Electronic equipment housings and electric motors

Abstract

The present invention relates to an electronic equipment housing (1) for an electric motor (15), wherein the electronic equipment housing (1) has a mounting surface (6) for axially fixing to a stator bushing (20) of the electric motor (15), the mounting surface (6) defining a mounting plane (7) that extends radially with respect to the axis of the electric motor (15), and at least one cooling duct (10a, 10b) is formed in the outer wall (9) of the electronic equipment housing (1), the cooling duct (10a, 10b) extending at least partially axially (11) and designed to transport a flow of cooling air toward the stator bushing (20) of the electric motor (15). The electronic equipment housing (1) has a cooling duct extension (12) for the flow of cooling air, the cooling duct extension (12) extending axially (11) beyond the radially extending mounting plane (7) and forming an axial extension of the cooling duct (10b). The present invention also relates to a corresponding electric motor (15).

Description

Technical Field

[0001] The present invention relates to an electronic device housing for an electric motor, which has an attachment surface for axially fixing to the stator bushing of the electric motor. This attachment surface defines an attachment plane extending radially with respect to the axis of the electric motor. On the outer wall of the electronic device housing, at least one cooling duct extending at least partially axially is formed, and this cooling duct is designed to guide the flow of cooling air towards the stator bushing of the electric motor.

[0002] Furthermore, the present invention relates to an electric motor having this electronic device housing.

Background Art

[0003] Electronic device housings for electric motors of the subject type have been known in practical use for many years. For example, in the technical field of electric motors incorporating electronic devices such as fans, there are already numerous cooling methods for electronic device housings, and the same applies to the cooling of the stator bushing of electric motors.

[0004] As a simple cooling method, there is a method that utilizes the turbulent flow of air between a plurality of fins of an air conveyance element. [[ID=​​​​​​​To ensure proper cooling of the electric motor or its stator bushing, the stator bushing is provided with through holes that extend axially. During the operation of this electric motor, an air-conveying element, connected to the rotor in a manner resistant to torsion, draws airflow axially through a through-hole.

[0006] Furthermore, another modification for cooling this stator bushing and a separate electronic equipment housing is described in Patent Document 2.

[0007] However, conventional electronic equipment housings are not optimal in terms of proper directionality of cooling air and simple manufacturing of stator bushings. Furthermore, conventional electronic equipment housings are not ideal in terms of their versatility and flexibility when it comes to mounting them to the associated electric motor or its stator bushing. [Prior art documents] [Patent Documents]

[0008] [Patent Document 1] International Publication No. 2014 / 019853(A2) [Patent Document 2] German Patent Application Publication No. 102012003414 (B4) [Overview of the Initiative] [Problems that the invention aims to solve]

[0009] Therefore, the object of the present invention is to resolve at least most of the problems that occur in the prior art. The types of electronic equipment housings and electric motors described at the beginning are configured and developed in a simple manner so that cooling air can be more effectively directed to the areas of the components to be cooled, particularly the components of the electronic equipment and / or electric motor. Furthermore, the electronic housing can be mounted to electric motors in a versatile and flexible manner, particularly simplifying the manufacturing of stator bushings. Furthermore, the electronic equipment housing and electric motor according to the present invention are different from competing products. [Means for solving the problem]

[0010] According to the present invention, the above-mentioned objective is achieved by the features of claim 1. According to claim 1, the electronic device housing of the subject has a cooling duct extension for the flow of cooling air, the cooling duct extension extends axially beyond a mounting plane that extends radially, and constitutes an axial extension of the cooling duct.

[0011] With respect to electric motors, the above-mentioned objective is achieved by the features of claim 9. According to claim 9, the electric motor includes an electronic device housing according to the present invention.

[0012] It was first recognized that, according to the method of the present invention, the aforementioned objectives can be achieved with surprising ease by cleverly configuring the electronic device housing. At least one cooling duct extension extends axially beyond the radially extending mounting plane, i.e., within the plane of the stator bushing, around the stator bushing flange, or between multiple fixing elements of the stator bushing.

[0013] According to the present invention, by providing a cooling duct extension to the electronic equipment housing, unlike conventional cooling methods, it becomes unnecessary to provide a through-hole in the stator bushing for axially drawing in cooling air. This is because the cooling air is transported axially through the cooling duct extension towards the air transport element, and is then drawn in through the cooling duct or cooling duct extension by this air transport element. Even without through holes, stator bushings can be manufactured simply. This is because the complex shape that guides the cooling air is already incorporated into the electronic equipment housing and does not need to be formed within the stator bushing. Therefore, the stator bushing can be manufactured simply. Furthermore, the electronic equipment housing according to the present invention is particularly versatile and flexible with respect to mounting to an electric motor or stator bushing. Cooling duct extensions may be used to securely attach the electronic equipment housing to the electric motor or its stator bushing, or to align the electronic equipment housing and the stator bushing relative to each other during the assembly process.

[0014] Therefore, an electronic device housing is provided that can more accurately guide cooling air to the area of ​​the components to be cooled (especially the components of an electric motor). Furthermore, this electronic housing can be mounted to electric motors in a versatile and flexible manner, simplifying the manufacturing of stator bushings. The electronic equipment housing and electric motor according to the present invention are different from competing products.

[0015] In other words, the cooling duct extension may be a guide element or air guide element that guides the cooling air, which is drawn towards the stator bushing side by the air transport element, axially beyond the radially extending mounting plane, towards the components of the electric motor to be cooled.

[0016] The outer wall of the electronic equipment housing may be substantially formed in a cylindrical shape that surrounds the shaft of the electric motor, at least in part. An annular cooling duct extension may be provided along the casing of the outer wall. Alternatively, multiple cooling duct extensions may be provided along the casing of the outer wall. In other words, multiple cooling duct extensions surrounding the electronic device housing may be provided along the perimeter of the electronic device housing. An angular interval may be formed between the plurality of cooling duct extensions.

[0017] The cooling duct extension may have a wall that radially partitions the cooling duct outwardly and / or inwardly. The wall that radially partitions the cooling duct inwardly may be, for example, the same as the outer wall of the electronic device housing. The wall that partitions the cooling duct outwardly may be, for example, in the form of a radial cover device. And this radial cover device may be integrally formed with the outer wall of the electronic device housing, or may be configured as a separate structural member and attachable to the electronic device housing from the radially outer side.

[0018] In other words, the wall may be arranged as a separate part on the cooling duct. For example, the radial cover device may be part of the motor mounting element.

[0019] The cooling duct may be partitioned by fins, for example, in the lateral direction, in other words, in the direction surrounding the electronic device housing. The fins may be formed on the outer side of the outer wall of the electronic device housing. The cooling duct may be defined between two fins. Conversely, fins that separate the two cooling ducts from each other, in other words, fins that laterally partition the two cooling ducts, may be formed between the two cooling ducts. By doing so, the cooling duct can be easily defined and the electronic device housing can be manufactured in a simple manner. In other words, the fins may constitute cooling fins and may increase the heat dissipation surface area from the electronic device housing to the cooling air.

[0020] Fins may extend radially at the stator bushing end of the cooling duct or the cooling duct extension and be provided on the stator bushing. Furthermore, the fins within the stator bushing or on the stator bushing flange may be wavy in order to extend the path of the cooling air and to enlarge the cooling surface. These fins allow for effective radial inward drawing of cooling air to cool the components of the electric motor. The fins of the stator bushing may be positioned to face the air transport element in the axial direction.

[0021] To particularly advantageously cool the components of the electric motor, the cooling duct extension in the air outlet region may be at least partially closed in the axial direction. The advantage of this configuration is that it allows for precise deflection of airflow radially inward. For this purpose, for example, an inward deflection projection may be provided at the stator bushing end of the cooling duct extension to deflect the air outlet inward. Although air deflection may already occur due to the suction of cooling air by the air transport element, some cooling air may leak through gaps (details to be described later). In this respect, the ability to accurately bias the results is advantageous.

[0022] The cooling duct extension may be integrally formed with the electronic equipment housing.

[0023] In particular, considering the flexibility of retrofitting and the simple manufacturing of the electronic equipment housing, the cooling duct extension may take the form of a structural component separate from the electronic equipment housing. In this case, the cooling duct extension can be manufactured separately and can be attached to and / or inserted into the electronic equipment housing. The separate structural member may take the form of, for example, a cooling duct compartment. Multiple cooling duct compartments may be provided along the casing of the outer wall of the electronic equipment housing. In other words, multiple cooling duct compartments may be provided around the electronic device housing, surrounding the electronic device housing. For example, there may be 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16 or more cooling duct compartments. Furthermore, an angular gap may be formed between multiple cooling duct sections. This angular spacing may be constant or different around the entire perimeter of the electronic device housing. The cooling duct compartment may be mounted on the mounting surface of the electronic equipment housing, particularly on the front surface of the electronic equipment housing.

[0024] In an advantageous embodiment, the gasket extending substantially along the mounting plane between the electronic equipment housing and the stator bushing may extend radially inward from the cooling duct extension, and the cooling duct may be located outward.

[0025] Furthermore, the electronic equipment housing may have a bottom and / or cover that extends substantially radially. This further simplifies the manufacturing and installation of electronic equipment housings. Furthermore, the electronic equipment housing may be substantially formed of a cylindrical outer wall and a bottom and / or cover. Furthermore, this bottom and / or cover may be integrally formed with the outer wall or electronic equipment housing. Furthermore, taking into consideration access to the internal space of this electronic device housing, at least one of the bottom and / or cover may be formed as a separate structural member, allowing the electronic device housing to be removed or opened and closed.

[0026] The bottom and / or cover preferably have a heat sink. In particular, the heatsink may be configured as an assembly of materials for thermal connection with the stator bushing at the bottom and / or for thermal connection with the cooling duct at the cover. Heat transfer between the stator bushing and the heat sink may be facilitated by using a thermal conductive material between the stator bushing and the electronic equipment housing (particularly in the area of ​​the bottom heat sink).

[0027] In an advantageous development, the electronic equipment housing may have a cover device in the inlet area of ​​the cooling duct, in an area adjacent to the inlet, and / or at the inlet, the cover device protecting the inlet of the cooling duct from the possibility that cooling air may not be able to reach the inlet if a blocking member is present. The cover device may form a kind of bypass that guides cooling air into the cooling duct even when the inlet is blocked. The inlet of the cooling duct may be formed at the end of the electronic equipment housing that is located axially opposite to the mounting plane, or axially opposite to the air outlet, or axially opposite to the stator bushing end of the cooling duct or the cooling duct extension. For shorter cooling ducts, and / or especially for cooling ducts that extend only partially axially, the cover device may be formed on the outer wall along the perimeter of the electronic equipment housing, on the front, and / or on a portion of the heat sink area, in order to improve the heat conduction and airflow of the surrounding area of ​​the area to be cooled.

[0028] A cover device protecting the inlet of a cooling duct may have protrusions to ensure lateral ventilation even if, for example, dust or leaves block the intake port of the cooling duct. In other words, the protrusions form a bypass that draws cooling air from around the electronic device housing, particularly from the lateral / radial direction. The cover device above the fins of the electronic device housing may have fin-shaped protrusions for ventilation.

[0029] Furthermore, the cover device on the fins of this electronic device housing may have fins and, alternatively or additionally, also have a plurality of cylindrical pins, in other words, protrusions. These protrusions may be made of an elastic material such as a thermoplastic elastomer or rubber, which would prevent damage during handling and / or cleaning and facilitate cleaning. Furthermore, these protrusions form omnidirectional ducts as bypasses, allowing cooling air to flow between the multiple protrusions from all directions, even if the air intake port of the electronic equipment housing at the cooling duct entrance becomes clogged with dirt or leaves during suction. The cover device may have one or more inlet openings for the cooling duct, and preferably is surrounded by protrusions. The flow rate can also be adjusted by skillfully selecting the spacing, size, and / or number of the multiple protrusions. Alternatively, a wavy shape may be adopted instead of, or in addition to, the low-profile protrusions of the cover device, resulting in the valleys of the shape protruding between the multiple fins of the housing, creating an air bypass on the upper side of the cover device toward the intake opening.

[0030] The walls that radially divide the cooling duct outward may take the form of a cover that surrounds the outer wall around the fins extending axially along the cooling duct on the electronic equipment housing and rises radially. Such a cover may consist of, for example, a motor mounting element or an inlet nozzle.

[0031] With respect to electric motors, the above-mentioned objective is achieved by the features of claim 9. According to claim 9, the electric motor includes an electronic equipment housing of the aforementioned type. The electric motor may take the form of, for example, an outer rotor motor for a fan.

[0032] Furthermore, it is preferable that this electric motor includes a stator having stator bushings and a rotor having a rotor shape. Furthermore, the rotor's outer shape may be formed radially outward from the stator bushing tower surrounding the stator bushing. Multiple flange sections for axial fixing to a fixed wall or support structure may be formed on the radially outward side of the stator bushing.

[0033] As a particularly advantageous, versatile, and flexible feature when attaching electronic equipment housings to electric motors, flange compartments may have holes that function as fixing holes. The flange section defines the support ring. In other words, the flange section defines the support ring section on which the motor can be fixed. Furthermore, the entire electric motor can be fixed to a stable fixed wall or support structure on the flange section, or on the support ring defined by this flange section. Alternatively, the support ring may be formed in a circumferential shape.

[0034] Several mounting methods are possible. An electric motor or fan may be fixed to a fixed wall or support structure from one side, and then an electronic equipment housing may be attached from the other side.

[0035] Alternatively, the electronic equipment housing may be attached to an electric motor, and the assembly consisting of the electronic equipment housing and the electric motor may be attached to a fixed wall. Both mounting methods are possible and offer advantages in terms of assembly, electronic housing, and / or installation and removal of electronic components during maintenance.

[0036] Preferably, the multiple cooling duct extensions are arranged in a manner that surrounds the perimeter of the electronic equipment housing, between multiple flange sections for axially securing the stator bushing.

[0037] It is preferable that the multiple cooling duct extensions are arranged radially within a diameter region defined by multiple flange compartments or support rings. Furthermore, the diameter region defined by the flange section or support ring may be, for example, the inner diameter of the support ring or the central diameter of the support structure. The cooling duct extensions may be arranged radially within the region defined by the central diameter of the support structure. In other words, the inner diameter of the support ring and / or the inner diameter of the flange compartment and / or the central diameter of the support structure may be larger than the outer diameter of the electronic equipment housing. The inner diameter of the flange compartment may differ from the central diameter of the support structure. The flange compartment may have a central / screwed area for securing the motor and an inner area to which the electronic equipment housing is supported or secured to the flange compartment. The cooling duct extension is preferably located within this central region, that is, between the central region for motor fixing and the radially inner end of the flange section in the radial direction. The diameter region defined by the flange section may be the outer diameter of the flange section, or the outer diameter of the screw fixing cam within the screw fixing region. In this case, the motor mounting portion may have a suitable recess for the cooling duct extension.

[0038] The advantage of this configuration is that the assembly, consisting of the electric motor and the electronic housing, can be incorporated into a fixed wall or support structure particularly easily from one side. The electronic equipment housing can be inserted through a mounting opening in a fixed wall or support structure, and the electric motor or stator bushing can then be mounted to the fixing holes of the stator bushing on the fixed wall or support structure. This eliminates the need for additional installation procedures related to the electronic equipment housing. This is because it eliminates the need to later attach the housing to the electric motor or the fixed wall or support structure from the opposite side of the fixed wall or support structure.

[0039] The cooling duct extension extends axially beyond the radially extending mounting plane to the vicinity of the air conveying element that rotates with the rotor, and it is preferable that there is an axial gap between the cooling duct extension and the air conveying element. In other words, the cooling duct extension extends axially to approximately the same position as the air transport element.

[0040] Furthermore, this air transport element may be demarcated or covered by a cover disc in the direction toward the cooling duct extension or the electronic equipment housing. In particular, the cover disc may be annular. Preferably, the cooling duct extension protrudes axially to such an extent that a slight axial gap is created between it and the cover disc of the air transport element.

[0041] Preferably, the area of ​​the outer wall of the electronic equipment housing that is located axially opposite the flange section does not contain a cooling duct. In this case, it is preferable that the cooling duct is not designed to enclose the entire structure, but rather is divided at least by flange compartments and mounting holes for stator bushings. This allows for a smaller electronic device housing structure and reduces obstruction of airflow.

[0042] There are various possibilities for constructing and developing the present invention in advantageous embodiments. In this regard, please refer, on the one hand, to the claims dependent on claim 1, and on the other hand, to the following description of embodiments of the present invention using the drawings. When describing the present invention using drawings, the structure and development of the present invention will also be explained in general terms. [Brief explanation of the drawing]

[0043] [Figure 1] A perspective view of a first embodiment of an electronic device housing according to the present invention, viewed from the bottom, showing that the cooling duct extension protrudes beyond the mounting plane that extends radially. [Figure 2] A perspective view of an electric motor, which has a flange section for fixing the stator bushing axially to the mounting surface of an electronic equipment housing. [Figure 3] Figure 1 shows the electronic equipment housing and Figure 2 shows the electric motor assembled. This is a perspective view of the assembled state. [Figure 4] A cross-sectional view of the assembled electronic equipment housing shown in Figure 1 and the electric motor shown in Figure 2. [Figure 5] Figure 2 shows a perspective view of the stator bushing of an electric motor. [Figure 6] Detailed view of the cooling structure region in Figure 5, with additional fins schematically depicted. [Figure 7] A detailed cross-sectional view of Figure 4, showing the path of cooling air from the cooling duct inlet to the air transport element. [Figure 8] Detailed view of Figure 7, showing the heat dissipation path. [Figure 9] A perspective view of a cooling duct extension, which is formed as a separate structural member in the form of a cooling duct compartment. [Figure 10] A cross-sectional view of an electronic device housing according to a second embodiment, in which the cooling duct extension protrudes beyond a mounting plane that extends radially. [Figure 11] A perspective view of the cover of the electronic equipment housing shown in Figure 1, in which the cover device protects the inlet of the cooling duct or the cooling duct from a blocking member. [Figure 12] A cross-sectional view of an electronic device housing of a third embodiment, in which the cooling duct extension protrudes beyond the mounting plane that extends radially, the cooling duct inlet is closed, and a heat dissipation path is depicted. [Figure 13] Figure 11 shows a perspective view of the cover of the electronic equipment housing, with the cover device removed. [Figure 14]A perspective view of an electronic device housing according to a third embodiment of the present invention, viewed from the bottom. [Figure 15] Figure 14 is a perspective view of the assembled electronic equipment housing and electric motor. [Figure 16] Figure 14 shows a cross-sectional view of the assembled electronic equipment housing and electric motor. [Modes for carrying out the invention]

[0044] Figure 1 is a perspective view of an electronic device housing 1 according to a first embodiment of the present invention, viewed from the bottom side. The electronic device housing 1 has a partially closed bottom 2. The bottom portion 2 is designed to contact the stator bushing of an electric motor, which is not shown in Figure 1. Power electronic equipment (e.g., semiconductor components) can be connected to the upper surface of the bottom portion 2 in a manner that allows heat to be conducted. The bottom portion 2 is provided with through-holes 3 for lead wires or contacts connected to the motor, and through-holes 4 for the shaft end of the electric motor or for parts that position the air conveying element.

[0045] The electronic equipment housing 1 has a mounting surface 6 at its bottom 2 for axially fixing to the stator bushing of an electric motor. The mounting surface 6 defines a mounting plane 7 that extends radially with respect to the shaft of the electric motor.

[0046] The outer wall 9 is formed in a substantially cylindrical shape. Cooling ducts 10a and 10b are formed on the outer wall 9 of the electronic equipment housing 1, extending in the axial direction 11. These cooling ducts 10a and 10b are designed to guide the flow of cooling air toward the stator bushing of the electric motor. The cooling duct 10a terminates on the mounting plane 7. The electronic equipment housing 1 has a cooling duct extension 12 for the flow of cooling air, which extends axially 11 beyond the mounting plane 7 that extends radially and constitutes the axial extension of the cooling duct 10b. The cooling duct extension 12 is provided along the casing of the outer wall 9. As a result, multiple cooling duct extensions 12 surrounding the electronic equipment housing 1 are provided along the perimeter of the electronic equipment housing 1. Therefore, an angular gap is formed between the multiple cooling duct extensions 12.

[0047] Figure 2 is a perspective view of the electric motor 15. Viewed from above, the stator bushing 20 or stator bushing flange 21, which has a bottom, can be seen. The stator bushing flange 21 has through holes 23 and 24, which correspond to through holes 3 and 4 of the electronic equipment housing 1 in Figure 1. Through-hole 3 does not necessarily have to be the same size as through-hole 4, but it must be in the same position / location, that is, it must be located opposite to one another. The shaft end 25 of the electric motor 15 can be seen inside the through hole 24. The shaft end 25 may have, for example, a cooling wheel for cooling electronic components and / or a magnet for position detection, which are not shown in the figure.

[0048] The electric motor 15 has a rotor outer diameter 26. The central diameter region 27 is roughly depicted by a dashed circle. An air transport element 28 is connected to the rotor or rotor outer rim 26 in a manner resistant to torsion, and this air transport element 28 is demarcated or covered by a cover disc 29 in the direction toward the stator bushing flange 21. Multiple flange sections 30, each having a hole 31 for axial fixing to a fixed wall or support structure (not shown), are formed radially outward of the stator bushing 20 or stator bushing flange 21. The flange section 30 defines the support ring section, or in other words, it forms a (divided) support ring for the electric motor 15 on the stator bushing 20. The electric motor 15 may be positioned around the central diameter region 27 when it is fixed axially to the support structure.

[0049] Figure 3 is a perspective view of the assembled electronic equipment housing 1 from Figure 1 and the electric motor 15 from Figure 2. A radially oriented connecting projection 32 is formed on the outer wall 9 of the electronic equipment housing 1, and the electronic equipment housing 1 is securely screwed to the stator bushing flange 21 using this connecting projection 32. These radially connecting protrusions 32 are located within a central diameter region 27 of a support structure (not shown) that is separated by a step in the flange section 30. The area of ​​the outer wall 9 of the electronic equipment housing 1 that is located opposite the flange section 30 in the axial direction 11 does not include a cooling duct. Furthermore, this electronic device housing 1 is located radially inward of the flange section 30 of the support ring. The inner diameter of this support ring is larger than the outer diameter of the electronic device housing 1.

[0050] The cooling duct extension 12 of the cooling duct 10b extends axially 11 beyond the mounting plane 7 which extends radially, and protrudes to the vicinity of the air conveying element 28 in the region between the multiple flange sections 30, creating an axial gap 34 between the cooling duct extension 12 and the air conveying element 28. The electronic device housing 1 is closed by a separate, removable cover 35.

[0051] Figure 4 is a cross-sectional view of the assembled electronic equipment housing 1 and electric motor 15. The rotor outer diameter 26 is formed radially outward from the stator bushing tower 38 surrounding the stator bushing 20 and the sheet laminate 39 having the motor windings, and rotates together with the shaft. The shaft end 25 is accessible from the electronic equipment housing 1 through through holes 24, 4. The bottom section 2 has a heatsink 41. The heatsink 41 is formed as an aggregate of material within the bottom 2 for thermal connection with the stator bushing 20. The power electronic equipment 43 is arranged on the heatsink 41 and is shown schematically.

[0052] Figure 5 is a perspective view of the stator bushing 20 of an electric motor 15 (without the sheet laminate 39, motor windings, and rotor outer diameter 26 around the stator bushing tower 38). The stator bushing flange 21 has corrugated fins 45 that extend in the axial direction 11 toward the air transport element 28 (not shown in Figure 5). The air discharged from the cooling duct extension 12 of the electronic equipment housing 1 can be drawn radially inward through the multiple corrugated fins 45 in order to cool the stator.

[0053] Figure 6 is a detailed view of the cooling structure region shown in Figure 5, and schematically depicts additional fins 46 (not shown in Figure 6) that guide air in the air outlet region of the cooling duct extension 12.

[0054] Figure 7 is a detailed view of Figure 4. A gasket 47 between the electronic equipment housing 1 and the stator bushing 20 is schematically shown, and this gasket 47 extends radially inward from the cooling duct extension 12.

[0055] The path of the cooling air from the inlet 48 of the cooling duct 10b to the air transport element 28 is indicated by the arrow. As the air transport element 28 rotates together with the rotor outer diameter 26, the air transport fins 50 generate an airflow radially outward. As a result, a partial vacuum is created at the inlet 48 of the cooling duct 10b, and air is drawn in. This air then passes through the cooling duct 10b, which is separated on the outside by a radial cover device or wall 51, and proceeds through the cooling duct extension 12 to the air outlet 52. Furthermore, the air exiting from the cooling duct extension 12 of the electronic equipment housing 1 is drawn radially inward between the multiple corrugated fins 45 of the stator bushing 20 by suction. Then, at the radially inner end 53 of the corrugated fin 45, the air leaves the stator bushing 20 and flows into the air transport element 28. In the air conveying element 28, air moves radially outward through the air conveying fins 50 and is discharged radially outward at the air conveying element 28.

[0056] Figure 8 is essentially equivalent to Figure 7. In addition to the cooling air path, the arrows indicate a heat dissipation path that runs from the power electronic equipment 43, through the heat sink 41 located at the bottom 2 of the electronic equipment housing 1, through the stator bushing flange 21, and back to the cooling air path. The cooling duct extension 12 is partially closed axially in the region of the air outlet 52. This is because the radial cover device has a raised portion at the air outlet 52 that faces radially inward in the form of a deflection projection. Heat transfer between the stator bushing 20 and the heat sink 41 is facilitated by the use of a thermal conductive material 54, schematically shown, between the stator bushing 20 and the electronic equipment housing 1 in the region of the heat sink 41.

[0057] According to Figures 7 and 8, the cooling duct extension 12 is integrally formed with the outer wall 9 of the electronic equipment housing 1.

[0058] On the other hand, Figure 9 shows another design configuration, a cooling duct extension 12 that takes the form of a separate structural member and can be attached to the radially outer side of the electronic equipment housing 1. Each of the three cooling ducts 10b is configured as a cooling duct compartment 55 along the compartment ring 56. Furthermore, this cooling duct compartment 55 has an opening 57 on the partition ring 56 in the direction of the cooling duct 10b in the outer wall 9 of the electronic equipment housing 1.

[0059] Figure 10 is a cross-sectional view of the electronic device housing 1 of the second embodiment, which includes an electric motor 15, and is substantially equivalent to Figure 7. Unlike the first embodiment, the cooling duct 10b of the electronic equipment housing 1 first contacts the offset region 60 of the stator bushing flange 21 in the axial direction. As a result, the offset region 60 of the stator bushing flange 21 is further cooled. Furthermore, this offset region 60 has additional fins 46, as also shown in Figure 6.

[0060] Figure 11 is a perspective view of the cover 35 integrated into the electronic device housing 1. A cover device 62 can be seen that protects the inlet 48 of the cooling duct 10b from the possibility that cooling air may not be able to reach the inlet 48 if a blocking member is present. Furthermore, this cover device 62 has a plurality of cylindrical pins, in other words, protrusions 63. The cover device 62 is preferably made of a material with high thermal conductivity. Furthermore, the increased surface area due to the protrusions 63 improves heat dissipation.

[0061] Figure 12 is a cross-sectional view of the electronic equipment housing 1 of the third embodiment, in which the cooling duct extension 12 protrudes beyond the mounting plane 7 that extends radially. The electronic equipment housing 1 has a cover device 62, as shown in Figure 11, at the inlet 48 of the cooling duct 10b. The blocking member 65 is schematically shown on the cover device 62. In reality, the blocking member 65 may be, for example, a leaf, a branch, or a similar foreign object. The inlet 48 of the cooling duct 10b is blocked from above by the blocking member 65, thus preventing the suction of cooling air at the inlet 48. The protrusions 63 of the cover device 62 form omnidirectional ducts as bypasses, allowing air from all directions, in this case particularly radial air (lateral air), to flow between the multiple protrusions 63. The path of the cooling air is indicated by the arrow.

[0062] The heatsink 41 is formed inside the cover 35 or the electronic device housing 1. The heat sink 41 is formed as an assembly of materials within the cover 35 or electronic equipment housing 1 for thermal connection with the cooling duct 10b. The power electronic equipment 43 is schematically shown in a configuration on the heatsink 41. The heat dissipation path from the power electronic equipment 43, through the heat sink 41 inside the cover 35 of the electronic equipment housing 1, to the cooling air path, i.e., to the cooling duct 10b, is indicated by the arrow.

[0063] Figure 13 is a perspective view of the cover 35 of the electronic equipment housing 1 shown in Figure 11, where the cover device 62 has been removed and is not shown. Fins can be seen at the bottom of the electronic equipment housing 1, forming the cooling duct 10b and its inlet 48.

[0064] Figure 14 substantially corresponds to Figure 1 and is a perspective view of the electronic device housing 1 according to the third embodiment of the present invention, viewed from the bottom. The electronic device housing 1 has no bottom, and the heatsink 41 is formed inside the cover 35.

[0065] Figure 15 is substantially equivalent to Figure 3 and is a perspective view of the assembled electronic equipment housing 1 and electric motor 15 from Figure 14. A portion of the cover 35 is configured in the form of a removable wiring space cover 67.

[0066] Figure 16 is substantially the same as Figure 4 and is a cross-sectional view of the assembled electronic equipment housing 1 and electric motor 15 from Figure 14.

[0067] For further advantageous configurations of the apparatus according to the present invention, please refer to the general portion of the specification and the appended claims to avoid repetition.

[0068] Finally, the above-described embodiments of the apparatus according to the present invention are useful only for the claimed teachings and do not limit the claimed teachings to these embodiments. [Explanation of Symbols]

[0069] 1. Electronic equipment housing 2...Bottom 3. Through hole 4 ···Through hole 6 ···Mounting surface 7 ···Mounting surface 9 ···Exterior wall 10 ···Cooling duct 11 ···Axis 12 ···Cooling duct extension 15. Electric motor 20 ···Stadium brushing 21 ··· Stay Tap Heading Flange 23 ···Through hole 24 ···Through hole 25...shaft end 26 ···Rotor outer diameter 27...center diameter area 28 ···Air conveying element 29 ···Cover Disc 30 ···Flange compartment 31...Hole 32...Connection protrusion 34...gap 35 ···cover 38 ···Status Bushing Tower 39 ···Laminate of sheets with motor windings 41 ··· Heatsink 43...Power electronic equipment 45 ···Wavy fins 46... Additional fins 48...Entrance 50 ···Air conveying fins 51 ···Radial Cover Device 52 ···Air outlet 53...radial inner end 54... Conductive materials 55 ···Cooling duct section 56 ···Partition Ring 57 ···Opening 60 ···Offset area 62 ···Cover device 63...protrusion 65 ···Blocking member 67 ···Wiring space cover

Claims

1. An electronic device housing (1) having a mounting surface (6) for being fixed axially to the stator bushing (20) of an electric motor (15), The mounting surface (6) defines a mounting plane (7) that extends radially with respect to the shaft of the electric motor (15), At least one cooling duct (10a, 10b) is formed in the outer wall (9) of the electronic equipment housing (1), which extends at least partially in the axial direction (11). The cooling ducts (10a, 10b) are designed to guide the flow of cooling air toward the stator bushing (20) of the electric motor (15), The electronic device housing (1) has a cooling duct extension (12) for the flow of the cooling air, The electronic equipment housing (1) is characterized in that the cooling duct extension (12) extends axially (11) beyond the mounting plane (7) that extends radially, thereby forming an axial extension of the cooling duct (10b).

2. The cooling duct extension (12) has a wall (51) that radially divides the cooling duct (10b) toward the outside and / or the inside, The electronic equipment housing (1) according to claim 1, characterized in that the wall (51) is arranged as a separate component on the cooling ducts (10a, 10b).

3. The electronic equipment housing (1) according to either claim 1 or claim 2, characterized in that the cooling duct extension (12) is at least partially closed in the axial direction in the region of the air outlet (52).

4. The electronic equipment housing (1) according to any one of claims 1 to 3, characterized in that the cooling duct extension (12) takes the form of a structural member separate from the electronic equipment housing (1).

5. The electronic equipment housing (1) according to any one of claims 1 to 4, characterized in that the gasket (47) extending substantially along the mounting plane (7) between the electronic equipment housing (1) and the stator bushing (20) extends radially inward from the cooling duct extension (12).

6. An electronic device housing (1) according to any one of claims 1 to 5, further comprising a substantially radially extending bottom (2) and / or cover (35).

7. The bottom portion (2) and / or the cover (35) have a heat sink (41), The electronic device housing (1) according to any one of claims 1 to 6, characterized in that a heat conductive material (54) is disposed between the bottom portion (2), the bottom portion (29) of the heat sink (41) region, and the stator bushing (20).

8. The electronic equipment housing (1) has a cover device (62) at the inlet (48) of the cooling duct (10b), The electronic equipment housing (1) according to any one of claims 1 to 7, characterized in that the cover device (62) protects the inlet (48) of the cooling duct (10a, 10b) from the possibility that cooling air may not be able to reach the inlet (48) when the blocking member (65) is present.

9. A cover device (62) for an electronic device housing (1) as described in claim 8, A cover device (62) characterized by having a plurality of cylindrical pins and / or a wavy outer shape.

10. An electric motor (15) comprising an electronic device housing (1) as described in any one of claims 1 to 8.

11. An electric motor (15) according to claim 10, further comprising a stator having a stator bushing (20), and a rotor having a rotor outer shape (26) formed radially outward of a stator bushing tower (38) surrounding the stator bushing (20), The electric motor (15) according to claim 10, characterized in that a plurality of flange sections (30) for axial fixing to a fixed wall or support structure are formed radially outward of the stator bushing (20).

12. Multiple cooling duct extensions (12) are arranged in a manner that surrounds the periphery of the electronic equipment housing (1) between multiple flange sections (30) for axially fixing the stator bushing (20). The electric motor (15) according to claim 10 or claim 11, characterized in that a plurality of cooling duct extensions (12) are arranged radially within a diameter region defined by a plurality of flange sections (30) or support rings.

13. The cooling duct extension (12) extends axially beyond the radially extending mounting plane (7) to the vicinity of the air transport element (28) that rotates with the rotor, An electric motor (15) according to any one of claims 10 to 12, characterized in that an axial gap (34) is provided between the cooling duct extension (12) and the air conveying element (28), preferably between the cooling duct extension (12) and the cover disc of the air conveying element (28).

14. An electric motor (15) according to any one of claims 10 to 12, characterized in that the region of the outer wall (9) of the electronic equipment housing (1) that is located opposite the flange section (30) in the axial direction (11) does not include a cooling duct.

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