Double-row self-aligning ball bearing
By setting up an interlaced pocket structure and a detachable frame structure on the cage of the double-row self-aligning ball bearing, the problems of excessive bearing axial length and vulnerability of the steel ball in the prior art are solved, and smaller bearing size and lower failure risk are achieved.
Patent Information
- Application Number
- CN202422020145.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-19
- Publication Date
- 2025-05-02
- Estimated Expiration
- 2034-08-19
AI Technical Summary
The inner and outer rings of existing double-row self-aligning ball bearings need to accommodate two rows of balls and cages, resulting in a long axial length, which is unfavorable to adapt to the working conditions of insufficient axial space. At the same time, the steel balls are easily scratched when assembling the metal cage, which increases the risk of early failure of the bearing.
A double-row self-aligning ball bearing is designed. Two rows of pockets are provided on the cage, and the steel balls are respectively arranged in the pockets. The two rows of pockets are intertwined, and the hole walls of one row of pockets are embedded between the pockets of the other rows, forming an equidistant pocket structure, reducing the axial length of the bearing, and through the detachable upper, middle and lower shelf structures and snap groove design, the locking opening is avoided and the risk of steel ball scratches is reduced.
Through the interlaced pocket structure, the axial length of the bearing is effectively shortened, adapted to the working conditions of insufficient axial space, and it is not easy to scratch the steel ball during assembly, reducing the risk of early failure of the bearing.
Smart Images
Figure CN222823564U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a bearing, more specifically to a double-row self-aligning ball bearing. Background Art
[0002] In a double-row self-aligning ball bearing, since there are two rows of balls arranged side by side and a cage between the two rows of balls, in order to accommodate the two rows of balls and the cage, the inner ring and the outer ring of the bearing have a longer axial length inside, which is often disadvantageous for working conditions with insufficient axial space. At the same time, the existing cage is a one-piece metal cage with a locking mouth, which has the risk of scratching the steel balls during assembly, increasing the risk of premature failure of the bearing. Utility Model Content
[0003] In view of the shortcomings of the prior art, the utility model aims to provide a double-row self-aligning ball bearing which has a smaller axial length and is not prone to scratching the steel balls during assembly.
[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a double-row self-aligning ball bearing, comprising an inner ring, an outer ring, a retaining frame and double-row steel balls between the inner ring and the outer ring, the retaining frame being provided with two rows of pockets, the double-row steel balls being respectively arranged in the two rows of pockets in a one-to-one correspondence, the two rows of pockets being arranged alternately, and the hole walls of one row of pockets being embedded between two adjacent pockets in another row, so that the spacing between the hole walls of each pocket in the two rows is equal.
[0005] As a further improvement of the utility model, the retaining frame includes an upper frame, a middle frame and a lower frame, and the upper frame, the middle frame and the lower frame are coaxially detachably connected to each other. The lower end of the upper frame is provided with a plurality of upper pocket holes, the upper end of the middle frame is provided with upper side pocket holes whose positions correspond one-to-one to the upper pocket holes, the upper end of the lower frame is provided with lower pocket holes whose positions are staggered with the upper pocket holes, and the lower end of the middle frame is provided with lower side pocket holes whose positions correspond one-to-one to the lower pocket holes. The upper pocket holes are spliced with the upper side pocket holes, and the lower pocket holes are spliced with the lower side pocket holes to form a staggered two rows of pocket hole structures.
[0006] As a further improvement of the present invention, an upper buckle groove is provided at the lower end of the upper frame at a position relative to the position between the two upper pocket holes, a lower buckle groove is provided at the upper end of the lower frame at a position relative to the position between the two lower pocket holes, an upper clip is provided at the upper end of the middle frame at a position relative to the two upper side pocket holes, and a lower clip is provided at the lower end of the middle frame at a position relative to the two lower side pocket holes. The upper clip is buckled with the upper buckle groove in a one-to-one correspondence to fix the lower end of the upper frame to the upper end of the middle frame, and the lower clip is buckled with the lower buckle groove in a one-to-one correspondence to fix the upper end of the lower frame to the lower end of the middle frame.
[0007] As a further improvement of the utility model, the slots of the upper buckle groove and the lower buckle groove are both provided with a clamping edge, and the upper buckle and the lower buckle are both composed of a clamping plate and a hook, and the hook is in the shape of a right-angled prism. When the upper buckle is buckled with the upper buckle groove, and the lower buckle is buckled with the lower buckle groove, the clamping plate is inserted into the upper buckle groove and the lower buckle groove, and the hook hooks the clamping edge, and the right-angle side of the hook is against the clamping edge.
[0008] The beneficial effect of the utility model is that, through the arrangement of two rows of pocket holes, a limited space can be effectively provided for the two rows of steel balls, and further, by staggering the two rows of pocket holes, the gaps between the pocket holes can be used to accommodate the pocket holes of another row. Compared with the side-by-side arrangement in the prior art, this effectively shortens the axial length of the self-aligning bearing and can better adapt to working conditions with insufficient axial space. BRIEF DESCRIPTION OF THE DRAWINGS
[0009] Figure 1 It is an exploded schematic diagram of the cage of the double-row self-aligning ball bearing of the utility model;
[0010] Figure 2 It is a schematic diagram of the assembled retainer of the double-row self-aligning ball bearing of the utility model. DETAILED DESCRIPTION
[0011] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings.
[0012] Reference Figures 1 to 2 As shown, a double-row self-aligning ball bearing of the present embodiment comprises an inner ring, an outer ring, a retaining frame and double-row steel balls between the inner ring and the outer ring, the retaining frame being provided with two rows of pockets 1, the double-row steel balls being respectively arranged in the two rows of pockets 1 in a one-to-one correspondence, the two rows of pockets 1 being arranged alternately, and the hole walls of one row of pockets 1 being embedded between two adjacent pockets 1 in another row, so that the spacing between the hole walls of each pocket 1 in the two rows is equal, and the arrangement of the two rows of pockets 1 of the retaining frame can simply and effectively provide for the placement of the double-row steel balls, and further, by staggering the two rows of pockets 1, the space between the two pockets 1 can be effectively utilized to shorten the axial length of the entire bearing, thereby achieving better adaptation to the working condition of insufficient axial space.
[0013] As an improved specific embodiment, the retaining frame includes an upper frame 2, a middle frame 3 and a lower frame 4, and the upper frame 2, the middle frame 3 and the lower frame 4 are coaxially detachably connected to each other, and the lower end of the upper frame 2 is provided with a plurality of upper half pocket holes 11, and the upper end of the middle frame 3 is provided with a number of upper side pocket holes 12 corresponding to the upper half pocket holes 11, and the upper end of the lower frame 4 is provided with a lower half pocket hole 14 whose position is staggered with the upper half pocket hole 11, and the lower end of the middle frame 3 is provided with a number of lower side pocket holes 1 corresponding to the lower half pocket hole 14. 3. The upper pocket hole 11 is spliced with the upper side pocket hole 12, and the lower pocket hole 14 is spliced with the lower side pocket hole 13 to form two rows of pocket holes 1 structures that are staggered with each other. Through the arrangement of the upper frame 2, the middle frame 3 and the lower frame 4, a detachable retaining frame structure can be formed, and through the arrangement of the upper pocket hole 11 and the upper side pocket hole 12, an upper row of pocket holes 1 structure can be effectively formed, and through the arrangement of the lower pocket hole 14 and the lower side pocket hole 13, a lower row of pocket holes 1 structure can be effectively formed, and the arrangement of the retaining frame is greatly facilitated.
[0014] As an improved specific implementation method, an upper buckle groove 21 is provided at the lower end of the upper frame 2 relative to the position between the two upper half pocket holes 11, and a lower buckle groove is provided at the upper end of the lower frame 4 relative to the position between the two lower half pocket holes 14. An upper clip 31 is provided at the upper end of the middle frame 3 relative to the position of the two upper side pocket holes 12, and a lower clip is provided at the lower end of the middle frame 3 relative to the position of the two lower side pocket holes 13. The upper clip 31 is buckled with the upper buckle groove 21 in a one-to-one correspondence to fix the lower end of the upper frame 2 to the upper end of the middle frame 3, and the lower clip is buckled with the lower buckle groove in a one-to-one correspondence to fix the upper end of the lower frame 4 to the lower end of the middle frame 3. Through the arrangement of the upper clip 31, the lower clip, the upper buckle groove 21 and the lower buckle groove, the detachable connection between the upper frame 2 and the middle frame 3 and the lower frame 4 can be simply and effectively realized, and compared with the retaining frame structure in the prior art, no lock is provided on it, and it is not easy to scratch the steel ball during assembly compared with the method in the prior art.
[0015] As an improved specific implementation method, the grooves of the upper buckle groove 21 and the lower buckle groove are both provided with a clamping edge 5, and the upper buckle 31 and the lower buckle are both composed of a clamping plate 311 and a hook 312, and the hook 312 is in the shape of a right-angled prism. When the upper buckle 31 is buckled with the upper buckle groove 21, and the lower buckle is buckled with the lower buckle groove, the clamping plate 311 is inserted into the upper buckle groove 21 and the lower buckle groove, and the hook 312 hooks the clamping edge 5, and the right-angled side of the hook 312 is against the clamping edge 5. Through the arrangement of the clamping edge 5 and the hook 312, the right-angled side of the hook 312 can be effectively used to abut the clamping edge 5 to realize the buckling of the upper buckle 31 and the upper buckle groove 21, and the buckling of the lower buckle and the lower buckle groove. The overall structure is simple and effective. The shape structure of the lower buckle and the lower buckle groove in this embodiment is the same as that of the upper buckle 31 and the upper buckle groove 21, and therefore is no longer shown in the figure.
[0016] In summary, the double-row self-aligning ball bearing of this embodiment can effectively shorten the axial length of the bearing by disposing two rows of interlaced pockets 1. Compared with the methods in the prior art, it is better able to adapt to working conditions with insufficient axial space.
[0017] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.
Claims
1. A double-row self-aligning ball bearing, comprising an inner ring, an outer ring, a cage between the inner ring and the outer ring, and double-row steel balls, wherein the cage is provided with two rows of pockets (1), and the double-row steel balls are arranged in the two rows of pockets (1) in a one-to-one correspondence, characterized in that: The two rows of pocket holes (1) are arranged in a staggered manner, and the hole walls of one row of pocket holes (1) are embedded between two adjacent pocket holes (1) in another row, so that the spacing between the hole walls of each pocket hole (1) in the two rows is equal.
2. The double-row self-aligning ball bearing according to claim 1, characterized in that: The retaining frame comprises an upper frame (2), a middle frame (3) and a lower frame (4); the upper frame (2), the middle frame (3) and the lower frame (4) are coaxially detachably connected to each other; a plurality of upper pocket holes (11) are provided at the lower end of the upper frame (2); upper side pocket holes (12) whose positions correspond to the upper pocket holes (11) in number are provided at the upper end of the middle frame (3); lower side pocket holes (13) whose positions correspond to the lower pocket holes (14) in number are provided at the upper end of the lower frame (4); the upper pocket holes (11) are spliced with the upper side pocket holes (12); and the lower pocket holes (14) are spliced with the lower side pocket holes (13) to form a structure of two rows of pocket holes (1) interlaced with each other.
3. The double row self-aligning ball bearing according to claim 2, characterized in that: An upper buckle groove (21) is provided at the lower end of the upper frame (2) at a position between the two upper pocket holes (11); a lower buckle groove is provided at the upper end of the lower frame (4) at a position between the two lower pocket holes (14); an upper snap buckle (31) is provided at the upper end of the middle frame (3) at a position between the two upper side pocket holes (12); a lower snap buckle is provided at the lower end of the middle frame (3) at a position between the two lower side pocket holes (13); the upper snap buckle (31) is buckled in one-to-one correspondence with the upper buckle groove (21) to fix the lower end of the upper frame (2) to the upper end of the middle frame (3); and the lower snap buckle is buckled in one-to-one correspondence with the lower buckle groove to fix the upper end of the lower frame (4) to the lower end of the middle frame (3).
4. The double row self-aligning ball bearing according to claim 3, characterized in that: The notches of the upper buckle groove (21) and the lower buckle groove are both provided with a clamping edge (5), and the upper buckle (31) and the lower buckle are both composed of a clamping plate (311) and a hook portion (312), and the hook portion (312) is in the shape of a right-angled prism. When the upper buckle (31) is buckled with the upper buckle groove (21), and the lower buckle is buckled with the lower buckle groove, the clamping plate (311) is inserted into the upper buckle groove (21) and the lower buckle groove, and the hook portion (312) hooks the clamping edge (5), and the right-angle side of the hook portion (312) abuts against the clamping edge (5).