Straight arm door opener capable of being self-locked and manually opened after power failure and door opening and closing method

Abstract

The invention relates to the technical field of automatic door openers, in particular to a straight arm door opener capable of being self-locked and manually opened after power failure and a door opening and closing method. Comprising a power unit, a telescopic unit, a release unit and a control system. The power unit is connected with the telescopic unit through the release unit, the telescopic unit is connected to a door body, and the power unit drives the telescopic unit to stretch out and draw back and further drives the door body to be opened and closed. In a power-off state, the power unit is short-circuited through the control system and maintains the counter-acting force to the telescopic unit; the release unit can disconnect the connection between the power unit and the telescopic unit through external unlocking and a door opening and closing method, so that the problems that unsafety is caused due to the fact that the door body cannot be locked after power failure and manual opening cannot be achieved in emergency are solved; and the self-locking function of the straight-arm door opener in the power-off state and the effect of convenient operation of manual unlocking are achieved.

Description

Technical Field

[0001] The invention relates to the technical field of automatic door openers, and in particular to a straight-arm door opener which can be self-locked and manually opened after power failure, and a door opening and closing method. Background Art

[0002] In the application scenarios of large swing doors, traditional straight-arm door openers face many safety hazards after power supply interruption. These large doors are usually used in warehouses, factories, large shopping malls and other places. Their safety and reliability are crucial to protecting property and personnel safety.

[0003] Conventional straight-arm door openers in the prior art often fail to keep the door locked after a power outage, mainly because many conventional designs rely on electricity to drive the locking mechanism, which fails once the power is off, leaving the door unlocked. In this case, unauthorized personnel can easily break in, posing a serious threat to valuables or equipment stored behind large swing doors.

[0004] In addition, power outages are common in emergency situations, such as fires and earthquakes. For large swing doors, if the door opener lacks a manual unlocking function, users may face the dilemma of not being able to quickly open the door during escape. This not only exacerbates panic, but may also delay precious emergency response time and increase the risk of casualties.

[0005] What is more serious is that even if some traditional door openers have a locking function after power failure, their locking mechanism may not be stable enough and can be easily damaged by external forces. In the application scenario of large swing doors, this safety hazard is particularly fatal, because once the door body is damaged, the consequences will be disastrous. At the same time, the lack of manual unlocking function or the complicated operation also limits the user's self-rescue ability in an emergency. Summary of the invention

[0006] The purpose of the present invention is to provide a straight-arm door opener that can self-lock and manually open after power failure in response to the defects in the prior art, thereby solving the problem that the door body cannot be locked after power failure, resulting in insecurity, and cannot be manually opened in an emergency situation, and realizes the self-locking function of the straight-arm door opener in the power-off state and the convenient operation of manual unlocking.

[0007] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a straight-arm door opener that can self-lock and be manually opened after power failure, comprising a power unit, a telescopic unit, a release unit and a control system; the power unit is connected to the telescopic unit through the release unit, the telescopic unit is connected to the door body, the power unit drives the telescopic unit to extend and retract and further drives the door body to open and close; in the power-off state, the power unit is short-circuited through the control system and maintains a reaction force on the telescopic unit; the release unit can disconnect the connection between the power unit and the telescopic unit by external unlocking.

[0008] Furthermore, the power unit includes a motor and its planetary reducer, and an output shaft, the output shaft is meshed with the telescopic unit, the release unit includes a fixed rod, a sliding plate and an unlocking mechanism, a spring is arranged between the fixed rod and the sliding plate, the motor is fixed on the sliding plate, and after the unlocking mechanism is unlocked, the spring pushes the sliding plate to drive the motor to disengage the output shaft from the telescopic unit.

[0009] Furthermore, the unlocking mechanism is arranged on a fixed plate surface at one end of the release unit, and the unlocking mechanism includes an unlocking knob and an unlocking rotary block. The length of the unlocking rotary block is greater than its width, and the unlocking rotary block is used to make the output shaft of the motor engage with the telescopic unit. After the unlocking knob rotates the direction of the unlocking rotary block, the spring pushes the sliding plate surface to drive the motor to disengage the output shaft from the telescopic unit.

[0010] Furthermore, the telescopic unit includes a ball screw, a thrust bearing and an engaging connecting piece, the output shaft is meshed with the engaging connecting piece and is connected to the ball screw via the thrust bearing, the rotation of the motor drives the ball screw to telescopic movement, and further drives the door body to open and close, the thrust bearing is arranged on the outside of the fixed plate surface at the other end of the release unit, and the engaging connecting piece is arranged on the inside, and the two are connected through the fixed plate surface.

[0011] Furthermore, meshing helical teeth are respectively provided at the meshing positions of the output shaft and the meshing connector.

[0012] Furthermore, an extrusion arc surface is provided at the contact position between the unlocking rotary block surface and the motor.

[0013] Furthermore, a housing is provided, and the motor and its planetary reducer, the output shaft, the ball screw, the thrust bearing, the meshing connector and the release unit are all arranged in the housing.

[0014] Furthermore, the unlocking knob can be driven by a backup power supply to unlock the unlocking knob.

[0015] A door opening and closing method of a straight-arm door opener that can be self-locked and manually opened after power failure, wherein in a normal power-on state, the output shaft is meshed with the meshing connection piece and connected to the ball screw via the thrust bearing, and the motor rotates to drive the ball screw to extend and further push the door body to open; in a normal power-on state, the output shaft is meshed with the meshing connection piece and connected to the ball screw via the thrust bearing, and the motor reacts to drive the ball screw to retract and further pull the door body to close;

[0016] In the power-off state, the output shaft is meshed with the meshing connector and connected to the ball screw via the thrust bearing, the motor is short-circuited and maintains a reaction force on the ball screw, and the door body cannot be opened directly by external force;

[0017] In the power-off state, after the unlocking knob is rotated in the direction of the unlocking knob, the spring pushes the sliding plate to drive the motor to disengage the output shaft from the telescopic unit, the motor loses its reaction force on the ball screw, and the door body can be directly opened by external force.

[0018] The invention comprises a power unit, a telescopic unit, a release unit and a control system; the power unit is connected to the telescopic unit through the release unit, the telescopic unit is connected to the door body, the power unit drives the telescopic unit to extend and retract and further drives the door body to open and close; in a power-off state, the power unit is short-circuited through the control system and maintains a reaction force on the telescopic unit; the release unit can disconnect the connection between the power unit and the telescopic unit through external unlocking and a method for opening and closing the door, thereby solving the problem that the door body cannot be locked after power failure, causing insecurity, and cannot be opened manually in an emergency, and realizing the self-locking function of the straight-arm door opener in a power-off state and the convenient operation of manual unlocking. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a schematic diagram of the interior of a straight arm door opener of the present invention that can be self-locked and manually opened after power failure;

[0021] Figure 2It is a top view of the interior of a straight arm door opener of the present invention that can be self-locked and manually opened after power failure;

[0022] Figure 3 It is a schematic diagram of the unlocking mechanism of the present invention;

[0023] Figure 4 It is an external schematic diagram of a straight arm door opener of the present invention that can be self-locked and manually opened after power failure;

[0024] Reference numerals:

[0025] Power unit 1, motor 1-1, output shaft 1-2, telescopic unit 2, ball screw 2-1, thrust bearing 2-2, meshing connector 2-3, release unit 3, fixed rod 3-1, sliding plate 3-2, unlocking mechanism 3-3, rotary unlocking knob 3-3-1, unlocking knob 3-3-2, spring 3-4, fixed plate 3-5, housing 4. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0027] In the description of the present invention, it should be noted that the orientations or positional relationships indicated by “center”, “up”, “down”, “left”, “right”, “vertical”, “horizontal”, “inside” and “outside”, etc., are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0028] A straight arm door opener that can be self-locked and manually opened after power failure, such as Figures 1 to 3 As shown, it includes a power unit 1, a telescopic unit 2, a release unit 3 and a control system; the power unit 1 is connected to the telescopic unit 2 through the release unit 3, the telescopic unit 2 is connected to the door body, the power unit 1 drives the telescopic unit 2 to extend and retract and further drives the door body to open and close; in the power-off state, the power unit 1 is short-circuited through the control system and maintains a reaction force on the telescopic unit 2; the release unit 3 can disconnect the power unit 1 from the telescopic unit 2 by external unlocking.

[0029] Specifically, by integrating the power unit 1, the telescopic unit 2 and the release unit 3, the entire door opener has a compact structure, occupies a small space, and is easy to install and maintain. The power unit 1 is connected to the telescopic unit 2 through the release unit 3, ensuring the high efficiency and stability of power transmission, making the opening and closing action of the door body more stable and reliable. In the power-off state, the power unit 1 short-circuits and maintains the reaction force on the telescopic unit 2, realizing the self-locking function of the door body, effectively preventing external illegal intrusion and improving safety. The release unit 3 can disconnect the power unit 1 from the telescopic unit 2 by external unlocking, so that in the event of power failure or emergency, the door can be opened manually. The manual unlocking function allows users to unlock the door through simple manual operation in the event of a power outage or emergency, thus improving the practicability and emergency handling capabilities of the equipment. The highly integrated structure makes the entire door opener compact, occupies little space, is easy to install and maintain, and reduces the cost of use.

[0030] As a preferred embodiment of the above, Figures 1 to 3 As shown, the power unit 1 includes a motor 1-1 and its planetary reducer, an output shaft 1-2, the output shaft 1-2 is meshed with the telescopic unit 2, the release unit 3 includes a fixed rod 3-1, a sliding plate 3-2 and an unlocking mechanism 3-3, a spring 3-4 is arranged between the fixed rod 3-1 and the sliding plate 3-2, the motor 1-1 is fixed on the sliding plate 3-2, after the unlocking mechanism 3-3 is unlocked, the spring 3-4 pushes the sliding plate 3-2 to drive the motor 1-1 to disengage the output shaft 1-2 from the telescopic unit 2.

[0031] Specifically, after the motor 1-1 in the power unit 1 is decelerated and torque-increased by the planetary reducer, it is meshed with the telescopic unit 2 through the output shaft 1-2, thereby achieving efficient power transmission and ensuring the smooth opening and closing of the door body. The design of the output shaft 1-2 makes the connection between the power unit 1 and the telescopic unit 2 more compact, which is convenient for the integrated design of the entire door opener. The spring 3-4 in the release unit 3 is arranged between the fixed rod 3-1 and the sliding plate 3-2. When the unlocking mechanism 3-3 is unlocked, the spring 3-4 can automatically push the sliding plate 3-2 and the motor 1-1 to move, so that the output shaft 1-2 is disengaged from the telescopic unit 2, thereby achieving a fast and convenient unlocking operation. The power unit 1, the telescopic unit 2 and the release unit 3 are integrated together, which is not only compact in structure, but also realizes the dual functions of power-off self-locking and manual unlocking.

[0032] As a preferred embodiment of the above, Figures 1 to 3 As shown, the unlocking mechanism 3-3 is arranged on a fixed plate surface 3-5 at one end of the release unit 3, and the unlocking mechanism 3-3 includes an unlocking knob 3-3-1 and an unlocking knob 3-3-2. The length of the unlocking knob 3-3-2 is greater than its width. The unlocking knob 3-3-2 is pressed against the output shaft 1-2 of the motor 1-1 to engage with the telescopic unit 2. After the unlocking knob 3-3-1 rotates the direction of the unlocking knob 3-3-2, the spring 3-4 pushes the sliding plate surface 3-2 to drive the motor 1-1 to disengage the output shaft 1-2 from the telescopic unit 2.

[0033] Specifically, by setting the unlocking mechanism 3-3 on the fixed plate 3-5 of the release unit 3, the user can drive the unlocking knob 3-3-2 by rotating the unlocking knob 3-3-1, thereby realizing the unlocking operation, making the unlocking process simple and quick, and improving the practicability of the equipment. The design of the unlocking knob 3-3-2 takes into account the space utilization rate. Its length is greater than its width, which can not only effectively resist the engagement between the output shaft 1-2 of the motor 1-1 and the telescopic unit 2, but also smoothly release the connection after rotation without taking up too much space. After the unlocking knob 3-3-2 rotates, the spring 3-4 can automatically push the sliding plate 3-2 and the motor 1-1 to move, so that the output shaft 1-2 is disengaged from the telescopic unit 2, which not only ensures the stability of unlocking, but also improves the reliability of the equipment.

[0034] As a preferred embodiment of the above, Figures 1 to 3 As shown, the telescopic unit 2 includes a ball screw 2-1, a thrust bearing 2-2 and an engaging connector 2-3. The output shaft 1-2 is engaged with the engaging connector 2-3 and is connected to the ball screw 2-1 via the thrust bearing 2-2. The rotation of the motor 1-1 drives the ball screw 2-1 to telescope and further drives the door body to open and close. The thrust bearing 2-2 is arranged on the outside of the fixed plate 3-5 at the other end of the release unit 3, and the engaging connector 2-3 is arranged on the inside. The two are connected through the fixed plate 3-5.

[0035] Specifically, the telescopic unit 2 adopts a ball screw 2-1 structure, is connected to the output shaft 1-2 through a thrust bearing 2-2, and is meshed with the output shaft 1-2 through a meshing connector 2-3, which not only ensures efficient power transmission, but also achieves precise control of the opening and closing of the door body, thereby improving the stability and reliability of the equipment. The setting of the thrust bearing 2-2 reduces the friction loss between the output shaft 1-2 and the ball screw 2-1, further improving the transmission accuracy and stability of the equipment. Due to the characteristics of the straight arm door opener, the thrust bearing 2-2 is selected here to further ensure its connection strength. The durability and reliability of the device as a whole are improved. The combination of the telescopic unit 2 and the fixed plate 3-5 of the release unit 3 not only realizes the efficient transmission of power, but also ensures the stability and reliability of the structure. The meshing connector 2-3 and the thrust bearing 2-2 are respectively arranged on the inner and outer sides of the fixed plate 3-5 of the release unit 3. This modular design makes it easier to disassemble and replace each component, reducing the difficulty and cost of maintenance. By adopting high-precision components such as the ball screw 2-1 and the thrust bearing 2-2, the transmission accuracy and load-bearing capacity of the equipment are improved, making the opening and closing of the door body smoother and more reliable.

[0036] As a preferred embodiment of the above, Figures 1 to 3 As shown, the meshing positions of the output shaft 1-2 and the meshing connector 2-3 are each provided with meshing helical teeth.

[0037] Specifically, by setting meshing helical teeth at the meshing position between the output shaft 1-2 and the meshing connector 2-3, the torque can be transmitted more effectively, the power loss can be reduced, and the transmission accuracy and stability can be improved. The design of the helical teeth makes the tooth surface contact more uniform, reduces the wear of the tooth surface, and prolongs the service life of the components. The meshing mode of the helical teeth has better self-locking performance than the straight teeth, and can prevent the meshing loosening caused by vibration or load changes to a certain extent. In addition, the helical teeth have a stronger load-bearing capacity and can better meet the needs of large torque and complex working conditions.

[0038] As a preferred embodiment of the above, Figures 1 to 3 As shown, an extrusion arc surface is provided at the contact position between the surface of the unlocking rotary block 3-3-2 and the motor 1-1.

[0039] Specifically, by setting an extruded arc surface at the contact position between the surface of the unlocking rotary block 3-3-2 and the motor 1-1, the direct contact area between the two can be reduced during the rotational unlocking process, thereby reducing friction and wear, helping to extend the service life of the motor 1-1 and the unlocking rotary block 3-3-2, and improving the durability of the equipment. The design of the extruded arc surface enables the unlocking rotary block 3-3-2 to push the motor 1-1 to move more smoothly when rotating, reducing jamming and resistance, and can also enhance the structural stability between the unlocking rotary block 3-3-2 and the motor 1-1 to a certain extent, prevent loosening or damage caused by vibration or load changes, and help improve the stability and reliability of the entire door opener system.

[0040] As a preferred embodiment of the above, Figure 4 As shown, a housing 4 is also provided, and the motor 1 - 1 and its planetary reducer, the output shaft 1 - 2 , the ball screw 2 - 1 , the thrust bearing 2 - 2 , the meshing connector 2 - 3 and the release unit 3 are all arranged in the housing 4 .

[0041] As a preferred embodiment of the above, Figures 1 to 3 As shown, the unlocking knob 3-3-1 can be driven by a backup power supply to unlock the unlocking knob 3-3-2.

[0042] A door opening and closing method of a straight arm door opener that can be self-locked and manually opened after power failure, in a normal power-on state, the output shaft 1-2 is meshed with the meshing connector 2-3 and connected to the ball screw 2-1 via the thrust bearing 2-2, the motor 1-1 rotates to drive the ball screw 2-1 to extend and further push the door body to open;

[0043] In the normal power-on state, the output shaft 1-2 is meshed with the meshing connector 2-3 and connected to the ball screw 2-1 via the thrust bearing 2-2, and the motor 1-1 drives the ball screw 2-1 to retract and further pull the door body to close;

[0044] In the power-off state, the output shaft 1-2 is meshed with the meshing connector 2-3 and connected to the ball screw 2-1 via the thrust bearing 2-2, the motor 1-1 is short-circuited and maintains a reaction force on the ball screw 2-1, and the door body cannot be opened directly by external force;

[0045] In the power-off state, after the unlocking knob 3-3-1 is rotated in the direction of the unlocking knob 3-3-2, the spring 3-4 pushes the sliding plate 3-2 to drive the motor 1-1 to disengage the output shaft 1-2 from the telescopic unit 2, and the motor 1-1 loses its reaction force on the ball screw 2-1, and the door body can be directly opened by external force.

[0046] Specifically, by innovatively introducing a power-off self-locking mechanism, it ensures that in the event of a power outage, the door body can remain locked to prevent unauthorized access, enhance the safety of the door opener, and provide additional security for key places. In power outages or emergencies, the door body can be manually unlocked by a simple rotation action, which not only improves the flexibility of emergency response, but also ensures that the door body can be easily opened even in the event of a power outage. Under normal power-on conditions, this method achieves smooth and fast opening and closing of the door body through precise power transmission and control mechanisms, which not only improves the operating efficiency of the door opener, but also reduces the risk of failure due to improper operation.

[0047] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A straight arm door opener that can be self-locked and manually opened after power failure, characterized in that: It comprises a power unit (1), a telescopic unit (2), a release unit (3) and a control system; The power unit (1) is connected to the telescopic unit (2) via the release unit (3); the telescopic unit (2) is connected to the door body; the power unit (1) drives the telescopic unit (2) to extend and retract and further drives the door body to open and close; In a power-off state, the power unit (1) is short-circuited through the control system and maintains a reaction force on the telescopic unit (2); The release unit (3) can disconnect the connection between the power unit (1) and the telescopic unit (2) by external unlocking.

2. A straight arm door opener that can be self-locked and manually opened after power failure according to claim 1, characterized in that: The power unit (1) comprises a motor (1-1) and a planetary reducer thereof, and an output shaft (1-2); the output shaft (1-2) is meshed with the telescopic unit (2); the release unit (3) comprises a fixed rod (3-1), a sliding plate (3-2) and an unlocking mechanism (3-3); a spring (3-4) is arranged between the fixed rod (3-1) and the sliding plate (3-2); the motor (1-1) is fixed on the sliding plate (3-2); after the unlocking mechanism (3-3) is unlocked, the spring (3-4) pushes the sliding plate (3-2) to drive the motor (1-1) to disengage the output shaft (1-2) from the telescopic unit (2).

3. A straight arm door opener that can be self-locked and manually opened after power failure according to claim 2, characterized in that: The unlocking mechanism (3-3) is arranged on a fixed plate surface (3-5) at one end of the release unit (3), and the unlocking mechanism (3-3) comprises an unlocking knob (3-3-1) and an unlocking rotary block (3-3-2). The length of the unlocking rotary block (3-3-2) is greater than its width. The unlocking rotary block (3-3-2) is pressed against the output shaft (1-2) of the motor (1-1) so as to engage with the telescopic unit (2). After the unlocking knob (3-3-1) rotates the unlocking rotary block (3-3-2), the spring (3-4) pushes the sliding plate surface (3-2) to drive the motor (1-1) so as to disengage the output shaft (1-2) from the telescopic unit (2).

4. A straight arm door opener capable of self-locking and manual opening after power failure according to claim 3, characterized in that: The telescopic unit (2) comprises a ball screw (2-1), a thrust bearing (2-2) and a meshing connection piece (2-3); the output shaft (1-2) is meshed with the meshing connection piece (2-3) and connected to the ball screw (2-1) via the thrust bearing (2-2); the motor (1-1) rotates to drive the ball screw (2-1) to telescope and further drive the door body to open and close; the thrust bearing (2-2) is arranged on the outside of a fixed plate surface (3-5) at the other end of the release unit (3), and the meshing connection piece (2-3) is arranged on the inside; the two are connected through the fixed plate surface (3-5).

5. A straight arm door opener capable of self-locking and manual opening after power failure according to claim 4, characterized in that: The meshing positions of the output shaft (1-2) and the meshing connection member (2-3) are each provided with meshing helical teeth.

6. A straight arm door opener capable of self-locking and manual opening after power failure according to claim 3, characterized in that: An extrusion arc surface is provided at the contact position between the surface of the unlocking rotary block (3-3-2) and the motor (1-1).

7. A straight arm door opener capable of self-locking and manual opening after power failure according to claim 4, characterized in that: A housing (4) is also provided, and the motor (1-1) and its planetary reducer, the output shaft (1-2), the ball screw (2-1), the thrust bearing (2-2), the meshing connector (2-3) and the release unit (3) are all arranged in the housing (4).

8. A straight arm door opener capable of self-locking and manual opening after power failure according to claim 4, characterized in that: The unlocking knob (3-3-1) can be driven by a backup power supply to unlock the unlocking knob (3-3-2).

9. A method for opening and closing a door of a straight-arm door opener that can be self-locked and manually opened after power failure, used for a straight-arm door opener that can be self-locked and manually opened after power failure as claimed in claim 4, characterized in that: In a normal power-on state, the output shaft (1-2) meshes with the meshing connector (2-3) and is connected to the ball screw (2-1) via the thrust bearing (2-2), and the motor (1-1) rotates to drive the ball screw (2-1) to extend and further push the door body to open; In a normal power-on state, the output shaft (1-2) meshes with the meshing connector (2-3) and is connected to the ball screw (2-1) via the thrust bearing (2-2), and the motor (1-1) drives the ball screw (2-1) to retract and further pulls the door body to close; In a power-off state, the output shaft (1-2) meshes with the meshing connector (2-3) and is connected to the ball screw (2-1) via the thrust bearing (2-2); the motor (1-1) is short-circuited through a control system and maintains a reaction force on the ball screw (2-1); the door body cannot be opened directly by an external force; In the power-off state, after the unlocking knob (3-3-1) is rotated in a certain direction, the spring (3-4) pushes the sliding plate (3-2) to drive the motor (1-1) to disengage the output shaft (1-2) from the telescopic unit (2), and the motor (1-1) loses its reaction force on the ball screw (2-1), so that the door body can be directly opened by external force.

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