JP6080512B2 - Driver integrated motor - Google Patents

Description

  The present invention relates to a driver integrated motor in which a motor body and a driver are integrated.

  2. Description of the Related Art Conventionally, a driver-integrated motor in which a motor body and a driver are integrated is known (see, for example, Patent Document 1). In the driver integrated motor described in Patent Document 1, the driver unit includes a circuit board on which electronic components such as a power transistor are mounted, and a case body in which the circuit board is accommodated. In this driver-integrated motor, the motor main body and the driver are connected via a support column, and a gap is formed between the motor main body and the driver. Therefore, in this driver-integrated motor, heat transfer between the motor body and the driver is suppressed.

JP 2004-201415 A

  If the temperature of the electronic component mounted on the circuit board exceeds the allowable temperature, the electronic component may not function normally, so it is necessary to suppress the temperature rise of the electronic component. In the driver-integrated motor of Patent Document 1, heat transfer between the motor main body and the driver is suppressed, so that it is possible to suppress the temperature rise of electronic components due to the heat generated in the motor main body. is there. However, in this driver-integrated motor, the heat generated in the driver section cannot be efficiently released to the motor main body section, so it is difficult to suppress the temperature rise of the electronic components due to the heat generated in the driver section. is there.

  Therefore, an object of the present invention is to suppress the temperature rise caused by the heat generated in the motor main body portion and the temperature rise caused by the heat generated in the driver portion of the electronic component mounted on the circuit board. The object is to provide a driver integrated motor.

In order to solve the above-described problems, a driver-integrated motor according to the present invention includes a motor body having a rotor and a stator, a circuit board on which a drive circuit for driving the rotor is mounted, and a circuit board in which the circuit board is accommodated. The motor main body and the first case body are fixed to each other via a first sealing member formed of an elastic material having a heat insulating property. The first divided case body and the second divided case body are divided by a predetermined joining surface, and the first divided case body and the second divided case body include the first divided case body and the second divided case body. The motor main body is fixed to each other via a second seal member that is formed as a separate body and is formed of an elastic material having thermal conductivity and is sandwiched between the first divided case body and the second divided case body. , The first seal member And includes a case body fixing member fixed to the first case body, the case body fixing member is characterized by being formed of a resin material having a heat insulating property.

  In the driver-integrated motor of the present invention, the motor main body and the first case body are fixed to each other via a first seal member formed of an elastic material having heat insulation properties. Therefore, in the present invention, it is possible to suppress the heat generated in the motor main body from being transmitted to the driver, and as a result, the heat generated in the motor main body of the electronic component mounted on the circuit board. It is possible to suppress the temperature rise caused by the phenomenon. Moreover, in this invention, the 1st division | segmentation case body and the 2nd division | segmentation case body which comprise a 1st case body are mutually fixed via the 2nd sealing member formed with the elastic material which has thermal conductivity. Therefore, it is possible to efficiently dissipate the heat generated in the driver portion by using the first divided case body and the second divided case body constituting the first case body. Therefore, in this invention, it becomes possible to suppress the temperature rise resulting from the heat which generate | occur | produced in the driver part of the electronic component mounted in a circuit board. As described above, according to the present invention, it is possible to suppress the temperature rise caused by the heat generated in the motor main body portion and the temperature rise caused by the heat generated in the driver portion of the electronic component mounted on the circuit board. Become.

In the present invention, since the first case body includes the first divided case body and the second divided case body that are divided at a predetermined joining surface, for example, the shape of the first case body is complicated. However, the first case body can be easily manufactured. In the present invention, since the motor main body and the first case body are fixed to each other via the first seal member formed of an elastic material, the driver is interposed between the motor main body and the first case body. It becomes possible to prevent water, dust, and the like from entering the integrated motor. Similarly, in the present invention, since the first divided case body and the second divided case body are fixed to each other via the second seal member formed of an elastic material, the first divided case body and the second divided case body It becomes possible to prevent water, dust, and the like from entering between the case body and the inside of the first case body. Therefore, according to the present invention, it is possible to improve the waterproofness and dustproofness of the driver-integrated motor. In the present invention, the motor body includes a case body fixing member that is fixed to the first case body via the first seal member, and the case body fixing member is formed of a resin material having heat insulation properties. Yes. Therefore, it is possible to effectively suppress the heat generated in the motor main body from being transmitted to the driver unit. As a result, the heat generated in the motor main body of the electronic component mounted on the circuit board can be reduced. The resulting temperature rise can be effectively suppressed.

  In the present invention, the circuit board is preferably accommodated in the first case body so as to be in contact with the first divided case body. If comprised in this way, it will become possible to transmit the heat which generate | occur | produced in the circuit board to a 1st division | segmentation case body, a 2nd sealing member, and a 2nd division | segmentation case body in this order, and to dissipate efficiently.

  In the present invention, the driver integrated motor includes a communication substrate for communicating with a higher circuit board of a host device on which the driver integrated motor is mounted and a second case body in which the communication substrate is accommodated. The motor body part and the driver part are arranged so as to overlap in the axial direction of the rotor, and the motor body part and the upper communication part are arranged so as to overlap in the radial direction of the rotor, and the first case body The second case body is preferably fixed to each other via a third seal member formed of an elastic material having thermal conductivity. If comprised in this way, it will become easy to transmit heat from a 1st case body to a 2nd case body. Therefore, it is possible to effectively dissipate the heat generated in the driver unit by using the second case body, and as a result, the electronic component mounted on the circuit board is caused by the heat generated in the driver unit. It is possible to effectively suppress the temperature rise. Moreover, since it comprises in this way, a 1st case body and a 2nd case body are mutually fixed via the 3rd sealing member, Therefore It is a driver integrated type from between a 1st case body and a 2nd case body. It becomes possible to prevent water and dust from entering the motor. Furthermore, if comprised in this way, since it arrange | positions so that a motor main-body part and a high-order communication part may overlap in the radial direction of a rotor, it becomes possible to reduce a driver integrated motor in the axial direction of a rotor. .

  In the present invention, it is preferable that a fin for heat dissipation is formed in the second case body. If comprised in this way, it will become possible to dissipate the heat | fever which generate | occur | produced in the driver part more effectively using the 2nd case body, As a result, in the driver part of the electronic component mounted in a circuit board It is possible to more effectively suppress the temperature rise caused by the generated heat.

  In the present invention, the second case body includes a third divided case body and a fourth divided case body that are divided at a predetermined joining surface, and the third divided case body and the fourth divided case body are thermally conductive. It is preferable that they are fixed to each other via a fourth seal member formed of an elastic material having the following. If comprised in this way, even if the shape of a 2nd case body is complicated, for example, it will become possible to manufacture a 2nd case body easily. Moreover, since it comprises in this way, since a 3rd division | segmentation case body and a 4th division | segmentation case body are mutually fixed via the 4th sealing member formed with the elastic material which has heat conductivity, 2nd Even when the case body includes the third divided case body and the fourth divided case body, the third divided case body and the fourth divided case body constituting the second case body are used to It is possible to efficiently dissipate heat transferred from the one case body to the second case body. Moreover, since it comprises in this way and a 3rd division | segmentation case body and a 4th division | segmentation case body are mutually fixed via the 4th sealing member, between a 3rd division | segmentation case body and a 4th division | segmentation case body. Thus, it is possible to prevent water, dust, and the like from entering the inside of the second case body.

  In the present invention, the first case body fixing portion which is a portion fixed to the second case body of the first case body or the second case which is a portion fixed to the first case body of the second case body. One of the body fixing portions is formed with a convex portion protruding toward the other of the first case body fixing portion or the second case body fixing portion, and is fixed to the first case body fixing portion or the second case body. It is preferable that a concave portion with which the convex portion is engaged is formed on either one of the portions, and a third seal member is sandwiched between the tip surface of the convex portion and the bottom surface of the concave portion. If comprised in this way, it will become possible to prevent effectively that water, dust, etc. enter into the inside of a driver integrated motor from between the 1st case body and the 2nd case body.

  In the present invention, a first case body fixing portion which is a portion fixed to the second case body of the first case body, and a second case which is a portion fixed to the first case body of the second case body. In the body fixing portion, a first passage hole through which a power supply cable connected to the circuit board is passed is formed in a size corresponding to the outer diameter of the power supply cable, and communication connected to the circuit board is performed. It is preferable that the second passage hole through which the communication cable is passed is formed in a size corresponding to the outer diameter of the communication cable. If comprised in this way, it will become possible to make the magnitude | size of a 1st passage hole into the minimum magnitude | size required for letting a power supply cable pass, and the magnitude | size of a 2nd passage hole is made into a communication cable. It becomes possible to make it the minimum size necessary for passing it through. Therefore, the contact area between the first case body fixing part and the third seal member and the contact area between the second case body fixing part and the third seal member can be increased. As a result, heat can be efficiently transferred from the first case body to the second case body, and the heat generated in the driver section can be effectively dissipated.

  In the present invention, the motor main body preferably includes a detection mechanism for detecting the rotational position of the rotor, and a part of the detection mechanism is preferably fixed to the case body fixing member. If comprised in this way, it will become possible to simplify the structure of a motor main-body part compared with the case where the member to which a part of detection mechanism is fixed is provided separately.

  In the present invention, the motor main body portion and the driver portion are arranged so as to overlap in the axial direction of the rotor, and the motor fixing portion which is a portion fixed to the motor main body portion of the first case body is viewed from the axial direction. It is preferable that the shape at the time is a frame shape. If comprised in this way, it will become possible to make small the contact area of a motor fixing | fixed part and a 1st seal member. Therefore, it is possible to effectively suppress the heat generated in the motor main body from being transmitted to the driver unit. As a result, the heat generated in the motor main body of the electronic component mounted on the circuit board can be reduced. The resulting temperature rise can be effectively suppressed.

  In this invention, it is preferable that the heat radiating member in which the fin for heat radiation is formed is being fixed to the 1st case body. If comprised in this way, it will become possible to dissipate the heat | fever of a 1st case body efficiently using a thermal radiation member.

  As described above, in the driver-integrated motor of the present invention, the temperature rise caused by the heat generated in the motor main body portion and the temperature rise caused by the heat generated in the driver portion of the electronic component mounted on the circuit board are reduced. It becomes possible to suppress.

It is a perspective view of a driver integrated motor concerning an embodiment of the invention. It is a disassembled perspective view of the driver integrated motor shown in FIG. It is a disassembled perspective view of the high-order communication part shown in FIG. It is a top view of the high-order communication part shown in FIG. It is a perspective view of the 4th division | segmentation case body shown in FIG. It is a perspective view of the driver integrated motor concerning other embodiments of the present invention.

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

(Configuration of driver integrated motor)
FIG. 1 is a perspective view of a driver-integrated motor 1 according to an embodiment of the present invention. FIG. 2 is an exploded perspective view of the driver-integrated motor 1 shown in FIG. FIG. 3 is an exploded perspective view of the upper communication unit 4 shown in FIG. FIG. 4 is a plan view of the upper communication unit 4 shown in FIG. FIG. 5 is a perspective view of the fourth divided case body 28 shown in FIG.

  The driver integrated motor 1 (hereinafter referred to as “motor 1”) of this embodiment is an industrial servo motor, and is used by being mounted on a host device (not shown) such as a machine tool. The motor 1 includes a motor main body 2 and a driver unit 3. In addition, the motor 1 includes a host communication unit 4 for communicating with a host circuit board (not shown) that is a circuit board of a host device on which the motor 1 is mounted. A control circuit for controlling the host device is mounted on the host circuit board. The motor main body 2 includes a rotor having a rotation shaft 6 and a stator. The motor 1 may include a brake for stopping the rotor.

  In the following description, the axial direction (Z direction in FIG. 1 and the like) of the rotor constituting the motor body 2 is referred to as “axial direction”. Further, the output side of the rotor (Z1 direction side in FIG. 1 etc.) is the “front” side, and the counter output side (Z2 direction side in FIG. 1 etc.) is the “rear (rear)” side. One direction of the radial direction of the rotor perpendicular to the axial direction (X direction in FIG. 1 etc.) is the vertical direction, and the other direction of the rotor radial direction perpendicular to the axial direction and the vertical direction (FIG. 1 etc. (Y direction) is the left-right direction. Further, the X1 direction side in FIG. 1 and the like is the “upper” side, and the X2 direction side is the “lower” side.

  The motor main body 2 and the driver 3 are arranged so as to overlap in the axial direction. The driver unit 3 and the upper communication unit 4 are disposed so as to overlap in the axial direction. The motor body 2 and the upper communication unit 4 are arranged so as to overlap in the vertical direction. Specifically, the driver unit 3 is disposed behind the motor main body unit 2 and the upper communication unit 4. A host communication unit 4 is disposed on the upper side of the motor body 2. In the vertical direction, the lower end of the motor main body 2 and the lower end of the driver unit 3 substantially coincide with each other, and the upper end of the driver unit 3 and the upper end of the upper communication unit 4 substantially coincide with each other. That is, when viewed from the axial direction, the motor main body 2 and the upper communication unit 4 are substantially within the height of the driver unit 3 in the vertical direction.

  The motor main body 2 and the driver unit 3 are fixed to each other via a seal member 7 as a first seal member. The driver unit 3 and the upper communication unit 4 are fixed to each other via a seal member 8 as a third seal member. Further, the motor main body 2 and the upper communication unit 4 are fixed to each other.

  As described above, the motor main body 2 includes the rotor and the stator. One of the rotor or the stator includes a driving magnet, and the other of the rotor or the stator includes a driving coil. The motor main body 2 includes a detection mechanism for detecting the rotational position of the rotor. The detection mechanism is, for example, a magnetic detection mechanism having a detection magnet and a magnetic sensor fixed to the rear end side of the rotating shaft 6. The detection mechanism may be an optical detection mechanism having a slit plate fixed to the rear end side of the rotating shaft 6 and an optical sensor.

  The rotor and the stator are accommodated in a substantially cylindrical case body 10. A holder 11 is fixed to the rear end surface of the case body 10, and a flange 12 is fixed to the front end surface of the case body 10. Case body 10 and flange 12 are formed of a metal material having thermal conductivity. Specifically, case body 10 and flange 12 are formed of an aluminum alloy. On the other hand, the holder 11 is formed of a resin material having heat insulating properties. That is, the holder 11 is formed of a resin material having low thermal conductivity. Specifically, the holder 11 is formed of a hard resin such as a liquid crystal polymer or polycarbonate.

  The holder 11 is formed in a substantially cylindrical shape. Specifically, the holder 11 is formed in a substantially cylindrical shape in which the shape of the inner peripheral surface when viewed from the axial direction is a substantially circular shape and the shape of the outer peripheral surface is a substantially square shape. A magnetic sensor constituting the above-described detection mechanism is fixed to the inner peripheral side of the holder 11. A cable (not shown) that connects circuit boards 13 and 14 (described later) constituting the driver unit 3 and the motor main unit 2 is routed on the inner peripheral side of the holder 11. The flange 12 is formed in a substantially cylindrical shape. Specifically, the flange 12 is formed in a substantially cylindrical shape in which the shape of the inner peripheral surface when viewed from the axial direction is a substantially circular shape and the shape of the outer peripheral surface is a substantially square shape. A rotating shaft 6 is disposed on the inner peripheral side of the flange 12. The flange 12 is provided to attach the motor 1 to the host device.

  The driver unit 3 includes two circuit boards 13 and 14 on which a drive circuit and the like for driving the rotor are mounted, and a case body 15 as a first case body in which the circuit boards 13 and 14 are accommodated. Yes. The upper communication unit 4 includes a circuit board 17 as a communication board for communicating with the upper circuit board, and a case body 18 as a second case body in which the circuit board 17 is accommodated.

  Various electronic components such as a field effect transistor (FET) and an integrated circuit for supplying a current to the driving coil are mounted on the circuit boards 13 and 14. The circuit board 13 and the circuit board 14 are fixed to each other via a plurality of support columns 21 and are arranged so as to be orthogonal to the axial direction with a predetermined interval in the axial direction. In this embodiment, the circuit board 13 is arranged on the rear side, and the circuit board 14 is arranged on the front side.

  The case body 15 includes a split case body 22 as a first split case body that is split in the axial direction at a predetermined joint surface orthogonal to the axial direction, and a split case body 23 as a second split case body. . The case body 15 of this embodiment includes a divided case body 22 and a divided case body 23 that are divided into two in the axial direction. The divided case body 22 constitutes the rear side portion of the case body 15, and the divided case body 23 constitutes the front side portion of the case body 15. The divided case bodies 22 and 23 are made of a metal material having thermal conductivity. That is, the case body 15 is formed of a metal material having thermal conductivity. Specifically, the case body 15 is formed of an aluminum alloy. The surface of the case body 15 is painted with a black paint.

  The divided case body 22 is formed in a substantially rectangular tube shape with a flat bottom in the axial direction. The bottom 22 a of the split case body 22 is formed in a substantially rectangular flat plate shape, and constitutes the rear end surface of the split case body 22. The cylindrical portion 22b of the split case body 22 is formed in a substantially rectangular frame shape, and protrudes from the outer peripheral end of the bottom portion 22a to the front side. A shape holding portion 22c for holding the shape of a seal member 24 described later is formed at the front end of the cylindrical portion 22b so as to protrude to the front side. The shape holding portion 22c is disposed on the inner peripheral side of the seal member 24 formed in a frame shape. The circuit boards 13 and 14 are fixed to the divided case body 22. Further, the circuit board 13 is in contact with the divided case body 22.

  The divided case body 23 is formed in a substantially rectangular tube shape with a flat bottom in the axial direction. The bottom 23 a of the split case body 23 is formed in a substantially rectangular flat plate shape, and constitutes the front end face of the split case body 23. The cylindrical portion 23b of the split case body 23 is formed in a substantially rectangular frame shape, and protrudes from the outer peripheral end of the bottom portion 23a to the rear side. As described above, the motor main body 2 and the driver unit 3 are fixed to each other via the seal member 7, and the driver unit 3 and the upper communication unit 4 are fixed to each other via the seal member 8. In this embodiment, the lower part of the bottom 23 a is fixed to the holder 11 of the motor main body 2, and the upper part of the bottom 23 a is fixed to the case body 18 of the upper communication unit 4. That is, in this embodiment, the lower part of the bottom 23a is a motor fixing part 23c fixed to the motor body 2, and the upper part of the bottom 23a is fixed to the case body 18 which is the second case body. The first case body fixing portion 23d.

  The motor fixing portion 23c is formed with a large through hole 23e penetrating in the axial direction, and the motor fixing portion 23c is formed so as to have a substantially square frame shape when viewed from the axial direction. . Cables that connect the circuit boards 13 and 14 and the motor main body 2 are passed through the through holes 23e. The diameter of the through hole 23e is significantly larger than the outer diameter of the cable passed through the through hole 23e. Positioning protrusions 23f for positioning the driver part 3 with respect to the motor main body part 2 are formed at the four corners of the motor fixing part 23c. The positioning protrusion 23f protrudes forward from the motor fixing portion 23c.

  The first case body fixing portion 23d is formed with two through holes 23g and 23h penetrating in the axial direction. The through holes 23g and 23h are formed in a round hole shape. The through holes 23g and 23h are formed so as to be adjacent in the left-right direction. A power supply cable (not shown) connected to the circuit boards 13 and 14 is passed through the one through hole 23g. A communication cable (signal cable, not shown) connected to the circuit boards 13 and 14 is passed through the other through hole 23h. The through hole 23g is formed in a size corresponding to the outer diameter of the power supply cable, and the through hole 23h is formed in a size corresponding to the outer diameter of the communication cable. Specifically, the through hole 23g is formed to a minimum size necessary for passing a power supply cable, and the through hole 23h is formed to a minimum size required for passing a communication cable. Yes.

  The first case body fixing portion 23d is formed with a substantially square tubular portion 23j protruding forward. The cylindrical portion 23j is formed so as to protrude forward from the outer peripheral end of the first case body fixing portion 23d, and the inner peripheral side of the cylindrical portion 23j is a concave portion 23k that is recessed toward the rear side.

  The divided case body 22 and the divided case body 23 are fixed to each other via a seal member 24 as a second seal member. The seal member 24 is formed in a sheet shape. The seal member 24 is formed in a substantially rectangular frame shape, and is sandwiched between the front end of the cylindrical portion 22 b of the divided case body 22 and the rear end of the cylindrical portion 23 b of the divided case body 23. The seal member 24 is formed of an elastic material such as rubber having thermal conductivity. That is, the seal member 24 is formed of an elastic material such as rubber having a high thermal conductivity. The seal member 24 of this embodiment is formed of silicone rubber, and is formed of “Sarcon (registered trademark)” manufactured by Fuji Polymer Industries Co., Ltd., for example.

  The case body 18 includes a split case body 27 as a third split case body and a split case body 28 as a fourth split case body that are split in the vertical direction at a predetermined joint surface orthogonal to the vertical direction. . The case body 18 of this embodiment is constituted by a divided case body 27 and a divided case body 28 that are divided into two in the vertical direction. The split case body 27 constitutes the lower part of the case body 18, and the split case body 28 constitutes the upper part of the case body 18. The divided case bodies 27 and 28 are formed of a metal material having thermal conductivity. That is, the case body 18 is formed of a metal material having thermal conductivity. Specifically, the case body 18 is formed of an aluminum alloy. Further, the surface of the case body 18 is painted with a black paint in the same manner as the surface of the case body 15.

  The split case body 27 includes a bottom surface portion 27 a that constitutes the lower end surface of the case body 18, and a fixing portion 27 b that is fixed to the holder 11 of the motor main body 2. The bottom surface portion 27a is formed in a substantially rectangular flat plate shape. The fixing portion 27b is formed in a flat plate shape orthogonal to the axial direction, and is formed so as to protrude downward from the bottom surface portion 27a. On the upper surface of the bottom surface portion 27a, a shape holding portion 27d for holding the shape of a seal member 29 described later is formed so as to protrude upward. The shape holding portion 27d is disposed on the inner peripheral side of the seal member 29 formed in a frame shape. The circuit board 17 is fixed to the split case body 27. The circuit board 17 is in contact with the divided case body 27.

  The split case body 28 is formed in a substantially rectangular tube shape with a bottom that is flat in the vertical direction. The bottom portion 28 a of the split case body 28 is formed in a substantially rectangular flat plate shape, and constitutes a surface on the upper end side of the split case body 28. The cylindrical portion 28b of the split case body 28 is formed in a substantially rectangular frame shape, and protrudes downward from the outer peripheral end of the bottom portion 28a. A plurality of heat radiation fins 28c are formed on the bottom portion 28a. The plurality of fins 28c are formed so as to protrude upward from the upper surface of the bottom portion 28a. The upper end side of the divided case body 28 is a heat radiating portion 28d for radiating heat.

  The heat radiating portion 28d is formed with a connector attachment hole 28e to which a cable connection connector (not shown) is attached. Specifically, a connector mounting hole 28e is formed in the bottom portion 28a. The connector mounting hole 28e is formed so as to penetrate the bottom portion 28a in the vertical direction. In this embodiment, two connector mounting holes 28e, which are a connector mounting hole 28e to which a connector to which a power supply cable is connected, are mounted and a connector mounting hole 28e to which a connector to which a communication cable is connected are mounted in the axial direction. It is formed to be adjacent. That is, two connectors are attached to the heat radiating portion 28d. In addition, in the portion where the connector is attached (that is, the portion where the connector attachment hole 28e is formed), some of the fins 28c are cut out so that the connector can be arranged. A seal member such as rubber packing is attached to a portion of the connector that contacts the bottom portion 28a.

  The rear end portion of the case body 18 is a second case body fixing portion 18a that is fixed to the case body 15 that is the first case body (see FIG. 4). Two through holes 28g and 28h penetrating in the axial direction are formed in the second case body fixing portion 18a. Specifically, two through holes 28g and 28h penetrating in the axial direction are formed in the rear side surface 28j of the cylindrical portion 28b. The through holes 28g and 28h are formed in a round hole shape. One through hole 28g is formed at the same position as the through hole 23g of the split case body 23 in the vertical and horizontal directions, and a power supply cable connected to the circuit boards 13 and 14 is provided in the through hole 28g. Has been passed. The other through hole 28h is formed at the same position as the through hole 23h of the split case body 23 in the vertical and horizontal directions, and a communication cable connected to the circuit boards 13 and 14 passes through the through hole 28h. Has been. The through hole 28g is formed in a size corresponding to the outer diameter of the power supply cable, similarly to the through hole 23g, and the through hole 28h is a size corresponding to the outer diameter of the communication cable, like the through hole 23h. Is formed. In other words, the through hole 28g is formed to a minimum size necessary for passing a power supply cable, and the through hole 28h is formed to a minimum size required for passing a communication cable.

  The through holes 23g and 28g in the present embodiment are first through holes through which power supply cables connected to the circuit boards 13 and 14 are passed, and the through holes 23h and 28h are connected to the circuit boards 13 and 14. A second passage hole through which a communication cable is passed. A communication cable drawn from the connector attached to the connector attachment hole 28 e to the inside of the case body 18 is connected to the circuit board 17. The communication cable drawn from the circuit board 17 is connected to the circuit boards 13 and 14 through the through holes 23h and 28h. On the other hand, the power supply cable drawn out from the connector attached to the connector attachment hole 28e to the inside of the case body 18 passes through the through holes 23g and 28g as they are (that is, without going through the circuit board 17), and the circuit board. 13 and 14 are connected.

  Further, the second case body fixing portion 18a is formed with a convex portion 18b that slightly protrudes toward the rear side. The convex portion 18b is formed in a substantially rectangular parallelepiped shape that is flat in the axial direction. The convex portion 18 b is engaged with a concave portion 23 k formed in the split case body 23. Moreover, the convex part 18b is comprised by the convex part 27c (refer FIG. 3) formed in the division | segmentation case body 27, and the convex part 28k (refer FIG. 3) formed in the rear side surface 28j of the division | segmentation case body 28. FIG. Yes.

  The split case body 27 and the split case body 28 are fixed to each other via a seal member 29 as a fourth seal member. The seal member 29 is formed in a sheet shape. The seal member 29 is formed in a substantially rectangular frame shape and is sandwiched between the outer peripheral end of the upper surface of the divided case body 27 and the lower end of the cylindrical portion 28 b of the divided case body 28. Similar to the seal member 24, the seal member 29 is formed of an elastic material such as rubber having thermal conductivity (that is, high thermal conductivity). The seal member 29 of this embodiment is formed of silicone rubber, and is formed of, for example, the above-mentioned “Sarcon (registered trademark)”.

  The seal member 7 is formed in a sheet shape. The seal member 7 is formed in a substantially square frame shape. The seal member 7 is sandwiched between the front end surface of the motor fixing portion 23 c of the split case body 23 and the rear end of the holder 11. That is, the motor main body 2 and the case body 15 are fixed to each other via the seal member 7. The seal member 7 is formed of an elastic material such as rubber having heat insulating properties (that is, low thermal conductivity). For example, the seal member 7 is a rubber packing and is formed of various rubbers having low thermal conductivity. Cables that connect the circuit boards 13 and 14 and the motor body 2 are passed through the inner peripheral side of the seal member 7. In addition, the holder 11 of this embodiment is a case body fixing member that is fixed to the case body 15 that is the first case body via the seal member 7 that is the first seal member.

  The seal member 8 is formed in a sheet shape. Further, the seal member 8 is formed in a substantially rectangular shape. The seal member 8 is sandwiched between the front end side of the first case body fixing portion 23 d of the split case body 23 and the rear end of the second case body fixing portion 18 a of the case body 18. Specifically, the seal member 8 is sandwiched between the bottom surface (front surface) of the concave portion 23k of the divided case body 23 and the front end surface (rear end surface) of the convex portion 18b of the case body 18. That is, the case body 15 and the case body 18 are fixed to each other via the seal member 8. Similar to the seal members 24 and 29, the seal member 8 is formed of an elastic material such as rubber having thermal conductivity (that is, high thermal conductivity). The seal member 29 of this embodiment is formed of silicone rubber, and is formed of, for example, the above-mentioned “Sarcon (registered trademark)”.

  The seal member 8 has two round holes 8a and 8b. One through-hole 8a is formed at the same position as the through-holes 23g and 28g in the vertical and horizontal directions, and a power supply cable connected to the circuit boards 13 and 14 is passed through the through-hole 8a. Yes. The other through-hole 8b is formed at the same position as the through-holes 23h and 28h in the vertical and horizontal directions, and a communication cable connected to the circuit boards 13 and 14 is passed through the through-hole 8b. . The through hole 8a is formed in a size corresponding to the outer diameter of the power supply cable, similarly to the through holes 23g, 28g, and the through hole 8b is formed in the outer diameter of the communication cable, similar to the through holes 23h, 28h. It is formed in the size according to. That is, the through hole 8a is formed to a minimum size necessary for passing a power supply cable, and the through hole 8b is formed to a minimum size required for passing a communication cable.

  In the motor 1 configured as described above, when a current is supplied to the driving coil and the rotor rotates, the driving coil and the like generate heat and the motor main body 2 generates heat, and the circuit boards 13 and 14 The mounted electronic components such as FETs generate heat, and the circuit boards 13 and 14 generate heat. Transmission of heat generated in the motor main body 2 to the driver unit 3 is suppressed by the holder 11 formed of a heat-insulating resin material and the seal member 7 formed of a heat-insulating elastic material. Further, the transfer of heat generated in the motor main body 2 to the upper communication unit 4 is suppressed by the holder 11. On the other hand, the heat generated in the circuit boards 13 and 14 is transmitted to the divided case body 22, the seal member 24 and the divided case body 23, and is also transmitted to the seal member 8 and the case body 18 to be dissipated.

  The circuit board 17 of this embodiment is a communication board for communicating with the upper circuit board, and the circuit board 17 generates almost no heat. In this embodiment, the heat radiating portion 28d formed in the case body 18 in which the circuit board 17 is accommodated functions to dissipate heat generated in the circuit boards 13 and 14. That is, the case body 18 in which the circuit board 17 is accommodated is formed with a heat radiating portion 28 d for radiating the heat of the circuit boards 13 and 14.

(Main effects of this form)
As described above, in this embodiment, the motor main body 2 and the case body 15 of the driver section 3 are fixed to each other via the seal member 7 formed of an elastic material having heat insulation properties, and the case body 15 is attached to the case body 15. The holder 11 of the motor main body 2 to be fixed is formed of a heat-insulating resin material, and the heat generated in the motor main body 2 is transmitted to the driver unit 3 by the holder 11 and the seal member 7. ing. Therefore, in this embodiment, it is possible to suppress the temperature rise caused by the heat generated in the motor main body 2 of the electronic components mounted on the circuit boards 13 and 14.

  In this embodiment, since the motor fixing portion 23c is formed so as to have a substantially square frame shape when viewed from the axial direction, the contact area between the motor fixing portion 23c and the seal member 7 is reduced. It becomes possible to do. Therefore, in this embodiment, it is possible to effectively suppress the heat generated in the motor main body 2 from being transmitted to the driver unit 3, and as a result, the electronic components mounted on the circuit boards 13 and 14 can be prevented. The temperature rise caused by the heat generated in the motor main body 2 can be effectively suppressed.

  In this embodiment, the split case body 22 and the split case body 23 are fixed to each other via a seal member 24 formed of an elastic material having thermal conductivity, and the split case body 23 and the case body 18 are heated. The heat generated in the circuit boards 13 and 14 is transmitted to the divided case body 22, the seal member 24, and the divided case body 23, which are fixed to each other via the sealing member 8 formed of an elastic material having conductivity. At the same time, it is transmitted to the seal member 8 and the case body 18. Therefore, in this embodiment, it is possible to efficiently dissipate heat generated in the circuit boards 13 and 14 using the divided case body 22, the divided case body 23, and the case body 18. As a result, in this embodiment, it is possible to effectively suppress the temperature rise caused by the heat generated in the driver unit 3 of the electronic components mounted on the circuit boards 13 and 14.

  In this embodiment, since the circuit board 13 is in contact with the divided case body 22, the heat generated in the circuit boards 13 and 14 is efficiently transferred to the divided case body 22, the seal member 24, and the divided case body 23. Thus, it is possible to dissipate efficiently. Further, in this embodiment, since the heat radiating fins 28 c are formed in the case body 18, it is possible to efficiently dissipate heat generated in the circuit boards 13 and 14 using the case body 18. Become. Furthermore, in this embodiment, since the surfaces of the case bodies 15 and 18 are painted with a black paint, it becomes possible to increase the heat radiation of the case bodies 15 and 18, and the case bodies 15 and 18 are used. The heat generated in the circuit boards 13 and 14 can be efficiently dissipated. Furthermore, in this embodiment, the split case body 27 and the split case body 28 constituting the case body 18 are fixed to each other via a seal member 29 formed of an elastic material having thermal conductivity. Even when the body 18 is divided into the divided case body 27 and the divided case body 28, the heat transferred to the case body 18 is efficiently dissipated using the divided case body 27 and the divided case body 28. Is possible. In this embodiment, the through-hole 8a formed in the seal member 8, the through-hole 23g formed in the split case body 23, and the through-hole 28g formed in the split case body 28 allow the power supply cable to pass therethrough. The through hole 8b formed in the minimum necessary size and formed in the seal member 8, the through hole 23h formed in the split case body 23, and the through hole 28h formed in the split case body 28 serve as communication cables. Since it is formed in the minimum size necessary for passing, it is possible to increase the contact area between the divided case body 23 and the seal member 8 and the contact area between the divided case body 28 and the seal member 8. Become. Therefore, in this embodiment, heat can be efficiently transmitted from the divided case body 23 to the case body 18, and heat generated in the circuit boards 13 and 14 can be effectively dissipated. As described above, in this embodiment, it is possible to more effectively suppress the temperature rise caused by the heat generated in the driver unit 3 of the electronic components mounted on the circuit boards 13 and 14.

  In this embodiment, the case body 15 includes a divided case body 22 and a divided case body 23. Therefore, in this embodiment, for example, the case body 15 can be easily manufactured even if the shape of the case body 15 is complicated. Further, in this embodiment, the case body 18 is composed of the divided case body 27 and the divided case body 28. For example, even when the shape of the case body 18 is complicated, the case body 18 is easily manufactured. It becomes possible.

  In the present embodiment, the motor main body 2 and the driver unit 3 are fixed to each other via a seal member 7, and the driver unit 3 and the upper communication unit 4 are fixed to each other via a seal member 8. Therefore, in this embodiment, it is possible to prevent water, dust, and the like from entering the motor 1 from between the motor body 2 and the driver unit 3 and between the driver unit 3 and the upper communication unit 4. become. In particular, in this embodiment, the seal member 8 is sandwiched between the bottom surface of the concave portion 23k of the divided case body 23 and the front end surface of the convex portion 18b of the case body 18, so that the driver unit 3 and the upper communication unit 4 It becomes possible to effectively prevent water, dust, and the like from entering the motor 1 from the inside. Further, in this embodiment, since the split case body 22 and the split case body 23 are fixed to each other via the seal member 24, water is supplied from between the split case body 22 and the split case body 23 to the inside of the case body 15. And dust can be prevented from entering. Further, in this embodiment, the split case body 27 and the split case body 28 are fixed to each other via the seal member 29, so that water is supplied from between the split case body 27 and the split case body 28 to the inside of the case body 18. And dust can be prevented from entering. As described above, in this embodiment, it is possible to improve the waterproofness and dustproofness of the motor 1.

  In this embodiment, the motor main body 2 and the upper communication unit 4 are arranged so as to overlap in the vertical direction. Therefore, in this embodiment, the motor 1 can be downsized in the axial direction. Further, in this embodiment, a magnetic sensor constituting a detection mechanism for detecting the rotational position of the rotor is fixed to the holder 11 for suppressing the heat generated in the motor main body 2 to the driver unit 3. Therefore, the configuration of the motor main body 2 can be simplified as compared with a case where a member to which the magnetic sensor is fixed is separately provided.

(Other embodiments)
The above-described embodiment is an example of a preferred embodiment of the present invention, but is not limited to this, and various modifications can be made without departing from the scope of the present invention.

  In the embodiment described above, a plurality of fins 28 c are formed on the divided case body 28 that constitutes the case body 18. In addition to this, for example, if the case body 15 and the case body 18 have a sufficient heat dissipation function, the fins 28 c may not be formed in the divided case body 28. In the above-described embodiment, the driver unit 3 and the upper communication unit 4 are fixed to each other via the seal member 8 formed of an elastic material having thermal conductivity, but the case body 15 has a sufficient heat dissipation function. If provided, the driver unit 3 and the upper communication unit 4 may be fixed to each other through a seal member having low thermal conductivity.

  In the above-described embodiment, as shown in FIG. 6, the heat radiating member 33 in which a plurality of heat radiating fins 33 a are formed may be fixed to the case body 15. In this case, the heat radiating member 33 is formed of a metal material having thermal conductivity such as an aluminum alloy. In this case, the heat radiating member 33 is fixed to the rear side surface of the bottom 22a of the split case body 22 so that the plurality of fins 33a protrude rearward. In this case, the heat generated in the circuit boards 13 and 14 can be efficiently dissipated using the heat radiating member 33. Moreover, in the form mentioned above, you may attach a heat pipe to the side surface of the division | segmentation case bodies 22,23,28. In this case, the heat generated in the circuit boards 13 and 14 can be more efficiently transmitted to the split case body 28 and dissipated from the plurality of fins 28c.

  In the embodiment described above, the seal member 8, the seal member 24, and the seal member 29 are formed of the same material. In addition, for example, the seal member 8, the seal member 24, and the seal member 29 may be formed of different materials as long as they are formed of a material having high thermal conductivity.

  In the embodiment described above, the case body 15 is constituted by the two divided case bodies 22 and 23. In addition, for example, the case body 15 may be configured by three or more divided case bodies. Similarly, the case body 18 is constituted by two divided case bodies 27 and 28, but the case body 18 may be constituted by three or more divided case bodies. In this case, the divided case bodies are fixed to each other via a seal member formed of an elastic material having the same thermal conductivity as that of the seal members 24 and 29.

  With the form mentioned above, the holder 11 is formed with the resin material which has heat insulation. In addition, for example, the holder 11 may be formed of a metal material such as an aluminum alloy having thermal conductivity in the same manner as the case body 10 and the flange 12. Moreover, in the form mentioned above, although the magnetic sensor is being fixed to the holder 11, the member to which a magnetic sensor is fixed may be provided separately.

  In the embodiment described above, the split case body 27 is formed of an aluminum alloy. In addition to this, for example, the divided case body 27 may be formed of a resin material having heat insulation properties. In this case, it is possible to effectively suppress the heat generated in the motor main body 2 from being transmitted to the driver unit 3 through the split case body 27. In this case, it is possible to effectively suppress the heat generated in the motor main body 2 from being transmitted to the split case body 28. Therefore, it is possible to effectively dissipate the heat transmitted from the driver unit 3 to the split case body 28 by the fins 28c. In this case, the seal member 29 is formed of an elastic material such as rubber having heat insulation, for example.

  In the embodiment described above, two through holes 8 a and 8 b are formed in the seal member 8, two through holes 23 g and 23 h are formed in the divided case body 23, and two through holes 28 g are formed in the divided case body 28. 28h is formed. In addition, for example, one through hole through which the power supply cable and the communication cable are passed may be formed in the seal member 8 and the divided case bodies 23 and 28. Further, in the above-described form, the recessed part 23k is formed in the split case body 23, and the convex part 18b that engages with the concave part 23k is formed in the case body 18, but the convex part corresponding to the convex part 18b is the split case body. 23, a recess corresponding to the recess 23k may be formed in the case body 18.

1 Motor (driver integrated motor)
2 Motor body 3 Driver unit 4 Upper communication unit 7 Seal member (first seal member)
8 Seal member (third seal member)
11 Holder (Case body fixing member)
13, 14 Circuit board 15 Case body (first case body)
17 Circuit board (communication board)
18 Case body (second case body)
18a 2nd case body fixing | fixed part 18b Convex part 22 Split case body (1st split case body)
23 Split case body (second split case body)
23c Motor fixing portion 23d First case body fixing portion 23g Through hole (first passage hole)
23h Through hole (second passage hole)
23k recess 24 seal member (second seal member)
27 Split case body (third split case body)
28 Split case body (4th split case body)
28c Fin 28g Through hole (first passage hole)
28h Through hole (second passage hole)
29 Seal member (fourth seal member)
33 Heat dissipation member 33a Fin Z-axis direction

Claims (10)

A motor body having a rotor and a stator; a circuit board on which a drive circuit for driving the rotor is mounted; and a driver unit having a first case body in which the circuit board is housed.
The motor main body and the first case body are fixed to each other via a first seal member formed of an elastic material having heat insulation properties,
The first case body includes a first divided case body and a second divided case body that are divided at a predetermined joining surface,
The first divided case body and the second divided case body are formed separately from the first divided case body and the second divided case body and are formed of an elastic material having thermal conductivity and the first divided case body. Fixed to each other via a second seal member sandwiched between the split case body and the second split case body ,
The motor body includes a case body fixing member fixed to the first case body via the first seal member,
The case body fixing member is formed of a heat-insulating resin material .   The driver integrated motor according to claim 1, wherein the circuit board is accommodated in the first case body so as to be in contact with the first divided case body. An upper communication unit having a communication board for communicating with an upper circuit board of an upper apparatus on which the driver integrated motor is mounted, and a second case body in which the communication board is accommodated;
The motor main body and the driver are arranged so as to overlap in the axial direction of the rotor,
The motor body and the upper communication unit are arranged so as to overlap in the radial direction of the rotor,
The said 1st case body and the said 2nd case body are mutually fixed via the 3rd sealing member formed with the elastic material which has heat conductivity. Driver integrated motor.   The driver-integrated motor according to claim 3, wherein the second case body is formed with fins for heat dissipation. The second case body includes a third divided case body and a fourth divided case body that are divided at a predetermined joining surface,
The third divided case body and the fourth divided case body are fixed to each other via a fourth seal member formed of an elastic material having thermal conductivity. The driver integrated motor described. The first case body fixing portion which is a portion fixed to the second case body of the first case body, or the second case which is a portion fixed to the first case body of the second case body. In either one of the body fixing portions, a convex portion that protrudes toward the other of the first case body fixing portion or the second case body fixing portion is formed,
On the other side of the first case body fixing portion or the second case body fixing portion, a concave portion that engages with the convex portion is formed,
6. The driver-integrated motor according to claim 3, wherein the third seal member is sandwiched between a front end surface of the convex portion and a bottom surface of the concave portion.   A first case body fixing portion which is a portion fixed to the second case body of the first case body, and a second case which is a portion fixed to the first case body of the second case body. In the body fixing portion, a first passage hole through which a power supply cable connected to the circuit board is passed is formed in a size corresponding to the outer diameter of the power supply cable and connected to the circuit board. The driver integrated type according to any one of claims 3 to 6, wherein the second passage hole through which the communication cable is passed is formed in a size corresponding to the outer diameter of the communication cable. motor. The motor body includes a detection mechanism for detecting the rotational position of the rotor,
The driver integrated motor according to any one of claims 1 to 7 , wherein a part of the detection mechanism is fixed to the case body fixing member. The motor main body and the driver are arranged so as to overlap in the axial direction of the rotor,
The motor fixing portion which is a portion fixed to the motor main body portion of the first case body is formed so that a shape when viewed from the axial direction is a frame shape. The driver integrated motor according to any one of 1 to 8 . The driver-integrated motor according to any one of claims 1 to 9 , wherein a heat radiating member on which heat radiating fins are formed is fixed to the first case body.

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