CN217819061U

CN217819061U - Temperature measurement structure and charging device

Info

Publication number: CN217819061U
Application number: CN202220931913.5U
Authority: CN
Inventors: 王超; 陈宏磊
Original assignee: Changchun Jetty Automotive Parts Co Ltd
Current assignee: Changchun Jetty Automotive Parts Co Ltd
Priority date: 2022-04-21
Filing date: 2022-04-21
Publication date: 2022-11-15
Anticipated expiration: 2032-04-21

Abstract

The utility model provides a temperature measurement structure and charging device, belongs to temperature monitoring technical field, including temperature sensor, support, measured object and fixing base, temperature sensor sets up on the support to with at least part the measured object contact is connected, set up support piece on the support, support piece with form the measured object between the temperature sensor and insert the joining region, at least part the measured object with measured object grafting district interference fit. The measured object inserts the district and can provides the clamp force to the measured object, prevents on the one hand that it from removing, and on the other hand can make it inseparabler with the temperature sensor laminating, avoids the measured object plug to cause temperature sensor and measured object to have the temperature measurement value that air gap leads to inaccurate or the difference in temperature great. Reasonable clamping force can ensure the tightness of the measured object and the temperature sensor and can prevent the measured object from being difficult to install.

Description

Temperature measurement structure and charging device

Technical Field

The utility model relates to a temperature monitoring technology field, more specifically relates to a temperature measurement structure and a charging device.

Background

A temperature sensor refers to a sensor that senses temperature and converts it into a usable output signal. The contact type temperature measuring device is simple and reliable, and the measuring precision is high. However, the temperature measuring device must be in contact with the measured medium to measure the temperature, and the temperature of the measured object can be measured more accurately only by keeping a certain pressure between the mounted measured object and the temperature measuring device. However, the current temperature measurement structure only enables the measured object to be in contact with the temperature sensor, and when the installation environment vibrates or moves, the measured object can displace, so that the measured object and the temperature sensor deviate and cannot be in close contact, and the temperature measured by the temperature sensor is inaccurate. In the field of new energy vehicles, if a control system of a charging device executes wrong temperature control measures according to inaccurate temperature information, the charging efficiency is influenced slightly, and the charging device is burnt due to overhigh temperature. At present, a mode capable of providing continuous pressure and enabling a measured object to be attached to a temperature sensor more tightly is lacked. Therefore, there is a need in the art for a temperature measuring structure in which a temperature sensor is in close contact with a measured object to accurately measure the temperature of the measured object.

SUMMERY OF THE UTILITY MODEL

The utility model provides a can provide continuous pressure and can predetermine the position to temperature sensor and carry out the structure adjusted.

The utility model provides a temperature measurement structure, includes temperature sensor, support, measured object and fixing base, temperature sensor sets up on the support, and with at least part the measured object contact is connected, set up support piece on the support, support piece with form the measured object between the temperature sensor and insert the district, at least part the measured object with the measured object is pegged graft and is distinguished interference fit.

The bracket is provided with a groove, and the temperature sensor is arranged in the groove.

The recess is in the orientation one side of testee sets up the opening, temperature sensor sets up the temperature measurement face, the temperature measurement face with the open-ended lateral surface flushes or protrusion in the open-ended lateral surface.

The support piece and the temperature sensor are respectively positioned on two sides of the measured object.

The bracket is provided with a shaft pin on one side opposite to the temperature sensor, the fixed seat is provided with a fixed hole, the shaft pin is inserted into the fixed hole and connected with the fixed hole, and the bracket, the temperature sensor and the measured object can move relative to the fixed seat.

The supporting piece deforms along with the change of the environmental temperature.

The support piece is made of plastic, the shaft pin is made of metal, and one part of the shaft pin is arranged in the support piece.

At least one bulge is arranged on the contact surface of the support piece and the object to be measured.

The support member applies a pressure to the contact surface of the temperature sensor, the pressure having a value of 0.05N-195N.

The support piece is far away from one end of the support and faces to the edge of one side of the measured object, and a chamfer or a radius is arranged on the edge.

The pin and the support are integrally formed, the pin comprises a cylinder and a cap body, one end of the cylinder is connected with the support, the other end of the cylinder is connected with the cap body, the radial size of the cap body is larger than that of the cylinder, the distance from the bottom of the cap body to the support is larger than or equal to the thickness of the fixing seat, the fixing hole comprises a positioning groove and a mounting hole which are mutually communicated, the diameter of the mounting hole is larger than or equal to that of the cap body, and the width of the positioning groove is larger than or equal to that of the cylinder but smaller than that of the cap body.

The cylinder is further provided with an annular bulge, and the annular bulge can be in interference fit with the positioning groove.

The plane of the annular bulge and the cross section of the column body form an included angle.

The shaft pin and the support are of a split structure, a threaded hole is formed in one side, opposite to the temperature sensor, of the support, an external thread is arranged on one side of the shaft pin, a nut is arranged at the end of the other side of the shaft pin, and the shaft pin penetrates through the fixing hole and is in threaded connection with the external thread and the threaded hole.

The bracket is also provided with a clamping ring, the clamping ring is provided with a through opening, and the width of the through opening is smaller than the diameter of the clamping ring; the fixing seat is provided with a fixing frame and a fixing shaft arranged on the fixing frame, the fixing shaft is clamped in the clamping ring through the through opening, and the width of the through opening is smaller than or equal to the diameter of the fixing shaft.

The charging device comprises the temperature measuring structure, the measured object is a terminal, and the support piece and the clamping ring are respectively positioned on two sides of the terminal.

The utility model discloses an intentional effect does:

1. the measured object inserts the district and can provides the clamp force to the measured object, prevents its removal on the one hand, and on the other hand can make it inseparabler with the temperature sensor laminating, avoids the measured object plug to cause temperature sensor and measured object to have the inaccurate or difference in temperature that air gap leads to. Reasonable clamping force can ensure the tightness of the measured object and the temperature sensor and can prevent the measured object from being difficult to install.

2. The support can drive the temperature sensor to rotate by taking the shaft pin as the shaft, so that a proper position is conveniently selected for measuring the temperature of the measured object.

3. The groove can fix the temperature sensor and prevent the temperature sensor from moving.

4. The pivot setting is in support piece, except can letting the support rotatory, more can play the reinforcing effect to the support piece of plastics material, makes its holistic elasticity level can obtain maintaining, avoids plastics ageing and reduces the extrusion force to the testee.

5. The clamping ring is matched with the fixed shaft to conveniently arrange the support on the fixed seat, and the column body and the cap body of the shaft pin are matched with the mounting hole to facilitate the support mounting and prevent the support from falling off.

Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments of the invention, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.

Fig. 1 is a side view of the temperature measuring structure of the present invention.

Fig. 2 is a schematic view of the support structure of the temperature measuring structure of the present invention.

Fig. 3 is a bottom view of the fixing base of the temperature measuring structure of the present invention.

Fig. 4 is the schematic diagram of the preset position of the temperature measuring structure of the present invention.

The figures are labeled as follows:

1-temperature sensor, 2-bracket, 21-support, 3-object to be measured, 4-fixing seat, 41-positioning groove, 42-mounting hole, 5-shaft pin, 51-column, 52-cap body, 53-annular bulge, 7-object to be measured insertion area, 8-clamping ring and 81-through opening.

Detailed Description

Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: unless specifically stated otherwise, the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention.

The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.

In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.

The utility model provides a temperature measurement structure, as shown in fig. 1 and fig. 2, includes temperature sensor 1, support 2, measured object 3 and fixing base 4, temperature sensor 1 sets up on the support 2 to with at least part the 3 contacts of measured object are connected, set up support piece 21 on the support 2, support piece 21 with form the measured object between the temperature sensor 1 and insert district 7, at least part the measured object 3 with the measured object inserts district 7 interference fit.

In practical use, because the object to be measured 3 is often in a vibration environment, the object to be measured 3 moves, so that the object to be measured cannot be parallel to and in contact with the temperature measuring surface of the temperature sensor 1, and the object to be measured 3 and the temperature measuring surface are not tightly attached. This will cause the temperature measured by the temperature sensor 1 to be inaccurate, and the control system will execute an incorrect temperature control measure according to the inaccurate temperature information, causing the related devices to be over-heated and burnt out.

The measured object 3 is inserted in the insertion area 7 and is in interference fit with the insertion area 7, so that the temperature measuring surface of the temperature sensor 1 can be always kept in contact with the measured object 3, and the temperature of the measured object 3 can be measured more accurately.

In some embodiments, the holder 2 is provided with a recess, as shown in fig. 2, in which the temperature sensor 1 is arranged. The recess can be better fixed with temperature sensor 1, prevents that temperature sensor 1 from breaking away from the operating position in rocking. The recess is at the terminal surface of one side that temperature sensor 1 put into, interior limit edges and corners department at the recess, set up chamfer or radius, can make temperature sensor 1 under the effect of direction, more smooth insert in the recess, the recess still sets up on the terminal surface of one side that temperature sensor 1 put into and has elastic blocking hook, when temperature sensor 1 puts into the recess, can will block the hook and remove the position that does not influence temperature sensor 1 and put into, put into the back when temperature sensor 1, blocking hook can block temperature sensor 1's terminal surface, make temperature sensor 1 can not break away from in the recess. If it is necessary to disengage the temperature sensor 1 from the recess, the blocking hook needs to be deformed to move to a position that does not affect the extraction of the temperature sensor 1.

In some embodiments, the groove is provided with an opening on a side facing the object to be measured 3, and the temperature sensor 1 is provided with a temperature measuring surface which is flush with or protrudes from an outer side surface of the opening. The temperature measuring surface protrudes out of the opening or is parallel and level to the opening, so that the temperature sensor 1 can be better attached to the measured object 3, and the temperature value measured by the temperature sensor 1 is closer to the true value.

In some embodiments, a support 21 is disposed on the bracket 2, and the support 21 and the temperature sensor 1 are respectively located on two sides of the object 3 to be measured. The support 21 and the temperature sensor 1 support the object 3 from two sides, and prevent the object 3 from moving relative to the fixed seat 4. And the support 21 can extrude the measured object 3 to the temperature measuring surface of the temperature sensor 1, so that the measured object 3 can be tightly attached to the temperature measuring surface of the temperature sensor 1 to obtain a more accurate temperature value of the measured object 3.

In some embodiments, the bracket 2 is provided with a shaft pin 5 on a side opposite to the temperature sensor 1, the fixing seat 4 is provided with a fixing hole, the shaft pin 5 is inserted into the fixing hole and connected, and the bracket 2, the temperature sensor 1 and the object to be measured 3 are movable relative to the fixing seat 4.

The bracket 2 comprises one side provided with the temperature sensor 1 and the other side opposite to the one side, the other side is provided with a shaft pin 5, and the shaft pin 5 is connected with the fixed seat 4 through a fixing hole. The support 2 can drive the temperature sensor 1 to rotate by taking the shaft pin 5 as a shaft, and when the measured object 3 rotates and displaces, the support 2 can drive the temperature sensor 1 to rotate along with the measured object 3, so that the temperature measuring surface of the temperature sensor 1 is always in contact with the measured object 3, and the temperature of the measured object 3 can be measured more accurately.

In some embodiments, the support 21 deforms as the ambient temperature changes. Under most circumstances, the ambient temperature of the measured object 3 can change greatly when in use, the gap between the measured object 3 and the temperature sensor 1 can increase along with the increase of the ambient temperature, so that the temperature sensor 1 cannot accurately measure the actual temperature of the measured object 3, the temperature measured by the temperature sensor 1 is inaccurate, and the control system can execute wrong temperature control measures according to inaccurate temperature information to cause the related devices to be burnt due to overhigh temperature. Therefore, when the ambient temperature increases, the volume of the support member 21 also increases to provide a larger pressure, so that the measured object 3 and the temperature sensor 1 are closely attached to each other, thereby ensuring that the temperature sensor 1 can accurately measure the actual temperature of the measured object 3. When the ambient temperature decreases, the volume of the support 21 also decreases, but the gap between the measured object 3 and the temperature sensor 1 also decreases, so that the measured object 3 and the temperature sensor 1 are closely attached.

The characteristic of the support 21 deforming with the change of the environmental temperature is that the support 21 can be made of a material with a large expansion rate, and the material with the large expansion rate can change the whole volume with the change of the environmental temperature. The supporting member 21 can also be made of a combination of materials with different expansion rates, and when the ambient temperature changes, the supporting member 21 made of the combination of materials with different expansion rates can bend or twist, so as to generate a greater pressure to be applied to the object 3 to be measured, so that the object 3 to be measured and the temperature sensor 1 can be tightly attached.

In some embodiments, the support member 21 is made of plastic, the shaft pin 5 is made of metal, and a portion of the shaft pin 5 is disposed in the support member 21. The support 21 made of plastic can be easily in interference fit with the object 3 to be measured, and generates extrusion force on the object 3 to be measured. However, the plastic material is easy to age and reduce elasticity during long-time extrusion, and the shaft pin 5 is arranged in the support 21, so that the support 2 can rotate, the support 21 can be reinforced, the overall elasticity level can be maintained, and the extrusion force of the measured object 3 caused by aging of the plastic material is prevented from being reduced.

In some embodiments, at least one protrusion is disposed on the contact surface of the support member 21 and the object 3 to be measured. Set up protruding can make support piece 21 better to the measured object 3 exert the extrusion force, both prevent that measured object 3 from taking place to remove, can make its laminating temperature sensor 1 again, obtain more accurate measured value.

In some embodiments, the support 21 applies a pressure to the contact surface of the temperature sensor 1, the pressure having a value of 0.05N-195N.

In order to test the effect of the pressure provided by the support 21 on the accuracy of the temperature sensor 1, the inventors made relevant tests. The inventor chooses the same measured object 3 and the same temperature sensors 1 are arranged on the same bracket 2. The method comprises the steps of selecting a test sensor to be arranged on a measured object 3 and tightly attached to the measured object 3, selecting different support members 21, enabling different support members 21 to provide different reset forces and different pressures between a temperature sensor 1 and the measured object 3, enabling the temperature of the measured object 3 to start rising after the measured object 3 works, enabling the temperature to tend to be stable after 20 minutes, recording a temperature value y collected by the test sensor and a temperature value x collected by the temperature sensor 1 connected with the different support members 21 at the same time, and calculating the ratio of x/y, wherein the ratio of x/y is greater than 99.95% and is an ideal state. The results are shown in Table 1.

Table 1: influence of the pressure provided by the support 21 on the accuracy of the temperature sensor 1

As can be seen from table 1, when the force applied by the support 21 to the object 3 to be measured is less than 0.05N, the temperature value acquired by the temperature sensor 1 is too different from the temperature value acquired by the test sensor, and the ratio of the temperature value acquired by the temperature sensor 1 to the temperature value acquired by the test sensor is less than 99.95%, so that the force applied by the support 21 to the object 3 to be measured by the inventor is greater than or equal to 0.05N, and when the force applied by the support 21 to the object 3 to be measured is greater than 195N, the temperature measured by the temperature sensor 1 is very close to the temperature measured by the test sensor, and then the greater force contrast value is not affected, and the support 21 providing a greater force will make the installation of the object 3 to be measured more difficult, so that the pressure provided by the support 21 selected by the inventor is 0.05N to 195N.

In some embodiments, the support 21 is chamfered or rounded at the corner on the side facing the object 3 at the end facing away from the bracket. The rounding or chamfering can guide the object to be measured 3 into the object to be measured insertion area 7, and prevent the support 21 from impacting the object to be measured 3 rigidly to damage the coating on the surface of the object to be measured 3, so that the resistance of the object to be measured 3 is increased, and the conductivity is reduced.

In some embodiments, the pivot pin 5 is integrally formed with the bracket 2, the pivot pin 5 includes a post 51 and a cap 52, the post 51 is connected to the bracket 2 at one end and connected to the cap 52 at the other end, the cap 52 has a radial dimension larger than that of the post 51, and a distance from a bottom of the cap 52 to the bracket 2 is greater than or equal to a thickness of the fixing seat 4. The fixing holes include a positioning groove 41 and a mounting hole 42 which are communicated with each other, as shown in fig. 3, the diameter of the mounting hole 42 is greater than or equal to the diameter of the cap body 52, and the width of the positioning groove 41 is greater than or equal to the diameter of the column 51 but smaller than the diameter of the cap body 52. The axle pin 5 is inserted into the mounting hole 42 and then transversely pushed into the positioning slot 41, and the diameter of the cap body 52 is larger than the width of the positioning slot 41 and smaller than the diameter of the mounting hole 42, so that the axle pin can pass through the mounting hole 42 and not pass through the positioning slot 41, and the aim of preventing the axle pin 5 from falling out of the positioning slot 41 is fulfilled.

Further, the cylinder 51 is further provided with an annular protrusion 53, as shown in fig. 2, the annular protrusion 53 can be in interference fit with the positioning groove 41.

Thus, when the temperature measuring device is installed, the shaft pin 5 can obliquely pass through the installation hole 42, the annular protrusion 53 is clamped above the positioning groove 41, the temperature sensor 1 is not perpendicular to the fixing seat 4 at the moment, as shown in fig. 4, the temperature measuring surface of the temperature sensor 1 faces the insertion direction of the measured object 3, and the inserted measured object 3 can prevent the measured object 3 from being inaccurate in insertion direction and being in rigid contact with the top of the temperature sensor 1, so that the temperature sensor 2 is damaged. After the temperature measuring surface of the temperature sensor 1 is designed, the measured object 3 is guided, and after the measured object 3 is inserted into the measured object insertion region 7, the annular protrusion 53 penetrates through the positioning groove 41 downwards by further force, so that the installation is completed, as shown in fig. 1. The thickness of the fixing seat 4 at the fixing hole is smaller than the thickness of other positions of the fixing seat 4, so that deformation is easy to occur, and the annular bulge 53 is conveniently clamped in. At the moment, the temperature measuring surfaces of the measured object 3 and the temperature sensor 1 are perpendicular to the fixed seat 4. The diameter of the cylinder 51 is preferably smaller than the width of the positioning groove 41, so that after installation, the shaft pin 5 can have a certain moving space, and when the object 3 to be measured shakes, the bracket 2 also has a moving amount, so that the phenomenon that the surface of the object 3 to be measured is damaged or the temperature sensor 1 is damaged due to too strong shaking force of the object 3 to be measured is prevented.

Further, the plane of the annular protrusion 53 forms an included angle with the cross section of the column 51. Thus, in the process of inserting the annular protrusion 53 into the positioning groove 41, the annular protrusion does not completely enter the positioning groove 41 at a time, but one side of the annular protrusion first enters the positioning groove 41 and then completely enters the positioning groove, so that the annular protrusion 53 can enter the positioning groove 41 more easily than the whole annular protrusion, and the force applied to the annular protrusion 53 can be smaller.

Furthermore, the annular protrusion 53 is smoothly transited to the column 51. This allows for less force to be required when applying force to move the annular projection 53 through the detent 41.

In some embodiments, the shaft pin 5 and the bracket 2 are of a separate structure, the bracket 2 is provided with a threaded hole on a side opposite to the temperature sensor 1, one side of the shaft pin 5 is provided with an external thread, the other side end of the shaft pin is provided with a nut, and the shaft pin 5 passes through the fixing hole and is in threaded connection with the threaded hole. The shaft pin 5 firstly passes through the fixing hole from the lower part and then is in threaded connection with the threaded hole of the bracket 2, and the rotating shaft 5 and the fixing seat 4 can be connected together through the nut. Before the nut is screwed, the position of the bracket 2 is adjusted by rotating by taking the shaft pin 5 as a shaft, and after the position is adjusted to a proper position, the nut is screwed to relatively fix the bracket 2 and the base 4.

In some embodiments, the bracket 2 is further provided with a clamping ring 8, the clamping ring 8 is provided with a through opening 81, and the width of the through opening 81 is smaller than the diameter of the clamping ring 8; the fixing seat 4 is provided with a fixing frame and a fixing shaft arranged on the fixing frame, the fixing shaft is clamped in the clamping ring 8 through the through opening 81, and the width of the through opening 81 is smaller than or equal to the diameter of the fixing shaft. The clamping ring 8 is clamped with the fixed shaft, so that the support 2 is arranged on the fixed seat 4, the fixed shaft needs to be pushed into the clamping ring 8 forcibly during installation, and the opening 81 is smaller than the diameter of the fixed shaft, so that the clamping ring 8 and the fixed shaft can be prevented from being separated easily.

The utility model also provides a charging device, include like foretell temperature measurement structure, measured object 3 is the terminal, support piece 21 with joint ring 8 is located respectively the both sides of terminal.

Although some specific embodiments of the present invention have been described in detail by way of example, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims

1. A temperature measurement structure is characterized in that: including temperature sensor (1), support (2), measured object (3) and fixing base (4), temperature sensor (1) sets up on support (2), and with at least part measured object (3) contact is connected, set up support piece (21) on support (2), support piece (21) with it inserts zoned (7), at least part to form the measured object between temperature sensor (1) measured object (3) with the measured object inserts zoned (7) interference fit.

2. The temperature measuring structure according to claim 1, wherein: the support (2) is provided with a groove, and the temperature sensor (1) is arranged in the groove.

3. The temperature measuring structure according to claim 2, wherein: the recess is in the orientation one side of testee (3) sets up the opening, temperature sensor (1) sets up the temperature measurement face, the temperature measurement face with the open-ended lateral surface flushes or protrusion in the open-ended lateral surface.

4. The temperature measuring structure according to claim 1, wherein: the support piece (21) and the temperature sensor (1) are respectively located on two sides of the measured object (3).

5. The temperature measuring structure according to claim 1, wherein: support (2) with set up pivot (5) on the relative one side of temperature sensor (1), set up the fixed orifices on fixing base (4), pivot (5) are inserted in the fixed orifices and are connected, support (2) temperature sensor (1) with measured object (3) are portable for fixing base (4).

6. The temperature measuring structure according to claim 1, wherein: the support (21) deforms with changes in ambient temperature.

7. The temperature measuring structure according to claim 5, wherein: the support piece (21) is made of plastic, the shaft pin (5) is made of metal, and one part of the shaft pin (5) is arranged in the support piece (21).

8. The temperature measuring structure according to claim 1, wherein: the contact surface of the support (21) and the object to be measured (3) is provided with at least one bulge (31).

9. The temperature measuring structure according to claim 1, wherein: the support (21) exerts a pressure on the contact surface of the temperature sensor (1), the pressure having a value of 0.05N-195N.

10. The temperature measuring structure according to claim 1, wherein: support piece (21) is keeping away from the one end of support sets up chamfer or radius on the edges and corners of measured object (3) one side.

11. The temperature measuring structure according to claim 5, wherein: the shaft pin (5) and the support (2) are integrally formed, the shaft pin (5) comprises a column body (51) and a cap body (52), one end of the column body (51) is connected with the support (2), the other end of the column body is connected with the cap body (52), the radial size of the cap body (52) is larger than that of the column body (51), the distance from the bottom of the cap body (52) to the support (2) is larger than or equal to the thickness of the fixing seat (4), the fixing hole comprises a positioning groove (41) and a mounting hole (42) which are communicated with each other, the diameter of the mounting hole (42) is larger than or equal to that of the cap body (52), and the width of the positioning groove (41) is larger than or equal to that of the column body (51) but smaller than that of the cap body (52).

12. The temperature measuring structure according to claim 11, wherein: the cylinder (51) is further provided with an annular bulge (53), and the annular bulge (53) can be in interference fit with the positioning groove (41).

13. The temperature measuring structure according to claim 12, wherein: the plane of the annular bulge (53) forms an included angle with the cross section of the column body (51).

14. The temperature measuring structure according to claim 5, wherein: the temperature sensor is characterized in that the shaft pin (5) and the support (2) are of a split structure, a threaded hole is formed in one side, opposite to the temperature sensor (1), of the support (2), an external thread is arranged on one side of the shaft pin (5), a nut is arranged at the end of the other side of the shaft pin (5), the shaft pin (5) penetrates through the fixing hole, and the external thread is in threaded connection with the threaded hole.

15. The temperature measuring structure according to claim 1, wherein: the bracket (2) is also provided with a clamping ring (8), the clamping ring (8) is provided with a through opening (81), and the width of the through opening (81) is smaller than the diameter of the clamping ring (8); the fixing seat (4) is provided with a fixing frame and a fixing shaft arranged on the fixing frame, the fixing shaft is connected with the clamping ring (8) in a clamping mode through the opening (81), and the width of the opening (81) is smaller than or equal to the diameter of the fixing shaft.

16. A charging device, characterized by: comprising the thermometric structure according to claim 15, said object (3) being a terminal, said support (21) and said snap ring (8) being located on either side of said terminal.