5results about How to "Achieve length adjustment" patented technology

The utility model discloses a foundation pit protection frame, the utility model relates to foundation pit protection technical field, including the protection board, the protection board and the lateral wall of foundation pit are pasted together, lower support spare, lower support spare sets up between the bottom of foundation pit and the lower extreme outside of protection board, upper support spare, upper support spare sets up between the upper extreme outside of two protection boards, connecting piece, connecting piece sets up in the one end of upper support spare away from one of protection boards, adjusting part, adjusting part installs one end of upper support spare. The foundation pit protection frame, and the upper support spare is connected two protection boards through adjustable mechanism, and the movable rod is cooperated with the limiting hole of different position through the limiting screw, realizes the length regulation, and adjusting part is cooperated through the knob, the screw rod and the dovetail slide block, can be adjusted the connecting piece flexibly, makes the close -fitting piece can close another protection board closely, can according to the actual size and shape of foundation pit, the structure of protection frame is adjusted conveniently.

This utility model relates to the field of mining equipment technology, and in particular to a universal rigid connection device for a narrow-gauge mining transport vehicle. It includes: two symmetrically arranged connecting components and a length adjustment component disposed between the two connecting components. Each connecting component includes a connecting sleeve for connecting to the transport vehicle, a connecting cylinder connected to the connecting sleeve, a universal ring located within the connecting cylinder, a ball head located within the universal ring, and a connecting rod connected to the ball head. The length adjustment component is used to adjust the distance between the two connecting rods. By simultaneously fitting the sleeve onto the free ends of both connecting rods, aligning the first and second through holes according to the working conditions, and then tightening with bolts, the overall length of the universal rigid connection device can be adjusted without disassembling the device, while both ends of the device are still connected to the narrow-gauge mining transport vehicle, thus saving time on disassembly and reinstallation.