| 摘要 |
<p>The present invention relates to a hydraulic rotating striking device having a shock buffering device, which is configured to buffer a shock, formed to be able to reciprocate inside a body portion of the striking device. The hydraulic rotating striking device comprises, between the body portion and the outer peripheral surface of the shock device, a high-pressure chamber, a first low-pressure chamber, a second low-pressure chamber, a first pressure chamber, and a second pressure chamber, respectively. The shock buffering device is characterized by comprising: an annular collar portion formed at the center of an outer diameter portion; an upper diameter portion formed on the upper side of the collar portion, the upper end surface of the upper diameter portion facing the inner upper end of the body portion; a lower diameter portion formed on the lower side of the collar portion, the lower end surface of the lower diameter portion facing a striking surface of a shank; and a second bypass channel for establishing communication between the high-pressure chamber and the second pressure chamber, when the distance of movement is below a preset distance during a boring operation, and interrupting the communication between the high-pressure chamber and the second pressure chamber, when the distance of movement is equal to or above the preset distance.</p> |
