Plastic oil drainage screw

Abstract

The utility model discloses a plastic oil drainage screw, which relates to the technical field of oil drainage screws and comprises an oil drainage screw body, a plurality of auxiliary bumps are arranged on the circumferential side wall of the top of the oil drainage screw body, a sealing ring is sleeved on the outer side of the circumference of the bottom of the oil drainage screw body, and the oil drainage screw body comprises a stud sleeved inside the sealing ring. The top end of the nut is provided with a screw socket, and the outer wall of the circumference of the end, away from the sealing ring, of the bottom of the stud is sleeved with threads. The plastic oil drainage screw is reasonable and reliable in structure and easy to operate, the sealing performance and stability of the screw can be well enhanced under the action of the sealing ring, the sealing ring has the performance of high abrasion resistance, low friction, high pressure resistance and the like, and therefore the sealing performance of the plastic oil drainage screw is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of oil drain screws, and specifically, to a plastic oil drain screw. Background Art

[0002] A plastic oil drain screw is a part specifically used in automobiles, machinery or other equipment, mainly for discharging oil. This screw is usually used in cooperation with an oil drain port, and its main function is to facilitate users to discharge the old oil from the equipment when replacing or maintaining the oil. Since it involves the sealing and leakage prevention of liquids, plastic oil drain screws usually have good sealing performance to ensure that no oil leakage occurs during use. In addition, this screw is made of plastic material, which is lighter, lower in cost and not easy to rust compared with metal materials. However, the temperature resistance and chemical resistance of plastic materials also need special attention to ensure stability and reliability in various environments. In the daily maintenance of automobiles or machinery, replacing the plastic oil drain screw is a simple and economical way to maintain the good operation state of the equipment. During the installation of the plastic oil drain screw, when encountering a narrow space and it is inconvenient to use a screwdriver to turn, fingers need to be used to turn it. Moreover, the existing screws are not convenient for the fingers of the staff to turn, are prone to slipping, and it is also easy to cause the fingers to lose strength. In addition, the sealing performance is not high, which easily increases the friction force inside the screw seal ring, thus reducing the service life of the screw seal ring.

[0003] For example, Chinese Patent CN210660963U discloses an oil drain screw, which consists of a split plug part and a retaining ring part. An axially through hole is provided in the middle of the plug part. The retaining ring part includes a ring and a plug. The ring and the plug are fixedly connected, and the plug is located in the middle of the ring. An oil passage is left between the ring and the plug. After the oil drain screw is installed in the oil drain hole at the bottom of the fuel tank, the retaining ring part is located above the plug part, and the plug of the retaining ring part covers the upper port of the axially through hole.

[0004] This oil drain screw has the following disadvantages: Although it only needs to turn the plug part outwards a few turns to make the axially through hole of the plug part leave the plug of the retaining ring part, so that the dirty oil in the fuel tank can enter the axially through hole through the oil passage between the ring and the plug and be discharged from the middle of the oil drain screw, effectively avoiding the dirty oil from contacting the wrench tool. However, during the installation process, when encountering a narrow space and it is inconvenient to use a screwdriver to turn, fingers need to be used to turn it. Moreover, the existing screws are not convenient for the fingers of the staff to turn, are prone to slipping, and it is also easy to cause the fingers to lose strength. In addition, the sealing performance is not high, which easily increases the friction force inside the screw seal ring, thus reducing the service life of the screw seal ring.

[0005] Regarding the problems in the related technology, no effective solution has been proposed yet. Content of the Utility Model

[0006] In view of the problems in the related art, the present utility model proposes a plastic oil drain screw to overcome the above-mentioned technical problems existing in the existing related art.

[0007] For this purpose, the specific technical solution adopted by the present utility model is as follows:

[0008] A plastic oil drain screw includes an oil drain screw body. A plurality of auxiliary bumps are provided on the circumferential side wall at the top of the oil drain screw body. A sealing ring is sleeved on the outer circumference of the bottom of the oil drain screw body. The oil drain screw body includes a stud sleeved inside the sealing ring. A nut is provided at the top end of the stud. A screw opening is provided at the top end of the nut. A thread is sleeved on the outer circumferential wall of the bottom end of the stud and away from the sealing ring.

[0009] Further, for the sake of the role of the auxiliary bumps, when it is convenient for the worker to encounter a narrow space, the screw can be screwed by fingers, so as to increase the contact force with the fingers, and thus the screw can be installed or disassembled conveniently. The auxiliary bumps are provided on the circumferential outer wall of the nut, and the auxiliary bumps are set as an arc structure.

[0010] Further, for the sake of the role of the sealing ring, the sealing performance and stability of the screw can be well enhanced, and the sealing ring has properties such as high wear resistance, low friction, and high pressure resistance, so as to improve the sealing performance of the plastic oil drain screw. The sealing ring includes an outer sleeve sleeved on the circumferential outer wall of the stud. A skeleton is provided on the outer side of the inner part of the outer sleeve, and the skeleton is set as a rectangular structure. A concave elastic strip is provided on one side of the skeleton and inside the outer sleeve. An annular triangular groove is provided at the top end of the outer sleeve. A sealing member is provided on the inner top of the circumference of the outer sleeve. A dust-proof member is provided on the inner bottom of the circumference of the outer sleeve. An annular groove is provided at the bottom of the outer sleeve.

[0011] Further, in order to further improve the sealing performance of the sealing ring, so as to prevent the fluid from flowing out from the inner circumference of the sealing ring and polluting the screw, making the sealing performance of the sealing ring more stable, and further improving the service life of the plastic oil drain screw. The sealing member is composed of a plurality of first sealing lips, and the plurality of first sealing lips are arranged equidistantly from top to bottom on the inner circumference of the top of the outer sleeve. The side wall of the first sealing lip is set as an arc structure, and the end directions of the first sealing lips are the same.

[0012] Further, in order to prevent external dust or particulate matter from invading the inside of the sealing ring, and reducing the contact area between the sealing ring and the screw, reducing the friction force, the dust-proof member is composed of two groups of second sealing lips. The side wall of the second sealing lip is set as an arc structure, and the end directions of the two groups of second sealing lips are opposite.

[0013] The beneficial effects of the present utility model are as follows:

[0014] 1. The structure of the utility model is reasonable and reliable, and the operation is simple. Under the action of the auxiliary bump, it is convenient for the operator to twist the screw with his finger when encountering a narrow space, increasing the contact force with the finger, so that the screw can be installed or disassembled conveniently. At the same time, under the action of the sealing ring, the sealing performance and stability of the screw can be enhanced well, and the sealing ring has the properties of high wear resistance, low friction, high pressure resistance, etc., thereby improving the sealing performance of the plastic oil drain screw.

[0015] 2. By setting the sealing ring, the sealing performance and stability of the screw can be enhanced well, and the sealing ring has the properties of high wear resistance, low friction, high pressure resistance, etc. Under the action of the skeleton and the concave elastic strip, the self-strength of the sealing ring can be improved. Under the action of the sealing element and the dust-proof element, not only the sealing performance of the high sealing ring is improved, but also the intrusion of external dust or particulate matter into the inside of the sealing ring is prevented, thus ensuring the stability of the oil drain screw body during the working process. At the same time, the contact area between the sealing ring and the oil drain screw body is reduced, thereby reducing the friction force between the sealing ring and the oil drain screw body, and further improving the service life of the oil drain screw body. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0017] Figure 1 is a three-dimensional view of a plastic oil drain screw according to an embodiment of the present utility model;

[0018] Figure 2 is another three-dimensional view of a plastic oil drain screw according to an embodiment of the present utility model;

[0019] Figure 3 is a schematic structural view of the sealing ring in a plastic oil drain screw according to an embodiment of the present utility model;

[0020] Figure 4 is a cross-sectional view of the sealing ring in a plastic oil drain screw according to an embodiment of the present utility model;

[0021] Figure 5 is Figure 4 a partial enlarged view of part A in

[0022] In the figure:

[0023] 1. Oil drain screw body; 101. Stud; 102. Nut; 103. Screw opening; 104. Thread; 2. Auxiliary bump; 3. Sealing ring; 301. Outer sleeve; 302. Skeleton; 303. Concave elastic strip; 304. Annular triangular groove; 305. Sealing element; 3051. First sealing lip; 306. Dust-proof element; 3061. Second sealing lip; 307. Annular groove. Detailed implementation mode

[0024] To further illustrate each embodiment, the present invention provides accompanying drawings. These drawings are a part of the disclosure of the present invention, mainly used to illustrate the embodiments, and can be used in conjunction with the relevant descriptions in the specification to explain the operating principle of the embodiments. With reference to these contents, those of ordinary skill in the art should be able to understand other possible implementation manners and the advantages of the present invention. The components in the drawings are not drawn to scale, and similar component symbols are usually used to represent similar components.

[0025] According to an embodiment of the present invention, a plastic oil drain screw is provided.

[0026] Now, the present invention will be further described in conjunction with the accompanying drawings and the specific implementation manners. As Figures 1 - 5 shown, the plastic oil drain screw according to an embodiment of the present invention includes an oil drain screw body 1. A plurality of auxiliary bumps 2 are provided on the circumferential side wall of the top of the oil drain screw body 1. A sealing ring 3 is sleeved on the outer circumference of the bottom of the oil drain screw body 1. The oil drain screw body 1 includes a stud 101 sleeved inside the sealing ring 3. A nut 102 is provided at the top end of the stud 101. A screw opening 103 is provided at the top end of the nut 102. A thread 104 is sleeved on the circumferential outer wall of the bottom of the stud 101 and away from the sealing ring 3.

[0027] In one embodiment, for the above-mentioned auxiliary bump 2, the auxiliary bump 2 is provided on the circumferential outer wall of the nut 102, and the auxiliary bump 2 is set as an arc structure. So that under the action of the auxiliary bump 2, when the worker encounters a narrow space, the screw can be screwed with fingers, increasing the contact force with the fingers, and thus the screw can be conveniently installed or disassembled.

[0028] In one embodiment, for the above-mentioned sealing ring 3, the sealing ring 3 includes an outer sleeve 301 sleeved on the circumferential outer wall of the stud 101. A skeleton 302 is arranged on the outer side of the interior of the outer sleeve 301, and the skeleton 302 is arranged in a rectangular structure. A concave elastic strip 303 is arranged on one side of the skeleton 302 and inside the outer sleeve 301. An annular triangular groove 304 is formed at the top end of the outer sleeve 301. A sealing member 305 is arranged at the inner top of the circumference of the outer sleeve 301, and a dust-proof member 306 is arranged at the inner bottom of the circumference of the outer sleeve 301. An annular groove 307 is formed at the bottom of the outer sleeve 301. The sealing member 305 is composed of a number of first sealing lips 3051, and the number of first sealing lips 3051 are arranged equidistantly from top to bottom on the inner circumference of the top of the outer sleeve 301. The side wall of the first sealing lip 3051 is arranged in an arc structure, and the end directions of the first sealing lips 3051 are the same. The dust-proof member 306 is composed of two groups of second sealing lips 3061. The side wall of the second sealing lip 3061 is arranged in an arc structure, and the end directions of the two groups of second sealing lips 3061 are opposite. Under the action of the sealing ring 3, the sealing performance and stability of the screw can be enhanced well, and the sealing ring 3 has properties such as high wear resistance, low friction, and high pressure resistance, thereby improving the sealing performance of the plastic oil drain screw.

[0029] The specific working principle of the sealing ring 3 is as follows: The outer sleeve 301 surrounds the circumferential outer wall of the stud 101 and is the main structure of the sealing ring 3, ensuring a firm combination between the sealing ring 3 and the stud 101. A rectangular-structured skeleton 302 is arranged inside, enhancing the overall structural stability and compressive capacity of the outer sleeve 301. The skeleton 302 makes the sealing ring 3 not easily deformed under mechanical pressure, ensuring a good sealing effect in the long term. The concave elastic strip 303 located inside on one side of the skeleton 302 provides additional elasticity, enabling the sealing ring 3 to adapt to the inner wall of the fuel tank drain hole during assembly, thereby improving the sealing performance. The annular triangular groove 304 at the top and the sealing member 305 cooperate to increase the complexity of the sealing contact surface and improve the sealing efficiency. The sealing member 305 is composed of a number of first sealing lips 3051, and these first sealing lips 3051 are arranged equidistantly and have an arc-shaped side wall structure, enabling a more uniform pressing under pressure, thereby optimizing the sealing effect. The dust-proof member 306 at the bottom is composed of two groups of second sealing lips 3061. The second sealing lips 3061 have an arc-shaped side wall and opposite end directions, which can prevent dust and other particles from entering the sealed environment and also provide additional sealing protection to a certain extent. The annular groove 307 at the bottom can possibly be used for installing or cooperating with additional sealing components to further improve the sealing performance.

[0030] To facilitate the understanding of the above technical solutions of the present invention, the working principle or operation method of the present invention in the actual process will be described in detail below.

[0031] In actual application, first, install the oil drain screw body 1 in the oil drain hole at the bottom of the fuel tank. Turn the nut 102 by inserting a screwdriver into the screw hole 103 or turn the nut 102 by finger under the action of the auxiliary bump 2 to drive the stud 101 and the thread 104 to rotate and install tightly in the oil drain hole. When the oil drain screw body 1 is installed into the oil drain hole of the fuel tank, the sealing ring 3 is tightly sleeved on the outer circumference of the bottom of the oil drain screw body 1 and forms a sealing effect with the inner wall of the fuel tank oil drain hole to prevent oil leakage.

[0032] In the present utility model, unless otherwise clearly defined and limited, terms such as "installation", "setting", "connection", "fixation", "rotation connection", etc. shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components. Unless otherwise clearly defined, for those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0033] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A plastic drain screw, comprising a drain screw body (1), characterized in that: A plurality of auxiliary protrusions (2) are provided on the top circumferential side wall of the oil drain screw body (1), and a sealing ring (3) is sleeved on the outer side of the bottom circumference of the oil drain screw body (1).

2. A plastic oil drain screw according to claim 1, characterized in that: The oil drain screw body (1) comprises a stud (101) sleeved inside the sealing ring (3), a nut (102) being arranged at the top end of the stud (101), a screw hole (103) being provided at the top end of the nut (102), and a thread (104) being sleeved on the outer wall of the circumference of the bottom end of the stud (101) away from the sealing ring (3).

3. A plastic oil drain screw according to claim 2, characterized in that: The auxiliary protrusion (2) is arranged on the circumferential outer wall of the nut (102), and the auxiliary protrusion (2) is arranged as an arc-shaped structure.

4. A plastic oil drain screw according to claim 3, characterized in that: The sealing ring (3) comprises an outer ring sleeve (301) sleeved on the circumferential outer wall of the stud (101), a frame (302) is arranged on the inner and outer sides of the outer ring sleeve (301), and the frame (302) is arranged in a rectangular structure, and a concave elastic strip (303) is arranged on one side of the frame (302) and located inside the outer ring sleeve (301).

5. A plastic oil drain screw according to claim 4, characterized in that: The top of the outer ring sleeve (301) is provided with an annular triangular groove (304), the top of the inner circumference of the outer ring sleeve (301) is provided with a sealing member (305), the bottom of the inner circumference of the outer ring sleeve (301) is provided with a dustproof member (306), and the bottom of the outer ring sleeve (301) is provided with an annular groove (307).

6. A plastic oil drain screw according to claim 5, characterized in that: The sealing member (305) is composed of a plurality of first sealing lips (3051), and the plurality of first sealing lips (3051) are arranged equidistantly from top to bottom on the inner side of the top circumference of the outer ring sleeve (301), the side walls of the first sealing lips (3051) are arranged as an arc structure, and the end directions of the first sealing lips (3051) are all the same.

7. A plastic oil drain screw according to claim 6, characterized in that: The dustproof part (306) is composed of two groups of second sealing lips (3061), the side walls of the second sealing lips (3061) are arranged as an arc-shaped structure, and the end portions of the two groups of the second sealing lips (3061) are in opposite directions.

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