Tapered roller bearing and retainer thereof

Abstract

The utility model relates to the technical field of tapered roller bearings, in particular to a tapered roller bearing and a retainer thereof, a single retainer is provided with an inner diameter surface and an outer diameter surface which are opposite to each other, and two pockets penetrating through the inner diameter surface and the outer diameter surface are formed in the single retainer; the four supporting parts are arranged on the inner diameter surface and distributed at the positions close to the four vertex angles of the inner diameter surface. The two side limiting convex parts are arranged on the outer diameter surface and are arranged on the two sides of the outer diameter surface in the circumferential direction respectively, and first arc surfaces are arranged on the sides, close to the pockets, of the side limiting convex parts; the middle limiting convex part is arranged on the outer diameter surface, the middle limiting convex part is arranged between the two pocket holes, and second arc surfaces are arranged on the two sides of the middle limiting convex part; the utility model provides the tapered roller bearing and the retainer thereof, the tapered roller bearing and the retainer thereof are easier to disassemble, assemble and maintain, only damaged parts need to be replaced after the tapered roller bearing is damaged, and the tapered roller bearing and the retainer thereof are flexible and convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of tapered roller bearings, in particular to a tapered roller bearing and a retaining frame thereof. Background Art

[0002] A bearing is a mechanical element that limits relative motion to a desired range of motion and reduces friction between moving parts. A cage, also known as a bearing retainer, is a bearing component that wraps all or part of the rolling elements and moves with them to isolate the rolling elements and usually guide and retain them in the bearing. A tapered roller bearing is usually equipped with a cage to guide the tapered rollers.

[0003] However, in the prior art, the retainers used for tapered roller bearings are mostly integral structures, and the materials are mostly metal materials. Such integral structures are often heavy and difficult to process. They must be replaced as a whole after damage, which is inconvenient to disassemble and has a high replacement cost. Utility Model Content

[0004] In view of the defects of the prior art, the utility model provides a tapered roller bearing and a retainer thereof, which are easier to disassemble and maintain. After damage, only the broken part needs to be replaced, which is flexible and convenient.

[0005] In order to achieve the above-mentioned purpose, the technical solution provided by the utility model is a retaining frame for a tapered roller bearing, which includes a single-body retaining frame, four supporting parts, two side limiting protrusions and an intermediate limiting protrusion; the single-body retaining frame has an inner diameter surface and an outer diameter surface opposite to each other, and the single-body retaining frame is provided with two pockets penetrating the inner diameter surface and the outer diameter surface; four supporting parts are arranged on the inner diameter surface, and are distributed at positions close to the four vertex corners of the inner diameter surface; two side limiting protrusions are arranged on the outer diameter surface, and are respectively arranged on both sides of the outer diameter surface in the circumferential direction, and the side of the side limiting protrusion close to the pocket hole has a first arc surface; the intermediate limiting protrusion is arranged on the outer diameter surface, and the intermediate limiting protrusion is arranged between the two pocket holes, and second arc surfaces are arranged on both sides of the intermediate limiting protrusion; the first arc surface and the second arc surface and their corresponding pocket holes form a space for mounting rolling elements.

[0006] Furthermore, the single body retaining frame, the supporting portion, the side limiting protrusions and the middle limiting protrusions are integrally formed.

[0007] Furthermore, the pocket has a first plane and a second plane facing each other, the first plane is connected with the first arc surface and transitions smoothly, and the second plane is connected with the second arc surface and transitions smoothly.

[0008] Furthermore, the axial length of the side limiting protrusion is smaller than the axial length of the pocket.

[0009] A tapered roller bearing comprises the above-mentioned retaining rack for the tapered roller bearing.

[0010] Beneficial effects of the utility model: The utility model is a split structure, and the outer diameter surface of each single retainer is provided with two side limiting convex parts and one middle limiting convex part, forming two arc-shaped pocket holes, and the two pocket holes form a group, which is easier to disassemble and maintain. After damage, only the broken part needs to be replaced, which is flexible and convenient. The inner diameter surface of each single retainer is provided with four supporting parts, so that the retainer for the tapered roller bearing has a supporting function; the supporting parts play a limiting role, preventing the retainer for the tapered roller bearing from being displaced when the bearing is running. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic structural diagram of a retainer for a tapered roller bearing in one embodiment of the utility model;

[0012] Figure 2 It is a front view of a retainer for a tapered roller bearing in one embodiment of the utility model;

[0013] Figure 3 This is a schematic structural diagram of a tapered roller bearing in one embodiment of the utility model;

[0014] Figure 4 It is a partial enlarged view of a tapered roller bearing in one embodiment of the utility model;

[0015] Figure 5 It is a partial enlarged view of another angle of a tapered roller bearing in one embodiment of the utility model;

[0016] Figure 6 It is a partial enlarged view of a retainer for a tapered roller bearing in one embodiment of the utility model;

[0017] In the figure:

[0018] 10. Cage for tapered roller bearings,

[0019] 100, single-body retainer, 110, inner diameter surface, 120, outer diameter surface, 130, pocket, 131, first plane, 132, second plane,

[0020] 200, support part,

[0021] 300, side limiting convex portion, 310, first arc surface,

[0022] 400, middle limiting convex portion, 410, second arc surface,

[0023] a. Space for rolling elements. DETAILED DESCRIPTION

[0024] 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.

[0025] See also Figure 1 and Figure 2 , a schematic structural diagram of a tapered roller bearing retainer in one embodiment of the utility model, comprising a single retainer 100, four support portions 200, two side limiting convex portions 300 and a middle limiting convex portion 400; the single retainer 100 has an inner diameter surface 110 and an outer diameter surface 120 opposite to each other, and the single retainer 100 is provided with two pockets 130 penetrating the inner diameter surface 110 and the outer diameter surface 120; the four support portions 200 are arranged on the inner diameter surface 110, and are distributed at positions close to the four vertex corners of the inner diameter surface 110. The two side limiting protrusions 300 are arranged on the outer diameter surface 120, and are respectively arranged on both sides of the outer diameter surface 120 in the circumferential direction. The side of the side limiting protrusion 300 close to the pocket 130 has a first arc surface 310; the middle limiting protrusion 400 is arranged on the outer diameter surface 120, and the middle limiting protrusion 400 is arranged between the two pockets 130. The two sides of the middle limiting protrusion 400 are provided with second arc surfaces 410; the first arc surface 310 and the second arc surface 410 and their corresponding pockets 130 form a space a for mounting rolling elements.

[0026] The retainer for the tapered roller bearing is a split structure. The outer diameter surface 120 of each single retainer 100 is provided with two side limiting protrusions 300 and one middle limiting protrusion 400, forming two arc-shaped pockets 130. The two pockets 130 form a group, which is easier to disassemble and maintain. After damage, only the damaged part needs to be replaced, which is flexible and convenient. In essence, each single retainer 100 can provide two and a half spaces for mounting rolling elements. It should be noted that half of the space for mounting rolling elements can form a space for mounting rolling elements together with the adjacent retainer 100, thereby improving the utilization rate of the single retainer 100. Such a setting can not only realize independent maintenance and replacement, but also avoid excessive number of single retainer modules affecting the operation of the bearing. On the other hand, the inner diameter surface 110 of each single retaining frame 100 is provided with four supporting parts 200, and the end of the supporting part 200 contacts the inner ring of the bearing, so that the retaining frame 10 for the tapered roller bearing has a supporting function; the supporting part 200 plays a limiting role to prevent the retaining frame 10 for the tapered roller bearing from being displaced when the bearing is running. The four supporting parts 200 are provided, that is, the four-point support is adopted, the force is more uniform, and the operation is more reliable.

[0027] In order to meet the application requirements of weight reduction and cost reduction, in one embodiment, the retainer for tapered roller bearings is injection molded with high-strength engineering plastics. The retainer for tapered roller bearings adopts non-metallic materials on the basis of a split structure, which can reduce the weight of the bearing retainer to a certain extent, and the non-metallic materials can be injection molded by molds, and the production efficiency is greatly improved. In this way, the strength of the retainer can be guaranteed while reducing the weight. In addition, the surface of the retainer rolling element is a point contact design, which can better ensure the operation of the rolling element.

[0028] In one embodiment, the single retainer 100, four support portions 200, two side limiting protrusions 300 and the middle limiting protrusion 400 are integrally formed. The integral forming method includes but is not limited to injection molding, which can reduce the number of connectors and increase the reliability of the retainer for the tapered roller bearing.

[0029] In one embodiment, the pocket 130 has a first plane 131 and a second plane 132 facing each other. The first plane 131 is connected to and smoothly transitions with the first arc surface 310 , and the second plane 132 is connected to and smoothly transitions with the second arc surface 410 .

[0030] In one embodiment, the axial length of the side limiting protrusion 300 is smaller than the axial length of the pocket 130 .

[0031] See also Figure 3-Figure 6, shows a schematic structural diagram of a tapered roller bearing in an embodiment of the utility model, which includes the above-mentioned tapered roller bearing retainer 10. The tapered roller bearing retainer 10 includes a plurality of single retainers 100, and there is no connection between adjacent single retainers 100, but the side limiting protrusions 300 of adjacent single retainers 100 close to each other form a space for mounting rolling elements.

[0032] The above-mentioned tapered roller bearing includes a plurality of single retaining frames 100, which are easier to disassemble and maintain. After damage, only the damaged part needs to be replaced, which is flexible and convenient.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] In the present utility model, unless otherwise clearly specified and limited, the first feature "above" or "below" the second feature may be 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, the first feature "above", "above" and "above" the second feature may be that the first feature is directly above or obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature "below", "below" and "below" the second feature may be that the first feature is directly below or obliquely below the second feature, or simply indicates that the first feature is lower in 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 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", "up", "down", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

Claims

1. A retainer for a tapered roller bearing, characterized in that: include A single-body retainer having an inner diameter surface and an outer diameter surface opposite to each other, wherein the single-body retainer is provided with two pockets penetrating the inner diameter surface and the outer diameter surface; Four support portions are arranged on the inner diameter surface and distributed at positions close to four vertex corners of the inner diameter surface; Two side limiting protrusions are arranged on the outer diameter surface and are respectively arranged on both sides of the outer diameter surface in the circumferential direction, and the side of the side limiting protrusion close to the pocket hole has a first arc surface; An intermediate limiting convex portion is arranged on the outer diameter surface, the intermediate limiting convex portion is arranged between the two pocket holes, and second arc surfaces are arranged on both sides of the intermediate limiting convex portion; The first arc surface, the second arc surface and the corresponding pockets form a space for accommodating rolling elements.

2. A retainer for a tapered roller bearing according to claim 1, characterized in that: The single body retaining frame, the supporting portion, the side limiting convex portion and the middle limiting convex portion are integrally formed.

3. A retainer for a tapered roller bearing according to claim 1 or 2, characterized in that: The pocket has a first plane and a second plane facing each other, the first plane is connected with the first arc surface and transitions smoothly, and the second plane is connected with the second arc surface and transitions smoothly.

4. A retainer for a tapered roller bearing according to claim 1 or 2, characterized in that: The axial length of the side limiting protrusion is smaller than the axial length of the pocket.

5. A retainer for a tapered roller bearing according to claim 4, characterized in that: The axial length of the side limiting protrusion is equal to the axial length of the middle limiting protrusion.

6. A tapered roller bearing, characterized in that: A retainer for a tapered roller bearing comprising the retainer as claimed in claim 1 or 2.

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