JPH0255547A - wire drive device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a power source for a vehicle that requires opening and closing of windows and doors of various parts of an automobile, including a skylight commonly known as a sunroof, and other drives. The present invention relates to a wire drive device that can be used as a power source that can be applied to houses, other buildings, and mechanical equipment in general.

[Conventional technology]

2. Description of the Related Art Wire drive devices are conventionally known that directly convert the rotation of a drive motor capable of forward and reverse rotation into reciprocating motion of a wire, and use this wire to directly push and pull a window glass to open and close it.

In this drive device, a screw-type flexible wire is passed through a hollow rotor shaft of a drive motor that can rotate forward and backward, and the wire is inserted into a female thread provided on the inner peripheral surface of the rotor shaft. They are screwed together, a wire is led outside the drive motor to the window side by a wire guide, and the tip of this wire is connected to the window glass. And the fifth
As shown in the figure, the lower end of the wire guide a was supported by the motor frame C of the drive motor b, and was located close to the upper end of the rotor shaft d with a gap g provided therebetween. In addition,
In Figure 5, e is the female thread, f is the screw type wire, and h
indicates a bearing.

In such a wire drive device, when the drive motor b is operated to rotate the rotor shaft d, the wire f can be moved in the axial direction due to the engagement between the female screw portion e and the screw wire f. Therefore, by rotating the drive motor b in the forward direction, the wire pushes up the window glass, and by rotating the drive motor b in the reverse direction, the window glass is pulled down, thereby automatically opening and closing the window.

[Problem to be solved by the invention]

Incidentally, the drive motor b may be arranged with its axis vertically or diagonally, and in this case, water will run down the wire guide a and the wire f when a window is opened or closed.

In such a case, not all of the water that flows down the wire guide a and the wire f passes through the hollow part of the rotor shaft d, and some of the water falls between the lower end of the wire guide a and the upper end of the rotor shaft d. Through the gap g (this gap g is essential to prevent the rotation of the rotor shaft d from being transmitted to the wire guide a), the wire is inserted into the space indicated by the symbol l in Fig. 5. It leaks. Therefore, in the conventional configuration described above, there is a risk that water leaking into the space i may enter the current-carrying portion in the motor frame C through the bearing portion.

SUMMARY OF THE INVENTION An object of the present invention is to obtain a wire drive device that can prevent water from entering the current-carrying portion within the drive motor.

[Means to solve the problem]

In order to achieve the above object, in the wire drive device of the present invention, a recess is provided at the upper end of the rotor shaft of the drive motor, which is arranged with the axis vertically or diagonally, and these four parts are placed above the rotor shaft. The wire guide is formed to have an opening in the end face and communicate with the upper end of the hollow part of the rotor shaft at the lower end opposite to the opening, and the lower end part of the wire guide disposed above the drive motor is inserted into the recessed part. It is inserted with a gap provided between it and the inner surface.

[Effect]

According to the wire drive device configured as described above, the inner surface of the recess formed at the upper end of the rotor shaft and the lower end of the wire guide do not touch each other by providing a gap between them. , it enables smooth rotation of the rotor shaft, and the rotation is not transmitted to the wire guide. Since the recess provided in the rotor shaft surrounds the lower end of the wire guide, water running down the wire or the like is prevented from leaking out of the rotor shaft.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 4.

In the figure, reference numeral 1 denotes a drive motor consisting of a commutator motor capable of forward and reverse rotation by switching the current direction. As shown in FIG. 4, the drive motor has bearings 3 installed inside bearing brackets 2a and 2b formed at both ends of a motor frame 2, respectively, and a stator 4 made of a permanent magnet between these bearings 3. A rotor 5 attached to the inner surface of the frame 2 and passing through the stator 4 is housed in the moda frame 2, and a pair of brush devices 7 are pressed against the commutator 6 attached to the rotor 5. There is. The brush device 7 is attached to the inner surface of one end of the motor frame 2 via an insulating member 8. The drive motor is arranged with its axis vertically or obliquely.

The rotor 5 has a commutator 6 attached to the outer surface of a rotor shaft 9 whose both ends are rotatably supported by the bearings 3.
A rotor core 10 is attached opposite to the stator 4, and a rotor coil 11 is further wound around the core 10.

The rotor shaft 9 has a hollow structure, and a female threaded portion 12 is formed in a small diameter portion provided on the inner peripheral surface of the upper portion thereof. A recess 13 is formed at the upper end of the rotor shaft 9 . As shown in FIG. 1, the recess 13 opens at the upper end surface of the rotor shaft 9, and the hollow portion 9a1 end of the rotor shaft 9 communicates with the center of the bottom surface forming the lower end opposite to this opening. Let it be.

A screw-type flexible wire 14 is threaded into the internally threaded portion 12 and penetrated into the hollow portion 9a of the rotor shaft 9. The wire 14 has a spiral shape on its outer periphery, and is formed, for example, by winding a steel wire in a spiral shape at a constant pitch around the outer periphery of a wire core.

Further, a wire guide 15 is disposed above the drive motor 1, and this guide 15 guides the wire 14 upward. The upper end of the wire 14 led to the wire guide 15 is connected to a load, such as a window glass 16 of an automobile, via a connector 17, as shown in FIG. Note that the wire guide 15 is provided with a groove 1.5a along its axial direction, as shown in FIG. ing.

Further, reference numerals 18 to 20 in FIG. 2 indicate guide members that guide the downward movement of the window glass 16 while regulating the position in the front-rear direction and left-right direction in the figure, and 21 indicates a window opening.

As shown in FIGS. 1 and 4, the lower end of the wire guide 15 is inserted into the bearing bracket 2a on the second side of the motor frame 2, and
a, and is inserted into the recess 13 of the rotor shaft 9. A gap G is formed between the lower end of the wire guide 15 and the inner surface of the recess 13, as shown in FIG.

In the wire drive device having the configuration of J2, the drive motor 1
By operating the rotor shaft 9 to rotate the rotor shaft 9 in the forward direction, the wire 14 is sent upward in the axial direction through the engagement between the female screw portion 12 of the rotor shaft 9 and the screw wire 14. Therefore, the wire 14 pushes the window glass 16 by -1
- and close the window. Further, by rotating the rotor 5 in the opposite direction, the wire 4 is sent downward in the axial direction due to the engagement between the female screw portion 12 of the rotor shaft 9 and the screw type wire 14, so that the wire 14 is sent downward to the window glass 16. Pull down and open the window.

In such an operation, since the upper end of the rotating rotor shaft 9 and the lower end of the fixed wire guide 15 are close to each other with a gap G formed therebetween, the rotation of the rotor shaft 9 The rotor shaft 9 is not transmitted to the wire guide 15.
can rotate smoothly.

Although the gap G as shown in ``2'' is provided between the 1st end of the rotor shaft 9 and the lower end of the wire guide 15, there are 4 gaps at the 1st end of the rotor shaft 9. 13,
Insert the lower end of the wire guide 15 here, and
Since the gap G is formed between them, this gap G is provided within the length range of the rotor shaft 9.

Therefore, when water flows down the wire 4 and the wire guide 15 and enters the drive motor 1, the water does not leak out of the rotor shaft 9 through the recess 13 surrounding the lower end of the wire guide 5. All of the water that has entered can be drained out of the drive motor 1 from the lower end of the hollow part 9a of the rotor shaft 9.

Therefore, water that has entered the drive motor passes through the gap G and the space 2C inside the bearing bracket 2a of the drive motor.
(See Figures 1 and 4), and eventually the space 2c passes through the bearing 3 to the current-carrying parts (rotor coil 11, commutator 6, plus device 7) in the drive motor 1. , there is no risk of water intrusion.

〔Effect of the invention〕

According to the present invention configured as described above, a recess is provided at the upper end of the hollow rotor shaft which is disposed with its axis vertically or diagonally and is provided with a drive motor for driving a screw wire. By inserting the lower end of the wire guide with a gap between the inner surface of the four parts, it is possible to prevent water that has entered through the wires from leaking out of the hollow part of the rotor shaft. Water can be prevented from entering the current-carrying parts.

[Brief explanation of the drawing]

1 to 4 show an embodiment of the present invention, in which FIG. 1 is a vertical sectional view of the main parts, FIG. The figure is a sectional view taken along the line ■--■ in FIG. 2, and FIG. 4 is a longitudinal sectional view of the drive motor. FIG. 5 is a longitudinal sectional view of the upper part of the drive motor in a conventional wire drive device. DESCRIPTION OF SYMBOLS 1... Drive motor, 9... Rotor shaft, 9a... Hollow part, 12... Female threaded part, 13... Recessed part, 14...
・Wire, 15... Wire guide, G... Between p1 construction. Applicant's agent Patent attorney Takehiko Suzue Figure 5

Claims (1)

[Claims] A drive motor that rotates forward and backward is arranged with its axis vertically or diagonally, and a screw-type wire is passed through a hollow rotor shaft provided in the drive motor, and this wire is connected to the A wire drive device that is screwed into a female thread provided on the inner circumferential surface of the child shaft and moves the wire in the axial direction by rotation of the rotor shaft, the wire drive device having an opening in the upper end surface of the rotor shaft; A recess is provided at the upper end of the rotor shaft with which the upper end of the hollow part of the rotor shaft communicates at the lower end opposite to the opening, and the lower end of the wire guide disposed above the drive motor is inserted into the recess. A wire drive device characterized in that the wire drive device is inserted with a gap provided between the wire drive device and the inner surface of the wire drive device.