Electric steering lock device of vehicle and assembly method thereof

An electric steering lock device in a vehicle comprising:

• a lock body having a lock hole formed opened downward;
• a cover unit coupled to an upper side of the lock body to form an inside space with the lock body;
• and
• a drive unit assembly arranged in the inside space to include a partition unit arranged to partition the inside space into an upper side and a lower side to have a plurality of mounting places,
• wherein the drive unit assembly generates power in the inside space located above the upper side of the partition unit and forwards the power to the inside space located under the lower side of the partition unit for moving a lock bar in a vertical direction through the lock hole, and
• wherein the drive unit assembly includes:
• a drive motor arranged on the upper side with a rotation shaft arranged horizontally,
• a worm gear coupled to a fore end of the drive motor to rotate centered on the rotation shaft of the drive motor,
• a worm wheel gear arranged on the upper side engaged with the worm gear to rotate centered on a vertical shaft,
• a spur gear arranged on the upper side engaged with the worm wheel gear to rotate centered on a vertical shaft and having a female thread portion opened downward formed therein,
• a lock stopper unit arranged on the lower side engaged with the female thread portion in the spur gear to move up/down, and
• the lock bar coupled to an underside of the lock stopper unit for locking or unlocking a steering column as the lock bar is exposed to an outside of the electric steering lock device in the vehicle as the lock bar moves up/down along the lock hole according to the up/down movement of the lock stopper unit.