Mandrel fixing device for cold disassembly of scraper hoist and mandrel cold disassembly method

Abstract

The invention belongs to the technical field of mechanical equipment, and particularly relates to a mandrel fixing device for cold disassembly of a scraper hoist and a mandrel cold disassembly method. The mandrel fixing device for cold disassembly of the scraper hoist comprises a triangular support and two fixing bolts arranged at the upper part of the triangular support. The mandrel fixing device is characterized in that a mandrel fixing pin is arranged on one fixing bolt; a fixing steel wire is connected between the two fixing bolts; the mandrel fixing pin comprises a fixing end and a cylindrical pin; the fixing end sleeves one fixing bolt; and the cylindrical pin is inserted in an end opening of a mandrel. According to the mandrel fixing device, the pressing plate fixing mode is changed, the mandrel can be effectively prevented from rotating, disassembly is easy, damage of hot disassembly to the mandrel and a bearing is eliminated, service life of a sun wheel, a planet wheel and the bearing in the scraper hoist is prolonged, maintenance time is shortened, and consumption of materials and spare parts is reduced; and besides, through utilization of the novel fixing device, a user only needs to screw off the fixing bolts during disassembly, and electrogas welding disassembly is not required.

Description

technical field [0001] The invention belongs to the technical field of mechanical equipment, and in particular relates to a mandrel fixing device for cold dismantling of an electric rake winch and a method for cold dismantling of the mandrel. Background technique [0002] Electric rake winch is a kind of ore transportation tool commonly used in underground mines. The main and auxiliary windings of the electric rake winch are composed of a tripod, sun gear, planetary gear, mandrel, ring gear, reel, bearings of each part, etc. The tripod and the reel are connected by a flat key. During the use of the electric rake winch, the tripod mandrels in the main and auxiliary drums often loosen and break, resulting in damage to the sun gear, planetary gear and bearing. [0003] At present, the fixing method of the tripod mandrel is to use the pressure plate at one end of the mandrel to fix it, that is, the arc of the fixed end of the mandrel is flattened first, and then the pressure pl...

AI Technical Summary

Problems solved by technology

The defect of this fixing method is that during the ore raking process, due to the large particle size of the ore, the impact changes greatly and the load changes greatly. Although the axial movement of the mandrel is not damaged, the pressure plate and the mandrel Long-term operation and abrasion will gradually cause the spindle to rotate. Once the spindle rotates, the shaft and hole will be worn at the same time, and the hole diameter will increase, causing a large radial runout of the planetary wheel. In severe cases, the spindle and tripod will be damaged. Fracture; due to friction and heat, the bearing will also be plastically deformed, gear pitting, gluing, gear teeth will be broken, and the raking winch will be locked, which will damage the motor reducer and parts; at the same time, it will also produce a lot of vibration and noise.

[0004] Since the breakage of the mandrel usually causes damage to the triangular bracket and the gear bearings of each part, it is necessary to disassemble and overhaul the electric rake winch

Due to the unreasonable fixing method of the current mandrel, when disassembling the mandrel, only the method of thermal disassembly can be used, that is, the method of gas cutting is used to cut off the planetary gear and bearing first, and then the mandrel is cut off by gas cutting

The disadvantage of this disassembly method is that the other two planetary gears and the sun gear in the tripod cannot work due to the splash of iron slag after the gas cutting, so one planetary gear or mandrel is damaged, and the other three must be repaired. Carrying out gas cutting dismantling, this dismantling method not only causes waste of materials and spare parts under non-destructive conditions, but also due to the small space in the tripod, the planetary gears and mandrels are processed one by one, which increases the maintenance man-hours and increases the number of gas welding

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