Dipstick sleeve and tractor dipstick sleeve fixing and sealing structure

Abstract

The utility model discloses an oil dipstick sleeve and a tractor oil dipstick sleeve fixing and sealing structure, which comprise an oil pan, a mounting hole is arranged on the oil pan, the oil dipstick sleeve is hermetically mounted in the mounting hole, a clearance fit section is in clearance fit with an inner hole of the mounting hole, and an interference section is in interference fit with the inner hole of the mounting hole. The spigot end face abuts against the opening of the mounting hole. The oil dipstick sleeve has the advantages that the oil dipstick sleeve is suitable for the situation that a short oil dipstick sleeve is difficult to fix and seal or a long oil dipstick sleeve does not have a pipe clamp fixing position, sealing of the oil dipstick sleeve and an oil pan installation hole is guaranteed through sealing of the O-shaped ring of the clearance fit section and fixing of the interference section, and it is guaranteed that an oil dipstick is firmly and reliably installed. Meanwhile, the shorter interference section facilitates the assembly of the oil dipstick sleeve and reduces the risk that the oil pan mounting hole is cracked due to interference assembly, so that the production and assembly efficiency is improved, the quality loss is reduced, and the oil dipstick sleeve is easy to popularize and apply.

Description

Technical Field

[0001] The utility model relates to the sealing of a tractor oil dipstick sleeve, in particular to an oil dipstick sleeve and a tractor oil dipstick sleeve fixing sealing structure. Background Art

[0002] Tractors have diversified functions, and different customers have different requirements for the oil dipstick insertion and removal positions. In order to meet customer needs, reduce the variety of oil pans, and reduce development costs, different dipstick sleeves are generally added to the oil pan to achieve this. At present, the dipstick sleeve of tractors often adopts two fixing structures. One is a small gap rubber ring seal, and the dipstick sleeve is fixed with a pipe clamp. The other is that the dipstick sleeve is fixed with the interference section of the oil pan mounting hole. The first type requires a pipe clamp to be added to the dipstick sleeve due to the small gap fit, and the dipstick sleeve is fixed to other positions of the engine to prevent the dipstick sleeve from rotating or falling off. This type requires additional fixation, so it is not easy to implement in structures where short dipstick sleeves are difficult to fix, or long dipstick sleeves have no pipe clamp fixing position. The second type of interference section seal fixation is difficult for workers to assemble, and there is a risk of cracking the oil pan, resulting in quality loss. Therefore, how to solve the problem of short dipstick sleeves being difficult to fix, or the lack of a fixed position for the dipstick sleeve pipe clamp, while improving installation efficiency and reducing quality costs, is an urgent problem in the current engine technology field. Utility Model Content

[0003] The utility model aims to overcome the disadvantages of the prior art and provides an oil dipstick sleeve and a tractor oil dipstick sleeve fixing and sealing structure.

[0004] The purpose of the utility model is achieved through the following technical solutions: an oil dipstick sleeve, characterized in that: it includes a tube body, the tube body has an insertion end and an exposed end, the diameter of the insertion end is larger than the diameter of the insertion end, and the junction of the insertion end and the exposed end forms a stop end face, the insertion end is provided with a clearance fit section, a transition section and an interference section in sequence from front to back, the clearance fit section is provided with an annular sealing groove, a sealing ring is installed in the annular sealing groove, the transition section is a conical structure, and the diameter of the interference section is larger than the diameter of the clearance fit section.

[0005] Optionally, the length of the interference segment accounts for 30% to 35% of the length of the insertion end.

[0006] Optionally, the clearance fit section accounts for 45% to 48% of the length of the insertion end.

[0007] A tractor oil dipstick sleeve fixing sealing structure comprises an oil pan, a mounting hole is opened on the oil pan, an oil dipstick sleeve is sealingly mounted in the mounting hole, a clearance fit is formed between a clearance fit section and an inner hole of the mounting hole, an interference fit is formed between the interference section and the inner hole of the mounting hole, and a stop end face abuts against an orifice of the mounting hole.

[0008] Optionally, the mounting holes are arranged to be inclined upward.

[0009] Optionally, the mounting hole is a stepped hole, and the insertion end of the dipstick sleeve is mounted in the large hole of the stepped hole.

[0010] The utility model has the following advantages: the tractor oil dipstick sleeve fixing sealing structure of the utility model is suitable for the situation that the short oil dipstick sleeve is difficult to fix and seal, or the long oil dipstick sleeve has no pipe clamp fixing position. Through the O-ring sealing of the clearance fitting section and the fixing of the interference section, the oil dipstick sleeve and the oil pan installation hole are sealed, and the oil dipstick is firmly and reliably installed. At the same time, the shorter interference section facilitates the assembly of the oil dipstick sleeve and reduces the risk of the oil pan installation hole being cracked due to interference assembly, thereby improving the production assembly efficiency, reducing quality loss, and being easy to promote and apply. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 Schematic diagram of the fixed sealing structure of the tractor oil dipstick sleeve

[0012] Figure 2 Installation diagram of the dipstick sleeve and the oil pan

[0013] Figure 3 for Figure 2 Enlarged schematic diagram of point A in the middle

[0014] Figure 4 Schematic diagram of the oil dipstick casing

[0015] Figure 5 Schematic diagram of the cross section of the dipstick casing

[0016] In the figure, 1-oil dipstick sleeve, 2-oil pan, 3-mounting hole, 4-sealing ring, 11-clearance fit section, 12-transition section, 13-interference section, 14-stop end face. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. The components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0018] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0019] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features thereof may be combined with each other.

[0020] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0021] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the utility model product is usually placed when in use, or the positions or positional relationships commonly understood by those skilled in the art, which are only for the convenience of describing the present utility model 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 cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0022] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] like Figure 1As shown, a tractor oil dipstick sleeve fixed sealing structure includes an oil pan, and a mounting hole is opened on the oil pan. In this embodiment, the mounting hole is inclined upward, and an oil dipstick sleeve is sealed and installed in the mounting hole. In this embodiment, the oil dipstick sleeve includes a tube body, and the tube body has an insertion end and an exposed end. The diameter of the insertion end is larger than the diameter of the insertion end, and a stop end face is formed at the junction of the insertion end and the exposed end. The insertion direction of the insertion end is forward, and a clearance fit section, a transition section and an interference section are sequentially arranged on the insertion end from front to back. An annular sealing groove is opened on the clearance fit section. A sealing ring is installed inside, and the transition section is a tapered structure, and the diameter of the interference section is larger than the diameter of the clearance fit section. When the insertion end is inserted into the mounting hole, a clearance fit is formed between the clearance fit section and the inner hole of the mounting hole, an interference fit is formed between the interference section and the inner hole of the mounting hole, the stop end face abuts against the hole opening of the mounting hole, and the sealing ring is squeezed into the mounting hole, thereby sealing the mounting hole and realizing a sealed installation between the oil dipstick sleeve and the oil pan, and through the interference fit between the interference section and the mounting hole, the oil dipstick sleeve can be fixed, so that the oil dipstick sleeve is firmly installed and not easy to loosen.

[0024] In this embodiment, the length of the interference section accounts for 30% to 35% of the length of the insertion end, so the length of the interference section is shorter, which is convenient for workers to assemble and improves production efficiency. In addition, the interference section is designed to be shorter, which can reduce the risk of the oil pan mounting hole being cracked due to interference assembly. In addition, the dimensional accuracy requirements for the inner diameter of the oil pan mounting hole and the outer diameter of the interference section of the oil dipstick sleeve are not high, which facilitates the processing of the inner diameter of the oil pan mounting hole and the interference section.

[0025] In this embodiment, the clearance fit section accounts for 45% to 48% of the length of the insertion end. The transition section makes the clearance fit section and the interference section transition evenly. Moreover, the clearance fit section can facilitate the insertion of the insertion end into the mounting hole. The transition section and the clearance fit section can play a guiding role, thereby facilitating the interference fit between the interference section and the mounting hole.

[0026] In this embodiment, the mounting hole is a stepped hole, and the insertion end of the dipstick sleeve is installed in the large hole of the stepped hole. During installation, the clearance fit section is first inserted into the mounting hole. When the interference section enters the mounting hole, the dipstick sleeve is slowly knocked, and the knocking direction is consistent with the insertion direction of the dipstick sleeve. When the end face of the stop is flush with the end face of the mounting hole, it indicates that the dipstick sleeve is installed in place.

[0027] In this embodiment, the clearance fit section is Figure 5 At C in the figure, the transition section is Figure 5 At D in the figure, the interference fit section is Figure 5 At E in the middle.

[0028] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An oil dipstick sleeve, characterized in that: The utility model comprises a tube body, wherein the tube body has an insertion end and an exposed end, the diameter of the insertion end is larger than the diameter of the insertion end, and the junction between the insertion end and the exposed end forms a stop end face, the insertion end is provided with a clearance fitting section, a transition section and an interference section in sequence from front to back, the clearance fitting section is provided with an annular sealing groove, a sealing ring is installed in the annular sealing groove, the transition section is a conical structure, and the diameter of the interference section is larger than the diameter of the clearance fitting section.

2. The oil dipstick sleeve according to claim 1, characterized in that: The length of the interference section accounts for 30% to 35% of the length of the insertion end.

3. The dipstick sleeve according to claim 1, characterized in that: The clearance fit section accounts for 45% to 48% of the length of the insertion end.

4. A tractor oil dipstick sleeve fixed sealing structure, characterized in that: It includes an oil pan, which is provided with a mounting hole, in which the oil dipstick sleeve according to any one of claims 1 to 3 is sealed and installed, a clearance fit is formed between the clearance fit section and the inner hole of the mounting hole, an interference fit is formed between the interference section and the inner hole of the mounting hole, and the stop end face abuts against the orifice of the mounting hole.

5. A tractor oil dipstick sleeve fixing and sealing structure according to claim 4, characterized in that: The mounting hole is arranged to be inclined upward.

6. A tractor oil dipstick sleeve fixing and sealing structure according to claim 4, characterized in that: The mounting hole is a stepped hole, and the insertion end of the oil dipstick sleeve is mounted in the large hole of the stepped hole.

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