A heat dissipation device for a brushless DC motor

Abstract

The utility model provides a kind of heat sink for brushless DC motor, it is related to motor heat dissipation technical field, including DC motor main body, the rear end bolt of DC motor main body is equipped with motor rear cover, the inside of motor rear cover is provided with air cooling mechanism, the outer surface of DC motor main body is fixedly installed with self-starting heat dissipation box, the inside of self-starting heat dissipation box is provided with temperature control device.The utility model, by setting temperature control device, utilize the characteristics that expansion gas expands or shrinks with temperature change, drive lower contact plate and upper contact plate contact or separate, further control the on-off of circuit, realize the automatic start-stop of heat dissipation device.This design does not need manual intervention, effectively solve the problem that traditional fan heat dissipation needs manual opening, and the timeliness is low, can timely trigger heat dissipation in the initial stage of motor temperature rise, avoid the influence of motor performance and life due to temperature is too high, improve the intelligent degree and energy saving of heat dissipation simultaneously, reduce unnecessary energy consumption.

Description

Technical Field

[0001] This utility model relates to the field of motor heat dissipation technology, specifically to a heat dissipation device for a brushless DC motor. Background Technology

[0002] Brushless DC motors convert DC power to AC power required by the motor through a driver. During this process, the power switching transistors are constantly turned on and off. Their on-resistance and switching losses cause a large amount of heat to be generated, which is one of the main reasons for the driver's heat generation.

[0003] Currently, common heat dissipation methods include natural heat dissipation, heat sink heat dissipation, fan heat dissipation, and liquid cooling.

[0004] Fan cooling typically requires manual activation, which is difficult to implement promptly based on real-time motor temperature changes. This lack of timeliness can result in the motor not receiving effective cooling in the early stages of temperature rise, thus affecting its operational status. To address this, we propose a cooling device for brushless DC motors. Utility Model Content

[0005] This invention provides a heat dissipation device for a brushless DC motor, which solves the problem mentioned in the background art of the inability to automatically shut down the fan.

[0006] To solve the above-mentioned technical problems, the present invention provides a heat dissipation device for a brushless DC motor, including a DC motor body, a motor rear cover bolted to the rear end of the DC motor body, an air cooling mechanism inside the motor rear cover, a self-starting heat dissipation box fixedly installed on the outer surface of the DC motor body, and a temperature control device inside the self-starting heat dissipation box.

[0007] The temperature control device includes a first temperature control box, which is fixedly installed on the inner surface of the self-starting heat dissipation box. An upper contact plate is fixedly installed at the top of the inner surface of the first temperature control box, and a lower contact plate is provided below the upper contact plate. An expansion gas is provided below the lower contact plate. A power supply mechanism is provided inside the self-starting heat dissipation box.

[0008] The above technical solution enables automatic heat dissipation control of brushless DC motors. When the motor generates heat during operation, the temperature control device can automatically trigger the air-cooling mechanism to work according to temperature changes, eliminating the need for manual operation. This effectively solves the problem of low timeliness of traditional fan heat dissipation, improves the response speed and efficiency of heat dissipation, and ensures that the motor can be cooled in time in the early stages of temperature rise, maintaining its good operating condition.

[0009] Furthermore, the expanding gas is disposed inside the first temperature control box, and a gas valve is fixedly installed on the lower surface of the first temperature control box, the gas valve being connected to the first temperature control box.

[0010] Through the above technical solution, the expanding gas can expand or contract in volume with changes in motor temperature, thereby pushing the lower contact plate to contact or separate from the upper contact plate, realizing the triggering and closing of temperature control. The gas valve facilitates the replenishment or replacement of the expanding gas in the first temperature control box, ensuring the long-term stable operation of the temperature control device and guaranteeing its sensitivity and accuracy in responding to temperature changes.

[0011] Furthermore, a first wire is fixedly connected to one end of the upper contact plate, and a second wire is fixedly connected to the lower surface of the lower contact plate. One end of both the first wire and the second wire passes through the outer shell of the first temperature control box and the DC motor body and is fixedly connected to the starter.

[0012] Through the above technical solution, when the temperature rises, the expanding gas expands, pushing the lower contact plate into contact with the upper contact plate. This creates a circuit between the first and second wires, allowing an electrical signal to be transmitted to the starter, which then activates the air-cooling mechanism for heat dissipation. When the temperature drops, the expanding gas contracts, the lower and upper contact plates separate, the circuit is broken, and the air-cooling mechanism stops working. This structural design enables automatic start and stop of the heat dissipation device without manual intervention, improving the intelligence and energy efficiency of the heat dissipation process.

[0013] Furthermore, the air-cooling mechanism includes a drive motor, which is located inside the motor rear cover. A rotating column is fixedly connected to the output end of the drive motor, and a cooling fan is fixedly installed at one end of the rotating column. A support rod is fixedly installed on the outer surface of the drive motor, and uniformly distributed heat dissipation holes are opened at the rear end of the motor rear cover.

[0014] Through the above technical solution, the drive motor rotates the rotating column when it is working, which in turn causes the cooling fan to rotate, generating airflow. This airflow then dissipates heat from inside the motor through the heat dissipation holes, effectively reducing the motor temperature. The support rod provides stable support for the drive motor, ensuring its stability during operation and preventing vibration from affecting heat dissipation and normal motor operation. The even distribution of the heat dissipation holes ensures smooth airflow and improves heat dissipation efficiency.

[0015] Furthermore, the power supply mechanism includes a second temperature control box, which is fixedly installed on the surface of one side of the first temperature control box. A storage battery is fixedly installed inside the second temperature control box, and a charging socket is fixedly installed on the upper surface of the storage battery.

[0016] Through the above technical solution, the storage battery provides power to the temperature control device and the air-cooling mechanism, ensuring the normal operation of the entire heat dissipation device during motor operation. The second temperature control box protects the storage battery from damage caused by external environmental factors. The charging socket facilitates charging of the storage battery, ensuring it has sufficient power and guaranteeing the continuous operation of the heat dissipation device.

[0017] Furthermore, the charging socket passes through the second temperature control box and the self-starting heat dissipation box and extends above the self-starting heat dissipation box, and the charging socket is electrically connected to the storage battery.

[0018] The above technical solution extends the charging socket above the self-starting heat dissipation box, allowing users to charge the battery at any time and improving ease of use. The electrical connection between the charging socket and the battery ensures a smooth charging process, guaranteeing timely replenishment of the battery and preventing the heat dissipation device from malfunctioning due to insufficient power.

[0019] Furthermore, the support rod is fixedly connected to the rear cover of the motor, and the drive motor is fixedly connected to the starter.

[0020] Through the above technical solution, the fixed connection between the support rod and the motor rear cover further enhances the stability of the drive motor installation, making it less prone to shaking or displacement during high-speed operation and ensuring the stable operation of the cooling fan. The fixed connection between the drive motor and the starter ensures effective control of the drive motor by the starter, enabling timely starting and stopping of the drive motor, forming a good cooperation with the temperature control device, and improving the timeliness and accuracy of heat dissipation.

[0021] Furthermore, the storage battery is electrically connected to the upper contact plate and the lower contact plate, the upper contact plate is electrically connected to the first wire and the starter, and the lower contact plate is electrically connected to the second wire and the starter.

[0022] The above technical solution forms a complete circuit loop. The storage battery provides power to the upper and lower contact plates. When they are in contact, current is transmitted to the starter through the first and second wires, and the starter controls the drive motor to work. When they are separated, the current is interrupted, and the drive motor stops working. This circuit connection method ensures the coordinated operation of the components and realizes the function of automatic adjustment of the heat dissipation device according to the motor temperature, improving the reliability and effectiveness of heat dissipation.

[0023] The above-described solution of this utility model has at least the following beneficial effects:

[0024] 1. This utility model, by incorporating a temperature control device, utilizes the property of expanding gas expanding or contracting with temperature changes to cause the lower contact plate to contact or separate from the upper contact plate, thereby controlling the on / off state of the circuit and achieving automatic start / stop of the heat dissipation device. This design requires no manual intervention, effectively solving the problems of traditional fan cooling requiring manual activation and low timeliness. It can trigger heat dissipation in the early stages of motor temperature rise, avoiding the impact of excessive temperature on motor performance and lifespan. It also improves the intelligence and energy efficiency of heat dissipation, reducing unnecessary energy consumption.

[0025] 2. This utility model, by combining a cooling mechanism with a power supply mechanism, provides stable power support and continuous power supply for the heat dissipation process. The drive motor in the cooling mechanism rotates the cooling fan, and the generated airflow quickly dissipates heat from inside the motor through the heat dissipation holes, resulting in high heat dissipation efficiency. The support rod ensures the stability of the drive motor during operation, guaranteeing the continuous and stable function of the cooling fan. The battery in the power supply mechanism provides power to the entire heat dissipation device, and the reasonable layout of the charging socket facilitates battery charging, ensuring the continuous working capability of the heat dissipation device. This allows the motor to receive effective heat dissipation protection under various operating conditions, improving the reliability and safety of motor operation. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0027] Figure 2 This is a cross-sectional view of the present invention;

[0028] Figure 3 This is an internal schematic diagram of the self-starting heat dissipation box of this utility model;

[0029] Figure 4 This is a utility model Figure 3 The diagram on the other side.

[0030] Explanation of reference numerals in the attached figures:

[0031] 1. DC motor body; 11. Motor rear cover; 111. Heat dissipation holes; 12. Self-starting heat dissipation box;

[0032] 2. Air-cooling mechanism; 21. Drive motor; 211. Rotating column; 22. Cooling fan; 23. Support rod;

[0033] 3. Temperature control device; 31. First temperature control box; 311. Gas valve; 32. Upper contact plate; 321. First wire; 33. Lower contact plate; 331. Second wire; 34. Expansion gas; 35. Starter;

[0034] 4. Power supply mechanism; 41. Second temperature control box; 42. Storage battery; 421. Charging socket. Detailed Implementation

[0035] Exemplary embodiments of the present invention will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this invention will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[0036] like Figures 1 to 4 As shown, an embodiment of this utility model provides a heat dissipation device for a brushless DC motor, including a DC motor body 1. A motor rear cover 11 is bolted to the rear end of the DC motor body 1. A wind-cooling mechanism 2 is provided inside the motor rear cover 11. A self-starting heat dissipation box 12 is fixedly installed on the outer surface of the DC motor body 1. A temperature control device 3 is provided inside the self-starting heat dissipation box 12. The temperature control device 3 includes a first temperature control box 31, which is fixedly installed on the inner surface of the self-starting heat dissipation box 12. An upper contact plate 32 is fixedly installed at the top of the inner surface of the first temperature control box 31. A lower contact plate 33 is provided below the upper contact plate 32. An expansion gas 34 is provided below the lower contact plate 33. A power supply mechanism 4 is provided inside the self-starting heat dissipation box 12. The expansion gas 34 is located inside the first temperature control box 31. A gas valve 311 is fixedly installed on the lower surface of the first temperature control box 31 and is connected to the first temperature control box 31. One end of the upper contact plate 32 is fixedly connected to a first wire 321, and the lower surface of the lower contact plate 33 is fixedly connected to a second wire 331. One end of both the first wire 321 and the second wire 331 passes through the outer shell of the first temperature control box 31 and the DC motor body 1, and is jointly fixedly connected to a starter 35. The air-cooling mechanism 2 includes a drive motor 21, which is located inside the motor rear cover 11. The output end of the drive motor 21 is fixedly connected to a rotating column 211, and a cooling fan 22 is fixedly installed at one end of the rotating column 211. A support rod 23 is fixedly installed on the outer surface of the drive motor 21, and evenly distributed heat dissipation holes 111 are opened at the rear end of the motor rear cover 11.

[0037] In this embodiment of the invention, when the DC motor body 1 generates heat during operation, the heat is transferred to the interior of the self-starting heat dissipation box 12, causing the expansion gas 34 in the first temperature control box 31 to expand due to heat. The expanding gas pushes the lower contact plate 33 upward. When the temperature reaches the set threshold, the lower contact plate 33 contacts the upper contact plate 32, at which point the circuit is connected, and the current is transmitted to the starter 35 through the first wire 321 and the second wire 331. The starter 35 triggers the air-cooling mechanism 2 to work. The drive motor 21 drives the rotating column 211 and the cooling fan 22 to rotate, and the generated airflow dissipates the heat inside the motor through the heat dissipation holes 111, thus achieving heat dissipation. The gas valve 311 can replenish or replace the expansion gas 34 as needed to ensure the sensitivity of the temperature control device 3. The support rod 23 provides stable support for the drive motor 21, ensuring its stability during high-speed operation and ensuring the normal operation of the cooling fan 22.

[0038] like Figures 1 to 4 As shown, the power supply mechanism 4 includes a second temperature control box 41, which is fixedly installed on the surface of one side of the first temperature control box 31. A storage battery 42 is fixedly installed inside the second temperature control box 41, and a charging socket 421 is fixedly installed on the upper surface of the storage battery 42. The charging socket 421 passes through the second temperature control box 41 and the self-starting heat dissipation box 12 and extends above the self-starting heat dissipation box 12. The charging socket 421 is electrically connected to the storage battery 42. The support rod 23 is fixedly connected to the motor rear cover 11, and the drive motor 21 is fixedly connected to the starter 35. The storage battery 42 is electrically connected to the upper contact plate 32 and the lower contact plate 33. The upper contact plate 32 is electrically connected to the first wire 321 and the starter 35, and the lower contact plate 33 is electrically connected to the second wire 331 and the starter 35.

[0039] In this embodiment of the invention, the power supply mechanism 4 provides stable power to the entire heat dissipation device. The storage battery 42, through electrical connection with the upper contact plate 32 and the lower contact plate 33, supplies power to the circuit when they are in contact, ensuring that the starter 35 can normally start the drive motor 21. The charging socket 421 extends above the self-starting heat dissipation box 12, allowing users to easily charge the storage battery 42 at any time, ensuring sufficient power for the heat dissipation device to operate continuously. Simultaneously, the electrical connections between the components form a complete circuit, ensuring effective control of the air-cooling mechanism 2 by the temperature control device 3, enabling the heat dissipation device to automatically start and stop according to the motor temperature. The fixed connection between the support rod 23 and the motor rear cover 11, and the fixed connection between the drive motor 21 and the starter 35, further ensure the stability of the device structure and the reliability of its operation.

[0040] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A heat dissipating device for a brushless DC motor, characterized by comprising: The device includes a DC motor body (1), a motor rear cover (11) is bolted to the rear end of the DC motor body (1), a wind-cooling mechanism (2) is provided inside the motor rear cover (11), a self-starting heat dissipation box (12) is fixedly installed on the outer surface of the DC motor body (1), and a temperature control device (3) is provided inside the self-starting heat dissipation box (12). The temperature control device (3) includes a first temperature control box (31), which is fixedly installed on the inner surface of the self-starting heat dissipation box (12). An upper contact plate (32) is fixedly installed at the top of the inner surface of the first temperature control box (31), and a lower contact plate (33) is provided below the upper contact plate (32). An expansion gas (34) is provided below the lower contact plate (33). A power supply mechanism (4) is provided inside the self-starting heat dissipation box (12).

2. The heat sink for a brushless DC motor according to claim 1, wherein The expansion gas (34) is disposed inside the first temperature control box (31), and a gas valve (311) is fixedly installed on the lower surface of the first temperature control box (31), and the gas valve (311) is connected to the first temperature control box (31).

3. The heat sink for a brushless DC motor according to claim 1, wherein One end of the upper contact plate (32) is fixedly connected to a first wire (321), and the lower surface of the lower contact plate (33) is fixedly connected to a second wire (331). One end of the first wire (321) and the second wire (331) both pass through the outer shell of the first temperature control box (31) and the DC motor body (1) and are fixedly connected to a starter (35).

4. The heat sink for a brushless DC motor according to claim 1, wherein The air-cooling mechanism (2) includes a drive motor (21), which is located inside the motor rear cover (11). The output end of the drive motor (21) is fixedly connected to a rotating column (211), and a cooling fan (22) is fixedly installed at one end of the rotating column (211). A support rod (23) is fixedly installed on the outer surface of the drive motor (21), and the rear end of the motor rear cover (11) is provided with evenly distributed heat dissipation holes (111).

5. The heat sink for a brushless DC motor according to claim 1, wherein The power supply mechanism (4) includes a second temperature control box (41), which is fixedly installed on the surface of the first temperature control box (31). A storage battery (42) is fixedly installed inside the second temperature control box (41), and a charging socket (421) is fixedly installed on the upper surface of the storage battery (42).

6. A heat sink for a brushless DC motor as claimed in claim 5, wherein The charging socket (421) passes through the second temperature control box (41) and the self-starting heat dissipation box (12) and extends above the self-starting heat dissipation box (12). The charging socket (421) is electrically connected to the storage battery (42).

7. The heat sink for a brushless DC motor of claim 4, wherein The support rod (23) is fixedly connected to the motor rear cover (11), and the drive motor (21) is fixedly connected to the starter (35).

8. A heat dissipation device for a brushless DC motor according to claim 5, characterized in that, The storage battery (42) is electrically connected to the upper contact plate (32) and the lower contact plate (33). The upper contact plate (32) is electrically connected to the first wire (321) and the starter (35). The lower contact plate (33) is electrically connected to the second wire (331) and the starter (35).

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