Friction coefficient measuring device with rapidly assembled connecting block and knife return groove

Abstract

The invention discloses a friction coefficient measuring device with rapidly assembled connecting block and knife return groove. The friction coefficient measuring device comprises a base, a vertical column and a pendulum, wherein the vertical column is mounted on the base; the pendulum is rotatably mounted on the vertical column; the pendulum comprises a swinging rod and a pendulum bob mounted at the bottom end of the swinging rod; the pendulum bob comprises a bob shell; the bob shell is internally provided with a knife, a connecting block and a knife return groove; a small axle bearing is mounted at one end of the connecting block; the other end of the connecting block is connected with a tension spring; a groove for containing the knife return groove is formed in the upper surface of the connecting block; a first mounting hole is formed in each end of the knife return groove; through holes corresponding to the first mounting holes are formed in the groove; the side walls of the through holes are formed into a guide slope surfaces; the first mounting holes and the through holes are fixed through screws. The assembling efficiency of the connecting block and the knife return groove is high.

Description

technical field [0001] The application belongs to the technical field of measurement and control, and in particular relates to a pendulum friction coefficient measuring device. Background technique [0002] The anti-skid performance of road surfaces and airport runways is a key technical index related to the safety of vehicles and aircraft. With the development of transportation, the anti-skid problem of highways, urban roads and airport runways has attracted the attention of relevant departments. [0003] The pendulum friction coefficient tester (referred to as "pendulum instrument") is an instrument for measuring the surface friction coefficient of roads, airport runways, road markings, stones, etc. important basis. It is based on the basic principle that "the potential energy loss of the pendulum is equal to the work done by overcoming friction when the rubber sheet installed at the end of the swing arm slides over the surface to be tested" to measure the friction coeff...

AI Technical Summary

Problems solved by technology

[0004] Existing pendulum-type coefficient of friction tester generally comprises a base, a column installed on the top of the base, and a pendulum mounted on the column in rotation. The base includes T-shaped legs, and the three ends of the T-shaped legs are installed respectively. There is a leveling screw. The pendulum includes a pendulum and a pendulum installed at the bottom of the pendulum. The pendulum includes a hammer body shell and a knife, a connecting block and a knife return groove arranged in the hammer body shell. The problem is that the knife return groove is in the When it is fixed with the connection block, the tool return groove is easy to slide relative to the connection block, and it is difficult to locate; in addition, when it is fixed by screws, it is difficult for the screws to align with the screw holes, and the assembly efficiency is low

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