An ultra-large self-aligning ball bearing and its cage

Abstract

This utility model belongs to the field of bearing technology, specifically relating to an ultra-large self-aligning ball bearing and its cage. The bearing includes an inner ring, two longitudinally split rows of semi-outer rings, two rows of the aforementioned cage, and several steel balls. The outer surface of the inner ring has two rows of inner ring raceways. Two rows of steel balls are arranged between the inner ring and the two rows of semi-outer rings, separated by the two rows of cages. An outer spacer is provided between the two rows of semi-outer rings. The cage includes several frame units, which together form the entire annular cage. Each frame unit has evenly distributed ball pockets on one end face of the annular cage, with adjacent ball pockets spaced apart by partition beams. Adjacent frame units are connected by connecting components. The cage adopts a split structure, which is simple to process, has high strength, and is convenient for installation and transportation.

Description

Technical Field

[0001] This utility model belongs to the field of bearing technology, specifically relating to an ultra-large self-aligning ball bearing and its cage. Background Technology

[0002] Currently, the traditional technical solution for manufacturing self-aligning ball bearing cages is to use an integrated structure. However, large astronomical telescopes need to be equipped with ultra-large self-aligning ball bearing structures. The integrated processing of ultra-large cages is very difficult. At the same time, the excessive weight of the bearings not only increases the load on the main equipment and places higher demands on the design of the support structure, but also hinders the lightweighting of the equipment and brings huge challenges and safety risks to transportation, hoisting and on-site installation. Utility Model Content

[0003] To address the shortcomings of existing technologies, the purpose of this invention is to provide a weight-reducing solution for ultra-large self-aligning ball bearings, and a non-integral machining solution for parts. This significantly reduces manufacturing difficulty, lightens weight, and facilitates bearing installation and maintenance.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: an ultra-large self-aligning ball bearing cage, comprising several arc-shaped cage units, the several cage units constituting the entire annular cage; the several cage units are uniformly provided with ball pocket holes on the surface of one end face constituting the entire annular cage, and adjacent ball pocket holes are spaced apart by partition beams; adjacent cage units are connected by connecting components.

[0005] Furthermore, the connecting assembly includes a cage connecting plate and a cage connecting screw. Each cage unit has a cage connecting groove at both ends along the circumferential direction, and the cage connecting groove has several connecting screw holes. The cage connecting grooves at the ends of adjacent cage units are joined together and the cage connecting plate is assembled. The connecting screw holes on the cage connecting plate correspond to the connecting screw holes of the two cage connecting grooves. The cage connecting plate is connected and fixed to two adjacent cage units by the cage connecting screw.

[0006] Furthermore, the frame unit comprises 2-6 units, all of which have the same arc center angle. Alternatively, the frame unit may comprise 3-6 units, with arc center angles ranging from 90 to 120 degrees, ensuring the strength of each individual frame unit.

[0007] Furthermore, the frame unit consists of four units, and the arc center angle corresponding to each frame unit is 90 degrees.

[0008] Furthermore, the frame connecting groove is provided with 3 connecting screw holes arranged in a row, and correspondingly, the retainer connecting plate has 6 connecting screw holes arranged in two rows.

[0009] Furthermore, the frame connecting groove is located axially between the bottom of the ball pocket and the non-pocket end of the cage.

[0010] On the other hand, this utility model discloses an ultra-large self-aligning ball bearing, including an inner ring, two longitudinally split rows of semi-outer rings, two rows of the aforementioned cages, and a plurality of steel balls; the outer surface of the inner ring has two rows of inner ring raceways, two rows of steel balls are arranged between the inner ring and the two rows of semi-outer rings, the two rows of steel balls are separated by the two rows of the aforementioned cages, and an outer spacer is arranged between the two rows of semi-outer rings.

[0011] Furthermore, the inner ring, the two rows of half outer rings, and / or the outer spacer ring are provided with weight reduction grooves.

[0012] Furthermore, the weight-reducing groove is a U-shaped groove with rounded corners.

[0013] Furthermore, multiple inner ring weight-reduction grooves are evenly formed on both end faces of the inner ring.

[0014] Furthermore, the inner ring weight-reducing groove is a U-shaped groove with rounded corners.

[0015] Furthermore, multiple semi-outer ring weight reduction grooves are evenly formed on the end faces of the two rows of semi-outer rings, and the semi-outer ring weight reduction grooves extend through the semi-outer rings axially.

[0016] Furthermore, the semi-outer ring weight reduction groove is a U-shaped groove with rounded corners.

[0017] Furthermore, multiple weight-reducing grooves are evenly formed on the end face of the outer spacer, and the weight-reducing grooves extend through the outer spacer along the axial direction.

[0018] Furthermore, the outer spacer ring weight reduction groove is a U-shaped groove with rounded corners.

[0019] Furthermore, the two rows of semi-outer rings and outer spacers are provided with corresponding outer ring connecting screw holes, and the two rows of semi-outer rings and outer spacers are connected and fixed by outer ring connecting screws installed in the outer ring connecting screw holes; multiple semi-outer ring weight reduction grooves are evenly opened on the end face of the two rows of semi-outer rings, and the semi-outer ring weight reduction grooves penetrate the semi-outer rings axially; multiple outer spacer weight reduction grooves are evenly opened on the end face of the outer spacer, and the outer spacer weight reduction grooves penetrate the outer spacer axially; the semi-outer ring weight reduction grooves and the outer spacer weight reduction grooves correspond one-to-one to form a through outer ring weight reduction groove; the outer ring connecting screw holes and the outer ring weight reduction grooves are alternately arranged.

[0020] Furthermore, the two rows of cages are spaced apart.

[0021] Furthermore, the inner surfaces of the two semi-outer rings are symmetrical spherical surfaces.

[0022] The beneficial effects of this utility model are: the cage adopts a split structure, which is simple to process and has high strength, and is convenient to install and transport. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the cage structure; Figure 2 for Figure 1 Explosion diagram at point A in the middle; Figure 3 This is a schematic diagram of the bearing structure; Figure 4 This is the main view of the bearing structure; Figure 5 for Figure 4 BB section view; Figure 6 for Figure 4 CC section view; In the picture: 1. Inner ring, 101. Inner ring weight reduction groove; 2. Semi-outer ring, 201. Semi-outer ring weight reduction groove; 3. Cage; 301. Cage unit; 302. Ball pocket hole; 303. Divider beam; 304. Cage connecting plate; 305. Cage connecting screw; 306. Cage connecting groove; 4. Steel balls; 5. Outer spacer ring; 501. Outer spacer ring weight reduction groove; 6. Outer ring connecting screws. Detailed Implementation

[0024] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0025] See appendix Figure 1-6 An ultra-large self-aligning ball bearing includes an inner ring 1, two longitudinally split rows of semi-outer rings 2, two rows of cages 3, and a plurality of steel balls 4; the outer surface of the inner ring 1 has two rows of inner ring raceways, and two rows of steel balls 4 are arranged between the inner ring 1 and the two rows of semi-outer rings 2. The two rows of steel balls 4 are separated by two rows of cages 3, and an outer spacer 5 is arranged between the two rows of semi-outer rings 2.

[0026] The cage comprises four arc-shaped frame units 301, each with an arc center angle of 90 degrees, forming the entire annular cage 3. Each of the four frame units 301 has evenly distributed ball-shaped pockets 302 on one end face of the annular cage, with adjacent ball-shaped pockets 302 spaced apart by partition beams 303. Adjacent frame units are connected by a connecting assembly, which includes a cage connecting plate 304 and cage connecting screws 305. Each frame unit is circumferentially... Both ends of the frame have frame connecting grooves 306, and the frame connecting grooves 306 have three connecting screw holes arranged in a row. The frame connecting grooves at the ends of adjacent frame units are joined together and a retainer connecting plate 304 is assembled. The outer surface of the retainer connecting plate 304 does not protrude from the outer circumference of the retainer. The retainer connecting plate 304 has 6 connecting screw holes arranged in two rows, corresponding one-to-one with the connecting screw holes of the frame connecting groove. The retainer connecting plate is connected and fixed to two adjacent frame units by retainer connecting screws 305.

[0027] Based on the above technical solution, it is difficult to machine ultra-large self-aligning ball bearing cages with a diameter of over 1m into a single piece. Therefore, segmented machining is adopted, with three threaded holes at the end of each segment. During assembly, they are fastened with connecting plates and screws. In this embodiment, the entire annular cage consists of four cage units 301, four sets of cage connecting plates 304, and four sets (six screws per set) of cage connecting screws 305.

[0028] Furthermore, the two rows of retainers 3 are spaced apart so as not to interfere with each other.

[0029] Furthermore, the frame connecting groove 306 is located axially between the bottom of the ball pocket and the non-pocket end of the cage. The frame connecting groove does not affect the rotation of the steel ball.

[0030] Furthermore, multiple inner ring weight-reducing grooves 101 are evenly formed on both end faces of the inner ring 1; the inner ring weight-reducing grooves 101 are U-shaped grooves with rounded corners. Multiple semi-outer ring weight-reducing grooves 201 are evenly formed on the end faces of the two rows of semi-outer rings 2, the semi-outer ring weight-reducing grooves 201 extending axially through the semi-outer ring 2, and the semi-outer ring weight-reducing grooves 201 are U-shaped grooves with rounded corners. Multiple outer spacer ring weight-reducing grooves 501 are evenly formed on the end face of the outer spacer ring 5, the outer spacer ring weight-reducing grooves 501 extending axially through the outer spacer ring 5, and the outer spacer ring weight-reducing grooves 501 are U-shaped grooves with rounded corners. The semi-outer ring weight-reducing grooves 201 and the outer spacer ring weight-reducing grooves 501 correspond one-to-one to form a continuous outer ring weight-reducing groove. The two rows of semi-outer rings and outer spacers are provided with corresponding outer ring connecting screw holes. The two rows of semi-outer rings and outer spacers are connected and fixed by outer ring connecting screws 6 installed in the outer ring connecting screw holes. The outer ring connecting screw holes and outer ring weight reduction grooves are alternately arranged.

[0031] Based on the above technical solution, weight-reducing grooves are reasonably opened on the inner ring 1, the semi-outer ring 2, and the outer spacer 3. The core is to ensure the structural strength and integrity of the key stress-bearing areas of the bearing rings. Not only are U-shaped weight-reducing grooves opened to reduce stress concentration, but grooves are also avoided in the main stress-bearing areas such as the steel balls and raceways. Grooves are only opened on the end faces, i.e., the non-stressed or secondary stress-bearing areas of the bearing rings, to minimize the impact on the overall load-bearing capacity. In this embodiment, U-shaped grooves with rounded corners are opened on the end faces of the inner ring, outer ring, and outer spacer to avoid the use of right-angled or sharp-cornered grooves, reducing stress concentration. Grooving on the end faces results in less stress in these areas, thus having a smaller impact on the overall load-bearing capacity of the bearing.

[0032] Furthermore, the inner surfaces of the two semi-outer rings 2 are symmetrical spherical surfaces, which serve to center the object.

[0033] It should be noted that the parts of this utility model not described in detail are existing technologies.

[0034] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0035] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0036] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0037] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0038] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0039] The above-listed embodiments are merely preferred embodiments of this utility model. Obviously, this utility model is not limited to the above embodiments and many variations are possible. All variations that can be directly derived or conceived by those skilled in the art from the disclosure of this utility model should be considered within the protection scope of this utility model.

Claims

1. A super-toroidal self-aligning ball cage, characterized by: The device comprises several frame units, which together form an entire annular cage. Each frame unit has evenly distributed ball-shaped holes on one end face of the annular cage, with adjacent ball-shaped holes spaced apart by partition beams. Adjacent frame units are connected by a connecting assembly. The connecting assembly includes a cage connecting plate and cage connecting screws. Each frame unit has a frame connecting groove at both ends along the circumferential direction, and the frame connecting groove contains several connecting screw holes. The frame connecting grooves at the ends of adjacent frame units are joined together to assemble the cage connecting plate. The connecting screw holes on the cage connecting plate correspond to the connecting screw holes of the two frame connecting grooves. The cage connecting plate is then connected and fixed to two adjacent frame units using cage connecting screws.

2. A cage for an ultra-large self-aligning ball bearing according to claim 1, characterized in that: The frame unit consists of 2-6 components.

3. A cage for an ultra-large self-aligning ball bearing according to claim 1, characterized in that: The frame consists of four units, each with a central arc angle of 90 degrees.

4. A super-large self-aligning ball bearing, characterized in that: It includes an inner ring, two longitudinally split rows of semi-outer rings, two rows of cages as described in any one of claims 1-3, and a plurality of steel balls; the outer surface of the inner ring has two rows of inner ring raceways, two rows of steel balls are disposed between the inner ring and the two rows of semi-outer rings, the two rows of steel balls are separated by the two rows of cages, and an outer spacer is disposed between the two rows of semi-outer rings.

5. A super-large self-aligning ball bearing according to claim 4, characterized in that: The inner ring, the two rows of half outer rings, and / or the outer spacer ring are provided with weight reduction grooves.

6. A super-large self-aligning ball bearing according to claim 4, characterized in that: Multiple inner ring weight reduction grooves are evenly distributed on both end faces of the inner ring; the inner ring weight reduction grooves are U-shaped grooves with rounded corners.

7. A super-large self-aligning ball bearing according to claim 4, characterized in that: Multiple semi-outer ring weight reduction grooves are evenly formed on the end faces of the two rows of semi-outer rings, and the semi-outer ring weight reduction grooves extend through the semi-outer rings along the axial direction; the semi-outer ring weight reduction grooves are U-shaped grooves with rounded corners.

8. A super-large self-aligning ball bearing according to claim 4, characterized in that: Multiple weight-reducing grooves are evenly distributed on the end face of the outer spacer, and the weight-reducing grooves extend through the outer spacer along the axial direction; the weight-reducing grooves are U-shaped grooves with rounded corners.

9. A super-large self-aligning ball bearing according to claim 4, characterized in that: The two rows of semi-outer rings and outer spacers are provided with corresponding outer ring connecting screw holes. The two rows of semi-outer rings and outer spacers are connected and fixed by outer ring connecting screws installed in the outer ring connecting screw holes. Multiple semi-outer ring weight reduction grooves are evenly opened on the end face of the two rows of semi-outer rings. The semi-outer ring weight reduction grooves penetrate the semi-outer rings axially. Multiple outer spacer weight reduction grooves are evenly opened on the end face of the outer spacer. The outer spacer weight reduction grooves penetrate the outer spacer axially. The semi-outer ring weight reduction grooves and outer spacer weight reduction grooves correspond one-to-one to form a through outer ring weight reduction groove. The outer ring connecting screw holes and outer ring weight reduction grooves are alternately arranged.

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