Road structure – process – or apparatus – Apparatus – Tamper
Patent
1994-05-06
1996-03-05
Neuder, William P.
Road structure, process, or apparatus
Apparatus
Tamper
425456, B06B 116
Patent
active
054961327
DESCRIPTION:
BRIEF SUMMARY
The invention relates to vibrating and compacting equipment in particular for the concrete block manufacturing industry. It also relates to equipment used to tamp and compact materials using all types of vibration generator.
In a particular embodiment given merely by way of example, concrete block manufacturing consists of successively placing moulds to be filled with raw material on a vibrating platform, positioning the platform under a press so that the material in the moulds is compressed, the vibrating machine being installed under the platform allowing the combined squeezing and tamping of the grains of material.
However, the current state-of-the-art requires that the vibration generator be stopped to remove the pallet of processed products and place an empty mould on the platform, i.e. the driving means have to be shut down or switched off. These operations alone are time-consuming, not to mention the various adjustments to the drives which may ultimately cause wear or failure.
In other applications such as material tamping, the vibration generator is linked to rollers or cylinders bearing down on the material to be compacted. Such vibration generators are complex devices that are costly to use.
Vibration generators are also used on breaking and crushing equipment, likewise requiring many complex mechanisms.
The object of this invention was to design a device that would represent an improvement over state-of-the-art devices and permit the control of the vibration imparted to the machines and equipment used in various applications such as concrete block manufacturing, material tamping and material compacting and breaking.
As regards concrete block manufacturing, a further object was to design a device that would not require the shutting down or switching off of the vibration generator driving means and that would be suitable for any vibration machine used to manufacture or process products.
As regards material tamping machines equipped with rollers, cylinders or similar devices, a further object was to generate vibrations fully adjustable as to magnitude and direction as a function of the operating conditions of said rollers or cylinders.
According to a first aspect of the invention, the device controlling the vibrations imparted to machines of the type comprising a vibration generator equipped with pulleys featuring flyweights and rotated by drive shafts, is noteworthy in that the vibration mechanism consists of sets of twin pulleys linked by belts and designed to be equipped with flyweights fitted only to a diametric part thereof and in that said pulleys are mounted in pairs on two shafts which are connected to an oscillating phase-shift device designed to cause certain pulleys to rotate, thus changing the angular position of the corresponding flyweights, and generate, depending upon the positions required and selected, maximum, partial or no vibration with no unwanted torque, one of the shafts being driven by a motor running continuously regardless of the operating phase, and in that the vibrating weights can be in static and dynamic equilibrium when the vibrationless position is selected.
According to a further aspect, a first shaft has both keyed pulleys and idle pulleys and a second shaft has both keyed pulleys and idle pulleys, this being designed to form an alternating and opposed system of pulleys where each pair of pulleys linked by a belt consists of a keyed pulley on the shaft and an idle pulley on the shaft.
According to a further aspect, the device is applicable to concrete block manufacturing.
According to a further aspect, the device is applicable to material tamping machines equipped with vibrating rollers or cylinders.
According to a further aspect, the device is applicable to breaking and crushing machines.
These aspects and others will become apparent from the following description.
The object of the present invention is described, merely by way of example, in the accompanying drawings in which:
FIG. 1 is a schematic perspective view of the device according to the invention applied
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Neuder William P.
Societe Materials Vincent Vaillant MVV S.A.
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