Combined type thread self-locking hydraulic oil cylinder

Abstract

The invention relates to the technical field of hydraulic power equipment, in particular to a combined type thread self-locking hydraulic air cylinder. The technical problem that an existing oil cylinder is poor in locking reliability and low in output force is solved. The oil cylinder comprises a cylinder barrel, a main piston and an auxiliary piston. The main piston is arranged in an inner cavity of the cylinder barrel, the right end of the main piston stretches out of the cylinder barrel, and external threads with the central axis of the main piston as the spiral axis are formed on the right circumferential face of the main piston. A driving motor and an annular gear are arranged on the cylinder barrel, a power output shaft of the driving motor is meshed with the annular gear, and the annular gear is meshed with external threads on the right portion of the main piston through internal threads of an inner ring. The main piston is provided with an auxiliary cavity, the auxiliary piston is arranged in the auxiliary cavity and divides the auxiliary cavity into a left sub-cavity and a right sub-cavity, the left end of the auxiliary piston penetrates through the left end cavity wall of the auxiliary cavity to stretch into a rodless cavity, and the right sub-cavity of the auxiliary cavity is communicated with the rodless cavity of the cylinder barrel through a shaft hole formed in the auxiliary piston. The oil cylinder can achieve reliable locking and is high in output force.

Description

technical field [0001] The invention relates to the technology of hydraulic power equipment, in particular to the technology of a composite threaded self-locking hydraulic oil cylinder. Background technique [0002] The hydraulic cylinder is a device driven by hydraulic pressure to output power. It is mainly composed of a cylinder and a piston. The inner cavity of the cylinder is closed as a whole, and the piston is installed in the inner cavity of the cylinder in a sliding fit. working cavity. When the hydraulic cylinder is working, one of the working chambers enters the oil, and the other works to return the oil, which can push the piston to slide and output power. [0003] When the hydraulic cylinder is working, in order to ensure the safety of the hydraulic cylinder, it is usually necessary to configure a hydraulic valve on the inlet and outlet hydraulic lines of the hydraulic cylinder to lock the hydraulic cylinder to ensure that the hydraulic cylinder will not be unst...

AI Technical Summary

Problems solved by technology

However, this method of using a hydraulic valve to lock the hydraulic cylinder has high requirements on the accuracy of the hydraulic valve, and there is internal interference in the spool of the hydraulic valve, so it is impossible to achieve absolute locking of the hydraulic cylinder, and there is a defect of poor locking reliability.

[0004] In addition, the output force of existing hydraulic cylinders is relatively low. In some working conditions that require high output force (such as civil foundation pit construction), multiple hydraulic cylinders are often required to cooperate with each other to output power at the same time. Therefore, the existing hydraulic cylinders The output power still needs to be improved

Images