JPH02145979U - - Google Patents
Info
- Publication number
- JPH02145979U JPH02145979U JP5148090U JP5148090U JPH02145979U JP H02145979 U JPH02145979 U JP H02145979U JP 5148090 U JP5148090 U JP 5148090U JP 5148090 U JP5148090 U JP 5148090U JP H02145979 U JPH02145979 U JP H02145979U
- Authority
- JP
- Japan
- Prior art keywords
- liquid chamber
- piston
- control port
- port
- impact device
- 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
- 239000007788 liquid Substances 0.000 claims description 8
- 230000001105 regulatory effect Effects 0.000 claims 2
Description
第１図は、この考案の一実施例である液圧式打
撃装置のストローク可変機構の縦断面図、第２図
は、弁室付近の拡大断面図である。
図中、１……シリンダ、２……ピストン、３…
…前部液室、４……後部液室、５……切換弁、６
……高圧回路、１０……低圧回路、１２……バル
ブプラグ、１７……弁室、２３……弁制御液室、
２６……弁制御通路、２８……制御ポート、３０
……可変絞り、３１……最大ストローク規制用バ
イパスである。
FIG. 1 is a longitudinal sectional view of a variable stroke mechanism of a hydraulic impact device which is an embodiment of this invention, and FIG. 2 is an enlarged sectional view of the vicinity of the valve chamber. In the figure, 1... cylinder, 2... piston, 3...
...Front liquid chamber, 4...Rear liquid chamber, 5...Switching valve, 6
... High pressure circuit, 10 ... Low pressure circuit, 12 ... Valve plug, 17 ... Valve chamber, 23 ... Valve control liquid chamber,
26... Valve control passage, 28... Control port, 30
. . . variable throttle, 31 . . . maximum stroke regulation bypass.
Claims (1)
を摺嵌して前部液室と後部液室とを形成し、後部
液室を切換弁で高圧と低圧とに切換えてピストン
を往復動させる液圧式打撃装置において、ピスト
ンの往復動に伴つて開閉される制御ポートを前部
液室に設け、該制御ポートと弁制御液室とを連通
させて設けた弁制御通路に可変絞りを介設すると
ともに、可変絞りの下流側と、制御ポートの後方
に設けた規制ポートとを接続する最大ストローク
規制用バイパスを設けたことを特徴とする液圧式
打撃装置のストローク可変機構。 A hydraulic type in which a piston with small diameter parts at the front and rear is slid into the cylinder to form a front liquid chamber and a rear liquid chamber, and the rear liquid chamber is switched between high pressure and low pressure with a switching valve to reciprocate the piston. In the impact device, a control port that opens and closes as the piston reciprocates is provided in the front liquid chamber, and a variable throttle is interposed in the valve control passage provided by communicating the control port and the valve control liquid chamber. A variable stroke mechanism for a hydraulic impact device, characterized in that a maximum stroke regulating bypass is provided that connects the downstream side of the variable throttle and a regulating port provided at the rear of the control port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5148090U JPH02145979U (en) | 1990-05-17 | 1990-05-17 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5148090U JPH02145979U (en) | 1990-05-17 | 1990-05-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02145979U true JPH02145979U (en) | 1990-12-11 |
Family
ID=31570966
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5148090U Pending JPH02145979U (en) | 1990-05-17 | 1990-05-17 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02145979U (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57174594A (en) * | 1981-04-22 | 1982-10-27 | Furukawa Kogyo Kk | Strike mechanism of liquid pressure type rock drilling machine |
| JPS57205077A (en) * | 1981-06-12 | 1982-12-16 | Furukawa Kogyo Kk | Converting mechanism for piston stroke of hydraulic type impact tool |
| JPS5871083A (en) * | 1981-10-20 | 1983-04-27 | 株式会社山本鉄工所 | Striking device |
-
1990
- 1990-05-17 JP JP5148090U patent/JPH02145979U/ja active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57174594A (en) * | 1981-04-22 | 1982-10-27 | Furukawa Kogyo Kk | Strike mechanism of liquid pressure type rock drilling machine |
| JPS57205077A (en) * | 1981-06-12 | 1982-12-16 | Furukawa Kogyo Kk | Converting mechanism for piston stroke of hydraulic type impact tool |
| JPS5871083A (en) * | 1981-10-20 | 1983-04-27 | 株式会社山本鉄工所 | Striking device |
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