CN1514140A

CN1514140A - Internal circulation oil cylinder having built in logic valve

Info

Publication number: CN1514140A
Application number: CNA031399916A
Authority: CN
Inventors: 黄步明; 刘青平; 郭福泽
Original assignee: GUANGDONG HONGLI MACHINE CO Ltd
Current assignee: GUANGDONG HONGLI MACHINE CO Ltd
Priority date: 2003-07-29
Filing date: 2003-07-29
Publication date: 2004-07-21

Abstract

An internal circulation hydro-cylinder is composed of piston, hydro-cylinder, piston rod and logic valve. The piston has axial channel for two oil cavities isolated by piston rod in hydro-cylinder of guide channel, the logic valve is set on one side of the piston and closely fixed on the piston rod to make high-pressure oil go into oil control chamber of the logic valve separately through channels set on the piston rod so valve bush is pushed to move the block or open of axial channel of the piston rod as oil in two oil cavities flows forward and back ward within internal circulation. It is not necessary to set external channel for oil circulation.

Description

A kind of interior circulating oil cylinder of logic built valve

Affiliated technical field

The present invention relates to a kind of hydraulic pressure installation, relate in particular to a kind of hydraulic jack that is used for injection machine, plastics forming 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 invention provides a kind of interior circulating oil cylinder of logic built valve, its piston has passage and can link up in the oil cylinder by separated two oil pockets of piston, logical valve is placed in a side of piston and is anchored on the piston rod, the carrier frequency channel break of its may command piston or open, can be come and gone flow circuit through piston channel 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 go the distance that flows, but reach the purpose of oil cylinder high-speed locking wheel mould, thereby overcome the shortcoming of prior art.

The technological scheme that the present invention solves its technical problem is: install one by valve seat in oil cylinder, valve gap, the logical valve that valve pocket constitutes is in a side of piston, and be anchored on the piston rod, piston has the axial passage of being linked up by separated two oil pockets of piston, piston is anchored on the piston rod with tapered sleeve and self-locking nut, in piston rod, have two internal channels that lead to logical valve control grease chamber respectively, be taken up in order of priority two of the feeding logical valve to control grease chambeies from the internal channel of piston rod high pressure oil, promote moving of valve pocket, just the axial passage of piston can be opened or blocked, the fluid of two oil pockets just can come and go through axial passage when axial passage is opened and flow the purpose that the fluid of two oil pockets of realization circulates in oil cylinder.

The invention has the beneficial effects as follows compact structure, reliable, simple, can avoid oily temperature rise, energy-conservation fuel-economizing, the oil cylinder stroke action is accelerated, and satisfies the requirement of highi degree of accuracy, high-speed injection machine quick lock mould.

Description of drawings

The invention will be further described below in conjunction with drawings and Examples:

Fig. 1 is a structural representation of the present invention.

Fig. 2 is the working principle schematic representation that the present invention is used as the injection moulding machine mode-locking oil cylinder.

Among the figure: 1 nut, 2 valve gaps, 3 valve seats, 4 pistons, 5 tapered sleeves, 6 self-locking nuts, 7 piston rods, 8 oil cylinders, 9 oil pockets, 10 high-pressure oil passages, 11 connect the control grease chamber, 12 blocking-up control grease chambeies, 13 outer frustums, 14 interior conical rings, 15 axial passages, 16 high-pressure oil passages, 17 oil pockets, 18 pillow blocks, 19 valve pockets, 20 platens, 21 moulds, 22 moving pattern plates, 23 mould shifting devices, 24 rear supporting plates.

Embodiment

As shown in Figure 1, the present invention is by piston rod, oil cylinder, piston and logical valve are formed, piston 4 has axial passage 15, piston 4 usefulness tapered sleeves 5 and self-locking nut 6 are anchored on the piston rod 7, be separated into

oil pocket

9 and 7 two oil pockets of oil pocket by piston 4 in the oil cylinder 8, two oil pockets can be linked up through axial passage 15, be installed on piston 4 one sides and be anchored on logical valve on the piston rod 7 by valve gap 2, valve seat 3, valve pocket 19 constitutes, valve seat 3 binding thread connection piston rods 7, and with piston 4 location, nut 1 locking, valve gap 2 and valve pocket 19 be fastening connect and with valve seat 3 movingly with the control oil pocket that constitutes logical valve, the pillow block 18 that this control oil pocket is provided with by valve seat 3 is separated out two control grease chambeies, promptly connects control grease chamber 11 and blocking-up control grease chamber 12, and the other end is provided with outer frustum 13 to valve pocket 19 1 ends with 2 fastening connections of valve gap; Conical ring 14 was corresponding with the outer frustum 13 of valve pocket 19 in axial passage 15 1 ends of piston 4 had, and the big end of internal taper hole that piston 4 cooperates with tapered sleeve 5 is provided with the 6 fastening connections of screw-internal thread fit self-locking nut, and tapered sleeve 5 is to wait shape half cone ring to constitute by two; Having two

internal channels

10,16 in the piston rod 7 communicates with the control grease chamber 11,12 of logical valve respectively, when entering control grease chamber 12,11 driving valve pockets 19 respectively through piston rod 7

internal channels

16,10, moves on a small quantity high pressure oil, the outer frustum 13 of valve pocket 19 touches with the interior conical ring of piston 4 and closes or leave, the axial passage 15 of piston 4 will be blocked or open to valve pocket 19, and blocking-up or connection oil pocket 17 circulate in flowing with the fluid of oil pocket 9 is round.

Narrate the present invention 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 8 is installed in moving pattern plate 22 1 sides, the mould shifting device 23 that is installed in rear supporting plate 24 moves to right matched moulds until mould 21 joints (as Fig. 2 state) with moving pattern plate 22, high pressure oil entered blocking-up control grease chamber 12 from the passage 16 of piston rod 7 and promoted valve pockets 19 and move to right on a small quantity this moment, the interior conical ring 14 of the outer frustum 13 of valve pocket 19 and piston 4 touches to close and closes at this moment, the axial passage 15 of blocking piston 4, ending oil pocket 9 flows with the fluid of oil pocket 17 is round, high pressure oil enters oil pocket 17 realization locked modes through the oilhole of valve pocket 19 simultaneously, until finishing injection moulding.High pressure oil stops input, another path 10 that high pressure oil diverted via piston rod 7 enters logical valve connection control grease chamber 11, promotion valve pocket 19 resets and moves to left, the outer frustum 13 of valve pocket 19 separates with the interior conical ring 14 of piston 4, open the axial passage 15 of piston 4, oil pocket 17 can circulate in axial passage 15 round flowing with the fluid of oil pocket 9, and mould shifting device 23 pulling templates 22 move to left simultaneously, divided mould 21 so repeats to implement the locking and the unlatching of injection machine mould until finishing die sinking.

Fig. 1 is a Figure of abstract of the present invention.

Claims

1. the interior circulating oil cylinder of a logic built valve, by piston rod, oil cylinder, piston and logical valve are formed, it is characterized in that in oil cylinder (8), installing one by valve seat (3), valve gap (2), the logical valve that valve pocket (19) constitutes is in piston (4) one sides and be anchored on the piston rod (7), the piston (4) that has axial passage (15) is anchored on the piston rod (7) with tapered sleeve (5) and self-locking nut (6), have in the piston rod (7) and logical valve control grease chamber (12,11) internal channel (16 that communicates, 10), high pressure oil is through passage (16,10) feed the control grease chamber (12 of logical valve respectively, 11), can control and be separated into two oil pockets (9 by piston (4) in the oil cylinder (8), 19) fluid is blocked or is communicated round mobile through axial passage (15).

2. the interior circulating oil cylinder of logic built valve according to claim 1, it is characterized in that described valve seat (3) is that binding thread is connected on the piston rod (7), and locate with piston (4), nut (1) locking, valve gap (2) and valve pocket (19) be fastening connect and with valve seat (3) movingly with the control oil pocket that constitutes logical valve, the pillow block (18) that this control oil pocket is provided with by valve seat (3) is separated into two control grease chambeies (11,12), and the other end is provided with outer frustum (13) to valve pocket (19) one ends with valve gap (2) the fastening connection.

3. the interior circulating oil cylinder of logic built valve according to claim 1 and 2, it is corresponding with the outer frustum (13) of valve pocket (19) that axial passage (15) one ends that it is characterized in that piston (4) have an interior conical ring (14), and the big end of internal taper hole that piston (4) cooperates with tapered sleeve (5) is provided with the fastening connection of screw-internal thread fit self-locking nut (6).

4. according to the interior circulating oil cylinder of claim 1 or 2 or 3 described logic built valves, it is characterized in that tapered sleeve (5) is to wait shape half cone ring to constitute by two.