7results about How to "Change the stiffness" patented technology

The invention relates to the technical field of vehicles, in particular to an air spring rigidity adjusting system and a vehicle. The air spring rigidity adjusting system comprises two air spring sets which are oppositely arranged on the two sides of the vehicle, and each air spring set comprises at least one air spring. The air storage device comprises at least two air storage cylinders, and the air springs are connected with the air storage cylinders through air paths; the valve group comprises a plurality of valves, and the plurality of valves are respectively arranged in the gas path; the air spring is used for being communicated with different air storage cylinders through opening and closing of the multiple valves. The air springs are communicated with the air storage cylinders with different volumes to adjust the rigidity of the air springs, so that the rigidity of the air springs on the two sides of the vehicle can be changed, the rigidity of the air springs on the two sides of the vehicle can be switched in real time according to the driving condition of the vehicle during driving, and the vehicle obtains excellent stability and trafficability.

The application discloses a piezoelectric driving mechanism bending deformation variable stiffness scanning probe, which comprises a base, a deformation mechanism and a probe needle, the deformation mechanism comprises two deformation units which are fixed in a stack, the deformation unit comprises a circular ring and at least three V-shaped cantilever beams, the at least three V-shaped cantilever beams are arranged in the circular ring, one end of the at least three V-shaped cantilever beams is connected with the circular ring, and the other end is connected with each other and the connection position is located at the center of the circular ring; piezoelectric driving units and strain sensing units are arranged between the V-shaped cantilever beams of the two deformation units, and all the piezoelectric driving units are connected in parallel; the circular rings of the two deformation units are fixedly connected with the base, and the probe needle is connected with the other end of the V-shaped cantilever beams. The application can realize the large-range variable stiffness of the scanning probe to adapt to different modulus surfaces while the static and dynamic performances of the scanning probe are considered.

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.

The present application relates to the technical fields of energy collection, and particularly relates to a electromagnetic-piezoelectric-friction composite energy collector for low-frequency vibration energy, which comprises an electromagnetic power generation unit, a piezoelectric power generation unit, a friction power generation unit and a tuning mechanism, the electromagnetic power generation unit comprises a coil, a rolling magnet, a center magnet and a return magnet, the coil is embedded in the lower surface of the upper shell and the upper surface of the lower shell in two layers, corresponding to the sweeping area of the rolling magnet and connected in series; the piezoelectric power generation unit comprises a contact piezoelectric module and a collision piezoelectric module, the contact piezoelectric module is a cantilever beam structure, the friction power generation unit comprises a friction layer arranged on the outer surface of the rolling magnet and multiple groups of electrodes; the present application solves the technical problems of single piezoelectric transduction mode, low control precision and complicated operation in the prior art.

This invention provides a transnasal interventional variable stiffness flexible bone-grinding robot and a stiffness control method, comprising a grinding mechanism, an inner arm drive mechanism, and an outer arm drive mechanism. The outer arm continuum of this application is composed of snake bone continuum units, which enable it to have both high flexibility and high stiffness. After the outer arm continuum enters the surgical cavity, it can provide a high-stiffness working space for the inner arm continuum and the drill bit. By simultaneously axially stretching / compressing the tendon, the compression or extension of the distal spring of the inner arm continuum can be controlled, thereby changing the stiffness of the distal end of the inner arm continuum. When feeding, the spring is stretched to reduce stiffness, making it more flexible and conducive to reaching the surgical area. When the grinding drill bit is working, the spring is compressed, making it have high stiffness so that it does not damage non-disease tissue when the drill bit grinds bone, realizing the function of adjustable stiffness, which is more conducive to the needs of surgical operation.

The application relates to the technical field of vibration reduction, and discloses a control method for a vibration reduction device, which is applied to the vibration reduction device, the vibration reduction device being an inner-outer double-layer structure capable of being folded or unfolded; the stiffness of the vibration reduction device is different when the vibration reduction device is in a folded state or an unfolded state; the control method comprises the following steps: acquiring the operating frequency of a compressor; determining the target state of the vibration reduction device according to the operating frequency of the compressor; and controlling the operation of the vibration reduction device according to the target state. In this way, the stiffness of the vibration reduction device is changed by controlling the folding and unfolding of the vibration reduction device, and the modal frequency of the compressor is changed. Therefore, the compressor can be prevented from resonating, and the vibration reduction effect of the vibration reduction device on the compressor is improved. The application further discloses a control device for the vibration reduction device, an air conditioner and a storage medium.

The utility model relates to the technical field of rehabilitation instruments, and discloses a limb rehabilitation training device with a variable stiffness function, which comprises a casing, a support frame is fixedly mounted in the casing, two pairs of bearing seats are fixedly mounted in the support frame, and rotating shafts are rotatably mounted in the bearing seats; a guide shaft support is rotationally mounted in the center of the supporting frame through a rotating seat, one end of a guide shaft is fixedly mounted in the guide shaft support, and the guide shaft is sleeved with a sliding block; the ends, away from each other, of the two rotating shafts on the upper side are each rotationally provided with one end of a swing rod, the other ends of the swing rods are fixedly provided with the same cross rod, the sliding blocks are provided with elastic pieces, and the supporting frame is provided with an adjusting assembly used for lifting the sliding blocks. The limb training rigidity of a patient can be changed, the structure is simple, work is stable, and therefore on the premise that man-machine interaction safety is guaranteed, the control accuracy of the training device can be kept accurate for a long time, and the device is more reliable in overall operation, longer in service life and better in durability.