Combined bearing with good sealing effect

Abstract

The utility model provides a combined bearing with a good sealing effect, and belongs to the technical field of bearings. The problem that an existing bearing is poor in sealing performance is solved. The combined bearing with the good sealing effect comprises a bearing body, the bearing body is composed of an inner ring, an outer ring, a retainer and a rolling body, a mounting cavity for mounting the retainer and the rolling body is formed between the inner ring and the outer ring, and sealing units for enhancing the sealing effect are arranged on the two end faces of the bearing body. And an assembling unit which is connected with the inner ring, is matched with the sealing unit and forms a multi-layer sealing structure is arranged on the outer peripheral wall of the inner ring. The sealing structure has the advantage of being good in sealing performance.

Description

Technical Field

[0001] The utility model belongs to the technical field of bearings and relates to a combined bearing with good sealing effect. Background Technique

[0002] Bearings are precision parts, so they need maintenance. However, in actual use, due to the complex working environment, 70% of their premature failures are caused by impurities entering the bearing interior, resulting in abnormal wear of the raceway or poor rotation. At the same time, the bearing seal ring is made of rubber, which is soft and prone to deformation and aging. After deformation, the sealing effect of the seal ring is poor, and it is easy to fall off after continuous stress, resulting in poor bearing sealing and premature failure, thus reducing the service life. Summary of the Invention

[0003] The purpose of the utility model is to provide a combined bearing with better sealing performance for the above problems existing in the prior art.

[0004] The purpose of the utility model can be achieved by the following technical solutions: A combined bearing with good sealing effect, including a bearing body, which is composed of an inner ring, an outer ring, a cage and rolling elements, and an installation cavity for installing the cage and rolling elements is formed between the inner ring and the outer ring. The characteristic is that sealing units for enhancing the sealing effect are arranged on both end faces of the bearing body, and an assembly unit is arranged on the outer peripheral wall of the inner ring, which is connected with the inner ring, cooperates with the sealing unit, and forms a multi-layer sealing structure.

[0005] In the above-mentioned combined bearing with good sealing effect, the outer wall of the inner ring is arranged in a multi-stage stepped structure.

[0006] In the above-mentioned combined bearing with good sealing effect, the assembly unit is composed of a fitting sleeve and a limiting ring plate. The fitting sleeve is sleeved on the inner ring and connected with it, and one end of the fitting sleeve abuts against the stepped surface of the inner ring. The limiting ring plate is arranged on the left end face of the inner ring and connected with it, and the other end of the fitting sleeve abuts against the limiting ring plate.

[0007] In the above-mentioned combined bearing with good sealing effect, the limiting ring plate is provided with a contact protrusion that axially protrudes outward and abuts against the fitting sleeve on the inner end face of the installation cavity, and a first convex ring part that radially protrudes outward and cooperates with the sealing unit is arranged on the outer peripheral wall of the contact protrusion.

[0008] In the above-mentioned combined bearing with good sealing effect, a second convex ring that radially protrudes outward and abuts against the above-mentioned cage is arranged on the outer peripheral wall of the fitting sleeve.

[0009] In the above-mentioned combined bearing with good sealing effect, the sealing unit is composed of an outer ring frame and an inner ring frame, the vertical section of the outer ring frame is two symmetrically arranged L-shaped structures, the vertical section of the inner ring frame is two symmetrically arranged T-shaped structures, the outer ring frame is sleeved on the inner ring frame, and the inner ring frame is sleeved on the limiting ring plate, and the above-mentioned outer ring frame is in contact with the inner wall of the outer ring through the inner ring frame.

[0010] Compared with the prior art, the combined bearing with good sealing effect has the following advantages:

[0011] 1. Sealing units for enhancing the sealing effect are arranged on both end faces of the bearing body. An assembly unit connected to the inner ring and cooperating with the sealing unit to form a multi-layer sealing structure is arranged on the outer peripheral wall of the inner ring. The arrangement of the above structure enables it to have better sealing performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of the cutaway part of this combined bearing with good sealing effect.

[0013] In the figure, 1, inner ring; 2, outer ring; 3, retaining frame; 4, rolling element; 5, assembly set; 6, limiting ring plate; 7, abutment protrusion; 8, convex ring part 1; 9, convex ring part 2; 10, outer ring frame; 11, inner ring frame. DETAILED DESCRIPTION

[0014] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0015] like Figure 1As shown in the figure, the combined bearing with good sealing effect includes a bearing body, which is composed of an inner ring 1, an outer ring 2, a cage 3 and rolling elements 4. An installation cavity for installing the cage 3 and the rolling elements 4 is formed between the inner ring 1 and the outer ring 2. Sealing units for enhancing the sealing effect are provided on both end faces of the bearing body. An assembly unit, which is connected to the outer peripheral wall of the inner ring 1, cooperates with the sealing unit and forms a multi-layer sealing structure, is composed of a mounting sleeve 5 and a limit ring plate 6. The mounting sleeve 5 is sleeved on the inner ring 1 and connected to it, and one end of the mounting sleeve 5 abuts against the stepped surface of the inner ring 1. The limit ring plate 6 is provided on the left end face of the inner ring 1 and connected to it. The other end of the above-mentioned mounting sleeve 5 abuts against the limit ring plate 6, and the mounting sleeve 5 can be connected to the inner ring 1 through several stud bolts. A contact protrusion 7, which axially protrudes outward and abuts against the mounting sleeve 5, is provided on the inner end face of the limit ring plate located in the installation cavity. A first convex ring portion 8, which radially protrudes outward and cooperates with the sealing unit, is provided on the outer peripheral wall of the contact protrusion 7, and the first convex ring portion 8 can be slidably fitted with the cage 3. A second convex ring 9, which radially protrudes outward and abuts against the above-mentioned cage 3, is provided on the outer peripheral wall of the mounting sleeve 5. The sealing unit is composed of an outer ring frame 10 and an inner ring frame 11. The vertical cross-section of the outer ring frame 10 is in the shape of two symmetrically arranged L-shaped structures, and the vertical cross-section of the inner ring frame 11 is in the shape of two symmetrically arranged T-shaped structures. The outer ring frame 10 is sleeved on the inner ring frame 11, and the inner ring frame 11 is sleeved on the limit ring plate 6. And the outer and inner ring frames 10 are located outside the corresponding first convex ring portion 8 and the second convex ring portion. The above-mentioned outer ring frame 10 abuts and fits against the inner wall of the outer ring 2 through the inner ring frame 11, and there is a gap between the outer ring frame 10 and the inner ring 1 through the inner ring frame 11. A sealing gasket can be provided between the outer ring frame 10 and the inner ring frame 11, and a sealing gasket can also be provided between the inner ring frame 11 and the relative first convex ring portion 8 and the second convex ring portion. The vertical cross-section of the sealing gasket is in the shape of two symmetrically arranged L-shaped structures. A rubber ring can be sleeved on the end where the inner ring frame 11 abuts against the inner end.

[0016] As a preferred structure, the outer wall of the inner ring 1 is arranged in a multi-stage stepped structure.

[0017] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Those skilled in the art to which the present invention pertains can make various modifications or supplements to the described specific embodiments or use similar ways to replace them, but will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0018] Although terms such as inner ring 1, outer ring 2, cage 3, rolling element 4, fitting sleeve 5, limiting ring plate 6, abutting projection 7, first convex ring portion 8, second convex ring 9, outer ring frame 10, inner ring frame 11, etc. are used more frequently in this text, the possibility of using other terms is not excluded. The use of these terms is only for more convenient description and explanation of the essence of the present utility model; interpreting them as any additional limitation is contrary to the spirit of the present utility model.

Claims

1. A combined bearing with good sealing effect, comprising a bearing body, the bearing body comprising an inner ring (1), an outer ring (2), a retaining frame (3) and rolling elements (4), and a mounting cavity for mounting the retaining frame (3) and the rolling elements (4) is formed between the inner ring (1) and the outer ring (2), characterized in that: Sealing units for enhancing the sealing effect are arranged on both end surfaces of the bearing body. An assembly unit connected to the inner ring (1) and cooperating with the sealing unit to form a multi-layer sealing structure is arranged on the outer peripheral wall of the inner ring (1). The assembly unit is composed of an assembly sleeve (5) and a limiting ring plate (6). The assembly sleeve (5) is sleeved on the inner ring (1) and connected to the inner ring (1), and one end of the assembly sleeve (5) is in contact with the stepped surface of the inner ring (1). The limiting ring plate (6) is arranged on the left end surface of the inner ring (1) and connected to the inner ring (1). The other end of the assembly sleeve (5) is in contact with the limiting ring plate (6), and the sealing unit is composed of an outer ring frame (10) and an inner ring frame (11). The vertical section of the outer ring frame (10) is two symmetrically arranged L-shaped structures, and the vertical section of the inner ring frame (11) is two symmetrically arranged T-shaped structures. The outer ring frame (10) is sleeved on the inner ring frame (11), and the inner ring frame (11) is sleeved on the limiting ring plate (6). The outer ring frame (10) is in contact with the inner wall of the outer ring (2) through the inner ring frame (11).

2. A combined bearing with good sealing effect according to claim 1, characterized in that: The outer wall of the inner ring (1) is arranged in a multi-step structure.

3. A combined bearing with good sealing effect according to claim 1, characterized in that: The inner end surface of the limiting ring plate (6) located in the installation cavity is provided with a resistance protrusion (7) which protrudes axially outward and abuts against the assembly sleeve (5), and the outer peripheral wall of the resistance protrusion (7) is provided with a convex ring portion (8) which protrudes radially outward and cooperates with the sealing unit.

4. A combined bearing with good sealing effect according to claim 1, characterized in that: The outer peripheral wall of the assembly sleeve (5) is provided with a second protruding ring (9) which protrudes radially outward and contacts the retaining frame (3).

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