194results about How to "Reduce the chance of getting stuck" patented technology

The invention discloses a high-power-to-weight-ratio integrated electromechanical servo actuation device which comprises matched devices like an integrated servo motor, a planet ball screw pair, a rotary coder, a linear displacement sensor and a shell. A motor stator is fixed on a main shell, and the motor stator and a magnetic chip at the tail end of a screw form the integrated servo motor which drives the screw to rotate; a nut converts rotating motion of the screw into linear motion and pushes a load to output linear motion, the linear displacement sensor detects displacement in real time, the rotary coder is used for detecting rotating angle of the screw, and a guide rod can prevent the nut from rotating and plays a role in guiding; a guide ring is mounted in a front shell hole to play a role in guiding and supporting the nut, and the guide ring and a cylinder roller bearing at the rear end of the screw jointly guarantees coaxiality. The high-power-to-weight-ratio integrated electromechanical servo actuation device has the advantages of high power to weight ratio, small size, high transmission efficiency, high loading capacity and high reliability, and novel idea and technical guarantee are provided for development of electric push rods and multi-electrified / full-electrified aircrafts.

The invention provides a high-power-density integrated electromechanical servo actuating device. The high-power-density integrated electromechanical servo actuating device comprises an integrated permanent magnet synchronous motor, a rotor sleeve, a planet roller lead screw pair, a bearing and matched devices such as a sensor. A motor stator is embedded into the inner side of a cylinder body, forms the integrated motor together with a permanent magnet patch attached to the rotor sleeve and drives the rotor sleeve to do rotating motion; the rotor sleeve is fixedly connected to a flange plate through a screw and then drive a lead screw to generate synchronous rotating motion through a key structure arranged on the roller lead screw; the planet roller lead screw pair converts rotating motion of the lead screw into linear motion of a nut; finally, the nut pushes an output rod to do linear motion by taking the liner bearing as a guide of the output rod through a thread formed in the output rod and a lock washer device. According to the high-power-density integrated electromechanical servo actuating device, the problem that an existing electromechanical actuating device is large in size and weight is solved, then the power to weight ratio and loading capacity of the electromechanical actuating device are increased, and a technical support is provided for promoting development of future multi-electrochemical / full-electrochemical air vehicles.

The invention discloses a method for preventing an electronic expansion valve from getting stuck. The method includes the steps that after an air conditioner is started, whether the electronic expansion valve of the air conditioner is reset or not is judged; when the electronic expansion valve of the air conditioner is not reset, the electronic expansion valve is controlled to rotate reversely by a first preset step number for zero setting; and after zero setting of the electronic expansion valve, the electronic expansion valve is controlled to rotate forwards to the initial opening degree for operation, and resetting operation of the electronic expansion valve is completed. The invention further discloses a device for preventing the electronic expansion valve from getting stuck. By means of the method and device, the probability that the electronic expansion valve gets stuck is lowered, quality complaints are reduced, and the product experience is improved.

The invention discloses a driving device of a magic cube solving robot and belongs to the technical field of robots. The driving device comprises a table body, a z-direction clamping mechanism, a z-direction rotating mechanism, an x-direction rotating mechanism, an eccentric clamp, an x-direction reciprocating moving mechanism and a control device. The z-direction clamping mechanism is used for clamping two central blocks on the opposite faces of a magic cube body. The z-direction rotating mechanism is axially connected with the z-direction clamping mechanism. The x-direction rotating mechanism controls rotation of the corresponding faces on the magic cube body through the eccentric clamp. The eccentric clamp cuts into the corresponding faces on the magic cube body by two thirds. The x-direction reciprocating moving mechanism is used for controlling the x-direction rotating mechanism and the eccentric clamp to move together in the x-axis direction in a reciprocating mode. The control device is used for controlling the z-direction rotating mechanism, the x-direction rotating mechanism and the x-direction reciprocating moving mechanism to execute corresponding actions. The driving device enables the magic cube solving robot to have the advantages of being simple in structure, low in cost, little in occupied software and hardware resource, easy to manufacture, produce, apply and popularize and the like, and the driving device is high in action stability and high in recovering efficiency of magic cube solving.

The invention provides an exosome separation method and a separation device thereof. The exosome separation method comprises the steps: firstly filtering or centrifuging blood, urea, saliva, cerebrospinal fluid, milk, ascetic fluid or amniotic fluid to remove impurities larger than 1 micrometer; then utilizing an even pore diameter anodized aluminum oxide film with the pore diameter correspondingto the diameter size of the exosome to filter, collecting filtrate or exosome on the even pore diameter anodized aluminum oxide film to obtain required exosome. The exosome separation device comprisesa membrane filter with the even pore diameter anodized aluminum oxide film as a filter membrane. By means of the separation method and the separation device thereof disclosed by the invention, the exosome can be simply and efficiently separated, the different sizes of exosome can be cut out and classified, and the different sizes of exosome can be respectively and correspondingly analyzed, researched and applied.

The invention discloses a pressure self-balance type electromechanical servo action device under the high-pressure environment. The pressure self-balance type electromechanical servo action device comprises a servo motor, a planet pin roller screw pair, a piston, a speed reducer, a sensor, a shell and other matched devices. The shell is internally fully filled with oil liquid, and the piston can freely move in a piston cylinder. An oil passing hole is reserved in a main shell, and it is guaranteed that oil liquid in the main shell and a front shell flows smoothly. The rotation movement of a screw is converted into the linear movement through a nut, and an output rod is pushed to output the linear movement. A linear displacement sensor is arranged on the main shell, and a magnetic ring is arranged on a guiding block and does the linear reciprocating movement along with a deep groove ball bearing. A high-low lip seal is adopted as a dynamic seal at the position of a copper sleeve, static seals are adopted at other shell connecting parts, and inner and outer liquid mixing is prevented. The pressure self-balance type electromechanical servo action device solves the problems that an existing electromechanical action device is weak in voltage endurance capability, low in efficiency and the like, the power to weight ratio, the voltage endurance capability and the load capability of the electromechanical action device are improved, and a technology guarantee is provided for promoting the development of submarines and underwater devices under the high-pressure environment.

The invention discloses an underwater bottom sealing concrete construction method using a steel truss for reinforcement and belongs to the field of underwater bottom sealing for deep foundation pit construction. The underwater bottom sealing concrete construction method using the steel truss for reinforcement comprises the steps that after a cofferdam is installed or an underground diaphragm wall is constructed, underwater excavation is conducted in a foundation pit till the bottom elevation of bottom sealing concrete is reached; the steel truss is machined piece by piece or integrally on site on land; the steel truss is hoisted and lowered in place integrally or piece by piece; a bottom sealing platform is built, a central collection hopper and a chute are arranged, and a plurality of bottom sealing guide pipes are lowered; mixed concrete is conveyed to the site; tank opening is conducted step by step for head sealing construction, and then normal pouring is conducted; and the bottom sealing guide pipes, the central collection hopper, the chute and the bottom sealing platform are dismounted after bottom sealing is completed, and water pumping is conducted after the strength of the bottom sealing concrete reaches the design strength. By the adoption of the underwater bottom sealing concrete construction method using the steel truss for reinforcement, the reinforcement effect can be achieved, and the thickness of the bottom sealing concrete is reduced, so that the purpose of reducing the construction cost is achieved, the construction difficulty of the underwater bottom sealing concrete can be lowered, and the construction quality and construction safety of the bottom sealing concrete are guaranteed.

The invention belongs to the technical field of automatic vending equipment, and discloses an ascending and descending conveying type automatic vending machine. The ascending and descending conveyingtype automatic vending machine comprises a cabinet body, a cabinet door, a cargo taking device, a cargo discharging device, an ascending and descending conveying device, an operation display module and a refrigeration device, wherein the cabinet body is a support foundation of the automatic vending machine; the cabinet door is hinged to the cabinet body; the cargo discharging device is arranged atthe inner upper part of the cabinet body; different layers can be set according to the cargo selling quantity; the ascending and descending conveying device is positioned in front of the cargo discharging device; commodities pushed out by the cargo discharging device are conveyed to the cargo taking device; the cargo taking device is positioned under the carbon door; a customer completes the cargo taking through the cargo taking device; the operation display module is positioned at the right half part of the cabinet body and is used for completing the man-machine interaction and controlling the cargo discharging; the refrigeration device is positioned at the lower half part in the cabinet body and is used for keeping commodities in the automatic vending machine fresh. The ascending and descending conveying type automatic vending machine provided by the invention has the advantages that the cargo discharging is accurate and stable; the cargo taking is convenient; the installation is simple.

The invention discloses a reaction cup loading device which comprises a base, a hopper arranged on the base, a direction adjusting structure arranged in the hopper, and a lifting mechanism arranged on the base and lifting a reaction cup from the bottom of the hopper to the direction adjusting structure. The direction adjusting structure comprises a direction adjusting groove and a direction adjusting groove cover detachably connected with the direction adjusting groove and covering an opening of the direction adjusting groove, width of the direction adjusting groove is greater than outer diameter of a cup body of the reaction cup and less than outer diameter of a flange of the reaction cup, the direction adjusting groove inclines from one end close to the lifting mechanism to one end away from the lifting mechanism towards the bottom end of the hopper, an outlet for the reaction cup to pass is arranged at one end, away from the lifting mechanism, of the bottom of the direction adjusting groove, the lifting mechanism comprises a lifting groove containing the reaction cup and capable of being communicated with the direction adjusting groove in the hopper, and the lifting groove inclines from one end away from the direction adjusting groove to one end close to the direction adjusting groove towards the bottom end of the hopper. By using the reaction cup loading device, convenience is brought to solve the fault of pipe jamming, and lowering of using efficiency of a detection instrument due to solving of the fault of pipe jamming is avoided.

The invention discloses an electronic expansion valve which comprises a valve cover (1), a magnet rotor assembly (2), a screw sleeve (3), a check ring guide rail (4), a check ring (5), a screw sleeve pressing plate (6), a valve needle assembly (7), a flow equalization device (8), a valve body (9), a valve deck (10), a filter screen (11), a lead-out pipe (12) and a lead-in pipe (13). The magnet rotor assembly (2) is arranged in the expansion valve, the upper end of the valve needle assembly (7) penetrates through and is welded together with a central hole of the magnet rotor assembly (2), the valve needle assembly (7) is sleeved with the screw sleeve (3) and can only do axial movement, and the screw sleeve (3) is embedded in and presses the flow equalization device (8). By means of the electronic expansion valve, the magnet rotor installation and fixation procedures can be reduced, machining cost can be reduced, impact which is exerted on a valve needle by flow can be effectively reduced, noise can be effectively lowered, and a valve opening can be effectively protected. By means of the electronic expansion valve, reliability and stability can be improved, the service life can be prolonged, and noise in the valve can be effectively lowered.

The invention relates to a shale gas horizontal well staged fracturing method and a shale gas horizontal well completion method. The shale gas horizontal well staged fracturing method comprises that step 1: the lower production layer in the well is perforated and fractured; step 2: the lower production layer is subjected to setting; step 3: the upper production layer in the well is perforated and fractured; step 4: the upper production layer is subjected to setting; the step 3 and the step 4 are repeated until the fracturing construction of the horizontal well is completed. By employing the shale gas horizontal well staged fracturing method, shale gas reservoirs can be effectively reconstructed, and network fractures having effective flow conductivity are formed.

The invention discloses a hydraulic hole opener and a hole opening method. The hydraulic hole opener comprises an upper connector 1, the upper connector is connected with the upper end of a body 7 through threads, the lower end of the body is connected with a lower connector 22, an upper ball seat 4 is arranged in the upper connector and is connected with the upper connector through a dowel pin 3, three cutter wing grooves distributed in 120 degrees are formed in the body, a cutter wing 11 is arranged in each cutter wing groove, a mandrel 9 is arranged in the body, a piston 15 sleeves the bottom of the mandrel, a retainer ring 12 is arranged at the top of the piston, and hole opening operation is finished by pushing the cutter wings to expand outwards through the retainer ring. The hole opener is simple in structure, convenient to disassemble and capable of folding the unfolded cutter wings forcedly. Reliability of the cutter wings can be improved by changing a mud channel, cutter wing blocking possibility is reduced, cutter wing deformation is small, and the service life of the cutter wings and the body are prolonged. The safety of the hole opener is greatly improved, and the drill blocking problem caused by the fact that the cutter wings cannot be folded due to fault is solved.

The invention discloses a down-the-hole hammer reverse circulation pipe-following drill bit suitable for large-diameter drilling. The down-the-hole hammer reverse circulation pipe-following drill bitcomprises an upper drill bit body and a lower drill bit body, wherein the lower drill bit body is hung on the lower part of the upper drill bit body, central channels are formed in the middle part ofthe upper drill bit body and the middle part of the lower drill bit body, a groove is formed in the lower part of the upper drill bit body, a raised shaft is arranged at the top end of the lower drillbit body, the shape of the groove corresponds to the shape of the raised shaft, the raised shaft is inserted in the groove, the hole diameter of the groove is larger than the outer diameter of the raised shaft, the raised shaft can slide in the groove, and when the raised shaft slides and abuts against one end of the groove, the bottom of the lower drill bit body moves out of the outer edge of adrilling tool to realize reaming drilling. The down-the-hole hammer reverse circulation pipe-following drill bit has the beneficial effects that downhole double slag suction channels are arranged andmatched with involute type slagging guide grooves in the bottom surface of the drill bit, the reverse circulation efficiency is high, impact energy efficiency of a down-the-hole hammer is high, the slagging effect is good, meanwhile, ball teeth on the edge of the bottom surface of the drill bit are densely arranged, and the service life of the drill bit is effectively prolonged in combination withgood slagging conditions.

The invention discloses a medium transmission device, which comprises a client portion having a banknote depositing and withdrawing port, a banknote checking portion for identifying banknotes, a temporary storage portion for keeping the banknotes temporarily, a switching blade for switching the transmission direction of the banknotes, a banknote box for accommodating the banknotes, a first transmission channel connected with the client portion and the banknote checking portion, a second transmission channel connected with the banknote checking portion and the temporary storage portion, and a third transmission channel connected with the banknote checking portion and the banknote box. A transmission O portion is arranged at one side of the client portion and one side of the banknote checking portion; an arc transmission channel is formed in the peripheral surface of the transmission O portion; and the temporary storage portion is abutted against the transmission O portion, and the temporary storage portion is uniformly provided with a plurality of press rollers for applying uniform pressure to the transmission O portion. The medium transmission device ensures the banknotes have appropriate and effective transmission power and stable and consistent transmission speed in the transmission channel, thereby reducing probability of that the banknotes block the transmission channel and are blocked in the arc transmission channel, and ensuring normal transmission of the banknotes and utilization rate of the machine equipment.

The invention provides a disk-based data writing method, a disk-based data writing device and terminal equipment, and the method comprises the steps: writing to-be-written data of a to-be-written diskinto a first memory block in a memory area of the terminal equipment when the to-be-written data of the to-be-written disk is obtained; judging whether the first memory block is fully written with data to be written into the disk or not; if it is confirmed that the first memory block is not fully written with the data to be written into the disk, writing the obtained data to be written into the disk into the remaining storage space of the first memory block again, and then returning to execute and judge whether the first memory block is fully written with the data to be written into the diskor not; and if it is determined that the first memory block is filled with the data to be written into the disk, writing the data to be written into the disk stored in the first memory block into thedisk by adopting a direct IO access method. The technical problem that a traditional disk writing mode easily causes system jamming can be solved to a certain extent.

The invention relates to a star-shaped discharging valve with a protecting structure. The star-shaped discharging valve with the protecting structure comprises a shell, a rotor and a flange cover, wherein the rotor comprises a rotating shaft; a plurality of blades with U-shaped cross sections are arranged on the periphery of the rotating shaft; circular side plates are arranged at the left side and right side of each blade; an expansion sleeve matched with the rotating shaft is arranged in the center of each side plate; a buffering cavity is arranged between each side plate and the flange cover; a cylindrical inner protecting sleeve is arranged in the buffering cavity; a cylindrical upper protecting sleeve is arranged at the outer side of the inner protecting sleeve; a cylindrical lower protecting sleeve is arranged at the inner side of the inner protecting sleeve; a mounting hole matched with the rotating shaft is arranged in the center of the flange cover; and a shaft sleeve matched with the expansion sleeve is arranged at the outer side of the mounting hole. The star-shaped discharging valve with the protecting structure has the beneficial effects that dust and powdery materials on the discharging valve are convenient and fast to clean through matching of an air bag and a hairbrush layer under the multiple protection effect of a material blocking plate, the upper protecting sleeve, the lower protecting sleeve, the inner protecting sleeve and the shaft sleeve, the cleaning efficiency is high, the implementation effect is good, the rotor is prevented from being locked up, and the service life of equipment is prolonged.

The invention relates to the technical field of municipal equipment, and discloses a buoyancy type self-cleaning flood gate for an underground garage. The buoyancy type self-cleaning flood gate comprises a door frame, a floating gate body, a buoyancy cavity and a flood discharge cavity. The door frame is movably connected with the floating gate body, the floating gate body is arranged in the buoyancy cavity, and the buoyancy cavity communicates with the flood discharge cavity. According to the buoyancy type self-cleaning flood gate for the underground garage, when there is a light rain and water flow is relatively slow, the buoyancy cavity is a closed space, and a sediment accumulation phenomenon cannot occur. When there is a heavy rain, the floating gate body is triggered to stretch out to block water, one-time high-pressure water column cleaning can occur, so that less silt is accumulated at the bottom of the buoyancy cavity all the time, and it is ensured that the floating gate bodycan stretch out and draw back normally so as to guarantee normal passing of a vehicle. In addition, an inflation air bag carries out sealing protection on the top of the floating gate body, the siltand garbage are prevented from blocking the floating gate body, the force effect of the vehicle on the floating gate body is reduced, and location deformation of the floating gate body is reduced.

The invention discloses a shock-proof mechanical magnetic lock, comprising an iron plate (211), a pulling plug (212), a magnet (221), a sleeve (222) and a stop ring (223), wherein the iron plate (211) is arranged at one side; the pulling plug (212) is vertically protruded from the iron plate (211); the magnet (221) is arranged at the other side; the sleeve (222) is arranged inside the magnet (221), and the pulling plug (212) can be inserted into the opening on the top of the sleeve (222); and the stop ring (223) is sleeved at the periphery of the sleeve (222); the stop ring (223) is fixed on the magnet (221); the sleeve (222) is installed on a baseplate (226) under the magnet (221) by a connecting piece (227); the magnet (221) and the stop ring (223) can make axial movement relative to the sleeve (222); and a spring (229) is arranged between the sleeve (222) and the stop ring (223). Through the improved structure, the service life, the shock resistance and the safety of the lock body are improved; and through the structure of the opening on the top of the sleeve (222), locking probability of internal balls is reduced and the cost of processing and assembly is lowered.

The invention relates to a numerical control drilling machine with a cooling liquid recycling and scrap cleaning function. The numerical control drilling machine comprises a base, a bracket, a power device and a drill and also comprises a scrap removal mechanism and a circulation mechanism, wherein the scrap removal mechanism comprises a rotary plate, a gas transmission hole, a supporting ring, anannular slot, two power components and at least two lugs, wherein the power component comprises a sealing barrel, a sealing casing pipe, a spring, a piston block, a first check valve, a second checkvalve, a movement rod, a third pipeline and a fourth pipeline; and the circulation mechanism comprises a groove, a second pipeline, a filtering net, a first pipeline and a nozzle. In the numerical control drilling machine with the cooling liquid recycling and scrap cleaning function, through the scrap removal mechanism, scraps in a workpiece drilling hole can be removed, a possibility that the drill and a workpiece are stuck is lowered, a fault rate of the numerical control drilling machine is lowered, the cooling liquid can be recycled through the circulation mechanism, the loss of the cooling liquid is reduced, and the production cost of the numerical control drilling machine is lowered.

The dish washer of this invention can switch reliably the washing paths even the foreign matters such as leftovers etc., has been flowed into the water dividing means. The dish washer of this invention is provided with a water dividing means (37) that switches the rinsing means (27) for supplying rinsing water. The dividing means (37) has a casing (40) and a valve body (41) installed rotatably in the casing (40). The casing (40) has a plurality of outlets (39) that communicate respectively with the rinsing means (27). The outlets (39) are switched to supply rinsing water by means of rotation of the valve body (41), and the valve body (41) is configured to be movable to separate from the surface opposite to the outlets (39).

The invention provides a residue cleaning and defective product screening device for hexagonal nut production, and relates to the technical field of part machining. The problems that a defective product left in a screening box after screening is easily clamped in a screening hole and is inconvenient to take out quickly for collection, and high-frequency fine vibration cannot be synchronously realized in the up-down vibration process through structural improvement are solved. The residue cleaning and defective product screening device for hexagonal nut production comprises a main body seat andstress blocks, and a sliding structure is welded on the main body seat. A shifting block B is welded with two sliding seats B, and the bottom end surface of the shifting block B is in contact with thebottom end surface of a screening box body; and the front end face of the shifting block B is of an inclined structure, and the inclination angle is 60 degrees, so that when the shifting block B moves along with the sliding seats B and a cleaning block for cleaning, the shifting block B can jack back a nut partially exposed out of the screening hole through the inclined face of the front end face, and thus the phenomenon that the cleaning block is stuck in the moving process is avoided.

The invention relates to a one way valve of a manual oil pump, which comprises a valve plate, a spring, a valve seat with a through valve hole and an outer cover connected with the valve seat; the valve plate and the spring are sequentially positioned between the valve seat and the outer cover; the valve plate is in sealed fit with the valve seat through the spring; and at least one flow passage communicated with the through valve hole is arranged on the outer cover. After the structure is used, the one way valve is used as an independent component and is wholly pressed in the inner end of an oil inlet passage and the other end of an oil outlet passage close to a cavity; sealing positions are totally in the one way valve; two ends can place the one way valve so as to have little metalworking difficulty in the oil inlet passage and the oil outlet passage; in addition, the return of the valve plate depends on the action of the elastic force of the spring in order that the valve plate can be obliquely positioned and has reliable return; and the one way valve has good sealing effect. Therefore, in the using process of a diesel oil-water separation precipitator, the working reliability of the manual oil pump is improved to ensure continuous normal operation of the manual oil pump and bring convenience for a user to use.

The invention relates to the technical field of biscuit baking, in particular to efficient continuous automatic biscuit baking equipment which comprises a baking oven, a plurality of trays and a plurality of supporting frames. Trays containing biscuits are sequentially placed on the bearing frames in the baking oven through the material moving assembly, the driving assembly drives the two conveying assemblies to operate at the same time, all the bearing frames are driven to move up and down in the baking oven through the conveying assemblies on the two sides of the baking oven, and therefore the trays placed on the bearing frames are driven; according to the cookie baking device, the tray moves up and down in the baking oven, cookies on all the trays can be evenly heated and dried in the up-and-down moving process, the baking quality of the baking oven is improved, the baking efficiency is improved, the baked cookies are taken down from the bearing frame through the material moving assembly, and the baked trays are transported away; therefore, the biscuits can be continuously baked, and the efficiency of producing the biscuits is improved.

The invention provides bench drilling equipment for multi-station machining of a non-mounting and dismounting drilling bit and relates to the field of drilling machines. The bench drilling equipment solves the problems that the drilling bit is poorer in adjustability, machining of multiple holes by a single arrangement method can be achieved, and a fixture is easily stuck by residue in a moving process. The bench drilling equipment for the multi-station machining of the non-mounting and dismounting drilling bit comprises a base structure, wherein four fixture fixing seats are slidingly connected onto the base structure; and a sliding rail is fixedly connected with the central position of the rear side of the top end face of the base structure through bolts. The equipment is provided with an adjustment structure, a transmission structure and a drilling bit fixing seat; first, distance adjustment of the transmission structure can be achieved with the adoption of adjustment holes; second,an angle of the transmission structure can be adjusted with the adoption of positioning bolts; third, due to the arrangement of cylindrical pipes and connecting rods, extension lengths of the cylindrical pipes and the connecting rods are adjusted by screwing adjustment bolts, so that gears can be engaged with bevel gears; and normal transmission is ensured.

The invention discloses an automatic copper column pressing machine. Copper columns are conveyed through a multi-layer feeding pipe and air pressure power. Conveying of the copper columns is completed without gravitational potential energy, and accordingly the distance between a vibration disc and the ground is reduced, and meanwhile the probability that the copper columns are stuck in a feeding pipeline can be lowered. The automatic copper column pressing machine comprises a control module, a mobile module, a feeding module and a copper column pressing machine head. The feeding module is a multi-layer pipe feeding device. The control module is connected with the mobile module, the feeding module and the copper column pressing machine head. The mobile module is connected with the copper column pressing machine head and the feeding module and is used for moving the copper column pressing machine head and copper column parts to be pressed. The multi-layer pipe feeding device is connected with the copper column pressing machine head and is used for conveying the copper columns to the copper column pressing machine head. The copper column pressing machine head is used for tamping the copper columns to the copper column parts to be pressed.

A windscreen wiper device (1) comprising an elastic, elongated carrier element, as well as an elongated wiper blade (2) of the flat blade type, a mounting head (10) for transferring a reciprocal movement to said wiper blade (2), as well as a connecting device (7) for an oscillating arm (8) with the interposition of a joint part (9), wherein said joint part (9) comprises at least one resilient tongue (15) engaging in a correspondingly shaped hole (16) provided in said oscillating arm (8), wherein said oscillating arm (8) has an U-shaped cross - section at the location of its connection to said joint part (9), with the special feature that said oscillating arm (8) and said joint part (9) are interconnected by introduction of said joint part (9) inside the U-shaped cross - section of said oscillating arm (8) at a location between the hole (16) provided in said oscillating arm (8); and said mounting head (10).

The invention provides an electric pressure cooker allowing a lid to be opened and closed through buttons. The electric pressure cooker comprises a cooker body and the lid. The lid is provided with an opening and closing mechanism driven by a control mechanism to open and close the lid. The opening and closing mechanism comprises a first buckling strip, a second buckling strip, a first connection strap and a second connection strap, the first buckling strip and the second buckling strip are arranged on the outer edges of the two sides of the lid respectively, one end of the first connection strap is connected with the first buckling strip, the other end of the first connection strap is provided with a first toothed bar, one end of the second connection strap is connected with the second buckling strip, the other end of the second connection strap is provided with a second toothed bar, both the end, provided with the first toothed bar, of the first connection strap and the end, provided with the second toothed bar, of the second connection strap are located in the middle of the lid, a buckling platform is installed at the upper end of an outer cooker, and both the first buckling strip and the second buckling strip can be connected with the buckling platform of the outer cooker in a buckling mode. The control mechanism comprises a support and a swing plate, the support is installed in the middle of the lid, the swing plate is installed on the support and provided with a first gear and a second gear, and the first gear and the second gear are meshed with the first toothed bar and the second toothed bar respectively. According to the electric pressure cooker, by the adoption of the transmission mode that the gears are meshed with the toothed bars, transmission is reliable, acting force for enabling the swing plate to swing is small, and the jamming probability is very low.

The invention relates to the technical field of dredging equipment, and discloses a pipeline dredging device for municipal engineering. The pipeline dredging device comprises an advancing bin, a rotating shaft is rotatably connected to the right side face of the advancing bin, a cleaning device is arranged on the right side of the rotating shaft, driving wheels are arranged on the periphery of the outer surface of the advancing bin, a water tank is arranged inside the advancing bin, the right side of the water tank communicates with a water pump, and multiple spray heads are arranged on the outer surface of the advancing bin and communicate with the output end of the water pump. According to the pipeline dredging device for the municipal engineering, a first push rod motor, a sliding column, a sealing box, a second push rod motor and a rectangular column are used in cooperation, so that the first push rod motor adjusts the position of a driving wheel through the sliding column, the second push rod motor adjusts the cleaning position of a brush through the rectangular column, and therefore, the device can be used for dredging the pipelines with different calibers, and the applicability of the device is further improved.