STRAIGHT TAPER DIPPER
A dipper having an inlet and an outlet, and an inlet reference plane being defined at the inlet. The dipper includes a front wall and an opposite back wall extending between the inlet and the outlet. A front wall reference plane extends from the inlet to the outlet and is positioned between the front wall and the back wall. The dipper further includes two side walls connected between the front wall and the back wall and extending between the inlet and the outlet. The inlet has an inlet area in the inlet reference plane, wherein the outlet has an outlet area in an outlet reference plane substantially parallel to the inlet reference plane. The front wall, the back wall, and the two side walls are arranged such that the outlet area is at least 3 percent and no more than 25 percent greater than the inlet area.
This application claims the benefit of U.S. Provisional Patent Application No. 61/481,615, filed May 2, 2011, the entire contents of which are hereby incorporated by reference.
FIELDThe present invention generally relates to dippers for surface mining.
SUMMARYTypical power shovels or excavators use a bucket or dipper assembly to scoop earthen material from horizontal or vertical faces. A conventional power shovel has a boom, and the dipper is mounted on the boom via a crowd mechanism. The crowd mechanism includes a crowd pinion on the boom, and crowd rack as part of the dipper handle which pivots about the pinion and which moves translationally along the pinion. The dipper is mounted on the end of the handle. The bucket or dipper is normally provided with sharp teeth to provide a digging action against the surface being worked and further includes a cavity for collecting the material so removed. Once the earthen material is received within the dipper, the dipper is typically moved to another location for transfer of the material. The material is usually discharged into a dump truck, onto a conveyor, or merely onto a pile.
In one independent embodiment, a dipper has an inlet and an outlet and includes a front wall and an opposite back wall extending between the inlet and the outlet. A first reference plane extends from the inlet to the outlet and is positioned between the front wall and the back wall. The front wall may have a substantially linear inner surface and may be arranged relative to the first reference plane at an angle of at least 0 degrees and no more than 3 degrees. The dipper further includes two side walls connected between the front wall and the back wall and extending between the inlet and the outlet. A second reference plane extends from the inlet to the outlet and is positioned between the side walls. A lip is coupled to at least the front wall and extends outwardly from the inlet. The back wall may taper outwardly relative to the first reference plane from the inlet toward the outlet at an angle greater than 0 degrees and no more than 30 degrees, and each of the side walls may taper outwardly relative to the second reference plane from the inlet toward the outlet at an angle greater than 0 degrees and no more than 30 degrees.
In another independent embodiment of a dipper, each of the side walls of the dipper may taper outwardly relative to the second reference plane from the inlet toward the outlet at an angle greater than 0 degrees and no more than 30 degrees. The lip has opposite side surfaces, and each of the side surfaces of the lip may taper outwardly relative to the second reference plane from the inlet toward the outer surface at an angle greater than 0 degrees and no more than 30 degrees.
In yet another independent embodiment of the dipper, an inlet reference plane is defined at the inlet, and a front wall reference plane extends from the inlet to the outlet and is positioned between the front wall and the back wall. The front wall may have a substantially linear inner surface and be arranged relative to the front wall reference plane at an angle of at least 0 degrees and no more than 3 degrees. The inlet has an inlet area in the inlet reference plane, and the outlet has an outlet area in an outlet reference plane substantially parallel to the inlet reference plane. The front wall, the back wall, and the two side walls may be arranged such that the outlet area is at least 3 percent and no more than 25 percent greater than the inlet area.
Other independent aspects of the invention will become apparent by consideration of the detailed description and accompanying drawings.
Before any independent embodiments of the invention are explained in detail, it is to be understood that the invention is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the following drawings. The invention is capable of other independent embodiments and of being practiced or of being carried out in various ways.
With reference to
The right side wall 24 defines (see
The left lip plane 60 is arranged at a left lip angle 64 with respect to the side wall reference plane 40. The left lip angle 64 may be between about zero degrees and about thirty degrees (0°≦x≦30°). In some embodiments, the left lip angle 64 is between about one degree and about ten degrees (1°≦x≦10°). In the illustrated embodiment, the left lip angle 64 is about zero degrees (0°).
The right lip plane 68 is arranged at a right lip angle 72 with respect to the side wall reference plane 40. The right lip angle 72 may be between about zero degrees and about thirty degrees (0°≦x≦30°). In some embodiments, the right lip angle 72 is between about one degree and about ten degrees (1°≦x≦10°). In the illustrated embodiment, the right lip angle 72 is about zero degrees (0°).
Further, in some embodiments, the lip 36 may be arranged with the outer dimension 56 of the lip 36 larger than a comparative outer dimension at the outlet 32 of the dipper 10 so that the outlet 32 or heel 38 of the dipper 10 does not plow or rake though the material being mined, which would increase the wear on the dipper 10 and increase the force required to move the dipper 10 through the material. The left and right lip angles 64, 72 affect the outer dimension 56 and can be manipulated to provide clearance for the outlet 32, as desired.
With respect to
The front wall 14 defines a straight surface from the inlet 28 to the outlet 32 (as shown in
In the illustrated embodiment (see
The back wall 18 defines (see
With continued reference to
An outlet plane 108 is defined parallel to the inlet plane 100 (and generally perpendicular to the floor reference plane 76) at the outlet 32. An outlet area 112 for the dipper 10 (e.g., at the door) is defined in the outlet plane 108. That is to say, the front wall 14, the back wall 18, the left side wall 22, and the right side wall 26 define an outlet perimeter in the outlet plane 108, and the area within the outlet perimeter defines the outlet area 112 in the outlet plane 108.
As a result of arrangement of the front wall 14, the back wall 18, the left side wall 22, and the right side wall 24, the outlet area 112 is larger than the inlet area 104 (see
The inventive arrangement provides a dipper 10 that improves performance in digging. For example, the dipper 10 may have improved fill, dump and/or full/dump cycle time. The dipper 10 may have reduced drag during digging.
The dipper 10 may be advantageous for oil sands digging. Oil sands expand after being unearthed. The increased volume of the dipper 10 toward the outlet 32 of the dipper 10 allows the oil sands to expand within the dipper 10 while a digging action is occurring, and the oil sands will not be compacted within the dipper 10. Typically, oil sands expand about four percent (4%) in volume during a digging action (e.g., 30 seconds). The straight tapered design of the dipper 10 allows expansion without compaction and/or improves digging characteristics and efficiency. The dipper 10 may also be used to remove/mine other materials, such as, for example, copper, iron ore, overburden material, etc.
Claims
1. A dipper having an inlet and an outlet, the dipper comprising:
- a front wall and an opposite back wall extending between the inlet and the outlet, a first reference plane extending from the inlet to the outlet and positioned between the front wall and the back wall, the front wall having a substantially linear inner surface, the front wall being arranged relative to the first reference plane at an angle of at least about 0 degrees and no more than about 3 degrees from the inlet toward the outlet
- two side walls connected between the front wall and the back wall and extending between the inlet and the outlet, a second reference plane extending from the inlet to the outlet and positioned between the side walls; and
- a lip coupled to at least the front wall and extending outwardly from the inlet;
- wherein at least one of the back wall tapers outwardly relative to the first reference plane from the inlet toward the outlet at an angle greater than about 0 degrees and no more than about 30 degrees, and each of the side walls tapers outwardly relative to the second reference plane from the inlet toward the outlet at an angle greater than about 0 degrees and no more than about 30 degrees.
2. The dipper of claim 1, wherein the front wall is arranged relative to the first reference plane at an angle of about 0 degrees.
3. The dipper of claim 1, wherein the back wall tapers outwardly relative to the first reference plane from the inlet toward the outlet at an angle greater than about 1 degree and no more than about 10 degrees.
4. The dipper of claim 3, wherein the back wall tapers outwardly relative to the first reference plane from the inlet toward the outlet at an angle of about 5 degrees.
5. The dipper of claim 1, wherein each of the side walls tapers outwardly relative to the second reference plane from the inlet toward the outlet at an angle greater than about 1 degree and no more than about 10 degrees.
6. The dipper of claim 5, wherein each of the side walls tapers outwardly relative to the second reference plane from the inlet toward the outlet at an angle of about 3 degrees.
7. The dipper of claim 1, wherein the lip defines opposite side surfaces, each of the side surfaces tapering outwardly relative to the second reference plane from the inlet toward the outer surface at an angle greater than about 0 degrees and no more than about 30 degrees.
8. The dipper of claim 7, wherein the lip defines opposite side surfaces, each of the side surfaces tapering outwardly relative to the second reference plane from the inlet toward the outer surface at an angle greater than about 1 degree and no more than about 10 degrees.
9. The dipper of claim 1, wherein the lip defines opposite side surfaces, each of the side surfaces tapering outwardly relative to the second reference plane from the inlet toward the outer surface at an angle of about 0 degrees.
10. The dipper of claim 1, wherein the front wall is curved in a plane tangential to the first reference plane.
11. A dipper having an inlet and an outlet, the dipper comprising:
- a front wall and an opposite back wall extending between the inlet and the outlet;
- two side walls connected between the front wall and the back wall and extending between the inlet and the outlet, a reference plane extending from the inlet to the outlet and positioned between the side walls, each of the side walls tapering outwardly relative to the reference plane from the inlet toward the outlet at an angle greater than about 0 degrees and no more than about 30 degrees; and
- a lip coupled to at least the front wall and extending outwardly from the inlet to an outer surface, the lip having opposite side surfaces, each of the side surfaces tapering outwardly relative to the reference plane from the inlet toward the outer surface at an angle greater than about 0 degrees and no more than about 30 degrees.
12. The dipper of claim 11, wherein each of the side walls tapers outwardly relative to the reference plane from the inlet toward the outlet at an angle greater than about 1 degree and no more than about 10 degrees.
13. The dipper of claim 12, wherein each of the side walls tapers outwardly relative to the reference plane from the inlet toward the outlet at an angle of about 3 degrees.
14. The dipper of claim 11, wherein each of the side surfaces taper outwardly relative to the reference plane from the inlet toward the outer surface at an angle greater than about 1 degree and no more than about 10 degrees.
15. The dipper of claim 14, wherein each of the side surfaces taper outwardly relative to the reference plane from the inlet toward the outer surface at an angle of about 0 degrees.
16. The dipper of claim 11, wherein another reference plane extends from the inlet to the outlet and is positioned between the front wall and the back wall, and wherein the front wall is arranged relative to the other reference plane at an angle of at least about 0 degrees and no more than about 3 degrees from the inlet toward the outlet.
17. The dipper of claim 16, wherein the front wall is arranged relative to the other reference plane at an angle of at about 0 degrees.
18. The dipper of claim 11, wherein the front wall is curved in a plane tangential to the other reference plane.
19. The dipper of claim 11, wherein the back wall tapers outwardly relative to the other reference plane from the inlet toward the outlet at an angle greater than about 0 degrees and no more than about 30 degrees.
20. The dipper of claim 19, wherein the back wall tapers outwardly relative to the other reference plane from the inlet toward the outlet at an angle greater than about 1 degree and no more than about 10 degrees.
21. The dipper of claim 20, wherein the back wall tapers outwardly relative to the other reference plane from the inlet toward the outlet at an angle of about 5 degrees.
22. A dipper having an inlet and an outlet, an inlet reference plane being defined at the inlet, the dipper comprising:
- a front wall and an opposite back wall extending between the inlet and the outlet, a front wall reference plane extending from the inlet to the outlet and positioned between the front wall and the back wall, the front wall having a substantially linear inner surface, the front wall being arranged relative to the front wall reference plane at an angle of at least about 0 degrees and no more than about 3 degrees from the inlet toward the outlet;
- two side walls connected between the front wall and the back wall and extending between the inlet and the outlet; and
- a lip coupled to at least the front wall and extending outwardly from the inlet;
- wherein the inlet has an inlet area in the inlet reference plane, wherein the outlet has an outlet area in an outlet reference plane substantially parallel to the inlet reference plane, and wherein the front wall, the back wall, and the two side walls are arranged such that the outlet area is at least about 3 percent and no more than about 25 percent greater than the inlet area.
23. The dipper of claim 22, wherein the outlet area is at least about 8 percent and no more than about 9 percent greater than the inlet area.
24. The dipper of claim 23, wherein the outlet area is at least about 10 percent greater than the inlet area.
Type: Application
Filed: Apr 20, 2012
Publication Date: Nov 8, 2012
Inventors: Dan Feld (South Milwaukee, WI), Richard Nicoson (Hartford, WI), William R. Powers (Mukwonago, WI)
Application Number: 13/452,380
International Classification: E02F 3/40 (20060101);