Door closing device

Abstract

The present application relates to a door closing device, comprising a fixed seat; a sliding plate arranged on the fixed seat and moving in one direction, the surface of the sliding plate being provided with a contact slope; a connecting arm pivotally connected to the sliding plate, which can drive the sliding plate to move relative to the fixed seat; an elastic member arranged on the fixed seat, which can generate elastic deformation when the connecting arm drives the sliding plate to move, and drive the sliding plate to move in the reverse direction after the acting force of the connecting arm disappears; a piston arranged on the fixed seat and a driving structure for driving the piston to move, the piston being in contact with the contact slope of the sliding plate; wherein, the movement direction of the piston is not parallel to the movement direction of the sliding plate. The door closing device can make the movement stroke of the piston smaller, reduce the occupied space of the piston, and increase the service life of the piston; different slope section positions and slope surface directions can also be set on the contact slope as needed to achieve different functions, such as buffering, positioning, strengthening torque, etc.

Description

Technical Field

[0001] This application belongs to the technical field of accessories for closures such as doors or windows, and relates to a door closing device, which is applicable to driving and controlling a closure such as a door from an open position to a closed position. Background Art

[0002] In the prior art, a door closer generally adopts a hydraulic damping buffer method to slow down the collision during closing. Usually, it is a micro hydraulic system composed of a one-way valve, a piston, an accumulator, etc. Its principle is roughly as follows: when opening the door, the piston moves, and at the same time, the compression spring stores energy. The piston pushes the hydraulic oil to flow from one side of the chamber through the opened one-way valve into the other side of the piston's chamber. After the door opening action ends, the compression spring releases energy to make the door close automatically. At the same time, the piston moves in the reverse direction, the one-way valve closes, and the hydraulic oil flows into one side of the chamber. The flow rate of the hydraulic oil flowing from the other side of the chamber into one side of the chamber can be adjusted and controlled, so as to achieve the control of the door closing speed.

[0003] The invention patent application with the publication number CN106232922A discloses a hydraulic hinge. The hydraulic hinge is in a long strip shape, and the piston and the door closing spring are arranged in parallel. Due to this layout of the piston and the door closing spring, when opening or closing the door, under the full circumferential movement of the piston, extrusion and relaxation occur, and the movement stroke of the piston is relatively large, which also shortens the service life of the piston. Summary of the Invention

[0004] This application aims to provide a door closing device, which can make the movement stroke of the piston smaller, reduce the occupied space of the piston, and increase the service life of the piston.

[0005] This application is realized through the following technical solutions.

[0006] A door closing device, characterized by comprising:

[0007] A fixed seat;

[0008] A slide plate arranged on the fixed seat and moving in one direction, and a contact slope surface is provided on the surface of the slide plate;

[0009] A connecting arm pivotally connected to the slide plate, which can drive the slide plate to move relative to the fixed seat;

[0010] An elastic member arranged on the fixed seat, which can generate elastic deformation when the connecting arm drives the slide plate to move, and drive the slide plate to move in the reverse direction after the acting force of the connecting arm disappears;

[0011] A piston arranged on the fixed seat and a driving structure for driving the piston to move, and the piston abuts against the contact slope surface of the slide plate; wherein, the movement direction of the piston is not parallel to the movement direction of the slide plate.

[0012] The technical effect of this technical solution is that, since the moving directions of the piston and the slide plate are non-parallel, the driven surface of the piston runs on the contact slope, and the moving stroke of the piston is controlled by the contact slope, enabling the moving stroke of the piston to be smaller, reducing the occupied space of the piston, and increasing the service life of the piston; different slope segment positions and slope directions can also be set on the contact slope as needed to achieve different functions, such as buffering, positioning, strengthening torque, and so on.

[0013] As an implementation manner of this technical solution, the contact slope is configured such that when the slide plate moves under the drive of the elastic component, the piston generates a damping acting force that impedes the movement of the slide plate or the piston generates an acting force that accelerates the movement of the slide plate, and the moving direction of the piston is different from that of the slide plate.

[0014] In this way, when the piston generates a damping acting force that impedes the movement of the slide plate, the piston can achieve damping of the slide plate and can buffer when closing the door, while when the piston generates an acting force that accelerates the movement of the slide plate, the piston can achieve functions such as strengthening torque and boosting pressure on the slide plate.

[0015] As an implementation manner of this technical solution, the contact slope is provided on the side wall of the slide plate, and the moving direction of the piston is perpendicular to that of the slide plate.

[0016] As an implementation manner of this technical solution, a first driven wheel is provided at the end of the piston, and the first driven wheel makes rolling contact with the contact slope of the slide plate.

[0017] As an implementation manner of this technical solution, one end of the connecting arm is pivotally connected to the slide plate, and the other end thereof is pivotally connected to the connecting seat or is integrally formed with a connecting seat at the other end.

[0018] As an implementation manner of this technical solution, a chute is formed on the slide plate, at least one pulley is provided on the fixed seat, and the slide plate is matched with the chute through the pulley to limit its moving direction and stroke.

[0019] As an implementation manner of this technical solution, the elastic component is a spring, and both ends of the elastic component are abutted between the slide plate and the fixed seat in a compressed state.

[0020] As an implementation manner of this technical solution, the drive structure further includes:

[0021] A first chamber and a second chamber provided on the fixed seat, and the first chamber and the second chamber are connected and communicated through a connecting channel;

[0022] A power piston and a power spring provided in the second chamber, the power piston is hermetically placed and movable in the second chamber, and the power spring abuts between the power piston and the inner wall of the second chamber;

[0023] Among them, the piston seal is placed in the first chamber and moves. The first chamber, the second chamber, and the connecting channel are filled with liquid, and the hydraulic power transmission between the power piston and the piston is realized through the liquid.

[0024] As an implementation of this technical solution, the driving structure further includes:

[0025] A first liquid outlet hole for connecting the first chamber and the connecting channel;

[0026] A second liquid outlet hole for connecting the first chamber and the connecting channel, where the first liquid outlet hole and the second liquid outlet hole are arranged at intervals along the piston movement direction;

[0027] A one-way valve is arranged between the first chamber and the connecting channel and is used to control the liquid to flow from the connecting channel to the first chamber.

[0028] As an implementation of this technical solution, it further includes a positioning component and a positioning spring. At least one positioning groove is provided on the sliding plate. One end of the positioning component is elastically abutted against the fixed seat through the positioning spring, and the other end abuts against the surface of the sliding plate and cooperates with the positioning groove to realize the positioning of the movement position of the sliding plate.

[0029] Furthermore, a second driven wheel is provided at the end of the positioning component close to the sliding plate. The second driven wheel rolls and abuts against the surface of the sliding plate and cooperates with the positioning groove to realize the positioning of the movement position of the sliding plate.

[0030] As an implementation of this technical solution, the door closing device further includes a pressurizing component and a pressurizing spring. The pressurizing component abuts against the contact slope surface of the sliding plate to control the increase or decrease of the force for driving the sliding plate to move when closing the door.

[0031] It should be understood that the above general description and the following detailed description are only exemplary and explanatory and cannot limit this application. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] By describing the exemplary embodiments of the present application in more detail in conjunction with the drawings, the above and other objects, features, and advantages of the present application will become more obvious. Among them, in the exemplary embodiments of the present application, the same reference numerals generally represent the same components.

[0033] Figure 1 is a schematic diagram of the overall structure of the door closing device shown in an embodiment of the present application.

[0034] Figure 2 is a schematic diagram of the internal structure of the door closing device shown in an embodiment of the present application after removing the fixed cover plate.

[0035] Figure 3 is an exploded structure diagram of the door closing device shown in an embodiment of the present application.

[0036] Figure 4 This is a schematic cross-sectional structure diagram of a door closing device shown in an embodiment of the present application.

[0037] Figure 5 This is a schematic structure diagram of a sliding plate shown in an embodiment of the present application.

[0038] Figure 6 This is another schematic structure diagram of a sliding plate shown in an embodiment of the present application.

[0039] Description of reference numerals:

[0040] 11 - Fixed seat; 111 - Connecting part; 112 - First chamber; 113 - Second chamber; 114 - First liquid outlet hole; 115 - Second liquid outlet hole; 116 - Fixed cover plate;

[0041] 12 - Sliding plate; 121 - Contact slope; 122 - Chute; 123 - Pulley; 124 - Positioning groove; 13 - Elastic member; 14 - Connecting arm; 141 - Connecting seat;

[0042] 15 - Piston; 151 - First driven wheel; 152 - Groove; 153 - Y-shaped sealing ring; 16 - Power piston; 17 - Power spring; 18 - Chamber cover plate; 181 - Connecting channel; 19 - Check valve; 20 - Adjusting oil needle;

[0043] 21 - Positioning member; 211 - Second driven wheel; 22 - Positioning spring. Detailed implementation manners

[0044] Next, the technical solutions in some embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in some embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0045] The technical solutions of the embodiments of the present application will be described in detail below in conjunction with the accompanying drawings.

[0046] This embodiment is a door closing device. The door closing device is used to drive and control a closing object such as a door from an open position to a closed position. For example, the door closing device is installed between the door and the door frame and is used to drive the door to rotate from the open position to the closed position after the door opening action is completed to achieve automatic closing of the door.

[0047] Such as Figures 1 to 6As shown in the figure, the door closing device includes a fixed seat 11, a sliding plate 12, a connecting arm 14, an elastic member 13, a piston 15, and a driving structure for driving the piston to move. The sliding plate 12 is movably arranged on the fixed seat 11 and can move linearly in one direction. A contact slope surface 121 is provided on the surface of the sliding plate 12; the connecting arm 14 is rotatably pivoted with the sliding plate 12, and the connecting arm 14 can drive the sliding plate 12 to move relative to the fixed seat 11; the elastic member 13 is arranged on the fixed seat 11, and the elastic member 13 can generate elastic deformation when the connecting arm 14 drives the sliding plate 12 to move, and drive the sliding plate 12 to move in the reverse direction after the acting force of the connecting arm 14 disappears; the driving structure is arranged on the fixed seat 11, the driving structure acts on the piston 15, and the piston 15 abuts against the contact slope surface 121 of the sliding plate 12;

[0048] In this way, by differentiating the movement directions of the piston 15 and the sliding plate 12, that is, the directions are non-parallel, the driven surface of the piston 15 runs on the contact slope surface 121, so that the movement stroke of the piston 15 is controlled by the contact slope surface 121, which can make the movement stroke of the piston 15 smaller, reduce the occupied space of the piston 15, and increase the service life of the piston 15; different slope section positions can also be set on the contact slope surface 121 as needed to achieve different functions, such as buffering, positioning, strengthening torque, etc.

[0049] As Figure 2 shown in the figure, the fixed seat 11 serves as the supporting main body of the device. A cavity for accommodating the sliding plate 12 and the elastic member 13 is provided on the fixed seat 11. The sliding plate 12 and the elastic member 13 are limited in the cavity by installing and fixing a cover plate 116. Two connecting parts 111 are provided at the front end of the fixed seat 11. The fixed seat 11 is fastened to the support, such as a door or a door frame, by screws passing through the screw holes on the connecting parts 111. An activity slot for the connecting arm 14 to pass through and avoid the movement of the connecting arm 14 is also provided at the front end of the fixed seat 11.

[0050] As Figure 2 shown in the figure, the contact slope surface 121 is configured such that when the sliding plate 12 moves under the drive of the elastic member 13, the piston 15 generates a damping acting force that hinders the movement of the sliding plate 12, and the movement direction of the piston 15 is different from that of the sliding plate 12. The contact slope surface 121 of the sliding plate 12 is provided on the surface of the upper side wall. The contact slope surface 121 is based on the movement direction of the sliding plate 12. The contact slope surface 121 can be a slope plane or a slope curved surface from high to low. As Figure 5 and Figure 6 shown in the figure, the slope curved surface can be a convex or concave arc surface, or a curved surface smoothly formed by the arc surface, and the high side is close to the connecting arm 14.

[0051] When the connecting arm 14 drives the skateboard 12 to move, the driven surface of the piston 15 is in a downhill state when contacting the contact slope 121, and the piston 15 does not generate a damping force on the skateboard 12. When the elastic member 13 drives the skateboard 12 and drives the connecting arm 14 to move in the opposite direction, the driven surface of the piston 15 is in an uphill state when contacting the contact slope 121, and the piston 15 generates a damping force that hinders the movement of the skateboard 12. The height difference of the contact slope 121 determines the movement stroke of the piston 15, and the contact slope 121 with a smaller height difference is used to reduce the movement stroke of the piston 15.

[0052] As Figure 2 and Figure 3 As shown in [relevant figures], in order to ensure the stable movement of the skateboard 12 and limit the movement stroke of the skateboard 12, a long chute 122 is formed on the skateboard 12, and two pulleys 123 are provided on the fixed seat 11 at a certain distance apart. The pulleys 123 are fixed on the fixed seat 11 and the fixed cover plate 116 through a rotating shaft and can rotate. The two pulleys 123 cooperate with the chute 122, and when the skateboard 12 moves, the inner wall of the chute 122 rolls with the pulleys 123 to reduce the friction when the skateboard 12 moves. When the skateboard 12 moves in one direction and the pulley 123 reaches one end of the chute 122, the skateboard 12 is blocked from continuing to move under the restriction of the pulley 123, so as to achieve the purpose of limiting the movement stroke of the skateboard 12.

[0053] As Figure 2 and Figure 3 As shown in [relevant figures], the elastic member 13 is a spring. The elastic member 13 serves as an energy storage member of the door closing device. Both ends of the elastic member 13 abut between the skateboard 12 and the fixed seat 11. When the door closing device is in the open position, the elastic member 13 is in a compressed state to store the power required for automatic door closing.

[0054] One end of the connecting arm 14 is pivotally connected to the skateboard 12 through a pin shaft and can rotate, and the other end is pivotally connected to the connecting seat 141 through a pin shaft and can rotate. In this way, both ends of the connecting arm 14 can rotate, thereby increasing the flexibility and adaptability of the door closing device. In other embodiments, the connecting seat 141 can also be integrally formed at the other end of the connecting arm 14 away from the skateboard 12.

[0055] Exemplarily, when the fixed seat 11 of the door closing device is installed on the door frame, the connecting seat 141 is installed on the door leaf, and vice versa. The connecting seat 141 is fastened by screws passing through the screw holes thereon, and there is no need to open a deep groove. Therefore, usually, the fixed seat 11 is installed on the door frame and the connecting seat 141 is installed on the door leaf, which is beneficial to ensuring the integrity of the door leaf without damaging the structure of the door leaf, and the construction is simple and does not affect the fire resistance of the door leaf.

[0056] As Figures 2 to 4As shown in the figure, a first driven wheel 151 is provided at the end of the piston 15, and the first driven wheel 151 is in rolling contact with the contact slope 121 of the slide plate 12 of the slide plate. Specifically, two spaced connection lugs are formed at the end of the piston 15, and the first driven wheel 151 is disposed between the two connection lugs and is connected to the two connection lugs by a rotating shaft, so that the first driven wheel 151 can rotate around the rotating shaft, and the piston 15 realizes rolling displacement with the contact slope 121 through the first driven wheel 151, reducing the friction generated by the movement.

[0057] As Figure 3 and 4 As shown in the figure, the piston 15 functions as a damper for the slide plate to achieve a buffering function. The driving structure is a hydraulic damping structure. The driving structure includes a power piston 16 and a power spring 17. A first chamber 112 and a second chamber 113 are provided on the fixed seat 11, and the first chamber 112 and the second chamber 113 are connected through a connection channel 181. Both the first chamber 112 and the second chamber 113 are cylindrical chambers.

[0058] The piston 15 is hermetically placed and moves inside the first chamber 112. A groove 152 is provided on the side wall of the piston 15, and a Y-shaped sealing ring 153 is installed in the groove 152 to achieve the seal between the piston 15 and the inner wall of the first chamber 112. The axis of the first chamber 112 is arranged non-parallel to the movement direction of the slide plate 12. Preferably, it is arranged vertically. In this way, the movement direction of the piston 15 inside the first chamber 112 is perpendicular to the movement direction of the slide plate 12.

[0059] The power piston 16 is hermetically placed and moves inside the second chamber 113. A groove is provided on the side wall of the power piston 16, and a Y-shaped sealing ring is installed in the groove to achieve the seal between the power piston 16 and the inner wall of the second chamber 113. The power spring 17 abuts between the side of the power piston 16 away from the connection channel 181 and the inner wall of the second chamber 113.

[0060] Liquid is filled in the first chamber 112, the second chamber 113 and the connection channel 181. The liquid can be hydraulic oil, etc. Hydraulic power transmission between the power piston 16 and the piston 15 is achieved through the liquid. When the door closing device is in the process of opening the door and the slide plate 12 moves towards the connecting arm 14, the power spring 17 drives the power piston 16 to squeeze the liquid from the second chamber 113 into the first chamber 112 through the connection channel 181, and the liquid pushes the piston 15 to move towards the side close to the slide plate 12. During the automatic door closing process, when the elastic member 13 releases and pushes the slide plate 12 to move towards the side away from the connecting arm 14, the contact slope 121 squeezes the piston 15 to move away from the slide plate 12, and the piston 15 squeezes the liquid from the first chamber 112 into the second chamber 113 through the connection channel 181, and the liquid pushes the power piston 16 to move and compress the power spring.

[0061] The above process of hydraulic power transmission is uniform, that is, during the entire automatic door closing process, the damping force of the piston 15 remains unchanged or changes very little. In actual situations, a smaller damping force is required in the early stage of the process, while a larger damping force is required closer to the closing position to prevent excessive speed and collision at the closing position.

[0062] As Figure 4 shown in, for this purpose, the driving structure further includes a first liquid outlet hole 114 for communicating the first chamber 112 with the connection channel 181, a second liquid outlet hole 115 for communicating the first chamber 112 with the connection channel 181, and a one-way valve 19. The first liquid outlet hole 114 and the second liquid outlet hole 115 are arranged at intervals along the movement direction of the piston 15. The one-way valve 19 is arranged between the first chamber 112 and the connection channel 181, and the one-way valve 19 is used to control the liquid to flow from the connection channel 181 to the first chamber 112, and the liquid cannot flow from the first chamber 112 into the connection channel 181 through the one-way valve 19.

[0063] The first liquid outlet hole 114 and the second liquid outlet hole 115 are arranged at intervals. During the movement of the piston 15 towards the one-way valve 19, at the beginning, the liquid in the first chamber 112 will flow out from both the first liquid outlet hole 114 and the second liquid outlet hole 115 simultaneously. At this time, the flow rate is large, the piston 15 moves quickly, and the damping force it generates on the slide plate 12 is also small. When the piston 15 moves to a certain position, the side wall of the piston 15 will cover the first liquid outlet hole 114, and only the second liquid outlet hole 115 can supply the liquid to flow out. At this time, the flow rate becomes smaller, the piston 15 moves slower, and the damping force it generates on the slide plate 12 also becomes larger.

[0064] Exemplarily, the inlets of the first liquid outlet hole 114 and the second liquid outlet hole 115 are both located on the side wall of the first chamber 112. The one-way valve 19 is sealed and installed at one end of the first chamber 112 away from the slide plate 12. Adjusting oil needles 20 are respectively installed in the first liquid outlet hole 114 and the second liquid outlet hole 115 to adjust the passing flow rate. A chamber cover plate 18 is also installed on the fixed seat 11 to cover the first chamber 112 and the second chamber 113. Removing the chamber cover plate 18 can facilitate the installation of the one-way valve 19, the piston 15, the power spring 17, and the power piston 16, as well as filling the liquid. The connection channel 181 is arranged on the chamber cover plate 18, and an oil storage cover is also installed at one end of the second chamber 113 close to the chamber cover plate 18.

[0065] In order to position the sliding plate 12 at the fully open position and the closed position, the door closing device further includes a positioning member 21 and a positioning spring 22. A cavity for accommodating the positioning member 21 and the positioning spring 22 is formed on the fixed seat 11. One end of the positioning member 21 is elastically abutted against the inner wall of the cavity of the fixed seat 11 through the positioning spring 22, and the other end is provided with a second driven wheel 211. Two positioning grooves 124 are provided on the sliding plate 12, and the two positioning grooves 124 respectively correspond to the open position and the closed position. The second driven wheel 211 abuts against the surface of the sliding plate 12, and the second driven wheel 211 cooperates with the positioning groove 124 to realize the positioning of the movement position of the sliding plate 12.

[0066] The embodiments of the present application have been described above. The above description is exemplary and not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations are obvious to those of ordinary skill in the art in the technical field without departing from the scope and spirit of the described embodiments. The selection of the terms used herein is intended to best explain the principles of the embodiments, the practical application or the improvement of the technology in the market, or to enable other ordinary skill in the art in the technical field to understand the embodiments disclosed herein.

Claims

1. A door closing device, characterized in that, Comprising: Fixed seat; A slide plate disposed on the fixed seat and moving in one direction, with a contact slope surface provided on the surface of the slide plate; A connecting arm pivotally connected to the slide plate, which can drive the slide plate to move relative to the fixed seat; An elastic member disposed on the fixed seat, which can generate elastic deformation when the connecting arm drives the slide plate to move, and drive the slide plate to move in the reverse direction after the acting force of the connecting arm disappears; A piston disposed on the fixed seat and a driving structure for driving the piston to move, the piston abuts against the contact slope surface of the slide plate; wherein, the movement direction of the piston is not parallel to the movement direction of the slide plate.

2. The door closing device according to claim 1, characterized in that, The contact slope surface is configured such that when the slide plate moves under the drive of the elastic member, the piston generates a damping acting force that hinders the movement of the slide plate or the piston generates an acting force that accelerates the movement of the slide plate, and the movement direction of the piston is different from the movement direction of the slide plate.

3. The door closing device according to claim 1, characterized in that, The movement direction of the piston is perpendicular to the movement direction of the slide plate.

4. The door closing device according to claim 1, characterized in that One end of the connecting arm is pivotally connected to the slide plate, and the other end is pivotally connected to the connecting seat or integrally formed with the connecting seat at the other end.

5. The door closing device according to claim 1, characterized in that, A chute is formed on the slide plate, and at least one pulley is provided on the fixed seat. The slide plate is matched with the chute through the pulley to limit its movement direction and stroke.

6. The door closing device according to claim 1, characterized in that, The elastic member is a spring, and both ends of the elastic member abut between the slide plate and the fixed seat in a compressed state.

7. The door closing device according to claim 1, characterized in that, The driving structure includes: A first chamber and a second chamber disposed on the fixed seat, the first chamber and the second chamber are connected and communicated through a connecting channel; A power piston and a power spring disposed in the second chamber, the power piston is hermetically placed and movable in the second chamber, and the power spring abuts between the power piston and the inner wall of the second chamber; Wherein, the piston is hermetically placed and movable in the first chamber, and a liquid is filled in the first chamber, the second chamber and the connecting channel, and the hydraulic power transmission between the power piston and the piston is realized through the liquid.

8. The door closing device according to claim 7, characterized in that, The driving structure further includes: A first liquid outlet hole for communicating the first chamber with the connecting channel; A second liquid outlet hole for communicating the first chamber with the connecting channel, wherein the first liquid outlet hole and the second liquid outlet hole are arranged at intervals along the movement direction of the piston; A one-way valve is disposed between the first chamber and the connecting channel for controlling the liquid to flow from the connecting channel to the first chamber.

9. The door closing device according to claim 1, characterized in that, The closing device further includes a positioning member and a positioning spring. At least one positioning groove is provided on the slide plate. One end of the positioning member is elastically abutted against the fixed seat through the positioning spring, and the other end abuts against the surface of the slide plate and is matched with the positioning groove to realize the movement position positioning of the slide plate.

10. The door closing device according to claim 1, characterized in that, The closing device further includes a pressurizing member and a pressurizing spring. The pressurizing member abuts against the contact slope surface of the slide plate to control the increase or decrease of the force for driving the slide plate to move when closing the door.

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