JP2003250242A - Motor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To firmly connect an end of a wiring harness with screws, welding, or the like and, further, to improve water-proofness of a motor. <P>SOLUTION: This motor has a housing 11 covering an opening of a cup- shaped motor case 10 and a wiring harness 20 supplying a power to a drive mechanism 14, and is fixed to a case 19 of a driven object. A hole 11b through which the wiring harness 20 is inserted is formed in the housing 11. Further, there are provided a first sealing member 21 which provides the sealing between the housing 11 and the case 19 of the driven object, and a fixing means 24 which fixes a wires 36 for the motor driving extending from the drive mechanism 14 or connection terminals connected with the wires 36 to the end of the wiring harness 20. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motor for rotationally driving a rotary shaft in a driven body case.

[0002]

2. Description of the Related Art As a motor of this type, a cup-shaped motor case, a rotating shaft, a housing for axially supporting the rotating shaft, and a lid for covering an opening of the motor case, the motor case and the There is a motor that is housed inside a housing and includes a drive mechanism for driving the rotating shaft and a wire harness for supplying power to the drive mechanism, and is fixed to a driven body case. In some of these, the driven body is driven by the rotation of a rotary shaft extending outward from the housing.

In this type of motor, for example, Japanese Patent Laid-Open No. 2-
As described in Japanese Patent No. 91462, a wire harness for supplying electric power to a motor is welded and connected to a lead wire for driving a motor extending from a drive mechanism, and the motor is completed in a subsequent step.

In this motor, since the wire harness installation is included in the automatic assembling process, a flexible wire harness is added during the motor assembling process so that the motor is automatically assembled. It is difficult to deal with. Further, if the length of the wire harness changes, it is necessary to identify and assemble different wire harnesses.

As a means for solving this, special table 2000
As described in Japanese Patent Application Laid-Open No. 502559/1992 and Japanese Patent Application Laid-Open No. 4-109842, a structure has been proposed in which the end portion of the wire harness is fixed by fitting and the wire harness is attached after the motor is automatically assembled.

[0006]

However, in such a structure, the waterproof seal of the wire harness mounting portion has to rely on a seal member such as a liquid gasket,
There is a problem that the reliability of the wire harness connection cannot be strengthened.

[0007] Therefore, an object of the present invention is to firmly connect the ends of the wire harness by screws or welding, and to improve the waterproof performance of the motor.

[0008]

In order to solve the above-mentioned problems, according to the present invention, a cup-shaped motor case, a rotary shaft, and a shaft supporting the rotary shaft are provided. A housing that covers the opening of the motor case,
A motor which is housed inside a motor case and a housing and includes a drive mechanism for driving a rotating shaft and a wire harness for supplying power to the drive mechanism, the motor being fixed to a driven body case, the wire harness being provided in the housing. A first seal member for providing a seal between the housing and the driven body case, a second seal member for providing a seal between the housing and the motor case, and a housing and a wire harness. A third seal member for sealing the gap is provided, and a lead wire for driving the electric motor extending from the drive mechanism or a connecting terminal connected to the lead wire and a fixing means for fixing an end portion of the wire harness are provided.

Further, as described in claim 2, the first seal member is molded with an insulating material, and the first seal member is
An O-ring shaped portion and a coating portion extending to the surface of the fixing means were provided.

Further, as described in claim 3, the fixing means is a screw.

Further, as described in claim 4, the motor case and the driven body case are fixed with the housing sandwiched therebetween.

[0012]

1 is a sectional view of a motor according to an embodiment of the present invention, in which a cup-shaped motor case 10, a rotary shaft 13, and the rotary shaft 13 are axially supported. A housing 11 that covers the opening of the motor case 10 and a drive mechanism 14 that is housed inside the motor case 10 and the housing 11 and that drives a rotating shaft are provided.
A magnet 12 facing the drive mechanism 14 is provided in the case. The rotary shaft 13 is rotatably supported by bearings 27 and 28. The housing 11 is provided with a hole 11b into which the end of the wire harness 20 is inserted. A second seal member 22 is provided between the housing 11 and the motor case 10. An O-ring is used for the second seal member 22.

Coil wire 1 extending from drive mechanism 14
5, 16 are commutator terminals 17 fixed to the rotary shaft 13,
It is connected to 18. The commutator terminals 17 and 18 face the brush 35 and another brush (not shown), respectively.
The brush 35 is connected to the lead wire 37. Another brush not shown is connected to the lead wire 36. As shown in FIG. 3, the lead wires 36 and 37 are connected to conductive connection terminals 31 and 32 provided on one surface of the housing 11, respectively.

The above construction is used for the motor subassembly 39.
Prepare as. In addition, these can be assembled by automatic assembly.

On the other hand, terminals 25 and 38 are fixed to the ends of the two wire harnesses 20 and 30, respectively. Further, the third seal member 23 is attached to the wire harness 20. Although not shown, the wire harness 3
0 also includes a third seal member.

After these are prepared, as shown in FIG. 4, the wire harness 20 is attached to the motor subassembly 39.
Assemble. The wire harness 20 is inserted into the hole 11b of the housing 11, and the hole 11b and the third seal member 23 are inserted.
Insert it until it comes into close contact. The terminal 25 is fixed to the housing 11 so as to make electrical contact with the connection terminal 31 by a screw 24 as a fixing means. Nut 3 on housing 11
4 is incorporated, and the screw 24 sandwiches the terminal 25 and the connection terminal 31 and is screwed into the nut 34. The other wire harness 30 is assembled in the same manner. As shown in FIG.
The terminal 38 is connected to the connection terminal 32 by a screw 33 as a fixing means.
Is fixed to the housing 11 so as to make electrical contact with.

The connection terminals 31 and 32 are provided below the housing 11 in FIG. 1 on the exposed side before mounting. Therefore, fixing by the fixing means is not difficult.

The motor case 10 is provided with a collar portion 10a, and the housing 11 is provided with a collar portion 11a. By sandwiching the collar portion 11a of the housing 11,
The flange portion 10a of the motor case 10 is fixed to the driven body case 19 with a screw 29. At this time, the housing 11
The first seal member 21 is placed between the driven body case 19 and the driven body case 19 to seal between the housing 11 and the driven body case 19.

The first seal member 21 is formed of an insulating material and has an O-ring shaped portion 21a and a coating portion 21b extending to the surface of the fixing means. As shown in FIG. 5, the covering portion 21b has a donut-shaped thin plate shape. Further, the covering portion 21b is provided with a breathing hole 21c. The covering portion 21b completely covers the screws 24 and 33. The covering portion 21b also covers the connection terminals 31 and 32.
As a result, even if the driven body case 19 is a conductor, the electrical conduction portion can be insulated.

In the above-described embodiment, the brush motor has a structure in which the rotating shaft 13 is rotated by supplying power to the wire harnesses 20 and 30, and the end 26 of the rotating shaft 13 reaches the inside of the driven body case 19. The driven body case 19 extends
The driven body in the above is driven. The driven body is, for example, a hydraulic pump.

As another embodiment, the motor may be a brushless motor or another type of motor.

As another embodiment, instead of the screws 24 and 33, fixing means such as welding can be used. However, the use of screws can easily provide adequate strength.

As another embodiment, the connection terminals 31, 32
The lead wires 36 and 37 are directly fixed to the terminal 2 without using
The structure may be fixed to 5, 38.

[0024]

According to the motor described in claim 1,
The rotary shaft and the drive mechanism are assembled in a cup-shaped motor case, the housing is covered, the wire harness is inserted into the hole of the housing, and then the end is fixed by the fixing means.
It can be manufactured by attaching to the driven body case via the seal member. Therefore, the motor case, the rotary shaft, the drive mechanism, and the housing can be automatically assembled.
In addition, the first seal member, the second seal member, and the third seal member can waterproof the electrical connection portion. A rubber member such as an O-ring can be used for these seal members, and the waterproof performance can be improved. The ends of the wire harness can be firmly connected electrically and mechanically by screws or welding. Furthermore, even if the length of the wire harness changes, it can be handled.

According to the motor of the second aspect, the first seal member is formed of an insulating material, and the first seal member has an O-ring-shaped portion and a coating portion extending to the surface of the fixing means. Since it is provided, the housing and driven body case are O
The ring-shaped part ensures a reliable seal. Further, since the surface of the fixing means is covered with the covering portion, it is possible to feel at ease even if the driven body case is made of a conductive material. Furthermore, the two functions of waterproofing and insulation can be achieved at once by simply sandwiching and assembling the first seal member between the housing and the driven body case.

According to the motor of the third aspect, since the fixing means is a screw, a simple and highly reliable connection of the wire harness can be obtained.

According to the motor of the fourth aspect, the motor case and the housing, and the housing, the first seal member, and the driven body case can be assembled at one time, and the respective waterproof performances can be obtained. Can be increased.

[Brief description of drawings]

FIG. 1 is a sectional view of a motor according to an embodiment of the present invention.

FIG. 2 is a partially enlarged view of the motor shown in FIG.

FIG. 3 is a partial cross-sectional bottom view of the motor of FIG. 1 during manufacturing.

FIG. 4 is an assembly diagram of the motor of FIG. 1.

5 is a bottom view of the motor of FIG. 1 during manufacturing.

[Explanation of symbols]

10 Motor case, 10a, 11a Collar part, 11
Housing, 11b hole, 12 magnet, 13 rotating shaft, 14 drive mechanism, 15, 16 coil wire, 3
6,37 Lead wire, 17,18 Commutator terminal, 19
Driven body case, 20, 30 wire harness, 21
First seal member, 21a O-ring shaped portion, 21b
Coating portion, 21c hole, 22 second sealing member, 23
Third seal member, 24, 29, 33 screw, 25,
38 terminals, 26 ends, 27, 28 bearings, 31,
32 connection terminal, 34 nut, 35 brush, 39
Motor subassembly

Claims (4)

[Claims] 1. A cup-shaped motor case, a rotary shaft, a housing that axially supports the rotary shaft, and covers the opening of the motor case, and is housed inside the motor case and the housing. A motor provided with a drive mechanism for driving the rotating shaft and a wire harness for supplying power to the drive mechanism, the motor being fixed to a driven body case,
A first seal member for providing a seal between the housing and the driven body case and a second seal for providing a seal between the housing and the driven body case are provided in the housing for inserting the wire harness. A sealing member, a third sealing member for sealing between the housing and the wire harness, a lead wire for driving an electric motor extending from the drive mechanism, or a connection terminal connected to the lead wire and the wire harness. A motor having a fixing means for fixing an end portion. 2. The motor according to claim 1, wherein the first
The motor according to claim 1, wherein the sealing member is formed of an insulating material, and the first sealing member is provided with an O-ring-shaped portion and a coating portion extending to the surface of the fixing means. 3. The motor according to claim 1, wherein the fixing means is a screw. 4. The motor according to claim 1, wherein the motor case and the driven body case are fixed with the housing interposed therebetween.