US3181442A

US3181442A - Vibrator for compacting the bed and surfacing of roads

Info

Publication number: US3181442A
Application number: US100296A
Authority: US
Inventors: Jurg H Brigel
Original assignee: Individual
Current assignee: Individual
Priority date: 1960-04-05
Filing date: 1961-04-03
Publication date: 1965-05-04
Anticipated expiration: 1982-05-04
Also published as: CH382210A

Description

May 4, 1965 BRlGEL 3,181,442

VIBRATOR FOR COMPACTI NG THE BED AND SURFACING OF ROADS Filed April 5, 1961 3 Sheets-Sheet 1.

Fig.1

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United States Patent 3,181,442 VIBRATOR FOR COMPACTING THE BED AND SURFACING OF ROADS .liirg H. Brigel, Staufi'acherstrasse 96, Zurich, Switzerland Filed Apr. 3, 1961, Ser. No. 100,296

Claims priority, application Switzerland, Apr. 5, 1960,

3,836/60; Austria, July 22, 1960, A 5,628/60 1 Claim. ((31. 94-48) This invention relates to a vibrator for use in compacting the bed and surfacing of roads and comprises a plurality of juxtaposed compacting plates, each carrying a vibrating set.

In contradistinction to vibrators of the type hitherto known, the invention is principally characterized in that each of the compacting plates is connected to a carrier portion attached to a vehicle, by at least two toggle levers arranged in opposition to each other other, and of whose two legs are linked to each other and to the compacting plate or carrier portion, rubber-elastic elements being incorporated to elastically resist the movement of the joints in either direction.

Further features of the invention will appear from the following description, taken in conjunction with the accompanying drawing wherein there are shown, purely by way of example, a form of the invention.

FIG. 1 is an end view of a multi-plate vibrator attached to a vehicle;

FIG. 2 is a top view of the parts shown in FIG. 1;

FIG. 3 shows, partly in end view and partly in section, a detail of the vibrator on a larger scale and taken on line 3-3 of FIG. 4 in the direction of the arrows; and

FIG. 4 shows a front view of the same detail.

The disclosed multiplate vibrator enables the associated vehicle to be better utilized, inasmuch as the vibrator, when not being used, can be removed from the vehicle in a relatively simple manner and the latter be employed for other duties. The multiplate vibrator may also be attached to a trailer, whereby a tractor or a similar traction vehicle may serve to pull it. Also in such case there is the advantage that, in periods of non-use of the vibrator, trailer and traction machine can be used normally.

The road vibrator comprises a plurality of

plates

101, 101a, arranged in juxtaposed relation, only the three middle ones of which are shown in FIG. 2. Each of said plates is connected through two pairs of oppositely disposed toggles 102a, to a carrier portion in the form of a tubular axle 103 common to all plates. The toggles each consist of a lower leg 102a pivoted to the inclined section 101a of the plate, and an upper leg 1021) made up of two parallel bars pivotally connected to a yoke part 105. The yoke parts 105 are bolted to projections 103a welded to the tubular axle 103 (FIGS. 3 and 4). The toggle legs 102a and 10% are connected to one another and to the

plate

101, 101a or yoke parts 105 by means of joints 110 which, individually, are designed as follows:

Each yoke part 105 is provided with a square sleeve 1050. which accommodates four rubber-elastic elements 110a having embedded therebetween a substantially square joint pin 1020. Said rubber elements have substantially the form of triangular prisms. One end of the joint pin 1020 has welded thereon one bar of the toggle leg 102b, whereas the other bar thereof is disconnectably mounted at the opposite end of said joint pin 1020 by means of a screw 102d, as shown in FIG. 4.

Each toggle leg 102:: carries at its two ends a square sleeve accommodating four rubber elements 110:; in the form of triangular prisms, having embedded therebetween a square joint pin 1011a and 102 respectively. The joint pin 1011) is removably attached by pins 101C to the associated

plate

101, 101a. The other joint pin 102 is EJMAQZ Patented May 1%65 bored through longitudinally and fixed by means or a bolt 102g and a nut 10211 between the bottom ends of the two bars of toggle leg 10%. When the nut 10211 is loosened, the joint pin 102 may be changed in its rotary position relative to the toggle leg 102b, and then be fixed again by tightening the nut 102k.

The tubular axle 103 is mounted on two stirrups 107 each of which, by means of a horizontal hinge-bolt 108, is pivotally arranged on a dependent bracket 104a of a crossmember 104. The latter is fixed to the front end of a motor vehicle, in a way not shown in greater detail. Said crossmember 104 further carries two upstanding brackets 104b each having pivotally mounted thereon a hydraulic cylinder 112 by means of a joint bolt 114. Each cylinder 112 contains a piston, which can be loaded on either side, and with its rod 11% connected through a joint 113a to one and/or the other fork 107. To said cylinder 112 there are connected pipes a and 1201) which, by a control valve 119, may be selectively connected to a pipe 116 coming from the pump (not shown), or to a pipe 120a leading to a liquid tank (also not shown) or may be shut off entirely.

Each

plate

101, 101a has mounted thereon a vibrating set 122 with a built-in electric motor and rotating unbalanced masses. The cables 126, serve to feed the electric motor, controlled by switches (not shown) to a threephase generator which can be driven by a diesel engine. The generator and the diesel engine (not shown) are arranged on the vehicle 130.

According to FIG. 1, the hinge-bolts 108 have each pivotally supported thereon a square member 131 which is bored lengthwise and embedded between four rubberelastic elements 132 housed in a square sleeve of the respective fork 107.

Since all plates 101, 10101 are connected to a common carrier portion, such as the tubular axle 103, the pistons of the two hydraulic cylinders 112 being always moved up and down or stopped at the same time and in relation thereto, all plates 101, 1010: will be substantially lined up always at the same level. Any difierences arising in the position of the plates only result from the movement of the joints 110. For this reason, when using the vibrator, one obtains, without undue effort and without any notable demand on the skill of the operator, a plane surface as to the compacted material or of the soil.

But, if necessary, it is also possible to achieve a cambered surface of the ground. For this purpose, at least on one toggle pair of some plates, the bolts 102g of the middle joints 110 connecting the two legs 102a and 102kof the toggles to each other are set to a rotary position differing from that of the other plates. The modified rotary position of the joint bolts 102g will thus cause pressure stresses in the adjacent rubber elements 110a and thus endeavour to give the respective toggles a different position of rest. In this way it is possible to have some of the plates set into a higher or lower position or even into a sideways slanting position.

With the help of the two hydraulic cylinders 112, the tubular axle 103 with the

plates

101, 101a thereon can be moved not only upwards, but also downwards by hydraulic pressure, in order thus to produce a higher pressure of the plates on the material being compacted. In FIG. 3 there is shown in chain-dotted lines how the toggles 102a, 1021) are then more inclined thus causing corresponding compressive stresses in the rubber elements 110a. The forces thus stored in the rubber elements 110:: then effect an approximately uniform pressure of the plates on the ground, even should the latter exhibit appreciable unevennesses.

The rubber elements 110a keep vibrations away from the vehicle to a great extent. Also the rubber ele- 3 V merits 132 around the joint pins 108 of the forks 107 serve the same purpose.

It is understood that various changes and modifications may be made in the embodiment illustrated and described herein without departing from the scope of the invention as defined by the following claim.

What I claim is:

A vibrator machine for compacting the bed and surfacing of roads, comprising a frame, a plurality of juxtaposed compacting plates each having a vibrating means mounted thereon and at least two levers afiixed to each plate, a rod and carrier secured to the frame, two levers connected to the rod and to the first-mentioned levers to form a toggle lever pivotally joined to each other by means of a joint, the lower end of each toggle lever being pivotally connected to the compacting plate by means of a second joint and the upper end of each toggle lever being pivotally connected to the carrier by means of a third joint, the two toggle levers and the joints with the carrier and rod and its plate forming a substantially polygonal configuration in side elevation, a pin of non-circular cross-section With flat side portions for each joint With each joint pin being fixed to one lever interconnected by the joint, a plurality of rubber-elastic elements disposed adjacent said flat side portions of each joint pin, means for securing said rubber-elastic elements to the levers interconnected by the joint, said rubberelastic elements of each joint elastically exerting resistance to the movement of the joint in either direction, and a hydraulic cylinder and piston rod connected to the frame and the carrier to be loaded on either side of the piston to move the rod up and down for raising the plates from the ground and positively pressing the plates on the ground.

References Cited by the Examiner UNITED STATES PATENTS HENRY C. SUTHERLAND, Primary Examiner.

WILLIAM I. MUSHAKE, JACOB L. NACKENOFF,

Examiners.