SU116345A1 - Automatic Lever Scales - Google Patents

Description

Lever scales with a counterweight and a ladle are known for weighing candy and lump sugar poured from a bunker to a predetermined weight with the help of dampers driven by levers and electromagnets. The disadvantages of these scales are the unsatisfactory accuracy of the plumb line and the complexity of the design, as a result of which they are not widely used, and the weighing of finished products in the confectionery factories is still done manually.

These deficiencies are eliminated in the described automatic lever scales due to the use of:

a) coarse plumb and precise weight gain mechanisms, the first of which is activated by a clutch and the second is driven by an electromagnetic vibrator;

b) a clutch, made in the form of a rigidly fixed cam cam roller of a disk fitted with a roller and a spring-loaded dog, is in engagement with the gear at the time of a rough plumb and sunk into the socket by the end of a spring-loaded slider connected with the starting electromagnet;

c) the agitator, placed in the hole of the bunker and driven by the B action from the electric motor by means of a worm gear pair.

FIG. Figure 1 shows the kinematic scheme of the scales; in fig. 2 - diagram of the action of the mechanism of accurate addition; in fig. 3 is a diagram of the mechanism for automatically switching the cam shaft on and off.

An automatic lever balance consists of a bunker; the mechanism of a coarse plumb, made in the form of two main grooves, set in oscillatory motion by ratchets located under them, mounted on the drive shaft; a thin weight mechanism made in the form of an electrovibrator, an electrical contact device and a weighing chute; overlap mechanism; camshaft with clutch; rocker arms, cups and weight holders of scales.

The scales are driven by an electric motor and operate as follows.

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After the mechanisms are turned on, the drive shaft (together with the two 2 n 3 pushers rigidly attached to it) (the vibrator) begins to rotate. Chutes 4 and 5 are lowered onto the pushers and oscillatory movements are communicated to them. The finished confectionery products, fed by the conveyor into the hopper, moving along the vibrating main grooves 4 and 5, are fed through the guide chamber 6 into the weighing pan 7 of the balance. At regular intervals, by means of the cams 8 and 9 fixed on the camshaft 10 and the levers, the main grooves are separated from the pushers ... and 3, as a result of which the grooves vibrate and the bulk filling of the products into the weigher stops. Upon further rotation of the camshaft 10, the lever // under the influence of the cam 12 (Fig. 2) retracts the lever 13 and, with it, the mechanism locks to the rearmost position, as a result of which a hole is opened in the guide chamber 6 for the passage of products from the downstream chute 14. The lever //, acting on the lever 13, connects the latter with the lever 15, which sits on the axis 16 of the electrocontact device, thus closing the contacts. The lever 17, which also sits on the axis 16 of the electrocontact device, engages with the pawl 18, which holds the contacts of the device in a closed position, and the electromagnetic vibrator 19, having started to act, informs the downstream chute 14 oscillatory movements. The agitator 20, rotating in the bunker, warns of the possibility of water formation and ingress of large doses by adjusting the flow of products to the weighing chute of four to five shtukh. Vibration of the pre-trough chute and the arrival of products in small portions provides a thin addition to the desired weight. Upon receiving a given weight, the rear part of the yoke with its protrusion presses the contact of the electromagnet P /, which attracts the dog /. The lever / 7, leaving the engagement with the dog / S, opens the contacts in the electrocontact device, the electromagnetic vibrator 19 stops operation, the lever 15 leaves the engagement with the lever 13, and the valve 22 closes the spring in the direction of 6.

Products that move by inertia from the pre-moving chute, access to the bucket will be stopped, they will remain in the guide chamber on the valve. The camshaft 10, after completing a complete revolution, is disengaged from the pinion gear 23 and stops rotating until those weights have been removed from the portion of the weighed products.

When a given weight is received, an electromagnet 24 (Fig. 3) is triggered, which attracts one end of the pawl 25 fixed on the axis and releases the slider 26. The latter, under the action of the lever 27 and the spring 28, goes to the side and releases the clutch 30 pushed into the socket. The dog 29, under the action of its spring, engages with the pin of the adjacent pinion 23, thereby ensuring the second weighing.

At the beginning of the cam shaft rotation, the cam 31 opens the weighing bucket by means of the lever 32 acting on the lever 33, which, in turn, drives the system of levers holding the sash doors. After freeing the bucket from the products, its flaps are closed with the help of cargoes fixed on them.

Subject invention

1. Automatic lever scales for weighing, for example, candy, including a hopper with agitator, a yoke with a counterweight and a bucket, a system of interacting levers, electromagnets, electric actuator and cam roller, which distinguish-.

Geni and tTzhe exact weight gain mechanism. driven by an electric P TZpT in ± l; G-weights according to claim I, characterized in that the clutch roller is applied on a Kutach roller, made in the form of a rigidly mounted disc, equipped with an ohm roller and a spring-loaded dog that meshes with the gear The “spring of the spring-loaded slider, coarse from the weight and embedded in the socket by the end of the spring-loaded slider, is related to item 1 ™, distinguished by the use of a rotator driven by an electric motor by means of a worm gear in the hole of the hopper.

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