Oil return structure of hydrostatic trigger

Abstract

The invention discloses an oil return structure of a hydrostatic trigger which belongs to a safe scavenging device that is additionally arranged on the hydrostatic trigger and has speed regulating function. The hydrostatic trigger comprises a base, an outer casing, an oil cylinder and a pump body which are respectively fixed on the base, an oil storing cavity which is formed between the outer casing and the oil cylinder, a piston rod which is arranged in the cavity of the oil cylinder and is provided with piston components that are arranged on a bottom end part, a top cap which is respectively connected with the outer casing and the top of the oil cylinder and is used for supporting the piston rod and a pump core which is arranged in the pump body. The scavenging structure of the hydrostatic trigger is characterized in that the base of the hydrostatic trigger is also provided with a spill valve which comprises a spill valve body, a spill valve rod, a first spring, a steel ball, a second spring, a washer, a third spring and a throttle valve body. The scavenging structure of the hydrostatic trigger has the advantages that the scavenging structure is simple; the scavenging structure facilitates the processing and the assembly of parts and the maintenance is convenient; quick drop during the idle loading and slow drop during the loading can be ensured.

Description

technical field [0001] The invention relates to an oil return structure of a hydraulic jack, which is installed on the base of the hydraulic jack, and realizes a slow drop by controlling the flow of the hydraulic medium when the load drops, and belongs to the safety return structure with speed regulation function added on the hydraulic jack. oil device. Background technique [0002] The hydraulic jack oil return structure currently on the market mainly includes a pressure relief valve rod and a steel ball in the pump chamber on the base of the hydraulic jack. The medium enters the pump cavity from the cylinder chamber of the oil cylinder through the oil passage on the base, and returns to the oil storage chamber of the jacket through another oil passage on the base. This oil return structure can maintain a steady descending speed when descending with no load, but when the load descends, due to the increase in the internal pressure of the cylinder cavity, the flow rate of t...

AI Technical Summary

Problems solved by technology

The principle of this technical solution is the same under the action of no-load and loaded states, and it is slow to drop when it starts to release, and its efficiency is low, and this technical solution still has the defects of complex structure, difficult processing, and troublesome operation and use, and there are Potential safety hazard of slow descent failure due to damage to seal end seals

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