Motor heat dissipation structure and motor

Abstract

The utility model relates to the technical field of motor heat radiation, and provides a motor heat radiation structure and a motor. The electric drive assembly comprises a stator and a rotor, and the rotor can rotate relative to the stator. The electric drive assembly is installed in the shell, the stator is fixed to the shell, a plurality of heat dissipation ribs and a plurality of heat dissipation columns are arranged on the side, back to the stator, of the axial end face of the shell, the heat dissipation ribs and the heat dissipation columns are evenly distributed around the axis of the rotor to form a first annular heat dissipation area, and the heat dissipation ribs and the heat dissipation columns are alternately arranged. The fan blade assembly comprises an end cover and fan blades, the end cover is concentrically connected with the rotor, the end cover is provided with a plurality of ventilation holes around the axis of the rotor, the ventilation holes form a second annular heat dissipation area, the projection of the second annular heat dissipation area in the axial direction of the rotor, the second annular heat dissipation area and the first annular heat dissipation area at least partially coincide, and the fan blades are installed on the peripheral edge of the end cover. When the fan blade assembly rotates, airflow can enter the ventilation holes and make contact with the heat dissipation ribs and the heat dissipation columns for heat exchange treatment, and then the heat dissipation efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of motor heat dissipation technology, and in particular to a motor heat dissipation structure and a motor. Background Technology

[0002] Motors generate heat during operation, primarily due to winding resistance losses, core eddy current losses, and mechanical friction. If this heat cannot be dissipated in time, the motor temperature will rise.

[0003] When the stator generates excessive heat, its temperature rises. Generally, the resistance of a conductor increases with temperature because higher temperatures intensify the thermal motion of atoms within the conductor, hindering the directional movement of electrons and thus increasing resistance. According to Ohm's law I = U / R, with a constant voltage, increased resistance leads to decreased current, thereby reducing conductivity.

[0004] Excessive temperature can also degrade the performance of the insulation material of the stator winding, reduce the insulation resistance, and may cause short circuits or leakage between windings. This will change the current transmission path, and some current will not be able to pass through the stator winding according to the normal path, thereby reducing the conductivity efficiency and even causing motor failure in severe cases.

[0005] Therefore, there is an urgent need for a motor heat dissipation structure and a motor to solve the above-mentioned technical problems. Utility Model Content

[0006] The purpose of this invention is to propose a motor heat dissipation structure and motor that can improve heat dissipation efficiency.

[0007] To achieve this objective, the present invention adopts the following technical solution:

[0008] The motor heat dissipation structure includes:

[0009] An electric drive assembly includes a stator and a rotor, wherein the rotor is rotatable relative to the stator;

[0010] The housing is in which the electric drive assembly is installed. The stator is fixed to the housing. The axial end face of the housing is provided with a plurality of heat dissipation fins and a plurality of heat dissipation columns on the side opposite to the stator. The plurality of heat dissipation fins and the plurality of heat dissipation columns are evenly distributed around the axis of the rotor to form a first annular heat dissipation area. The heat dissipation fins and the heat dissipation columns are arranged alternately.

[0011] The fan blade assembly includes an end cover and fan blades. The end cover is concentrically connected to the rotor. The end cover has multiple ventilation holes around the axis of the rotor. The multiple ventilation holes form a second annular heat dissipation area. The projection of the second annular heat dissipation area onto the axial direction of the rotor at least partially overlaps with the first annular heat dissipation area. The fan blades are mounted on the peripheral edge of the end cover.

[0012] As a preferred technical solution for the above-mentioned motor heat dissipation structure, a first guide surface is provided on one side wall of the ventilation hole in a clockwise direction around the axis of the rotor, so that airflow can enter between the housing and the fan blade assembly along the first guide surface.

[0013] As a preferred technical solution for the above-mentioned motor heat dissipation structure, a second guide surface is provided on the other side wall of the ventilation hole in the counterclockwise direction around the axis of the rotor, so that airflow can enter between the housing and the fan blade assembly along the second guide surface.

[0014] As a preferred technical solution for the above-mentioned motor heat dissipation structure, a heat dissipation groove is provided on the side of the housing facing away from the electric drive assembly around the axis of the rotor.

[0015] As a preferred technical solution for the above-mentioned motor heat dissipation structure, the end cover is provided with reinforcing ribs, and there are multiple reinforcing ribs. The multiple reinforcing ribs are evenly distributed around the axis of the rotor and arranged radially.

[0016] As a preferred technical solution of the above-mentioned motor heat dissipation structure, the outer casing forms a heat dissipation boss on the axial end face of the rotor, and the axial end face of the stator abuts against the heat dissipation boss.

[0017] As a preferred technical solution for the above-mentioned motor heat dissipation structure, the first annular heat dissipation area coincides with the heat dissipation boss in the axial projection of the rotor.

[0018] As a preferred technical solution for the above-mentioned motor heat dissipation structure, the edge of the housing facing the fan blade assembly is chamfered.

[0019] As a preferred technical solution of the above-mentioned motor heat dissipation structure, the fan blade assembly further includes a frame, which is sleeved on the end cover, and the fan blade connects the frame and the end cover.

[0020] An electric motor is also provided, including the aforementioned motor heat dissipation structure.

[0021] The beneficial effects of this utility model are:

[0022] This utility model provides a motor heat dissipation structure, including an electric drive assembly, a housing, and a fan blade assembly. The electric drive assembly includes a stator and a rotor, with the rotor capable of rotating relative to the stator. The electric drive assembly is installed inside the housing, with the stator fixed to the housing. Multiple heat dissipation fins and multiple heat dissipation pillars are provided on the axial end face of the housing on the side opposite to the stator. These fins and pillars are evenly distributed around the rotor's axis, forming a first annular heat dissipation area, with the fins and pillars arranged alternately. The fan blade assembly includes an end cover and fan blades. The end cover is concentrically connected to the rotor, and multiple ventilation holes are formed around the rotor's axis, creating a second annular heat dissipation area. Projected axially onto the rotor, the second annular heat dissipation area at least partially overlaps with the first annular heat dissipation area. The fan blades are mounted on the peripheral edge of the end cover.

[0023] For example, the housing provides installation space for the electric drive assembly. The housing has a clearance hole on one end face in the axial direction. The stator in the electric drive assembly is fixed to the housing, and the rotor is inserted into the stator. The output shaft of the rotor extends out of the clearance hole and connects to the end cover of the fan blade assembly. Multiple heat dissipation pillars and heat dissipation fins are provided on the side of the housing facing away from the electric drive assembly. The heat dissipation pillars and heat dissipation fins are distributed around the axis of the rotor to form a first annular heat dissipation area, which is used to increase the contact area between the housing and the airflow. Multiple ventilation holes are provided on the end cover. The ventilation holes form a second annular heat dissipation area around the axis of the rotor. In the axial direction of the rotor, the first annular heat dissipation area and the second annular heat dissipation area at least partially overlap. In use, electrical energy is supplied to the electric drive assembly, causing the rotor to rotate relative to the stator. The rotor drives the fan blade assembly to rotate. The heat dissipation fins and heat dissipation columns are used to heat the end cover. When the fan blade assembly rotates, the airflow can enter the ventilation holes and come into contact with the heat dissipation fins and heat dissipation columns for heat exchange, thereby improving the heat dissipation efficiency. The first annular heat dissipation area and the second annular heat dissipation area at least partially overlap, which allows the airflow to flow more concentratedly to the heat dissipation fins and / or heat dissipation columns along the ventilation holes, further improving the heat dissipation efficiency. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the motor heat dissipation structure provided in an embodiment of the present invention;

[0026] Figure 2 This is a schematic diagram of the assembly of the outer shell and the stator provided in an embodiment of the present utility model;

[0027] Figure 3This is a schematic diagram of the end cap structure provided in an embodiment of the present utility model;

[0028] Figure 4 yes Figure 3 A magnified view of a portion of point A in the middle.

[0029] In the picture:

[0030] 100. Stator;

[0031] 200. Outer casing; 210. Heat dissipation fins; 220. Heat dissipation pillars; 230. Heat dissipation channels; 240. Heat dissipation boss; 250. Chamfer; 260. Clearance hole;

[0032] 300. Fan blade assembly; 310. End cover; 311. Ventilation hole; 3111. First guide surface; 3112. Second guide surface; 312. Reinforcing rib; 320. Fan blade; 330. Frame. Detailed Implementation

[0033] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0034] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0035] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0036] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0037] like Figures 1 to 4 As shown, this utility model provides a motor heat dissipation structure, including an electric drive assembly, a housing 200, and a fan blade assembly 300. The electric drive assembly includes a stator 100 and a rotor, the rotor being able to rotate relative to the stator 100. The electric drive assembly is installed inside the housing 200, the stator 100 is fixed to the housing 200, and the axial end face of the housing 200 is provided with multiple heat dissipation fins 210 and multiple heat dissipation columns 220 on the side opposite to the stator 100. The multiple heat dissipation fins 210 and multiple heat dissipation columns 220 are evenly distributed around the axis of the rotor to form a first annular heat dissipation area, and the heat dissipation fins 210 and heat dissipation columns 220 are arranged alternately. The fan blade assembly 300 includes an end cover 310 and a fan blade 320. The end cover 310 is concentrically connected to the rotor, and the end cover 310 has multiple ventilation holes 311 around the axis of the rotor. The multiple ventilation holes 311 form a second annular heat dissipation area. The projection of the second annular heat dissipation area onto the axial direction of the rotor at least partially overlaps with the first annular heat dissipation area. The fan blade 320 is installed on the peripheral edge of the end cover 310.

[0038] For example, the housing 200 provides installation space for the electric drive assembly. The housing 200 has a clearance hole 260 on one side of the axial direction. The stator 100 in the electric drive assembly is fixed to the housing 200. The rotor is inserted into the stator 100. The output shaft of the rotor extends out of the clearance hole 260 from the housing 200 and connects to the end cover 310 of the fan blade assembly 300. The side of the housing 200 facing away from the electric drive assembly is provided with a plurality of heat dissipation columns 220 and heat dissipation fins 210. The heat dissipation columns 220 and heat dissipation fins 210 are distributed around the axis of the rotor to form a first annular heat dissipation area, which is used to increase the contact area between the housing 200 and the airflow. The end cover 310 is provided with a plurality of ventilation holes 311. The ventilation holes 311 form a second annular heat dissipation area around the axis of the rotor. In the axial direction of the rotor, the first annular heat dissipation area and the second annular heat dissipation area at least partially overlap. In use, electrical energy is supplied to the electric drive assembly, causing the rotor to rotate relative to the stator 100. The rotor drives the fan blade assembly 300 to rotate. The heat dissipation fins 210 and heat dissipation columns 220 are used to heat the end cover 310. When the fan blade assembly 300 rotates, the airflow can enter the ventilation hole 311 and come into contact with the heat dissipation fins 210 and heat dissipation columns 220 for heat exchange, thereby improving the heat dissipation efficiency. The first annular heat dissipation area and the second annular heat dissipation area at least partially overlap, which allows the airflow along the ventilation hole 311 to flow more concentratedly to the heat dissipation fins 210 and / or heat dissipation columns 220, further improving the heat dissipation efficiency.

[0039] Specifically, the stator 100 includes an iron core and windings. The iron core is the main magnetic circuit of the stator 100, used to install and fix the windings of the stator 100. The windings of the stator 100 are made of insulated wire wound in a certain shape and manner, and are the circuit part of the motor. When current flows through them, a magnetic field is generated. The rotor assembly is located at the center of the stator 100 and can rotate relative to the stator 100 about its axis. The axis of the stator 100 and the axis of the rotor assembly are collinear. When the motor is started, current flows through the windings of the stator 100, generating a magnetic field according to Ampere's circuital law. This magnetic field forms a magnetic flux in the iron core. The magnetic field generated by the stator 100 interacts with the excitation magnetic field. According to Lorentz's law of force, the coils subjected to the force will generate a torque, causing a change in the magnetic field around the stator 100, which in turn drives the rotor assembly to rotate.

[0040] Optionally, a first guide surface 3111 is provided on one side wall of the ventilation hole 311 in a clockwise direction around the rotor axis, so that airflow can enter between the housing 200 and the fan blade assembly 300 along the first guide surface 3111.

[0041] Specifically, one side wall of the ventilation hole 311 is inclined. When the fan blade assembly 300 rotates, the generated airflow can enter the ventilation hole 311 along the first guide surface 3111, and then come into contact with the heat dissipation fins 210 and / or heat dissipation columns 220 on the outer casing 200 to exchange heat and accelerate the heat dissipation of the outer casing 200.

[0042] Optionally, in the counterclockwise direction around the rotor axis, the other side wall of the ventilation hole 311 is provided with a second guide surface 3112, which allows airflow to enter between the housing 200 and the fan blade assembly 300 along the second guide surface 3112.

[0043] Specifically, the other side wall of the ventilation hole 311 is inclined. When the fan blade assembly 300 rotates, the generated airflow can enter the ventilation hole 311 along the second guide surface 3112, and then come into contact with the heat dissipation fins 210 and / or heat dissipation columns 220 on the housing 200 to exchange heat and accelerate the heat dissipation of the housing 200.

[0044] Since the ventilation hole 311 is provided with a first guide surface 3111 and a second guide surface 3112, regardless of whether the fan blade assembly 300 rotates clockwise or counterclockwise, airflow can flow along the first guide surface 3111 or the second guide surface 3112 and into the ventilation hole 311 to dissipate heat for the heat dissipation fins 210 and the heat dissipation column 220.

[0045] Optionally, the housing 200 has a heat dissipation groove 230 on the side opposite to the electric drive assembly, around the rotor axis.

[0046] With this configuration, the heat dissipation slot 230 can increase the contact area between the outer casing 200 and the external environment, thereby optimizing the heat dissipation effect of the outer casing 200.

[0047] Furthermore, both the heat dissipation fins 210 and the heat dissipation pillars 220 are disposed within the heat dissipation grooves 230, thereby reducing the length of the outer casing 200 in the rotor axial direction.

[0048] Optionally, the end cover 310 is provided with reinforcing ribs 312. There are multiple reinforcing ribs 312, which are evenly distributed around the axis of the rotor and arranged radially.

[0049] Specifically, the reinforcing rib 312 is placed radially along the rotor, with one end of the reinforcing rib 312 pointing towards the clearance hole 260 of the end cover 310 for inserting the rotor's output shaft, and the other end pointing towards the edge of the end cover 310. This enhances the structural strength of the fan blade assembly 300.

[0050] Optionally, the housing 200 forms a heat dissipation boss 240 on the axial end face of the rotor, and the axial end face of the stator 100 abuts against the heat dissipation boss 240.

[0051] With this configuration, the stator 100 is in direct contact with the heat dissipation boss 240, which reduces the heat transfer process through the air and thus improves heat dissipation efficiency.

[0052] Optionally, based on the axial projection of the rotor, the first annular heat dissipation area coincides with the heat dissipation boss 240.

[0053] With this configuration, the heat at the heat dissipation protrusion 240 can be quickly dissipated using the heat dissipation fins 210 and heat dissipation columns 220 in the first annular heat dissipation zone.

[0054] Optionally, the housing 200 has a chamfer 250 on one edge facing the fan blade assembly 300.

[0055] This design allows the housing 200 to reduce the size of the insertion position to some extent through the chamfer 250. The insertion position is used to insert with the end face of the fan blade assembly 300. This facilitates the assembly of the housing 200 and the fan blade assembly 300.

[0056] Optionally, the fan blade assembly 300 may also include a frame 330, which is fitted over the end cap 310, and the fan blade 320 connects the frame 330 and the end cap 310.

[0057] With this configuration, the frame 330 can sequentially cover all the fan blades 320, preventing the fan blades 320 from forming a cantilever beam structure and reducing the sway of the fan blades 320 toward the end cover 310.

[0058] An electric motor is also provided, including the aforementioned motor heat dissipation structure.

[0059] Furthermore, the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the protection scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A motor heat dissipation structure, characterized in that, include: An electric drive assembly includes a stator (100) and a rotor, the rotor being rotatable relative to the stator (100); The housing (200) is in which the electric drive assembly is installed. The stator (100) is fixed to the housing (200). The axial end face of the housing (200) is provided with a plurality of heat dissipation fins (210) and a plurality of heat dissipation columns (220) on the side opposite to the stator (100). The plurality of heat dissipation fins (210) and the plurality of heat dissipation columns (220) are evenly distributed around the axis of the rotor to form a first annular heat dissipation area. The heat dissipation fins (210) and the heat dissipation columns (220) are arranged alternately. The fan blade assembly (300) includes an end cover (310) and a fan blade (320). The end cover (310) is concentrically connected to the rotor. The end cover (310) has a plurality of ventilation holes (311) around the axis of the rotor. The plurality of ventilation holes (311) form a second annular heat dissipation area. The projection of the second annular heat dissipation area onto the axial direction of the rotor is at least partially overlapping with the first annular heat dissipation area. The fan blade (320) is mounted on the peripheral edge of the end cover (310).

2. The motor heat dissipation structure according to claim 1, characterized in that, In a clockwise direction around the axis of the rotor, a first guide surface (3111) is provided on one side wall of the ventilation hole (311), and airflow can enter between the housing (200) and the fan blade assembly (300) along the first guide surface (3111).

3. The motor heat dissipation structure according to claim 1, characterized in that, In the counterclockwise direction around the axis of the rotor, the other side wall of the ventilation hole (311) is provided with a second guide surface (3112), and the airflow can enter between the housing (200) and the fan blade assembly (300) along the second guide surface (3112).

4. The motor heat dissipation structure according to claim 1, characterized in that, The outer casing (200) has a heat dissipation groove (230) on the side opposite to the electric drive assembly, around the axis of the rotor.

5. The motor heat dissipation structure according to claim 1, characterized in that, The end cap (310) is provided with reinforcing ribs (312), and there are multiple reinforcing ribs (312) arranged evenly and radially around the axis of the rotor.

6. The motor heat dissipation structure according to claim 1, characterized in that, The outer casing (200) forms a heat dissipation boss (240) on the axial end face of the rotor, and the axial end face of the stator (100) abuts against the heat dissipation boss (240).

7. The motor heat dissipation structure according to claim 6, characterized in that, The first annular heat dissipation area coincides with the heat dissipation boss (240) in the axial projection of the rotor.

8. The motor heat dissipation structure according to claim 1, characterized in that, The outer casing (200) has a chamfer (250) on one edge facing the fan blade assembly (300).

9. The motor heat dissipation structure according to any one of claims 1-8, characterized in that, The fan blade assembly (300) also includes a frame (330) which is fitted over the end cap (310), and the fan blade (320) connects the frame (330) and the end cap (310).

10. An electric motor, characterized in that, Includes the motor heat dissipation structure as described in any one of claims 1-9.

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