71results about How to "Low entry resistance" patented technology

The invention relates to the technical field of agricultural machinery, in particular to an integrated harvester of water chestnuts. The integrated harvester of the water chestnuts is characterized inthat the integrated harvester of the water chestnuts comprises a walking machine and a frame; the walking machine is connected with a hydraulic suspension system which is connected with an engine ofthe same; the hydraulic suspension system comprises a transmission case and a hydraulic cylinder; a spindle I is fixed on a smashing mechanism behind the walking machine in drive connection; a shovelboard is arranged at the entrance of a front chamber and in active fit with the front chamber; a push plate vibration mechanism is installed in the front chamber; a mud pump and a high pressure air pump are mounted on the frame and powered by a generator configured by the engine; a water and gas mixing cleaning mechanism is installed in a transport warehouse; a compensatory cleaning mechanism is arranged just below the water and gas mixing cleaning mechanism; a water outlet of the mud pump is connected with a water pipe; a pluarlity of nozzles are mounted on the water pipe; an air outlet of the high pressure air pump is connected with an appendix. The integrated harvester of the water chestnuts has the advantages of being clean after five times of cleaning during work process of the wholemachine, greatly reducing damage during harvesting, improving harvesting efficiency and reducing farmers' harvesting costs.

The invention relates to an equal-depth and wide seed opener for deep fertilization of wheat and belongs to the technical field of agricultural machinery. The opener comprises a front cutting edge, a fertilization pipe, a seed conveying pipe, a seed distributing box, and seedbed reconditioning machines for equal-depth seeding operation by a no-tillage and wide zone seeder. The front cutting edge and the fertilization pipe are integrally welded and soil in the operating process moves toward two sides to form a seed channel for the deep fertilization; the three-way seed conveying pipe is separated in the middle, so that the independent wide seeding at two sides is achieved; the seed distributing box and the seedbed reconditioning machines follow the fertilization pipe to move forward, the M type seed bed reconditioning machines are symmetrically arranged below the seed distributing box in forms of sharp corners, and a seed scattering plate on the bottom surface is provided with an ejecting bump. During work, the M type seed bed reconditioning machines on the bottoms of tow sides of the seed distributing box level the bottom of a trench with the uneven surface so as to form a wide dustpan-shaped plane with a trench cross section, and meanwhile, seeds fall into the seed distributing box by virtue of the three-way seed conveying pipe and are repeatedly ejected and uniformly scattered to a level seedbed by virtue of the seed scattering plate, so that the equal-depth uniform seeding is achieved.

The invention discloses a combined tillage machine for returning dry-land straw to the field by ploughing and rotary burying. The combined tillage machine comprises a ploughing device which comprisesa frame, the frame comprises length rods at two ends, a plurality of width rods are arranged at intervals between the two length rods, and one end of each width rod is provided with a grass twining prevention device. Furrow ploughs are arranged at the other ends of the width rods on two sides of the frame, a soil breaking plough is arranged at the other end of the width rod in the middle of the frame, supporting frames are symmetrically arranged on the length rod at one end of the frame, depth-limiting wheel mechanisms are mounted on the supporting frames, and the length rod at the other end of the frame is connected with one end of a rotary burying platform of a rotary burying device. A rotary burying cutter roller is arranged between bearing fixing frames and spirally provided with rotary blades, and an intermediate gearbox is arranged in the center of the rotary burying platform and provided with a universal joint. Compared with separate operations, the combined tillage machine hasadvantages that power consumption can be reduced, field operation can be completed in one time by a tractor, soil compaction is reduced, and labor efficiency improvement and labor cost reduction are realized.

The invention discloses a bionic curved-surface circular disc fertilization furrow opener. The bionic curved-surface circular disc fertilization furrow opener comprises a mounting frame, a curved-surface circular disc I and a curved-surface circular disc II, wherein the curved-surface circular disc I and the curved-surface circular disc II are mounted at the two sides of the mounting frame by shafts; the two curved-surface circular discs are mutually inclined and are mounted in an angular staggered manner; the curved-surface circular disc I and the curved-surface circular disc II have the same structures; the curved-surface circular disc I is composed of a plurality of curve-surface sector-shaped single bodies with the same structures; the curve-surface sector-shaped single bodies are tightly connected; and the outer edge of each curve-surface sector-shaped single body is of a tooth-shaped structure. According to the bionic curved-surface circular disc fertilization furrow opener, a disc surface adopts a bionic curved-surface structure and simulates shape characteristics of animal claws and toes, so that the soil digging performance is improved, the throwing rate is reduced, and capabilities of breaking stubbles and crushing soil are enhanced; the inner part of the disc surface is filled with annular nylon, and a water film structure at which the disc surface is in contact with the soil is damaged; and furrow opener cannot adhered to the soil and the passing ability of the furrow opener is enhanced.

The invention provides a transverse cutting type white asparagus harvesting device and method. The device comprises a shell, a fixed handle, a shell clamping plate, a clamping mechanism and a cutting mechanism. The fixed handle is used for holding a transverse cutting type white asparagus harvesting device body, and the white asparagus harvesting device body can be inserted into and pulled out of soil. The shell clamping plate is used for cooperating with the clamping mechanism to clamp stems of white asparagus. The clamping mechanism is used for clamping the stems of the white asparagus. The cutting mechanism is used for cutting roots of the white asparagus. A blade and the clamping plate act step by step, and white asparagus root cutting and stem clamping are carried out step by step. A transverse cutting harvesting mode is adopted, a cutting middle shaft rotates to drive the blade to rotationally cut the roots of the white asparagus, and a clamping middle shaft rotates to drive the clamping plate to rotate to clamp the white asparagus. Compared with manual white asparagus harvesting, a plurality of complex harvesting steps are omitted, and the device is convenient to use, low in cost and convenient to maintain.

The invention provides a traction type cyperus esculentus harvester, belongs to the technical field of agricultural machinery, and particularly relates to a cyperus esculentus harvester. The tractiontype cyperus esculentus harvester comprises a main machine frame, wherein a transmission system, a rotary digging device, a digging shovel, an elevating net chain assembly, a travelling wheel combination, a dual-drum threshing device, a vibrating screen assembly, a horizontal conveying device, an impurity sucking fan, a belt elevator and a grain tank are arranged on the main machine frame; the digging shovel is mounted at the rear part of the rotary digging device; the elevating net chain assembly is obliquely arranged on the main machine frame, and two ends of the elevating net chain assemblyare adjacent to the digging shovel and the dual-drum threshing device; the vibrating screen assembly is arranged below the dual-drum threshing device; the horizontal conveying device is located outside an outlet of the vibrating screen assembly; the impurity sucking fan is arranged above the horizontal conveying device; and the lower end of the belt elevator is located below the front part of thehorizontal conveying device, and the upper end of the belt elevator extends to the edge of a grain tank. Through the adoption of the traction type cyperus esculentus harvester disclosed by the invention, the harvesting efficiency is notably improved, the machine harvesting loss is reduced, and operating cost is saved.

The invention provides a tooth-toe type rotary tillage knife and belongs to the technical field of agricultural machines. The tooth-toe type rotary tillage knife is composed of a knife handle and a knife body. The knife body comprises a lateral cutting surface and a front cutting surface, the lateral cutting surface is provided with a lateral cutting edge of a trapezoidal toothed structure, the front cutting surface is provided with a front cutting edge of a multi-toe structure, each toe is rectangular, the ratio of length to width is 2-6, the toe widths are sequentially declined in an arithmetic sequence, the toe tip structure is trapezoidal, and every two toes are in transitional connection through an arc. According to the tooth-toe type rotary tillage knife, on the premise that the normal work of the rotary tillage knife is ensured, the penetration resistance of knife blades can be reduced, the anti-grass-winding capacity is high, the soil cutting mode of the front cutting surface is changed into a multi-narrow-blade combined synergistic soil cutting mode from a wide-blade soil cutting mode, the soil failure form is transformed into a combined crescent failure form from a wedge-shaped failure form, and the size of the toe-type structure can be changed according to different soil viscosities, so that the soil cutting resistance is effectively reduced, and the aims of resistance reduction and consumption reduction of the rotary tillage knife are achieved.

The invention relates to a multifunctional rotary cultivator cutter shaft assembly, and belongs to the technical field of agriculture rotary cultivator fittings. The multifunctional rotary cultivator cutter shaft assembly comprises a cutter shaft tube, plough cutter bases and rotary cutters; a plurality of support rings are mounted at intervals on the cutter shaft tube; the plurality of plough cutter bases are uniformly distributed at intervals on the circumference surface of the cutter shaft tube and between the support rings; the rotary cutters are movably mounted inside the plough cutter bases; a plurality depth limiting rods are uniformly distributed on the circumferences of the support rings; protection covers are respectively arranged on the cutter shaft tube at two end tips of each depth limiting rod. The rotary cutters of the cutter shaft assembly are mounted in a spiral manner, the blade penetration resistance is small, and ploughed soil is not hardened. Due to adoption of the protection covers, an assembling bearing can be effectively prevented from being wound by weeds, and thus the rotary plough effect can be greatly improved. The multifunctional rotary cultivator cutter shaft assembly is applicable to rotary plough operation of dry farmlands and rotary plough operation of paddy fields, and thus the investment cost of agriculture machines can be lowered.

The invention discloses a method and device for removing grassland weeds-iridaceous plants. In the method, cutters on both sides are used for obliquely cutting roots in soil in turn from different cross sections. The device comprises a frame, wherein the frame is provided with a transverse positioning hydraulic cylinder and a sliding plate; two ends of the sliding plate are arranged on the frame through slide blocks; the transverse positioning hydraulic cylinder is connected with one slide block; a pair of positive bars is arranged in the center of the sliding plate; the left side and the right side of each positive bar are provided with a group of angle adjusting devices respectively; the two groups of angle adjusting devices are arranged front and back in a staggered way; each group of angle adjusting devices is connected with a working hydraulic cylinder respectively; the lower end of each working hydraulic cylinder is connected with a cutter saddle; a hydraulic motor is fixedly connected with the cutter saddle and is connected with a cutter head; 3-4 cutters are uniformly distributed in the circumferential direction of the cutter head; and a left group of cutters and a right group of cutters are obliquely and oppositely arranged in a V shape. A practicable scheme is provided for the removal of iridaceous plants, and the method is suitable for improving grasslands degraded by heavy weed growth, is accordant with the concept of agricultural sustainable development, and has an extensive application prospect.

The invention relates to the field of agricultural machinery and especially relates to a biarc eagle nozzle dibbling compound device applied to a seeder dibbling device. The biarc eagle nozzle dibbling compound device mainly comprises a movable eagle nozzle, a fixed eagle nozzle and an eagle nozzle starting / stopping device, wherein the front end of the moveable eagle nozzle is arranged as a slot-shaped end part; the front end of the fixed eagle nozzle is also arranged as the slot-shaped end part; the moveable eagle nozzle is hinged with the fixed eagle nozzle; the slot-shaped end part of the moveable eagle nozzle is included in the slot-shaped end part of the fixed eagle nozzle; after the movable eagle nozzle and the fixed eagle nozzle are buckled together, a seed putting cavity is formed; the eagle nozzle starting / stopping device is mounted between the movable eagle nozzle and the fixed eagle nozzle and is used for opening or closing the movable eagle nozzle and the fixed eagle nozzle. The biarc eagle nozzle dibbling compound device is reasonable in structure, economical and practical, flexible in exchange, suitable for planting of different crops, applicable to mulching films in different thicknesses, capable of smoothly breaking the film, centralized in dibbling, free from malposition and capable of increasing the dibbling quality and greatly saving the production cost.

The invention discloses a traction-type continuous punching and surface profiling leveling device. The device comprises a two roller support frames provided with pillow block bearings, a plurality of punching circular pipes and a leveling roller provided with connection shafts at the two ends; the connection shaft at two ends are respectively arranged in the two pillow block bearings, the plurality of punching circular pipes are arranged in multi-head spiral linear distribution in the leveling roller, wherein a notch of each punching circular pipe is an angular cut, and the angular cut surfaces of the plurality of punching circular pipes are in the same direction. The punching circular pipes in the invention are distributed on the leveling roller according to the multiple spiral patterns; in the punching process, at least two punching circular pipes are inserted into the soil, and the punching circular pipes in left and right symmetrical position penetrate into the soil simultaneously, so as to effectively reduce the shock load and the vibration caused by uneven stress on the punching device from the left and right during the penetration of the punching circular pipes into the soil.

The invention relates to the technical field of agricultural machinery and particularly relates to a rotary tiller. The rotary tiller comprises a vehicle frame, a power traction device and a rotary tillage device, wherein the power traction device is arranged in the front of the vehicle frame, and the rotary tillage device is arranged in the back of the vehicle frame; and the rotary tillage device comprises a transmission frame, a transmission mechanism, a rotary knife assembly and a protective hood, the transmission frame is fixedly connected onto the vehicle frame, the transmission mechanism is arranged in the transmission frame and drives the rotary knife assembly to rotate, the rotary knife assembly comprises a knife shaft and rotary knives rotating along with the knife shaft, cutting knives are arranged in the protective hood, each cutting knife is arranged between every two adjacent rotary knives, one end of each cutting knife is connected with a reciprocating push mechanism, the other end of each cutting knife is pointed to the axis of the knife shaft, and the reciprocating push mechanisms are arranged at the outer side of the protective hood and drive the cutting knives to reciprocate along the radial direction of the knife shaft. According to the rotary tiller, soil blocks or weeds attached to the rotary knives can be effectively stripped or chopped, so that the hacking performance and rotary tillage effect are improved; and the depth of soil piercing of the rotary knives can be adjusted, so that the resistance to the soil piercing of the rotary knives is low, and the power consumption of cutting and soil crushing of the rotary knives is lowered.

The invention relates to the technical field of agricultural machinery, in particular to a residual film bundling and recycling machine which comprises a main machine frame, walking wheels, a draught fan arranged on the main machine frame, an air conveying channel, a depth limiting roller and film raking teeth and further comprises a sectional type picking-up roller combined device and a residual film recycling and automatic bundling device which are arranged on the main machine frame. The plastic film residue recycling and automatic bundling device comprises two case half shells which are buckled together, and a belt pressurizing and impurity removing combined device is arranged in each case half shell. The sectional type pick-up roller combined device mainly comprises a sectional type pick-up roller and a film connecting tooth device. The residual film bundling and recycling machine is simple in structure, economical and practical, and when the residual film is recycled and bundled, the sectional type picking roller combined device is utilized, so that the soil penetrating resistance of elastic teeth is greatly reduced, and the film recycling and demolding operation efficiency can be effectively improved; and by means of the plastic film residue recycling and automatic bundling device, the working quality and efficiency of bundling operation of the whole residual film recycling machine are greatly improved.

The invention relates to crop harvesting equipment and in particular relates to a root tuber harvester comprising a rack, a digging device, a conveying device and a stacking device. The digging device, the conveying device and the stacking device are all arranged on the rack; the conveying device is arranged between the digging device and the stacking device; the digging device is formed by two sharp shovels and a sharp shovel distance adjusting device; the sharp shovels are connected with the sharp shovel distance adjusting device; the sharp shovel distance adjusting device has slide sleeves, fixing racks, L-shaped connection rods, connection rods and rotary discs (II); the sharp shovels are respectively fixed to the slide sleeves; two ends of the fixing rack are fixedly connected with the rack; one ends of the slide sleeves are in a slideable connection with the fixing rack; the sharp shovels are fixed on the other ends of the slide sleeves; the external sides, which faces the rack, of the slide sleeves are connected with the connection rods via the L-shaped connection rods; the other ends of the connection rods are eccentrically connected with the rotary discs (II); right-angle corners of the L-shaped connection rods are hinged with the rack; the rotary discs (II) are fixed on rotary discs (I); and the rotary discs (I) are mounted on the rack. Small soil-penetrating resistance is provided; a collection tank can be automatically exchanged without shutdown when the collection tank is filled, so harvesting efficiency of the harvester can be greatly improved.

The invention discloses a hydraulic impact type hole digging, fertilizing and earthing machine used in orchards. The machine comprises a rack (1), a hole digging and earthing device, a fertilizing device and a walking device, wherein the hole digging and earthing device is fixed on the rack (1) via bolts; the fertilizing device is arranged on the right side of the rack (1); the walking device is welded below the rack (1); a hydraulic impact mechanism (6) is arranged in the hole digging and earthing device; the walking device comprises universal wheels (15) and universal wheel supporting beams (16); the universal wheel supporting beams (16) are horizontally placed and welded below the rack (1); the universal wheels (15) are arranged below the universal wheel supporting beams (16). Relative to existing hole digging, fertilizing and earthing all-in-one machines used in orchards, the hydraulic impact type hole digging, fertilizing and earthing machine used in orchards has the advantages that the hydraulic impact mechanism can apply high-frequency impact energy on the hole digging and earthing device, so that the resistance is reduced during hole digging, thus improving the hole digging efficiency; through reasonable layout of the walking mechanism, the whole machine is more stable.

The invention relates to an anti-blockage underground deep layer irrigation device with a flushing function, and belongs to the technical field of agricultural water-saving irrigation. The anti-blockage underground deep layer irrigation device comprises a water irrigation device and a soil entering device, wherein the water irrigation device and the soil entering device are connected with a soil entering sleeve pin hole formed in a soil entering sleeve and a water irrigation post body pin hole formed in a water irrigation post body through positioning pins. The anti-blockage underground deep layer irrigation device has the advantages that the utilization efficiency of irrigation water is improved, the problem that the existing pluggable water irrigation device cannot be inserted into the deep layer underground soil is solved, the device blockage possibility is reduced, the operation is simple, the manual operation quantity is smaller, the anti-blockage underground deep layer irrigation device is suitable for popularization and application in a wide range, the installation of the whole device is convenient, the dismounting is also very convenient, the device maintenance is simpler, and the maintenance cost is lower.

The invention relates to a seeding nozzle which comprises a pair of half bodies, and the two half bodies are provided with body parts correspondingly extending out. The seeding nozzle is characterized in that the two half bodies can do relative reciprocating rectilinear motion, and the relative reciprocating rectilinear motion of the two half bodies enables the body parts of the two half bodies to be opened and closed in a relative translation manner in the working process. In addition, the invention also relates to a seeding assembly based on the same conception, as the body parts of the two half bodies of the seeding nozzle are opened and closed in a manner of relative translation and reciprocating rectilinear motion, compared with the closest prior art, the seeding assembly disclosed by the invention can more easily realize synchronous work among a plurality of seeding assemblies.

The invention belongs to the field of fittings of a rotary blade, and particularly discloses a rotary blade. The rotary blade comprises a blade back, a blade edge part and a blade holder part, wherein the blade back and the blade edge part are curved, the blade edge part is positioned at the external curved part of the blade back, and the blade edge part is cuneiform. The rotary blade has the characteristics of being small in buried resistance and capable of cutting weeds.

The invention discloses an adjustable underground alternate-irrigation device. The adjustable underground alternate-irrigation device comprises a cylinder, a soil breaking awl, an irrigation mechanism, water supplying pipe fittings, an irrigation operating system and an irrigation direction operating mechanism, wherein the soil breaking awl is installed at the lower end of the cylinder, the irrigation mechanism is arranged in the cylinder body, the water supplying pipes are communicated with the irrigation mechanism, the irrigation operating system and the irrigation direction operating mechanism are connected with the irrigation mechanism, the irrigation mechanism comprises an upper irrigation device and a lower irrigation device, the upper irrigation device and the lower irrigation device are respectively provided with two irrigation directions, and water is supplied in the four irrigation directions of the two irrigation devices through independent water pipes. According to the adjustable underground alternate-irrigation device, the underground alternate irrigation mode is adopted, the four irrigation directions are available, the vertical distances between the two irrigation directions of the upper irrigation device and the two irrigation directions of the lower irrigation device can be adjusted, the irrigation amount in each irrigation direction can be adjusted, the irrigation sequence of the four irrigation direction can be changed freely, irrigation can be conducted in one upper irrigation direction and one lower irrigation direction at the same time, irrigation can also be conducted independently in each irrigation direction, the operability is high, and the irrigation water utilization rate can be effectively increased.

A multifunctional fertilizing apparatus is formed by a fertilizer container bag, a left fertilizing tube, a right fertilizing tube, a left regulating valve, a right regulating valve, a left digging fertilizing shovel, a right digging fertilizing shovel, and can be operated only through one person. The front surface of the fertilizer container bag is provided with braces, and the upper portion and the rear surface of the fertilizer container bag are respectively provided with fastening bands to tension the fertilizer container bag, so the fertilizer container bag can be fastened on the back of the person; and the lower portion of the fertilizer container bag is connected with the left fertilizing tube and the right fertilizing tube respectively. The left fertilizing tube and the right fertilizing tube are respectively provided with one regulating valve, and the lower end of each of the left fertilizing tube and the right fertilizing tube is provided with one digging fertilizing shovel. When the apparatus is used, the apparatus can be directly obliquely inserted to soil if the soil is loose, the apparatus can be inserted to soil through stepping the fertilizing shovels by feet when the soil is hardened, a fertilizer enters soil through the pressing and releasing of the regulating valves by thumbs, and soil automatically covers the fertilizer if the digging fertilizing shovels are backward upwardly pulled out. The fertilizing tubes are directly used during the point-shaped or strip-shaped fertilization. The digging fertilizing shovels are overturned 180DEG to form an upward back in order to carry out band-shaped fertilization. The multifunctional fertilizing apparatus has the advantages of multifunctional property, high speed, high efficiency, fertilizer saving, and fertilizer utilization rate increase.

The invention discloses an easy-to-install rotary cultivator cutter shaft assembly comprising a shaft pipe. Two ends of the shaft pipe are provided with a pipe through hole; internal baffle blocks are evenly welded on the peripheral inner wall of the pipe through hole; thread holes are formed on the peripheral outer wall of the pipe through hole; an external ring sleeve and a fixing column are vertically welded in the center of the other side wall of a connection welding member; internal baffle grooves are evenly formed in the side wall of the fixing column; the internal baffle blocks are placed in the internal baffle grooves; and an end port of a bolt passes through the thread hole and extends to the through hole. A pipe orifice is right clamped in the annular groove, so weeds cannot enter a seam between the shaft head and the shaft pipe; weed winding can be avoided and service life of the cutter shaft can be prolonged; the shaft pipe is in a threaded connection with the shaft head; the structure can be conveniently assembled and disassembled and low manufacturing cost is achieved; a loose problem can be prevented; the internal baffle blocks are embedded into the internal baffle grooves; the rotary cutters are staggered, so soil-penetrating resistance of blades can be reduced; and the soil after the rotary cultivation cannot knot, so rotary cultivation effect can be greatly improved.

The invention discloses an intelligent cyperus esculentus inter-row weeding machine with an automatic row alignment function. The machine comprises a box body and a stirring box, the upper side wall of the box body is fixedly connected with the lower side wall of the stirring box, a first motor is fixedly connected between the upper side wall and the lower side wall of an inner cavity of the box body, and the output end of the first motor is fixedly connected with a first rotating rod through a coupler. The end, away from the first motor, of the first rotating rod is rotatably connected with the left side wall of the inner cavity of the box body through a bearing, and a first belt wheel is fixedly connected to the surface of the first rotating rod. The invention relates to the technical field of cyperus esculentus. According to the intelligent cyperus esculentus inter-row weeding machine with the automatic row alignment function, the automatic row alignment function of the intelligent cyperus esculentus inter-row weeding machine in the advancing process is achieved, the automation level and the operation performance of cyperus esculentus weeding machinery are further improved, pesticides are sprayed while a weeding cutter set works, weeding is more thorough, and the weeding effect is improved. Operation is simple and convenient, and wide application is facilitated.

The invention relates to the field of building, in particular to a drain board insertion mechanism, comprising an insertion-sleeving pile pipe internally provided with a board guide cavity, an inverse-taper pile head located at the bottom of the insertion-sleeving pile pipe, two rows of press plates symmetrically hinged to a cavity wall of the board guide cavity and used for pressing a drain board, and a loosening and tightening assembly connected with the press plates and used for enabling the press plates to rotate around hinge points, wherein the inverse taper pile head comprises two pile head plates which are partially overlapped and of which the lower ends can be closed or opened, and the loosening and tightening assembly comprises two connecting rods respectively penetrating through the two rows of press plates, and a synchronous connecting plate detachably connected to the tops of the two connecting rods. The drain board insertion mechanism is simple in structure, low in cost, convenient to operate, high in work efficiency, stabling in insertion quality, small in soil entering resistance, good in safety, reliability and universality, wide in application range, not easy to damage and small in replacement cost after being damaged.

The invention relates to the field of building, in particular to a drain board arrangement device, comprising an insertion-sleeving pile pipe internally provided with a board guide cavity, an inverse-taper pile head located at the bottom of the insertion-sleeving pile pipe, two rows of press plates for pressing a drain board, and a loosening and tightening assembly connected with the press plates and used for enabling the press plates to rotate around hinge points, wherein the inverse taper pile head comprises two pile head plates which are partially overlapped and of which the lower ends can be closed or opened, and the loosening and tightening assembly comprises two connecting rods respectively penetrating through the two rows of press plates, and a synchronous connecting plate detachably connected to the tops of the two connecting rods. The drain board arrangement device is simple in structure, low in cost, convenient to operate, high in work efficiency, stabling in insertion quality, small in soil entering resistance, good in safety, reliability and universality, wide in application range, not easy to damage and small in replacement cost after being damaged.

The invention discloses a subsoiling and fertilizing machine for tea gardens. The machine comprises a rack; a fertilizer box is arranged above the rack; a depth wheel and a subsoiler are arranged under the rack; a gearbox is also installed above the rack; one output end of the gearbox is connected to a tractor; other output ends of the gearbox are connected to a fertilizer stirring device inside adischarge port of the fertilizer box; one end of a fertilizer delivery pipe is connected to the discharge port and the other end extends to a side, back to the soil, of the subsoiler. The subsoilingand fertilizing machine for tea gardens of the invention has the structure matched with the size of the tea tree rows, and is suitable for working across the tea tree. The structure of the whole machine is compact, and the distance between the subsoiling and fertilizing ditch and the root of the tea tree is appropriate, which is not easy to damage the root, but also has a strong improvement on thesoil structure and fertility of the root. The whole machine and the tea garden tractor are connected by hooking, which is convenient for assembly and disassembly. The structure of the whole machine is firm, the strength and rigidity are very high, and four grooves can be operated at one time, and the work efficiency is high.

The invention discloses an easy-to-install rotary cultivator cutter shaft assembly comprising a shaft pipe. Two ends of the shaft pipe are provided with a pipe through hole; internal baffle blocks are evenly welded on the peripheral inner wall of the pipe through hole; thread holes are formed on the peripheral outer wall of the pipe through hole; an external ring sleeve and a fixing column are vertically welded in the center of the other side wall of a connection welding member; internal baffle grooves are evenly formed in the side wall of the fixing column; the internal baffle blocks are placed in the internal baffle grooves; and an end port of a bolt passes through the thread hole and extends to the through hole. A pipe orifice is right clamped in the annular groove, so weeds cannot enter a seam between the shaft head and the shaft pipe; weed winding can be avoided and service life of the cutter shaft can be prolonged; the shaft pipe is in a threaded connection with the shaft head; the structure can be conveniently assembled and disassembled and low manufacturing cost is achieved; a loose problem can be prevented; the internal baffle blocks are embedded into the internal baffle grooves; the rotary cutters are staggered, so soil-penetrating resistance of blades can be reduced; and the soil after the rotary cultivation cannot knot, so rotary cultivation effect can be greatly improved.