CN104641785A - Grass trimmer driven by LPG engine - Google Patents

Abstract

The invention discloses a grass trimmer driven by an LPG (Liquefied Petroleum Gas) engine. The grass trimmer is characterized in that a low-emission gasoline engine combined with double auxiliary ventilation openings of left and right improved narrowing box bases, tapered-wedge turbulence channeling sheets at scavenging air duct openings and double auxiliary piston skirts is adopted, the carburetor of the grass trimmer is provided with a four-fork nozzle (70a) which is beneficial to be atomized; the grass trimmer is unexpected in emission-reducing and standard-reaching effect; a cutter includes a grass trimming head (54) with a cutting and grass-trimming steel wire (54b) and a steel wire nylon string both which are beneficial to cut for a long term, and the cutter is provided with an external protecting cover (73) arranged on an internal protecting cover (60) and a long-time grass pressing wheel (74) arranged on the external protecting cover, and the roller length of the long-time grass pressing wheel (74) is equal to the grass trimming diameter, thus the cutter is convenient to press grasses, preserve soil moisture and decorate grasslands. Propane in a micro propane fuel tank reaches 99% and has few impurities. The micro propane fuel tank is made of a high-pressure extrusion die. The grass trimmer is safe, environmentally friendly, easy to exchange and universally applied to multiple countries, thus the grass trimmer is very popular for international markets.

Description

LPG gas engine-driven mower

Technical field

The invention provides one and cut off shrub, the mower of flowers and trees shaping and mower for places such as flower bed, garden, park and road sides, belong to machine field, gardens.By the innovative approach by discharge indirectly after the catalase hush tube of a meter five, for expanding purposes, brush saw installs additional disc cutterbar and the carburetor four bifurcated nozzle that moving head and the inside and outside sawtooth of band piling up neatly wire of beating the grass cut by band, and be convenient to the long grass pressing wheel of pressing grass soil moisture conservation and meadow decorative pattern, to form Low-emission gasoline brush cutter.Have the combustion chamber of function wave and with the collocation of internal combustion engine ignition device having active receiving electrode and fine motion discharge electrode, have and reduce hydrocarbon emission in Jia Shuanfu shirt rim, piston skirt, and logarithmic differentiation isogonal line shirt rim, piston skirt turbulent flow returns and alters and fall row, the two auxiliary blow vent narrowing left and right block is had to reduce the multiple method of discharge, managing the engine of low emission, is the present inventor's crystallization that lifetime, domestic and foreign experience was groped; Belong to the technical field of internal combustion engine and energy-saving and emission-reduction.Known two to rush gasoline engine emissions difficulty up to standard, existing beyond thought emission reduction effect can be up to standard, it has been determined in the application that two rush gasoline engine scavenging road junction and has started batch product, imply that the developing direction of Two decades years Low-emission gasoline two impact machine and brush saw and mower from now on, start the new technical field of mower.The propane degree of LPG gas engine-driven mower fuel tank is high, and safety and environmental protection easily exchanges with multi-country universal market wide.

Background technology

Mower is widely used in the places such as flower bed, garden, park and road side and cuts the grass on a lawn, tending [after young plantation, and tea place upgrades, and herbage is gathered in, straw-returning, and flowers and trees shaping etc. cut off the operation of shrub branch; Carry out brush by the mode selected by the hobby of people.Some operation pedestrian like and custom brush saw time, the local time in of particularly running into corner, use and press mobile jib energetically, do mobile jib often locate do not live and trace waves.The height of operation pedestrian is different, and custom takes the difference of operating angle, needs mobile jib adjustable length, and the round type linkage of original location mobile jib, leave the shortcoming easily causing mobile jib trace and rock.The low vibratility of low vibration lawn mower and low noise, if consider, at the foamed plastics of stock plus-minus vibration, can have certain curative effect; And the very large root of vibration and noise is not only in precision and the form and position tolerance of power and instrument, and be mechanism, catalyst, hush tube, vibration-damped handle, cutter coordinates with the harmony of engine, and low vibration and the low emission of pursuing mower are in fact hard nut to cracks left over for a long time.Adopt two stroke engine can improve power per liter more than 50% relative to four-stroke engine, but be really difficult up to standard in discharge, this is a part of problem of the present invention; Mower is portable dam, wishes that power is gently little; Two-stroke or four-stroke gasoline engine all want igniter, engine spark plug, are widely used in high voltage pulse electric current to be introduced into combustion chamber, make the gaseous mixture sparking of inspiration cylinder and light, and then diffusion combustion break out work done.Between the outside coupling of existing spark plug and the spark cap having rubber jar, sometimes there is loosely loose phenomenon., though be provided with glass-sealing agent to make resistance, only there is impedance the inside of existing spark plug; If the induction reactance of adding and capacitive reactance, form suitable RCL loop, then have the effect more preferably suppressing radio interference.Multiple tracks umbrella rib on insulator also can be improved to saw-tooth shaped cross section by semi-circular cross-section, so that the creepage passage of more insulation and better block rubber jar.The heat radiation of the metal shell of existing spark plug also can further improve.The electrode of existing spark plug, well imagines, has easily coking, easy ablation, single-point arcing, the shortcoming of low temperature difficult point; If electrode innovation for movable, when there being improvement.Moreover it is not original combustion chamber has multiple, but out of this world; Except crossing advantage, there is weak point; Such as wedge-section combustion chamber, its gaseous mixture undue concentration is at spark plug place, and operating mode seems rough; And for example bathtub shaped combustion chamber, the shape of its prolate, make the effectiveness comparison of squish poor, flame travel is also longer, and burn rate is lower, and burning time is long, and rate of explosion is low, and surface to volume ratio F/V is comparatively large, is disadvantageous to HC discharge.And for example bowl-in-piston chamber, hemispherical combustion chamber, fluffy shape combustion chamber, and other types combustion chamber, as the auxiliary combustion chamber of turbulization, dual ignition plug combustion chamber, the combustion chamber of plane, each has something to recommend him; But the invention that the mankind aspire after perfection is endless, piston also has very large potentiality to dig.The so-called best geometry of combustion chamber and piston is no doubt important, but with engine model adaptation and will arrange in pairs or groups with igniter, just has preferably effect.Particularly two-stroke gasoline engine is poorer than the fuel economy of four-stroke gasoline engine, and the hydrocarbon emission in tail gas often exceeds standard.Combustion chambers of internal combustion engines and piston and the collocation with igniter are hard nut to cracks relating to energy-saving and emission-reduction.If by four-stroke engine, exert oneself less; If with booster, volume is large; If with diesel engine, the easily soiled person; By the waste gas put that runs near the engine direct of people, hover at engine environment, portion can be sucked by engine air filter and carburetor air mouth, and portion can be sucked by people.Brush saw can only brush and can not beating the grass; Just can dual-use if install moving head additional at cutter head; The meadow just beaten, some grass has by the phenomenon of being pulled out pine, if with grass pressing wheel, not only has the effect of the soil moisture conservation of pressure grass and extrusion meadow decorative pattern, and makes smooth operation and laborsaving; The bush knife of common flat sword, because the effect of sliding cutting is more than the effect of impact cutting, encountering hard branch bar just has cutter relieving phenomenon sometimes, if just can improve with the cutter of band portion sawtooth; It is long to cut buttress wire life-span of beating the grass; If admission can be optimized further with the improvement of carburetor four bifurcated nozzle; And known two rush gasoline engine emissions difficult up to standard after, rush petrol engine if be used in Jia Shuanfu shirt rim, piston skirt and return the low emission two of altering sheet at scavenging road junction wedge turbulent flow, make when improveing further brush saw and mower up to standard.

Summary of the invention

In order to make up the shortcoming caused by the existing mechanism of mower, mobile jib is made to locate reliably and not micro-ly to wave, the low vibratility of brush saw and low noise are improved, improve and exert oneself and cutting effect, reduced exhaust, the present inventor has done the improvement of many brush saw mowers, with the single-cylinder air-cooled petrol engine of small two-stroke containing the many scavenging ports of improvement, as E134F, former stock changes the hush tube of many honeycombs and catalyst into, there is transparent protective cover, there is the bush knife of periphery blade and inner circumferential blade, there is the stock interface not easily loosened of limit flange and lateral filament button, there are spiral spring or wave spring and the hand handle of vibration damping, there is the carburetor of inside spin whirlpool nozzle, form novel have catalase hush tube and swirl sprayer and two and rush the brush saw of many scavenging ports gasoline engine, it is a kind of Low-emission gasoline brush cutter.Brush saw can only brush and can not beating the grass; Just can dual-use if install moving head additional at cutter head; The meadow just beaten, some grass has by the phenomenon of being pulled out pine, if with grass pressing wheel, not only has the effect of the soil moisture conservation of pressure grass and extrusion meadow decorative pattern, and makes smooth operation and laborsaving; The bush knife of common flat sword, because the effect of sliding cutting is more than the effect of impact cutting, encountering hard branch bar just has cutter relieving phenomenon sometimes, if just can improve with the cutter of band portion sawtooth; It is long to cut buttress wire life-span of beating the grass; If admission can be optimized further with the improvement of carburetor four bifurcated nozzle; And known two to rush gasoline engine emissions difficulty up to standard, find to be used in Jia Shuanfu shirt rim, piston skirt and to return the low emission two of altering sheet at scavenging road junction wedge turbulent flow to rush petrol engine, make when improveing further brush saw and mower up to standard.Therefore for expanding purposes, on Low-emission gasoline brush cutter basis, installing moving head additional, grass pressing wheel, band serrated knife, cuts buttress and to beat the grass wire and the improvement of carburetor four bifurcated nozzle, forms Low-emission gasoline brush cutter.The engine of low emission, be internal combustion engine improvement have the combustion chamber of function wave and with have active receiving electrode and fine motion discharge electrode internal combustion engine ignition device collocation basis on, and reduce on the petrolic basis of hydrocarbon emission in Jia Shuanfu shirt rim, piston skirt, and to return at logarithmic differentiation isogonal line shirt rim, the piston skirt turbulent flow improved and alter and fall on the petrol engine basis of row, the two auxiliary blow vent narrowing left and right block of further improvement reduces two of discharge and rushes petrol engine, belongs to the combustion chamber of internal combustion engine and the technical field of turbulent scavenging.In Jia Shuanfu shirt rim, piston skirt with return the low emission two of altering sheet at scavenging road junction wedge turbulent flow and rush petrol engine, be collect the crystallization that domestic and foreign experience for many years gropes; Its usefulness achieves beyond thought reduction of discharging effect up to standard, and brush mower is dual-purpose.

Everybody knows that two impact machine discharges often exceed standard, but nobody can thoroughly solve; Described scavenging road junction wedge turbulent flow returns alters sheet, and be add small pieces at the scavenging road junction of two-stroke cylinder, seem simple, but nobody can find out; Be who the unexpected small pieces that will go at the scavenging road junction place of cylinder to burn-on refill up and start the engine and contact with high speed piston because that can not think to anticipate, also dare not do even if contemplate, what that may damage.But the sudden caprice often having an examination in arms just has amazing effect, and this is after travelling far and wide in search of it, thousand consider and occasionally have one to obtain, and are again grope the crystallization with domestic and foreign experience for many years, unexpectedly have and reduce discharging effect up to standard.Moreover the carburetor of engine has the potential to be tapped very much, if four bifurcated nozzles refer to the nozzle of the inside at carburetor outlet on along establishing 4 gaps to be four bifurcated nozzles in ring week, therefore improve the fluid state of mixing combustion vapour through gap and be beneficial to atomization.Although it is very complicated that spark-ignition process and two rushes detailed physical and chemical processes, the mankind still have many aspects not clear so far, but we perhaps can tentatively think, this scavenging road junction wedge turbulent flow returns alters sheet, turbulent flow is produced at scavenging road junction place's wedge, the possibility channeling to gas handling system is returned to exhaust gases after combustion and has retardation, its doubtful turbulent flow that belongs to is taken a breath, for the known cross flow scavenging of two-stroke internal combustion engine, loop scavenging and uniflow scavenging three kinds of ventilation scheme, open an approach of altering sheet at scavenging road junction wedge turbulent flow time that can reduce discharging, referred to as the clino-diagonal of turbulent scavenging, or the shortcut of low emission.Although the mechanism of its atom level needs to be explored future, it has been determined in the application that two rush gasoline engine scavenging road junction and has started batch product, represents the developing direction of Two decades years Low-emission gasoline brush cutter from now on.Cut buttress wire of beating the grass more durable than nylon wire many, be not only beneficial to long-acting cutting, few with line, save into dish nylon wire; And can beat the grass, can also stalk be cut, and nylon wire cuts motionless thin bar; Beat the grass when cutting different object wire and disc cutterbar complement each other each has something to recommend him.Its roller of long grass pressing wheel is long, and the diameter that equals to beat the grass then just in time can be pressed onto the grass just cut, to press careless successful.With the grass pressing wheel of thin length so that pressure grass soil moisture conservation, material-saving, roll cover face high, meadow embossing is attractive in appearance.

The present invention solves technical scheme that its technical problem takes and method is:

A kind of Low-emission gasoline grass-mowing machine, containing the single-cylinder air-cooled petrol engine of small two-stroke, stock, cutter, manipulating handgrip assembly, described stock is provided with aluminum pipe, described aluminum pipe inside is provided with cavity, power transmission shaft is provided with in the cavity of described aluminum pipe, its upper end of described aluminum pipe and power transmission shaft is equiped with described engine, and its lower end of described aluminum pipe and power transmission shaft is equiped with described cutter, and the middle part of described aluminum pipe is equiped with described hand handle; It contains only 1 type hex nut M6 (4), PP wire clamp (5), only 1 type non-metallic insert hexagonal locking nut M5 (7), POM suspension ring holder (8), hexagon socket cap head screw M5x20 (9), the front aluminum pipe that connects of PA suspension ring (6), 4 of engine 1E34-48 (1), hexagon socket cap head screw M6x30 (2), hexagon socket cap head screw M5x8 (3), 3 described Low-emission gasoline brush cutter (10), manipulating handgrip assembly (11), control handle pipe (12), 13 only band bullet pad hexagon socket cap head screw M5x25 (13), hand holder train wheel bridge (14), hand holder (15), left hand handle component (16), acrylonitrile-butadiene rubber hand shock-absorbing sleeve (17), hand holder lower plate (18), left handle pipe (19), five leaf nylon tubes (20), power transmission shaft (21), deep groove ball bearing (22), bullet pad 6 (23), hexagon socket cap head screw M6x23 (24), aluminium tube joint (25), locking knob (26), shaft adapter (27),Rear aluminum pipe (28), 4 hexagon socket cap head screw M5x12 (29), 4 spring washers 5 (30), spacing handle spring (31), spacing handle lock (32), spacing handle (33), split washer 2.5 (34), protective cover holder (35), circlip for hole 26 (36), circlip for shaft 10 (37), small arc-shaped gear (38), small arc-shaped gear oil blocks up (39), hexagon socket cap head screw M6x14 (40), hexagon socket cap head screw M6x10 (41), plain washer 6 (42), gear-box (43), orthodrome gear (44), splined shaft (45), deep groove ball bearing 6002 (46), circlip for hole 32 (47), gear-box guard shield (48), spline pad (49), 3 tooth disc cutterbars (50), cutterhead pressing plate (51), cutterhead guard shield (52), 1 type hex nut M10 left-handed (53), nylon moving head (54), braces (55), hexagon nut with flange M5 (56), small blade (57), knife rest (58), cross recessed pan head tapping screw ST4x14 (59), protective cover A (60), shielding support (61), hexagon socket cap head screw M5x35 (62), 2 tooth disc cutterbars (63), 4 tooth disc cutterbars (64), 8 tooth disc cutterbars (65), left hand is (16-1), 1 type hex-head nut M5 (16-2), Cross Recess Head Screw M5x20 (16-3), Cross Recess Head Screw M5x30 (16-4), there is the waistband (66) of pallet (67), the auxiliary ball (68) that turns, catalase hush tube (69), described engine, or with little to 1E32F, or with greatly to 1E48F, it comprises starter assembly (F1), start driver plate assembly (F2), 2 oil sealings (F3), right case (F4), 2 deep groove ball bearings (F5), hexagonal cylindrical head plain cushion screw assemblies M5 × 45 (F6) in 2 moment of torsion 7-9NM, the muffler ASSY (F7) of catalase hush tube (69), silencer pad (F8), the right shock-reducing sleeve of fuel tank (F9), 2 retaining ring for piston pins (F10), piston pin (F11), needle bearing (F12), piston (F13), piston ring (F14), crank assemblby (F15), woodruff key (F16), cylinder block pad (F17), cylinder block (g44), hexagonal cylindrical head screw assemblies M5 × 20 (F19) in 2, engine outer cover (F20), recessed pan head tapping screw ST5 × 14 (F21), igniter assembly (F22), 2 cross fluting screw assemblies M4 × 20 (F23),Spark plug (F24), without asbestos packing sheet mould assembling pad (F25), 2 mould assembling alignment pins (F26), left box body (F27), 5 cross fluting screw assemblies M5 × 25 (F28), magnetic flywheel (F29), clutch assembly (F30), clutch disk (F31), circlip for shaft (F32), the left shock-absorbing sleeve L of fuel tank (F33), the right shock-absorbing sleeve R of fuel tank (F34), inserts bearing connection seat (F35), 3 cross fluting screw assemblies M5 × 20 (F36), train wheel bridge shock-absorbing sleeve (F37), lower plate shock-absorbing sleeve (F38), train wheel bridge (F39), lower plate (F40), hexagonal cylindrical head screw assemblies M5 × 18 (F41) in 2, flame-out wire clamp (F42), air filter seat (F43), 2 air filter seat pad covers (F44), soft polyurethane foam filter core (F45), air filter pressing plate (F46), 2 M5 bullet pads (F47), 2 cross fluting coiled hair bullet screw M5 × 63 (F48), air filter lid (F49), cross slotted panel head screw assemblies M5 × 14 (F50), 2 air inlet pipe pads (F51), deflector (F52), polyphenylene sulfide PPS air inlet pipe (F53), grounding wire component (F54), without asbestos packing sheet carburetor packing (F55), carburetor assembly (F56), PU yellow transparent oil return pipe (F57), PU black oil inlet pipe (F58), oil-resistant acrylonitrile-butadirubber rubber oil pipe seat (F59), fuel filter assembly (F60), oil pipe clip (F61), HDPE blowing fuel tank (F62), cap assembly of fuel tank (F63), 5-7NM hexagon-headed bolt plain cushion combination M6X14 (F64), 4 3-5NM cross fluting screw assemblies M5X18 (F65), its engine 1E34-48 (1) comprising of described gasoline brush cutter, by described hexagon socket cap head screw M6x30 (2), hexagon socket cap head screw M5x8 (3), and 31 type hex nut M6 (4) only, with described before connect aluminum pipe (10) and be connected, the outside of the pipe of aluminum pipe (10) is connect before described, by only 1 type non-metallic insert hexagonal locking nut M5 (7), POM suspension ring holder (8), hexagon socket cap head screw M5x20 (9) form harness portion with braces (55) of described PP wire clamp (5), PA suspension ring (6), 4, to braces is worn on single shoulder, the aluminum pipe connecing before described (10) upper, be equiped with manipulating handgrip assembly (11), be by control handle pipe (12), many band bullet pad hexagon socket cap head screw M5x25 (13),Hand forms shock-absorbing sleeve (17), hand holder (15), left hand handle component (16), acrylonitrile-butadiene rubber hand holder train wheel bridge (14), hand holder lower plate (18), left handle pipe (19) jointly, before described, connect the inside of the pipe of aluminum pipe (10), be equiped with five described leaf nylon tubes (20), power transmission shaft (21) and deep groove ball bearing (22) so that transmission, before described, connect aluminum pipe (10) by described bullet pad 6 (23), hexagon socket cap head screw M6x23 (24), aluminium tube joint (25), locking knob (26), shaft adapter (27), with described rear aluminum pipe (28) connection, and formed spacing Handleset by 4 hexagon socket cap head screw M5x12 (29), 4 spring washers 5 (30), spacing handle spring (31), spacing handle lock (32), spacing handle (33), split washers 2.5 (34), in the end of described rear aluminum pipe (28), be equiped with described protective cover holder (35), circlip for hole 26 (36), circlip for shaft 10 (37), small arc-shaped gear (38), small arc-shaped gear oil blocks up (39), and many band bullet pad hexagon socket cap head screw M5x25 (13), hexagon socket cap head screw M6x14 (40), hexagon socket cap head screw M6x10 (41), plain washer 6 (42), and gear-box (43), orthodrome gear (44), splined shaft (45), deep groove ball bearing 6002 (46), circlip for hole 32 (47), gear-box guard shield (48), spline pad (49), 3 tooth disc cutterbars (50), cutterhead pressing plate (51), cutterhead guard shield (52),Described cutter contains protective cover and moving head and disc cutterbar to select; 1 described type hex nut M10 left-handed (53) of dress cutterhead; Or dress nylon moving head (54) is to replace disc cutterbar, and the described small blade (57) of line that cut-out is beaten the grass, be contained in described protective cover (60) by hexagon nut with flange M5 (56), knife rest (58), cross recessed pan head tapping screw ST4x14 (59) upper, and shielding support (61) and hexagon socket cap head screw M5x35 (62) will be installed; Cutterhead has multiselect, or 2 tooth disc cutterbars (63), or the disc cutterbar of 4 teeth (64), or 8 tooth disc cutterbars (65), so that the shrub of different cultivars is cut in choosing; Described left hand handle component (16), by left hand, (16-1), 1 type hex-head nut M5 (16-2), Cross Recess Head Screw M5x20 (16-3), Cross Recess Head Screw M5x30 (16-4) are formed, be arranged in left handle pipe (19); And there is the waistband (66) of pallet (67), people waist can be tied up to, pallet (67) and auxiliary ball (68) movable contact that turns, auxiliaryly turn ball (68) and be connected with engine outer cover (F20), to lengthen cut coverage further; Described catalase hush tube (69), connects the gas outlet of muffler ASSY (F7), so that waste gas is discharged near cutter through aluminum pipe; Described engine, or with 1E30, or greatly to 48 cylinder diameter; Engine start part comprises starter assembly (F1), starts driver plate assembly (F2), is furnished with 2 oil sealings (F3) and 2 deep groove ball bearings (F5), to be contained in rotationally on the described right case (F4) of engine; By hexagonal cylindrical head plain cushion screw assemblies M5 × 45 (F6) in 2 moment of torsion 7-9NM, the muffler ASSY of catalase hush tube (69) (F7) and silencer pad (F8), be fixed on cylinder block (g44); The right shock-reducing sleeve of fuel tank (F9) cylinder block (g44) is equipped with; Built with 2 retaining ring for piston pins (F10), piston pin (F11), needle bearing (F12), piston (F13), piston ring (F14) and crank assemblby (F15), bent axle is established woodruff key (F16) at cylinder block (g44); Cylinder block pad (F17) is mounted on cylinder block (g44); 2 interior hexagonal cylindrical head screw assemblies M5 × 20 (F19) and recessed pan head tapping screw ST5 × 14 (F21) are fixed on engine outer cover (F20) on cylinder block (g44); Igniter assembly (F22) is fixing by 2 crosses screw assemblies M4 × 20 (F23) of slotting; Spark plug (F24) is also contained on cylinder block (g44); Cylinder block (g44) is put without asbestos packing sheet mould assembling pad (F25), 2 mould assembling alignment pins (F26), and fixed left box body (F27) with 5 cross fluting screw assemblies M5 × 25 (F28); Magnetic flywheel (F29) is contained on bent axle, and matches with clutch assembly (F30), clutch disk (F31) and circlip for shaft (F32);The right shock-absorbing sleeve R of the left shock-absorbing sleeve L of fuel tank (F33) and fuel tank (F34) is contained on described outer cover (20); Inserts bearing connection seat (F35) is fixed by 3 crosses screw assemblies M5 × 20 (F36) of slotting; Described connection seat (F35) is equipped with train wheel bridge shock-absorbing sleeve (F37), lower plate shock-absorbing sleeve (F38) and train wheel bridge (F39) lower plate (F40), and clamps with hexagonal cylindrical head screw assemblies M5 × 18 (F41) in 2; Flame-out wire clamp (F42) described connection seat (F35) is also equipped with; Air filter seat (F43), 2 air filter seat pad covers (F44), soft polyurethane foam filter core (F45), air filter pressing plate (F46) are formed air filter by 2 M5 bullet pads (F47) and 2 cross fluting coiled hair bullet screw M5 × 63 (F48) air filter lids (F49), cross slotted panel head screw assemblies M5 × 14 (F50), and are packed on carburetor; 2 air inlet pipe pads (F51), deflector (F52), polyphenylene sulfide PPS air inlet pipe (F53), grounding wire component (F54), without asbestos packing sheet carburetor packing (F55), carburetor assembly (F56) composition carburetor; PU yellow transparent oil return pipe (F57), PU black oil inlet pipe (F58), oil-resistant acrylonitrile-butadirubber rubber oil pipe seat (F59), fuel filter assembly (F60), oil pipe clip (F61), HDPE blowing fuel tank (F62), cap assembly of fuel tank (F63) composition fuel tank; And 5-7NM hexagon-headed bolt plain cushion combination M6X14 (F64) is fixing described startup driver plate assembly (F2), as 4 3-5NM crosses fluting screw assemblies M5X18 (F65) be fixing described starter assembly (F1); The described waistband that has pallet (67) (66) is provided with pallet (67), pallet (67) can be placed the auxiliary ball (68) that turns, and auxiliary turn ball (68) and be contained in external engine, or directly brush cutter engine is placed on the operation that comes up of pallet (67) that waistband (66) is provided with; Pallet (67) and auxiliary ball (68) movable contact that turns, auxiliaryly turn ball (68) and be connected with engine outer cover (F20), to lengthen cut coverage further; Described catalase hush tube (69), one termination is led to the gas outlet of muffler ASSY (F7), and its another termination aluminum pipe so that waste gas is through described aluminum pipe, and is discharged near cutter; Described catalase hush tube (69) is aluminum, has waste gas by there is aluminium dioxide catalyst effect; Described muffler ASSY (F7) is aluminum, has waste gas by there is aluminium dioxide catalyst effect; Before described, connect aluminum pipe (10) and rear aluminum pipe (28) or separate, or an aluminum pipe, having waste gas by there is aluminium dioxide catalyst effect; Five leaf nylon tubes in described aluminum pipe are established foam honeycomb body, and add catalase catalyst at foam honeycomb body, so as to have waste gas by time have a catalyst multiple catalyzing effect; 2 described tooth disc cutterbars (63), 4 tooth disc cutterbars (64), 8 tooth disc cutterbars (65) supply to select,Be commonly referred to as the disc cutterbar of cutter, it is provided with multiple outer cutting edges (641) in cutterhead periphery, so that the few cutter relieving of brush; Described 2 tooth disc cutterbars (63), 4 tooth disc cutterbars (64), 8 tooth disc cutterbars (65) supply to select, and it is provided with multiple inner cutter holes (642) in cutterhead periphery, so that card branch in brush; In described carburetor assembly (F56), improve the interior straight tube (70) of atomizer for there being the vortex spray bar of helicla flute (71), be beneficial to disperse mixed effect; In described carburetor assembly (F56), the import of the interior straight tube (70) that improves atomizer or the vortex spray bar that has helicla flute (71) is for there being parabolical horn mouth (72), or the horn mouth of conical section as archimedes curve, is beneficial to polymerization contaminated product effect; Upper in described left handle pipe (19), be provided with the damping adapter (19b) of close circle helical spring shape, so that damping further; Adopt and have the protective cover (60) of transparent or partially transparent, in order to convenient observation brush operation; The single-cylinder air-cooled petrol engine of small two-stroke that this brush cutter adopts, little of 1E32, greatly to 1E47.5, multiplex 1E34F or 1E39F; Belong to the engine of low emission, in the combustion chamber that has function wave of the improvement of internal combustion engine and with on the basis of the collocation of the internal combustion engine ignition device that has active receiving electrode and fine motion discharge electrode, and on the petrolic basis of Jia Shuanfu shirt rim, piston skirt reduction hydrocarbon emission, and return alter on the petrol engine basis that falls row at logarithmic differentiation isogonal line shirt rim, improved piston skirt turbulent flow, the further improved two auxiliary blow vent that narrows left and right block reduces two of discharge and rushes petrol engine; In Jia Shuanfu shirt rim, piston skirt, unexpectedly have and reduce discharging effect up to standard; Logarithmic differentiation isogonal line shirt rim, piston skirt turbulent flow returns and alters the petrol engine that falls row is to be equipped with two auxiliary shirt rims (g37) in the skirt section of piston (g37); Described two auxiliary shirt rim (g37) is on the basis of former two shirt rims of the bilateral that there is not connecting rod pin-and-hole of original piston, the bilateral that has connecting rod pin-and-hole in the skirt section of piston (g31) following, an auxiliary shirt rim is added on every one side, can be described as two auxiliary shirt rims (g37); Described two auxiliary shirt rim, it is containing the through hole (g43) of concave arc limit (g42), piston and two auxiliary shirt rims on base (g38), lower fillet (g39), side (g40), upper fillet (g41), base, isogonal one section of piston skirt logarithmic differentiation equation is located at shirt rim, it is conducive to auxiliary guiding, additional turbulence is returned and is altered and fall row, and lubrication assistant and heat radiation; Described two auxiliary shirt rim or with aluminium alloy, or with composite to reduce cylinder prepareding gap; Each auxiliary shirt rim of described two auxiliary shirt rim (g37) and described former two shirt rims are all the cylindrical prolongations along outside piston week, and its projection is thrown on the face vertical with piston movement direction along the outside piston week quartering; Each auxiliary shirt rim of described two auxiliary shirt rim (g37) than described former two shirt rims along the cylinder in outside piston week extend longer, that is to say,The base (g38) of two auxiliary shirt rims is more farther than base distance connecting rod pin-and-hole on the direction of the cylinder extended line along piston of former two shirt rims, namely two auxiliary shirt rims are higher, piston and skirt section are longer, and its effect is to be conducive to the guiding length of lengthened piston and auxiliary guiding, the both sides of described two auxiliary shirt rim (g37) are provided with the side (g40) of two auxiliary shirt rims, the base (g38) of its connection piston (g31) and two auxiliary shirt rims, the both sides of described two auxiliary shirt rim (g37), be provided with the side (g40) of two auxiliary shirt rims on the base (g38) of connection piston (g31) and two auxiliary shirt rims, the angle of the side (g40) of its both sides is greater than 100 degree, the both sides of described two auxiliary shirt rim (g37) are provided with the side (g40) of two auxiliary shirt rims, and it is to be connected piston (g31) by the upper fillet (g41) of the side of two auxiliary shirt rims, the both sides of described two auxiliary shirt rim (g37) are provided with the side (g40) of two auxiliary shirt rims, and it is the base (g38) that lower fillet (g39) by the side of two auxiliary shirt rims connects two auxiliary shirt rims, concave arc limit (g42) is established on the base of described two auxiliary shirt rim (g37), described concave arc limit (g42) or circular arc, or involute, or parabola, or other functions, fall row in order to assisting, through hole (g43) is established in described two auxiliary shirt rim (g37), or pit, in order to lubrication assistant and heat radiation, upper and the piston in described two auxiliary shirt rim (g37) is provided with multiple through holes (g43), and it slightly arranges in del, and have many rows, the most descending through hole is few, and the Kong Yue that more up works is many, in order to lubrication assistant and heat radiation, cylinder body (g44) is two cylinder bodies (g44) that rush the scavenging road junction (g45) of centrally containing around each one on the petrolic cylinder chamber at dress piston symmetrically, on the scavenging road junction of the symmetrical left and right of described cylinder body (g44) each (g45), respectively each ground, left and right is provided with wedge turbulent flow time and alters sheet (g46) symmetrically, utilize the feature that the logatithmic spiral tool pressure angle of higher mathematics is equal, described sheet is made to have a section of the logatithmic spiral by logarithmic differentiation equation, then gush mixed air-flow thereon just easily steadily, block waste gas and return in order to utilize equal pressure angle to produce turbulent flow at scavenging road junction place and alter to reduce discharge, described wedge turbulent flow goes back to the side of the outlet of the scavenging air belt of pressing close to piston that closes on lower dead center of the bottom of the bottom of altering the scavenging road junction (g45) that sheet (g46) is located at cylinder body, a section of its tool logatithmic spiral, described wedge turbulent flow return alter that sheet (g46) comprises that wedge turbulent flow returns that the scavenging road junction (g47) of altering sheet, wedge (g48), wedge turbulent flow that wedge turbulent flow goes back to the logical scavenging road junction of altering sheet go back to the logical scavenging road junction of altering sheet return the turbulent shield (g50) of altering grid (g49), wedge turbulent flow and going back to the logical scavenging road junction of altering sheet, all sections of tool logatithmic spiral, described wedge turbulent flow returns alters sheet (g46) slightly in inclined wedge-shaped, the large end of described inclined wedge-shaped is connected to the side of the outlet of the scavenging air belt of pressing close to piston that closes on lower dead center of the bottom of the bottom at the scavenging road junction (g45) of cylinder body, a section of its tool logatithmic spiral,Described wedge turbulent flow returns alters wedge turbulent flow that sheet (g46) comprises and goes back to the scavenging road junction (g47) of altering sheet and be located at described wedge turbulent flow and go back to the top of altering sheet (g46), that is returns a section of its tool logatithmic spiral of small end of the inclined wedge-shaped of altering sheet (g46) at wedge turbulent flow, described wedge turbulent flow returns alters wedge (g48) that described wedge turbulent flow that sheet (g46) comprises goes back to the logical scavenging road junction of altering sheet and is located at wedge turbulent flow and returns the inner side of altering sheet (g46) and the bottom connection with the bottom at the scavenging road junction (g45) of cylinder body, a section of its tool logatithmic spiral of described inner side, described wedge turbulent flow goes back to the intersection of going back to the side of altering the outlet that grid (g49) are located at the scavenging air belt that wedge turbulent flow goes back to the scavenging road junction (g45) of altering sheet and cylinder body of altering described wedge turbulent flow that sheet (g46) comprises and go back to the logical scavenging road junction of altering sheet, a section of its tool logatithmic spiral, described wedge turbulent flow goes back to the chamfering place of going back to the side of altering the outlet that grid (g49) are located at the scavenging air belt that wedge turbulent flow goes back to the scavenging road junction (g45) of altering sheet and cylinder body of altering described wedge turbulent flow that sheet (g46) comprises and go back to the logical scavenging road junction of altering sheet, a section of its tool logatithmic spiral, described wedge turbulent flow goes back to the rounding place of going back to the side of altering the outlet that grid (g49) are located at the scavenging air belt that wedge turbulent flow goes back to the scavenging road junction (g45) of altering sheet and cylinder body of altering described wedge turbulent flow that sheet (g46) comprises and go back to the logical scavenging road junction of altering sheet, a section of its tool logatithmic spiral, described wedge turbulent flow returns the turbulent shield (g50) that is provided with the logical scavenging road junction that wedge turbulent flow go back to is altered sheet above of altering sheet (g46), its one end be located at wedge turbulent flow and go back to the chamfering place of altering sheet crossing with the side of the outlet of the scavenging air belt at the scavenging road junction (g45) of cylinder body and be connected, and its other end and wedge turbulent flow time are altered the small end of that is top of sheet alters sheet (g46) for turbulent time inclined wedge-shaped with wedge and are connected, and a section of its tool logatithmic spiral above of described turbulent shield, the two auxiliary blow vent that narrows left and right block reduces two of discharge and rushes petrol engine, containing left block, right block, piston, and known combustion chamber, spark plug, cylinder body, cylinder cap, cylinder barrel, connecting rod, crankcase, lubricating oil pump, lubricating system, fuel system, ignition system, cooling system, described cylinder body (g44) is two cylinder bodies (44) that rush the scavenging road junction (g45) of centrally containing around each one on the petrolic cylinder chamber at dress piston symmetrically, on the scavenging road junction of the symmetrical left and right of described cylinder body (g44) each (g45), respectively each ground, left and right is provided with wedge turbulent flow time and alters sheet (g46) symmetrically, the skirt section of described piston is equipped with two auxiliary shirt rims (g37), described two auxiliary shirt rim (g37) is on the basis of former two shirt rims of the bilateral that there is not connecting rod pin-and-hole that retains original piston, and the bilateral that has connecting rod pin-and-hole in the skirt section of piston (g31) is following, an auxiliary shirt rim is added on every one side, can be described as two auxiliary shirt rims (g37), described two auxiliary shirt rim, it is containing the through hole (g43) of concave arc limit (g42), piston and two auxiliary shirt rims on base (g38), lower fillet (g39), side (g40), upper fillet (g41), baseThe logarithm line of its piston skirt logarithmic differentiation equation of described piston also claims that isogonal one section is located at shirt rim, the limit of the part of its shirt rim is a section that pressure angle approaches the equal logatithmic spiral by logarithmic differentiation equation, utilize the feature that the logatithmic spiral tool pressure angle of higher mathematics is equal, make sheet have one section of logatithmic spiral and block waste gas and return in order to utilize equal pressure angle to produce turbulent flow at scavenging road junction place and alter to reduce discharge, described two auxiliary shirt rim or with aluminium alloy, or with composite to reduce cylinder prepareding gap, use CNC machining center, tungsten copper electrode first be made, with the auxiliary molding of the lathe that has three-dimensional rotation head, then produce in batches with die casting machine, machined and plating again, described left block and its left block of right block and right block are respectively provided with and change the little two auxiliary blow vent narrowing, described two auxiliary blow vent is located at left block and is just called left two auxiliary blow vent (51b), described two auxiliary blow vent is located at right block and is just called right two auxiliary blow vent (52b), described left block and right block are to assemble Face to face, and with being connected above of the scavenging air belt of cylinder body, the right side pair auxiliary blow vents (52b) that the two auxiliary blow vents (51b) in a left side that two scavenging air belts of described cylinder body are provided with described left block (51) respectively and described right block (g52) are provided with are connected, it is the two auxiliary blow vent of the left and right block that narrows, when the two auxiliary shirt rim (g37) being equipped with when described two auxiliary blow vent and the skirt section of described piston that runs to piston lower approaches, just be beneficial to and narrow local volumetric, strengthen local air flow pressure and flow velocity and additional turbulence is returned and altered and fall row, the wedge turbulent flow that upper each each ground, left and right symmetrically, scavenging road junction (g45) of the symmetrical left and right each of the described two auxiliary blow vent that narrows left and right block and described cylinder body (g44) is provided with returns alters both adapteds of sheet (g46), has the row's of falling effect, both adapteds of two auxiliary shirt rim (g37) that the skirt section of the described two auxiliary blow vent that narrows left and right block and described piston is equipped with, have the row's of falling effect, the described two auxiliary blow vent that narrows left and right block, the wedge turbulent flow being provided with upper each each ground, left and right symmetrically, scavenging road junction (g45) of the symmetrical left and right each of described cylinder body (g44) returns alters sheet (g46), and with two auxiliary shirt rim (g37) three's adapted that the skirt section of described piston is equipped with, have more to fall row's effect, the rear wall (51f) of the two auxiliary blow vents (51b) in a left side that the described left block (g51) of the described two auxiliary blow vents that narrow left and right block is provided with is thicker, the minimum 2mm that is greater than of thinnest part, and there is the oblique angle that is greater than 10 degree, gain in strength so that root is thicker, the described left block (g51) of the described two auxiliary blow vents that narrow left and right block is provided with 4 reinforcement arm pawls (51e), and the square-section of each reinforcement arm pawl is thicker, and the minimum 2mm that is greater than of thinnest part, gains in strength so that cross section is thicker, near the back side of the two auxiliary blow vents (51b) in a left side that the described left block (51) of the described two auxiliary blow vents that narrow left and right block is provided with, be provided with long reinforcement (51c), narrow two larger local pressures caused by auxiliary blow vent to gain in strength to resist,Near the back side of the pit of the two auxiliary blow vents (51b) in a left side that the described left block (51) of the described two auxiliary blow vents that narrow left and right block is provided with, be provided with short reinforcement (51d), narrow two larger local pressures caused by auxiliary blow vent to gain in strength to resist; The two auxiliary blow vents (52b) in the right side that the described right block (g52) of the described two auxiliary blow vents that narrow left and right block is provided with are pits, it is identical with the two auxiliary blow vents (51b) in a left side that described left block (g51) is provided with for the length, width and height of its pit, to gain in strength, resist and narrow two larger local pressures caused by auxiliary blow vent; The two auxiliary blow vents (52b) in the right side that the described right block (g52) of the described two auxiliary blow vents that narrow left and right block is provided with are pits, the length, width and height of its pit are identical with the two auxiliary blow vents (51b) in a left side that described left block (g51) is provided with, length, width and height in 1E33 type are for being not more than 19x7x4.8mm, with the convenient local volumetric that narrows, strengthen local air flow pressure and flow velocity and additional turbulence is returned and altered and fall row; The not directly discharge of waste gas of engine, but indirectly discharge from the nearly tool bore (28a) of aluminum pipe after catalase hush tube by one meter five: described Low-emission gasoline brush cutter is characterized in that described cutter is containing beating the grass the moving head (54) of wire (54b) in order to long-acting cutting with cutting buttress, and the disc cutterbar (64) with inner sawtooth (642) is in case cutter relieving; With and the carburetor of engine establish four bifurcated nozzles (70a) in order to atomization; And described cutter is provided with interior protective cover (60) and outer protective cover (73) and is provided with its roller length on its outer protective cover and equals to beat the grass the long grass pressing wheel (74) of diameter so that press grass soil moisture conservation and meadow decorative pattern.

Certain technical solution is a kind of Low-emission gasoline mower, it is characterized in that: the moving head (54) contained by described cutter with to cut the buttress way that wire (54b) is provided with multiple its multiple sharp sword of sharp sword (54a) of beating the grass be cut to pile up neatly under hammering with sharp plain chisel on wire, its wire is round.

Certain technical solution is a kind of Low-emission gasoline mower, it is characterized in that: the moving head (54) contained by described cutter with buttress wire (54b) of beating the grass of cutting be provided with multiple sharp sword (54a), the way of its multiple sharp sword with there being the plunger chip die of sharp edge to cut to pile up neatly under the impact of stamping machine on wire, and its wire is flat.

Certain technical solution is a kind of Low-emission gasoline mower, it is characterized in that: the outer cutting edge (641) of the periphery of 4 cuttves stretched out that the disc cutterbar (64) of the inner sawtooth of the band contained by described cutter (642) is provided with is provided with multiple outer sawtooth (64a), and described inner sawtooth (642) also has 4, and the inner sawtooth of its every bar (642) establishes multiple sawtooth.

Certain technical solution is a kind of Low-emission gasoline mower, it is characterized in that: the outer protective cover (73) that the interior protective cover (60) that described cutter is equipped with is installed be provided with install draw-in groove (73b) and 2 screw hole positions (73a) in order to installation, and be provided with on its outer protective cover (73) spacing (73c) of rope of beating the grass, and the grass pressing wheel mounting bar (73d) be provided with on its outer protective cover (73) for installing long grass pressing wheel (74) and arc enclosing bar (73e).

Certain technical solution is a kind of Low-emission gasoline mower, it is characterized in that: it is rotating that its described roller grows the long grass pressing wheel (74) equaling to beat the grass diameter, the axial length of its grass pressing wheel and the long-range diameter being greater than its grass pressing wheel of roller, that is, the axial length of its grass pressing wheel and roller grow to 3 times of the diameter being its grass pressing wheel less; Described diameter of beating the grass refers to that spacing (73c) of the rope of beating the grass that described its outer protective cover (73) is provided with is radius of beating the grass to the distance of cutter rotary middle spindle, and its 2 times are described diameter of beating the grass; Long grass pressing wheel (74) its roller is long, and the diameter that equals to beat the grass then just in time can be pressed onto the grass just cut, or 1.2 times of the long diameter that equals to beat the grass of its roller.

Certain technical solution is a kind of Low-emission gasoline mower, it is characterized in that: it is rotating that its described roller grows the long grass pressing wheel (74) equaling to beat the grass diameter, the axial length of its grass pressing wheel and the long-range diameter being greater than its grass pressing wheel of roller, that is, the axial length of its grass pressing wheel and roller length are 10 times of the diameter of its grass pressing wheel, or more, so that the soil moisture conservation of pressure grass.

Certain technical solution is a kind of Low-emission gasoline mower, it is characterized in that: it is rotating and the axial length of its grass pressing wheel and the long-range diameter being greater than its grass pressing wheel of roller that its described roller grows the long grass pressing wheel (74) equaling to beat the grass diameter, that is, the axial length of its grass pressing wheel and roller length are 10 times of the diameter of its grass pressing wheel, or more, so that the soil moisture conservation of pressure grass.

Certain technical solution is a kind of Low-emission gasoline mower, it is characterized in that: its described roller is grown the long grass pressing wheel (74) equaling to beat the grass diameter and is provided with the careless groove of multiple pressure (74b), its groove is along its roller length direction or straight groove, or corrugated bending groove; And the slot cross-section (74a) of the careless groove of described pressure or square, or semicircular, and the careless groove of described multiple pressure is at least 2, so that the soil moisture conservation of pressure grass and meadow embossing and few skidding.

Certain technical solution is a kind of Low-emission gasoline mower, it is characterized in that: along establishing 4 gaps to be four bifurcated nozzles (70a) in ring week on the outlet that the gas control device of described gas engine establishes four bifurcated nozzles (70a) to refer to the nozzle (70) of the inside at gas control device, be beneficial to homogenize to improve combustion gas through the fluid state in gap.Namely be commonly called as in carburetor assembly (F56) at gas control device, improve the interior straight tube (70) of atomizer for having on the outlet of the vortex spray bar of helicla flute (71) also along establishing 4 gaps to be four bifurcated nozzles (70a) in ring week, or be 3 bifurcateds, or be 5 bifurcateds, or be six bifurcateds, or be 7 bifurcateds, or be eight bifurcateds, if 1 gap, or 2 gaps, then go out vapour irregular; If more than 9 gaps, because outlet is less than 3mm, then gap is too fine and closely woven.When combustion gas is poured described interior straight tube (70) through the interior straight tube (70) of improvement air nozzle in described gas control device assembly (F56) or the horn mouth that has the import of the vortex air jet pipe of helicla flute (71) to be set to the archimedes curve of parabolical horn mouth (72) or conical section and had the vortex air jet pipe of helicla flute (71), and then extrude along 4 gaps of establishing in ring week or 3-8 gap to multi-direction dispersion from the outlet of described air jet pipe again, instead of only extrude from a hole to a direction, again due on described outlet along multiple that are formed between ring week multiple gaps of establishing its to have the vibration of back and forth trembling because of cantilever beam principle and to the steam flow effect of adding fuel to the flames, will in the air-breathing moment of engine, at the aditus laryngis key position of this trunnion, accelerating fluid and the air-flow of coming from air filter sharply mixed hand over homogenize time and be more conducive to be polymerized mixed gas effect and disperse mixed effect, enter in the scavenging road junction (g45) of the left and right each of the symmetry of the cylinder body (g44) described in two-stroke machine with the combustion gas state of homogenize more, the wedge turbulent flow be provided with through each each ground, left and right symmetrically again returns alters sheet (g46) effect and enters the combustion chamber that the piston of two-stroke machine and cylinder formed and be beneficial to week and reciprocally work.Gas control device English is also commonly called as and is carburetor.The engine of mower is driven once to appoint fuel tank to contain miniature propane fuel tank (p20), fuel support (p21), fuel band (p22) with LPG described in it, the front portion of described miniature propane fuel tank (p20) is provided with gas thread (p20a), so that described fuel enters the engine of described driving mower by pipe joint through mixed airgun controller and works, the front portion of described miniature propane fuel tank (p20) be provided with safety valve (p20b) in case in excess of the quota time overflow and play safety effect, the rear portion of described miniature propane fuel tank (p20) is provided with tank base disk (p20c), and is provided with the base holes (p20d) of multiple equal distribution on described tank base disk (p20c), described fuel support (p21) is provided with pedestal (p21d), the rear portion of described pedestal (p21d) is provided with rear plate washer (p21b) to locate described tank base disk (p20c), the both sides of described pedestal (p21d) are respectively equipped with semicircular arc support (p21c), and the upper each ground, left and right of the semicircular arc support (p21c) be respectively equipped with in described both sides is provided with the rectangular frame of band (p21a) to connect described fuel band (p22), the semicircular arc bracket lip of the wherein side that described fuel support (p21) is provided with is provided with carriage mounting plate (p21g), and on described carriage mounting plate (p21g), be provided with installation through hole (p21e) and groove (p21f) be installed so that fixing, the main body of described fuel band (p22) is braid over braid, one end of described braid over braid is sewn together with the plastic with two oblong aperture (p22a), one section of described braid over braid is sewed the magic band (p22b) of multiple hard hook, and another section of described braid over braid then sews soft flannelette (p22c) to have the magic band (p22b) of multiple hard hook to match with described, described engine with miniature propane fuel tank (p20) lie on described fuel support (p21), and to be fastened by described fuel band (p22).

2. LPG gas engine according to claim 1 drives mower, it is characterized in that: described engine is closely-pitched to be tightly connected with the screw thread of the gas thread (p20a) that the front portion of miniature propane fuel tank (p20) is provided with.

3. LPG gas engine according to claim 1 drives mower, it is characterized in that: to be tightly connected when the screw thread of the gas thread (p20a) that described engine is provided with the front portion of miniature propane fuel tank (p20) is 3/4.

4. LPG gas engine according to claim 1 drives mower, it is characterized in that: described engine is that after heat treatment its hardness reaches 27.5HRC to be tightly connected with the screw thread of the gas thread (p20a) that the front portion of miniature propane fuel tank (p20) is provided with.

5. LPG gas engine according to claim 1 drives mower, it is characterized in that: the screw thread of the gas thread (p20a) that described engine is provided with the front portion of miniature propane fuel tank (p20) is that the volume fraction of after heat treatment its retained austenite scale of construction is less than 3% to be tightly connected.

6. LPG gas engine according to claim 1 drives mower, it is characterized in that: the end of the screw thread of the gas thread (p20a) that described engine is provided with the front portion of miniature propane fuel tank (p20) is provided with rubber seal to be tightly connected.

7. LPG gas engine according to claim 1 drives mower, it is characterized in that: the tank base disk (p20c) that the rear portion of described miniature propane fuel tank (p20) is provided with is provided with the base holes (p20d) of six equal distribution so that the rear plate washer (p21b) be provided with the rear portion of the pedestal (p21d) of described fuel support is located.

8. LPG gas engine according to claim 1 drives mower, it is characterized in that: the main inner profile curve that the both sides of described pedestal (p21d) are respectively equipped with semicircular arc support (p21c) is one section that equiangular spiral that pressure angle is equal everywhere is also called logatithmic spiral, also to have the near bag of multipoint pressure corner connection to embrace pressure when shake is trembled.

9. LPG gas engine according to claim 1 drives mower, it is characterized in that: be provided with screw thread to save a fixing nut in the installation through hole (p21e) that the carriage mounting plate (p21g) that the semicircular arc bracket lip of the wherein side on described fuel support (p21) is provided with is provided with, and the installation groove (p21f) that described carriage mounting plate (p21g) is provided with is bending groove also can locate when certain hold-doun nut drops.

10. LPG gas engine according to claim 1 drives mower, it is characterized in that: the main body of described fuel band (p22) is the wide braid over braid of 30mm, and one of described braid over braid section of magic band (p22b) having the 28mm of multiple hard hook wide of sewing, another section of described braid over braid then sews the wide soft flannelette of 29mm to have the magic band (p22b) of multiple hard hook to match with described, is also not grieved finger with the narrower magic band (p22b) of multiple hard hook.

The usefulness of Low-emission gasoline mower is: mower cutter is beneficial to long-acting cutting with wire for nylon wire containing with cutting the beat the grass moving head (54) of wire (54b) of buttress, and the disc cutterbar (64) with inner sawtooth (642) is beneficial to anti-cutter relieving, and four bifurcated nozzles (70a) established by the carburetor of its engine, or be 3 bifurcateds, or be 5 bifurcateds, or be six bifurcateds, or be 7 bifurcateds, or be eight bifurcateds, vapour pours described vortex air jet pipe from horn mouth, and then extrude along 4 gaps of establishing in ring week or 3-8 gap to multi-direction dispersion from the outlet of described spray bar again, instead of only extrude from a hole to a direction, again due on described outlet along multiple that are formed between ring week multiple gaps of establishing its to have the vibration of back and forth trembling because of cantilever beam principle and to the steam flow effect of adding fuel to the flames, will in the air-breathing moment of engine, at the aditus laryngis key position of this trunnion, accelerating fluid and the air-flow of coming from air filter sharply mixed hand over be atomized time and be more conducive to be polymerized contaminated product effect and disperse mixed effect, engine is entered with the carburetion state be more atomized, and described cutter is provided with the outer protective cover (73) that is contained on interior protective cover (60) and is provided with the long grass pressing wheel (74) of the long diameter that equals to beat the grass of its roller on its outer protective cover, it is convenient to press grass soil moisture conservation and meadow decorative pattern.The outer cutting edge (641) of the periphery of 4 cuttves stretched out that the disc cutterbar (64) of the inner sawtooth of the band contained by described cutter (642) is provided with is provided with multiple outer sawtooth (64a), and described inner sawtooth (642) also has 4, and the inner sawtooth of its every bar (642) establishes multiple sawtooth, drastically increase cutting and boldly confront a powerful opponent and allow motionless state of lancinating.

Accompanying drawing explanation

Below in conjunction with drawings and Examples, the present invention is further described.

Fig. 1 is the schematic diagram of mower.

Fig. 2 is the exploded perspective view of the first half of mower.

Fig. 3 is the exploded perspective view of the latter half of mower.

Fig. 4 is the schematic diagram removing outer cover and protective cover of mower.

Fig. 5 is the exploded perspective view of brush saw containing engine.

Fig. 6 is the generalized section of the carburetter body containing four bifurcated nozzles (70a) of brush mower engine.

Fig. 7 is the schematic perspective view of the carburetter body containing atomizer of brush mower engine and carburetor assembly (F56).

Fig. 8 is brush mower with the schematic perspective view of disc cutterbar having inner cutter hole (642) and outer cutting edge (641).

Fig. 9 is brush mower by the local schematic top plan view of disc cutterbar having inner cutter hole (642) and outer cutting edge (641).

Figure 10 is the schematic perspective view that outer protective cover is provided with the long grass pressing wheel (74) of the long diameter that equals to beat the grass of its roller.

Figure 11 is the schematic perspective view of the disc cutterbar of the belt length grass pressing wheel of brush mower.

Figure 12 is the stock of brush mower and the schematic perspective view being with the disc cutterbar of beating the grass.

Figure 13 is the schematic perspective view of the disc cutterbar that the band of brush mower is beaten the grass.

Figure 14 is the generalized section of piston.

Figure 15 is the schematic perspective view that band scavenging road junction wedge turbulent flow time alters that gasoline engine cylinder is rushed in two of sheet reduction discharge.

Figure 16 is the close-up schematic view that band scavenging road junction wedge turbulent flow time alters that gasoline engine cylinder is rushed in two of sheet reduction discharge.

Figure 17 is that the two auxiliary blow vent narrowing left and right block reduces the schematic diagram that the front of the left block of petrol engine is rushed in two of discharge.

Figure 18 is that the two auxiliary blow vent narrowing left and right block reduces the schematic diagram that the reverse side of the left block of petrol engine is rushed in two of discharge.

Figure 19 is two schematic perspective views rushing the installation site of petrol engine former left and right block.

Figure 20 is that the two auxiliary blow vent narrowing left and right block reduces the schematic diagram that the right block of petrol engine is rushed in two of discharge.

Figure 21 is that the two auxiliary blow vent narrowing left and right block reduces the schematic diagram that the two two auxiliary blow vents narrowed rushing petrolic left and right block discharged close on the piston adding two auxiliary shirt rim.

Figure 22 is that the two auxiliary blow vent narrowing left and right block reduces the midship section schematic diagram that the left block of petrol engine is rushed in two of discharge.

Figure 23. be the schematic perspective view at the rear portion of miniature propane fuel tank (p20).

Figure 24. be the schematic perspective view of the front portion of miniature propane fuel tank (p20).

Figure 25. be the schematic perspective view of the right part of fuel support (p21).

Figure 26. be the schematic perspective view of the left part of fuel support (p21).

Figure 27. be the schematic perspective view of fuel band (p22).

As shown in the figure, in figure:

P20. be have miniature propane fuel tank;

P20a. be gas thread;

P20b. be safety valve;

P20c. be tank base disk;

P20d. be base holes;

P21. be fuel support;

P21a. be the rectangular frame of band;

P21b. be rear plate washer;

P21c. be semicircular arc support;

P21d. be pedestal;

P21e. be that through hole is installed;

P21f. be that groove is installed;

P21g. be carriage mounting plate;

P22. be fuel band;

P22a. be oblong aperture;

P22b. be the magic band having multiple hard hook;

P22c. be soft flannelette;

1. are engine 1E34-48; 2. are hexagon socket cap head screw M6x30; 3. are hexagon socket cap head screw M5x8; 4. are 31 type hex nut M6; 5. are PP wire clamps; 6. are PA suspension ring; 7. are 41 type non-metallic insert hexagonal locking nut M5; 8. are POM suspension ring holders; 9. are hexagon socket cap head screw M5x20; 10. before being, connect aluminum pipe ; 11. is manipulating handgrip assemblies; 12. is control handle pipe; 13. is 13 band bullet pad hexagon socket cap head screw M5x25; 14. is that hand is holder train wheel bridge; 15. is that hand is holder; 16. is left hand handle components; 17. is that acrylonitrile-butadiene rubber hand is shock-absorbing sleeve; 18. is that hand is holder lower plate; 19. is left handle pipe; 20. is five leaf nylon tubes ; 21. is power transmission shafts ; 22. is deep groove ball bearings; 23. is bullet pads 6; 24. is hexagon socket cap head screw M6x23; 25. is aluminium tube joints; 26. is locking knobs; 27. is shaft adapters; 28. is rear aluminum pipes ; 29. is 4 hexagon socket cap head screw M5x12; 30. is 4 spring washers 5; 31. is spacing handle springs; 32. is spacing handle lock; 33. is spacing handles; 34. is split washers 2.5; 35. is protective cover holders; 36. is circlip for holes 26; 37. is circlips for shaft 10; 38. is small arc-shaped gears; 39. is that small arc-shaped gear oil blocks up; 40. is hexagon socket cap head screw M6x14; 41. is hexagon socket cap head screw M6x10; 42. is plain washers 6; 43. is gear-boxes; 44. is orthodrome gears; 45. is splined shafts; 46. is deep groove ball bearings 6002; 47. is circlip for holes 32; 48. is gear-box guard shields; 49. is spline pads; 50. is 3 tooth disc cutterbars; 51. is cutterhead pressing plates; 52. is cutterhead guard shields; 53. is that 1 type hex nut M10 is left-handed; 54. is nylon moving heads; 54a. is sharp sword; 54b. cuts buttress to beat the grass wire; 55. is braces; 56. is hexagon nut with flange M5; 57. is small blades; 58. is knife rests; 59. is cross recessed pan head tapping screw ST4x14; 60. is interior protective covers; 61. is shielding supports; 62. is hexagon socket cap head screw M5x35; 63. is 2 tooth disc cutterbars; 64. is disc cutterbars; 65. is 8 tooth disc cutterbars; 16-1. is left hand handle; 16-2. is 1 type hex-head nut M5; 16-3. is Cross Recess Head Screw M5x20; 16-4. is Cross Recess Head Screw M5x30; 66. is the waistbands having pallet; 67. is pallets; 68. is assist to turn ball; 69. is catalase hush tubes; 70. is interior straight tubes of atomizer; 70a. is four bifurcated nozzles; 71. is have spiral fluted vortex spray bar; 72. be atomizer have parabolical horn mouth; 73. is outer protective covers; 73a. is screw hole position; 73b. installs draw-in groove; 73c. is the spacing of rope of beating the grass; 73d. is grass pressing wheel mounting bar; 73e. is arc enclosing bar; 74. is long grass pressing wheels; 641. is outer cutting edges; 64a. is outer sawtooth; 642. is inner sawtooth; 74a. is the pressure grass slot cross-section of long roller grass pressing wheel; 74b. is the careless groove of multiple pressures of long roller grass pressing wheel; 19b. is damping adapter (19b) having close circle helical spring shape; F1. be starter assembly; F2. be start driver plate assembly; F3. be 2 oil sealings; F4. be right case; F5. be 2 deep groove ball bearings; F6. be hexagonal cylindrical head plain cushion screw assemblies M5 × 45 in 2 moment of torsion 7-9NM; F7. be the muffler ASSY of catalase hush tube (69); F8. be silencer pad; F9. be the right shock-reducing sleeve of fuel tank; F10. be 2 retaining ring for piston pins; F11. be piston pin; F12. be needle bearing; F14. be piston ring; F15. be crank assemblby; F16. be woodruff key; F17. be cylinder block pad; G44. be cylinder block; F19. be 2 interior hexagonal cylindrical head screw assemblies M5 × 20; F20. be engine outer cover; F21. be recessed pan head tapping screw ST5 × 14; F22. be igniter assembly; F23. be 2 cross fluting screw assemblies M4 × 20; F24. be spark plug; F25. be without asbestos packing sheet mould assembling pad; F26. be 2 mould assembling alignment pins; F27. be left box body; F28. be 5 cross fluting screw assemblies M5 × 25; F29. be magnetic flywheel; F30. be clutch assembly; F31. be clutch disk; F32. be circlip for shaft; F33. be the left shock-absorbing sleeve L (F33) of fuel tank; F34. be the right shock-absorbing sleeve R of fuel tank; F35. be inserts bearing connection seat; F36. be 3 cross fluting screw assemblies M5 × 20; F37. be train wheel bridge shock-absorbing sleeve; F38. be lower plate shock-absorbing sleeve; F39. be train wheel bridge; F40. be lower plate; F41. be 2 interior hexagonal cylindrical head screw assemblies M5 × 18; F42. be flame-out wire clamp; F43. be air filter seat; F44. be 2 air filter seat pad covers; F45. be soft polyurethane foam filter core; F46. be air filter pressing plate; F47. be 2 M5 bullet pads; F48. be 2 cross fluting coiled hair bullet screw M5 × 63; F49. be air filter lid; F50. be cross slotted panel head screw assemblies M5 × 14; F51. be 2 air inlet pipe pads; F52. be deflector; F53. be polyphenylene sulfide PPS air inlet pipe; F54. be grounding wire component; F55. be without asbestos packing sheet carburetor packing; F56. be carburetor assembly; F57. be PU yellow transparent oil return pipe; F58. be PU black oil inlet pipe; F59. be oil-resistant acrylonitrile-butadirubber rubber oil pipe seat; F60. be fuel filter assembly; F61. be oil pipe clip; F62. be HDPE blowing fuel tank; F63. be cap assembly of fuel tank; F64. be 5-7NM hexagon-headed bolt plain cushion combination M6X14; F65. be 4 3-5NM cross fluting screw assemblies M5X18; G31. be piston (g31); G37. be two auxiliary shirt rims (g37); G38 is the base (g38) of two auxiliary shirt rim; G39 is lower fillet (g39); G40. be the side (g40) of two auxiliary shirt rim; G41. be upper fillet (g41); G42. be the concave arc limit (g42) on base; G43. be the through hole (g43) of piston and two auxiliary shirt rim; G44. be cylinder body (g44); G45. be scavenging road junction (g45); G46. be that wedge turbulent flow time alters sheet (g46); G47. be that wedge turbulent flow goes back to the scavenging road junction (g47) of altering sheet; G48. be the wedge (g48) at logical scavenging road junction; G49. be wedge turbulent flow return alter the logical scavenging road junction of sheet return alter grid (g49); G50. be the turbulent shield (g50) at logical scavenging road junction; 51b. is left two auxiliary blow vent (51b); 52b. is right two auxiliary blow vent (52b).

Embodiment

For making up the phenomenon that caused by the existing mechanism of brush mower, mobile jib trace rocks, using the main aluminium bar of length of a kind of improvement for brush saw provided by the invention as in catalase hush tube loading machine, and use F41 screw fastening; Make waste gas by muffler ASSY and catalase hush tube 69, then by long main aluminium bar, and from the gap of close the cutter of aluminium boom end or the discharge of aperture gap.

According to customer requirement, the useful four-stroke engine of mower is as 139FA, and also useful two-stroke is as 1E34F.Power per liter more than 50% can be improved with two stroke engine relative to four-stroke engine, but will take measures in discharge; Mower is portable dam, wishes that power is gently little; If by four-stroke engine, exert oneself less; Former stock changes the hush tube of many honeycombs and catalase into, distally discharges; Its usefulness of brush saw having catalase hush tube and swirl sprayer and two to rush many scavenging ports engine is: change and originally hovered at engine environment by the waste gas put that runs in of the engine direct near people, portion can be sucked by engine and carburetor air inlet, and the situation that portion can be sucked by people, the method of indirectly discharging after catalase hush tube makes discharge low and floss hole is a little away from people, safer, and reduce discharging reinforcement; Transparent protective cover is had to be more convenient for observing, additionally provide the mode of operation of the new pallet waistband of brush saw, when expanding operating radius, in other words when running into large shrub, when reaching treetop, when maybe will cut at a distance and have puddle to stop, by lengthening mode engine being put into pallet waistband, cutterhead is extended, and this is easily more stable operation also.Having transparent protective cover, is on the protective cover of cutter, and local transparent or all transparent can be observed better and cut off and operate, and reduces jam.Have the bush knife of periphery blade and inner circumferential blade, what improve brush significantly allows branch and jam.Also have the stock interface not easily loosened of limit flange and lateral filament button, have the hand handle of spiral spring or wave spring and vibration damping, have the carburetor of inside spin whirlpool nozzle; Environmental protection quality and the usability of mower is improved with Low-emission gasoline machine and multinomial measure.Low-emission gasoline mower is characterized in that described cutter beats the grass the moving head 54 of wire 54b in order to long-acting cutting containing with cutting buttress, and the disc cutterbar 64 with inner sawtooth 642 is in case cutter relieving; And the carburetor of its engine establishes four bifurcated nozzle 70a in order to atomization; And described cutter is provided with interior protective cover 60 and outer protective cover 73 and on its outer protective cover, is provided with the long grass pressing wheel 74 of the long diameter that equals to beat the grass of its roller so that the soil moisture conservation of pressure grass and meadow decorative pattern, therefore its usefulness is many.

Moving head 54 contained by the cutter of Low-emission gasoline mower with the buttress wire 54b of beating the grass that cuts be provided with multiple sharp sword 154a, the way of its multiple sharp sword cuts to pile up neatly under hammering with sharp plain chisel on wire.Or, the moving head 54 contained by cutter with the buttress wire 54b of beating the grass that cuts be provided with multiple sharp sword 54a, the way of its multiple sharp sword with there being the plunger chip die of sharp edge to cut to pile up neatly under the impact of stamping machine on wire.Cut buttress wire of beating the grass more durable than nylon wire many, be not only beneficial to long-acting cutting, few with line, save into dish nylon wire; And can beat the grass, can also stalk be cut, and nylon wire cuts motionless thin bar; Beat the grass when cutting different object wire and disc cutterbar complement each other each has something to recommend him.The outer cutting edge 641 of the periphery of 4 cuttves stretched out that the disc cutterbar 64 of the inner sawtooth of the band contained by cutter 642 is provided with is provided with multiple outer sawtooth 64a, and described inner sawtooth 642 also has 4, and the inner sawtooth of its every bar 642 establishes multiple sawtooth, therefore handy.The outer protective cover 73 that the interior protective cover 60 that cutter is equipped with is installed is provided with installs draw-in groove 73b and 2 screw hole position 73a in order to installation, and on its outer protective cover 73, be provided with the spacing 73c of rope of beating the grass, and the grass pressing wheel mounting bar 73b be provided with on its outer protective cover 73 for installing long grass pressing wheel 74 and arc enclosing bar 73b, therefore be easy to install.It is rotating that its described roller grows the long grass pressing wheel 74 equaling to beat the grass diameter, the axial length of its grass pressing wheel and the long-range diameter being greater than its grass pressing wheel of roller, and that is, the axial length of its grass pressing wheel and roller grow to 3 times of the diameter being its grass pressing wheel less; Described diameter of beating the grass refers to that the spacing 73c of the rope of beating the grass that its described outer protective cover 73 is provided with is radius of beating the grass to the distance of cutter rotary middle spindle, and its 2 times are described diameter of beating the grass; Long its roller of grass pressing wheel 74 is long, and the diameter that equals to beat the grass then just in time can be pressed onto the grass just cut, therefore presses careless successful.It is rotating that its roller grows the long grass pressing wheel 74 equaling to beat the grass diameter, the axial length of its grass pressing wheel and the long-range diameter being greater than its grass pressing wheel of roller, that is, the axial length of its grass pressing wheel and roller length are 10 times of the diameter of its grass pressing wheel, both be convenient to press grass soil moisture conservation, material-saving again, and if be conducive to pressure grass because same distance wheel footpath of advancing comparatively carefully just can roll a few circle more.Wheel too slightly then takes material, and what also turn is excessively slow, and dash is few, rolls difference.Long being convenient to of roller covers face, and efficiency is high; So with the grass pressing wheel of thin length.Grow because of its described roller the long grass pressing wheel 74 equaling to beat the grass diameter again and be provided with the careless groove 74b of multiple pressure, its groove is along its roller length direction or straight groove, or corrugated bending groove; And the slot cross-section 74a of the careless groove of described pressure or square, or semicircular, therefore be convenient to press grass soil moisture conservation and meadow embossing and few skidding.

It is characterized in that: along establishing 4 gaps to be four bifurcated nozzles (70a) in ring week on the outlet that the gas control device of its described engine establishes four bifurcated nozzles (70a) to refer to the nozzle (70) of the inside at gas control device, be beneficial to homogenize to improve combustion gas through the fluid state in gap; Namely be commonly called as in carburetor assembly (F56) at gas control device, improve the interior straight tube (70) of atomizer for having on the outlet of the vortex spray bar of helicla flute (71) also along establishing 4 gaps to be four bifurcated nozzles (70a) in ring week, or be 3 bifurcateds, or be 5 bifurcateds, or be six bifurcateds, or be 7 bifurcateds, or be eight bifurcateds, if 1 gap, or 2 gaps, then go out vapour irregular; If more than 9 gaps, because outlet is less than 3mm, then gap is too fine and closely woven; when combustion gas is poured described interior straight tube (70) through the interior straight tube (70) of improvement air nozzle in described gas control device assembly (F56) or the horn mouth that has the import of the vortex air jet pipe of helicla flute (71) to be set to the archimedes curve of parabolical horn mouth (72) or conical section and had the vortex air jet pipe of helicla flute (71), and then extrude along 4 gaps of establishing in ring week or 3-8 gap to multi-direction dispersion from the outlet of described air jet pipe again, instead of only extrude from a hole to a direction, again due on described outlet along multiple that are formed between ring week multiple gaps of establishing its to have the vibration of back and forth trembling because of cantilever beam principle and to the steam flow effect of adding fuel to the flames, will in the air-breathing moment of engine, at the aditus laryngis key position of this trunnion, accelerating fluid and the air-flow of coming from air filter sharply mixed hand over homogenize time and be more conducive to be polymerized mixed gas effect and disperse mixed effect, enter in the scavenging road junction (g45) of the left and right each of the symmetry of the cylinder body (g44) described in engine with the combustion gas state of homogenize more, the wedge turbulent flow be provided with through each each ground, left and right symmetrically again returns alters sheet (g46) effect and enters the combustion chamber that the piston of engine and cylinder formed and be beneficial to week and reciprocally work.Gas control device English is still commonly called as and is carburetor, the engine of mower is driven once to appoint fuel tank to contain miniature propane fuel tank (p20), fuel support (p21), fuel band (p22) with LPG described in it, the front portion of described miniature propane fuel tank (p20) is provided with gas thread (p20a), so that described fuel enters the engine of described driving mower by pipe joint through mixed airgun controller and works, the front portion of described miniature propane fuel tank (p20) be provided with safety valve (p20b) in case in excess of the quota time overflow and play safety effect, the rear portion of described miniature propane fuel tank (p20) is provided with tank base disk (p20c), and is provided with the base holes (p20d) of multiple equal distribution on described tank base disk (p20c), described fuel support (p21) is provided with pedestal (p21d), the rear portion of described pedestal (p21d) is provided with rear plate washer (p21b) to locate described tank base disk (p20c), the both sides of described pedestal (p21d) are respectively equipped with semicircular arc support (p21c), and the upper each ground, left and right of the semicircular arc support (p21c) be respectively equipped with in described both sides is provided with the rectangular frame of band (p21a) to connect described fuel band (p22), the semicircular arc bracket lip of the wherein side that described fuel support (p21) is provided with is provided with carriage mounting plate (p21g), and on described carriage mounting plate (p21g), be provided with installation through hole (p21e) and groove (p21f) be installed so that fixing, the main body of described fuel band (p22) is braid over braid, one end of described braid over braid is sewn together with the plastic with two oblong aperture (p22a), one section of described braid over braid is sewed the magic band (p22b) of multiple hard hook, and another section of described braid over braid then sews soft flannelette (p22c) to have the magic band (p22b) of multiple hard hook to match with described, described engine with miniature propane fuel tank (p20) lie on described fuel support (p21), and to be fastened by described fuel band (p22).Described engine is closely-pitched to be tightly connected with the screw thread of the gas thread (p20a) that the front portion of miniature propane fuel tank (p20) is provided with.To be tightly connected when the screw thread of the gas thread (p20a) that described engine is provided with the front portion of miniature propane fuel tank (p20) is 3/4.Described engine is that after heat treatment its hardness reaches 27.5HRC to be tightly connected with the screw thread of the gas thread (p20a) that the front portion of miniature propane fuel tank (p20) is provided with.The screw thread of the gas thread (p20a) that described engine is provided with the front portion of miniature propane fuel tank (p20) is that the volume fraction of after heat treatment its retained austenite scale of construction is less than 3% to be tightly connected.The end of the screw thread of the gas thread (p20a) that described engine is provided with the front portion of miniature propane fuel tank (p20) is provided with rubber seal to be tightly connected.The tank base disk (p20c) that the rear portion of described miniature propane fuel tank (p20) is provided with is provided with the base holes (p20d) of six equal distribution so that the rear plate washer (p21b) be provided with the rear portion of the pedestal (p21d) of described fuel support is located.The main inner profile curve that the both sides of described pedestal (p21d) are respectively equipped with semicircular arc support (p21c) is one section that equiangular spiral that pressure angle is equal everywhere is also called logatithmic spiral, also to have the near bag of multipoint pressure corner connection to embrace pressure when shake is trembled.Be provided with screw thread to save a fixing nut in the installation through hole (p21e) that the carriage mounting plate (p21g) that the semicircular arc bracket lip of the wherein side on described fuel support (p21) is provided with is provided with, and the installation groove (p21f) that described carriage mounting plate (p21g) is provided with is bending groove also can locate when certain hold-doun nut drops.The main body of described fuel band (p22) is the wide braid over braid of 30mm, and one of described braid over braid section of magic band (p22b) having the 28mm of multiple hard hook wide of sewing, another section of described braid over braid then sews the wide soft flannelette of 29mm to have the magic band (p22b) of multiple hard hook to match with described, is also not grieved finger with the narrower magic band (p22b) of multiple hard hook.LPG gas engine drives mower energy-saving and environmental protecting.The propane degree of described miniature propane fuel tank is up to 99%, and impurity is few.Described miniature propane fuel tank high pressure extrusion/moulding.Safety and environmental protection easily exchanges and multi-country universal, therefore welcomes by international market.

Claims (10)

1.LPG gas engine-driven grass-mowing machine, containing the air-cooled petrol engine of two-stroke single cylinder, stock, cutter, manipulating handgrip assembly, described stock is provided with aluminum pipe, described aluminum pipe inside is provided with cavity, power transmission shaft is provided with in the cavity of described aluminum pipe, its upper end of described aluminum pipe and power transmission shaft is equiped with described engine, and its lower end of described aluminum pipe and power transmission shaft is equiped with described cutter, and the middle part of described aluminum pipe is equiped with described hand handle; It contains only 1 type hex nut M6 (4), PP wire clamp (5), only 1 type non-metallic insert hexagonal locking nut M5 (7), POM suspension ring holder (8), hexagon socket cap head screw M5x20 (9), the front aluminum pipe that connects of PA suspension ring (6), 4 of engine 1E34-48 (1), hexagon socket cap head screw M6x30 (2), hexagon socket cap head screw M5x8 (3), 3 described Low-emission gasoline brush cutter (10), manipulating handgrip assembly (11), control handle pipe (12), 13 only band bullet pad hexagon socket cap head screw M5x25 (13), hand holder train wheel bridge (14), hand holder (15), left hand handle component (16), acrylonitrile-butadiene rubber hand shock-absorbing sleeve (17), hand holder lower plate (18), left handle pipe (19), five leaf nylon tubes (20), power transmission shaft (21), deep groove ball bearing (22), bullet pad 6 (23), hexagon socket cap head screw M6x23 (24), aluminium tube joint (25), locking knob (26), shaft adapter (27),Rear aluminum pipe (28), 4 hexagon socket cap head screw M5x12 (29), 4 spring washers 5 (30), spacing handle spring (31), spacing handle lock (32), spacing handle (33), split washer 2.5 (34), protective cover holder (35), circlip for hole 26 (36), circlip for shaft 10 (37), small arc-shaped gear (38), small arc-shaped gear oil blocks up (39), hexagon socket cap head screw M6x14 (40), hexagon socket cap head screw M6x10 (41), plain washer 6 (42), gear-box (43), orthodrome gear (44), splined shaft (45), deep groove ball bearing 6002 (46), circlip for hole 32 (47), gear-box guard shield (48), spline pad (49), 3 tooth disc cutterbars (50), cutterhead pressing plate (51), cutterhead guard shield (52), 1 type hex nut M10 left-handed (53), nylon moving head (54), braces (55), hexagon nut with flange M5 (56), small blade (57), knife rest (58), cross recessed pan head tapping screw ST4x14 (59), protective cover A (60), shielding support (61), hexagon socket cap head screw M5x35 (62), 2 tooth disc cutterbars (63), 4 tooth disc cutterbars (64), 8 tooth disc cutterbars (65), left hand is (16-1), 1 type hex-head nut M5 (16-2), Cross Recess Head Screw M5x20 (16-3), Cross Recess Head Screw M5x30 (16-4), there is the waistband (66) of pallet (67), the auxiliary ball (68) that turns, catalase hush tube (69), described engine, or with little to 1E32F, or with greatly to 1E48F, it comprises starter assembly (F1), start driver plate assembly (F2), 2 oil sealings (F3), right case (F4), 2 deep groove ball bearings (F5), hexagonal cylindrical head plain cushion screw assemblies M5 × 45 (F6) in 2 moment of torsion 7-9NM, the muffler ASSY (F7) of catalase hush tube (69), silencer pad (F8), the right shock-reducing sleeve of fuel tank (F9), 2 retaining ring for piston pins (F10), piston pin (F11), needle bearing (F12), piston (F13), piston ring (F14), crank assemblby (F15), woodruff key (F16), cylinder block pad (F17), cylinder block (F18), hexagonal cylindrical head screw assemblies M5 × 20 (F19) in 2, engine outer cover (F20), recessed pan head tapping screw ST5 × 14 (F21), igniter assembly (F22),2 cross fluting screw assemblies M4 × 20 (F23), spark plug (F24), without asbestos packing sheet mould assembling pad (F25), 2 mould assembling alignment pins (F26), left box body (F27), 5 cross fluting screw assemblies M5 × 25 (F28), magnetic flywheel (F29), clutch assembly (F30), clutch disk (F31), circlip for shaft (F32), the left shock-absorbing sleeve L of fuel tank (F33), the right shock-absorbing sleeve R of fuel tank (F34), inserts bearing connection seat (F35), 3 cross fluting screw assemblies M5 × 20 (F36), train wheel bridge shock-absorbing sleeve (F37), lower plate shock-absorbing sleeve (F38), train wheel bridge (F39), lower plate (F40), hexagonal cylindrical head screw assemblies M5 × 18 (F41) in 2, flame-out wire clamp (F42), air filter seat (F43), 2 air filter seat pad covers (F44), soft polyurethane foam filter core (F45), air filter pressing plate (F46), 2 M5 bullet pads (F47), 2 cross fluting coiled hair bullet screw M5 × 63 (F48), air filter lid (F49), cross slotted panel head screw assemblies M5 × 14 (F50), 2 air inlet pipe pads (F51), deflector (F52), polyphenylene sulfide PPS air inlet pipe (F53), grounding wire component (F54), without asbestos packing sheet carburetor packing (F55), carburetor assembly (F56), PU yellow transparent oil return pipe (F57), PU black oil inlet pipe (F58), oil-resistant acrylonitrile-butadirubber rubber oil pipe seat (F59), fuel filter assembly (F60), oil pipe clip (F61), HDPE blowing fuel tank (F62), cap assembly of fuel tank (F63), 5-7NM hexagon-headed bolt plain cushion combination M6X14 (F64), 4 3-5NM cross fluting screw assemblies M5X18 (F65), its engine 1E34-48 (1) comprising of described gasoline brush cutter, by described hexagon socket cap head screw M6x30 (2), hexagon socket cap head screw M5x8 (3), and 31 type hex nut M6 (4) only, with described before connect aluminum pipe (10) and be connected, the outside of the pipe of aluminum pipe (10) is connect before described, by only 1 type non-metallic insert hexagonal locking nut M5 (7), POM suspension ring holder (8), hexagon socket cap head screw M5x20 (9) form harness portion with braces (55) of described PP wire clamp (5), PA suspension ring (6), 4, to braces is worn on single shoulder, the aluminum pipe connecing before described (10) upper, be equiped with manipulating handgrip assembly (11),By control handle pipe (12), many band bullet pad hexagon socket cap head screw M5x25 (13), hand, holder train wheel bridge (14), hand are formed shock-absorbing sleeve (17), hand holder (15), left hand handle component (16), acrylonitrile-butadiene rubber hand holder lower plate (18), left handle pipe (19) jointly; Before described, connect the inside of the pipe of aluminum pipe (10), be equiped with five described leaf nylon tubes (20), power transmission shaft (21) and deep groove ball bearing (22) so that transmission; Before described, connect aluminum pipe (10) by described bullet pad 6 (23), hexagon socket cap head screw M6x23 (24), aluminium tube joint (25), locking knob (26), shaft adapter (27), with described rear aluminum pipe (28) connection, and formed spacing Handleset by 4 hexagon socket cap head screw M5x12 (29), 4 spring washers 5 (30), spacing handle spring (31), spacing handle lock (32), spacing handle (33), split washers 2.5 (34); In the end of described rear aluminum pipe (28), be equiped with described protective cover holder (35), circlip for hole 26 (36), circlip for shaft 10 (37), small arc-shaped gear (38), small arc-shaped gear oil stifled (39) and many band bullet pad hexagon socket cap head screw M5x25 (13), hexagon socket cap head screw M6x14 (40), hexagon socket cap head screw M6x10 (41), plain washer 6 (42) and gear-box (43), orthodrome gear (44), splined shaft (45),Deep groove ball bearing 6002 (46), circlip for hole 32 (47), gear-box guard shield (48), spline pad (49), 3 tooth disc cutterbars (50), cutterhead pressing plate (51), cutterhead guard shield (52); Described cutter contains protective cover and moving head and disc cutterbar to select; 1 described type hex nut M10 left-handed (53) of dress cutterhead; Or dress nylon moving head (54) is to replace disc cutterbar, and the described small blade (57) of line that cut-out is beaten the grass, be contained in described protective cover A (60) by hexagon nut with flange M5 (56), knife rest (58), cross recessed pan head tapping screw ST4x14 (59) upper, and shielding support (61) and hexagon socket cap head screw M5x35 (62) will be installed; Cutterhead can multiselect, or 2 tooth disc cutterbars (63), or 4 tooth disc cutterbars (64), or 8 tooth disc cutterbars (65), so that the shrub of different cultivars is cut in choosing; Described left hand handle component (16), by left hand, (16-1), 1 type hex-head nut M5 (16-2), Cross Recess Head Screw M5x20 (16-3), Cross Recess Head Screw M5x30 (16-4) are formed, be arranged in left handle pipe (19); And there is the waistband (66) of pallet (67), people waist can be tied up to, pallet (67) and auxiliary ball (68) movable contact that turns, auxiliaryly turn ball (68) and be connected with engine outer cover (F20), to lengthen cut coverage further; Described catalase hush tube (69), connects the gas outlet of muffler ASSY (F7), so that waste gas is discharged near cutter through aluminum pipe; Described engine, or with 1E30, or greatly to 48 cylinder diameter; Engine start part comprises starter assembly (F1), starts driver plate assembly (F2), is furnished with 2 oil sealings (F3) and 2 deep groove ball bearings (F5), to be contained in rotationally on the described right case (F4) of engine; By hexagonal cylindrical head plain cushion screw assemblies M5 × 45 (F6) in 2 moment of torsion 7-9NM, the muffler ASSY of catalase hush tube (69) (F7) and silencer pad (F8), be fixed on cylinder block (F18); The right shock-reducing sleeve of fuel tank (F9) cylinder block (F18) is equipped with; Built with 2 retaining ring for piston pins (F10), piston pin (F11), needle bearing (F12), piston (F13), piston ring (F14) and crank assemblby (F15), bent axle is established woodruff key (F16) at cylinder block (F18); Cylinder block pad (F17) is mounted on cylinder block (F18); 2 interior hexagonal cylindrical head screw assemblies M5 × 20 (F19) and recessed pan head tapping screw ST5 × 14 (F21) are fixed on engine outer cover (F20) on cylinder block (F18); Igniter assembly (F22) is fixing by 2 crosses screw assemblies M4 × 20 (F23) of slotting; Spark plug (F24) is also contained on cylinder block (F18); Cylinder block (F18) is put without asbestos packing sheet mould assembling pad (F25), 2 mould assembling alignment pins (F26),And fix left box body (F27) with 5 cross fluting screw assemblies M5 × 25 (F28); Magnetic flywheel (F29) is contained on bent axle, and matches with clutch assembly (F30), clutch disk (F31) and circlip for shaft (F32); The right shock-absorbing sleeve R of the left shock-absorbing sleeve L of fuel tank (F33) and fuel tank (F34) is contained on described outer cover (20); Inserts bearing connection seat (F35) is fixed by 3 crosses screw assemblies M5 × 20 (F36) of slotting; Described connection seat (F35) is equipped with train wheel bridge shock-absorbing sleeve (F37), lower plate shock-absorbing sleeve (F38) and train wheel bridge (F39) lower plate (F40), and clamps with hexagonal cylindrical head screw assemblies M5 × 18 (F41) in 2; Flame-out wire clamp (F42) described connection seat (F35) is also equipped with; Air filter seat (F43), 2 air filter seat pad covers (F44), soft polyurethane foam filter core (F45), air filter pressing plate (F46) are formed air filter by 2 M5 bullet pads (F47) and 2 cross fluting coiled hair bullet screw M5 × 63 (F48) air filter lids (F49), cross slotted panel head screw assemblies M5 × 14 (F50), and are packed on carburetor; 2 air inlet pipe pads (F51), deflector (F52), polyphenylene sulfide PPS air inlet pipe (F53), grounding wire component (F54), without asbestos packing sheet carburetor packing (F55), carburetor assembly (F56) composition carburetor; PU yellow transparent oil return pipe (F57), PU black oil inlet pipe (F58), oil-resistant acrylonitrile-butadirubber rubber oil pipe seat (F59), fuel filter assembly (F60), oil pipe clip (F61), HDPE blowing fuel tank (F62), cap assembly of fuel tank (F63) composition fuel tank; And 5-7NM hexagon-headed bolt plain cushion combination M6X14 (F64) is fixing described startup driver plate assembly (F2), as 4 3-5NM crosses fluting screw assemblies M5X18 (F65) be fixing described starter assembly (F1); The described waistband that has pallet (67) (66) is provided with pallet (67), pallet (67) can be placed the auxiliary ball (68) that turns, and auxiliary turn ball (68) and be contained in external engine, or directly brush cutter engine is placed on the operation that comes up of pallet (67) that waistband (66) is provided with; Pallet (67) and auxiliary ball (68) movable contact that turns, auxiliaryly turn ball (68) and be connected with engine outer cover (F20), to lengthen cut coverage further; Described catalase hush tube (69), one termination is led to the gas outlet of muffler ASSY (F7), and its another termination aluminum pipe so that waste gas is through described aluminum pipe, and is discharged near cutter; Described catalase hush tube (69) is aluminum, has waste gas by there is aluminium dioxide catalyst effect; Described muffler ASSY (F7) is aluminum, has waste gas by there is aluminium dioxide catalyst effect; Before described, connect aluminum pipe (10) and rear aluminum pipe (28) or separate, or an aluminum pipe, having waste gas by there is aluminium dioxide catalyst effect;Five leaf nylon tubes in described aluminum pipe are established foam honeycomb body, and add catalase catalyst at foam honeycomb body, so as to have waste gas by time have a catalyst multiple catalyzing effect; 2 described tooth disc cutterbars (63), 4 tooth disc cutterbars (64), 8 tooth disc cutterbars (65) are for selecting, be commonly referred to as the disc cutterbar of cutter, it is provided with multiple outer cutting edges (641) in cutterhead periphery, so that the few cutter relieving of brush; Described 2 tooth disc cutterbars (63), 4 tooth disc cutterbars (64), 8 tooth disc cutterbars (65) supply to select, and it is provided with multiple inner cutter holes (642) in cutterhead periphery, so that card branch in brush; In described carburetor assembly (F56), improve the interior straight tube (70) of atomizer for there being the vortex spray bar of helicla flute (71), be beneficial to disperse mixed effect; In described carburetor assembly (F56), the import of the interior straight tube (70) that improves atomizer or the vortex spray bar that has helicla flute (71) is for there being parabolical horn mouth (72), or the horn mouth of conical section as archimedes curve, is beneficial to polymerization contaminated product effect; Upper in described left handle pipe (19), be provided with the damping adapter (19b) of close circle helical spring shape, so that damping further; Adopt and have the protective cover (60) of transparent or partially transparent, in order to convenient observation brush operation; The single-cylinder air-cooled petrol engine of small two-stroke that this brush cutter adopts, little of 1E32, greatly to 1E47.5, multiplex 1E34F or 1E39F; Belong to the engine of low emission, in the combustion chamber that has function wave of the improvement of internal combustion engine and with on the basis of the collocation of the internal combustion engine ignition device that has active receiving electrode and fine motion discharge electrode, and on the petrolic basis of Jia Shuanfu shirt rim, piston skirt reduction hydrocarbon emission, and return alter on the petrol engine basis that falls row at logarithmic differentiation isogonal line shirt rim, improved piston skirt turbulent flow, the further improved two auxiliary blow vent that narrows left and right block reduces two of discharge and rushes petrol engine; In Jia Shuanfu shirt rim, piston skirt, unexpectedly have and reduce discharging effect up to standard; Logarithmic differentiation isogonal line shirt rim, piston skirt turbulent flow returns and alters the petrol engine that falls row is to be equipped with two auxiliary shirt rims (g37) in the skirt section of piston (g31); Described two auxiliary shirt rim (g37) is on the basis of former two shirt rims of the bilateral that there is not connecting rod pin-and-hole that retains original piston, and the bilateral that has connecting rod pin-and-hole in the skirt section of piston (g31) is following, an auxiliary shirt rim is added on every one side, can be described as two auxiliary shirt rims (g37); Described two auxiliary shirt rim, it is containing the through hole (g43) of concave arc limit (g42), piston and two auxiliary shirt rims on base (g38), lower fillet (g39), side (g40), upper fillet (g41), base, isogonal one section of piston skirt logarithmic differentiation equation is located at shirt rim, it is conducive to auxiliary guiding, additional turbulence is returned and is altered and fall row, and lubrication assistant and heat radiation; Described two auxiliary shirt rim or with aluminium alloy, or with composite to reduce cylinder prepareding gap; Each auxiliary shirt rim of described two auxiliary shirt rim (g37) and described former two shirt rims are all the cylindrical prolongations along outside piston week,And its projection is thrown on the face vertical with piston movement direction along the outside piston week quartering, each auxiliary shirt rim of described two auxiliary shirt rim (g37) than described former two shirt rims along the cylinder in outside piston week extend longer, that is, the base (g38) of two auxiliary shirt rims is more farther than base distance connecting rod pin-and-hole on the direction of the cylinder extended line along piston of former two shirt rims, namely two auxiliary shirt rims are higher, piston and skirt section are longer, and its effect is to be conducive to the guiding length of lengthened piston and auxiliary guiding, the both sides of described two auxiliary shirt rim (g37) are provided with the side (g40) of two auxiliary shirt rims, the base (g38) of its connection piston (31) and two auxiliary shirt rims, the both sides of described two auxiliary shirt rim (g37), be provided with the side (g40) of two auxiliary shirt rims on the base (g38) of connection piston (31) and two auxiliary shirt rims, the angle of the side (g40) of its both sides is greater than 100 degree, the both sides of described two auxiliary shirt rim (37) are provided with the side (g40) of two auxiliary shirt rims, and it is to be connected piston (g31) by the upper fillet (g41) of the side of two auxiliary shirt rims, the both sides of described two auxiliary shirt rim (g37) are provided with the side (g40) of two auxiliary shirt rims, and it is the base (g38) that lower fillet (g39) by the side of two auxiliary shirt rims connects two auxiliary shirt rims, concave arc limit (g42) is established on the base of described two auxiliary shirt rim (g37), described concave arc limit (g42) or circular arc, or involute, or parabola, or other functions, fall row in order to assisting, through hole (g43) is established in described two auxiliary shirt rim (g37), or pit, in order to lubrication assistant and heat radiation, upper and the piston in described two auxiliary shirt rim (g37) is provided with multiple through holes (g43), and it slightly arranges in del, and have many rows, the most descending through hole is few, and the Kong Yue that more up works is many, in order to lubrication assistant and heat radiation, cylinder body (g44) is two cylinder bodies (g44) that rush the scavenging road junction (g45) of centrally containing around each one on the petrolic cylinder chamber at dress piston symmetrically, on the scavenging road junction of the symmetrical left and right of described cylinder body (g44) each (g45), respectively each ground, left and right is provided with wedge turbulent flow time and alters sheet (g46) symmetrically, utilize the feature that the logatithmic spiral tool pressure angle of higher mathematics is equal, described sheet is made to have a section of the logatithmic spiral by logarithmic differentiation equation, then gush mixed air-flow thereon just easily steadily, block waste gas and return in order to utilize equal pressure angle to produce turbulent flow at scavenging road junction place and alter to reduce discharge, described wedge turbulent flow goes back to the side of the outlet of the scavenging air belt of pressing close to piston that closes on lower dead center of the bottom of the bottom of altering the scavenging road junction (g45) that sheet (g46) is located at cylinder body, a section of its tool logatithmic spiral, described wedge turbulent flow return alter that sheet (46) comprises that wedge turbulent flow returns that the scavenging road junction (g47) of altering sheet, wedge (g48), wedge turbulent flow that wedge turbulent flow goes back to the logical scavenging road junction of altering sheet go back to the logical scavenging road junction of altering sheet return the turbulent shield (g50) of altering grid (g49), wedge turbulent flow and going back to the logical scavenging road junction of altering sheet, all sections of tool logatithmic spiral, described wedge turbulent flow returns alters sheet (g46) slightly in inclined wedge-shaped,The large end of described inclined wedge-shaped is connected to the side of the outlet of the scavenging air belt of pressing close to piston that closes on lower dead center of the bottom of the bottom at the scavenging road junction (g45) of cylinder body, a section of its tool logatithmic spiral, described wedge turbulent flow returns alters wedge turbulent flow that sheet (g46) comprises and goes back to the scavenging road junction (g47) of altering sheet and be located at described wedge turbulent flow and go back to the top of altering sheet (46), that is returns a section of its tool logatithmic spiral of small end of the inclined wedge-shaped of altering sheet (g46) at wedge turbulent flow, described wedge turbulent flow returns alters wedge (g48) that described wedge turbulent flow that sheet (g46) comprises goes back to the logical scavenging road junction of altering sheet and is located at wedge turbulent flow and returns the inner side of altering sheet (g46) and the bottom connection with the bottom at the scavenging road junction (g45) of cylinder body, a section of its tool logatithmic spiral of described inner side, described wedge turbulent flow goes back to the intersection of going back to the side of altering the outlet that grid (g49) are located at the scavenging air belt that wedge turbulent flow goes back to the scavenging road junction (g45) of altering sheet and cylinder body of altering described wedge turbulent flow that sheet (46) comprises and go back to the logical scavenging road junction of altering sheet, a section of its tool logatithmic spiral, described wedge turbulent flow goes back to the chamfering place of going back to the side of altering the outlet that grid (g49) are located at the scavenging air belt that wedge turbulent flow goes back to the scavenging road junction (g45) of altering sheet and cylinder body of altering described wedge turbulent flow that sheet (46) comprises and go back to the logical scavenging road junction of altering sheet, a section of its tool logatithmic spiral, described wedge turbulent flow goes back to the rounding place of going back to the side of altering the outlet that grid (g49) are located at the scavenging air belt that wedge turbulent flow goes back to the scavenging road junction (g45) of altering sheet and cylinder body of altering described wedge turbulent flow that sheet (46) comprises and go back to the logical scavenging road junction of altering sheet, a section of its tool logatithmic spiral, described wedge turbulent flow returns the turbulent shield (g50) that is provided with the logical scavenging road junction that wedge turbulent flow go back to is altered sheet above of altering sheet (g46), its one end be located at wedge turbulent flow and go back to the chamfering place of altering sheet crossing with the side of the outlet of the scavenging air belt at the scavenging road junction (g45) of cylinder body and be connected, and its other end and wedge turbulent flow time are altered the small end of that is top of sheet alters sheet (g46) for turbulent time inclined wedge-shaped with wedge and are connected, and a section of its tool logatithmic spiral above of described turbulent shield, the two auxiliary blow vent that narrows left and right block reduces two of discharge and rushes petrol engine, containing left block, right block, piston, and known combustion chamber, spark plug, cylinder body, cylinder cap, cylinder barrel, connecting rod, crankcase, lubricating oil pump, lubricating system, fuel system, ignition system, cooling system, described cylinder body (g44) is two cylinder bodies (44) that rush the scavenging road junction (g45) of centrally containing around each one on the petrolic cylinder chamber at dress piston symmetrically, on the scavenging road junction of the symmetrical left and right of described cylinder body (g44) each (g45), respectively each ground, left and right is provided with wedge turbulent flow time and alters sheet (g46) symmetrically, the skirt section of described piston is equipped with two auxiliary shirt rims (g37), described two auxiliary shirt rim (g37) is on the basis of former two shirt rims of the bilateral that there is not connecting rod pin-and-hole that retains original piston, and the bilateral that has connecting rod pin-and-hole in the skirt section of piston (g31) is following, an auxiliary shirt rim is added on every one side, can be described as two auxiliary shirt rims (g37), described two auxiliary shirt rim,It is containing base (g38), lower fillet (g39), side (g40), upper fillet (g41), the concave arc limit (g42) on base, the through hole (g43) of piston and two auxiliary shirt rims, the logarithm line of its piston skirt logarithmic differentiation equation of described piston also claims that isogonal one section is located at shirt rim, the limit of the part of its shirt rim is a section that pressure angle approaches the equal logatithmic spiral by logarithmic differentiation equation, utilize the feature that the logatithmic spiral tool pressure angle of higher mathematics is equal, make sheet have one section of logatithmic spiral to block waste gas and return in order to utilize equal pressure angle to produce turbulent flow at scavenging road junction place and alter to reduce discharge, described two auxiliary shirt rim or with aluminium alloy, or with composite to reduce cylinder prepareding gap, use CNC machining center, tungsten copper electrode first be made, with the auxiliary molding of the lathe that has three-dimensional rotation head, then produce in batches with die casting machine, machined and plating again, described left block and its left block of right block and right block are respectively provided with and change the little two auxiliary blow vent narrowing, described two auxiliary blow vent is located at left block and is just called left two auxiliary blow vent (51b), described two auxiliary blow vent is located at right block and is just called right two auxiliary blow vent (52b), described left block and right block are to assemble Face to face, and with being connected above of the scavenging air belt of cylinder body, the right side pair auxiliary blow vents (52b) that the two auxiliary blow vents (51b) in a left side that two scavenging air belts of described cylinder body are provided with described left block (51) respectively and described right block (g52) are provided with are connected, it is the two auxiliary blow vent of the left and right block that narrows, when the two auxiliary shirt rim (g37) being equipped with when described two auxiliary blow vent and the skirt section of described piston that runs to piston lower approaches, just be beneficial to and narrow local volumetric, strengthen local air flow pressure and flow velocity and additional turbulence is returned and altered and fall row, the wedge turbulent flow that upper each each ground, left and right symmetrically, scavenging road junction (g45) of the symmetrical left and right each of the described two auxiliary blow vent that narrows left and right block and described cylinder body (g44) is provided with returns alters both adapteds of sheet (g46), has the row's of falling effect, both adapteds of two auxiliary shirt rim (g37) that the skirt section of the described two auxiliary blow vent that narrows left and right block and described piston is equipped with, have the row's of falling effect, the described two auxiliary blow vent that narrows left and right block, the wedge turbulent flow being provided with upper each each ground, left and right symmetrically, scavenging road junction (g45) of the symmetrical left and right each of described cylinder body (g44) returns alters sheet (g46), and with two auxiliary shirt rim (g37) three's adapted that the skirt section of described piston is equipped with, have more to fall row's effect, the rear wall (51f) of the two auxiliary blow vents (51b) in a left side that the described left block (g51) of the described two auxiliary blow vents that narrow left and right block is provided with is thicker, the minimum 2mm that is greater than of thinnest part, and there is the oblique angle that is greater than 10 degree, gain in strength so that root is thicker, the described left block (g51) of the described two auxiliary blow vents that narrow left and right block is provided with 4 reinforcement arm pawls (51e), and the square-section of each reinforcement arm pawl is thicker, and the minimum 2mm that is greater than of thinnest part, gains in strength so that cross section is thicker,Near the back side of the two auxiliary blow vents (51b) in a left side that the described left block (g51) of the described two auxiliary blow vents that narrow left and right block is provided with, be provided with long reinforcement (51c), narrow two larger local pressures caused by auxiliary blow vent to gain in strength to resist; Near the back side of the pit of the two auxiliary blow vents (51b) in a left side that the described left block (51) of the described two auxiliary blow vents that narrow left and right block is provided with, be provided with short reinforcement (51d), narrow two larger local pressures caused by auxiliary blow vent to gain in strength to resist; The two auxiliary blow vents (52b) in the right side that the described right block (52) of the described two auxiliary blow vents that narrow left and right block is provided with are pits, the length, width and height of its pit are approximately identical with a left side pair auxiliary blow vents (51b) that described left block (g51) is provided with, to gain in strength, resist and narrow two larger local pressures caused by auxiliary blow vent; The two auxiliary blow vents (52b) in the right side that the described right block (g52) of the described two auxiliary blow vents that narrow left and right block is provided with are pits, the length, width and height of its pit are identical with the two auxiliary blow vents (51b) in a left side that described left block (51) is provided with, length, width and height in 1E33 type are for being not more than 19x7x4.8mm, with the convenient local volumetric that narrows, strengthen local air flow pressure and flow velocity and additional turbulence is returned and altered and fall row; The waste gas of engine is directly discharge not, but indirectly discharges from the nearly tool bore (28a) of aluminum pipe after catalase hush tube by one meter five; Described Low-emission gasoline brush cutter is characterized in that described cutter is containing beating the grass the moving head (54) of wire (54b) in order to long-acting cutting with cutting buttress, and the disc cutterbar (64) with inner sawtooth (642) is in case cutter relieving; With and the carburetor of engine establish four bifurcated nozzles (70a) in order to atomization; And described cutter is provided with the outer protective cover (73) that is contained on interior protective cover (60) and on its outer protective cover, is provided with its roller length equal to beat the grass long grass pressing wheel (74) of diameter, so that press grass soil moisture conservation and meadow decorative pattern; Moving head (54) contained by described cutter with to cut the buttress way that wire (54b) is provided with its multiple sharp swords of multiple sharp swords (54a) of beating the grass be on wire, to cut to pile up neatly under hammering with sharp plain chisel, and described wire is round; Moving head (54) contained by described cutter with cut the buttress wire (54b) of beating the grass and be provided with multiple sharp swords (54a), the way of its multiple sharp swords is on wire, to cut to pile up neatly under the impact of stamping machine with the plunger chip die that has sharp edge, and described wire is flat; The outer cutting edge (641) of the periphery of 4 cuttves that stretch out that the disc cutterbar with inner sawtooth (642) (64) contained by described cutter is provided with is provided with multiple outer sawtooth (64a), and described inner sawtooth (642) also has 4, and its every inner sawtooth (642) is established multiple sawtooth; The outer protective cover (73) of installing on protective cover (60) in described cutter is set is provided with installs draw-in groove (73b) and 2 screw hole positions (73a) in order to installation, and on its outer protective cover (73), be provided with beat the grass rope spacing (73c)And the grass pressing wheel mounting bar (73d) and the arc enclosing bar (73e) that on its outer protective cover (73), are provided with for long grass pressing wheel (74) is installed, its described roller length equal to beat the grass long grass pressing wheel (74) of diameter is rotating, the diameter that the axial length i.e. roller of its grass pressing wheel is long-range is greater than its grass pressing wheel, that is, the axial length i.e. roller of its grass pressing wheel grow to the diameter that is its grass pressing wheel less 3 doubly, spacing (73c) that the described diameter of beating the grass refers to the rope of beating the grass that described its outer protective cover (73) is provided with is the radius of beating the grass to the distance of cutter rotary middle spindle, and it 2 is doubly the described diameter of beating the grass, its roller length of long grass pressing wheel (74) diameter that equals to beat the grass then just in time can be pressed onto the grass just having cut, or its roller length be beat the grass diameter 1.2 doubly, its described roller length equal to beat the grass long grass pressing wheel (74) of diameter is rotating, the diameter that the axial length i.e. roller of its grass pressing wheel is long-range is greater than its grass pressing wheel, that is, the axial length i.e. roller length of its grass pressing wheel be its grass pressing wheel diameter 3 doubly, or more than, so that press grass soil moisture conservation, its described roller length equal to beat the grass long grass pressing wheel (74) of diameter is provided with the careless groove of multiple pressures (74b), and its groove is along its roller length direction or straight groove, or corrugated bending groove, and the slot cross-section (74a) of the careless groove of described pressure or square, or semicircular, and the careless groove of described multiple pressure is at least 2, so that press grass soil moisture conservation and meadow embossing and skid less, it is characterized in that: the gas control device of its described engine is established and on the outlet that four bifurcated nozzles (70a) refer to the nozzle (70) in the inside of gas control device, established 4 gaps week along ring and be four bifurcated nozzles (70a), be beneficial to homogenize to improve the fluid state of combustion gas through gap, namely be commonly called as in carburetor assembly (F56) at gas control device, the interior straight tube (70) that improves atomizer is also established 4 gaps week along ring on the outlet of vortex spray bar of helicla flute (71) be four bifurcated nozzles (70a) for being had, or be 3 bifurcateds, or be 5 bifurcateds, or be six bifurcateds, or be 7 bifurcateds, or be eight bifurcateds, if 1 gap, or 2 gaps, then go out vapour irregular, if more than 9 gaps, because outlet is less than 3mm, then gap is too fine and closely woven, when combustion gas is poured described interior straight tube (70) through the interior straight tube (70) of improvement air nozzle in described gas control device assembly (F56) or the horn mouth of archimedes curve that has the import of vortex air jet pipe of helicla flute (71) to be set to parabolical horn mouth (72) or conical section and had the vortex air jet pipe of helicla flute (71), extrude to multi-direction dispersion in 4 gaps or 3-8 the gap of and then from the outlet of described air jet pipe, establishing along ring week again, instead of only extrude from a hole to a direction, multiple its vibrations of back and forth trembling because cantilever beam principle has that form between multiple gaps of establishing because edge ring on described outlet is all are again to the steam flow effect of adding fuel to the flames, will in the air-breathing moment of engine, at the aditus laryngis key position of this trunnion, sharply mixed when handing over homogenize and be more conducive to be polymerized mixed gas effect and disperse mixed effect at accelerating fluid and the air-flow of coming from air filter,Enter with the combustion gas state of homogenize more in the scavenging road junction (g45) of symmetrical left and right each of the described cylinder body (944) of engine, then the wedge turbulent flow being provided with through each each ground, left and right symmetrically returns and alters sheet (g46) effect and enter the combustion chamber that the piston of engine and cylinder form and be beneficial to week and reciprocally work.Gas control device English is still commonly called as and is carburetor, the engine of mower is driven once to appoint fuel tank to contain miniature propane fuel tank (p20), fuel support (p21), fuel band (p22) with LPG described in it, the front portion of described miniature propane fuel tank (p20) is provided with gas thread (p20a), so that described fuel enters the engine of described driving mower by pipe joint through mixed airgun controller and works, the front portion of described miniature propane fuel tank (p20) be provided with safety valve (p20b) in case in excess of the quota time overflow and play safety effect, the rear portion of described miniature propane fuel tank (p20) is provided with tank base disk (p20c), and is provided with the base holes (p20d) of multiple equal distribution on described tank base disk (p20c), described fuel support (p21) is provided with pedestal (p21d), the rear portion of described pedestal (p21d) is provided with rear plate washer (p21b) to locate described tank base disk (p20c), the both sides of described pedestal (p21d) are respectively equipped with semicircular arc support (p21c), and the upper each ground, left and right of the semicircular arc support (p21c) be respectively equipped with in described both sides is provided with the rectangular frame of band (p21a) to connect described fuel band (p22), the semicircular arc bracket lip of the wherein side that described fuel support (p21) is provided with is provided with carriage mounting plate (p21g), and on described carriage mounting plate (p21g), be provided with installation through hole (p21e) and groove (p21f) be installed so that fixing, the main body of described fuel band (p22) is braid over braid, one end of described braid over braid is sewn together with the plastic with two oblong aperture (p22a), one section of described braid over braid is sewed the magic band (p22b) of multiple hard hook, and another section of described braid over braid then sews soft flannelette (p22c) to have the magic band (p22b) of multiple hard hook to match with described, described engine with miniature propane fuel tank (p20) lie on described fuel support (p21), and to be fastened by described fuel band (p22).

2. LPG gas engine according to claim 1 drives mower, it is characterized in that: described engine is closely-pitched to be tightly connected with the screw thread of the gas thread (p20a) that the front portion of miniature propane fuel tank (p20) is provided with.

3. LPG gas engine according to claim 1 drives mower, it is characterized in that: to be tightly connected when the screw thread of the gas thread (p20a) that described engine is provided with the front portion of miniature propane fuel tank (p20) is 3/4.

4. LPG gas engine according to claim 1 drives mower, it is characterized in that: described engine is that after heat treatment its hardness reaches 27.5HRC to be tightly connected with the screw thread of the gas thread (p20a) that the front portion of miniature propane fuel tank (p20) is provided with; The propane degree of described miniature propane fuel tank is up to 99%, and impurity is few.

5. LPG gas engine according to claim 1 drives mower, it is characterized in that: the screw thread of the gas thread (p20a) that described engine is provided with the front portion of miniature propane fuel tank (p20) is that the volume fraction of after heat treatment its retained austenite scale of construction is less than 3% to be tightly connected; Described miniature propane fuel tank high pressure extrusion/moulding goes out.

6. LPG gas engine according to claim 1 drives mower, it is characterized in that: the end of the screw thread of the gas thread (p20a) that described engine is provided with the front portion of miniature propane fuel tank (p20) is provided with rubber seal to be tightly connected.

7. LPG gas engine according to claim 1 drives mower, it is characterized in that: the tank base disk (p20c) that the rear portion of described miniature propane fuel tank (p20) is provided with is provided with the base holes (p20d) of six equal distribution so that the rear plate washer (p21b) be provided with the rear portion of the pedestal (p21d) of described fuel support is located.

8. LPG gas engine according to claim 1 drives mower, it is characterized in that: the main inner profile curve that the both sides of described pedestal (p21d) are respectively equipped with semicircular arc support (p21c) is one section that equiangular spiral that pressure angle is equal everywhere is also called logatithmic spiral, also to have the near bag of multipoint pressure corner connection to embrace pressure when shake is trembled.

9. LPG gas engine according to claim 1 drives mower, it is characterized in that: be provided with screw thread to save a fixing nut in the installation through hole (p21e) that the carriage mounting plate (p21g) that the semicircular arc bracket lip of the wherein side on described fuel support (p21) is provided with is provided with, and the installation groove (p21f) that described carriage mounting plate (p21g) is provided with is bending groove also can locate when certain hold-doun nut drops.

10. LPG gas engine according to claim 1 drives mower, it is characterized in that: the main body of described fuel band (p22) is the wide braid over braid of 30mm, and one of described braid over braid section of magic band (p22b) having the 28mm of multiple hard hook wide of sewing, another section of described braid over braid then sews the wide soft flannelette of 29mm to have the magic band (p22b) of multiple hard hook to match with described, is also not grieved finger with the narrower magic band (p22b) of multiple hard hook.