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Experimental verification demonstrates a new bolt installation tool enhances efficiency in compact assembly environments.
In this study, a bolt installation tool loading mechanism has been developed to overcome the constraints posed by compact space in the assembly of aero-engines and airframes. The loading mechanism features a thin-walled structure, allowing it to adapt to compact working space, and achieves high torque output through the coordinated drive of the ratchet–pawl mechanism and the hydraulic cylinder. A detailed design was carried out for the thin-walled structure, force arm dimensions, and ratchet tooth profile in the loading mechanism. Through dynamic simulation analysis, the strength safety of key components under a torque of 120 N m and the rationality of symmetrical design were verified. Experimental results demonstrated that the tool can deliver an average torque of 136.3 N m within a space as narrow as 4 mm, fulfilling the design requirements. The findings of this paper provide a reliable solution for the assembly of high-strength bolts in the compact space of a lean engine, significantly enhancing assembly efficiency and safety.
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Wensheng et al. (2026) studied this question.
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