The invention discloses an electric linear driver having shock-absorption protection and a controllable
stroke. The electric linear driver comprises a motor, a slide sleeve
pipe, a pull
rope displacement sensor, a
motor controller electrically, and a connecting plate connected with a pull
rope of the pull
rope displacement sensor; and a rubber buffer pad is disposed between the slide sleeve
pipe and an end face of a thread
bushing. According to the electric linear driver having the shock-absorption protection and the controllable
stroke, a telescopic displacement of the slide sleeve
pipe of an electric cylinder is detected through the disposed pull rope displacement sensor, so the
stroke of the electric cylinder is accurate and controllable, and then the electric cylinder can be conveniently used to drive an object the displacement quantity of which needs to be accurately controlled; and the rubber buffer pad is disposed between the slide sleeve pipe and the end face of a thread
bushing, so, in motor starting, stop, reversing and other working processes, the rubber buffer pad can buffer an axial
impact force on a
screw thread pair of a screw mechanism, damage of the axial
impact force on the
screw thread pair can be prevented then, and the
failure rate of the electric cylinder is reduced.