282results about How to "Save installation space" patented technology

The invention relates to a mobile electronic lock comprising a lock body and a fixed part movable relative to the lock body between a closed position and an open position, the lock body comprising an electromechanical locking device comprising a motor with a rotor, a latch coupled to the rotor and a control circuit. The latch can be power driven by the electric motor from a locked position, in which the fixed part in the closed position is locked to the lock body, to an unlocked position, in which the fixed part is released to move to the open position. The latch can be mechanically driven by moving the fixed part from the open position to the closed position, wherein the latch is drivingly coupled to the rotor of the electric motor such that the mechanical driving of the latch brings about a forced rotational movement of the rotor. The control circuit is designed to detect the forced rotational movement of the rotor.

This utility model provides a mold that utilizes the mold opening force of an injection molding machine to drive the ejection mechanism of the molded product. It relates to the field of mold technology and includes a movable side, a fixed side, an ejection mechanism, and a driving mechanism. The driving mechanism includes a pull plate, a rocker arm, a guide structure, and a rotating shaft. The pull plate is installed on the movable side, and the rocker arm is connected to the ejection mechanism via the rotating shaft. A guide pin guides the rocker arm. Both the pull plate and the rocker arm are equipped with hook structures. This design, by using a driving mechanism composed of a pull plate, rocker arm, guide structure, and rotating shaft, offers a simple and reliable structure with minimal installation space, reducing mold and injection molding costs. After the mold completes the ejection action, the rocker arm can disengage from the pull plate, allowing the movable side to continue performing larger mold opening actions, meeting the needs of a robotic arm to enter the mold and remove the product. The mold opening stroke is not affected by the mold thickness.

The embodiment of the application discloses a high-pressure fan system for new energy engineering machinery, and belongs to the technical field of high-power equipment thermal management. The system comprises: a high-pressure fan; a driving motor, which is in transmission connection with the high-pressure fan; a motor controller, which is electrically connected with the driving motor, is used for driving the driving motor and adjusting the rotating speed of the high-pressure fan; a control module, which is in communication connection with the motor controller, is used for sending a rotating speed control instruction to the motor controller; a high-voltage power supply circuit, which has an input end connected with a whole vehicle high-voltage bus and an output end connected with a power input end of the motor controller, provides high-voltage direct current to the motor controller; and a low-voltage auxiliary power supply circuit, which has an input end connected with a whole vehicle low-voltage power supply and an output end connected with the control module, provides low-voltage direct current to the control module. Based on the system, the low-voltage system load and overload risk can be reduced, a single fan can meet the whole vehicle heat dissipation demand, the configuration quantity and space occupation are reduced, and the heat dissipation efficiency is improved.

The application relates to the engine technical field and discloses an integrated brake rocker arm which comprises a rocker shaft, a lubricating oil channel and a brake oil channel are arranged in the rocker shaft and penetrate the rocker shaft in the axial direction, an electromagnetic valve seat is arranged on the rocker shaft, a high-pressure cavity which is communicated with the lubricating oil channel and the brake oil channel is arranged in the electromagnetic valve seat, an electromagnetic valve which is used for controlling the on-off of the lubricating oil channel and the brake oil channel is arranged in the high-pressure cavity of the electromagnetic valve seat, a plurality of air inlet rockers and exhaust brake rockers are further arranged on the rocker shaft, the air inlet rockers and the exhaust brake rockers are communicated with the lubricating oil channel, the exhaust brake rockers are further communicated with the brake oil channel, and the air inlet rockers and the exhaust brake rockers are arranged in an interleaved and spaced mode. The application integrates the conventional valve rocker and the exhaust brake rocker, cancels the split independent arrangement structure, effectively reduces the installation and arrangement space, and is higher in the integrated degree of the whole machine; and the brake hydraulic medium is realized in the built-in type transmission, the external pipeline is less, and the risk of easy wear and leakage of the external oil pipe is avoided.

The invention relates to the technical field of electrical equipment, and discloses a GIS circuit breaker mounting and docking device which comprises a bottom frame, turnover assemblies are fixedly mounted at the left end and the right end of the bottom frame, mounting assemblies are arranged on the turnover assemblies, a sliding assembly is slidably connected to the top end of the bottom frame, and a shell is arranged at the top end of the sliding assembly. The supporting frame is moved to drive the shell to move left and right, so that the shell sleeves the static side conductor and the movable side conductor for locking, in the assembling process, a travelling crane is not needed, the mounting space is saved, potential safety hazards are avoided, the hydraulic cylinder is adopted to drive overturning, manpower is saved, mounting is convenient, and the assembling efficiency is improved. The shell, the movable side support and the movable side conductor are respectively and fixedly installed on the installation base, strict centering can be guaranteed, the sliding assembly is arranged on the shell, fine adjustment of the two sides of the shell in the vertical direction is achieved, a rubber hammer does not need to be used for fine adjustment, the assembly efficiency is improved, and then the work efficiency is improved.

The application belongs to the field of automatic machinery and textile automatic cutting bed, and particularly relates to a multi-purpose polishing device for a cutting knife of an automatic cutting bed. The hollow tube type grinding wheel structure is internally driven by a motor arranged in the tube body, and is non-belt type and starts and stops immediately, has high polishing quality, and is integrated and suitable for relatively high compression space product structure. The elastic buffer structure of the polishing device is a combination of a cylinder and a pneumatic and air spring. The polishing device comprises a push-pull device, a buffer device, a suspension frame and a polishing device. The push-pull device comprises a push-pull cylinder and a push-pull integrated block. The buffer device is arranged on the back of the suspension frame and the front of the push-pull integrated block. The polishing device is arranged on the suspension frame and comprises a polishing tube, an inner core motor, a plurality of grinding wheels arranged on the polishing tube, and an inner core motor inserted into the hollow cavity of the polishing tube. The inner core motor directly drives the polishing tube to rotate, and the rotating polishing tube uses the grinding wheels on the outer wall to perform polishing work.

This utility model discloses a hot and cold stratified oil tank system with carbon recovery and multi-stage filtration functions, relating to the field of machine tool oil cooling technology. It includes an oil tank body; the oil tank body has a hot oil chamber and a cold oil chamber; the oil tank body is provided with a hot oil inlet, a hot oil outlet, a cold oil inlet, and a cold oil outlet; the hot oil inlet and hot oil outlet are opposite each other and both communicate with the hot oil chamber; the cold oil inlet and cold oil outlet are opposite each other and both communicate with the cold oil chamber; a settling tank is provided at the bottom of the hot oil chamber, and the settling tank can be removed from the hot oil chamber; a hot oil filter chamber is provided inside the hot oil chamber, located above the settling tank, and a hot oil filter assembly for filtering the flowing hot oil is provided inside the hot oil filter chamber; a transition chamber is provided at one end of the hot oil filter chamber near the hot oil inlet, the transition chamber communicating with the hot oil filter chamber and the settling tank. This system enables internal cleaning of the oil tank and reduces waste.

The utility model provides a horizontal spiral centrifuge for separating nucleic acid from yeast. The horizontal spiral centrifuge comprises an outer shell, a rotary drum and a spiral which rotate coaxially are arranged in the outer shell, a liquid discharging cavity and a residue discharging cavity are formed in the two sides of the outer shell, a residue discharging head and a liquid discharging pump wheel are arranged at the two ends of the rotary drum, the residue discharging head is arranged in the residue discharging cavity to rotate, and the liquid discharging pump wheel is arranged in the liquid discharging cavity to rotate; a slag storage cylinder is fixedly arranged at a slag discharging opening in the bottom of the slag discharging cavity, and a cover plate opened through pressure induction is arranged at the bottom of the slag storage cylinder. By introducing an advanced automatic control system, an optimized mechanical structure and a high-efficiency cleaning system, the operation efficiency and safety of the equipment are improved, long-term stable operation is ensured, and the equipment is particularly suitable for the field of biotechnology application with high requirements for hygienic standards and operation safety. According to the design, the user experience is remarkably improved, and a reliable, efficient and easy-to-maintain solution is provided for the user.

The utility model belongs to curtain wall connecting structure technical field discloses an angle adjustable keel, include: main keel, angle adjusting structure, angle adjusting structure includes adjusting seat and with adjusting seat rotation connection's adjusting lever, adjusting seat locates the inside of main keel, adjusting lever extends the outside of main keel, secondary keel, secondary keel is connected with adjusting lever to make secondary keel relative to main keel rotation. The utility model discloses through setting adjusting lever, realizes the angle change between primary and secondary keel, adapts arc ceiling, special -shaped skylight, special -shaped wall body etc. Complex design requirement, need not to make to order many specifications keel, reduces construction cost.

This utility model relates to an externally mounted three-dimensional illuminated lettering and an automobile, belonging to the technical field of externally mounted illuminated lettering. It includes a base cover and a lampshade, with an installation space between the base cover and the lampshade. A circuit board is housed within the installation space, and an LED module is encapsulated on the circuit board. The inner surface of the lampshade has laser-engraved character boundaries; the area within the character boundaries is a light-transmitting area, and the area outside the character boundaries is an opaque area. Light emitted by the LED module passes through the light-transmitting area. By placing the circuit board and LED module inside the base cover and lampshade, and driving them via an externally located driving circuit through electrical connections, the overall size and height of the lettering are reduced, meeting the requirement that the external protrusion height of the automobile is ≤10mm. The lettering is designed separately and can be assembled externally, saving installation space and offering a high degree of assembly flexibility. Even when not illuminated, the laser-engraved character boundaries still have a three-dimensional effect; when illuminated, the light-transmitting area allows light to pass through, thereby improving the lettering's recognition effect.

The utility model relates to LCD screen body appearance detection equipment which comprises a base. The feeding unit is arranged on the base; the first detection unit comprises a first camera mounting frame, a first camera module, a second camera module and a first adsorption assembly, the first camera mounting frame is arranged on the base, and the first camera module and the second camera module are movably arranged on the first camera mounting frame; the first adsorption assembly is arranged on the base in a sliding mode in the first direction and can move to the position below the first camera module and the second camera module. The first adsorption assembly comprises a first buffer plate and a first suction nozzle assembly, the first buffer plate is provided with a through hole in the thickness direction, and the first suction nozzle assembly is arranged in the through hole to adsorb a to-be-tested piece. According to the utility model, in the process of transferring the LCD screen body to be detected, the LCD screen body can be effectively protected, and the damage caused by hard contact is avoided, so that the damage to the LCD screen body in the detection process is avoided, and the qualified rate of products is improved.

The utility model discloses a watertight optical cable splicing device which comprises a support, a sleeve, a connector and an outer clamping sleeve assembly, the support is arranged in the sleeve in a penetrating mode, one end of the sleeve is detachably and fixedly connected with the connector, and the support in the sleeve is detachably and fixedly connected with an optical fiber adapter. One end of the support and the other end of the connector are respectively provided with an access hole used for accessing the optical cable, and the access hole is connected with an outer clamping sleeve assembly so as to detachably fix and seal the accessed optical cable and the access hole. A firm protective shell is provided for splicing of the optical cable, meanwhile, the optical fiber adapter is installed on the support in advance, the optical fiber connector is manufactured on the optical cable in advance, splicing can be achieved only by inserting the optical fiber connector into the optical fiber adapter in the field installation process, the field installation is easy and convenient, the overall structure is compact, and the needed installation space is small.

The invention relates to an integrated air compressor, and relates to the technical field of two-wheeled vehicle air suspension systems, the integrated air compressor comprises a shell and a base, the bottom of the shell is connected with the base, and a driving assembly is arranged in the shell; a pump chamber is arranged on the top face of the shell, the upper end and the lower end of the pump chamber are communicated with the outside of the shell, a pump chamber end cover is arranged at one communication position, gain cavities are connected to the two sides of the pump chamber, the other ends of the gain cavities are communicated with the outside of the shell, gain cavity end covers are arranged at the communication positions, and an air inlet is formed in the position, close to the edge of one side, of the top face of the shell and communicated with the pump chamber through an air channel. An exhaust port is formed in the top face of the shell and formed in the side, away from the air inlet, of the pump chamber, the air inlet communicates with the gain cavities at the two ends through an air channel, and a valve chamber is arranged between the exhaust port and the air channel. An electric control chamber is arranged in the base, and a PCB is arranged in the electric control chamber. The whole vehicle assembly process is simplified; the sealing performance, the stability and the gas gain efficiency of the system are improved; the size and weight are reduced, and the frame mounting space is saved; the production cost is reduced, and the control response precision is improved.

The invention belongs to the technical field of peristaltic pumps, and particularly relates to a detachable cavity type adjusting peristaltic pump which comprises a controller, a control screen module is arranged on the front face of the controller, a bottom frame is fixedly connected to the bottom of the controller, a power mechanism is arranged in the bottom frame, a pump shell is arranged on the side face of the bottom frame, and a second arc-shaped plate is arranged in the pump shell. A rotating shaft is rotationally arranged in the pump shell, a strip-shaped frame is arranged on the rotating shaft in a surrounding array mode, three sets of supporting blocks are arranged in the strip-shaped frame, and pressure applying rolling wheels are rotationally arranged on the supporting blocks. According to the detachable cavity type adjusting peristaltic pump, by arranging the pressure applying rollers, the first arc-shaped plate and the second arc-shaped plate, synchronous conveying of multiple sets of fluid can be achieved, the three sets of elastic pipelines are sequentially arranged from outside to inside, the pressure applying rollers are correspondingly arranged below the corresponding elastic pipelines, the three sets of pipelines conduct synchronous extrusion conveying, and the fluid conveying amount in unit time can be remarkably increased; the requirements of laboratories and industrial scenes for large flow and high processing efficiency are met, and the installation space can be saved.

The utility model discloses an air conditioner panel assembly of a small passenger car, which comprises an outer shell, an adjusting button capable of swinging is arranged on the outer shell, and an extrusion component and a sensing chip are sequentially arranged below the adjusting button correspondingly, and is characterized in that the outer shell is movably provided with a switching slide block on one side of the adjusting button; a guide part is arranged at the bottom of the switching sliding block in an extending mode, a cavity is formed in the guide part, an extrusion induction block is arranged in the cavity in a liftable mode, and an elastic piece is arranged between the extrusion induction block and the switching sliding block in a tightly-pressing mode. The sensing chip is provided with a start-stop sensing part, a temperature adjusting sensing part, an air volume adjusting sensing part and an internal and external circulation sensing part which can make contact with the extrusion sensing block on the moving path of the switching sliding block. According to the air conditioner panel assembly, adjustment of multiple functions can be effectively achieved, the specification size of the air conditioner panel assembly is greatly reduced, and the air conditioner panel assembly can be conveniently installed in a small space.

The utility model belongs to the technical field of electronic equipment processing, specifically provide a linear step motor, including motor body, linear moving part, guide piece and position detection element, motor body drive linear moving part along self axial linear motion, guide piece sets up on motor body, can guide linear moving part, guarantee moving direction precision, position detection element is used for detecting the moving distance of linear moving part, guarantees moving distance precision, guide piece and position detection element common effect, can satisfy electronic and semiconductor product processing to the requirement of position precision. The utility model installs guide piece in the one side of motor body shell, and is through the sliding slot and the convex structure and linear moving part sliding fit, has the advantages such as compact structure, convenient arrangement, help to save the installation space, especially suitable for the narrow use scene of space.

This utility model discloses a lockable sliding switch, comprising: an upper shell and a lower shell, the upper shell and the lower shell being connected to form a closed outer shell structure; a rotary lock seat, rotatably disposed within the upper shell and the lower shell; and a fixed lock seat, fixedly disposed within the upper shell and the lower shell, forming a relative rotational relationship with the rotary lock seat; the rotary lock seat is provided with a first locking plate, and the fixed lock seat is provided with a second locking plate; when the rotary lock seat is rotated to the locked position, the first locking plate and the second locking plate abut face to face, blocking the rotation of the rotary lock seat; the rotary lock seat is provided with a lock hole, and when the rotary lock seat is in the locked position, an external lock can be inserted into the lock hole and locked. This lockable sliding switch has the characteristics of double locking to prevent misoperation, stable gear switching, and reliable contact.

The utility model discloses a mining belt conveyor tail self-moving and reversed loader stepping self-moving device which comprises a valve body, an electromagnetic pilot operated valve I, an electromagnetic pilot operated valve II, an electromagnetic pilot operated valve III and an electromagnetic pilot operated valve IV are sequentially arranged above the valve body, and the electromagnetic pilot operated valve I is communicated with a hydraulic control reversing valve I and a hydraulic control reversing valve II respectively. The electromagnetic pilot operated valve II is respectively communicated with the hydraulic control reversing valve III and the hydraulic control reversing valve IV; the electromagnetic pilot operated valve III is respectively communicated with the hydraulic control reversing valve V and the hydraulic control reversing valve VI; and the electromagnetic pilot operated valve IV is respectively communicated with the hydraulic control reversing valve VII and the hydraulic control reversing valve VIII. The self-moving device solves the problem that an existing self-moving device is low in self-moving efficiency.

The utility model relates to a cotton picker and a fan assembly thereof, the fan assembly is provided with a driving mechanism and fans, the driving mechanism is used for driving a plurality of fans, fan shafts of the fans are connected in series through a coupling device, an air outlet of each fan is provided with a shunt pipe, splines at two ends of the coupling device are respectively connected with adjacent fan shafts, the coupling device comprises a retainer, and the retainer is provided with a plurality of through holes. Buffering pieces are arranged on the two sides of the retainer, the cotton picker is provided with a frame, a cotton picking head is arranged at the front end of the frame, a cotton box is arranged on the rear portion of the frame, a fan assembly is arranged on the frame, the flow dividing pipe is used for being connected with a cleaning head and the cotton picking head, and the cleaning head faces the upper portion of the frame. Original independent fans are integrated, one hydraulic motor can drive a plurality of fans, the installation space is greatly saved, cleanliness of the frame is guaranteed, sundries can be prevented from entering a cotton box and a packing box, air is blown to the frame regularly to clean the upper portion of the frame, the structure is simpler, and the occupied space is smaller.

The utility model discloses a multifunctional water tank of cooling relates to water tank technical field, including box, coil evaporator, water inlet pipe, drain pipe, overflow pipe, water supplementing mouth and float ball valve, the inside of box is provided with at least one coil evaporator, and the coil evaporator has import joint and export joint, and import joint and export joint are located in the one side outer wall of box and with the inside intercommunication of coil evaporator, and the one end of box is provided with water inlet pipe, drain pipe, overflow pipe and water supplementing mouth, and water inlet pipe, drain pipe, overflow pipe and water supplementing mouth are communicated with the inside of box respectively, and the inside of box is located at water supplementing mouth and is provided with float ball valve. In the utility model, through with the integration design of coil evaporator and water tank, form coil evaporative heat exchange system, has realized efficient heat exchange, compares traditional heat exchange mode, and heat exchange efficiency improves about 30%, and the equipment adopts compact design, and the installation space is saved.

The winch with the walking mechanism comprises a winding drum, a base, a winding drum support and an installation platform, the base moves on the installation platform in a reciprocating mode, a fixed support is installed in the middle of the installation platform, a lead screw matched with a lead screw nut is installed on the fixed support in a rotating mode, and a driven chain wheel is installed at one end of the lead screw. A winding drum support is installed at the top end of the base, a bearing seat is installed on one side of the winding drum support, the winding drum is installed on the bearing seat, a driving chain wheel is installed at one end of the winding drum, and the driving chain wheel and a driven chain wheel are connected through a chain. A motor is installed on the other side of the winding drum support and drives the winding drum to rotate through a planetary gearbox. According to the utility model, when the winch works, the winding drum part of the winch can correspondingly and axially move along with the winding and unwinding of the steel wire rope on the winding drum, so that the relative position of the steel wire rope is not changed.

The utility model provides a guide rail pair of integrated displacement detection function, including track and the slide block of slidable setting on the track along front -back direction, the upper surface fixed setting of track has the magnetic scale along its length direction extension, the front end fixed setting of slide block has fixed block, the bottom surface of fixed block is parallel to the upper surface of track and is fixed with hall induction magnetic head, hall induction magnetic head is towards the magnetic scale and with the magnetic scale mutual magnetic induction, hall induction magnetic head passes through the cable and the controller electricity of outside connection. The utility model discloses compact structure, convenient to install and integrated measurement function.

The utility model relates to the technical field of steel plate rough rolling machining, and discloses a steel belt guiding device for steel plate rough rolling machining, which comprises a mounting frame, a servo motor is fixedly mounted at the upper end of the right side wall surface of the mounting frame, and the output end of the servo motor movably penetrates through the right side of the inner wall of the mounting frame. A first connecting shaft is fixedly installed at the output end of the servo motor, a conveying roller is fixedly installed on the left side wall face of the first connecting shaft, and a second connecting shaft is fixedly installed on the left side wall face of the conveying roller. According to the self-adaptive guide deviation correction mechanism, the effect of limiting and guiding steel belts of different specifications can be achieved through mutual separation or approaching of a first guide ring plate and a second guide ring plate, the situation that the steel belts deviate in the transportation process is prevented, and the situation that the quality and efficiency of subsequent equipment for machining the steel belts are greatly reduced is avoided; and the requirement of rough rolling of the steel plate is met.

The present application relates to rainwater pretreatment technical field, especially to a kind of water supply and drainage pipeline end treatment device, containing water delivery assembly, filter assembly and be arranged between intermittent component;Water delivery assembly contains support platform, cam piece, guide pipe, piston etc., can be stable to transport filtered rainwater to jet pipe;Filter assembly contains stirring barrel, driven shaft etc., realize rainwater filtration and impurity separation;Intermittent component transmission power and adjust speed.Single servo motor drive cam piece, drive piston reciprocating motion realizes water delivery, while driving stirring barrel rotation by intermittent component, jet pipe flushes filter screen, and impurities are discharged from conveying pipeline.The device structure is compact, power utilization is high, can realize filtration and self-cleaning synchronous, prevent blockage, easy to maintain, can improve rainwater pretreatment efficiency, reduce cost, guarantee pipeline stable operation.

The utility model relates to the technical field of vehicles, in particular to an auxiliary water tank and a vehicle, the auxiliary water tank comprises a body and a pressure cover, the body comprises a bottom wall, a top wall and a peripheral wall which define a liquid storage cavity, and at least two liquid supplementing ports a communicated with the liquid storage cavity are formed in the side, close to the bottom wall, of the peripheral wall; a filling port communicated with the liquid storage cavity is formed in the side, close to the top wall, of the peripheral wall, an exhaust port communicated with the liquid storage cavity is formed in the top wall, and the at least two liquid supplementing ports a are used for being communicated with compensation ports b of at least two engine cooling systems of the vehicle; the pressure cover is used for sealing the exhaust port. The auxiliary water tank is provided with at least two liquid supplementing ports a, the at least two liquid supplementing ports a can be communicated with compensation ports b of the at least two engine cooling systems, and therefore one auxiliary water tank can supplement cooling liquid for the at least two engine cooling systems at the same time, and the installation space occupied by the auxiliary water tank in a cabin is saved; and the manufacturing cost of the whole vehicle is also reduced.

This utility model relates to the field of cable tray technology, specifically to a lightweight cable tray support using a molding process. It includes a base box with a top cover slidably mounted on one side and several mounting brackets symmetrically mounted on both sides. A limiting component is installed inside the base box to accommodate cable trays of different sizes. A drive component is installed on one side of the base box to drive the limiting component. Compared to existing technologies, this application uses a molding process for one-piece molding, resulting in a lighter and stronger structure. Combined with the adjustable limiting component and drive mechanism, it can adapt to the installation requirements of cable trays of different sizes, achieving efficient and stable limiting and clamping, improving installation flexibility, structural stability, and construction efficiency, reducing overall costs, and possessing greater versatility and practicality.

The integrated universal battery box assembly comprises a base body and a battery box cover, a battery bin used for containing a battery and a circuit board are arranged in the base body, the battery bin comprises a containing cavity used for containing at least one alkaline battery, and the circuit board is arranged in the containing cavity. The circuit board is provided with an alkaline battery output end and a lithium battery output end, the alkaline battery can be electrically connected with the alkaline battery output end through an alkaline battery pole piece, and the lithium battery is electrically connected with the lithium battery output end. A battery box output end is arranged on an outer side plate of the base body, the battery box output end is electrically connected with the circuit board, and when the universal battery box assembly is installed in the servo driver, the outer side plate of the universal battery box assembly is flush with a driver main panel of the servo driver. The structure space of the servo driver is remarkably saved, an operator can conveniently replace an external power supply, and meanwhile the servo driver has wide universality.

The utility model discloses a single pipe water pump, including water inlet portion and water outlet portion, be equipped with the water storage portion between water inlet portion and water outlet portion, install drive portion in the water storage portion, drive portion absorbs water from water inlet portion and stores to the water storage portion, and spouts from water outlet portion, the water storage portion is the cavity, the cavity one end is linked together with water inlet portion, and the other end is linked together with water outlet portion. The utility model sets up the through -hole on the piston, makes piston and clear water share a pipeline, reduces the overall structure of water pump, saves the installation space, saves the cost.