Manual fast-installing nut device with pre-tightening function

The invention discloses a manual fast-installing nut device with a pre-tightening function. The manual fast-installing nut device comprises a lock shaft, a lock nut, an elastic sliding block, a spring and a limiting steel wire pin. The lock shaft is a threaded rod structure, and one end of the threaded rod structure is provided with a flat head. The interior of the lock nut is of a special-shaped cavity structure. The spring is placed into the elastic sliding block and then integrally pressed into the special-shaped cavity of the lock nut. A step structure is arranged outside an end cover of the lock nut. The center of the end cover of the lock nut is a flat through hole structure. The flat head of the lock shaft penetrates through the flat through hole structure so that the flat head can be clamped or disengaged. A circular ring structure is arranged in the center of the interior of the end cover of the lock nut. The inner side of the circular ring structure is used for limiting the lock shaft. The outer side of the circular ring structure is used for storing and limiting the spring. The lower end of the interior of the lock nut is of a hollow columnar structure. According to the manual fast-installing nut device with the pre-tightening function, manual operation can be achieved, locking or unlocking can be achieved by rotating the manual nut fast-installing device by 90 degrees, a three-dimensional bearing function is achieved, the pre-tightening function and an automatic anti-looseness function are achieved after locking, and the manual fast-installing nut device can adapt to strong vibration of aerospace products and the shock environment.