Jacking device

A jacking device, comprising:

• a combination of a slave arm and a link arm, wherein the slave arm and the link arm are operatively connected with a machine body, said machine body comprising a system module and a moving module displaceable relative to said system module, and
• a support arm disposed between the moving module and the system module, said support arm comprising a first end rotatably pivoted on the moving module and a second end rotatably pivoted on the system module,
• wherein the slave arm comprises a first end and a second end, said second end of the slave arm being pivoted to the link arm,
• wherein the link arm comprises a fixation end spaced from the moving module and a free end operatively coupled to said moving module, and
• wherein the second end of said support arm is operatively coupled to said first end of said slave arm to apply an external force thereto in a direction towards said fixation end of said link arm, wherein upon application of said external force, said first end of said slave arm is displaced by said external force towards said fixation end of said link arm, causing said second end of the slave arm to move the link arm, resulting in said moving module displacement by the free end of the link arm motioned between a first position and a second position.