Double-row deep groove ball bearing structure

Abstract

This utility model relates to the field of double-row deep groove bearings, specifically a double-row deep groove ball bearing structure, including an inner ring body, an outer ring body, and two sets of balls. The outer wall of the inner ring body has two first deep grooves, and the inner wall of the outer ring body has two second deep grooves. The two ends of the balls are located in the first deep grooves and the fixed ring cage, respectively. Through the detachable splicing structure of the main frame and the double auxiliary frames, the second connecting piece of the auxiliary frame is rigidly fixed to the first connecting piece of the main frame with connecting bolts, forming a stable annular limiting structure. This prevents the cage from loosening or displacing due to vibration or load during bearing operation. At the same time, a circumferential array of support rollers is added to the fixed ring cage of the main frame. The rollers directly abut against the inner ring body, further providing radial support for the cage and reducing frictional loss between the cage and the inner and outer rings. From a structural design perspective, this significantly improves the overall stability of the cage and indirectly extends the service life of the bearing.

Description

Technical Field

[0001] This utility model relates to the field of double-row deep groove bearing technology, and specifically to a double-row deep groove ball bearing structure. Background Technology

[0002] Double row deep groove ball bearings are rolling bearings with a deep groove raceway design. Standard models include 4200A and 4300A. When the outer and inner diameters are the same as those of single row deep groove ball bearings, the axial width is larger, and the radial load capacity is significantly higher than that of single row models. They are suitable for configurations where the load capacity of single row bearings is insufficient. This bearing adopts a design without ball loading notches, and the raceway and steel balls have a high degree of tightness. It can withstand radial loads and bidirectional axial loads at the same time.

[0003] Chinese patent CN219691990U discloses a double-row deep groove ball bearing. Through the setting of a combination mechanism, it realizes the combined installation of the cage. When individual balls are damaged, they can be replaced individually. The operation is simple, improving work efficiency and reducing the cost of use.

[0004] Although the above solution completes the cage installation through a combination mechanism, the cage relies on the combination groove and combination pin for cooperation, and the stability of its own structure is difficult to guarantee. In addition, the balls need to be installed inside the cage after assembly, rather than directly between the inner and outer rings of the bearing, which makes the bearing assembly process more complicated.

[0005] Therefore, this utility model provides a double-row deep groove ball bearing structure to solve the above problems. Utility Model Content

[0006] In order to overcome the shortcomings of the prior art, this utility model provides a double-row deep groove ball bearing structure to solve the problem that the cage relies on the combination groove and combination pin for cooperation, and the stability of its own structure is difficult to guarantee. In addition, the balls need to be installed inside the cage after assembly, rather than directly between the inner and outer rings of the bearing, which makes the bearing assembly process more complicated.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0008] A double-row deep groove ball bearing structure includes an inner ring body, an outer ring body, and two sets of balls. The outer wall of the inner ring body has two first deep grooves, and the inner wall of the outer ring body has two second deep grooves. The two ends of the balls are located in the first deep grooves and in the retaining ring, respectively. A retaining ring is provided in the inner ring body for limiting the position of the two sets of balls.

[0009] The retainer includes a main frame and two sub-frames. The two sub-frames are detachably installed on both sides of the main frame and form two sets of annular structures in a circumferential array. The middle part of the ball bearing is located inside the annular structure.

[0010] Preferably, the main frame includes a fixed ring frame, and first arc-shaped members arranged in a circular array are fixedly connected to both sides of the fixed ring frame. A first connecting member is provided between adjacent first arc-shaped members, and the two ends of the first connecting member are respectively fixedly connected to the two first arc-shaped members.

[0011] Preferably, the subframe includes second arc-shaped components arranged in a circumferential array, with a second connecting component provided between adjacent second arc-shaped components, and both ends of the second connecting component being fixedly connected to the two second arc-shaped components respectively, and the second arc-shaped components matching the first arc-shaped components.

[0012] Preferably, a connecting bolt is installed on the second connector, and the other end of the connecting bolt is threaded to the first connector.

[0013] Preferably, the fixing ring frame has mounting slots arranged in a circular array, and each mounting slot is rotatably connected to a support roller, with the support roller abutting against the inner ring body.

[0014] Preferably, the inner ring body has a first assembly groove, the outer ring body has a second assembly groove, a protective ring is provided between the inner ring body and the outer ring body, and the two ends of the protective ring are respectively installed in the first assembly groove and the second assembly groove.

[0015] The beneficial effects of this utility model are as follows:

[0016] 1. Through the detachable splicing structure of the main frame and the double auxiliary frames, the second connecting piece of the auxiliary frame is rigidly fixed to the first connecting piece of the main frame with connecting bolts, forming a stable annular limiting structure. This prevents the cage from loosening or shifting due to vibration or load during bearing operation. At the same time, a circular array of support rollers is added to the fixing ring of the main frame. The rollers directly abut against the inner ring, further providing radial support for the cage and reducing frictional loss between it and the inner and outer rings. From a structural design perspective, this significantly improves the overall stability of the cage and indirectly extends the service life of the bearing.

[0017] 2. By first placing the main frame retaining ring between the inner and outer rings, the two ends of the balls are directly placed into the first deep groove of the inner ring and the retaining ring, completing the initial positioning of the balls. Then, only the second arc-shaped part of the sub-frame and the first arc-shaped part of the main frame need to be aligned and fixed with connecting bolts to complete the cage assembly. The entire process does not require pre-assembly of the cage. The assembly of the balls and cage can be completed directly between the inner and outer rings of the bearing. The steps are simpler, the operation is less difficult, and assembly time can be effectively saved, improving production or maintenance efficiency. Attached Figure Description

[0018] Figure 1 The three-dimensional representation of this utility model Figure 1 .

[0019] Figure 2 This is an exploded view of the present invention.

[0020] Figure 3 This is a cross-sectional view of the present invention.

[0021] Figure 4 This utility model Figure 3 An enlarged schematic diagram of the structure at point A in the middle.

[0022] In the diagram: 1. Inner ring body; 2. Outer ring body; 3. First deep groove; 4. Fixing ring frame; 5. First arc-shaped component; 6. First connecting component; 7. Second connecting component; 8. Second arc-shaped component; 9. Ball bearing; 10. Connecting bolt; 11. Mounting groove; 12. Support roller; 13. Protective ring; 14. Second deep groove; 15. First assembly groove; 16. Second assembly groove. Detailed Implementation

[0023] The following will refer to the attached reference. Figures 1 to 4 The various embodiments of this utility model will be described in detail below. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of this utility model and are not intended to limit the scope of protection of this utility model.

[0024] A double-row deep groove ball bearing structure includes an inner ring body 1, an outer ring body 2, and two sets of balls 9. The outer wall of the inner ring body 1 has two first deep grooves 3, and the inner wall of the outer ring body 2 has two second deep grooves 14. The two ends of the balls 9 are located in the first deep grooves 3 and the retaining ring 4, respectively. A retaining cage is provided in the inner ring body 1 for limiting the two sets of balls 9.

[0025] The inner ring 1 is located inside the outer ring 2. The two ends of the ball bearing 9 are respectively housed in the first deep groove 3 and the fixed ring 4. The two sets of ball bearings 9 form a rotational support structure to ensure the stability of the bearing structure under use.

[0026] The retaining frame includes a main frame and two sub-frames. The two sub-frames are detachably installed on both sides of the main frame and form two sets of circular arrays. The middle part of the ball bearing 9 is located inside the circular structure.

[0027] In this embodiment, the main frame includes a fixed ring frame 4, and first arc-shaped members 5 arranged in a circular array are fixedly connected to both sides of the fixed ring frame 4. A first connecting member 6 is provided between adjacent first arc-shaped members 5, and the two ends of the first connecting member 6 are respectively fixedly connected to the two first arc-shaped members 5.

[0028] The fixed ring frame 4 is located in the middle section of the inner ring body 1. When splicing the bearing structure, the fixed ring frame 4 needs to be placed between the inner ring body 1 and the outer ring body 2 first, and then the ball body 9 is placed between the inner ring body 1 and the outer ring body 2. The middle part of the ball body 9 is placed in the first arc-shaped part 5, and its two ends are placed in the first deep groove 3 and the fixed ring frame 4.

[0029] In this embodiment, the subframe includes second arc-shaped members 8 arranged in a circular array, and a second connecting member 7 is provided between adjacent second arc-shaped members 8. The two ends of the second connecting member 7 are respectively fixedly connected to the two second arc-shaped members 8, and the second arc-shaped members 8 are matched with the first arc-shaped members 5.

[0030] After the ball bearing 9 is pre-positioned, the sub-frame is placed between the inner ring 1 and the outer ring 2, and the second arc-shaped part 8 is aligned with the first arc-shaped part 5. The second arc-shaped part 8 and the first arc-shaped part 5 will form a ring structure, thereby positioning the ball bearing 9.

[0031] Specifically, a connecting bolt 10 is installed on the second connecting member 7, and the other end of the connecting bolt 10 is threaded to the first connecting member 6.

[0032] After aligning the second arc-shaped component 8 with the first arc-shaped component 5, the connecting bolts 10 are installed on the first connecting component 6 and the second connecting component 7, which can fix the sub-frame onto the main frame and complete the assembly of the cage.

[0033] In this embodiment, the fixed ring frame 4 is provided with mounting grooves 11 arranged in a circular array. Each mounting groove 11 is rotatably connected to a support roller 12, and the support roller 12 abuts against the inner ring body 1. In order to improve the stability of the fixed ring frame 4 between the inner ring body 1 and the outer ring body 2, the support roller 12 in the mounting groove 11 can be used to support the fixed ring frame 4.

[0034] The inner ring body 1 has a first assembly groove 15, the outer ring body 2 has a second assembly groove 16, and a protective ring 13 is provided between the inner ring body 1 and the outer ring body 2, with the two ends of the protective ring 13 respectively installed in the first assembly groove 15 and the second assembly groove 16.

[0035] With the help of the protective ring 13 installed in the first assembly groove 15 and the second assembly groove 16, a shield is formed at the assembly position of the inner ring body 1 and the outer ring body 2, which has a protective effect and can also block the lubricating oil between the inner ring body 1 and the outer ring body 2. The protective ring 13 is installed by elastic assembly of nitrile rubber, with the rubber part close to the assembly groove.

[0036] It should be noted that in the description of this utility model, terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," which indicate direction or positional relationships, are based on the direction or positional relationships shown in the accompanying drawings. These are used merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0037] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0038] The technical solution of this utility model has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the protection scope of this utility model is obviously not limited to these specific embodiments. Without departing from the principle of this utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of this utility model.

Claims

1. A double-row deep groove ball bearing structure, comprising an inner ring body (1), an outer ring body (2), and two sets of balls (9), characterized in that, The outer wall of the inner ring body (1) has two first deep grooves (3), and the inner wall of the outer ring body (2) has two second deep grooves (14). The two ends of the ball body (9) are located in the first deep groove (3) and the fixed ring frame (4) respectively. The inner ring body (1) is provided with a retainer for limiting the two sets of ball bodies (9). The retainer includes a main frame and two sub-frames. The two sub-frames are detachably installed on both sides of the main frame and form two sets of annular structures in a circular array. The middle part of the ball bearing (9) is located inside the annular structure.

2. The double-row deep groove ball bearing structure according to claim 1, characterized in that, The main frame includes a fixed ring frame (4), and the two sides of the fixed ring frame (4) are fixedly connected with first arc-shaped parts (5) arranged in a circular array. A first connector (6) is provided between adjacent first arc-shaped parts (5), and the two ends of the first connector (6) are fixedly connected to the two first arc-shaped parts (5) respectively.

3. The double-row deep groove ball bearing structure according to claim 2, characterized in that, The subframe includes a second arc-shaped component (8) arranged in a circular array. A second connector (7) is provided between adjacent second arc-shaped components (8), and the two ends of the second connector (7) are respectively fixedly connected to the two second arc-shaped components (8), and the second arc-shaped component (8) matches the first arc-shaped component (5).

4. The double-row deep groove ball bearing structure according to claim 3, characterized in that, A connecting bolt (10) is installed on the second connector (7), and the other end of the connecting bolt (10) is threaded to the first connector (6).

5. The double-row deep groove ball bearing structure according to claim 2, characterized in that, The fixed ring frame (4) has mounting slots (11) arranged in a circular array. Each mounting slot (11) is rotatably connected to a support roller (12), and the support roller (12) abuts against the inner ring body (1).

6. The double-row deep groove ball bearing structure according to claim 1, characterized in that, The inner ring body (1) is provided with a first assembly groove (15), the outer ring body (2) is provided with a second assembly groove (16), a protective ring (13) is provided between the inner ring body (1) and the outer ring body (2), and the two ends of the protective ring (13) are respectively installed in the first assembly groove (15) and the second assembly groove (16).

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