Construction machine

• US 9,975,522 B2
• Filed: 10/29/2015
• Issued: 05/22/2018
• Est. Priority Date: 12/12/2014
• Status: Active Grant

• Current Assignee: Hitachi Construction Machinery Tierra Co.,Ltd. (Hitachi Construction Machinery (China) Co., Ltd.)
• Original Assignee: Hitachi Construction Machinery Tierra Co.,Ltd. (Hitachi Construction Machinery (China) Co., Ltd.)
• Inventors: Nakamura, Yuta, Takishita, Tatsuo, Yunoue, Masayuki, Nomura, Takuya, Sakisaka, Keisuke
• Primary Examiner(s): Wong, K.
• Application Number:
  US15/508,167
• Publication Number:
  US 20170282857A1
• Time in Patent Office: 936 Days
• Field of Search: None
• CPC Class Codes: B60R 2325/308 Industrial vehicles
• CPC Class Codes: B60R 25/24 using electronic identifiers containing a code not memorised by the user
• CPC Class Codes: E02F 3/32 working downwardly and towards the machine, e.g. with backhoes
• CPC Class Codes: E02F 3/325 Backhoes of the miniature type
• CPC Class Codes: E02F 3/964 of several tools mounted on one machine E02F3/962 takes precedence
• CPC Class Codes: E02F 9/2062 Control of propulsion units for control of the prime mover depending on the load in a hydraulic or pneumatic drive E02F9/2246
• CPC Class Codes: E02F 9/24 Safety devices , e.g. for preventing overload E02F9/226 takes precedence
• CPC Class Codes: E02F 9/265 with follow-up actions (e.g. control signals sent to actuate the work tool)
• CPC Class Codes: E05B 49/00 Electric permutation locks; Circuits therefor ; Mechanical aspects of electronic locks; Mechanical keys therefor arrangements for sensing or reading record carriers G06K7/00; mechanisms including electronic locks actuated by nonmechanical keys such as passive and active electrical keys and other data carriers G07C9/00, G07F7/00; electronic switching H03K17/00
• CPC Class Codes: F02D 29/04 peculiar to engines driving pumps
• CPC Class Codes: F02D 29/06 peculiar to engines driving electric generators
• CPC Class Codes: F02N 11/08 Circuits or control means specially adapted for starting of engines
• CPC Class Codes: H04L 9/32 including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials

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).

Claims

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.