Elevator car ceiling mounting structure and assembled ceiling

Abstract

The application belongs to the technical field of elevator car ceiling and discloses an elevator car ceiling mounting structure and a split ceiling, which comprises an elevator car, the top of the elevator car is penetrated and fixedly connected with four spotlights around, the bottom of a fixing frame is bolted with the top of the elevator car, the top of the fixing frame is bolted with the bottom of a top plate, and the bottom of a connecting strip is bolted with the inner wall bottom of the fixing frame, so that quick assembly work is carried out. Because the bottom of the special-shaped hole is provided with a square hole on both sides, the first light-transmitting plate and the second light-transmitting plate are inclined, one end of the two plates enters the ceiling through the square hole, then the second light-transmitting plate and the first light-transmitting plate are laid flat, the two plates are precisely connected with the special-shaped hole, the parts in the ceiling are prevented from being seen by the passengers of the elevator, the second light-transmitting plate can be precisely attached to the bottom of the special-shaped hole, and the appearance of the top of the elevator car after installation is improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of elevator car ceiling, and particularly relates to an elevator car ceiling mounting structure and a spliced ceiling. BACKGROUND

[0002] At present, elevators are increasingly close to our life, and can be seen everywhere in residential buildings, hotels, shopping malls and the like, and are indispensable equipment for modern development. In order to improve the overall installation effect of the elevator, make the elevator more tidy and beautiful, and continuously improve the design requirements of the elevator.

[0003] The prior art document with the file number CN209322242U discloses an elevator ceiling mounting structure, which solves the problem that passengers can directly see the hinged structure and fixed parts from the inside of the elevator car, and comprises a ceiling mounting plate and a fixed part arranged on one side of the ceiling mounting plate. The fixed part is used for fixing the ceiling mounting plate to the top of the car to suspend the ceiling mounting plate. The ceiling mounting plate is divided into a first decorative plate located in the middle and a second decorative plate located on both sides of the decorative plate. An installation opening for installing a light-transmitting plate is formed in the first decorative plate. The light-transmitting plate is fixed on the side of the first decorative plate away from the car to block the installation opening. According to the above technical scheme, the first decorative plate is arranged on the ceiling mounting plate, the installation opening is formed in the first decorative plate, the light-transmitting plate is fixed on the side of the first decorative plate away from the car and the installation opening is blocked, thereby achieving the purpose of improving the passenger elevator riding experience. The utility is good, easy to popularize and apply, and has great value.

[0004] Although the above application can solve the problem that passengers can see the hinged structure and fixed parts from the inside of the elevator car, during the installation of the light-transmitting plate in the ceiling, a plurality of bolts are needed to firmly fix the light-transmitting plate. When the structure inside the ceiling needs to be replaced, the plurality of bolts need to be twisted and disassembled, thereby reducing the disassembly and replacement efficiency. SUMMARY

[0005] To solve the problem of slow replacement of the light-transmitting plate in the above background art, since the light-transmitting plate needs to be disassembled from a plurality of connecting parts during replacement, the process is relatively complicated, resulting in low efficiency. The application provides an elevator car ceiling mounting structure and a spliced ceiling.

[0006] In order to achieve the above object, the present application provides the following technical scheme: an elevator car ceiling mounting structure and a spliced ceiling, comprising an elevator car, four spotlights are fixedly connected through the top of the elevator car on all sides, fixed frames are fixedly connected on both sides of the top of the elevator car, a top plate is fixedly connected on the top of the fixed frame, the top plate is provided with one, further comprising a quick mounting mechanism, the quick mounting mechanism comprises a fixed frame fixedly connected on the bottom of the top plate, a square panel lamp is fixedly connected on the inner wall of the fixed frame, two connecting strips are fixedly connected on both sides of the bottom of the inner wall of the fixed frame, an installation assembly is arranged on the top of the inner wall of the elevator car, and the installation assembly is used for quickly splicing and disassembling the ceiling.

[0007] Preferably, the installation assembly comprises a special-shaped hole arranged on the top of the inner wall of the elevator car, a first light-transmitting plate is in contact with the top end of the inner wall of the special-shaped hole, and a second light-transmitting plate is fixedly connected with the top of the first light-transmitting plate.

[0008] Preferably, the top of the second light-transmitting plate is in contact with a roller, the roller is provided with four, a bearing table is rotatably connected with the inner wall of the roller, and the bearing table is provided with one.

[0009] Preferably, a rotating rod is rotatably connected through one side of the bearing table, rotating plates are hingedly connected at both ends of the rotating rod, a vertical plate is hingedly connected with the top end of the rotating plate, and a connecting plate is fixedly connected with the bottom of the vertical plate.

[0010] Preferably, a tension spring is fixedly connected between the two connecting plates, a limiting groove is arranged on one side of the connecting strip, and one end of the connecting plate is slidably connected with the inner wall of the limiting groove.

[0011] Preferably, the tension spring is provided with two, and the tension spring is arranged in the limiting groove.

[0012] Preferably, a stabilizing assembly is arranged on the side wall of the connecting plate, the stabilizing assembly comprises a sliding frame rod rotatably connected through one side of the connecting plate, and a special-shaped plate is fixedly connected with one end of the sliding frame rod.

[0013] Preferably, an extrusion spring is fixedly connected with the side of the special-shaped plate close to the sliding frame rod, one end of the extrusion spring is fixedly connected with one side of the connecting plate, and a special-shaped clamping block is fixedly connected with the side of the special-shaped plate away from the sliding frame rod.

[0014] Preferably, an auxiliary assembly is arranged at the end of the bearing table, the auxiliary assembly comprises a horizontal plate fixedly connected with both ends of the bearing table, and a screw rod is fixedly connected with the bottom of the horizontal plate.

[0015] Preferably, the outer wall of the bottom end of the screw rod is threadedly connected with a nut sleeve rod, and the elevator car is provided with positioning holes at the top of the two ends of the inner wall of the special-shaped hole.

[0016] Compared with the prior art, the present application has the following advantages:

[0017] The bottom of the fixing frame is bolted to the top of the elevator car, the top of the fixing frame is bolted to the bottom of the top plate, and the bottom of the connecting strip is bolted to the inner wall of the fixing frame, thereby achieving rapid assembly. Due to the square hole formed on both sides of the bottom of the special-shaped hole, the first and second light-transmitting plates are inclined, one end of each plate enters the ceiling through the square hole, and then the second light-transmitting plate is placed flat and the first light-transmitting plate is precisely connected with the special-shaped hole, preventing the parts inside the ceiling from being seen by the passengers in the elevator, and the second light-transmitting plate can be precisely fitted with the bottom of the special-shaped hole, improving the appearance of the top of the elevator car after installation. When the second light-transmitting plate moves upward, the second light-transmitting plate will contact the bottom of the roller, causing the roller and the bearing table to move upward, the bearing table drives the rotating rod and the rotating plate to move upward, the rotating plate drives the vertical plate and the connecting plate to slide along the inner wall of the limiting groove, the two connecting plates move away from each other, the connecting plate drives the sliding frame rod and the special-shaped plate to move, the special-shaped plate drives the special-shaped clamping block to move, and the special-shaped clamping block can enter the inside of the fixing frame during movement, resisting the bolts, preventing the bolts from falling off due to vibration during operation of the elevator car, and improving the stability of the ceiling after installation.

[0018] When the second light-transmitting plate is inclined and enters the ceiling, the bearing table can drive the roller to tightly fit the top of the inclined second light-transmitting plate, preventing the second light-transmitting plate from being stuck during the upward movement. This design ensures the smoothness of the device during operation, avoiding the problem of jamming or shutdown caused by parts being stuck. During the process of the second light-transmitting plate entering the ceiling, the inclination of the second light-transmitting plate needs to be adjusted slightly to make the second light-transmitting plate and the first light-transmitting plate completely enter the ceiling. During the small-angle deviation of the second light-transmitting plate, the roller can rotate, the second light-transmitting plate and the roller are tightly fitted, the friction between the second light-transmitting plate and other parts is reduced, and excessive friction is avoided, which not only reduces wear and tear, but also improves the protection effect of the second light-transmitting plate.

[0019] The application sets up a quick mounting mechanism, when the second light-transmitting plate and the first light-transmitting plate completely enter into the ceiling interior and are laid flat, then the second light-transmitting plate and the first light-transmitting plate are vertically lowered, at this time the second light-transmitting plate no longer extrudes the roller, is elastically deformed by the tension spring, the two connecting plates are reset in the limiting groove, the bearing table is reset and lowered, the bearing table drives the cross plate and the screw to be lowered, the screw is lowered into the positioning hole, so that the bearing table drives the roller to be completely flat on the top of the second light-transmitting plate, prevents the bearing table from tilting, avoids instability caused by tilting or deviation. The stability of the equipment is improved, especially under dynamic load. After the screw enters into the positioning hole, the worker screws the nut sleeve rod and the screw, so that the multiple rollers tightly press the top of the second light-transmitting plate, prevents the second light-transmitting plate and the first light-transmitting plate from shaking up and down in the special-shaped hole when the elevator car runs, can greatly improve the stability after installation, avoids noise or wear caused by shaking. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is the overall bottom view structural schematic diagram of the application;

[0021] Figure 2 It is the bottom view structural schematic diagram of the square panel light of the application;

[0022] Figure 3 It is the second light-transmitting plate of the application Figure 2 It is the enlarged view of A in the application;

[0023] Figure 4 It is the side view structural schematic diagram of the second light-transmitting plate of the application;

[0024] Figure 5 It is the enlarged view of B in the application Figure 4

[0025] Figure 6 It is the cross-sectional view structural schematic diagram of the bearing table of the application;

[0026] Figure 7 It is the cross-sectional view structural schematic diagram of the nut sleeve rod of the application;

[0027] Figure 8 It is the explosion structural schematic diagram of the special-shaped hole of the application.

[0028] ​In the diagram: 1. Elevator car; 2. Spotlight; 3. Fixing frame; 4. Top plate; 5. Quick installation mechanism; 51. Fixing frame; 52. Square panel light; 53. Connecting strip; 54. Installation component; 55. Stabilizing component; 56. Auxiliary component; 541. First light-transmitting plate; 542. Second light-transmitting plate; 5413. Irregular hole; 543. Roller; 544. Support platform; 545. Rotating rod; 546. Rotating plate; 547. Vertical plate; 548. Connecting plate; 549. Tension spring; 5410. Limiting groove; 551. Sliding frame rod; 552. Irregular plate; 553. Compression spring; 554. Irregular locking block; 561. Horizontal plate; 562. Screw; 563. Nut sleeve rod; 564. Positioning hole. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] like Figures 1 to 8 As shown, the present invention provides an elevator car ceiling installation structure and a modular ceiling, including an elevator car 1, four spotlights 2 are fixedly connected through and fixedly connected to the top four sides of the elevator car 1, and fixed brackets 3 are fixedly connected to both sides of the top of the elevator car 1. A top plate 4 is fixedly connected to the top of the fixed brackets 3, and the top plate 4 is provided with one, and also includes;

[0031] The quick installation mechanism 5 includes a fixed frame 51 fixedly connected to the bottom of the top plate 4. A square panel light 52 is fixedly connected to the inner wall of the fixed frame 51. Two connecting strips 53 are fixedly connected to the bottom sides of the inner wall of the fixed frame 3. An installation component 54 is provided on the top of the inner wall of the elevator car 1 for quick assembly and disassembly of the ceiling.

[0032] The above solution is adopted: the bottom of the fixing frame 3 is connected to the top of the elevator car 1 by bolts, the top of the fixing frame 3 is also connected to the bottom of the top plate 4 by bolts, and the bottom of the connecting strip 53 is fixed to the bottom of the inner wall of the fixing frame 3 by bolts, so as to achieve rapid assembly.

[0033] The mounting component 54 includes an irregular hole 5413 formed on the top of the inner wall of the elevator car 1. The top of the inner wall of the irregular hole 5413 contacts a first light-transmitting plate 541, and a second light-transmitting plate 542 is fixedly connected to the top of the first light-transmitting plate 541.

[0034] Adopting the above scheme: by setting a square hole on both sides of the bottom of the special-shaped hole 5413, the first light-transmitting plate 541 and the second light-transmitting plate 542 are inclined, and one end of the first light-transmitting plate 541 enters the ceiling interior through the square hole. Then, the second light-transmitting plate 542 and the first light-transmitting plate 541 placed horizontally are accurately docked with the special-shaped hole 5413, so as to avoid that the parts in the ceiling interior are exposed to the elevator passengers. This design ensures that the second light-transmitting plate 542 is precisely attached to the bottom of the special-shaped hole 5413, and the appearance of the top of the elevator car 1 is improved.

[0035] The top of the second light-transmitting plate 542 is in contact with rollers 543, the rollers 543 are provided with four, and the inner wall of the roller 543 is rotatably connected with a bearing table 544, and the bearing table 544 is provided with one.

[0036] One side of the bearing table 544 penetrates and is rotatably connected with a rotating rod 545, both ends of the rotating rod 545 are hingedly connected with rotating plates 546, the top end of the rotating plate 546 is hingedly connected with a vertical plate 547, and the bottom of the vertical plate 547 is fixedly connected with a connecting plate 548.

[0037] Adopting the above scheme: when the second light-transmitting plate 542 is inclined to enter the ceiling interior, since the rotating rod 545 and the bearing table 544 are rotatably arranged, the bearing table 544 can drive the rollers 543 to be closely attached to the top of the inclined second light-transmitting plate 542.

[0038] Two connecting plates 548 are fixedly connected with a tension spring 549, one side of the connecting strip 53 is provided with a limiting groove 5410, and one end of the connecting plate 548 is slidably connected to the inner wall of the limiting groove 5410.

[0039] The tension spring 549 is provided with two, and the tension spring 549 is arranged in the inside of the limiting groove 5410.

[0040] Adopting the above scheme: in the process that the second light-transmitting plate 542 enters the ceiling interior, it is necessary to slightly adjust the inclination angle thereof, so as to ensure that the second light-transmitting plate 542 and the first light-transmitting plate 541 completely enter the ceiling interior. When the second light-transmitting plate 542 is slightly deviated, since the rollers 543 can rotate, the second light-transmitting plate 542 is closely attached to the rollers 543, and the friction between the second light-transmitting plate 542 and other components is effectively reduced, so that the generation of excessive friction force is avoided.

[0041] As shown in Figures 1 to 8 The side wall of the connecting plate 548 is provided with a stabilizing assembly 55, the stabilizing assembly 55 comprises a sliding frame rod 551 which penetrates and is slidably connected to one side of the connecting plate 548, and one end of the sliding frame rod 551 is fixedly connected with a special-shaped plate 552.

[0042] The extruded spring 553 is fixedly connected to one side of the special-shaped plate 552 close to the sliding frame rod 551, one end of the extruded spring 553 is fixedly connected to one side of the connecting plate 548, and the special-shaped clamping block 554 is fixedly connected to the side of the special-shaped plate 552 away from the sliding frame rod 551.

[0043] By adopting the above scheme, when the second light transmission plate 542 moves upward, the second light transmission plate 542 will contact the bottom of the roller 543, so that the roller 543 moves upward together with the bearing table 544. The bearing table 544 drives the rotating rod 545 and the rotating plate 546 to move upward, and the rotating plate 546 drives the vertical plate 547 and the connecting plate 548 to slide along the inner wall of the limiting groove 5410. The two connecting plates 548 are separated from each other, drive the sliding frame rod 551 and the special-shaped plate 552 to move, and the special-shaped plate 552 drives the special-shaped clamping block 554 to move. The special-shaped clamping block 554 can enter the inside of the fixed frame 3 during the movement process, and effectively resist a plurality of bolts.

[0044] The end of the bearing table 544 is provided with an auxiliary assembly 56, and the auxiliary assembly 56 includes a horizontal plate 561 fixedly connected to both ends of the bearing table 544, and a screw rod 562 fixedly connected to the bottom of the horizontal plate 561.

[0045] The outer wall of the bottom end of the screw rod 562 is threadedly connected with a nut sleeve rod 563, and the top end of the nut sleeve rod 563 is slidingly connected to the inner wall of the positioning hole 564.

[0046] By adopting the above scheme, when the second light transmission plate 542 and the first light transmission plate 541 completely enter the inside of the ceiling and are placed flat, then the second light transmission plate 542 and the first light transmission plate 541 are vertically lowered. During this process, the second light transmission plate 542 no longer exerts upward extrusion on the roller 543, but through the elastic deformation of the tension spring 549, the two connecting plates 548 are reset in the limiting groove 5410. The bearing table 544 is reset and lowered, driving the horizontal plate 561 and the screw rod 562 to descend together. When the screw rod 562 descends, it enters the inside of the positioning hole 564, thereby ensuring that the bearing table 544 drives the roller 543 to completely and flatly adhere to the top of the second light transmission plate 542.

[0047] The working principle and use process of the application are as follows:

[0048] In use, the bottom of the fixing frame 3 is bolted to the top of the elevator car 1, the top of the fixing frame 3 is bolted to the bottom of the top plate 4, and the bottom of the connecting strip 53 is bolted to the inner wall bottom of the fixing frame 3, thereby quickly assembling. Because the two sides of the bottom of the special-shaped hole 5413 are provided with a square hole, by tilting the first light-transmitting plate 541 and the second light-transmitting plate 542, one end of the two enters the ceiling interior through the square hole, then the second light-transmitting plate 542 is placed flat with the first light-transmitting plate 541, so as to be precisely connected with the special-shaped hole 5413, preventing the parts inside the ceiling from being seen by the passengers of the elevator, and the second light-transmitting plate 542 can be precisely fitted with the bottom of the special-shaped hole 5413, improving the aesthetics of the top of the elevator car 1 after installation. When the second light-transmitting plate 542 moves upward, the second light-transmitting plate 542 will contact the bottom of the roller 543, causing the roller 543 and the bearing table 544 to move upward, the bearing table 544 drives the rotating rod 545 and the rotating plate 546 to move upward, and the rotating plate 546 drives the vertical plate 547 and the connecting plate 548 to slide along the inner wall of the limiting groove 5410, the two connecting plates 548 move away from each other, the connecting plate 548 drives the sliding frame rod 551 and the special-shaped plate 552 to move, the special-shaped plate 552 drives the special-shaped clamping block 554 to move, and the special-shaped clamping block 554 can enter the inside of the fixing frame 3 during movement, resisting the bolts, preventing the bolts from falling off due to vibration during operation of the elevator car 1, and improving the stability of the ceiling after installation.

[0049] When the second light-transmitting plate 542 is tilted and enters the ceiling interior, because the rotating rod 545 and the bearing table 544 are rotationally arranged, the bearing table 544 can drive the roller 543 to tightly fit with the top of the inclined second light-transmitting plate 542, preventing the second light-transmitting plate 542 from being stuck during the rising process. This design ensures the smoothness of the device during operation, avoiding the problem of jamming or shutdown caused by parts being stuck. During the process of the second light-transmitting plate 542 entering the ceiling interior, the inclination position of the second light-transmitting plate 542 needs to be adjusted slightly, so that the second light-transmitting plate 542 and the first light-transmitting plate 541 completely enter the ceiling interior. At this time, during the small-angle deviation of the second light-transmitting plate 542, because the roller 543 can rotate, when the second light-transmitting plate 542 tightly fits with the roller 543, the friction between the second light-transmitting plate 542 and other parts can be reduced, avoiding excessive friction force. This not only reduces wear and tear, but also improves the protection effect of the second light-transmitting plate 542.

[0050] When the second light-transmitting plate 542 is completely entered into the ceiling and then laid flat, the second light-transmitting plate 542 is vertically lowered, at which time the second light-transmitting plate 542 no longer presses the roller 543 upward, and the elastic deformation of the tension spring 549 causes the two connecting plates 548 to reset in the limiting groove 5410, and the bearing table 544 resets and descends, and the bearing table 544 drives the horizontal plate 561 and the screw rod 562 to descend, and the screw rod 562 descends into the positioning hole 564, so that the bearing table 544 drives the roller 543 to completely and flatly adhere to the top of the second light-transmitting plate 542, preventing the bearing table 544 from tilting, and avoiding instability caused by tilting or deviation. The stability of the equipment is improved, especially under dynamic load. After the screw rod 562 enters the positioning hole 564, the worker screws the nut sleeve rod 563 with the screw rod 562, so that the plurality of rollers 543 tightly press the top of the second light-transmitting plate 542, preventing the second light-transmitting plate 542 and the first light-transmitting plate 541 from shaking up and down in the special-shaped hole 5413 when the elevator car 1 runs, which can greatly improve the stability after installation and avoid noise or wear caused by shaking.

[0051] It should be noted that the relational terms herein such as first and second and the like are used solely to distinguish one entity or action from another, without necessarily requiring or implying any such actual relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0052] Although embodiments of the present application have been shown and described, it is to be understood that various modifications, substitutions, replacements and changes can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. An elevator car ceiling installation structure and a modular ceiling, comprising an elevator car (1), wherein four spotlights (2) are fixedly connected through and fixedly connected to the top four sides of the elevator car (1), and fixing frames (3) are fixedly connected to both sides of the top of the elevator car (1), and a top plate (4) is fixedly connected to the top of the fixing frames (3), wherein the top plate (4) is provided with one, characterized in that: Also includes; The quick installation mechanism (5) includes a fixed frame (51) fixedly connected to the bottom of the top plate (4), the inner wall of the fixed frame (51) is fixedly connected with a square panel light (52), the bottom of the inner wall of the fixed frame (3) is fixedly connected with two connecting strips (53), and the inner wall of the top of the elevator car (1) is provided with a mounting assembly (54) for quickly assembling and disassembling the ceiling; The mounting assembly (54) includes a special-shaped hole (5413) opened in the inner wall of the top of the elevator car (1), and the inner wall of the special-shaped hole (5413) is in contact with a first light-transmitting plate (541), and the top of the first light-transmitting plate (541) is fixedly connected with a second light-transmitting plate (542); The top of the second light-transmitting plate (542) is in contact with a roller (543), the roller (543) is provided with four, the inner wall of the roller (543) is rotatably connected with a bearing table (544), and the bearing table (544) is provided with one; One side of the bearing table (544) penetrates and is rotatably connected with a rotating rod (545), both ends of the rotating rod (545) are hingedly connected with a rotating plate (546), the top end of the rotating plate (546) is hingedly connected with a vertical plate (547), and the bottom of the vertical plate (547) is fixedly connected with a connecting plate (548); The side wall of the connecting plate (548) is provided with a stabilizing assembly (55), and the stabilizing assembly (55) includes a sliding frame rod (551) penetrating and slidingly connected on one side of the connecting plate (548).

2. The elevator car ceiling mounting structure and the assembled ceiling according to claim 1, characterized by: Two connecting plates (548) are fixedly connected with a tension spring (549), and one side of the connecting strip (53) is provided with a limiting groove (5410), and one end of the connecting plate (548) is slidingly connected in the limiting groove (5410).

3. The elevator car ceiling mounting structure and the assembled ceiling according to claim 2, characterized by: The tension spring (549) is provided with two, and the tension spring (549) is arranged in the limiting groove (5410).

4. The elevator car ceiling mounting structure and the assembled ceiling according to claim 3, characterized by: The side of the special-shaped plate (552) close to the sliding frame rod (551) is fixedly connected with an extrusion spring (553), one end of the extrusion spring (553) is fixedly connected to one side of the connecting plate (548), and the side of the special-shaped plate (552) away from the sliding frame rod (551) is fixedly connected with a special-shaped clamping block (554).

5. The elevator car ceiling mounting structure and the assembled ceiling according to claim 4, characterized by: The end of the bearing table (544) is provided with an auxiliary assembly (56), and the auxiliary assembly (56) includes a horizontal plate (561) fixedly connected to both ends of the bearing table (544), and the bottom of the horizontal plate (561) is fixedly connected with a screw rod (562).

6. The elevator car ceiling mounting structure and the assembled ceiling according to claim 5, characterized by: The bottom end of the screw rod (562) is threadedly connected with a nut sleeve rod (563), and the top of the inner wall of the elevator car (1) close to the special-shaped hole (5413) is provided with a positioning hole (564), and the top end of the outer wall of the nut sleeve rod (563) is slidingly connected to the inner wall of the positioning hole (564).

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