36results about How to "Reducing vibration and noise" patented technology

An electric power steering apparatus includes a speed reducing mechanism for decelerating the rotation of a rotatable shaft in an electric motor and a converting mechanism for converting the output rotation of the speed reducing mechanism into the axial movement of a steering shaft extending toward the right and left sides of a vehicle. The speed reducing mechanism includes an input pulley driven by the electric motor, an output pulley arranged with the steering shaft enclosed thereby, a belt for connecting the input pulley and the output pulley to each other, and a belt tension adjuster.

In a rolling element accommodating belt having a rolling element accommodating section for individually accommodating a plurality of balls at predetermined intervals while the plurality of balls are rolling and circulating in an infinite circulating passage of linear guide, the rolling element accommodating belt accommodates the balls in the rolling element accommodating section and aligns the balls in the direction of aligning balls in the infinite circulating passage. The rolling element accommodating section includes: a restraint accommodating section for restricting the accommodated balls in all directions; and a no-restraint accommodating section in which the accommodated balls are not restrained at least in one direction.

A rotary-type fluid machine includes a compression mechanism having piston mechanisms arranged one on top of the other and a drive mechanism having a drive shaft that is configured and arranged to drive the piston mechanisms. Each of the two piston mechanisms includes a cylinder member with a cylinder chamber, a piston member housed eccentrically in the cylinder chamber such that the cylinder chamber is partitioned into first and second compression chambers. A phase difference of 90 degrees in volume change is made between the cylinder chambers of the two piston mechanisms. A movable one of the cylinder and piston has a first surface facing one of the first cylinder chambers and a second surface facing one of the second cylinder chambers, with a surface area of the first surface being equal to a surface area of the second surface.

In a rolling element accommodating belt having a rolling element accommodating section for individually accommodating a plurality of balls at predetermined intervals while the plurality of balls are rolling and circulating in an infinite circulating passage of linear guide, the rolling element accommodating belt accommodates the balls in the rolling element accommodating section and aligns the balls in the direction of aligning balls in the infinite circulating passage. The rolling element accommodating section includes: a restraint accommodating section for restricting the accommodated balls in all directions; and a no-restraint accommodating section in which the accommodated balls are not restrained at least in one direction.

A water-lifting pump apparatus which is free of a discharge valve and a check valve, is low in cost, and is capable of reducing vibration and noise due to a waterfall after the end of water pumping operation. The water-lifting pump apparatus has a suction tank (10), a discharge tank (20), a pump (30) for pumping water in the suction tank (10) into the discharge tank (20), and a discharge piping (50) connected to a discharge side of the pump, an actuator (60) for actuating the pump (50), a reverse flow preventing mechanism (80) for preventing a reverse flow of water pumped into the discharge tank (20) toward the discharge piping (50), and a back flow rate control (90) for controlling the flow rate of a waterfall falling from the discharge piping (50) into the suction tank (10) when pumping operation is finished.

An image reading device, and more particularly an image reading device having a cooler capable of preventing introduction of impurities and reducing vibration and noise. The image reading device includes a body having a reading unit, and a cooler disposed in the body cooling the reading unit. The cooler includes a housing, a cooling unit disposed in the body and moving air into the body, a filter member disposed apart from the cooling unit and removing dust contained in the air, and a damper member having one side supported by the filter member and the other side supported by the cooling unit.

A bar feeder includes a feeder tube mounted on a machine base, a transmission mechanism, a driving mechanism having a rotary shaft, a projecting rod connected to the driving mechanism and rotatable with the rotary shaft to engage or disengage from the transmission mechanism, a pushing rod, and a driven mechanism rotatable with the rotary shaft to move the pushing rod into engagement or away from the transmission mechanism. When the pushing rod and the transmission mechanism are coupled together, the pushing rod is movable along the feeder tube, and the projecting rod is disengaged from the transmission mechanism and moved away from the feeder tube. When the pushing rod and the transmission mechanism are disconnected, the pushing rod is not movable along the feeder tube, and the projecting rod is coupled to the transmission mechanism and movable along the feeder tube.