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Industrial truck having a control unit for regulating the movement of a hydraulic cylinder, and method for controlling the same

A technology for controlling units and trucks, which is applied to fluid pressure actuating devices, hoisting devices, servo motors, etc., and can solve the problems of inaccurate speed adjustment of hydraulic systems, deviations between the actual movement speed of the load and the expected movement speed, etc.

Pending Publication Date: 2018-06-29
JUNGHEINRICH AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this speed regulation of the hydraulic system is often not precise enough
Therefore, due to different external influences, there may be deviations between the actual movement speed of the load and the expected movement speed

Method used

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  • Industrial truck having a control unit for regulating the movement of a hydraulic cylinder, and method for controlling the same
  • Industrial truck having a control unit for regulating the movement of a hydraulic cylinder, and method for controlling the same
  • Industrial truck having a control unit for regulating the movement of a hydraulic cylinder, and method for controlling the same

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Experimental program
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Embodiment Construction

[0019] figure 1 A design of the truck 10 according to the invention is shown. The lifting frame 12 with the load-bearing part 14 is visible, as well as the hydraulic system 20 and the control unit 40 . exist figure 1 The hydraulic system 20 shown in includes a tilt cylinder 22b as a hydraulic cylinder. In order to measure the velocity or acceleration of the piston rod of the tilt cylinder 22b, said tilt cylinder 22b has figure 2 The sensor shown in. The entire lifting frame 12 can be tilted in the direction of movement marked with B by means of the tilting cylinders 22b. Furthermore, the truck can have one or more lifting cylinders for raising and lowering the lifting frame 12 or the load-bearing part 14 in the direction of movement marked with A. FIG. The truck can also have one or more push cylinders for moving the lifting frame 12 or the load-bearing part 14 in the direction of movement marked C. In addition, in figure 1 A deformation sensor for detecting the bendin...

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Abstract

An industrial truck comprises a lift frame having a load part for carrying a load and a hydraulic system including at least one hydraulic cylinder having a piston rod disposed within a cylindrical housing, and a hydraulic power unit. At least one sensor is configured to determine at least one of: (i) an actual speed of the piston rod of the at least one hydraulic cylinder, and (ii) an actual acceleration of the piston rod of the at least one hydraulic cylinder. Furthermore, a control unit is configured to: (i) receive at least one of a target speed of the piston rod and a target acceleration of the piston rod, (ii) determine at least one of a speed control deviation value from the target speed, and an acceleration control deviation value from the target acceleration, and, (iii) regulate atleast one of the actual speed of the piston rod based on the actual speed control deviation value and the actual acceleration of the piston rod based on the actual acceleration control deviation value.

Description

technical field [0001] The invention relates to a truck with a control unit for regulating a movement of a piston rod of at least one hydraulic cylinder and a method for regulating the movement of a piston rod of at least one hydraulic cylinder of a truck. Background technique [0002] Known trucks generally have a vehicle frame, a lifting frame and a drive for moving the lifting frame relative to the vehicle frame. Via this drive, for example, a lifting device of a truck can be actuated and thus lift a load on the load-bearing part of the lifting frame. The load-bearing part or the entire lifting frame can also be moved on a horizontal axis relative to the vehicle frame by means of a push device. Tilting devices are also known for tilting the load-bearing part or the entire lifting frame relative to the vehicle frame. The lifting, moving and tilting of the lifting frame or load-bearing part is usually realized by retracting or extending hydraulic cylinders. [0003] The ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B66F9/22
CPCB66F9/22B66F9/24F15B2211/3144F15B2211/327F15B2211/6336F15B2211/6651F15B2211/6656B66F9/07B66F9/082B66F9/122B66F9/205F15B11/04F15B15/22
Inventor J·莱希尼茨S·沙尔夫F·门肯
Owner JUNGHEINRICH AG
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