JP2022154149A - geared motor - Google Patents

Abstract

To provide a geared motor which can reduce the number of components and manufacturing man-hours.SOLUTION: A geared motor 1 includes a motor 10, a gear box 2 having a gear housing 20 storing a plurality of gears therein, and a resin holder 7. In the holder 7, a gear box support part 71 overlaps an end on an output side L1 of the motor 10, and supports the gear box 2. The gear box support part 71 and a first end 12 of the motor 10 are fixed to each other by engagement of a first engagement projection part 72 of the gear box support part 71 with a first engagement hole 160 provided on a first end plate 12 of the motor 10 as a first engagement part 16. The gear housing 20 and the gear box support part 71 are fixed to each other by engagement. The geared motor 1 has a wiring board 3 on an outer peripheral side of the motor 10, and the holder 7 has a substrate support part 76 for supporting the wiring board 3 from the inside in a radial direction.SELECTED DRAWING: Figure 3

Description

The present invention relates to a geared motor in which a gearbox is integrally provided with the motor.

In a geared motor in which a gearbox is provided integrally with a motor, a holder that supports the gearbox is fixed to the motor with screws between the motor and the gearbox (see Patent Document 1).

JP 2014-149013 A

A structure in which a holder is fixed to a motor with screws, such as the geared motor described in Patent Document 1, has a problem that the number of parts and manufacturing man-hours are large because it is necessary to provide tapped holes and screws.

In view of the above problems, an object of the present invention is to provide a geared motor capable of reducing the number of parts and manufacturing man-hours.

In order to solve the above-described problems, in the present invention, a geared motor includes a motor, a holder having a gearbox supporting portion overlapping an output-side end of the motor in the rotation center axis direction, and a gearbox supporting portion. a gearbox supported by the gearbox support on the output side, wherein the holder is made of resin, and the motor engages with the gearbox support to hold the gearbox support. It is characterized by comprising a first engaging portion that engages.

In the geared motor according to the present invention, since the motor includes the first engagement portion that engages with the gearbox support portion to hold the gearbox support portion, the gearbox support portion can be fixed to the motor by the engagement. can. Therefore, it is possible to reduce the number of parts and manufacturing man-hours because there is no need to provide tapped holes or screws. Moreover, since the holder is made of resin, a structure suitable for engagement with the motor can be easily realized.

In the present invention, the gearbox supporting portion includes a first engaging convex portion protruding toward the motor, and the first engaging portion enters from the output side. A mode including a first engagement hole for engagement can be adopted. According to this aspect, the holder can be fixed to the motor by pressing the gearbox support portion against the motor side.

In the present invention, it is possible to employ an aspect in which the motor includes an end plate for holding a bearing at the end on the output side, and the end plate is provided with the first engagement hole.

In the present invention, the gearbox includes a plurality of gears and a gear housing accommodating the plurality of gears inside, and the gearbox support engages with the gear housing to hold the gear housing. It is possible to employ a mode provided with a second engaging portion. According to this aspect, the engagement can secure the gear housing to the gearbox support. Therefore, when fixing the gear housing to the gear box support portion, it is not necessary to provide a screw or the like, so it is possible to reduce the number of parts and manufacturing man-hours. Moreover, since the holder is made of resin, a structure suitable for engagement with the gear housing can be easily realized.

In the present invention, the gear housing is provided with a second engaging hole penetrating in the radial direction, and the second engaging portion is a second engaging portion that enters and engages the second engaging hole from the inside in the radial direction. A mode including an engaging projection can be adopted. According to this aspect, when the gear housing is pressed against the gearbox supporting portion, the second engaging convex portion engages with the second engaging hole, so that the gear housing can be fixed to the gearbox supporting portion.

In the present invention, a washer is arranged between the gearbox and the gearbox support, and a radially outer end of the washer is sandwiched between the gear housing and the gearbox support. Any aspect can be adopted. According to this aspect, the slidability of the gears used in the gearbox can be enhanced. Also, the washer can be fixed by connecting the gearbox and a holder fixed to the motor.

In the present invention, it is possible to employ a mode in which the plurality of gears includes a planetary gear that meshes with an internal gear formed on the inner peripheral surface of the gear housing.

In the present invention, the wiring board is arranged on the outer peripheral side of the motor, and the holder extends from the gearbox support portion to the outer peripheral side of the motor to support the wiring board from the inside in the radial direction. An aspect having a substrate supporting portion can be adopted. According to this aspect, the gearbox can be held on the output side of the motor by using the holder for fixing the wiring board on the outer peripheral side of the motor. It is possible to provide a geared motor in which a wiring board is fixed to the outer peripheral side of the motor via a holder without adding any additional components. Therefore, it is possible to provide a low-cost geared motor in which the wiring board is fixed to the outer peripheral side of the motor via the holder.

In the geared motor according to the present invention, since the motor includes the first engagement portion that engages with the gearbox support portion to hold the gearbox support portion, the gearbox support portion can be fixed to the motor by the engagement. can. Therefore, it is possible to reduce the number of parts and manufacturing man-hours because there is no need to provide tapped holes or screws. Moreover, since the holder is made of resin, a structure suitable for engagement with the motor can be easily realized.

1 is a perspective view of a geared motor to which the present invention is applied; FIG. FIG. 2 is a side view of the geared motor shown in FIG. 1; FIG. 2 is a cross-sectional view of the geared motor shown in FIG. 1; FIG. 2 is an exploded perspective view showing a state in which a gear housing is removed from the geared motor shown in FIG. 1; FIG. 5 is an exploded perspective view showing gears and the like shown in FIG. 4 ; FIG. 5 is an exploded perspective view showing a state in which a wiring board and the like are removed from the motor shown in FIG. 4; The perspective view which looked at the holder etc. which are shown in FIG. 6 from the anti-output side. FIG. 2 is an explanatory view showing an assembly process of the geared motor shown in FIG. 1;

An example of a geared motor 1 to which the present invention is applied will be described with reference to the drawings. In the following description, of the two sides in the direction of the rotation axis L along which the rotation center axis L of the motor 10 extends, the side on which the gearbox 2 is provided is the output side L1. The side opposite to the output side is the anti-output side L2. Further, in describing the wiring board 3 and the like, one side of the rotation center axis L will be denoted by CW, and the other side will be denoted by CCW.

(Overall Configuration of Geared Motor 1)
FIG. 1 is a perspective view of a geared motor 1 to which the present invention is applied. FIG. 2 is a side view of the geared motor 1 shown in FIG. 1. FIG. FIG. 3 is a cross-sectional view of the geared motor 1 shown in FIG. FIG. 3 shows a cross section of the geared motor 1 taken along the rotation center axis L. As shown in FIG. FIG. 4 is an exploded perspective view showing how the gear housing 20 is removed from the geared motor 1 shown in FIG.

As shown in FIGS. 1, 2, 3 and 4, the geared motor 1 of this embodiment includes a motor 10, a gear box 2 arranged on the output side L1 in the direction of the rotation axis L with respect to the motor 10, It has a wiring board 3 arranged on the outer peripheral side of the motor 10 and a holder 7 fixed to the motor 10 , and the holder 7 holds the gearbox 2 and the wiring board 3 . That is, the gearbox 2 is held on the output side L1 of the motor 10 using the holder 7 for fixing the wiring board 3 on the outer peripheral side of the motor 10 . Therefore, the geared motor 1 in which the wiring board 3 is fixed to the outer peripheral side of the motor 10 via the holder 7 can be provided without greatly increasing the number of assembly man-hours or adding new parts. Therefore, the geared motor 1 in which the wiring board 3 is fixed to the outer peripheral side of the motor 10 via the holder 7 can be provided at a low cost.

The motor 10 includes a cylindrical stator 4, a metal first end plate 12 fixed by welding or the like to a first end portion 11 on the output side L1 of the stator 4, and a counter-output side L2 of the stator 4. It has a metal second end plate 14 fixed to the second end 13 by a method such as welding. Therefore, the motor 10 has a first end plate 12 and a second end plate 14 on both sides in the rotation center axis L direction. In the motor 10, a power feeding section 15 including the wiring board 3 and the like is provided radially outside the stator 4 that constitutes the motor body. In the power supply portion 15 , a power supply member 19 from the outside is connected to the end portion of the CCW on the other side in the circumferential direction of the wiring board 3 . In this embodiment, the power supply member 19 is the connector 190 .

(Configuration of motor 10)
As shown in FIG. 3, the motor 10 is a stepping motor. In the stator 4, the A-phase stator 4A on the output side Ll and the B-phase stator 4B on the opposite output side L2 are arranged in the rotation center axis L direction. are placed on top of each other. For this reason, in the stator 4, the first coil bobbin 42A around which the first coil 46A is wound and the second coil bobbin 42B around which the second coil 46B is wound are arranged to overlap in the rotation center axis L direction. An annular inner stator core 43A and an annular outer stator core 44A are superimposed on both sides in the rotation center axis L direction of the first coil bobbin 42A. An annular inner stator core 43B and an annular outer stator core 44B are superimposed on both sides in the rotation center axis L direction of the second coil bobbin 42B. A plurality of pole teeth 45 of the inner stator cores 43A, 43B and the outer stator cores 44A, 44B are arranged in the circumferential direction on the inner peripheral surfaces of the first coil bobbin 42A and the second coil bobbin 42B. In this embodiment, the outer circumference side portion of the outer stator core 44A constitutes the motor case 41 by extending to the radially outer side of the first coil bobbin 42A and the second coil bobbin 42B. Accordingly, the first end 11 on the output side L1 of the stator 4 consists of the annular portion 47 of the outer stator core 44A. A second end 13 on the counter-output side L2 of the stator 4 consists of an annular portion 48 of the outer stator core 44B.

A rotor 5 is coaxially arranged radially inside the stator 4 . In the rotor 5, the rotating shaft 50 extends along the rotation center axis L, and the rotating shaft 50 protrudes from the first end plate 12 to the output side L1. A cylindrical permanent magnet 59 is fixed with an adhesive or the like to a position near the output side L2 of the rotating shaft 50 . Inside the stator 4 , the permanent magnet 59 faces the pole teeth 45 of the stator 4 on the radially inner side with a predetermined gap therebetween.

The rotating shaft 50 is rotatably supported by a first bearing 61 held on the first end plate 12 . A washer 66 through which the rotating shaft 50 passes is arranged between the first bearing 61 and the permanent magnet 59 . On the non-output side L2 of the motor 10, the rotary shaft 50 is rotatably supported by a second bearing 62 held by the second end plate 14. As shown in FIG. An annular washer 67 through which the rotating shaft 50 passes is arranged between the second bearing 62 and the permanent magnet 59 .

(Configuration of gearbox 2)
5 is an exploded perspective view showing gears and the like shown in FIG. 4. FIG. As shown in FIGS. 3, 4, and 5, the gearbox 2 includes a plurality of gears described below, and a cylindrical gear housing 20 that accommodates the plurality of gears. A serrated portion 250 of the output member 25 protrudes from 20 to the output side L1. In this embodiment, the plurality of gears include planetary gears that mesh with an internal gear 201 formed on the inner peripheral surface of the gear housing 20. A three-stage planetary gear mechanism 21, 22, 23 is arranged. Therefore, the rotation of the motor 10 is decelerated and transmitted to the output member 25 .

The first-stage planetary gear mechanism 21 includes a sun gear 210 fixed to the rotating shaft 50 of the motor 10, a planetary carrier 211, a total of three planetary gears 212 rotatably held by the planetary carrier 211, and gears. It is configured by an internal gear 201 provided on the inner peripheral surface of the housing 20 . The second-stage planetary gear mechanism 22 includes a sun gear 220 provided on the planetary carrier 211 of the preceding-stage planetary gear mechanism 21, a planetary carrier 221, and a total of three planetary gears rotatably held by the planetary carrier 221. 222 and an internal gear 201 provided on the inner peripheral surface of the gear housing 20 . The third-stage planetary gear mechanism 23 includes a sun gear 230 provided on the planetary carrier 221 of the preceding-stage planetary gear mechanism 22, a planetary carrier 231, and a total of three planetary gears rotatably held by the planetary carrier 231. 232 and an internal gear 201 provided on the inner peripheral surface of the gear housing 20 . Here, the planetary carrier 231 is configured as part of the output member 25 .

(Configuration of first terminal block 151 and second terminal block 152)
FIG. 6 is an exploded perspective view showing a state in which the wiring board 3 and the like are removed from the motor 10 shown in FIG. As shown in FIGS. 3 and 6, the motor case 41 is provided with a notch 410 that is partly cut in the circumferential direction. In the first coil bobbin 42A, at an angular position corresponding to the notch 410, a first terminal block 151 is provided at the radially outer end of the flange portion 420A on the counter-output side L2. Two pin-shaped first terminals 152 are held on the first terminal block 151 at positions spaced apart in the circumferential direction. The radially outer end of the first terminal block 151 and the two first terminals 152 protrude radially outward from the notch 410 . In the second coil bobbin 42B, at an angular position corresponding to the notch 410, a second terminal block 153 is provided at the radially outer end of the flange portion 420B on the counter-output side L2. Two pin-shaped second terminals 154 are held on the second terminal block 153 at positions spaced apart in the circumferential direction. At the first terminal 152 and the second terminal 154, the ends of the first coil 46A and the second coil 46B are bound and fixed with solder.

The radially outer end of the first terminal block 151 , the two first terminals 152 , the radially outer end of the second terminal block 153 , and the two second terminals 154 extend radially from the notch 410 . The first terminal 152 and the second terminal 154 projecting outward are connected to the wiring board 3 arranged to face the radially outer end surfaces of the first terminal block 151 and the second terminal block 153 . More specifically, a total of four through holes 36 through which the first terminals 152 and the second terminals 154 pass are formed in the wiring board 3 , and the lands 37 formed around the four through holes 36 are first terminal 1
52 and second terminal 154 are connected by solder (not shown).

On the radially outer surface of the first terminal block 151 and the radially outer surface of the second terminal block 153, portions 151a and 153a corresponding to the roots of the first terminal 152 and the second terminal 154 are formed on both sides in the circumferential direction. 151b, 151c, 153b, and 153c. Therefore, the wiring board 3 is positioned in the radial direction by coming into contact with the ends 151b, 151c, 153b, and 153c. It faces 151a and 153a with a gap G shown in FIG. Therefore, since the wiring board 3 does not come into contact with the coil wires wound around the root portions of the first terminals 152 and the second terminals 154, disconnection of the coil wires is less likely to occur.

(Configuration of holder 7)
FIG. 7 is a perspective view of the holder 7 and the like shown in FIG. 6 as viewed from the non-output side L2. As shown in FIGS. 3, 6 and 7, the holder 7 includes a gearbox support portion 71 overlapping the first end plate 12 constituting the end portion of the output side L1 of the motor 10 from the output side L1, and a gearbox support portion 71. and a board support portion 76 extending from the portion 71 to the outer peripheral side of the motor 10 . Accordingly, the gear housing 20 is provided with a notch 29 for passing through the portion where the substrate support portion 76 extends from the gearbox support portion 71 . Here, the gearbox support portion 71 holds the gearbox 2 from the counter-output side L2, and the board support portion 76 holds the wiring board 3 from the inside in the radial direction. Therefore, the gearbox 2 and the wiring board 3 can be held by the simply configured holder 7 . The gearbox support portion 71 is in the shape of a disk having substantially the same size as the first end plate 12, and extends from the radially outer end portion of the gearbox support portion 71 to the anti-output side L2. It is a plate-shaped part that In this embodiment, the holder 7 is made of resin. More specifically, the holder 7 is made of reinforced resin containing glass fibers.

In this embodiment, holder 7 is fixed to motor 10 . More specifically, as shown in FIG. 7 , the motor 10 includes a first engagement portion 16 that engages with the gearbox support portion 71 to hold the gearbox support portion 71 . In this embodiment, the gearbox support portion 71 includes a plurality of first engagement projections 72 protruding toward the motor 10 side, and the first engagement portion 16 has the plurality of first engagement projections 72 It includes a plurality of first engagement holes 160 that enter and engage from the output side L1. In this embodiment, the holder 7 overlaps the first end plate 12 forming the end portion of the output side L1 of the motor 10 from the output side L1. The portion 16 is provided on the first end plate 12 .

Therefore, when the first engaging projection 72 is caused to enter the first engaging hole 160 from the output side L1, the claw portion 721 bent radially outward at the tip of the first engaging projection 72 is The holder 7 is fixed to the first end plate 12 by contacting the surface of the first end plate 12 on the counter-output side L2. As described above, in this embodiment, when the gearbox support portion 71 of the holder 7 is pressed against the motor 10 side, the gearbox support portion 71 is engaged with the first engagement protrusion 72 and the first engagement hole 160 . can be fixed to the motor 10 . Therefore, it is possible to reduce the number of parts and manufacturing man-hours because there is no need to provide tapped holes or screws. Further, since the holder 7 is made of resin, the structure of the first engaging protrusion 72 that is suitable for engagement with the first engaging hole 160 formed in the first end plate 12 of the motor 10 can be easily realized. can do. Furthermore, in the present embodiment, as shown in FIG. 6, both the radially inner portion 160a and the radially outer portion 160b of the opening edge of the output side L1 of the first engaging hole 160 are oblique. It has a chamfered shape. Therefore, it is possible to easily insert the first engaging protrusion 72 into the first engaging hole 160 and prevent damage or scraping of the first engaging protrusion 72 .

Further, as shown in FIG. 4 , the gearbox support portion 71 includes a second engaging portion 73 that engages with the gear housing 20 to hold the gear housing 20 . In this embodiment, the gear housing 20 is provided with a plurality of second engagement holes 26 spaced apart in the circumferential direction of the gear housing 20 , and the second engagement portions 73 are provided in the plurality of second engagement holes 26 . It is composed of a plurality of second engaging projections 731 that enter from the radially inner side and engage. As described above, in this embodiment, when the gear housing 20 is pressed against the gearbox support portion 71 , the second engagement convex portion 731 engages with the second engagement hole 26 , so that the gear housing 20 is pushed against the gearbox support portion 71 . can be fixed. Therefore, since it is not necessary to provide a screw or the like, it is possible to reduce the number of parts and manufacturing man-hours. In addition, since the holder 7 is made of resin, the second engagement protrusion 731 can easily have a structure suitable for engagement with the second engagement hole 26 formed in the gear housing 20 .

As shown in FIG. 6 , the substrate support portion 76 has a plate-like shape overlapping the outer peripheral surface of the motor case 41 from the outside in the radial direction. , the radially outer end of the second terminal block 153 and the two second terminals 154 are formed with openings 760 that protrude radially outward from the notch 410 . Therefore, the wiring board 3 is connected to the first terminal 152 and the second terminal 154 while overlapping the board supporting portion 76 from the radially outer side. Here, the wiring board 3 may be either a rigid board or a flexible wiring board, but in this embodiment, the wiring board 3 is a rigid board.

In the substrate supporting portion 76 , a region overlapping the wiring substrate 3 is a concave portion 77 that is recessed radially inward. 3 is placed in the recess 77 from the radially outer side, the wiring board 3 overlaps the recess 77 . In this state, a portion of the wiring board 3 protrudes radially outward from the recess 77 , but the recess 77 can reduce the radially outward protrusion of the wiring board 3 from the recess 77 .

Here, the concave portion 77 has a first side wall 771 on one side CW in the circumferential direction and a second side wall 772 on the output side L1. Therefore, when the wiring board 3 is placed in the recess 77 , the first end 31 of the one side CW of the wiring board 3 in the circumferential direction abuts the first side wall 771 of the recess 77 , and the first end 31 of the output side L 1 of the wiring board 3 contacts the first side wall 771 of the recess 77 . The two ends 32 abut on the second sidewall 772 of the recess 77 . Therefore, the wiring board 3 can be reliably fixed to the holder 7 .

On the other hand, since the concave portion 77 has no side wall on the other side CCW in the circumferential direction and on the anti-output side L2, when the wiring board 3 is superimposed on the concave portion 77, the CCW on the other side in the circumferential direction of the wiring board 3 does not exist. The third end portion 33 and the fourth end portion 34 on the anti-output side L<b>2 protrude from the board support portion 76 . Here, the electrode 30 shown in FIG. 8 is formed on the third end portion 33 . Therefore, the power supply member 19 consisting of the connector 190 (see FIG. 1) is connected to the third end portion 33 of the wiring board 3 .

The wiring board 3 is provided with a plurality of third engaging holes 38 penetrating the wiring board 3 , and the board supporting portion 76 has a plurality of third engaging projections that respectively fit into the plurality of third engaging holes 38 . A portion 78 is provided. Therefore, when the wiring board 3 is arranged so that the third engaging protrusions 78 are fitted in the third engaging holes 38, the third engaging protrusions 78 are engaged with the third engaging protrusions 78 as indicated by the solid line La in FIG. The wiring board 3 is held by the holder 7 by deforming the portion protruding from the hole 38 so as to overlap the wiring board 3 from the outside in the radial direction by thermal welding, as indicated by the dashed line Lb in FIG. In this embodiment, the plurality of third engaging protrusions 78 are composed of a first protrusion 781 on one side CW in the circumferential direction and a second protrusion 782 on the other side CCW in the circumferential direction. The matching hole 38 consists of a first hole 381 into which the first protrusion 781 is fitted and a second hole 382 into which the second protrusion 782 is fitted. The first hole 381 is a slit extending in a groove shape to the first end portion 31 of the wiring board 3 . is formed.

(Configuration of washer 8)
As shown in FIGS. 3 and 4, an annular washer 8 is arranged between the gearbox 2 and the gearbox support portion 71 . More specifically, an annular washer 8 is arranged between the planetary gear 212 used in the first-stage planetary gear mechanism 21 of the gearbox 2 and the gearbox support portion 71 . Therefore, since the planetary gears 212 do not come into direct contact with the gearbox support portion 71, sliding loss can be reduced. Especially in this embodiment, when the holder 6 is resin-molded, the gearbox support portion 71 is provided with a hole 710 (see FIG. 6) for arranging a mold for providing the first engaging convex portion 72. Therefore, the planetary gear 212 is Although there is a risk of getting caught on the edge of the hole 710 , the washer 8 makes it difficult for the planetary gear 212 to get caught on the edge of the hole 710 . Also, the washer 8 has substantially the same external dimensions as the gearbox support portion 71 . Therefore, the end of the washer 8 does not get caught on the planetary gear 212 . The washer 8 is made of metal. For example, the washer 8 is a sliding washer made of steel such as stainless steel.

Here, the end portion 27 on the side opposite to the output side L2 of the gear housing 20 has a larger inner diameter than the portion where the internal gear 201 is formed. For this reason, the end portion 27 of the gearbox 2 includes an annular wall portion 271 that surrounds the gearbox support portion 71 from the radially outer side, and an annular stepped portion 272 that faces the anti-output side L2. . Also, the outer diameter of the washer 8 is larger than the inner diameter of the portion where the internal gear 201 is formed. Therefore, the end 81 of the washer 8 on the outer peripheral side is held between the gear box supporting portion 71 and the step portion 272 of the gear housing 20 . Therefore, when the planetary gear 212 of the gearbox 2 rotates in contact with the washer 8, the washer 8 is less likely to be displaced. Further, since the washer 8 is not displaced, deformation of the washer 8 is less likely to occur. Furthermore, the transmission of heat generated by the motor 10 to the gearbox 2 can be suppressed.

(Assembly process)
FIG. 8 is an explanatory diagram showing the assembly process of the geared motor 1 shown in FIG. In the process of assembling the geared motor 1, as shown in FIGS. 3 and 8, after the gear box 2 is completed by incorporating the planetary gear mechanisms 21, 22, and 23 inside the gear housing 20, the washer 8 is placed. On the other hand, on the motor 10 side, the holder 7, the wiring board 3, and the like are assembled. Next, the gearbox 2 side and the motor 10 side are overlapped in the rotation center axis L direction. As a result, the plurality of second engaging protrusions 731 enter and engage with the plurality of second engaging holes 26 from the radially inner side, thereby coupling the gearbox 2 side and the motor 10 side. . As a result, the geared motor 1 is completed. The wiring board 3 may be fixed to the holder 7 before or after the assembly.

In this embodiment, when performing the steps shown in FIG. 8 , the holder 7 fixed to the motor 10 and the gear box 2 are held together with the radially outer end 81 of the washer 8 overlapping the stepped portion 272 of the gear housing 20 . It is easy to assemble because it can be combined. 2, the second engagement protrusion 731 of the holder 7 is engaged with the second engagement hole 26 of the gear housing 20 after the assembly is completed. An end portion 81 on the outer peripheral side of the washer 8 can be visually recognized from the matching hole 26 . Therefore, the presence or absence of the washer 8 can be confirmed even at the stage where the geared motor 1 has been assembled.

(Other embodiments)
In the above embodiment, the wiring board 3 is a rigid board, but the present invention may be applied when the wiring board 3 is a flexible wiring board. Even in this case, since the wiring board 3 is protected by the holder 7, it is possible to omit attaching a reinforcing plate or the like to the flexible wiring board.

In the above embodiment, the first engaging portion 16 of the motor 10 was the first engaging hole 160 that engages with the first engaging convex portion 72 of the gearbox support portion 71. The joint portion 16 may be an engaging convex portion that engages with the engaging hole of the gearbox support portion 71 .

In the above embodiment, the second engaging portion 73 of the gearbox support portion 71 was the second engaging protrusion 731 that engages with the second engaging hole 26 of the gear housing 20 , but the gearbox support portion 71 The second engaging portion 73 may be an engaging hole with which the engaging convex portion of the gear housing 20 is engaged.

In the above embodiment, the holder 7 is provided with the substrate supporting portion 76 , but the present invention may be applied to a case where the holder 7 is not provided with the substrate supporting portion 76 . For example, the present invention may be applied when the holder 7 is an annular member having only the gearbox support portion 71 .

DESCRIPTION OF SYMBOLS 1... Geared motor 2... Gearbox 3... Wiring board 4, 4A, 4B... Stator 5... Rotor 7... Holder 8... Washer 10... Motor 11... First end 12... First End plate... second end portion 14... second end plate 16... first engagement portion 19... power supply member 20... gear housing 21, 22, 23... planetary gear mechanism 25... output member 26... Second engagement hole 41 Motor case 42A First coil bobbin 42B Second coil bobbin 43A, 43B Inner stator core 44A, 44B Outer stator core 45 Pole tooth 46A First coil 46B Second coil 50 Rotating shaft 59 Permanent magnet 61 First bearing 62 Second bearing 71 Gear box support 72 First engagement projection 73 Second engagement portion 76... Board supporting part 77... Recessed part 78... Third engaging convex part 151... First terminal block 152... First terminal 153... Second terminal block 154... Second terminal 160... First engaging part Matching hole 190 Connector 201 Internal gear 212, 222, 232 Planetary gear 271 Wall 272 Step 381 First hole 382 Second hole 731 Second engagement Projection 760 Opening 771 First sidewall 772 Second sidewall 781 First projection 782 Second projection G Gap L Rotation center axis L1 Output side L2 …opposite output side, CW…one side, CCW…other side

Claims (8)

a motor;
a holder provided with a gearbox supporting portion that overlaps an output-side end of the motor in the rotation center axis direction;
a gearbox supported on the gearbox support at the output side of the gearbox support;
has
The holder is made of resin,
A geared motor, wherein the motor includes a first engagement portion that engages with the gearbox support portion to hold the gearbox support portion. The geared motor of claim 1, wherein
The gearbox support includes a first engaging protrusion protruding toward the motor,
The geared motor, wherein the first engaging portion includes a first engaging hole into which the first engaging convex portion enters from the output side and engages. The geared motor according to claim 2,
the motor includes an end plate for holding a bearing at the end on the output side;
A geared motor, wherein the end plate is provided with the first engagement hole. In the geared motor according to any one of claims 1 to 3,
The gearbox includes a plurality of gears and a gear housing housing the plurality of gears inside,
The geared motor, wherein the gearbox support includes a second engaging portion that engages with the gear housing to hold the gear housing. The geared motor according to claim 4,
The gear housing is provided with a second engaging hole penetrating in the radial direction,
The geared motor, wherein the second engaging portion includes a second engaging convex portion that enters and engages the second engaging hole from the radially inner side. The geared motor according to claim 4 or 5,
A washer is disposed between the gearbox and the gearbox support,
A geared motor, wherein a radially outer end of the washer is sandwiched between the gear housing and the gear box support. In the geared motor according to any one of claims 4 to 6,
A geared motor, wherein the plurality of gears includes a planetary gear that meshes with an internal gear formed on an inner peripheral surface of the gear housing. In the geared motor according to any one of claims 1 to 7,
Having a wiring board arranged on the outer peripheral side of the motor,
A geared motor, wherein the holder has a substrate support portion extending from the gear box support portion to the outer peripheral side of the motor and supporting the wiring substrate from the inside in a radial direction.

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