JPS6436747U - - Google Patents
Info
- Publication number
- JPS6436747U JPS6436747U JP13095387U JP13095387U JPS6436747U JP S6436747 U JPS6436747 U JP S6436747U JP 13095387 U JP13095387 U JP 13095387U JP 13095387 U JP13095387 U JP 13095387U JP S6436747 U JPS6436747 U JP S6436747U
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- oil passage
- valve
- accumulation chamber
- hydraulic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000009825 accumulation Methods 0.000 claims description 6
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Forklifts And Lifting Vehicles (AREA)
- Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)
- Gear-Shifting Mechanisms (AREA)
Description
第１図は本考案実施例を採用したクラツチ油圧
制御装置の回路図、第２図は本考案実施例による
油圧制御特性を示すグラフである。
１…インチングバルブ、２…入口油路、３…出
口油路、５…チヤージポンプ（油圧供給源）、７
…切換弁、１０…アキユムレータ、１１…蓄圧室
、１２…ピストン、１３…スプリング、１４…減
圧油路、１５…減圧バルブ部、１６…制御バルブ
部、２０…操作部、Ａ…第１の操作範囲、Ｂ…第
２操作範囲、Ｄ…ドレン油路。
FIG. 1 is a circuit diagram of a clutch hydraulic control system employing an embodiment of the present invention, and FIG. 2 is a graph showing hydraulic control characteristics according to an embodiment of the present invention. 1... Inching valve, 2... Inlet oil path, 3... Outlet oil path, 5... Charge pump (hydraulic supply source), 7
...Switching valve, 10...Accumulator, 11...Pressure accumulation chamber, 12...Piston, 13...Spring, 14...Reducing oil passage, 15...Pressure reducing valve section, 16...Control valve section, 20...Operation section, A...First operation Range, B...Second operation range, D...Drain oil path.
Claims (1)
の途中にインチングバルブを配置し、インチング
バルブに減圧バルブ部及び制御バルブ部を設け、
上記両バルブ部を操作部に連結し、インチブバル
ブにアキユムレータを併設し、アキユムレータに
、上記油圧供給油路に接続する蓄圧室と、該蓄圧
室に対向するピストンと、ピストンを蓄圧室側へ
付勢するスプリングとを設け、上記蓄圧室と減圧
バルブ部を減圧油路で接続し、減圧油路の一端を
、ピストン移動範囲の中間位置に対応する位置に
おいて蓄圧室の内壁面に開口させ、減圧バルブ部
に、減圧油路の他端をドレン油路に接続できる油
路を設け、制御バルブ部に上記油圧供給油路の油
圧を制御するための開度可変型の油路を設け、操
作部の第１の操作範囲において、上記減圧バルブ
部の油路が閉鎖するとともに、制御バルブ部が油
圧供給油路の油圧を減圧せず、上記第１操作範囲
に続く第２操作範囲において、減圧バルブ部の油
路が開放するとともに、制御バルブ部が、油圧供
給油路の油圧を操作部の位置に対応する値に設定
するようにしたことを特徴とするインチングバル
ブ機構。 An inching valve is arranged in the middle of a hydraulic supply oil path extending from a hydraulic pressure supply source to a switching valve, and a pressure reducing valve part and a control valve part are provided in the inching valve,
Both of the above valve parts are connected to the operation part, an accumulator is attached to the inching valve, and the accumulator has a pressure accumulation chamber connected to the above-mentioned hydraulic pressure supply oil passage, a piston facing the pressure accumulation chamber, and the piston is moved toward the pressure accumulation chamber side. a biasing spring is provided, the pressure accumulation chamber and the pressure reducing valve portion are connected by a pressure reduction oil passage, and one end of the pressure reduction oil passage is opened to the inner wall surface of the pressure accumulation chamber at a position corresponding to an intermediate position of the piston movement range; The pressure reducing valve part is provided with an oil passage that can connect the other end of the pressure reducing oil passage to the drain oil passage, and the control valve part is provided with a variable opening oil passage for controlling the oil pressure of the oil pressure supply oil passage. In the first operation range of the section, the oil passage of the pressure reducing valve section is closed, and the control valve section does not reduce the pressure of the hydraulic pressure supply oil passage, and in the second operation range following the first operation range, the pressure is reduced. 1. An inching valve mechanism characterized in that when an oil passage in a valve part opens, a control valve part sets a hydraulic pressure in a hydraulic pressure supply oil passage to a value corresponding to a position of an operating part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13095387U JPS6436747U (en) | 1987-08-28 | 1987-08-28 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13095387U JPS6436747U (en) | 1987-08-28 | 1987-08-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6436747U true JPS6436747U (en) | 1989-03-06 |
Family
ID=31386576
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13095387U Pending JPS6436747U (en) | 1987-08-28 | 1987-08-28 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6436747U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010090151A1 (en) * | 2009-02-09 | 2010-08-12 | 北光金属工業株式会社 | High-manganese spheroidal graphite cast iron |
-
1987
- 1987-08-28 JP JP13095387U patent/JPS6436747U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010090151A1 (en) * | 2009-02-09 | 2010-08-12 | 北光金属工業株式会社 | High-manganese spheroidal graphite cast iron |
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