Abstract
A lock actuator feed port has a housing adjacent to the lock, a reversible electric motor in the housing having an output shaft extending along a motor shaft and an input gear fixed to the output shaft and thus rotatable about the axis of the engine. A threaded spindle which extends in the housing along an axis of the spindle adjacent to the motor shaft carrying an output gear and a threaded nut on the shaft is movable along the axis of rotation of the screw spindle between a pair axially displaced positions. A link connected between the nut and the lock can move the lock between its locked and unlocked positions on the displacement of the nut between its extreme positions. A manual actuator, such as a button inside the door lock is coupled to the nut to move the nut manually between its extreme positions. A rocker pivotable about the axis of Axia input gear carries a pair of connecting gears flanking and meshing with the input gear. This rocker is pivotable between angular positions in each of which a respective one of connecting gears meshing with the output gear and through a central position with none of the connecting gears meshing with the output gear. A spring urges the rocker at the center position, so that the torque transmitted to the rocker in rotation pivots rocker input gears depending on the direction of rotation of input-gear in one of its angle positions to couple the input gear to the output gear.
Description
Field of the Invention
The present invention relates to an actuator for a power door lock. More particularly, this invention relates to such a drive device used in a door lock of a motor vehicle and having a manual operation.
Background of the Invention
As described in U.S. Patent common property. No. 5,056,343 issued Oct. 15, 1991 a lock motor vehicle has an operating lever movable between a position in which a respective door of the vehicle is locked and a position in which the respective door is unlocked. A locking button connected to the lever is accessible from inside the vehicle for moving the lever between its positions. The actuator has a housing mounted directly on the bolt of the door and formed with at least one longitudinally facing abutment face, a motor in the housing, a nut longitudinally movable in the engine housing between unlocked, locked, and positions theft, and a slide in mobile housing nut between locked and unlocked positions and formed with a recess for receiving a protruding portion of the lever. At least one flexible arm extending longitudinally from the slider and having a head formed with a longitudinally extending face opposite the bearing face of the housing. These faces facing longitudinally, but are out of line with each other in longitudinal positions and the carriage lock nut. A line drive nut engageable with the arm laterally to deflect elastically arm on the displacement of the respective nut locked to the lock position. Thus, the faces are aligned longitudinally and prevent displacement of the slide in the unlocked position with the lock nut th position.Such lock has a manually operated so that in the locked and unlocked positions the slide can be moved manually. While this system is quite effective, manual feed on the performance alters the timing of the meeting. Thus, once, for example, a door that is locked by power actuator has been unlocked manually, it is necessary to cycle power actuator through the locked position to lock the parts again in positions the right with respect to the other.
Objects of the Invention
SUMMARY OF THE INVENTION
The present invention is used in combination with a door lock movable between a locked position and an unlocked position. Is a driving device having a housing adjacent to the lock, a reversible electric motor in the housing having an output shaft extending along a motor shaft and an input gear fixed to the shaft output and thereby rotatable about the axis of the engine. A threaded spindle which extends in the housing along an axis of the spindle adjacent to the motor shaft carrying an output gear and a threaded nut on the shaft is movable along the axis of rotation of the screw spindle between a pair axially displaced positions. A link connected between the nut and the lock can move the lock between its locked and unlocked positions on the displacement of the nut between its extreme positions. A manual actuator, such as a button inside the door lock is coupled to the nut to move the nut manually between its extreme positions. A rocker pivotable about the shaft axis in the input pinion gear carries a pair of parallel axes centered connection to the shaft axis and meshed with both flanking and input gear. This rocker is pivotable between a position at an angle to one of the connecting gears meshing with the output gear and a position at an angle to the other connecting gear meshing with the output gear and through a position None of the central connecting gears meshing with the output gears. A spring urges the rocker at the center position, so that the torque transmitted to the rocker in rotation pivots rocker input gears depending on the direction of rotation of input-gear in one of its angle positions to couple the input gear to the output gear.Thus, with this engine system operation automatically couples one of the gears connecting to the output gear, but when the motor is not energized and rotation of the input gear none of these connection gear meshes with the output gear , and the input gear meshes with the gear never output. Therefore, the element can be moved manually operated nut but the engine can take care of moving in any position without having to re-synchronize the positions of the parties.According to another feature of the invention, the rocker is U-section and has a pair of longitudinally extending sides, through which extends the output shaft and that flank the entrance and gears connecting. Furthermore, the motor shaft and the screw shaft are parallel and define a plane and the spring is a compression spring braced between the rocker and the housing and generally centered in the plane.The bond of this invention is a lever pivoted to the housing and having one end connected to the nut.Brief Description of the DrawingsThe foregoing and other objects, features and advantages will become more readily apparent from the following, referring to the accompanying drawing in which:. Figure 1 is a schematic vertical section through part of the actuator of the present invention, and. Figure 2 is a section taken along line II - II of FIG. 1.Specific descriptionAs seen in the drawing of a power actuator has a housing 8 in which is mounted a motor 1 having an output shaft 2 extending along an axis of shaft 2A. The engine 1 is a reversible electric motor operated by a standard central locking system 16 and serves to switch from a door lock 15 is shown schematically in between a locked and unlocked position and, if desired, in a position not burglar illustrated.The shaft 2 has an input gear or pinion small diameter 3. An output gear 4, which is separated from and out of mesh with the gear 3 is performed on a threaded spindle 5 in the housing 8 rotatable about an axis parallel to the axis 2A 5A and carrying a nut 6 and is constrained against rotation engages the upper end of an operational link or of the lever 7. The door lock 15 is coupled to an unillustrated shaft installed in the center of the lever 7 in its pivot axis 7A and manual actuation of a button or element 14 is coupled to the lower end of this lever 7. The movement of the nut 6 between their extreme positions of which are shown in Fig. 1 in solid lines and one in dashed lines, pivots the lever 7 and moves the lock 15 between its locked and unlocked positions. Similarly manual actuation of the lever 7 by the element 14 can lock and unlock the door controlled by the lock 15.According to the invention, a rocker 9 is pivotable about the axis 2A. It has two longitudinally extending sides or flanks 12 which are traversed by the axis 2 and a back wall or web 13 connecting the sides 12. Registration with these sides 12 at both sides of input gear 3 are identical or gears connecting gear 10 in permanent mesh with the gear 3. A compression spring 11 centered in a plane defined by the axes P 2A and 5A is compressed between the housing 8 and the rear wall 13 to normally urge the rocker 9 in the center line position of FIG. Two.This rocker 9 thus can be moved from the solid line center position illustrated in two angular positions, one of which is shown in Fig. 2 in dash-dotted lines. When in any of these angular positions of the respective gear 10 meshing with the gear 4 and forms a torque-transmitting engagement between the gears 3 and 4. When the continuous line center position no significant connection between the gears 3 and 4, ie the gear 4 can rotate freely with respect to the drive sprocket 3.Therefore power for driving the nut 5 to the motor shaft 2 is rotated, for example, in the direction of clockwise. Because of the inevitable friction between the parties in September rocker, this will have the effect of pushing down the right side rocker 9 and lifting your left side, as shown in Fig. 2, so that the connecting equipment on the right 10, which rotates counterclockwise in mesh with the gear 4. Therefore, the result is rotation clockwise gear 4 and the spindle 5. As soon as the engine 1 stops, the spring 11 returns the rocker 9 and the center line position and disengaging the gear 10 of the right wheel 4. Opposite rotation gear 3 is opposite tilt the rocker 9 and take the train left 10 to mesh with the gear 4 and oppositely rotating it.When the engine 1 is not running and, therefore, the rocker 9 is in the central position with the gears 10 and 4 uncoupled manually actuating the lock 15 is possible simply by turning the lever 7 to the force on the nut 6 and turn the shaft 5. No matter what the position of the nut 6 on the shaft 5, the power drive, which is controlled by the end position switches on the various parts of locks, you can take control at any time without having to re-synchronize device positions.
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