Non-contact limiting buffer device

The utility model provides a non-contact limiting and buffering device. The non-contact limiting and buffering device comprises a nut assembly (1), a lead screw (2) and a buffering and limiting assembly (3). Wherein the nut assembly (1) is in spiral transmission on the lead screw (2), and the buffer limiting assembly (3) is arranged at the end part of the lead screw (2); wherein the nut assembly (1) comprises a nut permanent magnet (1-1) and a nut (1-3); the buffer limiting assembly (3) comprises a limiting shell (3-1), a limiting block (3-2) and a limiting permanent magnet (3-4). The limitingshell (3-1), the limiting block (3-2) and the limiting permanent magnet (3-4) are sequentially arranged in a sleeved mode from outside to inside. The end, facing the buffer limiting assembly (3), ofa nut (1-3) in the nut assembly (1) is provided with the nut permanent magnet (1-1). Due to the fact that limiting is conducted according to the principle that the same magnetic poles repel each other, vibration and noise caus