KR101190322B1 - Geared motor - Google Patents

Abstract

An object of the present invention is to provide a gear motor capable of improving the quality by increasing the positional accuracy of the support shafts. Moreover, it is difficult to transmit vibration from a gear motor to the apparatus side, and it is providing the gear motor which can suppress generation | occurrence | production of a noise from an apparatus.

In the gear motor 1, the output side end surface 41 of the stator 40 of the motor part 4 is fixed to the plate 2, and the fixing part 21 of the stator 40 to the plate 2 is carried out. The rotor support bearing part 24 extends and is installed to the position which opposes from the output side with respect to). Moreover, while forming the 1st support shaft holding hole 248 which supports the output side edge part of the rotor support shaft 48 in the rotor support bearing part 24 of the plate 2, the gears 51 and 52 are carried out. Second support shaft retaining holes 251, 252 for supporting the half output side ends of the respective gear support shafts 81, 82 of the gear wheels, and the rotation shaft 62 for the half output side of the final gear 6; Since the rotating shaft support hole 262 was formed in the plate, one end part can be hold | maintained on the plate 2 with respect to either of the support shafts of the rotor support shaft 48 and the gear support shafts 51 and 52.

In the gear motor 1 of this embodiment, as the plate 2 to which the motor part 4 is fixed, it is fixed to this plate 2, and the gear support shaft 81 of each cogwheel 51, 52 is fixed. The installation parts 31 and 32 to the apparatus side are formed in the case member 3 in which the some 3rd support shaft holding holes 351 and 352 which hold | maintain the output side edge part of the back side 82 are respectively formed. In other words, the motor portion 4 and the case member 3 are fixed to the plate 2 and do not directly contact each other. Therefore, the vibration from the motor part 4 is not transmitted directly to the case member 3, but is transmitted to the plate 2 once, and is indirectly transmitted to the case member 3 via this plate 2. As a result, vibration from the motor unit 4 is less likely to be transmitted to the apparatus side, and generation of noise from the apparatus side can be suppressed.

Description

Gear motor {GEARED MOTOR}

1 (a) and 1 (b) are a perspective view and an exploded perspective view of a gear motor according to the first embodiment of the present invention, respectively.

2 (a) and 2 (b) are explanatory views showing a plan view showing a part of the gear motor shown in FIG. 1 by cutting and a row of wheels and the like along the line AA ′.

3A, 3B, and 3C are a plan view, a side view, and a bottom view of the gear motor according to Embodiment 2 of the present invention as viewed from the output side, respectively.

4 (a) and 4 (b) are explanatory views showing the cross-sectional view of the gear motor shown in FIG. 3 and the wheel inferiority, respectively.

<Code description>

1 gear motor

2 plate

3 Case member

4 motor part

5 wheel heat

6 Final gear

9 output shaft

24 rotor support bearing

31, 32 mounting part

40 stator

Output section of 41 출력 stator

46 rotor

48 rotor support shaft

51 1 wheel

52 2 wheels

81, 82 gear support shaft

248 1st Support Shaft Retaining Hole

251, 252 Second support shaft retaining hole

351, 352 Third support shaft retaining hole

<Technology field>

The present invention relates to a gear motor in which rotation of the motor portion is output through the wheel train.

BACKGROUND ART [0002]

In general, a geared motor is configured such that rotation output from the motor portion is transmitted to the output shaft through the row of wheels. In such a gear motor, the stator of a motor part is fixed to a fingerboard, the case member is opposed to a fingerboard at the output side of a motor part, and the gearwheel which comprises a wheel row by a fingerboard and a case is comprised. Maintain both ends of the gear support shaft to support the rotatably. Moreover, in the motor part, the rotor support shaft which rotatably supports the rotor with a gear has the end part on the anti-output side held by the stator, while the output side end is held by the case member. The configuration is adopted.

When designing a gear motor, if there is a margin in size in the motor axis direction of the motor section, but there is no margin in size in the planar direction (orthogonal to the motor axis), the wheels on both sides with the fingerboard interposed therebetween. In many cases, a configuration in which columns are arranged in a divided manner is employed. In this case, an upper case and a lower case are disposed on both sides of the fingerboard, and some gear support shafts are held at both ends of the fingerboard and the upper case, and both ends of the other gear support shafts are held at the fingerboard and the lower case.

A gear motor generally consists of a motor part, a gear train which slows rotation of the output shaft of a motor part, and a case which accommodates this gear train and a motor part, and rotation from the rotor of a motor part is output through a gear train. (For example, refer patent document 1).

<Patent Document 1> Publication No. 62-290332

Problem to be solved by invention

However, although the stator is conventionally fixed to the fingerboard, the output side end of the rotor support shaft is held in the case member, and both ends of the gear support shaft are held in the fingerboard and the case member, respectively. The positional accuracy between the wheel support shaft is directly affected by the positional accuracy when the fingerboard and the case member are opposed to each other. For this reason, there exists a problem that the center position precision of gearwheels becomes low easily, and the quality of a gear motor is low.

In particular, when the wheel rows are dividedly arranged on both sides of the fingerboard, the position accuracy between the rotor support shaft and the gear support shaft and the position accuracy of the gear wheels constituting the wheel row (center position accuracy of the gear wheels) Since it is influenced by both the positional accuracy of a fingerboard and an upper case, and the positional precision of a fingerboard and a lower case, it has a problem that it is easy to become low and the quality of a gear motor tends to fall. In addition, when the fingerboard, the upper case, and the lower case are used, the number of parts is increased, and the number of steps for assembling increases, which also increases the cost.

However, in such a gear motor, since a mounting portion for fixing the gear motor to the apparatus side is formed in the case, vibration from the motor is directly transmitted to the apparatus side, resulting in a problem that noise is generated from the apparatus. have.

In view of the above problems, an object of the present invention is to provide a gear motor capable of improving the quality by increasing the positional accuracy of the support shafts.

Another object of the present invention is to provide a gear motor that can hardly transmit vibrations from the gear motor to the apparatus side and can suppress the generation of noise from the apparatus.

MEANS FOR SOLVING THE PROBLEMS [

MEANS TO SOLVE THE PROBLEM In order to solve the said subject, in this invention, rotation of the motor part in which a rotor was rotatably supported by the rotor support shaft, an output shaft, and the gearwheel comprised in the said rotor was carried out to the last gear formed in the said output shaft. In a gear motor having a row of wheels to transmit, the side that is rotated and output from the rotor to the row of wheels in the motor axis direction of the motor unit is called the "output side" and the other is called the "anti-output side". At this time, the output side end surface of the stator of the motor unit is provided with a fixed plate, the plate, which is provided extending to a position opposite to the output side with respect to the fixed portion of the stator to maintain the output side of the rotor support shaft The rotor support bearing part which has 1 support shaft holding hole is formed, and the plurality which comprises the said wheel row is comprised That the gear with each of the plurality of second support shaft holding holes that a plurality of gear support shaft half the output side end portion for rotatably supporting, respectively, the holding is formed features.

In this invention, although the output side end surface of the stator of a motor part is fixed to the plate, in a plate, the rotor support bearing part is extended and provided in the plate to the position which opposes on the output side with respect to the fixed part of the stator. For this reason, while forming the 1st support shaft holding hole which supports the output side of a rotor support shaft in the rotor support bearing part of a plate, the output force side edge part of each gear support shaft of the some gear which comprises a wheel row is provided. By forming the supporting second holding shaft retaining hole in the plate, one end can be held on the plate with respect to any of the supporting shafts of the rotor support shaft and the gear support shaft. Therefore, it is possible to define the mutual positional relationship of the motor unit, the rotor and the wheel row on the plate. Therefore, when forming the plate provided with the 1st support shaft holding hole and the 2nd support shaft holding hole, when the positional precision of such support shaft holding holes mutually raises, about a mutual positional relationship of support shafts, a plate and a case High positional accuracy can be obtained without directly being affected by the positional accuracy with the member.

In this invention, when the 1st support shaft holding hole of the said rotor support bearing part exists in the output side of the said rotor support shaft, the structure which hold | maintains a part in the middle can be employ | adopted, and the output side edge part of this rotor support shaft is hold | maintained. It is also possible to employ a configuration.

In the present invention, a case member for partitioning a space in which the wheel rows are arranged between the plates is mounted on the output side with respect to the plate, and the case member has output side ends of the plurality of gear support shafts, respectively, It is preferable that the some 3rd support shaft holding hole to hold is formed. If comprised in this way, since the output side edge part of a some gear support shaft is hold | maintained by a case member, there exists an advantage that the positional precision of these gear support shafts mutually is high.

In the present invention, the plurality of second support shaft holding holes may adopt a configuration in which the formation positions in the motor axis direction on the plate are different from each other. That is, the some 2nd support shaft holding hole can employ | adopt the structure formed in the different height position on a plate. When comprised in this way, even if the position in the motor-axis direction of the toothed part of a gear | wheel is different, by making the formation position in the motor-axis line direction of a 2nd support shaft holding hole on a plate different, It can respond. Therefore, the semi-output side ends of all the gear support shafts can be supported on the plate, and since the gear support shafts do not need to be supported by other members such as fingerboards, high positional accuracy can be obtained between the gear support shafts. have.

In the present invention, the plurality of second support shaft retaining holes are located from the half output side to the output side as viewed from the plate, or from the half output side as they are directed from the motor portion to the final cogwheel. The structure formed in the position which becomes low toward the output side can be employ | adopted. In other words, the plurality of second support shaft holding holes are located on the plate one after another, at a high place, or sequentially on the plate, at a lower place as they are directed from the motor unit to the final cogwheel. The formed structure can be employ | adopted. When comprised in this way, even if the position in the motor-axis direction of the toothed part of a gearwheel changes continuously, by making the formation position in the motor-axis direction of a 2nd support shaft holding hole on a plate different. It can respond. Therefore, the semi-output side ends of all the gear support shafts can be supported on the plate, so that it is not necessary to support the gear support shafts by other members such as fingerboards, thereby obtaining high position accuracy between the gear support shafts. Can be.

In the present invention, the plurality of second support shaft holding holes may be configured such that the plurality of second support shaft holding holes are arranged in the circumferential direction about the predetermined position toward the final gear. That is, the structure in which the some 2nd support shaft holding hole is formed in the position where the height position changes in a spiral shape on a plate can be employ | adopted. In such a configuration, since the motor portion and the row of wheels can be arranged in three dimensions, the plane size occupied by the motor section and the row of wheels can be reduced.

In this invention, when the said plate consists of a resin molded article, it is preferable that the said 1st support shaft holding hole and the said 2nd support shaft holding hole are formed at the time of resin molding of the said plate.

In this invention, when the said plate consists of a metal plate, it is preferable that the said 1st support shaft holding hole and the said 2nd support shaft holding hole are formed by the deep drawing process with respect to the said metal plate.

In this invention, when the said output shaft and the said final gear are connected by fitting in the fitting hole formed in the other one, the said shaft part and the said fitting hole are each part in at least one place. A configuration having a cross-sectional shape having, for example, a cross-sectional shape such as a polygon, a D-shape, a + shape or the like is adopted. In this case, it is preferable that each part of the said fitting hole is concave from the outer side rather than the position where the virtual extension line of both parts which interpose said each part cross | intersects. Or it is preferable that the said shaft part is recessed inward rather than the position where the virtual extension line of the both sides which interposes said each part cross | intersects. In such a configuration, the shaft portion can be easily fitted into the fitting hole. Moreover, since a force does not concentrate in each part, it can prevent that deformation and damage generate | occur | produce in an axial part. In addition, it is not necessary to cut and process each part by effort.

In the present invention, the stator and the plate are preferably fixed by fastening. If comprised in this way, the efficiency of an assembly operation | work can be improved.

Moreover, in this invention, in the gear motor which has a motor part provided with a rotor and the stator, an output shaft, and the wheel train which transmits rotation of the gearwheel comprised by the said rotor to the said output shaft, the said motor part is fixed and A plate having a support shaft holding hole for holding a plurality of gear support shafts rotatably supporting the plurality of gears constituting the wheel row, respectively, and the plurality of gears fixed to the plate and simultaneously The case member which partitions the space where a gearwheel is arrange | positioned, and the installation part to the apparatus side are provided in the said case member, It is characterized by the above-mentioned.

In the present invention, the plate is preferably formed of a resin. If comprised in this way, since the vibration from a motor part is buffered by the resin plate, it becomes difficult to transmit to the layer and apparatus side further, and the noise from an apparatus can be suppressed.

In the present invention, a configuration in which the plurality of support shaft holding holes for holding the output side ends of the plurality of gear support shafts, respectively, is formed in the case member. If comprised in this way, since the output side edge part of a some gear support shaft is hold | maintained by a case member, there exists an advantage that the positional precision of these gear support shafts mutually is high.

In this invention, the structure in which the output side end surface of the said stator is fixed to the said plate in the motor axial direction can be employ | adopted. In this case, the rotor support is provided with a support shaft holding hole provided in the plate to extend to a position opposite to the fixed portion of the stator on the output side to hold the output side end of the rotor support shaft on which the rotor is rotatably supported. It is preferable that the bearing part is formed. When comprised in this way, since the rotor support bearing part is formed in a plate and the support shaft holding hole which supports the half output side edge part of each cogwheel support shaft of the some gear which comprises a wheel row is formed in a plate, The rotor support bearing portion and one end of the gear support shaft can be held on the plate. Therefore, it is possible to define the mutual positional relationship of the motor unit, the rotor and the wheel row on the plate.

EFFECTS OF THE INVENTION [

In this invention, while forming the 1st support shaft holding hole which supports the output side edge part of a rotor support shaft in the rotor support bearing part of a plate, the semi-output side of each gear support shaft of the some gear which comprises a wheel row Since the plate is provided with a second support shaft holding hole for supporting the end, one end can be held on the plate with respect to any of the support shafts of the rotor support shaft and the gear support shaft. Therefore, it is possible to define the mutual positional relationship of the motor unit, the rotor and the wheel row on the plate. Therefore, when forming the plate provided with the 1st support shaft holding hole and the 2nd support shaft holding hole, when the positional precision of such support shaft holding holes mutually raises, about a mutual positional relationship of support shafts, a plate and a case High positional accuracy can be obtained without directly being affected by the positional accuracy with the member. Therefore, since the center position accuracy of gearwheels can be improved, the quality of a gear motor can be improved.

Moreover, in this invention, the installation part to the apparatus side is formed in the case member which forms the space in which the motor part was fixed, and the space which the several cogwheels which comprise a row of wheels are arrange | positioned between this plate and being fixed to this plate is formed. It is. That is, the motor part and the case member are fixed to the plate, respectively, and are not in direct contact. Therefore, since the vibration from the motor portion is not directly transmitted to the case member but is once transmitted to the plate and indirectly transmitted to the case member through the plate, it is difficult to transmit the vibration from the motor portion to the apparatus side. As a result, generation of noise from the apparatus can be suppressed.

BEST MODE FOR CARRYING OUT THE INVENTION [

With reference to the drawings, a gear motor to which the present invention is applied will be described. In the following description, the side on which the rotation is output in the motor axis direction of the motor unit is referred to as the "output side", and the opposite side is referred to as the "half output side".

Embodiment 1

(Overall configuration)

1 (a) and 1 (b) are a perspective view and an exploded perspective view of a gear motor according to the first embodiment of the present invention, respectively. 2 (a) and 2 (b) are explanatory views showing a plan view showing a part of the gear motor shown in FIG. 1 by cutting away, and a row of wheels and the like along A-A '. In addition, illustration of an output shaft is abbreviate | omitted in FIG.1 (b), FIG.2 (a), (b).

As shown to Fig.1 (a), (b) and Fig.2 (a), (b), the gear motor 1 of this form carries out the rotation output from the motor part 4 from the housing 10. FIG. It is a motor which outputs from the output shaft 9 which protrudes. The housing 10 is provided with the plate 2 and the case member 3 which opposes this plate 2, and the lead line 19 pulls out from the housing 10 to the outside. It is. The plate 2 and the case member 3 are the engaging projections 28 in which the hook 38 which protruded from the outer periphery of the case member 3 to the plate 2 side by the side surface of the plate 2 was formed. It is fixed by engaging in the case, and in the case member 3, mounting parts (connection part) 31 and 32 which are attached to the motor apparatus side as an apparatus in which the gear motor 1 is mounted are formed.

In the gear motor 1 of this aspect, the motor part 4 is the rotor 46 provided with the cylindrical stator 40, the rotor magnet 44 inside the stator 40, and this rotor ( A rotor support shaft 48 for rotatably supporting 46 is provided. The output side end surface 41 of the stator 40 is being fixed by the part 12 which applies several fastening with respect to the surface of the half output side of the plate 2. As shown in FIG.

The rotor support shaft support plate 42 is fixed to the half-output side end surface of the stator 40 by a method such as spot welding, and the half output side end of the rotor support shaft 48 is the rotor support shaft support plate 42. Is inserted into and maintained in the through hole. In addition, the motor part 4 is covered with a side face and a half output side end surface in the motor cover 43 which consists of metal thin boards, and the motor cover 43 located in the half output side of the rotor support shaft support plate 42. The half output side end part of the rotor support shaft 48 abuts on the bottom surface part of the head).

On the other hand, the gear part 13 is comprised in the space formed by the plate 2 and the case member 3 in the output side of the stator 40. As shown in FIG. Moreover, in this embodiment, the plate 2 is provided with the rotor support bearing part 24 which protruded to the output side with the part bent in the middle, and the rotor support bearing part 24 is the plate 2 in the It faces the fixed part 21 of the motor part 4 of this. Here, the rotor support bearing part 24 is provided with the 1st support shaft holding hole 248 which hold | maintains the output side edge part (output side) of the rotor support shaft 48. As shown in FIG. In addition, the rotor 46 is formed as a rotor with a gear having an external gear 47 formed on its outer circumferential surface.

The output shaft 9 is inserted to the intermediate position of the stepped through-hole 60 penetrating in the motor axial direction in the final cogwheel 6, and can rotate integrally with the last cogwheel 6. In other words, the through hole 60 is formed in a substantially hexagonal cross section of the portion where the output shaft 9 is inserted (fitting hole 7), while being substantially hexagonal in cross section of the output shaft 9.

However, in this embodiment, the cross-sectional shape of the output shaft 9 is close to a regular hexagon, whereas the corner portions 71 of the fitting hole 7 are formed on both side portions 72 with the corner portions 71 interposed therebetween. It is concave along the ridge outside the position where the virtual extension line crosses. For this reason, the output shaft 9 can be easily fitted to the fitting hole 7. In addition, since the force does not concentrate on the corners 71, it is possible to prevent the deformation or breakage of the output shaft 9 from occurring. In addition, there is no need to cut the corners 71 with effort. Such a configuration is applied to the case where the output shaft 9 and the fitting hole 7 have a cross-sectional shape having respective parts at at least one location, for example, a cross-sectional shape such as a polygon, a D-shape, or a + shape. In addition to the configuration in which each part of the fitting hole 7 is concave outward from the position where the imaginary extension lines of both parts intersecting the respective parts intersect, on the contrary, the output shaft 9 You may employ | adopt the structure in which each part is recessed inward rather than the position where the virtual extension line of both parts which sandwich this each part intersects.

In the gear motor 1 comprised in this way, the rotor 46 and the last cogwheel 6 are the reduction gears which consist of the wheel row 5 provided with the 1st wheel 51 and the 2nd wheel 52. It is mechanically connected by the mechanism. The first wheel 51 has a larger diameter outer gear cogwheel engaged with each other with the outer gear 47 of the rotor 46 exposed from the gap between the rotor support bearing portion 24 and this larger diameter outer gear cogwheel. It is provided with the small diameter outer gear cogwheel provided in the output side, and is rotatably supported by the 1st cogwheel support shaft 81. The second wheel 52 has a large diameter outer gear cogwheel meshing with the small diameter outer gear cogwheel of the first wheel 51 and a smaller diameter outer gear cogwheel formed on the output side than this large diameter outer gear cogwheel. It is provided with a wheel and is rotatably supported by the 2nd cogwheel support shaft 82. Moreover, the small diameter external gear cogwheel of the 2nd wheel 52 meshes with the external gear of the last cogwheel 6.

In addition, in this embodiment, the gear part 13 is provided with the external gear 47, the wheel row 5, and the last cogwheel 6 of the rotor 46. As shown in FIG.

Here, the gear support shafts 81 and 82 of the first wheel 51 and the second wheel 52 have second support shaft retaining holes 251 and 252 in which the respective half output side ends are formed in the plate 2. Are maintained respectively). That is, in the plate 2, the 2nd support shaft holding hole 251 which supports the half output side edge part of the cogwheel support shaft 81 of the 1st wheel 51 in the position which overlaps substantially with the stator 40 is provided. In the side, the 2nd support shaft holding hole 252 which supports the half output side edge part of the gear support shaft 82 of the 2nd wheel 52 is formed.

Moreover, the output side edge part of the gear support shafts 81 and 82 of the 1st wheel 51 and the 2nd wheel 52 is carried out to the 3rd support shaft holding holes 351 and 352 formed in the case member 3, respectively. Each is maintained.

The final gear 6 has its own both ends as the rotation shafts 61 and 62, and the rotation shaft 62 on the half output side is rotatably supported by the rotation shaft support hole 262 formed in the plate 2. The rotation shaft 61 on the output side is rotatably supported by the rotation shaft support hole 362 formed in the case member 3.

In this way, the outer gear 47, the wheel row 5, and the final gear 6 of the rotor 46 are lined up in a substantially straight line. Here, the engaging portion of the outer gear 47 and the first wheel 51 of the rotor 46, the engaging portion of the first wheel 51 and the second wheel 52, and the second wheel 52 and the final Although the engagement part with the cogwheel 6 differs from each other in the formation position (height position when it sees from the plate 2) in the motor axial direction, the two 2nd support shaft holding holes 251 and 252 are , And are formed at approximately the same height position on the plate 2, and the two third support shaft holding holes 351 and 352 are formed at approximately the same height position on the case member 3.

The plate 2 is made of a resin molded product, and the rotary shaft support hole 262, the first support shaft holding hole 248, and the second support shaft holding holes 251, 252 are used to form the plate 2 when the resin is molded. It is formed at the same time. In addition, the case member 3 is also made of a resin molded product, and the rotation shaft support holes 362 and the third support shaft holding holes 351 and 352 are formed simultaneously with the case member 3 at the time of resin molding. Therefore, in the plate 2, the rotating shaft support hole 262, the 1st support shaft holding hole 248, and the 2nd support shaft holding holes 251 and 252 have high positional accuracy of each other, and the case member 3 Also, the rotation shaft support hole 362 and the third support shaft holding holes 351 and 352 have high positional accuracy with each other.

(Main effect of this form)

As explained above, in the gear motor 1 of this form, although the output side end surface 41 of the stator 40 of the motor part 4 is being fixed to the plate 2, on the plate 2, the stator ( The rotor support bearing part 24 extends and is provided in the position which opposes the fixed part 21 of 40 from the output side. For this reason, while forming the 1st support shaft holding hole 248 which supports the output side edge part (output side) of the rotor support shaft 48 in the rotor support bearing part 24 of the plate 2, the gearwheel Second support shaft retaining holes 251 and 252 for supporting the half output side ends of the respective gear support shafts 81 and 82 of the gears 51 and 52, and a rotation shaft of the half output side of the final gear 6; A rotating shaft support hole 262 for supporting 62 may be formed in the plate 2. Accordingly, one of the ends of the rotor support shaft 48 and the gear support shafts 81 and 82 can be held on the plate 2, and the rotation shaft on the half output side of the final gear 6 can be maintained. Since the 62 can be held on the plate 2, the positional relationship between the motor unit 4, the rotor 46, the wheel row 5, and the output shaft 9 can be defined on the plate 2. Therefore, when forming the plate 2, if the positional precision of the 1st support shaft holding hole 248, the 2nd support shaft holding holes 251, 252, and the rotating shaft support hole 262 is raised, the support shaft will be improved. Regarding the positional relationship between the (48, 81, 82) and the rotation shaft 62, high positional accuracy can be obtained without being directly affected by the positional accuracy of the plate 2 and the case member 3, and the like. That is, since the positional relationship between the motor part 4, the rotor 46, the wheel row 5, and the last cogwheel 6 can be defined on the plate 2, the plate 2 and the case member ( Even if the positional accuracy with 3) is somewhat low, high positional accuracy can be obtained with respect to the positional relationship between the support shafts 48, 81, 82 and the rotational shaft 62. Therefore, since the center position accuracy of gearwheels can be improved, the quality of the gear motor 1 can be improved.

In addition, in this embodiment, the case member 3 is provided with a plurality of third support shaft holding holes 351 and 352 for holding the output side ends of the gear support shafts 81 and 82, respectively. , The output side ends of the gear support shafts 81 and 82 are both held by the case member 3. Therefore, also on the case member 3, the positional precision of the gear support shafts 81 and 82 mutually is high. In addition, the case member 3 is also provided with a rotation shaft support hole 362 for supporting the rotation shaft 61 on the output side of the final gear 6, so that the gear support shafts 81 and 82 and the rotation shaft 61 are formed. ) Position accuracy of each other is also high.

Moreover, in this embodiment, since it is mounted in the motor part 4 on the side of the plate 2, the connection part 31 with the motor apparatus side is formed in the case member 3 side, and therefore, the motor part 4 Vibration generated in this case has the advantage that it is difficult to be transmitted to the motor device through the case member (3).

As described above, in the gear motor 1 of this embodiment, as the plate 2 on which the motor portion 4 is fixed, the teeth of the plurality of gears 51 and 52 are fixed at the same time as the plate 2. In the case member 3 in which the plurality of third support shaft holding holes 351 and 352 holding the output side ends of the wheel support shafts 81 and 82 are formed, Formed. That is, the motor part 4 and the case member 3 are respectively fixed to the plate 2, and are not in direct contact. Therefore, the vibration from the motor part 4 is not transmitted directly to the case member 3, but is transmitted to the plate 2 once, and is indirectly transmitted to the case member 3 via this plate 2. As a result, vibration from the motor unit 4 is less likely to be transmitted to the apparatus side, and as a result, generation of noise from the apparatus can be suppressed.

In addition, in this embodiment, since the plate 2 is made of resin, since the vibration from the motor portion 4 is buffered by the resin plate 2, it is more difficult to be transmitted to the apparatus side. The noise from the device can be suppressed.

In addition, in this embodiment, the case member 3 is provided with a plurality of third support shaft holding holes 351 and 352 for holding the output side ends of the gear support shafts 81 and 82, respectively. , The output side ends of the gear support shafts 81 and 82 are held by the case member 3. Therefore, also on the case member 3, the positional precision of the gear support shafts 81 and 82 mutually is high. In addition, the case member 3 is also provided with a rotation shaft support hole 362 for supporting the rotation shaft 61 on the output side of the final gear 6, so that the gear support shafts 81 and 82 and the rotation shaft 61 are formed. ) Position accuracy of each other is high.

Moreover, in this form, although the output side end surface 41 of the stator 40 of the motor part 4 is being fixed to the plate 2, on the plate 2, the fixing part 21 of the stator 40 is fixed. The rotor support bearing portion 24 extends to the position opposite to the output side. For this reason, while forming the 1st support shaft holding hole 248 which supports the output side edge part of the rotor support shaft 48 in the rotor support bearing part 24 of the plate 2, the gears 51 and 52 are shown. Support shaft holding holes (251, 252) for supporting the half-output side ends of the respective gear support shafts (81, 82), and the rotating shaft (62) on the half-output side of the final gear (6). The rotating shaft support hole 262 can be formed in the plate 2.

Therefore, one end can be held on the plate 2 with respect to any of the rotor support shafts 48 and the gear support shafts 81 and 82, and the semi-output side of the final gear 6 can be maintained. Since the rotating shaft 62 can be held on the plate 2, the positional relationship between the motor unit 4, the rotor 46, the wheel row 5, and the output shaft 9 on the plate 2 can be defined. . Therefore, when the plate 2 is formed, if the positional accuracy of each of the first support shaft retaining holes 248, the second support shaft retaining holes 251 and 252, and the rotation axis shaft holes 262 are increased, About the positional relationship between the axis | shaft 48, 81, 82, and the rotating shaft 62, high positional precision can be obtained, without being influenced by the positional precision of the plate 2 and the case member 3, etc. directly. That is, since the positional relationship between the motor part 4, the rotor 46, the wheel row 5, and the last cogwheel 6 can be defined on the plate 2, the plate 2 and the case member ( Even if the positional accuracy with 3) is somewhat low, high positional accuracy can be obtained with respect to the positional relationship between the support shafts 48, 81, 82 and the rotational shaft 62. Therefore, since the center position accuracy of gearwheels can be improved, the quality of the gear motor 1 can be improved.

Embodiment 2

(Overall configuration)

3A, 3B, and 3C are a plan view, a side view, and a bottom view of the gear motor according to Embodiment 2 of the present invention as viewed from the output side, respectively. 4 (a) and 4 (b) are explanatory views showing the cross-sectional view of the gear motor shown in FIG. 3 and the wheel trains and the like, respectively. In addition, since the basic structure is the same as that of Embodiment 1, the gear motor of this embodiment is demonstrated by attaching | subjecting the same code | symbol to the part which has a common function.

As shown in Fig. 3 (a), (b), (c) and Fig. 4 (a), (b), the gear motor 1 of this form also is similar to the first embodiment from the motor portion 4 It is a motor which outputs the output rotation from the output shaft 9 which protrudes from the housing 10. The housing 10 includes a plate 2 and a case member 3 facing the plate 2, and a bottom plate 49 is fixed to a surface of the plate 2 on the half output side. have. The bottom plate 49 and the plate 2 are connected by bolts 15 at two portions facing each other, and the plate 2 and the case member 3 are separated from the outer circumference of the case member 3. The hook 38 protruding toward the plate 2 side is fixed by engaging the engaging projection 28 formed on the side surface of the plate 2. The case member 3 is provided with mounting portions (connection portions) 31 and 32 to be mounted on the motor device side as a device on which the gear motor 1 is mounted. Moreover, the lead wire 19 is pulled out from the housing 10 outside.

In the gear motor 1 of this aspect, the motor part 4 is the rotor 46 provided with the cylindrical stator 40, the rotor magnet 44 inside the stator 40, and this rotor ( A rotor support shaft 48 for rotatably supporting 46 is provided. The output side end surface 41 of the stator 40 is being fixed to the surface of the half output side of the plate 2 via the bottom plate 49.

While the motor cover 451 is fixed to the half-output side end surface of the stator 40 by a method such as spot welding, it is press-fitted in the rotor 46 around the half-output side end portion of the rotor support shaft 48. The cylindrical member 452 which has the spring property enclosed is arrange | positioned. Moreover, the cylindrical member 452 press-fitted to the rotor 46 abuts in the pressurized state at the half output side edge part of the rotor support shaft 48, and the vibration of the rotor 46 is suppressed. The half output side end of the rotor support shaft 48 is fitted into a hole 453 formed in the motor cover 451.

On the other hand, on the output side of the stator part 40, the gear part 13 is comprised in the space formed by the plate 2 and the case member 3. Moreover, in this embodiment, in the plate 2, the rotor support bearing part 24 which protruded to the output side with the part bent in the middle is formed, and the rotor support bearing part 24 is the plate 2 in the It faces the fixed part 21 of the motor part 4 of this. Here, the rotor support bearing part 24 is provided with the 1st support shaft holding hole 248 which hold | maintains the output side edge part (output side) of the rotor support shaft 48. As shown in FIG. In addition, the rotor 46 is formed as a rotor with a gear having an external gear 47 formed on its outer circumferential surface.

On the output shaft 9, a final cogwheel 6 is formed on its own outer circumferential surface, and the rotor 46 and the final cogwheel 6 are provided with the first wheel 51 and the second wheel 52. It is mechanically connected by the reduction gear mechanism which consists of the wheel row 5. The first wheel 51 outputs a larger diameter outer gear cogwheel that meshes with the outer gear 47 of the rotor 46 exposed from the gap of the rotor support bearing portion 24, and this larger diameter outer gear cogwheel. It is provided with the small diameter external gear cogwheel formed in the side, and is rotatably supported by the 1st cogwheel support shaft 81. The second wheel 52 has a large diameter outer gear cogwheel which meshes with the small diameter outer gear cogwheel of the first wheel 51, and a smaller diameter outer gear cogwheel formed on the output side than this large diameter outer gear cogwheel. And is rotatably supported by the second gear support shaft 82. Moreover, the small diameter external gear cogwheel of the 2nd wheel 52 engages with the external gear of the last cogwheel 6.

In addition, in this embodiment, the gear part 13 is provided with the external gear 47, the wheel row 5, and the last cogwheel 6 of the rotor 46. As shown in FIG.

In the wheel row 5 configured in this manner, the gear support shafts 81 and 82 of the first wheel 51 and the second wheel 52 are each formed at the plate 2 with the half output side ends thereof. It is hold | maintained in 2 support shaft holding holes 251 and 252, respectively. That is, in the plate 2, the 2nd support shaft holding hole 251 which supports the half output side edge part of the cogwheel support shaft 81 of the 1st wheel 51 in the position which overlaps substantially with the stator 40 is provided. In the side, the 2nd support shaft holding hole 252 which supports the half output side edge part of the gear support shaft 82 of the 2nd wheel 52 is formed.

Moreover, the output side edge part of the gear support shafts 81 and 82 of the 1st wheel 51 and the 2nd wheel 52 is carried out to the 3rd support shaft holding holes 351 and 352 formed in the case member 3, respectively. Each is maintained.

In addition, the output shaft 9 is itself a rotating shaft, and the shaft portion 92 protruding from the half output side end portion is rotatably supported by the rotating shaft support hole 292 formed in the plate 2, and output shaft ( The center part in the longitudinal direction of 9) is rotatably supported by the rotating shaft support hole 390 formed in the case member 3.

In the gear motor 1 comprised in this way, the engaging part of the outer gear 47 and the 1st wheel 51 of the rotor 46, the engaging part of the 1st wheel 51 and the 2nd wheel 52, and As shown from (b) of FIG. 4, the engagement part of the 2nd wheel 52 and the last cogwheel 6 is in a different height position in a motor axial direction, and correspondingly, a 2nd support shaft holding hole 251 and 252 are formed in the different height position on the plate 2. That is, in this form, the engaging part of the outer gear 47 and the 1st wheel 51 of the rotor 46, the engaging part of the 1st wheel 51 and the 2nd wheel 52, and the 2nd wheel 52 ) And the engagement portion between the final gear 6, the height position when viewed from the plate 2 is relative to the plate 2 with the direction from the motor part 4 toward the final gear 6. And the position of the output side (higher place), and correspondingly, in this embodiment, the two second support shaft holding holes 251 and 252 are driven from the motor part 4 to the final gear 6. With the direction toward), it is formed in the place (higher place) on the output side on the plate 2 more. In addition, the two second support shaft retaining holes 251 and 252 can be seen from FIG. 4 (a), and the two second support shaft retaining holes 251 and 252 are formed at the center position of the plate 2. Arranged in the circumferential direction from the periphery, the motor part 4, the 1st wheel 51, the 2nd wheel 52, and the last cogwheel 6 were piled up at the center position of the plate 2 in a spiral shape. It is made up.

Here, the plate 2 is made of a resin molded article, and the rotation shaft support hole 292, the first support shaft holding hole 248, and the second support shaft holding holes 251, 252 make the plate 2 resin. It is formed simultaneously with molding. Moreover, the case member 3 also consists of a resin molded article, and the rotating shaft support hole 390 and the 3rd support shaft holding holes 351 and 352 are formed at the same time as the case member 3 at the time of resin molding. Therefore, in the plate 2, the rotating shaft support hole 292, the 1st support shaft holding hole 248, and the 2nd support shaft holding holes 251 and 252 have high positional precision of each other, and the case member 3 Also, the rotation shaft support hole 390 and the third support shaft holding holes 351 and 352 have high positional accuracy with each other.

(Main effect of this form)

As described above, in the gear motor 1 of this embodiment, although the output side end surface 41 of the stator 40 of the motor part 4 is being fixed to the plate 2 similarly to Embodiment 1, the plate ( 2), the rotor support bearing part 24 extends and is installed in the position which opposes the fixed part 21 of the stator 40 by the output side. For this reason, while forming the 1st support shaft holding hole 248 which supports the output side edge part (output side) of the rotor support shaft 48 in the rotor support bearing part 24 of the plate 2, the gearwheel Second support shaft holding holes 251 and 252 for supporting the half output side ends of the gear support shafts 81 and 82 of the gears 51 and 52, and the shaft portion 92 on the half output side of the output shaft 9; The rotating shaft support hole 292 for supporting the can be formed in the plate (2). Accordingly, one of the ends of the rotor support shaft 48 and the gear support shafts 81 and 82 can be held on the plate 2, and the shaft portion on the half output side of the output shaft 9 ( Since 92 can be held on the plate 2, the positional relationship between the motor unit 4, the rotor 46, the wheel row 5, and the output shaft 9 can be defined on the plate 2. Therefore, when forming the plate 2, if the positional accuracy of the 1st support shaft holding hole 248, the 2nd support shaft holding holes 251, 252, and the rotation shaft support hole 292 mutually raises, Regarding the positional relationship between the (48, 81, 82) and the shaft portion 92, high positional accuracy can be obtained without being directly affected by the positional accuracy of the plate 2 and the case member 3, and the like. That is, since the positional relationship between the motor part 4, the rotor 46, the wheel row 5, and the output shaft 9 on the plate 2 can be defined, the plate 2 and the case member 3 are defined. Even if the positional accuracy of is somewhat low, high positional accuracy can be obtained with respect to the positional relationship between the support shafts 48, 81, 82, and the shaft portion 92. Therefore, since the center position accuracy of gearwheels can be improved, the quality of the gear motor 1 can be improved.

Moreover, in this embodiment, since the case member 3 is provided with the some 3rd support shaft holding hole 381 and 382 which hold | maintains the output side edge part of the gear support shafts 81 and 82, respectively. , The output side ends of the gear support shafts 81 and 82 are both held by the case member 3. Therefore, also on the case member 3, the positional precision of the gear support shafts 81 and 82 mutually is high. In addition, the case member 3 is also provided with a rotation shaft support hole 390 for supporting the output shaft 9, so that the positional accuracy of the gear support shafts 81 and 82 and the output shaft 9 is high.

Moreover, in this form, the engaging part of the outer gear 47 and the 1st wheel 51 of the rotor 46, the engaging part of the 1st wheel 51 and the 2nd wheel 52, and the 2nd wheel 52 ) And the second support shaft holding holes 251, 252 are formed at different height positions on the plate 2 in correspondence with the height position of the engagement portion between the final gear 6 and the end gear 6. The 1st wheel 51, the 2nd wheel 52, and the last cogwheel 6 make the structure piled up at the center position of the plate 2 by swirling. For this reason, since the semi-output side edge part of all the gear support shafts 81 and 82 can be supported on the plate 2, since it is not necessary to support a gear support shaft by other members, such as a fingerboard, it supports High positional accuracy can be obtained between the axes 81 and 82. In addition, since the second support shaft holding holes 251 and 252 are formed so that their height positions change in a spiral form around the center position of the plate 2, the motor unit 4 and the first wheel 51 ), The second wheel 52 and the final cogwheel 6 is configured to be stacked in a spiral shape at the center position of the plate 2. For this reason, since the motor part 4 and the wheel row 5 can be arrange | positioned three-dimensionally, the plane size which the motor part 4 and the wheel row 5 occupies can be reduced.

As described above, in the gear motor 1 of this embodiment, as the plate 2 on which the motor portion 4 is fixed, the teeth of the plurality of gears 51 and 52 are fixed at the same time as the plate 2. In the case member 3 in which the plurality of third supporting shaft holding holes 351 and 352 holding the output side ends of the wheel supporting shafts 81 and 82 are formed, respectively, the mounting portions 31 and 32 toward the apparatus side are provided. Formed. That is, the motor part 4 and the case member 3 are respectively fixed to the plate 2, and are not in direct contact. Therefore, the vibration from the motor part 4 is not transmitted directly to the case member 3, but is transmitted to the plate 2 once, and is indirectly transmitted to the case member 3 via this plate 2. Therefore, the vibration from the motor portion 4 becomes less likely to be transmitted to the apparatus side, and as a result, the generation of noise from the apparatus can be suppressed.

In addition, in this embodiment, since the plate 2 is made of resin, since the vibration from the motor portion 4 is buffered by the plate 2 made of resin, it becomes difficult to be transmitted to the device and the device side further. Thus, noise from the apparatus can be suppressed.

In addition, in this embodiment, the case member 3 is provided with a plurality of third support shaft holding holes 351 and 352 for holding the output side ends of the gear support shafts 81 and 82, respectively. , The output side ends of the gear support shafts 81 and 82 are both held by the case member 3. Therefore, also on the case member 3, the positional precision of the gear support shafts 81 and 82 mutually is high. In addition, since the case member 3 is provided with a rotation shaft support hole 390 for supporting the rotation shaft (output shaft 9) on the output side of the final gear 6, the gear support shafts 81, 82 and The positional accuracy of rotation shaft (output shaft 9) mutually is high.

Moreover, in this form, although the output side end surface 41 of the stator 40 of the motor part 4 is being fixed to the plate 2, on the plate 2, the fixing part 21 of the stator 40 is fixed. The rotor support bearing portion 24 extends to the position opposite to the output side. For this reason, while forming the 1st support shaft holding hole 248 which supports the output side edge part of the rotor support shaft 48 in the rotor support bearing part 24 of the plate 2, the gears 51 and 52 are shown. Support shaft holding holes 251, 252 for supporting the half output side ends of the respective gear support shafts 81, 82, and the shaft portion 92 on the half output side of the final gear 6; The rotating shaft support hole 292 can be formed in the plate 2.

Therefore, one end can be maintained on the plate 2 with respect to any of the support shafts of the rotor support shaft 48 and the gear support shafts 81 and 82, and the semi-output of the final gear 6 is also possible. Since the shaft portion 92 on the side can be held on the plate 2, the positional relationship between the motor portion 4, the rotor 46, the wheel row 5, and the output shaft 9 on the plate 2 can be defined. Can be. Therefore, when forming the plate 2, if the positional precision of the 1st support shaft holding hole 248, the 2nd support shaft holding holes 251, 252, and the rotating shaft support hole 262 is raised, the support shaft will be improved. With respect to the positional relationship between the (48, 81, 82) and the shaft portion 92, high positional accuracy can be obtained without being directly affected by the positional accuracy of the plate 2 and the case member 3, and the like. That is, since the positional relationship between the motor part 4, the rotor 46, the wheel row 5, and the last cogwheel 6 can be defined on the plate 2, the plate 2 and the case member ( Even if the positional accuracy with 3) is somewhat low, high positional accuracy can be obtained with respect to the positional relationship between the support shafts 48, 81, 82 and the shaft portion 92. Therefore, since the center position accuracy of gearwheels can be improved, the quality of the gear motor 1 can be improved.

[Other Embodiments]

In the above aspect, since both the plate 2 and the case member 3 are made of a resin molded article, the first support shaft holding holes 248, the second support shaft holding holes 251, 252, and the third support shaft Although the holding holes 351 and 352 are formed simultaneously with the plate 2 and the case member 3 at the time of resin molding, when the plate 2 or the case member 3 is made of a metal plate, deep drawing of the metal plate is performed. It is good to form a support shaft holding hole etc. simultaneously by a process.

Moreover, in Embodiment 2, as the 2nd support shaft holding holes 251 and 252 turn from the motor part 4 to the last cogwheel 6, it is high from the half output side to the output side as seen from the plate 2. Although the structure formed in the position where it becomes is employ | adopted, the engaging part of the outer gear 47 and the 1st wheel 51 of the rotor 46, the engaging part of the 1st wheel 51 and the 2nd wheel 52, and 2 According to the position of the engagement portion between the wheel 52 and the final gear 6, as the second support shaft retaining holes 251, 252 are directed from the motor portion 4 to the final gear 6, You may employ | adopt the structure formed in the position becoming low toward the half output side from the output side when seen from the plate 2.

In addition, although the said form is an example of the preferable embodiment of this invention, it is not limited to this, A deformation | transformation is possible in the range which does not deviate from the main point of this invention. For example, in the said form, although the plate 2 is formed with resin, it is not necessarily limited to resin, You may form with hard rubber, various metals, etc.

Moreover, in the said form, although the 3rd support shaft holding holes 351 and 352 which hold | maintain the output side edge part of the gear support shafts 81 and 82, respectively, are formed in the case member 3, A member for holding the output side ends of the wheel support shafts 81 and 82, respectively, may be formed separately from the case member 3 to be fixed to the case member 3.

Moreover, in the said form, since neither the plate 2 nor the case member 3 consists of a resin molded article, the 1st support shaft holding hole 248, the 2nd support shaft holding holes 251, 252, and 1st 3 The support shaft holding holes 351, 352 and the like are formed at the same time as the plate 2 and the case member 3 at the time of resin molding, but when the plate 2 or the case member 3 is made of a metal plate, What is necessary is just to simultaneously form a support shaft holding hole etc. by the deep drawing process.

Moreover, in the said form, the rotor support bearing part 24 is extended and provided in the plate 2 to the position which opposes the fixed part 21 of the stator 40 at the output side, and the rotor support bearing part ( The first support shaft holding hole 248 supporting the output side end of the rotor support shaft 48 is formed in the 24 and the rotor 46 is rotatably supported, but the blood formed in the rotor 46 itself. (Iii) The bearing part on which the bearing surface is rotatably supported by the bearing surface may be provided in the plate 2.

In this invention, while forming the 1st support shaft holding hole which supports the output side edge part of a rotor support shaft in the rotor support bearing part of a plate, the semi-output side of each gear support shaft of the some gear which comprises a wheel row Since the plate is provided with a second support shaft holding hole for supporting the end, one end can be held on the plate with respect to any of the support shafts of the rotor support shaft and the gear support shaft. Therefore, it is possible to define the mutual positional relationship of the motor unit, the rotor and the wheel row on the plate. Therefore, when forming the plate provided with the 1st support shaft holding hole and the 2nd support shaft holding hole, when the positional precision of such support shaft holding holes mutually raises, about a mutual positional relationship of support shafts, a plate and a case High positional accuracy can be obtained without directly being affected by the positional accuracy with the member. Therefore, since the center position accuracy of gearwheels can be improved, the quality of a gear motor can be improved.

Moreover, in this invention, the installation part to the apparatus side is formed in the case member which forms the space in which the motor part was fixed, and the space which the several cogwheels which comprise a row of wheels are arrange | positioned between this plate and being fixed to this plate is formed. It is. In other words, the motor portion and the case member are fixed to the plate and are not in direct contact with each other. Therefore, since the vibration from the motor portion is not directly transmitted to the case member, but is once transmitted to the plate and indirectly transmitted to the case member through the plate, it is difficult to transmit the vibration from the motor portion to the apparatus side. As a result, generation of noise from the apparatus can be suppressed.

Claims (13)

The rotor is a rotor that is rotatably supported on the rotor support shaft, the output shaft, and a row of wheels for transmitting the rotation of the gear wheels configured in the rotor to the final gear formed on the output shaft In a geared motor having a In the motor axis direction of the motor unit, when the side that is rotated and output from the rotor to the wheel row is the output side, and the other side is the anti-output side, A plate on which an output end surface of the stator of the motor unit is fixed; The plate is provided with a rotor support bearing portion having a first support shaft holding hole which extends to a position opposite from the output side to the fixed portion of the stator and holds the output side of the rotor support shaft. Gears characterized in that a plurality of second support shaft retaining holes are formed to hold the half output side ends of the plurality of gear support shafts rotatably supporting the plurality of gears constituting the wheel row, respectively. motor. The method of claim 1, The first support shaft holding hole is configured to hold an output side end portion of the rotor support shaft. The method according to claim 1 or 2, On the output side with respect to the plate is mounted a case member for partitioning the space in which the wheel row is arranged between the plate, The gear member is provided with a plurality of third support shaft holding holes for holding the output side ends of the plurality of gear support shafts, respectively. The method of claim 1, The plurality of second support shaft holding holes are different from each other in the forming position in the motor axis direction on the plate. 5. The method of claim 4, The plurality of second supporting shaft retaining holes are lowered from the half output side to the output side as viewed from the plate, or lower from the half output side toward the output side as the second gear shaft goes to the final gear. The gear motor, characterized in that formed in the thin position. 6. The method of claim 5, The plurality of second support shaft holding holes are arranged in the circumferential direction about a predetermined position from the motor portion toward the final cogwheel. The method of claim 1, The plate is made of a resin molded article, The first support shaft holding hole and the second support shaft holding hole are formed at the time of resin molding of the plate. The method of claim 1, The plate is made of a metal plate, The first support shaft holding hole and the second support shaft holding hole are formed by a deep drawing process on the metal plate. In a gear motor having a motor unit having a rotor and a stator, an output shaft, and a wheel train for transmitting rotation of a gear wheel configured in the rotor to the output shaft, A plate having a plurality of support shaft holding holes for holding the plurality of gear support shafts rotatably supporting the plurality of gears constituting the wheel row at the same time as the motor unit is fixed, and fixed to the plate; And a case member for partitioning a space in which the plurality of gears is arranged between the plate and a mounting portion on the case side of the case member. 10. The method of claim 9, The plate is formed of a resin, characterized in that the gear motor. 10. The method of claim 9, The gear member is provided with a plurality of support shaft holding holes for holding the output side ends of the plurality of gear support shafts, respectively. 10. The method of claim 9, An output side end face of the stator is fixed to the plate in one of the motor axis directions. 13. The method of claim 12, The plate is provided with a rotor support bearing portion having a support shaft holding hole which extends to a position opposite from the output side with respect to the fixed portion of the stator and holds the output side end of the rotor support shaft on which the rotor is rotatably supported. Gear motor, characterized in that.

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