Fastener for mounting automobile exhaust sensor

Abstract

The utility model provides a fastener for mounting an automobile exhaust sensor, which comprises a main body, a connecting part and an operating part are arranged on the outer side of the main body, an external thread structure is arranged on the connecting part, and an external hexagonal structure is arranged on the operating part; a mounting cavity is formed in the inner side of the main body, a mounting groove is formed in the middle of the mounting cavity, an inner supporting piece is mounted in the mounting groove, and the width of the inner supporting piece accounts for 1 / 3-2 / 3 of the total width of the main body; a first sealing groove is formed in the side, corresponding to the operation portion, of the installation cavity, a first sealing piece is installed in the first sealing lip, a second sealing groove is formed in the side, corresponding to the connecting portion, of the installation cavity, a second sealing piece is installed in the second sealing groove, and the second sealing groove is located in the end face of the body. The first sealing piece and the sensor are sealed, the second sealing piece and the connecting hole are sealed, the inner supporting piece is used for supporting the sensor shell or the inlet end connecting pipe, the sensor is firmly fixed, the detection precision of the sensor is high, and the reliability of the detection result is guaranteed.

Description

Technical Field

[0001] The present invention belongs to the technical field of automotive parts, and particularly relates to a fastener for installing an automotive exhaust gas sensor. Background Art

[0002] Automotive exhaust gas sensors are important components in automotive emission control systems. During the installation process, fasteners are required to ensure that the sensors can be firmly installed in the automotive exhaust system, so as to ensure that the sensors can accurately detect the exhaust gas components and effectively control emissions. During the installation process, selecting a suitable installation position, cleaning the installation surface, firmly fixing the sensor with fasteners, and then firmly connecting the sensor connection harness to the vehicle-mounted computer are all key steps to ensure the normal operation of the sensor. Under certain working conditions, during the installation and use process, not only the stable installation of the sensor needs to be ensured, but also a good seal needs to be ensured at the intake port position of the sensor to prevent exhaust gas leakage and affect the detection accuracy of the sensor. Most of the existing fasteners use nut locking, which cannot well ensure a firm connection and reliable sealing with the sensor and the intake port position of the sensor. Therefore, it is necessary to improve the existing fasteners. Summary of the Invention

[0003] In view of this, the present invention aims to overcome the defects in the prior art and proposes a fastener for installing an automotive exhaust gas sensor.

[0004] To achieve the above object, the technical solution of the present invention is realized as follows:

[0005] A fastener for installing an automotive exhaust gas sensor includes a main body. A connection part and an operation part are provided on the outer side of the main body. An external thread structure is provided on the connection part, and an external hexagonal structure is provided on the operation part. An installation cavity is provided inside the main body. An installation groove is provided in the middle of the installation cavity, and an inner support member is installed in the installation groove. The width of the inner support member accounts for 1 / 3 - 2 / 3 of the total width of the main body. A first sealing groove is provided on one side of the installation cavity corresponding to the operation part, and a first sealing member is installed in the first sealing lip. A second sealing groove is provided on one side of the installation cavity corresponding to the connection part, and a second sealing member is installed in the second sealing groove. And the second sealing groove is located at the end face of the main body. The first sealing member is a high-temperature resistant rubber ring.

[0006] Further, the inner support member is integrally annular.

[0007] Further, the width of the inner support member accounts for 1 / 3 - 1 / 2 of the total width of the main body.

[0008] Further, the high-temperature resistant rubber ring is a PTFE rubber ring or a fluororubber ring.

[0009] Further, the inner support member protrudes from the installation groove by 0.5 - 1.5 mm.

[0010] Furthermore, the inner support member is made of PTFE material.

[0011] Furthermore, the second sealing member is made of a high temperature resistant rubber pad.

[0012] Furthermore, the high temperature resistant rubber ring is made of PTFE rubber pad or fluororubber pad.

[0013] Compared with the prior art, the present invention has the following advantages:

[0014] The fastener provided by the invention does not require fine processing of the inner cavity of the main body, the first seal is sealed with the sensor, the second seal is sealed with the connecting hole, and the sensor housing or the inlet end pipe is supported by the inner support member to firmly fix the sensor. At the same time, the inner support member can also play a buffering and shock-absorbing role to a certain extent. Therefore, the sensor has high detection accuracy and the reliability of the detection result is guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings constituting part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments and descriptions of the present invention are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

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

[0017] Figure 2 This is a schematic diagram of the structure of the inner support member in the invention;

[0018] Figure 3 It is a schematic diagram of the structure of the main body in the invention. DETAILED DESCRIPTION

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

[0020] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0021] In the description of the invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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 invention can be understood according to specific circumstances.

[0022] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0023] A fastener for mounting an automobile exhaust sensor, such as Figures 1 to 3 As shown, it includes a main body, a connecting part 1 and an operating part 2 are arranged on the outside of the main body, the main body can be made of stainless steel material, which is durable and not easy to corrode, and a back-off groove 3 is left between the operating part and the connecting part for easy processing and manufacturing. The connecting part is provided with an external thread structure, and the operating part is provided with an external hexagonal structure.

[0024] An installation cavity is provided on the inner side of the main body, and an installation groove 4 is provided in the middle of the installation cavity. An inner support member 5 is installed in the installation groove. The width of the inner support member accounts for 1 / 3-2 / 3 of the total width of the main body. With the help of the inner support member, the sensor housing or the inlet end pipe can be effectively supported and fixed. The fastener fits tightly with the sensor to ensure that the sensor is stably and securely fixed, and the inner support member can also play a role in buffering and shock absorption.

[0025] A first sealing groove 6 is provided on the side of the installation cavity corresponding to the operating part, and a first sealing member 7 is installed in the first sealing lip. A second sealing groove 8 is provided on the side of the installation cavity corresponding to the connecting part, and a second sealing member 9 is installed in the second sealing groove. The second sealing groove is located at the end face of the main body, and the first sealing member adopts a high temperature resistant rubber ring. The first sealing member can achieve sealing with the sensor housing or the inlet end pipe, and the second sealing member can achieve sealing with the bottom of the connecting hole (of the mounting surface of the sensor installation position), ensuring good sealing between the fastener and the sensor, avoiding gas leakage, and ensuring the reliability of the sensor detection result.

[0026] The inner support member is annular as a whole, and inclined guide surfaces 10 are respectively provided at both ends of the inner wall of the inner support member. Preferably, the width of the inner support member accounts for 1 / 3-1 / 2 of the total width of the main body. The high temperature resistant rubber ring is a PTFE rubber ring or a fluororubber ring. In an optional embodiment, the inner support member protrudes from the mounting groove by 0.5-1.5mm. The inner support member is made of PTFE material. The second sealing member is a high temperature resistant rubber pad. Usually, the high temperature resistant rubber ring is a PTFE rubber pad or a fluororubber pad.

[0027] The fastener provided by the invention does not require fine processing of the inner cavity of the main body, the first seal is sealed with the sensor, the second seal is sealed with the connecting hole, and the sensor housing or the inlet end pipe is supported by the inner support member to firmly fix the sensor. At the same time, the inner support member can also play a buffering and shock-absorbing role to a certain extent. Therefore, the sensor has high detection accuracy and the reliability of the detection result is guaranteed.

[0028] The above description is only 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 principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A fastener for installing an automotive exhaust gas sensor, characterized in that: It includes a main body, with a connecting part and an operating part provided on the outer side of the main body. An external thread structure is provided on the connecting part, and an external hexagonal structure is provided on the operating part. An installation cavity is provided inside the main body, and an installation groove is provided in the middle of the installation cavity. An internal support member is installed in the installation groove, and the width of the internal support member accounts for 1 / 3 - 2 / 3 of the total width of the main body. A first sealing groove is provided on one side of the installation cavity corresponding to the operating part, and a first sealing member is installed in the first sealing groove. A second sealing groove is provided on one side of the installation cavity corresponding to the connecting part, and a second sealing member is installed in the second sealing groove. Moreover, the second sealing groove is located at the end face of the main body. The first sealing member is a high-temperature resistant rubber ring.

2. The fastener for installing an automotive exhaust gas sensor according to claim 1, characterized in that: The internal support member is integrally annular.

3. The fastener for installing an automotive exhaust gas sensor according to claim 1, characterized in that: The width of the internal support member accounts for 1 / 3 - 1 / 2 of the total width of the main body.

4. The fastener for installing an automotive exhaust gas sensor according to claim 1, wherein: The high-temperature resistant rubber ring is a PTFE rubber ring or a fluororubber ring.

5. The fastener for installing an automotive exhaust gas sensor according to claim 4, wherein: The internal support member protrudes from the installation groove by 0.5 - 1.5 mm.

6. The fastener for installing an automotive exhaust gas sensor according to claim 4, characterized in that: The internal support member is made of PTFE material.

7. A fastener for installing an automotive exhaust gas sensor according to claim 1, characterized in that: The second sealing member is a high-temperature resistant rubber gasket.

8. A fastener for installing an automotive exhaust gas sensor according to claim 1, characterized in that: The high-temperature resistant rubber ring is a PTFE rubber gasket or a fluororubber gasket.

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