9 results about "Motion resistance" patented technology

The invention discloses a self-adaptive propeller hanging system and a damping control method, and belongs to the technical field of heavy component hoisting. The system comprises a main heavy frame, a universal hinge mechanism and a self-adaptive hydraulic damping unit, the self-adaptive hydraulic damping unit comprises a cylinder barrel, a valve element and a self-adaptive valve set, one end of the valve element is connected with a propeller assembly, and the self-adaptive valve set is used for dynamically adjusting hydraulic motion resistance acting on the valve element when the lifting posture of a propeller is changed. According to the damping control method, a target damping adjusting mode is judged through posture and pressure parameter fusion, switching among a reference damping mode, an impact suppression damping mode and a locking damping mode is achieved, and automatic resetting is achieved through a spring after the locking state is relieved. According to the scheme, swing and impact of the propeller in the hoisting process can be effectively restrained, and the hoisting stability and safety are improved.

The present invention provides a vehicle equipped with a suspension-controlled motion resistance member. [Solution] The vehicle includes a body and a chassis coupled to the base of the body. The vehicle further includes a motion resistance member coupled to the base surface of the chassis, a wheel assembly coupled to the chassis, and a suspension unit coupled to the wheel assembly and the chassis. In operation, the suspension unit is configured to move the chassis in a first direction until at least a portion of the motion resistance member contacts the ground below the base surface of the chassis.

The buffering mechanism of the engine braking rocker arm comprises an elastic body, the elastic body is arranged between the rocker arm and a rocker arm shaft, the elastic body abuts against the rocker arm and the rocker arm shaft, and elastic deformation of the elastic body exerts acting force between the rocker arm and the rocker arm shaft. When the rocker arm is driven to move, the motion resistance of the rocker arm on the rocker arm shaft is caused, the motion resistance keeps the rocker arm in two non-collision positions on the rocker arm shaft, and in the two non-collision positions, one end of the rocker arm avoids driving of an engine cam, and the other end of the rocker arm avoids acting with an engine valve. The rocker arm does not move in the ignition period of an engine, mechanism flying-off, friction and oil consumption are eliminated, and the use frequency is greatly reduced.

A positioning mechanism of an engine brake rocker arm comprises a positioning bolt and a positioning spring, one end of the positioning bolt is fixedly connected with a rocker arm shaft, one end of the positioning spring abuts against the other end of the positioning bolt, and the other end of the positioning spring movably abuts against the rocker arm. And the positioning spring enables motion resistance to be generated between the rocker arm and the rocker arm shaft. The rocker arm does not move in the non-engine braking operation period, flying-off, friction and oil consumption of the mechanism are eliminated, the use frequency is greatly reduced, and the whole mechanism does not occupy space (especially not heightened) and not weighted, and is compact in structure, convenient to install, low in cost, durable and reliable.

The application discloses a self-adaptive propeller hanging system and a damping control method, and belongs to the technical field of heavy component hoisting. The system comprises a main bearing frame, a universal hinge mechanism and a self-adaptive hydraulic damping unit. The self-adaptive hydraulic damping unit comprises a cylinder, a valve core and a self-adaptive valve group. One end of the valve core is connected with a propeller assembly. The self-adaptive valve group is used for dynamically adjusting the hydraulic motion resistance acting on the valve core when the propeller hoisting posture changes. The damping control method judges a target damping adjustment mode through posture and pressure parameter fusion, switches between a reference damping mode, an impact suppression damping mode and a locking damping mode, and realizes automatic reset by means of a spring after the locking state is released. The scheme can effectively suppress swing and impact in the propeller hoisting process, and improve hoisting stability and safety.

The invention belongs to the technical field of damping walls, and particularly relates to a self-adaptive viscous damping wall based on machine learning, which comprises a channel steel box internally loaded with viscous liquid, the channel steel box is arranged between two damper connecting wall piers, a damping body is vertically arranged in the channel steel box, a self-adaptive mechanism is arranged in the damping body in a penetrating manner, and the self-adaptive mechanism is arranged in the damping body in a penetrating manner. And tackifying mechanisms are arranged at the two ends of the self-adaptive mechanism. According to the self-adaptive viscous damping wall based on machine learning, sliding friction is converted into rolling friction through a ball structure, motion resistance and abrasion are remarkably reduced, and motion smoothness and self-balancing capacity of a damping body under complex multi-dimensional vibration are ensured; additional bending moment and stress concentration caused by mismatching of the movement direction and the structural rigidity are effectively avoided, meanwhile, the built-in belleville spring buffer module can absorb huge impact energy during extreme overload, mechanical hard limiting is provided in cooperation with the limiting groove, and dual protection is provided for the damping wall.

The invention discloses an ultra-precise three-axis air floating platform, which adopts the collaborative design of a vacuum preloading air floating guide rail and a porous throttling air floating bearing, and combines the nanoscale feedback of a high-precision linear grating ruler and the adjustment of a closed-loop control system to realize the nanoscale position repetition precision of an XY plane and the lifting precision within + / -1nm of a Z axis; the full-air-floating non-contact structure eliminates mechanical friction, the elastic buffering and self-adaptive adjusting capacity of an air film compensate machining and assembling errors, and the multi-frequency-band vibration isolation of the air-floating vibration isolation device is matched, so that vibration transmission and motion resistance are effectively reduced, the operation stability of equipment is improved, the service life of the equipment is prolonged, and the maintenance cost is reduced; the combination of gravity balancing of a friction-free air cylinder and driving of a linear motor is adopted, and guiding of a U-shaped guide rail is matched, so that friction-free lifting and sub-nanoscale position control are achieved; x / Y-axis dual-motor linkage is cooperated with the air bearing, so that the track smoothness and the dynamic response speed are improved, and the dynamic requirements of complex linkage processing or measurement are met.

Electrically operated caliper (100, 400) configured to generate current for measuring operations, wherein the caliper (400) has: a scale element (102); a slide (130); a signal processing section (150) configured to measure a displacement between the scale element (102) and the slider (130); and a power generating device (405) that is fixed with respect to the slide (130) and which has: a power-generating gear train (432) configured to rotate in response to a force, the force being applied to the gear train (432) via a power-generating handle (410) by a user moving the power-generating handle (410) relative to the gear train (432); and a generator (431) which is coupled to the gear train (432) and configured to rotate in response to a force exerted by the rotating gear train (432) and to supply current to the signal processing part (150), wherein: the power generating device (405) generates electricity while the user moves the power generating handle (410); the power-generating device (405) is configured to contribute a motion resistance force component while the user moves the power-generating handle (410); and the gear train (432) has a force-limiting clutch (432C) which is configured to limit the resistance force component of the movement and the force-limiting clutch (432C) is configured such that the resistance force component of the movement is at most 20 N while the user moves the power-generating handle (410) with a maximum hand acceleration and / or with a maximum hand speed.

The utility model provides a mountaineering machine. The mountaineering machine comprises a machine body, a resistance adjusting mechanism, a roller and two pedals, two rails are arranged on the machine body, and the two pedals are arranged on the two rails in a sliding mode respectively. The roller is rotationally arranged on the machine body, and each pedal is connected with the roller through a pull rope; the resistance adjusting mechanism is arranged between the rolling wheel and the machine body and used for adjusting the motion resistance between the rolling wheel and the machine body. According to the mountaineering machine, the motion resistance between the rolling wheels and the machine body can be adjusted through the resistance adjusting mechanism, so that the motion intensity of the mountaineering machine is adjusted, and different motion intensity requirements of people are met.