Excavating – Snow or ice removing or grooming by portable device – Railway clearer
Patent
1985-07-29
1987-07-14
Crowder, Clifford D.
Excavating
Snow or ice removing or grooming by portable device
Railway clearer
37DIG18, 172 40, E02F 342, E02F 384
Patent
active
046793372
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a material working machine, such as an excavator, loader, breaker, compactor, planer, paver or dredger, to which is, in operation, attached a working tool for working on or in a material, such as earth, while both vibratory and non-vibratory forces are applied thereto.
Known machines of this kind have various disadvantages. Replacement or substitution of a working tool on such a machine is laborious and time-consuming. Known machines are not designed, and consequently not suitable, for continuous working of the tool-carrying part of the machine under water, neither are they designed for universal use, and can therefore usually work with only one type of tool.
The aim of the present invention is to avoid, or at least to mitigate, these and other disadvantages of known machines.
This is achieved according to the invention by a material working machine comprising vibratory means, applying vibratory forces and driven by driving means, and non-vibratory means, applying non-vibratory forces, the machine having vibratory tool carrier means for removable attachment of a working tool, the tool carrier means incorporating first mounting means for its connection to the vibratory means, and second mounting means for its connection to the non-vibratory means, the second mounting means enabling reciprocationg of the tool carrier means at the point of it attachment to the second mounting means when the vibratory means is in operation, the first and second mounting means being spaced from each other in, or substantially in, the direction of said reciprocation.
In a preferred embodiment the driving means includes a motor sensing, via the vibratory means, load applied by the working tool to the tool carrier means at any instant of its operation and automatically responding by correspondingly adjusting its torque and, in inverse proportion thereto, its speed, which are then transmitted, via the vibratory means, as variable-torque vibratory forces to the tool carrier means which transmits them to the working tool.
In a further preferred embodiment, the tool carrier means incorporates at least one oil reservoir situated between the first and second mounting means for supplying oil to the first and second mounting means.
It is particularly advantageous to produce the tool carrier means by casting.
The advantages of a machine according to the invention include easy replacement and substitution of tools and also universality, i.e. the possibility to attach to the same tool carrier means divers tools.
Because the tool carrier means incorporates at least one oil reservoir, i.e. has a self-contained lubrication system, the machine can work with the whole tool carrier means under water, and the provision of the oil reservoir or reservoirs ensures good thermal stability for the bearings in the tool carrier means.
It has many further advantages to have a tool carrier means to which a tool is attached compared to the known machines without any tool carrier means, particularly if the tool carrier means is made by casting. Some of the advantages have already been mentioned, other include the possibility of precision machining and assembly of the tool carrier means in high volume production, the tool carrier means is attached to the machine and the single tool carrier means can be used for any tool, and all the tools used with the machine can be made without any tool attachment means of their own permanently fixed thereto, so that they are lighter and cheaper.
The invention will now be described, by way of example, with reference to the accompanying diagrammatic drawings, in which:
FIG. 1 is a side view of a relevant part of a material working machine according to the invention provided with a bucket;
FIG. 2 is a front view to FIG. 1;
FIG. 3 is a section of the drive shown in FIGS. 1 and 2;
FIG. 4 is a front view, partly in section, of the drive shown in FIGS. 1, 2 and 3;
FIG. 5 is a plan, partly in section, of a tool carrier shown in FIGS. 1 and 2;
FIG. 6 is a side view of a material working machine according to t
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patent: 3746100 (1973-07-01), Hall et al.
patent: 4224003 (1980-09-01), St. Louis
Carternock Frederick A.
Knackstedt Jack S.
Crowder Clifford D.
Drazil Jaromir Vaclav
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