Title:
ELECTRIC CONSTRUCTION MACHINE
Document Type and Number:
WIPO Patent Application WO/2014/030415
Kind Code:
A1
Abstract:
Provided is an electric construction machine in which current can be prevented from reaching, via a point at which power-transmission systems are joined to each other, a connector to which an external power supply is not connected. Said power-transmission systems (71A, 71B, 71C) are connected to connectors (59A, 59B, 59C) and are connected, downstream of a common system (73) where the power-transmission systems (71A, 71B, 71C) are joined to each other, to a control device (35) that has battery-charging functionality. The power-transmission systems (71A, 71B, 71C) are provided with switches (74Aa, 74Ab, 74Ba, 74Bb, 74Ca, 74Cb). In relay circuits (75A, 75B, 75C), if a plug for an external power supply is connected to one of the connectors (59A, 59B, 59C), a coil in a control relay (one of 76A, 76B, and 76C) that responds to the connection of connector-side and plug-side connection-detection terminals is energized, the contacts of said control relay move to a closed position, a coil in the corresponding switch is energized via said contacts, and the contacts of said switch move to a closed position.
Inventors:
YUNOUE MASAYUKI (JP)
TAKISHITA TATSUO (JP)
KURIKUMA HAJIME (JP)
TAKISHITA TATSUO (JP)
KURIKUMA HAJIME (JP)
Application Number:
PCT/JP2013/066831
Publication Date:
February 27, 2014
Filing Date:
June 19, 2013
Export Citation:
Assignee:
HITACHI CONSTRUCTION MACHINERY (JP)
International Classes:
E02F9/00
Foreign References:
| JP2009215855A | 2009-09-24 | |||
| JP2009278706A | 2009-11-26 | |||
| JP2011172408A | 2011-09-01 | |||
| JP2012001889A | 2012-01-05 |
Other References:
See also references of EP 2889432A4
Attorney, Agent or Firm:
KASUGA Yuzuru (JP)
Kasuga 讓 (JP)
Kasuga 讓 (JP)
Download PDF: