摘要:
A viscoelastic damping apparatus is mounted to a structure which is moved by at least two linear step motor armatures in a stepby-step manner simultaneously or sequentially in each of two coordinate directions. The step motor armatures each include electromagnetic motor poles which are excited in a phased sequence to produce movements of the structure in the two coordinate directions. The damping apparatus is composed of inertial mass and a viscoelastic member which connects the mass to the structure to resiliently damp the stepping movements of the structure.
摘要:
An electrical assistance device for a bicycle includes an electrical machine, a drive roller, an actuatable positioner, and a controller. The electrical machine includes a support arm and a rotor shaft, which carries the drive roller via a free wheel. The support arm is mounted on the bicycle by a pivot shaft, which pivots between a drive position and a separated position. The actuatable positioner releasably holds the support arm in the separated position. The controller controls operation of the electrical machine and is able to cause the electrical machine to produce a motive torque in a direction toward a wheel of the bicycle driven in forward movement. The controller also is able to deliver an electrical pulse to the electrical machine to produce a reaction torque in a direction opposite to the motive torque to cause the support arm to pivot, causing actuation of the positioner.
摘要:
A driving device includes an electric motor including a stator and a rotor rotatable relative to the stator, and a gear train connected to the rotor. The stator includes a cylindrical housing and an endcap mounted to an end of the housing; The gear train includes a gear mechanism with at least one stage, which includes a ring gear, a sun gear, planetary gears and a carrier. The ring gear is directly engaged with the endcap, which limits the position of the planetary gears of the gear train in an axial direction of the gear train.
摘要:
The shock-absorber comprises: a cylinder containing a hydraulic working fluid; a piston slidably arranged in the cylinder so as to split the cylinder into two variable-volume working chambers, namely a first working chamber, or extension chamber, and a second working chamber, or compression chamber; an auxiliary conduit in fluid communication on one side with the first working chamber and on the other with the second working chamber; a train of permanent magnets slidably arranged in the auxiliary conduit so as to reciprocally move along the auxiliary conduit, dragged by the working fluid flowing between the first and second working chambers through the auxiliary conduit as a result of the reciprocating motion of the piston in the cylinder; and electric energy generating device for generating electric energy by exploiting the movement of the train of permanent magnets along the auxiliary conduit.
摘要:
A locking apparatus comprises a sliding member, and a first memory alloy wire configured to engage the sliding member to exert a first force to move the sliding member in a first sliding direction to a locked position when electrical energy is applied to the first memory alloy wire. The locking apparatus further comprises a second memory alloy wire configured to exert a second force to engage the sliding member to move the sliding member in a second sliding direction to an unlocked position when electrical energy is applied to the second memory alloy wire. The apparatus further comprises a position limiting structure. When the sliding member is moved to the locked position, the position limiting structure holds the sliding member at the locked position. When the sliding member is moved to the unlocked position, the position limiting structure holds the sliding member at the unlocked position.
摘要:
The shock-absorber comprises: a cylinder containing a hydraulic working fluid; a piston slidably arranged in the cylinder so as to split the cylinder into two variable-volume working chambers, namely a first working chamber, or extension chamber, and a second working chamber, or compression chamber; an auxiliary conduit in fluid communication on one side with the first working chamber and on the other with the second working chamber; a train of permanent magnets slidably arranged in the auxiliary conduit so as to reciprocally move along the auxiliary conduit, dragged by the working fluid flowing between the first and second working chambers through the auxiliary conduit as a result of the reciprocating motion of the piston in the cylinder; and electric energy generating device for generating electric energy by exploiting the movement of the train of permanent magnets along the auxiliary conduit.
摘要:
A device for efficient self-contained timely sequential vehicular inertial thrust drive is presented comprising two in opposing motion direction internal frequency modulated mechanical oscillators using the simultaneous and combined effort of straight line and rotational inertial reluctance of flywheels. The oscillator's mass motions are obtained with a motor-generators imbedded into large backrest flywheels reciprocally exerting pulsed drive actions and dynamic braking action onto rotors. The motor generators are controlled by a manually tunable electronic controller allowing the fine tuning of the mass motions for finding the highest thrust efficiency. The oscillator's frequency modulation is obtained with an internal reaction less angular mutual reciprocal torque pulse exertion by the motor between the large backrest flywheels against the fast spinning rotor. The internal cycle is recycling unused backrest flywheel energy back into the power supply allowing for an efficient propulsion cycle without energy loss.
摘要:
The present invention discloses systems and methods for electromagnetic spacecraft propulsion or thrust generation without the expulsion of reaction mass. The systems include capacitor assemblies with a switch-controlled conductive discharge path, a means of charging the capacitor assemblies, a means of generating magnetic fields using electromagnetic coils, and a means for periodically shaping the intensity, duration and polarity of magnetic fields from the coils. Thrust is generated through the interaction of the shaped magnetic fields and the segmented current in the conductive discharge path during capacitor discharge.
摘要:
The present invention concerns a system for coupling a driving machine with a driven machine comprising a driving machine disk comprising first reliefs, and a driven machine disk comprising second reliefs. The second reliefs are arranged relative to the first reliefs to enable the coupling system to form a first configuration allowing axial separation according to the axis of rotation of the two discs and in which the two disks are in contact, the first reliefs being angularly offset relative to the second reliefs, and a second configuration in which the second reliefs engage with the first reliefs and oppose the axial movement of the two disks relative to each other. The shift from the first to the second configuration is made by a rotation of the two disks relative to each other about the axis of rotation.