JP2805566B2 - Lead wire drawing structure of rotating electric machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a bracket to which a flange provided at one end of a cylindrical housing is connected.
The present invention relates to a lead wire drawing structure of a rotating electric machine, wherein an insertion hole extending in a direction orthogonal to the axis of the housing is provided, and a lead wire drawn out from the insertion hole extends along the axial direction of the housing.

[0002]

2. Description of the Related Art Conventionally, such a structure is, for example,
-47364, etc.

[0003]

For example, in a power trim / tilt DC motor for an outboard motor, it is necessary to prevent the ingress of water such as seawater at the lead wire lead-out portion, and the lead wire is drawn from the motor. It is necessary that the lead wire does not hinder the operation of the movable part in the outboard motor. In the above-mentioned conventional device, as shown in FIG. The lead wire 8 inserted into the insertion hole 11 ′ is inserted into the grommet 24 attached to the bracket 7 ′ in such a manner as to change its extending direction by 90 degrees. The recess 23 is filled with a sealing resin 15.

In such a structure, however, the recess 23
In the portion where the grommet 24 is mounted and the grommet 24 is attached, the bracket 7 'is formed to protrude relatively large to the side, which is disadvantageous when the bracket 7' must be disposed in a narrow space close to the wall 21 such as a hull. is there. The lead wire 8 inserted into the insertion hole 11 'is raised upward by the grommet 24. The grommet 24 is bent to the bracket 7' by bending the inserted lead wire 8 by approximately 90 degrees. The grommet 24 must be attached, and it is not easy to attach the grommet 24 to the bracket 7 '.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a lead wire drawing structure for a rotating electric machine which can lead out a lead wire without wasting space and has improved assemblability. Aim.

[0006]

According to the present invention, in order to achieve the above object, a recess is provided on the outer surface of the bracket so as to face the outer end of the insertion hole, and the recess is provided between the bracket and the inner surface of the insertion hole. A lead wire filled with the sealing resin and inserted into the insertion hole is drawn out outward through the grommet press-fitted into the concave portion, and the lead wire bent to approximately 90 degrees outside the grommet is housed. Is held between the flange and the bracket.

[0007]

An embodiment of the present invention will be described below with reference to the drawings.

FIGS. 1 to 4 show one embodiment of the present invention. FIG. 1 is a side view of a DC motor to which the present invention is applied, FIG. 2 is a plan view of FIG. FIG. 4 is an enlarged sectional view taken along line 3-3 of FIG. 2, and FIG. 4 is a sectional view taken along line 4-4 of FIG.

1 and 2, this rotating electric machine is a DC motor for power trim / tilt in an outboard motor, and is fixedly arranged at a position close to a wall 21 such as a hull. The housing 6 of the DC motor is formed in a cylindrical shape with a bottom closed at the upper end and functions as a yoke. A flange 6a provided at one end (lower end) of the housing 6 is shown in FIG. The rotor shaft 5 is rotatably supported by a bracket 7 which is rotatably supported via a bearing not provided. A pair of lead wires 8 connected to a coil (not shown) in the housing 6 is drawn out of the bracket 7, and the lead wires 8 are raised upward along the axis of the housing 6. .

Referring also to FIG. 3, the flange 6a is
One end of the housing 6 is provided integrally with one end of the housing 6 so as to project radially outward.
The flange 6a includes a plurality of, for example, a pair of screw members 9,
9 fastens to the bracket 7. Moreover, the flange 6
An annular seal member 10 is interposed between a and the bracket 7.

The bracket 7 is provided with a pair of insertion holes 11 through which the lead wires 8 are inserted so as to extend in a direction perpendicular to the axis of the housing 6 so that the outer ends of the insertion holes 11 face. A recess 12 is provided on the outer surface of the bracket 7. A grommet 14 having a pair of through-holes 13 coaxial with the two through-holes 11 and penetrating the respective lead wires 8, 8 is press-fitted into the recess 12. The lead wires 8, 8 inserted through the grommet 14 are drawn outward from the grommet 14.

Further, a sealing resin 15 is injected into the recess 12 before the grommet 14 penetrating the lead wires 8, 8 inserted into the insertion holes 11 is pressed into the recess 12. Thus, the sealing resin 15 is filled in the gap between the inner surfaces of the insertion holes 11 and the lead wires 8 by the piston action accompanying the press fitting of the grommet 14 into the recess 12. This sealing resin prevents water such as seawater from entering the DC motor.

The lead wires 8, 8 drawn out from the grommet 14 are turned up in the direction along the axis of the housing 6 by changing the extending direction by 90 degrees. Is held between the flange 6a and the bracket 7 for holding the housing 6 in a posture along the axis of the housing 6.

Referring also to FIG. 4, the holding member 16
A holding portion 16a having a pair of holding holes 17, 17 for elastically holding the two lead wires 8, 8 to be inserted;
And a flange 16b projecting toward the bracket 7 from the lower end thereof, and is formed of an elastic material such as rubber.
An engagement hole 18 is provided in 6b.

On the other hand, a fitting recess 19 for fitting the flange 16b of the holding member 16 is provided in a portion corresponding to the recess 12 on the surface of the bracket 7 facing the flange 6a. An engaging projection 20 to be fitted is protruded.

The flange 6a is connected to the bracket 7 with the flange 16b fitted in the fitting recess 19, so that the holding member 16 is sandwiched between the bracket 7 and the flange 6a, and By fitting the portion 20 into the locking hole 18, the detachment of the flange 16b from between the bracket 7 and the flange 6a is reliably prevented. Thus, the holding member 16 sandwiched between the bracket 7 and the flange 6a
As a result, both lead wires 8 are held in a posture along the axis of the housing 6.

Next, the operation of this embodiment will be described. The inner surface of each of the insertion holes 11, the lead wires 8, 8 inserted into the insertion holes 11, and the sealing resin 15 are filled to allow water to enter. Is prevented, and both lead wires 8, 8 are drawn out from the grommet 14 which is press-fitted into the concave portion 12 provided in the bracket 7 with the outer end of each of the insertion holes 11 facing the front end, so that comparison is made with the prior art shown in FIG. In addition, the amount of protrusion of the bracket 7 to the outside can be relatively small because the space for filling the sealing resin is not required, and the wall 21 can be used.
However, the arrangement of the DC motor becomes easy even in a narrow space close to the DC motor.

The lead wires 8, 8 drawn out from the grommet 14 are held by a holding member 16 sandwiched between the flange 6a and the bracket 7, thereby maintaining a posture in which the extending direction is changed by 90 degrees. So grommet 14
Can be easily attached to the bracket 7, and the holding member 16 that penetrates and holds both the lead wires 8, 8 can be easily attached, which can contribute to improvement of the assembling property.

Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above embodiments, and various design changes can be made without departing from the present invention described in the appended claims. It is possible to do.

For example, it is possible to use grommets and holding members individually corresponding to the respective lead wires 8.

[0021]

As described above, according to the present invention, the outer surface of the bracket is provided with a concave portion facing the outer end of the insertion hole, and the space between the bracket and the inner surface of the insertion hole is filled with a sealing resin to be inserted. A lead wire inserted through the hole is drawn out through the grommet press-fitted into the recess, and holds a lead wire bent at approximately 90 degrees outside the grommet in a direction along the axial direction of the housing. The holding member is sandwiched between the flange and the bracket, so that the amount of protrusion of the bracket to the outside can be made relatively small, and the lead wire can be arranged without wasting space. Also, the mounting of the grommet and the holding member Can be facilitated, which can contribute to improvement in assemblability.

[Brief description of the drawings]

FIG. 1 is a side view of a DC motor to which the present invention is applied.

FIG. 2 is a plan view as viewed in the direction of arrow 2 in FIG.

FIG. 3 is an enlarged sectional view taken along line 3-3 of FIG. 2;

FIG. 4 is a sectional view taken along line 4-4 of FIG. 3;

FIG. 5 is a sectional view corresponding to FIG. 3 of the prior art.

[Explanation of symbols]

 Reference Signs List 6 housing 6a flange 7 bracket 8 lead wire 11 insertion hole 12 concave portion 14 grommet 15 sealing resin 16 holding member

Claims (1)

(57) [Claims] 1. A bracket (7) to which a flange (6a) provided at one end of a cylindrical housing (6) is coupled.
And an insertion hole (11) extending in a direction orthogonal to the axis of the housing (6), and a lead wire (8) drawn out of the insertion hole (11) extends along the axial direction of the housing (6). In the lead wire drawing structure of the rotating electric machine to be extended, the outer surface of the bracket (7) has an insertion hole (1).
A recess (12) facing the outer end of 1) is provided, and a sealing resin (15) is filled between the recess and the inner surface of the insertion hole (11), and the lead wire (8) inserted into the insertion hole (11). Is pulled out through the grommet (14) press-fitted into the recess (12), and approximately 90 outside the grommet (14).
A holding member (16) for holding the bent lead wire (8) in a direction along the axial direction of the housing (6) is sandwiched between the flange (6a) and the bracket (7). Lead wire drawing structure of rotating electric machine.