Double-row angular contact ball bearing with double inner rings

Abstract

The application relates to the technical field of bearings, in particular to a double-inner-ring double-row angular contact ball bearing which comprises an outer ring, two inner rings are arranged on the inner side of the outer ring, a retainer is arranged between the inner rings and the outer ring, a plurality of rolling balls in annular array arrangement are slidably embedded on the surface of the retainer, the surface of the rolling balls is in contact with the inner wall of the outer ring and the outer surface of the inner rings, and a sealing ring is slidably embedded on the face of each of the two inner rings away from each other. In the using process, the bearing is convenient to assemble, the two retainers and the sealing ring form a relatively integrated structure, the structural strength is effectively improved, compared with a traditional double-row angular contact ball bearing, the axial bearing capacity of the bearing is remarkably improved, the load borne by a single rolling body and a raceway is reduced, the risk of fatigue failure is reduced, meanwhile, the design enhances the capacity of the bearing to simultaneously bear axial load and radial load, and solves the problem that the traditional double-row angular contact ball bearing is difficult to apply under complex working conditions.

Description

Technical Field

[0001] The present invention relates to the technical field of bearings, and in particular to a double-inner-ring double-row angular contact ball bearing. Background Art

[0002] Bearings are a vital, fundamental component in modern machinery. Double-row angular contact ball bearings are typically designed in a back-to-back or face-to-face arrangement, resulting in high rigidity and the ability to withstand bidirectional axial loads and a certain amount of tipping torque. This design provides similar performance to two single-row angular contact ball bearings arranged back-to-back, but with a narrower overall width, saving installation space.

[0003] However, due to the small contact angle of double-row angular contact ball bearings in existing technology, their radial and axial load capacity is limited. The seal rings are typically assembled using a plug-in design, which can easily damage the edges during assembly. The assembled structure is relatively independent and has low strength. Furthermore, current double-row angular contact ball bearings are typically designed with only a single inner ring, enabling only unidirectional rotation and failing to meet the requirement for simultaneous bidirectional rotation of the inner ring. Summary of the Invention

[0004] The purpose of the present invention is to solve the shortcomings of the background technology and to propose a double inner ring double row angular contact ball bearing.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a double-inner-ring double-row angular contact ball bearing, comprising an outer ring, two inner rings are arranged on the inner side of the outer ring, a retaining frame is arranged between the inner ring and the outer ring, a plurality of balls arranged in an annular array are slidably embedded on the surface of the retaining frame, the surfaces of the balls are in contact with the inner wall of the outer ring and the outer surface of the inner ring, sealing rings are slidably embedded on the sides of the two inner rings away from each other, limiting grooves are respectively provided on the two side ports of the outer ring, the outer edge of the sealing ring is embedded in the inner side of the limiting groove, an annular groove is provided on the inner wall of the limiting groove, the edge of the sealing ring is connected to the limiting column through a pop-up mechanism, a plurality of rods are slidably passed through the two sealing rings, one end of the rod is fixedly connected to a fixing screw head, the other end of the rod is threadedly sleeved with a locking nut, and the rod slides through the two retaining frames;

[0006] When the locking nut is tightened, the locking nut and the fixing screw head respectively enable the ejection mechanism to push the limiting column to be inserted into the inner side of the annular groove.

[0007] Preferably, a groove is provided on the side surface of the inner ring, and a snap-in portion is provided on the inner edge of the sealing ring, and the snap-in portion slides and snaps into the inner side of the groove.

[0008] Preferably, the inner wall of the outer ring is provided with two first grooves, and the close side of the outer surface of the two inner rings is respectively provided with a second groove, and the ball is clamped between the first groove and the second groove.

[0009] Preferably, the close side of the two side retainers is respectively provided with a plurality of rolling grooves, and the ball is clamped in the inner side of the rolling groove.

[0010] Preferably, the ejection mechanism comprises a socket provided in the inner side of the sealing ring, the socket is provided with an inner sliding port on the side close to the ball, and the socket is provided with an outer sliding port on the side away from the ball, the limiting column is slidably inserted into the inner side of the socket, the two side surfaces of the limiting column are respectively fixedly connected with an inclined block and a sliding plate, the inclined block is slidably clamped into the inner side of the outer sliding port, the sliding plate is slidably clamped into the inner side of the inner sliding port, and the upper surface of the sliding plate is provided with an elastic mechanism.

[0011] Preferably, the elastic mechanism comprises a fixed seat fixedly connected to the end of the inner sliding port away from the sliding plate, and a compression spring fixedly connected between the fixed seat and the sliding plate.

[0012] Preferably, the close side of the fixed screw head and the locking nut is respectively fixedly connected with a limiting disc, the outer surface of the inclined block is provided with a clamping port, and the edge of the limiting disc is clamped into the inner side of the clamping port.

[0013] Preferably, the outer surface of the outer ring is provided with an outer groove.

[0014] Preferably, the outer surface of the retainer is provided with a plurality of limiting holes, and the insertion rod is slidably inserted into the inner side of the limiting hole.

[0015] Compared with the prior art, the present application has the following beneficial effects:

[0016] 1. In the assembly process, after the inner ring, the retainer and the ball are installed, the sealing ring is assembled, the clamping part of one side of the sealing ring is clamped into the groove, the insertion rod is inserted, the insertion rod will push the inclined block, so that the inclined block moves and does not hinder the insertion of the insertion rod, then the insertion rod passes through the limiting holes on the two retainers, then the sealing ring on the other side is sleeved on the surface of the insertion rod, at this time the inclined block on this side needs to be pushed to not interfere with the insertion of the insertion rod, then the locking nut is screwed, after being screwed, the limiting discs on the two sides push the inclined blocks, so that the inclined blocks slide along the inner side of the outer sliding port, the sliding plates slide along the inner side of the inner sliding port, and the compression spring is compressed, at this time the end of the limiting column is inserted into the inner side of the ring groove, achieving the limiting effect, preventing the sealing ring from being separated, then the above insertion step of the insertion rod is repeated, and the insertion rod is positioned at the remaining positions, so that the assembly process does not require cylindrical tools, lubricating oil and other auxiliary tools, the operation is more simple, and the problem of damage to the edge of the sealing ring is less likely to occur.

[0017] 2. The two inner rings can meet the requirement of bidirectional rotation of the inner ring at the same time, effectively improving the application range of the bearing.

[0018] 3. During use, the two retainers and sealing rings form a relatively integrated structure, which effectively improves the structural strength. Compared with traditional double-row angular contact ball bearings, the axial load-bearing capacity of the bearing is significantly improved, the load borne by a single rolling element and raceway is reduced, the risk of fatigue failure is reduced, and the service life of the bearing is extended. At the same time, this design enhances the bearing's ability to withstand axial and radial loads at the same time, solving the problem that traditional double-row angular contact ball bearings are difficult to use under complex working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic structural diagram of a double-inner-ring double-row angular contact ball bearing according to the present invention;

[0020] Figure 2 A cross-sectional view of a double-inner-ring double-row angular contact ball bearing according to the present invention;

[0021] Figure 3 A partial cross-sectional view of a double inner ring double row angular contact ball bearing according to the present invention;

[0022] Figure 4 This is a schematic diagram of a retainer of a double inner ring double row angular contact ball bearing according to the present invention;

[0023] Figure 5 The present invention is a double inner ring double row angular contact ball bearing Figure 4 Enlarged view of point A in the middle;

[0024] Figure 6 This is a cross-sectional view of the ejection mechanism of a double inner ring double row angular contact ball bearing of the present invention;

[0025] Figure 7 The present invention is a double inner ring double row angular contact ball bearing Figure 6 Enlarged view of point B in the middle;

[0026] Figure 8 This is a schematic diagram of the outer ring of a double-inner-ring double-row angular contact ball bearing according to the present invention.

[0027] In the figure: 1. Outer ring; 2. Inner ring; 3. Ball; 4. Cage; 5. First groove; 6. Second groove; 7. Sealing ring; 8. Limiting groove; 9. Groove; 10. Snap-in part; 11. Ring groove; 12. Limiting column; 13. Insertion hole; 14. Inner slide; 15. Fixed seat; 16. Compression spring; 17. Sliding plate; 18. Outer slide; 19. Bevel block; 20. Bayonet; 21. Fixing screw head; 22. Insert rod; 23. Locking nut; 24. Limiting plate; 25. Outer groove; 26. Limiting hole; 27. Rolling groove. DETAILED DESCRIPTION

[0028] The following description is intended to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are merely examples, and those skilled in the art may conceive of other obvious variations.

[0029] like Figures 1-8 A double inner ring double row angular contact ball bearing shown in FIG, comprises an outer ring 1, two inner rings 2 are arranged on the inner side of the outer ring 1, a retaining frame 4 is provided between the inner ring 2 and the outer ring 1, a plurality of balls 3 arranged in an annular array are slidably embedded on the surface of the retaining frame 4, the surfaces of the balls 3 are in contact with the inner wall of the outer ring 1 and the outer surface of the inner ring 2, sealing rings 7 are slidably embedded on the sides of the two inner rings 2 away from each other, limiting grooves 8 are respectively provided on the two side ports of the outer ring 1, the outer edge of the sealing ring 7 is embedded in the inner side of the limiting groove 8, an annular groove 11 is provided on the inner wall of the limiting groove 8, the edge of the sealing ring 7 is connected to the limiting column 12 through a pop-up mechanism, a plurality of insertion rods 22 slide through the two sealing rings 7 together, one end of the insertion rod 22 is fixedly connected to a fixing screw head 21, the other end of the insertion rod 22 is threadedly sleeved with a locking nut 23, and the insertion rod 22 slides through the two retaining frames 4;

[0030] When the locking nut 23 is tightened, the locking nut 23 and the fixing screw head 21 respectively cause the ejection mechanism to push the limiting post 12 to be inserted into the inner side of the annular groove 11 .

[0031] The side surface of the inner ring 2 is provided with a groove 9, and the inner edge of the sealing ring 7 is provided with a snap-in portion 10, which slides into the inner side of the groove 9. This design makes the assembly process between the sealing ring 7 and the inner ring 2 more accurate and convenient.

[0032] Two first grooves 5 are defined on the inner wall of the outer ring 1. Second grooves 6 are defined on the adjacent outer surfaces of the two inner rings 2. The balls 3 fit between the first and second grooves 5, 6. The first and second grooves 5, 6 serve as guides, facilitating assembly of the retainer 4 and the balls 3, ensuring more stable rolling motion of the balls 3 during use.

[0033] The adjacent sides of the two retainers 4 are respectively provided with a plurality of rolling grooves 27, and the balls 3 slide into the inner sides of the rolling grooves 27. The main function of the retainers 4 is to limit the relative position of the balls 3 and prevent the adjacent spacing of the balls 3 from being too small and hindering the rotation.

[0034] The ejection mechanism includes a socket 13 formed on the inner side of the sealing ring 7. An inner sliding opening 14 is formed on the side of the socket 13 closest to the ball bearing 3, and an outer sliding opening 18 is formed on the side of the socket 13 away from the ball bearing 3. A limiting post 12 slides into the inner side of the socket 13. An angled block 19 and a sliding plate 17 are fixedly connected to the two side surfaces of the limiting post 12. The angled block 19 slides into the inner side of the outer sliding opening 18, and the sliding plate 17 slides into the inner side of the inner sliding opening 14. An elastic mechanism is provided on the upper surface of the sliding plate 17. The limiting post 12 snaps into the inner side of the annular groove 11 to limit the position of the sealing ring 7, preventing the outer edge of the sealing ring 7 from disengaging from the groove 9 and improving the stability of the sealing ring 7 assembly.

[0035] The elastic mechanism includes a mounting base 15 fixedly connected to the end of the inner sliding opening 14 away from the sliding plate 17. A compression spring 16 is fixedly connected between the mounting base 15 and the sliding plate 17. The elastic force of the compression spring 16 causes the retaining post 12 to retract inside the insertion hole 13 when the sealing ring 7 is not assembled, without interfering with the sealing ring 7's edge insertion into the retaining groove 8.

[0036] The adjacent surfaces of the fixing screw head 21 and the locking nut 23 are each fixedly connected to a limit plate 24. A notch 20 is formed on the outer surface of the bevel block 19, and the edge of the limit plate 24 engages the inner side of the notch 20. The design of the limit plate 24 makes the contact and pushing process with the bevel block 19 smoother, and the design of the notch 20 makes the limit plate 24 more stable after being engaged, improving assembly stability.

[0037] The outer surface of the outer ring 1 is provided with an outer groove 25. During use, the outer ring 1 can cooperate with the positioning components (such as positioning rings, retaining rings, etc.) on the bearing housing.

[0038] The outer surface of the retainer 4 is provided with a plurality of limiting holes 26, and the insertion rod 22 is slidably inserted into the inner side of the limiting hole 26. This method of insertion and assembly is simple, can help the two retainers 4 synchronize, and improve the operation stability of the two retainers 4.

[0039] During the assembly process, after the inner ring 2, the retaining frame 4 and the ball 3 are installed, the sealing ring 7 is assembled, the snap-in portion 10 of the sealing ring 7 on one side is snapped into the groove 9, and the insertion rod 22 is inserted. The insertion rod 22 will push the bevel block 19, so that the bevel block 19 moves and will not hinder the entry of the insertion rod 22. Then the insertion rod 22 passes through the limiting holes 26 on the two retaining frames 4, and then the sealing ring 7 on the other side is sleeved on the surface of the insertion rod 22. At this time, it is necessary to push the bevel block 19 on this side so as not to interfere with the passage of the insertion rod 22. After that, the locking nut 23 is screwed on. After tightening, the limit plates on both sides are 24 push the bevel block 19 respectively, so that the bevel block 19 slides along the inner side of the outer sliding mouth 18, and the sliding plate 17 slides along the inner side of the inner sliding mouth 14, squeezing the compression spring 16. At this time, the end of the limit column 12 will be inserted into the inner side of the annular groove 11, achieving the limiting effect to prevent the sealing ring 7 from detaching. After that, the above-mentioned insertion steps of the insertion rod 22 are repeated to position the insertion rods 22 at the remaining positions. Therefore, during the entire assembly process, no auxiliary tools such as cylindrical tools and lubricating oil are required for assembly, the operation is simpler, and the edge damage of the sealing ring 7 is less likely to occur.

[0040] Since two inner rings 2 are provided, the requirement of the inner ring 2 to realize bidirectional rotation simultaneously can be met, thereby effectively improving the application range of the bearing.

[0041] During use, the two retainers 4 and the seal ring 7 form a relatively integrated structure, effectively improving structural strength. Compared with traditional double-row angular contact ball bearings, this design significantly increases the bearing's axial load capacity, reduces the load borne by individual rolling elements and raceways, reduces the risk of fatigue failure, and extends the bearing's service life. At the same time, this design enhances the bearing's ability to withstand both axial and radial loads, resolving the difficulty of using traditional double-row angular contact ball bearings in complex operating conditions.

Claims

1. A double inner ring double row angular contact ball bearing, comprising an outer ring (1), characterized in that: Two inner rings (2) are provided on the inner side of the outer ring (1), a retaining frame (4) is provided between the inner ring (2) and the outer ring (1), a plurality of balls (3) arranged in an annular array are slidably embedded on the surface of the retaining frame (4), the surfaces of the balls (3) are in contact with the inner wall of the outer ring (1) and the outer surface of the inner ring (2), a sealing ring (7) is slidably embedded on the sides of the two inner rings (2) away from each other, and a limiting groove (8) is provided on the two side ports of the outer ring (1), the outer edge of the sealing ring (7) is embedded in the inner side of the limiting groove (8), and an annular groove (11) is provided on the inner wall of the limiting groove (8), and the edge of the sealing ring (7) is connected to the limiting column (12) through a pop-up mechanism, and a plurality of insert rods (22) slide through the two sealing rings (7) together, one end of the insert rod (22) is fixedly connected to a fixing screw head (21), and the other end of the insert rod (22) is threadedly provided with a locking nut (23), and the insert rod (22) slides through the two retaining frames (4); When the locking nut (23) is tightened, the locking nut (23) and the fixing screw head (21) respectively cause the ejection mechanism to push the limiting column (12) to be inserted into the inner side of the annular groove (11); The pop-up mechanism includes a socket (13) provided on the inner side of the sealing ring (7), an inner sliding opening (14) provided on the side of the socket (13) close to the ball (3), and an outer sliding opening (18) provided on the side of the socket (13) away from the ball (3), the limiting column (12) is slidably inserted into the inner side of the socket (13), and the two side surfaces of the limiting column (12) are respectively fixedly connected with an angled block (19) and a sliding plate (17), the angled block (19) slides into the inner side of the outer sliding opening (18), and the sliding plate (17) slides into the inner side of the inner sliding opening (14), and the upper surface of the sliding plate (17) is provided with an elastic mechanism; The elastic mechanism comprises a fixed seat (15) fixedly connected to one end of the inner sliding opening (14) away from the sliding plate (17), and a compression spring (16) is fixedly connected between the fixed seat (15) and the sliding plate (17); The fixing screw head (21) and the locking nut (23) are respectively fixedly connected to the limiting disk (24) on their adjacent sides. The outer surface of the bevel block (19) is provided with a bayonet (20), and the edge of the limiting disk (24) is snapped into the inner side of the bayonet (20).

2. The double inner ring double row angular contact ball bearing according to claim 1, characterized in that: A groove (9) is provided on the side surface of the inner ring (2), and a snap-in portion (10) is provided on the inner edge of the sealing ring (7), and the snap-in portion (10) is slidably snapped into the inner side of the groove (9).

3. The double inner ring double row angular contact ball bearing according to claim 1, characterized in that: Two first grooves (5) are provided on the inner wall of the outer ring (1), and second grooves (6) are provided on adjacent sides of the outer surfaces of the two inner rings (2), and the balls (3) are inserted between the first grooves (5) and the second grooves (6).

4. The double inner ring double row angular contact ball bearing according to claim 1, characterized in that: A plurality of rolling grooves (27) are respectively provided on the adjacent sides of the retaining frames (4) on both sides, and the balls (3) are slidably engaged with the inner sides of the rolling grooves (27).

5. The double inner ring double row angular contact ball bearing according to claim 1, characterized in that: An outer groove (25) is provided on the outer surface of the outer ring (1).

6. The double inner ring double row angular contact ball bearing according to claim 1, characterized in that: A plurality of limiting holes (26) are formed through the outer surface of the retaining frame (4), and the insertion rod (22) is slidably inserted into the inner side of the limiting hole (26).

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