CN201095926Y

CN201095926Y - Door closer

Info

Publication number: CN201095926Y
Application number: CNU2007201253845U
Authority: CN
Inventors: 赖清镇
Original assignee: DONGGUAN DORINT DOOR CONTROL Co Ltd
Current assignee: DONGGUAN DORINT DOOR CONTROL Co Ltd
Priority date: 2007-08-29
Filing date: 2007-08-29
Publication date: 2008-08-06
Anticipated expiration: 2017-08-29

Abstract

The utility model discloses a door closer, which comprises a main body, a piston, a spring and a rotating shaft, wherein, one end of the piston is provided with an oil hole, and the other end is provided with a uni-directional oil valve; the piston is arranged in the main body; the rotating shaft is arranged in the piston and extends out of the main body; one end in the main body is also provided with an F hole and an adjusting valve. The F hole presents an F shape, and the front end of the F hole is communicated with the inner part of the piston; the middle end of the F hole is communicated with the inner part of the main body; the back end of the F hole is provided with the adjusting valve; and the tail end of the F hole is embedded with a falling stop ring which tightly contacts with the main body. The adjusting valve is tightly blocked at the back end of the F hole through the falling stop ring embedded at the tail end of the F hole. Even experiencing heaps of times of shakes caused by opening and closing the door, the adjusting valve still cannot drop out, thereby stopping the oil leakage phenomena due to dropping out of the adjusting valve.

Description

Door closer

Technical field

The utility model relates to a kind of door and window accessory field, refers to a kind of door closer especially.

Background technology

The meaning of door closer not only is door is closed automatically, can also protect doorframe and door body, the more important thing is that door closer has become a very important operating part of modern architecture intelligent management.

The the most frequently used a kind of of door closer is the fluid pressure type door closer, and its process of opening the door is by connecting rod rotation axis, and turning cylinder passes through the piston holddown spring, and by oilhole hydraulic oil is extruded onto a side, and door is opened; The process of closing the door is the release of the elastic potential energy put aside in opening process by spring, and door is closed.In the spring dispose procedure, because the sealing of unidirectional fuel tap, hydraulic oil forms the resistance that spring is discharged, and this resistance changes with the backflow of hydraulic oil along specific backflow oil circuit, makes a speed of closing controlled.

Wherein, the quality problems of fluid pressure type door closer most critical i.e. whether leakage of oil, because its internal hydraulic pressure system that the fluid pressure type door closer relies on fully realizes the control to the process of closing the door, leakage of oil means the inefficacy of hydraulic system, so hydraulic system is the decision fluid pressure type door closer sole criterion in application life.The leakage of oil most important reason is to adjust valve owing to often change to rotate with door and get loose, and its sealing effectiveness is reduced and is directed at leakage of oil.

The utility model content

For addressing the above problem, the purpose of this utility model is to provide a kind of can stop oil leakage phenomenon generation, long-lived door closer.

For achieving the above object, technical solution adopted in the utility model is: a kind of door closer, comprise body, piston, spring and turning cylinder, described piston one end is provided with oilhole, the other end is provided with unidirectional fuel tap, described piston is located in the body, described turning cylinder is located in the piston and is extended described body exterior, its described intrinsic end also is provided with the F hole and adjusts valve, described F hole front end is communicated with described internal piston, described F hole middle-end is communicated with described body interior, described adjustment valve is installed in rear end, described F hole, described adjustment valve extends to F hole middle-end in the F hole, the terminal assembly in described F hole is provided with the falling stop ring, and described falling stop ring closely contacts with described body.

More excellent, also being provided with tooth bar in the described piston, described turning cylinder is provided with gear, and described tooth bar is meshed with described gear; Described falling stop ring outer surface is provided with strip friction line, and described F hole is the F shape.

The falling stop ring that is embedded by the F bore end will be adjusted valve and hinder shelves securely in the rear end in F hole, though experience many times since door open the vibrations that He Guansuo brings, adjust valve and still can not drop out, thereby stopped to drop out and produce oil leakage phenomenon because of adjusting valve.

Description of drawings

Fig. 1 is the schematic perspective view of the utility model embodiment;

Fig. 2 is the schematic bottom view of the utility model embodiment;

Fig. 3 is the sectional view of the utility model embodiment;

Sectional view when Fig. 4 is compressed for the utility model embodiment medi-spring;

Fig. 5 is the generalized section in F hole among the utility model embodiment;

Fig. 6 is used schematic diagram for the falling stop ring of the utility model embodiment with the adjustment valve;

Fig. 7 is the enlarged diagram at A place among Fig. 1.

The specific embodiment

As Fig. 1, shown in Figure 3, the utility model specifically discloses a kind of door closer, comprises body 1, piston 2, spring 3 and turning cylinder 4, and body 1 right-hand member 12 is an enclosed construction, and is one-body molded when casting, and body 1 left end 11 has capping 111 sealings.The diameter that piston 2 one ends are provided with oilhole 22, oilhole 22 is 1/10th of a piston 2, the other end is provided with unidirectional fuel tap 21, unidirectional fuel tap 21 is provided with a valve pearl 211, piston 2 is located at body 1 inside, turning cylinder 4 is located in the piston 2 and is extended body 1 outside, and turning cylinder 4 is fixed in 13 positions, middle part of body 1; Also be provided with tooth bar 23 in the piston 2, turning cylinder 4 is provided with gear 41, and tooth bar 23 is meshed with gear 41, and when piston 2 during at body 1 internal activity, by tooth bar 23 linked gears 41, gear 41 drives turning cylinders 4 rotations.

As Fig. 2, Fig. 3, shown in Figure 5, end in the body 1 also is provided with F hole 5 and adjusts valve 6, described F hole 5 is the F shape, and three ports are arranged, F hole 5 front ends 51 and piston 2 internal communication, F hole 5 middle-ends 52 and body 1 internal communication, valve 6 is adjusted in 5 rear ends, 53 installings of F hole, adjust valve 6 and in F hole 5, extend to F hole 5 middle-ends 52, end 54 assemblies in F hole 5 are provided with falling stop ring 7, and as shown in Figure 5, falling stop ring 7 external surfaces are provided with strip friction line, adjust valve 6 medium positions and also be provided with bulge loop 61, bulge loop 61 plays chucking and adjusts valve 6 prevent the effect that skids off from falling stop ring 7.As shown in Figure 6, falling stop ring 7 is embedded in the body by high-strength embedding press, and falling stop ring 7 fully closely contacts with body 1.

As shown in Figure 3, when spring 3 is in equilibrium state, hydraulic oil is in the position cavity at spring 3 places of body 1, when turning cylinder 4 dextrorotations, pass through gear 41 interlock tooth bars 23, the time this, tooth bar 23 is motion compresses spring 3 left, and the valve pearl 211 of unidirectional fuel tap 21 is opened, and hydraulic oil constantly flows at a high speed to piston 2 inside by oilhole 22 in compression process.

As Fig. 4, shown in Figure 2, owing to being compressed, spring 3 produces elastic potential energy, when spring 3 discharges elastic potential energy, the valve pearl 211 of unidirectional fuel tap 21 is closed, hydraulic oil can only be by F hole 5 lentamente to piston 2 inner inputs, until the elastic potential energy of spring 3 discharge fully finish till, and the hydraulic oil flow speed in F hole 5 is to adjust by adjusting valve 6 in this process.

Above-described only is preferred implementation of the present utility model; should be pointed out that for the person of ordinary skill of the art, under the prerequisite that does not break away from the utility model creation design; can also make some distortion and improvement, these all belong to protection domain of the present utility model.

Claims

1. door closer, comprise body (1), piston (2), spring (3) and turning cylinder (4), described piston (2) one ends are provided with oilhole (22), the other end is provided with unidirectional fuel tap (21), described piston (2) is located in the body (1), described turning cylinder (4) is located in the piston (2) and is extended described body (1) outside, it is characterized in that the end in the described body (1) also is provided with F hole (5) and adjusts valve (6), described F hole (5) front end and described piston (2) internal communication, described F hole (5) middle-end and described body (1) internal communication, described adjustment valve (6) is installed in rear end, described F hole (5), described adjustment valve (6) extends to the middle-end of F hole (5) in F hole (5), the terminal assembly in described F hole (5) is provided with falling stop ring (7), and described falling stop ring (7) closely contacts with described body (1).

2. door closer according to claim 1 is characterized in that also being provided with tooth bar (23) in the described piston (2), and described turning cylinder (4) is provided with gear (41), and described tooth bar (23) is meshed with described gear (41).

3. door closer according to claim 1 is characterized in that described falling stop ring (7) external surface is provided with strip friction line.

4. door closer according to claim 1 is characterized in that described F hole (5) is the F shape.