Stair chain roller of escalator
By designing escalator step chain rollers made of polyurethane rubber material with a structure in which the inner and outer sides form a 1.2° angle, the problem of uneven force distribution on the inner and outer sides of the step chain rollers is solved, reducing wear and extending service life.
Patent Information
- Application Number
- CN202520282772.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-21
- Publication Date
- 2026-01-23
- Estimated Expiration
- 2035-02-21
AI Technical Summary
The existing escalator step chain rollers experience uneven force on their inner and outer sides under heavy or full loads, leading to severe wear, especially when the unloading rail on the upper arc section is not properly adjusted.
Design an escalator step chain roller made of polyurethane rubber material. The second circular bottom surface forms a 1.2° angle with the horizontal plane. The inner and outer side structure design makes the inner and outer sides bear forces evenly. The wear is reduced by the cooperation of the limiting part and the receiving part.
It effectively reduces wear between the ladder chain rollers and the guide rails, extending the service life of both.
Smart Images
Figure CN223823145U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of elevator equipment, and concretely, especially relates to an escalator step chain roller. BACKGROUND
[0002] The escalator is a kind of special equipment, and has the characteristics of large load and high safety requirement.The Technical Specification for Escalators for Metro T / CEA 301-2023 issued by China Elevator Association requires that the rated structural load value is 5000N / m in the static strength design calculation of various structural components of the escalator, such as truss, guide rail, guide rail support, driving element, etc. 2 The specification requires that the step chain roller overload test runs at a linear speed of 0.8m / s and a load of 2500N for 16 hours.After the test, the roller should have no local concave-convex, delamination, cracking and other phenomena.
[0003] For the end-driven escalator, the design of reducing the stress of the step chain roller in the upper transition section should be adopted, the passenger branch should be provided with unloading track, and the return branch should be provided with unloading track, or the design should be ensured to guarantee that the stress of the step chain roller in the upper transition section of the return branch does not exceed 1300N.
[0004] The working surface of the step chain roller in contact with the guide rail is designed to be flush with the horizontal plane in the working state, and when the load is transmitted to the step chain roller through the step or shaft in the heavy load full load, the step chain roller is in the axial bending deformation state, so that the pressure on the inner and outer sides of the step chain roller is inconsistent, the pressure on the inner side of the step chain roller is large, and the pressure on the outer side is small, the working surface of the step chain roller in contact with the guide rail appears an inclination angle α, which can cause the inner edge to be relatively seriously worn, and further reduce the service life of the step chain roller, especially when the unloading track in the upper arc section is not adjusted in place, the pressure on the step chain roller will be further increased. SUMMARY
[0005] The utility model aims at overcoming the defects and deficiencies of prior art, and provides an escalator step chain roller, which reduces the wear between the guide rail and the step chain roller of the escalator, and balances the stress on the inner and outer sides of the step chain roller.
[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:
[0007] The escalator step chain roller is arranged above a guide rail and cooperates with a limiting part and a bearing part of the guide rail, the limiting part is connected with the bearing part, the escalator step chain roller has a first circular bottom surface, a second circular bottom surface and a curved side surface, the first circular bottom surface and the second circular bottom surface are connected with the curved side surface respectively, the curved side surface comprises an inner side surface and an outer side surface, the inner side surface is close to the limiting part of the guide rail, the outer side surface is away from the limiting part of the guide rail, the second circular bottom surface is in contact with a working surface of the bearing part, and an included angle is formed between the second circular bottom surface and a horizontal plane.
[0008] Further, the diameter of the second circular bottom surface is equal to the diameter of the first circular bottom surface.
[0009] Further, the top end of the outer side surface is higher than the top end of the inner side surface, and the bottom end of the outer side surface is lower than the bottom end of the inner side surface.
[0010] Further, the connecting part of the limiting part and the bearing part is smoothly connected.
[0011] Further, the included angle formed between the second circular bottom surface and the horizontal plane is 1.2°.
[0012] Further, the escalator step chain roller is made of polyurethane rubber material.
[0013] Further, the width of the escalator step chain roller is 25mm, and the diameter of the escalator step chain roller is 100mm.
[0014] Compared with the prior art, the escalator step chain roller of the utility model, the included angle is formed between the second circular bottom surface and the horizontal plane, when heavy load full load or half load, especially when the automatic escalator unloads the track adjustment of the upper arc segment, the problem that the inner side pressure of the step chain roller is large and the outer side pressure is small can be avoided, the mutual abrasion between the step chain roller and the guide rail is obviously reduced, and the service life of the step chain roller and the guide rail is greatly increased. BRIEF DESCRIPTION OF DRAWINGS
[0015] Figure 1 It is a comparison schematic view of the escalator step chain roller of the utility model and the prior art step chain roller.
[0016] Figure 2 It is a schematic view of the guide rail matched with the escalator step chain roller of the utility model.
[0017] Figure 3 It is a schematic view of the step chain roller and the guide rail of the prior art automatic escalator without heavy load full load or half load.
[0018] Figure 4 It is a schematic view of the step chain roller and the guide rail of the prior art automatic escalator under heavy load full load or half load.
[0019] Figure 5 It is Figure 4A local enlarged view of the contact position between the step chain roller and the guide rail.
[0020] BRIEF DESCRIPTION OF DRAWINGS
[0021] 1 - step chain roller; 11 - first circular bottom surface; 12 - second circular bottom surface; 13 - inner side surface; 14 - outer side surface; 2 - guide rail; 21 - limiting portion; 22 - bearing portion; 221 - working surface; 3 - prior art step chain roller. DETAILED DESCRIPTION
[0022] The automatic escalator step chain roller will be further described below in combination with the drawings and specific embodiments.
[0023] Please refer to Figure 1 and Figure 2 The utility model discloses an automatic escalator step chain roller 1, so that the automatic escalator is in heavy load or full load, and the force of step chain roller 1 is relatively balanced. The step chain roller 1 is arranged above the guide rail 2 and cooperates with the limiting portion 21 and the bearing portion 22 of the guide rail 2. The limiting portion 21 is connected with the bearing portion 22, and the connecting position of the limiting portion 21 and the bearing portion 22 is smoothly transitioned.
[0024] The step chain roller 1 has a first circular bottom surface 11, a second circular bottom surface 12 and a curved side surface, and the first circular bottom surface 11 and the second circular bottom surface 12 are connected with the curved side surface respectively. The curved side surface includes an inner side surface 13 and an outer side surface 14, the inner side surface 13 is close to the limiting portion 21 of the guide rail 2, and the outer side surface 14 is away from the limiting portion 21 of the guide rail 2. The second circular bottom surface 12 is in contact with the working surface 221 of the bearing portion 22, and an included angle β is formed between the second circular bottom surface 12 and the horizontal plane.
[0025] The diameter of the second circular bottom surface 12 is equal to the diameter of the first circular bottom surface 11, the top end of the outer side surface 14 is higher than the top end of the inner side surface 13, and the bottom end of the outer side surface 14 is lower than the bottom end of the inner side surface 13, that is, an included angle β is also formed between the first circular bottom surface 11 and another horizontal plane.
[0026] In the embodiment, the included angle β between the second circular bottom surface 12 and the horizontal plane is preferably 1.2°. When the step chain roller 1 is installed to the automatic escalator and is in a normal use state, the step chain roller 1 abuts against the working surface 221 of the bearing portion 22 of the guide rail 2, and the working surface 221 is the top plane of the bearing portion 22. The included angle β between the second circular bottom surface 12 of the step chain roller 1 and the horizontal plane is 1.2°, so that the second circular bottom surface 12 of the step chain roller 1 completely abuts against the working surface 221 (i.e. the top plane) of the bearing portion 22 of the guide rail 2 when the automatic escalator is in the normal use state.
[0027] In the embodiment, the step chain roller 1 is preferably made of polyurethane rubber material, the width of the step chain roller 1 is preferably 25mm, and the diameter of the step chain roller 1 is preferably 100mm.
[0028] When the escalator is in normal operation, in order to make the force on the step chain roller of the escalator relatively balanced, the force on the step chain roller should be: the inner side force is large and the outer side force is small when fully loaded; the inner side force is small and the outer side force is large when unloaded; the inner side force and the outer side force are balanced when half loaded.
[0029] The step chain roller of the escalator in the embodiment is used when the lifting height of the escalator is 27m (the larger lifting height in the industry at present), and the half load is 2500N / m 2 Under the condition, by using the knowledge of material mechanics, it is calculated that the angle between the second circular bottom surface 12 of the step chain roller 1 at both ends, the working surface 221 of the bearing part 22 of the guide rail 2 and the horizontal plane is 1.2° under the combined action of the load F and the self-gravity, so that the inner side force and the outer side force of the step chain roller 1 are balanced, thereby avoiding excessive wear between the step chain roller 1 and the guide rail 2.
[0030] As shown in Figs. Figure 3 and Figure 4 As shown in Fig. Figure 5 , when the escalator is fully loaded, the inner side pressure of the step chain roller 3 of the prior art is large, the outer side pressure is small, the working surface of the step chain roller 3 of the prior art in contact with the guide rail 2 has an inclination angle α as shown in Fig. , and the step chain roller 3 of the prior art has a serious inner side edge wear condition, and the design of the step chain roller of the escalator of the utility model avoids the occurrence of the unbalanced force condition.
[0031] In summary, the step chain roller of the escalator of the utility model forms an angle between the second circular bottom surface and the horizontal plane, and when the load is fully loaded or half loaded, especially when the unloading track of the upper arc segment of the escalator is not adjusted in place, the problem that the inner side pressure of the step chain roller 1 is large and the outer side pressure is small can be avoided, the mutual wear between the step chain roller 1 and the guide rail 2 is obviously reduced, and the service life of the step chain roller 1 and the guide rail 2 is greatly increased.
[0032] The above description is a detailed description of the preferred and feasible embodiment of the utility model, but the embodiment is not used to limit the patent application range of the utility model, and any equivalent change or modification change completed under the technical spirit disclosed by the utility model should belong to the patent range covered by the utility model.
Claims
1. An escalator step chain roller, characterized in that, The stepped chain roller is positioned above the guide rail and cooperates with the limiting part and the receiving part of the guide rail. The limiting part is connected to the receiving part. The stepped chain roller has a first circular bottom surface, a second circular bottom surface, and a curved side surface. The first circular bottom surface and the second circular bottom surface are respectively connected to the curved side surface. The curved side surface includes an inner side surface and an outer side surface. The inner side surface is close to the limiting part of the guide rail, and the outer side surface is far away from the limiting part of the guide rail. The second circular bottom surface is in contact with the working surface of the receiving part, and an angle is formed between the second circular bottom surface and the horizontal plane.
2. The escalator step chain roller according to claim 1, characterized in that, The diameter of the second circular base is equal to the diameter of the first circular base.
3. The escalator step chain roller according to claim 1, characterized in that, The top of the outer side is higher than the top of the inner side, and the bottom of the outer side is lower than the bottom of the inner side.
4. The escalator step chain roller according to claim 1, characterized in that, The connection between the limiting part and the receiving part is smoothly transitioned.
5. The escalator step chain roller according to claim 1, characterized in that, The angle between the second circular base and the horizontal plane is 1.2°.
6. The escalator step chain roller according to claim 1, characterized in that, The ladder chain rollers are made of polyurethane rubber.
7. The escalator step chain roller according to claim 1, characterized in that, The width of the step chain roller is 25mm, and the diameter of the step chain roller is 100mm.