Abstract:
A jackscrew apparatus (10) for converting reciprocal rotational motion into reciprocal linear motion includes a nut (12) threaded on a screw (14) for reciprocal translational motion and against rotational motion. A motor (16) is connected to the screw (14) and reversibly rotates the screw (14) about a longitudinal screw axis (18) to drive the nut (12) through its reciprocal translational motion. A lost motion drive linkage (20) is connected between the motor (16) and the nut (12) and allows lost rotational motion between the motor (16) and the nut (12). The lost rotational motion allows the motor (16) to accelerate before bearing the load of rotating the screw (14) and driving the translational motion of the nut (12).
Abstract:
A vehicle door latch (10) has a forkbolt (24), a detent (26) that holds the forkbolt in a latched position, a manually operated release mechanism that moves the detent to release the forkbolt, a lock mechanism for disabling the release mechanism, a double lock mechanism and a power operated unlatching mechanism (200) that moves the detent (26) to release the forkbolt (24) independently of the manually operated release mechanism, the lock mechanism and the double lock mechanism. The power operated unlatching mechanism (200) includes a power unlatching lever (202) and a motor driven actuator (203) having a jackscrew (208) for moving the power unlatching lever.
Abstract:
A vehicle door latch has a forkbolt (24), a detent (26) that holds the forkbolt in a latched position, a release mechanism that moves the detent to release the forkbolt and a lock mechanism for disabling the release mechanism. The detent is moved by an intermittent lever (46) that is part of the release mechanism and part of the locking mechanism. A lock lever (56) forming part of the lock mechanism moves the intermittent lever back and forth between an unlock position where the intermittent lever drives the detent to release the forkbolt and a lock position where the intermittent lever free wheels with respect to the detent. The intermittent lever (46) is pivotally connected to an unlatching lever (44) of the release mechanism that is operated by inside and outside release levers (68, 60). The lock lever (56) includes a lower lock lever (82), an upper lock lever (84) and a spring (86) that stores energy when the lower lock lever pivots with respect to the upper lock lever. The lock mechanism includes an inside lock lever (96) and an outside lock lever (106) for operating the lower lock lever. The door latch also includes a motor driven actuator assembly (92) for operating the lock mechanism and a double lock assembly (104) for disabling the lock assembly so that the door latch cannot be unlocked by the inside lock lever (96).
Abstract:
A vehicle door latch has a forkbolt (24), a detent (26) that holds the forkbolt in a latched position, a release mechanism that moves the detent to release the forkbolt and a lock mechanism for disabling the release mechanism. The detent is moved by an intermittent lever (46) that is part of the release mechanism and part of the locking mechanism. A lock lever (56) forming part of the lock mechanism moves the intermittent lever back and forth between an unlock position where the intermittent lever drives the detent to release the forkbolt and a lock position where the intermittent lever free wheels with respect to the detent. The intermittent lever (46) is pivotally connected to an unlatching lever (44) of the release mechanism that is operated by inside and outside release levers (68, 60). The lock lever (56) includes a lower lock lever (82), an upper lock lever (84) and a spring (86) that stores energy when the lower lock lever pivots with respect to the upper lock lever. The lock mechanism includes an inside lock lever (96) and an outside lock lever (106) for operating the lower lock lever. The door latch also includes a motor driven actuator assembly (92) for operating the lock mechanism and a double lock assembly (104) for disabling the lock assembly so that the door latch cannot be unlocked by the inside lock lever (96).
Abstract:
The door latch (10) has a rotatable fork bolt (30) that engages a striker pin (91). A detent (32) is pivotable into engagement with the fork bolt to latch the door latch. An intermittent lever (34) is pivotally attached to the detent. An unlatching lever (44) has an ear (46) that is pivotable into contact with a tab (48) on the intermittent lever to release the fork bolt. A pivotable locking lever (40) has a slot (41) that pivotally receives a pivot pin (38) on the intermittent lever. A cam surface (152) on the fork bolt engages the detent and moves the intermittent lever away from the fork bolt when the fork bolt is rotated toward a latched position by the striker pin. A cam follower (160) on the intermittent lever follows a cam surface (162) on the unlatching lever and moves the locking lever to an unlocked position. Holding an outside door handle in an open position when the door is closed moves the cam surface on the unlatching lever out of contact with the cam follower and leaves the locking lever locked.
Abstract:
A jackscrew apparatus (10) for converting reciprocal rotational motion into reciprocal linear motion includes a nut (12) threaded on a screw (14) for reciprocal translational motion and against rotational motion. A motor (16) is connected to the screw (14) and reversibly rotates the screw (14) about a longitudinal screw axis (18) to drive the nut (12) through its reciprocal translational motion. A lost motion drive linkage (20) is connected between the motor (16) and the nut (12) and allows lost rotational motion between the motor (16) and the nut (12). The lost rotational motion allows the motor (16) to accelerate before bearing the load of rotating the screw (14) and driving the translational motion of the nut (12).
Abstract:
A vehicle door latch (10) has a forkbolt (24), a detent (26) that holds the forkbolt in a latched position, a manually operated release mechanism that moves the detent to release the forkbolt, a lock mechanism for disabling the release mechanism, a double lock mechanism and a power operated unlatching mechanism (200) that moves the detent (26) to release the forkbolt (24) independently of the manually operated release mechanism, the lock mechanism and the double lock mechanism. The power operated unlatching mechanism (200) includes a power unlatching lever (202) and a motor driven actuator (203) having a jackscrew (208) for moving the power unlatching lever.
Abstract:
The door latch (10) has a rotatable fork bolt (30) that engages a striker pin (91). A detent (32) is pivotable into engagement with the fork bolt to latch the door latch. An intermittent lever (34) is pivotally attached to the detent. An unlatching lever (44) has an ear (46) that is pivotable into contact with a tab (48) on the intermittent lever to release the fork bolt. A pivotable locking lever (40) has a slot (41) that pivotally receives a pivot pin (38) on the intermittent lever. A cam surface (152) on the fork bolt engages the detent and moves the intermittent lever away from the fork bolt when the fork bolt is rotated toward a latched position by the striker pin. A cam follower (160) on the intermittent lever follows a cam surface (162) on the unlatching lever and moves the locking lever to an unlocked position. Holding an outside door handle in an open position when the door is closed moves the cam surface on the unlatching lever out of contact with the cam follower and leaves the locking lever locked.