CA1236053A - Earth working machine - Google Patents
Earth working machineInfo
- Publication number
- CA1236053A CA1236053A CA000458892A CA458892A CA1236053A CA 1236053 A CA1236053 A CA 1236053A CA 000458892 A CA000458892 A CA 000458892A CA 458892 A CA458892 A CA 458892A CA 1236053 A CA1236053 A CA 1236053A
- Authority
- CA
- Canada
- Prior art keywords
- machine
- chassis
- controls
- boom
- operator
- 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.)
- Expired
Links
Abstract
Title: "EARTH-WORKING MACHINE"
ABSTRACT
A skid-steer earth-moving machine (10) has a tool mounting head (20) supported on a pair of lifting arms (18), the altitude of the head (20) being controlled by a stabilizing linkage (23). A bucket (27) or other earth-working tool may be mounted on the head (20), controlled by a ram (29). A footplate (13) is mounted on the rear of the machine (10) to support an operator who controls the operation of the machine using "deadman's" controls (32-34).
ABSTRACT
A skid-steer earth-moving machine (10) has a tool mounting head (20) supported on a pair of lifting arms (18), the altitude of the head (20) being controlled by a stabilizing linkage (23). A bucket (27) or other earth-working tool may be mounted on the head (20), controlled by a ram (29). A footplate (13) is mounted on the rear of the machine (10) to support an operator who controls the operation of the machine using "deadman's" controls (32-34).
Description
~3~ i3 Title: "EARTH-WORKING MACHINE"
BACKGROUND OF TH~ INVENTION
(1) Field of the Invention This invention relates to an earth-worklng machine.
The invention is particularly useful as a mini-loader which can be operated in restricted areas.
BACKGROUND OF TH~ INVENTION
(1) Field of the Invention This invention relates to an earth-worklng machine.
The invention is particularly useful as a mini-loader which can be operated in restricted areas.
(2) Brief Description o~ the Prior Art Small front-end loaders of the types sold under the Registered Trade Marks "Bobcat" -(Clark ~quipment Co.) and "Mustang" have found ready acceptance in earth-moving applications. However, these loaders; are often too large to be used e.g. in domestic gardens or horse stables where only restricted access is available via narrow gate - or doorways. In these installations, any soil, manure, rubbish, or thè like must be removed by wheelbarrow.
SUMMARY OF THE PRESENT INVENTION
It is an object of the present invention to provide an earth-working machine which is very compact yet capable of carryïng out a ~ide ran2e of tasks.
It is a preferred object to provide a machine which is highly manoeuvrable and easily controllable.
It is a further preferred object to provide a machine which can be operated by an operator who may stand on a footplate at the rear of the machine or who m~y walk behind the machine.
It is a still further preferred object to provide a machine with safety (or"deadman's") controls so that the machine will stop if the operator s~ould fall from the machine.
` Other preferred objects of the present invention will become apparent from the following description.
In one aspect, the invention is directed to a skid -steer earth working machine including:
a chassis;
a pair of driven wheels, on a track, supporting the chassis at each side;
driven means for the wheels or tracks;
a boom pivotally mounted on -the chassis;
means to raise or lower the boom; and - 2 ~ 3 a buc]cet or other earth moving tool on the boom characterised in that the boom is mounted on pivots at a poin~ over the rear of the chassis with a suppo~t for a stan~ing operator bein~ provided at the rear of the ~5 chassis directly behind the boo~ pivot point, which sup-~ort includes a foot plate below the tops of the wheels - or tracks, and controls operable to control the operation of the machine being positioned with the boom pivot point at substantlally waist height to give a s~anding operator a free`fo~wardly and downwardly angled field of view of the buc~et~o~ other earthmoving tool at the lowermost point of boom.
.. . ..
- Preferably the machine has four wheels arranged in two pairs connected together to provide skid-steer drive and steering for the machine. Preferably one of each pair` of wheels is driven by a hydraulic motor and is connected to the other wheel of the pair of a chain-and-sprocket drive.
Preferably each hydraulic motor is driven by a co.mon hydraulic pump driven by a consta~t speed internal combustion engine, the motors being individually controlled by control levers and valves to provide the skid-steer drive and steering.
Preferably the boom has a pair of substantially 25` parallel lifting arms, pivotally mounted adjacent the rear of the chassis, raised and lowered by respective hydraulic rams P~r`eferably a tool mounting head is mounted on the forward end of the boom and is provided with a stabilizing link~ge which provides a parallelogram type linkage between the chassis and the head to maintain the altitude of the ~head to the chassis as the boom is raisçd and lowered~
Preferably the earth moving tool e.g. a bucket, platform, ripping tool or the like is pivotally mounted on the head and pivotally movable relative thereto by a hydraulic ram.
Preferably the controls are mounted at the rear of the chassis and are self-centering, providing "deadman's"
controls stopping the machine if the operator should fall off the machine or fall over.
~3~3 BRIEF DESCRIPTION OF THE DRAWINGS
To enable the invention to be fully understood, a preferred embodiment will now be described with reference to the accompanying drawings, in which:
FIG. 1 is a side view of the machine arranged as a front-end loader with the boom lowered;
FIG. 2 is a similar view but with the boom raised and the bucket lowered to a discharge position;
FIG. 3 is a rear view of the machine;
FIG. 4 is a side view of a post-hole digger attached to the machine;
FIG. 5 is a perspective view of a load-carry platform attachment for the machine; and FIG. 6 is a side view of a forklift attachment attached to the machine.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
The loader 10 has a chassis 11 provided with body sides 12 which are triangular in side view, the body sides having panels within a tubular steel frame. A footplate 13 extends rearwardly from the chassis to provide a support for the operator.
The chassis is supported at each corner on ground wheels l4, fitted with pneumatic tyres 15, notably mounted on stub axles 16. The front axles are driven by respective hydraulic motors (not shown), the motors being driven by a hydraulic pump (also not shown) driven by a constant speed petrol engine 17. Chains and sprockets 16a connect the pairs of wheels 14 on each side to provide a skid-steer drive and steering arrangement for the loader.
A pair of lifting arms 18 are pivotally mounted at the apex of the body sides 12 at the rear of the loader.
The forward ends of the arms are interconnected by a trans-verse shaft 19 on which is pivotally mounted a tool mount-ing head 20. The head 20 has a pair of upright parallel arms 21 pivotally mounted at their lower ends on the shaft 5~
19 and connected at their upper ends by a shaft 22.
A stabilizing linkage 23 is pivotally mounted at its rear end on a post 24 above the apex of the body sides The forward end of the linkage 23 is pivotally connected to the parallel arms 21, by a pin 25, to provide a parallelogram arrangement to maintain the altitude of the tool mounting head 20 to the chassis 11 as the lifting arms 18 are raised and lowered by respective hydraulic rams 26 mounted on the body sides 12.
A bucket 27 has a pair of rearward lugs 28 pivot-ally mounted on the shaft 19. The altitude of the bucket 27 to the tool head 20 is controlled by a hydraulic ram 29 connected at one end to pin 22 and at the other end to a central lug 30, on the rear of the bucket.
A pair of L-shaped grab handles 31 are provided at the rear of the loader. A respective lever 32 on each side controls the drive to the wheels 15 on that side.
One lever 33 controls the rams 26 to raise and lower the lifting arms, while the other lever 34 controls the ram 29 which tilts the bucket 27 relative to the tool head 20.
All the levers are self-centering to provide "deadman's"
controls for the loader.
In use, the operator may ride on the foot plate 13 or walk behind the loader. By op-erating the levers 32 he can drive and steer the loader and by operating levers 33 and 34 he can control the operation of the bucket 27.
Referring to FIG. 4, a post-hole digger attachment 35 is shown mounted on the tool mounting head 20. The attachment has a tool bar 36 with a pair of rearward lugs 37 pivotally mounted on the shaft 19 and a central lug pivotally connected to the hydraulic ram 29.
A pair of brackets 39 extend forwardly of the tool bar 36 and support a hydraulic motor 40 on pivob pins 41. The motor 40 is driven from the hydraulic pump on the machine via hydraulic hoses ~2.
~2~ 3 An auger 43, having a spiral flyte 44 around a central shaft 45, is connected to the motor 40 to drill down through the soil, the depth of the hole drilled being controlled by the rams 26, the auger 46 being maintained vertical by the hydraulic ram 29.
FIG. 5 shows a li~ting platform 46 which may be fitted to the tool mounting head, suitable mounting lugs (not shown) being provided on the upright support frame 47.
Referring now to FIG. 6, a pair of lifting forks 48 may be mounted on a modified form 49 of the tool bar 36 of FIG. 4. As shown, the forks may be used to trans-port pallets 50 or the like supporting e.g. oil drums 51 or waste containers.
Other possible uses are for cleaning out stables, in market gardens and vineyards and for plumbers and drainers.
The loader is extremely compact and may be driven through standard 820mm gates and so is useful for the 2~ home gardener or landscaper. The loader has the ability of the "Bobcat" (Registered Trade Mark) type machines, albeit with a small capacity, but with the added flexib-ility of its compact size.
Various changes and modifications may be made to ~5 the embodiment described without departing from the scope of the present invention as defined in the appended claims.
3o
SUMMARY OF THE PRESENT INVENTION
It is an object of the present invention to provide an earth-working machine which is very compact yet capable of carryïng out a ~ide ran2e of tasks.
It is a preferred object to provide a machine which is highly manoeuvrable and easily controllable.
It is a further preferred object to provide a machine which can be operated by an operator who may stand on a footplate at the rear of the machine or who m~y walk behind the machine.
It is a still further preferred object to provide a machine with safety (or"deadman's") controls so that the machine will stop if the operator s~ould fall from the machine.
` Other preferred objects of the present invention will become apparent from the following description.
In one aspect, the invention is directed to a skid -steer earth working machine including:
a chassis;
a pair of driven wheels, on a track, supporting the chassis at each side;
driven means for the wheels or tracks;
a boom pivotally mounted on -the chassis;
means to raise or lower the boom; and - 2 ~ 3 a buc]cet or other earth moving tool on the boom characterised in that the boom is mounted on pivots at a poin~ over the rear of the chassis with a suppo~t for a stan~ing operator bein~ provided at the rear of the ~5 chassis directly behind the boo~ pivot point, which sup-~ort includes a foot plate below the tops of the wheels - or tracks, and controls operable to control the operation of the machine being positioned with the boom pivot point at substantlally waist height to give a s~anding operator a free`fo~wardly and downwardly angled field of view of the buc~et~o~ other earthmoving tool at the lowermost point of boom.
.. . ..
- Preferably the machine has four wheels arranged in two pairs connected together to provide skid-steer drive and steering for the machine. Preferably one of each pair` of wheels is driven by a hydraulic motor and is connected to the other wheel of the pair of a chain-and-sprocket drive.
Preferably each hydraulic motor is driven by a co.mon hydraulic pump driven by a consta~t speed internal combustion engine, the motors being individually controlled by control levers and valves to provide the skid-steer drive and steering.
Preferably the boom has a pair of substantially 25` parallel lifting arms, pivotally mounted adjacent the rear of the chassis, raised and lowered by respective hydraulic rams P~r`eferably a tool mounting head is mounted on the forward end of the boom and is provided with a stabilizing link~ge which provides a parallelogram type linkage between the chassis and the head to maintain the altitude of the ~head to the chassis as the boom is raisçd and lowered~
Preferably the earth moving tool e.g. a bucket, platform, ripping tool or the like is pivotally mounted on the head and pivotally movable relative thereto by a hydraulic ram.
Preferably the controls are mounted at the rear of the chassis and are self-centering, providing "deadman's"
controls stopping the machine if the operator should fall off the machine or fall over.
~3~3 BRIEF DESCRIPTION OF THE DRAWINGS
To enable the invention to be fully understood, a preferred embodiment will now be described with reference to the accompanying drawings, in which:
FIG. 1 is a side view of the machine arranged as a front-end loader with the boom lowered;
FIG. 2 is a similar view but with the boom raised and the bucket lowered to a discharge position;
FIG. 3 is a rear view of the machine;
FIG. 4 is a side view of a post-hole digger attached to the machine;
FIG. 5 is a perspective view of a load-carry platform attachment for the machine; and FIG. 6 is a side view of a forklift attachment attached to the machine.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
The loader 10 has a chassis 11 provided with body sides 12 which are triangular in side view, the body sides having panels within a tubular steel frame. A footplate 13 extends rearwardly from the chassis to provide a support for the operator.
The chassis is supported at each corner on ground wheels l4, fitted with pneumatic tyres 15, notably mounted on stub axles 16. The front axles are driven by respective hydraulic motors (not shown), the motors being driven by a hydraulic pump (also not shown) driven by a constant speed petrol engine 17. Chains and sprockets 16a connect the pairs of wheels 14 on each side to provide a skid-steer drive and steering arrangement for the loader.
A pair of lifting arms 18 are pivotally mounted at the apex of the body sides 12 at the rear of the loader.
The forward ends of the arms are interconnected by a trans-verse shaft 19 on which is pivotally mounted a tool mount-ing head 20. The head 20 has a pair of upright parallel arms 21 pivotally mounted at their lower ends on the shaft 5~
19 and connected at their upper ends by a shaft 22.
A stabilizing linkage 23 is pivotally mounted at its rear end on a post 24 above the apex of the body sides The forward end of the linkage 23 is pivotally connected to the parallel arms 21, by a pin 25, to provide a parallelogram arrangement to maintain the altitude of the tool mounting head 20 to the chassis 11 as the lifting arms 18 are raised and lowered by respective hydraulic rams 26 mounted on the body sides 12.
A bucket 27 has a pair of rearward lugs 28 pivot-ally mounted on the shaft 19. The altitude of the bucket 27 to the tool head 20 is controlled by a hydraulic ram 29 connected at one end to pin 22 and at the other end to a central lug 30, on the rear of the bucket.
A pair of L-shaped grab handles 31 are provided at the rear of the loader. A respective lever 32 on each side controls the drive to the wheels 15 on that side.
One lever 33 controls the rams 26 to raise and lower the lifting arms, while the other lever 34 controls the ram 29 which tilts the bucket 27 relative to the tool head 20.
All the levers are self-centering to provide "deadman's"
controls for the loader.
In use, the operator may ride on the foot plate 13 or walk behind the loader. By op-erating the levers 32 he can drive and steer the loader and by operating levers 33 and 34 he can control the operation of the bucket 27.
Referring to FIG. 4, a post-hole digger attachment 35 is shown mounted on the tool mounting head 20. The attachment has a tool bar 36 with a pair of rearward lugs 37 pivotally mounted on the shaft 19 and a central lug pivotally connected to the hydraulic ram 29.
A pair of brackets 39 extend forwardly of the tool bar 36 and support a hydraulic motor 40 on pivob pins 41. The motor 40 is driven from the hydraulic pump on the machine via hydraulic hoses ~2.
~2~ 3 An auger 43, having a spiral flyte 44 around a central shaft 45, is connected to the motor 40 to drill down through the soil, the depth of the hole drilled being controlled by the rams 26, the auger 46 being maintained vertical by the hydraulic ram 29.
FIG. 5 shows a li~ting platform 46 which may be fitted to the tool mounting head, suitable mounting lugs (not shown) being provided on the upright support frame 47.
Referring now to FIG. 6, a pair of lifting forks 48 may be mounted on a modified form 49 of the tool bar 36 of FIG. 4. As shown, the forks may be used to trans-port pallets 50 or the like supporting e.g. oil drums 51 or waste containers.
Other possible uses are for cleaning out stables, in market gardens and vineyards and for plumbers and drainers.
The loader is extremely compact and may be driven through standard 820mm gates and so is useful for the 2~ home gardener or landscaper. The loader has the ability of the "Bobcat" (Registered Trade Mark) type machines, albeit with a small capacity, but with the added flexib-ility of its compact size.
Various changes and modifications may be made to ~5 the embodiment described without departing from the scope of the present invention as defined in the appended claims.
3o
Claims (6)
1. A skid steer earth working machine including:
a chassis;
a pair of driven wheels, on a track, supporting the chassis at each side;
driven means for the wheels or tracks;
a boom pivotally mounted on the chassis;
means to raise or lower the boom; and a bucket or other earth moving tool on the boom characterised in that the boom is mounted on pivots at a point over the rear of the chassis with a support for a standing operator being provided at the rear of the chassis directly behind the boom pivot point, which support includes a foot plate below the tops of the wheels or tracks, and controls operable to control the operation of the machine being positioned with the boom pivot point at substantially waist height to give a standing operator a free forwardly and downwardly angled field of view of the bucket or other earthmoving tool at the lowermost point of boom.
a chassis;
a pair of driven wheels, on a track, supporting the chassis at each side;
driven means for the wheels or tracks;
a boom pivotally mounted on the chassis;
means to raise or lower the boom; and a bucket or other earth moving tool on the boom characterised in that the boom is mounted on pivots at a point over the rear of the chassis with a support for a standing operator being provided at the rear of the chassis directly behind the boom pivot point, which support includes a foot plate below the tops of the wheels or tracks, and controls operable to control the operation of the machine being positioned with the boom pivot point at substantially waist height to give a standing operator a free forwardly and downwardly angled field of view of the bucket or other earthmoving tool at the lowermost point of boom.
2. A machine as claimed in claim 1 wherein:
the machine has two pairs of wheels arranged in two pairs connected together to provide skid-steer drive;
one of each pair of wheels being driven by a hydraulic motor and connected to the other wheel of the pair by a chain and sprocket drive; and each hydraulic motor is driven by a common hydraulic motor driven by an internal combustion engine and controlled by controls levers operated by the operator.
the machine has two pairs of wheels arranged in two pairs connected together to provide skid-steer drive;
one of each pair of wheels being driven by a hydraulic motor and connected to the other wheel of the pair by a chain and sprocket drive; and each hydraulic motor is driven by a common hydraulic motor driven by an internal combustion engine and controlled by controls levers operated by the operator.
3. A machine as claimed in claim 1 wherein:
the boom has a pair of substantially parallel lifting arms pivotally mounted adjacent the rear of the chassis;
at least one hydraulic ram is provided on the chassis to raise and lower the lifting arms;
a tool mounting head is pivotally mounted on the forward end of the lifting arms; and a stabilizing linkage is provided between the chassis and the mounting head to maintain the altitude of the head relative to the chassis as the lifting arms are raised or lowered.
the boom has a pair of substantially parallel lifting arms pivotally mounted adjacent the rear of the chassis;
at least one hydraulic ram is provided on the chassis to raise and lower the lifting arms;
a tool mounting head is pivotally mounted on the forward end of the lifting arms; and a stabilizing linkage is provided between the chassis and the mounting head to maintain the altitude of the head relative to the chassis as the lifting arms are raised or lowered.
4. A machine as claimed in chaim 3 wherein:
an earth-moving or load-carrying tool is pivotally mounted on the mounting head; and a hydraulic ram is provided to pivotally move the tool relative to the head.
an earth-moving or load-carrying tool is pivotally mounted on the mounting head; and a hydraulic ram is provided to pivotally move the tool relative to the head.
5. A machine as claimed in any one of claims 1 to 3 wherein:
the controls are provided at or adjacent the rear of the chassis for operation by an operator standing on the footplate at the rear of the chassis or walking behind the machine, the controls being self-centering and providing "deadman's" controls thereby stopping the machine if the operator should release the controls.
the controls are provided at or adjacent the rear of the chassis for operation by an operator standing on the footplate at the rear of the chassis or walking behind the machine, the controls being self-centering and providing "deadman's" controls thereby stopping the machine if the operator should release the controls.
6. A machine as claimed in any one of claim 4 wherein:
the controls are provided at or adjacent the rear of the chassis for operation by an operator standing on the footplate at the rear of the chassis or walking behind the machine, the controls being self-centering and providing "deadman's" controls thereby stopping the machine if the operator should release the controls.
the controls are provided at or adjacent the rear of the chassis for operation by an operator standing on the footplate at the rear of the chassis or walking behind the machine, the controls being self-centering and providing "deadman's" controls thereby stopping the machine if the operator should release the controls.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000458892A CA1236053A (en) | 1984-07-13 | 1984-07-13 | Earth working machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000458892A CA1236053A (en) | 1984-07-13 | 1984-07-13 | Earth working machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1236053A true CA1236053A (en) | 1988-05-03 |
Family
ID=4128313
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000458892A Expired CA1236053A (en) | 1984-07-13 | 1984-07-13 | Earth working machine |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1236053A (en) |
-
1984
- 1984-07-13 CA CA000458892A patent/CA1236053A/en not_active Expired
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |