CN108811683A - The grass trimmer of tool protection circuit - Google Patents

The grass trimmer of tool protection circuit Download PDF

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Publication number
CN108811683A
CN108811683A CN201810464673.0A CN201810464673A CN108811683A CN 108811683 A CN108811683 A CN 108811683A CN 201810464673 A CN201810464673 A CN 201810464673A CN 108811683 A CN108811683 A CN 108811683A
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CN
China
Prior art keywords
gear
motor
blade
rear axle
teeth
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201810464673.0A
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Chinese (zh)
Inventor
苏克
叶晓波
叶坚泽
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ningbo Daye Garden Equipment Co Ltd
Original Assignee
Ningbo Daye Garden Equipment Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ningbo Daye Garden Equipment Co Ltd filed Critical Ningbo Daye Garden Equipment Co Ltd
Priority to CN201810464673.0A priority Critical patent/CN108811683A/en
Publication of CN108811683A publication Critical patent/CN108811683A/en
Pending legal-status Critical Current

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Classifications

    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01DHARVESTING; MOWING
    • A01D34/00Mowers; Mowing apparatus of harvesters
    • A01D34/01Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus
    • A01D34/412Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters
    • A01D34/63Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters having cutters rotating about a vertical axis
    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01DHARVESTING; MOWING
    • A01D34/00Mowers; Mowing apparatus of harvesters
    • A01D34/01Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus
    • A01D34/412Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters
    • A01D34/63Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters having cutters rotating about a vertical axis
    • A01D34/73Cutting apparatus
    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01DHARVESTING; MOWING
    • A01D34/00Mowers; Mowing apparatus of harvesters
    • A01D34/01Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus
    • A01D34/412Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters
    • A01D34/63Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters having cutters rotating about a vertical axis
    • A01D34/76Driving mechanisms for the cutters
    • A01D34/78Driving mechanisms for the cutters electric
    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01DHARVESTING; MOWING
    • A01D34/00Mowers; Mowing apparatus of harvesters
    • A01D34/01Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus
    • A01D34/412Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters
    • A01D34/63Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters having cutters rotating about a vertical axis
    • A01D34/82Other details
    • A01D34/828Safety devices
    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01DHARVESTING; MOWING
    • A01D69/00Driving mechanisms or parts thereof for harvesters or mowers
    • A01D69/02Driving mechanisms or parts thereof for harvesters or mowers electric

Abstract

The grass trimmer of tool protection circuit, grass trimmer control wheel are equipped with the 5G mobile phone positioned by Beidou, energy remote-control mower, equipped with face and fingerprint recognition to confirm the people to give an order for the first time or manned or automatic Pilot.There is this circuit over-voltage protecting function main purpose to be that circuit power is protected to carry out circuit power cutting when overtension, be protected using the reverse breakdown principle of voltage-stabiliser tube;It is additionally provided with under-voltage protecting circuit, is protected when circuit voltage is less than setting value, the principle of comparator is utilized;LM224 is four road operational amplifiers, amplifier is inputted into one end and is set as a reference value, another input terminal is set as fiducial value, output end is without feedback, then wirelessly amplification and output are supply voltage value (VCC), signal one high and one low in this way forms logic circuit, the signal of LOW_V_Fault is transmitted to MCU by the switch of triode, MCU is handled according to signal.

Description

The grass trimmer of tool protection circuit
Technical field
The present invention relates to a kind of for the hay mower that places cut the grass on a lawn beside garden, park and road etc., is adopting On the basis of the straight ripple powder metallurgy lawn machine gear-box of pressure logarithmic curve arc wave such as having, the lawn further developed is cut The grass trimmer of careless machine and the general mower blade of gardens intelligent grass-removing and tool protection circuit.
Background technique
Hay mower is widely used in being cut not in the way of walk sometimes from walking sometimes by the hobby of people is selected Grass.Operation pedestrian pulls from control crank is walked, and by wirerope and driving lever, clutch block is made to be axially displaced to clutch.It is existing The clutch block of arrangement of clutch in the rear wheel drive The gear deceleration clutch of the traverse gear of technology is only by clutch block side Circular cone carrys out clutch, needs biggish axially combined power, and the damage phenomenon for causing internal pressure ring washer to be broken occurs frequently;Between circular conical surface Frictional heat is generated in engaging process, needs to add lubricating oil in gear-box;And there is friction to have opposite sliding between circular conical surface, consume function Rate.It is hay mower gear-box either Plastic or metal class, it is limited by technology and cost etc., walks clutch certainly not Steady and insecure situation happens occasionally, and solves the problems, such as sporadic not clutch, is always the international long-standing of industry Problem.
Part used in conventional mowing knife system is more more expensive;Also heavier, rotary inertia is larger, and power hungry is more;And Knife be rigid connection, when encountering sundries such as water pipe, be it is very stiff and demanding, without security protection.The side of common hilted broadsword only have sword and Anodontia, Ren Yi Blunt encounters stem and cuts bad, often tears;Especially its end face circumferentially is anodontia, and end face is in circle The revolving speed at all positions is high, and cutting function is strong, therefore it is very big loss to ablation energy that the end face of common hilted broadsword is anodontia.
Working condition caused by the clutch in rear wheel drive retarder in order to overcome the hay mower prior art Deficiency associate the present inventor and also to invent several different types of hay mower clutches and retarder Once it was related to certain devices of manufacture as senior engineer SENIOR ENGINEER such as Switzerland external, and was improved special kneading, then auxiliary Product can be made to attain a yet higher goal with invention, the present inventor has made a variety of designs and innovation with lifetime domestic and international working experience, just like The mankind pursue invention perfection be it is forever continuous, below just a variety of gradually improve and perfects practical plan combine a variety of diagrams And it is explained in detail.
Summary of the invention
In order to overcome part used in the conventional mowing-apparatus of the hay mower prior art more, rotary inertia is larger, Power hungry is more, and knife is rigid connection, does not have the shortcomings that security protection, the present invention provides a kind of hay mower cutting machine The improvement of structure, be for hay mower should not independent tool apron knife, the referred to as hay mower hay knife without tool apron, one Part can be made, which to reduce , Zao Price, to be reduced;Two can make weight saving, and consumption power is reduced;Three can make it have the function of security protection. Only have sword and anodontia, Ren Yi Blunt for the side for making up common hilted broadsword again, encounters stem and cut bad, often tear; Especially its end face circumferentially is anodontia, and end face is high in the revolving speed of circumferential location, and cutting function is strong, therefore the end face of common hilted broadsword Anodontia is the shortcoming of the very big loss to ablation energy, and the present invention is improved in many years, such as material, heat treatment, mechanism, form, Especially provide a kind of hay mower multiple tooth mowing on the basis of the hay mower hay knife without tool apron as mentioned again Knife, the multiple tooth length that blade is considerably increased than hilted broadsword, has more folding swords and there are many impact cutting angle and slip cutting angles, is conducive to enhance Straw and straw efficiency are cut, the hunchbacked formula bottom of shear blade grinds structure, so that it is had self-grinding and wear-resisting persistence, and because of multiple tooth ratio Former hilted broadsword is sharper and saves power consumption.
The power of common hay mower is used from the vertical cutter shaft for the engine being located in the middle part of hay mower Belt and belt pulley carry out primary transmission, and revolving speed is changed into 1500 turns every point from every point 3000, then carries out secondary transmission and guide to position In the retarder containing clutch of the driving rear axle at hay mower rear portion, the gear ratio of two stage reducer is up to 5, and revolving speed is from every point 1500 are changed into 300 turns every point of driving rear axle, then carry out three-level transmission, by the coaxial driving gear and lawn of driving rear axle Internal gear gear ring in the rear-wheel of grass trimmer is meshed, and because rear-wheel will adjust different mowing heights, therefore the axis of rear-wheel is in adjusting height It is upper and with driving rear axle cannot coaxial but two axis it is parallel, make hay mower it is maximum from speed is walked substantially at one meter per second, To meet customer requirement.
For energy-saving and emission-reduction, nocuousness HC hydrocarbon emission is reduced, on the one hand hay mower is to improve engine On the other hand discharge is using electric energy, generally only several hectowatts low with lithium battery power must go to charge each hour;And lawn Grass trimmer makees a few hours with starting the thousands of bricklayers of function;Nevertheless, the hay mower or order of electricity consumption significantly increase, because People pursue environmental protection target be it is firm, pursue the automation of operation and intelligence be it is endless, as a result, Yi Zhongyou The cutter blade for mowing machine and reducer gear of energy-saving circuit control and the processing of the carbon, nitrogen and boron of air-cooled inner shaft are just come into being.
The present invention solves the technical method that its technical problem is taken:
Grass trimmer front is equipped with bumper (109), and bumper is equipped with flexible comb, is additionally provided with magnetic survey device and Doppler Detector, with iron pipe in defense sector.On clad steel plate direct punching press for connection molding;Should not independent tool apron knife, be knife What seat and knife were integrated, it is additionally provided with the key of security protection thereon, is the mower blade in the multiple logarithm teeth of tool and noise reduction hole.
A kind of engine spindle mowing-apparatus, especially the hay mower hay knife without tool apron, on the steel plate of knife, In the riding position region of engine spindle and fastening bolt (17), it is equipped with pit (2), key (1), keyway (3), such as Fig. 1, Fig. 3, Shown in Fig. 4, Figure 10 and Figure 11;It is characterized in that:The internal diameter of the pit (2) is equal to or tolerance is outer slightly larger than engine spindle There is hole in the centre of diameter, the bottom of the pit (2), to be passed through fastening bolt (17);The edge of the pit (2) The band of position of key is placed, is equipped with key (1), it is characterized in that:The key (1) is rectangle, and is to utilize material from the steel plate of knife And punching press bending and it is molding, or produced with welding or splicing, and the two sides of its square-section, at least one side, It installs and sticker is in the keyway of engine spindle;The especially root of the key (1), that is, the steel plate of key (1) and knife And the interconnecting piece with the band of position of the placement key at the edge of the pit (2), the crack arrest slot for thering is punching press to bend, so as to correct Ground selects suitable shear strength so that can be mowed by key but when encountering water pipe the root overloading of key and protect. The method for correctly selecting suitable shear strength is concisely described below:The root of the manufacture key (1) can With the crack arrest channel process of secondary wall.Secondary wall refers to the metal plate wall being connected on other thin-walleds, can be counted as the son of major wall ?.The seamed crack arrest slot of the crack arrest slot of the root of key, no crack arrest slot, stretching, extension crack arrest slot, rectangle crack arrest slot, oblong crack arrest slot, most It is to select seamed crack arrest slot well.It is recommended that available system defaults equation, with the Y factor or K factor with computer bending machine and PROE;Or it uses Predefined bending table;Or the bending table with customization;Material property and compensation are considered by system.If not by the bending of customization Table is assigned to sheet metal component, can calculate length of run with following formula:
θ/90 L=(pi/2 xR+YxT) x
In formula, L is the length of run of key;R is the inner radius of key;Y factor can use 0.5 herein;T is steel plate thickness, is beaten It is convex that side is rolled over and many places are dashed forward, and the modulus of the mechanics of materials can be improved, and reduces steel plate thickness;θ is bending angle, can be selected between 80-100 It takes.Y factor and K factor are that part defined in the position of the neutral bending line for the relative thickness as sheet metal component material is normal Number.K factor is the ratio from neutral bending line the distance (δ) to inside radius bend and material thickness (T), and formula is K=δ/T.The Y factor is the ratio between the length of neutral bending line and material thickness (T), and formula is Y=Kx (pi/2).It can With accessing text and the report of HTML sheet metal component and the precision of setting sheet metal component.Select the method for suitable shear strength second is that real Method of verification is trampled, in the root of the key (1), that is, peace of the key (1) with the steel plate of knife and with the edge of the pit (2) The interconnecting piece of the band of position of key is put, no wheel is the crack arrest slot for having punching press to bend, or produced with welding or splicing, practice card If bright still its intensity is excessively high, material reducing is taken to cut out method, i.e., in the root of its key, digging material becomes the root portion section of key Carefully, to select suitable shear strength.The keyway (3) is characterized in, the placement at the edge of the pit (2) The band of position of common key (13), equipped with wide keyway as the keyway of engine spindle, this is spare for certain occasions , such as plus when woodruff key, such as plus when spare key.In the middle part of the steel plate of knife, to beat side folding and many places are dashed forward and convex are thinned with enhancing.
Only have sword and anodontia, Ren Yi Blunt for the side for making up common hilted broadsword again, encounter stem cut it is bad, often It tears;Especially its end face circumferentially is anodontia, and end face is high in the revolving speed of circumferential location, and cutting function is strong, therefore common single It is the shortcoming of very big loss to ablation energy that the end face of knife is anodontia, and the present invention is improved in many years, such as material, such as 65Mn, such as 40MnB, heat treatment such as carbo-nitriding, mechanism such as hilted broadsword, multitool, stationary knife, knife living, form such as flat cutter, jack knife, tulwar black, spray Black modeling, have seat without seat, as mentioned on the basis of the hay mower hay knife without tool apron, especially provide a kind of lawn The multiple tooth hay knife of grass trimmer.Referring to Figure 12, Figure 13, Figure 14, the multi-tooth hey knife for lawn mower is mainly more by side Tooth (24), apical tooth (25), end multiple tooth (26), wind wing cutting edge (27), wind wing elliptical aperture (28), wind wing honeycomb (29) and cutter hub Middle through-hole (18), key (1), pit (2), keyway (3) are formed;It is characterized in that the side multiple tooth (24) are to be located at cutter hub Steel plate side, that is, the place of original blade are in the direction of advance of hay knife rotation, with the middle through-hole of cutter hub It (18) is reference, steel plate side is equipped with multiple teeth on one side, at least one, or up to hundred, such as 16.If tooth is few, It preferentially keeps to the side i.e. by the outermost end of rotation round;And lean on rotation round outermost end, it is multiple tooth (26) equipped with the end, at least 1, or up to dozens of, such as 3;Again in multiple tooth (26) junction in the side multiple tooth (24) and the end, it is equipped with institute The apical tooth (25) stated.It is that the side is multiple tooth (24) referring to Figure 20, the end multiple tooth (26) and the apical tooth (25) The schematic diagram of the cross section of tooth, the feature with common tooth.The common tooth is characterized in, the cross of each tooth The stretched back of a bow (19) of the useful steel plate punched in section, the steel plate of hunchbacked two sides has certain angle, referring to Figure 19.The back of a bow Bottom polish and grind cutting edge (20), referring to Figure 20.In addition, the side is multiple tooth (24), the end is multiple tooth (26), and (in terms of vertical view and stereoscopic schematic diagram) common edge feature of the tooth of the apical tooth (25) is that each tooth has side There is wedge angle on side;And there are cutting edge in two sides or at least one side;Wedge angle or fillet, the less sharp angle mutually passed through, but substantially shape Shape is that the head of tooth is small and root is coarse;The side of the tooth or straight bevel edge or curved, arc, or saw thread form, or The side of prominent arc or concave arc shape, the especially tooth is arc, preferably involute.The wind wing of knife is equipped with The wind wing cutting edge (27), characterized in that the wind wing is equipped at least one or more notch, such as 4, each to lack The edge of mouth is additionally provided with cutting edge (27), twines grass with benefit cutting, can be referring to Figure 13.On the wind wing of knife or equipped with the wind wing ellipse Hole (28), the elliptical hole at least one, or up to hundred, such as 6, there is the booster action of noise reduction with benefit, can be referring to Figure 15.On the wind wing of knife or equipped with the wind wing honeycomb (29), the wind wing honeycomb (29) at least one, or it is up to several Ten, such as 6, there is the booster action of noise reduction with benefit, it can be referring to Figure 16;Especially the wind wing honeycomb (29) is protrusion, Circular cone or pyramid, especially hexagonal pyramid shape, and middle part has through-hole (30), it can be referring to 17 and Figure 18.
Multi-tooth hey knife for lawn mower, mainly by side multiple tooth (24), apical tooth (25), end multiple tooth (26), wind wing cutting edge (27), the middle through-hole (18) of wind wing elliptical aperture (28), wind wing honeycomb (29) and cutter hub, key (1), pit (2), keyway (3) institute Composition;It is characterized in that:The side multiple tooth (24), holds the head of multiple tooth (26) small and root is coarse at apical tooth (25);The side Multiple tooth (24) be located at cutter hub steel plate side, be hay knife rotation direction of advance on, in the middle through-hole of the cutter hub (18) on the side of the cutter hub steel plate of two sides, multiple teeth for being equipped with;In the outermost end of cutter hub rotation round, equipped with the end Multiple tooth (26);In multiple tooth (26) junction in the side multiple tooth (24) and the end, equipped with the apical tooth (25);Described Side multiple tooth (24) holds the cross section of multiple tooth (26) and apical tooth (25) to have a common feature, it is described common feature is that, Each side multiple tooth (24), the back of a bow for holding the useful steel plate punched in cross section of multiple tooth (26) and apical tooth (25) stretched (19), the steel plate of the two sides of the back of a bow has certain angle, and the bottom of the back of a bow grinds cutting edge (20), is cut with benefit Disconnected function;The wind wing of cutter hub is equipped with the wind wing cutting edge (27);The wind wing of cutter hub is equipped with the wind wing honeycomb (29); The middle part of cutter hub is equipped with the middle through-hole (18), key (1), pit (2) and keyway (3).The end multiple tooth (26) is located at The outermost end of cutter hub rotation round;And it is at least multiple tooth (26) with end described in one.In the side multiple tooth (24) and described End multiple tooth (26) junction be equipped with the apical tooth (25), there is cutting edge at least one side.The side multiple tooth (24), Multiple tooth (26) and apical tooth (25) are held, not only has the bottom of hunchbacked (19), the back of a bow to have cutting edge with common cross section (20) feature, and side multiple tooth (24), end multiple tooth (26) and the apical tooth (25) has common edge feature, side Edge is characterized in that each side multiple tooth (24) holds multiple tooth (26) and apical tooth (25) to have side, there is wedge angle;Its at least one There is cutting edge in side;The side multiple tooth (24), the side for holding multiple tooth (26) and apical tooth (25) are straight bevel edge or saw-shaped side, Or prominent arc-shaped side or concave arc shape side.The wind wing of the cutter hub is equipped with the wind wing cutting edge (27), the wind wing It is equipped at least one notch, and the edge of notch is additionally provided with cutting edge.The wind wing of the cutter hub is equipped with the wind wing bee Nest (29), and at least with wind wing honeycomb (29) described in one;The wind wing honeycomb (29) is the cone of protrusion, or Hexagonal pyramid shape, and middle part has through-hole (30).Knife is equipped with through-hole, so that knife is flattened on spindle end, makes through-hole alignment spindle end mesoporous, also Big pressure pad circle must be put, then puts fastening bolt.Paying attention to common bolt all is anti-silk rather than positive silk.Two points of a knife must also be adjusted Balance and progress prosthetic foot test.
Only has sword and anodontia to make up the side of common hilted broadsword again, especially its end face circumferentially is anodontia lacks It owes, the present invention has made many improvement for many years.Such as material tried all available from 65Mn to 40MnB or general steel plate carburizing;But When manufacturing multiple tooth, to set more give a discount and thickness thinning, be press-formed well with side;Most handy heat stamping and shaping, tooth form are more satisfactory.Heat Processing such as carbo-nitriding also can be used.Mechanism such as hilted broadsword, multitool, stationary knife, knife living, form such as flat cutter, jack knife, tulwar black, spray black Modeling, there is seat, no seat, various hay mower hay knives, can all be improved to hay mower of the present invention and use Multiple tooth hay knife.It is reference with the middle through-hole 18 of cutter hub in the direction of advance of hay knife rotation, the one steel plate side in one side It is equipped with multiple teeth, at least one, or up to hundred, such as 16.If tooth is few, preferentially keep to the side i.e. by the outermost of rotation round End;And in the outermost end for leaning on rotation round, equipped with the end multiple tooth 26, at least one, or up to dozens of, such as 3;Again In multiple tooth 26 junction in the side multiple tooth 24 and the end, equipped with the apical tooth 25.With it is identical it is multiple up and down modules, It steel plate punched stretched hunchbacked 19, heats and suppresses, so that the two sides steel plate of the back of a bow is had certain angle, and have the arc of logarithm line Degree;The multiple tooth length that blade is considerably increased than hilted broadsword, has more folding swords and there are many impact cutting angle and slip cutting angles, flys in circles in knife When, cutting grass, straw and straw have stronger efficiency, and structure is ground at the hunchbacked formula bottom of shear blade, it is made to have wearability and save dynamic Power consumption.Because material to be cut is flexible, when single-blade, makes careless phenomenon more, and while more rolling over sword, to hug careless function stronger.Knife is equipped with wind Wing pushes away grass and incites wind action, and fraction passes through the booster action that wind wing elliptical aperture has noise reduction.Wind wing honeycomb is polygonal pyramid Shape, and there is through-hole at middle part;When hay knife flys in circles, wind wing pushes away grass and incites wind action, and fraction passes through the wind wing Honeycomb 29, collocation suitably just have noise elimination wedge honeycomb effect and preferable noise reduction booster action.Mower blade, grass trimmer, which contains, to be subtracted The gear shaft of fast device is tubulose and retarder from gear drive inner shaft containing noise elimination (100a), so as to cooling of eliminating the noise;Described New be equipped with from gear shaft in its side containing motor of retarder is empty tubulose, and inside is logical so that outer blowing air is cooling, tooth Wheel is herringbone bear;250 watts of 20000 turns of every point of revolving speed, the power of brushless motor, 36 volts, 5 millimeters of shaft diameter of output;Motor The number of teeth 18 of driving gear (88), modulus 0.6, reference circle are 18x0.6=10.8;Remove planetary gear train, the motor is actively Gear (88) is engaged with the motor on the motor driven axis newly set from gear (106), and the motor is the number of teeth from gear (106) 38, modulus 0.6, reference circle are 38x0.6=22.8, and motor driven ratio is 38/18;The motor out of gear with 14x5 bearing Match;It is equipped on the motor driven axis newly set from tooth sleeve (100) and female connector gear (102), the female connector gear (102) The number of teeth be 12 and modulus be 1.5, the female connector gear with as 2812 Double-gears on output gear and the first jackshaft (104) it be 1.5, reference circle is that 28 gears of 28x01.5=42 are meshed that the number of teeth, which is 28, modulus, the motor newly set from The output gear of moving axis and the first jackshaft transmission ratio are 28/12;The above transmission ratio is 38/18x28/12=4.9, is more than planet No-load voltage ratio 4.33, actually shares;Remaining no-load voltage ratio is roughly the same;28 gears of 2812 Double-gear (104) containing the 28 coaxial numbers of teeth The both ends of 12 gears (104c) of (104a) and 12 numbers of teeth, 2812 Double-gear (104) are respectively provided with small bearing (103), described The outer diameter of small bearing (103) is 14mm, so as to the inner hole at the both ends with 2812 Double-gear (104), the small bearing (103) internal diameter be 5 so as to the first jackshaft activity assemble;Identical 2812 Double-gear of another structure (104) also 12 gears (104c) of 28 gears (104a) containing the 28 coaxial numbers of teeth and 12 numbers of teeth, on the second jackshaft, institute The both ends for stating 2812 Double-gears (104) are respectively provided with small bearing (103), and the outer diameter of the small bearing (103) is 14mm, so as to institute State the inner hole at the both ends of 2812 Double-gears (104), the internal diameter of the small bearing (103) be 5 so as to described second among Axis activity assembly;The 12 of coaxial 28 gears (104a) in 28 numbers of teeth of 2812 Double-gears (104) on first jackshaft 12 gears (104c) of the number of teeth, 2812 Double-gear identical with another structure on second jackshaft (104) also 28 gears (104a) containing the 28 coaxial numbers of teeth are meshed, 28 gears (104a) and institute on second jackshaft The the second axis transmission ratio stated between 12 gears (104c) of 12 numbers of teeth of 2812 Double-gears (104) on the first jackshaft is 28/ 12 be 2.33;2812 Double-gear (104) is containing 28 gears (104a) of the 28 coaxial numbers of teeth and 12 gears of 12 numbers of teeth (104c) is with polyformaldehyde machine-shaping in injection mold;The rear axle output par, c of the retarder is containing coaxial length half Rear axle and short half rear axle are sequentially arranged with rear axle driving reducing gearbox oil sealing on half rear axle of length, peace closes elastic clip (92), iron pad Circle, safety clutch bore (90), hang shelves disk (101), extension link stopper (91a) rear axle driving gear (91) is closed containing peace, pressing from both sides axis in long axis, institute It states long half rear axle and is equipped with radial cross-drilled hole will pass through lateral pin nail with safety clutch cone (90) and be connected, the peace closes elastic clip (92) the safety clutch cone (90) and the extension shelves disk (101), the safety clutch cone (90) and the extension shelves disk are sandwiched (101) it hangs link stopper (91a) rear axle driving gear (91) with described close containing peace and is connected, one end of half rear axle of length is equipped with axial deep Hole presss from both sides axis to be inserted into the long axis, is inserted into the axial deep hole that one end of short half rear axle is equipped with and makes the length half Rear axle and the short half rear axle activity are connected;Be sequentially arranged on short half rear axle rear axle driving retarder upper cover and oil sealing, It is successively filled with another set of peace to close elastic clip (92), iron washer, safety clutch cone (90), hang shelves disk (101), after described short half Radial cross-drilled hole also is provided on axis will pass through lateral pin nail with another set of safety clutch cone (90) and be connected, another set of is described Peace closes elastic clip (92) and sandwiches the safety clutch cone (90) and the extension shelves disk (101), described on short half rear axle Safety clutch bores (90) and the extension shelves disk (101) and also hangs the driving of link stopper (91a) rear axle with unique described close containing peace above-mentioned Gear (91) is connected;The number of teeth that extension link stopper (91a) rear axle driving gear (91) is closed containing peace is 33 teeth and modulus is 2.5;Institute It states 12 gears (104c) of 12 numbers of teeth of 28 gears (104a) on the second jackshaft and described on the rear axle closes containing peace and hang It is 2.75 that transfer rear axle transmission ratio between link stopper (91a) rear axle driving gear (91), which is 33/12,;Retarder resultant gear ratio is 4.3x33/12x28/12x28/26=4.3x6.9=30 again, sharing;It is characterized in that, the tooth of the motor driving gear (88) Number 18, modulus 0.6, reference circle are the metal gears of 18x0.6=10.8, so as to general;Remove planetary gear train, the motor master Moving gear (88) is engaged with the motor on the motor driven axis newly set from gear (106), and the motor is the number of teeth from gear (106) 38, modulus 0.6, reference circle are the metal gears of 38x0.6=22.8, and motor driven ratio is 38/18;The motor is out of gear Match with 14x5 bearing;The motor is equipped with the sipes hole (106a) of the uniformly distributed quartering out of gear to allow from tooth sleeve (100) the wide pawl insertion of four, the motor are equipped with the narrow slot hole (106c) of the uniformly distributed quartering out of gear to allow from tooth set Four fan pawls insertion of cylinder (100), four fan pawls are conducive to radiate;The other end from tooth sleeve (100) is set There are four pusher dogs to be mutually formulated with the female connector gear (102) being equipped on the motor driven axis newly set, the female connector The number of teeth of gear (102) be 12 and modulus be 1.5, the small bearing (103), interior insertion are equipped in the female connector gear (102) The motor driven axis newly set;Described to be equipped with big bearing from the outside of tooth sleeve (100), the big bearing is located on reducing gearbox; It is equipped on the motor driven axis newly set from tooth sleeve (100) and female connector gear (102), the tooth of the female connector gear (102) Number is 12 and modulus is 1.5, and the other end of the other end of half rear axle of length and short half rear axle is respectively provided with laterally double cut With civilian dress rear wheel drive gear, the rear wheel drive gear is 14 tooth modules 2.5, and is driven with the rear-wheel for slot and laterally double groovings Rear-wheel gear ring (107) of the movable tooth wheel drive in hay mower rear-wheel, the number of teeth of the rear-wheel gear ring (107) are 82 tooth moulds Number 2.5 matches big grass trimmer rear-wheel;The exit the impeller Ye Dao blade angle of the fan of each fan pawl from tooth sleeve (100) Degree is greater than 90 degree, is the fan of the impeller of Forword vane;It has cold wind effect;The motor of retarder is equipped with motor control electricity Road;Motor control part principle:
Integrated chip control program, the decoding of built-in chip type rotor-position are purchased in this system Brush-Less DC motor control part Device monitors three motor position sensors, to provide the correct timing on top, lower part power MOS driving, there is six step of all-wave to drive Dynamic function, peripheral three-phase drive device are integrated metal-oxide-semiconductor, and upper power switch is PMOS tube, and lower part power switch is NMOS tube, Integrated chip has overcurrent protection function, and R118 resistance is current of electric sampling resistor, and current sampling signal is by R117, R119 Chip current sampling end is sent to after partial pressure, when current sampling signal value is greater than 0.1V, overcurrent protection function activation, motor stops turning Dynamic, overcurrent protection set-point is:
Icurrent=0.1* (R117+R119)/(R118*R119)
When overcurrent events occur, the output of driving chip Fault Output pin is low level, and motor driven is believed Number OutputEnable signal drags down, and motor shuts down, and avoids machine loading electric current excessive and electronic device damage occurs, When Fault Output is low level, the end the B-E voltage of triode Q24 is also reduced to zero, is switched to cut-off shape by state State, BLADE_FAULT signal are that high level stops all motor operations after MCU receives BLADE_FAULT high level immediately; In addition to this this, MCU is additionally provided with second level software overcurrent protection function, so as under different load conditions, flexible handling machine fortune Action is made, and machine frequent shutdown is avoided,
Software overcurrent protection function can be described as follows:
Current of electric sampled signal BLADE_P8, after 7.8 times of operational amplifier operation amplifier, by amplified sampling Current analog signal BLADE_CRT signal, which gives MCU, to be had on the pin of analog-digital conversion function, by built-in analog-to-digital conversion list After member processing, analog current signal is converted to 12 digital current signals, the overcurrent threshold signal phase that this signal is arranged with MCU Compare, when current signal value is greater than overcurrent threshold value, executes run action when corresponding overcurrent.
Left and right movable motor overcurrent protection function having the same, current operator amplifying circuit:
Current amplification factor Counting Formula:
A=1+ (R7/R14) * Icurrent
It is promoted when occurring unusual condition such as machine collision, machine in motor operation course, when machine is overturn, these things occurs Coherent signal is fed back to MCU by the perceptron of part, and MCU is immediately performed brake function,
Specific action process is as follows:
When location bias occurs for the Hall sensor for detecting the above event, hall signal is switched to low electricity by high level Flat, MCU pin is detected to level change, and the BLADE_BRK signal of sending is switched to low level by high level, and process is following Inverter cricuit processing after, generate BLADE_P4 high level signal and give motor drive ic U13, actuating motor brake function, it is left, Right lateral leakage of electricity machine function having the same;
Driving chip also makes motor forward/reverse function, when machine operation in collide event when, machine execute after Function is moved back, specific action description is as follows:
When collision alarm is sent to MCU by Hall sensor, MCU will control the BLADE_DIR's in motor operation direction Signal is switched to high level by low level, after the processing of following inverter cricuit, generates low level BLADE_P7 signal to electricity Machine driving chip U13, motor switch inverted status by rotating forward, and machine executes fall back movement,
Motor speed control principle:
For machine under different working conditions, motor operation speed is not also identical, it is therefore desirable to feed back the operation speed of motor Degree signal gives motor driven core U13, and this system design uses dedicated motor speed detection chip, to generate motor speed control Required feedback voltage, without expensive tachometer, this function is can be realized in U12;
It is described that the specific working principle is as follows:
Be motor driven chip U13 as electronics rotor position decoding Hall sensor output signal occur it is positive or negative Jump can make U12 generate the pulse of an amplitude and duration, and parameter is determined by non-essential resistance R101, C48, in U12 Pin 5 at output pulse by U13 error amplifier integrate, to generate a DC level, the level and motor speed Directly proportional, this velocity feedback voltage establishes PWM reference level at the pin 13 of U13, and is closed into feedback control loop, output driving The control signal of MOS, meanwhile, the PWM reference voltage at U13 pin 13 is fed back into the pin that MCU has analog-digital conversion function, So that MCU learns motor actual motion speed, and control voltage is adjusted according to the difference of actual motion velocity amplitude and setting value;
Interlock circuit is described as follows:
RMOT_DAC is that the target velocity of MCU output controls the voltage value, (amplification factor=1+ after operational amplifier amplifies R5/R12), send to the pin 11 of right movable motor driving chip, draw the difference of target velocity voltage Yu actual speed voltage After the amplification of chip interior error amplifier, the reference voltage signal RMOT_P6 that above-mentioned PWM is adjusted is exported at pin 13; Gear and noise elimination inner shaft is increased because wearing big, temperature, revolving speed is high, noise is big, protection must be handled due to be difficult to ensure longtime running after Reason, the gear shaft of retarder are tubuloses, retarder from gear drive inner shaft containing noise elimination (100a), so as to cooling of eliminating the noise;Subtract Fast device is to drive retarder with the air-cooled no planet rear axle of electric gear inner shaft, is empty containing being newly equipped with from gear shaft by motor Tubulose, described is logical, one end of one end three-way motor inside gear shaft energy high speed rotation, the inner via hole of one end Gas leads to one end up to ten thousand for turning high-speed motor, and the external energy of one end is rotatably provided with bearing and from tooth sleeve, described from gear Axis includes the noise elimination inner shaft, and the inner via hole for including the noise elimination inner shaft its other end from gear shaft leads to the outer of retarder Portion, is equipped with the noise elimination wedge of multiple hexagonal pyramid shapes in the noise elimination inner shaft contained by the gear shaft, in the noise elimination The noise elimination wedge for multiple hexagonal pyramid shapes that the hollow pipe of the inner shaft of one end of the close motor of axis is equipped be it is intensive, it is described The noise elimination wedge for multiple hexagonal pyramid shapes that the hollow pipe of the inner shaft of one end of the separate motor of noise elimination inner shaft is equipped with is sparse , the middle part of the noise elimination inner shaft is equipped with isolation interconnecting piece so that one end connects the one of the close motor of the slave gear shaft One end of the separate motor of slave gear shaft described in end and the connection of its other end, to make an uproar with reference to Lighthill parameter and Richards The air-flow that the motor of the turbulence noise of sound comes, one end close to motor port through compressing, reflation enters from gear shaft, then Multiple hexagonal pyramid shapes that the hollow pipe of the inner shaft of one end of close motor of the air-flow of expansion through the noise elimination inner shaft is equipped with Intensive noise elimination wedge recompression and pass through one end of the separate motor of noise elimination inner shaft after slightly run by noise elimination inner shaft again The sparse noise elimination wedge of multiple hexagonal pyramid shapes that is equipped with of hollow pipe of inner shaft second compression then spills into institute again again The inner via hole that the slave gear shaft stated includes the noise elimination inner shaft its other end leads to the outside of retarder, again with compression-expansion recompression Expand and carry out the process of noise elimination noise reduction;Also cooling convenient for outer blowing air;After blade and reducer gear and the protection of noise elimination inner shaft Handling its gear and noise elimination inner shaft containing blade and retarder is mostly metal parts, using kelvin effect, is carried out with high-frequency current Post-processing;Using single blade component, it can be realized three kinds of functions:When the practical mowing of grass trimmer, blade will not skid;Maximum output Torque is 11.87NM;When the practical mowing of grass trimmer, the condition that blade will not skid is:Slipping torque of the blade on tool apron is wanted Greater than the maximum output torque 11.87NM of engine;Slipping torque of the blade on tool apron can be measured by this method:It will Then blade fastening bolt is blocked engine flywheel with the torque locking of 45NM, then push blade with thrust meter, and record blade Skidding power;Blade slipping torque=skidding power x tests the arm of force;It is measured by the above method:Blade slipping torque=185* 0.205=37.9NM;Blade slipping torque is about 3 times of engine output torque;It ensure that grass trimmer mow normal or When high load capacity is mowed, blade will not lose the connection with tool apron, and blade will not skid;When the blade of grass trimmer knocks barrier When, blade can skid;When blade knocks the barriers such as stone, this is very big to the moment impact torque of blade, can be far longer than Blade slipping torque 37.9NM;Exactly because blade can be beaten on tool apron automatically at this point, this structure of single blade component designs It is sliding, to reduce shock to impact force caused by engine, avoid engine damage;After grass trimmer is mowed for a long time, set of blades The function of part will not fail;It looks up from undersurface of bottom disc, direction of rotation when blade work is counterclockwise, it is tight to tighten blade The direction of fixing bolt is clockwise;Such design ensure that grass trimmer in the process of work, blade fastening bolt Locking torque has the tendency that becoming larger;Locking torque without blade fastening bolt is smaller and smaller so that the feelings that blade loosens Condition;Grass trimmer is 48NM actually mowing using the torque for unscrewing blade fastening bolt after 20 hours, is measured;This numerical value, slightly Greater than the torque 45NM of blades fastening bolt;48NM this test data, real example grass trimmer in the process of work, knife The locking torque of piece fastening bolt has the tendency that becoming larger;This effect, it is ensured that after grass trimmer is mowed for a long time, blade assembly Function will not fail;There are two flanged structures on common its mounting plane of common tool apron.This structure does not have overload protection Function;When blade knocks the barriers such as stone, engine damage is easily led to;The single blade component had both been able to satisfy practical mowing Demand, and have the function of overload protection;It is subsequent, this blade assembly mechanism, it is contemplated that on the grass trimmer of other models It promotes the use of;Using kelvin effect, metal works are embedded in rare earth, are post-processed with high-frequency current;It is containing blade and subtracts The gear and noise elimination inner shaft of fast device are mostly metal parts, and using kelvin effect, workpiece is embedded in rare earth, is carried out with high-frequency current Post-processing, special efficacy is self-evident;Workpiece adds rhenium using titanizing aluminium, is placed on the molding containing yttrium oxide, rare earth, indium, clay In ceramics, be equipped with same position width penetrate and laser scanning and manufacture;Blade puts the first edge on a knife or a pair of scissors with carbon fiber 3 D-printing, then with diamond tool, The mixing for placing into nanoscale printing carbon dust, urea, borax, which is buried, to be heat-treated in soil and is used in combination with frequency-conversion electromagnetic field and laser scanning Platinum rhodium catalysis makes its space lattice dot matrix disperse;Blade fills knife blade at point of a knife position and is first put into nanoscale printing carbon The mixing of powder, urea, borax, which is buried, to be carried out carbon, nitrogen and boron and is heat-treated with frequency-conversion electromagnetic field permeation in soil;It is characterized in that, described cut Careless machine knife blade is multiple tooth hay knife, and the cross section of the apical tooth (25) of the multiple tooth hay knife is equipped with the bow stretched with steel plate punched Back, the steel plate of hunchbacked two sides has certain angle, the bottom of the back of a bow is polished to be formed grinds cutting edge (20), the side of the tooth While be the arc containing equiangular spiral, equiangular spiral be logatithmic spiral its with pressure angle equal characteristic everywhere;Steel plate stamping used It presses the upper die forming block (25a) of stretching die and lower die forming blocks (25b) is multiple equidistant or isogonism briquettings, steel plate used first moves back Fire quenches again;It is polygonal pyramid shape that the mower blade, which sets wind wing honeycomb (29), and it is oval that middle part, which is equipped with through-hole (30),; The blade of the mower blade sets graphene plating indium;The blade of the mower blade is handled with laser quenching;The wind wing The crest line of polygonal pyramid shape and the angle of bottom surface of honeycomb are greater than 115 degree of infiltrations and climb angle θ;Siphon is configured on the mower blade Pipe, to reinforce cooling and lubricating and the comprehensive effect to grass.Siphon pipe is configured on the mower blade of hay mower, To reinforce cooling and lubricating and the comprehensive effect to grass;Dimension containing growth is oozed in the siphon pipe configured on the mower blade The liquid of raw element, it is existing to mix broken careless supplementary feeding effect, and comfort and promoted to grow by chaffcutter wound;The mowing machine knife When piece high speed rotation, it is equipped in the ring week on the chassis of the blade of grass trimmer between more short soft mop cloth strips and lawn and is formed Air cushion makes knife wound less than grass roots;Grass trimmer front is equipped with bumper (109).
The beneficial effects of the invention are as follows:The multiple tooth length that blade is considerably increased than straight knife, there are more folding swords and there are many Impact cutting angle and slip cutting angle;Material to be cut is flexible, and when single-blade makes careless phenomenon more, and rolls over sword more then to hug careless function stronger, favorably Structure is ground in the hunchbacked formula bottom of enhancing cutting straw and straw efficiency, shear blade, so that it is had wearability and saves power consumption, it is described The side of tooth be the arc containing equiangular spiral, equiangular spiral be logatithmic spiral its with pressure angle equal characteristic is conducive to everywhere Cutting;The upper die forming block (25a) and lower die forming blocks (25b) of steel plate punched stretching die used are multiple equidistant or isogonism pressures Block is convenient for punching press;It is polygonal pyramid shape that the mower blade, which sets wind wing honeycomb (29), and it is ellipse that middle part, which is equipped with through-hole (30), Truly have noise reduction booster action;The blade of the mower blade sets graphene plating indium;The blade of the mower blade, which is used, to swash Photoquenching processing;The crest line of polygonal pyramid shape and the angle of bottom surface of the wind wing honeycomb are greater than 115 degree of infiltrations and climb angle θ;It is described Siphon pipe is configured on mower blade, to reinforce cooling and lubricating and the comprehensive effect to grass, improves product quality;It is described to cut The liquid of the vitamin containing growth is oozed in the siphon pipe configured on careless machine knife blade, it is existing to mix broken careless supplementary feeding effect, and comfort Promoted the effect of growth by chaffcutter wound;When the blade high speed rotation of the grass trimmer, the chassis and lawn of the blade of grass trimmer Between form air cushion, make knife wound less than grass roots;Grass trimmer front is equipped with bumper (109).
The power of common hay mower is used from the vertical cutter shaft for the engine being located in the middle part of hay mower Belt and belt pulley carry out primary transmission, and revolving speed is changed into 1500 turns every point from every point 3000, then carries out secondary transmission and guide to position In the retarder containing clutch of the driving rear axle at hay mower rear portion, the gear ratio of two stage reducer is up to 5, and revolving speed is from every point 1500 are changed into 300 turns every point of driving rear axle, then carry out three-level transmission, by the coaxial driving gear and lawn of driving rear axle Internal gear gear ring in the rear-wheel of grass trimmer is meshed, and because rear-wheel will adjust different mowing heights, therefore the axis of rear-wheel is in adjusting height It is upper and with driving rear axle cannot coaxial but two axis it is parallel, make hay mower it is maximum from walk speed substantially at one meter per second completely Sufficient customer requirement;But technical problem is limitation of the electricity consumption by power supply on hay mower, motor is according to there is brush Series-wound motor then has brush big to radio interference.Lithium battery group charging source is used on hay mower, motor is then It is to have certain improvement using brushless motor;But to pursue the output of small size height, the revolving speed of brushless motor is up to every point More than 20000 turns, be greatly more than ten times, this allows for electronic subtract relative to 1500 turns of every point of initial speed of original retarder The difficulty of fast device greatly increases, and to cost is reduced, reduces noise, forces down temperature rise, increases no-load voltage ratio and is proposed very high requirement.
With the garden equipment of electronic harmonic gear flexbile gear driven rear axle driving retarder, gear shaft is empty tubulose, Inside is logical so that outer blowing air is cooling;The harmonic gear flexbile gear driven rear axle drives retarder, using brushless motor 20,000 turns of every point of revolving speed, 250 watts of power, 36 volts, 5 millimeters of shaft diameter of output;The number of teeth of motor driving gear (88) is 18;It is described The motor gear of the number of teeth 18 of motor driving gear (88) and three each numbers of teeth 18, the not only rotation of modulus 0.6 but also around edge Planetary gear (98) engagement of the public axis revolution of motor axis, the planetary gear be attached separately to respectively and with public axis etc. Away from planet carrier (97) three planet wheel spindles on;The motor gear of the number of teeth 18 is steel 40Cr;The planetary gear (98) three planetary gears are polyformaldehyde;It is engaged with planetary gear and the internal tooth of the centre wheel of planetary system that geometrical axis is fixed Taking turns (99) is steel 40Ct, and modulus is 0.6, and the number of teeth is 60, and the classification of the Planetary Gear Transmission is NGW type, and N is internal messing Gear, G are the composite gears among two gear Meshing Pairs, and W is external gear pump;The transmission ratio of the Planetary Gear Transmission is 1+60/18 is 4.3, meets transmission ratio recommendation 2.7 to 9, and transmission efficiency is percent 97-99;The public affairs of the planet carrier (97) Axis centre projecting shaft be equipped with symmetrical two sectors be formed by fan groove, so as to the planet with motor coaxle Symmetrical two sectors that the public axis centre projecting shaft of frame output gear (96) is equipped be formed by it is fan-shaped it is convex come interworking It plugs together and is inserted into the inner ring of big bearing (105), the number of teeth of the planet carrier output gear (96) is that 26, modulus is 1.5, reference circle is 26x01.5=39;2812 Double-gears on the planet carrier output gear (96) and the first jackshaft (104) it be 1.5, reference circle is that 28 gears of 28x01.5=42 are meshed that the number of teeth, which is 28, modulus, on first jackshaft 28 gears (104a) and the planet carrier output gear (96) the number of teeth be 26 the planet carrier output gear (96) between The first jackshaft transmission ratio be 28/26 for 1.077;28 gears of 2812 Double-gear (104) containing the 28 coaxial numbers of teeth The both ends of 12 gears (104c) of (104a) and 12 numbers of teeth, 2812 Double-gear (104) are respectively provided with small bearing (103), described The outer diameter of small bearing (103) is 14mm, so as to the inner hole at the both ends with 2812 Double-gear (104), the small bearing (103) internal diameter be 5 so as to the first jackshaft activity assemble;Identical 2812 Double-gear of another structure (104) also 12 gears (104c) of 28 gears (104a) containing the 28 coaxial numbers of teeth and 12 numbers of teeth, on the second jackshaft, institute The both ends for stating 2812 Double-gears (104) are respectively provided with small bearing (103), and the outer diameter of the small bearing (103) is 14mm, so as to institute State the inner hole at the both ends of 2812 Double-gears (104), the internal diameter of the small bearing (103) be 5 so as to described second among Axis activity assembly;The 12 of coaxial 28 gears (104a) in 28 numbers of teeth of 2812 Double-gears (104) on first jackshaft 12 gears (104c) of the number of teeth, 2812 Double-gear identical with another structure on second jackshaft (104) also 28 gears (104a) containing the 28 coaxial numbers of teeth are meshed, 28 gears (104a) and institute on second jackshaft The the second axis transmission ratio stated between 12 gears (104c) of 12 numbers of teeth of 2812 Double-gears (104) on the first jackshaft is 28/ 12 be 2.33;2812 Double-gear (104) is containing 28 gears (104a) of the 28 coaxial numbers of teeth and 12 gears of 12 numbers of teeth (104c) is with polyformaldehyde machine-shaping in injection mold;The rear axle output par, c of the retarder is containing coaxial length half Rear axle and short half rear axle are sequentially arranged with rear axle driving reducing gearbox oil sealing on half rear axle of length, peace closes elastic clip (92), iron pad Circle, safety clutch bore (90), hang shelves disk (101), extension link stopper (91a) rear axle driving gear (91) is closed containing peace, pressing from both sides axis in long axis, institute It states long half rear axle and is equipped with radial cross-drilled hole will pass through lateral pin nail with safety clutch cone (90) and be connected, the peace closes elastic clip (92) the safety clutch cone (90) and the extension shelves disk (101), the safety clutch cone (90) and the extension shelves disk are sandwiched (101) it hangs link stopper (91a) rear axle driving gear (91) with described close containing peace and is connected, one end of half rear axle of length is equipped with axial deep Hole presss from both sides axis to be inserted into the long axis, is inserted into the axial deep hole that one end of short half rear axle is equipped with and makes the length half Rear axle and the short half rear axle activity are connected;Be sequentially arranged on short half rear axle rear axle driving retarder upper cover and oil sealing, It is successively filled with another set of peace to close elastic clip (92), iron washer, safety clutch cone (90), hang shelves disk (101), after described short half Radial cross-drilled hole also is provided on axis will pass through lateral pin nail with another set of safety clutch cone (90) and be connected, another set of is described Peace closes elastic clip (92) and sandwiches the safety clutch cone (90) and the extension shelves disk (101), described on short half rear axle Safety clutch bores (90) and the extension shelves disk (101) and also hangs the driving of link stopper (91a) rear axle with unique described close containing peace above-mentioned Gear (91) is connected;The number of teeth that extension link stopper (91a) rear axle driving gear (91) is closed containing peace is 33 teeth and modulus is 2.5;Institute It states 12 gears (104c) of 12 numbers of teeth of 28 gears (104a) on the second jackshaft and described on the rear axle closes containing peace and hang It is 2.75 that transfer rear axle transmission ratio between link stopper (91a) rear axle driving gear (91), which is 33/12,;Retarder resultant gear ratio is 4.3x33/12x28/12x28/26=4.3x6.9=30 again, sharing;It is characterized in that, the other end and the institute of half rear axle of length The other end for stating short half rear axle is respectively provided with laterally double groovings and laterally double groovings are driven with civilian dress rear wheel drive gear, the rear-wheel Moving gear is 14 tooth modules 2.5, and the rear-wheel gear ring with the rear wheel drive cartridge driving gear in hay mower rear-wheel (107), the number of teeth of the rear-wheel gear ring (107) is that 52 tooth modules 2.5 match small grass trimmer rear-wheel.
It is not at all easy to have innovated a kind of electricity consumption for not only having reached no-load voltage ratio but also meet heat dissipation for market multi-configuration item and designs and varieties The air-cooled no planet rear axle of moving gear inner shaft drives the gardens machine of retarder, and the axis in gear is pipe with cooling, containing no planet Rear axle drives retarder, and gear used is herringbone bear, and usefulness is self-evident.
With the gardens machine of the air-cooled no planet rear axle driving retarder of electric gear inner shaft, drives and slow down containing no planet rear axle Device is empty tubulose from gear shaft, inside be it is logical so that outer blowing air cools down, gear is herringbone bear,;Brushless electricity 250 watts of 20000 turns of every point of revolving speed, the power of machine, 36 volts, 5 millimeters of shaft diameter of output;The number of teeth 18 of motor driving gear (88), Modulus 0.6, reference circle are 18x0.6=10.8;Remove planetary gear train, the motor driving gear (88) and the motor that newly sets from Motor on moving axis is engaged from gear (106), and the motor from gear (106) is the number of teeth 38, modulus 0.6, reference circle are 38x0.6=22.8, motor driven ratio is 38/18;The motor matches out of gear with 14x5 bearing;The motor newly set Equipped with from tooth sleeve (100) and female connector gear (102) on driven shaft, the number of teeth of the female connector gear (102) be 12 and modulus be 1.5, the female connector gear is 28, modulus with the number of teeth as 2812 Double-gears (104) on output gear and the first jackshaft It is 1.5, reference circle is that 28 gears of 28x01.5=42 are meshed, the output gear and first of the motor driven axis newly set Jackshaft transmission ratio is 28/12;The above transmission ratio is 38/18x28/12=4.9, is more than planet no-load voltage ratio 4.33, actually shares;Its Remaining no-load voltage ratio is roughly the same;2812 Double-gear (104) is containing 28 gears (104a) of the 28 coaxial numbers of teeth and 12 teeth of 12 numbers of teeth It takes turns (104c), the both ends of 2812 Double-gear (104) are respectively provided with small bearing (103), and the outer diameter of the small bearing (103) is 14mm, so as to the inner hole at the both ends with 2812 Double-gear (104), the internal diameter of the small bearing (103) be 5 so as to The first jackshaft activity assembly;Identical 2812 Double-gear (104) of another structure is also containing the 28 coaxial numbers of teeth 12 gears (104c) of 28 gears (104a) and 12 numbers of teeth, on the second jackshaft, the both ends of 2812 Double-gear (104) It is respectively provided with small bearing (103), the outer diameter of the small bearing (103) is 14mm, so as to two with 2812 Double-gear (104) The inner hole at end, the internal diameter of the small bearing (103) be 5 so as to the second jackshaft activity assemble;In described first Between 2812 Double-gears (104) on axis coaxial 28 gears (104a) in 28 numbers of teeth 12 numbers of teeth 12 gears (104c) with Identical 2812 Double-gear (104) of another structure on second jackshaft also containing the 28 coaxial numbers of teeth 28 Gear (104a) is meshed, 28 gears (104a) on second jackshaft and 2812 Double-gears on first jackshaft (104) it is 2.33 that the second axis transmission ratio between 12 gears (104c) of 12 numbers of teeth, which is 28/12,;2812 Double-gear (104) 28 gears (104a) containing the 28 coaxial numbers of teeth and 12 gears (104c) of 12 numbers of teeth are with polyformaldehyde in injection mold In machine-shaping;The rear axle output par, c of the retarder is containing coaxial half rear axle of length and short half rear axle, after the length half Rear axle driving reducing gearbox oil sealing is sequentially arranged on axis, peace closes elastic clip (92), iron washer, safety clutch cone (90), hangs shelves disk (101), it closed containing peace and hangs link stopper (91a) rear axle driving gear (91), press from both sides axis in long axis, half rear axle of length is equipped with radial cross-drilled hole It is connected with will pass through lateral pin nail with safety clutch cone (90), the peace closes elastic clip (92) and sandwiches the safety clutch cone (90) and the extension shelves disk (101), the safety clutch bore (90) and the extension shelves disk (101) and the conjunction containing peace extension link stopper (91a) rear axle driving gear (91) is connected, and one end of half rear axle of length is equipped with axial deep hole, presss from both sides to be inserted into the long axis Axis is inserted into the axial deep hole that one end of short half rear axle is equipped with and makes half rear axle of length and the short half rear axle activity phase Connection;It is sequentially arranged with rear axle driving retarder upper cover and oil sealing on short half rear axle, is also successively filled with another set of peace conjunction elasticity It presss from both sides (92), iron washer, safety clutch cone (90), hang shelves disk (101), also be provided with radial cross-drilled hole on short half rear axle to lead to It crosses lateral pin nail to be connected with another set of safety clutch cone (90), another set of peace conjunction elastic clip (92) sandwiches described Safety clutch bores (90) and the extension shelves disk (101), safety clutch cone (90) and the extension shelves on short half rear axle Disk (101) also hangs link stopper (91a) rear axle driving gear (91) with unique conjunction containing peace above-mentioned and is connected;It is described to be closed containing peace The number of teeth for hanging link stopper (91a) rear axle driving gear (91) is 33 teeth and modulus is 2.5;28 gears on second jackshaft 12 gears (104c) of 12 numbers of teeth of (104a) and the conjunction containing peace on the rear axle hang link stopper (91a) rear axle and drive gear (91) it is 2.75 that the transfer rear axle transmission ratio between, which is 33/12,;Retarder resultant gear ratio is 4.3x33/12x28/12x28/26 =4.3x6.9=30 times, it shares;It is characterized in that, the number of teeth 18 of the motor driving gear (88), modulus 0.6, reference circle are The metal gear of 18x0.6=10.8, so as to general;Remove planetary gear train, motor motor driving gear (88) and newly set Motor on driven shaft is engaged from gear (106), and the motor from gear (106) is the number of teeth 38, modulus 0.6, reference circle are 38x0.6=22.8 metal gear, motor driven ratio is 38/18;The motor matches out of gear with 14x5 bearing;It is described The sipes hole (106a) that motor is equipped with the uniformly distributed quartering out of gear is inserted into allow from the four wide pawl of tooth sleeve (100), institute Narrow slot hole (106c) of the motor equipped with the uniformly distributed quartering out of gear is stated to insert to allow from four fan pawls of tooth sleeve (100) Enter, four fan pawls are conducive to radiate;The other end from tooth sleeve (100) set there are four pusher dog so as to it is described new If motor driven axis on the female connector gear (102) that is equipped with mutually be formulated, the number of teeth of the female connector gear (102) is 12 and mould Number is 1.5, and the small bearing (103) is equipped in the female connector gear (102), interior to be inserted into the motor driven axis newly set;It is described from The outside of tooth sleeve (100) is equipped with big bearing, and the big bearing is located on reducing gearbox;It is filled on the motor driven axis newly set Have from tooth sleeve (100) and female connector gear (102), the number of teeth of the female connector gear (102) be 12 and modulus be 1.5, the length The other end of the other end of half rear axle and short half rear axle is respectively provided with laterally double groovings and lateral double groovings with civilian dress rear-wheel Gear is driven, the rear wheel drive gear is 14 tooth modules 2.5, and with the rear wheel drive cartridge driving gear in hay mower Rear-wheel gear ring (107) in rear-wheel, the number of teeth of the rear-wheel gear ring (107) are that 82 tooth modules 2.5 match big grass trimmer rear-wheel;It is described It is greater than 90 degree from the impeller Ye Dao exit blade angle of the fan of each fan pawl of tooth sleeve (100), is Forword vane Impeller fan.
Gardens machine drives retarder without planet rear axle with electronic crossed helical gears, and gear shaft is empty tubulose, interior Portion is logical so that outer blowing air is cooling;Using brushless motor, from the impeller leaf of the fan of each fan pawl of tooth sleeve (100) Road exit blade angle is greater than 90 degree, is the fan of the impeller of Forword vane.Axis in gear is empty with cooling;Gardens Machine is conducive to become using former widely used crossed helical gears with electronic crossed helical gears without planet rear axle driving retarder Fast case, only the former engine belt pulley of importation remove and be changed to motor and gear come power go driving alternating axis Helical gear and rear axle;Using 20000 turns of brushless motor speed, 250 watts of power, 36 volts, 5 millimeters of shaft diameter of output;Motor is actively The number of teeth of gear (88) is 18;What is be socketed outside the motor gear of the number of teeth 18 of the motor driving gear (88) is still output For 26 gears of gear (96) in order to transmit, the number of teeth with 2812 Double-gears (104) on the first jackshaft is that 28, modulus is 1.5, reference circle is that 28 gears of 28x01.5=42 are meshed, 28 gears (104a) and output gear on first jackshaft The number of teeth of wheel (96) is that the first transmission ratio between the 26 planet carrier output gear (96) is 28/26 for 1.07;It is described 12 gears (104c) of 28 gears (104a) and 12 numbers of teeth of 2812 Double-gears (104) containing the 28 coaxial numbers of teeth, described 2812 pairs The both ends of gear (104) are respectively provided with small bearing (103), and the outer diameter of the small bearing (103) is 14mm, so as to described 2812 The inner hole at the both ends of Double-gear (104), the internal diameter of the small bearing (103) are 5 so as to movable with first jackshaft Assembly;Identical 2812 Double-gear (104) of another structure is also containing 28 gears (104a) of the 28 coaxial numbers of teeth and 12 teeth Several 12 gears (104c), on the second jackshaft, the both ends of 2812 Double-gear (104) are respectively provided with small bearing (103) , the outer diameter of the small bearing (103) is 14mm, described small so as to the inner hole at the both ends with 2812 Double-gear (104) The internal diameter of bearing (103) be 5 so as to the second jackshaft activity assemble;2812 Double-gears on first jackshaft (104) 12 gears (104c) of 12 numbers of teeth of coaxial 28 gears (104a) in 28 numbers of teeth and the institute on second jackshaft Stating identical 2812 Double-gear (104) of another structure, also 28 gears (104a) containing the 28 coaxial numbers of teeth are meshed, institute State the 12 of 12 numbers of teeth of 2812 Double-gears (104) on 28 gears (104a) and first jackshaft on the second jackshaft It is 2.33 that the second axis transmission ratio between gear (104c), which is 28/12,;2812 Double-gear (104) is containing the 28 coaxial numbers of teeth 28 gears (104a) and 12 gears (104c) of 12 numbers of teeth be with polyformaldehyde machine-shaping in injection mold;Described subtracts The rear axle output par, c of fast device is sequentially arranged with rear axle driving and subtracts containing coaxial half rear axle of length and short half rear axle on half rear axle of length Fast device shell oil sealing, peace close elastic clip (92), iron washer, safety clutch cone (90), hang shelves disk (101), close containing peace and hang link stopper (91a) Axis is pressed from both sides in rear axle driving gear (91), long axis, half rear axle of length is equipped with radial cross-drilled hole will pass through lateral pin nail and the peace Full clutch cone (90) is connected, and the peace closes elastic clip (92) and sandwiches the safety clutch cone (90) and the extension shelves disk (101), The safety clutch cone (90) and the extension shelves disk (101) hang link stopper (91a) rear axle with the conjunction containing peace and drive gear (91) phase Connection, one end of half rear axle of length are equipped with axial deep hole, press from both sides axis to be inserted into the long axis, be inserted into one end of short half rear axle Half rear axle of length and the short half rear axle activity is set to be connected in the axial deep hole being equipped with;It is successively filled on short half rear axle There are rear axle driving retarder upper cover and oil sealing, be also successively filled with another set of peace conjunction elastic clip (92), iron washer, safety clutch cone (90), shelves disk (101) are hung, also is provided with radial cross-drilled hole on short half rear axle will pass through lateral pin nail and the another set of safety Clutch bores (90) and is connected, and the another set of peace closes elastic clip (92) and sandwiches the safety clutch cone (90) and the extension shelves disk (101), on short half rear axle the safety clutch cone (90) and the extensions shelves disk (101) also with it is above-mentioned uniquely described in Extension link stopper (91a) rear axle driving gear (91) is closed containing peace to be connected;The gardens machine with electronic crossed helical gears without planet after Axis drives retarder, which is characterized in that removes planetary system and is driven with staggered gear, described close containing peace on rear axle hangs link stopper Staggeredly helical gear is used in (91a) rear axle driving gear (91) instead, and helix angle is 27 degree;28 gears on second jackshaft 12 gears (104c) of (104a) use screw rod instead, on the rear axle described in use transfer rear axle between staggeredly helical gear instead Three transmission ratios are 5;So resultant gear ratio is 5x28/26x28/12x28/12=30, share just;Half rear axle of length it is another The other end of one end and short half rear axle is respectively provided with laterally double groovings and lateral double groovings with civilian dress rear wheel drive gear, institute State rear wheel drive gear be 14 tooth modules 2.5, and with the rear wheel drive cartridge driving gear in hay mower rear-wheel after It takes turns gear ring (107), the number of teeth of the rear-wheel gear ring (107) is that 52 tooth modules 2.5 match small grass trimmer rear-wheel;
The motor of retarder is equipped with circuit for controlling motor;Motor control part principle:
Integrated chip control program, the decoding of built-in chip type rotor-position are purchased in this system Brush-Less DC motor control part Device monitors three motor position sensors, to provide the correct timing on top, lower part power MOS driving, there is six step of all-wave to drive Dynamic function, peripheral three-phase drive device are integrated metal-oxide-semiconductor, and upper power switch is PMOS tube, and lower part power switch is NMOS tube, Integrated chip has overcurrent protection function, and R118 resistance is current of electric sampling resistor, and current sampling signal is by R117, R119 Chip current sampling end is sent to after partial pressure, when current sampling signal value is greater than 0.1V, overcurrent protection function activation, motor stops turning Dynamic, overcurrent protection set-point is:Icurrent=0.1* (R117+R119)/(R118*R119) drives when overcurrent events occur The output of dynamic chip Fault Output pin is low level, motor drive signal OutputEnable signal is dragged down, motor It shuts down, avoids machine loading electric current excessive and electronic device damage occurs, when Fault Output is low level, three poles The end the B-E voltage of pipe Q24 is also reduced to zero, is switched to off state by state, and BLADE_FAULT signal is high level, when After MCU receives BLADE_FAULT high level, stop all motor operations immediately;In addition to this this, MCU is additionally provided with second level software Overcurrent protection function, so that under different load conditions, flexible handling machine run action avoids machine frequent shutdown,
Software overcurrent protection function can be described as follows:
Current of electric sampled signal BLADE_P8, after 7.8 times of operational amplifier operation amplifier, by amplified sampling Current analog signal BLADE_CRT signal, which gives MCU, to be had on the pin of analog-digital conversion function, by built-in analog-to-digital conversion list After member processing, analog current signal is converted to 12 digital current signals, the overcurrent threshold signal phase that this signal is arranged with MCU Compare, when current signal value is greater than overcurrent threshold value, executes run action when corresponding overcurrent;
Left and right movable motor overcurrent protection function having the same, current operator amplifying circuit:
Current amplification factor Counting Formula:
A=1+ (R7/R14) * Icurrent
It is promoted when occurring unusual condition such as machine collision, machine in motor operation course, when machine is overturn, these things occurs Coherent signal is fed back to MCU by the perceptron of part, and MCU is immediately performed brake function,
Specific action process is as follows:
When location bias occurs for the Hall sensor for detecting the above event, hall signal is switched to low electricity by high level Flat, MCU pin is detected to level change, and the BLADE_BRK signal of sending is switched to low level by high level, and process is following Inverter cricuit processing after, generate BLADE_P4 high level signal and give motor drive ic U13, actuating motor brake function, it is left, Right lateral leakage of electricity machine function having the same;
Driving chip also makes motor forward/reverse function, when machine operation in collide event when, machine execute after Function is moved back, specific action description is as follows:
When collision alarm is sent to MCU by Hall sensor, MCU will control the BLADE_DIR's in motor operation direction Signal is switched to high level by low level, after the processing of following inverter cricuit, generates low level BLADE_P7 signal to electricity Machine driving chip U13, motor switch inverted status by rotating forward, and machine executes fall back movement,
Left and right movable motor function having the same;
Motor speed control principle:
For machine under different working conditions, motor operation speed is not also identical, it is therefore desirable to feed back the operation speed of motor Degree signal gives motor driven core U13, and this system design uses dedicated motor speed detection chip, to generate motor speed control Required feedback voltage, without expensive tachometer, this function is can be realized in U12;
It is described that the specific working principle is as follows:
Be motor driven chip U13 as electronics rotor position decoding Hall sensor output signal occur it is positive or negative Jump can make U12 generate the pulse of an amplitude and duration, and parameter is determined by non-essential resistance R101, C48, in U12 Pin 5 at output pulse by U13 error amplifier integrate, to generate a DC level, the level and motor speed Directly proportional, this velocity feedback voltage establishes PWM reference level at the pin 13 of U13, and is closed into feedback control loop, output driving The control signal of MOS, meanwhile, the PWM reference voltage at U13 pin 13 is fed back into the pin that MCU has analog-digital conversion function, So that MCU learns motor actual motion speed, and control voltage is adjusted according to the difference of actual motion velocity amplitude and setting value;
Interlock circuit is described as follows:
RMOT_DAC is that the target velocity of MCU output controls the voltage value, (amplification factor=1+ after operational amplifier amplifies R5/R12), send to the pin 11 of right movable motor driving chip, draw the difference of target velocity voltage Yu actual speed voltage After the amplification of chip interior error amplifier, the reference voltage signal RMOT_P6 that above-mentioned PWM is adjusted is exported at pin 13.
Gardens intelligent grass-removing four planetary gear rear-guard moving gear box of three-level, which is characterized in that it is hay mower With four planetary gear meshing gear reduction gearbox (108) of three-level, brushless motor, 20000 turns of revolving speed, 150 watts of power, 36 are used Volt, 5 millimeters of shaft diameter of output, there is speed control circuit;The number of teeth of motor driving gear (88) is 20;The motor driving gear (88) four planetary gears (98) on the motor gear of the number of teeth 20, with the first order planet carrier of third-level planetary system are nibbled Transmission is closed, the gear uses helical gear, and helix angle is 12.7 degree;Four each numbers of teeth 19, modulus 0.6 both from Turn to be attached separately to around the planetary gear (98) of the public axis revolution along motor axis again respectively and the planet equidistant with public axis On four planet wheel spindles of frame (97);The motor gear of the number of teeth 20 is steel 40Cr;Four of the planetary gear (98) Planetary gear is polyformaldehyde SP500;It is engaged with planetary gear and the internal gear of the centre wheel of planetary system that geometrical axis is fixed It (99) is steel 40Cr, modulus is 0.6, and the number of teeth is 60, and the classification of the Planetary Gear Transmission is NGW type, and N is internal messing tooth Wheel, G is the composite gear among two gear Meshing Pairs, and W is external gear pump;The transmission ratio of the Planetary Gear Transmission is 1+ 60/20 is 4, meets transmission ratio recommendation 2.7 to 9, and transmission efficiency is percent 97-99;In on the first order planet carrier Four planetary gears (98) engaged transmission on heart output gear and second level planet carrier, the gear use helical gear, spiral shell Revolve lift angle be 12.7 degree, each number of teeth 19 of four of the second level, modulus 0.6 not only rotation again around along motor axis public axis public affairs The planetary gear (98) turned, be attached separately to respectively and on four planet wheel spindles of the planet carrier (97) equidistant with public axis;Institute Stating the center output gear on first order planet carrier is steel 40Cr, four planetary gears (98) on the planet carrier of the second level Four planetary gears are polyformaldehyde SP500;It is engaged with planetary gear and the internal tooth of the centre wheel of planetary system that geometrical axis is fixed Taking turns (99) is steel 40Cr, and modulus is 0.6, and the number of teeth is 60, and the classification of the Planetary Gear Transmission is also NGW type, and N is interior nibbles Gear is closed, G is the composite gear among two gear Meshing Pairs, and W is external gear pump;The Planetary Gear Transmission of the second level Transmission ratio be 1+60/19 be 3.16;Three on center output gear and third level planet carrier on the second level planet carrier A planetary gear (98) engaged transmission, the gear use helical gear, and helix angle is 12.7 degree, and three of the third level are each The number of teeth 18, modulus 0.6 not only rotation but also around along motor axis public axis revolution planetary gear (98), be attached separately to respectively And with public axis on three planet wheel spindles of equidistant planet carrier (97);Center output gear on the second level planet carrier It is steel 40Cr, three planetary gears of the number of teeth 18, modulus 0.6, three planetary gears (98) on the planet carrier of the third level are not Polyformaldehyde SP500's but steel 40Cr;It is engaged with planetary gear and the internal gear of the centre wheel of planetary system that geometrical axis is fixed It (99) is steel 40Cr, modulus is 0.6, and the number of teeth is 60, and the classification of the Planetary Gear Transmission is also NGW type, and N is internal messing tooth Wheel, G is the composite gear among two gear Meshing Pairs, and W is external gear pump;The Planetary Gear Transmission of the third level Transmission ratio is that 1+60/18 is 4.33;Above three-level resultant gear ratio is 4x3.16x4.33=55 times, 20000 turns/55=of revolving speed 360, it is furnished with speed control circuit, shares;
Cutter blade for mowing machine and reducer gear and the protection post-processing of noise elimination inner shaft, gear containing blade and retarder and Noise elimination inner shaft and protection post-processing, the gear shaft of retarder are tubulose and retarder from gear drive inner shaft containing noise elimination (100a), so as to cooling of eliminating the noise;Retarder is to drive retarder with the air-cooled no planet rear axle of electric gear inner shaft, containing electronic Newly being equipped with by machine from gear shaft is empty tubulose, and inside is logical so that outer blowing air is cooling, and gear is herringbone bear; 250 watts of 20000 turns of every point of revolving speed, the power of brushless motor, 36 volts, 5 millimeters of shaft diameter of output;The tooth of motor driving gear (88) Number 18, modulus 0.6, reference circle are 18x0.6=10.8;Remove planetary gear train, the motor driving gear (88) with newly set Motor on motor driven axis is engaged from gear (106), and the motor is the number of teeth 38, modulus 0.6, reference circle from gear (106) It is 38x0.6=22.8, motor driven ratio is 38/18;The motor matches out of gear with 14x5 bearing;The horse newly set Equipped with from tooth sleeve (100) and female connector gear (102) on up to driven shaft, the number of teeth of the female connector gear (102) is 12 and modulus It is 1.5, the female connector gear is 28, mould with the number of teeth as 2812 Double-gears (104) on output gear and the first jackshaft Number is that 1.5, reference circle is that 28 gears of 28x01.5=42 are meshed, the output gear of the motor driven axis newly set and One jackshaft transmission ratio is 28/12;The above transmission ratio is 38/18x28/12=4.9, is more than planet no-load voltage ratio 4.33, actually shares; Remaining no-load voltage ratio is roughly the same;The 12 of 28 gears (104a) and 12 numbers of teeth of 2812 Double-gear (104) containing the 28 coaxial numbers of teeth The both ends of gear (104c), 2812 Double-gear (104) are respectively provided with small bearing (103), the outer diameter of the small bearing (103) 14mm, so as to the inner hole at the both ends with 2812 Double-gear (104), the internal diameter of the small bearing (103) be 5 so as to It is assembled with the first jackshaft activity;Identical 2812 Double-gear (104) of another structure is also containing the 28 coaxial numbers of teeth 28 gears (104a) and 12 numbers of teeth 12 gears (104c), on the second jackshaft, the two of 2812 Double-gear (104) End be respectively provided with small bearing (103), the outer diameter of the small bearing (103) is 14mm, so as to 2812 Double-gear (104) The inner hole at both ends, the internal diameter of the small bearing (103) be 5 so as to the second jackshaft activity assemble;Described first 12 gears (104c) of 12 numbers of teeth of coaxial 28 gears (104a) in 28 numbers of teeth of 2812 Double-gears (104) on jackshaft 2812 Double-gear (104) identical with another structure on second jackshaft is also containing the 28 coaxial numbers of teeth 28 gears (104a) are meshed, 28 gears (104a) on second jackshaft and 2812 bidentates on first jackshaft It is 2.33 that the second axis transmission ratio between 12 gears (104c) of 12 numbers of teeth of wheel (104), which is 28/12,;2812 Double-gear (104) 28 gears (104a) containing the 28 coaxial numbers of teeth and 12 gears (104c) of 12 numbers of teeth are with polyformaldehyde in injection mold In machine-shaping;The rear axle output par, c of the retarder is containing coaxial half rear axle of length and short half rear axle, after the length half Rear axle driving reducing gearbox oil sealing is sequentially arranged on axis, peace closes elastic clip (92), iron washer, safety clutch cone (90), hangs shelves disk (101), it closed containing peace and hangs link stopper (91a) rear axle driving gear (91), press from both sides axis in long axis, half rear axle of length is equipped with radial cross-drilled hole It is connected with will pass through lateral pin nail with safety clutch cone (90), the peace closes elastic clip (92) and sandwiches the safety clutch cone (90) and the extension shelves disk (101), the safety clutch bore (90) and the extension shelves disk (101) and the conjunction containing peace extension link stopper (91a) rear axle driving gear (91) is connected, and one end of half rear axle of length is equipped with axial deep hole, presss from both sides to be inserted into the long axis Axis is inserted into the axial deep hole that one end of short half rear axle is equipped with and makes half rear axle of length and the short half rear axle activity phase Connection;It is sequentially arranged with rear axle driving retarder upper cover and oil sealing on short half rear axle, is also successively filled with another set of peace conjunction elasticity It presss from both sides (92), iron washer, safety clutch cone (90), hang shelves disk (101), also be provided with radial cross-drilled hole on short half rear axle to lead to It crosses lateral pin nail to be connected with another set of safety clutch cone (90), another set of peace conjunction elastic clip (92) sandwiches described Safety clutch bores (90) and the extension shelves disk (101), safety clutch cone (90) and the extension shelves on short half rear axle Disk (101) also hangs link stopper (91a) rear axle driving gear (91) with unique conjunction containing peace above-mentioned and is connected;It is described to be closed containing peace The number of teeth for hanging link stopper (91a) rear axle driving gear (91) is 33 teeth and modulus is 2.5;28 gears on second jackshaft 12 gears (104c) of 12 numbers of teeth of (104a) and the conjunction containing peace on the rear axle hang link stopper (91a) rear axle and drive gear (91) it is 2.75 that the transfer rear axle transmission ratio between, which is 33/12,;Retarder resultant gear ratio is 4.3x33/12x28/12x28/26 =4.3x6.9=30 times, it shares;It is characterized in that, the number of teeth 18 of the motor driving gear (88), modulus 0.6, reference circle are The metal gear of 18x0.6=10.8, so as to general;Remove planetary gear train, motor motor driving gear (88) and newly set Motor on driven shaft is engaged from gear (106), and the motor from gear (106) is the number of teeth 38, modulus 0.6, reference circle are 38x0.6=22.8 metal gear, motor driven ratio is 38/18;The motor matches out of gear with 14x5 bearing;It is described The sipes hole (106a) that motor is equipped with the uniformly distributed quartering out of gear is inserted into allow from the four wide pawl of tooth sleeve (100), institute Narrow slot hole (106c) of the motor equipped with the uniformly distributed quartering out of gear is stated to insert to allow from four fan pawls of tooth sleeve (100) Enter, four fan pawls are conducive to radiate;The other end from tooth sleeve (100) set there are four pusher dog so as to it is described new If motor driven axis on the female connector gear (102) that is equipped with mutually be formulated, the number of teeth of the female connector gear (102) is 12 and mould Number is 1.5, and the small bearing (103) is equipped in the female connector gear (102), interior to be inserted into the motor driven axis newly set;It is described from The outside of tooth sleeve (100) is equipped with big bearing, and the big bearing is located on reducing gearbox;It is filled on the motor driven axis newly set Have from tooth sleeve (100) and female connector gear (102), the number of teeth of the female connector gear (102) be 12 and modulus be 1.5, the length The other end of the other end of half rear axle and short half rear axle is respectively provided with laterally double groovings and lateral double groovings with civilian dress rear-wheel Gear is driven, the rear wheel drive gear is 14 tooth modules 2.5, and with the rear wheel drive cartridge driving gear in hay mower Rear-wheel gear ring (107) in rear-wheel, the number of teeth of the rear-wheel gear ring (107) are that 82 tooth modules 2.5 match big grass trimmer rear-wheel;It is described It is greater than 90 degree from the impeller Ye Dao exit blade angle of the fan of each fan pawl of tooth sleeve (100), is Forword vane Impeller fan;
The motor of retarder is equipped with circuit for controlling motor;Motor control part principle:
Integrated chip control program, the decoding of built-in chip type rotor-position are purchased in this system Brush-Less DC motor control part Device monitors three motor position sensors, to provide the correct timing on top, lower part power MOS driving, there is six step of all-wave to drive Dynamic function, peripheral three-phase drive device are integrated metal-oxide-semiconductor, and upper power switch is PMOS tube, and lower part power switch is NMOS tube, Integrated chip has overcurrent protection function, and R118 resistance is current of electric sampling resistor, and current sampling signal is by R117, R119 Chip current sampling end is sent to after partial pressure, when current sampling signal value is greater than 0.1V, overcurrent protection function activation, motor stops turning Dynamic, overcurrent protection set-point is:
Icurrent=0.1* (R117+R119)/(R118*R119)
When overcurrent events occur, the output of driving chip Fault Output pin is low level, and motor driven is believed Number OutputEnable signal drags down, and motor shuts down, and avoids machine loading electric current excessive and electronic device damage occurs, When Fault Output is low level, the end the B-E voltage of triode Q24 is also reduced to zero, is switched to cut-off shape by state State, BLADE_FAULT signal are that high level stops all motor operations after MCU receives BLADE_FAULT high level immediately; In addition to this this, MCU is additionally provided with second level software overcurrent protection function, so as under different load conditions, flexible handling machine fortune Action is made, and machine frequent shutdown is avoided,
Software overcurrent protection function can be described as follows:
Current of electric sampled signal BLADE_P8, after 7.8 times of operational amplifier operation amplifier, by amplified sampling Current analog signal BLADE_CRT signal, which gives MCU, to be had on the pin of analog-digital conversion function, by built-in analog-to-digital conversion list After member processing, analog current signal is converted to 12 digital current signals, the overcurrent threshold signal phase that this signal is arranged with MCU Compare, when current signal value is greater than overcurrent threshold value, executes run action when corresponding overcurrent.
Left and right movable motor overcurrent protection function having the same, current operator amplifying circuit:
Current amplification factor Counting Formula:
A=1+ (R7/R14) * Icurrent
It is promoted when occurring unusual condition such as machine collision, machine in motor operation course, when machine is overturn, these things occurs Coherent signal is fed back to MCU by the perceptron of part, and MCU is immediately performed brake function,
Specific action process is as follows:
When location bias occurs for the Hall sensor for detecting the above event, hall signal is switched to low electricity by high level Flat, MCU pin is detected to level change, and the BLADE_BRK signal of sending is switched to low level by high level, and process is following Inverter cricuit processing after, generate BLADE_P4 high level signal and give motor drive ic U13, actuating motor brake function, it is left, Right lateral leakage of electricity machine function having the same;
Driving chip also makes motor forward/reverse function, when machine operation in collide event when, machine execute after Function is moved back, specific action description is as follows:
When collision alarm is sent to MCU by Hall sensor, MCU will control the BLADE_DIR's in motor operation direction Signal is switched to high level by low level, after the processing of following inverter cricuit, generates low level BLADE_P7 signal to electricity Machine driving chip U13, motor switch inverted status by rotating forward, and machine executes fall back movement,
Motor speed control principle:
For machine under different working conditions, motor operation speed is not also identical, it is therefore desirable to feed back the operation speed of motor Degree signal gives motor driven core U13, and this system design uses dedicated motor speed detection chip, to generate motor speed control This function can be realized without expensive tachometer U12 in required feedback voltage;
It is described that the specific working principle is as follows:
Be motor driven chip U13 as electronics rotor position decoding Hall sensor output signal occur it is positive or negative Jump can make U12 generate the pulse of an amplitude and duration, and parameter is determined by non-essential resistance R101, C48, in U12 Pin 5 at output pulse by U13 error amplifier integrate, to generate a DC level, the level and motor speed Directly proportional, this velocity feedback voltage establishes PWM reference level at the pin 13 of U13, and is closed into feedback control loop, output driving The control signal of MOS, meanwhile, the PWM reference voltage at U13 pin 13 is fed back into the pin that MCU has analog-digital conversion function, So that MCU learns motor actual motion speed, and control voltage is adjusted according to the difference of actual motion velocity amplitude and setting value;
Interlock circuit is described as follows:
RMOT_DAC is that the target velocity of MCU output controls the voltage value, (amplification factor=1+ after operational amplifier amplifies R5/R12), send to the pin 11 of right movable motor driving chip, draw the difference of target velocity voltage Yu actual speed voltage After the amplification of chip interior error amplifier, the reference voltage signal RMOT_P6 that above-mentioned PWM is adjusted is exported at pin 13; The cutter blade for mowing machine and reducer gear and the protection post-processing of noise elimination inner shaft, which is characterized in that it contains blade and deceleration The gear of device and noise elimination inner shaft is increased because wearing big, temperature, revolving speed is high, noise is big, protection must be handled due to be difficult to ensure longtime running after Processing, the gear shaft of retarder are tubuloses, retarder from gear drive inner shaft containing noise elimination (100a), so as to cooling of eliminating the noise; Retarder is with the air-cooled no planet rear axle driving retarder of electric gear inner shaft, and new be equipped with from gear shaft in the side containing motor is empty Tubulose, described be logical, one end of one end three-way motor, the inner via hole of one end inside gear shaft energy high speed rotation Gas lead to one end up to ten thousand for turning high-speed motor, the external energy of one end is rotatably provided with bearing and from tooth sleeve, described from tooth Wheel shaft includes the noise elimination inner shaft, and the inner via hole for including the noise elimination inner shaft its other end from gear shaft leads to retarder Outside is equipped with the noise elimination wedge of multiple hexagonal pyramid shapes, the noise elimination in the noise elimination inner shaft contained by the gear shaft The noise elimination wedge for multiple hexagonal pyramid shapes that the hollow pipe of the inner shaft of one end of the close motor of inner shaft is equipped with is intensive, institute It is dilute for stating the noise elimination wedge for multiple hexagonal pyramid shapes that the hollow pipe of the inner shaft of one end of the separate motor of noise elimination inner shaft is equipped with Thin, the middle part of the noise elimination inner shaft is equipped with isolation interconnecting piece so that one end connects the close motor of the slave gear shaft One end of the separate motor of slave gear shaft described in one end and the connection of its other end, to refer to Lighthill parameter and Richards The air-flow that the motor of the turbulence noise of noise comes, one end close to motor port through compressing, reflation enters from gear shaft, Multiple hexagonal pyramids that the hollow pipe of the inner shaft of one end of close motor of the air-flow of reflation through the noise elimination inner shaft is equipped with The intensive noise elimination wedge of shape recompresses and passes through after noise elimination inner shaft is slightly run again by the one of the separate motor of noise elimination inner shaft Second compression is then spilt into the sparse noise elimination wedge for multiple hexagonal pyramid shapes that the hollow pipe of the inner shaft at end is equipped with again again The inner via hole that the slave gear shaft includes the noise elimination inner shaft its other end leads to the outside of retarder, is recompressed with compression-expansion Reflation and the process for carrying out noise elimination noise reduction;Also cooling convenient for outer blowing air;Blade and reducer gear and the protection of noise elimination inner shaft Post-processing its gear and noise elimination inner shaft containing blade and retarder is mostly metal parts, using kelvin effect, with high-frequency current into Row post-processing;Using single blade component, it can be realized three kinds of functions:1, when the practical mowing of grass trimmer, blade will not skid;It is maximum Output torque is 11.87NM;When the practical mowing of grass trimmer, the condition that blade will not skid is:Skidding power of the blade on tool apron Square is greater than the maximum output torque 11.87NM of engine;Slipping torque of the blade on tool apron can be surveyed by this method ?:By blade fastening bolt with the torque locking of 45NM, then engine flywheel is blocked, then pushes blade with thrust meter, and remember Record the skidding power of blade;Blade slipping torque=skidding power x tests the arm of force;It is measured by the above method:Blade slipping torque= 185*0.205=37.9NM;Blade slipping torque is about 3 times of engine output torque;It ensure that grass trimmer is normally being cut When grass or high load capacity are mowed, blade will not lose the connection with tool apron, and blade will not skid;2, when the blade of grass trimmer knocks barrier When hindering object, blade can skid;When blade knocks the barriers such as stone, this is very big to the moment impact torque of blade, can much Greater than blade slipping torque 37.9NM;Exactly because blade can be automatically in tool apron at this point, this structure of single blade component designs Upper skidding avoids engine damage to reduce shock to impact force caused by engine;3, after grass trimmer is mowed for a long time, The function of blade assembly will not fail;It looks up from undersurface of bottom disc, direction of rotation when blade work is counterclockwise, to tighten The direction of blade fastening bolt is clockwise;Such design ensure that grass trimmer in the process of work, blade fastening The locking torque of bolt has the tendency that becoming larger;Locking torque without blade fastening bolt is smaller and smaller so that blade is loose De- situation;Grass trimmer is 48NM actually mowing using the torque for unscrewing blade fastening bolt after 20 hours, is measured;This number Value, slightly larger than the torque 45NM of blades fastening bolt;This test data of 48NM, real example process of the grass trimmer in work In, the locking torque of blade fastening bolt has the tendency that becoming larger;This effect, it is ensured that after grass trimmer is mowed for a long time, blade The function of component will not fail;There are two flanged structures on common its mounting plane of common tool apron.This structure, did not had Carry defencive function;When blade knocks the barriers such as stone, engine damage is easily led to;The single blade component is both able to satisfy reality The demand that border is mowed, and have the function of overload protection;Subsequent, this blade assembly mechanism can be in the grass trimmer of other models Upper popularization and use;Using kelvin effect, metal works are embedded in rare earth, are post-processed with high-frequency current;Its containing blade and The gear and noise elimination inner shaft of retarder are mostly metal parts, and using kelvin effect, workpiece is embedded in rare earth, with high-frequency current into Row post-processing, special efficacy is self-evident;Workpiece adds rhenium using titanizing aluminium, be placed on containing yttrium oxide, rare earth, indium, clay at Type ceramics in, be equipped with same position width penetrate and laser scanning and manufacture;Blade uses carbon fiber 3 D-printing, then is opened with diamond tool Sword, the mixing for placing into printing carbon dust, urea, borax bury in soil heat treatment and with frequency-conversion electromagnetic field and laser scanning and with platinum rhodium Catalysis, makes its space lattice dot matrix disperse.Blade fills knife blade at point of a knife position and is first put into nanoscale printing carbon dust, urine The mixing of element, borax, which is buried, to be carried out carbon, nitrogen and boron and is heat-treated with frequency-conversion electromagnetic field permeation in soil;It is characterized in that, the mowing machine knife Piece is multiple tooth hay knife, and the cross section of the apical tooth (25) of the multiple tooth hay knife is equipped with the back of a bow stretched with steel plate punched, bow The steel plate of the two sides of back has certain angle, and the bottom of the back of a bow is polished to be formed and grinds cutting edge (20), the side of the tooth is Arc containing equiangular spiral, equiangular spiral be logatithmic spiral its with pressure angle equal characteristic everywhere;Steel plate punched used is drawn The upper die forming block (25a) and lower die forming blocks (25b) for stretching mould are multiple equidistant or isogonism briquettings, and steel plate used is first annealed again Quenching;It is polygonal pyramid shape that the mower blade, which sets wind wing honeycomb (29), and it is oval that middle part, which is equipped with through-hole (30),;It is described The blade of mower blade sets graphene plating indium;The blade of the mower blade is handled with laser quenching.Tool protection circuit Grass trimmer, which is characterized in that there is this circuit over-voltage protecting function main purpose to be to protect circuit power when overtension Circuit power cutting is carried out, is protected using the reverse breakdown principle of voltage-stabiliser tube;ZM4743A, ZM4735A, ZM4732A points It is not 13V/1W, the forward characteristic of the voltage-stabiliser tube of 6.2V/1W, 4.7V/1W, voltage-stabiliser tube is identical as general-purpose diode, and reversed special Property is more special:When backward voltage is added to a certain degree, although breakdown conditions are presented in pipe, by larger current, not Damage, and repeatability is good for this phenomenon;In turn, as long as pipe is in breakdown conditions, although flowing through the electricity of pipe It is very big changing, and the voltage at pipe both ends changes very little and plays pressure stabilization function;When voltage is more than the steady of ZM4743A voltage-stabiliser tube When pressure value, then D37, D40, generation circuit in the circuit R235 and Q34, triode ON, High_V_Fault is low level, this Electric potential signal is then fed back into MCU, is given MCU and is handled, and certain measure is carried out, and others are also such;It is additionally provided with under-voltage Circuit is protected, is protected when circuit voltage is less than setting value, the principle of comparator is utilized;LM224 is that four road transports are put Amplifier is inputted one end and is set as a reference value by big device, another input terminal is set as fiducial value, and output end is without feedback, then wirelessly Amplification and output are supply voltage value (VCC), are worth on the basis of holding in the same direction in this circuit, backward end is fiducial value, when backward end When voltage is greater than end in the same direction, exporting is 0, anyway signal one high and one low in this way forms logic circuit for supply voltage, passes through three poles The signal of LOW_V_Fault is transmitted to MCU by the switch of pipe, and MCU is handled according to signal.
Detailed description of the invention
Fig. 1 is the schematic diagram of the inside of the brushless motor multirow star rear axle driving retarder of hay mower.
Fig. 2 is that the motor of retarder is equipped with the schematic diagram of motor driving gear (88).
Fig. 3 is the schematic diagram of the O-ring seal (89) of the motor assembly of retarder.
Fig. 4 is the schematic diagram of safety clutch cone (90).
Fig. 5 is the schematic diagram of the behind of safety clutch cone (90).
Fig. 6 is that the schematic diagram for hanging link stopper (91a) rear axle driving gear (91) is closed containing peace.
Fig. 7 is the schematic diagram that peace closes elastic clip (92).
Fig. 8 is the schematic diagram of the upper cover (93) of the rear axle driving retarder of hay mower.
Fig. 9 is the schematic diagram of the baffle (94) of the motor driving gear of retarder.
Figure 10 is the schematic diagram of the motor shrouding disc (95) of the motor of retarder.
Figure 11 is the schematic diagram with the planet carrier output gear (96) of motor coaxle.
Figure 12 is the schematic diagram with the planet carrier of motor coaxle (97).
Figure 13 is the schematic diagram of planetary gear (98).
Figure 14 is the schematic diagram of the internal gear (99) of planetary system.
Figure 15 is the schematic diagram from the end face of tooth sleeve (100).
Figure 16 is the schematic diagram for hanging shelves disk (101).
Figure 17 is the schematic diagram from tooth sleeve (100).
Figure 18 is the schematic diagram of female connector gear (102).
Figure 19 is the schematic diagram from the another angle of tooth sleeve (100).
Figure 20 is the schematic diagram from the section of the major part of tooth sleeve (100).
Figure 21 is the schematic diagram from the section of the major part of tooth sleeve (100).
Figure 22 is the schematic diagram of small bearing (103).
Figure 23 is the diagrammatic cross-section of Double-gear (104).
Figure 24 is the schematic diagram of big bearing (105).
Figure 25 is the schematic diagram of the end face of Double-gear (104).
Figure 26 is the schematic diagram of the side of Double-gear (104).
Figure 27 is the schematic diagram of the inside of no planet rear axle driving retarder.
Figure 28 is schematic diagram of the motor from gear (106).
Figure 29 is schematic diagram of the motor from the end face of gear (106).
Figure 30 is a kind of schematic diagram of tool function curve clutch cone (1a).
Figure 31 is a kind of schematic diagram of noise elimination inner shaft (100a).
Figure 32 is a kind of schematic diagram for having tooth engagement of interlocking.
Figure 33 is a kind of schematic diagram of staggered gear (71).
Figure 34 is the schematic diagram of bevel gear (82).
Figure 35 is the schematic cross-sectional view of bevel gear (82).
Figure 36 is the schematic diagram with Ao Likang cycloid tooth hypoid gear.
Figure 37 is the schematic diagram for having staggered tooth meshed gears reduction gearbox.
Figure 38 is the stereoscopic schematic diagram of the front of the clutch slider of lawn machine gear-box.
Figure 39 is the stereoscopic schematic diagram at the rear portion of the clutch slider of lawn machine gear-box.
Figure 40 is the diagrammatic cross-section of the gear wheel of lawn machine gear-box.
Figure 41 is the diagrammatic cross-section of the gear wheel with bearing of lawn machine gear-box.
Figure 42 is the side schematic view of clutch slider.
Figure 43 is the schematic rear view of clutch slider.
Figure 44 is the schematic diagram of the assembly of clutch slider.
Figure 45 is the schematic diagram for having bevel gear meshed gears reduction gearbox.
Figure 46 is the schematic diagram for having the inside of bevel gear meshed gears reduction gearbox.
Figure 47 is the schematic diagram for having the inside of four planetary gear meshed gears reduction gearbox of three-level.
Figure 48 is the schematic diagram of the gear ring of the rear-wheel of hay mower.
Figure 49 is the another schematic diagram of the gear ring of the rear-wheel of hay mower.
Figure 50 is the circuit for controlling motor schematic diagram of hay mower.
Figure 51 is the motor overcurrent protection circuit and left and right movable motor braking circuit schematic diagram of hay mower.
Figure 52 is the circuit diagram of the speed of travel of the control motor of hay mower.
Figure 53 is the schematic diagram using four planetary gear meshed gears reduction gearbox of three-level of hay mower.
Figure 54 is the schematic diagram of four planetary gear meshing gear reduction gearbox of hay mower three-level.
Figure 55 is the schematic diagram of lawn mower blade.
Figure 56 is the schematic diagram of the equidistant punching press of module above and below lawn mower blade.
Figure 57 is the schematic diagram of the blade of the camber line of hay mower tool logatithmic spiral.
Figure 58 is the schematic diagram of the wind wing of the blade of the camber line of hay mower tool logatithmic spiral.
Figure 59 is the cross-sectional view of the polygonal pyramid of the wind wing of the blade of the camber line of hay mower tool logatithmic spiral.
Figure 60 is the schematic diagram of the polygonal pyramid of the wind wing of the blade of the camber line of hay mower tool logatithmic spiral.
Figure 61 is the schematic diagram of the back of a bow of the blade of hay mower tool logatithmic spiral camber line (19a).
Figure 62 is the schematic diagram that the back of a bow of the blade of hay mower tool logatithmic spiral camber line (19a) polishes.
Figure 63 is the blade of riding mower tool logatithmic spiral camber line and the schematic diagram of security protection piece (109).
Figure 64 is the schematic diagram of the rear axle of the reduction gearbox (108) of hay mower.
Figure 65 is the schematic diagram of the hay mower of no front-wheel.
Figure 66 is the schematic diagram of the bottom of the hay mower of no front-wheel.
Figure 67 is the schematic diagram of the high tension protection circuit of the grass trimmer with protective device.
Figure 68 is the schematic diagram of the low-voltage protection circuit of the grass trimmer with protective device.
Figure 69 is the schematic diagram of the voltage conversion circuit of the grass trimmer with protective device.
As shown, in figure:
1a1. is upward slope arc wave;1a2. is that top arc is convex;1a3. is the straight ripple of descending;
76. thick straight pin;77. spring;78. thin straight pin;41d. sliding sleeve;
The mono- group of side 42d.;43d. inner cone flange;
88. motor driving gear;
89. electricity secret seal;Half rear axle of 94a. long;Short half rear axle of 94b.;95. motor cover;95a. motor cover is biased from axis Hole;
98. planetary gear;106a. sipes hole;100. from tooth sleeve;106c. narrow slot hole;100a. noise elimination inner shaft;
97. planet carrier;
99. the internal gear of centre wheel;
96. planet carrier output gear;100a. noise elimination inner shaft;
105. big bearing;
104.2812 Double-gear;
93. upper cover;111. hilted broadsword;112. hilted broadsword seat;
104a.28 gear;104c.12 gear;
103. small bearing;92. peace closes elastic clip;
90. safety clutch is bored;Block is bored in 90c. clutch;90a. clutch taper pin slot;
101. hanging shelves disk;
91a. peace, which is closed, hangs link stopper;
Gear is driven 91. closing containing peace and hanging link stopper (91a) rear axle;
107. rear-wheel gear ring;107a. gear ring slot;107c. gear ring sinks recessed;The floating support of 107d. gear ring;
108. gear reduction box;19a. logatithmic spiral camber line;
109. security protection piece;
1a4. is bottom ripple (1a4);1a5. is flange (1a5);
1a6. is porous (1a6);1a7. is rear driver plate (1a7);
1a8. is multiple screw rods (1a8)
1a. is clutch slider, is sine wave type clutch block herein.
1c. is upper shift fork head;2c. is to set aside plug;
3c. is arched arm;4c. is sliding pulling sleeve;
5c. is thrust bearing shim;6c. is crossed helical gears;
8c. is lower case;9c. is short axle;
1d. is upper shift fork head;2d. is to set aside plug;
3d. is arched arm;4d. is sliding pulling sleeve;
5d. is thrust bearing shim;6d. is crossed helical gears;
2e. is threaded hydraulic fluid port;3e. is lower notch;
4e. is side platform;3b. is helical gear;
81. being cone pinion (81);
82. being the bevel gear (82) with clutch cone;
83. being the gear case lid (83) of powder metallurgy bevel gear gearbox;
84. being bracing wire torque arm (84);
85. being small Ao Likang bevel gear (85);
86. being the gear case lid (86) with the Ao Likang cycloid tooth hypoid gear reduction gearbox of inner conical drogue clutch;
87. being the big Ao Likang bevel gear (87) with inner conical drogue clutch;109. bumper.
Specific implementation method
Blade or point of a knife position dress knife blade and first be put into nanoscale print carbon dust, urea, borax mixing bury soil Middle progress carbon, nitrogen and boron is simultaneously heat-treated with frequency-conversion electromagnetic field permeation.Gear and axis important parts will be handled.
The hay mower of the tool brushless motor multirow star rear axle driving retarder further developed is that the pressure pair such as having Gradual perfection under the pioneer of the straight ripple powder metallurgy lawn machine gear-box of number curve arc wave.
The straight ripple powder metallurgy lawn machine gear-box of pressure logarithmic curve arc wave such as have, the gear-box is that lawn machine is used Gear-box, the gear-box its export main shaft be exactly from walking the main rear axle of lawn machine, the shaft end of the pinion gear of the gear-box with Big belt pulley is connected, and the small belt pulley of the big belt pulley and power machine output shaft is connected, referred to as primary transmission;The pinion gear It is engaged with gear wheel, referred to as secondary transmission;In the walking gear and rear-wheel with mono-directional overrun clutch at the main rear axle both ends The transmission of gear, referred to as three-level transmission;The gear wheel is coaxial with the main rear axle and is sleeved on the main rear axle with being able to rotate On, it is equipped with clutch block in the gear wheel, clutch slider is further sleeved on the main rear axle, the clutch slider is equipped with clutch Structure, containing the sliding slot that can be slided with pin along the main rear axle, the pin is placed in described for the inside of the clutch structure Vertical with the axis of the main rear axle in radial hole on main rear axle, one end of the clutch structure is equipped with clutch motion block, with Just operator pull and unclamp lawn machine from handle is walked when driving bracing wire, drawn in bracing wire and the bracing wire of the gear-box Arm, shift fork, tension spring, pressure spring, thrust bearing, gasket, rolling bearing, oiliness bearing, the combination of gear case lid and the canine tooth Under the collective effect for the clutch slider being set on the clutch block and the main rear axle being equipped in wheel by the gear wheel with it is described Driving and idle running between main rear axle and implement from walking the walking certainly and from not walking of lawn machine;The axis of the pinion gear is pacified by bearing On the gear case lid (83);The bearing installation position of the gear case lid (83) is in lawn machine gear-box Bearing installation position side;Movable bracing wire torque arm (84), the bracing wire are housed in the outside of the gear case lid The plate end of torque arm (84) is equipped with bracing wire side plate, and is equipped at another plate end of the bracing wire torque arm (84) and hangs small returning pull-spring Aperture;The bracing wire side plate that the plate end of the bracing wire torque arm (84) is equipped with is equipped with open slot, rolls over, in favor of bracing wire more Wirerope side hanging enters and is not easy to break off relations, and convenient for making bracing wire torque arm (84) rotation drive arrangement of clutch clutch by bracing wire;Institute Slotted hole is equipped in the plate for the bracing wire torque arm (84) stated, to match with shift fork;The upper end short axle of the shift fork is also equipped with double flute And screw thread manipulates to place torque arm and by bracing wire;The upper shift fork head of the shift fork and set aside plug be it is symmetrical and protrusion , which includes two groups of balanced points;The inside of the large bevel gear of the clutch containing inner conical drogue is equipped with mesoporous and hollows out Taper, so that mesoporous penetrates the rear main shaft of hay mower, the taper convenient for cutting out is adapted to clutch block or waveform block, simultaneously Also the inner wall of dress clutch block is equipped with convenient for its taper hollowed out;Its taper hollowed out is perhaps equipped with taper or is equipped with dress clutch The inner wall of block and multiple kicks;It is equipped with mutually vertical hole on rear main shaft, therefore thick straight pin (76), thin straight pin can be placed (78) and the pressure spring is exactly spring (77);The pinion gear of the gear-box is to increase gear ratio, suitably reduces small bevel gear The number of teeth of wheel;For the number of teeth of the cone pinion within 11 teeth, large bevel gear is 28 teeth;It is first produced with CNC or mold work interior Swaging die, then powder is put into pressing formation on press, it re-sinters, i.e., the method for powder metallurgy is to manufacture cone pinion and containing inner cone Cover the large bevel gear of clutch, it is therefore prevented that root is cut;The retarder upper casing (86) of the gear case lid can directly fill;The small bevel gear Wheel Ao Likang pinion gear, large bevel gear Ao Likang gear wheel optimize the engagement of secondary gear spiral bevel gear Parameter and geometrical factor, to constitute cycloid tooth hypoid gear;By wirerope and pull rod, make the lawn machine gear-box Also known as the short axle (9c) of the upper and lower side of the lower case (8c) of the The gear deceleration clutch housing containing multiple parts rotates certain angle Degree, and upper shift fork head (1c) is interlocked by arched arm (3c) and is set aside plug (2c), sliding pulling sleeve (4c) is pushed and pushes clutch Bearing shim (5c) and clutch block are axially moveable, thus engage in the rear wheel drive The gear deceleration clutch of traverse gear from The clutch gear set is attached together to walk to carry out oneself;The arrangement of clutch clutch speed reducer single side pushing of gear containing hay mower is sliding Set, by sliding sleeve (41d), single group of side (42d), inner cone flange (43d) is formed;On the sliding sleeve (41d) of the single side pushing sliding sleeve Equipped with single group of side (42d);Inner cone flange (43d) is equipped on single group of side (42d) of the single side pushing sliding sleeve;And the list When being equipped with discoid single group on the sliding sleeve (41d) for dialling sliding sleeve (4d) (42d);The medial surface of inner cone flange (43d) is circular cone Face is not more than 30 degree with axial angle;Since the single side pushing sliding sleeve (4d) is to be set with and slide on main shaft, institute The axis (7d) for the single side pushing sliding sleeve (4d) stated coincides with the main shaft of the arrangement of clutch in hay mower gear clutch speed reducer Line (7d), i.e. self-moving lawn mower rear wheel drive main shaft;Outside the sliding sleeve (41d) of the single side pushing sliding sleeve (4d) Face is movably installed with shift fork;Shift fork can be in contact with single group of side (42d) of the single side pushing sliding sleeve (4d) and stir it, i.e., by The inner cone flange (43d) of the single group of side (42d) contacts thrust bearing shim, so that arrangement of clutch be made to work;The list When dialling single group of sliding sleeve (4d), (42d) is in the form of annular discs;The back side of the disk of the single group of side (42d) and the inner cone are convex The accessible thrust bearing shim of edge (43d);The upper end short axle of shift fork is additionally provided with double flute and screw thread to place pull rod and to pass through Bracing wire manipulates, so that shift fork existing desired group of power be made to rotate freely in certain angle again;Hay mower gear case oil The hydraulic fluid port that mouth, the i.e. side of gear reduction unit are placed, the side of the lower casing body side surface by being located at rear wheel drive The gear deceleration clutch Platform (4e), the threaded hole (2e) for being located at retarder side and the lower section for being located at threaded hole and lacking in the intracorporal bottom surface of shell Mouth (3e) is formed, and the axis of the threaded hole (2e) is not orthogonal to bottom surface;Do not have to side core-pulling in order to facilitate demoulding, The side platform (4e) for putting spiral shell mosquito hole be connected directly with the big arc component in top rather than intermediate have indentation;The screw thread Hole is therefore to make the outer diameter of threaded line close to bottom inner face as far as possible to be screwed into hydraulic fluid port screw, so as to retained oil few when draining;It refuels Very thick li of rouge is dragged number very big, though it can use effect should lubricating oil;It the lower section for being located at threaded hole and goes to the bottom in shell The lower notch (3e) in face is rectangle, prevents screw from not touching and being arranged;Lawn machine gear-box (76) containing thick straight pin, carefully Straight pin (78), spring (77) are also known as pressure spring, and both ends are and tight and polish;It is described the pressure logarithmic curve arc wave such as to have straight The small staggered gear of pinion gear Worm type of the gear-box of ripple remodeling injection molding lawn machine gear-box, the small friendship of Worm type The shaft end of side set wheel is connected with big belt pulley, and the small belt pulley of the big belt pulley and power machine output shaft is connected, and is level-one Transmission, no-load voltage ratio is in 2.1-4;The pinion gear is engaged with gear wheel, referred to as secondary transmission;The gear wheel of the gear-box is handed over big Side set wheel is warm extrusion powder metallurgy;The small staggered gear is engaged with the big staggered gear of warm extrusion powder metallurgy, is two Grade transmission, no-load voltage ratio is in 5.1-8;Warm extrusion powder metallurgy walking gear of the main rear axle both ends with mono-directional overrun clutch is with after Plastic annular wheel transmission is taken turns, is driven for three-level, no-load voltage ratio is in 2.1-4:The big staggered gear is coaxial with the main rear axle and living Dynamic to be sleeved on the main rear axle, the gear of the gear wheel is big staggered gear, is the processing and manufacturing of warm extrusion powder metallurgy 's;Clutch block is equipped in the gear wheel, be also cooperation containing etc. in the straight ripple of pressure logarithmic curve arc wave clutch it is big Staggered gear, the gear wheel is coaxial with the main rear axle and is sleeved on being able to rotate on the main rear axle;On the main rear axle It is further sleeved with clutch slider, the pressure logarithmic curve such as the clutch slider is equipped with, that is the clutch slider is that have equipressure The clutch slider of the straight ripple of power logarithmic curve arc wave, the inside of the clutch structure contains can be as pin be sliding along the main rear axle Dynamic sliding slot, the pin be placed in it is vertical with the axis of the main rear axle in the radial hole on the main rear axle, it is described from The one end for closing structure is equipped with clutch motion block, so as to pull and unclamp in operator lawn machine from walk handle and when driving bracing wire, Bracing wire and the bracing wire torque arm of the gear-box, shift fork, tension spring, pressure spring, thrust bearing, gasket, rolling bearing, oiliness bearing, The clutch slider being set on the clutch block and the main rear axle being equipped in the combination of gear case lid and the gear wheel it is common Under effect, carries out secondary transmission and implemented by driving between the gear wheel and the main rear axle and idle running from walking lawn Machine being walked certainly and not walking certainly;The feature for the straight ripple remodeling injection molding lawn machine gear-box of pressure logarithmic curve arc wave such as having is also Be, the gear-box is remodeling injection molding cabinet, operator do not grab lawn machine from walk handle and when without straining at line, because of pressure Spring is mounted in the outside of clutch slider, and far from gear wheel, rather than between the gear wheel and clutch slider, normality is drawn when hand pine Line pine, and bracing wire torque arm makes shift fork outward under tension spring effect and pushes down pressure spring and separates clutch slider with gear wheel, clutch Sliding block and main rear axle are detached from active force, this is not walk state certainly;When operator finger-tight lawn machine from walk handle and with tight When bracing wire because pressure spring is mounted in the outside of clutch slider, far from gear wheel, rather than the gear wheel and clutch slider it Between, it is tight that state bracing wire is closed when hand-tight, and bracing wire torque arm keeps shift fork inside under tension spring effect, does not push down pressure spring, pressure spring effectively pushes Clutch slider and engage the clutch block being equipped in clutch slider and gear wheel, clutch slider and main rear axle relate to active force, To realize primary transmission, secondary transmission and three-level transmission, this is to walk state certainly;It is described the pressure logarithmic curve arc wave such as to have straight The clutch block being equipped in the clutch slider and gear wheel of ripple remodeling injection molding lawn machine gear-box, which engages, to be further characterized in that, described The end of clutch slider and clutch block is equipped with the clutch cone of the cone of multiple smooth curves connection along end circumference, is slightly in round Taper, the bus of the curved surface of the circular conical surface of cone are that there is the equiangular spiral of pressure angle properties equivalent everywhere to be also referred to as logarithm Helical;So the clutch block in the clutch slider and gear wheel is convenient for smooth co-operation by equiangular spiral face;Above-mentioned technology In scheme, one section of the main body of the clutch slider is taken,
Establish differential equation d ρ/d θ=k ρ:
It is equal everywhere because wanting pressure angle λ if polar equation ρ=ρ (θ), therefore tg λ=constant, tg λ=k is enabled,
By pressure angle formula tg λ=ρ '/ρ,
Just there is ρ '/ρ=k,
Differential it, just have differential equation d ρ/d θ=k ρ
D ρ/d θ=k ρ is solved, both sides integrate after variables separation:
∫ d ρ/ρ=∫ kd θ is easy to get because of ρ > 0:
Ln ρ=k θ+C,
It is i.e. exponential:
Using PRO/ENGINEER WILDFIRE mapping software, working directory is newly set, creates part,
Establish parameter (PARAMETER) 1:C real number (real number), default assignment.
Establish parameter (PARAMETER) 2:N integer (integer), default assignment.
Opening relationships (RELATION), i.e., equation of the invention are:
Logarithmic curve:
Z=0
X=10*t
Y=log (10*t+0.0001)
Produce logarithmic curve;
Followed by using rotation, merging, hypostazation etc. is instructed, and is assembled and merged with workpiece, can be modeled;
It is modeled again with the equation and PRO/ENGINEER WILDFIRE, inputs CNC machining center, used CIMATRO or MASTCAM, the punching block of warm extrusion powder die-casting processed, or assisted with milling machine, planer and electrical spark working work;Use electrical fire When flower processing, CNC machining center is inputted with the equation, processes, first to produce tungsten copper electrode, then produce and first quench Very hard punching block clutch mold core;Big staggered gear is processed, then first to produce tungsten copper electrode with gear-hobbing machine, then the tungsten copper electricity rolled out The rotation gear parts of pole, immersing spirit of vinegar makes the small several silks of rotation gear so that precautions averts perils offset subsequent electric machining Cydariform discharge in the gap of tooth root, produce warm extrusion powder metallurgical gear punching block with the lathe for having three-dimensional rotation head;It machines again Workpiece is produced along multiple clutch cones for having logatithmic spiral that end circumference is equipped in the end of the clutch slider and clutch block Arc wave and straight ripple, each clutch cone successively press four kinds of morphologic arrangements, it is convex to be followed successively by upward slope arc wave (1a1), top arc (1a2), the straight ripple of descending (1a3), bottom ripple (1a4), that is to say, that in the clutch slider and clutch block along end circumference The contour curve of the dominant shape state for the multiple clutches cone being equipped with is one section that rough logatithmic spiral is also known as equiangular spiral, then is successively pressed It is carved each part of four kinds of morphologic arrangements;On the logatithmic spiral arc of the upgrade of the upward slope arc wave (1a1) Compactly radial is laterally to be carved with multiple fluctuating great waves lines, also known as arc wave;And it is not carved on the top arc convex (1a2) Line, but it is closer by the straight ripple of the descending so that it is pushed up the convex approximate center of circle of arc;Again in the gradient of the straight ripple of the descending (1a3) Compactly axial in more precipitous form is that the more straightforward multiple tendons for having fluctuating great waves and multiple grooves are carved in longitudinal direction, also Referred to as straight ripple;A little striped is radially laterally carved on the bottom ripple (1a4);The pressure logarithm such as have bent so as to described The mechanism of the clutch of the clutch slider and clutch block of the straight ripple powder metallurgy lawn machine gear-box of bank wave more connects at work The pressure angle of nearly higher mathematics everywhere equal scientific basis and it is more stable and more reliable;It is polished and is assembled, then pushed with band The warm extrusion powder metallurgy press batch production of the manipulator cooperation of powder;Gear housing remodeling injection-moulded plastic, with nylon double six Add 30% glass to carry out pre-treatment, first shine under fine day sunlight and handled as more praseodymium light, then preliminary drying is no less than in 81-119 degree 31 minutes;Gear housing after injection molding is post-processed, and is no less than 121 minutes in 100-121 degree boiling;Entire assembly is sealed Gear-box sampling be put into the water of upper layer icing no less than 24 hours strength checkings again;The gear wheel of the gear-box is handed over big Side set wheel and clutch slider are to be also known as warm extrusion powder metallurgy pressing with temperature and pressure, and powder used is temperature and pressure powder, the temperature and pressure Small white plate for taking accounts or notes temporary number 7.0g/ccmin-7.6g/ccmin, for temperature and pressure temperature at 99-129 degrees Celsius, the warm extrusion powder metallurgy workpieces pressed are first Immersion oil is pulled out and is drained;It is heat-treated, carbo-nitriding, with methane and ammonia, is being heat-treated 4 hours no more than 899 degree again;It is tempered again Processing 180 degree 90 minutes;Hardness should be spent in Rockwell HRC35-44, described the pressure logarithmic curve arc wave such as have straight to meet The small staggered gear of ripple powder metallurgy lawn machine gear-box engages and meets institute with the big staggered gear of warm extrusion powder metallurgy State the clutch of the gear wheel big staggered gear and clutch slider of gear-box;Bearing can be filled in the gear wheel of the gear-box, Pressure spring can be filled;The clutch slider is equipped with flange (1a5), and driver plate after multiple screw rods (1a8) connection can be used by being equipped with porous (1a6) (1a7), the flange (1a5) and it is described after driver plate (1a7) be it is parallel, in favor of insert between into shift fork upper group Plug (1c) and set aside the power that plug (2c) makes all capable i.e. clutch in left and right that can obtain shift fork;The clutch slider it is another Great undertaking is that entirety is equipped with flange (1a5) in the middle and end is equipped with rear driver plate (1a7) behind, is wanted if it is moulding Making Side core pulling could demould, but because being that the bad Side of warm extrusion powder metallurgy takes out, existing to be directly inserted through without Side core pulling but mold, Method it is skilful be the flange (1a5) being equipped in the middle part of it in the clutch slider and end is equipped with behind rear driver plate (1a7) It is both conveniently stripped in this way equipped with the staggered opening of multiple complementations, it cannot bilayer processed across the bad Side core pulling of warm extrusion powder metallurgy The difficulty of flange and driver plate, and conveniently insert the upper shift fork head (1c) into shift fork therebetween in the double-deck flange and driver plate and set aside Plug (2c) fundamentally solves clutch and does not make mistakes so that left and right is all capable i.e. from the power that can obtain shift fork with conjunction.
The entirety of the clutch slider is equipped with flange (1a5) in the middle and end is equipped with rear driver plate (1a7) behind, and The flange (1a5) that is equipped in the middle part of it in the clutch slider and the rear driver plate (1a7) that end is equipped with behind are equipped with 4 complementations Staggered opening, the flange (1a5) and the rear driver plate (1a7) have parallel surface, in favor of being inserted between into shift fork Upper shift fork head (1c) and set aside plug (2c).
The entirety of the clutch slider is equipped with flange (105) in the middle and end is equipped with rear driver plate (1a7) behind, and The flange (1a5) that is equipped in the middle part of it in the clutch slider and the rear driver plate (1a7) that end is equipped with behind are equipped with 2-3 mutually Mend staggered opening, there is a chamfering on mouth side, the flange (1a5) and it is described after driver plate (1a7) have parallel surface, in favor of the two it It interleaves the upper shift fork head (1c) for being packed into shift fork and sets aside plug (2c).
The entirety of the clutch slider is equipped with flange (1a5) in the middle and end is equipped with rear driver plate (1a7) behind, and The flange (1a5) that is equipped in the middle part of it in the clutch slider and the rear driver plate (1a7) that end is equipped with behind are equipped with 5-24 Complementary staggered opening, mouth Edge Blend angle, the flange (1a5) and the rear driver plate (1a7) have parallel surface, in favor of in the two Between insert the upper shift fork head (1c) into shift fork and set aside plug (2c).
The clutch slider is equipped with flange (1a5), is equipped with 2 holes (1a6), driver plate after capable of being connected with 2 screw rods (1a8) (1a7) make the flange (1a5) with it is described after driver plate (1a7) it is parallel, in favor of insert between into shift fork upper group It plug (1c) and sets aside plug (2c).
The clutch slider is equipped with flange (1a5), is equipped with the hole 3-18 (1a6), can be with after 3-18 screw rod (1a8) connection Driver plate (1a7) makes the flange (1a5) parallel with rear driver plate (1a7), in favor of being inserted between into shift fork It upper shift fork head (1c) and sets aside plug (2c).
The clutch slider is equipped with flange (1a5), and being equipped with the hole 3-18 (1a6), it is threaded hole, can use 3-18 screw rod Driver plate (1a7) makes the flange (1a5) parallel with rear driver plate (1a7) after (1a8) connection, in favor of between It inserts the upper shift fork head (1c) into shift fork and sets aside plug (2c).
The gear wheel of the gear-box big staggered gear and clutch slider are to be also known as warm extrusion powder metallurgy with temperature and pressure Compacting, powder used is temperature and pressure powder, the temperature and pressure small white plate for taking accounts or notes temporary number SMF5040, is 7.0g/ccmin, temperature and pressure temperature is in 101- 119 degrees Celsius, the warm extrusion powder metallurgy workpieces elder generation immersion oil pressed is pulled out and is drained;It is heat-treated again, methane is used in carbon nitrogen permeation And ammonia, it is being heat-treated 4 hours no more than 818 degree;170 degree of tempering 60-100 minutes again.
The gear wheel of the gear-box big staggered gear and clutch slider are to be also known as warm extrusion powder metallurgy with temperature and pressure Compacting, powder used is temperature and pressure powder, and the temperature and pressure small white plate for taking accounts or notes temporary number 7.0g/ccmin, temperature and pressure temperature has been pressed at 98 degrees Celsius Warm extrusion powder metallurgy workpieces are submerged initially in transgenic rape, pull out and drain, and place into and vacuumize tank;It is heat-treated again, carbon, nitrogen and boron permeation, 723 degree, 8 hours of iron-carbon alloy theory inflection point.
The clutch that there is logatithmic spiral in the end of the clutch slider and clutch block along the 3-18 that end circumference is equipped with is bored It is formed with arc wave and straight ripple, each clutch cone successively presses four kinds of morphologic arrangements, is followed successively by upward slope arc wave (1a1), top Arc convex (1a2), the straight ripple of descending (1a3), bottom ripple (1a4), that is to say, that in the clutch slider and clutch block along end The contour curve of the dominant shape state for multiple clutches cone that circumference is equipped with is one section that rough logatithmic spiral is also known as equiangular spiral, then according to It is carved secondary each part by four kinds of morphologic arrangements;In the logatithmic spiral of the upgrade of the upward slope arc wave (1a1) Compactly radial on arc is laterally to be carved at least two fluctuating great waves line, also known as arc wave;And it is convex (1a2) in the top arc On it is not embossed or have at least one;It is compactly axial i.e. vertical in the more precipitous form of the gradient of the straight ripple of the descending (1a3) again 2 tendons having fluctuating great waves and 2 grooves at least straightforward to engraving, also known as straight ripple;On the bottom ripple (1a4) Radial is laterally to be carved at least one striped;So as to it is described the straight ripple clutch of pressure logarithmic curve arc wave such as have when it is closer The pressure angle of higher mathematics everywhere equal scientific basis and it is more stable and more reliable.
The present invention relates to a kind of for the hay mower that places cut the grass on a lawn beside garden, park and road etc., especially It is the straight ripple powder metallurgy lawn machine gear-box of pressure logarithmic curve arc wave such as to have, great undertaking, which is that clutch slider is whole, to exist Its middle part is equipped with flange (105) and end is equipped with rear driver plate (1a7) behind, because being that the bad Side of warm extrusion powder metallurgy takes out, does Method it is skilful be the flange (105) being equipped in the middle part of it in the clutch slider and end is equipped with behind rear driver plate (1a7) is all provided with There is the staggered opening of multiple complementations, it is both conveniently stripped in this way, the double-deck flange and driver plate cannot be made across warm extrusion powder metallurgy Difficulty, and conveniently inserted into shift fork therebetween in the double-deck flange and driver plate, so that left and right is all capable can be obtained from conjunction The power of shift fork fundamentally solves clutch and does not make mistakes.The end of clutch slider and clutch block is equipped with multiple along end circumference There is the clutch of logatithmic spiral to bore and be formed with arc wave and straight ripple, it is convex that each clutch cone is followed successively by upward slope arc wave (1a1), top arc (1a2), the straight ripple of descending (1a3), bottom ripple (1a4), that is to say, that in the wheel of the dominant shape state of the clutch slider and clutch block Wide curve is one section of logatithmic spiral, closer to the pressure angle of higher mathematics when to there is the straight ripple clutch of logarithmic curve arc wave Everywhere equal scientific basis and it is more stable and more reliable.Exploring warm extrusion powder metallurgically manufacturing method, also there are many innovations.Lawn Grass trimmer gear-box either Plastic or metal class, limited by technology and cost etc., walk certainly clutch it is unstable and Insecure situation happens occasionally, and solves the problems, such as sporadic not clutch, is always the international hard nut to crack of industry.
Etc. pressure logarithmic curve sound profound, but in its tangible factory be it is common, it is this kind of the pressure logarithmic curve such as to have The punching block core for the pressure logarithmic curves such as many intermediate pincers worker of cam can all be done, and two, work has, the end of clutch slider and clutch block It is formed with arc wave and straight ripple on multiple clutch cones for having logatithmic spiral that circumference is equipped with along end, each clutch cone is followed successively by Slope arc wave (1a1), top arc convex (1a2), the straight ripple of descending (1a3), bottom ripple (1a4), that is to say, that in the clutch slider Contour curve with the dominant shape state of clutch block is one section of logatithmic spiral, then is produced in batches.It is existing can without Side core pulling but Mold is directly inserted through, method it is skilful be the flange (1a5) being equipped in the middle part of it in the clutch slider and end is equipped with behind Rear driver plate (1a7) be equipped with the staggered opening of multiple complementations, it is both conveniently stripped in this way, across the bad Side of warm extrusion powder metallurgy Core pulling cannot make the difficulty of the double-deck flange and driver plate, but conveniently the double-deck flange and driver plate insert therebetween into shift fork upper group Plug (1c) and set aside plug (2c) so that left and right all it is capable i.e. from close the power that can obtain shift fork, fundamentally solve Clutch is not made mistakes, because the power of people plus the shift fork of leverage are greater than the power of spring.
Various specific embodiment described in this specification is treasure and the crystallization of domestic and foreign experience, be also for The purpose, feature and effect of this creation is described in detail, for the people's bodyguard for being familiar with such skill, according to above-mentioned various explanations, The invention and specific embodiment may be made and some modifications and modification are made in certain parts, essence is without departing from the essence for going out this creation Refreshing scope person should all be included within the scope of patent protection of the invention, suitable elder generation Chen Ming.
Hay mower is widely used in being cut not in the way of walk sometimes from walking sometimes by the hobby of people is selected Grass.Operation pedestrian pulls from control crank is walked, and by wirerope and driving lever, clutch block is made to be axially displaced to clutch.It is existing The clutch block of arrangement of clutch in the rear wheel drive The gear deceleration clutch of the traverse gear of technology is only by clutch block side Circular cone carrys out clutch, needs biggish axially combined power, and the damage phenomenon for causing internal pressure ring washer to be broken occurs frequently;Between circular conical surface Frictional heat is generated in engaging process, needs to add lubricating oil in gear-box;And there is friction to have opposite sliding between circular conical surface, consume function Rate.It is hay mower gear-box either Plastic or metal class, it is limited by technology and cost etc., walks clutch certainly not Steady and insecure situation happens occasionally, and solves the problems, such as sporadic not clutch, is always the international long-standing of industry Problem.
Working condition caused by the clutch in rear wheel drive retarder in order to overcome the hay mower prior art Deficiency associate the present inventor and also to invent several different types of hay mower clutches and retarder Once it was related to certain devices of manufacture as senior engineer SENIOR ENGINEER such as Switzerland external, and was improved special kneading, then auxiliary Product can be made to attain a yet higher goal with invention, the present inventor has made a variety of designs and innovation with lifetime domestic and international working experience, just like The mankind pursue invention perfection be it is forever continuous, below just a variety of gradually improve and perfects practical plan combine a variety of diagrams And it is explained in detail.
The power of common hay mower is used from the vertical cutter shaft for the engine being located in the middle part of hay mower Belt and belt pulley carry out primary transmission, and revolving speed is changed into 1500 turns every point from every point 3000, then carries out secondary transmission and guide to position In the retarder containing clutch of the driving rear axle at hay mower rear portion, the gear ratio of two stage reducer is up to 5, and revolving speed is from every point 1500 are changed into 300 turns every point of driving rear axle, then carry out three-level transmission, by the coaxial driving gear and lawn of driving rear axle Internal gear gear ring in the rear-wheel of grass trimmer is meshed, and because rear-wheel will adjust different mowing heights, therefore the axis of rear-wheel is in adjusting height It is upper and with driving rear axle cannot coaxial but two axis it is parallel, make hay mower it is maximum from speed is walked substantially at one meter per second, To meet customer requirement.
For energy-saving and emission-reduction, nocuousness HC hydrocarbon emission is reduced, on the one hand hay mower is to improve engine On the other hand discharge is using electric energy, generally only several hectowatts low with lithium battery power must go to charge each hour;And lawn Grass trimmer makees a few hours with starting the thousands of bricklayers of function;Nevertheless, the hay mower or order of electricity consumption significantly increase, because People pursue environmental protection target be it is firm, pursue the automation of operation and intelligence be it is endless, as a result, Yi Zhongyou The gardens intelligent grass-removing that energy-saving circuit control is conducive to noise reduction is just come into being with four planetary gear rear-guard moving gear box of three-level.
The power of common hay mower is used from the vertical cutter shaft for the engine being located in the middle part of hay mower Belt and belt pulley carry out primary transmission, and revolving speed is changed into 1500 turns every point from every point 3000, then carries out secondary transmission and guide to position In the retarder containing clutch of the driving rear axle at hay mower rear portion, the gear ratio of two stage reducer is up to 5, and revolving speed is from every point 1500 are changed into 300 turns every point of driving rear axle, then carry out three-level transmission, by the coaxial driving gear and lawn of driving rear axle Internal gear gear ring in the rear-wheel of grass trimmer is meshed, and because rear-wheel will adjust different mowing heights, therefore the axis of rear-wheel is in adjusting height It is upper and with driving rear axle cannot coaxial but two axis it is parallel, make hay mower it is maximum from walk speed substantially at one meter per second completely Sufficient customer requirement;But technical problem is limitation of the electricity consumption by power supply on hay mower, motor is according to there is brush Series-wound motor then has brush big to radio interference.Lithium battery group charging source is used on hay mower, motor is then It is to have certain improvement using brushless motor;But to pursue the output of small size height, the revolving speed of brushless motor is up to every point More than 20000 turns, be greatly more than ten times, this allows for electronic subtract relative to 1500 turns of every point of initial speed of original retarder The difficulty of fast device greatly increases, and to cost is reduced, reduces noise, forces down temperature rise, increases no-load voltage ratio and is proposed very high requirement.
Cutter blade for mowing machine and reducer gear and the processing of the carbon, nitrogen and boron of air-cooled inner shaft, gear shaft are empty tubuloses, Inside is logical so that outer blowing air is cooling;The harmonic gear flexbile gear driven rear axle drives retarder, with turning for brushless motor 20000 turns every point of speed, 250 watts of power, 36 volts, 5 millimeters of shaft diameter of output;The number of teeth 18 of motor driving gear (88);The electricity The motor gear of the number of teeth 18 of owner's moving gear (88) and three each numbers of teeth 18, the not only rotation of modulus 0.6 but also around along horse Up to axis public axis revolve planetary gear (98) engagement, the planetary gear be attached separately to respectively and it is equidistant with public axis Planet carrier (97) three planet wheel spindles on;The motor gear of the number of teeth 18 is steel 40Cr;The planetary gear (98) Three planetary gears be polyformaldehyde;It is engaged with planetary gear and the internal gear of the centre wheel of planetary system that geometrical axis is fixed It (99) is steel 40Cr, modulus is 0.6, and the number of teeth is 60, and the classification of the Planetary Gear Transmission is NGW type, and N is internal messing tooth Wheel, G is the composite gear among two gear Meshing Pairs, and W is external gear pump;The transmission ratio of the Planetary Gear Transmission is 1+ 60/18 is 4.3, meets transmission ratio recommendation 2.7 to 9, and transmission efficiency is percent 97-99;The public axis of the planet carrier (97) Line center projecting shaft be equipped with symmetrical two sectors be formed by fan groove, so as to the planet carrier with motor coaxle Symmetrical two sectors that the public axis centre projecting shaft of output gear (96) is equipped be formed by it is fan-shaped it is convex come interworking insert Merge and be inserted into the inner ring of big bearing (105), the number of teeth of the planet carrier output gear (96) is that 26, modulus is 1.5, reference circle is 26x01.5=39;2812 Double-gears on the planet carrier output gear (96) and the first jackshaft (104) it be 1.5, reference circle is that 28 gears of 28x01.5=42 are meshed that the number of teeth, which is 28, modulus, on first jackshaft 28 gears (104a) and the planet carrier output gear (96) the number of teeth be 26 the planet carrier output gear (96) between The first jackshaft transmission ratio be 28/26 for 1.077;28 gears of 2812 Double-gear (104) containing the 28 coaxial numbers of teeth The both ends of 12 gears (104c) of (104a) and 12 numbers of teeth, 2812 Double-gear (104) are respectively provided with small bearing (103), described The outer diameter of small bearing (103) is 14mm, so as to the inner hole at the both ends with 2812 Double-gear (104), the small bearing (103) internal diameter be 5 so as to the first jackshaft activity assemble;Identical 2812 Double-gear of another structure (104) also 12 gears (104c) of 28 gears (104a) containing the 28 coaxial numbers of teeth and 12 numbers of teeth, on the second jackshaft, institute The both ends for stating 2812 Double-gears (104) are respectively provided with small bearing (103), and the outer diameter of the small bearing (103) is 14mm., so as to The inner hole at the both ends of 2812 Double-gear (104), the internal diameter of the small bearing (103) be 5 so as to described second in Between axis activity assemble;Coaxial 28 gears (104a) in 28 numbers of teeth of 2812 Double-gears (104) on first jackshaft 12 gears (104c) of 12 numbers of teeth, 2812 Double-gear identical with another structure on second jackshaft (104) also 28 gears (104a) containing the 28 coaxial numbers of teeth are meshed, 28 gears (104a) and institute on second jackshaft The the second axis transmission ratio stated between 12 gears (104c) of 12 numbers of teeth of 2812 Double-gears (104) on the first jackshaft is 28/ 12 be 2.33;2812 Double-gear (104) is containing 28 gears (104a) of the 28 coaxial numbers of teeth and 12 gears of 12 numbers of teeth (104c) is with polyformaldehyde machine-shaping in injection mold;The rear axle output par, c of the retarder is containing coaxial length half Rear axle and short half rear axle are sequentially arranged with rear axle driving reducing gearbox oil sealing on half rear axle of length, peace closes elastic clip (92), iron pad Circle, safety clutch bore (90), hang shelves disk (101), extension link stopper (91a) rear axle driving gear (91) is closed containing peace, pressing from both sides axis in long axis, institute It states long half rear axle and is equipped with radial cross-drilled hole will pass through lateral pin nail with safety clutch cone (90) and be connected, the peace closes elastic clip (92) the safety clutch cone (90) and the extension shelves disk (101), the safety clutch cone (90) and the extension shelves disk are sandwiched (101) it hangs link stopper (91a) rear axle driving gear (91) with described close containing peace and is connected, one end of half rear axle of length is equipped with axial deep Hole presss from both sides axis to be inserted into the long axis, is inserted into the axial deep hole that one end of short half rear axle is equipped with and makes the length half Rear axle and the short half rear axle activity are connected;Be sequentially arranged on short half rear axle rear axle driving retarder upper cover and oil sealing, It is successively filled with another set of peace to close elastic clip (92), iron washer, safety clutch cone (90), hang shelves disk (101), after described short half Radial cross-drilled hole also is provided on axis will pass through lateral pin nail with another set of safety clutch cone (90) and be connected, another set of is described Peace closes elastic clip (92) and sandwiches the safety clutch cone (90) and the extension shelves disk (101), described on short half rear axle Safety clutch bores (90) and the extension shelves disk (101) and also hangs the driving of link stopper (91a) rear axle with unique described close containing peace above-mentioned Gear (91) is connected;The number of teeth that extension link stopper (91a) rear axle driving gear (91) is closed containing peace is 33 teeth and modulus is 2.5;Institute It states 12 gears (104c) of 12 numbers of teeth of 28 gears (104a) on the second jackshaft and described on the rear axle closes containing peace and hang It is 2.75 that transfer rear axle transmission ratio between link stopper (91a) rear axle driving gear (91), which is 33/12,;Retarder resultant gear ratio is 4.3x33/12x28/12x28/26=4.3x6.9=30 again, sharing;It is characterized in that, the other end and the institute of half rear axle of length The other end for stating short half rear axle is respectively provided with laterally double groovings and laterally double groovings are driven with civilian dress rear wheel drive gear, the rear-wheel Moving gear is 14 tooth modules 2.5, and the rear-wheel gear ring with the rear wheel drive cartridge driving gear in hay mower rear-wheel (107), the number of teeth of the rear-wheel gear ring (107) is that 52 tooth modules 2.5 match small grass trimmer rear-wheel.
It is not at all easy to have innovated a kind of use for not only having reached no-load voltage ratio but also meet heat dissipation in order to save planet carrier and planet internal-gear The gardens machine of the air-cooled no planet rear axle driving retarder of electric gear inner shaft, drives retarder containing no planet rear axle, from gear Axis is empty tubulose, and inside is logical so that outer blowing air cools down, and gear is herringbone bear, usefulness do not say and Analogy.
The gardens machine of the air-cooled no planet rear axle driving retarder of electric gear inner shaft, is empty tubulose from gear shaft;Nothing 250 watts of 20000 turns of every point of revolving speed, the power of brush motor, 36 volts, 5 millimeters of shaft diameter of output;The number of teeth of motor driving gear (88) 18, modulus 0.6, reference circle are 18x0.6=10.8;Remove planetary gear train, horse motor driving gear (88) and newly set It is engaged up to the motor on driven shaft from gear (106), the motor from gear (106) is the number of teeth 38, modulus 0.6, reference circle are 38x0.6=22.8, motor driven ratio is 38/18;The motor matches out of gear with 14x5 bearing;The motor newly set Equipped with from tooth sleeve (100) and female connector gear (102) on driven shaft, the number of teeth of the female connector gear (102) be 12 and modulus be 1.5, the female connector gear is 28, modulus with the number of teeth as 2812 Double-gears (104) on output gear and the first jackshaft It is 1.5, reference circle is that 28 gears of 28x01.5=42 are meshed, the output gear and first of the motor driven axis newly set Jackshaft transmission ratio is 28/12;The above transmission ratio is 38/18x28/12=4.9, is more than planet no-load voltage ratio 4.33, actually shares;Its Remaining no-load voltage ratio is roughly the same;2812 Double-gear (104) is containing 28 gears (104a) of the 28 coaxial numbers of teeth and 12 teeth of 12 numbers of teeth It takes turns (104c), the both ends of 2812 Double-gear (104) are respectively provided with small bearing (103), and the outer diameter of the small bearing (103) is 14mm, so as to the inner hole at the both ends with 2812 Double-gear (104), the internal diameter of the small bearing (103) be 5 so as to The first jackshaft activity assembly;Identical 2812 Double-gear (104) of another structure is also containing the 28 coaxial numbers of teeth 12 gears (104c) of 28 gears (104a) and 12 numbers of teeth, on the second jackshaft, the both ends of 2812 Double-gear (104) It is respectively provided with small bearing (103), the outer diameter of the small bearing (103) is 14mm, so as to two with 2812 Double-gear (104) The inner hole at end, the internal diameter of the small bearing (103) be 5 so as to the second jackshaft activity assemble;In described first Between 2812 Double-gears (104) on axis coaxial 28 gears (104a) in 28 numbers of teeth 12 numbers of teeth 12 gears (104c) with Identical 2812 Double-gear (104) of another structure on second jackshaft also containing the 28 coaxial numbers of teeth 28 Gear (104a) is meshed, 28 gears (104a) on second jackshaft and 2812 Double-gears on first jackshaft (104) it is 2.33 that the second axis transmission ratio between 12 gears (104c) of 12 numbers of teeth, which is 28/12,;2812 Double-gear (104) 28 gears (104a) containing the 28 coaxial numbers of teeth and 12 gears (104c) of 12 numbers of teeth are with polyformaldehyde in injection mold In machine-shaping;The rear axle output par, c of the retarder is containing coaxial half rear axle of length and short half rear axle, after the length half Rear axle driving reducing gearbox oil sealing is sequentially arranged on axis, peace closes elastic clip (92), iron washer, safety clutch cone (90), hangs shelves disk (101), it closed containing peace and hangs link stopper (91a) rear axle driving gear (91), press from both sides axis in long axis, half rear axle of length is equipped with radial cross-drilled hole It is connected with will pass through lateral pin nail with safety clutch cone (90), the peace closes elastic clip (92) and sandwiches the safety clutch cone (90) and the extension shelves disk (101), the safety clutch bore (90) and the extension shelves disk (101) and the conjunction containing peace extension link stopper (91a) rear axle driving gear (91) is connected, and one end of half rear axle of length is equipped with axial deep hole, presss from both sides to be inserted into the long axis Axis is inserted into the axial deep hole that one end of short half rear axle is equipped with and makes half rear axle of length and the short half rear axle activity phase Connection;It is sequentially arranged with rear axle driving retarder upper cover and oil sealing on short half rear axle, is also successively filled with another set of peace conjunction elasticity It presss from both sides (92), iron washer, safety clutch cone (90), hang shelves disk (101), also be provided with radial cross-drilled hole on short half rear axle to lead to It crosses lateral pin nail to be connected with another set of safety clutch cone (90), another set of peace conjunction elastic clip (92) sandwiches described Safety clutch bores (90) and the extension shelves disk (101), safety clutch cone (90) and the extension shelves on short half rear axle Disk (101) also hangs link stopper (91a) rear axle driving gear (91) with unique conjunction containing peace above-mentioned and is connected;It is described to be closed containing peace The number of teeth for hanging link stopper (91a) rear axle driving gear (91) is 33 teeth and modulus is 2.5;28 gears on second jackshaft 12 gears (104c) of 12 numbers of teeth of (104a) and the conjunction containing peace on the rear axle hang link stopper (91a) rear axle and drive gear (91) it is 2.75 that the transfer rear axle transmission ratio between, which is 33/12,;Retarder resultant gear ratio is 4.3x33/12x28/12x28/26 =4.3x6.9=30 times, it shares;It is characterized in that, the number of teeth 18 of the motor driving gear (88), modulus 0.6, reference circle are The metal gear of 18x0.6=10.8, so as to general;Remove planetary gear train, motor motor driving gear (88) and newly set Motor on driven shaft is engaged from gear (106), and the motor from gear (106) is the number of teeth 38, modulus 0.6, reference circle are 38x0.6=22.8 metal gear, motor driven ratio is 38/18;The motor matches out of gear with 14x5 bearing;It is described The sipes hole (106a) that motor is equipped with the uniformly distributed quartering out of gear is inserted into allow from the four wide pawl of tooth sleeve (100), institute Narrow slot hole (106c) of the motor equipped with the uniformly distributed quartering out of gear is stated to insert to allow from four fan pawls of tooth sleeve (100) Enter, four fan pawls are conducive to radiate;The other end from tooth sleeve (100) set there are four pusher dog so as to it is described new If motor driven axis on the female connector gear (102) that is equipped with mutually be formulated, the number of teeth of the female connector gear (102) is 12 and mould Number is 1.5, and the small bearing (103) is equipped in the female connector gear (102), interior to be inserted into the motor driven axis newly set;It is described from The outside of tooth sleeve (100) is equipped with big bearing, and the big bearing is located on reducing gearbox;It is filled on the motor driven axis newly set Have from tooth sleeve (100) and female connector gear (102), the number of teeth of the female connector gear (102) be 12 and modulus be 1.5, the length The other end of the other end of half rear axle and short half rear axle is respectively provided with laterally double groovings and lateral double groovings with civilian dress rear-wheel Gear is driven, the rear wheel drive gear is 14 tooth modules 2.5, and with the rear wheel drive cartridge driving gear in hay mower Rear-wheel gear ring (107) in rear-wheel, the number of teeth of the rear-wheel gear ring (107) are that 82 tooth modules 2.5 match big grass trimmer rear-wheel;It is described It is greater than 90 degree from the impeller Ye Dao exit blade angle of the fan of each fan pawl of tooth sleeve (100), is Forword vane Impeller fan;
The motor of retarder is equipped with circuit for controlling motor;Motor control part principle:
Integrated chip control program, the decoding of built-in chip type rotor-position are purchased in this system Brush-Less DC motor control part Device monitors three motor position sensors, to provide the correct timing on top, lower part power MOS driving, there is six step of all-wave to drive Dynamic function, peripheral three-phase drive device are integrated metal-oxide-semiconductor, and upper power switch is PMOS tube, and lower part power switch is NMOS tube, Integrated chip has overcurrent protection function, and R118 resistance is current of electric sampling resistor, and current sampling signal is by R117, R119 Chip current sampling end is sent to after partial pressure, when current sampling signal value is greater than 0.1V, overcurrent protection function activation, motor stops turning Dynamic, overcurrent protection set-point is:
Icurrent=0.1* (R117+R119)/(R118*R119)
When overcurrent events occur, the output of driving chip Fault Output pin is low level, and motor driven is believed Number OutputEnable signal drags down, and motor shuts down, and avoids machine loading electric current excessive and electronic device damage occurs, When Fault Output is low level, the end the B-E voltage of triode Q24 is also reduced to zero, is switched to cut-off shape by state State, BLADE_FAULT signal are that high level stops all motor operations after MCU receives BLADE_FAULT high level immediately: In addition to this this, MCU is additionally provided with second level software overcurrent protection function, so as under different load conditions, flexible handling machine fortune Action is made, and machine frequent shutdown is avoided,
Software overcurrent protection function can be described as follows:
Current of electric sampled signal BLADE_P8, after 7.8 times of operational amplifier operation amplifier, by amplified sampling Current analog signal BLADE_CRT signal, which gives MCU, to be had on the pin of analog-digital conversion function, by built-in analog-to-digital conversion list After member processing, analog current signal is converted to 12 digital current signals, the overcurrent threshold signal phase that this signal is arranged with MCU Compare, when current signal value is greater than overcurrent threshold value, execute run action when corresponding overcurrent,
Left and right movable motor overcurrent protection function having the same,
Current operator amplifying circuit:
Current amplification factor Counting Formula:
A=1+ (R7/R14) * Icurrent
It is promoted when occurring unusual condition such as machine collision, machine in motor operation course, when machine is overturn, these things occurs Coherent signal is fed back to MCU by the perceptron of part, and MCU is immediately performed brake function,
Specific action process is as follows:
When location bias occurs for the Hall sensor for detecting the above event, hall signal is switched to low electricity by high level Flat, MCU pin is detected to level change, and the BLADE_BRK signal of sending is switched to low level by high level, and process is following Inverter cricuit processing after, generate BLADE_P4 high level signal and give motor drive ic U13, actuating motor brake function, it is left, Right lateral leakage of electricity machine function having the same;
Driving chip also makes motor forward/reverse function, when machine operation in collide event when, machine execute after Function is moved back, specific action description is as follows:
When collision alarm is sent to MCU by Hall sensor, MCU will control the BLADE_DIR's in motor operation direction Signal is switched to high level by low level, after the processing of following inverter cricuit, generates low level BLADE_P7 signal to electricity Machine driving chip U13, motor switch inverted status by rotating forward, and machine executes fall back movement, and left and right movable motor has phase Same function;
Motor speed control principle:
For machine under different working conditions, motor operation speed is not also identical, it is therefore desirable to feed back the operation speed of motor Degree signal gives motor driven core U13, and this system design uses dedicated motor speed detection chip, to generate motor speed control Required feedback voltage, without expensive tachometer, this function is can be realized in U12;
It is described that the specific working principle is as follows:
Be motor driven chip U13 as electronics rotor position decoding Hall sensor output signal occur it is positive or negative Jump can make U12 generate the pulse of an amplitude and duration, and parameter is determined by non-essential resistance R101, C48, in U12 Pin 5 at output pulse by U13 error amplifier integrate, to generate a DC level, the level and motor speed Directly proportional, this velocity feedback voltage establishes PWM reference level at the pin 13 of U13, and is closed into feedback control loop, output driving The control signal of MOS, meanwhile, the PWM reference voltage at U13 pin 13 is fed back into the pin that MCU has analog-digital conversion function, So that MCU learns motor actual motion speed, and control voltage is adjusted according to the difference of actual motion velocity amplitude and setting value;
Interlock circuit is described as follows:
RMOT_DAC is that the target velocity of MCU output controls the voltage value, (amplification factor=1+ after operational amplifier amplifies R5/R12), send to the pin 11 of right movable motor driving chip, draw the difference of target velocity voltage Yu actual speed voltage After the amplification of chip interior error amplifier, the reference voltage signal RMOT_P6 that above-mentioned PWM is adjusted is exported at pin 13.
Benefit:Cutter blade for mowing machine and reducer gear and the processing of the carbon, nitrogen and boron of air-cooled inner shaft, gear shaft are empty pipes Shape, inside is logical so that outer blowing air is cooling;The harmonic gear flexbile gear driven rear axle drives retarder, uses brushless motor 20000 turns of revolving speed, 250 watts of power, 36 volts, 5 millimeters of shaft diameter of output;The number of teeth 18 of motor driving gear (88), modulus 0.6, Reference circle is 10.8;The motor gear of the number of teeth 18 of the motor driving gear (88) and three each numbers of teeth 18, moduluses 0.6 not only rotation but also be 4.3x33/12x28/12x28/26=4.3x6.9=around the public retarder resultant gear ratio along motor axis It 30 times, shares;The other end of the other end of half rear axle of length and short half rear axle is respectively provided with laterally double groovings and transverse direction With civilian dress rear wheel drive gear, the rear wheel drive gear is 14 tooth modules 2.5, and is driven with the rear wheel drive gear double groovings The dynamic rear-wheel gear ring (107) in hay mower rear-wheel, the number of teeth of the rear-wheel gear ring (107) are that 82 tooth modules 2.5 are matched Big grass trimmer rear-wheel.
Hay mower drives retarder with rear axle, because positioned at liftoff level ground only 25 millimeters of low ground potential, by price limit and by narrow Narrow limitation, so no-load voltage ratio is difficult to do greatly, rear-wheel has been finalized, modulus is big to be can not load, and modulus is small and grinds away quickly, object U.S. is inexpensive, also wants energy conservation and environmental protection, and driving in hay mower rear axle is always hard nut to crack on retarder, with electronic humorous Wave gear flexbile gear driven rear axle drives the garden equipment of retarder, and gear shaft is empty tubulose, and inside is logical so as to outer Blowing air is cooling;The garden equipment of the harmonic gear flexbile gear driven rear axle driving retarder, axis jackshaft is pipe with cold But, flexbile gear is conducive to noise reduction.
Gardens machine drives retarder without planet rear axle with electronic crossed helical gears, and gear shaft is empty tubulose, interior Portion is logical so that outer blowing air is cooling;Using brushless motor, from the impeller leaf of the fan of each fan pawl of tooth sleeve (100) Road exit blade angle is greater than 90 degree, is the fan of the impeller of Forword vane.Axis in gear is empty with cooling;Rear axle Driving the gardens machine of retarder to drive on retarder in hay mower rear axle is always a hard nut to crack, with electronic harmonic wave Gear flexbile gear driven rear axle drives the garden equipment of retarder, and gear shaft is empty tubulose, and inside is logical so as to outer logical Air is cooling;Gardens machine is conducive to utilize former widely used friendship without planet rear axle driving retarder with electronic crossed helical gears Wrong axis helical teeth wheel-speed regulating change box, only the former engine belt pulley of importation remove and be changed to motor and gear come power Remove driving crossed helical gears and rear axle;Because be staggered gear, therefore the installation site of motor and direction are with outside new cabinet Shell.
Bright spot is:
Gardens machine drives retarder without planet rear axle with electronic crossed helical gears, removes planetary system and is passed with staggered gear Dynamic, the conjunction containing peace on rear axle hangs link stopper (9la) rear axle driving gear (91) and uses staggeredly helical gear instead, and helix angle is 27 Degree;12 gears (104c) of 28 gears (104a) on second jackshaft use screw rod instead, on the rear axle described in change It is 5 with the transfer rear axle third transmission ratio between staggeredly helical gear;So resultant gear ratio is 5x28/26x28/12x28/12= 30, it shares just;The other end of the other end of half rear axle of length and short half rear axle is respectively provided with laterally double groovings and cross To double groovings with civilian dress rear wheel drive gear, the rear wheel drive gear is 14 tooth modules 2.5, and with the rear wheel drive gear Rear-wheel gear ring (107) of the driving in hay mower rear-wheel, the number of teeth of the rear-wheel gear ring (107) are 52 tooth modules 2.5 With small grass trimmer rear-wheel.Be conducive to set using a large amount of components and lathe of former widely used crossed helical gears gearbox It is standby.
Gardens intelligent grass-removing four planetary gear rear-guard moving gear box of three-level, which is characterized in that it is hay mower With four planetary gear meshing gear reduction gearbox (108) of three-level, brushless motor, 20000 turns of revolving speed, 150 watts of power, 36 are used Volt, 5 millimeters of shaft diameter of output, there is speed control circuit;The number of teeth of motor driving gear (88) is 20;The motor driving gear (88) four planetary gears (98) on the motor gear of the number of teeth 20, with the first order planet carrier of third-level planetary system are nibbled Transmission is closed, the gear uses helical gear, and helix angle is 12.7 degree;Four each numbers of teeth 19, modulus 0.6 both from Turn to be attached separately to around the planetary gear (98) of the public axis revolution along motor axis again respectively and the planet equidistant with public axis On four planet wheel spindles of frame (97);The motor gear of the number of teeth 20 is steel 40Cr;Four of the planetary gear (98) Planetary gear is polyformaldehyde SP500;It is engaged with planetary gear and the internal gear of the centre wheel of planetary system that geometrical axis is fixed It (99) is steel 40Cr, modulus is 0.6, and the number of teeth is 60, and the classification of the Planetary Gear Transmission is NGW type, and N is internal messing tooth Wheel, G is the composite gear among two gear Meshing Pairs, and W is external gear pump;The transmission ratio of the Planetary Gear Transmission is 1+ 60/20 is 4, meets transmission ratio recommendation 2.7 to 9, and transmission efficiency is percent 97-99;In on the first order planet carrier Four planetary gears (98) engaged transmission on heart output gear and second level planet carrier, the gear use helical gear, spiral shell Revolve lift angle be 12.7 degree, each number of teeth 19 of four of the second level, modulus 0.6 not only rotation again around along motor axis public axis public affairs The planetary gear (98) turned, be attached separately to respectively and on four planet wheel spindles of the planet carrier (97) equidistant with public axis;Institute Stating the center output gear on first order planet carrier is steel 40Cr, four planetary gears (98) on the planet carrier of the second level Four planetary gears are polyformaldehyde SP500;It is engaged with planetary gear and the internal tooth of the centre wheel of planetary system that geometrical axis is fixed Taking turns (99) is steel 40Cr, and modulus is 0.6, and the number of teeth is 60, and the classification of the Planetary Gear Transmission is also NGW type, and N is interior nibbles Gear is closed, G is the composite gear among two gear Meshing Pairs, and W is external gear pump;The Planetary Gear Transmission of the second level Transmission ratio be 1+60/19 be 3.16;Three on center output gear and third level planet carrier on the second level planet carrier A planetary gear (98) engaged transmission, the gear use helical gear, and helix angle is 12.7 degree, and three of the third level are each The number of teeth 18, modulus 0.6 not only rotation but also around along motor axis public axis revolution planetary gear (98), be attached separately to respectively And with public axis on three planet wheel spindles of equidistant planet carrier (97);Center output gear on the second level planet carrier It is steel 40Cr, three planetary gears of the number of teeth 18, modulus 0.6, three planetary gears (98) on the planet carrier of the third level are not Polyformaldehyde SP500's but steel 40Cr;It is engaged with planetary gear and the internal gear of the centre wheel of planetary system that geometrical axis is fixed It (99) is steel 40Cr, modulus is 0.6, and the number of teeth is 60, and the classification of the Planetary Gear Transmission is also NGW type, and N is internal messing tooth Wheel, G is the composite gear among two gear Meshing Pairs, and W is external gear pump;The Planetary Gear Transmission of the third level Transmission ratio is that 1+60/18 is 4.33;Above three-level resultant gear ratio is 4x3.16x4.33=55 times, 20000 turns/55=of revolving speed 360, it is furnished with speed control circuit, shares;More reasonable distribution torsional moments at different levels, the small position plastic gear of power, the big portion of power Position steel gear, especially uses helical gear, meshing characteristic is self-evident.
A kind of hay mower dallies monolithic hay knife after being contracted with safe overload, which is characterized in that it contains blade and deceleration The gear of device and noise elimination inner shaft is increased because wearing big, temperature, revolving speed is high, noise is big, protection must be handled due to be difficult to ensure longtime running after Processing, the gear shaft of retarder are tubuloses, retarder from gear drive inner shaft containing noise elimination (100a), so as to cooling of eliminating the noise; Retarder is with the air-cooled no planet rear axle driving retarder of electric gear inner shaft, and new be equipped with from gear shaft in the side containing motor is empty Tubulose, described be logical, one end of one end three-way motor, the inner via hole of one end inside gear shaft energy high speed rotation Gas lead to one end up to ten thousand for turning high-speed motor, the external energy of one end is rotatably provided with bearing and from tooth sleeve, described from tooth Wheel shaft includes the noise elimination inner shaft, and the inner via hole for including the noise elimination inner shaft its other end from gear shaft leads to retarder Outside is equipped with the noise elimination wedge of multiple hexagonal pyramid shapes, the noise elimination in the noise elimination inner shaft contained by the gear shaft The noise elimination wedge for multiple hexagonal pyramid shapes that the hollow pipe of the inner shaft of one end of the close motor of inner shaft is equipped with is intensive, institute It is dilute for stating the noise elimination wedge for multiple hexagonal pyramid shapes that the hollow pipe of the inner shaft of one end of the separate motor of noise elimination inner shaft is equipped with Thin, the middle part of the noise elimination inner shaft is equipped with isolation interconnecting piece so that one end connects the close motor of the slave gear shaft One end of the separate motor of slave gear shaft described in one end and the connection of its other end, to refer to Lighthill parameter and Richards The air-flow that the motor of the turbulence noise of noise comes, one end close to motor port through compressing, reflation enters from gear shaft, Multiple hexagonal pyramids that the hollow pipe of the inner shaft of one end of close motor of the air-flow of reflation through the noise elimination inner shaft is equipped with The intensive noise elimination wedge of shape recompresses and passes through after noise elimination inner shaft is slightly run again by the one of the separate motor of noise elimination inner shaft Second compression is then spilt into the sparse noise elimination wedge for multiple hexagonal pyramid shapes that the hollow pipe of the inner shaft at end is equipped with again again The inner via hole that the slave gear shaft includes the noise elimination inner shaft its other end leads to the outside of retarder, is recompressed with compression-expansion Reflation and the process for carrying out noise elimination noise reduction;Also cooling convenient for outer blowing air;Blade and reducer gear and the protection of noise elimination inner shaft Post-processing its gear and noise elimination inner shaft containing blade and retarder is mostly metal parts, using kelvin effect, workpiece is embedded in dilute It in soil, is post-processed with high-frequency current, special efficacy is self-evident.Workpiece also can be used titanizing aluminium and add rhenium, be placed on oxygen-containing Change yttrium, rare earth, indium, clay forming ceramic in, be equipped with same position width penetrate and laser scanning and manufacture.Blade also can be used in point of a knife Position fills knife blade.Or carbon fiber 3 D-printing also can be used in blade, then is put the first edge on a knife or a pair of scissors with diamond tool, place into printing carbon dust, The mixing of urea, borax buries in soil heat treatment and with frequency-conversion electromagnetic field and laser scanning and with platinum rhodium catalysis, makes its space lattice Dot matrix disperse;Blade or point of a knife position dress knife blade and first be put into nanoscale print carbon dust, urea, borax mixing bury soil Middle progress carbon, nitrogen and boron is simultaneously heat-treated with frequency-conversion electromagnetic field permeation;Blade fills knife blade at point of a knife position and is first put into nanoscale The mixing of printing carbon dust, urea, borax, which is buried, to be carried out carbon, nitrogen and boron and is heat-treated with frequency-conversion electromagnetic field permeation in soil;It is characterized in that, The mower blade is multiple tooth hay knife, and the cross section of the apical tooth (25) of the multiple tooth hay knife is equipped with to be stretched with steel plate punched The back of a bow out, the steel plate of hunchbacked two sides have certain angle, and the bottom of the back of a bow is polished to be formed and ground cutting edge (20), described The side of tooth is the arc containing equiangular spiral, equiangular spiral be logatithmic spiral its with pressure angle equal characteristic everywhere;It is used The upper die forming block (25a) and lower die forming blocks (25b) of steel plate punched stretching die are multiple equidistant or isogonism briquettings, steel used Plate is first annealed to quench again;It is polygonal pyramid shape that the mower blade, which sets wind wing honeycomb (29), and it is ellipse that middle part, which is equipped with through-hole (30), It is circular;The blade of the mower blade sets graphene plating indium;The blade of the mower blade is handled with laser quenching;Institute The crest line of polygonal pyramid shape and the angle of bottom surface for stating wind wing honeycomb are greater than 115 degree of infiltrations and climb angle θ;Match on the mower blade Siphon pipe is set, to reinforce cooling and lubricating and the comprehensive effect to grass.
Siphon pipe is configured on the mower blade, not only reinforces cooling and lubricating and the comprehensive effect to grass, Er Qieyou Promote the conversion of plant cell membrane channels to absorb the complementary effect for making careless fine and smooth growth, and make to eat cell membrane channels conversion it is fine and smooth at The more digestible high-end nutrient absorption effect of the stomach of the animal of long plant.Through blade and pipe combination of siphon fist to the grass of plant Effect, make in the gas sprayed and the mist of liquid mixing containing subset polymers, so as to human body and plant absorption;Mankind's hair A kind of existing transformation way is known as cell membrane channels, and there is a series of city gate of mass exchanges in cell membrane, a kind of city gate is only A certain molecule is allowed to enter and leave, people are referred to as cell membrane channels;The structure of matter of cell membrane aquaporin matter only allows water Molecule passes through, and has highly important effect, for example crucial filtration, aquaporin egg are just played in the kidney of people White epicyte protein is exactly aquaporin, and the composition of these substances is referred to as cell membrane aquaporin;The water of macromolecular mass structure is It is difficult to enter active somatic cell, the only small-micelle water of those short chain structures with similar liquid crystal, is just easier to enter Into the cell, life metabolic activity is participated in, and various ions are taken to ion channel in cell membrane and are entered into the cell;Pollution causes The water of degeneration, water clusters cohesion become larger, and therefore, active somatic cell is difficult to absorb;Water is not absorbed by cell, cannot be participated in A series of vital metabolic activities of living body;In addition, water clusters are small, activity is just big, and this water is all right to be drunk, and plant is also just more advantageous to The refinement growth of the grass of object, to also be conducive to eat the health status of the animals and humans of refinement growing plants;And water clusters Bigger activity is smaller, also just bad to drink;Also difficult to be absorbed by cell;Cutting and beating is higher-order of oscillation process;In same liquid, Flow velocity is big, and pressure is small;Flow velocity is small, and pressure is big, and fluid can flow to low pressure from high pressure automatically, multiple tooth when passing through the siphon pipe The through-hole of polygonal pyramid shape together with wind wing honeycomb and ellipse, to containing dew and repeatedly squeeze chopping grass in mowing chassis it is more Secondary puddling is just discharged into grass trimmer rear grass outlet mouth and is extruded into grass cutting collection box again, is that there are atomization process;Blade it is multiple tooth together with wind wing Many wedges of the volume change in oscillation of the turn-around chamber of the cavity of the polygonal pyramid shape of honeycomb, the polygonal pyramid shape filtered into noise reduction have It plays vacuolar membrane and forms mist from the noise reduction process then expanded and filtering and bubbling process is first compressed;Local acceleration and fluid Point unsteady motion causes unstable field and migration acceleration and change in location to cause uneven flow field, forms pulsation turbulent flow, Gradient and divergence and curl by mixed fluid are further change in and disperse and mix broken grass in spray form and wave in the wind undiscipline and open Come, the subset of formation leaves the stimulation that the grass of the plant of regrowth has had to cutaway portion;First compress reflation And it refines and is atomized the subset escaped again and be mixed into the booster action that broken grass has also had nursing.
The beneficial effects of the invention are as follows:The multiple tooth length that blade is considerably increased than straight knife, there are more folding swords and there are many Impact cutting angle and slip cutting angle;Material to be cut is flexible, and when single-blade makes careless phenomenon more, and rolls over sword more then to hug careless function stronger, favorably Structure is ground in the hunchbacked formula bottom of enhancing cutting straw and straw efficiency, shear blade, so that it is had wearability and saves power consumption, it is described The side of tooth be the arc containing equiangular spiral, equiangular spiral be logatithmic spiral its with pressure angle equal characteristic is conducive to everywhere Cutting;The upper die forming block (25a) and lower die forming blocks (25b) of steel plate punched stretching die used are multiple equidistant or isogonism pressures Block is convenient for punching press;It is polygonal pyramid shape that the mower blade, which sets wind wing honeycomb (29), and it is ellipse that middle part, which is equipped with through-hole (30), Truly have noise reduction booster action;The blade of the mower blade sets graphene plating indium;The blade of the mower blade, which is used, to swash Photoquenching processing;The crest line of polygonal pyramid shape and the angle of bottom surface of the wind wing honeycomb are greater than 115 degree of infiltrations and climb angle θ;It is described Siphon pipe is configured on mower blade, to reinforce cooling and lubricating and the comprehensive effect to grass, improves product quality;It is described to cut The liquid of the vitamin containing growth is oozed in the siphon pipe configured on careless machine knife blade, it is existing to mix broken careless supplementary feeding effect, and comfort Promoted the effect of growth by chaffcutter wound;When the blade high speed rotation of the grass trimmer, the ring week on the chassis of the blade of grass trimmer Equipped with more short soft mop cloth strips, air cushion is formed between lawn, makes knife wound less than grass roots;Grass trimmer front, which is equipped with, to be protected Dangerous thick stick (109), bumper are equipped with flexible comb, magnetic survey device and doppler detector are additionally provided with, with iron pipe in defense sector.
A kind of grass trimmer, grass trimmer control wheel are equipped with the 5G mobile phone positioned by Beidou, and energy remote-control mower is equipped with people Face and fingerprint recognition are to confirm the people to give an order for the first time or manned or automatic Pilot.Blade is multiple tooth hay knife, described more The side of the contrate of the apical tooth (25) of tooth hay knife is the arc containing equiangular spiral;The upper die forming of steel plate punched stretching die used Block (25a) and lower die forming blocks (25b) are multiple equidistant or isogonism briquettings;Siphon pipe is configured on blade, is set in the ring week on chassis There are more short soft mop cloth strips, forms air cushion between lawn;Bumper is equipped with flexible comb, is additionally provided with magnetic survey Device and doppler detector ooze the liquid of the vitamin containing growth in the siphon pipe configured on the mower blade, existing to stir It is acted on broken careless supplementary feeding, and comforts and promoted to grow by chaffcutter wound.
The blade of hay mower is multiple tooth hay knife, and the cross section of the apical tooth (25) of the multiple tooth hay knife, which is equipped with, uses steel The back of a bow that plate punching stretch goes out, the steel plate of hunchbacked two sides has certain angle, the bottom of the back of a bow is polished to be formed grinds cutting edge (20), the side of the tooth is the arc containing equiangular spiral, and equiangular spiral is that it is equal everywhere with pressure angle for logatithmic spiral Characteristic;The upper die forming block (25a) and lower die forming blocks (25b) of steel plate punched stretching die used are multiple equidistant or isogonisms Briquetting, steel plate used is first annealed to quench again;It is polygonal pyramid shape that the mower blade, which sets wind wing honeycomb (29), and middle part is equipped with and leads to Hole (30) is oval;The blade of the mower blade sets graphene plating indium;The blade laser of the mower blade Quenching treatment;The crest line of polygonal pyramid shape and the angle of bottom surface of the wind wing honeycomb are greater than 115 degree of infiltrations and climb angle θ;It is described to cut Siphon pipe is configured on careless machine knife blade, to reinforce cooling and lubricating and the comprehensive effect to grass;It is configured on the mower blade Siphon pipe in ooze the liquid of the vitamin containing growth, it is existing to mix broken careless supplementary feeding effect, and comfort and promoted by chaffcutter wound The effect of growth.
Beneficial effect is:Grass trimmer front is equipped with bumper (109), and bumper is equipped with flexible comb, is additionally provided with magnetic force spy Device and doppler detector are surveyed, with iron pipe in defense sector.The multiple tooth length that blade is considerably increased than straight knife has more folding swords and has A variety of impact cutting angles and slip cutting angle;It allows careless phenomenon more when the careless single-blade cut, and rolls over sword more then to hug careless function stronger, be conducive to increase Structure is ground at the hunchbacked formula bottom of strong cutting straw and straw efficiency, shear blade, so that it is had wearability and is saved power consumption, the tooth Side be the arc containing equiangular spiral, equiangular spiral be logatithmic spiral its with pressure angle equal characteristic is conducive to cut everywhere It cuts;The upper die forming block (25a) and lower die forming blocks (25b) of steel plate punched stretching die used are multiple equidistant or isogonism briquettings Convenient for punching press;It is polygonal pyramid shape that the mower blade, which sets wind wing honeycomb (29), and it is oval that middle part, which is equipped with through-hole (30), Truly have noise reduction booster action;The blade of the mower blade sets graphene plating indium;The blade laser of the mower blade Quenching treatment;Improve product quality.
Referring to:Figure 67 is the schematic diagram of the high tension protection circuit of the grass trimmer with protective device, also referred to as overvoltage protection electricity Road;Figure 68 is the schematic diagram of the low-voltage protection circuit of the grass trimmer with protective device, also referred to as under-voltage protecting circuit;Figure 69 is band The schematic diagram of the voltage conversion circuit of the grass trimmer of protective device.The grass trimmer of tool protection circuit, which is characterized in that this circuit tool There is over-voltage protecting function main purpose to be that circuit power is protected to carry out circuit power cutting when overtension, utilizes voltage-stabiliser tube Reverse breakdown principle protected;ZM4743A, ZM4735A, ZM4732A are 13V/1W, 6.2V/1W, 4.7V/1W respectively Voltage-stabiliser tube, the forward characteristic of voltage-stabiliser tube is identical as general-purpose diode, and reverse characteristic is more special:When backward voltage is added to When to a certain degree, although pipe is presented breakdown conditions and is not damaged by larger current, and the repeatability of this phenomenon is very It is good;In turn, as long as pipe is in breakdown conditions, although the electricity for flowing through pipe is very big in variation, and the voltage at pipe both ends But it changes very little and plays pressure stabilization function;When voltage is more than the pressure stabilizing value of ZM4743A voltage-stabiliser tube, then D37, D40, R235 and Q34 Generation circuit in circuit, triode ON, High_V_Fault are low level, this electric potential signal is then fed back into MCU, are given MCU is handled, and certain measure is carried out, and others are also such;It is additionally provided with under-voltage protecting circuit, when circuit voltage is less than setting It is protected when value, the principle of comparator is utilized;LM224 is four road operational amplifiers, and amplifier is inputted one end and is set as benchmark Value, another input terminal are set as fiducial value, and output end is without feedback, then wirelessly amplification and output are supply voltage value (VCC) , it is worth on the basis of being held in this circuit in the same direction, backward end is fiducial value, and when the voltage of backward end is greater than end in the same direction, exporting is 0, instead It is just supply voltage, one high and one low signal in this way forms logic circuit, by the switch of triode by the signal of LOW_V_Fault It is transmitted to MCU, MCU is handled according to signal.
Shell point:
The grass trimmer of tool protection circuit, grass trimmer control wheel are equipped with the 5G mobile phone positioned by Beidou, can be remotely controlled mowing Machine, equipped with face and fingerprint recognition to confirm the people to give an order for the first time or manned or automatic Pilot.This circuit has over-voltage Defencive function main purpose is that protection circuit power carries out circuit power cutting when overtension, utilizes the reversed of voltage-stabiliser tube Puncture principle to be protected;It is additionally provided with under-voltage protecting circuit, is protected when circuit voltage is less than setting value, ratio is utilized Compared with the principle of device;LM224 is four road operational amplifiers, and amplifier is inputted one end and is set as a reference value, another input terminal is set as comparing Compared with value, output end is without feedback, then wirelessly amplification and output are supply voltage value (VCC), signal composition one high and one low in this way The signal of LOW_V_Fault is transmitted to MCU by the switch of triode by logic circuit, and MCU is handled according to signal.

Claims (1)

1. the grass trimmer of tool protection circuit, grass trimmer control wheel are equipped with the 5G mobile phone energy remote-control mower positioned by Beidou, Equipped with face and fingerprint recognition to confirm the people to give an order or manned or automatic Pilot;Gear shaft containing retarder is pipe Shape and retarder from gear drive inner shaft containing noise elimination (100a), so as to cooling of eliminating the noise;The retarder is containing new by motor Equipped with being empty tubulose from gear shaft, inside is logical so that outer blowing air is cooling, and gear is herringbone bear;Brushless electricity 250 watts of 20000 turns of every point of revolving speed, the power of machine, 36 volts, 5 millimeters of shaft diameter of output;The number of teeth 18 of motor driving gear (88), Modulus 0.6, reference circle are 18x0.6=10.8;Remove planetary gear train, the motor driving gear (88) and the motor that newly sets from Motor on moving axis is engaged from gear (106), and the motor from gear (106) is the number of teeth 38, modulus 0.6, reference circle are 38x0.6=22.8, motor driven ratio is 38/18;The motor matches out of gear with 14x5 bearing;The motor newly set Equipped with from tooth sleeve (100) and female connector gear (102) on driven shaft, the number of teeth of the female connector gear (102) be 12 and modulus be 1.5, the female connector gear is 28, modulus with the number of teeth as 2812 Double-gears (104) on output gear and the first jackshaft It is 1.5, reference circle is that 28 gears of 28x01.5=42 are meshed, the output gear and first of the motor driven axis newly set Jackshaft transmission ratio is 28/12;The above transmission ratio is 38/18x28/12=4.9, is more than planet no-load voltage ratio 4.33, actually shares;Its Remaining no-load voltage ratio is roughly the same;2812 Double-gear (104) is containing 28 gears (104a) of the 28 coaxial numbers of teeth and 12 teeth of 12 numbers of teeth It takes turns (104c), the both ends of 2812 Double-gear (104) are respectively provided with small bearing (103), and the outer diameter of the small bearing (103) is 14mm, so as to the inner hole at the both ends with 2812 Double-gear (104), the internal diameter of the small bearing (103) be 5 so as to The first jackshaft activity assembly;Identical 2812 Double-gear (104) of another structure is also containing the 28 coaxial numbers of teeth 12 gears (104c) of 28 gears (104a) and 12 numbers of teeth, on the second jackshaft, the both ends of 2812 Double-gear (104) It is respectively provided with small bearing (103), the outer diameter of the small bearing (103) is 14mm, so as to the both ends with 2812 Double-gear (104) Inner hole, the internal diameter of the small bearing (103) be 5 so as to the second jackshaft activity assemble;Among described first 12 gears (104c) of 12 numbers of teeth of coaxial 28 gears (104a) in 28 numbers of teeth of 2812 Double-gears (104) on axis with it is described 28 gears of identical 2812 Double-gear (104) of another structure also containing the 28 coaxial numbers of teeth on second jackshaft (104a) is meshed, 28 gears (104a) on second jackshaft and 2812 Double-gears on first jackshaft (104) it is 2.33 that the second axis transmission ratio between 12 gears (104c) of 12 numbers of teeth, which is 28/12,;2812 Double-gear (104) 28 gears (104a) containing the 28 coaxial numbers of teeth and 12 gears (104c) of 12 numbers of teeth are to use polyformaldehyde in injection mold Machine-shaping;The rear axle output par, c of the retarder is containing coaxial half rear axle of length and short half rear axle, half rear axle of length On be sequentially arranged with rear axle driving reducing gearbox oil sealing, peace close elastic clip (92), iron washer, safety clutch cone (90), hang shelves disk (101), it closed containing peace and hangs link stopper (91a) rear axle driving gear (91), press from both sides axis in long axis, half rear axle of length is equipped with radial cross-drilled hole It is connected with will pass through lateral pin nail with safety clutch cone (90), the peace closes elastic clip (92) and sandwiches the safety clutch cone (90) and the extension shelves disk (101), the safety clutch bore (90) and the extension shelves disk (101) and the conjunction containing peace extension link stopper (91a) rear axle driving gear (91) is connected, and one end of half rear axle of length is equipped with axial deep hole, presss from both sides to be inserted into the long axis Axis is inserted into the axial deep hole that one end of short half rear axle is equipped with and makes half rear axle of length and the short half rear axle activity phase Connection;It is sequentially arranged with rear axle driving retarder upper cover and oil sealing on short half rear axle, is also successively filled with another set of peace conjunction elasticity It presss from both sides (92), iron washer, safety clutch cone (90), hang shelves disk (101), also be provided with radial cross-drilled hole on short half rear axle will pass through Lateral pin nail is connected with another set of safety clutch cone (90), and the another set of peace closes elastic clip (92) and sandwiches the peace (90) and the extension shelves disk (101) are bored in full clutch, safety clutch cone (90) and the extension shelves disk on short half rear axle (101) also link stopper (91a) rear axle driving gear (91) is hung with unique conjunction containing peace above-mentioned to be connected;Described close containing peace hangs shelves The number of teeth of block (91a) rear axle driving gear (91) is 33 teeth and modulus is 2.5;28 gears (104a) on second jackshaft 12 numbers of teeth 12 gears (104c) and the rear axle on it is described containing peace close hang link stopper (91a) rear axle driving gear (91) between Transfer rear axle transmission ratio be 33/12 for 2.75;Retarder resultant gear ratio is 4.3x33/12x28/12x28/26=4.3x6.9 It=30 times, shares;It is characterized in that, the number of teeth 18 of the motor driving gear (88), modulus 0.6, reference circle are 18x0.6= 10.8 metal gear, so as to general;Remove planetary gear train, on the motor driving gear (88) and the motor driven axis newly set Motor engaged from gear (106), the motor from gear (106) is the number of teeth 38, modulus 0.6, reference circle are 38x0.6= 22.8 metal gear, motor driven ratio is 38/18;The motor matches out of gear with 14x5 bearing;The motor is from tooth The sipes hole (106a) of the uniformly distributed quartering is equipped in wheel to be inserted into allow from the four wide pawl of tooth sleeve (100), the motor from The narrow slot hole (106c) that the uniformly distributed quartering is equipped in gear is inserted into allow from four fan pawls of tooth sleeve (100), and described four A fan pawl is conducive to radiate;The other end from tooth sleeve (100) set there are four pusher dog so as to the motor newly set The female connector gear (102) being equipped on driven shaft is mutually formulated, the number of teeth of the female connector gear (102) be 12 and modulus be 1.5, The small bearing (103) is equipped in the female connector gear (102), it is interior to be inserted into the motor driven axis newly set;It is described from tooth sleeve (100) outside is equipped with big bearing, and the big bearing is located on reducing gearbox;It is equipped on the motor driven axis newly set from tooth Sleeve (100) and female connector gear (102), the number of teeth of the female connector gear (102) be 12 and modulus be 1.5, half rear axle of length The other end and short half rear axle the other end be respectively provided with laterally double groovings and laterally double groovings with civilian dress rear wheel drive tooth Wheel, the rear wheel drive gear are 14 tooth modules 2.5, and with the rear wheel drive cartridge driving gear in hay mower rear-wheel Rear-wheel gear ring (107), the number of teeth of the rear-wheel gear ring (107) is that 82 tooth modules 2.5 match big grass trimmer rear-wheel;It is described from tooth set The impeller Ye Dao exit blade angle of the fan of each fan pawl of cylinder (100) is greater than 90 degree, is the impeller of Forword vane Fan;It has cold wind effect;The motor of retarder is equipped with circuit for controlling motor;Motor control part principle:
Integrated chip control program, built-in chip type rotor-position decoder, prison are purchased in this system Brush-Less DC motor control part Three motor position sensors are controlled, to provide the correct timing on top, lower part power MOS driving, there is six step of all-wave to drive function Can, peripheral three-phase drive device is integrated metal-oxide-semiconductor, and upper power switch is PMOS tube, and lower part power switch is NMOS tube, is integrated Chip has overcurrent protection function, and R118 resistance is current of electric sampling resistor, after current sampling signal is divided by R117, R119 It is sent to chip current sampling end, when current sampling signal value is greater than 0.1V, overcurrent protection function activation, motor stalls, mistake Flowing protection setting point is:
Icurrent=0.1* (R117+R119)/(R118*R119)
When overcurrent events occur, the output of driving chip Fault Output pin is low level, by motor drive signal OutputEnable signal drags down, and motor shuts down, and avoids machine loading electric current excessive and electronic device damage occurs, when When Fault Output is low level, the end the B-E voltage of triode Q24 is also reduced to zero, is switched to off state by state, BLADE_FAULT signal is that high level stops all motor operations after MCU receives BLADE_FAULT high level immediately;It removes Outside this this, MCU is additionally provided with second level software overcurrent protection function, so as under different load conditions, flexible handling machine operation Movement, avoids machine frequent shutdown,
Software overcurrent protection function can be described as follows:
Current of electric sampled signal BLADE_P8, after 7.8 times of operational amplifier operation amplifier, by amplified sample rate current Analog signal BLADE_CRT signal, which gives MCU, to be had on the pin of analog-digital conversion function, at built-in AD conversion unit After reason, analog current signal is converted to 12 digital current signals, this signal is compared with the overcurrent threshold signal that MCU is arranged Compared with, when current signal value be greater than overcurrent threshold value when, execute run action when corresponding overcurrent.
Left and right movable motor overcurrent protection function having the same, current operator amplifying circuit:
Current amplification factor Counting Formula:
A=1+ (R7/R14) * Icurrent
It is promoted when occurring unusual condition such as machine collision, machine in motor operation course, when machine is overturn, these events occurs Coherent signal is fed back to MCU by perceptron, and MCU is immediately performed brake function,
Specific action process is as follows:
When location bias occurs for the Hall sensor for detecting the above event, hall signal is switched to low level, MCU by high level Pin is detected to level change, and the BLADE_BRK signal of sending is switched to low level by high level, by reverse phase electricity below After the processing of road, generates BLADE_P4 high level signal and give motor drive ic U13, actuating motor brake function, left and right walking electricity Machine function having the same;
Driving chip also makes motor forward/reverse function, when machine operation in collide event when, machine execute retreat function Can, specific action description is as follows:
When collision alarm is sent to MCU by Hall sensor, MCU will control the signal of the BLADE_DIR in motor operation direction High level is switched to by low level, after the processing of following inverter cricuit, low level BLADE_P7 signal is generated and is driven to motor Dynamic chip U13, motor switch inverted status by rotating forward, and machine executes fall back movement,
Motor speed control principle:
For machine under different working conditions, motor operation speed is not also identical, it is therefore desirable to feed back the speed of service letter of motor Number give motor driven core U13, this system design use dedicated motor speed detection chip, to generate needed for motor speed control Feedback voltage, without expensive tachometer, this function is can be realized in U12;
It is described that the specific working principle is as follows:
It is motor driven chip U13 and positive or negative jump occurs as the Hall sensor output signal of electronics rotor position decoding Become, U12 can be made to generate the pulse of an amplitude and duration, parameter is determined by non-essential resistance R101, C48, U12's At pin 5 output pulse by U13 error amplifier integrate, with generate a DC level, the level and motor speed at Direct ratio, this velocity feedback voltage establishes PWM reference level at the pin 13 of U13, and is closed into feedback control loop, output driving The control signal of MOS, meanwhile, the PWM reference voltage at U13 pin 13 is fed back into the pin that MCU has analog-digital conversion function, So that MCU learns motor actual motion speed, and control voltage is adjusted according to the difference of actual motion velocity amplitude and setting value;
Interlock circuit is described as follows:
RMOT_DAC is that the target velocity of MCU output controls the voltage value, (amplification factor=1+R5/ after operational amplifier amplifies R12), send to the pin 11 of right movable motor driving chip, draw the difference of target velocity voltage and actual speed voltage through core After the amplification of piece internal error amplifier, the reference voltage signal RMOT_P6 that above-mentioned PWM is adjusted is exported at pin 13;It is described The gear and noise elimination inner shaft of hay mower blade and retarder are increased because wearing big, temperature, revolving speed is high, noise is big, is difficult to ensure length Phase runs and must handle protection post-processing, and the gear shaft of retarder is tubulose, and retarder contains in noise elimination from gear drive Axis (100a), so as to cooling of eliminating the noise;Retarder is to drive retarder with the air-cooled no planet rear axle of electric gear inner shaft, containing electronic Newly being equipped with by machine from gear shaft is empty tubulose, and described is logical, one end energization inside gear shaft energy high speed rotation One end of machine, the gas of the inner via hole of one end lead to one end up to ten thousand for turning high-speed motor, and the external energy of one end is rotatably provided with axis Hold and from tooth sleeve, it is described to include the noise elimination inner shaft from gear shaft, it is described from gear shaft include the noise elimination inner shaft its The inner via hole of the other end leads to the outside of retarder, is equipped with multiple six ribs in the noise elimination inner shaft contained by the gear shaft The noise elimination wedge of taper, multiple hexagonal pyramids that the hollow pipe of the inner shaft of one end of the close motor of the noise elimination inner shaft is equipped with The noise elimination wedge of shape be it is intensive, the hollow pipe of the inner shaft of one end of the separate motor of the noise elimination inner shaft is equipped with multiple The noise elimination wedge of hexagonal pyramid shape be it is sparse, the middle part of the noise elimination inner shaft is equipped with isolation interconnecting piece so that described in one end connection Slave gear shaft close motor one end and the separate motor of its other end connection slave gear shaft one end, to join Examine the turbulence noise of Lighthill parameter and Richards's noise motor come air-flow, close to motor one end port through pressing Contracting, reflation enter from gear shaft, and the air-flow of reflation is through the hollow of the inner shaft of one end of the close motor of the noise elimination inner shaft The intensive noise elimination wedge for multiple hexagonal pyramid shapes that pipe is equipped with recompresses and passes through after noise elimination inner shaft is slightly run and pass through again The sparse noise elimination wedge for multiple hexagonal pyramid shapes that the hollow pipe of the inner shaft of one end of the separate motor of noise elimination inner shaft is equipped with Second compression then spills into the logical retarder of inner via hole that the slave gear shaft includes its other end of the noise elimination inner shaft again again Outside, with compression-expansion recompresses reflation and carries out the process of noise elimination noise reduction;Also cooling convenient for outer blowing air;Blade and subtract It is mostly metal parts that fast device gear and the protection of noise elimination inner shaft, which post-process its gear and noise elimination inner shaft containing blade and retarder, is utilized Kelvin effect is post-processed with high-frequency current;Using single blade component, it can be realized three kinds of functions:Grass trimmer is practical to mow When, blade will not skid;Maximum output torque is 11.87NM;When the practical mowing of grass trimmer, the condition that blade will not skid is: Slipping torque of the blade on tool apron is greater than the maximum output torque 11.87NM of engine;Slipping torque of the blade on tool apron It can be measured by this method:By blade fastening bolt with the torque locking of 45NM, then engine flywheel is blocked, then is used Thrust meter pushes blade, and records the skidding power of blade;Blade slipping torque=skidding power x tests the arm of force;Pass through the above method It measures:Blade slipping torque=185*0.205=37.9NM;Blade slipping torque is about 3 times of engine output torque;This is protected Grass trimmer is demonstrate,proved when normal mowing or high load capacity are mowed, blade will not lose the connection with tool apron, and blade will not skid;When cutting When the blade of careless machine knocks barrier, blade can skid;When blade knocks the barriers such as stone, this moment impact to blade Torque is very big, can be far longer than blade slipping torque 37.9NM;At this point, exactly because this structure of single blade component designs, Blade can skid on tool apron automatically, to reduce shock to impact force caused by engine, avoid engine damage;Grass trimmer After mowing for a long time, the function of blade assembly will not fail;It looks up from undersurface of bottom disc, direction of rotation when blade work is inverse Clockwise, the direction for tightening blade fastening bolt is clockwise;Such design ensure that grass trimmer in the mistake of work Cheng Zhong, the locking torque of blade fastening bolt have the tendency that becoming larger;Locking torque without blade fastening bolt is more next It is smaller so that the case where blade loosens;Grass trimmer measures the power for unscrewing blade fastening bolt after actually mowing using 20 hours Square is 48NM;This numerical value, slightly larger than the torque 45NM of blades fastening bolt;48NM this test data, real example are cut In the process of work, the locking torque of blade fastening bolt has the tendency that becoming larger careless machine;This effect, it is ensured that mowing captain After time mows, the function of blade assembly will not fail;There are two flanged structures on common its mounting plane of common tool apron.This Kind structure, does not have overload protection function;When blade knocks the barriers such as stone, engine damage is easily led to;The hilted broadsword Piece component was not only able to satisfy the demand actually mowed, but also had the function of overload protection;Subsequent, this blade assembly mechanism can examine Worry is promoted the use of on the grass trimmer of other models;Using kelvin effect, metal works are embedded in rare earth, with high-frequency current into Row post-processing;Its gear and noise elimination inner shaft containing blade and retarder is mostly metal parts, and using kelvin effect, workpiece is embedded in It in rare earth, is post-processed with high-frequency current, special efficacy is self-evident;Workpiece adds rhenium using titanizing aluminium, is placed on containing oxidation Yttrium, rare earth, indium, clay forming ceramic in, be equipped with same position width penetrate and laser scanning and manufacture;Blade is beaten with carbon fiber three-dimensional Print, then put the first edge on a knife or a pair of scissors with diamond tool, the mixing for placing into nanoscale printing carbon dust, urea, borax, which is buried, to be heat-treated in soil and uses frequency conversion Electromagnetic field and laser scanning and with platinum rhodium catalysis, make its space lattice dot matrix disperse;Blade fills knife blade at point of a knife position And the mixing for being first put into nanoscale printing carbon dust, urea, borax buries and carries out carbon, nitrogen and boron in soil and at frequency-conversion electromagnetic field permeation heat Reason;The mower blade is multiple tooth hay knife, and the cross section of the apical tooth (25) of the multiple tooth hay knife, which is equipped with, uses steel plate punched The stretched back of a bow, the steel plate of hunchbacked two sides have certain angle, and the bottom of the back of a bow is polished to be formed and grinds cutting edge (20), institute The side for the tooth stated is the arc containing equiangular spiral, equiangular spiral be logatithmic spiral its with pressure angle equal characteristic everywhere; The upper die forming block (25a) and lower die forming blocks (25b) of steel plate punched stretching die used are multiple equidistant or isogonism briquettings, institute It is first annealed with steel plate and is quenched again;It is polygonal pyramid shape that the mower blade, which sets wind wing honeycomb (29), and middle part is equipped with through-hole (30) It is oval;The blade of the mower blade sets graphene plating indium;At the laser quenching of the blade of the mower blade Reason;The crest line of polygonal pyramid shape and the angle of bottom surface of the wind wing honeycomb are greater than 115 degree of infiltrations and climb angle θ;The mowing machine knife On piece configures siphon pipe, to reinforce cooling and lubricating and the comprehensive effect to grass;The siphon configured on the mower blade The liquid of the vitamin containing growth is oozed in pipe, it is existing to mix broken careless supplementary feeding effect, and have to comfort and growth is promoted by chaffcutter wound Effect;When the mower blade high speed rotation, it is equipped with more short soft mops the ring week on the chassis of the blade of grass trimmer Air cushion is formed between cloth, with lawn, makes knife wound less than grass roots;Grass trimmer front is equipped with bumper (109), and bumper is equipped with Flexibility comb, is additionally provided with magnetic survey device and doppler detector, with iron pipe in defense sector;It is characterized in that, this circuit has over-voltage Defencive function main purpose is that protection circuit power carries out circuit power cutting when overtension, utilizes the reversed of voltage-stabiliser tube Puncture principle to be protected;ZM4743A, ZM4735A, ZM4732A are 13V/1W, the pressure stabilizing of 6.2V/1W, 4.7V/1W respectively Pipe, the forward characteristic of voltage-stabiliser tube is identical as general-purpose diode, and reverse characteristic is more special:When backward voltage is added to certain journey When spending, although pipe is presented breakdown conditions and is not damaged by larger current, and repeatability is good for this phenomenon;Anti- mistake , as long as pipe is in breakdown conditions, although the electricity for flowing through pipe is very big in variation, and the voltage at pipe both ends changes pole It is small to play pressure stabilization function;When voltage is more than the pressure stabilizing value of ZM4743A voltage-stabiliser tube, then D37, D40, R235 and Q34 are produced in circuit Raw circuit, triode ON, High_V_Fault is low level, this electric potential signal is then fed back into MCU, is given at MCU Reason, carries out certain measure, and others are also such;It is additionally provided with under-voltage protecting circuit, is carried out when circuit voltage is less than setting value Protection, is utilized the principle of comparator;LM224 is four road operational amplifiers, and amplifier is inputted one end and is set as a reference value, another Input terminal is set as fiducial value, and output end is without feedback, then wirelessly amplification and output are supply voltage value (VCC), in this circuit It is worth on the basis of end in the same direction, backward end is fiducial value, and when the voltage of backward end is greater than end in the same direction, exporting is 0, anyway for power supply electricity Pressure, signal one high and one low in this way form logic circuit, the signal of LOW_V_Fault are transmitted to MCU by the switch of triode, MCU is handled according to signal.
CN201810464673.0A 2018-05-10 2018-05-10 The grass trimmer of tool protection circuit Pending CN108811683A (en)

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Application publication date: 20181116