6results about How to "Small preload" patented technology

This utility model relates to the field of building auxiliary materials, and in particular to an anchor bolt for fixing the thermal insulation layer of existing building exterior walls. It includes an anchor plate, an anchor bolt sleeve, a mixing body, an auxiliary nail core, and a sleeve head. The anchor bolt sleeve is provided with multiple barbs. The sleeve head includes a solvent chamber and a spraying part coaxially connected. The solvent chamber contains two cavities separated by multiple PVE elastic films, each containing an epoxy resin base and an epoxy resin curing agent. The auxiliary nail core drives the mixing body to rotate, ensuring thorough mixing of the epoxy resin base and curing agent. The mixed epoxy resin flows out through the spraying part, filling the gap between the anchor bolt and the wall. After the epoxy resin cures, the anchor bolt and the wall become integrated, achieving the effect of fixing the thermal insulation board.

The utility model relates to chain drive roller, and disclose a kind of chain drive roller barrel group axial locking device, including mounting bracket, the mounting bracket is fixedly connected with output mechanism, the mounting bracket is fixedly connected with second sprocket The second sprocket is provided with self-locking nut assembly, fixedly connected with axial locking mechanism, the axial locking mechanism is engaged with shaft sleeve, the axial locking mechanism includes second motor, first gear, sleeve rod, inner rod, mounting bracket, telescopic component, second gear, sliding slot, sliding rod, rack, wherein the second motor is fixed on one of bottom plate, the output end of the second motor is fixedly connected with first gear, the first gear penetrates bottom plate, and is rotatably connected with bottom plate, the first gear is fixedly connected with sleeve rod, the sleeve rod is connected with inner rod, the other end of the inner rod away from sleeve rod is fixedly connected with another first gear: make axial locking device flexibility better, can adapt to different diameter and different length shaft sleeve.

The invention provides a fixed clearance return stroke type high-speed axial plunger pump, and relates to the field of axial plunger pumps, the fixed clearance return stroke type high-speed axial plunger pump comprises a shell and a main shaft capable of rotating in the shell, the main shaft drives a cylinder body and an impeller to rotate, an axial channel is arranged in the cylinder body, a pre-tightening spring is arranged in the axial channel and provides pre-tightening force for a return stroke disc, and a plunger body can reciprocate in the axial direction. The end part of the plunger body is matched with the sliding shoe to slide on the swash plate, and a return stroke assembly is further arranged and comprises a return stroke plate, a fixed gap pressing plate and a fixing device; the return plate is limited between the fixed-gap pressing plate and the sliding shoe and arranged with the fixed-gap pressing plate in a spaced mode, and the fixing device is used for fixing the fixed-gap pressing plate to the swash plate. The return stroke assembly with the fixed gap is adopted, the problem that the sliding shoe excessively inclines and even disengages in the return stroke process is avoided, meanwhile, the return stroke disc utilizes the pre-tightening force of the center spring, and it is ensured that the sliding shoe is flexibly attached to and sealed with the swash plate under the low-speed working condition; the fixed gap pressing plate balances the centrifugal overturning moment of the sliding shoe through physical limiting under the high-speed working condition.

The utility model discloses an ultrasonic tissue cutting knife, including blade holder, blade body and ultrasonic wave amplitude lever, ultrasonic wave amplitude lever sets up at ultrasonic tissue cutting knife one end and the end face is equipped with the round mounting hole of blade holder installation, the one end of blade holder is equipped with the square mounting hole of blade body installation, the surface symmetrical mounting of ultrasonic wave amplitude lever has fixed sleeve, the inside fixed sleeve installs locking screw, and one end of locking screw penetrates blade holder and extends to the inside of blade body and is inserted with it. The ultrasonic tissue cutting knife, the structure design is reasonable, convenient to use, through the mode of bolt screwing and fixing and cooperation shielding limit, can greatly guarantee the installation of blade holder and the installation firmness of blade itself, makes it have better use effect in the operation process, can effectively reduce the pretightening force of fastening bolt simultaneously, can improve the service life of threaded cooperation under the condition of often disassembling blade.

The utility model relates to a plunger cylinder technical field, especially a compact plunger cylinder of back and forth action, including cylinder body, plunger rod and guide sleeve, the head end of cylinder body is covered in guide sleeve, plunger rod is located in the cylinder body, and plunger rod stretches out from the guide hole of guide sleeve, its characterized by: still including piston rod, the tail end of plunger rod in cylinder body has piston hole, and the piston end of piston rod inserts piston hole, and the inner chamber of piston hole is divided into rod cavity and rodless cavity by the piston of piston end, and the opening of piston hole is covered with cylinder cover, and one piston oil cylinder is formed on plunger rod, and the rod end of piston rod is connected with the bottom end of cylinder body. The utility model has the beneficial effects that: through inlaying piston oil cylinder in plunger cylinder, the self-limiting and back and forth action of plunger cylinder are realized while not increasing the volume of plunger rod, and moreover, plunger cylinder and piston oil cylinder can work simultaneously, and plunger cylinder will not cause the decrease of thrust because of inner chamber piston oil cylinder.

The utility model relates to stress cable technology field, concretely is a kind of adjustable prestressed cable device, including mounting bracket, connecting frame, adjusting screw rod and anti-loosening mechanism;One end of mounting bracket is connected with connecting lug;Connecting frame is set in the end of mounting bracket and is used to fix the end of cable, and connecting frame penetrates mounting bracket and is slidably connected with mounting bracket;Adjusting screw rod is set in mounting bracket, and one end of adjusting screw rod is rotatably connected with mounting bracket, and the other end of adjusting screw rod is threadedly connected with threaded sleeve, and the end, away from adjusting screw rod, of threaded sleeve is fixedly connected with connecting frame;Anti-loosening mechanism is set on mounting bracket, and one end of anti-loosening mechanism is connected with mounting bracket.The utility model is provided with anti-loosening mechanism, check pawl is attached to spring elastic force under the action of check ratchet wheel and attaches to the check tooth of check ratchet wheel, and adjusting screw rod is positioned, to prevent loosening between adjusting screw rod and threaded sleeve, and then avoid the prestress of cable to be small.