CN2148153Y

CN2148153Y - Automatic door closing device

Info

Publication number: CN2148153Y
Application number: CN92228037U
Authority: CN
Inventors: 留小然
Original assignee: XINGHUA GENERAL FACTORY QINGTIAN COUNTY
Current assignee: XINGHUA GENERAL FACTORY QINGTIAN COUNTY
Priority date: 1992-07-21
Filing date: 1992-07-21
Publication date: 1993-12-01
Anticipated expiration: 2002-07-21

Abstract

The utility model relates to an automatic door closer. A spring is utilized to store energy and push a piston in order to control oil return, and the process of closing a door is stable and reliable. When the angle of opening a door leaf is 85 DEG-100 DEG, the automatic door closer can keep the door leaf in open state stably. When the angle of opening the door leaf is 3 DEG, force can be increased gently, and the door leaf can be closed reliably without impact. The automatic door closer has reasonable and compact structure, reliability for opening and closing the door, convenient operation, no impact and no noise. Compared with similar products at home and abroad, the performance of the automatic door closer is enhanced.

Description

Automatic door closing device

The utility model relates to a kind of stable automatic door closer that opens and closes of door leaf that guarantees.

Damage door leaf and doorframe for preventing that bump from waiting, the assurance door leaf is stable to open and close, and people have developed automatic door closer, and the Swan automatic door closer of producing as Xi'an Aircraft Manufacturing Corporation is exactly an example.This door closer adopts fan tooth and two-sided interior tooth bar to nibble entirely, and bump and dead point are arranged during operation, and the requirement on machining accuracy of part is higher in addition; Adopt cylindrical spring, in the door closer running, pressure changes undesirable, and the vibration impact noise is big when closing; The Rocker arm assembly complex structure, member rocks instability, poor effect ...It is better that the utility model is exactly the performance of developing at above-mentioned deficiency, the new type auto door closer of more reasonable structure.

The purpose of this utility model is: utilize spring energy-storage, promote piston, by the damping force to oil return, control piston moves with the speed of setting up, and makes a process of closing steadily, reliably; Automatic door closer can make door leaf stably be held open state when 85 °～100 ° of door leaf opening angles; When opening angle is 3 °, reinforcement gently, make door leaf reliably, not have bump ground closed, thereby create a kind of rational in infrastructurely, compact, open and close is reliable, and is easy to use, do not have bump, noiseless new type auto door closer.

The utility model structural principle is provided by accompanying drawing:

Figure one is a structure principle chart;

Figure two is the run location schematic diagram, the state when a is closed, the state when b is unlatching;

Figure three is trade mark, label schematic diagram;

Figure four is the straight line line schematic diagram of rocking arm or pull bar contact surface;

Figure five is for transferring screw and triangular groove schematic diagram thereof.

Shown in figure one～five, wherein (1) is housing, (2) be installing hole, (3) be piston, (4) be rocking arm, (5) be crank axle, (6) be bearing, (7) be the crank axle bed, (8) be pull bar, (9) be end cap, (10) be the oil strain sheet, (11) be one way valve, (12) coat for nylon, (13) be droop adjustment screw, (14) be the oil return ditch, (15) be oil-recovery tank, (16) be spill port, (17) be connecting rod, (18) be oil cylinder, (19) be the taper stage clip, (20) be pressure oil, (21) be trade mark, (22), for regulating bolt, (23) be the pull bar holder, (24), be doorframe, (25) be door leaf, (26) be groove, (27) be label, (28) be straight burr, (29) be triangular groove.

Now with reference to the accompanying drawings in conjunction with the embodiments, operating principle of the present utility model is described below:

Pull bar holder (23) is fixed on the doorframe (24), housing (1) is fixed on the door leaf (25).When opening the door, because people's thrust increases the pull bar (8) and the angle of rocking arm (4) gradually, rocking arm (4) drives crank axle (5) and rotates, and crank axle (5) compresses taper stage clip (19) to the right by connecting rod (17) pulling piston (3).In the process that moves right, the pressure oil (20) in the oil cylinder (18) is by one way valve (11) at piston (3), and a left side that flows to piston (3) through oil strain sheet (10) is surveyed.When door leaf was opened into 85 °～100 °, piston (3) moved near the top dead-centre, and pressure oil this moment (20) can only pass through the right side of spill port (16) return piston (3).The pressure oil that returns (20) is subjected to the damping force that droop adjustment screw (13) is set up, and this damping force makes piston (3) relatively stable near top dead-centre, guarantees the state that door leaf (25) is in out.When door need be closed, the opening angle of door leaf (25) is less than 85 °, then piston (3) leaves metastable state, under the promotion of taper stage clip (19), piston (3) is moved to the left, can only pass through the right side of spill port (16) return piston (3) because of the pressure oil (20) in piston (3) left side, under the effect of damping force, piston (3) can only move to the left with the speed of setting up, connecting rod (17) then drives crank axle (5) and rotates reposefully, disturbs thereby drive door leaf (25) closes reposefully.When door leaf (25) to make position still has 3 ° of opening angles, oil return ditch (14) is communicated with oil-recovery tank (15) on the piston (3), the pressure oil (20) in piston (3) left side is by oil return ditch (14), oil-recovery tank (15) return piston (3) right side, damping force disappears, the pressure of taper stage clip (19) directly is passed to connecting rod (17), crank axle (5), rocking arm (4), pull bar (8), pull bar holder (23), and door leaf (25) cuts out reliably.

The utility model also has following features:

1, piston (3) adopts nylon to coat (12), has effectively improved sealing property, has prolonged service life.

2, adopt volute spring (19), improved automatic door closer stationarity in the course of the work effectively.

3, pull bar (8) adopts the flat bar structure with rocking arm (4), can be parallel superimposed during work, and the active length between pull bar (8) and the rocking arm (4) is adjustable arbitrarily by regulating bolt (22).For the secure fixation of active length, on the contact surface of pull bar (8) and the superimposed position of rocking arm (4), suppressed straight burr (28).

4, two end cap (9) adopts hexagonal socket head plug, and after installing, trade mark (21) is sticked in its outside, not only compactness but also attractive in appearance.

5, the upside of shell (1) is provided with some installing holes (2), and the center line of installing hole (2) at grade.Along fluted on the position of installing hole (2) (26), after shell (1) is installed on the door leaf (25), label (27) can be inserted groove (26) and cover installing hole (2).

6, have the triangular groove (29) of a proper angle on the droop adjustment screw (13), this structure can effectively be regulated oil return speed in a big way.

7, between crank axle (5) and the crank axle bed (7) bearing (6) is housed, reduces friction, guarantee reliable.

The utility model is rational in infrastructure, compact, and is reliable, easy to use, do not have bump, noiselessness, compares with present similar products at home and abroad, and performance improves greatly, has bigger popularizing value.

Claims

1, a kind ofly be used for controlling the automatic group door device that door leaf opens and closes, it is characterized in that this group device by housing (1), piston (3), shake wall (4), crank axle (5), pull bar (8) and formed, oil cylinder (18), end cap (9) are arranged on its middle shell (1); Oil strain sheet (10), one way valve (11) are arranged on the piston (3); Piston (3) coats (12) with nylon, and oil-recovery tank (15) is arranged on it; Piston (3) is connected with crank axle (5) by connecting rod (17), and taper stage clip (19) is arranged therebetween; Between crank axle (5) and the crank axle bed (7) bearing (6) is housed.

2, according to the described automatic door closer of claim 1, it is characterized in that the rocking arm (4) of this automatic door closer and pull bar (8) adopt the flat bar structure, both connect by regulating bolt (22), and connecing of superimposed position has straight burr (28) on the true face between the two.

3, according to the described automatic door closer of claim 1, it is characterized in that housing (1) upside of this automatic door closer has some installing holes (2), the center line of installing hole (2) is at grade; On housing (1) lateral surface vertical with installing hole (2) center line fluted (26), label (27) can insert groove (26).

4, according to claim 1 and 3 described automatic door closers, it is characterized in that on the inwall of the oil cylinder (18) on the housing (1) of this automatic door closer oil return ditch (14) being arranged, spill port (16) is arranged on the housing (1), spill port (16) is provided with droop adjustment screw (13), has the triangular groove (29) of a proper angle on the droop adjustment screw (13).

5, according to claim 1,3 described automatic door closers, it is characterized in that the end cap (9) on the housing (1) of this automatic door closer is a hexagonal socket head plug, after installing, the outside code (21) of end cap (9).