GB2072136A - Altering the operating geometry of diggers and loaders - Google Patents

Altering the operating geometry of diggers and loaders Download PDF

Info

Publication number
GB2072136A
GB2072136A GB7929697A GB7929697A GB2072136A GB 2072136 A GB2072136 A GB 2072136A GB 7929697 A GB7929697 A GB 7929697A GB 7929697 A GB7929697 A GB 7929697A GB 2072136 A GB2072136 A GB 2072136A
Authority
GB
United Kingdom
Prior art keywords
ram
geometry
swing
altering
link
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
GB7929697A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Millar G M
Original Assignee
Millar G M
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Millar G M filed Critical Millar G M
Priority to GB7929697A priority Critical patent/GB2072136A/en
Publication of GB2072136A publication Critical patent/GB2072136A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/30—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets with a dipper-arm pivoted on a cantilever beam, i.e. boom
    • E02F3/302—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets with a dipper-arm pivoted on a cantilever beam, i.e. boom with an additional link
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/30—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets with a dipper-arm pivoted on a cantilever beam, i.e. boom
    • E02F3/32—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets with a dipper-arm pivoted on a cantilever beam, i.e. boom working downwardly and towards the machine, e.g. with backhoes

Abstract

A digger has an arm pivoted at 7 on a kingpost assembly 16 mounted for slewing on a king-pin 14 carried by a tractor. In the position shown in full lines the arm can be luffed by a main ram 3 pivoted at its rod end on the arm at 5 and pivoted at its cylinder end at 9 on a swing link 13 itself pivoted at 11 on the kingpost assembly 16. The main ram can be moved to the position 4, shown in broken lines, by extension of a geometry altering ram 15 pivoted at 8 to the kingpost assembly and at 9 to the swing link 13, (the pivot points 5, 9 of the main ram being then shown as 6, 10 respectively). A loader, Fig. 2 (not shown) may have the geometry of its bucket tilting mechanism similarly altered. <IMAGE>

Description

SPECIFICATION Gordon geometry-altering hydraulic lifting device This Invention relates to Hydraulicaily-operated and tractor or vehicle mounted diggers and loaders.
According to the present Invention, I provide for the base of the lifting geometry to be capable of being lengthened or shortened at will and under the control of the machine operator by means of an hydraulic ram which now forms part of the base of the base of the lifting triangle, having in diggers the ram butt preferably articulating from a point near to or integral with the swing-up point of the first moving arm or boom, and the ram pushrod preferably articulating from and integral with the butt of the digger's main lifting ram. Viceversa in the case of a loader, the geometry altering ram's lower end now near to or integral with the loader's main lifting ram butt and its push-rod preferably integral with the first moving arm or boom.
Assuming that such mechanisms -- digger or loader -- slew by means of some hydraulic device and swinging from a king-pin, and this forms part of a king-post from which both the boom and main lifting ram articulate, my Invention provides for the geometry-altering ram to be built in to the king-post. In a digger, as the geometry-altering ram extends, and as its butt is allowed to pivot slightly, so the geometry-altering ram rod moves nearly vertically upwards taking the main lifting ram butt with it, both articulating slightly on their preferably common pin.The geometry-altering ram rod and main lifting ram butt only move nearly upwards because their common attachment pin is common with the outboard - astern - end of a movable, swing, link which has its inboard forward end integral with the king-post and this forward swing point preferably near to or on the vertical axis of the king pin.
In loaders, the configuration is similar, but with the boom in the higher position and the main lifting ram butt in the lower.
In an embodiment of the Invention which will now be described by way of example, it is desired that a digger lift a full bucketful of earth, the digger in the fully lowered position of approximately 40 degrees down from the horizontal, bucket and dipper - or second moving arm -- totally lowered into a trench or hole in the ground.
Should some stone or other obstruction resist the main lifting ram's effort - and as this ram is sited normally above the boom as above explained with ram then endeavouring to lift on the pull-stroke of its piston and thus at a comparative disadvantage - the geometry-altering ram is then extended on the push-stroke of its piston; taking the butt of the main lifting ram - still fully or nearly fully extended -- with it and both swinging upwards on the swing-link, so the entire digging mechanism of both arms and bucketful are lifted through an arc of approximately 25 degrees. Thus, both the bucketful of spoil is dislodged as well as the lifting capability of the main lifting ram improved by virtue of now having a longer and so more powerful lifting-geometry base.Retracting then the main lifting ram, geometry-altering ram still extended, the entire mechanism of first plus second moving arms plus bucketful of spoil will be hoisted but through an arc some ten degrees short of maximum; at which point the geometry-altering ran can be retracted and the bucketful hoisted the remaining ten degrees.
If the geometry-altering ram is mounted on a loader, then either a greater weight may be lifted - but to a lesser height - or the same or lesser weight may be hoisted but at a longer reach. As with the digger operation above-described, depressing the geometry-altering ram when the arms are hoisted to power-high, so the arms may be lifted to the maximum height as before.
A second application of the Invention could be altering the power and available arc of a digger's bucket. Such bucket mechanisms are usually operated by means of an hydraulic ram with its rod not acting directly on the bucket but via a separate push-rod, the common articulating-point of which push-rod and ram rod is sited on the outboard end of a swing-link which articulates from a point sited on top of and near to the end of the dipper or second moving arm. The point of articulating attachment of the push-rod-to-bucket can usually be varied by means of removing the securing pin and re-positioning it in another or other pin-holes on the bucket rear member.In this manner, although the swing-link may only pivot through approximately 1 50 degrees, the bucket may be made to articulate through over 200 degrees, depending on the length of the swing-link, and having the push-rod in the weakest -- shortest distance of pin-to-bucket swing point -- pin-hole position on the bucket; in the strongest position on the bucket, the swing-arc of this can be reduced to less than 1 50 degrees, so gearing-up the available tonnage-push of the actuating ram.
In an embodiment of the Invention which will now be described by way of example, instead of the push-rod-to-bucket point being altered, the swing-link is increased in effective length by means of a geometry-altering ram buiit into and integral with it. The geometry-altering ram butt articulating-point is common with the lower, dipper end of the swing-link. The geometryaltering ram's rod is integral with a short swinglink itself articulating from the bucket side of the main swing-link, and it is from near to this point that the push-rod is attached via a pin so allowing a small amount of articulation; the push-rod other end is affixed similarly to a member on the back of the bucket. If the geometry-altering ram is in the retracted position, maximum swing of the main swing-link is achieved with maximum swing-arc imparted to the bucket.If the geometry-altering ram is extended, obliged to swing outward and upward via its small swing-link, then the effective length of the main swing-link is increased, a smaller swing results so decreasing the bucketswing but with a commensurate increase of powder. By lengthening this effective swing-link length, the machine operator can pick and lever at difficult or boulder-locked terrain; then altering the length of stroke, he can increase the bucket articulation and extract the loosened spoil.
A further adaptation of the geometry-altering ram is at the joint of boom-to-dipper -- first-to- second moving arms -- either via an elongating swing-link as at the bucket, or with the geometryaltering ram sited on the second moving arm at its articulating point with the boom. Using this last method, the direct leverage of the dipper's actuating ram can be altered at will by the machine operator to give a greater dipper-arc, but with less power, or larger lifting capacity with less arc.
Fig. 1. Profile view of device fabricated into king-pin of tractor-mounted digger, shown with first moving arm in fully-lowered position and main lifting ram fully extended.
1. First moving arm at 40 degrees down, geometry-altering ram closed.
2. First moving arm at 1 5 degrees down, geometry-altering ram extended.
3. Main lifting ram fully extended, geometryaltering ram closed.
4. Main lifting ram fully extended, geometryaltering ram extended.
5. Articulation point of main lifting ram, rod-tofirst moving arm, geometry-altering ram closed.
6. Articulation point of main lifting ram rod-tofirst moving arm, geometry-altering ram extended.
7. Articulation point of first moving arm-to-king post assembly.
8. Articulation point of geometry-altering ram butt-to-king post assembly.
9. Articulation point of swing-link/main lifting ram butt/geometry-altering ram rod when this ram is closed.
10. Articulation point of swing-link/main lifting ram butt/geometry-altering ram rod when this ram is extended.
11. Articulation point of swing-link-to-king post assembly.
12. Arc described by swing-link under impulse of geometry-altering ram's actuating.
13. Swing-link.
14. King-pin, fabricated into king post assembly.
1 5. Geometry-altering ram.
1 6. Outline of king post assembly.
17. First moving arm at 40 degrees up, main lifting ram closed and geometry-altering ram extended.
18. First moving arm at 50 degrees up, main lifting ram closed and geometry-altering ram closed.
1 9. Arc described by articulation point of first moving arm/main lifting ram rod.
Fig. 2. Profile view of device fabricated into swing-link plus push-rod bucket mechanism of tractor-mounted digger.
20. Dipper arm.
21. Bucket actuating ram, shown at full extension.
22. Articulation point of bucket ram butt-todipper.
23. Articulation point of bucket ram rod/small swing-link/geometry-altering ram rod when this ram is extended.
24. Articulation point of main swing-link-todipper.
25. Outline of main swing-link.
26. Push rod, main swing-link-to-bucket.
27. Articulation point of push rod-to-bucket when this is swung through its minimum arc, geometry-altering ram extended.
28. Articulation point of push rod-to-main swinglink, geometry-altering ram extended.
29. Articulation point of small swing-link-tomain swing-link.
30. Small swing-link.
31. Geometry-altering ram.
32. Articulation point of bucket ram rod/small swing-link/geometry-altering ram rod when this ram is closed.
33. Bucket, shown in position of smallest arc of swing, geometry-altering ram extended.
34. Bucket, shown in position of largest arc of swing, geometry-altering ram closed.
35. Articulation point of push rod-to-main swing--ink, geometry-altering ram closed.
36. Articulation point of push rod -to-bucket when this is swung through its maximum arc, geometry-altering ram closed.
37. Articulation point of bucket ram (when it is closed) rod/small swing-link/geometry-altering ram rod when this ram is closed.
38. Articulation point of bucket ram (when it is closed) rod/small swing-link/geometry-altering ram rod when this ram is extended.
39. Articulation point of push rod-to-bucket when bucket ram is closed and geometry-altering ram is extended.
40. Articulation point of push rod-to-bucket when bucket ram is closed and geometry-altering ram is closed.
41. Arc described by articulation point of bucket ram rod/small swing-link/geometryaltering ram rod when this ram is extended.
42. Arc described by articulation point of bucket ram rod/small swing-link/geometryaltering ram rod when this ram is closed.
43. Arc described by articulating point of push rod-to-bucket.
44. (Solid line) Quadrant limitation of main swing-link when geometry-altering ram is closed.
45. (Broken line) Quadrant limitation of main swing-link when geometry-altering ram is extended.
46. Maximum possible extension of bucket ram rod, arc.
47. Minimum possible retraction of bucket ram rod, arc.
Note - the above two arcs determine as they cross arcs 41 842 the quadrant limitations of the main swing-link.
48. (Solid line) Quadrant limitation of bucket swing when geometry-altering ram is closed.
49. (Broken line) Quadrant limitation of bucket swing when geometry-altering ram is extended.
50. Articulatiny or swing point of bucket-todipper.
51. Arc described by articulation point of bucket ram rod/small swing-link/geometryaltering ram rod.

Claims (5)

CLAIMS A digger or loader, the lifting or actuating geometry triangle-base of which can be altered as follows:
1. Digger or loader: first moving arm to kingpost; the system comprises of a swing-link connected pivotally at its inner end to the kingpost near its top end; and the geometry-altering means pivotally connected to both the king-post, near its lower end, and the swing-link outer end.
2. Digger: bucket to dipper arm; the system comprises of a small swing-link connected pivotally at its inner end to the main bucket swinglink near its top end; and the geometry-altering means pivotally connected to both the main bucket swing-link, near its lower end, and the small swing-link outer end.
3. Digger or loader: first moving arm to second moving arm; as in Claim 1, wherein the first moving arm acts as the king-post or standing part, and the second moving arm acts as the movingaway part; then the geometry-altering means is fabricated into the first moving arm.
4. Digger or loader: first moving arm to second moving arm; as in Claim 3, but with the geometryaltering means fabricated into the second moving arm.
5. Digger or loader: first moving arm to second moving arm; as in Claim 2, wherein the geometryaltering means is fabricated into a swing-link intermediate between the two moving arms.
GB7929697A 1979-08-28 1979-08-28 Altering the operating geometry of diggers and loaders Withdrawn GB2072136A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB7929697A GB2072136A (en) 1979-08-28 1979-08-28 Altering the operating geometry of diggers and loaders

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB7929697A GB2072136A (en) 1979-08-28 1979-08-28 Altering the operating geometry of diggers and loaders

Publications (1)

Publication Number Publication Date
GB2072136A true GB2072136A (en) 1981-09-30

Family

ID=10507445

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7929697A Withdrawn GB2072136A (en) 1979-08-28 1979-08-28 Altering the operating geometry of diggers and loaders

Country Status (1)

Country Link
GB (1) GB2072136A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996033315A1 (en) * 1995-04-21 1996-10-24 Emlyn Thomas Evans Lift boom linkage system
EP1566488A2 (en) * 2004-02-19 2005-08-24 Fiat Kobelco Construction Machinery S.p.A. Excavator arm linkage
EP3620580A1 (en) * 2018-09-06 2020-03-11 Takeuchi Mfg. Co., Ltd. Working device

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996033315A1 (en) * 1995-04-21 1996-10-24 Emlyn Thomas Evans Lift boom linkage system
GB2299979B (en) * 1995-04-21 1998-12-30 Emlyn Thomas Evans Mechanical handling apparatus
EP1566488A2 (en) * 2004-02-19 2005-08-24 Fiat Kobelco Construction Machinery S.p.A. Excavator arm linkage
EP1566488A3 (en) * 2004-02-19 2011-11-23 New Holland Kobelco Construction Machinery S.p.A. Excavator arm linkage
EP3620580A1 (en) * 2018-09-06 2020-03-11 Takeuchi Mfg. Co., Ltd. Working device
US10640948B2 (en) 2018-09-06 2020-05-05 Takeuchi Mfg. Co., Ltd. Working device

Similar Documents

Publication Publication Date Title
US4248471A (en) Backhoe grapple assembly
US2482612A (en) Shovel loader
US5499463A (en) Power shovel with variable pitch braces
US3411647A (en) Boom assembly for tractor loader
US4103791A (en) Shovel attachment means for hydraulic excavator
US6325589B1 (en) Loader with a controlled vertical path of a working implement
JPH08302747A (en) Heavily equipped operating device having automatic horizontal adjustment fuction of attachment
US4150504A (en) Stabilized digging mechanism
US4142308A (en) Linkage mechanism for digging implement
US4272222A (en) Boom apparatus
US5595471A (en) Linkage arrangement
US4818005A (en) Grapple with powered top and bottom jaw
US3184085A (en) Telescoping hoe boom
GB2072136A (en) Altering the operating geometry of diggers and loaders
US4316697A (en) Front-loading hydraulic excavator
US3120315A (en) Scoop loader attachment
US5176491A (en) Overcenter backhoe apparatus
US4143778A (en) Shovel attachment means for hydraulic excavator
US3203564A (en) Front end and overshot loader
US4859138A (en) Boom for a vehicle including folding linkage between boom parts
US2870924A (en) Bucket and bucket arm control for booms
US4271613A (en) Excavator with articulated arms
US3175711A (en) Tractor loaders
US3451151A (en) Bucket ejector assembly for an excavating grab
US3627156A (en) Torque balancing linkage for excavator dipper sticks

Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)