JP6081810B2 - Motor actuator - Google Patents

Description

  The present invention relates to a motor actuator.

  2. Description of the Related Art Conventionally, there are some vehicle air conditioners that drive an air passage switching door (various dampers) by a motor actuator that uses a motor as a drive source. As such an actuator, there is an actuator in which a motor and a reduction gear that decelerates and outputs the rotation of the motor are accommodated in a housing (see, for example, Patent Document 1).

Japanese Patent No. 4031351

  By the way, in the actuator as described above, when the drive circuit unit for controlling the drive of the motor is accommodated in the housing, there is a concern that oil such as grease used for the reduction gear adheres to the drive circuit unit. . This causes a malfunction of the drive circuit unit.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to prevent oil such as grease used in the reduction gear from adhering to the drive circuit unit, and to drive based on that. An object of the present invention is to provide a motor actuator capable of preventing malfunction of a circuit unit.

A motor actuator that solves the above problems includes a motor, a reduction gear that decelerates and outputs the rotation of the motor, and a drive circuit unit that controls the drive of the motor. A motor actuator provided with a wall portion for preventing intrusion of oil from the reduction gear side to the drive circuit portion side, and outputs a position detection signal corresponding to the rotational position of at least one of the reduction gears A position detection sensor; and a sensor signal transmission member for transmitting the position detection signal output from the position detection sensor to the drive circuit unit; and the housing includes a first case and a first case assembled to overlap each other. The wall portion is provided on at least one of the sensor signal transmission member, the first case, and the second case. A pressure wall portion for preventing the oil agent from entering along the sensor signal transmission member when the tip is in pressure contact with another member in a state where the first case and the second case are assembled. The tip portion of the was provided with a thin tip of the press, the thickness of which decreased toward the tip .

  According to this configuration, since the wall portion for preventing the intrusion of the oil agent from the reduction gear side to the drive circuit portion side is provided in the housing, the oil agent such as grease used for the reduction gear is provided in the drive circuit portion. Therefore, it is possible to prevent malfunction of the drive circuit unit based on the adhesion.

  According to this configuration, the wall portion is provided in at least one of the sensor signal transmission member, the first case, and the second case, and the tip is pressed against another member in a state where the first case and the second case are assembled. In addition, since the pressing wall portion for preventing the oil agent from entering along the sensor signal transmission member is included, it is possible to prevent the oil agent from entering the portion only by assembling the first and second cases. In addition, since the tip of the pressing wall portion is provided with a pressing tip thin portion that decreases in thickness toward the tip, when the pressing tip thin portion comes into pressure contact, the tip is appropriately crushed, thereby transmitting the sensor signal. While absorbing the dimensional error between the member and the first and second cases, the oil agent can be blocked by a good pressing contact. That is, if the pressing tip thin part is not provided, it is difficult to make the pressing wall part press well to other members unless the dimensional accuracy of the sensor signal transmission member and the first and second cases is increased. Can solve this problem.

  In the motor actuator, the pressing wall portion is provided in one of the first case and the second case and is pressed against the sensor signal transmission member, and on both sides of the pressing wall portion, , Projecting side portions projecting outward from both sides of the sensor signal transmission member are formed, and the first case and the second case are assembled to the other of the first case and the second case. It is preferable that a side receiving groove that surrounds the protruding side portion is formed.

  According to the same configuration, the projecting side portions projecting outward from both sides of the sensor signal transmission member to be pressed and contacted are formed on both side portions of the pressing wall portion provided in one of the first case and the second case. It is formed. Since either one of the first case and the second case is formed with a side receiving groove that surrounds the protruding side portion in a state where the first case and the second case are assembled, the first and second cases The infiltration of the oil along the both side portions of the pressing wall portion can be suppressed only by assembling.

In the motor actuator, it is preferable that a protruding side portion is formed with a side protruding portion that protrudes from the pressing tip thin portion.
According to this configuration, since the protruding side portion is formed with a side protruding portion that protrudes from the pressing tip thin portion, the oil agent is disposed along the side portion of the sensor signal transmission member. Infiltration can be suppressed.

  In the motor actuator, the sensor signal transmission member includes a plurality of conductive terminals that transmit the position detection signal, and an insulating member that holds the terminals in an insulated state, and the pressing wall portion includes: It is preferable that the insulating member is pressed into contact.

  According to this configuration, the sensor signal transmission member has a plurality of conductive terminals that transmit the position detection signal and an insulating member that holds the terminals in an insulated state, so that handling of the plurality of terminals is facilitated. For example, the motor actuator can be easily assembled. And since the said press wall part is press-contacted to the said insulating member, it can contact | adhere easily, without damaging a terminal.

  In the motor actuator, the housing includes a first case and a second case that are stacked on each other and assembled, and the wall portion is provided on the first and second cases, and the first case and the second case are connected to each other. It is preferable to include first and second crank walls that form crank-opposing surfaces that are opposed to each other in a crank shape in the assembled state and prevent the intrusion of the oil.

  According to this configuration, the wall portion is provided in the first and second cases, and the crank facing surfaces that are opposed to each other in a crank shape are formed in a state where the first case and the second case are assembled to prevent the intrusion of the oil agent. Since the first and second crank wall portions are included, it is possible to prevent the oil agent from entering the portion only by assembling the first and second cases.

  In the actuator of the present invention, it is possible to prevent the oil agent such as grease used for the reduction gear from adhering to the drive circuit unit, and to prevent malfunction of the drive circuit unit based on that.

The top view of the motor actuator except the 2nd case in one embodiment. (A) is a top view of the motor actuator in one Embodiment. (B) is a side view of the motor actuator. (C) is a bottom view of the motor actuator. The partial perspective view of the 2nd case in one embodiment The partial perspective view of the 1st case in one embodiment. The partial expansion perspective view of the 2nd case in one embodiment. The partial expansion perspective view of the 1st case in one embodiment. Sectional drawing of the position corresponding to the press wall part in one Embodiment. Sectional drawing along the AA line of FIG. Sectional drawing along the BB line of FIG. Sectional drawing along the CC line of Fig.2 (a). Sectional drawing of the position corresponding to the press wall part in another example. Sectional drawing of the position corresponding to the press wall part in another example.

Hereinafter, an embodiment of a motor actuator will be described with reference to FIGS.
A motor actuator 1 shown in FIG. 1 is provided in a vehicle air conditioner and drives an air passage switching door (various dampers). The motor actuator 1 accommodates a plurality (two in this embodiment) of output groups 81 and 91 (that is, a first output group 81 and a second output group 91) that output rotation in the housing 10. Is formed.

  As shown in FIG. 2B, the housing 10 is composed of a first case 11 and a second case 51 that are stacked and assembled with each other, and has a hollow box shape. The first case 11 and the second case 51 are made of a resin material.

  As shown in FIGS. 2B and 2C, the first case 11 is erected along a first bottom portion 12 having a substantially square plate shape and an outer peripheral edge of the first bottom portion 12. The first side wall portion 13 is formed in a dish shape. A plurality (eight in this embodiment) of engaging protrusions 14 projecting to the outside of the first case 11 are formed on the outer peripheral surface of the first side wall portion 13. A plurality of (four in this embodiment) first fixing portions 15 are formed at the opening of the first case 11, that is, at the end of the first side wall portion 13 opposite to the first bottom portion 12. . The first fixing portion 15 extends in parallel with the first bottom portion 12 from the first side wall portion 13 toward the outside of the first case 11 and has a substantially rectangular flat plate shape. Each first fixing portion 15 is formed with a first insertion hole 16 that penetrates the first fixing portion 15 in the thickness direction.

  As shown in FIG. 1, FIG. 2B and FIG. 4, the tip of the first side wall portion 13, that is, the end of the first side wall portion 13 opposite to the first bottom portion 12, In the state in which the second case 51 is assembled, a facing surface 17 is formed opposite to the second case 51 side in a crank shape. That is, at the front end portion of the first side wall portion 13, two planes that are parallel to the first bottom portion 12 and have a step and a plane perpendicular to the first bottom portion 12 that connects these planes are formed. A facing surface 17 is formed. In addition, the opposing surface 17 of the 1st side wall part 13 is formed in the outer plane high.

  As shown in FIG. 1, the first case 11 is formed with a first connector having a substantially rectangular tube shape protruding outward from the first side wall portion 13 (below the first side wall portion 13 in FIG. 1). A portion 23 is formed.

  The first connector forming portion 23 includes a plurality of (8 in this embodiment) for supplying power to the motor actuator 1 and exchanging electrical signals with an external device (not shown) mounted on the vehicle. The connector terminal 41 of this) is arranged. The eight connector terminals 41 are made of a conductive metal material and have a rod shape. Further, the eight connector terminals 41 are arranged so as to extend along the protruding direction of the first connector forming portion 23.

  As shown in FIGS. 2A and 2B, the second case 51 includes a second bottom portion 52 that faces the first bottom portion 12 of the first case 11, and an outer peripheral edge of the second bottom portion 52. And a second side wall portion 53 formed along the shape of the plate. In the present embodiment, the second side wall portion 53 is formed with a height (height from the second bottom portion 52) lower than that of the first side wall portion 13, and the second case 51 is lower than the first case 11. It has a shallow dish shape. On the outer peripheral surface of the second side wall 53, the same number (ie, eight) of engaging pieces 54 as the engaging protrusions 14 are formed. The eight engaging pieces 54 are formed at positions facing the eight engaging protrusions 14 formed on the first case 11, and extend to the side opposite to the second bottom portion 52. Further, at the opening of the second case 51, that is, at the end of the second side wall 53 opposite to the second bottom 52, the same number (that is, four) of second fixings 55 as the first fixings 15 are provided. Is formed. The four second fixing portions 55 are formed at positions facing the four first fixing portions 15 formed on the first case 11, and extend from the second side wall portion 53 to the outside of the second case 51. And extending in parallel with the second bottom portion 52 and has a substantially rectangular flat plate shape. Each second fixing portion 55 is formed with a second insertion hole 56 that penetrates the second fixing portion 55 in the thickness direction.

  As shown in FIGS. 2B and 3, the first case 11 and the second case are provided at the tip of the second side wall 53, that is, at the end opposite to the second bottom 52 in the second side wall 53. In a state where 51 is assembled, a facing surface 57 facing the first case 11, specifically, the facing surface 17 in a crank shape is formed. That is, at the front end portion of the second side wall portion 53, two planes parallel to the second bottom portion 52 and having a step, and a plane perpendicular to the second bottom portion 52 connecting these planes are formed. A facing surface 57 is formed. The opposing surface 57 of the second side wall portion 53 is formed with a lower outer plane, contrary to the opposing surface 17 of the first side wall portion 13.

  Further, as shown in FIG. 2A, the second case 51 has a substantially rectangular flat plate shape that protrudes to the outside of the second case 51 and closes the opened portion of the cylindrical portion of the first connector forming portion 23. The second connector forming portion 61 is formed.

  As shown in FIG. 2B, the first case 11 and the second case 51 are stacked and assembled with their openings facing each other. The opening of the first case 11 is closed by the second case 51. Further, the eight engagement pieces 54 of the second case 51 are snap-fit engaged with the eight engagement protrusions 14 of the first case 11, so that the engagement protrusions 14 and the engagement pieces 54 cause the first engagement. The first case 11 and the second case 51 are fastened and fixed and integrated. Further, by assembling the first case 11 and the second case 51, the opposing surfaces 17 and 57 having a crank shape are opposed to each other, and the inside of the housing 10 is substantially closed by abutting in the assembling direction.

  Further, as shown in FIGS. 2A and 2B, the first case 11 and the second case 51 are assembled so that the first connector forming portion 23 and the second connector forming portion 61 are overlapped. A rectangular cylindrical connector portion 72 is formed.

  Moreover, as shown in FIG. 1 and FIGS. 2A to 2C, the first fixing portion 15 and the second fixing portion 55 are overlapped by assembling the first case 11 and the second case 51. Then, the first insertion hole 16 and the second insertion hole 56 are overlapped. The housing 10 is fixed to the vehicle by inserting and tightening screws (not shown) through the first insertion hole 16 and the second insertion hole 56 of the first fixing portion 15 and the second fixing portion 55 that are overlapped with each other. The

  As shown in FIG. 1, the first output group 81 includes a motor 82, a worm 83, a first reduction gear 84, a second reduction gear 85, and an output gear 86. The worm 83, the first reduction gear 84, the second reduction gear 85, and the output gear 86 are all disposed at least partially inside the housing 10 to transmit the rotation of the motor 82. Is a reduction gear for decelerating and outputting the rotation of the motor 82. These reduction gears are disposed on the side opposite to the connector portion 72 (upper side in FIG. 1) than the motor 82.

  The motor 82 has a cylindrical housing case 82a closed at both ends. A rotating shaft 82b of the motor 82 protrudes from the center of one end surface in the axial direction of the housing case 82a, and a pair of motor sides for supplying power to the motor 82 is provided on the other end surface in the axial direction of the housing case 82a. A power feeding terminal (not shown) is provided. The motor 82 rotates the rotating shaft 82b when power is supplied from the motor side power supply terminal. Further, support projections 82c projecting in the axial direction of the housing case 82a are respectively formed at the center portions of both end surfaces in the axial direction of the housing case 82a. In the housing 10, a pair of motor support portions 12 a and 12 b for supporting the motor 82 is formed integrally with the first bottom portion 12 on the first bottom portion 12. The pair of motor support portions 12 a and 12 b is erected on the first bottom portion 12. In the motor 82, in a state where the housing case 82a is disposed between the pair of motor support portions 12a and 12b, two support protrusions 82c provided at both end portions in the axial direction of the housing case 82a are provided with the pair of motor support portions 12a and 12a. By being supported by 12b, it is supported by motor support parts 12a and 12b.

  The worm 83 is mounted on the rotating shaft 82b of the motor 82 so as to be rotatable integrally with the rotating shaft 82b. The first reduction gear 84 is arranged in the vicinity of the worm 83 inside the housing 10. The first reduction gear 84 includes a first large-diameter gear 84a that has a disk shape, and a first small-diameter gear 84b that is formed integrally with the first large-diameter gear 84a. The first small diameter gear 84b has a disk shape with a smaller diameter than the first large diameter gear 84a, and is coaxial with the first large diameter gear 84a at one end surface in the axial direction of the first large diameter gear 84a. Are integrally formed. The first reduction gear 84 is rotatably assembled inside the housing 10 so that the first small-diameter gear 84b is disposed between the first large-diameter gear 84a and the first bottom portion 12, and is A radial gear 84 a meshes with the worm 83.

  In the housing 10, the second reduction gear 85 is disposed in the vicinity of the first reduction gear 84. The second reduction gear 85 includes a disk-shaped second large-diameter gear 85a and a second small-diameter gear 85b formed integrally with the second large-diameter gear 85a. The second small diameter gear 85b has a disk shape with a smaller diameter than the second large diameter gear 85a, and is coaxial with the second large diameter gear 85a on one end surface in the axial direction of the second large diameter gear 85a. Are integrally formed. The second reduction gear 85 is rotatably assembled inside the housing 10 such that the second large diameter gear 85a is disposed between the second small diameter gear 85b and the first bottom portion 12, and the second large speed gear 85b. A diameter gear 85 a meshes with the first small diameter gear 84 b of the first reduction gear 84.

  The output gear 86 is disposed in the vicinity of the second reduction gear 85 inside the housing 10. The output gear 86 has a substantially disk shape, and an output shaft 86a is formed at the center in the radial direction. The output shaft 86a has a cylindrical shape, and a connecting recess 86b is formed on the tip surface thereof. The connection recess 86b is substantially T-shaped when viewed from the direction of the rotation axis of the output gear 86. The output gear 86 is rotatably assembled inside the housing 10 with the output shaft 86a facing away from the first bottom portion 12, and meshes with the second small-diameter gear 85b of the second reduction gear 85. Yes. As shown in FIG. 2A, the output shaft 86a is a first output hole formed in a portion of the second bottom 52 of the second case 51 facing the output gear 86 in the axial direction of the output gear 86. Projecting to the outside of the housing 10 from 52a. A link mechanism (not shown) for operating the air passage switching door is connected to the tip of the output shaft 86a protruding outside the housing 10. That is, the output shaft 86a is connected to the air passage switching door via the link mechanism. The link mechanism connected to the output shaft 86a is formed with a substantially T-shaped protrusion corresponding to the connection recess, and the link mechanism is connected to the output by inserting the protrusion into the connection recess 86b. The shaft 86a is connected so as not to rotate relative to the shaft 86a.

  As shown in FIG. 1, in the first output group 81 as described above, when the motor 82 is operated, the rotation of the rotating shaft 82 b is transmitted to the worm 83. The rotation transmitted to the worm 83 is transmitted while being decelerated in the order of the first reduction gear 84, the second reduction gear 85, and the output gear 86. The rotation transmitted to the output gear 86 is output from the output shaft 86a, and the air passage switching door is driven via a link mechanism connected to the output shaft 86a.

  The second output group 91 includes a motor 92, a worm 93, an output gear 94, and a sensor output shaft 95. The worm 93, the output gear 94, and the sensor output shaft 95 are all disposed at least partially inside the housing 10 to transmit the rotation of the motor 92, and all reduce the rotation of the motor 92. This is a reduction gear for output. Further, these reduction gears are disposed on the side opposite to the connector portion 72 from the motor 92 (upper side in FIG. 1).

  The motor 92 has the same shape as the motor 82 constituting the first output group 81. That is, the motor 92 has a cylindrical housing case 92a whose both ends are closed. A rotating shaft 92b of the motor 92 protrudes from the center of one end surface in the axial direction of the housing case 92a, and a pair of motor sides for supplying power to the motor 92 is provided on the other end surface in the axial direction of the housing case 92a. A power feeding terminal (not shown) is provided. The motor 92 rotates the rotating shaft 92b when power is supplied from the motor side power supply terminal. In addition, support projections 92c projecting in the axial direction of the housing case 92a are formed at the center portions of both end surfaces in the axial direction of the housing case 92a. In the housing 10, a pair of motor support portions 12 c and 12 d for supporting the motor 92 is formed integrally with the first bottom portion 12 on the first bottom portion 12. The pair of motor support portions 12 c and 12 d is erected on the first bottom portion 12 so as to be perpendicular to the first bottom portion 12. In the motor 92, the housing case 92a is disposed between the pair of motor support portions 12c and 12d, and the two support projections 92c provided at both ends in the axial direction of the housing case 92a include the pair of motor support portions 12c and 12c. By being supported by 12d, it is supported by motor support portions 12c and 12d.

  The worm 93 is mounted on the rotating shaft 92b of the motor 92 so as to be rotatable integrally with the rotating shaft 92b. The output gear 94 is arranged in the vicinity of the worm 93 inside the housing 10. The output gear 94 includes a large-diameter gear 94a having a disk shape and a small-diameter gear 94b formed integrally with the large-diameter gear 94a. The small-diameter gear 94b has a disk shape smaller in diameter than the large-diameter gear 94a, and is integrally formed on one end surface in the axial direction of the large-diameter gear 94a so as to be coaxial with the large-diameter gear 94a. The output gear 94 is rotatably assembled inside the housing 10 such that the large diameter gear 94a is disposed between the small diameter gear 94b and the first bottom portion 12, and the large diameter gear 94a meshes with the worm 93. doing. Further, as shown in FIG. 2A, the small-diameter gear 94 b of the output gear 94 is formed at a portion of the second bottom portion 52 of the second case 51 that faces the output gear 94 in the axial direction of the output gear 94. Projecting from the second output hole 52 b to the outside of the housing 10.

  As shown in FIG. 1, the sensor output shaft 95 is disposed at a position separated from the output gear 94 inside the housing 10. The sensor output shaft 95 has a substantially disk shape, and a connecting shaft 95a is formed at the center in the radial direction. The connecting shaft 95a has a columnar shape in which the shape of the sensor output shaft 95 viewed from the rotation axis is substantially T-shaped. The sensor output shaft 95 is rotatably assembled inside the housing 10 with the end of the connecting shaft 95a facing away from the first bottom portion 12 of the first case 11. As shown in FIG. 2A, the sensor output shaft 95 is connected to the outside of the housing 10 through a third output hole 52c formed in a portion of the second bottom 52 of the second case 51 facing the sensor output shaft 95. Is exposed. The third output hole 52 c has a circular shape that is substantially equal to the outer diameter of the sensor output shaft 95. Further, the connecting shaft 95 a protrudes from the third output hole 52 c to the outside of the housing 10. As shown in FIG. 1, a link member 101 that constitutes a link mechanism that operates the air passage switching door is connected to the connecting shaft 95 a that protrudes outside the housing 10. The link member 101 has a circular gear shape. In the central portion of the link member 101 in the radial direction, a connecting hole 101a is formed in which the shape viewed from the axial direction of the link member 101 is substantially T-shaped corresponding to the outer diameter shape of the connecting shaft 95a. . The link member 101 is connected to the sensor output shaft 95 so as to be integrally rotatable by inserting the connection shaft 95a into the connection hole 101a. The link member 101 connected to the sensor output shaft 95 is disposed outside the housing 10 and meshes with the small diameter gear 94b of the output gear 94 outside the housing 10. That is, the output gear 94 is connected to the air passage switching door via a link mechanism including the link member 101.

  In the second output group 91 as described above, when the motor 92 is operated, the rotation of the rotating shaft 92 b is transmitted to the worm 93. The rotation transmitted to the worm 93 is output from the small diameter gear 94 b of the output gear 94. Then, the link member 101 meshed with the small diameter gear 94b of the output gear 94 is rotated, and the air passage switching door is driven by the link mechanism including the link member 101. At this time, the link member 101 rotates integrally with the sensor output shaft 95 while being supported by the sensor output shaft 95. Accordingly, the rotation of the motor 92 transmitted to the output gear 94 is transmitted to the sensor output shaft 95 via the link member 101. In the second output group 91, the last reduction gear corresponds to the sensor output shaft 95 that is the last component that is rotatably supported by the housing 10 and to which the rotation of the motor 92 is transmitted.

  In addition, a circuit board 111 as a drive circuit unit is accommodated in the housing 10. The circuit board 111 has a flat plate shape. The circuit board 111 is disposed on the first bottom portion 12 on the connector portion 72 side of the reduction gear and between the motor 82 and the motor 92 and the connector portion 72. It is fixed.

  A first position detection sensor 121 for detecting the rotational position of the output gear 86 is mounted on the output gear 86 of the first output group 81. The first position detection sensor 121 is disposed between the output gear 86 and the first bottom portion 12. The first position detection sensor 121 is electrically connected to the circuit board 111 via a bus bar member 131 as a sensor signal transmission member disposed on the first bottom 12 inside the housing 10, and outputs A pulse signal as a position detection signal corresponding to the rotational position of the gear 86 is output via the bus bar member 131. A second position detection sensor 122 for detecting the rotational position of the sensor output shaft 95 is mounted on the sensor output shaft 95 of the second output group 91. The second position detection sensor 122 is disposed between the sensor output shaft 95 and the first bottom portion 12. The second position detection sensor 122 is electrically connected to the circuit board 111 through the bus bar member 131 inside the housing 10, and a pulse as a position detection signal corresponding to the rotational position of the output gear 94. A signal is output via the bus bar member 131. The bus bar member 131 according to the present embodiment includes a plurality of conductive terminals 132 that transmit each pulse signal, and an insulating member 133 that holds the terminals 132 in an insulated state. The terminal 132 is insert-molded on the insulating member 133. Further, the bus bar member 131 of the present embodiment is connected to the circuit board 111 through the two motors 82 and 92.

  The circuit board 111 is provided with a pair of power supply terminals 141 for supplying power to the motor 82 and a pair of power supply terminals 142 for supplying power to the motor 92. The pair of power supply terminals 141 are provided in the vicinity of the axial end of the motor 82 opposite to the side from which the rotating shaft 82b protrudes, and are pressed against the motor-side power supply terminals of the motor 82 to thereby provide the motor-side power supply terminals. Is electrically connected. Similarly, the pair of power supply terminals 142 is provided in the vicinity of the axial end of the motor 92 opposite to the side from which the rotating shaft 92b protrudes, and is pressed against the motor-side power supply terminal of the motor 92 to thereby press the motor. It is electrically connected to the side power supply terminal.

  A plurality of the connector terminals 41 are connected to the circuit board 111. The plurality of connector terminals 41 are electrically connected to an external connector (not shown) inserted into the connector portion 72. Electric power is supplied to the motor actuator 1 through this external connector, exchange of electric signals with an external device mounted on the vehicle, and the like.

  The circuit board 111 is mounted with a driving IC 151 for controlling the driving of the motors 82 and 92 and thus the driving of the motor actuator 1. The drive IC 151 supplies power to the motor 82 and the motor 92 based on the electrical signal input from the external device via the external connector and the electrical signal input from the first position detection sensor 121 and the second position detection sensor 122. To control.

  Here, the housing 10 has a reduction gear (that is, a first reduction gear 84, a second reduction gear 85, an output gear 86, a worm 93, an output gear 94, and a sensor output shaft 95) side from the circuit board 111 side. A wall portion 161 is provided for preventing the intrusion of oil such as grease.

  The wall portion 161 of the present embodiment is provided so as to divide a substantial center in the housing 10 to form a gear chamber 162 and a circuit chamber 163. Moreover, the wall part 161 of this embodiment has divided | segmented the approximate center in the housing 10 via the part of the said motor support parts 12a and 12c.

  As shown in FIGS. 3, 5, and 6, the wall 161 of the present embodiment has the tip pressed against the bus bar member 131 in a state where the first case 11 and the second case 51 are assembled. It has a pressing wall portion 164 for preventing an oil agent such as grease from entering along the bus bar member 131. A pressing tip thin portion 165 whose thickness decreases toward the tip (in the state before assembly) is provided at the tip of the pressing wall 164.

  Specifically, as shown in FIGS. 4, 6, 7, and 8, the first case 11 is first formed with a mounting convex portion 166 on which the bus bar member 131 can be mounted. The top portion of the mounting convex portion 166 is formed in a planar shape with the same width as the insulating member 133 so as to come into surface contact with the planar bottom surface of the insulating member 133 in the bus bar member 131. And the said press wall part 164 is formed in the position facing the said mounting convex part 166 in the 2nd case 51, and in the state which assembled | attached the 1st case 11 and the 2nd case 51, the press tip thin part of the front-end | tip 165 and the placement protrusion 166 are provided so as to sandwich and press the insulating member 133 in the bus bar member 131. In addition, when the pressing tip thin part 165 is pressed and contacted, the tip is appropriately crushed so that the pressing contact is good. Moreover, in FIG. 7, the front-end | tip before being crushed of the pressing tip thin part 165 is typically illustrated with a broken line.

  Further, as shown in FIGS. 5, 8, and 9, protruding side portions 167 that protrude outward from both sides of the bus bar member 131 are formed on both side portions of the pressing wall portion 164. As shown in FIGS. 6 and 9, the first case 11 has a side receiving side wall 168 formed at a position corresponding to the protruding side portion 167, and the side case receiving side wall 168 includes a first case. 11 and the second case 51 are assembled to form a side receiving groove 169 that surrounds the protruding side 167. The side accommodating groove 169 is formed so as to cover the outer end surface of the protruding side portion 167, the end surface on the gear chamber 162 side, and the end surface on the circuit chamber 163 side.

  Further, as shown in FIGS. 5 and 8, the protruding side portion 167 is formed with a side protruding portion 170 that protrudes further than the pressing tip thin portion 165. As shown in FIG. 8, the side protrusion 170 is disposed on the side of the bus bar member 131 in a state where the first case 11 and the second case 51 are assembled.

  As shown in FIGS. 3, 4, and 10, the wall portion 161 is provided in the first and second cases 11 and 51, and the first case 11 and the second case 51 are assembled to each other. It has first and second crank wall portions 173 and 174 formed with crank facing surfaces 171 and 172 facing each other in a crank shape. The first and second crank wall portions 173 and 174 include a motor support portion 12a portion, a pressing wall portion 164, a placement convex portion 166, a side accommodating side wall 168 portion, and a motor support portion 12c portion. Except (intervening), it is formed so as to divide substantially the center in the housing 10.

  Specifically, as shown in FIG. 4, first, a first crank wall 173 is erected on the first bottom portion 12 of the first case 11. As shown in FIG. 10, the crank opposing surface 172 on the second crank wall portion 174 side in a state where the first case 11 and the second case 51 are assembled to the distal end portion of the first crank wall portion 173. A crank facing surface 171 facing the crank is formed. That is, at the front end portion of the first crank wall portion 173, two planes parallel to the first bottom portion 12 and having a step and a plane perpendicular to the first bottom portion 12 connecting the planes are formed. Thus, a crank facing surface 171 is formed. The crank facing surface 171 of the first crank wall portion 173 is formed with a high flat surface on the circuit chamber 163 side (lower side in FIG. 1).

  As shown in FIG. 3, a second crank wall portion 174 is erected on the second bottom portion 52 of the second case 51. As shown in FIG. 10, the crank opposing surface 171 on the first crank wall portion 173 side in a state where the first case 11 and the second case 51 are assembled to the tip portion of the second crank wall portion 174. A crank facing surface 172 that is opposed to the crank shape is formed. That is, at the front end portion of the second crank wall portion 174, two planes parallel to the second bottom portion 52 and having a step and a plane perpendicular to the second bottom portion 52 connecting the planes are formed. Thus, a crank facing surface 172 is formed. The crank facing surface 172 of the second crank wall portion 174 is formed with a low flat surface on the circuit chamber 163 side.

  As shown in FIG. 10, when the first case 11 and the second case 51 are assembled, the crank facing surfaces 171 and 172 are opposed to each other in the form of a crank, and abut in the assembling direction. Infiltration of the oil from the gear chamber 162 side to the circuit chamber 163 side is prevented.

Next, the operation of the motor actuator configured as described above will be described.
The motor actuator 1 as described above is fixed to the vehicle with the opening of the connector portion 72 facing downward, for example, in order to prevent water from accumulating inside the connector portion 72. The oil such as grease used for the reduction gear on the gear chamber 162 side (that is, the first reduction gear 84, the second reduction gear 85, the output gear 86, the worm 93, the output gear 94, and the sensor output shaft 95) Although it tends to go to the lower circuit board 111 side due to vibration or the like, the wall 161 prevents entry into the circuit chamber 163 side. Therefore, the oil agent such as grease is prevented from adhering to the circuit board 111, and a short circuit or the like based on the oil agent is prevented, and malfunction of the circuit board 111 is prevented.

Next, the characteristic effects of the above embodiment will be described below.
(1) Since the wall portion 161 is provided in the housing 10 for preventing the intrusion of the oil agent from the reduction gear side to the circuit board 111 side, the oil agent such as grease used for the reduction gear is applied to the circuit board 111. Adhesion is prevented, and malfunction of the circuit board 111 based on the adhesion can be prevented.

  (2) The wall portion 161 has its tip pressed against the bus bar member 131 in a state where the first case 11 and the second case 51 are assembled, and prevents an oil agent such as grease from entering along the bus bar member 131. Therefore, the oil agent can be prevented from entering the portion only by assembling the first and second cases 11 and 51. Moreover, since the tip end of the pressing wall 164 is provided with a pressing tip thin portion 165 that becomes thinner toward the tip (in a state before assembly), the tip end when the pressing tip thin portion 165 comes into press contact. Is appropriately crushed so that the oil agent can be blocked by making good pressure contact while absorbing dimensional errors between the bus bar member 131 and the first and second cases 11 and 51. That is, if the pressing tip thin portion 165 is not provided, the pressing wall portion 164 is brought into good contact with the bus bar member 131 unless the dimensional accuracy of the bus bar member 131 and the first and second cases 11 and 51 is increased. It is difficult to solve this problem.

  Further, since the insulating member 133 of the bus bar member 131 is sandwiched between the pressing tip thin portion 165 and the mounting convex portion 166 of the pressing wall portion 164 with the first case 11 and the second case 51 assembled, the housing 10 For example, even if the output gear 86 and the like are locked and stress is generated, the bending of the housing 10 (first and second cases 11 and 51) is suppressed. As a result, for example, stress is not easily applied to the joint between the first and second position detection sensors 121 and 122 and the bus bar member 131 and the joint between the bus bar member 131 and the circuit board 111, and the joint is damaged. A conduction failure can be suppressed.

  (3) Protruding side portions 167 are formed on both sides of the pressing wall portion 164 provided in the second case 51 so as to protrude outward from both sides of the bus bar member 131 to be pressed and contacted. The first case 11 is formed with a side receiving groove 169 that surrounds the protruding side 167 in a state where the first case 11 and the second case 51 are assembled. The oil agent can be prevented from entering along both side portions of the pressing wall portion 164 simply by assembling.

  (4) Since the protruding side portion 167 is formed with a side protruding portion 170 that protrudes from the pressing tip thin portion 165, the protruding side portion 167 is disposed on the side portion of the bus bar member 131 and allows the oil agent to enter along the side portion. Can be suppressed.

  (5) Since the bus bar member 131 includes a plurality of conductive terminals 132 that transmit pulse signals and an insulating member 133 that holds the terminals 132 in an insulated state, the handling of the plurality of terminals 132 is facilitated. The motor actuator 1 can be easily assembled. Moreover, since the pressing wall portion 164 is pressed against the insulating member 133, the pressing wall portion 164 can be easily brought into close contact without damaging the terminal 132.

  (6) The wall portion 161 is provided with the first and second cases 11 and 51 and is formed with crank facing surfaces 171 and 172 that face each other in a crank shape in a state where the first case 11 and the second case 51 are assembled. Further, since the first and second crank wall portions 173 and 174 are provided, the oil agent can be prevented from entering the portion only by assembling the first and second cases 11 and 51.

The above embodiment may be modified as follows.
In the above embodiment, the pressing wall portion 164 provided with the pressing tip thin portion 165 is provided in the second case 51, but is provided in at least one of the bus bar member 131, the first case 11, and the second case 51. It suffices that the front end of the first case 11 and the second case 51 are pressed against other members to prevent oil from entering along the bus bar member 131.

  For example, as shown in FIG. 11, a pressing wall portion 182 in which a pressing tip thin portion 181 is provided on the insulating member 133 of the bus bar member 131 may be integrally formed. The pressing tip thin portion 181 of the pressing wall portion 182 presses and contacts the second case 51 in a state where the first case 11 and the second case 51 are assembled to prevent the oil agent from entering along the bus bar member 131. In addition, in FIG. 11, the front-end | tip before being crushed of the pressing point thin part 181 is typically shown with the broken line. Even if it does in this way, the effect similar to the said embodiment can be acquired.

  In the above embodiment, the sensor signal transmission member is the bus bar member 131 in which the terminal 132 is insert-molded on the insulating member 133. However, the sensor signal transmission member is not limited to this and may be changed to another sensor signal transmission member.

  For example, as shown in FIG. 12, the sensor signal transmission member may be changed to a substrate 183 provided with a conductor pattern (not shown). Even if it does in this way, the effect similar to the said embodiment can be acquired.

  In the above embodiment, the wall portion 161 has the pressing wall portion 164 and the first and second crank wall portions 173 and 174. However, the wall portion 161 prevents the oil agent from entering from the reduction gear side to the circuit board 111 side. If possible, they may be changed to walls of other configurations.

  -In the said embodiment, although the pressing tip thin part 165 was formed in the pressing wall part 164, if it can be made to press-contact favorable, it will change into the pressing wall part in which the pressing tip thin part is not formed. Also good.

  In the above embodiment, the protruding side portions 167 are formed on both sides of the pressing wall portion 164 provided in the second case 51, and the side receiving grooves 169 surrounding the protruding side portion 167 are formed in the first case 11. However, it may be changed to another configuration as long as the infiltration of the oil along the both side portions of the pressing wall portion 164 can be suppressed.

  -In the said embodiment, although the side protrusion part 170 was formed in the protrusion side part 167, if it can suppress infiltration of the oil agent along the side part of the bus-bar member 131, even if it changes into another structure Good.

  In the above embodiment, two first and second output groups 81 and 91 are accommodated in the housing 10. However, the number of output groups accommodated in the housing 10 is not limited to this. That is, only one output group may be accommodated in the housing 10, or three or more output groups may be accommodated.

  In the above embodiment, the first output group 81 includes one motor 82 and four reduction gears (that is, the worm 83, the first reduction gear 84, the second reduction gear 85, and the output gear 86). The second output group 91 includes one motor 92 and three reduction gears (that is, a worm 93, an output gear 94, and a sensor output shaft 95). However, as long as the first output group 81 and the second output group 91 are composed of one motor and at least one reduction gear that decelerates and outputs the rotation of the motor, the configuration is not limited to the configuration of the above embodiment. Absent.

  DESCRIPTION OF SYMBOLS 10 ... Housing, 11 ... 1st case, 51 ... 2nd case, 82, 92 ... Motor, 83, 93 ... Worm (reduction gear), 84 ... 1st reduction gear (reduction gear), 85 ... 2nd reduction gear ( Reduction gear), 86, 94 ... Output gear (reduction gear), 95 ... Sensor output shaft (reduction gear), 111 ... Circuit board (drive circuit unit), 121, 122 ... First and second position detection sensors (position detection) Sensor), 131 ... Bus bar member (sensor signal transmission member), 132 ... Terminal, 133 ... Insulating member, 161 ... Wall portion, 164,182 ... Pressing wall portion, 165,181 ... Pressing tip thin portion, 167 ... Protruding side portion 169, side receiving grooves, 170, side protrusions, 171, 172, crank facing surfaces, 173, first crank wall portion, 174, second crank wall portion, 183, substrate (sensor signal transmission member).

Claims (5)

A motor, a reduction gear that decelerates and outputs the rotation of the motor, and a drive circuit unit that controls driving of the motor are housed in a housing,
In the housing, a motor actuator provided with a wall portion for preventing oil from entering from the reduction gear side to the drive circuit portion side ,
A position detection sensor that outputs a position detection signal corresponding to the rotational position of at least one of the reduction gears;
A sensor signal transmission member for transmitting the position detection signal output from the position detection sensor to the drive circuit unit;
The housing is composed of a first case and a second case that are assembled to each other.
The wall portion is provided on at least one of the sensor signal transmission member, the first case, and the second case, and a tip is pressed against another member in a state where the first case and the second case are assembled. A pressing wall portion for preventing the intrusion of the oil along the sensor signal transmission member, and a tip end portion of the pressing wall portion is provided with a pressing tip thin portion that becomes thinner toward the tip end. Characteristic motor actuator. The motor actuator according to claim 1 , wherein
The pressing wall portion is provided in any one of the first case and the second case and is pressed into contact with the sensor signal transmission member,
Protruding side portions that protrude outward from both sides of the sensor signal transmission member are formed on both side portions of the pressing wall portion, and either the first case or the second case is provided on the other side of the first case or the second case. A motor actuator, wherein a side housing groove is formed to surround the protruding side portion in a state where two cases are assembled. The motor actuator according to claim 2 ,
The motor actuator according to claim 1, wherein a side protruding portion that protrudes from the pressing tip thin portion is formed on the protruding side portion. The motor actuator according to claim 2 or 3 ,
The sensor signal transmission member includes a plurality of conductive terminals that transmit the position detection signal, and an insulating member that holds the terminals in an insulated state.
The motor actuator according to claim 1, wherein the pressing wall portion is pressed against the insulating member. The motor actuator according to any one of claims 1 to 4 ,
The housing is composed of a first case and a second case that are assembled to each other.
The wall portion is provided in the first and second cases, and is formed with a crank facing surface opposed to each other in a crank shape in a state in which the first case and the second case are assembled to prevent the oil agent from entering. And a second crank wall portion.