NTC (Negative Temperature Coefficient) temperature sensor for electric vehicle motor

Abstract

The invention relates to the technical field of NTC temperature sensors, and provides an NTC temperature sensor for an electric vehicle motor, the NTC temperature sensor comprises a box body and a door body, one side of the box body is provided with the door body, and the two sides of the bottom end of the box body are fixedly provided with mounting plates. The heat dissipation structure is arranged, the bottom end of the sensor body abuts against the top end of a second heat conduction plate, under the action of second heat dissipation fins, the contact area with air is increased, the second heat conduction plate transmits heat of the sensor body to the second heat dissipation fins, and under the action of an air inlet fan, the heat dissipation efficiency is improved. According to the NTC temperature sensor for the electric vehicle motor, air enters the box body through the air inlet, the air is blown to the second heat dissipation fins, and hot air is discharged from the air outlet, so that a large amount of heat is prevented from being left in the box body, heat dissipation of the sensor body is facilitated, the function of facilitating ventilation of the NTC temperature sensor is achieved, and the applicability of the NTC temperature sensor for the electric vehicle motor in use is improved.

Description

Technical Field

[0001] The invention relates to the technical field of NTC temperature sensors, and in particular to an NTC temperature sensor for an electric vehicle motor. Background Art

[0002] NTC temperature sensor is a temperature sensor made of negative temperature coefficient thermistor material, which is widely used in electric vehicle motors. Since electric vehicle motors generate a lot of heat during operation, NTC temperature sensor can monitor the temperature change of the motor in real time, so an NTC temperature sensor for electric vehicle motors is used;

[0003] To this end, the patent with announcement number CN218481183U discloses an NTC temperature sensor for electric vehicle motors, which relates to the technical field of temperature sensors, including a storage box, the left and right sides above the inner wall of the storage box are fixedly connected with guide rails, the inner walls of the two guide rails are slidably connected with guide blocks, the lower surfaces of the two guide blocks are fixedly connected with electric slide rails, the centers of the opposite side surfaces of the two electric slide rails are fixedly connected with bearings, and the opposite side surfaces of the two bearings are rotatably connected with threaded rods. The present invention can fix the sensor body through two L-shaped fixing plates, and then drive the sensor body to rise through the electric sliders in the two electric slide rails, and expose its upper end to the outside of the storage box to detect the motor temperature. It can be retracted when not in use, which protects the sensor body, avoids the influence of external factors on the sensor body, affects its measurement accuracy, and improves the working efficiency of the equipment;

[0004] Although the NTC temperature sensor for electric vehicle motors can be retracted when not in use to protect the sensor body, it is inconvenient to dissipate heat and promote air circulation during use, making it less suitable for use. Summary of the invention

[0005] The purpose of the present invention is to provide an NTC temperature sensor for electric vehicle motors to solve the defect that the existing NTC temperature sensors for electric vehicle motors are inconvenient to dissipate heat.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: an NTC temperature sensor for an electric vehicle motor, comprising a box body and a door body;

[0007] A door body is provided on one side of the box body, mounting plates are fixed on both sides of the bottom end of the box body, an air inlet is penetrated through the bottom of the box body, a heat dissipation structure is provided inside the box body above the air inlet, the heat dissipation structure comprises a fixing frame, an inlet fan, a second heat dissipation fin and a second heat conducting plate, the fixing frame is fixed to the inner wall of the box body above the air inlet, the inlet fan is installed inside the fixing frame, a second heat conducting plate is fixed on one side of the inside of the box body above the inlet fan, and second heat dissipation fins are evenly fixed on the bottom end of the second heat conducting plate;

[0008] An exhaust port is provided inside the door body, a sensor body is provided at the top of the heat dissipation structure, and a limiting structure is provided at the top of the sensor body;

[0009] A moving structure is arranged on one side of the top of the box body.

[0010] When the device is used, the heat dissipation structure is provided to realize the function of facilitating ventilation of the device, thereby improving the applicability of the NTC temperature sensor for electric vehicle motors when in use; the limited position structure is provided to realize the function of facilitating heat conduction of the device, thereby improving the comfort of the NTC temperature sensor for electric vehicle motors when in use; the mobile structure is provided to realize the function of facilitating protection of the device, thereby improving the convenience of the NTC temperature sensor for electric vehicle motors when in use.

[0011] Preferably, a dustproof net is fixed to one side of the air outlet and the bottom of the air inlet, and one end of the sensor body extends to the outside of the box body. Under the action of the dustproof net, impurities are prevented from entering the inside of the box body.

[0012] Preferably, the limiting structure includes a first heat conducting plate, a movable plate, a movable rod, a reset spring and a first heat dissipation fin, wherein the first heat conducting plate is arranged at the top of the sensor body, the first heat dissipation fin is evenly fixed to the top of the first heat conducting plate, movable rods are fixed to both sides of the top of the first heat conducting plate, the tops of the movable rods extend to the outside of the box body and are fixed with movable plates, and the outer sides of the movable rods inside the box body are sleeved with reset springs. Under the action of the reset spring, the bottom end of the first heat conducting plate is in conflict with the top of the sensor body, so as to prevent the sensor body from being displaced at the top of the second heat conducting plate.

[0013] Preferably, the movable rod and the box body form a sliding structure, and the movable rod and the first heat conducting plate form a telescopic structure through a reset spring. Under the action of the first heat dissipating fin, the contact area with the air is increased to dissipate heat from the sensor body.

[0014] Preferably, the moving structure includes an electric push rod, a moving plate, a protective shell and a guide rod, the electric push rod passes through one side of the top of the box body, a guide rod passes through the inside of the box body on one side of the electric push rod, a moving plate is fixed to one end of the electric push rod, and a protective shell is fixed to one side of the bottom of the moving plate. Under the action of the guide rod, the stability of the moving plate during movement is enhanced, and when the protective shell is sleeved on the outside of the sensor body, the sensor body is protected under the action of the protective shell.

[0015] Preferably, the protective shell is located outside one end of the sensor body, the side of the protective shell away from the movable plate is in conflict with the outer wall of the box body, the guide rod and the box body form a sliding structure, and one end of the guide rod is fixedly connected to one side of the movable plate. When the protective shell and the sensor body are separated from each other, the sensor body can monitor the temperature change of the motor.

[0016] Preferably, the top of the second heat conducting plate contacts the bottom of the sensor body, and the second heat dissipating fins are distributed at equal intervals at the bottom of the second heat conducting plate. The bottom of the sensor body contacts the top of the second heat conducting plate, and under the action of the second heat dissipating fins, the contact area with the air is increased, and the second heat conducting plate transfers the heat of the sensor body to the second heat dissipating fins. Under the action of the air intake fan, air enters the interior of the box through the air inlet, and the gas is blown toward the second heat dissipating fins, and the hot air is discharged from the exhaust port, so as to avoid a large amount of heat remaining in the interior of the box, so as to dissipate the heat of the sensor body.

[0017] The NTC temperature sensor for electric vehicle motor provided by the present invention has the following advantages:

[0018] By providing a heat dissipation structure, the bottom end of the sensor body contacts the top end of the second heat conducting plate, and under the action of the second heat dissipation fin, the contact area with the air is increased. The second heat conducting plate transfers the heat of the sensor body to the second heat dissipation fin. Under the action of the air inlet fan, air enters the interior of the box body through the air inlet, and the gas is blown to the second heat dissipation fin. The hot air is discharged from the exhaust port, avoiding a large amount of heat from remaining in the interior of the box body, so as to dissipate the heat of the sensor body, realize the function of facilitating ventilation of the device, and thus improve the applicability of the NTC temperature sensor for electric vehicle motors when in use;

[0019] By setting a limited position structure, under the action of the reset spring, the bottom end of the first heat conducting plate is in conflict with the top end of the sensor body, so as to prevent the sensor body from being displaced at the top end of the second heat conducting plate. Under the action of the first heat dissipation fin, the contact area with the air is increased to dissipate heat for the sensor body, thus realizing the function of facilitating heat conduction of the device, thereby improving the comfort of the NTC temperature sensor for electric vehicle motors when in use;

[0020] By providing a moving structure, under the action of the guide rod, the stability of the moving plate during movement is enhanced. When the protective shell is sleeved on the outside of the sensor body, the sensor body is protected under the action of the protective shell. When the protective shell and the sensor body are separated from each other, the sensor body can monitor the temperature change of the motor, realizing the function of the device to facilitate protection, thereby improving the convenience of the NTC temperature sensor for electric vehicle motors during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0022] Figure 2 It is a schematic diagram of the main cross-sectional structure of the present invention;

[0023] Figure 3 It is a schematic diagram of the cross-sectional three-dimensional structure of the present invention;

[0024] Figure 4 It is a side cross-sectional structural schematic diagram of the present invention;

[0025] Figure 5 It is a schematic diagram of the top cross-sectional structure of the present invention.

[0026] Explanation of the reference numerals in the figure: 1. box body; 2. door body; 3. mounting plate; 4. air exhaust port; 5. limiting structure; 501. first heat conduction plate; 502. movable plate; 503. movable rod; 504. reset spring; 505. first heat dissipation fin; 6. movable structure; 601. electric push rod; 602. movable plate; 603. protective shell; 604. guide rod; 7. air inlet; 8. heat dissipation structure; 801. fixed frame; 802. air inlet fan; 803. second heat dissipation fin; 804. second heat conduction plate; 9. sensor body. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] See also Figure 1-Figure 5The present invention provides an NTC temperature sensor for an electric vehicle motor, comprising a box body 1 and a door body 2, wherein the door body 2 is disposed on one side of the box body 1, mounting plates 3 are fixed on both sides of the bottom end of the box body 1, an air inlet 7 is penetrated through the bottom of the box body 1, a heat dissipation structure 8 is disposed inside the box body 1 above the air inlet 7, and the heat dissipation structure 8 comprises a fixing frame 801, an inlet fan 802, a second heat dissipation fin 803 and a second heat conducting plate 804, the fixing frame 801 is fixed on the inner wall of the box body 1 above the air inlet 7, an inlet fan 802 is installed inside the fixing frame 801, a second heat conducting plate 804 is fixed on one side of the box body 1 above the inlet fan 802, second heat dissipation fins 803 are evenly fixed to the bottom end of the second heat conducting plate 804, the top end of the second heat conducting plate 804 is in conflict with the bottom end of the sensor body 9, and the second heat dissipation fins 803 are evenly distributed at the bottom end of the second heat conducting plate 804.

[0029] Reference Figure 2 and Figure 4 As shown, the sensor body 9 is placed on the top of the second heat conducting plate 804 so that one end of the sensor body 9 extends to the inside of the protective shell 603. The second heat conducting plate 804 transfers the heat of the sensor body 9 to the second heat dissipating fins 803. Under the action of the equally spaced second heat dissipating fins 803, the contact area with the air is increased. The air inlet fan 802 is started to filter the air through the dustproof net. The filtered gas is blown to the second heat dissipating fins 803 through the air inlet 7, so that the hot air is discharged through the exhaust port 4, thereby avoiding a large amount of heat remaining in the inside of the box body 1.

[0030] An exhaust port 4 runs through the interior of the door body 2, a sensor body 9 is arranged at the top of the heat dissipation structure 8, a limiting structure 5 is arranged at the top of the sensor body 9, the limiting structure 5 comprises a first heat conducting plate 501, a movable plate 502, a movable rod 503, a reset spring 504 and a first heat dissipation fin 505, the first heat conducting plate 501 is arranged at the top of the sensor body 9, the first heat dissipation fin 505 is evenly fixed on the top of the first heat conducting plate 501, movable rods 503 are fixed on both sides of the top of the first heat conducting plate 501, the top of the movable rod 503 extends to the outside of the box body 1 and is fixed with the movable plate 502, the outer side of the movable rod 503 inside the box body 1 is sleeved with a reset spring 504, the movable rod 503 and the box body 1 form a sliding structure, the movable rod 503 and the first heat conducting plate 501 form a telescopic structure through the reset spring 504, a dustproof net is fixed on one side inside the exhaust port 4 and the bottom end inside the air inlet 7, and one end of the sensor body 9 extends to the outside of the box body 1.

[0031] Reference Figure 2 and Figure 4As shown, the first heat conducting plate 501 is moved, and the first heat conducting plate 501 drives the movable rod 503 to move inside the box body 1. When the sensor body 9 is at the top of the second heat conducting plate 804, the first heat conducting plate 501 is released. Under the elastic force of the reset spring 504, the movable rod 503 pushes the first heat conducting plate 501 to press on the top of the sensor body 9, so as to prevent the sensor body 9 from being displaced at the top of the second heat conducting plate 804. The first heat conducting plate 501 transfers the heat of the sensor body 9 to the first heat dissipating fins 505. Under the action of the first heat dissipating fins 505, the contact area with the air is increased to dissipate the heat of the sensor body 9.

[0032] A moving structure 6 is provided on one side of the top of the box body 1, and the moving structure 6 includes an electric push rod 601, a moving plate 602, a protective shell 603 and a guide rod 604. The electric push rod 601 passes through one side of the top of the box body 1, and a guide rod 604 passes through the inside of the box body 1 on one side of the electric push rod 601. The moving plate 602 is fixed to one end of the electric push rod 601, and a protective shell 603 is fixed to one side of the bottom of the moving plate 602. The protective shell 603 is located on the outside of one end of the sensor body 9, and the side of the protective shell 603 away from the moving plate 602 conflicts with the outer wall of the box body 1. The guide rod 604 and the box body 1 constitute a sliding structure, and one end of the guide rod 604 is fixedly connected to one side of the moving plate 602.

[0033] Reference Figure 3 and Figure 5 As shown, the electric push rod 601 is started, and the electric push rod 601 drives the movable plate 602 to move. The electric push rod 601 drives the guide rod 604 to move inside the box body 1. Under the guiding action of the guide rod 604, the stability of the movable plate 602 during movement is enhanced. The movable plate 602 drives the protective shell 603 to separate from the sensor body 9, so that the sensor body 9 can monitor the temperature change of the motor. When not needed, the movable plate 602 drives the protective shell 603 to be sleeved on the outside of the sensor body 9 to protect the sensor body 9.

[0034] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An NTC temperature sensor for an electric vehicle motor, comprising a box body (1) and a door body (2); Features: A door body (2) is provided on one side of the box body (1); mounting plates (3) are fixed on both sides of the bottom end of the box body (1); an air inlet (7) runs through the bottom of the box body (1); a heat dissipation structure (8) is provided inside the box body (1) above the air inlet (7); the heat dissipation structure (8) comprises a fixing frame (801), an air inlet fan (802), a second heat dissipation fin (803) and a second heat conduction plate (804); the fixing frame (801) is fixed to the inner wall of the box body (1) above the air inlet (7); an air inlet fan (802) is installed inside the fixing frame (801); a second heat conduction plate (804) is fixed on one side of the box body (1) above the air inlet fan (802); and a second heat dissipation fin (803) is evenly fixed to the bottom end of the second heat conduction plate (804); An exhaust port (4) is provided inside the door body (2); a sensor body (9) is provided at the top of the heat dissipation structure (8); and a limiting structure (5) is provided at the top of the sensor body (9); A moving structure (6) is provided on one side of the top of the box body (1).

2. The NTC temperature sensor for electric vehicle motor according to claim 1, characterized in that: A dustproof net is fixed to one side of the air outlet (4) and the bottom of the air inlet (7), and one end of the sensor body (9) extends to the outside of the box body (1).

3. The NTC temperature sensor for electric vehicle motor according to claim 1, characterized in that: The limiting structure (5) comprises a first heat conducting plate (501), a movable plate (502), a movable rod (503), a reset spring (504) and a first heat dissipation fin (505); the first heat conducting plate (501) is arranged at the top end of the sensor body (9); the first heat dissipation fin (505) is evenly fixed to the top end of the first heat conducting plate (501); movable rods (503) are fixed to both sides of the top end of the first heat conducting plate (501); the top ends of the movable rods (503) extend to the outside of the box body (1) and are fixed with the movable plate (502); and the outer sides of the movable rods (503) inside the box body (1) are sleeved with reset springs (504).

4. The NTC temperature sensor for electric vehicle motor according to claim 3, characterized in that: The movable rod (503) and the box body (1) form a sliding structure, and the movable rod (503) and the first heat conducting plate (501) form a telescopic structure via a return spring (504).

5. The NTC temperature sensor for electric vehicle motor according to claim 2, characterized in that: The moving structure (6) comprises an electric push rod (601), a moving plate (602), a protective shell (603) and a guide rod (604); the electric push rod (601) passes through one side of the top of the box body (1); a guide rod (604) passes through the inside of the box body (1) on one side of the electric push rod (601); a moving plate (602) is fixed to one end of the electric push rod (601); and a protective shell (603) is fixed to one side of the bottom of the moving plate (602).

6. The NTC temperature sensor for electric vehicle motor according to claim 5, characterized in that: The protective shell (603) is located on the outside of one end of the sensor body (9), and the side of the protective shell (603) away from the movable plate (602) is in conflict with the outer wall of the box body (1). The guide rod (604) and the box body (1) form a sliding structure, and one end of the guide rod (604) is fixedly connected to one side of the movable plate (602).

7. The NTC temperature sensor for electric vehicle motor according to claim 1, characterized in that: The top end of the second heat conducting plate (804) contacts the bottom end of the sensor body (9), and the second heat dissipation fins (803) are distributed at equal intervals at the bottom end of the second heat conducting plate (804).

Images