JPH0626050Y2 - Holder base mounting structure for small motors for automotive electrical components - Google Patents

Description

[Detailed description of the device]

[The purpose of the device]

(Industrial field of application) The present invention relates to a small motor for an electric component of an automobile, which is used to drive the window glass to an open side or a closed side in a power window device of an automobile, and particularly,
The present invention relates to a holder base mounting structure that holds a brush that supplies a predetermined power to an armature commutator of a motor. (Prior Art) Conventionally, as a holder base mounting structure of the above-described small motor for automobile electrical components, there is one shown in FIG. 4, for example. That is, the illustrated small motor 100 for automobile electrical components
Is mounted on the motor case 102 of the motor unit 101 in the armature 1.
03 is rotatably housed, and a worm 103b portion provided on an armature shaft 103a of an armature 103 is attached to a motor case 101 in a gear case 106 of a gear portion 105 integrated with a motor case 102 by screwing a screw 104 into the motor case 101. The worm wheel 107, which is inserted into the armature shaft insertion hole 106a provided in the gear case 106 and is rotatably housed in the worm wheel housing portion 106b of the gear case 106, is fixed to the output shaft 108 in a state of protruding from the side. Worm 103 provided on the armature shaft 103a
It is engaged with b. A holder in which brushes 109, 109 for supplying a predetermined power by being pressed against the commutator 103c of the armature 103 are attached to the left end portion of the gear case 106 in FIG. 4 via the brush holders 110, 110, respectively. Base 111
The holder base 111 includes a ring-shaped packing 112 sandwiched between the outer peripheral portion of the holder base 111 and the left end of the gear case 106 in FIG. It is fixed by a holder base pressing projection 102a near the right end. Therefore, from the external connection wiring 113, 113 to the armature 10
By supplying a predetermined power to the commutator 103c of No. 3 via the brushes 109, 109, the armature 103 rotates, and the worm wheel 107 meshing with the worm 103b provided on the armature shaft 103a of the armature 103 rotates. Therefore, the output shaft 108 rotates and, for example, in a power window device, the window glass connected to the output shaft 108 is driven in accordance with the opening side or the closing side operation. (Problems to be Solved by the Invention) However, in the above-mentioned conventional holder base mounting structure of the small motor for electric equipment of the automobile, the holder base 111
With the ring-shaped packing 112 sandwiched between the outer peripheral portion of the motor case and the left end of the gear case 106 in FIG. 4, the motor case 102 is fixed by the holder base pressing projection 102a near the right end in FIG. Therefore, when the armature 103 rotates, the brushes 109 and 109 pressed against the commutator 103c of the armature 103 are arranged in the radial direction of the commutator 103c and / or the diameter of the commutator 103c. When a vibration is generated by repeatedly receiving a force acting in a direction substantially orthogonal to the direction, the vibration is transmitted from the brushes 109, 109 to the brush holders 110, 110, respectively, and further, from the brush holders 110, 110. Motor case 1 transmitted to the base 111 and fixing the holder base 111
02, the motor case 102 vibrates. As a result, there is a problem in that the small motor 100 for automobile electrical components vibrates as a whole, resulting in a loud operating sound and lacking a sense of quality. There was a problem that it was desired to do so. (Object of the Invention) The holder base mounting structure for a small motor for automobile electrical equipment according to the present invention can suppress the vibration of the brush during the operation of the motor to the motor case and the gear case, thereby making the operation noise quiet. An object of the present invention is to provide a holder base mounting structure for a small motor for automobile electric components that can be manufactured.

[Constitution of device]

(Means for Solving the Problems) A holder base mounting structure for a small motor for automobile electrical equipment according to the present invention is fixed to a motor case (3) accommodating an armature (2) and a motor case (3). Along with
A gear case (6) for accommodating the gear (5); and a holder base (9) for holding the brushes (10, 10 ') for supplying an electric current to the armature (2) accommodated in the motor case (3). A holder base mounting structure in a small motor for automobile electrical equipment, comprising: a contact portion (20e) contacting the gear case (6) and a holder base (between the gear case (6) and the holder base (9). An annular damper (20) for impact absorption, which has an abutting portion (20b) abutting against the motor case (3) and an abutting portion (20d) abutting against the motor case (3), is arranged, and the gear case (6) includes a holder. Base (9)
A rod-shaped projection (6f) for inserting the rod-shaped projection (6f) is formed in the holder base (9).
c, 9c) is formed, and the holder base (9) and the bar-shaped projection (6f) formed on the gear case (6) have a fitting groove (25b) for the holder base and a bar-shaped projection for the bar-shaped projection. A grommet-like damper (25) having an insertion portion (25a) for shock absorption is attached, and the grommet-like damper (25) is pressed against the rod-like projection (6f) to prevent the grommet-like damper (25) from falling off. It is characterized in that a retaining member (25c) is attached. (Effect of the Invention) In the holder base mounting structure of the small motor for automobile electrical equipment according to the present invention, the contact portion (20e) is brought into contact with the gear case (6) and the motor case (3) is attached to the holder base (9). The abutting portion (20b) of the shock absorbing annular damper (20) abutting the abutting portion (20d) abuts, and the fitting hole (9c, 9c) for the holder base is inserted into the mounting hole (9c, 9c). The rod-shaped protrusion (6f) of the gear case (6) is inserted through the rod-shaped protrusion insertion portion (25a) of the shock absorbing grommet-shaped damper (25) equipped with the rod-shaped protrusion (6f). Since the retaining member (25c) for pressing the cylindrical damper (25) to prevent the grommet damper (25) from coming off is attached, the annular damper (20) attached to the holder base (9).
Water is prevented from entering from the outside of the motor case (3), and the holder base (9) is held against the motor case (3) by the annular damper (20) and the shock absorbing grommet-shaped damper (25). However, the gear case (6) is also attached without direct contact. Therefore, infiltration of water from the outside of the motor case (3) is prevented, and the brush (1) transmitted to the holder base (9) is prevented.
Vibration from 0, 10 ') is a non-contact motor case (3)
Also, it is not directly transmitted to the gear case (6). (Embodiment) A holder base mounting structure for a small motor for automobile electrical equipment according to an embodiment of the present invention will be described below with reference to FIGS. 1 to 3. That is, the illustrated small-sized motor 1 for automobile electrical equipment is provided with a motor section 4 in which a armature 2 is rotatably housed in a motor case 3 on the left side in FIG. Worm 2 provided on the armature shaft 2a of the armature 2 protruding from the motor unit 4 side on the right side of
The gear case 7 accommodates the worm wheel 5 meshed with b in the gear case 6 in a rotatable state. The motor case 3 of the motor unit 4 is fixed to the gear case 6 of the gear unit 7 by screwing a screw 8 into the gear case 6. ing. Further, in a state where the brushes 10 and 10 'for supplying a predetermined power by pressing the commutator 2c attached to the armature shaft 2a of the armature 2 to the holder base 9 are attached to the brush holders 11 and 11', respectively. It is held by the conductive terminals 12 and 12 ', respectively. The motor case 3 has a bottomed cylindrical shape with an opening on the right side in FIG. 1, and is provided with a mounting portion 3a on the motor case side that is fixed to the gear case 6 at the open edge thereof. The field magnet 1 is located in the center of the inner circumference.
3 is attached, and a bearing 14 for rotatably supporting one end side of the armature shaft 2a near the left end in FIG.
Is installed. Here, the armature 2 has a commutator 2c attached to the left side in FIG. 1 of the armature shaft 2a, and an armature core 2e wound with an armature coil 2d connected to the commutator 2c. The armature shaft 2a is provided with a worm 2b that engages with the worm wheel 5 on the right side in FIG. On the other hand, the gear case 6 is provided with a mounting portion 6b on the gear case side that is fixed to the mounting portion 3a on the motor case side provided on the motor case 3 at the end edge of the end bracket 6a near the left end in FIG. An armature shaft insertion hole 6c for inserting the worm 2b of the armature shaft 2a is provided by cutting the end bracket 6a from the left end in FIG. 1 toward the right side in the drawing. The worm wheel housing portion 6 is provided with a worm hole 5 to which the output shaft 15 is fixed, on the lower side of the armature shaft insertion hole 6c in FIG.
It is stored in d. Further, the gear case 6 is provided with protrusions 6e, 6e protruding leftward from the end bracket 6a in FIG. 1, and the protrusions 6e, 6e from the left end in FIG. In addition, rod-shaped projections 6f and 6f which respectively protrude further to the left are provided. As shown in FIG. 2, the gear case 6 has an annular damper for shock absorption, which protrudes upward in the drawing in a racetrack shape on the outer peripheral side of each of the protrusions 6e, 6e, as shown in FIG. End portion 6 of the gear case 6 that abuts 20
have g. On the other hand, as shown in FIG. 2, the holder base 9 is provided with an insertion opening 9b through which the armature shaft 2a of the armature 2 is inserted, at an approximately central portion of a holder base body 9a having an outer shape of an oval. Grommet-shaped dampers 25, 2 for shock absorption, which will be described later, are provided on the upper and lower sides of the insertion opening 9b in FIG.
5 in which the insertion holes 9c. 9c is provided. Further, the holder base 9 is provided with a holding portion 9d which projects from the holder base body 9a in a slightly annular shape downward in FIG. 2 to guide an annular damper 20 for shock absorption described later, and The insertion opening 9b
2 and extends below the holder base body 9a in FIG.
The external terminals 13 and 14 connected to the external connection wiring (not shown) are fixed to the outside of the circuit breaker, and the terminals 30a and 30b of the circuit breaker 30 are fixed to the circuit breaker 30 in a state of protruding upward in FIG. . Then, in the holder base 9, the conductive terminals 1 in which the other ends of the brush holders 11 and 11 'having the brushes 10 and 10' attached to one end are welded to both sides of the insertion opening 9b are welded.
2 and 12 'are attached to each other, and one of the conductive terminals 12 and 12' is a conductive terminal 12 of the external terminals 13 and 14.
Connected to the other conductive terminal 12 '
Is connected to one terminal 30a of the circuit breaker 30, and the other terminal 30b of the circuit breaker 30 is connected to the external terminal 14. In addition, the shock absorbing grommet-shaped dampers 25, 25 and the shock absorbing annular damper 20 are separate components in this embodiment. The grommet-shaped damper 25 has a substantially cylindrical outer shape,
It is made of elastic rubber and has a grommet-shaped damper 25 at the center thereof from the upper side to the lower side in FIG.
Is provided with a rod-shaped projection insertion portion 25a that penetrates through and engages with a rod-shaped projection 6f provided on the gear case 6, and the holder base 9 is fitted and inserted into the mounting hole 9c provided on the holder base 9 on the outer periphery. The groove 25b is provided. The grommet-shaped dampers 25, 25 are held by the holder base 9 by fitting the fitting holes 25b, 25b into the holder base 9 into the mounting holes 9c, 9c provided in the holder base 9. With the grommet-shaped dampers 25, 25 held by the holder base 9, the rod-shaped protrusion insertion portions 25a, 25a are locked to the rod-shaped protrusions 6f, 6f provided on the gear case 6, and At the upper side of the grommet-shaped dampers 25, 25 in FIG. 2, the retaining members 25c, 25c are pressed into the rod-shaped projections 6f, 6f to be pushed in. The retaining members 25c, 25c are the rod-shaped projections 6 respectively.
By being inserted into f and 6f, the grommet-shaped dampers 25 and 25 support the holder base 9 on the gear case 6 so as not to fall off. The ring-shaped damper 20 is made of rubber having a ring-like shape, which has a substantially racetrack shape, and has elasticity, and is flat on the left side of the ring-shaped portion 20a in FIG. 1 so as to come into contact with the holder base body 9a of the holder base 9. 2 is provided with an abutting portion 20b on the side of the holder base, and a lip-shaped motor case side protruding from the outer peripheral wall 20c of the ring-shaped portion 20a in FIG. The contact portion 20d is provided. And further, the first
On the right side of the ring-shaped portion 20a in the figure, a gear case-side contact portion 20e that contacts the end 6g of the gear case 6 is provided, and the inner peripheral wall 20f of the ring-shaped portion 20a is attached to the holder base 9a.
The annular damper 20 is held by the holder base 9 by being fitted into the holding portion 9d provided on the holder base body 9a. Here, as shown in FIG. 1, a gear case provided for the shock absorbing annular damper 20 in a state where the shock absorbing annular damper 20 is held by a holding portion 9d provided on the holder base body 9a of the holder base 9. Side contact portion 20e is in contact with the end portion 6g of the gear case 6, and the mounting holes 9c and 9 are provided in the holder base body 9a of the holder base 9.
While holding the shock absorbing grommet-shaped dampers 25 and 25 by c, the rod-shaped projection insertion portions 25a and 25a are locked to the rod-shaped projections 6f and 6f provided on the gear case 6 and the retaining member 25c. , 25c to the rod-shaped projections 6f, 6
It is inserted in f. Here, the holder base 9 includes the retaining members 25c, 2
5c is fixed to the gear case 6 by grommet-shaped dampers 25, 25 having rod-shaped projections 6f, 6f attached thereto, and annular case dampers 20 abutting on the gear case 6 and the motor case 3, respectively, are used for the gear case 6 and the motor case. It is also attached to 3 in a non-contact manner. In the small motor vehicle electric component motor 1 having such a structure, when a current is supplied from one external terminal 13 to the other external terminal 14 by turning on and off a switch (not shown), the one external terminal 13 and one conductive terminal Terminal 12, one brush holder 11, one brush 10, commutator 2c, the other brush 10 ', the other brush holder 11', and the other conductive terminal 1
2 ', one terminal 30a of the circuit breaker 30, the other terminal 30b of the circuit breaker 30, and the other external terminal 14, current flows, so that the armature coil 2d
An electromagnetic induction action occurs between the field magnet 13 and the field magnet 13 to rotate the armature 2. When the armature 2 rotates, the worm wheel 5 that meshes with the worm 2b provided on the armature shaft 2a rotates, so that the output shaft 15 fixed to the worm wheel 5 rotates. Drives the window glass (not shown) connected to the output shaft 15 to the open side or the closed side according to the switching of the switch. Then, when the armature 2 rotates, the commutator 2 of the armature 2
Even if each of the brushes 10 and 10 'pressed against c vibrates, the vibration is not transmitted from the holder base 9 to the gear case 6 and the motor case 3.

[Effect of device]

As explained above, since the holder base mounting structure of the small motor for electric equipment according to the present invention has the above-mentioned structure, the vibration generated in the brush when the armature rotates causes the vibration from the holder base to the gear case. However, since it is difficult to be transmitted to the motor case, the operation noise of the motor can be made quiet, and it is possible to maintain the quality due to the quiet operation sound and to obtain the excellent effect that the waterproof property is improved.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view for explaining a holder base mounting structure of a small motor for automobile electrical equipment according to an embodiment of the present invention,
FIG. 2 is an external view showing an assembling relationship of each part around the holder base of the holder base mounting structure of the small motor for automobile electric components shown in FIG. 1, and FIG. 3 is for the automobile electric components shown in FIG. FIG. 4 is a vertical sectional side view of a holder base mounting structure of a conventional small-sized motor for electrical equipment for automobiles. DESCRIPTION OF SYMBOLS 1 ... Small motor for automobile electrical equipment 2 ... Armature 3 ... Motor case 5 ... Gear 6 ... Gear case 6f ... Rod-shaped projection 9 ... Holder base 9c, 9c ... Mounting hole 10, 10 '... Brush 20 ... Annular damper 20b ... Contact Part 20e ... Abutting part 20d ... Abutting part 25 ... Grommet-shaped damper 25a ... Rod-shaped projection insertion part 25b ... Fitting groove 25c ... Fall prevention member

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Claims (1)

[Scope of utility model registration request] 1. A motor case (3) accommodating an armature (2), a gear case (6) fixed to the motor case (3) and accommodating a gear (5), and the motor case (3). 3) A holder base mounting structure for a small motor for automobile electrical equipment, comprising: a holder base (9) for holding a brush (10, 10 ') supplying an electric current to an armature (2) housed in 3). Between the gear case (6) and the holder base (9), an abutting portion (20) that abuts the gear case (6).
e) and an abutting portion (20) abutting the holder base (9).
b) and the contact portion (2) that contacts the motor case (3).
0d), an annular damper (20) for shock absorption is arranged, and the gear case (6) is formed with a rod-shaped projection (6f) for inserting the holder base (9). Is formed with a mounting hole (9c, 9c) through which the rod-shaped protrusion (6f) is inserted, and between the holder base (9) and the rod-shaped protrusion (6f) formed on the gear case (6). A shock absorbing grommet-like damper (25) having a holder base fitting groove (25b) and a rod-shaped protrusion insertion portion (25a) is mounted, and the rod-shaped protrusion (6f) has: A holder motor for a small motor for automobile electrical equipment, characterized in that a retaining member (25c) for pressing the grommet-shaped damper (25) to prevent the grommet-shaped damper (25) from falling out is attached. Base mounting structure.