Parking actuator and vehicle having same

Abstract

The invention provides a parking actuator and a vehicle with the same. The parking actuator comprises a cylinder body, a drive device and a second external member, wherein the cylinder body is provided with a piston; the drive device comprises a rod and a first external member arranged on the rod in a sleeving mode; the first external member and the rod are in threaded fit; the first external member fits with the piston and used for driving the piston to move relative to the cylinder body; the second external member is arranged on the rod in a sleeving mode and is in threaded fit with the rod;the second external member can be released or braked; when the parking actuator performs the parking action, a screw rod drives the piston to move in the parking direction extending out of the cylinder body through the first external member, and the second external member can be braked in time so as to drive the rod to move in the axial direction of the parking direction due to threaded fit withthe screw rod. Therefore, the operation efficiency of the parking actuator is improved by braking or releasing the second external member in time, the clamping action or releasing action is performedquickly, and therefore the safety and reliability of the parking actuator are improved.

Description

technical field [0001] The invention relates to the technical field of vehicles, in particular to a parking actuator and a vehicle with the same. Background technique [0002] In the related art, when the parking actuator of the vehicle is parked, the screw and the screw sleeve form a screw transmission mechanism, and the screw drives the screw sleeve to push the piston to move, so that the piston drives the friction plate to clamp the brake disc to realize the parking function. However, when the motor drives the screw to reverse and the screw retracts the screw sleeve, the piston no longer provides clamping force and the parking is released; in order to reduce the residual drag torque, the screw will still retreat for a period of idle travel after the parking is released. This will result in an increase in the next parking clamp stroke. Due to the existence of idle travel, the parking clamping and release time is prolonged, which affects the user experience and the braking...

AI Technical Summary

Problems solved by technology

However, when the motor drives the screw to reverse and the screw retracts the screw sleeve, the piston no longer provides clamping force and the parking is released; in order to reduce the residual drag torque, the screw will still retreat for a period of idle travel after the parking is released. Will result in increased next park clamp travel

Due to the existence of idle travel, the parking clamping and release time is prolonged, which affects the user experience and the braking response speed during emergency braking

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