Mining or in situ disintegration of hard material – Hard material disintegrating machines – Floor-working
Patent
1990-12-06
1992-04-14
Bagnell, David J.
Mining or in situ disintegration of hard material
Hard material disintegrating machines
Floor-working
51176, 125 14, E01C 2309
Patent
active
051041952
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to a self-propelled apparatus for cutting asphalt and concrete.
BACKGROUND OF THE INVENTION
Self-propelled apparatus for cutting asphalt generally comprise a wheel supported carrying frame including a pair of rear wheels driven by, for example, a belt drive connected to a propelling motor. A petrol or diesel engine is provided with a cutting blade being attached to an output shaft thereof, and with the engine being secured to an engine frame in such a manner so as to enable the cutting blade to be displaceable into an interior of the stationary blade housing.
In, for example, DE-C-2,558,250, a self propelled apparatus for cutting asphalt, concrete and similar materials is proposed; however, the disadvantages of this proposed apparatus resides in the fact that a rather complicated construction is provided which comprises a plurality of cutting blades driven by a common combustion engine which also delivers the propelling force through a mechanically operated variable gear-mechanism.
SUMMARY OF THE INVENTION
The aim underlying the present invention essentially resides in providing a self-propelled cutting apparatus of the aforementioned type which, in operation, may be more easily controlled.
According to advantageous features of the present invention, a self-propelled cutting apparatus is provided which comprises a generator driven by the petrol or diesel engine, with the propelling motor including a low-voltage electric motor controlled by an electronic control unit connected to the generator.
By virtue of the above noted features of the present invention, it is possible to obtain a less complicated cutting apparatus which, in operation, is easier to control with respect to the propelling of the apparatus.
Advantageously, the electronic control unit controls the propelling motor, consisting of a 12/24 volt electric motor, in a continuously and reversible manner, with the electric motor being supplied with energy from the generator at 12/24 volts.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention is described in more detail with reference to the accompanying drawing, wherein:
FIG. 1 is a schematic partial cross-sectional side view of an embodiment of a cutting apparatus according to the invention, and
FIG. 2 is a schematic side view of an alternative embodiment of an elevation system for the engine and cutting blade in a cutting apparatus according to the invention.
DETAILED DESCRIPTION
The cutting apparatus of the present invention shown in FIG. 1 includes a carrying frame 15 having propelling wheels 10 and front wheels 11 mounted thereon. The propelling wheels 10 are adjustable in order to drive straight relative to the depth of the cutting. A removable water tank 6 is placed on the frame 15, and a spindle and/or a hydraulic piston is also mounted on the frame 15 in order to enable an adjustment of a height of a cutting blade 14 during a cutting operation and when the cutting operation is finished. The water tank 6 and a protection housing 2 for the cutting blade 14 are removable so that the cutting apparatus components may advantageously be packed as separate assembly units.
The cutting blade housing 2 is secured to the stationary carrying frame 15, with the cutting blade 14 and a petrol or diesel engine 1 being mounted on an engine frame 12. The engine frame 12 may be mounted so as to be tiltable on two bearings or may be elevated by a jaw-tongs-mechanism such as shown in FIG. 2.
The self-propelling apparatus is propelled by a 12/24 volt generator 3 driven by the engine 1, with the generator 3 supplying electric power to an electronic continuously controlled regulator 4 which supplies electric power to a 12/24 volt electric propelling motor 5. The propelling force from the electric motor 5 is transmitted to the propelling wheels 10 by a belt drive system 7, 8, 9. The electric motor 5 may be pivoted downwardly to loosen the driving belt by displacement of the handle 1e shown in FIG. 1 to enable an uncoupling of the wheels 10.
The self-propel
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patent: 2673725 (1954-03-01), Coates
patent: 2701134 (1955-02-01), Kliepera
patent: 2934327 (1960-04-01), Lewis
patent: 3045992 (1962-07-01), Asbury
patent: 3141702 (1964-07-01), Barton
patent: 3357745 (1967-12-01), Cooper
patent: 3387891 (1968-06-01), Simms et al.
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