Sealing belt and bearing

Abstract

The utility model belongs to the technical field of bearing sealing, and relates to a sealing belt and a bearing. The sealing tape comprises a sealing tape body, the sealing tape body comprises an insertion part and a sealing part which are of an integrated structure, and the sealing part comprises a transverse sealing lip extending in the direction of the insertion part and at least one longitudinal sealing lip arranged on the lower portion of the transverse sealing lip. The bearing comprises an outer ring, an inner ring and a rolling body arranged between the outer ring and the inner ring, the outer ring and the inner ring are arranged in a staggered mode in the axial direction, and the sealing belts are arranged on the upper portion and the lower portion of the butt joint position of the outer ring and the inner ring respectively. According to the utility model, the sealing part of the sealing tape adopts the double-lip sealing design, so that the sealing tape has better sealing performance, when the sealing tape is mounted on a bearing for use, two protections can be provided for the bearing, and the transverse sealing lip can block large particle pollution, so that the sealing tape is convenient to use. The longitudinal sealing lips can prevent external tiny pollutants or water from invading, and meanwhile, internal lubricating grease can be prevented from leaking out.

Description

Technical Field

[0001] The utility model relates to a sealing belt and a bearing, belonging to the technical field of bearing sealing. Background Art

[0002] The sealing belt is an important component of the bearing. When the outer ring and inner ring of the bearing rotate relative to each other, the main function of the sealing belt is to prevent the grease inside the bearing from leaking out and effectively block external dust, rainwater and other impurities from entering the bearing, thereby ensuring the normal operation of the bearing and extending its service life. In the field of engineering machinery such as automobile cranes, tower cranes, and excavators, bearings are widely used. However, since these machines often operate in harsh working environments, the leakage of grease inside the bearing and the invasion of impurities such as rainwater from the outside into the bearing have become particularly prominent, which has become an important problem that needs to be solved in the industry.

[0003] At present, the common bearing sealing belt designs on the market mostly use flat sealing surfaces, which achieve the sealing effect by closely fitting the inner and outer ring surfaces of the bearing. However, this design has gradually revealed many shortcomings during long-term use: on the one hand, the flat contact sealing method is difficult to completely eliminate the trace leakage of grease; on the other hand, as the service time increases, the aging, deformation or relaxation of the sealing belt material becomes increasingly significant, resulting in a decrease in the fit with the outer ring of the bearing, forming a gap, which in turn increases the risk of grease loss and penetration of external impurities. In addition, continuous rotational friction will accelerate the wear of the sealing surface, further weaken its sealing performance, and affect the overall performance of the bearing. What is more serious is that the problem of sealing belt falling off is common in the construction machinery industry, which not only increases the high after-sales and maintenance costs, but also seriously affects the normal operation of the equipment.

[0004] It should be noted that the above information disclosed in this background technology section is only for understanding the background technology of the present inventive concept, and therefore, it may contain information that does not constitute the prior art. Utility Model Content

[0005] The purpose of the utility model is to provide a new technical solution to improve or solve the technical problems existing in the prior art as described above.

[0006] The technical solution provided by the utility model is as follows: a sealing belt, including a sealing belt body, the sealing belt body includes an insertion part and a sealing part in an integrated structure, the sealing part includes a transverse sealing lip extending along the direction of the insertion part, and at least one longitudinal sealing lip arranged at the lower part of the transverse sealing lip.

[0007] Compared with the prior art, the technical solution provided by the utility model has the following beneficial effects: the utility model can ensure that the sealing belt has better sealing performance by adopting a double-lip sealing design for the sealing portion of the sealing belt. When the sealing belt is installed on the bearing for use, it can provide two layers of protection for the bearing. The transverse sealing lip can block large particle pollution, and the longitudinal sealing lip can block the invasion of external fine pollutants or water, while preventing the internal grease from leaking.

[0008] On the basis of the above technical solution, the present invention can also be improved as follows.

[0009] Furthermore, at least one sealing protrusion is provided on the sealing surface of the longitudinal sealing lip.

[0010] The beneficial effect of adopting the above further solution is that the grease inside the raceway can be prevented from overflowing and losing. Furthermore, the inserting portion is provided with barbs.

[0011] The beneficial effect of adopting the above further solution is that the friction between the sealing belt and the bearing can be enhanced, thereby reducing the possibility of the sealing belt falling off.

[0012] Furthermore, a step is provided between the inserting portion and the sealing portion.

[0013] The beneficial effect of adopting the above further solution is that the step can play a role in installation positioning and increasing the pressing force of the sealing part.

[0014] Furthermore, the sealing belt is made of nitrile rubber material.

[0015] The beneficial effect of adopting the above further scheme is that the nitrile rubber material adopted has excellent oil resistance, high wear resistance, and good heat resistance, which can effectively improve the normal service life of the sealing belt.

[0016] A bearing comprises an outer ring, an inner ring and a rolling body arranged between the outer ring and the inner ring. The outer ring and the inner ring are axially staggered. The sealing belts are respectively arranged above and below the joints between the outer ring and the inner ring.

[0017] Furthermore, an annular slot is radially provided at the upper portion of the outer ring, and an annular sealing groove is axially provided at the lower portion of the outer ring;

[0018] The upper part of the inner ring is provided with an annular sealing groove along the axial direction, and the lower part of the inner ring is provided with an annular slot along the radial direction;

[0019] The inserting portion of the sealing belt is inserted into the annular slot, the longitudinal sealing lip of the sealing belt is inserted into the annular sealing groove, and the transverse sealing lip of the sealing belt abuts against the outer annular surface of the outer ring or the inner ring.

[0020] The beneficial effect of adopting the above further scheme is that the transverse sealing lip of the sealing belt contacts and cooperates with the outer annular surface of the bearing, which is the first line of protection and can block the invasion of large particle pollutants. The longitudinal sealing lip cooperates with the annular sealing groove, and grease is stored in the groove. This is the second line of protection and can prevent external fine pollutants and water from invading the interior of the bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] 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 in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0022] Figure 1 This is a cross-sectional view of a common sealing belt installed on a bearing on the market;

[0023] Figure 2 A cross-sectional view of the sealing bag of the utility model;

[0024] Figure 3 This is a cross-sectional view of the sealing belt of the utility model installed on the bearing;

[0025] In the figure, 100, bearing; 110, inner ring; 120, outer ring; 130, rolling element;

[0026] 200, sealing belt; 210, inserting portion; 211, barb; 220, sealing portion; 221, transverse sealing lip; 222, longitudinal sealing lip; 223, sealing protrusion; 230, step;

[0027] 300. annular sealing groove; 400. annular slot. DETAILED DESCRIPTION

[0028] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not imply any priority in order or specific technical meaning. In addition, the concepts of "connection" and "coupling" mentioned in this application, unless otherwise specified, are deemed to include both direct connection (coupling) and indirect connection (coupling).

[0029] When interpreting the description of this application, it is necessary to clarify that the directions or positional relationships indicated by terms such as "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. are based on the perspectives and layouts shown in the drawings, and are intended to facilitate explanation and simplify the description process, rather than being absolute limitations on the actual directions, construction methods, and operation modes of the devices or components. Therefore, these terms should not be understood as restrictive interpretations of the content of this application.

[0030] like Figure 1 The figure shows the common bearing seal belt design on the market, which mostly adopts a flat sealing surface and achieves the sealing effect by closely fitting the inner and outer ring surfaces of the bearing.

[0031] The principles and features of the present invention are described below in conjunction with examples. The examples are only used to explain the present invention and are not used to limit the scope of the present invention.

[0032] like Figure 2 As shown, a sealing strip 200 includes a sealing strip 200 body, wherein the sealing strip 200 body includes an inserting portion 210 and a sealing portion 220 in an integrated structure, wherein the sealing portion 220 includes a transverse sealing lip 221 extending along the direction of the inserting portion 210, and at least one longitudinal sealing lip 222 arranged at the lower part of the transverse sealing lip 221.

[0033] At least one sealing protrusion 223 is provided on the sealing surface of the longitudinal sealing lip 222, so as to prevent the grease inside the raceway from overflowing and losing.

[0034] The inserting portion 210 is provided with barbs 211, which can enhance the friction between the sealing belt 200 and the bearing 100 and reduce the possibility of the sealing belt 200 falling off.

[0035] A step 230 is provided between the inserting portion 210 and the sealing portion 220 .

[0036] The sealing belt 200 is made of nitrile rubber material. The nitrile rubber material has excellent oil resistance, high wear resistance, and good heat resistance, which can effectively improve the normal service life of the sealing belt 200.

[0037] like Figure 3 As shown, a bearing 100 includes an outer ring 120, an inner ring 110 and a rolling body 130 arranged between the outer ring 120 and the inner ring 110. The outer ring 120 and the inner ring 110 are axially staggered, and the sealing belt 200 is respectively provided on the upper and lower parts of the joints between the outer ring 120 and the inner ring 110.

[0038] The upper part of the outer ring 120 is provided with an annular slot 400 along the radial direction (referring to the radial direction of the bearing 100), and the lower part of the outer ring 120 is provided with an annular sealing groove 300 along the axial direction (referring to the axial direction of the bearing 100); the upper part of the inner ring 110 is provided with an annular sealing groove 300 along the axial direction, and the lower part of the inner ring 110 is provided with an annular slot 400 along the radial direction; the plug-in portion of the sealing belt 200 is inserted into the annular slot 400, the longitudinal sealing lip 222 of the sealing belt 200 is inserted into the annular sealing groove 300, the transverse sealing lip 221 of the sealing belt 200 abuts against the outer annular surface of the outer ring 120 or the inner ring 110, and the step 230 abuts against the end surface of the outer ring 120 or the inner ring 110.

[0039] The transverse sealing lip 221 of the sealing belt 200 contacts and cooperates with the outer annular surface of the bearing 100, which is the first line of protection and can block the invasion of large particle pollutants. The longitudinal sealing lip 222 cooperates with the annular sealing groove 300, and grease is stored in the groove. This is the second line of protection and can prevent external fine pollutants and water from invading the interior of the bearing 100.

[0040] The utility model can ensure that the sealing belt 200 has better sealing performance by adopting a double-lip sealing design for the sealing portion 220 of the sealing belt 200. When the sealing belt 200 is installed on the bearing 100 for use, it can provide two layers of protection for the bearing 100. The transverse sealing lip 221 can block large particle pollution, and the longitudinal sealing lip 222 can block the invasion of external fine pollutants or water, while preventing the internal grease from leaking.

[0041] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A sealing tape, characterized in that: It comprises an inserting portion (210) and a sealing portion (220) in an integral structure, wherein the sealing portion (220) comprises a transverse sealing lip (221) extending along the direction of the inserting portion (210), and at least one longitudinal sealing lip (222) arranged below the transverse sealing lip (221).

2. The sealing tape according to claim 1, characterized in that: At least one sealing protrusion (223) is provided on the sealing surface of the longitudinal sealing lip (222).

3. The sealing tape according to claim 1 or 2, characterized in that: The insertion portion (210) is provided with barbs (211).

4. The sealing tape according to claim 3, characterized in that: A step (230) is provided between the insertion portion (210) and the sealing portion (220).

5. The sealing tape according to claim 1, characterized in that: The sealing belt (200) is made of nitrile rubber material.

6. A bearing, characterized in that: The invention comprises an outer ring (120), an inner ring (110) and a rolling body (130) arranged between the outer ring (120) and the inner ring (110); the outer ring (120) and the inner ring (110) are axially offset; a sealing belt (200) as claimed in any one of claims 1 to 5 is respectively arranged above and below the joint between the outer ring (120) and the inner ring (110).

7. The bearing according to claim 6, characterized in that The upper portion of the outer ring (120) is provided with an annular slot (400) in the radial direction, and the lower portion of the outer ring (120) is provided with an annular sealing groove (300) in the axial direction; the upper portion of the inner ring (110) is provided with an annular sealing groove (300) in the axial direction, and the lower portion of the inner ring (110) is provided with an annular slot (400) in the radial direction; the plug-in portion of the sealing belt (200) is inserted into the annular slot (400), the longitudinal sealing lip (222) of the sealing belt (200) is inserted into the annular sealing groove (300), and the transverse sealing lip (221) of the sealing belt (200) abuts against the outer annular surface of the outer ring (120) or the inner ring (110).

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