A direct current motor with high efficient heat dissipation

Abstract

This utility model discloses a DC motor with high-efficiency heat dissipation, including a DC motor body. An output shaft is provided at the center of the DC motor body, and the tail of the output shaft extends to the rear end of the DC motor body. A mounting circular plate is fixedly connected to the rear end of the DC motor body. The output shaft is rotatably connected to the mounting circular plate. A driving gear is fixedly sleeved on the rear end of the output shaft. Three rotating shafts are rotatably connected to the side wall of the mounting circular plate. A driven gear is fixedly sleeved on the outer wall of each of the three rotating shafts. This utility model drives the driving gear at its tail to rotate by rotating the output shaft, thereby driving the three driven gears to rotate, and then driving the three cooling fans to rotate together, resulting in better heat dissipation. At the same time, the diameter of the driven gears is smaller than the diameter of the driving gears, which allows the speed of the cooling fans to be greater than the speed of the output shaft, thereby further improving the heat dissipation effect.

Description

Technical Field

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

[0002] Electric motors are key equipment for converting mechanical energy into electrical energy, playing an irreplaceable role in industrial production. They are widely used in industrial automation, new energy vehicles, robotics, and other fields. With the continuous development and innovation of science and technology, electric motors are gradually developing towards higher energy density, higher power density, and higher speed, high frequency, and high capacity. However, with the continuous increase in motor capacity and operating power, the temperature of various working components inside the motor rises too high. The serious insufficiency of the motor's heat dissipation efficiency can lead to problems such as the failure of internal insulation materials to withstand high temperatures and irreversible demagnetization of materials, thereby affecting the motor's working efficiency and service life, and even causing irreversible damage to the motor's safe operation. In order to keep the motor in the best working condition for a long time, the motor's heat dissipation performance is one of the decisive comprehensive consideration factors. During the operation of DC motors, heat is generated by the current passing through the stator windings. If the heat dissipation is not timely or effective, it is easy to cause the motor stator to overheat, which in turn affects the overall performance and life of the motor.

[0003] Existing motor cooling technologies mostly employ rear-end air cooling. When the motor is running, the motor shaft drives a fan to rotate, continuously drawing in cool air from the surrounding environment, passing it over the motor's heat-generating components, and then expelling the hot air, thus cooling the motor and ensuring it operates within its normal temperature range. However, this cooling method requires the fan speed to be synchronized with the motor shaft speed, and cannot be further improved. Therefore, a DC motor with highly efficient cooling is proposed. Utility Model Content

[0004] The purpose of this invention is to provide a DC motor with efficient heat dissipation to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a DC motor with efficient heat dissipation, comprising a DC motor body, an output shaft disposed at the axis of the DC motor body, the tail of the output shaft extending to the rear end of the DC motor body, a mounting circular plate fixedly connected to the rear end of the DC motor body, the output shaft being rotatably connected to the mounting circular plate, a driving gear fixedly sleeved at the rear end of the output shaft, three rotating shafts rotatably connected to the side wall of the mounting circular plate, the three rotating shafts being arranged in a circular array with the axis of the output shaft as the center, driven gears fixedly sleeved on the outer wall of each of the three rotating shafts, the three driven gears respectively meshing with the driving gear, a cooling fan fixedly connected to the end of each of the three rotating shafts, and a rear cover disposed at the rear end of the DC motor body.

[0006] As a further preferred embodiment of this technical solution, the diameter of the driven gear is smaller than the diameter of the driving gear.

[0007] As a further preferred embodiment of this technical solution, the back cover is provided with a plurality of connection holes. The back cover is fitted over the outside of the mounting circular plate. The inner diameter of the back cover is larger than the outer diameter of the mounting circular plate. Fixing screws are provided in the connection holes and are threaded into the edge sidewall of the mounting circular plate.

[0008] As a further preferred embodiment of this technical solution, the rear cover is provided with multiple vent holes.

[0009] As a further preferred embodiment of this technical solution, a plurality of positioning plates are fixedly installed on the rear side wall of the DC motor body, and the plurality of positioning plates are arranged in a ring array.

[0010] As a further preferred embodiment of this technical solution, a partition plate is provided between each two adjacent cooling fans, and the partition plate is fixedly connected to the mounting circular plate.

[0011] As a further preferred embodiment of this technical solution, a mounting plate is fixedly installed at the front end of the DC motor body, and a through hole for accommodating the output shaft is opened at the center of the mounting plate. The diameter of the through hole is larger than the outer diameter of the output shaft, and multiple fixing holes are opened at the edge of the side wall of the mounting plate.

[0012] This invention provides a DC motor with high-efficiency heat dissipation, which has the following beneficial effects:

[0013] This invention uses the rotation of the output shaft to drive the rotation of the driving gear at its tail, which in turn drives the rotation of three driven gears, which in turn drives the three cooling fans to rotate together, resulting in better heat dissipation. At the same time, the diameter of the driven gears is smaller than that of the driving gears, which allows the cooling fans to rotate at a speed greater than that of the output shaft, thereby further improving the heat dissipation effect. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0015] Figure 2 This is a schematic diagram of the overall structure of this utility model from another perspective;

[0016] Figure 3 This is a breakdown diagram of the overall structure of this utility model;

[0017] Figure 4 This is a schematic diagram of a portion of the structure of this utility model;

[0018] In the diagram: 1. DC motor body; 2. Mounting plate; 3. Rear cover; 4. Fixing hole; 5. Fixing screw; 6. Vent hole; 7. Mounting round plate; 8. Positioning plate; 9. Connecting hole; 10. Output shaft; 11. Drive gear; 12. Driven gear; 13. Rotating shaft; 14. Cooling fan; 15. Spacing plate. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0020] This utility model provides a technical solution: such as Figures 1 to 4 As shown, in this embodiment, a DC motor with high-efficiency heat dissipation includes a DC motor body 1. An output shaft 10 is provided at the axis of the DC motor body 1. The tail of the output shaft 10 extends to the rear end of the DC motor body 1. A mounting circular plate 7 is also fixedly connected to the rear end of the DC motor body 1. The output shaft 10 is rotatably connected to the mounting circular plate 7. A drive gear 11 is fixedly sleeved on the rear end of the output shaft 10. Three rotating shafts 13 are rotatably connected to the side wall of the mounting circular plate 7. The three rotating shafts 13 are arranged in a circular array with the axis of the output shaft 10 as the center. A driven gear 12 is fixedly sleeved on the outer wall of each of the three rotating shafts 13. The three driven gears 12 mesh with the drive gear 11 respectively. The diameter of the driven gear 12 is smaller than the diameter of the drive gear 11. A cooling fan 14 is fixedly connected to the end of each of the three rotating shafts 13. A rear cover 3 is also provided at the rear end of the DC motor body 1.

[0021] When in use, after the DC motor body 1 is started, the rotation of its output shaft 10 will drive the rotation of its tail drive gear 11, which in turn drives the three driven gears 12 to rotate, and then drives the three cooling fans 14 to rotate together, resulting in better heat dissipation. At the same time, the diameter of the driven gears 12 is smaller than the diameter of the drive gears 11, which allows the speed of the cooling fans 14 to be greater than the speed of the output shaft 10, thereby further improving the heat dissipation effect. The three cooling fans 14 are arranged in a ring array, which can ensure the stability of the structure and prevent the DC motor body 1 from vibrating too much due to the rotation of the cooling fans 14.

[0022] The rear cover 3 has several connecting holes 9. The rear cover 3 is fitted onto the outside of the mounting circular plate 7. The inner diameter of the rear cover 3 is larger than the outer diameter of the mounting circular plate 7. Fixing screws 5 are installed in the connecting holes 9. The fixing screws 5 are threaded into the edge side wall of the mounting circular plate 7.

[0023] The rear cover 3 has multiple air vents 6.

[0024] Among them, several positioning plates 8 are fixedly installed on the rear side wall of the DC motor body 1, and the several positioning plates 8 are arranged in a ring array.

[0025] The positioning plate 8 provides support and positioning for the inner wall of the rear cover 3. The fixing screw 5 is then passed through the connecting hole 9 of the rear cover 3 and rotated and inserted into the edge side wall of the mounting plate 7, thus fixing the rear cover 3 to the tail of the DC motor body 1. The inner diameter of the rear cover 3 is larger than the outer diameter of the mounting plate 7, resulting in a certain gap between the inner wall of the rear cover 3 and the mounting plate 7. This gap is used for airflow. When the cooling fan 14 rotates, the hot air around the DC motor body 1 enters the rear cover 3 through this gap and is discharged from the air outlet 6 on the rear cover 3, thereby achieving air convection. The rear cover 3 itself can protect the cooling fan 14 and related transmission components.

[0026] Among them, a partition plate 15 is provided between each two adjacent cooling fans 14, and the partition plate 15 is fixedly connected to the mounting circular plate 7.

[0027] The spacer 15 can separate the three cooling fans 14, preventing direct interference between the airflows generated by the three cooling fans 14.

[0028] A mounting plate 2 is fixedly installed at the front end of the DC motor body 1. A through hole for accommodating the output shaft 10 is opened at the center of the mounting plate 2. The diameter of the through hole is larger than the outer diameter of the output shaft 10. Multiple fixing holes 4 are opened at the edge of the side wall of the mounting plate 2.

[0029] The DC motor body 1 can be fixed in the installation position by using the fixing bolts and fixing holes 4.

[0030] This invention provides a DC motor with high-efficiency heat dissipation, and its specific working principle is as follows:

[0031] In use, after the DC motor body 1 starts, the rotation of its output shaft 10 drives the rotation of its tail drive gear 11, which in turn drives the three driven gears 12, which in turn drives the three cooling fans 14 to rotate together, resulting in better heat dissipation. At the same time, the diameter of the driven gears 12 is smaller than that of the drive gears 11, which allows the speed of the cooling fans 14 to be greater than the speed of the output shaft 10, thereby further improving the heat dissipation effect. The three cooling fans 14 are arranged in a ring array, which can ensure the stability of the structure and prevent excessive vibration of the DC motor body 1 caused by the rotation of the cooling fans 14. The positioning plate 8 can support the inner wall of the rear cover 3. The positioning function is achieved by passing the fixing screw 5 through the connecting hole 9 of the rear cover 3 and rotating it into the edge side wall of the mounting circular plate 7, thereby fixing the rear cover 3 to the tail of the DC motor body 1. The inner diameter of the rear cover 3 is larger than the outer diameter of the mounting circular plate 7, so that there will be a certain gap between the inner wall of the rear cover 3 and the mounting circular plate 7. This gap is used for airflow. When the cooling fan 14 rotates, the hot air around the DC motor body 1 and the cold air further away will enter the rear cover 3 through this gap and be discharged from the air outlet 6 on the rear cover 3, thereby realizing air convection. The rear cover 3 itself can protect the cooling fan 14 and related transmission components.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A DC motor with high-efficiency heat dissipation, comprising a DC motor body (1), characterized in that: An output shaft (10) is provided at the center of the DC motor body (1). The tail of the output shaft (10) extends to the rear end of the DC motor body (1). A mounting plate (7) is fixedly connected to the rear end of the DC motor body (1). The output shaft (10) is rotatably connected to the mounting plate (7). A drive gear (11) is fixedly sleeved on the rear end of the output shaft (10). Three rotating shafts (13) are rotatably connected to the side wall of the mounting plate (7). The three rotating shafts (13) are arranged in a ring array with the center of the output shaft (10) as the center. A driven gear (12) is fixedly sleeved on the outer wall of each of the three rotating shafts (13). The three driven gears (12) mesh with the drive gear (11) respectively. A cooling fan (14) is fixedly connected to the end of each of the three rotating shafts (13). A rear cover (3) is also provided at the rear end of the DC motor body (1).

2. The DC motor with high-efficiency heat dissipation according to claim 1, characterized in that: The diameter of the driven gear (12) is smaller than the diameter of the driving gear (11).

3. A DC motor with high-efficiency heat dissipation according to claim 1, characterized in that: The back cover (3) has several connecting holes (9). The back cover (3) is fitted over the outside of the mounting round plate (7). The inner diameter of the back cover (3) is larger than the outer diameter of the mounting round plate (7). The connecting holes (9) are provided with fixing screws (5). The fixing screws (5) are threaded into the edge sidewall of the mounting round plate (7).

4. A DC motor with high-efficiency heat dissipation according to claim 1, characterized in that: The rear cover (3) has multiple air vents (6).

5. A DC motor with high-efficiency heat dissipation according to claim 1, characterized in that: Several positioning plates (8) are fixedly installed on the rear side wall of the DC motor body (1), and the several positioning plates (8) are arranged in a ring array.

6. A DC motor with high-efficiency heat dissipation according to claim 1, characterized in that: A partition plate (15) is provided between each of the two adjacent cooling fans (14), and the partition plate (15) is fixedly connected to the mounting circular plate (7).

7. A DC motor with high-efficiency heat dissipation according to claim 1, characterized in that: The front end of the DC motor body (1) is fixedly mounted with a mounting plate (2). The center of the mounting plate (2) is provided with a through hole to accommodate the output shaft (10). The diameter of the through hole is larger than the outer diameter of the output shaft (10). Multiple fixing holes (4) are provided at the edge of the side wall of the mounting plate (2).

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