Manual jacking device

The utility model discloses a manual jacking device, which resolves the problem that the existing hydraulic jacking devices need power support and cannot be used for rescuing timely. The manual jacking device is characterized in that the manual jacking device comprises a force-arm jacking mechanism, a bevel gear transmission mechanism and a direction-variable ratchet wheel mechanism (8). The force-arm jacking mechanism composed of a triangular arm of force (1), a connecting rod (3), a connecting rod supporting seat (4) and a jacking rod (15), and the bevel gear transmission mechanism comprises a conical gear (13), a gear (12) and a screw rod (14) arranged inside a cylinder sleeve (6), and a push ball bearing (11) arranged on a base (10). The transmission mechanism can rotate by manually rotating a ratchet wheel (19) to push the jacking rod (15) to extend forwards so as to support the triangular arm of force (1), and object jacking can be realized. The manual jacking device can be used for rapidly and effectiv