JPH0216851U

JPH0216851U -

Info

Publication number: JPH0216851U
Application number: JP9555988U
Authority: JP
Priority date: 1988-07-19
Filing date: 1988-07-19
Publication date: 1990-02-02

Description

[Brief explanation of drawings]

第１図は本考案にかかる液圧装置の配管図、第
２図はバイパスバルブの断面図、第３図は従来例
を示す配管図である。１……液圧ポンプ、２……モータ、３……チヤ
ージポンプ、４……操作プランジヤ、５……コン
トロールバルブ、６……インチングバルブ、７…
…バイパスバルブ、７４……パイロツト室、Ｌ１
……第１ライン、Ｌ２……第２ライン、Ｌ３……
吐出ライン、Ｌ６……バイパス路、Ｌ７……パイ
ロツトライン。 FIG. 1 is a piping diagram of a hydraulic device according to the present invention, FIG. 2 is a sectional view of a bypass valve, and FIG. 3 is a piping diagram showing a conventional example. DESCRIPTION OF SYMBOLS 1...Hydraulic pump, 2...Motor, 3...Charge pump, 4...Operation plunger, 5...Control valve, 6...Inching valve, 7...
...Bypass valve, 74...Pilot chamber, L1
...First line, L2...Second line, L3...
Discharge line, L6... bypass path, L7... pilot line.

Claims

[Scope of utility model registration request]

In a hydraulic device including a variable displacement hydraulic pump 1 and a motor 2, a first line L1 and a second line L2 connecting these pumps 1 and motor 2, and a charge pump 3, the discharge line L3 of the charge pump 3 is connected to the A control valve 5 of the operating plunger 4 for adjusting the position of the variable control element in the hydraulic pump 1 and an inching valve 6 are interposed, and the first and second lines L1, L are provided.
A bypass passage L6 is provided between the two, and a bypass valve 7 is interposed in the bypass passage L6, and the pilot chamber 74 of the bypass valve 7 is connected to the inching valve 6 in the discharge line L3 through the pilot line L7. A hydraulic device characterized by being connected to a secondary side.