364 results about "Blade plate" patented technology

The utility model belongs to the field of turning and milling composite machine tools, and particularly relates to a heavy-duty turning and milling cutter frame which comprises a cutter frame body, a turning cutter plate reciprocating along an X axis is arranged on one side of the cutter frame body, a power head reciprocating along the X axis and a Y axis is arranged on the other side of the cutter frame body, a first sliding assembly is arranged on the cutter frame body, and a second sliding assembly is arranged on the cutter frame body. A first sliding assembly is arranged in the tool rest body to achieve reciprocating motion of the power head, a first X-axis power driving assembly and a Y-axis power driving assembly which drive the first sliding assembly are arranged in the tool rest body, and a second sliding assembly is arranged on the tool rest body to achieve reciprocating motion of the turning tool board. According to the milling cutter rest for the heavy-duty car, a milling part is placed on one side, so that the range of a machining area is larger; a power driving assembly of the milling part is in a built-in type, the space layout is reasonable, and the size is reduced.

The utility model provides novel automatic film pasting back feeder equipment which comprises a rack, a controller, a discharging wheel, a receiving wheel, a stripping knife plate and a label receiving platform, and further comprises a transmission wheel assembly and a fixed pressing plate, the transmission wheel assembly is located below the stripping knife plate, and the fixed pressing plate is located below the stripping knife plate. The transmission wheel assembly comprises a first guide wheel, a second guide wheel, a driving wheel, a driving motor, a driving wheel and a supporting wheel; and a bottom belt of the film pasting material belt between the discharging wheel and the receiving wheel is sequentially erected on the first guide wheel, the second guide wheel and the supporting wheel. The utility model aims to provide the novel automatic film-sticking back-removing feeder equipment, so that the stable conveying of a film-sticking material belt and the smooth stripping of a sticking film are realized, the structure is compact, and the occupied area is reduced.

The utility model relates to a workpiece support of a centerless grinding machine, and relates to the technical field of grinding machines. The workpiece support of the centerless grinding machine comprises a cutting board support and a feeding board support, feeding boards are fixed to the feeding board support, a feeding channel used for conveying workpieces is formed between the two feeding boards, the cutting board support comprises a fixing block and a lower cutting board, the fixing block is fixed to a base of the centerless grinding machine, and the lower cutting board is fixed to the side, away from a guide wheel of the centerless grinding machine, of the fixing block. The feeding plate support comprises a fixed base fixed to a centerless grinding machine base and two coarse adjusting blocks, the two feeding plates are fixed to the upper ends of the two coarse adjusting blocks respectively, a protruding block in the width direction of the feeding channel is fixed to the upper end of the fixed base, and sliding grooves allowing the protruding block to slide are formed in the lower ends of the two coarse adjusting blocks. First fasteners are arranged on the coarse adjusting blocks, and after the two coarse adjusting blocks slide to adjust the distance between the two coarse adjusting blocks, the coarse adjusting blocks and the fixed base are fixed through the first fasteners. The feeding device has the effect of conveniently adjusting the width of the feeding channel.

The utility model relates to the technical field of straw processing, and discloses an equidistant cutting device for straw processing, which solves the problems of difficulty in equidistant cutting, low precision and inconvenience in positioning of straws with different diameters in the straw processing process, and mainly comprises a frame body, a hydraulic cylinder, a cutting board base, an equidistant cutting component and the like, the frame body is fixedly connected with the side baffles through the inverted-L-shaped structural plates, stable supporting is provided, and the object carrying plates can be clamped, embedded, installed and replaced through the dovetail grooves. A V-shaped groove, a cutter groove and a V-shaped clamp are arranged on the loading plate, so that the suction pipes with different pipe diameters can be conveniently positioned; the hydraulic cylinder drives the cutting board base, and the guide rod of the cutting board base slides along the guide groove; according to the equidistant cutting assembly, through cooperation of an air cylinder, a linkage push rod, tool arms, a connecting piece, a tool bit, an organ groove and other components, the distance between the tool arms can be flexibly adjusted, a sensor reads scale line numerical values to ensure the precision, the cut suction pipes fall into a collecting frame, efficient and accurate equidistant cutting of the suction pipes is achieved, and the production efficiency is improved.

The utility model discloses a pole piece lineation mechanism, which is characterized in that a pole piece is placed between a bottom plate and a pressing plate, so that the pole piece can be fixed, then a sliding frame slides along a guide rail, so that four blades are respectively positioned above four lineation grooves, and a cutter adjusting plate moves along the vertical direction under the action of a guide assembly; the knife adjusting plate is pressed down to drive the blade to penetrate through the scribing groove to scribe the pole piece, four notches are formed in the pole piece, four points A, B, C and D are marked on the four notches and are arranged in a square shape, the length ratio of AB, CD, BC and AD before and after rolling is calculated, and the elongation percentage of the pole piece in the transverse and longitudinal X / Y directions is obtained; the length ratio of AC to BD before and after rolling is calculated, and the lateral bending warping rate of the pole piece is obtained.

The invention relates to the technical field of transfer cylinders, in particular to a polyacrylamide processing transfer device which comprises a cylinder, a bracket is slidably connected into the cylinder, a servo motor is mounted on the surface of the bracket, a plurality of blades are fixed to a rotating shaft of the servo motor, a first cutting board is arranged at the end of each blade, and an electric telescopic rod is mounted on the surface of the bracket. One end of a piston rod of the electric telescopic rod is fixed on the inner wall of the cylinder; the polyacrylamide raw material mixing device has the beneficial effects that when the barrel is dumped and horizontally placed on the ground and is pushed to roll forwards to transfer a polyacrylamide raw material, a servo motor switch is triggered, a servo motor rotating shaft drives blades to mix the raw material in the barrel, mixing operation is completed while the raw material is transferred on site, the production efficiency is improved, and the production cost is reduced. Extra mixing equipment is not needed.

The application belongs to the technical field of flow velocity measurement, and particularly relates to an assembled adjustable flow velocity measuring instrument. When the existing flow velocity measuring device is installed on a counterweight, it can only be fixed through a simple bolt assembly, the fixing method is single, the device cannot be easily disassembled after being fixed, the device cannot be well maintained, and the utilization rate is reduced. The device comprises a mechanical box, a hook is installed at the bottom of the mechanical box, a steel rope is wound on the hook, and the steel rope is fixedly connected with the counterweight. A connecting block is arranged on the side of the mechanical box away from the counterweight, and a flow velocity instrument assembly is installed on the connecting block. The flow velocity instrument assembly comprises an adjusting column arranged on the top of the connecting block, a connecting ring is installed on the adjusting column, a measuring shaft is arranged on the outer side of the connecting ring, a speed measuring blade plate is installed on one end of the measuring shaft, and a speed measuring instrument is arranged on the other end of the measuring shaft. The speed measuring instrument is connected with a flow velocity measuring host through a speed measuring optical fiber, and the efficiency of the device during installation and disassembly is improved.

The invention discloses a conveying device for rice production and a method thereof, and belongs to the technical field of rice production. The device comprises a box body, a heating cylinder, a conveying cylinder, a motor, a speed reducing unit, a conveying mechanism, a rolling mechanism, a first transmission mechanism and a second transmission mechanism, the interior of the box body is divided into a material distribution chamber and a drying chamber through a partition plate, the drying chamber is provided with an axial flow fan, and the partition plate is provided with through holes with interception nets. The heating cylinder penetrates through the two chambers, is embedded with an electric heating layer, and is provided with a first air hole and a feed opening; the conveying cylinder is sleeved outside the heating cylinder, a second blade plate is arranged on the inner wall, and a second air hole and a discharge hole are formed; the motor and speed reduction unit drives the rolling mechanism through the first transmission mechanism, drives forward conveying in the heating cylinder through the conveying mechanism, and drives reverse conveying in the conveying cylinder through the second transmission mechanism. The device integrates the functions of rolling, impurity removal, dual drying and bidirectional conveying, solves the problems that an existing device is single in function and incomplete in impurity removal, and improves the rice production efficiency and the raw material quality.

The present application relates to a kind of knife groove lifting type flanging machine, including base, base includes two sides opposite wallboard, and the rear side between wallboard is inserted and fixed with cross beam, and cross beam is distributed in the upper end and lower end of wallboard;The upper portion of the front end surface of wallboard is fixed with rectangular tool holder plate, and the lower side of the front end surface of tool holder plate is formed with installation groove passing through the lower end surface of tool holder plate, and the installation groove is inserted and fixed with flanging tool plate, and the just below of flanging tool plate is equipped with flanging knife groove, and flanging knife groove is fixed on vertical tool groove lifting seat, and the rear end surface of tool groove lifting seat is fixed with several vertical distribution sliding blocks, and sliding block is inserted with vertical guide rail, and guide rail is respectively fixed on the front end surface of wallboard.This flanging machine will be designed with fixed structure to flanging tool plate, and then flanging knife groove is designed with lifting structure, and air duct can be lifted with flanging knife groove to cooperate flanging tool plate to be flanged, and air duct enters the avoidance groove of tool holder plate in the process of flanging, and the side edge of air duct is smoothly flanged.

The invention discloses a fishing roller and an automatic water surface cleaning device. The device comprises a rolling body, a blade plate and a collector plate, the interior of the rolling body is hollow to form a hollow cavity, a rotating shaft is fixed to the axis of the rolling body, and a plurality of slit openings are circumferentially and uniformly distributed in the outer circumferential surface of the rolling body and penetrate through the rolling body to be communicated with the hollow cavity; the blade plates are clamped on the slit openings, and gaps are reserved between the blade plates and the slit openings; the collector plate is provided with a collector groove, the collector plate is arranged in the hollow cavity and connected to the rotating shaft, the collector plate is located on the lower half side of the hollow cavity, rotation of the collector plate relative to the rolling body is kept prohibited, the collector plate extends in the axis direction of the rolling body, one of the two ends of the collector plate is high, and the other end of the collector plate is low; the side, close to the outflow opening, of the rolling body is provided with a plurality of collecting openings right opposite to the outflow opening, and floating algae and solid waste in pollutants floating on the water surface are classified and cleaned.

The utility model relates to the technical field of metal plate processing equipment, and discloses an adjustable steel plate cross cut shear tool apron which comprises a shell, an adjusting mechanism is installed on the top of the shell, a plurality of sets of inclining mechanisms are arranged on one side of the adjusting mechanism, a positioning mechanism is installed on one side of the shell, and the positioning mechanism is arranged on the other side of the shell. The inner wall of the adjusting mechanism is provided with a mounting mechanism, one side of the shell is provided with a sensor, the interior of the shell is fixedly connected with a limiting mechanism, the adjusting mechanism comprises a fixing plate, the bottom of the fixing plate is fixedly connected to the top of the shell, one side of the fixing plate is in threaded connection with a lead screw, and the lead screw is in threaded connection with the limiting mechanism. A first motor is fixedly connected to one side of the lead screw. According to the utility model, the supporting table is combined with the moving table, so that a steel plate is stably positioned; the moving table is driven by a motor, the position of the lower cutter plate is accurately adjusted, the motor drives a screw to rotate and guide the moving plate, and therefore the hydraulic cylinder and the inclining mechanism are pushed, and the cutting plate is effectively adjusted.

The invention discloses a land leveler dozer blade structural member lap welding tool which comprises a bearing assembly and a lap joint assembly, the bearing assembly comprises a bearing seat, the top of the bearing seat is connected with a plurality of bearing vertical plates arranged in a straight line in an assembled mode, and the tops of the multiple bearing vertical plates are connected with the same dozer blade plate in a buckled mode; the lap joint assembly comprises a lap joint frame with the V-shaped section, a plurality of clamping assemblies and two bracket assemblies. The dozer blade auxiliary component is positioned and installed on the lap joint assembly, when the dozer blade auxiliary component is accurately in butt joint with the dozer blade plates at the tops of the multiple bearing vertical plates through the lap joint assembly, the side plates are fixed through the two bracket assemblies, the dozer blade plates can be positioned when the side plates are arranged at the two ends of the dozer blade plates, and meanwhile, the dozer blade auxiliary component can be fixed through the bracket assemblies. Due to the fact that the position, used for positioning the auxiliary component, of the lap joint assembly is fixed and overall cooperation is achieved, the auxiliary component can be accurately in lap joint with the outer wall of the dozer blade plate, and the accuracy of the welding position is guaranteed.

This invention relates to a gantry shearing device for scrap steel recycling, belonging to the technical field of gantry shearing devices. It includes two support columns, with a fixed beam fixedly installed at the top of both columns. A conveying trough is fixedly installed at the rear of both support columns, and a pushing component is provided on the rear side of the inner wall of the conveying trough. Two sets of hydraulic cylinders are fixedly installed at the top of the fixed beam. The output end of the front set of hydraulic cylinders is equipped with a cutting blade, while the output end of the rear set of hydraulic cylinders is fixedly equipped with a pressing plate. The cutting blade includes a connecting horizontal plate and a cutting blade body disposed at the bottom of the connecting horizontal plate. This invention ensures that the material is reliably compressed before shearing by real-time detection of the material thickness during the conveying process, fundamentally avoiding material slippage, edge curling, and displacement during shearing, significantly reducing the risk of blade jamming, improving equipment operational stability, and achieving adaptive adjustment of the blade gap according to the material thickness.

The utility model relates to the technical field of angelica sinensis planting, in particular to a digging device for angelica sinensis planting, which comprises a connecting rod, the device further comprises a soil digging assembly, the soil digging assembly is arranged at the left end of the connecting rod, the soil digging assembly comprises a connecting block, a disc, a gear, a cutting board, a moving wheel, a toothed plate and a rotating rod, and the front side of the left end of the connecting rod is connected with the connecting block. The soil digging assembly is arranged, the moving wheel rotates on the ground, the moving wheel rotates to drive a toothed plate to rotate, the toothed plate drives a gear to rotate, the gear rotates to drive a disc to rotate, and the disc rotates to drive a plurality of cutting boards to rotate, so that soil is turned, the hardness of the soil is reduced, and the effect of soil pretreatment is achieved; the problems that an existing excavating device for angelica sinensis planting usually directly conducts excavating operation and has no treatment capacity for the hardening degree of soil, additional reclamation equipment is needed for pretreatment when land parcels which are not reclaimed or hardened soil are encountered, the additional cost is increased, and the operation efficiency is reduced are solved.

The utility model relates to the technical field of express logistics, in particular to an automatic parcel sorting device for express logistics, the lower side of the left end of a detection box is fixedly connected with a feeding frame, the lower side of the interior of the feeding frame is rotatably connected with a feeding conveying belt, and the inner side of the feeding conveying belt is provided with guiding and conveying blocking blade plates in a crossed mode; according to the automatic feeding device for the parcels, the parcels can be automatically fed under the action of the arranged feeding conveying belt, the transmission wheel can drive the transmission rod to rotate through rotation of the retarding motor, and therefore the parcels can be automatically fed through the transmission wheel, the parcels can be automatically fed through the transmission wheel, and the parcels can be automatically fed through the transmission wheel. And a transmission bolt can drive a driven wheel to rotate discontinuously, so that an outer side blade plate of a guiding and conveying blocking blade plate can push a single package and can block subsequent packages, and the situation that multiple packages are conveyed into detection equipment at the same time, and consequently the detection accuracy and the sorting accuracy are affected is avoided.

The application discloses a roller positioning device and relates to the technical field of knife plate processing. The roller positioning device comprises a conveying roller, sliding seats arranged on both sides of the conveying roller along the conveying direction of the conveying roller, a driving device for driving the sliding seats to move along the conveying direction of the conveying roller, and a pair of light electric switches fixedly installed on the sliding seats, wherein the second pair of light electric switches is located behind the first pair of light electric switches along the conveying direction of the conveying roller. The pair of light electric switches is arranged to make the parking position of the knife plate exactly located at the center of the truss grab, thereby ensuring the accuracy of the parking position of the knife plate in the material preparation area, greatly reducing the failure rate of the equipment, effectively reducing the participation of manual work, greatly improving the production efficiency, and improving the yield and benefits.

This invention discloses a special cutting tool and machining method for removing welded stops within the confined space of an aero-engine. The special cutting tool includes a tool holder and a cutting plate. The head of the tool holder has a spindle interface for connection to a machine tool spindle. The cutting plate is generally flat, with a cutting edge at its end for removing the welded stop. The tool holder and cutting plate are connected by a connecting mechanism, and the connected tool holder and cutting plate are L-shaped. The machining method adopts a "separate, internally connected" design concept, cleverly solving the problem of the tool being unable to enter the ultra-narrow inlet deep cavity.

The utility model provides a kind of for cattle and sheep slaughtering processing's split operation platform, belong to cattle and sheep meat processing technical field.The utility model includes support frame and the operation platform of support frame top installation, the middle part of the operation platform is fixedly provided with mounting bracket, cutting device is provided on the mounting bracket;Electric cylinder drives variable pitch plate to move, by the cooperation of upper limit piece, side limit piece and variable pitch groove, the equidistance adjustment of the spacing between knife plate is realized, this design can satisfy different cutting requirements, such as rib cutting when adjusting small spacing to realize dense cutting, meat slice when adjusting large spacing to adapt to different parts thickness, improve the flexibility and adaptability of operation platform, can satisfy the slaughtering processing demand of diversification, simultaneously, the two reverse thread design of screw No.2, through rotating hand wheel drive both sides clamping plate synchronous movement, different sizes of cattle and sheep carcass can be firmly clamped, improve the versatility of equipment, change the condition that traditional equipment is difficult to stably fixed different size carcass.

Brackets for posts and methods of using the same are described. The brackets may include a lower base plate with one or more fastener holes to connect a bracket to a support surface, an upper base plate to support a post and which may include one or more access holes aligned with the lower plate fastener holes and a knife plate that extends above the upper base plate and into a slot in the post. The brackets may also include one or more walls that extend from the lower base plate to the upper base plate to support the upper base plate. The knife plate may extend from the lower base plate through a slot in the upper base plate and may include one or more ledges that support the upper base plate.

The invention belongs to the technical field of express delivery connection, and particularly relates to an unmanned aerial vehicle express delivery connection device which comprises a windowsill body, a storage assembly is arranged on the windowsill body, and a driving assembly is arranged below the storage assembly; the storage assembly comprises a recycling frame and a storage box, the recycling frame can drive the storage box to rotate, and the recycling frame can further drive the storage box to move. Electromagnetic dampers are arranged at the connecting positions of the opening and closing blade plates and the storage box, the rotating angles of the opening and closing blade plates on the two sides are controlled by adjusting the magnitude of the input current, multiple express items sequentially fall to an express item tray according to the tracks over the express items, on one side and on the other side, layered and ordered stacking of the express items can be completed without manual intervention, the storage space is saved, and the express items can be stored more conveniently. And subsequent pick-up and arrangement of the user are facilitated, the express delivery connection and storage efficiency is greatly improved, the first electric telescopic rod in the recycling frame is contracted, recycling and storage when the device is idle can be achieved, and the space adaptability of the device is improved.

The utility model provides a potato seed tuber cutting machine, which relates to the technical field of potato planting, and comprises a platform plate, a cutting knife assembly is arranged on the upper surface of the platform plate, the cutting knife assembly comprises two groups of bearing rings, the side surfaces of the bearing rings are provided with sliding chutes, the inner walls of the bearing rings are provided with knife plates, and the knife plates are arranged on the upper surface of the platform plate. Sliding blocks are fixed to the two ends of the cutting board and connected with the sliding grooves in a sliding mode. According to the potato seed tuber cutting machine, by arranging the cutting knife assembly, when the distance between knife plates needs to be adjusted, a first adjusting disc is rotated to enable an auxiliary plate to relieve extrusion on a sliding block, the sliding block can move left and right in a sliding groove after loosening, the first adjusting disc is rotated after adjustment is completed, and the first adjusting disc pushes the auxiliary plate to extrude and limit the sliding block again; and by adjusting the distance between the cutting boards, the problem that in the prior art, a common potato dicing device is poor in applicability is solved.

The utility model discloses a rapid sampling bottle for fruit and vegetable pesticide residue detection, and belongs to the technical field of food detection equipment. The problems that in the prior art, when samples such as fruits and vegetables are peeled and sampled, cross contamination is prone to occurring, and the samples such as the fruits and vegetables are inconvenient to chip and sample on site are solved. A bottle cap is mounted on the top of the bottle body, a sample inlet is formed in the circumferential surface of the bottle cap, two side plates are mounted on the sample inlet, an upper plate and a lower plate are mounted on the upper sides and the lower sides of the two side plates respectively, an end plate is mounted on the right side between the two side plates, a peeling opening is formed in the end plate, and a cutter plate is mounted on the end plate and located on the right side of the peeling opening. Blades are arranged at the lower ends of the cutting boards.

The utility model discloses a manual plate shearing device convenient for fixing and pre-tensioning plates and strips. The manual plate shearing device comprises a plate shearing machine support, a cutting board frame, a movable cutting board, an objective table, a fixed cutting board, an objective table moving mechanism, a plate and strip fixing mechanism, a tensioning mechanism and a hopper. According to the utility model, the plate strip can be quickly clamped, locked and unlocked through the fixing mechanism, so that the displacement and bounce of the plate strip during shearing are avoided; according to the plate strip shearing mechanism, the two fixing assemblies can be matched with a tensioning mechanism, the relative positions of the two fixing assemblies can be adjusted so as to adapt to machining of plate strips of different sizes, and the mechanism can further apply proper tension to the plate strips by laterally pushing the fixing assemblies so as to guarantee the flatness and straightness of the surfaces of the plate strips during shearing; the sheared materials are collected in a lossless mode through the hopper, so that the shearing stability and the machining precision of the plate shearing machine are guaranteed, the structure is visual and simple, and operator training and equipment maintenance are easy.

The utility model belongs to the technical field of indoor ventilation, and particularly relates to an indoor energy-saving ventilation structure for municipal building design, which comprises a building wall body, a ventilation pipeline is fixedly mounted in the building wall body, and a first positioning rod is fixedly mounted on one side of an inner cavity of the ventilation pipeline. A first shaft sleeve is movably mounted on the surface of the first positioning rod, a plurality of first turbulent flow blade plates are fixedly mounted on the surface of the first shaft sleeve, a second positioning rod is fixedly mounted on the other side of the inner cavity of the ventilation pipeline, and a second shaft sleeve is fixedly mounted on the surface of the second positioning rod; a plurality of second turbulent flow blade plates are fixedly mounted on the surface of the second shaft sleeve; through the structural design of the ventilation pipeline, the first positioning rod, the first shaft sleeve, the first turbulent flow blade plate, the second positioning rod, the second shaft sleeve and the second turbulent flow blade plate, the function of reducing the air speed is achieved, and therefore the turbulent flow plates can be driven to rotate relatively through the air flowing speed, and the air speed is reduced.

This utility model relates to the field of zinc ingot surface treatment technology, specifically a scraping device for zinc ingots. It includes a base and a scraping mechanism. A movable seat is slidably mounted on the base. The scraping mechanism includes a rotating seat, a rotary cylinder, a blade, a scraping cylinder, and a scraper. The rotating seat and rotary cylinder are rotatably mounted on the movable seat. The telescopic rod of the rotary cylinder is rotatably connected to the rotating seat, and the rotary cylinder is inclined. The blade is slidably mounted on the rotating seat, and the scraping cylinder is fixedly mounted on the rotating seat. The telescopic rod of the scraping cylinder is fixedly connected to the blade, which is inclined. The scraper is inclinedly mounted on the blade. This zinc ingot scraping device replaces manual labor, automatically scraping away burrs and flash from the surface of zinc ingots. It has high scraping efficiency, good scraping effect, and improves the appearance quality of the zinc ingots.

A conveyor belt module and a method of manufacturing a conveyor belt module by injection molding provide a smooth, uniform blade plate contact surface on the underside of the module, the blade plate contact surface being free of ejector pin impressions generated during the injection molding process. The conveyor belt module includes an ejector pin imprint only on a surface recessed from the blade plate contact surface.

The utility model relates to an efficient radish slitting machine, which belongs to the technical field of radish processing and comprises a frame body, placing pipes are fixedly mounted on two sides of the upper surface of the frame body in an array manner, the placing pipes are communicated with the lower end of the frame body, radishes are vertically placed in the placing pipes during processing, a cutting component is clamped at the lower end of the frame body, and the cutting component is connected with the rack body. A holding frame is fixedly installed at the upper end of the frame body, a driving assembly is fixedly installed in the middle of the upper end of the holding frame, pressing assemblies are connected to the two sides of the holding frame in a sleeving mode, the lower ends of the pressing assemblies are located over the containing pipe, and the driving assembly is meshed with the pressing assemblies. The two sets of pressing assemblies descend alternately, pressing and double-station operation is carried out on radishes in the containing pipe, the slitting efficiency is improved, cutting tools can be replaced conveniently through a tool replacing plate, the radishes can be cut into radish strips with different thicknesses conveniently, and the applicability is high.

The utility model relates to a cutter arm coiling device of a multi-cutter longitudinal cutting machine, and belongs to the field of tire semi-finished product part production devices. The two ends of the cutter arm shaft are square shafts, the middle of the cutter arm shaft is a circular shaft, the two ends of the circular shaft are each provided with a multi-cutter longitudinal cutting machine cutter arm, each multi-cutter longitudinal cutting machine cutter arm comprises a cutter plate, a rib plate and a cutter arm base, an arc groove is formed in the upper portion of the cutter plate, the cutter arm base is arranged below the cutter plate, a through hole is formed in the center of the cutter arm base, and the circular shaft is sleeved with the cutter arm base through the through hole. Rib plates are welded between the lower portions of the cutter plates and the cutter arm seats, a coiling square lever shaft is installed between the upper portions of the two multi-cutter longitudinal cutting machine cutter arms, the two ends of the coiling square lever shaft are designed to be circular shafts, the two rotating wheels are installed at the two ends of the circular shafts, circular grooves are formed in the middles of the circumferential wheel faces of the rotating wheels, and the circular grooves are matched with arc grooves in the upper portions of the cutter plates. A square shaft is arranged in the middle of the coiling square lever shaft. The winding stability of the multi-cutter equipment is improved, the quality of semi-finished tire parts is effectively improved, and waste of manpower and material resources is reduced.

The utility model provides a thread trimming structure of a sewing machine, and belongs to the technical field of sewing machines. The problem of how to improve the operation convenience is solved. According to the thread trimming structure of the sewing machine, the sewing machine comprises a cutter plate, the thread trimming structure comprises a fixed cutter fixed to the cutter plate, the thread trimming structure further comprises a thread hook with a thread hooking groove, a notch of the thread hooking groove is opposite to a cutter head of the fixed cutter, and the thread hook is connected to the cutter plate in a sliding mode. A wire pressing plate which is arranged close to the fixed cutter head and located on one side of the wire hook is fixed to the cutter plate, and the wire pressing plate is tightly pressed on the outer wall, provided with the wire hooking groove, of the wire hook and can seal and cover the wire hooking groove. The thread trimming structure of the sewing machine can improve the operation convenience.

The invention relates to the field of part machining, in particular to a machine tool. Comprising a tool changing plate and a cross, one end of a hydraulic cylinder I is fixedly connected to the lower portion of the tool changing plate, the cross is rotationally connected to the other end of the hydraulic cylinder I, the four ends of the cross are each slidably connected with a driven shaft, a tool is fixedly connected to the lower portion of each driven shaft, and the four tools are different in size. The main shaft is rotationally connected below the tool changing plate, and the driven shaft is rotationally connected with a rotating ring. A sliding block is fixedly connected to the upper portion of the tool changing plate, an ejector rod is slidably connected to the sliding block, the threaded shaft is rotatably connected to the lower portion of the ejector rod, the bottom rod is in threaded connection to the lower portion of the threaded shaft, and baffles are slidably connected to the outer side of the ejector rod and the outer side of the bottom rod. An elastic piece and a base are further included, the elastic piece is fixedly connected to the lower portion of the baffle, an inclined face is arranged on the elastic piece, and the base is fixedly connected to the lower portion of the bottom rod. And machining tools with different sizes can be conveniently and rapidly replaced.