A measuring device for installation clearance of a lift

Abstract

The present invention discloses a lifting elevator installation gap measuring device, which relates to the field of elevator measurement and solves the problem that it is difficult for the two vernier calipers on the existing gap measuring device to be in contact with the bottom of the elevator and the ground respectively, resulting in a suspension problem. It includes: a device housing and a mounting bracket. A fixing plate is installed inside the mounting bracket. A positioning measuring plate is installed at the bottom of the fixing plate. A measuring ruler is installed inside the mounting bracket. A moving block is slidably installed on the outside of the measuring ruler. A moving measuring plate is arranged at the bottom of the moving block. Two marking pens are arranged on the outside of the moving block. It further includes: a measuring mechanism for enabling the moving measuring plate to measure the bottom of the elevator at more heights. The measuring mechanism is installed at the top of the device housing. Through the measuring mechanism of the present invention, the moving measuring plate can move upward corresponding to the height of the bottom of the elevator, which is convenient for observing whether the moving measuring plate is aligned with the bottom of the elevator, improving the accuracy of the measuring ruler for measuring the installation gap of the elevator, and thus achieving the effect of accurate measurement.

Description

Technical Field

[0001] The present invention relates to the field of elevator measurement, and specifically to a measuring device for the installation clearance of a lifting elevator. Background Technique

[0002] A lifting elevator is a vertical transportation device mainly used to transport people or goods between different floors of a building. It is driven by an electric motor, which drives the car to move up and down on the guide rails to achieve fast and safe transportation. The elevator drives a steel wire rope or a hydraulic system through an electric motor to make the car and the counterweight move relative to each other on the guide rails. The control system schedules the elevator according to instructions, and the safety device provides protection in case of an emergency.

[0003] The elevator clearance refers to the gap between the elevator door and the elevator shaft wall, which is one of the important indicators of elevator safety. If the clearance between various components of the elevator is too large or too small, it may cause collisions, frictions or jams during operation, and even lead to serious accidents. By measuring the clearance, it can be ensured that the elevator will not have potential safety hazards due to improper clearance during operation. The existing clearance measuring devices usually use vernier calipers to measure the clearance between the elevator and the ground. Due to the deviation between the height of the elevator bottom and the ground, it is difficult for the two vernier calipers to contact the bottom of the elevator and the ground respectively, and there will be a suspended situation. It is easy for the visual observation of the staff to have deviations, affecting the accuracy of the clearance measurement. Summary of the Invention

[0004] The purpose of the present invention is to provide a measuring device for the installation clearance of a lifting elevator to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] A measuring device for the installation clearance of a lifting elevator, comprising: a device housing and a mounting bracket fixedly installed on the outside of the device housing. An fixing plate is fixedly installed on the inner side of the mounting bracket. A positioning measuring plate is fixedly installed at the bottom of the fixing plate. A measuring scale is fixedly installed on the inner side of the mounting bracket. The end of the positioning measuring plate and the starting end of the scale of the measuring scale are on the same vertical line. A moving block is slidably installed on the outside of the measuring scale. A moving measuring plate is arranged at the bottom of the moving block. Two symmetrically distributed marking pens are arranged on the outside of the moving block. The end of the marking pen and the moving measuring plate are on the same vertical line;

[0007] Also included are:

[0008] A measuring mechanism for improving the accuracy of the measuring scale in measuring the installation clearance of the elevator. The measuring mechanism is installed on the top of the device housing;

[0009] The piling mechanism is used to vertically position the device housing on the ground, and the piling mechanism is installed at the bottom of the device housing;

[0010] The marking mechanism enables the marker pen to mark on the surface of the measuring scale, and the marking mechanism is installed outside the marker pen.

[0011] Preferably, the measuring mechanism includes a first screw rod rotatably installed inside the mounting bracket. The moving block is matched with the first screw rod. Two symmetrically distributed first limiting rods are fixedly installed inside the mounting bracket. The first limiting rods slidably penetrate through the moving block. An elastic telescopic frame is fixedly installed between the moving block and the moving measuring plate. A transmission box is fixedly installed at the top of the device housing. A first transmission rod is rotatably installed inside the transmission box. An adjusting grip is rotatably installed on one side of the transmission box away from the mounting bracket. A second transmission rod is rotatably installed on the other side of the transmission box away from the adjusting grip. Conical gears are fixedly installed on the outer sides of the first transmission rod, the adjusting grip, and the second transmission rod. A synchronous belt is rotatably installed between the second transmission rod and the first screw rod.

[0012] Preferably, the piling mechanism includes an air extraction cylinder fixedly installed at the bottom of the device housing. A suction cup is fixedly installed at the bottom of the air extraction cylinder. A rubber piston is slidably installed inside the air extraction cylinder. A plurality of symmetrically distributed second limiting rods are fixedly installed at the top of the rubber piston. The second limiting rods slidably penetrate through the air extraction cylinder and extend to the inside of the device housing. A moving box is slidably installed inside the device housing. The moving box has an annular structure. A moving ring is arranged inside the moving box. A second screw rod matched with the moving ring is fixedly installed at the bottom end of the first transmission rod. The bottom end of the second screw rod is rotatably installed at the bottom of the device housing. A positioning component for stopping the movement of the moving ring is also arranged between the moving box and the moving ring.

[0013] Preferably, the marking mechanism includes a mounting block fixedly installed outside the moving block. The mounting block is slidably installed between the two first limiting rods. Two symmetrically distributed telescopic rods are fixedly installed at the bottom of the mounting block. A sleeve ring is fixedly installed at one end of the telescopic rod away from the mounting block. The sleeve ring is slidably installed outside the marker pen. Two symmetrically distributed retaining rings are fixedly installed outside the marker pen. A plurality of symmetrically distributed tension springs are fixedly installed between one side of the sleeve ring and the corresponding retaining ring. A sliding rod is fixedly installed outside the marker pen. A guiding groove for the sliding rod to be limited and slide is formed on the outside of the moving block. The bottom end of the guiding groove is of an inclined surface structure. A pull rod is fixedly installed on the outside of the telescopic rod. A sleeve block for the pull rod to be limited and slide is arranged on the outside of the mounting block.

[0014] Preferably, a U-shaped handle is fixedly installed on the outer side of the device housing, and an anti-slip sleeve is arranged on the outer side of the U-shaped handle.

[0015] Preferably, a spirit level is fixedly installed on the top of the mounting bracket.

[0016] Preferably, pulleys are fixedly installed on the side of the movable measuring plate away from the positioning measuring plate.

[0017] Preferably, the positioning assembly includes four plug blocks that are symmetrically distributed about the center and slidably installed inside the movable ring. A sliding cavity for the plug blocks to slide and be limited is formed inside the movable ring. A spring is fixedly installed between the sliding cavity and the plug blocks. The side of the plug block away from the spring is of an inclined surface structure. A slot for the plug blocks to be limited and inserted is formed inside the movable box. The pitch of the first screw is smaller than the pitch of the second screw.

[0018] Preferably, a plurality of third limiting rods that are symmetrically distributed about the center are fixedly installed between the two retaining rings, and the third limiting rods slidably penetrate through the collar.

[0019] Preferably, a convex ring is arranged at one end of the sliding rod away from the collar, and the convex ring is slidably installed in the guiding groove of the movable block.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0021] Through the measuring mechanism of the present invention, the positioning measuring plate can be brought into contact with the ground, and then the bottom end of the positioning measuring plate is brought into contact with the bottom of the elevator. The movable block drives the movable measuring plate to move along the outer side of the mounting bracket. The movable measuring plate can move upward correspondingly according to the height of the elevator bottom, which is convenient for accurately observing whether the movable measuring plate is aligned with the bottom of the elevator, improving the accuracy of the measuring scale for the installation gap of the elevator, and thus achieving the effect of accurate measurement.

[0022] Through the piling mechanism of the present invention, during the movement of the movable measuring plate, the rubber piston can move upward along the inside of the air extraction cylinder, quickly extracting the air between the suction cup and the ground, so that the device housing can be fixed on the ground, improving the convenience of elevator gap measurement and preventing skewing, and thus achieving the effect of fast and stable measurement.

[0023] Through the marking mechanism of the present invention, when the movable measuring plate moves to the edge of the elevator gap, the pull rod is pulled upward, so that the sliding rod moves along the guiding groove of the movable block, and the marker pen can contact the measuring scale and move upward to mark the measuring scale, so as to measure the next gap point of the elevator, and thus facilitating multi-point measurement of the elevator gap. Description of the Drawings

[0024] Figure 1 Schematic diagram of the overall structure of the present invention;

[0025] Figure 2 Schematic diagram of the mounting bracket and the moving block in the present invention;

[0026] Figure 3 Schematic diagram of the transmission box and the adjusting grip in the present invention;

[0027] Figure 4 Schematic diagram of the air pump and the suction cup in the present invention;

[0028] Figure 5 Schematic diagram of the insertion block and the moving box in the present invention;

[0029] Figure 6 Schematic diagram of the mounting block and the pull rod in the present invention;

[0030] Figure 7 Schematic diagram of the collar and the sliding rod in the present invention;

[0031] Figure 8 Schematic diagram of the marker pen and the retaining ring in the present invention.

[0032] In the figure: 1, device housing; 2, mounting bracket; 3, fixing plate; 4, positioning scale; 5, measuring ruler; 6, moving block; 7, moving scale; 8, marker pen; 9, first screw; 10, first limiting rod; 11, elastic telescopic frame; 12, transmission box; 13, first transmission rod; 14, adjusting grip; 15, second transmission rod; 16, bevel gear; 17, synchronous belt; 18, air pump; 19, suction cup; 20, rubber piston; 21, second limiting rod; 22, moving box; 23, moving ring; 24, second screw; 25, mounting block; 26, telescopic rod; 27, collar; 28, retaining ring; 29, tension spring; 30, sliding rod; 31, pull rod; 32, U-shaped handle; 33, spirit level; 34, insertion block; 35, spring; 36, third limiting rod; 37, pulley. Detailed implementation manners

[0033] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0034] Embodiment 1: Please refer to Figures 1-8, A lifting elevator installation clearance measuring device in the figure includes a device housing 1 and a mounting bracket 2 fixedly installed on the outside of the device housing 1. There is a right angle between the device housing 1 and the mounting bracket 2. A U-shaped handle 32 is fixedly installed on the outside of the device housing 1, and an anti-slip sleeve is arranged on the outside of the U-shaped handle 32, which is convenient for the staff to pick up the device housing 1. A spirit level 33 is fixedly installed on the top of the mounting bracket 2, and it can be judged whether the device housing 1 and the mounting bracket 2 are horizontal through the spirit level 33. A fixing plate 3 is fixedly installed on the inside of the mounting bracket 2, a positioning scale plate 4 is fixedly installed at the bottom of the fixing plate 3, a measuring scale 5 is fixedly installed on the inside of the mounting bracket 2, and the end of the positioning scale plate 4 and the starting end of the scale of the measuring scale 5 are on the same vertical line. The positioning scale plate 4 can be aligned with one end of the elevator clearance and indicate the starting end of the scale of the measuring scale 5. A moving block 6 is slidably installed on the outside of the measuring scale 5, a moving scale plate 7 is arranged at the bottom of the moving block 6, and two symmetrically distributed marking pens 8 are arranged on the outside of the moving block 6. The end of the marking pen 8 and the moving scale plate 7 are on the same vertical line. When the moving scale plate 7 is aligned with the other end of the elevator clearance, the position of the marking pen 8 indicating the scale of the measuring scale 5 is the length of the elevator clearance; further comprising: a measuring mechanism for improving the measurement accuracy of the measuring scale 5 for the elevator installation clearance, and the measuring mechanism is installed on the top of the device housing 1;

[0035] The measuring mechanism includes a first screw rod 9 rotatably installed inside the mounting bracket 2. The moving block 6 is matched with the first screw rod 9. Two symmetrically distributed first limiting rods 10 are fixedly installed inside the mounting bracket 2. The first limiting rods 10 slidably penetrate through the moving block 6. When the first screw rod 9 rotates, it can drive the moving block 6 to move horizontally along the outer sides of the measuring ruler 5 and the first limiting rods 10. An elastic telescopic frame 11 is fixedly installed between the moving block 6 and the moving measuring plate 7. A pulley 37 is fixedly installed on the side of the moving measuring plate 7 away from the positioning measuring plate 4, so that the moving measuring plate 7 can be in contact with the bottom of the elevator through the pulley 37, facilitating the movement of the moving measuring plate 7 on the bottom of the elevator. When the pulley 37 contacts the bottom of the elevator, due to the elasticity of the elastic telescopic frame 11, the moving measuring plate 7 can move upward correspondingly, enabling the moving measuring plate 7 to be applicable to elevators of more heights. A transmission box 12 is fixedly installed on the top of the device housing 1. A first transmission rod 13 is rotatably installed inside the transmission box 12. The first transmission rod 13 is vertically installed inside the transmission box 12. An adjusting grip 14 is rotatably installed on the side of the transmission box 12 away from the mounting bracket 2. A second transmission rod 15 is rotatably installed on the side of the transmission box 12 away from the adjusting grip 14. Matching bevel gears 16 are fixedly installed on the outer sides of the first transmission rod 13, the adjusting grip 14, and the second transmission rod 15. When the adjusting grip 14 is rotated, the second transmission rod 15 can be driven to rotate through the three bevel gears 16 and the first transmission rod 13. A synchronous belt 17 is rotatably installed between the second transmission rod 15 and the first screw rod 9, so that the second transmission rod 15 drives the first screw rod 9 to rotate through the synchronous belt 17, realizing the position adjustment of the moving measuring plate 7.

[0036] Embodiment 2: Please refer to Figures 1-5, This embodiment further elaborates on the first embodiment. The piling mechanism in the illustration includes an air extraction cylinder 18 fixedly installed at the bottom of the device housing 1. A suction cup 19 is fixedly installed at the bottom of the air extraction cylinder 18. A rubber piston 20 is slidably installed inside the air extraction cylinder 18. When the rubber piston 20 moves, it can extract the air between the suction cup 19 and the ground through the air extraction cylinder 18, causing the suction cup 19 to adsorb on the ground, and the device housing 1 can be stably fixed on the ground. A plurality of second limiting rods 21 distributed centrosymmetrically are fixedly installed at the top of the rubber piston 20. The second limiting rods 21 slidably penetrate through the air extraction cylinder 18 and extend to the inside of the device housing 1. The second limiting rods 21 provide guidance for the movement of the rubber piston 20 to prevent the rubber piston 20 from tilting during movement. A moving box 22 is slidably installed inside the device housing 1. The moving box 22 has an annular structure. A moving ring 23 is arranged inside the moving box 22. A second screw rod 24 cooperating with the moving ring 23 is fixedly installed at the bottom end of the first transmission rod 13. When the first transmission rod 13 rotates, it can drive the second screw rod 24 to rotate synchronously. When the second screw rod 24 rotates, it can drive the moving box 22 to rotate through the moving ring 23, so that the moving box 22 drives the rubber piston 20 to move along the inside of the air extraction cylinder 18 through the second limiting rods 21. The bottom end of the second screw rod 24 is rotatably installed at the bottom of the device housing 1. A positioning component for stopping the movement of the moving ring 23 is also arranged between the moving box 22 and the moving ring 23. The positioning component includes four insertion blocks 34 slidably installed inside the moving ring 23 and distributed centrosymmetrically. A sliding cavity for limiting the sliding of the insertion blocks 34 is opened inside the moving ring 23. A spring 35 is fixedly installed between the sliding cavity and the insertion blocks 34. The side of the insertion block 34 away from the spring 35 has an inclined surface structure. A slot for limiting the insertion of the insertion blocks 34 is opened inside the moving box 22. When the second screw rod 24 drives the moving ring 23 to rotate, using the elastic potential energy of the spring 35, the insertion blocks 34 are made to abut against the slots of the moving box 22, and the moving ring 23 can drive the moving box 22 to rotate synchronously, facilitating the moving box 22 to drive the rubber piston 20 to move through the second limiting rods 21. When the moving box 22 comes into contact with the bottom of the device housing 1, using the resistance of the device housing 1 to the moving box 22, the inclined surface of the insertion block 34 moves along the slot inside the moving box 22, and the insertion block 34 compresses the spring 35 and retracts into the sliding cavity of the moving ring 23. The pitch of the first screw rod 9 is smaller than the pitch of the second screw rod 24, making the moving speed of the moving box 22 greater than the moving speed of the moving plate 7, facilitating the suction cup 19 to quickly adsorb on the ground.

[0037] Embodiment Three: Please refer to Figure 2 , Figure 7 and Figure 8, this embodiment further illustrates other embodiments. The marking mechanism in the figure includes a mounting block 25 fixedly installed on the outside of the moving block 6. The mounting block 25 is slidably installed between two first limiting rods 10. When the moving block 6 moves, it can drive the mounting block 25 to move along the outside of the two first limiting rods 10. Two symmetrically distributed telescopic rods 26 are fixedly installed at the bottom of the mounting block 25. The mounting block 25 can drive the telescopic rods 26 to move synchronously. A collar 27 is fixedly installed at the end of the telescopic rod 26 away from the mounting block 25. The collar 27 is slidably installed on the outside of the marker pen 8. The telescopic rod 26 can drive the marker pen 8 to move synchronously through the collar 27. Two symmetrically distributed retaining rings 28 are fixedly installed on the outside of the marker pen 8. A plurality of centrally symmetrically distributed tension springs 29 are fixedly installed between one side of the collar 27 and the corresponding retaining ring 28. A plurality of centrally symmetrically distributed third limiting rods 36 are fixedly installed between the two retaining rings 28. The third limiting rods 36 slidably penetrate through the collar 27, enabling the collar 27 to move smoothly along the outside of the marker pen 8. A sliding rod 30 is fixedly installed on the outside of the marker pen 8. A guiding groove for the sliding rod 30 to be limited and slide is formed on the outside of the moving block 6. The bottom end of the guiding groove is of an inclined surface structure. When the collar 27 moves upward, it can drive the sliding rod 30 on the marker pen 8 to move upward along the guiding groove. When the sliding rod 30 moves along the inclined surface of the guiding groove, the marker pen 8 can move horizontally along the outside of the collar 27, making the marker pen 8 contact the outside of the measuring ruler 5. When the sliding rod 30 moves along the vertical end of the guiding groove, the marker pen 8 can mark on the measuring ruler 5. A convex ring is provided at the end of the sliding rod 30 away from the collar 27. The convex ring is slidably installed in the guiding groove of the moving block 6, improving the smoothness of the movement of the sliding rod 30 and preventing the sliding rod 30 from sliding out of the guiding groove. A pull rod 31 is fixedly installed on the outside of the telescopic rod 26. The pull rod 31 can pull the telescopic rod 26 to contract upward, thereby pulling the collar 27 to move upward. A sleeve block for the pull rod 31 to be limited and slide is provided on the outside of the mounting block 25, improving the smoothness of the movement of the pull rod 31.

[0038] Working principle: First, the staff places the suction cup 19 on the ground, aligns the bottom end of the positioning template 4 with one end of the elevator gap, and makes the pulley 37 on the moving template 7 contact the bottom of the elevator. Utilizing the elasticity of the elastic telescopic frame 11, the corresponding moving template 7 moves upward. At this time, the staff rotates the adjusting grip 14. The adjusting grip 14 drives the first transmission rod 13 to rotate through the bevel gear 16 on its outer side and the bevel gear 16 on the outer side of the first transmission rod 13. The first transmission rod 13 drives the moving ring 23 to rotate through the first screw rod 9. Utilizing the elastic potential energy of the spring 35, the insert block 34 in the sliding cavity of the moving ring 23 drives the moving box 22 to rotate. Under the limitation of multiple second limiting rods 21, the moving box 22 pulls the rubber piston 20 to move along the inner side of the air extraction cylinder 18 through the second limiting rods 21, extracting the air between the suction cup 19 and the ground, so that the suction cup 19 is adsorbed and fixed on the ground, and the device housing 1 is firmly fixed on the ground. When the bottom of the moving box 22 contacts the bottom of the device housing 1, due to the resistance of the bottom of the device housing 1 to the moving box 22, the inclined surface of the insert block 34 moves along the slot of the moving box 22, and the insert block 34 compresses the spring 35 and retracts into the sliding cavity of the moving ring 23. The second screw rod 24 drives the moving ring 23 to continue rotating and keeps the position of the moving box 22. At the same time, the first transmission rod 13 drives the second transmission rod 15 to rotate through the bevel gear 16. The second transmission rod 15 drives the first screw rod 9 to rotate through the synchronous belt 17. The first screw rod 9 drives the moving block 6 to move horizontally along the outer sides of the two first limiting rods 10 and the measuring scale 5. The moving block 6 drives the mounting block 25 and the elastic telescopic frame 11 to move synchronously. The elastic telescopic frame 11 drives the pulley 37 on the moving template 7 to move along the bottom of the elevator, so that the bottom end of the moving template 7 is aligned with the other end of the elevator gap. At this time, the marker pen 8 is aligned with the scale on the measuring scale 5. Finally, the staff pulls the pull rod 31 upward, causing the bottom end of the telescopic rod 26 driven by the pull rod 31 to contract upward. The telescopic rod 26 drives the collar 27 to move synchronously, so that the collar 27 drives the marker pen 8 to move synchronously. The sliding rod 30 on the marker pen 8 moves along the inclined surface at the bottom end of the guiding groove on the moving block 6, enabling the sliding rod 30 to drive the marker pen 8 to move along the inner side of the collar 27. The marker pen 8 pulls the tension spring 29 through the retaining ring 28, enabling the marker pen 8 to contact the outer side of the measuring scale 5. When the sliding rod 30 moves along the vertical end of the guiding groove, the marker pen 8 can draw a straight line mark on the measuring scale 5. The staff can obtain the elevator gap through the mark on the measuring scale 5. Moreover, when the staff releases the pull rod 31, utilizing the resilience of the tension spring 29 and the gravity of the marker pen 8, the marker pen 8 resets downward and moves away from the measuring scale 5, facilitating the measurement and marking of the next measurement point, facilitating the processing and measurement of multiple gap points of the elevator, and judging whether there are deviations, thereby improving the accuracy and convenience of elevator measurement.

[0039] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, such that a process, method, article, or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or device.

[0040] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for measuring the installation gap of a lifting elevator, characterized in that: include: The device housing and the mounting bracket are provided with a fixing plate installed on the inner side of the mounting bracket, a positioning plate is installed on the bottom of the fixing plate, a measuring ruler is installed on the inner side of the mounting bracket, a moving block is slidably installed on the outer side of the measuring ruler, a moving plate is provided at the bottom of the moving block, and two marking pens are provided on the outer side of the moving block; Also includes: A measuring mechanism, which is installed on the top of the device housing, comprises a first screw installed on the inner side of the mounting bracket, a moving block cooperates with the first screw, two first limit rods are fixedly installed on the inner side of the mounting bracket, the first limit rod slides through the moving block, an elastic telescopic frame is fixedly installed between the moving block and the moving plate, a transmission box is installed on the top of the device housing, a first transmission rod is installed on the inner side of the transmission box, an adjustment handle is installed on one side of the transmission box, a second transmission rod is installed on one side of the transmission box, matching bevel gears are fixedly installed on the outer sides of the first transmission rod, the adjustment handle and the second transmission rod, and a synchronous belt is rotatably installed between the second transmission rod and the first screw; The fixing mechanism is installed at the bottom of the device shell, and the fixing mechanism includes a vacuum cylinder installed at the bottom of the device shell, a suction cup is installed at the bottom of the vacuum cylinder, a rubber piston is slidably installed on the inner side of the vacuum cylinder, and a plurality of second limit rods are fixedly installed on the top of the rubber piston, a moving box is installed on the inner side of the device shell, a moving ring is arranged on the inner side of the moving box, a second screw matched with the moving ring is fixedly installed on the bottom end of the first transmission rod, and a positioning component for stopping the movement of the moving ring is also arranged between the moving box and the moving ring, the positioning component includes four plug-in blocks slidably installed on the inner side of the moving ring, a spring is fixedly installed between the inner plug-in blocks of the moving ring, one side of the plug-in block is an inclined structure, a slot for the plug-in block to be limited and plugged is opened on the inner side of the moving box, and the pitch of the first screw is smaller than the pitch of the second screw; The marking mechanism is installed on the outside of the marker pen. The marking mechanism includes a mounting block installed on the outside of the moving block. Two telescopic rods are fixedly installed on the bottom of the mounting block. A ring is fixedly installed on one end of the telescopic rod. The ring is slidably installed on the outside of the marker pen. Two retaining rings are fixedly installed on the outside of the marker pen. A plurality of tension springs are fixedly installed on one side of the ring. A sliding rod is fixedly installed on the outside of the marker pen. A guide groove for limiting the sliding of the sliding rod is opened on the outside of the moving block. The bottom end of the guide groove is a slope structure. A pull rod is fixedly installed on the outside of the telescopic rod.

2. The device for measuring the installation gap of an elevator according to claim 1, characterized in that: A U-shaped handle is fixedly installed on the outer side of the device shell.

3. The device for measuring the installation gap of an elevator according to claim 1, characterized in that: A level ruler is fixedly installed on the top of the mounting bracket.

4. The device for measuring the installation gap of an elevator according to claim 1, characterized in that: A pulley is fixedly installed on one side of the moving measuring plate.

5. The device for measuring the installation gap of an elevator according to claim 1, characterized in that: A plurality of third limiting rods are fixedly installed between the two retaining rings, and the third limiting rods slide through the sleeve rings.

6. The device for measuring the installation gap of an elevator according to claim 1, characterized in that: One end of the slide rod is provided with a convex ring, which is slidably installed in the guide groove of the moving block.

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