Rotary cutting deck height of cut adjustment mechanism

Patent metadata

Field	Value
Publication number	US-9301444-B2
Application number	US-201414268608-A
Country	US
Kind code	B2
Filing date	May 2, 2014
Priority date	May 2, 2014
Publication date	Apr 5, 2016
Grant date	Apr 5, 2016

Abstract

A rotary cutting deck height of cut adjustment mechanism includes a front pair of height of cut arms and a rear pair of height of cut arms, each height of cut arm pivotably mounted at an angle to a rotary cutting deck. A height of cut rod extends between a front height of cut arm and a rear height of cut arm on each side of the deck. A height of cut adjustment screw is rotatable to extend or retract each height of cut rod. A linkage is provided between the pair of height of cut adjustment screws, so that the angle of the height of cut arms may be adjusted from a single point.

First claim

The invention claimed is:

1. A rotary cutting deck height of cut adjustment mechanism, comprising:
a front height of cut arm and a rear height of cut arm, each height of cut arm pivotably mounted to a rotary cutting deck at a pivot point at an upper end of each height of cut arm;
a height of cut rod extending between the front height of cut arm and the rear height of cut arm;
a rotatable height of cut adjustment screw that extends or retracts the height of cut rod to change an angle of each height of cut arm relative to the rotary cutting deck; and
a stabilizer bar linking the front height of cut arm at the pivot point with the rear height of cut arm below the pivot point.

2. The rotary cutting deck height of cut adjustment mechanism of claim 1 wherein the height of cut adjustment screw includes a worm that engages a worm gear.

3. The rotary cutting deck height of cut adjustment mechanism of claim 1 further comprising a support pivotably mounted to an upper end of each of the height of cut arms; one of the height of cut rods extending at least partially through each support.

4. A rotary cutting deck height of cut adjustment mechanism, comprising:
a pair of front height of cut arms extending at an angle from a rotary cutting deck and supporting the rotary cutting deck on at least one rotatable ground engaging member;
a pair of rear height of cut arms extending at an angle from the rotary cutting deck and supporting the rotary cutting deck on at least one rotatable ground engaging member;
a support mounted to an upper end of each height of cut arm;
a height of cut rod between the support on each front height of cut arm and each rear height of cut arm;
a height of cut adjustment screw that extends and retracts the rod from at least one of the supports to change the angle of the height of cut arms; and
a stabilizer bar connecting each front height of cut arm at the upper end to each rear height of cut arm below the upper end.

5. The rotary cutting deck height of cut adjustment mechanism of claim 4 wherein the adjustment screw includes a worm that engages a worm gear.

6. The rotary cutting deck height of cut adjustment mechanism of claim 4 further comprising a pair of height of cut adjustment screws and a linkage connected between each adjustment screw.

7. The rotary cutting deck height of cut adjustment mechanism of claim 4 further comprising a threaded rod engaging an internally threaded portion of the height of cut rod.

Assignees

• Deere & Co

Inventors

• Campbell Chad W
• Steen Chad C

Classifications

• A01D34/835

  specially adapted for particular purposes · CPC title

• A01D34/82

  Other details · CPC title

• A01D34/006 Primary

  Control or measuring arrangements · CPC title

• A01D34/74 Primary

  Cutting-height adjustment · CPC title

• A01D34/63

  having cutters rotating about a vertical axis · CPC title