Square head rivet cage and bearing

Abstract

The utility model relates to bearing technical field, concretely is a kind of square head riveting cage and bearing, it includes cage seat and cage cover, cage seat includes bottom seat ring and the multiple pocket beam of equidistance being set on the bottom seat ring, and the bottom seat ring between the two pocket beams of adjacent setting has first contact convex part, the pocket beam of first contact convex part two sides respectively is provided with second contact convex part, the end of pocket beam away from bottom seat ring is square head riveting part;Cage cover is provided with multiple and the insertion hole of square head riveting part is riveted, the two adjacent insertion holes between the side of cage cover facing bottom seat ring are provided with third contact convex part.Cage can play the role of isolation between cylindrical roller, mainly sliding friction, and it reduces the friction contact area between cage and cylindrical roller by optimizing cage structure, to reach the purpose of reducing bearing temperature rise amplitude.

Description

Technical Field

[0001] This utility model relates to the field of bearing technology, specifically to a square-head riveted cage and bearing. Background Technology

[0002] During operation, cylindrical bearings can experience excessive temperature rise due to factors such as operating conditions and ambient temperature. When the bearing temperature rises too high, the viscosity of the lubricating oil decreases, leading to a thinning of the lubricating oil film between the rolling elements and the inner ring raceway, and between the rolling elements and the outer ring raceway. This thinned lubricating oil film cannot effectively isolate the rollers and raceways, ultimately causing premature peeling and other failures in the raceways, thus reducing the actual service life of the bearing. Utility Model Content

[0003] In view of the deficiencies of the prior art, this utility model provides a square-head riveted cage and bearing. The cage plays an isolation role between the cylindrical rollers, mainly due to sliding friction. By optimizing the cage structure, the frictional contact area between the cage and the cylindrical rollers is reduced, thereby achieving the purpose of reducing the bearing temperature rise.

[0004] To achieve the above objectives, the present invention provides a square-head riveting retainer, comprising a retainer base and a retainer cover. The retainer base includes a bottom ring and a plurality of pocket beams evenly spaced on the bottom ring. A first contact protrusion is provided on the bottom ring between two adjacent pocket beams. A second contact protrusion is provided on each of the pocket beams on both sides of the first contact protrusion. The end of the pocket beam away from the bottom ring is a square-head riveting part. The retainer cover has a plurality of insertion holes for riveting with the square-head riveting parts. A third contact protrusion is provided between two adjacent insertion holes on the side of the retainer cover facing the bottom ring.

[0005] Furthermore, the boundary line between the bottom seat ring and the pocket beam is an arc.

[0006] Furthermore, the pocket of the cage formed by riveting the cage seat and the cage cover is partially cylindrical.

[0007] Furthermore, the square-head riveting part includes four mutually enclosing curved surfaces.

[0008] A bearing includes a square-headed riveted cage as described above and a plurality of cylindrical rollers; each of the cylindrical rollers has a clearance recess on both end faces, the outer portion of the clearance recess on one end face slides in contact with the first contact protrusion, the outer portion of the clearance recess on the other end face slides in contact with the third contact protrusion, and a portion of the side surface of the cylindrical roller slides in contact with the second contact protrusion.

[0009] Furthermore, the depth and diameter of the clearance recesses opened on both ends of the cylindrical roller are the same.

[0010] Furthermore, the sidewall of the avoidance recess forms an obtuse angle with the bottom surface of the avoidance recess.

[0011] Furthermore, the third contact protrusion makes sliding contact with the middle part of the cylindrical roller.

[0012] Furthermore, if the radius of the cylindrical roller is R1 and the maximum diameter of the clearance recess is R2, then R2 = 0.5R1; and if the maximum radius of the third contact protrusion is R3, then R3 satisfies 0.6R1. <R3<0.8R1。

[0013] Furthermore, when the length of the cylindrical roller is L1 and the dimension of the second contact protrusion along the length direction of the cylindrical roller is L2, it satisfies 0.25L1. <L2<0.4L1。

[0014] The beneficial effects of this invention are as follows: The bottom ring of the retainer is provided with a first contact protrusion. The sides of the first contact protrusion are lower than the first contact protrusion. After the cylindrical roller is installed, it only slides in contact with a portion of the first contact protrusion, which reduces the contact area between the end face of the cylindrical roller and the end face of the pocket, thereby reducing sliding friction and the heat generated by friction. In addition, a second contact protrusion is provided on the pocket beam. The sides of the second contact protrusion are lower than the second contact protrusion. Only the second contact protrusion slides in contact with the side of the cylindrical roller, which reduces the contact area between the side of the cylindrical roller and the sides of the pocket, thereby reducing sliding friction and the heat generated by friction. The provision of the first and second contact protrusions increases the space between the cylindrical roller and the pocket, making it easier for lubricating oil to enter and flow out of this space. This allows the lubricating oil to carry away more heat, thereby reducing the bearing temperature rise. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a square-headed riveting retainer in one embodiment of the present invention; Figure 2 for Figure 1 Cross-sectional view of AA in the middle; Figure 3 This is an enlarged schematic diagram of the pocket of a square-headed riveting retainer in one embodiment of the present invention; Figure 4 This is a three-dimensional structural diagram of a square-headed rivet retainer according to one embodiment of the present utility model; Figure 5 This is a schematic diagram of the pocket outline and roller outline of a square-headed riveting retainer in one embodiment of the present invention. Figure 6This is a schematic diagram showing the pocket size and roller size of a square-headed riveting retainer in one embodiment of the present invention; In the picture: 100. Cage base; 110. Bottom seat ring; 111. First contact protrusion; 120. Pocket beam; 121. Second contact protrusion; 122. Square head riveting part; 1221. Curved surface; 123. Arc line. 200. Cage cover; 210. Insertion hole; 220. Third contact protrusion. 300. Cylindrical roller; 310. Clearance recess; 311. Side wall; 312. Bottom surface. 400. Pocket hole. Detailed Implementation

[0016] 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.

[0017] See Figures 1-4 The diagram shows a schematic of a square-head riveting retainer according to an embodiment of the present invention. It includes a retainer base 100 and a retainer cover 200. The retainer base 100 includes a bottom seat ring 110 and a plurality of pocket beams 120 equally spaced on the bottom seat ring 110. A first contact protrusion 111 is provided on the bottom seat ring 110 between two adjacent pocket beams 120. A second contact protrusion 121 is provided on the pocket beams 120 on both sides of the first contact protrusion 111. The end of the pocket beam 120 away from the bottom seat ring 110 is a square-head riveting part 122. The retainer cover 200 has a plurality of insertion holes 210 that are riveted to the square-head riveting parts 122. A third contact protrusion 220 is provided between two adjacent insertion holes 210 on the side of the retainer cover 200 facing the bottom seat ring 110.

[0018] The aforementioned square-head riveted retainer is formed by riveting a retainer base 100 and a retainer cover 200 together. The bottom ring 110 of the retainer base 100 is provided with a first contact protrusion 111. The height of the two sides of the first contact protrusion 111 is lower than that of the first contact protrusion 111. After the cylindrical roller 300 is installed, it only slides in contact with a portion of the first contact protrusion 111, which reduces the contact area between the end face of the cylindrical roller 300 and the end face of the pocket 400, thereby reducing sliding friction and thus reducing the heat generated by friction. In addition, a second contact protrusion 121 is provided on the pocket beam 120. The height of the two sides of the second contact protrusion 121 is lower than that of the second contact protrusion 121, and only the second contact protrusion 121 slides in contact with the side of the cylindrical roller 300. This reduces the contact area between the side of the cylindrical roller 300 and the two sides of the pocket 400, thereby reducing sliding friction and thus reducing the heat generated by friction. The arrangement of the first contact protrusion 111 and the second contact protrusion 121 increases the gap between the cylindrical roller 300 and the pocket 400, making it easier for lubricating oil to enter and flow out of the space. This allows the lubricating oil to carry away more heat, thereby reducing the bearing temperature rise.

[0019] See also Figure 2 and Figure 4 In one embodiment, the boundary line between the bottom seat ring 110 and the pocket beam 120 is an arc line 123.

[0020] See also Figure 4 In one embodiment, the pocket 400 of the retainer formed by riveting the retainer base 100 and the retainer cover 200 is partially cylindrical. For example... Figure 1 and Figure 2 As shown, the cage pocket 400 is cylindrical in shape, and the cylindrical roller 300 is located within the pocket 400. Therefore, the cage is guided by the cylindrical roller 300. The pocket 400 is not a straight pocket; this design eliminates the friction caused by the cage being guided by the inner or outer ring flange, thereby further reducing the degree of bearing temperature rise.

[0021] In one embodiment, the square-head riveting portion 122 includes four mutually enclosing curved surfaces 1221.

[0022] See also Figure 4 and Figure 5 On the other hand, this utility model also provides a bearing, including the aforementioned square-headed riveted cage and cylindrical rollers 300, such as... Figure 5As shown, the cylindrical roller 300 has clearance recesses 310 on both ends. The outer part of the clearance recess 310 on one end face slides in contact with the first contact protrusion 111 of the bottom seat ring 110, and the contact position is an annular surface. The outer part of the clearance recess 310 on the other end face of the cylindrical roller 300 slides in contact with the third contact protrusion 220 of the cage cover 200, and the contact position is also an annular surface. Part of the side surface of the cylindrical roller 300 slides in contact with the second contact protrusion 121 of the pocket beam 120.

[0023] The above-mentioned bearings, such as Figure 5 As shown, the relationship between the cage profile and the cylindrical roller 300 profile is such that the contact area between the surface of the cylindrical roller 300 and the cage pocket is reduced, and the contact area between the end face of the cylindrical roller 300 and the end face of the cage pocket is also reduced. Due to the reduced contact in both cases, sliding friction is decreased, thereby reducing the heat generated by friction. Simultaneously, the increased space between the cylindrical roller 300 and the cage pocket facilitates the entry and exit of lubricating oil, allowing the lubricating oil to carry away more heat, thus reducing the bearing temperature rise.

[0024] like Figure 3 As shown, the pocket 400 is formed after the cage base 100 and the cage cover 200 are riveted together. The middle of the pocket 400 contacts the cylindrical roller 300, which serves to isolate the roller; the gap between the pocket 400 and the cylindrical roller 300 on both sides is increased.

[0025] The cylindrical rollers 300 of the aforementioned bearing have clearance recesses 310 at both ends. These clearance recesses 310 reduce friction and heat generation between themselves and the end faces of the cage pockets 400. Simultaneously, this reduces the contact area between the end faces of the pockets 400 and the end faces of the cylindrical rollers 300, thereby reducing the friction area and lowering the bearing temperature rise.

[0026] like Figure 5 As shown, in one embodiment, the clearance recesses 310 opened on both ends of the cylindrical roller 300 have the same depth and diameter. With this setting, the two sides of the cylindrical roller 300 are more balanced and the center of gravity will not shift, which is beneficial to the operation of the bearing.

[0027] In one embodiment, the sidewall 311 of the clearance recess 310 and the bottom surface 312 of the clearance recess 310 form an obtuse angle. This arrangement can better guide the lubricating oil entering the bearing, thereby optimizing the lubrication effect.

[0028] In one embodiment, the third contact protrusion 220 makes sliding contact with the middle portion of the cylindrical roller 300.

[0029] The above bearing optimizes the bearing design in view of comprehensive factors such as the service conditions and working environment of the bearing, and reduces part of the temperature rise of the bearing by reducing the friction of the bearing. Specifically, the cage plays a role of separating the rollers and mainly generates sliding friction. The above bearing reduces the frictional contact area between the cage and the cylindrical rollers by optimizing the cage structure, so as to achieve the purpose of reducing the amplitude of temperature rise of the bearing.

[0030] Refer to Figure 6 , in an embodiment, the radius of the cylindrical roller 300 is R1, and the maximum diameter of the avoiding recess 310 is R2, where R2=0.5R1. When the maximum radius of the third contact protrusion 220 is R3, R3 satisfies 0.6R1<R3<0.8R1. When the length of the cylindrical roller 300 is L1, and the dimension of the second contact protrusion 121 along the length direction of the cylindrical roller 300 is L2, the relationship 0.25L1<L2<0.4L1 is satisfied.

[0031] In the description of the present utility model, it should be understood that the orientation or positional relationships indicated by 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" and the like are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation on the present utility model.

[0032] Furthermore, the terms "first" and "second" are only used for descriptive purposes, and cannot be construed as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of the present utility model, the meaning of "a plurality of" is at least two, such as two, three and the like, unless otherwise clearly and specifically defined.

[0033] In the present utility model, unless otherwise clearly specified and limited, the terms "mounted", "connected", "joined", "fixed" and the like shall be understood in a broad sense, for example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection, or an electrical connection; it may be directly connected, or connected through an intermediate medium, and may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly defined. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present utility model according to specific situations.

[0034] In this invention, 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 through an intermediate medium. Furthermore, "above," "over," and "on top" of 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. It should be noted that when an element is referred to as "fixed to" or "set on" another element, it can be directly on the other element or there may be an intermediate element present. 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 intermediate element present. The terms "vertical," "horizontal," "above," "below," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible embodiments.

Claims

1. A square-headed riveting retainer, characterized in that: include The retainer includes a bottom seat ring and a plurality of pocket beams evenly spaced on the bottom seat ring. A first contact protrusion is provided on the bottom seat ring between two adjacent pocket beams. A second contact protrusion is provided on each of the pocket beams on both sides of the first contact protrusion. The end of the pocket beam away from the bottom seat ring is a square head riveted part. The retainer cover has multiple insertion holes that are riveted to the square head riveting part, and a third contact protrusion is provided between two adjacent insertion holes on the side of the retainer cover facing the bottom seat ring.

2. A square-head riveting retainer according to claim 1, characterized in that: The boundary line between the bottom seat ring and the pocket beam is an arc.

3. A square-head riveting retainer according to claim 1, characterized in that: The pocket of the cage formed by riveting the cage seat and the cage cover is partially cylindrical.

4. A square-head riveting retainer according to claim 1, characterized in that: The square-head riveting part includes four mutually enclosing curved surfaces.

5. A bearing, characterized in that: The invention includes a square-head rivet retainer as described in any one of claims 1-4 and a plurality of cylindrical rollers; each of the cylindrical rollers has a clearance recess on both ends, the outer portion of the clearance recess on one end face slides in contact with the first contact protrusion, the outer portion of the clearance recess on the other end face slides in contact with the third contact protrusion, and a portion of the side surface of the cylindrical roller slides in contact with the second contact protrusion.

6. A bearing according to claim 5, characterized in that: The depth and diameter of the clearance recesses on both ends of the cylindrical roller are the same.

7. A bearing according to claim 5, characterized in that: The sidewall of the avoidance recess forms an obtuse angle with the bottom surface of the avoidance recess.

8. A bearing according to claim 5, characterized in that: The third contact protrusion makes sliding contact with the middle part of the cylindrical roller.

9. A bearing according to claim 5, characterized in that: The radius of the cylindrical roller is R1, and the maximum diameter of the clearance recess is R2, then R2 = 0.5R1; when the maximum radius of the third contact protrusion is R3, then R3 satisfies 0.6R1. <R3<0.8R1。 10. A bearing according to claim 5, characterized in that: When the length of the cylindrical roller is L1 and the dimension of the second contact protrusion along the length direction of the cylindrical roller is L2, it satisfies 0.25L1. <L2<0.4L1。

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