8 results about "Lift thread" patented technology

The utility model discloses a double-motor sub-control type electric shutter driving mechanism, which belongs to the technical field of electric shutters and comprises a turnover motor, a lifting motor, a turnover shaft, a lifting shaft, a double-shaft seat and a mechanical-electrical interlocking limiting device, the turnover shaft and the lifting shaft are arranged in parallel, and the double-shaft seat is fixed in a top frame of a shutter body through an L-shaped mounting seat. The turning wheel and the lifting winding reel are in key connection respectively, so that an independent transmission path of the lifting rope and the turning rope is realized; the limiting device comprises a rectangular frame, an overturning / lifting threaded shaft barrel penetrating through the rectangular frame, a control block in threaded sleeving connection and a guide groove type limiting switch set, and a corresponding limiting switch is triggered through sliding of an overturning protruding block and a lifting protruding block along a guide groove, so that a motor driving signal is directly cut off. Through the double-motor time-sharing control logic and the thread pair linkage limiting design, rope abrasion and unexpected displacement caused by action coupling are thoroughly eliminated, the positioning precision reaches + / -0.05 mm, meanwhile, the standby energy consumption is reduced by 62%, and the device is suitable for high-rise buildings and intelligent home scenes.

The invention discloses a process control method for improving a deformed steel bar negative tolerance technology, and belongs to the technical field of bar rolling, and the control method comprises the steps of small-specification slitting rolled finished product size optimization, small-specification slitting line difference fluctuation optimization, small-specification double-length head and tail size fluctuation optimization and large-specification deformed steel bar negative tolerance and inner diameter optimization. The method aims at the technical bottlenecks that in existing deformed steel bar negative tolerance rolling, the inner diameter of a small-specification slitting rolled finished product is prone to exceeding the standard, the slitting line difference fluctuation is large, the double-length head and tail size difference is obvious, the large-specification negative tolerance is small, and the inner diameter is prone to exceeding the standard. According to the method, negative tolerance improvement is achieved through multi-dimensional collaborative optimization, the base circle size of a small-specification finished hole pattern is optimized, the rolling mill assembly precision is controlled, a pre-segmentation hole pattern is iteratively adjusted, a precise guide and guard beam is applied, electrical parameters are optimized, a rolling control system is upgraded, and large-specification finished hole pattern parameters are iterated for multiple rounds; and after application, the market competitiveness and management and delivery benefits of products are remarkably improved.

The invention discloses a power distribution capacity increasing device for power distribution engineering, which comprises a capacity increasing box body, the bottom of the capacity increasing box body is rotatably connected with a twisting rod, the upper part of the twisting rod is fixedly connected with a box fixing gear, the box fixing gear is in meshed connection with a plate fixing rack, the side part of the plate fixing rack is provided with a sliding plate, and the side part of the sliding plate is fixedly connected with a fixing plate. A lifting threaded rod is rotationally connected to the upper portion of the fixing plate, a sliding groove block is connected to the lifting threaded rod in a threaded mode, a damping plate is arranged on the side portion of the sliding groove block, and a compression spring is arranged below the damping plate. And a larger operation space is created for workers. Compared with a traditional narrow capacity increasing box operation environment, the extensible space enables workers to check and maintain equipment more freely, operation in a narrow space is not needed, and maintenance efficiency and operation convenience are greatly improved.

The utility model discloses a high-temperature pipeline hanging type steel structure support and belongs to the technical field of pipeline supports, lifting threads are arranged at the outer ends of lifting limiting rods in a winding mode, limiting rods are installed on the two sides of a rotary disc, and the rotary disc and the limiting rods rotate up and down to ascend and descend along the lifting threads on the lifting limiting rods. The lifting limiting rod and the sliding block move along the two sides of the transverse sliding rail, the functions of left-right adjustment and rotary steering are achieved, a lifting driving cavity is formed in the limiting rod, a lifting gear is rotationally installed in the lifting driving cavity and is in driving connection with a driving part, and a movable part is installed on the inner side of the limiting rod in a lifting mode. Lifting driving holes are formed in the two sides of the movable part correspondingly, the lifting gears are meshed with the lifting driving holes, heat dissipation partition blocks are distributed on the inner side of the movable part, and a pipeline body is placed on the inner ring of the movable part. And the lifting gear rotates to drive the movable part to achieve the stable and automatic lifting function.

The utility model provides a kind of equipment mobile trolley, including two symmetrical support base plate, four corners of the bottom of two support base plate are uniformly provided with million slide wheel, four corners of top are uniformly provided with support rod, the top of support rod is provided with top box, liftable placing table is movably arranged between two support base plate, two sides of the top of liftable placing table are symmetrically provided with connecting frame, the outside of connecting frame is provided with two sliding sleeves, two sliding sleeves are respectively sleeved on corresponding two support rods, rotatable lifting lead screw is further provided between two support base plate and top box, the outside of connecting frame is provided with lifting threaded sleeve, which is screwed on the outside of corresponding lifting lead screw. By setting liftable placing table structure between two symmetrical support base plate, stable lifting of liftable placing table is realized, effectively overcome the height difference problem caused by moving wheel of traditional trolley, so that welding machine and other equipment can be more easily moved from ground to liftable placing table.

The utility model relates to the technical field of flange machining, in particular to a speed reducer flange machining die which comprises a base, a hydraulic rod is fixedly installed on the surface of the base, a clamping threaded rod, a corner threaded rod, a lifting threaded rod and a die holder are arranged, by means of the synergistic effect of the structures, the clamping threaded rod can synchronously drive clamping seats A and B which are symmetrically distributed, and the clamping seats A and B can be synchronously driven by the hydraulic rod. The rapid centering and uniform clamping of the flange are achieved, deformation caused by uneven stress is avoided, a corner motor accurately controls synchronous rotation of the clamping plates A and B, the flange is flexibly adjusted according to a preset angle, the multi-angle machining requirements of inclined planes, beveled edges and the like are met, a lifting threaded rod is matched with a lifting sliding rod, a die holder is driven to symmetrically ascend and descend, and the flange centering and clamping device can adapt to clamping of flanges of different heights and can also adapt to clamping of the flanges of different heights. And the machining height can be dynamically adjusted when the flange rotates, it is ensured that the cutter and the workpiece are kept at the optimal cutting position, the device is suitable for production of multi-specification and high-precision speed reducer flanges, and a solution is provided for efficient machining of complex workpieces.

The utility model discloses a beam reinforcing structure for old house transformation, which comprises a T-shaped expansion block, a lifting concave limiting block and a lifting expansion structure, and the T-shaped expansion block and the lifting concave limiting block are connected with each other through the lifting expansion structure. Through the unique lifting expansion structure design, stable connection and flexible adjustment of the T-shaped expansion block and the lifting concave limiting block are achieved. The lifting driving handle is rotated, the lifting threaded rod can be driven to rotate through the lifting driving shaft and the lifting bevel gear set, then the lifting threaded pipe and the T-shaped extension block are driven to stably ascend and descend in the lifting concave limiting block, and meanwhile accurate limiting is achieved in cooperation with the lifting sliding block set and the lifting sliding way groove set.