A high temperature exhaust gas temperature sensor with a protective shell

Abstract

This utility model relates to a high-temperature resistant exhaust temperature sensor, belonging to the field of sensor technology. It includes a junction box for housing components; a thermistor disposed within the junction box for sensing temperature changes; a connecting plate disposed within the junction box for connecting the thermistor; pins disposed on the thermistor; and a socket provided on the connecting plate through which the pins are positioned within the connecting plate for fixing the thermistor. A fastening assembly disposed on the connecting plate for clamping the pins. The fastening assembly includes an abutment post movably disposed within the connecting plate for receiving the force of the pins being inserted into the socket; a transmission post movably disposed within the connecting plate, with its input end connected to the abutment post; and a clamping post movably disposed within the connecting plate and connected to the output end of the transmission post. The transmission post transmits the force received by the abutment post to the clamping post, causing the clamping post to clamp the pins. This utility model, through the fastening assembly, clamps the pins, facilitating resistor replacement.

Description

Technical Field

[0001] This application relates to the field of temperature sensor technology, and in particular to a high-temperature resistant exhaust temperature sensor with a high-temperature housing. Background Technology

[0002] A temperature sensor is a sensor that can sense temperature and convert it into a usable output signal. It is a device that can convert the physical quantity of temperature into an electrical signal or other measurable signal. At the same time, the housing of the temperature sensor needs to be heat-resistant. Many temperature sensors need to work in high-temperature environments. A heat-resistant housing can protect the sensitive elements inside the sensor, allowing it to work normally in high-temperature environments.

[0003] Currently, a Chinese utility model patent application with a publication date of May 13, 2025, and publication number CN 222866083U, discloses a high thermal conductivity, high temperature resistance, and high pressure resistance thermal runaway temperature sensor. It includes an insulating high-temperature resistant encapsulation sleeve, a temperature-sensing resistor, a wire electrically connected to an external circuit, and a high thermal conductivity housing. One end of the wire is soldered to the lead of the temperature-sensing resistor. The temperature-sensing resistor and the solder joint between the temperature-sensing resistor and the wire are encapsulated within the insulating high-temperature resistant encapsulation sleeve, forming an insulating high-temperature resistant encapsulation head for the temperature-sensing resistor. The entire insulating high-temperature resistant encapsulation head extends into the high thermal conductivity housing, which is filled with high-temperature resistant potting compound. The other end of the wire extends out of the housing. The insulating high-temperature resistant encapsulation sleeve uses high-temperature resistant heat shrink tubing. The high-temperature resistant heat shrink tubing reduces the curing time of ordinary encapsulation materials, improving production efficiency. The high-temperature resistant heat shrink tubing not only gives the temperature sensor product the advantage of high temperature resistance, but also has superior physical insulation and pressure resistance characteristics compared to ordinary encapsulation materials, improving the insulation and pressure resistance of the temperature sensor product.

[0004] The high thermal conductivity, high temperature resistance, and high pressure resistance thermal runaway temperature sensor in related technologies suffers from changes in resistance value of the thermistor due to material aging and other reasons after long-term use, affecting measurement accuracy and making it unable to respond quickly to temperature changes.

[0005] Therefore, it is necessary to provide a high-temperature resistant exhaust temperature sensor to solve the above problems. Utility Model Content

[0006] This application provides a high-temperature resistant exhaust temperature sensor to improve the technical problem in related technologies where the resistance of the sensor changes due to material aging and other reasons after long-term use, affecting the measurement accuracy and making it unable to respond quickly to temperature changes.

[0007] This application provides a high-temperature resistant exhaust temperature sensor, including:

[0008] Junction boxes are used to hold components;

[0009] A thermistor, located inside the junction box, is used to sense temperature changes;

[0010] A connecting plate, located inside the junction box, is used to connect a thermistor;

[0011] Pins are disposed on the thermistor. The connecting plate has a socket, and the pins are movably disposed in the connecting plate through the socket for fixing the thermistor.

[0012] A fastening assembly, provided on the connecting plate, is used to clamp the pins;

[0013] The fastening assembly includes...

[0014] An abutment post, movably disposed within the connecting plate, is used to receive the force of the pins in the insertion socket;

[0015] A transmission column is movably disposed within the connecting plate, and the input end of the transmission column is connected to the abutment column;

[0016] The clamping column is movably disposed within the connecting plate and connected to the output end of the transmission column;

[0017] The transmission column is used to transmit the force received by the abutment column to the clamping column, so that the clamping column clamps the pin;

[0018] The clamping post is also equipped with barbs to prevent the pin from retracting.

[0019] The technical solutions described above in this application embodiment have at least the following technical effects: When a user replaces a thermistor, by inserting the pin into the socket and the pin abutting against the abutting post, the abutting post transmits the force received in the pin to the transmission post, and the transmission post transmits the force received in the abutting post to the clamping post, so that the clamping post clamps the pin.

[0020] The high-temperature resistant exhaust temperature sensor provided in this application embodiment can securely clamp the pins in the socket through the fastening assembly, the synergistic action of the abutment post, the transmission post and the clamping post. This ensures stable contact between the pins and the socket, reduces loosening or poor contact caused by vibration or external force, withstands long-term use and multiple insertions and removals, and facilitates resistor replacement.

[0021] In some embodiments, a first abutting ring is provided on the abutting post, and a first abutting spring is sleeved on the abutting post. One end of the first abutting spring abuts against the first abutting spring, and the other end of the first abutting spring abuts against the connecting plate, for resetting the abutting post;

[0022] The clamping post is provided with a second abutting ring, and a second abutting spring is sleeved on the clamping post. One end of the second abutting spring abuts against the second abutting ring, and the other end of the second abutting spring abuts against the connecting plate, for resetting the clamping post.

[0023] In some embodiments, the barb includes,

[0024] The barbed plate has a connecting groove on the clamping post, and the barbed plate is mounted on the clamping post through the connecting groove.

[0025] A round shaft passes through the barb plate and is disposed in the connecting groove to drive the barb plate to rotate.

[0026] In some embodiments, the junction box is provided with a protective tube, and the protective tube is filled with magnesium oxide powder for heat conduction.

[0027] In some embodiments, the junction box is provided with an electrical interface for connecting to external lines, and the junction box is provided with an exhaust port for venting gas expansion caused by temperature rise inside.

[0028] In some embodiments, the protective tube is provided with fasteners for fixing it to the temperature measuring element.

[0029] In some embodiments, the junction box, protective tube, and fasteners are all made of stainless steel for high temperature resistance. Attached Figure Description

[0030] Figure 1 A three-dimensional structural diagram of a high-temperature resistant exhaust temperature sensor with a housing provided in this application embodiment. Figure 1 ;

[0031] Figure 2 A three-dimensional structural diagram of a high-temperature resistant exhaust temperature sensor with a housing provided in this application embodiment. Figure 2 ;

[0032] Figure 3 This is a cross-sectional structural diagram of the connecting plate provided in an embodiment of this application;

[0033] Figure 4 A cross-sectional structural diagram of the clamping column provided in an embodiment of this application;

[0034] Figure 5 for Figure 4 Enlarged view of point A in the middle;

[0035] The following are the labeling elements in the figure:

[0036] 1. Junction box; 11. Protective tube; 12. Fastener; 13. Electrical interface; 14. Thermistor; 15. Pin; 16. Connecting plate; 17. Socket; 18. Vent hole; 2. Fastening assembly; 21. Abutment post; 22. Transmission post; 23. Clamping post; 24. First abutment ring; 25. First abutment spring; 26. Second abutment ring; 27. Second abutment spring; 3. Barbed part; 31. Barbed plate; 32. Round shaft; 33. Connecting groove. Detailed Implementation

[0037] Based on this, in order to improve the technical problem that the resistance of sensors in related technologies changes due to material aging and other reasons after long-term use, affecting measurement accuracy and failing to respond quickly to temperature changes, the embodiments of this application provide the following solutions.

[0038] Please refer to the following: Figures 1 to 5 This application provides a high-temperature resistant exhaust temperature sensor with a housing. The high-temperature resistant exhaust temperature sensor includes a junction box 1 for carrying components; a thermistor 14 disposed in the junction box 1 for sensing temperature changes; a connecting plate 16 disposed in the junction box 1 for connecting the thermistor 14; pins 15 disposed on the thermistor 14; the connecting plate 16 has a socket 17, through which the pins 15 are movably disposed within the connecting plate 16 for fixing the thermistor 14; and a fastening assembly 2 disposed on the connecting plate 16 for clamping the pins 15.

[0039] In some embodiments, please refer to the following: Figures 3 to 5The fastening assembly 2 includes: an abutment post 21, movably disposed within the connecting plate 16, for receiving the force of the pin 15 in the insertion hole 17; a transmission post 22, movably disposed within the connecting plate 16, with its input end connected to the abutment post 21; and a clamping post 23, movably disposed within the connecting plate 16 and connected to the output end of the transmission post 22. The transmission post 22 transmits the force received by the abutment post 21 to the clamping post 23, causing the clamping post 23 to clamp the pin 15. The abutment post 21 is provided with a first abutment ring 24, and a first abutment spring 25 is sleeved on the abutment post 21. One end of the first abutment spring 25 abuts against the first abutment spring 25. The other end abuts against the connecting plate 16 to reset the abutting post 21; a second abutting ring 26 is provided on the clamping post 23, and a second abutting spring 27 is sleeved on the clamping post 23. One end of the second abutting spring 27 abuts against the second abutting ring 26, and the other end of the second abutting spring 27 abuts against the connecting plate 16 to reset the clamping post 23. A barb 3 is also provided on the clamping post 23 to prevent the pin 15 from retracting; the barb 3 includes a barb plate 31, a connecting groove 33 is provided on the clamping post 23, and the barb plate 31 is set on the clamping post 23 through the connecting groove 33; a round shaft 32 passes through the barb plate 31 and is set in the connecting groove 33 to drive the barb plate 31 to rotate.

[0040] With this configuration, when the user replaces the thermistor 14, by inserting the pin 15 into the socket 17 and having the pin 15 abut against the abutment post 21, the first abutment ring 24 on the abutment post 21 presses against the first abutment spring 25. At the same time, the abutment post 21 transmits the force received by the pin 15 to the transmission post 22. The transmission post 22 moves upward in the connecting plate 16 and transmits the force received by the abutment post 21 to the clamping post 23. The second abutment ring 26 on the clamping post 23 presses against the second abutment spring 27, so that the clamping post 23 clamps the pin 15. Meanwhile, the barb 3 on the abutment post 21 has a backstop effect. When the pin 15 wants to move backward, the barb plate 31 on the abutment post 21 rotates with the round shaft 32 and abuts against the pin 15, reducing the probability of the pin 15 becoming loose. Thus, when the user inserts the pin 15 of the thermistor 14 into the socket 17, the pin 15 first contacts the abutment post 21, applying a downward force to the abutment post 21. The first abutment ring 24 on the abutment post 21 moves downward, pressing against the first abutment spring 25, causing the first abutment spring 25 to undergo elastic deformation and store energy. Simultaneously, the abutment post 21 transmits the force applied by the pin 15 to the transmission post 22. The transmission post 22 moves upward in the connecting plate 16, transmitting the force to the clamping post 23. The second abutment ring 26 on the clamping post 23 presses against the second abutment spring 27, causing the second abutment spring 27 to also undergo elastic deformation and store energy. As the second abutment spring 27 is compressed, the clamping post 23 gradually approaches the pin 15, ultimately clamping the pin 15 and firmly fixing it in the socket 17. The clamping post 23 then clamps the pin 15. 5. Clamping is performed using the elastic force of the second abutment spring 27 to ensure that the pin 15 is firmly installed in the socket 17 and will not easily loosen. Even if the device is subjected to certain vibrations or external forces during operation, the pin 15 can maintain a stable connection, ensuring the reliable electrical connection of the thermistor 14 and avoiding problems such as poor contact and signal transmission interruption caused by the loosening of the pin 15. This structure makes the insertion and clamping process of the pin 15 simple and easy to operate. The user only needs to insert the pin 15 into the socket 17, and the device will automatically complete the clamping action without additional tools or complicated operating steps, which greatly improves the efficiency of thermistor 14 replacement and saves time and labor costs. The barbs 3 on the abutment post 21 can effectively prevent the pin 15 from loosening when the pin 15 is subjected to backward force. This anti-backward design increases the stability of the pin 15 installation and further enhances the reliability of the device.

[0041] In some embodiments, please refer to the following: Figures 1 to 2The junction box 1 is equipped with a protective tube 11, which contains magnesium oxide powder for heat conduction. The junction box 1 has an electrical interface for connecting to external circuits. The junction box 1 also has an exhaust port 18 to allow gas expansion caused by temperature rise. The protective tube 11 is equipped with a fastener 12 for fixing to the temperature measuring device. The junction box 1, the protective tube 11, and the fastener 12 are all made of stainless steel for high temperature resistance.

[0042] With this configuration, the protective tube 11 is filled with magnesium oxide powder. Magnesium oxide powder has excellent thermal conductivity, which can quickly conduct the heat generated by the thermistor 14 to the outside of the protective tube 11, ensuring the stable operating temperature of the thermistor 14. The good thermal conductivity allows the thermistor 14 to more accurately reflect the actual temperature of the measured object, reducing measurement deviations caused by heat accumulation, thereby improving the accuracy of the entire temperature measurement system. The junction box 1 is equipped with an electrical interface for connecting to external circuits. This design allows the junction box 1 to be easily connected to external circuits, ensuring the stability and reliability of signal transmission. Good electrical connections reduce electrical faults caused by poor contact, short circuits, etc., improving the stability and reliability of the system. The junction box 1 is equipped with an exhaust vent. Hole 18 is used to expel gas expansion caused by internal temperature rise. When the internal temperature of junction box 1 rises, gas expansion may lead to an increase in internal pressure. Exhaust hole 18 can timely discharge excess gas to prevent junction box 1 from cracking or deforming due to excessive internal pressure, thereby ensuring the safe operation of the equipment. Fastener 12 is provided on the protective tube 11 for fixing to the temperature measuring component. Fastener 12 can ensure a firm connection between the protective tube 11 and the temperature measuring component, preventing the protective tube 11 from loosening or falling off due to vibration or external force. Junction box 1, protective tube 11 and fastener 12 are all made of stainless steel. Stainless steel has good high temperature resistance and can maintain its physical and chemical properties stable in high temperature environments, and will not deform, corrode or be damaged due to high temperature.

[0043] The implementation principle of a high-temperature resistant exhaust temperature sensor according to an embodiment of this application is as follows: When the user replaces the thermistor 14, by inserting the pin 15 into the socket 17, the pin 15 abuts against the abutment post 21. At the same time, the abutment post 21 transmits the force received by the pin 15 to the transmission post 22. The transmission post 22 moves upward in the connecting plate 16 and transmits the force received by the abutment post 21 to the clamping post 23. The second abutment ring 26 on the clamping post 23 abuts against the second abutment spring 27, so that the clamping post 23 clamps the pin 15. At the same time, the barb 3 on the abutment post 21 has a backstop effect. When the pin 15 wants to move backward, the barb 31 on the abutment post 21 rotates with the shaft 32 and abuts against the pin 15, reducing the probability of the pin 15 becoming loose.

[0044] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A high temperature exhaust gas temperature sensor for an outer shell, characterized by, include: Junction box (1), used to carry parts; A thermistor (14) is disposed in the junction box for sensing temperature changes; A connecting plate (16) is disposed inside the junction box (1) for connecting a thermistor (14). Pins (15) are disposed on the thermistor (14), and a socket (17) is provided on the connecting plate (16). Pins (15) are movably disposed in the connecting plate (16) through the socket (17) for fixing the thermistor (14). Fastening assembly (2), provided on the connecting plate (16), is used to clamp the pin (15); The fastening assembly (2) includes, The abutment post (21) is movably disposed within the connecting plate (16) for receiving the force of the pin (15) in the insertion socket (17); The transmission column (22) is movably disposed within the connecting plate (16), and the input end of the transmission column (22) is connected to the abutment column (21). The clamping column (23) is movably disposed within the connecting plate (16) and connected to the output end of the transmission column (22); The transmission column (22) is used to transmit the force received by the abutment column (21) to the clamping column (23) so that the clamping column (23) clamps the pin (15); The clamping post (23) is also provided with barbs (3) for preventing the pin (15) from retracting.

2. The high-temperature resistant exhaust temperature sensor with a housing according to claim 1, characterized in that: The abutting post (21) is provided with a first abutting ring (24), and a first abutting spring (25) is sleeved on the abutting post (21). One end of the first abutting spring (25) abuts against the first abutting spring (25), and the other end of the first abutting spring (25) abuts against the connecting plate (16) for resetting the abutting post (21). The clamping post (23) is provided with a second abutting ring (26), and a second abutting spring (27) is sleeved on the clamping post (23). One end of the second abutting spring (27) abuts against the second abutting ring (26), and the other end of the second abutting spring (27) abuts against the connecting plate (16) for resetting the clamping post (23).

3. The high-temperature resistant exhaust temperature sensor with a housing according to claim 2, characterized in that: The barbed component (3) includes, The barbed plate (31) is provided with a connecting groove (33) on the clamping post (23), and the barbed plate (31) is set on the clamping post (23) through the connecting groove (33); A round shaft (32) passes through the barb plate (31) and is disposed in the connecting groove (33) to drive the barb plate (31) to rotate.

4. A high-temperature resistant exhaust temperature sensor with a housing according to claim 3, characterized in that: The junction box (1) is provided with a protective tube (11), and the protective tube (11) is filled with magnesium oxide powder for heat conduction.

5. A high-temperature resistant exhaust temperature sensor with a housing according to claim 4, characterized in that: The junction box (1) is provided with an electrical interface for connecting to external lines, and the junction box (1) is provided with an exhaust hole (18) for venting the gas expansion caused by the increase in temperature inside.

6. A high-temperature resistant exhaust temperature sensor with a housing according to claim 5, characterized in that: The protective tube (11) is provided with fasteners (12) for fixing to the temperature measuring component.

7. A high-temperature resistant exhaust temperature sensor with a housing according to claim 6, characterized in that: The junction box (1), protective tube (11) and fastener (12) are all made of stainless steel and are designed to withstand high temperatures.

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