Dual seal ring combination seal structure for bearing

Abstract

The application discloses a double-seal ring combined sealing structure of a bearing and relates to the technical field of bearings.The double-seal ring combined sealing structure comprises a bearing outer ring, a bearing inner ring and bearing balls, the inner side surface of the bearing outer ring is provided with a rolling groove one, the outer side surface of the bearing inner ring is provided with a rolling groove two, the bearing balls roll between the rolling groove one of the bearing outer ring and the rolling groove two of the bearing inner ring, and a supporting assembly is arranged between the bearing outer ring and the bearing inner ring.The supporting assembly comprises a plurality of groups of ball retaining shells arranged between the bearing outer ring and the bearing inner ring, and the inner side walls of the two ball retaining shells of each group are fixedly connected with ball retaining sleeves.Through the deformable ball retaining sleeves, different sizes of bearing balls can be adaptively fitted and matched, compared with the prior art of directly replacing ball retaining shells of different sizes, the step of frequently replacing ball retaining shells to find suitable ball retaining shells for bearing balls is reduced, and the efficiency of stably assembling bearing balls is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of bearings, in particular to a double-seal-ring combined sealing structure of a bearing. BACKGROUND

[0002] In the bearing assembly process, the structural design of the ball retainer directly affects the stability of the bearing operation and the maintenance cost. The traditional ball retainer usually adopts a fixed size, and special ball retainers need to be customized for different sizes of balls. However, for different sizes of balls, the entire ball retainer must be disassembled and replaced. The rigid ball retainer cannot be compatible with different sizes of balls. If the rigid retainer is directly used to stabilize the ball, wear will occur between the ball and the retainer. Therefore, the user needs to frequently assemble and find a ball retainer that matches the ball. Moreover, the existing sealing structure is designed in a whole body. When the ball retainer needs to be repaired due to long-term wear, the entire ball retainer needs to be replaced. However, the wear in the ball retainer is only partial. If the entire ball retainer is directly replaced, it will cause resource waste and increase maintenance costs. SUMMARY

[0003] To solve the above technical problems, the present application provides a double-seal-ring combined sealing structure of a bearing.

[0004] The technical scheme is as follows:

[0005] The double-seal-ring combined sealing structure of the bearing comprises a bearing outer ring, a bearing inner ring, and bearing balls. The inner side surface of the bearing outer ring is provided with a rolling groove one. The outer side surface of the bearing inner ring is provided with a rolling groove two. The bearing balls roll between the rolling groove one of the bearing outer ring and the rolling groove two of the bearing inner ring. A support assembly is arranged between the bearing outer ring and the bearing inner ring.

[0006] The support assembly comprises a plurality of sets of ball retainer shells arranged between the bearing outer ring and the bearing inner ring. The plurality of sets of ball retainer shells are detachably connected. The inner side walls of the two ball retainer shells of each set are fixedly connected with ball retainer sleeves.

[0007] Each set of ball retainer shells comprises two ball retainer shells. The two ball retainer shells of each set are located on the two sides of a corresponding bearing ball. The inner side walls of the ball retainer sleeves are adapted in shape to the outer surfaces of the bearing balls. The ball retainer sleeves are made of a metal that can elastically deform.

[0008] Further, a gap is left between the bearing outer ring and the bearing inner ring. The bearing outer ring, the bearing inner ring, and the bearing balls are all made of high-temperature bearing steel. Lubricating oil is arranged in the gap between the bearing outer ring and the bearing inner ring. The bearing balls are arranged in a ring array.

[0009] Further, the support assembly further comprises threaded rods fixedly connected to both sides of each ball retaining shell, a set of fixing frames is arranged between each two adjacent sets of ball retaining shells, each fixing frame is provided with two, and an adjusting slot is formed in both sides of each fixing frame.

[0010] Further, the two fixing frames of each set are fixedly connected by rivets, each fixing frame is provided in the shape of a U, and each threaded rod passes through the corresponding adjusting slot and slides in the interior of the adjusting slot.

[0011] Further, the ends of each set of two fixing frames away from each other are flush with the ends of each set of two ball retaining shells away from each other, and the two ends of the fixing frame are in close contact with the corresponding ball retaining shell.

[0012] Further, the ball retaining shell is provided with a sealing assembly, the sealing assembly comprises a fixing rod fixedly connected to one side of each ball retaining shell away from the ball retaining sleeve, two anti-dropping thorns are fixedly connected to the end of each fixing rod away from the ball retaining shell, a sealing ring is attached to both sides of the gap between the bearing outer ring and the bearing inner ring, and a plurality of fixing grooves are formed in the two sealing rings.

[0013] Further, one side of each anti-dropping thorn away from the ball retaining shell is provided in the shape of an inclined surface, the material of the sealing ring is rubber, the outer edge and the inner edge of the sealing ring are provided with an extension ring, and each fixing groove corresponds to the position of the fixing rod.

[0014] As described above, the beneficial effects of the double-sealing-ring combined sealing structure of the bearing in the application are as follows:

[0015] Through the deformable ball retaining sleeve, different sizes of bearing balls can be adapted and fitted, compared with the existing method of directly replacing ball retaining shells of different sizes, the step of frequently replacing the ball retaining shell to find a suitable one is reduced, and the efficiency of stable assembly of the bearing ball is improved.

[0016] By replacing the single ball retaining shell in a disassembled manner, compared with the existing method of disassembling the entire ball retaining shell when the ball retaining sleeve is worn, resource waste can be avoided, and the replacement cost can be reduced by disassembling the single ball retaining shell;

[0017] The movable ball retaining shell enables the ball retaining sleeve to accommodate bearing balls larger than its deformation amount and stably support bearing balls smaller than its deformation amount, thereby expanding the size range of the bearing balls adapted by the two ball retaining sleeves; the two sides of the bearing outer ring and the bearing inner ring are sealed by the sealing ring and the two-side extending ring matched with the sealing ring, thereby preventing the lubricating oil in the gap between the bearing outer ring and the bearing inner ring from leaking, reducing the leakage of the lubricating oil, reducing the wear of the bearing balls during rolling between the bearing outer ring and the bearing inner ring, and prolonging the service life of the bearing outer ring, the bearing inner ring and the bearing balls. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a three-dimensional schematic view of the overall components of the application;

[0019] Figure 2 It is a three-dimensional schematic view of the ball retaining shell, ball retaining sleeve, bearing ball and other components of the application;

[0020] Figure 3 It is a three-dimensional schematic view of the bearing outer ring, bearing inner ring, ball retaining shell and other components of the application;

[0021] Figure 4 It is a three-dimensional schematic view of the bearing outer ring, bearing inner ring, bearing ball and other components of the application;

[0022] Figure 5 It is a three-dimensional schematic view of the fixed rod, sealing ring, fixed groove and other components of the application;

[0023] Figure 6 It is a three-dimensional schematic view of the fixed rod, anti-extraction thorn and other components of the application;

[0024] Figure 7 It is a three-dimensional schematic view of the overall components of the application;

[0025] Figure 8 It is a three-dimensional schematic view of the arrangement of the ball retaining shell, ball retaining sleeve, fixed frame and other components of the application.

[0026] In the application, the reference numerals are:

[0027] 1, bearing outer ring; 2, bearing inner ring; 3, bearing ball;

[0028] Supporting assembly: 41, ball retaining shell; 42, ball retaining sleeve; 43, threaded rod; 44, fixed frame; 45, adjusting groove; 46, nut

[0029] Sealing assembly: 51, fixed rod; 52, anti-extraction thorn; 53, sealing ring; 54, fixed groove. DETAILED DESCRIPTION

[0030] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0031] The embodiments provided by the present invention will be described in detail below:

[0032] like Figures 1 to 8 As shown, the bearing's double-seal combination sealing structure includes an outer bearing ring 1, an inner bearing ring 2, and bearing balls 3. The diameter of the inner bearing ring 2 is smaller than the diameter of the outer bearing ring 1. A gap is left between the outer bearing ring 1 and the inner bearing ring 2. The outer bearing ring 1, inner bearing ring 2, and bearing balls 3 are all made of high-temperature bearing steel to ensure that they can be used in high-temperature environments. A groove is formed on the inner surface of the outer bearing ring 1. The outer surface of the outer ring 2 is provided with a second groove. The bearing balls 3 roll between the first groove of the outer ring 1 and the second groove of the inner ring 2. Lubricating oil is provided in the gap between the outer ring 1 and the inner ring 2. The lubricating oil is used to lubricate the groove of the bearing balls 3 and reduce the wear of the bearing balls 3 when they roll in the gap between the outer ring 1 and the inner ring 2. Multiple bearing balls 3 are arranged in a ring array. A support component is provided in the gap between the outer ring 1 and the inner ring 2.

[0033] The support assembly includes multiple sets of ball retainer shells 41 disposed in the gap between the outer ring 1 and the inner ring 2 of the bearing. The multiple sets of ball retainer shells 41 are detachably connected. Each set of ball retainer shells 41 has two shells. The two ball retainer shells 41 in each set are located on both sides of a corresponding bearing ball 3. The inner sidewall of each set of two ball retainer shells 41 is fixedly connected to a ball retainer sleeve 42. The shape of the inner sidewall of the ball retainer sleeve 42 is adapted to the shape of the outer surface of the bearing ball 3. The ball retainer sleeve 42 can effectively fit against the outer surface of the bearing ball 3, so that the bearing ball 3 rolls stably between the first groove of the outer ring 1 and the second groove of the inner ring 2. The ball retainer sleeve 42 is made of elastically deformable metal to accommodate bearing balls 3 of different sizes.

[0034] In this design, by combining the two ball retainer shells 41 in each group, the ball retainer sleeve 42 fits against the bearing ball 3, stabilizing the bearing ball 3 as it rolls within the gap between the outer ring 1 and the inner ring 2 of the bearing. Simultaneously, when the ball retainer sleeve 42 and the bearing ball 3 are pressed together, the bearing ball 3 causes the ball retainer sleeve 42 to deform. This deformable ball retainer sleeve 42 allows for the fitting of bearing balls 3 of different sizes. Compared to the existing method of directly replacing ball retainer shells 41 of different sizes, this reduces the need for frequent replacements to find a suitable ball retainer shell 41 for the bearing ball 3, thus improving the efficiency of stable assembly of the bearing ball 3.

[0035] It should be noted that the ball retainer 42 can deform to adapt to bearing balls 3 of different sizes. It can only adapt to a small range of different sizes. For sizes with too large a difference, the ball retainer 41 needs to be replaced to adapt to bearing balls 3 of other sizes.

[0036] like Figure 2 , Figure 3 , Figures 5 to 8 As shown, the support assembly also includes threaded rods 43 fixedly connected to both sides of each ball retaining shell 41. A set of fixing brackets 44 is provided between each pair of adjacent ball retaining shells 41. Each set of fixing brackets 44 has two brackets. The two fixing brackets 44 in each set are fixedly connected by rivets. Each fixing bracket 44 is U-shaped. Each fixing bracket 44 has an adjustment groove 45 on both sides corresponding to the position of the threaded rod 43. Each threaded rod 43 passes through the adjacent adjustment groove 45 and can slide inside the adjustment groove 45. A nut 46 is threadedly connected to one end of each threaded rod 43 that passes through the adjustment groove 45.

[0037] It should be noted that the ends of the two adjusting grooves 45 on the two fixed brackets 44 that are far apart from each other are open, so that the threaded rod 43 can slide out from the adjusting groove 45, and further facilitates the removal of the ball retainer 41 from between the two fixed brackets 44.

[0038] For bearing balls 3 with excessively large size differences, if it is necessary to replace the ball retainer shell 41, it can be handled as follows: loosen the nut 46 threaded to the threaded rod 43 so that the nut 46 falls off the threaded rod 43, and then remove the two sets of ball retainer shells 41 from the two sets of fixing brackets 44 to both sides. During this process, the ball retainer shell 41 needs to be pulled so that the threaded rod 43 slides inside the adjusting groove 45. When the threaded rod 43 slides to the outermost end of the adjusting groove 45, the ball retainer shell 41 can be tilted between the two fixing brackets 44 and then removed from between the two fixing brackets 44. For some individual ball retainer sleeves 42 that are worn, they can be replaced by disassembling the individual ball retainer shells 41 as described above. Compared with the existing method of disassembling the entire ball retainer shell 41 after the ball retainer sleeve 42 is worn, disassembling the ball retainer shells 41 individually can reduce the replacement cost.

[0039] Meanwhile, for some bearing balls 3 with large size differences, the ball retainer 41 can be disassembled and replaced to accommodate larger or smaller bearing balls 3. The fixing bracket 44 can serve as a permanent support point and does not need to be replaced, thus achieving the effect of adapting to bearing balls 3 of different sizes.

[0040] Furthermore, for some bearing balls 3 that may be larger or smaller than the deformable size of the ball retainer 42, for example, if the bearing ball 3 is larger than the deformable size of the ball retainer 42 (i.e., the bearing ball 3 can squeeze the ball retainer 42 to the point where it cannot be squeezed further but still cannot fit), or if the bearing ball 3 is smaller than the deformable size of the ball retainer 42 (i.e., the bearing ball 3 cannot contact the ball retainer 42), this can be addressed by loosening the threaded connection between the nut 46 and the threaded rod 43. At this point, the nut 46 will no longer be tightly fitted against the inner wall of the fixing bracket 44, and thus the ball retainer 4 can be pulled. The movement of the threaded rod 43 within the adjusting groove 45 allows the ball retaining shell 41 to move closer together for some bearing balls 3 smaller than the deformable size of the ball retaining sleeve 42, and to move further apart for some bearing balls 3 larger than the deformable size of the ball retaining sleeve 42. The movable ball retaining shell 41 enables the ball retaining sleeve 42 to accommodate bearing balls 3 larger than its deformable size, and to stably support bearing balls 3 smaller than its deformable size, thus expanding the size range of the bearing balls 3 that the two ball retaining sleeves 42 can accommodate.

[0041] After adjustment, tighten the nut 46 so that it fits tightly against the inner wall of the bracket 44, thereby making the ball retainer 41 fit tightly against the bracket 44 again, ensuring a quick connection between the ball retainer 41 and the bracket 44, and allowing the ball retainer 42 to stably support the bearing balls 3.

[0042] It should be noted that, Figure 8 The two ball retaining sleeves 41 shown are adjusted to be closest to each other, and the distance between the two ball retaining sleeves 42 is the size of the smallest ball to be fitted.

[0043] Further explanation: The support components stabilize the bearing balls 3, similar to the principle of existing ball cages. This is primarily to ensure that every two bearing balls 3 maintain the same spacing between the outer ring 1 and the inner ring 2 of the bearing. This allows the bearing balls 3 to effectively support each other, preventing them from piling up or scattering due to rolling. If the bearing balls 3 pile up or scatter, the outer ring 1 and inner ring 2 will not maintain accurate concentricity, leading to instability. This is the effect of existing cages.

[0044] It should be noted that both ends of the fixing bracket 44 are in contact with the corresponding ball retaining shell 41 to support the ball retaining shell 41.

[0045] like Figure 1 , Figure 2 , Figures 4 to 6 As shown, the ball retainer 41 is provided with a sealing assembly for the gap between the outer ring 1 and the inner ring 2 of the bearing. The sealing assembly includes a fixing rod 51 fixedly connected to the side of each ball retainer 41 away from the ball retainer sleeve 42. Two anti-dislodgement burrs 52 are fixedly connected to the end of each fixing rod 51 away from the ball retainer 41. The side of each anti-dislodgement burr 52 away from the ball retainer 41 is set as a bevel. A sealing ring 53 is attached to both sides of the gap between the outer ring 1 and the inner ring 2 of the bearing. The sealing ring 53 is made of rubber. The outer edge and inner edge of the sealing ring 53 are provided with extension rings to cover the two sides of the outer ring 1 and the inner ring 2 of the bearing, thereby sealing both sides of the outer ring 1 and the inner ring 2 of the bearing. Multiple fixing grooves 54 are arranged in a ring array on both sealing rings 53. Each fixing groove 54 corresponds to the position of the fixing rod 51.

[0046] The sealing ring 53, which seals between the outer ring 1 and the inner ring 2 of the bearing, is inserted into the fixing rod 51 through the fixing groove 54. At this time, the fixing rod 51 and the fixing groove 54 are tightly fitted, i.e., an interference fit, so that the fixing rod 51 and the fixing groove 54 maintain a stable insertion relationship. Because the sealing ring 53 is made of rubber, during the process of the fixing rod 51 being inserted into the fixing groove 54, the anti-disengagement spikes 52 on the fixing rod 51 will squeeze the sealing ring 53, thereby causing the sealing ring 53 to deform. When the fixing rod 51 has completely passed through the fixing groove 54, the anti-disengagement spikes 52 will hook onto the side of the sealing ring 53 away from the outer ring 1 of the bearing. The sealing ring 53 fits into the gap between the outer ring 1 and the inner ring 2 of the bearing. The anti-piercing hook 52 hooks onto the sealing ring 53, ensuring that the sealing ring 53 is stably fitted into the gap between the outer ring 1 and the inner ring 2. This, combined with the extension rings on both sides, allows the sealing ring 53 to effectively seal both sides of the outer ring 1 and the inner ring 2, preventing leakage of lubricating oil in the gap between the outer ring 1 and the inner ring 2. Reducing lubricating oil leakage reduces wear between the bearing balls 3 and the outer and inner rings 1 and 2, thus extending the service life of the outer and inner rings 1 and the bearing balls 3.

[0047] When adjusting or replacing the ball retainer 41 as described above, the operator can pull the sealing ring 53, so that the fixing groove 54 on the sealing ring 53 is pulled hard between the fixing rod 51 and the fixing rod 51, so that the fixing rod 51 is disengaged from the fixing groove 54, and the sealing ring 53 can be removed to adjust or replace the exposed ball retainer 41.

[0048] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A double-seal ring combination sealing structure for a bearing, comprising an outer bearing ring (1), an inner bearing ring (2), and bearing balls (3), wherein the inner surface of the outer bearing ring (1) is provided with a first groove, and the outer surface of the inner bearing ring (2) is provided with a second groove, and the bearing balls (3) roll between the first groove of the outer bearing ring (1) and the second groove of the inner bearing ring (2), characterized in that, A support assembly is provided between the outer ring (1) and the inner ring (2) of the bearing; The support assembly includes multiple sets of ball retaining shells (41) disposed between the outer ring (1) and the inner ring (2) of the bearing. The multiple sets of ball retaining shells (41) are detachably connected, and the inner sidewalls of the two ball retaining shells (41) in each set are fixedly connected with ball retaining sleeves (42). Two ball retainers (41) are provided in each group. The two ball retainers (41) in each group are located on both sides of the corresponding bearing ball (3). The inner wall shape of the ball retainer (42) is adapted to the outer surface shape of the bearing ball (3). The ball retainer (42) is made of elastically deformable metal.

2. The double-seal ring combination sealing structure of the bearing according to claim 1, characterized in that, There is a gap between the outer ring (1) and the inner ring (2) of the bearing. The outer ring (1), the inner ring (2) and the bearing balls (3) are all made of high temperature bearing steel. Lubricating oil is provided in the gap between the outer ring (1) and the inner ring (2). Multiple bearing balls (3) are arranged in a ring array.

3. The double-seal ring combination sealing structure of the bearing according to claim 1, characterized in that, The support assembly also includes threaded rods (43) fixedly connected to both sides of each ball retainer (41). A set of fixing brackets (44) is provided between each pair of adjacent ball retainers (41). There are two fixing brackets (44) in each set. Adjustment grooves (45) are provided on both sides of each fixing bracket (44). A nut (46) is threaded to one end of each threaded rod (43) that passes through the adjustment groove (45).

4. The double-seal ring combination sealing structure of the bearing according to claim 3, characterized in that, The two fixed brackets (44) in each group are fixedly connected by rivets. Each fixed bracket (44) is set in a U-shape. Each threaded rod (43) passes through the corresponding adjustment groove (45) and slides inside the adjustment groove (45).

5. The double-seal ring combination sealing structure of the bearing according to claim 3, characterized in that, The ends of the two fixed frames (44) in each group that are far apart from each other are flush with the ends of the two ball retaining shells (41) in each group that are far apart from each other, and both ends of the fixed frame (44) are in contact with the corresponding ball retaining shell (41).

6. The double-seal ring combination sealing structure of the bearing according to claim 1, characterized in that, A sealing assembly is provided on the ball retainer shell (41). The sealing assembly includes a fixing rod (51) fixedly connected to the side of each ball retainer shell (41) away from the ball retainer sleeve (42). Two anti-splurge punctures (52) are fixedly connected to the end of each fixing rod (51) away from the ball retainer shell (41). A sealing ring (53) is attached to both sides of the gap between the outer ring (1) of the bearing and the inner ring (2) of the bearing. Multiple fixing grooves (54) are opened on both sealing rings (53).

7. The double-seal ring combination sealing structure of the bearing according to claim 6, characterized in that, Each anti-slip spur (52) has a beveled surface on the side away from the ball retainer (41). The sealing ring (53) is made of rubber. Both the outer and inner edges of the sealing ring (53) are provided with extension rings. Each fixing groove (54) corresponds to the position of the fixing rod (51).

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