JPH11146594A - Small motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a small motor having a simple construction, without the use of adhesion or double forming or the like for a gear case cover. SOLUTION: By fitting a cylindrical portion 13d of a hub 13 and an output gear 13e which are inserted to a gear case cover 14, a waterproof member attaching portion is formed by the gear case cover 14 and a waterproof member supporting cap 15, a cover side bonding portion under pressure 16a which is bonded elastically to the waterproof member attaching portion 43 is formed by fitting to the waterproof member attaching portion 43, and also a waterproof member 16 to be bonded to the cylindrical portion 13d of the hub 13 is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a small motor used for a power window device and a sunroof device of an automobile.

[0002]

2. Description of the Related Art As a small motor used in a power window device or a sunroof device of an automobile, an armature shaft provided on an armature is rotated, and a wheel gear is rotated by a worm provided on the armature shaft. The rotational force of the wheel gear is transmitted to the hub coupled to the damper via the accommodated damper, and the output gear formed on the hub rotates, and the window elevating means and the sunroof device of the power window device coupled to the output gear The roof lid moving means operates. The wheel gear is housed in a gear housing formed in the gear case, and the output gear is arranged to protrude outward from a gear case cover covering the gear housing.

[0003]

In the above-mentioned small motor, for example, waterproofing is performed by bonding a waterproof member to a portion of the gear case cover through which the hub is inserted.
For this reason, it is necessary to perform an operation for bonding the waterproof member to the gear case cover, so that there is a problem that the number of steps is increased, and if the bonding is insufficient, the waterproof cannot be reliably performed. Had the problem that it required skill.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a small motor having a simple structure without using an adhesive for attaching a waterproof member.

[0005]

Configuration of the Invention

[0006]

According to a first aspect of the present invention, there is provided a small motor, a motor case, a gear case fixed to an end of the motor case, a magnet disposed inside the motor case, and a load. An armature that has an armature shaft that is coupled and that rotates forward on the inner circumference of the magnet when energized in the forward direction and reversely rotates on the inner circumference of the magnet when energized in the reverse direction, and is placed in the gear housing formed in the gear case A pivot shaft, a wheel gear rotatably supported by the pivot shaft, meshing with a worm provided on the armature shaft, a damper housed in the wheel gear, and a damper coupling portion coupled to the damper. A hub having a cylindrical portion protruding in the axial direction of the pivot shaft and through which the pivot shaft is inserted, the hub having an output gear formed in the cylindrical portion, and a gear housing of a gear case. A gear case cover that covers the housing, and has a first hub insertion hole through which the hub cylindrical portion and the output gear are inserted, and a waterproof member that is fitted to the gear case cover to form a waterproof member mounting portion with the gear case cover. A member supporting cap and a cover-side crimping portion which has a pair of annular protrusions in the outer edge portion in the axial direction of the pivot shaft and is elastically crimped to the waterproofing member mounting portion by being fitted into the waterproofing member mounting portion are formed. In addition, the inner edge portion is provided with a waterproof member that presses against the cylindrical portion of the hub.

In the small motor according to a second aspect of the present invention, the gear case cover is formed with a boss protruding in the axial direction of the pivot shaft from a cover body provided on the gear case cover, and the boss is provided with a cylindrical portion of the hub. A first hub insertion hole to be inserted and a first waterproof member fitting portion are formed, a waterproof member supporting cap is fixed to the boss, and the waterproof member attaching portion is fitted with the first waterproof member fitting portion of the boss. It is characterized by comprising a fitting portion and a second waterproofing member fitting portion formed on the waterproofing member support cap opposite to the first waterproofing member fitting portion.

According to a third aspect of the present invention, in the small-sized motor, the waterproof member has, at the inner edge, an inner diameter smaller than the outer diameter of the hub cylindrical portion, and is disposed in the cylindrical direction of the hub cylindrical portion. A plurality of annular lips which are press-fitted to the cylindrical portion, wherein the waterproof member is provided between the first waterproof member fitting portion of the gear case cover and the second waterproof member fitting portion of the waterproof member supporting cap. Is characterized in that it is configured to be elastically deformable so that a valley between the annular projections is reduced by being fitted into the annular projection.

In the small motor according to a fourth aspect of the present invention, the waterproof member supporting cap is formed with a second hub insertion hole through which the cylindrical portion of the hub is inserted, and the outer side of the second hub insertion hole. And a boss-side fitting portion to be mounted on the boss of the gear case cover is formed on the boss of the gear case cover, and the boss side of the waterproof member supporting cap is formed on the boss of the gear case cover. The present invention is characterized in that a cap fixing portion in which the fitting portion is fitted inside is formed.

[0010]

In the small motor according to the first aspect of the present invention, the waterproof member is fixed to the waterproof member mounting portion formed by fitting the waterproof member supporting cap to the gear case cover. In the waterproof member, the pair of annular protrusions of the cover-side crimping portion are elastically crimped to the waterproofing member mounting portion at the outer edge portion and the inner edge portion is crimped to the cylindrical portion of the hub, so that the gear case cover and the hub are separated. Waterproof between them. Therefore, there is no need to bond the waterproof member to the gear case cover.

In the small motor according to the second aspect of the present invention, when the waterproof member supporting cap is fitted to the boss of the gear case cover, the waterproof member has a first waterproof member fitting portion of the boss and the waterproof member. The supporting cap is sandwiched and fixed by the second waterproof member fitting portion. Therefore, in addition to the effect of the first aspect, the waterproof member can be attached only by fitting the waterproof member supporting cap to the boss of the gear case cover.

In the small motor according to the third aspect of the present invention, the waterproof member is resilient so that the valley between the annular projections is reduced by fitting the waterproof member supporting cap to the boss of the gear case cover. The elastic lip is elastically attached to the waterproof member attaching portion by the elastic repulsive force accumulated when elastically deformed, and the plurality of annular lips are pressed against the cylindrical portion of the hub. Therefore, in addition to the function of claim 2,
Even if the small motor is subjected to vibration or the like, the annular projection sandwiching the valley attenuates the vibration or the like at that time and does not impair the crimping performance between the annular lip and the cylindrical portion of the hub.

[0013] In the small motor according to the fourth aspect of the present invention, the waterproof member supporting cap has the boss-side fitting portion fitted to a cap fixing portion formed on the boss of the gear case cover, thereby waterproofing the waterproof member. It is arranged on the member mounting part. Therefore, in addition to the function of the second or third aspect, the cap for supporting the waterproof member is simply attached to the gear case cover without any complicated attaching means.

[0014]

1 to 7 show one embodiment of a small motor according to the present invention.

The illustrated small motor 1 mainly includes a motor case 2, a gear case 3, a first magnet 4,
, Armature 6, holder base 7, first brush 8, second brush 9, pivot shaft 10, wheel gear 11, damper 12, hub 13, gear case cover 1
4. A waterproof member supporting cap 15 and a waterproof member 16 are provided.

The motor case 2 is formed using a conductive metal as a raw material. One end of a cylindrical motor case body 2a is opened in the motor case 2, and the other end of the motor case body 2a is opened. A closed case end 2b is formed in the portion, and a first bearing 17 is fixed inside the case end 2b.

In the motor case 2, one end of the opened motor case main body 2 a is connected to the gear case 3 by screws 18, 18.
Screwed. In addition, the motor case 2 is provided near one end of the opened motor case body 2a,
First terminal connecting portion 2 protruding in the shape of a small protrusion on the inner peripheral side
c, the second terminal connection 2d is formed as a pair, and the first and second terminal connection 2c, 2d
A first holder base supporting portion 2e, a second holder base supporting portion
f is formed as a pair. The first and second terminal connection portions 2c and 2d are formed in a projecting shape by being pressure-formed from outside the motor case main body 2a. The first and second terminal connection portions 2c and 2d are electrically connected to first and second motor case connection terminals 19 and 20 on a holder base 9 described later. The first and second holder base support portions 2e and 2f support a holter base 9 described later in the gear case 3.

The motor case 2 includes a motor case main body 2a.
A first magnet 4 and a second magnet 5 are attached to the inside of the inside. The first and second magnets 4 and 5 generate mutually opposing magnetic forces on the inner peripheral side.

An armature 6 is disposed inside the first and second magnets 4 and 5. Armature 6
Has an armature shaft 21, an armature core 2
2, a commutator 23 and an armature coil 24 are provided.

The armature shaft 21 has the other end of the shaft main body 21a inserted through the first bearing 17, and one end of the shaft main body 21a inserted through the second bearing 25 attached to the gear case 3 described later. A worm 21b is formed at one end protruding into the inside 3.

The armature core 22 is fixed substantially at the center of the shaft main body 21a of the armature shaft 21. The armature core 22 has a number of winding portions 22a corresponding to the number of slots.

The commutator 23 is fixed near the armature core 22. The same number of commutator pieces 23a as the winding portions 22a of the armature core 22 are provided on the outer peripheral portion of the commutator 23, respectively.
The armature coil 24 is connected to the commutator 2
3 are electrically connected to the commutator pieces 23a, respectively, and then wound around the winding portions 22a of the armature core 22, respectively. The holder base 7 is arranged outside the commutator 23 of the armature 6.

As shown in FIG. 4, in the holder base 7, a commutator hole 7b having an inner diameter larger than the outer diameter of the commutator 23 is formed at the center of the holder base body 7a formed in an oval shape. The armature shaft 21 and the commutator 23 are inserted into the commutator hole 7b.

As shown in FIG. 4, a first brush case 7 is provided on the holder base body 7a.
c, a second brush case 7d, a first choke coil housing 7e, a second choke coil housing 7f, a first capacitor housing 7g, a second capacitor housing 7h, and a first motor case connection. A terminal mounting portion 7i, a second motor case connecting terminal mounting portion 7j, and a circuit breaker accommodating portion 7k are provided.

The first and second brush cases 7c and 7d are
They are arranged facing each other with the commutator hole 7b as the center. The first brush 8 and the first brush spring 27 to which the first pigtail 26 is electrically connected are accommodated in the first brush case 7c, respectively, and the first brush 8 and the first brush spring 27 are located on the opposite side to the commutator hole 7b. The first brush 8 is arranged so as to be able to be pushed toward the center of the commutator hole 7b by fitting the stopper 28 of FIG. On the other hand, the second brush 9 electrically connected to the second pigtail 29 and the second brush spring 3 are provided in the second brush case 7d.
0 are accommodated, and the second brush 9 is disposed so that the second brush 9 can be pushed toward the center of the commutator hole 7b by fitting the second stopper 31 on the side opposite to the commutator hole 7b. The first pigtail 26 is electrically connected to one end of the first choke coil 32,
The pigtail 29 is electrically connected to one end of the second choke coil 33.

The first and second choke coil receiving portions 7e,
7f is arranged facing the commutator hole 7b.

The first choke coil accommodating portion 7e has a cylindrical shape, and contains the first choke coil 32 inside. The other end of the first choke coil 32 is electrically connected to a first holder base terminal 34 shown in FIG. 7 on the back side of the holder base body 7a. The first holder base terminal 34 is held on the back surface side of the holder base body 7a, and an external connection portion (female) 34a is formed at an end of the first holder base terminal 34.

The second choke coil accommodating portion 7f has a cylindrical shape in the same manner as the first choke coil accommodating portion 7e, and the second choke coil 33 is accommodated inside. The other end of the second choke coil 33 is electrically connected to the second holder base terminal 35 shown in FIG. 7 on the back side of the holder base body 7a.

First and second capacitor housings 7g, 7h
Are arranged facing each other around the commutator hole 7b.

The first capacitor accommodating portion 7g is formed in a rectangular hole shape, and the first capacitor 36 is accommodated in the first capacitor accommodating portion 7g. As shown in FIG. 7, the first capacitor 36 has one lead portion 36a electrically connected to the first holder base terminal 34 together with the other end of the first choke coil 32 on the back side of the holder base body 7a. And the other lead portion 36b is connected to the first
Of the motor case connecting terminal 19
Is electrically connected to the capacitor connection portion 19a of the first stage.

The second capacitor accommodating portion 7h is formed in a rectangular hole shape like the first capacitor accommodating portion 7g, and the second capacitor 37 is accommodated in the second capacitor accommodating portion 7h. ing. Second capacitor 37
As shown in FIG. 7, one of the lead portions 37a is connected to the second choke coil 3 on the back side of the holder base body 7a.
3 is electrically connected to the second holder base terminal 35 together with the other end, and the other lead portion 37b is electrically connected to the second capacitor connection portion 20a formed on the second motor case connection terminal 20. It is connected.

The first and second motor case connecting terminal mounting portions 7i and 7j of the holder base body 7a are arranged to face each other with the commutator hole 9b as a center.

A first motor case connection terminal 19 is attached to the first motor case connection terminal mounting portion 7i.
Has been fixed. The first motor case connection terminal 19 has a first capacitor connection portion 19a disposed on the back side of the holder base body 7a, and is bent from the first capacitor connection portion 19a to the front side of the holter base body 7a. First motor case connecting portion 19b formed by
The first capacitor connecting portion 19a is connected to the first capacitor 36 on the back side of the holder base body 7a.
Is electrically connected to the other lead portion 36b, and the first motor case connection portion 19b is disposed on the front side of the holder base body 7a on a plane parallel to the surface of the holder base body 7a. The first motor case connection portion 19b is
As shown in FIG. 4, since the motor case 2 is arranged on one top of the outer edge of the holder base body 7 a, the first case of the motor case 2 is fixed to the gear case 3.
And is electrically connected to the terminal connecting portion 2c.

The second motor case connection terminal mounting portion 7j is provided with a second motor case connection terminal 20.
Has been fixed. The second motor case connection terminal 20 has a second capacitor connection portion 20a disposed on the back surface side of the holder base body 7a, and is bent from the second capacitor connection portion 20a to the front surface side of the holter base body 7a. Motor case connecting portion 20b formed by
The second capacitor connecting portion 20a is connected to the second capacitor 37 on the back side of the holder base body 7a.
Is electrically connected to the other lead portion 37b, and the second motor case connection portion 20b is disposed on the surface side of the holder base body 7a on a surface parallel to the surface of the holder base body 7a. The second motor case connection portion 20b is
As shown in FIG. 4, since the motor case 2 is arranged on the other top of the outer edge of the holder base main body 7 a, the second case of the motor case 2 is fixed to the gear case 3.
And is electrically connected. At this time, the first motor case connecting portion 19b is arranged on the surface side of the holder base main body 7a on the surface parallel to the surface of the holder base main body 7a, and the second motor case connecting portion 20b is connected to the holder base main body 7a. Since the motor case 2 is disposed on a surface parallel to the surface of the holder base body 7a on the front surface side, when the motor case 2 is assembled to the gear case 3, the first and second terminal connection portions 2c, 2d of the motor case 2 are provided.
The first and second motor case connection terminals 1
9 and 20 are pressed toward the gear case 3 side,
Holder base 9 is positioned with respect to gear case 3 and motor case 2.

As shown in FIG. 4, the circuit breaker accommodating portion 7k of the holder base body 7a is formed in a square hole between the first capacitor accommodating portion 7g and the second brush case 7d. A circuit breaker 38 is housed in the circuit breaker housing 7k.
As shown in FIG. 7, one lead 38a of the circuit breaker 38 is electrically connected to the second holder base terminal 35, and the other lead 38b of the circuit breaker 38 is connected to the third holder base terminal. 39 is electrically connected. The third holder base terminal 39 is held on the back side of the holder base body 7a, and as shown in FIG. 7, an external connection portion (female) 39a is formed at an end of the third holder base terminal 39. Have been. The third holder base terminal 39, together with the first holder base terminal 34, is electrically connected to an external control circuit in a connector 44 fixed to the gear case 3.

In the holder base 7, an energization path to the commutator 23 leading to the first holder base terminal 34, the first choke coil 32, the first pigtail 26, and the first brush 8 is formed. Brush 8, first choke coil 32, first capacitor 36, first
Motor case connection terminal 19, motor case 2
Is formed, while passing through a third holder base terminal 39, a circuit breaker 38, a second holder base terminal 34, a second choke coil 33, a second pigtail 29, and a second brush 9. Commutator 2
3, a second brush 9, a second choke coil 33, a second capacitor 3
7. A radio wave path leading to the second motor case connection terminal 20 and the motor case 2 is formed. Therefore, radio noise (radio noise) generated when the first and second brushes 8 and 9 come into contact with or separate from the commutator piece 23a of the commutator 23 is shielded by the motor case 2 and the noise current is reduced. Flows through the motor case 2 and is returned to the source.

A ring-shaped elastic member 40 is fitted to the holder base 7 on the back side of the holder base body 7a. Since the elastic member 40 is arranged outside the holder base accommodating portion 3a formed in the gear case 3, when the motor case 2 is assembled to the gear case 3, the width of the motor case 2 in the cylindrical direction is reduced. The holder base body 7a is pressed against the first and second terminal connection portions 2c and 2d of the motor case 2 by the elastic restoring force. Thus, the first and second motor case connection terminals 19 and 20 on the holder base 7 are brought into press contact with the first and second terminal connection portions 2c and 2d of the motor case 2 to ensure electrical connection. It has the function to make

On the other hand, a round shaft hole 3b is formed in the center of the gear case 3, and a second bearing 25 is attached to the motor case 2 side of the shaft hole 3b, and an end of the shaft hole 3b. A third bearing 41 is mounted. Since the armature shaft 21 is inserted into the shaft hole 3b, the armature shaft 21 is rotatably supported by the second and third bearings 25 and 41.

In the gear case 3, a wheel gear housing 3c is continuously provided in the shaft hole 3b, and a pivot 10 is fixed substantially at the center of the wheel gear housing 3c. As shown in FIG. 3, the pivot shaft 10 has an elongated shape rightward in the figure from the bottom of the wheel gear housing 3c. A wheel gear 11 is inserted through the pivot shaft 10.

In the wheel gear 11, a pivot shaft insertion hole 11b having an inner diameter slightly larger than the outer diameter of the pivot shaft 10 is formed in the center of a disk-shaped wheel gear body 11a. A damper accommodating portion 11c is formed outside the pivot shaft insertion hole 11b.

The wheel gear 11 has a pivot shaft insertion hole 11b.
A gear shaft 11 is provided at the outer edge of the
Since d is meshed with the worm 21b of the armature shaft 21, the armature shaft 21 rotates in the forward direction by the forward rotation, and rotates in the opposite direction by the reverse rotation of the armature shaft 21. The damper 12 is accommodated in the damper accommodating portion 11c.

The damper 12 is formed of rubber as a raw material, and is integrally connected to the wheel gear 11 by being housed in a damper housing portion 11c of the wheel gear 11. A hub 13 is attached to the damper 12.

The hub 13 has a disc body and is arranged on the damper accommodating portion 11c of the wheel gear 11.
a damper coupling portion 13b fixed to one surface of the damper 12 is provided on the damper 12 side of the hub body 13a.
A pivot shaft insertion hole 13c having an inner diameter slightly larger than the outer diameter of the pivot shaft 10 is formed at the center of a.

The hub 13 is formed with a cylindrical portion 13d protruding from the hub body 13a to the outside of the gear case 3 in the direction of the pivot shaft insertion hole 13c, and an output portion 13e is formed at the tip of the cylindrical portion 13d. Is formed.

The hub 13 has a first O-ring (O-ring) 42 attached to the pivot 10 at the end of the pivot shaft insertion hole 13c. Waterproofing between the shaft 10 is achieved. Since the damper coupling portion 13b is fixed to one surface of the damper 12, when the wheel gear 11 rotates, the hub 13
The power is transmitted through the shaft 13 and rotates while being supported by the pivot shaft 10 inserted into the pivot shaft insertion hole 13c, and the output portion 13e
The window lifting means of the power window device and the roof lid moving means of the sunroof device are operated. The gear case cover 14 is attached to the cylindrical portion 13 d of the hub 13 via a waterproof member 16.

The gear case cover 14 is formed with a hook-shaped gear case fixing portion 14b at the outer edge of a cover main body 14a which is formed in a thin plate shape and covers the wheel gear housing portion 3c of the gear case 3. The gear case cover 14 is fixed to the gear case 3 by caulking a gear case fixing portion 14b to a side plate of the gear case 3 via a second O-ring (O-ring) 45.

The gear case cover 14 includes the cover body 1
A boss 14c is formed substantially at the center of 4a. As shown in FIG. 5, the boss 14c projects cylindrically from the cover main body 14a in the axial direction of the pivot shaft 10. The boss 14c has a cap fixing portion 14d and a first waterproof member fitting portion. 14e, a first hub insertion hole 14f is provided.

The cap fixing portion 14d is formed in an annular shape in the axial direction of the pivot shaft 10. The cap fixing portion 14d has a boss-side fitting portion 15a formed on the cap 15 for supporting the waterproof member. Is fitted.

The first waterproof member fitting portion 14e constitutes a part of the waterproof member attaching portion 43. The first waterproof member fitting portion 14e has a fitting surface in the radial direction of the pivot 10 at the tip side of the cap fixing portion 14d. A first annular projection 16b1 provided on the cover-side crimping portion 16a of the waterproofing member 16 is crimped to the first waterproofing member fitting portion 14e.

The first hub insertion hole 14f is formed as a round hole inside the first waterproof member fitting portion 14e, and the inner diameter of the first hub insertion hole 14f is the cylindrical portion of the hub 13. 1
Since it is larger than the outer diameter of 3d, the cylindrical portion 13d of the hub 13 is inserted into the first hub insertion hole 14f.

In the cap fixing portion 14d of the boss 14c,
A waterproof member supporting cap 15 is attached. The waterproof member supporting cap 15 has a boss-side fitting portion 15.
a, second waterproof member fitting portion 15b, second hub insertion hole 1
5c is provided.

As shown in FIG. 5, the boss side fitting portion 15a is formed in an annular shape having an outer diameter substantially equal to the inner diameter of the cap fixing portion 14d formed on the boss 14c. The fitting portion 15a is fixed to the rear side of the gear case cover 14 by being caulked from the rear side of the gear case cover 14 to the cap fixing portion 14d of the boss 14c.

The second waterproof member fitting portion 15b forms another part of the waterproof member attaching portion 43. The second waterproof member fitting portion 15b has a diameter of the pivot shaft 10 on the wheel gear 11 side of the boss side fitting portion 15a. It is formed in an annular shape as having a fitting surface in the direction,
The first waterproof member fitting portion 14e formed on the boss 14c is disposed to face the first boss 14c. The second waterproof member fitting portion 15b has a second side provided on the cover-side crimping portion 16a of the waterproof member 16.
The annular projection 16b2 is pressed.

The second hub insertion hole 15c is formed as a round hole inside the second waterproof member fitting portion 15b, and the inner diameter of the second hub insertion hole 15c is 1
Since the outer diameter is larger than 3d, the cylindrical portion 13d of the hub 13 is inserted into the second hub insertion hole 15c. Since the cap 15 for supporting the waterproof member is formed in a plate shape and is formed by simple press molding as being smaller than the gear case cover 14, the cap 15 is formed with much less man-hour than the case where the gear case cover 14 is formed twice. Is done.

The waterproof member 16 is fitted into the waterproof member mounting portion 43 composed of the second waterproof member fitting portion 15b of the waterproof member supporting cap 15 and the first waterproof member fitting portion 14e of the boss 14c. Have been.

The waterproof member 16 is, as shown in FIG.
It is formed in an annular shape using elastic rubber as a material,
The waterproof member 16 includes a cover-side crimping portion 16a and an annular lip 16c.

The cover-side crimping portion 16a includes a pair of first and second annular protrusions 16b1 and 16b2. 1st, 2nd
The annular projections 16b1 and 16b2 have a width slightly smaller than the width of the second waterproof member fitting portion 15b of the waterproof member supporting cap 15 and the first waterproof member fitting portion 14e of the boss 14c. Each of the formed waterproof member main bodies 16d is formed in a V-shape and protrudes in an annular shape toward the outer periphery. The outer diameter of the first and second annular protrusions 16b1 and 16b2 is substantially equal to the outer diameter of the waterproof member attaching portion 43.

The annular lip 16c is attached to the gear case cover 1
4 and is formed to protrude in an annular shape from the waterproof member main body 16d to the inner peripheral side from the waterproof member main body 16d.
Two are arranged side by side in the 3d tube direction. Since the inner diameter of the annular lip 16 c is slightly smaller than the outer diameter of the cylindrical portion 13 d of the hub 13, the annular lip 16 c presses against the cylindrical portion 13 d of the hub 13 and the cylindrical portion 13
The waterproofness between d and the gear case cover 14 is achieved.

Before the waterproof member 16 is attached to the waterproof member attaching portion 43, the first and second cover-side crimping portions 16a are attached to the waterproof member attaching portion 43.
The width of the annular projections 16b1 and 16b2 of the second waterproof member fitting portion 15b of the waterproof member supporting cap 15 and the boss 1
4c is larger than the width between the first waterproof member fitting portion 14e and the first waterproof member fitting portion 14e.

The waterproof member 16 is provided after the second annular projection 16b2 of the cover side crimping portion 16a is fitted to the second waterproof member fitting portion 15b of the waterproof member supporting cap 15. Boss side fitting part 1 of cap 15
5a is pushed into the cap fixing portion 14d of the gear case cover 14 and is caulked and fixed.
Since the first and second annular projections 16b1 and 16b2 of FIG. 1A are sandwiched between the second waterproof member fitting portion 15b of the waterproof member supporting cap 15 and the first waterproof member fitting portion 14e of the boss 14c, The first annular projection 16b1 is pressed against the first waterproof member fitting portion 14e of the boss 14c, and the second annular projection 16b2 is pressed against the second waterproof member fitting portion 15b of the waterproof member supporting cap 15 to form a second waterproof member. The first and second annular projections 16b1 and 16b2 are so arranged that the valleys 16e between the first and second annular projections 16b1 and 16b2 are small.
The first and second annular projections 16 are uniformly elastically deformed.
It is fixed to the gear case cover 14 by the elastic repulsion accumulated in b1 and 16b2.

As described above, the waterproof member 16 is provided with the cap 15 for supporting the waterproof member and the boss 1 of the gear case cover 14.
4c, it is fixed to the gear case cover 14 by simply fitting it, so that it can be simply attached without bonding, forming the gear case cover twice, and without providing complicated attaching means on the waterproof member supporting cap 15. . The waterproof member 16 is formed such that the valley portion 16e between the first and second annular projections 16b1 and 16b2 is reduced by fitting the waterproof member supporting cap 15 to the boss 14c of the gear case cover 14. The elastic lip 16c is elastically deformed and elastically attached to the waterproof member attaching portion 43 with the elastic repulsive force accumulated when elastically deformed.
Is pressed against the cylindrical portion 13d of the hub 13, so that even if the small motor 1 is subjected to vibration or the like, the first and second annular projections 16b1 and 16b2 sandwiching the valley 16e cause the vibration and the like at that time. The waterproof performance of the annular lip 16c and the cylindrical portion 13d of the hub 13 is not impaired.

When the small motor 1 having such a structure is used in a power window device, the output portion 13e is connected to a window glass elevator, the gear case 3 is screwed to the window glass elevator, and the vehicle is connected to the connector 44. When the external connector of the power window control circuit on the side is mounted, the first and third holder base terminals 34, 3
9 is electrically connected to the power window control circuit. On the other hand, when used in a sunroof device, the output portion 13e is engaged with the sunroof lid wire, the gear case 3 is screwed to the vehicle body side, and the connector 44 is mounted with an external connector of the vehicle-side sunroof control circuit.

In the case of the power window device, when the power window switch of the power window control circuit is turned on to the open side, the first holder base terminal 34 is connected to the power source, and the third holder base terminal 39 is grounded. Because
First holder base terminal 34, first choke coil 3
2, the first pigtail 26, the first brush 8, the commutator piece 23 electrically connected to the first brush 8
a, the armature coil 24, the other one of the commutator pieces 23a, the second brush 9, the second pigtail 29, the second choke coil 33, the second choke coil electrically connected to the commutator piece 23a. When a current of a power supply flows through the holder base terminal 35, the circuit breaker 38, and the third holder base terminal 39, the armature 6 rotates forward.

The forward rotation of the armature 6 causes the wheel gear 11 to rotate forward through the worm 21b of the armature shaft 21. Therefore, while the damper 12 is elastically deformed, the rotational force of the wheel gear 11 is reduced via the damper 12. The output portion 13e is transmitted to the hub 13 and rotates forward,
The window glass is opened by the window glass elevator.

When the power window switch is turned on to the closed side, the third holder base terminal 39 is connected to the power source, and the first holder base terminal 34 is grounded. 39, a circuit breaker 38, a second holder base terminal 35, a second choke coil 33, a second pigtail 29, a second brush 9,
One of the commutator pieces 23a electrically connected to the second brush 9; the armature coil 24; the other one of the commutator pieces 23a; the first brush 8 electrically connected to the commutator piece 23a; 1
The current of the power supply flows through the pigtail 26, the first choke coil 32, and the first holder base terminal 34, whereby the armature 6 rotates in the reverse direction.

When the armature 6 rotates in the reverse direction, the wheel gear 11 rotates in the reverse direction via the worm 21b of the armature shaft 21. Thus, while the damper 12 is elastically deformed, the rotational force of the wheel gear 11 is reduced through the damper 12. The output portion 13e is transmitted to the hub 13 and rotates in the reverse direction.
The window glass is closed by the window glass elevator.

During the forward rotation and the reverse rotation of the output portion 13 e, the outer edge of the gear case cover 14 is formed by the second O-ring 45 being fitted between the gear case cover 14 and the gear case 3. The first O-ring 42 is fitted to the pivot shaft 10 so that rainwater does not enter between the portion and the gear case 3, and between the hub 13 and the pivot shaft 10. It is waterproofed so that rainwater does not enter the area. further,
First and second annular projections 16b of cover side crimping portion 16a
The gear case cover 14, the waterproof member supporting cap 15, and the gear case cover 14 are sandwiched by the first waterproof member fitting portion 15b of the waterproof member supporting cap 15 and the first waterproof member fitting portion 14e of the boss 14c. The waterproof member 16 elastically fixed to the cover 13 has an annular lip 16c pressed against the cylindrical portion 13d of the hub 13 and the first and second annular protrusions 16b1 and 16b of the cover-side crimping portion 16a.
2 presses against the second waterproof member fitting portion 15b of the waterproof member supporting cap 15 and the first waterproof member fitting portion 14e of the boss 14c, thereby the boss 1 of the gear case cover 14 is pressed.
Waterproofing is provided so that rainwater does not enter between the portion 4c and the cylindrical portion 13d of the hub 13.

[0068]

As described above, according to the small motor according to the first aspect of the present invention, the waterproof member is provided with the waterproof member mounting cap formed by fitting the waterproof member supporting cap to the gear case cover. Fixed to the part. In the waterproof member, the pair of annular protrusions of the cover-side crimping portion are elastically crimped to the waterproof member attaching portion at the outer edge portion, and the inner edge portion is pressed against the cylindrical portion of the hub, so that the gear case cover and the hub are connected to each other. Waterproof between them. Therefore,
There is no need to bond the waterproof member to the gear case cover. Therefore, there is an excellent effect that the productivity is improved with a simple structure.

According to the small motor according to the second aspect of the present invention, when the waterproof member supporting cap is fitted to the boss of the gear case cover, the waterproof member is fitted with the first waterproof member fitting portion of the boss. It is sandwiched and fixed by the second waterproof member fitting portion of the waterproof member supporting cap. Therefore, in addition to the effect of the first aspect, there is an excellent effect that the waterproof member is attached only by fitting the waterproof member supporting cap to the boss of the gear case cover.

According to the small motor according to the third aspect of the present invention, the waterproof member is formed such that the valley between the annular projections is reduced by fitting the waterproof member supporting cap to the boss of the gear case cover. The elastic lip is elastically attached to the waterproof member attaching portion by the elastic repulsive force accumulated when the elastic lip is elastically deformed, and the plurality of annular lips press against the cylindrical portion of the hub. Therefore, in addition to the effect of claim 2,
Even if vibration is applied to the small motor, the annular projection sandwiching the valley attenuates the vibration and the like at that time, and has an excellent effect that the waterproof performance between the annular lip and the cylindrical portion of the hub is not impaired. .

According to the small motor according to the fourth aspect of the present invention, the waterproof member supporting cap has the boss side fitting portion fitted to the cap fixing portion formed on the boss of the gear case cover, so that the waterproof member is provided. Is disposed on the waterproof member mounting portion. Therefore, in addition to the effect of the second or third aspect, the waterproof member supporting cap has an excellent effect that it can be simply attached to the gear case cover without any complicated attaching means.

[Brief description of the drawings]

FIG. 1 is a partially longitudinal front view of a first embodiment of a small motor according to the present invention.

FIG. 2 is a front view of the small motor shown in FIG.

FIG. 3 is a vertical sectional side view of the small motor shown in FIG. 1;

4 is a front view of a holder base used for the small motor shown in FIG.

FIG. 5 is a cross-sectional view of a gear case cover used in the small motor shown in FIG.

6 is an external perspective view of a waterproof member used in the small motor shown in FIG.

FIG. 7 is a schematic diagram of an electric circuit of the small motor shown in FIG.

[Explanation of symbols]

 Reference Signs List 1 small motor 2 motor case 3 gear case 3c (gear housing) wheel gear housing 4 (magnet) first magnet 5 (magnet) second magnet 6 armature 10 pivot shaft 11 wheel gear 12 damper 13 hub 13b damper coupling Part 13d cylindrical part 13e output gear 14 gear case cover 14a cover main body 14c boss 14d cap fixing part 14e first waterproof member fitting part 14f first hub insertion hole 15 waterproof member supporting cap 15a boss side fitting part 15b second Waterproof member fitting portion 15c second hub insertion hole 16 waterproof member 16a cover side crimping portion 16b1 (annular projection) first annular projection 16b2 (annular projection) second annular projection 16c annular lip 16e valley 21 armature shaft 21b Worm 43 Waterproof material removal Part

Claims (4)

[Claims] A motor case; a gear case fixed to an end of the motor case; a magnet disposed inside the motor case; and an armature shaft coupled to a load. An armature that rotates forward on the inner circumference side of the magnet and reversely rotates on the inner circumference side of the magnet when energized in the reverse direction, a pivot shaft disposed in a gear housing formed in the gear case, and the pivot shaft A wheel gear rotatably supported by the armature shaft and meshing with a worm provided on the armature shaft; a damper accommodated in the wheel gear; and a damper coupling portion coupled to the damper.
A hub having a cylindrical portion projecting in the axial direction of the pivot shaft and through which the pivot shaft is inserted, the hub having an output gear formed in the cylindrical portion, and a gear accommodating portion of the gear case; A gear case cover formed with a first hub insertion hole through which the unit and the output gear are inserted; a waterproof member supporting cap that forms a waterproof member mounting portion by being fitted to the gear case cover to form a waterproof member attachment portion; The outer edge has a pair of annular projections in the axial direction of the pivot shaft,
A cover-side crimping portion that is elastically crimped to the waterproof member attaching portion by being fitted into the waterproof member attaching portion is formed, and a waterproof member that has an inner edge portion crimped to the cylindrical portion of the hub is provided. A small motor characterized by the above. 2. A boss protruding from a cover body provided on the gear case cover in the axial direction of the pivot shaft, the first hub insertion hole through which the hub cylindrical portion is inserted, and a second hub insertion hole. A first waterproof member fitting portion, and a waterproof member supporting cap is fixed to the boss; and the waterproof member attaching portion includes a first waterproof member fitting portion of the boss and the first waterproof member fitting portion. The small motor according to claim 1, further comprising a second waterproof member fitting portion formed on the waterproof member supporting cap so as to face the waterproof member fitting portion. 3. The waterproof member has a plurality of inner rims each having an inner diameter smaller than an outer diameter of the hub cylindrical portion, and is disposed in the cylindrical direction of the hub cylindrical portion and press-fitted to the cylindrical portion. Is formed between the first waterproof member fitting portion of the gear case cover and the second waterproof member fitting portion of the waterproof member supporting cap. 3. The small motor according to claim 2, wherein the small valley portion is elastically deformable so as to be small. 4. A cap for supporting a waterproof member is provided with a second hub insertion hole through which a cylindrical portion of a hub is inserted.
A second waterproof member fitting portion is formed outside of the hub insertion hole, and a boss side fitting portion to be attached to a boss of the gear case cover is formed. The boss of the gear case cover has a waterproof member. 4. The small motor according to claim 2, wherein a cap fixing portion is formed in which the boss-side fitting portion of the support cap is fitted inside.