6results about How to "Reduce stress value" patented technology

The invention belongs to the technical field of high-voltage power transmission, and discloses a basin-type insulator, which comprises an insulating basin body and a central conductor, the central conductor adopts a drum-shaped revolving body structure, the side surface of the central conductor comprises a convex surface and cylindrical side surfaces at the two ends of the convex surface, the convex surface is a smooth curved surface, and the convex surface is a concave surface. The end portion of the protruding face is in transition connection with the side surface through a chamfer transition face, the protruding face and the chamfer transition face are both connected with the insulation basin body, the chamfer transition face comprises a first straight line section and a transition curved face, the first straight line section is connected with the side surface, and the connecting position of the first straight line section and the side surface is three intersection points. The included angle between the first linear section and the central axis of the central conductor is 30-60 degrees, one end of the transition curved surface is connected with the first linear section, and the other end is connected with the protruding surface. Through the reasonable structural design, the stress value at the three intersection points of the central conductor, the insulating basin body and the gas of the basin-type insulator can be reduced, the mechanical strength of the basin-type insulator is improved, and the safe operation of a power transmission line is further ensured.

This utility model discloses a support structure for lifting and lowering a trailer tailgate, relating to the field of trailer tailgate connection technology. The structure includes a support frame, a diagonal brace, a support arm, a hydraulic cylinder, and a force-distributing plate. The diagonal brace is fixed to the support frame. Mounting seat a (including mounting plate a) and mounting seat b (including mounting plate b) are mounted on the support frame. The support arm and the hydraulic cylinder are connected at both ends to the mounting seats and the trailer tailgate, respectively. The force-distributing plate connects the mounting seats and the diagonal brace. By distributing load through multi-path force transmission, it improves structural strength and stability, avoids hydraulic cylinder axis misalignment, extends service life, and ensures safe and efficient tailgate lifting and lowering.

The utility model relates to the technical field of transmission auxiliary box welding shafts, and discloses a transmission auxiliary box welding shaft structure based on argon arc welding, an intermediate shaft transmission gear is assembled on an intermediate shaft in an interference mode, and a first welding seam is formed at the welding position between one end of the intermediate shaft transmission gear and the intermediate shaft. A second welding seam is formed at the welding position between the other end of the intermediate shaft transmission gear and the intermediate shaft, the first welding seam and the second welding seam are arranged through argon arc welding, and the welding seam shapes of the first welding seam and the second welding seam are optimized, so that the welding strength of the auxiliary box welding shaft is greatly improved; and parameters of the intermediate shaft transmission gear, the intermediate shaft and the two welding seams are optimized, so that the fatigue life of the auxiliary box welding shaft is prolonged.

The utility model provides a back type hydrogen frame connecting structure, which belongs to the field of hydrogen frame connecting structures and comprises a frame and an even number of connecting components which are respectively and oppositely positioned on two sides of the frame, a vertical plate is further included; two vertical plates form a group, and the two vertical plates are respectively and oppositely positioned on two sides of the frame; the upper portion of the vertical plate is connected with the outer side of the hydrogen frame through a bolt, and the lower portion of the vertical plate is connected with the outer side of the frame through a bolt. According to the utility model, the mounting mode of the existing hydrogen frame is improved, so that the hydrogen frame is mounted by virtue of the L-shaped brackets which are connected up and down and also by virtue of the vertical plates which are simultaneously connected with the hydrogen frame and the frame through bolts, and when the vehicle runs and the hydrogen frame is subjected to acting forces in X, Y and Z directions at the same time, the hydrogen frame is prevented from being damaged. The displacement values of the bolts playing a connecting role in the X direction, the Y direction and the Z direction cannot be remarkably increased at the same time, the stress value of the bolt fixing position can be greatly reduced, and therefore the problem of bolt breakage is not prone to occurring, the fixing reliability and stability of the hydrogen frame can be improved, and the reliability of the whole vehicle is greatly improved.

The invention belongs to the technical field of drill rod threads, and particularly relates to a drill rod thread capable of improving bearing capacity distribution in the thread tooth generatrix direction and a drill rod thereof.The drill rod thread comprises an external thread connector and an internal thread connector, and the external thread connector comprises an external thread connector body; one end of the external thread joint main body is connected with a drill rod, and the other end of the external thread joint main body is sequentially provided with an external thread joint main shoulder surface, an external thread joint taper pipe thread and an external thread joint auxiliary shoulder surface which are matched with the internal thread joint; and a main shoulder root groove is formed between the main shoulder surface of the external thread joint and the taper pipe thread of the external thread joint. The circular bead structure is changed into the main shoulder root groove, and the maximum stress value point of the external thread is transferred to the main shoulder root from the first ring tooth root at the thread connection part, so that the stress value of the main shoulder side root of the external thread can be effectively reduced, the stress concentration is reduced, and the service life of the thread tooth is prolonged.

This utility model discloses a submersible axial flow pump inlet horn that combines bottom-coupled installation and cavitation resistance, relating to the field of submersible axial flow pump improvement. It includes an inlet horn with an expanded hollow cylinder, flanges at both ends, and stainless steel wear-resistant rings fitted to the inner wall, the length of which covers the impeller blades. The mounting flange is fixed to the guide vane body with a stepped annular protrusion, and an even number of reinforcing ribs are provided between the flanges. A vertical protrusion is provided on the outer side of the inlet end. During operation, the horn-shaped structure guides the water flow smoothly in, the wear-resistant rings resist cavitation, and the reinforcing ribs and protrusions enhance the installation rigidity and stability, achieving efficient axial propulsion of the water flow. Compared with existing technologies, this design shortens installation and disassembly time, reduces stress values, reduces noise by 10-15 decibels, is compatible with multiple pump models, and reduces carbon emissions, combining installation convenience with environmental and energy-saving advantages.