IL30535A - A vibratory road-roller - Google Patents

Description

A vibratory road roller vibratory supplied to heavier drum double the inertia force is of the strokes on the ground caused by the vibrations of the eccentric shaft without the need for greater power than Instead of two relatively weak strokes distributed between two each taking one a relatively heavy vibratory stroke using cannbe a considerably more intense vibratory effect the on the ground is A strong vibratory stroke results wit the vibratory said being worth more than two relatively weak it is if it is necessary to use a smaller inertia to drive only the vibratory shaft of the other so that less motor power is taken The heavier be about heavier than the other it may be more than in this the heavier may weigh at least of the overarll weight of the The eccentric weights of vibratory shaft of the heavier drum are greater in weight those of the The ratio of the weights correspond more or less to that of the weights of the tyres The motor driving the vibratory shafts may be provided with a clutch by which the motor can be selectively connected with the vibratory shaft of dne or with that of the other In a normal reverse travel can be selected by a reverse The he vier drum is advantageously the v front drum of the The drums may be of different the heaVier drum being o a greater the in this both drums run with their side faces flush on the drive having a relatively heavy tyre The 3 with the heavier tyre may be about to heavier than the drum The weight of the drum 3 be made more than heavier than that of the drum The heavie j drum 3 advantageously amounts to at least of the overall weight of the The heavy drum 3 has a Vibration shaft on which eccentric weights are The shaft 15 is rotatably set in bearings 17 in the and an end of the shaft 15 carries a pulley wheel A motor which can simultaneously drive the and the is mounted on the frame 5 for above the drum 2 as The motor connected by a belt drive to a gearbox 21 mounted in the middle of the The motor power is divided up in tho gearbox the smaller part going to the and a reversing gear is provided for the reverse A further branch in the gearbox 21 leads to a pulley wheel 22 for the A toothed belt 23 connects the to the 18 of the and a tensioning pulley wheel 24 The gear drive is located in a casing while the drivd for the 15 is in a casing The can be equipped with an insertable shaft The weight and size of the eccentric weights are arranged to suit the tyre of the drum A lever 28 allows selection reverse or forward A motor independent of the road drive may be provided For driving the The serves in particular as a implement for consolidation work in a the roller being made relatively For this the motor in the direction of the being capable of being mounted above the rear In the embodiment only the front drum with its heavy weight and the ensuing inertia is equipped with a while the lighter drum 2 is used to support the and does hot have a Zn the embodiment shown in 4 the lighter drum ί is provided with a carrying eccentric weights 30 correspondingly lighter than the weights 16 of the shaft 15 of the heavy drum The 29 a pulley wheel to which is driven by a toothed belt 33 from a pulley wheel 33 which is independent of pulley wheel which drives the A clutch may be provided for the pulley wheels 22 and so that either of the shafts 29 may be driven selectively by the motor In this a results with two possible types of in which either the drum with the heavy vibratory strokes takes up the full motor power for the vibratory if a lesser vibratory power is only the rear vibratory shaft 29 is according to the given can theoretically deliver about half the inertia force of the vibrator When the is of normal the motor 34 can be mounted with the gearbox The gearbox 35 has a branch for the with a corresponding clutch for forward reverse The ganged shown in 5 and 6 consists of units la and In units and the drums are of different drum 3b with the thicker1 and heavier being longer than the drum 2b with narrower insufficientOCRQuality

Claims (1)

1. What I claim is i- . 'A * 1· A vibratory road-roller having two driven roller-drums lying one behind the other in the direction of travel, and carried by a rigid frame, at least one of the roller-drums having a vibratory shaft provided with eccentric weights, · in which one of the roller drums is considerably heavier than the other roller-drum and power of a motor available for the vibratory work is supplied only to one roller-drum* 2. A road-roller as claimed in Claim 1, in which the heavier roller-drum is about 30% to 50% heavier, than the lighter roller-drum. ' ; - 3. A road-roller as claimed in Claim 1, in which the heavier roller-drum is over $0% heavier than the lighter roller-drum* 4· A road-roller as claimed in Claim 1 in which the weight of the heavier drum amounts to' at least S0% of the overall weight of the road-roller, v / 5* A road-roller as claimed 'in any one of, Claims 1 to 4, in which both roller-drums ' have vibratory shafts with eccentric weights and the eccentric' weights of the vibratory shaft of the heavier drum are heavier than those of the lighter drum, ; and the ratio of weights of the' eccentrics of the two shafts corresponds approximately to the ratio of the weights of tyres respectively on the rolleridrums. . ; . 6. A road-roller as claimed* in Claim 5, in which the moto in driving connection with the vibratory shafts may be coupled by a clutch to either of the vibratory shaffs0 ■■ 7. A road-roller as claimed'" in any one of Claims I1 to 4* in which the lighter drum 'does not have a vibratory 'shaft* 8. A road-roller as claimed" in any one of Claims ln to 7» 'r in which the motor is in driving connection with thtf vibration shaft and with the roller-drums, and is mounted above the lighter ti n : ·· roller-drum*