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Lift truck

  • US 7,165,819 B2
  • Filed: 08/10/2005
  • Issued: 01/23/2007
  • Est. Priority Date: 08/21/2001
  • Status: Expired due to Fees
First Claim
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1. A lift truck comprising:

  • a truck body;

    a traveling motor for traveling the truck body;

    an electromagnetic brake for braking rotation of the traveling motor;

    a brake operation device to be operated for actuation of the electromagnetic brake; and

    ,a brake controller for detecting the brake operation of the brake operation device to actuate the electromagnetic brake,the brake controller comprising;

    an operation sensor for detecting operation of the brake operation device;

    a speed sensor detecting the traveling speed of the truck body;

    a controller for deciding the value of an electric brake force of an electric brake in accordance with the detected value of the speed sensor; and

    a motor drive part for inputting therein the value of the electric brake force to electrically brake the traveling motor,wherein the brake controller, when it detects the brake operation of the brake operation device, actuates the electromagnetic brake, detects the traveling speed of the truck body, and electrically controls the traveling motor in accordance with the decided value such that the electric brake force is increased or decreased in correspondence to the detected traveling speed of the truck body.

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