Hydraulic structure for controlling and clamping drill bit of drilling machine

Abstract

The invention discloses a hydraulic structure for controlling and clamping a drill bit of a drilling machine. The hydraulic structure comprises a cylinder, a cylinder bottom, a piston and a piston rod, wherein the cylinder is connected with the cylinder bottom in a welding mode to form a rodless cavity. Compared with a pull rod type hydraulic cylinder, the hydraulic structure not only has the advantages of being small in space necessary for screws and screw nuts, simple in structure, small in size, light in weight and the like, but also is capable of solving the problem of cylinder bottom leakage caused by aging of sealing parts at the cylinder bottom or other reasons; as an overlapped hydraulic control one-way valve is arranged on the outer wall of the cylinder bottom, pressure can be maintained when the drill bit is clamped by using the hydraulic cylinder; the piston is provided with a pressure control valve, so that the piston rod can be controlled to move, and furthermore the clamping force of the hydraulic cylinder for clamping a cutter can be controlled; the hydraulic cylinder works frequently, generally works in outdoor working environments, and repairing and maintenance conditions are poor, so that the stability of a moveable hydraulic cylinder needs to be improved; as a guide sleeve is made of high-strength cast iron, quality accidents can be avoided.

Description

technical field [0001] The invention relates to a mechanical transmission mechanism, in particular to a hydraulic structure for controlling and clamping a drill bit of a drilling machine. Background technique [0002] Hydraulic transmission has many outstanding advantages, so it is widely used, such as plastic processing machinery, pressure machinery, machine tools, etc. for general industrial use; engineering machinery, construction machinery, agricultural machinery, automobiles, etc. in walking machinery; Metallurgical machinery, hoisting devices, roll adjustment devices, etc.; flood control gates and dam devices, river bed lifting devices, bridge control mechanisms, etc. for civil and water conservancy projects; turbine speed control devices for power plants, nuclear power plants, etc.; deck lifting machinery for ships (Winch), bow door, bulkhead valve, stern propeller, etc.; giant antenna control device for special technology, measuring buoy, lifting and rotating stage, ...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is that when the hydraulic cylinder clamps the drill bit of the drilling rig, the pressure of the clamping drill bit needs to be kept constant, and the pressure of clamping the drill bit can neither be too large nor too small, and the hydraulic cylinder works frequently, and the work The environment is mostly open-air operations, and the maintenance conditions are poor, which easily affects the stability of the hydraulic cylinder. The purpose is to provide a hydraulic structure for controlling the clamping drill bit of the drilling rig to solve the above-mentioned problems

Images