Wheel hub sealing ring with wave-shaped backflow lines

Abstract

The utility model discloses a wave-shaped backflow line hub sealing ring which comprises a rubber body, a lip is arranged on the rubber body, backflow lines are arranged on the side face of the rubber body, the tail ends of the backflow lines are arranged on the lip, the backflow lines comprise a plurality of wave crests and a plurality of wave troughs, and the wave crests and the wave troughs are alternately arranged in the circumferential direction of the rubber body. The wheel hub sealing ring with the wave-shaped backflow lines has the advantages that the wave-shaped backflow lines can push oil in the axial direction, the oil pumping capacity is improved, and therefore the sealing effect of the sealing ring is greatly improved; the waveform path contacts with the rotating shaft, the abrasion degree of the same position of the rotating shaft is reduced, and the probability of sealing failure caused by shaft abrasion is reduced; the temperature rise of the waveform lip is small, the probability of lip abrasion and failure caused by too high temperature is also reduced, and the risk of oil leakage is reduced; the oil seal with the backflow line structure can be suitable for the eccentric application working condition of 0.4-0.6 mm.

Description

Technical Field

[0001] The utility model relates to the technical field of wheel hub sealing rings, in particular to a wheel hub sealing ring with a corrugated backflow pattern. Background Art

[0002] The wheel hub seal has the function of protecting the sealing medium from leakage and sealing the oil. Most bearing seals are composed of a rubber body and a skeleton. As the sealing lip wears during use, the performance of the seal will be affected. Therefore, a reasonable design of the seal structure to ensure the stability of the lip can effectively prevent the leakage of internal grease, which plays a key role in the quality and life of the wheel hub unit. The common backflow patterns currently on the market have problems such as: the end of the backflow pattern is not on the positive lip, but far away from the positive lip, resulting in poor oil pumping capacity, and the presence of processing lines on the oil seal shaft, which can easily cause early oil leakage of the oil seal; the raised height of the backflow pattern is relatively high, and when rotating at high speed, the backflow pattern is easily worn and causes failure, and the ordinary backflow pattern structure oil seal is suitable for applications with eccentricity within 0.2mm. Utility Model Content

[0003] In order to solve the technical problems existing in the background technology, the utility model proposes a wheel hub sealing ring with a corrugated backflow pattern.

[0004] The utility model proposes a wheel hub seal ring with a corrugated backflow pattern, comprising a rubber body, a lip being provided on the rubber body, a side surface of the rubber body having a backflow pattern, an end of the backflow pattern being on the lip, the backflow pattern comprising a plurality of crests and a plurality of troughs, the crests and troughs being alternately arranged along the circumference of the rubber body, and adjacent crests and troughs being connected by smooth curves.

[0005] Specifically, the sealing ring is used on a wheel hub unit of a commercial vehicle. The wave crests and the wave troughs are each provided with 8 pairs, and the wave crests and the wave troughs are alternately arranged and connected by smooth curves to form a wave-shaped backflow pattern.

[0006] Preferably, the rubber body has an oil seal lip side surface and an air lip side surface, the oil seal lip side surface gradually tilts outward from a side away from the air lip side surface to a side close to the air lip side surface, and the air lip side surface gradually tilts outward from a side away from the oil seal lip side surface to a side close to the oil seal lip side surface, and a lip is formed at the connection between the air lip side surface and the oil seal lip side surface.

[0007] Preferably, the angle between the side surface of the oil seal lip and a vertical plane passing through the axis of the rubber body is defined as the sealing lip oil side angle, and the sealing lip oil side angle is 30-60°.

[0008] Preferably, the angle between the side surface of the air lip and a vertical plane passing through the axis of the rubber body is defined as an air side angle, and the air side angle is 20-40°.

[0009] Preferably, a spring is provided on a side of the rubber body away from the lip.

[0010] Preferably, the distance between the midpoint of the spring and the wave crest along the axis of the rubber body is 0.5-1.5 mm.

[0011] Preferably, the distance between the midpoint of the spring and the wave crest along the axis of the rubber body is 0.

[0012] Preferably, it further comprises a skeleton, and the rubber body is fixed on the skeleton.

[0013] Preferably, an auxiliary seal is provided at one end of the rubber body away from the wave valley.

[0014] In the present invention, the wheel hub seal ring with a corrugated backflow pattern has the following advantages:

[0015] 1. The wave-shaped oil return pattern pushes the oil in the axial direction, increasing the oil pumping capacity, thus greatly improving the sealing effect of the sealing ring;

[0016] 2. The wave path contacts the rotating shaft, reducing the degree of wear at the same position of the rotating shaft and reducing the probability of seal failure due to shaft wear;

[0017] 3. The temperature rise of the corrugated lip is small, which also reduces the probability of lip wear and failure due to excessive temperature, and reduces the risk of oil leakage;

[0018] 4. Furthermore, the wheel hub seal ring with the corrugated return pattern of the present invention can be applied to eccentric applications of 0.4 to 0.6 mm.

[0019] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of the utility model;

[0021] Figure 2 This is a schematic diagram of the backflow pattern structure of the sealing ring of the utility model after it is unfolded;

[0022] Figure 3 This is a cross-sectional view of the crest rubber ring of the utility model;

[0023] Figure 4 This is a schematic diagram of the rubber ring structure of the trough part of the utility model;

[0024] In the figure: 1. Rubber body; 2. Lip; 3. Crest; 4. Skeleton; 5. Auxiliary seal; 6. Spring; 7. Valley. DETAILED DESCRIPTION

[0025] The following describes in detail embodiments of the present invention. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar symbols throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention, and should not be construed as limiting the present invention.

[0026] like Figure 1 Figure 2 The wheel hub seal ring with a corrugated backflow pattern shown in the figure comprises a rubber body 1, a lip 2 on the rubber body 1, a backflow pattern on the side of the rubber body 1, the end of the backflow pattern is on the lip 2, and the backflow pattern comprises a plurality of crests 3 and a plurality of troughs 7, as shown in FIG. Figure 2 As shown, the crest 3 is located above the trough 7, and the crests 3 and troughs 7 are alternately arranged along the circumference of the rubber body 1. Adjacent crests 3 and troughs 7 are connected by smooth curves, as shown in FIG. Figure 2 As shown, the rubber body 1 is unfolded to form a specific structure of its backflow pattern, and the backflow pattern structure is similar to a sine curve;

[0027] Preferably, it further comprises a skeleton 4, the rubber body 1 is fixed on the skeleton 4, an outer extension is provided below the rubber body 1, and the skeleton 4 is mounted on the outer extension; a deformation hole is provided on the outer extension;

[0028] Specifically, the sealing ring is used on the wheel hub unit of a commercial vehicle, and 8 pairs of sealing rings are provided in both the crest 3 and the trough 7 parts;

[0029] Specifically, the rubber body 1 has an oil seal lip side surface and an air lip side surface. The oil seal lip side surface gradually tilts outward from a side away from the air lip side surface to a side close to the air lip side surface. The air lip side surface gradually tilts outward from a side away from the oil seal lip side surface to a side close to the oil seal lip side surface. The connection between the air lip side surface and the oil seal lip side surface forms a lip 2.

[0030] like Figure 3 、 Figure 4 The angle between the side surface of the oil seal lip and a vertical plane passing through the axis of the rubber body 1 is defined as the oil side angle of the sealing lip 2. The oil side angle of the sealing lip 2 is as follows: Figure 3 、 Figure 4 The mark is a, the oil side angle a of the sealing lip 2 is 30-60°, and the angle between the air lip side and a vertical plane passing through the axis of the rubber body 1 is defined as the air side angle. The air side angle is as follows: Figure 3 、 Figure 4The angle b shown is 20-40° on the air side. The distance between the midpoint of the spring 6 and a certain point of the lip 2 along the axis of the rubber body 1 is defined as R. Due to the setting of the peak 3, the trough 7, and the smooth curve, R is a periodically changing value. Figure 3 As shown, preferably, the distance R between the midpoint of the spring 6 and the crest 3 along the axis of the rubber body 1 is 1 mm; Figure 4 As shown, preferably, the distance R between the midpoint of the spring 6 and the crest 3 along the axis of the rubber body 1 is 0. Due to the arrangement of the crest 3, the trough 7 and the smooth curve, the oil side angle a and the air side angle b of the sealing lip 2 are variable. At the same time, due to the change in the distance between the midpoint of the spring 6 and a certain point of the lip 2 along the axis of the rubber body 1, a wave-shaped backflow pattern is formed.

[0031] Preferably, an auxiliary seal 5 is provided at one end of the rubber body 1 away from the trough 7 , and the distance between the auxiliary seal 5 and the central axis of the rubber body 1 is slightly smaller than the distance between the lip 2 and the axis of the rubber body 1 .

[0032] The proposed wave-shaped backflow pattern wheel hub seal has the following advantages:

[0033] 1. The wave-shaped oil return pattern pushes the oil in the axial direction, increasing the oil pumping capacity, thus greatly improving the sealing effect of the sealing ring;

[0034] 2. The wave path contacts the rotating shaft, reducing the degree of wear at the same position of the rotating shaft and reducing the probability of seal failure due to shaft wear;

[0035] 3. The temperature rise of the corrugated lip 2 is small, which also reduces the probability of wear and failure of the lip 2 due to excessive temperature, and reduces the risk of oil leakage;

[0036] 4. The reflow pattern structure oil seal of the utility model can be applied to eccentric application conditions of 0.4 to 0.6 mm.

[0037] 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 to 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 device or element referred to 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.

[0038] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0039] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0040] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0041] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A wheel hub seal ring with a corrugated backflow pattern, comprising a rubber body (1), a lip (2) being provided on the rubber body (1), characterized in that: The side of the rubber body (1) has a reflow pattern, the end of the reflow pattern is on the lip (2), and the reflow pattern includes a plurality of crests (3) and a plurality of troughs (7). The crests (3) and troughs (7) are alternately arranged along the circumference of the rubber body (1), and adjacent crests (3) and troughs (7) are connected by smooth curves.

2. The wheel hub seal ring with a wave-shaped backflow pattern according to claim 1, characterized in that: The rubber body (1) has an oil seal lip side surface and an air lip side surface. The oil seal lip side surface gradually tilts outward from a side away from the air lip side surface to a side close to the air lip side surface. The air lip side surface gradually tilts outward from a side away from the oil seal lip side surface to a side close to the oil seal lip side surface. A lip (2) is formed at the connection between the air lip side surface and the oil seal lip side surface.

3. The wheel hub seal ring with a corrugated return pattern according to claim 2, characterized in that: The angle between the side surface of the oil seal lip and a vertical plane passing through the axis of the rubber body (1) is defined as the oil side angle of the sealing lip (2), and the oil side angle of the sealing lip (2) is 30 to 60 degrees.

4. The wheel hub seal ring with a corrugated return pattern according to claim 2 or 3, characterized in that: The angle between the side surface of the air lip and a vertical plane passing through the axis of the rubber body (1) is defined as an air side angle, and the air side angle is 20 to 40 degrees.

5. The wheel hub seal ring with a corrugated return pattern according to claim 1, characterized in that: A spring (6) is provided on a side of the rubber body (1) away from the lip (2).

6. The wheel hub seal ring with a corrugated return pattern according to claim 5, characterized in that: The distance between the midpoint of the spring (6) and the wave crest (3) along the axis of the rubber body (1) is 0.5-1.5 mm.

7. The wheel hub seal ring with a corrugated return pattern according to claim 5, characterized in that: The distance between the midpoint of the spring (6) and the wave crest (3) along the axis direction of the rubber body (1) is 0.

8. The wheel hub seal ring with a wave-shaped backflow pattern according to claim 1, characterized in that: It also includes a skeleton (4), and the rubber body (1) is fixed on the skeleton (4).

9. The wheel hub seal ring with a corrugated return pattern according to claim 1, characterized in that: An auxiliary seal (5) is provided at one end of the rubber body (1) away from the wave valley (7).

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