Elevator door strength testing equipment

Abstract

The present invention relates to the field of special equipment detection, and specifically to an elevator floor door strength detection device, comprising a supporting cylinder and a horizontal cylinder arranged perpendicularly and connected to each other, a negative pressure shell being fixed at both ends of the supporting cylinder, and a plurality of suction cups being arranged on the side walls of the two negative pressure shells away from the supporting cylinder; a driving mechanism and an extrusion mechanism being arranged in the horizontal cylinder; the extrusion mechanism being used to apply force to the elevator floor door; the driving mechanism comprising a slider 2, a screw 1, a bevel gear 1 and a motor; the slider 2 is sleeved on the threaded section of the screw 1, and the side wall of the slider 2 away from the screw 1 is fixedly connected to the extrusion mechanism; the bevel gear 1 is fixedly sleeved on the smooth section of the screw 1, and the output end of the motor is fixedly connected to the end of the screw 1. When the device is performing strength detection, the greater the external force applied, the more stable the entire device is, and no other external strengthening and fixing equipment is required, and the operation is convenient.

Description

Technical Field

[0001] The invention patent relates to the field of special equipment detection technology, specifically, to an elevator floor door strength detection device. Background Art

[0002] With the development of economy, elevators have been widely used in residential areas, office buildings, shopping malls, railway stations and other places, and are inseparable from people's lives. In the safety test of elevators, one of the most important tests is to test the strength of the elevator's landing door. GB7588-2003 "Elevator Manufacturing and Safety Specifications" 7.2.3.1 requires that the landing door and its door lock should have such mechanical strength when locked: that is, a force of 300N is applied vertically to any position on any surface of the landing door, and is evenly distributed within 5cm 2 When the door is placed on a circular or square area, it should be able to: a) have no permanent deformation; b) have elastic deformation no greater than 15mm; c) have no impact on the safety function of the door during and after the test.

[0003] In response to the above requirements, various types of elevator door detection devices have appeared in the prior art. These detection devices are mainly divided into two categories. One is to directly hit the elevator door with an object with a certain impulse, and then observe the deformation of the door; the other is to load a specified static force on the elevator door, and then observe the deformation of the door. For example, the elevator door strength detection device disclosed in the Chinese invention patent (CN107748045A) is connected to the two ends of the telescopic support rod for the convenience of detection. A suction cup is set on the vacuum cavity, the telescopic support rod is fixed by vacuum suction, and then the elevator door is squeezed and tested by the force-applying component. Another example is a kind of elevator door strength detection device disclosed in the Chinese utility model patent (CN206339351U). The device is connected to a suction cup at each end of the detachable connecting rod, and then a hollow tube is installed on the detachable connecting rod. An extrusion device is set in the hollow tube to push the force-bearing pressure block to squeeze the elevator door to achieve detection.

[0004] The two elevator floor door detection devices mentioned above both fix the entire device by a suction cup, and then perform strength testing. During the test, the floor door will also give the detection device a reaction force. When the extrusion force increases, the greater the reaction force, the higher the fixation requirement for the suction cup. In the invention patent (CN107748045A), in order to improve the fixing effect, a vacuum pump is connected to the two vacuum chambers to increase the negative pressure attraction in the vacuum chamber; in the utility model patent (CN206339351U), in order to improve the fixing effect, a T-shaped buckle is set, and the T-shaped buckle is installed on both sides of the floor door, and its purpose is also to enhance the stability of the device during the test process. However, in order to increase the stability of these two devices, both devices need to be connected to an external device, which is inconvenient to carry, and secondly, in actual use, sometimes it is not necessary to apply a particularly large static force, but in order for the experiment to proceed normally, the external device still needs to be connected, which is very inconvenient to operate. Therefore, in response to the above technical problems, the applicant proposed an elevator floor door strength detection device that can directly use thrust to firmly fix the device. Summary of the invention

[0005] The object of the present invention is to provide an elevator floor door strength detection device. When the device performs strength detection, the greater the external force applied, the more stable the entire device is, and other external strengthening and fixing devices are no longer required, and the operation is convenient.

[0006] The present invention is implemented as follows: an elevator floor door strength detection device comprises a supporting cylinder and a horizontal cylinder which are arranged perpendicularly and connected to each other, a negative pressure shell being fixed at both ends of the supporting cylinder, and a plurality of suction cups being arranged on the side walls of the two negative pressure shells away from the supporting cylinder; a driving mechanism and an extrusion mechanism are arranged in the horizontal cylinder; the extrusion mechanism is used to apply force to the elevator floor door; the driving mechanism comprises a slider 2, a screw 1, a bevel gear 1 and a motor; the slider 2 is sleeved on the threaded section of the screw 1, and the side wall of the slider 2 away from the screw 1 is fixedly connected to the extrusion mechanism; the bevel gear 1 is fixedly sleeved on the smooth section of the screw 1, and the output end of the motor is fixedly connected to the end of the screw 1; two negative pressure mechanisms are symmetrically arranged in the supporting cylinder with the driving mechanism as the center;

[0007] The negative pressure mechanism includes bevel gear 2, screw 2, slider 1, spring 1, pull rod and piston; the piston is located in the negative pressure housing and the side wall is in sealing contact with the inner wall of the negative pressure housing; the two ends of the pull rod are respectively fixedly connected to the piston and the end of spring 1; the end of spring 1 away from the pull rod is fixedly connected to slider 1, and the slider is sleeved on the threaded section of screw 2; the end of screw 2 is fixedly connected to bevel gear 2, and bevel gear 1 is meshed with bevel gear 2.

[0008] Furthermore, the extrusion mechanism includes a pressure plate, a force sensor and a pressure block; the force sensor is installed in the pressure plate, and the sensing end of the force sensor is connected to the pressure block.

[0009] Furthermore, a support bearing is fixedly provided in the horizontal cylinder, and the support bearing is sleeved on the smooth section of the screw rod 1; and a distance sensor is installed on the side wall of the slider 2 close to the support bearing.

[0010] Furthermore, the extrusion mechanism includes a second spring, a pressure plate, a force-bearing block, two force sensors and a limit unit; the two ends of the second spring are respectively fixedly connected to the second slider and the pressure plate, the two force sensors are respectively installed in the two side walls of the pressure plate, and the sensing ends of the two force sensors are respectively fixedly connected to the force-bearing block and the second spring; the limit unit is used to limit the position of the pressure plate.

[0011] Furthermore, the limiting unit includes an annular shell, an inner gear ring, a second servo motor, a power gear and multiple sets of telescopic contact units; the annular shell is fixedly sleeved on the outer wall of the horizontal cylinder, and the outer wall of the inner gear ring is attached to the inner wall of the outer ring of the annular shell and is slidably connected; the output end of the second servo motor is fixedly connected to the axis of the power gear, and the power gear is meshed with the inner gear ring; multiple sets of telescopic contact units are simultaneously meshed with the inner gear ring.

[0012] Furthermore, the telescopic contact unit includes a driven gear, a rack and a limit rod; the driven gear is meshed with the rack and the inner gear ring at the same time, and a limit rod is fixedly provided at the end of the rack near the horizontal cylinder. Under normal conditions, the limit rod is partially located in the horizontal cylinder and contacts the pressure plate, and the limit rod and the rack both pass through the side wall of the horizontal cylinder and are in sliding contact with the horizontal cylinder.

[0013] Furthermore, the negative pressure shell includes a fixed cylinder, a sliding cylinder and a limiting telescopic unit; the sliding cylinder is inserted into the fixed cylinder, the outer wall of the sliding cylinder is in sealing contact with the inner wall of the fixed cylinder, and the inner wall of the sliding cylinder is flush with the inner wall of the fixed cylinder; a plurality of suction cups are fixedly installed on the top of the sliding cylinder and are connected to the interior of the entire negative pressure shell; the limiting telescopic unit is used to adjust the position of the sliding cylinder and realize the adjustment of the length of the entire negative pressure shell.

[0014] Furthermore, the limiting telescopic unit includes a connecting block, a servo motor and a threaded rod; the connecting block is fixedly installed on the outer wall of the sliding cylinder, the servo motor is fixedly installed on the outer wall of the fixed cylinder, the output end of the servo motor is fixedly connected to the end of the threaded rod, and the connecting block is sleeved on the threaded section of the threaded rod.

[0015] Furthermore, the limiting telescopic unit includes a limiting block and a fixing bolt, the limiting block is fixedly mounted on the outer wall of the sliding cylinder, the fixing bolt passes through the side wall of the fixed cylinder and is threadedly connected thereto, and the fixing bolt can be rotated to make its end contact with the outer wall of the sliding cylinder.

[0016] Furthermore, the sliding cylinder is a cylindrical cylinder, and the plurality of suction cups are located on the same circumference with the sliding cylinder as the center and are distributed with equal arc lengths.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. A piston is arranged in the negative pressure housing, a bevel gear 1 on the screw 1 is meshed with a bevel gear 2, the bevel gear 2 is connected to the screw 2, the slider 1 and the slider 2 are respectively sleeved on the screw 1 and the screw 2, and the pull rod connected to the piston is connected to the slider 1 through a spring 1, and the slider 2 is fixedly connected to the extrusion mechanism, so that the motor drives the screw 1 to rotate, so that the extrusion mechanism applies an external force to the elevator landing door and the pull rod pulls the piston, so that a negative pressure is formed in the suction cup, so that the suction cup of the entire negative pressure housing can be tightly adsorbed on the wall surface; in addition, with this structure, the greater the external force applied to the landing door, the greater the negative pressure strength in the negative pressure housing, and the more stable the entire detection equipment will be;

[0019] 2. The negative pressure shell is configured to consist of a sliding cylinder and a fixed cylinder. The outer wall of the sliding cylinder is in sliding contact with the inner wall of the fixed cylinder. A limiting unit is fixedly installed on the outer walls of the fixed cylinder and the sliding cylinder. In this way, the telescopic lengths of the two negative pressure shells can be adjusted separately by the limiting unit, thereby realizing strength detection of different positions of the landing door. In addition, with this structure, no matter how the length of the negative pressure shell is adjusted, the effect of negative pressure suction will not be affected;

[0020] 3. Spring 2 is arranged between slider 2 and the pressure plate, and the pressure plate is limited by setting a limit unit. Thus, the extrusion amount of spring 2 can be adjusted by rotating screw 1 to adjust the position of slider 2, so that the pressure block can be ejected with different elastic forces, thereby achieving different impact forces on the elevator door.

[0021] 4. An annular shell is sleeved on the outer wall of the horizontal cylinder, and an inner gear ring is arranged on the outer ring side wall of the annular shell. The inner gear ring is meshed with multiple driven gears at the same time, and the driven gears are meshed with the rack. At the same time, the power gear connected to the servo motor 2 is also meshed with the inner gear ring. In this way, when the elastic force of the spring 2 reaches the specified compression amount, the servo motor 2 drives the power gear to make all the limit rods contact with the pressure plate and move toward the inside of the annular shell. In this way, the stressed pressure block can be ejected with a specified elastic force, so as to achieve the effect of applying a specified impact force to the elevator floor door. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of an elevator door strength detection device provided by Embodiment 1 of the present invention;

[0023] Figure 2 yes Figure 1 The enlarged view of point A in the middle;

[0024] Figure 3 is a schematic structural diagram of a negative pressure housing provided in Example 1 of the present invention;

[0025] Figure 4 is a schematic diagram of a control system of a detection device provided in Example 1 of the present invention;

[0026] Figure 5 is a top view of the sliding cylinder provided in Example 1 of the present invention;

[0027] Figure 6 is a schematic structural diagram of a negative pressure housing provided in Example 2 of the present invention;

[0028] Figure 7 3 is a schematic diagram of the structure of an elevator door strength detection device provided by Embodiment 3 of the present invention;

[0029] Figure 8 yes Figure 7 The enlarged view of point A in the middle;

[0030] Fig. 9 yes Figure 8 Cross-section at the middle BB;

[0031] Fig.10 It is a schematic diagram of the control system of the detection equipment provided in Example 3 of the present invention.

[0032] Reference numerals in the above drawings:

[0033] 1. Support cylinder; 2. Horizontal cylinder; 3. Screw rod 1; 4. Pressure plate; 5. Pressure block; 6. Slider 2; 7. Distance sensor; 8. Support bearing; 9. Slider 1; 10. Spring 1; 11. Pull rod; 12. Piston; 13. Suction cup; 14. Screw rod 2; 15. Torque motor; 16. Bevel gear 2; 17. Bevel gear 1; 18. Sliding cylinder; 19. Threaded rod; 20. Connecting block; 21. Servo motor 1; 22. Fixed cylinder; 23. Limit rod; 24. Fixed bolt; 25. Spring 2; 26. Inner gear ring; 27. Limit rod; 28. Annular housing; 29. ​​Rack; 30. Power gear; 31. Driven gear. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0035] The implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0036] The same or similar numbers in the drawings of this embodiment correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, it is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limitations on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0037] Reference Figure 1-10 The figure shows a preferred embodiment of the present invention.

[0038] Embodiment 1: An elevator door strength detection device, comprising a support cylinder 1 and a horizontal cylinder 2, such as Figure 1 As shown, one end of the horizontal cylinder 2 is fixedly connected to the middle position of the supporting cylinder 1, and the inside is connected, and the whole is T-shaped; a negative pressure shell is fixed at both ends of the supporting cylinder 1, and the two negative pressure shells are provided with multiple suction cups 13 on the side walls away from the supporting cylinder 1. The negative pressure shell provides negative pressure inside, so that the suction cup 13 can be tightly adsorbed on the wall surface; for the stability of the equipment when in use, as Figure 5 As shown, the negative pressure housing is a cylindrical housing as a whole, and a plurality of suction cups 13 are distributed on the same circumference with the sliding cylinder 18 as the center. A driving mechanism and an extrusion mechanism are installed in the horizontal cylinder 2. In this embodiment, the extrusion mechanism is used to apply static force to the elevator door. The specific structure is as follows Figure 1 As shown, it includes a pressure plate 4, a force sensor and a pressure block 5; the force sensor is installed in the pressure plate 4, and the sensing end of the force sensor is fixedly connected to the pressure block 5. When the pressure block 5 is subjected to pressure, the reaction force of the floor door will be transmitted to the force sensor, thereby realizing the application of a static force of a specified size to the elevator floor door.

[0039] In this embodiment, Figure 1 and Figure 2As shown, the driving mechanism includes a slider 26, a screw 3, a bevel gear 17 and a torque motor 15; the screw 3 is horizontally installed in the horizontal cylinder 2, the torque motor 15 is fixedly installed on the outer wall of the support cylinder, one end of the screw 3 passes through the side wall of the support cylinder and is fixedly connected to the output end of the torque motor 15, the other end of the screw 3 is a threaded section, and the slider 26 is sleeved on the end of the threaded section of the screw 3; the slider 26 is fixedly connected to the pressure plate 4 of the extrusion mechanism away from the side wall of the screw 3; in this way, when the torque motor 15 drives the screw 3 to rotate, the slider 26, the pressure plate 4 and the pressure block 5 can be moved, thereby applying static force to the elevator door; it should be noted that in the production process, if the rotational friction between the screw 3 and the slider 26 is large, in order to ensure that the slider 26 can move stably in the horizontal direction, the cross section of the pressure plate 4 can also be set to a polygon; in addition, a limit strip can be installed on the inner wall of the horizontal cylinder 2, so that the slider 26 can also be limited.

[0040] In this embodiment, in order to ensure the stability of the screw rod 3, a support bearing 8 is also sleeved on the smooth section of the screw rod 3, and a distance sensor 7 is fixedly installed on the side wall of the slider 2 6 close to the support bearing 8. In this way, if a specified static force is applied to the elevator floor door to cause deformation, the slider 2 6 will be displaced. The distance sensor 7 can obtain the deformation amount of the elevator floor door by sensing the change in the distance from the side wall of the slider 2 6 to the support bearing 8.

[0041] In this embodiment, a bevel gear 17 is fixedly sleeved on the smooth section of the screw 1 3, and a negative pressure mechanism is installed on both sides of the bevel gear 17. The negative pressure mechanism includes a bevel gear 16, a screw 14, a slider 9, a spring 10, a pull rod 11 and a piston 12; Figure 1 As shown, the piston 12 is located in the negative pressure housing and the side wall is in sealed contact with the inner wall of the negative pressure housing; the two ends of the pull rod 11 are fixedly connected to the piston 12 and the end of the spring 10 respectively; the end of the spring 10 away from the pull rod 11 is fixedly connected to the slider 19, the end of the threaded rod 19 is a threaded section, and the slider 19 is sleeved on the end of the threaded section of the screw rod 14; the other end of the screw rod 14 is fixedly connected to the bevel gear 16, and the bevel gear 17 is meshed with the bevel gear 16; in this embodiment, for the stability of the screw rod 14, as shown in Figure 2As shown, a support bearing 8 is also installed in the support cylinder, and the support bearing 8 is sleeved on the smooth section of the screw rod 2 14; in this embodiment, the elastic coefficient of the spring 10 is relatively large and the k value is relatively large. When the negative pressure has not been generated inside the negative pressure shell or the negative pressure attraction is relatively small, the screw rod 3 rotates to push the slider 2 6 and the pressure block 5 to move forward. At this time, the spring 10 will drive the pull rod 11 and the piston 12 to move toward the horizontal cylinder 2; when the negative pressure attraction intensity inside the horizontal cylinder 2 is relatively large, the piston 12 can no longer be pulled. At this time, the entire detection equipment is firmly fixed. At this time, the pressure block 5 is in contact with the elevator floor door. If the elevator floor door is deformed, the slider 2 6 will continue to move forward. At this time, since the piston 12 cannot move, the slider 9 will stretch the spring 10, and the spring 10 will apply a pulling force to the pull rod 11 and the piston 12, thereby further enhancing the fixing effect of the detection equipment.

[0042] In this embodiment, the negative pressure housing includes a fixed cylinder 22, a sliding cylinder 18 and a limiting telescopic unit; Figure 3 As shown, the sliding cylinder 18 is inserted into the fixed cylinder 22, the outer wall of the sliding cylinder 18 is in sealing contact with the inner wall of the fixed cylinder 22, and the inner wall of the sliding cylinder 18 is flush with the inner wall of the fixed cylinder 22, so that the piston 12 can move normally along the negative pressure shell; a plurality of suction cups 13 are fixedly installed on the top of the sliding cylinder 18 and are connected to the interior of the entire negative pressure shell; the limiting telescopic unit is used to adjust the position of the sliding cylinder 18 and realize the adjustment of the length of the entire negative pressure shell.

[0043] In this embodiment, the specific structure of the limiting telescopic unit is as follows: Figure 3 As shown, it includes a connecting block 20, a servo motor 21 and a threaded rod 19; the connecting block 20 is fixedly mounted on the outer wall of the sliding cylinder 18, the servo motor 21 is fixedly mounted on the outer wall of the fixed cylinder 22, the output end of the servo motor 21 is fixedly connected to the end of the threaded rod 19, and the connecting block 20 is sleeved on the threaded section of the threaded rod 19. In order to ensure more stability during movement, this embodiment also installs a limit rod 23 on the fixed cylinder 22, and another connecting block 20 is slidably sleeved on the limit rod 23.

[0044] In this embodiment, in order to control various electrical components, a control panel and a central processing unit are also provided to realize automatic operation.

[0045] Working principle: When using the device, place it on one side of the elevator door, leave a distance between the pressure block 5 and the elevator door, and the upper and lower suction cups 13 are adsorbed on the wall. The staff only needs to input a static force value on the control panel; at this time, the central processor controls the torque motor 15 to rotate, and the torque motor 15 drives the screw 13 to rotate. At the same time, due to the action of the bevel gear 17 and the bevel gear 2 16, the screw 2 14 will be driven to rotate. Since the slider 1 9 is sleeved on the screw 1 3, the slider 1 9 moves toward The horizontal cylinder 2 moves in the direction of the cylinder body 2, which will drive the spring 10, the pull rod 11 and the piston 12 to move synchronously; when the negative pressure attraction in the negative pressure shell reaches a certain strength, the suction cup 13 is tightly attached to the wall, and the piston 12 cannot move; at this time, the screw 3 continues to rotate, and the slider 9 will stretch the spring 10. At this time, under the tension of the spring 10, the piston 12 always has a certain tendency to move. The greater the stretching amount of the spring 10, the greater the stretching force of the piston 12, the greater the strength of the negative pressure attraction, and the better the fixing effect. When the pressure block 5 contacts the elevator floor door, the force sensor senses the change in pressure value, and the distance sensor 7 automatically records the distance between the support bearing 8 at this time. If the pressure value reaches the specified pressure, the central processing unit stops the torque motor 15 from rotating, and the distance sensor 7 will immediately transmit the distance value at this time to the central processing unit. The central processing unit will subtract the two distance values ​​to obtain the deformation value. Thereby judging whether the strength of the elevator floor door meets the requirements. The control system of this embodiment is as follows Figure 4 If deformation occurs, the spring 10 will continue to be stretched, making the negative pressure attraction in the negative pressure housing stronger. In this way, the applied thrust is fully utilized to make the detection device more stable, so that no external fixing device is required to maintain the stability of the detection device.

[0046] Embodiment 2: An elevator door strength detection device. The difference between this embodiment and embodiment 1 is that the specific structure of the limit telescopic unit is different. Figure 6 As shown, the position-limiting telescopic unit includes a position-limiting block and a fixing bolt 24. The position-limiting block is fixedly mounted on the outer wall of the sliding cylinder 18. The fixing bolt 24 passes through the side wall of the fixing cylinder 22 and is threadedly connected thereto. By rotating the fixing bolt 24, the end of the fixing bolt 24 can be brought into contact with the outer wall of the sliding cylinder 18. When adjusting the position of the applied force, the staff only needs to move the position-limiting block to move the sliding cylinder 18 to the specified position, and then rotate the fixing bolt 24 to fix it. This method has a simple structure and is easy to operate, and reduces the production cost compared to the method of Example 1.

[0047] Embodiment 3: An elevator door strength detection device. The difference between this embodiment and embodiment 1 is that the structure of the extrusion mechanism is different. Figure 7 and Figure 8As shown, the extrusion mechanism includes a spring 25, a pressure plate 4, a pressure block 5, two force sensors and a limit unit; the two ends of the spring 25 are fixedly connected to the slider 26 and the pressure plate 4, respectively, and the two force sensors are installed in the two side walls of the pressure plate 4, respectively, and the sensing ends of the two force sensors are fixedly connected to the pressure block 5 and the spring 25, respectively, so that the elastic force of the spring 25 and the pressure of the pressure block 5 can be detected in real time; in this embodiment, the pressure block 5 is located in the horizontal cylinder 2, and there is a certain distance between it and the end of the horizontal cylinder 2; the limit unit is used to limit the position of the pressure plate 4. The extrusion mechanism of this embodiment can be used to apply a specified impact force to the elevator floor door. When the screw 1 3 rotates, the spring 25 will continue to be squeezed. When it is squeezed to the specified position, the limit unit releases the pressure plate 4. At this time, the pressure plate 4 and the pressure block 5 are ejected under the elastic force of the spring 25, and directly hit the elevator floor door. During product production, the material of the horizontal cylinder 2 is first selected to determine the friction coefficient, and repeated tests are performed to determine the impact force when the force-bearing pressure block 5 is ejected to the end of the horizontal cylinder 2 corresponding to different compression amounts of the spring 25.

[0048] In this embodiment, Fig. 9 As shown, the limiting unit includes an annular shell 28, an inner gear ring 26, a servo motor 2 (not shown in the figure), a power gear 30 and 6 groups of telescopic contact units; the annular shell 28 is fixedly sleeved on the outer wall of the horizontal cylinder 2, and the outer wall of the inner gear ring 26 is attached to the inner wall of the outer ring of the annular shell 28 and is slidably connected; the output end of the servo motor 2 is fixedly connected to the axis of the power gear 30, and the power gear 30 is meshed with the inner gear ring 26; the 6 groups of telescopic contact units are meshed with the inner gear ring 26 at the same time.

[0049] In this embodiment, the telescopic contact unit includes a driven gear 31, a rack 29 and a limit rod 27; the driven gear 31 is meshed with the rack 29 and the inner gear ring 26 at the same time, and the limit rod 27 is fixedly provided at the end of the rack 29 close to the horizontal cylinder 2. Under normal conditions, the limit rod 27 is partially located in the horizontal cylinder 2 and contacts the pressure plate 4 to achieve the limiting effect. The limit rod 27 and the rack 29 both pass through the side wall of the horizontal cylinder 2 and slide in contact with the horizontal cylinder 2. With this structure, only the servo motor 2 is needed to drive the power gear 30 to rotate, the power gear 30 drives the inner gear ring 26 to rotate, and the inner gear ring 26 drives multiple driven gears 31 to rotate at the same time. Since the rack 29 is meshed with the driven gear 31, all the limit rods 27 can be simultaneously retracted into the annular shell 28 to release the pressure plate 4.

[0050] Working principle: When using the detection device of this embodiment, it is necessary to make the front end of the horizontal cylinder 2 contact with the elevator door, and then input the specified impact force on the control panel, the torque motor 15 will drive the slider 2 6 to move, and squeeze the spring 25, so that the spring 25 is compressed to the position corresponding to the specified compression amount, and then the central processing unit controls the servo motor 2 to rotate, so that the limit rod 27 shrinks into the annular shell 28. At this time, the pressure plate 4 is ejected forward by the elastic force of the spring 25, so that the pressure block 5 hits the elevator door. The entire automatic control system is as follows: Fig.10 After use, the screw rod 1 3 rotates in the opposite direction, and the slider 2 6 moves in the opposite direction with the spring 2 25, the pressure plate 4 and the pressure block 5, so that the pressure plate 4 moves to the left side of the limit rod 27, and the servo motor 2 rotates again to extend the limit rod 27, so as to limit the pressure plate 4.

[0051] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An elevator door strength detection device, characterized in that: It comprises a supporting cylinder (1) and a horizontal cylinder (2) which are arranged perpendicularly and in communication with each other, a negative pressure shell being fixed at both ends of the supporting cylinder (1), and a plurality of suction cups (13) being provided on the side walls of the two negative pressure shells away from the supporting cylinder (1); a driving mechanism and an extrusion mechanism are provided in the horizontal cylinder (2); the extrusion mechanism is used to apply force to the elevator door; the driving mechanism comprises a slider 2 (6), a screw rod 1 (3), a bevel gear 1 (17) and a motor; the slider 2 (6) is sleeved on the threaded section of the screw rod 1 (3), and the side wall of the slider 2 (6) away from the screw rod 1 (3) is fixedly connected to the extrusion mechanism; the bevel gear 1 (17) is fixedly sleeved on the smooth section of the screw rod 1 (3), and the output end of the motor is fixedly connected to the end of the screw rod 1 (3); two negative pressure mechanisms are symmetrically provided in the supporting cylinder (1) with the driving mechanism as the center; The negative pressure mechanism comprises a bevel gear 2 (16), a screw 2 (14), a slider 1 (9), a spring 1 (10), a pull rod (11) and a piston (12); the piston (12) is located in the negative pressure housing and the side wall is in sealing contact with the inner wall of the negative pressure housing; the two ends of the pull rod (11) are respectively fixedly connected to the piston (12) and the end of the spring 1 (10); the end of the spring 1 (10) away from the pull rod (11) is fixedly connected to the slider 1 (9), and the slider 1 (9) is sleeved on the threaded section of the screw 2 (14); the end of the screw 2 (14) is fixedly connected to the bevel gear 2 (16), and the bevel gear 1 (17) is meshed with the bevel gear 2 (16).

2. The elevator door strength detection device according to claim 1, characterized in that: The extrusion mechanism comprises a pressure plate (4), a force sensor and a pressure block (5); the force sensor is installed in the pressure plate (4), and the sensing end of the force sensor is connected to the pressure block (5).

3. The elevator door strength detection device according to claim 2, characterized in that: A support bearing (8) is fixedly provided inside the horizontal cylinder (2), and the support bearing (8) is sleeved on the smooth section of the screw rod 1 (3); a distance sensor (7) is installed on the side wall of the slider 2 (6) close to the support bearing (8).

4. The elevator door strength detection device according to claim 1, characterized in that: The extrusion mechanism comprises a second spring (25), a pressure plate (4), a pressure block (5), two force sensors and a limit unit; the two ends of the second spring (25) are respectively fixedly connected to the second slider (6) and the pressure plate (4); the two force sensors are respectively installed in the two side walls of the pressure plate (4); the sensing ends of the two force sensors are respectively fixedly connected to the pressure block (5) and the second spring (25); the limit unit is used to limit the position of the pressure plate (4).

5. The elevator door strength detection device according to claim 4, characterized in that: The limiting unit comprises an annular shell (28), an inner gear ring (26), a second servo motor, a power gear (30) and a plurality of telescopic contact units; the annular shell (28) is fixedly sleeved on the outer wall of the horizontal cylinder (2), the outer wall of the inner gear ring (26) is fitted on the inner wall of the outer ring of the annular shell (28) and is slidably connected; the output end of the second servo motor is fixedly connected to the axis of the power gear (30), and the power gear (30) is meshed with the inner gear ring (26); and the plurality of telescopic contact units are simultaneously meshed with the inner gear ring (26).

6. The elevator door strength detection device according to claim 5, characterized in that: The telescopic contact unit comprises a driven gear (31), a rack (29) and a limit rod (27); the driven gear (31) is meshed with the rack (29) and the inner gear ring (26) at the same time; a limit rod (27) is fixedly provided at the end of the rack (29) close to the horizontal cylinder (2); under normal conditions, part of the limit rod (27) is located inside the horizontal cylinder (2) and is in contact with the pressure plate (4); the limit rod (27) and the rack (29) both pass through the side wall of the horizontal cylinder (2) and are in sliding contact with the horizontal cylinder (2).

7. The elevator door strength detection device according to claim 1, characterized in that: The negative pressure shell comprises a fixed cylinder (22), a sliding cylinder (18) and a limiting telescopic unit; the sliding cylinder (18) is inserted into the fixed cylinder (22), the outer wall of the sliding cylinder (18) is in sealing contact with the inner wall of the fixed cylinder (22), and the inner wall of the sliding cylinder (18) is flush with the inner wall of the fixed cylinder (22); a plurality of suction cups (13) are fixedly mounted on the top of the sliding cylinder (18) and are connected to the interior of the entire negative pressure shell; the limiting telescopic unit is used to adjust the position of the sliding cylinder (18) and to adjust the length of the entire negative pressure shell.

8. The elevator door strength detection device according to claim 7, characterized in that: The position-limiting telescopic unit comprises a connecting block (20), a servo motor (21) and a threaded rod (19); the connecting block (20) is fixedly mounted on the outer wall of the sliding cylinder (18), the servo motor (21) is fixedly mounted on the outer wall of the fixed cylinder (22), the output end of the servo motor (21) is fixedly connected to the end of the threaded rod (19), and the connecting block (20) is sleeved on the threaded section of the threaded rod (19).

9. The elevator door strength detection device according to claim 7, characterized in that: The limit telescopic unit comprises a limit block and a fixing bolt (24); the limit block is fixedly mounted on the outer wall of the sliding cylinder (18); the fixing bolt (24) passes through the side wall of the fixing cylinder (22) and is threadedly connected thereto; the end of the fixing bolt (24) can be brought into contact with the outer wall of the sliding cylinder (18) by rotating it.

10. The elevator door strength detection device according to claim 7, characterized in that: The sliding cylinder (18) is a cylindrical cylinder, and the plurality of suction cups (13) are located on the same circumference with the sliding cylinder (18) as the center and are distributed with equal arc lengths.

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