Pore adapter

Abstract

The invention provides a hole adapter with good stability, which comprises a hollow cylinder. A plug, a spring and a core shaft are arranged at the hollow inside of the cylinder. The plug and the core shaft are connected with each other by the spring. The plug is fixed in the cylinder. At least three through holes are symmetrically arranged on the cylinder. Steel balls are arranged in the throughholes. In the invention, a bolt hole which is used for installing a tract fastening part is directly used for arranging an arrangement device of a prism. Errors of the spatial attitude of a track plate reflected by the prism can be lowered to the minimum. The hole adapter closely clings to the bolt hole, therefore, the relation between the position of the center of the prism and the bolt hole is very stable. Simultaneously, due to the small volume of the hole adaptor, the influences of environment and temperature on the stable relation are limited. Therefore, no calibration on the relation isrequired during the using process. The hole adaptor of the invention can not be matched with bolt holes on different tract plates. Simultaneously, the hole adaptor is not only applied to the measurement of track plates but also applied to other fields.

Description

technical field [0001] The present invention relates to a hole adapter. Background technique [0002] The slab ballastless track is a track structure with less maintenance. It uses two-way prestressed concrete track slabs and emulsified asphalt cement mortar to replace the sleepers and granular ballast of traditional ballasted tracks, so that the wheel-rail force is evenly distributed and transmitted to the Based on the subgrade, it is widely used in high-speed railways such as intercity rail transit, passenger dedicated lines, and mixed passenger and cargo lines. In the construction of slab-type slag-free track, it is necessary to accurately stake out the track slab to the design value, and the spatial position of the track slab can be reflected by multiple prisms with a fixed geometric relationship with the track slab. At present, there are generally two ways to fix the geometric relationship between the prism and the track plate: 1) Use a wooden tripod to fix the prism, ...

AI Technical Summary

Problems solved by technology

These two methods have the following disadvantages: the tripod and the frame are large in size, the ambient temperature has a great influence on their stability, and they need to be calibrated during use

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