295results about How to "Reduce transmission noise" patented technology

The invention discloses a rocking arc narrow gap consumable electrode gas shielded welding method and a welding torch. The method comprises the following steps: a connecting cable is fixed on an electric brush mechanism and a coupling head; a hollow shaft motor is connected with a straight conducting rod through a shaft joint; a welding wire passes through a center hole of a cable coupling head, and penetrates out a center hole of a current contact nozzle; the lower end of the straight conducting rod is fixed with a connecting piece; and one end of a minor bend conducting rod is connected with the straight conducting rod through the connecting piece, while the other end of the minor bend conducting rod is connected with the current contact nozzle. The hollow shaft motor directly drives the straight conducting rod and the minor bend conducting rod capable of extending into a divided edge of a workpiece to make reciprocating rotation around the central axial line of the welding torch, thereby driving electric arc of the end of the welding wire send from the center hole of the current contact nozzle to make arc rocking in the divided edge of the workpiece so as to realize rocking arc narrow gap welding. The welding torch has the advantages of simple and compact structure, low implementation cost, high reliability of operation, strong practicality, and can adapt requirement of welding process for mean position and spatial position with different welding seams. The welding wire has strong rocking regulation, good directivity of the electric arc, and high welding quality.

Apparatus, method, and software for electrocardiogram-assisted non-invasive arterial blood pressure d stiffness measurement is disclosed including brachial cuff with flexible electrodes, control box with rigid electrodes, and associated hardware/software. Cuff is wrapped around upper arm while electrodes on device are touched with fingers of other hand. Device acquires simultaneous ECG/oscillometric data during cuff deflation. Processing unit determines ECG R-peak positions to isolate arterial pulses and calculate pulse transit time. Change in pulse amplitude as function of cuff pressure is used for constructing oscillometric envelope and calculating blood pressure using empirical coefficients. Change in pulse transit time as function of cuff pressure is used independently for constructing pulse transit time envelopes and finding blood pressure with/without empirical coefficients. Fusion algorithm combines results for robust blood pressure and vessel stiffness evaluation. Device sends physiological information to personal computer/smartphone wirelessly, for further analysis. Computer/smartphone transmits information to third party for patient management.

A sound attenuating cover for a scroll compressor is provided. The cover has a base member configured to support the compressor, the base defines a first chamber filled with a sound attenuating material. The sound attenuating chamber further has a cover member configured to cover the compressor and couple to the base, said cover member defines another chamber. This chamber is additionally filled with a sound attenuating material.

A high-quality regenerated rubber and its production are disclosed. It improves composition and proportion, it adopts high-temperature and pressure desulfurizing method in short time and refining process is added. The tensile strength and breaking extensibility can be increased by 30-60%; it can substitute natural rubber or synthetic rubber and be used as various tyre and raw material of rubber products. It's simple, efficient and smokeless, has excellent abrasive performance, long life, less noise and no refused water discharge.

The invention relates to a worm gear-worm pair backlash eliminating device adopting an enveloping worm, which mainly consists of a worm gear, a cylindrical worm, the enveloping worm, an elastic pre-tightening device and a bearing. The cylindrical worm and the enveloping worm play the main force scale division role and the resistance role respectively, and the two worms are coaxially mounted and carry out the regulation and impose the pre-tightening force on a resistance worm in the axial direction through the elastic pre-tightening device. The pre-tightening device consists of a regulating nut, two spring positioning sleeves and a pre-tightening spring, regulates and pre-tightens the resistance worm in the axial direction through the regulating nut. The elastic pre-tightening device can be one of a spring device, a hydraulic device or a pneumatic device. The resistance enveloping worm and the main force worm are coaxially mounted in the worm gear-worm pair backlash eliminating device, and the axial regulation and the pre-tightening are carried out on the resistance worm through the elastic pre-tightening device, thereby providing the more stable, high-efficient and low-noise transmission and simultaneously having the advantages of compact structure, light weight, low cost and the like. The worm gear-worm pair backlash eliminating device is applied in a transmission mechanism of a rotary workbench of a machine tool and can provide better backlash eliminating effect in comparison with a single worm gear-single worm mechanism or a double-worm gear-worm mechanism.

The invention relates to a ship-used permanent magnet motor propeller, which comprises a motor, a shell and a propeller, and is characterized in that the motor is a permanent magnet motor; the permanent magnet motor comprises a stator and a rotor; the stator comprises a stator sleeve; the stator sleeve is located inside the shell; the stator sleeve is internally, circumferentially and uniformly provided with stator coils; an insulated layer is arranged outside the stator coil; the rotor comprises a rotor sleeve; permanent magnets are circumferentially and uniformly arranged inside the rotor sleeve; a gap is left between the permanent magnet and the stator coil; bearings are arranged between two ends of the stator sleeve and two ends of the rotor sleeve; two ends of the stator sleeve and two ends of the rotor sleeve are provided with round air guide sleeves; the air guide sleeve has a nearly conical cross section, and two edges are respectively connected with the same ends of the shell and the rotor sleeve; paddle blades are circumferentially and uniformly arranged inside the rotor sleeve; and the rotor sleeve and the inner circumferential paddle blades form the propeller. The ship-used permanent magnet motor propeller is simple in structure, small in size, small in occupied space, and little in noise, facilitates health of an operator, can avoid environmental pollution, and can be applied to a ship.

The continuous micro deformation RE-carbon co-penetrating process for gear of automobile gear box is realized via making the pre-treated workpiece enter the different regions with RE co-penetrant in continuous carbonizing furnace at 840-890 deg.c. The workpiece is made to enter successively region-I for preheating and pre-penetrating; region-II and region-III with carbon potential of 1.15-1.25 % for carbonizing; region-IV with carbon potential of 0.8-1.05 % for diffusion treatment; and region-V with carbon potential of 0.8-1.05 % for waiting for discharging and quenching. The present invention is one controllable low temperature RE high concentration gas carbonizing process capable of resulting in optimal metallurgical structure, and has the advantages of high carbonizing rate, high efficiency and low power consumption.

Trim disk assemblies for use in fluid flow control devices include a first disk and a second disk. An elongated void is formed in a surface of each of the first disk and the second disk. The second disk is aligned with the first disk to provide fluid communication between the void of the first disk and the void of the second disk, the void of the first disk being offset or staggered from the void of the second disk. The void of the first disk and the void of the second disk at least partially define a fluid passageway having a cross-sectional area characterized by increases and decreases in cross-sectional area, which define an expansion/contraction mechanism of the fluid passageway.

An RF pulse signal generation switching circuit for controlling an output of a power FET for amplifying a high frequency signal to generate an RF pulse signal that is the high frequency signal pulse formed into a pulse-wave shape is provided. The circuit includes first and third n-type FETs of which gates are inputted with a control pulse that supplies a rise timing and a fall timing of a pulse, and a second n-type FET of which a gate is connected with a drain of the first FET. A source of the first FET and a source of the third FET are grounded, respectively. The drain of the first FET is applied with a first drive voltage via a resistor. A drain of the second FET is applied with a second drive voltage. A source of the second FET is connected with a drain of the third FET and the connection point therebetween is connected with the power FET. A capacitor is connected between the connection point and an end of the resistor from which the first drive voltage is applied.

The invention provides an electric roller conveyor with aluminum alloy beams, which is characterized by comprising an aluminum alloy supporting leg; the upper side of the aluminum alloy supporting leg is provided with the aluminum alloy beams; at least one electric roller is arranged between two aluminum alloy beams; each electric roller and at least six unpowered rollers form a group; and the electric roller is connected with an external PLC system. The electric roller conveyor for the aluminum alloy beams has the advantages that the transmission noise of the electric roller and an O-shaped ring is low; both the aluminum alloy beams and the aluminum alloy supporting leg are made of aluminum profile, the production process is simple, and the production period is short; no motor decelerator is provided, and the whole space utilization rate is high; the power consumption for conveying unit materials is low, and the energy consumption is saved; and the structure is simple, vivid, small and beautiful.

The invention relates to a high-speed metal wire drawing machine, and belongs to the technical field of a metal wire drawing machine. The high-speed metal wire drawing machine comprises a rack and a motor, wherein a low-speed guide wheel set, a low-speed mould base, a high-speed guide wheel set, a high-speed mould base and the like are arranged on the rack; the motor is sequentially connected with a driving pulley, a driven pulley and a high-speed cone pulley set; the high-speed cone pulley set is in transmitted connection with a constant-speed wheel and is in meshed and transmitted connection with a low-speed cone pulley set; the low-speed guide wheel set is connected with the low-speed cone pulley set. The chain or gear transmission of the constant-speed wheel and the high-speed cone pulley set is changed into synchronous belt transmission, synchronous belt wheels are connected with shafts through taper locks, the replacement is convenient, and therefore the different speed ratios between the constant-speed wheel and the high-speed cone pulley set is obtained, so that only one mould is needed when customers draw a variety of specifications of metal wires. The mould cost is greatly reduced. The high-speed metal wire drawing machine has the advantages of simple design, high wire drawing speed, low energy consumption, good economic benefit and strong practicality, greatly reduces transmission noises, and brings security assurance to the personal safety of operating personnel.

The invention provides a gear grinding machining method and device. The method adopts an abrasive belt which is high in grinding efficiency, the abrasive belt is in high-speed motion along the tooth width direction of a gear to conduct grinding, and the abrasive belt is in generating motion relative to a gear blank to grind each tooth socket tooth surface sequentially and swings slightly relative to the generatrix of the tooth surface to achieve crowned tooth surface shape correction. The device for achieving the grinding machining method is provided and comprises a bed body, a lifting table, a gear blank rotation dividing head, a gear blank flat moving work table, a gear blank dip angle table, an abrasive belt feeding work table and an abrasive belt deflection rotary disc. A numerical control system controls all the portions to be in linkage and conducts complementation of abrasive belt abrasion loss, machining of various gears can be achieved by using suitable press grinding plates and belt guiding wheels or guiders, disc-shaped or worm-shaped grinding wheels are not required, and the method and device has high machining efficiency and machining quality.

The invention discloses a multipurpose vegetable cutting mechanism and a multifunctional vegetable cutting machine and belongs to the technical field of vegetable cutting machines. According to the multipurpose vegetable cutting mechanism, an inclined vegetable guiding opening is formed between a vegetable baffle and a slicing knife fixing part which is horizontally provided with a slicing knife located on a vegetable inlet of the vegetable guiding opening, and a secondary vegetable cutting cavity is formed below a vegetable outlet of the vegetable guiding opening; a blade assembly is installed below a vegetable hopper, and a horizontal movement starting point and an end point of the slicing knife are located on the two sides of a vegetable entrance of the vegetable hopper respectively; longitudinal shredding knifes which are vertically arranged and located on the vegetable inlet of the vegetable guiding opening are selectively installed on the vegetable baffle; transverse shredding knifes which are horizontally arranged and used in cooperation with a cutting-off chopping board are selectively installed in the secondary vegetable cutting cavity. The invention further discloses the multifunctional vegetable cutting machine. On the basis that the principle of the cutting mechanism and the cutting machine is similar to that of manual vegetable cutting, vegetables are fast cut off, vegetable fiber texture is kept intact, the cut vegetables taste good, and the problem that vegetables are seriously extruded when the vegetables are shredded and cut into blocks through single procedures is solved in the aspect of the principle.

The invention discloses an external star wheel type overrunning clutch, and belongs to the technical field of clutch manufacture. The external star wheel type overrunning clutch is provided with an external star wheel (1), an embedded block (2), a pin roller (3), a permanent magnet (4) and an inner ring (5), wherein one side of the external star wheel is provided with a groove for accommodating the permanent magnet, a start wheel working face of the external star wheel is provided with a dovetail groove-shaped embedded alloy (2) (embedded block for short), and the working face is a logarithmichelical curved surface. The clutch has the advantages of simple manufacturing process, high working reliability, large bearing torque and long service life, can bear large torque force and impact force, and can work for long time under high-speed heavy load.

The invention provides a machining method of an injection molding face gear electrode and an injection molding face gear. A face gear transmission principle is used, a three-dimensional vector diagram of the face gear is generated in a generating method through computer-assisted software, then the injection molding face gear electrode is machined through a numerical control lathe, a mold cavity of the face gear is machined in an electric spark discharge technology, and accordingly the face gear is formed by infection molding. Due to the fact that transmission data of the face gear and a cylinder gear is simulated in a computer, the machined infection molding face gear completely meets face gear transmission requirements in practice, data is accurate, the face gear is fixed on a table face to be machined through the numerical control lathe, deformation cannot happen, and therefore the machined injection molding face gear electrode is high in accuracy and low in transmission noise. What is important is that technologies such as gear inserting or gear rolling or gear grinding are not used in machining of the injection molding face gear electrode, so that special knives are of no need, and cost is greatly lowered.

The present invention relates to gear manufacturing technology, and is especially completely cutting gear shaped gear shaving cutter with involute end section edge for finishing of gear before quenching, completely cutting gear shaped honing wheel for machining hard gear surface after quenching and their usage. The present invention includes skewed-tooth gear shaving cutter and skewed-tooth honing wheel, and features that each edge can cut from the dedendum to addendum continuously and that each tooth shape curve of the skewed-tooth gear shaving cutter and the skewed-tooth honing wheel is fitted into approaching involute. The present invention is realized with the special design program PICM.

The invention discloses a gear hub motor lubricated by liquid lubricating oil. The gear hub motor comprises a left end cover, a right end cover, a main shaft an a hub, wherein the left end cover sleeves the main shaft through a first bearing and a first oil seal; an oil filling opening is formed in the left end cover, the right end cover or the hub; the right end cover sleeves the main shaft through a second bearing and a second oil seal; the left end cover is connected with the right end cover through a seal ring and the hub; the left end cover is connected with a solar gear ring through a reducing mechanism; the solar gear ring is fixed on the motor; and the solar gear ring is driven to rotate through the motor, so that the left end cover is driven to rotate through the reducing mechanism to drive the hub to rotate. A two-stage reduction planetary gear reducer mechanism is adopted under the premise of keeping a through shaft structure, so that the reliability of the hub motor structure is ensured; the high-speed performance of a disc-type coreless DC motor can be fully developed; the reducing mechanism is lubricated by the liquid lubricating oil; and the transmission efficiency of the motor is high.

Openings in the covering sheet of the chamber (32) are formed as slots orientated along the flow direction. The open areas (33) amount to about 6-14% of the total area (31) of the chamber. Slot length to width ratio exceeds 3, and the slots differ in length.

The invention provides a small-sized single-rotor unmanned helicopter speed change system, which comprises an engine, a gearbox and a tailing box, wherein the gearbox comprises a box base and a box upper cover; the box upper cover is arranged on the box base in a sealed way; an inner cavity is formed between the box upper cover and the box base; and the small-sized single-rotor unmanned helicopter speed change system also comprises a one-stage transmission mechanism, a tail rotor mechanism and a propeller mechanism. The small-sized single-rotor unmanned helicopter speed change system has the advantages that a transmission system only has two-stage transmission; and a tail rotor and a propeller obtain power from two-stage transmission. Compared with the three-stage transmission of the existing small-sized single-rotor unmanned helicopter speed change system, the small-sized single-rotor unmanned helicopter speed change system has the advantages that the transmission stages are reduced; the transmission noise is reduced; the transmission efficiency is improved; components are reduced; the weight is reduced; the load on the engine during the flight is reduced; the gearbox part only comprises one-stage transmission; during the operation, the vibration is reduced, so that the interference of the vibration on electronic equipment is reduced; and the flight safety and the flight reliability are guaranteed.

The invention discloses an automotive air conditioning damper moving mechanism which comprises a damper, a damper poking rod and a drive plate. A track groove is arranged on the drive plate, an end of the damper poking rod is provided with a cylindrical boss extending into the track groove and having rolling friction with an inner wall of the track groove, and a sheath is sleeved on an outer wall of the cylindrical boss. By means of the structure, the automotive air conditioning damper moving mechanism has the advantage that the sheath structure enables two components in the drive plate, the poking rod and the sheath to be in opposite rolling motion, materials of the two opposite moving components are different, moving is stable, friction resistance is small, and transmission noise is low; the moving mechanism is compact, simple in transmission process, simple and clever in structure; the damper can be taken to a preconceived design position, and control is precise and stable and noise is low during the process; and all components of the transmission mechanism rotate around the normal axis of the casing, and occupied space is small.

The invention relates to the technical field of specialized robots, in particular to a two-wheel-leg-caterpillar band compound type movement mechanism. The two-wheel-leg-caterpillar band compound typemovement mechanism comprises a movement seat body, walking wheels, swing leg drive mechanisms and swing leg assemblies. The two walking wheels are installed at the left end and the right end of the movement seat body. Walking wheel drive motors are arranged in the walking wheels. The swing leg assemblies are arranged on the front side and the rear side of the movement seat body. The two swing legdrive mechanisms are arranged on the movement seat body. The swing leg assemblies on the two sides of the movement seat body are driven by the different swing leg drive mechanisms to swing. The swingleg assemblies located on the same side of the movement seat body are connected through a swing leg drive shaft. The swing leg drive shafts are driven by the swing leg drive mechanisms to rotate anddrive the swing leg assemblies to swing. The swing leg assemblies are provided with caterpillar bands. When the walking wheels make contact with the ground to rotate, the caterpillar bands leave the ground, and when the caterpillar bands make contact with the ground to rotate, the walking wheels leave the ground. The problems that an existing robot movement mechanism is poor in maneuvering flexibility, low in movement efficiency and the like on a complex terrain are solved.