JP6340525B2 - Motor actuator - Google Patents

Description

  The present invention relates to a motor actuator.

  Patent Document 1 below discloses a motor actuator (actuator device) that is used to open and close a ventilation path switching door that constitutes a part of a vehicle air conditioner. The motor actuator includes a case that forms an outer shell of the motor actuator, and a motor that is supported by a support portion provided in the case. In addition, a power supply member (connector assembly) for supplying power to the motor is attached to the case, and a connection portion (a first power supply terminal and a second power supply terminal) connected to the power supply terminal of the motor is attached to the power supply member. Power supply terminal). And in the motor actuator described in the following patent document 1, the motor power supply terminal and the connection part of the power supply member are connected by attaching the motor to the support part of the case.

JP 2012-90510 A

  However, the configuration described in Patent Document 1 is a useful technique from the viewpoint that the connection between the power supply terminal of the motor and the connection portion of the power supply member can be easily performed, but the motor is used as the support portion of the case. When mounting, if the positional relationship between the power supply terminal of the motor and the connection part of the power supply member is displaced, the connection state (contact state) between the power supply terminal of the motor and the connection part of the power supply member does not become the desired connection state. Can be considered. That is, it is conceivable that a contact failure occurs between the power supply terminal of the motor and the connection portion of the power supply member.

  In view of the above fact, an object of the present invention is to obtain a motor actuator capable of preventing a contact failure between a power feeding terminal of a motor and a connecting portion of a power feeding member.

The motor actuator according to claim 1 is a power supply terminal formed in a plate shape, a rotating shaft that rotates when the power supply terminal is energized, and a supported portion that is provided on both sides in the axial direction of the rotating shaft. And a case having a support part that accommodates the motor inside and supports the supported part, and the power supply terminal is connected when the supported part is supported by the support part. In a state where the support center of the support portion and the rotation shaft overlap with each other when viewed in the axial direction, and the power supply terminal and the connection portion are not in contact with each other, A power supply member, wherein a distance from the support center to a radially outer end of the power supply terminal is set to be longer than a distance from the support center to the radially outer end of the power supply terminal, and the connection part is a first component piece And by the second component Made, the open end side of the connecting portion is a guide portion for gradually widening toward the opening direction of the connection portion, the object together with the can and the supported portion and the support portion are overlapped as viewed in the axial direction Both ends in the width direction, which are set so that the power supply terminal abuts on the guide portion and is orthogonal to the thickness direction of the power supply terminal, in a state before the support portion is completely supported by the support portion. The portion is sandwiched between the first component piece and the second component piece while being in contact with the first component piece and the second component piece .

  According to the motor actuator of the first aspect, the rotating shaft rotates by energizing the motor through the power supply terminal. That is, the motor actuator operates. In the present motor actuator, the distance to the radially outer end of the connecting portion with respect to the support center and the distance to the radially outer end of the power supply terminal are set as described above. Thus, when the motor is attached to the case, that is, when the supported portion of the motor is supported by the support portion of the case, the motor power supply terminal can be reliably brought into contact with the desired position of the connection portion of the power supply member. it can. Thereby, it is possible to prevent poor contact between the power supply terminal of the motor and the connection portion of the power supply member in a state where the supported portion of the motor is supported by the support portion of the case.

Further , according to the motor actuator of the first aspect , the supported portion of the motor and the supporting portion of the case are overlapped with each other in the axial direction and in a state before the support of the supported portion to the supporting portion is completed. That is, in a state where the supported portion of the motor is started to be assembled to the support portion of the case, the power supply terminal contacts the guide portion. And since the said guide part is formed as mentioned above, an electric power feeding terminal is guided to a predetermined position. Thereby, the poor contact between the power feeding terminal of the motor and the connecting portion of the power feeding member can be prevented.

A motor actuator according to a second aspect is the motor actuator according to the first aspect , wherein a distance between the support portion and the connection portion is set shorter than a width of the power supply terminal.

According to the motor actuator of the second aspect, when the supported portion of the motor is assembled to the support portion of the case, the motor power supply terminal is prevented from entering between the support portion of the case and the connection portion of the power supply member. be able to. Thereby, the poor contact between the power feeding terminal of the motor and the connecting portion of the power feeding member can be prevented.

It is a disassembled perspective view which decomposes | disassembles and shows the motor actuator of this embodiment. It is a perspective view which shows a motor, a counter gear, a final gear, etc. It is an expansion perspective view which expands and shows the motor accommodated in the lower case. It is a front view which shows the motor, case, and electric power feeding terminal unit in the state which starts assembling the to-be-supported part of a motor to the support part of a case. It is a front view which shows the motor, case, and electric power feeding terminal unit in the state which assembled the to-be-supported part of the motor to the support part of the case.

  A motor actuator according to an embodiment of the present invention will be described with reference to FIGS. In addition, the arrow Z direction, the arrow R direction, and the arrow C direction that are appropriately shown in the drawing indicate the axial direction, radial direction, and circumferential direction of the motor, respectively. In the following description, when only the axial direction, radial direction, and circumferential direction are indicated, the axial direction, radial direction, and circumferential direction of the motor are indicated unless otherwise specified.

  As shown in FIG. 1, the motor actuator 10 according to the present embodiment has a case 12 that forms an outline of the motor actuator 10, a motor 14 that is arranged in the case 12, and a predetermined rotation speed of the motor 14. Primary gear 16, counter gear 18, and final gear 20 that decelerate at a reduction ratio of 5 and a power supply terminal unit 22 as a power supply member for supplying power to motor 14. An insulating plate 24 is provided between the motor 14 and the power supply terminal unit 22.

  The case 12 includes a lower case 26 and an upper case 28 that can be divided in the axial direction of the final gear 20 described later. The lower case 26 is formed in a bottomed box shape in which the upper case 28 side is opened. The lower case 26 has a bottom wall 26A extending along the axial direction of the motor 14 and an upper end from the outer peripheral end of the bottom wall 26A. And a side wall 26B that bends and extends toward the case 28 side. The bottom wall 26A is formed with an insertion hole 26C through which the output shaft 50 provided at the axial center portion of the final gear 20 is inserted, and the bottom wall 26A has a supported portion of the motor 14 described in detail later. A pair of support portions A1 and A2 that support 38A and 40B, and cylindrical shaft support portions 26D and 26E that support the primary gear 16 and the counter gear 18 are provided upright. The side wall 26B is provided with a connector portion 26F to which an external connector is connected.

  The upper case 28 is formed in a bottomed box shape with the lower case 26 side open, and the upper case 28 includes a top wall 28A and a side wall 28B corresponding to the bottom wall 26A and the side wall 26B of the lower case 26. Yes. The top wall 28A and the side wall 28B are provided with a pair of support portions B1, B2 and a connector portion 28C corresponding to the support portions A1, A2 and the connector portion 26F provided on the lower case 26, and the top wall 28A is provided with a bearing portion 28D that supports one end of the output shaft 50 provided in the axial center portion of the final gear 20.

  The motor 14 includes a rotor 32 that can rotate integrally with the rotary shaft 30 and an outer portion 34 that includes the rotor 32 therein. Specifically, the outer portion 34 of the motor 14 includes a housing 36 as an outer peripheral portion formed in a cylindrical shape, and end plates 38 and 40 that close both ends of the housing 36. The housing 36 is formed using a magnetic material, and a segment magnet (not shown) is fixed to the inner peripheral surface of the housing 36. The housing 36 and the segment magnet constitute a stator of the motor 14. Further, a supported portion 38A protruding toward the one axial side is provided at the axial center portion of the end plate 38 provided on the one axial side. The supported portion 38A includes a rotating shaft. An insertion hole 38B through which 30 is inserted is formed. Further, the rotary shaft 30 inserted through the insertion hole 38B protrudes toward one side in the axial direction, and a worm gear 44 is fixed via a collar 42 at the distal end side in the protruding direction of the rotary shaft 30.

  The end plate 40 provided on the other side in the axial direction has a base wall portion 40A formed in an annular shape and a supported portion 40B provided in the center of the base wall portion 40A. Yes. The supported portion 40B protrudes toward the other side in the axial direction with respect to the base wall portion 40A and has a circular outer edge in the radial direction when viewed in the axial direction. In addition, an end portion on the other side in the axial direction of the rotating shaft 30 is pivotally supported at the center of the supported portion 40B. In the state where the end plate 40 described above closes the end portion on the other axial side of the housing 36, the base wall portion 40 </ b> A of the end plate 40 is on the one axial side with respect to the end 36 </ b> A on the other axial side of the housing 36. Further, the supported portion 40B of the end plate 40 protrudes from the other end 36A of the housing 36 in the axial direction on the other side in the axial direction.

  The base plate 40A of the end plate 40 is provided with a pair of power supply terminals 46 and 47 connected to a brush (not shown). The power supply terminals 46 and 47 are formed in a rectangular plate shape and project toward the other side in the axial direction with respect to the base wall portion 40A. Further, the power supply terminal 46 and the power supply terminal 47 are arranged to face each other across the rotation axis when viewed in the axial direction, and the plate thickness direction of the power supply terminal 46 and the power supply terminal 47 substantially coincides with the circumferential direction. .

  An O-ring 48 formed in an annular shape when viewed in the axial direction is attached to the outer peripheral side of the supported portions 38A, 40B of the motor 14 described above. The O-ring 48 is supported by the supported portions 38A, 40B of the motor 14. The supported portions 38A and 40B of the motor 14 are supported by the support portions A1 and A2 and the support portions B1 and B2 provided on the lower case 26 and the upper case 28, respectively. That is, the O ring 48 is interposed between the supported portions 38A, 40B of the motor 14 and the support portions A1, A2, B1, B2 of the case 12, so that the motor 14 is floatingly supported by the case 12. Yes. The O-ring 48 is assumed to be included in the portions supported by the support portions A1 and A2 and the support portions B1 and B2, that is, the supported portions 38A and 40B.

  The rotation of the rotating shaft 30 of the motor 14 described above is transmitted to the output shaft 50 via the worm gear 44, the primary gear 16, the counter gear 18, and the final gear 20.

The primary gear 16 is disposed on the same axis as the first gear 16A in which a worm gear 44 fixed to the rotating shaft 30 of the motor 14 is engaged, and is coaxially disposed with the first gear 16A and can rotate integrally with the first gear 16A. A second gear 16B. Further, the primary gear 16 is pivotally supported by a shaft support portion 26 </ b> D provided in the lower case 26. The second gear 16B has a smaller diameter than the first gear 16A.

The counter gear 18 is disposed on the same axis as the first gear 18A that meshes with the second gear 16B of the primary gear 16, is coaxially disposed with the first gear 18A, and can rotate integrally with the first gear 18A. And a second gear 18B. Further, the counter gear 18 is pivotally supported by a shaft support portion 26 </ b> E provided in the lower case 26. The second gear 18B has a smaller diameter than the first gear 18A.

  The final gear 20 meshes with the second gear 18B of the counter gear 18, and the output shaft 50 is fixed to the shaft center portion of the final gear 20 by insert molding, press fitting, or the like. A washer 51 is inserted through the output shaft 50.

  Next, the power supply terminal unit 22 that is a main part of the present embodiment will be described.

  The power supply terminal unit 22 includes connection parts 220 and 226 connected to the power supply terminals 46 and 47 of the motor 14 and a connected part 228 to which a terminal of an external connector (not shown) is connected. The power supply terminal unit 22 is supported by a support member 52 formed using an insulating material. The power supply terminal unit 22 is fixed to the lower case 26 by fixing the support member 52 to the lower case 26.

  As shown in FIGS. 4 and 5, the connecting portion 220 is formed by pressing a copper plate or the like, and the connecting portion 220 includes the first component piece 222 and the second component piece 224. It is constituted by. The first component piece 222 includes a base portion 222A extending from the support member 52 toward the motor 14 in a state where the power supply terminal unit 22 is fixed to the lower case 26, and a support portion A2 side as viewed in the axial direction from the tip of the base portion 222A. And a first guide part 222C as a guide part that bends and extends toward the support part A2 from the tip of the first sandwiching part 222B. . The second component piece 224 includes a base 224A extending from the support member 52 toward the motor 14 and a second sandwiching portion bent in a convex shape toward the opposite side of the support A2 from the distal end of the base 224A. 224B, and a second guide portion 224C as a guide portion that bends and extends from the tip of the second holding portion 224B toward the opposite side of the support portion A2.

  The connection part 220 includes the first component piece 222 and the second component piece 224, so that the motor 14 side is opened in the axial direction, whereby the first component piece 222, the second component piece 224, The power supply terminal 46 of the motor 14 is inserted between the power supply terminal 46 and the power supply terminal 46 is sandwiched between the first sandwiching portion 222B of the first component piece 222 and the second sandwiching portion 224B of the second component piece 224. It is possible. Further, the power feeding terminal 46 is sandwiched between the first sandwiching portion 222B of the first component piece 222 and the second sandwiching portion 224B of the second component piece 224, whereby the connection portion 220 of the power feeding terminal 46 of the motor 14 is reached. Connection is to be completed.

  Further, in the present embodiment, by having the first guide portion 222C of the first component piece 222 and the second component piece 224 and the second guide portion 224C, the open end side of the connection portion 220 is in the opening direction of the connection portion 220. It is gradually widening towards. A distance W1 from the tip of the first guide part 222C to the tip of the second guide part 224C is set longer than the width W2 of the power supply terminals 46 and 47.

  In addition, since the connection part 226 is the same as the structure of the said connection part 220, about the description of the connection part 226, the same code | symbol as the said connection part 220 is attached | subjected and it abbreviate | omits.

  The support portion A2 is disposed between the connection portion 220 and the connection portion 226 described above, and when the supported portions 38A and 40B of the motor 14 are supported by the support portions A1 and A2, the power supply terminal of the motor 14 is provided. 46 and 47 are connected to the connecting portions 220 and 226 of the power supply terminal unit 22.

  As shown in FIG. 4, in the present embodiment, the support center S of the support portion A <b> 2 and the rotating shaft 30 of the motor 14 overlap with each other when viewed in the axial direction, and the power supply terminals 46 and 47 of the motor 14. In the state where the connection portions 220 and 226 of the power supply terminal unit 22 are not in contact with each other, the distance L1 from the support center S to the radially outer end of the connection portion 220, that is, the second guide portion 224C from the support center S. The position or the like of the connecting portion 220 is set so that the distance L1 to the tip of the terminal is longer than the distance L2 from the support center S to the radially outer end of the power supply terminal 46.

  The distance L1 from the support center S to the radially outer end of the connection portion 226, that is, the distance L1 from the support center S to the tip of the second guide portion 224C is the radial direction of the power supply terminal 47 from the support center S. The position of the connecting portion 226 is set so as to be longer than the distance L2 to the outer end. Note that the support center S is the same direction as the direction in which the support portion A2 extends through the shaft center of the rotating shaft 30 of the motor 14 in a state where the supported portion 40B of the motor 14 is supported by the support portion A2. The extended line shall be said.

  Further, the supported portion 40B and the supporting portion A2 are overlapped in the axial direction and are in a state before the support of the supported portion 40B to the supporting portion A2 is completed, that is, the O attached to the supported portion 40B. In a state in which the ring 48 starts to contact the support portion A2, the connection portion 220 so that the power supply terminals 46 and 47 of the motor 14 contact the first guide portion 222C and the second guide portion 224C of the connection portions 220 and 226. 226, the lengths of the base portions 222A and 224A are set.

  In this embodiment, the distance W3 between the support portion A2 and the connection portion 220, that is, the distance W3 between the support portion A2 and the tip of the first guide portion 222C is set to be shorter than the width W2 of the power supply terminal 46. In addition, the distance W3 between the support portion A2 and the connection portion 226, that is, the distance W3 between the support portion A2 and the tip of the first guide portion 222C is set to be shorter than the width W2 of the power supply terminal 47.

(Operation and effect of this embodiment)
Next, the operation and effect of this embodiment will be described.

  As shown in FIG. 1, according to the motor actuator 10 of the present embodiment, the rotating shaft 30 rotates by energizing the motor 14 through the power supply terminals 46 and 47. The rotation of the rotary shaft 30 is transmitted to the output shaft 50 through the worm gear 44, the primary gear 16, the counter gear 18, and the final gear 20. That is, the motor actuator 10 operates.

  Here, as shown in FIGS. 4 and 5, in this embodiment, the distance L1 to the radially outer end of the connecting portions 220 and 226 with respect to the support center S and the radially outer ends of the power supply terminals 46 and 47 are shown. Is set as described above. Accordingly, when the motor 14 is attached to the lower case 26, that is, when the supported portion 40 </ b> B of the motor 14 is supported by the support portion A <b> 2 of the lower case 26, the power supply terminal 46 of the motor 14 is connected to the power supply terminal unit 22. The desired positions of the portions 220 and 226 can be reliably brought into contact with. This prevents poor contact between the power supply terminals 46 and 47 of the motor 14 and the connection parts 220 and 226 of the power supply terminal unit 22 when the supported part 40B of the motor 14 is supported by the support part A2 of the lower case 26. be able to.

  Further, in the present embodiment, in a state where the O-ring 48 attached to the supported portion 40B starts to contact the supporting portion A2, the power supply terminals 46 and 47 of the motor 14 and the first guide portion 222C of the connecting portions 220 and 226 are provided. The second guide portion 224C comes into contact with the second guide portion 224C. In the process until the support of the supported portion 40B to the support portion A2 is completed, the power supply terminals 46 and 47 are guided between the first holding portion 222B and the second holding portion 224B. Thereby, poor contact between the power supply terminals 46 and 47 of the motor 14 and the connection portions 220 and 226 of the power supply terminal unit 22 can be prevented.

  Furthermore, in this embodiment, the distance W3 between the support part A2 and the connection part 220 and the distance W3 between the support part A2 and the connection part 226 are set to be shorter than the width W2 of the power supply terminals 46 and 47. Thus, when the supported portion 40B of the motor 14 is assembled to the support portion A2 of the lower case 26, the power supply terminals 46 and 47 of the motor 14 are connected to the support portion A2 of the lower case 26 and the connection portions 220 and 226 of the power supply terminal unit 22. Can be prevented from entering between. Thereby, poor contact between the power supply terminals 46 and 47 of the motor 14 and the connection portions 220 and 226 of the power supply terminal unit 22 can be prevented.

  In the present embodiment, an example in which the distance W3 between the support portion A2 and the connection portion 220 and the distance W3 between the support portion A2 and the connection portion 226 are set shorter than the width W2 of the power supply terminals 46 and 47 will be described. However, the present invention is not limited to this. Whether or not the distance W3 between the support portion A2 and the connection portion 220 and the distance W3 between the support portion A2 and the connection portion 226 are set to be shorter than the width W2 of the power supply terminals 46 and 47 is determined. May be appropriately set in consideration of the trajectory of the power supply terminals 46 and 47 when the support portion A2 is supported.

  Although one embodiment of the present invention has been described above, the present invention is not limited to the above, and various modifications other than the above can be implemented without departing from the spirit of the present invention. Of course.

DESCRIPTION OF SYMBOLS 10 ... Motor actuator, 12 ... Case, 14 ... Motor, 22 ... Feed terminal unit (feed member), 30 ... Rotating shaft, 38A ... Supported part, 40B ... Supported part, 46 ... Feed terminal, 47 ... Feed terminal, 220 ... connection part, 222 C ... first guide part (guide part), 224 C ... second guide part (guide part), 226 ... connection part, S ... support center

Claims (2)

A motor having a power supply terminal formed in a plate shape, a rotation shaft that rotates when the power supply terminal is energized, and supported portions respectively provided on both sides in the axial direction of the rotation shaft;
A case having a support portion that accommodates the motor and supports the supported portion;
A connection part to which the power supply terminal is connected when the supported part is supported by the support part; and a support center of the support part and the rotating shaft are overlapped in an axial view; and The distance from the support center to the radially outer end of the connection portion is the distance from the support center to the radially outer end of the feed terminal in a state where the power supply terminal and the connection portion are not in contact with each other. A power supply member set longer than
With
The connection portion is constituted by a first component piece and a second component piece, and the open end side of the connection portion is a guide portion that gradually widens in the opening direction of the connection portion,
The supported portion and the support portion are overlapped in an axial view and set so that the power supply terminal abuts on the guide portion before the support portion is completely supported on the support portion. Has been
Between the first component piece and the second component piece in a state where both end portions in the width direction, which is a direction orthogonal to the thickness direction of the power supply terminal, are in contact with the first component piece and the second component piece. Motor actuator sandwiched between   The motor actuator according to claim 1, wherein a distance between the support portion and the connection portion is set shorter than a width of the power supply terminal.

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