Gauge Arm

Abstract

A gauge arm (and concomitant method of retrofitting an existing gauge arm) comprising an arm portion, a receptacle portion for receiving two or more sealed bearings, and two or more sealed bearings inserted into the receptacle portion. The receptacle portion is smooth bore, with the sealed bearings being press fit into same. The sealed bearings can be of different dimensions, such as one being a gauge wheel and closing wheel bearing, and one a round bore grain drill bearing. The receptacle portion then comprises a stop within the bore thereof.

Claims

1. A method of retrofitting a gauge arm with a threaded receptacle portion, the method comprising the steps of: milling the receptacle portion to make it smooth bore; and inserting at least two sealed bearings into the milled receptacle portion.

2. The method of claim 1 wherein the inserting step comprises press fitting.

3. The method of claim 1 wherein inserting comprises inserting two sealed bearings.

4. The method of claim 1 wherein one of the sealed bearings is a gauge wheel and closing wheel bearing.

5. The method of claim 1 wherein one of the sealed bearings is a round bore grain drill bearing.

6. The method of claim 1 wherein milling comprises milling from both ends of the receptacle portion to form a stop within a bore of the receptacle portion.

7. A method of retrofitting a gauge arm with a threaded receptacle portion, the method comprising the steps of: milling the receptacle portion to make it smooth bore; and inserting a first sealed bearing and a second sealed bearing into the milled receptacle portion by press fitting said first and said second sealed bearings into the milled receptacle portion.

8. The method of claim 7 wherein the first sealed bearing is a gauge wheel bearing and the second sealed bearing is a closing wheel bearing.

9. The method of claim 7 wherein said second sealed bearing is a round bore grain drill bearing.

10. The method of claim 7 wherein the step of milling the receptacle portion comprises milling from both ends of the receptacle portion to form a stop within a bore of the receptacle portion.

11. The method of claim 7 wherein the step of press fitting results in a secure frictional fit whereby no retainers such as snap rings are required to secure the first and second sealed bearings in said receptacle portion.

12. A gauge arm comprising: an arm portion; an unthreaded receptacle portion; a single interior stop within a bore of said receptacle portion, wherein said unthreaded receptacle is adapted for receiving two sealed bearings of differing lengths, one on each side of said single interior stop; a first sealed bearing inserted into said receptacle portion and press fit against a first side of said single interior stop, wherein said first sealed bearing is a double row bearing; and a second sealed bearing inserted into said receptacle portion and press fit against a second side of said single interior stop, wherein said gauge arm is suitable for use in a planter.

13. The gauge arm of claim 12 wherein said receptacle portion is smooth bore.

14. The gauge arm of claim 12 wherein said first sealed bearing and said second sealed bearing are of different dimensions.

15. The gauge arm of claim 12 wherein said first sealed bearing is a gauge wheel and closing wheel bearing.

16. The gauge arm of claim 15 wherein one of said second sealed bearing is a round bore grain drill bearing.

17. The gauge arm of claim 12 wherein the press fitting of said first sealed bearing and said second sealed bearing results in a secure frictional fit whereby no retainers such as snap rings are required to secure the first and second sealed bearings in said receptacle portion.

Description

BRIEF DESCRIPTION OF THE VIEWS OF THE DRAWINGS

[0010] The accompanying drawings, which are incorporated into and form a part of the specification, illustrate one or more embodiments of the present invention and, together with the description, serve to explain the principles of the invention. The drawings are only for the purpose of illustrating one or more preferred embodiments of the invention and are not to be construed as limiting the invention. In the drawings:

[0011] FIGS. 1A and 1B are exploded views of a prior art gauge arm;

[0012] FIG. 2 is an elevation view of an improved gauge arm according to the present invention installed on a planter;

[0013] FIG. 3 is a perspective close up view of a portion of the planter shown in FIG. 2, with components removed for clarity of view, showing an installed improved gauge arm of the present invention;

[0014] FIG. 4 is a back perspective view of an assembled gauge arm of the present invention;

[0015] FIG. 5A is a front perspective view of an assembled gauge arm of the present invention;

[0016] FIG. 5B is an exploded view of the gauge arm shown in FIG. 5A;

[0017] FIG. 6A is a plan view of the gauge arm of the present invention with the sealed bearings removed for clarity of view; and

[0018] FIG. 6B is a cross-sectional view of the gauge arm illustrated in FIG. 6A taken at cut line 6B.

DETAILED DESCRIPTION OF THE INVENTION

[0019] The present invention is of new improved gauge arms, which, as will be readily understood by those skilled in the art, are installed on planter machinery, such as planter 5 in FIGS. 2 and 3. In an exemplary embodiment, the gauge arms include a receptacle portion which is milled to take two or more (preferably two different) sealed bearings, with no threading required or desired. The gauge arms of the invention have sealed bearings so that they do not require greasing and will not in ordinary operation get full of dust or dirt. Furthermore, the bearings stay tight and in adjustment under normal use.

[0020] FIGS. 4-6B show an illustrative gauge arm 10 according to the invention as described herein. In this case the receptacle portion 12 of the gauge arm has been milled to accept two sealed bearings 14 and 16. Arm portion 18 can be of any of a number of shapes, depending on the requirements of the particular machine employing the gauge arm.

[0021] Receptacle portion 12 comprises receptacle 44 for bearing 14, receptacle 42 for bearing 16. Stops 46 are inserted where appropriate against which one end of each bearing will rest upon insertion. Receptacles 42 and 44 are preferably bored for press fit for the accompanying sealed bearings 14 and 16.

[0022] The preferred larger sealed bearing 14 is a gauge wheel and closing wheel bearing, most preferably with bore of about 0.640″, overall length of about 1.725″, length of body about 1.535″, and width about 1.575″, such as John Deere® part number AN212132 (or Timken® part number 5203KYY2). The preferred smaller sealed bearing 16 is a round bore grain drill bearing, most preferably with bore of about 0.64″ round, O.D. of about 1.57″ flat, IR width of about 0.72″, and OR width of about 0.47″, such as John Deere® part number AN281357 (or Timken® part number 203KRR2). Both the Single Row Bearing 203KRR2 and Double Row Bearing 5203KYY2 Type have been field tested for 9 years and proven to stay in place, work freely, and not need adjustment. However, other sealed bearings may be used as needs dictate, and could include two identical bearings.

[0023] The two above bearings are presently preferred for a few reasons. The AN212132 or equivalent bearing is a double row bearing. This type of bearing is very strong and field proven in other farm applications. The AN281357 or equivalent bearing is also field proven in farm applications. So, there are actually three rows of bearings inside the gauge arm that work together. The two different bearings together make a very strong set that can withstand a lot of side pressure while in motion. By using the two different bearings they collectively fill the inside cavity all the way across from one side to the other, making a good and secure fit when placed on the planter machinery such as planter 5. By leaving a stop inside the cavity of the gauge arm, these two different bearings, one on each side of the stop, work well together and cannot come out or move out of adjustment after being installed on the planter machinery. There are no snap rings or retainers necessary. In all, this embodiment of the present invention makes for a well working gauge arm that is nearly trouble free.

[0024] Note that in the specification and claims, “about” or “approximately” means within ten percent (10%) of the numerical amount cited.

[0025] Although the invention has been described in detail with particular reference to these preferred embodiments, other embodiments can achieve the same results. Variations and modifications of the present invention will be obvious to those skilled in the art and it is intended to cover all such modifications and equivalents. The entire disclosures of all references, applications, patents, and publications cited above and/or in the attachments, and of the corresponding application(s), are hereby incorporated by reference.