SU1500843A1 - Weight-measuring device - Google Patents

Abstract

The invention relates to instrumentation, namely, to beam, carriage and automobile scales. The purpose of the invention is to improve the accuracy of calibration of the secondary device and improve operational reliability. In the calibration position, the force-measuring sensor 1 is under the action of tensile force of the rocker arm weights. When they are set at the zero point of the scale of the rocker arm, the force measured by the secondary device 2 is equal to the initial force P _{O of the} weight mechanism 5. If the readings of the device differ from zero, then it is tared. To adjust the secondary instrument, the weights are moved along the scale and calibrated. At the same time, under the action of forces on the force-measuring sensor 1, it is stretched by the amount of elastic deformations. When the arm rotates clockwise, with the angular reproduction error of the calibration force, the arm is set in a horizontal position on the pointer 20. For this, the shaft 9 is turned by the control knob 19 by means of the screw 18 and the worm gear 15. When the shaft 9 rotates, the loading beam 12 is lowered and the unloading 13 rises, which further increases the gap δ ₂ in the force disconnect link consisting of two earrings 6 and 7. When measuring, the control knob 19 is rotated in the opposite direction until the first and second beams 12 and 13 will not come out of contact with earrings. When the first isolation / urging / second and 12 / unload / 13 from beams 6 and 7 earrings force measuring sensor 1 is loaded weighing mechanism 5. The rocker weights detent 21 is closed, and the beams 12 and 13 are retracted from the corresponding gaps earrings the amount δ ₁ and δ ₂ , necessary to avoid locking the moving parts of the scales during manual weighing. For the rapid removal of beams 12 and 13, shaft 9, together with the worm wheel 15 and the screw 18, rotates through an angle of 180 ° up to the stop 17. The scales thus operate in automatic or manual mode. 4 il.

Description

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For this, the shaft 9 is turned with the control handle I9 by means of the screw 18 and the worm gear 15. When the shaft 9 rotates, the loading beam 12 is lowered, and the unloading 13 rises, which is even more increases the gap if in the force breaking link, consisting of other earrings 6 and 7 °. When measuring, control 19 turns in the opposite direction until the first and second beams 12 and 13 fail / come out of contact with the earrings. When the first (loading) 12 and second (unloading) 13 beams are removed from earrings 6 and 7, the load sensor 1 is loaded by a weight mechanism 5. The balance arm is closed with arresting device 21, and beams 12 and 13 are retracted from the corresponding ear rings by the amount of clearances tf, and cf necessary to avoid stopping the moving parts of the scales during manual weighing. For the rapid removal of beams 12 and 13, shaft 9, together with the worm wheel 15 and the screw 18, rotates through an angle of 180 up to the stop 17. The scales thus operate in automatic or manual mode 4 or less.

The invention relates to instrumentation, namely to beam, carriage and automobile scales,

The purpose of the invention is to improve the calibration accuracy of the secondary device and improve operational reliability,

Fig, 1 shows a general view of the device; FIG. 2 is a section A-A in FIG. 1; in Fig about 3 view B in Fig.4 is a section bb in

The weighing device consists of a force-measuring sensor 1, a secondary device 2 and a torque tool. The first grooves in the vertical grooves of the first 6o. In the swinging plane of the rocker arm there is a vertical shaft 9 with two nuts. One ends (right) of the ball contact with the earrings, and the other (left) with the guide i 4, the loading ball

When the 12 is in contact with the first earring through a kinematic pair of prism-pillows, and the unloading 13 contacts directly with the inner surface of the second earring 7i, A worm wheel 15 and a vault 16 are firmly mounted on the shaft 9 and slide 16 through a sliding fit “Sleeve 16 an annular groove for the stop 17, foam bearings for the screw 18 are attached to it.

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Shaft screw 18 has a control knob 19.

The weighing device works as follows

In the calibration position, the force-measuring sensor 1 is under the action of the tensile force created by the weights of the rocker arms. Since they are set at the zero point of the scale of the rocker arm, the force measured by the secondary device 2 is equal to the initial force. Pp of the weight mechanism 5. If the readings of the device differ from zero, then it is calibrated. To align the secondary device, weights are moved along the scale, and comparing the readings of the instrument with the digitized marks, calibrate it. At the same time, under the action of the increasing force on the force-measuring sensor, it is extended by the amount of elastic deformations. The beam rotates clockwise,

This results in an angular error in reproducing the calibration force due to the decomposition of the force on the end prism. However, this error is eliminated by placing the rocker in a horizontal position on the pointer 20. For this, the shaft 9 is rotated with the control handle 19 by means of the screw 18 and the worm gear 15. When the shaft 9 rotates, the loading bar 12 lowers and the unloading 13 rises. What is more increasing

 the gap of a force link, consisting of two earrings 6 and 7.

To put the balance into measurement mode, the control knob 19 is rotated in the opposite direction until the first 12 and second 13 beams come out of contact with the shackles. When the loading and unloading beams 12 and 13 are detached from earrings 6 and 7, the force-measuring sensor is loaded by the force of the weight mechanism 5. The balance arm is closed with arresting device 21, and the beams 12 and 13 are retracted from the corresponding ear rings by the amount of clearances and f (FIG. 2), necessary to avoid blocking the moving parts of the weights in the manual weighing mode. For quick removal of the beams 12 and 13 — the shaft 9 together with the worm gear 15 and the screw 18 rotates through an angle of 180 ° until it stops 17. In this position (shown in dotted line in Fig. 3), the balance is ready for operation in the automatic weighing mode with the help of force measuring; sensor and secondary device, or in manual mode using a boom pointer device

Claims (1)

Invention Formula A weighing device that contains a rocker arm with a load cell built into it, connected to a secondary device, and a tapering device, characterized in that, in order to increase the accuracy of the calibration of the secondary device and improve operational reliability, it is connected with a heavy beam the first earring and the second earring in contact with it, and the calibration device is made in the form of a shaft and a worm wheel located on it with a worm, on which a control stick is fixed, ki .skolz by planting conductive annular grooves and two counter-thread screws, as well as the two beams attached respectively to the first and second nuts and its ends in contact with the second der howling and earrings, wherein the sleeve is coupled to the worm. FIG. 2 WA96 in the (riel