37 results about "Sharp tooth" patented technology

A thread rolling plate for producing self-tapping and self-locking screws comprises a main thread plate and an auxiliary thread plate. Working faces are arranged on the main tooth plate and the auxiliary tooth plate, and each working face is provided with a collecting part and a shaping part. The shaping part is provided with a high thread groove, a low thread groove, an upper square tooth groove and a lower square tooth groove. Thread rolling edges are arranged between the high thread grooves, the upper square tooth groove comprises a first tooth groove and a second tooth groove, and the lower square tooth groove comprises a third tooth groove and a fourth tooth groove. The high thread grooves and the low thread grooves are formed in the working face, two kinds of threads with different heights are formed at a time, and the self-locking performance of the screw is enhanced. The upper square tooth groove and the lower square tooth groove form a first self-locking block, a second self-locking block, a third self-locking block and a fourth self-locking block in the tooth rolling process, and the self-locking performance is improved. The sharp tooth groove and the flower tooth part are arranged on the main tooth plate, so that the cutting and chip removal performance of the screw is improved. The thread rolling plate can be used for machining screws with threads of various functions and specifications under one-time thread rolling, and the machining efficiency is greatly improved.

1. The name of this design product: Kitchen Knife (Sharp Tooth Series). 2. Purpose of this design product: used for cutting and preparing food in the kitchen. 3. The key point of the design of this product lies in its shape. 4. The picture or photo that best illustrates the key points of the design: main view. 5. The design points of the left view and the right view have been reflected in the stereoscopic figure 1 and the stereoscopic figure 2 respectively, and the left view and the right view are omitted.

1. The name of this design product: sharp-toothed cutter disc. 2. Purpose of this design product: This design product is used for grinding coffee beans. 3. The key point of the design of this product lies in its shape. 4. The picture or photo that best illustrates the key points of the design: Design 1 Stereoscopic Drawing 1. 5. Designate Design 1 as the base design.

The utility model discloses a sharp-tooth step type drill bit which comprises a drill bit base body and a drill bit crown arranged at the top of the drill bit base body. A plurality of groups of blades are arranged on the drill crown at intervals, three groups of cutting teeth are arranged on each group of blades, the three groups of cutting teeth are arranged in a stepped manner from top to bottom, the widths of the cutting teeth are gradually increased from top to bottom, a water outlet is formed in the outer wall of the drill crown between adjacent blades, and an inner water tank is formed in the inner wall of the drill crown between adjacent blades. And the inner water tank is connected with the water outlet. The drill bit has the advantages that the drill bit effectively cuts into rocks to form volume breaking, the slipping phenomenon can be reduced, and the drilling perpendicularity and the drilling efficiency can be improved; the heat on the cutting teeth is taken away in time, the temperature of the drill bit is reduced, and the service life of the drill bit is prolonged.

The application discloses a construction method for removing concrete around a cross-shaped steel plate joint of a diaphragm wall, which comprises the following steps: drilling a hole; grabbing a groove; installing a soil retaining member; tightly attaching a sharp tooth to the cross-shaped steel plate joint; moving up and down a grab bucket of a grooving machine to break the whole concrete structure around the cross-shaped steel plate joint; hanging a wall shoveling device on the grab bucket of the grooving machine, moving up and down the grab bucket of the grooving machine to shovel off the remaining concrete around the cross-shaped steel plate joint; replacing the wall shoveling device with a wall brushing device, tightly attaching the wall brushing device to the cross-shaped steel plate joint by the grab bucket of the grooving machine, and moving up and down the grab bucket of the grooving machine to completely remove the residual concrete around the cross-shaped steel plate joint. The construction method for removing the concrete around the cross-shaped steel plate joint of the diaphragm wall is suitable for removing the concrete around the cross-shaped steel plate joint of the diaphragm wall in a narrow space, the steps are reasonably designed, the steps are closely combined, the concrete around the cross-shaped steel plate joint of the diaphragm wall is completely removed, the construction difficulty is reduced, and the construction efficiency is improved.

Apparatus, consisting of a hinge (84) defining a hinge axis (88), and a pair of opposing jaws (80A,80B), including a movable jaw and a fixed jaw having a predetermined part radiopaque, so that the fixed jaw location is identifiable from a fluoroscopic image of the fixed jaw. The opposing jaws terminate at proximal and distal regions, and the proximal regions are connected to the hinge so that the movable jaw rotates about the hinge between a closed state and an open state. The jaws are curved in planes parallel to the hinge axis, and terminate in narrowed ends at the distal regions, so that in the closed state the jaws grip sections of vertebrae. The apparatus also has a support structure (60) that retains the hinge and the pair of opposing jaws, and a multiplicity of sharp teeth (98) disposed on respective inner surfaces of the opposing jaws.

The present invention relates to the technical field of sealing pipe joints, and in particular to a sealing flange joint for an R744 refrigerant high-pressure air-conditioning pipeline, comprising a male joint, a female joint, a gasket and a sealing ring. The male joint is fixedly mounted on the end of pipe one, and the female joint is fixedly mounted on the end of pipe two. A first convex ring is protruding from the end face of the male joint, and at least one circle of first sharp teeth is provided on the end face of the first convex ring. A sealing countersunk hole is provided on the end face of the female joint, and a sealing ring mounting groove is provided on the hole wall of the sealing countersunk hole, and at least one circle of second sharp teeth is provided on the bottom surface thereof. The gasket is made of soft metal, and the sealing ring is mounted in the sealing ring mounting groove and sleeved on the first convex ring. The male joint and the female joint are tightly connected, and a soft and hard dual combination seal is realized at the same time, which greatly improves the sealing performance and safety performance of the air-conditioning pipeline, adapts to the sealing connection under high vibration conditions, and the gasket deforms evenly, meeting the use requirements of convenient disassembly and assembly in a limited space, and the gasket or the sealing ring is easy to replace.

The utility model discloses a belt sander sharp-tooth rubber wheel for polishing, which belongs to the technical field of gears and comprises a hub, rubber sharp teeth are detachably sleeved on the periphery of the hub, and each rubber sharp tooth comprises a tooth tip portion and a pressing portion. A boss is integrally formed on the inner side wall of the tooth tip part, one side of the hub is inserted into the boss, the other side of the hub is connected with a pressing part through a quick release assembly, and the outer side wall of the pressing part abuts against the inner side wall of the tooth tip part. And a plurality of anti-rotation blocks are arranged between the tooth tip part and the hub. According to the sharp-tooth rubber wheel of the belt sander for polishing, the sharp-tooth rubber which is abraded unevenly or damaged can be replaced conveniently, so that the service life of the sharp-tooth rubber wheel is prolonged, and the using effect of the sharp-tooth rubber wheel is guaranteed.

The utility model discloses an easy heat dissipation dry cut diamond saw blade, which comprises a base body, a mounting hole is arranged at the center of the base body, a plurality of heat dissipation holes are arranged around the mounting hole, an edge of the base body is provided with a cutting part, the cutting part is in the shape of a ring body, the thickness of the cutting part is greater than that of the base body, the front and back surfaces of the cutting part are both provided with a plurality of annular arrayed protrusions one and protrusions two, the protrusions one and the protrusions two are both polygons, the protrusions one are in the shape of a bend, the bending angle is 90-150 degrees, the edge of the bending part one of the protrusions one extends along the edge of the cutting part, the protrusions two are located on the inner side of the protrusions one, and one corner of the protrusions two extends to the inner edge of the cutting part. The protrusions one and the protrusions two on the cutting part are mutually matched and arranged in an annular array, the sharp teeth at the bending part one of the protrusions one can improve the cutting sharpness of the edge of the cutting part, the groove between the protrusions one and the protrusions two can form a blade edge, the biting force of the surface of the cutting part is improved, and the groove is also convenient for chip removal and heat dissipation.

The invention belongs to the technical field of power distribution cabinet machining, and particularly relates to a power distribution cabinet plate cutting device which comprises a workbench, a disc cutting knife is rotationally arranged on the table top of the workbench, a rotating shaft is rotationally arranged in the workbench, and the disc cutting knife is fixed to the surface of the rotating shaft. Through composite cooling of the middle part and the cutting part of the disc cutting knife, the working temperature of the disc cutting knife can be effectively controlled, so that the tooth blade of the disc cutting knife always keeps stable hardness performance, the bonding wear between the tooth blade of the disc cutting knife and a plate is reduced, the passivation speed of the cutting edge is delayed, and meanwhile, the service life of the cutting edge is prolonged. According to the composite cooling design, overall heat accumulation of the disc cutting knife is restrained through middle pre-cooling, the temperature of a core cutting area is directly reduced through precise cooling of the cutting part of the disc cutting knife, the abrasion rate of the cutting knife is greatly reduced under the dual action, the disc cutting knife keeps sharp tooth blades, and the cutting efficiency is improved. And the disc cutting knife keeps precise shearing, and the stability of the finished product rate of cut plates is kept.

The invention discloses a slip and a surface hardening process thereof, and belongs to the technical field of oil-gas exploration, development and drilling engineering equipment. The surface hardening process of the slip comprises the following steps: carrying out thermal refining on a slip base body blank; and after thermal refining is completed, the slip is subjected to ion nitriding treatment. The invention further discloses the slip. According to the surface hardening process of the slip, a brand-new ion nitriding process is adopted for one-time hardening forming, the size precision is enough, the slip can be put into application without finish machining, and therefore the problem that the carburizing treatment surface hardening yield of the cylindrical sharp tooth slip is extremely low is solved; and meanwhile, laser quenching and common ion nitriding tooth tip point ablation are avoided, the occurrence of a soft belt at the tooth tip part is greatly eliminated and weakened, and the hardness and uniformity of the tooth tip are guaranteed.

The utility model belongs to the technical field of beverage preparation, and particularly relates to a beverage preparation emulsification tank which comprises a tank body, an inner container body is arranged on the inner wall of the tank body, a plurality of sharp teeth are arranged on the inner wall of the inner container body in an array mode, and a tank cover is arranged at the top of the tank body. The liquid pumping power source is arranged at the top of the tank cover; the liquid pumping pipe fitting is arranged on the peripheral side wall of the tank body; the rotary liquid spraying pipe fitting is rotatably arranged below the middle part of the tank cover; the driving assembly is arranged at the top of the tank cover and is used for solving the problem that the mixing and emulsifying processing requirements of the beverage cannot be met due to the fact that the beverage in the emulsifying tank is easily dispersed unevenly, precipitated and layered.

A sheet pearl wool cutting working table comprises a rack and a table top plate arranged on the rack, and a material cutting device, a material spreading device, a cutting operation device and a sharp tooth chain dragging device used for dragging pearl wool are arranged on the rack. According to the pearl wool sheet stacking and cutting device, mechanical discharging and cutting of pearl wool coiled materials can be achieved, meanwhile, pearl wool sheets cut according to a certain length are stacked and then conveyed to a cutting station to be cut, and the pearl wool sheet stacks can be kept stable in the cutting process of the cutting station; and it is guaranteed that the size of a cut product is accurate, and the quality of the cut product is improved.

The invention relates to the technical field of medical equipment, in particular to a damping structure and an injection pen, the damping structure comprises a jumping ring, a knob, a force applying piece and a fixing buckle, and a through hole is formed in the rear side face of the knob around the axis of the knob and penetrates through the knob in the front-back direction; the end, relative to the first direction, of the penetrating hole is a first end, the end, relative to the second direction, of the penetrating hole is a second end, the first end is provided with a first abutting part, the front side face of the jumping ring is provided with first abutting teeth around the axis of the jumping ring, the front end of each first abutting tooth is provided with a sharp tooth part and a flat tooth part, and the tooth face, relative to the second direction, of each flat tooth part is provided with a first tooth abutting part. The sharp tooth part is provided with a second tooth abutting part, the rear side face of the fixing buckle is provided with a plurality of second abutting teeth around the axis of the fixing buckle, the knob is rotationally arranged at the rear end of the fixing buckle, the jumping ring is rotationally arranged at the rear end of the knob, the first abutting teeth penetrate through the penetrating hole, and the force applying piece is arranged at the rear end of the jumping ring. In conclusion, the damping structure has the effect of effectively improving the use experience and the operation comfort of a user.

The invention discloses a fishing line assembly with an anti-cutting line safety structure, which comprises a switching component, a first anti-cutting line, a second anti-cutting line and a fishhook body, the switching component connects a fishing main line with the first anti-cutting line and the second anti-cutting line, and the other end of the first anti-cutting line and the other end of the second anti-cutting line are connected with a handle part of the fishhook body; the vertical length of the first anti-cutting line is smaller than that of the second anti-cutting line; the first anti-cutting wire and the second anti-cutting wire are connecting wires with tensile force. According to the fishing hook, when a fished object bites a hook and then gets rid of the fished object, the first anti-cutting line is straightened, so that the anti-cutting strength is reduced, after the fished object is instantly cut off due to impact of sharp teeth, the second anti-cutting line which is not straightened can still guarantee effective connection of the fishing hook body and the switching component, the fished object is prevented from escaping, the fishing rate is effectively increased, use is easy and convenient, and the fishing hook is worthy of popularization and application. And the interestingness of fishing is greatly improved.

The utility model belongs to the technical field of laser cutting, and particularly relates to a laser cutting workbench which comprises a workbench body, a blanking opening is formed in the upper side face of the workbench body in a penetrating mode, rack mechanisms are arranged on the upper side of the blanking opening of the workbench body at equal intervals, side rails are symmetrically arranged on the two sides of the upper side face of the workbench body, and electric sliding tables are arranged on the upper sides of the side rails in a sliding mode. A transverse rail is arranged on the upper sides of the sides, close to each other, of the electric sliding tables, and a laser generator is slidably arranged on the upper side of the transverse rail. When upward sharp teeth of the triangular tooth pieces of the rack mechanism are damaged, only the nut needs to be screwed off, the screw rod is pulled out, the intact sharp teeth of the triangular tooth pieces face upwards, then the screw rod is inserted back again, and the fixing nut is screwed down, the rack mechanism does not need to be wholly replaced, the single triangular tooth piece can be rapidly detached to be replaced, and each triangular tooth piece is provided with three sharp teeth, so that the replacement is convenient. The rack mechanism can be replaced and used three times, replacement and maintenance convenience of the rack mechanism is improved, and the use effect of the rack mechanism is greatly improved.

Apparatus, consisting of a hinge (84) defining a hinge axis (88), and a pair of opposing jaws (80A, 80B), including a movable jaw and a fixed jaw having a predetermined part radiopaque, so that the fixed jaw location is identifiable from a fluoroscopic image of the fixed jaw. The opposing jaws terminate at proximal and distal regions, and the proximal regions are connected to the hinge so that the movable jaw rotates about the hinge between a closed state and an open state. The jaws are curved in planes parallel to the hinge axis, and terminate in narrowed ends at the distal regions, so that in the closed state the jaws grip sections of vertebrae. The apparatus also has a support structure (60) that retains the hinge and the pair of opposing jaws, and a multiplicity of sharp teeth (98) disposed on respective inner surfaces of the opposing jaws.

The utility model discloses a hard alloy circular saw blade for a trephine, which relates to the technical field of cutting and comprises a trephine body, a plurality of groups of saw teeth arranged circumferentially at equal intervals are arranged on the trephine body, each saw tooth consists of a left helical tooth, a right helical tooth and a sharp tooth, the right helical tooth is positioned between the left helical tooth and the sharp tooth, and the cutting edge angle epsilon of the left helical tooth and the right helical tooth is 5 degrees. The tool cutting edge angle epsilon of the sharp teeth is 15 degrees, the sharp teeth are in left-right inclined symmetrical design, centripetal angles with Tp being 1 degree are designed on the side faces of the left inclined teeth, the right inclined teeth and the sharp teeth, and circumferential angles with Tr being 3 degrees are designed on the side faces of the left inclined teeth, the side faces of the right inclined teeth and the side faces of the sharp teeth. Due to the design of the tool cutting edge angle, the cutting amount can be uniformly distributed during cutting, the cutting efficiency is improved, meanwhile, tipping during cutting is avoided to the greatest extent, and the service life of a product is prolonged; due to the design of the centripetal angle and the circumferential angle, the friction of the tooth side face to the workpiece is reduced, the cutting resistance is remarkably reduced, the temperature of the workpiece is reduced, and it is guaranteed that the cutting face of the workpiece such as wood, aluminum and plastic is smooth and free of focal marks.

The utility model discloses a dilator for the orthopedics department. Comprise a left clamp body and a right clamp body, a protruding rectangular groove is formed in the middle of the right clamp body, the left clamp body is a groove rectangular block, and the protruding rectangular block is embedded into the groove and connected with the groove through a rotating shaft; a right spring piece is fixed on the inner side of the tail end of the right clamp, a rectangular opening is formed in the front end of the right spring piece, a left spring piece is fixed on the inner side of the tail end of the left clamp, and a rectangular strip is arranged at the front end of the left spring piece and inserted into the rectangular opening in the front end of the right spring piece; two lugs are arranged on the inner side of the tail end of the left clamp, and a rack is fixed between the two lugs through a pin shaft. The front ends of the left clamp and the right clamp are both in a conical strip shape, a rectangular groove is formed in the inner side face of the front end of the left clamp, when the spreader is closed, the front end of the right clamp enters the rectangular groove of the left clamp, and after the spreader is closed, the overall width of the front end is the width of the front end of the left clamp. The rear end of the left spring piece is inserted in the lower side of a rack fixed at the tail end of the left clamp, so that the rack is perpendicular to the center line of the spreader. The tail end of the right clamp is in a sharp tooth shape, and tooth tips are kept to be inserted into tooth grooves in the rack.

The invention provides an automatic crushing device for rare earth oxide production, and relates to the technical field of rare earth oxide production, the automatic crushing device comprises a crushing cylinder, the lower side of the crushing cylinder is provided with a filter plate, the inner side of the crushing cylinder is rotatably connected with a square pipe through a driving mechanism, and a plurality of crushing rods with sharp teeth are rotatably inserted in the two sides of the square pipe; the device further comprises a linkage mechanism for driving the multiple crushing rods to rotate. The square pipe is driven by the driving mechanism to rotate, the square pipe drives the two crushing mechanisms to rotate, meanwhile, through the clutch mechanism, when large materials exist at any position on the hollow shovel plate, the cam and the main shaft can be combined through the clutch mechanism, meanwhile, the main shaft is driven to rotate through the meshing effect of a small gear and a large gear in the crushing mechanisms, and the crushing efficiency is improved. The main shaft drives the cam to rotate, the cam drives the rotating arm to swing forwards and backwards, the rotating arm can knock the firing pin, the firing pin transmits impact force to large materials, and the large materials can be quickly crushed.

The liftable double-layer garbage can comprises an outer barrel, an inner barrel, an outer rod, an inner rod, an elastic mechanism and a plurality of limiting blocks. The outer cylinder is provided with an accommodating groove; the inner cylinder is arranged in the containing groove in a lifting mode. The outer rod is provided with a lifting groove; the top side of the inner wall of the lifting groove is provided with a plurality of fixing blocks and a plurality of sharp teeth which are evenly distributed in the circumferential direction at intervals up and down. Each fixing block comprises a guide inclined edge and a limiting edge, and the guide inclined edge and the limiting edge jointly define a fixing groove; the inner rod is rotationally arranged on the inner cylinder, and one end of the inner rod extends into the lifting groove; the elastic mechanism drives the inner rod to ascend; the multiple limiting blocks are evenly distributed on the top side of the inner rod in the circumferential direction, and each limiting block comprises an upper vertex angle part, a lower vertex angle part, an upper inclined edge and a lower inclined edge. According to the invention, two states of high and low are realized, so that not only can the sitting posture state of a human body be adapted, but also the standing state of the human body can be adapted, the application range of the product is expanded, and the comfort of a user in use in various scenes is ensured.

The invention relates to the technical field of casing running, in particular to a full-bore floating casing running device which comprises an upper shell, a lower shell and a crushing assembly, and the crushing assembly comprises a crushing disc arranged on the lower portion of an annular boss in the upper shell and used for separating drilling fluid from slurry and a bearing ring arranged on the lower portion of the crushing disc and used for bearing the crushing disc. The annular convex block is arranged between the bearing ring and the inner wall of the upper shell and is used for supporting sharp teeth for crushing the crushing disc, and the shear pin is arranged on the annular convex block and is used for temporarily supporting the bearing ring; the pressure sensing assembly comprises a first pressure sensor, and the first pressure sensor is arranged on the inner wall of the upper shell and used for collecting a first pressure value of drilling fluid on a space formed by the crushing disc and the upper shell. And the situation that the drilling operation efficiency is seriously affected due to inaccurate crushing time of the crushing disc caused by high pressure in the well bottom is prevented.

The utility model relates to the technical field of welding, and discloses an ultrasonic welding head and ultrasonic welding equipment. The ultrasonic welding head comprises a welding head connecting part, a welding head force storage part and a welding head emitting part, the welding head connecting part is used for being connected with an ultrasonic welding equipment body, the welding head emitting part is connected with the welding head connecting part through the welding head force storage part, and the welding head emitting part is provided with a plurality of welding tooth structures in a truncated square cone shape. A first included angle is formed between the arrangement direction of the welding tooth structures and the edge of the welding head emitting part, and the value range of the first included angle is 10-80 degrees. Due to the design of the helical teeth, the teeth in the moving direction of the welding head are sharp teeth, so that the teeth of the welding head can be more effectively inserted into a deeper position, energy is concentrated to a welding area, and the welding efficiency is improved. Due to the design of the helical teeth, flowing of materials in the horizontal direction can be better controlled, and overflow in the welding process is reduced.

The application discloses a gear extrusion cigarette end extinguishing device, characterized in that two opposing force receiving cigarette extinguishing sharp tooth rollers under spring action are arranged between two parallel positioning wall plates, wherein an arc-shaped shaft hole corresponding to the position of the positioning wall plate is matched with the bearing at the two ends of the shaft, a main drive gear and a sub drive gear and synchronous transmission gears for driving the rotation of the two cigarette extinguishing sharp tooth rollers are arranged, the main drive gear is matched with a speed reducer motor, and a system that can make the two cigarette extinguishing sharp tooth rollers rotate towards each other and move to both sides to extrude the burning part of the cigarette end when the cigarette end passes through to make the cigarette end extinguish is formed.

The pair of multifunctional pliers comprises a pliers body, the pliers body comprises a first main body and a second main body which are mutually staggered left and right and twisted in different directions, and the first main body and the second main body jointly form a clamping part, a connecting part and a handheld part which are sequentially arranged from one end to the other end; the multifunctional fishing clamp is rich in function, integrates multiple functions of a fish clamping clamp, a deflation needle and the like, provides great convenience for fishermen, improves fishing efficiency and pleasure, is unique in shape, convenient to identify and distinguish due to the multifunctional structure arrangement, avoids being mixed with other fishing tackles, meets individual pursuit of the fishermen, is convenient to operate, is internally provided with a torsion spring, can be automatically opened after being loosened, and is convenient to use. After being closed, the pliers body can be locked through a key, fish escaping is prevented, the structure is ingenious, sharp teeth at the front end can be conveniently inserted into a fish opening, 3D sharp teeth are mutually embedded without gaps, small sawteeth in the middle and large sawteeth at the rear end effectively prevent slipping and disengaging, safety and reliability are achieved, the sleeve shell can be hung on a waistband, carrying is convenient, and the pliers body can be conveniently inserted and pulled out through the sleeve shell and is not prone to slipping and disengaging.

The utility model discloses a high strength steel plate self-piercing rivet nut in the technical field of piercing rivet nut, including the nut body, be provided with the first annular platform on the nut body, be provided with the second annular platform on the first annular platform, the nut body, first annular platform and second annular platform integrated forming, the outside of first annular platform is provided with the gear ring, the junction of second annular platform and first annular platform is seted up with the groove, be seted up with the connecting hole on the second annular platform, the connecting hole penetrates the nut body, the inside of connecting hole is provided with internal thread. The utility model discloses a gear ring structure is seted up, the arc groove between the tooth on the gear ring tooth and tooth and the sharp tooth tip can better pierce the steel plate, embed the base material, avoid the anti -rotation failure caused by the high material hardness, can produce enough local stress in the riveting process, make the steel plate extrusion deformation, thereby form firm mechanical interlock.

A method for tissue repair using a mattress stitch is disclosed. The mattress stitch is created using a suture threader and suture construct using only one portal and without a shuttling step. The suture threader is provided with two sharp teeth or tines that pierce the tissue (or tissue and associated graft) at two different locations. The suture construct can be a loop that terminates in a tail. The tail passes from one tooth to another and is then secured within the securing mechanism of one of the two sharp teeth. The tail passes through the loop to form a cinch loop around and through the tissue (or tissue and graft).

The utility model provides a novel slurry throwing blade group suitable for paddy field operation, which comprises paddy wheels, slurry throwing cutters, a cutting disc and a cutter shaft, the paddy wheels, the slurry throwing cutters and the cutting disc are all mounted on the cutter shaft, the number of the paddy wheels is two, and the paddy wheels are respectively positioned at the left end and the right end of the cutter shaft; at least five large sawtooth-shaped cutting edges are arranged in the circumferential direction of the cutting disc, each large sawtooth-shaped cutting edge is provided with inclined sharp teeth, one tooth surface of each large sawtooth-shaped cutting edge is a short plane, the other tooth surface of each large sawtooth-shaped cutting edge is a long arc-shaped surface, and each long arc-shaped surface is provided with a plurality of small tooth-shaped cutting edges which are arranged in a straight line. The straw cutting and slurry crushing effects of the slurry throwing blade group are improved, and a loose and uniform soil environment is created for the growth of rice roots.