Leveling system for lift device

Patent metadata

Field	Value
Publication number	US-11591199-B2
Application number	US-202017079014-A
Country	US
Kind code	B2
Filing date	Oct 23, 2020
Priority date	Nov 5, 2018
Publication date	Feb 28, 2023
Grant date	Feb 28, 2023

Abstract

A lift device includes a base, an arm, a tractive element, and a steering actuator. The arm has a base end coupled to the base and a tractive element end. The arm includes a steering actuator interface positioned along an exterior surface of the arm. The tractive element is coupled to the tractive element end. The steering actuator has a first end coupled to the steering actuator interface and an opposing second end coupled to the tractive element. The arm includes a plate extending from the exterior surface of the arm at an upward angle and past the steering actuator.

First claim

The invention claimed is:

1. A lift device comprising:
a base;
an arm having a base end coupled to the base and a tractive element end, the arm including a steering actuator interface positioned along an exterior surface of the arm;
a tractive element coupled to the tractive element end; and
a steering actuator having a first end coupled to the steering actuator interface and an opposing second end coupled to the tractive element;
wherein the arm includes a plate extending from the exterior surface of the arm at an upward angle and past the steering actuator.

2. The lift device of claim 1 , wherein a portion of a bottom surface of the arm is angled, and wherein the plate is continuous with the portion of the bottom surface that is angled.

3. The lift device of claim 1 , wherein the arm has a longitudinal portion with the base end and a lateral portion with the tractive element end, and wherein the lateral portion extends from an end of the longitudinal portion opposite the base end.

4. The lift device of claim 3 , wherein the lateral portion extends perpendicularly from the longitudinal portion.

5. The lift device of claim 3 , wherein the lateral portion extends at an obtuse angle from the longitudinal portion.

6. The lift device of claim 3 , wherein the lateral portion has a first exterior surface facing the base and a second exterior surface facing away from the base.

7. The lift device of claim 6 , wherein the exterior surface is the second exterior surface, wherein the base defines a first interface and a second interface, wherein the arm includes a pivot actuator interface positioned along the first exterior surface of the lateral portion, wherein the base end of the longitudinal portion includes a base interface pivotally coupled to the first interface of the base, further comprising a pivot actuator having a third end coupled to the second interface of the base and an opposing fourth end coupled to the pivot actuator interface of the lateral portion.

8. The lift device of claim 7 , further comprising a pressure sensor assembly including a first mount positioned along the pivot actuator, a second mount positioned along the pivot actuator and spaced from the first mount, and a cover extending along the pivot actuator and coupled to the first mount and the second mount, wherein at least one of the first mount or the second mount is configured to facilitate coupling a pressure sensor to the pivot actuator.

9. The lift device of claim 1 , wherein the arm is a first arm, further comprising a second arm coupled to a side of the base opposite the first arm.

10. The lift device of claim 9 , wherein the first arm and the second arm have a different shape or structure.

11. The lift device of claim 10 , wherein the second arm does not include at least one of a second steering actuator or a second plate.

12. The lift device of claim 9 , wherein the first arm and the second arm are identical in shape and structure.

13. The lift device of claim 1 , further comprising:
a drive actuator pivotally coupled to the tractive element end of the arm by a kingpin; and
a steering sensor positioned atop the kingpin.

14. The lift device of claim 1 , wherein the base (i) defines an interior chamber and an aperture that facilitates passing at least one of hosing or wiring through a wall of the base into the interior chamber and (ii) has a tab positioned proximate the aperture and that extends from the wall, the tab facilitates securing the at least one of the hosing or the wiring thereto using a retainer.

15. The lift device of claim 14 , wherein the tab defines notches at opposing ends thereof that at least partially prevent the retainer from sliding off of the tab.

16. A lift device comprising:
a base;
an arm including:
a first portion with a first end coupled to the base; and
a second portion with a second end, the second portion extending (i) from the first portion opposite the first end and (ii) at least one of (a) perpendicularly from the first portion such that the arm has a L-shaped structure or (b) at an obtuse angle from the first portion;

a tractive element coupled to the second end of the second portion;
a steering actuator coupled to the arm and the tractive element; and
a plate extending from the arm at an upward angle and past the steering actuator.

17. A lift device comprising:
a chassis (i) defining an interior chamber and an aperture that facilitates passing at least one of hosing or wiring through a wall of the chassis into the interior chamber and (ii) having a tab positioned proximate the aperture and that extends from the wall, the tab facilitates securing the at least one of the hosing or the wiring thereto using a retainer; and
a plurality of tractive elements coupled to the chassis.

18. The lift device of claim 17 , further comprising a plurality of arms coupled to the chassis, each of the plurality of arms coupling a respective one of the plurality of tractive elements to the chassis.

Assignees

• Oshkosh Corp

Inventors

• Holmes Jesse
• Marinoiu Constantin B
• Smith Stephen Z
• Hackenberg Eric
• Hao Jihong
• Sivasubramanian Harish
• Amsallen Marcel

Classifications

• B66F17/006

  for working platforms · CPC title

• B60G17/0165

  to an external condition, e.g. rough road surface, side wind · CPC title

• B66F9/07586

  Suspension or mounting of wheels on chassis · CPC title

• B60G2600/21

  Self-controlled or adjusted · CPC title

• B60G2200/132

  with a single trailing arm · CPC title