83results about How to "Reduce operating noise" patented technology

An air purifier includes a main body defining an air passage therein to allow sucked air to pass therethrough prior to being discharged, and a first filter installed in the main body to be switched between a closed state and an open state. The first filter removes contaminants from the sucked air in the closed state, and allows the sucked air to pass through the air passage in the open state. The air purifier may include a main body to suck and discharge air, with a bypass passage formed in the main body so that the bypass passage is opened or closed by a door, and a first filter installed in the main body. The sucked air passes through the first filter prior to being discharged when the door is closed, and passes through the bypass passage prior to being discharged when the door is opened.

A lower type motor-driven column apparatus includes a tilt unit having a column tube and a tilt link forming a plurality of hinge fixed points in order to tilt up/down a steering wheel by vertical motion generated with rotation due to straight motion of a tilt rod through a tilt motor, a telescopic unit implementing telescopic movement pushing or pulling the column tube by means of straight motion of a tele-rod through a tele-motor, and a shock-absorbing member absorbing and attenuating a shock stroke of the column tube, ahead of the tilt unit and the telescopic unit, in which the operation mechanism of the tilt unit and the operation mechanism of the telescopic unit are individually implemented, such that the MDPS can be easily used for middle-sized and large-sized vehicles which are difficult to use the upper type and it is possible to save fuel of the middle-sized and large-sized vehicles.

The invention discloses a multi-functional cabinet. The multi-functional cabinet comprises a cabinet body and a folding bed which can be accommodated in the cabinet. The folding bed comprises a tail board, a first pinboard, a second pinboard, a third pinboard and a head board, wherein the tail board, the first pinboard, the second pinboard, the third pinboard and the head board are hinged in sequence. A tail part bed leg is arranged on the hinged portion between the tail board and the first pinboard, a middle part bed leg is arranged on the hinged portion between first pinboard and the second pinboard, and a head part bed leg is arranged on the hinged portion between the second pinboard and the third pinboard. A sliding structure is arranged between the cabinet body and the folding bed for facilitating pulling out of the folding bed from the cabinet or pushing the folding bed into the cabinet, and a folding-aiding structure is also arranged between the cabinet body and the folding bed for facilitating the folding operation of the folding bed. The arrangement of the sliding structure and the folding-aiding structure between the cabinet body and the folding bed enhances the convenience of the use of the folding bed, the multi-functional cabinet has a storage function, seats or beds can also be assembled as required, and the multi-functional cabinet thus has preferably marketing and application prospects.

A structure of a mounting bracket that connects a vehicle body and a transmission is provided. The structure includes an outer pipe having an insulator disposed therein and the insulator includes a plurality of stoppers having curved portions and a protrusion formed at an inner top portion of an aperture of the insulator and directed downwards. An inner pipe is coupled in the aperture of the insulator and a core is press-fitted into the inner pipe. The inner pipe and the core abut each other by the protrusion. Accordingly, vehicle dynamics control and quasi-static motion performance are improved, and operational noise, vibration, and noise attributable to vibration are reduced. Since the outer pipe and the inner pipe are made of plastic, the weight of the structure is decreased. Further, a decrease in the gap between stoppers is achieved without a swaging process.

A cooling device includes: a cooling fan; a shroud provided at an outer circumferential side of the cooling fan; an inner circumferential wall provided on the shroud and adjacent to the outer circumference of the cooling fan; and an outer circumferential wall provided to surround the inner circumferential wall. An air-flow-direction downstream side end of the outer circumferential wall is positioned at a further downstream position in an air flow direction than an air-flow-direction downstream side end of the inner circumferential wall. An air-flow-direction downstream side end of the cooling fan is positioned at a further downstream position than the air-flow-direction downstream side end of the inner circumferential wall. A ratio between a length of the outer circumferential wall and a length of the inner circumferential wall in the air flow direction is 1.07 or more and 1.81 or less, and a width between the outer circumferential wall and the inner circumferential wall is 15 mm or more and 55 mm or less.

An intake air amount control system for an internal combustion engine, which controls respective amounts of intake air drawn into four cylinders #1 to #4, independently of each other, by variable inter-intake cam phase mechanisms 80, identifies intake air amount variation coefficients ¦#i, based on a model [equation (43)] defining a relationship between an estimated value Gth_est of a TH passing intake air amount and a plurality of simulation values Gcyl_OS#i, such that the estimated value Gth_est becomes equal to the TH passing intake air amount, calculates a target inter-intake cam phase ¸ssi#i_cmd, on a cylinder-by-cylinder basis, according to the identified intake air amount variation coefficients ¦#i (step 81), and calculates control input DUTY_ssi#2 to #4 to the variable inter-intake cam phase mechanisms 80 according to the target inter-intake cam phases ¸ssi#i_cmd (step 75).

Disclosed is a rotary piston engine comprising a rotor which is rotatably mounted in a housing and in which several pistons can be moved in a radial direction between an outer and an inner dead center. Each piston is provided with a piston rod which sits on a transversal shaft that is fastened to a sliding piece at each end, said sliding piece being movable within radial grooves in the rotor, on both sides of the piston. The external side of the sliding pieces which faces away from the piston is fitted with a pin that is accommodated in a star-shaped continuous guiding groove which is fixed to the housing. The guiding groove extends around an axis of rotation of the rotor and causes the pistons to move in a radial direction between the inner and outer dead centers.

The invention provides a full-electric controlled container lifting machine with a centralized drive axle. The full-electric controlled container lifting machine comprises a storage battery, a controller connected with the storage battery, a motor driven by the electric power from the storage battery through the controller, and the centralized drive axle driven by the motor to execute the driving function of the whole machine. According to the full-electric controlled container lifting machine, the storage battery and the motor are adopted to provide power for the operation of the container lifting machine. Environmental pollution can be minimized to the maximum, and operation noise is reduced.

The invention mainly relates to a linkage control mechanism for a machine head triangle. The linkage control mechanism comprises a fixing plate, wherein a double-output-shaft motor and a plurality oftriangular seats are arranged on the fixing plate; a first needle selection triangle, a second needle selection triangle, a needle clearing triangle and a rubber band triangle are movably arranged onthe corresponding triangular seats; the double-output-shaft motor is capable of controlling the first needle selection triangle, the second needle selection triangle, the needle clearing triangle andthe rubber band triangle to move; a first control rack is installed at one end of the double-output-shaft motor in a driving mode; a first control rail is arranged in the first control rack and used for controlling the first needle selection triangle and the second needle selection triangle to move; a second control rack is installed at the other end of the double-output-shaft motor in a driving mode; a second control rail is arranged at one end of the second control rack and used for controlling the needle clearing triangle to move; the other end of the second control rack is connected with acontrol rod, and the control rod is used for controlling the rubber band triangle to move. The mechanism is ingenious in structural design, convenient to operate, stable and flexible to control, longin service life and low in operation noise, and economic benefits of enterprises are greatly improved.

A hair care or hair styling device 1 comprises two arms 5, 5.1 arranged articulated to one another and movable relative to one another in the manner of tongs 5, 5.1, with the top sides of each of said arms, which face one another, each having a complementary styling surface 9, 9.1 for forming a hair styling space 10 between the styling surfaces 9, 9.1. By virtue of the articulated arrangement of the arms 5, 5.1 the hair styling space 10 can be opened and closed. Each of the arms 5, 5.1 is equipped with a flow passage 11, 11.1 for conducting a flow of hot air, wherein the component 8, 8.1 that forms the styling surface 9, 9.1 of each arm 5, 5.1 is arranged such that a flow of hot air conducted through the flow passage 11, 11.1 of said arm 5, 5.1 flows along the back side of the component 8, 8.1 that forms the styling surface 9, 9.1 for the purpose of heating said styling surface 9, 9.1. In a heat-conducting arrangement, at least one self-regulating heating element having a positive temperature coefficient-a PTC heating element 13, 13.1-is connected as an additional heating device to the component 8, 8.1 that forms the styling surface 9, 9.1 of at least one arm 5, 5.1, for the purpose of supplying heat to the styling surfaces 9, 9.1.

The invention relates to an inlet air filter device of a gas turbine. The inlet air filter device comprises a filter, an anti-rain hood, a high-precision filter element, a back-blowing nozzle, a compressed air pipe, an electromagnetic valve, inspection and repair platforms, an air channel and a silencer, wherein the anti-rain hood is arranged at the inlet of the filter; the high-precision filter element is arranged in the filter; the back-blowing nozzle is arranged in the filter outlet direction of the high-precision filter element and is connected with the compressed air pipe; the electromagnetic valve is arranged on the compressed air pipe; the inspection and repair platforms are arranged at two sides of the high-precision filter element in the filter; the outlet of the filter is connected with the silencer through the air channel; the high-precision filter element is in a double-layer structure, the first layer is an E class filtering layer and the second layer is an anti-moisture filtering layer. The inlet air filter device of the gas turbine has the advantages of efficient filtering, long service life and low operation risk, and has a good promotional value.

Disclosed are a clutch operating system and a driving method of a clutch operating system. The system may include a clutch master cylinder connected to a clutch pedal and generating hydraulic pressure by operation of the clutch pedal, a piston provided in the clutch master cylinder and reciprocally moving according to the operation of the clutch pedal, and an integrated sensor detecting a stroke of the piston, selectively supplying power to a starting motor according to the stroke of the piston, and providing the stroke of the piston to an ECU (electronic control unit) to control a transmission and an EPB (electronic parking brake).

The invention discloses a high-strength plastic chain. The high-strength plastic chain is characterized in that a chain body (1) is formed by connecting a plurality of circular chain links (11) in series, and each circular chain link (11) comprises an annular metal wire (3) located in the center of the circular chain link (11) and a plastic layer (2) for wrapping the periphery of the annular metal wire (3); the diameter of the circular chain links (11) ranges from 3 cm to 8 cm; the annular metal wires (3) are steel wires, iron wires or copper wires; the circular chain links (11) are in closed ring shape; the radius of the cross sections of the circular chain links (11) is 2 mm, and the radius of the cross sections of the metal wires (3) is 0.5 mm. The high-strength plastic chain is low in operation noise, high in intensity and capable of bearing large tensile force.

The invention concerns a proceeding for the pipe flushing of a hydraulic system (3) internally by throughput of said hydraulic system (3) with fluid (4) in a flow of at least Re 2300 Reynolds. According to the invention, motor (5), pump (6) included in utilized plant (2) and the desired purification degree are regulated by a control unit (1) by the feedback of motor speed, oil flow, oil temperature, and contamination degree via particle counter (23). In that connection, there is provided automatic purification of the oil (4) or of another fluid, which is utilized in a so-called closed loop system with corrections automatically made by the control unit (1) after predetermined desired final result of the purification degree before approved result report can be delivered. The invention also concerns a plant (2) for accomplishing a said proceeding.

A system for propelling a vehicle along an elevated, pneumatic power tube carried by exterior support structure above ground. First and second angles define tracks for the vehicle and extend parallel to the power tube. Undercarriages secured to the vehicle including vehicle support and guidance wheels which are rotatable about axes inclined relative to legs of the angle tracks have a periphery that engages the legs of the angle tracks so that the weight of the vehicle is supported by the tracks and the support structure only. A pneumatic propulsion unit is movably disposed inside the power tube and is guided along rails on the inside of the power tube. A magnetic coupler having first and second cooperating magnetic elements is attached to the vehicle and the propulsion unit in operative alignment with each other. A portion of the power tube located between the magnetic elements is constructed of a non-magnetic and non-conductive material and extends over the length of the power tube. The propulsion unit has a thrust carriage with a thrust valve that forms a collapsible, frusto-conically shaped wall formed by a multiplicity of overlapping, angularly inclined blades that are concentrically disposed in the power tube. An actuator is coupled to the blades for selectively increasing an angle of the blades until free ends thereof contact an interior surface of the power tube, to thereby prevent the flow of air through the tube past the wall, and for retracting the blades so that the free ends thereof are spaced apart from the interior surface of the power tube, the valve generating a force acting in the longitudinal direction of the power tube when the free ends of the valve blades engage the interior surface.

The invention relates to the technical field of environmental sanitation mechanical equipment, in particular to a road separation zone pruning machine which comprises a carrying vehicle and pruning mechanisms. The pruning mechanisms are arranged on the inner side of a left barrier and the inner side of a right barrier; a descending air cylinder is further connected with the lower side of a shaft sleeve of a traverse air cylinder; a cutting motor is connected with a telescopic rod end of the descending air cylinder, a cutting disc is connected with a driving shaft end of the cutting motor, andcutting teeth are arranged at the bottom of the cutting disc; two groups of side moving pulleys are positioned at two ends of the inner side of each barrier; vertical cutting knife groups are adjacentto the side moving pulleys at the front ends of the barriers; conveying caterpillars are vertically arranged on the barriers and are positioned at the rears of the cutting knife groups. The road separation zone pruning machine has the advantages that the road separation zone pruning machine is provided with the left barrier and the right barrier, accordingly, noise transmission can be prevented to a great extent, and equipment operation noise can be lowered; the top surfaces and the side surfaces of shrub branches can be simultaneously cut, and branches generated in cutting procedures can beguided into separation zones and can be conveniently decayed to form organic fertilizers.

The invention mainly relates to a main drive mechanism used for a flat knitting machine, comprising a left base and a right base, wherein a slide rail component is arranged between the left base and the right base, a headpiece part is arranged in matched on the slide rail component and comprises a front headpiece component and a rear headpiece component, a motor seat is arranged at the right sideof the right base, a main driving device is arranged on the motor seat, synchronous belt drive devices arranged in parallel are arranged at the rear sides of the left base and the right base, the maindriving device independently drive the rear headpiece component to move in a reciprocating way by the synchronous belt drive device, a fixing adjusting device is arranged on the main driving device and is used for fixing the main driving device on the motor seat, the tension of the synchronous belt drive device on the main driving device can be adjusted by the fixing adjusting device, and the front headpiece component is connected with the rear headpiece component by a connecting device, so as to realize synchronous reciprocating movement of the front and rear headpiece components. The designof the main drive mechanism is simple in structure, steady in driving, long in service life, low in operation noise and increased in economic benefit.

A ball screw includes a load path and a non-load path defined between the screw shaft and the screw nut with the two ends of the non-load path respectively connected to the load path and a reflow channel of the return tube. The ball screw defines an imaginary horizontal plane and an imaginary sloping surface that are intersected with each other at the center axis of the screw shaft. The imaginary horizontal plane passes through the non-load path. The imaginary sloping surface passes through the junction between the non-load path and the load path. The imaginary sloping surface defines a negative included angle within 1˜3 degrees with respect to the imaginary horizontal plane to reduce the impact force rendered by each rolling member to the return tube, enhancing operational smoothness and reducing operational noise.

An optical apparatus includes an optical system in which two zoom lens units perform zooming in different ranges in accordance with a zoom position, and a mechanism for driving the two zoom lens units by a single driving portion. An urging force for urging moving members toward an interlocking movement member that is moved along the optical axis by a feed screw is cut off by regulating portions.