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Title:
HAUL TRUCK IMPROVEMENTS
Document Type and Number:
WIPO Patent Application WO/2019/104367
Kind Code:
A1
Abstract:
The present disclosure relates to haul trucks, and to dump trays for haul trucks. In one aspect, there is provided a haul truck dump tray comprising a tray shell, a frame supporting the shell, and a plurality of shock dampeners interposing the shell and the frame. The tray shell and the frame are both predominantly constructed of composite materials, and the shock dampeners absorb and dampen shocks imparted as material is dropped in the dump tray, reducing the extent to which the shell and frame must absorb these shock loadings.

Inventors:
REYNOLDS, Grant, Christopher (1 Sleat Road, Applecross, W.A. 6153, AU)
Application Number:
AU2018/000230
Publication Date:
June 06, 2019
Filing Date:
November 26, 2018
Export Citation:
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Assignee:
MIS.CARBONART PTY LTD (1 Sleat Road, Applecross, W.A. 6153, AU)
International Classes:
B60P1/28; B61D9/06; B62D29/04; B62D33/02
Foreign References:
US20040183334A12004-09-23
JPS59140972U1984-09-20
US20120301264A12012-11-29
AU2013205645A12013-07-11
US20130069417A12013-03-21
EP0703115A11996-03-27
Attorney, Agent or Firm:
MADDERNS PATENT AND TRADE MARK ATTORNYES (GPO Box 2752, Adelaide, S.A. 5001, AU)
Download PDF:
Claims:
CLAIMS

1. A haul truck dump tray comprising a tray shell, a frame supporting the shell externally, and a plurality of shock dampeners interposing the shell and the frame.

2. The haul truck dump tray of claim 1, wherein the frame is predominantly constructed of composite materials.

3. The haul truck dump tray as in either of claims 1 or 2, wherein the tray shell is predominantly constructed of composite materials.

4. The haul truck dump tray as in any one of the preceding claims, wherein the frame comprises a pivot mount for mounting the dump tray to a dump truck.

5. The haul truck dump tray as in any one of the preceding claims, wherein the frame comprises a hoist mount for mounting a hoisting ram to the tray.

6. The haul truck dump tray as in any one of the preceding claims, wherein the shell comprises at least one external support member on an exterior surface thereof.

7. The haul truck dump tray of claim 6, wherein the shell comprises a plurality of external support members.

8. The haul truck dump tray of claim 7, wherein the plurality of external support members comprises a pair of‘hungry boards’ (side wall extensions), each of which extends along an upper edge of each side wall of the shell.

9. The haul truck dump tray as in either of claims 7 or 8, wherein the plurality of external support members comprise a plurality of side supports, each of which extends from beneath the shell, and up a side of the shell.

10. The haul truck dump tray of claim 9, wherein the side supports are arranged in pairs, where each pair comprises a side support for each side of the shell, and where the pairs are spaced apart along the shell.

1 1. The haul truck dump tray as in either of claims 9 or 10, wherein each of the side supports overlaps with one of the hungry boards.

12. The haul truck dump tray of claim 11, wherein each of the hungry boards comprises a plurality of recesses formed therein and spaced apart therealong, there being one recess for each of the side supports which overlaps the hungry board.

13. The haul truck dump tray as in any one of claims 7 through 12, wherein each of the shock dampeners interposes the frame and one of the external support members for the shell.

14. The haul truck dump tray as in any one of claims 9 through 13, wherein an underside of each of the side supports comprises a seat for one of the shock dampeners.

15. The haul truck dump tray as in any one of the preceding claims, wherein the frame comprises a pair of rails which extend from near a front edge of the shell to near a rear edge thereof, where the rails are spaced apart and bridged by a plurality of cross members.

16. The haul truck dump tray of claim 15, wherein each of the cross members comprises a pair of spaced apart apertures through which the rails pass.

17. The haul truck dump tray as in either of claims 15 or 16, wherein each of the rails is comprised of a plurality of segments connected by joiners.

18. The haul truck dump tray as in any one of claims 15 through 17, wherein select cross members comprise a pair of cantilever lateral support arms extending therefrom for supporting the shell at outer positions.

19. The haul truck dump tray of claim 18, wherein select cantilever lateral support arms carry a shock dampener.

20. The haul truck as in any one of the preceding claims, wherein the tray shell comprises a plurality of shell panels joined along contiguous edges by panel edge joiners.

21. The haul truck dump tray as in any one of the preceding claims, wherein the dump tray further comprises a wear liner for the shell, which nests in the shell.

22. The haul truck dump tray as in any one of the preceding claims, wherein the shell comprises a floor, a pair of side walls, an end wall, and a canopy.

23. The haul truck dump tray as in any one of the preceding claims, wherein select shock dampeners are dual acting dampeners providing dampening during both compression and rebound.

24. The haul truck as in any one of claims 1 through 22, wherein select shock dampeners are single acting dampeners providing dampening during compression only.

25. The haul truck as in any one of the preceding claims, wherein each of the shock dampeners comprises at least one suspension airbag. 26. A haul truck chassis to which there is pivotally attached haul truck dump tray of any one of claims 1 through 24.

Description:
HAL L TRUCK IMPROVEMENTS

PRIORITY DOCUMENTS

[0001] The present application claims priority from:

[0002] Australian Provisional Patent Application No. 2017904828 titled “HAUL TRUCK

IMPROVEMENTS” and filed on 30 November 2017; and

[0003] Australian Provisional Patent Application No. 2018900644 titled “HAUL TRUCK

IMPROVEMENTS” and filed on 28 February 2018; and

[0004] the content of each of which is hereby incorporated by reference in its entirety.

INCORPORATION BY REFERENCE

[0005] The following publication is referred to in the present application and its contents are hereby incorporated by reference in their entirety:

International Publication No. WO2015/089550 titled“A LIGHTWEIGHT CONTAINER” in the name of MIS.CARBONART Pty Ltd.

TECHNICAL FIELD

[0006] The present disclosure relates to haul trucks, and to dump trays for haul trucks.

BACKGROUND

[0007] A haul truck is an off-road, rigid dump truck specifically engineered for use in high-production mining and heavy-duty construction environments. A typical haul truck comprises a truck chassis to which there is pivotally attached a dump tray which is fabricated from steel, so as to possess the requisite strength, rigidity and durability.

[0008] The gross weight of any vehicle is the sum of its tare (or unladen weight) and its payload (weight of goods carried). Reducing the gross weight of a vehicle provides gains in fuel economy, lifespan of numerous components and tyre life. Reducing the tare weight of a vehicle potentially facilitates an increase in payload.

[0009] It is against this background and the problems and difficulties associated therewith that the present invention has been developed. [0010] Certain objects and advantages of the present invention will become apparent from the following description, taken in connection with the accompanying drawings, wherein, by way of illustration and example, an embodiment of the present invention is disclosed.

SUMMARY

[0011] According to a first aspect, there is provided a haul truck dump tray predominantly constructed of composite materials so as to weigh significantly less than a steel dump tray of equivalent size.

[0012] In one form, the haul truck dump tray comprises a tray shell, a frame supporting the shell, and at least one shock dampener interposing the shell and the frame.

[0013] In one form, a plurality of shock dampeners interpose the shell and the frame.

[0014] In one form, the shock dampeners also retain the tray shell to the frame.

[0015] In one form, the frame is predominantly constructed of composite materials.

[0016] In one form, the shell is predominantly constructed of composite materials.

[0017] In one form, the frame comprises a pivot mount for mounting the dump tray to a dump truck.

[0018] In one form, the frame comprises a hoist mount for mounting a hydraulic hoisting ram to the tray.

[0019] In one form, the frame extends beneath the tray shell. In one form, the frame extends around the tray shell.

[0020] In one form, the shell comprises at least one external support member on an exterior surface thereof.

[0021] In one form, the shell and the or each of the external support members are mutually structurally supportive of each other. That is to say, the shell is a structural, load bearing element.

[0022] In one form, the tray shell comprises a plurality of shell panels joined along contiguous edges by panel edge joiners.

[0023] In one form, the shell comprises a plurality of external support members. [0024] In one form, each of the shock dampeners interposes the frame and one of the external support members for the shell.

[0025] In one form, the plurality of shell support members comprise a pair of‘hungry boards’ (side wall extensions), each of which extends along an upper edge of each side wall of the shell.

[0026] In one form, the plurality of shell support members comprise a plurality of side supports, each of which extends from beneath the shell, and up a side of the shell.

[0027] In one form, the side supports are arranged in pairs, where each pair comprises a side support for each side of the shell, and where the pairs are spaced apart along the shell.

[0028] In one form, each of the side supports overlaps with one of the hungry boards.

[0029] In one form, each of the hungry boards comprises a plurality of recesses formed therein and spaced apart therealong, there being one recess for each of the side supports which overlaps the hungry board.

[0030] In one form, an underside of each of the side supports comprises a seat for one of the shock dampeners.

[0031] In one form, the dump tray further comprises a wear liner for the shell, which nests in the shell.

[0032] In one form, the wear liner comprises a plurality of wear panels of wear resistant steel plate cut to shape and joined along contiguous edges to form the wear liner.

[0033] In one form, the frame comprises a pair of rails which extend from near a front edge of the tray to near a rear edge thereof, where the rails are spaced apart and bridged by a plurality of cross members.

[0034] In one form, each of these cross members comprises a pair of spaced apart apertures through which the rails pass.

[0035] In one form, each of the rails is comprised of a plurality of segments connected by joiners, which conform the rails to the shape of the shell.

[0036] In one form, select cross members comprise a pair of cantilever lateral support arms extending therefrom for supporting the shell at outer positions.

[0037] In one form, select cantilever lateral support arms carry a shock dampener. [0038] In one form, to each of the rails there is secured a pivot mount for mounting the tray to the truck chassis.

[0039] In one form, the shell comprises a floor, a pair of side walls, an end wall, and a canopy.

[0040] In one form, select shock dampeners are dual acting dampeners providing dampening during both compression and rebound.

[0041] In one form, select shock dampeners are single acting dampeners providing dampening during compression only.

[0042] In one form, each of the shock dampeners comprises at least one suspension airbag.

[0043] According to a further aspect, there is provided a haul truck chassis to which there is pivotally attached the above described haul truck dump tray.

[0044] According to a further aspect, there is provided a haul truck comprising a truck chassis to which there is pivotally attached a haul truck dump tray, the haul dump tray being predominantly constructed of composite materials so as to weigh significantly less than a steel dump tray of equivalent size.

[0045] According to a further aspect, there is provided a haul truck comprising a truck chassis to which there is pivotally attached a haul truck dump tray, the haul dump tray comprising a tray shell, a frame extending beneath the shell, and a plurality of shock dampeners interposing the shell and the frame.

BRIEF DESCRIPTION OF DRAWINGS

[0046] Embodiments of the present invention will be discussed with reference to the accompanying drawings wherein:

[0047] Figure 1 is a side view of a haul truck with its tray lowered;

[0048] Figure 2 is a side view of the haul truck of Figure 1 with its tray raised;

[0049] Figure 3 is a front view of the haul truck;

[0050] Figure 4 is a rear view of the haul truck;

[0051] Figure 5 is an isometric view of a shell of the tray from the haul truck of Figure 1; [0052] Figure 6 is a side view of the tray shell of Figure 5;

[0053] Figure 7 is a rear view of the tray shell;

[0054] Figure 8 is an isometric view of a frame for the tray;

[0055] Figure 9 is a side view of the frame;

[0056] Figure 10 is a rear end view of the frame;

[0057] Figure 11 illustrates a pivot mount for the tray in isolation;

[0058] Figure 12 is a detail view of a lower corner joiner for the frame;

[0059] Figure 13 is a detail view of an upper corner joiner for the frame;

[0060] Figure 14 is a detail view of a torque tube cross member for the frame;

[0061] Figure 15 is a cross-sectional view taken through a beam;

[0062] Figure 16 illustrates a rear cross member;

[0063] Figure 17 illustrates the rear cross member of Figure 16 with a partial cross-section;

[0064] Figure 18 is a detail view of a dual acting dampener;

[0065] Figure 19 is a detail view of a single acting dampener;

[0066] Figure 20 is a detail view of a tray location guide;

[0067] Figure 21 is a detail view of a hungry board;

[0068] Figure 22 is a detail view of a shell side support;

[0069] Figure 23 is a detail view of a tail bumper;

[0070] Figure 24 is a detail cross-sectional view of a normal shell panel;

[0071] Figure 25 is a detail cross-sectional view of an impact zone shell panel; [0072] Figure 26 is an isometric view of a wear liner assembly for the tray;

[0073] Figure 27 is a side view of the wear liner assembly;

[0074] Figure 28 is a front end view of the wear liner assembly;

[0075] Figure 29 is an isometric view of a canopy assembly from the tray;

[0076] Figure 30 is a top view of the canopy assembly;

[0077] Figure 31 is a side view of the canopy assembly;

[0078] Figure 32 is a rear end view of the canopy assembly;

[0079] Figure 33 is a detail view of a front ridge from the canopy assembly;

[0080] Figure 34 is a detail view of a canopy rock deflector; and

[0081] Figure 35 is a cross-sectional view through a canopy liner panel.

[0082] In the following description, like reference characters designate like or corresponding parts throughout the figures.

DESCRIPTION OF EMBODIMENTS

[0083] Referring now to Figures 1 through 4, where there is shown a haul truck 100 comprising a truck chassis 102 to which there is pivotally attached a dump tray 1 so that hydraulic rams 104 may lift the front of the tray 1 to tilt it rearwards so that the material in the dump tray 1 can be deposited ("dumped") on the ground behind the haul truck 100.

[0084] The illustrated truck chassis 102 comprises a cab 106 and rides on two axles 108 and 110, but some trucks have three axles.

[0085] Unless otherwise specified in the description of the dump tray 1 which follows, components thereof are made from carbon-fibre reinforced plastic, or sandwich-structured composites comprising skins of either carbon-fibre reinforced plastic or wear resistant steel plate, and cores of lightweight material such as foam or a honeycomb, depending on structural and wear requirements. [0086] The dump tray 1 comprises a frame 10, a shell 50 and a plurality of shock dampeners 36 and 38 interposing the shell 50 and the frame 10. The frame 10 extends beneath and around the shell 50, and supports the shells 50 via the shell supporting dampeners 36 and 38, which are located at a number of spaced apart positions around the shell 50. Additional to these dampeners 36 and 38, pads of an elastomeric material (not illustrated) interpose the shell 50 and the frame 10. In this way, the dampeners (and to some extent the pads) absorb and dampen shocks imparted as material is dropped in the dump tray 1, reducing the extent to which the shell 50 and frame 10 must absorb these shock loadings.

[0087] The shell comprises a floor, a pair of side walls, an end wall, and a canopy.

[0088] With reference to Figures 8 through 10, it can be seen that the frame 10 comprises a pair of rails 12 which extend from near a front edge of the tray 1, to near a rear edge thereof. The rails 12 are spaced apart and bridged by a plurality of cross members 14. Each of these cross members 14 comprises a pair of spaced apart apertures 16 through which the rails 12 pass.

[0089] Figure 15 illustrates a representative cross-sectional view taken through one of the rails 12. Each of the rails 12 comprises a beam 13 of rectangular hollow section and carbon-fibre reinforced plastic, with three smaller beams l3a of rectangular hollow section and carbon-fibre reinforced plastic nested therein.

[0090] To each of the rails 12 there is secured a pivot mount 18 for mounting the tray 1 to the truck chassis 102. One of these pivot mounts 18 is illustrated in greater detail in Figure 11. Each pivot mount comprises a channel for receiving a portion of a rail 12, and a bearing 19.

[0091] One of the cross members 15 comprises a pair of hoist mounts for mounting the hydraulic hoisting rams 104 to the tray 1.

[0092] Figures 16 and 17 illustrate a rear cross member 17, which will form a rear edge of the dump tray 1. Accordingly, cross member 17 comprises rock deflectors D and a lining of wear resistant steel plate.

[0093] To each of the rails 12 there is secured a location guide 20 for ensuring that the dump tray 1 is centrally positioned with respect to the truck chassis 102 as it is lowered from its raised position. One of these location guides 20 is illustrated in greater detail in Figure 20.

[0094] Each of the rails 12 is comprised of a plurality of segments connected by joiners, which include upper and lower corner joiners 30 and 32 which help to conform the rails 12 to the shape of the shell 50, by following the underside of each of the floor, end wall and canopy of the shell 50. [0095] One of the lower joiners 30 is illustrated in greater detail in Figure 12. One of the upper joiners 32 is illustrated in greater detail in Figure 13. Each of the comer joiners 30 and 32 comprises sockets for receiving the ends of beams 12 therein, and web extending between the sockets to strengthen and stiffen the joiners 30 and 32.

[0096] Extending outward from select cross members 14 in a cantilever fashion are lateral support arms 34 for supporting the shell 50 at outer positions.

[0097] A dual acting dampener 36 is fitted at the ends of two pairs of lateral support arms 34. These dual acting dampeners 36 provide dampening during both compression and rebound. One of these dual acting dampeners 36 is illustrated in greater detail in Figure 18, minus the two suspension airbags which will be mounted thereto on either side of the collar 37.

[0098] A single acting dampener 38 is fitted at the end of all but one pair of the remaining lateral support arms 34. The single acting dampeners 38 provide dampening during compression only. One of these single acting dampeners 38 is illustrated in greater detail in Figure 19, minus the suspension airbag which will be mounted thereto on the platform 39.

[0099] With reference to Figures 5 through 17, it can be seen that the shell 50 comprises a plurality of shell panels 52 and 54 joined along contiguous edges by panel edge joiners 56. The shell panels are comprised of normal shell panels 52, and impact zone shell panels 54 which have been adapted to withstand impacts associated with loading of the haul truck, and which are to be used in areas material will land on, such as the floor of the shell 50. A cross-section through an impact zone panel 54 is illustrated at Figure 25, and a cross-section through a normal panel 52 is illustrated at Figure 24.

[00100] The shell further comprises external support members, where the shell panels and the external support members are mutually structurally supportive of each other.

[00101 ] These external shell support members comprise a pair of‘hungry boards’ 60 (a common name for side wall extensions), each of which extends along an upper edge of each side wall of the shell, and a plurality of side supports 62, each of which extends from beneath the shell, and up a side of the shell to terminate at an overlap with one of the hungry boards 60.

[00102] One of the hungry boards 60 is illustrated in further detail in Figure 21.

[00103] One of the side supports 62 is illustrated in further detail in Figure 22. [00104] An underside of each of the side supports 62 comprises a seat 64 for one of the shock dampeners 36 and 38. The dampeners 36 and 38 are secured with respect to each of the frame 10 and the shell 50. In this way the dampeners 36 and 38 interpose the shell 50 and the frame 10 while securing the shell 50 with respect to the frame 10.

[00105] A tail bumper 66 is positioned to either side of the rear cross member 17. These tail bumpers 66 depend from the shell 50. Figure 23 illustrates one of these tail bumpers 66 in detail.

[00106] The dump tray 1 further comprises a wear liner 70 for the shell 50. With reference to

Figures 26 through 28, it can be seen that the wear liner 70 comprises a plurality of wear panels 72 of wear resistant steel plate cut to shape and joined along contiguous edges to form the wear liner. The assembled wear liner nests in the shell.

[00107] The dump tray further comprises a canopy assembly 80, which will extend over and protect the cab (and hence the operator) of the truck when the dump tray 1 is lowered. With reference to Figures 29 through 32, it can be seen that the canopy assembly 80 comprises a canopy liner panel 82 having a rear edge, a front edge, and a pair of side edges. A detailed cross-sectional view through this canopy liner panel 82 is illustrated at Figure 35.

[00108] A plurality of canopy attachment mounts 84 are positioned along the rear edge of the canopy assembly 80, to mount the canopy assembly 80 to the shell. Moreover, a plurality of plates known as‘meet up angles’ 85 extend along the rear edge of the canopy assembly to blend the canopy assembly to the shell 50.

[00109] The front edge of the canopy assembly 80 comprises a canopy ridge 86 extending therealong, to prevent material which lands on the canopy panel 82 from falling over this front edge. This canopy ridge 86 is illustrated in further detail in Figure 33.

[001 10] Each of the side edges of the canopy assembly comprises rock deflectors 88 extending therealong. One of these rock deflectors 88 is illustrated in further detail in Figure 34. The canopy panel 82 is highest at its centre and falls away towards each side so as to encourage any material which falls thereon to slide or roll off one of the sides of the canopy assembly 80 via one of these rock deflectors 88.

[00111] The canopy assembly 80 may be covered with a skin of polyurethane, for protection and impact absorption. [00112] For a 150 tonne haul truck a dump tray according to the present invention will weigh less than 10 tonnes, compared with 22 tonnes for a conventional dump tray. This results in a commensurate payload increase for the haul truck, and wear and fuel saving when unladen.

[001 13] Throughout the specification and the claims that follow, unless the context requires otherwise, the words“comprise” and“include” and variations such as“comprising” and“including” will be understood to imply the inclusion of a stated integer or group of integers, but not the exclusion of any other integer or group of integers.

[00114] The reference to any prior art in this specification is not, and should not be taken as, an acknowledgement of any form of suggestion that such prior art forms part of the common general knowledge.

[00115] It will be appreciated by those skilled in the art that the invention is not restricted in its use to the particular application described. Neither is the present invention restricted in its preferred embodiment with regard to the particular elements and/or features described or depicted herein. It will be appreciated that the invention is not limited to the embodiment or embodiments disclosed, but is capable of numerous rearrangements, modifications and substitutions without departing from the scope of the invention as set forth and defined by the following claims.




 
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