Electrode connection structure, oxygen sensor, engine and vehicle

Abstract

The utility model relates to an electrode connection structure, an oxygen sensor, an engine and a vehicle. The electrode connection structure comprises at least one electrode terminal and a terminal seat. The terminal seat comprises a first terminal seat and a second terminal seat which are arranged in a split manner; wherein the electrode terminal is fixedly connected with the first terminal seat and the second terminal seat respectively. The objective of the utility model is to solve the technical problems that an electrode connection structure cannot release fatigue stress caused by vibration and poor contact exists in the prior art.

Description

Technical Field

[0001] This application relates to the field of oxygen sensor technology, and more particularly to an electrode connection structure, an oxygen sensor, an engine, and a vehicle. Background Technology

[0002] In related technologies, the oxygen sensor chip and wires are electrically connected via an electrode connection device. One electrode connection structure is an integrated structure, where the electrode terminals are unidirectionally inserted into the ceramic terminal block. In practical use, this integrated structure cannot effectively release fatigue stress caused by complex vibrations, reducing the lifespan of the electrode terminals. Another type is a segmented structure, where the lower terminal block fixes the electrode terminals, while the upper terminal block provides support but no fixing function. This makes the electrode terminals susceptible to lateral stress and response deformation under complex vibrations, leading to poor contact between the electrode terminals and the chip. Utility Model Content

[0003] This application provides an electrode connection structure, an oxygen sensor, an engine, and a vehicle. The purpose of this application is to solve the technical problems in the related art where the electrode connection structure cannot release the fatigue stress caused by vibration and has poor contact.

[0004] To achieve the above objectives, according to a first aspect of this application, an electrode connection structure is provided, comprising:

[0005] At least one electrode terminal; and

[0006] Terminal block, including a first terminal block and a second terminal block that are separately configured;

[0007] The electrode terminals are fixedly connected to the first terminal block and the second terminal block, respectively.

[0008] Optionally, the first terminal block and the second terminal block are arranged along the axial direction of the terminal block;

[0009] One end of the electrode terminal is fixedly connected to the first terminal block, and the other end of the electrode terminal is fixedly connected to the second terminal block.

[0010] Optionally, the first terminal block is provided with a first snap-fit ​​cavity;

[0011] The electrode terminal includes a first snap-fit ​​component, which snaps into the first snap-fit ​​cavity.

[0012] Optionally, the cavity wall of the first snap-fit ​​cavity is provided with a first limiting groove;

[0013] The first snap-fit ​​component includes a first limiting piece, which snaps into the first limiting groove.

[0014] Optionally, the first limiting piece includes a first limiting part and a second limiting part connected to each other, the second limiting part being inclined relative to the first limiting part, and the second limiting part being engaged in the first limiting groove.

[0015] Optionally, the second limiting part is an elastic structure.

[0016] Optionally, the second limiting portion is connected to one end of the first limiting portion near the second terminal block, and is inclined relative to the first limiting portion toward the axis away from the first snap-fit ​​cavity.

[0017] Optionally, one end of the first limiting groove passes through the end of the first terminal block away from the second terminal block, and the end wall of the other end of the first limiting groove abuts against the second limiting part.

[0018] Optionally, the first limiting portion abuts against the cavity wall of the first snap-fit ​​cavity to restrict the first snap-fit ​​member from rotating around the axis of the first snap-fit ​​cavity.

[0019] Optionally, the electrode terminal further includes a first steering barrier piece, which is disposed on the first snap-fit ​​member and abuts against the cavity wall of the first snap-fit ​​cavity, for limiting the rotation of the first snap-fit ​​member around the axis of the first snap-fit ​​cavity.

[0020] Optionally, the second terminal block is provided with a second snap-fit ​​cavity;

[0021] The electrode terminal further includes a second snap-fit ​​member, which is disposed at one end of the first snap-fit ​​member near the second terminal block, and the second snap-fit ​​member snaps into the second snap-fit ​​cavity.

[0022] Optionally, the cavity wall of the second snap-fit ​​cavity is provided with a second limiting groove;

[0023] The second snap-fit ​​component includes a second limiting piece, which snaps into the second limiting groove.

[0024] Optionally, the second limiting piece includes a third limiting part and a fourth limiting part that are connected to each other. The fourth limiting part is inclined relative to the third limiting part and is engaged in the second limiting groove.

[0025] Optionally, the fourth limiting part is an elastic structure.

[0026] Optionally, the fourth limiting part is connected to the end of the third limiting part near the first terminal block, and is inclined relative to the third limiting part toward the axis away from the second snap-fit ​​cavity.

[0027] Optionally, one end of the second limiting groove passes through the end of the second terminal block away from the first terminal block, and the end wall of the other end of the second limiting groove abuts against the fourth limiting part.

[0028] Optionally, the third limiting portion abuts against the cavity wall of the second snap-fit ​​cavity to restrict the second snap-fit ​​member from rotating around the axis of the second snap-fit ​​cavity.

[0029] Optionally, the electrode terminal further includes a second steering barrier piece, which abuts against the cavity wall of the second snap-fit ​​cavity to restrict the second snap-fit ​​member from rotating about the axis of the first snap-fit ​​cavity.

[0030] Optionally, the second limiting portion and the fourth limiting portion have opposite inclination directions.

[0031] Optionally, the electrode terminal further includes a contact member connected to one end of the first snap-fit ​​member, the contact member being used to abut against the chip to mount the chip.

[0032] Optionally, the first terminal block and the second terminal block are snap-fitted together.

[0033] According to a second aspect of this application, an oxygen sensor is provided, including the electrode connection structure and chip as described above, wherein the chip is in contact with the electrode terminals.

[0034] According to a third aspect of this application, an engine is provided, including the oxygen sensor described above.

[0035] According to a fourth aspect of this application, a vehicle is provided, including the oxygen sensor described above.

[0036] The beneficial effects of this application are:

[0037] The electrode connection structure provided in this application is simple in structure, can release fatigue stress caused by vibration, avoid damage to electrode terminals, and improve the service life of the electrode connection structure. Since the first terminal block and the second terminal block are set separately, part of the fatigue stress caused by vibration is dissipated from the connection between the first terminal block and the second terminal block, and the other part of the fatigue stress is applied to the first terminal block and the second terminal block respectively, avoiding fatigue stress concentration and damage to the electrode terminals, thus improving the service life of the electrode connection structure. The electrode terminals are fixedly connected to the first terminal block and the second terminal block, thereby preventing the electrode terminals from becoming loose.

[0038] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0039] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0040] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0041] Figure 1 This is a schematic diagram (including a chip) of one embodiment of the electrode connection structure provided in this application;

[0042] Figure 2 yes Figure 1 Exploded view of the middle electrode connection structure;

[0043] Figure 3 yes Figure 1 A cross-sectional view of the middle electrode connection structure;

[0044] Figure 4 yes Figure 1 Schematic diagram of the middle electrode terminal;

[0045] Figure 5 yes Figure 1 Schematic diagram of the structure of the first terminal block;

[0046] Figure 6 yes Figure 1 A schematic diagram of the structure of the second terminal block.

[0047] Explanation of reference numerals in the attached figures:

[0048] 100. Electrode connection structure; 1. Electrode terminal; 11. First snap-fit ​​component; 12. First limiting piece; 121. First limiting part; 122. Second limiting part; 13. Second snap-fit ​​component; 14. Second limiting piece; 141. Third limiting part; 142. Fourth limiting part; 15. Contact component; 16. First steering barrier piece; 17. Second steering barrier piece; 2. First terminal block; 21. First snap-fit ​​cavity; 22. First limiting groove; 3. Second terminal block; 31. Second snap-fit ​​cavity; 32. Second limiting groove;

[0049] 200. Chip. Detailed Implementation

[0050] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0051] In related technologies, the oxygen sensor chip and wires are electrically connected via an electrode connection device. One electrode connection structure is an integrated structure, where the electrode terminals are unidirectionally inserted into the ceramic terminal block. In practical use, this integrated structure cannot effectively release fatigue stress caused by complex vibrations, reducing the lifespan of the electrode terminals. Another type is a segmented structure, where the lower terminal block fixes the electrode terminals, while the upper terminal block provides support but no fixing function. This makes the electrode terminals susceptible to lateral stress and response deformation under complex vibrations, leading to poor contact between the electrode terminals and the chip.

[0052] In view of this, this application proposes an electrode connection structure 100. Figures 1 to 6 This is a schematic diagram of an embodiment of the electrode connection structure 100 provided in this application. The electrode connection structure 100 provided in this application can release fatigue stress caused by vibration and improve the service life of the electrode connection structure 100. The electrode connection structure 100 will be described in detail below with reference to the main drawings.

[0053] According to the first aspect of this application, referring to Figures 1 to 2 This application provides an electrode connection structure 100, which includes at least one electrode terminal 1 and a terminal base; the terminal base includes a first terminal base 2 and a second terminal base 3 that are separately disposed; wherein the electrode terminal 1 is fixedly connected to the first terminal base 2 and the second terminal base 3 respectively.

[0054] The electrode connection structure 100 provided in this application has a simple structure, can release fatigue stress caused by vibration, avoid damage to electrode terminals 1, and improve the service life of electrode connection structure 100. Since the first terminal block 2 and the second terminal block 3 are separately set, part of the fatigue stress caused by vibration is dissipated from the connection between the first terminal block 2 and the second terminal block 3, and the other part of the fatigue stress is applied to the first terminal block 2 and the second terminal block 3 respectively, avoiding fatigue stress concentration and damage to electrode terminals 1, thus improving the service life of electrode connection structure 100. The electrode terminals 1 are fixedly connected to the first terminal block 2 and the second terminal block 3, thereby preventing the electrode terminals 1 from becoming loose.

[0055] For details, please continue reading Figure 1 and Figure 2The first terminal block 2 and the second terminal block 3 are arranged along the axial direction of the terminal blocks. One end of the electrode terminal 1 is fixedly connected to the first terminal block 2, and the other end of the electrode terminal 1 is fixedly connected to the second terminal block 3. This arrangement ensures the stability of the structure by fixing a portion of the electrode terminal 1 to the first terminal block 2 and fixing the other portion of the electrode terminal 1 to the second terminal block 3.

[0056] Please see Figure 3 and Figure 4 The electrode terminal 1 includes a first snap-fit ​​member 11, a second snap-fit ​​member 13, and a contact member 15. The first snap-fit ​​member 11 is connected to the second snap-fit ​​member 13, and the contact member 15 is connected to the end of the first snap-fit ​​member 11 away from the second snap-fit ​​member 13. The first snap-fit ​​member 11 is fixed to the first terminal block 2, the second snap-fit ​​member 13 is fixed to the second terminal block 3, and the contact member 15 is used to contact the chip 200.

[0057] It should be noted that the connection method between the first snap-fit ​​connector 11 and the first terminal block 2 is not limited, as long as the first snap-fit ​​connector 11 can be fixed on the first terminal block 2. Specifically, in this embodiment, the first terminal block 2 is provided with a first snap-fit ​​cavity 21; the first snap-fit ​​connector 11 snaps into the first snap-fit ​​cavity 21. This makes operation simpler and installation more convenient. It should also be noted that the number of electrode terminals is not limited, and can be set according to the electrode contacts on the chip. For example, in some embodiments, the chip has one electrode contact, and the number of electrode terminals is set to one, with the contact of the electrode terminal contacting the electrode contact on the chip. In other embodiments, the chip has four electrode contacts, and the number of electrode terminals is set to four, with each electrode contact corresponding to one electrode terminal, so that the contact of the electrode terminal contacts the electrode contact on the chip.

[0058] Please see Figure 3 and Figure 5 During installation, electrode terminal 1 is inserted into first terminal block 2. The cavity wall of first locking cavity 21 is provided with first limiting groove 22. First locking member 11 includes first limiting piece 12, which is locked into first limiting groove 22. When first locking member 11 is locked into first locking cavity 21, the first limiting piece 12 abuts against first limiting groove 22, indicating that first locking member 11 is fixed. This configuration limits the axial movement of electrode terminal 1, preventing electrode terminal 1 from detaching from chip 200 and improving the stability of electrode connection structure 100.

[0059] It should be noted that the specific structure of the first limiting piece 12 is not limited, as long as it can axially limit the first snap-fit ​​member 11. In this embodiment, the first limiting piece 12 includes a first limiting part 121 and a second limiting part 122 connected to each other. The second limiting part 122 is inclined relative to the first limiting part 121 and snaps into the first limiting groove 22. Specifically, when the first snap-fit ​​member 11 is snapped into the first terminal seat 2, the first limiting part 121 slides along the cavity wall of the first snap-fit ​​cavity 21 to achieve a guiding function. The second limiting part 122 is disposed in the first limiting groove 22 and cooperates with the first limiting groove 22 to axially limit the first snap-fit ​​member 11.

[0060] Specifically, to facilitate the engagement of the second limiting part 122 with the first limiting groove 22, the second limiting part 122 is an elastic structure. More specifically, the second limiting part 122 is a spring piece.

[0061] In some embodiments, the second limiting portion 122 is connected to one end of the first limiting portion 121 near the second terminal block 3, and is inclined relative to the first limiting portion 121 toward the axis away from the first latching cavity 21. This arrangement allows the second limiting portion 122 to elastically deform. When the first limiting member enters the first latching cavity 21, the second limiting portion 122 can deform toward the axis of the first latching cavity 21, making the installation of the first latching member 11 more convenient. When the first latching member 11 is latched into the appropriate position, the second limiting portion 122 can spring back toward the axis away from the first latching cavity 21, latching into the first limiting groove 22 and cooperating with the first limiting groove 22 to fix the first latching member 11 on the first terminal block 2.

[0062] Furthermore, when the first snap-fit ​​member 11 is installed in the first snap-fit ​​cavity 21, the first limiting part 121 can abut against the cavity wall of the first snap-fit ​​cavity 21, thereby restricting the first snap-fit ​​member 11 from rotating around the axis of the first snap-fit ​​cavity 21, achieving radial fixation, thereby ensuring the stability of the electrode connection structure 100.

[0063] It should be noted that the specific type of the first limiting groove 22 is not limited, as long as it can cooperate with the second limiting part 122. In this embodiment, one end of the first limiting groove 22 passes through the end of the first terminal block 2 away from the second terminal block 3, and the end wall of the other end of the first limiting groove 22 abuts against the second limiting part 122. This arrangement facilitates the installation of the electrode terminal 1. Specifically, during actual installation, the electrode terminal 1 enters from the direction of the second snap-fit ​​member 13. Since the first limiting groove 22 passes through the end of the first terminal block away from the second terminal block, the second elastic member can slide within the first limiting groove 22 until the second limiting part 122 abuts against the bottom of the first limiting groove 22. At this time, the first limiting member and the first terminal block 2 are fixed.

[0064] Furthermore, in some embodiments, the electrode terminal 1 further includes a first steering barrier piece 16, which is disposed on the first snap-fit ​​member 11 and abuts against the cavity wall of the first snap-fit ​​cavity 21, for restricting the first snap-fit ​​member 11 from rotating about the axis of the first snap-fit ​​cavity 21.

[0065] It should be noted that in some embodiments, the first steering barrier 16 corresponds directly to the first limiting part 121. This arrangement allows the first steering barrier 16 to cooperate with the first limiting part 121 to restrict the first snap-fit ​​member 11 from rotating around the axis of the first snap-fit ​​cavity 21, thereby improving the stability of the electrode connection structure 100.

[0066] It should be noted that the connection method between the second snap-fit ​​member 13 and the second terminal block 3 is not limited, as long as the second snap-fit ​​member 13 can be fixed on the second terminal block 3. Specifically, in this embodiment, the second terminal block 3 is provided with a second snap-fit ​​cavity 31; the second snap-fit ​​member 13 snaps into the second snap-fit ​​cavity 31. Please refer to... Figure 4 and Figure 6 During installation, electrode terminal 1 is inserted into the second terminal block 3. The cavity wall of the second locking cavity 31 is provided with a second limiting groove 32. The second locking member 13 includes a second limiting piece 14, which is locked into the second limiting groove 32. When the second locking member 13 is locked into the second locking cavity 31, when the second limiting piece 14 abuts against the second limiting groove 32, it indicates that the second locking member 13 is fixed. This setting can limit the axial movement of electrode terminal 1, prevent electrode terminal 1 from detaching from chip 200, and improve the stability of electrode connection structure 100.

[0067] It should be noted that the specific structure of the second limiting piece 14 is not limited, as long as it can axially limit the second snap-fit ​​member 13. In this embodiment, the second limiting piece 14 includes a third limiting part 141 and a fourth limiting part 142 connected to each other. The fourth limiting part 142 is inclined relative to the third limiting part 141 and snaps into the second limiting groove 32. Specifically, when the second snap-fit ​​member 13 is snapped into the second terminal seat 3, the third limiting part 141 slides along the cavity wall of the second snap-fit ​​cavity 31 to achieve a guiding function, and the fourth limiting part 142 is disposed in the second limiting groove 32 and cooperates with the second limiting groove 32 to axially limit the second snap-fit ​​member 13.

[0068] Specifically, to facilitate the engagement of the fourth limiting part 142 with the second limiting groove 32, the fourth limiting part 142 is an elastic structure. More specifically, the fourth limiting part 142 is a spring piece.

[0069] In some embodiments, the fourth limiting portion 142 is connected to the end of the third limiting portion 141 near the first terminal block 2, and is inclined relative to the third limiting portion 141 toward the axis away from the second latching cavity 31. This arrangement allows the fourth limiting portion 142 to elastically deform. When the second limiting member enters the first latching cavity 21, the fourth limiting portion 142 can deform toward the axis of the second latching cavity 31, making the installation of the second latching member 13 more convenient. When the second latching member 13 is latched into the appropriate position, the fourth limiting portion 142 can spring back toward the axis away from the second latching cavity 31, latching into the second limiting groove 32 and cooperating with the second limiting groove 32 to fix the second latching member 13 onto the second terminal block 3.

[0070] Furthermore, when the second snap-fit ​​member 13 is installed in the second snap-fit ​​cavity 31, the third limiting part 141 can abut against the cavity wall of the second snap-fit ​​cavity 31, thereby restricting the second snap-fit ​​member 13 from rotating around the axis of the second snap-fit ​​cavity 31, achieving radial fixation, and thus ensuring the stability of the electrode connection structure 100.

[0071] It should be noted that the specific type of the second limiting groove 32 is not limited, as long as it can cooperate with the fourth limiting part 142. In this embodiment, one end of the second limiting groove 32 passes through the end of the second terminal block 3 away from the first terminal block 2, and the end wall of the other end of the second limiting groove 32 abuts against the fourth limiting part 142. This arrangement facilitates the installation of the electrode terminal 1. Specifically, during actual installation, after the first snap-fit ​​member 11 is snapped into the first terminal block 2, the second snap-fit ​​member 13 needs to be snapped into and fixed to the second terminal block. The end of the second snap-fit ​​member 13 away from the first snap-fit ​​member 11 enters the second snap-fit ​​cavity 31 from the direction of the second terminal block 3 near the first terminal block 2. Since the second limiting groove 32 does not penetrate the end of the second terminal block 3 near the first terminal block 2, when the second snap-fit ​​member 13 is snapped in, the fourth limiting part 142 undergoes elastic deformation in the axial direction of the second snap-fit ​​cavity 31, so that the second snap-fit ​​member 13 can enter the second snap-fit ​​cavity 31. When the fourth limiting part 142 enters the second limiting groove 32, the fourth limiting part 142 abuts against the groove wall of the second limiting part, thus completing the fixation of the second limiting member and the second terminal block 3.

[0072] Furthermore, in some embodiments, the electrode terminal 1 further includes a second steering barrier 17, which is disposed on the second snap-fit ​​member 13 and abuts against the cavity wall of the second snap-fit ​​cavity 31, for restricting the second snap-fit ​​member 13 from rotating about the axis of the second snap-fit ​​cavity 31.

[0073] It should be noted that in some embodiments, the second steering barrier 17 corresponds directly to the third limiting part 141. This arrangement allows the second steering barrier 17 and the third limiting part 141 to cooperate in restricting the second snap-fit ​​member 13 from rotating around the axis of the second snap-fit ​​cavity 31, thereby improving the stability of the electrode connection structure 100.

[0074] Please see Figure 3 The first terminal block 2 and the second terminal block 3 are snap-fitted together. In this embodiment, the first terminal block 2 has a snap-fit ​​part at one end near the second terminal block 3, and the second terminal block 3 has a snap-fit ​​mating part at one end near the first terminal block 2. The snap-fit ​​mating part engages with the snap-fit ​​part to fix the first terminal block 2 and the second terminal block 3 relative to each other.

[0075] Furthermore, in some embodiments, the snap-fit ​​part is a snap-fit ​​boss, and the snap-fit ​​mating part is a snap-fit ​​groove. The size of the snap-fit ​​groove is slightly larger than the size of the snap-fit ​​boss. With this configuration, when the electrode connection structure 100 vibrates, the first terminal block 2 can be slightly bent relative to the second terminal block 3, thereby eliminating fatigue stress and avoiding fatigue stress concentration, which could lead to damage to the electrode terminal 1.

[0076] In some embodiments, the second limiting portion 122 and the fourth limiting portion 142 have opposite inclination directions. In this embodiment, the first latching member 11 is inserted into the first latching cavity 21 from the bottom of the first terminal base 2. The first latching member 11 can extend beyond the first terminal base 2, but cannot retract along the original path, thereby restricting the electrode terminal 1 from moving towards the second terminal base 3. The second latching member 13 is inserted into the second latching cavity 31 from the upper end of the second terminal base 3, thereby restricting the electrode terminal 1 from moving towards the first terminal base 2. The second limiting portion 122 and the fourth limiting portion 142 have opposite directions, so that the first latching member 11 and the second latching member 13 are installed in opposite directions. After installation, the first terminal base 2 and the second terminal base 3 are affected by the second limiting portion 122 and the fourth limiting portion 142 and abut against each other, thereby fixing the electrode terminal 1 in two directions (upper and lower) in the longitudinal direction.

[0077] According to a second aspect of this application, an oxygen sensor is provided, which includes the electrode connection structure 100 described above. This oxygen sensor possesses all the beneficial effects of the electrode connection structure 100 described above, which will not be elaborated further herein.

[0078] In some embodiments, the electrode connection structure 100 is provided with four electrode terminals 1, and the oxygen sensor also includes a chip 200. The chip 200 is clamped and fixed on the first terminal block 2 and the second terminal block 3 by the four electrode terminals 1. The chip 200 contacts the contact members 15 of the four electrode terminals 1, thereby realizing signal transmission.

[0079] According to a third aspect of this application, an engine is provided that includes the oxygen sensor described above. This engine possesses all the beneficial effects of the oxygen sensor described above, which will not be elaborated further herein.

[0080] According to a third aspect of this application, a vehicle is provided that includes the engine described above, and the vehicle has all the beneficial effects of the engine described above, which will not be repeated here.

[0081] The vehicle may be a gasoline-powered vehicle, a plug-in hybrid electric vehicle, or a new energy vehicle, etc., and this application does not make any specific restrictions.

[0082] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0083] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0084] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0085] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. An electrode connection structure, characterized in that, include: At least one electrode terminal; as well as, Terminal block, including a first terminal block and a second terminal block that are separately configured; The electrode terminals are fixedly connected to the first terminal block and the second terminal block, respectively.

2. The electrode connection structure according to claim 1, characterized in that, The first terminal block and the second terminal block are arranged along the axial direction of the terminal block; One end of the electrode terminal is fixedly connected to the first terminal block, and the other end of the electrode terminal is fixedly connected to the second terminal block.

3. The electrode connection structure according to claim 2, characterized in that, The first terminal block is provided with a first snap-fit ​​cavity; The electrode terminal includes a first snap-fit ​​component, which snaps into the first snap-fit ​​cavity.

4. The electrode connection structure according to claim 3, characterized in that, The cavity wall of the first snap-fit ​​cavity is provided with a first limiting groove; The first snap-fit ​​component includes a first limiting piece, which snaps into the first limiting groove.

5. The electrode connection structure according to claim 4, characterized in that, The first limiting piece includes a first limiting part and a second limiting part that are connected to each other. The second limiting part is inclined relative to the first limiting part and is engaged in the first limiting groove.

6. The electrode connection structure according to claim 5, characterized in that, The second limiting part is an elastic structure.

7. The electrode connection structure according to claim 5, characterized in that, The second limiting part is connected to one end of the first limiting part near the second terminal block, and is inclined relative to the first limiting part toward the axis away from the first snap-fit ​​cavity.

8. The electrode connection structure according to claim 5, characterized in that, One end of the first limiting groove passes through the end of the first terminal block away from the second terminal block, and the end wall of the other end of the first limiting groove abuts against the second limiting part.

9. The electrode connection structure according to claim 5, characterized in that, The first limiting part abuts against the cavity wall of the first snap-fit ​​cavity to restrict the first snap-fit ​​member from rotating around the axis of the first snap-fit ​​cavity.

10. The electrode connection structure according to claim 3, characterized in that, The electrode terminal further includes a first steering barrier piece, which is disposed on the first snap-fit ​​member and abuts against the cavity wall of the first snap-fit ​​cavity, for limiting the rotation of the first snap-fit ​​member around the axis of the first snap-fit ​​cavity.

11. The electrode connection structure according to claim 5, characterized in that, The second terminal block is provided with a second snap-fit ​​cavity; The electrode terminal further includes a second snap-fit ​​member, which is disposed at one end of the first snap-fit ​​member near the second terminal block, and the second snap-fit ​​member snaps into the second snap-fit ​​cavity.

12. The electrode connection structure according to claim 11, characterized in that, The cavity wall of the second snap-fit ​​cavity is provided with a second limiting groove; The second snap-fit ​​component includes a second limiting piece, which snaps into the second limiting groove.

13. The electrode connection structure according to claim 12, characterized in that, The second limiting piece includes a third limiting part and a fourth limiting part that are connected to each other. The fourth limiting part is inclined relative to the third limiting part and is engaged in the second limiting groove.

14. The electrode connection structure according to claim 13, characterized in that, The fourth limiting part is an elastic structure.

15. The electrode connection structure according to claim 13, characterized in that, The fourth limiting part is connected to the end of the third limiting part near the first terminal block, and is inclined relative to the third limiting part toward the axis away from the second snap-fit ​​cavity.

16. The electrode connection structure according to claim 15, characterized in that, One end of the second limiting groove passes through the end of the second terminal block away from the first terminal block, and the end wall of the other end of the second limiting groove abuts against the fourth limiting part.

17. The electrode connection structure according to claim 16, characterized in that, The third limiting part abuts against the cavity wall of the second snap-fit ​​cavity to restrict the second snap-fit ​​member from rotating around the axis of the second snap-fit ​​cavity.

18. The electrode connection structure according to claim 11, characterized in that, The electrode terminal further includes a second steering barrier piece, which abuts against the cavity wall of the second snap-fit ​​cavity to restrict the second snap-fit ​​member from rotating around the axis of the first snap-fit ​​cavity.

19. The electrode connection structure according to claim 13, characterized in that, The second limiting part and the fourth limiting part have opposite inclination directions.

20. The electrode connection structure according to claim 3, characterized in that, The electrode terminal also includes a contact element connected to one end of the first snap-fit ​​element, the contact element being used to abut against the chip to mount the chip.

21. The electrode connection structure according to claim 1, characterized in that, The first terminal block and the second terminal block are snap-fitted together.

22. An oxygen sensor, characterized in that, Includes the electrode connection structure and chip as described in any one of claims 1-21, wherein the chip is in contact with the electrode terminals.

23. An engine, characterized in that, Including the oxygen sensor as described in claim 22.

24. A vehicle, characterized in that, Including the engine as described in claim 23.

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