Floating nut mechanism

Abstract

The invention discloses a floating nut mechanism, which belongs to the field of mechanical techniques. According to the floating nut mechanism, a lifting block is fixedly connected with a connecting bracket, and a pin shaft is fixed to the outer side surface of the connecting bracket by a pin; an inner hole of a knuckle bearing sleeves the pin shaft, and an outer threaded rod of the knuckle bearing passes through a through hole of a nut seat and is connected by a hexagon nut; a lower spherical washer and an upper spherical washer are respectively arranged among the nut seat and the knuckle bearing and the hexagon nut; and a driving nut is fixed to the nut seat, and the driving nut sleeves a screw. According to the floating nut mechanism, a swing mechanism formed by the knuckle bearing is utilized, so that two-way floating of the nut is realized, the non-concentric error of the screw and the nut can be eliminated in a driving process, and the floating nut mechanism is especially suitable for occasions with heavy load, insufficient mechanism rigidity and large machining error, so that a mechanical structure is conveniently assembled and adjusted, and the movement life of the mechanism is obviously prolonged.

Description

[0001] Technical field: [0002] The invention relates to a floating nut mechanism, which belongs to the technical field of machinery. [0003] Background technique: [0004] Ball screw is a mature and standardized industrial standard product, which is widely used in tool machinery, precision machinery and other automation equipment. It is characterized by high precision, reversibility and high efficiency. It is precisely because of the above characteristics that it also puts forward high requirements for the processing, manufacturing and installation of equipment parts. Although it has been reported that the nut of the ball screw is connected with the movable parts of the equipment by using a plane floating nut seat, which improves the accuracy requirements of the installation, it still has the problem of complex structure and inability to float in multiple directions. [0005] In the screw nut mechanism, due to the bending deformation of the guide rail due to insufficient ri...

AI Technical Summary

Problems solved by technology

Although it has been reported that the nut of the ball screw is connected with the movable parts of the equipment by using the plane floating nut seat, which improves the accuracy requirements of the installation, but it still has the problem of complex structure and inability to float in multiple directions

[0005] In the screw nut mechanism, due to the bending deformation of the guide rail due to insufficient rigidity when some mechanisms are under heavy load, the screw and the nut will have a large misalignment. In some structures, the nut and the screw are split, and due to processing errors , also causes the screw and the nut to have a large non-concentricity, so in the transmission process, the screw is subjected to radial force and bending load, or the transmission is too loud, it is necessary to develop a new floating nut mechanism

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