SU1470833A1 - Road roller - Google Patents

Abstract

The invention relates to pavement compaction devices and makes it possible to increase compaction efficiency. The road roller contains frame 1, sections of rollers 2 of the same diameter, on the axis of which two additional links 3 are articulated in the form of t g rigidly connected at a right angle, each of which has one of the free ends connected to the connecting rod 4 by means of a crank mechanism. the hinge 5, and the other with the corresponding section of the rollers 2. Additional links 3 are pivotally connected to the frame 1 by means of rods 6. When the drive shaft 11 is rotated, the sections of the rollers 2 simultaneously perform a reciprocating motion and produce a lot converse effect on the sealing sacrificial material per pass the road roller. A change in the amplitude of oscillations of sections of rollers 2 is achieved by changing the length of crank 8. 8 Il.

Description

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FIG. /

The invention relates to pavement compaction devices, namely road pavement rollers, and can be used for road construction materials and soils.

The aim of the invention is to increase the efficiency of compaction.

Figure 1 is a diagram of a road roller 10, side view; Fig. 2 shows a road roller, front view (option with pneumatic 1); Fig, 3 - the same, the version with hard rollers; FIG. 4 is a section A-A in FIG. 1; 15 Fig. 5 is a section B-B in Fig. 2 (the bottom of the diagram is the installation of pneumowheels); Figure 6 - the same, chessboard installation of wheels; Fig. 7 is a sequence diagram of the torque distribution on the drive shaft in one revolution of a crank mechanism; Fig. 8 shows the trajectory of movement of the additional link hinges.

The road roller contains a frame 1, 25 sections of rollers 2 of the same diameter, on the axis of which two additional links 3 are articulated in the form of r, rigidly connected at a right angle, each of which has 30 one of the free ends connected to the connecting rod 4 of the crank-connecting rod Mechanism by means of a hinge 5, and the other with the corresponding section of rollers 2. Additional links 3 35 are pivotally connected to frame 1 by rods 6. On frame 1 there is a drive shaft 7 with crank 8 on bearing supports 9, and a key on the key of the first one. we pulley 10, simultaneously performing the role of the flywheel. The drive 11, (for example, a hydraulic motor) is connected to the pulley 10 by a flexible gear 12 (for example, a V-belt or a chain), the locking pins 1 j and 13 are installed on both sides between the additional links 3.

. . Two rods 6 and two additional links 3 form a hinged articulated four-star gear.

On the axles of the sections, as a sealing working body, pneumatic wheels can be installed (fig. 2). Or rigid rollers (fig. 3). Pneumatic the wheels on the axles of the x sections are set-. with a row, (figure 5) or chess (6) schemes.

Road roller works as follows.

.

In order to transfer the roller from the transport position to the working position, lock rods 13 are removed.

When the drive shaft 11 rotates, the torque is transmitted through the flexible gear 12 to the drive shaft 7 and the crank 8. The connecting rod 4 acts through the node 5, which can reciprocate in the vertical plane, to the additional links 3 and causes their parallel movement. As a result of this, the sections of the rollers 2, connected with the additional links 3, simultaneously make a reciprocating movement with synchronous amplitude-frequency characteristics and have a multiple impact on the compacted material.

. A change in the amplitude of oscillations of the roller 2 of a roller is achieved by changing the length of the crank 8.

The direction of the torque on the drive shaft 7 is changed four times in one full turn of the crank 8 (Fig. 7).

Zrni 1 and 3 correspond to the position of crank 8 (Fig. 1) when energy is consumed for rolling sections of rollers 2 from drive 11 (vectors of speed and acceleration of rolling section of rollers 2 coincide). Zones 2 and 4 correspond to the position of the crank 8 when energy is transferred from the section of rollers 2 to the drive 11 due to the positive influence of energy forces (velocity vectors and rolling accelerations of section 2 of rollers 2 have opposite directions).

When the road roller moves along the compacted material with the drive 11 turned on, the compaction process first starts from repeated reciprocating actions of the first (front) section of the rollers 2, and then from the second one with the same characteristics.

 Have

As a result, the material undergoes repeated effects of compaction forces from the sections of the rollers arranged in succession in two rows, as the road roller passes along one track. Do that increases the efficiency of compaction of road building materials and soils.

Claims (1)

Invention Formula A roller, including a frame, rollers, a crank mechanism, kinematically associated with roller sections, characterized in that, in order to increase compaction efficiency, it is equipped with rods and symmetrically located relative to a vertical plane passing through the crank axis, additional links in the form of t. rigidly connected at right angles, each of which one of the free ends is hingedly connected with a crank mechanism, and the other with a corresponding section of rollers, each of the rods being hinged with a frame and one of the additional links. the joints are tg, and the roller sections are located relative to the longitudinal axis of the roller in succession in two rows.  U / /////////// // ////// /// ////// ////////////////// /////////////////// l 1, g. S -rU 6 s 5 FIG. 7 ff-e 6 FIG. B