Novel backflow thread hub sealing ring

Abstract

The utility model provides a novel backflow thread hub sealing ring, which relates to the technical field of sealing rings, and comprises a rubber ring, two backflow threads are raised on a sealing lip of the rubber ring, the two backflow threads are mutually crossed in a sine manner and are spaced by a half period, and a first included angle is formed between the sealing lip of the rubber ring and a gravity center line on a cross section. The two backflow lines are connected to form the connecting line, the fusiform block is divided into the upper half area and the lower half area by the connecting line, the fusiform block in the upper half area is gradually decreased from the upper peak top to the two sides, meanwhile, the fusiform block in the lower half area is gradually increased from the lower peak top to the two sides, the front-back distance is changed, the sealing lip of the sealing ring can be more attached to a bearing, and the sealing effect is better. The failure caused by the fact that the tail ends of the backflow lines are not on the positive lip, are far away from the positive lip and are high in protruding height of the backflow lines, the backflow lines are prone to abrasion during rotation is reduced, the service life of the sealing ring is prolonged, meanwhile, the effect that the backflow lines pump oil backwards is enhanced, and the oil sealing capacity of the sealing ring is enhanced.

Description

Technical Field

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

[0002] The hub seal is used on the car hub. The 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 frame. The wear of the sealing lip during use will affect the use effect of the seal. The structure of the seal can ensure the stability of the lip and effectively prevent the leakage of internal grease. It plays a key role in the quality and life of the hub unit. When the shaft rotates in one direction at high speed, it may not be enough to rely solely on the main lip of the oil seal to seal the medium. At the same time, it also depends on the pumping effect of the reflux pattern on the lip to pump the oil back into the cavity to avoid oil leakage.

[0003] The currently disclosed oil seal reflow pattern structure has a problem in which the end of the reflow pattern is not on the positive lip and is far away from the positive lip, resulting in poor oil capacity of the pump. The raised height of the reflow pattern is relatively high. When rotating at high speed, the reflow pattern is easily worn and may cause failure, which in turn causes frequent replacement and increases maintenance costs. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a novel backflow pattern wheel hub sealing ring to reduce the problem of low durability of the wheel hub sealing ring.

[0005] Based on the technical problems existing in the background technology, the utility model proposes a new type of reflow pattern wheel hub sealing ring, including a rubber ring, wherein two reflow patterns are raised on the sealing lip of the rubber ring, and the two reflow patterns are sinusoidally crossed with each other and spaced half a period apart, and in the cross section, the sealing lip of the rubber ring forms a first angle with the center of gravity line.

[0006] Preferably, the two reflow patterns are respectively sine and inverse sine and intersect each other, and the two intersecting areas form a shuttle block, and a plurality of shuttle blocks are connected end to end to form a sealing lip annularly installed on the rubber ring.

[0007] Preferably, there are 18 shuttle-shaped blocks.

[0008] Preferably, the interval between the upper peak of the shuttle-shaped block and the upper edge of the sealing lip is less than 0.05 mm.

[0009] Preferably, the distance between the upper peak of the shuttle-shaped block and the sealing lip is 0.15 mm.

[0010] Preferably, the shuttle-shaped block is inclined relative to the sealing lip, and in the cross section, a second angle is formed between the shuttle-shaped block and the sealing lip, and the second angle is 3 degrees.

[0011] Preferably, the first angle is 20 degrees.

[0012] Compared with the prior art, the new type of recirculation pattern wheel hub seal ring proposed by the utility model adopts the above technical solution and achieves the following technical effects:

[0013] In the utility model, two reflow patterns are connected to form a connecting line, which divides the shuttle-shaped block into an upper half and a lower half. The shuttle-shaped blocks in the upper half decrease step by step from the upper peak to both sides, while the shuttle-shaped blocks in the lower half increase step by step from the lower peak to both sides. The front-to-back distance changes, so that the sealing lip of the sealing ring can fit the bearing more closely, and the reflow pattern is easily worn and fails during high-speed rotation because the end of the reflow pattern is not on the positive lip and is far away from the positive lip and the raised height of the reflow pattern is high. While increasing the service life of the sealing ring, the effect of the reflow line pumping oil back is enhanced, thereby enhancing the oil sealing ability of the sealing ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a cross-sectional structural diagram of the utility model;

[0015] Figure 2 This is a structural diagram of the backflow pattern of the utility model;

[0016] Figure 3 It is a cross-sectional side view of the utility model.

[0017] In the figure: 1, rubber ring; 2, backflow pattern; 3, sealing lip; 4, first angle; 5, shuttle block; 6, second angle. DETAILED DESCRIPTION

[0018] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0019] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0020] Example

[0021] Please refer to Figure 1-Figure 3 The utility model proposes a new wheel hub seal ring with reflow pattern 2, comprising a rubber ring 1, and two reflow patterns 2 are raised on the sealing lip 3 of the rubber ring 1, and the two reflow patterns 2 are sinusoidally crossed and spaced half a period apart, and in the cross section, the sealing lip 3 of the rubber ring 1 forms a first angle 4 with the center of gravity line. In the utility model, the two reflow patterns 2 are connected to form a connecting line, and the connecting line divides the shuttle block 5 into an upper half area and a lower half area, and the shuttle block 5 in the upper half area decreases step by step from the upper peak to both sides, and the distance between the front and the back changes at the same time, so that the sealing lip 3 of the sealing ring can fit the bearing more closely, and reduce the reflow pattern 2 being easily worn and causing failure when rotating at high speed because the end of the reflow pattern 2 is not on the positive lip, is far away from the positive lip, and the protrusion height of the reflow pattern 2 is high, and the reflow pattern 2 is easy to wear and fail when rotating at high speed, and the service life of the sealing ring is increased, and the effect of the reflow line pumping oil back is enhanced, and the oil sealing ability of the sealing ring is enhanced.

[0022] In a specific embodiment, refer to Figure 1 , Figure 2 The two reflow patterns 2 are respectively sine and inverse sine and cross each other, and the two cross regions form a shuttle block 5. The multiple shuttle blocks 5 are connected end to end to form a ring-shaped sealing lip 3 installed on the rubber ring 1. The ring formed between the shuttle blocks 5 can form two lines of defense on the upper and lower sides of the sealing lip 3, and increase the thickness of the oil barrier to improve the sealing strength.

[0023] In a specific embodiment, refer to Figure 1 , the shuttle block 5 has 18.

[0024] In a specific embodiment, refer to Figure 3 , the interval between the upper peak of the shuttle-shaped block 5 and the upper edge of the sealing lip 3 is less than 0.05 mm.

[0025] In a specific embodiment, refer to Figure 3 The distance between the upper peak of the shuttle block 5 and the sealing lip 3 is 0.15 mm.

[0026] In a specific embodiment, refer to Figure 3The shuttle-shaped block 5 is inclined relative to the sealing lip 3. In the cross section, a second angle 6 is formed between the shuttle-shaped block 5 and the sealing lip 3. The second angle 6 is 3 degrees.

[0027] In a specific embodiment, refer to Figure 3 , the first angle 4 is 20 degrees.

[0028] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A new type of backflow pattern wheel hub seal ring, characterized in that: The invention comprises a rubber ring (1), wherein two reflow lines (2) are raised on a sealing lip (3) of the rubber ring (1), the two reflow lines (2) are sinusoidally intersecting each other and spaced apart by half a period, and in a cross section, the sealing lip (3) of the rubber ring (1) forms a first angle (4) with a gravity center line.

2. The new type of backflow pattern wheel hub seal according to claim 1 is characterized in that: The two reflow patterns (2) are respectively sine and inverse sine and intersect each other, and the two intersecting areas form a shuttle-shaped block (5). A plurality of shuttle-shaped blocks (5) are connected end to end to form a sealing lip (3) annularly mounted on the rubber ring (1).

3. The new type of backflow pattern wheel hub seal according to claim 2 is characterized in that: The shuttle-shaped blocks (5) are in plurality.

4. The new type of backflow pattern wheel hub seal according to claim 2 is characterized in that: There is a gap between the upper peak of the shuttle-shaped block (5) and the upper edge of the sealing lip (3).

5. The novel backflow pattern wheel hub seal ring according to claim 2 is characterized in that: There is a distance between the upper peak of the shuttle-shaped block (5) and the sealing lip (3).

6. The novel backflow pattern wheel hub seal ring according to claim 2 is characterized in that: The shuttle-shaped block (5) is inclined relative to the sealing lip (3), and in a cross section, a second angle (6) is formed between the shuttle-shaped block (5) and the sealing lip (3).

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