JP5330495B2 - motor - Google Patents

Description

  The present invention relates to a motor, and more particularly to a motor having a heat dissipation structure.

  Each of Patent Documents 1 to 4 discloses a motor that has a fan driven by a drive shaft and accelerates heat dissipation so as to accelerate the air flow in the motor housing. However, since the air flow path by the driven fan passes through the motor housing, dust accumulates in the rotor, especially in the motor, which adversely affects the rotation and heat dissipation of the motor and damages the components in the motor housing. There is.

  Patent Document 5 discloses a motor that uses a heat pipe to improve the heat dissipation effect. However, since the motor shaft itself is hollow and the working medium is circulated therein, the strength of the shaft structure is increased. Therefore, there is a problem that the rotational force of the motor shaft must be reduced to avoid breakage of the shaft. In addition, although heat from the motor shaft can be dissipated by a heat pipe provided inside the motor shaft, it is difficult to dissipate heat from the periphery away from the motor shaft. The heat storage also causes damage to the laminated member of the motor.

Taiwan Utility Model No. M331251 Specification Taiwan Utility Model No. M322676 Taiwan Utility Model No. M300395 Specification Taiwan Patent No. I250718 Specification U.S. Pat. No. 4,406,959

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a motor that keeps the structural strength of the motor shaft strong and improves the heat dissipation effect.

  In order to achieve the above object, a motor according to the present invention includes a shaft extending along a predetermined axial direction, a heat conducting member in which the shaft is inserted so as to cover the shaft, and the axial direction. A plurality of extending heat pipes, and a magnetic member disposed around the shaft and provided annularly on the inner peripheral surface of the heat conducting member, the shaft being surrounded by the heat conducting member An intermediate portion, a first extending portion extending along the axial direction following the one axial end side of the intermediate portion, and a second extending from the other end side of the intermediate portion and having a larger diameter than the intermediate portion. Each of the heat pipes extends to the inside of the heat conduction member, and the second extension portion is connected to the first heat conduction portion. A rotor means having a second heat conducting portion protruding further, and covering the magnetic member A housing provided with a rotatable shaft; a core that surrounds the magnetic member and provided on an inner peripheral surface of the housing; a plurality of protrusions that project from the core toward the magnetic member; and the protrusions Winding means having a plurality of coils wound around each of the winding means, and impeller means covering the second heat conducting portion and connected to the second extending portion along the axial direction. A motor is provided.

  According to the configuration of the motor according to the present invention, the heat conduction path from the heat conducting member to the heat pipe can be effectively shortened, and it is difficult to dissipate heat from the peripheral portion away from the motor shaft as in the prior art. A point can be eliminated and the heat dissipation effect can be improved. Further, since the motor shaft is not made hollow as in the prior art, the structural strength can be kept strong, and it is not necessary to reduce the rotational force of the motor shaft. In addition, since an appropriate number of heat pipes can be provided according to the heat generated by the heat conducting member, the heat dissipation effect can be further obtained.

1 is an exploded perspective view showing an embodiment of a motor according to the present invention. It is a disassembled perspective view which shows the structure of the rotor means in the motor which concerns on this invention. It is an assembly sectional view of the motor of FIG. It is a disassembled perspective view which shows other embodiment of the motor which concerns on this invention. FIG. 5 is an assembly sectional view of the motor of FIG. 4.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

Example 1
1 to 3 show a configuration of an embodiment of a motor according to the present invention. The motor 200 includes a rotor unit 20, a housing 30, a winding unit 40, an impeller unit 50, and a cap 60.

  As shown in FIG. 1, the rotor means 20 includes a shaft 21 extending along a predetermined axial direction X, a heat conducting member 22 in which the shaft 21 is inserted so as to cover the shaft 21, and the axial direction X. And a plurality of heat pipes 23 extending around the shaft 21 and a magnetic member 24 provided in an annular shape on the inner peripheral surface of the heat conducting member 22. In this example, the rotor means 20 is further provided with fixing plates 241 and 241 along the axial direction X at both ends of the heat conducting member 22 in the axial direction X.

  The shaft 21 includes an intermediate portion 211 surrounded by the heat conducting member 22, a first extending portion 212 extending along the axial direction X following the axial direction X one end side of the intermediate portion 211, and the other end of the intermediate portion 211. And a second extending portion 213 extending along the axial direction X from the side and having a diameter larger than that of the intermediate portion 211.

  The heat conducting member 22 is made of a magnetically permeable material, and is made of silicon steel as an example.

  Each of the heat pipes 23 extends in the heat conduction member 22 and is provided with a first heat conduction part 231 and a second heat connection part 231 connected to the first heat conduction part 231 and protruding from the second extension part 213. And a heat conducting portion 232.

  The magnetic member 24 includes a plurality of magnets 242 between the two fixing plates 241 and 241 that are closely provided on the inner peripheral surface of the heat conducting member 22 at a predetermined interval around the axial direction X.

  The housing 30 covers the magnetic member 24 and the shaft 21 is rotatably provided. In the housing 30, at least one heat exchange passage 32 is provided around the winding means 40. In this example, a plurality of heat exchange passages 32 are provided.

  The housing 30 includes a peripheral wall portion 311 provided so as to surround the magnetic member 24, a first end cap 312 connected to one end of the peripheral wall portion 311 and having a first extending portion 212 pivoted thereto, The peripheral wall portion 311 is connected to the other end of the peripheral wall portion 311 and extends along the axial direction X at a predetermined interval from the second end cap 313 to which the second extending portion 213 is pivotally connected. And a plurality of fins 314, 314,.

  In this example, the heat exchange passage 32 is defined by two adjacent fins 314 and 314 in the plurality of fins 314 and the outer peripheral surface of the peripheral wall portion 311.

  The winding means 40 includes a core 41 that is provided on the inner peripheral surface of the housing 30 so as to surround the magnetic member 24, and a plurality of protrusions 42, 42,... That protrude from the core 41 toward the magnetic member 24. And a plurality of coils 43 wound around each of the protrusions 42.

  In this example, the motor 200 is further provided with a heat conductive paste 44 that covers the surface of the coil 43 and fills the gap between the coil 43 and the housing 30. The heat conductive paste 44 is formed by mixing a resin and a heat conductive material selected from silicon carbide, aluminum, boron nitride, aluminum nitride, and combinations thereof.

  The first end cap 312 is formed with a first bearing hole 3121 in which the shaft 21 is arranged correspondingly, and a plurality of through holes 3122 in which each of the plurality of coils 43 is arranged correspondingly. One end of each of the plurality of coils 43 is passed through the corresponding through hole 3122.

  The second end cap 313 is provided with a second bearing hole 3131 corresponding to the shaft 21 and the first bearing hole 3121.

  The impeller means 50 surrounds the second heat conducting portion 232 and is connected to the second extending portion 213 along the axial direction X.

  The cap 60 defines a space 62 that covers the impeller means 50 and is connected to the other end side of the peripheral wall portion 311. In this example, the cap 60 includes a plurality of inlets 61, 61, communicated with the heat exchange passage 32. ... are provided.

  With the above configuration, each of the first heat conducting portions 231 of the heat pipe 23 is disposed so as to extend inside the heat conducting member 22, so that the heat generated by the heat conducting member 22 due to the operation of the motor 200 is the first heat. Conduction is conducted to the second heat conducting unit 232 through the conducting unit 231. Then, the heat is transmitted to the impeller means 50 through the second heat conducting portion 232 and is dissipated.

  Therefore, in the motor 200 according to the present invention, since the heat conduction path from the heat conducting member 22 to the heat pipe 23 is effectively shortened, it is difficult to dissipate heat around the motor shaft as in the prior art. The problem can be solved and the heat dissipation effect can be improved.

  Further, since the motor 200 according to the present invention does not have a hollow motor shaft as in the prior art, the structural strength of the shaft 21 can be kept strong, and the rotational force of the shaft 21 needs to be reduced. Absent.

  In addition, when heat generation by the heat conducting member 22 is high, an appropriate number of heat pipes 23 can be provided in order to obtain a good heat dissipation effect. Thereby, the damage that the magnetism of the heat conductive member 22 is erase | eliminated by high temperature can be prevented.

(Example 2)
4 to 5 show the configuration of another embodiment of the motor according to the present invention. In addition, about the component which has the same structure and function as the said example, the same number is attached | subjected and the description is abbreviate | omitted.

  The housing 30 is made of a metal material, and further includes two metal sleeve rings 33 and 33 into which both end portions of the shaft 21 are inserted and the both end portions of the winding means 40 are respectively fitted and contacted.

  The sleeve rings 33 and 33 are formed with flange portions 332 and 332 with both end edges projecting outward in a direction perpendicular to the axial direction X, and an outer peripheral surface surrounded by the flange portions 332 and 332 is a shaft. A flow surface 331 is formed inwardly in the direction X.

  In the housing 30, two heat exchange passages 32, 32 are defined by the inner peripheral surface of the housing 30 and the flow surface 331, and the cross section of the heat exchange passage 32 is formed in a C shape, for example.

  The peripheral wall portion 311 and the through holes 315, 315,... Spatially communicating with each other on both end sides corresponding to the heat exchange passages 32, along the axial direction with a predetermined interval in the circumferential direction. Ribs 317, 317,. In this embodiment, four communication holes 315 are provided.

  In this example, when the inlet tube 91, the connection tube 92, and the outlet tube 93 are used for connection through the through holes 315, 315,. The two heat exchange passages 32 flow from one end side to the other end side, are guided to another heat exchange passage 32 through the connection tube 92, and flow from the outlet tube 93 through the heat exchange passage 32. In this way, the heat generated by the winding means 40 can be dissipated.

  At the same time, heat generated by the heat conducting member 22 is conducted to the impeller means 50 by the heat pipe 23, and is discharged from the flow grooves 316, 316, ... by the air flow by the impeller means 50.

  As described above, the motor 200 according to the present invention can release the heat generated by the heat conducting member 22 by the heat pipe 23 and can radiate the heat generated by the winding means 40 by the heat radiating medium. Therefore, the motor 200 according to the present invention can obtain a higher heat dissipation effect.

200 motor 20 rotor means 21 shaft 211 intermediate part 212 first extension part 213 second extension part 22 heat conduction member 23 heat pipe 231 first heat conduction part 232 second heat conduction part 24 magnetic member 241 fixing plate 242 Magnet 30 Housing 311 Peripheral wall portion 312 First end cap 3121 First bearing hole 3122 Through hole 313 Second end cap 3131 Second bearing hole 314 Fin 315 Through hole 316 Flow groove 317 Rib 32 Heat exchange passage 33 Sleeve ring 331 Flow surface 332 Flange 40 Winding means 41 Core 42 Protrusion 43 Coil 44 Thermal conductive paste 50 Impeller means 60 Cap 61 Inlet 62 Space 91 Inlet tube 92 Connection tube 93 Outlet tube X Direction

Claims (9)

An axis extending along a predetermined axial direction, a heat conducting member in which the axis is inserted so as to cover the axis, a plurality of heat pipes extending along the axial direction, and a circumference of the axis And a magnetic member provided in an annular shape on the inner peripheral surface of the heat conducting member, and the shaft follows an intermediate portion surrounded by the heat conducting member and one axial end side of the intermediate portion. A first extending portion extending along the axial direction; and a second extending portion extending continuously from the other end side of the intermediate portion and having a diameter larger than that of the intermediate portion. Rotor means having a first heat conducting portion provided extending inside the heat conducting member, and a second heat conducting portion projecting from the second extending portion connected to the first heat conducting portion. When,
A housing that covers the magnetic member and is rotatably provided with the shaft;
A core that surrounds the magnetic member and is provided on the inner peripheral surface of the housing; a plurality of protrusions that project from the core toward the magnetic member; and a plurality of coils wound around each of the protrusions. Winding means having,
The motor comprising: impeller means that covers the second heat conducting portion and is connected to the second extending portion along the axial direction.   The motor according to claim 1, wherein at least one heat exchange passage is provided around the winding means in the housing. A plurality of the heat exchange passages are provided,
The housing includes a peripheral wall provided so as to surround the magnetic member, a first end cap coupled to one end of the peripheral wall and the first extending portion being pivoted, and the peripheral wall A second end cap connected to the other end of the portion and pivotally connected to the second extending portion, and provided on the peripheral wall portion so as to extend along the axial direction at a predetermined interval from each other. A plurality of fins, and
The heat exchange passage is defined by two adjacent fins in the plurality of fins and an outer peripheral surface of the peripheral wall portion,
The first end cap is formed with a first bearing hole in which the shaft is arranged correspondingly and a plurality of through holes in which the plurality of coils are arranged correspondingly,
The second end cap is provided with a second bearing hole corresponding to the shaft and the first bearing hole,
Each of the plurality of coils is passed through the corresponding through hole at one end portion thereof,
The motor has a cap provided therein with a heat conductive paste, defining a space covering the impeller means and connected to the other end of the peripheral wall portion,
The motor according to claim 2, wherein the cap includes a plurality of inlets communicating with the heat exchange passage. The housing is made of a metal material, and has two sleeve rings into which both end portions of the shaft are inserted, respectively.
The sleeve ring is formed as a flow surface with both end edges projecting outward perpendicularly to the axial direction to form a flange portion, and the outer peripheral surface surrounded by the flange portion is recessed inward,
Two heat exchange passages are formed by the inner peripheral surface of the housing and the flow surface;
The motor according to claim 2, wherein the housing is provided with four through holes communicating with both ends of the heat exchange passage.   The motor according to claim 4, wherein the heat exchange passage has a C-shaped cross section. The housing includes a peripheral wall provided so as to surround the magnetic member, a first end cap connected to one end of the peripheral wall, and a second end cap connected to the other end of the peripheral wall. And having
The through hole is provided through the peripheral wall,
The first end cap is formed with a first bearing hole in which the shaft is arranged correspondingly and a plurality of through holes in which the plurality of coils are arranged correspondingly,
Each of the plurality of coils is passed through the corresponding through hole at one end portion thereof,
The second end cap is provided with a second bearing hole corresponding to the shaft and the first bearing hole,
The motor according to claim 4, wherein the two heat exchange passages are formed by an inner peripheral surface of the peripheral wall portion and the flow surface. The rotor means is further provided with fixing plates on both end sides of the heat conducting member along the axial direction,
The heat conducting member is formed using a magnetically permeable material,
2. The magnetic member according to claim 1, wherein the magnetic member includes a plurality of magnets provided on an inner peripheral surface of the heat conducting member at a predetermined interval around the axial direction between the two fixing plates. The motor described.   The motor according to claim 1, further comprising a heat conductive paste that covers a surface of the coil and fills a gap between the coil and the housing.   9. The motor according to claim 8, wherein the heat conductive paste is made of a resin and a heat conductive material selected from silicon carbide, aluminum, boron nitride, aluminum nitride, and combinations thereof.