Dynamic Vibration Control Systems and Methods for Industrial Lift Trucks
First Claim
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1. A lift truck having vibration control, the lift truck comprising:
- a tractor unit;
vertically movable forks mounted relative to the tractor unit, the forks being vertically movable between an upper position and a lower position;
a vertical support mounted relative to the tractor unit, and a platform mounted relative to the vertical support, the platform for mounting electrical components; and
the vertical support comprising a hollow tube at least partially filled with a vibration damping material to damper vibrations from reaching the platform.
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Abstract
A lift truck includes systems and methods for improved vibration control. Vibration control features reduce or eliminate motion of the truck in one or more of the X-axis, Y-axis, and Z-axis. Some embodiments may include, alone or in combination with the vibration control, stability control to further stabilize the motion of the truck.
13 Citations
24 Claims
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1. A lift truck having vibration control, the lift truck comprising:
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a tractor unit; vertically movable forks mounted relative to the tractor unit, the forks being vertically movable between an upper position and a lower position; a vertical support mounted relative to the tractor unit, and a platform mounted relative to the vertical support, the platform for mounting electrical components; and the vertical support comprising a hollow tube at least partially filled with a vibration damping material to damper vibrations from reaching the platform. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A lift truck having vibration control, the lift truck comprising:
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a tractor unit; vertically movable forks mounted relative to the tractor unit, the forks being vertically movable between an upper position and a lower position; a vertical support mounted relative to the tractor unit, and a platform mounted relative to the vertical support, the platform for mounting electrical components; the vertical support comprising two or more cylinders that function as a mass-damper system to damper vibrations from reaching the platform, the mass-damper system include a spring, a fluid, and a variable valve; and control circuitry coupled to the variable valve, the control circuitry to control a flow of the fluid through the variable valve to control a degree of vibration damping. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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22. A method of reducing vibrations on a lift truck, the method comprising:
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providing a lift truck, the lift truck comprising; a tractor unit; and vertically movable forks mounted relative to the tractor unit, the forks being vertically movable between an upper position and a lower position; providing a vertical support mounted relative to the tractor unit; providing a platform mounted relative to the vertical support, the platform for mounting electrical components; damping vibrations from reaching the platform with at least one of a vibration damping material in the vertical support and a mass-damper system; and providing control circuitry coupled to the at least one of the vibration damping material and the mass-damper system to control a degree of vibration damping. - View Dependent Claims (23, 24)
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Specification