A cage and its application to a bearing

Abstract

This application discloses a bearing cage and its application, relating to the field of bearing technology. The cage includes a main ring body, a secondary ring body, and multiple connecting bodies. The connecting bodies are fixedly mounted on the main ring body, and the secondary ring bodies are located at the ends of the connecting bodies. A pocket is formed between adjacent connecting bodies. Elastic buffers are provided on both side walls of the connecting bodies, and a first oil reservoir is formed within each elastic buffer, storing lubricating oil. Multiple capillary micropores are spaced apart on the side walls of the elastic buffers, with the ends of the micropores connecting to the first oil reservoir. When the bearing's rotational speed and load exhibit unsteady changes, the rolling elements impact the elastic buffers on the side walls of the connecting bodies. Upon impact, the elastic buffers undergo compressive deformation, buffering the impact on the rolling elements. The lubricating oil in the first oil reservoir is squeezed out from the capillary micropores and lubricates the rolling elements, thereby reducing the accelerated wear on the cage under harsh conditions such as variable speed and load.

Description

Technical Field

[0001] This application relates to the field of bearing technology, and in particular to a bearing with a cage and its application. Background Technology

[0002] The basic components of a bearing include an inner ring, an outer ring, rolling elements, and a cage. The main function of the cage is to isolate the rolling elements, preventing them from colliding and rubbing against each other, while guiding the rolling elements to be evenly distributed on the raceway and maintaining the correct trajectory, thereby ensuring the reasonable distribution of load among the rolling elements. Currently, common cages adopt a two-piece structure, with the two cage bodies rigidly connected by bolts or rivets, and the cage and rolling elements forming a direct contact hard fit.

[0003] In actual use, the bearing's rotational speed and load often exhibit non-steady-state variations. When the bearing speed changes, the centrifugal force on the rolling elements changes dynamically, causing continuous fluctuations in the contact state between the rolling elements and the cage, thus significantly exacerbating friction and wear. When the bearing load changes, the contact balance between the cage and the rolling elements is disrupted, inducing additional impact and fretting wear. These wear behaviors will widen the cage pocket clearance, reduce guiding accuracy, and subsequently lead to increased bearing vibration, increased noise, and other performance degradation phenomena. In severe cases, it may even cause the cage to break and fail. Summary of the Invention

[0004] In order to reduce the accelerated wear of the cage under harsh working conditions such as variable speed and variable load, this application provides a cage and a bearing in which the cage is used.

[0005] Firstly, the cage provided in this application adopts the following technical solution: A retainer includes a main ring body, a secondary ring body, and multiple connecting bodies. The multiple connecting bodies are fixedly disposed at equal intervals along the circumference of the main ring body on the outer side wall of the main ring body. The secondary ring body is detachably fixedly disposed at the end of the multiple connecting bodies away from the main ring body. A pocket is formed between two adjacent connecting bodies. An elastic buffer is provided on each of the opposite side walls of the connecting bodies near the pocket. A first oil storage cavity is formed in the elastic buffer and the first oil storage cavity stores lubricating oil. Multiple capillary micropores are spaced apart on the side wall of the elastic buffer near the pocket, and the ends of the capillary micropores are connected to the first oil storage cavity.

[0006] By adopting the above technical solution, when the bearing speed and the load exhibit non-steady-state changes, the rolling element impacts the elastic buffer on the side wall of the connecting body. After being impacted, the elastic buffer undergoes compression deformation and buffers the impact of the rolling element. At the same time, when the elastic buffer is impacted by the rolling element, the lubricating oil in the first oil reservoir is squeezed out from the capillary micropores. The squeezed-out lubricating oil lubricates the rolling element, thereby reducing the accelerated wear of the cage under harsh working conditions such as variable speed and variable load.

[0007] Preferably, a slider is fixedly provided on the outer side wall of the elastic buffer member away from the capillary micropores, an installation groove is provided on the side wall of the connector near the pocket, and a dovetail groove is provided on the inner wall of the connector located in the installation groove. The ends of the installation groove and the dovetail groove away from the main ring body are both open. The elastic buffer member is slidably disposed in the installation groove along the diameter direction of the main ring body, and the slider is slidably disposed in the dovetail groove along the diameter direction of the main ring body.

[0008] By adopting the above technical solution, when installing the elastic buffer, the elastic buffer is inserted into the mounting groove of the connector, and the elastic buffer drives the slider to insert into the dovetail groove. The slider and the dovetail groove cooperate to limit the elastic buffer, so that the elastic buffer can be stably installed in the mounting groove. At the same time, the elastic buffer is installed by sliding, which facilitates the assembly and disassembly of the elastic buffer.

[0009] Preferably, the main ring body has an oil supply channel along its circumference, each connecting body has a second oil storage chamber, each second oil storage chamber is connected to the oil supply channel, one second oil storage chamber is connected to two first oil storage chambers, the side wall of the main ring body has an oil injection port connected to the oil supply channel, the main ring body is detachably provided with a plug inside the oil injection port, and the side wall of the main ring body is provided with a one-way vent connected to the oil supply channel, through which outside air enters the oil supply channel.

[0010] By adopting the above technical solution, the operator injects lubricating oil into the oil supply channel through the oil inlet. The lubricating oil enters the first oil storage chamber of the elastic buffer through the second oil storage chamber of the connector. When the elastic buffer is impacted and compressed by the rolling element, the lubricating oil in the first oil storage chamber is squeezed out from the capillary micropores. When the elastic buffer rebounds, a negative pressure is formed in the first oil storage chamber of the elastic buffer, so that the lubricating oil in the oil supply channel and the second oil storage chamber can be drawn into the first oil storage chamber, thereby continuously supplying lubricating oil to the capillary micropores. At the same time, during the rebound of the elastic buffer, outside air is drawn into the oil supply channel through the one-way vent to balance the pressure in the oil supply channel and prevent the formation of a vacuum due to the lubricating oil being sucked out, which would hinder the oil replenishment.

[0011] Preferably, the slider has a first connecting hole that communicates with the first oil storage chamber, the connecting body has a convex ring fixedly installed on the inner wall of the dovetail groove, the connecting body has a second connecting hole inside the convex ring that communicates with the second oil storage chamber, and the convex ring is inserted into the first connecting hole.

[0012] By adopting the above technical solution, when the slider is inserted into the dovetail groove, the convex ring in the dovetail groove is inserted into the first connecting hole of the slider. At this time, the first connecting hole is connected to the second connecting hole, thereby connecting the first oil storage chamber and the second oil storage chamber.

[0013] Preferably, the slider is provided with an elastic pull rope inside the first connecting hole, and a blocking ball is provided on the elastic pull rope. When the protruding ring is inserted into the first connecting hole, the blocking ball blocks the protruding ring.

[0014] By adopting the above technical solution, when the elastic buffer is compressed and deformed, the elastic rope drives the blocking ball to seal the convex ring, so that the lubricating oil in the first oil storage chamber will not flow back into the second oil storage chamber; when the elastic buffer rebounds, a negative pressure is formed in the first oil storage chamber, the blocking ball moves towards the first oil storage chamber and opens the convex ring, so that the lubricating oil in the second oil storage chamber can be drawn into the first oil storage chamber.

[0015] Preferably, the elastic buffer member has an oil collecting groove on the side wall near the pocket, an oil collecting cavity communicating with the oil collecting groove is formed inside the elastic buffer member, a first through hole communicating with the oil collecting cavity and the first oil storage cavity is formed inside the elastic buffer member, and a spring sheet is provided on the inner wall of the elastic buffer member located in the first oil storage cavity, the spring sheet blocking the first through hole.

[0016] By adopting the above technical solution, the lubricating oil squeezed out from the capillary micropores adheres to the side wall of the elastic buffer. During the rolling process, the rolling element drives the lubricating oil to move on the side wall of the elastic buffer. When the lubricating oil moves to the oil collection groove, it enters the oil collection chamber through the oil collection groove. When the elastic buffer is squeezed and deformed, the spring sheet blocks the first through hole. When the elastic buffer rebounds, a negative pressure is formed in the first oil storage chamber. The spring sheet moves and opens the first through hole, and the lubricating oil in the oil collection chamber is sucked into the first oil storage chamber, thereby enabling the lubricating oil to be recycled and reused.

[0017] Preferably, the elastic buffer is provided with a plurality of shape memory support rods spaced apart in the first oil storage cavity. The shape memory support rods are arranged along the direction parallel to the tangent of the main ring. When the temperature of the shape memory support rod is lower than the critical temperature T, the shape memory support rod is in a hard glass state. When the temperature of the shape memory support rod is higher than the critical temperature T, the shape memory support rod is in a soft rubber state. The critical temperature T is between 60-70°C.

[0018] By adopting the above technical solution, when the bearing is in a low-temperature state below the critical temperature T, the wear of the rolling elements is small. At this time, the shape memory support rod is in a hard glass state. Under the action of the hard shape memory support rod, the compressive deformation of the elastic buffer when it is impacted is small, resulting in a small amount of oil output from the capillary micropores. When the bearing is in a high-temperature state above the critical temperature T, the wear of the rolling elements will intensify. At this time, the shape memory support rod is in a soft rubber state and does not support the elastic buffer. The compressive deformation of the elastic buffer when it is impacted increases, resulting in an increase in the amount of oil output from the capillary micropores, thereby reducing the frictional loss of the rolling elements. When the bearing temperature drops again to a low-temperature state below the critical temperature T, the shape memory support rod returns to the hard glass state and resets to its initial state, thus facilitating the support of the elastic buffer again.

[0019] Preferably, the elastic buffer is provided with a plurality of heat-conducting sheets embedded on the side wall near the pocket.

[0020] By adopting the above technical solution, the heat dissipated by the rolling element is transferred to the shape memory support rod using a heat-conducting sheet, thereby facilitating the shape memory support rod to sense the precise temperature of the rolling element.

[0021] Preferably, the elastic buffer has a wear-resistant coating formed on the side wall near the pocket.

[0022] By adopting the above technical solution, the wear-resistant coating on the side wall of the elastic buffer comes into contact with the rolling element, reducing the frictional loss between the elastic buffer and the rolling element, thereby improving the service life of the elastic buffer.

[0023] Secondly, the bearing provided in this application adopts the following technical solution: A bearing employing the aforementioned cage further includes an outer ring, an inner ring, and a plurality of rolling elements, the cage being located between the outer ring and the inner ring, and the plurality of rolling elements being disposed within a plurality of pockets in the cage.

[0024] In summary, this application includes at least one of the following beneficial technical effects: 1. By utilizing an elastic buffer, when the bearing speed and the load exhibit unsteady changes, the rolling elements impact the elastic buffer on the side wall of the connecting body. After being impacted, the elastic buffer undergoes compression deformation and buffers the impact of the rolling elements. At the same time, when the elastic buffer is impacted by the rolling elements, the lubricating oil in the first oil reservoir is squeezed out from the capillary pores. The squeezed-out lubricating oil lubricates the rolling elements, thereby reducing the accelerated wear of the cage under harsh working conditions such as variable speed and variable load. 2. Using the oil supply channel, the operator injects lubricating oil into the oil supply channel through the oil inlet. The lubricating oil enters the first oil storage chamber of the elastic buffer through the second oil storage chamber of the connector. When the elastic buffer is impacted and compressed by the rolling element, the lubricating oil in the first oil storage chamber is squeezed out from the capillary micropores. When the elastic buffer rebounds, a negative pressure is formed in the first oil storage chamber of the elastic buffer, which allows the lubricating oil in the oil supply channel and the second oil storage chamber to be drawn into the first oil storage chamber, thereby continuously supplying lubricating oil to the capillary micropores. At the same time, during the rebound of the elastic buffer, outside air is drawn into the oil supply channel through the one-way vent to balance the pressure in the oil supply channel and prevent the formation of a vacuum due to the lubricating oil being sucked out, which would hinder the replenishment of oil. 3. Using shape memory support rods, when the bearing is at a low temperature below the critical temperature T, the wear of the rolling elements is small. At this time, the shape memory support rod is in a hard glass state. Under the action of the hard shape memory support rod, the compressive deformation of the elastic buffer under impact is small, resulting in a small amount of oil output from the capillary pores. When the bearing is at a high temperature above the critical temperature T, the wear of the rolling elements will intensify. At this time, the shape memory support rod is in a soft rubber state and does not support the elastic buffer. The compressive deformation of the elastic buffer under impact increases, resulting in a larger amount of oil output from the capillary pores, thereby reducing the frictional loss of the rolling elements. When the bearing temperature drops back to a low temperature below the critical temperature T, the shape memory support rod returns to the hard glass state and resets to its initial state, thus facilitating the support of the elastic buffer again. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of the cage in Embodiment 1 of this application; Figure 2 This is an exploded view of the overall structure of the cage in Embodiment 1 of this application; Figure 3 This is an exploded cross-sectional view of a portion of the cage structure in Embodiment 1 of this application; Figure 4 This is a partial structural cross-sectional view of the cage in Embodiment 1 of this application; Figure 5 For this application Figure 4 Enlarged view of point A in the middle; Figure 6 This is a schematic diagram of the overall structure of the cage in Embodiment 1 of this application; Figure 7 This is a cross-sectional view of the overall structure of the cage in Embodiment 1 of this application; Figure 8 This is a partial structural diagram of the cage in Embodiment 1 of this application, to highlight the spring clip; Figure 9 This is a partial structural cross-sectional view of the cage in Embodiment 1 of this application; Figure 10 This is a schematic diagram of the overall structure of the bearing in Embodiment 2 of this application; Figure 11 This is an exploded view of the overall structure of the bearing in Embodiment 2 of this application.

[0026] Reference numerals: 1. Main ring body; 2. Secondary ring body; 3. Connecting body; 4. Pocket; 5. Elastic buffer; 6. First oil storage chamber; 7. Capillary micropore; 8. Slider; 9. Mounting groove; 10. Dovetail groove; 11. Oil supply channel; 12. Second oil storage chamber; 14. Plug; 15. One-way breather; 16. First connecting hole; 17. Convex ring; 18. Second connecting hole; 19. Elastic pull rope; 20. Plug ball; 21. Oil collection groove; 22. Oil collection chamber; 23. First through hole; 24. Spring piece; 25. Shape memory support rod; 26. Heat-conducting plate; 27. Wear-resistant coating; 28. Locking claw; 29. ​​Locking hole; 30. Second deformation gap; 31. First deformation gap; 32. Outer ring; 33. Inner ring; 34. Rolling element. Detailed Implementation

[0027] The following is in conjunction with the appendix Figures 1-11 This application will be described in further detail.

[0028] Example 1: This application discloses a cage.

[0029] Reference Figure 1 and Figure 2 A retainer includes a main ring body 1, a secondary ring body 2, and multiple connecting bodies 3. The connecting bodies 3 are integrally formed on the side wall of the main ring body 1. The multiple connecting bodies 3 are arranged at equal intervals along the circumference of the main ring body 1, and a pocket 4 is formed between two adjacent connecting bodies 3. Each connecting body 3 has a locking claw 28 at its end away from the main ring body 1. The secondary ring body 2 has multiple locking holes 29 at equal intervals along its own circumference, and the multiple locking holes 29 correspond one-to-one with the multiple locking claws 28.

[0030] When assembling the cage, the secondary ring 2 is installed at the ends of multiple connectors 3 away from the main ring 1, and multiple locking claws 28 pass through multiple locking holes 29 respectively. The ends of the locking claws 28 extend out of the locking holes 29. The ends of the locking claws 28 are stamped using a stamping tool, and the locking claws 28 can lock the secondary ring 2, thereby completing the assembly of the cage.

[0031] Reference Figure 2 and Figure 3Each connector 3 has a removable elastic buffer 5 mounted on each of its opposite side walls near the pocket 4. A mounting groove 9 is formed on the side wall of the connector 3 near the pocket 4, and a dovetail groove 10 is formed on the inner wall of the mounting groove 9. Both the mounting groove 9 and the dovetail groove 10 are open on the side away from the main ring 1. The elastic buffer 5 is slidably inserted into the mounting groove 9 along the direction parallel to the axis of the main ring 1. A trapezoidal slider 8 is integrally formed on the side wall of the elastic buffer 5 away from the pocket 4, and the slider 8 is slidably inserted into the dovetail groove 10 along the direction parallel to the axis of the main ring 1. In this application, the elastic buffer 5 can be made of materials such as TPEE, TPAE, or TPV.

[0032] When assembling the cage, the elastic buffer 5 is first inserted into the mounting groove 9 of the connecting body 3. The connecting body 3 then drives the slider 8 to insert into the dovetail groove 10. At this time, a first deformation gap 31 is formed between the upper and lower side walls of the elastic buffer 5 and the upper and lower inner walls of the mounting groove 9, allowing the elastic buffer 5 to deform. Then, the secondary ring 2 is installed on the connecting body 3. The secondary ring 2 cooperates with the main ring 1 to clamp and fix the elastic buffer 5, and the slider 8 cooperates with the dovetail groove 10, so that the elastic buffer 5 is stably fixed in the mounting groove 9.

[0033] Reference Figure 4 , Figure 5 and Figure 6 The elastic buffer 5 has a first oil reservoir 6, which stores lubricating oil. The elastic buffer 5 has a plurality of micropores 7 spaced apart on the side wall near the pocket 4, and one end of the micropores 7 is connected to the first oil reservoir 6.

[0034] The elastic buffer 5 is recessed near the side wall of the pocket 4, and the concave surface of the elastic buffer 5 contacts the rolling element. A wear-resistant coating 27 is provided on the concave surface of the elastic buffer 5. In this application, the wear-resistant coating 27 can be selected as a diamond-like carbon coating, a molybdenum disulfide coating, a polytetrafluoroethylene coating, or a titanium nitride coating. Using the wear-resistant coating 27 reduces the frictional loss between the elastic buffer 5 and the rolling element.

[0035] When the bearing speed and load exhibit time-varying unsteady changes, the rolling elements will impact the elastic buffer 5 installed on the side wall of the connecting body 3. Upon impact, the elastic buffer 5 undergoes elastic compression deformation, thereby buffering and absorbing the impact energy of the rolling elements. Simultaneously, under the impact of the rolling elements, the lubricating oil stored in the first oil reservoir 6 inside the elastic buffer 5 is squeezed out through the capillary pores 7. The released lubricating oil lubricates the surface of the rolling elements, effectively mitigating the accelerated wear problem faced by the cage under unsteady conditions such as variable speed and load.

[0036] Reference Figure 4 , Figure 6 and Figure 7The main ring body 1 has a circular oil supply channel 11 formed along its circumference. Each connecting body 3 has a second oil storage chamber 12, and the end of each second oil storage chamber 12 is connected to the oil supply channel 11. An oil filling port is provided on the side wall of the main ring body 1 away from the connecting body 3. A plug 14 is threaded onto the oil filling port of the main ring body 1. In this application, the plug 14 can be a bolt.

[0037] A one-way vent 15 is installed on the side wall of the main ring body 1 away from the connecting body 3. The one-way vent 15 and the oil inlet are symmetrically installed along the diameter direction of the main ring body 1. Outside air enters the oil supply channel 11 through the one-way vent 15, and the air in the oil supply channel 11 is blocked from escaping by the one-way vent 15.

[0038] Reference Figure 3 and Figure 5 The connecting body 3 is located on both sides of the second oil storage cavity 12 near the pocket 4 and has a second connecting hole 18. One end of the second connecting hole 18 is connected to the second oil storage cavity 12. A protruding ring 17 is fixedly installed on the inner wall of the dovetail groove 10 and at the end of the second connecting hole 18 away from the second oil storage cavity 12.

[0039] Both the inner and outer walls of the convex ring 17 are chamfered, and the insertion end of the slider 8 is also chamfered. A first connecting hole 16 is provided inside the slider 8. One end of the first connecting hole 16 is connected to the first oil storage cavity 6. The slider 8 is located in the first connecting hole 16 away from the first oil storage cavity 6 and is equipped with a ball stop 20 by an elastic pull rope 19.

[0040] When the slider 8 is inserted into the dovetail groove 10, the slider 8 moves past the convex ring 17 under the action of its own chamfer and the outer annular chamfer of the convex ring 17. When the slider 8 is inserted into the correct position, the convex ring 17 is inserted into the end of the first connecting hole 16 and connects the first connecting hole 16 with the second connecting hole 18. At this time, the plug ball 20 abuts against the inner annular chamfer of the convex ring 17 and seals the convex ring 17.

[0041] Workers inject lubricating oil into the oil supply channel 11 through the oil inlet. The lubricating oil flows sequentially through the second oil storage chamber 12 in the connector 3, and then enters the first oil storage chamber 6 of the elastic buffer 5 through the second connecting hole 18 and the first connecting hole 16. When the elastic buffer 5 is compressed and deformed by the impact of the rolling element, the elastic pull rope 19 pulls the stop ball 20 to form a sealing fit with the convex ring 17, preventing the lubricating oil in the first oil storage chamber 6 from flowing back to the second oil storage chamber 12, so that the lubricating oil in the first oil storage chamber 6 is squeezed out through the capillary micropores 7.

[0042] When the elastic buffer 5 rebounds, a negative pressure is formed in the first oil reservoir 6. The ball stopper 20 moves towards the first oil reservoir 6 and opens the convex ring 17, thereby drawing the lubricating oil from the oil supply channel 11 and the second oil reservoir 12 into the first oil reservoir 6 through the second connecting hole 18 and the first connecting hole 16, thus achieving continuous oil supply to the capillary pores 7. At the same time, during the rebound of the elastic buffer 5, outside air is drawn into the oil supply channel 11 through the one-way vent 15 to balance the pressure in the flow channel and prevent a vacuum effect caused by the lubricating oil being sucked out, thereby avoiding obstruction of oil replenishment.

[0043] Reference Figure 3 , Figure 5 and Figure 8 An oil collecting groove 21 is provided on the concave surface of the elastic buffer 5. The oil collecting groove 21 is provided along the direction parallel to the axis of the main ring body 1 and along the rolling direction of the rolling element. The oil collecting groove 21 is arranged on the side of the capillary micropore 7 away from the axis of the main ring body 1. An oil collecting cavity 22 is formed inside the elastic buffer 5, and the oil collecting cavity 22 is connected to the oil collecting groove 21.

[0044] The elastic buffer 5 has a first through hole 23 connecting the oil collecting cavity 22 and the first oil storage cavity 6. The side of the first through hole 23 closest to the first oil storage cavity 6 is inclined away from the axis of the main ring body 1. A spring piece 24 is embedded in the inner wall of the elastic buffer 5 in the first oil storage cavity 6. The narrower end of the spring piece 24 is fixedly connected to the elastic buffer 5, and the spring piece 24 covers the end of the first through hole 23.

[0045] Lubricating oil squeezed out from the capillary micropores 7 adheres to the surface of the concave sidewall of the elastic buffer 5. During the rolling process, it drives the lubricating oil to move along the sidewall of the elastic buffer 5. When the lubricating oil moves to the position of the oil collection groove 21, it enters the oil collection chamber 22 through the oil collection groove 21. When the elastic buffer 5 is compressed and deformed, the spring plate 24 closes the first through hole 23; when the elastic buffer 5 rebounds, a negative pressure is formed in the first oil storage chamber 6. Under the action of the pressure difference, the spring plate 24 moves and opens the first through hole 23, and the lubricating oil in the oil collection chamber 22 is then sucked into the first oil storage chamber 6, thereby realizing the recovery and reuse of lubricating oil.

[0046] Reference Figure 5 , Figure 8 and Figure 9 The elastic buffer 5 is located in the first oil storage cavity 6 and is equipped with multiple shape memory support rods 25 at intervals. The shape memory support rods 25 are installed along the direction parallel to the tangent of the main ring body 1. Two heat-conducting plates 26 are fixedly embedded on the concave side wall of the elastic buffer 5. The ends of the two heat-conducting plates 26 are inserted into the elastic buffer 5, and the two heat-conducting plates 26 respectively abut against the multiple shape memory support rods 25.

[0047] One end of the shape memory support rod 25 is fixedly connected to the inner wall of the first oil storage cavity 6 away from the capillary pore 7, and a second deformation gap 30 is formed between the other end of the shape memory support rod 25 and the inner wall of the first oil storage cavity 6 near the capillary pore 7. In this application, the shape memory support rod 25 can be made of polymer materials such as polyethylene, polyisoprene, polyester, copolyester, polyamide, copolyamide, and polyurethane. The shape memory support rod 25 has a critical temperature T (60-70℃). When the ambient temperature is below T, the shape memory support rod 25 is in a hard glass state; when the ambient temperature is above T, the shape memory support rod 25 transforms into a soft rubber state.

[0048] The heat generated by the rolling elements is transferred to the shape memory support rod 25 via the heat-conducting plate 26. When the bearing is in a low-temperature condition below the critical temperature T, the wear of the rolling elements is low, and the shape memory support rod 25 remains in a hard glassy state. Under the constraint of the hard support rod, the second deformation gap 30 provides a small amount of compressive deformation for the elastic buffer 5 when it is impacted, thereby reducing the amount of lubricating oil squeezed out of the capillary micropores 7.

[0049] When the bearing is under high-temperature conditions above the critical temperature T, the wear of the rolling elements intensifies. At this time, the shape memory support rod 25 transforms into a soft rubber state and no longer provides support for the elastic buffer 5. Therefore, the amount of compression deformation of the elastic buffer 5 under impact increases, and the amount of lubricating oil squeezed out of the capillary micropores 7 increases accordingly, thereby effectively reducing the frictional loss of the rolling elements.

[0050] When the bearing temperature drops below the critical temperature T again, the shape memory support rod 25 returns to the hard glass state and resets to its initial state, re-supporting the elastic buffer 5 and preparing for the next working cycle.

[0051] The implementation principle of a cage according to an embodiment of this application is as follows: When the bearing speed and load exhibit time-varying unsteady changes, the rolling element will impact the elastic buffer 5 installed on the side wall of the connecting body 3. Upon impact, the elastic buffer 5 undergoes elastic compression deformation, thereby buffering and absorbing the impact energy of the rolling element. Simultaneously, under the impact of the rolling element, the lubricating oil stored in the first oil reservoir 6 inside the elastic buffer 5 is squeezed out through the capillary pores 7. The released lubricating oil lubricates the surface of the rolling element, effectively alleviating the problem of accelerated wear faced by the cage under unsteady conditions such as variable speed and load.

[0052] Example 2: This application discloses a bearing.

[0053] Reference Figure 10 and Figure 11A bearing employing the aforementioned cage further includes an outer ring 32, an inner ring 33, and a plurality of rolling elements 34. The rolling elements 34 are installed within a plurality of pockets 4 of the cage, and opposite sides of the rolling elements 34 abut against elastic buffers 5 on two connecting bodies 3. Raceways are formed on the inner circumferential side of the outer ring 32 and the outer circumferential side of the inner ring 33. The cage is located between the inner ring 32 and the outer ring 33, and the rolling elements 34 are rotatably mounted in the raceways of the outer ring 32 and the inner ring 33.

[0054] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A cage, characterized in that: The device includes a main ring body (1), a secondary ring body (2), and multiple connecting bodies (3). The multiple connecting bodies (3) are fixedly arranged at equal intervals along the circumference of the main ring body (1) on the outer side wall of the main ring body (1). The secondary ring body (2) is detachably fixed at the end of the multiple connecting bodies (3) away from the main ring body (1). A pocket (4) is formed between two adjacent connecting bodies (3). An elastic buffer (5) is provided on the opposite side walls of the connecting body (3) near the pocket (4). A first oil storage cavity (6) is formed in the elastic buffer (5). The first oil storage cavity (6) stores lubricating oil. Multiple capillary micropores (7) are spaced apart on the side wall of the elastic buffer (5) near the pocket (4). The end of the capillary micropores (7) is connected to the first oil storage cavity (6).

2. A retainer according to claim 1, characterized in that: A slider (8) is fixedly installed on the outer side wall of the elastic buffer (5) away from the capillary micropore (7). An installation groove (9) is provided on the side wall of the connector (3) near the pocket (4). A dovetail groove (10) is provided on the inner wall of the connector (3) in the installation groove (9). The installation groove (9) and the dovetail groove (10) are both open at the end away from the main ring body (1). The elastic buffer (5) is slidably installed in the installation groove (9) along the diameter direction of the main ring body (1). The slider (8) is slidably installed in the dovetail groove (10) along the diameter direction of the main ring body (1).

3. A retainer according to claim 2, characterized in that: The main ring body (1) has an oil supply channel (11) circumferentially arranged inside it. Each of the connecting bodies (3) has a second oil storage chamber (12) circumferentially arranged inside it. Each second oil storage chamber (12) is connected to the oil supply channel (11). One second oil storage chamber (12) is connected to two first oil storage chambers (6). The side wall of the main ring body (1) is provided with an oil inlet that is connected to the oil supply channel (11). The main ring body (1) is provided with a detachable plug (14) inside the oil inlet. The side wall of the main ring body (1) is provided with a one-way vent (15) that is connected to the oil supply channel (11). Outside air enters the oil supply channel (11) through the one-way vent (15).

4. A retainer according to claim 3, characterized in that: The slider (8) has a first connecting hole (16) which communicates with the first oil storage chamber (6). The connecting body (3) has a convex ring (17) fixedly installed on the inner wall of the dovetail groove (10). The connecting body (3) has a second connecting hole (18) in the convex ring (17) which communicates with the second oil storage chamber (12). The convex ring (17) is inserted into the first connecting hole (16).

5. A retainer according to claim 4, characterized in that: The slider (8) is provided with an elastic pull rope (19) inside the first connecting hole (16). A ball stopper (20) is provided on the elastic pull rope (19). When the protruding ring (17) is inserted into the first connecting hole (16), the ball stopper (20) blocks the protruding ring (17).

6. A retainer according to claim 1, characterized in that: An oil collecting groove (21) is provided on the side wall of the elastic buffer (5) near the pocket (4). An oil collecting cavity (22) communicating with the oil collecting groove (21) is formed in the elastic buffer (5). A first through hole (23) communicating with the oil collecting cavity (22) and the first oil storage cavity (6) is provided in the elastic buffer (5). A spring piece (24) is provided on the inner wall of the elastic buffer (5) located in the first oil storage cavity (6). The spring piece (24) blocks the first through hole (23).

7. A retainer according to claim 1, characterized in that: The elastic buffer (5) is located in the first oil storage cavity (6) and is provided with a plurality of shape memory support rods (25) at intervals. The shape memory support rods (25) are arranged along the tangent direction parallel to the main ring (1). When the temperature of the shape memory support rod (25) is lower than the critical temperature T, the shape memory support rod (25) is in a hard glass state. When the temperature of the shape memory support rod (25) is higher than the critical temperature T, the shape memory support rod (25) is in a soft rubber state, and the critical temperature T is between 60-70℃.

8. A retainer according to claim 7, characterized in that: The elastic buffer (5) has multiple heat-conducting plates (26) embedded on the side wall near the pocket (4).

9. A retainer according to claim 1, characterized in that: The elastic buffer (5) has a wear-resistant coating (27) formed on the side wall near the pocket (4).

10. A bearing, characterized in that: The cage according to any one of claims 1-9 further includes an outer ring (32), an inner ring (33) and a plurality of rolling elements (34), the cage being located between the outer ring (32) and the inner ring (33), and the plurality of rolling elements (34) being disposed in a plurality of pockets (4) of the cage.

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