A SELF-PROPELLED APPARATUS FOR CUTTING ASPHALT AND CONCRETE

Abstract: A self-propelled apparatus for cutting asphalt and concrete with complete protection housing (2) for the cutting blade. The propelling force being transmitted by belt drive and are electric working (3, 4 and 5), 12/24 volt by cutting apparatuses from 120 to 350 kg. Generator, continuously electronic regulator-box, electric motor, belt and belt discs (3, 4, 5, 7, 8 and 9) may be mounted on other types of cutting apparatuses comprising no propelling means.

Description: Λ self-propelled apparatus for cutting asphalt and concrete. The invention rela es t.o a self-propelled apparatus for cut¬ ting asphalt and concrete, by hi h the cutting blade is completely rotec * -"! uring the whole working process and the propelling is electric working. Asphalt and concrete cutting apparatusses of this dimension (120 to 350 kg) are not known with a 12/24 volt propelling system (3, 4 and 5). Asphalt and conrete cutting aparatusses by which the blade is completely protected during the wor- king process are not. known. The asphalt and concrete cutting apparatus is constructed in such a manner that when one is working with the cutting apparatus nobody can be hurt by the blade. The blade housing (2) is secured to the stationary frame on which the wheels are placed, Figs. 1 and 2. Blade and engine is mounted on an engine frame (12) being tilting on two bearings or being elevated by a jaw-tongs mechanism. Fig . 2. Asphalt and concrete cutting apparatusses of this dimension (120 to 350 kg) are known for manual propelling and without complete protection of the blade. The propelling of the self-propelling apparatus is working by means of a 12/24 volt generator (3) supplying electric power to an electronic continuously controlled regulator (4) Fig. 1 and Fig. 3 which supply electric power to a 12/24 volt electric propel- ling motor ( 5 ) . The asphalt and concrete cutting apparatus consists of a stationary frame (15) on which the wheels (driving wheels 10 and front wheels 11) are mounted. The driving wheels are adjustable in order to drive straight relating to the depth of the cutting. On the frame is mounted a demountable water tank (6) on which a spindle (13) or a hydraulic piston ( it. might be both parts) is mounted in order to elevate the bla¬ de (14) w en the cutting is finished. Due to the water tank (16) and the protection housing (2) are demountable is also obtained that advantage that the cutting apparatus may be packed together as an assemple set. The electronic regulator box (4) has the advantage that the apparatus may be opperates by anyone. The transmission of power from the electric motor to the driving wheels (10) takes place by means of a strap (7) which may be uncoupled for transport. The self-propelled asphalt and concrete apparatus may be produced in more dimensions - from 120 to 350 kg - with a petrol or Diesel engine (1). The cuuting apparatus meets the strongest security require- ments from the labour inspection authorities. Fig. 3 shows: Plus ( + ■ ) terminal to box 1, minus (-) terminal to box 2, capacitor 3, resistor 4, resistor 5, transistor 6, Zenerdiode 7, transistor 8, resistor 9, capacitor 10, tran¬ sistor 11, transsistor 12, transistor 13, potentiometer 14, resistor 15, Zenerdiode 16, transistor 17, transsistor 18, switch orward/reverse 19, switch heigh/low velocity 20, terminal low velocity forward 21, terminal heigh velocity forward 22, minus (-) terimal to motor 23.

Claims: AMENDED CLAIMS [received by the International Bureau on 27 October 1989 (27.10.89) original claims 1-5 replaced by amended claims 1-3 (1 page)] 1. A self-propelled apparatus for cutting asphalt and concrete and comprising a wheel supported carrying frame (15) of which a rearmost pair of support wheels (10) by means of a belt drive (7, 8 and 9) is connected with a pro¬ pelling motor (5), a demountable water tank ( 6 ) , a statio¬ nary blade housing (2), piston means and/or spindle means (13) for adjusting in the height of an engine frame (12) by parallel displacement or swinging therof in relation to the carrying frame (15), a combustion engine (1) and a carrying shaft for a cutting blade (14) being secured to said engine frame (12) in such a manner that the cutting blade (14) is displaceably placed at one side of the engine frame (12) inside said blade housing (2), c h a r a c t e r i z e d in that the apparatus comprises a generator (3) being driven by means of the combustion engine (1), that the propelling mo¬ tor consists of a preferable low-voltage-motor (5) and that the propelling motor (5) is controlled by means of an elec¬ tronic control unit (4) connected to the generator (3). 2. A self-propelled apparatus for cutting asphalt and concrete according to claim 1, c h a r a c t e r i z e d in that the propelling motor (5) comprises a driving disc (8) and being pivotally arranged on a bracket placed between the carrying frame (15) and the water tank (6) in such a manner that a driving belt (7) between the drive disc (8) and the disc drive (9) by swinging the propelling motor (5) by means of a control handle may be loosened and may be tightened in order to declutch and to couple the propelling motor (5). 3. A self-propelling apparatus for cutting asphalt and concrete according to claim 1, c h a r a c t e r i z e d in that the electronic control unit (4) is adapted to control the propelling motor (5) consisting of a 12/24 volt electric motor in a continuously and reversible manner and to be supplyed with energy from the generator at 12/24 volt.

Inventors: ZACCO BO RAVNSBAEK, ZACCO, BO, RAVNSBAEK
Applicants: ZACCO BO RAVNSBAEK, ZACCO, BO, RAVNSBAEK
Application year: 1989
Main classification: E01C23
IPC codes: B28D1