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The invention relates to an active protection device for crane jib facture falling. The active protection device comprises a jib, a sliding groove is formed in the jib, a steel wire rope is arranged in the sliding groove, the right end of the steel wire rope is connected with the jib, multiple sliding blocks capable of sliding left and right are installed on the steel wire rope, a rack is arrangedon each sliding block, gears meshed with the racks are arranged on the jib, each gear is provided with a screw which is coaxially and slidably connected with the gear, the screws are connected with the jib through threads, torsional springs are installed on the jib, and the two ends of each torsional spring are connected with the jib and the corresponding gear respectively; multiple support frames arranged on the lower portion of the jib are arranged on the jib, the support frames correspond to the sliding blocks one to one, the left end of each support frame is hinged to the jib through a rotation shaft, and a straight groove is formed in the left end of each support frame; clamping blocks capable of vertically sliding are arranged on the jib, the lower end face of each clamping block makes contact with the upper end face of the corresponding support frame, springs arranged on the clamping blocks are arranged on the jib, and the two ends of each spring make contact with the jib and the corresponding clamping block respectively; each support frame is provided with a safety rope, and one end of each safety rope penetrates into the jib in a vertically upward mode and is extruded onthe jib through the back end of the corresponding screw.

The invention provides an automatic telescopic fishing rod. The automatic telescopic fishing rod comprises a fishing rod, a fishing line, a ground-inserting rack, an elastic part, a clamping rod, a bouncing part, an initiating connecting arm and a rotary rod. The ground-inserting rack is rotatably connected to one end of the fishing rod which is provided with a chute. Two opposite ends of the elastic part are connected to the fishing rod and the ground-inserting rack. One end of the clamping rod is rotatably installed in the ground-inserting rack and the other end thereof is arranged in the sliding chute. The bouncing part and the initiating connecting arm are rotatably installed on the fishing rod. Two opposite ends of the bouncing part are provided with a snap joint part and a guide part. The initiating connecting arm is provided with a guide column and a pushing part. The guide column is installed in the guide hole and capable of moving between the first position and the second position along the guide hole. The rotary rod is rotatably connected to the fishing rod. One end, towards the chute, of the rotary rod is provided with a line-returning boosting part and a routing boosting hook. The fishing line winds around the rotary rod to lift the rotary rod away from one end of the chute. The automatic telescopic fishing rod can be automatically lifted when the fishing line routes and returns.

The invention relates to an active suspension arm breakage prevention device which comprises a suspension arm. Multiple sliding grooves are formed in the upper end face of the suspension arm, sliding blocks are arranged in the sliding grooves, and the right ends of the sliding blocks are connected with the suspension arm through first tension springs. Two clamping blocks parallel in a front and back mode and capable of sliding in a front-back mode are arranged on each sliding block, and the two clamping blocks are respectively connected with the corresponding sliding block through second tension springs on the outer sides of the clamping blocks. Two L-shaped grooves are formed in the groove bottom of each sliding groove, and the lower portions of the two clamping blocks are arranged in the two L-shaped grooves. Two clamping arms parallel in a front-back mode are arranged on the suspension arm, the right ends of the clamping arms are hinged to the suspension arm, the two clamping arms are arranged between the two clamping blocks, and the lower ends of the two clamping blocks penetrate through the L-shaped grooves and are respectively in contact with the two clamping arms. Multiple supporting frames are arranged on the suspension arm, the left ends of the supporting frames are hinged to the suspension arm, and straight grooves are formed in the left ends of the supporting frames. A clamping block capable of vertically sliding is arranged on the suspension arm, and the upper end of the clamping block is connected with the suspension arm through a spring. Safety ropes are arranged on the supporting frames, and one end of each safety rope is clamped between the two corresponding clamping arms. A steel wire rope is clamped between the two clamping blocks.

The invention relates to a crane jib breakage and falling safety protection device, which comprises a jib. The jib has a chute, inside which a wire rope is arranged. The right end of the wire rope is connected to the jib. Multiple slide blocks which can slide in the chute are arranged on the wire rope. Each slide block is equipped with a gear rack; a gear which is engaged with the gear rack is arranged on the jib; a screw which can coaxially slide with the gear is arranged on the gear; and the screw is in threaded connection with the jib. Torsion springs are arranged on the jib. Two ends of each torsion spring are respectively connected to the jib and the corresponding gear. The jib has multiple support frames which are arranged below the jib. The left end of each support frame is hinged to the jib through a rotating shaft. Multiple demising grooves are arranged at the lower end face of the jib. Front and rear end faces of each demising groove are respectively provided with a vertical chute. Two ends of the rotating shaft are respectively placed inside the vertical chute. The bottom of the demising groove is provided with a counter bore, inside which an extension spring is arranged. The upper end of the extension spring is fixed inside the counter bore, and the lower end of the extension spring is connected to the rotating shaft. There is a safety rope on the support frame, and one end of the safety rope vertically passes through the jib and is extruded on the jib through the rear end of the screw.

The invention discloses an automatic material sorting device. The device comprises a base, and a first trough is formed in the outer surface of the upper end of the base; a second trough is arranged at the left end of the first trough; a third trough is arranged at the left end of the second trough; a fourth trough is arranged at the left end of the third trough; a conveying belt is arranged at the upper ends of the first trough, the second trough, the third trough and the fourth trough; and a fourth air cylinder is arranged at the rear end of the conveying belt, a third air cylinder is arranged at the right end of the fourth air cylinder, a second air cylinder is arranged at the right end of the third air cylinder, a first air cylinder is arranged at the right end of the second air cylinder, an ejection opening is formed in the right end of the first air cylinder, and a long-strip-shaped baffle is arranged on the inner surface of the lower end of the ejection opening. According to theautomatic material sorting device, a material detection device facilitating feeding is arranged, convenience is brought to use, workpieces of different materials and different colors are sorted, andit is avoided that the material taking is complex and time-wasted.