An electric parking lock apparatus includes a parking mechanism, an electric actuator, an engagement member, a first urging member, and a first electromagnetic solenoid. The parking mechanism includes a parking gear and a parking pawl. The engagement member includes first and second engagement elements. The first engagement element includes a proximal end coupled to the first urging member. The second engagement element includes a proximal end coupled to a brake pedal of the vehicle. In a state of power supply failure, the first electromagnetic solenoid allows the first engagement element to swing in the direction for engaging with the second engagement element. In the state of power supply failure, the engagement elements engage with each other when the brake pedal is released from a depressed state, and the parking pawl is caused to swing in a direction for engaging with the parking gear as the brake pedal is released.

The invention relates to parking brake device (10) for a vehicle transmission (GT) comprising a driveshaft (AW) and a first actuator (F1), via which the driveshaft (AW) can be rotated; a pawl (2), which can be lockingly engaged in the vehicle transmission (GT); a rotary mechanism (1), which is connected to the driveshaft (AW) and comprises an engaging mechanism, an insert spring (16) and a permanent magnet (PM), wherein the pawl (2) and the rotary mechanism (1) can be moved with the permanent magnet (PM) between a locking position (P) and a neutral position (nP) for the vehicle transmission (GT), wherein the rotary mechanism (1) can be pretensioned via the insert spring (16) and the neutral position (nP) can be adopted; wherein the parking brake device (10) also comprises: a second actuator (F2), via which the engaging mechanism can be triggered when the insert spring (16) is pretensioned and,

In an actuator a shaft and a motor are coupled together by a coupling mechanism. The coupling of the shaft to the motor by the coupling mechanism is released by rotational operation force on the shaft, and a parking position of a transmission is released by the shaft being rotated. There is accordingly no need for a device to release the coupling between the shaft and the motor by the coupling mechanism, enabling a simple configuration for the actuator.

A control device (10) for a parking brake device has an electronic device (12) by means of which, in the event of failure of a power supply system of a vehicle equipped with the control device (10) and the parking brake device during a procedure for parking the vehicle, at least one activation signal (14) can be output to a triggering device (16) of the parking brake device, so that the triggering device (16) can be activated by means of the at least one activation signal (14) and the parking brake device can be transferred to a locking mode by means of the activated triggering device (16), such that the vehicle is locked in its current parking position by means of the parking brake device present in its locking mode.

A mechanical unlocking mechanism for electronic parking is provided, which comprises a parking cam assembly, a pawl assembly, a pull rod assembly and a parking gear; the parking cam assembly comprises a parking guide shaft and a parking cam, the parking cam is sleeved on the parking guide shaft, at least a first convex part and a second convex part are provided at two sides of the parking cam, and a connecting part is provided on the second convex part; the pull rod assembly is connected with the parking cam via the connecting part, and the pull rod assembly pulls the second convex part to drive the parking cam to rotate; the parking gear can be fixed or rotatable according to the pawl assembly being in a first position where the parking gear parks in or a second position where the parking gear parks out as the parking cam rotates. The mechanical unlocking mechanism according to the present disclosure provides an emergent mechanical unlocking function when the parking motor is powered off, and the driver can perform manual mechanical unlocking in the cab without getting off the vehicle, so it has high safety and good operation comfort.

A park lock unit and method for operation of said unit are provided. In one example, the park lock unit includes a sliding assembly that engages and disengages a parking pawl from a toothed wheel and an electronic actuation assembly configured to engage the parking pawl with the toothed wheel when electric power provided to the electronic actuation assembly drops below a threshold value. The park lock unit further includes a manual release mechanism configured to disengage the parking pawl from the toothed wheel in response to operator input.

A locking unit with a hydraulically actuable piston, an electromagnet with a coil and an armature, at least one latching element, a coupling rod, and a magnetic element. The coupling rod connects the magnetic element to the armature or an armature rod which is attached thereto, and a prestressing element fixes the magnetic element in a guide tube radially. As a result, an advantageous position determination is made possible by way of sensing of a magnetic field which is generated by the magnetic element.

In a release mechanism of a brake device used in a power transmission process, a motor supplies power, an output shaft of the motor is connected to the brake device, the brake device is formed by at least one friction disc and a brake disc, and a lining is installed on a side of the brake disc facing the friction disc, and a side is acted by an elastic member and attached with the friction disc to produce a braking effect. The release mechanism is connected to the brake device and capable of eliminating the braking effect of the brake device when needed, so that a machine can be operated to complete a stroke to improve the safety of use.

A method for operating an automatic transmission apparatus having a parking lock device. The parking lock device has a hydraulic apparatus with a hydraulic cylinder and a hydraulic piston arranged therein, which can be placed in at least two positions by a lock apparatus and an emergency unlock apparatus. The hydraulic piston is operatively connected to a shifting shaft of the parking lock device, and a pressure can be adjusted in the hydraulic cylinder by a hydraulic valve. The shifting shaft can be shifted within an operating position range by the hydraulic apparatus. In doing so, upon activation of the emergency unlock apparatus, the shifting shaft is shifted into a position that is outside of the operating position range, and an operating state of the emergency unlock apparatus is checked.

A park release system includes a park release handle assembly. The handle assembly comprises a base, a handle pivotally connected to the base, and a lock piece. The handle is pivotable between an open position and a closed position. The lock piece is uniquely designed to selectively lock the handle in open position and to release the handle and allow it to pass back to closed position after the handle is pulled from lock position.

The park release system may include a cable connector assembly. The cable connector assembly may comprise a first cable section connectable to a second cable section. The second cable section includes a housing having a slider within a passageway and below a flexible retention beam. The slider is configured to receive and connect to the cable from the first cable section.