Automatic lubricating device being suitable for nut-screw transmission mechanism

Abstract

The invention discloses an automatic lubricating device being suitable for a nut-screw transmission mechanism. The automatic lubricating device comprises at least one graphite nut, a baffle, a driving nut and a lead screw, wherein the graphite nut is sleeved on the lead screw, and the baffle and the driving nut are in rigid connection to clamp the graphite nut between the baffle and the driving nut, so that the graphite nut and the driving nut can synchronously move; the graphite nut is arranged in the driving nut, the lubricating device also comprises a torsion spring which is arranged on the graphite nut, and the thread of the graphite nut anticlockwise rotates to be clung to the two sides of the groove of the lead screw; and the cross section of the graphite nut is annular or semi-annual. According to the automatic lubricating device provided by the invention, solid is used for lubrication, the lubrication time is long, the volume is small, the lubrication action is realized by virtue of self motion of the nut-screw transmission mechanism only without maintenance, the structure is simple, the mechanism part is less, the working accuracy requirement is not high, and the maintenance is convenient.

Description

technical field [0001] The invention relates to an automatic lubricating device for a mechanism, in particular to an automatic lubricating device suitable for a nut screw transmission mechanism. Background technique [0002] At present, the doors of various rail vehicles mostly use a nut screw drive mechanism to open and close the door, and after the screw rod has been used for a period of time, microscopic valleys will be produced on the surface, especially on both sides of the groove, so that the opening and closing of the door is easy. It becomes unsmooth, so it is necessary to lubricate the screw rod. The traditional lubrication method is grease lubrication, that is, apply grease on the surface of the screw rod. However, since the nut screw drive mechanism is an open structure, the grease fluidity is poor, and the grease Generally, they are pushed to both ends of the screw with the movement of the nut, which cannot effectively lubricate the moving section of the screw th...

AI Technical Summary

Problems solved by technology

[0002] At present, the doors of various rail vehicles mostly use a nut screw drive mechanism to open and close the door, and after the screw rod has been used for a period of time, microscopic valleys will be produced on the surface, especially on both sides of the groove, so that the opening and closing of the door is easy. It becomes unsmooth, so it is necessary to lubricate the screw rod. The traditional lubrication method is grease lubrication, that is, apply grease on the surface of the screw rod. However, since the nut screw drive mechanism is an open structure, the grease fluidity is poor, and the grease Generally, they are pushed to both ends of the screw with the movement of the nut, which cannot effectively lubricate the moving section of the screw that needs to be lubricated. Therefore, it is necessary to frequently apply grease, which is troublesome to maintain, and the grease has a high temperature requirement. When the temperature is high, the grease will be dry and have no effect; when the temperature is low, the grease will condense, and the result is that the grease is pushed to both ends of the screw with the movement of the nut, and there is no way to effectively lubricate it. , in addition, due to the stickiness of the grease, it will be stained with dust during daily work, first of all, it is not beautiful, and secondly, the dust may affect the normal operation of the nut, and even cause damage to the screw rod

Now there is an improved product on the market, which changes the nut from metal to carbon fiber nylon polymer material, so that the effect of maintenance-free is achieved when the transmission mechanism is running, but its cost is high and it is not suitable for mass production

Images