JPH031873U - - Google Patents
Info
- Publication number
- JPH031873U JPH031873U JP6097889U JP6097889U JPH031873U JP H031873 U JPH031873 U JP H031873U JP 6097889 U JP6097889 U JP 6097889U JP 6097889 U JP6097889 U JP 6097889U JP H031873 U JPH031873 U JP H031873U
- Authority
- JP
- Japan
- Prior art keywords
- valve
- pressure
- priority
- switching
- steering
- 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
- 238000009825 accumulation Methods 0.000 claims description 2
- 238000001514 detection method Methods 0.000 claims 2
- 230000001105 regulatory effect Effects 0.000 claims 2
- 208000033748 Device issues Diseases 0.000 claims 1
- 230000001276 controlling effect Effects 0.000 claims 1
- 238000004804 winding Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Control And Safety Of Cranes (AREA)
- Transmission Of Braking Force In Braking Systems (AREA)
Description
第１図は本考案一実施例の油圧回路図、第２図
はその制御電気回路図である。
１，２……主油圧ポンプ、３……走行エンジン
、４……ステアリング用油圧ポンプ、５……第１
プライオリテイ弁、６……ステアリング用サーボ
制御弁、６ａ……可変絞り、７……蓄圧器、８…
…切換弁、９……第２プライオリテイ弁、１０…
…オリフイス、１１……逆止弁、１２……蓄圧用
リリーフ弁、２２……かじ取り用リリーフ弁。
FIG. 1 is a hydraulic circuit diagram of an embodiment of the present invention, and FIG. 2 is a control electrical circuit diagram thereof. 1, 2...Main hydraulic pump, 3...Travel engine, 4...Steering hydraulic pump, 5...First
Priority valve, 6... Steering servo control valve, 6a... Variable throttle, 7... Pressure accumulator, 8...
...Switching valve, 9...Second priority valve, 10...
... Orifice, 11 ... Check valve, 12 ... Pressure accumulation relief valve, 22 ... Steering relief valve.
Claims (1)
結し得るオーバラン検出装置付きの走行エンジン
３にステアリング用油圧ポンプ４を常時連結して
、該ステアリング用油圧ポンプの吐出口に接続し
た第１プライオリテイ弁５が、ステアリング用サ
ーボ制御弁６に常に規制流量を優先供給するよう
に、該サーボ制御弁内の可変絞り６ａ前後の圧力
の差によつて制御される構成を持つクレーン車に
おいて、第１プライオリテイ弁の余剰流量出口に
、これをタンクに接続する常時位置と、巻胴駆動
装置のクラツチ及びブレーキ制御用の蓄圧器７に
接続する切換位置とを備える切換弁８を接続し、
該切換弁より蓄圧器への油路中に第２プライオリ
テイ弁９とオリフイス１０と逆止弁１１とを順次
挿入して、該オリフイス前後の圧力の差によつて
第２プライオリテイ弁が蓄圧器に規制流量を優先
供給するように構成し、前記オリフイスと逆止弁
との間の油路に、通常のかじ取り時における前記
可変絞り６ａの二次側圧力と、前記主油圧ポンプ
の吐出油圧を制限する荷役用リリーフ弁の設定圧
力との中間の設定圧力を持つ蓄圧用リリーフ弁１
２を接続し、且つオーバラン検出装置が信号或い
は警報を発した時に前記切換弁を切換位置に切換
える手段を設けたことを特徴とするクレーン車の
リターダ装置。 A steering hydraulic pump 4 is always connected to a traveling engine 3 equipped with an overrun detection device to which main hydraulic pumps 1 and 2 for driving the crane can be interlocked, and a first priority pump is connected to a discharge port of the steering hydraulic pump. In a crane truck having a configuration in which the valve 5 is controlled by the pressure difference before and after the variable throttle 6a in the servo control valve 6 so as to always supply the regulated flow rate to the steering servo control valve 6 with priority, the first A switching valve 8 is connected to the surplus flow outlet of the priority valve, which has a permanent position connecting it to the tank and a switching position connecting it to the pressure accumulator 7 for controlling the clutch and brake of the winding drum drive device,
A second priority valve 9, an orifice 10, and a check valve 11 are sequentially inserted into the oil path from the switching valve to the pressure accumulator, and the difference in pressure before and after the orifice causes the second priority valve to accumulate pressure. The secondary side pressure of the variable throttle 6a during normal steering and the discharge oil pressure of the main hydraulic pump are configured to preferentially supply a regulated flow rate to the oil passageway between the orifice and the check valve. Pressure accumulation relief valve 1 with a set pressure intermediate to the set pressure of the cargo handling relief valve that limits
2 and further comprising means for switching the switching valve to a switching position when an overrun detection device issues a signal or alarm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6097889U JPH0748431Y2 (en) | 1989-05-29 | 1989-05-29 | Crane truck retarder equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6097889U JPH0748431Y2 (en) | 1989-05-29 | 1989-05-29 | Crane truck retarder equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH031873U true JPH031873U (en) | 1991-01-10 |
| JPH0748431Y2 JPH0748431Y2 (en) | 1995-11-08 |
Family
ID=31588822
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6097889U Expired - Lifetime JPH0748431Y2 (en) | 1989-05-29 | 1989-05-29 | Crane truck retarder equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0748431Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006321267A (en) * | 2005-05-17 | 2006-11-30 | Nissan Motor Co Ltd | Hydraulic control device for industrial vehicle |
-
1989
- 1989-05-29 JP JP6097889U patent/JPH0748431Y2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006321267A (en) * | 2005-05-17 | 2006-11-30 | Nissan Motor Co Ltd | Hydraulic control device for industrial vehicle |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0748431Y2 (en) | 1995-11-08 |
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