60results about How to "Controllable force" patented technology

The invention provides a leg flexibility training device for dance classes and belongs to a dance training tool. The device comprises a column as well as a second training assisting module, a third training assisting module and a first training assisting module which are arranged on the column from top to bottom sequentially, wherein a controller and a display screen are arranged in the first training assisting module. The device is reasonable in structure, the height of the column is convenient to adjust, leg flexibility can be trained gradually, the device is applicable to different human groups, the function of the overall device is complete by means of different assisting modules that are arranged, comprehensive leg flexibility training can be assisted, the flexibility degree of the legs is judged through the change of pressure, and the leg continuity is improved to a height without assistance of others. The device is safe to use and convenient to operate, the leg flexibility can be examined visually, applied force is controllable during training, safety accidents such as strain, sprains and the like are effectively prevented, and the accuracy and the grace of the dancing posture are guaranteed.

The invention discloses an impact adjustable internal puller, which comprises a handle rod, an adjusting rod, an impact hammer and a clamping claw component, wherein the handle rod is constituted by a hollow circular tube; the front end of the handle rod is welded with a supporting frame, and the rear end of the handle rod is provided with a handle; the root part of the handle is welded with a fixed disc; the supporting frame consists of a left lug seat and a right lug seat; the impact hammer is sleeved on a polished rod part of the handle rod; the clamping claw component consists of a left pulling claw, a right pulling claw, and a tension slide block and a tension spring which are arranged between the left pulling claw and the right pulling claw; the middle part of the tension slide block is provided with a threaded hole; the adjusting rod is constituted by an iron stick and is penetrated in the handle rod; the front end of the adjusting rod is provided with a threaded head, and the rear end of the adjusting rod is provided with a hexagon nut; the threaded head at the front end of the adjusting rod is screwed with the threaded hole on the middle part of the tension slide block; and the hexagon nut at the rear end of the adjusting rod is pressed against an orifice at the rear end of the handle rod. The product is smooth to operate, convenient and easy to use, fast to disassemble, time-saving and labor-saving and is suitable for disassembling bearings of various specifications.

The embodiment of the invention provides a heat radiator shared by multiple chips and a circuit board provided with the heat radiator. The heat radiator comprises a base plate, wherein the upper surface of the base plate is provided with multiple radiating fins; the lower surface of the base plate is provided with at least one boss mutually contacted with the upper surface of a first chip on the circuit board; and the edge of the base plate is provided with a limiting bracket used for supporting the base plate on the circuit board. The invention further provides a circuit board provided with the heat radiator. The boss is arranged on the base plate of the heat radiator and the limiting bracket is arranged on the base plate, so that the heat radiating area can be expanded to the whole circuit board and can be enlarged, and the heat-radiating capability can be enhanced; and meanwhile, multiple different types of chips can share the heat radiator, so that the stress of the chip is controllable, and the risk that the stress of the chips is overlarge, and the bonding point of the circuit board is subjected to creep deformation is solved.

The invention relates to a ring rolling mill capable of driving and controlling rotation of a core roller. The ring rolling mill comprises the core roller and a driving roller which can initiatively rotate and conduct linear feeding. The ring rolling mill is characterized in that the core roller can initiatively rotates and is controllable in speed, and the core roller can achieve switching of the two modes of initiative driving and follow moving in the working process. According to the ring rolling mill, the driving roller initiatively rotating and driving and the core roller initiatively rotating and driving can be adopted at the same time, in the rolling process, stress of a deformation area of a rolled ring part is controllable by controlling the rotating speed of the core roller, matched friction force can be generated on the inner and outer contact surfaces of the rolled ring part, so that uniform radial deformation is generated, and thus the uniformity of the internal texture of the rolled ring part is greatly improved; the ring rolling mill is low in cost, easy to achieve and suitable for production of ring-shaped parts which are high in material microstructure uniformity requirement, good in quality and precision retainability and long in service life.