Wear block assembly for a three-point hitch

Patent metadata

Field	Value
Publication number	US-2023067078-A1
Application number	US-202117463198-A
Country	US
Kind code	A1
Filing date	Aug 31, 2021
Priority date	Aug 31, 2021
Publication date	Mar 2, 2023
Grant date	—

Abstract

A wear block assembly for a three-point hitch includes an actuator wedge that moves along a longitudinal axis relative to a lower lift arm of the three-point hitch. The actuator wedge also includes a tapered surface. The wear block assembly also includes a wear block that moves along a lateral axis relative to the lower lift arm and the wear block includes a wear surface that engages a sway block of the three-point hitch. The wear block also includes a contact surface that engages the tapered surface of the actuator wedge. The actuator wedge drives the wear block to move in a first direction along the lateral axis in response to movement of the actuator wedge in a second direction along the longitudinal axis.

First claim

1 . A wear block assembly for a three-point hitch, comprising:
an actuator wedge configured to move along a longitudinal axis relative to a lower lift arm of the three-point hitch, wherein the actuator wedge comprises a tapered surface; and a wear block configured to move along a lateral axis relative to the lower lift arm, wherein the wear block comprises:
a wear surface configured to engage a sway block of the three-point hitch; and
a contact surface configured to engage the tapered surface of the actuator wedge, wherein the actuator wedge is configured to drive the wear block to move in a first direction along the lateral axis in response to movement of the actuator wedge in a second direction along the longitudinal axis.

2 . The wear block assembly of claim 1 , wherein the actuator wedge comprises a slot formed through the tapered surface.

3 . The wear block assembly of claim 2 , wherein the wear block comprises a tab.

4 . The wear block assembly of claim 3 , wherein the tab is configured to be at least partially disposed in the slot of the actuator wedge.

5 . The wear block assembly of claim 4 , wherein the tab prevents rotation of the wear block about the lateral axis relative to the actuator wedge.

6 . The wear block assembly of claim 1 , wherein the contact surface is tapered, and a first slope of the tapered surface is substantially equal to a second slope of the contact surface.

7 . The wear block assembly of claim 1 , wherein a plurality of indicators are formed on the tapered surface.

8 . A wear block assembly for a three-point hitch, comprising:
an actuator wedge configured to move along a longitudinal axis relative to a lower lift arm of the three-point hitch, the actuator wedge comprising a slot formed through a first surface of the actuator wedge; and a wear block configured to move along a lateral axis relative to the lower lift arm, the wear block comprising a tab extending away from a first surface of the wear block, wherein the slot is configured to receive a portion of the tab to couple the wear block and the actuator wedge, and wherein movement of the actuator wedge in the first direction is configured to move the wear block in the second direction.

9 . The wear block assembly of claim 8 , wherein the wear block is formed of a ductile iron material.

10 . The wear block assembly of claim 8 , wherein the actuator wedge comprises a plurality of grooves formed on the first surface of the actuator wedge.

11 . The wear block assembly of claim 8 , wherein the first surface of the actuator wedge is tapered.

12 . The wear block assembly of claim 8 , wherein the wear block comprises at least one aperture formed therethrough, wherein the at least one aperture is configured to receive a fastener to couple the wear block to the lower lift arm.

13 . The wear block assembly of claim 8 , comprising one or more fasteners configured to couple the wear block to the lower lift arm.

14 . A wear block assembly for a three-point hitch, comprising:
an actuator wedge configured to move along a longitudinal axis relative to a lower lift arm of the three-point hitch; and a wear block configured to move along a lateral axis relative to the lower lift arm, wherein the actuator wedge is configured to drive the wear block to move in a first direction along the lateral axis in response to movement of the actuator wedge in a second direction along the longitudinal axis.

15 . The wear block assembly of claim 14 , wherein the wear block is formed of a ductile iron material.

16 . The wear block assembly of claim 14 , comprising at least one fastener configured to removably couple the wear block to the lower lift arm.

17 . The wear block assembly of claim 16 , wherein the at least one fastener is configured to removably couple the actuator wedge to the lower lift arm.

18 . The wear block assembly of claim 16 , wherein the wear block is configured to be partially disposed within a recess of the lower lift arm.

19 . The wear block assembly of claim 18 , wherein the actuator wedge is configured to be at least partially disposed within the recess of the lower lift arm.

20 . The wear block assembly of claim 19 , wherein the actuator wedge is configured to move along the longitudinal axis within the recess of the lower lift arm.

Assignees

• Cnh Ind America Llc

Inventors

• Sietsema Chad
• Rasset John T
• Curley Thomas Michael

Classifications

• A01B59/041 Primary

  preventing or limiting side-play of implements (preventing overstrain A01B61/00) · CPC title

• A01B59/066

  of the type comprising at least two lower arms and one upper arm generally arranged in a triangle, e.g. three-point hitches · CPC title

• A01B59/002 Primary

  Details, component parts · CPC title