Deep groove ball bearing for powder concentrator

Abstract

The utility model relates to a ball bearing, in particular to a deep groove ball bearing for a powder concentrator, which comprises an outer ring, an inner ring, a retainer unit and rolling bodies embedded in a plurality of pockets of a retainer, and the rolling bodies are arranged between an outer ring raceway and an inner ring raceway. Each retainer unit is of a symmetrical split type structure, a screw connecting hole axially penetrates through each split type retainer unit, grooves are formed in the positions close to the end faces of the two ends of each retainer unit respectively, and the two grooves are communicated with the screw connecting hole; the split type retainer units are connected together in a penetrating mode through screws in the screw connecting holes. According to the retainer for the deep groove ball bearing, the retainer structure is optimally designed, the two split retainer bodies are in through connection through the lengthened screws, and the reliability of the retainer for the deep groove ball bearing is greatly enhanced through two-time tightening fixation and one-time welding fixation; rotational inertia caused by overhigh rotating speed and the condition of retainer loosening caused by impact load of equipment are prevented, and the overall rigidity and reliability of the bearing are improved.

Description

Technical Field

[0001] The utility model relates to a ball bearing, in particular to a deep groove ball bearing for a powder selecting machine, and belongs to the technical field of bearings. Background Art

[0002] The working conditions of the powder classifier are relatively harsh, usually with high speed, heavy load, and impact vibration. The main shaft of the powder classifier adopts deep groove ball bearings to withstand the radial force in the working conditions. When the material enters the vibration system, the whole machine is subject to very large impact and vibration loads, and in the subsequent sorting process, the speed is usually very high. Therefore, high requirements are placed on the main bearings of the powder classifier. Usually, this deep groove ball bearing adopts a two-half copper cage connected by screws, but due to the high speed of the working conditions and the large impact and vibration load, the strength of the screw-fixed half cage is not enough, and the cage is easy to loosen, causing the bearing failure. Utility Model Content

[0003] In view of the technical problems existing in the deep groove ball bearings for powder classifiers mentioned above, the purpose of the utility model is to provide a deep groove ball bearing for powder classifiers. The retaining frame structure in this scheme enhances the operating reliability of the bearing in the equipment by tightening twice and welding once, compared with the traditional one-time tightening fixation.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a deep groove ball bearing for a powder selection machine, comprising: an outer ring, an inner ring, a cage unit and rolling bodies embedded in a plurality of pockets of the cage, wherein the rolling bodies are arranged between the outer ring raceway and the inner ring raceway; the cage unit is a symmetrical split structure, the split cage unit is axially penetrated by a screw connection hole, and grooves are respectively provided near the end surfaces of both ends of the cage unit, and the two grooves are connected to the screw connection hole; the screw connection hole is used to penetrate and connect the split cage unit together by screws;

[0005] Furthermore, the groove width of the groove is greater than the diameter of the screw connection hole;

[0006] The interior of the above-mentioned groove is used to accommodate the nut, and a locking washer can be added to the groove to fix it when necessary; the groove width and groove depth of the groove are determined by the specification size of the nut;

[0007] Furthermore, the screw is an elongated structure, and its length is not less than the width of the entire retaining frame unit;

[0008] Furthermore, the screw is a hexagon socket head screw.

[0009] Furthermore, the cage unit includes a cage seat and a cage cover, and the cage seat and the cage cover both include a screw connection hole area and a groove area; the screw connection hole area of ​​the cage seat is a light hole design, and the screw connection hole area of ​​the cage cover is a threaded hole design; this structural design method can improve its reliability;

[0010] Furthermore, the screw includes a nut end and a screw rod end, and the cage unit also includes a nut; when the cage unit is assembled, the screw rod end of the screw is inserted from the screw connection hole on one side of the cage seat, penetrates into the screw connection hole of the cage cover, and passes out of the screw connection hole of the cage cover to form an extension area in the groove of the cage cover; the nut is tightened on the extension area to fix it, so that the inner end of the nut is close to the bottom of the groove of the cage cover;

[0011] Furthermore, after the screw rod end is fixed with the nut, the end of the screw rod end extends out of the nut to form a protruding area.

[0012] The connection strength between the screw, nut and cage is enhanced by spot welding the protruding area;

[0013] Furthermore, the extension area is the distance from the outer edge of the nut to the end of the screw;

[0014] Furthermore, the protruding area is 2-3 mm.

[0015] Furthermore, the nut is an M16 hexagonal nut.

[0016] The connection position between the cage seat and the cage cover adopts a convex and concave key matching method, which is convenient for installation and alignment and quick installation.

[0017] The primary fixation in the above scheme of the utility model is to connect and fix the cage seat and the cage cover by screws; the secondary fixation is to tighten and fix the extended area of ​​the screw end of the screw in the groove of the cage cover by a nut; and the primary welding is spot welding of the extended area of ​​the screw end of the screw.

[0018] The beneficial effects of the technical solution of the deep groove ball bearing of the utility model are:

[0019] By optimizing the design of the cage structure, using extended screws to connect the two split frames, and fixing them twice with tightening and once with welding, the cage reliability of the deep groove ball bearing is greatly enhanced, preventing the cage from loosening due to the rotational inertia caused by excessive speed and the impact load of the equipment, thereby improving the overall stiffness and reliability of the bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The bearing structure diagram of the utility model.

[0021] Figure 2 for Figure 1 A partial enlarged view of .

[0022] In the figure, 1, outer ring, 2, inner ring, 3, rolling element, 4, groove, 5, screw, 6, cage seat, 7, cage cover, 6.1, smooth hole, 7.1, threaded hole, 8, nut, 9, protruding area. DETAILED DESCRIPTION

[0023] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model 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 utility model. However, the utility model 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 utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0024] like Figure 1 The deep groove ball bearing for powder selection machine shown in the figure comprises: an outer ring 1, an inner ring 2, a cage unit and rolling bodies 3 embedded in a plurality of pockets of the cage, wherein the rolling bodies 3 are arranged between the outer ring raceway and the inner ring raceway; the cage unit is a symmetrical split structure, wherein the split cage unit is axially penetrated with a screw connection hole, and grooves 4 are respectively provided near the end faces of both ends of the cage unit, and the two grooves 4 are connected with the screw connection holes; the screw connection holes are penetrated and connected together by screws 5; and the groove width of the groove 4 is greater than the diameter of the screw connection hole;

[0025] The interior of the groove 4 is used to accommodate the nut, and a locking washer can be added to the groove 4 for fixing when necessary; the groove width and groove depth of the groove 4 are determined by the specification size of the nut;

[0026] The screw 5 is an extended structure, and its length is not less than the width of the entire cage unit;

[0027] The cage unit includes a cage seat 6 and a cage cover 7, and the cage seat 6 and the cage cover 7 both include a screw connection hole area and a groove area; the screw connection hole area of ​​the cage seat 6 is designed as a light hole 6.1, and the screw connection hole area of ​​the cage cover 7 is designed as a threaded hole 7.1;

[0028] The screw 5 includes a nut end and a screw end, and the cage unit also includes a nut 8; when the cage unit is assembled, the screw end of the screw 5 is inserted from the screw connection hole on one side of the cage seat 6, penetrates into the screw connection hole of the cage cover 7 and passes out of the screw connection hole of the cage cover 7 to form an extension area in the groove 4 of the cage cover 7; the nut 8 is tightened on the extension area to fix it, so that the inner end of the nut 8 is close to the bottom of the groove 4 of the cage cover 7;

[0029] After the screw end of the screw 5 passes through the fixing nut 8, the end of the screw end extends out of the nut 8 to form a protruding area 9.

[0030] By spot welding the extended area 9, the connection strength between the screw 5, the nut 8 and the retainer is enhanced;

[0031] The extended area 9 is the distance from the outer edge of the nut 8 to the end of the screw;

[0032] The protruding area 9 is 2-3 mm.

[0033] In the present scheme, the connection position between the retainer seat 6 and the retainer cover 7 adopts a convex-concave key matching method; a convex portion is formed in the outer diameter direction of the retainer seat 6 or the retainer cover 7 (either one) as a convex key, and a concave portion is formed at the corresponding position of the other part, and the retainer seat 6 and the retainer cover 7 are assembled through the matching of the convex key and the concave portion; in this embodiment, a convex key is formed on the retainer cover 7, and a matching concave portion is formed on the retainer seat 6; and as other embodiments of the utility model, a convex key can be formed on the retainer seat 6.

[0034] The purpose of designing this technical solution is that the deep groove ball bearing in the powder classifier not only bears large radial forces but also strong radial impact loads and high speed conditions; therefore, the bearing retainer is optimized for this complex working condition.

[0035] 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 a limitation on the present invention.

[0036] 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 utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0037] 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.

[0038] In the present utility model, 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.

Claims

1. A deep groove ball bearing for a powder classifier, characterized in that: include: The outer ring, the inner ring, the cage unit and the rolling bodies embedded in the pockets of the cage, the rolling bodies are arranged between the outer ring raceway and the inner ring raceway; the cage unit is a symmetrical split structure, the split cage unit is axially penetrated by a screw connection hole, and grooves are respectively opened near the end faces of both ends of the cage unit, and the two grooves are connected with the screw connection holes; the screw connection holes are used to penetrate and connect the split cage units together; The groove width of the groove is greater than the diameter of the screw connection hole; The screw is an extended structure, and its length is not less than the width of the entire cage unit; The cage unit includes a cage seat and a cage cover, and the cage seat and the cage cover both include a screw connection hole area and a groove area; the screw connection hole area of ​​the cage seat is a smooth hole design, and the screw connection hole area of ​​the cage cover is a threaded hole design; The screw includes a nut end and a screw rod end, and the cage unit also includes a nut; the screw rod end of the screw is inserted into the screw connection hole on one side of the cage seat, penetrates into the screw connection hole of the cage cover, and passes out of the screw connection hole of the cage cover to form an extension area in the groove of the cage cover; the nut is fixed on the extension area by tightening the nut so that the inner end of the nut is close to the bottom of the groove of the cage cover; After the screw rod end of the screw passes through the fixing nut, the end of the screw rod end extends out of the nut to form an extended area, and the extended area is spot welded; The extended area is the distance from the outer edge of the nut to the end of the screw; the extended area is 2-3 mm.

2. A deep groove ball bearing for a powder classifier according to claim 1, characterized in that: The connection between the cage seat and the cage cover adopts a convex and concave key matching method.

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