Abstract: A rotary member combination device and a connecting shaft thereof are provided. The rotary member combination device includes at least a first rotary member and a second rotary member, and further includes a connecting shaft between the first rotary member and the second rotary member. At least one of the first rotary member or the second rotary member is connected to the connecting shaft by a spiral groove and a boss structure matching the spiral groove. For the connecting shaft used in the rotary member combination device, the connecting shaft is provided with a first boss or a third spiral groove matching the first rotary member of the rotary member combination device.

Abstract: A vibration device belongs to the field of vibration machinery technologies, and includes an eccentric vibrator, a vibration motor, and a servo linear motion system. The eccentric vibrator includes at least a first eccentric body, a second eccentric body, and a connecting shaft. At least one of the first eccentric body or the second eccentric body is connected to the connecting shaft by a spiral groove and a boss structure matching the spiral groove. The servo linear motion system is connected to the connecting shaft. The servo linear motion system pushes the connecting shaft to move linearly, and drives the second eccentric body to rotate in a circumferential direction, and the first eccentric body remains stationary, so that adjustment of relative positions of the first eccentric body and the second eccentric body in the circumferential direction is implemented, and the purpose of controlling the magnitude of an exciting force in real time in a working process of equipment is implemented.

Abstract: An ultrasonic strengthening method for improving the fatigue life of a metal work-piece and its application, by clamping the metal work-piece on the ultrasonic machining lathe, ultrasonic machining of the surface of the metal work-piece with ultrasonic machining tool. The present invention focuses on presetting the compressive stress on the surface of the metal work-piece by adjusting the pressure of the ultrasonic machining tool on the surface of the metal work-piece, to eliminate the residual stress and to improve the fatigue life of the work-piece eventually. Meanwhile, the present ultrasonic strengthening method can refine the surface grain of the metal work-piece, improve the surface microhardness, wear resistance, and corrosion resistance of the surface of the metal work-piece, eventually to improve the fatigue life of the metal work-piece.

Abstract: An ultrasonic machining method to improve the wear resistance of locomotive wheels includes ultrasonic machining by ultrasonic machining tool head on the wheel rim and/or surface of the tread that is rotated along the main axis. The ultrasonic machining method mentioned in the invention can not only process the locomotive wheel just after leaving factory, but also repair the worn locomotive wheel. After machining the rim and/or tread of the locomotive wheel with ultrasonic machining, the surface tensile stress of the rim and/or the tread surface will become compressive stress, the surface roughness will be greatly reduced, and the ideal compressive stress will be preset on the surface.

Abstract: An LED lamp tube with improved sealing and cooling performance includes a plastic tube shell, an LED lamp strip, a metal casing and two end caps. The plastic tube shell is elongate and includes a light condensing structure and a light reflection structure integrally formed by extrusion and an installation chamber formed between the light condensing structure and the light reflection structure. The LED lamp strip is held in the installation chamber and at one side of the light reflection structure. The metal casing is coupled on the outer side of the light reflection structure. Each of the end caps is coupled on each of two ends of the plastic tube shell, thus can achieve IP67 waterproof and dustproof level, and also can resolve cooling problem of the lamp tube.

Abstract: An LED lamp tube with improved sealing and cooling performance includes a plastic tube shell, an LED lamp strip, a metal casing and two end caps. The plastic tube shell is elongate and includes a light condensing structure and a light reflection structure integrally formed by extrusion and an installation chamber formed between the light condensing structure and the light reflection structure. The LED lamp strip is held in the installation chamber and at one side of the light reflection structure. The metal casing is coupled on the outer side of the light reflection structure. Each of the end caps is coupled on each of two ends of the plastic tube shell, thus can achieve IP67 waterproof and dustproof level, and also can resolve cooling problem of the lamp tube.