A motor terminal temperature measuring device

Abstract

This utility model relates to the field of motor terminal temperature monitoring technology, specifically to a motor terminal temperature measuring device, which includes a first housing, a heat-conducting connector, a thermally actuated spiral structure, a rotating shaft, and a counting component. One end of the thermally actuated spiral structure is connected to the heat-conducting connector; the rotating shaft is rotatably connected to the first housing, and one end of the rotating shaft is connected to one end of the thermally actuated spiral structure; the counting component is connected to the rotating shaft, and the counting component accumulates one count each time the rotating shaft rotates beyond a set angle. The heat-conducting connector of this utility model is used to connect to the motor terminal and transfer the heat from the motor terminal to the thermally actuated spiral structure; the thermally actuated spiral structure can drive the rotating shaft to rotate at different angles according to different temperatures; finally, the counting component calculates the number of times the rotating shaft rotates beyond a certain angle to determine the number of times the motor terminal has exceeded its temperature limit, which helps to improve the accuracy of terminal life and motor failure risk assessment, thereby improving the safety and maintainability of motor operation.

Description

Technical Field

[0001] This utility model relates to the field of motor terminal temperature monitoring technology, and more specifically, to a motor terminal temperature measuring device. Background Technology

[0002] Motors are widely used in industry, home appliances, automobiles, and other fields, making their reliability and safety crucial. As key components for current transmission, motor terminals are prone to overheating, insulation aging, metal oxidation, and even short circuits when operating under high loads or abnormal conditions (such as overload, poor contact, insufficient heat dissipation, etc.). In severe cases, this can lead to fires or equipment damage. Therefore, monitoring the temperature of motor terminals is an important means of preventing malfunctions.

[0003] Currently, temperature sensors are mainly used to measure the temperature of motor terminals during motor operation. However, traditional sensors cannot record the cumulative number of overheating incidents, making it impossible to accurately assess terminal life and failure risk. Utility Model Content

[0004] To address the problem in the prior art that sensors cannot record the cumulative number of over-temperature events, resulting in inaccurate assessments of terminal life and motor failure risks, this invention provides a motor terminal temperature measuring device that can record the cumulative number of motor terminal over-temperature events.

[0005] To solve the above problems, the technical solution adopted by this utility model is as follows:

[0006] A motor terminal temperature measuring device includes a first housing, a thermally conductive connector, a thermally actuated spiral structure, a rotating shaft, and a counting component. The thermally conductive connector is connected to the first housing. One end of the thermally actuated spiral structure is connected to the thermally conductive connector. The rotating shaft is rotatably connected to the first housing about its own axis, and one end of the rotating shaft is connected to the end of the thermally actuated spiral structure away from the thermally conductive connector. The counting component is connected to the rotating shaft, and the counting component accumulates one count each time the rotating shaft rotates beyond a set angle.

[0007] In the above technical solution, the motor terminals are connected to a heat-conducting connector. The heat from the motor terminals is transferred to the thermally actuated spiral structure through the heat-conducting connector. The radius of curvature of the thermally actuated spiral structure expands or contracts as the temperature changes, ultimately resulting in the rotation of the end of the thermally actuated spiral structure, which in turn drives the shaft to rotate. The higher the temperature, the larger the rotation angle of the shaft. When the rotation angle of the shaft reaches a certain value, the counting component accumulates one count. Workers can use the frequency of over-temperature readings to conduct more accurate safety hazard checks and preventative maintenance.

[0008] The counting component can be a mechanical counting structure or an electromechanical sensing counting structure.

[0009] Mechanical counting structures require no power supply and are relatively safe in high-temperature environments. Therefore, preferably, the counting assembly includes a second housing and a rocker arm, a reciprocating pawl, a first elastic reset member, a gear, a check pawl, and a second elastic reset member, all located inside the second housing. One end of the rocker arm is connected to the rotating shaft, and the rotating end of the reciprocating pawl is rotatably connected to the other end of the rocker arm. The gear is rotatably connected to the second housing. One end of the first elastic reset member is connected to the rocker arm or the second housing, and the other end is connected to the reciprocating pawl. The meshing end of the reciprocating pawl maintains contact with the tooth surface of the gear under the tension of the first elastic reset member. The second housing has an observation port, and one tooth surface of the gear faces the observation port. The rotating end of the check pawl is rotatably connected to the second housing. One end of the second elastic reset member is connected to the second housing, and the other end is connected to the check pawl. The meshing end of the check pawl maintains contact with the tooth surface of the gear under the tension of the second elastic reset member. Each gear tooth has a number that can be pasted or sprayed onto one of its tooth surfaces, with the numbers on adjacent teeth differing by 1. When the shaft rotates a certain angle, the rocker arm rotates, causing the reciprocating pawl to swing. The pawl's swing pushes the gear to rotate one tooth pitch, thus changing the orientation of the other tooth surface with the number towards the observation port. The operator determines the number of times the motor terminal has overheated based on the number displayed at the observation port. Meanwhile, the check pawl slips along the gear tooth surface and engages in the next tooth slot as the gear rotates. Once the motor terminal returns to normal temperature, the thermally actuated helical structure returns to its original state, the shaft rotates in the opposite direction, causing the rocker arm to reset, allowing the reciprocating pawl to re-engage in the next tooth slot, ready for the next drive. During the reciprocating pawl reset process, although the pawl applies a reverse pushing force to the gear, causing the gear to tend to rotate in the opposite direction, the check pawl, under the elastic force of the second elastic reset component, engages in the gear tooth slot, preventing the gear from rotating through geometric self-locking.

[0010] Preferably, the system further includes a temperature indicator component connected to the rotating shaft. The temperature indicator component converts the rotation angle of the shaft into temperature and displays it. Operators can determine the real-time temperature changes of the motor terminals based on the temperature displayed by the temperature indicator component, using it as one of the references to help formulate more accurate maintenance plans.

[0011] The temperature indicator component can be a mechanical temperature indicator structure, such as a dial combined with a pointer, or an electromechanical temperature indicator structure, such as an encoder combined with an electronic display.

[0012] Preferably, the temperature indicator component includes a dial and a pointer. The dial is connected to the first housing via a second housing and is located outside the first housing. The rotating shaft is rotatably connected to the dial with its own axis of rotation as the axis of rotation. The pointer is perpendicular to and connected to the rotating shaft and is located on one side of the display surface of the dial. The display surface of the dial has temperature graduations, and the pointer rotates as the rotating shaft rotates. The temperature of the motor terminal is determined based on the value indicated by the pointer. Similarly, the mechanical temperature indicator component does not require a power source and is relatively safe.

[0013] Preferably, the first housing has a first port and a second port at both ends, and the thermally conductive connector is connected to the outside of the first housing and closes the first port; the rotating shaft is rotatably connected to the second port; the second housing is connected to the outside of the first housing and closes the portion between the second port and the rotating shaft. This makes the structure of the entire temperature measuring device more compact and reasonable, which not only reduces the influence of the external ambient temperature on the thermally actuated spiral structure, but also facilitates the connection operation between the motor terminals and the thermally conductive connector, the number of overheating cycles, and the viewing of temperature readings.

[0014] Preferably, the thermally conductive connector has a covering portion at one end near the first housing, the covering portion extending into the interior of the first housing; the thermally actuated spiral structure is at least partially embedded inside the covering portion and connected to the covering portion. The covering portion can make the connection between the thermally actuated spiral structure and the thermally conductive connector more secure, and can also increase the contact area between the thermally actuated spiral structure and the thermally conductive connector, thereby improving the heat conduction efficiency.

[0015] Preferably, the device further includes a viewing cover connected to the second housing. The viewing cover and the dial together form a display cavity, and the pointer is located within the display cavity. The viewing cover isolates contaminants, prevents the pointer from jamming or the scale from becoming blurred, and also prevents the pointer from being knocked off course, ensuring the accuracy of the reading.

[0016] Preferably, both the first housing and the second housing are made of insulating materials. The insulated first and second housings prevent electric shock to personnel when touching the temperature measuring device, thereby improving operational safety.

[0017] Preferably, the heat-conducting connector has a wire insertion hole. The motor terminal can be connected to the heat-conducting connector by inserting it into the wire insertion hole, or it can pass through the wire insertion hole and be tied to the heat-conducting connector. This structure is relatively simple and allows for a quick and secure connection between the motor terminal and the heat-conducting connector.

[0018] Preferably, the thermally conductive connector is made of copper. Copper thermally conductive connectors have good thermal conductivity, allowing the actual temperature of the motor terminals to be transferred to the thermally actuated spiral structure with almost no loss or delay, resulting in high accuracy for both over-temperature counting and real-time temperature display.

[0019] The beneficial effects of this utility model are:

[0020] 1. The system includes a heat-conducting connector, a thermally actuated spiral structure, a rotating shaft, and a counting assembly. The heat-conducting connector connects to the motor terminals and transfers heat from the motor terminals to the thermally actuated spiral structure. The thermally actuated spiral structure can drive the rotating shaft to rotate at different angles depending on the temperature. Finally, the counting assembly calculates the number of times the rotating shaft's rotation angle exceeds a certain value to determine the number of times the motor terminals have overheated. This helps improve the accuracy of terminal life assessment and motor failure risk assessment, thereby improving the safety and maintainability of motor operation.

[0021] 2. The counting component adopts a mechanical counting structure, which does not require a power supply and is relatively safe to use in high-temperature environments.

[0022] 3. It is also equipped with a mechanical temperature indicator, which can display the temperature of the motor terminals in real time, so that staff can determine the real-time temperature changes of the motor terminals and thus formulate maintenance plans more accurately. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the external structure of a motor terminal temperature measuring device;

[0024] Figure 2 This is a schematic diagram of the internal structure of a motor terminal temperature measuring device.

[0025] Figure 3 This is a schematic diagram of the counting component; the arrows in the diagram indicate the direction of rotation.

[0026] Figure 4 This is a schematic diagram of the structure of the dial and hands.

[0027] In the attached figures: 1-First housing; 101-First port; 102-Second port; 2-Heat-conducting connector; 201-Wire insertion hole; 202-Covering part; 3-Thermoacting spiral structure; 4-Rotating shaft; 5-Second housing; 501-Observation port; 6-Rock arm; 7-Reciprocating pawl; 8-First elastic reset component; 9-Gear; 10-Check pawl; 11-Second elastic reset component; 12-Dial; 13-Pointer; 14-Transparent cover; 1401-Display cavity. Detailed Implementation

[0028] The accompanying drawings are for illustrative purposes only and should not be construed as limiting this patent. To better illustrate this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. The positional relationships described in the drawings are for illustrative purposes only and should not be construed as limiting this patent.

[0029] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," "right," "long," and "short" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0030] The technical solution of this utility model will be further described in detail below through specific embodiments and with reference to the accompanying drawings:

[0031] Example 1

[0032] This embodiment is a first embodiment of a motor terminal temperature measuring device, such as... Figure 1 and Figure 2 As shown, it includes a first housing 1, a heat-conducting connector 2, a thermally actuated spiral structure 3, a rotating shaft 4, and a counting assembly. The heat-conducting connector 2 is connected to the first housing 1; one end of the thermally actuated spiral structure 3 is connected to the heat-conducting connector 2; the rotating shaft 4 is rotatably connected to the first housing 1 about its own axis, and one end of the rotating shaft 4 is connected to the end of the thermally actuated spiral structure 3 away from the heat-conducting connector 2; the counting assembly is connected to the rotating shaft 4, and the counting assembly accumulates once every time the rotating shaft 4 rotates to an angle exceeding a set angle.

[0033] Specifically, the thermally actuated spiral structure 3 is made of metal.

[0034] Furthermore, the heat-conducting connector 2 is provided with a wire insertion hole 201. The motor terminal can be connected to the heat-conducting connector 2 by inserting it into the wire insertion hole 201, or it can pass through the wire insertion hole 201 and be tied to the heat-conducting connector 2. This structure is relatively simple and can facilitate a quick and secure connection between the motor terminal and the heat-conducting connector 2.

[0035] Furthermore, the thermally conductive connector 2 adopts a copper structure, meaning it is made of copper. The copper thermally conductive connector 2 has excellent thermal conductivity, allowing the actual temperature of the motor terminals to be transferred to the thermally actuated spiral structure 3 with almost no loss or delay, thus ensuring high accuracy in over-temperature counting.

[0036] The working principle or workflow of this embodiment is as follows: The motor terminal is connected to the heat-conducting connector 2. The heat from the motor terminal is transferred to the thermally actuated spiral structure 3 through the heat-conducting connector 2. The radius of curvature of the thermally actuated spiral structure 3 will expand or contract as the temperature changes, ultimately resulting in the rotation of the end of the thermally actuated spiral structure 3, which in turn drives the rotating shaft 4 to rotate. The higher the temperature, the larger the rotation angle of the rotating shaft 4. When the rotation angle of the rotating shaft 4 reaches a certain value, the counting component accumulates one count. Workers can use the frequency of overheating to conduct more accurate safety hazard inspections and preventative maintenance.

[0037] Example 2

[0038] This embodiment is a second embodiment of a motor terminal temperature measuring device. This embodiment is similar to embodiment 1, except that it combines... Figures 1 to 3As shown, the counting assembly includes a second housing 5 and a rocker arm 6, a reciprocating pawl 7, a first elastic reset member 8, a gear 9, a check pawl 10, and a second elastic reset member 11, all located inside the second housing 5. One end of the rocker arm 6 is connected to the rotating shaft 4, and the rotating end of the reciprocating pawl 7 is rotatably connected to the other end of the rocker arm 6. The gear 9 is rotatably connected to the second housing 5. One end of the first elastic reset member 8 is connected to the rocker arm 6, and the other end of the first elastic reset member 8 is connected to the reciprocating pawl 7. The meshing end of the reciprocating pawl 7 is in contact with the tooth surface of the gear 9 under the tension of the first elastic reset member 8. An observation port 501 is provided on the second housing 5, and one tooth surface of the gear 9 faces the observation port 501. The rotating end of the check pawl 10 is rotatably connected to the second housing 5, and one end of the second elastic reset member 11 is connected to the second housing 5. The other end of the second elastic reset member 11 is connected to the check pawl 10, and the meshing end of the check pawl 10 is in contact with the tooth surface of the gear 9 under the tension of the second elastic reset member 11. Numbers can be pasted or sprayed onto one of the tooth surfaces of each gear tooth, with the numbers on adjacent teeth differing by 1. When the shaft 4 rotates a certain angle, the rocker arm 6 rotates, causing the reciprocating pawl 7 to swing. The swinging of the reciprocating pawl 7 pushes the gear 9 to rotate one tooth pitch, thus changing the orientation of the other tooth surface with the number towards the observation port 501. The operator determines the number of times the motor terminal has overheated based on the number displayed on the observation port 501. Meanwhile, the check pawl 10 slips along the tooth surface of gear 9 and engages in the next tooth slot as gear 9 rotates. After the motor terminal returns to normal temperature, the thermally actuated spiral structure 3 returns to its original state, and the shaft 4 rotates in the opposite direction, causing the rocker arm 6 to reset, allowing the reciprocating pawl 7 to re-engage in the next tooth slot, ready for the next drive. During the reciprocating pawl 7 reset process, although the reciprocating pawl 7 applies a reverse pushing force to gear 9, causing gear 9 to tend to rotate in the opposite direction, the reset check pawl 10, under the elastic force of the second elastic reset member 11, engages in the tooth slot of gear 9, preventing gear 9 from rotating through geometric self-locking.

[0039] Specifically, both the first elastic reset member 8 and the second elastic reset member 11 are springs.

[0040] Other features, working principles, and beneficial effects of this embodiment are the same as those of Embodiment 1.

[0041] Example 3

[0042] This embodiment is a third embodiment of a motor terminal temperature measuring device. This embodiment is similar to embodiment 2, except that, as shown in the figure... Figure 1 , Figure 2 and Figure 4As shown, it also includes a temperature indicator component, which is connected to the rotating shaft 4. The temperature indicator component is used to convert the rotation angle of the rotating shaft 4 into temperature and display it. Operators can determine the real-time temperature changes of the motor terminals based on the temperature displayed by the temperature indicator component, using it as one of the references to help formulate more accurate maintenance plans.

[0043] Furthermore, the temperature indicator assembly includes a dial 12 and a pointer 13. The dial 12 is connected to the first housing 1 via the second housing 5, and is located outside the first housing 1. The rotating shaft 4 is rotatably connected to the dial 12 with its own axis of rotation as the axis of rotation. The pointer 13 is perpendicular to and connected to the rotating shaft 4, and is located on one side of the display surface of the dial 12. The display surface of the dial 12 has temperature scales, and the pointer 13 rotates as the rotating shaft 4 rotates. The temperature of the motor terminal is determined based on the value indicated by the pointer 13. Similarly, the mechanical temperature indicator assembly does not require a power supply and is relatively safe.

[0044] Furthermore, the first housing 1 has a first port 101 and a second port 102 at both ends, and the heat-conducting connector 2 is connected to the outside of the first housing 1 and closes the first port 101; the rotating shaft 4 is rotatably connected to the second port 102; the second housing 5 is connected to the outside of the first housing 1 and closes the portion between the second port 102 and the rotating shaft 4. This makes the structure of the entire temperature measuring device more compact and reasonable, which not only reduces the influence of the external ambient temperature on the thermally actuated spiral structure 3, but also facilitates the connection operation between the motor terminal and the heat-conducting connector 2, the number of overheating cycles, and the viewing of temperature readings.

[0045] Furthermore, the thermally conductive connector 2 has a covering portion 202 at one end near the first housing 1, and the covering portion 202 extends into the interior of the first housing 1; the thermally actuated spiral structure 3 is at least partially embedded inside the covering portion 202 and connected to the covering portion 202. The covering portion 202 can make the connection between the thermally actuated spiral structure 3 and the thermally conductive connector 2 more secure, and can also increase the contact area between the thermally actuated spiral structure 3 and the thermally conductive connector 2, thereby improving the heat conduction efficiency.

[0046] Furthermore, it also includes a viewing cover 14, which is connected to the second housing 5. The viewing cover 14 and the dial 12 together form a display cavity 1401, and the pointer 13 is located inside the display cavity 1401. The viewing cover 14 can isolate contaminants, prevent the pointer 13 from getting stuck or the scale from becoming blurred, and can also prevent the pointer 13 from being knocked off course, ensuring the accuracy of the reading.

[0047] Furthermore, both the first housing 1 and the second housing 5 are made of insulating materials. This insulation prevents electric shock to personnel when touching the temperature measuring device, thus improving operational safety.

[0048] Other features, working principles, and beneficial effects of this embodiment are the same as those of Embodiment 2.

[0049] In the specific implementation of the above embodiments, the technical features can be combined in any non-contradictory way. For the sake of brevity, not all possible combinations of the above technical features are described. However, as long as the combination of these technical features is not contradictory, it should be considered to be within the scope of this specification.

[0050] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description, and it is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A motor terminal temperature measuring device, characterized in that, The device includes a first housing (1), a thermally conductive connector (2), a thermally actuated spiral structure (3), a rotating shaft (4), and a counting component. The thermally conductive connector (2) is connected to the first housing (1). One end of the thermally actuated spiral structure (3) is connected to the thermally conductive connector (2). The rotating shaft (4) is rotatably connected to the first housing (1) with its own axis as the axis of rotation. One end of the rotating shaft (4) is connected to the end of the thermally actuated spiral structure (3) away from the thermally conductive connector (2). The counting component is connected to the rotating shaft (4). The counting component accumulates one count every time the rotating shaft (4) rotates to an angle exceeding a set angle.

2. The motor terminal temperature measuring device according to claim 1, wherein The counting assembly includes a second housing (5) and a rocker arm (6), a reciprocating pawl (7), a first elastic reset member (8), a gear (9), a check pawl (10), and a second elastic reset member (11), all located inside the second housing (5). One end of the rocker arm (6) is connected to the rotating shaft (4), and the rotating end of the reciprocating pawl (7) is rotatably connected to the other end of the rocker arm (6). The gear (9) is rotatably connected to the second housing (5). One end of the first elastic reset member (8) is connected to the rocker arm (6) or the second housing (5), and the other end of the first elastic reset member (8) is connected to the reciprocating pawl (7). The meshing end of the pawl (7) is in contact with the tooth surface of the gear (9) under the pulling force of the first elastic reset member (8); the second housing (5) is provided with an observation port (501), and one of the tooth surfaces of the gear (9) faces the observation port (501); the rotating end of the check pawl (10) is rotatably connected to the second housing (5), one end of the second elastic reset member (11) is connected to the second housing (5), and the other end of the second elastic reset member (11) is connected to the check pawl (10). The meshing end of the check pawl (10) is in contact with the tooth surface of the gear (9) under the pulling force of the second elastic reset member (11).

3. The motor terminal temperature measuring device according to claim 2, wherein It also includes a temperature indicator component, which is connected to the rotating shaft (4) and is used to convert the rotation angle of the rotating shaft (4) into temperature and display it.

4. The motor terminal temperature measuring device according to claim 3, wherein The temperature indicator component includes a dial (12) and a pointer (13). The dial (12) is connected to the first housing (1) through the second housing (5). The dial (12) is located outside the first housing (1). The rotating shaft (4) is rotatably connected to the dial (12) with its own rotating shaft as the axis of rotation. The pointer (13) is perpendicular to the rotating shaft (4) and connected to the rotating shaft (4). The pointer (13) is located on one side of the display surface of the dial (12).

5. The motor terminal temperature measuring device according to claim 4, wherein The first housing (1) has a first port (101) and a second port (102) at its two ends respectively. The heat-conducting connector (2) is connected to the outside of the first housing (1) and closes the first port (101). The rotating shaft (4) is rotatably connected to the second port (102). The second housing (5) is connected to the outside of the first housing (1) and closes the part between the second port (102) and the rotating shaft (4).

6. The motor terminal temperature measuring device according to claim 5, wherein The thermally conductive connector (2) has a covering part (202) at one end near the first housing (1), and the covering part (202) extends into the interior of the first housing (1); the thermally actuated spiral structure (3) has at least a portion embedded in the covering part (202) and connected to the covering part (202).

7. The motor terminal temperature measuring device according to claim 4, wherein It also includes a transparent cover (14), which is connected to the second housing (5). The transparent cover (14) and the dial (12) together form a display cavity (1401), and the pointer (13) is located inside the display cavity (1401).

8. The motor terminal temperature measuring device according to claim 2, wherein Both the first housing (1) and the second housing (5) are made of insulating structure.

9. The motor terminal temperature measuring device according to claim 1, wherein The heat-conducting connector (2) is provided with a wire insertion hole (201).

10. The temperature measuring device for motor terminal according to any one of claims 1 to 9, characterized in that, The thermally conductive connector (2) is made of copper.

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