Guide rail straightness laser detection equipment for elevator

Abstract

The invention provides guide rail straightness laser detection equipment for an elevator, and relates to the technical field of laser detection, the guide rail straightness laser detection equipment comprises a telescopic cylinder and a telescopic rod, the end part of the telescopic cylinder is provided with a telescopic hole capable of accommodating the telescopic rod, the telescopic rod is slidably mounted in the telescopic hole, and one side of the telescopic cylinder is fixedly provided with a mounting block; a laser transmitter is mounted on the mounting block, a test frame is mounted on the telescopic rod, a through hole is formed in the test frame, and a transparent sheet is mounted in the through hole. According to the laser detection equipment for the straightness of the guide rail of the elevator, the telescopic cylinder, the telescopic rod, the mounting block, the laser transmitter, the test frame, the transparent sheet, the measuring wheel and the offset measuring mechanism are arranged, so that the measuring wheel can roll along the guide rail of the elevator by taking the telescopic rod and the telescopic cylinder as references; the straightness condition of the elevator guide rail is judged according to the movement track deviation condition of the measuring wheel rolling along the elevator guide rail, the operation is simple, and the detection result is accurate.

Description

Technical Field

[0001] This invention relates to the field of laser inspection technology, and in particular to a laser inspection device for the straightness of elevator guide rails. Background Technology

[0002] As the guiding reference component for the elevator car's vertical movement, the straightness of the elevator guide rail directly determines the elevator's smoothness, safety, and comfort, making it a core inspection indicator during elevator installation, commissioning, and routine maintenance. With the increasing speed and demand for high-precision operation of elevators, the accuracy requirements for guide rail straightness testing are constantly rising. Traditional testing methods, such as the string method and level measurement, are greatly affected by manual operation and environmental interference, resulting in low efficiency and limited accuracy, making them insufficient to meet the testing needs of modern elevators. Laser testing technology, with its advantages of good straightness, high collimation, and wide detection range, is gradually becoming the mainstream technical solution for elevator guide rail straightness testing.

[0003] However, in practical applications, existing laser inspection equipment still relies on operators visually aligning the laser emission path with preset reference points on the guide rail (such as engraved marks or positioning holes) to determine the starting position of the inspection. During this operation, factors such as operator visual fatigue, subjective judgment bias, and changes in ambient light can easily lead to errors in reference point alignment, which in turn cause the laser inspection path to deviate, ultimately affecting the accuracy and reliability of the flatness inspection results. Summary of the Invention

[0004] Based on the technical problems existing in the background art, the present invention proposes a laser detection device for the straightness of elevator guide rails.

[0005] This invention proposes a laser testing device for the straightness of elevator guide rails, comprising a telescopic cylinder and a telescopic rod. The end of the telescopic cylinder has a telescopic hole for receiving the telescopic rod, which is slidably installed in the telescopic hole. A mounting block is fixedly installed on one side of the telescopic cylinder, and a laser emitter is mounted on the mounting block. A test frame is mounted on the telescopic rod, and a through hole is provided on the test frame. A transparent sheet is installed in the through hole, and the beam of the laser emitter irradiates and is perpendicular to the transparent sheet.

[0006] A measuring wheel is rotatably mounted on the test frame, and the measuring wheel can roll along the elevator guide rail. An offset measuring mechanism is also mounted on the test frame, which is used to detect the amount of displacement of the measuring wheel as it rolls along the elevator.

[0007] Preferably, the offset measuring mechanism includes a side block, a moving block, a measuring shaft, a lateral offset measuring component, and a longitudinal offset measuring component; the side block is fixedly mounted on the test frame, a rolling groove is formed on the side block, and moving grooves are formed on both inner walls of the rolling groove; the moving block is located in the moving groove; and the longitudinal offset measuring component is used to measure the offset displacement of the moving block in the moving groove.

[0008] Measuring holes are provided on the sides of the two moving blocks that are close to each other. The two ends of the measuring shaft are slidably inserted into the two measuring holes respectively. The lateral offset measuring component is used to measure the displacement of the measuring shaft within the measuring holes.

[0009] The measuring wheel is mounted on the measuring shaft.

[0010] Preferably, the longitudinal offset measuring component includes a constant force spring, a measuring rod, and a reset assembly; multiple rotating slots are provided in the side block, and the multiple rotating slots are arranged in a circular array on the outer periphery of the moving slot; the number of constant force springs is the same as the number of rotating slots and they are set one-to-one; the inner ring end of the constant force spring is fixedly installed in the rotating slot; one end of the measuring rod passes through the inner wall of the moving slot and is connected to the outer ring end of the constant force spring; the end of the measuring rod away from the constant force spring abuts against the outer periphery of the moving block.

[0011] The reset component is used to drive the moving block to slide and reset within the moving slot.

[0012] Preferably, the reset assembly includes a plurality of elastic telescopic rods; the plurality of elastic telescopic rods are arranged in a circular array on the outer periphery of the moving block, the elastic telescopic rods are rotatably mounted on the inner ring wall of the moving groove, and the output shaft of the elastic telescopic rods is rotatably connected to the outer periphery of the moving block.

[0013] Preferably, the lateral offset measuring component includes a measuring cylinder, a fixed electrode, a movable electrode, a reinforcing component, and a recovery component; a working groove is provided in the moving block, the measuring cylinder is fixedly installed in the working groove, the fixed electrode is fixedly installed in the measuring cylinder, the movable electrode is slidably installed in the measuring cylinder, and the movable electrode is arranged parallel to the fixed electrode; the reinforcing component can amplify and transfer the displacement of the measuring shaft in the measuring hole into the displacement of the movable electrode in the measuring cylinder.

[0014] The recovery component is used to drive the measuring axis to slide and reset within the measuring hole.

[0015] Preferably, the reinforcing assembly includes a traction rod, a moving wheel frame, moving wheels, fixed wheels, and a guide rope; the traction rod is fixedly mounted on the measuring shaft, the moving block has a sliding groove that slides with the traction rod, the moving wheel frame is slidably mounted in the working groove, the transverse section of the moving wheel frame is connected to the traction rod, there are multiple moving wheels, all of which are rotatably mounted on the moving wheel frame, there are multiple fixed wheels, all of which are rotatably mounted in the working groove, one end of the guide rope is fixedly mounted on the inner wall of the working groove, and the other end of the guide rope passes sequentially around multiple moving wheels and fixed wheels and is fixedly connected to the movable electrode.

[0016] Preferably, the recovery assembly includes a return spring; the return spring is located inside the measuring hole, and both ends of the return spring abut against the end of the measuring shaft and the inner wall of the end of the measuring hole, respectively.

[0017] Preferably, a measuring spring is also provided inside the measuring cylinder, with both ends of the measuring spring abutting against the inner wall of the measuring cylinder and the movable electrode, respectively.

[0018] Preferably, the outer circumference of the measuring wheel is provided with a semi-circular groove, the width of which is greater than the width of the elevator guide rail.

[0019] Preferably, a mounting base is fixedly connected to the bottom of the telescopic cylinder;

[0020] The number of telescopic rods is multiple, and the multiple telescopic rods and the telescopic cylinder form a multi-section telescopic rod, and the multiple transparent sheets are arranged linearly.

[0021] The laser testing device for the straightness of elevator guide rails proposed in this invention has the following advantages: By using a telescopic cylinder, telescopic rod, mounting block, laser emitter, test frame, transparent sheet, measuring wheel, and offset measuring mechanism, the measuring wheel can be rolled along the elevator guide rail with the telescopic rod and telescopic cylinder as a reference. The straightness of the elevator guide rail can be judged based on the offset of the measuring wheel's motion trajectory while rolling along the elevator guide rail. The operation is simple and the test results are accurate. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of a laser detection device for the straightness of elevator guide rails proposed in this invention.

[0023] Figure 2 This is a cross-sectional view of the measuring wheel on the side block in a laser testing device for the straightness of elevator guide rails proposed in this invention;

[0024] Figure 3 This is a front sectional view of the position of the moving block within the side block in a laser detection device for the straightness of elevator guide rails proposed in this invention.

[0025] Figure 4 This invention proposes a laser testing device for the straightness of elevator guide rails. Figure 3 Enlarged view of point A in the middle;

[0026] Figure 5 This is a side cross-sectional view of the position of the moving block within the side block in a laser detection device for the straightness of elevator guide rails proposed in this invention.

[0027] Figure 6 This is a schematic diagram of the measuring axis in a laser detection device for the straightness of elevator guide rails proposed in this invention.

[0028] Figure 7 This invention proposes a laser testing device for the straightness of elevator guide rails. Figure 5 Enlarged view of section B in the middle.

[0029] In the diagram: 1. Telescopic cylinder; 2. Telescopic rod; 3. Mounting block; 4. Laser emitter; 5. Test frame; 6. Transparent sheet; 7. Measuring wheel; 8. Side block; 9. Moving block; 10. Measuring shaft; 11. Moving groove; 12. Constant force spring; 13. Measuring rod; 14. Elastic telescopic rod; 15. Measuring cylinder; 16. Fixed electrode; 17. Movable electrode; 18. Working groove; 19. Traction rod; 20. Moving wheel frame; 21. Moving wheel; 22. Fixed wheel; 23. Guide rope; 24. Measuring spring; 25. Return spring; 26. Mounting base. Detailed Implementation

[0030] Reference Figures 1-7This invention proposes a laser testing device for the straightness of elevator guide rails, comprising a telescopic cylinder 1 and a telescopic rod 2. The end of the telescopic cylinder 1 has a telescopic hole for receiving the telescopic rod 2, which is slidably installed within the telescopic hole. A mounting base 26 is fixedly connected to the bottom of the telescopic cylinder 1. Multiple telescopic rods 2 are present, forming a multi-section telescopic rod with the telescopic cylinder 1. During testing (on the installed elevator guide rail), the multi-section telescopic rod serves as the testing reference. A mounting block 3 is fixedly installed on one side of the telescopic cylinder 1, and a mounting block 3 is mounted on the mounting block 3. A laser emitter 4 is installed, and a test frame 5 is mounted on the telescopic rod 2. The test frame 5 has perforations, and transparent sheets 6 are installed inside the perforations. Multiple transparent sheets 6 are arranged linearly. The laser beam from the laser emitter 4 irradiates and is perpendicular to the transparent sheets 6. During the test, the laser beam from the laser emitter 4 passes through the multiple transparent sheets 6 sequentially, thus ensuring that the multi-section telescopic rod being tested does not bend or deform. A measuring wheel 7 is rotatably mounted on the test frame 5. The outer circumference of the measuring wheel 7 has a semi-circular groove, the width of which is greater than the width of the elevator guide rail. The measuring wheel 7 can... The measuring wheel 7 can roll along the elevator guide rail (simulating the sliding contact between the elevator car and the guide rail during operation; in contrast, the measuring wheel 7 can avoid "rail biting" by moving on its own). The test frame 5 is also equipped with an offset measuring mechanism, which detects the displacement of the measuring wheel 7 as it rolls along the elevator. When testing the straightness of the elevator guide rail, the measuring wheel 7 is first secured to the elevator guide rail. Then, the multi-section telescopic rod is vertically installed in the elevator shaft via the mounting base 26. The laser emitter 4 is turned on, and the telescopic rod 2 of the multi-section telescopic rod is stretched. As the multi-section telescopic rod extends, the measuring wheel 7 rolls along the elevator guide rail. Since the multi-section telescopic rod is used as the measurement reference, if the electric guide rail becomes skewed or other abnormalities while the measuring wheel 7 is rolling along the elevator guide rail, the position of the measuring wheel 7 on the test frame 5 changes. The offset measuring mechanism detects the deflection of the measuring wheel 7, thereby determining the straightness of the elevator guide rail at that point. This eliminates the need for visual comparison by personnel, resulting in more accurate and convenient testing.

[0031] like Figure 2 and Figure 5As shown, the offset measuring mechanism includes a side block 8, a moving block 9, a measuring shaft 10, a lateral offset measuring component, and a longitudinal offset measuring component. The side block 8 is fixedly mounted on the test frame 5. A rolling groove is provided on the side block 8, and the horizontal distance from the side block 8 to the multi-section telescopic rod remains constant. Moving grooves 11 are provided on both inner walls of the rolling groove. The moving block 9 is located in the moving groove 11. The longitudinal offset measuring component is used to measure the offset displacement of the moving block 9 in the moving groove 11. The longitudinal offset measuring component measures the displacement of the moving block 9 in the moving groove 11 to determine the bulging state of the elevator guide rail. The two moving blocks 9... Measuring holes are provided on both sides that are close to each other. The two ends of the measuring shaft 10 are slidably inserted into the two measuring holes respectively. The lateral offset measuring component is used to measure the displacement of the measuring shaft 10 in the measuring hole. The measuring wheel 7 is rotated and mounted on the measuring shaft 10. In actual operation, to detect the straightness of the elevator guide rail, it is necessary to detect the left and right deviation and protrusion of the elevator guide rail. The lateral offset measuring component detects the lateral movement of the measuring shaft 10 in the measuring hole to determine the left and right deviation of the elevator guide rail. Then, the longitudinal offset measuring component detects the protrusion of the measuring wheel 7 to determine the straightness of the elevator guide rail.

[0032] like Figure 5 and Figure 7 As shown, the longitudinal offset measuring component includes a constant force spring 12, a measuring rod 13, and a reset assembly. Multiple rotating slots are formed within the side block 8, arranged in a circular array around the outer periphery of the moving slot 11. The number of constant force springs 12 corresponds to the number of rotating slots, and they are arranged one-to-one. The inner coil of each constant force spring 12 is fixedly installed within the rotating slot. One end of the measuring rod 13 penetrates the inner wall of the moving slot 11 and connects to the outer coil of the constant force spring 12. The end of the measuring rod 13 away from the constant force spring 12 rests against the outer periphery of the moving block 9. The reset assembly is used to drive the moving block 9. The slides back within the moving groove 11. In actual operation, four constant-force springs 12 drive four measuring rods 13 to always abut against the outer periphery of the moving block 9. The displacement of the moving block 9 within the moving groove 11 is determined by measuring the extension and retraction length of the four measuring rods 13, thereby determining the protrusion state of the elevator guide rail. In addition, due to the characteristics of the constant-force springs 12, the force exerted by the measuring rods 13 on the moving block 9 remains consistent, which can prevent changes in force from affecting the timely abutment of the measuring rods 13 against the outer periphery of the moving block 9, ensuring that the measuring rods 13 always abut against the outer periphery of the moving block 9.

[0033] like Figure 3 and Figure 5As shown, the reset assembly includes multiple elastic telescopic rods 14; the multiple elastic telescopic rods 14 are arranged in a ring array on the outer periphery of the moving block 9, and the elastic telescopic rods 14 are rotatably mounted on the inner ring wall of the moving groove 11. The output shaft of the elastic telescopic rod 14 is rotatably connected to the outer periphery of the moving block 9. In actual operation, through the cooperation of multiple elastic telescopic rods 14, the moving block 9 is positioned at the center of the moving groove 11 without being subjected to external force.

[0034] like Figure 3 and Figure 4 As shown, the lateral offset measuring component includes a measuring cylinder 15, a fixed electrode 16, a movable electrode 17, a reinforcing component, and a recovery component. A working groove 18 is provided inside the moving block 9. The measuring cylinder 15 is fixedly installed in the working groove 18, the fixed electrode 16 is fixedly installed in the measuring cylinder 15, and the movable electrode 17 is slidably installed in the measuring cylinder 15. The measuring cylinder 15 restricts the movement of the movable electrode 17, and the movable electrode 17 is arranged parallel to the fixed electrode 16. The reinforcing component amplifies and transfers the displacement of the measuring shaft 10 within the measuring hole into the displacement of the movable electrode 17 within the measuring cylinder 15. The recovery component drives the measuring shaft 10 to slide and reset within the measuring hole. In practice, the charge between the fixed electrode 16 and the movable electrode 17 changes synchronously with the capacitance under a constant voltage. The working principle is similar to that of a capacitive sensor in an electronic scale. The reinforcing component amplifies the displacement of the measuring shaft 10 within the measuring hole and then converts it into the movement displacement of the movable electrode 17, making the detection results more accurate. This allows for adjustment of the elevator guide rails, ensuring smooth operation of the elevator car.

[0035] like Figure 4As shown, the reinforcing assembly includes a traction rod 19, a moving wheel frame 20, moving wheels 21, fixed wheels 22, and a guide rope 23. The traction rod 19 is fixedly mounted on the measuring shaft 10. A sliding groove is provided in the moving block 9 to slide with the traction rod 19. The moving wheel frame 20 is slidably mounted in the working groove 18. The transverse section of the moving wheel frame 20 is connected to the traction rod 19. There are multiple moving wheels 21, all of which are rotatably mounted on the moving wheel frame 20. There are multiple fixed wheels 22, all of which are rotatably mounted in the working groove 18. One end of the guide rope 23 is fixedly mounted on the inner wall of the working groove 18, and the other end of the guide rope 23 passes sequentially around the multiple moving wheels 21 and fixed wheels 22. Wheel 22 is fixedly connected to movable electrode 17. In actual operation, when measuring shaft 10 moves laterally in measuring hole, measuring shaft 10 will drive traction rod 19 to move synchronously. Traction rod 19 drives moving wheel frame 20 to slide synchronously. Moving wheel frame 20 drives multiple moving wheels 21 to move synchronously. The distance between moving wheel 21 and fixed wheel 22 increases, pulling guide rope 23. Since one end of guide rope 23 remains unchanged, the other end of guide rope 23 pulls movable electrode 17 to slide in measuring cylinder 15. By detecting the change of charge between movable electrode 17 and fixed electrode 16, the offset of measuring wheel 7 is judged, thereby judging the skew of elevator guide rail.

[0036] like Figure 2 and Figure 3 As shown, the recovery assembly includes a return spring 25; the return spring 25 is located inside the measuring hole, and the two ends of the return spring 25 abut against the end of the measuring shaft 10 and the inner wall of the end of the measuring hole, respectively. The rebound action of the two return springs 25 drives the measuring shaft 10 to slide and reset, so that the measuring shaft 10 is in a zero state when it is not subjected to external force.

[0037] like Figure 4 As shown, a measuring spring 24 is also provided inside the measuring cylinder 15. The two ends of the measuring spring 24 abut against the inner wall of the measuring cylinder 15 and the movable electrode 17, respectively. The measuring spring 24 drives the movable electrode 17 to slide and reset inside the measuring cylinder 15, thereby facilitating continuous measurement of the elevator guide rail.

[0038] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A laser testing device for the straightness of elevator guide rails, characterized in that, The device includes a telescopic cylinder (1) and a telescopic rod (2). The end of the telescopic cylinder (1) is provided with a telescopic hole that can accommodate the telescopic rod (2). The telescopic rod (2) is slidably installed in the telescopic hole. A mounting block (3) is fixedly installed on one side of the telescopic cylinder (1). A laser emitter (4) is installed on the mounting block (3). A test frame (5) is installed on the telescopic rod (2). A through hole is provided on the test frame (5). A transparent sheet (6) is installed in the through hole. The beam of the laser emitter (4) irradiates and is perpendicular to the transparent sheet (6). The test frame (5) is rotatably mounted with a measuring wheel (7), which can roll along the elevator guide rail. The test frame (5) is also equipped with an offset measuring mechanism, which is used to detect the displacement of the measuring wheel (7) during the rolling process along the elevator.

2. The laser detection device for the straightness of elevator guide rails according to claim 1, characterized in that, The offset measuring mechanism includes a side block (8), a moving block (9), a measuring shaft (10), a lateral offset measuring component, and a longitudinal offset measuring component; the side block (8) is fixedly installed on the test frame (5), and a rolling groove is provided on the side block (8). The inner walls on both sides of the rolling groove are provided with moving grooves (11). The moving block (9) is located in the moving groove (11). The longitudinal offset measuring component is used to measure the offset displacement of the moving block (9) in the moving groove (11). Measuring holes are provided on the sides of the two moving blocks (9) that are close to each other. The two ends of the measuring shaft (10) are slidably inserted into the two measuring holes respectively. The lateral offset measuring component is used to measure the displacement of the measuring shaft (10) in the measuring holes. The measuring wheel (7) is mounted on the measuring shaft (10).

3. The laser detection device for the straightness of elevator guide rails according to claim 2, characterized in that, The longitudinal offset measuring component includes a constant force spring (12), a measuring rod (13), and a reset assembly; the side block (8) has multiple rotating slots, which are arranged in a ring array on the outer periphery of the moving slot (11). The number of constant force springs (12) is the same as the number of rotating slots and they are set one-to-one. The inner ring end of the constant force spring (12) is fixedly installed in the rotating slot. One end of the measuring rod (13) passes through the inner wall of the moving slot (11) and is connected to the outer ring end of the constant force spring (12). The end of the measuring rod (13) away from the constant force spring (12) abuts against the outer periphery of the moving block (9). The reset component is used to drive the moving block (9) to slide and reset within the moving slot (11).

4. The laser detection device for the straightness of elevator guide rails according to claim 3, characterized in that, The reset assembly includes multiple elastic telescopic rods (14); the multiple elastic telescopic rods (14) are arranged in a ring array on the outer periphery of the moving block (9), the elastic telescopic rods (14) are rotatably mounted on the inner ring wall of the moving groove (11), and the output shaft of the elastic telescopic rods (14) is rotatably connected to the outer periphery of the moving block (9).

5. A laser detection device for the straightness of elevator guide rails according to claim 2, characterized in that, The lateral offset measuring component includes a measuring cylinder (15), a fixed electrode (16), a movable electrode (17), a reinforcing component, and a recovery component; the moving block (9) has a working groove (18) inside, the measuring cylinder (15) is fixedly installed in the working groove (18), the fixed electrode (16) is fixedly installed in the measuring cylinder (15), the movable electrode (17) is slidably installed in the measuring cylinder (15), and the movable electrode (17) and the fixed electrode (16) are arranged in parallel; the reinforcing component can amplify and transfer the displacement of the measuring shaft (10) in the measuring hole into the displacement of the movable electrode (17) in the measuring cylinder (15); The recovery assembly is used to drive the measuring shaft (10) to slide and reset within the measuring hole.

6. The laser detection device for the straightness of elevator guide rails according to claim 5, characterized in that, The reinforcing assembly includes a traction rod (19), a moving wheel frame (20), moving wheels (21), fixed wheels (22), and a guide rope (23). The traction rod (19) is fixedly installed on the measuring shaft (10). The moving block (9) has a sliding groove that slides with the traction rod (19). The moving wheel frame (20) is slidably installed in the working groove (18). The transverse section of the moving wheel frame (20) is connected to the traction rod (19). There are multiple moving wheels (21), and all of the multiple moving wheels (21) are rotatably installed on the moving wheel frame (20). There are multiple fixed wheels (22), and all of the multiple fixed wheels (22) are rotatably installed in the working groove (18). One end of the guide rope (23) is fixedly installed on the inner wall of the working groove (18). The other end of the guide rope (23) passes around multiple moving wheels (21) and fixed wheels (22) in sequence and is fixedly connected to the movable electrode plate (17).

7. A laser detection device for the straightness of elevator guide rails according to claim 5, characterized in that, The recovery assembly includes a return spring (25); the return spring (25) is located inside the measuring hole, and the two ends of the return spring (25) abut against the end of the measuring shaft (10) and the inner wall of the end of the measuring hole, respectively.

8. A laser detection device for the straightness of elevator guide rails according to claim 5, characterized in that, The measuring cylinder (15) is also equipped with a measuring spring (24), and the two ends of the measuring spring (24) abut against the inner wall of the measuring cylinder (15) and the movable electrode (17), respectively.

9. A laser detection device for the straightness of elevator guide rails according to claim 1, characterized in that, The outer circumference of the measuring wheel (7) is provided with a semi-circular groove, the width of which is greater than the width of the elevator guide rail.

10. A laser detection device for the straightness of elevator guide rails according to claim 1, characterized in that, The bottom of the telescopic cylinder (1) is fixedly connected to the mounting base (26). The number of telescopic rods (2) is multiple, and the multiple telescopic rods (2) and the telescopic cylinder (1) form a multi-section telescopic rod, and the multiple transparent sheets (6) are arranged linearly.

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