a pressure gauge

Abstract

Provided is a pressure gauge, comprising a gauge housing (1), a dial (2), a pointer (4), and a conversion structure for transforming the pressure and transmitting same to the pointer (4) to cause the pointer (4) to rotate; the conversion structure comprises a drive rod (3) capable of rotation, a drive base (5) capable of up-and-down motion, and a support spring (6); the pointer (4) is fixed to the upper end of the drive rod (3); the drive base (5) can be driven by air pressure to move upward; the drive base (5) is provided with a guide hole (51) for setting the drive rod (3); the support spring (6) is used in the drive base (5) for causing the drive base (5) to maintain a tendency of downward motion. The conversion structure of the present pressure gauge is simple and rational, and the screw thread fitting drive has good drive stability, such that the pressure gauge has good shockproof performance; there is no need for a complex lever structure or gear structure, thus the pressure gauge can be made very small; the structures of the components are simple, there are few mating relationships, and costs are significantly reduced.

Description

technical field [0001] The invention relates to a pressure gauge for detecting air pressure. Background technique [0002] The working principle of the pressure gauge is through the elastic deformation of the sensitive components (Bourdon tube, diaphragm box, bellows) in the gauge, and then the conversion mechanism of the movement in the gauge transmits the pressure deformation to the pointer, causing the pointer to rotate to display the pressure. Spring tubes (Bourdon tubes) are divided into type tubes, coil spring tubes, spiral tubes and other types. Generally, cold hardening material blank tubes are used, which have high plasticity in the annealed state. After pressure processing, cold hardening and qualitative treatment Get high elasticity and strength. Under the pressure of the inner chamber, the spring tube can conveniently transform the pressure into elastic displacement of the free end of the spring tube by utilizing its elastic characteristics. The measurement ran...

AI Technical Summary

Problems solved by technology

[0006] Due to the complex structure of the transmission part of the existing pressure gauge structure, the volume of the pressure gauge is large, and the requirements for materials and manufacturing precision are high, resulting in high cost, and the anti-seismic effect of the lever or gear transmission structure is extremely poor. The lever or gear transmission part of the pressure gauge will be damaged if it falls on the bottom surface

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