Elevator operation position detection device

Abstract

The application relates to an elevator running position detection device for detecting the running position of an elevator car in a shaft, which comprises a measuring rack arranged in the shaft, the measuring rack being arranged to extend along the vertical direction of the shaft, a measuring gear arranged to rotate on the elevator car, wherein the measuring gear is engaged with the measuring rack, and a rotary encoder arranged on the elevator car, wherein the rotary shaft of the rotary encoder is fixedly connected with the measuring gear coaxially. The elevator running position detection device can realize the detection of the running position of the elevator by engaging the measuring rack with the measuring gear and converting the rotary motion of the measuring gear into a digital signal through the rotary encoder.

Description

Technical Field

[0001] This application relates to the field of elevator inspection, and in particular to an elevator operating position detection device. Background Technology

[0002] Elevators are an indispensable vertical transportation device in modern buildings. With the development of elevator detection and control technology, the accurate detection of elevator operating position plays a vital role in ensuring elevator safety and improving operating efficiency.

[0003] Existing technologies for detecting elevator position generally fall into two categories. One method uses a magnetic scale, which includes a magnetic scale, a reading head, a signal processing unit, and an output interface. This method works by laying a magnetic scale made of permanent magnet material along the elevator guide rails, creating a periodic N / S pole alternating magnetic field. When the reading head, fixed to the car, moves relative to the magnetic poles, its internal Wiegand sensor detects the magnetic pole boundaries, generating counting pulses. Simultaneously, an induction coil generates orthogonal sine or cosine analog signals. The signal processing unit then performs ADC (analog-to-digital converter) conversion, arctangent calculation, and 2048x interpolation subdivision on the analog signals. Combined with the magnetic pole count, the absolute displacement is calculated. Finally, the 24-bit position data is fed back to the elevator control system in real time via an SSI (Synchronous Serial Interface) or CANopen (CAN bus-based open communication protocol) interface, achieving high-precision, contamination-resistant position monitoring. This method offers the advantage of high accuracy and suitability for high-speed elevators; however, strong magnetic field interference can cause signal distortion, affecting the accuracy of elevator position detection.

[0004] Another method is to detect the elevator's position using laser ranging. This method works by emitting a modulated laser beam from a laser emitter mounted on the car towards a fixed reflective target at the top or bottom of the shaft. The reflected light signal is captured by a receiver, and the time difference or phase difference between the laser beam and the target is precisely calculated using the phase difference method or time-of-flight method. Combined with the speed of light constant, the real-time distance between the car and the reflective target is calculated. This distance is then converted into the elevator's absolute position information through a preset shaft position mapping relationship, ultimately outputting high-precision position data to the control system, achieving non-contact, vibration-resistant displacement monitoring. The advantages of this method are high measurement accuracy, convenient installation, and strong vibration resistance; however, it is costly and unsuitable for harsh shaft environments with oil stains or dust.

[0005] Therefore, in order to solve the problems in the prior art, this utility model proposes an elevator running position detection device. Utility Model Content

[0006] The purpose of this utility model embodiment is to provide an elevator running position detection device to solve the problems of signal distortion caused by magnetic grating ruler detection of elevator running position in strong magnetic field environment, and the unsuitability of laser rangefinder detection of elevator running position in harsh shaft environment.

[0007] To solve the above problems, the technical solution of this utility model embodiment is as follows:

[0008] This utility model provides an elevator running position detection device, including a measuring rack disposed in the shaft and extending vertically; a measuring gear rotatably disposed on the elevator car and meshing with the measuring rack; and a rotary encoder disposed on the elevator car, the rotating shaft of the rotary encoder being coaxially and fixedly connected to the measuring gear.

[0009] Furthermore, in a preferred embodiment, a balancing slide is provided between the measuring gear and the rotary encoder and the elevator car. The balancing slide is slidably connected to the elevator car, and sliding causes the balancing slide to move closer to or further away from the measuring rack. The balancing slide provides a self-balancing element for the measuring gear and the rotary encoder, and the self-balancing element is used to apply a force toward the measuring rack to the balancing slide.

[0010] Furthermore, in a preferred embodiment, the self-balancing component is a spring, with one end connected to the balance slide and the other end connected to the elevator car.

[0011] Furthermore, in a preferred embodiment, the self-balancing component includes two repulsive electromagnets, one of which is disposed on the balancing slide and the other is disposed on the elevator car, with the two repulsive electromagnets having the same poles and repelling each other.

[0012] Furthermore, in a preferred embodiment, the end of the self-balancing component away from the balancing slide is connected to an initial position slide, which is slidably connected to the elevator car, and the sliding direction is parallel to the sliding direction of the balancing slide.

[0013] Furthermore, in a preferred embodiment, a bolt seat and an adjusting bolt are provided between the initial position slide and the elevator car, the bolt seat being fixedly connected to the elevator car; the shank of the adjusting bolt is threaded through the bolt seat, and the shank of the adjusting bolt is rotatably connected to the initial position slide.

[0014] Furthermore, in a preferred embodiment, a variable-tooth slide and a mounting shaft are provided between the measuring gear and the balance slide. The variable-tooth slide is horizontally slidably disposed on the balance slide, and the sliding direction of the variable-tooth slide is perpendicular to the sliding direction of the balance slide. The mounting shaft is rotatably disposed on the variable-tooth slide, and multiple measuring gears of different diameters are fitted onto the mounting shaft. The mounting shaft and the rotating shaft of the rotary encoder are connected by a telescopic transmission.

[0015] Furthermore, in a preferred embodiment of some embodiments, the variable tooth slide is the slide portion of a hand-cranked screw slide.

[0016] Furthermore, in a preferred embodiment, the end face of the wheel shaft is provided with a transmission groove, the cross-section of which is polygonal; the rotating shaft of the rotary encoder is connected to a transmission block, the transmission block being polygonal in shape, and the transmission block being slidably inserted into the transmission groove.

[0017] Compared with the prior art, the elevator running position detection device provided in this embodiment of the present invention has the following advantages:

[0018] 1. By employing a measuring rack and measuring gear meshing, the elevator car then drives the measuring gear to rotate, and a rotary encoder converts the rotational motion of the measuring gear into a digital signal and sends it to the elevator system, thereby realizing the detection of the elevator's operating position.

[0019] 2. By using multiple gears, an elevator position detection device can be used to detect elevators at different floor heights. This detection method is suitable for harsh shaft environments and will not be affected by magnetic field interference, which would cause the elevator position detection to fail. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0021] Figure 2 This is a partial structural schematic diagram of the present invention.

[0022] Figure 3 This is a partial structural schematic diagram of the present invention.

[0023] Explanation of reference numerals in the attached drawings: 1. Shaft; 2. Elevator car; 3. Measuring rack; 4. Measuring gear; 41. Wheel mounting shaft; 42. Transmission groove; 43. Transmission block; 5. Rotary encoder; 6. Balancing slide; 7. Self-balancing component; 8. Initial position slide; 81. Bolt seat; 82. Adjustment bolt; 9. Variable gear slide. Detailed Implementation

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention, for example, the terms "length," "width," "upper," "lower," "left," "right," "front," and "rear."

[0025] The orientations or positions indicated by terms such as "vertical," "horizontal," "top," "bottom," "inner," and "outer" are based on the orientations or positions shown in the attached drawings and are only for ease of description and should not be construed as limitations on this technical solution.

[0026] Furthermore, the reference to "embodiment" herein means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0027] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.

[0028] This utility model provides an elevator running position detection device.

[0029] Reference Figure 1-2 The detection device needs to be used in conjunction with the shaft 1 and the elevator car 2. Its purpose is to detect the position of the elevator car 2 within the shaft 1. Specifically, the detection device includes a measuring rack 3, a measuring gear 4, and a rotary encoder 5. The measuring rack 3 is installed in the shaft 1 and extends vertically. The reason for extending vertically is that the elevator car 2 is a vertically moving object. The measuring gear 4 is rotatably mounted on the elevator car 2. Usually, the measuring gear 4 is located outside the elevator car 2 and meshes with the measuring rack 3. As the elevator car 2 moves, the measuring gear 4 also moves with the meshing measuring rack 3, thus realizing the rotation of the measuring gear 4. The rotary encoder 5 is installed on the elevator car 2, and the rotating shaft of the rotary encoder 5 is coaxially and fixedly connected to the measuring gear 4.

[0030] The rotary encoder 5 is an electronic component used to measure the elevator's running position. It is a sensor that converts rotational motion into precise digital signals to measure rotational angle, speed, acceleration, or direction. In this embodiment, the rotary encoder 5 is coaxially connected to the measuring gear 4. The measuring gear 4 drives the rotary encoder 5 to rotate, and the rotary encoder 5 outputs this rotational motion as a digital signal, thereby realizing the detection of the elevator's running position.

[0031] In summary, by employing the cooperation of measuring rack 3 and measuring gear 4, the measuring gear 4 rotates as the elevator car 2 moves. The rotary encoder 5 connected to the measuring gear 4 converts this rotational motion into a digital signal for output, which is then uploaded to the elevator control system to detect the elevator's operating position. Furthermore, the method in this embodiment does not reduce detection accuracy due to magnetic field interference and is applicable to the harsh environment of the shaft 1, which is often characterized by oil and dust.

[0032] As mentioned above, the rotation of the measuring gear 4 causes the rotary encoder 5 to convert this rotational motion into a digital signal and send it to the elevator control system to detect the elevator's operating position. The rotation of the measuring gear 4 is achieved by meshing with the measuring rack 3 mounted on the hoistway 1, which in turn drives the measuring gear 4 to rotate as the elevator car 2 moves. This method requires high precision in the meshing between the measuring rack 3 and the measuring gear 4. Only when the meshing precision is high can the elevator car 2 operate smoothly, and the rotary encoder 5 will also convert the rotational motion of the measuring gear 4 into a digital signal more accurately. Therefore, to achieve this effect—high-precision meshing between the measuring rack 3 and the measuring gear 4—this embodiment uses a balance slide 6 between the measuring gear 4 and the elevator car 2.

[0033] However, during the vertical movement of the elevator car 2, the elevator car 2 will sway horizontally. If it sways towards the measuring rack 3, the measuring gear 4 and the measuring rack 3 will over-mesh and be damaged. If it sways away from the measuring rack 3, the measuring gear 4 and the measuring rack 3 will disengage. Therefore, this problem needs to be solved.

[0034] Reference Figure 1-2 Specifically, a balance slide 6 is provided between the measuring gear 4 and the rotary encoder 5 and the elevator car 2. The balance slide 6 is slidably connected to the elevator car 2. Sliding causes the balance slide 6 to move closer to or away from the measuring rack 3. The balance slide 6 is provided for the measuring gear 4 and the rotary encoder 5. A self-balancing component 7 is provided between the balance slide 6 and the elevator car 2. The self-balancing component 7 is used to apply a force toward the measuring rack 3 to the balance slide 6. In summary, during the movement of the balance slide 6, the measuring gear 4 and the measuring rack 3 can still maintain a moderate pressure engagement through the self-balancing component 7, thereby improving both the service life and the detection accuracy of the detection device.

[0035] Based on the functions that the self-balancing component 7 can achieve, the self-balancing component 7 can be a spring. Specifically, one end of the self-balancing component 7 is connected to the balance slide 6, and the other end is connected to the elevator car 2, which also applies an elastic force to the balance slide 6.

[0036] In other embodiments, the self-balancing element 7 can be two repulsive electromagnets, one of which is mounted on the balancing slide 6 and the other on the elevator car 2. The two repulsive electromagnets are arranged with the same poles repelling each other, that is, the balancing slide 6 applies a magnetic field repulsion force.

[0037] When using this device, two factors need to be considered. First, since the travel and drive mode of different elevator cars 2 are different, the swaying frequency of the elevator car 2 is different. In order to follow this swaying frequency, the elastic force applied by the self-balancing component 7 to the balancing slide 6 needs to be changed. Second, since the height of the floors is different, the higher the floor, the faster the elevator car 2 will move. As the speed is faster, the detection accuracy of the rotary encoder 5 will decrease. Therefore, to adapt to different floors, the measuring gear 4 also needs to be changed to a different diameter. Different diameters require changing the initial position of the balancing slide 6. The initial position here refers to the position of the balancing slide 6 on the elevator car 2 when the measuring gear 4 meshes with the measuring rack 3.

[0038] Taking into account the two factors mentioned above, it is necessary to change the position of the end of the self-balancing component 7 away from the balance slide 6 on the elevator car 2.

[0039] Reference Figure 1-2 Specifically, the self-balancing component 7 is connected to an initial position slide 8 at the end furthest from the balancing slide 6. The initial position slide 8 is slidably connected to the elevator car 2, and the sliding direction is parallel to the sliding direction of the balancing slide 6. There are many ways to achieve the slidable connection between the initial position slide 8 and the elevator car 2. For example, a combination of a guide rail and a slide can be used, which is a high-precision method for achieving linear motion. Alternatively, a cylinder piston rod can also achieve a linear motion slidable connection under air pressure; this method is often used in mold opening and closing and fixture applications.

[0040] In this embodiment, the purpose of sliding the initial slide block 8 to the elevator car 2 is to change the position of the initial slide block 8. Since high precision is not required to change the sliding position of the initial slide block 8, a bolt seat 81 and an adjusting bolt 82 are provided between the initial slide block 8 and the elevator car 2. Specifically, the bolt seat 81 is fixedly connected to the elevator car 2, and the shank of the adjusting bolt 82 is threaded through the bolt seat 81, with the shank of the adjusting bolt 82 rotatably connected to the initial slide block 8. Specifically, by rotating the adjusting bolt 82, which is mounted on the bolt seat 81, the self-balancing component 7 mounted on the adjusting bolt 82 can move linearly, thereby adjusting the position of the self-balancing component 7.

[0041] As mentioned above, different diameter measuring gears 4 will be used due to the different floor heights. However, in actual use, there will be differences. For example, some office buildings will have low-rise elevators, mid-rise elevators and high-rise elevators, while others will have odd-numbered elevators and double-decker elevators. Some office buildings will not distinguish between them, and some will even distinguish between passenger elevators and freight elevators. In general, the transportation will be carried out more efficiently based on different scenarios. In order to cope with complex scenarios, the detection device will be equipped with multiple measuring gears 4 of different diameters, so as to adapt to the different scenarios mentioned above by the cooperation of different measuring gears 4 and measuring racks 3.

[0042] Reference Figure 1-2 Specifically, a variable-tooth slide 9 and a gear mounting shaft 41 are provided between the measuring gear 4 and the balance slide 6. The variable-tooth slide 9 is horizontally slidably mounted on the balance slide 6, and the sliding direction of the variable-tooth slide 9 is perpendicular to the sliding direction of the balance slide 6. The gear mounting shaft 41 is rotatably mounted on the variable-tooth slide 9. The gear mounting shaft 41 is used to mount multiple measuring gears 4 of different diameters. The gear mounting shaft 41 is telescopically connected to the rotating shaft of the rotary encoder 5, so that when the variable-tooth slide 9 is moved, the gear mounting shaft 41 still forms a transmission connection with the rotating shaft of the rotary encoder 5. With this setting, multiple measuring gears 4 can be moved as mentioned above, thereby realizing the engagement of any measuring gear 4 with the measuring rack 3.

[0043] In addition, in this embodiment, the operator can easily replace the measuring gear 4 with one of different diameters according to the actual use scenario, so as to realize the situation of replacing the measuring gear 4 when it is worn out, and replacing it with a measuring gear 4 of different diameters to meet the needs of different floor heights.

[0044] Based on the above, in order to realize the aforementioned replacement of the measuring gear 4 meshing with the measuring rack 3 by changing the position of the variable gear slide 9, the variable gear slide 9 is further defined as the slide part of the hand-cranked screw slide table.

[0045] Reference Figure 2-3 Meanwhile, in order to realize the retractable transmission connection between the rotary encoder 5 and the wheel shaft 41 mentioned above, the end face of the wheel shaft 41 is provided with a transmission groove 42. The cross-section of the transmission groove 42 is polygonal, for example, a regular hexagon. The rotating shaft of the rotary encoder 5 is connected to a transmission block 43. The transmission block 43 is in the shape of a polygonal prism, for example, a regular hexagonal prism. The transmission block 43 is slidably inserted into the transmission groove 42.

[0046] In summary, the present invention can detect the elevator's operating position and adapt to the harsh environment of the shaft 1 during detection.

[0047] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An elevator operating position detection device for connecting a hoistway (1) and an elevator car (2), characterized by: The elevator running position detection device includes: A measuring rack (3) is provided in the wellbore (1), and the measuring rack (3) extends vertically. A measuring gear (4) is rotatably mounted on the elevator car (2), and the measuring gear (4) meshes with the measuring rack (3); A rotary encoder (5) is installed on the elevator car (2), and the rotating shaft of the rotary encoder (5) is coaxially and fixedly connected to the measuring gear (4).

2. The elevator running position detection device according to claim 1, characterized in that: A balance slide (6) is provided between the measuring gear (4) and the rotary encoder (5) and the elevator car (2). The balance slide (6) is slidably connected to the elevator car (2). Sliding causes the balance slide (6) to move closer to or away from the measuring rack (3). The balance slide (6) provides a self-balancing component (7) for the measuring gear (4) and the rotary encoder (5). The self-balancing component (7) is used to apply a force toward the measuring rack (3) to the balance slide (6).

3. The elevator running position detection device according to claim 2, characterized in that: The self-balancing component (7) is a spring. One end of the self-balancing component (7) is connected to the balance slide (6), and the other end is connected to the elevator car (2).

4. The elevator running position detection device according to claim 2, characterized in that: The self-balancing component (7) includes two repulsive electromagnets, one of which is disposed on the balance slide (6) and the other is disposed on the elevator car (2). The two repulsive electromagnets are arranged with the same poles repelling each other.

5. The elevator running position detection device according to claim 3, characterized in that: The self-balancing component (7) is connected to an initial position slide (8) at one end away from the balancing slide (6). The initial position slide (8) is slidably connected to the elevator car (2), and the sliding direction is parallel to the sliding direction of the balancing slide (6).

6. The elevator running position detection device according to claim 5, characterized in that: A bolt seat (81) and an adjusting bolt (82) are provided between the initial position slide (8) and the elevator car (2). The bolt seat (81) is fixedly connected to the elevator car (2). The shank of the adjusting bolt (82) is threaded through the bolt seat (81), and the shank of the adjusting bolt (82) is rotatably connected to the initial position slide (8).

7. The elevator running position detection device according to claim 5, characterized in that: A variable-tooth slide (9) and a gear mounting shaft (41) are provided between the measuring gear (4) and the balance slide (6). The variable-tooth slide (9) is horizontally slidably disposed on the balance slide (6), and the sliding direction of the variable-tooth slide (9) is perpendicular to the sliding direction of the balance slide (6). The gear mounting shaft (41) is rotatably disposed on the variable-tooth slide (9), and the gear mounting shaft (41) is provided for multiple measuring gears (4) of different diameters to be fitted. The gear mounting shaft (41) and the rotating shaft of the rotary encoder (5) are connected by a telescopic transmission.

8. The elevator running position detection device according to claim 7, characterized in that: The variable tooth slide (9) is the slide part of the hand-cranked screw slide table.

9. The elevator running position detection device according to claim 7, characterized in that: The end face of the wheel shaft (41) is provided with a transmission groove (42), and the cross section of the transmission groove (42) is polygonal; the rotating shaft of the rotary encoder (5) is connected to a transmission block (43), the transmission block (43) is in the shape of a polygonal prism, and the transmission block (43) is slidably inserted into the transmission groove (42).

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