Intensity checking method used for disc brake bracket

Abstract

The invention discloses an intensity checking method used for a disc brake bracket, which comprises the steps of: firstly, establishing a bracket and connecting bolt solution computational domain; secondly, determining an elasticity modulus and a Poisson ratio; thirdly, applying in-plane constraint to a bolt and applying normal constraint to a contact surface between the bracket and a framework according to a bolt precision level; fourthly, applying a uniformly distributed pressure to a bracket bearing region in partial contact with a metal portion of a brake lining; fifthly, establishing a bracket intensity calculation equation, and calculating the equation; sixthly, performing intensity calculation on the bracket based on the bracket material. The intensity checking method used for the disc brake bracket avoids the phenomena of no convergence and calculation impossibility caused by contact between the bracket and the bolt, and also considers a bending moment generated by a bolt cantilever effect as the bolt and the bracket are simplified into an integral body, reduces risk in maintenance and replacement of the bracket, removes subjectivity and randomness of the bracket intensity checking, shortens a bracket development period and reduces bracket development expense through correct checking of the bracket intensity.

Description

technical field [0001] The invention belongs to the technical field of disc brake design, and relates to a disc brake, in particular to a method for checking the strength of a disc brake bracket. Background technique [0002] Disc brakes are widely used in automobiles and ships because of their advantages such as large braking torque, good thermal stability, good braking performance and water stability, small size, small wear, easy automatic adjustment of gaps, and convenient maintenance operations. and other industries. [0003] Known disc brake is mainly made up of brake caliper and support two parts, and brake caliper is connected on the support by guide pin, and support is then connected on the braking object skeleton by bolt. When braking, the brake caliper can move axially along the guide pin. The main functions of the bracket are: 1) Through the bottom guide surface, it contacts the bottom surface of the brake pad. The guide surface slides until the friction plate i...

AI Technical Summary

Problems solved by technology

However, the known technology has strong subjectivity and arbitrariness in checking the strength of the bracket, and has the following defects: (1) usually establish an independent bracket and bolt model, and then establish contact between the bracket and the bolt, but because the bolt is relatively Many, often lead to non-convergence of contact calculations; for this reason, many analyzes ignore bolts and only impose constraints in bolt holes, but this simplified method does not consider the bending moment generated by the cantilever effect of bolts

(2) In the strength check of the bracket, the bolt accuracy has a great influence on the boundary conditions, and the known check methods often ignore the influence of the bolt accuracy, and directly impose constraints on all bolts or bolt holes, making the check inaccurate , not only increases the risk of bracket maintenance and replacement, but also increases the probability of safety accidents

(3) The load is simply applied on the side of the bracket that is in contact with the brake lining, but the bearing area of ​​the bracket in the actual working condition is only the area that is in contact with the metal part of the brake lining, and the load applied is the same as the actual The situation does not match, resulting in inaccurate strength calibration

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