Abstract: A brake arrangement for a machine that includes a locking element adapted to engage with an output shaft from a gearbox. The gearbox comprising at least two gearwheels utilized to obtain different gears. A gear clutch is provided for each gearwheel and is adapted to engage and disengage a respective gearwheel depending on the operating conditions of the machine. A control unit is arranged to control the gear clutches so that the gear clutches simultaneously engage at least two of the gearwheels thus to braking the output shaft. The control unit is adapted to control the locking element so that the locking element engages with the output shaft when the output shaft is at a standstill thereby causing the output shaft to be prevented from rotating when the locking element engages with the output shaft.

Abstract: A gearbox for a motor vehicle having at least one input shaft and one output shaft and including a plurality of gears. The gears can be engaged and disengaged by an actuator. The gearbox further includes a parking brake that can be actuated by a gear change actuator and that serves to block rotation of the output shaft. The parking brake can be a gear and pawl arrangement in which the pawl is selectively engageable with the gear to prevent gear rotation, or it can be in the form of a shiftable jaw clutch.

Abstract: An emergency release device for the parking lock of a motor vehicle is described which contains an locking device (46,44,38,24,12,10) that is pressed into its engaged position by a spring element (42,50) and which can move into its disengaged position by at least one actuator (46) that is actuated by a control element (56,58) against the spring force. The locking device (46,44,38,24,12,10) can be linked with a clutch pedal located on the operator's station by releasable mechanical connecting elements (108,110,112), in such a way that it is possible to emergency-release the parking lock in case of vehicle malfunction.

Abstract: A compact drive unit for actuating parking brakes is provided The drive unit has a reduction gear that is formed by a two-stage belt drive, in combination with a drive motor that is made up of a brushless direct current motor The two-stage belt drive preferably consists of two toothed belt drives functionally arranged in series; the direct current motor preferably has an external rotor with a rare-earth magnetic ring.

Abstract: A cam plate is axially supported on an actuator shaft (cam shaft) arranged in a housing, perpendicularly to a pinion shaft so that it can rotate about the cam shaft. As the cam plate rotates, an engagement piece sways in conformity with the cam shape of the cam, so that a claw of the engagement piece can become engaged with or disengaged from a parking gear, whereby parking lock is locked or released.

Abstract: A control device for the parking lock of a motor vehicle has at least one actuating drive (46) that can be operated by triggering devices and with which a locking device (11) can be moved between engaged and disengaged positions. For reliable operation, at least two independent triggering devices are provided and a change in position takes place only if both triggering devices (56, 58) are actuated. Preferably a hydraulic piston (46) brings the parking lock into its disengaged position when subjected to pressure. The triggering devices are constructed as solenoids (56, 58) under the control of two electrical controllers (140, 142) that undertake an evaluation of relevant control and measurement parameters.

Abstract: The invention relates to a latch arrangement for a vehicle. The latch arrangement includes a latch element which cooperates with a gear wheel that is rotatable in a gear box. When the latch element is inserted between two teeth of the gear wheel, the vehicle is prevented from moving. The gear box includes a control unit connected to a gear lever. The control unit controls the gear box in relation to the setting of the gear lever. The control unit is able to guide the latch element to the position inserted between the teeth should the connection between the control unit and the gear lever become interrupted.

Abstract: When the claw of the engagement piece abuts the raised portion of the lock gear, the engagement piece cannot move further and is held off at the position. When the lock gear turns a small amount then the indentation (indented portion between gear teeth on the periphery) meets the claw. At this event, the slider piece moves as it is sliding along the guide cam by the elastic force of the coil spring until the slider piece abuts the spacer. The claw of the engagement piece meshes the lock gear so that the power output shaft is fixed or will not turn whereby the wheel shafts are locked.

Abstract: Parking lock which on the basis of an actuating signal triggered by the driver via an actuating device is engaged and disengaged by the fact that a piston (6) causes a detent disc (2) to rotate in such a way that, via a connection (19), a lock (17) is actuated which engages or disengages the parking lock. When engaged, the parking lock can be unlocked via a manual actuating device (13) causing an emergency release disc (3) to rotate by the fact that a bolt (4) likewise causes the detent disc (2) to rotate and then engages a detent unit (14) which maintains the parking lock in unlocked state. By repeated application of a hydraulic force to the actuating device (7) the detent unit (14) can be automatically disengaged by the detent disc (2) being caused to rotate.

Abstract: Parking brake, notably for automatic transmissions of motor vehicles, which is released via hydraulic pressure acting on a spring accumulator (3) and which is additionally held in the released state by a locking system (13) is actuated by a magnet (5) through which a current flows. The locking system (13) is kept activated and thus the parking brake released until the magnet (5) in the position in which the locking system (13) is actuated, has a power consumption lower than necessary for loading the locking system (13).

Abstract: A parking mechanism for an automatic transmission includes a manual control shaft rotationally supported by a transmission housing, the manual control shaft cooperating with a shift lever, a detent plate mounted on the manual control shaft, an annulus gear formed on a transfer gear of the transmission, and a sprag interposed between the detent plate and the annulus gear, the sprag pivoting a fulcrum shaft which is fixed to the transmission housing.

Abstract: The invention comprises a park mechanism for an automatic transmission comprising a toothed wheel secured to the torque output shaft of the transmission and a park pawl mounted pivotally on a transmission housing. The pawl has a pawl tooth engageable with tooth spaces on the toothed wheel, thereby locking the transmission torque output shaft against rotary motion. Torsional damper elements are carried by the torque output shaft and by the toothed wheel. Damper elements are located between registering radial extensions of the toothed wheel on the inside diameter of the toothed wheel and on a hub that is secured drivably to the torque output shaft, thereby permitting limited toothed wheel motion relative to the torque output shaft cushioning inertia forces as the pawl tooth engages a tooth space on the toothed wheel.

Abstract: A control device for the parking lock of a motor vehicle has at least one actuating drive (46) that can be operated by triggering means and with which a locking device (11) can be moved between engaged and disengaged positions. For reliable operation, at least two independent triggering means are provided and a change in position takes place only if both triggering means (56, 58) are actuated. Preferably a hydraulic piston (46) brings the parking lock into its disengaged position when subjected to pressure. The triggering means are constructed as solenoids (56, 58) under the control of two electrical controllers (140,142) that undertake an evaluation of relevant control and measurement parameters.

Abstract: A parking lock device comprises a parking lock mechanism (12) which locks an output shaft (1A) of a vehicle automatic transmission (1) when a shift lever (18) is changed over to a parking range, and an automatic brake device (14) which brakes the vehicle. When the shift lever (18) is changed over to the parking range at a vehicle speed is not less than a predetermined vehicle speed VSP1, a control unit (15) first operates the automatic brake device (14) to decelerate the vehicle and then operates the parking lock mechanism (12) after the vehicle speed has dropped to less than the predetermined vehicle speed VSP1. By this deceleration, the shock given to the vehicle by locking the output shaft (1A) while the vehicle is running is suppressed. The load of the parking lock mechanism due to the locking of the output shaft (1A) is also alleviated.

Abstract: The invention relates to a latch arrangement for a vehicle. The latch arrangement includes a latch element which cooperates with a gear wheel that is rotatable in a gear box. When the latch element is inserted between two teeth of the gear wheel, the vehicle is prevented from moving. The gear box includes a control unit connected to a gear lever. The control unit controls the gear box in relation to the setting of the gear lever. The control unit is able to guide the latch element to the position inserted between the teeth should the connection between the control unit and the gear lever become interrupted.

Abstract: A parking apparatus of an automatic transmission is provided to enable movement of the select lever from P range to another range to be realized more smoothly. A parking apparatus of an automatic transmission includes a parking gear assembly comprising an inner rotating member fixed to an output shaft of the transmission and an outer rotating member with indents formed on an outer circumference, the outer rotating member being rotatably disposed the inner rotating member, a parking rod assembly comprising a projection, the projection being interlocked with one of the indents in a parking “P” range, and a device for generating a rotational displacement between the inner rotating member and the outer rotating member when the projection is released from the indent.

Abstract: A cam plate is axially supported on an actuator shaft (cam shaft) arranged in a housing, perpendicularly to a pinion shaft so that it can rotate about the cam shaft. As the cam plate rotates, an engagement piece sways in conformity with the cam shape of the cam, so that a claw of the engagement piece can become engaged with or disengaged from a parking gear, whereby parking lock is locked or released.

Abstract: When the claw of the engagement piece abuts the raised portion of the lock gear, the engagement piece cannot move further and is held off at the position. When the lock gear turns a small amount then the indentation (indented portion between gear teeth on the periphery) meets the claw. At this event, the slider piece moves as it is sliding along the guide cam by the elastic force of the coil spring until the slider piece abuts the spacer. The claw of the engagement piece meshes the lock gear so that the power output shaft is fixed or will not turn whereby the wheel shafts are locked.

Abstract: A parking pawl assembly 10 is provided for use in combination with a vehicle of the type including a transmission assembly 12 having an output shaft 14, a park gear 16, and a shifter or shifting assembly 18, which is operatively and selectively used to actuate a conventional park rod 20 in a known and conventional manner. The parking pawl assembly 10 includes a selectively and pivotally movable pawl member 22, a generally cylindrical hub member 24, which is fixedly coupled to park gear 16, a cam assembly 26, which is fixedly coupled to pawl member 22 and which abuttingly engages hub member 24, and a return spring 28 which is operatively coupled to cam assembly 26. Cam assembly 26 ensures that pawl member 22 consistently engages park gear 16 at a relatively constant speed, and further ensures that a spring 42 within park rod 20 is compressed each time the transmission 12 is shifted into “park”.

Abstract: A parking pawl assembly 10 is provided for use in combination with a vehicle of the type including a transmission assembly 12 having a park gear 16. Assembly 10 includes a pawl member 22 which is selectively movable and which allows the park gear 16 to rotate while pawl member 22 is being disengaged from the park gear 16, thereby gradually and smoothly releasing residual torque stored within the park gear 16.

Abstract: A parking mechanism for an automatic transmission includes a manual control shaft rotationally supported by a transmission housing, the manual control shaft cooperating with a shift lever, a detent plate mounted on the manual control shaft, an annulus gear formed on a transfer gear of the transmission, and a sprag interposed between the detent plate and the annulus gear, the sprag pivoting a fulcrum shaft which is fixed to the transmission housing.