Cylindrical retainer of low-speed high-load energy-saving structure

Abstract

The invention relates to the technical field of retainers, and discloses a cylindrical retainer with a low-speed, high-load and energy-saving structure, a plurality of pockets and corresponding pocket beams are arranged on the cylindrical retainer, each pocket is formed between a first pocket beam and a second pocket beam, and a cylindrical roller is mounted at each pocket. In the opposite side faces of the first pocket beam and the second pocket beam, the side face of the first pocket beam is a contact face, the side face of the second pocket beam is a non-contact face, limiting protrusions are correspondingly arranged on the upper side edge and the lower side edge, close to the non-contact face, of a pocket, and a cylindrical roller installation space is formed between the limiting protrusions and the contact face. A set distance is formed between the limiting protrusion and the side face of the second pocket beam, a cavity structure is formed between the side, close to the first pocket beam, of the limiting protrusion and the side face of the second pocket beam, and an oil storage cavity is formed in the position, close to the cavity structure, of the inner side face of the retainer. Operation energy consumption can be reduced, and starting torque can be reduced.

Description

Technical Field

[0001] This invention relates to the field of cage technology, and in particular to a cylindrical cage with a low-speed, high-load, energy-saving structure. Background Technology

[0002] Industrial ceiling fans, as ventilation equipment for large spaces, are characterized by operating under low speed and high load conditions (continuously bearing the weight of the fan blades and airflow impact loads) for extended periods. They also rotate in only one direction, and during startup, they must overcome the inertia of the fan blades and airflow resistance. Existing cages are mostly symmetrical structures adapted for bidirectional rotation, using a double-sided gap design, which is not optimized for the specific operating conditions of unidirectional rotation in industrial ceiling fans. While double-sided contact cages offer strong torsional resistance, their large friction area increases energy consumption at low speeds and also increases the starting torque of the ceiling fan.

[0003] In addition, the grease in existing industrial ceiling fan bearings is prone to disorderly loss due to centrifugal force dispersion at low speeds, making it difficult to continuously replenish the core friction area (the contact surface between the roller and the cage). Although some cages are equipped with oil passages, these passages are mostly hidden small hole structures with limited oil storage capacity and unclear grease delivery paths. After long-term operation, dry friction is likely to occur, leading to increased bearing wear and the need for frequent shutdowns to replenish grease. Insufficient lubrication indirectly increases operating energy consumption. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the purpose of this invention is to provide a cylindrical cage with a low-speed, high-load, energy-saving structure that can reduce operating energy consumption and starting torque.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solution: A cylindrical cage with a low-speed, high-load, energy-saving structure is provided. The cylindrical cage has multiple pockets and corresponding pocket beams. Each pocket is formed between a first pocket beam and a second pocket beam. A cylindrical roller is installed in each pocket. Among the opposite sides of the first pocket beam and the second pocket beam, the side of the first pocket beam is a contact surface and the side of the second pocket beam is a non-contact surface. Limiting protrusions are provided on the upper and lower sides of the pockets near the non-contact surfaces. An installation space for the cylindrical roller is formed between the limiting protrusions and the contact surfaces. The limiting protrusions are at a set distance from the side of the second pocket beam. A cavity structure is formed between the side of the limiting protrusions near the first pocket beam and the side of the second pocket beam. An oil storage cavity is provided on the inner side of the cage near the cavity structure.

[0006] As a further implementation, the upper opening diameter and the lower opening diameter of the cylindrical cage are adapted to each other.

[0007] As a further implementation, a weight-reducing groove is provided on the outer side of the cylindrical retainer at the position between two adjacent pockets.

[0008] As a further implementation, the upper and lower ends of the weight-reducing groove extend to the upper and lower end faces of the cylindrical retainer, respectively.

[0009] As a further implementation, the inner side of the cylindrical retainer is provided with a vertically extending groove, and an oil storage cavity is formed in the groove.

[0010] As a further implementation, the upper end of the groove extends to the upper end face of the cylindrical retainer, and the lower end of the groove is located near the lower side of the pocket.

[0011] As a further implementation, the lower end of the groove is positioned higher than the lower side of the pocket, and the lower end of the groove is connected to the cavity structure.

[0012] As a further implementation, the distance between the limiting protrusion and the contact surface is adapted to the diameter of the cylindrical roller.

[0013] As a further implementation, a limiting block is provided on the contact surface. The limiting block is arc-shaped and is used to contact the cylindrical roller.

[0014] As a further implementation, a gap is formed between the two ends of the limiting block and the upper and lower sides of the cylindrical retainer.

[0015] The beneficial effects of the present invention are as follows: This invention features a cavity structure and a corresponding oil reservoir near the second pocket beam. Compared to the existing double-sided gap cage, this indirectly reduces the weight of the cylindrical cage, contributing to cage lightweighting. Simultaneously, the cage design, with only one side contacting the cylindrical roller, reduces the friction area, resulting in lower starting torque and operating energy consumption. The grease is filled in the oil reservoir on the non-contact side. During rotation, the grease transfer path is clear, continuously replenishing the core friction area of ​​the cylindrical roller. Furthermore, the oil reservoir is connected to the cavity structure, allowing grease to fill within the cavity, significantly increasing the grease's volume and preventing dry friction within the bearing, thus eliminating the need for frequent shutdowns for grease replenishment.

[0016] Because the grooves are vertically oriented, the grease tends to flow downwards under the influence of gravity during operation. Since the grooves are connected to the cavity structure, the grease eventually moves downwards within the grooves and reaches the roller surface through the cavity structure. As the cylindrical rollers rotate, there is also grease between the cylindrical rollers and the contact surface, which can lubricate the contact area in real time. Attached Figure Description

[0017] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0018] Figure 1 This is a schematic diagram of the cylindrical cage structure of the low-speed, high-load energy-saving structure in an embodiment of the present invention; Figure 2 This is a partial structural schematic diagram of the cylindrical cage of the low-speed, high-load energy-saving structure in an embodiment of the present invention; Figure 3 This is a partial structural schematic diagram of the cylindrical cage of the low-speed, high-load energy-saving structure in an embodiment of the present invention.

[0019] The diagram exaggerates the spacing or dimensions between parts to show their positions; the diagram is for illustrative purposes only.

[0020] Among them: 1. cylindrical cage, 2. cylindrical roller, 3. pocket, 4. contact surface, 5. weight reduction groove, 6. oil reservoir, 7. limiting protrusion, 41. limiting block, 8. first pocket beam, 9. second pocket beam, 10. cavity structure. Detailed Implementation

[0021] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the invention. Unless otherwise specified, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0022] Example 1 In a typical embodiment of the present invention, a cylindrical retainer with a low-speed, high-load energy-saving structure is provided. The cylindrical retainer 1 has multiple pockets 3 and corresponding pocket beams. A cylindrical roller 2 is installed at each pocket 3, and each pocket is formed between a first pocket beam 8 and a second pocket beam 9. Figure 1 and Figure 3 As shown, in each pocket, the pocket beam on one side of the cylindrical roller is the first pocket beam 8, and the one on the other side is the second pocket beam 9. In this embodiment, the one closer to the cylindrical roller is the first pocket beam 8.

[0023] At each pocket, on the opposite sides of the first pocket beam 8 and the second pocket beam 9, the side of the first pocket beam is the contact surface 4, and the side of the second pocket beam is the non-contact surface. The upper and lower sides of the pocket near the non-contact surface are provided with limiting protrusions 7. The limiting protrusions 7 and the contact surface form an installation space for the cylindrical roller, and the limiting protrusions 7 and the side of the second pocket beam 9 are at a set distance. A cavity structure is formed between the side of the limiting protrusions 7 near the first pocket beam and the side of the second pocket beam 9.

[0024] like Figures 1-3 As shown, the upper opening diameter and the lower opening diameter of the cylindrical cage 1 are matched. An oil storage cavity 6 is provided on the inner side of the cage near the cavity structure. The oil storage cavity 6 can store grease for lubrication.

[0025] Considering the high starting torque of bearing cages in industrial ceiling fans, this starting torque can be reduced by making the cages lighter, such as... Figure 1 As shown, a weight-reducing groove 5 is provided on the outer side of the cylindrical retainer, corresponding to the position between two adjacent pockets. The weight-reducing groove 5 is vertically arranged, and its upper and lower ends extend to the upper and lower end faces of the cylindrical retainer, respectively, that is, the length of the weight-reducing groove 5 is adapted to the height of the cylindrical retainer.

[0026] By incorporating weight-reducing grooves, the weight of the cylindrical cage is reduced, achieving cage lightweighting and resulting in a lower starting torque when the industrial ceiling fan is started.

[0027] like Figure 1 and Figure 2 As shown, the inner side of the cylindrical retainer is provided with a vertically extending groove, which forms an oil storage cavity 6. The upper end of the groove extends to the upper end face of the cylindrical retainer, and the lower end of the groove is located near the lower side of the pocket, and the lower end of the groove is higher than the lower side of the pocket. The lower end of the groove is connected to the cavity structure 10.

[0028] In this embodiment, a cavity structure is formed between the limiting protrusion 7 near the side of the first pocket beam and the side of the second pocket beam. The limiting protrusion 7 is provided at the cavity structure 10 to limit the cylindrical roller. The distance between the contact surfaces of the limiting protrusion and the first pocket beam is adapted to the diameter of the cylindrical roller 2, so that the cylindrical roller is accurately installed between the limiting protrusion 7 and the first pocket beam 8. The side of the second pocket beam 9 is a non-contact surface and never contacts the cylindrical roller. After the cylindrical roller 2 is installed on the cylindrical cage 1, the cavity structure 10 is formed between the cylindrical roller 2 and the side of the second pocket beam 9.

[0029] A groove is provided on the inner side of the first pocket beam 8 to form an oil storage cavity 6, and the oil storage groove is connected to the cavity structure. When the cylindrical cage of this embodiment is used on an industrial ceiling fan, since the industrial ceiling fan rotates in one direction, compared with the double-sided gap type cage of the prior art, this embodiment reduces the friction between the cylindrical roller 2 and the pocket beam near the limiting protrusion by setting a limiting protrusion. Only slight friction may occur between the limiting protrusion and the cylindrical roller 2. Compared with the prior art, the friction area of ​​each cylindrical roller 2 is reduced, the operating energy consumption at low speed is reduced, and the starting torque of the ceiling fan is also reduced by reducing friction.

[0030] In this embodiment, during unidirectional rotation, the cylindrical roller is subjected to centrifugal force, resulting in a tight fit between the cylindrical roller and the contact surface of the first pocket beam, with minimal friction between the cylindrical roller and the limiting protrusion. Compared to the existing double-sided gap-type cage, the cylindrical cage in this embodiment is a single-sided limiting cage, with the other side simply limited by a limiting protrusion to prevent the cylindrical roller from detaching.

[0031] like Figure 3 As shown, a limiting block 41 is provided on the contact surface of the first pocket beam. The limiting block 41 is arc-shaped and close to the outer side of the cylindrical cage. The limiting block 41 is used to contact the cylindrical roller. By setting the limiting block, the movement tendency of the cylindrical roller due to centrifugal force can be better restricted, so that the cylindrical roller can rotate stably in the pocket.

[0032] The two ends of the limiting block 41 form a gap with the upper and lower sides of the cylindrical cage 1, that is, the limiting block is disconnected from the upper and lower sides of the cylindrical cage. This setting is equivalent to reducing the contact area between the cylindrical roller and the contact surface, further saving operating energy consumption.

[0033] This embodiment considers the cage's application in a unidirectional rotation scenario, such as an industrial ceiling fan, where the second pocket beam has little impact on the cylindrical rollers. Therefore, a cavity structure and a corresponding oil reservoir are provided near the second pocket beam 9. The advantages are as follows: If a conventional double-sided gap cage were used, the size of the pocket would need to be reduced, indirectly increasing the weight of the cylindrical cage 1, which is detrimental to cage lightweighting and would also increase the starting torque. This embodiment, by setting a single-sided contact structure on the pocket beam and a cavity structure 10 on the other side, can further achieve cage lightweighting. Furthermore, during operation, the oil reservoir at the cavity structure 10 serves as a grease reservoir and delivery point, with the oil supply power derived from the adhesive effect of the cylindrical roller's rotation and the centrifugal force pushing it forward during its revolution. Meanwhile, due to the vertical arrangement of the grooves, the grease tends to flow downwards under the influence of gravity during operation. Since the grooves are connected to the cavity structure, the grease eventually moves downwards within the grooves and reaches the roller surface through the cavity structure. As the cylindrical rollers rotate, there is also grease between the cylindrical rollers and the contact surface, which can lubricate the contact area in real time.

[0034] Considering that industrial ceiling fans are installed in high locations such as factories and workshops, making maintenance inconvenient, the oil reservoir in this embodiment is designed as a groove inside a cylindrical cage. The grease can be filled into the cavity structure, allowing it to contact the cylindrical rollers. This method significantly increases the grease distribution volume, preventing dry friction within the bearing. Furthermore, the groove extends to the upper surface of the cage, facilitating the addition of grease without disassembling the bearing, making operation convenient.

[0035] In this embodiment, the grease is filled in the oil reservoir on the non-contact side. During rotation, the grease transfer path is clear, and grease can be continuously supplied to the core friction area of ​​the cylindrical roller. When the machine is stopped, the grease in the oil reservoir flows downward along the groove due to gravity, and some grease adheres to the roller surface. Before starting, a thin grease film has been formed between the roller and the right contact surface, avoiding dry start friction.

[0036] During operation, centrifugal force propels grease to the cylindrical rollers. Specifically, after the ceiling fan starts, the rollers rotate clockwise around the inner ring and rotate on their own axis. As the rollers rotate, they pick up and adhere to the grease. The left side of the roller remains in continuous contact with the grease, utilizing its viscosity (adsorption by the thickener) to adhere to the roller surface. The centrifugal force generated by the rollers' revolution is always directed to the right (towards the right contact surface). Under this centrifugal force, the grease adhering to the roller surface is "pressed" towards the right side of the roller and carried into the right contact friction zone with the roller's rotation. Furthermore, the grease entering the friction zone forms a continuous oil film between the roller and the cage contact surface. Simultaneously, the grease in the oil reservoir is continuously adhered to by the roller's rotation and propelled by centrifugal force, forming a cycle of "oil intake → oil delivery → oil replenishment," ensuring a constant supply of grease to the friction zone.

[0037] After the ceiling fan stops, the rollers stop moving, the centrifugal force disappears, and the remaining grease flows back to the bottom of the oil reservoir due to gravity along the groove on the left side. It is then refilled at the oil extraction point of the cylindrical rollers, forming a closed loop of "oil supply → return → replenishment" to store grease for the next startup.

[0038] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A cylindrical cage with a low-speed, high-load, energy-saving structure, wherein the cylindrical cage has multiple pockets and corresponding pocket beams, each pocket is formed between a first pocket beam and a second pocket beam, and a cylindrical roller is installed at each pocket, characterized in that, In the opposing sides of the first pocket beam and the second pocket beam, the side of the first pocket beam is the contact surface and the side of the second pocket beam is the non-contact surface. The upper and lower sides of the pocket near the non-contact surface are provided with corresponding limiting protrusions. The limiting protrusions and the contact surface form an installation space for the cylindrical roller. The limiting protrusions are at a set distance from the side of the second pocket beam. A cavity structure is formed between the side of the limiting protrusion near the first pocket beam and the side of the second pocket beam. An oil storage cavity is provided on the inner side of the cage near the cavity structure.

2. The cylindrical cage with a low-speed, high-load energy-saving structure according to claim 1, characterized in that, The upper and lower opening diameters of the cylindrical cage are matched.

3. The cylindrical cage with a low-speed, high-load energy-saving structure according to claim 1, characterized in that, A weight-reducing groove is provided on the outer side of the cylindrical cage at the position between two adjacent pockets.

4. The cylindrical cage with a low-speed, high-load energy-saving structure according to claim 3, characterized in that, The weight-reducing groove extends to the upper and lower ends of the cylindrical retainer, respectively.

5. The cylindrical cage with a low-speed, high-load energy-saving structure according to claim 1, characterized in that, The inner side of the cylindrical retainer is provided with a vertically extending groove, and an oil storage cavity is formed in the groove.

6. The cylindrical cage with a low-speed, high-load energy-saving structure according to claim 5, characterized in that, The upper end of the groove extends to the upper surface of the cylindrical retainer, and the lower end of the groove is located near the lower side of the pocket.

7. The cylindrical cage with a low-speed, high-load energy-saving structure according to claim 6, characterized in that, The lower end of the groove is positioned higher than the lower side of the pocket, and the lower end of the groove is connected to the cavity structure.

8. The cylindrical cage with a low-speed, high-load energy-saving structure according to claim 1, characterized in that, The distance between the limiting protrusion and the contact surface is adapted to the diameter of the cylindrical roller.

9. The cylindrical cage with a low-speed, high-load energy-saving structure according to claim 1, characterized in that, The contact surface is provided with a limiting block, which is arc-shaped and used to contact the cylindrical roller.

10. A cylindrical cage with a low-speed, high-load energy-saving structure according to claim 9, characterized in that, The two ends of the limiting block form gaps with the upper and lower sides of the cylindrical retainer.

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