142results about How to "Smooth lifting movement" patented technology

The invention provides a no-rocker roller vertical-lifting-type comprehensive coal cutter. The no-rocker roller vertical-lifting-type comprehensive coal cutter is suitable for mining of a hard medium thick long wall coal seam with coal seam dip less than 30 degrees and medium thick coal quality and comprises a central control box, a left cutting lifting reduction gearbox, a right cutting lifting reduction gearbox, a left side guiding rail fixed box, a right side guiding rail fixed box, a left traction reduction gearbox, a right traction reduction gearbox, a left walking gear box and a right walking gear box. The left cutting lifting reduction gearbox and the right cutting lifting reduction gearbox are provided with sideways which are matched with lifting guiding rails of the left side guiding rail fixed box and the right side guiding rail fixed box. The left cutting lifting reduction gearbox and the right cutting lifting reduction gearbox are driven to do lifting movement by using lifting oil cylinders, and meanwhile, cutting motors of the left cutting lifting reduction gearbox and the right cutting lifting reduction gearbox drive a spiral roller to rotate through a cutting gear reduction mechanism. The left traction reduction gearbox and the right traction reduction gearbox drive the left walking gear box and the right walking gear box, and then left and right traction movement of the whole machine is driven. According to the no-rocker roller vertical-lifting-type comprehensive coal cutter, a cutting gear reduction mechanism adopts two-level gear transmission and two-level planetary gear transmission, a plurality of sets of idle wheel sets do not existed, and a transmission chain is simple; and by using matching of the lifting guiding rails and the sideways, the whole machine is compact in structure, and the reliability and stability of operation are improved.

To make a scraping off function for a surplus lubricant to be certainly and excellently exerted, to enable the long and stable maintenance of a prescribed oil leakage prevention capacity by avoiding the mixing of dust in the surplus lubricant and to enable the reuse of the surplus lubricant for the maintenance of the lubrication capacity for a vertical motion of an upper looper table. Two upper penetrating slot holes perpendicularly intersecting a penetration hole for the upper loop table to slidingly go up and down are bored in a cylindrical upper looper guiding body which is engaged and supported in a circular hole bored in an upper looper guiding member fixed to a sewing machine frame to be rotatable around the center of the circle, and an oil seal ring with an elastic lip which elastically touches by sliding a peripheral surface of the upper looper table and scrapes off the surplus portion of the lubricant attached to the peripheral surface and an oil absorbent ring which can absorb and keep the scraped surplus lubricant are respectively engaged with the upper penetration long hole and the lower penetration slot hole.

The invention provides a lifting device of a gas stove and the gas stove. The lifting device of the gas stove comprises a bearing structure and a drive device. The bearing structure is arranged in a shell of the gas stove and can bear at least two burners of the gas stove. The drive device drives the bearing structure to do lifting movement in the shell. As the bearing structure can bear the at least two burners, during use, the two or more burners can be put on the bearing structure, then the drive device drives the bearing structure to do lifting movement, the purpose that the two or more burners put on the bearing structure are driven to simultaneously do lifting movement through one drive device can be achieved, use of the drive device can be reduced, and the cost is reduced; and meanwhile synchronous movement of the two or more burners can also be achieved, and the lifting efficiency is improved.