Main bearing of heading machine as well as axial retainer and radial retainer of main bearing

Abstract

The invention discloses a main bearing of a heading machine as well as an axial retainer and a radial retainer of the main bearing. The axial retainer comprises a first annular main body, a plurality of first rollers are arranged on the first annular main body, the axis of each first roller intersects with that of the first annular main body, the first rollers form an annular shape and are concentric with the first annular main body, a first retainer guide block is fixed on the outer circular wall of the first annular main body, a second retainer guide block is fixed on the inner circular wall of the first annular main body, a first retainer support leg is fixed on the annular surface of one side of the first annular main body, a second retainer support leg is fixed on the annular surface of the other side of the first annular main body, the first annular main body is made of steel, and the first retainer guide block, the second retainer guide block, the first retainer supporting leg and the second retainer supporting leg are all made of copper alloy. On the premise of reducing the manufacturing cost, the damage of the retainer to a raceway surface and a flange surface on a ferrule can be reduced.

Description

technical field [0001] The invention relates to the technical field of cages in mechanical engineering, in particular to a roadheader main bearing and its axial cage and radial cage. Background technique [0002] The roadheader is a kind of construction machinery specially used for tunnel excavation construction. It can complete parallel and continuous operations in the construction procedures such as excavation, support, and slag discharge. Tunnel construction equipment for operations. With the needs of underground engineering and infrastructure construction such as railway tunnels, highway tunnels, water conservancy tunnels, and urban subways, roadheaders have developed rapidly around the world. [0003] The main bearing of the roadheader is a key component of the roadheader. It is located on the main drive system of the roadheader and plays the role of supporting and transmitting motion and load. Due to the harsh and uncertain working conditions of the roadheader, the ma...

AI Technical Summary

Problems solved by technology

During the operation of the main bearing, there is friction between the cage and the raceway surface and the rib surface, which is easy to damage the raceway surface of the main bearing, causing problems such as metal material falling off the raceway surface, and causing the main bearing to run stuck. work failure

[0005]In order to reduce the probability of the above failures and increase the safety and reliability of the main bearing operation, the main bearing generally adopts an all-copper structure cage, but the all-copper The manufacturing cost of the structural cage is relatively high, and higher requirements are placed on the casting and processing of copper alloys

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