Double-lead-screw linear mechanism of valve opening and closing structure

Abstract

A double-lead-screw linear mechanism of a valve opening and closing structure comprises a main body, a transmission gear shaft and lead screws, the transmission gear shaft is embedded in the top end of the main body, the lead screws are embedded in the middle of the main body, the top ends of the lead screws are attached to tooth marks of the transmission gear shaft through lead screw gears, and the lead screws are in transmission connection with the transmission gear shaft through the lead screw gears and the top end transmission gears. The reduction ratio can be changed through reasonable configuration, the load capacity can be effectively improved, the transmission ratio of the upper center gear to the circumferential lead screw gear is 1: 1 during normal delivery, but only the number of teeth of the gear needs to be adjusted, and the gear can be driven to rotate, so that the transmission ratio of the upper center gear to the circumferential lead screw gear is increased. Different rotation speed ratios can be obtained by adjusting the rotation speed of the nut, the relative position of the gear and the lead screw is controlled through the expansion sleeve, the problem that the circumferential gear is meshed with the center gear after the relation between the nut and the lead screw is adjusted is effectively solved, and equipment and transmission are well protected through over-torque slipping of the expansion sleeve.

Description

technical field [0001] The present invention relates to the technical field of valve opening and closing structure, and more specifically, relates to the technical field of a double-screw linear mechanism of a valve opening and closing structure. Background technique [0002] In construction machinery, it is often necessary to change the rotary motion into a linear motion. Commonly there are mechanisms such as nuts and screws, gear racks, chain sprockets, and rocker sliders. When opening and closing a device or performing some kind of reciprocating linear motion, everyone usually chooses the above types. Because the rack and pinion transmission directly drives the rack with the gear, it is often necessary to increase the reduction mechanism, and because of the relationship between the modulus and the load, a large load requires a large modulus, so there are shortcomings in the length control accuracy; the rotation of the sprocket is easy to move The rotary motion becomes li...

AI Technical Summary

Problems solved by technology

[0004] In summary, a double-screw linear mechanism with a valve opening and closing structure is provided to solve the problem of being unable to flexibly connect with the driving wire when connecting the traditional valve opening and closing structure because it needs to be used in conjunction with the nut on the valve stem. The problem of flexible connection of rods

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