Construction machine

• US 10,465,719 B2
• Filed: 10/30/2015
• Issued: 11/05/2019
• Est. Priority Date: 12/19/2014
• 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: Nomura, Takuya, Takishita, Tatsuo, Yunoue, Masayuki, Nakamura, Yuta, Sakisaka, Keisuke
• Primary Examiner(s): Shaw, Brian F
• Application Number:
  US15/508,174
• Publication Number:
  US 20170284426A1
• Time in Patent Office: 1,467 Days
• 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: B60R 25/245 where the antenna reception area plays a role
• CPC Class Codes: E02F 9/003 Devices for transporting the soil-shifting machines or excavators, e.g. by pushing them or by hitching them to a tractor
• CPC Class Codes: E02F 9/125 Locking devices
• CPC Class Codes: E02F 9/2004 Control mechanisms, e.g. control levers control levers per se G05G
• CPC Class Codes: E02F 9/2058 Electric or electro-mechanical or mechanical control devices of vehicle sub-units for vehicles in general B60W
• CPC Class Codes: E02F 9/2271 Actuators and supports therefor and protection therefor
• CPC Class Codes: E02F 9/24 Safety devices , e.g. for preventing overload E02F9/226 takes precedence
• CPC Class Codes: F02D 29/04 peculiar to engines driving pumps
• CPC Class Codes: F15B 13/01 Locking-valves or other detent i.e. load-holding devices
• CPC Class Codes: F15B 2211/20523 Internal combustion engine

Abstract

A hydraulic excavator (1) includes a wireless authentication device (52) performing wireless authentication with a portable key device (51) and a vehicle body controller (48) for starting an engine (15) based on authentication by the wireless authentication device (52) and an operation of a start switch (12). The wireless authentication device (52) 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 (51) based on the transmitted request signal. The vehicle body controller (48) prohibits driving of a hydraulic actuator (5E, 5F, 5G, 5H, 2E, 2F, 3A) when the portable key device (51) is outside of the authenticable range even if a gate lock lever (13) has been switched to an unlock position.

Claims

1. A construction machine comprising:

a vehicle body having an operator'"'"'s seat;

a prime mover, which is provided on said vehicle body and becomes a power source;

a hydraulic pump driven by said prime mover and supplying a pressurized oil;

a hydraulic actuator driven by the pressurized oil supplied from said hydraulic pump;

a lock device capable of switching between a lock position prohibiting the driving of said hydraulic actuator and an unlock position allowing the driving of said hydraulic actuator;

a start switch for starting said prime mover;

a wireless authentication device provided on said vehicle body and performing wireless authentication with a portable key device; and

a vehicle body controller provided for starting said prime mover based on an operation of said start switch and authentication by said wireless authentication device, wherein;

during driving of said prime mover, in the state of said lock device being switched to the unlock position, and in the case where said portable key device is within an authenticable range of said wireless authentication device, said vehicle body controller allows driving of said hydraulic actuator; and

during driving of said prime mover, in the state of said lock device being switched to the unlock position, and in the case where said portable key device is outside of the authenticable range of said wireless authentication device, said vehicle body controller prohibits driving of said hydraulic actuator while keeping said prime mover driven.

2. The construction machine according to claim 1, wherein

said vehicle body comprises an automotive lower traveling structure and an upper revolving structure rotatably mounted on said lower traveling structure and having a housing covering an upper side of said operator'"'"'s seat;

and

the authenticable range of said wireless authentication device has a range in a vertical direction as a range from a lower end of said upper revolving structure and above and to an upper end of said housing and below, a range in a left-right direction as a range of an overall width of said lower traveling structure, and a range in a front-rear direction as a range of an overall length of said lower traveling structure.

3. The construction machine according to claim 1, wherein

said vehicle body comprises an automotive lower traveling structure and an upper revolving structure rotatably mounted on the lower traveling structure;

and

the authenticable range of said wireless authentication device is set to a revolving range of said upper revolving structure.

4. The construction machine according to claim 1, wherein

said vehicle body comprises an automotive lower traveling structure and an upper revolving structure rotatably mounted on the lower traveling structure and having a housing covering an upper side of said operator'"'"'s seat;

a minimum range of an authenticable range of said wireless authentication device is a range of an operator'"'"'s room of said housing; and

a maximum range of the authenticable range of said wireless authentication device has a range in a vertical direction as a range from a lower end of said upper revolving structure and above to an upper end of said housing and below, a range in a left-right direction as a range of an overall width of said lower traveling structure, and a range in a front-rear direction as a range of an overall length of said lower traveling structure.

5. The construction machine according to claim 1, further comprising:

a range setting unit for variably setting an authenticable range of said wireless authentication device to a basic range and an extended range wider than the basic range, wherein

said vehicle body comprises an automotive lower traveling structure and an upper revolving structure rotatably mounted on the lower traveling structure and on which a working mechanism is mounted;

said basic range has a range in a vertical direction as a range from a lower end of said upper revolving structure and above, a range in a left-right direction as a range of an overall width of said lower traveling structure, and a range in a front-rear direction as a range of an overall length of said lower traveling structure; and

said extended range is a range accommodating all of said lower traveling structure, said upper revolving structure, and said working mechanism.

6. The construction machine according to claim 1, wherein

said lock device includes a gate lock lever which is at a lock position where driving of said hydraulic actuator is prohibited at a raised position and at an unlock position where the driving of said hydraulic actuator is allowed at a lowered position.