CN2032641U - Hydraulic cushioning door closing device - Google Patents

Abstract

The utility model relates to a hydraulic cushioning door closing device, which can automatically shut the door lightly, and lock the door or buckle the door handle at the moment of closing the door. The hydraulic cushioning door closing device comprises a unidirectional throttling piston component and a hydraulic cylinder with changeable diameter. When the door is closed, the piston component runs in the hydraulic cylinder. The multi speed change in the door closing process is realized through the throttling travel and the non throttling travel, quick-slow-relatively quick. The utility model has simple structure, cheap cost of manufacture, wide practical use, and slow closing door operation.

Description

Hydraulic cushioning door closing device

The utility model relates to makes wing move on to the device of unlatching or fastening position, especially relates to the derailing switch that has braking device.

As a kind of fluid pressure type automatic door closer Chinese patent 86205423 existing introductions, only do simple declaration here.When door turns round, the formation that relies on inner sleeve and outer tube to form, promptly outer tube can freely slide along the sealing of inner sleeve outer wall, and meanwhile, described sleeve component can form with bearing first and bearing second respectively and be articulated and connected.When door is open, along with outer tube slides along the inner sleeve outer wall, described spring is compressed, the annular piston black box also is compressed the direction sealing towards spring and slides, the hydraulic oil that is provided with in the inner sleeve in the chamber, spring one side is flowed towards the intermediate cavity that forms between blind flange and the annular piston seal by damping hole on the piston seal seat, and the intraluminal hydraulic oil of overcoat also flows towards described intermediate cavity by the damping hole on the blind flange simultaneously.In case eliminate the active force that pushes, under the resilient force of described spring, impel and close naturally, since this close the door process in, the hydraulic oil that is positioned at described intermediate cavity is compressed, and it is mobile towards the chamber of its right and left respectively by the damping hole of this chamber the right and left, make the release of the elastic energy of spring be subjected to further obstruction, thereby make the action of closing the door obtain buffering, and the action of closing the door can be finished smoothly.This is that a kind of speed of closing is suitably adjustable, action is gentle when closing, closing the fluid pressure type door closer that a moment does not produce impact sound, but this door closer does not have automatic locking (button) door function, do not have fixing cushion stroke, fast more when the speed of opening the door, then its cushion stroke is short more, and its structure is complicated, and manufacturing cost is higher.

The purpose of this utility model is to reach fast by the earial drainage effect of one-way throttle piston element when opening the door to open the door; Shift out vacuum that cylinder body causes by piston rod and make when beginning to close and have fast speeds, to shorten whole closing a time; Reach slow quick-closing door by the throttling action of one-way throttle piston element when closing; The hydraulic cylinder that changes by cylinder diameter makes and closes a speed and accelerate when goalkeeper will close, and utilizes the elastic force of its inertia force and compression spring door lock to be locked or door handle is buckled.

The utility model comprises a draw-bar seat and a hydraulic cylinder seat, this door closer has one-way throttle piston element, piston rod, compression spring and hydraulic cylinder, wherein the one-way throttle piston element is made up of piston and one-way throttle element mounted thereto, piston rod is fixedlyed connected with the one-way throttle piston element and is contained in the hydraulic cylinder, on the piston rod of compression spring housing in hydraulic cylinder, seal with potted component between hydraulic cylinder end and the piston rod.When opening the door, the hydraulic cylinder inner spring is compressed, after letting go, under the spring force effect, piston moves in hydraulic cylinder, through throttling stroke and non-throttling stroke, realize that many speed of the process of closing the door change: (door is in 90 °～75 ° approximately) (door is in 75 °～30 ° approximately) faster (door is in 30 °～0 ° approximately) at a slow speed fast.Fast and faster stroke can shorten whole closing a time, stroke can prevent to collide with door immediately following second people who enters at a slow speed, needn't live door with stick shift when going out, the inertia force that utilizes stroke faster to produce adds that spring force can lock door lock or door handle be buckled gently.From 75 °～0 ° stroke all is to cushion the process of closing the door.

The utility model has the advantages that because moving parts is in the oil substantially, can corrosion, it is also little to wear and tear, so reliable operation; Again because the Incoercibility and the throttling performance of liquid oils are all good than gas, so mechanism operates steadily; It is gentle to close action, does not produce impact sound closing a moment; Whole door closer is simple in structure, and requirement on machining accuracy is not high, and low cost is applied widely, and these all make it be convenient to promote the use of; And this door closer can close the door moment lock door lock or door handle is buckled, this is its distinctive feature especially.

To narrate below and press the most preferred embodiment that the utility model is made hydraulic cushion formula door closer, therefrom the more advantage of the utility model as can be seen.The accompanying drawing of consulting in the narration has following nine width of cloth:

Fig. 1 is the positive view of the utility model most preferred embodiment after installing, and wherein Fig. 1 a is a first half, and Fig. 1 b is a latter half;

Fig. 2 is the vertical view of Fig. 1, and wherein Fig. 2 a is a first half, and Fig. 2 b is a latter half;

Fig. 3 is the positive view of piston in the utility model most preferred embodiment;

Fig. 4 is the A-A sectional view of Fig. 3;

Fig. 5 is the positive view of piston slip cap in the utility model most preferred embodiment;

Fig. 6 is the left view of Fig. 5;

Fig. 7 is that the K of Fig. 6 is to partial view;

Fig. 8 is the positive view of another embodiment piston of the utility model;

Fig. 9 is the positive view of another embodiment piston slip cap of the utility model.

Figure 10 is the positive view of the another embodiment one-way throttle of the utility model piston element.

Now referring to Fig. 1 a, Fig. 1 b and Fig. 2 a, Fig. 2 b, the draw-bar seat of door closer ［ 1 ］ is installed on the door ［ 20 ］, oil cylinder seat ［ 18 ］ is installed on the doorframe ［ 19 ］, oil cylinder is installed between draw-bar seat ［ 1 ］ and the oil cylinder seat ［ 18 ］, one end of piston rod ［ 4 ］ is hinged by piston rod bulb ［ 2 ］ and draw-bar seat ［ 1 ］, the other end of piston rod ［ 4 ］ links to each other with piston ［ 12 ］ by screw thread, on piston rod ［ 4 ］, be with compression spring ［ 11 ］, compression spring ［ 11 ］ and piston ［ 12 ］ are contained in the cylinder tube ［ 10 ］, use oil cylinder cover ［ 5 ］ respectively at the two ends of cylinder tube ［ 10 ］, ［ 17 ］ seal, between them, use an O-ring seals ［ 8 ］ to be sealed respectively, an end that stretches out oil cylinder cover ［ 5 ］ at piston rod is sealed with y-type seal ring ［ 6 ］, and place restrictions on compression spring ［ 11 ］ with back-up ring ［ 7 ］ and block ［ 9 ］ and move to this end, be with piston slip cap ［ 13 ］ at the middle part of piston ［ 12 ］, be embedded with O-ring seals ［ 8 ］ in the groove of piston slip cap ［ 13 ］, and elastic spring ［ 14 ］ is housed at the right-hand member of piston ［ 12 ］, to prevent that piston slip cap ［ 13 ］ from sliding from piston ［ 12 ］, oil cylinder cover ［ 17 ］ is hinged on the oil cylinder seat ［ 18 ］.

Now referring to Fig. 3 and Fig. 4, piston ［ 12 ］ is made stairstepping, and the one end has screwed hole ［ 22 ］, and piston rod ［ 4 ］ is screwed into this screwed hole ［ 22 ］ and links to each other with piston ［ 12 ］; Middle part at piston ［ 12 ］ evenly has 8 discharge orifices ［ 21 ］ along circumference, is shaped on half slot ［ 23 ］ at the other end of piston ［ 12 ］, and elastic spring ［ 14 ］ places this groove ［ 23 ］.

Now referring to Fig. 5, Fig. 6 and Fig. 7, on an end face of piston slip cap ［ 13 ］, be shaped on two half slots ［ 24 ］, form throttling action with 8 discharge orifices ［ 21 ］ on the piston ［ 12 ］, have a groove ［ 25 ］ at piston slip cap ［ 13 ］ middle part, O-ring seals ［ 8 ］ is installed in wherein.

The other mode of restricting element can be formed by above-mentioned piston ［ 12 ］ with piston slip cap ［ 13 ］ combination and also throttling action can be realized.

Now referring to Fig. 8 and Fig. 9, the difference of piston is to have opened the aperture ［ 26 ］ of an inclination in middle of piston among this piston and Fig. 3, and the difference of piston slip cap among Fig. 9 and the piston slip cap among Fig. 5 is to have lacked two half slots, the restricting element of Zu Chenging has throttling action equally like this, and aperture ［ 26 ］ promptly is a throttle orifice.

Certainly, without the piston slip cap,, equally also can reach the purpose of throttling one-way throttle valve directly being installed on the piston to replace radial hole on the piston.

Now referring to figure ［ 10 ］, in piston ［ 12 ］ inside, one one way valve spool ［ 27 ］ is housed, spool ［ 27 ］ one ends into a cone shape, and offer a throttle orifice ［ 32 ］ at this cone circle centre position, the spool other end is offered a hole, its inner compression little spring ［ 28 ］ of installing, compression little spring ［ 28 ］ one ends withstand on the spool ［ 27 ］, the other end withstands on screw thread and is fixedly mounted on the screw stifled ［ 29 ］ of piston ［ 12 ］ one ends, screw has an oilhole ［ 30 ］ on stifled ［ 29 ］, its length direction is provided with fuel feed hole ［ 33 ］ successively in piston ［ 12 ］ circumference upper edge, O-ring seals ［ 8 ］ and oil outlet ［ 31 ］, described fuel feed hole ［ 33 ］ is near piston rod ［ 4 ］ one ends.

Now whole shutter door process is described with embodiment of the present utility model.

In the door opening process, door pulling piston rod ［ 4 ］ stretches out cylinder tube ［ 10 ］ gradually, compression spring ［ 11 ］ is having under the situation of precompression, further compression, piston slip cap ［ 13 ］ is under the resistance and self static action of inertia of frictional force, oil simultaneously, relative piston ［ 12 ］ some distances that moves right, 8 discharge orifices ［ 21 ］ on the piston ［ 12 ］ have been opened, perhaps oil is opened one way valve spool ［ 27 ］ by fuel feed hole ［ 33 ］, oil flows to oil outlet ［ 31 ］, the oil turnover on piston ［ 12 ］ both sides is unimpeded, so can reach the purpose of opening the door fast.When opening the door, piston rod ［ 4 ］ stretches out cylinder tube ［ 10 ］, makes the vacuum that has produced certain volume in the former oil-overflow cylinder tube ［ 10 ］.

In closing a process automatically, three kinds of different closing velocities are arranged.When reaching 90 °, door decontrols (too) later on less than 90 °, under the effect of spring force, door closes 75 ° with fast speed from 90 °, this is to eliminate the rapid movement that above-mentioned vacuum produces, piston slip cap ［ 13 ］ is because frictional force simultaneously, self static inertia, move on to the middle part from piston ［ 12 ］ right-hand member, discharge orifice ［ 21 ］ on the piston ［ 12 ］ is covered, perhaps one way valve spool ［ 27 ］ is closed under the effect of compression little spring ［ 28 ］, form throttle, so when door is closed to 75 °, eliminated after the vacuum in the cylinder tube ［ 10 ］, door just changes the slow running stage over to.

After piston slip cap ［ 13 ］ covers 8 discharge orifices ［ 21 ］ on the piston ［ 12 ］, oil can only flow through from the gap between piston slip cap ［ 13 ］ and the piston ［ 12 ］, have through piston slip cap ［ 13 ］ chamfering end face two half slots ［ 24 ］ or flow through through throttling pore ［ 26 ］, the oil that perhaps enters fuel feed hole ［ 33 ］ flows to oilhole ［ 30 ］ from throttle orifice ［ 32 ］ and has produced throttling action, therefore the speed of service of this section door is slower, design was controlled at for 2～3 seconds, and this section stroke is called " throttling stroke ".So just avoided also can making the people who gos out to block door with hand push immediately following second people who enters and the possibility that door joins.

When door runs to an aperture and is about 30 ° of positions, make the sealing ring ［ 8 ］ on the piston slip cap ［ 13 ］ just in time move to cylinder tube ［ 10 ］ enlarged-diameter part in the design, oil passes through from the gap of sealing ring ［ 8 ］ and cylinder tube ［ 10 ］ enlarged-diameter, throttling action disappears, compression spring ［ 11 ］ promotes door and reaches home with fast speeds, and this section stroke is called " non-throttling stroke ".Borrow the inertia force of faster operation of door and the elastic force of compression spring ［ 11 ］ just door lock to be locked or door handle is buckled, thereby finished the whole buffering process of closing the door.

Hydraulic cushion formula door closer is applicable to the door that all timber structure one-ways are opened, and could be suitable for if iron gate then needs to reequip.As long as oil cylinder seat and draw-bar seat size as requested are loaded on behind the door the doorframe and door with wood screw respectively, again hydraulic cylinder assembly is put, the nut of twisting on the good oil cylinder seat gets final product.

Claims (5)

1, a kind of hydraulic cushion formula door closer, it comprises a draw-bar seat and a hydraulic cylinder seat.It is characterized in that this door closer has one-way throttle piston element, piston rod, compression spring and hydraulic cylinder, described one-way throttle piston element is made up of piston and one-way throttle element mounted thereto.Piston rod is fixedlyed connected with the one-way throttle piston element and in hydraulic cylinder, on the piston rod of compression spring housing in hydraulic cylinder, is sealed with potted component between hydraulic cylinder end and the piston rod.

According to the described door closer of claim 1, it is characterized in that 2, the cylinder diameter of described hydraulic cylinder ［ 10 ］ changes, it is less that piston ［ 4 ］ one end cylinder diameters are housed, and it is bigger that piston ［ 12 ］ one end cylinder diameters are housed, and it is gradual change that there is one section cylinder diameter the centre.

3, according to claim 1 or 2 described door closers, it is characterized in that, described one-way throttle element is made up of the discharge orifice ［ 21 ］ on piston slip cap ［ 13 ］ and the piston ［ 12 ］, has one with upper half-round slot ［ 24 ］ on piston slip cap ［ 13 ］ one end faces.

According to claim 1 or 2 described door closers, it is characterized in that 4, described one-way throttle element is made up of the discharge orifice ［ 21 ］ on piston slip cap ［ 13 ］ and the piston ［ 12 ］, have an above throttle orifice ［ 24 ］ at piston ［ 12 ］ middle part.

According to claim 1 or 2 described door closers, it is characterized in that 5, described one-way throttle element is made of the one-way cock that is installed on piston ［ 12 ］ right-hand member.Described one-way cock has an above fuel feed hole ［ 33 ］, one way valve spool ［ 27 ］ and open the throttle orifice of an end ［ 32 ］ thereon, compression little spring ［ 28 ］, screw stifled ［ 29 ］ and open thereon oilhole ［ 30 ］, an above oil outlet ［ 31 ］.Described one way valve spool ［ 27 ］ is installed in piston ［ 12 ］ inside.Screw stifled ［ 29 ］ is fixedly mounted on piston ［ 12 ］ other end, between spool ［ 27 ］ and screw stifled ［ 29 ］, settle compression little spring ［ 28 ］, fuel feed hole ［ 33 ］ is opened on the piston ［ 12 ］ of nearly plug cock bar ［ 4 ］ one ends, and oil outlet ［ 31 ］ is opened on the piston ［ 12 ］ outside spool ［ 27 ］.

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