High-speed direct connection spindle

Abstract

The invention relates to a high-speed direct connection spindle. The high-speed direction connection spindle comprises an engine body, a central spindle, a pull rod, a reset spring and an oil cylinder assembly, wherein the central spindle is pivoted in the engine body through an upper bearing and a lower bearing arranged at the upper end and the lower end of the engine body, and a conical hole is formed in the bottom end of the central spindle, wherein the diameter of the conical hole is increased from top to bottom in sequence; the lower end of the pull rod is connected with a pulling claw which is matched with the conical hole and used for fixing a cutter, and the upper end of the pull rod is fixedly provided with a cutter hitting disk; the reset spring is arranged between the central spindle and the pull rod; the oil cylinder assembly comprises a cylinder body positioned above the top of the engine body and a piston arranged at the interior of the cylinder body and used for propping against the cutter hitting disk downwards; the cylinder body is movably provided with a plurality of connecting pieces in a penetrating manner, the part, penetrating through the lower end of the cylinder body, of each connecting piece is fixedly connected to the engine body, and each connecting piece is connected with an elastic element in a sleeving manner. The cylinder body of the oil cylinder is arranged on the engine body in a floating manner, and the axial thrust applied to the central spindle when a cutter is assembled or disassembled on the oil cylinder can be counteracted, so that a bearing is protected from being damaged, and the service life of the bearing is prolonged.

Description

[0001] technical field [0002] The invention relates to a high-speed direct-coupled spindle. [0003] Background technique [0004] The current direct-coupled main shaft usually includes a machine body, a shaft core pivoted inside the machine body through bearings, a pull rod passing through the inside of the shaft core, and an oil cylinder assembly installed on the upper part of the machine body. The piston of the oil cylinder assembly is used to press the tie rod downward. , to complete the unloading process, the cylinder body of the oil cylinder is fixed on the machine body. This rigid connection makes the oil cylinder generate axial thrust on the bearing of the direct-connected main shaft during normal operation, which reduces the service life of the bearing. Specifically, The unloading force of the oil cylinder piston pushing down on the pull rod will be transmitted to the shaft core through the pull rod, so that the shaft core and the machine body will have a downwar...

AI Technical Summary

Problems solved by technology

[0004] The current direct-coupled main shaft usually includes a machine body, a shaft core pivoted inside the machine body through bearings, a pull rod passing through the inside of the shaft core, and an oil cylinder assembly installed on the upper part of the machine body. The piston of the oil cylinder assembly is used to press the tie rod downward. , to complete the unloading process, the cylinder body of the oil cylinder is fixed on the machine body. This rigid connection makes the oil cylinder generate axial thrust on the bearing of the direct-connected main shaft during normal operation, which reduces the service life of the bearing. Specifically, The unloading force of the oil cylinder piston pushing down on the pull rod will be transmitted to the shaft core through the pull rod, so that the shaft core and the machine body will have a downward movement trend in the axial direction. Pushing the bearing will seriously affect the matching accuracy of the inner ring and outer ring of the bearing and reduce the service life of the bearing

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