Sealing device for engine oil dipstick and oil filling pipe and special wading operation equipment

Abstract

A sealing device for an engine oil dipstick and an oil filling pipe and special wading operation equipment comprise a sealing ring coaxially arranged on the periphery of an engine oil dipstick handle in a sleeving mode and located between a pressing plate and an end cover, and further comprises an expansion sealing mechanism coaxially arranged in an inner cavity of the oil filling pipe and located between the end cover and the engine oil dipstick. And a through hole for an engine oil dipstick handle to penetrate through is coaxially formed in the expansion sealing mechanism. Through reasonable arrangement of component structures, waterproof sealing between the engine oil dipstick handle and the end cover is guaranteed, water is effectively prevented from entering the oil filling pipe from the matching position below the engine oil dipstick handle and above the end cover, meanwhile, the expansion sealing mechanism is matched, the waterproof sealing effect of the engine oil dipstick handle installed on the oil filling pipe opening is enhanced, and the overall structure is easy to implement and convenient to use. The waterproof sealing effect is good.

Description

Technical Field

[0001] The utility model belongs to the technical field of special water-related equipment, and in particular relates to a sealing device for an oil dipstick and a fuel filler pipe, and special water-related operation equipment. Background Art

[0002] Key components of commercial vehicle assemblies, such as engines and transmissions, all have oil fill ports, often equipped with a dipstick for oil level monitoring. Typically, installing a dipstick at the fill port provides limited protection against dust and water. With the continuous advancement of vehicle technology, special operation vehicles are now required to have excellent water resistance to prevent water from seeping into key components through the dipstick mounting point during wading operations, potentially damaging the equipment and preventing oil and water from mixing and leaking into the interior. Summary of the Invention

[0003] In view of the above problems, the purpose of the present invention is to provide a sealing device for an oil dipstick and a fuel filler pipe and special water-related operation equipment, so as to solve the problem of waterproof sealing when the oil dipstick in the special water-related operation equipment is installed at the fuel filler pipe opening.

[0004] To achieve the above-mentioned purpose, the technical solutions adopted by the present invention include:

[0005] A sealing device for an oil dipstick and a fuel filler pipe comprises a sealing ring coaxially arranged on the outer periphery of an oil dipstick handle and located between a pressure plate and an end cover, and an expansion sealing mechanism coaxially arranged in the inner cavity of the fuel filler pipe and located between the end cover and the oil dipstick, wherein a through hole for the oil dipstick handle to pass through is coaxially arranged in the expansion sealing mechanism.

[0006] Preferably, the expansion sealing mechanism includes a coaxially arranged limit section, a guide sealing section, an interference sealing section and a serrated section from top to bottom; the outer diameter of the limit section is larger than the outer diameter of the upper end of the fuel pipe; the outer periphery of the interference sealing section and the inner wall of the fuel pipe are interference fit; the outer periphery of the serrated section and the inner wall of the fuel pipe are clearance fit, and a plurality of annular grooves are coaxially provided on the outer periphery of the serrated section.

[0007] Preferably, there is a clearance fit between the sealing ring and the oil dipstick handle.

[0008] Preferably, there is a clearance fit between the expansion sealing mechanism and the oil dipstick handle.

[0009] A special water-related operation equipment includes a refueling pipe, an oil dipstick is coaxially provided at the lower part of the inner cavity of the refueling pipe, an end cap is covered at the upper end of the refueling pipe, and an oil dipstick handle is coaxially inserted into the end cap, the inner cavity of the refueling pipe and the oil dipstick from top to bottom, and the lower end of the oil dipstick handle is threadedly connected to the oil dipstick; and also includes the sealing device for the oil dipstick and the refueling pipe disclosed in this application.

[0010] Preferably, the inner periphery of the upper port of the fuel filling pipe is provided with a chamfer.

[0011] Compared with the prior art, the advantages of the present invention are:

[0012] (1) The sealing device for the oil dipstick and the fuel filler pipe and the special water-related operation equipment of the present invention ensures a waterproof seal between the oil dipstick handle and the end cover by rationally arranging the component structure, effectively preventing water from entering the fuel filler pipe from the fitting portion below the oil dipstick handle and above the end cover. At the same time, the expansion sealing mechanism is used to enhance the waterproof sealing effect of the oil dipstick handle installed on the fuel filler pipe opening. The overall structure is easy to implement and has a good waterproof sealing effect.

[0013] (2) The sealing device for the oil dipstick and the fuel filler pipe and the special water-related operation equipment of the present invention have a reasonable arrangement of the component structure, and the outer periphery of the interference seal section of the expansion sealing mechanism and the inner wall of the fuel filler pipe are interference-fitted, thereby increasing the reliability of the fuel filler pipe opening seal and effectively preventing water from entering the fuel filler pipe from between the end cover and the fuel filler pipe.

[0014] (3) The sealing device for the oil dipstick and the fuel filler pipe and the special water-related operation equipment of the present invention have a reasonable arrangement of the component structure. The serrated section and the fuel filler pipe are clearance-matched in the free state, which makes it easy for the expansion sealing mechanism to be installed in the fuel filler pipe. At the same time, when the expansion sealing mechanism is compressed, it can be closed and expanded by interference fit with the inner wall of the fuel filler pipe, so that the oil dipstick assembly will not fall off from the fuel filler pipe when it is tightened. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present invention but do not constitute a limitation of the present invention. In the accompanying drawings:

[0016] Figure 1 This is a schematic structural diagram of a sealing device for an oil dipstick and a fuel filler pipe and a special water-related operation device according to the present invention;

[0017] Figure 2 for Figure 1 Schematic diagram of the structure of the expansion sealing mechanism;

[0018] The symbols in the figure represent:

[0019] 1 sealing ring, 2 expansion sealing mechanism; a limiting section, b guide sealing section, c interference sealing section, d serrated section;

[0020] A. Oil dipstick handle, A0. Clamping plate, B. End cap, C. Filling pipe, D. Oil dipstick DETAILED DESCRIPTION

[0021] The utility model is not limited to the following specific embodiments, and all equivalent changes made on the basis of the technical solution of this application fall within the protection scope of the utility model.

[0022] It should be noted that the directional terms mentioned in this article, such as "inner cavity", "inner periphery", "inner wall" and "outside", are consistent with the specific directions on the paper in the drawings of the specification or the corresponding directions of the space shown in the drawings; all components and equipment in this utility model, unless otherwise specified, are all components and equipment known in the prior art.

[0023] Example 1

[0024] This embodiment discloses a sealing device for an oil dipstick and a fuel filler pipe, comprising a sealing ring 1 coaxially sleeved around the outer periphery of an oil dipstick handle A and positioned between a pressure plate A0 and an end cap B; and an expansion sealing mechanism 2 coaxially disposed within the inner cavity of the fuel filler pipe C and positioned between the end cap B and the oil dipstick D. A through hole is coaxially defined within the expansion sealing mechanism 2 for the oil dipstick handle A to pass through.

[0025] Its function is: when the oil dipstick handle A is rotated clockwise, the sealing ring 1 is compressed to ensure the waterproof seal between the oil dipstick handle A and the end cover B, effectively preventing water from entering the fuel filler pipe C from the fitting point below the oil dipstick handle A and above the end cover B. At the same time, it cooperates with the expansion sealing mechanism 2 to strengthen the waterproof sealing effect of the oil dipstick handle A installed on the fuel filler pipe B. The overall structure is easy to implement and has a good waterproof sealing effect.

[0026] The sealing ring 1 disclosed in this embodiment may be a waterproof rubber pad.

[0027] Among them, there is a clearance fit between the sealing ring 1 and the oil dipstick handle A, and there is a clearance fit between the expansion sealing mechanism 2 and the oil dipstick handle A, so that the oil dipstick handle A passes through the sealing ring 1 and the oil dipstick handle A through hole.

[0028] The expansion sealing mechanism 2 disclosed in this embodiment includes, from top to bottom, a coaxially arranged limit section a, a guide sealing section b, an interference sealing section c, and a serrated section d. The outer diameter of the limit section a is larger than the outer diameter of the upper end of the fuel pipe C, so that when the oil dipstick handle A is screwed in and tightened, the expansion sealing mechanism 2 is always located inside the upper end of the fuel pipe C; the guide sealing section b is a circular arc designed on the outer periphery of the expansion sealing mechanism 2 at the corner where the fuel pipe C end and the expansion sealing mechanism 2 meet, which plays a guiding role when the expansion sealing mechanism 2 is inserted into the fuel pipe C. At the same time, the guide sealing section b matches the inner and outer fillet structure of the fuel pipe C end, and the fit of the inner and outer fillets increases the sealing effect; the outer periphery of the interference sealing section c is an interference fit with the inner wall of the fuel pipe C. , increasing the reliability of the seal of the fuel filler pipe C, and effectively preventing water from entering the fuel filler pipe C from between the end cover B and the fuel filler pipe C; there is a clearance fit between the outer periphery of the serrated segment d and the inner wall of the fuel filler pipe C, and a plurality of annular grooves are coaxially provided on the outer periphery of the serrated segment d. The serrated segment d and the fuel filler pipe C are clearance fit in the free state, which facilitates the easy installation of the expansion sealing mechanism 2 into the fuel filler pipe C. At the same time, when the expansion sealing mechanism 2 is compressed, the expansion sealing mechanism 2 can also be expanded with the inner wall of the fuel filler pipe C through interference, so that the oil dipstick assembly will not fall off from the fuel filler pipe C when tightened.

[0029] The material of the expansion sealing mechanism 2 disclosed in this embodiment can be selected from expansion rubber.

[0030] Example 2

[0031] A special water-related operation device includes a refueling pipe C, an oil dipstick D coaxially disposed in the lower portion of the inner cavity of the refueling pipe C, an end cap B enclosed at the upper end of the refueling pipe C, and an oil dipstick handle A coaxially extending from top to bottom through the end cap B, the inner cavity of the refueling pipe C, and the oil dipstick D, with the lower end of the oil dipstick handle A being threadedly connected to the oil dipstick D; and also includes the sealing device for the oil dipstick and the refueling pipe disclosed in Example 1;

[0032] The lower end of the oil dipstick handle A passes through the sealing ring 1, end cap B, expansion seal mechanism 2, and threaded connection with the end of the oil dipstick D, forming the oil dipstick assembly. When the oil dipstick assembly is fully inserted into the opening of the fuel filler pipe C, rotate the oil dipstick handle A clockwise. The expansion seal mechanism 2 is compressed during rotation, increasing its diameter. The interference fit of the expansion seal section c of the expansion seal mechanism 2 and the inner wall of the fuel filler pipe C achieves a sealing effect. The serrated section d of the expansion seal mechanism 2 has a clearance fit with the inner wall of the fuel filler pipe 5. When the oil dipstick assembly is tightened, the serrated section d can expand and tighten against the inner wall of the fuel filler pipe 5. Simultaneously, the sealing ring 1 is compressed when the oil dipstick is tightened, achieving a sealing effect.

[0033] The inner periphery of the upper end of the fuel filler pipe C disclosed in this embodiment is chamfered.

[0034] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings. However, the present disclosure is not limited to the specific details of the above embodiments. Within the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all fall within the scope of protection of the present disclosure.

[0035] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0036] In addition, the various different implementation methods disclosed in this solution can also be arbitrarily combined, as long as they do not violate the ideas of this disclosure, they should also be regarded as the contents of the invention of this disclosure.

Claims

1. A sealing device for an oil dipstick and a fuel filler pipe, characterized in that: The invention comprises a sealing ring (1) coaxially arranged on the outer periphery of an oil dipstick handle (A) and located between a pressing plate (A0) and an end cover (B), and an expansion sealing mechanism (2) coaxially arranged in the inner cavity of a fuel filling pipe (C) and located between the end cover (B) and an oil dipstick (D). A through hole for the oil dipstick handle (A) to pass through is coaxially arranged in the expansion sealing mechanism (2).

2. The sealing device for an oil dipstick and a fuel filler pipe according to claim 1, characterized in that: The expansion sealing mechanism (2) comprises, from top to bottom, a coaxially arranged limiting section (a), a guide sealing section (b), an interference sealing section (c) and a serrated section (d); The outer diameter of the limiting section (a) is larger than the outer diameter of the upper end of the refueling pipe (C); The outer periphery of the interference seal section (c) and the inner wall of the refueling pipe (C) are in interference fit; There is a clearance fit between the outer periphery of the sawtooth section (d) and the inner wall of the refueling pipe (C), and a plurality of annular grooves are coaxially provided on the outer periphery of the sawtooth section (d).

3. The sealing device for an oil dipstick and a fuel filler pipe according to any one of claims 1 or 2, characterized in that: There is a clearance fit between the sealing ring (1) and the oil dipstick handle (A).

4. The sealing device for an oil dipstick and a fuel filler pipe according to any one of claims 1 or 2, characterized in that: There is a clearance fit between the expansion sealing mechanism (2) and the oil dipstick handle (A).

5. A special water-related operation equipment, comprising a refueling pipe (C), an oil dipstick (D) coaxially provided at the lower portion of the inner cavity of the refueling pipe (C), an end cap (B) provided at the upper end of the refueling pipe (C), and an oil dipstick handle (A) coaxially penetrating the end cap (B), the inner cavity of the refueling pipe (C), and the oil dipstick (D) in sequence from top to bottom, wherein the lower end of the oil dipstick handle (A) is threadedly connected to the oil dipstick (D); characterized in that: It also includes a sealing device for an oil dipstick and a fuel filler pipe as described in any one of claims 1 to 4.

6. The special water-related operation equipment according to claim 5, characterized in that: The inner periphery of the upper end of the refueling pipe (C) is provided with a chamfer.

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