Anti-pinch device for elevator

Abstract

The anti-pinch device for the elevator comprises a lift car, a telescopic elevator door and a servo motor, the top of the front side of the lift car is in threaded connection with a driving screw rod, the servo motor is arranged on the top face of the lift car, the output end of the servo motor is connected with the driving screw rod, and the output end of the servo motor is connected with the telescopic elevator door. The extension elevator door is in sliding connection with the front side of the lift car, and the right side of the extension elevator door is in sliding connection with a clamping plate; according to the anti-pinch device for the elevator, a servo motor drives a driving screw to rotate, the driving screw drives a first linkage plate to move, a telescopic elevator door moves along with the first linkage plate, and when a clamping plate on the telescopic elevator door makes contact with a foreign object, the clamping plate drives a second linkage plate to get close to the first linkage plate; and a sensor on a first linkage plate senses a second linkage plate and enables a servo motor to drive a driving screw rod to rotate reversely, and the first linkage plate drives an extension ladder door to move reversely, so that the situation that hands are clamped due to the fact that the extension ladder door and a clamping plate continue to move is avoided.

Description

Technical Field

[0001] This utility model relates to the field of elevator equipment technology, and in particular to an anti-pinch device for elevators. Background Technology

[0002] An elevator is a power-driven electromechanical device that uses a car running along rigid guide rails or steps running along a fixed route to lift or transport people or goods horizontally. It includes passenger (freight) elevators, escalators, and moving walkways. Elevator doors are controlled by an integrated control system that controls the door opening motor, converting the torque generated by the motor into a force in a specific direction to close or open the elevator door. Existing elevators are equipped with anti-pinch devices, such as the elevator door anti-pinch device disclosed in authorization announcement number CN218231474U, which includes a left door, a right door movably connected to the side of the left door, flexible inserts movably connected to the internal sealing edges of the left and right doors, two flexible inserts movably connected to each other on their sides, and a buffer device on the other side of the flexible inserts. The buffer device includes a sliding plate, one end of which is fixedly connected to the side of the flexible insert, and the other end of the sliding plate... The slide is fixedly connected to a buffer spring. The end of the buffer spring away from the slide is fixedly connected to the inner wall of the left door, and the other end of the slide is fixedly connected to the buffer spring. The end of the buffer spring away from the slide is fixedly connected to the inner wall of the left door. Two rotating balls are movably connected to the upper and lower surfaces of the slide. A long rod is fixedly connected to the end of the rotating ball away from the slide. The slide is a cuboid with a spherical groove on the top, the rotating ball is a sphere, the long rod is a cylinder, and the cylinder is an annulus. The outer surface of the rotating ball is in frictional contact with the inner wall of the spherical groove of the slide. The bottom of the long rod is fixedly connected to the upper surface of the rotating ball, and the top of the long rod is located inside the cylinder. However, in actual use, although the flexible insert plays a buffering role, the left and right doors do not open in time and continue to move and close, which still poses a risk of pinching hands. Therefore, a new elevator door structure needs to be designed to solve the above problems. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model provides a servo motor driving a drive screw to rotate in an elevator anti-pinch device. The drive screw drives a first linkage plate to move, and the telescopic door moves with the first linkage plate. When the clamp on the telescopic door comes into contact with an external object, the clamp will cause the clamp to drive a second linkage plate to approach the first linkage plate. The sensor on the first linkage plate senses the second linkage plate and causes the servo motor to drive the drive screw to rotate in the opposite direction. The first linkage plate drives the telescopic door to move in the opposite direction, so as to prevent the telescopic door and the clamp from continuing to move and causing a hand to be pinched.

[0004] An anti-pinch device for elevators includes a car, a telescopic door, and a servo motor. A drive screw is threadedly connected to the top front side of the car. The servo motor is disposed on the top surface of the car, and its output end is connected to the drive screw. The telescopic door is slidably connected to the front side of the car. A clamping plate is slidably connected to the right side of the telescopic door. The top surface of the telescopic door is threadedly connected to the drive screw via a first linkage plate, and the top surface of the clamping plate is threadedly connected to the drive screw via a second linkage plate. A sensor for sensing the second linkage plate is disposed on the side of the first linkage plate facing the second linkage plate.

[0005] Preferably, the top surface of the car is provided with a mounting base, one end of the drive screw is rotatably connected to the mounting base, and the other end of the drive screw is connected to the output end of the servo motor.

[0006] Preferably, the right side of the telescopic ladder door is provided with a receiving cavity, and the left side of the receiving cavity is connected to the clamping plate through multiple compression springs.

[0007] Preferably, a sliding groove is provided on the left side of the accommodating cavity corresponding to the positions of the multiple compression springs, a guide rod is slidably connected in the sliding groove, and the guide rod is connected to the clamping plate so that the compression spring is sleeved on the guide rod.

[0008] Preferably, a through groove is provided on the front side of the top of the car, and a receiving groove communicating with the through groove is provided on the right side inside the car, and the first linkage plate and the second linkage plate are both slidably connected to the through groove.

[0009] Preferably, the second linkage plate is provided with an opening for the drive screw to pass through, and an annular permanent magnet is provided on the side of the second linkage plate facing the first linkage plate.

[0010] The beneficial effects of this utility model are as follows: The anti-pinch device for elevators works in conjunction with the car, telescopic door, and servo motor. The servo motor drives the drive screw to rotate, and the drive screw drives the first linkage plate to move. The telescopic door moves with the first linkage plate. When the clamp on the telescopic door comes into contact with an external object, the clamp will cause the clamp to drive the second linkage plate to approach the first linkage plate. The sensor on the first linkage plate detects the second linkage plate and causes the servo motor to drive the drive screw to rotate in the opposite direction. The first linkage plate drives the telescopic door to move in the opposite direction, so as to prevent the telescopic door and the clamp from continuing to move and causing a hand to be pinched. Attached Figure Description

[0011] Appendix Figure 1 This is a front view of the present utility model;

[0012] Appendix Figure 2 This is a schematic diagram of the structure of this utility model;

[0013] Appendix Figure 3 This is a schematic diagram of the first linkage seat structure in this utility model;

[0014] Appendix Figure 4 This is a schematic diagram of the second linkage seat structure in this utility model.

[0015] In the diagram: 1. Car, 2. Telescopic door, 3. Servo motor, 4. Drive screw, 5. Clamping plate, 6. First linkage plate, 7. Second linkage plate, 8. Sensor, 9. Receiving cavity, 10. Compression spring, 11. Slide groove, 12. Guide rod, 13. Through groove, 14. Receiving groove, 15. Opening, 16. Ring permanent magnet. Detailed Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so as to provide a clearer understanding of the technical concept claimed by the present invention.

[0017] like Figures 1 to 4 As shown, an anti-pinch device for elevators includes a car 1, a telescopic door 2, and a servo motor 3. A drive screw 4 is threadedly connected to the top front side of the car 1. The servo motor 3 is disposed on the top surface of the car 1, and its output end is connected to the drive screw 4. The telescopic door 2 is slidably connected to the front side of the car 1. A clamping plate 5 is slidably connected to the right side of the telescopic door 2. The top surface of the telescopic door 2 is threadedly connected to the drive screw 4 through a first linkage plate 6, and the top surface of the clamping plate 5 is threadedly connected to the drive screw 4 through a second linkage plate 7. A sensor 8 for sensing the second linkage plate 7 is disposed on the side of the first linkage plate 6 facing the second linkage plate 7.

[0018] The working principle of the elevator anti-pinch device described in this utility model is achieved through the cooperation of the car 1, the telescopic door 2, and the servo motor 3. Figures 1 to 4As shown, the servo motor 3 and sensor 8 can be connected to the elevator controller (not shown in the figure). The servo motor 3 drives the drive screw 4 to rotate, and the drive screw 4 drives the first linkage plate 6 to move. The telescopic door 2 moves with the first linkage plate 6. When the clamping plate 5 on the telescopic door 2 comes into contact with a person, it will cause the clamping plate 5 to drive the second linkage plate 7 to move closer to the first linkage plate 6. The sensor 8 on the first linkage plate 6 senses the second linkage plate 7 and generates a sensing signal to the elevator controller, which controls the servo motor 3 to drive the drive screw 4 to rotate in the opposite direction. The first linkage plate 6 drives the telescopic door 2 to move in the opposite direction, thereby separating the clamping plate 5 from the person. It should be noted that after the first linkage plate 6 and the second linkage plate 7 separate, the sensing signal of the sensor 8 disappears. The staff can preset a certain delay time and then control the servo motor 3 to drive the drive screw 4 to rotate again to avoid affecting people entering and exiting the car 1. Compared with traditional elevators, this elevator uses an anti-pinch device that can cause the telescopic door 2 to move in response when the clamping plate 5 comes into contact with a person, so as to prevent the telescopic door 2 and the clamping plate 5 from continuing to move and causing a hand to be pinched.

[0019] Specifically, the top surface of the car 1 is provided with a mounting base. One end of the drive screw 4 is rotatably connected to the mounting base, and the other end of the drive screw 4 is connected to the output end of the servo motor 3. A receiving cavity 9 is provided on the right side of the telescopic door 2, and the left side of the receiving cavity 9 is connected to the clamping plate 5 via multiple compression springs 10. A sliding groove 11 is provided on the left side of the receiving cavity 9 corresponding to the positions of the multiple compression springs 10. A guide rod 12 is slidably connected within the sliding groove 11, and the guide rod 12 is connected to the clamping plate 5, with the compression springs 10 fitted onto the guide rod 12. Figures 1 to 4 As shown, the first linkage plate 6 can be provided with a threaded hole and threadedly connected to the drive screw 4. The servo motor 3 drives the drive screw 4 to rotate on the mounting base. The first linkage plate 6 moves along the drive screw 4. The telescopic door 2 moves with the first linkage plate 6 and drives the second linkage plate 7 to move along the drive screw 4 through the clamping plate 5. When the clamping plate 5 comes into contact with the human body, it will compress the compression spring 10 and be stored in the accommodating cavity 9. The guide rod 12 on the clamping plate 5 moves along the slide groove 11 of the accommodating cavity 9 and has a guiding function. After the clamping plate 5 is separated from the human body, it will be pushed out of the accommodating cavity 9 and reset by the action of the compression spring 10.

[0020] Furthermore, a through groove 13 is provided on the front side of the top of the car 1, and a receiving groove 14 communicating with the through groove 13 is provided on the right side inside the car 1. The first linkage plate 6 and the second linkage plate 7 are both slidably connected to the through groove 13. Further still, the second linkage plate 7 is provided with an opening 15 for the drive screw 4 to pass through, and an annular permanent magnet 16 is provided on the side of the second linkage plate 7 facing the first linkage plate 6. Figures 1 to 4As shown, the drive screw 4 drives the first linkage plate 6 to move along the through groove 13. The annular permanent magnet 16 is arranged around the opening 15. The opening 15 of the second linkage plate 7 can avoid interference with the drive screw 4. When the telescopic door 2 closes the car 1, the clamping plate 5 can be accommodated in the receiving groove 14. The sensor 8 of the first linkage plate 6 can be arranged above and below the drive screw 4. The sensor 8 on the first linkage plate 6 can be a magnetic sensor so that when the second linkage plate 7 approaches the first linkage plate 6, the sensor 8 interacts with the annular permanent magnet 16 on the second linkage plate 7 to generate a sensing signal, so as to avoid the clamping plate 5 from being accidentally touched.

[0021] The above are merely specific embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. An anti-pinch device for elevators, characterized in that: The system includes a car, a telescopic door, and a servo motor. A drive screw is threadedly connected to the top front side of the car. The servo motor is located on the top surface of the car, and its output end is connected to the drive screw. The telescopic door is slidably connected to the front side of the car. A clamping plate is slidably connected to the right side of the telescopic door. The top surface of the telescopic door is threadedly connected to the drive screw via a first linkage plate, and the top surface of the clamping plate is threadedly connected to the drive screw via a second linkage plate. A sensor for sensing the second linkage plate is provided on the side of the first linkage plate facing the second linkage plate.

2. The anti-pinch device for elevators according to claim 1, characterized in that: The car is provided with a mounting base on its top surface. One end of the drive screw is rotatably connected to the mounting base, and the other end of the drive screw is connected to the output end of the servo motor.

3. The anti-pinch device for elevators according to claim 2, characterized in that: The right side of the telescopic ladder door is provided with a receiving cavity, and the left side of the receiving cavity is connected to the clamping plate through multiple compression springs.

4. The anti-pinch device for elevators according to claim 3, characterized in that: A sliding groove is provided on the left side of the accommodating cavity corresponding to the positions of the multiple compression springs. A guide rod is slidably connected in the sliding groove, and the guide rod is connected to the clamping plate so that the compression spring is sleeved on the guide rod.

5. The anti-pinch device for elevators according to claim 4, characterized in that: A through groove is provided on the front side of the top of the car, and a receiving groove communicating with the through groove is provided on the right side of the car. The first linkage plate and the second linkage plate are both slidably connected to the through groove.

6. The anti-pinch device for elevators according to claim 5, characterized in that: The second linkage plate is provided with an opening for the drive screw to pass through, and an annular permanent magnet is provided on the side of the second linkage plate facing the first linkage plate.

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