168results about How to "Disperse impact" patented technology

The invention relates to a binding mechanism of a surgical binding apparatus, which is placed at the head of the surgical binding apparatus and includes a nail pin, a nail pushing plate and a nail block. The nail pushing plate and the nail pin are installed inside the binding apparatus body. The positions of the nail block and the nail pushing plate are opposite. The invention is characterized in that the working faces of nail pin, the nail pushing plate and the nail block are not at the same plane and at least present a step-type fall distributed structure. When the structure is adopted to form an anastomoses opening, the distance between two lines of nails is enlarged; the elasticity of the anastomoses opening which is formed in the operation is increased and is more close to the physiological characteristic of the tissue, which is in favor of the prompt recovery of the tissue. When the nail block is set out from an anastomoses ring or a content object is put through the anastomoses ring after binding, the elasticity of the anastomoses ring becomes larger to allow the nail block or the content object pass through and reduce the probability of damaging the anastomoses ring.

The invention discloses a buffering anti-collision guardrail on an expressway. The guardrail comprises a guardrail plate, a connection vertical column, a connection buffering tray, a reinforcing vertical column, a reinforcing buffering tray and a built-in steel plate, wherein the guardrail plate consists of an outer layer pipe plate, an inner layer pipe plate body, a steel plate clamping groove pipe body and a supporting buffer column; three layers of buffering structures are formed in the guardrail, the first layer is a three-layer pressure-reducing and buffering honeycomb, the second layer is a wave-shaped built-in steel plate manufactured in the pressure-reducing and buffering honeycomb, and the third layer is a connection buffering tray or a reinforcing buffering tray arranged between the guardrail and the vertical columns. The strength, toughness and bounciness of the guardrail are enhanced; the guard rail is connected with the vertical column elastically, so that the buffering anti-collision guardrail has high buffering capacity, bounciness, elasticity and impact resistance, phenomena that automobile accidents occur, and loss is caused by the automobile accidents can be effectively avoided; and the guardrail has the advantages of long service life and low using cost.

A super-hydrophobic microstructure includes a base body on which plural protrusions with different heights are formed. Some of the protrusions with different heights construct at least one closed curve from the top view. The super-hydrophobic microstructure has the advantages of higher structural strength and lower cost, and is easy to be manufactured.

The invention relates to a water surface floating platform and belongs to the field of floating devices. The water surface floating platform comprises a rigid supporting part and a flexible connecting part. The rigid supporting part comprises at least one layer of peripheral floating table, a center floating table arranged in the center of the rigid supporting part and connecting floating tables symmetrically arranged with the center floating table as the center. The peripheral floating table and the center floating table are connected through the connecting floating tables. The flexible connecting part is arranged in the space defined by the rigid supporting part and comprises a floating block set and a pull rope net which are parallel to each other. The pull rope net comprises pull ropes connected between the peripheral floating table, the center floating table and the connecting floating tables in a criss-cross manner. The pull ropes are provided with tension adjusting devices. By the adoption of the water surface floating platform, rigidity and flexibility are combined, and the structural stability and the environment adaptability of the water surface floating platform are effectively considered; and the modularization detachable design is adopted, the limits in the aspects of production, transport, assembly and the like are broken, and the platform can be conveniently enlarged and transferred.

The invention provides a method for recycling, classifying and utilization of construction solid waste. The method includes the following steps that 1, a construction solid waste collection device collects construction solid waste, and then the construction solid waste is classified, screened, recycled and crushed; 2, a metal and non-metal screening device screens metal garbage and non-metal garbage, screening of wood garbage and solid concrete is manually performed, a wood crusher is used for crushing wood garbage to serve as other building auxiliary materials, and the selected solid concreteis then crushed by a crusher to obtain paving subgrade materials; 3, the paving subgrade materials are classified and screened through screening devices used for different sizes of solid concrete, and A-particle-size solid concrete and B-particle-size solid concrete are screened out for standby application; 4, the paving subgrade materials are prepared; 5, paving, repeated compaction and acceptance are performed in sequence. The components of the obtained paving subgrade materials are simple, the construction solid waste is used for recycling, crushing and reuse, the processing efficiency ishigh, the processing cost is low, the comprehensive utilization rate is high and the method is worth popularizing.

The invention discloses a road protective fence for municipal engineering. The road protective fence comprises a lower crossbeam. One end of the lower crossbeam is connected with first vertical columns. The other end of the lower crossbeam is fixed to second vertical columns. The inner sides of the top ends of the second vertical columns and the first vertical columns are connected through an upper crossbeam. Connecting pieces are arranged at the two ends of the upper crossbeam. Sliding sleeves are arranged at one ends of the connecting pieces and arranged at the peripheries of bosses in a sleeving mode. The bosses are integrally formed at the tops of the first vertical columns and the second vertical columns. The top ends of the bosses are wrapped with rubber sleeves. The peripheries of the middles of the first vertical columns and the second vertical columns are movably connected with first rotating barrels. An anti-collision net is fixed between the upper crossbeam and the lower crossbeam. According to the road protective fence, the first rotating barrels and second rotating barrels are arranged, thus when a vehicle accidentally hits against the protective fence, a vehicle bodymoves after making contact with the first rotating barrels and the second rotating barrels, part of impact force is dispersed, rigid collision with hard objects is avoided, the damage extent is small,and safety is high.

The invention discloses a multi-level buffer structure for a fitness running machine plate. The multi-level buffer structure comprises a body of a running machine, a running belt and a running plate are arranged on the body, a base is arranged at the bottom end of the body, rotating shafts and sliding rods are arranged at two ends of the base, the sliding rods are positioned on the outer sides of the rotating shafts, rotating rods arranged at two ends of each rotating shaft, rotating rod buffer devices are arranged on the rotating rods, rollers are arranged at the lower ends of the rotating rods, two sleeves are arranged on each sliding rod, a horizontal buffer spring is connected between two sleeves, two connecting seats are arranged on the body, the connecting rods are hinged to the lower ends of the two connecting seats and hinged to the sleeves, telescopic rods are arranged at two ends of the base, two telescopic holes are formed in the lower portion of each end of the body, and vertical buffer springs are arranged on the outer sides of the telescopic rods. According to the structure, multi-level buffer is achieved, multi-directional buffer damping is achieved, vibration sense is buffered layer by layer, the reverse impact force of the running machine on human bodies is decreased, and the pressure of knee joints and lumbar vertebras is relieved.

The invention relates to the technical field of track safety protection and discloses a buffering device for a track protective fence. The buffering device for the track protective fence comprises a base; a mounting column is fixedly mounted at the top of the base; a strut is arranged at the top of the mounting column; a reinforcing sheet is fixedly mounted at the top of the mounting column; a shell is arranged on the left side of the strut; a steel wire column is arranged in the shell; and a fixed shell is arranged on the right side of the steel wire column. According to the buffering devicefor the track protective fence, by arranging clamping plates and rollers, the rollers are stressed to rotate in an accelerated manner so as to disperse the impact force of an automobile when the trackprotective fence is collided by the automobile; when the impact force is too large, connecting blocks extrude towards the left, pulleys are stressed to extrude rubber blocks, and the rubber blocks extrude second springs towards the upper and lower sides so that the impact force is further weakened; and when a U-shaped block is stressed, the collision force of the automobile can be more efficiently reduced by using first springs; and therefore, traffic accidents are furthest avoided, and safeties of the automobile and the personnel are greatly enhanced.

The invention discloses a solid wood floor which is characterized by comprising a single-layer solid wood board and a PVC (Polyvinyl Chloride) board, wherein the PVC board is fixedly connected with the solid wood board; the back of the solid wood board is formed into unit area blocks through uniformly spaced grooves; the solid wood board has the water content of 5-8% and the thickness of 8-20mm after being dried in vacuum at the temperature of 40-60 DEG C; the thickness of the PVC board is 2-5mm; and the depth of each groove is 1 / 5-1 / 2 that of the solid wood board. The solid wood floor is simple in structure, stable in size, non-deformable, warp-proof, dampproof, waterproof, environment friendly, capable of absorbing sound, preventing noise, conducting heat and preserving heat, suitable for floor heating, small in coefficient of thermal expansion, stable, simple and rapid in installation and construction and capable of being used after 24h if being adhered by using special environment friendly floor glue.

The present invention provides a hand tool with reliable connections comprising: a working unit having a working end and a handle end opposite to the working end; a handle being mounted on the handle end of the working unit and having a working unit end and a knocking unit end; a knocking unit being mounted on the knocking unit end of the handle. The connecting part between the knocking unit and the handle end of the working unit is a contacting surface, the handle end or the contacting surface is configured as a deformable and non-rigid contact, realizing the reliable connection between the working unit and the knocking unit. The deformable and non-rigid contact is realized by the configuration of at least one of the contacting surface and the handle end being configured to be tooth-shaped, the tooth-shape can deform and form a gapless engagement with the contacting surface. This configuration lowers the precision requirements for the production of each part; saves the costs; achieves reliable connections among the working unit, knocking unit and the handle of the hand tool; and disperses the impact force that damages the handle.

The invention discloses a steam valve with rotary bubble breakers, and aims to solve the problems that an existing steam valve rotary bubble breaker is low in bubble breaking rate, poor in bubble breaking effect, and imbalance in motions; the steam valve comprises a valve seat and a valve cover; the valve seat is provided with a steam inlet; the valve cover and the valve seat can form a steam chamber connected with the steam inlet; the steam valve comprises a first rotary bubble breaker and a second rotary bubble breaker respectively arranged in the steam chamber in a rotary manner, and the rotary bubble breakers can be driven by the steam ejected from the steam inlet to rotate, thus breaking bubbles; the advantages are that the two rotary bubble breakers can be simultaneously driven to rotate, thus providing high bubble breaking rate, dispersing the steam impact force, and ensuring the rotary bubble breakers to stably and normally work; when one rotary bubble breaker fails, the bubble breaking work can be ensured to be normally done, thus preventing the steam valve bubble breaking system failure, and allowing the steam valve to have more stable bubble breaking effect.

The invention discloses an automobile vibration damping bumper, comprising a bumper, vibration damping mechanisms, buffer mechanisms and supporting mechanisms, wherein the two sides of a bumper main body of the bumper are respectively and sequentially provided with a vibration damping rubber plate and an auxiliary bumper; each vibration damping mechanism comprises a first vibration damper, a second vibration damper, a guide rail bracket and a buffer block; the two ends of the first vibration dampers are respectively fixed on the auxiliary bumpers and the buffer blocks by means of mounting balls; each buffer mechanism comprises a first buffer spring, a connection pad, a second buffer spring and an adjusting screw nut which are sequentially connected with and sleeve a vibration damper main body; a collision block is fixed at one end of each vibration damper main body; one end of a hydraulic cylinder of each supporting mechanism is arranged in a guide pipe in a hanging way by means of a fixed block, and the other end of the hydraulic cylinder is connected with a support leg by means of a pin shaft. The automobile vibration damping bumper is provided with the bumper, the vibration damping mechanisms and the buffer mechanisms, so that multi-stage vibration damping is realized when a vehicle collides from the forward direction or an oblique direction; meanwhile, the supporting mechanisms are released, so that the road holding performance is enhanced, and the collision absorption performance of the bumper is further improved.

The present invention provides a display panel, a display device and a preparation method thereof. The display panel comprises: a substrate; a luminescent layer arranged on the substrate; a buffer structure comprising an airflow channel formed by a buffer layer, wherein the airflow channel is filled with air, the buffer structure is arranged at one side of the substrate, far away from the luminescent layer, the air in the airflow channel is compressed when display panel is impacted to allow the impact force to dispersed to the circumference of the air so as to disperse to the impact of the display panel and prevent the display panel from being damaged by the impact force.

The invention provides a floor beam structure applied to a vehicle. The structure comprises a middle channel, underfloor longitudinal beams, floor cross beams and inclined connecting beams, wherein the underfloor longitudinal beams are located on the left side and the right side of the middle channel; the floor cross beams are disposed on the left side and the right side of the middle channel, thefloor cross beam on each side is connected to the underfloor longitudinal beam on the same side and the middle channel; and the inclined connecting beams are connected to the left side and the rightside of the middle channel, and the front end of the inclined connecting beam on each side is connected to the underfloor longitudinal beam on the same side, and the rear end is connected to the floorcross beam on the same side and the middle channel. The floor beam structure applied to the vehicle provided by the invention has more force transmission channels, so serious deformation of a floor generated when the vehicle suffers impact can be avoided.

The invention provides a lamp testing device, a lamp testing framework and a lamp testing method. The testing framework comprises a frame body and a mounting support, wherein the frame body is a cuboid and has an accommodation chamber for holding lamps to be tested, and reinforced ribs are disposed between diagonal vertexes of at least one side surface of the frame body; the mounting support is arranged between two parallel edges of one side surface of the frame body, and is used for fixing and connecting the lamps to be tested. The arrangement of the mounting support enables impact energy to be transferred to the support of the lamp and to the lamp, so as to test impact resistance capability for the support of the lamp and for the lamp. Special structural designs of the lamp impact-testing frame, such as reinforced ribs, reinforced plates, wrap angle reinforced elements, and the like, can reduce material consumptions under the condition of assuring impact strength, thereby reducing production cost.

The invention provides a novel sand and rock filter, relates to a filter for surface water filtering and sewage treatment, and aims to provide a novel sand and rock filter which is simple in structure, low in use and maintenance cost, and complete in filtering and cleaning. The novel sand and rock filter comprises a tank body; a water inlet and a sand filling opening are formed in the upper part of the tank body; a water outlet and a sand digging opening are formed in the lower part of the tank body; a plurality of brackets are mounted below the tank body; a single buffering baffle is arranged under the water inlet; the edge part of the buffering baffle is arranged upwards in an inclined manner; a filter element base is mounted above the water outlet; a back washing valve and a plurality of filter elements are arranged on the filter element base; each filter element comprises a framework and a wrapping wire wound on the framework; the cross section of the wrapping wire is trapezoidal; the bottom surface, corresponding to the longer bottom edge, of the trapezoidal cross section is in contact with the framework; a V-shaped clearance is defined by two adjacent circles of the wrapping wire on the framework; a sand and rock mixing layer is arranged in the tank body; the top surface of the sand and rock mixing layer is higher than the upper surfaces of the filter elements.

The invention discloses a decorative sheet foamed by straw and a manufacturing technology of the decorative sheet. The decorative sheet comprises two layers of surface sheets arranged at the upper andlower sides and a foaming sandwich layer, straw sections of which the length is 2-6 mm are uniformly mixed in the foaming sandwich layer, a reinforcing framework is further arranged between the surface sheets, and the foaming sandwich layer fills a gap part of the reinforcing framework; the reinforcing framework comprises two layers of grid sheets laid on the inner sides of the two surface sheetsrespectively and a supporting sheet connected with the grid sheets, several mounting grooves of which the cross sections are trapezoidal are formed in the inner sides of the grid sheets, the supporting sheet is a corrugated sheet of which a groove channel is triangular, the top of the convex ridge of the corrugated sheet is ground into a trapezoidal structure matched with the mounting grooves, and the sides of the grid sheets are fixedly connected with a side sealing sheet of the side face of the decorative sheet. According to the decorative sheet, the strength of the decorative sheet can beeffectively improved, particularly, the strength of impact to the surface sheets is greatly improved, and only less weight is added to the decorative sheet at the same time.

The invention discloses a large-size glass packaging method and aims to solve the problem that a traditional method has a poor protection effect on glass packaging. The key point is that the large-size glass packaging method comprises the following steps: firstly, laying shock absorbing plates inside a first paper box, and packaging the glass between the shock absorbing plates; afterwards, coatingthe four corners and long edges of the two sides of the first paper box with corner coating parts and edge coating parts; finally putting into a second paper box to end the packaging. According to the large-size glass packaging method disclosed by the invention, by virtue of the shock absorbing plates, the corner coating parts and the edge coating parts, the glass is approximately in an suspension state when being subjected to shake, so an impact force applied to the glass is effectively reduced and dispersed, the glass has a higher capability of resisting an external force in a transportation process and is hard to damage, and thus the transportation quality of the glass is improved, meanwhile the used materials are reduced and the cost is lowered.

A protective film for attaching to a glass surface comprises an adhesion layer for adhering to the glass surface, an anti-shock layer located on the adhesion layer, and a support layer connected onto the anti-shock layer. A construction material of the support layer is selected from one of poly(ethylene terephthalate) and polyvinyl chloride; particularly, the composition of the anti-shock layer comprises a styrene-butadiene block copolymer, so that glass attached with the protective film has good shock resistance and is not easily broken and cracked by foreign objects; and moreover, the light transmittance of the protective film to visible light is not less than 85%, so the protective film is applicable to surface protection of touch screen glass panels and car windshields, and besides also can increase the service life and the security of glass materials.

The invention discloses a fireproof decorative board combined with straw and a preparation process and installation method thereof. The decorative board includes two layers of surface plates arrangedon the upper and lower sides and a foam interlayer; the foam interlayer is formed by naturally foaming a material A and a material B in a fireproof decorative board body, wherein the material A is combined polyether, and the material B includes isocyanate and diphenyl phosphate; a straw segment in the length of 2-6 mm is mixed with the foam interlayer uniformly, a reinforcing framework is also arranged between the two surface plates and includes two layers of grid plates laid on the inner sides of the surface plates respectively and a corrugated plate connected with the grid plates, and multiple mounting grooves with trapezoidal cross sections are formed in the inner sides of the grid plates; the tops of flanges of the corrugated plate are polished flat into trapezoidal structures matchedwith the mounting grooves. The strength of the decorative board can be effectively enhanced, especially the impact resistance to impact performed on the surface plates is substantially improved, and meanwhile the weight of the decorative board can be only increased slightly.

The invention discloses a four-point child safety belt with an annular waistband, which is to solve the problems that the traditional child safety belt is discomfortable for wearing and the child is easy to descend in the collision process, etc. According to the invention, the four-point child safety belt with the annular waistband comprises a shoulder harness mechanism, a waistband mechanism, shoulder harness and waistband connecting pieces, a shoulder harness guide mechanism, a waistband connection fixing piece, shoulder harness retractor connecting pieces and a retractor. The shoulder harness mechanism comprises a left shoulder harness and a right shoulder harness; the left and right shoulder harnesses respectively penetrate through left and right shoulder harness sliding rings of the shoulder harness guide mechanism mounted at the upper part of a seat backrest; and front parts of the left and right shoulder harnesses are connected with the waistband mechanism by using shoulder harness and waistband connecting pieces while back parts of the left and right shoulder harnesses are connected with the retractor by using the shoulder harness retractor connecting pieces. According to the invention, the impact force subjected to the child can be preferably dispersed in the collision process, the four-point child safety belt disclosed by the invention can adapt to the height variation of an integrated automobile child seat, the descending of the child in the collision is effectively avoided and much safer protection is provided to the child passenger in the collision accident.

The invention relates to an anti-collision carrying frame. The carrying frame comprises a carrying frame body, a buffer component and a rolling assembly, wherein the buffer component is magnetically connected with the carrying frame body; the mounting position of the buffer component can be selected according to actual requirements; the buffer component comprises a plurality of bags filled with fluid; the bags are arranged on the inner side of the frame in a spaced mode; the bags filled with the fluid can deform and have a certain resilience characteristic; impact force generated by collisionof furniture can be effectively buffered; and the furniture is prevented from being damaged by collision in the carrying process.

The invention discloses a road construction safety protection device. The road construction safety protection device comprises a counterweight bottom plate, wherein a shielding vertical plate is arranged at the middle position of the top of the counterweight bottom plate; the positions between the side faces of the shielding vertical plates at the two sides are in rotary connection through hinges; guide grooves are vertically and uniformly formed in the front face of the shielding vertical plate; the outer parts of the top ends of the guide grooves are fixedly connected with collision protection mechanisms; buffering contact sheets are arranged at two sides, located on the back face of the shielding vertical plate, of the counterweight bottom plate; the counterweight bottom plate is internally provided with a stable adjusting mechanism; and the stable adjusting mechanism is in rotary connection with the bottom end of the shielding vertical plate. The invention relates to the technical field of roads. By adopting the road construction safety protection device disclosed by the invention, the bottom end part of a positioning inserting rod is inserted into the ground, so that the resistance between the device and the ground is increased and the stability of the whole device is improved.

The invention provides a manhole cover with adjustable height. The manhole cover comprises a base and a manhole cover body, wherein a manhole cover height adjusting device and an adjusting ring are arranged between the base and the manhole cover body, the center of the base is provided with a through hole connected with a pit pipeline, a plurality of adjusting bolt holes are formed along the innerwall of the through hole, one end of the height adjusting device is assembled with the adjusting bolt holes, the other end of the height adjusting device is used for containing the adjusting ring, the adjusting ring can be driven to rise and fall in the through hole of the base through the adjustment of the height adjusting device, and the manhole cover is buckled on the adjusting ring. The manhole cover with the adjustable height has the advantages that according to the height difference between the road surface and the adjusting ring, the height adjusting device is adjusted, and the levelness of the adjusting ring is also adjusted when the height is adjusted, thereby achieving the effect that the road surface and the manhole cover are flush.

The invention discloses a stone deflector for a locomotive. The stone deflector comprises a stone deflecting tube base, a fixing base and an adjusting device, and is installed at the front end of a locomotive bogie to be used for removing obstacles on a locomotive rail. The fixing base is fixedly installed at the front end of the locomotive bogie; the stone deflecting tube seat is installed on thefixing base through a bolt; the adjusting device is connected between the stone deflecting tube base and the fixing base and can adjust the height between the stone deflecting tube base and the rail;and a proper height is selected to improve the stone deflecting efficiency. The overhauling efficiency of the stone deflector can be improved, and operation is convenient. A round tube is used for removing stones, impacting force generated when the stone deflector hits against the stones in the high-speed running process of the locomotive is dispersed, and the service life is prolonged; reinforcing plates are additionally arranged on large parts such as a mounting plate and a fixing plate, so that the stability of the stone deflector is improved; and triple anti-disengaging devices are arranged, so that it is guaranteed that the stone deflecting tube base can not fall during high-speed running of the locomotive, and the traveling safety is guaranteed.

The invention discloses an earthquake lifesaving bed, and belongs to the field of lifesaving devices. The earthquake lifesaving bed comprises a cover body which is provided with a storage chamber, wherein the upper end of the storage chamber is open; a bed board which is positioned in the storage chamber; a lifting device which is located in the storage chamber and is used for driving the bed board to move up and down; a first baffle of which one side is hinged to one side of the cover body; a second baffle of which one side is hinged to the other side of the cover body; and clamping surfaceswhich are arranged on the side boards, corresponding to the first baffle and the second baffle, of the cover body. The first baffle is connected with the bed board through a first pull rope, and the second baffle is connected with the bed board through a second pull rope. When the bed board moves downwards, the first pull rope and the second pull rope drive the first baffle and the second baffle to turn over respectively, and when the lifting device moves downwards, the first baffle and the second baffle are pulled through the first pull rope and the second pull rope to turn over respectively,so that the structure is simple, the stability is high, and the impact force generated by the falling of a heavy object can be effectively dispersed.

The invention provides a basalt composite bulletproof plate which comprises a crack stopping layer, a bullet receiving layer, a transition layer and a back plate layer. The crack stopping layer is connected with a bullet receiving surface of the bullet receiving layer, so that a plate body of the bullet receiving layer is prevented from being cracked, and the bulletproof plate is prevented from being damaged for the second time; the bullet receiving layer bears and eliminates a bullet shooting impact force, so that a bullet body is damaged; the transition layer is clamped between the bullet receiving layer and the back plate layer, and is used for supporting the bullet receiving layer and reducing the stress between the bullet receiving layer and the back plate layer; and the back plate layer is connected with one surface, far away from the bullet receiving layer, of the transition plate, so that the cracked bullet body is stopped and is prevented from further penetrating. The bulletproof plate is high in hardness and thin, has no bulge, cannot hurt internal organs, and can effectively prevent bullet striking and disperse a bullet impact force.

The invention discloses a circular tooth knife for a plastic pulverizer and a grinding tool and a processing technology thereof, and belongs to the technical field of mechanical cutters. The circular tooth knife comprises a cylindrical knife body, n knife teeth are uniformly distributed in the length direction of the periphery of the knife body, n is larger than or equal to 30 and smaller than or equal to 50, a tooth groove is formed between every two adjacent knife teeth, and arc faces are arranged at the edges in the length directions of the groove bottoms of the tooth grooves. The grinding tool comprises a mounting unit, a positioning unit and a grinding unit, the mounting unit is used for supporting the knife body to be processed, the positioning unit is used for limiting rotation of the knife body on the mounting unit, and the grinding unit is used for polishing cutting edge faces of the knife teeth; and the mounting unit is located between the positioning unit and the grinding unit. The processing technology of a round blade is that after linear cutting is carried out, the grinding tool is used for grinding and machining the cutting edge faces. By means of the circular tooth knife, the sharpness of the circular tooth knife can be ensured, the service life can be prolonged, and the cutting edge faces of the knife can be conveniently and accurately ground.