SU58150A1 - Automatic spring scales - Google Patents

Description

The invention relates to automatic scales with two alternately operating buckets, equipped with dampers, opened by a mechanical drive by means of a fixed stop, including a drive mechanism.

By themselves, automatic scales with two hoppers for receiving bulk material, suspended on the yoke, are already known.

It is also known to use in them a mechanism for alternately closing and opening the intake and exhaust flaps, acting when meeting with the stop.

From such weights, the proposed automatic weights are distinguished by the fact that, in order to prevent the drive from activating during accidental lowering of the forge when treasured, should the balance be placed on the combine or on the ylotilka, (For what they are advantageous and intended, including an emphasis on one the shoulder bears the load, and the On lever is provided with a spring, which when operated, operates, without causing a rejection of the stop.

In FIG. 1 is a schematic vertical section, of an automatic spring balance, in accordance with the invention; FIG. 2 and 3 - front view and in plan; FIG. 4 - iner scheme; vibrations absorber; owls

j The balance consists mainly of two /. forging / with flaps 13, 13a (fig. 1), crankshaft 2 with eccentric drum 8, four springs 3, supporting forge / in pairs, including a mechanism and a counter 6, marking the KOvTO4ecTBo weighings performed.

i Scales are set based on

i 5 attached to the body of the combine,

. BREAKERS OR T. p. And are reported in

action with gear

 crank rotating mechanism

i shaft 2.

 Each of the bucket / has a shape

;, parallelepiped of square section, at the bottom of the terminating prism, the front and rear walls of which constitute a continuation of the walls of the paralel, the lepiped, and the right and left sides form

; among themselves right angle.

On the right and left wall of each

i bucket 1 is riveted on the cropstack 7, with which the buckets, under the action of the pr-dinner 3, fit into frame 20. On the front and rear wall of each bucket

I also have brackets on which the guide rollers are fastened, rolling along vertical guides (not shown in the drawing).

The crankshaft 2 serves to open and close the flaps: 13.13a, and is activated periodically.

The eccentric drum 8 is designed to open the pinch x holes for discharging.

The springs 3 serve to receive the weight of the material being blown and rest on the pads 16, and their tension can be adjusted with the help of BINT 19. They work in compression.

The engaging mechanism turns on the crankshaft 2 at the moment when the bucket 1 is filled with a certain amount of material to be raised. It consists of an Ura / O reinforced on the bracket 7 of the bucket (Fig. 1), ti 21 (Fig. 2), a lever 2.2 with a stop screw 32 and a jaw 26 with a dog 23 on its hub.

The drive, as indicated above, ocynie is derived from any sftap combine (shaft) or thresher, making 80-350 rpm. It consists of a shaft 24 (Fig. 2 and 3) with ratchet engagement and gears 26, 27, 28, 29, 30.

All automatic scales run in two cycles - the load cycle and the discharge cycle.

During the operation of the scales, at each moment the buckets make different strokes of them, so that when the right one unloads, the left one loads and turns. The left part in FIG. 1 is presented at the moment the download occurs. In this case, the flap- // in the lower part of the bucket under the action of the spring J2 closes its exit slit at the base. At this time, the hole controlled by the flap J3 connects the hopper to the left bucket /, while the entrance from the hopper to the right bucket is blocked by a flap. Both the dampers / 5 and J3a move in their direction. As the bucket is filled, the lowering and compression thereof occur as a result of the springs 3. This drag continues until the stop 10 (Fig. 1) presses the pull 21 (Fig. 2). T ha 21, resting its other end on the shoulder of the crank arm 22, with its

turning it rotates around its axis 31. At the same time, the stop screw 32 of the other arm of the lever 22 releases the pawl 23, which, under the action of the spring, rotates around its axis 34 sitting on the leading conical shredster 26, and hooks its pin 35 with its tooth 35 25 of the drive shaft 24. The gear 26 transmits the movement through the pinions 27, 28, which sit on the shaft 33, the pinion 29, which engages with the gear 30 of the crankshaft 2 and is provided with a double number of teeth. At the same time, the connecting rod 36 coupled to the gear 29 and the lever 39, which is seated on the axis 31, leads the lever 22 with the stop screw 32 away from the solenoid 23, and with the FULL turn of the gear 29 returns it to its original position. During this time, the pawl 23 is rotated with the gear 26 back, the prong 35 of the pawl is released from the roller 37, the pawl 23 abuts against the stop screw 32 again and the crankshaft 2 is turned off after it has been half-turned.

The crankshaft (shaft 2, turning half a turn, by connecting rod 14 (FIG. 1) and valve 75 closes the opening through which the left bucket is loaded.) At this time, the eccentric drum 8 releases the right bucket lever 15, as a result of which the opening is unloaded under the action The springs 12 close at the same time. At the same time, the drum 8 presses the left bucket lever 15, opening the slot for unloading. Thus, the left and half moves to the unloading stroke and the rights to the loading stroke, and the process proceeds in the same order.

When the scales are in operation, the buckets 1 slowly lower as they are loaded and slowly unload as they are unloaded.

Before starting work, the scales must be npioiBcpeHbi and adjusted.

Adjust; the scales can be two scares mi - in two points. The coarse adjustment is carried out by changing the pressure of the springs 3 (Fig. 1) by compressing them. The final adjustment is carried out by changing the position; e; neither the stop 10. By moving it up or down by means of the screw 18, it is removed or brought closer to the stop 21 (Fig. 2), which changes the timing of the crankshaft 2.

A load equal to the weight of the material for the moment of cut-off (closing of the flap) is placed on the hook 17 (Fig. 1). By knowing the performance of the thresher or combine and setting a constant correction of 100 g at the time of shutting off the valve, as well as determining the number of revolutions of the crankshaft, it is possible to determine the amount of the weighed amount in kg. By hanging the corresponding weight on the hook 17 and using screws 18 and 19 (Fig. 1), the automatic scales can be precisely adjusted, and they can be adjusted not only for one specific weight, but also for another desired weight, hanging another weight.

After adjusting the balance, the IC seals the adjustment points and the balance is ready for operation.

The scales are mounted on brackets on the left side of the combine, and the grain, after cleaning, is sent to the weighing buckets, and then to the bunker. Such an installation of complete weights on a combine is most appropriate both in the sense of balancing the combine and in the sense of weighing accuracy. When a scale is mounted on a combine, an inertial oscillation absorber is introduced into the starting mechanism. The operation scheme of such an absorber is shown in FIG. four. .

An additional load 5 is suspended at the end of the lever 22 (Fig. 4). At the end of the rod 21 (Fig. 4) a spring 40 is installed, the tension of which can be adjusted. The spring is calculated in such a way that, when it is turned on instantly, it cannot overcome the forces of inertia of the load 3, with a longer press, would overcome it and move the lever 22 upwards. In order to soften the oscillations of the buckets / when the combine is moving and for their greater attenuation at the moment of filling the bucket, rubber pads 41 are also installed (figure 4).

PROPOSITION and 3 o d r e t i n.

An automatic spring balance with the use of two alternating operating buckets, equipped with flaps, opened by a mechanical drive by means of a fixed stop, including a drive mechanism, which, in order to prevent the drive from being activated when accidentally lowering buckets The track, including the stop 22, carries a load 3 on one shoulder, and the switch-on lever is equipped with a spring 40, which is triggered by the track without deviating the stop.

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