An elevator buffer automatic detection device

Abstract

The application discloses an automatic detection device for an elevator buffer. The buffer is provided with an upward piston rod. The automatic detection device comprises a linear pressing mechanism, a stroke detection assembly and a reset detection assembly. The linear pressing mechanism is detachably connected to one side of the buffer. The linear pressing mechanism comprises an output shaft vertically moving up and down. When the output shaft moves downward, the upper end of the output shaft presses the upper end of the piston rod, and the pressing force is detected by a pressure sensor. The stroke detection assembly is arranged on one side of the buffer and connected to the output shaft to detect the maximum stroke point of the upward and downward movement of the output shaft. The reset detection assembly is arranged on one side of the buffer and connected to the upper end of the piston rod to detect the reset state of the piston rod. The technical scheme of the application avoids the complicated operation of the manual detection mode and helps to improve the detection efficiency.

Description

Technical Field

[0001] This application relates to the field of elevator safety inspection technology, and more specifically to an automatic detection device for elevator buffers. Background Technology

[0002] Elevator buffers are core components of elevator safety protection systems. Whether their compression stroke meets design standards and whether their rebound is timely and smooth directly determines whether the elevator can effectively buffer the impact force and ensure passenger safety when it suddenly bottoms out. Therefore, elevator buffers are generally subject to regular performance testing to ensure their proper function. Currently, elevator buffer performance testing mainly relies on manual operation. Testers must enter the elevator shaft pit and compress the buffer manually by pressing or using counterweights, then manually measure the stroke and record the rebound time. This manual testing method is cumbersome and inefficient. Utility Model Content

[0003] The purpose of this application is to provide an automatic detection device for elevator buffers to improve detection efficiency.

[0004] To achieve the above objectives, this application provides an automatic detection device for an elevator buffer. The buffer is provided with an upward-facing piston rod. The automatic detection device includes a linear pressing mechanism, a stroke detection component, and a reset detection component. The linear pressing mechanism is detachably connected to one side of the buffer and includes an output shaft that moves vertically up and down. During the downward stroke of the output shaft, the upper end of the output shaft presses down on the upper end of the piston rod and the downward pressure is detected by a pressure sensor. The stroke detection component is located on one side of the buffer and is connected to the output shaft to detect the maximum stroke point of the vertical movement of the output shaft. The reset detection component is located on one side of the buffer and is connected to the upper end of the piston rod to detect the reset state of the piston rod.

[0005] The technical solution of this application uses a linear pressing mechanism to automatically press down the piston rod of the buffer for detection. At the same time, the stroke detection component is used to automatically detect whether the upper and lower strokes are in place, and the reset detection component is used to automatically detect whether the piston rod rebounds to place. This avoids the cumbersome operation of manual detection and helps to improve detection efficiency.

[0006] In an optional configuration, the piston rod has an upper bracket at its upper end, and the output shaft is connected to a pressure sensor at its upper end, which is in turn connected to the upper bracket. During the downward stroke of the output shaft, the pressure sensor is clamped between the upper end of the output shaft and the upper bracket.

[0007] In an optional configuration, the linear pressing mechanism is a motor-screw mechanism. Specifically, the linear pressing mechanism also includes a drive motor, with a lead screw as the output shaft, which passes through the drive motor. A lower support is provided on the upper part of the buffer cylindrical housing, and the drive motor is detachably and fixedly connected to the lower support.

[0008] In an optional configuration, the lower bracket is fixedly connected to the drive motor via a permanent magnet.

[0009] In an optional configuration, the stroke detection assembly includes an upper sensor, a lower sensor, and a sensing element. The sensing element is fixed to the lower end of the output shaft, and the upper and lower sensors are located on one side of the buffer, with the upper sensor positioned above the lower sensor. When the sensing element corresponds to the upper sensor and the distance between them is minimal, the output shaft is at its maximum upward stroke point; when the sensing element corresponds to the lower sensor and the distance between them is minimal, the output shaft is at its maximum downward stroke point. Specifically, both the upper and lower sensors are Hall effect proximity switches, and the sensing element is a metal block.

[0010] In an optional configuration, the reset detection assembly includes a reset sensor and a sensing block. The sensing block is located on one side of the buffer. The upper end of the piston rod is connected to the reset sensor via a connecting rod. When the piston rod returns to its initial position, the reset sensor corresponds to the sensing block, and the distance between them is minimized. Specifically, the reset sensor is a Hall effect proximity switch, and the sensing block is a metal block.

[0011] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application, it can be implemented according to the contents of the specification. In order to make the above and other objects, features and advantages of this application more obvious and understandable, some embodiments are listed below for detailed description. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of an automatic detection device for elevator buffers according to at least one embodiment.

[0013] Figure 2 This is a schematic diagram of the electrical component connections of an automatic elevator buffer detection device according to at least one embodiment.

[0014] The products shown in the above views have been appropriately scaled down / enlarged to fit the drawing size and for clarity, and there is no limitation on the size of the products shown in the views. Detailed Implementation

[0015] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are all within the scope of protection of this application.

[0016] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. The illustrative expressions of the above terms in this specification should not be construed as necessarily referring to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0017] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0018] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0019] An automatic detection device for elevator buffers according to one or more embodiments is shown in the schematic diagram below. Figure 1 As shown. The bottom of the buffer 10 is fixed to the bottom of the shaft by several bolts 19. The buffer 10 is provided with an upward-facing piston rod 11 that can move linearly back and forth. When an elevator bottoming-out accident occurs, the car impacts the piston rod 11, and the piston rod 11 retracts into the cylindrical housing 12 of the buffer 10 to absorb the kinetic energy of the car and effectively reduce the impact force. The elevator buffer 10 is usually a hydraulic buffer, and there are more than one buffer 10 to improve the buffering capacity. One or more embodiments of the elevator buffer automatic detection device replace manual detection with automatic detection to improve the detection efficiency of elevator buffers.

[0020] like Figure 1 As shown, the automatic detection device includes a linear pressing mechanism 20, a stroke detection component 30, and a reset detection component 40. The linear pressing mechanism 20 is detachably connected to one side of the buffer 10. The linear pressing mechanism 20 includes an output shaft 21 that moves vertically up and down. During the downward stroke of the output shaft 21, the upper end of the output shaft 21 presses down on the upper end of the piston rod 11, and the downward pressure is detected by a pressure sensor 50. The linear pressing mechanism 20 employs a motor screw mechanism or a linear motor, etc. The linear pressing mechanism 20 is used to push the piston rod 11 of the buffer 10 downward, replacing manual pressing or counterweight impact, which helps to reduce the workload of the detection process.

[0021] like Figure 1 As shown, the stroke detection component 30 is located on one side of the buffer 10. The stroke detection component 30 is connected to the output shaft 21 to detect the maximum stroke point of the output shaft 21's vertical movement. The stroke detection component 30 is used to monitor whether the output shaft 21 is at its highest or lowest point. When the output shaft 21 is at its highest point, the piston rod 11 of the buffer 10 is not pressed down; when the output shaft 21 is at its lowest point, the piston rod 11 of the buffer 10 is pressed down to its lowest position.

[0022] like Figure 1 As shown, the reset detection component 40 is located on one side of the buffer 10. The reset detection component 40 is connected to the upper end of the piston rod 11 to detect the reset state of the piston rod 11. When the output shaft 21 rises, it disengages from the piston rod 11 to avoid the output shaft 21 exerting an upward pulling force on the piston rod 11, which would affect the automatic rebound time of the piston rod 11. Therefore, the compression rebound of the piston rod 11 and the rise of the output shaft 21 are not completely synchronized. The reset detection component 40 needs to monitor whether the piston rod 11 returns to its initial position (not being pressed down).

[0023] One or more embodiments of the automatic detection device use a linear pressing mechanism 20 to automatically press down the piston rod 11 of the buffer 10 for detection. At the same time, the stroke detection component 30 is used to automatically detect whether the up and down strokes are in place, and the reset detection component 40 is used to automatically detect whether the piston rod 11 has rebounded to the correct position. This avoids the cumbersome operation of manual detection and helps to improve detection efficiency.

[0024] The downward pressure on the output shaft 21 is detected in real time by pressure sensor 50 to detect the compression resistance index of the buffer 10. In some embodiments, such as Figure 1As shown, an upper bracket 111 is fixed to the upper end of the piston rod 11 by welding or screws, and a pressure sensor 50 is connected to the upper end of the output shaft 21, and the pressure sensor 50 is connected to the upper bracket 111. During the downward stroke of the output shaft 21, the pressure sensor 50 is clamped by the upper end of the output shaft 21 and the upper bracket 111, so the pressure sensor 50 detects the real-time downward pressure when the output shaft 21 is pressed down. If the detected downward pressure exceeds a specified value, it indicates that the downward resistance of the piston rod 11 of the buffer 10 is too large, and the buffer 10 may not play its due buffering role, requiring repair or replacement. In practice, the pressure sensor 50 is either completely fixed to the upper end of the output shaft 21 or completely fixed to the upper bracket 111. If the pressure sensor 50 is completely fixed to the upper end of the output shaft 21, the pressure sensor 50 moves with the output shaft 21. When the output shaft 21 moves upward, the pressure sensor 50 disengages from the upper bracket 111. If the pressure sensor 50 is completely fixed to the upper bracket 111, the pressure sensor 50 only moves with the upper bracket 111. When the output shaft 21 moves upward, the pressure sensor 50 disengages from the upper end of the output shaft 21.

[0025] In some embodiments, the linear pressing mechanism 20 is a through-type motor lead screw mechanism. Specifically, as shown in the figure... Figure 1 As shown, the linear pressing mechanism 20 also includes a drive motor 22, and the output shaft 21 is a lead screw, which passes through the drive motor 22. The upper part of the cylindrical housing 12 of the buffer 10 is fixed to a lower support 121 by welding or screws, and the drive motor 22 is detachably fixed to the lower support 121. When the drive motor 22 is started, it is relatively fixed, thus driving the output shaft 21 to move up and down. In implementation, the output shaft 21 is a trapezoidal lead screw with self-locking capability to prevent reverse rotation and pressing failure.

[0026] In some embodiments, such as Figure 1As shown, the lower support 121 is fixedly connected to the drive motor 22 via a permanent magnet 60. The lower support 121 is made of iron. Specifically, the permanent magnet 60 is attracted and fixed below the lower support 121, and the output shaft 21 passes through the permanent magnet 60 and the lower support 121. The drive motor 22 is attracted to the lower support 121 by the permanent magnet 60. The fixation of the drive motor 22 by the permanent magnet 60 is detachable. The attraction force of the permanent magnet 60 is greater than the downward pressure of the output shaft 21 on the piston rod 11, allowing the downward pressure to proceed smoothly. At the same time, the attraction force of the permanent magnet 60 is less than the impact force of the elevator car when the elevator bottoms out. The permanent magnet 60 uses a strong magnet, such as a neodymium iron boron magnet. When the elevator suddenly bottoms out, the instantaneous impact force of the car is enormous. When it hits the output shaft 21, it can instantly separate the permanent magnet 60 from the drive motor 22 (or the permanent magnet 60 from the lower support 121), so that the linear pressing mechanism 20 will not obstruct the downward movement of the car, nor will it affect the normal compression and energy absorption buffering function of the buffer 10, thus ensuring elevator safety. Therefore, when the buffer 10 is not being tested, there is no need to disassemble the automatic detection device, improving the convenience of testing.

[0027] The stroke detection component 30 detects whether the up and down strokes have reached their limits using sensors. In some embodiments, such as... Figure 1 As shown, the stroke detection assembly 30 includes an upper sensor 31, a lower sensor 32, and a sensing element 33. The sensing element 33 is fixed to the lower end of the output shaft 21. The upper sensor 31 and the lower sensor 32 are located on one side of the buffer 10, with the upper sensor 31 positioned above the lower sensor 32. When the sensing element 33 corresponds to the upper sensor 31 and the distance between them is minimal, the output shaft 21 is at its maximum upward stroke point. When the sensing element 33 corresponds to the lower sensor 32 and the distance between them is minimal, the output shaft 21 is at its maximum downward stroke point. Specifically, both the upper sensor 31 and the lower sensor 32 are Hall effect proximity switches, and the sensing element 33 is a metal block. During the test, the output shaft 21 is in the initial position, the sensor 33 is at the high point and corresponds to the upper sensor 31, then the drive motor 22 starts, the output shaft 21 moves down to compress the piston rod 11, when the sensor 33 reaches the low point and corresponds to the lower sensor 32, the drive motor 22 stops driving the output shaft 21 to move down, indicating that the piston rod 11 of the buffer 10 has been compressed into place.

[0028] The reset detection component 40 detects whether the piston rod 11 has reset via a sensor. In some embodiments, such as... Figure 1As shown, the reset detection assembly 40 includes a reset sensor 41 and a sensing block 42. The sensing block 42 is located on one side of the buffer 10, and the upper end of the piston rod 11 is connected to the reset sensor 41 via a connecting rod 113. When the piston rod 11 returns to its initial position, the reset sensor 41 corresponds to the sensing block 42, and the distance between them is minimal. Specifically, the reset sensor 41 is a Hall effect proximity switch, and the sensing block 42 is a metal block. During detection, the piston rod 11 is in its initial position, and the sensing block 42 corresponds to the reset sensor 41, indicating that the piston rod 11 is not compressed. When the piston rod 11 is pressed down and then springs back, the sensing block 42 rises to the same height as the reset sensor 41, indicating that the piston rod 11 has returned to its original position (reset).

[0029] The automatic detection apparatus of one or more embodiments further includes a PLC controller 70, such as Figure 2 As shown, the PLC controller 70 is electrically connected to the drive motor 22, pressure sensor 50, upper sensor 31, lower sensor 32, and reset sensor 41. The electrical connections and control technologies are conventional technologies known to those skilled in the art and will not be described in detail here.

[0030] During testing, the PLC controller 70 starts the drive motor 22, and the output shaft 21 presses down the piston rod 11 for compression testing. The pressure sensor 50 detects the pressure value of the pressing stroke, which is received by the PLC controller 70. If the measured pressure value is too high during the process, it indicates that the buffer 10 is abnormal, and the drive motor 22 stops. When the lower sensor 32 detects the sensing element 33, the PLC controller 70 stops the drive motor 22 and stores data such as the pressing stroke distance and pressure value of the piston rod 11. Subsequently, the PLC controller 70 controls the drive motor 22 to reverse and starts timing. When the upper sensor 31 detects the sensing element 33, the drive motor 22 stops (the timing does not stop); the piston rod 11 of the buffer 10 automatically rebounds. When the reset sensor 41 detects the sensing block 42, the timing ends, and the rebound time of the piston rod 11 is detected.

[0031] The automatic detection device of this application has a compact structure and high safety redundancy, which avoids interference with the emergency action of the buffer 10. It has a high degree of automation, which helps to improve detection efficiency and shorten elevator downtime.

[0032] The above examples are merely illustrative of the technical content of this application to facilitate reader understanding, but do not imply that the implementation methods of this application are limited to these. Any technical extensions or re-creations made based on this application are protected by this application. The scope of protection of this application is determined by the claims.

Claims

1. An automatic detection device for elevator buffers, characterized in that, The buffer is provided with an upward-facing piston rod; the automatic detection device includes: A linear pressing mechanism is detachably connected to one side of the buffer. The linear pressing mechanism includes an output shaft that moves vertically up and down. During the downward stroke of the output shaft, the upper end of the output shaft presses down on the upper end of the piston rod and the downward pressure is detected by a pressure sensor. A stroke detection component is disposed on one side of the buffer and is connected to the output shaft to detect the maximum stroke point of the vertical movement of the output shaft. A reset detection component is provided, which is located on one side of the buffer and is connected to the upper end of the piston rod to detect the reset state of the piston rod.

2. The automatic detection device for elevator buffers as described in claim 1, characterized in that, The piston rod is provided with an upper bracket at its upper end, and the pressure sensor is connected to the upper end of the output shaft. The pressure sensor is connected to the upper bracket. During the downward stroke of the output shaft, the pressure sensor is clamped by the upper end of the output shaft and the upper bracket.

3. The automatic detection device for elevator buffers as described in claim 1, characterized in that, The linear pressing mechanism is a motor lead screw mechanism.

4. The automatic detection device for elevator buffers as described in claim 3, characterized in that, The linear pressing mechanism also includes a drive motor, the output shaft is a lead screw, the output shaft passes through the drive motor, the upper part of the buffer cylindrical housing is provided with a lower bracket, and the drive motor is detachably fixedly connected to the lower bracket.

5. The automatic detection device for elevator buffers as described in claim 4, characterized in that, The lower bracket is fixedly connected to the drive motor via a permanent magnet.

6. The automatic detection device for elevator buffers as described in claim 1, characterized in that, The stroke detection assembly includes an upper sensor, a lower sensor, and a sensing element. The sensing element is fixed to the lower end of the output shaft. The upper and lower sensors are located on one side of the buffer, with the upper sensor positioned above the lower sensor. When the sensing element corresponds to the upper sensor and the distance between them is minimal, the output shaft is at its maximum upward stroke point. When the sensing element corresponds to the lower sensor and the distance between them is minimal, the output shaft is at its maximum downward stroke point.

7. The automatic detection device for elevator buffers as described in claim 6, characterized in that, Both the upper and lower sensors are Hall effect proximity switches, and the sensing element is a metal block.

8. The automatic detection device for elevator buffers as described in claim 1, characterized in that, The reset detection assembly includes a reset sensor and a sensing block. The sensing block is located on one side of the buffer. The upper end of the piston rod is connected to the reset sensor via a connecting rod. When the piston rod returns to its initial position, the reset sensor corresponds to the sensing block and the distance between the two is minimized.

9. The automatic detection device for elevator buffers as described in claim 8, characterized in that, The reset sensor is a Hall effect proximity switch, and the sensing block is a metal block.

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