Title:
POWER TOOL FOR GENERATING AN INSTANTANEOUS TORQUE
Document Type and Number:
WIPO Patent Application WO/2021/035512
Kind Code:
A1
Abstract:
A power tool (10) including a transmission mechanism (12), an output shaft (14) driven by the transmission mechanism (12), and a hydraulic unit (16) filled with a working fluid. The hydraulic unit (16) is disposed coaxially with the output shaft (14), and defines a rotatively driving mechanism (18), a first fluid chamber (20), and a second fluid chamber (22). The first fluid chamber (20) is in intermittently fluid connection with the second fluid chamber (22) via a fluid channel (28). A relative rotation between the hydraulic unit (16) and the output shaft (14) causes the rotatively driving mechanism (18) to axially compress or expand a volume of the second fluid chamber (22) for raising or decreasing a fluid pressure of the second fluid chamber (22), generating a pressure difference between the first fluid chamber (20) and the second fluid chamber (22) to cause an instantaneous torque to the output shaft (14).
Inventors:
MA LIGUO (CN)
ZHOU JINGFENG (CN)
LIANG RUI (CN)
ZHOU JINGFENG (CN)
LIANG RUI (CN)
Application Number:
PCT/CN2019/102722
Publication Date:
March 04, 2021
Filing Date:
August 27, 2019
Export Citation:
Assignee:
TECHTRONIC CORDLESS GP (US)
International Classes:
B25B21/02
Foreign References:
| TW201544264A | 2015-12-01 | |||
| CN109421012A | 2019-03-05 | |||
| CN105443034A | 2016-03-30 | |||
| CN1782445A | 2006-06-07 | |||
| CN105201402A | 2015-12-30 | |||
| US5704434A | 1998-01-06 |
Other References:
See also references of EP 4021683A4
Attorney, Agent or Firm:
RUNPING & PARTNERS (CN)
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