CN2246206Y

CN2246206Y - Piston plunger-type extension hydrautic oil cylinder

Info

Publication number: CN2246206Y
Application number: CN 96229225
Authority: CN
Inventors: 李西兰
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-02-02
Filing date: 1996-02-02
Publication date: 1997-01-29
Anticipated expiration: 2006-02-02

Abstract

The utility model relates to a piston plunger-type telescopic hydraulic oil cylinder. A large piston is arranged below plunger rods of the traditional hydraulic oil cylinder, a small hole is arranged on the large piston, and oil liquid is filled in a cavity between two plunger rods and is pressed into the cavity along with the lifting of the large piston so that the inner plunger rod is lifted. Because the compression area of the large piston is larger than that of the traditional plunger rod, the utility model has low power consumption under the condition of the same manufacturing material and lifting weight so as to have obvious energy saving.

Description

The piston type hydraulic jack that stretches

The utility model relates to a kind of telescopic hydraulic jack, particularly adopts the telescopic cylinder of piston type.

Present self-tipping type tipping truck, the telescopic hydraulic jack that its lifting structure is made up of multistage cylinder.The multistage column stopper rod of this oil cylinder is as telescopic antenna, the final section sectional area is less, as NJ131-75 agricultural machinery promulgated by the ministries or commissions of the Central Government 2TG1-Z0X250 type, automobile 5QTG140 * 150 type oil hydraulic cylinders etc., it stretches out the plunger rod maximum diameter and is respectively 70 and 140 millimeters, because active area is all less, influenced the election power of whole cylinder.As simple increase active area, will increase material and power consumption.The mounting point does not allow yet simultaneously.

The purpose of this utility model is to provide a kind of election power strong, does not enlarge the piston formula energy saving cylinder of plunger end area and increase Master Cost and power consumption again merely.

The purpose of this utility model is achieved in that two plunger rod D in cylinder tube ₁, D ₂, comprise oil cylinder three the be nested together ring-like chamber S of each self-forming, Q, fill with hydraulic oil in the chamber, plunger rod D ₁Have aperture d, can make hydraulic oil pour in the S chamber, during work under the oil pressure effect, big piston D ₀Lifting, fluid is poured into to the S chamber in the extruding Q chamber, forces plunger rod D ₂Soaring, the jack-up weight.Because big piston D ₀Be subjected to the oil pressure area more much bigger than traditional plunger rod area, under equal conditions, obviously, firmly to fill in hydraulic jack big than traditional for the election power that acts on weight, thereby reach energy-conserving action.

The utility model is by changing simple plunger rod hydraulic lifting the jacking of into piston formula, under the situation that does not increase Master Cost and power consumpiton, it is little to have overcome traditional telescopic plunger cylinder acting surface well, the deficiency that election power is limited, material, the energy have been saved again, for the utilization efficiency that improves hydraulic jack has been opened up wide prospect.

Provide embodiment below in conjunction with accompanying drawing.

Accompanying drawing is the utility model sectional drawing.

The utility model mainly is made up of following part, plunger rod D ₁, D ₂, S, Q chamber, d hole, big piston D ₀, cylinder tube 1, one-way valve 2.As shown in the figure, with plunger D ₁The centre hollows out and does not dig through, and makes it to form a space S, and establishes a big piston D below.At cylinder tube 1 inwall and plunger rod D ₁Form a space Q between the external diameter, at plunger rod D ₁Bore aperture d below, S, Q chamber are communicated with, the hydraulic oil that boils is annotated in Q, S chamber by one-way valve 2.At big piston D ₀Give pressure oil liquid below, big piston D ₀I.e. jack-up upwards, this moment, the space in Q chamber reduced, and fluid wherein is again incompressible, because Q, S be communicated with, so the fluid in S chamber must be with plunger D ₂Jack-up makes progress.If with big piston D ₀Size design can jack-up 5 tons of weights, then minor diameter D ₂5 tons of weights of the synchronous jack-up of plunger.Certain diameter D ₂Pressure on the end face unit area is greater than D ₀Pressure on the piston unit area.

This kind cylinder structure has energy-conserving action than traditional cylinder structure, attempts an example.If traditional plunger D ₂₁Diameter is 50 millimeters, and the weight W=3140kg of jack-up (these two data are agricultural telscoping hydaulic cylinder data) is as with weight W jack-up, then plunger diameter D ₂₁The pressure of following fluid is P ₁=W/A ₁=160kg/cm ²(A in the formula ₁=π D ₂ ²/ 4).As by now designing cylinder structure, weight W is constant, and then oil liquid pressure is P ₂=W/A ₂=86.5kg/cm ²(A in the formula ₂=π D ₀ ²/ 4, D ₀=68 millimeters).Example shows that under raw material, processing dimension, the essentially identical situation of lifting weight, the oil liquid pressure that now designs oil cylinder is more much smaller than traditional oil cylinder, and promptly the required input power of oil pump is also much smaller, thereby has tangible energy-conserving action.If adopt the cylinder structure of existing design to be used for dump truck, farm cart as tumbling the compartment, the self-unloading weight then can be saved more energy.

Claims

1. the flexible hydraulic jack of a piston type is mainly by plunger rod (D ₁, D ₂), cylinder tube (1) forms two plunger rod (D ₁, D ₂) be nested in the oil cylinder, leave (S, Q) two cavitys therebetween, it is characterized in that: at plunger rod (D ₁) bottom is connected with big piston (D ₀).

2. hydraulic jack according to claim 1 is characterized in that: at plunger rod (D ₁) bottom has aperture (d).

3. hydraulic jack according to claim 1 is characterized in that: at big piston (D ₀) on one-way valve (2) is arranged, one-way valve (2) bottom is communicated with cylinder tube (1).