RU2784266C1 - Road roller drum stiffness control system - Google Patents

Abstract

FIELD: road and construction machines.

SUBSTANCE: invention relates to road and construction machines and is intended for compaction of road building materials. The working body of the road roller contains a stiffness control system. The end sectors of the working body, changing position with the help of a system containing springs and tension cables, allow you to adjust the contact pressure in a wide range without stopping the machine.

EFFECT: invention provides an increase in the performance of a road roller with a pneumatic tire working body.

1 cl, 3 dwg

Description

The invention relates to road construction equipment and is intended to improve the efficiency and productivity of a machine for compacting soils, road bases and coatings.

A device is known: roller road roller, having the ability to change the rigidity of the working body [US Pat. EN 2341609], consisting of a set of tires, an axle and a main frame. According to the invention, an additional frame is fixed on the roller, made in the form of several semi-frames, consisting of two parts, connected in the middle by "compressing - unclenching" "locks" (for example, electromagnets).

Such a roller of a road roller has a number of disadvantages, in particular, the complexity of the design, the use of semi-frames, the complexity of controlling the mechanism for opening the semi-frames and pressing them.

Of the known technical solutions, the closest in technical essence is the roller of the road roller with end disks, which makes it possible to effectively transmit vibrations from the vibration exciter [US Pat. EN 93090]. This drum consists of a main frame, a set of tires, an axle on which a vibration exciter is installed, and additional end discs, which, by “shrinking”, increase the rigidity of the drum and increase the contact pressure.

The operating mode of the rink is carried out as follows. At the first stages of compaction, the end discs are moved apart, i.e. the roller operates in the normal mode, in which the contact pressure is regulated by changing the pressure inside the tires. At the final stage, when the compacted material has gained a certain strength and for its further compaction, it is necessary to move the end discs and compress the pneumatic tires. The end discs do not allow the tire to expand laterally, and the drum becomes "stiff" enough to effectively use the vibration and create high contact pressures.

However, this design has the following disadvantages: the need to mount and dismantle the end disks leads to the roller stopping during operation. The technological process is interrupted, which significantly reduces productivity and increases labor costs. Time is spent not only on assembly and disassembly work, but also on additional pressing of disks and additional control of tire stiffness.

The present invention is aimed at solving the following main problems:

- reduction of time spent on adjusting the rigidity of the drum;

- reduction of labor costs for assembly and dismantling works.

The technical result of using the roller stiffness control system is to increase the efficiency of compaction of road building materials, simplify the roller stiffness control system, and increase work productivity.

The specified technical result is achieved by the fact that for the pneumatic tire working body of the roller with pressure disks, an original system for regulating the rigidity of the roller of the road roller was developed.

The invention is illustrated by the following description and the accompanying drawings, where in Fig. 1 shows the end sector for the roller stiffness control system of a road roller, FIG. 2 - the system for regulating the rigidity of the roller of the road roller (side view), in Fig. 3 – system for regulating the stiffness of the roller of the road roller (frontal view).

The roller stiffness control system contains: 1 - end sector, 2 - pressure disk, 3 - spring, 4 - tension cable, 5.6 - left and right guides, 7 - drive shaft, 8 - pneumatic tire.

The end sector 1 is connected by a spring 3, inside the spring 3 a tension cable 4 is pulled from the cable clamp, one end of which is attached to the end ends of a part of the sector 1, and the other end is attached to the drive shaft 7, located on the frame or axle of the drum.

The operating mode of the roller stiffness control system of the road roller is carried out as follows. At the initial stage of the compaction process, when a large contact patch and low rigidity of the working body are required, the tension cable 4 is wound on the drive shaft and sector 1 is “retracted”. At the final stages of the process, when high rigidity of the working body is required to reduce the energy dissipation of the vibration exciter, the pressure in the pneumatic tires increases, and the sectors are extended by unwinding the tension cable 4 with the help of a drive and a spring (by pressing a button from the roller operator's cabin).

The proposed system for adjusting the rigidity of the roller of the road roller can significantly reduce the time spent on adjusting the rigidity of the roller, eliminate labor costs for assembly and dismantling, and increase the productivity of the road roller. Thus, from the point of view of improving the sealing process, the time for operations associated with the use of end disc adjustment is significantly reduced; compaction of road building materials to the required density occurs without stopping the roller for assembly and dismantling adjustment operations.

Claims (1)

A roller of a road roller containing a working body in the form of pneumatic tires, a system for regulating its rigidity with pressure disks, characterized in that the system for regulating the rigidity of the roller is made in the form of end sectors and tension cables placed in the guides of the pressure disks, each of which is passed through a spring fixed to the sector and one end is connected to the sector, and the other end is fixed to the drive shaft.

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