JPH0135822Y2 - - Google Patents
Info
- Publication number
- JPH0135822Y2 JPH0135822Y2 JP13345983U JP13345983U JPH0135822Y2 JP H0135822 Y2 JPH0135822 Y2 JP H0135822Y2 JP 13345983 U JP13345983 U JP 13345983U JP 13345983 U JP13345983 U JP 13345983U JP H0135822 Y2 JPH0135822 Y2 JP H0135822Y2
- Authority
- JP
- Japan
- Prior art keywords
- valve
- oil
- chamber
- cylinder
- pressure
- 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
- 238000009527 percussion Methods 0.000 claims description 7
- 230000002093 peripheral effect Effects 0.000 claims 1
Landscapes
- Percussive Tools And Related Accessories (AREA)
Description
【考案の詳細な説明】
(産業上の利用分野)
本考案は、油圧式打撃装置の切換バルブ制御装
置の改良に関する。[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an improvement of a switching valve control device for a hydraulic impact device.
(従来技術)
第1図に示されているように、(実開昭58−
50191号参照)油圧式打撃装置1は、シリンダ本
体2、およびこのシリンダ本体2内に摺動自在に
配され、該シリンダ本体2内を往復摺動すること
によつて、シリンダ本体前部に取り付けられたチ
ゼル(図示せず)を打撃する打撃ピストン3を備
えている。上記シリンダ本体2は、シリンダ前室
4とシリンダ後室5を有しており、シリンダ前室
4にはポート6を介して前室側給油路7が接続さ
れており、シリンダ後室5にはポート8を介して
後室側給油路9が接続されている。上記打撃ピス
トン3は、シリンダ前室4に供給された圧油の作
用を受ける前側受圧面3a、シリンダ後室5に供
給された圧油の作用を受ける後側受圧面3b、お
よびその長手方向の中間位置に設けられた環状の
溝部3cを備えている。上記打撃ピストンの後側
受圧面は前側受圧面より大きく設定されており、
この面積差により両受圧面に圧油が作用したと
き、打撃ピストン3を前進させるようにしてい
る。(Prior art) As shown in Fig. 1,
(Refer to No. 50191) The hydraulic impact device 1 is arranged in a cylinder body 2 and slidably within the cylinder body 2, and is attached to the front part of the cylinder body by sliding back and forth within the cylinder body 2. It is equipped with a striking piston 3 for striking a chisel (not shown) that is attached to the machine. The cylinder body 2 has a cylinder front chamber 4 and a cylinder rear chamber 5. A front chamber side oil supply passage 7 is connected to the cylinder front chamber 4 via a port 6, and a cylinder rear chamber 5 is connected to the cylinder front chamber 4 through a port 6. A rear chamber side oil supply path 9 is connected via the port 8 . The striking piston 3 has a front pressure-receiving surface 3a that receives the action of pressure oil supplied to the cylinder front chamber 4, a rear pressure-reception surface 3b that receives the action of the pressure oil supplied to the cylinder rear chamber 5, and a longitudinal direction thereof. It has an annular groove 3c provided at an intermediate position. The rear pressure receiving surface of the above-mentioned impact piston is set larger than the front pressure receiving surface,
Due to this difference in area, when pressure oil acts on both pressure receiving surfaces, the striking piston 3 is moved forward.
上記後室側給油路9には、上記シリンダ前室4
およびシリンダ後室5への圧油の供給を切換える
切換バルブ10が設けられている。この切換バル
ブ10は、バルブ前室11とバルブ後室12を備
えたバルブケース13、および該バルブケース1
3内に摺動自在に嵌合され、上記バルブ前室11
に供給される圧油の圧力を受ける前側受圧面14
aと、上記バルブ後室12に供給される圧油の圧
力を受ける後側受圧面14bとを備えたバルブ本
体14を有している。このバルブ本体14の後側
受圧面14bは、前側受圧面14aより大きく設
定されている。上記バルブ後室12とシリンダ前
室4とは、ポート6より後方に形成されたポート
15を介してパイロツト油路16によつて連通さ
れている。シリンダ本体2には、更に該ポート1
5とポート8の間にドレンポート17が形成され
ている。このドレンポート17には、打撃ピスト
ン3の後退ストローク終期に、上記パイロツト油
路16ならびに該打撃ピストン3の環状溝部3c
を介して、上記バルブ後室12の圧油をドレンす
るパイロツト排油路18が連通している。 The rear chamber side oil supply passage 9 includes the cylinder front chamber 4.
A switching valve 10 for switching the supply of pressure oil to the cylinder rear chamber 5 is also provided. This switching valve 10 includes a valve case 13 having a valve front chamber 11 and a valve rear chamber 12, and the valve case 1.
3 and is slidably fitted into the valve front chamber 11.
The front pressure receiving surface 14 receives the pressure of the pressure oil supplied to the
a, and a rear pressure receiving surface 14b that receives the pressure of the pressure oil supplied to the valve rear chamber 12. The rear pressure receiving surface 14b of this valve body 14 is set larger than the front pressure receiving surface 14a. The valve rear chamber 12 and the cylinder front chamber 4 are communicated with each other by a pilot oil passage 16 via a port 15 formed rearward of the port 6. The cylinder body 2 further includes the port 1
A drain port 17 is formed between 5 and port 8. The drain port 17 is connected to the pilot oil passage 16 and the annular groove 3c of the striking piston 3 at the end of the backward stroke of the striking piston 3.
A pilot oil drain passage 18 for draining the pressure oil from the valve rear chamber 12 is connected through the valve rear chamber 12.
以上説明したように従来の切換バルブ10が組
込まれた油圧式打撃装置1においては、打撃ピス
トン3の各ストロークにおけるタイミングの関係
から、上記打撃ピストン3がまだ完全に後退して
いない後退ストロークの終期において、バルブ後
室12がパイロツト排油路18に連通されるよう
になつているので、打撃ピストン3がまだ完全に
後退しきらないうちに、バルブ後室12が低圧と
なり、従つてバルブ本体14が後退して、後室側
給油路9を開く、このため、該後室側給油路9を
介してシリンダ後室5に圧油が供給されるので、
打撃ピストン3は前進ストロークに切換わる。こ
のように前進ストロークに切換わると打撃ピスト
ン3が再びポート17を閉じてしまうので、バル
ブ後室12内の圧油はドレンされなくなる。する
と、バルブ本体14は最終端まで後退しないで途
中で止まり、従つて給油路9が完全に開かれてい
ない状態で、打撃ピストン3の前進ストロークが
行なわれる。以上の理由により、従来の切換バル
ブ10を備えた打撃装置1はその性能を十分発揮
できないという欠点があつた。 As explained above, in the hydraulic percussion device 1 incorporating the conventional switching valve 10, due to the timing relationship in each stroke of the percussion piston 3, the percussion piston 3 is not completely retracted yet at the end of the backward stroke. Since the valve rear chamber 12 is communicated with the pilot oil drain passage 18, the pressure in the valve rear chamber 12 becomes low before the striking piston 3 is completely retracted, and therefore the valve body 14 moves back and opens the rear chamber side oil supply passage 9. Therefore, pressurized oil is supplied to the cylinder rear chamber 5 via the rear chamber side oil supply passage 9.
The percussion piston 3 switches to a forward stroke. When switching to the forward stroke in this manner, the impact piston 3 closes the port 17 again, so that the pressure oil in the valve rear chamber 12 is no longer drained. Then, the valve body 14 does not retreat to the final end, but stops midway, and therefore, the forward stroke of the striking piston 3 is performed while the oil supply passage 9 is not completely opened. For the above reasons, the impact device 1 equipped with the conventional switching valve 10 has the disadvantage that its performance cannot be fully demonstrated.
(考案の目的)
そこで本考案は、従来装置の欠点に鑑み、油圧
式打撃装置の性能を十分発揮させることができる
切換バルブ制御装置を提供することを目的とする
ものである。(Purpose of the invention) In view of the drawbacks of conventional devices, an object of the present invention is to provide a switching valve control device that can fully demonstrate the performance of a hydraulic impact device.
(考案の構成)
本考案は、上記したような構成の油圧式打撃装
置の切換バルブ制御装置において、前記バルブケ
ースの前記バルブ本体のストロール中間位置に対
応する位置に開口する補助排油路を設けるととも
に、前記バルブ本体の外周面に、このバルブ本体
の後退途中で前記バルブ後室を前記補助排油路に
連通させる排油中継路を形成し、該排油中継路の
長さが、前記打撃ピストンがその前進初期に前記
パイロツト排油路を閉じた後も、前記バルブ本体
が後退動作を持続することができるように、前記
排油中継路を介して前記バルブ後室と前記補助排
油路との連通を継続させることができるように設
定されていることを特徴とするものである。(Structure of the invention) The present invention provides a switching valve control device for a hydraulic impact device configured as described above, in which an auxiliary oil drain path is provided in the valve case at a position corresponding to the stroke intermediate position of the valve body. Additionally, an oil drain relay path is formed on the outer circumferential surface of the valve body to communicate the valve rear chamber with the auxiliary oil drain path while the valve body is retracting, and the length of the oil drain relay path is equal to or greater than the impact. The valve rear chamber and the auxiliary oil drain passage are connected to each other via the oil drain relay passage so that the valve body can continue to move backward even after the piston closes the pilot oil drain passage at the beginning of its forward movement. It is characterized by being set so that communication with the user can be continued.
(実施例)
以下添付図面を参照しつつ本考案の好ましい実
施例による油圧式打撃装置の切換バルブ制御装置
について説明する。(Embodiment) A switching valve control device for a hydraulic impact device according to a preferred embodiment of the present invention will be described below with reference to the accompanying drawings.
第2図は、本考案の実施例による切換バルブ制
御装置30の主要部を示す断面図である。なお、
打撃装置自体は第1図に示したものと同様の構造
のものを用い、また切換バルブ制御装置30につ
いても、全体の構造はほぼ第1図に示した切換バ
ルブ10と同様であるので、同一の部分について
はバルブ10と同じ符号を付してその説明を省略
する。 FIG. 2 is a sectional view showing the main parts of the switching valve control device 30 according to the embodiment of the present invention. In addition,
The striking device itself has a structure similar to that shown in FIG. 1, and the switching valve control device 30 has the same overall structure as the switching valve 10 shown in FIG. The same reference numerals as those of the valve 10 are given to the parts, and the explanation thereof will be omitted.
上記バルブケース13には、バルブ本体14の
ストローク中間位置に対応する位置にポート31
が形成されており、このポート31には、パイロ
ツト排油路18のバルブ後室12の排油作用を補
助する補助排油路32が連通されている。一方、
上記バルブ本体14には、バルブケース13との
摺接面に長手方向に延びる排油中継路33が形成
されている。この排油中継路33は、上記バルブ
本体14の後退ストロークの途中で上記バルブ後
室12を上記補助排油路32に連通させる作用を
なすものであつて、その長さは、上記打撃ピスト
ン3がその前進ストローク初期において上記パイ
ロツト排油路18を閉じた後も、上記バルブ後室
12と補助排油路32との間の連通を維持させる
ことのできる長さに設定されている。 The valve case 13 has a port 31 located at a position corresponding to the mid-stroke position of the valve body 14.
This port 31 is connected to an auxiliary oil drain passage 32 that assists the pilot oil drain passage 18 in draining oil from the rear valve chamber 12 . on the other hand,
In the valve body 14, an oil drain relay path 33 extending in the longitudinal direction is formed on a surface in sliding contact with the valve case 13. This oil drain relay passage 33 has the function of communicating the valve rear chamber 12 with the auxiliary oil drain passage 32 during the backward stroke of the valve body 14, and its length is the same as that of the striking piston 3. The length is set such that communication between the rear valve chamber 12 and the auxiliary oil drain passage 32 can be maintained even after the pilot oil drain passage 18 is closed at the beginning of its forward stroke.
(考案の効果)
従つて、上記バルブ後室12内の圧油は、打撃
ピストン3がその前進ストローク初期において上
記パイロツト排油路18を閉じた後も、排油中継
路33を介して補助排油路32からドレンされ続
けるので、上記バルブ本体14はその後退動作を
続け、最終的にはその最後端位置まで後退し、そ
の結果後室側給油路9を完全に開くことができ
る。かくして、この後室側給油路9を介して十分
な圧油をシリンダ後室5に供給することができる
ので打撃装置1の性能を十分に引き出すことがで
きる。考案者らの実験によれば、従来装置におい
ては、打撃力が330Kg−mであつたものが、本考
案装置においては432Kg−mとなり、打撃力が約
30%向上した。(Effect of the invention) Therefore, even after the impact piston 3 closes the pilot oil drain passage 18 at the beginning of its forward stroke, the pressure oil in the valve rear chamber 12 is sent to the auxiliary drain via the oil drain relay passage 33. Since the oil continues to be drained from the oil passage 32, the valve body 14 continues its backward movement and finally retreats to its rearmost position, so that the rear chamber side oil supply passage 9 can be completely opened. In this way, sufficient pressure oil can be supplied to the cylinder rear chamber 5 via this rear chamber side oil supply path 9, so that the performance of the striking device 1 can be fully brought out. According to experiments conducted by the inventors, the impact force was 330Kg-m with the conventional device, but it was 432Kg-m with the device of the present invention, and the impact force was approximately
Improved by 30%.
第1図は、従来の切換バルブを組込んだ油圧式
打撃装置を示す断面図、第2図は、本考案の切換
バルブ制御装置の主要部を示す断面図である。
1……油圧式打撃装置、2……シリンダ本体、
3……打撃ピストン、3a……前側受圧面、3b
……後側受圧面、3c……環状の溝部、4……シ
リンダ前室、5……シリンダ後室、7……前室給
油路、9……後室給油路、30……切換バルブ制
御装置、11……バルブ前室、12……バルブ後
室、13……バルブケース、14……バルブ本
体、32……補助排油路、33……排油中継路。
FIG. 1 is a sectional view showing a hydraulic impact device incorporating a conventional switching valve, and FIG. 2 is a sectional view showing the main parts of the switching valve control device of the present invention. 1... Hydraulic impact device, 2... Cylinder body,
3...Blow piston, 3a...Front pressure receiving surface, 3b
... Rear pressure receiving surface, 3c ... Annular groove, 4 ... Cylinder front chamber, 5 ... Cylinder rear chamber, 7 ... Front chamber oil supply path, 9 ... Rear chamber oil supply path, 30 ... Switching valve control Device, 11... Valve front chamber, 12... Valve rear chamber, 13... Valve case, 14... Valve body, 32... Auxiliary oil drain path, 33... Oil drain relay path.
Claims (1)
ダ本体、該シリンダ本体内に摺動自在に配され、
前記シリンダ前室に供給される圧油の圧力を受け
る前側受圧面と、前記シリンダ後室に供給される
圧油の圧力を受ける後側受圧面と、長手方向の中
間位置に設けられた環状の溝部とを備えた打撃ピ
ストン、および前記シリンダ前室およびシリンダ
後室への圧油の供給を切換える切換バルブを有し
前記打撃ピストンの後側受圧面は前側受圧面より
大きく設定されており、前記シリンダ本体のシリ
ンダ前室およびシリンダ後室には、それぞれ前室
側給油路および後室側給油路が連通されており、
前記切換バルブは、バルブ前室とバルブ後室とを
有するバルブケース、および該バルブケース内に
摺動自在に嵌合され、前記バルブ前室に供給され
る圧油の圧力を受ける前側受圧面と、前記バルブ
後室に供給される圧油の圧力を受ける後側受圧面
とを備えたバルブ本体を有し、該バルブ本体の後
側受圧面は前側受圧面より大きく設定されており
前記バルブ後室と前記シリンダ前室の給油路開口
部より後方部分とはパイロツト油路によつて連通
されており、前記シリンダ本体の前記パイロツト
油路の開口部と前記後室側給油路の開口部の間に
開口し、前記打撃ピストンの後退終期に前記パイ
ロツト油路ならびに前記打撃ピストンの環状溝部
を介して前記バルブ後室の圧油をドレンするパイ
ロツト排油路が設けられた油圧式打撃装置の切換
バルブ制御装置において、前記バルブケースの前
記バルブ本体のストロール中間位置に対応する位
置に開口する補助排油路を設けるとともに、前記
バルブ本体の外周面に、このバルブ本体の後退途
中で前記バルブ後室を前記補助排油路に連通させ
る排油中継路を形成し、該排油中継路の長さが、
前記打撃ピストンがその前進初期に前記パイロツ
ト排油路を閉じた後も、前記バルブ本体が後退動
作を持続することができるように、前記排油中継
路を介して前記バルブ後室と前記補助排油路との
連通を継続させることができるように設定されて
いることを特徴とする油圧式打撃装置の切換バル
ブ制御装置。 A cylinder body including a cylinder front chamber and a cylinder rear chamber, slidably arranged within the cylinder body,
A front pressure receiving surface receives the pressure of the pressure oil supplied to the cylinder front chamber, a rear pressure receiving surface receives the pressure of the pressure oil supplied to the cylinder rear chamber, and an annular ring provided at an intermediate position in the longitudinal direction. and a switching valve for switching the supply of pressure oil to the cylinder front chamber and the cylinder rear chamber, and the rear pressure receiving surface of the striking piston is set larger than the front pressure receiving surface, and the A front chamber side oil supply passage and a rear chamber side oil supply passage are communicated with the cylinder front chamber and cylinder rear chamber of the cylinder body, respectively.
The switching valve includes a valve case having a valve front chamber and a valve rear chamber, and a front pressure receiving surface that is slidably fitted into the valve case and receives the pressure of pressure oil supplied to the valve front chamber. , the valve body has a rear pressure receiving surface that receives the pressure of the pressure oil supplied to the rear chamber of the valve, and the rear pressure receiving surface of the valve body is set larger than the front pressure receiving surface, and the rear pressure receiving surface of the valve body is set larger than the front pressure receiving surface. The chamber and a portion rearward of the oil supply passage opening of the cylinder front chamber are communicated by a pilot oil passage, and between the opening of the pilot oil passage of the cylinder body and the opening of the rear chamber side oil supply passage. A switching valve for a hydraulic percussion device, which is provided with a pilot oil drain passage that opens to the rear of the valve and drains pressure oil from the valve rear chamber through the pilot oil passage and an annular groove of the percussion piston at the end of the retraction of the percussion piston. In the control device, an auxiliary oil drain passage is provided in the valve case that opens at a position corresponding to the stroke intermediate position of the valve body, and the valve rear chamber is formed on the outer peripheral surface of the valve body while the valve body is retracting. A drain oil relay path is formed to communicate with the auxiliary oil drain path, and the length of the drain oil relay path is
Even after the striking piston closes the pilot oil drainage passage at the beginning of its forward movement, the valve body is connected to the auxiliary oil drainage chamber via the oil drainage relay passage so that the valve body can continue its backward movement. 1. A switching valve control device for a hydraulic impact device, characterized in that the control device is configured to allow continuous communication with an oil passage.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13345983U JPS6042578U (en) | 1983-08-29 | 1983-08-29 | Hydraulic impact device switching valve control device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13345983U JPS6042578U (en) | 1983-08-29 | 1983-08-29 | Hydraulic impact device switching valve control device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6042578U JPS6042578U (en) | 1985-03-26 |
JPH0135822Y2 true JPH0135822Y2 (en) | 1989-11-01 |
Family
ID=30301035
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13345983U Granted JPS6042578U (en) | 1983-08-29 | 1983-08-29 | Hydraulic impact device switching valve control device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6042578U (en) |
-
1983
- 1983-08-29 JP JP13345983U patent/JPS6042578U/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS6042578U (en) | 1985-03-26 |
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