JP2017175835A - Commutator and motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a commutator capable of shortening a riser, while ensuring circularity of a conductive section and rigidity of the commutator body.SOLUTION: A commutator 30 includes a cylindrical commutator body 31 having insulation quality and extrapolated to the main shaft, multiple segments 33 arranged side by side in the circumferential direction so as to cover the outer peripheral surface of the commutator body 31, and having conductivity, and a riser 35 extending from the axial end of the main shaft in the segment 33, and capable of being connected with a winding W. The riser 35 includes a locking part 36 provided to be able to lock the winding W, and a non-locking part 37 arranged on the side of the locking part 36 in the circumferential direction, and conducting with the locking part 36.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a commutator and a motor.

  The commutator included in the motor with a DC brush is provided with a plurality of conductive portions on which the brush slides and a riser to which the winding (leader line) of the armature coil is connected. The riser is formed by extending from the conductive portion and bending the distal end portion toward the proximal end side. Thereby, a riser can pinch | interpose and wind a coil | winding (for example, refer patent document 1-patent document 3).

By the way, the riser and the winding are connected by fusing (heat caulking). When fusing, a pair of electrodes for welding are pressed against the riser and current is supplied between the pair of electrodes, so that the riser is softened by Joule heat and the riser and the winding are welded.
For example, in the configuration described in Patent Document 1 below, the conductive portion of the commutator and the riser are provided adjacent to each other. For this reason, it is necessary to press one electrode against the conductive portion during fusing. Therefore, not only the riser but also the conductive part generates heat and is softened, which may reduce the roundness of the conductive part.

  Further, in the configuration described in Patent Document 2 below, the riser protrudes from the conductive portion toward the outside in the radial direction. Therefore, at the time of fusing, the pair of electrodes can be pressed against the riser so that the riser is sandwiched from both sides in the axial direction by the pair of electrodes. Thereby, since fusing can be performed without pressing the electrode against the conductive portion, it is possible to prevent the roundness of the conductive portion from being lowered. However, in such a configuration, a space for arranging a pair of electrodes during fusing is required on both sides in the axial direction with respect to the riser. For example, it is necessary to form a through hole in which an electrode is arranged at a position overlapping with the riser of the armature core or the commutator body in the axial direction. For this reason, there exists a possibility that the intensity | strength of an armature core or a commutator main body may fall.

  In the configuration described in Patent Document 3 below, the riser has a locking portion bent in a U-shape that is locked by pinching the winding at the distal end portion, and straighter to the proximal end side than the locking portion. It has an extending part. This straight extending portion is used as a location where one of the pair of electrodes is pressed. This makes it possible to press the pair of electrodes against the distal end portion and the proximal end portion of the riser from one side in the axial direction during fusing. Therefore, it is not necessary to provide a through-hole in the armature core or commutator body, and the strength of the armature core or commutator body can be prevented from decreasing.

JP 2013-27088 A JP 2008-29168 A JP2015-220866A

  However, the configuration described in Patent Document 3 is excellent in that the pair of electrodes can be pressed against the riser from one side in the axial direction, but a portion extending straightly is provided at the base end portion of the riser. Thus, the radial dimension of the riser becomes longer. Thereby, the winding space of the coil arrange | positioned radially outside rather than a riser may become narrow. Further, when the riser extends in the axial direction from the conductive portion, the axial dimension of the commutator increases, and the motor may increase in size. Therefore, in the technique disclosed in Patent Document 3, there is room for improvement in terms of shortening the length of the riser.

  Therefore, the present invention provides a commutator and a motor that can shorten the riser while ensuring the roundness of the conductive portion and the rigidity of the commutator body.

  The commutator of the present invention is a cylindrical commutator body having an insulating property that is extrapolated to the main shaft, and a plurality of conductive parts that are arranged side by side in the circumferential direction so as to cover the outer peripheral surface of the commutator body, A riser extending from an axial end of the main shaft of the conductive portion and provided with a winding connectable thereto, and the riser is provided with a locking portion capable of locking the winding; and A non-locking portion that is disposed on a side of the locking portion in the circumferential direction and is electrically connected to the locking portion.

  According to the present invention, the locking part and the non-locking part can be arranged in the circumferential direction. Thereby, a pair of electrodes used for fusing can be pressed against the locking portion and the non-locking portion arranged in the circumferential direction. For this reason, it becomes possible to make the length of a riser into the length corresponding to one electrode part. Therefore, in the commutator in which the conductive portions are arranged in a cylindrical shape, the riser can be shortened while ensuring the roundness of the conductive portions and the rigidity of the commutator body.

  In the commutator, it is preferable that the riser extends radially outward from the main shaft from the axial end of the conductive portion.

  According to the present invention, the radial dimension of the commutator can be reduced. Thereby, it is possible to provide a large winding space arranged radially outside the riser. Therefore, a commutator capable of forming a highly efficient motor is obtained.

  The commutator according to the present invention includes a disc-shaped commutator body having an insulating property that is extrapolated to a main shaft, and a plurality of electrically conductive fan-like conductors arranged in a circumferential direction so as to cover the main surface of the commutator body. And a riser that extends from the outer peripheral portion of the conductive portion and that can be connected to a winding, and the riser includes a locking portion that can lock the winding, and the locking And a non-locking portion that is disposed on a side of the portion in the circumferential direction and is electrically connected to the locking portion.

  According to the present invention, the locking part and the non-locking part can be arranged in the circumferential direction. Thereby, a pair of electrodes used for fusing can be pressed against the locking portion and the non-locking portion arranged in the circumferential direction. For this reason, it becomes possible to make the length of a riser into the length corresponding to one electrode part. Therefore, in the commutator in which the conductive portion is disposed on the main surface of the disc-shaped commutator body, the riser can be shortened while ensuring the roundness of the conductive portion and the rigidity of the commutator body.

  A motor according to the present invention includes the commutator and an armature core having a tooth around which the winding is wound.

  According to the present invention, since the commutator that can shorten the riser is provided, it is possible to provide a large winding space when the riser is configured to extend radially outward. Therefore, a highly efficient motor can be obtained. In the case where the riser is configured to extend in the axial direction, the size of the commutator in the axial direction is reduced, so that a small motor can be obtained.

  According to the present invention, the locking part and the non-locking part can be arranged in the circumferential direction. Thereby, a pair of electrodes used for fusing can be pressed against the locking portion and the non-locking portion arranged in the circumferential direction. For this reason, it becomes possible to make the length of a riser into the length corresponding to one electrode part. Therefore, in the commutator in which the conductive portions are arranged in a cylindrical shape, the riser can be shortened while ensuring the roundness of the conductive portions and the rigidity of the commutator body.

It is a perspective view of the electric motor with a reduction gear of a 1st embodiment. It is a top view of the armature of a 1st embodiment. It is sectional drawing in the III-III line of FIG. It is a figure explaining the formation method of the segment and riser of a 1st embodiment. It is a top view of the armature of 2nd Embodiment. It is sectional drawing in the VI-VI line of FIG.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[First Embodiment]
FIG. 1 is a perspective view of the electric motor with a speed reducer according to the first embodiment.
As shown in FIG. 1, the electric motor 1 with a speed reducer includes a flat electric motor unit 10 (motor) configured as a DC brush motor, and a rotational output of the electric motor unit 10 by decelerating the output from the output shaft 80. And a deceleration mechanism unit 70 for outputting. The motor axis L that is the rotation center of the electric motor unit 10 coincides with the rotation center of the output shaft 80.

  An electric motor 1 with a speed reducer includes a cylindrical yoke 2 that is provided coaxially with the motor axis L as an outer shell and is open at both ends, and a motor cover 3 that is coupled so as to close one end of the yoke 2 in the axial direction. And a reduction gear cover 4 coupled so as to close the other axial end of the yoke 2, and a columnar main shaft 5 penetrating through a central opening 4 a of the reduction gear cover 4. Almost all the mechanism elements are accommodated in the space surrounded by the yoke 2, the motor cover 3, and the speed reducer cover 4. The main shaft 5 is disposed coaxially with the motor axis L. One end of the main shaft 5 in the axial direction is fixed to the motor cover 3.

  A motor magnet (permanent magnet) (not shown) is arranged in a cylindrical shape on the inner peripheral surface of one end of the yoke 2. The motor magnet has six magnetic poles, N poles and S poles, formed on the inner peripheral surface, arranged alternately in the circumferential direction.

  An armature 20 (see FIGS. 2 and 3) that is rotatable around the motor axis L is disposed on the inner peripheral side of the motor magnet. On one side of the armature 20 in the axial direction, a power supply device (not shown) including a pair of brushes for supplying power to the armature 20 is disposed.

FIG. 2 is a plan view of the armature of the first embodiment. FIG. 3 is a cross-sectional view taken along line III-III in FIG.
As shown in FIGS. 2 and 3, the armature 20 that is a main element of the electric motor unit 10 includes an armature core 21, a pair of insulators 22 and 23, an armature coil 24, and a commutator 30. In the following description, the motor cover 3 side in the axial direction (that is, one side in the axial direction) is referred to as the upper side, and the opposite side (that is, the other side in the axial direction) is referred to as the lower side.

  The armature core 21 is configured by laminating a plurality of steel plates in the axial direction. The armature core 21 has a substantially annular core body 21a. In the core body 21a, the uppermost steel plate among the plurality of steel plates is formed to have an inner diameter larger than that of the other steel plates. Thereby, the recessed part 21c of the depth for one steel plate is formed in the upper surface of the core main body 21a. A circular center opening 21d is provided at the center of the core body 21a. On the inner peripheral surface of the center opening 21d, a plurality of locking projections 21e extending along the axial direction are provided in a diametrical direction. A plurality (four in this embodiment) of clutch insertion holes 21f are formed at equal intervals along the circumferential direction around the central opening 21d in the recess 21c. A clutch 29 connected to the speed reduction mechanism unit 70 is fitted inside the clutch insertion hole 21f. A circular insulating plate 25 made of an insulating material is placed on the bottom surface of the recess 21c. An opening corresponding to the center opening 21 d of the armature core 21 is formed at the center of the insulating plate 25.

  On the radially outer side of the core body 21a, teeth 21b that are substantially T-shaped in a plan view in the axial direction are radially formed at equal intervals in the circumferential direction. A winding W is wound around the tooth 21b to form an armature coil 24. The teeth 21b include a collar portion 21bt that is formed at the tip portion and extends along the circumferential direction. The teeth 21b are substantially T-shaped in the plan view in the axial direction by the flange 21bt. Further, between the adjacent teeth 21b, the same number of slots 21s as the teeth 21b are provided. In the present embodiment, the number of teeth 21b and slots 21s is nine.

  The insulator is divided into an upper insulator 22 and a lower insulator 23 each formed of an insulating resin. When the insulator is mounted on the armature core 21, the upper insulator 22 and the lower insulator 23 are almost the part of the outer portion in the radial direction from the recess 21 c excluding the outer peripheral surface of the tip of the teeth 21 b of the armature core 21. So as to cover the outer shape of the teeth 21b.

The upper insulator 22 and the lower insulator 23 have the same shape. Here, the shape of the upper insulator 22 will be briefly described, and the description of the lower insulator 23 will be omitted.
The upper surface 22a of the upper insulator 22 is a surface around which the winding W constituting the armature coil 24 is wound, and is formed as a flat surface throughout. In the center of the upper surface 22a, a circular central opening 22b that opens the recess 21c of the armature core 21 is provided.

  The commutator 30 is rotatably supported by the main shaft 5 (see FIG. 1). The commutator 30 includes a cylindrical commutator body 31 extrapolated to the main shaft 5 and a plurality (9 in this embodiment) of segments 33 (conductive) arranged side by side so as to cover the outer peripheral surface of the commutator body 31. Part) and a riser 35 extending from the lower end of each segment 33.

  The commutator body 31 is formed of an insulating resin material. The commutator body 31 is disposed coaxially with the motor axis L, and is press-fitted into the central opening 21d of the armature core 21 with the upper end protruding. The outer peripheral surface of the lower end portion of the commutator body 31 is formed with a locking groove 31 a into which the locking projection 21 e provided in the central opening 21 d of the armature core 21 enters, and relative rotation between the armature core 21 and the commutator body 31. Is impossible. The outer peripheral surface of the upper end portion of the commutator main body 31 is formed with a reduced diameter across a stepped surface facing upward, and an annular magnet sensor 38 is externally fitted. The magnet sensor 38 is used for detecting the number of rotations of the armature 20. A cylindrical slide bearing 39 formed of a metal material is press-fitted inside the commutator main body 31. The slide bearing 39 is externally attached to the main shaft 5 (see FIG. 1).

  The plurality of segments 33 are formed in an arc tube shape in which a brush (not shown) is in sliding contact with a metal material such as copper having conductivity. The segment 33 is disposed on the outer peripheral surface of the upper end portion of the commutator body 31 with the brush contact surface facing radially outward. The plurality of segments 33 are arranged in a cylindrical shape side by side at a constant pitch while being insulated from each other in the circumferential direction. The number of segments 33 is the same as the number of teeth 21b, and the segments 33 are arranged on the center line in the width direction of the teeth 21b.

  The riser 35 is a hooking portion that connects the lead wire (winding W) of the armature coil 24 that is formed of a metal material such as copper. The riser 35 is connected to the lower end portion of the segment 33 and is placed on the bottom surface of the recess 21 c of the armature core 21 with the insulating plate 25 interposed therebetween. Thereby, the short circuit with the riser 35 and the armature core 21 is prevented. The riser 35 includes a locking portion 36 provided so as to be able to lock the winding W, and a non-locking portion 37 that is disposed on the side of the locking portion 36 in the circumferential direction and is electrically connected to the locking portion 36. I have.

  The locking portion 36 extends radially outward from the circumferential central portion at the lower edge of the segment 33. In other words, the teeth 21b and the locking portions 36 are arranged such that the center line in the width direction of the teeth 21b and the center line in the width direction of the locking portions 36 are located on the same straight line along the radial direction. . The locking portion 36 is folded upward in a U-shape so that the distal end surface is opposed to the proximal end portion.

  The non-locking portion 37 extends along the upper surface of the insulating plate 25 from the radial intermediate portion of the locking portion 36 toward one side in the circumferential direction. The non-locking portion 37 is formed to have a length that does not contact the riser 35 adjacent to one side in the circumferential direction.

FIG. 4 is a diagram for explaining a method of forming the segment and the riser according to the first embodiment.
As shown in FIG. 4, the plurality of segments 33 and the riser 35 are formed by pressing the metal plate 60 first, so that the plurality of segments 33 and the riser 35 indicated by a two-dot chain line in the drawing are integrated. Form. At this time, since the non-locking portion 37 is formed between the adjacent locking portions 36, it is possible to effectively use a portion of the metal plate that would otherwise be discarded, and the amount of metal material used. Can be reduced.

  Next, the riser 35 is bent at a substantially right angle with respect to the segment 33, the locking portion 36 is bent in a U shape, and then the portion where the plurality of segments 33 are integrated is aligned with the outer peripheral surface of the commutator body 31. Bending into a cylindrical shape. Next, a plurality of segments 33 insulated from each other in the circumferential direction can be formed by cutting the segment 33 along the axial direction with respect to the metal piece.

  In the armature 20 described above, the winding W is fixed to the riser 35 of the commutator 30 by fusing. More specifically, as shown in FIG. 2 and FIG. 3, the fusing is performed by locking the main electrode 51 for fusing in a state where the lead wire of the winding W is locked to the locking portion 36 of the riser 35. Press against the part 36 from above to apply pressure. Further, the fusing sub-electrode 52 is pressed against the non-locking portion 37 from above. In this state, a current is supplied between the main electrode 51 and the sub electrode 52. As a result, the riser 35 generates heat and softens, and the locking portion 36 and the winding W are brought into close contact with each other and welded by the pressure applied by the main electrode 51.

  As described above, the electric motor unit 10 of the present embodiment includes the yoke 2, the motor magnet (not shown), and the armature 20. The electric motor unit 10 is configured as a so-called 6-pole 9-slot 9-segment concentrated winding DC motor having six magnetic poles of a motor magnet, nine slots 21s of the armature 20, and nine segments 33 of the commutator 30. ing.

  As shown in FIG. 1, the speed reduction mechanism unit 70 is disposed below (on the other side in the axial direction) the armature 20 inside the yoke 2. The speed reduction mechanism unit 70 is configured as a hypocycloid speed reduction device and is connected to the above-described clutch 29 (see FIG. 3), thereby rotating the output shaft 80 with the rotation of the armature 20. The output shaft 80 is formed in a cylindrical shape having a gear on the outer peripheral surface. The output shaft 80 is inserted through the central opening 4 a of the speed reducer cover 4 and is externally inserted into the main shaft 5. O-rings 6 and 7 are arranged between the output shaft 80 and the central opening 4a and the main shaft 5, respectively.

  Thus, according to the commutator 30 of this embodiment, the locking part 36 and the non-locking part 37 can be arranged in the circumferential direction. Thereby, the main electrode 51 and the sub electrode 52 used for fusing can be pressed against the locking portion 36 and the non-locking portion 37 arranged in the circumferential direction. Therefore, the length of the riser 35 can be set to a length corresponding to the main electrode 51 that presses against the locking portion 36. Therefore, the riser 35 can be shortened in the commutator 30 in which the segments 33 are arranged in a cylindrical shape.

  In addition, since the riser 35 includes the locking portion 36 and the non-locking portion 37 that press the main electrode 51 and the sub electrode 52 during fusing, heat transfer to the segment 33 during fusing can be suppressed. Thereby, it can prevent that the roundness of the brush contact surface of the segment 33 falls.

  Further, since the riser 35 extends radially outward from the lower end of the segment 33, the radial dimension of the commutator 30 can be reduced. Thereby, it is possible to provide a large winding space for the armature coil 24 disposed radially outside the riser 35. Therefore, the commutator 30 capable of forming the highly efficient electric motor unit 10 is obtained.

  Further, in the configuration in which the riser 35 extends radially outward from the lower end portion of the segment 33, the locking portion 36 and the non-locking portion 37 are arranged in the circumferential direction, so that the fuser 35 is not sandwiched between the pair of electrodes. Can be jinged. Thus, a space for disposing the main electrode 51 and the sub electrode 52 during fusing may be provided only on one side in the axial direction with respect to the riser 35 (upper side in the present embodiment). For example, electrodes are disposed on the armature core 21. There is no need to form through-holes. Therefore, it is possible to prevent the strength of the armature core 21 from being lowered and ensure the rigidity.

  And since the electric motor part 10 of this embodiment is provided with the commutator 30 which can shorten the riser 35, it becomes possible to provide the winding space of the armature coil 24 large. Therefore, the highly efficient electric motor unit 10 is obtained.

[Second Embodiment]
FIG. 5 is a plan view of the armature of the second embodiment. 6 is a cross-sectional view taken along line VI-VI in FIG.
In the first embodiment shown in FIGS. 2 and 3, the plurality of segments 33 are formed in an arc tube shape and are arranged in a cylindrical shape. On the other hand, the second embodiment shown in FIGS. 5 and 6 is different from the first embodiment in that a plurality of segments 133 are formed in a fan shape and arranged in an annular plate shape. In addition, about the structure similar to 1st Embodiment shown in FIGS. 1-3, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted.

  As shown in FIGS. 5 and 6, the armature 120 includes an armature core 121, upper and lower insulators 122 and 123, an armature coil 24, and a commutator 130.

  The armature core 121 is configured by laminating a plurality of steel plates having the same shape in the axial direction. The armature core 121 has a substantially annular core body 121a. A circular central opening 121d is provided at the center of the core body 121a. Around the center opening 121d in the core body 121a, a plurality (three in this embodiment) of insertion holes 121e are formed at equal intervals along the circumferential direction. A protrusion 131c of a commutator main body 131, which will be described later, is inserted into the insertion hole 121e. Teeth 121b having a substantially T shape in a plan view in the axial direction around which the winding W is wound are radially formed at equal intervals in the circumferential direction on the radially outer side of the core body 121a.

  The insulator is divided into an upper insulator 122 and a lower insulator 123 each formed of an insulating resin. When the insulator is mounted on the armature core 121, the upper insulator 122 and the lower insulator 123 are almost all of the portion radially outside the insertion hole 121e excluding the outer peripheral surface of the tip of the teeth 121b of the armature core 121. It is formed in accordance with the outer shape of the teeth 121b so that the portion can be covered.

  The commutator 130 is arranged in a circumferential manner so as to cover a disc-shaped commutator main body 131 that is extrapolated to the main shaft 5 (see FIG. 1) and a main surface (upper surface) facing the upper side of the commutator main body 131. In the present embodiment, nine segments 133 (conductive portions) and risers 135 extending from the outer periphery of each segment 133 are provided.

  The commutator main body 131 is formed of an insulating resin material, and is disposed coaxially with the motor axis L on a main surface (upper surface) facing the upper side of the core main body 121a. In the center of the commutator main body 131, a circular center opening 131a is provided. The central opening 131 a is formed coaxially with the motor axis L and has the same diameter as the central opening 121 d of the armature core 121. A cylindrical tube portion 131 b extending upward in the axial direction is provided upright on the inner peripheral portion of the commutator main body 131. The inner peripheral surface of the cylindrical portion 131b is flush with the inner peripheral surface of the commutator main body 131. An annular magnet sensor 138 is fitted on the cylindrical portion 131b.

  As shown in FIG. 6, on the main surface (lower surface) facing the lower side of the commutator main body 131, a plurality of protrusions 131c that enter the insertion holes 121e of the armature core 121 correspond to the insertion holes 121e (in this embodiment, 3) standing up. The protrusion 131 c is formed in a shape corresponding to the insertion hole 121 e, and the lower end protrudes below the armature core 121. A recess 131d is formed on the lower end surface of the protrusion 131c. A cylindrical slide bearing 39 made of a metal material is press-fitted inside the commutator main body 131. The slide bearing 39 is arranged from the inside of the commutator main body 131 to the central opening 121 d of the armature core 121. The slide bearing 39 is externally attached to the main shaft 5 (see FIG. 1).

  As shown in FIGS. 5 and 6, the plurality of segments 133 are formed in a fan shape in which a brush (not shown) is in sliding contact with a metal material such as copper having conductivity. The segment 133 is disposed on the upper surface of the commutator main body 131 with the planar brush contact surface facing upward in a state of being spaced from the magnet sensor 138. The plurality of segments 133 are arranged in an annular shape side by side at a constant pitch while being insulated from each other in the circumferential direction. The number of segments 133 is the same as the number of teeth 121b, and the segments 133 are arranged on the center line in the width direction of the teeth 121b.

  The riser 135 extends in a fan shape radially outward from the outer peripheral portion of each segment 133. The riser 135 includes a locking portion 136 that can lock the winding W, and a non-locking portion 137 that is disposed on both sides in the circumferential direction of the locking portion 136 and is electrically connected to the locking portion 136. I have.

The locking portion 136 extends along the radial direction from the central portion in the circumferential direction on the outer peripheral edge of the segment 133. The locking portion 136 is folded upward in a U-shape so that the distal end face is opposed to the proximal end portion.
The non-locking portion 137 extends along the upper surface of the commutator main body 131 toward both sides in the circumferential direction from a portion of the locking portion 136 that extends along the upper surface of the commutator main body 131. The non-locking portion 137 is continuous with the outer peripheral edge of the segment 133.

  Thus, according to the commutator 130 of this embodiment, the locking part 136 and the non-locking part 137 can be arranged in the circumferential direction. Thereby, the main electrode 51 and the sub electrode 52 used for fusing can be pressed against the locking portion 136 and the non-locking portion 137 arranged in the circumferential direction. For this reason, the length of the riser 135 can be made to correspond to the length of the main electrode 51 pressed against the locking portion 136. Therefore, the riser 135 can be shortened in the commutator 130 in which the segment 133 is disposed on the main surface of the disc-shaped commutator main body 131.

  In addition, in the configuration in which the riser 135 extends radially outward from the outer peripheral edge of the segment 133, the locking portion 136 and the non-locking portion 137 are arranged in the circumferential direction, so that the fuser is not sandwiched between the pair of electrodes. Can be jinged. Accordingly, a space for disposing the main electrode 51 and the sub electrode 52 during fusing may be provided only on one side in the axial direction with respect to the riser 135 (upper side in the present embodiment). For example, the electrodes are disposed on the commutator body 131. There is no need to form through-holes. Therefore, the strength of the commutator main body 131 can be prevented from decreasing and the rigidity can be ensured.

  And since the dimension of the axial direction of the commutator 130 becomes small by setting it as the structure provided with the commutator 130 in which the electric motor part 10 can shorten the riser 135 of this embodiment, it can be set as the small electric motor part 10. FIG.

The present invention is not limited to the above-described embodiment described with reference to the drawings, and various modifications can be considered within the technical scope thereof.
For example, in the first embodiment, the non-locking portion 37 is arranged on one side in the circumferential direction of the locking portion 36 in each riser 35, but is not limited to this, for example, in the riser 35 arranged in the circumferential direction, You may arrange | position so that the position of the non-locking part with respect to the locking part 36 may become alternate. Further, the non-locking part may extend from the locking part 36 toward both sides in the circumferential direction.

  Moreover, in the said 2nd Embodiment, although the non-locking part 137 continues with the outer periphery of the segment 133, it is not limited to this, The intermediate part of the radial direction of the locking part 136 is similar to 1st Embodiment. May extend from the outer periphery of the segment 133. Thereby, the heat transfer to the segment 133 at the time of fusing can be suppressed more effectively.

  In each of the above embodiments, the risers 35 and 135 extend radially outward from the segments 33 and 133. However, the present invention is not limited to this, and the riser may extend from the segments along the axial direction. .

  In addition, it is possible to appropriately replace the components in the above-described embodiments with known components without departing from the spirit of the present invention.

  DESCRIPTION OF SYMBOLS 5 ... Main shaft 10 ... Electric motor part (motor) 21, 121 ... Armature core 21b, 121b ... Teeth 30, 130 ... Commutator 31, 131 ... Commutator main body 33, 133 ... Segment (conductive part) 35, 135 ... Riser 36, 136 ... Locking part 37, 137 ... Non-locking part W ... Winding

Claims (4)

A cylindrical commutator body having insulating properties to be extrapolated to the main shaft;
A plurality of conductive portions arranged in a circumferential direction so as to cover the outer peripheral surface of the commutator body, and having conductivity,
A riser that extends from an axial end of the main shaft in the conductive portion and is provided so that a winding can be connected;
With
The riser is
A locking portion provided to lock the winding;
A non-locking portion disposed on the side of the locking portion in the circumferential direction and electrically connected to the locking portion;
Comprising
A commutator characterized by that. The riser extends radially outward from the main shaft from the axial end of the conductive portion,
The commutator according to claim 1. A disc-shaped commutator body having insulating properties to be extrapolated to the main shaft;
A plurality of fan-shaped conductive portions arranged in a circumferential direction so as to cover the main surface of the commutator body, and having conductivity,
A riser that extends from the outer periphery of the conductive portion and is provided so that a winding can be connected;
With
The riser is
A locking portion provided to lock the winding;
A non-locking portion disposed on the side of the locking portion in the circumferential direction and electrically connected to the locking portion;
Comprising
A commutator characterized by that. The commutator according to any one of claims 1 to 3,
An armature core having teeth around which the winding is wound;
A motor comprising:

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