AU676503B2

AU676503B2 - Cultivator tyne assembly

Info

Publication number: AU676503B2
Application number: AU51962/93A
Authority: AU
Inventors: Errol Keith Koschitzke
Original assignee: LEMMING INVESTMENTS Pty Ltd
Current assignee: LEMMING INVESTMENTS Pty Ltd
Priority date: 1992-11-26
Filing date: 1993-11-26
Publication date: 1997-03-13
Anticipated expiration: 2013-11-26
Also published as: AU5196293A

Description

42432 GEH:MH P/00/011 Regulation 3.2

AUSTRALIA

Patents Act 1990 COMPLETE SPECIFICATION FOR A STANDARD PATENT

ORIGINAL

Name of Applicant: LEMMING INVESTMENTS PTY LTD Name of inventor: ERROL KEITH KOSCHITZKE Address for Service: o COLLISON CO.,117 King William Street, Adelaide, S.A. 5000 e* Invention Title: CULTIVATOR TYNE ASSEMBLY Details of Associated Provisional Applications: PK6047 dated 26th November 1992 The following statement is a full description of this invention, including the best method of performing it known to us: I II This invention relates generally to cultivating or tillage implements, and more particularly to the tyne assembly of such implements.

BACKGROUND OF THE INVENTION It is known with many cultivating implements to provide a stump jump or trip mechanism for the tyne assembly. These usually have some form of spring loading to resist the draft force and when the share or earth working tool encounters an obstruction, the spring compresses to allow the tyne to pivot to pass over the obstruction.

Australian Patent Specification No. 90999/82 discloses a spring trip standard 1 0 assembly having a curved tyne pivoted to a bracket attached to a beam of the S° implement. The tyne at its upper end is virtually horizontal and has at the upper portion an upstanding bracket which carries a saddle in which an end of a coil spring is positioned. The other end of the coil spring is attached to an upstanding portion of the bracket on the beam of the implement. A rod passes through the coil spring, being also attached to the upstanding portion of the bracket on the beam and is threadedly attached to the saddle. The pressure applied by the share or other earth working tool to the ground is adjusted by adjusting the threaded bolt attached to the saddle.

Similar forms of such cultivating tools and mechanisms can be seen in US Patent Specifications Nos. 4,177, 865; 4,011,915 and 4,530,406.

While such implements are variously successful, it appears that difficulty occurs in altering the pitch or angle of attack of the share or earth working tool attached to the end of the tyne. This variation is ofter, required depending on the type of soil the implement is cultivating. One not very satisfactory solution is to place spacers underneath the share between the share and the end of the tyne. If the share is attached hy a pair of bolts, spacers can be placed on a selected bolt between the share and the end of the tyne.

Also it is known that problems often occur when cultivating land which has a degree of either green or dry growth, as this often tends to accumulate around a 3 0 tyne or a number of tynes and cause a severe blockage of the implement.

sl-- Ills~ It is an object of this invention to overcome one or more of the above problems BRIEF STATEMENT OF THE INVENTION Thus there is provided according to one form of the invention, a tyne assembly for a cultivating implement, said tyne assembly including a bracket for attachment to a beam of the implement, said bracket extending rearwardly of the beam and having pivoted thereto a downwardly extending tyne shank holder, a tyne attached to said tyne shank holder, spring means pivotally attached to the said bracket rearwardly of the pivot of the tyne shank holder to apply spring pressure on the tyne, said spring means being pivoted to the lower end of the tyne shank holder, an 1 0 adjustment means to adjust the length of action of the spring means to thereby :i, vary the pitch or angle of attack of the end of the tyne relative to the soil being cultivated without effecting the spring pressure on the tyne.

4oo° In an alternate form of the invention there is provided a tyne assembly for a cultivating implement, said tyne assembly including a spring loaded tyne pivoted 1 5 to a bracket attachable to a beam of the implement, said tyne extending generally downwardly and then curving backwardly and then forwardly to the end of the tyne to which the share or other earth working tool is attached, the shape and curvature of the tyne being such that as the dry growth collects on the tyne it moves up along the curved portion and at the point where the curved portion changes direction into the straight portion, this change of direction causes the accumulated material to fall from the tyne and thus pass from the implement.

044*** 4 BRIEF DESCRIPTION OF THE DRAWING FIG. 1 of the accompanying drawing is a side view of the invention.

DESCRIPTION OF THE PREFERRED EMBODIMENT As illustrated in the drawing the tyne assembly comprises a bracket 1 which can be attached to a beam (not shown of an implement. The bracket extends rearwardly of the beam and has pivoted thereto by a pivot bolt 3 at a position just above the upper portion of the beam, a tyne shank holder 2. A tyne 4 is attached to the tyne shank holder 2.

O 0The tyne shank holder is provided with a rearwardly extending portion to which is 1-1 ~1---41 4 pivoted by pivot pin 14 to a clevis 5 into which the lower end of a spring bolt 6 is threaded, which bolt extends upwardly and passes through the end of a saddle 7, the upper end of the spring bolt having its head 8 to engage the end of the saddle 7. The lower end of the spring bolt has a nut 9 which positions a spring seat 10 on which rests the lower end of a spring 11. The saddle 7 is pivoted to the bracket 1 by a pivot 12 on the rearward extension of the bracket 1 at a position generally at the same relative height as the pivot bolt 3, or slightly higher than the pivot bolt 3.

The upper end of the spring 11 engages against the inner surface of the end 15 of saddle 7. It is noted that the tyne shank holder and the tyne extend generally 1 0 downwardly and slightly rearwardly and it will be seen that when a share or other earth working tool engages an obstruction that the tyne and tyne shank holder will move backwardly and upwardly relative to the beam as it pivots about the pivot bolt 3 to thus clear the obstruction.

;In a preferred form of the invention there may also be provided an inner spring 13 which is within the outer spring 11.

It is noted that by the construction, a compact unit is provided without diminishing the length of spring required Thus as shown the saddle 7 is preferably pivoted :ii towards its lower end, and the spring extends through the saddle and engages on the inner surface of the upper end of the saddle. In this way as the pivot point 12 is not at the end of the spring and thus is closer to the pivot 14, the spring pressure is effectively increased relative to the angle of movement of the tyne compared with *'ithe pivot being at the end of the spring.

The lower end of the spring bolt 6 screws into the clevis 5, and is locked in positioned by a nut 16. Thus the effective length of the bolt 6 can be adjusted to vary the distance between the pivot 14 and the pivot 12 by screwing the bolt in the clevis by applying a wrench or the like to the head 8. This then provides an adjustment for providing a variation in the pressure on the cultivating tool attached to the tyne which will cause movement of the tyne to clear an obsxcclt, called the 3 0 breakoff of the tyne.

In the longest setting of the bolt when the tyne is thus positioned in the forward position, the breakoff pressure will increase rapidly before the leverage ar iied by the spring decreases.

in the rearward position with the effective length of the bolt at its minimum, breakoff I ~'II.1 pressure will not rapidly increase, but the spring leverage pressure will decrease rapidly. Thus it will be seen that there are many settings between the maximum and minimum movements of bolt travel about the pivot 12. The midway position provides the highest spring leverage and breakoff press.

Thus with this feature if the tilling share is changed to a different pitch, a different tyne pressure rating can be obtained. In this way, in hard ground without stumps or rocks, a higher working pressure can be obtained. Conversely in lighter soils where there are rocks and stumps, a lighter pressure may be obtained to reduce spring leverage quickly to allow the tyne to rise to allow the rocks or stumps to 1 0 pass underneath the tyne more easily. It is to be noted that these settings can be changed without altering the pre-set spring pvessure on bracket The two-piece configuration of the tyne holder 2 and the tyne shank 4 permits variation of the overall length of the tools by provision of various holes in the tyne holder for the mounting bolt. This then provides wider scope for tyne pressure 1 5 leverage, trash clearance, or individual depth of cut for the tyne following in tractor compacted wheel tracks, or banding or seeding elements at different depths.

9 Also the tyne holder provided a holder for the attachment of other earth working tools, such as disc seeding attachments, special direct drilling tynes, press wheels or other tools as required.

It will be seen that if it is desired to change the pitch angle or angle of attack of the tyne to the soil being cultivated, then it is merely required to adjust the effective length of the spring bolt 6 by adjustment of the nut 16. This adjustment will thus pivot the tyne and the tyne shank holder about the pivot bolt 3 to thus change of angle of attack of the share or other earth working tool to the soil. The tension of the springs 11, 13 can also be varied by adjusting nut 9.

It is to be noted that the tyne itself can readily be removed and replaced in the tyne shank holder by undoing two bolts. This would be desirable for maintenance purposes, and also when the implement is to be used for other purposes instead of straight cultivation, for example when tynes may be removed for wider spacing 3 0 between the tynes.

It is also to be noted that the tyne has a straight shank portion and then curves rearwardly and then downwardly and forwardly. This shape has the general effect RA on the growth on the ground being cultivated. The dry growth can collect on the I 6 lower portion of the tyne and then roll or move upwardly around the curved portion. When the dry growth reaches the change of direction at the junction of the curved portion with the straight portion, this change of direction causes the dry growth to fall from the tyne and then pass from the implement.

Thus it will be seen that according to the invention, there is provided a tyne assembly for a cultivating implement in which there is a spring loaded tyne with a stump jump action, and in which the pitch or angle of attack of the tyne to the soil being cultivated can be varied. Also there is provided a tyne having a shape which will readily discard any dry growth or the like from the tyne.

1 0 While the above is directed to one form of the invention, it is to be realised that the invention is not to be limited thereto but includes variations and modifications "falling within the spirit and scope of the invention.

s gI 3PI

Claims

1. A tyne as.,embly for a cultivating implement, said tyne assembly including a bracket for attachment to a beam of the implement, said bracket extending rearwardly of the beam and having pivoted thereto a downwardly extending tyne shank holder, spring means pivotally attached to the said bracket rearwardly of said pivot of the tyne shank holder to apply spring pressure on the tyne, said spring means being pivoted to the lower end of the tyne shank holder, and adjustment means to adjust the length of action of the spring means to thereby vary the pitch or angle of attack of an earth working tool on the end of a tyne shank 1 0 -attached to the tyne shank holder without effecting the spring pressure on the tyne.

2. A tyne assembly as defined in claim 1 wherein said spring means includes a saddle having an open end and a closed end pivotally attached to bracket toward the open end of the saddle, a spring bolt extending from the tyne shank holder to the saddle, and at least one spring surrounding said spring bolt arnJ 1 5 bearing against the closed end of the saddle and against a spring seat adjustably positioned on said spring bolt.

3. A tyne assembly as defined in claim 2 wherein the saddle is pivoted to the said bracket adjacent the open end of the saddle so that the spring bolt and said spring extend past the said saddle pivot.

4. A tyne assembly as defined in claim 2 or claim 3 wherein a ferrule is pivoted to an extension of the tyne holder, said spring bolt extending into said ferrule, locking means limiting the extension of the spring bolt into said ferrule.

A tyne assembly as defined in claim 4 wherein the locking means is adjustable on the spring bolt, whereby the breakoff pressure and the spring leverage 2 5 pressure is adjustable depending on the ground conditions in which the tyne assembly is to operate.

6. A tyne assembly as defined in any one of the preceding claims wherein the tyne attached to the tyne holder has a curvature such that accumulated rubbish will roll up the curved portion of the tyne and meet an abrupt change in curvature 3 0 so that the accumulated rubbish spills from the tyne. I IBI I 8

7. A tyne assembly substantially as hereinbefore described with reference to the accompanying drawings. Dated this 13th day of January 1997 LEMMING INVESTMENTS PTY LTD By their Patent Attorneys, COLLISON CO. 0* S S S S S. ^To I dr r ~Cs_ L_ _L ABSTRACT A tyne assembly for an earth working implement, the tyne assembly being attached by a bracket to a beam of the implement. The tyne assembly has a saddle pivoted to the bracket to receive the upper end of a spring, the lower end of the spring being seated on an adjustable seat attached to a spring bolt passing through the spring. The lower end of the spring bolt is adjustably positioned in a ferrule pivoted to the lower end of a tyne holder pivoted to the bracket. s 0555 *0* S I 1 Y lll 11 9 133 12 16 .14 flig I