A kind of double acting Hydraulic Cylinder
The present invention relates to technical field of hydraulic oil cylinder, more particularly to a kind of double acting Hydraulic Cylinder.
Hydraulic Cylinder is usually used in having compared with high thrust, is used in the plant equipment for having very fast work speed again, it
Mainly there are a piston cylinder and a Combined Plunger-type Cylinder to form.Existing Hydraulic Cylinder, has faster speed when work is entered,
And in backhaul realized by the diameter of oversize piston bar, so that structure becomes huge, add production cost.
The content of the invention
In order to overcome above shortcomings part in the prior art, it is an object of the invention to provide a kind of double acting is fast
Fast hydraulic cylinder, it is driven big piston cylinder by valve piston cylinder, realizes quick return.So as to reduce the diameter of big piston rod, drop
Low production cost.Compact conformation, service life is longer.
In order to reach above-mentioned purpose, the present invention uses following concrete technical scheme：A kind of double acting Hydraulic Cylinder, bag
Cylinder barrel, big piston rod, small piston rod are included, wherein big piston rod includes big piston, small piston rod includes valve piston, the big piston
Bar is nested in cylinder barrel and no oil pocket is formed between cylinder barrel, and its end is fixed on cylinder barrel by trim ring, the small piston rod
It is nested in big piston rod and the first fluid chamber and the 3rd fluid chamber, the two ends of the small piston rod is formed between big piston rod
It is provided between big piston rod in guide sleeve, small piston rod and is provided with oil guide pipe, oil guide pipe is connected with the first fluid chamber, big piston
The second fluid chamber is formed between bar and small piston rod and cylinder barrel, small piston rod is provided with the first oil inlet and the second oil inlet, the
One oil inlet is connected with oil guide pipe, and the second oil inlet is connected with the 3rd fluid chamber, and the front end of cylinder barrel is provided with the 3rd oil-feed
Mouthful, cylinder barrel, which is provided with the exhaust outlet communicated with without oil pocket, exhaust outlet, is provided with air bleeder screw plug, the 3rd oil inlet and the second fluid chamber
It is connected.
Compared with prior art, the present invention has advantage following prominent and effect：Due to provided with above structure, the double cropping
Not only there is big thrust with Hydraulic Cylinder, with fast work speed, also with fast opening speed, reduce big piston rod
Diameter, so as to alleviate the weight of hydraulic cylinder, so not only reduce production cost, and extend the use of hydraulic jack
In the life-span, improve the normal operation rate of plant equipment.
Brief description of the drawings
Fig. 1 is structural representation of the invention；Fig. 2 is small piston rod component of the present invention；
The present invention is described in further detail below in conjunction with the accompanying drawings.
In order to which technical scheme is explained further, the present invention is explained in detail below by specific embodiment
As shown in figure 1, a kind of double acting Hydraulic Cylinder, including cylinder barrel 1, big piston rod 2, small piston rod 3, wherein big work
Stopper rod includes big piston, and small piston rod includes valve piston, and the big piston rod 2 is nested in cylinder barrel 1 and formed between cylinder barrel 1
Without oil pocket 4, the sealing problem of big piston rod is eliminated, its end is fixed on cylinder barrel 1 by trim ring 5, the small piston rod 3 is embedding
It is enclosed in big piston rod 2 and the first fluid chamber 11 and the 3rd fluid chamber 13, the small piston rod 3 is formed between big piston rod 2
Two ends and big piston rod 2 between be provided with guide sleeve 6, oil guide pipe 7, the fluid chamber 11 of oil guide pipe 7 and first are provided with small piston rod 3
It is connected, the second fluid chamber 12 is formed between big piston rod 2 and small piston rod 3 and cylinder barrel 1, the front end of cylinder barrel 1 is provided with the 3rd
Oil inlet 23, cylinder barrel 1, which is provided with the exhaust outlet 8 that is communicated with without oil pocket 4, exhaust outlet 8, is provided with air bleeder screw plug 9, and fluid is from the 3rd
Oil inlet 23 enters, and realizes larger thrust, in big piston and big piston rod movement, by the gas of oil-free intracavitary from exhaust outlet
8 discharges, the 3rd oil inlet 23 is connected with the second fluid chamber 12, and small piston rod 3 is provided with the first oil inlet 21 and the second oil-feed
Mouth 22, the first oil inlet 21 is connected with oil guide pipe 7, and the second oil inlet 22 is connected with the 3rd fluid chamber 13, the first oil inlet
21 by fluid through in the first fluid chamber 11, promote big piston rod and piston quickly to stretch out, realize Hydraulic Cylinder quick
Work is entered；Second oil inlet 22 inputs fluid in the 3rd fluid chamber 13, promotes big piston rod and big piston to retract, because the first oil
The volume of sap cavity 11 is small, it is achieved thereby that the quick return of Hydraulic Cylinder, the double acting Hydraulic Cylinder not only has big push away
Power, with fast work speed, also with fast opening speed, reduces the diameter of big piston rod, so as to alleviate hydraulic cylinder
Weight, so not only reduces production cost, and extends the service life of hydraulic jack, improves the normal of plant equipment
Example is merely illustrative of the technical solution of the present invention and unrestricted, although being carried out with reference to preferred embodiment to the present invention
Describe in detail, it will be understood by those within the art that, technical scheme can be modified or equivalent
Replace, without departing from the spirit and scope of technical solution of the present invention, it all should cover among scope of the presently claimed invention.