A long-life idler roller

Abstract

This utility model discloses a long-service-life idler roller, belonging to the field of conveyor idler rollers. It includes a roller shaft and a cylinder. The key feature is that a core is filled between the roller shaft and the cylinder, with the outer side of the core fitting against the inner side of the cylinder. Bearing seats are installed at both ends of the core along its length, and bearing components are installed within the bearing seats. By filling the space between the roller shaft and the cylinder with a core, the gas originally located between the roller shaft and the cylinder can be discharged, thereby reducing the amount of gas exchange between the inside and outside of the idler roller during high-speed rotation. This reduces the loss of lubricating oil and the impact of impurities in the gas on the bearings, extending the bearing's service life. This solves the problem that when the idler roller rotates at high speed, the increased internal and external airflow leads to a reduced bearing life and a significant increase in rotational resistance.

Description

Technical Field

[0001] This utility model relates to a conveyor idler roller, and more particularly to an idler roller with a long service life. Background Technology

[0002] Existing belt conveyors use idlers, whether they are conventional steel idlers, polymer idlers, ceramic idlers, or idlers made of other materials. The structure of an idler mainly consists of an idler cylinder, bearing housing, bearings, shaft, and seals. Due to the difference in the inner and outer diameters of the bearings, a cavity is formed between the cylinder and the shaft. When the idler rotates at high speed, the heat generated by friction causes temperature changes, leading to a pressure difference between the internal cavity and the external space. This results in increased gas flow between the inside and outside of the idler. Since the gas exchange between the inside and outside of the idler needs to pass through the bearings, this accelerates the loss of lubricating fluid, contaminates the internal structure of the bearings, and significantly reduces the service life of the bearings. Furthermore, it increases the resistance during idler rotation, making it difficult to use in high-speed conveying environments, and the increased resistance makes the idler more prone to damage.

[0003] For example, a "roller" disclosed in Chinese patent literature, publication number CN212023902U, includes a roller shaft and a roller. The roller and roller shaft are connected by bearings. Slots are provided near both ends of the roller shaft, and a retaining shaft, which is cylindrical, is located radially inside the slots. The drawback of this patent is that when the roller rotates at high speed, friction causes a pressure difference to form inside and outside the roller, increasing the amount of gas exchange between the inside and outside of the roller. This accelerates the loss of lubricating fluid, contaminates the internal structure of the bearing, and consequently significantly reduces the bearing's service life and increases the resistance during roller rotation. Utility Model Content

[0004] This invention aims to overcome the problem in the prior art where, when the idler roller rotates at high speed, the large internal and external airflow causes the bearings to be easily contaminated, resulting in a reduced bearing life and a significant increase in rotational resistance. The invention provides an idler roller with a long service life, ensuring that the bearings maintain a longer service life and are less prone to damage even at high speeds, thereby improving the service life of the idler roller and reducing replacement and maintenance costs.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: This utility model discloses a long-service-life idler roller, comprising a roller shaft and a cylinder body, wherein a core is filled between the roller shaft and the cylinder body, the outer side of the core body is fitted with the inner side of the cylinder body, and bearing seats are installed at both ends of the core body in the length direction, and bearing components are installed in the bearing seats.

[0006] In this application, by filling the space between the roller shaft and the cylinder with a core, the gas originally located between the roller shaft and the cylinder can be discharged, thereby reducing the amount of gas exchange between the inside and outside when the idler roller rotates at high speed. This reduces the amount of lubricating oil loss and the impact of impurities in the gas on the bearing, extending the bearing's service life. Furthermore, it reduces the noise generated by gas flow.

[0007] Preferably, a sealing assembly is also installed inside the bearing housing on the outer side of the bearing component.

[0008] Preferably, a bearing protective cover is also installed on the roller shaft, and the bearing housing protective cover is located on the outside of the bearing housing. The bearing housing protective cover prevents moisture, dust, and other contaminants from directly entering the bearing components, further improving the service life of the bearing components.

[0009] Preferably, the bearing housing is an external heat dissipation bearing housing, and an annular groove is provided on the outer side of the external heat dissipation bearing housing, and the bearing protective cover includes a protective cover extension.

[0010] Preferably, there are several extensions, which are evenly distributed in the circumferential direction of the bearing protective cover. Rotation of the extensions can agitate the gas within the annular groove, thereby improving heat dissipation.

[0011] Preferably, the external heat dissipation bearing housing is provided with a flange structure.

[0012] Preferably, the sealing assembly includes an outer sealing ring and an inner sealing ring that fit together.

[0013] Preferably, a retaining ring is installed on the roller shaft on the outside of the bearing component.

[0014] Preferably, the contact area between the core and the bearing seat is provided with an interlocking structure.

[0015] Therefore, this utility model has the following beneficial effects: (1) extending the service life of the bearing inside the idler roller; (2) reducing the noise generated when the idler roller rotates at high speed; 3.1 reducing the rotational resistance of the idler roller, improving the service life of the conveyor belt, and reducing the useless energy consumption of the drive. Attached Figure Description

[0016] Figure 1 This is a structural schematic diagram of one embodiment of the present utility model.

[0017] Figure 2 This is a structural schematic diagram of a second embodiment of the present invention.

[0018] Figure 3 This is a structural schematic diagram of Embodiment 3 of this utility model.

[0019] Figure 4 This is a structural schematic diagram of Embodiment 4 of the present invention.

[0020] Figure 5 This is a cross-sectional schematic diagram of the bearing housing protective cover at point AA in this utility model.

[0021] In the figure: 1. Idler roller shaft; 2. Cylinder body; 3. Bearing housing; 3.1 External heat dissipation bearing housing; 4. Cylinder core; 5. Sealing assembly; 6. Bearing housing protective cover; 7. Snap ring; 8. Cylinder core shaft hole; 9. Annular groove; 10. Main body of protective cover; 11. Extension of protective cover; 12. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0023] Example 1, as Figure 1 As shown, this is a novel long-life idler roller with an added core 5 to a conventional idler roller. It includes an idler roller shaft 1, a cylinder 2, a bearing housing 3, a bearing 4, a core 5, and a sealing assembly 6. The core 5 is filled between the idler roller shaft 1 and the cylinder 2. The sealing assembly includes an outer sealing ring and an inner sealing ring that fit together.

[0024] The core 5 described in this embodiment is an approximately cylindrical structure with a central cylindrical hole. The core 5 is made of a low-density, non-deformable foam material, such as EPS expandable polystyrene, XPS extruded polystyrene, or popcorn foam. The outer diameter of the core 5 is slightly larger than the inner diameter of the cylinder 2, ensuring that the outer side of the core 5 fits snugly against the inner side of the cylinder 2 while still allowing it to be inserted. The inner diameter of the central hole of the core 5 is slightly larger than the outer diameter of the roller shaft 1. This minimizes the gap between the core 5 and the roller shaft 1, ensuring that the roller shaft 1 does not contact the core 5. Preferably, the gap is designed to be between 0.5 and 1.5 mm. The core 5 serves three main purposes: First, when installed, it can expel over 95% of the air from the cylinder 2. When the idler roller is in operation, the airflow into and out of the roller is reduced by over 95%, significantly reducing the amount of harmful substances like water vapor and dust entering the bearing. This also greatly reduces the loss of lubricating grease in the bearing, significantly extending its service life and consequently the roller's lifespan. Second, the foam material has excellent sound insulation properties and a certain degree of sound absorption and noise reduction, which can reduce roller vibration and bearing 4 rotation. Noise is generated during operation, and due to the filling effect of the core 5, the "empty effect" inside the idler roller can be avoided, further reducing the noise during idler roller operation; third, the foam material itself has a heat insulation effect. When the idler roller is working, the heat generated by the friction between the conveyor belt and the cylinder 2 is not easily transferred to the gas inside the idler roller due to the obstruction of the core 5. In addition, the heat generated at the bearing is also not easily transferred to the inside of the idler roller due to the obstruction of the core 5. Due to the obstruction effect of the core 5, the temperature change inside the idler roller is greatly reduced, thereby reducing the air pressure difference inside and outside the idler roller, and further reducing the amount of gas entering and exiting the idler roller.

[0025] The cylindrical core 5 has bearing seats 3 installed at both ends in the length direction, and bearings 4 are installed inside the bearing seats 3. The contact area between the cylindrical core 5 and the bearing seats 3 is provided with an interlocking structure. A retaining spring 11 for positioning and clamping the bearing 4 is installed on the outside of the bearing 4.

[0026] When applied to ordinary belt conveyors, the idler structure of this application can improve the service life of the belt conveyor, reduce the operation and maintenance costs, and reduce the vibration and noise of the belt conveyor. When applied to conveyors in high temperature, high cold, high humidity, or high dust conditions, the service life of the idler is much longer than that of existing idler structures, the replacement frequency of the idler is greatly reduced, and the maintenance work and costs are greatly reduced. When applied to high-speed conveyors, the service life of the idler is also significantly improved compared to existing idler structures.

[0027] Example 2, as Figure 2As shown, this is a novel long-life idler roller with an outer edge inwardly flanged type external heat dissipation bearing seat and a cylindrical core combination. It includes an idler roller shaft 1, a cylindrical body 2, an external heat dissipation bearing seat 3.1, a bearing 4, a cylindrical core 5, and a sealing assembly 6. The cylindrical core 5 is filled between the idler roller shaft 1 and the cylindrical body 2, and the external heat dissipation bearing seat 3.1 is symmetrically installed at both ends of the cylindrical body 2.

[0028] The core 5 described in this embodiment is an approximately cylindrical structure with a central cylindrical hole. The core 5 is made of a low-density, non-deformable foam material, such as expandable polystyrene (EPS), extruded polystyrene (XPS), or popcorn foam. The outer diameter of the core 5 is slightly larger than the inner diameter of the cylinder 2, ensuring that the outer side of the core 5 fits snugly against the inner side of the cylinder 2 while still allowing it to be inserted. The inner diameter of the central hole of the core 5 is slightly larger than the outer diameter of the roller shaft 1. This minimizes the gap between the core 5 and the roller shaft 1, ensuring that the roller shaft 1 does not contact the core 5. Preferably, the gap is designed to be between 0.5 and 1.5 mm. The core 5 serves three main purposes: First, when installed, it can expel over 95% of the air from the cylinder 2. When the idler roller is in operation, the airflow into and out of the roller is reduced by over 95%, significantly reducing the amount of harmful substances like water vapor and dust entering the bearing. This also greatly reduces the loss of lubricating grease in the bearing, significantly extending its service life and consequently the idler roller's lifespan. Second, the foam material has excellent sound insulation properties and a certain degree of sound absorption and noise reduction, reducing roller vibration and noise generated during bearing 4 rotation. Furthermore, the filling effect of the core 5... First, it can avoid the "void effect" inside the idler roller, further reducing the noise during idler roller operation. Second, the foam material itself has a heat insulation effect. When the idler roller is working, the heat generated by the friction between the conveyor belt and the cylinder 2 is not easily transferred to the gas inside the idler roller due to the obstruction of the cylinder core 5. In addition, the heat generated at the bearing is also not easily transferred to the inside of the idler roller due to the obstruction of the cylinder core 5. Due to the obstruction effect of the cylinder core 5, the temperature change inside the idler roller is greatly reduced, thereby reducing the air pressure difference inside and outside the idler roller, further reducing the amount of gas entering and leaving the idler roller. As a result, the service life of the bearing is improved to a certain extent, and thus the service life of the idler roller is also extended to a certain extent.

[0029] The cylindrical core 5 has bearing seats 3 installed at both ends in the length direction, and bearings 4 are installed inside the bearing seats 3. The contact area between the cylindrical core 5 and the bearing seats 3 is provided with an interlocking structure. A retaining spring 11 for positioning and clamping the bearing 4 is installed on the outside of the bearing 4.

[0030] The external heat dissipation bearing housing 3.1 described in this embodiment is an external heat dissipation bearing housing with an inner flanged outer edge. The middle part of the external heat dissipation bearing housing 3.1 is a cavity structure for mounting the bearing 4 and the sealing assembly 6. The outer edge of the flanged outer edge is connected to the cylinder 2. The cavity in the middle of the bearing housing is embedded inside the outer edge of the bearing housing with an inner flanged outer edge. An annular groove 10 for heat dissipation is provided between the cavity in the middle of the bearing housing and the outer edge. The material of the external heat dissipation bearing housing 3.1 is metal to ensure good heat dissipation effect, while ensuring the rigidity of the external heat dissipation bearing housing 3.1 to fully play its radial support role. The outer heat dissipation bearing housing 3.1 with an inner flanged outer edge has the following advantages: First, since the annular groove 10 is an open space, the heat generated at the bearing 4 during the operation of the idler roller can be quickly dissipated into the external environment. This results in a smaller temperature rise at the outer heat dissipation bearing housing 3.1 under the same working conditions, a slower rate of evaporation and deterioration of the lubricating oil at the bearing 4, and a longer effective lubrication time, thus extending the service life of the bearing 4 and the idler roller. Second, since the annular groove 10 is an open space, the heat generated at the bearing 4 during the operation of the idler roller can be quickly dissipated into the external environment, resulting in a smaller temperature rise of the gas inside the idler roller. This results in a smaller pressure difference between the inside and outside of the idler roller, less gas passing through the bearing 4, and the bearing 4 is less likely to be contaminated by water vapor, dust, etc., thus extending the service life of the bearing 4 and the idler roller. Third, the outer edge of the outer heat dissipation bearing housing 3.1 with an inner flanged outer edge has a larger contact area with the cylinder 2. Under the same force, the pressure on the contact surface will be lower, the stability of the connection between the two will be better, and the service life of the idler roller will be extended.

[0031] In this embodiment, a bearing housing protective cover 7 is also installed on the idler roller shaft 1. The bearing housing protective cover 7 is located outside the outer heat dissipation bearing housing 3.1 and is fixed on the idler roller shaft 1. The main body 11 of the bearing housing protective cover 7 has a circular structure in the middle, and several protective cover extensions 12 are evenly distributed in the circumferential direction on the outer edge. It has two main functions: First, the main body 11 of the protective cover in the middle can cover the bearing cavity opening of the outer heat dissipation bearing housing 3.1, so as to prevent water, particles and other external objects from directly impacting the sealing component 6, thus providing a certain degree of protection for the bearing seal. Second, the several protective cover extensions 12 evenly distributed in the circumferential direction can disturb the gas at the position of the annular groove 10 when the idler roller is working, thereby improving the heat dissipation effect of the outer heat dissipation bearing housing 3.1. At the same time, this petal structure can also remove liquids, dust and other substances harmful to the bearing that accumulate in the annular groove 10, thus playing a certain cleaning role for the outer heat dissipation bearing housing 3.1.

[0032] The idler structure of this application, when applied to ordinary belt conveyors, can improve the service life of the belt conveyor, reduce the operation and maintenance costs, and reduce the vibration and noise of the belt conveyor. When applied to conveyors in high-temperature, high-cold, high-humidity, or high-dust conditions, the service life of the idler is much longer than that of existing idler structures, the replacement frequency of the idler is greatly reduced, the maintenance workload and costs are greatly reduced, the operating costs of the equipment are also reduced to a certain extent, and the operating noise of the conveyor is reduced to a certain extent. When applied to high-speed conveyors, the service life of the idler is longer than that of existing structures. The structured idler rollers significantly improve performance, greatly reduce the frequency of idler roller replacement, and significantly reduce maintenance workload and costs. The operating noise of the conveyor is also significantly reduced, leading to a certain decrease in operating costs. Furthermore, conveyors using the idler rollers described in this application experience a reduction in the average running resistance of the idler rollers, extending the service life of the conveyor belt. When applied to silent idler rollers made of industrial polymer materials, the service life of the idler rollers is significantly extended compared to existing silent idler rollers, especially when used in conveyors with higher operating speeds, where the long service life advantage of the idler rollers described in this application becomes even more pronounced.

[0033] Example 3, as Figure 3 As shown, this is a novel long-life idler roller with an outer edge flanged type external heat dissipation bearing seat and a cylindrical core combination. It includes an idler roller shaft 1, a cylindrical body 2, an external heat dissipation bearing seat 3.1, a bearing 4, a cylindrical core 5, and a sealing assembly 6. The cylindrical core 5 is filled between the idler roller shaft 1 and the cylindrical body 2, and the external heat dissipation bearing seat 3.1 is symmetrically installed at both ends of the cylindrical body 2.

[0034] The core 5 described in this embodiment is an approximately cylindrical structure with a central cylindrical hole. The core 5 is made of a low-density, non-deformable foam material, such as expandable polystyrene (EPS), extruded polystyrene (XPS), or popcorn foam. The outer diameter of the core 5 is slightly larger than the inner diameter of the cylinder 2, ensuring that the outer side of the core 5 fits snugly against the inner side of the cylinder 2 while still allowing it to be inserted. The inner diameter of the central hole of the core 5 is slightly larger than the outer diameter of the roller shaft 1. This minimizes the gap between the core 5 and the roller shaft 1, ensuring that the roller shaft 1 does not contact the core 5. Preferably, the gap is designed to be between 0.5 and 1.5 mm. The core 5 serves three main purposes: First, when installed, it can expel over 95% of the air from the cylinder 2. When the idler roller is in operation, the airflow into and out of the roller is reduced by over 95%, significantly reducing the amount of harmful substances like water vapor and dust entering the bearing. This also greatly reduces the loss of lubricating grease in the bearing, significantly extending its service life and consequently the idler roller's lifespan. Second, the foam material has excellent sound insulation properties and a certain degree of sound absorption and noise reduction, reducing roller vibration and noise generated during bearing 4 rotation. Furthermore, the filling effect of the core 5... First, it can avoid the "void effect" inside the idler roller, further reducing the noise during idler roller operation. Second, the foam material itself has a heat insulation effect. When the idler roller is working, the heat generated by the friction between the conveyor belt and the cylinder 2 is not easily transferred to the gas inside the idler roller due to the obstruction of the cylinder core 5. In addition, the heat generated at the bearing is also not easily transferred to the inside of the idler roller due to the obstruction of the cylinder core 5. Due to the obstruction effect of the cylinder core 5, the temperature change inside the idler roller is greatly reduced, thereby reducing the air pressure difference inside and outside the idler roller, further reducing the amount of gas entering and leaving the idler roller. As a result, the service life of the bearing is improved to a certain extent, and thus the service life of the idler roller is also extended to a certain extent.

[0035] The cylindrical core 5 has bearing seats 3 installed at both ends in the length direction, and bearings 4 are installed inside the bearing seats 3. The contact area between the cylindrical core 5 and the bearing seats 3 is provided with an interlocking structure. A retaining spring 11 for positioning and clamping the bearing 4 is installed on the outside of the bearing 4.

[0036] The external heat dissipation bearing housing 3.1 described in this embodiment is an external heat dissipation bearing housing with an outwardly flanged structure. The middle part of the external heat dissipation bearing housing 3.1 is a cavity structure for mounting the bearing 4 and the sealing assembly 6. The outer edge of the flanged structure is connected to the cylinder 2. The cavity in the middle of the bearing housing is mainly located on the outer side of the outer edge. An annular groove 10 for heat dissipation is provided between the cavity in the middle of the bearing housing and the cylinder 2. The external heat dissipation bearing housing 3.1 is made of metal to ensure good heat dissipation effect and rigidity, so as to fully play its radial support role. The external heat dissipation bearing housing 3.1 with an outer flange structure has the following advantages: First, since the annular groove 10 is an open space, the heat generated at the bearing 4 during the operation of the idler roller can be quickly dissipated into the external environment. This results in a smaller temperature rise at the external heat dissipation bearing housing 3.1 under the same working conditions, a slower rate of evaporation and deterioration of the lubricating oil at the bearing 4, and a longer effective lubrication time, thereby extending the service life of the bearing 4 and the idler roller. Second, since the annular groove 10 is an open space, the heat generated at the bearing 4 during the operation of the idler roller can be quickly dissipated into the external environment, resulting in a smaller temperature rise of the gas inside the idler roller. This results in a smaller pressure difference between the inside and outside of the idler roller, less gas passing through the bearing 4, and the bearing 4 is less likely to be contaminated by water vapor, dust, etc., thus extending the service life of the bearing 4 and the idler roller. Third, the outer edge of the external heat dissipation bearing housing 3.1 with an outer flange structure has a larger contact area with the cylinder 2. Under the same force, the pressure on the contact surface will be lower, the stability of the connection between the two will be better, and the service life of the idler roller will be extended.

[0037] In this embodiment, a bearing housing protective cover 7 is also installed on the idler roller shaft 1. The bearing housing protective cover 7 is located outside the outer heat dissipation bearing housing 3.1 and is fixed on the idler roller shaft 1. The main body 11 of the bearing housing protective cover 7 has a circular structure in the middle, and several protective cover extensions 12 are evenly distributed in the circumferential direction on the outer edge. It has two main functions: First, the main body 11 of the protective cover in the middle can cover the bearing cavity opening of the outer heat dissipation bearing housing 3.1, so as to prevent water, particles and other external objects from directly impacting the sealing component 6, thus providing a certain degree of protection for the bearing seal. Second, the several protective cover extensions 12 evenly distributed in the circumferential direction can disturb the gas at the position of the annular groove 10 when the idler roller is working, thereby improving the heat dissipation effect of the outer heat dissipation bearing housing 3.1. At the same time, this petal structure can also remove liquids, dust and other substances harmful to the bearing that accumulate in the annular groove 10, thus playing a certain cleaning role for the outer heat dissipation bearing housing 3.1.

[0038] The idler structure of this application, when applied to ordinary belt conveyors, can improve the service life of the belt conveyor, reduce the operation and maintenance costs, and reduce the vibration and noise of the belt conveyor. When applied to conveyors in high-temperature, high-cold, high-humidity, or high-dust conditions, the service life of the idler is much longer than that of existing idler structures, the replacement frequency of the idler is greatly reduced, the maintenance workload and costs are greatly reduced, the operating costs of the equipment are also reduced to a certain extent, and the operating noise of the conveyor is reduced to a certain extent. When applied to high-speed conveyors, the service life of the idler is longer than that of existing structures. The structured idler rollers significantly improve performance, greatly reduce the frequency of idler roller replacement, and significantly reduce maintenance workload and costs. The operating noise of the conveyor is also significantly reduced, leading to a certain decrease in operating costs. Furthermore, conveyors using the idler rollers described in this application experience a reduction in the average running resistance of the idler rollers, extending the service life of the conveyor belt. When applied to silent idler rollers made of industrial polymer materials, the service life of the idler rollers is significantly extended compared to existing silent idler rollers, especially when used in conveyors with higher operating speeds, where the long service life advantage of the idler rollers described in this application becomes even more pronounced.

[0039] Example 4, as Figure 4 As shown, this is a novel long-life idler roller with an outer heat dissipation bearing seat and a cylindrical core, which has no flange on the outer edge. It includes an idler roller shaft 1, a cylindrical body 2, an outer heat dissipation bearing seat 3.1, a bearing 4, a cylindrical core 5, and a sealing assembly 6. The cylindrical core 5 is filled between the idler roller shaft 1 and the cylindrical body 2, and the outer heat dissipation bearing seat 3.1 is symmetrically installed at both ends of the cylindrical body 2.

[0040] The core 5 described in this embodiment is an approximately cylindrical structure with a central cylindrical hole. The core 5 is made of a low-density, non-deformable foam material, such as expandable polystyrene (EPS), extruded polystyrene (XPS), or popcorn foam. The outer diameter of the core 5 is slightly larger than the inner diameter of the cylinder 2, ensuring that the outer side of the core 5 fits snugly against the inner side of the cylinder 2 while still allowing it to be inserted. The inner diameter of the central hole of the core 5 is slightly larger than the outer diameter of the roller shaft 1. This minimizes the gap between the core 5 and the roller shaft 1, ensuring that the roller shaft 1 does not contact the core 5. Preferably, the gap is designed to be between 0.5 and 1.5 mm. The core 5 serves three main purposes: First, when installed, it can expel over 95% of the air from the cylinder 2. When the idler roller is in operation, the airflow into and out of the roller is reduced by over 95%, significantly reducing the amount of harmful substances like water vapor and dust entering the bearing. This also greatly reduces the loss of lubricating grease in the bearing, significantly extending its service life and consequently the idler roller's lifespan. Second, the foam material has excellent sound insulation properties and a certain degree of sound absorption and noise reduction, reducing roller vibration and noise generated during bearing 4 rotation. Furthermore, the filling effect of the core 5... First, it can avoid the "void effect" inside the idler roller, further reducing the noise during idler roller operation. Second, the foam material itself has a heat insulation effect. When the idler roller is working, the heat generated by the friction between the conveyor belt and the cylinder 2 is not easily transferred to the gas inside the idler roller due to the obstruction of the cylinder core 5. In addition, the heat generated at the bearing is also not easily transferred to the inside of the idler roller due to the obstruction of the cylinder core 5. Due to the obstruction effect of the cylinder core 5, the temperature change inside the idler roller is greatly reduced, thereby reducing the air pressure difference inside and outside the idler roller, further reducing the amount of gas entering and leaving the idler roller. As a result, the service life of the bearing is improved to a certain extent, and thus the service life of the idler roller is also extended to a certain extent.

[0041] The cylindrical core 5 has bearing seats 3 installed at both ends in the length direction, and bearings 4 are installed inside the bearing seats 3. The contact area between the cylindrical core 5 and the bearing seats 3 is provided with an interlocking structure. A retaining spring 11 for positioning and clamping the bearing 4 is installed on the outside of the bearing 4.

[0042] The external heat dissipation bearing housing 3.1 described in this embodiment is an external heat dissipation bearing housing without an outer flange. The middle part of the external heat dissipation bearing housing 3.1 is a cavity structure for mounting the bearing 4 and the sealing assembly 6. The outer edge of the external heat dissipation bearing housing 3.1 is connected to the cylindrical body 2. The cavity in the middle of the bearing housing is mainly located outside the outer edge. An annular groove 10 for heat dissipation is provided between the cavity in the middle of the bearing housing and the cylindrical body 2. The material of the external heat dissipation bearing housing 3.1 is metal to ensure good heat dissipation effect, while ensuring the rigidity of the external heat dissipation bearing housing 3.1 to fully play its radial support role. The external heat dissipation bearing housing 3.1 without an outer flange has the following advantages: First, since the annular groove 10 is an open space, the heat generated at the bearing 4 during the operation of the idler roller can be quickly dissipated into the external environment. This results in a smaller temperature rise at the external heat dissipation bearing housing 3.1 under the same working conditions, a slower rate of evaporation and deterioration of the lubricating oil at the bearing 4, and a longer effective lubrication time, thereby extending the service life of the bearing 4 and the idler roller. Second, since the annular groove 10 is an open space, the heat generated at the bearing 4 during the operation of the idler roller can be quickly dissipated into the external environment, resulting in a smaller temperature rise of the gas inside the idler roller. This results in a smaller pressure difference between the inside and outside of the idler roller, less gas passing through the bearing 4, and the bearing 4 is less likely to be contaminated by water vapor, dust, etc., thus extending the service life of the bearing 4 and the idler roller.

[0043] In this embodiment, a bearing housing protective cover 7 is also installed on the idler roller shaft 1. The bearing housing protective cover 7 is located outside the outer heat dissipation bearing housing 3.1 and is fixed on the idler roller shaft 1. The main body 11 of the bearing housing protective cover 7 has a circular structure in the middle, and several protective cover extensions 12 are evenly distributed in the circumferential direction on the outer edge. It has two main functions: First, the main body 11 of the protective cover in the middle can cover the bearing cavity opening of the outer heat dissipation bearing housing 3.1, so as to prevent water, particles and other external objects from directly impacting the sealing component 6, thus providing a certain degree of protection for the bearing seal; Second, the protective cover extensions 12 evenly distributed in the circumferential direction on the outer edge can disturb the gas at the position of the annular groove 10 when the idler roller is working, thereby improving the heat dissipation effect of the outer heat dissipation bearing housing 3.1. At the same time, this petal structure can also remove liquids, dust and other substances harmful to the bearing that accumulate in the annular groove 10, thus playing a certain cleaning role for the outer heat dissipation bearing housing 3.1.

[0044] The idler structure of this application, when applied to ordinary belt conveyors, can improve the service life of the belt conveyor, reduce the operation and maintenance costs, and reduce vibration and noise. When applied to conveyors operating in high-temperature, high-cold, high-humidity, or high-dust conditions, the idler's service life is significantly longer than that of existing idler structures, greatly reducing the replacement frequency, maintenance workload, and maintenance costs, thus lowering equipment operating costs and conveyor noise. When applied to high-speed conveyors, the idler's service life is significantly longer than existing idler structures, with a significantly reduced replacement frequency, maintenance workload, and maintenance costs, and a substantial reduction in conveyor noise and operating costs. Furthermore, conveyors using the idler of this application exhibit reduced average running resistance of the idler, extending the conveyor belt's service life. The long service life advantage of this invention becomes even more pronounced in conveyors.

Claims

1. A long-service-life idler roller, comprising a roller shaft and a cylinder, characterized in that, A core is filled between the roller and the cylinder, the outer side of the core is in contact with the inner side of the cylinder, and bearing seats are installed at both ends of the core in the length direction, and bearing components are installed in the bearing seats.

2. The long-service-life idler roller according to claim 1, characterized in that, A sealing assembly is also installed inside the bearing housing on the outside of the bearing component.

3. The long-service-life idler roller according to claim 1, characterized in that, The roller is also equipped with a bearing protective cover, which is located on the outside of the bearing housing.

4. The long-service-life idler roller according to claim 3, characterized in that, The bearing housing is an external heat dissipation bearing housing, and an annular groove is provided on the outer side of the external heat dissipation bearing housing. The bearing protective cover includes a protective cover extension.

5. A long-service-life idler roller according to claim 4, characterized in that, There are several extensions, and the several protective cover extensions are evenly distributed in the circumferential direction of the bearing protective cover.

6. The long-service-life idler roller according to claim 4, characterized in that, The external heat dissipation bearing housing is provided with a flange structure.

7. A long-service-life idler roller according to claim 2, characterized in that, The sealing assembly includes an outer sealing ring and an inner sealing ring that fit together.

8. A long-service-life idler roller according to any one of claims 1-7, characterized in that, A retaining ring is installed on the roller shaft, located on the outside of the bearing component.

9. A long-service-life idler roller according to any one of claims 1-7, characterized in that, The core and the bearing housing are fitted with a fitting structure.

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