Escalator step chain roller with double seals

Abstract

The utility model relates to the technical field of escalator parts, and provides an escalator step chain roller with double sealing, which comprises a main body component, a roller body, a bearing core, a rim and an end cover, and is characterized in that the main body component comprises a roller body, a bearing core, a rim and an end cover; the bearing core is nested in a central shaft hole of the roller body, the wheel flange is integrally formed on an outer ring of the roller body, and the end covers are fixed to the two sides of the roller body through bolts. The sealing assembly comprises a main sealing ring, an auxiliary sealing ring, a gas storage cavity and an elastic compensation piece; the main sealing ring is embedded in the attaching face of the roller body and the end cover, and the auxiliary sealing ring is arranged on the outer ring of the bearing core in a sleeving mode. Through the arrangement of the sealing assembly and the auxiliary matching between the pressure release valve and the elastic compensation piece, when the roller body runs, the air pressure difference of the air storage cavity can be used for preventing external impurities from invading, meanwhile, circulating sealing of lubricating oil is achieved through the oil guide groove, and the problems that sealing of a traditional roller body is easy to be single and easy to fail are solved.

Description

Technical Field

[0001] This utility model relates to the technical field of escalator components, and in particular to an escalator step chain roller with double sealing. Background Technology

[0002] The escalator step chain rollers are a key component for escalator operation, as they need to bear the weight of the steps and roll on the guide rails for extended periods.

[0003] The existing roller sealing structure is mostly a single rubber sealing ring design, which is prone to sealing failure in dusty or humid environments, leading to lubricating oil leakage and impurity intrusion. This not only shortens the service life of the roller, but may also cause safety hazards such as abnormal operating noise or jamming. Utility Model Content

[0004] The purpose of this invention is to provide an escalator step chain roller with double sealing, in order to solve the defects of existing escalator step chain rollers with double sealing, which have insufficient sealing performance and are easily affected by the environment.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: an escalator step chain roller with double sealing, comprising;

[0006] Main components: The main components include the roller body, bearing core, rim, and end cap;

[0007] The bearing core is nested in the central shaft hole of the roller body, the rim is integrally formed on the outer ring of the roller body, and the end cap is fixed to both sides of the roller body by bolts;

[0008] Sealing assembly: The sealing assembly includes a main sealing ring, a secondary sealing ring, an air storage cavity, and an elastic compensation component;

[0009] The main sealing ring is embedded in the mating surface of the roller body and the end cover, the secondary sealing ring is sleeved on the outer ring of the bearing core, the air storage cavity is opened between the main sealing ring and the secondary sealing ring, and the elastic compensation element is connected to the inner wall of the secondary sealing ring.

[0010] Preferably, the sealing assembly further includes a pressure relief valve, a dust lip, and an oil guide groove;

[0011] The pressure relief valve extends through the side wall of the end cap, the dustproof lip is integrally formed on the edge of the secondary sealing ring, and the oil guide groove is spirally formed on the surface of the bearing core.

[0012] Preferably, the elastic compensation component is a wave spring, with its two ends abutting against the inner wall of the secondary sealing ring and the roller body, respectively.

[0013] Preferably, the main sealing ring is made of hydrogenated nitrile rubber, and the cross-section of the main sealing ring is stepped, forming a labyrinthine fit with the end cap.

[0014] Preferably, the main body component further includes a wear-resistant bushing and reinforcing ribs;

[0015] The wear-resistant bushing is embedded on the inner side of the wheel rim, and the reinforcing ribs are evenly distributed on the spokes of the roller body.

[0016] Preferably, it also includes monitoring components;

[0017] The monitoring components include a pressure sensor, a signal transmitter, and an alarm ring;

[0018] The pressure sensor is installed on the inner wall of the gas storage chamber, the signal transmitter is fixed on the outer side of the end cover, and the warning ring is affixed to the end face of the wheel rim.

[0019] Preferably, the monitoring component further includes a temperature sensor;

[0020] The temperature sensor is attached to the surface of the bearing core, and the color of the temperature sensor can change from red to yellow to green as the temperature changes.

[0021] The present invention provides an escalator step chain roller with double sealing, the advantages of which are:

[0022] This invention, by setting a sealing component and through the auxiliary cooperation between the pressure relief valve and the elastic compensation component, can prevent external impurities from entering by utilizing the air pressure difference in the air storage chamber when the roller body is running. At the same time, it achieves the circulation and sealing of lubricating oil through the oil guide groove, thus solving the problems of the traditional roller body seal being easy to be singular and easy to fail.

[0023] Based on the aforementioned beneficial effects, a monitoring component is provided. Through the auxiliary cooperation between the pressure sensor and the signal transmitter, the warning ring and the temperature sensing plate can change color according to the running status of the roller body and the sealing effect. Attached Figure Description

[0024] Figure 1 This is an axonometric view of the present invention;

[0025] Figure 2 This is a three-dimensional disassembled schematic diagram of the roller body of this utility model;

[0026] Figure 3 This is a three-dimensional disassembled schematic diagram of the bearing core of this utility model;

[0027] Figure 4 This is a three-dimensional schematic diagram of the end cap of this utility model;

[0028] Figure 5 This is another isometric view of the present invention.

[0029] Explanation of the reference numerals in the figure:

[0030] 11. Roller body; 12. Bearing core; 13. Rim; 14. End cap; 15. Wear-resistant bushing; 16. Reinforcing rib;

[0031] 21. Main sealing ring; 22. Secondary sealing ring; 23. Air storage chamber; 24. Elastic compensation component; 25. Pressure relief valve; 26. Dustproof lip; 27. Oil guide groove;

[0032] 31. Pressure sensor; 32. Signal transmitter; 33. Warning ring; 34. Temperature sensor. Detailed Implementation

[0033] 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 protection scope of the present utility model.

[0034] Please see Figures 1-4 This utility model provides a double-sealed escalator step chain roller, comprising:

[0035] Main components: The main components include roller body 11, bearing core 12, rim 13 and end cap 14;

[0036] The bearing core 12 is nested in the central shaft hole of the roller body 11, the rim 13 is integrally formed on the outer ring of the roller body 11, and the end cap 14 is fixed to both sides of the roller body 11 by bolts.

[0037] The main components also include wear-resistant bushings 15 and reinforcing ribs 16;

[0038] Wear-resistant bushing 15 is embedded in the inner side of the rim 13, and reinforcing ribs 16 are evenly distributed on the spokes of the roller body 11.

[0039] Among them, the bearing core 12 is made of high carbon chromium bearing steel, the surface of the wheel rim 13 is coated with a ceramic wear-resistant layer, the wear-resistant bushing 15 can reduce the friction coefficient between the wheel rim and the guide rail, and the reinforcing rib 16 can improve the deformation resistance of the roller body 11. The contact surface between the end cap 14 and the roller body 11 is precision ground.

[0040] Sealing assembly: The sealing assembly includes a main sealing ring 21, a secondary sealing ring 22, an air storage chamber 23, and an elastic compensation element 24;

[0041] The main sealing ring 21 is fitted into the mating surface of the roller body 11 and the end cover 14, the secondary sealing ring 22 is sleeved on the outer ring of the bearing core 12, the air storage cavity 23 is opened between the main sealing ring 21 and the secondary sealing ring 22, and the elastic compensation member 24 is connected to the inner wall of the secondary sealing ring 22.

[0042] The sealing assembly also includes a pressure relief valve 25, a dust lip 26, and an oil guide groove 27;

[0043] The pressure relief valve 25 extends through the side wall of the end cover 14, the dust lip 26 is integrally formed on the edge of the secondary sealing ring 22, and the oil guide groove 27 is spirally opened on the surface of the bearing core 12.

[0044] The elastic compensating member 24 is a wave spring. The two ends of the elastic compensating member 24 abut against the inner wall of the secondary sealing ring 22 and the roller body 11, respectively. The main sealing ring 21 is made of hydrogenated nitrile rubber. The cross section of the main sealing ring 21 is stepped and forms a labyrinth fit with the end cap 14.

[0045] With the auxiliary cooperation between the pressure relief valve 25 and the elastic compensation component 24, the air pressure difference of the air storage chamber 23 can be used to block the intrusion of external impurities when the roller body 11 is running.

[0046] Working principle: During the operation of the roller body 11;

[0047] First, the stepped structure of the main sealing ring 21 and the end cap 14 can form three annular labyrinths, using the air damping effect to block dust intrusion. At the same time, the secondary sealing ring 22 is always in contact with the bearing core 12 under the thrust of the elastic compensation component 24, so that the dustproof lip 26 installed on the edge of the secondary sealing ring 22 can scrape off the fine impurities attached to the bearing core 12.

[0048] Next, when the roller body 11 rotates at high speed, the air in the air storage chamber 23 forms a high-pressure zone due to centrifugal force, creating a pressure difference with the outside to further enhance the sealing effect. When the oil guide groove 27 rotates with the bearing core 12, it can evenly guide the lubricating oil into the sealing surface to form an oil film. At the same time, excess grease can be automatically discharged through the pressure relief valve 25 to avoid excessive pressure in the sealing chamber.

[0049] This step allows the air pressure difference in the air storage chamber 23 to prevent external impurities from entering during the operation of the roller body 11, while the circulation and sealing of lubricating oil are achieved through the oil guide groove 27, thereby increasing the overall sealing performance of the roller body 11.

[0050] Please see Figure 2-5 As shown, this embodiment, based on the above embodiment, also includes a monitoring component;

[0051] The monitoring components include a pressure sensor 31, a signal transmitter 32, and an alarm ring 33;

[0052] Pressure sensor 31 is installed on the inner wall of air storage chamber 23, signal transmitter 32 is fixed on the outer side of end cover 14, and warning ring 33 is affixed to the end face of wheel rim 13.

[0053] The monitoring components also include a temperature sensor 34;

[0054] Temperature sensor 34 is attached to the surface of bearing core 12, and the color of temperature sensor 34 can change from red to yellow to green as the temperature changes.

[0055] The temperature sensor 34 can change color gradually from red to yellow to green depending on the temperature. Green indicates that the temperature is normal and less than or equal to 60 degrees Celsius. Yellow is a warning and the temperature is between 60 and 80 degrees Celsius. Red indicates that the temperature is above the limit and greater than or equal to 80 degrees Celsius.

[0056] With the assistance of the pressure sensor 31 and the signal transmitter 32, the warning ring 33 and the temperature sensing plate 34 can change color according to the running state of the roller body 11 and the sealing effect.

[0057] Working principle: During the daily operation monitoring of roller body 11;

[0058] First, a pressure sensor 31 is fixedly connected to the inner wall of the air storage chamber 23. The pressure sensor 31 can detect the pressure value in the air storage chamber 23 in real time. When the main sealing ring 21 and the secondary sealing ring 22 wear down and the pressure drops beyond the threshold, the signal transmitter 32 can immediately send a wireless warning signal to the escalator control system.

[0059] Next, maintenance personnel can observe the warning ring 33 on the end face of the wheel flange 13. The warning ring 33 is green under normal conditions and turns red when the seal fails, which can quickly identify the faulty roller. At the same time, a temperature sensing plate 34 is attached to the surface of the bearing core 12. The temperature sensing plate 34 can directly reflect the working temperature of the bearing core 12. The color of the temperature sensing plate 34 is green to indicate normal, yellow for warning, and red for exceeding the limit, which makes it easy for maintenance personnel to detect abnormal wear in time.

[0060] This step allows maintenance personnel to quickly determine the sealing condition and operating temperature of the rollers.

[0061] Although the present invention 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 the present invention should be included within the protection scope of the present invention.

Claims

1. An escalator step chain roller with double sealing, characterized in that, include: Main components: The main components include a roller body (11), a bearing core (12), a rim (13), and an end cap (14); The bearing core (12) is nested in the central shaft hole of the roller body (11), the rim (13) is integrally formed on the outer ring of the roller body (11), and the end cap (14) is fixed to both sides of the roller body (11) by bolts; Sealing assembly: The sealing assembly includes a main sealing ring (21), a secondary sealing ring (22), an air storage chamber (23), and an elastic compensating member (24); The main sealing ring (21) is fitted on the mating surface of the roller body (11) and the end cover (14), the secondary sealing ring (22) is sleeved on the outer ring of the bearing core (12), the air storage cavity (23) is opened between the main sealing ring (21) and the secondary sealing ring (22), and the elastic compensation member (24) is connected to the inner wall of the secondary sealing ring (22).

2. The escalator step chain roller with double sealing according to claim 1, characterized in that, The sealing assembly also includes a pressure relief valve (25), a dust lip (26), and an oil guide groove (27); The pressure relief valve (25) extends through the side wall of the end cap (14), the dust lip (26) is integrally formed on the edge of the secondary sealing ring (22), and the oil guide groove (27) is spirally opened on the surface of the bearing core (12).

3. The escalator step chain roller with double sealing according to claim 2, characterized in that, The elastic compensating member (24) is a wave spring, and the two ends of the elastic compensating member (24) abut against the inner wall of the secondary sealing ring (22) and the roller body (11), respectively.

4. The escalator step chain roller with double sealing according to claim 2, characterized in that, The main sealing ring (21) is made of hydrogenated nitrile rubber, and the cross section of the main sealing ring (21) is stepped and forms a labyrinth fit with the end cap (14).

5. The escalator step chain roller with double sealing according to claim 1, characterized in that, The main component also includes a wear-resistant bushing (15) and a reinforcing rib (16); The wear-resistant bushing (15) is inlaid on the inner side of the rim (13), and the reinforcing ribs (16) are evenly distributed on the spokes of the roller body (11).

6. The escalator step chain roller with double sealing according to claim 1, characterized in that, It also includes monitoring components; The monitoring components include a pressure sensor (31), a signal transmitter (32), and a warning ring (33); The pressure sensor (31) is installed on the inner wall of the gas storage chamber (23), the signal transmitter (32) is fixed on the outer side of the end cover (14), and the warning ring (33) is pasted on the end face of the wheel rim (13).

7. The escalator step chain roller with double sealing according to claim 6, characterized in that, The monitoring component also includes a temperature sensor (34); The temperature sensing element (34) is attached to the surface of the bearing core (12), and the color of the temperature sensing element (34) can change from red to yellow to green as the temperature changes.

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