JPH07111111B2 - Electric wire drive - Google Patents

Description

TECHNICAL FIELD OF THE INVENTION The present invention relates to a power source for a vehicle that requires opening and closing of windows and doors of various parts of a vehicle including a skylight, which is commonly called a sunroof, and other driving. The present invention also relates to an electric wire drive device that can be used as a power source that can be applied to houses, other structures, mechanical equipment, and the like.

[Prior Art] A flexible screw type wire formed by spirally winding wire rods as outer circumferential protruding teeth around the outer periphery of a wire core material is driven while guiding the wire with a guide. 2. Description of the Related Art An electrically-operated wire drive device is known in which a wire is reciprocated by a motor and a load, for example, a window glass is directly pushed and pulled by this wire to open and close the window glass.

Then, the applicant of the present invention, in this type of drive device, reduces the frictional resistance at the bent portion of the guide for guiding the wire,
An electric wire drive device capable of improving the efficiency of transmission of force from a drive motor to a load has been recently developed and has already been filed (Japanese Patent Application No. 1-116990).

This electric wire drive is shown in FIGS. 8 and 9. In the figure, 1 is a screw type wire whose one end is connected to a window glass of a passenger car (not shown), 2 is a drive motor composed of a commutator motor capable of forward and reverse rotation, and 3 is a guide. A female screw portion 5 is provided on the inner peripheral surface of a hollow rotor shaft 4 included in the drive motor 2. The wire 1 penetrates the rotor shaft 4, and the outer peripheral protruding teeth of the wire 1 are meshed with the female screw portion 5.

The guide 3 covers the opening of the guide frame 6 connected to the drive motor 2 with the guide cover 7, accommodates the guide roller 8 in the frame 6 rotatably, and integrates the bending guide portion 6a in the frame 6. Is provided and formed. 8a is a roller support shaft. The bending guide portion 6a is provided so as to face the outer circumference of the guide roller 8, and a bending passage 9 through which the wire 1 passes is formed between the bending guide portion 6a and the outer circumference.

In such a wire drive device, when the wire 1 is moved so as to be pressed against the outer circumference of the guide roller 8 by the operation of the drive motor 2, the guide roller 8 rotates, so that the friction resistance in the bending passage 9 is increased. Can be reduced, and thereby the efficiency of transmission of force from the drive motor 2 to the load can be improved.

[Problems to be Solved by the Invention] By the way, it is technically extremely difficult to hold the female screw portion 5 of the rotor shaft 4 and the wire 1 at the centers where they mesh with each other. The section has play. Therefore, when the drive motor 2 is operating, the wire 1
Makes a turning motion while meshing with the female screw portion 5.

On the other hand, in the above configuration, the end of the bent passage 9 on the drive motor 2 side is
The wire 1 moves linearly between 9a and the drive motor 2, but the wire 1 is in a free state in the part between these.

Therefore, the turning motion of the wire 1 generated at the meshing portion is amplified between the end 9a of the bent passage 9 on the drive motor 2 side and the drive motor 2. As a result, the wire 1
Motor-side passage 10 connected to the bent passage 9 of the guide frame 6
Guide cover 7 that blocks the inner surface of this and this passage 10.
On the other hand, since collisions are repeated, there is a problem that large vibration and noise are likely to occur.

An object of the present invention is to obtain an electric wire drive device that can reduce vibration and noise.

[Means for Solving the Problems] In order to achieve the above object, in an electric wire drive device of the present invention, a guide roller that is coupled to a drive motor and is rotatable, and faces the outer periphery of the guide roller. A guide formed with a bending guide portion that forms a bending passage through which the wire passes between the driving motor side end of the bending passage and the driving motor. A wire supporting portion that abuts a positioned wire portion is provided.

In order to increase the degree of freedom in designing the guide, the drive motor is arranged on the side opposite to the side of the guide roller opposite to the guide roller built-in opening of the guide frame of the guide. hand,
The guide frame may be bent between the end of the bent passage on the drive motor side and the drive motor, and the bent portion may form the wire support portion.

[Operation] According to the electric wire drive device of the first aspect, since the wire support portion is in contact with the wire portion extending from the bending path of the guide to the drive motor, the wire moves while being constantly pressed against the wire support portion. To be done. Therefore, the turning motion of the wire generated at the meshing portion is suppressed from being amplified between the end of the bending passage on the drive motor side and the drive motor, and the wire at the meshing portion of the wire and the drive motor is suppressed. Since the position of is fixed, the turning motion of the wire at the meshing portion can be suppressed.

Further, according to the electric wire driving device of the second aspect, since the wire supporting portion is formed by the bent portion of the guide frame, the force from the wire can be received by the guide frame.
Therefore, it is possible to design so that the guide roller built-in opening of the guide frame is not blocked, and when a guide cover that blocks the above-mentioned opening is provided, the cover can be made of a material of low strength, etc. The degree of freedom of can be increased.

[Embodiment] A first embodiment of the present invention will be described below with reference to FIGS. 1 to 5.

In the figure, 11 is a drive motor, which is a commutator motor capable of forward rotation and reverse rotation by switching the current direction. As shown in detail in FIG. 5, the motor 11 has bearings 13 provided at both ends of a motor frame 12, and
A permanent magnet stator 14 is mounted between the bearings 13 on the inner surface of the motor frame 12, and a rotor 15 having a rotor shaft 19 penetrating the stator 14 is housed in the motor frame 12 and the rotor 15 is rotated. It is formed by pressing a pair of brush devices 17 against a commutator 16 attached to a child 15. Each brush device 17 has an insulating member on the inner surface of one end of the motor frame 12.
It is attached through 18. The rotor 15 is the rotor shaft
The commutator 16 is attached to the outer surface of the rotor 19, the rotor core 15a is attached to face the stator 14, and the rotor core 15a
It is formed by winding a rotor coil 15b around the.

Both ends of a rotor shaft 19 included in the rotor 15 are rotatably supported by bearings 13. The rotor shaft 19 has a hollow pipe shape, and a female screw portion 20 is formed on a small diameter portion provided on the inner peripheral surface of one end portion of the rotor shaft 19.

Inside the rotor shaft 19, a screw-type flexible wire 21
Are threadedly engaged with the female screw portion 20 and penetrated therethrough. The wire 21 is provided with outer peripheral protruding teeth 21a (see FIGS. 4 and 5) on the outer periphery of the wire core material. The outer peripheral protruding tooth 21a is a member that meshes with the female screw portion 20, and is formed by a metal wire material such as a piano wire that is spirally wound around the outer circumference of the wire core material at a constant pitch.

The drive motor 11 has a guide 22 at one end thereof on the female screw 20 side.
It is provided so as to be connected to the guide frame 23. guide
Reference numeral 22 bends the middle portion of the wire 21 and guides the reciprocating movement of the wire 21. As shown in FIGS. 1, 2, and 4, the guide 22 is formed by including the guide frame 23 made of, for example, light metal or polyacetal resin, a guide roller 24 made of synthetic resin, and a guide cover 25.

The bent portion of the guide 22 is formed by including the guide roller 24 and a bent guide portion 26 provided so as to face the outer periphery of the guide roller 24. Guide roller 24 is fourth
As shown in the figure, it is rotatably attached to a rotor support shaft 27 fixed to a guide frame 23, and an outer peripheral surface thereof is provided with an annular groove 24a (see FIG. 4) into which a part of the wire 21 is fitted. Has been. The bending guide portion 26 is formed of a substantially arc-shaped portion formed in a part of the guide frame 23, and a bending passage 28 through which the wire 21 passes is formed between this and the outer periphery of the guide roller 24.

The guide frame 23 includes an end of the bent passage 28 on the drive motor 11 side.
Guide passage 2 from 28a (see FIG. 2) to drive motor 11
9 is formed. The guide cover 25 is attached to the guide frame 23 so as to cover the guide roller of the guide frame 23 and the opening of the guide passage 29 continuous with the guide roller. The cover 25 is waterproof and dustproof inside the guide 22.

The guide 22 is provided with a wire support portion 30 as shown in FIG. The support portion 30 has a curved passage 28.
Is provided so as to be located between the end 28a on the drive motor 11 side and the drive motor 11, that is, within the length range of the guide passage 29.

Specifically, with respect to the side surface of the guide roller 24, the drive motor 11 is disposed on the opening side of the guide frame 23 for incorporating the guide roller, and the guide 22 is bent. The bending angle θ is about 10 to 20 °. The bent portion of the guide cover 25 that closes the guide passage 29 forms the wire support portion 30.

Moreover, in the present embodiment, the ridge 25a projecting into the guide cover 25 and the guide passage 29 is provided on the inner surface of the guide cover 25, and the upper end portion thereof (the bending passage 28 on the drive motor 11 side in FIG. 1) is provided. The end portion near the end 28a) is a bent portion. Then, this bent portion and the ridge 25 continuous with this bent portion
Each of a is used as a wire support portion, which is in contact with the wire portion located in the guide passage 29.

A guide pipe 31 is connected to the guide 22 having the above structure (see FIG. 3). The guide pipe 31 is linearly arranged along the moving direction of the load, and one end of the guide pipe 31 is inserted into the guide base 23 to be connected. Moreover, the guide pipe 31 is provided with a slit-shaped groove 31a extending along the axial direction thereof. And this guide pipe 31
A part of the connector 32, which is connected to one end of the wire 21 passing inside, is inserted through the groove 31a. The connector 32 is connected to a load, for example, a window glass 33 of an automobile.

In the wire drive device having the above configuration, when the drive motor 11 is operated to rotate the rotor 15 in the forward direction, the wire 21 is engaged with the female screw portion 20 of the rotor shaft 19 and the outer peripheral protruding tooth 21a of the screw type wire 21. Thrust is applied to the
In FIGS. 2 and 3, the wire 21 is sent out above the drive motor 11. With this feeding, the wire 21 bends through the bending passage 28 and then slides downward in the guide pipe 31. Therefore, the wire 21 is a connector.
The window glass 33 is pulled down via 32 from the state of the two-dot chain line in FIG. 3 to the state shown by the solid line to open the window.

Further, when the rotor 15 of the drive motor 11 is rotated in the reverse direction, tension is applied to the wire 21 through the meshing between the female screw portion 20 of the rotor shaft 19 and the outer peripheral projecting tooth 21a of the screw type wire 21, and the second 3, the wire 21 is sent out toward the lower side of the drive motor 11. Wire 21
Slides upward in the guide pipe 31, so the window glass 33 is pulled up from the state of the solid line in FIG. 3 to the state shown by the chain double-dashed line in order to close the window. .

In this case, the wire 21 naturally passes through the bending passage 28 of the guide 22 while bending, but at that time, the wire 21 is moved so as to be strongly wound around the outer periphery of the guide roller 24, and , Along with it, the guide roller 24
Rotates around the roller support shaft 27.

Therefore, the frictional resistance between the wire 21 and the guide roller 24 can be reduced, and the drive motor 11 to the window glass 33
It is possible to improve the efficiency of transmission of force to. It should be noted that when the window glass 33 is opened, the weight of the window glass 33 can be utilized despite the fact that the blade 21 slides on the bending guide portion 26, and therefore the force transmission efficiency does not decrease so much. Further, as described above, when the window glass 33 is closed, the wire 21 can be prevented from sliding on the bent portion of the guide 22, so that noise at that time can be reduced. Not only that, this action can be maintained even if the diameter of the guide roller 24 is reduced, and
The curvature of the bent portion of 22 can be reduced, and the entire electric wire drive device can be downsized accordingly.

The wire supporting portion is provided in the wire portion positioned in the guide passage 29 of the wire 21 that is reciprocated as described above.
Since the wires 30 are always in contact with each other, the wire portion is reciprocated while being pressed against the wire support portion 30.

Therefore, the turning motion of the wire generated at the meshing portion between the wire 21 and the female screw portion 20 of the drive motor 11 is generated between the end 28a of the bending passage 28 on the drive motor 11 side and the drive motor 11, that is, in the guide passage 29. Amplification is suppressed. Furthermore, as described above, at the intermediate position of the guide passage 29, the wire support portion 30 and the wire 21 are in contact with each other,
The wire 21 at the meshing portion between the wire 21 and the drive motor 11
The position of is fixed. Therefore, the turning motion of the wire 21 at the meshing portion can be suppressed.

Therefore, it is possible to prevent the wire 21 from moving largely in the guide passage 29 and repeatedly colliding with the inner surface of the passage 29, so that vibration and noise accompanying it during driving can be reduced.

In the second embodiment shown in FIG. 6, the drive motor 11 is arranged on the side opposite to the side surface of the guide roller 24 opposite to the above-mentioned opening of the guide frame 23 for incorporating the guide roller, and the guide 22 is bent. There is. The bending angle θ is about 10 to 20 °. The bent portion of the guide frame 23 forms the wire support portion 30. In this embodiment as well, the protrusion 23a protruding into the guide passage 29 has the guide frame 23.
Is provided on the inner surface of the upper end portion (bending passage 28
The end portion on the side close to the end on the side of the drive motor 11) is a bent portion. Then, this bent portion and the ridges connected to this bent portion
Each of 23a is used as a wire supporting portion, and this is in contact with the wire portion located in the guide passage 29. Since the configuration other than the above is the same as that of the first embodiment including the not-illustrated portions, the same components are designated by the same reference numerals and the description thereof will be omitted.

According to the structure of the second embodiment, the intended purpose of the present invention can be achieved by the damping action of the wire supporting portion 30 on the wire 21. In addition, since the wire supporting portion 30 is provided on the guide frame 23, the pressing force of the moving wire 21 can be supported by the guide frame 23, and the pressing force is applied to the guide cover.
25 does not work. Therefore, the guide cover 25 can be omitted, and if the guide cover 25 is used as shown in FIG. 6 if necessary, the cover 25 can be made of an inexpensive material having low strength. Therefore,
There is an advantage that the degree of freedom in designing the guide 22 is high.

In the third embodiment shown in FIG. 7, the wire support portion 30 provided on the guide frame 23 in the configuration of the second embodiment is
The curved passage 28 is formed so as to have a gentle curve between the end on the drive motor 11 side and the drive motor 11, and the curved surface supports the wire 21. Since the configuration other than this point is the same as that of the second embodiment including the part not shown, the same components are designated by the same reference numerals and the description thereof will be omitted.

According to the structure of the third embodiment, not only the intended purpose of the present invention can be achieved, but also the movement of the wire 21 can be smoothed and the vibration damping action can be further enhanced.

The present invention is not limited to the above embodiments. For example, the wire support portion 30 does not have to be continuous in the moving direction of the wire 21, and may be partially provided. Also, guide 22
Without bending the guide frame 23 or the guide cover 25 on the inner surface of the guide supporting portion
May be provided.

[Effects of the Invention] Since the present invention is configured as described above, the following effects are achieved.

In the electric wire drive device according to claim 1, a guide roller that is connected to a drive motor and is rotatable, and a bending passage that is provided so as to face the outer circumference of the guide roller and through which the wire passes are provided between the guide roller and the outer circumference. A guide formed with a bending guide portion to be formed is provided with a wire support portion that abuts a wire portion located between the drive motor side end of the bending passage and the drive motor, It is possible to suppress the swinging motion of the wire generated at the meshing portion between the drive motor and the wire from being amplified between the motor-side end of the bent passage and the drive motor,
Since the turning motion of the wire at the meshing portion can be suppressed, vibration and noise can be reduced.

Further, in the electric wire drive device according to claim 2, the drive motor is arranged on the side opposite to the side surface of the guide roller opposite to the guide roller mounting opening of the guide frame of the guide. Is bent between the end on the drive motor side of the bent path and the drive motor, and the wire support portion is formed at the bent portion, so that the force from the wire can be received by the guide frame, Design freedom for the guide, such as a design that does not block the guide roller built-in opening of the guide frame, or if a guide cover that blocks the opening is provided, you can use a material of low strength for the cover. You can increase the degree.

[Brief description of drawings]

1 to 5 show a first embodiment of the present invention, FIG. 1 is a sectional view taken along the line I-I in FIG. 2, and FIG. FIG. 3 is a front view of the entire apparatus shown with a window glass, FIG. 4 is a sectional view taken along the line IV-IV in FIG. 3, and FIG. 5 is a sectional view of a drive motor. FIGS. 6 and 7 are sectional views corresponding to FIG. 1 and showing other different embodiments of the present invention. FIG. 8 and FIG. 9 show a conventional example, FIG. 8 is a front view of the entire apparatus showing a part of it in section, and FIG. 9 is a sectional view taken along the line IX-IX in FIG. 11 ... Drive motor, 19 ... Rotor shaft, 20 ... Female thread part, 21 ... Wire, 21a ... Outer peripheral protruding tooth, 22 ... Guide, 23 ... Guide frame, 23a ... Convex strip (wire support part), 24 ... Guide roller, 25 ... guide cover, 25a ... ridge (wire support part), 2
6 ... Bending guide part, 27 ... Roller support shaft, 28 ... Bending passage, 28a
... ends of curved passages, 29 ... guide passages, 30 ... wire support,
33 ... Window glass (load).

Claims (2)

[Claims] 1. A screw-type flexible wire, one end of which is connected to a load capable of reciprocating movement, and a female screw portion which penetrates the wire and meshes with an outer peripheral protruding tooth of the wire. A drive motor having a hollow rotor shaft provided on a surface thereof and capable of rotating in the forward and reverse directions; a guide roller which is connected to the drive motor and is rotatable; and an outer circumference of the guide roller which is provided so as to face the outer circumference of the guide roller. And a guide that guides the reciprocating motion of the wire, the end of the bending path on the side of the drive motor, An electric wire drive device, wherein the guide is provided with a wire support portion that abuts a wire portion located between the drive motor and the drive motor. 2. The drive motor is arranged on the side opposite to the side of the guide roller opposite to the guide roller built-in opening of the guide frame of the guide, and the guide frame is disposed on the drive motor side of the bent passage. The electric wire drive device according to claim 1, wherein the wire support portion is formed by bending the end of the wire and the drive motor.