36results about How to "Avoid impact noise" patented technology

The invention discloses a compressor silencer, which is characterized by the following: forming a cross-shaped projecting part of crank through hole in the central part; extending outsides along the horizontal direction of projecting part to form a circular chassis structure; setting outlet hole along radial direction and through the chassis on two sides of cross-shaped projection part separately. The silencer is set on two lateral ends without setting inner plate, which avoids the noise of the rotor impaction directly.

A power steering apparatus includes a power cylinder including first and second pressure chambers, a hydraulic pump including first and second discharge ports, the hydraulic pump being arranged to supply a hydraulic pressure selectively to the first and second pressure chambers; first and second hydraulic passages connecting the first and second pressure chambers and the first and second discharge ports; a motor arranged to drive the hydraulic pump; a motor control section configured to output a drive signal to the motor; a reservoir tank storing a hydraulic fluid; first and second bypass passages connecting the first and second hydraulic passages and the reservoir tank; first and second bypass valves arranged to open and close the first and second bypass passages; and first and second flow rate restricting sections disposed in the first and second bypass passages, and arranged to decrease flow rates of the first and second bypass passages.

Provided is a heating device for a hot water mat that can minimize noise by a check valve for controlling flow of liquid. The heating device for a hot water mat includes: a water tank having a tub for keeping liquid and a discharge hole formed through a side of a lower portion to discharge the liquid in the tub; a heating module connected to the discharge hole and heating liquid; a separator disposed in the water tank, dividing the tub in to a first compartment at a lower portion and a second compartment at an upper portion, and having a connection hole for connecting the first compartment and the second compartment to each other; and a check valve disposed in the first compartment and opening and closing the connection hole by moving up and down by buoyancy from the liquid in the first compartment.

The present invention discloses a method for controlling a multi-compartment type refrigeratory. The method includes a compressor operating step and a drive controlling step. The compressor operating step includes: confirming whether there are one or more storages of the storages need to be refrigerated; opening a valve of a storage if the storage need to be refrigerated; confirming whether there are one or more new added storages of the storages need to be refrigerated after a predetermined first time; opening valve of new added storages and starting the compressor if the new added storages need to be refrigerated. The drive control step includes: confirming whether the storages need to be refrigerated during the running process of the compressor again, and selectively opening or closing the valves of the corresponding storages based on the confirm result.

The invention relates to a pull-type self-aligning hydraulic release bearing sub-pump unit, which is used for heavy-duty trucks and applicable to heavy-duty commercial vehicles and passenger vehicles with D430 pull-type clutches and belongs to the technical field of automobile bearings. The pull-type self-aligning hydraulic release bearing sub-pump unit comprises a mounting connection mechanism, an aligning mechanism, a bearing mechanism, a hydraulic sub-pump mechanism, a dustproof mechanism and an auxiliary mechanism. The mounting connection mechanism consists of a clutch connecting part and a gearbox connecting part and comprises a separation pull ring, a hoop, a fixing ring and a spiral compression spring. The aligning mechanism comprises an aligning spring plate, an aligning spring plate supporting ring and an aligning spring plate fixing ring. The bearing mechanism comprises an outer ring, an inner ring, a retainer, a steel ball and a bearing seal ring. The hydraulic sub-pump mechanism comprises a cylinder block, a piston, a first leather ring, a second leather ring, a piston ring and a cylinder block ring. The dustproof mechanism comprises an outer dust cover and an inner dust cover, and the auxiliary mechanism comprises an oil inlet screw, a pressure plate and an outer cover.

The invention discloses a flexible telescopic mechanism used for a bridge. The flexible telescopic mechanism comprises a crossed connecting rod assembly. The connecting positions of the crossed connecting rod assembly are connected through flexible linings. The flexible linings are arranged in the connecting positions of the crossed connecting rod assembly in an interference fit manner. Connectingseats connected with a bridge beam body are rotationally installed in the flexible linings at the crossed connecting positions of the crossed connecting rod assembly, and pin shafts are installed inthe flexible linings at the connecting positions of the end portions of the crossed connecting rod assembly in a clearance fit manner. By means of the flexible telescopic mechanism used for the bridge, the uniformity of the seam width of the beam body is ensured, the flexible telescopic mechanism can adapt to the certain displacement and rotating angle between an edge beam and a middle beam of thebridge when a vehicle passes through the bridge, the impact effect is weakened, the service life is prolonged, the driving comfort is improved, impact noise is lowered, the problems that the seam width of an original telescopic device is not uniform and the impact response is large can be well solved, flexible deformation of the telescopic mechanism is achieved through the flexible linings, the horizontal impact effect of the telescopic mechanism is weakened, the impact and vibration noise caused when the vehicle passes through the bridge are weakened, and the comfort of the vehicle is improved. The invention further provides a bridge telescopic device.

The invention discloses a steering device. The steering device comprises a steering device shell and a gear rack (1) arranged in the shell. The shell comprises an outer shell (2) and a liner (3). A gear rack bush (4) is arranged between the gear rack (1) and the liner (3). An elastic bush (6) with a buffer effect is further arranged between the gear rack (1) and the liner (3) and is a double-layer annular bush composed of an inner-layer elastic piece (61) and an outer-layer elastic piece (62). The steering device is low in modification degree, low in cost, suitable for improvement on existing products and high in usability; abrasion to the gear rack bush can be reduced, so that durability is good.

The invention discloses a small-sized low-noise centrifugal fan and a ventilator using the centrifugal fan. The fan includes fan blades, an upper volute and a lower volute, and a motor installation cavity is arranged in the center of the lower volute, in which a DC A brushless motor is provided with a through hole on the axis of the fan blade, and the through hole is used to cooperate and lock with the extension shaft of the motor; the upper volute and the lower volute are locked and assembled, and the fan The leaf is composed of a plurality of arc-shaped short blades, a plurality of arc-shaped long blades and a base plate, the number of the arc-shaped short blades and the arc-shaped long blades is equal, and they are alternately and uniformly arranged on the base plate. The novel centrifugal blower has the advantages of high performance, low noise, small size, simple structure and easy manufacture.

The invention belongs to an abat vent buffer for vehicles and vessels. The abat vent buffer is provided with a transmission damping jacket, wherein a protruding clamp gear is arranged at one end of the transmission damping jacket, and a fixed shaft of a damping shaft penetrates through a through hole formed in the protruding clamp gear of the transmission damping jacket to be fixedly connected with the side surface of a shutter base frame in a matched mode. A damping inner hole is formed at one end of the transmission damping jacket, damping grooves are evenly distributed on the wall of the damping inner hole, a threaded shaft of the damping shaft is in threaded connection with the a damping shaft sleeve, and protruding strips used for generating damping force are evenly distributed on an outer cylinder of the damping shaft sleeve. The damping shaft and the damping shaft sleeve are arranged in the damping inner hole of the transmission damping jacket, the damping shaft sleeve and the damping inner hole are in fit connection at intervals, high-viscosity oil for assisting damping is filled in the damping inner hole, and the end surface of the damping inner hole is pressed by an end cover for seal. The abat vent buffer for vehicles and vessels has the effects of good stability, long service life, strong universality, muting and shock absorption, and thorough unreeling buffer, and can be applied to abat vents of various small, medium and large-sized vehicles, vessels and special mechanical vehicles as well as civil shutters.

A dividing plate structure of enclosed compressor is disclosed. It is inserted in the internal space of cylinder to divide it into at least two sealed spaces. The barriers is in contact with the upper and lower surfaces of dividing plate for switching said sealed space between suction space and compression space. It feature is that the upper and lower surfaces of dividing plate are curved surfacefor decreasing impact noise and friction.

The invention discloses an emergency evacuation ramp for an urban rail vehicle and a control method. The emergency evacuation ramp comprises a folding ramp main body, wherein racks are arranged on the two sides of the front end part of the ramp main body respectively; four-rod mechanisms for realizing folding or expanding of the ramp main body are arranged on the two sides of the ramp main body; the racks are connected with the four-rod mechanisms on the corresponding sides through speed-limiting dampers respectively; the expanding speed of the ramp main body is controlled by the speed-limiting dampers; the end parts of the speed-limiting dampers are hinged to the racks and the four-rod mechanisms. By additionally arranging the speed-limiting dampers for stabilizing the ramp expanding speed, damping force is produced by the dampers to control the expanding speed when the expanding speed exceeds a set value, impact damage caused to parts and impact noise are avoided, the service life is prolonged, the safety performance is improved, and good application prospect is realized.

The present invention discloses a method for controlling a multi-compartment type refrigeratory. The method includes a compressor operating step and a drive controlling step. The compressor operating step includes: confirming whether there are one or more storages of the storages need to be refrigerated; opening a valve of a storage if the storage need to be refrigerated; confirming whether there are one or more new added storages of the storages need to be refrigerated after a predetermined first time; opening valve of new added storages and starting the compressor if the new added storages need to be refrigerated. The drive control step includes: confirming whether the storages need to be refrigerated during the running process of the compressor again, and selectively opening or closing the valves of the corresponding storages based on the confirm result.

The invention discloses an electronic squatting pan with a heating cushion, which comprises a main body, a heating cushion, a controller, and a pipeline, wherein the heating cushion forms the rotating constraint for a fixed hinge support with the main body, the main body is a fixed part of the fixed hinge support, and the heating cushion is a constrained part of the fixed hinge support; the controller is arranged in the main body; and the pipeline is connected with the controller and the heating cushion. The fixed hinge support comprises a fixed hinge support at the left side of the main bodyand another fixed hinge support at the right side of the main body which are positioned at the same axis line; and the pipeline is led out of the controller, then passes through a section of inner cavity of the fixed hinge support along the axis line, and is connected with the heating cushion. The design smartly utilizes the section of the inner cavity of the fixed hinge support for the pipeline to pass through to ensure that the pipeline is concealed inside further to obtain effective protection and more beauty; and the pipeline is arranged on the rotating axis line of a hinge, thereby greatly reducing the influence of the torsion on lectronic squatting pan caused by the rotation of the heating cushion, and improving the service life and the reliability.

The present invention relates to an automatic tension controlling apparatus for a thermotherapy device, and more specifically, an automatic tension controlling apparatus for a thermotherapy device, comprising: a transport member (10); a driving force transferring member (20), connected to the transport member (10), for transferring driving force to the transport member (10) through a driving means (40); and a tension control means (30), coupled to the transport member (10), for maintaining and controlling the tension of the driving force transferring member. As a result, the present invention provides the automatic tension controlling apparatus in which the driving force transferring member for transferring driving force to the transferring member transfers driving force by being coupled to the transport member, and when the driving force transferring member becomes lax due to extension or loosening from long-term use when an option such as a chain, a timing belt, a rope, or a steel wire is used as the driving force transferring member, the tension control means controls so that tension is maintained at a constant level by pulling the driving force transferring member as much as the length that is loosened, thereby enabling smooth transport work by the transport member, reducing loss of driving force, preventing friction noise due to the driving force transferring member or shock noise from coming into contact with a bottom surface, and prevents unnecessary increase of tension in the driving force transferring member to prevent deformation of a housing of the thermotherapy device due to contraction or distortion.

An automatic tension adjustment device for a thermotherapy instrument is provided, comprising: a transfer member (10); a power transmission member (20) connected to the transfer member and transmitting power to the transfer member (10) through a driving device (40); A tension adjusting device (30) installed on the transfer member (10) to adjust and maintain the tension of the power transmission member. Therefore, the present invention proposes an automatic tension adjustment device for a thermotherapy instrument. The tension adjustment device pulls the power transmission member to a slack length and maintains the tension of the power transmission member at a constant level, so that the transfer work of the transfer member can be performed smoothly. Reduce power loss, prevent friction noise caused by power transmission components and impact noise due to contact with the ground. Moreover, the tension of the power transmission member is prevented from increasing unnecessarily, so as to prevent shrinkage deformation and twist deformation of the housing of the thermotherapy device.

The present invention provides a control method for a dryer, including: a load judging step of supplying hot air to the inside of the drum by driving a heater and a fan motor together with the driving of the drum, and based on the temperature detected by the temperature sensor from the The temperature change of the air discharged from the drum is used to judge whether the load applied by the clothes stored in the drum is a temporary small load or a medium-to-large load; the second load judgment step is after the primary load judgment step. When it is judged as a tentative small load in the primary load judging step, the secondary load judging step is selectively performed, and in the secondary load judging step, the hot air supply is interrupted and the drum is driven while using The dryness sensor provided on the drum judges whether the load is a small load or a very small load; the drying step is to perform drying according to the load judged in the primary load judging step or the secondary load judging step.