Double-layer agricultural machinery oil seal

Abstract

The utility model discloses a double-layer agricultural machinery oil seal which comprises an upper sealing ring framework, an upper sealing ring rubber body is vulcanized on the upper sealing ring framework, three upper sealing lips matched with an inner ring are arranged on the upper sealing ring rubber body, and the length of the upper sealing lip on the outermost side is larger than that of the two upper sealing lips on the inner side. The sealing ring further comprises a lower sealing ring framework, a lower sealing ring rubber body is vulcanized on the lower sealing ring framework, three lower sealing lips matched with the outer ring are arranged on the lower sealing ring rubber body, and the length of the lower sealing lip on the innermost side is larger than that of the two lower sealing lips on the outer side.

Description

Technical Field

[0001] The utility model belongs to the technical field of oil seals and relates to a double-layer oil seal for agricultural machinery. Background Art

[0002] With the rapid advancement of agricultural modernization, the degree of agricultural mechanization continues to increase. A large number of agricultural equipment, such as tractors and combine harvesters, are widely used, leading to a steady increase in demand for agricultural machinery oil seals. Multi-lip oil seals are commonly used to seal agricultural machinery transmission components to prevent oil leakage. However, multi-lip oil seals currently on the market are usually equipped with only one elastic ring for fixation. Under long-term use and the continuous rotation and force of agricultural machinery transmission components, gaps can easily form between the multi-lip oil seal and the agricultural machinery transmission components, and even cause it to fall off and break, which may cause oil leakage. Therefore, it is particularly necessary to design a double-layer agricultural machinery oil seal to solve the above problems. Summary of the Invention

[0003] In order to solve the deficiencies of the prior art, the utility model provides a double-layer agricultural machinery oil seal.

[0004] To achieve the above-mentioned purpose, the technical solution of the present invention is: a double-layer agricultural machinery oil seal, comprising an upper sealing ring skeleton, on which an upper sealing ring rubber body is vulcanized, characterized in that the upper sealing ring rubber body has three upper sealing lips that cooperate with the inner ring, and the length of the outermost upper sealing lip is greater than the length of the two inner upper sealing lips, and also includes a lower sealing ring skeleton, on which a lower sealing ring rubber body is vulcanized, the lower sealing ring rubber body has three lower sealing lips that cooperate with the outer ring, and the length of the innermost lower sealing lip is greater than the length of the two outer lower sealing lips.

[0005] The upper sealing ring frame and the lower sealing ring frame are both Z-shaped.

[0006] The upper sealing ring rubber body is provided with a concave portion, and the concave portion is close to the middle position of the upper sealing ring frame.

[0007] The upper sealing ring rubber body also has an upper reinforcing colloid part, and the end of the upper reinforcing colloid part contacts the outer ring; the lower sealing ring rubber body also has a lower reinforcing colloid part, and the end of the lower reinforcing colloid part contacts the inner ring.

[0008] The upper sealing ring frame further comprises an inwardly bent extrusion assembly portion 1 at one end away from the upper sealing lip, and the lower sealing ring frame further comprises an inwardly bent extrusion assembly portion 2 at one end away from the lower sealing lip.

[0009] By adopting the above technical solution, the beneficial effects of the utility model are:

[0010] The utility model significantly improves the mud and water resistance of agricultural machinery bearings by adopting upper and lower sealing rings and a multi-lip contact structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural diagram of the present utility model.

[0012] In the figure, 1a, upper sealing ring skeleton; 1b, upper sealing ring rubber body; 1b1, recessed portion; 1c, upper sealing lip; 1d, extrusion assembly portion 1; 1f, upper reinforced colloid portion; 2a, lower sealing ring skeleton; 2b, lower sealing ring rubber body; 2c, lower sealing lip; 2d, extrusion assembly portion 2; 2f, lower reinforced colloid portion; 3a, outer ring; 3b, inner ring. DETAILED DESCRIPTION

[0013] In order to further explain the technical solution of the present invention, the present invention will be described in detail below through specific embodiments.

[0014] like Figure 1 As shown, the double-layer agricultural machinery oil seal includes an upper sealing ring skeleton 1a, an upper sealing ring rubber body 1b is vulcanized on the upper sealing ring skeleton 1a, and the upper sealing ring rubber body 1b has three upper sealing lips 1c that match the inner ring 3b, and the length of the outermost upper sealing lip 1c is greater than the length of the two inner upper sealing lips 1c, and also includes a lower sealing ring skeleton 2a, a lower sealing ring rubber body 2b is vulcanized on the lower sealing ring skeleton 2a, and the lower sealing ring rubber body 2b has three lower sealing lips 2c that match the outer ring 3a, and the innermost lower The length of the sealing lip 2c is greater than that of the two lower sealing lips 2c on the outside. By designing the mutual cooperation between the upper sealing lip 1c and the lower sealing lip 2c, both of them adopt multiple forms; specifically: the shape of the upper sealing ring skeleton 1a and the lower sealing ring skeleton 2a are both Z-shaped; the upper sealing ring rubber body 1b has a recessed portion 1b1, and the recessed portion 1b1 is close to the middle position of the upper sealing ring skeleton 1a; in addition, a tortuous channel can also be formed between the upper sealing ring rubber body 1b and the lower sealing ring skeleton 2a, effectively enhancing the ability to prevent mud and water from entering.

[0015] The upper sealing ring rubber body 1b also has an upper reinforced colloid portion 1f, and the end of the upper reinforced colloid portion 1f is in contact with the outer ring 3a; the lower sealing ring rubber body 2b also has a lower reinforced colloid portion 2f, and the end of the lower reinforced colloid portion 2f is in contact with the inner ring 3b, which has a certain sealing effect between the inner ring 3b and the outer ring 3a.

[0016] The upper sealing ring frame 1a further comprises an inwardly bent extrusion assembly portion 1d at one end away from the upper sealing lip 1c, and the lower sealing ring frame 2a further comprises an inwardly bent extrusion assembly portion 2d at one end away from the lower sealing lip 2c.

[0017] In summary, the dual locking method of the outer ring 3a and the inner ring 3b is adopted to greatly improve the locking performance of the oil seal.

[0018] The above components are all common standard parts or components known to those skilled in the art, and their structures and principles can be known to those skilled in the art through technical manuals or conventional experimental methods.

[0019] The above embodiments and drawings do not limit the product form and style of the present invention. Any appropriate changes or modifications made by ordinary technicians in the relevant technical field should be deemed to be within the patent scope of the present invention.

Claims

1. A double-layer agricultural machinery oil seal, comprising an upper sealing ring frame (1a), an upper sealing ring rubber body (1b) vulcanized on the upper sealing ring frame (1a), characterized in that: The upper sealing ring rubber body (1b) has three upper sealing lips (1c) that match the inner ring (3b), and the length of the outermost upper sealing lip (1c) is greater than the length of the two inner upper sealing lips (1c). The upper sealing ring also includes a lower sealing ring skeleton (2a), and the lower sealing ring rubber body (2b) is vulcanized on the lower sealing ring skeleton (2a). The lower sealing ring rubber body (2b) has three lower sealing lips (2c) that match the outer ring (3a), and the length of the innermost lower sealing lip (2c) is greater than the length of the two outer lower sealing lips (2c).

2. The double-layer agricultural machinery oil seal according to claim 1, characterized in that: The upper sealing ring frame (1a) and the lower sealing ring frame (2a) are both Z-shaped.

3. The double-layer agricultural machinery oil seal according to claim 2, characterized in that: The upper sealing ring rubber body (1b) has a recessed portion (1b1), and the recessed portion (1b1) is close to the middle position of the upper sealing ring skeleton (1a).

4. The double-layer agricultural machinery oil seal according to claim 3, characterized in that: The upper sealing ring rubber body (1b) also has an upper reinforcing colloid portion (1f), and the end of the upper reinforcing colloid portion (1f) contacts the outer ring (3a); the lower sealing ring rubber body (2b) also has a lower reinforcing colloid portion (2f), and the end of the lower reinforcing colloid portion (2f) contacts the inner ring (3b).

5. The double-layer agricultural machinery oil seal according to claim 1, characterized in that: The upper sealing ring skeleton (1a) further comprises an inwardly bent extrusion assembly portion (1d) at one end away from the upper sealing lip (1c), and the lower sealing ring skeleton (2a) further comprises an inwardly bent extrusion assembly portion (2d) at one end away from the lower sealing lip (2c).

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