Vertical auxiliary loading device for bogie frame strength test

Abstract

The invention relates to a vertical auxiliary loading device for a bogie frame strength test, and belongs to the field of auxiliary loading devices for railway vehicle bogie frame strength tests. According to the invention, the vertical auxiliary loading device equivalently transfers an originally small vertical hydraulic actuator pressure loading torque to the outer side of an original vertical loading test stand through using a lever revolving arm and an L-shaped actuator connector in a matched manner so as to overcome a problem that a hydraulic actuator cannot load because of insufficient space. A spherical pair principle of a joint bulb arranged inside a connecting base can ensure that pressure of the hydraulic actuator is still kept to be vertically loaded to the lower end face of a stress loading point of a tested component in the vertical direction, thereby not influencing the precision of a test result. Usage of the lever revolving arm can significantly reduce configuration requirements of a rated driving force of the hydraulic actuator, thereby realizing the effects of reducing the test difficulty and saving the actuator purchase cost. In addition, the vertical auxiliary loading device also has the advantages of simple and practical structure, low cost, convenient popularization and the like.

Description

technical field [0001] The invention belongs to the field of auxiliary loading devices for bogie frame strength tests of railway vehicles, in particular to a vertical auxiliary loading device for bogie frame strength tests. Background technique [0002] Since the bogie frame of a railway vehicle is the core component that bears the weight of the car body and transmits traction and braking power, after the theoretical design is completed, it is usually necessary to carry out a load strength test on the bogie frame of the initial production. The frame strength test includes a static strength test and a fatigue strength test. The static strength test tests whether the frame will produce permanent deformation under the composite action of the maximum theoretical load by performing a static stress loading test on the frame, while the fatigue strength test is a continuous simulation of the train running In order to verify the rationality of the mechanical structure of the bogie fr...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem that the height of the vertical loading test bench for the existing bogie frame strength test needs to be adjusted frequently to meet the loading requirements of the vertical strength test of different types of bogie frames, and in special cases, the minimum vertical loading test bench The loading height is still greater than the maximum distance from the vertical loading point to the ground on the new low-floor bogie to be tested, resulting in the length of even the shortest hydraulic actuator being greater than the distance between the stressed loading point on the tested component and the iron floor of the test bench The situation of the maximum distance, resulting in the technical problem that the vertical strength loading test cannot be carried out. The invention provides a vertical auxiliary loading device for the bogie frame strength test

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