JPH0425423Y2 - - Google Patents
Info
- Publication number
- JPH0425423Y2 JPH0425423Y2 JP1985083799U JP8379985U JPH0425423Y2 JP H0425423 Y2 JPH0425423 Y2 JP H0425423Y2 JP 1985083799 U JP1985083799 U JP 1985083799U JP 8379985 U JP8379985 U JP 8379985U JP H0425423 Y2 JPH0425423 Y2 JP H0425423Y2
- Authority
- JP
- Japan
- Prior art keywords
- wheel steering
- steering
- switching valve
- rear wheel
- cylinders
- 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.)
- Expired
Links
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
Landscapes
- Jib Cranes (AREA)
- Steering-Linkage Mechanisms And Four-Wheel Steering (AREA)
Description
【考案の詳細な説明】
〔産業上の利用分野〕
本考案は、ホイールクレーンのステアリング装
置に関するものである。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a steering device for a wheel crane.
ホイールクレーンには作業性向上の要求より、
ステアリング操作として前輪操向の他に４輪操
向、カニ操向の３つのモードを選択できるのが一
般的である。
Due to the demand for improved workability for wheel cranes,
Generally, three steering modes can be selected: front wheel steering, four-wheel steering, and crab steering.
ホイールクレーンで走行を行う場合、前輪操向
が安定性、操縦性、狭い場所での移動性等の理由
より有利である。
When traveling with a wheel crane, front wheel steering is advantageous for reasons such as stability, maneuverability, and mobility in narrow spaces.
然し、ホイールクレーンでは前方に吊荷走行を
する必要があり、吊荷走行の場合前輪操向及び４
輪操向では荷重が大きく揺れ、操縦性が著しく悪
くなる。 However, with a wheel crane, it is necessary to move the load forward, and when moving the load, the front wheel steering and four wheels are required.
When steering with wheels, the load swings significantly and maneuverability becomes significantly worse.
本考案は、上記実情を鑑み吊荷走行の場合には
後輪操向が行える様なステアリング装置を提供し
ようとするものである。 In view of the above-mentioned circumstances, the present invention aims to provide a steering device that can perform rear wheel steering when traveling with a suspended load.
本考案は、前輪ステアリングシリンダと、
後輪ステアリングシリンダと、
前記前、後輪ステアリングシリンダへの油の供
給を切離した状態、又は前、後輪ステアリングシ
リンダを同一方向に作動するよう連通せしめる状
態、又は前、後輪ステアリングシリンダを逆方向
に作動するよう連通せしめる状態に切換え可能な
中間切換弁と、
前記中間切換弁による前、後輪ステアリングシ
リンダの切離し時にステアリング用油圧源と前輪
ステアリングシリンダとを連通せしめる状態、又
は前記中間切換弁による前、後輪ステアリングシ
リンダの連通時にステアリング用油圧源と前輪ス
テアリングシリンダ並びに中間切換弁を介して後
輪ステアリングシリンダとを連通せしめる状態、
又は前記中間切換弁による前、後輪ステアリング
シリンダの切離し時に前輪ステアリングシリンダ
に連通しているステアリング用油圧源を後輪ステ
アリングシリンダに連通せしめる状態に切換可能
な切換弁と
を備えたことを特徴とするものである。
The present invention provides a front wheel steering cylinder, a rear wheel steering cylinder, a state in which the oil supply to the front and rear wheel steering cylinders is disconnected, or a state in which the front and rear wheel steering cylinders are communicated so that they operate in the same direction. or an intermediate switching valve that can be switched to a state in which the front and rear steering cylinders are communicated so as to operate in opposite directions, and a hydraulic pressure source for steering and the front steering cylinder are connected when the front and rear steering cylinders are disconnected by the intermediate switching valve. a state in which the steering hydraulic pressure source is communicated with the front wheel steering cylinder and the rear wheel steering cylinder via the intermediate switching valve when the front and rear wheel steering cylinders are connected by the intermediate switching valve;
or a switching valve capable of switching the steering hydraulic pressure source communicating with the front steering cylinder to a state communicating with the rear steering cylinder when the front and rear steering cylinders are disconnected by the intermediate switching valve. It is something to do.
ステアリング用油圧源と前輪ステアリングシリ
ンダとを連通せしめる状態に切換弁を切換えてお
き、この状態で中間切換弁を操作し、前、後輪ス
テアリングシリンダを切離すと前輪操向のステア
リング作業が、又、前、後輪ステアリングシリン
ダを同一方向に作動するよう連通せしめると４輪
操向のステアリング作業が、又、前、後輪ステア
リングシリンダを逆方向に作動するよう連通せし
めるとカニ操向のステアリング作業が夫々可能と
なる。
If the switching valve is switched to a state where the steering hydraulic pressure source and the front wheel steering cylinder are connected, and the intermediate switching valve is operated in this state to disconnect the front and rear wheel steering cylinders, the front wheel steering operation can be performed again. If the front and rear wheel steering cylinders are connected to operate in the same direction, a four-wheel steering operation can be performed, and if the front and rear wheel steering cylinders are connected to operate in opposite directions, a crab steering operation can be performed. are possible respectively.
一方、前記中間切換弁による前、後輪ステアリ
ングシリンダの切離し時に、前輪ステアリングシ
リンダに連通しているステアリング用油圧源を切
換弁の切換えにより後輪ステアリングシリンダに
連通せしめると、後輪操向のステアリング作業が
可能となる。 On the other hand, when the front and rear wheel steering cylinders are disconnected by the intermediate switching valve, if the steering hydraulic power source communicating with the front wheel steering cylinder is communicated with the rear wheel steering cylinder by switching the switching valve, the rear wheel steering Work becomes possible.
以下図面に基づき本考案の実施例を説明する。 Embodiments of the present invention will be described below based on the drawings.
図中１R，１Lは前輪ステアリングシリンダ、２
Ｒ，２Lは後輪ステアリングシリンダを示す。 In the diagram, 1 R and 1 L are front wheel steering cylinders, 2
R and 2L indicate rear wheel steering cylinders.
図示しないパワーステアリングユニツトへ接続
される切換弁３はａ，ｂ，ｃ，ｄの４のアウトレ
ツトを持つており、その１つａは流路５を介して
前輪ステアリングシリンダ１Rのロツド側、１Lの
ヘツド側にそれぞれ接続され、アウトレツトｃは
流路６を介して中間切換弁４に接続されている。
該中間切換弁４は前輪ステアリングシリンダ１R
のヘツド側、１Lのロツド側に接続し、又流路７
を介して後輪ステアリングシリンダ２Rのロツド
側、２Lのヘツド側へ接続され、流路８を介し２R
のヘツド側、２Lのロツド側へ接続されている。
又、前記切換弁３のアウトレツトｂ，ｄはそれぞ
れ流路９，１０を介して流路７，８へ短絡してあ
る。 The switching valve 3 connected to a power steering unit (not shown) has four outlets a, b, c, and d, one of which is connected to the rod side of the front wheel steering cylinder 1 The outlet c is connected to the intermediate switching valve 4 via the flow path 6.
The intermediate switching valve 4 is connected to the front wheel steering cylinder 1 R.
Connect to the head side of the 1 L rod, and also connect to the flow path 7.
It is connected to the rod side of the rear wheel steering cylinder 2R and the head side of the rear wheel steering cylinder 2R through the flow path 8 .
It is connected to the head side of the 2L and the rod side of the 2L .
Further, the outlets b and d of the switching valve 3 are short-circuited to flow paths 7 and 8 via flow paths 9 and 10, respectively.
次に作用を説明する。 Next, the action will be explained.
切換弁３、中間切換弁４を図示の如くするとパ
ワーステアリングユニツトは前輪ステアリングシ
リンダ１R，１Lのみと接続した状態となつて前輪
操向が可能となる。切換弁３を図示の状態に保持
し、中間切換弁４を切換え前輪ステアリングシリ
ンダ１R１Lと流路７を連通させ、流路６と８とを
連通させる。この回路状態では前後のステアリン
グシリンダはそれぞれ同一の方向に作動し、４輪
操向となる。更に、中間切換弁４を切換え前輪ス
テアリングシリンダ１R，１Lと流路８とを接続
し、流路６と７とを連通すると、前後のステアリ
ングシリンダはそれぞれ逆方向に作動し、カニ操
向となる。 When the switching valve 3 and the intermediate switching valve 4 are set as shown, the power steering unit is connected only to the front wheel steering cylinders 1 R and 1 L , and front wheel steering becomes possible. The switching valve 3 is held in the state shown, and the intermediate switching valve 4 is switched to communicate the front wheel steering cylinder 1 R 1 L and the flow path 7, and to connect the flow paths 6 and 8. In this circuit state, the front and rear steering cylinders operate in the same direction, resulting in four-wheel steering. Furthermore, when the intermediate switching valve 4 is switched and the front wheel steering cylinders 1 R and 1 L are connected to the flow path 8, and the flow paths 6 and 7 are communicated, the front and rear steering cylinders operate in opposite directions, resulting in crab steering. becomes.
又、切換弁３のみを切換え流路９，１０をパワ
ーステアリングユニツトに接続させると、該パワ
ーステアリングユニツトと後輪ステアリングシリ
ンダ２R，２Lとが連通し、後輪操向が可能とな
る。 Further, when only the switching valve 3 is switched and the switching channels 9 and 10 are connected to the power steering unit, the power steering unit and the rear wheel steering cylinders 2 R and 2 L are communicated, and rear wheel steering becomes possible.
而して、上記ステアリング装置では、前輪操
向、後輪操向、４輪操向、カニ操向の全てが可能
となる。 Thus, with the above steering device, front wheel steering, rear wheel steering, four wheel steering, and crab steering are all possible.
尚、第２図の他の実施例を示すもので、前記実
施例で示した切換弁３を分割し各流路毎に切換弁
１１，１２を設け、両切換弁１１，１２を同期さ
せ作用させる様にしたものである。 In addition, this shows another embodiment of FIG. 2, in which the switching valve 3 shown in the previous embodiment is divided and switching valves 11 and 12 are provided for each flow path, and both switching valves 11 and 12 are operated in synchronization. It was designed so that
以上述べた如く本考案によれば、前輪操向、４
輪操向、カニ操向に加え後輪操向が可能となり、
吊荷の振れを小さくすることができ、吊荷走行時
の安定性が大幅に向上する。
As described above, according to the present invention, front wheel steering, four
In addition to wheel steering and crab steering, rear wheel steering is now possible.
The swing of the suspended load can be reduced, and the stability when the suspended load is traveling is greatly improved.
第１図は本考案の１実施例を示す回路図、第２
図は他の実施例を示す部分回路図を示す。
１R，１Lは前輪ステアリングシリンダ、２R，
２Lは後輪ステアリングシリンダ、３は切換弁、
４は中間切換弁を示す。
Figure 1 is a circuit diagram showing one embodiment of the present invention, Figure 2 is a circuit diagram showing one embodiment of the present invention.
The figure shows a partial circuit diagram showing another embodiment. 1 R , 1 L are front wheel steering cylinders, 2 R ,
2 L is the rear wheel steering cylinder, 3 is the switching valve,
4 indicates an intermediate switching valve.
Claims (1)
給を切離した状態、又は前、後輪ステアリングシ
リンダを同一方向に作動するよう連通せしめる状
態、又は前、後輪ステアリングシリンダを逆方向
に作動するよう連通せしめる状態に切換え可能な
中間切換弁と、 前記中間切換弁による前、後輪ステアリングシ
リンダの切離し時にステアリング用油圧源と前輪
ステアリングシリンダとを連通せしめる状態、又
は前記中間切換弁による前、後輪ステアリングシ
リンダの連通時にステアリング用油圧源と前輪ス
テアリングシリンダ並びに中間切換弁を介して後
輪ステアリングシリンダとを連通せしめる状態、
又は前記中間切換弁による前、後輪ステアリング
シリンダの切離し時に前輪ステアリングシリンダ
に連通しているステアリング用油圧源を後輪ステ
アリングシリンダに連通せしめる状態に切換可能
な切換弁と を備えたことを特徴とするホイールクレーンのス
テアリング装置。[Claims for Utility Model Registration] A front wheel steering cylinder, a rear wheel steering cylinder, and a state in which the oil supply to the front and rear wheel steering cylinders is disconnected, or in which the front and rear wheel steering cylinders are operated in the same direction. an intermediate switching valve that can be switched to a state in which the front and rear wheel steering cylinders are in communication, or a state in which the front and rear wheel steering cylinders are connected to operate in opposite directions; a state in which the steering cylinder is communicated with the steering cylinder, or a state in which the steering hydraulic pressure source is communicated with the front wheel steering cylinder and the rear wheel steering cylinder via the intermediate switching valve when the front and rear wheel steering cylinders are connected by the intermediate switching valve;
or a switching valve capable of switching the steering hydraulic pressure source communicating with the front steering cylinder to a state of communicating with the rear steering cylinder when the front and rear steering cylinders are disconnected by the intermediate switching valve. wheel crane steering device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985083799U JPH0425423Y2 (en) | 1985-06-03 | 1985-06-03 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985083799U JPH0425423Y2 (en) | 1985-06-03 | 1985-06-03 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61199475U JPS61199475U (en) | 1986-12-13 |
| JPH0425423Y2 true JPH0425423Y2 (en) | 1992-06-17 |
Family
ID=30632753
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1985083799U Expired JPH0425423Y2 (en) | 1985-06-03 | 1985-06-03 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0425423Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4652508B2 (en) * | 1999-12-28 | 2011-03-16 | 株式会社加藤製作所 | Wheel crane |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57175469A (en) * | 1981-04-24 | 1982-10-28 | Kato Seisakusho:Kk | Mobile crane |
-
1985
- 1985-06-03 JP JP1985083799U patent/JPH0425423Y2/ja not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57175469A (en) * | 1981-04-24 | 1982-10-28 | Kato Seisakusho:Kk | Mobile crane |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61199475U (en) | 1986-12-13 |
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