Ball screw with lubricating device and lubricating device thereof

Abstract

The invention discloses a ball screw with a lubricating device and the lubricating device thereof. The lubricating device comprises an external member and a guide piece, wherein the external member is fixed on the end part of a nut and moves axially with the nut; the external member is provided with an accommodating hole for mounting the guide piece; the guide piece is provided with a second through hole and spiral parts; the rod shaft is inserted into the second through hole, and the inner edge of the second through hole is provided with a fixing part which is embedded with a guide groove mutually; a spiral groove is formed between the spiral parts; an oil outlet is formed on the end part of the spiral groove; and the spiral groove together with the accommodating hole of the external member forms a spiral guide path. Lubricating greases in the guide path go forward along the guide path during the running of the ball screw, and, when the lubricating greases reach the tail end of the guide path, a pressure is generated to delivery the lubricating greases from the oil outlets which are formed at the two ends of the guide path to the ball screw.

Description

technical field [0001] The present invention designs a ball screw and also designs a lubricating device. Background technique [0002] The ball screw is mainly composed of a nut screwed with the screw shaft through free rolling balls, and uses the free rolling balls to make the nut and the screw shaft slide relative to each other. Because of its excellent smoothness and precision, it is called It is widely used in various machines that require precision movement, such as various micro-processing or semiconductor process equipment, so the lubrication on the spiral track is very important. However, if the ball screw lacks lubrication for a long time, it may cause increased friction between the nut and the screw and accelerate the wear of the ball screw. [0003] In order to effectively reduce the wear of the ball screw due to friction, the lubrication system of the traditional ball screw can be divided into two types: the first is to hang the lubrication system on both ends o...

AI Technical Summary

Problems solved by technology

[0007] 1. If the spacer beads are worn out, they will have no lubricating effect, and if they are reduced to a certain size, they may cause ball jamming or interfere with the normal operation of rolling parts

[0008] 2. Relying on spacer beads as a supplement for lubrication, its supplementary efficiency is unstable and difficult to control, and it is easy to cause insufficient lubrication and shorten the life of the screw

[0009] In addition, if lubricating grease is used instead of lubricating oil, it can be applied to clean environments such as clean rooms in the electronic semiconductor industry, but the current lubricating devices require external power to push the lubricating grease to the inside of the ball screw (because the lubricating grease The fluidity is not high, so external power is required), so there are more basic accessories than all the above-mentioned lubricating devices, and it takes up a lot of space, and the relative cost is also high, so there is still a need for improvement the necessity of

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