64results about How to "Solve the lack of suction" patented technology

Systems and methods for pumping milk from a breast, wherein the milk is expressed from the breast under suction and milk is expulsed from the pumping mechanism to a collection container under positive pressure.

A fuel-filtering device is disposed inside a fuel tank for filtering a fuel. The fuel-filtering device includes a filter body having a bag shape and a communication hole, and is formed of a plurality of laminated filter layers. The laminated filter layers includes an outside filter layer formed of a woven mesh, an inside filter layer formed of a non-woven fabric, and at least one intermediate filter layer disposed between the outside filter layer and the inside filter layer and formed of a non-woven fabric. The filter body is formed of at least one of a polyethylene fiber and a polypropylene fiber and has mesh sizes decreasing from the outside filter layer toward the inside filter layer.

A cleaning nozzle assembly of a vacuum cleaner. The cleaning nozzle assembly includes: a lower case having a main inlet and a lower sub-inlet to guide foreign substances and air to be introduced into the lower case, wherein the lower case is open at an upper side thereof and includes a partition wall isolating the main inlet from the lower sub-inlet and having a connection hole; an upper case coupled to the lower case to cover the open upper side of the lower case; and an inflow setting unit setting inflow of foreign substances and air into the lower case through the lower sub-inlet and an upper sub-inlet by opening / closing the connection hole. The cleaning nozzle assembly can switch inlets of a cleaning nozzle receiving air and foreign substances, thereby selectively providing dust suction over a wider area and intensive dust suction, can prevent noise from being generated by wheels of the cleaning nozzle, and allows the cleaning nozzle to remain horizontal with respect to a floor when a transfer pipe provided to the cleaning nozzle for changing a cleaning location during cleaning is lifted up.

The invention relates to the technical field of clutches, and particularly relates to a tooth embedding type electromagnetic clutch. The tooth embedding type electromagnetic clutch comprises a movingtooth sleeve and a fixed tooth sleeve which are engaged with each other to realize transmission, wherein a fixed armature sleeves the outer side of the fixed tooth sleeve; a gap with fixed position isformed between the fixed armature and the fixed tooth sleeve; a movable armature rotatably sleeves the outer side of the movable tooth sleeve and can axially move along with the movable tooth sleeve;after an electromagnetic coil is charged, the movable armature is sucked to the fixed armature, so that the movable tooth sleeve and the fixed tooth sleeve are engaged with each other. The inventionprovides an electromagnetic clutch system which is compact in structure, does not need an assistant performing structure, and is convenient to operate; the electromagnetic clutch system is applicableto an electric driving system of a new energy vehicle; and system is capable of controlling the transmission and cutting off of power torque.

The invention discloses a tray structure of a photoresist homogenizer. The tray structure comprises a silicon wafer bearing table and a vacuum wafer suction structure, wherein a silicon wafer bearing plane is arranged at the top end of the silicon wafer bearing table; a photoresist storage groove is formed inwards along the center of the silicon wafer bearing plane; the groove wall of the photoresist storage groove is shaped like an inwardly-concave circular arc; a circular-truncated-cone-shaped boss is arranged in the middle of the photoresist storage groove; the vacuum wafer suction structure comprises an upper end and a vacuum wafer suction opening; the vertical distance between the vacuum wafer suction opening and the silicon wafer bearing plane is greater than 3mm. Through the mode, photoresists can be effectively prevented from being sucked into the vacuum wafer suction opening through the tray structure of the photoresist homogenizer, so that insufficient suction force or blocking of the vacuum wafer suction opening, caused by suction of the photoresists, is avoided; meanwhile, owing to the large-capacity photoresist storage groove, a large number of photoresists which are thrown away can be stored, and the photoresists flowing into the photoresist storage groove are prevented from being thrown away again, so that a photoresist homogenizing table is prevented from being damaged.

The invention discloses a horizontal drainage plate combined geotextile vacuum preloading method sludge treatment system. The horizontal drainage plate combined geotextile vacuum preloading method sludge treatment system comprises a mud pit, transverse drainage plates, geotextile, a pumping and draining pipeline and a vacuumizing device; the mud pit is filled with sludge; the transverse drainage plates are transversely distributed in mud in the mud pit layer by layer; geotextile is correspondingly arranged on each layer of the transverse drainage plates in an attached mode, the geotextile is formed by needling or weaving synthetic fibers; vertical main pipes are vertically arranged at the positions, close to the two opposite side walls of the mud pit, in the mud pit, and the vertical mainpipes are connected with the transverse drainage plates through transverse branch pipes. The invention further provides a construction method of the system. The horizontal drainage plate combined geotextile vacuum preloading method sludge treatment system and the construction method are higher in drainage efficiency and wider in coverage range.

A low-energy-consumption rotation driving apparatus for a satellite-borne microwave switch is disclosed. The low-energy-consumption rotation driving apparatus comprises first driving magnetic steels (6) and the like; a rotor spacer (5) is fixed on the upper surface of a circular disc at the bottom of a rotor shaft (4); the first driving magnetic steels (6) and second driving magnetic steels (7) are connected with the rotor spacer (5) and are mounted in a groove in the circular disc at the bottom of the rotor shaft (4); a first reed driving rod (9) is mounted in the middle of a first reed (10), and perpendicular to the first reed (10); first reed magnetic steel (8) is mounted in the first reed driving rod (9); a second reed driving rod (12) is mounted in the middle of a second reed (13), and perpendicular to the second reed (13); second reed magnetic steel (11) is mounted in the second reed driving rod (12); and a first reed group (2) or a second reed group (3) is arranged under each first driving magnetic steel (6) or each second driving magnetic steel (7) respectively. According to the low-energy-consumption rotation driving apparatus, the energy consumption of the microwave switch driving system is lowered, and the operating stability of the microwave switch is improved.

The invention discloses a dust collector and a dust collector shell with retaining ribs. The dust collector shell with retaining ribs comprises an upper arc plate, side vertical plates and the retaining ribs; the upper arc plate refers to a single curved plate covering a roll brush; the side vertical plates are arranged at two shaft ends of the roll brush, and refer to flat plates connected with the upper arc plate perpendicularly; the retaining ribs extend from the lower surface of the upper arc plate downwards vertically and include a first retaining rib and a second retaining rib, the firstretaining rib and the second retaining rib are respectively perpendicularly connected with the side vertical plates on two sides of the upper arc plate, and a gap for air flowing is formed between the first retaining rib and the second retaining rib. Besides, the first retaining rib and the second retaining rib divide the space below the upper arc plate into a reflow cavity and a roll brush cavity for accommodating the roll brush, and the space of the roll brush cavity is greater than that of the reflow cavity. Based on low cost for improvement, change of air flow to the roll brush during dust collection is changed, disturbance of air flow is enhanced, and thus dust collection efficiency is improved while dirt on brush hair can be removed.

The invention discloses a multi-scanning-driving-shaft movable polygon-prism light-path directly-writing device, and belongs to the technical field of directly-writing exposure. According to the multi-scanning-driving-shaft movable polygon-prism light-path directly-writing device, a vacuum suction cup structure is mainly improved, and the problem that when a small plate is produced, insufficient absorption force is caused by air leakage is solved. Further, as air holes in the suction cup are distributed in the mode that the middle is thin, and the periphery is thick, the problem that edge of the plate is cocked is effectively solved, the number of the air holes is saved, and the cost is reduced. By means of the multi-scanning-driving-shaft movable polygon-prism light-path directly-writing device, an extra-large plate can be produced; the lower portion of the suction cup is connected with a plurality of moving assemblies, moving shafts of the multiple moving assemblies synchronously move, and the exposure accuracy and the operating stability are improved. Meanwhile, the accurate image exposure position can be guaranteed by improving the partition para-position focusing method, and image exposure is clear.

The invention provides a turntable vacuum filter device which comprises a filter device main body and a built-in gas liquid separation device. The turntable vacuum filter device is characterized in that the filter device main body comprises a washing device, a filter disc, a feed device and a discharge device, wherein the filter disc, the feed device and the discharge device are respectively connected with the built-in gas liquid separation device which is connected with a vacuum system and a front liquid seal device by pipelines, and the front liquid seal device is connected with a liquid drainage pump and a rear liquid seal device in sequence by pipelines. According to the turntable vacuum filter device, the mounting height is low, the height of a workshop is only required to be about 10 meters, more than 50% of civil engineering cost is lowered, and as the height of the disc face is lowered, a slurry groove is higher than the disc face, the slurry can flow to the disc face under the action of gravity, no charge pump is needed, the energy consumption is saved, and the equipment cost and the maintenance cost are both reduced.

A laser processing apparatus has a suction unit for suctioning debris. The suction unit includes a debris trapping chamber and a cleaning unit for cleaning the inside of the debris trapping chamber. The cleaning unit includes a shutter for closing an opening of the debris trapping chamber and a cleaning water supply port for supplying cleaning water to the debris trapping chamber when the opening thereof is closed. The shutter closes the opening of the debris trapping chamber, the suction unit exerts a suction through the suction port, and cleaning water is supplied from the cleaning water supply port to the debris trapping chamber and suctioned through the suction port to clean the inside of the debris trapping chamber.

The invention relates to a silicon-chip mechanical arm, and the silicon-chip mechanical arm comprises a mechanical arm, wherein one end of the mechanical arm is connected with a sliding guide rail; a vacuum adsorption-type claw which is connected with the other end of the mechanical arm; vacuum chucks which are located on the vacuum adsorption-type claw; and a controller which can change the position of the mechanical arm and control the working of the vacuum chucks. The silicon-chip mechanical arm also comprises a temperature sensor which is disposed on the mechanical arm and enables a detected temperature signal to be transmitted to the controller. The number of the vacuum chucks is not less than two. When the mechanical arm is used for grabbing a chip, the mechanical arm can reduce the breakage rate of silicon chips, improves the qualified rate of the surfaces of the silicon chips, also improves the effect that the vacuum adsorption-type claw grabs the silicon chips, and avoiding a problem of insufficient absorption force caused by lower degree of vacuum.

The invention relates to a bistable permanent magnetic mechanism. The bistable permanent magnetic mechanism comprises an outer magnet yoke and a mandrel arranged in the center of the outer magnet yoke, the mandrel is made of non-magnetically conductive material, two unconnected movable iron cores are symmetrically arranged on the circumference of the mandrel, both a closing pole and an opening pole are arranged are arranged on an inner wall of the outer magnet yoke corresponding to two sides of each of movable iron cores, both the closing poles and the opening poles are provided with working faces capable of being attracted to the movable iron cores and are wound by closing coils and opening coils for driving the movable iron cores to perform reciprocating motion between the closing poles and the opening poles, permanent magnets which always correspond to outer side faces of the movable iron cores in the movement process thereof are arranged on the inner wall of the outer magnet yoke, and the permanent magnets separate the movable iron cores from the inner wall of the outer magnet yoke. In the bistable permanent magnetic mechanism, permanent magnetic flux generated by the permanent magnets is not shorted by the outer magnet yoke, and the movable iron cores are ensured to have enough magnetic flux passing through the working face of the closing poles or the opening poles, thereby ensuring the movable iron cores to be kept in locking positions of the closing poles or the opening poles, and ensuring reliability of closing or opening operation.

The invention discloses a vehicle wireless charging module configured to disassemble, assemble and locate. The vehicle wireless charging module comprises a wireless charger and a support; the wirelesscharger comprises a shell, a power source, a magnet and a coil, the shell is internally provided with a mounting cavity, and the power source, the magnet and the coil are arranged in the mounting cavity; the magnet is arranged at the outer sides of the power source and the coil; the support comprises a front support and a mounting component configured to install the support, and the front supportis connected with the mounting component; the front side of the front support is provided with a location concave portion, and the front support is provided with a taking and placing operation port penetrating the location concave portion and the outer side; the front support is provided with a magnetic attracting piece corresponding to the location concave portion; the wireless charger is detachably and adaptively located at the location concave portion, and the magnetic attracting piece and the magnet are mutually magnetically attracted, and therefore, through the magnetic attracting disassembling and assembling design of the wireless charger and the support, the wireless charger is put into the location concave portion for magnetic attracting location, the location between the wirelesscharger and the support is stable and firm, especially, when the vehicle wireless charging module is used in a vehicle, it is avoided that the wireless charger is fell off to cause falling and damaging of the wireless charger and a mobile phone, and the wireless charger can be taken off by directly taking away the wireless charger from the taking and placing operation port, the operation is convenient.

The invention discloses a dual-power supply electromagnetic brake, which comprises a brake body and a power supply module for supplying power for the brake body; the brake body comprises a yoke in which coils are arranged, a braking part, an armature and an elastic part, wherein the armature is located between the braking part and the yoke, and the elastic part is arranged on one face, opposite to the armature, of the yoke; the power supply module comprises a dual-power supply module, a voltage switcher and a time delay controller, wherein the dual-power supply module is capable of supplying two different voltages, the voltage switcher is electrically connected with the dual-power supply module, and the time delay controller is electrically connected with the voltage switcher; the dual-power supply module is used for supplying a high power supply to the brake body when the brake body is powered up so as to power up the coils in the brake body to pull in the armature; the time delay controller is used for sending out a switching signal to the voltage switcher after being powered up and delayed for a preset time; and the voltage switcher is used for performing switching according to the switching signal of the time delay controller to supply power for the brake body after the high power supply of the dual-power supply module is switched into a low power supply.

The invention discloses a DMD structure XY multi-shaft movable optical path direct writing exposure machine, and belongs to the technical field of direct writing exposure. According to the DMD structure XY multi-shaft movable optical path direct writing exposure machine, mainly the structure of the vacuum suction disk is improved, such that the problem that the suction is insufficient due to the gas leakage during the production of the small plate is effectively solved; and further the gas pores are sparsely distributed in the middle of the suction disk and are densely distributed on the periphery of the suction disk, such that the problem of the plate edge warpage is effectively eliminated, the number of the gas pores is saved, and the cost is reduced. According to the present invention,with the DMD structure XY multi-shaft movable optical path direct writing exposure machine, the 55-inch super-large plate can be produced; the two groups of the movement assemblies are respectively connected to the left side and the right side below the suction disk, and the movement shafts of the two groups of the movement assemblies synchronously move so as to improve the exposure precision andthe operation stability; and by improving the partition alignment focusing method, the accurate image exposure position and the clear image expose can be ensured.

An apparatus for generating a vortex in a collection vessel of a vacuum cleaner, using a blade assembly rotatably mountable in the collection vessel. By rotating the blade assembly, a vortex is generated inside the collection vessel, and enough suction is created to draw air through the entire system. The use of a blade assembly to generate the vortex may remove the need for an impeller external to the collection vessel, as the blade assembly may be capable of creating enough suction to draw air into the collection vessel. This may allow the vacuum cleaner to operate with lower noise.

The invention provides a low-noise relay, which mainly comprises a base, an L-shaped yoke, an armature, a bobbin, a coil, an iron core, a movable contact spring, a fixed contact spring, a movable contact and a fixed contact, wherein a magnetic limiting groove is formed in the lower part of a vertical side of the L-shaped yoke; the iron core is in a stepped form; the axis diameter of one end, far away from the armature, of the iron core is the smallest; and the axis diameter of one end, close to the armature, of the iron core is the biggest. When the coil is electrified, magnetic flux generatedby the coil passes through the magnetic limiting groove and the stepped iron core, so that the electromagnetic force of the relay in later pickup can be greatly reduced on the premise of ensuring that the relay has enough electromagnetic force in early pickup through the magnetic flux path, thereby effectively reducing the noise of the relay at work.