CN201103305Y

CN201103305Y - Door closer

Info

Publication number: CN201103305Y
Application number: CNU200720058648XU
Authority: CN
Inventors: 梁庆均
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-10-24
Filing date: 2007-10-24
Publication date: 2008-08-20
Anticipated expiration: 2017-10-24

Abstract

The utility model discloses a door closer belongs to the technical field that has the wing adjusting device of hydraulic piston floodgate. The door closer comprises a shell, wherein the shell is provided with a closed inner cavity, the inner cavity is filled with damping media, a piston capable of moving linearly is arranged in the inner cavity, the piston hermetically divides the inner cavity into two chambers, meshing teeth distributed along the moving direction of the piston are arranged on the piston, a closer shaft is arranged on the shell in a rotating and penetrating mode, a gear meshed with the meshing teeth is arranged on the closer shaft, a closing spring is arranged between one end of the inner cavity and one end of the piston of the shell in a propping mode, a central oil core rod penetrating through the sealing surface of the piston is fixedly arranged in the inner cavity of the shell, an overflow hole communicating the two chambers of the inner cavity is formed in the central oil core rod, an overpressure through hole is formed in the sealing surface of the piston, a top bead is arranged on one side of the overpressure. The utility model discloses can eliminate opening and the excessive pressure that the closed door leaf produced, prevent the excessive pressure and cause the damage of door closer.

Description

Door closer

Technical field

The utility model belongs to the technical field of the wing adjusting device that has liquid piston brake, specifically is meant a kind of door closer of closed door leaf.

Background technology

Traditional door closer that is used for closed door leaf in the market, has a housing, the piston that can guide movably at the housing cathetus, the closer axle of a rotatably support in housing, a closer spring that is bearing on the housing and piston is loaded, and hydraulic damping device, wherein, the enclosure interior space is full of resisting medium, and the enclosure interior space is divided at least two housing inner rooms hermetically by described piston fluid, wherein, described piston can be operated by the rotation of closer axle, and the closer spring is compressed, wherein, an overflow valve is set in described piston, is used for through-flow resisting medium when opening door leaf.In the closing course of door leaf, door leaf may be moved along closing direction as the movement velocity that door leaf is scheduled to than damping device itself quickly by " overvoltage ".In this case, to having produced bigger overvoltage by the micro-resisting medium that compresses, can be able to cause the connecting rod of the piston/cylinder device or the power of transmission to damage in this case in the housing inner room that when closure, diminishes.

The utility model content

The purpose of this utility model is to provide a kind of door closer that can prevent overvoltage and cause internal construction to damage.

For solving the problems of the technologies described above, the technical solution adopted in the utility model is: door closer, comprise housing, housing has the inner chamber of a sealing, be full of resisting medium in the inner chamber, but be provided with the piston that straight line moves in the inner chamber, piston with bore seal be divided into two chambers, piston is provided with the engaging tooth of arranging along its moving direction, rotate on the housing and be equipped with the closer axle, the closer axle is provided with and the engaging tooth meshed gears, and housing top between end of inner chamber and piston one end is provided with closing spring, is fixed with the central wick bar that passes the piston seal face in the inner chamber of described housing, be provided with the spout hole of two chambers of communication with cavity in central authorities' wick bar, the sealing surface of described piston is provided with the overvoltage through hole, and a side of overvoltage through hole is provided with the decorative pearl on top of an official cap, and the sealing surface of piston is provided with the decorative pearl on top of an official cap is withstood on spring on the overvoltage through hole.

Piston can move at the inner chamber cathetus of housing, and engaging tooth also straight line moves, and rotates with the engaging tooth meshed gears, thereby whole closer axle is rotated on housing, realizes the folding of door leaf.As manually opening door leaf, the closer axle moves right piston, and closing spring is compressed simultaneously.The resisting medium of the inner chamber on right side flows in the inner chamber in left side by spout hole.Door leaf is released, compressed closing spring is roof pressure piston left just, the door leaf that piston drive closer axle is connected the closer axle forwards its make position to, the resisting medium of the inner chamber in left side flows in the inner chamber on right side by spout hole, the speed of resisting medium by spout hole is slower, and the closure of closing spring is played cushioning effect.

As open or the speed of closed door leaf greater than the speed of resisting medium by spout hole, will produce overvoltage, this moment, resisting medium can back down by the decorative pearl on top of an official cap that a side of overvoltage through hole is set, and spring is compressed, resisting medium just can pass through from the overvoltage through hole, eliminates the overvoltage phenomenon.Can establish two overvoltage through holes on the sealing surface of described piston, and at the heteropleural of these two overvoltage through holes the decorative pearl on top of an official cap and spring are set respectively, the overvoltage that produces at the open and close door leaf can be eliminated like this, thereby prevents overvoltage and cause the damage of door closer.

Description of drawings

Fig. 1 is the utility model cross-sectional view;

Fig. 2 is that the A-A of Fig. 1 is to generalized section;

Fig. 3 is the Facad structure schematic diagram of excess pressure valve;

Fig. 4 is the rear elevation of Fig. 3;

Fig. 5 is that the B-B of Fig. 3 is to generalized section;

Fig. 6 is that the C-C of Fig. 3 is to cross-sectional view.

The specific embodiment

Below in conjunction with accompanying drawing the specific embodiment of the present utility model is described in further detail, but does not constitute any restriction of the present utility model.

Among the figure: housing 1, inner chamber 2, resisting medium 3, piston 4, engaging tooth 5, closer axle 6, gear 7, closing spring 8, central wick bar 9, spout hole 10, overvoltage through hole 11, the decorative pearl on top of an official cap 12, spring 13, plastic hoop bowl 14, metal ring bowl 15, cylindrical 16, through hole 17, control valve 18, diaphragm seal 19, jump ring 20, sealing ring 21.

As depicted in figs. 1 and 2, door closer described in the utility model comprises housing 1, and housing 1 has the columned inner chamber 2 of a sealing, and the two ends of inner chamber 2 are by diaphragm seal 19 and jump ring 20 sealings.Be full of resisting medium 3 in the inner chamber 2, resisting medium 3 can be oil plant.But be provided with the piston 4 that straight line moves in the described inner chamber 2, piston 4 is divided into two chambers hermetically with inner chamber 2, piston 4 is provided with the engaging tooth 5 of arranging along its moving direction, rotate on the housing 1 and be equipped with closer axle 6, closer axle 6 passes inner chamber 2, its two ends extend outside the housing 1, are provided with sealing ring 21 between closer axle 6 and the housing to guarantee that resisting medium 3 can not spill.The part of closer axle 6 in housing 1 is provided with and engaging tooth 5 meshed gears 7, piston 4 moves at inner chamber 2 cathetus of housing 1, and engaging tooth 5 also straight line moves, and rotates with engaging tooth 5 meshed gears 7, thereby whole closer axle 6 is rotated on housing 1, realize the folding of door leaf.Described housing 1 top between the left end of the diaphragm seal 19 of the right-hand member of inner chamber 2 and piston 4 is provided with closing spring 8, and closing spring 8 can promote piston 4 and move at inner chamber 2 cathetus of housing 1.Be fixed with the central wick bar 9 of the sealing surface that passes piston 4 right-hand members in the inner chamber 2 of described housing 1, be provided with the spout hole 10 of two chambers of communication with cavity 2 in central authorities' wick bar 9, resisting medium 3 can flow to from the chamber of the right left both sides of inner chamber 2 and flows out by spout hole 10.

To shown in Figure 6, the sealing surface of described piston 4 is provided with overvoltage through hole 11 as Fig. 3, and a side of overvoltage through hole 11 is provided with the decorative pearl on top of an official cap 12, and the sealing surface of piston 4 is provided with the decorative pearl on top of an official cap 12 is withstood on spring 13 on the overvoltage through hole 11.

As manually opening door leaf, closer axle 6 moves right piston 4, and closing spring 8 is compressed simultaneously.The resisting medium 3 of the inner chamber 2 on right side flows in the inner chamber 2 in left side by spout hole 10.Door leaf is released, compressed closing spring 8 is roof pressure piston 4 left just, the door leaf that piston 4 drive closer axles 6 are connected closer axle 6 forwards its make position to, the resisting medium 3 of the inner chamber 2 in left side flows in the inner chamber 2 on right side by spout hole 10, resisting medium 3 is slower by the speed of spout hole 10, and the closure of closing spring 8 is played cushioning effect.

As open or the speed of closed door leaf greater than the speed of resisting medium 3 by spout hole 10, will produce overvoltage, the resisting medium 3 meetings this moment decorative pearl on top of an official cap 12 that one side of overvoltage through hole 11 is set backs down, and spring 13 is compressed, resisting medium 3 just can pass through from overvoltage through hole 11, eliminates the overvoltage phenomenon.Can establish two overvoltage through holes 11 on the sealing surface of described piston 4, and at the heteropleural of these two overvoltage through holes 11 decorative pearl on top of an official cap 12 and spring 13 are set respectively, the overvoltage that produces at the open and close door leaf can be eliminated like this.

Extremely shown in Figure 6 in conjunction with Fig. 1, the sealing surface of described piston 4 is by a disc and is located at the disc formed plastic hoop bowl 14 of annular sidewall on every side, be with a metal ring bowl 15 of fixedlying connected outside the plastic hoop bowl 14 with engaging tooth 5, the disc of described plastic hoop bowl 14 is provided with the cylindrical 16 that a central wick bar 9 of confession passes hermetically, the disc of described plastic hoop bowl 14 is provided with the through hole 17 of opening towards the disc of metal ring bowl 15, through hole 17 is used to realize the function of the overvoltage through hole 11 of a direction, when piston 4 during to left movement, plastic hoop bowl 14 is under the pressure effect of resisting medium 3, the disc of its disc and metal ring bowl 15 is close to, the opening of through hole 17 1 sides is close to the disc of metal ring bowl 15, resisting medium 3 can not pass through from through hole 17, when piston 4 moves right, as produce overvoltage, plastic hoop bowl 14 is under the pressure effect of resisting medium 3, the disc of its disc and metal ring bowl 15 unclamps, the opening of through hole 17 1 sides leaves the disc of metal ring bowl 15, resisting medium 3 can pass through from through hole 17, to eliminate the overvoltage that produce this moment.The decorative pearl on top of an official cap 12 is set on the right side 11 need of the overvoltage through hole of this kind structure and spring 13 is realized the overvoltage that piston 4 produces when left movement.

As shown in Figure 1, an end of described spout hole 10 is located on the side wall surface of central wick bar 9, is provided with the control valve 18 that can move axially an end that blocks described spout hole 10 in the described central wick bar 9.Regulate the position of control valve 18 in central wick bar 9, the position that makes control valve 18 block described spout hole 10 changes, just regulate spout hole 10 openings of sizes, resisting medium 3 changes by the speed of spout hole 10, has just regulated the speed of door leaf folding.

As shown in Figure 1, described central wick bar 9 and control valve 18 are regulated convenient for being threaded like this.

As depicted in figs. 1 and 2, the engaging tooth 5 on the described piston 4 is a needle roller, and needle roller is located between the two clamping plates, adopts the form of needle roller can make gear 7 more level and smooth with engaging tooth 5 engagements, reduces friction.

Claims

1. door closer, comprise housing (1), housing (1) has the inner chamber (2) of a sealing, be full of resisting medium (3) in the inner chamber (2), inner chamber (2) but in be provided with the piston (4) that straight line moves, piston (4) is divided into two chambers hermetically with inner chamber (2), piston (4) is provided with the engaging tooth (5) of arranging along its moving direction, housing (1) is gone up to rotate and is equipped with closer axle (6), closer axle (6) is provided with and engaging tooth (5) meshed gears (7), housing (1) top between end of inner chamber (2) and piston (4) one ends is provided with closing spring (8), it is characterized in that: be fixed with the central wick bar (9) that passes piston (4) sealing surface in the inner chamber (2) of described housing (1), be provided with the spout hole (10) of two chambers of communication with cavity (2) in central authorities' wick bars (9), the sealing surface of described piston (4) is provided with overvoltage through hole (11), one side of overvoltage through hole (11) is provided with the decorative pearl on top of an official cap (12), and the sealing surface of piston (4) is provided with the decorative pearl on top of an official cap (12) is withstood on spring (13) on the overvoltage through hole (11).

2. according to the described door closer of claim 1, it is characterized in that: the sealing surface of described piston (4) is by a disc and is located at the disc formed plastic hoop bowl of annular sidewall (14) on every side, be with a metal ring bowl (15) of fixedlying connected outside the plastic hoop bowl (14) with engaging tooth (5), the disc of described plastic hoop bowl (14) is provided with the cylindrical (16) that a central wick bar of confession (9) passes hermetically, and the disc of described plastic hoop bowl (14) is provided with the through hole (17) of opening towards the disc of metal ring bowl (15).

3. according to claim 1 or 2 described door closers, it is characterized in that: an end of described spout hole (10) is located on the side wall surface of central wick bar (9), is provided with the control valve (18) that can move axially an end that blocks described spout hole (10) in the described central wick bar (9).

4. according to claim 1 or 2 described door closers, it is characterized in that: described central wick bar (9) and control valve (18) are for being threaded.

5. according to claim 1 or 2 described door closers, it is characterized in that: the engaging tooth (5) on the described piston (4) is a needle roller.