SU990931A1 - Walking tamping machine - Google Patents

Description

() SHAHAYUN4АЯ TRAMBUKHTSAYA MAdWHA

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The invention relates to the construction, in particular to machines for soil compaction during the construction of roads, foundations and foundations.

Famous walking tumbling machine, containing a platform with a swivel plate and support plates, connected to the latter by a crank shaft. A known walking machine for surface soil compaction, containing a platform with a cabin, drive and support plates, tamping plate, placed between the supporting plates and connected to them. by means of a crankshaft, and the mechanism for moving plates G 21.

However, this machine does not provide good working conditions for the operator, inasmuch as the movement of the cabin is carried out along a semi-circle trajectory.

The aim of the invention is to improve the working conditions of the operator.

The goal is achieved by the fact that the 1st swabbing ramming machine is equipped with a cab stabilization mechanism, made 8 of the form hinged to the latter and with the platform of parallel levers with a roller on one of them and a cam, IQ rigidly fixed on the crankshaft main shaft and contacting roller. :

FIG. 1 shows a car, the total 1vid; in fig. 2-A - different positions of the machine in operation; Figure 5 is a hydraulic machine circuit.

The walking treading machine contains a platform 1 with a cabin 2, a sub-section 3 and support plates k, a tram by-plate 19 a crankshaft 6, parallel levers 7 with a roller 8, a cam 9 | rigidly fixed to the main journal 10 of the crankshaft.

the power cylinder 11, the crank pin 12 of the crankshaft, the limit switch 13 spools I and 15, throttle 16 and check valves 17 and 18.

The operation of the machine is carried out as follows.

At the initial moment, the machine is in the position shown in Fig. 1, and the spools 1 and 15 in the position shown in Fig. 5. To start stepping, fluid from the hydraulic system is supplied to the supply line by opening the crane installed in the operator's cabin. From the supply line, the liquid enters the rodless cavity of the hydraulic cylinder 11 through the slide valve 11 — the stem extends and the rotary plate 5 lifts up (figure 2). The liquid from the rod end through the spools 14 and 15 freely passes to the drain. After the transition by the rotary tamping plate 5 of the extreme upper position, its free fall begins. At the same time, the rate of stem advancement increases. In order to replenish the increasing flow rate of fluid in the rodless cavity, a check valve 17 is installed in the system, which bypasses the liquid from the drain line to the rodless cavity of the hydraulic cylinder.

When moving the rod of the hydraulic cylinder to its top dead center, the crankshaft 6 is through the final shut-off; Tel 13 places the spool in the right extreme position. Now, the liquid from the supply line will flow into the rod cavity, from the rodless cavity - freely merge into the tank. The liquid also additionally enters the rod cavity through the check valve 18. Next, the rotary tamping plate is lowered to the ground and with further movement of the hydraulic cylinder rod, the platform 1 begins to lift with the supporting plates t. At this moment, the crankshaft 6 using the limit switch (not shown takes the rider 15 to the extreme right position, thus blocking the fluid through the valve. And the fluid will only drain from the rodless cavity through the throttle 16, which regulates the speed of raising and lowering the platform 1 with base plates.

When passing the cylinder rod of the second lower dead point, the limit switch (not shown translates the valve 14 into its original position, i.e., to the leftmost position, thereby changing the hydraulic cylinder supply and draining cavity. The hydraulic cylinder rod passes through the dead center under the influence of force The sheet of the platform 1 already descending with the supporting plates 4. And the drainage takes place only through the drossage sel 16.

After the platform 1 is gently lowered, the tamping plate 5 starts to rise and the spool 15 is switched again to its original position. Dag switch; The next cycle is repeated.

The stabilization mechanism of the cab height works as follows.

Cam 9 sitting motionless on the main journal 10 of one of the crankshafts 6, profiled so

in the first half-turn of the crankshaft (Figures 1 and 2), when the tamping plate is raised and thrown, the position of the cab 2 relative to platform 1 does not change, and

the next half turn. fig. 3) when the platform 1 is smoothly lifted, the car lowers on the levers 7 downward relative to platform 1 by the amount of upward movement of platform 1, thereby maintaining the same distance between the car and the ground surface. When the platform 1 smoothly descends (fig. Cabin 2, hinged on

levers 7, rises upwards relative to platform 1 by the amount of descent down the platform, thereby maintaining the same distance between the cab and the ground surface.

Such an embodiment of the machine allows to increase its durability.

Claims (2)

1. Author's certificate of the USSR (f 523155, class E 01 S TE / Z, 1953.. 2. USSR author's certificate number 81189, cl. E 01 C 19/38. 19W (prototype) (5 Fig 2 //