JP2010154660A - Motor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a motor having a simple and low-cost power supply structure for supplying power to a plurality of brushes. <P>SOLUTION: The motor is provided with: a plurality of brushes 32 and 33 which are slidably brought into contact with a commutator of an armature shaft; a brush holder 20 having a brush box 31 for storing the brushes so as to be retractable; and a plurality of terminals 45, 46 and 47 which are electrically connected to the brushes through pigtail wires 34 and are fitted to the brush holder. Power supply lead wires 35, 36 and 39 are wired in the brush holder 20. One end of each lead wire is electrically connected to each pigtail wire 34. The other ends 35b, 36b and 39b of each lead wire are made to pass through a through hole formed in the brush holder so as to be projected to the outside. The other ends 35b, 36b and 39b of each lead wire protruding to the outside are electrically connected to the terminals 45, 46 and 47. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a motor including a brush holder that holds a brush that is in sliding contact with a commutator of a motor shaft.

  For example, a motor including a conductive terminal for supplying power to a brush and a choke coil for reducing electromagnetic noise is known (see, for example, Patent Document 1).

  In this motor, a terminal assembly (terminal assembly part) composed of a terminal, a choke coil, and a relay terminal is assembled on the inner surface of the ceiling portion of the gear case cover.

JP 2005-124288 A

  The conventional motor has a structure in which stress is not applied to the joint portion between the terminal, the choke coil, and the relay terminal, but each component becomes complicated and the terminal shape becomes large. Increased costs. In addition, after joining the terminal, choke coil and relay terminal by welding or soldering, etc., it was assembled to the inner surface of the ceiling of the gear case cover. There was a fear.

  Therefore, the present invention has been made to solve the above-described problems, and an object thereof is to provide a motor capable of simplifying and reducing the cost of a power feeding structure that feeds power to a plurality of brushes.

  According to a first aspect of the present invention, a plurality of brushes slidably in contact with the armature shaft commutator, a brush holder to which a brush box for storing the brushes in a retractable manner is attached, and each brush are electrically connected to each other via a pigtail wire In a motor provided with a plurality of terminals attached to the brush holder, a plurality of lead wires for power feeding are wired in the brush holder, and one end side of each lead wire is electrically connected to each pigtail wire And the other end of each lead wire passes through a through-hole formed in the brush holder and protrudes outward, and the other end of each lead wire protruding outward and each terminal are connected to each other. It is characterized by electrical connection.

  A second aspect of the present invention is the motor according to the first aspect, wherein each terminal and a pair of terminal holders holding the terminals constitute a connector unit, and the connector unit is connected to the bottom wall portion of the brush holder. The other end of each lead wire is inserted and electrically connected to the base end of the terminal bent into a U shape.

  The invention of claim 3 is the motor according to claim 2, wherein each of the pair of terminal holders is formed in the same shape.

  Invention of Claim 4 is the motor of Claim 2 thru | or 3, Comprising: The insertion hole of the reverse conical surface shape which penetrates the other end part of each said lead wire was formed in the said pair of terminal holder, It is characterized by the above-mentioned. To do.

  The invention according to claim 5 is the motor according to any one of claims 1 to 4, wherein the pair of terminal holders has a U-shaped base end portion of each terminal and the other end portion of each lead wire. Each of the openings is exposed, and the U-shaped base end of each terminal is crushed by a pair of electrodes from both sides of each opening, and at the same time, the U-shaped base end of each terminal The other end of each lead wire is welded and joined.

  As described above, according to the invention of claim 1, a plurality of lead wires for power feeding are wired in the brush holder, one end side of each lead wire is electrically connected to each pigtail wire, and By passing the other end of each lead wire through the through-hole formed in the brush holder and projecting outward, and electrically connecting the other end of each lead wire projecting outward and each terminal The other end of each lead wire protruding outside the brush holder and each terminal can be connected easily and reliably, and the number of parts and assembly steps can be reduced. As a result, the overall cost can be reduced.

  According to the invention of claim 2, each terminal and a pair of terminal holders holding the terminals constitute a connector unit, and the connector unit is detachably attached to the bottom wall portion of the brush holder. The other end of each lead wire is inserted and electrically connected to the base end that is bent in a letter shape, so that the U-shape of each terminal can be simply attached to the bottom wall of the brush holder. The other end portion of each lead wire can be inserted into the base end portion, and the assembling work can be simplified.

  According to the invention of claim 3, since the pair of terminal holders are formed in the same shape, the molds can be reduced and the cost can be reduced.

  According to the fourth aspect of the present invention, the other end of each lead wire is connected to the pair of terminal holders by forming the inverted conical surface insertion hole through which the other end of each lead wire is inserted into the pair of terminal holders. It can be easily and smoothly inserted through the formed inverted conical surface insertion hole.

  According to the invention of claim 5, each of the pair of terminal holders is formed with an opening that exposes the U-shaped base end of each terminal and the other end of each lead wire, and from both sides of each opening. By crushing the U-shaped base end portion of each terminal with a pair of electrodes, and simultaneously welding the U-shaped base end portion of each terminal and the other end portion of each lead wire, After the connector unit is attached to the bottom wall portion, the U-shaped base end portion of each terminal and the other end portion of each lead wire can be electrically connected. As a result, it is possible to reliably prevent the joint portion between the U-shaped base end portion of each terminal and the other end portion of each lead wire from being peeled off, and to maintain a good conductive state at all times.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  1 is a perspective view showing a motor according to an embodiment of the present invention, FIG. 2 is a perspective view of a brush holder supported by a gear case cover of the motor as seen from the cover side, and FIG. 3 is a perspective view of the brush holder. 4 is a perspective view showing a state before the connector unit is attached to the bottom side of the brush holder, FIG. 5 is a perspective view showing a state where one terminal holder of the connector unit is removed, and FIG. 6 is a brush holder of the brush holder. FIG. 7 is a perspective view showing a state before a circuit breaker is attached to the brush holder body, and FIG. 8 is a side view of the brush holder body. FIG. 9 is a partially enlarged perspective view showing a state in which a stationary choke coil is attached, and FIG. 9 is a view before attaching a lead wire for a circuit breaker to the brush holder body. FIG. 10 is a perspective view showing a state in which a vertically placed and a horizontally placed choke coil, a circuit breaker, and a lead wire are respectively attached to the brush holder main body, and FIG. 11 is a bottom wall portion of the brush holder main body. FIG. 12 is a perspective view showing a state in which the other end portions of the plurality of lead wires are protruded outward from the bottom wall portion of the brush holder body. is there.

  As shown in FIGS. 1 and 2, the motor 10 includes a bottomed cylindrical yoke (motor case) 11 in which an armature (not shown) is accommodated, and a flange portion 11 a around the opening of the yoke 11 with screws 17. A speed reduction mechanism (not shown) comprising a worm formed on an armature shaft (motor shaft) 15 of an armature and a worm wheel meshing with the worm, which is fastened and fixed to a flange portion 12b around the opening of the cylindrical portion 12a. And a gear case cover 13 that is fastened and fixed to the side wall portion 12c of the gear case 12 via screws 18 to cover the opening of the side wall portion 12c. As shown in FIG. 2, the connector unit 40 of the brush holder 20 is detachably fitted into the female connector portion 13 a integrally formed on the inner surface of the gear case cover 13. Thereby, when assembling the motor 10, the brush holder 20 is positioned and assembled at a predetermined position in the cylindrical portion 12a of the gear case 12.

  As shown in FIGS. 2 to 4, the brush holder 20 allows a pair of brushes 32, 32 for supplying power to supply power to the commutator 16 of the armature shaft 15 and a brush 33 for grounding (grounding) so as to freely appear and disappear. An annular plate-like stay 30 made of synthetic resin with three brush boxes 31, 31, 31 to be housed attached, and the stay 30 is attached to the bottom wall portion 22, and a pair of power feeds are provided inside the peripheral wall portion 23. A substantially semi-cylindrical choke coil housing portion 24 for housing a vertically placed choke coil 35 for reducing electromagnetic noise connected to the brushes 32, 32 and a square concave choke coil housing portion for housing a horizontally placed choke coil 36, respectively. A brush holder main body 21 made of a synthetic resin formed with 26 and a lower surface 22b of the bottom wall portion 22 of the brush holder main body 21 are detachably attached. The and a connector unit 40.

  As shown in FIGS. 2 to 4, a circular through hole 30 a that allows the commutator 16 of the armature shaft 15 to pass through is formed in the center of the stay 30. Each brush box 31 is radially attached to the upper surface 30b of the stay 30 so as to sandwich the through hole 30a, and the brushes 32 and 33 are accommodated in the brush box 31 so as to be able to appear and retract. The brushes 32 and 33 are pressed and biased so as to come into contact with the commutator 16 by biasing means such as a compression coil spring (not shown). Recessed notches 30d and 30e are formed on the outer peripheral edge 30c side of the stay 30 where the power supply brush box 31 and the grounding brush box 31 are attached. Further, a plurality of outer peripheral edges 30 c of the stay 30 are formed on the inner peripheral surface 23 a of the peripheral wall portion 23 of the brush holder main body 21, and are held between the lower locking claws 23 b and 23 c.

  As shown in FIGS. 6 to 12, the bottom wall portion 22 of the brush holder main body 21 is formed in an elliptical annular plate shape, and electromagnetic noise is formed between the upper surface 22 a and one vertical wall portion of the peripheral wall portion 23. A substantially semi-cylindrical choke coil housing portion 24 for housing a vertically placed choke coil 35 for reduction is formed. The choke coil 35 housed and held in the substantially semi-cylindrical choke coil housing portion 24 has a cylindrical magnet 35d fixed to the winding portion 35c by bonding or the like, and one end portion 35a is attached to one end portion 35a. 34a is joined to the other end 34b of the pigtail wire 34 connected to the power supply brush 32 by caulking a caulking plate 34c. Further, as shown in FIG. 11, the other end portion 35b serving also as the lead wire of the choke coil 35 is penetrated through the first through hole 25a formed in the bottom wall portion 22 of the brush holder body 21 and protrudes outward. ing. A pair of locking projections 42, 42 of each terminal holder 41 of the connector unit 40 described later are locked to and detached from the bottom wall portion 22 of the brush holder main body 21 around the first through hole 25a. Locking holes 23d and 23d are respectively formed.

  As shown in FIGS. 6 to 12, a horizontally placed choke coil 36 is housed between the upper surface 22a of the bottom wall portion 22 of the brush holder body 21 and one vertical wall portion of the peripheral wall portion 23 for electromagnetic noise reduction. A rectangular concave choke coil housing portion 26 is formed, and also serves as a lead wire for the horizontally placed choke coil 36 from the choke coil housing portion 26 on the upper surface 22a of the bottom wall portion 22 to the second through hole 25b. A storage groove 27 for routing the other end 36b is formed. On both sides of the choke coil housing portion 26, a pair of locking claws 26a, 26a for holding the horizontally placed choke coil 36 for electromagnetic noise reduction are integrally formed. A pair of protrusions (locking portions) 27a and 27a and a pair of locking claws (locking portions) 27b and 27b for locking the other end portion 36b of the horizontally placed choke coil 36 are provided on both sides of the storage groove portion 27. It is formed.

  Further, the other end portion 36 a of the choke coil 36 is held on the peripheral wall portion 23 in the vicinity of the one locking claw 26 a that holds the choke coil 36 housed in the square concave choke coil housing portion 26 of the brush holder body 21. A C-shaped clamp portion 26c is integrally formed.

  As shown in FIG. 6, a choke coil 36 housed and held in a square concave choke coil housing portion 26 has a cylindrical magnet 36d fixed thereto by bonding or the like in its winding portion 36c, and its one end portion 36a. The other end portion 34b of the pigtail wire 34 having one end portion 34a connected to the power supply brush 32 is joined by caulking a caulking plate 34c. As shown in FIGS. 7, 10, and 11, the other end portion 36 b that also serves as a lead wire of the choke coil 36 is formed in the bottom wall portion 22 of the brush holder main body 21 and is routed in the storage groove portion 27. At the same time, it penetrates through the second through hole 25b and protrudes outward. Each of the choke coils 35 and 36 is a coil for reducing electromagnetic noise (for preventing noise) for the purpose of blocking a relatively high frequency current and allowing only a direct current or a relatively low frequency current to pass. .

  7 and 9 to 12, a circuit breaker 37 for preventing overcurrent is provided between the upper surface 22a of the bottom wall portion 22 of the brush holder body 21 and the other vertical wall portion of the peripheral wall portion 23. And a storage groove 29 for routing the lead wire 39 from the circuit breaker storage portion 28 on the upper surface 22a of the bottom wall portion 22 to the third through hole 25c. It is. A pair of protrusions (locking portions) 29 a and 29 a for locking the lead wire 39 and a pair of locking claws (locking portions) 29 b and 29 b are formed on both sides of the storage groove portion 29. Further, a C-shaped clamp portion 29 c that holds the bent end portion 39 a of the lead wire 39 is integrally formed on the peripheral wall portion 23 where one end of the storage groove portion 29 of the brush holder body 21 is located.

  As shown in FIGS. 7 and 9 to 11, one end portion 34 a of the circuit breaker terminal 38 of the circuit breaker 37 stored in the circuit breaker storage portion 28 is connected to the ground brush 33. The other end 34b of the pigtail wire 34 is joined by spot welding. Further, one end 39a of a lead wire 39 routed in the storage groove 29 is joined to the other end 38b of the circuit breaker terminal 38 by spot welding. The other end 39b of the lead wire 39 routed in the storage groove 29 penetrates through the third through hole 25c and protrudes outward. The circuit breaker terminal 38 fixed to the circuit breaker 37 is held by a locking piece portion 23e formed integrally with the peripheral wall portion 23 of the brush holder body 21. An earth terminal 19 is joined to the other end 38 b of the circuit breaker terminal 38 by spot welding, and the earth terminal 19 comes into contact with the cylindrical portion 12 a of the gear case 12.

  As shown in FIGS. 3 to 5, the connector unit 40 includes a pair of power supply terminals 45 and 46 that supply power to the pair of brushes 32 and 32 and a grounding (earth) connected to the grounding brush 33. And a pair of terminal holders 41, 41 having the same shape and made of synthetic resin that holds the terminals 45, 46, 47.

  On the upper surface of the pair of terminal holders 41, 41 of the connector unit 40, the pair of locking holes (engaging portions) 23d, 23d formed in the bottom wall portion 22 of the brush holder main body 21 are locked and detached. A pair of locking projections (locking portions) 42 and 42 are integrally formed. Further, on the upper surfaces of the pair of terminal holders 41, 41, the other end portions 35b, 36b of the choke coils 35, 36 and the other end portion of the lead wire 39 are communicated with the internal terminal storage portions 41a, 41b, 41c. Recessed conical insertion holes 43a, 43b, 43c through which 39b are inserted are formed.

  Further, on the side surfaces of the pair of terminal holders 41, 41, base end portions 45 a, 46 a, 47 a that are bent in a U shape of the terminals 45, 46, 47 and U shapes of the terminals 45, 46, 47 are provided. Openings 44a, 44b and 44c are formed to expose the other end portions 35b and 36b of the choke coils 35 and 36 and the other end portion 39b of the lead wire 39 inserted into the base end portions 45a, 46a and 47a. It is. That is, as shown in FIG. 5, a long terminal 45 for power feeding is accommodated in a lower terminal accommodating portion 41a formed between a pair of terminal holders 41, 41, and the U-shaped of the terminal 45 is formed. The other end portion 35b serving also as a lead wire for feeding power to one choke coil 35 is inserted into the base end portion 45a, and these are exposed from the lower opening 44a of the pair of terminal holders 41 and 41. ing. Further, a middle power supply terminal 46 is accommodated in a middle terminal accommodating portion 41b formed between the pair of terminal holders 41, 41, and the other U-shaped base end portion 46a of the terminal 46 is accommodated in the other end. The choke coil 36 is inserted through the other end 36b serving also as a lead wire for power feeding, and is exposed from the opening 44b at the middle stage of the pair of terminal holders 41, 41. Further, a short grounding terminal 47 is accommodated in an upper terminal accommodating portion 41c formed between the pair of terminal holders 41 and 41, and a U-shaped base end portion 47a of the terminal 47 is supplied with power. The other end 39b of the lead wire 39 is inserted, and these are exposed from the upper opening 44c of the pair of terminal holders 41, 41.

  And as shown in FIG. 3, the U-shaped base end of each terminal 45, 46, 47 by a pair of electrodes 49, 49 from the both sides of each opening part 44a, 44b, 44c of a pair of terminal holder 41, 41 At the same time that the portions 45a, 46a, 47a are crushed, the U-shaped base ends 45a, 46a, 47a of the terminals 45, 46, 47, the other ends 35b, 36b of the choke coils 35, 36, and the lead wire 39 The other end 39b is joined by spot welding. A plurality of locking projections 41d are formed at one end of each of the pair of terminal holders 41, 41, and a plurality of locking recesses 41e are formed at the other end. By being fitted so as to face the plurality of locking projections 41d of one terminal holder 41 and the plurality of locking recesses 41e of the other terminal holder 41, they can be combined. Further, the tip portions 45b, 46b, 47b of the terminals 45, 46, 47 joined by spot welding protrude outward from the front of the pair of terminal holders 41, 41 and are connected to the female connector portion 13a of the gear case cover 13. It is designed to be fitted.

  According to the motor 10 of the above embodiment, when assembling the brush holder 20, as shown in FIG. 6, for supplying power via the pigtail wire 34 in the substantially semi-cylindrical choke coil housing portion 24 of the brush holder body 21. The winding portion 35c of the vertically installed choke coil 35 to which the brush 32 is connected is housed and held, and the other end portion 35b also serving as a lead wire for power supply is formed on the bottom wall portion 22 of the brush holder body 21. It penetrates through the first through hole 25a thus formed and projects outward.

  Similarly, a winding portion 36c of a horizontally placed choke coil 36 to which a power feeding brush 32 is connected via a pigtail wire 34 is accommodated in a square concave choke coil housing portion 26 of the brush holder body 21. While being held by the pair of locking claws 26a, 26a, the other end portion 36b serving also as a lead wire for power feeding is routed in a storage groove portion 27 formed in the bottom wall portion 22 of the brush holder body 21. The other end 36b of the choke coil 36 routed in the storage groove 27 is locked to the pair of protrusions 27a and 27a and the pair of locking claws 27b and 27b as shown in FIGS. Therefore, it will not fall out. Further, the other end portion 36 b serving also as a lead wire for power feeding of the choke coil 36 is penetrated through the second through hole 25 b formed in the bottom wall portion 22 of the brush holder main body 21 so as to protrude outward.

  Next, as shown in FIGS. 7 and 9, a circuit breaker terminal 38 in which a grounding brush 33 is connected to an engaging piece 23 e of the circuit breaker storage portion 28 of the brush holder main body 21 via a pigtail wire 34 is provided. The circuit breaker 37 is locked, and the lead wire 39 is routed in the storage groove 29 formed in the bottom wall portion 22 of the brush holder main body 21. At this time, the bent one end portion 39 a of the lead wire 39 is pushed into the C-shaped clamp portion 29 c of the brush holder body 21 and fixed. Since the lead wire 39 routed in the storage groove 29 is locked by the pair of protrusions 29a and 29a and the pair of locking claws 29b and 29b, the lead wire 39 does not fall off. Next, the other end 38b of the circuit breaker terminal 38 and one end 39a of the lead wire 39 are joined by spot welding. Further, the other end 39b of the lead wire 39 routed in the storage groove 29 is penetrated through the third through hole 25c so as to protrude outward.

  As shown in FIG. 4, the other end portions 35 b and 36 b of the choke coils 35 and 36 projecting a predetermined length outward from the lower surface 22 b of the bottom wall portion 22 of the brush holder main body 21 and the other end portion 39 b of the lead wire 39. Are inserted easily and smoothly through insertion holes 43a, 43b, 43c having an inverted conical surface formed on the upper surface of the connector unit 40, and the bottom wall portion 22 of the brush holder main body 21 as shown in FIG. When the connector unit 40 is attached to the lower surface 22b, the other end portion 35b of one choke coil 35 is inserted into the U-shaped base end portion 45a of the terminal 45 housed in the lower terminal housing portion 41a of the connector unit 40. Also, the other end portion 36b of the other choke coil 36 is connected to the U-shaped base end portion 46a of the terminal 46 accommodated in the terminal housing portion 41b in the middle stage. Through, The other end portion 39b of the lead wires 39 in a U-shaped base end portion 47a of the terminal 47 housed in the upper part of the terminal accommodating portion 41c is inserted. At this time, the U-shaped base end portion 45a of the terminal 45 and the other end portion 35b of one choke coil 35 inserted through the U-shaped base end portion 45a are exposed from the lower opening 44a of the connector unit 40. Further, the U-shaped base end portion 46a of the terminal 46 and the other end portion 36b of the other choke coil 36 inserted into the U-shaped base end portion 46a are exposed from the opening 44b in the middle stage, and The U-shaped base end portion 47a of the terminal 47 and the other end portion 39b of the lead wire 39 inserted through the U-shaped base end portion 47 are exposed from the upper opening 44c.

  Next, as shown in FIG. 3, a U-shaped base end 45a of each terminal 45, 46, 47 is formed by a pair of electrodes 49, 49 from both sides of each opening 44a, 44b, 44c of the connector unit 40. At the same time as crushing 46a, 47a, the U-shaped base end portions 45a, 46a, 47a of the terminals 45, 46, 47, the other end portions 35b, 36b of the choke coils 35, 36, and the other end of the lead wire 39 The portions 39b are joined to each other by spot welding. And the brush holder 20 is assembled by attaching the stay 30 which attached the brush box 31 to the brush holder main body 21.

  As described above, the choke coils 35, 36 as lead wires for power feeding, in which the pigtail wires 34 and the terminals 45, 46, 47 of the brushes 32, 33 are routed on the bottom wall portion 22 of the brush holder body 21. The other end portions 35b, 36b and the lead wires 39 are electrically connected to each other, thereby eliminating the need for a terminal assembly (terminal assembly part) having a complicated shape as in the prior art. It can be reduced and the cost can be reduced. By using the other end portions 35b and 36b of the choke coils 35 and 36 as lead wires for power feeding, there is no need to provide a separate noise prevention element, and accordingly, the number of parts and the cost can be further reduced. be able to.

  Further, the other end portions 35b, 36b of the respective choke coils 35, 36 and the other end portion 39b of the lead wire 39 are protruded from the lower surface 22b of the bottom wall portion 22 of the brush holder body 21 by a predetermined length so that the brush holder body 21 When the connector unit 40 is attached to the lower surface 22 b of the bottom wall portion 22, the other end portions 35 b and 36 b of the choke coils 35 and 36 projecting a predetermined length outward and the other end portion 39 b of the lead wire 39 are connected to the connector unit 40. The U-shaped base end portions 45a, 46a, 47a of the terminals 45, 46, 47 and the terminals 45, 47a, 43b, 43c are inserted through the reverse conical surface insertion holes 43a, 43b, 43c formed on the upper surface. The other end portions 35b, 36b of the choke coils 35, 36 inserted into the U-shaped base end portions 45a, 46a, 47a of 46, 47 and the other end portion of the lead wire 39. 9b is exposed to each opening 44a, 44b, 44c of the connector unit 40, and a pair of electrodes 49, 49 from both sides of each opening 44a, 44b, 44c form a U-shape of each terminal 45, 46, 47. At the same time, the base end portions 45a, 46a, and 47a of the U-shaped base end portions 45a, 46a, and 47a of the terminals 45, 46, and 47, the other end portions 35b and 36b of the choke coils 35 and 36, and leads After attaching the connector unit 40 to the bottom wall portion 22 of the brush holder main body 21 by spot welding joining to the other end portion 39b of the wire 39, U-shaped base end portions of the terminals 45, 46, and 47 45a, 46a, 47a and the other end portions 35b, 36b of the choke coils 35, 36 and the other end portion 39b of the lead wire 39 can be connected easily and reliably. Kill.

  Thereby, the junction part of U-shaped base part 45a, 46a, 47a of each terminal 45, 46, 47, the other end part 35b, 36b of each choke coil 35, 36, and the other end part 39b of the lead wire 39. Can be reliably prevented, and a good conduction state can always be maintained. In addition, the assembly work is simple, no large equipment is used, and the material cost is reduced, so the number of parts and assembly processes can be greatly reduced, and the overall cost can be reduced. .

  According to the embodiment, the other end portion of the circuit breaker terminal and one end portion of the lead wire, and the U-shaped base end portion of each terminal and each choke inserted through the U-shaped base end portion The other end of the coil and the other end of the lead wire are joined by spot welding, but may be joined by other means such as soldering.

It is a perspective view which shows the motor of one Embodiment of this invention. It is the perspective view which looked at the brush holder supported by the gear case cover of the said motor from the cover side. It is a perspective view of the said brush holder. It is a perspective view which shows the state before attaching a connector unit to the bottom face side of the said brush holder. It is a perspective view which shows the state which removed one terminal holder of the said connector unit. It is a perspective view which shows the state before attaching the vertically placed and the horizontally placed choke coil to the brush holder body of the brush holder. It is a perspective view which shows the state before attaching a circuit breaker to the said brush holder main body. It is a partial expansion perspective view which shows the state which attached the horizontal installation choke coil to the said brush holder main body. It is a perspective view which shows the state before attaching the lead wire for circuit breakers to the said brush holder main body. It is a perspective view which shows the state which attached the choke coil and circuit breaker, and the lead wire which were installed vertically and horizontally to the said brush holder main body, respectively. It is a partial expansion perspective view which shows the state which wired the several lead wire to the bottom wall part of the said brush holder main body. It is a perspective view which shows the state which protruded the other end part side of the several lead wire to the outer side from the bottom wall part of the said brush holder main body, respectively.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Motor 15 Armature shaft 16 Commutator 20 Brush holder 22 Bottom wall part 25a, 25b, 25c Through-hole 31 Brush box 32, 33 Brush 34 Pigtail wire 35 Choke coil 35b The other end (lead wire for power supply)
36 Choke coil 36b The other end (lead wire for power supply)
39 Lead wire for power supply 39b Other end 40 Connector unit 41, 41 Pair of terminal holders 43a, 43b, 43c Reverse conical insertion holes 44a, 44b, 44c Openings 45, 46, 47 Terminals 45a, 46b, 47b U-shaped base end

Claims (5)

A plurality of brushes slidably in contact with the armature shaft commutator, a brush holder to which a brush box for storing the brush in a retractable manner is attached, and each brush is electrically connected via a pigtail wire and attached to the brush holder In motors with multiple terminals,
A plurality of lead wires for power feeding are wired in the brush holder, one end of each lead wire is electrically connected to each pigtail wire, and the other end of each lead wire is connected to the brush holder. A motor characterized in that it penetrates through the formed through-hole and projects outward, and the other end of each lead wire projecting outward is electrically connected to each terminal. The motor according to claim 1,
Each terminal and a pair of terminal holders holding each terminal constitute a connector unit, and this connector unit is detachably attached to the bottom wall portion of the brush holder, and is bent into a U-shape of each terminal. A motor characterized in that the other end portion of each lead wire is inserted into and electrically connected to the proximal end portion. The motor according to claim 2,
A motor characterized in that the pair of terminal holders are formed in the same shape. The motor according to claim 2, wherein
A motor having an inverted conical surface insertion hole through which the other end portion of each lead wire is inserted into the pair of terminal holders. The motor according to any one of claims 2 to 4,
Openings for exposing the U-shaped base end portions of the terminals and the other end portions of the lead wires are respectively formed in the pair of terminal holders, and the pair of electrodes are used to form the openings from both sides of each opening portion. A motor characterized in that a U-shaped base end portion of each terminal is crushed and at the same time a U-shaped base end portion of each terminal is welded to the other end portion of each lead wire.

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