CN2343292Y - Door closer - Google Patents

Abstract

The utility model provides a door closing device, mainly comprising a cylinder, a piston, a piston rod, a spring and connecting pieces which are connected with a door body and a door frame. The inner cavity of the cylinder is divided into a front cavity and a back cavity by the piston, the spring is installed on the back cavity, and the piston is provided with a throttling through hole used for connecting the front cavity and the back cavity and a one way valve device used for conducting at the time of liquids flows from the front cavity to the back cavity causing shutting and reversing. The utility model has the advantages of simple structure and low cost.

Description

Door closer

The utility model relates to a kind of device of body knocking door case of avoiding.

Existing door closer mainly uses in some luxurious hotels, and complex structure, cost height are difficult to be accepted by common family.

The purpose of this utility model is that raising is a kind of simple in structure, the door closer that cost is low, result of use is good.

To achieve these goals, technical solution of the present utility model is such: door closer mainly comprises cylinder barrel, piston, piston rod, spring and the connector that is connected with doorframe with the door body, inner cavity of cylinder is separated into ante-chamber and back cavity two parts by piston, spring is installed in back cavity, and piston is provided with the throttling through hole that connects ante-chamber and back cavity and closes when ante-chamber flows to back cavity and the check valve apparatus of conducting when reverse when liquid.

Because in the above-mentioned technical solution, door closer is mainly by cylinder barrel, piston, piston rod, spring and relevant connector constitute, cylinder barrel is connected with doorframe, piston rod is connected with the door body, the Shi Menti that opens the door passes through connector, piston rod promotes piston and slides to back cavity, because at this moment the check valve apparatus on the piston is in conducting state, mainly control the speed of opening the door by the elastic force of the spring in the back cavity, the door body in like manner makes the piston forward chamber slide at closing time, because at this moment the check valve apparatus on the piston is in closed condition, the speed of closing the door is by the flow velocity control by the liquid of throttling through hole on the piston, because the throttling via design gets thinner, the speed of closing the door is with more stablely controlled, when the door body is in half-open semi-closure state and is provided with under the situation of external force effect, the elastic force of compression spring will promote the slip of piston forward chamber shuts a body, at this moment the check valve apparatus on the piston is closed, and the speed that piston slides is that the speed of closing the door of door body is because throttling through hole restriction is very stable all the time.In sum, door closer that technical solutions of the utility model provided when having simple in structure, low characteristics of cost, also have the characteristics that speed is more stable, result of use is good of opening the door, close the door.

Below in conjunction with drawings and Examples the utility model is described in further detail:

Structural representation when Fig. 1 is in user mode for door closer.

Fig. 2 is the structure enlarged diagram of circled positions among Fig. 1.

Fig. 3 is the linkage sketch corresponding to Fig. 1.

Wherein: 1. bearing pin; 2. doorframe bearing; 3. bonnet; 4. sliding sleeve; 5. spring; 6. cylindrical shell; 7 piston rods; 8. piston steady pin; 9. piston; 10. protecgulum; 11. clamp nut; 12. connector; 13. door body bearing; 14. bearing pin; 15. door body; 16. doorframe; 17. throttling through hole; 18. sealing ring; 19. porous; 20. sealing ring mounting groove; 21. stationary links; 22. dynamic link; 23. shrinking connecting-rod; 24. rotating fulcrum.

As shown in the figure, doorframe bearing 2 is fixed on the doorframe 16, doorframe bearing 2 flexibly connects by the bonnet 3 of bearing pin 1 and cylinder barrel, bonnet 3, cylindrical shell 6, protecgulum 10 constitutes cylinder barrel, piston 9 is installed in inner cavity of cylinder and inner cavity of cylinder is separated into ante-chamber and back cavity two parts, the a part of inner chamber of between piston 9 and the bonnet 3 that constitutes back cavity, the a part of inner chamber of between piston 9 and the protecgulum 10 that constitutes ante-chamber, spring 5 is located at interior its two ends of back cavity and is pasting bonnet 3 and piston 9, bonnet 3 is provided with sliding sleeve 4 in the back cavity, piston rod 7 is connected with piston 9 by piston steady pin 8, one end of piston rod 7 slides in sliding sleeve 4, the other end pass protecgulum 10 and and clamp nut 11 and connector 12 connections, connector 12 flexibly connects by bearing pin 14 and door body bearing 13, door body bearing 13 is fixed on the body 15, piston 9 be provided with one with the parallel pore of piston 9 axis directions, the external cylindrical surface of piston 9 is provided with sealing ring mounting groove 20, sealing ring 18 is installed in the groove, piston 9 is near the external cylindrical surface and the inner wall of cylinder matched in clearance of bonnet 3, be provided with porous 19 between the sealing ring mounting groove 20 of piston 9 and the ante-chamber, the inside wall of this piston 9 and sealing ring 18 and cylinder barrel constitutes the check valve apparatus of piston 9 jointly.In the process of pushing, piston rod 7 promotes piston 9 and slides to back cavity, and at this moment sealing ring 18 can be in a side of the close ante-chamber of sealing ring mounting groove 20, so the oil circuit conducting, elastic force effect meeting by spring 5 makes the balance that pushes, and also reaches the energy storage effect of spring 5 when pushing.In the process of closing the door, sealing ring 18 can be in a side of the close back cavity of sealing ring mounting groove 20, so oil circuit closes, and steadily closing the door of door body 15 realized by the throttle grverning of throttling through hole 17.When door body 15 is in about 90 ° of openings, the run-on point of door body 15 can and the axis of cylinder barrel, piston rod 7 be located along the same line, the rotating torque that the elastic force of spring 5 produces on door body 15 is zero, so at this moment a body 15 can be stablized this state that is positioned at.Thereby the pressurized degree of the adjustable in length spring 5 of regulating piston bar 7 in the installing hole of connector 12 can be selected to close the door, the proper speed and the degree of exerting oneself when opening the door.

Among foregoing the utility model embodiment; change into other structure when the throttling through hole 17 of piston 9; no matter be elongated hole or thin-walled hole; as long as having the throttle grverning function, it can realize that all the purpose of this utility model also all belongs in the claim protection domain of the present utility model; check valve apparatus on piston 9 adopts other structure that is different from check valve apparatus noted earlier; as long as it has liquid is closed and the characteristics of conducting oppositely the time when ante-chamber flows to back cavity, the embodiment that it constituted still belongs in the claim scope of the present utility model and can realize the purpose of this utility model.

Foregoing embodiment can be simplified to the linkage that has cylinder barrel and piston and piston rod as shown in Figure 3, wherein stationary links 21 is corresponding to doorframe bearing 2, dynamic link 22 is corresponding to door body 15 and door body bearing 13, shrinking connecting-rod 23 is corresponding to cylinder barrel and piston 9 and piston rod 7, rotating fulcrum 24 is corresponding to the run-on point of door body 15 around doorframe 16, when dynamic link 22 by shown position when stationary links 21 directions are rotated, spring 5 pressurized energy storage wherein, if at this moment stop the external force effect, the rotating torque that the elastic force of spring 5 produces on dynamic link 22 will make door slowly shut, when stationary links 21 turns to when making shrinking connecting-rod 23 and rotating fulcrum 24 be in same straight line, the rotating torque that the elastic force of spring 5 produces on dynamic link 22 is zero, but at this moment door is not subjected to external force effect stable position in this position.

Claims (3)

1, a kind of door closer, it is characterized in that: door closer mainly comprises cylinder barrel, piston (9), piston rod (7), spring (5) and the connector that is connected with doorframe (16) with door body (15), inner cavity of cylinder is separated into ante-chamber and back cavity two parts by piston (9), spring (5) is installed in back cavity, and piston (9) is provided with the throttling through hole (17) that connects ante-chamber and back cavity and closes when ante-chamber flows to back cavity and the check valve apparatus of conducting when reverse when liquid.

2, door closer according to claim 1, it is characterized in that: the throttling through hole (17) on the piston (9) be one with the parallel pore of piston (9) axis, the check valve apparatus on the piston (9) mainly is made of the sealing ring mounting groove (20) on sealing ring (18), piston (9) external cylindrical surface, porous (19) that piston (9) is provided with.

3, door closer according to claim 2, it is characterized in that: cylinder barrel is made up of protecgulum (10), cylindrical shell (6), bonnet (3), bonnet (3) is provided with sliding sleeve (4), and an end of piston rod (7) slides in sliding sleeve (4), the other end is equipped with clamp nut (11) and connector (12).

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