GB2232568A

GB2232568A - Implement point assembly

Info

Publication number: GB2232568A
Application number: GB9012692A
Authority: GB
Inventors: John Christopher Jeffrey
Original assignee: MCCONNEL F W Ltd; FW McConnel Ltd
Current assignee: MCCONNEL F W Ltd; FW McConnel Ltd
Priority date: 1989-06-13
Filing date: 1990-06-07
Publication date: 1990-12-19
Also published as: GB9012692D0; GB8913506D0

Abstract

A soil-working point assembly for an agricultural implement has a mounting shank (1) for attachment to a frame of the implement, a cutting point (5) on the free end portion of the shank, and a protective wear shin (11) mounted, in use, over the leading surface of the shank, the forward end portion of the shin having a projection (12) which engages in a socket (10) of the cutting point to form a connection between the shin and point. A strap 13 holds the shin against the shank. <IMAGE>

Description

IMPLEMENT POINT ASSEMBLY This invention relates to a soil-working point assembly, primarily for an agricultural implement, of thegeneral kind which includes a mounting shank forming part of or attached in use to a frame of the implement, a cutting point mountable, in use, on the free end portion of the shank, and a wear shin for mounting over the leading surface of the shank to protect the latter from excessive wear during movement through the ground when working.

In order to secure the shin in its normal protective position on the shank, it has been proposed to provide a stirrup or similar formation at the intended lower end of the shin which is passed over the free end of the shank prior to fitting the point to the latter, the shin being provided also with an integral loop formation at its upper end for connection of the upper end of the shin to the shank. Although this arrangement is generally satisfactory in use, it is uneconomical to make and can be inconvenient to assemble.

An object of the invention is to provide an implement point assembly which is simpler to make and assemble than the aforesaid conventional arrangement.

According to the present invention, in an implement point assembly of the aforesaid general kind, the forward end portion of the shin and rear end portion of the cutting point are provided with formations which are interengagable to form a connection between the shin and point.

In one typical practical arrangement, the formations comprise respectively a projection, preferably on the shin, and a socket, preferably in the point, arranged to receive the projection.

Conveniently, separate connecting means are provided to secure the upper end portion of the shin to the shank. Such connecting means is preferably a loop formation forming a strap which is positioned to embrace the shin and shank, in use, and includes fixing means to clamp the strap securely in position.

The invention will now be described, by way of example, with reference to the accompanying drawings in which: Figure 1 is an exploded perspective view of one form of the implement point assembly of the invention, and Figure 2 illustrates the point assembly of figure 1 in its assembled condition.

Referring to the drawings, the implement point assembly illustrated therein is intended for mounting on an agricultural soil working implement which includes a shank 1, the upper end of which is provided with a bracket 1A for attachment to an implement main frame (not shown). The shank includes a downwardly extending tapered portion 1B, from the intended lower end of which extends a generally forwardly projecting portion 3, the forward extremity 4 of which is tapered to receive a cutting point 5 thereon. The cutting point includes a forward working extremity 6 and a shank-receiving portion 7 in which is formed a tapered socket (not shown) to receive the forward tapered end portion 4 of the shank.

The said portion 4 is provided with a pair of retention pips 8, one of which can be seen in the drawing, and the point is provided with corresponding openings 9 which receive the pips when the point is forced onto the shank.

The intended rear end of the portion 7 is provided with a formation in the form of a small socket 10, for the purpose to be described.

A further component of the assembly is a protective shin 11 which is intended to be mounted over the forwardly facing edge 2 of the shank 1, the shin being made of hard material in order to protect the covered edge of the shank during movement thereof through the ground, when working, for which purpose the shape of the shin generally matches that of the shank, in conventional manner. The forward end of the shin 11 is provided with a formation in the form of a projection 12 which is of generally part-cylindrical cross-section and complementary with the small socket 10 formed in the rear end of the point so that the socket and projection may readily be closely interengaged. A connecting device 13 is a generally U-shaped strap and the shin is provided with a groove 14 to receive the base of the U.Fixing means are illustrated in the form of a nut and bolt assembly 15 for clamping the free ends of the loop.

Figure 2 illustrates the arrangement of the invention in its assembled condition with the point 5 forced onto the tapered portion 4 of the shank, the projections 8 of the shank then being located within the openings 9 of the point. The shin 11 lies against the surface 2 of the shank and the projection 12 is engaged within the small socket 10 in order to interconnect the shin and point in such a manner as to prevent any possibility of the shin lifting away from the point, in use. The strap 13 embraces the shin and shank, being engaged within the groove 14 of the shin, the fixing device 15 being assembled behind the rear surface of the shank to clamp the free ends of the strap 13 together and thereby securely hold the upper end of the shin against the shank.

The invention will be seen to provide an implement point assembly which is simple to manufacture and which may be readily assembled and dismantled, when required.

In particular, it is possible to remove either the shin or point without disturbing the other of these components, thereby enabling servicing to be undertaken more readily than in some conventional arrangements.

Claims

1. A soil-working point assembly comprising a mounting shank forming part of or attached to a frame of an implement, a cutting point mountable, in use, on the free end portion of the shank, and a wear shin for mounting over the leading surface of the shank to protect the latter from excessive wear during movement through the ground when working, the forward end portion of the shin and rear end portion of the cutting point being provided with formations which are interengagable to form a connection between the shin and point.

2. An assembly according to Claim 1, wherein the formations comprise respectively a projection on one of the shin and point and a socket in the other of the shin and point arranged to receive the projection.

3. An assembly according to Claim 2, wherein the projection is on the shin and the socket in the point.

4. An assembly according to Claim 2 or Claim 3, wherein the projection is generally part cylindrical in cross-section and the socket is of complementary shape.

5. An assembly according to any one of the preceding claims wherein a strap embraces the shin and shank in use at a location spaced from the point to hold the shin against the shank.

6. An assembly according to Claim 5, wherein the strap is generally U-shaped and is clamped in its embracing position by securing means engaged with the free ends of its arms.

7. An assembly according to Claim 5 or Claim 6, wherein the strap is engaged in a groove in the shin to locate the strap longitudinally of the shin.

8. An assembly according to any one of the preceding claims wherein the shank and point are provided respectively with further formations which come into engagement when the shank is forced into the point.

9. A soil working point assembly substantially as hereinbefore described with reference to the accompanying drawings.