Device for locking an automatic gearbox of a motor vehicle in the park position
AssigneeDura Automotive Systems, Inc.
InventorSebastien Maitre
Life of this patent
Estimating the term…
Abstract
A carriage acted-on by a control system controlled by a part of the gearbox, so as to be moved sideways in relation to a locking rod able to interoperate with a toothed crown built into the said gearbox, with the said carriage being coupled to means operated by an actuator so as to be moved, if necessary, into a fixed position of the control system, characterized by the fact that the means consist of two superimposed compact levers and mounted so as to pivot on an axis against a torsion spring, with one of the levers being coupled to the carriage while the other lever is coupled to the control system.
Claims16
A device for locking a motor vehicle automatic gearbox in Park position comprising:
- a carriage acted-on by a control system controlled by a part of the gearbox, so as to be moved sideways in relation to a locking rod able to interoperate with a toothed crown built into said gearbox,
- two superimposed compact levers mounted so as to pivot on a pivot pin against a torsion spring mounted on the pivot pin,
- one of the levers being a carriage lever coupled to the carriage while the other lever is a control system lever coupled to the control system,
- the carriage lever cooperating with a locking pin operated by an actuator,
- the spring mounted on the pivot pin between the two levers to enable a simultaneous angular movement of said levers, or of one of the levers in relation to the other lever in a fixed position,
- the control system lever having an indexing finger able to interoperate, according to a selected position of the control system, with complementary shapes in a mounting plate in which said control system lever and carriage lever are mounted with pivoting capability, and
- when the control system and carriage levers are engaged in the park position, the locking rod is engaged in a notch of the toothed crown, the control system is in the reverse gear position, and the actuator is powered, the control system lever is indexed in the reverse gear position in the plate, and the carriage is brought forward onto the locking rod under the effect of movement of the carriage lever bearing against the locking pin when the actuator is powered down.
A device for locking a motor vehicle automatic gearbox in Park position, incorporating a carriage acted-on by a control system controlled by a part of the gearbox, so as to be moved sideways in relation to a locking rod able to interoperate with a toothed crown built into said gearbox, with said carriage being coupled to a mechanism actuated by an actuator so as to be movable into a fixed position of the control system, characterized by the fact that
- the mechanism comprises two superimposed compact levers mounted so as to pivot on a pivot pin against a torsion spring mounted on said pivot pin, with one of the levers being a carriage lever coupled to the carriage while the other lever is a control system lever coupled to the control system,
- the control system lever has an indexing finger able to interoperate—according to a selected position of the control system—with complementary shapes in a mounting plate, in which said control system lever and the carriage lever are mounted with pivoting capability, and
- when the control system and carriage levers are engaged in the park position, the locking rod is engaged in a notch of the toothed crown, the control system is in the reverse gear position, and the actuator is powered, the control system levers is indexed in the reverse gear position in the plate, and the carriage is brought forward onto the locking rod under the effect of movement of the carriage lever bearing against the locking pin when the actuator is powered down.
Dependencies are inferred from the claim text.