Precise spindle transmission mechanism

Abstract

The invention discloses a precise spindle transmission mechanism. The precise spindle transmission mechanism comprises a spindle, a pipe, a shaft sleeve assembly and a sleeve; the pipe is arranged in the sleeve and is in interference fit with the sleeve; the spindle penetrates the pipe and is in clearance fit with the pipe; a plurality of oil injection holes are formed in the surface of the pipe; a liquid injection channel is formed in the end face of the front end of the spindle and communicates with the side face of the spindle; and the shaft sleeve assembly is arranged in the sleeve and installed at the rear end of the spindle. The precise spindle transmission mechanism has the beneficial effects that oil liquid passes through the liquid injection channel and is injected into the pipe through the oil injection holes in threads, the side face of the spindle can make complete contact with the oil liquid, and the lubricating and cooling effects are remarkable; and the oil liquid flows into an oil cavity through the pipe, the lubricating and cooling effects are achieved for the shaft sleeve assembly, the oil liquid can pass through oil inlet holes in a first friction ring and a second friction ring and cover the contact face of the first friction ring and the contact face of the second friction ring, and abrasion is reduced while the lubricating and cooling effects are achieved.

Description

technical field [0001] The invention relates to the field of rotating shafts, in particular to a precision spindle transmission mechanism. Background technique [0002] The main shaft refers to the shaft that receives power from the engine or motor and transmits it to other parts. In CNC machining equipment, the main shaft is a relatively common transmission mechanism. When performing high-precision and high-speed machining, the main shaft transmission mechanism has Larger burden, easy to wear, the spindle will generate a lot of heat when it runs at high speed, causing the spindle to heat up, so, unlike the low-speed spindle, the high-speed spindle often adopts oil mist lubrication, oil-air lubrication, jet lubrication and other lubrication methods , the so-called oil mist lubrication is to use compressed air, after purification, rely on a special spray device to spray the special oil into an atomized state, and use compressed air to force the oil mist into the bearing part ...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the disadvantages that the above-mentioned main shaft is prone to beating due to the gap between the bearings and the use of oil mist lubrication will cause environmental pollution when the above-mentioned main shaft is in operation, a precision main shaft transmission mechanism is provided, which can reduce the wear and tear of the main shaft and oil mist pollution, and improve the machining accuracy. Widely used in high-precision, high-efficiency, high-speed and low-speed CNC machining equipment

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