JP5583416B2 - Motor actuator - Google Patents

Description

  The present invention relates to a motor actuator that drives an output shaft by a motor.

  In a refrigerator or the like, a motor actuator that drives a baffle that controls the flow of cold air includes a motor, a train wheel that transmits the rotation of the motor while shifting, and an output shaft that outputs the rotation of the motor through the train wheel. The baffle is connected to the output shaft. Here, the motor and the train wheel are disposed inside a case body that includes a bottomed first case member in which the motor and the train wheel are disposed inside, and a second case member that covers the opening of the first case member. It is stored (see Patent Document 1).

In constructing such a case body, in the motor actuator described in Patent Document 1, while providing cylindrical screw seats at the four corners of the side plate portion of the first case member, on the flat plate-like second case member, A hole is provided at a position overlapping the screw seat. For this reason, the first case member and the second case member can be coupled by covering the first case member with the second case member and then fastening the screw to the screw seat portion through the hole. Further, if the step formed on one of the first case member and the second case member is brought into contact with the other edge portion, the first case member and the second case member can be aligned. .
JP 2003-322455 A

  However, the first case member has a step portion formed in an arc shape so as to surround the screw seat portion at each of the four corners of the first case member, and the step portion contacts the edge portion of the second case member. The first case member and the second case member are aligned with each other. For this reason, one screw seat portion can be aligned in the direction in which the edge portion is in contact with the stepped portion, but cannot be aligned in the direction in which the edge portion is separated from the stepped portion. is there. In other words, in the case of Patent Document 1, there is a problem that the first case member and the second case member cannot be aligned unless all four steps are used. Therefore, for example, if the case member is elongated in the plane direction and there is no space for forming the screw seats at the four corners, the four screw seats cannot be formed and cannot be aligned. There's a problem.

  In view of the above problems, an object of the present invention is to provide a motor actuator capable of easily and effectively aligning a first case member and a second case member constituting a case body. In particular, the first case member and the second case member can be aligned even when the case member is elongated in the planar direction and there is no space for forming screw seats at the four corners. It is to provide a motor actuator.

In order to solve the above-mentioned problems, in the present invention, a motor, a gear train that transmits the rotation of the motor while shifting, an output shaft that outputs the rotation of the motor transmitted through the gear train, A motor actuator having a motor and a case body in which the train wheel is housed, wherein the case body includes a bottomed first case member in which the motor and the train wheel are disposed, and the first case member. A second case member covering the opening of the first case member, wherein the first case member and the second case member are located at a midway position in the extending direction of the side plate portion in the side plate portion of the first case member. It is coupled by a coupling portion comprising a recess that is recessed on the side opposite to the side on which the case member is located and a projection that protrudes toward the side on which the first case member is located on the second case member and fits into the recess. the first A cylindrical portion that protrudes inwardly from the inner surface of the side plate portion of the sleeve member and extends from the bottom plate portion side of the first case member toward the opening side to the position on the bottom plate portion side from the edge of the opening. The concave portion is formed, and the convex portion is configured to be bent so as to be concave toward the first case member at a position overlapping the concave portion in the second case member, and the bottom portion is the concave portion. And a hole is formed in the bottom portion at a position overlapping with the cylindrical portion. In the coupling portion, when the convex portion is overlapped with the concave portion, the side plate portion is provided on both sides of the concave portion. The first member and the second member are aligned in both directions in the extending direction of the side plate portion by interference between the edge portion and the convex portion, and in this state, the screw is inserted through the hole. Stopped on the cylinder The second member is fixed to the first member, and the coupling portion is provided at least as the side plate portion with respect to each of the two side plate portions extending in a direction intersecting with each other in the first case member. It is characterized by being.

  In the present invention, the side plate portion of the first case member is formed with a concave portion that is recessed on the side opposite to the side where the second case member is located, and the convex portion protruding from the second case member is fitted into the concave portion. The first case member and the second case member are joined by the joined portion. In the joined portion, when the convex portion is fitted into the concave portion, the first case member and the second case member are connected to the side plate portion. The concave portion and the convex portion are fixed by screws while being aligned in both the extending directions.

  Therefore, when the first case member and the second case member are joined, if the convex portion is fitted in the concave portion, the first case member and the second case member are automatically aligned in the direction in which the side plate portion extends. Therefore, the assembly work can be performed efficiently. In particular, in the case of the present invention, when the convex portion is fitted into the concave portion, the screw seat portion at the four corners is used as in Patent Document 1 by performing alignment in both directions in the direction in which the side plate portion extends. It is possible to perform alignment without any problem. In the present invention, both sides in the direction in which the side plate portion of the convex portion extends may contact the concave portion, and when the convex portion is fitted into the concave portion, the first case member and the second case member are If the two side plates can be aligned in the direction in which the side plate portion extends, both sides of the convex side plate portion in the direction in which the side plate portion extends do not necessarily have to be in contact with the concave portion, and a slight clearance is formed. Also good. Therefore, since it is not necessary to provide screw seats at the four corners for alignment, the first case member is a case member that is elongated in the plane direction and has no space for forming the screw seats at the four corners. And the second case member can be aligned.

Moreover, the coupling | bond part is comprised at two places where the two side plate parts extended in the direction which mutually cross | intersects are located among the side plate parts of a 1st case member. For this reason, since the position of the 1st case member and the 2nd case member in the plane direction is decided, it can align reliably in a plane direction. Moreover, since the screw is fastened to the cylindrical portion, the strength of the peripheral portion of the portion where the screw is fastened can be increased, and the first case member and the second case member can be firmly coupled. In addition, since the cylindrical portion forms a concave portion, it is not necessary to form a protruding portion on the side plate portion, so that the protruding portion does not interfere with the mounting on the apparatus side.

In this invention, it is preferable that the said coupling | bond part is comprised in the center vicinity of the extension direction of a side plate part in each of the said two side plate parts . According to such a configuration, even when the side plate portion is extended long, deformation of the side plate portion can be prevented.

In the present invention, it is preferable that an attachment portion for attaching the case body to a device is formed in the vicinity of the coupling portion on the outer surface of at least one of the two side plate portions of the first case member. In the portion where the coupling portion is formed, the side plate portion is reinforced with the second case member. Therefore, if an attachment portion is provided in the vicinity of the coupling portion, the motor actuator is attached to the device via the attachment portion. However, the side plate portion is not deformed.

  The actuator to which the present invention is applied can be used as a baffle driving device that drives a baffle that controls the flow of gas by the output shaft.

In this invention, it is preferable that the said cylinder part is formed to the position which reaches the said baseplate part. If comprised in this way, the hole which stops a screw | thread can be formed long using the length from the opening part of a 1st case member to a bottom plate part, ie, the depth of a 1st case member, using a side plate part. Therefore, the first case member and the second case member can be firmly coupled.

In the present invention, the screw head is located in a recess formed by the formation of the convex portion in the second case member, and does not protrude from the second case member to the opposite side to the first case member. It is preferable.

  In the present invention, the side plate portion of the first case member is formed with a concave portion that is recessed on the side opposite to the side where the second case member is located, and the convex portion protruding from the second case member is fitted into the concave portion. The first case member and the second case member are joined by the joined portion. In the joined portion, when the convex portion is fitted into the concave portion, the first case member and the second case member are connected to the side plate portion. The concave portion and the convex portion are fixed by screws while being aligned in both the extending directions. Alternatively, the second case member is formed with a concave portion that is recessed on the side opposite to the side where the first case member is located, and with respect to the concave portion, a coupling portion in which a convex portion protruding from the second case member is fitted, The first case member and the second case member are coupled. In the coupling portion, when the concave portion is fitted into the convex portion, the first case member and the second case member extend in the direction in which the side plate portion extends. The concave portion and the convex portion are fixed by screws while being aligned at both sides.

  For this reason, the first case member and the second case member can be aligned in both directions in the direction in which the side plate portion extends. Therefore, when the first case member and the second case member are joined, if the convex portion is fitted in the concave portion, the first case member and the second case member are automatically aligned in the direction in which the side plate portion extends. Therefore, the assembly work can be performed efficiently.

  In particular, in the case of the present invention, when the convex portion is fitted into the concave portion, the screw seat portion at the four corners is used as in Patent Document 1 by performing alignment in both directions in the direction in which the side plate portion extends. It is possible to perform alignment without any problem. Therefore, since it is not necessary to provide screw seats at the four corners for alignment, the first case member is a case member that is elongated in the plane direction and has no space for forming the screw seats at the four corners. And the second case member can be aligned.

It is explanatory drawing which shows the external appearance of the motor actuator to which this invention is applied. It is explanatory drawing which shows the internal structure of the motor actuator to which this invention is applied. It is explanatory drawing of the 1st case member of the motor actuator to which this invention is applied. It is explanatory drawing of the 2nd case member of the motor actuator to which this invention is applied. It is explanatory drawing of the base plate of the motor actuator to which this invention is applied. It is explanatory drawing of the coupling | bond part of the 1st case member and 2nd case member in the motor actuator to which this invention is applied. It is explanatory drawing which shows a mode that the motor actuator to which this invention was applied was integrated in the refrigerator.

  Embodiments of the present invention will be described with reference to the drawings. In the following description, the three axes that are orthogonal to each other are referred to as the X axis, the Y axis, and the Z axis, respectively. It demonstrates as a front-back direction (short direction) and an up-down direction. For convenience of explanation, the left side in the left-right direction (X-axis direction) is the -X direction, the right side is the + X direction, the front side in the front-rear direction (Y-axis direction) is the + Y direction, the rear side is the -Y direction, The upper side of the direction (Z-axis direction) will be described as + Z direction, and the lower side will be described as -Z direction.

[overall structure]
FIG. 1 is an explanatory view showing the appearance of a motor actuator to which the present invention is applied, and FIGS. 1A, 1B, and 1C are a plan view, a front view, and a bottom view of the motor actuator, respectively. . FIG. 2 is an explanatory diagram showing an internal configuration of a motor actuator to which the present invention is applied, and FIGS. 2A and 2B are a transverse sectional view and a longitudinal sectional view, respectively, of the motor actuator.

  The motor actuator 100 shown in FIG. 1 and FIG. 2 is a device used as a baffle driving device or the like which will be described later with reference to FIG. 7, and includes a case body 20 having a substantially rectangular parallelepiped shape. The tip of the output shaft 10 protrudes from the bottom of the case body 20, and a driven member such as the baffle 3 is connected to the output shaft 10.

  The case body 20 includes a bottomed first case member 21 and a second case member 22 that covers the upper opening of the first case member 21, and tapping screws 265 at coupling portions 26, 27, 28, and 29 described later. 275, 285, 295. In this embodiment, both the first case member 21 and the second case member 22 are made of a resin molded product such as ABS resin.

  A drive mechanism described below is accommodated in the case body 20, and the proximal end side of the output shaft 10 is also accommodated in the case body 20. In this embodiment, the drive mechanism includes a motor 30 including a stepping motor and a train wheel 50 that transmits the rotation of the motor 30 to the output shaft 10. In this embodiment, the motor 30 has a shape in which the motor pinion 32 protrudes from the center of the output side end surface 351 of the cylindrical motor body 35.

  In the train wheel 50, a first compound gear 51, a second compound gear 52, a third compound gear 53, and a fourth compound gear 54 are arranged in this order from the motor pinion 32 side toward the output shaft 10 side. It is configured. Here, the train wheel 50 is a reduction train wheel 50. Therefore, the motor pinion 32 is meshed with the large diameter gear of the first compound gear 51, and the small diameter gear of the first compound gear 51 is meshed with the large diameter gear of the second compound gear 52. Further, the small diameter gear of the second compound gear 52 is meshed with the large diameter gear of the third compound gear 53, and the small diameter gear of the third compound gear 53 is meshed with the large diameter gear of the fourth compound gear 54. Further, the small gear of the fourth compound gear 54 meshes with the sector gear 11 integrally formed on the base end side of the output shaft 10. Accordingly, the rotation of the motor 30 is decelerated by the train wheel 50 and transmitted to the sector gear 11, so that the output shaft 10 rotates. At that time, since the motor 30 rotates in both directions, the output shaft 10 rotates in both the clockwise and counterclockwise directions.

  The train wheel 50 and the motor 30 having such a configuration are placed at predetermined positions by the first case member 21, the second case member 22, and the ground plate 25 held between the first case member 21 and the second case member 22. It is supported.

(Configuration of first case member 21)
FIG. 3 is an explanatory view of a first case member of a motor actuator to which the present invention is applied. FIGS. 3 (a) and 3 (b) are a perspective view of the first case member as viewed obliquely from above, and from obliquely below. It is the seen perspective view.

  As shown in FIGS. 1, 2, and 3, the first case member 21 has a box shape in which four side plate portions 211, 212, 213, and 214 extend upward from a rectangular bottom plate portion 210. I have. Of the four side plate portions 211, 212, 213, and 214, the two side plate portions 211 and 212 facing each other in the Y-axis direction extend in the longitudinal direction (X-axis direction). Further, the two side plate portions 213 and 214 facing each other in the X-axis direction extend in the lateral direction (Y-axis direction). Here, the dimension in the X-axis direction of the side plate portions 211 and 212 is at least twice the dimension in the Y-axis direction of the side plate portions 213 and 214, and the dimension in the longitudinal direction of the upper opening of the first case member 21 is short. It is more than twice the dimension in the hand direction.

  On the outer surfaces of the two side plate portions 213 and 214, attachment portions 23 and 24 for attaching the motor actuator 100 to various devices are formed at a substantially central position in the Y-axis direction. In this embodiment, the attachment portions 23 and 24 have a U-shape with the open end facing downward.

  Further, on the inner side of the four side plate portions 211, 212, 213, 214, cylindrical portions 261a, 271a, 281a, 291a extending in the vertical direction are formed at substantially the center portion in the length direction, Holes 261b, 271b, 281b, 291b are opened on the upper surfaces of the cylindrical portions 261a, 271a, 281a, 291a. The holes 261b, 271b, 281b, and 291b are used to stop tapping screws 265, 275, 285, and 295 for connecting the first case member 21 and the second case member 22, as will be described later with reference to FIG. . Here, the upper surfaces of the cylindrical portions 261a, 271a, 281a, and 291a are recessed from the upper end edges of the side plate portions 211, 212, 213, and 214 to form concave portions 261, 271, 281, and 291.

  Among the recesses 261 271 281 291, in the recesses 261 271 formed in the side plate portions 213, 214 extending in the Y axis direction, the edge portions 213 a of the side plate portions 213, 214 on both sides in the Y axis direction, 213b, 214a, 214b are located, and the edge portions 213a, 213b, 214a, 214b function as an interference unit described later. Further, in the concave portions 281 and 291 formed in the side plate portions 211 and 212 extending in the X-axis direction, the edge portions 211a, 211b, 212a and 212b of the side plate portions 211 and 212 are located on both sides in the X-axis direction. The edge portions 211a, 211b, 212a, and 212b function as an interference unit that will be described later.

  In the first case member 21, an opening 210 e that projects the output shaft 10 outward is formed in the bottom plate portion 210, and a cylindrical rib 210 f is formed on the outer surface side of the bottom plate portion 210 so as to surround the opening 210 e. Is formed. Here, the opening 210 e is formed near the end of the bottom plate 210 of the first case member 21, that is, near the side plate 212. For this reason, the sector gear 11 integrally formed on the base end side of the output shaft 10 is disposed in the vicinity of the side plate portion 212 of the first case member 21. Therefore, the sector gear 11 has the circular arc portion on which the tooth portion is formed facing the side opposite to the side where the side plate portion 212 is located.

  In the bottom plate portion 210 of the first case member 21, a bottomed cylindrical portion 218 that protrudes downward is formed at a position overlapping the center of the fourth compound gear 54 of the train wheel 50. The cylindrical portion 218 is formed with a shaft holding hole that holds the lower end portion of the support shaft 540 that rotatably supports the fourth compound gear 54.

  In the bottom plate portion 210, a substantially central portion in the X-axis direction is a mounting region 360 of the motor 30, and the lower end portion of the support shaft 31 that rotatably supports the rotor is held in the motor 30 at the central position. A recess 210s is formed.

  Around the mounting area 360 of the motor 30, a first motor support portion 215 that guides the outer peripheral side surface of the motor main body 35 is formed on the inner surface of the side plate portion 211, and the first motor support portion 215 is formed on the motor main body. The curved surface corresponds to the outer peripheral shape of 35. Further, a second motor support portion 216 that guides the outer peripheral side surface of the motor main body 35 extends from the inner surface of the side plate portion 212, and the second motor support portion 216 also corresponds to the outer peripheral shape of the motor main body 35. It has a curved surface.

  In the bottom plate portion 210, a rotation-preventing protrusion 210 a is formed in the mounting area 360 of the motor 30 at a position off the center. Such a protrusion 210 a is fitted in a hole 352 b formed at a position shifted from the center on the counter-output side end surface 352 of the motor main body 35 and constitutes a rotation preventing mechanism 38.

  Further, in the bottom plate portion 210, cylindrical portions 217a, 217b, and 217c are formed on the inner surfaces of the side plate portions 211 and 212 that face each other in the Y-axis direction. For the cylindrical portions 217a, 217b, and 217c, refer to FIG. The base plate support portion into which the projections 254d, 254b, and 254c of the base plate 25 described later fit.

  Note that plate-like protrusions 219 a and 219 b for supporting the connector 320 are formed at positions adjacent to the second motor support portion 216 in the bottom plate portion 210.

(Configuration of the second case member 22)
FIG. 4 is an explanatory view of a second case member of a motor actuator to which the present invention is applied. FIGS. 4 (a) and 4 (b) are a perspective view of the second case member as viewed obliquely from above, and from obliquely below. It is the seen perspective view.

  As shown in FIGS. 1, 2, and 4, the second case member 22 is a substantially rectangular flat plate covering the upper surface opening of the first case member 21, and in the second case member 22, FIG. A plug insertion opening 220 for the connector 320 is formed at a position overlapping the connector 320 shown in FIG. Convex portions 262, 272, and 282 are located at both ends of the second case member 22 in the X-axis direction and both end portions in the Y-axis direction so as to overlap with the concave portions 261, 271, 281, and 291 formed in the first case member 21. , 292 are formed. The convex portions 262, 272, 282, 292 are formed by denting the second case member 22 downward, and the bottom portion 262 a that overlaps the upper surface of the cylindrical portions 261 a, 271 a, 281 a, 291 a of the first case member 21. 272a, 282a, and 292a. At substantially the center of the bottom portions 262a, 272a, 282a, 292a, holes 262b, 271b, 281b, 282b overlapping the holes 261b, 271b, 281b, 291b opened on the upper surface of the cylindrical portions 261a, 271a, 281a, 291a of the first case member 21 are provided. , 292b are formed. Accordingly, when the tapping screws 265, 275, 285, 295 are stopped in the holes 261b, 271b, 281b, 291b, 262b, 272b, 282b, 292b from the side of the second case member 22, the coupling portions 26, 27, 28, 29 are formed. Thus, the first case member 21 and the second case member 22 are coupled at four locations by the coupling portions 26, 27, 28, and 29.

  In addition, a cylindrical portion 228 that functions as a stopper that restricts upward displacement of the sector gear 11 is formed on the lower surface of the second case member 22. The cylindrical portion 228 and the lower surface of the second case member 22 are connected by a plate-like rib 229e. The rib 229e reinforces the cylindrical portion 228 and functions as a pressing portion for the ground plate 25 described later.

  Further, in the second case member 22, in a region overlapping the mounting region 360 of the motor 30, a projecting circular portion 226 that is concentric with respect to the center of the mounting region 360 of the motor 30 is formed so as to protrude downward. A hole 226 a that is recessed upward is formed in the center of the projecting circular portion 226. The hole 226a holds the support shaft 31 that supports the rotor in the motor 30 so as to be rotatable. Note that a leaf spring 310 is attached to the support shaft 31 between the motor pinion 32 and the second case member 22.

  Further, the second case member 22 is directed downward to a position overlapping with the centers of the first compound gear 51, the second compound gear 52, the third compound gear 53, and the fourth compound gear 54 constituting the train wheel 50. Four protruding cylindrical portions 221, 222, 223, and 224 are formed. Each of the four cylindrical portions 221, 222, 223, 224 has a first compound gear 51, a second compound gear 52, a third compound gear 53, a support shaft 510 that rotatably supports the fourth compound gear 54, Shaft holding holes for holding the upper ends of 520, 530, and 540 are formed. The four cylindrical portions 221, 222, 223, and 224 are connected by rectangular plate-shaped reinforcing ribs 229 a, 229 b, and 229 c that protrude from the lower surface of the second case member 22. The cylinder portion 221 is connected. Further, a triangular plate-shaped reinforcing rib 229 d is formed between the cylindrical portion 224 for the fourth compound gear 54 and the lower surface of the second case member 22.

(Configuration of the base plate 25)
FIG. 5 is an explanatory diagram of a base plate of a motor actuator to which the present invention is applied, and FIGS. 5A and 5B are a perspective view of the base plate as viewed obliquely from above and a perspective view as viewed from obliquely below, respectively.

  As shown in FIG. 2, in this embodiment, the ground plate 25 is held between the first case member 21 and the second case member 22, and the train wheel 50 and the motor 30 are supported at predetermined positions by the ground plate 25. Yes.

  As shown in FIGS. 2 and 5, the ground plate 25 is formed on the first flat plate portion 251 that covers the output side end surface 351 of the motor main body 35 and faces the bottom plate portion 210 of the first case member 21. A second flat plate portion 252 that is connected via a stepped portion 255 and faces the bottom plate portion 210 at a position closer to the bottom plate portion 210 of the first case member 21 than the first flat plate portion 251 is provided.

  In the base plate 25, a rod-like protrusion 254 b protrudes downward from near the periphery of the first flat plate portion 251, and the protrusion 254 b fits into a cylindrical portion 217 b formed on the bottom plate portion 210 of the first case member 21. ing. Further, in the base plate 25, rod-like protrusions 254 a and 254 c protrude downward from the diagonal position of the second flat plate part 252, and the protrusions 254 a and 254 c are formed on the bottom plate part 210 of the first case member 21. The cylinder portions 217a and 217c are fitted.

  When the second case member 22 is put on the first case member 21 with the base plate 25 positioned on the first case member 21 in this manner, the rib 229e formed on the lower surface of the second case member 22 is pressed from above. . As a result, the ground plate 25 is held between the first case member 21 and the second case member 22. In this state, there is a gap between the second flat plate portion 252 of the base plate 25 and the bottom plate portion 210 of the first case member 21, and this gap is used as a rotation region of the sector gear 11.

  In the present embodiment, in the base plate 25, three plate-like protrusions 253a, 253b, and 253c protrude downward from the periphery of the first flat plate portion 251, and the plate-like protrusions 253a, 253b, and 253c are all motors. The main body 35 is curved corresponding to the outer peripheral shape. Here, the plate-like protrusions 253a, 253b, and 253c are arranged in a circle centered on a hole 251a for projecting the motor pinion 32. Therefore, the three plate-like protrusions 253a, 253b, and 253c each serve as a motor support plate portion between the motor main body 35 and the side plate portions 211, 212, 213, and 214 of the first case member 21, or the motor main body 35. It is inserted between the second motor support portion 216 formed on the first case member 21 and has a function of holding the motor main body 35 at three locations in the circumferential direction.

  Further, the first flat plate portion 251 and the second flat plate portion 252 of the ground plate 25 are both opposed to the second case member 22, and the train wheel 50 is utilized between the ground plate 25 and the second case member 22. The first compound gear 51, the second compound gear 52, and the third compound gear 53 constituting the above are arranged. Therefore, a cylindrical portion 256 that protrudes upward is formed on the upper surface of the first flat plate portion 251 at a position overlapping the center of the first composite gear 51, and the first composite gear 51 is formed on the cylindrical portion 256. A shaft holding hole for holding the lower end portion of the support shaft 510 that rotatably supports the shaft 510 is formed. Further, on the upper surface of the second flat plate portion 252, cylindrical portions 257 and 258 projecting upward are formed at positions overlapping with the centers of the second compound gear 52 and the third compound gear 53. A shaft holding hole for holding the lower ends of the support shafts 520 and 530 that rotatably support the second compound gear 52 and the third compound gear 53 is formed in 258.

(Assembly method)
FIG. 6 is an explanatory diagram of a coupling portion between the first case member and the second case member in the motor actuator to which the present invention is applied, and FIGS. 6 (a) and 6 (b) respectively show portions constituting the coupling portion. It is the perspective view seen from diagonally upward, and sectional drawing.

  In order to assemble the motor actuator 100 of this embodiment, the motor 30, the output shaft 10, and the fan gear 11 are assembled inside the first case member 21, and then the base plate 25 is placed inside the first case member 21. It arrange | positions so that the output side end surface 351 may be covered. Next, after the fourth compound gear 54 is disposed, the third compound gear 53, the second compound gear 52, and the first compound gear 51 are sequentially disposed. After that, the second case member 22 is covered.

  As a result, as shown in FIG. 6, the convex portion 272 of the second case member 22 fits into the concave portion 271 formed in the first case member 21. Therefore, if the tapping screw 275 is fixed to the holes 271b and 272b from the second case member 22 side, the first case member 21 and the second case member 22 are connected by the coupling portion 27 constituted by the convex portion 272 and the concave portion 271. Join. In this state, the head of the tapping screw 275 is located in the recess generated by the formation of the convex portion 272 on the upper surface of the second case member 22 and does not protrude from the upper surface of the second case member 22. Further, in the coupling portion 27, the edge portions 214a and 214b of the 214 are located on both sides in the Y-axis direction with respect to the convex portion 272, and the convex portions 272 of the edge portions 214a and 214b are arranged in the Y-axis direction (side plate portion 214). It functions as an interference unit that prevents the shift in both directions. That is, the stepped portions are brought into contact with each other on both sides in the extending direction of the side plate portion 214. Therefore, the position of the second case member 22 in the Y-axis direction with respect to the first case member 21 is determined by the coupling portion 27.

  In such a configuration, in the case body 20, a similar coupling portion 26 is configured on the side where the side plate portion 213 is located, and the second case member 22 is also positioned in the Y-axis direction with respect to the first case member 21 by the coupling portion 26. It is decided.

  In the case body 20, the same coupling portions 28 and 29 are configured on the side where the side plate portions 211 and 212 are located in the case body 20, and the second case member 22 is configured so that the coupling portions 28 and 29 have X against the first case member 21. An axial position is determined.

  That is, in this embodiment, since the coupling portions 26, 27, 28, and 29 are configured on the side plate portions 211 and 212 and the side plate portions 213 and 213 that extend in directions intersecting with each other, the second case member 22 is The positions of the X-axis direction and the Y-axis direction with respect to the first case member 21 are also determined by the coupling portions 26, 27, 28, and 29.

(Main effects of this form)
As described above, in the motor actuator 100 of this embodiment, the ground plate 25 is disposed inside the case body 20, and the motor is interposed between the first flat plate portion 251 of the ground plate 25 and the bottom plate portion 210 of the first case member 21. 30, and the outer peripheral side surface of the motor main body 35 is held by plate-like protrusions 253 a, 253 b, and 253 c as motor support plate portions protruding from the first flat plate portion 251 of the ground plate 25. For this reason, when fixing the motor 30 in the case body 20, there is no need to attach a motor mounting plate to the counter-output side end surface 352 of the motor 30, so that a gear around the motor 30 is close to the motor body 35. Can be arranged. Therefore, there is no useless empty space inside the case body 20, and the motor actuator 100 can be downsized.

  In addition, since a rotation prevention mechanism 38 using the protrusion 210a and the hole 352b is configured between the non-output side end surface 352 of the motor 30 and the bottom plate portion 210 of the first case member 21, a motor mounting plate is used. Even without this, the motor 30 can be held by the first case member 21.

  Moreover, according to this form, since the motor 30 can be reliably fixed only by incorporating the motor 30 and the ground plane 25 in order inside the 1st case member 21, assembly work can be performed efficiently. In configuring the anti-rotation mechanism 38, a hole may be formed in the first case body 21 and a protrusion may be formed on the motor 30 side.

  In the present embodiment, the first flat plate portion 251 and the second flat plate portion 252 of the base plate 25 are provided with a first composite gear 51, a second composite gear 52, which are disposed between the base plate 25 and the second case member 22, A shaft holding hole for holding the support shafts 510, 520, and 530 of the third compound gear 53 is formed. For this reason, the space between the base plate 25 and the second case member 22 can be effectively used as a gear arrangement region, which is suitable for setting a large reduction ratio using a large number of gears. Further, since the positional accuracy of each gear (the first compound gear 51, the second compound gear 52, the third compound gear 53, and the fourth compound gear 54) constituting the train wheel 50 is high and the backlash is small, the output shaft 10 Even if the motor actuator 100 is mounted on a device in which the driven member connected to the motor receives wind pressure, rattling between the gears does not occur.

  Further, the ground plate 25 includes a first flat plate portion 251 that covers the output side end surface 351 of the motor 30 and a second flat plate that faces the bottom plate portion 210 at a position closer to the bottom plate portion 210 of the first case member 21 than the first flat plate portion 251. A gear on the lower side of the train wheel 50 than between the first flat plate portion 251 and the second case member 22 is disposed between the second flat plate portion 252 and the second case member 22. ing. For this reason, the 1st compound gear 51, the 2nd compound gear 52, and the 3rd compound gear 53 which constitute wheel train 50 can be arranged so that it may approach the bottom plate part 210 of the 1st case member 21. Therefore, it is suitable for arranging a plurality of compound gears (a first compound gear 51, a second compound gear 52, and a third compound gear 53) having a large diameter gear portion and a small diameter gear portion.

  Further, the output shaft 10 is integrated with a sector gear 11 that meshes with the final gear of the train wheel 50, and the sector gear 11 has the side plate portion 212 positioned in the vicinity of the side plate portion 212 of the first case member 21. The circular arc part in which the tooth part was formed is turned to the opposite side to the side. For this reason, since the output shaft 10 and the sector gear 11 can be disposed in the vicinity of the side plate portion 212, the inside of the case body 20 can be used effectively, and no empty space is generated. In addition, since the sector gear 11 has a rotation region in the gap between the second flat plate portion 252 of the base plate 25 and the bottom plate portion 210 of the first case member 21, the inside of the case body 20 can be used more effectively. , No free space occurs. Further, the sector gear 11 can be arranged in a narrow space even when the sector gear 11 needs to be enlarged because the largest torque is applied. Therefore, the motor actuator 100 can be reduced in size.

  The side plate portions 211, 212, 213, and 214 of the first case member 21 are formed with recesses 261, 271, 281, and 291 that are recessed on the side opposite to the side where the second case member 22 is located, and the recesses 261 are formed. , 271, 281, 291, the first case member 21 and the second case are coupled by the coupling portions 26, 27, 28, 29 in which the convex portions 262, 272, 282, 292 protruding from the second case member 22 are fitted. The member 22 is coupled. Moreover, the coupling portions 26, 27, 28, and 29 are formed on both the side plate portions 211 and 212 that extend in the X-axis direction and the side plate portions 213 and 214 that extend in the Y-axis direction. Therefore, when the first case member 21 and the second case member 22 are joined together, the convex portions 262, 272, 282, 292 are fitted into the concave portions 261, 271, 281, 291. Since the position in the plane direction with respect to the member 22 is determined and automatically aligned in the plane direction, the assembling work can be performed efficiently.

  Further, the coupling portions 26, 27, 28, and 29 are configured near the center in the extending direction of the side plate portions 211, 212, 213, and 214. Therefore, even if the side plate portions 211, 212, 213, 214 are extended long, the deformation of the side plate portions 211, 212, 213, 214 can be prevented.

  The upper opening of the first case member 21 has a length in the longitudinal direction that is at least twice that in the short direction, but the coupling portions 28 and 29 are configured at positions corresponding to the longitudinal direction. For this reason, the side plate portions 211 and 212 extending in the longitudinal direction are more easily deformed than the side plate portions 213 and 214 extending in the short direction, but the side plate portions 211 extending in the longitudinal direction, The deformation of 212 can be reliably prevented.

  Further, on the outer surface of the side plate portions 213 and 214 of the first case member 21, attachment portions 23 and 24 for attaching the case body 20 to the device are formed in the vicinity of the coupling portions 26 and 27. In the portion where 27 is formed, the side plate portions 213 and 214 are reinforced by the second case member 22. Therefore, even if the motor actuator 100 is attached to the device via the attachment portions 23 and 24 provided on the thin side plate portions 213 and 214, the side plate portions 213 and 214 are not deformed.

  Further, holes 261b, 271b, 281b, 291b for stopping the tapping screws 265, 275, 285, 295 are formed in the side plate portions 211, 212, 213, 214 of the first case member 21, and the holes 261b, 271b, 281b and 291b are extended from the opening of the first case 21 toward the bottom plate 210. Therefore, the holes 261b, 271b, 281b, and 291b for stopping the tapping screws 265, 275, 285, and 295 are used for the depth of the first case member 21 using the side plate portions 211, 212, 213, and 214, that is, the first case member. The first case member 21 and the second case member 22 can be firmly coupled to each other because the length from the opening portion 21 to the bottom plate portion 210 can be formed long.

  Further, the holes 261b, 271b, 281b, 291b are thick in the side plate portions 211, 212, 213, 214 that protrude inward from the inner surfaces of the side plate portions 211, 212, 213, 214 of the first case member 21, respectively. It is formed in the part. Therefore, since the holes 261b, 271b, 281b, and 291b for fastening the screws can be formed by using the side plate portions 211, 212, 213, and 214, the strength of the peripheral portion that forms the holes 261b, 271b, 281b, and 291b The first case member 21 and the second case member 22 can be firmly coupled. In addition, since it is not necessary to form the protrusions associated with the formation of the holes 261b, 271b, 281b, and 291b on the outer surfaces of the side plate portions 211, 212, 213, and 214, the protrusions are obstructive when placed on the apparatus side. There is nothing to do.

  Further, attachment portions 23 and 24 for attaching the case body 20 to the device are formed on the outer surfaces of the thick portions of the side plate portions 213 and 214 in which the holes 261b and 271b are formed. With this configuration, the portion where the holes 261b and 271b are formed is in the thick portion of the side plate portions 213 and 214, so if the attachment portions 23 and 24 are provided in the vicinity of the holes 261b and 271b, Coupled with the strength improvement by the metal tapping screws 265 and 275, even if the motor actuator is attached to the device via the attachment portions 23 and 24, the side plate portions 213 and 214 are not deformed.

(Example of mounting the motor actuator 100 on a refrigerator)
FIG. 7 is an explanatory view showing a state in which the motor actuator 100 to which the present invention is applied is incorporated in a refrigerator. FIGS. 7A and 7B are an explanatory view of the inside of the refrigerator and a baffle by the motor actuator 100, respectively. It is explanatory drawing which shows a mode that it drives.

  In FIG. 7A, a refrigerator 900 is a mid-freezer refrigerator, in which a freezer room 961 is provided in the center, a refrigerator room 962 is provided in the upper part, and a vegetable room 963 is provided in the lower part. A duct 921 for blowing cool air to the refrigerating chamber 962 is formed, and the motor type damper device 1 using the motor actuator 100 to which the present invention is applied is fitted into a portion communicating with the refrigerating chamber 62 of the duct 921. Yes. In addition, the motor type damper apparatus 1 may be attached to both the refrigerator compartment 962 and the vegetable compartment 963.

  In any case, the motor type damper device 1 controls the flow of cold air supplied through the duct 921. As shown in FIG. 7B, the motor type damper device 1 is configured by connecting a baffle 3 to an output shaft 10 of a motor actuator 100 to which the invention is applied.

(Other embodiments)
Moreover, in the said embodiment, although the motor actuator 100 to which this invention was applied was used for a baffle drive, you may apply this invention to the motor actuator 100 for driving another driven member.

  In the above embodiment, the side plate portions 211, 212, 213, and 214 of the first case member 21 are formed with the concave portions 261, 271, 281, and 291, and the convex portions 262, 272, and 282 are formed on the second case member 22. , 292 is formed, but is not necessarily limited to this configuration. Contrary to the above-described embodiment, a concave portion recessed in the second case member 22 opposite to the side where the first case member 21 is located, That is, a notch portion that is notched inward from the outer peripheral side of the flat plate-like second case member 22 is formed, and the side plate portions 211, 212, and 213 of the first case member 21 with respect to the notch as the recess portion. , 214 may be formed so as to protrude from the side where the second case member is located, and the concave portion and the convex portion may be fitted. Further, a convex portion may be formed on any two of the side plate portions 211, 212, 213, and 214 of the first case member 21, and a concave portion may be formed on the remaining two side plate portions. In this case, the second case is provided with an uneven portion that fits the uneven portion of the first case at a location corresponding to the uneven portion of the first case.

DESCRIPTION OF SYMBOLS 10 Output shaft 11 Fan-shaped gear 20 Case body 21 1st case member 22 2nd case members 23 and 24 Attachment part 25 Ground plate 26, 27, 28, 29 Connection part 30 Motor 38 Anti-rotation mechanism 50 Wheel train 100 Motor actuators 211 and 212 213, 214 Side plate portion 251 First flat plate portion 252 of the main plate Second flat plate portions 261, 271, 281, 291 of the main plate Recessed portions 262, 272, 282, 292 Convex portions

Claims (6)

A motor,
A train wheel that shifts and transmits the rotation of the motor;
An output shaft for outputting the rotation of the motor transmitted through the train wheel;
A case body housing the motor and the train wheel;
In a motor actuator having
The case body includes a bottomed first case member in which the motor and the train wheel are disposed inside, and a second case member that covers an opening of the first case member,
The first case member and the second case member are concave portions that are recessed on the opposite side of the side plate portion of the first case member in the middle of the extending direction of the side plate portion from the side on which the second case member is located. And the second case member is coupled by a coupling portion including a convex portion that protrudes toward the side where the first case member is located and fits into the concave portion,
The cylindrical portion that protrudes inward from the inner surface of the side plate portion of the first case member and extends from the bottom plate portion side of the first case member toward the opening side is closer to the bottom plate portion side than the edge of the opening. Formed to a position to form the recess,
The convex portion is formed by being bent so as to be recessed toward the first case member at a position overlapping the concave portion in the second case member, and the bottom portion overlaps the concave portion, and the bottom portion Is formed with a hole at a position overlapping the cylindrical portion,
In the coupling portion, when the convex portion is overlapped with the concave portion, the first plate and the second member are brought into contact with the side plate due to interference between edge portions located on both sides of the concave portion and the convex portion in the side plate portion. In this state, the screw is fixed to the cylindrical portion through the hole, and the second member is fixed to the first member.
The coupling portion is provided at least as the side plate portion with respect to each of two side plate portions extending in a direction crossing each other in the first case member . 2. The motor actuator according to claim 1, wherein the coupling portion is configured in the vicinity of the center in the extending direction of the side plate portion in each of the two side plate portions . The attachment part for attaching the said case body to an apparatus in the vicinity of the said connection part is formed in the outer surface of at least one of the said 2 side-plate part of a said 1st case member, The Claim 1 or 2 characterized by the above-mentioned. The motor actuator described in 1. The motor actuator according to any one of claims 1 to 3, wherein a baffle for controlling a gas flow is driven by the output shaft . The motor actuator according to any one of claims 1 to 4, wherein the cylindrical portion is formed up to a position reaching the bottom plate portion . The screw head is located in a recess formed by forming the convex portion in the second case member, and does not protrude from the second case member to the opposite side to the first case member. The motor actuator according to any one of claims 1 to 5 .

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