JPS63180329U - - Google Patents
Info
- Publication number
- JPS63180329U JPS63180329U JP1987070346U JP7034687U JPS63180329U JP S63180329 U JPS63180329 U JP S63180329U JP 1987070346 U JP1987070346 U JP 1987070346U JP 7034687 U JP7034687 U JP 7034687U JP S63180329 U JPS63180329 U JP S63180329U
- Authority
- JP
- Japan
- Prior art keywords
- fluid pressure
- supply path
- brake
- operating
- pressure supply
- 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.)
- Granted
Links
- 239000012530 fluid Substances 0.000 claims description 11
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Motor Power Transmission Devices (AREA)
- Control Of Fluid Gearings (AREA)
Description
図面は本考案に係る作業車の中心ブレーキ操作
部の実施例を示し、第１図は油圧回路図、第２図
はホイールローダの側面図である。
１７……ネガテイブブレーキ、１９Ａ……流体
圧アクチユエータ、２０……流体圧供給路、２１
Ａ，２２……操作バルブ、２３……戻り路、Ｖ…
…操作バルブ。
The drawings show an embodiment of the central brake operating section of a working vehicle according to the present invention, with FIG. 1 being a hydraulic circuit diagram and FIG. 2 being a side view of a wheel loader. 17...Negative brake, 19A...Fluid pressure actuator, 20...Fluid pressure supply path, 21
A, 22...operation valve, 23...return path, V...
...operated valve.
Claims (1)
クチユエータ１９Ａへの流体圧供給路２０に、前
記流体圧アクチユエータ１９Ａに対する操作バル
ブ２１Ａを介装し、かつ、前記流体圧供給路２０
に流体圧作動式の駐車用のネガテイブブレーキ１
７を接続し、このネガテイブブレーキ１７に前記
流体圧供給路２０の流体圧を供給するブレーキ解
除位置とネガテイブブレーキ１７内の流体圧を戻
り路２３に逃がすブレーキ位置とに切替操作自在
なブレーキ用の操作バルブ２２を設けてある作業
車の走行操作装置であつて、前記２つの操作バル
ブ２１Ａ，２２を形成するに、前記流体圧アクチ
ユエータ１９Ａを高速側および低速側に作動させ
る２つの操作位置と前記流体圧供給路２０を前記
戻り路２３に接続させる操作位置とを備えた三位
置切換式の１つの操作バルブを設けてある作業
車の走行操作装置。 An operating valve 21A for the fluid pressure actuator 19A is interposed in the fluid pressure supply path 20 to the fluid pressure actuator 19A for changing the traveling speed into two high and low stages, and the fluid pressure supply path 20
Hydraulic pressure operated negative brake for parking 1
7 and which can be freely switched between a brake release position in which the fluid pressure of the fluid pressure supply path 20 is supplied to the negative brake 17 and a brake position in which the fluid pressure in the negative brake 17 is released to the return path 23. The travel control device for a work vehicle is provided with an operation valve 22, and the two operation valves 21A and 22 are formed by two operation positions for operating the fluid pressure actuator 19A to a high speed side and a low speed side; A traveling control device for a work vehicle, which is provided with one operating valve of a three-position switching type, which is provided with an operating position that connects the fluid pressure supply path 20 to the return path 23.
Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987070346U JPH0646744Y2 (en) | 1987-05-11 | 1987-05-11 | Work vehicle travel control device |
| GB8728842A GB2204652B (en) | 1987-05-09 | 1987-12-10 | Fluid pressure control circuit for working vehicle having transmission operable by fluid pressure |
| CA000554717A CA1323825C (en) | 1987-05-09 | 1987-12-17 | Fluid pressure control circuit for working vehicle having transmission operable by fluid pressure |
| KR1019870015144A KR910001545B1 (en) | 1987-05-09 | 1987-12-26 | Fluid pressure control circuit for working vehicle having transmission operable by fluid pressure |
| DE3800542A DE3800542C2 (en) | 1987-05-09 | 1988-01-12 | Pressure medium control circuit for a work vehicle with a hydrostatic transmission unit |
| US07/142,960 US4858435A (en) | 1987-05-09 | 1988-01-12 | Fluid pressure control circuit for working vehicle having transmission operable by fluid pressure |
| FR8800353A FR2614850B1 (en) | 1987-05-09 | 1988-01-14 | PRESSURE FLUID CONTROL CIRCUIT FOR A CONSTRUCTION SITE PROVIDED WITH A TRANSMISSION MANEUVERABLE BY A PRESSURE FLUID |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987070346U JPH0646744Y2 (en) | 1987-05-11 | 1987-05-11 | Work vehicle travel control device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63180329U true JPS63180329U (en) | 1988-11-22 |
| JPH0646744Y2 JPH0646744Y2 (en) | 1994-11-30 |
Family
ID=30911902
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987070346U Expired - Lifetime JPH0646744Y2 (en) | 1987-05-09 | 1987-05-11 | Work vehicle travel control device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0646744Y2 (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50153621U (en) * | 1974-06-06 | 1975-12-20 | ||
| JPS514424U (en) * | 1974-02-22 | 1976-01-13 | ||
| JPS5350986U (en) * | 1976-10-02 | 1978-04-28 |
-
1987
- 1987-05-11 JP JP1987070346U patent/JPH0646744Y2/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS514424U (en) * | 1974-02-22 | 1976-01-13 | ||
| JPS50153621U (en) * | 1974-06-06 | 1975-12-20 | ||
| JPS5350986U (en) * | 1976-10-02 | 1978-04-28 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0646744Y2 (en) | 1994-11-30 |
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