7results about How to "Reduce fatigue strength" patented technology

This utility model discloses a gauge for testing exhaust pipes, including a fixing component. The fixing component includes a base, and a fixing clamp for fixing the exhaust pipe is installed on the top end face of the base. A support component is installed on one side wall of the fixing component, and a test component is slidably connected to the inner wall of the support component. Limiting components matching the test component are installed on both sides of the inner wall of the support component. A control component is threadedly connected to the bottom end of each set of limiting components. The limiting component includes a pair of hollow shells, and several sets of guide blocks are slidably connected to one side wall of the hollow shells. Compared with the prior art, this utility model's gauge for testing exhaust pipes eliminates the need for staff to frequently raise the impact blocks in impact testing laboratories. Furthermore, the height of the impact blocks can be adjusted according to actual testing needs to obtain different test results, greatly reducing staff fatigue and increasing the accuracy of experimental results.

The present invention relates to a steel material comprising, in mass%, 0.30%≤C≤0.45%, 0.10%≤Si≤1.00%, 0.60%≤Mn≤1.20%, 0.20%≤Cr≤0.70%, 0.30%≤V≤0.47%, Ti≤0.015%, P≤0.100%, and S≤0.080%, the balance being Fe and unavoidable impurities, and having a P0 value defined by P0=P0'×V / P1, satisfying P0≥0.30, where P0'=Mn+0.49Cu+0.89Ni+0.40Cr-0.30Si, and P1=C+0.07Si+0.16Mn+0.61P+0.19Cu+0.17Ni+0.2Cr+V, in the formula, each element symbol represents the content of each element in mass%.

This utility model discloses a rebound hammer for non-destructive testing of UHPC compressive strength, belonging to the field of concrete engineering testing technology. It includes a hollow shell, an impact rod, an impact hammer, an impact spring, a guide rod, a hook assembly, and a switch. The impact rod is telescopically connected to one end of the shell. One end of the impact spring is fixed, and the other end is connected to the impact hammer. Both the impact hammer and the hook assembly are slidably connected to the guide rod. The hook assembly can slide along the guide rod and engage with the impact hammer. The switch controls the release of the impact hammer by the hook assembly. The free length of the impact spring is 134.4±0.5mm, and the impact length after stretching is 140.0±0.5mm. The wire diameter of the impact spring is greater than 1.5mm. The UHPC compressive strength regression equation is: ; the value of c ranges from -0.001 to -0.004, where is the average rebound value of the test area or specimen, is the average carbonation depth of the test area, and is the converted value of concrete strength in MPa. This enables non-destructive testing of the compressive strength of UHPC.

The utility model discloses a kind of breathable comfortable driving shoes, including shoe sole and vamp, vamp is breathable vamp, the convex edge is set to the bulge edge of shoe sole outer side edge corresponding fifth metatarsal bone position, convex edge is attached on vamp towards shoe outer side, shoe sole heel extends to corresponding heel, and is attached on vamp, so that shoe heel forms camber surface, the waist piece for being used to support foot is embedded on shoe sole on corresponding arch area, and breathable hole is set on waist piece, and the vent hole that communicates with breathable hole is set up on big bottom.The utility model is in the corresponding area of fifth metatarsal bone when wearing, and when collision, lateral impact energy is dispersed, foot peak stress is reduced, and wearing is more comfortable, shoe heel and shoe sole plane are smoothly connected, transition is smooth, reduce the contact distance of heel and vehicle ground, set waist piece, and set breathable hole, cooperate the vent hole of shoe sole and breathable vamp can realize the directional airflow circulation of "shoe sole→in shoe→vamp", improve ventilation efficiency, while maintaining lateral torsional stiffness.

This utility model relates to the field of quenching technology for high-elasticity spring production, specifically a rapid quenching device for stainless steel bars used in high-elasticity spring production. The device includes a base column and a worktable. An induction control box is fixedly connected to the upper surface of the worktable. Three induction copper tubes, all arc-shaped, are provided on one side of the control box. A clamping device is provided on the upper surface of the worktable, comprising a sliding groove. The groove is formed on the upper surface of the worktable, and a first screw is rotatably connected to the inner wall of the groove. A slider is slidably connected to the inner wall of the groove, and the slider is threadedly connected to the first screw. This utility model solves the problem that existing quenching equipment requires manual clamping of the bars using special tools, which easily leads to burns to operators during quenching and significantly increases labor costs due to prolonged clamping.

This application provides a ureteroscopic robot, relating to the field of medical device technology, comprising: a base; a lifting mechanism fixedly connected to the base for driving the lifting and lowering movement of the ureteroscopic endoscope; a horizontal feeding mechanism connected to the lifting end of the lifting mechanism for driving the horizontal forward and backward movement of the ureteroscopic endoscope; a rotating mechanism connected to the horizontal feeding mechanism, wherein the ureteroscopic endoscope is mounted on the rotating mechanism, and the rotating mechanism drives the ureteroscopic endoscope to rotate; a bending mechanism connected to the rotating mechanism for driving the ureteroscopic endoscope to bend; and a fiber optic delivery mechanism connected to the robot body and positioned close to the ureteroscopic endoscope for delivering optical fibers into the fiber optic channel of the ureteroscopic endoscope. This application achieves precise lifting, forward and backward movement, rotation, and bending of the ureteroscopic endoscope, as well as stable delivery of optical fibers, improving control precision, reducing the difficulty of surgical operations, and enhancing the stability of the overall machine operation, thereby effectively ensuring clinical operational efficiency and reliability.

This utility model provides a novel double-headed edge banding strip winding device, comprising a housing, a winding drive motor, an electrical control device, and an edge banding strip winding mechanism. The housing is equipped with a rotating worktable. The winding drive motor is electrically connected to the electrical control device, and its power output end is connected to the rotating worktable. The edge banding strip winding mechanism includes a transverse cylinder and a lifting cylinder. The transverse cylinder is connected to the electrical control device and an external air source via a solenoid valve, and its power output end is equipped with a pair of lifting cylinders. Each lifting cylinder is connected to the electrical control device and an external air source via a solenoid valve, and its power output end is detachably mounted with a winding chuck via a lifting mounting frame. An edge banding strip clamp is mounted on one side of the winding chuck. A positioning sensor is provided on one side of the lifting mounting frame. The positioning sensor is electrically connected to the electrical control device. This utility model has a compact structure, low manufacturing cost, and can efficiently achieve alternating continuous winding of multiple types of edge banding strips, improving edge banding strip winding efficiency and reducing edge banding strip production costs.