Industrial truck comprising a device for reducing vibrations

Patent metadata

Field	Value
Publication number	US-10329131-B2
Application number	US-201715592236-A
Country	US
Kind code	B2
Filing date	May 11, 2017
Priority date	May 12, 2016
Publication date	Jun 25, 2019
Grant date	Jun 25, 2019

Abstract

Industrial truck, in particular a tri-lateral sideloader, comprising
a chassis ( 6 ),
a mast ( 8 ) arranged on the chassis ( 6 ),
a cab ( 12 ),
a support structure ( 9 ) supporting the cab ( 12 ), which can be moved up and down on the mast ( 8 ) together with the cab ( 12 ) and has at least one cantilever arrangement ( 24; 124 ) projecting from the mast ( 8 ), which arrangement extends underneath the cab ( 12 ) and supports a load-carrying assembly ( 36 ) arranged in front of the cab ( 12 ),

and a device for reducing vibrations having vibration components transverse to the main direction of travel (G) of the industrial truck, which device allows vibration-reducing movements of the load-carrying assembly ( 36 ) relative to the mast ( 8 ),

characterized in that

the cantilever arrangement ( 24; 124 ) has a division, having a first cantilever portion ( 50 a; 150 a ), which is coupled to the mast ( 8 ) and guided thereon in a height-adjustable manner, as a first part, and having a second cantilever portion ( 50 b; 150 b ), which supports the load-carrying assembly ( 36 ) and is connected to the first cantilever portion ( 50 a; 150 a ), as the other part, such that, together with the load-carrying assembly ( 36 ), it can perform vibration-reducing movements relative to said first cantilever portion, in particular having movement components transverse to the main direction of travel (G) of the industrial truck.

First claim

The invention claimed is:

1. An industrial truck, comprising:
a chassis,
a mast arranged on the chassis,
a cab,
a load-carrying assembly,
a support structure that supports the cab and is configured to be moved up and down on the mast together with the cab and has at least one cantilever arrangement projecting from the mast, which arrangement extends underneath the cab and supports the load-carrying assembly arranged in front of the cab,
and a device for reducing vibrations, the vibrations having vibration components transverse to a main direction of travel of the industrial truck, which device allows for vibration-reducing movements of the load-carrying assembly relative to the mast,
wherein the cantilever arrangement has a division, having a first cantilever portion, which is coupled to the mast and guided thereon in a height-adjustable manner, as a first part, and having a second cantilever portion, which supports the load-carrying assembly and is connected to the first cantilever portion, as a second part, such that, together with the load-carrying assembly, said second cantilever portion is configured to perform vibration-reducing movements relative to said first cantilever portion.

2. The industrial truck according to claim 1 , wherein the first cantilever portion is guided on the mast in a height-adjustable manner so as not to have a horizontal degree of movement freedom, relative to said mast, which is transverse to the main direction of travel of the industrial truck.

3. The industrial truck according to claim 1 , wherein the cab is supported on the first cantilever portion and is substantially rigidly connected thereto such that the cab does not directly participate in vibration-reducing movements of the second cantilever portion.

4. The industrial truck according to claim 1 , wherein the cab is supported on the second cantilever portion such that the cab, together with the second cantilever portion, is configured to perform vibration-reducing movements relative to the first cantilever portion.

5. The industrial truck according to claim 1 , wherein the load-carrying assembly comprises a lateral push frame connected to the second cantilever portion for combined movement therewith, a lateral push device which is mounted on the lateral push frame so as to be laterally movable thereon, transversely to the main direction of travel of the industrial truck, and a load-carrying apparatus arranged on the lateral push device which apparatus, together with the lateral push device, is laterally movable transversely to the main direction of travel of the industrial truck by means of a controllable lateral push drive device.

6. The industrial truck according to claim 1 , wherein the cantilever arrangement is at least in portions and approximately horizontally such that at least a large part of a length of the first cantilever portion extends underneath the second cantilever portion, supporting it from below, the second cantilever portion being movably mounted on the first cantilever portion by means of a bearing arrangement.

7. The industrial truck according to claim 1 , wherein the division of the cantilever arrangement is designed such that the second cantilever portion is arranged in front of the first cantilever portion such that a dividing line between the first cantilever portion and the second cantilever portion extends from above to below, the second cantilever portion being movably mounted on the first cantilever portion by means of a bearing arrangement which is configured to absorb tensile forces as well as compressive forces and shear forces between the first cantilever portion and the second cantilever portion.

8. The industrial truck according to claim 1 , wherein the second cantilever portion is coupled to a first load-carrying portion by at least one of a passive damping system or an active damping system which influences a movement of the second cantilever portion relative to the first cantilever portion.

9. The industrial truck according to claim 8 , wherein the passive damping system or the active damping system comprises a friction-damping arrangement.

10. The industrial truck according to claim 9 , wherein the friction-damping arrangement comprises at least one of a hydraulic friction-damping cylinder, a pneumatic friction-damping cylinder, or an electromagnetic friction-damping unit.

11. The industrial truck according to claim 8 , wherein the passive damping system or the active damping system comprises a spring arrangement.

12. The industrial truck according to claim 8 , wherein the passive damping system or the active damping system comprises at least one active component, the active component of the passive damping system or the active damping system acting between the second cantilever portion and the first cantilever portion in order to apply pressure to the second cantilever portion so as to reduce vibrations.

13. The industrial truck according to claim 1 , wherein the device for reducing vibrations is selectively activatable and deactivatable.

14. The industrial truck according to claim 13 , wherein the device for reducing vibrations is automatically activatable and deactivatable depending on an operating state of the industrial truck in each case.

15. The industrial truck according to claim 1 , wherein said industrial truck is designed as a sideloader, the load-carrying assembly of which comprises a load-carrying fork, which has load-carrying arms, as a load-carrying element, which arms are positioned or are configured to be oriented transversely to a straightforward direction of travel of the industrial truck, the device for reducing vibrations being controllable depending on at least one of: an orientation of the load-carrying arms, a lifted vertical position of the load-carrying arms, or where the industrial truck has stopped and surroundings thereof.

16. The industrial truck according to claim 1 , wherein the load-carrying assembly comprises an additional mast and a load-carrying element, the load-carrying element being configured to be movable vertically on the additional mast.

Assignees

• Jungheinrich Ag

Inventors

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

Classifications

• B66F9/0759 Primary

  Details of operating station, e.g. seats, levers, operator platforms, cabin suspension · CPC title

• B66F9/075

  Constructional features or details · CPC title

• B66F9/06

  movable, with their loads, on wheels or the like, e.g. fork-lift trucks (vehicle aspects B60 - B62; vehicles predominantly for transporting loads and modified to facilitate loading or unloading B60P1/00; low-lift hand trucks for transporting goods B62B3/06) · CPC title

• B66F17/003

  for fork-lift trucks · CPC title

• B66F9/147

  Whole unit including fork support moves relative to mast · CPC title