Industrial truck comprising a device for reducing vibrations

Patent metadata

Field	Value
Publication number	US-10870563-B2
Application number	US-201916245361-A
Country	US
Kind code	B2
Filing date	Jan 11, 2019
Priority date	May 2, 2016
Publication date	Dec 22, 2020
Grant date	Dec 22, 2020

Abstract

The invention relates to an industrial truck comprising a mast, a load-carrying apparatus, which can be moved upwards and downwards thereon and which has at least one load-receiving assembly for receiving a load that is to be transported, and a support structure connecting the load-receiving assembly to the mast, the load-receiving assembly having a load-carrying arrangement connected to the support structure, and a device for reducing vibrations, characterised in that the device for reducing vibrations has at least one load support, which covers the load-carrying arrangement at the top at least in regions, on which support a load received by the load-carrying apparatus can be supported and which support is provided so as to be movable to a limited extent on the load-carrying arrangement such that it can perform vibration-reducing movements relative to the load-carrying arrangement.

First claim

The invention claimed is:

1. An industrial truck comprising:
an upright mast;
a load-carrying apparatus capable of being moved upwards and downwards on the upright mast, the load-carrying apparatus having at least one load-receiving means for receiving a load that is to be transported and a support structure connecting the load-receiving means to the upright mast, the load-receiving means having a load-carrying arrangement connected to the support structure; and
a device for reducing vibrations, wherein the device for reducing vibrations has at least one load support, which covers a top region of the load-carrying arrangement, wherein a load received by the load-carrying apparatus can be supported on the at least one load support, wherein the at least one load support is provided so as to be movable to a limited extent on the load-carrying arrangement such that the at least one load support can perform vibration-reducing movements relative to the load-carrying arrangement, wherein the load-carrying arrangement comprises at least one load-carrying arm on which the load support is retained and guided to perform the vibration-reducing movements relative to said load-carrying arm,
wherein the load support is coupled to the load-carrying arrangement by a damping system, which influences the movement of the load support relative to the load-carrying arrangement,
wherein the load-carrying arm has a horizontal portion, on which the load support is retained and guided, and an upright portion, the load support further comprising a stop plate positioned vertically, wherein the damping system further includes a damping cylinder and a spring positioned horizontally between the stop plate and the upright portion of the load-carrying arm, the spring and the damping cylinder simultaneously engaging a rear surface of the stop plate and configured to urge the load support to a target rest position during the vibration-reducing movements of the load support.

2. The industrial truck according to claim 1 , wherein the load-carrying arrangement comprises a load-carrying fork having a pair of load-carrying arms, wherein each particular one of the load-carrying arms carries a respective portion of the load support assigned to the particular one of the load-carrying arms, the portions of the load support being guided on the load-carrying arms so as to be moveable to a limited extent in a longitudinal direction of the load-carrying arms such that the portions of the load support can perform vibration-reducing movements in the longitudinal direction of the load-carrying arms.

3. The industrial truck according to claim 2 , wherein an upper surface and two lateral sides adjacent to the upper surface of each of the load-carrying arms are covered on the outside by the respective portion of the load support that is assigned to the particular one of the load-carrying arms.

4. The industrial truck according to claim 2 , wherein the portions of the load support are supported on rollers which are rotatably mounted on the load-carrying arms such that the portions of the load support can perform vibration-reducing movements relative to the load-carrying arms when the rollers rotate.

5. The industrial truck according to claim 1 , wherein the damping cylinder comprises at least one hydraulic friction-damping cylinder or pneumatic friction-damping cylinder.

6. The industrial truck according to claim 1 , wherein the damping cylinder comprises at least one active component, the active component being at least one controllable hydraulic cylinder, at least one controllable pneumatic cylinder, or at least one controllable electric motor, the active component of the damping system acting between the upright portion of the load-carrying arm and the stop plate of the load support in order to apply pressure to the load support in a vibration-reducing manner.

7. The industrial truck according to claim 1 , wherein the industrial truck is designed as a sideloader, which has a load-carrying fork having the at least one load-carrying arm as the load-carrying arrangement, wherein the at least one load-carrying arm is positioned or capable of being oriented transversely to a straightforward direction of travel of the industrial truck, the load support being capable of performing vibration-reducing movements along the at least one load-carrying arm and therefore transversely to the straightforward direction of travel of the industrial truck.

8. The industrial truck according to claim 7 , wherein the device for reducing vibrations is controllable depending on one or more of: an orientation of the at least one load-carrying arm, a lifted vertical position of the at least one load-carrying arm, a particular operating state of the industrial truck, or the industrial truck being stopped in certain surroundings.

Assignees

• Jungheinrich Ag

Inventors

• Schöttke Carsten
• Magens Ernst-Peter
• Schmalzl Jürgen
• Bibernell Hubert

Classifications

• B66F9/07 Primary

  Floor-to-roof stacking devices, e.g. "stacker cranes", "retrievers" · CPC title

• B66F9/122

  longitudinally movable · CPC title

• B66F9/07559 Primary

  Stabilizing means · CPC title

• B66F9/148

  Whole unit including fork support moves sideways · CPC title