Double-sealing-ring combined sealing structure of bearing

Abstract

The invention discloses a double-sealing-ring combined sealing structure of a bearing, and relates to the technical field of bearings, the double-sealing-ring combined sealing structure comprises a bearing outer ring, a bearing inner ring and a bearing ball, the inner side surface of the bearing outer ring is provided with a rolling groove I, and the outer side surface of the bearing inner ring is provided with a rolling groove II; bearing balls roll between the first rolling groove of the bearing outer ring and the second rolling groove of the bearing inner ring, a supporting assembly is arranged between the bearing outer ring and the bearing inner ring, and the supporting assembly comprises a plurality of sets 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 in each group are fixedly connected with ball retaining sleeves. By means of the deformable ball retaining sleeve, the bearing balls of different sizes can be matched and attached, compared with an existing mode that ball retaining shells of different sizes are directly replaced, the step that the ball retaining shells suitable for the bearing balls in size can be found only through frequent replacement is omitted, and the stable assembling efficiency of the bearing balls is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of bearings, and more specifically, to a double-seal ring combined sealing structure for bearings. Background Art

[0002] In the bearing assembly process, the structural design and sealing performance of the ball cage directly affect the stability of bearing operation and maintenance costs. Traditional ball cages usually have fixed sizes, and special ball cages need to be customized for different sizes of balls. However, for bearings with different sizes of balls, the entire ball cage must be disassembled and replaced. The rigid ball cage cannot be compatible with different sizes of balls. If a non-matching rigid cage is directly used to hold the balls stably, wear will occur between the balls and the cage. Therefore, users need to frequently assemble to find a ball cage that fits the balls. Moreover, most existing sealing structures adopt an integral design. When the ball cage needs to be repaired due to long-term wear, the entire ball cage needs to be replaced. However, only some parts of the ball cage may be worn. If the entire cage is directly replaced, it will cause waste of resources and increase maintenance costs. Summary of the Invention

[0003] To solve the above technical problems, the present invention provides a double-seal ring combined sealing structure for bearings.

[0004] The technical solution is as follows:

[0005] The double-seal ring combined sealing structure for bearings includes an outer bearing ring, an inner bearing ring, and bearing balls. A first rolling groove is formed on the inner surface of the outer bearing ring, and a second rolling groove is formed on the outer surface of the inner bearing ring. The bearing balls roll between the first rolling groove of the outer bearing ring and the second rolling groove of the inner bearing ring. A support assembly is arranged between the outer bearing ring and the inner bearing ring.

[0006] The support assembly includes multiple groups of ball retaining shells arranged between the outer bearing ring and the inner bearing ring. The inner side walls of the two ball retaining shells in each group are fixedly connected with ball retaining sleeves.

[0007] Further, a gap is left between the outer bearing ring and the inner bearing ring. The outer bearing ring, the inner bearing ring, and the bearing balls are all made of high-temperature bearing steel. Lubricating oil is arranged in the gap between the outer bearing ring and the inner bearing ring. Multiple bearing balls are arranged in an annular array.

[0008] Further, each group of ball retaining shells has two, and the two ball retaining shells in each group are respectively located on both sides of a corresponding bearing ball. The shape of the inner side wall of the ball retaining sleeve is adapted to the outer surface shape of the bearing ball. The ball retaining sleeve is made of an elastically deformable metal.

[0009] Furthermore, the support assembly further includes threaded rods fixedly connected to both sides of each ball retaining shell. A set of fixing brackets is provided between every two adjacent sets of ball retaining shells. Each set of fixing brackets has two members. Adjustment slots are formed on both sides of each fixing bracket. One end of each threaded rod passing through the adjustment slot is threadedly connected with a nut.

[0010] Furthermore, the two fixing brackets in each set are fixedly connected by rivets. Each fixing bracket is in a U shape. Each threaded rod passes through the corresponding adjustment slot, and the threaded rod slides inside the adjustment slot.

[0011] Furthermore, the ends of the two fixing brackets in each set that are away from each other are flush with the ends of the two ball retaining shells in each set that are away from each other, and both ends of the fixing bracket are in close contact with the corresponding ball retaining shell.

[0012] Furthermore, a sealing assembly is provided on the ball retaining shell. The sealing assembly includes fixing rods fixedly connected to the side of each ball retaining shell away from the ball retaining sleeve. Two anti - detachment spikes are fixedly connected to one end of each fixing rod away from the ball retaining shell. One sealing ring is attached to both sides of the gap between the outer ring of the bearing and the inner ring of the bearing. A plurality of fixing slots are formed on both sealing rings.

[0013] Furthermore, the surface of each anti - detachment spike away from the ball retaining shell is a slope. The sealing ring is made of rubber. Extension rings are provided on both the outer edge and the inner edge of the sealing ring. Each fixing slot 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 present invention are as follows:

[0015] Through the deformable ball retaining sleeve, it is possible to adapt and fit bearing balls of different sizes. Compared with the existing method of directly replacing ball retaining shells of different sizes, the steps of frequently replacing to find a suitable ball retaining shell for the bearing balls are reduced, and the efficiency of stable assembly of bearing balls 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 after the ball retaining sleeve is worn, resource waste can be avoided, and the cost of replacement can be reduced by disassembling a single ball retaining shell;

[0017] Through the movable ball retaining shell, the ball retaining sleeve can accommodate bearing balls larger than its deformation amount and can stably support bearing balls smaller than its deformation amount, expanding the size range of the two ball retaining sleeves for adapting bearing balls;

[0018] The sealing ring is used in conjunction with the extension rings on both sides of the sealing ring to seal the outer ring and the inner ring of the bearing on both sides to prevent the leakage of lubricating oil in the gap between the outer ring and the inner ring of the bearing. Reducing the leakage of lubricating oil can reduce the wear of the bearing balls during the rolling process between the outer ring and the inner ring of the bearing, and increase the service life of the outer ring, the inner ring and the bearing balls. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional schematic diagram of the overall components of the present invention;

[0020] Figure 2 It is a three-dimensional schematic diagram of the components of the present invention, such as the ball retaining shell, the ball retaining sleeve, and the bearing balls;

[0021] Figure 3 This is a three-dimensional schematic diagram of the bearing outer ring, bearing inner ring, ball retaining housing and other components of the present invention;

[0022] Figure 4 It is a schematic sectional perspective view of the bearing outer ring, bearing inner ring, bearing balls and other components of the present invention;

[0023] Figure 5 It is a three-dimensional schematic diagram of the fixing rod, sealing ring, fixing groove and other components of the present invention;

[0024] Figure 6 This is a three-dimensional schematic diagram of the fixing rod, anti-stripping and other components of the present invention;

[0025] Figure 7 It is a schematic sectional perspective view of the overall components of the present invention;

[0026] Figure 8 This is a three-dimensional schematic diagram of the arrangement of components such as the ball retaining shell, ball retaining sleeve, and fixing frame of the present invention.

[0027] Wherein, the accompanying drawings in the present invention are:

[0028] 1. Bearing outer ring; 2. Bearing inner ring; 3. Bearing ball;

[0029] Support assembly: 41, ball retaining shell; 42, ball retaining sleeve; 43, threaded rod; 44, fixing bracket; 45, adjustment slot; 46, nut

[0030] Sealing assembly: 51, fixing rod; 52, anti-puncture; 53, sealing ring; 54, fixing groove. DETAILED DESCRIPTION

[0031] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0032] The embodiments provided by the present invention will be elaborated in detail below:

[0033] As Figures 1 to 8 shown, the double-seal ring combined sealing structure of the bearing includes a bearing outer ring 1, a bearing inner ring 2, and bearing balls 3. The diameter of the bearing inner ring 2 is smaller than that of the bearing outer ring 1. There is a gap between the bearing outer ring 1 and the bearing inner ring 2. The bearing outer ring 1, the bearing inner ring 2, and the bearing balls 3 are all made of high-temperature bearing steel to ensure that the bearing outer ring 1, the bearing inner ring 2, and the bearing balls 3 can be used in a high-temperature environment. A first rolling groove is provided on the inner surface of the bearing outer ring 1, and a second rolling groove is provided on the outer surface of the bearing inner ring 2. The bearing balls 3 roll between the first rolling groove of the bearing outer ring 1 and the second rolling groove of the bearing inner ring 2. Lubricating oil is provided in the gap between the bearing outer ring 1 and the bearing inner ring 2. The lubricating oil is used to lubricate the rolling grooves of the bearing balls 3 and reduce wear when the bearing balls 3 roll in the gap between the bearing outer ring 1 and the bearing inner ring 2. A plurality of bearing balls 3 are arranged in an annular array. A support assembly is provided in the gap between the bearing outer ring 1 and the bearing inner ring 2;

[0034] The support assembly includes multiple groups of ball retainer shells 41 provided in the gap between the bearing outer ring 1 and the bearing inner ring 2. Each group of ball retainer shells 41 has two. The two ball retainer shells 41 in each group are respectively located on both sides of a corresponding bearing ball 3. The inner side walls of the two ball retainer shells 41 in each group are fixedly connected with ball retainer sleeves 42. The shape of the inner side wall of the ball retainer sleeve 42 is adapted to the outer surface shape of the bearing ball 3. The ball retainer sleeve 42 can effectively fit the outer surface of the bearing ball 3, so that the bearing ball 3 rolls stably between the first rolling groove of the bearing outer ring 1 and the second rolling groove of the bearing inner ring 2. The ball retainer sleeve 42 is made of an elastically deformable metal to be able to adapt to bearing balls 3 of different sizes.

[0035] Among them, after combining the two ball retaining shells 41 of each group, through the fitting of the ball retaining sleeve 42 and the bearing balls 3, the rolling of the bearing balls 3 in the gap between the bearing outer ring 1 and the bearing inner ring 2 can be stabilized. At the same time, when the ball retaining sleeve 42 is fitted and pressed against the bearing balls 3, the bearing balls 3 can cause the ball retaining sleeve 42 to deform. Through the deformable ball retaining sleeve 42, the fitting of bearing balls 3 of different sizes can be realized. Compared with the existing method of directly replacing the ball retaining shells 41 of different sizes, the steps of frequently replacing the ball retaining shells 41 to find a suitable size for the bearing balls 3 are reduced, and the efficiency of stable assembly of the bearing balls 3 is improved.

[0036] It should be noted that the ball retaining sleeve 42 can deform to adapt to bearing balls 3 of different sizes, but only adapts to a small range of different sizes. For sizes with too large a gap, the ball retaining shell 41 needs to be replaced to adapt to bearing balls 3 of other sizes.

[0037] Such as Figure 2 、 Figure 3 、 Figures 5 to 8 As shown, the support assembly further includes threaded rods 43 fixedly connected to both sides of each ball retaining shell 41. A set of fixing frames 44 are arranged between every two adjacent groups of ball retaining shells 41. Each set of fixing frames 44 has two. The two fixing frames 44 in each set are fixedly connected by rivets. Each fixing frame 44 is arranged in a U shape. Adjustment slots 45 corresponding to the positions of the threaded rods 43 are opened on both sides of each fixing frame 44. Each threaded rod 43 passes through the adjacent adjustment slots 45, and the threaded rod 43 can slide inside the adjustment slots 45. A nut 46 is threadedly connected to one end of each threaded rod 43 passing through the adjustment slot 45.

[0038] It should be noted that the mutually remote ends of the two adjustment slots 45 on the two fixing frames 44 are open, facilitating the threaded rod 43 to slide outwards from the adjustment slots 45, and further facilitating the removal of the ball retaining shell 41 from between the two fixing frames 44.

[0039] Among them, for the bearing balls 3 with a large size gap, if it is necessary to replace the ball retainer housing 41, it can be processed in the following way. By loosening the nut 46 threaded on the threaded rod 43, the nut 46 is detached from the threaded rod 43, and then the two groups of ball retainer housings 41 are removed from the two fixing brackets 44 to both sides respectively. During this process, it is necessary to pull the ball retainer housing 41 so that the threaded rod 43 slides inside the adjustment groove 45. When the threaded rod 43 slides to the outermost end of the adjustment groove 45, at this time, the ball retainer housing 41 is tilted between the two fixing brackets 44, and then the ball retainer housing 41 can be removed from between the two fixing brackets 44. For some single ball retainer sleeves 42 that are worn, they can be replaced by the above method of disassembling the single ball retainer housing 41. Compared with the existing method of disassembling the entire ball retainer housing 41 after the ball retainer sleeve 42 is worn, disassembling the single ball retainer housing 41 can reduce the replacement cost;

[0040] At the same time, for some bearing balls 3 with a large size gap, by disassembling and replacing the ball retainer housing 41, it can further adapt to larger-sized or smaller-sized bearing balls 3. The fixing bracket 44 can be used as a permanent support point without replacement, thereby achieving the effect of adapting to different-sized bearing balls 3.

[0041] In addition, for some bearing balls 3 that may be larger or smaller than the deformable amount of the ball retainer sleeve 42. For example, the bearing ball 3 is larger than the deformable amount of the ball retainer sleeve 42, that is, the bearing ball 3 squeezes the ball retainer sleeve 42 to a state where it cannot be squeezed anymore and still cannot be adapted, or the bearing ball 3 is smaller than the deformable amount of the ball retainer sleeve 42, and the bearing ball 3 cannot contact the ball retainer sleeve 42. In this regard, by adjusting and loosening the threaded connection between the nut 46 and the threaded rod 43, at this time, the nut 46 no longer tightly fits against the inner wall of the fixing bracket 44. Then, at this time, the ball retainer housing 41 can be pulled to move, so that the threaded rod 43 moves inside the adjustment groove 45. For some bearing balls 3 smaller than the deformable amount of the ball retainer sleeve 42, the ball retainer housings 41 can be made to approach each other, and for some bearing balls 3 larger than the deformable amount of the ball retainer sleeve 42, the ball retainer housings 41 can be made to move away from each other. Through the movable ball retainer housing 41, the ball retainer sleeve 42 can accommodate bearing balls 3 larger than its deformable amount and can stably support bearing balls 3 smaller than its deformable amount, expanding the size range of the two ball retainer sleeves 42 that can be adapted to the bearing balls 3.

[0042] After the adjustment is completed, tighten the nut 46 so that the nut 46 tightly fits against the inner wall of the fixing bracket 44. Then, once again, the ball retainer housing 41 tightly fits against the fixing bracket 44, ensuring the quick connection between the ball retainer housing 41 and the fixing bracket 44, and enabling the ball retainer sleeve 42 to stably support the bearing balls 3 stably.

[0043] It should be noted that Figure 8 The two ball retaining shells 41 shown in Figure 8 are adjusted to the closest state, and the distance between the two ball retaining sleeves 42 is the size adapted to the smallest ball.

[0044] Further explanation: The support of the bearing balls 3 by the support assembly is stable, which is the same as the principle of the existing ball retainer. The main purpose is to keep the same spacing between every two bearing balls 3 between the bearing outer ring 1 and the bearing inner ring 2, so that the bearing balls 3 can effectively support between the bearing outer ring 1 and the bearing inner ring 2, and prevent the bearing balls 3 from piling up or scattering due to rolling. If the bearing balls 3 pile up or scatter, the bearing outer ring 1 and the bearing inner ring 2 cannot maintain an accurate concentric state, which will cause instability between the bearing inner ring 2 and the bearing outer ring 1. The above is the effect of the existing retainer.

[0045] It should be noted that both ends of the fixing frame 44 are in contact with the corresponding ball retaining shell 41 to support the ball retaining shell 41.

[0046] As Figure 1 、 Figure 2 、 Figures 4 to 6 shown, a sealing assembly for the gap between the bearing outer ring 1 and the bearing inner ring 2 is provided on the ball retaining shell 41. The sealing assembly includes fixing rods 51 fixedly connected to the side of each ball retaining shell 41 away from the ball retaining sleeve 42. Two anti-detachment thorns 52 are fixedly connected to the end of each fixing rod 51 away from the ball retaining shell 41. The surface of each anti-detachment thorn 52 away from the ball retaining shell 41 is set as an inclined surface. A sealing ring 53 is attached to both sides of the gap between the bearing outer ring 1 and the bearing inner ring 2. The sealing ring 53 is made of rubber. Extension rings are provided on both the outer edge and the inner edge of the sealing ring 53 to cover the two side surfaces of the bearing outer ring 1 and the bearing inner ring 2, so as to seal both sides of the bearing outer ring 1 and the bearing inner ring 2. A plurality of fixing grooves 54 arranged in an annular array are formed on both sealing rings 53, and each fixing groove 54 corresponds to the position of the fixing rod 51.

[0047] The sealing ring 53 that seals between the bearing outer ring 1 and the bearing inner ring 2 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 in close fit, that is, interference fit, so that a stable insertion relationship is maintained between the fixing rod 51 and the fixing groove 54. Since the material of the sealing ring 53 is rubber, during the process of inserting the fixing rod 51 into the fixing groove 54, the anti-detachment thorn 52 on the fixing rod 51 will squeeze the sealing ring 53, and then the sealing ring 53 will deform. When the fixing rod 51 completely passes through the fixing groove 54, at this time, the anti-detachment thorn 52 will hook on the side of the sealing ring 53 away from the bearing outer ring 1. At this time, the sealing ring 53 will be embedded in the gap between the bearing outer ring 1 and the bearing inner ring 2. By hooking the anti-detachment thorn 52 on the sealing ring 53, the sealing ring 53 can be stably embedded in the gap between the bearing outer ring 1 and the bearing inner ring 2, so that the sealing ring 53 cooperates with the extension rings on both sides to effectively seal both sides of the bearing outer ring 1 and the bearing inner ring 2, preventing the lubricating oil in the gap between the bearing outer ring 1 and the bearing inner ring 2 from leaking. Reducing the leakage of lubricating oil can reduce the wear between the bearing balls 3 and the bearing outer ring 1 and the bearing inner ring 2, and improve the service life of the bearing outer ring 1, the bearing inner ring 2 and the bearing balls 3.

[0048] During the adjustment, disassembly and replacement of the ball retaining shell 41 as described above, the staff can pull the sealing ring 53, so that the fixing groove 54 on the sealing ring 53 and the fixing rod 51 are rigidly pulled out, and the fixing rod 51 is disengaged from the insertion relationship with the fixing groove 54, and then the sealing ring 53 can be disassembled, and the exposed ball retaining shell 41 can be adjusted or replaced.

[0049] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. Double-seal-ring combined sealing structure of a bearing, comprising an outer bearing ring (1), an inner bearing ring (2) and bearing balls (3). A first rolling groove is formed on the inner surface of the outer bearing ring (1), and a second rolling groove is formed on the outer surface of the inner bearing ring (2). The bearing balls (3) roll between the first rolling groove of the outer bearing ring (1) and the second rolling groove of the inner bearing ring (2), characterized in that, A support assembly is provided between the bearing outer ring (1) and the bearing inner ring (2); The support assembly includes a plurality of groups of ball retaining shells (41) provided between the bearing outer ring (1) and the bearing inner ring (2). The inner side walls of the two ball retaining shells (41) in each group are fixedly connected with ball retaining sleeves (42).

2. The double-seal ring combined seal structure of the bearing according to claim 1, wherein A gap is left between the bearing outer ring (1) and the bearing inner ring (2). The bearing outer ring (1), the bearing 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 bearing outer ring (1) and the bearing inner ring (2). A plurality of bearing balls (3) are arranged in an annular array.

3. The double-seal-ring combined sealing structure of the bearing according to claim 1, characterized in that, Each group of ball retaining shells (41) has two. The two ball retaining shells (41) in each group are respectively located on both sides of a corresponding bearing ball (3). The shape of the inner side wall of the ball retaining sleeve (42) is adapted to the outer surface shape of the bearing ball (3). The ball retaining sleeve (42) is made of an elastically deformable metal.

4. The double-seal ring combined seal structure of the bearing according to claim 1, characterized in that, The support assembly further includes threaded rods (43) fixedly connected to both sides of each ball retaining shell (41). A group of fixing frames (44) is provided between every two adjacent groups of ball retaining shells (41). Each group of fixing frames (44) has two. Adjusting grooves (45) are opened on both sides of each fixing frame (44). One end of each threaded rod (43) passing through the adjusting groove (45) is threadedly connected with a nut (46).

5. The double-seal-ring combined seal structure of the bearing according to claim 3, wherein, The two fixing frames (44) in each group are fixedly connected by rivets. Each fixing frame (44) is in a U shape. Each threaded rod (43) passes through the corresponding adjusting groove (45), and the threaded rod (43) slides inside the adjusting groove (45).

6. The double-seal ring combined sealing structure of the bearing according to claim 3, characterized in that, One end of each group of two fixing frames (44) away from each other is flush with one end of each group of two ball retaining shells (41) away from each other, and both ends of the fixing frame (44) are in contact with the corresponding ball retaining shell (41).

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

8. The double-seal ring combined seal structure of the bearing according to claim 7, characterized in that, One side of each anti-detachment thorn (52) away from the ball retaining shell (41) is a slope. The sealing ring (53) is made of rubber. Extension rings are provided on both the outer edge and the inner edge of the sealing ring (53). Each fixing groove (54) corresponds to the position of the fixing rod (51).

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