CN113541407A - External rotor motor capable of enhancing heat dissipation - Google Patents
External rotor motor capable of enhancing heat dissipation Download PDFInfo
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- CN113541407A CN113541407A CN202110736232.3A CN202110736232A CN113541407A CN 113541407 A CN113541407 A CN 113541407A CN 202110736232 A CN202110736232 A CN 202110736232A CN 113541407 A CN113541407 A CN 113541407A
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- chip
- sheet
- control box
- elastic pressing
- hole
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/30—Structural association with control circuits or drive circuits
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/18—Casings or enclosures characterised by the shape, form or construction thereof with ribs or fins for improving heat transfer
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
- H02K5/207—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium with openings in the casing specially adapted for ambient air
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/22—Auxiliary parts of casings not covered by groups H02K5/06-H02K5/20, e.g. shaped to form connection boxes or terminal boxes
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
- H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
- H02K9/06—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Cooling Or The Like Of Electrical Apparatus (AREA)
Abstract
The invention discloses an external rotor motor capable of enhancing heat dissipation, and aims to provide an external rotor motor capable of enhancing heat dissipation, which can effectively solve the problems that in the prior art, a controller of an external rotor motor is poor in heat dissipation effect, and the operation reliability and the service life of a chip are affected. The stator comprises a stator shell, wherein the stator shell comprises a control box, an electric control board and a chip arranged on the electric control board are arranged in the control box, the stator shell further comprises a loosening-preventing chip compression structure, the surface of the inner side wall of the control box at least comprises a chip mounting plane, a plurality of radiating fins are arranged on the surface of the outer side wall of the control box, corresponding to the mounting plane, of the outer side wall, the chip is close to the chip mounting plane, the loosening-preventing chip compression structure comprises an elastic pressing sheet, and the elastic pressing sheet is arranged in the control box and used for compressing one side face of the chip on the chip mounting plane.
Description
Technical Field
The invention relates to an outer rotor motor, in particular to an outer rotor motor capable of enhancing heat dissipation.
Background
The stator shell of the outer rotor motor is generally provided with a controller, the controller comprises a control box arranged at the end part of the stator shell, an electric control board arranged in the control box and a chip arranged on the electric control board, and the chip on the electric control board can generate heat in the running process of the motor, and meanwhile, the motor can also generate heat to influence the temperature of the control box.
Disclosure of Invention
The invention aims to provide an outer rotor motor capable of enhancing heat dissipation, which can effectively solve the problems that in the prior art, the heat dissipation effect of a controller of the outer rotor motor is poor, the operation reliability of a chip is affected and the service life of the chip is prolonged.
The technical scheme of the invention is as follows:
the utility model provides a can strengthen radiating external rotor electric machine, includes stator housing, and stator housing includes the control box, is equipped with automatically controlled board and sets up the chip on automatically controlled board in the control box, still includes locking chip compact structure that moves, including a chip mounting plane in the inside wall surface of control box at least, the lateral wall of control box is equipped with a plurality of radiating fin with the position that mounting plane corresponds on the surface, the chip is close to chip mounting plane, locking chip compact structure that moves includes the elasticity preforming, the elasticity preforming sets up in the control box for compress tightly a side of chip on chip mounting plane.
The external rotor electric machine of this scheme compresses tightly a side of chip on the chip mounting plane through the elasticity preforming, and the lateral wall at the control box is equipped with a plurality of radiating fin with the position that the mounting plane corresponds on the surface, so, calorific capacity in the chip working process can distribute the release through the lateral wall and the radiating fin of control box, thereby distribute the release through as short as possible heat conduction way and heat conduction area as big as possible, in order to strengthen the radiating effect, the radiating effect with the controller that can effectively solve external rotor electric machine among the prior art is not good, can influence chip operational reliability and life's problem.
Preferably, a step surface is arranged between the top of the chip mounting plane and the surface of the inner side wall of the control box, the anti-loosening chip pressing structure further comprises a pressing sheet mounting slot arranged at the upper part of the chip mounting plane, a limiting post hole arranged on the step surface, a connecting screw hole arranged on the bottom surface of the limiting post hole and a limiting bolt,
the limiting post hole is intersected with the pressing sheet mounting slot, the limiting post hole comprises an upper limiting hole positioned above the pressing sheet mounting slot and a lower limiting hole positioned below the pressing sheet mounting slot, the connecting screw hole is arranged on the bottom surface of the lower limiting hole,
the limiting bolt comprises a limiting column matched with the limiting column hole and a screw arranged at the lower end of the limiting column,
the elastic pressing sheet comprises an installation inserting sheet and an elastic pressing sheet used for pressing the chip, wherein the installation inserting sheet is provided with an inserting sheet limiting hole matched with a limiting column, the installation inserting sheet is inserted into the pressing sheet installation slot, the limiting column sequentially penetrates through the upper limiting hole and the inserting sheet limiting hole and stretches into the lower limiting hole, the screw rod is matched with the connection screw hole, and one side face of the chip is pressed on the chip installation plane by the elastic pressing sheet.
Because the motor can frequently generate vibration in the working process, if the elastic pressing sheet is directly locked and fixed on the inner side wall of the control box by adopting a common bolt, the elastic pressing sheet is easy to loosen due to the loosening of the bolt, the side surface of the chip can not be pressed on the chip mounting plane,
locking chip compact structure that moves leads to compressing tightly and appearing the clearance between the chip mounting plane, and the calorific capacity in the chip course of operation can't be quick gives off the release through the lateral wall and the radiating fin of control box, influences chip operational reliability and life's problem. In order to solve the problem, the anti-loosening chip pressing structure is arranged, even if bolts generated due to working vibration of a motor are loosened, the elastic pressing piece is not influenced to press one side face of a chip on a chip mounting plane, and the elastic pressing piece is guaranteed to press one side face of the chip on the chip mounting plane, so that heat generated in the working process of the chip is rapidly dissipated and released through the side wall of a control box and a heat dissipation fin; the screw rod of the limiting bolt is matched with the connecting screw hole and is only used for ensuring that the limiting column passes through the inserting sheet limiting hole and preventing the limiting column from falling off the inserting sheet limiting hole; so, even the screw rod that spacing bolt appears is not hard up, as long as spacing post keeps passing the spacing hole of inserted sheet, just can guarantee that elasticity compressing tightly the piece compresses tightly a side of chip on chip mounting surface, and the not hard up axial displacement of the spacing bolt that causes of screw rod is generally very little, therefore even the screw rod is not hard up, also can guarantee that spacing post keeps passing the spacing hole of inserted sheet, therefore can effectively solve because of the bolt is not hard up, and lead to compressing tightly and the problem that the clearance appears between the chip mounting surface.
Preferably, the mounting insertion piece and the elastic pressing piece are integrally formed in a bending mode.
Preferably, the elastic pressing sheet is in an N shape and comprises a vertical supporting sheet, an elastic connecting sheet and an elastic pressing sheet, wherein the upper end of the vertical supporting sheet is connected with the installation inserting sheet, the elastic connecting sheet is formed by bending the lower end of the vertical supporting sheet upwards, the elastic pressing sheet is formed by bending the upper end of the elastic connecting sheet downwards, the elastic pressing sheet, the elastic connecting sheet and the installation inserting sheet are positioned on the same side of the vertical supporting sheet, the thicknesses of the elastic pressing sheet, the elastic connecting sheet and the vertical supporting sheet are sequentially reduced,
before the elastic pressing sheet is installed on the control box, the installation inserting sheet is perpendicular to the vertical supporting sheet, the included angle between the elastic pressing sheet and the installation inserting sheet is 85-89 degrees, and the lower part of the elastic pressing sheet inclines towards the direction far away from the vertical supporting sheet;
in the process of installing the elastic pressing sheet on the control box, the installation inserting sheet is inserted into the pressing sheet installation slot until the end part of the installation inserting sheet is abutted against the inner end face of the pressing sheet installation slot, in the process, the lower end of the elastic abutting sheet is abutted against the side face of the chip firstly, and one side face of the chip is pressed on the chip installation plane; then, the upper end of the elastic pressing sheet is close to and pressed against the side surface of the chip, so that the surface of the elastic pressing sheet is completely tightly attached to the side surface of the chip; then, the end part of the mounting inserting sheet is abutted against the inner end surface of the pressing sheet mounting slot;
when the tip of installation inserted sheet supported on the interior terminal surface of preforming installation slot, the spacing hole of inserted sheet was aligned with spacing post hole, then, passed spacing post in proper order and go up spacing hole of spacing hole and inserted sheet and stretch into down spacing downthehole, screw rod and connection screw cooperation.
So, can not influence under the condition that the elasticity preforming compresses tightly the side of chip on the chip mounting plane, guarantee that the elasticity of elasticity pressing piece supports the surface of preforming and hugs closely on chip another side completely to calorific capacity in making the chip working process can also give off the release through the lateral wall that the elasticity preforming (elasticity preforming is the shaping of bending as an organic whole) transmitted the control box, gives off release calorific capacity through the heat conduction way as short as possible, further reinforcing radiating effect.
Preferably, the clearance between the pressing sheet installation slot and the installation inserting sheet is filled with heat-conducting silica gel.
Preferably, the gap between the chip mounting plane and the side surface of the chip is filled with heat-conducting silica gel.
Preferably, the motor further comprises a rotor shell and a rotor fixedly arranged in the rotor shell, the rotor shell and the control box are distributed in the axial direction of the outer rotor motor in a relative mode, a centrifugal wind wheel is arranged at one end, facing the control box, of the rotor shell, and an air inlet of the centrifugal wind wheel faces the control box. When the rotor rotates, the centrifugal wind wheel sucks the cold air around by utilizing centrifugal force, radial air outlet and axial air inlet, thereby forming cooling circulation to the control box and further improving the heat dissipation effect of the control box.
Preferably, a plurality of convex rib plates which are uniformly distributed around the circumference of the rotating shaft of the outer rotor motor are arranged on one end face of the control box facing the centrifugal wind wheel, a space between any two adjacent convex rib plates forms a radial air guide groove, and the radial air guide groove extends along the radial direction of the rotating shaft of the outer rotor motor. So, when the rotor was rotatory, centrifugal wind wheel inspiratory cold air will get into centrifugal wind wheel's air intake through radial wind-guiding groove, is favorable to cold air radial introduction to improve the radiating effect of control box.
Preferably, one part of the radial air guide grooves is linear radial air guide grooves, and the other part of the radial air guide grooves is wavy linear radial air guide grooves. Therefore, the path of cold air passing through the radial air guide groove can be prolonged through the wave line type radial air guide groove, so as to improve the heat dissipation effect of the control box,
preferably, the centrifugal wind wheel is mounted to one end of the rotor housing by bolts.
The invention has the beneficial effects that: the problem that in the prior art, the heat dissipation effect of a controller of an outer rotor motor is poor, the operation reliability of a chip is affected, and the service life of the chip is prolonged can be effectively solved.
Drawings
Fig. 1 is a schematic structural diagram of an external rotor motor capable of enhancing heat dissipation according to a first embodiment of the present invention.
Fig. 2 is a top view of a control box of an external rotor motor capable of enhancing heat dissipation according to an embodiment of the present invention.
Fig. 3 is a partially enlarged view of a portion a in fig. 1.
Fig. 4 is a schematic partial structure diagram of a loose chip pressing structure of an outer rotor motor capable of enhancing heat dissipation according to a second embodiment of the present invention.
Fig. 5 is a schematic structural diagram of an external rotor motor capable of enhancing heat dissipation according to a third embodiment of the present invention.
Fig. 6 is a schematic cross-sectional view of an outer rotor motor capable of enhancing heat dissipation according to a third embodiment of the present invention.
Fig. 7 is a top view of rib plates and radial air guide grooves of an outer rotor motor capable of enhancing heat dissipation according to a third embodiment of the present invention.
In the figure:
the structure comprises a stator shell 1, a control box 1.1, a box cover 1.2, a radiating fin 1.3, a chip mounting plane 1.4 and a step surface 1.5;
an electric control board 2;
a chip 3;
the anti-loosening chip pressing structure comprises an anti-loosening chip pressing structure 4, an elastic pressing sheet 4.1, an installation inserting sheet 4.11, an elastic pressing sheet 4.12, a vertical supporting sheet 4.121, an elastic connecting sheet 4.122, an elastic abutting sheet 4.123, a pressing sheet installation slot 4.2, a limiting column hole 4.3, an upper limiting hole 4.31, a lower limiting hole 4.32, a connecting screw hole 4.4, a limiting bolt 4.5, a limiting column 4.51 and a screw rod 4.52;
a rotor case 5;
a centrifugal wind wheel 6 and an air inlet 6.1;
a convex rib plate 7;
and a radial air guide groove 8.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention are clearly explained and illustrated below with reference to the accompanying drawings, but the following embodiments are only preferred embodiments of the present invention, and not all embodiments. Based on the embodiments in the implementation, other embodiments obtained by those skilled in the art without any creative effort belong to the protection scope of the present invention.
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present scheme, and are not construed as limiting the scheme of the present invention.
These and other aspects of embodiments of the invention will be apparent with reference to the following description and attached drawings. In the description and drawings, particular embodiments of the invention have been disclosed in detail as being indicative of some of the ways in which the principles of the embodiments of the invention may be practiced, but it is understood that the scope of the embodiments of the invention is not limited thereby. On the contrary, the embodiments of the invention include all changes, modifications and equivalents coming within the spirit and terms of the claims appended hereto.
In the description of the present invention, it is to be understood that the terms "thickness", "upper", "lower", "horizontal", "top", "bottom", "inner", "outer", "circumferential", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., and "several" means one or more unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The first embodiment is as follows: as shown in fig. 1 and 2, an external rotor motor capable of enhancing heat dissipation includes a stator housing 1 and a locking chip compression structure 4. The stator housing comprises a control box 1.1. An electric control board 2 and a chip 3 arranged on the electric control board are arranged in the control box. The surface of the inner side wall of the control box at least comprises one chip mounting plane 1.4, and in the embodiment, the surface of the inner side wall of the control box comprises two chip mounting planes. The electric control board is fixed on the bottom surface of the control box. The position on the surface of the outer side wall of the control box, which corresponds to the mounting plane, is provided with a plurality of radiating fins 1.3. The chip is close to the chip mounting plane. The anti-loosening chip pressing structure 4 comprises an elastic pressing sheet 4.1, and the elastic pressing sheet is arranged in the control box and used for pressing one side face of the chip on a chip mounting plane. In this embodiment, the gap between the chip mounting plane and the side surface of the chip is filled with heat-conducting silica gel; the control box is made of metal, such as aluminum alloy.
The external rotor electric machine of this embodiment compresses tightly a side of chip on the chip mounting plane through the elasticity preforming, and the lateral wall at the control box is equipped with a plurality of radiating fin with the position that the mounting plane corresponds on the surface, so, calorific capacity in the chip working process can distribute the release through the lateral wall and the radiating fin of control box, thereby distribute the release through as short as possible heat conduction way and heat conduction area as big as possible, in order to strengthen the radiating effect, the radiating effect with the controller that can effectively solve external rotor electric machine among the prior art is not good, can influence chip operational reliability and life's problem.
Specifically, the stator shell further comprises a box cover 1.2 used for sealing and covering a box opening of the control box 1.1, and the box cover is fixed on the control box through a bolt and used for sealing and covering the box opening of the control box.
Further, as shown in fig. 1, 2 and 3, a step surface 1.5 is provided between the top of the chip mounting plane 1.4 and the inner side wall surface of the control box. In this embodiment, the step surface is parallel to the bottom surface of the control box. Locking chip compact structure 4 that moves still includes the preforming installation slot 4.2, the spacing post hole 4.3 of setting on the step face, the connection screw 4.4 and the spacing bolt 4.5 of setting on the bottom surface in spacing post hole of setting on the chip mounting plane upper portion. The limiting column hole is intersected with the pressing sheet installation slot. The limiting post holes comprise upper limiting holes 4.31 positioned above the pressing sheet installation slot and lower limiting holes 4.32 positioned below the pressing sheet installation slot. The connecting screw hole is arranged on the bottom surface of the lower limiting hole. The limiting bolt comprises a limiting column 4.51 matched with the limiting column hole and a screw rod 4.52 arranged at the lower end of the limiting column. The elastic pressing sheet comprises a mounting inserting sheet 4.11 and an elastic pressing sheet 4.12 used for pressing the chip. The mounting insertion piece is provided with an insertion piece limiting hole matched with the limiting column. The installation inserting sheet is inserted in the pressing sheet installation slot. The limiting column sequentially penetrates through the upper limiting hole and the inserting sheet limiting hole and extends into the lower limiting hole. The screw rod is matched with the connecting screw hole. The elastic pressing sheet presses one side face of the chip on the chip mounting plane. In this embodiment, the lower end of the limiting column is close to the bottom surface of the lower limiting hole.
The installation inserted sheet of elasticity preforming is inserted and is established in preforming installation slot, and spacing post passes spacing hole of last spacing hole and inserted sheet in proper order and stretches into down in the spacing hole to make elasticity compressing tightly the piece compress tightly a side of chip on chip mounting surface.
Because the motor can frequently generate vibration in the working process, if the elastic pressing sheet is directly locked and fixed on the inner side wall of the control box by adopting a common bolt, the elastic pressing sheet is easy to loosen due to the loosening of the bolt, the side surface of the chip can not be pressed on the chip mounting plane,
locking chip compact structure that moves leads to compressing tightly and appearing the clearance between the chip mounting plane, and the calorific capacity in the chip course of operation can't be quick gives off the release through the lateral wall and the radiating fin of control box, influences chip operational reliability and life's problem. In order to solve the problem, the anti-loosening chip pressing structure is arranged, even if bolts generated due to working vibration of a motor are loosened, the elastic pressing piece is not influenced to press one side face of a chip on a chip mounting plane, and the elastic pressing piece is guaranteed to press one side face of the chip on the chip mounting plane, so that heat generated in the working process of the chip is rapidly dissipated and released through the side wall of a control box and a heat dissipation fin; the screw rod of the limiting bolt is matched with the connecting screw hole and is only used for ensuring that the limiting column passes through the inserting sheet limiting hole and preventing the limiting column from falling off the inserting sheet limiting hole; so, even the screw rod that spacing bolt appears is not hard up, as long as spacing post keeps passing the spacing hole of inserted sheet, just can guarantee that elasticity compressing tightly the piece compresses tightly a side of chip on chip mounting surface, and the not hard up axial displacement of the spacing bolt that causes of screw rod is generally very little, therefore even the screw rod is not hard up, also can guarantee that spacing post keeps passing the spacing hole of inserted sheet, therefore can effectively solve because of the bolt is not hard up, and lead to compressing tightly and the problem that the clearance appears between the chip mounting surface.
The second embodiment is the same as the first embodiment, except that,
as shown in fig. 4, the mounting insertion piece 4.11 and the elastic pressing piece 4.12 are integrally formed by bending. The elastic pressing piece 4.12 is N-shaped and comprises a vertical supporting piece 4.121 with the upper end connected with the installation inserting piece, an elastic connecting piece 4.122 formed by bending the lower end of the vertical supporting piece upwards and an elastic pressing piece 4.123 formed by bending the upper end of the elastic connecting piece downwards. The elastic pressing sheet, the elastic connecting sheet and the mounting insertion sheet are positioned on the same side of the vertical supporting sheet. The thickness of elasticity support piece, elastic connection piece and vertical backing sheet reduces in proper order.
Before the elastic pressing sheet is installed on the control box, the installation inserting sheet is perpendicular to the vertical supporting sheet, the included angle between the elastic pressing sheet and the installation inserting sheet is 85-89 degrees, and the lower portion of the elastic pressing sheet inclines towards the direction far away from the vertical supporting sheet.
In the process of installing the elastic pressing sheet on the control box, the installation inserting sheet is inserted into the pressing sheet installation slot until the end part of the installation inserting sheet is abutted against the inner end face of the pressing sheet installation slot, in the process, the lower end of the elastic abutting sheet is abutted against the side face of the chip firstly, and one side face of the chip is pressed on the chip installation plane; then, the upper end of the elastic pressing sheet is close to and pressed against the side surface of the chip, so that the surface of the elastic pressing sheet is completely tightly attached to the side surface of the chip; and then, the end part of the mounting inserting sheet is propped against the inner end surface of the pressing sheet mounting slot.
Because the included angle between the elastic pressing sheet and the installation inserting sheet is 85-89 degrees, the lower end of the elastic pressing sheet can be firstly pressed against the side surface of the chip and the side surface of the chip is pressed against the chip installation plane in the process of installing the elastic pressing sheet on the control box; the thicknesses of the elastic pressing sheet, the elastic connecting sheet and the vertical supporting sheet are sequentially reduced, so that the elastic pressing sheet is deformed firstly after the lower end of the elastic pressing sheet is pressed against the side surface of the chip firstly, so that the upper end of the elastic pressing sheet is close to and pressed against the side surface of the chip, and the surface of the elastic pressing sheet is completely tightly attached to the side surface of the chip; after that, the elastic connecting piece is deforming to realize not influencing under the condition that the elastic pressing piece compresses tightly a side of the chip on the chip mounting plane, guarantee that the elasticity of the elastic pressing piece supports the surface of the pressing piece and hugs closely at the chip completely.
When the tip of installation inserted sheet supported on the interior terminal surface of preforming installation slot, the spacing hole of inserted sheet was aligned with spacing post hole, then, passed spacing post in proper order and go up spacing hole of spacing hole and inserted sheet and stretch into down spacing downthehole, screw rod and connection screw cooperation.
So, can not influence under the condition that the elasticity preforming compresses tightly the side of chip on the chip mounting plane, guarantee that the elasticity of elasticity pressing piece supports the surface of preforming and hugs closely on chip another side completely to calorific capacity in making the chip working process can also give off the release through the lateral wall that the elasticity preforming (elasticity preforming is the shaping of bending as an organic whole) transmitted the control box, gives off release calorific capacity through the heat conduction way as short as possible, further reinforcing radiating effect.
In this embodiment, the surface of the chip towards the elastic pressing piece is coated with a heat conduction silica gel layer, so that the elastic pressing piece and the chip are filled with the heat conduction silica gel.
And the clearance between the pressing sheet installation slot and the installation inserting sheet is filled with heat-conducting silica gel.
The elastic pressing sheet is made of metal material, such as spring steel.
In a third embodiment, the remaining structure of this embodiment refers to the first or second embodiment, but the difference is that,
as shown in fig. 5 and 6, the outer rotor motor capable of enhancing heat dissipation further includes a rotor case 5 and a rotor fixedly disposed in the rotor case. The rotor shell and the control box are oppositely distributed in the axial direction of the outer rotor motor. The rotor housing is provided with a centrifugal wind wheel 6 towards one end of the control box, and an air inlet 6.1 of the centrifugal wind wheel faces the control box. When the rotor rotates, the centrifugal wind wheel sucks the cold air around by utilizing centrifugal force, radial air outlet and axial air inlet, thereby forming cooling circulation to the control box and further improving the heat dissipation effect of the control box.
Further, as shown in fig. 5, 6, and 7, a plurality of rib plates 7 equally distributed around the circumference of the rotating shaft of the outer rotor motor are arranged on one end surface of the control box 1.1 facing the centrifugal wind wheel, and a space between any two adjacent rib plates forms a radial air guiding groove 8 extending along the radial direction of the rotating shaft of the outer rotor motor. So, when the rotor was rotatory, centrifugal wind wheel inspiratory cold air will get into centrifugal wind wheel's air intake through radial wind-guiding groove, is favorable to cold air radial introduction to improve the radiating effect of control box.
Further, as shown in fig. 7, a part of the radial air guiding grooves is linear radial air guiding grooves, and another part of the radial air guiding grooves is wavy linear radial air guiding grooves. Therefore, the path of cold air passing through the radial air guide groove can be prolonged through the wave line type radial air guide groove, so as to improve the heat dissipation effect of the control box,
further, the centrifugal wind wheel is installed at one end of the rotor shell through a bolt. Therefore, the centrifugal wind wheel is convenient to mount and dismount.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and all simple modifications, alterations and equivalents of the above embodiments according to the technical spirit of the present invention are still within the protection scope of the technical solution of the present invention.
Claims (10)
1. The utility model provides a can strengthen radiating external rotor electric machine, includes stator housing, and stator housing includes the control box, is equipped with automatically controlled board and sets up the chip on automatically controlled board in the control box, and characterized by still includes locking chip compact structure that moves, include a chip mounting plane in the inside wall surface of control box at least, the lateral wall of control box is equipped with a plurality of radiating fin with the position that mounting plane corresponds on the surface, the chip is close to chip mounting plane, locking chip compact structure that moves includes the elasticity preforming, the elasticity preforming sets up in the control box for compress tightly a side of chip on chip mounting plane.
2. The external rotor electric machine capable of enhancing heat dissipation of claim 1, wherein a step surface is provided between the top of the chip mounting plane and the inner sidewall surface of the control box, the chip pressing structure further comprises a pressing sheet mounting slot provided at the upper portion of the chip mounting plane, a limit post hole provided at the step surface, a connection screw hole and a limit bolt provided at the bottom surface of the limit post hole,
the limiting post hole is intersected with the pressing sheet mounting slot, the limiting post hole comprises an upper limiting hole positioned above the pressing sheet mounting slot and a lower limiting hole positioned below the pressing sheet mounting slot, the connecting screw hole is arranged on the bottom surface of the lower limiting hole,
the limiting bolt comprises a limiting column matched with the limiting column hole and a screw arranged at the lower end of the limiting column,
the elastic pressing sheet comprises an installation inserting sheet and an elastic pressing sheet used for pressing the chip, wherein the installation inserting sheet is provided with an inserting sheet limiting hole matched with a limiting column, the installation inserting sheet is inserted into the pressing sheet installation slot, the limiting column sequentially penetrates through the upper limiting hole and the inserting sheet limiting hole and stretches into the lower limiting hole, the screw rod is matched with the connection screw hole, and one side face of the chip is pressed on the chip installation plane by the elastic pressing sheet.
3. The external rotor electric machine capable of enhancing heat dissipation of claim 2, wherein the mounting insertion pieces and the elastic pressing pieces are integrally formed by bending.
4. The external rotor motor capable of enhancing heat dissipation of claim 3, wherein the elastic pressing piece is N-shaped and comprises a vertical supporting piece with an upper end connected with the installation inserting piece, an elastic connecting piece formed by bending the lower end of the vertical supporting piece upwards and an elastic pressing piece formed by bending the upper end of the elastic connecting piece downwards, the elastic pressing piece, the elastic connecting piece and the installation inserting piece are positioned on the same side of the vertical supporting piece, the thicknesses of the elastic pressing piece, the elastic connecting piece and the vertical supporting piece are sequentially reduced,
before the elastic pressing sheet is installed on the control box, the installation inserting sheet is perpendicular to the vertical supporting sheet, the included angle between the elastic pressing sheet and the installation inserting sheet is 85-89 degrees, and the lower part of the elastic pressing sheet inclines towards the direction far away from the vertical supporting sheet;
in the process of installing the elastic pressing sheet on the control box, the installation inserting sheet is inserted into the pressing sheet installation slot until the end part of the installation inserting sheet is abutted against the inner end face of the pressing sheet installation slot, in the process, the lower end of the elastic abutting sheet is abutted against the side face of the chip firstly, and one side face of the chip is pressed on the chip installation plane; then, the upper end of the elastic pressing sheet is close to and pressed against the side surface of the chip, so that the surface of the elastic pressing sheet is completely tightly attached to the side surface of the chip; then, the end part of the mounting inserting sheet is abutted against the inner end surface of the pressing sheet mounting slot;
when the tip of installation inserted sheet supported on the interior terminal surface of preforming installation slot, the spacing hole of inserted sheet was aligned with spacing post hole, then, passed spacing post in proper order and go up spacing hole of spacing hole and inserted sheet and stretch into down spacing downthehole, screw rod and connection screw cooperation.
5. The external rotor electric machine capable of enhancing heat dissipation of claim 2, 3 or 4, wherein the gap between the tablet mounting slot and the mounting tab is filled with heat-conducting silica gel.
6. The external rotor electric machine capable of enhancing heat dissipation of claim 1, 2, 3 or 4, wherein the gap between the chip mounting plane and the side surface of the chip is filled with heat conductive silicone.
7. The external rotor motor capable of enhancing heat dissipation according to claim 1, 2, 3 or 4, further comprising a rotor housing and a rotor fixedly disposed in the rotor housing, wherein the rotor housing and the control box are relatively distributed in the axial direction of the external rotor motor, a centrifugal wind wheel is disposed at one end of the rotor housing facing the control box, and an air inlet of the centrifugal wind wheel faces the control box.
8. The external rotor motor capable of enhancing heat dissipation according to claim 7, wherein a plurality of convex rib plates equally distributed around the circumference of the rotating shaft of the external rotor motor are arranged on one end of the control box facing the centrifugal wind wheel, a space between any two adjacent convex rib plates forms a radial air guiding groove, and the radial air guiding groove extends along the radial direction of the rotating shaft of the external rotor motor.
9. The external rotor electric machine capable of enhancing heat dissipation of claim 8, wherein a portion of the radial air guiding grooves are linear radial air guiding grooves, and another portion of the radial air guiding grooves are wavy linear radial air guiding grooves.
10. The external rotor electric machine capable of enhancing heat dissipation of claim 7, wherein the centrifugal wind wheel is mounted on one end of the rotor housing by bolts.
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| CN202110736232.3A CN113541407B (en) | 2021-06-30 | 2021-06-30 | External rotor motor capable of enhancing heat dissipation |
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| CN202110736232.3A CN113541407B (en) | 2021-06-30 | 2021-06-30 | External rotor motor capable of enhancing heat dissipation |
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| CN113541407B (en) | 2022-06-10 |
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