CN201090551Y

CN201090551Y - 1-3.5 T clearance buffer lifting oil cylinder with cylinder bottom one-way valve

Info

Publication number: CN201090551Y
Application number: CNU2007200368945U
Authority: CN
Inventors: 马庆丰; 周齐齐; 钟继萍; 王旭兵
Original assignee: Anhui Heli Co Ltd
Current assignee: Anhui Heli Co Ltd
Priority date: 2007-04-30
Filing date: 2007-04-30
Publication date: 2008-07-23
Anticipated expiration: 2017-04-30

Abstract

The utility model relates to a 1 - 3.5 T gap buffer lift cylinder provided with a check valve at the bottom, solving the problem of lifting and throttling of the current lift cylinder. The structural improvements of the utility model include that a small through hole is arranged in the radial direction at one side of the oil path on the cylinder bottom and is coaxially connected with a steel ball hole and a threaded hole; a bypassing oil path corresponded to the bottom of a piston is arranged on the bottom of the cylinder and vertically to the steel ball hole; a steel ball is arranged in the steel ball hole. The utility model is lifted smoothly without slow lifting phenomenon in a short time after the improvement of the current 1 - 3.5 T gap buffer lift cylinder; hydraulic oil throttling points are removed, hydraulic oil temperature is reduced and heat balance of a forkman is facilitated; the service lives of all related hydraulic parts and high-pressure rubber tubes are improved; the structure is simplified and the maintenance becomes more convenient.

Description

1-3.5T gap buffer lift oil cylinder with cylinder bottom one-way valve

Technical field

The utility model relates to the lift oil tank that is used for little tonnage fork truck tackling system.

Background technique

The lift oil tank that present stage is used for little tonnage fork truck tackling system has quite a few to adopt gap buffer mechanism, to play the purpose of the buffering that descends.The principle of gap buffer oil cylinder is to adopt the form of hydraulic throttle, control hydraulic oil oil return flow, thus the rate of descent of reduction goods has been eliminated the noise that produces owing to the bump that descends.Because its principle is simple, easy to make, cost is lower, so the application area of gap buffer is wider.But the cylinder buffer mechanism of existing form, though solved the buffer problem that oil cylinder descends, there is a unavoidable problem---rising throttling.Being created in of rising throttling reduced the efficient that hoists to a certain extent, reduced lifting velocity; Meanwhile, in the buffer time section that rises, greatly reduce hydraulic oil real work area, objectively improved working oil temperature, reduced each hydraulic parts and use stability in use, be unfavorable for fork truck work.

Summary of the invention

The utility model can solve rising throttling problem again in order to solve the decline buffering that can guarantee lift oil tank; Guarantee reliability of operation simultaneously, a kind of 1-3.5T gap buffer lift oil cylinder with cylinder bottom one-way valve is provided.

The Technological improvement plan of realizing the foregoing invention purpose is as follows:

1-3.5T gap buffer lift oil cylinder with cylinder bottom one-way valve, comprise cylinder body, piston, spool and cylinder bottom, spool is positioned at the piston spool bore corresponding with cylinder bottom, and spool is corresponding with the oil duct of cylinder bottom, be set with support ring and catch on the piston, valve core upper sleeve is equipped with copper sheathing;

Described cylinder bottom oil duct one side directly upwards is provided with a small through hole, and coaxial steel ball hole and the tapped hole of connecting of small through hole is provided with a bypass oil duct corresponding with piston base perpendicular to steel ball hole, cylinder bottom, is provided with steel ball in the steel ball hole, and tapped hole is provided with plug screw.

The diameter range of described small through hole is the 4-6 millimeter, the diameter range 5-6.5 millimeter of described bypass oil duct.

Useful technique effect of the present utility model is embodied in following several aspect:

1, the 1-3.5T gap buffer lift oil cylinder with cylinder bottom one-way valve hoist smooth and easy, the slow situation that hoists of no short time.

2, the utility model has been eliminated the hydraulic oil throttle point by the improvement to existing 1-3.5t gap buffer lift oil cylinder, has reduced hydraulic oil temperature, helps fork truck thermal equilibrium.

3, the utility model has improved the working life of each related fluid casting die and high-pressure rubber pipe.

4, it is simple, easy to maintenance to have a 1-3.5T gap buffer lift cylinder structure of cylinder bottom one-way valve.

Description of drawings

Fig. 1 is the utility model structural representation,

Fig. 2 is a lift oil tank cylinder bottom enlarged diagram.

Embodiment

Below in conjunction with accompanying drawing, the utility model is further described by embodiment.

Embodiment:

1-3.5T gap buffer lift oil cylinder with cylinder bottom one-way valve comprises cylinder body, piston 2, spool 5 and cylinder bottom 12, spool 5 is positioned at piston 2 spool bore corresponding with cylinder bottom, and spool 5 is corresponding with the oil duct of cylinder bottom 12, be set with piston Steel Cable Baffle Ring 1, support ring 3, U RunddichtringO 6 and catch 7 on the piston 2, be set with copper sheathing 4 and Steel Cable Baffle Ring 8 on the spool 5, see Fig. 1.

Oil duct one side of cylinder bottom 12 directly upwards has a small through hole 13, small through hole 13 coaxial communication are lived steel ball hole 14 and tapped hole 15, perpendicular to a bypass oil duct 16 corresponding with piston 2 bottoms arranged on steel ball hole 14, the cylinder bottom 12, steel ball 11 cooperations are loaded on and play one-way valves in the steel ball hole 14, connect bonded washer 10 and hexagonal spiro plug 9 on the tapped hole 15, seeing Fig. 1 and Fig. 2.

The diameter range of small through hole 13 is the 4-6 millimeter, and the diameter range 5-6.5 millimeter of bypass oil duct 16, steel ball 11 cooperate with small through hole 13 realizes switch, and the diameter of steel ball 11 is determined according to the diameter range of small through hole.

When the utility model lift oil tank hoists action, hydraulic oil enters the oil cylinder cylinder bottom from the A mouth, under pressure, flow to the E mouth of cylinder bottom oil duct D mouth and small through hole respectively, because the useful area very little (gap buffer) of cylinder bottom oil duct D mouth, so E mouth that flows to small through hole that hydraulic oil is a large amount of, and open one-way valve, hydraulic oil acts on the piston by bypass oil duct C mouth under the effect of pressure like this, make on the piston and move, drive simultaneously on the copper sheathing 4 and move, when after by whole cushion stroke, hydraulic oil begins to act on the piston by cylinder bottom oil duct D mouth, and lift oil tank is risen fully.When oil cylinder piston begins to descend, among the figure during the overlapping beginning of copper sheathing 4 and spool 5, one-way valve steel ball 11 cuts out one-way valve under the effect of hydraulic oil, make hydraulic oil without bypass oil duct C mouth, but from the slit oil return between copper sheathing 4 and the spool 5, because useful area is minimum, thereby reach the buffering purpose that descends.

Claims

1. have the 1-3.5T gap buffer lift oil cylinder of cylinder bottom one-way valve, comprise cylinder body, piston, spool and cylinder bottom, spool is positioned at the piston spool bore corresponding with cylinder bottom, and spool is corresponding with the oil duct of cylinder bottom, be set with support ring and catch on the piston, valve core upper sleeve is equipped with copper sheathing, it is characterized in that:

2. the 1-3.5T gap buffer lift oil cylinder with cylinder bottom one-way valve according to claim 1, it is characterized in that: the diameter range of described small through hole is the 4-6 millimeter, the diameter range 5-6.5 millimeter of described bypass oil duct.