston, is rotatable in a housing that has an inflow and outflow port. The piston is configured to reciprocate as the cylinder block rotates to increase or decrease the volume of the piston inner chamber, and the inflow and outflow ports are arranged on a valve surface facing one end of the cylinder block in the housing. A pair of connecting ports are provided, each of which communicates with the port and opens in a substantially semicircular shape with a narrow land in between, and the volume of the piston inner chamber arranged in the circumferential direction of the cylinder block is increasing. A connection port of a piston-type hydraulic engine, wherein the inner chamber of the piston is communicated with one of the connection ports, and when the inner chamber of the piston is decreasing in volume, the inner chamber of the piston is communicated with the other of the connection ports. In the switching mechanism, the connection port is provided in a port block separate from the housing, and the port block is rotatably attached to the inner surface of the housing,
A piston-type hydraulic engine characterized in that the port block is provided with a rotational drive mechanism that rotationally displaces the port block in a predetermined direction in proportion to the pressure of high-pressure hydraulic fluid flowing in and out of the hydraulic engine. Connection port switching mechanism.