CN102959168A

CN102959168A - Door closer

Info

Publication number: CN102959168A
Application number: CN2011800315434A
Authority: CN
Inventors: 福尔克·比内克
Original assignee: Dorma Deutschland GmbH
Current assignee: Multi Makai pull Germany Co Ltd
Priority date: 2010-06-25
Filing date: 2011-06-14
Publication date: 2013-03-06
Anticipated expiration: 2031-06-14
Also published as: SG185779A1; EP2585662A1; WO2011160785A1; TW201202538A; DE102010017574A1; CN102959168B; DE102010017574B4

Abstract

The invention relates to a door closer, comprising a door closer housing, a drive unit which can be coupled to a door by means of a door closer shaft and a linkage and is disposed in the door closer housing, and a hydraulic damping unit, which has a damping piston which is guided in a damping cylinder of the door closer housing and is operatively connected to the drive unit. Said damping piston cooperates with a first oil discharge channel associated with a rapid door closing movement and a second oil discharge channel associated with a slow door closing movement, wherein the first and second discharge channels are disposed one after the other and wherein the first discharge channel, as seen looking in the direction of movement of the damping piston, is disposed downstream of the second discharge channel.

Description

Door closer

Technical field

The present invention relates to a kind of door closer of preamble according to claim 1.

Background technology

Most of time, spring-hydraulically operated door closer is used in the controlled of door system and cuts out.In manual unlocking operating period, the door closer beam warp is rotated by arm component, and energy-stored spring is preloaded via the drive unit in the door closer in addition.

For shutoff operation, energy-stored spring lax and in without any the situation of external energy drive unit and the arm component via door closer door is pushed back in its original position.

In order not make this operation occur suddenly and very fast, the whole spring force of the accumulator in the door closer is almost completely absorbed by hydraulic damping device.During shutoff operation, because the effect of piston face, so gather in the pressure medium chamber of damping device corresponding to the hydraulic pressure of spring force, this pressure almost remains on the system of power in the equilibrium state.

Enter controlled low fluid the storage area of door closer refluxes and is adjusted by means of control valve from the balancing gate pit.Therefore produced a little imbalance of the ratio of power, thereby door is owing to spring force is closed relatively slowly.

Utilize the only control valve for the whole door closing process that begins from any angle, can adjust same unique constant closing velocity, until door has reached fastening position.So when door reached fastening position, the bump of the base at door t door frame place was too inviolent, whole bolt down procedure needs to occur in a controlled manner.

The material, structure and the potted component that depend on door system, if close too quickly, then the Men Huicong doorframe rebounds, and can again partly flick.Thus, oscillating motion may occur, until door reaches complete resting position.

Yet, be intended to prevent that the closing velocity that is conditioned lentamente of above-mentioned effect has following shortcoming, namely need unnecessary long-time for the whole shutoff operation that begins from wider door open angle.For the very frequent door that uses, this time range is very important, because door leaf is back in the original position no longer fully usually.In addition, under low external temperature, because higher heat-energy losses, long shut-in time section has adverse effect.

Especially for lift tower, each second of the extra shut-in time of corresponding floor door all can cause the longer stand-by period of user on each floor, because in case whole door system is closed, car can leave.Because following technical reason, especially in this application scenarios, can not only increase closing velocity: because the door of hoist is equipped with limit switch and automatic door lock for fastening position, so the door leaf that rebounds owing to too fast closing velocity can hinder control sequence and cause the fault of whole system very much.

Only second close reduction range and can realize this solution of problem, wherein door speed was just slowed down before reaching original position consumingly, so that can finally close lentamente.This second close reduction range can be by the control valve adjustment of itself.Therefore, the first reduction range can be adjusted to quite soon, this obviously shortens whole shutoff operation.

Be divided in the known door closer of two or more scopes at whole hydraulic pressure shutoff operation, different velocity intervals are by means of daming piston, or the different discharge orifices of arranging are realized in the working surface of brake piston.Depend on that the discharge-channel in the balancing gate pit is opened via the piston edge or is closed corresponding to the piston position of corresponding door angle.In further process, discharge-channel is provided with differently controlled control valve, and this control valve allows to adjust different door speed.

Yet disadvantageously, this very simple control method only is suitable for the daming piston of relatively large fluid displacement amount and only is suitable for thus larger door closer, or drive unit in this known door closer.Because their low work displacement and their little piston faces specifically utilize the cam technical design to get very little door closer and do not have enough shift amounts.Because tolerance, either large or small large gap width is present between housing cylinder and the daming piston inevitably, thereby leak fluid can be discharged in not controlled mode.

If during the shutoff operation of door, closed by daming piston, perhaps, depend on function for one in the discharge-channel in the balancing gate pit, opened by daming piston during impulse stroke, then a certain amount of leak fluid is discharged in not controlled mode via the gap between piston and barrel.Hydraulic fluid attempts to find the path towards the low pressure gas storage space of door closer usually.This leak fluid does not allow to be identified for the accurate angle of starting point velocity interval or hydraulic function and terminal point.

For the larger door closer of the fluid displacement amount with each higher angle, this effect only has relatively little impact, yet for the door closer of the minimal design with very little Fluid Volume, because the problems referred to above, some hydraulic functions are infeasible.

Utilize another shortcoming of this control method of the discharge orifice in the barrel to be, can not adopt joint ring at daming piston in the time of most of because when joint ring above discharge orifice through out-of-date, the sealing ring can be very rapidly destroyed.The Seal Design that only has considerably less permission joint ring process above discharge orifice.Yet this dedicated sealing member needs larger size of components, and this dedicated sealing member can not be used in the very little door closer.

The possibility of the control gate closing velocity that another is known is to use one or more control valve, and this control valve is arranged in the threaded closure plug of cylinder chamber of door closer.Depend on an angle, and therefore corresponding with the shift position of daming piston, this control valve is by opening with the Mechanical Contact of the front of piston.In this case, discharge-channel is opened, thereby this controls hydraulic fluid to the backflow of the storage area of door closer by means of the downstream that is arranged in adjustable metering valve.By means of suitably hard spring or electromagnetic unit, the fluid pressure that control valve overcomes in the damping chamber keeps closing.Control valve only is opened with the daming piston Mechanical Contact time.The position of daming piston and therefore switching point be assigned to respectively certain open angle.Control valve also need to daming piston begin during the remainder stroke of the original position of door, to occur at the contact point place, and control valve need to correspondingly penetrate in the threaded closure plug.

Yet the shortcoming that this closing organ has is that the speed of door only can be adjusted to from slow level faster level.Because discharge orifice is additionally opened by control valve, so more throttling opening occurs, this has increased closing velocity.Because control valve penetrates in the threaded closure plug, this threaded closure plug need to form relative wide size accordingly with the remainder stroke of piston.This situation increases the structure length of whole door closer.

In addition, door closer is provided with hollow section, and this hollow section is used for discharging in the function control that stays open of hydraulic pressure.In this case, the housing of hollow section is fixed in the threaded closure plug of side direction, and at limited retainer place, this hollow section housing penetrates in the rotating seal ring of piston.Hydraulic fluid passes hollow section and flows to magnetic valve.When magnetic valve is supplied to energy, there is not hydraulic fluid can be back in the storage area of door closer, this realization stays open function.

During the opening operation of door, hollow section without pressure penetrate in the rotating seal ring of piston.In case only have opening operation to be terminated, energy-stored spring just attempts to relax, thereby hydraulic pressure gathers.Yet this door closer operates under relatively low operating pressure and with relatively high Fluid Volume.

In a word, it should be noted that the above-mentioned control selection of known door closer is unsuitable for having the very little door closer of high workload pressure, this is because leakage loss is too high, or spring force is excessively low for the retentive control valve cuts out reliably.

Summary of the invention

Therefore, the purpose of this invention is to provide one type door closer, the door closer of the type is indicated in the preamble of claim 1, this door closer even all allow control from the controlled door closing movement of closing at a slow speed that initially closes to fast door of door under little size and the high operating pressure having.

This solution of problem is realized by feature structure according to claim 1.

Because, depending on width and the closing velocity of weight, door, the door in closing has relatively high mass inertia, thus just before reaching fastening position, need to realize important deceleration, in order to reduce a large amount of energy.Therefore, the hydraulic pressure in the balancing gate pit of damping device raises and increases sharply to very high level.

Because little piston face, little door closer are worked under the basic very high stress level in damper cylinder inherently.In addition, because little impulse stroke only realizes considerably less shift amount.

Therefore, be necessary very accurately to be controlled to the transition of the second reduction range, and not controlled leakage loss does not occur.

Because be provided for the first reduction range and faster the return flow line of reduction range can have angle precision ground and definitely closely be closed, so door closer of the present invention meets these functional requirements fully, thereby for the at a slow speed closing movement of door, realize only to be flow back in the storage area by the second discharge-channel by the hydraulic fluid of daming piston displacement.Produce thus sufficiently high damping pressure, thereby guarantee to be postponed fully, be back to too quickly original position in order to prevent it.

Favourable further progress of the present invention is the theme of dependent claims.

Particularly, by arrange extension or bar at the daming piston place, can realize switching point, this switching point depends on an angle, or depends on travel position.

By means of the extension that cooperates with potted component, realize inclusion seal fully in the restriction position.Therefore, this layout is suitable for having the door closer system of the minimum of low fluid displacement (Fluid Volume) equally.

Faster the valve scope immediately and completely sealing cause avoiding any overtravel or slip.

Door closer of the present invention is fully without leaking, and this is for having the primary precondition of gathering with the faster pressure in the damper cylinder of the system of very little fluid displacement.This is preferably realized by door closer of the present invention, so that allow to make the door system near original position to slow down consumingly.

For realization speed from reducing to step by step soon slow, control valve is arranged such that preferably two control valves opened concurrently before the switching point of velocity interval, namely open with closing velocity faster.Light from this switching, hydraulic fluid only can be discharged via the balancing gate pit from damper cylinder of control valve at a slow speed thus.

Description of drawings

With reference to accompanying drawing, from the explanation of the example of following preferred embodiment, other details of the present invention, Characteristics and advantages will become obviously, wherein:

Fig. 1: show the longitdinal cross-section diagram that passes door closer of the present invention,

Fig. 2: show the enlarged drawing corresponding with the Fig. 1 in the zone of door closer, be furnished with damping device in this door closer, wherein for figure is simplified, the door closer housing is not shown,

Fig. 3: show the figure corresponding to Fig. 2, wherein discharge-channel is closed to be used for closing quickly door, and

Fig. 4: show the figure corresponding to Fig. 3 of the second embodiment of door closer of the present invention.

The specific embodiment

Illustrate door closer 1 of the present invention among Fig. 1, this door closer is provided with housing 6.Drive unit 20 is disposed in the housing 6, and this device can be attached to door via door closer axle 19 and arm component 18, and this Men Wei is shown specifically in the accompanying drawings.Drive unit 20 preferably is configured to cam driver, and this cam driver has cam disc 29 and has two rollers 30 and 31, and this cam disc quilt is in case the moment of torsion mode is arranged on the closer axle 19, and these two rollers bear against cam disc 29.In this case, roller 30 is supported on daming piston 24 places, and roller 31 is disposed in driven plunger 32 places, and this driven plunger is connected with energy-stored spring 21 operations, and this energy-stored spring is disposed in the housing 6.

In addition, door closer 1 has hydraulic damping device 23.This device comprises the daming piston 24 that is arranged in the housing 6, and daming piston 24 is directed in damper cylinder 5.As mentioned above, daming piston 24 is connected with drive unit 20 operations.

In addition, damping device 23 has first fluid discharge-channel 9 and second fluid discharge-channel 14, and first fluid discharge-channel 9 is allocated for the quick closedown campaign of door, and second fluid discharge-channel 14 is allocated for the at a slow speed closing movement of door.According to the present invention, along the direction of motion R observation of daming piston 24, first fluid discharge-channel 9 is arranged in second fluid discharge-channel 14 rears.

Among the embodiment of illustrated door closer 1, daming piston 24 is provided with lance shape extension 2 among Fig. 1 and Fig. 2, and lance shape extension 2 extends along the closing direction R of daming piston 24.In the illustrated embodiment, extension 2 realizes that via Special safety valve cell 3 this Special safety valve cell 3 is incorporated in in the daming piston 24.Yet the basic function of extension 2 and essential structure can or can realize by the extension of daming piston 24 by means of the simple straight-bar that is positioned at daming piston 24 places.

In the particularly preferred embodiment of Fig. 1 and Fig. 2, extension 2 is provided with chamfering 26 placed in the middle.

Potted component 7 with joint ring 8 inserts in the hollow chamber 9 ' of threaded closure plug 4 of damper cylinders 5, or in the hollow chamber 9 ' of door closer housing 6.

Joint ring 8 can construct and be made from a variety of materials by different way, and has equally the differently profile of executable operations.In illustrated embodiment, O shape ring is provided as joint ring 8.By means of another less threaded closure plug 16, hollow chamber 9 ' is sealed with respect to the external environment condition of door closer 1 liquid-tightly.

As viewed among Fig. 1 and Fig. 2, the discharge-channel 9 that is used for hydraulic fluid is arranged on threaded closure plug 4, and with potted component 7 continuities, this passage leads to circular passage 10.Control valve 12 10 is led to from the circular passage in hole 11, and control valve 12 allows the quick closedown of door by means of suitable adjustment.

Through control valve 12, the low pressure gas storage space 17 of door closer 1 is led to returning in the return flow line 13 in the door closer housing 6.

Discharge-channel 14 directly leads to another control valve 15 from the balancing gate pit of damper cylinder 5, this control valve 15 allows to cut out at a slow speed door by suitably adjusting.

In addition, as shown in Fig. 1 to Fig. 3, in the situation of example, potted component 7 is assembled by the

halfbody

41,42 of two tubbiness structures, and this halfbody can be coupled to each other.In exemplary situation, two

halfbodies

41 and 42 are screwed to each other, and in Fig. 2 and Fig. 3 under the illustrated condition, these two halfbodies limit internal admission chamber 43.

Compress Spring 22 is arranged in the internal admission chamber 43, and this Compress Spring bears against potted component 7 in the mode that an end points to shell end 25.At place, the other end, Compress Spring 22 bears against spring compressor 33, and spring compressor 33 is arranged in to admit in the chamber 43 and can operate with extension 2 and is connected.

Another Compress Spring 27 is arranged in around the potted component 7, and an end of this Compress Spring bears against threaded closure plug 4, or bears against the less threaded closure plug 16 that is arranged in the threaded closure plug 4.At place, the other end, Compress Spring 27 bears against the location shoulder 44 of potted component 7.

Among Fig. 1 to Fig. 3 in the illustrated embodiment, Compress Spring 22 has the spring rate harder than the second Compress Spring 27.

In addition, the 3rd Compress Spring 34 is arranged between daming piston 24 and the threaded closure plug 4.

In addition, Fig. 1 to Fig. 3 illustrates: in the continuity of the second control valve 15, the fluid drainage that enters in the storage area 17 occurs via return flow line 13, and this return flow line is arranged in the door closer housing 6.

The below will explain the functional sequence of above-mentioned door closer 1.

When the manual unlocking door, moment is introduced in the door closer axle 19 via arm component 18.By means of the help of drive unit 20, reciprocating motion can be from the generation that rotatablely moves, thereby energy-stored spring 21 is preloaded.

Simultaneously, daming piston 24 is advanced along the direction of door closer axle 19 with extension 2, thereby hydraulic fluid can flow to the balancing gate pit via the flap valve the daming piston and hole from the storage area 17 of door closer 1, or in the damper cylinder 5.

After door was released, energy-stored spring 21 was attempted to relax, and will be introduced into door closer axle 19 for closing required moment via the drive unit 20 of door closer 1.In order to prevent that this operation from suddenly occuring, via the reciprocating motion that rotatablely moving of door closer axle 19 is altered course into again daming piston 24, the reaction pressure of hydraulic pressure gathers in damper cylinder 5.

Because the wider open angle of door, for example be used for to realize more comfortable 75 ° of entering situation, in case door is released, then daming piston 24 just is arranged in the position of contiguous closer axle 19.Therefore, the extension 2 that is positioned at daming piston 24 places is fully lifted from potted component 7.

During shutoff operation, daming piston 24 approaches the threaded closure plug 4 that is in outer casing ends 25 places again.The position of daming piston 24 is corresponding with the contact point of the extension 2 that is in seal 7 places.Seal 7 remains to be opened.

In this case, the hydraulic fluid that is shifted by daming piston 24 during shutoff operation can flow in the hollow chamber 9 ' of threaded closure plug 4 by the inclined hole 28 in the threaded closure plug 4.

With before piston extension 2 contacts, potted component 7 is released the seal receptacle of less threaded closure plug 16 by Compress Spring 27 and is maintained in the open position thus.

Then, under the situation that seal receptacle is opened, the fluid by daming piston 24 displacement balancing gate pits 5 during shutoff operation flows to the housing 6 via

other discharge orifice

9,10 and 11 from hollow chamber 9 ' in the mode that is not obstructed.Continue, direction of flow is adjustable metering valve 12 faster again.Therefore, the further discharging of fluid occurs via the return port 13 of the storage area 17 that leads to door closer 1.Therefore, door can relatively promptly be closed.

Depend on design, for the beginning of the second closing velocity, the length that is positioned at the extension 2 at daming piston 24 places is suitable for needed switching point, or is suitable for needed door angle.

When reaching this angle, extension 2 is pressed against spring compressor 33 at first, and this spring compressor 33 is arranged in the rear side place of potted component 7.Spring compressor 33 itself is pressed against the border of potted component 7 by the Compress Springs 22 in the potted component 7, and this spring has the spring rate harder than the spring 27 of outside.

During the further shutoff stroke of daming piston 24, because different spring rates, the spring 27 that is arranged in potted component 7 outside on every side is compressed in fact, thereby whole potted component 7 is pushed in the seal receptacle 8 ' of inner threaded closure plug 16.Therefore, the discharge-channel 9 that leads to adjustable metering valve 12 faster suddenly and without being closed with leaking.

Thus, hydraulic fluid only can be expelled to slower adjustable metering valve 15 via the second discharge-channel 14, and this second discharge-channel 14 also is arranged in the daming piston 5.Therefore, very high pressure increase is gathered immediately, thereby door is slowed down dramatically and marches in the original position lentamente.

Because pressure increases, potted component 7 also is pressed in the seal receptacle 8 '.The strict location boundary of seal receptacle 8 ' expression potted component 7.

This be why daming piston 24 from handoff angle until the remainder stroke of the original position of door by the reason of Compress Spring 22 compensation, this Compress Spring 22 is incorporated in in the potted component 7.In this case, seal receptacle 8 ' continues to keep closing.

Because the higher spring rate of Compress Spring 22, only after reaching sealing station, significantly spring-compressed just occurs.Therefore, realize sequential control, this sequential control at first causes closing seal receptacle 8 ' by potted component 7, and therefore only allows the length of the piston stroke of compensate for residual.As a result, length compensation is incorporated in the potted component 7 fully, and allows thus very compact structure type.

The below will explain the second embodiment based on Fig. 4.All elements consistent with the element among Fig. 1 to Fig. 3 are by identical Reference numeral identification.Therefore, can be with reference to above-mentioned discussion.

In the illustrated embodiment, extension 2 is configured to guide sleeves 35 among Fig. 4, and this guide sleeves 35 is connected to daming piston 24.In illustrated embodiment, guide sleeves 35 is screwed to daming piston 24.

In this embodiment, potted component 7 is arranged in the interior chamber 45 of guide sleeves 35.In this case, potted component 7 is preloaded by means of Compress Spring 36, and with the bearing 40 that bears against guide sleeves 35, these bearing 40 contiguous shell end 25 are arranged.

Potted component 7 has the smooth sealing surfaces 46 of front, and this smooth sealing surfaces 46 can be resisted against the sealing surfaces 8 ' that is in place, housing side.In illustrated embodiment, sealing surfaces 8 ' is arranged in less threaded closure plug 16 places, and this threaded closure plug 16 is screwed to larger threaded closure plug 4.

In addition, the diagram of Fig. 4 explained between larger threaded closure plug 4 and the housing 6, or three joint rings 37 between threaded closure plug 16 and the threaded

closure plug

4,38 and 39 layout.

Because in this embodiment, potted component 7 is arranged in the threaded closure plug 16, so in this case, comprises that the potted component 7 of length compensation can be arranged in the daming piston 24, or in the guide sleeves 35 of daming piston 24.

Therefore, potted component 7 is pressed against the bearing 40 of guide sleeves 35 by means of Compress Spring 36, and Compress Spring 36 is disposed in the guide sleeves 35 in addition, and Compress Spring 36 is advanced during the whole impulse stroke of daming piston 24.

In this case, Compress Spring 36 usefulness that are merged in act on the length compensation of the remainder stroke of daming piston 24, and this length compensation remains from the switching point of reduction range until the original position of door.In addition, Compress Spring 36 assurance seal receptacles 8 ' are pressed to such an extent that close all the time, until door reaches original position.

All embodiment that explain above have something in common and are, at the limited switching point place for reduction range, potted component 7 marches to the seal receptacle 8 ' that is arranged in threaded closure plug 4 or threaded closure plug 16 usually, and close the discharge orifice of back, or towards the discharge-channel of adjustable metering valve 12 faster.

In this case, seal receptacle 8 ' can directly be arranged in the main thread sealing-plug 4 or in another less threaded closure plug 16, this less threaded closure plug 16 is arranged in the main thread sealing-plug 4.

When utilizing threaded closure plug 16 other inside or less, seal receptacle position and the therefore switching point of the reduction range capable of regulating that can become.

Closing seal receptacle 8 ' afterwards, sizable pressure increases generation, and this also is pushed into potted component 7 in the seal receptacle 8 ' extraly and guarantees without leak condition.For further shutoff operation, hydraulic fluid need to flow back in the storage area 17 by slower adjustable metering valve 15, and this causes closes door lentamente.

Reference numerals list

1 door closer

2 extensions (bar)

3 valve unit

4 threaded closure plug

5 damper cylinders

6 door closer housings

7 potted components

8 joint rings (O shape ring)

The 8' seal receptacle

9 for the discharge-channel of opening fast

The 9' hollow chamber

10 circular passages

11 holes

12 for the control valve of opening fast

13 discharge-channels

14 for the discharge-channel of opening at a slow speed

15 for the control valve of opening at a slow speed

16 second less threaded closure plug

17 storage areas

18 arm components

19 door closer axles

20 drive units

21 energy-stored springs

22 hard springs

23 damping devices

24 daming pistons

25 shell end

26 chamferings

27 Compress Springs

28 angling holes

29 cam discs

30 rollers

31 rollers

32 driven plunger

33 spring compressors

The 3rd Compress Spring between 34 threaded closure plug 4 and the daming piston 24

35 guide sleeves

36 Compress Springs

37 joint rings

38 joint rings

39 joint rings

40 bearings

41 halfbodies

42 halfbodies

43 admit the chamber

44 location shoulders

45 interior chamber

46 sealing surfaces

The R direction of motion

Claims (according to the modification of the 19th of treaty)

1. a door closer (1)

-have a door closer housing (6);

-having a drive unit (20), described drive unit (20) is arranged in the described door closer housing (6) and can be via door closer axle (19) and arm component (18) and be attached to door; And

-have a hydraulic damping device (23), described hydraulic damping device (23) has daming piston (24), described daming piston (24) is directed in the damper cylinder (5) of described door closer housing (6) and is connected with described drive unit (20) operation, described piston cooperates with first fluid discharge-channel (9) and second fluid discharge-channel (14), described first fluid discharge-channel (9) is allocated for the quick closedown campaign of described door, and described second fluid discharge-channel (14) is allocated for the at a slow speed closing movement of described door.

-wherein to observe along the direction of motion (R) of described daming piston (24), described first fluid discharge-channel (9) and described second fluid discharge-channel (14) be is characterized in that by ground layout after another

-to observe towards the end of described housing along the direction of motion (R) of described daming piston (24), described first fluid discharge-channel (9) is disposed in described second fluid discharge-channel (14) rear,

-wherein said daming piston (24) is provided with extension (2), and described extension (2) is configured to guide sleeves (35), and potted component (7) is arranged in the interior chamber (45) of described guide sleeves (35).

2. door closer according to claim 1 is characterized in that described the first discharge-channel (9) is provided with the first control valve (12) opened fast for described door.

3. door closer according to claim 1 and 2 is characterized in that described the second discharge-channel (14) is provided with the second control valve (15) opened at a slow speed for described door.

4. each described door closer in 3 according to claim 1 is characterized in that described the first discharge-channel (9) and described the second discharge-channel (14) are connected to return flow line (13), described return flow line (13) and storage area (17) UNICOM.

5. each described door closer in 4 according to claim 1 is characterized in that described extension (2) points to contiguous shell end (25).

6. door closer according to claim 5, it is characterized in that described extension (2) cooperates with potted component (7), described potted component (7) is disposed in the hollow chamber (9 ') of threaded closure plug (4), and described threaded closure plug (4) is inserted in the described shell end (25) of contiguous described daming piston (24).

7. door closer according to claim 6 is characterized in that described potted component (7) has the front sealing area, and described front sealing area can be against seal receptacle (8 '), and described seal receptacle (8 ') points to described front sealing area.

8. door closer according to claim 7 is characterized in that described sealing area is configured to joint ring (8), preferably becomes the shape of O ring.

9. each described door closer in 8 according to claim 6, it is characterized in that described potted component (7) has the halfbody (41,42) of two tubbiness structures, described halfbody (41,42) can be connected to each other, preferably can the mode of screwing being connected to each other, and described halfbody (41,42) limits inner admittance chamber (43) under the condition that described halfbody (41,42) connects.

10. door closer according to claim 9, it is characterized in that Compress Spring (22) is arranged in the described admittance chamber (43), described spring bears against described potted component (7) at the place, end that points to described shell end (25), and the place bears against the spring compressor (33) that is arranged in the described admittance chamber (43) in the other end, and described spring compressor can be connected by the operation with described extension (2).

11. each described door closer in 10 according to claim 6, it is characterized in that another Compress Spring (27) is arranged in described potted component (7) on every side, described another Compress Spring bears against at one end described threaded closure plug (4 or 16) and bears against the location shoulder (44) of described potted component (7) at other end place.

12. door closer according to claim 11 is characterized in that the described Compress Spring (22) in described admittance chamber (43) has than the hard spring rate of described Compress Spring (27).

13. each the described door closer in 12 is characterized in that the 3rd Compress Spring (34) is arranged between described daming piston (24) and the described threaded closure plug (4) according to claim 1.

14. door closer according to claim 1 is characterized in that can connecting, preferably can screwing to described daming piston (24) in described guide sleeves (35).

15. door closer according to claim 1, it is characterized in that being preloaded by means of Compress Spring (36) at described potted component (7), with the bearing (40) that bears against described guide sleeves (35), described bearing is arranged to contiguous described shell end (25).

16. door closer according to claim 15, it is characterized in that having at described potted component (7) the flat seal surface (46) of front, described flat seal surface can bear against sealing surfaces (8 '), described sealing surfaces is arranged in place, housing side, preferably is arranged in described threaded closure plug (4 or 16) and locates.

Claims

1. a door closer (1)

-have a door closer housing (6);

-to observe towards the end of described housing along the direction of motion (R) of described daming piston (24), described first fluid discharge-channel (9) is disposed in described second fluid discharge-channel (14) rear.

5. each described door closer in 4 according to claim 1 is characterized in that described daming piston (24) is provided with extension (2), and described extension (2) points to contiguous shell end (25).

14. door closer according to claim 5 is characterized in that being configured to guide sleeves (35) at described extension (2), described guide sleeves (35) can connect, preferably can screw to described daming piston (24).

15. door closer according to claim 14 is characterized in that described potted component (7) is arranged in the interior chamber (43) of described guide sleeves (35).

16. door closer according to claim 15, it is characterized in that being preloaded by means of Compress Spring (36) at described potted component (7), with the bearing (40) that bears against described guide sleeves (35), described bearing is arranged to contiguous described shell end (25).

17. according to claim 16 or each the described door closer in 17, it is characterized in that having at described potted component (7) the flat seal surface (46) of front, described flat seal surface can bear against sealing surfaces (8 '), described sealing surfaces is arranged in place, housing side, preferably is arranged in described threaded closure plug (4 or 16) and locates.