JPH0526323A - Power transmission device - Google Patents

Abstract

PURPOSE:To automatically release power transmission to a slider at the point of the time of the slide-stop of the slider. CONSTITUTION:This device is composed of a gear 13, rotated with a drive shaft 12 turning in both normal and reverse directions; first and second pinions 15 and 16, shaft-supported with both the ends of a support member 14 having the rotation center of the gear shaft to be engaged with the gear; a rack 20 provided on a slider 18; and an engagement-releasing apparatus 21, provided on the slider for releasing engagement after the engagement of the pinions and the rack is continued in a given range.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is capable of transmitting both forward and reverse rotations of a drive shaft to a driven side, but rotation from the driven side cannot be transmitted to a drive shaft. The present invention relates to a power transmission device having a directional clutch function.

[0002]

2. Description of the Related Art In order to open and close a door and a window by a motor, the motor is normally and reversely rotated to lock and unlock the door lock or to open and close the door.

However, the door lock and the opening and closing of the window are
Since it is desired that it can be manually operated, a manual operation force must be transmitted to the door lock device and the window opening / closing device independently of the drive by the motor. In this case, if the manual operation force is restricted by the power transmission system by the motor, the manual operation becomes impossible. Therefore, the power transmission system by the motor needs to be released during the manual operation.

Therefore, both the forward and reverse rotations from the motor side can be transmitted to the door lock device and the window opening / closing device, however, the operating force of the door lock device and the window opening / closing device by manual operation is transmitted to the motor. As a conventional technique devised so as not to occur, there is one disclosed in Japanese Patent Publication No. 2-61670.

[0005]

The driven wheel is interposed between the driven wheel and the driven shaft and is flexibly deformed while the driven wheel is rotated by a predetermined angle to give a restoring rotational force to the driven wheel. When the elastic member (torsion bar) or the planetary tooth ring is in contact with the driven wheel, the planetary wheel is allowed to rotate on the revolving structure.
In addition, when the planetary wheels are separated from the driven wheels, the structure is complicated by the restraining means (wave washer) that restrains the planetary wheels so as to rotate integrally with the revolving structure. Since many (sun gear, planetary gears, driven gears, etc.) are used, there is a problem such as a cost increase.

SUMMARY OF THE INVENTION An object of the present invention is to provide a power transmission device which has a simple structure and does not require many kinds of gears.

[0007]

In order to solve the above problems, the present invention provides a gear rotated by a drive shaft that rotates in both forward and reverse directions and both ends of a support member having the shaft of the gear as the center of rotation. A first pinion and a second pinion that are supported by bearings and meshed with the outer peripheral facing position of the gear, a slider that intersects the axis of the first gear at a right angle with the sliding direction, and a slider on the side surface of the gear that slides in the sliding direction. After the engagement between the rack provided in parallel and the one pinion of the support member that rotates together in the same direction by the rotation of the drive shaft and the rack is maintained for a predetermined range, the slider is released to release the engagement. The power transmission device including the disengagement device provided in the.

[0008]

With the forward rotation of the drive shaft, the support member is rotated in the same direction to engage the first pinion on one end side of the support member with the rack. Since the first pinion meshed with the rack receives the rotation transmission from the gear, the slider slides in the forward direction.

After the engagement between the rack and the first pinion is maintained within a predetermined range, the engagement release device integrated with the slider causes the engagement between the rack and the first pinion (of course, the engagement of the second pinion with the rack is Absent)
Since it is released, the slider will stop moving forward.

When the drive shaft is rotated in the reverse direction, the second pinion meshes with the rack as described above, so that the slider slides in the backward direction.

When the mesh release device releases the mesh between the rack and the second pinion, the backward movement of the slider is stopped.

[0012]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 shows an embodiment of a lock device,
The front wall 2 of the mounting lock box 1 is provided with a through window 3,
Further, at the tip of the sliding plate 4 incorporated in the lock box 1, the through window 3
1 is provided with a lock plate 5 that penetrates through, and when the rocking body 6 is rotated clockwise in FIG. 1 by a key inserted into a cylinder lock (not shown), the tip of the rocking body 6 and the notch 7 of the sliding plate 4 are formed. Are engaged with each other to move the lock plate 5 forward together with the sliding plate 4, lock the lock plate 5 with the protruding lock plate 5 (shown in FIG. 9), and rotate the rocking body 6 counterclockwise in FIG. The lock plate 5 is retracted together with the moving plate 4 to unlock (shown in FIG. 1). That is, the lock and unlock operations can be manually performed.

A gear 13 is attached to the drive shaft 12 which rotates in the forward and reverse directions by the operation of the reversible motor 11 incorporated in the lock box 1.
Is provided.

Further, the drive shaft 12 is provided with a support member 14 having the drive shaft 12 as a turning center, and the first pinion 15 and the second pinion 16 supported on both ends of the support member 14 are provided with the gear 13 respectively. Has been bitten into. In the illustrated case, the supporting member 14 uses two parallel plate-shaped members,
The drive shaft 12 is inserted into the through hole 17 provided in the center between both ends of the plate-like body.
Is penetrated.

Further, inside the lock box 1, there is provided a slider 18 whose sliding direction intersects the axis of the drive shaft 12 at a right angle. In the illustrated case, the guide device 19 of the slider 18 is composed of a long hole provided in the slider 18 and a pin which penetrates the long hole and is fixed to the lock box 1.

A rack 20 is provided on the surface of the slider 18 on the gear 13 side in the sliding direction of the slider 18.

Further, the slider 18 has a predetermined range of meshing with the rack 20 of one of the first pinion 15 and the second pinion 16 of the support member 14 which rotates in the same direction as the drive shaft 12 rotates. A disengagement device 21 is provided which automatically disengages the above-mentioned engagement after being maintained for a predetermined slide amount).

In the illustrated disengagement device 21, an elliptical through hole is provided between both ends of a projecting piece projected from the slider 18 in the figure, and the drive shaft 12 of the gear 13 arranged in parallel with the through hole, Although the shaft 22 of the first pinion 15 and the second pinion 16 is configured to penetrate therethrough, a cam rail or the like may be used.

With the above construction, when the drive shaft 12 is rotated in the forward direction by the operation of the motor 11, the support member 14 is rotated in the same direction, so that the rack 2 as shown in FIG.
The first pinion 15 is released with respect to 0, and the second pinion 16 is engaged with the rack 20.

As a result, the slider 18 moves forward in the right direction in FIG. 6 due to the engagement of the rack 20 and the second pinion 16 which receives the rotation transmission from the gear 13. At this time, the shaft 22 of the first pinion 15 is in contact with the upper edge of the through hole forming the meshing release device 21.

When the forward movement of the slider 18 reaches a predetermined length, however, the shaft 22 of the first pinion 15 is pushed down by the edge of the through hole to forcibly rotate the support member 14 counterclockwise in FIG. Therefore, as shown in FIG. 7, the engagement between the rack 20 and the second pinion 16 is released (neutral state). Therefore, the forward movement of the slider 18 is stopped.

When the slider 18 is retracted,
The drive shaft 12 is reversely rotated by the operation of the motor 11,
As shown in FIG. 8, the first pinion 15 may be engaged with the rack 20.

Stopping the backward movement of the slider 18 is the same as described above.

The operation of the motor 11 accompanying the stop of the slider 18 may be stopped by operating a limit switch (not shown) by the slider 18.

As for locking and unlocking with the slide of the slider 18, as shown in FIGS. 1 and 9, the pin 25 of the rocking member 6 is inserted into and engaged with the long hole 24 of the piece 23 protruding from the slider 18. I am allowed to do it.

Although the embodiment of the present invention is used for a door lock, it may be used for a window opening / closing device or other power transmission.

In the figure, reference numeral 26 designates the central portion of one side on the drive shaft 12,
A leaf spring having both ends of the other surface circumscribed on the shaft 22 stops rotation of the shaft 22 due to vibrations by the leaf spring 26.

[0029]

As described above, according to the power transmission device of the present invention, the slider is moved forward by the forward rotation of the drive shaft, and the slider is retracted by the reverse rotation of the drive shaft, and the rack is stopped at the slide stop position of the slider. Since the engagement between the pinion and the pinion is released, the function of the one-sided clutch is achieved and the structure is simplified.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of the present invention.

FIG. 2 is a sectional view taken along line XX of FIG.

FIG. 3 is an enlarged front view showing the main part of the above.

[Fig. 4] Bottom view of the cutaway part

FIG. 5: Action diagram

[Fig. 6] Same action diagram

FIG. 7: Same action diagram

FIG. 8: Same action diagram

FIG. 9 is a front view of a locked state.

[Explanation of symbols]

 1 Lock Box 2 Front Wall 3 Through Window 4 Sliding Body 5 Lock Plate 6 Oscillating Body 7 Notch 12 Drive Shaft 13 Gear 14 Support Member 15 First Pinion 16 Second Pinion 18 Slider 20 Rack 21 Engagement Device

Claims (1)

Claim: What is claimed is: 1. A gear that is rotated by a drive shaft that rotates in both forward and reverse directions, and a support member that has the shaft of this gear as the center of rotation and is supported by both ends of the gear at opposite positions on the outer periphery of the gear. A first pinion and a second pinion meshed with each other, a slider whose sliding direction intersects the axis of the first gear at a right angle, a rack provided on the side surface of the gear parallel to the sliding direction, and the drive unit. Power composed of a disengagement device provided on the slider so as to release the engagement after the engagement between the one pinion of the support member and the rack which rotate together in the same direction by the rotation of the shaft is maintained within a predetermined range. Transmission device.