Novel sealing self-aligning ball bearing

Abstract

The utility model relates to a novel sealing self-aligning ball bearing, which mainly relates to the structural design of a narrow-series sealing type double-row self-aligning ball bearing, and adopts the following structural improvements: an outer convex framework sealing ring structure consisting of an outer sealing ring and an inner sealing ring is adopted, the outer sealing ring consists of an outer sealing framework and an outer sealing lip which are arranged on an outer ring, and the inner sealing ring consists of an inner sealing ring and an outer sealing lip which are arranged on an outer ring; the outer sealing ring is composed of an outer sealing framework and an outer sealing lip, the inner sealing ring is composed of an inner sealing framework and an inner sealing lip, the inner sealing framework and the inner sealing lip are installed on the inner ring, and the contact position of the outer sealing framework and the inner sealing lip and the contact position of the inner sealing framework and the outer sealing lip are located on spherical surfaces with different diameters with the center of the self-aligning ball bearing as the circle center. More lubricating grease is stored in the bearing, so that the maintenance-free period of the bearing is prolonged; secondly, the elastic sealing lip is in contact with the metal framework, the sealing effect is good, meanwhile, the mutual contact position is a spherical surface with the center of the bearing as the circle center, the self-aligning function of the bearing can be achieved, and the self-aligning angle of the bearing can be increased.

Description

Technical Field

[0001] The utility model relates to the technical field of structural design of self-aligning ball bearings, in particular to a novel sealed self-aligning ball bearing, in particular to the structural design of a narrow series sealed double-row self-aligning ball bearing. Background Art

[0002] Sealed bearings are the development trend of open bearings. Sealed bearings have the advantages of long-term maintenance-free, high stability, low operating costs, and clean environment. In recent years, spherical roller bearings have gradually realized full-series seal upgrades, which can achieve long-life maintenance-free under all working conditions. Self-aligning ball bearings are also gradually realizing seal upgrades. Compared with other types of rolling bearings, self-aligning ball bearings have the lowest friction and can be used in applications with high requirements for low friction. Compared with spherical roller bearings, self-aligning ball bearings have narrower widths and higher speeds. Therefore, they can be used in applications with low friction, high load, high speed, and misalignment errors between the shaft and the bearing seat. For 12 and 13 series self-aligning ball bearings, the bearing itself is narrower in width, and the steel ball is allowed to protrude from the bearing end face. For this series of bearings, the installation of seals becomes particularly difficult. In addition, for most bearing seat end covers, the cavity formed between the end cover and the bearing end face is large, and this space is not used. This structure can use the end cover cavity to add double-layer seals to narrow series bearings, improve sealing performance, store more grease inside the bearing, and increase the maintenance-free period of the bearing. Traditional self-aligning deep groove ball bearings are equipped with seals, and the seals occupy the space of the bearing rolling components, reducing the bearing's load-bearing capacity. This new seal structure does not occupy the internal space of the bearing, so it has no effect on the bearing's load-bearing capacity. Utility Model Content

[0003] In order to solve the above technical problems, the purpose of the utility model is to provide a new type of sealed self-aligning ball bearing.

[0004] The technical solution adopted by the utility model is: a novel sealed self-aligning ball bearing, comprising an outer ring, an inner ring, a retaining frame, a rolling element and a sealing assembly, wherein the sealing assembly adopts an outer convex skeleton sealing ring composed of an outer sealing ring and an inner sealing ring, wherein the outer sealing ring is composed of an outer sealing skeleton installed on the outer ring and an outer sealing lip connected to the outer sealing skeleton and made of elastic material, wherein the inner sealing ring is composed of an inner sealing skeleton installed on the inner ring and an inner sealing lip connected to the inner sealing skeleton and made of elastic material, wherein the position where the outer sealing skeleton contacts the inner sealing lip and the position where the inner sealing skeleton contacts the outer sealing lip are on spherical surfaces of different diameters with the center of the self-aligning ball bearing as the center of the circle.

[0005] As a preferred solution, the outwardly convex skeleton sealing ring is symmetrically installed on the two side surfaces of the self-aligning ball bearing.

[0006] As a preferred embodiment, the outer sealing ring has one end of an outer sealing frame fixedly mounted in the end face groove of the outer ring and the other end bent toward a side away from the rolling element, an outer sealing lip being connected to the bent end and in contact with the outer side surface of the inner sealing frame.

[0007] As a preferred solution, the outer sealing frame is made of a high-rigidity metal frame, and the outer sealing lip is made of rubber.

[0008] As a preferred embodiment, the inner sealing ring has one end of an inner sealing frame fixedly mounted in the end face groove of the inner ring and the other end bent toward a side away from the rolling element, an inner sealing lip being connected to the bent end and in contact with the inner side surface of the outer sealing frame.

[0009] As a preferred solution, the inner sealing frame is made of a high-rigidity metal frame, and the inner sealing lip is made of rubber.

[0010] As a preferred solution, the outer sealing lip and the inner sealing lip are pressed down to a certain extent when in contact with the corresponding sealing frame, so as to ensure that the sealing lip is tightly matched with the corresponding sealing frame.

[0011] The beneficial effects of the utility model are:

[0012] Based on the defects of the prior art, the present application provides a new type of sealed self-aligning ball bearing, which mainly relates to the structural design of a narrow series sealed double-row self-aligning ball bearing. The present solution makes the following structural improvements: an outer convex skeleton sealing ring structure composed of an outer sealing ring and an inner sealing ring is adopted, the outer sealing ring is composed of an outer sealing skeleton and an outer sealing lip, and the inner sealing ring is composed of an inner sealing skeleton and an inner sealing lip, wherein the position where the outer sealing skeleton contacts the inner sealing lip and the position where the inner sealing skeleton contacts the outer sealing lip are on spherical surfaces of different diameters with the center of the self-aligning ball bearing as the center. By implementing the above structure, firstly, more grease is stored inside the bearing, thereby increasing the maintenance-free period of the bearing; secondly, the sealing lip having elasticity contacts the metal skeleton, which has a better sealing effect, and the position where they contact each other is a spherical surface with the center of the bearing as the center, which can realize the self-aligning function of the bearing and increase the self-aligning angle of the bearing;

[0013] Furthermore, the contact positions of the two sealing lips are located in spherical surfaces of different diameters, so that the self-aligning ball bearing has a certain adjustment margin. At the same time, the new sealing structure does not occupy the internal space of the bearing and therefore has no effect on the bearing capacity. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the structure of the outward convex skeleton sealing ring in the utility model;

[0017] Figure 3 It is a structural schematic diagram of the utility model in a specific implementation state.

[0018] Reference numerals: 1, inner sealing ring, 11, inner sealing frame, 12, inner sealing lip, 2,

[0019] Outer sealing ring, 21, outer sealing frame, 22, outer sealing lip, 3, outer ring, 4, retaining frame, 5, rolling element, 6, inner ring. DETAILED DESCRIPTION

[0020] The present invention is described in detail below by way of exemplary embodiments. However, it should be understood that, without further description, elements, structures and features in one embodiment may also be beneficially combined in other embodiments.

[0021] It should be noted that: unless otherwise defined, the technical terms or scientific terms used in this document shall have the usual meanings understood by people with ordinary skills in the field to which the utility model belongs. The words "one", "an" or "the" and the like used in the patent application specification and claims of the utility model do not express quantitative limitations, but indicate the existence of at least one. The words "include" or "comprise" and the like indicate that the elements or objects appearing before "include" or "comprises" include the elements or objects listed after "include" or "comprises" and their equivalents, but do not exclude other elements or objects with the same function.

[0022] Embodiment 1

[0023] In order to more clearly describe the specific structural composition of the new sealed self-aligning ball bearing, Figure 1-3 Describe this embodiment:

[0024] like Figure 1As shown, a novel sealed self-aligning ball bearing mainly comprises an outer ring 3, an inner ring 6, a retaining frame 4, a rolling element 5 and a sealing assembly, wherein the sealing assembly is an outward convex skeleton sealing ring structure composed of an outer sealing ring 2 and an inner sealing ring 1, and mounting grooves for fixing corresponding sealing rings are provided on the outer ring 3 and the inner ring 6, and the outer sealing ring 2 is composed of an outer sealing skeleton 21 and an outer sealing lip 22, wherein one end of the outer sealing skeleton 21 is fixedly installed in the groove of the outer ring 3, and the other end of the outer sealing skeleton 21 is connected to the outer sealing lip 22, and the outer sealing lip 22 is made of a material with elastic deformation ability; the inner sealing ring 1 is composed of an inner sealing skeleton 11 and an inner sealing lip 12, wherein one end of the inner sealing skeleton 11 is fixedly installed in the groove of the inner ring 6, and the other end of the inner sealing skeleton 11 is connected to the inner sealing lip 12, and the inner sealing lip 12 is also made of a material with elastic deformation ability.

[0025] As shown in the figure, the position where the outer sealing skeleton 21 contacts the inner sealing lip 12 is on a spherical surface with the center of the self-aligning ball bearing as the center, which is used for bearing alignment. The position where the inner sealing skeleton 11 contacts the outer sealing lip 22 is on a spherical surface with the center of the self-aligning ball bearing as the center, which is used for bearing alignment. Among them, the position where the outer sealing skeleton 21 contacts the inner sealing lip 12 and the position where the inner sealing skeleton 11 contacts the outer sealing lip 22 are on spherical surfaces of different diameters. Figure 2 The right side in the middle is a partial enlarged schematic diagram of point A, from which we can see that there is a certain distance between the outer sealing lip 22 and the inner sealing lip 12, so that the self-aligning ball bearing has a certain adjustment margin.

[0026] like Figure 3 As shown in the figure, in most bearing seat end covers, the cavity formed between the end cover and the bearing end face is large, and this space is not utilized. This structure can utilize the end cover cavity to add double-layer seals to narrow series bearings, improve sealing performance, store more grease inside the bearing, and increase the maintenance-free period of the bearing.

[0027] In this embodiment, the outwardly convex skeleton sealing ring is symmetrically installed on the two side surfaces of the self-aligning ball bearing.

[0028] In this embodiment, the outer sealing ring 2, wherein one end of the outer sealing skeleton 21 is fixedly mounted in the end face groove of the outer ring 3, and the other end is bent toward the side away from the rolling element 5, and an outer sealing lip 22 is connected to the bent end, and the outer sealing lip 22 contacts the outer side surface of the inner sealing skeleton 11.

[0029] In this embodiment, the outer sealing frame 21 is made of a high-rigidity metal frame, and the outer sealing lip 22 is made of rubber.

[0030] In this embodiment, the inner sealing ring 1, wherein one end of the inner sealing skeleton 11 is fixedly mounted in the end face groove of the inner ring 6, and the other end is bent toward the side away from the rolling element 5, and an inner sealing lip 12 is connected to the bent end, and the inner sealing lip 12 contacts the inner side surface of the outer sealing skeleton 21.

[0031] In this embodiment, the inner sealing frame 11 is made of a high-rigidity metal frame, and the inner sealing lip 12 is made of rubber.

[0032] In this embodiment, Figure 2 It can be clearly seen that the outer sealing lip 22 and the inner sealing lip 12 have a certain amount of depression when in contact with the corresponding sealing frame, so as to ensure that the sealing lip is tightly matched with the corresponding sealing frame.

[0033] The parts not described in detail in this embodiment are prior art.

[0034] It should be noted that although the utility model is described through the above embodiments, the utility model can also have other multiple embodiments. Without departing from the spirit and scope of the utility model, it is obvious that those skilled in the art can make various corresponding changes and deformations to the utility model, but these changes and deformations should all fall within the scope of protection of the attached claims of the utility model and their equivalents.

Claims

1. A new type of sealed self-aligning ball bearing, comprising an outer ring, an inner ring, a cage, a rolling element and a sealing assembly, characterized in that: The sealing assembly adopts an outward convex skeleton sealing ring composed of an outer sealing ring and an inner sealing ring, wherein the outer sealing ring is composed of an outer sealing skeleton installed on the outer ring and an outer sealing lip made of elastic material connected to the outer sealing skeleton, and the inner sealing ring is composed of an inner sealing skeleton installed on the inner ring and an inner sealing lip made of elastic material connected to the inner sealing skeleton, wherein the position where the outer sealing skeleton contacts the inner sealing lip and the position where the inner sealing skeleton contacts the outer sealing lip are on spherical surfaces of different diameters with the center of the self-aligning ball bearing as the center.

2. A new sealed self-aligning ball bearing according to claim 1, characterized in that: The outwardly convex skeleton sealing ring is symmetrically installed on the two side surfaces of the self-aligning ball bearing.

3. A new sealed self-aligning ball bearing according to claim 1, characterized in that: The outer sealing ring has one end of an outer sealing frame fixedly mounted in the end face groove of the outer ring and the other end bent toward a side away from the rolling element. An outer sealing lip is connected to the bent end and contacts the outer side surface of the inner sealing frame.

4. A new sealed self-aligning ball bearing according to claim 3, characterized in that: The outer sealing frame is made of a high-rigidity metal frame, and the outer sealing lip is made of rubber material.

5. The new sealed self-aligning ball bearing according to claim 1 is characterized in that: The inner sealing ring has one end of an inner sealing frame fixedly mounted in the end face groove of the inner ring and the other end bent toward a side away from the rolling element. An inner sealing lip is connected to the bent end and contacts the inner side surface of the outer sealing frame.

6. A new sealed self-aligning ball bearing according to claim 5, characterized in that: The inner sealing frame is made of a high-rigidity metal frame, and the inner sealing lip is made of rubber material.

7. A new sealed self-aligning ball bearing according to claim 3 or 5, characterized in that: The outer sealing lip and the inner sealing lip are pressed down to a certain extent when in contact with the sealing frame they match, so as to ensure that the sealing lip and the corresponding sealing frame are closely matched.

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