JP2008278574A - Power feeding structure of motor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a compact power feeding structure of a motor having a power feeding component to be easily detachable from a housing. <P>SOLUTION: The power feeding structure of the motor comprises: a cover 20 which is fixed to the opening end of a yoke, and has a bottomed cylindrical connector 23 to which a power feeding connector is fitted; a brush holder 30 which is accommodated in the cover and has a circular penetration hole; a plurality of terminals 35, 36 which are attached to a terminal installation part 31d of the brush holder, penetrate the bottom wall 24 of the connector of the cover, and protrude into the connector by prescribed amounts; and a terminal holder 40 for holding the plurality of terminals. In the power feeding structure of the motor having an elastic claw 43 of the terminal holder locked to a locking part 25b of the cover, a flexible arm 42 having the elastic claw is arranged at the terminal holder as the power feeding component, and a tool attachment hole 44 for a removing tool is formed at the tip of the flexible arm. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a power feeding structure for a motor having a connector portion into which a mating connector for power feeding is fitted.

  Some motors of this type have a power supply component such as a connector fitted with a mating connector for power supply in a housing such as a case. At this time, a claw and a hole are provided on the housing side, and an elastic claw of the power feeding component is locked to these to fix the power feeding component to the housing.

JP-A-8-163812

  In the conventional motor, the coupling structure between the housing and the power feeding component is exposed to the outside, and when it is released with a removal tool or the like, it is easy to release it. If it exists inside, it is necessary to insert a lock release mechanism or a release tool, which may increase the size of the entire apparatus.

  Therefore, the present invention has been made to solve the above-described problems, and provides a power feeding structure for a motor that can easily attach or remove power feeding components to a housing and can reduce the overall size. The purpose is to do.

  According to the first aspect of the present invention, there is provided a yoke having a magnet fixed thereto, a housing fixed to the open end of the yoke, and housing a power supply component therein, and a circular penetration that is housed in the housing and through which a commutator passes. A brush holder formed with a hole, and at least a pair of brush holders that are formed so as to sandwich the through hole of the brush holder so as to be retractable. A locking portion is provided inside the housing. A flexible arm in which the elastic claw is formed on the power supply component in a power supply structure of a motor in which an elastic claw provided on the power supply component is locked to a stopper and the power supply component is attached inside the housing. And a jig mounting hole for a removal jig is formed at the tip of the flexible arm.

  According to a second aspect of the present invention, there is provided a power feeding structure for a motor according to the first aspect, wherein a bottomed cylindrical connector portion into which a mating connector for power feeding is fitted is formed in the housing, and the bottom wall of the connector portion is formed. A base portion of a plurality of terminals projecting a predetermined length into the connector portion, and holding a midway portion of the plurality of terminals with a terminal holder as the power supply component, and on the back side of the bottom wall of the connector portion A concave terminal holder accommodating portion for accommodating the terminal holder is formed, and elastic claws of flexible arms provided on both sides of the terminal holder are detachably locked to both side walls of the terminal holder accommodating portion. A locking part is formed, and a jig mounting hole for a removal jig is formed in the thick part at the tip of the flexible arm on both sides of the terminal holder.

  The invention according to claim 3 is the power feeding structure of the motor according to claim 2, wherein the connector portion has an opening through which the jig mounting hole of the flexible arm is exposed in a direction perpendicular to the storing direction of the power feeding component. A part is formed.

  As described above, according to the first aspect of the present invention, the power supply component is provided with the flexible arm in which the elastic claw is formed, and the jig mounting hole for the removal jig is formed at the tip of the flexible arm. Thus, even when the housing has a locking portion for locking the elastic claw of the power feeding component, the housing does not increase in size, and the elastic claw of the power feeding component is locked to the locking portion inside the housing. Or can be easily released.

  According to the second aspect of the present invention, a bottomed cylindrical connector portion into which a mating connector for power feeding is fitted is formed in the housing, and a plurality of terminals projecting a predetermined length into the connector portion on the bottom wall of the connector portion And forming a concave terminal holder storage part in which the terminal holder is stored on the back side of the bottom wall of the connector part. A locking portion for detachably locking the elastic claws of the flexible arm provided on both sides of the terminal holder is formed on both side walls of the terminal holder storage portion. By forming a jig mounting hole for the removal jig in the thick part at the tip of the flexible arm, the middle part of multiple terminals is securely held by the terminal holder, With deformation or looseness of the terminal scale can be reliably prevented, the stress during detachment of the mating connector to the connector portion of the housing can be reliably received by the terminal holder. In addition, by attaching a detaching jig to the jig mounting hole of the flexible arm, the locking state between the locking portion inside the housing and the elastic claw of the power supply component can be easily released to supply power from the inside of the housing. Parts can be easily removed.

  According to the invention of claim 3, by forming the opening in which the jig mounting hole of the flexible arm is exposed in the connector portion, the connector is removed from the jig mounting hole of the flexible arm exposed from the opening. It is possible to easily remove the power supply component from the inside of the housing by mounting the tool and easily releasing the lock state between the locking portion inside the housing and the elastic claw of the power supply component. Thereby, size reduction of a housing can be achieved.

  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 an exploded perspective view of the motor, FIG. 3 is a perspective view of the state before the cover of the motor is attached, and FIG. FIG. 5 is a front view of the motor before the cover of the motor is attached, FIG. 5 is a front view of the motor, FIG. 6 is a longitudinal sectional view of a terminal holder housing portion of the motor, and FIG. 7 is a connector portion of the motor. FIG. 8 is a perspective view of a terminal holder used in the motor.

  As shown in FIGS. 1 to 4, the motor 10 includes a metal-made cylindrical yoke 11 that is open on both sides, and a synthetic resin cap 12 that is fixed by crimping to an opening end 11 a on the rear side of the yoke 11. And a synthetic resin-made bottomed cylindrical cover (housing) 20 that is caulked and fixed to the opening end 11 c on the front side of the yoke 11, and sandwiched and fixed between the opening end 11 c on the front side of the yoke 11 and the cover 20. The synthetic resin brush holder 30 is used, for example, as a drive source of a seat slide mechanism for sliding a vehicle seat.

  As shown in FIG. 2, a pair of magnets 13 and 13 are fixed to the inner peripheral surface 11 e of the cylindrical yoke 11 via an adhesive or the like. Further, as shown in FIG. 4, a circular through hole 12a is formed in the center of the cap 12, and a bearing (not shown) is disposed inside the cylindrical portion 12b around it. Further, as shown in FIGS. 2 and 4, a circular through hole 22a is formed in the center of the cover 20, and a bearing 14 is fitted inside a cylindrical portion 22b around the circular through hole 22a. Each bearing 14 rotatably supports both ends 15a, 15a of a double-sided output shaft type armature shaft 15. A square hole 15b is formed at the center of each end face of both ends 15a, 15a of the armature shaft 15. Each square hole 15b is connected to a rod-like cable or the like of a seat slide mechanism (not shown).

  As shown in FIG. 2, an armature 16 including an armature core and an armature coil is attached to a position of the armature shaft 15 facing the pair of magnets 13 and 13. Further, a commutator 17 is fixed at a position facing the opening end 11 c on the front side of the yoke 11 of the armature shaft 15. The commutator 17 includes a predetermined number of commutator pieces 17a. As shown in FIG. 2, a washer 18 and an annular elastic body 19 are interposed between the commutator 17 at one end 15 a of the armature shaft 15 and the bearing 14.

  As shown in FIGS. 2 to 4, a substantially disc-shaped brush holder 30 made of synthetic resin is accommodated in the cover 20 fixed by crimping to the opening end 11 c on the front side of the yoke 11. Yes. As shown in FIGS. 1 to 4, the cover 20 is integrally formed with a cylindrical wall portion 21 that houses the brush holder 30 and an upper portion of the cylindrical wall portion 21, and a mating connector 50 for feeding is fitted into the cover 20. A rectangular cylindrical connector portion 23 having a bottom wall 24 to be joined, and a concave shape which is integrally formed on the back side of the bottom wall 24 of the connector portion 23 and has an open upper surface side for detachably storing a terminal holder 40 described later. Terminal holder storage portion 25. A circular through hole 22 a is formed at the center of the bottom wall 22 of the cylindrical wall portion 21 of the cover 20. Further, a pair of upper and lower step portions 21 a and 21 b are formed on both outer sides of the cylindrical wall portion 21 of the cover 20. A pair of upper and lower caulking piece portions 11f and 11g formed on both sides of the opening end 11c on the front side of the yoke 11 are swaged and locked to the pair of upper and lower step portions 21a and 21b. ing. As a result, the cover 20 accommodates and holds the brush holder 30 and is fixed to the opening end 11 c on the front side of the yoke 11.

  Further, as shown in FIG. 4, a pair of abutments that abut both side portions of the brush holder body 31 of the brush holder 30 at opposite positions of the inner peripheral surface (inner surface) 21 c of the cylindrical wall portion 21 of the cover 20. The portions 21d and 21d are integrally formed to project. Cylindrical locking projections (positioning locking portions) 21e and 21e are integrally formed so as to be symmetric with respect to the upper and lower sides of the pair of contact portions 21d and 21d with the through holes 22a interposed therebetween.

  As shown in FIGS. 2 and 3, the brush holder 30 has a disc-shaped brush holder main body 31 made of a substantially synthetic resin that holds a pair of brushes 34, 34. A circular through hole 31 a is formed in the center of the brush holder body 31. A pair of box-shaped brush storage portions 32, 32 are formed on the left and right sides of the brush holder main body 31 with the through holes 31a facing each other. A brush 34 is housed in each brush housing portion 32 so as to be able to move in and out. The brush 34 is pressed and urged by a torsion coil spring (biasing means) (not shown) so as to come into contact with the commutator piece 17a of the commutator 17. Yes. Further, at a position away from each brush storage portion 32 that is a symmetrical position with the through hole 31a on the front surface of the brush holder body 31, that is, at a position facing the pair of locking projections 21e, 21e of the cover 20. An engagement concave portion (positioning engagement portion) 33 formed of a rib 33a protruding in an annular shape is formed. Each engagement recess 33 is adapted to be fitted with each cylindrical locking projection 21 e of the cover 20.

  As shown in FIG. 2, a pair of projecting pieces 31b and 31b are integrally formed on both the upper and lower sides of the brush holder main body 31 of the brush holder 30, respectively. The pair of protruding pieces 31b and 31b are held between the opening end 11c on the front side of the yoke 11 and the end 21g of the cylindrical wall portion 21 of the cover 20, and the pair of protruding pieces 31b and 31b. Is held by each recess 21h of the end 21g of the cylindrical wall portion 21 of the cover 20 for positioning. Thereby, the brush holder main body 31 is sandwiched and fixed between the opening end 11 c on the front side of the yoke 11 and the end portion 21 g of the cylindrical wall portion 21 of the cover 20.

  Further, as shown in FIGS. 2, 3, and 7, a terminal fixing hole portion (terminal mounting portion) 31c into which a base portion 35a of one terminal 35 is fitted is formed on the upper portion of the brush holder body 31 of the brush holder 30. And a boss-like welded portion (terminal mounting portion) 31d that is thermally welded through the round holes of the base portions 36a of the four terminals 36 are integrally formed. As shown in FIGS. 5 to 7, each of the terminals 35 and 36 penetrates through a terminal through hole 24 a formed in the bottom wall 24 of the connector portion 23 of the cover 20 and protrudes into the connector portion 23 by a predetermined length. . Further, as shown in FIG. 7, convex portions 35c and 36c having notches 35d and 36d are formed in the middle portions 35b and 36b of the terminals 35 and 36, respectively. Then, the notches 35d and 36d of the convex portions 35c and 36c of the terminals 35 and 36 are respectively fitted to terminal holders 40 described later that are detachably attached to the concave terminal holder storage portion 25 of the cover 20. It has become. The notches 35d and 36d of the convex portions 35c and 36c of the terminals 35 and 36 are positioned in front of the terminal through hole 24a formed in the bottom wall 24 of the connector portion 23 of the cover 20 in the insertion direction.

  As shown in FIGS. 2 and 6 to 8, the terminal holder (power feeding component) 40 has a terminal holder body 41 made of synthetic resin. The terminal holder main body 41 is formed in the concave terminal holder from the upper surface opening of the concave terminal holder storage portion 25 so as to be orthogonal to the terminals 35 and 36 formed on the back side of the bottom wall 24 of the connector portion 23 of the cover 20. It fits in the accommodating part 25, and it fits in the some terminals 35 and 36, respectively.

  As shown in FIGS. 2, 6 and 8, flexible arms 42 and 42 are integrally formed on both sides of the terminal holder main body 41, respectively. An elastic claw (engagement) that is detachably locked to the flanges (locking portions) 25b formed on both side walls 25a and 25a of the terminal holder storage portion 25 is provided in the middle portion 42a of each flexible arm 42. A pawl) 43 is formed to project integrally. Further, as shown in FIG. 8, a jig mounting hole 44 for a removal jig is formed in the thick part 42b at the tip of each flexible arm 42. As shown in FIG. 5, the jig mounting holes 44 of the flexible arms 42 are exposed from the openings 24 b and 24 b formed on both lower sides of the bottom wall 24 of the connector portion 23 of the cover 20. It has become. Further, on the bottom surface 41a of the terminal holder body 41, rod-like and T-shaped projections 45, 46, 47 that are locked to the notches 35d, 36d of the convex portions 35c, 36c of the terminals 35, 36 are integrally projected. It is formed.

  As shown in FIG. 6, the bottom wall 25 c of the concave terminal holder storage portion 25 formed on the back side of the bottom wall 24 of the connector portion 23 of the cover 20 has a convex portion 35 c of each terminal 35, 36. The contact portions 25d corresponding to 36c are integrally projected. Further, among the plurality of terminals 35, 36, the terminals 35, 36 on both sides are for motor driving (for power supply), and the inner three terminals 36, 36, 36 are for sensors (for detecting rotational position). is there. Further, as shown in FIGS. 1 and 4, a crimping piece portion 11 h is formed to protrude at a predetermined interval at the opening end 11 a on the rear side of the yoke 11. The cap 12 is fixed to the opening end 11 a on the rear side of the yoke 11 by caulking each caulking piece portion 11 h to each concave portion 12 c of the cap 12.

  According to the motor 10 of the above embodiment, as shown in FIG. 7, the cover 20 is placed in the notches 35 d and 36 d of the convex portions 35 c and 36 c formed in the middle portions 35 b and 36 b of the plurality of terminals 35 and 36. Since the projections 45, 46, 47 of the synthetic resin terminal holder 40 housed in the concave terminal holder housing part 25 of the connector part 23 are fitted, the intermediate parts 35b, 36b of the terminals 35, 36 are synthesized. The resin terminal holder 40 can be securely held. As a result, the long terminals 35 and 36 can be reliably prevented from being deformed or rattled, and the terminal holder 40 can securely apply stress when the mating connector 50 is attached to or detached from the connector portion 23 of the cover 20. Can receive.

  Further, as shown in FIG. 6, the synthetic resin terminal holder 40 housed in the concave terminal holder housing part 25 of the connector part 23 of the cover 20 is integrally formed on both sides of the terminal holder body 41. The elastic claws 43 of the intermediate portions 42a of the pair of flexible arms 42 and 42 are engaged with the flange portions 25b formed on the side walls 25a and 25a of the terminal holder storage portion 25. FIG. As shown, the jig mounting holes 44 of the pair of flexible arms 42 and 42 of the terminal holder 40 are openings 24 b and 24 b formed on both lower sides of the bottom wall 24 of the connector portion 23 of the cover 20. Since each of the flexible arms 42 is exposed from the openings 24b and 24b, a removal jig (not shown) is attached to the jig mounting hole 44 of each flexible arm 42 exposed from the openings 24b, 24b. If it is elastically deformed in the direction in which it is connected, the flanges 25b of the side walls 25a, 25a of the terminal holder housing 25 and the elastic claws 43 of the intermediate portions 42a of the pair of flexible arms 42, 42 of the terminal holder 40 The locked state can be easily released, and the terminal holder 40 can be easily removed from the terminal holder storage portion 25. That is, since the removal jig is inserted from the connector portion 23 and is not inserted into the terminal holder storage portion 25, the internal space of the terminal holder storage portion 25 can be saved. As a result, the entire cover 20 can be reduced in size.

  In addition, according to the said embodiment, although the case where the terminal holder was used as a power feeding component was demonstrated, of course, a power feeding component is not restricted to a terminal holder.

It is a perspective view which shows the motor of one Embodiment of this invention. It is a disassembled perspective view of the said motor. It is the perspective view which looked at the state before attaching the cover of the said motor from the cover side. It is the perspective view which looked at the state before attaching the cover of the said motor from the cap side. It is a front view of the motor. It is a longitudinal cross-sectional view of the terminal holder accommodating part of the said motor. It is a cross-sectional view of the connector part of the motor. It is a perspective view of the terminal holder used for the said motor.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Motor 11 Yoke 11c Open end 11e Inner peripheral surface 13 Magnet 17 Commutator 20 Cover (housing)
23 Connector portion 24 Bottom wall 24b Opening portion 25 Terminal holder storage portion 25b Hook portion (locking portion)
30 Brush holder 31a Through hole 32, 32 A pair of brush storage parts 34 Brush 35, 36 Terminal 35a, 36a Base part 35b, 36b Midway part 40 Terminal holder (power supply component)
42 Flexible arm 42b Thick part at the tip 43 Elastic claw 44 Jig mounting hole 50 Mating connector

Claims (3)

A yoke to which a magnet is fixed, a housing fixed to the open end of the yoke and containing a power supply component inside, and a brush holder which is housed in the housing and has a circular through hole through which a commutator passes in the center; And at least a pair of brush holders formed so as to sandwich the through-holes of the brush holder, and a latching portion is provided inside the housing, and the latching portion is provided with the power supply component. In the power feeding structure of the motor in which the elastic claw provided is locked and the power feeding component is attached inside the housing,
A power feeding structure for a motor, wherein a flexible arm formed with the elastic claws is provided on the power feeding component, and a jig mounting hole for a removal jig is formed at the tip of the flexible arm. A power feeding structure for a motor according to claim 1,
A bottomed cylindrical connector portion into which a mating connector for power supply is fitted is formed in the housing, and a base wall of a plurality of terminals projecting a predetermined length into the connector portion is passed through the bottom wall of the connector portion, and The terminal holder is formed with a concave terminal holder storage portion for holding the terminal holder as a power supply component and holding the terminal holder on the back side of the bottom wall of the connector portion. Locking portions to which elastic claws of the flexible arms provided on both sides of the terminal holder are detachably locked are formed on both side walls of the storage unit, respectively, and the distal ends of the flexible arms on both sides of the terminal holder are formed. A motor feed structure, wherein a jig mounting hole for a removal jig is formed in a thick part of the motor. A power feeding structure for a motor according to claim 2,
An electric power feeding structure for a motor, wherein an opening for exposing a jig mounting hole of the flexible arm is formed in the connector portion in a direction perpendicular to the housing direction of the power feeding component.

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