Elevator sheave misalignment wear detection device
By designing an elevator traction sheave detection device with adjustable sliders and integrated sensors, the problems of poor versatility and inaccurate detection in existing technologies have been solved. This enables precise wear and offset detection of traction sheaves of different specifications, thereby improving the safety and efficiency of elevator operation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUANGDONG SPECIAL EQUIP TESTING INST FOSHAN TESTING INST
- Filing Date
- 2025-07-10
- Publication Date
- 2026-07-24
AI Technical Summary
Existing elevator traction sheave detection devices cannot adapt to traction sheaves of different sizes, wire groove spacings, and wire groove numbers. They have poor versatility, insufficient wear assessment, and inadequate offset monitoring, which affects elevator operation safety.
A detection device including a mounting base, a movable base, a slider, a telescopic rod, a detection block, and an optical sensor is designed. The device can detect the wear and offset of traction wheels of different specifications through an adjustable slider and a pressure sensor, and integrate an optical sensor for offset monitoring.
This improves the applicability and accuracy of the detection device, enabling accurate assessment of wear and monitoring of deviations, thus enhancing the efficiency and safety of elevator maintenance and inspection.
Smart Images
Figure CN224547805U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of elevators, and in particular to an elevator traction sheave offset and wear detection device. Background Technology
[0002] An elevator is a permanent transportation device that serves several specific floors within a building. Its car moves along at least two rigid tracks perpendicular to the horizontal plane or at an angle of less than 15° to the vertical. As a common type of transportation equipment, the safe operation of elevators is crucial. Elevators use a traction machine to drive a traction sheave, which in turn pulls the car and counterweight up and down via steel cables. The traction sheave typically has multiple grooves for embedding the steel cables. The friction between the traction sheave and the steel cables is relatively high, making them prone to wear and even misalignment after prolonged operation. Wear and misalignment of the traction sheave affect the guiding and traction effects of the steel cables, leading to insufficient traction force and posing a potential safety hazard to the elevator. Therefore, regular wear and misalignment checks of the traction sheave are an important part of elevator maintenance.
[0003] However, existing devices for inspecting traction sheaves are often only applicable to specific models. When the diameter of the traction sheave, the spacing of the wire rope grooves, or the number of grooves varies, existing inspection devices cannot be adjusted accordingly, thus failing to effectively inspect traction sheaves of different sizes or specifications. This limits the versatility of existing inspection devices, increases the complexity and cost of maintenance work, and therefore has certain limitations. Utility Model Content
[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing an elevator traction sheave offset and wear detection device.
[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: an elevator traction sheave offset and wear detection device, comprising: a mounting base and a traction sheave, wherein movable seats are symmetrically arranged on both sides of the mounting base, and a plurality of first sliders are arranged at the bottom of the mounting base;
[0006] The mounting base has a second sliding groove on both sides, and a second slider that slides in cooperation with the second sliding groove is fixedly connected to the movable base;
[0007] The bottom of the mounting base is provided with a first sliding groove, and the first slider is slidably connected to the first sliding groove;
[0008] A telescopic rod is fixedly connected to the bottom of the first slider, and a detection block is fixedly connected to the bottom end of the telescopic rod.
[0009] Preferably, a first bolt is threaded onto the first slider, and a movable rod is fixedly installed at the end of the first bolt, with the end of the movable rod abutting against one side of the adjacent first slider.
[0010] Preferably, the movable seat is threaded with a second bolt, the end of which abuts against the side wall of the adjacent first slider.
[0011] Preferably, the telescopic rod includes an inner rod and an outer rod with an inner cavity. The inner rod and the inner cavity of the outer rod are vertically slidably connected. A pressure sensor is fixedly connected inside the inner cavity of the outer rod. The top of the inner rod is connected to the pressure sensor via a spring.
[0012] Preferably, the bottom of the detection block has an arc-shaped portion.
[0013] Preferably, a mounting cavity is provided on one side of the movable base for mounting an optical sensor.
[0014] Preferably, the traction sheave has a wire groove.
[0015] Preferably, the arc-shaped portion fits into the inner wall of the wire groove.
[0016] Compared with the prior art, the present invention has the following beneficial effects:
[0017] This utility model provides an elevator traction sheave misalignment and wear detection device. Through multiple adjustable sliding blocks arranged within a first groove, the device can be easily adjusted to accommodate traction sheaves of different sizes, wire groove spacings, and numbers of wire grooves. This solves the technical problem of poor versatility and inability to detect different types of traction sheaves in existing detection devices, thus improving the device's applicability. Simultaneously, by using a telescopic rod, detection block, spring, and pressure sensor, the device can accurately sense pressure changes within the wire groove cavity, thereby accurately assessing the wear degree of the wire groove. Furthermore, a mounting cavity for installing an optical sensor is provided on the movable base, allowing for convenient integration of the optical sensor to monitor traction sheave misalignment. This device integrates the detection functions of traction sheave wear and misalignment, possesses good adaptability, accurately assesses the degree of wear, and monitors misalignment, improving the efficiency and accuracy of elevator maintenance and inspection, thereby ensuring elevator operational safety. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the overall structure of an elevator traction sheave offset and wear detection device.
[0019] Figure 2 This is a schematic diagram of the first slide of an elevator traction sheave offset and wear detection device.
[0020] Figure 3 This is a schematic diagram of the movable base of an elevator traction sheave offset and wear detection device.
[0021] Figure 4 This is a schematic diagram of the first slider of an elevator traction sheave offset and wear detection device.
[0022] Figure 5 This is a schematic diagram of the internal structure of a telescopic rod in an elevator traction sheave offset and wear detection device.
[0023] Explanation of structural icon numbers
[0024] 1. Mounting base; 2. Movable base; 3. First slider; 4. First slide groove; 5. Second slider; 6. Second slide groove; 7. First bolt; 8. Movable rod; 9. Second bolt; 10. Telescopic rod; 11. Detection block; 12. Arc-shaped part; 13. Mounting cavity; 14. Traction wheel; 15. Wire groove; 16. Outer rod; 17. Pressure sensor; 18. Inner rod; 19. Spring. Detailed Implementation
[0025] The following description is intended to disclose the present invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art.
[0026] With the development of modern building technology, elevators have become widely used as an important vertical transportation tool. The elevator traction sheave is a crucial component of the elevator system, achieving the raising and lowering of the car through friction with the steel wire rope. During long-term operation, the steel wire grooves on the traction sheave will wear due to friction, potentially leading to sheave misalignment. These problems not only affect the elevator's operating efficiency but also pose a potential threat to passenger safety. Therefore, accurate and convenient detection of traction sheave wear and misalignment is particularly important. However, existing detection devices are often designed for specific traction sheave models, making it difficult to adapt to traction sheaves of different diameters, steel wire groove spacings, or numbers of steel wire grooves. Their versatility is poor, and their assessment of wear degree is not precise enough, and their monitoring of misalignment may be insufficient. To address these limitations of existing technology, this invention proposes an elevator traction sheave misalignment and wear detection device.
[0027] like Figures 1 to 5 An elevator traction sheave offset wear detection device is shown, comprising: a mounting base 1 and a traction sheave 14, with movable seats 2 symmetrically arranged on both sides of the mounting base 1, and a plurality of first sliders 3 arranged at the bottom of the mounting base 1;
[0028] The mounting base 1 has a second sliding groove 6 on both sides, and the movable base 2 has a second slider 5 that slides in cooperation with the second sliding groove 6.
[0029] The bottom of the mounting base 1 is provided with a first sliding groove 4, and the first slider 3 is slidably connected to the first sliding groove 4;
[0030] The bottom of the first slider 3 is fixedly connected to a telescopic rod 10, and the bottom end of the telescopic rod 10 is fixedly connected to a detection block 11.
[0031] The traction sheave 14 is provided with a wire groove 15.
[0032] In practical implementation, the design of adjusting the distance between the first bolt 7 and the adjacent first slider 3 through the first bolt 7 and the moving rod 8, as well as the design of increasing or decreasing the number of first sliders 3 as needed, allows the device to flexibly adapt to traction wheels 14 with different diameters, different spacings of wire grooves 15, and different numbers of wire grooves 15, greatly improving the versatility of the device. Simultaneously, the setting of the pressure sensor 17, with the help of the detection block 11 and the ability to detect the wear degree of the wire grooves 15, provides more accurate and reliable wear data, overcoming the problem of inaccurate wear assessment in existing technologies. Furthermore, the installation cavity 13 on the moving base 2 for mounting optical sensors allows the device to easily integrate offset detection functions, facilitating thorough detection of the state of the traction wheel 14.
[0033] In one embodiment of this utility model, a first bolt 7 is threadedly connected to the first slider 3, and a movable rod 8 is fixedly installed at the end of the first bolt 7. The end of the movable rod 8 abuts against one side of the adjacent first slider 3.
[0034] In practice, by tightening the first bolt 7, the first bolt 7 and the moving rod 8 can move axially relative to the first slider 3 under the action of the threaded connection, so that the ends of the first bolt 7 and the moving rod 8 abut against the side wall of the adjacent first slider 3, thereby adjusting the spacing between multiple first sliders 3 and facilitating the device to test traction wheels 14 of different specifications.
[0035] In one embodiment of this utility model, a second bolt 9 is threadedly connected to the movable seat 2, and the end of the second bolt 9 abuts against the side wall of the adjacent first slider 3.
[0036] In practical implementation, when the second bolt 9 is screwed into a certain position, one end of it protrudes and abuts against the side wall of the adjacent first slider 3 mounted on the mounting base 1. By rotating the second bolt 9, its end abuts against the adjacent first slider 3, effectively restricting the sliding of the movable seat 2 relative to the mounting base 1. Simultaneously, it also helps to fix the position of the first slider 3. The second bolt 9 abutting against the adjacent first slider 3 forms a double lock or limit on the movable seat 2 and the first slider 3, preventing undesirable displacement of these components due to external force or vibration during the testing process, thereby improving the accuracy and reliability of the test. This limiting structure is an important guarantee for ensuring the stable operation of the device in actual testing environments, further enhancing the practicality of this utility model.
[0037] As one embodiment of the present invention, the telescopic rod 10 includes an inner rod 18 and an outer rod 16 with an inner cavity. The inner rod 18 and the inner cavity of the outer rod 16 are vertically slidably connected. A pressure sensor 17 is fixedly connected inside the inner cavity of the outer rod 16. The top of the inner rod 18 is connected to the pressure sensor 17 through a spring 19.
[0038] In practical implementation, when the telescopic rod 10 extends or retracts due to external force, the inner rod 18 moves relative to the outer rod 16, causing the spring 19 sandwiched between them to be compressed. The deformation of the spring 19 generates a force, which is transmitted to the pressure sensor 17, causing the pressure sensor 17 to sense the corresponding pressure change. The magnitude of this pressure change reflects the axial force or the degree of extension or retraction of the telescopic rod 10. By detecting the force change of the spring 19 inside the telescopic rod 10, the actual size of the wire groove 15 can be determined, thereby providing more comprehensive data to assess the degree of wear. The pressure is greatest when the wire groove 15 is not worn. As the wire groove 15 wears, the inner diameter of the wire groove 15 decreases relative to the unworn inner diameter, the distance to the pressure sensor 17 increases, and the pressure on the spring 19 decreases. Therefore, the pressure of the pressure sensor 17 decreases as the degree of wear increases, improving the accuracy and reliability of wear detection and further enhancing the technical effect of this utility model.
[0039] As one embodiment of this utility model, the bottom of the detection block 11 is provided with an arc-shaped part 12.
[0040] In specific implementation, the curvature and shape of the arc-shaped part 12 are designed to match the inner wall curvature of the wire groove 15 of the standard or the traction wheel 14 to be tested. By designing the bottom to be an arc shape that fits against the inner wall of the wire groove 15, it can be ensured that the test block 11 can be placed more stably and tightly in the wire groove 15. The design of the arc-shaped part 12 is an important detail to ensure that the test block can effectively perform the test function, and further improves the test performance of this utility model.
[0041] As one embodiment of this utility model, a mounting cavity 13 is provided on one side of the movable base 2 for mounting an optical sensor.
[0042] In practical implementation, by setting the mounting cavity 13 on the movable seat 2, a predetermined and stable mounting position is provided for the optical sensor. The optical sensor installed in the mounting cavity 13 can emit a light beam to the side of the traction sheave 14 and detect the lateral position of the traction sheave 14 relative to the device based on the change in reflected light, thereby determining whether the traction sheave 14 has deviated. This deviation detection function, combined with the wear detection function, enables this invention to conduct a more comprehensive assessment of the condition of the traction sheave 14, further enhancing the functionality and practicality of the device and improving the level of elevator operation safety monitoring.
[0043] In one embodiment of this utility model, the arc-shaped part 12 is fitted to the inner wall of the wire groove 15.
[0044] In practical implementation, when the detection device is installed in place, the traction wheel 14 with the wire groove 15 rests against the bottom of the detection block 11, so that the detection block 11 is placed inside the wire groove 15, compressing the spring 19. The arc-shaped part 12 will fit tightly against the inner wall curved surface of the wire groove 15, ensuring that the pressure sensor 17 can accurately sense the pressure of the inner wall of the wire groove 15 with different degrees of wear, thereby more accurately reflecting the actual wear condition of the wire groove 15. This fitting characteristic is the key factor in achieving high-precision wear detection, further improving the overall detection performance of this utility model.
[0045] Working principle of this utility model:
[0046] When using the elevator traction sheave offset wear detection device of this utility model, adjustments can first be made according to the specifications of the traction sheave 14 to be tested. For example, the installation space can be opened by moving the moving seat 2 upward (sliding within the second slide groove 6 via the second slider 5). Then, according to the spacing of the wire grooves 15 on the traction sheave 14, the distance between adjacent first sliders 3 can be adjusted by rotating the first bolt 7 on the first slider 3, thereby driving the moving rod 8 to match the spacing of the wire grooves 15. At the same time, according to the number of wire grooves 15 to be tested on the traction sheave 14, a corresponding number of first sliders 3 can be inserted into the first slide groove 4 of the mounting seat 1. After adjustment, the moving seats 2 on both sides are moved downward and reset within the second slide groove 6 via the second slider 5, closing both sides of the first slide groove 4. Next, the second bolt 9 on the moving seat 2 is rotated so that one end abuts against one side of the first slider 3, thereby limiting and fixing the moving seat 2 and several first sliders 3 to ensure that the device is installed stably.
[0047] After installation, the wire groove 15 on the traction sheave 14 can be placed against the bottom of the detection block 11. The arc-shaped part 12 at the bottom of the detection block 11 will fit against the inner wall of the wire groove 15. If the wire groove 15 is worn, its diameter will change, which will cause the contact pressure between the detection block 11 and the wall of the wire groove 15 to change relative to the unworn pressure. This pressure change will be sensed by the pressure sensor 17. By analyzing the magnitude of the pressure change sensed by the pressure sensor 17, the wear degree of the wire groove 15 can be accurately assessed. When performing offset detection on the traction sheave 14, an optical sensor installed in the mounting cavity 13 of the moving seat 2 can emit a beam of light to one side surface of the traction sheave 14 and detect the change in the reflected light to monitor the position of the traction sheave 14 and determine whether it has shifted. The entire detection process is quantitatively evaluated through sensor data, which improves the objectivity and accuracy of the detection.
[0048] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope. All such changes and modifications fall within the scope of protection claimed by this utility model, which is defined by the appended claims and their equivalents.
Claims
1. A device for detecting the offset and wear of an elevator traction sheave, characterized in that, include: Mounting base (1) and traction wheel (14), with movable seats (2) symmetrically arranged on both sides of the mounting base (1), and multiple first sliders (3) arranged at the bottom of the mounting base (1); The mounting base (1) has a second sliding groove (6) on both sides, and the movable base (2) is fixedly connected with a second slider (5) that slides in cooperation with the second sliding groove (6); The bottom of the mounting base (1) is provided with a first sliding groove (4), and the first slider (3) is slidably connected to the first sliding groove (4); The bottom of the first slider (3) is fixedly connected to a telescopic rod (10), and the bottom end of the telescopic rod (10) is fixedly connected to a detection block (11).
2. The elevator traction sheave offset and wear detection device according to claim 1, characterized in that, The first slider (3) is threaded with a first bolt (7), and a moving rod (8) is fixedly installed at the end of the first bolt (7). The end of the moving rod (8) abuts against one side of the adjacent first slider (3).
3. The elevator traction sheave offset and wear detection device according to claim 2, characterized in that, The movable seat (2) is threaded with a second bolt (9), the end of which abuts against the side wall of the adjacent first slider (3).
4. The elevator traction sheave offset and wear detection device according to claim 1, characterized in that, The telescopic rod (10) includes an inner rod (18) and an outer rod (16) with an inner cavity. The inner rod (18) and the inner cavity of the outer rod (16) are vertically slidably connected. A pressure sensor (17) is fixedly connected inside the inner cavity of the outer rod (16). The top of the inner rod (18) is connected to the pressure sensor (17) through a spring (19).
5. The elevator traction sheave offset and wear detection device according to claim 1, characterized in that, The bottom of the detection block (11) has an arc-shaped part (12).
6. The elevator traction sheave offset and wear detection device according to claim 5, characterized in that, The movable base (2) has a mounting cavity (13) on one side for mounting an optical sensor.
7. The elevator traction sheave offset and wear detection device according to claim 6, characterized in that, The traction sheave (14) is provided with a wire groove (15).
8. The elevator traction sheave offset and wear detection device according to claim 7, characterized in that, The arc-shaped part (12) is in contact with the inner wall of the wire groove (15).