A ceramic terminal for connecting an automobile oxygen sensor

Abstract

The utility model discloses a kind of ceramic terminals for automobile oxygen sensor wiring connection, it is related to wiring terminal technical field, including ceramic terminal, the connecting line is fixedly connected in the ceramic terminal top end surface, the utility model is rotated by connecting piece on ceramic terminal thread, and make connecting piece and ceramic terminal abut, then reset spring's recovery force is pushed slider in movable bin reset sliding, and make slider drive insertion rod insert socket, to reach the purpose of rotating locking of connecting piece, prevent the high-frequency vibration of continuous in automobile driving, lead to threaded cooperation gap gradually expand, the pretightening force of threaded pair can gradually attenuate, cause the situation of connecting piece and ceramic terminal connection loose even drop, further improve the stability of connecting piece and ceramic terminal connection, while ensure the stability of connecting piece and ceramic terminal signal transmission.

Description

Technical Field

[0001] This utility model relates to the field of wiring terminal technology, specifically a ceramic terminal for wiring connection of automotive oxygen sensor. Background Technology

[0002] Ceramic terminals for automotive oxygen sensor wiring connections are crucial electronic components developed with advancements in modern automotive emission control technology. Their design stems from the performance limitations of traditional metal terminals in high-temperature, corrosive gas, and electrochemical environments. During oxygen sensor operation, exhaust temperatures can reach 400-900℃, and the sensors must withstand long-term corrosion from acidic substances produced by fuel combustion. Traditional metal materials are prone to oxidation, creep, or increased contact resistance, leading to signal transmission distortion. Ceramic materials (such as alumina and aluminum nitride) are chosen as ideal alternatives due to their excellent high-temperature stability, insulation, and corrosion resistance. Through precision ceramic molding and metallization processes, reliable signal transmission under extreme conditions is ensured, while also meeting the miniaturization requirements of sensors. Furthermore, they satisfy the increasingly stringent global emission regulations, such as Euro VI and China VI, which demand both sensor accuracy and durability, making them key interface materials in modern automotive intelligent emission control systems.

[0003] Currently, ceramic terminals and metal connectors used for automotive oxygen sensor wiring connections typically employ threaded mechanical connections. However, in practical applications, due to the continuous high-frequency vibration and temperature cycling during vehicle operation, the difference in thermal expansion coefficients between the ceramic material and the metal parts can easily lead to a gradual increase in the thread fit clearance. In addition, the fretting wear and stress relaxation caused by vibration can gradually reduce the preload of the threaded pair, resulting in loosening or even detachment of the connection. This loosening not only increases contact resistance and affects signal transmission stability, but also urgently requires improvement. Utility Model Content

[0004] The purpose of this invention is to provide a ceramic terminal for wiring connections of automotive oxygen sensors, in order to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a ceramic terminal for wiring connection of an automotive oxygen sensor, comprising a ceramic terminal, a connecting wire fixedly connected to the top surface of the ceramic terminal, a connector connected to the bottom surface of the ceramic terminal by a thread, and a locking component provided between the ceramic terminal and the connector, wherein the ceramic terminal locks the connector by the locking component;

[0006] The locking assembly includes a movable chamber disposed on the front surface of the ceramic terminal, a slider slidably connected inside the movable chamber, a pull rod fixedly connected to the side of the slider facing away from the ceramic terminal, a return spring wound around the surface of the pull rod in the movable chamber, a guide groove formed on the bottom surface of the movable chamber and communicating with the interior of the movable chamber, an insertion rod fixedly connected to the surface of the slider in the guide groove, and a socket fixedly connected to the outer wall of the connector corresponding to the other end of the insertion rod, the socket being slidably connected to the insertion rod.

[0007] As a further preferred embodiment of this technical solution, the pull rod is positioned at the middle of the slider surface, and the pull rod drives the slider to slide back and forth within the movable chamber.

[0008] As a further preferred embodiment of this technical solution, one end of the reset spring is welded to the surface of the slider, and the other end of the reset spring is welded to the inner wall of the movable chamber.

[0009] As a further preferred embodiment of this technical solution, a storage assembly is provided on the side of the ceramic terminal. The storage assembly includes a fixed seat disposed on the outer left side of the ceramic terminal. A rotating rod is rotatably connected inside the fixed seat. A winding reel is fixedly sleeved on the surface of the rotating rod. A ratchet is fixedly connected to the front end surface of the rotating rod. A rotating groove is formed on the surface of the fixed seat to the right of the ratchet. A brake rod is rotatably connected inside the rotating groove. A torsion spring is wound on the surface of the brake rod in the rotating groove. A limit block is fixedly connected to the outer end surface of the brake rod. The limit block engages with the ratchet.

[0010] As a further preferred embodiment of this technical solution, a sealing ring is glued to the surface of the connector facing the ceramic terminal, and the diameter of the sealing ring is equal to the diameter of the connector.

[0011] As a further preferred embodiment of this technical solution, the torsion spring is wound around the middle section surface of the brake lever, and both ends of the torsion spring are welded to the inner wall of the rotating groove.

[0012] As a further preferred embodiment of this technical solution, the middle surface of the winding reel is provided with anti-slip texture, and both sides of the winding reel are designed with rounded corners.

[0013] This utility model provides a ceramic terminal for wiring connection of automotive oxygen sensors, which has the following advantages:

[0014] 1. This utility model uses a connector that rotates threadedly on a ceramic terminal, causing the connector to abut against the ceramic terminal. Then, the restoring force of a return spring pushes a slider to slide back in the movable chamber, causing the slider to drive the insertion rod into the socket. This achieves the purpose of locking the connector's rotation, preventing the continuous high-frequency vibration during vehicle operation from causing the threaded fit clearance to gradually widen and the preload of the threaded pair to gradually decrease, which could lead to loosening or even detachment of the connector from the ceramic terminal. This further improves the stability of the connection between the connector and the ceramic terminal, while also ensuring the stability of signal transmission between the connector and the ceramic terminal.

[0015] 2. This utility model involves winding the connecting wire once onto a reel, then using a ratchet to drive a rotating rod within a fixed base. The rotating rod simultaneously drives the reel to wind up the excess length of the connecting wire. As the ratchet rotates, it continuously acts on a limiting block, causing the limiting block to rotate out of the ratchet's toothed groove and drive a brake rod to rotate within the groove, thus twisting a torsion spring. Once the reel has finished winding, the restoring force of the torsion spring causes the brake rod to reset and rotate within the groove, engaging the limiting block with the ratchet's toothed groove. This achieves the purpose of winding up the connecting wire, reducing its footprint and thus making it portable and easy to store. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0017] Figure 2 This is a partial cross-sectional structural diagram of the storage component of this utility model;

[0018] Figure 3 This is a partial cross-sectional structural diagram of the locking component of this utility model;

[0019] Figure 4 This utility model Figure 2 Enlarged view of point A in the middle.

[0020] In the diagram: 1. Ceramic terminal; 2. Connecting wire; 3. Connector; 4. Locking assembly; 41. Movable compartment; 42. Slider; 43. Return spring; 44. Pull rod; 45. Guide groove; 46. Insert rod; 47. Socket; 5. Storage assembly; 51. Fixing base; 52. Rotating rod; 53. Cable reel; 54. Ratchet; 55. Rotating groove; 56. Brake rod; 57. Torsion spring; 58. Limit block. Detailed Implementation

[0021] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0022] This utility model provides a technical solution: such as Figures 1 to 4As shown, in this embodiment, a ceramic terminal for wiring connection of an automotive oxygen sensor includes a ceramic terminal 1, a connecting wire 2 fixedly connected to the top surface of the ceramic terminal 1, a connector 3 connected to the bottom surface of the ceramic terminal 1 by a thread, and a locking component 4 provided between the ceramic terminal 1 and the connector 3, so that the ceramic terminal 1 locks the connector 3 by the locking component 4.

[0023] The locking assembly 4 includes a movable chamber 41 disposed on the front surface of the ceramic terminal 1. A slider 42 is slidably connected inside the movable chamber 41. A pull rod 44 is fixedly connected to the side of the slider 42 facing away from the ceramic terminal 1. A return spring 43 is wound around the surface of the pull rod 44 in the movable chamber 41. A guide groove 45 is opened on the bottom surface of the movable chamber 41 and is connected to the interior of the movable chamber 41. A plug rod 46 is fixedly connected to the surface of the slider 42 in the guide groove 45. A socket 47 is fixedly connected to the outer wall of the connector 3 corresponding to the other end of the plug rod 46. The socket 47 is slidably connected to the plug rod 46.

[0024] The connector 3 rotates threadedly on the ceramic terminal 1, causing the connector 3 to abut against the ceramic terminal 1. Then, the restoring force of the return spring 43 pushes the slider 42 to return to its original position within the movable chamber 41, causing the slider 42 to drive the insertion rod 46 into the socket 47. This achieves the purpose of locking the connector 3, preventing the continuous high-frequency vibration during vehicle operation from causing the threaded fit clearance to gradually widen and the preload of the threaded pair to gradually decrease, thus preventing the connector 3 from becoming loose or even falling off from the ceramic terminal 1. This further improves the stability of the connection between the connector 3 and the ceramic terminal 1, while ensuring the stability of signal transmission between the connector 3 and the ceramic terminal 1.

[0025] like Figure 3 As shown, the pull rod 44 is positioned at the middle of the surface of the slider 42. The pull rod 44 drives the slider 42 to slide back and forth in the movable chamber 41, which enables the pulling force on the slider 42 to be evenly distributed on the slider 42 when the pull rod 44 pulls the slider 42, thereby improving the stability of the slider 42 sliding back and forth in the movable chamber 41.

[0026] like Figure 3 As shown, one end of the return spring 43 is welded to the surface of the slider 42, and the other end of the return spring 43 is welded to the inner wall of the movable chamber 41. This can increase the connection strength between the two ends of the return spring 43 and the slider 42 and the movable chamber 41, while also limiting the return spring 43 to prevent the vehicle from vibrating continuously, causing the return spring 43 to hit the movable chamber 41 or the slider 42 back and forth in the movable chamber 41, thus causing significant noise pollution.

[0027] like Figure 1 and Figure 2 as well as Figure 4As shown, a storage assembly 5 is provided on the side of the ceramic terminal 1. The storage assembly 5 includes a fixed seat 51 provided on the outer wall of the left side of the ceramic terminal 1. A rotating rod 52 is rotatably connected inside the fixed seat 51. A winding reel 53 is fixedly sleeved on the surface of the rotating rod 52. A ratchet 54 is fixedly connected to the front end surface of the rotating rod 52. A rotating groove 55 is opened on the surface of the fixed seat 51 on the right side of the ratchet 54. A brake rod 56 is rotatably connected inside the rotating groove 55. A torsion spring 57 is wound on the surface of the brake rod 56 in the rotating groove 55. A limit block 58 is fixedly connected to the outer end surface of the brake rod 56. The limit block 58 engages with the ratchet 54.

[0028] The connecting wire 2 is wound once on the reel 53, and then the ratchet 54 drives the rotating rod 52 to rotate within the fixed base 51. The rotating rod 52 synchronously drives the reel 53 to wind up the excess length of the connecting wire 2. While the ratchet 54 is rotating, it continuously acts on the limiting block 58, causing the limiting block 58 to rotate out of the tooth groove on the ratchet 54 and drive the brake rod 56 to rotate within the rotating groove 55, thus twisting the torsion spring 57. When the reel 53 has finished winding up, the restoring force of the torsion spring 57 drives the brake rod 56 to reset and rotate within the rotating groove 55, and causes the limiting block 58 to mesh with the tooth groove on the ratchet 54, thereby achieving the purpose of winding up the connecting wire 2, reducing the area occupied by the connecting wire 2, and thus achieving the purpose of portability and easy storage.

[0029] like Figure 3 As shown, a sealing ring is glued to the side of the connector 3 facing the ceramic terminal 1, and the diameter of the sealing ring is equal to the diameter of the connector 3. When the connector 3 is connected to the ceramic terminal 1 by threads, the connector 3 will drive the sealing ring to continuously fit with the ceramic terminal 1, thereby increasing the sealing performance between the ceramic terminal 1 and the connector 3 and preventing liquid from entering the connector 3 or the ceramic terminal 1 and interfering with its signal transmission.

[0030] like Figure 4 As shown, the torsion spring 57 is wound around the middle section surface of the brake lever 56. Both ends of the torsion spring 57 are welded to the inner wall of the rotating groove 55, which enables the restoring force of the torsion spring 57 to be evenly transmitted to both sections of the brake lever 56, so that the brake lever 56 can rotate stably in the rotating groove 55.

[0031] like Figure 4 As shown, the middle surface of the reel 53 is provided with anti-slip texture, and both sides of the reel 53 are designed with rounded corners, which can improve the friction between the surface of the connecting wire 2 and the reel 53, thereby reducing the occurrence of the connecting wire 2 coming off the reel 53. At the same time, it can also reduce the frictional damage caused by the right angles on both sides of the reel 53 to the surface of the connecting wire 2.

[0032] This utility model provides a ceramic terminal for wiring a car oxygen sensor. The specific working principle is as follows: In use, first pull the lever 44 away from the ceramic terminal 1, causing the lever 44 to drive the slider 42 to slide within the movable chamber 41. The slider 42 continuously presses against the inner wall of the movable chamber 41, causing the return spring 43 to deform. Simultaneously, the slider 42 drives the insertion rod 46 to slide within the guide groove 45. Then, it is threadedly connected to the ceramic terminal 1 via the connector 3, and the connector 3 abuts against the ceramic terminal 1. At this time, the socket 47 is aligned with the insertion rod 46. By releasing the lever 44, the restoring force of the return spring 43 pushes the slider 42 to return to its original position within the movable chamber 41, causing the slider 42 to drive the insertion rod 46 into the socket 47, thereby achieving the purpose of rotating and locking the connector 3.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A ceramic terminal for wiring connection of an automobile oxygen sensor comprising a ceramic terminal (1), characterized by: A connecting wire (2) is fixedly connected to the top surface of the ceramic terminal (1), and a connector (3) is connected to the bottom surface of the ceramic terminal (1) by a thread. A locking component (4) is provided between the ceramic terminal (1) and the connector (3), and the ceramic terminal (1) locks the connector (3) by the locking component (4). The locking assembly (4) includes a movable chamber (41) disposed on the front surface of the ceramic terminal (1). A slider (42) is slidably connected inside the movable chamber (41). A pull rod (44) is fixedly connected to the side surface of the slider (42) facing away from the ceramic terminal (1). A return spring (43) is wound around the surface of the pull rod (44) in the movable chamber (41). A guide groove (45) is opened on the bottom surface of the movable chamber (41), and the guide groove (45) is connected to the inside of the movable chamber (41). A plug rod (46) is fixedly connected to the surface of the slider (42) in the guide groove (45). A socket (47) is fixedly connected to the outer wall of the connector (3) corresponding to the other end of the plug rod (46). The socket (47) is slidably connected to the plug rod (46).

2. The ceramic terminal for wiring connection of an automotive oxygen sensor according to claim 1, characterized in that: The pull rod (44) is located at the middle position on the surface of the slider (42), and the pull rod (44) drives the slider (42) to slide back and forth in the movable chamber (41).

3. The ceramic terminal for wiring connection of an automotive oxygen sensor according to claim 1, characterized in that: One end of the reset spring (43) is welded to the surface of the slider (42), and the other end of the reset spring (43) is welded to the inner wall of the movable chamber (41).

4. The ceramic terminal for wiring connection of an automotive oxygen sensor according to claim 1, characterized in that: A storage assembly (5) is provided on the side of the ceramic terminal (1). The storage assembly (5) includes a fixed seat (51) on the outer left side of the ceramic terminal (1). A rotating rod (52) is rotatably connected inside the fixed seat (51). A winding reel (53) is fixedly sleeved on the surface of the rotating rod (52). A ratchet (54) is fixedly connected to the front end surface of the rotating rod (52). A rotating groove (55) is opened on the surface of the fixed seat (51) on the right side of the ratchet (54). A brake rod (56) is rotatably connected inside the rotating groove (55). A torsion spring (57) is wound around the surface of the brake rod (56) in the rotating groove (55). A limit block (58) is fixedly connected to the outer end surface of the brake rod (56). The limit block (58) meshes with the ratchet (54).

5. A ceramic terminal for wiring connection of an automotive oxygen sensor according to claim 1, characterized in that: A sealing ring is glued to the side surface of the connector (3) facing the ceramic terminal (1), and the diameter of the sealing ring is equal to the diameter of the connector (3).

6. A ceramic terminal for wiring connection of an automotive oxygen sensor according to claim 4, characterized in that: The torsion spring (57) is wound around the middle section surface of the brake lever (56), and both ends of the torsion spring (57) are welded to the inner wall of the rotating groove (55).

7. A ceramic terminal for wiring connection of an automotive oxygen sensor according to claim 4, characterized in that: The middle surface of the winding spool (53) is provided with anti-slip texture, and both sides of the winding spool (53) are designed with rounded corners.

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