5results about How to "Change elasticity" patented technology

This invention relates to the field of trampoline technology, specifically to an adjustable spring-loaded trampoline and its elasticity adjustment method. The adjustable spring-loaded trampoline includes a support frame; it also includes: a first spring assembly comprising multiple first spring plates connected at their tails; an elasticity adjustment assembly comprising multiple second spring plates connected at their tails; a limiting assembly for limiting the height of a fixed post; and the second elasticity adjustment assembly for adjusting the initial elasticity of the trampoline. In this invention, rotating the adjusting bolt causes the slider to move up and down, deforming the second spring plates and thus changing their elasticity, thereby altering the trampoline's elasticity. This allows for adaptation to different user requirements regarding elasticity. When the second spring plate's elasticity is insufficient, a servo motor can drive a sliding disc to move up and down, compressing or releasing the adjusting spring, thereby changing the initial elasticity of the adjusting spring and thus adjusting the trampoline's elasticity.

The utility model discloses a kind of elastic adjusting devices of cloth press wheel of open width machine, it is related to cloth press wheel adjusting technical field.The utility model includes adjusting mechanism and open width machine, adjusting mechanism front is provided with winding mechanism, the left side and right side of open width machine are fixedly connected with protective box, motor one is fixedly connected at the top of protective box in right side, the bottom output end of motor one is fixedly connected with threaded rod by coupling.The utility model is through setting press wheel, specifically is motor one start driving threaded rod to rotate, then again by threaded rod rotation to drive moving plate to move downward, since the press wheel at this time will be subjected to the tension of cloth, so that press wheel moves upward, so when moving plate moves downward, spring is extruded, so that the elasticity of spring changes, and press wheel moves, so that cloth bottom and lower press wheel, avoid the situation of skidding.

This invention provides an underwater bistable variable stiffness rigid-flexible coupled hydraulic mechanical gripper, belonging to the technical field of robot end effectors. This manipulator combines flexible fit with gripping stiffness and offers a fast response speed. The drive module, finger modules, transmission module, and variable stiffness module are all mounted on a support module. The output of the drive module is connected to each finger module via the transmission module, and the output of the variable stiffness module is connected to each finger module via the bistable module. The drive module's operation drives multiple finger modules to perform gripping actions through the transmission module, while the variable stiffness module's operation adjusts the structural stiffness of multiple finger modules through the bistable module. This mechanical gripper integrates the lossless compliance of soft actuation, the high-speed response of a bistable mechanism, and the strong load-bearing capacity of a rigid structure. It can stably grip objects of different masses and shapes in underwater environments, exhibiting strong adaptability and high operational efficiency.

This utility model discloses an adjustable normally closed electromagnetic expansion valve, including a valve body, a transmission rod assembly, a valve core assembly, and a steel ball seat assembly. The valve body is provided with a flow channel 1, a flow channel 2, a flow channel 3, and a valve cavity. Flow channel 2 and flow channel 3 are located on both sides of the valve cavity. The valve body is also provided with a longitudinally arranged transmission cavity and an adjustment cavity. The steel ball seat assembly is fixed in the adjustment cavity, the transmission rod assembly is installed in the transmission cavity, and the steel ball seat assembly is fixed in the adjustment cavity. The steel ball seat assembly includes a connecting block, an adjusting screw, an adjusting spring, a steel ball seat, and a steel ball. The diameter of the steel ball is larger than the diameter of the valve cavity. The adjusting screw is threadedly connected to the connecting block, and one end of the adjusting screw passes through the connecting block and abuts against the lower end of the adjusting spring. This utility model has a reasonable structure. By changing the length of the adjusting block inserted into the valve core tube, the position of the moving block can be adjusted, thereby adjusting the opening degree of the valve core assembly.

The application discloses a 3D-printed implant with arc-shaped pipelines and a preparation method thereof, which is used for being implanted into an alveolar bone implantation nest of a patient, and the implant comprises a dense core body and a bone bonding part wrapped outside the dense core body; the bone bonding part comprises a first porous part and a second porous part; the first porous part is connected with the top surface of the second porous part; a plurality of arc-shaped pipelines are arranged in the first porous part; the arc-shaped pipelines are provided with openings at two ends and are communicated with the outside through the openings; the arc-shaped pipelines are extended into a cleaning part through the openings to clean the interiors of the arc-shaped pipelines. The interiors of the arc-shaped pipelines can load drugs (such as BMP-2, VEGF, PDGF and the like) to induce the rapid growth of bone tissues. The implant has the characteristics of good strength, matched elastic modulus of the bone bonding part and the patient and easy cleaning. The implant has a wide indication and is suitable for various edentulous patients, especially for the cases of insufficient alveolar bone mass or bone density.