A self-lubricating injection-molded bearing cage

Abstract

The present invention provides a self-lubricating injection-molded bearing cage, which relates to the technical field of bearing accessories. It includes a cage, a self-lubricating shock-absorbing fixing structure and a positioning ring. The self-lubricating shock-absorbing fixing structure is arranged at the top and bottom of the cage. The positioning ring fits on the inner circumferential wall of the cage and is limited by the self-lubricating shock-absorbing fixing structures at the upper and lower ends of the cage. Cross-shaped connection holes are provided at the top of the cage, and a number of docking grooves are also provided around the center line at the top of the cage. The main body part of the cage is divided into a number of accommodating areas. The self-lubricating shock-absorbing fixing structure includes an outer layer and an inner layer. The outer layer is arranged outside the inner layer, and the inner layer is arranged outside the cage. Through design improvements, the overall structure of the bearing cage is improved, and the injection-molded bearing cage is provided with a self-lubricating function and an effective shock-absorbing effect, enhancing the overall stability and practicality of the injection-molded bearing cage.

Description

Technical Field

[0001] The present invention relates to the technical field of bearing accessories, and particularly to a self-lubricating injection-molded bearing cage. Background Art

[0002] A bearing is a component that plays a role in fixing, rotating, and reducing the load friction coefficient during mechanical transmission. It can also be said that when other machine parts move relative to each other on a shaft, it is a machine part used to reduce the friction coefficient during the transmission of the moving force and keep the center position of the rotating shaft fixed; a bearing is a very important component in contemporary mechanical equipment. Its main function is to support the mechanical rotating body, so as to reduce the mechanical load friction coefficient during the transmission of the equipment. Its accuracy, performance, life, and reliability play a decisive role in the accuracy, performance, life, and reliability of the main machine. According to the different friction properties of the moving elements, bearings can be divided into two categories: rolling bearings and sliding bearings. A cage (i.e., a bearing cage, also known as a bearing retainer) refers to a bearing part that partially wraps all or part of the rolling elements and moves with them, used to isolate the rolling elements, and usually also guides the rolling elements and holds them in the bearing;

[0003] Most traditional cages have a simple structure. Generally, an integrally formed metal cage or plastic cage is used to accommodate bearing steel balls. However, generally, after installation, the lubrication between the bearing cage and multiple components of the steel balls still uses the basic method of manual addition of lubricating oil (the lubricating oil plays roles such as lubrication, cooling, pressure resistance, and extending the bearing life). This results in the need for frequent addition of lubricating oil to the bearing cage and steel balls, and the effect of self-lubrication cannot be achieved. When used on many equipment that need to operate for a long time, it will affect the use. Similarly, due to the simple structure, the bearing cage cannot provide an effective and stable shock absorption or vibration mitigation effect, and its function is limited. For this reason, we propose a self-lubricating injection-molded bearing cage. Summary of the Invention

[0004] The purpose of the present invention is to solve the deficiencies existing in the prior art. After installation, the lubrication between the bearing cage and multiple components of the steel balls still uses the basic method of manual addition of lubricating oil. This results in the need for frequent addition of lubricating oil to the bearing cage and steel balls, and the effect of self-lubrication cannot be achieved. When used on many equipment that need to operate for a long time, it will affect the use. Similarly, due to the simple structure, the bearing cage cannot provide an effective and stable shock absorption or vibration mitigation effect, and its function is limited.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A self-lubricating injection-molded bearing cage, comprising a cage, a self-lubricating shock-absorbing fixing structure and a positioning ring. The self-lubricating shock-absorbing fixing structure is arranged at the top and bottom of the cage, and the positioning ring fits on the inner circumferential wall of the cage and is limited by the self-lubricating shock-absorbing fixing structures at the upper and lower ends of the cage.

[0007] The top of the cage is provided with connecting holes in a cross-shaped manner, and several docking grooves are further provided around the center line at the top of the cage. The main body part of the cage is divided into several accommodating areas, and annular communication grooves are provided at the top and bottom of the accommodating areas inside the cage.

[0008] The self-lubricating shock-absorbing fixing structure includes an outer layer and an inner layer. The outer layer is arranged outside the inner layer, and the inner layer is arranged outside the cage.

[0009] Installation holes corresponding to the connecting holes are provided on the inner side of the inner layer where the outer layer extends outward, and an oil injection nozzle is provided inside the inner layer where the outer layer extends outward.

[0010] A first cavity is formed inside the outer layer, and shock pads are symmetrically arranged inside the first cavity.

[0011] A second cavity is formed inside the inner layer, and several micro springs in contact with the top and bottom surfaces of the cavity are arranged inside the second cavity. Docking protrusions corresponding to the docking grooves are provided on the side of the inner layer away from the outer layer.

[0012] As a preferred solution of the present invention, the connecting holes and the installation holes are adapted to each other and fixed by fixing parts, and an embedded hole is provided in the installation hole.

[0013] The technical effect of adopting the above further solution is that: being adapted to each other and fixed by fixing parts through the connecting holes and the installation holes facilitates disassembly, combination and installation, and while playing a dust-proof effect on the bearing cage, it makes maintenance and repair more convenient, and the embedded hole internalizes the fixing parts.

[0014] As a preferred solution of the present invention, oil nozzle communication ports connected to the oil injection nozzles are provided on both sides of the cage, and the oil nozzle communication ports are connected to the annular communication grooves.

[0015] The technical effect of adopting the above further solution is that: the lubricating oil is circulated through the connection between the oil nozzle communication port and the annular communication groove, and the lubricating oil in the second cavity enters through the oil nozzle communication port.

[0016] As a preferred solution of the present invention, steel column accommodating grooves are formed inside the accommodating areas, bearing contact holes are formed on the inner and outer circumferential walls of the cage from the inside of the steel column accommodating grooves, and communication holes are formed between the steel column accommodating grooves and the annular communication grooves.

[0017] As a preferred solution of the present invention, the steel column placement groove is used to internally place bearing steel balls, the bearing contact holes enable the bearing steel balls to contact the inner and outer rings of the bearing, and the communication holes are connected to the annular communication groove and the steel column placement groove.

[0018] The technical effect of adopting the above further solution is that: the bearing steel balls are internally placed through the steel column placement groove, and the internally placed bearing steel columns contact the bearing through the bearing contact holes to play a transmission role. The communication holes are connected to the annular communication groove and the steel column placement groove to circulate the lubricating oil, achieving a self-lubricating effect, continuously injecting the lubricating oil into the steel column placement groove, and making the transmission of the bearing steel balls to the inner and outer bearings and their own operation smoother.

[0019] As a preferred solution of the present invention, the outer layer and the inner layer have the same size and are fitted to the outer circumferential wall of the cage, and the positioning ring, the outer layer and the inner layer are all made of copper alloy material.

[0020] The technical effect of adopting the above further solution is that: since the positioning ring, the outer layer and the inner layer are made of copper alloy, which has the characteristics of good thermal conductivity, small friction coefficient, good formability and high service temperature, heat conduction is carried out to improve the heat dissipation effect.

[0021] As a preferred solution of the present invention, the two shock pads are in contact with each other, and the shock pads are made of rubber material.

[0022] The technical effect of adopting the above further solution is that: through the contact of the shock pads in the first cavity, when the bearing cage is put into use, the vibration on the bearing is alleviated and absorbed through the resonance of the shock pads in the outer layer, improving the shock absorption effect of the cage.

[0023] As a preferred solution of the present invention, the docking groove is adapted to the docking protrusion.

[0024] The technical effect of adopting the above further solution is that: by the adaptation of the docking groove to the docking protrusion, the stability of the fixed installation of the connection hole and the installation hole is improved.

[0025] As a preferred solution of the present invention, steel ball limiting holes are provided on the inner and outer circumferential walls of the positioning ring corresponding to the center point of the bearing contact holes, and the diameter of the steel ball limiting holes is less than 1 / 5 of the bearing contact holes.

[0026] The technical effect of adopting the above further solution is that: the steel ball limiting holes do not affect the contact of the bearing contact holes and the bearing steel balls with the inner bearing, and limit the steel balls.

[0027] As a preferred solution of the present invention, the second cavity is used to accommodate the lubricating liquid, and the oil injection nozzle is also connected to the second cavity.

[0028] The technical effects of adopting the above further solution are as follows: The second cavity is used to accommodate the lubricating fluid. After the lubricating oil is externally injected through the oil injection nozzle, the lubricating oil first flows into the second cavity to accommodate the lubricating oil, so as to provide lubricating oil to achieve a self-lubricating effect when the bearing operates.

[0029] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0030] In the present invention, through the design of the cage and the inner layer, the second cavity is used to accommodate the lubricating fluid after the injection of the oil injection nozzle, so as to provide lubricating oil to achieve a self-lubricating effect when the bearing operates. The bearing steel balls are internally placed through the steel ball placement grooves, and the internally placed bearing steel columns are in contact with the bearing through the bearing contact holes to play a transmission role. During this process, the communication holes are connected to the annular communication grooves and the steel ball placement grooves to circulate the lubricating oil, achieving a self-lubricating effect, continuously injecting the lubricating oil into the steel ball placement grooves, making the transmission of the bearing steel balls between the inner and outer bearings and their own rotation smoother, avoiding the need for frequent addition of lubricating oil to the bearing cage and the steel balls, achieving a self-lubricating effect, and ensuring the long-term operation of equipment and facilities that need to operate for a long time.

[0031] Secondly, through the design of the outer layer, the inner layer and the positioning ring, since the positioning ring, the outer layer and the inner layer are made of copper alloy, which has the characteristics of good thermal conductivity, small friction coefficient, good formability and high use temperature, heat conduction is carried out to improve the heat dissipation effect. Among them, the shock-absorbing pad is in contact inside the first cavity. When the bearing cage is put into use, the vibration on the bearing is alleviated and absorbed through the resonance of the shock-absorbing pad inside the outer layer. The micro-springs in the second cavity also play an effect of absorbing vibration, and through the wrapping of the lubricating fluid around the springs, the liquid absorbs the vibration, thereby improving the shock-absorbing effect of the cage at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the overall structure of a self-lubricating injection-molded bearing cage provided by the present invention;

[0033] Figure 2 It is a schematic diagram of the overall split structure of a self-lubricating injection-molded bearing cage provided by the present invention;

[0034] Figure 3 It is a schematic diagram of the self-lubricating and shock-absorbing and fixing structure on one side of a self-lubricating injection-molded bearing cage provided by the present invention;

[0035] Figure 4 It is a schematic diagram of the positioning ring structure of a self-lubricating injection-molded bearing cage provided by the present invention;

[0036] Figure 5 It is a schematic diagram of the cage structure of a self-lubricating injection-molded bearing cage provided by the present invention;

[0037] Figure 6 Schematic diagram of the self-lubricating and shock-absorbing fixing structure on the other side of a self-lubricating injection-molded bearing cage provided by the present invention;

[0038] Figure 7 Anatomical diagram of the self-lubricating and shock-absorbing fixing structure of a self-lubricating injection-molded bearing cage provided by the present invention;

[0039] Figure 8 Enlarged schematic diagram of Structure A of a self-lubricating injection-molded bearing cage provided by the present invention;

[0040] Figure 9 Anatomical diagram of the cage structure of a self-lubricating injection-molded bearing cage provided by the present invention;

[0041] Figure 10 Enlarged schematic diagram of Structure B of a self-lubricating injection-molded bearing cage provided by the present invention.

[0042] Legend: 1. Cage; 101. Oil nozzle communication port; 11. Connecting hole; 12. Docking groove; 13. Placement area; 131. Steel column placement groove; 132. Bearing contact hole; 133. Communication hole; 14. Ring-shaped communication groove; 2. Self-lubricating and shock-absorbing fixing structure; 21. Outer layer; 211. First cavity; 212. Shock pad; 22. Inner layer; 221. Second cavity; 222. Micro spring; 223. Docking protrusion; 23. Mounting hole; 24. Oil injection nozzle; 3. Positioning ring; 301. Steel ball limiting hole. Detailed implementation manners

[0043] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0044] For the convenience of understanding the present invention, the present invention will be described more comprehensively below with reference to the relevant. Several embodiments of the present invention are given. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0045] It should be noted that when an element is referred to as "fixed to" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this article are only for the purpose of illustration.

[0046] Unless otherwise defined, all technical and scientific terms used in this article have the same meaning as commonly understood by those skilled in the technical field to which this invention belongs. The terms used in the description of the present invention in this article are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used in this article includes any and all combinations of one or more of the related listed items.

[0047] Embodiment 1

[0048] As Figures 1-10 shown, the present invention provides a technical solution: a self-lubricating injection-molded bearing cage, including a cage 1, a self-lubricating shock-absorbing and fixing structure 2, and a positioning ring 3. The self-lubricating shock-absorbing and fixing structure 2 is provided at the top and bottom of the cage 1. The positioning ring 3 is attached to the inner circumferential wall of the cage 1 and is limited by the self-lubricating shock-absorbing and fixing structure 2 at the upper and lower ends of the cage 1. The top of the cage 1 is cross-shaped with connection holes 11. The top of the cage 1 is also provided with a number of docking grooves 12 around the center line. The main body part of the cage 1 is divided into a number of accommodating areas 13. Ring-shaped communication grooves 14 are provided at the top and bottom of the inside of the cage 1 and located in the accommodating areas 13. The self-lubricating shock-absorbing and fixing structure 2 includes an outer layer 21 and an inner layer 22. The outer layer 21 is provided outside the inner layer 22. The inner layer 22 is provided outside the cage 1. Installation holes 23 corresponding to the connection holes 11 are provided on the outside of the outer layer 21 extending to the inside of the inner layer 22. An oil injection nozzle 24 is provided on the outside of the outer layer 21 extending to the inside of the inner layer 22. A first cavity 211 is opened inside the outer layer 21. Shock pads 212 are symmetrically provided inside the first cavity 211. A second cavity 221 is opened inside the inner layer 22. A number of micro springs 222 in contact with the top and bottom of the cavity are provided inside the second cavity 221. Docking protrusions 223 corresponding to the docking grooves 12 are provided on the side of the inner layer 22 away from the outer layer 21.

[0049] Embodiment 2

[0050] As Figures 1-10As shown, the connecting hole 11 and the mounting hole 23 are adapted to each other and fixed by a fixing member. An embedded hole is provided in the mounting hole 23. The adaptation and fixation of the connecting hole 11 and the mounting hole 23 by the fixing member facilitate disassembly, combination and installation, and while providing a dust-proof effect for the bearing cage 1, it also makes maintenance and servicing more convenient. The embedded hole is used to house the fixing member. Oil nozzle communication ports 101 are connected and docked with the two sides of the cage 1 and the oil nozzles 24. The oil nozzle communication ports 101 are connected to the annular communication groove 14. Steel column accommodating grooves 131 are provided inside the accommodating area 13. Bearing contact holes 132 are provided on the inner and outer circumferential walls of the steel column accommodating grooves 131 extending towards the cage 1. Communication holes 133 are provided between the steel column accommodating grooves 131 and the annular communication groove 14. The steel column accommodating grooves 131 are used to house bearing steel balls. The bearing contact holes 132 enable the bearing steel balls to contact the inner and outer rings of the bearing. The communication holes 133 are connected to the annular communication groove 14 and the steel column accommodating grooves 131. The outer layer 21 and the inner layer 22 have the same size and are in contact with the outer circumferential wall of the cage 1. The positioning ring 3, the outer layer 21 and the inner layer 22 are all made of copper alloy. Due to the good thermal conductivity, small friction coefficient, good formability and high service temperature of the copper alloy of the positioning ring 3, the outer layer 21 and the inner layer 22, heat conduction is carried out to improve the heat dissipation effect. The two shock pads 212 are in contact with each other. The shock pads 212 are made of rubber material. The docking groove 12 is adapted to the docking protrusion 223. The adaptation of the docking groove 12 and the docking protrusion 223 improves the stability of the fixed installation of the connecting hole 11 and the mounting hole 23. Steel ball limiting holes 301 are provided on the inner and outer circumferential walls of the positioning ring 3 corresponding to the center points of the bearing contact holes 132. The steel ball limiting holes 301 do not affect the contact of the bearing contact holes 132 and the bearing steel balls with the inner bearing, and limit the steel balls. The diameter of the steel ball limiting holes 301 is less than 1 / 5 of the diameter of the bearing contact holes 132. The second cavity 221 is used to accommodate lubricating fluid. The oil nozzle 24 is also connected to the second cavity 221.

[0051] Working process of the present invention: When a self-lubricating injection-molded bearing cage is put into a bearing assembly for operation, first, the staff injects lubricating fluid into the second cavity 221 through the oil injection nozzle 24, so as to provide the supply of lubricating oil during the operation of the bearing. Among them, the steel column placement grooves 131 are internally provided with beads, and the internally placed bearing steel columns are in contact through the bearing contact holes 132 to play a transmission role. The oil nozzle communication port 101 is connected to the annular communication groove 14 for the lubricating oil to circulate, so that the lubricating oil in the second cavity 221 passes through the oil nozzle communication port 101, the communication hole 133, the communication groove and the steel column placement groove 131 to circulate the lubricating oil, achieving the effect of self-lubrication, continuously injecting the lubricating oil into the steel column placement groove 131, making the transmission between the bearing steel balls of the inner and outer bearings and its own operation smoother. The outer layer 21 of the positioning ring 3 is made of copper alloy, which has the characteristics of good thermal conductivity, small friction coefficient, good formability and high service temperature, and conducts heat to improve the heat dissipation effect. Among them, the shock pad 212 is in contact in the first cavity 211. When the bearing cage 1 is put into use, the vibration on the bearing is alleviated and absorbed through the resonance of the shock pad by the outer layer 21. The micro-springs 222 in the second cavity 221 play the role of absorbing vibration, and through the wrapping of the lubricating fluid around the springs, the liquid absorbs the vibration to improve the shock absorption effect of the cage 1. Moreover, the positioning ring 3 affects the contact between the bearing contact hole 132, the bearing steel ball and the inner bearing, and limits and supports the steel ball. After the outer layer 21 is disassembled, the inside can be cleaned. Compared with the existing self-lubricating injection-molded bearing cage, the present invention improves the overall structure of the bearing cage through design, and brings self-lubricating function and effective shock absorption effect to the injection-molded bearing cage, improving the overall stability and practicality of the injection-molded bearing cage.

[0052] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made in these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A self-lubricating injection-molded bearing cage, comprising a cage (1), a self-lubricating shock-absorbing fixing structure (2) and a positioning ring (3), characterized in that: The self-lubricating shock-absorbing fixing structure (2) is arranged at the top and bottom of the cage (1), and the positioning ring (3) is attached to the inner circumferential wall of the cage (1) and is limited by the self-lubricating shock-absorbing fixing structure (2) at the upper and lower ends of the cage (1). At the top of the cage (1), connecting holes (11) are provided in a cross shape, and a number of docking grooves (12) are also provided around the center line at the top of the cage (1). The main body part of the cage (1) is divided into a number of accommodating areas (13). At the top and bottom of the accommodating areas (13) inside the cage (1), annular communication grooves (14) are provided. The self-lubricating shock-absorbing fixing structure (2) includes an outer layer (21) and an inner layer (22). The outer layer (21) is arranged outside the inner layer (22), and the inner layer (22) is arranged outside the cage (1). An installation hole (23) corresponding to the connecting hole (11) is provided on the outer side of the outer layer (21) extending to the inner side of the inner layer (22), and an oil injection nozzle (24) is provided on the outer side of the outer layer (21) extending to the inside of the inner layer (22). A first cavity (211) is opened inside the outer layer (21), and shock pads (212) are symmetrically arranged inside the first cavity (211). A second cavity (221) is opened inside the inner layer (22), and a number of micro springs (222) in contact with the top and bottom surfaces of the cavity are arranged inside the second cavity (221). A docking protrusion (223) corresponding to the docking groove (12) is provided on the side of the inner layer (22) away from the outer layer (21).

2. The self-lubricating injection-molded bearing cage according to claim 1, wherein: The connecting hole (11) and the installation hole (23) are adapted to each other and are fixed by fixing parts. An embedded hole is provided inside the installation hole (23).

3. The self-lubricating injection-molded bearing cage according to claim 1, wherein: Oil nozzle communication ports (101) are connected and docked with the oil injection nozzle (24) on both sides of the cage (1), and the oil nozzle communication ports (101) are connected to the annular communication grooves (14).

4. A self-lubricating injection-molded bearing cage according to claim 1, wherein: Steel column accommodating grooves (131) are opened inside the accommodating areas (13). Bearing contact holes (132) are opened on the inner and outer circumferential walls of the cage (1) from the inside of the steel column accommodating grooves (131). Communication holes (133) are opened between the steel column accommodating grooves (131) and the annular communication grooves (14).

5. The self-lubricating injection-molded bearing cage according to claim 4, wherein: The steel column accommodating grooves (131) are used to accommodate bearing steel balls. The bearing contact holes (132) enable the bearing steel balls to contact the inner and outer rings of the bearing. The communication holes (133) are connected to the annular communication grooves (14) and the steel column accommodating grooves (131).

6. A self-lubricating injection-molded bearing cage according to claim 1, characterized in that: The outer layer (21) and the inner layer (22) are of the same size and are attached to the outer circumferential wall of the cage (1). The positioning ring (3), the outer layer (21) and the inner layer (22) are all made of copper alloy material.

7. A self-lubricating injection-molded bearing cage according to claim 1, characterized in that: The two shock pads (212) are in contact with each other, and the shock pads (212) are made of rubber material.

8. A self-lubricating injection-molded bearing cage according to claim 1, characterized in that: The docking groove (12) is adapted to the docking protrusion (223).

9. The self-lubricating injection-molded bearing cage according to claim 1, characterized in that: The inner and outer circumferential walls of the positioning ring (3) are provided with ball limiting holes (301) corresponding to the center point of the bearing contact hole (132), and the diameter of the ball limiting holes (301) is less than 1 / 5 of the bearing contact hole (132).

10. A self-lubricating injection-molded bearing cage according to claim 1, characterized in that: The second cavity (221) is used to accommodate lubricating fluid, and the oil injection nozzle (24) is also communicated with the second cavity (221).

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