Elevator door change gear detection equipment with relatively high stability

Abstract

The invention relates to the technical field of elevator door change gear detection, in particular to high-stability elevator door change gear detection equipment which comprises a driving motor and a driving shaft, an inner supporting column is arranged in the driving shaft, and a limiting piece is arranged on the inner supporting column. According to the elevator door change gear detection equipment with high stability, through linkage of the first end block, the second end block and the third end block, when the first end block and the second end block are located in the second connecting section, the part, protruding out of the sliding opening, of the third end block is used for blocking an elevator door change gear; the first end block, the second end block and the third end block can abut against the inner hole face of the elevator door change gear after resetting, so that the elevator door change gear is clamped and positioned, and the stability of the elevator door change gear during detection is kept.

Description

Technical Field

[0001] The present invention relates to the technical field of elevator door pulley detection, and in particular to an elevator door pulley detection device with high stability. Background Art

[0002] The elevator door pulley is mainly used to guide the opening and closing of the elevator door. It opens or closes the elevator door by rolling. As an important structural component supporting the opening and closing movement of the elevator car door, the service life of the elevator door pulley is closely related to whether the elevator door switch is safe and reliable. Therefore, the elevator door pulley needs to be life tested before use.

[0003] Chinese patent application CN119394638A discloses an elevator door pulley detection device that solves the problem of automatically replacing elevator door pulleys while being suitable for simultaneous detection of elevator door pulleys of various sizes. The device comprises a cabinet and a drive motor. The drive motor is fixedly mounted in the middle of the cabinet, the output end of the drive motor is fixedly mounted with an output shaft, and the outer wall of the output shaft is fixedly mounted with a plurality of drive wheels, each of which is evenly spaced. The present invention can automatically adjust the height of the elevator door pulley seat, making it suitable for use with elevator door pulleys of various diameters. The device facilitates simultaneous detection of elevator door pulleys of different sizes. The replacement box of the device can automatically replace the elevator door pulley when the elevator door pulley is detected, eliminating the need for manual operation. This improves the detection efficiency of the device while ensuring safety.

[0004] When the above-mentioned device detects the elevator door pulleys, the two elevator door pulleys need to be installed on the entire drive shaft, and then the drive motor is used to drive the shaft to rotate to complete the detection work. From the installation operation level, this process is extremely tedious and complicated. Each time a drive shaft is installed, technicians must first use professional tools to unscrew the fixing bolts, and then carefully remove the entire drive shaft from the equipment. This process is not only time-consuming and labor-intensive, but also requires the operator to have certain skills and experience, otherwise the drive shaft or surrounding components may be easily damaged. After the installation is completed, the above steps must be repeated in reverse to reinstall the drive shaft back into the equipment. The overall disassembly and assembly process often takes a lot of time, which seriously affects the efficiency of the inspection work. Moreover, when two elevator door pulleys are installed on the drive shaft for inspection at the same time, even if one of the elevator door pulleys has successfully completed all the inspection items, it cannot be removed immediately. It is necessary to wait for the other elevator door pulley to be inspected before the disassembly operation can be carried out. This causes the inspection equipment to be idle and waiting for a considerable period of time, which greatly reduces the equipment's utilization efficiency and the inspection capacity per unit time. Especially when the batch inspection task is heavy, this disadvantage is more prominent, which seriously restricts the overall progress of the inspection work.

[0005] Therefore, the present invention provides an elevator door pulley detection device with high stability to solve the above problems. Summary of the Invention

[0006] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides an elevator door pulley detection device with higher stability to solve the problem that the repeated disassembly and assembly of the drive shaft is cumbersome and easily reduces the detection efficiency. In addition, when the drive shaft is equipped with two elevator door pulleys for detection, even if one is completed for detection, it cannot be removed immediately and must wait until the other is completed before it can be disassembled, resulting in reduced equipment utilization efficiency and detection capacity.

[0007] In order to achieve the above object, the technical solution adopted by the present invention is: A highly stable elevator door pulley detection device includes a machine platform, wherein a drive assembly is provided inside the machine platform, the drive assembly includes a drive motor and a drive shaft, the drive shaft includes a first connecting section, a second connecting section, and a third connecting section, the second connecting section is detachable between the first connecting section and the third connecting section, and both ends of the drive motor are connected to the adjacent third connecting section via a coupling; The clamping assembly is arranged inside the second connecting section. The clamping assembly includes an inner support column installed inside the second connecting section. A cavity is opened inside the second connecting section. Both ends of the second connecting section are provided with positioning holes adapted to the inner support column, and the positioning holes are connected to the interior of the second connecting section. The outer surface of the inner support column is fixed on the inner wall of the corresponding positioning hole. The surface of the inner support column is provided with a plurality of equally spaced limit members for clamping and limiting the elevator door hanging wheel.

[0008] Preferably, the limiting member consists of a first end block, a second end block and a third end block, the first end block is arc-shaped, and one side of the second end block and the third end block are fixed on the outer arc surface of the corresponding first end block, the height of the third end block is higher than the second end block, and an accommodating gap is limited between the second end block and the third end block, and the accommodating gap is used to accommodate the elevator door hanging wheel.

[0009] Preferably, the outer wall of the third connecting section is provided with a plurality of sliding openings arranged at equal distances and adapted to the limiting member, and the limiting member is slidably connected to the inside of the sliding opening, and a first side plate is fixed on both sides of one end of the limiting member located inside the limiting member, and a first return spring is fixed between the side of the first side plate facing the corresponding limiting member and the inner wall of the second connecting section.

[0010] Preferably, the limiting member is located on one side inside the second connecting section and a limiting shaft is fixed thereon, the outer wall of the inner support column is provided with a limiting groove adapted to the limiting shaft, and the limiting shaft is inserted into the corresponding limiting groove, and the limiting shaft cooperates with the limiting groove to limit the limiting member.

[0011] Preferably, a linkage component is provided inside the second connecting section, and the linkage component includes two second side plates fixed on one side of the limit member, and a movable area is restricted between the two second side plates. A linkage plate is provided inside the movable area, and a driving shaft is fixed between the two second side plates. A sliding rail adapted to the driving shaft is provided on the linkage plate, and the driving shaft is slidably connected to the inside of the sliding rail.

[0012] Preferably, a pull plate is fixed on one side of the linkage plate, a first accommodating groove adapted to the pull plate is opened on the outer wall of the inner support column, and the pull plate is slidably connected to the corresponding first accommodating groove, and a second return spring is fixed between one side of the pull plate and the inner wall of the first accommodating groove.

[0013] Preferably, an adjustment component is provided on the inner support column, and the adjustment component includes a sliding shaft slidably connected to the inside of the inner support column, a second accommodating groove adapted to the sliding shaft is opened on the inner support column, and the sliding shaft is slidably connected to the inside of the second accommodating groove, and a third return spring is fixed between one end of the sliding shaft and the inner wall of the second accommodating groove.

[0014] Preferably, through holes adapted to the sliding shaft are provided at both ends of the inner support column, and the outer wall of the sliding shaft is slidably connected to the inner wall of the corresponding through hole, a first plug-in block is fixed to the outer wall of one end of the sliding shaft extending out of the through hole, and an accommodating slot adapted to the first plug-in block is provided on the first connecting section and the third connecting section, and the first plug-in block of the sliding shaft is inserted into the corresponding accommodating slot.

[0015] Preferably, a plug is provided on one side of the pull plate, and a connecting hole adapted for the plug is opened on one side of the pull plate, and the plug is slidably connected to the inside of the connecting hole, and a connecting disk is fixed on the outer wall of one end of the plug extending out of the connecting hole, and a fourth reset spring is fixed between the connecting disk and the pull plate, and a positioning groove adapted for the plug is opened on the sliding shaft, and the plug can be inserted into the inside of the positioning groove.

[0016] Preferably, the slide rail is inclined and has a head end and a tail end, the head end of the slide rail is close to the linkage plate, the tail end of the slide rail is away from the linkage plate, and the initial position of the driving shaft is located at the head end of the slide rail.

[0017] The beneficial effects of the present invention are: 1. The drive motor drives the drive shaft to rotate, simulating the actual motion state of the elevator door pulley after installation, so that the detection mechanism can detect the performance of the elevator door pulley during operation. Compared with static detection, it is more in line with the actual working conditions and ensures the accuracy of the test results. In addition, the segmented drive shaft (first / second / third connecting sections) can realize the rapid disassembly and assembly of the elevator door pulley.

[0018] 2. Through the linkage of the first end block, the second end block and the third end block, when the first end block and the second end block are located inside the second connecting section, the protruding sliding portion of the third end block is used to block the elevator door hanging wheel, so that when the staff places the elevator door hanging wheel on the second connecting section, it can be automatically positioned, which is convenient for the installation of the elevator door hanging wheel. When the first end block, the second end block and the third end block are reset, they can be against the inner hole surface of the elevator door hanging wheel, thereby clamping and positioning the elevator door hanging wheel, and maintaining the stability of the elevator door hanging wheel during detection.

[0019] 3. Through the oblique sliding design of the slide rail and the push shaft, and the linkage between the pull plate and the first return spring, the limiter can be automatically extended and retracted. The clamping positioning can be quickly completed when the pulley is installed, and the clamping force is provided by the return spring to ensure that the position of the pulley is stable during the detection process, reducing the number of manual adjustment steps. In addition, the cooperation of the slide rail, the push shaft and the first return spring enables the limiter to automatically adapt and clamp to elevator door pulleys with different apertures, thereby facilitating the installation and detection of elevator door pulleys with different diameters.

[0020] 4. The combination of the sliding shaft, insert, and insert column allows for quick installation and removal of the second connecting section, the first connecting section, and the third connecting section, facilitating installation and removal of the elevator door pulley. Once the inspection is complete, the next elevator door pulley can be quickly replaced, shortening the inspection cycle and improving overall work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is a structural schematic diagram of the drive assembly of the present invention; Figure 3 It is a structural schematic diagram of the drive shaft of the present invention; Figure 4 It is a schematic structural diagram of a first three-dimensional cross section of the drive shaft of the present invention; Figure 5 It is a structural schematic diagram of the clamping assembly of the present invention; Figure 6 Schematic diagram of the structure of the linkage assembly of the present invention.

[0022] Figure 7 It is a structural schematic diagram of the first three-dimensional cross-section of the sliding shaft of the present invention.

[0023] Figure 8 It is a schematic structural diagram of the matching between the plug post and the sliding shaft of the present invention.

[0024] In the picture: 10. Machine; 11. Control box; 20. Drive assembly; 21. Drive motor; 22. Drive shaft; 220. First connecting section; 221. Second connecting section; 222. Third connecting section; 30. Clamping assembly; 31. Inner support column; 32. Positioning hole; 33. Limiting member; 34. Sliding opening; 35. First side plate; 36. First return spring; 37. Limiting shaft; 38. Limiting slot; 40. Linkage assembly; 41. Second side plate; 42. Linkage plate; 43. Push shaft; 44. Slide rail; 45. Pull plate; 46. First receiving slot; 47. Second return spring; 50. Adjustment assembly; 51. Sliding shaft; 52. Second accommodating slot; 53. Third return spring; 54. First plug-in block; 55. Accommodating slot; 56. Insertion column; 57. Connecting plate; 58. Fourth return spring; 59. Positioning slot. DETAILED DESCRIPTION

[0025] The following will describe various embodiments of the present invention in detail with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0026] As attached Figures 1-8 As shown, a highly stable elevator door pulley detection device, The machine comprises a platform 10, on which a control box 11 and a detection mechanism are installed. The control box 11 controls the opening and closing states of the detection mechanism, thereby detecting the performance of the elevator door pulley. In this embodiment, the detection mechanism is an existing mechanism and will not be described again.

[0027] A driving assembly 20 is mounted on the machine platform 10 for driving the elevator door hanging wheel to rotate to simulate the movement during installation, so that the detection mechanism can detect the performance of the elevator door hanging wheel during operation.

[0028] The drive assembly 20 includes a drive motor 21, which is installed on the top of the control box 11. One side of the drive motor 21 is installed on the front wall of the machine platform 10. Both ends of the drive motor 21 are installed with drive shafts 22 through couplings, and both ends of the drive shaft 22 are installed on the rib walls on both sides of the machine platform 10. An elevator door pulley is installed on the drive shaft 22. When the output end of the drive motor 21 drives the drive shaft 22 to rotate, the detection mechanism can detect the elevator door pulley.

[0029] The drive shaft 22 includes a first connecting section 220, a second connecting section 221 and a third connecting section 222. The second connecting section 221 is installed between the first connecting section 220 and the third connecting section 222. The first connecting section 220 and the third connecting section 222 are both installed on the rib wall of the machine 10 through an installer, and the output end of the drive motor 21 is connected to the adjacent third connecting section 222.

[0030] A clamping assembly 30 is installed on the drive shaft 22 for clamping and limiting the elevator door pulley, thereby facilitating the elevator door pulley to be detected by the detection mechanism, and the clamping assembly 30 can clamp and limit elevator door pulleys of different diameters, thereby improving the detection performance of the elevator door pulley.

[0031] The clamping assembly 30 includes an inner support column 31 installed inside the second connecting section 221, a cavity is opened inside the second connecting section 221, and positioning holes 32 adapted to the inner support column 31 are opened at both ends of the second connecting section 221, and the positioning holes 32 are connected to the interior of the second connecting section 221, and the outer surface of the inner support column 31 is fixed on the inner wall of the corresponding positioning hole 32, which is used to support the inner support column 31, thereby maintaining the stability of the inner support column 31.

[0032] A plurality of equidistantly arranged limiting members 33 are provided on the surface of the inner support column 31 . The plurality of limiting members 33 are arranged in a ring shape on the inner support column 31 .

[0033] The limiting member 33 consists of a first end block, a second end block and a third end block. The first end block is arc-shaped, and one side of the second end block and the third end block are fixed on the outer arc surface of the corresponding first end block. The height of the third end block is higher than the second end block. An accommodating gap is limited between the second end block and the third end block, and the accommodating gap is used to accommodate the elevator door hanging wheel.

[0034] The outer wall of the third connecting section 222 is provided with a plurality of sliding openings 34 arranged at equal distances and adapted to the limiting member 33, and the limiting member 33 is slidably connected to the inside of the sliding opening 34, and the first side plates 35 are fixed on both sides of one end of the limiting member 33 located inside the limiting member 33, and a first return spring 36 is fixed between the side of the first side plate 35 facing the corresponding limiting member 33 and the inner wall of the second connecting section 221 for supporting the limiting member 33, thereby facilitating the return of the limiting member 33.

[0035] A limiting shaft 37 is fixed on one side of the limiting member 33 located inside the second connecting section 221, and a limiting groove 38 is provided on the outer wall of the inner support column 31 to match the limiting shaft 37, and the limiting shaft 37 is inserted into the corresponding limiting groove 38. The limiting shaft 37 cooperates with the limiting groove 38 to limit the limiting member 33, thereby maintaining the stability of the limiting member 33 during sliding.

[0036] A linkage assembly 40 is provided inside the second connecting section 221 for driving the limiting member 33 to clamp elevator door pulleys of different diameters, thereby improving the detection performance of the elevator door pulleys.

[0037] The linkage assembly 40 includes two second side plates 41 fixed on one side of the limit member 33, and a movable area is limited between the two second side plates 41. A linkage plate 42 is arranged inside the movable area, and a driving shaft 43 is fixed between the two second side plates 41. A slide rail 44 adapted to the driving shaft 43 is provided on the linkage plate 42, and the driving shaft 43 is slidably connected to the inside of the slide rail 44.

[0038] The slide rail 44 is inclined and has a head end and a tail end. The head end of the slide rail 44 is close to the linkage plate 42 , and the tail end of the slide rail 44 is away from the linkage plate 42 . The initial position of the driving shaft 43 is located at the head end of the slide rail 44 .

[0039] A pull plate 45 is fixed to one side of the linkage plate 42, and a first accommodating groove 46 adapted to the pull plate 45 is provided on the outer wall of the inner support column 31, and the pull plate 45 is slidably connected to the corresponding first accommodating groove 46. A second reset spring 47 is fixed between one side of the pull plate 45 and the inner wall of the first accommodating groove 46 for supporting the pull plate 45, thereby facilitating the reset of the pull plate 45.

[0040] When the elevator door hanging wheel is installed, since each second connecting section 221 has two inner support columns 31 inside, and the initial position of the pushing shaft 43 is at the head end of the slide rail 44, pushing the pull plate 45, at this time the pull plate 45 slides toward and compresses it, and the pushing shaft 43 slides from the head end of the slide rail 44 to its tail end, and the pushing shaft 43 drives the limit member 33 to slide toward the inside of the second connecting section 221 through the second side plate 41. When the pushing shaft 43 slides to the tail end of the slide rail 44, the first end block and the second end block both slide into the inside of the second connecting section 221, and the third end block does not completely enter the inside of the second connecting section 221 and partially protrudes from the outside of the sliding mouth 34. Then the elevator door hanging wheel to be tested passes through the hole in the middle thereof through one end of the second connecting section 221 and is placed on the surface of the second connecting section 221. Since the third end block protrudes from the sliding mouth 34, it can block the elevator door hanging wheel.

[0041] When the side of the elevator door hanging wheel is against the side wall of the third end block, the position of the elevator door hanging wheel no longer changes, and then the pull plate 45 is released, and the second return spring 47 in the compressed state is reset, and the pull plate 45 drives the push shaft 43 to slide along the track of the slide rail 44 through the linkage plate 42. At this time, the push shaft 43 slides from the tail end of the slide rail 44 to its head end, and the push shaft 43 drives the limit member 33 to slide out of the slide 34 again through the second side plate 41 to reset. At this time, the first end block, the second end block and the third end block all slide out of the slide 34, and the inner surface of the elevator door hanging wheel is located in the accommodating space The inside of the gap makes the second end block cooperate with the third end block to clamp and limit the elevator door hanging wheel, thereby stabilizing the position of the elevator door hanging wheel, and through the drive of the second return spring 47, the sliding position of the push shaft 43 inside the slide rail 44 can be controlled, so that the limit member 33 can be adjusted to adapt to the inner holes of different elevator door hanging wheels, thereby achieving the clamping and limiting of elevator door hanging wheels with different inner hole diameters. After the clamping is completed, the second connecting segment 221 is installed on the first connecting segment 220 and the third connecting segment 222, so that the performance of the elevator door hanging wheel is detected by using the detection mechanism to obtain the detection mechanism.

[0042] An adjustment assembly 50 is provided on the inner support column 31 to facilitate the disassembly and assembly of the elevator door pulley, thereby improving the detection efficiency of the elevator door pulley.

[0043] The adjustment component 50 includes a sliding shaft 51 slidably connected to the inside of the inner support column 31. A second accommodating groove 52 adapted to the sliding shaft 51 is provided on the inner support column 31, and the sliding shaft 51 is slidably connected to the inside of the second accommodating groove 52, which is used to limit the sliding shaft 51 so as to maintain the stability of the sliding shaft 51 when sliding. A third reset spring 53 is fixed between one end of the sliding shaft 51 and the inner wall of the second accommodating groove 52, which is used to support the sliding shaft 51, thereby facilitating the reset of the sliding shaft 51.

[0044] Through holes adapted to the sliding shaft 51 are provided at both ends of the inner support column 31, and the outer wall of the sliding shaft 51 is slidably connected to the inner wall of the corresponding through hole. A first plug-in block 54 is fixed to the outer wall of one end of the sliding shaft 51 extending out of the through hole, and an accommodating slot 55 adapted to the first plug-in block 54 is provided on the first connecting section 220 and the third connecting section 222, and the first plug-in block 54 of the sliding shaft 51 is inserted into the corresponding accommodating slot 55.

[0045] A plug post 56 is provided on one side of the pull plate 45, and a connecting hole adapted for the plug post 56 is opened on one side of the pull plate 45, and the plug post 56 is slidably connected to the inside of the connecting hole, and a connecting disk 57 is fixed on the outer wall of one end of the plug post 56 extending out of the connecting hole, and a fourth return spring 58 is fixed between the connecting disk 57 and the pull plate 45, and a positioning groove 59 adapted for the plug post 56 is opened on the sliding shaft 51, and the plug post 56 can be inserted into the inside of the positioning groove 59.

[0046] When the second connecting section 221 is installed on the first connecting section 220 and the third connecting section 222, the connecting plate 57 is pressed, and the connecting plate 57 drives the plug post 56 to slide toward the sliding shaft 51 and insert it into the interior of the positioning groove 59. Then the staff pulls the pull plate 45 to slide toward the second return spring 47, and the plug post 56 drives the sliding shaft 51 to slide in the second accommodating groove 52 and compresses the third return spring 53. At this time, the sliding shaft 51 drives the first plug block 54 to slide toward the inner support column 31, and then the second connecting section 221 is placed between the first connecting section 220 and the third connecting section 222, and after aligning the position of the first plug block 54 and the accommodating slot 55, release the pull plate 45, and the third return spring 53 in the compressed state is reset, and the first plug block 54 of the sliding shaft 51 is inserted into the interior of the accommodating slot 55, thereby completing the installation of the second connecting section 221, and then release the connecting plate 57 to release the limit of the sliding shaft 51 by the plug post 56.

[0047] When the elevator door hanging wheel is disassembled after inspection, the above operation is repeated to release the clamping condition of the elevator door hanging wheel, and then the elevator door hanging wheel is removed, so that the subsequent installation and inspection of the elevator door hanging wheel can be carried out again.

[0048] Thus far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art may make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will fall within the scope of protection of the present invention.

Claims

1. An elevator door pulley detection device with high stability, comprising a machine platform (10), characterized in that: A driving assembly (20) is provided inside the machine (10), the driving assembly (20) includes a driving motor (21) and a driving shaft (22), the driving shaft (22) includes a first connecting section (220), a second connecting section (221) and a third connecting section (222), the second connecting section (221) is detachable between the first connecting section (220) and the third connecting section (222), and both ends of the driving motor (21) are connected to the adjacent third connecting section (222) through a coupling; A clamping assembly (30) is provided inside the second connecting section (221), and the clamping assembly (30) includes an inner support column (31) installed inside the second connecting section (221). A cavity is provided inside the second connecting section (221), and positioning holes (32) are provided at both ends of the second connecting section (221) to match the inner support column (31), and the positioning holes (32) are connected to the interior of the second connecting section (221), and the outer surface of the inner support column (31) is fixed on the inner wall of the corresponding positioning hole (32), and a plurality of equidistantly arranged limiting members (33) are provided on the surface of the inner support column (31) for clamping and limiting the elevator door hanging wheel.

2. The elevator door pulley detection device with high stability according to claim 1 is characterized in that: The limiting member (33) is composed of a first end block, a second end block and a third end block, the first end block is arc-shaped, and one side of the second end block and the third end block are fixed on the outer arc surface of the corresponding first end block, the height of the third end block is higher than the second end block, and an accommodating gap is limited between the second end block and the third end block, and the accommodating gap is used to accommodate the elevator door hanging wheel.

3. The elevator door pulley detection device with high stability according to claim 1 is characterized in that: The outer wall of the third connecting section (222) is provided with a plurality of sliding openings (34) arranged at equal distances and adapted to the limiting member (33), and the limiting member (33) is slidably connected to the inside of the sliding opening (34), and a first side plate (35) is fixed on both sides of one end of the limiting member (33) located inside the limiting member (33), and a first return spring (36) is fixed between the side of the first side plate (35) facing the corresponding limiting member (33) and the inner wall of the second connecting section (221).

4. The elevator door pulley detection device with high stability according to claim 1 is characterized in that: The limiting member (33) is located on one side inside the second connecting section (221) and a limiting shaft (37) is fixed thereon. The outer wall of the inner support column (31) is provided with a limiting groove (38) adapted to the limiting shaft (37), and the limiting shaft (37) is inserted into the corresponding limiting groove (38). The limiting shaft (37) cooperates with the limiting groove (38) to limit the limiting member (33).

5. The elevator door pulley detection device with high stability according to claim 3 is characterized in that: A linkage assembly (40) is provided inside the second connecting section (221), and the linkage assembly (40) includes two second side plates (41) fixed on one side of the limiting member (33). A movable area is limited between the two second side plates (41), and a linkage plate (42) is provided inside the movable area. A driving shaft (43) is fixed between the two second side plates (41), and a slide rail (44) adapted to the driving shaft (43) is provided on the linkage plate (42), and the driving shaft (43) is slidably connected inside the slide rail (44).

6. The elevator door pulley detection device with high stability according to claim 5, characterized in that: A pull plate (45) is fixed on one side of the linkage plate (42), a first receiving groove (46) adapted to the pull plate (45) is provided on the outer wall of the inner support column (31), and the pull plate (45) is slidably connected inside the corresponding first receiving groove (46), and a second return spring (47) is fixed between one side of the pull plate (45) and the inner wall of the first receiving groove (46).

7. The elevator door pulley detection device with high stability according to claim 6, characterized in that: An adjustment assembly (50) is provided on the inner support column (31), and the adjustment assembly (50) includes a sliding shaft (51) slidably connected to the interior of the inner support column (31), a second receiving groove (52) adapted to the sliding shaft (51) is provided on the inner support column (31), and the sliding shaft (51) is slidably connected to the interior of the second receiving groove (52), and a third return spring (53) is fixed between one end of the sliding shaft (51) and the inner wall of the second receiving groove (52).

8. The elevator door pulley detection device with high stability according to claim 7, characterized in that: Through holes adapted to the sliding shaft (51) are provided at both ends of the inner support column (31), and the outer wall of the sliding shaft (51) is slidably connected to the inner wall of the corresponding through hole, a first plug-in block (54) is fixed to the outer wall of one end of the sliding shaft (51) extending out of the through hole, and a receiving slot (55) adapted to the first plug-in block (54) is provided on the first connecting section (220) and the third connecting section (222), and the first plug-in block (54) of the sliding shaft (51) is inserted into the corresponding receiving slot (55).

9. The elevator door pulley detection device with high stability according to claim 8, characterized in that: A plug post (56) is provided on one side of the pull plate (45), a connecting hole adapted to the plug post (56) is provided on one side of the pull plate (45), and the plug post (56) is slidably connected to the inside of the connecting hole, a connecting disk (57) is fixed to the outer wall of one end of the plug post (56) extending out of the connecting hole, a fourth return spring (58) is fixed between the connecting disk (57) and the pull plate (45), a positioning groove (59) adapted to the plug post (56) is provided on the sliding shaft (51), and the plug post (56) can be inserted into the inside of the positioning groove (59).

10. The elevator door pulley detection device with high stability according to claim 5, characterized in that: The slide rail (44) is inclined and has a head end and a tail end. The head end of the slide rail (44) is close to the linkage plate (42), and the tail end of the slide rail (44) is away from the linkage plate (42). The initial position of the driving shaft (43) is located at the head end of the slide rail (44).

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