Freight car bogie axle box positioning device

Abstract

The invention discloses a freight car bogie axle box positioning device. The freight car bogie axle box positioning device comprises an axle box body, a wheel set bearing arranged inside the cavity of the axle box body, an axle box end cover arranged at the external end of the cavity of the axle box body, an axle box elastic suspension system arranged between the top bearing platform of the rotating end of a positioning rotary arm and the front end of a frame, and a vertical hydraulic shock absorber arranged between the end portion of the frame on one side of the axle box body and the end portion of the rotating end of the positioning rotary arm; the fixed end of the positioning rotary arm is connected with a rotary arm seat at the bottom of the frame through an elastic positioning node combination; the axle box elastic suspension system comprises a rubber buffer pad, an internal steel spring, an external steel spring a first system rubber spring, wherein the top of the first system rubber spring is arranged on the upper end surface of the internal steel spring and the external steel spring. The freight car bogie axle box positioning device effectively reduce high-frequency impact during car high-speed running, and by means of the first system rubber spring with bearing and shock absorbing functions, the first system vertical stiffness of a loaded car working condition structural bogie can be increased, and stiffness variation of the axle box body of the structure bogie can be achieved.

Description

technical field [0001] The invention belongs to the technical field of component manufacturing of rail vehicle freight car bogies, and in particular relates to a freight car bogie axle box positioning device. Background technique [0002] With the rapid development of my country's railway freight, express freight cars have become an important development direction of railway freight cars. However, with the increase of operating speed, the traditional pivoting arm axle box positioning device of truck bogie can no longer meet the needs of the bogie series to relieve high-frequency disturbance, absorb vibration energy and provide elastic positioning; at the same time, the existing bogie Arm type axle box positioning device, the fixed end of the rotating arm is connected with the bogie frame through an elastic node, the rotating arm can rotate around the fixed end, the rotating end axle box of the rotating arm is divided into upper and lower halves, connected by bolts, and the w...

AI Technical Summary

Problems solved by technology

However, with the increase of operating speed, the traditional pivoting arm axle box positioning device of truck bogie can no longer meet the needs of the bogie series to relieve high-frequency disturbance, absorb vibration energy and provide elastic positioning; at the same time, the existing bogie Arm type axle box positioning device, the fixed end of the rotating arm is connected with the bogie frame through an elastic node, the rotating arm can rotate around the fixed end, the rotating end axle box of the rotating arm is divided into upper and lower halves, connected by bolts, and the wheel set bearing is clamped In it, the top of the swivel end has an elastic backing plate and a steel spring, which is supported under the frame to realize the elastic positioning of the wheel set. A hydraulic shock absorber is used between the end of the swivel end and the frame to absorb vibration energy. However, since the top of the swivel arm is elastic Steel springs are added to the backing plate, and the vertical stiffness of the positioning device is a constant value, which cannot effectively control the deflection difference of trucks turning to overhead and heavy vehicles. A single vertical hydraulic shock absorber cannot meet the requirements of different vibration damping forces for trucks turning to overhead and heavy vehicles. demand, and the pivot box of the pivot arm has no sealing structure, it is difficult to prevent pollutants such as cinders and dust from penetrating into the axle box when the truck is running

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