JP5671815B2 - DC motor armature - Google Patents

Description

  The present invention relates to an armature for a DC motor.

  As shown in FIG. 9, as a DC motor equipped with a conventional armature, a motor housing 102 including a yoke 102a and an end frame 102b respectively provided with bearings 105 and 106, an inner peripheral surface of the yoke 102a, etc. A DC motor 101 is disclosed that includes a plurality of magnets 104 arranged in minutes, and an armature 103 into which a rotating shaft 107 that is rotatably supported by bearings 105 and 106 is inserted.

  The armature 103 includes a rotating shaft 107, an armature core 108 inserted into the rotating shaft 107, a main winding portion 109, a short-circuit wire 116 (FIG. 12), and a commutator 110. FIG. 10 is a view of the armature 103 viewed from the A direction. As shown in FIG. 10, the armature core 108 has twelve teeth 111 extending radially. Between the teeth 111 adjacent in the circumferential direction, the same number of slots 112 as the number of the teeth 111 are formed. In the slot 112, a main winding portion 109 wound around a plurality of teeth 111 is disposed. Here, a tooth number is assigned as “1” to “12” in the clockwise direction for each tooth 111.

  As shown in FIG. 9, the commutator 110 is fixed to the rotating shaft 107 and rotates integrally with the rotating shaft 107, and the anode side power supply brush and the cathode side power supply brush (not shown) are slidably contacted. Segments 113 are provided at equal intervals in the circumferential direction. As shown in FIG. 10, each segment 113 has a connection claw 114 to which the short-circuit wire 116 (FIG. 11) and the main winding portion 109 are connected. Here, the segment numbers are assigned as “1” to “12” in the clockwise direction for each segment 113, and the same number as that of the segment 113 is also assigned to the connection claw 114 (FIGS. 10 to 12).

  As shown in FIG. 11, the short-circuit wire 116 is wound around the end surface 108 a (FIG. 9) of the armature core 108 on the side where each segment 113 (FIG. 9) exists, and is wound around the rotating shaft 107 (neck winding). It is connected to two connection claws 114 arranged with an angle (180 °). Specifically, the connection claws 114 having the numbers “1” and “7” are sequentially connected by the short-circuit wires 116 a, and the connection claws 114 having the numbers “6” and “12” are the short-circuit wires 116 b and the numbers “11”. And the connection claws 114 of the number “5” are the short-circuit wires 116c, the connection claws 114 of the numbers “4” and “10” are the short-circuit wires 116d, and the connection claws 114 of the numbers “9” and “3” are The short-circuit line 116e and the connection claws 114 having the numbers “2” and “8” are connected by the short-circuit line 116f.

  As shown in FIGS. 11 and 12, after the winding of the main winding portion 109 described below, the unnecessary lines 119 between the numbers “2” and “3” of the connection claws 114 and the numbers “4” are displayed. Unnecessary line 119 between number “5”, unnecessary line 119 between number “6” and number “7”, unnecessary line 119 between number “9” and number “10”, and between number “11” and number “12” The unnecessary line 119 is cut off. And the termination | terminus part g of the short circuit wire 116f connected to the connection nail | claw 114 of the number "8" is set as the winding start of the main winding part 109 (FIG. 10).

  As shown in FIG. 10, the main winding portion 109 has a connecting wire 117 connected to two segments 113 (connecting claws 114) and a winding wound around three teeth 111 with the connecting wire 117 as both ends. Line portion 118. The main winding portion 109 is formed continuously from the terminal end g on one end side of the short-circuit wire 116f (FIG. 12), and starts from the segment 113 (connection claw 114) of number “8” as one start position. A line is formed by winding each tooth 111 sequentially. Specifically, the short-circuit line 116 f connected to the segment 113 (connection claw 114) with the number “8” becomes a crossover line 117 a from there. Then, the crossover wire 117a is connected to the segment 113 (connection claw 114) of the number “3” from the crossover wire 117a through the winding part 118a. Then, the next main winding portion 109 (winding portion 118b, connecting wire 117b), main winding portion 109 (winding portion 118c, connecting wire 117c), main winding portion 109 (winding portion 118d, connecting wire 117d). ) Are sequentially formed. In the main winding portion 109, the connecting wire 117 is wired on the end face side where the segment 113 of the armature core 108 is provided, and is wound over the three teeth 111, and is wound in a so-called split winding method. (See Patent Document 1).

  Further, a DC motor having 16 teeth, a main winding portion wound over three of the teeth, and an armature having 16 segments is disclosed. The connecting claws of the two segments to which the connecting wires at both ends of the main winding portion are connected form an angle of 90 ° with each other, and the main winding portion is divided like the armature 103 of Reference 1. . Further, the four power supply brushes slide in contact with the segments, the first power supply brush and the third power supply brush facing each other are electrically connected, and the second power supply brush and the fourth power supply brush facing each other are electrically connected. In addition, a short-circuit line is not provided on the segment facing 180 ° (see Patent Document 2).

JP 2005-341854 A JP 2008-236941 A

  However, according to Patent Document 1, the main winding portion 109 has two connecting claws 114 that form an angle of 210 ° when the connecting wire 117 of the main winding portion 109 is drawn on the end face 108a side of the armature core 108. And is wound by a split winding method across the plurality of teeth 111. For this reason, a gap U (FIG. 9) is required between the connection claw 114 of the commutator 110 and the end portion (coil end surface) of the winding portion 118 of the armature 103 so that the connecting wire 117 can be locked to the connection claw 114. is there. That is, the gap U is set so that the connection claw 114 is located outside the coil end surface 118 x of the winding part 118. If the connection claw 114 is inserted into the inner diameter side of the winding portion 118 and the gap U is reduced, the connection of the connecting wire 117 to the connection claw 114 becomes impossible.

  Further, the short-circuit wire 116 has two connection lines arranged on the end face side where each segment 113 of the armature core 108 is located and wound around the rotary shaft 107, so-called neck winding, and having a predetermined angle (180 °). It is connected to the claw 114. In order to enable connection of the short-circuit line 116 to the connection claw 114, the gap U is necessary as in the case of the main winding portion 109. As described above, since the main winding portion 109 and the short-circuit wire 116 can be connected to the connection claw 114, the distance between the end surface 108a of the armature core 108 and the commutator 110 cannot be shortened, and the DC motor 101 is long in the axial direction. There is a problem.

  Further, as described above, the short-circuit wire 116 is neck-wound and the short-circuit wire 116 is connected to the two connection claws 114 that form an angle of 180 °. For this reason, the short-circuit wire 116 may come into contact with the rotating shaft 107 or the connection claw 114 that is not connected, causing a short-circuit failure. Further, the main winding portion 109 is wound by a split winding method, and the connecting wire 117 is connected to the two connecting claws 114 having an angle of 210 °, so that the connecting wire 117 contacts the connecting claws 114 to which the connecting wire 117 is not connected. May cause a short-circuit failure. As a result, the armature 103 may cause a short circuit failure.

  Further, after the winding of the main winding portion 109 is completed, the unnecessary wire 119 of the short-circuit wire 116 must be cut, and the cost of the armature core 108 is increased by the cutting process.

  Further, according to Patent Document 2, the angle formed by the connecting claws of the two segments to which the connecting wires at both ends of the main winding portion are connected is 90 °, but the commutator is the same as the armature 108 of Document 1. When the gap between the armature core and the armature core becomes small, it becomes impossible to connect the crossover wire to the connection claw. For this reason, there is a problem that the DC motor cannot be shortened in the axial direction.

  In addition, when no connection claw is provided, the number of brushes is twice that of the armature core, which increases the cost of the armature core.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a low-cost DC motor armature that is small in size in the axial direction and that can suppress a short-circuit failure.

In order to solve the above-mentioned problems, an invention according to claim 1 is directed to a rotating shaft, an armature core mounted on the rotating shaft and having twelve teeth, mounted on the rotating shaft, and an anode-side power supply brush and a cathode. The side power supply brush is slidably contacted, and a commutator having the same number of segments as the teeth and a plurality of coils wound around one or more teeth and connected to respective hooks provided in two predetermined segments An armature including a coil portion and a short-circuit portion connected to a hook of a segment facing each other in the radial direction via a rotating shaft, the coil portion or the short-circuit portion connected to the hook and the hook; Is located on the inner side of the inner circumference of the coil portion protruding from one side surface of the armature core of the coil portion and on the one side surface side of the end surface of the coil portion protruding from one side surface of the coil portion. It passes through a slot formed between adjacent teeth and is laid along one side and the other side opposite to the one side and is engulfed by one or more teeth.

In the invention according to claim 1 , the teeth are provided with 12 first teeth to 12th teeth sequentially, and the first segment to the 12th segment are provided corresponding to the first teeth to the 12th teeth. The short-circuit part is wound around four teeth excluding the teeth at both ends sandwiched between the circumferential angles formed by the two segments to which both ends of the short-circuit part are connected, and both ends of the short-circuit part connected to each segment Introduced into each slot formed outside both ends of the four teeth along one side from the side, passed through the slot, along each other side of the teeth at both ends, and formed inside the teeth at both ends Passing through each slot toward one side, wiring is performed along one side of the two teeth sandwiched between the teeth at both ends.

In the invention according to claim 2 , the segment disposed between the circumferential angles formed by the first tooth and the second tooth is defined as the first segment, and the segment is adjacent to the first tooth to the twelfth tooth. The first segment to the twelfth segment are sequentially arranged between the circumferential angles formed by the matching teeth, and the coil portion is wound in the same direction across the three teeth, and both ends of the coil portion are Twelve short-circuit portions are connected to two segments provided between the circumferential angles formed by the teeth on both sides around which the coil portion is wound. A short-circuit portion is provided, the first short-circuit portion and the seventh short-circuit portion are connected to the second segment and the eighth segment, and the second short-circuit portion and the eighth short-circuit portion are connected to the ninth segment and the third segment. The third short-circuit portion and 9 short circuit part is connected to the 4th segment and 10th segment, 4th short circuit part and 10th short circuit part are connected to 11th segment and 5th segment, 5th short circuit part and 11th short circuit part, Are connected to the sixth segment and the twelfth segment, and the sixth short circuit portion and the twelfth short circuit portion are connected to the first segment and the seventh segment.

According to a third aspect of the present invention, the coil portion and the short-circuit portion are formed by alternately winding and winding a continuous conducting wire in a single stroke.

  According to the first aspect of the present invention, the contact between the hook and the coil portion or the short-circuit portion connected to the hook is on the inner side of the inner periphery of the coil portion protruding from one side surface of the armature core and from one side surface of the coil portion. It exists in the position of one side surface from the protruding coil part end surface. Therefore, since the distance between the commutator provided with the hook and one side surface of the armature core is shortened and the axial length of the armature of the present invention can be shortened, a small DC motor armature flat in the axial direction is provided. it can.

  In addition, the short-circuit portion passes through a slot formed between adjacent teeth, and extends along one side surface of the armature core and the other side surface opposite to the one side surface, and one or more teeth. To be engaged. Therefore, the armature of the present invention can prevent the short-circuit portion from floating in the air, can avoid contact with the segment of the short-circuit portion and the rotating shaft, and can suppress a short-circuit failure due to contact of the short-circuit portion.

  Furthermore, since the armature of the present invention is engaged with the teeth while reciprocating one side and the other side in the axial direction by the engagement of the short-circuit portion, the tension of the short-circuit portion is appropriately relaxed and the short-circuit is performed. The disconnection of the part can be suppressed.

  Further, the armature of the present invention is provided with a short-circuit portion that short-circuits the segments that are opposed to each other in the radial direction via the rotating shaft, so that the opposed segments can be at the same potential, and a pair of the anode-side brush and the cathode-side brush is connected. What is necessary is just to slidably contact the segment of a commutator. This newly eliminates the need for a pair of brushes on the anode side and cathode side. As a result, the cost of the armature is reduced, and a low-cost DC motor armature can be provided.

In the invention described in claim 1 , twelve teeth are provided. Then, both end sides of the short-circuit portion connected to the hooks of the segments that are opposed to each other in the radial direction via the rotating shaft pass through the slot and run along one side surface of the tooth and the other side surface of the tooth. And the other side are reciprocated by four teeth while reciprocating in the axial direction. Therefore, the armature of the present invention can prevent the short-circuit portion from floating in the air, can avoid contact with the segment of the short-circuit portion and the rotating shaft, and can suppress a short-circuit failure due to contact of the short-circuit portion. Furthermore, since the armature of the present invention is engaged with the teeth while reciprocating one side and the other side in the axial direction by the engagement of the short-circuit portion, the tension of the short-circuit portion is appropriately relaxed and the short-circuit is performed. The disconnection of the part can be suppressed.

In the invention according to claim 2 , twelve first teeth to twelfth teeth are sequentially provided on the circumference. A coil part straddles three teeth, and a conducting wire is wound, and 12 1st coil parts-12th coil part are formed. For example, the first coil portion is wound across the first tooth, the second tooth, and the third tooth, and both ends of the first coil portion are hooked on the first segment in the vicinity of the first tooth, respectively, It is connected to the hook of the second segment adjacent to the first segment and in the vicinity of the second tooth. Since the second coil portion to the twelfth coil portion are also formed in the same manner as the first coil portion, the hooks of the segments to which both ends of the coil portion are respectively connected are adjacent to each other and in the vicinity of the wound teeth. . Therefore, the lead wire portion connected to the hook from the winding portion of the coil portion straddling the three teeth can avoid contact with the hook (or segment) and the rotating shaft, and short circuit failure due to contact of the coil portion can be avoided. Can be suppressed.

  In addition, the armature of the present invention can avoid contact with the segment of the short circuit section and the rotating shaft by zigzag wiring that passes through the slot, passes along one side surface and the other side surface, and reciprocates in the axial direction. Moreover, while being able to suppress the short circuit failure by contact, the tension | tensile_strength of a short circuit part is relieve | moderated appropriately and the disconnection of a short circuit part can be suppressed.

In the invention according to claim 3 , the coil portion and the short-circuit portion are formed by alternately winding and winding a continuous conducting wire in a single stroke. Therefore, each work of winding and locking to the hooks for forming each coil part, and winding of each short-circuit part and locking to the hook can be performed successively in succession, thereby shortening each work time. This can reduce the cost of the armature of the present invention.

  Moreover, since each short circuit part of this invention does not have an unnecessary line and does not need to cut | disconnect an unnecessary line, the cost of the armature core 3 is reduced for the cutting process. Thus, a low-cost DC motor armature can be provided.

It is a perspective view explaining the wiring of the short circuit part of the armature which concerns on the Example of this invention. It is a top view of FIG. It is explanatory drawing of the 1st coil part-the 6th coil part which developed the armature shown in Drawing 2 in the plane, and the 1st short circuit part-the 6th short circuit part. It is explanatory drawing of the 7th coil part-the 12th coil part which developed the armature shown in Drawing 2 in the plane, and the 7th short circuit part-the 12th short circuit part. FIG. 3 is an explanatory diagram of winding of a coil portion C and winding of a short-circuit portion D in which the armature shown in FIG. FIG. 4 is a development view showing wiring of the lead wire 11 to the electronic machine core. It is the expanded view which showed the wiring to the electronic machine core of the conducting wire 12. FIG. FIG. 2 is a cross-sectional view around a commutator of the electronic machine of FIG. 1. It is explanatory drawing of the armature of the DC motor of the prior art which concerns on this invention. FIG. 10 is a view of the armature of FIG. It is explanatory drawing of the wiring method of the short circuit wire of the armature of FIG. FIG. 10 is a wiring diagram of a short circuit line of the armature of FIG. 9.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a perspective view illustrating wiring of a short-circuit portion of the armature according to the present embodiment. FIG. 2 is a plan view of FIG. The armature 1 is an armature of a DC motor (not shown), and a plurality of magnets fixed to a motor housing (not shown) are provided on the outer peripheral side. The armature 1 includes a rotating shaft 2, an armature core 3 press-fitted into the rotating shaft 2, a commutator 4 press-fitted into the rotating shaft 2, a coil portion C (FIGS. 3 and 4), and a short-circuit portion D ( 3 and 4). 1 and 2, only a part of the coil part C and the short circuit part D (coil part C1 and short circuit part D1) is shown.

  The armature core 3 includes a plurality of cores 7 stacked in the axial direction, and insulators 8 and 9 made of insulating material that sandwich both end faces of the stacked cores 7. The core 7 has a plurality of (in this embodiment, 12) teeth portions 7a that radiate equally on the circumference, and a hole 7b (FIG. 2) into which the rotary shaft 2 is inserted at the center portion. The insulators 8 and 9 are provided with a tooth portion having substantially the same shape as the tooth portion 7a, and sandwich the radial side surface of the tooth portion 7a of the laminated core 7. Hereinafter, the description will be made assuming that the number of the tooth portions 7a is twelve. Twelve teeth T, that is, a first tooth T1 to a twelfth tooth T12 (FIG. 2) are formed by the tooth portions 7a of the laminated core 7 and the tooth portions of the insulators 8 and 9.

  As shown in FIGS. 1 and 2, the commutator 4 is inserted into the rotating shaft 2, and the same number of segments S as the number of the teeth portions 7a are equally arranged on the outer peripheral surface. The segment S is provided between the circumferential angles formed by two adjacent teeth T. Then, the segment S provided between the circumferential angles formed by the first teeth T1 and the second teeth T2 is defined as the first segment S1, and the first segments S1 to S12 are sequentially formed by the first teeth T1 to the twelfth teeth T12. A segment S12 is provided. Further, the anode side brush 13 and the cathode side brush 14 (FIGS. 3 to 7) are in sliding contact with the outer peripheral surface of the segment S.

  The segment S includes a first hook F1 corresponding to the first segment S1 to the twelfth segment S12 corresponding to the hook F to which the beginning and end of winding of the coil portion C and both ends of the short-circuit portion D are locked. A twelfth hook F12 is provided. When the winding of the coil portion C and locking to the hook F, and the engagement of the short-circuit portion D and locking to the hook F are finished, the hook F is bent, and the winding of the coil portion C is started. The end of the winding, the end of the short-circuit portion D, and the hook F are fusing welded.

  As will be described in detail later, the coil portion C is wound with a predetermined number of turns across the three teeth T, and the winding start and end of the coil portion C are respectively hooks F of two predetermined adjacent segments S. Connected to. As a result, the armature 1 is provided with twelve coil portions C, that is, the first coil portion C1 to the twelfth coil portion C12. Further, the short-circuit portion D is connected to the hook F so as to short-circuit the two segments S that are opposed to each other in the radial direction via the rotating shaft 2 (located at a position shifted by 180 ° in the circumferential angle), and the armature 1 is wired with 12 short-circuit portions D, that is, a first short-circuit portion D1 to a twelfth short-circuit portion D12. Also, twelve slots L, that is, the first slot L1 to the first slot L12 are formed by two adjacent teeth T. Although details will be described later, the number of short-circuit portions D may be six.

  3 expands the tooth T and the segment S (or hook F) of the armature core 3 shown in FIG. 2 on a plane, and the first coil portion C1 to the sixth coil portion C6 and the first short-circuit portion D1 to sixth. It is explanatory drawing which shows the wiring of the short circuit part D6, the coil part C is shown with a thick continuous line, and the short circuit part D is shown with a continuous line. 3 and FIGS. 4 to 7 to be described later, numbers 1 to 12 in the rectangle are the first tooth T1 to the twelfth tooth T12 and the first segment S1 to the twelfth segment S12 (or the first hooks F1 to F1) of FIG. 12th hook F12) is shown.

  As shown in FIG. 3, the first coil portion C1 is wound around the first tooth T1, the second tooth T2, and the third tooth T3, and one end of the first coil portion C1 is connected to the first segment S1, The other end is connected to the second segment S2.

  The second coil portion C2 is wound around the eighth tooth T1, the ninth tooth T9, and the tenth tooth T10, one end of the second coil portion C2 is connected to the eighth segment S8, and the other end is the ninth segment S9. Connected to.

  The third coil portion C3 is wound around the third tooth T3, the fourth tooth T4, and the fifth tooth T5, one end of the third coil portion C3 is connected to the third segment S3, and the other end is the fourth segment S4. Connected to.

  The fourth coil portion C4 is wound around the tenth tooth T10, the eleventh tooth T11, and the twelfth tooth T12, one end of the fourth coil portion C4 is connected to the tenth segment S10, and the other end is the eleventh segment S11. Connected to.

  The fifth coil portion C5 straddles the fifth tooth T5, the sixth tooth T6, and the seventh tooth T7, one end of the fifth coil portion C5 is connected to the fifth segment S5, and the other end is connected to the sixth segment S6. The

  The sixth coil portion C6 is wound around the twelfth tooth T12, the first tooth T1, and the second tooth T2, and one end of the sixth coil portion C6 is connected to the twelfth segment S12 and the other end is the first segment S1. Connected to.

  The first short-circuit portion D1 is connected to the second segment S2 and the eighth segment S8 that faces the second segment S2 in the radial direction via the rotating shaft 2. That is, the second segment S2 is at a position different from the eighth segment S8 by 180 ° in circumferential angle. Similarly, the second short circuit portion D2 is connected to the ninth segment S9 and the third segment S3, the third short circuit portion D3 is connected to the fourth segment S4 and the tenth segment S10, and the fourth short circuit portion D4 is connected to the eleventh segment S11. The fifth short circuit portion D5 is connected to the sixth segment S6 and the twelfth segment S12, and the sixth short circuit portion D6 is connected to the first segment S1 and the seventh segment S7, respectively. In FIG. 3, the left line end m is connected to the right line end m, the left line end n is connected to the right line end n, and the left line end o is connected to the right line end o. .

  4 expands the teeth T and the segments S (or hooks F) of the armature core 3 shown in FIG. 2 on a plane, and wire the coil portions C7 to C12 and the seventh short circuit portion D7 to the twelfth short circuit portion D12. The coil portion C is indicated by a thick solid line, and the short-circuit portion D is indicated by a solid line.

  The seventh coil portion C7 is wound around the seventh tooth T7, the eighth tooth T8, and the ninth tooth T9, one end of the seventh coil portion C7 is connected to the seventh segment S7, and the other end is the eighth segment S8. Connected to.

  The eighth coil portion C8 is wound around the second tooth T2, the third tooth T3, and the fourth tooth T4, one end of the eighth coil portion C8 is connected to the second segment S2, and the other end is the third segment S3. Connected to.

  The ninth coil portion C9 is wound over the ninth tooth T9, the tenth tooth T10, and the eleventh tooth T11, one end of the ninth coil portion C9 is connected to the ninth segment S9, and the other end is the tenth segment S10. Connected to.

  The tenth coil portion C10 is wound around the fourth tooth T4, the fifth tooth T5, and the sixth tooth T6, one end of the tenth coil portion C10 is connected to the fourth segment T4, and the other end is the fifth segment T5. Connected to.

  The eleventh coil portion C11 is wound around the eleventh tooth T11, the twelfth tooth T12, and the first tooth T1, and one end of the eleventh coil portion C11 is connected to the eleventh segment S11, and the other end is the twelfth segment S12. Connected to.

  The twelfth coil portion C12 is wound over the sixth tooth T6, the seventh tooth T7, and the eighth tooth T8, one end of the twelfth coil portion C12 is connected to the sixth segment S6, and the other end is the seventh segment S7. Connected to.

  The seventh short circuit part D7 is connected to the eighth segment S8 and the second segment S2 facing the second segment S8. Similarly, the eighth short circuit portion D8 is connected to the third segment S3 and the ninth segment S9, the ninth short circuit portion D9 is connected to the tenth segment S10 and the fourth segment S4, and the tenth short circuit portion D10 is connected to the fifth segment S5. The eleventh short circuit portion D11 is connected to the eleventh segment S11, the twelfth segment S12 and the sixth segment S6, and the twelfth short circuit portion D12 is connected to the seventh segment S7 and the first segment S1, respectively. In FIG. 4, the left line end p is connected to the right line end p, the left line end q is connected to the right line end q, and the left line end r is connected to the right line end r. .

  5 expands the tooth T and the segment S (or hook F) of the armature core 3 shown in FIG. 2 on a plane, and turns the coil portion C (C1, C2, C3) and the short-circuit portion D (D1). , D2, D3) is an explanatory view showing the routing (wiring routing). In FIG. 5, the coil portion C is indicated by a thick solid line, and the short-circuit portion D is indicated by a thick broken line. FIG. 6 is a development view showing winding of the coil portion C around the electronic machine core 3 of the conducting wire 11 and winding of the short-circuit portion D, where the coil portion C is shown by a thick solid line and the short-circuit portion D is shown by a solid line. . In FIG. 5, the upper side and the lower side of the rectangle of the tooth T correspond to the one side surface 3a of the electronic machine core 3 and the other side surface 3b opposite to the one side surface 3a. Further, a slot L is shown between the teeth T indicated by the rectangle, and a first slot L1 is provided between the first teeth T1 and the second teeth T2, and the slot numbers are sequentially increased as proceeding to the right in FIG. The right side of the 12 teeth T12 (the left side of the first teeth T1) indicates the 12th slot L12. Although not shown in FIGS. 3, 4, 6, and 7, the positional relationship between the side surface 3a side and the other side surface 3b side of the electronic machine core 3 and the slot L is shown in FIG. The same as the one side 3a side and the other side 3b side of the machine core 3 and the slot L.

  As shown in FIG. 6, the first coil part C1, the first short circuit part D1, the second coil part C2, the second short circuit part D2, the third coil part C3, the third short circuit part D3, 4 coil part C4, 4th short circuit part D4, 5th coil part C5, 5th short circuit part D5, 6th coil part C6, and 6th short circuit part D6 are one continuous conducting wire 11 in order. is there. The winding of the coil portion C in the armature core 3 of the conducting wire 11 and the engagement of the short-circuit portion D are performed in a single stroke as follows.

  That is, as shown in FIG. 5, the winding start of one end of the coil portion C1 is locked to the first hook F1 of the first segment S1, and the first tooth T1, the second tooth T2, and the third tooth T3 are connected. Winding is performed a predetermined number of times across, and the end of winding is locked to the second hook F2 of the second segment S2, and the first coil portion C1 is formed. As shown in FIGS. 1, 2, and 5, the conducting wire 11 locked to the second hook F <b> 2 continues to be the first short-circuit portion D <b> 1, along the side surface 3 a of the armature core 3, and the third slot. It is introduced to L3 and passes through the third slot L3. The first short-circuit portion D1 that has passed passes through the other side surface 3b of the fourth tooth T4, the fourth slot L4, the one side surface 3a of the fifth and sixth teeth T5, T6, the sixth slot L6, and the seventh tooth. It passes while reciprocating in the axial direction on the other side surface 3b of T7. Then, the first short circuit portion D1 that has passed over the other side surface 3b of the seventh tooth T7 passes through the seventh slot L7 and is drawn upward, and along the one side surface 3a, the eighth hook F8 of the eighth segment S8. It is locked to.

  The conducting wire 11 locked to the eighth hook F8 becomes the second coil portion C2 from the first short circuit portion D1 and straddles the eighth tooth T8, the ninth tooth T9, and the tenth tooth T10, and is wound a predetermined number of times. The second coil portion C2 is formed by being rotated and locked to the ninth hook F9 of the ninth segment S9. The conducting wire 11 at the end of winding of the second coil portion C2 locked to the ninth hook F9 then becomes the second short-circuit portion D2. Similarly to the first short circuit part D1, the second short circuit part D2 passes through the slots L10, L11, L1, L2 between the one side surface 3a and the other side surface 3b of the armature core 3, and the one side surface 3a. It is engaged with the other side surface 3b while reciprocating in the axial direction (hereinafter referred to as zigzag wiring), and is engaged with the third segment S3. From there, as shown in FIG. 6, the winding of the third coil portion C3, the zigzag wiring of the third short circuit portion D3, the winding of the fourth coil portion C4, and the fourth short circuit portion D4 are sequentially performed. Zigzag wiring, winding of the fifth coil part C5, and zigzag wiring of the sixth short circuit part D6 are performed. And the termination | terminus part of the 6th short circuit part D6 is latched by the 7th hook F7 of 7th segment S7, and the wiring of the conducting wire 11 of a one-stroke shape is complete | finished.

  Similar to the conductive wire 11, the seventh coil part C7, the seventh short circuit part D7, the eighth coil part C8, the eighth short circuit part D8, the ninth coil part C9, the ninth short circuit part D9, and the tenth The coil portion C10, the tenth short-circuit portion D10, the eleventh coil portion C11, the eleventh short-circuit portion D11, the twelfth coil portion C12, and the twelfth short-circuit portion D12 are one continuous conductive wire 12. is there.

  FIG. 7 is a development view showing winding of the coil portion C around the electronic machine core 3 of the conducting wire 12 and engagement of the short-circuit portion D, where the coil portion C is indicated by a thick solid line and the short-circuit portion D is indicated by a solid line. . As shown in FIG. 7, the winding start of the seventh il C7 is locked to the seventh tooth T7, and the winding of the seventh coil portion C7 and the winding of the seventh short-circuit portion D7 are sequentially performed in the same manner as the conducting wire 11. , Winding of the eighth coil portion C8, winding of the eighth short circuit portion D8, winding of the ninth coil portion C9, winding of the ninth short circuit portion D9, and winding of the tenth coil portion C10 , Winding of the tenth short circuit portion D10, winding of the eleventh coil portion C11, winding of the eleventh short circuit portion D11, winding of the twelfth coil portion C12, and winding of the twelfth short circuit portion D12 Are made sequentially. And the termination | terminus part of the 12th short circuit part D12 is latched by the 1st hook F1 of 1st segment S1, and the wiring of the conducting wire 12 of a one-stroke shape is complete | finished. In addition, in order to make it easy to see the wiring of the conducting wire 11 and the wiring of the conducting wire 12, the wiring of the conducting wire 11 and the conducting wire 12 is shown in FIGS.

  By the way, the electronic machine core 3 is attached to a winding machine (not shown). Then, the conducting wire 11 and the conducting wire 12 are supplied from two flyers (not shown) located in the radial direction via the rotating shaft 2, and the electronic machine core 3 is rotated so that the conducting wire 11 and the conducting wire 11 are substantially simultaneously Winding of the coil part C around the electronic machine core 3 of the conducting wire 12, engagement of the short-circuiting part D, and locking of the conducting wires 11 and 12 to the hook F are performed.

  FIG. 8 is a cross-sectional view of the vicinity of the commutator 4 of the electronic machine 3, and specifically shows a partial cross section near the segment S after the fusing welding of the hook F and the conductive wires 11 and 12. In the figure, (a) shows a state in which the conducting wires 11 and 12 are locked to the hook F, (b) shows a state immediately after fusing welding, and (c) shows a state in which the commutator 4 is electronic after fusing welding is finished. A state in which the machine core 3 has been moved to a regular position in the vicinity of one side surface 3a of the machine core 3 is shown.

  As shown in FIG. 8 (a), at least a part of the hook F (conducting wire) so that the coil portion C can be wound, the short circuit portion D can be engaged, and the conducting wires 11 and 12 can be locked to the hook. 11 and 12 are disposed outside the end face 5 of the coil portion, and the conductors 11 and 12 are locked to the hook F at this position. After the engagement of the conducting wires 11 and 12 to the hook F, the hook F is bent and fusing welding is performed (FIG. 8B). After the fusing welding is completed, the commutator 4 is re-pressed and moved in the direction of the one side surface 3a of the armature core 3. By this movement, the contact between the hook F and the coil part C or the short-circuit part D connected to the hook F is inside the coil part inner periphery 6 protruding from one side surface 3a of the armature core 3 of the coil part C, and It comes to the position of the one side surface 3a from the coil portion end surface 5 protruding from one side surface 3a of the coil portion C (FIG. 8C). Here, when the commutator 4 is moved, the lengths of the end portions of the coil portion C and the short-circuit portion D that are locked to the hook F so that the conducting wires 11 and 12 are not disconnected and the amount of movement of the commutator 4 are set appropriately. . That is, the length W1 (FIG. 8A) of the end portion before moving the commutator 4 is slightly longer than the length W2 (FIG. 8B) of the end portion after moving. The length W1, the length W2, and the amount of movement of the commutator 4 are set.

  The contact between the hook F and the coil portion C or the short-circuit portion D connected to the hook F may be close to the end surface 3c that is recessed from the one side surface 3a unless the hook F contacts the core 7. . Further, even when the end face 3c protrudes from the one side face 3a, the above-mentioned contact may be in the immediate vicinity of the end face 3c as long as the hook F does not contact the core 7.

  Further, the engagement of the short-circuit portion D is not limited to the patterns shown in FIGS. 1, 2, and 5, and the side surface 3 a of the armature core 3 passes through the slot L and reciprocates in the axial direction. Any pattern may be used as long as the short-circuit portion D is engaged with one or more teeth T on the other side surface 3b.

  Moreover, although the 12 teeth T of the armature core 3 of this embodiment are provided, it is sufficient if it is an even number of 4 or more.

  Moreover, although the conducting wire 11 and the conducting wire 12 are separate bodies, respectively, the conducting wire 11 and the conducting wire 12 are made into one conducting wire, the winding of the coil portion C around the armature core 3, the engagement of the short circuit portion D, The conductor may be locked to the hook F. However, it is preferable to use two conductors from the viewpoint of wiring work time.

  Further, since the segment S and the hook F are made of a good conductive material such as a copper alloy, the coil portion C and the short-circuit portion D locked to the hook F are made conductive after fusing welding. Accordingly, each coil part C and each short-circuit part D may be separate conductors. However, a conductive wire in which each coil part C and each short-circuit part D are continuous is preferable from the viewpoint of wiring work time.

  Furthermore, in the armature 1 of this embodiment, since the conducting wire 11 and the conducting wire 12 are used, the short-circuit portions D are opposed to each other in the radial direction via the rotating shaft 2 (shifted by 180 ° in circumferential angle). Two segments S are connected to each other at the position S, and a total of twelve segments, that is, the same number as the number of segments S, is provided, but by connecting one by one, six short-circuited portions D, that is, the number of segments S It may be half the number.

  Next, the operation and effect of the armature 1 according to the embodiment of the present invention will be described. The commutator 4 is inserted into the rotary shaft 2, and at least a part of the hook F (in order to be able to lock each end of each coil part C and each short-circuit part D to the armature core 3 to each hook F ( The portion where the conducting wires 11 and 12 are locked) is press-fitted to a position outside the coil portion end face 5. At this position, the conductors 11 and 12 are locked to the hooks F (FIG. 8A), and after the winding of the coil portions C and the engagement of the short-circuit portions D are completed, the hooks F are Bending and performing fusing welding (FIG. 8B). After the fusing welding is completed, the commutator 4 is re-pressed and moved in the direction of the one side surface 3a of the armature core 3. By this movement, as shown in FIG. 8C, the contact between the hook F and the coil part C or the short-circuit part D connected to the hook F is from the coil part inner periphery 6 protruding from one side surface 3a of the coil part C. It comes close to the end surface 3c on the inner side and at a position on the one side surface 3a side from the coil portion end surface 5 protruding from the one side surface 3a of the coil portion C. Accordingly, the distance between the one side surface 3a of the armature core 3 and the commutator 4 including the hook F can be shortened, and the axial length of the armature 1 can also be shortened. As a result, the armature 1 of a small DC motor that is flat in the axial direction can be provided.

  Further, for example, the central portion of the first short-circuit portion D1 is wired in the circumferential direction on both sides along one side surface 3a of two fifth and sixth teeth T5 and T6 sandwiched between the fourth and seventh teeth T4 and T7 at both ends. The The first short circuit portion D1 wired in the circumferential direction on both sides includes a fourth slot L4 and a sixth slot L6 formed by the fourth tooth T4 and the fifth tooth T5, the sixth tooth T6 and the seventh tooth T7, respectively. It passes toward the other side surface 3b and is wired along each other side surface 3b of the fourth and seventh teeth T4 and T7, respectively. The short-circuit portions D wired along the other side surfaces 3b pass through the third slot L3 and the seventh slot L7 formed at both ends of the outer fourth and seventh teeth T4 and T7, respectively, toward the one side surface 3a. Passing along the one side surface 3a in the vicinity of the commutator 4 of the armature core 3, it is connected to the second and eighth hooks F2 and F8 of the second and eighth segments S2 and S8, respectively. In this way, the short-circuit portion D passes through the slot L, follows the one side surface 3a and the other side surface 3b, and is engaged with the four teeth T while reciprocating in the axial direction, so that it does not float in the air. Contact with the commutator 4 and the rotating shaft 2 can be avoided, and short circuit failure due to contact can be suppressed.

  Moreover, the coil part C straddles 3 teeth T, and a conducting wire is wound, and the 12 1st coil part C1- 12th coil part C12 are formed. For example, the first coil portion C1 is wound over the first tooth T1, the second tooth T2, and the third tooth T3, and both ends of the first coil portion C1 are in the vicinity of the first first tooth T1, respectively. The first hook F1 of the first segment S1 is connected to the second hook F2 of the second segment S2 adjacent to the first segment S1 and in the vicinity of the second tooth S2. Since the second coil portion C2 to the twelfth coil portion C12 are also formed in the same manner as the first coil portion C1, the hooks F of the segments S to which both ends of the coil portion C are connected are adjacent and wound. It is in the vicinity of the teeth T. Therefore, the lead wire portion connected to the hook F from the winding portion of the coil portion C straddling the three teeth T can avoid contact with the hook F (or segment) or the rotating shaft 2, and the coil portion C Short-circuit failure due to contact of can be suppressed.

  Moreover, the stress of the short circuit part D is moderated appropriately by the zigzag wiring reciprocating in the axial direction of the short circuit part D mentioned above, and disconnection of the short circuit part D can be avoided.

  Further, when the conductors 11 and 12 are wired, the commutator 4 is arranged such that at least a part of the hook F (portion where the conductors 11 and 12 are locked) comes outside the coil part end face 5. At this position, the length W1 of the lead wire portion of the conducting wires 11 and 12 locked to the hook F is slightly smaller than the length W2 of the lead wire portion at the normal position where the commutator 4 has been moved to a position close to the one side surface 3a. Long (Figure 8). Therefore, the tension of the conducting wires 11 and 12 generated when the coil portion C is wound and locked to the hook F is appropriately mitigated after the commutator 4 is moved to the normal position, so that disconnection of the coil portion C is avoided. it can.

  Moreover, the conducting wire 11 and the conducting wire 12 are supplied facing the armature core 3 installed in the winding machine from the flyer of the winding machine. And by the conducting wire 11, the 1st coil part C1, 1st short circuit part D1, 2nd coil part C2, 2nd short circuit part D2, 3rd coil part C3, 3rd short circuit part D3, and 4th in order. Coil part C4, 4th short circuit part D4, 5th coil part C5, 5th short circuit part D5, 6th coil part C6, and 6th short circuit part D6 are wiring (winding of coil part C, Engagement of the short-circuit portion D and locking to the hook F). At substantially the same time, the seventh coil portion C7, the seventh short-circuit portion D7, the eighth coil portion C8, the eighth short-circuit portion D8, the ninth coil portion C9, and the ninth short-circuit portion D9 are sequentially provided by the conducting wire 12. The tenth coil part C10, the tenth short circuit part D10, the eleventh coil part C11, the eleventh short circuit part D11, the twelfth coil part C12, and the twelfth short circuit part D12 are wired in the same manner. The As a result, since the wiring work time of the armature 1 is shortened, the cost of the armature 1 is reduced.

  In addition, the armature 1 can provide two segments S that are opposed to each other in the radial direction via the rotating shaft 2 by providing the short-circuit portion D, and can have the same potential as shown in FIG. The pair of side brushes 14 need only be brought into sliding contact with the segment S of the commutator 4, which makes it unnecessary to provide a pair of brushes on the anode side and the cathode side, thereby reducing the cost of the armature 1.

  Further, as shown in FIG. 12, the armature 103 of the prior art cuts the unnecessary wire 119 of the short-circuit portion 116, but each short-circuit portion D of the present embodiment has no unnecessary wire and does not have to be cut. The cost of the armature core 3 is reduced by the cutting process. Thus, the low-cost DC motor armature 1 can be provided.

DESCRIPTION OF SYMBOLS 1 Armature 2 Rotating shaft 3 Armature core 3a One side surface 3b Other side surface 4 Commutator 5 Coil part end surface 6 Coil part inner periphery 11, 12 Conductor C Coil part D Short-circuit part F Hook L Slot S Segment T Teeth

Claims (3)

A rotation axis;
An armature core mounted on the rotating shaft and having twelve teeth;
A commutator mounted on the rotating shaft and in sliding contact with the anode-side power supply brush and the cathode-side power supply brush, and having the same number of segments as the teeth;
A plurality of coil portions wound around one or more teeth and connected to respective hooks provided in two predetermined segments;
A short-circuit portion connected to the hooks of the segments facing each other in the radial direction via the rotating shaft;
An armature with
The contact between the hook and the coil portion or the short-circuit portion connected to the hook is inside the coil portion inner periphery protruding from one side surface of the armature core of the coil portion, and the one side surface of the coil portion. Is located on the one side surface side from the end surface of the coil portion protruding from
The short-circuit portion passes through a slot formed between the teeth adjacent to each other, extends along the one side surface and the other side surface opposite to the one side surface, and is connected to one or more of the teeth. Interrogated ,
Twelve first teeth to twelfth teeth are sequentially provided in the teeth, and first segments to twelfth segments are provided corresponding to the first teeth to the twelfth teeth,
The short-circuit portion is wound around the four teeth excluding the teeth at both ends sandwiched between circumferential angles formed by the two segments to which both ends of the short-circuit portion are connected, and is connected to the segments. In addition, along the one side surface from both end sides of the short-circuit portion, each of the other side surfaces of the teeth at both ends is introduced into each of the slots formed outside the both ends of the four teeth and passes through the slot. And then, along the one side surface of the two teeth sandwiched between the teeth at both ends, passing through the slots formed inside the teeth at both ends toward the one side surface. To be
An armature characterized by that. The segment arranged between the circumferential angles formed by the first tooth and the second tooth is defined as a first segment, and the adjacent teeth are formed by the first tooth to the twelfth tooth. The first segment to the twelfth segment are sequentially arranged between the circumferential angles,
The coil part is wound in the same direction across the three teeth, and both ends of the coil part are between the circumferential angles formed by the teeth on both sides around which the coil part is wound. It is connected to each of the two provided segments, and 12 pieces are formed sequentially,
The short-circuit part is provided with 12 first short-circuit parts to 12th short-circuit parts,
The first short circuit part and the seventh short circuit part are connected to the second segment and the eighth segment, and the second short circuit part and the eighth short circuit part are the ninth segment and the third segment. The third short-circuit portion and the ninth short-circuit portion are connected to the fourth segment and the tenth segment, and the fourth short-circuit portion and the tenth short-circuit portion are the eleventh segment and the The fifth short circuit part and the eleventh short circuit part are connected to the sixth segment and the twelfth segment, and the sixth short circuit part and the twelfth short circuit part are connected to the fifth segment. Connected to one segment and the seventh segment;
The armature according to claim 1 . The said coil part and the said short circuit part are formed by winding and entraining a continuous conducting wire alternately in the shape of a one-stroke drawing, The one of Claim 1 or 2 characterized by the above-mentioned. Armature.

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