42results about How to "Change the amplitude" patented technology

A backpack type small berry picking machine comprises a back frame, a miniature gasoline engine, a centrifugal type clutch, a steel wire flexible shaft, a secondary gear drive mechanism, an eccentric vibration mechanism, a housing, a front annular handle, a rear handle, and branch vibrators; the miniature gasoline engine is arranged on the back frame through a vibration isolation rubber pad; an output shaft of the miniature gasoline engine is connected with an input end of the steel wire flexible shaft through the centrifugal type clutch; a square joint of the output end of the steel wire flexible shaft is connected with a square interface of an axle drive bevel pinion of the secondary gear drive mechanism; the eccentric vibration mechanism comprises an upper crank, a lower crank, an eccentric adjustable camshaft, a dual-face guide rail, an upper reciprocating oscillating lever and a lower reciprocating oscillating lever; the branch vibrators are respectively fixed on the front ends of the upper and lower reciprocating oscillating levers; the front portion and rear portion of the housing are respectively provided with a front annular handle and a rear handle; the rear handle is provided with a speed regulator; the speed can be regulated so as to allow the small berry branches to generate different frequency vibrations, and the vibration force can separate the small berries from the branches.

The invention discloses a parallel mechanism based single drive one-translation two-rotation three-dimensional sand filling vibration-compaction machine. The machine comprises a fixed pedestal, a movable platform, a driving branch chain I and a driven branch chain II; the driving branch chain I and the driven branch chain II are respectively positioned at the left and right sides of the fixed pedestal; the two ends of the driving branch chain I are respectively connected to the fixed pedestal and the movable platform; the two ends of the driven branch chain II both are connected to the fixed pedestal; and the driven branch chain II is connected to the movable platform via a rotation pair R2. When a single drive is applied to the driving branch chain I, the movable platform can simultaneously carry out a three-dimensional vibration form of vertical vibration, deflection vibration and pitch vibration; the vibration-compaction machine has the characteristics of single input and multiple outputs, and is simple in structure, convenient in manufacturing and maintenance, energy-saving and reliable; through regulating a displacement drive on a moving pair, the vibration frequency and amplitude of the vibration platform can be changed; and by combining with a sand filling process, the fuse sand filling compactness is improved, and the fuse production efficiency is improved.

The invention discloses an electric toothbrush, which includes a main body and a brush head, the main body and the brush head are flexibly connected through a movable part, and further includes: a motor; a steel wire, the first end of which is connected to the output shaft of the motor, And can rotate with the output shaft; the eccentric shaft is arranged in the movable part, the first end of the eccentric shaft is connected with the second end of the steel wire, and rotates with the steel wire, the eccentric shaft The second end is connected to the movable part in such a way that the movable part moves with the second end of the eccentric shaft in the radial direction, wherein: the steel wire has at least one curved section, and the curved section is limited to on the same plane. Since the steel wire of the above structure is arranged between the eccentric shaft and the motor, the axial position and radial position of the eccentric shaft can be changed, thereby changing the vibration frequency and amplitude of the brush head, thereby meeting different requirements for vibration.

The invention discloses a modulation type piezoelectric loudspeaker, a loudspeaker system and a control method thereof and relates to the technical field of loudspeakers. The modulation type piezoelectric loudspeaker comprises a casing, a sound production piezoelectric piece, a sound production vibrating diaphragm and a piezoelectric valve, wherein the sound production piezoelectric piece and the sound production vibrating diaphragm are combined together. The sound production piezoelectric piece is used for driving the sound production vibrating diaphragm to generate oscillation air flow under the driving of audio driving electrical signals; and the piezoelectric valve is used for moving under the driving of control driving electrical signals so as to open or seal an air outlet of oscillating air flow or adjust the opening degree of the air outlet. The loudspeaker system and the loudspeaker system control method are provided. According to the modulation type piezoelectric loudspeaker, the opening and closing of the air outlet of the oscillating air flow generated by the sound production vibrating diaphragm and the size of the air outlet are controlled through the opening and closing of the piezoelectric valve, so that frequency of sound signals output by the loudspeaker is changed, high-fidelity replayed sounds are obtained while enough output air flow quantity is guaranteed, the structure is simple and reliable, the area of the piezoelectric piece does not need to be increased, and miniaturization is achieved easily.

The present invention relates to an ultra sensitive in-situ magnetometer system, and more particularly to an ultra sensitive in-situ magnetometer system that can in-situ monitor a magnetic moment of a magnetic thin film with sub-monolayer precision while depositing and growing the magnetic thin film in an ultra high vacuum (UHV) chamber.

The invention discloses an automobile tire vibration excitation device and method for an automobile in an amplitude adjustable running state. The device comprises a vibration excitation device body, a transmission mechanism and a tightening mechanism, the vibration excitation device body comprises a crank shaft, an upper push rod, a lower push rod and a carrier table, the crank shaft capable of structurally rotating is mounted in a lower box, a lead screw guide rail mechanism can be mounted below each individual vibrating table in order to move the vibrating table, the distance between the vibrating tables is changed by rotating lead screws, a motor is connected with the vibrating tables in a belt transmission manner, belt transmission can loose and generate slip after the distance between the two vibrating tables is shortened, the motor can be mounted on a lifting table in order to avoid slipping and tension a conveyor belt again, the conveyor belt is stretched by changing the height of the motor, and the automobile tire vibration excitation device can normally run.

The invention discloses a vibratory separation test bed for pedicels of wine grapes. The vibratory separation test bed comprises a frame, a vibration mechanism, a data collector, a sensor, a fixing ring and an air pump. The vibration mechanism drives grape vines to vibrate, the fixing ring comprises a first semi-ring, a second semi-ring, air bags, a locking mechanism and a sliding part, the first semi-ring and the second semi-ring are each internally provided with one air bag, and the air pump is installed on the frame and inflates the air bags; an arc-shaped groove in a circumferential direction is formed in the outer arc surface of the first semi-ring, the sliding part comprises an arc-shaped plate, a transverse plate and a vertical plate, the two ends of the transverse plate are connected with the arc-shaped plate and the vertical plate respectively, the transverse plate penetrates through the arc-shaped groove, the vertical plate is used for installing the sensor, and the sensor is connected with the data collector. According to the vibratory separation test bed for the pedicels of the wine grapes, the sensor is installed by the fixing ring with the air bags, the sensor can be mounted and dismounted through inflation and deflation of the air bag, operation is convenient, time and labor are saved, the sensor can adapt to the grape vines in any shape, and mechanical damage to the grape vines is avoided.

The invention discloses a fixing chuck of a plastic pipeline cutting machine. The fixing chuck structurally comprises a fixing part, a cutting sleeve, a motor, a protective cover, a control button and a supporting frame, wherein the fixing part is movably matched with the interior of the cutting sleeve, the cutting sleeve is matched with the interior of the protective cover in a nested mode, the left side of the protective cover is fixed to the motor through a bolt, the motor is movably matched with the interior of the cutting sleeve, the lower end of the cutting sleeve is fixed to the surface of the supporting frame through bolts, the upper surface of the supporting frame is hinged to the lower end of the protective cover, and the fixing part comprises a clamp, a crank handle, a carrying frame, a protective plate and a pipe groove. According to the invention, the plastic pipeline is supported through the pipe frame, shock absorption is performed through pressure reducing seats on the two sides while the plastic pipeline is supported, so that the vibration force generated during cutting is counteracted, a supporting rod and an air pressure cavity of the supporting rod are buffered under the cooperation of a cushion block, the vibration amplitude is changed, vibration generated during cutting is effectively counteracted, and the problem that the cutting precision is not high due to the fact that the upper end frame pipe base shakes is solved.

The invention discloses a double-layer independent shock excitation screening device used for shield construction muck treatment. The device comprises an equipment installation support. An upper-layerbox body and a lower-layer box body are arranged on the equipment installation support. The bottom of the upper-layer box body communicates with the top of the lower-layer box body, an upper-layer screen and an upper-layer excitation motor are arranged in the upper-layer box body, a lower-layer screen and a lower-layer excitation motor are arranged in the lower-layer box body, and the particle size of the upper-layer screen is larger than the particle size of the lower-layer screen. By means of the double-layer independent shock excitation screening device used for shield construction muck treatment, the upper-layer box body and the lower-layer box body are in a series connection relationship, muck is subjected to two stages of screening treatment through the upper-layer screen and the lower-layer screen, and the overall treatment efficiency and treatment effect of the screening device can be effectively improved; and in addition, the upper-layer box body and the lower-layer box bodyare independent from each other in structure and function, the same vibration characteristic or different vibration characteristics can be used for different types of muck for vibration screening, thescreening device can achieve muck screening with different characteristics, and the overall treatment efficiency of the screening device is further improved.

The invention discloses a low-frequency vibration cutting chip breaking device which comprises a shell, a vibration cutting device and a power device. The vibration cutting device includes an amplitude modulation module, a vibration transmission module and a power transmission module. The amplitude modulation module of the device can realize each-degree graded adjustment between 0 degree and 360 degrees by using a double eccentric sleeve combination, a worm and gear mechanism and an angle indicating mechanism, and continuous adjustment of the vibration amplitude within the specified range canbe realized. The device can reliably realize turning chip breaking and can change the vibration amplitude of cutting of a tool, the vibration amplitude adjustment range of the device is 0 to 0.5 mm (graded speed regulation), and adjustment to appropriate parameters can be realized according to actual specific processing requirements. According to the low-frequency vibration cutting chip breaking device, the rotation speed of a motor is changed by a PWM motor governor, the change of the vibration frequency is achieved, and the frequency adjustment range is 25 Hz to 40 Hz.

The invention discloses a portable beauty apparatus comprising an energy exchange sheet and a liquid storage chamber directly connected with the energy exchange sheet. The portable beauty apparatus also comprises a power supply module, a boosting module and an oscillation module, wherein the power supply module is a battery, and the battery is connected with the energy exchange sheet by the boosting module and supplies power to the energy exchange sheet. The battery is adopted for supplying power, and the boosting circuit drives the energy exchange sheet. The invention has small volume and is convenient to carry.

The invention discloses a plate type valveless piezoelectric pump and a working method thereof. The plate type valveless piezoelectric pump comprises a plate type piezoelectric base body, a flexible rectangular strip, a pre-pressure frame and piezoelectric ceramic sheets; the piezoelectric base body is of a rectangular plate structure, the upper end face is provided with a rectangular groove, andthe lower end face is provided with a flow inlet hole and a flow outlet hole; the pre-pressure frame is of a frame structure with an opening, and the upper inner wall is provided with a convex rectangular structure which is used for pressing the flexible rectangular strip; the four rectangular piezoelectric ceramic sheets are symmetrically arranged on the two sides of the piezoelectric base body;and during working, the flow inlet hole is filled with liquid, same-frequency equal-amplitude electric signals with the phase difference of pi/2 are adopted to excite the four piezoelectric ceramic sheets correspondingly, the piezoelectric base body generates second-order bending vibration and first-order longitudinal vibration, the second-order bending vibration and the first-order longitudinal vibration are coupled to form standing wave motion, a movable cavity is formed at the interface matched with the flexible rectangular strip, and the liquid is transported from the flow inlet hole to the flow outlet hole. The pump has the advantages that the structure is simple, the output flow is high, the backflow can be effectively reduced, and miniaturization can be realized.