Double-inner-ring double-row angular contact ball bearing

Abstract

The invention 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, and a plurality of balls distributed in an annular array are slidably embedded in the surface of the retainer. According to the double-row angular contact ball bearing, in the using process, assembling is convenient and fast, due to the fact that the two retainers and the sealing rings form a relatively-integrated structure, the structural strength is effectively improved, and compared with a traditional double-row angular contact ball bearing, the double-row angular contact ball bearing has the advantages that the service life of the double-row angular contact ball bearing is prolonged, and the service life of the double-row angular contact ball bearing is prolonged. The axial bearing capacity of the bearing is remarkably improved, the load borne by a single rolling body and a single raceway is reduced, the risk of fatigue failure is reduced, meanwhile, the capacity of the bearing for bearing the axial load and the radial load at the same time is enhanced through the design, and the problem that a traditional double-row angular contact ball bearing is difficult to apply under the complex working condition is solved.

Description

Technical Field

[0001] The 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 an important basic component in modern mechanical equipment. In terms of design, double-row angular contact ball bearings are usually arranged back-to-back or face-to-face, which makes them have high rigidity and can withstand bidirectional axial loads and a certain tipping moment. This design makes its use effect similar to that of two single-row angular contact ball bearings arranged back-to-back, but the overall width is narrower, thus saving installation space.

[0003] However, in the prior art, due to the small contact angle of the double-row angular contact ball bearing, its radial and axial load-bearing capacity is subject to certain limitations. For the sealing ring, it is usually assembled in a plug-in manner, which is prone to edge damage during assembly, and the structure is relatively independent after assembly, and the strength is low. In addition, the current double-row angular contact ball bearing is usually designed with only a single inner ring structure, which can only achieve single-direction rotation and cannot meet the requirement of the inner ring achieving bidirectional rotation at the same time. Summary of the invention

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

[0005] To achieve the above purpose, the technical solution adopted by the present invention is: a double inner ring double row angular contact ball bearing, including an outer ring, two inner rings are arranged on the inner side of the outer ring, a retainer 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 retainer, the surface of the balls contacts 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 plug rods are slidably passed through the two sealing rings, one end of the plug rod is fixedly connected with a fixing screw head, the other end of the plug rod is threadedly sleeved with a locking nut, and the plug rod slides through the two retainers;

[0006] When the locking nut is tightened, the locking nut and the fixing screw head respectively enable the elastic 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, two first grooves are provided on the inner wall of the outer ring, and second grooves are provided on adjacent sides of the outer surfaces of the two inner rings, respectively, and the ball bearings are inserted between the first grooves and the second grooves.

[0009] Preferably, a plurality of rolling grooves are respectively formed on the adjacent sides of the retaining frames at both sides, and the balls are slidably inserted into the inner sides of the rolling grooves.

[0010] Preferably, the pop-up mechanism includes a socket opened on the inner side of the sealing ring, an inner sliding opening is opened on the side of the socket close to the ball, and an outer sliding opening is opened on the side of the socket away from the ball, the limit column is slidably inserted into the inner side of the socket, and the two side surfaces of the limit column are respectively fixedly connected with a bevel block and a sliding plate, the bevel block slides into the inner side of the outer sliding opening, the sliding plate slides into the inner side of the inner sliding opening, and an elastic mechanism is provided on the upper surface of the sliding plate.

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

[0012] Preferably, the fixing screw head and the locking nut are respectively fixedly connected to a limiting disk on one side thereof, and a bayonet is provided on the outer surface of the bevel block, and the edge of the limiting disk is inserted into the inner side of the bayonet.

[0013] Preferably, an outer groove is formed on the outer surface of the outer ring.

[0014] Preferably, a plurality of limiting holes are formed through the outer surface of the retaining frame, and the insertion rod is slidably inserted into the inner side of the limiting hole.

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

[0016] 1. During the assembly process, after the inner ring, retainer and ball are installed, the sealing ring is assembled, the snap-in portion of the sealing ring on one side is snapped into the groove, and the plunger is inserted. The plunger will push the bevel block so that the bevel block moves and will not hinder the entry of the plunger. Then the plunger passes through the limiting holes on the two retainers, and then the sealing ring on the other side is sleeved on the surface of the plunger. At this time, it is necessary to push the bevel block on this side so as not to interfere with the passage of the plunger. After that, screw on the locking nut. After tightening, the limiting plates on both sides push the bevel block respectively, so that the bevel block slides along the inner side of the outer sliding mouth, and the sliding plate slides along the inner side of the inner sliding mouth to squeeze the compression spring. At this time, the end of the limiting column will be inserted into the inner side of the ring groove to achieve the limiting effect and prevent the sealing ring from detaching. After that, repeat the above-mentioned insertion steps of the plunger to position the plungers 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 is not easy to occur.

[0017] 2. Since two inner rings are provided, the requirement of bidirectional rotation of the inner rings can be met, which effectively improves the application range of the bearing.

[0018] 3. During use, the two retaining frames 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 ability of the bearing to withstand axial loads 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 It is a structural schematic diagram of a double inner ring double row angular contact ball bearing of the present invention;

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

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

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

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

[0024] Figure 6 It 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 A double inner ring double row angular contact ball bearing according to the present invention Figure 6 Enlarged view of point B in the middle;

[0026] Figure 8 The figure is a schematic diagram of the outer ring of a double inner ring double row angular contact ball bearing of the present invention.

[0027] In the figure: 1. outer ring; 2. inner ring; 3. ball; 4. retaining frame; 5. first groove; 6. second groove; 7. sealing ring; 8. limiting groove; 9. groove; 10. snap-in portion; 11. ring groove; 12. limiting column; 13. insertion hole; 14. inner slide; 15. fixing seat; 16. compression spring; 17. sliding plate; 18. outer slide; 19. bevel block; 20. bayonet; 21. fixing screw head; 22. insertion rod; 23. locking nut; 24. limiting plate; 25. outer groove; 26. limiting hole; 27. rolling groove. DETAILED DESCRIPTION

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

[0029] like Figure 1-Figure 8 A double inner ring double row angular contact ball bearing shown in the figure 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 arranged 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 surface of the balls 3 contacts 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 that are away from each other, limiting grooves 8 are respectively provided at 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 insert rods 22 are slidably passed between the two sealing rings 7, one end of the insert rod 22 is fixedly connected to a fixing screw head 21, the other end of the insert rod 22 is threadedly sleeved with a locking nut 23, and the insert 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 enable the elastic mechanism to push the limiting column 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 formed on the inner wall of the outer ring 1, and second grooves 6 are formed on the 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. The first grooves 5 and the second grooves 6 play a guiding role, which can assist the assembly of the cage 4 and the balls 3, and make the rolling of the balls 3 more stable during use.

[0033] The sides of the two side 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 to prevent the problem of the adjacent spacing of the balls 3 being too small during rolling and hindering the rotation.

[0034] The pop-up mechanism includes a socket 13 provided on the inner side of the sealing ring 7, an inner sliding opening 14 is provided on the side of the socket 13 close to the ball 3, an outer sliding opening 18 is provided on the side of the socket 13 away from the ball 3, a limiting column 12 is slidably inserted into the inner side of the socket 13, and a bevel block 19 and a sliding plate 17 are fixedly connected to the two side surfaces of the limiting column 12, the bevel block 19 is slidably inserted into the inner side of the outer sliding opening 18, and the sliding plate 17 is slidably inserted into the inner side of the inner sliding opening 14, and an elastic mechanism is provided on the upper surface of the sliding plate 17. The limiting column 12 is inserted into the inner side of the annular groove 11 to limit the position of the sealing ring 7, prevent the outer edge of the sealing ring 7 from being separated from the groove 9, and improve the assembly stability of the sealing ring 7.

[0035] The elastic mechanism includes a fixing seat 15 fixedly connected to the end of the inner sliding opening 14 away from the sliding plate 17, and a compression spring 16 is fixedly connected between the fixing seat 15 and the sliding plate 17. Through the elastic force of the compression spring 16, when the sealing ring 7 is not assembled, the limiting column 12 will be stored inside the insertion hole 13, and will not interfere with the edge of the sealing ring 7 being embedded in the limiting groove 8.

[0036] 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 inserted into the inner side of the bayonet 20. The design of the limiting disk 24 makes the process of contacting and pushing with the bevel block 19 smoother, and the design of the bayonet 20 makes the limiting disk 24 more stable after being inserted, thereby improving the 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] A plurality of limiting holes 26 are formed through the outer surface of the retainer 4, and the insertion rod 22 is slidably inserted into the inner side of the limiting hole 26. This method is simple to insert and assemble, and can help the two retainers 4 to synchronize and improve the running 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 limiting plates on both sides 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 to achieve the limiting effect and prevent the sealing ring 7 from detaching. After that, the above-mentioned insertion steps of the plug rod 22 are repeated to position the plug rods 22 at the remaining positions. Therefore, during the entire assembly process, there is no need for auxiliary tools such as cylindrical tools and lubricating oil for assembly, the operation is simpler, and it is not easy to cause the edge of the sealing ring 7 to be damaged.

[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 sealing ring 7 form a relatively integrated structure, which effectively improves the structural strength. Compared with the 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 ability of the bearing to withstand axial loads 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.

[0042] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

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 arranged on the inner side of the outer ring (1), a retaining frame (4) is arranged 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 surface of the balls (3) contacts 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 at 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), the inner wall of the limiting groove (8) is provided with an annular groove (11), 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) are slidably passed between the two sealing rings (7), 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); When the locking nut (23) is tightened, the locking nut (23) and the fixing screw head (21) respectively cause the elastic mechanism to push the limiting column (12) to be inserted into the inner side of the annular groove (11).

2. A 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), wherein the snap-in portion (10) is slidably snap-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), respectively, 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 formed on the adjacent sides of the retaining frames (4) at both sides, and the balls (3) are slidably inserted into 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: The ejection mechanism comprises a socket (13) provided on the inner side of the sealing ring (7), an inner sliding opening (14) being provided on a side of the socket (13) close to the ball (3), and an outer sliding opening (18) being provided on a side of the socket (13) away from the ball (3), the limiting column (12) being slidably inserted into the inner side of the socket (13), and the two side surfaces of the limiting column (12) being fixedly connected with an angled block (19) and a sliding plate (17), respectively, the angled block (19) being slidably inserted into the inner side of the outer sliding opening (18), and the sliding plate (17) being slidably inserted into the inner side of the inner sliding opening (14), and the upper surface of the sliding plate (17) being provided with an elastic mechanism.

6. The double inner ring double row angular contact ball bearing according to claim 5, characterized in that: The elastic mechanism comprises a fixing seat (15) fixedly connected to an end of the inner sliding opening (14) away from the sliding plate (17), and a compression spring (16) is fixedly connected between the fixing seat (15) and the sliding plate (17).

7. The double inner ring double row angular contact ball bearing according to claim 5, characterized in that: The fixing screw head (21) and the locking nut (23) are respectively fixedly connected to the limiting disk (24) on their adjacent surfaces. 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).

8. 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).

9. 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).

Images