Automobile exhaust sensing fastener

Abstract

The automobile exhaust sensing fastener comprises a body with a cavity in the middle, a connecting part and an operating part are arranged on the outer wall of the body, an outer groove is formed between the connecting part and the operating part, an outer positioning table is formed on the side, facing the connecting part, of the operating part, and an outer sealing gasket is installed on the outer positioning table; an inner matching section and a spindle hole section are arranged on the inner wall of the body, an inner groove is formed between the inner matching section and the spindle hole section, an inner positioning table is formed on the side, facing the inner matching section, of the spindle hole section, an outer matching section is arranged on the side, away from the spindle hole section, of the inner matching section, and a sensor matching table is formed on the side, facing the outer matching section, of the inner diameter of the inner matching section. An inner sealing gasket is installed on the sensor matching table, and a conical guide part is arranged at the free end of the outer matching section. According to the fastening piece, the fastening piece can be conveniently screwed, mounted or dismounted by means of the operation part, the sealing performance between the sensor and the fastening piece is effectively guaranteed, and the sealing performance between the fastening piece and an automobile exhaust pipe sensor mounting hole position can also be guaranteed.

Description

Technical Field

[0001] This invention belongs to the field of engine accessory assembly technology, and in particular relates to a fastener for automotive exhaust gas sensing. Background Technology

[0002] Automotive exhaust gas sensors are key components for controlling vehicle emissions, reducing environmental pollution, and improving fuel combustion quality in automotive engines. With increasingly stringent emission standards, exhaust gas sensors require greater accuracy and sensitivity. Typically, exhaust gas sensors are mounted on the engine's exhaust pipe using fasteners. However, most current exhaust gas sensors are secured directly with nuts, which result in poor sealing and reduced sensor accuracy. Therefore, it is necessary to improve existing exhaust gas sensor fasteners. Summary of the Invention

[0003] In view of this, the present invention aims to overcome the deficiencies in the prior art and proposes an automotive exhaust gas sensing fastener.

[0004] To achieve the above objectives, the technical solution created by this invention is implemented as follows:

[0005] An automotive exhaust gas sensor fastener includes a body with a cavity in the middle. The outer wall of the body has a connecting part and an operating part. An outer groove is provided between the connecting part and the operating part, and the outer diameter of the connecting part is smaller than the outer diameter of the operating part. An outer positioning platform is formed on the side of the operating part facing the connecting part, and an outer sealing gasket is installed on the outer positioning platform. The inner wall of the body has an inner mating section and a main shaft hole section. An inner groove is provided between the inner mating section and the main shaft hole section. The inner diameter of the inner mating section is larger than the inner diameter of the main shaft hole section. An inner positioning platform is formed on the side of the main shaft hole section facing the inner mating section. An outer mating section is provided on the side of the inner mating section away from the main shaft hole section. The inner diameter of the outer mating section is larger than the inner diameter of the inner mating section. A sensor mating platform is formed on the side of the inner diameter of the inner mating section facing the outer mating section. An inner sealing gasket is installed on the sensor mating platform. A conical guide is provided at the free end of the outer mating section.

[0006] Furthermore, the operating part adopts an external hexagonal structure.

[0007] Furthermore, the connecting part adopts an external thread structure.

[0008] Furthermore, the outer sealing gasket is made of rubber or asbestos, and the inner sealing gasket is made of rubber or asbestos.

[0009] Furthermore, the internal mating section includes an internal thread structure.

[0010] Furthermore, the inner mating section is provided with several sealing grooves, and sealing elements are installed in the sealing grooves.

[0011] Furthermore, the sealing element is a rubber sealing ring.

[0012] Furthermore, the length of the spindle hole section is greater than the length of the connecting part.

[0013] Compared with existing technologies, the present invention has the following advantages:

[0014] This invention features a simple and reasonable structure. The fastener can be easily installed or removed by rotating the operating part on the main body. The inner wall of the fastener is provided with an inner mating part and an outer mating part that fits into the sensor housing. Sealing gaskets are provided at both the outer and inner mating parts to effectively ensure the sealing between the sensor and the fastener. At the same time, an outer sealing gasket is installed on the outer positioning platform on the side of the operating part facing the connection part to ensure the sealing between the fastener and the mounting hole of the automotive exhaust pipe sensor. Attached Figure Description

[0015] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments and descriptions of the invention are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0016] Figure 1 A schematic diagram of the structure created by this invention;

[0017] Figure 2 For this Figure 1 Left view;

[0018] Figure 3 for Figure 1 A schematic diagram after removing the inner and outer sealing gaskets;

[0019] Figure 4 This is a schematic diagram of an embodiment of the invention with an inverted cone cylinder.

[0020] Figure 5 This is a schematic diagram of an embodiment of the invention where a seal is provided on the connecting section;

[0021] Figure 6 This is a schematic diagram of an embodiment of the present invention with an internal auxiliary sealing gasket. Detailed Implementation

[0022] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0023] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0024] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0025] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0026] A type of automotive exhaust gas sensing fastener, such as Figures 1 to 6 As shown, the device includes a body with a cavity in the middle. The outer wall of the body has a connecting part 1 and an operating part 2. An external groove 3 is provided between the connecting part and the operating part, and the outer diameter of the connecting part is smaller than the outer diameter of the operating part. An external positioning platform 4 is formed on the side of the operating part facing the connecting part, and an external sealing gasket 5 is installed on this external positioning platform. Preferably, the length of the spindle hole section is greater than the length of the connecting part. For example, the operating part adopts an external hexagonal structure. The connecting part adopts an external thread structure.

[0027] In an optional embodiment, such as Figure 4 and Figure 5As shown, an inverted tapered cylinder 16 is provided inside the spindle bore section. The large-diameter end of the inverted tapered cylinder is fixed to the inner wall of the spindle bore section, while the small-diameter end extends towards the side of the spindle bore section away from the inner mating section, and the free end of the small-diameter end does not protrude from the outer end face of the main body. The aforementioned inverted tapered cylinder can prevent some impurities from moving to the sensor position, especially effectively blocking dust or other impurities moving from the inner wall of the spindle bore section towards the sensor, avoiding excessive impurities adhering to the sensor, ensuring the sensor's detection accuracy, and extending the sensor's service life to a certain extent.

[0028] The inner wall of the body is provided with an inner mating section 6 and a main shaft hole section 7. An inner groove 8 is provided between the inner mating section and the main shaft hole section. The inner diameter of the inner mating section is larger than the inner diameter of the main shaft hole section. An inner positioning platform 9 is formed on the side of the main shaft hole section facing the inner mating section. In an optional embodiment, such as... Figure 6 As shown, an inner auxiliary sealing gasket 15 is installed on the inner positioning platform. When the sensor and this fastener are properly engaged, the end face of the sensor housing will abut against the inner auxiliary sealing gasket, improving the sealing performance between the fastener and the sensor. It should be noted that the fastener provided by this invention has an inner groove on its inner wall, which ensures proper assembly between the sensor and the fastener and guarantees the sealing performance between them. An outer groove is provided on the outer wall, which ensures proper installation of the fastener at the mounting hole of the automotive exhaust pipe and guarantees the sealing performance at that location.

[0029] An outer mating section 10 is provided on the side of the inner mating section away from the main shaft hole section. The inner diameter of the outer mating section is larger than that of the inner mating section. A sensor mating platform 11 is formed on the side of the inner mating section facing the outer mating section. An inner sealing gasket 12 is installed on the sensor mating platform. A tapered guide portion 13 is provided at the free end of the outer mating section. The outer sealing gasket is a rubber gasket or an asbestos gasket, and the inner sealing gasket is a rubber gasket or an asbestos gasket.

[0030] In one optional embodiment, the inner mating section includes an internal thread structure. When the sensor housing has a threaded section, this inner mating section structure can be used. The internally threaded section is screwed onto the threaded sensor housing to achieve a stable and reliable connection. In another optional embodiment, the inner mating section has several sealing grooves, and a sealing element 14 is installed in the sealing grooves. For example, the sealing element is a rubber sealing ring. When the sensor housing adopts a plug-in structure design, after the sensor housing is inserted into the inner mating section, the sealing element tightly adheres to the sensor housing, effectively improving the sealing performance.

[0031] This invention features a simple and reasonable structure. The fastener can be easily installed or removed by rotating the operating part on the main body. The inner wall of the fastener is provided with an inner mating part and an outer mating part that fits into the sensor housing. Sealing gaskets are provided at both the outer and inner mating parts to effectively ensure the sealing between the sensor and the fastener. At the same time, an outer sealing gasket is installed on the outer positioning platform on the side of the operating part facing the connection part to ensure the sealing between the fastener and the mounting hole of the automotive exhaust pipe sensor.

[0032] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A fastener for automotive exhaust gas sensing, characterized in that: The device includes a body with a cavity in the middle. The outer wall of the body has a connecting part and an operating part. An external groove is provided between the connecting part and the operating part, and the outer diameter of the connecting part is smaller than the outer diameter of the operating part. An external positioning platform is formed on the side of the operating part facing the connecting part, and an external sealing gasket is installed on this external positioning platform. The inner wall of the body has an inner mating section and a spindle hole section. An internal groove is provided between the inner mating section and the spindle hole section. The inner diameter of the inner mating section is larger than the inner diameter of the spindle hole section. An internal positioning platform is formed on the side of the spindle hole section facing the inner mating section. An outer mating section is provided on the side of the inner mating section away from the spindle hole section. The inner diameter of the outer mating section is larger than the inner diameter of the inner mating section. A sensor mating platform is formed on the side of the inner diameter of the inner mating section facing the outer mating section. An internal sealing gasket is installed on this sensor mating platform. A conical guide is provided at the free end of the outer mating section.

2. The automotive exhaust gas sensing fastener according to claim 1, characterized in that: The operating part adopts an external hexagonal structure.

3. The automotive exhaust gas sensing fastener according to claim 1, characterized in that: The connecting part adopts an external thread structure.

4. The automotive exhaust gas sensing fastener according to claim 1, characterized in that: The outer sealing gasket is made of rubber or asbestos, and the inner sealing gasket is made of rubber or asbestos.

5. The automotive exhaust gas sensing fastener according to claim 1, characterized in that: The internal mating section includes an internal thread structure.

6. The automotive exhaust gas sensing fastener according to claim 1, characterized in that: The inner mating section is provided with several sealing grooves, and sealing elements are installed in the sealing grooves.

7. The automotive exhaust gas sensing fastener according to claim 6, characterized in that: The sealing element is a rubber sealing ring.

8. A fastener for automotive exhaust gas sensing according to any one of claims 1 to 7, characterized in that: The length of the spindle hole section is greater than the length of the connecting part.

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