A crawler-type meter counting device

Abstract

The invention discloses a crawler type length counting device comprising two synchronous belt mechanisms. The two synchronous belt mechanisms arranged in an up-down mode are used for clamping a measured object, wherein the center distances are equal; portions, between the two pairs of front and back synchronous belt wheels, of clamping sides of the synchronous belts of the upper synchronous belt mechanism and the lower synchronous belt mechanism serve as clamping and contact segments; and pressure exerting mechanisms that are capable of exerting positive pressures on the clamping and contact segments towards the direction of the measured object are arranged at the inner sides of the upper synchronous belt mechanism and the lower synchronous belt mechanism. According to the invention, the pressure exerting mechanisms are used for exerting pressures on the clamping and contact segments of the synchronous belts, so that the clamping and contact segments can clamp the measured object all the time under the pressure effect. Therefore, the slipping phenomenon can be avoided and thus the stable synchronization performance can be realized during the whole metering process, thereby improving the length counting precision. Meanwhile, the running of the whole mechanism becomes smooth and stable, thereby substantially reducing the influence on the length counting precision by shaking.

Description

technical field [0001] The invention relates to a length measuring device, in particular to a meter counting device which can be used to measure the length of cables and other materials with continuous length. Background technique [0002] In the production, sales and use of fields such as printing, compounding, slitting and winding, there is a demand for accurate measurement of length. At present, the usual measurement method is to use a meter counter to measure, and the accuracy of the meter counter will be directly measured. It affects the accuracy of measurement of products such as cables. [0003] Commonly used mechanical meter counters include wheel meter counters and crawler meter counters. Among them, the wheel meter counters use the pressing wheel to squeeze the cable to make friction between the cable and the measuring wheel and then synchronize. Movement, thus relying on the circumference of the measuring wheel and the number of rotations to count the meter. Sinc...

AI Technical Summary

Problems solved by technology

[0003] Commonly used mechanical meter counters include wheel meter counters and crawler meter counters. Among them, the wheel meter counters use the pressing wheel to squeeze the cable to make friction between the cable and the measuring wheel and then synchronize. Movement, thus relying on the circumference of the measuring wheel and the number of rotations to count the meter. Since the measuring wheel of the wheeled meter counter is in point contact with the cable under test, the friction between the two is small, and it is very easy during the measurement process. It is easy to slip, that is, the synchronization is poor, and the measuring wheel is easy to wear during use, which will cause a large meter error in the actual measurement of the wheel meter counter

Chinese patent document CN101625226A discloses a mechanical meter counter, that is, a crawler-type meter counter, which utilizes four synchronous pulleys in pairs to form two upper and lower endless synchronous belt mechanisms, and uses a pressing mechanism to make the two The synchronous belt mechanism clamps the measured cable so that the cable moves synchronously with it to measure the length. Although the meter counter uses a synchronous belt, which increases the contact area with the cable, due to the The part of the contact section that is in contact with the cable under test is suspended. In actual measurement, this part seems to be in close contact with the cable, but its normal pressure on the cable is negligible, and its contribution to the normal pressure of the cable is The size depends on the tension of the synchronous belt and the clamping force of the upper and lower synchronous belt mechanisms, so the positive pressure of the contact section on the cable is far less than the positive pressure of the upper and lower pulleys on the cable, and the other is easily affected Due to the influence of factors such as device wear and jitter during the measurement process, the friction between the synchronous belt and the measured object is unstable, and the synchronization is unstable, resulting in meter counting errors; in addition, the crawler meter meter Due to the great difference between the positive pressure of the contact section on the cable and the positive pressure of the pulley on the cable, the working effect of the upper and lower synchronous belt mechanisms is basically the same as the synchronous work of two sets of synchronous pulleys wrapped on the upper synchronous belt. , which is equivalent to two points of contact with the cable under test, so although the existing crawler-type meter counters have improved meter counting errors compared with wheel-type meter counters, they also have defects such as slipping and shaking, especially For twisted cables, since the high point on the corresponding busbar is intermittent, the phenomenon of slipping and shaking will be more obvious and frequent, resulting in unstable synchronization and large error in meter counting

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