Multi-row self-aligning ball bearing

Abstract

The utility model belongs to the field of bearings, and particularly relates to a multi-row self-aligning ball bearing which comprises a bearing outer ring, a bearing inner ring, a roller group, a first connecting component, a second connecting component and a spring lock ring, the roller group is arranged on an inner raceway of the bearing inner ring; the roller group is assembled between the bearing outer ring and the bearing inner ring; the bearing outer ring comprises a first half outer ring and a second half outer ring. According to the thin-wall self-aligning ball bearing, the requirement for small size can be met, the bearing capacity can be fully improved, and the section thickness of the bearing is fully reduced to meet the matching requirement of a narrow space through the measures of scientifically reducing the diameter of the rolling bodies, reasonably increasing the column number of the rolling bodies and the like; and the bearing limit of the bearing is further improved on the premise of meeting the original bearing capacity of the bearing.

Description

Technical Field

[0001] The utility model relates to a bearing, in particular to a multi-row self-aligning ball bearing. Background Art

[0002] Standard self-aligning ball bearings typically have only two rows of balls. Due to their self-aligning properties, the bearings are unaffected by misalignment of the shaft relative to the bearing housing. They can still operate normally even if the inner ring or rolling elements are tilted relative to the outer ring. With industrial upgrades in the machinery industry, bearing products are rapidly developing towards smaller sizes and higher load capacities. However, due to their structural limitations, standard self-aligning ball bearings cannot fully meet the requirements of applications where installation space is limited, the shaft is misaligned relative to the bearing housing, or heavy loads are present. Utility Model Content

[0003] The purpose of the utility model is to overcome the above-mentioned defects and provide a thin-walled self-aligning ball bearing which can meet the small size requirement and can fully improve the load-bearing capacity.

[0004] The technical solution adopted to achieve the purpose of the utility model is: a multi-row self-aligning ball bearing, including a bearing outer ring, a bearing inner ring, a roller group, a first connecting component, a second connecting component and a spring locking ring; the roller group is placed on the inner raceway of the bearing inner ring; the roller group is assembled between the bearing outer ring and the bearing inner ring; the bearing outer ring includes a first half outer ring and a second half outer ring; the first connecting component is arranged at the butt joint on the outer circumferential surface of the first half outer ring; the second connecting component is arranged at the butt joint on the outer circumferential surface of the second half outer ring; the first connecting component and the second connecting component fasten the first half outer ring and the second half outer ring through the spring locking ring.

[0005] Furthermore, the inner raceway of the bearing inner ring is a peach-shaped raceway.

[0006] Furthermore, the roller set includes two rows of self-aligning balls or four rows of self-aligning balls.

[0007] Furthermore, the first connecting component and the first half outer ring are an integrally formed structure; the second connecting component and the second half outer ring are an integrally formed structure.

[0008] Furthermore, the connecting assembly includes a semicircular groove, a semicircular connecting rod and a semicircular fixing head; the semicircular connecting rod is arranged in the semicircular groove; a semicircular fixing head is provided on the semicircular connecting rod; the diameter of the semicircular groove is greater than the diameter of the semicircular fixing head; the diameter of the semicircular fixing head is greater than the diameter of the semicircular connecting rod.

[0009] Furthermore, the outer surface of the semicircular fixing head of the first connecting component and the semicircular fixing head of the second connecting component after they are connected is not higher than the outer circumferential surface of the first half outer ring and the second half outer ring after they are connected.

[0010] Furthermore, chamfers are respectively provided at the joints between the first half outer ring and the second half outer ring; chamfers are respectively provided at the joints between the semi-annular grooves of the first connecting component and the second connecting component and the two half outer rings; chamfers are respectively provided at the joints between the semicircular fixing head of the first connecting component and the semicircular fixing head of the second connecting component.

[0011] Furthermore, the spring locking ring is sleeved outside the semicircular connecting rod of the first connecting assembly and the semicircular connecting rod of the second connecting assembly.

[0012] Furthermore, at least four pairs of the first connecting components and the second connecting components are arranged on the outer circumferential surfaces of the first half outer ring and the second half outer ring; and every two pairs of the first connecting components and the second connecting components are arranged on the same horizontal line.

[0013] Furthermore, the middle two rows of the four rows of center-aligning balls are the second row of center-aligning balls and the third row of center-aligning balls; the center distance between the first row of center-aligning balls and the second row of center-aligning balls is equal to the center distance between the third row of center-aligning balls and the fourth row of center-aligning balls; the center distance between the second row of center-aligning balls and the third row of center-aligning balls is respectively greater than the center distance between the first and second rows and the center distance between the third and fourth rows.

[0014] The advantages of this utility model in practical application are:

[0015] 1. By scientifically reducing the diameter of the rolling element and then the wall thickness of the ring, the bearing dimensions can be fully compressed to meet the matching needs of narrow spaces;

[0016] 2. Through verification and analysis, the double-row rolling elements of the standard bearing were changed to four-row rolling elements, and the number of rolling elements was rationally allocated to compensate for the loss of load-bearing capacity caused by the reduction of the rolling element diameter, and further improve the bearing load-bearing capacity;

[0017] 3. The inner ring raceway is designed as an independent peach-shaped raceway, which can correct the running posture of the rolling elements. Even if the outer ring has an inclination relative to the inner ring and causes load changes, the rolling elements in each row can still rotate flexibly without affecting each other, fully ensuring the self-aligning performance of the bearing.

[0018] 4. The outer ring is designed as a radially split two-body structure, which can be installed into the bearing from both sides along the axis to meet the installation interference problem between the four-row rolling elements and the outer ring. After the outer ring is assembled, it is tightened by a spring lock ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural diagram of the utility model;

[0020] Figure 2 It is a partial cross-sectional view of the utility model;

[0021] Figure 3 This is a partial cross-sectional view of the second half of the outer ring of the present invention;

[0022] Figure 4 This is a partial cross-sectional view of the first half of the outer ring of the present invention;

[0023] Figure 5 for Figure 4 Schematic diagram of the local structure at location I;

[0024] Figure 6 It is a partial cross-sectional plan view of the utility model;

[0025] In the figure: 1. Bearing inner ring, 2. First half of outer ring, 3. Second half of outer ring, 4. Semi-annular groove, 5. Semi-circular connecting rod, 6. Semi-circular fixing head, 7. Spring locking ring, 8. First row of self-aligning balls, 9. Second row of self-aligning balls, 10. Third row of self-aligning balls, 11. Fourth row of self-aligning balls, 12. First connecting assembly, 13. Second connecting assembly. DETAILED DESCRIPTION

[0026] In order to make the structure and function of the present invention clearer, the technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0027] Referring to the accompanying drawings, a multi-row self-aligning ball bearing includes a bearing outer ring, a bearing inner ring 1, a roller group, a first connecting component 12, a second connecting component 13 and a spring lock ring 7; the roller group is placed on the inner raceway of the bearing inner ring 1; the roller group is assembled between the bearing outer ring and the bearing inner ring 1; the bearing outer ring includes a first half outer ring 2 and a second half outer ring 3; the first connecting component 12 is arranged at the butt joint on the outer circumferential surface of the first half outer ring 2; the second connecting component 13 is arranged at the butt joint on the outer circumferential surface of the second half outer ring 3; the first connecting component 12 and the second connecting component 13 fasten the first half outer ring 2 and the second half outer ring 3 through the spring lock ring 7.

[0028] Furthermore, the inner raceway of the bearing inner ring 1 is a peach-shaped raceway.

[0029] Furthermore, the roller set includes two rows of self-aligning balls or four rows of self-aligning balls.

[0030] Furthermore, the first connecting component 12 and the first half outer ring 2 are an integrally formed structure; the second connecting component 13 and the second half outer ring 3 are an integrally formed structure.

[0031] Furthermore, the connecting assembly includes a semicircular groove 4, a semicircular connecting rod 5 and a semicircular fixing head 6; the semicircular connecting rod 5 is arranged in the semicircular groove 4; a semicircular fixing head 6 is provided on the semicircular connecting rod 5; the diameter of the semicircular groove 4 is greater than the diameter of the semicircular fixing head 6; the diameter of the semicircular fixing head 6 is greater than the diameter of the semicircular connecting rod 5.

[0032] Furthermore, the outer surface of the semicircular fixing head of the first connecting component 12 and the semicircular fixing head of the second connecting component 13 after docking is not higher than the outer circumferential surface of the first half outer ring 2 and the second half outer ring 3 after docking.

[0033] Furthermore, chamfers are respectively provided at the joints between the first half outer ring 2 and the second half outer ring 3; chamfers are respectively provided at the joints between the semi-annular grooves of the first connecting component 12 and the second connecting component 13 and the two half outer rings; chamfers are respectively provided at the joints between the semicircular fixing head of the first connecting component 12 and the semicircular fixing head of the second connecting component 13.

[0034] Furthermore, the spring lock ring 7 is sleeved outside the semicircular connecting rod of the first connecting assembly 12 and the semicircular connecting rod of the second connecting assembly 13 .

[0035] Furthermore, at least four pairs of the first connecting components 12 and the second connecting components 13 are arranged on the outer circumferential surfaces of the first half outer ring 2 and the second half outer ring 3; and every two pairs of the first connecting components 12 and the second connecting components 13 are arranged on the same horizontal line.

[0036] Furthermore, the middle two rows of the four rows of center-aligning balls are the second row of center-aligning balls 9 and the third row of center-aligning balls 10; the center distance between the first row of center-aligning balls 8 and the second row of center-aligning balls 9 is equal to the center distance between the third row of center-aligning balls 10 and the fourth row of center-aligning balls 11; the center distance between the second row of center-aligning balls 9 and the third row of center-aligning balls 10 is greater than the center distance between the first and second rows and the center distance between the third and fourth rows, respectively.

[0037] It should be noted that the utility model relates to a thin-walled, high-load-bearing multi-row self-aligning ball bearing structure, which is mainly used in the mechanical industry with narrow installation space, misalignment of the shaft relative to the bearing box, and heavy load. Based on the design principle of the standard self-aligning ball bearing, this patent optimizes the product structure and develops a thin-walled self-aligning ball bearing that can meet small size requirements and fully improve the load-bearing capacity. By scientifically reducing the diameter of the rolling element and reasonably increasing the number of rolling element rows, the cross-sectional thickness of the bearing is fully reduced to adapt to the matching requirements of a small space, and the load limit of the bearing is further improved while meeting the original load-bearing capacity of the bearing.

[0038] The above examples are merely preferred embodiments of the present invention. Obviously, the present invention is not limited to the above examples and is subject to numerous variations. Any variations that can be directly derived or conceived by a person skilled in the art from the disclosure of the present invention should be considered within the scope of protection of the present invention.

Claims

1. A multi-row self-aligning ball bearing, characterized in that: It includes a bearing outer ring, a bearing inner ring, a roller group, a first connecting component, a second connecting component and a spring locking ring; the roller group is placed on the inner raceway of the bearing inner ring; the roller group is assembled between the bearing outer ring and the bearing inner ring; the bearing outer ring includes a first half outer ring and a second half outer ring; the first connecting component is arranged at the butt joint on the outer circumferential surface of the first half outer ring; the second connecting component is arranged at the butt joint on the outer circumferential surface of the second half outer ring; the first connecting component and the second connecting component fasten the first half outer ring and the second half outer ring through the spring locking ring.

2. The multi-row self-aligning ball bearing according to claim 1, characterized in that: The inner raceway of the bearing inner ring is a peach-shaped raceway.

3. The multi-row self-aligning ball bearing according to claim 1, characterized in that: The roller set includes two rows of self-aligning balls or four rows of self-aligning balls.

4. The multi-row self-aligning ball bearing according to claim 1, characterized in that: The first connecting component and the first half outer ring are an integrated structure; the second connecting component and the second half outer ring are an integrated structure.

5. A multi-row self-aligning ball bearing according to claim 1 or 4, characterized in that: The connecting assembly includes a semicircular groove, a semicircular connecting rod and a semicircular fixing head; the semicircular connecting rod is arranged in the semicircular groove; the semicircular fixing head is provided on the semicircular connecting rod; the diameter of the semicircular groove is greater than the diameter of the semicircular fixing head; the diameter of the semicircular fixing head is greater than the diameter of the semicircular connecting rod.

6. The multi-row self-aligning ball bearing according to claim 5, characterized in that: The outer surface of the semicircular fixing head of the first connecting component and the semicircular fixing head of the second connecting component after they are connected is not higher than the outer circumferential surface of the first half outer ring and the second half outer ring after they are connected.

7. The multi-row self-aligning ball bearing according to claim 5, characterized in that: The joints between the first half outer ring and the second half outer ring are respectively provided with chamfers; the joints between the semi-annular grooves of the first connecting component and the second connecting component and the two half outer rings are respectively provided with chamfers; the joints between the semicircular fixing head of the first connecting component and the semicircular fixing head of the second connecting component are respectively provided with chamfers.

8. A multi-row self-aligning ball bearing according to claim 6 or 7, characterized in that: The spring lock ring is sleeved outside the semicircular connecting rod of the first connecting assembly and the semicircular connecting rod of the second connecting assembly.

9. The multi-row self-aligning ball bearing according to claim 1, characterized in that: There are at least four pairs of the first connecting components and the second connecting components arranged on the outer circumferential surfaces of the first and second half outer rings; and every two pairs of the first connecting components and the second connecting components are arranged on the same horizontal line.

10. The multi-row self-aligning ball bearing according to claim 3, characterized in that: The middle two rows of the four rows of center-aligning balls are the second row of center-aligning balls and the third row of center-aligning balls; the center distance between the first row of center-aligning balls and the second row of center-aligning balls is equal to the center distance between the third row of center-aligning balls and the fourth row of center-aligning balls; the center distance between the second row of center-aligning balls and the third row of center-aligning balls is respectively greater than the center distance between the first and second rows and the center distance between the third and fourth rows.

Images