JP2016098989A - Assembling method of motor built-in type decelerator and motor built-in type decelerator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an assembling method of a motor built-in type decelerator, and the motor built-in type decelerator capable of assembling a deceleration mechanism and a motor in a state that a rotor is not inclined without using a jig, in assembling them.SOLUTION: A rotor assembly A is disposed at an upper part of a stator assembly B. Here, through holes 30 of the rotor 24 are respectively positioned corresponding to projecting portion 71 of a deceleration mechanism portion 50. By guiding each projecting portion 71 to the corresponding through hole 30, an axis of each projecting portion 71 and the center of the corresponding through hole 30 are accurately coaxially positioned. A rotating shaft 22 of the rotor assembly A and a center shaft 68 of the deceleration mechanism portion 50 are coaxially disposed. In this state, the rotor assembly A is moved downward, and the rotating shaft 22 is press-fitted into the center shaft 68 while inserting the projecting portions 71 to the through holes 30.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a method for assembling a motor-integrated speed reducer and a motor-integrated speed reducer.

Patent Documents 1 and 2 are known as motor-integrated speed reducers.
In Patent Document 1, a carrier that eccentrically rotates a planetary gear of a planetary reduction gear and a rotor of a motor are connected via a connecting member, and the rotor is connected to a bearing rod that is integrally connected to an output shaft of the planetary reduction gear. The ring is held rotatably.

  In Patent Document 2, the rotor of the motor and the input member of the involute speed reducer are integrally connected. When the motor rotates, the first eccentric portion and the second eccentric portion of the input member rotate. The first rocking member and the second rocking member supported on the inner peripheral sides of the first eccentric portion and the second eccentric portion rotate the rotor of the motor at the rotation speed of the input member as the input member rotates. It is designed to revolve around the axis. Since the first and second swinging members are partially engaged with the external teeth of the fixed sun gear, the difference between the number of teeth of the external teeth of the internal gear and the fixed sun gear while revolving. The first and second oscillating members rotate about the eccentric axis that is eccentric from the rotation axis of the rotor. A pin is inserted through each insertion hole provided in the first and second swinging members, and both ends of the pin are supported by an output member and a pin that are rotatably supported around the rotation axis of the rotor. It is connected to the support member. The rotation of the first and second oscillating members is transmitted to the output member when a rolling bearing externally attached to the outer periphery of the pin comes into contact with the insertion holes.

JP 2000-120810 A JP 2012-206609 A

In Patent Document 1, there is no specific disclosure of a method of assembling the speed reducer and the motor, but the following two methods are conceivable as the method of assembling.
One is a method of assembling the speed reducer to the motor, and the other is a method of assembling the motor to the speed reducer.

  When the speed reducer is assembled to the motor, the bearing rod of the rotor is held only by the bearing on one side of the motor side housing to which the stator is assembled before the assembly. For this reason, if the rotor is not sufficiently held, the rotor tilts, and the rotor and the stator may come into contact with each other during assembly. Therefore, in order to avoid contact between the rotor and the stator, the rotor rod is extended from the bearing to the outside until the speed reducer is assembled, and the extended portion is held by a jig and the rotor is tilted. It is necessary to avoid.

  When assembling a motor (that is, a motor-side housing with a stator assembled) to the reduction gear, the output shaft of the reduction gear is connected in advance to the bearing rod, and a rotor is attached to the bearing rod in advance. deep.

  In this case, until the motor (motor side housing) is assembled to the speed reducer, the output shaft (bearing rod) is held only by the bearing of the speed reducer side housing. The rotor may tilt. Therefore, in order to avoid contact between the rotor and the stator at the time of assembly, a jig is inserted from the outside into the through hole provided in the motor side housing, and the bearing rod is held by the jig to hold the rotor. It is necessary not to tilt.

  In Patent Document 2, a configuration in which the rotor is supported with respect to the housing via a bearing is necessary, but the position of the bearing is not specified and clearly described. For this reason, in patent document 2, the assembly method of a motor and a reduction gear is unknown.

  An object of the present invention is to provide a motor-integrated speed reducer assembly method and a motor-integrated speed reducer that can be assembled without tilting a rotor when a speed reduction mechanism and a motor are assembled.

  In order to solve the above problems, the motor-integrated speed reducer assembling method of the present invention is such that the motor rotation shaft and the input shaft of the speed reduction mechanism are coaxially arranged, and the rotation shaft has a hole. The reduction mechanism includes a first sun gear and a second sun gear arranged coaxially with the input shaft, a first planetary gear meshing with the first sun gear, and the first planetary gear. A plurality of planetary gear sets having a second planetary gear that rotates together with the second sun gear and a carrier that rotatably supports the plurality of planetary gear sets; In the assembling method of the motor-integrated speed reducer in which the mechanism and the motor are integrated, the connecting portion extended from the carrier is inserted as a guide into the hole in the rotor, and assembled integrally. The rotating shaft and the input It is intended to place the shaft on the same axis.

  With the above configuration, the rotor does not tilt by inserting the connecting portion extending from the carrier as a guide into the rotor hole. As a result, a jig for preventing the rotor from tilting is not required when the motor and the rotor are assembled.

Further, after the connecting portion is inserted into the hole of the rotor, the rotating shaft and the input shaft may be press-fitted to each other and connected.
According to said structure, said effect | action is realizable in the assembly | attachment method of the motor integrated reduction gear with which the rotating shaft and the input shaft mutually fitted.

  In the method of assembling the motor-integrated speed reducer, the first planetary gear and the second planetary gear are rotatably supported around a fixed shaft provided in the carrier, and the connecting portion It is good also as a protrusion part extended from the said fixed axis | shaft.

According to said structure, since a fixed shaft and a connection part are integrated, the number of parts does not increase compared with the case where a fixed shaft and a connection part are each comprised by a separate member.
In the method of assembling the motor-integrated speed reducer, the connecting portion may be a connecting member that is integrally connected to the carrier.

According to said structure, the effect | action of this invention can be implement | achieved in the assembly | attachment method of the motor integrated reduction gear which made the connection part the connection member integrally connected with respect to the said carrier.
The motor-integrated speed reducer has a rotation shaft of the motor and an input shaft of the speed reduction mechanism arranged coaxially, and the rotation shaft has a rotor having a hole, and the speed reduction mechanism is coaxial with the input shaft. The first sun gear and the second sun gear arranged above, the first planetary gear meshing with the first sun gear, and the first planetary gear rotating together and meshing with the second sun gear. A plurality of planetary gear sets having a second planetary gear; and a carrier that rotatably supports the plurality of planetary gear sets, the coupling extending from the carrier to the hole of the rotor The parts are inserted and connected, and the rotation shaft and the input shaft are arranged coaxially.

  According to the motor-integrated speed reducer, when the speed reduction mechanism and the motor are assembled, it is possible to employ a method that allows the rotor to be assembled without tilting without requiring a jig.

  According to the method for assembling the motor-integrated speed reducer and the motor-integrated speed reducer of the present invention, when assembling the speed reduction mechanism and the motor, the rotor can be assembled without tilting without requiring a jig.

Sectional drawing of the motor integrated reduction gear of 1st Embodiment. Explanatory drawing of the assembly | attachment method of the motor integrated reduction gear of 1st Embodiment. The top view of a rotor. FIG. 4 is a sectional view taken along line 4-4 of FIG. FIG. 5 is a sectional view taken along line 5-5 in FIG. Sectional drawing of the motor integrated reduction gear of 2nd Embodiment. Explanatory drawing of the assembly | attachment method of the motor integrated reduction gear of 2nd Embodiment.

(First embodiment)
Hereinafter, a motor-integrated speed reducer according to a first embodiment of the present invention and an assembling method thereof will be described with reference to FIGS.

As shown in FIG. 1, the motor-integrated speed reducer is configured by integrally connecting a motor unit 10 as a motor and a speed reduction mechanism unit 50 as a speed reduction mechanism.
(Motor unit 10)
The motor unit 10 includes a motor housing 12 including a cylindrical motor housing main body 14 and a lid body 16 that closes an opening on one end side of the motor housing main body 14. The motor unit 10 has a stator 18 fixed in the motor housing main body 14, a rotating shaft 22 rotatably supported on the lid 16 via a bearing 20, and a rotating shaft 22. And a rotor 24 that is coaxially fitted and fixed. The bearing 20 is fitted in the opening of the lid body 16.

  The stator 18 is fitted and fixed to the inner peripheral wall of the motor housing 12. A plurality of cores are equally arranged in the circumferential direction so as to face each other across the rotation shaft 22 on the inner circumference of the stator 18, and a coil (not shown) is provided around each core by winding a conducting wire. A magnetic pole is formed.

  The rotor 24 is a cylindrical member that is press-fitted and fixed to the rotary shaft 22. As shown in FIG. 3, a plurality of permanent magnets 26 are fixed to the outer periphery of the rotor 24 so that the polarities are alternately arranged in the circumferential direction. Has been.

  As shown in FIG. 1, the rotating shaft 22 of the rotor 24 is fitted and integrally connected to a center shaft 68 as an input shaft of a speed reduction mechanism unit 50 described later. They are arranged facing each other with a slight air gap.

  The motor unit 10 rotates the field generated by each pair of magnetic poles in one direction by sequentially switching the currents flowing through the coils of the respective magnetic poles by generating a pair of two magnetic poles facing each other of the stator 18. As a result, the rotor 24 whose permanent magnet 26 receives the rotational force from the field rotates. As described above, the motor unit 10 is configured as a brushless DC motor.

  As shown in FIGS. 1 and 3, the rotor 24 includes a plurality of holes 30 having circular cross-sections penetrating in the axial direction so as to be positioned around the rotary shaft 22 at a predetermined pitch (in FIG. 3, 10. Pieces). In the brushless DC motor, the punch hole 30 is provided for phase alignment between a rotation angle sensor (not shown) attached to the rotary shaft 22 and the permanent magnet 26. This phase alignment method is well known and has no relation to the present invention, and therefore the description thereof is omitted.

  In FIG. 3, ten punch holes 30 are provided, but the shape and number of the punch holes 30 are not limited to this embodiment, and the rotor 24 satisfies the required strength and has a rotational balance. An appropriate shape and number can be obtained under the condition that it can be held.

(Deceleration mechanism 50)
As shown in FIG. 1, the speed reduction mechanism 50 is screwed into a reduction gear housing 52 that is cylindrical and has both ends in the axial length direction opened, and a female screw in the opening on the motor portion 10 side of the reduction gear housing 52. And an attachment ring member 54.

  The attachment ring member 54 includes a ring main body 56 screwed into the female screw, and an attachment flange 58 projecting outward from the end of the reduction gear housing 52 from the ring main body 56. The reduction gear housing 52 is fastened to the end surface of the motor housing main body 14 of the motor housing 12 by a mounting bolt 60 via a mounting flange 58.

A carrier 62 is attached to the ring main body 56 of the attachment ring member 54 via a bearing 61. The carrier 62 includes a first carrier body 64 and a second carrier body 66.
The first carrier body 64 and the second carrier body 66 are each formed in a disk shape, and a plurality of connecting protrusions 64a and 66a protrude from surfaces facing each other. Then, the connecting bolt 67 inserted and screwed into the connecting protrusions 64a and 66a from the side surface of the second carrier body 66 on the side opposite to the motor part 10 in a state where the tip surfaces of the connecting protrusions 64a and 66a are in contact with each other. Thus, the first carrier body 64 and the second carrier body 66 are integrally connected.

  The carrier 62 is rotatable with respect to the speed reducer housing 52 because the outer periphery of the first carrier body 64 is attached to the attachment ring member 54 via the bearing 61. Further, a center shaft 68 is fixed through each central portion of the first carrier body 64 and the second carrier body 66. The center shaft 68 is formed in a tubular shape as a whole, and is disposed coaxially with the rotating shaft 22 on the motor unit 10 side, and the rotating shaft 22 is press-fitted and connected.

  As shown in FIG. 1, a plurality of fixed shafts 70 having a circular cross section are inserted and fixed between the first carrier body 64 and the second carrier body 66 so as to be installed. Further, one end of the fixed shaft 70 is provided so that a protruding portion 71 protruding toward the motor unit 10 is coaxial and has the same diameter as the fixed shaft 70, and is inserted into the hole 30 of the rotor 24 of the motor unit 10. . In addition, the fixed shaft 70 is arranged so that its axis is concentric with the center of the hole 30. The protruding portion 71 is an example of a connecting portion.

  In this embodiment, the outer diameters of the protrusion 71 and the fixed shaft 70 are the same as the inner diameter of the punch hole 30. However, if the outer diameter of the protrusion 71 and the inner diameter of the punch hole 30 are the same, the fixed diameter is fixed. The outer diameter of the shaft 70 may not be the same as the outer diameter of the protrusion 71. For example, the outer diameter of the protrusion 71 may be smaller than the outer diameter of the fixed shaft 70.

  In the present embodiment, the projecting portion 71 is inserted into the punched hole 30 so as to be integrally connected to the rotor 24. Thereby, the rotor 24 and the carrier 62 can rotate integrally.

  Note that the protrusion 71 protrudes from the first carrier body 64 so that the protrusion 71 starts to be inserted into the hole 30 of the rotor 24 before the rotary shaft 22 is press-fitted into the center shaft 68. (That is, the protruding length) is set.

  In the present embodiment, the number of fixed shafts 70 is ten, and each fixed shaft 70 is arranged at the same pitch as the holes 30 of the rotor 24. The fixed shaft 70 is disposed in parallel with the center shaft 68. A taper surface 71a having a diameter that decreases toward the tip is formed at the tip of the protruding portion 71, and the taper surface 71a functions as a guide for insertion into the hole 30.

  As shown in FIG. 1, between the first carrier body 64 and the second carrier body 66, the fixed shaft 70 has a plurality of first planetary gears (external teeth) 72 and a plurality of second planetary gears (external teeth). 74 are juxtaposed and rotatably supported. The second planetary gear 74 has a large-diameter portion 75 disposed on the second carrier body 66 side and having gear teeth, and a small-diameter portion 76 disposed on the first carrier body 64 side and not formed with teeth. . Each first planetary gear 72 is fitted and fixed to the small-diameter portion 76 so as to be rotatable around a fixed shaft 70 via a needle bearing 77 integrally with the second planetary gear 74. The first planetary gear 72 and the second planetary gear 74 that rotates together with the first planetary gear 72 constitute a planetary gear set.

  As shown in FIG. 1, the first carrier body 64 meshes with a ring-shaped fixed internal gear 80 that is fastened and fixed to the ring main body 56 by bolts 82. The second carrier body 66 is meshed with a link-like internal gear 86 attached to the inner peripheral surface of the reduction gear housing 52 via bearings 84 and 85. The fixed internal gear 80 and the internal gear 86 are arranged coaxially with the center shaft 68. The fixed internal gear 80 corresponds to a first sun gear, and the internal gear 86 corresponds to a second sun gear. In the present embodiment, the fixed internal gear 80 and the internal gear 86 as sun gears are circumscribed with respect to the first planetary gear 72 and the second planetary gear 74, respectively.

  A disc-shaped output member 90 is fastened and fixed to the end face of the internal gear 86 on the side opposite to the motor unit 10 by a bolt 88. Further, the center portion of the output member 90 holds the center shaft 68 through a bearing 92 so as to be rotatable.

  Therefore, the center shaft 68 and the rotating shaft 22 are rotatably supported by the lid body 16 via the bearing 20 and are also rotatably supported by the output member 90 via the bearing 92.

As described above, the speed reduction mechanism unit 50 of the present embodiment is configured by a carrier input type planetary gear mechanism.
Next, the operation of the motor-integrated speed reducer configured as described above will be described.

  When the rotor 24 of the motor unit 10 rotates, the center shaft 68 and the rotation shaft 22 and the rotor 24 and the carrier 62 are integrally connected and fixed, so that the rotation shaft 22 and the carrier 62 rotate. Due to the rotation of the carrier 62, the first planetary gear 72 meshing with the fixed internal gear 80 rotates around the fixed shaft 70. That is, the first planetary gear 72 revolves and rotates. By the rotation of the first planetary gear 72, the second planetary gear 74 fixed to the first planetary gear 72 rotates. Due to the rotation of the second planetary gear 74, the internal gear 86 meshing with the second planetary gear 74 rotates, and the output member 90 fixed to the internal gear 86 rotates in the same direction as the internal gear 86.

  Here, when the number of teeth of the fixed internal gear 80 is Z1, the number of teeth of the first planetary gear 72 is Z2, the number of teeth of the second planetary gear 74 is Z3, and the number of teeth of the internal gear 86 is Z4, The reduction ratio of the reduction mechanism unit 50 is as follows.

Reduction ratio = Z1 / (Z1, Z2-Z3, Z4)
(Mounting method of motor-integrated reducer)
Next, a method for assembling the motor-integrated speed reducer of this embodiment will be described with reference to FIG.

  For convenience of explanation, it is assumed that the speed reduction mechanism unit 50 is assembled in advance as shown in FIG. Further, as shown in FIG. 2, a rotor assembly A is a rotor assembly 22 in which the rotating shaft 22 of the rotor 24 is assembled in advance to the lid body 16 via a bearing 20. Further, a stator assembly B in which the stator 18 is assembled in advance to the motor housing main body 14 is referred to as a stator assembly B. In this way, before assembling the rotor assembly A, the motor stator assembly B is assembled integrally with the reduction mechanism 50.

  First, the stator assembly B is assembled to the reduction mechanism unit 50 with the mounting bolt 60. Next, the rotor assembly A is disposed above the stator assembly B. In this case, the respective holes 30 of the rotor 24 are arranged so as to be opposed to the respective protrusions 71 of the speed reduction mechanism unit 50. This relative arrangement does not need to be performed accurately and may be rough. In this state, the rotor assembly A is moved downward.

  Then, first, the tapered surface 71a of each protrusion 71 is brought into contact with the opening peripheral edge of the corresponding hole 30 and the rotor assembly A is guided, whereby the hole 30 corresponding to the axis of each protrusion 71 is respectively provided. Are accurately arranged so that their centers are coaxial.

  Further, the rotating shaft 22 of the rotor assembly A and the center shaft 68 of the speed reduction mechanism 50 are arranged on the same axis, although they are still separated from each other. As a result, the space between the rotor 24 and the stator 18 is in a state where the air gap can be secured.

  In this state, the rotor assembly A is further moved downward, and the rotary shaft 22 is press-fitted into the center shaft 68 while inserting the projections 71 into the respective punch holes 30. That is, the rotor assembly A moves downward while being guided by the protrusion 71.

  After the press-fitting of the rotating shaft 22 to the center shaft 68 is completed, the lid body 16 of the rotor assembly A is fastened and fixed to a bolt (not shown) with respect to the motor housing main body 14 to complete the assembly.

This embodiment has the following features.
(1) In the method of assembling the motor-integrated speed reducer according to the present embodiment, the protruding portion 71 (connecting portion) extending from the carrier 62 is inserted into the hole 30 of the rotor 24 as a guide and integrally assembled. Thus, the rotary shaft 22 and the center shaft 68 (input shaft) are arranged coaxially. As a result, when assembling the speed reduction mechanism portion and the motor portion, the rotor can be assembled without tilting without requiring a jig.

Moreover, when connecting a reduction mechanism part and a motor part, both can be connected, without requiring a coupling. Therefore, the total length of the motor-integrated speed reducer can be shortened.
In addition, since the bottom wall for partitioning the reduction gear housing 52 is not required on the reduction gear housing 52 side of the motor housing main body 14, it is possible to measure and to process the bottom wall. There is nothing to do.

  (2) In the method of assembling the motor-integrated speed reducer according to the present embodiment, after the protruding portion 71 (connecting portion) extending from the carrier 62 is inserted into the hole 30 of the rotor 24, the rotating shaft 22 and the center shaft 68 (input shaft) are press-fitted together and connected. As a result, according to the present embodiment, in the method for assembling the motor-integrated speed reducer in which the rotating shaft and the input shaft are fitted to each other, the effect (1) can be easily realized.

  Further, since the rotation shaft 22 of the motor unit and the bearings 20 and 92 of the center shaft 68 (input shaft) of the reduction mechanism unit can be shared, the rotation shaft 22 and the center shaft 68 (input shaft) of the reduction mechanism unit are individually provided. Compared to the case where a bearing is provided, the number of parts can be reduced.

  (3) In the method of assembling the motor-integrated speed reducer of this embodiment, the first planetary gear 72 and the second planetary gear 74 are rotatably supported around the fixed shaft 70 provided on the carrier 62. is there. Further, the protruding portion 71 (connecting portion) extended from the carrier 62 is extended from the fixed shaft. As a result, since the fixed shaft 70 and the projecting portion 71 (connecting portion) are integrated, the number of parts does not increase as compared with the case where the fixed shaft and the connecting portion are formed of separate members.

  (4) In the motor-integrated speed reducer of the present embodiment, the rotation shaft 22 of the motor unit 10 and the center shaft 68 (input shaft) of the speed reduction mechanism unit 50 are coaxially arranged. A rotor 24 having 30; Further, the speed reduction mechanism unit 50 includes a fixed internal gear 80 (first sun gear) and an internal gear 86 (second sun gear) arranged coaxially with the center shaft 68 (input shaft). Further, the speed reduction mechanism unit 50 rotates in unison with the first planetary gear 72 meshed with the fixed internal gear 80 (first sun gear), the first planetary gear 72, and the internal gear 86 (second sun gear). And a plurality of planetary gear sets having meshing second planetary gears 74. The speed reduction mechanism unit 50 includes a carrier 62 that rotatably supports a plurality of planetary gear sets. In the motor-integrated speed reducer, the projecting portion 71 (connecting portion) extending from the carrier 62 is inserted into and connected to the hole of the rotor 24, and the rotation shaft 22 and the center shaft 68 (input shaft) are connected. Are arranged on the same axis.

  As a result, in the motor-integrated speed reducer of the present embodiment, when the speed reduction mechanism unit 50 and the motor unit 10 are assembled, it is possible to employ a method that allows the rotor to be assembled without tilting without requiring a jig.

(Second Embodiment)
Next, a motor-integrated speed reducer according to a second embodiment and an assembling method thereof will be described with reference to FIGS. Note that the motor-integrated speed reducer of the second embodiment differs from the motor-integrated speed reducer of the first embodiment only in a part of the configuration, so that the description will focus on the different configurations, and the same configuration or equivalent The same reference numerals are assigned to the components to be described, and the description thereof is omitted.

  In the present embodiment, as shown in FIG. 2, instead of the protrusion 71 as the connecting portion of the fixed shaft 70 being omitted, a plurality of connecting pins 94 are attached to the mounting holes 98 of the first carrier body 64. The connecting pin 94 is press-fitted and fixed until it is locked to a locking flange 96 provided on the outer periphery of the base end. In FIGS. 6 and 7, only one connecting pin 94 is shown. The connection pin 94 is an example of a connection part. The connecting pin 94 corresponds to a connecting member.

  The plurality of connecting pins 94 have a circular cross section, are arranged so as to face the punched holes 30 of the rotor 24, and are inserted into the punched holes 30. In other words, the connecting pin 94 is disposed so that its axis is opposed to the center of the punched hole 30.

  In this embodiment, the number of connecting pins 94 is half the number of the punched holes 30, and the connecting pins 94 are inserted into every other punched hole 30 in the rotational direction so that the rotation balance of the rotor 24 is maintained. Has been. Note that the number of connecting pins 94 may be the same as the total number of the through holes 30 of the rotor 24. Further, the number and arrangement of the connecting pins 94 may be any number and arrangement that can balance the rotation of the rotor 24 when that number of connecting pins 94 are inserted into the punched holes 30.

  In the present embodiment, the connecting pin 94 is inserted into the punched hole 30 so as to be integrally connected to the rotor 24. Thereby, the rotor 24 and the carrier 62 can rotate integrally.

  In addition, the connecting pin 94 protrudes from the first carrier body 64 so as to be inserted into the hole 30 of the rotor 24 before the rotating shaft 22 is press-fitted into the center shaft 68 ( That is, the protruding length) is set.

Further, the tip of the connecting pin 94 is formed with a tapered surface 94a having a smaller diameter toward the tip, and the tapered surface 94a functions as a guide when inserted into the punching hole 30.
(Mounting method of motor-integrated reducer)
Next, a method for assembling the motor-integrated speed reducer of this embodiment will be described with reference to FIG.

For convenience of explanation, it is assumed that the speed reduction mechanism unit 50 is assembled in advance as shown in FIG.
As shown in FIG. 7, first, the stator assembly B is assembled to the reduction mechanism unit 50 with the mounting bolt 60. Next, the rotor assembly A is disposed above the stator assembly B. In this arrangement, the holes 30 of the rotor 24 are arranged so as to be opposed to the connecting pins 94 of the speed reduction mechanism 50, respectively. This relative arrangement does not need to be performed accurately and may be rough. In this state, the rotor assembly A is moved downward.

  Then, first, the tapered surface 94a of each connecting pin 94 is brought into contact with the opening peripheral edge of the opposing punching hole 30, and the rotor assembly A is guided, whereby the punching hole 30 corresponding to the axis of each connecting pin 94 is respectively provided. Are accurately arranged so that their centers are coaxial.

  Further, the rotating shaft 22 of the rotor assembly A and the center shaft 68 of the speed reduction mechanism unit 50 are arranged in a coaxial manner, although they are still separated from each other. As a result, the gap between the rotor 24 and the stator 18 is in a state where the air gap can be secured as in the first embodiment.

  In this state, the rotor assembly A is further moved downward, and the rotary shaft 22 is press-fitted into the center shaft 68 while the connecting pins 94 are inserted into the punched holes 30. That is, the rotor assembly A moves downward while being guided by the connecting pin 94.

  After the press-fitting of the rotating shaft 22 to the center shaft 68 is completed, the lid body 16 of the rotor assembly A is fastened and fixed to a bolt (not shown) with respect to the motor housing main body 14 to complete the assembly.

This embodiment has the following features.
(1) In the motor-integrated speed reducer and its assembling method of the present embodiment, the connecting portion is a connecting pin 94 (connecting member) integrally connected to the carrier 62. The effect described in 1) can be similarly realized.

In addition, embodiment of this invention is not limited to the said embodiment, You may change as follows.
-In 1st Embodiment and 2nd Embodiment, although the motor part 10 was comprised as a brushless DC motor, it is good also as a motor with a brush.

-You may change into the carrier input type planetary gear mechanism other than 1st Embodiment and 2nd Embodiment.
For example, the following may be used. That is, instead of omitting both the fixed internal gear 80 and the internal gear 86 as the sun gear, the sun gear inscribed with each of the first planetary gear 72 and the second planetary gear 74 is rotated around the center shaft 68. It may be provided freely.

  Alternatively, the fixed internal gear 80 of the first and second embodiments is left as it is, the internal gear 86 is omitted, and a sun gear inscribed with respect to the second planetary gear 74 is used instead of the internal gear 86 as a center shaft. It may be provided so as to be rotatable around 68.

  The center shaft 68 of the speed reduction mechanism unit 50 may be a solid body, the rotating shaft 22 of the motor unit 10 may be cylindrical, and the center shaft 68 may be press-fitted into the rotating shaft 22 and connected. .

  In addition, when the center shaft 68 is a solid body, the entire rotation shaft 22 of the motor unit 10 does not need to be cylindrical, and a cylinder portion into which the center shaft 68 can be press-fitted is provided only at the end of the rotation shaft 22. The remaining part may be a solid body.

  -In 1st Embodiment and 2nd Embodiment, although the center shaft 68 and the rotating shaft 22 of the deceleration mechanism part 50 were connected by press injection, it is not necessary to connect the center shaft 68 and the rotating shaft 22 integrally. For example, the center shaft 68 and the rotating shaft 22 may be spaced apart and arranged coaxially.

  In the first embodiment, the protrusions 71 are inserted into all of the holes 30 of the rotor 24, respectively, but it is not necessary to insert the protrusions 71 into all of the holes 30 of the rotor 24. You may insert the protrusion part 71 with respect to. In this case, the protrusion 71 is arranged so that the rotational balance of the rotor 24 is not lost.

  For example, when the punch hole 30 is disposed at a position 180 ° opposite to the rotation axis 22 and the two protrusions 71 are used, the hole 30 is positioned at a position opposite to the rotation angle 180 °. The protrusion 71 is inserted into the hole 30 to be cut. Similarly, when three or more are used, the protrusions 71 are arranged so that the rotational balance of the rotor is not lost.

In the above-described embodiment, the protruding portion 71 of the fixed shaft 70 of the first embodiment and the connecting pin 94 of the second embodiment are used as the connecting portion, but the connecting portion may be formed integrally with the carrier 62.
-You may abbreviate | omit the taper surface 71a of the protrusion part 71 of 1st Embodiment, and the taper surface 94a of the connection pin 94 of 2nd Embodiment. In this case, the projections 71 are guided by the opposed punching holes 30 so that the centers of the punching holes 30 corresponding to the axial centers of the projections 71 can be accurately arranged. it can.

10 ... motor part (motor), 12 ... motor housing,
14 ... motor housing body, 16 ... lid, 18 ... stator,
20 ... Bearing, 22 ... Rotating shaft, 24 ... Rotor, 26 ... Permanent magnet,
30 ... Punching hole, 50 ... Reduction mechanism (deceleration mechanism), 52 ... Reduction gear housing,
54 ... Mounting ring member, 56 ... Ring body, 58 ... Mounting flange,
60 ... mounting bolt, 61 ... bearing, 62 ... carrier,
64 ... 1st carrier body, 64a ... Connection protrusion, 66 ... 2nd carrier body,
66a ... connecting projection, 67 ... connecting bolt, 68 ... center shaft (input shaft),
70 ... fixed shaft, 71 ... projecting part (connecting part), 71a ... taper surface,
72 ... 1st planetary gear, 74 ... 2nd planetary gear, 75 ... Large diameter part, 76 ... Small diameter part,
77 ... Needle bearing, 80 ... Fixed internal gear (first sun gear),
82 ... Bolt, 84 ... Bearing, 85 ... Bearing, 86 ... Internal gear (second sun gear),
88 ... bolt, 90 ... output member, 92 ... bearing,
94: Connecting pin (connecting member, connecting portion), 94a: Tapered surface,
96: A locking flange.

Claims (5)

The rotation shaft of the motor and the input shaft of the speed reduction mechanism are arranged on the same axis,
The rotating shaft has a rotor having a hole,
The deceleration mechanism is
A first sun gear and a second sun gear arranged coaxially with the input shaft;
A first planetary gear meshing with the first sun gear;
A plurality of planetary gear sets having a second planetary gear that rotates integrally with the first planetary gear and meshes with the second sun gear;
A carrier that rotatably supports the plurality of planetary gear sets,
In the assembling method of the motor-integrated speed reducer in which the speed reduction mechanism and the motor are integrated,
Assembling the motor-integrated speed reducer in which the connecting portion extending from the carrier is inserted into the rotor hole as a guide and integrally assembled, and the rotating shaft and the input shaft are arranged coaxially. Method.   The motor-integrated speed reducer assembly method according to claim 1, wherein after the connecting portion is inserted into the hole of the rotor, the rotating shaft and the input shaft are press-fitted to each other and connected. The first planetary gear and the second planetary gear are rotatably supported around a fixed shaft provided on the carrier,
The method for assembling the motor-integrated speed reducer according to claim 1, wherein the connecting portion is a projecting portion extending from the fixed shaft.   The method for assembling the motor-integrated speed reducer according to claim 1, wherein the connecting portion is a connecting member integrally connected to the carrier. The rotation shaft of the motor and the input shaft of the speed reduction mechanism are arranged on the same axis,
The rotating shaft has a rotor having a hole,
The deceleration mechanism is
A first sun gear and a second sun gear arranged coaxially with the input shaft;
A first planetary gear meshing with the first sun gear;
A plurality of planetary gear sets having a second planetary gear that rotates integrally with the first planetary gear and meshes with the second sun gear;
A carrier that rotatably supports the plurality of planetary gear sets,
A motor-integrated speed reducer in which a connecting portion extending from the carrier is inserted and connected to a hole in the rotor, and the rotating shaft and the input shaft are arranged coaxially.