Patent ID: 11958149
Assignee: AECC SHANGHAI COMMERCIAL AIRCRAFT ENGINE MANUFACTURING CO., LTD.
Field: Machine tools (Mechanical engineering)
Classification: CPC B  F | IPC B

Claim 0:
1. A fastening tool characterized in comprising:
a base part, provided with a top part guiding portion, a pressing part guiding portion and a transmission part guiding slot;
a top part, at least part of which is placed in the base part and provided with a top part guiding matching portion, wherein the top part guiding matching portion engages the top part guiding portion in a sliding fit;
a pressing part, provided with an inclined transmission surface and a pressing part guiding matching portion, wherein the pressing part guiding matching portion engages the pressing part guiding portion in a sliding fit to guide the sliding of the pressing part;
a lever, provided with a first end, a second end and a hinging portion between the first end and the second end, wherein the hinging portion is hinged to the base part;
a transmission part, engaging the transmission part guiding slot in a sliding fit;
wherein the transmission part is driven to slide by the inclined transmission surface of the pressing part when the pressing part is driven to slide towards a fastening direction, the lever is driven to rotate as a force is applied by the transmission part to the second end of the lever, then the top part is driven to slide outwards the base part as a force is applied by the first end of the lever to the top part, so as to push a workpiece upwards; due to a reaction force acting on the inclined transmission surface by the transmission part and a friction between the pressing part guiding matching portion and the pressing part guiding portion, the pressing part remains to be self-locked by friction, which can constrain the sliding fit between the pressing part guiding matching portion and the pressing part guiding portion, and the slided top part is locked.