Pivot pin load cell used in railway switch mechanism

Abstract

The invention discloses a shaft pin type force measuring sensor used for a railway switching mechanism. The shaft pin type force measuring sensor comprises an elastomer, a sealing cover plate, a thread outlet nozzle and strain gauges, wherein the elastomer is in a shaft pin type shape and comprises a head and a cylinder part, a blind hole cavity is formed at the center of the elastomer, the sealing cover plate is connected with the head in a sealed mode and covers the cavity, the cylinder part is matched with pin holes of an actuating rod and a turnout pushing rod, two annular through slots are axially formed in an outer cylindrical surface at an interval, two groups of strain gauges are stuck on the inner wall of the cavity corresponding to the annular slots, the strain gauges are of a shear type, the width of each strain gauge in the axis direction of the elastomer is less than the width of each through slot on the axis, and central positions of the two groups of strain gauges on the axis are respectively consistent with the central positions of the two annular through slots on the axis. The shaft pin type force measuring sensor disclosed by the invention can monitor the magnitude for an acting force between the actuating rod and the turnout pushing rod in a turnout system action process in real time, has the characteristics of dust prevention, rust prevention and moisture resistance, and can operate stably under severe working conditions for a long time.

Description

technical field [0001] The invention relates to a pin type force measuring sensor used for a railway switch mechanism. Background technique [0002] The railway switch mechanism plays a huge role in ensuring the normal and safe operation of the railway system, and it is widely used in the huge railway network. It is of great significance to monitor and prevent the occurrence of faults in the switch. The magnitude of the force between the action rod of the switch mechanism and the push rod of the branch reflects the working state of the switch mechanism. The online real-time monitoring of this push-pull force can provide online monitoring and prevention of the fault of the switch mechanism. An effective measure to ensure the safe operation of the railway system. [0003] The pin-type load cell is used to replace the connecting pin between the action rod and the branch push rod in the switch mechanism. While satisfying the transmission of motion and force, it can also control...

AI Technical Summary

Problems solved by technology

[0004] The connecting pin currently used between the action rod of the switch mechanism and the branch push rod has specific dimensions, and is usually exposed to the wild natural environment, and the working conditions are complex and harsh. The seal of the shaft pin sensor used to replace the connecting pin , anti-rust, stability and other characteristics put forward high requirements, the existing shaft pin sensor can not meet the needs of use

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