JP4875910B2 - Motor power feeding structure - Google Patents

Description

  The present invention relates to a power feeding unit structure of a motor suitable for use in, for example, a seat motor as a drive source for sliding a seat.

  As a power feeding unit structure of this type of motor, there is one shown in FIGS. 8 to 10 (see, for example, Patent Document 1).

  As shown in FIGS. 8 to 10, the motor 1 includes a metal-made cylindrical yoke 2 having a permanent magnet 3 fixed to an inner peripheral surface 2 a, and a screw 4 A on a flange portion 2 b on the opening end side of the yoke 2. A synthetic resin case 5 having a coupler receiving portion 5a that is fastened and fixed with a coupler 9 for power feeding, a brush holder 6 made of synthetic resin housed in the case 5, and the brush A pair of brushes 7 and 7 attached to face each other through the through-hole 6 a of the holder 6 and a pair of terminal holders 6 b of the brush holder 6, and a pair of brushes 6 disposed in the coupler receiver 5 a of the case 5. Terminals 8 and 8 are provided. As shown in FIG. 9, the brush holder 6 is fastened and fixed to the case 5 via screws 4B.

JP 2003-18790 A

  However, in the conventional power feeding part structure of the motor 1, the brush holder 6 needs to be fastened and fixed to the case 5 via the screws 4 </ b> B, so that the assembly work of the brush holder 6 to the case 5 is complicated.

  Accordingly, the present invention has been made to solve the above-described problems, and an object of the present invention is to provide a power feeding unit structure for a motor that can easily assemble a brush holder.

The invention of claim 1 includes a cylindrical yoke having a magnet fixed to the inner peripheral surface thereof, a case having a coupler receiving portion fixed to the open end of the yoke and to which a mating coupler for power feeding is fitted, In a power feeding part structure of a motor provided with a brush holder housed in a case and a terminal provided in the brush holder and disposed in a coupler receiving part of the case, the brush holder is a holder main body for holding a brush And a terminal holding portion for disposing the terminal in the coupler receiving portion, and a pair of protruding pieces that are clamped and fixed between the yoke and the case are formed on the holder body , A protrusion for positioning the case and the holder body is formed by being held between the pair of protruding pieces .

  According to a second aspect of the present invention, there is provided a power feeding portion structure for a motor according to the first aspect, wherein a locking portion is formed in a terminal holding portion of the brush holder, and the locking portion is engaged with a coupler receiving portion of the case. It is characterized by being locked to the part.

  According to a third aspect of the present invention, there is provided a power feeding structure for a motor according to the first or second aspect, wherein the terminal of the brush holder is held on the bottom side of the coupler receiving portion of the case supported by the terminal holding portion. The terminal is exposed outside the end face, and the exposed portion of the terminal is in contact with the bottom of the coupler receiving portion of the case.

As described above, according to the first aspect of the present invention, the brush holder has a holder main body for holding the brush, and a terminal holding portion for disposing the terminal in the coupler receiving portion, and the holder main body includes the yoke and the case. The brush holder can be easily assembled and fixed to the yoke. That is, the protrusions of the case are held between the pair of projecting pieces of the holder body, so that the brush holder and the case can be easily positioned, and the pair of projecting pieces are connected to the yoke and the case. It can be easily held and fixed in between. Thereby, positioning with a brush holder and a case and fixation between the yoke and case of a brush holder can be performed easily and reliably.

  According to the second aspect of the present invention, the locking portion is formed in the terminal holding portion of the brush holder, and the locking portion is locked to the engaging portion of the coupler receiving portion of the case. The terminal holding part of the brush holder can be easily locked and fixed.

  According to the invention of claim 3, the bottom side of the coupler receiving portion of the terminal case supported by the terminal holding portion is exposed outside the end face of the terminal holding portion of the brush holder, and the exposed portion of the terminal is exposed to the coupler of the case. By contacting the bottom part of the receiving part, when the mating coupler for power feeding is inserted into the coupler receiving part of the case and fitted, the load can be received by the coupler receiving part. The terminal is not affected by stress.

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

  FIG. 1 is a sectional 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 an enlarged exploded perspective view of the main part of the motor, and FIG. 5 is an exploded side view of the motor, FIG. 6 is a rear view of a cover used for the motor, and FIG. 7 is a cross-sectional view taken along line XX in FIG.

  As shown in FIGS. 1, 2, 4, and 5, the motor 10 is fixed by caulking to a metal-made cylindrical yoke 11 having both ends opened and an opening 11 b on one end 11 a side of the yoke 11. A synthetic resin cap 13, a synthetic resin box-shaped cover (case) 15 fixed by crimping to the opening 11 d on the other end 11 c side of the yoke 11, and the other ends (open ends) of the yoke 11. The synthetic resin brush holder 30 is sandwiched and fixed between the cover 11 and the cover 15 and is used as, for example, a drive source of a seat slide mechanism for sliding a vehicle seat.

  As shown in FIGS. 1 and 4, a pair of magnets 12 and 12 are fixed to the inner peripheral surface 11 e of the cylindrical yoke 11 via an adhesive or the like. Further, a circular through hole 13a is formed in the center of the cap 13, and a bearing 14 is disposed inside the surrounding cylindrical portion 13b. Further, a circular through hole 15a is formed in the center of the cover 15, and a bearing 19 is fitted inside the cylindrical portion 15b around the circular through hole 15a. The pair of bearings 14 and 19 support both ends 20a and 20b of a double-sided output shaft type armature shaft 20 rotatably. A square hole 20c is formed in the center of each end face of both ends 20a and 20b of the armature shaft 20. Each square hole 20c is connected to a rod-like cable or the like of a seat slide mechanism (not shown).

  As shown in FIGS. 1 and 4, an armature 21 is attached at a position facing the pair of magnets 12, 12 of the armature shaft 20. The armature 21 is composed of an armature core 22 fixed to the armature shaft 20 and having a coil winding portion 22a having a predetermined number of slots, and an armature coil 23 wound around the coil winding portion 22a of the armature core 22. Has been. Furthermore, a commutator 24 is fixed at a position facing the opening 11 d on the other end 11 c side of the yoke 11 of the armature shaft 20. The commutator 24 includes the same number of commutator pieces 24 a as the coil winding portions 22 a of the armature core 22. Each commutator piece 24a and one end 23a of the armature coil 23 are electrically connected to each other by a fusing method by a claw 24b formed on the commutator piece 24a. As shown in FIG. 1, a washer 25 and a collar sleeve 26 are interposed between the bearing 14 at one end 20 a of the armature shaft 20 and the coil winding portion 22 a of the armature core 22. A washer 28 and an annular elastic body 29 are interposed between the bearing 19 and the stop ring 27 at the other end 20 b of the armature shaft 20.

  As shown in FIGS. 1 to 5, a substantially disc-shaped brush holder 30 made of synthetic resin is accommodated in a cover 15 fixed to the other end 11 c of the yoke 11 by caulking. As shown in FIGS. 1 to 7, the cover 15 is integrally formed with a cylindrical portion 16 that houses the brush holder 30 and an upper portion of the cylindrical portion 16, and is fitted with a mating coupler 40 for feeding. The cylindrical coupler receiving portion 17 and the cylindrical portion 16 and the bottom wall portion 18 forming the bottom of the coupler receiving portion 17 are formed in a box shape. A circular through hole 15 a is formed in the center of the bottom wall portion 18 of the cylindrical portion 16 of the cover 15. A pair of upper and lower step portions 16 a and 16 b are formed on both outer sides of the cylindrical portion 16 of the cover 15. A pair of upper and lower caulking pieces 11g and 11h formed on both sides of the other end 11c of the yoke 11 are caulked and locked to the pair of upper and lower step portions 16a and 16b. . As a result, the cover 15 receives and holds the brush holder 30 and is fixed to the other end 11 c of the yoke 11.

  Further, as shown in FIGS. 2, 3, 6, and 7, peripheral portions 31 c and 31 c on both sides of the brush holder 30 are located at opposite positions on the inner peripheral surface (inner surface) 16 c of the cylindrical portion 16 of the cover 15. A pair of abutting portions 16d, 16d that abut against each other are integrally projected. A concave portion 16e is formed at the center of each contact portion 16d, and a rib (beam portion) 16f is integrally formed at the center of the concave portion 16e.

  As shown in FIGS. 1 to 5, the brush holder 30 includes a substantially disc-shaped holder main body 31 that holds a pair of brushes 35, 35, and an upper part of the holder main body 31. And a terminal holding portion 32 having an L-shaped side surface for arranging the power supply terminals) 36 and 36 in the coupler receiving portion 17. A circular through hole 31 a is formed in the center of the holder main body 31 of the brush holder 30. A pair of box-shaped brush storage portions 31b and 31b are formed on the left and right sides of the opposed positions of the through holes 31a of the holder body 31. The brushes 35 are housed in the brush housing portions 31b so as to be able to move in and out, and the brushes 35 are pressed and urged to come into contact with the commutator piece 24a of the commutator 24 by a torsion coil spring (biasing means) (not shown). Yes. In addition, a pair of peripheral edge portions 31c and 31c are integrally formed on the outside of the pair of brush housing portions 31b and 31b of the holder main body 31 of the brush holder 30 in a tongue shape. The pair of peripheral portions 31 c and 31 c are in contact with a pair of contact portions 16 d and 16 d formed on the inner peripheral surface 16 c of the cylindrical portion 16 of the cover 15.

  Further, as shown in FIGS. 1 to 5, a pair of projecting pieces 31 d and 31 d are integrally formed on the lower portion of the holder main body 31 of the brush holder 30. The pair of projecting pieces 31d, 31d are sandwiched between the lower end 11c of the yoke 11 and the end 16g of the cylindrical portion 16 of the cover 15, and the pair of projecting pieces 31d, 31d The cylindrical portion 16 is sandwiched and positioned by the protrusion 16h of the end portion 16g. Thereby, the holder main body 31 is sandwiched and fixed between the other end 11 c of the yoke 11 and the end portion 16 g of the cylindrical portion 16 of the cover 15. Further, a cylindrical portion 31e for accommodating the circuit breaker 38 is integrally formed on the upper portion of the holder body 31 of the brush holder 30, and a flat trapezoidal protruding piece 31f is integrally formed on the upper portion thereof. This protruding piece 31f is adapted to fit into a recess 11i formed on the upper side of the other end 11c of the yoke 11.

  Further, the terminal holding portion 32 of the brush holder 30 is formed in an L-shaped side surface by a coupler mounting portion 32a and an upright portion 32b that protrudes vertically upward from the rear end of the coupler mounting portion 32a. A pair of projecting portions 32c and 32c for sliding the mating coupler 40 are integrally formed on both sides of the terminal holding portion 32 on the coupler mounting portion 32a. Further, on the standing portion 32b of the terminal holding portion 32, the tip portions 36a of the pair of terminals 36, 36 for power feeding are arranged so as to extend through from behind. The middle part 36b, the base part 36c, and the base end part 36d of each terminal 36 supported by the standing part 32b of the terminal holding part 32 are bent to form the back surface (end face) 32d of the standing part 32b of the terminal holding part 32. And the back surface of the coupler mounting portion 32 a and the holder main body 31. The midway part 36 b of the terminal 30 is arranged so as to stand upright in the direction perpendicular to the standing part 32 b of the terminal holding part 32, and a part thereof is exposed from the back surface (end face) 32 d of the terminal holding part 32. The brush holder 30 of the terminals 36 and 36 is fixed to the brush holder 30 by heat-clamping a protrusion 31g provided on the holder body 31 fitted to the terminals 36 and 36. It is also possible to insert-mold when fixing the terminal to the brush holder. As shown in FIG. 1, the midway portion 36 b exposed outside the back surface 32 d of the standing portion 32 b of the terminal holding portion 32 of each terminal 36 is a convex portion 18 a of the bottom wall portion 18 of the coupler receiving portion 17 of the cover 15. It comes to contact with. As shown in FIG. 4, the base end portion 36d of each terminal 36 extends to each brush storage portion 31b and is connected to each brush 35 via a pigtail wire (not shown). As a result, a current is supplied to each brush 35 via each terminal 36, and this current flows to the armature 21 so that the armature shaft 20 rotates. One terminal 36 is connected to the brush 35 via a circuit breaker 38.

  Furthermore, as shown in FIGS. 1-5, the latching claw (locking part) 33 is integrally formed in the center of the upper part of the standing part 32b of the terminal holding part 32. As shown in FIG. The locking claw 33 is locked to a rectangular notch hole (engagement portion) 17 a of the coupler receiving portion 17 of the cover 15.

  As shown in FIGS. 1, 2, and 4, a crimping piece portion 11 f is projected and formed at one end 11 a of the yoke 11 at predetermined intervals. The cap 13 is fixed to the one end 11 a of the yoke 11 by caulking each caulking piece portion 11 f to each concave portion 13 c of the cap 13.

  According to the power feeding structure of the motor 10 of the above embodiment, the holder body 31 and the terminal holding portion 32 of the brush holder 30 are accommodated in the cylindrical portion 16 and the coupler receiving portion 17 of the cover 15, and the cylindrical portion 16 of the cover 15 is accommodated. When the pair of upper and lower caulking pieces 11g and 11h formed on both sides of the other end 11c of the yoke 11 are caulked and locked to the pair of upper and lower stepped portions 16a and 16b on both outer sides of the holder, the holder of the brush holder 30 A pair of projecting pieces 31d, 31d at the lower part of the main body 31 is held between the lower side of the other end 11c of the yoke 11 and the end 16g of the cylindrical part 16 of the cover 15, and the upper projecting pieces of the holder main body 31 31f fits into a recess 11i formed on the upper side of the other end 11c of the yoke 11. Thereby, the holder main body 31 of the brush holder 30 is clamped and fixed between the other end 11 c of the yoke 11 and the end portion 16 g of the cylindrical portion 16 of the cover 15. At this time, the pair of peripheral portions 31 c and 31 c on both sides of the holder main body 31 of the brush holder 30 abut on the pair of abutting portions 16 d and 16 d of the inner peripheral surface 16 c of the cylindrical portion 16 of the cover 15, and a terminal of the terminal 36. A midway part 36 b exposed to the outside from the back surface 32 d of the standing part 32 b of the holding part 32 abuts on the convex part 18 a of the bottom wall part 18 of the coupler receiving part 17 of the cover 15.

  Thus, the holder body 31 of the brush holder 30 is clamped and fixed between the other end 11 c of the yoke 11 and the end portion 16 g of the cylindrical portion 16 of the cover 15, so that the brush holder 30 can be easily assembled to the yoke 11. Can be fixed.

  Further, the latching claw 33 is formed in the terminal holding part 32 of the brush holder 30, and the latching claw 33 is latched in the notch hole 17 a of the coupler receiving part 17 of the cover 15, whereby the coupler receiving part 17 of the cover 15. The terminal holding part 32 of the brush holder 30 can be easily locked and fixed.

  Further, the intermediate part 36 b of the terminal 36 is exposed from the standing part 32 b of the terminal holding part 32, and the exposed intermediate part 36 b is brought into contact with the convex part 18 a of the bottom wall part 18 of the coupler receiving part 17 of the cover 15. When the power supply counterpart coupler 40 is inserted into the coupler receiving portion 17 of the cover 15 and fitted, the load can be reliably received only by the coupler receiving portion 17. For this reason, the terminal 36 itself is not affected by the stress when the mating coupler 40 is inserted. In addition, since the middle part 36b of the terminal 36 stands up and is disposed on the terminal holding part 32, the exposed part of the middle part 36a of the terminal 30 can be reliably secured without being affected by variations in the dimensions of the brush holder 30. Is formed.

  In addition, according to the said embodiment, although the case where the motor was applied to the seat motor as a drive source which slides the seat of a vehicle was demonstrated, you may apply the said embodiment to motors other than a seat motor. Of course. Also, the terminal holding part of the brush holder is provided with a locking claw as a locking part, and the coupler receiving part of the cover is provided with a notch hole as an engaging part for locking the locking claw. Instead, for example, a locking convex portion may be provided, and for example, an engaging concave portion may be provided instead of the notch hole.

It is sectional drawing which shows the motor of one Embodiment of this invention. It is a disassembled perspective view of the said motor. It is an expansion disassembled perspective view of the principal part of the said motor. It is the disassembled perspective view which looked at the said motor from the cover side. It is a disassembled side view of the said motor. It is a rear view of the cover used for the motor. It is sectional drawing which follows the XX line in FIG. It is a top view of the conventional motor. It is a front view which shows the state which attached the brush holder to the case of the said conventional motor. It is a side view which shows the said conventional brush holder in a partial cross section.

Explanation of symbols

10 Motor 11 Yoke 11c The other end (open end)
11e Inner peripheral surface 12 Magnet 15 Cover (case)
17 Coupler receiving part 17a Notch hole (engagement part)
18 Bottom wall (bottom)
18a Convex (bottom)
30 Brush holder 31 Holder body 32 Terminal holding part 33 Locking claw (locking part)
35 Brush 36 Terminal 36b Middle part (exposed part)
40 Counter coupler

Claims (3)

A cylindrical yoke having a magnet fixed to the inner peripheral surface, a case having a coupler receiving portion that is fixed to the open end of the yoke and into which a mating coupler for power feeding is fitted, and a brush accommodated in the case In a power feeding part structure of a motor provided with a holder and a terminal provided in the brush holder and disposed in the coupler receiving part of the case,
The brush holder includes a holder main body for holding a brush and a terminal holding portion for arranging the terminal in the coupler receiving portion, and the holder main body is a pair of clamped and fixed between the yoke and the case. And a projecting portion for positioning the case and the holder main body by being sandwiched between the pair of projecting pieces . It is the electric power feeding part structure of the motor of Claim 1, Comprising:
An electric power feeding portion structure for a motor, wherein an engaging portion is formed in a terminal holding portion of the brush holder, and the engaging portion is engaged with an engaging portion of a coupler receiving portion of the case. A power feeding structure for a motor according to claim 1 or 2,
The bottom side of the coupler receiving portion of the case supported by the terminal holding portion is exposed outside the end surface of the terminal holding portion of the brush holder, and the exposed portion of the terminal is exposed to the bottom portion of the coupler receiving portion of the case. A structure of a power feeding portion of a motor characterized by being in contact.

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