108results about How to "Push smooth" patented technology

The invention relates to the field of steel cutting equipment, in particular to die steel fixed-length cutting equipment which comprises a base, supporting pieces are fixedly installed on the front side of the base in a bilateral symmetry mode, a cutting saw is arranged on the upper side of the front portion of the supporting piece on the left side in a left-right sliding mode through an electric sliding block, and a pushing mechanism for pushing die steel materials in a fixed-length mode is arranged in the middle of the base. The positioning mechanism is in contact with the die steel material in a rolling contact mode, rolling contact points are evenly distributed in the upper direction, the lower direction, the left direction and the right direction of the die steel material, and therefore sliding friction between the positioning mechanism and the die steel material is prevented; and the cutting effect and the cutting precision of the die steel materials are guaranteed, the pushing plate is controlled to be not in contact with the die steel materials during reset movement through the control assembly, and the cutting effect and the cutting precision are further guaranteed.

The collodion mop comprises a body, the body comprises a mounting plate and collodion, the collodion is mounted on the lower end face of the mounting plate, two connecting plates are arranged above the collodion, the two connecting plates are oppositely arranged at the left end and the right end of the collodion, a plurality of clamping hooks are arranged on the connecting plates, the mounting plate is provided with clamping grooves matched with the clamping hooks, openings are formed in the inner side ends of the clamping grooves, and the openings are communicated with the clamping grooves. When the connecting plate is mounted on the mounting plate, the clamping hooks are arranged in the clamping grooves; a push button is arranged on the connecting plate, a penetrating opening is formed in the mounting plate, the push button penetrates through the penetrating opening, the upper end of the push button is exposed, the push button is pushed, the clamping hook is separated from the clamping groove through the opening, and the connecting plate falls off from the mounting plate. According to the collodion mop with the quick-release cotton head, the clamping hook is aligned to the clamping groove, the mounting plate is pressed, so that the clamping hook is arranged in the clamping groove, collodion is mounted on the mounting plate, and the collodion mop is convenient and quick to mount; by pushing the push button, the clamping hook is separated from the clamping groove through the opening, so that the connecting plate falls off from the mounting plate, and the collodion is disassembled; one-key separation is achieved, and disassembly is rapid.

The invention discloses a lithium battery charge and discharge test device, and relates to the field of lithium battery charge and discharge test, the lithium battery charge and discharge test device comprises a support base, a console and a to-be-tested battery, the console is arranged outside the support base, the top of the to-be-tested battery is provided with a charge and discharge interface, and the top of the support base is rotatably connected with a test board. The test bench is driven by a motor, eight test grooves are annularly formed in the top of the test bench at equal intervals, and the to-be-tested batteries are placed in the test grooves. According to the charging and discharging testing device for the lithium battery, through mutual cooperation of the testing table, the charging and discharging testing unit, the discharging unit and the material distributing unit, feeding and discharging operation can be automatically carried out in the charging and discharging testing process of the lithium battery, so that the lithium battery testing work can be continuously carried out; and the tested batteries can be classified and conveyed, so that the testing process of the lithium batteries is more convenient, the safety is better, and the efficiency is higher.

This utility model discloses an auxiliary feeding structure for rotor laminations, relating to the field of rotor lamination processing technology. It includes a base plate, with support legs fixedly installed at each of the four corners of the base plate. A support frame is fixedly installed on the left side of the base plate, and a cross-shaped limiting plate is fixedly installed on the top right side of the support frame. Lamination clamping plates are provided at each of the four corners of the bottom of the cross-shaped limiting plate. It also includes a lamination adaptation and support mechanism, located on top of the cross-shaped limiting plate and used to clamp and limit multiple sets of longitudinally placed laminations. This utility model, through the arrangement of the base plate, support legs, support frame, cross-shaped limiting plate, lamination clamping plate, lamination adaptation and support mechanism, support and clamping drive mechanism, and lamination pushing mechanism, solves the problems of low efficiency and high safety hazards associated with traditional manual feeding, as well as poor stability and insufficient versatility of simple mechanical feeding. It achieves the effects of automatic clamping and limiting, stable pushing, and adaptation to laminations of multiple sizes.

The utility model discloses a sofa cover elastic band installation threading device, including threading device assembly, still including magnetic suction disc subassembly, threading device assembly includes and has threading head, the upper end of threading head is provided with the magnetic suction board, and one end of threading head is provided with the connecting sleeve, the utility model discloses through elastic band placing groove place elastic band, then utilizes the lower pressure splicing strip to be fixed with elastic band placing groove splicing after the lower pressure of elastic band, thereby realizes the fixed function of one end of elastic band, then whole threading device assembly is inserted into the elastic band cover of sofa cover, then hand holds the handle and will be close to threading head with magnetic suction piece, because the magnetic attraction between threading head and magnetic suction piece makes when dragging handle, the magnetic suction board is adsorbed and dragged by magnetic suction piece, thereby completes the dragging threading function of elastic band, greatly improves the efficiency of sofa cover elastic band threading.

The present invention discloses a double-station laser cutting machine, which relates to the technical field of laser cutting machines, and comprises two sets of coiling machines, leveling machines, cutting platforms and conveying lines arranged in parallel, wherein a base frame is fixedly connected between the coiling machine and the leveling machine, the leveling machine and the conveying line are arranged at the head and tail ends of the cutting platform, a laser cutting head is arranged above the cutting platform, and further comprises: a material anti-tilt mechanism and an adjustment and adaptation mechanism. The double-station laser cutting machine adopts a double-station design, so that the laser cutting head can operate continuously without being interrupted due to the transportation of materials. It is modified on the basis of the original laser cutting machine, and the modification cost is low. It makes up for the defect that the cutting head of the traditional intermittent cutting machine frequently stops operating, so that the cutting head can operate uninterruptedly, and the operating efficiency is greatly improved. The cutting range of the cutting area can be flexibly adjusted according to the width of the material to meet the cutting requirements of coatings of different widths, and the application range is wide.

The invention relates to the technical field of steel wire pipe production, in particular to steel wire pipe online material separating and pushing equipment which comprises two external connecting plates used for being connected with an external machine tool, lead screws are installed on one sides of the two external connecting plates in a threaded mode, and a working platform is jointly and fixedly installed at the tops of the two lead screws. An inclined placing plate is arranged on one side of the external connecting plate; the pushing assembly is arranged below the working platform; and the multiple feeding assemblies are all arranged above the inclined containing plate. Compared with the prior art, the feeding assembly is internally provided with the conveying module, so that the feeding assembly can adapt to steel wire pipes of different specifications, and the automation level of feeding and the universality and flexibility of the whole equipment are improved.

The utility model provides a kind of for material large roll storage's storage rack, comprising: support frame body and two push components, support frame body is used to support material large roll;Support frame body is equipped with the guide channel extending along first preset direction, guide channel is used to accommodate at least part of material large roll, and guide material large roll to roll along the extension direction of guide channel;Two push components are movably arranged on support frame body along first preset direction, and two push components are respectively located on the opposite sides of guide channel, and the pushing portion of two push components is respectively used to abut with the both ends of material large roll, to push material large roll along the extension direction of guide channel towards target position by two push components synchronously to roll.The storage rack for material large roll storage effectively solves the technical problem that when material large roll rolls on storage rack and is stuck in operating position in prior art, manual external force is applied to push and pull to forcibly remove the jam.

The utility model relates to the technical field of machining, in particular to a combined mechanical claw for hub bearing machining, which comprises a rotary driver, a feeding claw and a discharging claw, the feeding claw and the discharging claw are both mounted at the output end of the rotary driver, and the rotary driver is used for driving the feeding claw or the discharging claw to rotate to a working position. The feeding claw and the discharging claw each comprise a plurality of clamping claws which can be close to or away from each other and are located on the same circumference, each clamping claw is provided with a clamping finger, the clamping fingers comprise the near clamping finger and the far clamping finger, the distance between the near clamping finger and the center of the circumference is smaller than the distance between the far clamping finger and the center of the circumference, and a distance exists between the near clamping finger and the far clamping finger in the projection direction of the center line of the circumference. The mechanical arm for hub bearing machining comprises a combined mechanical claw for hub bearing machining and further comprises a mover used for driving the combined mechanical claw for hub bearing machining to move spatially. According to the scheme, the problem that in the prior art, a mechanical claw needed for machining a small inner ring of a hub bearing cannot be universal is solved.

The utility model relates to polishing device technical field, and disclose a kind of polishing device for numerical control lathe shell surface processing, including platen one and platen two, platen one and platen two between being provided with rotating rod, the lower end between platen one and platen two is symmetrically installed with U-shaped frame, the inside of the front and rear ends of U-shaped frame is slidably installed with square bearing, the inside between square bearing is fixedly installed with driving wheel, sand belt is installed between driving wheel, the upper side of square bearing is uniformly provided with baffle on U-shaped frame, adjusting screw is penetrated and is screw-connected in the middle of baffle, the front and rear ends of platen one and platen two are fixedly installed with fixed plate in close to corner place, roller is rotatably installed on fixed plate in close to lower side place. The device can increase polishing area, reduce operating labor intensity, and the edge chamfering of numerical control lathe shell can be stably and uniformly polished.

The embodiment of the present application provides a weeding tool, and relates to the field of horticulture technology.The weeding tool comprises a base, a rod body, a connecting seat, a rotating seat, a motor, a fixing frame, a mounting seat, an electric push rod, a driving seat, a fixing sheet and a weeding shovel.The rod body is rotatably installed on the base, the connecting seat is installed on one end of the rod body, the rotating seat is rotatably installed on the lower surface of the connecting seat, and the motor is installed in the connecting seat.The present application can separate the soil in the inverted conical area, remove the plant roots, accurately operate and avoid damaging the soil in a large area;on the other hand, the present application can adjust and fix the angle of the weeding shovel, adapt to different root depths and reduce excessive soil excavation.The present application can also ensure that the rod body is stable and the weeding shovel does not touch the ground when moving, automatically adjusts and locks the angle of the rod body during operation;personnel can also position through the foot pedal, which comprehensively ensures the stable and efficient operation of the equipment and is beneficial to the cleaning of invasive plants.

The utility model discloses a kind of Roman umbrella handle, and its technical solution main points include handle;The handle includes handle left piece and handle right piece;Handle left piece and handle right piece are opened with wheel hole on;First pulley is arranged in the wheel hole;The first pulley is arranged in the wheel hole by second positioning pin;There is fixed seat in the handrail;Second pulley connected with fixed seat by third fixed pin is arranged in the fixed seat;More stable and smooth when handle is pushed on umbrella pole by first pulley and second pulley, not easy to shake;The handle includes handle left piece and handle right piece so that handle and handrail can be disassembled when transporting, so that packaging volume can be reduced, and cost can be savedThe utility model has the effect that handle is more stable when pushing, handle is detachable, packaging volume is reduced, and cost is saved.

The utility model provides an automatic loading machine tool which comprises a machine tool body, an inclined slide way and a transversely arranged bottom plate are arranged on the machine tool body, and sliding rails are transversely and symmetrically arranged on the front side and the rear side of the upper end of the bottom plate. The machine tool body is provided with a sleeve which is located on the right sides of the two sliding rails and ascends and descends through a lifting air cylinder, and the bottom plate is provided with a pushing assembly which can push the inner pipe sliding into the position between the two sliding rails from the sliding way into the sleeve. A second air cylinder used for pushing the inner pipe in the sleeve is transversely arranged on the machine tool body. The inner pipe feeding device has the advantages of being simple and reliable in structure, capable of automatically feeding inner pipes in sequence and capable of improving efficiency.

The utility model discloses a self-balancing pulley block which is characterized in that the self-balancing pulley block comprises a pulley bearing main body and a pulley assembly, the side part of the pulley bearing main body is provided with a pulley groove and a bearing shaft, the pulley assembly is movably arranged in the pulley groove, and the pulley assembly is rotatably connected with the pulley bearing main body through the bearing shaft; a plurality of positioning wheels are arranged on the outer side of the pulley bearing body and used for making contact with the inner side wall of the guide rail groove, the pulley bearing body is guided to move along the guide rail groove, and the jamming phenomenon is avoided. Automatic height balance adjustment is achieved, and sliding is smooth under the condition that a guide rail is uneven; the positioning wheels can guide movement, blocking is avoided, the whole device is stable and reliable, assembling and disassembling are convenient, and running is smooth.

The invention belongs to the technical field of insulation board construction equipment, and particularly relates to fabricated building external wall insulation board construction equipment which comprises an electric sliding rail and an insulation board, the top of the output end of the electric sliding rail is fixedly connected with a first electric telescopic rod, and the output end of the first electric telescopic rod is fixedly connected with a supporting plate; a door-shaped plate is fixedly mounted at the top of the supporting plate, a storage bin is fixedly mounted at the top of the door-shaped plate, a servo motor is fixedly mounted on the side face of the storage bin, and two first gears are rotationally connected to the inner wall of the storage bin. And then a push plate is pushed through a second electric telescopic rod so that the heat preservation plate can be pasted on the outer wall, the heat preservation plate can be comprehensively assembled on the outer wall through an electric sliding rail and a first electric telescopic rod, and therefore the heat preservation plate can be safely and rapidly installed.

The present application relates to the technical field of cooling of vehicle power components, and particularly relates to a water pump rotor for cooling vehicle power components, which comprises a rotor (1) and a wheel disc (2) fixed to the rotor (1), and a plurality of blade shafts (5) circumferentially distributed on the wheel disc (2), one end of each blade shaft (5) extending out of a front end surface of the wheel disc (2) and being fixed with a blade (4), and the other end of each blade shaft (5) extending out of a rear end surface of the wheel disc (2) and being connected with an automatic rotating device, the automatic rotating device driving the blade (4) to rotate through the blade shaft (5). The present application can automatically change the inclination angle of the blade when rotating at high speed or low speed, so as to promote the improvement or reduction of water delivery efficiency, effectively meet the use requirements, and meanwhile ensure the stability of the blade when rotating at low speed or high speed.

The utility model discloses a pad automatic feeding machine, including first mount, first mount bottom is provided with hydraulic platform and the first hydraulic drive mechanism of drive hydraulic platform and make the lifting movement, first mount upper portion is provided with horizontal drive module along X axle direction, the drive end of horizontal drive module is provided with push rod, and the front end of push rod is provided with push block, first mount one side is provided with cylinder machine and is used for driving cylinder machine and makes the second hydraulic drive mechanism of lifting movement, be provided with a plurality of roll axes on cylinder machine, so that pad can pass through roll axis and move along Y axle direction, when push block moves forward, and push block pushes pad to a plurality of roll axes, and this structure is through adopting the mode of automatic feeding, and the efficiency of pad feeding is greatly improved, compared with traditional manual operation, not only saves manpower cost, but also significantly improves the overall operation speed of production line.

The utility model provides a microneedle operating device which comprises an operating handle, a wheel carrier and a roller, the operating handle comprises an inner cavity, a liquid storage pipeline is arranged at the front end of the inner cavity, and a first liquid outlet of the liquid storage pipeline penetrates through a liquid outlet hole in the lower portion of the operating handle; the wheel carrier comprises a first wheel carrier, and a first connecting position of the first wheel carrier is connected with the first liquid outlet; the first runner of the first wheel carrier is connected with the first through hole of the first wheel carrier; the second runner of the first wheel carrier is communicated with the first through hole; the roller is provided with a plurality of micro-needle mounting holes, and the hollow micro-needles are arranged in the micro-needle mounting holes; a hollow shaft is arranged in the rolling wheel, a fourth flow channel is formed in the hollow shaft, and the fourth flow channel communicates with the second flow channel; a second through hole is formed in the side wall of the hollow shaft, the first end of the second through hole is connected with the fourth flow channel, the second end of the second through hole is arranged on the surface of the side wall of the hollow shaft, and the fourth flow channel communicates with the interior of the hollow microneedle. Liquid medicine of the microneedle operating device can enter a corium layer, and the microneedle operating device is simple in structure.

The present application relates to paperboard processing technical field, disclose a kind of conveying paper box processing board's material conveying equipment, it is related to carton production technical field, including support plate, conveyer belt, pile frame, sliding plate, rotating roller, belt, L plate, rubber ball, shovel division, follow-up part and gas auxiliary part;Pile frame has inclination angle, paperboard is stacked in pile frame inside in ladder form and is supported on sliding plate;Shovel division is symmetrically arranged in both sides of pile frame, including continuous pushing piece and continuous shovel piece, can shovel division paperboard in the bottom of pile under the push of L plate;Follow-up part is connected with shovel division, and continuous shovel piece is synchronously moved by switch and electric lever triggering;Gas auxiliary part includes air pressure piece and gas jet piece, can spray gas to assist separation of adhering paperboard.The present application solves the problem that stacked paperboard is easily adhered in existing equipment, leading to inaccurate material conveying, realizes the stable and accurate material conveying of single paperboard, improves the automation degree and production efficiency of carton production, and is suitable for the material conveying scene of various carton processing boards.

The utility model discloses cold extrusion male die negative pressure cavity pressure increasing valve mechanism belongs to mould processing technical field. Cold extrusion male die negative pressure cavity pressure increasing valve mechanism, including valve body, the one end of valve body is provided with valve bush, and the other end of valve body is provided with the plug, wherein, the plug is connected with the valve body telescopic, the inside of valve body is provided with valve cavity, and the inside of valve cavity is provided with compression spring. To solve the problem that needs to repeatedly spin the operation in the product forming process, can product inner wall and spinning core core adhere, because wall body is thicker than wall bottom, more repeatedly spins to make wall body thickness reach the problem of requirement, through the high pressure medium of injection in single extrusion stroke, instantaneously produces strong negative pressure adsorption force and even radial pressure, one-time or a few times spin pressure can realize the close adhesion of wall body and core core, and the material is driven to the wall part flow thickening with strong force, eliminates the demand of repeatedly spinning.

This utility model relates to the field of plastic processing equipment, and more particularly to a high-efficiency screening device for modified plastics. It includes a base, a screening machine fixedly connected to the left side of the base, and a support fixedly connected to the right side of the base. A material cylinder is bolted to the support. The material cylinder is installed at an angle, higher on the left and lower on the right. A discharge port is located on the lower left side of the material cylinder, directly above the screening machine, ensuring accurate material entry into the machine. An inlet is located on the upper right side of the material cylinder. Through the auger and the inclined material cylinder, a highly efficient material conveying system is formed. The auger's spiral blades rotate at high speed driven by a motor. Combined with the inclined structure of the material cylinder (higher on the left and lower on the right), the material is quickly and stably pushed from the inlet to the outlet using both gravity and mechanical thrust. Compared to traditional devices, the feeding efficiency is significantly improved.

The utility model discloses a sand painting demonstration device which comprises a supporting frame, the supporting frame is installed on external equipment, an adjusting mechanism is arranged on the supporting frame and comprises a guiding rod, a guiding sleeve, a pushing mechanism, a limiting frame, a fixing sleeve, a connecting mechanism, a middle rod, a pushing spring, a top ball, a spring and a pressing rod, the guiding rod is installed on the supporting frame, and the guiding sleeve is installed on the supporting frame. The guide rod is slidably connected to the guide rod, the pushing mechanism is installed on the supporting frame, the design of the adjusting mechanism allows a user to adjust the height of the sand painting demonstration device according to needs so as to adapt to the heights or sitting postures of different performers, a handle and a folding plate are pressed to drive a guide sleeve to move upwards, and therefore the position of a limiting frame is changed. Due to the fact that the sand painting bearing plate is placed in the limiting frame, the height of the sand painting is adjusted along with movement, it is guaranteed that a performer can create at a comfortable and appropriate position, and the comfort level and convenience of the performer are improved through the adjusting mechanism.

The utility model discloses a window body connecting structure and a curtain wall horizontal sliding window, relates to the technical field of doors and windows, and adopts the technical scheme that the window body connecting structure comprises a first connecting component and a second connecting component, a middle component is arranged between the first connecting component and the second connecting component, the middle component comprises a limiting rod group, and the limiting rod group is a foldable or extendable rod body combination; and the limiting rod group can enable the first connecting main body and the second connecting main body to be close to or far away from each other in a parallel posture. The window body connecting structure has the beneficial effects that the window body connecting structure in the scheme enhances the connecting stability while ensuring the connecting flexibility, and avoids the problem of unstable swinging caused by the dead weight of the window sash and the high-rise wind pressure. Long-term stable and reliable operation of the curtain wall horizontal sliding window is guaranteed, the service life of the window body connecting structure is prolonged, the maintenance cost and the use risk are reduced, and the curtain wall horizontal sliding window connecting structure has high popularization value and economic benefits in practical application.

The utility model provides a chemical wastewater treatment device based on catalytic ozonation, which relates to the technical field of sewage treatment and comprises a treatment mechanism, a guide mechanism is arranged on one side of the treatment mechanism, the treatment mechanism comprises a cavity, a reaction tank is arranged in the cavity, and a rotating roller is arranged on the inner surface of the reaction tank. According to the utility model, the ozone generator and the oxidizer are started at the same time, so that air flows of the ozone generator and the oxidizer enter the catalyst reactor at the same time, and a catalyst can further reduce the reaction activation energy, thereby accelerating the oxidation process; the method comprises the following steps: firstly, the valve is opened, so that a part of wastewater flows onto the detection plate, and then the water quality is detected through the detection table, so that the treated wastewater is ensured to meet the discharge standard or the quality requirement.

The utility model relates to a cattle raising feed putting device which comprises a mounting block, a height adjusting part is arranged at the top of the mounting block, a distance adjusting part is arranged at the top of the height adjusting part, and feed storage tanks are symmetrically mounted on the left side and the right side of the distance adjusting part; the distance adjusting part comprises a containing shell, the containing shell is fixedly installed at the telescopic end of the height adjusting part, and a first motor is fixedly installed on the front side of the containing shell. According to the feed throwing device for cattle raising, the height of the feed storage tanks can be flexibly changed through the telescopic effect of the height adjusting part, the problem that an existing device cannot adapt to the height change of a feed trough is solved, the height requirement of the feed trough in cattle farms with different layouts such as single row and double rows can be met, the distance between the feed storage tanks on the two sides can be adjusted through the distance adjusting part, and the feeding efficiency is improved. The problem that an existing device is difficult to deal with the distance difference of feed troughs is solved, and the device can adapt to the layout of cattle farms of various specifications.

The utility model relates to metal processing technical field discloses stainless steel sheet blanking and dividing equipment, including the organism, the outer wall front side of organism installs the adjusting mechanism, the adjusting mechanism is used for adjusting the roll spacing, the top of organism installs the fixed establishment, the fixed establishment is used for quick fixed blanking tool, the adjusting mechanism includes the press roll, the press roll installs the outer wall front side at the organism, the outer wall left and right ends of press roll all are fixedly connected with double rack, a plurality of double rack's outer wall all install the adjusting frame, the inside of adjusting frame with double rack's outer wall sliding connection, in the utility model, make double rack slide in the inside of adjusting frame, further drive the press roll to slide in the adjusting frame middle part, realize the adjustment of roll spacing through the position adjustment of press roll, make the device can carry out the steady transportation and push to the plate material of different thickness size, improve the processing precision of stainless steel plate material.

The invention relates to the technical field of automobile part detection, in particular to detection and separation equipment and process for an automobile guider, the detection and separation equipment comprises an equipment body and a guider, the equipment body comprises a stable support and an electrical cabinet, and an electrical connector is arranged in the electrical cabinet; a control box is arranged on the stable bracket; a display screen and a control button are arranged on the control box; a fixing plate is further installed on the stabilizing support, and a conveying mechanism and a detecting and sorting mechanism are arranged on the fixing plate in a matched mode. The conveying mechanism and the detecting and sorting mechanism cooperate with each other, and automatic continuous operation of the guider from feeding to detecting to sorting is achieved. Through integrated design and optimized layout, automatic continuous operation of the guider is achieved, and the production efficiency and accuracy are improved; the detection and sorting process is rigorous and efficient, the product quality is ensured, the production management intelligence is improved, the cost is remarkably reduced, and the equipment universality and adaptability are enhanced.

The application discloses a bidirectional plastering and ribbing auxiliary device. The device comprises a vertical ribbing assembly and a horizontal ribbing assembly. The vertical ribbing assembly comprises a vertical sticking plate, an air pump, a bottom plate, an adjusting plate, an air bag and a limiting rod. The vertical sticking plate is provided with an adjusting groove. The horizontal ribbing assembly comprises a horizontal sticking plate, a limiting plate, an adjusting screw and a connecting seat. The connecting seat is located in the middle of the horizontal ribbing assembly, and the horizontal sticking plate is located on the left and right sides of the connecting seat. The horizontal ribbing assembly is connected with the vertical ribbing assembly through the connecting seat. The bidirectional plastering and ribbing auxiliary device is provided with the vertical ribbing assembly and the horizontal ribbing assembly, so that the horizontal and vertical ribbing operations can be completed at one time when the ribbing is made, the difficulty of the horizontal ribbing is effectively reduced, and the ribbing efficiency is greatly improved.

The utility model discloses a self-lubricating plunger pump, and relates to the technical field of plunger pumps. The plunger pump comprises a plunger pump body, a plunger barrel is fixedly connected to the left side of the plunger pump body, an oil storage box is fixedly connected to the top of the plunger barrel, conveying pipes are fixedly connected to the front face and the back face of the plunger barrel, and buffering plugs are fixedly connected to the interiors of the two conveying pipes. The tops of the two conveying pipes are fixedly connected with the surface of an oil storage box, and an oil injection assembly is arranged in the oil storage box. According to the utility model, the grease injection assembly is arranged, specifically, the push plate can extrude the grease after being pushed, and then the push plate is contracted and reset, so that the grease can continuously enter the conveying pipe, then the grease flows out through the flow dividing groove in the buffer plug and is in contact with the surface of the buffer plug, and the grease can be lubricated without the operation of a worker; and in addition, the buffer plug can be lubricated in time, the condition of dry friction is avoided, and the service life of equipment is prolonged.

This invention provides a construction method for precast hollow rigid piles with extendable wings, belonging to the field of precast hollow rigid pile construction. The method includes a rigid pile body, a hammer-limiting device, an impact bullet, and several extendable wings arranged in a circular array along the centerline of the rigid pile body. During construction, a hole is drilled in the ground, and grout is injected into the hole. The impact bullet is then inserted from the bottom of the rigid pile body upwards to the hollow bottom of the rigid pile body. The extendable wings are then temporarily fixed in an undeployed state. The rigid pile body with the temporarily fixed extendable wings is placed in the hole, with the grout covering the outer side of the rigid pile body. The hammer-limiting device is then used to repeatedly hammer the impact bullet at the bottom of the rigid pile body, causing the impact bullet to push the extendable wings located at the bottom of the rigid pile body to expand towards the outer wall of the rigid pile body, thereby achieving bottom expansion.