SU525770A1 - Self-propelled vibratory roller - Google Patents

Description

one

The invention relates to machines for compacting building materials during construction and repair of roads.

A self-propelled vibratory roller 1 is known in which the excitation of the drive of the shaft of the exciter is provided independently of the drive of the mechanism of the movement of the vibrating roller.

The disadvantage of this vibratory roller is that when reversing the drive of the vibration exciter does not turn off, an intense vibration effect on the material being compacted and the formation of holes on it occurs.

Also known is a self-propelled vibratory roller, which contains a mechanism for reversing the movement of a vibratory roller with a control lever; vibration impact on the material being compacted during reversal.

The purpose of the invention is to provide automatic regulation of the static moment of unbalance of the exciter at the neutral position of the control lever.

This is achieved by the fact that the control lever is made with a cam, and the mechanism for controlling the static unbalance moment of the vibration exciter is equipped with a distributor with a power element in contact with the cam. Moreover, the valve is made of a hydraulic spring-loaded spool and rod in contact with the lever cam, controlling the movement reversal mechanism, and the mechanism of controlling the static moment of unbalance of the vibration exciter is made in the form of a hydraulic cylinder, the cavity of which is connected by means of a pressure line to the valve, and also a template cylinder. .

The drawing shows the proposed vibratory flow.

Claims (2)

The roller has a frame 1, on which the leading driver 3, the engine 4 and the guide roller 5 are mounted with the help of shock absorbers 2. The engine 4 drives the hydraulic pump b of the unbalance shaft 7 ciOrp drive and the reversible hydraulic pump of variable capacity 8 for the drive mech1 premaline vibration roller. The discharge line 9 of the hydraulic pump 6 is connected to the hydraulic motor 10, which, through a clip-on transmission 11, rotates the unbalanced shaft 7 of the exciter. Distributor 12 is connected to line 9, the spool 13 of which is equipped with a rod 14. Distributor has a drain line 15 and a line 16 connected to the cavity of the hydraulic cylinder 17, whose bolt 18 is connected to the axis 22 perpendicular to axis 20 by means of hinge 19 rotation shaft 7. The pressure lines 23 of the hydraulic pump 8 are connected to the hydraulic motor 24 of the mechanism for moving the vibratory roller, the hydraulic pumps 6 and 8 have control amplifiers 25 and 26. A 111-current amplifier 26 controlling a fork 27 is connected to a control lever 28 provided with a cam 29 in contact with the shaft; com 14 distributor 12. Vibro roll works as follows. When the vibratory roller is in motion, the lever 28 is deflected from the neutral position (a hell of a line, shown by thin lines). In this position of the lever 28, the hydraulic pump 8 supplies the working fluid to one of; the pressure lines 23 of the motor 24 of the movement mechanism, and the spool 13, the shchetk 14 of which is in constant contact with the cam 29 under the action of the spring 30, informs the pressure line 9 of the hydraulic pump b with the line 16 of the hydrocylinder 17. Under pressure, the hydraulic cylinder 17, moving, rotates debalance 21, sets it to the working position corresponding to the lowest value of its static moment, and simultaneously compresses the spring 31. To change the direction of movement of the vibratory roller, the lever 28 deviates from it the opposite position. In this case, the lever passes through a neutral position corresponding to the zero speed of movement of the vibration roller. In the neutral position of the lever, the spool 13, the rod 14 of which is in contact with the cam 29, moving under the action of the spring 30, separates the line 16 and the pressure line 9 and connects it to the drain line 15, and the piston of the hydraulic cylinder 17 under the action of the spring 31 through t gi 20 rotates the unbalance to a position in which its static moment relative to the axis of rotation of the shaft 7 is equal to zero. This achieves an automatic regulation of the static moment of the exciter when reversing the movement of the vibratory roller, which reduces the possibility of dimpling on the compacted surface at the time of reversal and decreases the quality of the compaction. Claim 1. Self-propelled vibratory roller, comprising a mechanism for reversing the movement of a vibratory roller with a control lever, a vibration exciter with a drive, and a mechanism for controlling the static unbalance moment of the vibration exciter, characterized in that, in order to provide an automatic control of the static moment of unbalance of the vibration exciter at the neutral position of the control, the control unit has a control unit. cam, and mehagshmizm regulation of the static moment of unbalance of the vibration exciter is equipped with a distributor with element in contact with the cam. 2. A vibratory roller under item 1, characterized in that the distributor is hydraulic with a spring-loaded slide valve and a brush in contact with the cam of the control lever of the reversing movement mechanism, and MexiaimsM regulates the static moment of unbalance vib: the exciter is made in the form of a hydraulic head, the cavity of which is connected by means of a main cylinder with the distributor, and the spring-loaded rod of the hydraulic cylinder is pivotally connected with the debalance of the vibration exciter. Sources of information taken into account in the examination: 1. French patent number 1240685, cl. E 01c, publ. July 31, 1959 2.P№C.fn8tM.Meoh.E: Hgt-sdg66-6T, VoBi8JPt aA№3 The tandem w bhatinf hoBBec: -Itfi cB9sign and deveeopmetit in i flgSd of dmaniJc by H.R.Cowfiey.