CN219826553U

CN219826553U - Concealed door closer

Info

Publication number: CN219826553U
Application number: CN202320901863.0U
Authority: CN
Inventors: 朱力克; 成爱华
Original assignee: Suzhou Fuerda Industry Co ltd
Current assignee: Suzhou Fuerda Industry Co ltd
Priority date: 2023-04-20
Filing date: 2023-04-20
Publication date: 2023-10-13
Anticipated expiration: 2033-04-20

Abstract

The utility model discloses a hidden door closer, which comprises a first hinge piece fixed on a door frame and a second hinge piece fixed on a door leaf, wherein the second hinge piece is hinged to the first hinge piece through a hinge mechanism, one end of the second hinge piece, which is away from the hinge mechanism, is connected with the door closer, the door closer comprises a shell fixed on the second hinge piece and a piston arranged in the shell in a sliding way, a piston cavity corresponding to the piston is arranged in the shell, two ends of the piston are respectively connected with a pulling rod and a return rod, one end of the pulling rod, which is away from the piston, is in pin joint with the hinge mechanism, one end of the shell, which is away from the second hinge piece, is provided with a first sealing plug, one end of the return rod is in pin joint with the piston after penetrating through the first sealing plug in a sliding way, and the other end of the return rod is sleeved with a compression spring which is in contact with the first sealing plug. The hidden door closer is simple in structure, and stability and safety of door leaf opening and closing are improved.

Description

Concealed door closer

Technical Field

The utility model relates to the technical field of door closers, in particular to a hidden door closer.

Background

The hidden door closer is used as a necessary facility device of a modern building, is widely applied to various occasions requiring attractive appearance, such as hotel guest doors, office buildings, ordinary families and the like, is hidden and not exposed, and is convenient for integral beautification, decoration and the like. Along with the continuous development and progress of society, the national requirements on fire protection and security are higher and higher, and a plurality of access doors and fire doors are required to be provided with door closers; the door closer in the market at present mainly is independent setting, even make hidden structure, still need to realize the drive connection of door leaf and door frame through connecting rod and slide rail etc. so the mode that combines two into one door closer and hinge has appeared, but hydraulic pressure part design in the pivot of hinge, causes the hinge axle to be thicker, not only the structure is complicated, the life-span is short, still influences the aesthetic property of door. Accordingly, improvements are needed.

Disclosure of Invention

The utility model aims to provide a knot hidden door closer which overcomes the defects in the prior art.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

the utility model discloses a hidden door closer, which comprises a first hinge piece fixed on a door frame and a second hinge piece fixed on a door leaf, wherein the second hinge piece is hinged to the first hinge piece through a hinge mechanism, one end of the second hinge piece, which is away from the hinge mechanism, is connected with the door closer, the door closer comprises a shell fixed on the second hinge piece and a piston arranged in the shell in a sliding way, a piston cavity corresponding to the piston is arranged in the shell, two ends of the piston are respectively connected with a pulling rod and a return rod, one end of the pulling rod, which is away from the piston, is in pin joint with the hinge mechanism, one end of the shell, which is away from the second hinge piece, is provided with a first sealing plug, one end of the return rod is in pin joint with the piston after penetrating through the first sealing plug in a sliding way, and the other end of the return rod is sleeved with a compression spring which is in a supporting way of the first sealing plug.

Further, in the hidden door closer, a first sealing ring is arranged between the piston and the piston cavity.

Further, in the hidden door closer, a pressure release flow passage penetrating along the axial direction of the piston is arranged in the piston, and a bidirectional safety valve is arranged in the pressure release flow passage.

Further, in the hidden door closer, the first sealing plug is fixed at the corresponding end of the shell through threaded connection, and a second sealing ring is arranged between the first sealing plug and the shell.

Further, in the hidden door closer, a third sealing ring and a first bushing are arranged between the first sealing plug and the return rod, and the first bushing is arranged on one side, close to the piston, of the third sealing ring.

Further, in the hidden door closer described above, one end of the first sealing plug facing away from the housing is provided with a protection cover corresponding to the compression spring through threaded connection.

Further, in the hidden door closer, a second sealing plug is disposed at one end of the piston cavity, which is close to the second hinge piece.

Further, in the hidden door closer, a limiting boss is arranged at one end, close to the second hinge piece, of the second sealing plug, a limiting groove with the limiting boss is formed in the inner wall of the piston cavity, and the drawing rod penetrates through the second sealing plug in a sliding mode.

Further, in the hidden door closer, a fourth sealing ring is arranged between the second sealing plug and the piston cavity.

Further, in the hidden door closer, a fifth sealing ring and a second bushing are arranged between the second sealing plug and the drawing rod, and the second bushing is arranged on one side, close to the piston, of the fifth sealing ring.

Compared with the prior art, the hidden door closer disclosed by the utility model has a simple structure, integrates the door closer and the hinge, is arranged in the door leaf, beautifies the appearance, and improves the stability and safety of opening and closing of the door leaf.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present utility model, and other drawings may be obtained according to the drawings without inventive effort to those skilled in the art.

Fig. 1 is a schematic view of a hidden door closer according to an embodiment of the present utility model.

Fig. 2 is a schematic diagram of a piston according to an embodiment of the present utility model.

Fig. 3 shows a schematic structural view of a first sealing plug according to an embodiment of the utility model.

Fig. 4 shows a schematic view of the installation of the second sealing plug in an embodiment of the utility model.

Detailed Description

The following detailed description of the technical solutions according to the embodiments of the present utility model will be given with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1 to 4, a hidden door closer includes a first hinge piece fixed on a door frame and a second hinge piece fixed on a door leaf, the second hinge piece is hinged on the first hinge piece through a hinge mechanism, one end of the second hinge piece deviating from the hinge mechanism is connected with the door closer, the door closer includes a shell 1 fixed on the second hinge piece and a piston 2 slidably arranged in the shell 1, a piston cavity corresponding to the piston 2 is arranged in the shell 1, two ends of the piston 2 are respectively connected with a drawing rod 3 and a return rod 4, one end of the drawing rod 3 deviating from the piston 2 is connected with the hinge mechanism in a pin joint manner, one end of the shell 1 deviating from the second hinge piece is provided with a first sealing plug 5, one end of the return rod 4 is slidably penetrated through the first sealing plug 5 and then connected with the piston 2 in a pin joint manner, and the other end of the second hinge piece is sleeved with a compression spring 6 propped against the first sealing plug 5.

In the technical scheme, the hinge mechanisms of the first hinge sheet, the second hinge sheet and the connecting rod structure all belong to the prior art, such as a first valve body, a second valve body and a four-bar mechanism described in Chinese patent CN204627259U and the like, which are not described in detail herein, a conventional oil filling hole and an oil way system communicated with a piston cavity are arranged in the shell 1, and a regulating valve is arranged; the right end of the return force rod is of a stud structure and is propped against the right end of the compression spring through a nut and a gasket; in the opening process (when a door is opened) of the first hinge piece and the second hinge piece, the hinge mechanism pulls the pulling rod 3, so that the piston 2 and the return force rod 4 are driven to slide, the compression spring 6 is compressed, elastic potential energy is accumulated, after the door opening external force is removed, the compression spring 6 releases the elastic potential energy, the return force rod 4 resets, the piston 2 and the pulling rod 3 are driven to reset, the pulling rod 3 drives the first hinge piece and the second hinge piece to close (close the door) through the hinge mechanism, and the moving speed of the piston 2 is influenced by the flow speed of hydraulic oil, so that a buffer effect is achieved; the cylindrical pin is embedded at one end of the piston 2, which is close to the return force rod 4, and the end part of the return force rod 4 extends into the piston 2 and is connected with the cylindrical pin through clearance fit, so that the radial action between the return force rod 4 and the piston 2 is reduced, the stress of the piston 2 is ensured to be always along the axial direction of the piston, and the service life of the piston 2 is prolonged.

Illustratively, referring to fig. 1, a first seal ring is disposed between the piston 2 and the piston chamber.

In this technical scheme, processing respectively has annular mounting groove at the outer wall both ends of piston 2, and first sealing washer installs in the mounting groove can for sealed slip between piston 2 and the piston chamber, first sealing washer select for use current combination formula sealing washer, when guaranteeing the leakproofness, have higher wearability, extension its life.

As shown in fig. 1 and 2, for example, a pressure relief flow passage penetrating in the axial direction of the piston 2 is provided, and a bidirectional relief valve 7 is provided in the pressure relief flow passage.

According to the technical scheme, the pressure relief flow channel is used for communicating piston cavities at two sides of the piston, the bidirectional safety valve comprises a valve sleeve embedded in the pressure relief flow channel through a mounting bushing and a valve core sliding in the valve sleeve, a limiting pin is arranged at the left side of the valve core, an O-shaped ring is arranged between the right side of the valve core and the valve sleeve, when the door is opened, the piston moves leftwards, the pressure of hydraulic oil at the left side of the piston is increased, the hydraulic oil flows into the piston cavity at the right side of the piston along an oil circuit system, meanwhile, the valve core and the valve sleeve are propped open by the hydraulic oil, and excessive oil pressure caused by too high door opening speed and the like is avoided; when the door is closed, the piston moves rightwards, hydraulic oil in a piston cavity at the right side of the piston flows to a piston cavity at the left side along an oil way system, the valve core is pushed to extrude the O-shaped ring, the pressure release flow channel is not communicated, the door leaf is slowly closed, when the closing speed of the door leaf is accelerated by the action of external force in the closing process, the pressure of the hydraulic oil exceeds the elasticity of a spring in the valve core, the steel ball is jacked up, and the hydraulic oil flows leftwards along the flow channel in the valve core at the same time, so that the overlarge oil pressure is avoided; the two-way relief valve can be two-way switch-on piston chamber's left and right sides, only process a runner in the piston can, the miniaturized design of piston of being convenient for to reduce the holistic volume of door closer, reduce the trompil size on the door leaf, the left side of two-way relief valve is provided with the filter screen, and the installation bush supports and holds in the surface of filter screen, avoids its rocking, improves the filter effect, and the filter screen can avoid impurity to get into between case and the valve barrel.

As shown in fig. 1 and 3, for example, the first sealing plug 5 is fastened to the corresponding end of the housing 1 by means of a threaded connection and a second sealing ring 8 is arranged between the first sealing plug and the housing 1.

In this technical scheme, the right-hand member processing in piston chamber has the internal thread, and first sealing plug processing is with the external screw thread that corresponds with it, realizes the detachable connection in first sealing plug and piston chamber, and the outer end of internal screw thread is conical surface structure, and first sealing plug outer wall is protruding to stretch has sealed boss, and after the first sealing plug was screwed up, sealed boss was extrudeed the second sealing washer in conical surface structure, realizes sealing connection between first sealing plug and the casing.

As shown in fig. 1 and 3, a third sealing ring 9 and a first bushing 10 are provided between the first sealing plug 5 and the return rod 4, the first bushing 10 being arranged on the side of the third sealing ring 9 that is close to the piston 2.

In this technical scheme, third sealing washer quantity is two, forms dual seal, improves the leakproofness between first sealing plug and the back force pole, avoids hydraulic oil to reveal, guarantees the cushioning effect, and wear-resisting first bush can avoid the friction between back force pole and the first sealing plug, improves the life of first sealing plug, and first bush is close to the piston chamber setting, utilizes hydraulic oil to improve the lubricity between first sealing plug and the back force pole.

As shown in fig. 1 and 3, the end of the first sealing plug 5 facing away from the housing 1 is provided with a protective cap 11 corresponding to the compression spring 6 by means of a threaded connection.

In this technical scheme, processing has the blind hole in the terminal surface in the outside of first sealing plug, cooperation spanner etc. screw up first sealing plug in the casing, the both sides of sealed boss all are processed the external screw thread, casing and protective housing all can dismantle and be fixed in first sealing plug, in the assembly process, but manual promotion return force pole, will draw the pole to stretch out in the second hinge piece, it is convenient to connect in articulated mechanism, then with the protective housing installation can, avoid debris etc. to influence compression spring's compression or resume, return force pole, compression spring, piston and the coaxial setting of drawing the pole, reduce door closer's width or thickness, be convenient for miniaturized design and reduce the processing degree of difficulty of door leaf internal mounting hole.

Illustratively, referring to fig. 1, the piston cavity is provided with a second sealing plug 12 at an end thereof adjacent the second hinge piece.

In the technical scheme, the second sealing plug realizes the sealing between the corresponding end part of the pulling rod and the piston cavity.

As shown in fig. 1 and 4, a limiting boss is disposed at one end of the second sealing plug 12 close to the second hinge piece, a limiting groove with the limiting boss is disposed on the inner wall of the piston cavity, and the drawing rod 3 penetrates through the second sealing plug 12 in a sliding manner.

In this technical scheme, the casing passes through the bolt etc. to be fixed in the second hinge piece, and spacing boss is fixed to the terminal surface of spacing groove cooperation second hinge piece, and the piston intracavity is embedded completely to the second sealing plug, and need not connection structure such as processing screw thread, simplified structure.

As an example, a fourth sealing ring 13 is arranged between the second sealing plug 12 and the piston chamber, see fig. 1.

In the technical scheme, the outer wall of the second sealing plug is provided with two groups of sealing rings, so that double sealing is realized, and sealing between the second sealing plug and the piston cavity is improved.

As an example, referring to fig. 1, a fifth sealing ring 14 and a second bushing 15 are provided between the second sealing plug 12 and the drawbar 3, the second bushing 15 being provided on a side of the fifth sealing ring 14 close to the piston 2.

In this technical scheme, the fifth sealing washer improves the leakproofness between second sealing plug and the drawbar, avoids hydraulic oil to reveal, guarantees the buffering effect, and wear-resisting second bush can avoid the friction between drawbar and the second sealing plug, improves the life of second sealing plug, and the second bush is close to the piston chamber setting, utilizes hydraulic oil to improve the lubricity between second sealing plug and the drawbar, and the second bush still can improve the slip precision of drawbar, reduces the possibility that the drawbar produced radial force to the piston, improves the life of piston.

In summary, the hidden door closer disclosed by the utility model has a simple structure, integrates the door closer and the hinge, is arranged in the door leaf, beautifies the appearance, and improves the stability and safety of opening and closing of the door leaf.

It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

The foregoing is merely illustrative of the embodiments of this utility model and it will be appreciated by those skilled in the art that variations and modifications may be made without departing from the principles of the utility model, and it is intended to cover all modifications and variations as fall within the scope of the utility model.

Claims

1. The utility model provides a hidden door closer, includes the first hinge piece that is fixed in the door frame and the second hinge piece that is fixed in the door leaf, the second hinge piece pass through hinge mechanism articulated in first hinge piece, the one end that second hinge piece deviates from hinge mechanism is connected with the door closer, a serial communication port, the door closer is including the casing that is fixed in second hinge piece and the piston that slides and set up in the casing, be provided with the piston chamber that corresponds with the piston in the casing, the both ends of piston are connected with pull rod and return pole respectively, wherein, pull rod deviate from the one end pin joint of piston in hinge mechanism, the one end that the casing deviates from second hinge piece is provided with first sealing plug, return pole one end slip runs through behind the first sealing plug pin joint in the piston, the other pot head is equipped with the compression spring who supports to hold in first sealing plug.

2. A hidden door closer according to claim 1, wherein: a first sealing ring is arranged between the piston and the piston cavity.

3. A hidden door closer according to claim 1, wherein: the piston is internally provided with a pressure relief flow passage penetrating along the axial direction of the piston, and a bidirectional safety valve is arranged in the pressure relief flow passage.

4. A hidden door closer according to claim 1, wherein: the first sealing plug is fixed at the corresponding end part of the shell through threaded connection, and a second sealing ring is arranged between the first sealing plug and the shell.

5. A hidden door closer according to claim 4, wherein: and a third sealing ring and a first bushing are arranged between the first sealing plug and the return rod, and the first bushing is arranged on one side, close to the piston, of the third sealing ring.

6. A hidden door closer according to claim 4, wherein: one end of the first sealing plug, which is away from the shell, is provided with a protective cover corresponding to the compression spring through threaded connection.

7. A hidden door closer according to claim 1, wherein: and a second sealing plug is arranged at one end of the piston cavity, which is close to the second hinge piece.

8. A hidden door closer according to claim 7, wherein: the one end that the second sealing plug is close to the second hinge piece is provided with spacing boss, the inner wall in piston chamber be provided with spacing groove of spacing boss, the pull rod slip runs through the second sealing plug.

9. A hidden door closer according to claim 7, wherein: and a fourth sealing ring is arranged between the second sealing plug and the piston cavity.

10. A hidden door closer according to claim 7, wherein: a fifth sealing ring and a second bushing are arranged between the second sealing plug and the drawing rod, and the second bushing is arranged on one side, close to the piston, of the fifth sealing ring.