Title:
HOLLOW ROTARY DRILLING MECHANISM WITH COMBINATION OF VANE MOTOR DRIVING AND PLANETARY GEAR SPEED REDUCTION
Document Type and Number:
WIPO Patent Application WO/2019/174559
Kind Code:
A1
Abstract:
Disclosed is a hollow rotary drilling mechanism with a combination of vane motor driving and planetary gear speed reduction. The hollow rotary drilling mechanism comprises a bit shank sleeve (11), and the bit shank sleeve (11) is driven by a vane pump and planetary gear speed reducer combination (27) to realize a rotary drilling motion. Power transmission between a vane pump and a planetary speed reducer is realized by providing an integrated impeller-sun gear (29). The center of gyration of the impeller-sun gear (29) is the same as that of the planetary speed reducer and the bit shank sleeve (11), thereby reducing the size of a transmission chain and improving the transmission efficiency.
Inventors:
LI YONGSHENG (CN)
WANG XIANZHONG (CN)
WANG WEILIN (CN)
WANG QIUJING (CN)
ZHANG JIEYU (CN)
ZHANG BAOYAN (CN)
WANG XIANZHONG (CN)
WANG WEILIN (CN)
WANG QIUJING (CN)
ZHANG JIEYU (CN)
ZHANG BAOYAN (CN)
Application Number:
PCT/CN2019/077746
Publication Date:
September 19, 2019
Filing Date:
March 12, 2019
Export Citation:
Assignee:
SHANDONG TIANRUI HEAVY IND CO LTD (CN)
International Classes:
E21B4/10; F16H47/12
Foreign References:
| CN108223756A | 2018-06-29 | |||
| CN2359465Y | 2000-01-19 | |||
| CN2130205Y | 1993-04-21 | |||
| CN202194562U | 2012-04-18 | |||
| CN201771423U | 2011-03-23 | |||
| US20130165292A1 | 2013-06-27 |
Attorney, Agent or Firm:
BOXIN CHINA INTELLECTUAL PROPERTY (CN)
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