AU2003252933B2

AU2003252933B2 - Wear resistant system

Info

Publication number: AU2003252933B2
Application number: AU2003252933A
Authority: AU
Inventors: Angus Bowes; Stuart Bowes
Original assignee: Broons Hire S A Lt Pty
Current assignee: Broons Hire (sa) Ltd Pty
Priority date: 2002-10-14
Filing date: 2003-10-13
Publication date: 2008-05-22
Anticipated expiration: 2023-10-13
Also published as: AU2003252933A1

Description

54055 GEH:PFB P/00/009 Regulation 3.2

AUSTRALIA

Patents Act 1990 COMPLETE SPECIFICATION FOR A STANDARD PATENT

ORIGINAL

Name of Applicant: BROONS HIRE PROPRIETARY LIMITED Name of inventor(s): STUART BOWES ANGUS BOWES Address for Service: COLLISON CO., 117 King William Street, Adelaide, S.A. 5000 Invention Title: WEAR RESISTANT SYSTEM Details of Associated Provisional Applications: 2002952022 Dated 14 th October 2002 The following statement is a full description of this invention, including the best method of performing it known to us: This invention relates to a wear resistant system, more particularly in the field of compacting earth works or breaking rocks and rubble by a multi-lobed roller.

It is known that compaction of earth works and other areas requiring compaction or crushing of rock, rubble or the like are known, such as by Australian Patent Nos. 475137, 487085, 56098, and 582700. These describe various features of a multi-lobed roller in which a large roller weighing in the vicinity of 12 to 13 tonnes is drawn over the surface to be treated either by compaction and/or by crushing of the material over which the roller is drawn.

Also there is known Australian Application No. 41311/96 corresponding to United States Patent No. 5462387.

Australian Patent No. 582700 is directed to a multi-lobed roller, each lobe of the roller having a ground engaging surface which has a leading portion and a trailing portion, and at least one projection standing proud of the leading portion of each ground engaging surface. This projection is an anti-skid projection to ensure the roller turns and does not skid or slide over the surface, it ensures the roller turns to provide the compacting action.

US Patent No 5462387 is directed to the provision of a ridge projecting outwardly from the impact surface of each lobe as a concrete breaking apparatus. This ridge is positioned on each lobe rearwardly of the anti-skid lobe of the above patent No. 582700.

However it has been found that when the roller is operated on very abrasive surfaces the roller is subjected to severe wear. Rollers are manufactured from mild steel and this suffers from the abrasive action of many materials. In one instance in an open cut mining operation the material remaining from the blasting and mining operation consists of relatively large sharp edged abrasive material which damages the tyres of large earthmoving vehicles. It has been found that if the material is broken or reduced in dimension there is less damage to pneumatic tyres. This reduction in size has been successfully achieved by passing a lobed roller over the material acting as a rock crusher.

However this abrasive material results in severe abrasive wear on the lobed roller.

It is an object of this invention to provide a wear resistant system for a lobed roller.

Thus there is provided according to the invention a roller for compacting and crushing rock and abrasive material said roller being a non-circular multilobed roller and an axle connected to a draw frame, each roller having a lobe and an impact portion to contact the rock or material being treated, characterised in that the roller has a plurality of wear resistant plates attached to wearing surfaces of the roller, which wear resistant plates can be removed and replaced to protect the surface of the roller.

Preferably the plates extend across the width of the roller.

Preferably the plates extend from a leading portion of the lobe towards the trailing portion.

Preferably at the leading portion of each lobe there is an upstanding ridge to assist in protecting the wear of the leading portion of the wear plates.

In order to more fully describe the invention reference will now be made to the accompanying drawings in which:- Figure 1 is an end view of one form of the lobed roller, and Figure 2 is a perspective view of the roller of Figure 1.

The figures illustrate a lobed roller 1 rotatable about an axle 2 the roller is basically square in shape but has lobes 3 leading to impact surfaces 4. In operation the roller rotates in the direction of arrow 5 so that as the roller rolls over the lobe 3 it will drop with an impact on the surface over which the roller is passing, the impact area 4 compacting and/or crushing the surface on which it impacts.

The roller is provided with one or more wear resistant plates 6 and 7 extending across the roller. The plates 7 that extend around the lobe are of lesser width than the plate 6. The plates 6 and 7 are of wear resistant and abrasive resistant material and are welded to the surface of the roller. In this way as the wear plates become worn down after use they are removed and replaced with further wear plates thus extending the life of the roller.

The invention also optionally includes a further abrasive resistant ridge member 8 extending from the roller surface adjacent the leading wear plate 6 this ridge member extending across the width of the roller and is of greater height than the plates 6. This ridge member 8 protects the leading edge of the front wear plate 6, the ridge member being more easily replaceable than the plates 6.

The ridge member 8 extends a greater distance above the surface of the roller and is lesser in dimension in the circumferential direction than the plates 6.

Thus this ridge member has a dimension above the surface of the roller which can be in excess of the circumferential dimension of the base of the ridge member 8. In this way as the roller rotates this ridge member will contact the material before the wear plates 6 and receive the initial impact and any sliding motion. Thus this will protect the larger wear resistant plates 6. However the smaller ridge member is easier to remove and replace thus saving expensive downtime.

While it is preferred the plates extend as a unit across the width of the roller, each may be in sections across the roller, so that sections as they wear can be replaced.

It will be seen that the plates 6 by extending axially across the roller, the plates are not so critical in conforming to the contour of the outer surface of the roller.

However the invention is not to be limited to the plates extending axially across the roller, but the invention includes plates extending circumferentially of the roller, these plates preferably being preformed to the contour of the outer surface of the roller. Thus a number of plates may be positioned axially of the roller.

In a further alternative not shown, the plates may be positioned at an angle to axial and rotational direction of the roller. Thus they may be positioned at an angle across the surface of the roller. However to ensure the directional rotation of the roller is not influenced by the angle of the plates it is preferred the plates be positioned in V or chevron position so that the angular effect is equalised on the roller.

Thus it can be seen that according to the invention there is a wear resistant system for lobed rollers, and although one form of the invention has been described in some detail the invention is not limited thereto and variations and modifications fall within the spirit and scope of the invention.

Claims

1. A roller for compacting and crushing rock and abrasive material, said roller being a non-circular multi-lobed roller on an axle connected to a draw mq frame, the roller having spaced lobes and an impact portion between each lobe 02 5 to contact the rock or material being treated, characterised in that the roller has tf a plurality of wear resistant plates attached to the wearing surfaces on the impact portion, and an upstanding wear resistant ridge attached to the impact Sportion adjacent the leading edge of the leading wear resistant plate, whereby the upstanding ridge and the wear resistant plates can be individually removed and replaced when worn to protect the surface of the roller.

2. A roller as defined in claim 1 wherein the upstanding ridge has a height greater than the adjacent wear plate whereby in operation the upstanding ridge contacts the material compacted and crushed prior to the wear plates contacting the material.

3. A roller as defined in claim 1 or claim 2 wherein the wear plates and upstanding ridge extend across the width of the roller.

4. A roller as defined in any one of the preceding claims wherein the wear plates extend from a leading portion of a lobe to the trailing portion of the lobe, the wear plates having a lesser width around the lobe.

5. A roller as defined in any one of the preceding claims wherein the wear plates extend at an angle to the rotational direction of the roller.

6. A roller substantially as hereinbefore described with reference to the accompanying drawings. COMS ID No: ARCS-186188 Received by IP Australia: Time 16:22 Date 2008-04-09