CN2489054Y

CN2489054Y - Pneumatic closer

Info

Publication number: CN2489054Y
Application number: CN 01244462
Authority: CN
Inventors: 吴广
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-06-21
Filing date: 2001-06-21
Publication date: 2002-05-01
Anticipated expiration: 2011-06-21

Abstract

The utility model relates to a pneumatic closer. A pneumatic mechanism consists of a cylinder cover, a plunger head and a plunger pole. The utility model is characterized in that: a longitudinal groove is arranged on inner side wall of a cylinder. The plunger head is provided with a central through hole whose front end is provided with inner thread. The plunger pole passing through the through hole is connected with the thread of the plunger head. Outer circumference of the plunger head is provided with an axial airflow channel whose rear part is provided with an end surface airproofed circle. The utility model has the function of two stage acceleration, so the utility model is capable of making users unhurriedly coming in and going out without being disturbed and ensuring the door be closed automatically.

Description

The vapour-pressure type door closer

The vapour-pressure type door closer since volume little, operate steadily, do not have special advantages such as leakage of oil and progressively replace the fluid pressure type door closer.But the problem that vapour-pressure type door closer of the prior art exists is, no matter door is open on any position, and its dynamics of opening the door and the speed of closing the door all are same.Therefore,, finish automatically and close door, have to door closer is arranged on certain closing velocity in order to guarantee to overcome the dead bolt resistance.If this speed is too fast, user's turnover is caused interference; If cross slowly, then can not finish and close door automatically.

The purpose of this utility model is to avoid above-mentioned weak point of the prior art, and a kind of vapour-pressure type door closer that secondary quickens function that has is provided.Can allow the user pass in and out calmly, interference-free: as to finish again and close door automatically.

The purpose of this utility model is achieved through the following technical solutions:

The utility model constitutes air pressure mechanism by cylinder jacket, piston head and with the hinged piston rod of rocking arm.

Design feature of the present utility model is:

A, on the inside wall of described cylinder jacket afterbody, offer one section longitudinal fluting;

B, described piston head have center through hole, and the through hole leading portion is an internal thread, and piston rod runs through this through hole, and is threaded with piston head, are provided with the axial flow passage in the periphery of piston head, at the afterbody of described gas channel end-face seal ring are set.

Use the utility model when door is about to close, groove connects the cavity of piston head both sides, and closing an air pressure increases suddenly, forms secondary and quickens.Compared with the prior art, the utility model is slowly closed the door when big aperture, does not influence user's normal turnover.When the little aperture that is about to close, quicken to finish closing automatically of door simultaneously.It is simple and reliable for structure, volume is little, the feel that operates steadily, pushes is light.

Accompanying drawing is the utility model structural representation.

By the following examples, in conjunction with the accompanying drawings the utility model is further described.

Embodiment:

Referring to accompanying drawing, present embodiment constitutes air pressure mechanism by cylinder jacket 1, piston head 2 and with the hinged piston rod 3 of rocking arm.In the airtight cylinder of this built-in piston, charged into high-pressure inert gas, utilize the effect of gases at high pressure, piston is formed move back and forth, again by parts such as rocking arms to piston, the reciprocating motion of piston is transformed into rotatablely moves, thereby reach the effect of closing automatically after door is unlocked.

Shown in the figure, in the present embodiment, on the inside wall of cylinder jacket 1 afterbody, offer one section longitudinal fluting 4.Longitudinal fluting 4 is along the circumference uniform distribution of cylinder jacket 1.Be provided with three roads altogether.Groove 4 evenly is set guarantees piston head 2 traveling comforts.

Piston head 2 has center through hole 5, and through hole 5 leading portions are internal thread, and piston rod 3 runs through this through hole 5, and is threaded with piston head 2, is provided with axial flow passage 6 in the periphery of piston head 2, at the afterbody of gas channel 6 end-face seal ring 7 is set.

As shown in the figure, in the present embodiment, the afterbody of piston head center through hole 5 is set to taper, piston rod 3 and its matched in clearance of respective shapes.This gap forms the overflow pore.Adjust the relative axial position between piston rod 3 and the piston head 2 as required, can change the size of this overflow pore, thereby change a speed of closing.

It is as follows to cross the process of work:

Open the door, when promoting door leaf, the rotation driving member of rocking arm drives piston rod 3 and moves right, cylinder right side gas is compressed, end-face seal ring 7 is owing to sealing surface is left in the effect that is subjected to air pressure, and gas channel 6 is opened, and gas flows to the left side air chamber along passage 6.

When door stopped to open, piston head 2 was owing to be subjected to the pressure of cylinder right side air chamber, then was moved to the left.At this moment, sealing ring 7 is because the effect sealing gas channel 6 of air pressure and spring 8.Force gas overflow pore place between piston rod 3 and piston head 2 of backflow to flow to the right side air chamber, and piston is slowly resetted.

When door was pushed to the position that is about to close, piston head 3 moved to groove 4 places, and groove 4 connects the and arranged on left and right sides cavity, throughput moment increase, and closing a speed increases suddenly, forms secondary and quickens, and utilizes inertia to overcome the dead bolt resistance, reaches the effect of closing door.

Claims

1, vapour-pressure type door closer constitutes air pressure mechanism by cylinder jacket (1), piston head (2) and the piston rod (3) hinged with rocking arm, it is characterized in that:

A, on the inside wall of described cylinder jacket (1) afterbody, offer one section longitudinal fluting (4);

B, described piston head (2) have center through hole (5), through hole (5) leading portion is an internal thread, piston rod (3) runs through this through hole (5), and be threaded with piston head (2), periphery at piston head (2) is provided with axial flow passage (6), at the afterbody of described gas channel (6) end-face seal ring (7) is set.

2, vapour-pressure type door closer according to claim 1, the afterbody that it is characterized in that described piston head center through hole (5) is taper, the piston rod of respective shapes (3) and its matched in clearance.

3, vapour-pressure type door closer according to claim 1 is characterized in that described longitudinal fluting (4) is along cylinder jacket (1) circumference uniform distribution.