Gas meter accurate in counting and having anti-tamper structure

Abstract

The invention discloses a gas meter accurate in counting and having an anti-tamper structure. The gas meter comprises a meter case and a counter. The counter is provided with a counter wheel carrier which is clamped and fixed, and a counter housing. The counter housing is in a single-screw anti-tamper structure. The counter is provided with a counter wheel train with a change gear pair and a transition gear pair. A driving change gear forms the input end of the wheel train, and a driven change gear is tightly cooperated with a driving transition gear through a bulge loop section which is formed on the middle part of the driving transition gear. The driven change gear forms coaxial fixation through the driving transition gear, and is rotatably cooperated with an inner section of a supporting shaft. The driving transition gear is on the outer section of the supporting shaft. The inner side of the cooperation section of the supporting shaft is provided with a driven change gear spacing shaft shoulder. The front end of the cooperation section of the supporting shaft is provided with a crossette which stops the driving transition gear from withdrawing. The driven transition gear is connected with the first-level counter wheel of the counting wheel set through worm-gears. Beneficial effects of the gas meter are that counting is accurate, the counter wheel carrier is convenient and rapid in mounting and dismounting, and the counter housing has good anti-tamper structure.

Description

technical field [0001] The patent of the present invention relates to a gas meter counter component, in particular to a gas meter with accurate counting and anti-demolition structure. Background technique [0002] The measurement of gas consumption is realized by a gas meter. The gas meter includes a movement and a counter. The movement is arranged inside the watch case, and the counter is arranged outside the watch case. For the mechanical counter, the reciprocating swing of the inner bladder of the movement forms a rotary motion output through the conversion mechanism, and the mechanical counter drives the counting wheel to rotate through the gear transmission structure to achieve counting. The gear transmission system of the counter is usually equipped with an exchange gear pair and a transition gear pair. The exchange gear pair is used to meet the accuracy adjustment requirements by selecting different gear ratios and modulus exchange gear pairs when adjusting the gas me...

AI Technical Summary

Problems solved by technology

This leads to severe deformation of the matching hole between the driven transition gear and the support shaft in the gear set, resulting in inflexible rotation or jamming, and poor rotation accuracy, which affects the adjustment accuracy and adjustment efficiency.

In addition, the existing gear train and the mechanical counting wheel are also connected by gear transmission. The counting value can be implemented by directly adjusting the rotating counting wheel, and there is a hidden danger of artificial adjustment.

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