Link assembly

Patent metadata

Field	Value
Publication number	US-9788471-B2
Application number	US-201414580427-A
Country	US
Kind code	B2
Filing date	Dec 23, 2014
Priority date	Dec 23, 2014
Publication date	Oct 17, 2017
Grant date	Oct 17, 2017

Abstract

A link assembly for a hitch includes a first link and a second link. The second link has first and second spaced apart bores extending therethrough. A coupling member is attached to an end of the first link. The coupling member includes first and second spaced apart coupling plates. The coupling member has a load bore extending through the first and second coupling plates and has a plurality of index bores extending through the first and second coupling plates. A load pin is receivable by the load bore and the first bore, and pivotally couples the second link to the first link. An index pin is removably receivable by the second bore and a selected index bore, and the index pin is movable independently of the load pin.

First claim

What is claimed is:

1. A link assembly for a hitch, the link assembly comprising:
a first link including a longitudinal axis;
a second link, the second link having a first bore extending therethrough, and having a second bore extending therethrough and spaced apart from the first bore;
a coupling member attached to an end of the first link, the coupling member having a pair of coaxially aligned load bores aligned along the longitudinal axis of the first link and a plurality of pairs of coaxially aligned index bores, the plurality of pairs of coaxially aligned index bores being spaced apart from each other and spaced radially outwardly from the pair of coaxially aligned load bores, wherein one of the pairs of coaxially aligned index bores has a fixed location along the longitudinal axis of the first link, and another of the pairs of coaxially aligned index bores has a fixed location offset from the longitudinal axis of the first link;
a load pin receivable by the pair of coaxially aligned load bores and the first bore and pivotally coupling the second link to the first link; and
an index pin which is receivable by the second bore and each of a selected one of the plurality of pairs of coaxially aligned index bores, the index pin being movable independently of the load pin, wherein the location of each of the pairs of coaxially aligned index bores remains fixed with respect to the longitudinal axis.

2. The link assembly of claim 1 , wherein:
the first link is adapted to be coupled to a draft link of the hitch; and
the second link is adapted to be coupled to a lift arm of the hitch.

3. The link assembly of claim 1 , wherein the coupling member further comprises:
a base;
a first coupling plate attached to the base; and
a second coupling plate attached to the base, the second coupling plate being spaced apart from the first coupling plate, the pair of coaxially aligned load bores and the plurality of pairs of coaxially aligned index bores extending through the first and second coupling plates.

4. The link assembly of claim 3 , wherein:
an end of the second link is received between the first and second coupling plates.

5. The link assembly of claim 1 , wherein the coupling member further comprises:
a first coupling plate; and
a second coupling plate spaced apart from the first coupling plate, the pair of coaxially aligned load bores and the plurality of pairs of coaxially aligned index bores extending through the first and second coupling plates.

6. The link assembly of claim 1 , wherein:
the load pin remains inserted in the pair of coaxially aligned load bores and the first bore as the first and second links are rotated with respect to each other.

7. A link assembly for a hitch, the link assembly comprising:
a first link;
a second link, the second link having a first bore extending therethrough, and having a second bore extending therethrough and spaced apart from the first bore;
a coupling member attached to an end of the first link, the coupling member comprising a base, a first coupling plate attached to the base, and a second coupling plate attached to the base, the second coupling plate being spaced apart from the first coupling plate, the coupling member having a load bore extending through the first and second coupling plates and having an a plurality of pairs of coaxially aligned index bores extending through the first and second coupling plates, wherein one of the pairs of coaxially aligned index bores has a fixed location along the longitudinal axis of the first link, and another of the pairs of coaxially aligned index bores has a fixed location offset from the longitudinal axis of the first link;
a load pin receivable by the load bore and the first bore and pivotally coupling the second link to the first link; and
an index pin which is removably receivable by the second bore and each of the plurality of pairs of coaxially aligned index bores, the index pin being movable independently of the load pin, wherein the location of each of the pairs of coaxially aligned index bores remains fixed with respect to the longitudinal axis.

8. The link assembly of claim 7 , wherein:
each of the plurality of pairs of coaxially aligned index bores is spaced apart from the load bore.

9. The link assembly of claim 7 , wherein:
the plurality of pairs of coaxially aligned index bores are spaced radially outwardly from the load bore.

10. The link assembly of claim 7 , wherein:
the first link is adapted to be coupled to a draft link of the hitch; and
the second link is adapted to be coupled to a lift arm of the hitch.

11. A link assembly for a hitch, the link assembly comprising:
a first link;
a second link, the second link having a first bore extending therethrough, and having a second bore extending therethrough and spaced apart from the first bore;
a coupling member attached to an end of the first link, the coupling member comprising a first coupling plate, and a second coupling plate spaced apart from the first coupling plate, the coupling member having a load bore extending through the first and second coupling plates and having a plurality of pairs of coaxially aligned index bores extending through the first and second coupling plates, wherein one of the pairs of coaxially aligned index bores has a fixed location along the longitudinal axis of the first link, and another of the pairs of coaxially aligned index bores has a fixed location offset from the longitudinal axis of the first link;
a load pin receivable by the load bore and the first bore and pivotally coupling the second link to the first link; and
an index pin which is removably receivable by the second bore and each of the plurality of pairs of coaxially aligned index bores, the index pin being movable independently of the load pin, wherein the location of each of the pairs of coaxially aligned index bores remains fixed with respect to the longitudinal axis.

12. The link assembly of claim 11 , wherein:
each of the plurality of pairs of coaxially aligned index bores is spaced apart from the load bore.

13. The link assembly of claim 11 , wherein:
the plurality of pairs of coaxially aligned index bores are spaced radially outwardly from the load bore.

14. The link assembly of claim 11 , wherein:
the first link is adapted to be coupled to a draft link of the hitch; and
the second link is adapted to be coupled to a lift arm of the hitch.

15. The link assembly of claim 11 , wherein:
the load pin has a first diameter and the index pin has a second diameter smaller than the first diameter.

16. The link assembly of claim 11 , wherein:
the coupling member further comprises a base attached to an end of the first link, the first and second coupling plates projecting from the base.

Assignees

• Deere & Co

Inventors

• Buttjer Jeffrey A

Classifications

• A01B59/068 Primary

  the lower arms being lifted or lowered by power actuator means provided externally on the tractor · CPC title

• A01B59/004

  Length-adjustable links · CPC title