High-speed deep-groove ball bearing retainer with oil reservoir structure

Abstract

The application relates to a high-speed deep-groove ball bearing retainer with an oil storage groove structure, characterized in that a plurality of ball arc-shaped pockets are arranged in the circumferential direction of the high-speed deep-groove ball bearing retainer, oil guide grooves are arranged between adjacent pockets, the arranged oil guide grooves can ensure that lubricating grease is guided in the circumferential direction of the retainer. Axial through holes exist between adjacent pockets, which are beneficial to the axial movement of lubricating grease and improve the flowability of the lubricating grease. Circumferential and axial arc-shaped oil storage grooves are arranged in each pocket, so that the retainer and rolling elements are fully lubricated, the heat generated by rolling friction is reduced, and the purpose of bearing temperature rise is achieved. Meanwhile, a circular arc modification design is performed on the side end face far from the retainer claw part, the weight of the retainer is reduced, and the rotational inertia under high speed is reduced, so that the vibration performance requirement of the high-speed bearing is met; and the modification radius is reasonably arranged, so that the stability of the retainer during operation can be improved.

Description

Technical Field

[0001] This invention relates to the field of bearing technology, and in particular to a high-speed deep groove ball bearing cage with an oil reservoir structure. Background Technology

[0002] Deep groove ball bearings, as fundamental components in modern machinery manufacturing, have a significant impact on the performance and reliability of major equipment and main products. Their main function is to support rotating mechanical parts, reduce the coefficient of friction during operation, and ensure rotational accuracy.

[0003] Deep groove ball bearings mainly consist of four parts: an outer ring, an inner ring, steel balls, and a cage. Cage fracture, deformation, and other failures, as well as unstable movement, are significant causes of vibration, noise, and overall failure in high-speed deep groove ball bearings. During high-speed rotation, the large contact area between the bearing cage and the steel balls, coupled with poor lubrication, leads to significant sliding friction and generates substantial heat. This uneven temperature rise at high speeds directly impacts the bearing's performance and lifespan.

[0004] Chinese patent CN202010699120.0 discloses a high-speed bearing cage, including a frame body, multiple pockets at the upper end of the frame body, and an annular groove at the bottom of the frame body. The bottom of the connecting portion between adjacent pockets has an upwardly concave arc surface. A grease cavity is provided within the connecting portion, with its bottom opening located within the annular groove. An oil groove is provided on the inner surface of each pocket. The connecting portion consists of two parts: the lower part is the same thickness as the frame body, and the upper part is thinner than the lower part, forming a step with the lower part on the outer side of the connecting portion. The step has an oil guide hole communicating with the corresponding grease cavity below. This cage, through the design of the arc surface, step, and oil guide hole, achieves advantages such as reduced weight, upward shift of the center of gravity, and enhanced lubrication, while maximizing the strength of the pocket claw openings. This balances weight reduction with improved lubrication, ensuring the strength and stability of the pockets and preventing significant deformation. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies, such as vibration noise and uneven temperature rise, by providing a high-speed deep groove ball bearing cage with an oil reservoir structure. The cage has several spherical arc-shaped pockets in the circumferential direction, with oil guide grooves between adjacent pockets to ensure the smooth flow of grease along the cage's circumference. An axial through-hole exists between adjacent pockets, facilitating axial movement of the grease and improving its fluidity. Circumferential and axial arc-shaped oil reservoirs are formed inside each pocket to ensure sufficient lubrication between the cage and the rolling elements, reducing heat generated by rolling friction and thus mitigating bearing temperature rise. Simultaneously, a rounded profile design is applied to the end face away from the cage claws to reduce cage weight and rotational inertia at high speeds, thereby meeting the vibration performance requirements of high-speed bearings. Furthermore, a reasonably set profile radius can increase the stability of the cage during operation.

[0006] The objective of this invention can be achieved through the following technical solutions:

[0007] A high-speed deep groove ball bearing cage with an oil reservoir structure includes a cage body and pockets. Multiple pockets are circumferentially disposed on the upper end of the cage body. The cage body includes an outer end face and an inner end face. An outer oil guide groove is provided at the upper end of the outer end face, and an inner oil guide groove is provided at the upper end of the inner end face. The outer and inner oil guide grooves are connected to adjacent pockets. The outer and inner oil guide grooves are used to ensure that grease flows around the cage circumferentially. The pockets are used to hold the steel balls in the deep groove ball bearing.

[0008] Furthermore, the cage includes cage claws disposed between adjacent pockets, and the top of the cage claws is provided with a shaping arc. The shaping arc is used to change the distance between adjacent cage claws. By setting this distance, the possibility of the cage falling off after dimensional expansion in a high-temperature environment is reduced, and the convenience of demolding and assembly can be met.

[0009] Furthermore, setting a reasonable size for the modified arc ensures the distance between the claws and reduces the radial movement of the steel balls.

[0010] Furthermore, the pocket is spherical and has a uniform wall thickness. When the cage operates at high speed, the deformation of the pocket shape is minimized, which is beneficial for guiding the steel ball to operate stably.

[0011] Furthermore, the frame is a ring structure, and the frame is provided with a number of pockets, which are arranged on the frame in a circumferential direction at equal intervals.

[0012] Furthermore, the inner surface of the pocket is symmetrically provided with two axial arc-shaped oil reservoirs, which penetrate the outer end face and the inner end face. The axial arc-shaped oil reservoirs are connected to the outer oil guide groove and the inner oil guide groove, so that the grease can flow directly into the axial arc-shaped oil reservoir through the outer oil guide groove and the inner oil guide groove. This can promote the flow of grease between the outer and inner sides of the cage, making the grease more evenly distributed inside the bearing and increasing the lubrication effect between the outer raceway and the steel ball, as well as between the inner raceway and the steel ball.

[0013] Furthermore, the axial arc-shaped oil storage tank is a circular arc-shaped oil storage tank, and the width-to-height ratio of the axial arc-shaped oil storage tank is 8:5.

[0014] Furthermore, the inner surface of the pocket is provided with a circumferential arc-shaped oil storage groove, which is connected to two axial arc-shaped oil storage grooves at the same time. The circumferential arc-shaped oil storage groove is located at the middle of the bottom of the pocket, and its width to height ratio is 8:5.

[0015] By adopting the above technical solution, it is beneficial to ensure the contact lubrication and oil storage between the steel ball and the pocket, as well as the flow of grease, during the high-speed operation of the cage, so as to quickly remove the heat inside the pocket and maintain the stability of the pocket shape.

[0016] Furthermore, the frame is composed of two plate-like structures, with the pocket positioned between the two plate-like structures. One plate-like structure is connected to the outer end face, and the other plate-like structure is connected to the inner end face. The thickness of the two plate-like structures is not less than 1 / 6 of the frame thickness. By setting a reasonable thickness for the two plate-like structures, the rigidity of the cage is improved, maximizing the strength requirements of the pocket at high speeds and ensuring that the cage can withstand the centrifugal force at high speeds even if it undergoes excessive deformation. This helps to reduce the cage breakage phenomenon and also minimizes the thickness and mass.

[0017] Furthermore, the outer and inner oil guide grooves are arc-shaped smooth transition structures. The outer oil guide groove is tangent to the outer end face and tangent to the cage claw portion. The inner oil guide groove is tangent to the inner end face and tangent to the cage claw portion. The outer and inner oil guide grooves are respectively connected along the circumferential direction of the high-speed deep groove ball bearing.

[0018] By adopting the above technical solution, the outer and inner oil guide grooves are connected to the catch, which increases the oil storage volume and improves the cage's ability to store lubricating grease. Furthermore, it significantly improves the axial flow performance of the lubricating grease along the cage, ensuring that the grease is distributed as evenly as possible within the deep groove ball bearing, effectively reducing localized grease buildup or insufficient grease, and resulting in good bearing lubrication. Simultaneously, selecting an arc-shaped oil guide groove, along with its smooth transition structure and tangency to the outer (inner) end face and the cage claw end face, reduces the impact of the oil guide groove on stress concentration in the cage.

[0019] Furthermore, the bottom end of the frame is provided with multiple modified arc grooves, which are located below the cage claws. The modified arc grooves are used to reduce the weight of the cage itself, thereby reducing the moment of inertia of the cage during high-speed rotation, which helps to reduce the effect of centrifugal force on the structure itself. By setting a reasonable modification radius, the stability of the cage during rotation can be improved, while reducing the vibration amplitude of the bearing under normal high-speed operation.

[0020] Furthermore, a through hole is provided between adjacent pockets. The through hole is located between the outer end face and the inner end face. The through hole passes through the cage claw portion and is used to allow the grease to flow along the axial direction of the cage, thereby improving the fluidity of the grease.

[0021] The principle of this invention is as follows:

[0022] This invention, by incorporating a circumferential arc-shaped oil reservoir, an axial arc-shaped oil reservoir, an outer oil guide groove, and an inner oil guide groove, creates a lubrication system for the grease both inside and outside the cage. This improves the lubrication effect between the cage balls and other components, reducing rolling friction between the balls and other parts compared to traditional cages, and also mitigating excessive bearing temperature rise. Therefore, it also improves the stability and service life of the bearing during high-speed rotation.

[0023] Compared with the prior art, the advantages of the present invention are as follows:

[0024] 1. This invention accelerates the flow of grease inside the cage by setting an outer oil guide groove and an inner oil guide groove structure. At the same time, with the circumferential arc-shaped oil reservoir and the axial arc-shaped oil reservoir, the lubrication effect of the steel balls and the cage is greatly improved during the high-speed rotation of the cage between the inner and outer rings, reducing the heat generated by rolling friction, thereby reducing the bearing temperature rise and improving the service life of high-speed deep groove ball bearings.

[0025] 2. The modified arc groove provided by the present invention reduces the mass of the cage itself and the moment of inertia under high speed conditions, thereby meeting the vibration performance requirements of high-speed bearings. Furthermore, the reasonable setting of the modification radius can increase the stability of the cage during operation.

[0026] 3. The outer and inner oil guide groove structures provided by the present invention can ensure that the grease is guided along the circumference of the cage;

[0027] 4. The present invention provides an axial through hole between adjacent pockets, which facilitates the axial movement of grease and improves the fluidity of the grease;

[0028] 5. This invention ensures sufficient lubrication between the cage and the rolling elements by opening circumferential and axial arc-shaped oil reservoirs inside each pocket, thereby reducing the heat generated by rolling friction and achieving the purpose of bearing temperature rise. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of the present invention;

[0030] Figure 2 This is a schematic diagram of the structure of the present invention;

[0031] Figure 3 This is a front view of the present invention.

[0032] The reference numerals are as follows: 1. Pocket, 2. Outer end face, 3. Inner end face, 4. Outer oil guide groove, 5. Inner oil guide groove, 6. Cage claw, 7. Shaped arc, 8. Shaped arc groove, 9. Through hole, 10. Axial arc-shaped oil reservoir, 11. Circumferential arc-shaped oil reservoir. Detailed Implementation

[0033] In the description of this invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0034] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0035] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0036] Example

[0037] See Figures 1 to 3 This embodiment provides a high-speed deep groove ball bearing cage with an oil reservoir structure, which is applied to deep groove ball bearings.

[0038] A high-speed deep groove ball bearing cage with an oil reservoir structure includes a cage body and pockets 1. Multiple pockets 1 are provided on the upper end of the cage body in the circumferential direction. The cage body includes an outer end face 2 and an inner end face 3. An outer oil guide groove 4 is provided on the upper end of the outer end face 2, and an inner oil guide groove 5 is provided on the upper end of the inner end face 3. The outer oil guide groove 4 and the inner oil guide groove 5 are connected to adjacent pockets 1. The outer oil guide groove 4 and the inner oil guide groove 5 are used to ensure that the grease is guided around the circumference of the cage. The pockets 1 are used to hold the steel balls in the deep groove ball bearing.

[0039] The high-speed deep groove ball bearing of this invention can be applied to various fields, and the rolling element selected for the high-speed deep groove ball bearing is a steel ball.

[0040] In this embodiment, the retainer includes retainer claws 6, which are disposed between adjacent pockets 1. The top of the retainer claws 6 is provided with a shaping arc 7, which is used to change the distance between adjacent retainer claws 6. By setting this distance, the possibility of the retainer falling off after dimensional expansion in a high-temperature environment is reduced, and the convenience of demolding and assembly can be met.

[0041] In this embodiment, the size of the modified arc 7 is set to ensure the distance between the retainer claws 6, thereby reducing the radial movement of the steel ball.

[0042] In this embodiment, the pocket 1 is spherical and has a uniform wall thickness. When the cage operates at high speed, the deformation of the pocket 1 shape is minimized, which is beneficial for guiding the steel ball to operate stably.

[0043] In this embodiment, the frame is a ring structure, and the frame is provided with a plurality of pockets 1, which are arranged on the frame in a circumferential direction and at equal intervals.

[0044] In this embodiment, two axial arc-shaped oil reservoirs 10 are symmetrically provided on the inner surface of the pocket 1. The two axial arc-shaped oil reservoirs 10 penetrate the outer end face 2 and the inner end face 3. The axial arc-shaped oil reservoirs 10 are simultaneously connected to the outer oil guide groove 4 and the inner oil guide groove 5, so that the grease can flow directly into the axial arc-shaped oil reservoirs 10 through the outer oil guide groove 4 and the inner oil guide groove 5. This can promote the flow of grease between the outer and inner sides of the cage, making the grease more evenly distributed inside the bearing, and increasing the lubrication effect between the outer raceway and the steel ball, as well as between the inner raceway and the steel ball.

[0045] In this embodiment, the axial arc-shaped oil storage tank 10 is a circular arc-shaped oil storage tank, and the width-to-height ratio of the axial arc-shaped oil storage tank 10 is 8:5.

[0046] In this embodiment, the inner surface of the pocket 1 is provided with a circumferential arc-shaped oil storage groove 11, which is connected to two axial arc-shaped oil storage grooves 10. The circumferential arc-shaped oil storage groove 11 is located at the middle of the bottom of the pocket 1, and its width to height ratio is 8:5.

[0047] By adopting the above technical solution, it is beneficial to ensure the contact lubrication and oil storage between the steel ball and the pocket 1 and the flow of grease during the high-speed operation of the cage, so as to quickly remove the heat inside the pocket 1 and maintain the stability of the shape of the pocket 1.

[0048] In this embodiment, the frame is composed of two plate-like structures, and the pocket 1 is disposed between the two plate-like structures. One plate-like structure is connected to the outer end face 2, and the other plate-like structure is connected to the inner end face 3. The thickness of the two plate-like structures is not less than 1 / 6 of the frame thickness. By setting a reasonable thickness for the two plate-like structures, the rigidity of the cage is improved, the strength requirements of the pocket 1 at high speed are guaranteed to the maximum extent, and the cage is protected from excessive deformation. It can withstand the centrifugal force at high speed, which helps to reduce the cage breakage phenomenon and also minimizes the thickness and mass.

[0049] In this embodiment, the outer oil guide groove 4 and the inner oil guide groove 5 are arc-shaped smooth transition structures. The outer oil guide groove 4 is tangent to the outer end face 2 and the outer oil guide groove 4 is tangent to the cage claw portion 6. The inner oil guide groove 5 is tangent to the inner end face 3 and the inner oil guide groove 5 is tangent to the cage claw portion 6. The outer oil guide groove 4 and the inner oil guide groove 5 are respectively connected along the circumferential direction of the high-speed deep groove ball bearing.

[0050] By adopting the above technical solution, after the outer oil guide groove 4 and the inner oil guide groove 5 are connected to the pocket 1, on the one hand, the oil storage volume is increased, improving the cage's ability to store lubricating grease; on the other hand, the grease flow performance along the cage axial direction is significantly improved, making the grease as evenly distributed as possible inside the deep groove ball bearing, effectively reducing local grease accumulation or lack of grease, and forming good bearing lubrication. At the same time, the oil guide groove is selected to be arc-shaped, and the arc-shaped smooth transition structure and the tangency with the outer end face 2 (inner end face 3) and the end face of the cage claw 6 can reduce the influence of the oil guide groove on the stress concentration of the cage.

[0051] In this embodiment, the bottom end of the frame is provided with a plurality of modified arc grooves 8, which are located below the cage claw portion 6. The modified arc grooves 8 are used to reduce the weight of the cage itself, thereby reducing the moment of inertia of the cage when rotating at high speed, which helps to reduce the effect of centrifugal force on the structure itself. By setting a reasonable modification radius, the stability of the cage during rotation can be improved, while reducing the vibration amplitude of the bearing under normal high-speed operation.

[0052] In this embodiment, a through hole 9 is provided between adjacent pocket holes 1. The through hole 9 is located between the outer end face 2 and the inner end face 3. The through hole 9 passes through the cage claw portion 6. The through hole 9 is used to allow the grease to flow along the axial direction of the cage, thereby improving the fluidity of the grease.

[0053] The above description of the embodiments is provided to enable those skilled in the art to understand and use the invention. It will be apparent to those skilled in the art that various modifications can be made to these embodiments, and the general principles described herein can be applied to other embodiments without inventive effort. Therefore, the present invention is not limited to the above embodiments, and any improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the invention should be within the protection scope of the present invention.

Claims

1. A high-speed deep groove ball bearing cage with an oil reservoir structure, characterized in that, Includes frame and pockets (1). Multiple pockets (1) are provided circumferentially on the upper end of the frame. The frame includes an outer end face (2) and an inner end face (3). An outer oil guide groove (4) is provided on the upper end of the outer end face (2), and an inner oil guide groove (5) is provided on the upper end of the inner end face (3). The outer oil guide groove (4) and the inner oil guide groove (5) are connected to adjacent pockets (1). The outer oil guide groove (4) and the inner oil guide groove (5) are used to ensure that the grease is guided along the circumference of the cage. The pockets (1) are used to place the steel balls in the deep groove ball bearing. The inner surface of the pocket (1) is symmetrically provided with two axial arc-shaped oil reservoirs (10). The two axial arc-shaped oil reservoirs (10) penetrate the outer end face (2) and the inner end face (3). The axial arc-shaped oil reservoirs (10) are simultaneously connected to the outer oil guide groove (4) and the inner oil guide groove (5), so that the grease can flow directly into the axial arc-shaped oil reservoir (10) through the outer oil guide groove (4) and the inner oil guide groove (5). The inner surface of the pocket (1) is provided with a circumferential arc-shaped oil storage groove (11), which is connected to two axial arc-shaped oil storage grooves (10) at the same time. The circumferential arc-shaped oil storage groove (11) is located at the middle position of the bottom of the pocket (1).

2. The high-speed deep groove ball bearing cage with an oil reservoir structure according to claim 1, characterized in that, The cage includes a cage claw portion (6), which is disposed between adjacent pockets (1), and the top of the cage claw portion (6) is provided with a modified arc (7).

3. The high-speed deep groove ball bearing cage with an oil reservoir structure according to claim 1, characterized in that, The pocket (1) is spherical and the wall thickness of the pocket (1) is uniform.

4. A high-speed deep groove ball bearing cage with an oil reservoir structure according to claim 1, characterized in that, The frame is a ring structure, and the frame is provided with a number of pockets (1). The pockets (1) are arranged on the frame in a circumferential direction and at equal intervals.

5. A high-speed deep groove ball bearing cage with an oil reservoir structure according to claim 1, characterized in that, The outer oil guide groove (4) and the inner oil guide groove (5) are arc-shaped smooth transition structures, and the outer oil guide groove (4) and the inner oil guide groove (5) are respectively connected along the circumferential direction of the high-speed deep groove ball bearing.

6. A high-speed deep groove ball bearing cage with an oil reservoir structure according to claim 5, characterized in that, The outer oil guide groove (4) is tangent to the outer end face (2), the outer oil guide groove (4) is tangent to the cage claw portion (6), the inner oil guide groove (5) is tangent to the inner end face (3), and the inner oil guide groove (5) is tangent to the cage claw portion (6).

7. A high-speed deep groove ball bearing cage with an oil reservoir structure according to claim 1, characterized in that, The bottom of the frame is provided with multiple shaping arc grooves (8), which are located below the cage claws (6).

8. A high-speed deep groove ball bearing cage with an oil reservoir structure according to claim 1, characterized in that, A through hole (9) is provided between adjacent pockets (1). The through hole (9) is located between the outer end face (2) and the inner end face (3). The through hole (9) passes through the cage claw portion (6). The through hole (9) is used to allow the grease to flow along the axial direction of the cage, thereby improving the fluidity of the grease.

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