4results about How to "Guaranteed synchronous motion" patented technology

The utility model relates to a novel elevator with double counterweight housings, which comprises an elevator car and a counterweight mechanism, the elevator car is connected with the counterweight mechanism through a steel wire rope and a double-wheel tractor, the counterweight mechanism comprises two counterweight units, the two counterweight units are connected through a pair of fixing plates, and the two counterweight units are connected through a pair of fixing plates. The steel wire rope is connected to the surface of the uppermost fixing plate. The double counterweight units are arranged in parallel, so that the occupied width of the counterweight units is reduced, the width of the lift car is increased, the split type balancing weights and the stand columns are installed in a combined mode through the notches, fast increase and decrease of balance weights are supported, and different load-carrying requirements are met. A vertical guide system formed by the guide rods and the sleeves restrains the counterweight housing from shaking, and synchronous movement of the double counterweight units is guaranteed. The threaded rod lifting mechanism supports overall height adjustment of the counterweight housing, and the counterweight block is convenient to overhaul or replace. And the limiting rod and the end cover are double-locked, so that the clump weight is prevented from falling off due to vibration, and the operation safety is improved.

The utility model discloses a film supporting and releasing mechanism for a packaging machine, and relates to the technical field of film packaging machines. According to the utility model, one of the pair of film supporting rollers is configured to be a structure capable of translating relative to the other film supporting roller, and after the film roll on the film supporting roller is unwound, the movable film supporting roller is far away from the other film supporting roller, so that the distance between the pair of film supporting rollers is increased, and the roll core of the film roll after the film is unwound can fall off from the space between the film supporting rollers; the roll core is automatically removed, the roll core does not need to be manually removed, then the convenience of film roll replacement is improved, the efficiency of film roll replacement is improved, and a foundation is provided for automatic film replacement. And meanwhile, the function of adaptively adjusting the distance between the film supporting rollers along with the change of the roll diameter of the film roll can be achieved.

The invention relates to the technical field of cold traps, in particular to an efficient diffusion pump cold trap which comprises a cold trap shell, and the cold trap shell comprises a cold trap shell body and a cold trap cover body. The condensation assembly comprises a cylindrical main condensation cavity, a plurality of sub condensation cavities and a coiled pipe type condensation pipe; a main condensation cavity is formed in the main condensation cavity; one end of each sub-condensation cavity extends into the main condensation cavity in the radial direction of the main condensation cavity to form a condensation connecting part, and the other end of each sub-condensation cavity extends outwards in the radial direction of the main condensation cavity to form a condensation diffusion part; an edge condensation sub-cavity is formed in the condensation sub-cavity; the plurality of sub condensation cavities are respectively communicated with the main condensation cavity; the coiled pipe type condensation pipe is in contact with the inner wall of the main condensation cavity; and the coil pipe type condensation pipe is also respectively contacted with the condensation connecting parts of the plurality of sub condensation cavities. Oil vapor and other gas molecules generated by the diffusion pump can be efficiently condensed, and the trapping, adsorption and condensation efficiency of the oil vapor is remarkably improved.

The utility model relates to a self -adjusting drainage grab bucket, including two opposite setting bucket body, through the support pull rod with the upper crosspiece of bucket body articulation, be located in the upper crosspiece lower extreme and with two bucket body articulation lower crosspiece, be equipped with upper pulley set on the upper crosspiece, be equipped with lower pulley set on the lower crosspiece, the lower pulley set includes the lower pin shaft setting on the lower crosspiece, the sequential arrangement of several lower pulley pieces along the lower pin shaft axial, the lower pulley piece is opened and is equipped with the perforation for the lower pin shaft to pass through on, the diameter of perforation is greater than the diameter of lower pin shaft. The utility model discloses when using, make the clearance between lower pulley piece and lower pin shaft, when the opening and closing steel wire rope in the lifting process bucket body closes and picks up the material and appears skew, can pass through the slight slippage of lower pulley piece, alleviate the inclination angle, avoid because the inclination angle is bigger, lead to the steel wire rope appears the groove and the breakage of the occurrence, make lower pulley piece not use bearing simultaneously, avoid the damage because bearing rust.