Cylindrical roller bearing retainer with disc type structure

Abstract

The invention relates to a bearing retainer product structure, in particular to a cylindrical roller bearing retainer with a disc structure, which comprises an annular body which is an integrally formed sheet type disc; a plurality of retainer beams extending towards the center direction of the retainer are formed along the circumferential inner diameter of the annular body and are uniformly arranged in the annular body; a pocket hole of the retainer is formed between every two adjacent retainer beams; the pockets are in a semi-open type; a special design mode is adopted for the whole retainer, the pocket design is in a mode that the rollers are wrapped by the rollers in the radial direction, and compared with a traditional mode, great breakthrough is achieved; the bearing has the characteristics of light weight and small beam width, the design space utilization rate can be improved, the bearing capacity of the bearing is effectively improved, and meanwhile, the high-rotating-speed performance of the bearing is ensured. The structural design of the retainer changes the situation that a conventional bearing retainer is limited through a rolling body and is limited through the outer ring, and the limiting mode is also remarkably changed.

Description

Technical Field

[0001] The invention relates to a bearing retainer product structure, in particular to a disc-type cylindrical roller bearing retainer, and belongs to the technical field of bearings. Background Art

[0002] In order to ensure the strength of the cage, the conventional cylindrical roller bearings are generally thicker in width and occupy a larger space, resulting in a reduction in the number of rolling elements and lowering the bearing's load-bearing capacity. Cages of ordinary structures are generally supported by rollers and axially limited at both ends of the rollers. Although full-complement cylindrical roller bearings have an increased number of rollers and improved load-bearing capacity due to their cage-free structure, they are not suitable for use under high-speed conditions and are prone to jamming during operation. Summary of the invention

[0003] In view of the above problems, the present invention comprehensively considers the load-bearing, rotational speed and other working conditions of the bearing, and provides a disc-type cylindrical roller bearing retainer. The retainer as a whole adopts a special design method. The pocket design is to radially hold the roller, and the retainer is axially limited by the outer ring of the bearing. Compared with the traditional method, it has a great breakthrough and is characterized by light weight and small beam width.

[0004] In order to achieve the above-mentioned object, the technical solution adopted by the present invention is: a disc-type cylindrical roller bearing cage, comprising: an annular body, the annular body is an integrally formed disc; a plurality of cage beams extending toward the center direction of the cage are formed along the circumferential inner diameter of the annular body, the plurality of cage beams are evenly arranged in the annular body; a cage pocket is formed between each two adjacent cage beams; Furthermore, the pocket is in a semi-open form; Furthermore, each of the pockets is formed by two adjacent side walls of the cage beams to form a contact surface that matches the outer surface of the roller, that is, the inner wall surface of the pocket; Furthermore, the retainer holds the roller in the radial direction of the roller and is located in the middle of the entire axial length of the roller; Furthermore, the center diameter of the circle where the pockets are located matches the center diameter of the roller rotation; The beam width of the cage depends on the size of the center diameter of the circle where the pocket is located; under the condition of the same number of rollers, the larger the roller diameter, the larger the center diameter of the circle where the pocket is located, and the smaller the cage beam width; this solution can increase the number of rollers or increase the rolling element diameter by reducing the cage beam width, thereby improving the bearing capacity of the bearing.

[0005] Since the pocket hole is in a semi-open form, the end of the cage beam extending toward the center of the cage is the free end of the cage beam; Furthermore, a locking opening of the pocket is formed between the free ends of each two adjacent retaining frame beams; The cage of the above structure is limited by the outer ring. The cage is used in the bearing and also includes two oppositely arranged half outer rings. The two half outer rings are relatively matched together to form a grooved outer ring unit. The outer edge of the cage is clamped and installed in the groove of the outer ring raceway, so that the two end faces of the cage correspond to the side walls of the groove, and the outer diameter surface of the cage corresponds to the bottom of the groove. Furthermore, an axial gap between the retainer and the outer ring is provided between the two side walls of the groove and the two end surfaces of the retainer; a radial gap between the retainer and the outer ring is provided between the groove bottom and the outer diameter surface of the retainer; Further, the radial clearance is larger than the axial clearance; The distance between the two side walls of the groove is the groove width of the outer ring, and the outer ring groove width is slightly larger than the width of the cage to prevent the rotation from being affected; Furthermore, the outer edge of the cage is evenly provided with a plurality of oil holes along the circumferential direction, and the plurality of oil holes include radial lubricating oil holes and axial lubricating oil holes of the same number and corresponding to each other; the plurality of axial lubricating oil holes are all provided at the outer edge of the cage corresponding to the position of the cage beam and penetrate the two side end faces of the cage, and the plurality of radial lubricating oil holes are all provided perpendicularly to the axial lubricating oil holes from the outer diameter surface of the cage and communicated with the axial lubricating oil holes; The principle of setting the above-mentioned lubricating oil hole in the present invention is that the bearing is installed in the gear box, and the gear box cavity is filled with lubricating oil. The axial lubricating oil hole is conducive to the circulation of lubricating oil on the left and right sides of the retaining frame. In addition, the radial lubricating oil hole is connected with the axial oil hole. The lubricating oil can enter between the retaining frame and the groove of the outer ring raceway through the radial lubricating oil hole, so that the bearing is lubricated more fully.

[0006] The beneficial effects of the disc-type cylindrical roller bearing cage of the present invention are: The cage adopts a special design as a whole. The pocket design is in the form of roller radially holding the roller, which is a great breakthrough compared with the traditional method. It has the characteristics of light weight and small beam width, which can improve the utilization rate of design space and effectively improve the bearing load-bearing capacity, while ensuring the high-speed performance of the bearing.

[0007] The cage structure design changes the conventional bearing cage's limitation through rolling elements to limitation through the outer ring, and also has a significant change in the limitation method; this type of cage is generally used for cylindrical roller bearings supporting high-performance gearboxes. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 This is a structural diagram of a disc-type cylindrical roller bearing cage of the present invention.

[0009] Figure 2 for Figure 1 Front view cross-section of .

[0010] Figure 3 Diagram of the structure for installing rollers in cage.

[0011] Figure 4 for Figure 2 AA section view.

[0012] Figure 5 for Figure 4 A is enlarged and assembled with the bearing outer ring.

[0013] Figure 6 for Figure 2 The structure diagram of point B is enlarged and assembled with the roller.

[0014] In the figure, 1, annular body, 1.1, retaining frame beam, 1.1.1, free end of retaining frame beam, 1.2, pocket, 1.2.1, inner wall surface of pocket, 1.3, locking mouth L2, 2, roller, 3, half outer ring, 4, axial clearance, 5, radial clearance, B, groove width of outer ring, S, width of retaining frame, 6, radial lubricating oil hole, 7, axial lubricating oil hole. DETAILED DESCRIPTION

[0015] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0016] like Figure 1-6 The disc-type cylindrical roller bearing cage shown in the figure comprises: an annular body, wherein the annular body 1 is an integrally formed disc; a plurality of cage beams 1.1 extending toward the center of the cage are formed along the circumferential inner diameter of the annular body 1, and the plurality of cage beams 1.1 are evenly arranged in the annular body 1; a cage pocket 1.2 is formed between each two adjacent cage beams 1.1; The pocket 1.2 is semi-open; Each of the pockets 1.2 is formed by two adjacent side walls of the cage beams 1.1 to form a contact surface that matches the outer surface of the roller 2, that is, the inner wall surface 1.2.1 of the pocket; During assembly, the roller 2 is installed into the pocket hole 1.2 from one side of the cage, so that the entire inner wall surface 1.2.1 of the pocket hole contacts the outer diameter surface of the roller 2; The retainer holds the roller 2 in the radial direction of the roller 2 and is located in the middle of the entire axial length of the roller 2; The center diameter of the circle where the pocket hole 1.2 is located matches the rotation center diameter of the roller 2; The beam width of the cage depends on the size of the center diameter of the circle where the pocket 1.2 is located; under the condition of the same number of rollers 2, the larger the diameter of the roller 2, the larger the center diameter of the circle where the pocket 1.2 is located, and the smaller the cage beam width; this solution can increase the number of rollers 2 or increase the roller diameter by reducing the cage beam width, thereby improving the bearing capacity of the bearing.

[0017] Since the pocket 1.2 is in a semi-open form, the end of the cage beam 1.1 extending toward the center of the cage is the free end 1.1.1 of the cage beam; A locking opening 1.3 of the pocket 1.2 is formed between the free ends 1.1.1 of each two adjacent cage beams to prevent the roller 2 from falling out of the pocket 1.2 and to lock the roller 2; the distance of the locking opening 1.3 is determined by reasonable calculation.

[0018] Specifically, the distance L2 of the locking opening 1.3 in this embodiment is generally smaller than the diameter of the rolling element by about 1 mm. The locking amount is not fixed and is designed differently according to the substrate conditions. The cage of the above structure is limited by the outer ring. The cage is used in the bearing and also includes two oppositely arranged half outer rings 3. The two half outer rings 3 are relatively matched together to form a grooved outer ring unit. The outer edge of the cage is clamped and installed in the groove of the outer ring unit, so that the two end faces of the cage correspond to the side walls of the groove, and the outer diameter surface of the cage corresponds to the bottom of the groove. An axial gap 4 between the cage and the outer ring is provided between the two side walls of the groove and the two end surfaces of the cage; a radial gap 5 between the cage and the outer ring is provided between the groove bottom and the outer diameter surface of the cage; The radial clearance 5 is larger than the axial clearance 4 to prevent the cage from wearing during operation; Specifically, the axial clearance is approximately 0.2~0.4mm, and the radial clearance is approximately 0.7~1.0mm. The clearance may vary slightly depending on the bearing size.

[0019] The distance between the two side walls of the above-mentioned groove is the groove width B of the outer ring, and the outer ring groove width B is slightly larger than the width S of the retaining frame to prevent affecting the rotation; it should be noted that the outer ring groove width B cannot be too large relative to the width S of the retaining frame (cannot exceed the value range of the above-mentioned axial clearance) to prevent the retaining frame from being skewed during the operation of the bearing.

[0020] The principle of setting the above-mentioned lubricating oil holes is that the bearing is installed in the gear box, and the gear box cavity is filled with lubricating oil. The axial lubricating oil holes are conducive to the circulation of lubricating oil on the left and right sides of the retaining frame. In addition, the radial lubricating oil holes are connected with the axial oil holes. The lubricating oil can enter between the retaining frame and the groove of the outer ring raceway through the radial lubricating oil holes, so that the bearing is more fully lubricated.

[0021] Through the above-mentioned design of the lock 1.3, the roller 2 is installed in the pocket 1.2, so that the bearing outer ring, the roller 2 and the retaining frame form an assembly, preventing the roller 2 from falling from the inner diameter direction during the installation process.

[0022] A plurality of oil holes are evenly arranged along the circumferential direction on the outer edge of the retaining frame, and the plurality of oil holes include radial lubricating oil holes 6 and axial lubricating oil holes 7 of the same number and corresponding to each other; the plurality of axial lubricating oil holes 7 are all arranged on the outer edge of the retaining frame corresponding to the position of the retaining frame beam 1.1 and penetrate the end faces of both sides of the retaining frame, and the plurality of radial lubricating oil holes 6 are all arranged perpendicular to the axial lubricating oil holes 7 from the outer diameter surface of the retaining frame and connected with the axial lubricating oil holes 7; the arrangement of the oil holes of the retaining frame facilitates the inflow of lubricating oil, thereby improving the lubrication performance of the bearing.

[0023] The present invention comprehensively considers the load-bearing, rotational speed and other working conditions of the bearing, and designs a disc-type cylindrical roller bearing cage with a lighter weight and smaller beam width, which can effectively improve the load-bearing capacity of the bearing. This type of cage is generally used on cylindrical roller bearings supporting high-performance gearboxes.

[0024] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0025] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0026] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0028] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0029] The above examples are only the best embodiments of the present invention. Obviously, the present invention is not limited to the above embodiments, and many variations are possible. All variations that can be directly derived or associated with the contents disclosed by a person skilled in the art should be considered as the protection scope of the present invention.

Claims

1. Disc-type cylindrical roller bearing cage, characterized in that: include: The annular body is an integrally formed disc; a plurality of cage beams extending toward the center of the cage are formed along the circumferential inner diameter of the annular body, and the plurality of cage beams are evenly arranged in the annular body; a cage pocket is formed between each two adjacent cage beams.

2. The disc-type cylindrical roller bearing cage according to claim 1, characterized in that: The pocket is in a semi-open form.

3. The disc-type cylindrical roller bearing cage according to claim 1, characterized in that: Each pocket hole is formed by two adjacent side walls of the cage beams to form a contact surface that matches the outer surface of the roller, that is, the inner wall surface of the pocket hole.

4. The disc-type cylindrical roller bearing cage according to claim 1, characterized in that: The retaining frame holds the roller in the radial direction of the roller and is located in the middle of the entire axial length of the roller.

5. The disc-type cylindrical roller bearing cage according to claim 1, characterized in that: The center diameter of the circle where the pocket holes are located matches the center diameter of the roller rotation.

6. The disc-type cylindrical roller bearing cage according to claim 1, characterized in that: The end of the cage beam extending toward the center of the cage is the free end of the cage beam; a locking opening of the pocket is formed between the free ends of every two adjacent cage beams.

7. The disc-type cylindrical roller bearing cage according to any one of claims 1 to 6, characterized in that: The retainer is limited by the outer ring. The retainer is used in the bearing and also includes two relatively arranged half outer rings. The two half outer rings are relatively matched together to form a complete grooved outer ring. The outer diameter edge of the retainer is clamped and installed in the groove of the outer ring raceway, so that the two end faces of the retainer correspond to the side walls of the groove, and the outer diameter surface of the retainer corresponds to the bottom of the groove.

8. The disc-type cylindrical roller bearing cage according to claim 7, characterized in that: An axial gap is set between the two side walls of the groove and the two end surfaces of the retainer; a radial gap is set between the groove bottom and the outer diameter surface of the retainer.

9. The disc-type cylindrical roller bearing cage according to claim 1, characterized in that: A plurality of oil holes are evenly arranged along the circumferential direction on the outer edge of the retainer, and the plurality of oil holes include radial lubricating oil holes and axial lubricating oil holes of the same number and corresponding to each other; the plurality of axial lubricating oil holes are all arranged on the outer edge of the retainer corresponding to the position of the retainer beam and penetrate the end faces of both sides of the retainer, and the plurality of radial lubricating oil holes are all arranged perpendicular to the axial lubricating oil holes from the outer diameter surface of the retainer and are connected to the axial lubricating oil holes.

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