Mechanical anti-pinch device for a revolving door and a cabinet

Abstract

This utility model discloses a mechanical anti-pinch device for revolving doors and cabinets, including a speed reducer unit, a rotating shaft, powder alloy friction plates, and a damping limiting plate. One end of the speed reducer unit is equipped with a speed reduction motor, and the other end of the speed reduction motor is equipped with a power output section. The middle of the power output section is connected to a speed reducer output shaft, and the middle of the speed reducer output shaft is connected to a rotating shaft. The upper end of the rotating shaft is connected to a speed reducer power output plate, and the upper end of the speed reducer power output plate is connected to a powder alloy friction plate. The upper end of the powder alloy friction plate is connected to a damping limiting plate. Through this structural design, this device can effectively prevent hands from being pinched while ensuring the normal opening and closing function of the revolving door or cabinet, reducing mechanical impact and structural wear.

Description

Technical Field

[0001] This utility model belongs to the technical field of mechanical anti-pinch devices, specifically relating to a mechanical anti-pinch device for revolving doors and cabinets. Background Technology

[0002] With the widespread application of smart homes and public facilities, revolving doors and cabinets are increasingly used in residences, offices, shopping malls, and industrial equipment. However, during the opening and closing process of revolving doors or cabinets, due to the large inertia of the door or cabinet, they can easily come into contact with people, especially hands, during the closing process, leading to pinching accidents. Furthermore, existing revolving doors or cabinets often rely on simple damping structures or spring devices for deceleration during opening and closing, which has the following shortcomings:

[0003] Traditional damping or buffering devices are difficult to quickly reduce the force when encountering obstruction in the door or cabinet, resulting in unsatisfactory anti-pinch effects and a high risk of hand pinching accidents.

[0004] The existing structure has insufficient control over the rotational inertia of the door or cabinet, making it difficult to stabilize the closing speed of the door, which can easily cause impacts or collisions, affecting the user experience and equipment lifespan.

[0005] Due to friction, impact, and the long-term operation of rotating parts, existing devices are prone to problems such as loose parts, accelerated wear, and decreased adjustment accuracy, resulting in high maintenance and replacement costs.

[0006] Therefore, overcoming the shortcomings of the existing technology is an urgent problem to be solved in this technical field. Utility Model Content

[0007] In view of the technical problems mentioned in the background art, the purpose of this utility model is to provide a mechanical anti-pinch device for revolving doors and cabinets to solve the technical problems mentioned in the background art.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a mechanical anti-pinch device for revolving doors and cabinets, comprising a speed reducer unit, a rotating shaft, powder alloy friction plates, and a damping limiting disc. One end of the speed reducer unit is provided with a speed reducer motor, and one end of the speed reducer motor is provided with a power output section. The middle of the power output section is connected to a speed reducer output shaft, and the middle of the speed reducer output shaft is connected to a rotating shaft. The upper end of the rotating shaft is connected to a speed reducer power output disc, and the upper end of the speed reducer power output disc is connected to a powder alloy friction plate. The upper end of the powder alloy friction plate is connected to a damping limiting disc.

[0009] Furthermore, a limit adjustment fixing component is provided on one side of the damping limit plate, and limit adjustment screws are symmetrically connected to both sides of the limit adjustment fixing component. A limit baffle is provided on the other side of the damping limit plate, and the end of the limit adjustment screw abuts against the limit baffle to achieve precise adjustment of the rotation angle and damping force.

[0010] Furthermore, a limit adjustment fixing component is provided on one side of the damping limit plate, and limit adjustment screws are symmetrically connected to both sides of the limit adjustment fixing component. A limit baffle is provided on the other side of the damping limit plate, and the end of the limit adjustment screw abuts against the limit baffle to achieve precise adjustment of the rotation angle and damping force.

[0011] Furthermore, the upper center of the damping limiting plate is provided with a limiting plate groove. The size of the limiting plate groove is larger than the size of the locking nut and the spring washer. The locking nut and the spring washer are respectively embedded in the limiting plate groove to ensure stable coaxial operation during rotation.

[0012] Furthermore, a synchronization key is installed on the inner side of the damping limit plate. The synchronization key is located between the damping limit plate and the upper end of the rotating shaft to achieve synchronous transmission between the two, ensuring that the direction and angle are consistent during rotation and preventing slippage or deviation.

[0013] Furthermore, the lower end of the rotating shaft is provided with an output shaft, which has a hollow structure and a limiting concave surface on its side.

[0014] Furthermore, the powder alloy friction pad is made of wear-resistant powder alloy material.

[0015] This utility model has the following advantages: It achieves safe and stable opening and closing of a revolving door or cabinet through a combination of a speed reducer, a rotating shaft, powder alloy friction plates, a damping limit plate, and related limiting and adjusting structures. The speed reducer motor drives the output shaft of the speed reducer through the power output unit, and then transmits power through the rotating shaft to rotate the door or cabinet. The powder alloy friction plates generate frictional slippage when encountering resistance, achieving buffer deceleration and anti-pinch protection. The damping limit plate, in conjunction with the synchronization key, locking nut, and spring washer, achieves stable fixing and damping control of the rotating shaft. The limit adjustment fixing parts, limit adjustment screws, and limit stop plates can precisely adjust the rotation angle and damping force. Through the above structural design, this device can effectively prevent hands from being pinched and reduce mechanical impact and structural wear while ensuring the normal opening and closing function of the revolving door or cabinet. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall front structure of this utility model.

[0017] Figure 2 This is a top view diagram of the overall structure of this utility model.

[0018] Reference numerals: 10. Gearbox assembly; 11. Gear motor; 12. Power output unit; 20. Gearbox output shaft; 21. Rotary shaft; 30. Gearbox power output disc; 40. Powder alloy friction plate; 50. Damping limit disc; 60. Limit adjustment fixing part; 61. Limit adjustment screw; 62. Limit stop plate; 211. Nut connection part; 22. Locking nut; 23. Spring washer; 51. Limit disc groove; 52. Synchronization key bar; 212. Output shaft; 213. Limit concave surface. Detailed Implementation

[0019] like Figures 1 to 2 As shown, a mechanical anti-pinch device for revolving doors and cabinets includes a speed reducer assembly 10. One end of the speed reducer assembly 10 is equipped with a speed reducer motor 11, and one end of the speed reducer motor 11 is equipped with a power output section 12. A speed reducer output shaft 20 is connected to the middle of the power output section 12, and a rotating shaft 21 is connected to the middle of the speed reducer output shaft 20. A speed reducer power output disc 30 is connected to the upper end of the speed reducer power output disc 30, and a powder alloy friction plate 40 is connected to the upper end of the powder alloy friction plate 40. A damping limit disc 50 is connected to the upper end of the powder alloy friction plate 40. In use, the speed reducer motor 11 drives the speed reducer output shaft 20 through the power output section 12. The rotating shaft 21 rotates synchronously, enabling the door or cabinet to open and close. When the door or cabinet encounters resistance during closing, the powder alloy friction plate 40 will generate frictional slippage between the reducer power output plate 30 and the damping limit plate 50, weakening the transmission torque of the rotating shaft 21, thereby playing an anti-pinch buffer role and preventing hand pinching accidents. The damping limit plate 50 can provide damping force when the door is close to closing, causing the door to decelerate and close, avoiding collisions caused by inertia. The powder alloy friction plate 40 is made of wear-resistant powder alloy material, with a stable friction coefficient, high temperature resistance, and wear resistance, ensuring stable use for a long time.

[0020] In practical implementation, a limit adjustment fixing part 60 is installed on one side of the damping limit plate 50, and limit adjustment screws 61 are symmetrically connected to both sides of the limit adjustment fixing part 60. A limit baffle 62 is installed on the other side of the damping limit plate 50. The end of the limit adjustment screw 61 abuts against the limit baffle 62. In use, by adjusting the position of the limit adjustment screw 61, the contact angle between the limit baffle 62 and the damping limit plate 50 can be changed, thereby achieving precise control of the rotation angle and damping force. When the revolving door or cabinet is opened or closed, the limit baffle 62, under the action of the limit adjustment screw 61, limits the damping limit plate 50, so that the rotating shaft moves within the set angle range, preventing excessive rotation from causing damage to the mechanism or pinching. The limit adjustment fixing part 60 is fixedly installed by a threaded connection, which is convenient for disassembly and maintenance. It can be finely adjusted according to different door weights and rotation speeds, and has good adaptability and stability.

[0021] In practical implementation, the upper end of the rotating shaft 21 is provided with a nut connection part 211, and a locking nut 22 is threadedly connected to the outer side of the nut connection part 211. A spring washer 23 is provided between the locking nut 22 and the rotating shaft 21. In use, by tightening the locking nut 22, the upper end of the rotating shaft 21 can be reliably fixed to prevent the rotating parts from loosening during long-term operation. The spring washer 23 is located between the locking nut 22 and the rotating shaft 21 and can provide elastic preload when subjected to force, effectively absorbing the vibration and impact generated during rotation, preventing the locking nut 22 from loosening due to vibration, thereby ensuring the stable operation of the rotating structure. At the same time, this structure is easy to disassemble and maintain. When it is necessary to adjust the rotating shaft 21 or replace related parts, it can be done quickly by simply loosening the locking nut 22. The structure is simple, the operation is convenient, and the safety and reliability of the overall device are enhanced.

[0022] In practical implementation, the upper center of the damping limiting disc 50 is recessed with a limiting disc groove 51. The size of the limiting disc groove 51 is larger than the size of the locking nut 22 and the spring washer 23. The locking nut 22 and the spring washer 23 are respectively disposed inside the limiting disc groove 51. In use, the limiting disc groove 51 is used to embed and position the locking nut 22 and the spring washer 23, so that they can be stably installed in the middle position of the damping limiting disc 50, thereby maintaining coaxial operation during rotation. This structural design can effectively prevent displacement or interference between the locking nut 22 and the damping limiting disc 50, ensuring smooth operation of the rotating shaft. At the same time, the setting of the limiting disc groove 51 allows the locking nut 22 and the spring washer 23 to be fully stressed and maintain an elastic pre-tight state during rotation, thereby further improving the anti-loosening effect, avoiding loosening or vibration after long-term use, and ensuring the stability and reliability of the entire anti-pinch device.

[0023] In practical implementation, a synchronization key 52 is installed on the inner side of the damping limiting disc 50. The synchronization key 52 is located between the damping limiting disc 50 and the upper end of the rotating shaft 21. In use, the synchronization key 52 is used to achieve synchronous transmission connection between the damping limiting disc 50 and the rotating shaft 21, so that the two maintain a consistent rotation direction and angle during rotation. When the reducer drives the rotating shaft 21 to rotate, the synchronization key 52 transmits power synchronously to the damping limiting disc 50, thereby ensuring that the damping limiting disc 50 will not slip or deviate during rotation. At the same time, the setting of the synchronization key 52 can also enhance the connection strength between the damping limiting disc 50 and the rotating shaft 21, prevent loosening or wear caused by long-term operation, and improve the overall transmission stability and service life of the device.

[0024] In practical implementation, the lower end of the rotating shaft 21 is provided with an output shaft 212. The output shaft 212 is a hollow output shaft, and a limiting concave surface 213 is recessed on the side of the output shaft 212. In use, the output shaft 212 is used to output the rotational power generated by the reducer to the external transmission mechanism to realize the opening and closing action of the revolving door or cabinet. Since the output shaft 212 is a hollow structure, cables, sensor lines or control axes can be reserved in it to facilitate the arrangement of electrical control and protection structures. When the rotating shaft 21 drives the output shaft 212 to rotate, the limiting concave surface 213 contacts the corresponding limiting mating part, which can limit the rotation angle of the output shaft 212 to prevent excessive rotation from causing interference or damage to the mechanism. In addition, the limiting concave surface 213 can also form a physical stop when rotating to a preset angle, and work with the damping structure to achieve buffer deceleration, thereby improving the safety and stability of the revolving door or cabinet during the opening and closing process.

[0025] In summary, through the combination of the reducer unit 10, rotating shaft 21, powder alloy friction plate 40, damping limit plate 50, and related limiting and adjusting structures, the device achieves safe and stable opening and closing of the revolving door or cabinet. The geared motor 11 drives the reducer output shaft 20 through the power output unit 12, and then transmits power through the rotating shaft 21 to drive the door or cabinet to rotate; the powder alloy friction plate 40 generates frictional slippage when encountering resistance, achieving buffer deceleration and anti-pinch protection; the damping limit plate 50, together with the synchronization key strip 52, locking nut 22, and spring washer 23, achieves stable fixation and damping control of the rotating shaft 21; the limit adjusting fixing part 60, limit adjusting screw 61, and limit stop 62 can precisely adjust the rotation angle and damping force; through the above structural design, this device can effectively prevent hands from being pinched and reduce mechanical impact and structural wear while ensuring the normal opening and closing function of the revolving door or cabinet.

Claims

1. A mechanical anti-pinch device for revolving doors and cabinets, characterized in that, The device includes a speed reducer assembly (10), a rotating shaft (21), a powder alloy friction plate (40), and a damping limiting disc (50). One end of the speed reducer assembly (10) is equipped with a speed reducer motor (11), and one end of the speed reducer motor (11) is equipped with a power output section (12). The middle part of the power output section (12) is connected to a speed reducer output shaft (20), the middle part of the speed reducer output shaft (20) is connected to a rotating shaft (21), the upper end of the rotating shaft (21) is connected to a speed reducer power output disc (30), the upper end of the speed reducer power output disc (30) is connected to a powder alloy friction plate (40), and the upper end of the powder alloy friction plate (40) is connected to a damping limiting disc (50).

2. The mechanical anti-pinch device according to claim 1, characterized in that, The damping limiting plate (50) is provided with a limiting adjustment fixing part (60) on one side, and the limiting adjustment fixing part (60) is symmetrically connected with limiting adjustment screws (61) on both sides. The damping limiting plate (50) is provided with a limiting baffle (62) on the other side, and the end of the limiting adjustment screw (61) abuts against the limiting baffle (62) to achieve precise adjustment of the rotation angle and damping force.

3. The mechanical anti-pinch device according to claim 2, characterized in that, The upper end of the rotating shaft (21) is provided with a nut connection part (211), and the outer side of the nut connection part (211) is threaded to connect a locking nut (22). A spring washer (23) is provided between the locking nut (22) and the rotating shaft (21) to provide elastic preload and ensure stable fixation of the rotating component.

4. The mechanical anti-pinch device according to claim 3, characterized in that, The upper middle part of the damping limiting plate (50) is provided with a limiting plate groove (51). The size of the limiting plate groove (51) is larger than the size of the locking nut (22) and the spring washer (23). The locking nut (22) and the spring washer (23) are respectively embedded in the limiting plate groove (51) to ensure stable coaxial operation during rotation.

5. The mechanical anti-pinch device according to claim 4, characterized in that, The inner side of the damping limit plate (50) is equipped with a synchronization key bar (52). The synchronization key bar (52) is located between the damping limit plate (50) and the upper end of the rotating shaft (21) to realize the synchronous transmission between the two, ensure that the direction and angle are consistent during the rotation, and prevent slippage or deviation.

6. The mechanical anti-pinch device according to claim 5, characterized in that, The lower end of the rotating shaft (21) is provided with an output shaft (212), which is a hollow structure, and the side of the output shaft (212) is provided with a limiting concave surface (213).

7. The mechanical anti-pinch device according to claim 1, characterized in that, The powder alloy friction plate (40) is made of wear-resistant powder alloy material.

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