摘要:
A fluid filled vibration-damping device includes an elastic body disposed between a first mounting member and a second mounting member and partially defines a fluid chamber having a non-compressible fluid sealed therein, and exhibits vibration damping action on the basis of flow action of the non-compressible fluid created within the fluid chamber during vibration input. At least one mounting member from among the first and second mounting members is formed independently of the elastic body and is disposed in abutment with the elastic body in an initial load acting direction, while making the mounting member displaceable away from the rubber elastic body in a opposite direction from the initial load acting direction. A rebound stop mechanism for limiting displacement of the mounting member away from the rubber elastic body in a cushion-wise fashion is disposed between the first and second mounting members.
摘要:
A vibration damping device having a stopper structure includes: a rubber elastic body of generally frustoconical configuration overall; a first mounting member formed independently of the rubber elastic body, and directly or indirectly superimposed on the rubber elastic body in an external load input direction; and a second mounting member including a cylindrical portion that is bonded to a large diameter side outer circumferential surface of the rubber elastic body. A first and second abutting portions of the first and second mounting members are situated to be opposed to each other in a rebound direction with a given distance interposed therebetween, and a stop rubber is disposed between the first and second abutting portions so that the first and second abutting portions come into abutting contact with each other in a cushion-wise fashion, via the stop rubber to thereby provide a stopper structure.
摘要:
A vibration controller includes a data map storage, a detector, a determiner, a signal generator, and an actuator. The data map storage stores amplitude and/or phase data with respect to torque values of a vehicle engine as a data map in advance. The detector detects actual torque values of the vehicle engine. The determiner determines one of the amplitude and/or phase data with respect to one of the actual torque values based on the data map. The signal generator generates a control signal based on cyclic pulsating signals emitted from the vehicle engine, and updates the amplitude and/or phase of the control signal based on the one of the determined amplitude and/or phase data. The actuator actuates an electromagnetic actuator of an active vibration insulator based on the updated control signal, whereby inhibiting vibrations of the vehicle engine from transmitting by means of vibrating forces exerted by the electromagnetic actuator.
摘要:
A vibration control system for electric tilt steering including a lower stationary and upper moveable column through which is rotatably passed a steering shaft having a steering wheel attached to an distal end projecting into a cabin of a vehicle, the moveable column being linked in vertically tiltable fashion to the end of the stationary column and the stationary column being fixed to a vehicle body, with tilting movement of the moveable column being driven by an electric motor to adjust a movable column vertical position. The system includes a control signal generating device for detecting control signal having control frequency and phase for attenuating vibration input to the steering based on a signal synchronized with operation of a vehicle engine, and a drive controlling device for controlling the electric motor drive based on the control signal, to give oscillation to the steering for attenuating vibration input to the steering.
摘要:
A fluid-filled vibration damping device wherein two mutually spaced-apart mounting members are connected by an elastic body, which cooperate with an elastic wall member to partially define a pressure-receiving chamber, and a flexible diaphragm partially defines an equilibrium chamber on one side and a working air chamber on the other side. These chambers are filled with the non-compressible fluid and held in fluid communication with each other through the orifice passage. A negative pressure-regulating device applies different negative pressure to the working air chamber depending upon frequencies of vibration to be damped, so that a spring constant of the elastic wall member is changed corresponding to the vibration to be damped, thereby controlling a damping characteristics of the damping device.
摘要:
An oscillating force generator is disclosed, wherein a yoke member has an annular groove in which a coil is disposed so as to be energized by an electric current for generating magnetic circuit around the coil, and for magnetizing an inner and outer circumferential wall portions of the yoke member as respective opposite magnetic poles at their open end portions. An oscillating member made of a magnetic material is disposed opposite to the one end face of the yoke member in an axial direction of the yoke member with a predetermined axial distance therebetween. The oscillating member has an inner and an outer circumferential portion which are located nearest to the open end portions of the inner and outer circumferential wall portions of the yoke member, respectively. The coil is energized for generating magnetic force acting on the oscillating member so that an oscillating force is generated between the oscillating member and the yoke member in the axial direction thereof. At least one of the open end portions of the inner and outer circumferential wall portions of the yoke member being directly opposed in the axial direction to the inner and/or outer circumferential portions of the oscillating member, while at least the other open end portion of the inner and outer circumferential wall portions having a first circumferential edge portion which is located nearest to a second circumferential edge portion in the inner and/or outer circumferential portions of the oscillating member. The first and second edge portions being offset from each other in a direction perpendicular to the axial direction, while being opposed to each other in a direction inclined with respect to the axial direction.
摘要:
Fluid-filled vibration damping device having a primary fluid chamber partially defined by an elastic body elastically connecting two spaced-apart mounting members and located on one of opposite sides of a partition structure having an orifice passage, an auxiliary fluid chamber partially defined by a flexible diaphragm and located on the other side of the partition structure, and a movable rubber plate partially defining the primary fluid chamber and held by the partition structure, wherein the partition structure comprises a support member including a cylindrical engaging portion, and at least one fluid-tightly fitted component superposed on the support member and each including a cylindrical engagement portion fitted in the engaging portion of the support member, and the movable rubber plate is bonded at its peripheral portion to the inner circumferential surface of the cylindrical engaging portion of the support member which is covered by a sealing rubber layer, and wherein the cylindrical engaging portion of the support member is radially inwardly drawn onto the cylindrical engagement portion of each fluid-tightly fitted component via the sealing rubber layer.
摘要:
A vibration damper including (a) an attaching member fixed to a subject member whose vibrations are damped by the vibration damping device, (b) a mass member displaceable relative to the attaching member in a vibration input direction, (c) an elastic connector elastically connecting the mass member to the attaching member and cooperating with the mass member to at least partially define a working chamber, and (d) a structure for defining a fluid passage communicating with the working chamber for changing a pressure of a fluid in the working chamber to thereby cause the mass member to be displaced relative to the attaching member in the vibration input direction.
摘要:
A fluid-filled elastic mount having a first and a second support structure, an elastic body interposed between the two support structures, a partition member cooperating with the elastic body to define a pressure-receiving chamber, a flexible diagraphm cooperating with the partition member to define an equilibrium chamber, and a resonance member fixedly disposed in the pressure-receiving chamber and including a flexible film which at least partially defines an air chamber. The elastic mount includes a pressure control device for changing the pressure in the air chamber, thus changing the vibration damping or isolating characteristics for the elastic mount.