Nitrogen-oxygen sensor chip fixing structure
By using the elastic deformation structure of the first and second frames, combined with the design of the spring and the pressure plate, the nitrogen and oxygen sensor chip is dually fixed, which solves the problem of unstable fixing in the prior art and improves the stability and service life of the nitrogen and oxygen sensor chip.
Patent Information
- Application Number
- CN202423296828.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2025-12-26
- Estimated Expiration
- 2034-12-31
AI Technical Summary
The existing fixing structure for nitrogen and oxygen sensor chips is unstable in harsh environments and cannot effectively fix the nitrogen and oxygen sensor chips, resulting in insecure fixing.
The first and second frames are elastically deformable, and combined with the design of spring and pressure plate, the nitrogen and oxygen sensor chip is double-fixed by the elastic force of the elastic component, which enhances the fixing effect.
This technology enables stable fixation of the nitrogen and oxygen sensor chip in harsh environments, reduces the occurrence of fixation instability, and improves the service life of the nitrogen and oxygen sensor chip.
Smart Images
Figure CN223727794U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The application relates to the technical field of nitrogen-oxygen sensors, in particular to a nitrogen-oxygen sensor chip fixing structure. BACKGROUND
[0002] With the deepening of the research on gas concentration, gas sensors are widely used in environmental monitoring, energy saving and emission reduction, industrial process control, disease detection, public safety and other fields. In particular, the exhaust gas of automobiles has become the main source of atmospheric NOx pollutants. Therefore, it is particularly important to detect and process the NOx emissions in the exhaust gas in real time, and the nitrogen-oxygen sensor is one of the core components in the detection system. At present, when the nitrogen-oxygen sensor is packaged, a fixing structure is used to fix the nitrogen-oxygen sensor chip in the shell for detecting the gas entering the shell. The fixing structure usually includes a buckle and two mutually symmetrical ceramic pressing blocks. There is a gap between the two ceramic pressing blocks. The nitrogen-oxygen sensor chip is inserted into the gap, and then the nitrogen-oxygen sensor chip is fixed in the gap by the buckle, thereby completing the fixation of the nitrogen-oxygen sensor chip. NO X Most of them are NO, and a small amount of them are NO2. NO slowly oxidizes to NO2 in the presence of oxygen, and combines with water vapor in the exhaust gas to form nitric acid, which has strong corrosive properties to metals. The NO X The temperature of the exhaust gas is high, and the working environment of the nitrogen-oxygen sensor is harsh. Only the buckle is used to fix the nitrogen-oxygen sensor chip, and the fixing structure becomes unstable with the increase of the use time. SUMMARY
[0003] The purpose of the application is to provide a nitrogen-oxygen sensor chip fixing structure which can stably fix the nitrogen-oxygen sensor chip.
[0004] The nitrogen-oxygen sensor chip fixing structure provided by the application adopts the following technical scheme:
[0005] A nitrogen-oxygen sensor chip fixing structure comprises:
[0006] A first frame and a second frame, the first frame is sleeved on the second frame, and the second frame can be elastically deformed;
[0007] A first pressing block and a second pressing block, both of which are arranged in the second frame and symmetrically arranged with each other, and an installation gap is arranged between the first pressing block and the second pressing block;
[0008] At least two elastic sheets are arranged, and the at least two elastic sheets are distributed on both sides of the second frame and located between the second frame and the first frame. The two ends of the elastic sheet are respectively abutted with the first frame and the second frame.
[0009] Optionally, the elastic sheet comprises a mounting portion and an elastic portion, the mounting portion abuts against the second frame body, and the elastic portion is fixed on the mounting portion and has an included angle with the mounting portion.
[0010] Optionally, the fixing plate is further provided, one end of the fixing plate is fixed in the second frame body, the other end of the fixing plate is bent to form a pressing portion, the mounting portion is inserted between the fixing plate and the second frame body and is pressed by the pressing portion and the second frame body.
[0011] Optionally, a limiting groove is formed on the mounting portion, and the bent portion of the fixing plate can be inserted into the limiting groove.
[0012] Optionally, a notch is formed in the side wall of the second frame body, and the notch penetrates through the side wall of the second frame body to form a U-shaped second frame body.
[0013] Optionally, an arc surface is arranged at one end of the elastic portion close to the first frame body, and the arc surface abuts against the first frame body.
[0014] Optionally, a sliding groove is formed in the inner side wall of the first frame body, and a sliding rib is fixed on the side wall of the second frame body, and the sliding rib is slidably arranged in the sliding groove.
[0015] Optionally, two elastic members are fixedly arranged in each sliding groove, and the two elastic members are arranged at two ends of the sliding rib and are fixedly connected with the sliding rib.
[0016] According to the elastic deformation of the first frame body, the first pressing sheet and the second pressing sheet press the nitrogen-oxygen sensor chip, so that the nitrogen-oxygen sensor chip is fixed for the first time, the elastic force generated by the two elastic sheets acts on the second outer frame and is conducted to the first pressing sheet and the second pressing sheet through the second outer frame, so that the nitrogen-oxygen sensor chip is fixed for the second time, and the fixing effect of the nitrogen-oxygen sensor chip is further improved, so that the instability of the nitrogen-oxygen sensor chip is reduced. BRIEF DESCRIPTION OF DRAWINGS
[0017] Figure 1 is a schematic view of the overall structure of a nitrogen-oxygen sensor chip fixing structure according to Embodiment 1 of the present application.
[0018] Figure 2 is a schematic view of the structure after the first frame body is hidden in Embodiment 1 of the present application.
[0019] Figure 3 is a schematic view of the overall structure of a nitrogen-oxygen sensor chip fixing structure according to Embodiment 2 of the present application.
[0020] In the figure, 1, the first frame; 11, the sliding groove; 2, the second frame; 21, the notch; 22, the limiting groove; 23, the sliding rib; 3, the first pressing piece; 4, the second pressing piece; 5, the elastic piece; 51, the mounting portion; 52, the elastic portion; 521, the arc surface; 6, the mounting gap; 7, the fixed plate; 71, the pressing portion; 8, the elastic member; 9, the nitrogen-oxygen sensor chip. DETAILED DESCRIPTION
[0021] The following description will be made in conjunction with the accompanying drawings Figure 1 - the accompanying drawings Figure 3 Further detailed description will be made to the present application.
[0022] Example 1
[0023] A nitrogen-oxygen sensor chip fixing structure, referring to Figure 1 and Figure 2 , comprising a first frame 1, a second frame 2, a first pressing piece 3, a second pressing piece 4 and an elastic piece 5, the second frame 2 can be elastically deformed; the first frame 1 is sleeved on the second frame 2 and coaxially arranged with the second frame 2, there is a certain space between the first frame 1 and the second frame 2, the elastic piece 5 is provided at least two, the at least two elastic pieces 5 are distributed on both sides of the second frame 2 and between the second frame 2 and the first frame 1, in this embodiment, two elastic pieces 5 are taken as an example, one of the above-mentioned elastic pieces 5 is arranged at the upper end of the second frame 2 and the other is arranged at the lower end of the second frame 2, one end of the elastic piece 5 abuts against the outer wall of the second frame 2, and the other end of the elastic piece 5 abuts against the inner wall of the first frame 1.
[0024] The first pressing piece 3 and the second pressing piece 4 are both arranged in the second frame 2 and fixedly connected with the second frame 2, and there is a mounting gap 6 between the first pressing piece 3 and the second pressing piece 4, the positions of the two elastic pieces 5 are respectively corresponding to the positions of the first pressing piece 3 and the second pressing piece 4.
[0025] When fixing the nitrogen-oxygen sensor chip 9, the nitrogen-oxygen sensor chip 9 is inserted into the mounting gap 6, the size of the mounting gap 6 is slightly smaller than the width of the nitrogen-oxygen sensor chip 9, so the nitrogen-oxygen sensor chip 9 will move the first pressing piece 3 and the second pressing piece 4 away from each other, thereby causing the second frame 2 and the two elastic pieces 5 to elastically deform, when the nitrogen-oxygen sensor chip 9 is inserted into the corresponding position, the movement stops, at this time, the elastic force generated by the second frame 2 acts on the first pressing piece 3 and the second pressing piece 4, so that the first pressing piece 3 and the second pressing piece 4 press the nitrogen-oxygen sensor chip 9, thereby performing the first re-fixing of the nitrogen-oxygen sensor chip 9, and then the elastic force generated by the two elastic pieces 5 acts on the second outer frame and is conducted to the first pressing piece 3 and the second pressing piece 4 through the second outer frame, thereby performing the second re-fixing of the nitrogen-oxygen sensor chip 9, further increasing the fixing effect of the nitrogen-oxygen sensor chip 9.
[0026] Specifically, the second frame 2 side wall is provided with a notch 21, the notch 21 penetrates the second frame 2 side wall to make the second frame 2 arranged in a U shape. In the embodiment, the second frame 2 can be made of martensitic stainless steel or austenitic stainless steel or ferritic stainless steel. When the first pressing piece 3 and the second pressing piece 4 move away from each other, the two ends of the second frame 2 located in the notch 21 will move away from each other, thereby generating elastic deformation. In other embodiments, the second frame 2 can not be provided with a notch 21. At this time, the second frame 2 is made of rubber or other materials that can generate elastic deformation.
[0027] The elastic sheet 5 includes a mounting portion 51 and an elastic portion 52. The mounting portion 51 abuts against the second frame 2. One end of the elastic portion 52 is fixedly connected with the mounting portion 51, and the other end abuts against the inner wall of the first frame 1. The elastic portion 52 and the mounting portion 51 have an included angle therebetween. Specifically, the mounting portion 51 and the elastic portion 52 are integrally formed and can be made of martensitic stainless steel or austenitic stainless steel or ferritic stainless steel. When the elastic portion 52 is subjected to pressure, it deflects towards the mounting portion 51, thereby generating elastic deformation and generating elastic force. The elastic force acts on the inner wall of the first frame 1. Since the first frame 1 is fixed, the mounting portion 51 is subjected to pressure towards the second frame 2, thereby pressing the first pressing piece 3 and the second pressing piece 4.
[0028] In the embodiment, each elastic sheet 5 is composed of two elastic portions 52 and one mounting portion 51. The two elastic portions 52 are symmetrically arranged relative to each other and are fixedly connected at the two ends of the mounting portion 51. The two elastic portions 52 are arranged to be inclined towards each other. The mounting portion 51 is subjected to elastic force transmitted by the two elastic portions 52 at the two ends, thereby making the force acting on the mounting portion 51 more balanced, reducing the deflection of the mounting portion 51, and making the mounting portion 51 more closely attached to the second frame 2.
[0029] Further, the elastic portion 52 is provided with an arc surface 521 at the end close to the first frame 1. The arc surface 521 abuts against the first frame 1. The provision of the arc surface 521 reduces the pressure at the abutting position of the elastic portion 52 and the first frame 1, thereby reducing the wear between the elastic portion 52 and the first frame 1.
[0030] The second frame 2 is fixedly connected with a fixed plate 7. The end of the fixed plate 7 away from the second frame 2 is bent to form a pressing portion 71. The mounting portion 51 is inserted between the pressing portion 71 and the second frame 2 and is pressed by the pressing portion 71 and the second frame 2. At least one fixed plate 7 is arranged at each end of the mounting portion 51, so that at least two pressing portions 71 fix the two ends of the mounting portion 51, thereby reducing the movement of the elastic sheet 5 between the first frame 1 and the second frame 2 and making the elastic sheet 5 more stable during operation.
[0031] Further, the second frame 2 side wall is provided with a limiting groove 22, and the bending part of the fixing plate 7 can be inserted into the limiting groove 22. Specifically, each fixing plate 7 is provided with one limiting groove 22, and the bending part of each fixing plate 7 is inserted into the corresponding limiting groove 22, so that the movement of the elastic sheet 5 is further limited through the cooperation of the limiting groove 22 and the fixing plate 7, the stability of the elastic sheet 5 is further ensured, and the occurrence of position deviation of the elastic sheet 5 is further reduced.
[0032] Embodiment 2:
[0033] The embodiment 2 is substantially the same as the structure of the embodiment 1, and the difference lies in that the elastic member 8 is additionally arranged.
[0034] With reference to Figure 3 The second frame 2 side wall is fixedly connected with a sliding rib 23, and the first frame 1 inner wall is provided with a sliding groove 11, and the sliding rib 23 is slidably arranged in the sliding groove 11. Through the cooperation of the sliding groove 11 and the sliding rib 23, the transverse movement of the second frame 2 and the first frame 1 is limited, so that the transverse movement of the second frame 2 is reduced during the process of inserting the nitrogen oxygen sensor chip 9 into the installation gap 6, and the stability of the second frame 2 is ensured.
[0035] Further, each sliding groove 11 is provided with an elastic member 8, and the elastic member 8 is a spring. One end of each elastic member 8 is fixed on the sliding rib 23, and the other end of the elastic member 8 is fixed on the inner wall of the sliding groove 11. During the installation of the nitrogen oxygen sensor chip 9, the nitrogen oxygen sensor chip 9 may drive the first pressing sheet 3 to move upward, which drives the second frame 2 to move upward, so that the elastic sheet 5 located below is separated from the first frame 1. Through the arrangement of the elastic member 8, the elastic member 8 drives the sliding rib 23 to reset, and cooperates with the elastic sheet 5 which is elastically deformed to reset the second frame 2. Through the arrangement of the elastic member 8, the second frame 2 is reset, and the occurrence of position translation of the second frame 2 is reduced.
[0036] The embodiments of the specific embodiment are the preferred embodiments of the application, and are not limited to the protection scope of the application. The same parts are indicated by the same reference numerals. Therefore, equivalent changes made according to the structure, shape and principle of the application should be covered by the protection scope of the application.
Claims
1. A nitrogen and oxygen sensor chip fixing structure, characterized in that, The utility model relates to a kind of elastic frame, including: First frame (1) and second frame (2), the first frame (1) is set on the second frame (2), the second frame (2) can be elastically deformed; First pressing piece (3) and second pressing piece (4) are symmetrically arranged in the second frame (2), and the first pressing piece (3) and the second pressing piece (4) are provided with mounting gap (6) between them; At least two elastic sheets (5) are provided, and the at least two elastic sheets (5) are distributed on both sides of the second frame (2) and between the second frame (2) and the first frame (1), and the two ends of the elastic sheet (5) are respectively abutted with the first frame (1) and the second frame (2).
2. The nitric oxide sensor chip fixation structure according to claim 1, wherein The elastic sheet (5) includes a mounting portion (51) and an elastic portion (52), the mounting portion (51) is abutted on the second frame (2), and the elastic portion (52) is fixed on the mounting portion (51) and has an included angle between the mounting portion (51).
3. The nitric oxide sensor chip fixation structure according to claim 2, wherein It also includes a fixed plate (7), one end of the fixed plate (7) is fixed in the second frame (2), the other end is bent to form a pressing portion (71), the mounting portion (51) is inserted between the fixed plate (7) and the second frame (2) and is pressed tightly by the pressing portion (71) and the second frame (2).
4. The nitric oxide sensor chip fixation structure according to claim 3, wherein A limiting groove (22) is formed on the mounting portion (51), and the bending part of the fixed plate (7) can be inserted into the limiting groove (22).
5. The nitric oxide sensor chip fixation structure according to claim 1, wherein A slot (21) is formed in the side wall of the second frame (2), and the slot (21) penetrates the side wall of the second frame (2) to form a U-shaped second frame (2).
6. The nitric oxide sensor chip fixation structure according to claim 2, wherein An arc surface (521) is arranged at one end of the elastic portion (52) close to the first frame (1), and the arc surface (521) is abutted with the first frame (1).
7. The nitric oxide sensor chip fixation structure according to claim 1, wherein A sliding groove (11) is formed in the inner side wall of the first frame (1), and a sliding rib (23) is fixed on the side wall of the second frame (2), and the sliding rib (23) is slidably arranged in the sliding groove (11).
8. The nitric oxide sensor chip fixation structure according to claim 7, wherein An elastic member (8) is fixedly arranged in each sliding groove (11), and the elastic member (8) is fixedly connected with the sliding rib (23).