JPS62138765U - - Google Patents
Info
- Publication number
- JPS62138765U JPS62138765U JP2196886U JP2196886U JPS62138765U JP S62138765 U JPS62138765 U JP S62138765U JP 2196886 U JP2196886 U JP 2196886U JP 2196886 U JP2196886 U JP 2196886U JP S62138765 U JPS62138765 U JP S62138765U
- Authority
- JP
- Japan
- Prior art keywords
- control valve
- parking brake
- hydraulic motor
- valve
- 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
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Operation Control Of Excavators (AREA)
- Fluid-Pressure Circuits (AREA)
Description
第１図は本考案の実施例の説明図、第２図は従
来のホイール式油圧シヨベルを例にした走行油圧
回路の説明図である。
１……エンジン、２……油圧ポンプ、３……方
向制御弁、７……油圧モータ、１１……空気圧縮
機、１３……駐車ブレーキ弁、１４……駐車ブレ
ーキ装置、１６……切換弁。
FIG. 1 is an explanatory diagram of an embodiment of the present invention, and FIG. 2 is an explanatory diagram of a travel hydraulic circuit using a conventional wheel-type hydraulic excavator as an example. DESCRIPTION OF SYMBOLS 1...Engine, 2...Hydraulic pump, 3...Direction control valve, 7...Hydraulic motor, 11...Air compressor, 13...Parking brake valve, 14...Parking brake device, 16...Switching valve .
Claims (1)
気圧縮機と、油圧ポンプより吐出される圧油の流
れを制御し車両の前後進の方向を決める方向制御
弁と、方向制御弁を介した圧油により駆動される
油圧モータと、前記空気圧縮機から供給される圧
気により駐車ブレーキ弁のＯＮ／ＯＦＦ操作を介
して解除／制動されるネガテイブ形の駐車ブレー
キ装置とを備えた油圧駆動車両の走行油圧回路に
おいて、前記方向制御弁と油圧モータとを接続し
ている管路内に、駐車ブレーキ装置が解除されて
いるときは方向制御弁と油圧モータとが連通され
、反対に駐車ブレーキ装置が制動されているとき
は方向制御弁の出力ポートが短絡され油圧モータ
への圧油の供給が遮断されるとともに、油圧モー
タの入力および出力ポートがブロツクされる構成
の切換弁が、駐車ブレーキ弁の操作に連動して作
動するように設けられていることを特徴とする油
圧駆動車両の走行油圧回路。 A hydraulic pump and an air compressor are driven by the engine, a direction control valve that controls the flow of pressure oil discharged from the hydraulic pump and determines the forward and backward direction of the vehicle, and a direction control valve that is driven by the pressure oil via the direction control valve. A traveling hydraulic circuit for a hydraulically driven vehicle comprising: a hydraulic motor; and a negative parking brake device that is released/braked by turning on/off a parking brake valve using air pressure supplied from the air compressor; In a conduit connecting the directional control valve and the hydraulic motor, the directional control valve and the hydraulic motor are in communication when the parking brake device is released, and conversely when the parking brake device is braked. In this case, the output port of the directional control valve is short-circuited to cut off the supply of pressure oil to the hydraulic motor, and the switching valve is configured to block the input and output ports of the hydraulic motor in conjunction with the operation of the parking brake valve. A travel hydraulic circuit for a hydraulically driven vehicle, characterized in that it is configured to operate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2196886U JPS62138765U (en) | 1986-02-20 | 1986-02-20 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2196886U JPS62138765U (en) | 1986-02-20 | 1986-02-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62138765U true JPS62138765U (en) | 1987-09-01 |
Family
ID=30818900
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2196886U Pending JPS62138765U (en) | 1986-02-20 | 1986-02-20 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62138765U (en) |
-
1986
- 1986-02-20 JP JP2196886U patent/JPS62138765U/ja active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH03115161U (en) | ||
| JPS62138765U (en) | ||
| CN108394395B (en) | Brake valve block assembly for tractor | |
| JPH0312659U (en) | ||
| JPS60126553U (en) | Hydraulic circuits for civil engineering and construction machinery | |
| JPH0313362U (en) | ||
| JPS612568U (en) | Hydraulic pump merging device for earthmoving vehicles | |
| JPS62122905U (en) | ||
| JPS6312208Y2 (en) | ||
| JPS63165232U (en) | ||
| JPS6294158U (en) | ||
| JPS58165011U (en) | Automatic work speed control device for road cutters | |
| JPH0190866U (en) | ||
| JPS58144104U (en) | Braking device for hydraulically driven machines | |
| JPS60135268U (en) | work vehicle | |
| JPH03117157U (en) | ||
| JPH027127U (en) | ||
| JPS595670U (en) | Hydraulic circuit of hydraulically driven work vehicle | |
| JPH01138959U (en) | ||
| JPS6271187U (en) | ||
| JPH01125264U (en) | ||
| JPH0317468U (en) | ||
| JPH02126933U (en) | ||
| JPS61108293U (en) | ||
| JPS62130144U (en) |