Machine element or mechanism – Control lever and linkage systems – Multiple controlling elements for single controlled element
Patent
1994-03-28
1996-02-27
Marmor, Charles A.
Machine element or mechanism
Control lever and linkage systems
Multiple controlling elements for single controlled element
74475, 74538, 192 4A, B60K 4126
Patent
active
054939321
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a locking arrangement for a selector lever of a motor vehicle transmission. The locking arrangement includes a locking pin which is to be shifted manually and which is arranged to extend transversely to the selector lever which can be swivelled about an axis (A--A). The arrangement further includes a solenoid which, connected with an electronic circuit, moves a locking mechanism so as to block the locking pin and lock the selector lever.
A locking arrangement of the above-mentioned type is known from European Patent Document EP-0 307 846 A1. In this case, a selector lever, provided on its upper end with a push button that is to be operated manually, can be locked in predetermined positions. For this purpose, the selector lever is provided with a locking pin which extends transversely to the swivelling direction. The locking pin can be displaced in the axial direction of the selector lever by means of the push button, and engages in indentations of a connecting link which are assigned to the selector lever positions. In specific selector lever positions, a locking mechanism, which consists of a locking lever, is moved into the moving path of the locking pin by means of an electrically actuated lifting magnet. The selector lever is locked and cannot be swivelled because the locking pin is form-fittingly blocked in the indentation of the connecting link. A disadvantage of this type of construction is that the lifting magnet and the locking mechanism are space consuming. Furthermore, the lifting magnets required for a secure locking and unlocking are heavy and expensive.
There is therefore needed a locking low costs.
This need is met by a locking arrangement for a selector lever of a motor vehicle transmission. The locking arrangement includes a locking pin which is to be shifted manually and which is arranged to extend transversely to the selector lever which can be swivelled about an axis (A--A). The arrangement further includes a solenoid which, connected with an electronic circuit, moves a locking mechanism so as to block the locking pin and lock the selector lever. An electromagnetic clutch is arranged which consists of the solenoid constructed as the magnetic clamp and of the locking mechanism constructed as a check plate. The clutch, when it supplied with current, holds the check plate on the magnetic clamp via an electromagnetic holding force while it blocks the locking pin.
Arranging an electromagnetic clutch, which consists of a magnetic clamp and a movable check plate, on the selector lever permits a simple and compact construction of the locking arrangement. In the current-carrying condition, the check plate adheres to the magnetic clamp via an electromagnetic holding force. In this case, the locking pin of the selector lever is blocked by the check plate. The magnetic clamp is a commercially available component which is reasonable in price and, because of its small overall size, can be integrated into the selector lever. Instead of the individual magnetic clamp, a folding anchor magnet can be used as a constructional unit. The folding anchor is fastened to the magnetic clamp, acting as a check plate.
The locking arrangement is completely integrated into the selector lever and can be swivelled together with it. By use of the electronic circuit, the clutch can be closed in any selector lever position. A selector lever which is provided with this arrangement can therefore be adapted to various legal requirements as well as to different types of vehicles.
A preferred application of the present invention is use of the selector levers for automatic motor vehicle transmissions. However, this arrangement may also be used as a lock for the reverse gear of a manual transmission. Furthermore, this locking arrangement may be used in the case of selector levers which can be moved in parallel shifting channels of an H-shaped shifting system. In this case, the selector lever positions which are customary for automatic transmissions can be selected in one channel, while individual gears c
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Dr. Ing. h.c.F. Porsche AG
Grabow Troy
Marmor Charles A.
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