An open-close door device based on one-way bearing

Abstract

The utility model relates to building door body technical field discloses a kind of opening and closing door device based on one-way bearing, including door closer, direction conversion device and power shell, the direction conversion device and power shell are connected by screw, first coupling is equipped between the door closer and direction conversion device, rotating rod is rotatably connected in the direction conversion device;The utility model is configured between " motor and direction conversion device " or " door closer and direction conversion device " by the design of one-way bearing, can solve the pain point of traditional automatic door, cut off the linkage of motor and door closer when closing door or motor shutdown, so that motor no longer restricts door closer, and then make door closer can rely on self closing force work completely, and retain conventional door closer " two-stage or more speed regulation " function, both realize fast opening, and can guarantee closing safety, avoid the problem that door closer function fails or action is jammed in traditional device.

Description

Technical Field

[0001] This utility model relates to the field of building door technology, and in particular to an opening and closing door device based on a one-way bearing. Background Technology

[0002] In the field of building door control, door closers, as core hardware components that ensure automatic door closing and improve passage safety, have been widely used in various scenarios such as residences, office buildings, hospitals, and shopping malls. With the increasing demand for building intelligence, in order to achieve automated opening and closing of doors, the industry often adopts a solution of adding a motor with a reducer to the existing door closer. This solution is suitable for mainstream door types such as single doors, double doors, and sliding doors.

[0003] The existing door closers for double doors are equipped with a motor with a reducer via a coupling and a direction conversion device. If the torque output by the motor is greater than the sum of the closing torque of the door closer and the torque required to open the door, the door will open, thus achieving an automatic opening and closing function. However, after the motor stops, the internal cogging torque will be directly converted into the load resistance of the closing force of the door closer, causing the door closer to be unable to complete the closing action by its own force, resulting in a safety hazard of "door jamming and inability to open and close normally". Based on this, a door opening and closing device based on a one-way bearing is proposed for improvement. Utility Model Content

[0004] In view of the problem that when the motor of the existing device stops, the internal cogging torque of the device is directly converted into the load resistance of the closing force of the door closer, which makes it impossible for the door closer to complete the closing action by its own power, this utility model is proposed.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a door opening and closing device based on a one-way bearing, comprising a door closer, a direction changing device, and a power housing, wherein the direction changing device and the power housing are connected by screws, a first coupling is provided between the door closer and the direction changing device, a rotating rod is rotatably connected inside the direction changing device, the door closer is connected to the rotating rod through the first coupling, a first partition plate, a second partition plate, and a third partition plate are sequentially provided at one end of the inner wall of the direction changing device, an open position switch is provided between the first partition plate and the second partition plate, and a related position switch is also provided between the first partition plate and the second partition plate;

[0006] A motor is fixedly installed inside the power housing. A one-way bearing is provided on one side of the motor output shaft. The one-way bearing is located between the first partition plate and the second partition plate. The one-way bearing can also be located between the door closer and the direction changing device. A second coupling is provided on one side of the one-way bearing. A ball screw is provided on one side of the second coupling. A movable sleeve is threaded onto the surface of the ball screw. A U-shaped movable plate is installed on one side of the movable sleeve by screws. The U-shaped movable plate is slidably connected to the other end of the inner wall of the direction changing device.

[0007] As a preferred embodiment, a gear is fixedly sleeved on the surface of the rotating rod inside the direction changing device, and a rack is installed on the top of the U-shaped moving plate by screws, wherein the surface of the gear meshes with the protruding teeth at the bottom end of the rack.

[0008] As a preferred embodiment, the U-shaped movable plate is symmetrically provided with transmission rods on one side, one end of the transmission rods is slidably connected to the inside of the second partition plate and the third partition plate, and the other end of the transmission rods is also slidably connected to the inside of the first partition plate.

[0009] As a preferred embodiment, both of the transmission rods have annular grooves on their surfaces, and the annular grooves on the two transmission rods are staggered.

[0010] As a preferred embodiment, the surface of one side of the transmission rod is in contact with the top switch of the open position switch, and the top switch of the closed position switch is disposed inside the annular groove on the surface of the other side of the transmission rod, and does not contact the inner wall of the annular groove.

[0011] As a preferred embodiment, the rotating rod is disposed between the U-shaped moving plate and the rack, and the bottom wall of the U-shaped moving plate has a rectangular through groove.

[0012] Compared with the prior art, the present invention has at least the following beneficial effects:

[0013] 1. This utility model, through the design of a one-way bearing, can solve the pain points of traditional automatic doors, whether it is configured between the motor and the direction conversion device or between the door closer and the direction conversion device. When the door is closed or the motor stops, the linkage between the motor and the door closer is cut off, so that the motor no longer constrains the door closer. This allows the door closer to work entirely by its own closing force, while retaining the conventional door closer's "two or more speed adjustment" function. This achieves both fast opening and ensures door closing safety, avoiding the problems of door closer malfunction or jamming in traditional devices.

[0014] 2. This utility model maintains a good operating experience in both electric and manual scenarios: In electric mode, the double doors achieve automatic opening and closing through a transmission chain of "motor-one-way bearing-ball screw-rack and pinion-door closer", while the sliding doors achieve automatic opening and closing through a traction chain of "motor-one-way bearing-winding device-rope-door closer", which can stably output power without human intervention. On the other hand, when the motor stops, the one-way bearing is not locked in the opening direction, and the manual pushing of the door does not need to overcome the motor's tooth torque or internal resistance. The operating feel is consistent with that of traditional manual doors, avoiding the drawbacks of traditional electric doors such as "high manual pushing and pulling force and operation jamming", while meeting the needs of daily manual adjustment and quick opening and closing in case of emergencies.

[0015] 3. This utility model addresses the emergency scenario of power outages. The device ensures that the door closer does not fail through the logic of "unlocking the backup battery-driven motor": In the case of double doors, the battery-driven motor rotates in the opposite direction of the one-way bearing lock, and the speed exceeds the door closer's reset speed. The one-way bearing unlocks, disengaging the motor from the door closer, allowing the door closer to open and close normally. In the case of sliding doors, the battery-driven motor rotates in the opposite direction of the one-way bearing lock, the winding device remains in a free state, and the door closer works normally by relying on its own closing force. This solves the safety hazard of traditional electric doors "getting stuck and unable to open or close after a power outage," and is suitable for places with strict requirements for the normal opening and closing of doors, ensuring personnel passage and environmental safety.

[0016] 4. This utility model breaks through the limitation of single door body adaptation, and can flexibly adapt to both open and sliding doors. It is also compatible with multiple drive structures. It is not only compatible with the traditional automatic structure of sliding doors with "rope and reel device", but also compatible with innovative drive methods such as "synchronous belt and pulley" and "ball screw". It solves the industry pain point that the tooth groove torque hinders the operation of the door closer after the motor of the traditional sliding door stops, and is extremely practical. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a top view cross-sectional structural diagram of the present invention;

[0019] Figure 3 This is a top-view, disassembled structural diagram of the direction-changing device and the power housing in this utility model;

[0020] Figure 4 for Figure 3 Enlarged structural diagram at point A;

[0021] Figure 5 This is a partially enlarged structural schematic diagram of the present invention.

[0022] Explanation of reference numerals in the attached figures:

[0023] 1. Door closer; 2. Direction changing device; 21. First partition plate; 22. Second partition plate; 23. Third partition plate; 3. Power housing; 4. First coupling; 5. Rotating rod; 51. Gear; 6. Motor; 7. One-way bearing; 8. Second coupling; 9. Ball screw; 10. Moving sleeve; 11. U-shaped moving plate; 12. Rack; 13. Transmission rod; 14. Annular groove; 15. Open position switch; 16. Closed position switch. Detailed Implementation

[0024] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0025] Reference Figures 1-5 This is the first embodiment of the present invention, which provides a door opening and closing device based on a one-way bearing, including a door closer 1, a direction changing device 2, and a power housing 3. The direction changing device 2 and the power housing 3 are connected by screws. A first coupling 4 is provided between the door closer 1 and the direction changing device 2. A rotating rod 5 is rotatably connected inside the direction changing device 2. The door closer 1 is connected to the rotating rod 5 through the first coupling 4. A first partition plate 21, a second partition plate 22, and a third partition plate 23 are sequentially provided on one end of the inner wall of the direction changing device 2. An open position switch 15 is provided between the first partition plate 21 and the second partition plate 22. A related position switch 16 is also provided between the first partition plate 21 and the second partition plate 22.

[0026] A motor 6 is fixedly installed inside the power housing 3. A one-way bearing 7 is provided on one side of the output shaft of the motor 6. The one-way bearing 7 is located between the first partition plate 21 and the second partition plate 22. The one-way bearing 7 can also be located between the door closer 1 and the direction changing device 2. A second coupling 8 is provided on one side of the one-way bearing 7. A ball screw 9 is provided on one side of the second coupling 8. A movable sleeve 10 is threaded on the surface of the ball screw 9. A U-shaped movable plate 11 is installed on one side of the movable sleeve 10 by screws. The U-shaped movable plate 11 is slidably connected to the other end of the inner wall of the direction changing device 2.

[0027] A gear 51 is fixedly sleeved on the surface of the rotating rod 5 inside the direction changing device 2. A rack 12 is installed on the top of the U-shaped moving plate 11 by screws. The surface of the gear 51 meshes with the protruding teeth at the bottom end of the rack 12.

[0028] Specifically, when the door type is a double door, the motor 6 is started, and the rotation direction of its output shaft is the same as the locking direction of the one-way bearing 7 and the opening direction. The power of the output shaft of the motor 6 is transmitted to the one-way bearing 7 and the second coupling 8 in sequence, and finally drives the ball screw 9 to rotate synchronously. When the ball screw 9 rotates, it drives the moving sleeve 10 to move linearly along the axial direction. At the same time as the moving sleeve 10 moves, it drives the U-shaped moving plate 11 to move. The rack 12 moves synchronously with the U-shaped moving plate 11.

[0029] Since the bottom teeth of the rack 12 mesh with the gear 51, the gear 51 and the rotating rod 5 rotate synchronously. One end of the rotating rod 5 transmits the rotational power to the door closer 1 through the first coupling 4. When the output torque of the motor 6 is greater than the sum of the closing torque of the door closer 1 and the torque required to open the door, the door closer 1 drives the door to rotate and open.

[0030] When the double door is closed, the output shaft of motor 6 rotates along the unlocking direction of one-way bearing 7, and the speed of motor 6 is greater than the return speed of door closer 1. At this time, one-way bearing 7 is unlocked, and motor 6 is disengaged from door closer 1. Since conventional door closer 1 has two or more speed adjustment functions, it can achieve fast and safe closing action. Therefore, door closer 1 can achieve fast and safe closing action by relying on its own closing force.

[0031] When the motor 6 stops running, the one-way bearing 7 does not have a locking function only in the opening direction of the door closer 1. When the door is pushed manually, there is no need to overcome the cogging torque or internal resistance of the motor 6. The door closer 1 can be directly driven to open freely, and the operation feel is the same as that of a traditional manual door.

[0032] When the power is off, the battery is used to make the output shaft of motor 6 rotate continuously in the opposite direction of the locking of one-way bearing 7 at a speed faster than the reset speed of door closer 1, so that the system of motor 6 and door closer 1 will be disengaged. Therefore, even in the power outage state, door closer 1 can still perform normal opening and closing operations.

[0033] When the door type is a sliding door, the existing sliding door closer 1 achieves automatic opening and closing function by adding a rope and a winding device. When the output force of the motor 6 is greater than the sum of the closing force of the door closer 1 and the force required to open the door, the door will open. However, if the output of the motor 6 drops to zero, the cogging torque of the motor 6 will become the load resistance of the closing force of the door closer 1, causing the door closer 1 to fail to work properly. To solve this problem, a one-way bearing 7 is set in the winding device so that it is locked only in the opening rotation direction. When the door needs to be opened, the motor 6 rotates in the locking direction of the one-way bearing 7, and the winding device will wind up the rope, and the door closer 1 will pull the door open. When the door needs to be closed, the door closer 1 makes the winding device rotate at a speed higher than its reset speed in the opposite direction locked by the one-way bearing 7. The winding device will be in a free state, and the door closer 1 can close the door leaf by its own closing force.

[0034] Even if the motor 6 stops working, the door can still be opened freely by hand because the one-way bearing 7 is not locked in the opening direction. When there is a power outage, the motor 6 is continuously rotated in the opposite direction of the locking of the one-way bearing 7 at a speed higher than the reset speed of the door closer 1 by battery power. The winding device will remain in a free state, ensuring that the door closer 1 can still open and close normally when there is a power outage. This also applies to sliding door closers 1 that use other drive methods such as synchronous belts with pulleys or ball screws.

[0035] Reference Figures 1-5 This is the second embodiment of the present utility model. The difference between this embodiment and the first embodiment is that: a transmission rod 13 is symmetrically provided on one side of the U-shaped moving plate 11. One end of the transmission rod 13 is slidably connected to the inside of the second partition plate 22 and the third partition plate 23, and another end of the transmission rod 13 is also slidably connected to the inside of the first partition plate 21.

[0036] Both transmission rods 13 have annular grooves 14 on their surfaces, and the annular grooves 14 on the surfaces of the two transmission rods 13 are staggered.

[0037] One side of the transmission rod 13 is in contact with the top switch of the open position switch 15, and the top switch of the closed position switch 16 is located inside the annular groove 14 on the surface of the other side of the transmission rod 13, and does not contact the inner wall of the annular groove 14.

[0038] Specifically, one end of the transmission rod 13 slides simultaneously inside the first partition plate 21, the second partition plate 22, and the third partition plate 23, forming a multi-layer guide structure. This effectively limits the radial offset of the transmission rod 13, avoids distortion of the position detection signal due to movement and shaking, and ensures the accuracy of subsequent switch position judgment. The annular grooves 14 on the surfaces of both transmission rods 13 are designed with staggered positioning to distinguish between the "door open" and "door closed" signals.

[0039] Reference Figures 1-5 This is the third embodiment of the present invention. The difference between this embodiment and the second embodiment is that the rotating rod 5 is disposed between the U-shaped moving plate 11 and the rack 12, and the bottom wall of the U-shaped moving plate 11 is provided with a rectangular through groove.

[0040] During use, the rotating rod 5 is positioned between the U-shaped moving plate 11 and the rack 12. This central arrangement reduces radial offset during transmission, prevents misalignment when the rack 12 meshes with the gear 51, and ensures the stability of power transmission.

[0041] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A door opening and closing device based on a one-way bearing, comprising a door closer (1), a direction changing device (2), and a power housing (3), characterized in that: The direction changing device (2) and the power housing (3) are connected by screws. A first coupling (4) is provided between the door closer (1) and the direction changing device (2). A rotating rod (5) is rotatably connected inside the direction changing device (2). The door closer (1) is connected to the rotating rod (5) through the first coupling (4). A first partition plate (21), a second partition plate (22) and a third partition plate (23) are provided sequentially on one end of the inner wall of the direction changing device (2). An open position switch (15) is provided between the first partition plate (21) and the second partition plate (22). A related position switch (16) is also provided between the first partition plate (21) and the second partition plate (22). The motor (6) is fixedly installed inside the power housing (3). A one-way bearing (7) is provided on one side of the output shaft of the motor (6). The one-way bearing (7) is located between the first partition plate (21) and the second partition plate (22). The one-way bearing (7) can also be located between the door closer (1) and the direction changing device (2). A second coupling (8) is provided on one side of the one-way bearing (7). A ball screw (9) is provided on one side of the second coupling (8). A movable sleeve (10) is threaded on the surface of the ball screw (9). A U-shaped movable plate (11) is installed on one side of the movable sleeve (10) by screws. The U-shaped movable plate (11) is slidably connected to the other end of the inner wall of the direction changing device (2).

2. The door opening and closing device based on a one-way bearing according to claim 1, characterized in that: The rotating rod (5) is fixedly fitted with a gear (51) inside the direction changing device (2). The top of the U-shaped moving plate (11) is fitted with a rack (12) by screws. The surface of the gear (51) meshes with the protruding teeth at the bottom end of the rack (12).

3. The door opening and closing device based on a one-way bearing according to claim 1, characterized in that: The U-shaped moving plate (11) is symmetrically provided with transmission rods (13) on one side. One end of the transmission rod (13) is slidably connected to the inside of the second partition plate (22) and the third partition plate (23), and the other end of the transmission rod (13) is also slidably connected to the inside of the first partition plate (21).

4. The door opening and closing device based on a one-way bearing according to claim 3, characterized in that: Both of the transmission rods (13) have annular grooves (14) on their surfaces, and the annular grooves (14) on the surfaces of the two transmission rods (13) are staggered.

5. The door opening and closing device based on a one-way bearing according to claim 4, characterized in that: The surface of the transmission rod (13) on one side is in contact with the top switch of the open position switch (15), and the top switch of the closed position switch (16) is located inside the annular groove (14) on the surface of the transmission rod (13) on the other side, and does not contact the inner wall of the annular groove (14).

6. The door opening and closing device based on a one-way bearing according to claim 2, characterized in that: The rotating rod (5) is positioned between the U-shaped moving plate (11) and the rack (12), and the bottom wall of the U-shaped moving plate (11) has a rectangular through groove.

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