148results about How to "Reduce crash noise" patented technology

The invention discloses an automobile electric telescopic pedal with a double-station support function. The automobile electric telescopic pedal comprises a pedal body, a first pedal mounting bracket assembly and a positive and reverse rotation motor, wherein the first pedal mounting bracket assembly comprises a first motor mounting frame, a first main driving plate, a first auxiliary connecting plate and a first telescopic bracket, the outer end of the first telescopic bracket is fixedly connected with the pedal body in a support fit way, and the upper ends and the lower ends of the first main driving plate and the first auxiliary connecting plate are respectively hinged and fit with the inner ends of the first motor mounting frame and the first telescopic bracket to form a plane four-connecting rod structure; when the first telescopic bracket is controlled in the extending station state, a limiting convex block of the first main driving plate and a limiting convex block of the first auxiliary connecting plate are mutually abutted, jacked, limited and fit; when the first telescopic bracket is controlled in the retraction station state, the outer contour surface of the first main driving plate is provided with an outer convex part of the first main driving plate, and the outer convex part of the first main driving plate and the upper end surface of the first telescopic bracket are mutually limited and jacked. The automobile electric telescopic pedal has the advantages that the structure design is reasonable, the service life of the motor is prolonged, and the support stability of the pedal is guaranteed.

This door handle device is provided with: a handle base; an introduction opening that is opened in a door handle and that supports the handle base; an operation handle that is connected to the handle base; and a gasket that is disposed between the handle base and the operation handle. A handle stopper, of which one end passes through the introduction aperture and is borne by the handle base, and of which the other end contacts the operation handle, is integrally provided to the gasket.

The invention relates to a centrifugal force pendulum (1, 1a) having a pendulum flange (3, 3a) which is arranged so as to be rotatable about an axis of rotation (2) and having a plurality of pendulum masses (4, 4a) which, for rotational-speed-adaptive absorption of rotary oscillations introduced into the pendulum flange (3, 3a), are held so as to be pitovable with a centre of mass (M) about at least one pendulum point (P) with a predefined pendulum radius (r) and a predefined swing angle (a). In order, at low rotational speeds of the pendulum flange (3, 3a), to reduce a generation of noise caused by pendulum masses arranged with the centre of masses thereof above the axis of rotation being accelerated in the direction of the axis of rotation owing to gravitational force, the predefined swing angle (a) is changed by a pendulum angle (ss) with a pendulum radius (rp) which is reduced in relation to the pendulum radius (r).

A variable capacity rotary compressor capable of reducing collision noise of a vane with a roller. The variable capacity rotary compressor includes a vane controller controlling the operation of a vane in order to vary compression capacity. The vane controller includes a control valve that switches a fluid channel so as to selectively apply discharge pressure and intake pressure to the vane guide slot, a connection channel that connects the control valve with the vane guide slot, a high-pressure channel that connects the control valve with a discharge side of the compressor, and a low-pressure channel that connects the control valve with an intake side of the compressor, and a throttle section that reduces the fluid channel of at least one of the high-pressure channel and the connection channel in order to reduce an initial discharge pressure applied to the vane guide slot.

The present invention is directed to provide a pneumatic tire capable of effectively preventing large collision noise due to simultaneous collision of plural blocks of respective rows with a road surface. Six rows 9, 10, 13 of blocks on a tread surface 1 are defined by five circumferential grooves 2, 3, 4 continuously extending in a tread circumferential direction in a zigzag manner, a plurality of lateral grooves 5, 6, 11 extending in a tread widthwise direction between the circumferential grooves adjacent to each other and between the outermost circumferential grooves 4 and respective tread side edges e. Five circumferential grooves 2, 3, 4 comprise narrow circumferential grooves 2, 4 and a pair of wide circumferential grooves 3 disposed on each side of the tire equator line and having a width greater than that of the narrow circumferential grooves 2, 4. The lateral grooves 5, 6 are inclined with respect to the tread widthwise direction. Each of the blocks 7, 8, 12 of the block rows 9, 10, 13 has a polygon planar contour shape with six or more sides such that a minimum length of the block in the tread widthwise direction is situated in an end portion of the block in the tread circumferential direction and a middle portion of the block in the tread circumferential direction has a length greater than the length of the end portion in the tread circumferential direction. Leading edges 7a, 8a, 12a of the blocks 7, 8, 12 of each rows 9, 10, 13 when the tire is rolling under load are spaced from each other in the tread circumferential direction.

The invention relates to a thread transmission type electronic expansion valve, and belongs to valves. An existing electronic expansion valve is large in running noise, and abrasion or clamping of a magnetic steel sleeve is prone to occurrence; the thread transmission type electronic expansion valve is characterized in that a backward step end face leaning shoulder is arranged on the outer circle face of a front base sleeve, the opening end of a back base sleeve is in butt joint with the step end face leaning shoulder in a fixedly welding manner to form a straight-cylinder-shaped shell with two ends closed, a front section of a nut sleeve is inserted into an inner cavity wall of the front base sleeve, and an end face leaning shoulder on the inner cavity wall and an inward turning edge of the opening end of the front base sleeve are used for limiting and fixing; a valve is installed in a hollow inner cavity of a valve rod sleeve fixed to the magnetic steel sleeve in a penetrating manner, the back end of the valve extends out of the back end of the magnetic steel sleeve, and a spacer bush and a spring arranged outside the valve rod in a sleeving manner are used for back stroke limiting; and the valve rod sleeve is matched with inner threads in an axial through hole of the nut sleeve through outer threads to drive the valve rod to move, a buffer connecting piece connected with the front end of the valve rod is arranged on the front section of the axial through hole of the nut sleeve to conduct guide supporting on the valve rod, circumferential limiting protrusions and limiting leaning shoulders which are matched with each other are arranged for front stroke limiting, and the collision noise and friction are reduced.

A core bar for a rubber crawler includes: right and left wing parts; an engaging part for connecting the wing parts; right and left protrusions to guide a rolling wheel; and right and left outside rails that are formed on outer sides of the right and left protrusions, respectively, and have overhanging parts extending in the widthwise direction of the wing part. The overhanging part is formed on an edge portion thereof with a surface that slants downward from a top surface of the outside rail.

A chain-sheet of chain can be outer chain-sheet, inner chain-sheet and joint chain-sheet according to the installing position, comprising a body and a first raised wing, wherein the body is at interval provided with a first side and a second side of the body, and two outer ends at interval side to side that connect the outer side edge, the first raised wing projects from one outer end with a first side of the first raised wing. The chain-sheet of the invention and another chain-sheet of the chain are assembled to make the first side of the raised wing is more closed to the other chain-sheet than the first side of the body, to reduce the gap between the chain-sheets and reduce the oscillating space while the chain-sheets are vibrated with advantages that it can increase the using safety and reduce the colliding force between the chain-sheets and the colliding noise or the like.

The invention discloses a stove for dinner comprising a water disk with an overturn cover arranged above, the water disk is provided with a hydraulic buffer which comprises a casing, a hydraulic buffer cylinder is arranged inside the casing, and both sides of the hydraulic buffer cylinder are respectively equipped with a driving mechanism capable of transforming rotation into linear movement and driving the hydraulic buffer cylinder to act, the driving mechanism is driven by a rotation base fixedly connected to the overturn cover, thereby buffering the action of the overturn cover when opening or closing the cover, reducing the noise caused by collision between the overturn cover and the water disk, and preventing the overturn cover from damage due to the collision.

Provided is a balance ring used for a washing machine. The balance ring used for a washing machine comprises a housing with an annular inner cavity. The annular inner cavity is provided with a viscous fluid and a plurality of balls which can roll along the annular inner cavity. One side of the annular inner cavity, close to the center shaft of the annular inner cavity, is provided with a liquid retaining device. When the balance ring is static or rotates around the center shaft in velocity lower than first rotating speed, the viscous fluid is absorbed by the liquid retaining device, and is maintained in the liquid retaining device. Thus, the viscous fluid in the annular inner cavity is reduced, and viscosity force of the viscous fluid on the balls is reduced, so the balls are remained in relatively low positions of the annular inner cavity and are not pushed to cross the highest point of the annular inner cavity, so as to prevent the balls from colliding each other and preventing noise. The invention also discloses a washing machine including the balance ring.

The invention relates to a sound attenuation and noise reduction device applied to an air duct. The sound attenuation and noise reduction device includes a flexible joint and a muffler. Flange piecesare arranged at both ends of the flexible joint and the muffler. A pipe at the original air duct is cut and removed, and the flange pieces are installed at pipe orifices by welding. The flange piece at one end of the flexible joint is connected with the flange piece on the end part of the pipe on one side, and the flange piece at the other end of the flexible joint is connected with the flange piece at one end of the muffler. The flange piece at the other end of the muffler is connected with the flange piece on the end part of the pipe on the other side. The sound attenuation and noise reduction device can realize arbitrary combination, disassembly and installation. Meanwhile, the sound attenuation and noise reduction device can be quickly connected and installed with the pipes at any desired position in an original pipeline. Through the installation of the sound attenuation and noise reduction device in the middle of the existing pipe, the impact of vibration generated during the operation of the air duct on existing surrounding structures can be efficiently and safely reduced, the decibel value of noise generated during the operation is reduced, and it is ensured that the factoryboundary noise meets the standard.

Provided is a balancing ring used for a washing machine. The balancing ring comprises a housing with an annular inner cavity. The annular inner cavity is internally provided with at least mass bodies capable of moving along the annular inner cavity. Centripetal sides of the mass bodies are provided with first magnets. The centripetal side of the housing is provided with an attraction part which can be attracted by magnetic force. Each balancing ring remains static or rotates around a central shaft at the speed lower than the pre-set rotation speed. The mass bodies are fixed by magnetic attraction of the first magnets and the attraction part. The mass bodies and the housing of the balancing ring rotate as a whole. When the balancing ring rotates around the central shaft at the speed higher than or equal to the pre-set rotation speed, centrifugal force enables magnetic attraction to be overcome. The mass bodies can move in the annular inner cavity at the proper position to achieve balance. The invention further discloses the washing machine having the balancing ring.

A ball screw includes: a nut; a screw shaft; and an end deflector that is attached to the nut, and has a guiding protrusion portion which protrudes toward a helical groove of the screw shaft, in which a guiding tip edge of the guiding protrusion portion picks up a ball and guides the ball into the end deflector, the end deflector includes a ball lifting portion that lifts the ball along one groove side surface of the helical groove, and the guiding tip edge picks up the ball lifted by the ball lifting portion.

The invention relates to a steel pipe blanking frame capable of automatically reducing noise, belonging to the technical field of the steel pipe. The steel pipe blanking frame comprises a plurality of chain lifting mechanisms, driving mechanisms and sensing mechanisms. The chain lifting mechanisms are sequentially connected with the driving mechanisms in series, the sensing mechanisms and chain lifting mechanisms are arranged oppositely, and the driving mechanisms are connected with the sensing mechanisms to receive control commands. The steel pipe blanking frame reduces the noise from the collision of steel pipes by reducing the steel pipe blanking disparity and the strength of the collision of the steel pipes.

A torsional vibration damper that can reduce collision noise of an inertia body when a rotary member is stopped, and a control device therefore. In the torsional vibration damper, a rotary member is mounted on an output shaft of an engine such that none of rolling masses is situated within a predetermined angle range above a rotational center axis of the rotary member when the engine is stopped. Therefore, when the engine is stopped, the inertia body will not be supported by only one of the rolling masses situated within the predetermined angle range.

The invention discloses a washing machine which comprises a bucket which can be rotated under driven of a motor, wherein an annular channel is disposed along circumferences of the bucket; multiple spheres which can roll along the channel are installed in the channel; and the multiple spheres comprise magnetic balls and non-magnetic balls which can be attracted by magnetic force. Because of attracting force of the magnetic balls, the multiple spheres can be attracted together to form a mass body, the spheres in the mass body do not collide, or a few of spheres on edges collide when rotational motion of the bucket is unstable, so that noise generated from sphere collision can be reduced effectively. The invention also discloses a balance ring used in the washing machine.