Motor end cover and motor applying same

Abstract

The application discloses a motor end cover and a motor applying the same. The motor end cover comprises an end cover body, a first heat dissipation component and a second heat dissipation component. The first heat dissipation component and the second heat dissipation component are arranged on the outer surface of the end cover body. The first heat dissipation component protrudes from the outer surface of the end cover body, and the second heat dissipation component is concave in the outer surface of the end cover body. The motor end cover is usually installed at both ends of the motor and is an indispensable component of the motor. The structure of the motor end cover is changed, the first heat dissipation component and the second heat dissipation component are arranged on the end cover body, the heat dissipation effect of the motor is enhanced, and the service life of the motor is affected due to the rapid temperature rise. In addition, the first heat dissipation component protrudes from the outer surface of the end cover body, and the second heat dissipation component is concave in the outer surface of the end cover body. The structure of one protrusion and one concave increases the heat dissipation area, and the weight of the motor is not increased, and the heat dissipation effect is further increased.

Description

Technical Field

[0001] This invention belongs to the field of motor technology and relates to a motor end cover and a motor using the same. Background Technology

[0002] An electric motor is an electromagnetic device that converts or transmits electrical energy based on the law of electromagnetic induction. Its main function is to generate driving torque and provide a power source for electrical appliances or various mechanical equipment.

[0003] Motors heat up during startup and operation. As the motor temperature rises, the bearing housing temperature increases further, reducing the lifespan of the bearing grease and consequently shortening the bearing's lifespan, thus affecting the motor's service life. Traditional methods to mitigate motor temperature rise typically address issues related to motor materials and operating procedures, but these methods all present corresponding technical challenges. For instance, improving motor materials may complicate the motor structure, while improving operating procedures may increase motor costs. Summary of the Invention

[0004] In view of this, the present invention provides a motor end cover and a motor using the same, which solves the technical problems of increased motor structure and cost caused by traditional methods of improving motor temperature.

[0005] To address the aforementioned problems, according to one aspect of this application, an embodiment of the present invention provides a motor end cover, the motor end cover including an end cover body, a first heat dissipation component, and a second heat dissipation component, the first heat dissipation component and the second heat dissipation component being disposed on the outer surface of the end cover body; and the first heat dissipation component protruding from the outer surface of the end cover body, and the second heat dissipation component being recessed into the outer surface of the end cover body.

[0006] In some embodiments, the first heat dissipation component includes a first heat dissipation fin unit, a second heat dissipation fin unit, and a third heat dissipation fin unit, and the second heat dissipation component includes a first groove, a second groove, and a third groove. Along the radial direction of the bottom surface of the end cap body, the first groove, the first heat dissipation fin unit, the second groove, the second heat dissipation fin unit, the third groove, and the third heat dissipation fin unit are distributed sequentially from the inside to the outside.

[0007] In some embodiments, the first heat dissipation fin unit includes a plurality of first heat dissipation fins, and the plurality of first heat dissipation fins are arranged on a first protrusion between the first groove and the second groove; The second heat dissipation fin unit includes a plurality of second heat dissipation fins, which are arranged on a second protrusion between the second groove and the third groove; The third heat dissipation rib unit includes multiple third heat dissipation ribs, which are arranged between the third groove and the outer edge of the end cap body.

[0008] In some embodiments, the first heat dissipation rib, the second heat dissipation rib, and the third heat dissipation rib are all cuboid structures; and along the radial direction of the end cap body, the bottom surface of the first heat dissipation rib covers the radial width of the first protrusion, and the bottom surface of the second heat dissipation rib covers the radial width of the second protrusion.

[0009] In some embodiments, the two sides of the first heat dissipation rib that are radially perpendicular to the end cap body are both arc surfaces; and / or the two sides of the second heat dissipation rib that are radially perpendicular to the end cap body are both arc surfaces; and / or of the two sides of the third heat dissipation rib that are radially perpendicular to the end cap body, the side closer to the third groove is an arc surface, and the radial cross section of the side closer to the outer edge of the end cap body is a semi-circle.

[0010] In some embodiments, the first heat dissipation fin, the second heat dissipation fin, and the third heat dissipation fin are all provided with through holes, and the inlet end and outlet end of the through holes are both opened along the circumference of the end cap body; and the area of ​​the through hole is 30%-50% of the area of ​​the corresponding first heat dissipation fin, the second heat dissipation fin, or the third heat dissipation fin.

[0011] In some embodiments, the heights of the first heat dissipation rib, the second heat dissipation rib, and the third heat dissipation rib are equal, the radial lengths of the first heat dissipation rib, the second heat dissipation rib, and the third heat dissipation rib are equal, and the radial lengths of the first groove, the second groove, and the third groove are equal; and satisfying 0.4d2≤d1≤0.6d2, d3≥d1; where d1 is the radial length of the first heat dissipation rib, d2 is the radial length of the first groove, and d3 is the height of the first heat dissipation rib.

[0012] In some embodiments, the included angle between adjacent first heat dissipation fins, adjacent second heat dissipation fins, and adjacent third heat dissipation fins is 18°-50°.

[0013] In some embodiments, the first groove, the second groove, and the third groove have the same depth and satisfy: 0.3T≤t≤0.5T; where t is the depth of the first groove and T is the minimum thickness of the bottom surface of the end cap body where the first groove is located.

[0014] In some embodiments, the motor end cap further includes a sound-absorbing component disposed on the inner surface of the end cap body.

[0015] In some embodiments, the sound-absorbing component includes a plurality of sound-absorbing cotton, which are evenly distributed on the inner sidewall of the end cap body, and the included angle between adjacent sound-absorbing cotton is 40°-72°.

[0016] In some embodiments, the radial cross-section of the sound-absorbing cotton is an isosceles trapezoid, and the base angle γ of the isosceles trapezoid near the end cap body satisfies: 110°≤γ≤150°; And / or the height H of the isosceles trapezoid satisfies: 0 < H ≤ 0.6H0, where H0 is the distance between the inner side wall of the end cap body and the outer wall of the bearing chamber.

[0017] According to another aspect of this application, an embodiment of the present invention provides an electric motor, the electric motor including the motor end cover described above.

[0018] Compared with the prior art, the motor end cover of the present invention has at least the following beneficial effects: The motor end cover provided by the present invention includes an end cover body, a first heat dissipation component and a second heat dissipation component. The first heat dissipation component and the second heat dissipation component are both disposed on the outer surface of the end cover body; and the first heat dissipation component protrudes from the outer surface of the end cover body, while the second heat dissipation component is recessed into the outer surface of the end cover body.

[0019] Motor end caps are typically installed at both ends of a motor and are an indispensable component of the motor. This invention improves the heat dissipation effect of the motor by changing the structure of the motor end cap and setting a first heat dissipation component and a second heat dissipation component on the end cap body, thereby avoiding the impact on the service life of the motor due to excessively rapid temperature rise.

[0020] In addition, in this invention, the first heat dissipation component protrudes from the outer surface of the end cover body, that is, the top of the first heat dissipation component is higher than the outer surface of the end cover body, and the second heat dissipation component is recessed into the outer surface of the end cover body, that is, the top of the second heat dissipation component is lower than the outer surface of the end cover body. This convex-concave structure increases the heat dissipation area without increasing the weight of the motor, further enhancing the heat dissipation effect.

[0021] The motor provided by this invention is designed based on the above-mentioned motor end cover, and its beneficial effects are the same as those of the above-mentioned motor end cover, which will not be repeated here.

[0022] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, the preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the structure of the motor end cover provided in an embodiment of the present invention; Figure 2 This is another structural schematic diagram of the motor end cover provided in an embodiment of the present invention; Figure 3 This is another structural schematic diagram of the motor end cover provided in an embodiment of the present invention; Figure 4 This is a front view of the interior of the motor end cover provided in an embodiment of the present invention; Figure 5 This is a front view of the exterior of the motor end cover provided in an embodiment of the present invention; Figure 6 This is a cross-sectional view of the motor end cover provided in an embodiment of the present invention; Figure 7 This is another cross-sectional view of the motor end cover provided in an embodiment of the present invention.

[0025] in: 1. End cap body; 11. Connecting ear; 12. Relief groove; 2. First heat dissipation component; 201. First heat dissipation fin unit; 202. Second heat dissipation fin unit; 203. Third heat dissipation fin unit; 2011. First heat dissipation fin; 2012. Through hole; 2021. Second heat dissipation fin; 2031. Third heat dissipation fin; 3. Second heat dissipation component; 301. First groove; 302. Second groove; 303. Third groove; 304. First protrusion; 305. Second protrusion; 4. Sound-absorbing components; 41. Sound-absorbing cotton; 5. Bearing housing; 6. Reinforcing ribs. Detailed Implementation

[0026] To further illustrate the technical means and effects adopted by the present invention to achieve the intended purpose, the specific embodiments, structures, features, and effects according to the present invention will be described in detail below with reference to the accompanying drawings and preferred embodiments. In the following description, different "an embodiment" or "an embodiment" do not necessarily refer to the same embodiment. Furthermore, specific features, structures, or characteristics in one or more embodiments can be combined in any suitable form.

[0027] In the description of this invention, it should be clearly stated that the terms "first," "second," etc., in the specification, claims, and accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence; the terms "vertical," "lateral," "longitudinal," "front," "rear," "left," "right," "up," "down," "horizontal," etc., indicate orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, and are merely for the convenience of describing this invention, and do not mean that the device or element referred to must have a specific orientation or position, and therefore should not be construed as a limitation of this invention.

[0028] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0029] Example 1 This embodiment provides a motor end cover, such as Figure 1-7 As shown, the motor end cover includes an end cover body 1, a first heat dissipation component 2, and a second heat dissipation component 3. The first heat dissipation component 2 and the second heat dissipation component 3 are both disposed on the outer surface of the end cover body 1; and the first heat dissipation component 2 protrudes from the outer surface of the end cover body 1, while the second heat dissipation component 3 is recessed into the outer surface of the end cover body 1.

[0030] Motor end covers are typically installed at both ends of the motor, located between the stator end face and the rotor end face, and are used to secure the stator windings and rotor. They protect the internal components of the motor and prevent external substances such as dust and moisture from entering the motor.

[0031] Specifically, the end cap body 1 includes a bottom surface, and an arc surface extends along the edge of the bottom surface in a direction substantially perpendicular to the bottom surface, wherein the bottom surface is a circle with a certain thickness. In this embodiment, the first heat dissipation component 2 and the second heat dissipation component 3 are both disposed on the outer surface of the bottom surface.

[0032] This embodiment improves the heat dissipation of the motor by changing the structure of the motor end cover and setting a first heat dissipation component 2 and a second heat dissipation component 3 on the end cover body 1, thereby avoiding the impact on the service life of the motor due to excessively rapid temperature rise.

[0033] In addition, in this embodiment, the first heat dissipation component 2 protrudes from the outer surface of the end cover body 1, that is, the top of the first heat dissipation component 2 is higher than the outer surface of the end cover body 1, and the second heat dissipation component 3 is recessed into the outer surface of the end cover body 1, that is, the top of the second heat dissipation component 3 is lower than the outer surface of the end cover body 1. This convex and concave structure increases the heat dissipation area without increasing the weight of the motor, and further increases the heat dissipation effect.

[0034] In a specific embodiment, the first heat dissipation component 2 includes at least one ring of heat dissipation fins, the second heat dissipation component 3 includes at least one ring of grooves, and the heat dissipation fins and the grooves are arranged at radial intervals along the end cap body 1.

[0035] Specifically, the bottom surface of the end cap body 1 is a circular structure. On the outer surface of this circular structure, at least one ring of heat dissipation fin units and at least one ring of grooves are distributed, and the heat dissipation fin units and the grooves are arranged at radial intervals along the end cap body 1. That is to say, when the first heat dissipation component 2 includes a ring of heat dissipation fin units and the second heat dissipation component 3 includes two rings of grooves, along the center of the bottom surface, there is a ring of grooves, a ring of heat dissipation fin units, a ring of grooves, and a ring of heat dissipation fin units are distributed in sequence.

[0036] In addition, to ensure the cooling effect, the heat dissipation fin units and the grooves are arranged radially at intervals along the end cover body 1, and should basically cover the entire bottom surface. That is, the outermost heat dissipation fin units should be close to the edge of the bottom surface, and the innermost grooves should be close to the bearing chamber 5 in the middle of the end cover body 1.

[0037] The heat dissipation fin unit protrudes from the outer surface of the end cover body 1, and the groove is recessed into the outer surface of the end cover body 1. In this way, the heat dissipation area is maximized, avoiding the impact on the service life of the motor due to excessive heat rise.

[0038] In addition, the specific number of coils of the heat dissipation fin unit and the groove mainly depends on the diameter of the bottom surface of the end cover body 1, and in principle, it should cover the bottom surface of the end cover body 1.

[0039] For better explanation, it is assumed that in one embodiment, the first heat dissipation component 2 includes three rings of heat dissipation fins, and the second heat dissipation component 3 includes three rings of grooves.

[0040] In a specific embodiment, such as Figure 1 and Figure 4As shown, the first heat dissipation component 2 includes a first heat dissipation fin unit 201, a second heat dissipation fin unit 202, and a third heat dissipation fin unit 203, and the second heat dissipation component 3 includes a first groove 301, a second groove 302, and a third groove 303. Along the radial direction of the bottom surface of the end cap body 1, the first groove 301, the first heat dissipation fin unit 201, the second groove 302, the second heat dissipation fin unit 202, the third groove 303, and the third heat dissipation fin unit 203 are distributed sequentially from the inside to the outside.

[0041] That is to say, along the center of the bottom surface, there are a first groove 301, a first heat dissipation fin unit 201, a second groove 302, a second heat dissipation fin unit 202, a third groove 303, and a third heat dissipation fin unit 203 distributed in sequence, that is, the grooves and heat dissipation fin units are distributed alternately in sequence.

[0042] Among the first groove 301, the second groove 302, and the third groove 303, the third groove 303 has the largest area, which can accelerate the heat dissipation of the outer ring of the end cover body 1. The second groove 302 has the second largest area, which can accelerate the heat dissipation of the middle part of the end cover body 1. The first groove 301 has the smallest heat dissipation area and is mainly used to accelerate the heat dissipation of the shaft hole ring wall and the inner ring of the end cover body 1. The first groove 301, the second groove 302, and the third groove 303 cooperate with each other to promote the heat dissipation of the motor end cover.

[0043] In the annular groove formed by the first groove 301, the second groove 302 and the third groove 303, the effective heat dissipation area is mainly divided into two parts: the bottom wall of the ring and the side wall of the ring. The reasonable combination of the two parts effectively increases the heat dissipation performance of the outer surface of the end cap.

[0044] Through formula Calculations show that, within the same time period, without the second heat dissipation component 3, the heat dissipation of the end cover body 1 is Q3 = With the addition of the third heat dissipation component, i.e., the addition of the groove, the heat dissipation of the end cover body 1 is Q4 = In comparison, the latter has improved heat dissipation efficiency. Where Q is the heat dissipation, α is the convective heat transfer coefficient, and s is the heat dissipation area. For temperature difference, s1 is the area of ​​the outer surface of the end cap, and s2 is the surface area of ​​the groove.

[0045] Therefore, by opening the first groove 301, the second groove 302 and the third groove 303 on the end cap body 1, this embodiment can significantly increase the heat dissipation area of ​​the end cap. Compared with the original end cap of the same model, the first groove 301, the second groove 302 and the third groove 303 increase the heat dissipation surface area of ​​the outer surface of the end cap by nearly half. While ensuring strength, the setting of the first groove 301, the second groove 302 and the third groove 303 can also reduce the amount of material used and the weight of the end cap, thereby reducing a certain cost.

[0046] In a specific embodiment, such as Figure 4 As shown, the first heat dissipation rib unit 201 includes a plurality of first heat dissipation ribs 2011, which are arranged on a first protrusion 304 formed between the first groove 301 and the second groove 302; the second heat dissipation rib unit 202 includes a plurality of second heat dissipation ribs 2021, which are arranged on a second protrusion 305 between the second groove 302 and the third groove 303; the third heat dissipation rib unit 203 includes a plurality of third heat dissipation ribs 2031, which are arranged between the third groove 303 and the outer edge of the end cap body 1.

[0047] In a specific embodiment, the first heat dissipation rib 2011, the second heat dissipation rib 2021, and the third heat dissipation rib 2031 are all cuboid structures; and along the radial direction of the end cap body 1, the bottom surface of the first heat dissipation rib 2011 covers the radial width of the first protrusion 304, and the bottom surface of the second heat dissipation rib 2021 covers the radial width of the second protrusion 305.

[0048] In other words, the radial direction of the end cap body 1 is covered by grooves (first groove 301, second groove 302 and third groove 303) and heat dissipation ribs (first heat dissipation rib 2011, second heat dissipation rib 2021 and third heat dissipation rib 2031). This arrangement maximizes the heat dissipation area, thereby achieving better heat dissipation effect.

[0049] In a specific embodiment, the first heat dissipation rib 2011 has two radially perpendicular sides that are both arc surfaces; and / or the second heat dissipation rib 2021 has two radially perpendicular sides that are both arc surfaces; and / or of the two radially perpendicular sides of the third heat dissipation rib 2031 and the end cover body 1, the side closer to the third groove 303 is an arc surface, and the radial cross-section of the side closer to the outer edge of the end cover body 1 is a semi-circle.

[0050] Both the arc and semi-circular designs mentioned above can increase the heat dissipation area, accelerate the heat dissipation speed, and improve the heat dissipation effect.

[0051] In a specific embodiment, such as Figure 6 As shown, the first heat dissipation fin 2011, the second heat dissipation fin 2021, and the third heat dissipation fin 2031 are all provided with through holes 2012. The inlet end and outlet end of the through hole 2012 are both opened along the circumference of the end cover body 1. The area of ​​the through hole 2012 is 30%-50% of the area of ​​the corresponding first heat dissipation fin 2011, second heat dissipation fin 2021, or third heat dissipation fin 2031.

[0052] When the area of ​​the through hole 2012 is 30%-50% of the area of ​​the corresponding first heat dissipation fin 2011, second heat dissipation fin 2021 or third heat dissipation fin 2031, heat can be quickly introduced into the air, improving heat transfer efficiency.

[0053] In a specific embodiment, the heights of the first heat dissipation rib 2011, the second heat dissipation rib 2021, and the third heat dissipation rib 2031 are equal, the radial lengths of the first heat dissipation rib 2011, the second heat dissipation rib 2021, and the third heat dissipation rib 2031 are equal, and the radial lengths of the first groove 301, the second groove 302, and the third groove 303 are equal; and satisfying: 0.4d2≤d1≤0.6d2, d3≥d1; wherein, as Figure 7 As shown, d1 is the radial length of the first heat dissipation fin 2011, d2 is the radial length of the first groove 301, and d3 is the height of the first heat dissipation fin 2011.

[0054] Specifically, when 0.4d2≤d1≤0.6d2 holds true, the ratio of the radial length of the first groove 301 to the radial length of the first heat dissipation fin 2011 is approximately 2:1. This allows for full utilization of the end cap surface area, resulting in good heat dissipation and thermal conductivity for the end cap body 1, while also ensuring the strength of the heat dissipation fin unit. When the diameter of the end cap body is fixed, if this ratio is too large, the length of the first heat dissipation fin 2011 will be too small, compromising strength and further increasing the difficulty of opening the through hole 2012, while significantly reducing its heat dissipation capacity. If this ratio is too small, the heat accumulation in the first groove 301, the second groove 302, and the third groove 303 will significantly increase, slowing down the heat dissipation effect. A compromise value is chosen to maintain the aesthetic appearance of the area.

[0055] When d3≥d1 holds true, the effective heat dissipation area of ​​the first heat dissipation fin 2011, the second heat dissipation fin 2021, and the third heat dissipation fin 2031 can be increased. When the length and width of the first heat dissipation fin 2011, the second heat dissipation fin 2021, and the third heat dissipation fin 2031 are determined, if the height of the first heat dissipation fin 2011, the second heat dissipation fin 2021, and the third heat dissipation fin 2031 is less than its length, the effective heat dissipation area of ​​the first heat dissipation fin 2011, the second heat dissipation fin 2021, and the third heat dissipation fin 2031 is reduced, and the heat dissipation capacity cannot be fully utilized; conversely, when the shape of the first heat dissipation fin 2011, the second heat dissipation fin 2021, and the third heat dissipation fin 2031 is roughly rectangular (the height is the long side), its heat conduction and heat dissipation capacity is improved, and heat can be self-conducted along the height direction, achieving a better heat dissipation effect.

[0056] In a specific embodiment, the included angle between adjacent first heat dissipation fins 2011, adjacent second heat dissipation fins 2021 and adjacent third heat dissipation fins 2031 is 18°-50°.

[0057] Similarly, through the formula Calculations show that by opening the first heat dissipation rib 2011, the second heat dissipation rib 2021, and the third heat dissipation rib 2031 on the end cover body 1, the heat dissipation area of ​​the end cover can be significantly increased. Compared with the original end cover of the same model, the first groove 301, the second groove 302, and the third groove 303 increase the heat dissipation surface area of ​​the outer surface of the end cover by nearly half. While ensuring strength, the setting of the first groove 301, the second groove 302, and the third groove 303 can also reduce the amount of material used and the weight of the end cover, thereby reducing a certain cost.

[0058] In a specific embodiment, the first groove 301, the second groove 302, and the third groove 303 have the same depth and satisfy: 0.3T≤t≤0.5T; wherein, as Figure 7 As shown, t is the depth of the first groove 301, and T is the minimum thickness of the bottom surface of the end cap body 1 where the first groove 301 is located.

[0059] The outer wall of the end cap has three annular heat dissipation grooves, namely the first groove 301, the second groove 302 and the third groove 303 mentioned above. The heat dissipation grooves can be selected according to the diameter of the end cap, and the appropriate design size, opening position and number of grooves can be selected. The groove depth t is best taken as 0.3T≤t≤0.5T, which can ensure the strength of the end cap structure and take into account the heat dissipation area of ​​the end cap surface.

[0060] In addition, to increase the heat dissipation area, toothed grooves can be formed on the groove walls of the first groove 301, the second groove 302 and the third groove 303 to further increase the heat dissipation area.

[0061] In a specific embodiment, the motor end cover further includes a sound-absorbing component 4, which is disposed on the inner surface of the end cover body 1. The sound-absorbing component 4 includes a plurality of sound-absorbing cotton 41, which are evenly distributed on the inner sidewall of the end cover body 1, and the included angle between adjacent sound-absorbing cotton 41 is 40°-72°.

[0062] In a specific embodiment, the radial cross-section of the sound-absorbing cotton 41 is an isosceles trapezoid, such as... Figure 5 As shown, the base angle γ of the isosceles trapezoid near the end cap body 1 satisfies: 110°≤γ≤150°. In this embodiment, the sound-absorbing cotton 41 is designed as an isosceles trapezoid to better reflect and absorb sound waves, fully utilize the internal space of the end cap, and the trapezoidal sides can better increase the linkage between adjacent sound-absorbing cottons to absorb and reflect sound waves. The range of values ​​for the base angle γ is to better maintain a near-parallel effect between the opposite sides of adjacent sound-absorbing cottons 41, and also to better reflect and absorb sound waves.

[0063] like Figure 5 As shown, the height H of the isosceles trapezoid satisfies: 0 < H ≤ 0.6H0, where H0 is the distance between the inner side wall of the end cap body 1 and the outer wall of the bearing chamber 5.

[0064] The height H of the isosceles trapezoid is greater than zero to ensure the presence of the sound-absorbing cotton 41 and its noise reduction effect. It is less than or equal to 0.6H0 because of the structure of the reinforcing ribs 6. Multiple reinforcing ribs 6 are radially distributed on the inner surface of the end cover body 1 to ensure the strength of the motor end cover. As shown in the figure, as the radius of the circle containing the reinforcing ribs 6 increases, the thickness (axial direction) of the reinforcing ribs 6 gradually decreases. When the length of the sound-absorbing cotton 41 is 0.5H0, the area of ​​the sound-absorbing cotton 41 blocked by the reinforcing ribs 6 along the circumferential direction increases faster in the height direction. To better utilize the sound-absorbing cotton 41's reflection and absorption area (i.e., increase the effective usable area of ​​the sound-absorbing cotton 41) without wasting material, a compromise is reached at the maximum value of 0.6H0 to better utilize the area of ​​the sound-absorbing cotton 41. Taking an engineering experience margin of 10%, the maximum value of H is 0.6H0.

[0065] The sound-absorbing cotton 41 can reflect and absorb noise waves generated inside the motor. Furthermore, the radial cross-section of the sound-absorbing cotton 41 is an isosceles trapezoid, which allows for a certain amount of sound wave reflection. When the sound wave is reflected back a second time, its intensity decreases, further enhancing the sound absorption effect of the sound-absorbing cotton 41. During the reflection process, due to its specific placement and the angle of its trapezoid, the sound-absorbing cotton 41 can mutually absorb the reflected sound waves, further reducing noise. By reflecting some energy and absorbing some energy simultaneously, it minimizes the noise received by the receiver.

[0066] In addition, in specific real-time processes, sound-absorbing cotton 41 can be used to absorb electromagnetic noise and mechanical noise, and is usually made of polyester fiber, glass fiber or other materials.

[0067] The first heat dissipation fin 2011, the second heat dissipation fin 2021, and the third heat dissipation fin 2031 are made of aluminum-clad copper composite material, balancing heat dissipation, price, and weight. Of course, materials with better thermal conductivity and more cost-effectiveness can also be selected according to actual needs.

[0068] Example 2 This embodiment provides a motor, which includes the motor end cover described in Embodiment 1.

[0069] Specifically, the motor also includes a housing. The motor end cover and the housing are positioned by a stop circle provided on the end cover body 1. The end cover body 1 is also provided with a connecting lug 11. A relief groove 12 is provided at the connection between the connecting lug 11 and the end cover body 1. The connecting lug 11 of the end cover body 1 and the housing are locked together by a screw.

[0070] The motor provided in this embodiment includes the motor end cover of Embodiment 1, causing it to have all the beneficial effects of the motor end cover of Embodiment 1.

[0071] In addition, the motor provided in this embodiment can be a permanent magnet motor, which can be used in home appliances, industrial equipment, electric vehicles and wind power generation.

[0072] In summary, it is readily understood by those skilled in the art that, without conflict, the aforementioned advantageous technical features can be freely combined and superimposed.

[0073] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any way. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. A motor end cover, characterized in that, The motor end cover includes an end cover body, a first heat dissipation component and a second heat dissipation component. The first heat dissipation component and the second heat dissipation component are both disposed on the outer surface of the end cover body. The first heat dissipation component protrudes from the outer surface of the end cover body, and the second heat dissipation component is recessed into the outer surface of the end cover body. The first heat dissipation component includes a first heat dissipation fin unit, a second heat dissipation fin unit, and a third heat dissipation fin unit. The second heat dissipation component includes a first groove, a second groove, and a third groove. Along the radial direction of the bottom surface of the end cap body, the first groove, the first heat dissipation fin unit, the second groove, the second heat dissipation fin unit, the third groove, and the third heat dissipation fin unit are distributed sequentially from the inside to the outside. The first groove, the second groove, and the third groove have the same depth and satisfy: 0.3T≤t≤0.5T; where t is the depth of the first groove and T is the minimum thickness of the bottom surface of the end cap body where the first groove is located.

2. The motor end cover according to claim 1, characterized in that, The first heat dissipation fin unit includes a plurality of first heat dissipation fins, which are arranged on a first protrusion between the first groove and the second groove; The second heat dissipation fin unit includes a plurality of second heat dissipation fins, which are arranged on a second protrusion between the second groove and the third groove; The third heat dissipation rib unit includes multiple third heat dissipation ribs, which are arranged between the third groove and the outer edge of the end cap body.

3. The motor end cover according to claim 2, characterized in that, The first heat dissipation rib, the second heat dissipation rib, and the third heat dissipation rib are all cuboid structures; and along the radial direction of the end cap body, the bottom surface of the first heat dissipation rib covers the radial width of the first protrusion, and the bottom surface of the second heat dissipation rib covers the radial width of the second protrusion.

4. The motor end cover according to claim 3, characterized in that, The first heat dissipation rib has two radially perpendicular sides that are both arc surfaces; and / or the second heat dissipation rib has two radially perpendicular sides that are both arc surfaces; and / or of the two radially perpendicular sides of the third heat dissipation rib to the end cover body, the side closer to the third groove is arc surface, and the radial cross-section of the side closer to the outer edge of the end cover body is semi-circular.

5. The motor end cover according to any one of claims 2-4, characterized in that, The first heat dissipation fin, the second heat dissipation fin, and the third heat dissipation fin are all provided with through holes, and the inlet end and outlet end of the through holes are both opened along the circumference of the end cap body; and the area of ​​the through hole is 30%-50% of the area of ​​the corresponding first heat dissipation fin, the second heat dissipation fin, or the third heat dissipation fin.

6. The motor end cover according to any one of claims 2-4, characterized in that, The first, second, and third heat dissipation ribs have equal heights, the first, second, and third heat dissipation ribs have equal radial lengths, and the first, second, and third grooves have equal radial lengths; and satisfy 0.4d2≤d1≤0.6d2, d3≥d1; where d1 is the radial length of the first heat dissipation rib, d2 is the radial length of the first groove, and d3 is the height of the first heat dissipation rib.

7. The motor end cover according to any one of claims 2-4, characterized in that, The included angle between adjacent first heat dissipation fins, adjacent second heat dissipation fins, and adjacent third heat dissipation fins is 18°-50°.

8. The motor end cover according to any one of claims 1-4, characterized in that, The motor end cover also includes a sound-absorbing component, which is disposed on the inner surface of the end cover body.

9. The motor end cover according to claim 8, characterized in that, The sound-absorbing component includes multiple sound-absorbing cottons, which are evenly distributed on the inner sidewall of the end cap body, and the included angle between adjacent sound-absorbing cottons is 40°-72°.

10. The motor end cover according to claim 9, characterized in that, The radial cross-section of the sound-absorbing cotton is an isosceles trapezoid, and the base angle γ of the isosceles trapezoid near the end cap body satisfies: 110°≤γ≤150°; And / or the height H of the isosceles trapezoid satisfies: 0 < H ≤ 0.6H0, where H0 is the distance between the inner side wall of the end cap body and the outer wall of the bearing chamber.

11. An electric motor, characterized in that, The motor includes the motor end cover as described in any one of claims 1-10.

Images