Invention Grant
- Patent Title: Construction equipment having electric control lever
- Patent Title (中): 施工设备具有电动控制杆
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Application No.: US12795038Application Date: 2010-06-07
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Publication No.: US08544263B2Publication Date: 2013-10-01
- Inventor: Dong Soo Kim
- Applicant: Dong Soo Kim
- Applicant Address: SE Eskilstuna
- Assignee: Volvo Construction Equipment Holding Sweden AB
- Current Assignee: Volvo Construction Equipment Holding Sweden AB
- Current Assignee Address: SE Eskilstuna
- Agency: Ladas & Parry LLP
- Priority: KR10-2009-0052903 20090615
- Main IPC: F16D31/02
- IPC: F16D31/02 ; F15B13/044

Abstract:
Construction equipment having an electric control lever is provided, which can intercept a control signal applied to a flow control valve when trouble occurs in the electric control lever or a control unit. The construction equipment includes an electric control lever outputting a manipulation signal in proportion to a manipulation amount, a manipulation locking lever outputting a manipulation signal for control in preference to the manipulation signal when an error occurs in the manipulation signal, an electronic flow control valve installed in a flow path between the hydraulic pump and the hydraulic actuator and shifted, by signal pressure input in proportion to the manipulation signal, to control a start, a stop, and a direction change of the hydraulic actuator, a control unit having an operation unit operating a control signal that corresponds to the manipulation signal, and a current driving unit controlling current so that a current value corresponding to the control signal can be applied to the electronic flow control valve, and a power control unit intercepting current applied from the current driving unit to the electronic flow control valve when the manipulation locking lever is manipulated in a state where trouble has occurred in the electric control lever or the control unit.
Public/Granted literature
- US20100313556A1 CONSTRUCTION EQUIPMENT HAVING ELECTRIC CONTROL LEVER Public/Granted day:2010-12-16
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