Articulated boom telehandler

Patent metadata

Field	Value
Publication number	US-10457533-B2
Application number	US-201816119577-A
Country	US
Kind code	B2
Filing date	Aug 31, 2018
Priority date	Sep 1, 2017
Publication date	Oct 29, 2019
Grant date	Oct 29, 2019

Abstract

A telehandler includes a frame assembly, tractive elements, a cabin, a boom assembly, and a locking mechanism selectively reconfigurable between a locked configuration and an unlocked configuration. The boom assembly includes a base boom section having a proximal end pivotably coupled to the frame assembly and a distal end opposite the proximal end, an intermediate boom section pivotably coupled to the distal end of the base boom section, and an upper boom section having a proximal end pivotably coupled to the intermediate boom section and a distal end configured to be coupled to an implement. The boom assembly is configured to move freely when the locking mechanism is in the unlocked configuration. In the locked configuration, the locking mechanism is configured to couple the intermediate boom section to the frame assembly such that the locking mechanism limits rotation of the base boom section relative to the frame assembly.

First claim

The invention claimed is:

1. A telehandler comprising:
a frame assembly;
a plurality of tractive elements rotatably coupled to the frame assembly;
an outrigger coupled to the frame assembly and selectively repositionable between a stored position and a deployed position, wherein in the deployed position the outrigger engages the ground to support a portion of a weight of the telehandler;
a cabin coupled to the frame assembly and configured to house an operator;
a boom assembly comprising:
a lower boom section having a proximal end pivotably coupled to the frame assembly and a distal end opposite the proximal end;
an intermediate boom section pivotably coupled to the distal end of the lower boom section; and
an upper boom section having a proximal end pivotably coupled to the intermediate boom section and a distal end configured to be coupled to an implement;

a locking mechanism selectively reconfigurable between a locked configuration and an unlocked configuration, wherein the boom assembly is configured to move freely when the locking mechanism is in the unlocked configuration, and wherein, in the locked configuration, the locking mechanism is configured to couple the intermediate boom section to the frame assembly such that the locking mechanism limits rotation of the lower boom section relative to the frame assembly; and
a controller operatively coupled to the locking mechanism, wherein the controller is configured to prevent the locking mechanism from changing from the locked configuration to the unlocked configuration in response to at least one of:
a weight of a payload supported by the implement exceeding a first threshold weight;
an orientation of the frame assembly being offset more than a threshold angle from a level orientation;
the outrigger not being in the deployed position; and
the portion of the weight of the telehandler supported by the outrigger being less than a second threshold weight.

2. The telehandler of claim 1 , wherein the lower boom section is configured to rotate relative to the intermediate boom section about a first axis, wherein the upper boom section is configured to rotate relative to the intermediate boom section about a second axis, and wherein the first axis is not aligned with the second axis.

3. The telehandler of claim 2 , wherein the upper boom section includes at least two telescoping boom sections slidably coupled to one another and configured to vary an overall length of the upper boom section.

4. The telehandler of claim 1 , wherein at least one of:
the intermediate boom section defines a first aperture, and the locking mechanism extends into the first aperture when the locking mechanism is in the locked configuration; and
the frame assembly defines a second aperture, and the locking mechanism extends into the second aperture when the locking mechanism is in the locked configuration.

5. The telehandler of claim 4 , wherein the intermediate boom section defines the first aperture, wherein the frame assembly defines the second aperture, and wherein the locking mechanism extends into both the first aperture and the second aperture when the locking mechanism is in the locked configuration.

6. The telehandler of claim 5 , wherein at least one of:
the locking mechanism extends through the first aperture and into the second aperture when the locking mechanism is in the locked configuration; and
the locking mechanism extends through the second aperture and into the first aperture when the locking mechanism is in the locked configuration.

7. The telehandler of claim 1 , wherein the boom assembly has a first capacity when the locking mechanism is in the locked configuration, wherein the boom assembly has a second capacity when the locking mechanism is in the unlocked configuration, and wherein the first capacity is greater than the second capacity.

8. The telehandler of claim 1 , wherein the frame assembly includes a base frame assembly and a turntable rotatably coupled to the base frame assembly, wherein the tractive elements are coupled to the base frame assembly, and wherein the cabin and the proximal end of the lower boom section are coupled to the turntable.

Assignees

• Oshkosh Corp

Inventors

• Puszkiewicz Ignacy
• Indermuhle Michael
• Gilbride Matthew

Classifications

• B66F9/0655 Primary

  with a telescopic boom · CPC title

• B66F9/075

  Constructional features or details · CPC title

• B66F9/07559

  Stabilizing means · CPC title