Automatic door opening device for vertical hinged door

Abstract

The utility model discloses an automatic door opening device for a vertical hinged door, which relates to the technical field of automatic door openers, and comprises a door opening mechanism arranged in a door frame cross beam, the door opening mechanism comprises a speed reducing motor, a flat spiral spring, a spring shell and a shaft connecting piece, and the flat spiral spring is sleeved on an output shaft of the speed reducing motor. The spring shell covers the outer side of the flat spiral spring, one end of the flat spiral spring is connected with the output shaft, the other end of the flat spiral spring is connected with the spring shell, the output shaft is connected with the door leaf through the shaft connecting piece, and the gear motor can drive the output shaft to rotate so as to open and close the door leaf. When the door leaf is in an open state, the flat spiral spring is in a tightened state, and otherwise, the flat spiral spring is in a loosened state. The automatic door opening device for the vertical hinged door has the power-off door closing function and can be installed in a door frame cross beam in a hidden mode, the service life is prolonged, and the overall shape of a door leaf is prevented from being damaged.

Description

Technical Field

[0001] The utility model relates to the technical field of automatic door openers, in particular to an automatic door opening device for a swing door. Background Art

[0002] At present, an automatic door opener is usually set to realize the automatic opening and closing of a door leaf. However, the existing automatic door openers are all electrically driven. When power is cut off, the automatic door opener cannot work. For some special doors, such as fire doors, when a fire occurs, the fire door needs to be closed. If a conventional automatic door opener is used, since power is usually cut off when a fire occurs, its automatic closing of the fire door cannot be realized.

[0003] Although some door openers with a power-off door closing function have emerged on the market one after another, their energy storage elements usually adopt compression or tension springs, resulting in a relatively large volume in the length direction. Therefore, the above-mentioned door openers usually have a long strip shape and are only suitable for installation on the outer side of the door frame cross beam. And because the door opener is exposed, it seriously affects the overall appearance of the door and is likely to have a short service life due to rain or dust entering.

[0004] Therefore, there is an urgent need to provide an automatic door opening device for a swing door to solve the above problems existing in the prior art. Summary of the Utility Model

[0005] The purpose of the utility model is to provide an automatic door opening device for a swing door to solve the above problems existing in the prior art, which has a power-off door closing function, can also hide the automatic door opening device for a swing door inside the door frame cross beam, extend the service life, and avoid damaging the overall shape of the door leaf.

[0006] To achieve the above purpose, the utility model provides the following solution:

[0007] The utility model provides an automatic door opening device for a swing door, including a door opening mechanism. The door opening mechanism is used to be installed inside the door frame cross beam. The door opening mechanism includes a reduction motor, a flat spiral spring, a spring housing, and a shaft connecting piece. The flat spiral spring is sleeved on the output shaft of the reduction motor. The spring housing covers the outside of the flat spiral spring. One end of the flat spiral spring is connected to the output shaft, and the other end is connected to the spring housing. The output shaft can be connected to the door leaf through the shaft connecting piece. The reduction motor can drive the output shaft to rotate to realize the opening and closing of the door leaf.

[0008] Wherein, when the door leaf is in the open state, the flat spiral spring is in a tightened state. When the door leaf is in the closed state, the flat spiral spring is in a relaxed state.

[0009] Preferably, the controller and the switching power supply of the automatic door opening device for the French door are both arranged inside the door frame cross beam, and the controller is signal - connected to the reduction motor for controlling the reduction motor, and the switching power supply is used to supply power to the controller and the reduction motor.

[0010] Preferably, the door opening mechanism further includes a mounting base plate, the reduction motor is fixed on the mounting base plate, and the mounting base plate is fixed on the inner bottom surface of the door frame cross beam by screws.

[0011] Preferably, the reduction motor is a DC brushless reduction motor.

[0012] Preferably, a motor housing is sleeved outside the reduction motor, the top end of the output shaft passes upward through the motor housing and is sleeved with the flat spiral spring, and the bottom end of the output shaft passes downward through the door frame cross beam and is connected to the shaft connecting piece.

[0013] Preferably, a thrust bearing is further arranged at the top end of the output shaft for limiting the flat spiral spring.

[0014] Preferably, the spring housing is sleeved outside the top end of the output shaft and is fixed on the motor housing by fixing screws.

[0015] Preferably, the shaft connecting piece is a connecting arm, one end of the connecting arm is sleeved on the output shaft, and the other end is rotatably connected to the top surface of the door leaf.

[0016] Preferably, a limiting structure is arranged between the connecting arm and the output shaft for restricting the relative rotation and axial movement of the connecting arm and the output shaft.

[0017] The utility model has achieved the following technical effects compared with the prior art:

[0018] In the utility model, the door opening mechanism includes a reduction motor, a flat spiral spring, a spring housing and a shaft connecting piece. The flat spiral spring is sleeved on the output shaft of the reduction motor, and one end of the flat spiral spring is connected to the output shaft and the other end is connected to the spring housing. The reduction motor can drive the output shaft to rotate forward and backward, and at the same time drive the flat spiral spring to wind up or relax, and realize the opening and closing of the door leaf. Among them, when installing the automatic door opening device for the French door, the closing position of the door leaf is set as the limit relaxation position of the flat spiral spring, and the fully opened position of the door leaf is set as the limit tightening position of the flat spiral spring. When the automatic door opening device for the French door is powered off, the reduction motor stops running. If the door leaf is not in the closing position at this time, the flat spiral spring that has been wound up and stored energy will naturally rotate and expand towards the relaxation position (closing position), thereby driving the output shaft to rotate, and driving the door leaf to rotate and close through the shaft connecting piece, realizing the power - off closing function, which can meet the special requirements of some special doors (such as fire doors).

[0019] Furthermore, a flat spiral spring is adopted as the energy storage element in the present utility model. Compared with the existing compression or tensile springs, it has a smaller volume in the length direction, making the overall structure of the automatic door opening device for the swing door compact. It can be directly installed inside the door frame crossbeam, with minimal impact on the appearance of the door leaf and basically no damage to the overall shape of the door leaf. It can be widely applied to occasions with high appearance requirements for the door leaf, especially suitable for various high-grade buildings, and has broad market application prospects. Moreover, since the automatic door opening device for the swing door is hidden and installed inside the door frame crossbeam, it can effectively prevent rain and dust from entering, which is beneficial to extending the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0021] Figure 1 It is the installation schematic diagram of the automatic door opening device for the swing door in the embodiment of the present utility model;

[0022] Figure 2 It is the front view of the automatic door opening device for the swing door in the embodiment of the present utility model;

[0023] Figure 3 It is the structural schematic diagram of the door opening mechanism in the embodiment of the present utility model;

[0024] Figure 4 It is the top view (removing the spring housing) of the door opening mechanism in the embodiment of the present utility model.

[0025] In the figure: 1 - door opening mechanism, 101 - mounting base plate, 102 - output shaft, 103 - spring housing, 104 - flat spiral spring, 105 - reduction motor, 2 - controller, 3 - switching power supply, 4 - door frame crossbeam, 5 - shaft connecting piece, 6 - door leaf. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model.

[0027] The purpose of the present utility model is to provide an automatic door opening device for a flat door, so as to solve the problems existing in the above-mentioned prior art, which has a power-off door closing function, and can also hide the automatic door opening device for the flat door inside the door frame cross beam, extend the service life, and avoid damaging the overall shape of the door leaf.

[0028] In order to make the above-mentioned objects, features and advantages of the present utility model more obvious and understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] Embodiment 1

[0030] As Figures 1 - 4 shown, this embodiment provides an automatic door opening device for a flat door, including a door opening mechanism 1. The door opening mechanism 1 is used to be installed inside the door frame cross beam 4. The door opening mechanism 1 includes a reduction motor 105, a flat spiral spring 104, a spring housing 103 and a shaft connecting member 5. The flat spiral spring 104 is sleeved on the output shaft 102 of the reduction motor 105. The spring housing 103 covers the outside of the flat spiral spring 104. One end of the flat spiral spring 104 is connected to the output shaft 102, and the other end is connected to the spring housing 103. The output shaft 102 can be connected to the door leaf 6 through the shaft connecting member 5. The reduction motor 105 can drive the output shaft 102 to rotate forward and backward, simultaneously drive the flat spiral spring 104 to wind up or unwind, and realize the opening and closing of the door leaf 6;

[0031] Among them, when installing the automatic door opening device for the flat door, the closing position of the door leaf 6 is the limit relaxation position of the flat spiral spring 104, and the fully opened position of the door leaf 6 is the limit winding position of the flat spiral spring 104. When the automatic door opening device for the flat door loses power, the reduction motor 105 stops running. If the door leaf 6 is not in the closing position at this time, the flat spiral spring 104 that has been wound up and stored energy will naturally rotate and expand towards the relaxation position (closing position), thereby driving the output shaft 102 to rotate, and driving the door leaf 6 to rotate and close through the shaft connecting member 5, realizing the power-off door closing function, which can meet the special requirements of some special doors (such as fire doors).

[0032] Furthermore, in this embodiment, a flat spiral spring 104 is used as the energy storage element. Compared with the existing compression or tension springs, its volume in the length direction is smaller, making the overall structure of the automatic door opening device for the flat door compact. It can be directly installed inside the door frame cross beam 4, with minimal impact on the appearance of the door leaf 6, and basically does not damage the overall shape of the door leaf 6. It can be widely used in occasions with high appearance requirements for the door leaf 6, especially suitable for various high-class halls and buildings, and has broad market application prospects. Moreover, since the automatic door opening device for the flat door is hidden inside the door frame cross beam 4, it can effectively prevent rain and dust from entering, which is beneficial to extending the service life.

[0033] In this embodiment, the controller 2 and the switching power supply 3 of the automatic door opening device for the French door are both arranged inside the door frame cross beam 4, and the controller 2 is signal-connected to the reduction motor 105 for controlling the reduction motor 105, and the switching power supply 3 is used to supply power to the controller 2 and the reduction motor 105; among them, both the controller 2 and the switching power supply 3 can be commercially available products. For example, the controller 2 can select MPC-4700 of Shenyang Haide Boger Company, and the switching power supply 3 is a common DC24V / 200W. The controller 2 controls the reduction motor 105 to drive the output shaft 102 to rotate, and then drives the door leaf 6 to rotate forward and backward according to the instructions and set parameters through the shaft connecting piece 5 fixed on the door leaf 6 to achieve the purpose of opening and closing the door.

[0034] In this embodiment, the door opening mechanism 1 further includes a mounting base plate 101, the reduction motor 105 is fixed on the mounting base plate 101, and the mounting base plate 101 is fixed on the inner bottom surface of the door frame cross beam 4 by screws.

[0035] In this embodiment, the reduction motor 105 is preferably a DC brushless reduction motor, which is configured with a set of reduction gears to achieve speed reduction; among them, the output shaft 102 of the reduction motor 105 is lengthened to facilitate sleeving the flat spiral spring 104 and connecting with the shaft connecting piece 5.

[0036] In this embodiment, a motor housing is further sleeved outside the reduction motor 105, the top end of the output shaft 102 passes upward through the motor housing and sleeves the flat spiral spring 104, and the bottom end of the output shaft 102 passes downward through the door frame cross beam 4 and is connected to the shaft connecting piece 5. Further, a thrust bearing is also arranged at the top end of the output shaft 102 for limiting the flat spiral spring 104.

[0037] In this embodiment, the spring housing 103 is sleeved outside the top end of the output shaft 102 and is fixed on the motor housing by fixing screws.

[0038] In this embodiment, as Figure 2 shown, the shaft connecting piece 5 is a connecting arm, one end of the connecting arm is sleeved on the output shaft 102, and the other end is rotatably connected to the top surface of the door leaf 6; further, a limiting structure is also arranged between the connecting arm and the output shaft 102 for restricting the relative rotation and axial movement of the connecting arm and the output shaft 102.

[0039] Among them, it should be further explained that the output shaft 102 in this embodiment is not limited to as Figure 2The exposed shaft head shown can also be an indented shaft head. The limiting structure provided between the connecting arm and the output shaft 102 may include a single key and a corresponding keyway, or a cross key and a corresponding keyway. The single or cross key and the corresponding keyway are respectively arranged on the output shaft 102 and the shaft connecting member 5; alternatively, a square shaft section or other regular polygon shaft sections can be provided at the bottom end of the output shaft 102, and a shaft hole corresponding to the shaft connecting member 5 is provided, which can be sleeved on the output shaft 102 and is in interference fit; alternatively, other various connection methods can also be selected according to specific working needs. Further, the shaft connecting member 5 is not limited to the above-mentioned connecting arm, and connection forms such as a rotating arm - sliding groove and a curved arm structure can also be selected to push or pull the opening and closing of the door leaf 6.

[0040] The working principle of the automatic door opening device for the side - hung door in this embodiment is as follows:

[0041] When the automatic door opening device for the side - hung door is powered on, under the control of the controller 2, the output shaft 102 of the reduction motor 105 rotates in the forward and reverse directions, and at the same time drives the flat spiral spring 104 to wind up or unwind, and drives the door leaf 6 to rotate in the forward and reverse directions through the shaft connecting member 5 fixed at the bottom end of the output shaft 102, that is, the door opening or closing is realized.

[0042] When the automatic door opening device for the side - hung door is powered off, the controller 2 has no signal output, and the reduction motor 105 stops operating; if the door leaf 6 is not in the closed position at this time, the flat spiral spring 104 that has been wound up and stored energy will naturally rotate and expand towards the relaxed position (closed position), thereby driving the output shaft 102 to rotate, and driving the door leaf 6 to rotate and close through the shaft connecting member 5.

[0043] In the present utility model, specific examples are used to elaborate on the principle and implementation manner of the present utility model. The description of the above embodiments is only used to help understand the method and its core idea of the present utility model; at the same time, for those of ordinary skill in the art, according to the idea of the present utility model, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present utility model.

Claims

1. An automatic door opening device for a swing door, characterized in that: The invention comprises a door opening mechanism, which is used to be installed in the door frame crossbeam, and comprises a reduction motor, a plane scroll spring, a spring housing and a shaft connecting piece, wherein the plane scroll spring is sleeved on the output shaft of the reduction motor, the spring housing is covered on the outside of the plane scroll spring, and one end of the plane scroll spring is connected to the output shaft, and the other end is connected to the spring housing, the output shaft can be connected to the door leaf through the shaft connecting piece, and the reduction motor can drive the output shaft to rotate to realize the opening and closing of the door leaf; Wherein, when the door leaf is in an open state, the planar scroll spring is in a contracted state, and when the door leaf is in a closed state, the planar scroll spring is in a relaxed state.

2. The automatic door opening device for a swing door according to claim 1, characterized in that: The controller and the switching power supply of the automatic door opening device for the swing door are both arranged in the door frame crossbeam, and the controller is connected to the reduction motor signal for controlling the reduction motor, and the switching power supply is used to power the controller and the reduction motor.

3. The automatic door opening device for a swing door according to claim 1, characterized in that: The door opening mechanism also includes a mounting base plate, the reduction motor is fixed on the mounting base plate, and the mounting base plate is fixed to the inner bottom surface of the door frame crossbeam by screws.

4. The automatic door opening device for a swing door according to claim 1, characterized in that: The reduction motor is a brushless DC reduction motor.

5. The automatic door opening device for a swing door according to claim 4, characterized in that: The outer cover of the reduction motor is provided with a motor housing, the top end of the output shaft passes through the motor housing upward and is sleeved with the planar volute spring, and the bottom end of the output shaft passes through the door frame crossbeam downward and is connected to the shaft connector.

6. The automatic door opening device for a swing door according to claim 5, characterized in that: A thrust bearing is also provided at the top end of the output shaft for limiting the position of the planar scroll spring.

7. The automatic door opening device for a swing door according to claim 5, characterized in that: The spring housing cover is arranged on the outer side of the top end of the output shaft and is fixed on the motor housing by fixing screws.

8. The automatic door opening device for a swing door according to claim 1 or 5, characterized in that: The shaft connecting member is a connecting arm, one end of which is sleeved on the output shaft, and the other end of which is rotatably connected to the top surface of the door leaf.

9. The automatic door opening device for a swing door according to claim 8, characterized in that: A limiting structure is provided between the connecting arm and the output shaft, for limiting the relative rotation and axial movement of the connecting arm and the output shaft.

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