Drawbar pin ejector

Patent metadata

Field	Value
Publication number	US-9809069-B2
Application number	US-201615296939-A
Country	US
Kind code	B2
Filing date	Oct 18, 2016
Priority date	Nov 4, 2015
Publication date	Nov 7, 2017
Grant date	Nov 7, 2017

Abstract

A drawbar assembly for coupling a drawbar to a tongue of a towed implement includes a drawbar pin and a drawbar clevis having a bore configured to receive the drawbar pin. A locking plate is coupled to the drawbar clevis and movable between a pin-lock condition in which the locking plate is configured to obstruct at least a portion of the bore, and a pin-unlock condition. An ejector mechanism is configured to dislodge the drawbar pin from the bore. The ejector mechanism includes a handle utilized to operate the ejector mechanism and an ejector arm pivotably disposed in an ejector recess in the clevis. The ejector arm is movable from a home position in which the ejector arm does not interfere with the drawbar pin to an eject position in which the ejector arm forces the drawbar pin to be at least partially dislodged out of the bore.

First claim

What is claimed is:

1. A drawbar assembly for coupling a drawbar to a tongue of a towed implement, the drawbar assembly comprising:
a drawbar pin;
a drawbar clevis having a bore configured to receive the drawbar pin;
a locking plate movably coupled to the drawbar clevis, wherein the locking plate is movable between a pin-lock condition wherein the locking plate is configured to obstruct at least a portion of the bore, and a pin-unlock condition;
an upper retaining plate mounted above the locking plate coupling the locking plate to the clevis and assisting in preventing debris from affecting the locking plate; and
an ejector mechanism configured to dislodge the drawbar pin from the bore, the ejector mechanism comprising:
a handle utilized to operate the ejector mechanism, wherein the handle extends through a first slot in the upper retaining plate and an aligning but shorter second slot in the locking plate; and
an ejector arm pivotably disposed in an ejector recess in the clevis, wherein the ejector arm is movable from a home position in which the ejector arm does not interfere with the drawbar pin to an eject position in which the ejector arm forces the drawbar pin to be at least partially dislodged out of the bore in the clevis.

2. The drawbar assembly of claim 1 wherein the locking plate must be slid back into a pin-unlocked position before the ejector arm can be pivoted to the eject position.

3. The drawbar assembly of claim 1 wherein a toe of the ejector arm pushes up on a shoulder of the of the drawbar pin and at least partially dislodges the drawbar pin out of a shoulder recess of the bore.

4. The drawbar assembly of claim 1 wherein the pivot ejector arm is mounted in the ejector recess with a pivot mechanism, the pivot mechanism comprising a pivot rod that extends through a pivot bore in the ejector arm and held by the clevis.

5. The drawbar assembly of claim 1 wherein the handle is pivotably attached to the ejector arm such that initial movement of the handle causes a handle stem to contact the locking plate at an end of the second slot and move the locking plate to the pin-unlock position.

6. The drawbar assembly of claim 1 , wherein the handle is pushed down to pivot the ejector arm to dislodge the drawbar pin.

Assignees

• Agco Corp

Inventors

• Hruska Derek
• Shaw Matthew

Classifications

• B60D1/02

  Bolt or shackle-type couplings · CPC title

• B60D1/025 Primary

  comprising release or locking lever pins · CPC title

• B60D1/28

  for preventing unwanted disengagement, e.g. safety appliances · CPC title