Large stroke precision two-stage electric cylinder

Abstract

The invention relates to a large-stroke precision two-stage electric cylinder. The large-stroke precision two-stage electric cylinder comprises a two-stage piston assembly, an electric input assemblywhich provides power for the expansion and contraction of the two-stage piston assembly and a cylinder body assembly with the cross section being square, wherein the electric input assembly is fixed on the cylinder body assembly, the two-stage piston assembly is sleeved in the cylinder body assembly, one end of the two-stage piston assembly is in transmission connection with the electric input assembly, and the other end of the two-stage piston assembly stretches out of the cylinder body assembly. The large-stroke precision two-stage electric cylinder is characterized in that the two-stage piston assembly comprises a first-stage lead screw piston assembly which is in transmission connection with the electric input assembly and a second-stage lead screw piston assembly which is coaxially installed in the first-stage lead screw piston assembly, the first-stage lead screw piston assembly is in transmission connection with the second-stage lead screw piston assembly, the movement of a leadscrew of the first-stage lead screw piston assembly drives the second-stage lead screw piston assembly to synchronously move, and synchronous expansion and contraction of the first-stage lead screw piston assembly and the second-stage lead screw piston assembly are achieved. The large-stroke precision two-stage electric cylinder is small in installation space, capable of meeting large-stroke requirements, high in transmission speed, high in use reliability and high in durability and stroke precision.

Description

technical field [0001] The invention relates to an electric telescopic cylinder, in particular to a large-stroke precision two-stage electric cylinder, which belongs to the technical field of electric cylinders. Background technique [0002] With the higher and higher requirements of factory automation, electric cylinders came into being. The so-called electric cylinder (also known as electric actuator) is to use various motors (such as servo motors, stepping motors, electric motors) to drive various screws (such as sliding screws, ball screws) to rotate, and convert them into linear motion through nuts, and push The sliding table makes a reciprocating linear motion like a cylinder along various guide rails (such as sliding guide rails, ball guide rails, and high-rigidity linear guide rails). In order to meet different requirements, electric cylinders have various specifications and different names, such as: electric slide table, linear slide table, industrial mechanical ar...

AI Technical Summary

Problems solved by technology

However, in actual production and use, there are usually occasions where the installation space is small and the required working stroke is long, or the working stroke will change. Although such a single-stage electric cylinder can meet the small installation space, it cannot meet the work requirements. travel requirements

If the stroke of the single-stage electric cylinder is lengthened, the electric cylinder will become bulky, and its installation space will be large. Extending the stroke will cause the electric cylinder to work unstable, which will affect the transmission speed, working accuracy and service life of the electric cylinder

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