1462results about How to "Eliminate vibration" patented technology

A rotary cutting tool that includes an elongated tool body, rotatable along a longitudinal axis of rotation is disclosed. It has a fluted cutting end on one end and a shank end on the opposite end of the tool body. The fluted cutting end includes a nose, a periphery and an end surface that extends from the nose to the periphery. A plurality of axial flutes extends from the end surface to the fluted cutting end and combines with a plurality of cutting edges. The cutting edges are unequally spaced along the circumference of the end surface lying in a plane perpendicular to the longitudinal axis of rotation. In addition, all cutting edges are of a different helix from one another and the cutting edge geometries vary from one another to create a different sound pattern. This reduces resonant harmonic vibrations.

A sliding rail assembly auto locking structure for drawer is disclosed comprised of a holder base, a swivel hook, a slide, two return springs, an actuating block. When an arched block of the swivel hook is approaching a recess in the holder base for positioning, the arched block does not fall to the recess directly, and at this time, oblique guide grooves of the swivel hook are moved over associating guide blocks of the holder base to guide the arched block into the recess slowly and smoothly, and therefore the inner sliding rail of the sliding rail assembly is moved with the drawer smoothly without vibration.

A synchronous rectification circuit for a power converter includes a power switch coupled to a transformer and an output capacitor and a switching control circuit configured to provide a control signal to the power switch in response to a first state and a second state of the voltage across the power switch. In the switching control circuit, the second state is determined prior to the first state is determined. In an embodiment, the switching control circuit includes a voltage comparing unit configured to act in response to the first and second inputs. The voltage comparing unit is also configured to output a logic signal according to the voltage difference between the sensed voltage drop across the power switch and a reference threshold voltage. A logic processing circuit is coupled to the voltage comparing unit and configured to provide the first state and the second state of the voltage across the power switch.

Emergency situation detection apparatus comprising: a stress input unit for receiving body stress information from a subject, a physical input unit for receiving body physical reaction data from said subject, a comparator unit, associated with said stress input unit and said physical input unit, for comparing stress level information and physical reaction data, to detect substantially simultaneous stress level change and a physical reaction in said subject, said apparatus being operable to threshold said simultaneous detection to infer the presence of an emergency situation and to enter an alarm state.

The addition of DMD illumination modulator(s) 702 in series with projection SLM(s) 706/709 to produce high-performance projection displays with improved optical efficiency, reliability, and lower maintenance requirements. This approach eliminates the vibration, audible noise, and safety problems associated with high speed rotating color filter wheels 203 commonly used in SLM projectors and controls the light applied to individual areas of the projection SLM(s).

A car control apparatus comprising a wheel sensor 13, wheel torque calculating means 23 for calculating wheel torque from the wheel speed, drive force detecting means 12 for detecting drive force generated by an electric motor 3, car body drive force calculating means 24 for calculating car body drive force from the above drive force and wheel torque, car body drive force fluctuating component extracting means 25 for extracting multiple frequency band fluctuating components of the car body drive force, and drive or braking force control unit 22 for controlling the running state of a car, wherein

drive or braking force to be applied to each wheel is obtained from main drive force, slip ratio control drive force and tire disturbance compensation drive force calculated based on the extracted fluctuating components of the car body drive force and supplied to a motor controller 11 to drive or brake the drive wheel 2 and apply micro-vibration to the tire in order to suppress micro-vibration generated between the tire and the road surface, thereby making it possible to improve the road holding properties of the tire and the driving stability of the car by compensating for disturbance applied to the tire.

A support structure for piezoelectric elements in a marine seismic cable is provided. The support structure comprises upper and lower cylindrical halves, each with channels formed therein. Two axial channels are adapted to retain three piezoelectric elements each. A third axial channel, positioned between the sensor element channels, is adapted to retain a flexible circuit. Transverse channels between the sensor element channels and the circuit channels accommodate extension from the flexible circuit. The piezoelectric elements are mounted within their respective channels with a resilient pad with adhesive on both sides. The piezoelectric elements are graded so that any group of three piezoelectric elements exhibits approximately the same sensitivity as any of the other three groups of piezoelectric elements on the support structure.

A cord material suitable for use in lined textile structures with a gliding component includes a plurality of uniform strands, and a deviant strand. The deviant strand is different from the uniform strands in some characteristic affecting aerodynamic or hydrodynamic properties of the cord, such as size or surface properties. Each uniform strand can have a substantially equal cross section area, while the deviant strand has a cross section area at least five times greater than one of the uniform strands. The strands can be braided or woven together. A major benefit of the material can be that vibration induced drag is significantly reduced or eliminated in lines made with the material. Another advantage is that lines made from the material can have more consistent, predictable line drag, which can improve the quality of handling.

A thrust bearing 11 for use with a shaft 13 having a collar 15 mounted the shaft 13 and rotatable therewith has a base ring 17, a series of shoes 19 positioned on the base ring 17, and a compressible resilient spacing member 29 positioned between the base ring 17 and a housing 31 for the thrust bearing 11. The spacing member 29 supports the thrust bearing 11 when the shaft 13 is rotating during no-load operating conditions, as well as dampens the forces placed on the thrust bearing 11 by the shaft 13 when the shaft 13 is rotating during no-load conditions. The spacing member 29 is sufficiently stiff that it supports the thrust bearing 11 when the shaft 13 is rotating under no-load conditions, but is sufficiently compressible to be compressed to the extent that the gap 33 between the base ring 17 and the housing 31 is eliminated due to the forces placed on the thrust bearing 11 by the shaft 13 bringing the base ring 17 into contact with the housing 31 during normal load operating conditions.

An inspection system using a scanning electron microscope includes a scanning electron microscope chamber inspecting an object to be inspected by using an electron beam and maintaining a vacuum condition, a stage positioned below the scanning electron microscope chamber to be separated therefrom and mounted with the object to be inspected, and a transverse guide transferring the scanning electron microscope chamber on the stage. Atmospheric conditions are maintained between the scanning electron microscope chamber and the object to be inspected. Accordingly, object to be inspected a large size of an object to be inspected may be inspected without damage to the object to be inspected such that a cost reduction and a yield improvement may be realized.

The invention discloses a double-station numerical control machining center which comprises a main machine tool component and an upper discharging component, wherein the upper discharging component comprises two material storing shelf components, two feeding mechanisms, two discharging mechanisms and two material clamping mechanisms symmetrically mounted on a mounting frame at the left side and the right side for forming the material storing, feeding, clamping and discharging function; a structure on a pedestal component is used for adjusting the distance of the mounting frame and used for offering the power output for feeding and discharging operation; the main machine tool component can be driven by the motor lead screw driving mechanism for moving in X axis direction, two Y axis components are mounted on the X axis mobile pedestal and driven by the motor lead screw driving mechanism for moving in Y axis direction; two Z axis components are respectively fixed at the ends of two Y axis components, and rotating shaft components are mounted on the Z axis moving plate; the AB rotating shaft components are connected with the an electric main shaft in a driving mode, and the electric main shaft is four-end electric main shaft; four cutters are arranged on each of two four-end electric main shaft, and eight different cutters are used for processing the wood.

A dual, counter-rotating, coaxial rotor system provides individual control of an upper rotor system and a lower rotor system. The lower rotor control system and the upper rotor control system provide six controls or “knobs” to minimize or theoretically eliminate airframe vibration. In a dual, counter-rotating, coaxial rotor system, application of a HHC system to the two rotor systems individually but located on the common axis, will yield essentially complete vibration reduction because the 6 controls will suppress the 6 loads.

A main shaft includes a plurality of elastic engagement pieces arrayed along an outer perimeter of an attachment hole. During and after assembly, the elastic engagement pieces elastically abut at least an outer surface of a tapered shank in a tool holder and deform slightly in a radial direction. The elastic engagement pieces provide uniform engagement force between the main shaft and the tool holder over a broad surface area. An elastic flange provides additional elastic engagement and easy separation from the main shaft. Together, the elastic engagement pieces and elastic flange reliably engage and securely attach the main shaft to the tool holder while aiding disengagement.

An irregular rock sample high-pressure permeation device with an adjustable flow direction and a test method thereof are provided, wherein two blocking mechanisms I and two blocking mechanisms II are arranged inside a cylinder body; partitioning plates are respectively arranged on both sides of each of the blocking mechanisms I; water blocking plates are respectively arranged at both sides of each of the blocking mechanisms I; one end of each of the water blocking plates is connected to the sidewall of each of the partitioning plates, and the other end of each of the water blocking plates is connected to an internal portion of the cylinder body; a water injection pipe is disposed between the water blocking plates on a same side. The present invention combines flexible film amorphous close fit properties and easy charging and discharging of free gas.

A connector including an inner housing member for housing terminal fittings and an outer member for receiving the inner housing member. The inner housing member comprises upper and lower inner members. After terminal fittings have been attached to the upper and lower inner members, these inner members are joined to one another to form the inner housing member. An angular-tubular shaped housing chamber is provided at the posterior of an outer member for housing the inner housing member. The inner housing member is pushed into the housing chamber of the outer member to complete the assembly of the connector. The connector also includes a latch that prevents the inner and outer members from being easily released, and in which rattling or vibration of the upper and lower inner members is prevented.

A sample cooling apparatus capable of cooling and holding samples or wafers at a cryogenic temperature with no vibration or drift with respect to a measurement reference surface is disclosed. In the sample cooling apparatus, a sample holder is arranged in a vacuum vessel mounted on a housing having a table for forming a measurement reference surface to be supported by a thermal insulator. A frame is disposed within the housing to be supported by a first buffer. A refrigerating machine is disposed in the frame to be supported by a second buffer and has a head directed to the vacuum vessel. The cooling head of the refrigerating machine is connected to the sample holder by way of a flexible thermal conduction member.

The invention relates to a parallel vibration isolation buffer based on the magnetic rheomorphism technology, which is composed of a magnetic rheologic elastic body buffer and a magnetic rheologic liquid buffer, which are connected in parallel. The magnetic rheologic elastic body buffer is composed of a connecting rod and a magnetic rheologic elastic body shearing ring; the magnetic rheologic elastic body shearing ring is composed of a magnetic rheologic elastic body, a coil winding and a field core; each of the right side and the left side is provided with a group of coil winding and a group of field core; the field core is composed of two hemicycle iron cores and the magnetic rheologic elastic body is respectively held between the two hemicycle iron cores of each set to form the magnetic rheologic elastic body shearing ring, the two sets of the magnetic rheologic elastic body shearing rings are connected organically by the connecting rod; the magnetic rheologic liquid buffer is arranged between the two sets of magnetic rheologic elastic body shearing rings and is fixed between the upper connecting rod and the lower connecting rod, and is connected with the two sets of magnetic rheologic elastic body shearing rings in parallel structurally. The device can control the structural rigidity and the damp, reduce the impact and vibration on the system from the outside and has the advantages of good controllability, wide dynamic range, high response speed, low power consumption and so on; furthermore the device has strong environmental conformability.

The invention relates to a speed-adjusting-type permanent-magnet drive system, comprising a conductor rotor (a first rotor), a magnetic rotor (a second rotor) component and a lead screw regulator, wherein the conductor rotor (the first rotor) is arranged on an input shaft; the magnetic rotor (the second rotor) is arranged on an output shaft; the conductor rotor comprises a disk-shaped steel frame and a copper conducting ring; the surface of a steel plate is provided with the copper conducting ring; the opposite surfaces of a permanent-magnet rotor and the conductor rotor are embedded with permanent magnets; the gap of the opposite surfaces of the conductor rotor and the permanent-magnet rotor can adjust an axial air clearance; and the conductor rotor and the permanent-magnet rotor are coupled by the magnetic force. When the conductor rotor rotates, the permanent-magnet rotor also rotates along the same direction with the conductor rotor due to the coupling action of the magnetic force; the conductor rotor (the first rotor) is fixedly connected with the input shaft; the permanent-magnet rotor (the second rotor) is connected with the output shaft by a shaft section; the regulator is arranged on the shaft section; and the air clearance between the disk surfaces of the two rotors can be adjusted by the regulator, thus changing the torque and the rotating speed and achieving the purpose of speed adjustment.

A belt tensioner for a mechanical power transmission such as in a motor vehicle engine. The belt tensioner includes a wheel for bearing against the belt and a resilient return device for ensuring that the wheel bears against the belt with pre-stress. The wheel further includes a covering of vibration absorbing material. The invention is particularly applicable to mechanical engineering and specifically to the car industry.