Exhaust type heat dissipation mechanism and brushless motor

Abstract

This utility model relates to the technical field of motor components and provides a suction-type heat dissipation mechanism, including a bearing seat plate with a spindle rotatably mounted at its center; a group of vent holes are also provided on the bearing seat plate; a stator assembly is sleeved on the outside of the spindle; a rotor assembly is sleeved on the outside of the stator assembly and fixedly connected to the spindle; and a suction component is fixedly mounted on one end of the spindle. The suction component is configured to generate negative pressure as the spindle rotates, thereby generating a suction airflow flowing axially along the spindle. Thus, this utility model dissipates heat by generating a suction airflow through the rotation of the suction component with the spindle, adding heat convection heat dissipation to the existing heat conduction heat dissipation, improving heat dissipation efficiency. The rotational speed of the suction component is directly proportional to the rotational speed of the spindle. The higher the spindle speed, the higher the flow rate of the suction airflow. The heat dissipation capacity can increase with the increase of rotational speed, making it suitable for high-speed rotation conditions and effectively ensuring working performance. This utility model also provides a brushless motor.

Description

Technical Field

[0001] The utility model belongs to the technical field of motor components, and in particular relates to an exhaust-type heat dissipation mechanism and a brushless motor. Background Art

[0002] Brushless motors are widely used in a variety of electrical appliances, but the large amount of heat generated by their ultra-high speed is the key to affecting the long-term stable operation of the motor. Therefore, heat dissipation performance is a prerequisite for the stable operation of the motor.

[0003] For example, the structure disclosed in Chinese patent CN210183205U has cooling holes on the housing and stator bracket, and the heat is naturally dissipated through heat conduction between the motor and the outside world. However, the heat dissipation effect of this passive heat dissipation method is limited and it is difficult to adapt to the long-term and high-speed operation conditions of the motor.

[0004] In summary, the prior art obviously has inconveniences and defects in practical use, so it is necessary to improve it. Summary of the invention

[0005] The utility model provides an exhaust type heat dissipation mechanism, aiming to solve the technical problem of poor heat dissipation effect of a motor.

[0006] In order to achieve the above-mentioned purpose, the utility model provides an exhaust type heat dissipation mechanism, comprising:

[0007] A bearing seat plate, the center of which is rotatably mounted with a core shaft; the bearing seat plate is also provided with a vent hole group;

[0008] A stator assembly is sleeved outside the core shaft;

[0009] The rotor assembly is sleeved on the outside of the stator assembly and fixedly connected to the core shaft;

[0010] A suction member, fixedly mounted on one end of the core shaft;

[0011] The suction member is configured to generate negative pressure as the core shaft rotates, thereby generating a suction airflow flowing along the axial direction of the core shaft.

[0012] According to the exhaust-type heat dissipation mechanism of the utility model, the rotor assembly includes a rotor shell, the center portion of which is fixedly connected to the core shaft; and a plurality of air holes are formed on the end surface of the rotor shell facing the suction member.

[0013] According to the exhaust-type heat dissipation mechanism of the utility model, the stator assembly includes a stator chip; a plurality of airflow channels for extracting airflow through the stator chip are formed on the stator chip.

[0014] According to the exhaust-air heat dissipation mechanism of the utility model, a magnet group is fixedly arranged on the inner wall of the rotor shell; the magnet group includes a plurality of magnet sheets uniformly arranged on the outside of the stator chip.

[0015] According to the exhaust-type heat dissipation mechanism of the utility model, the suction member includes a rotating disk, and the rotating disk is fixedly connected to the core shaft; a plurality of blades are evenly arranged on the rotating disk.

[0016] According to the exhaust-air heat dissipation mechanism of the utility model, the number of blades on the rotating disk is 6-8, and each of the blades is inclined in the same direction.

[0017] According to the exhaust-type heat dissipation mechanism of the utility model, the vent group includes a plurality of external vents evenly arranged around the center of the bearing seat plate; the external vents are fan-shaped, and the center of the fan-shaped vents coincides with the center of the bearing seat plate.

[0018] According to the exhaust-type heat dissipation mechanism of the utility model, a plurality of guide plates are arranged on the inner wall of the outer vent hole; the guide plates form an angle of no more than 10° with the axial direction of the core shaft.

[0019] According to the exhaust-air heat dissipation mechanism of the utility model, the ventilation hole group further includes a plurality of inner ventilation holes evenly arranged around the center of the bearing seat plate.

[0020] A brushless motor has the exhaust-type heat dissipation mechanism, one end of the core shaft is the output end, and the suction piece is fixedly connected to the other end of the core shaft.

[0021] The utility model provides an exhaust-type heat dissipation mechanism, in which the suction piece rotates with the core shaft to generate an exhaust airflow for heat dissipation. On the basis of the existing heat conduction type heat dissipation, heat convection heat dissipation is added to improve the heat dissipation efficiency. The rotation speed of the suction piece is proportional to the rotation speed of the core shaft. The higher the rotation speed of the core shaft, the greater the negative pressure generated by the suction piece, and the flow rate of the exhaust airflow will also increase synchronously. The heat dissipation capacity can be improved with the increase of the rotation speed, which is suitable for high-speed rotation conditions and effectively guarantees the working effect. The utility model also provides a brushless motor with the exhaust-type heat dissipation mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the exhaust-type heat dissipation mechanism of the utility model;

[0023] Figure 2 It is an exploded view of the exhaust-type heat dissipation mechanism of the utility model;

[0024] Figure 3 yes Figure 1 The main view;

[0025] Figure 4It is a front view of the bearing seat plate of the utility model;

[0026] Figure 5 yes Figure 4 Schematic diagram of the structure in the middle AA direction;

[0027] Figure 6 It is a structural schematic diagram of an embodiment of the suction piece of the utility model;

[0028] Figure 7 yes Figure 6 A schematic structural diagram of an embodiment of the middle B direction;

[0029] In the figure: 1-bearing seat plate, 11-external vent, 12-inner vent, 13-mounting hole, 14-guide plate; 2-rotor shell, 21-magnet group, 22-magnet plate fixing ring, 23-air hole; 3-core shaft, 31-output end; 4-suction piece, 41-blade; 5-stator chip. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solutions and advantages of the utility model more clearly understood, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0031] See also Figure 1 and Figure 2 The utility model provides an exhaust type heat dissipation mechanism, comprising

[0032] The bearing seat plate 1 has a core shaft 3 rotatably mounted at its center; the bearing seat plate 1 is also provided with a vent hole group;

[0033] The stator assembly is sleeved outside the core shaft 3;

[0034] The rotor assembly is sleeved outside the stator assembly and fixedly connected to the core shaft 3;

[0035] A suction member 4 is fixedly mounted on one end of the core shaft 3;

[0036] The suction member 4 is configured to: rotate with the core shaft 3 to generate negative pressure, thereby generating a suction airflow flowing along the axial direction of the core shaft 3;

[0037] Combination Figure 3 The suction member 4 of the utility model rotates to throw out the air around it, thereby generating negative pressure. The airflow flows along the axial direction of the core shaft 3 from the vent group of the bearing seat plate 1 through the stator assembly and the rotor assembly, taking away the generated heat.

[0038] The utility model generates suction airflow to dissipate heat by the suction member 4 rotating with the core shaft 3, thereby increasing heat convection heat dissipation on the basis of the existing heat conduction heat dissipation and improving the heat dissipation efficiency.

[0039] The rotation speed of the suction member 4 is proportional to the rotation speed of the core shaft 3. The higher the rotation speed of the core shaft 3, the greater the negative pressure generated by the suction member 4, and the flow rate of the exhaust air flow will also increase synchronously. The heat dissipation capacity can be improved with the increase of the rotation speed, which is suitable for high-speed rotation conditions and effectively guarantees the working effect.

[0040] As an embodiment, the rotor assembly includes a rotor shell 2, the center portion of which is fixedly connected to the core shaft 3; a plurality of air holes 23 are opened on the end surface of the rotor shell 2 facing the suction member 4; a heat exchange channel for the suction airflow is increased to improve the heat exchange efficiency.

[0041] As an embodiment, the stator assembly includes a stator chip 5; a plurality of airflow channels are formed on the stator chip 5, through which the suction airflow can flow to achieve effective heat dissipation;

[0042] A magnet group 21 is fixed on the inner wall of the rotor shell 2; the magnet group 21 includes a plurality of magnet sheets uniformly arranged on the outside of the stator core sheet 5; when current is passed through the stator core sheet 5, an induced magnetic field is generated, which drives the magnet group 21 and the rotor shell 2 to rotate, thereby driving the core shaft 3 and the suction member 4 to rotate.

[0043] Optionally, a magnetic sheet fixing ring 22 is fixed on the inner wall of the rotor shell 2; a plurality of groove teeth are protruded on the magnetic sheet fixing ring 22; a magnet sheet is fixed between two adjacent groove teeth; the magnet sheet is fixed by the groove teeth, thereby improving the rotation stability of the rotor shell 2.

[0044] See also Figure 6 As an embodiment of the suction member 4 of the utility model, the suction member 4 includes a rotating disk, which is fixedly connected to the core shaft 3; a plurality of blades 41 are evenly arranged on the rotating disk; as the rotating disk rotates, each blade 41 drives the airflow to be thrown out to the periphery, thereby generating negative pressure at the center position.

[0045] See also Figure 7 The number of blades 41 on the rotating disk is 6-8, and each of the blades 41 is inclined in the same direction to increase the centrifugal force of the ejection and increase the negative pressure strength.

[0046] See also Figure 4 As an embodiment of the vent group of the utility model, the vent group includes a plurality of outer vents 11 evenly arranged around the center of the bearing seat plate 1; the outer vents 11 are preferably fan-shaped, and the center of the fan-shaped vents coincides with the center of the bearing seat plate 1.

[0047] See also Figure 5 Furthermore, a plurality of guide plates 14 are provided on the inner wall of the outer vent hole 11; the guide plates 14 form an angle of no more than 10° with the axial direction of the core shaft 3; after the airflow is guided by the guide plates 14, a spiral airflow around the axial direction of the core shaft 3 is formed, which is wrapped around the outside of the suction airflow, making it difficult to diffuse, thereby increasing its propagation distance and effective strength, and ensuring the heat dissipation effect.

[0048] More preferably, the angle between the guide plate 14 and the core shaft 3 axially is 5-7°, so as to form a spiral airflow while reducing the obstruction of the guide plate 14 to the airflow.

[0049] Furthermore, the vent hole group further includes a plurality of inner vent holes 12 evenly arranged around the center of the bearing seat plate 1;

[0050] After the air passes through the inner vent hole 12 and the outer vent hole 11 respectively, two air flows with different distances from the core shaft 3 are formed, thereby improving the heat dissipation efficiency.

[0051] The utility model also provides a brushless motor having the exhaust-type heat dissipation mechanism; preferably, one end of the core shaft 3 is an output end 31, and the suction member 4 is fixedly connected to the other end of the core shaft 3;

[0052] The output end 31 can be connected to a device matching the brushless motor. The suction member 4 is fixedly connected to the other end of the core shaft 3. The direction of the heat-dissipating suction airflow is away from the output end 31 to avoid the hot airflow from affecting the device.

[0053] Furthermore, the bearing seat plate 1 is provided with a plurality of mounting holes 13 to facilitate the installation and fixation of the brushless motor.

[0054] In summary, the utility model provides an exhaust-type heat dissipation mechanism, in which the suction piece rotates with the core shaft to generate an exhaust airflow for heat dissipation. On the basis of the existing heat conduction heat dissipation, heat convection heat dissipation is added to improve the heat dissipation efficiency. The rotation speed of the suction piece is proportional to the rotation speed of the core shaft. The higher the rotation speed of the core shaft, the greater the negative pressure generated by the suction piece, and the flow rate of the exhaust airflow will also increase synchronously. The heat dissipation capacity can be improved with the increase of the rotation speed, which is suitable for high-speed rotation conditions and effectively guarantees the working effect. The utility model also provides a brushless motor having the above-mentioned exhaust-type heat dissipation mechanism.

[0055] Of course, the present invention may have many other embodiments. Without departing from the spirit and essence of the present invention, technicians familiar with the field can make various corresponding changes and deformations based on the present invention, but these corresponding changes and deformations should all fall within the scope of protection of the claims attached to the present invention.

Claims

1. An exhaust type heat dissipation mechanism, characterized in that: include: A bearing seat plate, the center of which is rotatably mounted with a core shaft; the bearing seat plate is also provided with a vent hole group; A stator assembly is sleeved outside the core shaft; The rotor assembly is sleeved outside the stator assembly and fixedly connected to the core shaft; A suction member, fixedly mounted on one end of the core shaft; The suction member is configured to generate negative pressure as the core shaft rotates, thereby generating a suction airflow flowing along the axial direction of the core shaft.

2. The exhaust type heat dissipation mechanism according to claim 1, characterized in that: The rotor assembly comprises a rotor shell, the center of which is fixedly connected to the core shaft; a plurality of air holes are formed on the end surface of the rotor shell facing the suction member.

3. The exhaust type heat dissipation mechanism according to claim 2, characterized in that: The stator assembly includes a stator chip; a plurality of airflow channels for sucking airflow through the stator chip are formed on the stator chip.

4. The exhaust-type heat dissipation mechanism according to claim 2, characterized in that: A magnet group is fixedly arranged on the inner wall of the rotor shell; the magnet group comprises a plurality of magnet sheets uniformly arranged on the outside of the stator chip.

5. The exhaust type heat dissipation mechanism according to claim 1, characterized in that: The suction member comprises a rotating disk, and the rotating disk is fixedly connected to the core shaft; a plurality of blades are evenly arranged on the rotating disk.

6. The exhaust-type heat dissipation mechanism according to claim 5, characterized in that: The number of blades on the rotating disk is 6-8, and each of the blades is inclined in the same direction.

7. The exhaust-type heat dissipation mechanism according to claim 1, characterized in that: The vent hole group includes a plurality of outer vent holes evenly arranged around the center of the bearing seat plate; the outer vent holes are fan-shaped, and the center of the fan-shaped vent holes coincides with the center of the bearing seat plate.

8. The exhaust-type heat dissipation mechanism according to claim 7, characterized in that: A plurality of guide plates are arranged on the inner wall of the outer vent hole; the guide plates form an angle of no more than 10° with the axial direction of the core shaft.

9. The exhaust-type heat dissipation mechanism according to claim 7, characterized in that: The ventilation hole group also includes a plurality of inner ventilation holes evenly arranged around the center of the bearing seat plate.

10. A brushless motor having an exhaust-type heat dissipation mechanism according to any one of claims 1 to 9, characterized in that: One end of the core shaft is the output end, and the suction piece is fixedly connected to the other end of the core shaft.

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