Construction machine

Patent metadata

Field	Value
Publication number	US-9975522-B2
Application number	US-201515508167-A
Country	US
Kind code	B2
Filing date	Oct 29, 2015
Priority date	Dec 12, 2014
Publication date	May 22, 2018
Grant date	May 22, 2018

Abstract

A hydraulic excavator ( 1 ) includes a wireless authentication device ( 42 ) performing wireless authentication with a portable key device ( 41 ) and a vehicle body controller ( 39 ) allowing or prohibiting start of the engine ( 15 ) on the basis of authentication by the wireless authentication device ( 42 ) and an operation of a power switch ( 12 ). The wireless authentication device ( 42 ) transmits a request signal within an authenticable range and performs authentication when it receives an ID code for authentication replied from the portable key device ( 41 ) on the basis of the transmitted request signal. The vehicle body controller ( 39 ) allows start of the engine ( 15 ) by the power switch ( 12 ) when a gate lock lever ( 13 ) is switched to a lock position and the wireless authentication device ( 42 ) performs authentication by the portable key device ( 41 ).

First claim

The invention claimed is:

1. A hydraulic excavator comprising:
a vehicle body having an operator's seat;
an engine provided on said vehicle body and serving as a power source;
a hydraulic pump driven by said engine and supplying a pressurized oil;
a hydraulic actuator driven by the pressurized oil supplied from said hydraulic pump;
a gate lock lever provided at a position corresponding to an entrance way of said operator's seat and switched between a raised position where said entrance way is opened and driving of said hydraulic actuator is prohibited and a lowered position where said entrance way is closed and the driving of said hydraulic actuator is allowed;
a gate lock switch provided on said gate lock lever and detecting a position of said gate lock lever;
a power switch operated at the time of starting said engine;
a wireless authentication device constituted to transmit an authentication request signal within an authenticable range and, when an authentication signal replied from a portable key device is received on the basis of the transmitted authentication request signal, to perform authentication on whether the authentication signal is valid or not;
a vehicle body controller allowing or prohibiting start of said engine on the basis of an operation of said power switch and authentication by said wireless authentication device;
a time setting switch connected to said vehicle body controller, and variably setting authentication holding time by said wireless authentication device;
a range setting switch connected to said vehicle body controller, and variably setting an authenticable range where said wireless authentication device is capable of performing authentication of said portable key device depending on a use environment; and
a monitor device on which a setting screen of said authentication holding time is displayed when said authentication holding time is to be increased/decreased by using said time setting switch are provided; wherein
said vehicle body controller has a unit for allowing start of said engine by said power switch when a detection signal of said raised position is input from said gate lock switch and a signal of valid authentication indicating that said authentication signal of said portable key device is valid is input from said wireless authentication device;
said wireless authentication device is constituted to have an authentication controller for holding a state of said valid authentication for said authentication holding time set by said time setting switch when the valid authentication signal is received from said portable key device; and
said time setting switch is made to set said authentication holding time as a predetermined basic time and variably set a rental allowable time or a lease allowable time longer than the basis time.

Assignees

• Hitachi Construction Machinery Tierra Co Ltd

Inventors

• Nakamura Yuta
• Takishita Tatsuo
• Yunoue Masayuki
• Nomura Takuya
• SAKISAKA Keisuke

Classifications

• E02F9/2062

  Control of propulsion units (for control of the prime mover depending on the load in a hydraulic or pneumatic drive E02F9/2246) · CPC title

• B60R2325/308

  Industrial vehicles · CPC title

• E02F3/964

  of several tools mounted on one machine (E02F3/962 takes precedence) · CPC title

• F02N11/08

  Circuits specially adapted for starting of engines · CPC title

• E02F3/32

  working downwardly and towards the machine, e.g. with backhoes · CPC title