33results about How to "Reduce uneven stress" patented technology

The invention relates to a transport component and a transport method suitable for wide and large-span prefabricated slabs, the transport component comprises a bearing seat, the bearing seat comprises a supporting pin seat and two supporting beams, the supporting beams are arranged on the supporting pin seat in a penetrating mode, two limiting beams are installed on the supporting beams, and the limiting beams can slide along the supporting beams in a reciprocating mode and are fixed to the supporting beams; the supporting seat comprises a supporting base and a supporting top seat which is spirally connected to the supporting base; and the damping seat comprises a damping base, a connecting seat, a damping top seat, a plurality of limiting rods and a plurality of first damping springs, the connecting seat is spirally installed on the damping base, the limiting rods are installed on the connecting seat, the first damping springs are arranged on the limiting rods in a penetrating mode, and the damping top seat is arranged on the limiting rods in a penetrating mode. The components are located on the same horizontal plane through the supporting seat and the bearing seat, so that the situation that the stress of the components is not uniform is greatly reduced, and the situation that the components are damaged due to the non-uniform stress in the transportation process is avoided.

The invention relates to an integrated motor speed reduction driving system for a helicopter empennage. The integrated motor speed reduction driving system comprises a disk type motor and a two-levelspeed change mechanism, wherein the disk type motor comprises a stator, a rotor, a roller bearing and a bearing bracket; the two-level speed change mechanism comprises a speed change box body, an output shaft, two gear pairs, a middle shaft and a synchronizer. The improvement is that: the integrated motor speed reduction driving system further comprises a split type middle transmission mechanism;the middle transmission mechanism comprises a rotary sleeve arranged on the output shaft in a sleeving manner, a rotary bracket, a first rotary body, a second rotary body, a third rotary body and thelike. The split type structure of the integrated motor speed reduction driving system reduces non-uniform stress on the output shaft, avoids the impact influence on the output shaft in a gear shiftingprocess, and guarantees stable operation of a helicopter tail rotor. A power end of the integrated motor speed reduction driving system for the helicopter empennage is directly output from a rotor end of the disk type motor, so that high integration of the integrated structure of a motor speed reducer is realized; the disk type motor is powered by an APU or a battery, so as to fulfill the aim ofelectrically driving a helicopter to be balanced or change the direction.

The invention discloses an environment-friendly high-precision aluminum alloy profile extruder which comprises a base frame, a hydraulic cylinder, a material liner and a die. An abutting block is welded to the side, corresponding to a slide way, of the top end of the base frame. A cooling mechanism is arranged on one side of the abutting block. A cooling water box is welded to the top of the surface of one side of the abutting block. A second air inlet pipe staggered with a first air inlet pipe is arranged on the surface of the outer side of the cooling water box. An air inlet cover is weldedto the top end of a carrying box. A plurality of exhaust pips are inserted in the bottom end of the carrying box in a penetrating mode. A supporting plate is installed at the position, corresponding to the exhaust pipes, of the top in the carrying box. A draught fan is installed in the middle of the supporting plate. The input end of the draught fan is electrically connected with the output end ofan external power supply. Waste and scraps are carried by a drawer and a filter screen to be recycled, polluting substances generated at a high temperature are absorbed through a filtering mechanism,the harm of the waste, scraps and polluting substances to the environment is effectively avoided, and the environmental protection aim is realized.

The invention discloses an elevated steel-concrete composite beam, comprising a cross beam and a pier column. The cross beam is fixedly connected to the top of the pier column, and both sides of the bottom of the inner wall of the cross beam are slidably connected to a transmission seat. A sliding seat is slidably connected to the left side, and steel beams are fixedly connected to the tops of the two sliding seats. A concrete slab is fixedly connected between the tops, a rectangular groove is formed at the bottom of one of the transmission seats and the top of the other transmission seat, and the two transmission seats are slidably connected to the bottom of the inner wall of the beam in a symmetrical dislocation. In the invention, the two sides of the bottom of the concrete slab are subjected to force at the same time, no longer descending, the force is decomposed and converted, the uneven stress on the concrete slab is reduced, the stability of the overall structure of the concrete beam is improved, and the main column is straight. Rod shape, vertical and horizontal force, no bending phenomenon.

The invention discloses a special-shaped screen mask strip structure and a preparation method thereof, the special-shaped screen mask strip structure comprises a metal mask strip main body, the surface of the metal mask strip main body is provided with a plurality of groups of etching areas which are distributed at equal intervals, and the etching areas are arranged in a rectangular shape; the etching area comprises an effective area which is circularly arranged and a buffer area which is positioned on the outer side of the effective area and is rectangularly arranged; a plurality of groups of double-sided etching holes formed by adopting a double-sided etching process are uniformly distributed in the effective region, a plurality of groups of single-sided etching holes formed by adopting a single-sided etching process in the back surface of the metal mask strip main body are uniformly distributed in the buffer region, and an unetched layer for preventing an organic material from being evaporated is reserved on the surface of each single-sided etching hole. According to the invention, the structure of the surrounding area of the special-shaped screen is changed, and the buffer area is designed to reduce the phenomenon of non-uniform stress. According to the method, the net stretching yield of the mask strip for the special-shaped screen is improved, the deformation and wrinkle conditions of a special-shaped effective area are reduced, and the color mixing risk is reduced.

The invention discloses an easy-to-operate foreign matter cleaning device for distribution network lines, which includes a fixed rod, a telescopic rod, an operating handle and a hook assembly. One end of the fixed rod away from the operating handle, one end of the through fixed rod is set as a rod hole, the upper end of the rod hole is provided with a first fixed knife pin, and the lower end of the rod hole is provided with a second fixed knife pin, so A first slider is fixedly arranged on one side of the slideway, and a second slider is arranged on the other side of the slideway, and the telescopic rod is arranged at the lower ends of the first slider and the second slideway. The foreign matter cleaning device of the present invention not only facilitates the cleaning of foreign matter on the distribution network, but also effectively avoids damage to the insulation layer of the distribution network during the cleaning process, thereby effectively improving the working accuracy and effectively improving the work efficiency of the staff. efficiency.

The invention relates to the technical field of circuit board production, in particular to a forming method of a unit board having at least one single-segment board edge. The present invention firstly cuts the unit boards located on the outer periphery of the unit board array and at the corners of the unit board array, and the inner side of the board is a multi-line segment board with fewer side boards, so that the influence of cutting each unit board on the cutting of the next unit board can be minimized , that is, after each cutting, each point of the straight line segment on the outer edge of the unit plate located on the outer periphery of the unit plate array in the same direction as the outer plate edge is consistent with the distance from the newly cut process edge plate edge or minimizes the inconsistency of the distance Therefore, it can avoid or reduce the uneven force in the cutting process due to the inconsistent distance between a straight line segment on the outer edge of the outer edge and the edge of the process plate, so as to make the force on the outer plate edge uniform or reduce the uneven force during cutting. The appearance of concave and convex positions can ensure the dimensional accuracy of the unit board.