Hub bearing sealing ring with high sealing performance

Abstract

The utility model discloses a hub bearing sealing ring with high sealing performance. The hub bearing sealing ring comprises two rigid rings with L-shaped radial sections, the two rigid rings form a filling ring with a frame-shaped radial section and a gap at the joint; the filling ring seals a gap between the inner ring and the outer ring of the bearing; a rubber ring is arranged on the inner wall, close to the interval, of the frame; the rubber ring is provided with at least two axial lips which abut against the inner wall right opposite to the rubber ring in a sealed mode. The axial lip inclines towards the central position of the bearing; the outermost end of the axial lip is provided with a first protruding ring which extends towards the outer side and abuts against the adjacent rigid ring in a sealed mode. The number of the axial lips and the first convex ring are increased, so that the sealing performance is improved; the embedded groove is formed, so that the connection stability is improved, and the machining steps of the rigid ring are reduced; and one side of the rubber ring is pressed between the first framework and the bearing outer ring, and the outer side of the other side of the rubber ring is flush with the first framework, so that the rubber ring flanging phenomenon caused by relative movement is prevented to a great extent.

Description

Technical Field

[0001] The utility model belongs to the technical field of wheel hub bearings, and particularly relates to a wheel hub bearing sealing ring with high sealing performance. Background Art

[0002] The wheel hub bearing seal is an important part of the automobile wheel hub bearing. Its main function is to prevent dust and moisture from entering the bearing while keeping the grease inside the bearing. A good seal can not only provide the necessary sealing performance, but also reduce friction and wear to a certain extent, thereby extending the service life of the bearing. With the development of automobile technology, the design and materials of wheel hub bearing seals are also constantly improving to meet higher performance requirements and more complex use environments.

[0003] The Chinese patent document with publication number CN208138324U discloses an energy-saving wheel hub bearing three-lip sealing structure device, which relates to the wheel hub bearing sealing mechanism and the technical field of new energy vehicles. In the utility model: the end of the bending structure of the first support mechanism is connected with a three-lip sealing mechanism; the second radial sealing lip plate is located between the first radial sealing lip plate and the axial sealing lip plate; the fixed steel plate includes a first sealing plate and a second sealing plate; the three-lip sealing mechanism is connected to the fixed steel plate by interference fit contact.

[0004] The above patent solution only considers normal road conditions and working conditions, and does not take into account sudden changes in weather and working conditions. During the driving process of the vehicle, mud and water will splash onto the surface of the bearing and accumulate. Under the action of gravity, some of the mud and sand will enter the axial lip of the sealing ring, increasing the wear of the sealing ring. As the wear increases, the sealing performance will deteriorate and the product life will be shortened. Utility Model Content

[0005] In order to overcome the technical problem in the prior art that mud, water, sand and gravel will accumulate on the bearing surface under harsh environment and working conditions, and then invade into the sealing ring, increasing the wear of the sealing ring; one purpose of the utility model is to provide a high-sealing wheel hub bearing sealing ring, by arranging multiple axial lips on the rubber ring and adding a convex ring at the end of the axial lip to improve the tightness of the abutment with the second frame, thereby preventing mud, water, sand and gravel from invading the sealing ring.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a high-sealing hub bearing sealing ring, comprising two rigid rings with L-shaped radial cross-section shapes coaxially arranged with the bearing; the two rigid rings form a filling ring with a frame-shaped radial cross-section shape and a gap at the connection; the filling ring seals the gap between the inner and outer rings of the bearing; the frame is provided with a rubber ring on the inner wall close to the gap; the rubber ring is provided with at least two axial lips that are sealed against the inner wall opposite to it; the axial lip is inclined toward the central position of the bearing; the outermost end of the axial lip is provided with a first convex ring extending outward and sealing against the adjacent rigid ring.

[0007] The two rigid rings are respectively arranged in a positive L-shape and an inverted L-shape along the bearing axis direction to form the frame type; the axial lip produces elastic deformation under the pressure of the two rigid rings, and at the same time the first convex ring is also compressed to produce elastic deformation, changing the original line contact form of the axial lip into a surface contact form, sealing the gap in the middle of the frame type, and the more than two layers of axial lips form multiple barriers for dust and sand to enter the gap, and can also prevent the reduction of elastic force due to the large thickness of the axial lip, and can also prevent dust and sand from causing wear between the axial lip thickness direction and the rigid ring. Therefore, the overall sealing effect is increased, the wear between the sealing rings is reduced, and the service life of the sealing ring is increased.

[0008] Furthermore, the end of the rubber ring away from the bearing axis is provided with two radial lips sealing against the frame inner wall; the two radial lips are respectively a first radial lip inclined away from the spacing direction and a second radial lip inclined toward the spacing direction.

[0009] The first radial lip and the second radial lip seal the gap between the two rigid rings within the gap; the first radial lip mainly prevents mud, sand and dust from entering the lubricating grease within the gap; the second radial lip mainly prevents the lubricating grease from overflowing from the bearing.

[0010] Specifically, the angle between the first radial lip and the bearing axis is equal to the angle between the second radial lip and the bearing axis; the angle between the first radial lip and the second radial lip is greater than 90 degrees and less than 120 degrees.

[0011] Specifically, a second convex ring extending away from the spacing direction is provided at the outermost end of the first radial lip; the radial cross-section of the second convex ring is a quadrilateral.

[0012] The second convex ring increases the sealing tightness and, to a certain extent, increases the strength of the first radial lip, weakens the deformation ability, and prevents the first radial lip from flanging toward the second radial lip during the press-in assembly process of the rigid ring.

[0013] Preferably, the first convex ring is located on a side of the outermost end of the axial lip close to the bearing axis; and the radial cross-section of the first convex ring is triangular.

[0014] Furthermore, the two rigid rings are respectively a first frame arranged on the inner wall of the bearing outer ring and a second frame arranged on the outer wall of the bearing inner ring; the gap close to the inner side of the interval is located close to the bearing axis; the rubber ring is arranged on the first frame facing the second frame.

[0015] There is interference fit between the first frame and the outer ring of the bearing, between the second frame and the inner ring of the bearing, and between the rubber ring and the first frame.

[0016] Specifically, the radial cross section of the rubber ring is L-shaped and fits the first frame toward the second frame. Both ends of the radial cross section of the rubber ring are respectively provided with embedding grooves for plugging with the first frame.

[0017] The rubber ring is plugged into the embedding groove, so that the connection strength between the rubber ring and the first frame is increased, and the rubber ring and the first frame are prevented from being separated during the assembly process, thereby reducing the assembly defective rate.

[0018] Preferably, an outer convex block is arranged on the rubber ring between the first frame and the outer ring of the bearing.

[0019] The outer protrusion is pressed between the first frame and the outer ring of the bearing to prevent the connection between the rubber ring and the first frame from loosening during use, and the rubber ring is brought into the gap to reduce the sealing effect of the sealing ring.

[0020] Preferably, notches are respectively provided at both ends of the radial cross section of the first skeleton and are located in the embedding groove.

[0021] Specifically, the two gaps are a first gap close to the outer ring of the bearing and a second gap close to the interval; the thickness of the first skeleton adjacent to the first gap is less than the thickness of the main part of the first skeleton; the thickness of the first skeleton adjacent to the second gap is equal to the thickness of the main part of the first skeleton.

[0022] The first notch leaves enough tightening space for the outer protrusion, while also ensuring the connection strength between the first skeleton and the outer ring of the bearing; the second notch is produced by the bending of the first skeleton body, and one end of the rubber ring close to the second notch is flush with the first skeleton, preventing the lubricating grease from turning the rubber ring outward for a long time during movement, thereby ensuring the connection strength between the rubber ring and the first skeleton.

[0023] Compared with the prior art, the beneficial effects of the present invention are:

[0024] 1. By increasing the number of axial lips and setting a first convex ring at the end of the axial lip, the sealing performance is improved. Especially in harsh use environments and working conditions, it can effectively prevent dust and sand from entering the sealing ring and the gap between the inner and outer rings of the bearing, reduce the wear of the sealing ring, and increase the service life of the sealing ring and the bearing.

[0025] 2. By arranging embedding grooves for plugging (interference fit) with the first frame at both ends of the rubber ring, the connection stability between the rubber ring and the first frame is increased. The rubber ring is only a change in the mold, but the processing steps of the rigid ring are reduced, that is, the processing cost is reduced and the processing efficiency is improved.

[0026] 3. One side of the rubber ring is pressed between the first frame and the outer ring of the bearing, and the outer side of the other side is flush with the first frame, which largely prevents the rubber ring from flanging due to relative movement, thereby further ensuring the sealing effect of the sealing ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the assembly cross section of the utility model;

[0028] Figure 2 It is a schematic diagram of the radial cross-section assembly of the utility model;

[0029] Figure 3 It is a schematic diagram of a radial cross-section decomposition of the utility model.

[0030] In the figure: 1, first frame; 11, first notch; 12, second notch; 2, rubber ring; 21, axial lip; 211, first convex ring; 22, first radial lip; 221, second convex ring; 23, second radial lip; 24, first embedded groove; 241, outer convex block; 25, second embedded groove; 3, second frame; 31, guide angle; 4, bearing inner ring; 5, bearing outer ring; 6, interval; 7, gap DETAILED DESCRIPTION

[0031] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0032] In the description of the present invention, it should be noted that directional words, such as the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of narrating the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and cannot be understood as limiting the specific protection scope of the present invention.

[0033] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features. Therefore, the definition of "first" and "second" features can explicitly or implicitly include one or more of the features. In the description of the utility model, the meaning of "several" is two or more, unless otherwise clearly and specifically defined.

[0034] In the present invention, unless otherwise specified and limited, the terms "setting", "installation" 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 also be a mechanical connection; it can be directly connected, or it can be connected through an intermediate medium, or two elements can be internally connected. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] See also Figure 1-Figure 3 A high-sealing wheel hub bearing sealing ring comprises two rigid rings with L-shaped radial cross-sections arranged coaxially with the bearing; the two rigid rings form a filling ring with a frame-shaped radial cross-section and a gap 7 at the connection; the filling ring seals the gap 6 between the inner and outer rings of the bearing; the two rigid rings are respectively a first skeleton 1 arranged on the inner wall of the outer ring 5 of the bearing and a second skeleton 3 arranged on the outer wall of the inner ring 4 of the bearing; the first skeleton 1 and the second skeleton 3 are respectively arranged in a positive L-shape and an inverted L-shape to form a filling ring filling the gap 6 between the inner and outer rings of the bearing; the radial cross-section of the filling ring is a frame-shaped and the connection between the two L-shapes has the gap 7; wherein the gap 7 close to the inside of the gap 6 is located away from the axis of the bearing, and the gap 7 away from the inside of the gap 6 is located close to the axis of the bearing.

[0036] A rubber ring 2 with an L-shaped radial cross-section and fitting the first skeleton 1 is arranged on the inner wall of the first skeleton 1 close to the inner wall of the spacer 6; two parallel axial lips 21 inclined toward the central position of the bearing are arranged on the side of the rubber ring 2 away from the spacer 6; the axial lips 21 abut against the second skeleton 3; a first convex ring 211 abutting against the second skeleton 3 is arranged at one end of the axial lip 21 away from the spacer 6 close to the bearing axis; the radial cross-section shape of the first convex ring 211 is triangular.

[0037] The end of the rubber ring 2 away from the bearing axis is provided with two radial lips that seal against the inner wall of the second skeleton 3; the two radial lips are respectively a first radial lip 22 inclined in the direction away from the gap 6 and a second radial lip 23 inclined in the direction close to the gap 6; the outermost end of the first radial lip 22 is provided with a second convex ring 221 extending in the direction away from the gap 6; the radial cross-section shape of the second convex ring 221 is a quadrilateral.

[0038] Both ends of the radial cross section of the rubber ring 2 are respectively provided with embedding grooves for plugging into the first skeleton 1; both ends of the radial cross section of the first skeleton 1 are respectively provided with notches in the embedding grooves; the two notches are respectively a first notch 11 close to the bearing outer ring 5 and a second notch 12 close to the interval 6; the thickness of the first skeleton 1 adjacent to the first notch 11 is less than the thickness of the main part of the first skeleton 1; the thickness of the first skeleton 1 adjacent to the second notch 12 is equal to the thickness of the main part of the first skeleton 1.

[0039] The two embedding grooves are respectively a first embedding groove 24 facing the first notch 11 and a second embedding groove 25 facing the second notch 12; an external protrusion 241 is provided on the rubber ring 2 on the side of the first embedding groove 24 close to the bearing axis; the external protrusion 241 is clamped between the first skeleton 1 and the bearing outer ring 5.

[0040] The outer wall of the second frame 3 is provided with a guide angle 31 for easy press-fitting at one end facing the spacer 6. The above is only a specific embodiment of the utility model, but the technical features of the utility model are not limited thereto. Any changes or modifications made by any technician in the field of the utility model are included in the patent scope of the utility model.

Claims

1. A wheel hub bearing seal ring with high sealing performance, characterized in that: The invention comprises two rigid rings with L-shaped radial cross-sections arranged coaxially with the bearing; the two rigid rings form a filling ring with a frame-shaped radial cross-section and a gap at the connection; the filling ring seals the gap between the inner and outer rings of the bearing; the frame is provided with a rubber ring on the inner wall close to the gap; the rubber ring is provided with at least two axial lips that are sealed against the inner wall opposite to it; the axial lips are inclined toward the central position of the bearing; the outermost end of the axial lip is provided with a first convex ring that extends outward and seals against the adjacent rigid ring.

2. The sealing ring according to claim 1, characterized in that; The end of the rubber ring away from the bearing axis is provided with two radial lips which are sealed against the frame inner wall; the two radial lips are respectively a first radial lip inclined away from the spacing direction and a second radial lip inclined towards the spacing direction.

3. The sealing ring according to claim 2, characterized in that; The angle between the first radial lip and the bearing axis is equal to the angle between the second radial lip and the bearing axis; the angle between the first radial lip and the second radial lip is greater than 90 degrees and less than 120 degrees.

4. The sealing ring according to claim 2, characterized in that: A second convex ring extending away from the spacing direction is disposed at the outermost end of the first radial lip; the radial cross-section of the second convex ring is a quadrilateral.

5. The sealing ring according to any one of claims 1 to 4, characterized in that; The first convex ring is located on the outermost end of the axial lip and close to the bearing axis; the radial cross-section of the first convex ring is triangular.

6. The sealing ring according to any one of claims 1 to 4, characterized in that: The two rigid rings are respectively a first frame arranged on the inner wall of the bearing outer ring and a second frame arranged on the outer wall of the bearing inner ring; the gap close to the inner side of the interval is located close to the bearing axis; the rubber ring is arranged on the first frame facing the second frame.

7. The sealing ring according to claim 6, characterized in that: The radial cross section of the rubber ring is L-shaped and fits the first frame toward the second frame. Both ends of the radial cross section of the rubber ring are respectively provided with embedding grooves for plugging with the first frame.

8. The sealing ring according to claim 6, characterized in that; An outer convex block is arranged on the rubber ring between the first frame and the outer ring of the bearing.

9. The sealing ring according to claim 7, characterized in that: Two ends of the radial cross section of the first skeleton are respectively provided with notches in the embedding groove.

10. The sealing ring according to claim 9, characterized in that: The two gaps are respectively a first gap close to the outer ring of the bearing and a second gap close to the interval; the thickness of the first skeleton adjacent to the first gap is less than the thickness of the main part of the first skeleton; the thickness of the first skeleton adjacent to the second gap is equal to the thickness of the main part of the first skeleton.

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