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1. 发明专利

JP2000234488A EARTH DRILL BUCKET AND EARTH DRILL 失效
公开(公告)号：JP2000234488A
公开(公告)日：2000-08-29
申请号：JP3670699
申请日：1999-02-16
申请人： SUGIZAKI KISO KK , HITACHI CONSTRUCTION MACHINERY
发明人： IMAI KENJI , MURAOKA TADASHI , AIHARA YOSHIHIRO , SHIBA YOSHIMI , HASHIMOTO KENTARO , MURAYAMA TAKASHI
IPC分类号： E21B11/00
摘要： PROBLEM TO BE SOLVED: To certainly open and close an earth take-in port with a rotary plate made to make a relative rotation by rotary movement of a bucket main body by a method wherein the rotary plate with excavation bits fixed thereto is rotatively mounted to a bottom lid of the bucket and the earth take-in port is made capable of being opened and closed. SOLUTION: For an earth drill bucket 1, a cylindrical part 2 is fixed to a cylindrical main body 1a through a radial frame and made capable of moving upward and downward with a guide rod inserted therethrough, bottom lids 6, 6 are rotatively mounted to the main body 1a through pins 5, 5, and earth take-in ports 8, 8 are formed between the bottom lids 6, 6. Then, a rotary plate 9 is rotatively mounted to the underside of the bottom lids 6 through guide grooves 11, and excavation bits 10 are fixed to end parts of the rotary plate 9. With the bucket 1 pressed against the ground and rotated at the time of starting excavation, the rotary plate 9 makes a relative rotation and opens the earth take-in port 8 for taking excavated earth into the bucket 1, and with the bucket 1 rotated in reverse rotation, the rotary plate 9 makes a relative rotation and closes the earth take-in port 8. Therefore, the earth take-in port 8 can be opened and closed certainly.

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