A combined NTC intelligent sensor

Abstract

The application discloses a combined NTC intelligent sensor, and relates to the technical field of sensors.The combined NTC intelligent sensor comprises a sensor body, a probe head, a rotating cylinder and a transmission sleeve.The sensor body is provided with a first shaft hole and stepped first and second shaft bodies.The rotating cylinder is sleeved on the first shaft body, the probe head is sleeved on the second shaft body with the lower end extending out, and the transmission sleeve is movably sleeved between the rotating cylinder and the probe head.The rotating cylinder and the transmission sleeve, and the transmission sleeve and the probe head are respectively connected through a clamping pin and a spiral groove / vertical groove.The lower end of the sensor body is provided with a sliding hole and an elastic expansion block, and the transmission sleeve can be axially moved to extrude the elastic expansion block radially.The sensor body is provided with a fan-shaped adjusting window, and the adjusting arm of the rotating cylinder is locked through an elastic clamping pin and an adjusting clamping groove.The combined NTC intelligent sensor has the advantages of stable installation, convenient adjustment and wide application range.

Description

Technical Field

[0001] This invention relates to the field of sensor technology, and in particular to a combined NTC smart sensor. Background Technology

[0002] NTC smart sensors are widely used in temperature measurement, environmental monitoring, and other fields due to their high sensitivity and rapid response. However, existing combined NTC smart sensors still have many shortcomings in practical applications: During installation, the dimensional tolerance of the mounting holes can easily lead to deviations in sensor positioning accuracy, and fluctuations in assembly force can further affect installation stability, making it difficult to guarantee the accuracy of measurement data. At the same time, the detection depth of most sensors is fixed and cannot be flexibly adjusted according to the needs of different measurement scenarios. Summary of the Invention

[0003] The purpose of this invention is to overcome the above-mentioned shortcomings and provide a combined NTC smart sensor.

[0004] To achieve the above objectives, the specific solution of the present invention is as follows: A combined NTC smart sensor includes a sensor body and a probe; the sensor body has a first shaft hole; a first shaft extends into the first shaft hole; a second shaft extends from the first shaft and has a cross-sectional area smaller than that of the first shaft; a rotating cylinder is rotatably fitted onto the outer peripheral wall of the first shaft; the probe is fitted onto the outer peripheral wall of the second shaft; the lower end of the probe protrudes downward from the first shaft hole; a transmission sleeve is movably fitted between the inner peripheral wall of the rotating cylinder and the outer peripheral wall of the probe; the lower end of the transmission sleeve protrudes downward from the lower end of the rotating cylinder. The inner circumferential wall of the rotating cylinder is connected to the outer circumferential wall of the transmission sleeve, enabling the rotating cylinder to drive the transmission sleeve to achieve axial movement and rotational motion; the inner circumferential wall of the transmission sleeve is connected to the outer circumferential wall of the probe head, enabling the transmission sleeve to drive the probe head to move axially when it rotates. The lower end of the sensor body is provided with multiple radially arranged sliding holes along the circumference; each sliding hole is provided with an elastic expansion block, so that when the transmission sleeve moves axially, the elastic expansion block can be squeezed to extend outward radially.

[0005] In some embodiments of the present invention, a fan-shaped adjustment window is provided through the upper end of the sensor body; an adjustment arm extending into the adjustment window is provided at the upper end of the outer peripheral wall of the rotating cylinder; adjustment slots are evenly distributed in the fan-shaped adjustment window; the adjustment arm is provided with an elastic locking pin; the elastic locking pin cooperates with the adjustment slot to lock the rotating cylinder in an unlockable manner.

[0006] In some embodiments of the present invention, the top and bottom surfaces of the fan-shaped adjustment window are evenly provided with adjustment slots; the top and bottom surfaces of the adjustment arm are provided with elastic locking pins.

[0007] In some embodiments of the present invention, the number of the fan-shaped adjustment windows is two, and the two fan-shaped adjustment windows are symmetrically arranged; each fan-shaped adjustment window has an adjustment slot evenly distributed inside; The number of the adjusting arms is set to two, and the two adjusting arms are symmetrically arranged; the two adjusting arms extend into the corresponding sector-shaped adjusting window one by one; each adjusting arm is provided with an elastic locking pin.

[0008] In some embodiments of the present invention, the lower end of the transmission sleeve is provided with a pressing head; the outer peripheral wall of the pressing head is provided with a first locking pin; the inner peripheral wall of the first shaft hole is provided with a first vertical groove and a circular groove communicating with the lower end of the first vertical groove; when the first locking pin is engaged with the first vertical groove, the transmission sleeve can move axially; when the first locking pin is engaged with the circular groove, the transmission sleeve can rotate.

[0009] In some embodiments of the present invention, the inner side of the elastic expansion block is provided with a driving inclined surface for contacting and engaging with the extrusion head.

[0010] In some embodiments of the present invention, the inner peripheral wall of the rotating cylinder is provided with a second locking pin; the outer peripheral wall of the transmission sleeve is provided with a first spiral groove; and the second locking pin is movably embedded in the first spiral groove.

[0011] In some embodiments of the present invention, the inner peripheral wall of the transmission sleeve is provided with a third retaining pin; the outer peripheral wall of the probe head is provided with a second vertical groove and a second spiral groove; the lower end of the second vertical groove is connected to the lower end of the second spiral groove; when the third retaining pin is engaged with the second vertical groove, the transmission sleeve moves axially relative to the probe head; when the third retaining pin is engaged with the second spiral groove, the transmission sleeve drives the probe head to move axially.

[0012] In some embodiments of the present invention, the probe head is provided with a second shaft hole; the second shaft body and the second shaft hole surface are fitted to restrict the rotational degree of freedom of the probe head.

[0013] In some embodiments of the present invention, the lower end of the probe is provided with a conical head, with the small end of the conical head facing down and the large end facing up.

[0014] The combined NTC smart sensor of the present invention, through optimized structural design, has the following beneficial effects: This invention utilizes a structure where the axial movement of the transmission sleeve compresses the elastic expansion block. The elastic deformation of the expansion block compensates for the dimensional tolerances of the mounting hole, reducing the impact of assembly force variations on positioning accuracy and achieving stable and reliable installation positioning. Through the transmission structure between the rotating cylinder and the transmission sleeve, and between the transmission sleeve and the probe, the extension depth of the probe can be flexibly adjusted to meet measurement needs in different scenarios, and the adjustment process is simple and efficient. The cooperation between the fan-shaped adjustment window and the elastic locking pin ensures reliable locking of the rotating cylinder, and the conical head design of the probe improves assembly guidance, facilitating quick and accurate installation. The overall structure of this invention is compact and reasonable, balancing installation stability, adjustment flexibility, ease of operation, and reliability, effectively solving the pain points of existing technologies and broadening the applicable scenarios for sensors. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a cross-sectional schematic diagram of the present invention; Figure 3 This is an exploded view of the present invention; Figure 4 This is a schematic cross-sectional view of the present invention after the elastic expansion block has extended; Figure 5 This is a cross-sectional schematic diagram of the present invention after the probe head has been extended; Figure 6 This is a schematic diagram of the structure of the sensor body of the present invention; Figure 7 This is a cross-sectional schematic diagram of the sensor body of the present invention; Figure 8 This is a schematic diagram of the structure of the rotating cylinder of the present invention; Figure 9 This is a schematic diagram of the transmission sleeve of the present invention; Figure 10 This is a schematic diagram of the probe head of the present invention; Figure 11 This is an installation diagram of the present invention; Explanation of reference numerals in the attached drawings: 1. Sensor body; 11. First shaft hole; 12. First shaft; 13. Second shaft; 14. Sliding hole; 15. Fan-shaped adjustment window; 16. Adjustment slot; 17. First vertical groove; 18. Circular groove; 2. Probe head; 21. Conical head; 22. Second shaft hole; 23. Second vertical groove; 24. Second spiral groove; 3. Rotating cylinder; 31. Adjusting arm; 32. Elastic locking pin; 33. Second locking pin; 4. Transmission sleeve; 41. Extrusion head; 42. First locking pin; 43. First spiral groove; 44. Third locking pin; 5. Elastic tightening block; 51. Driving inclined plane. Detailed Implementation

[0016] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, but this is not to limit the scope of the invention to this.

[0017] like Figures 1 to 11 As shown, the combined NTC smart sensor described in this embodiment includes a sensor body 1; the sensor body 1 is provided with a first shaft hole 11; a first shaft body 12 is provided extending downward from its inner top surface inside the first shaft hole 11; a second shaft body 13 with a cross-sectional area smaller than the cross-sectional area of ​​the first shaft body 12 is provided extending downward from its bottom surface of the first shaft body 12, forming a stepped shaft structure; a rotating cylinder 3 is rotatably sleeved on the outer peripheral wall of the first shaft body 12. The combined NTC smart sensor also includes a probe head 2; the probe head 2 is fitted onto the outer peripheral wall of the second shaft 13; the lower end of the probe head 2 protrudes downward from the first shaft hole 11 to detect external environmental parameters; a transmission sleeve 4 is movably fitted between the inner peripheral wall of the rotating cylinder 3 and the outer peripheral wall of the probe head 2; the lower end of the transmission sleeve 4 protrudes downward from the lower end of the rotating cylinder 3. The inner circumferential wall of the rotating cylinder 3 is connected to the outer circumferential wall of the transmission sleeve 4, enabling the rotating cylinder 3 to drive the transmission sleeve 4 to achieve axial movement and rotational motion; the inner circumferential wall of the transmission sleeve 4 is connected to the outer circumferential wall of the probe head 2, enabling the transmission sleeve 4 to drive the probe head 2 to move axially when rotating. The lower end of the sensor body 1 has multiple radially arranged sliding holes 14 extending through it circumferentially. Each sliding hole 14 contains a sliding elastic expansion block 5, which is pressed to extend radially outward when the transmission sleeve 4 moves axially. The elastic expansion block 5 can be made of rubber, maintaining elasticity while providing tension force. Its specific dimensions can be flexibly designed according to the specifications of the sensor body 1 and the actual size of the mounting hole. Typically, the number of sliding holes 14 is set to 3-4, evenly distributed circumferentially to ensure balanced tension force.

[0018] Specifically, in practical applications, the lower end of the probe 2 is inserted into the mounting hole of the external mounting position. By rotating the rotating cylinder 3, the rotating cylinder 3 drives the transmission cylinder to move axially through the transmission structure between it and the transmission sleeve 4. During the axial movement, the transmission cylinder simultaneously squeezes each elastic expansion block 5, causing the elastic expansion blocks 5 to extend radially outward, such as... Figure 4 and Figure 11 As shown, it forms a tight elastic compression contact with the inner wall of the mounting hole. The elastic deformation of the elastic expansion block 5 compensates for the dimensional tolerance of the mounting hole, while reducing the impact of assembly force fluctuations on positioning accuracy during assembly, ensuring that the sensor is stable and reliable after installation. If the height of probe 2 needs to be adjusted to meet the measurement requirements of the current installation scenario, the rotating cylinder 3 continues to rotate. At this time, the rotating cylinder 3, through a transmission structure, switches from simple axial movement to rotational motion. During rotation, the transmission structure between the cylinder and probe 2 converts the rotational motion into a force that drives probe 2 to extend axially downwards, thereby adjusting the height of probe 2 until probe 2 extends to the desired depth and then stops rotating. Figure 5 and Figure 11 As shown, during the measurement process, the above rotation operation can be repeated according to different measurement depth requirements to realize the parameter measurement of probe 2 at different depth states.

[0019] like Figures 1 to 8 As shown, based on the above embodiment, the upper end of the sensor body 1 is further provided with a fan-shaped adjustment window 15; the upper end of the outer peripheral wall of the rotating cylinder 3 is provided with an adjustment arm 31 extending into the adjustment window; the fan-shaped adjustment window 15 is provided with adjustment slots 16 evenly distributed; the adjustment arm 31 is provided with an elastic locking pin 32; the elastic locking pin 32 cooperates with the adjustment slot 16 to lock the rotating cylinder 3 in an unlockable manner. Specifically, in this embodiment, a fan-shaped adjustment window 15 is provided to provide operating space for the adjustment arm 31. The fan-shaped adjustment window 15 provides a limited angle operating space for the adjustment arm 31. The central angle of the fan-shaped adjustment window 15 is set according to actual design needs to meet the rotation stroke requirements of the rotating cylinder 3. The user can drive the rotating cylinder 3 to rotate by swinging the adjustment arm 31 within the fan-shaped adjustment window 15. The number of adjustment slots 16 is set according to the rotation accuracy requirements of the rotating cylinder 3. The elastic locking pin 32 cooperates with the adjustment slots 16 at different positions to achieve multi-level locking of the rotating cylinder 3, thereby fixing the positions of the transmission sleeve 4 and the probe head 2 to meet the usage requirements of different installation positioning and detection depths.

[0020] like Figure 6 and Figure 8 As shown, based on the above embodiment, the top and bottom surfaces of the fan-shaped adjustment window 15 are further provided with adjustment slots 16; the top and bottom surfaces of the adjustment arm 31 are provided with elastic locking pins 32. By providing adjustment slots 16 on both the top and bottom surfaces of the fan-shaped adjustment window 15, and correspondingly providing elastic locking pins 32 on the top and bottom surfaces of the adjustment arm 31, the locking of the adjustment arm 31 within the fan-shaped adjustment window 15 is made more stable, avoiding loosening of the lock due to locking in a single direction, thus improving the reliability of the rotating cylinder 3 after locking. At the same time, the double-sided locking pin cooperation also makes the force on the adjustment arm 31 more balanced during swinging, reducing jamming.

[0021] Preferably, such as Figure 6 and Figure 8As shown, there are two fan-shaped adjustment windows 15, symmetrically arranged. Each fan-shaped adjustment window 15 has an evenly distributed adjustment slot 16. There are also two corresponding adjustment arms 31, symmetrically arranged. Each adjustment arm 31 extends into its corresponding fan-shaped adjustment window 15. Each adjustment arm 31 is equipped with a spring-loaded locking pin 32. Specifically, the user can operate by simultaneously moving both adjustment arms 31, or choose to move one side depending on the operating space, improving operational flexibility. The cooperation of the adjustment windows and adjustment arms 31 on both sides further enhances the stability of the rotating cylinder 3 during rotation, preventing unilateral force from causing the rotating cylinder 3 to tilt. Simultaneously, the cooperation of the spring-loaded locking pins 32 on both sides with the adjustment slots 16 makes the locking effect more reliable, suitable for scenarios requiring high installation accuracy and stability.

[0022] like Figures 2 to 7 , Figure 9 As shown, based on the above embodiment, the lower end of the transmission sleeve 4 is further provided with a pressing head 41; the outer peripheral wall of the pressing head 41 is provided with a first locking pin 42; the inner peripheral wall of the first shaft hole 11 is provided with a first vertical groove 17 and a circular groove 18 communicating with the lower end of the first vertical groove 17; when the first locking pin 42 is engaged with the first vertical groove 17, the transmission sleeve 4 can move axially; when the first locking pin 42 is engaged with the circular groove 18, the transmission sleeve 4 can rotate. Specifically, the extrusion head 41 is integrally formed with the transmission sleeve 4, and its outer peripheral wall is smooth. The first locking pin 42 adopts a cylindrical protrusion structure and is integrally formed with the extrusion head 41 or fixed by thread connection. The length of the first vertical groove 17 matches the axial movement stroke required by the transmission sleeve 4. The diameter of the circular groove 18 is slightly larger than the diameter of the first locking pin 42, ensuring that the first locking pin 42 can rotate freely in the circular groove 18. When the rotating cylinder 3 drives the transmission sleeve 4 to move initially, the first locking pin 42 slides along the first vertical groove 17, restricting the rotational freedom of the transmission sleeve 4, so that it can only move axially to complete the action of extruding the elastic expansion block 5. When the transmission sleeve 4 moves axially to the lower end of the first vertical groove 17, the rotating cylinder 3 continues to rotate, and the first locking pin 42 enters the circular groove 18. At this time, the rotational freedom of the transmission sleeve 4 is released, and it can rotate synchronously with the rotating cylinder 3 to realize the switching of motion state.

[0023] like Figures 2 to 4As shown, based on the above embodiment, the inner side of the elastic expansion block 5 is further provided with a driving inclined surface 51 for contacting and cooperating with the extrusion head 41. Specifically, the driving inclined surface 51 is integrally formed with the inner wall of the elastic expansion block 5, and the driving inclined surface 51 forms a 30-60° angle with the radial direction of the elastic expansion block 5. When the transmission sleeve 4 drives the extrusion head 41 to move axially downward, the outer peripheral wall of the extrusion head 41 contacts the driving inclined surface 51. Through the guiding effect of the inclined surface, the axial extrusion force is converted into a driving force that drives the elastic expansion block 5 to extend radially outward, making the extension action of the elastic expansion block 5 smoother, and at the same time reducing the friction during the extrusion process and preventing the elastic expansion block 5 from jamming.

[0024] like Figure 8 and Figure 9 As shown, based on the above embodiment, the inner peripheral wall of the rotating cylinder 3 is further provided with a second locking pin 33; the outer peripheral wall of the transmission sleeve 4 is provided with a first spiral groove 43; the second locking pin 33 is movably embedded in the first spiral groove 43. Specifically, the second locking pin 33 is integrally formed with the inner peripheral wall of the rotating cylinder 3 or fixed by screws, and its end is hemispherical to reduce friction when it engages with the first spiral groove 43; the pitch of the first spiral groove 43 is designed according to the axial movement speed required by the transmission sleeve 4 and the rotation angle of the rotating cylinder 3, and is usually 2-5mm; when the rotating cylinder 3 rotates, the second locking pin 33 slides along the groove wall of the first spiral groove 43. Due to the spiral structure of the first spiral groove 43, the rotational motion of the rotating cylinder 3 is converted into the power to drive the axial movement of the transmission sleeve 4. At the same time, after the first locking pin 42 enters the circular groove 18, the second locking pin 33 abuts against the upper end wall of the first spiral groove 43, thereby driving the transmission sleeve 4 to rotate synchronously, realizing the continuous switching between the axial movement and rotational motion of the transmission sleeve 4.

[0025] like Figure 9 and Figure 10As shown, based on the above embodiment, the inner peripheral wall of the transmission sleeve 4 is further provided with a third retaining pin 44; the outer peripheral wall of the probe head 2 is provided with a second vertical groove 23 and a second spiral groove 24; the lower end of the second vertical groove 23 is connected to the lower end of the second spiral groove 24; when the third retaining pin 44 engages with the second vertical groove 23, the transmission sleeve 4 moves axially relative to the probe head 2; when the third retaining pin 44 engages with the second spiral groove 24, the transmission sleeve 4 drives the probe head 2 to move axially. Specifically, the structure of the third locking pin 44 is similar to that of the second locking pin 33, with a hemispherical end. The length of the second vertical groove 23 matches the axial movement stroke of the transmission sleeve 4 relative to the probe head 2. The pitch of the second spiral groove 24 is designed according to the extension speed required by the probe head 2. When the transmission sleeve 4 initially moves axially, the third locking pin 44 slides along the second vertical groove 23. At this time, the transmission sleeve 4 only moves relative to the probe head 2, while the probe head 2 remains stationary. When the transmission sleeve 4 rotates, the third locking pin 44 enters the second spiral groove 24 from the lower end of the second vertical groove 23. Through the guiding effect of the second spiral groove 24, the rotational motion of the transmission sleeve 4 is converted into the power to drive the axial movement of the probe head 2, thereby realizing the extension or retraction of the probe head 2. The structure is compact and has high transmission efficiency.

[0026] like Figure 6 , Figure 7 as well as Figure 10 As shown, based on the above embodiment, the probe head 2 is further provided with a second shaft hole 22; the second shaft body 13 is surface-fitted with the second shaft hole 22 to restrict the rotational freedom of the probe head 2. Specifically, the second shaft hole 22 is located at the axial position of the probe head 2, and the mating surface of the second shaft body 13 and the second shaft hole 22 adopts a square, hexagonal or other non-circular cross section to ensure that the second shaft body 13 can restrict the rotational movement of the probe head 2, allowing the probe head 2 to move only along the axial direction of the second shaft body 13; the clearance of the surface fit is controlled between 0.01-0.05mm, which ensures both the smooth movement of the probe head 2 and the coaxiality of the probe head 2, avoiding the probe head 2 from shifting and affecting the measurement accuracy.

[0027] like Figure 10 As shown, based on the above embodiment, the lower end of the probe 2 is further provided with a conical head 21, with the smaller end of the conical head 21 facing downwards and the larger end facing upwards. Specifically, the conical head 21 is integrally formed with the probe 2, the cone angle of the conical head 21 is set to 30°-60°, and the diameter of the smaller end is designed according to the minimum diameter of the mounting hole; the structure of the conical head 21 facilitates the quick insertion of the probe 2 into the mounting hole, serves as a guide, and reduces assembly difficulty.

[0028] The above description is only a preferred embodiment of the present invention. Therefore, any equivalent changes or modifications made to the structure, features and principles described in the claims of this patent application are included within the protection scope of this patent application.

Claims

1. A combined NTC smart sensor, characterized in that, The sensor body includes a sensor body and a probe head. The sensor body has a first shaft hole. A first shaft extends from the first shaft hole. A second shaft extends from the first shaft and has a cross-sectional area smaller than that of the first shaft. A rotating cylinder is rotatably fitted onto the outer peripheral wall of the first shaft. The probe head is fitted onto the outer peripheral wall of the second shaft. The lower end of the probe head protrudes downward from the first shaft hole. A transmission sleeve is movably fitted between the inner peripheral wall of the rotating cylinder and the outer peripheral wall of the probe head. The lower end of the transmission sleeve protrudes downward from the lower end of the rotating cylinder. The inner circumferential wall of the rotating cylinder is connected to the outer circumferential wall of the transmission sleeve, enabling the rotating cylinder to drive the transmission sleeve to achieve axial movement and rotational motion; the inner circumferential wall of the transmission sleeve is connected to the outer circumferential wall of the probe head, enabling the transmission sleeve to drive the probe head to move axially when it rotates. The lower end of the sensor body is provided with multiple radially arranged sliding holes along the circumference; each sliding hole is provided with an elastic expansion block, so that when the transmission sleeve moves axially, the elastic expansion block can be squeezed to extend outward radially.

2. The combined NTC smart sensor according to claim 1, characterized in that, The upper end of the sensor body is provided with a fan-shaped adjustment window; the upper end of the outer peripheral wall of the rotating cylinder is provided with an adjustment arm extending into the adjustment window; the fan-shaped adjustment window is provided with adjustment slots; the adjustment arm is provided with an elastic locking pin; the elastic locking pin cooperates with the adjustment slot to lock the rotating cylinder in an unlockable manner.

3. The combined NTC smart sensor according to claim 2, characterized in that, The top and bottom surfaces of the fan-shaped adjustment window are evenly provided with adjustment slots; the top and bottom surfaces of the adjustment arm are provided with elastic locking pins.

4. A combined NTC smart sensor according to claim 2 or 3, characterized in that, The number of the fan-shaped adjustment windows is two, and the two fan-shaped adjustment windows are symmetrically arranged; each fan-shaped adjustment window has an adjustment slot evenly distributed inside; The number of the adjusting arms is set to two, and the two adjusting arms are symmetrically arranged; the two adjusting arms extend into the corresponding sector-shaped adjusting window one by one; each adjusting arm is provided with an elastic locking pin.

5. A combined NTC smart sensor according to claim 1, characterized in that, The lower end of the transmission sleeve is provided with a pressing head; the outer peripheral wall of the pressing head is provided with a first locking pin; the inner peripheral wall of the first shaft hole is provided with a first vertical groove and a circular groove communicating with the lower end of the first vertical groove; when the first locking pin is engaged with the first vertical groove, the transmission sleeve can move axially; when the first locking pin is engaged with the circular groove, the transmission sleeve can rotate.

6. A combined NTC smart sensor according to claim 5, characterized in that, The inner side of the elastic expansion block is provided with a driving slope for contacting and engaging with the extrusion head.

7. A combined NTC smart sensor according to claim 1, characterized in that, The inner circumferential wall of the rotating cylinder is provided with a second locking pin; the outer circumferential wall of the transmission sleeve is provided with a first spiral groove; the second locking pin is movably embedded in the first spiral groove.

8. A combined NTC smart sensor according to claim 1, characterized in that, The inner circumferential wall of the transmission sleeve is provided with a third retaining pin; the outer circumferential wall of the probe head is provided with a second vertical groove and a second spiral groove; the lower end of the second vertical groove is connected to the lower end of the second spiral groove; when the third retaining pin is engaged with the second vertical groove, the transmission sleeve moves axially relative to the probe head; when the third retaining pin is engaged with the second spiral groove, the transmission sleeve drives the probe head to move axially.

9. A combined NTC smart sensor according to claim 1, characterized in that, The probe head is provided with a second shaft hole; the second shaft body and the second shaft hole are fitted together to restrict the rotational freedom of the probe head.

10. A combined NTC smart sensor according to claim 1, characterized in that, The lower end of the probe is provided with a conical head, with the small end of the conical head facing down and the large end facing up.

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