CN2639592Y

CN2639592Y - Internal circulation oil cylinder of logical valve piston

Info

Publication number: CN2639592Y
Application number: CN 03268112
Authority: CN
Inventors: 黄步明
Original assignee: GUANGDONG ONLY MACHINERY CO Ltd
Current assignee: GUANGDONG ONLY MACHINERY CO Ltd
Priority date: 2003-07-29
Filing date: 2003-07-29
Publication date: 2004-09-08
Anticipated expiration: 2013-07-29

Abstract

The utility model relates to an inner circulation oil cylinder of logical valve piston, which comprises a piston, an oil cylinder and a piston rod; wherein the piston is a logical valve piston, which comprises a piston seat, a valve seat, and a valve cover. The piston seat is provided with two channels by which two oil cavities separated by the piston are guided in the oil cylinder, high pressure oil is respectively arranged in the channels of the piston rod and then enters the control oil room of the logical valve piston to actuate the valve cover to move so that the channels are interdicted or opened, when the channels are opened, oil liquids in two oil cavities are communicated and circulated back and forth, no outer channels of oil liquid circulation need to be arranged. The utility model has compact, simple and reliable structure, oil and energy saving, and rapid oil-cylinder travel action, and can meet the requirement that high-precision high-speed injection machine locks the oil cylinder and the die rapidly.

Description

A kind of interior circulating oil cylinder of logical valve piston

Affiliated technical field

The utility model relates to a kind of hydraulic pressure installation, relates in particular to a kind of hydraulic jack that is used for injection machine, plastics or shape machine, die casting machine, hydraulic press.

Background technique

Existing full hydraulic injection machine adopts a plurality of oil cylinders to carry out shifting formwork, matched moulds, locked mode, the operation process of die sinking, the to-and-fro motion of the logical valve control oil cylinder of hydraulic system, oil cylinder is interior by the fluid of separated two oil pockets of piston, need through hydraulic fluid port, joint, the external chennel that pipeline etc. are formed comes and goes two oil pockets of turnover that flow, finish out, the mold closing tool, for highi degree of accuracy, the high-speed injection machine that requires, for guaranteeing the Mode-locking oil cylinder of mold high speed locking, surely be in the high speed operation state, the fluid of two oil pocket must come and go at a high speed through external chennel and flow, to making oily temperature rise, expend the pressure oil energy, even can reduce oil, influence the hydraulic system proper functioning, the external chennel of fluid is easy to generate leakage, so need the quality of materials of access road, sealability, discharge value etc. propose higher requirement.

Summary of the invention

In order to overcome the above-mentioned shortcoming that existing Mode-locking oil cylinder exists, the utility model provides a kind of interior circulating oil cylinder of logical valve piston, its piston be one by valve gap, valve seat, the logical valve piston that piston seat constitutes, piston seat has passage, carrier frequency channel break in the logical valve control piston seat or open, just can be come and gone flow circuit through this passage by the fluid of separated two oil pockets of piston in the oil cylinder, thereby circulation in the fluid of two oil pockets in the realization oil cylinder, need not to establish again external chennel, shorten fluid greatly and come and gone the distance that flows, but reach the purpose of oil cylinder high-speed locking wheel mould, thereby overcome the shortcoming of prior art.

The technical scheme in the invention for solving the technical problem is: the piston in the oil cylinder is made into by valve gap, valve seat, the logical valve piston that piston seat constitutes, piston seat has the passage of linking up two oil pockets being separated by piston in the oil cylinder, piston seat and valve gap, valve seat constitutes two control grease chambeies of logical valve, piston rod has two internal channels that lead to logical valve control grease chamber respectively, with high pressure oil through the built-in two passes of piston rod be taken up in order of priority enter two control grease chambeies, promote moving of valve gap, just the passage in the piston seat can be opened or blocked, the fluid of two oil pockets just can come and go flow through passage when passage is opened, and realizes the purpose that the fluid of two oil pockets circulates in oil cylinder.

The beneficial effects of the utility model are compact structures, reliable, simple, can avoid oily temperature rise, and energy-conservation fuel-economizing, oil cylinder stroke action are accelerated, and satisfy highi degree of accuracy, the requirement of the high-speed quick locking mould of injection machine.

Description of drawings

The utility model is described in further detail below in conjunction with drawings and Examples:

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the working principle schematic representation of the utility model Mode-locking oil cylinder of being used as injection machine.

Among the figure: 1 oil pocket, 2 valve gaps, 3 valve seats, 4 piston seats, 5 oil cylinders, 6 piston rods, 7 oil pockets, 8 high-pressure oil passages, 9 valve gap stopping tables, 10 valve gap endoporus, 11 blocking-up control grease chambeies, 12 valve seat pillow blocks, 13 piston seats the 3rd shoulder hole, 14 connect control grease chamber, 15 piston seat passages, the outer frustum of 16 valve seats, conical ring in 17 piston seats, 18 piston seats, first shoulder hole, 19 piston seat passages, 20 valve seat shoulder holes, 21 valve seat pillow blocks, 22 piston seats, second shoulder hole, 23 valve seat shoulder holes, 24 valve seat pillow blocks, 25 platens, 26 moulds, 27 moving pattern plates, 28 mould shifting devices.

Embodiment

As shown in Figure 1, the utility model is made up of piston, oil cylinder, piston rod, and piston is the logical valve piston that is made of piston seat 4, valve seat 3 and valve gap 2, is separated into oil pocket 1 and 7 two oil pockets of oil pocket by piston in the oil cylinder 5; Piston seat 4 one ends and valve gap 2 one ends are fixedly connected and constitute logical valve control oil pocket with valve seat 3, piston seat 4 is provided with three shoulder holes that increase gradually, first shoulder hole 18 communicate with oil pocket 7 (passage 19), second shoulder hole, 22 inwalls have the access ramp 15 that communicates with oil pocket 1, the 3rd shoulder hole 13 cooperates formation logical valve control oil pocket with valve gap 2, and be fixedly connected with valve gap 2, first shoulder hole 18 and second shoulder hole, 22 transition joints are provided with interior conical ring 17; Valve seat 3 is provided with three pillow blocks, the outer frustum 16 that pillow block 21 heads are provided with is corresponding with the interior conical ring 17 of piston seat 4, pillow block 24 is formed logical valve control oil pocket with the 3rd shoulder hole 13 of piston seat 4, pillow block 12 will be controlled oil pocket and be separated into blocking-up control grease chamber 11 and connect control grease chamber 14, valve seat 3 is provided with two

shoulder holes

23,20, shoulder hole 23 connects with piston rod 6 binding threads, and shoulder hole 20 cooperates with piston rod 6 pillow blocks location; The stopping table 10 that valve gap 2 is provided with cooperates with the 3rd shoulder hole 13 of piston seat 4 and constitutes logical valve control oil pocket, the endoporus 9 of valve gap stopping table 10 settings and second shoulder hole, 22 concentrics of piston seat 4, and with the pillow block 24 of valve seat 3 movingly; Have two passages 8 that feed high pressure oil in the piston rod 6, connect the blocking-up control grease chamber 11 of logical valve respectively and connect control grease chamber 14, when high pressure oil enters blocking-up control grease chamber 11 or connects control grease chamber 14 from passage 8, drive with valve seat 3 valve gap 2 movingly and move on a small quantity, the interior conical ring 17 of piston seat 4 and valve seat 3 corresponding outer frustums 16 touch and close or leave, the access ramp 15 and the passage 19 of piston seat 4 will be blocked or open to valve seat 3, and blocking-up or connection oil pocket 7 circulate in flowing with the fluid of oil pocket 1 is round.

Narrate the utility model below in conjunction with Fig. 2 and be applied to the working principle that injection machine is made Mode-locking oil cylinder: see Fig. 1,2, oil cylinder 5 is installed in all-hydraulic injection machine platen 25 1 sides (Mode-locking oil cylinder is in opening state), the mould shifting device 28 that is installed in platen 25 is with moving pattern plate 27 matched moulds that moves to right, engage until mould 26, this moment, high pressure oil entered the blocking-up control grease chamber 11 of logical valve from the passage 8 of piston rod 6, promoting valve gap 2 moves to right in a small amount, the interior conical ring 17 of piston seat this moment touches to close with the outer frustum 16 of valve seat and closes, passage 19 and access ramp 15 that the blocking piston seat is provided with, end oil pocket 1 and the round interior circulation of flowing of the fluid of oil pocket 7, high pressure oil enters oil pocket 7 through the outer pit canal of piston seat the 3rd shoulder hole 13 simultaneously, the platen 25 that promotion and oil pocket 5 are fixed, with mould 26 lockings, finish until injection moulding, high pressure oil stops input, high pressure oil changes the connection control grease chamber 14 that enters logical valve from piston rod 6 another passages 8, promotion valve gap 2 resets and moves to left, the outer frustum 16 of valve seat is separated with conical ring 17 in the piston seat, open piston seat passage 19 and access ramp 15, the fluid of oil pocket 7 just can be through passage 19 and access ramp 15 and the round interior circulation of flowing of the fluid of oil pocket 1, mould shifting device 28 is pushed moving pattern plate 27 divided mould 26 open simultaneously, until finishing die sinking, so repeat to implement the locking of injection machine mould, open.

When the utility model is implemented, the valve gap 2 of logical valve can also be installed on the piston rod 6, and valve gap 3 and piston rod 6 are for movingly.

Fig. 1 is a Figure of abstract of the present utility model.

Claims

1. circulating oil cylinder in the logical valve piston, by piston, oil cylinder and piston rod are formed, it is characterized in that piston is by piston seat (4), valve seat (3), the logical valve piston that valve gap (2) constitutes, piston seat (4) has links up in the oil cylinder (5) by separated two oil pockets (1 of piston, 7) passage (15,19), have two passes (8) in the piston rod (6) and control grease chamber (11 with logical valve respectively, 14) communicate, the passage (8) that high pressure oil is provided with in piston rod (6) successively enters logical valve control grease chamber (11,14), promoting valve gap (2) moves, just can be with the passage (15 of piston seat (4), 19) block or open, the fluid of two oil pockets can circulate in round the flowing of passage through opening.

2. circulating oil cylinder in the logical valve piston according to claim 1, it is characterized in that piston seat (4) is provided with three grades of shoulder holes (18,22,13) that increase gradually, first shoulder hole (18) communicates with high-voltage oil cavity (7), second shoulder hole (22) inwall has the access ramp (15) that communicates with oil pocket (1), the 3rd shoulder hole (13) cooperates formation logical valve control oil pocket with valve gap (2), and be fixedly connected with valve gap (2), first shoulder hole (18) is provided with interior conical ring (17) with second shoulder hole (22) transition joint.

3. circulating oil cylinder in the logical valve piston according to claim 1 and 2, it is characterized in that valve seat (3) is provided with three pillow blocks (21,24,12), it is corresponding with the interior conical ring (17) of piston seat (4) that pillow block (21) head is provided with outer frustum (16), pillow block (24) constitutes logical valve control oil pocket with the 3rd shoulder hole (13) of piston seat (4), pillow block (12) will be controlled oil pocket and be separated into blocking-up control grease chamber (11) and connect control grease chamber (14), valve seat (3) is provided with two shoulder holes (23,20), shoulder hole (23) connects with piston rod (6) binding thread, and shoulder hole (20) cooperates with piston rod (6) pillow block location.

4. according to circulating oil cylinder in claim 1 or the 2 or 3 described logical valve pistons, it is characterized in that valve gap (2) is provided with stopping table (10) and cooperates formation logical valve control oil pocket with the 3rd ladder (13) of piston seat (4), the endoporus (9) that valve gap stopping table (10) is provided with and second shoulder hole (22) concentric of piston seat (4), and with the pillow block (24) of valve seat (3) movingly.