Escalator step connecting structure facilitating installation and maintenance

Abstract

The utility model belongs to the technical field of step connection structure, especially convenient installation maintenance's escalator step connection structure, including step board and transmission shaft, the inside of step board is respectively worn and is equipped with transmission shaft and guide column, one side symmetry of step board is installed with connecting plate and butt joint board, the side close to step board of connecting plate and butt joint board is equipped with the reinforcing rib that installs fixedly, the both ends of connecting plate one side are fixedly connected with swallow -tailed thin piece, the middle part of connecting plate one side is equipped with the thick piece draw -in groove, the both ends of butt joint board one side all are equipped with thin piece butt joint groove, the middle part of butt joint board one side is fixed with swallow -tailed thick piece, through swallow -tailed groove clamping mechanism, realize the quick sliding -in type assembly of connecting plate and butt joint board, maintenance time reduces, and swallow -tailed thick piece and through slot draw -in groove form mechanical interlock, even if bolt failure still can keep frame integrity, radial reinforcing rib makes connecting plate bending strength promotion.

Description

Technical Field

[0001] This utility model belongs to the technical field of ladder connection structure, specifically relating to a ladder connection structure for escalators and elevators that is easy to install and maintain. Background Technology

[0002] Escalators are composed of a specially structured chain conveyor and two specially structured belt conveyors. They have a circulating movement path and are fixed electric drive equipment used to transport passengers upward or downward at different floor heights in a building. The operation of the escalator steps is driven by a drive shaft with chains at both ends. When the chains on both sides of the escalator are out of sync during operation, the drive shaft is very prone to breakage and damage at the point where it passes through the step shaft hole, causing the steps to fall off and easily resulting in safety accidents.

[0003] Chinese Patent Publication No. CN209009956U discloses an elevator step drive shaft fixing device, relating to the field of elevator component technology. The device includes a step with a drive shaft mounted on it. A shaft hole is formed in the step, through which the drive shaft passes. A guide post is fixedly connected to the drive shaft on the step. A connecting plate, either integral or detachable, is fitted onto the guide post and drive shaft and fixed to the step with bolts. A lubrication mechanism is provided between the drive shaft and the connecting plate. This elevator step drive shaft fixing device, by providing a connecting plate outside the shaft hole where the drive shaft is installed, can provide secondary fixing of the drive shaft when the shaft hole breaks. Furthermore, the lubrication mechanism between the drive shaft and the connecting plate prevents wear caused by prolonged relative rotation between the drive shaft and the connecting plate, further improving the supporting and fixing effect of the connecting plate on the drive shaft.

[0004] Although the aforementioned step drive shaft fixing device can prevent wear caused by the relative rotation between the drive shaft and the connecting plate over a long period of time, the split connecting plate is only fixed by bolts and relies solely on the guide column and drive shaft sleeve for support. When the shaft hole breaks, the connecting plate has to bear the dynamic load of the entire drive shaft, and is prone to fatigue fracture under vibration. Therefore, we propose an escalator step connection structure that is easy to install and maintain. Utility Model Content

[0005] To address the problem in the aforementioned background technology where the split connecting plate is fixed only by bolts and supported solely by the guide column and drive shaft sleeve, resulting in the connecting plate bearing the entire dynamic load of the drive shaft when the shaft hole breaks, making it prone to fatigue fracture under vibration, this utility model provides an escalator step connection structure that is easy to install and maintain.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an escalator step connection structure that is easy to install and maintain, including a step plate and a drive shaft. The drive shaft and guide column are respectively installed inside the step plate. A connecting plate and a docking plate are symmetrically installed on one side of the step plate. A reserved groove is provided at the connection between the connecting plate and the drive shaft and the guide column. A reinforcing rib is installed and fixed on the side of the connecting plate and the docking plate near the step plate.

[0007] The connecting plate has dovetail thin blocks fixedly connected to both ends on one side, and a thick block slot is opened in the middle of one side of the connecting plate. The connecting plate has thin block docking slots opened at both ends on one side of the docking plate, and a dovetail thick block is fixed in the middle of one side of the docking plate.

[0008] As a preferred embodiment of the escalator step connection structure of this utility model that facilitates installation and maintenance, the thin block docking groove is a semi-deep groove, and the size of the dovetail thin block matches that of the thin block docking groove.

[0009] As a preferred embodiment of the escalator step connection structure of this utility model that facilitates installation and maintenance, the thick block slot is a through slot, and the size of the dovetail thick block matches that of the thick block slot.

[0010] As a preferred embodiment of the escalator step connection structure of this utility model that facilitates installation and maintenance, a positioning bolt is installed inside the dovetail thin block, and polyurethane gaskets are provided between the positioning bolt and the dovetail thin block, as well as between the connecting plate and the step plate.

[0011] As a preferred embodiment of the escalator step connection structure of this utility model that facilitates installation and maintenance, the reinforcing ribs are radially arranged and equidistantly distributed.

[0012] As a preferred embodiment of the escalator step connection structure of this utility model that facilitates installation and maintenance, a self-lubricating bushing is fixedly installed at the connection between the reserved groove and the drive shaft and the guide column. The self-lubricating bushing is made of copper-based graphite composite material, and the inner wall of the self-lubricating bushing is in clearance fit with the drive shaft and the guide column.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: This application achieves rapid sliding assembly of the connecting plate and the mating plate through the dovetail groove engagement mechanism, reducing maintenance time. Moreover, the dovetail thick block and the through groove form a mechanical interlock, which can maintain the integrity of the frame even if the bolts fail. The radial reinforcing ribs improve the bending strength of the connecting plate and prevent the connecting plate and the step from being supported only by the guide column and the drive shaft sleeve. When the shaft hole breaks, the connecting plate has to bear the dynamic load of the entire drive shaft, which leads to the problem of fatigue fracture of the connecting plate. Attached Figure Description

[0014] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the planar structure of the present invention;

[0017] Figure 3 This is a schematic diagram of the connection structure of the connecting plate and the mating plate in this utility model;

[0018] Figure 4 This is a schematic diagram of the separation structure of the connecting plate and the mating plate in this utility model.

[0019] In the diagram: 1. Step plate; 2. Drive shaft; 3. Connecting plate; 4. Butt plate; 5. Guide post; 6. Self-lubricating bushing; 7. Dovetail thin block; 8. Thin block butt groove; 9. Dovetail thick block; 10. Thick block slot; 11. Positioning bolt; 12. Polyurethane gasket; 13. Reserved groove; 14. Reinforcing rib. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model. Embodiment 1

[0021] like Figures 1-4 As shown;

[0022] An escalator step connection structure that is easy to install and maintain includes a step plate 1 and a drive shaft 2. The drive shaft 2 and guide column 5 are respectively installed inside the step plate 1. A connecting plate 3 and a docking plate 4 are symmetrically installed on one side of the step plate 1. The connection points of the connecting plate 3 and the docking plate 4 with the drive shaft 2 and the guide column 5 are all provided with reserved grooves 13. The connecting plate 3 and the docking plate 4 are fixedly installed with reinforcing ribs 14 on the side of the connecting plate 3 and the side of the docking plate 4 near the step plate 1. Dovetail thin blocks 7 are fixedly connected to both ends of one side of the connecting plate 3. A thick block slot 10 is opened in the middle of one side of the connecting plate 3. Thin block docking grooves 8 are opened at both ends of one side of the docking plate 4. A dovetail thick block 9 is fixed in the middle of one side of the docking plate 4.

[0023] In this implementation scheme: the dovetail groove engaging mechanism enables the quick sliding assembly of the connecting plate 3 and the mating plate 4, reducing maintenance time. Furthermore, the dovetail thick block 9 and the through groove form a mechanical interlock, ensuring the integrity of the frame even if the bolts fail. The radial reinforcing ribs 14 enhance the bending strength of the connecting plate 3.

[0024] In an optional embodiment, the thin block mating groove 8 is a semi-deep groove, and the dovetail thin block 7 is sized to match the thin block mating groove 8.

[0025] In this implementation scheme: the dovetail groove engaging mechanism enables the quick engaging assembly of the connecting plate 3 and the docking plate 4, reducing maintenance time. The connecting plate 3 and the docking plate 4 are made of 40Cr alloy steel, and the dovetail thin block 7 and the dovetail thick block 9 are surface hardened.

[0026] In an optional embodiment, the thick block slot 10 is a through slot, and the dovetail thick block 9 matches the size of the thick block slot 10.

[0027] In this implementation plan: the dovetail block 9 and the through slot form a mechanical interlock, which can maintain the integrity of the frame even if the bolt fails.

[0028] In an optional embodiment, a positioning bolt 11 is installed inside the dovetail thin block 7, and the positioning bolt 11 is connected and fixed to the dovetail thin block 7, the connecting plate 3, the mating plate 4 and the step plate 1, and a polyurethane gasket 12.

[0029] In this implementation scheme: the positioning bolt 11 can absorb the impact load through the double-layer buffer design of the polyurethane gasket 12 between the connecting plate 3 and the step plate 1, preventing the bolt from loosening.

[0030] In an optional embodiment, the reinforcing ribs 14 have a radial structure and are equidistantly distributed among themselves.

[0031] In this implementation scheme: the radial reinforcing ribs 14 improve the bending strength of the connecting plate 3.

[0032] In an optional embodiment, a self-lubricating bushing 6 is fixedly installed at the connection between the reserved groove 13 and the drive shaft 2 and the guide post 5. The self-lubricating bushing 6 is made of copper-based graphite composite material, and the inner wall of the self-lubricating bushing 6 is in clearance fit with the drive shaft 2 and the guide post 5.

[0033] In this implementation plan: the reserved groove 13 is designed to support the rapid separation of components in emergency situations. The self-lubricating bushing 6 is interference-fitted to the shaft hole of the step plate 1 to protect the drive shaft 2 and the guide post 5, eliminate direct metal-to-metal friction, and avoid the risk of traditional graphite blocks falling off.

[0034] Working principle: First, the split connecting plate 3 and the docking plate 4 are docked. Both connecting plate 3 and docking plate 4 are made of high-strength alloy steel. Connecting plate 3 and docking plate 4 are placed symmetrically, with connecting plate 3 positioned higher, aligned with the dovetail thin block 7 and the thin block docking groove 8. Connecting plate 3 is then slid down and pressed into one side of docking plate 4. The dovetail thick block 9 is embedded in the through-slot thick block slot 10, forming a mechanical interlock through vertical engagement. Next, connecting plate 3 and docking plate 4 are relatively fixed to the step plate 1. Connecting plate 3 and docking plate 4 are placed on one side of the step plate 1, allowing the drive shaft 2 and guide post 5 to pass through the pre-reserved groove 13. Then, polyurethane gaskets 12 are fitted onto the outside of the positioning bolts 11. Polyurethane gaskets 12 are placed at the connection between the positioning bolts 11 and the dovetail thin block 7, and between the connecting plate 3 and the step plate 1. Finally, the positioning bolts 11 are... Passing through the dovetail thin block 7 and the thin block mating groove 8 until the end is positioned inside the step plate 1, the connecting plate 3 and the mating plate 4 can be relatively fixed. In the final use, the self-lubricating bushing 6, which is sleeved on the root of the drive shaft 2 and the guide column 5, is interference-fitted with the shaft hole of the step plate 1 to wrap the drive shaft 2. The shaft and hole interface are automatically lubricated by copper-based graphite material to avoid direct metal-to-metal friction. At the same time, the polyurethane gasket 12 at the connection between the positioning bolt 11 and the dovetail thin block 7, and between the connecting plate 3 and the step plate 1, absorbs the impact vibration caused by the asynchronous chain, prevents the positioning bolt 11 from loosening, and reduces structural fatigue. The radial reinforcing ribs 14 distribute the load to a larger area of ​​the step plate 1, increasing the structural strength of the connecting plate 3 and the mating plate 4.

[0035] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An escalator step connection structure that is easy to install and maintain, comprising step plates (1) and a drive shaft (2), characterized in that: The interior of the step plate (1) is provided with a drive shaft (2) and a guide post (5). A connecting plate (3) and a docking plate (4) are symmetrically installed on one side of the step plate (1). A reserved groove (13) is provided at the connection between the connecting plate (3) and the docking plate (4) and the drive shaft (2) and the guide post (5). A reinforcing rib (14) is installed and fixed on the side of the connecting plate (3) and the docking plate (4) near the step plate (1). The two ends of one side of the connecting plate (3) are fixedly connected with dovetail thin blocks (7), the middle of one side of the connecting plate (3) is provided with a thick block slot (10), the two ends of one side of the docking plate (4) are provided with thin block docking slots (8), and the middle of one side of the docking plate (4) is fixed with a dovetail thick block (9).

2. The escalator step connection structure for easy installation and maintenance according to claim 1, characterized in that: The thin block docking groove (8) is a semi-deep groove, and the dovetail thin block (7) matches the size of the thin block docking groove (8).

3. The escalator step connection structure for easy installation and maintenance according to claim 1, characterized in that: The thick block slot (10) is a through slot, and the size of the dovetail thick block (9) matches that of the thick block slot (10).

4. The escalator step connection structure for easy installation and maintenance according to claim 1, characterized in that: The dovetail thin block (7) is equipped with a positioning bolt (11), and polyurethane gaskets (12) are provided between the positioning bolt (11) and the dovetail thin block (7), as well as between the connecting plate (3) and the step plate (1).

5. The escalator step connection structure for easy installation and maintenance according to claim 1, characterized in that: The reinforcing ribs (14) are radial structures and are equidistantly distributed among themselves.

6. The escalator step connection structure for easy installation and maintenance according to claim 1, characterized in that: A self-lubricating bushing (6) is fixedly installed at the connection between the reserved groove (13) and the drive shaft (2) and the guide post (5). The self-lubricating bushing (6) is made of copper-based graphite composite material, and the inner wall of the self-lubricating bushing (6) is in clearance fit with the drive shaft (2) and the guide post (5).

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