Title:
POWER SUPPLY UNIT AND SWIVEL JOINT
Document Type and Number:
WIPO Patent Application WO/2024/057761
Kind Code:
A1
Abstract:
Provided is a power supply unit 50 to be attached to a swivel joint, said unit comprising: a rotary transformer 53 that is connected to an upper slewing unit and a lower running unit of a work vehicle; an oscillation circuit 52 that is connected to the upper slewing unit and that converts electric power into AC and supplies the AC to the rotary transformer; and a smoothing circuit 54 that is connected to the lower running unit and that converts electric power output from the rotary transformer 53 into DC. The negative-side electrode of the smoothing circuit 54 is electrically connected to the chassis of the lower running unit, and the positive-side electrode of the smoothing circuit 54 is taken out from the lower part of the swivel joint via a cable inserted through a pipe 21 provided running axially along the interior of the swivel joint.
Inventors:
KAGEYAMA MASATO (JP)
NABATA JUN (JP)
NABATA JUN (JP)
Application Number:
PCT/JP2023/028397
Publication Date:
March 21, 2024
Filing Date:
August 03, 2023
Export Citation:
Assignee:
KOMATSU MFG CO LTD (JP)
International Classes:
F16L39/04; E02F9/00; F16L27/08
Domestic Patent References:
| WO2019230507A1 | 2019-12-05 | |||
| WO2020189246A1 | 2020-09-24 | |||
| WO2022071426A1 | 2022-04-07 |
Foreign References:
| JPH1166485A | 1999-03-09 | |||
| JP2014505185A | 2014-02-27 | |||
| JPS63266292A | 1988-11-02 | |||
| JPH1129960A | 1999-02-02 | |||
| JPS5166965U | 1976-05-27 | |||
| JPH06228989A | 1994-08-16 |
Attorney, Agent or Firm:
SAKAI INTERNATIONAL PATENT OFFICE (JP)
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