Integrated drive motor

Abstract

The application provides a kind of drive integrated motor, including shell, rear end cover and rotating shaft, the tail end of rotating shaft is stretched outside the outside of rear end cover, rear end cover is connected to one end of shell, frequency converter is also provided on shell, and shell outer wall is provided with shell heat dissipation rib, the tail end of rotating shaft is provided with heat dissipation fan blade, the outside of heat dissipation fan blade is covered with wind cover, the air inlet cavity of cooling air flow is formed between wind cover and rear end cover, air inlet cavity has first flow guide hole corresponding with shell heat dissipation rib and second flow guide hole communicating with the inside of frequency converter, and the flow area of first flow guide hole is first area when the rotating speed of rotating shaft is lower than first preset value, and is second area when the rotating speed of rotating shaft is not lower than first preset value, second area is greater than first area.The effective proportion of cooling air flow introduced by heat dissipation fan blade effectively solves the difficulty of high temperature rise of frequency converter at low speed and high temperature rise of motor at high speed, and ensures the temperature rise balance of frequency converter and motor.

Description

Technical Field

[0001] This invention belongs to the field of motor design technology, and specifically relates to an integrated drive motor. Background Technology

[0002] Traditional variable frequency permanent magnet synchronous motors require a variable frequency controller to drive the motor. The variable frequency controller remotely drives and controls the motor via a power cable. This drive method occupies a large space, and the excessively long power cable can cause signal attenuation in the variable frequency controller, affecting the overall stability of the drive system.

[0003] Chinese patent CN203967911U discloses a novel structure that integrates a motor and a drive frequency converter. A chassis straddles the motor, housing the frequency converter, and the motor connects to the controller via a terminal block on the side wall of the chassis. This integrated structure reduces the overall size of the drive system, significantly improving space utilization. Furthermore, the integrated structure reduces installation costs while enhancing the overall stability of the drive system.

[0004] While integrating the motor and frequency converter into a single unit can save installation space, it results in lower heat dissipation efficiency for both the motor and the frequency converter. Traditionally, the motor and frequency converter are cooled separately using internal fan blades; however, after integration, they primarily rely on an internal fan or blower within the motor for cooling, leading to poor heat dissipation.

[0005] In related technologies, a cooling fan is installed at the tail of the motor, and corresponding ventilation openings are set around the tail of the motor and at the top of the frequency converter to guide the airflow driven by the cooling fan into the motor and the frequency converter for simultaneous heat dissipation. This achieves heat dissipation and cooling of both the motor and the frequency converter, improving the overall heat dissipation effect of the motor. However, in this related technology, the cooling fan is installed on the motor rotor shaft and rotates with the rotor. The motor has cooling fins arranged in all four directions, while the frequency converter only has cooling fins facing one side of the motor. When the motor speed is low (i.e., the rotor shaft speed is low), the cooling fan speed is also low, and the air volume provided is small. Under this condition, the heat dissipation requirement of the motor is not large, but the frequency converter has poor heat dissipation effect and significant temperature rise due to having only cooling fins on one side. Summary of the Invention

[0006] Therefore, the present invention provides an integrated drive motor that can solve the technical problem in the prior art where the cooling fan provides a small amount of air at low speeds, resulting in insufficient heat dissipation and large temperature rise in the frequency converter with only one side of the cooling fins.

[0007] To address the aforementioned problems, this invention provides an integrated drive motor, comprising a housing, a rear end cover, and a rotating shaft. The tail end of the rotating shaft extends beyond the outer side of the rear end cover, which is connected to one end of the housing. The housing also includes a frequency converter, and its outer wall is provided with heat dissipation fins.

[0008] The tail end of the rotating shaft is provided with a heat dissipation fan blade, and a fan cover is provided on the outside of the heat dissipation fan blade. An air inlet cavity for cooling airflow is formed between the fan cover and the rear end cover. The air inlet cavity has a first guide hole corresponding to the heat dissipation fins of the housing and a second guide hole communicating with the interior of the frequency converter. The flow area of ​​the first guide hole is a first area when the rotation speed of the rotating shaft is lower than a first preset value, and a second area when the rotation speed of the rotating shaft is not lower than the first preset value. The second area is larger than the first area.

[0009] In some implementations...

[0010] The first guide hole is provided with a wind valve plate. The wind valve plate can be in a first position under the impact of wind force so that the flow area of ​​the first guide hole is the second area. The wind valve plate can also be in a second position under its own weight so that the flow area of ​​the first guide hole is the first area.

[0011] In some implementations...

[0012] The air valve plate is pivotally connected to the first flow guide hole; and / or

[0013] There is a gap a between the wall of the first guide hole and the air valve plate, where 1.5mm≤a≤3mm.

[0014] In some implementations...

[0015] The housing has a cylindrical section, and the housing heat dissipation fins are arranged circumferentially around the outer side wall of the cylindrical section. The rear end cover has a disc body with the same end face size as the cylindrical section and a fan ring continuously arranged around the outer edge of the disc body. The fan ring protrudes outward along the radial direction of the disc body. There are multiple first guide holes, and the multiple first guide holes are arranged around the disc body on the fan ring. The disc body without the fan ring is a first region, and the position of the frequency converter corresponds to the position of the first region.

[0016] In some implementations...

[0017] The inner sidewall of each of the first guide holes coincides with the outer peripheral edge of the disk body, and the outer diameter of the disk body is d. Each of the first guide holes also has an outer sidewall coaxial with the disk body. The radial width between the inner sidewall and the outer sidewall is b, where 0.065d≤b≤0.12d.

[0018] In some implementations...

[0019] The fan cover includes an air inlet plate corresponding to the position of the heat dissipation fan blades. The air inlet plate has an air inlet. The outer periphery of the air inlet plate has a side connecting wall that covers the outer edge of the rear end cover. The side connecting wall has a notch at the position corresponding to the first area, and the notch forms the second guide hole.

[0020] In some implementations...

[0021] The air inlet plate has a flow guide on the side facing the rear end cover, and the flow guide is arranged around the air inlet.

[0022] In some implementations...

[0023] The frequency converter includes a housing and electrical components inside the housing. A controller heat dissipation component is connected to the electrical components. The housing heat dissipation fins corresponding to the first area are covered inside the housing, and the housing heat dissipation fins covered inside the housing are the first part of the heat dissipation fins. The controller heat dissipation component is arranged opposite to the first part of the heat dissipation fins.

[0024] In some implementations...

[0025] The controller heat dissipation component has heat dissipation fins, and each heat dissipation fin and each of the first part of the heat dissipation ribs are arranged alternately, and the heat exchange channel formed extends along the axial direction of the rotating shaft.

[0026] In some implementations...

[0027] The motor is a horizontal motor. Taking the position of the motor in use as a reference, the first area is the top area of ​​the housing. The first part of the heat dissipation fins are top heat dissipation fins. The housing heat dissipation fins also include left side heat dissipation fins, right side heat dissipation fins and bottom heat dissipation fins. Each first guide hole has a left side hole group corresponding to the position of the left side heat dissipation fin, a right side hole group corresponding to the position of the right side heat dissipation fin and a bottom hole group corresponding to the position of the bottom heat dissipation fin.

[0028] The integrated drive motor provided by this invention has the following beneficial effects:

[0029] When the motor is running, the shaft drives the cooling fan to rotate, thereby driving external cooling airflow into the air inlet cavity. The airflow is then guided through the first and second guide holes to the heat dissipation fins of the motor housing and the inside of the frequency converter, respectively, to cool the motor housing and the electrical components within the frequency converter. Since the flow area of ​​the first guide hole varies at different shaft speeds, specifically, at low motor speeds, a larger amount of cooling airflow from the air inlet cavity is introduced into the frequency converter, with a smaller portion used for cooling the motor housing, thus improving the frequency converter's heat dissipation efficiency. At high motor speeds, the driving cooling airflow of the cooling fan increases, and the flow area of ​​the first guide hole also increases accordingly, improving the cooling effect on the motor housing and increasing the motor's heat dissipation efficiency. Naturally, the increased driving airflow also simultaneously improves the heat dissipation efficiency of the frequency converter. Thus, the technical solution of this invention achieves an effective proportion of the cooling airflow introduced by the cooling fan, effectively solving the problem of increased frequency converter temperature at low speeds and increased motor temperature at high speeds, ensuring a balanced temperature rise between the frequency converter and the motor.

[0030] The air valve plate is rotatably connected to the wall of the first guide hole. The position switching of the air valve plate is achieved solely by the relationship between the force of the wind and the weight of the air valve plate itself. No other control switching mechanism is required. The structure is simple and the manufacturing cost is low.

[0031] When the air valve is in the second position, the cooling airflow flowing through the aforementioned gap can provide a certain degree of convective cooling to the motor housing, forming a dual cooling effect of natural radiation and heat dissipation for each housing heat dissipation fin. When the value of a is too small, the heat dissipation airflow of the motor housing is small at low speed, and the motor temperature rise will fluctuate greatly; when the value of a is too large, the airflow entering the frequency converter 4 is small at low speed, which reduces the heat dissipation effect on it.

[0032] By reasonably limiting the radial width b of each first guide hole, the cooling airflow is guided better. Specifically, if the b value is too small, the cooling airflow will not easily flow out of the air inlet cavity from the fan shroud 5, thus forming vortices and resulting in low airflow on the surface of the casing. If the b value is too large, the rectification and guidance effect of the first guide hole will be poor, the direction of the outflowing cooling airflow will be disordered, and the heat dissipation effect on the far end of each casing heat dissipation fin will be poor.

[0033] By staggering the heat dissipation fins and heat dissipation rods, the overall height of the frequency converter controller can be reduced, making the space more compact. Attached Figure Description

[0034] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0035] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0036] Figure 1 This is a schematic diagram of the internal structure of the integrated drive motor in an embodiment of the present invention;

[0037] Figure 2 This is a half-sectional view (perspective view) of the integrated drive motor in an embodiment of the present invention;

[0038] Figure 3 for Figure 1 Schematic diagram of the middle and rear end cover (viewed from behind along the motor axis);

[0039] Figure 4 for Figure 3 A magnified view of a section at point A in the middle;

[0040] Figure 5 for Figure 1 A three-dimensional structural diagram of the wind shield;

[0041] Figure 6 for Figure 1 Axial view of the integrated drive motor (rear view, fan cover omitted).

[0042] The reference numerals in the attached figures are as follows:

[0043] 1. Housing; 11. Housing heat dissipation fins; 2. Rear end cover; 21. First air guide hole;

[0044] 211. Air valve plate; 212. Connecting rod; 22. Second guide hole; 23. Disc body; 231. Shaft hole; 24. Fan ring; 3. Rotating shaft; 4. Frequency converter; 41. Housing; 42. Electrical components; 43. Controller heat dissipation components; 5. Heat dissipation fan blade; 51. Fan cover; 511. Air inlet plate; 512. Air inlet; 513. Side connecting wall; 514. Guide cover; 61. Front cover; 62. Motor rotor; 63. Motor stator. Detailed Implementation

[0045] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0046] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0047] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0048] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0049] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms 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, and therefore should not be construed as a limitation on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0050] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0051] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0052] See also Figures 1 to 6As shown, according to an embodiment of the present invention, a drive integrated motor is provided, including a housing 1, a rear end cover 2, and a rotating shaft 3. The tail end of the rotating shaft 3 extends out of the outer side of the rear end cover 2 (i.e., the side away from the internal space of the housing 1). The rear end cover 2 is connected to one end of the housing 1. The housing 1 is also provided with a frequency converter 4, and the outer wall of the housing 1 is provided with housing heat dissipation fins 11. Each housing heat dissipation fin 11 extends along the axial direction of the rotating shaft 3, i.e., along the front-rear direction of the motor. The tail end of the rotating shaft 3 is provided with a heat dissipation fan 5, and the outer side of the heat dissipation fan 5... The enclosure is provided with a fan cover 51, and an air inlet cavity (not labeled in the figure) is formed between the fan cover 51 and the rear end cover 2 to allow cooling airflow. The air inlet cavity has a first guide hole 21 corresponding to the heat dissipation fins 11 of the housing and a second guide hole 22 communicating with the interior of the frequency converter 4. The flow area of ​​the first guide hole 21 is a first area when the rotational speed of the shaft 3 is lower than a first preset value, and a second area when the rotational speed of the shaft 3 is not lower than the first preset value. The second area is larger than the first area. The specific selection of the aforementioned first preset value is based on actual needs.

[0053] In this technical solution, when the motor is running, the rotating shaft 3 drives the cooling fan 5 to rotate, thereby driving external cooling airflow into the air inlet cavity. The airflow is then guided through the first guide hole 21 and the second guide hole 22 to the heat dissipation fins 11 of the motor housing and the inside of the frequency converter 4, respectively, to cool the electrical components inside the motor housing 1 and the frequency converter 4. Since the flow area of ​​the first guide hole 21 varies at different rotational speeds of the rotating shaft 3, specifically, when the motor speed is low, a larger amount of cooling airflow in the air inlet cavity can be introduced into the frequency converter 4, while a smaller portion is used to cool the motor housing 1. The cooling efficiency of the frequency converter 4 is improved. When the motor speed is high, the cooling air volume driven by the cooling fan 5 increases. At this time, the flow area of ​​the first guide hole 21 also increases simultaneously, and the cooling effect of the motor housing 1 is improved, thus improving the heat dissipation efficiency of the motor. Of course, at this time, due to the increase in driving air volume, the heat dissipation efficiency of the frequency converter 4 is also improved simultaneously. Thus, the technical solution of the present invention achieves an effective ratio of cooling airflow introduced by the cooling fan 5, effectively solving the problem of temperature rise of the frequency converter 4 at low speed and temperature rise of the motor at high speed, and ensuring that the temperature rise of the frequency converter 4 and the motor is balanced.

[0054] In some feasible embodiments, a corresponding opening and closing mechanism can be provided at the first guide hole 21 to realize the opening and closing of the corresponding first guide hole 21 and the adjustment of the flow area. In a preferred embodiment, see [details omitted]. Figure 3As shown, a damper plate 211 is provided inside the first guide hole 21. The damper plate 211 can be in a first position under the impact of wind force, so that the flow area of ​​the first guide hole 21 is the second area. The damper plate 211 can also be in a second position under its own weight, so that the flow area of ​​the first guide hole 21 is the first area. It can be understood that the aforementioned first position is the position where the damper plate 211 is open, and the second position is the position where the damper plate 211 is closed. In a specific embodiment, a connecting rod 212 is provided at each end of the damper plate 211. The connecting rod 212 is inserted into the groove between the connecting rod and the wall of the first guide hole 21, thereby realizing the rotatable connection between the damper plate 211 and the first guide hole 21, that is, the damper plate 211 and the first guide hole 21 are pivotally connected, and the structure is particularly simple.

[0055] In this technical solution, the air valve plate 211 is rotatably connected to the wall of the first guide hole 21. The position switching of the air valve plate 211 is achieved solely by the force of the wind and the relative weight of the air valve plate 211. No other control switching mechanism is required, resulting in a simple structure and low manufacturing cost. It is understandable that when the rotational speed of the shaft 3 is high, the cooling airflow is large, and the force it can exert on the air valve 211 is also relatively large. The air valve 211 is in the first position, and the higher the rotational speed, the greater the airflow. The opening of the air valve 211 in the first position is also larger. At this time, more cooling airflow is guided to the heat dissipation fins 11 of the housing, which matches the heat dissipation requirements of the housing under this condition. When the rotational speed is low, the cooling airflow is also relatively small, and the force it exerts on the air valve 211 cannot overcome its own weight. The air valve 211 is in the second position. At this time, the cooling airflow mainly enters the frequency converter 4 through the second guide hole 22 to achieve cooling and heat dissipation. At the same time, since the motor speed is low, the heat dissipation requirements of the housing 1 are not too great, and it can rely on the natural cooling of the heat dissipation fins 11 of the housing.

[0056] See also Figure 4 As shown, in some embodiments, there is a gap a between the wall of the first guide hole 21 and the air valve plate 211, where 1.5mm≤a≤3mm. That is, when the air valve plate 211 is in the second position, the cooling airflow flowing through the aforementioned gap can perform a certain degree of convective cooling on the motor housing 1, forming a dual cooling effect of natural radiation heat dissipation on each housing heat dissipation fin 11. When the value of a is too small, the heat dissipation airflow of the motor housing is small at low speed, and the motor temperature rise will fluctuate greatly. When the value of a is too large, the airflow entering the frequency converter 4 is small at low speed, which reduces the heat dissipation effect on it.

[0057] In some embodiments, the housing 1 has a cylindrical section, which can also be a single cylindrical structure. The housing heat dissipation fins 11 are arranged circumferentially around the housing 1 on the outer wall of the cylindrical section. The rear end cover 2 has a disc 23 with the same end face size as the cylindrical section and a fan ring 24 continuously arranged around the outer edge of the disc 23. The fan ring 24 protrudes outward along the radial direction of the disc 23. There are multiple first guide holes 21, and multiple first guide holes 21 are arranged around the disc 23 on the fan ring 24. The disc 23 without the fan ring 24 is a first region, and the position of the frequency converter 4 corresponds to the position of the first region.

[0058] In this technical solution, the rear cover 2 is detachably connected to the rear end face of the housing 1 through its disc body 23. Meanwhile, the fan ring 24 can roughly correspond the position of each first guide hole 21 to the position of each housing heat dissipation fin 11 on the housing 1, so that the cooling airflow guided out by each first guide hole 21 can smoothly contact each housing heat dissipation fin 11, effectively improving the cooling efficiency of the motor housing 11.

[0059] See also Figure 3 As shown, in some embodiments, the inner sidewall of each of the first guide holes 21 coincides with the outer peripheral edge of the disk body 23, and the outer diameter of the disk body 23 is d. Each of the first guide holes 21 also has an outer sidewall coaxial with the disk body 23, and the radial width between the inner sidewall and the outer sidewall is b, where 0.065d≤b≤0.12d.

[0060] In this technical solution, by reasonably limiting the radial width b of each first guide hole 21, the cooling airflow guidance effect is better. Specifically, if the b value is too small, the cooling airflow will not easily flow out of the air inlet cavity from the fan cover 51, thus forming vortices and resulting in low airflow on the surface of the casing 1. If the b value is too large, the rectification and guidance effect of the first guide hole 21 will be poor, the direction of the outflowing cooling airflow will be disordered, and the heat dissipation effect on the far end of each casing heat dissipation fin 11 will be poor.

[0061] See details Figure 5As shown, as a specific implementation of the fan cover 51, the fan cover 51 includes an air inlet plate 511 corresponding to the position of the heat dissipation fan blade 5. The air inlet plate 511 has an air inlet 512. The outer periphery of the air inlet plate 511 has a side connecting wall 513 that covers the outer edge of the rear end cover 2. The side connecting wall 513 has a notch at the position corresponding to the first area. The notch forms the second guide hole 22. It can be understood that the part of the aforementioned side connecting wall 513 corresponding to the aforementioned fan ring 24 is arc-shaped, while the position corresponding to the aforementioned first area can be designed as a plane. In this way, the plane can form a planar fit connection with the outer shell 41 of the corresponding frequency converter 4.

[0062] In this technical solution, a notch is directly provided on the side connecting wall 513 to form the aforementioned second guide hole 22. The position of the notch corresponds to the position of the frequency converter 4, and its size can be reasonably selected according to the actual heat dissipation requirements, which simplifies the design difficulty of the cooling airflow introduction structure of the frequency converter 4.

[0063] See further Figure 5 As shown, in some embodiments, the air inlet plate 511 has a flow guide 514 on the side facing the rear end cover 2. The flow guide 514 is arranged around the air inlet 512. By providing the aforementioned flow guide 514 on the inner side of the air inlet 512, the cooling airflow entering the air inlet cavity can be guided and rectified, reducing airflow noise.

[0064] See details Figure 2 As shown, in some embodiments, the frequency converter 4 includes a housing 41 and an electrical component 42 located within the housing 41. A controller heat dissipation component 43 is connected to the electrical component 42. A housing heat dissipation fin 11 corresponding to the first region is enclosed within the housing 41, and this housing heat dissipation fin 11 enclosed within the housing 41 is a first portion of the heat dissipation fin. The controller heat dissipation component 43 is disposed opposite to the first portion of the heat dissipation fin. Specifically, ... Figure 2 The orientation shown is for reference. The first heat dissipation fin is located below the controller heat dissipation component 43. Both are located in the lower area of ​​the outer casing 41. The airflow entering through the second guide hole 22 can cool both at the same time. This obviously simplifies the design difficulty of the cooling airflow channel and simplifies the structural design.

[0065] In some embodiments, the controller heat dissipation component 43 has heat dissipation fins, and each heat dissipation fin and each of the first part heat dissipation ribs are staggered with each other, and the heat exchange channel formed extends along the axial direction of the rotating shaft 3. By staggering the heat dissipation fins and heat dissipation ribs, the overall height of the frequency converter controller 4 can be reduced, and the space is more compact.

[0066] In a preferred embodiment, the motor is a horizontal motor. Taking the position of the motor in use as a reference, the first region is the top region of the housing 1, the first part of the heat dissipation fins is the top heat dissipation fins, the housing heat dissipation fins 11 also include left side heat dissipation fins, right side heat dissipation fins and bottom heat dissipation fins, each of the first guide holes 21 has a left side hole group corresponding to the position of the left side heat dissipation fin, a right side hole group corresponding to the position of the right side heat dissipation fin and a bottom hole group corresponding to the position of the bottom heat dissipation fin, and the fan ring 24 between two adjacent hole groups has a corresponding connecting hole, which can be used to connect with the rear end face of the housing 1.

[0067] In this technical solution, the top heat dissipation fins are cooled by the cooling airflow introduced by the second guide hole 22, while the bottom, left and right heat dissipation fins are cooled by the cooling airflow introduced by the corresponding hole groups.

[0068] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention. The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the protection scope of the present invention.

Claims

1. A drive integrated motor, comprising a housing (1), a rear end cover (2), and a rotating shaft (3), wherein the tail end of the rotating shaft (3) extends out of the outer side of the rear end cover (2), the rear end cover (2) is connected to one end of the housing (1), the housing (1) is further provided with a frequency converter (4), and the outer wall of the housing (1) is provided with housing heat dissipation fins (11), characterized in that, The tail end of the rotating shaft (3) is provided with a heat dissipation fan (5), and the outer side of the heat dissipation fan (5) is covered with a fan cover (51). The fan cover (51) and the rear end cover (2) form an air inlet cavity for cooling airflow. The air inlet cavity has a first guide hole (21) corresponding to the heat dissipation fin (11) of the housing and a second guide hole (22) communicating with the inside of the frequency converter (4). The flow area of ​​the first guide hole (21) is a first area when the rotation speed of the rotating shaft (3) is lower than a first preset value, and a second area when the rotation speed of the rotating shaft (3) is not lower than the first preset value. The second area is greater than the first area. A wind valve plate (211) is provided in the hole of the first guide hole (21). The wind valve plate (211) can be in a first position under the impact of wind force so that the flow area of ​​the first guide hole (21) is the second area. The wind valve plate (211) can also be in a second position under its own weight so that the flow area of ​​the first guide hole (21) is the first area.

2. The integrated drive motor according to claim 1, characterized in that, The air valve plate (211) is pivotally connected to the first guide hole (21); and / or, There is a gap a between the wall of the first guide hole (21) and the air valve plate (211), where 1.5mm≤a≤3mm.

3. The integrated drive motor according to any one of claims 1 to 2, characterized in that, The housing (1) has a cylindrical section, and the housing heat dissipation fins (11) are arranged around the outer side wall of the cylindrical section. The rear end cover (2) has a disc (23) with the same end face size as the cylindrical section and a fan ring (24) continuously arranged around the outer edge of the disc (23). The fan ring (24) protrudes outward along the radial direction of the disc (23). There are multiple first guide holes (21). Multiple first guide holes (21) are arranged around the disc (23) on the fan ring (24). The disc (23) without the fan ring (24) is the first region. The position of the frequency converter (4) corresponds to the position of the first region.

4. The integrated drive motor according to claim 3, characterized in that, The inner sidewall of each of the first guide holes (21) coincides with the outer peripheral edge of the disk body (23), and the outer diameter of the disk body (23) is d. Each of the first guide holes (21) also has an outer sidewall coaxial with the disk body (23). The radial width between the inner sidewall and the outer sidewall is b, 0.065d≤b≤0.12d.

5. The integrated drive motor according to claim 3, characterized in that, The fan cover (51) includes an air inlet plate (511) corresponding to the position of the heat dissipation fan blade (5). The air inlet plate (511) has an air inlet (512). The outer periphery of the air inlet plate (511) has a side connecting wall (513) that covers the outer edge of the rear end cover (2). The side connecting wall (513) has a notch at the position corresponding to the first area, and the notch forms the second guide hole (22).

6. The integrated drive motor according to claim 5, characterized in that, The air inlet plate (511) has a flow guide (514) on the side facing the rear end cover (2), and the flow guide (514) is arranged around the air inlet (512).

7. The integrated drive motor according to claim 3, characterized in that, The frequency converter (4) includes a housing (41) and an electrical component (42) inside the housing (41). A controller heat dissipation component (43) is connected to the electrical component (42). The housing heat dissipation rib (11) corresponding to the first area is covered inside the housing (41), and the housing heat dissipation rib (11) covered inside the housing (41) is the first part of the heat dissipation rib. The controller heat dissipation component (43) is arranged opposite to the first part of the heat dissipation rib.

8. The integrated drive motor according to claim 7, characterized in that, The controller heat dissipation component (43) has heat dissipation fins, and each heat dissipation fin and each of the first part heat dissipation ribs are arranged alternately, and the heat exchange channel formed extends along the axial direction of the rotating shaft (3).

9. The integrated drive motor according to claim 7, characterized in that, The motor is a horizontal motor. Taking the position of the motor in use as a reference, the first area is the top area of ​​the housing (1). The first part of the heat dissipation fins are top heat dissipation fins. The housing heat dissipation fins (11) also include left side heat dissipation fins, right side heat dissipation fins and bottom heat dissipation fins. Each first guide hole (21) has a left side hole group corresponding to the position of the left side heat dissipation fin, a right side hole group corresponding to the position of the right side heat dissipation fin and a bottom hole group corresponding to the position of the bottom heat dissipation fin.

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