CN1105323A - Mini-vehicle assistor with rear wheel driven directly - Google Patents

Abstract

The assistor has an engine with better low-speed dynamic performance. The speed-reducing transmission mechanism for start composed of primary and start clutches and two-stage speed reducing system is integrally installed in speed reducing box connected to right crank shaft box of engine. Wheel hub assemblage is integrated with transmission mechanism and back brake unit is sleeved to hub base. The rear wheel is directly installed to hub via splined set. Its advantages include easy maintenance, and good dynamic behaviour, reliability and durability.

Description

Mini-vehicle assistor with rear wheel driven directly

The present invention relates to the direct drive unit of wheel, mini-vehicle assistor with rear wheel driven directly especially, the power when its is fit to autocycle (hereinafter to be referred as mini-motorcycle) as powered travel.

Existing wheel direct drive unit as the main disadvantage of Chinese patent CN 85101503 and CN86102809A is:

1, fails to provide a kind of suitable mini-motorcycle adapted, have the driving engine of good low-speed dynamic property.Existing explicit stipulation, the speed of a motor vehicle of mini-motorcycle should be limited in the 25Km/h, desires to reach this purpose, or is the rotating speed that reduces driving engine, or is to increase transmitting ratio.Because prior art is a high speed engine, as drop engine speed is used, then the dynamic property of driving engine descends; As adopt the big speed ratio reduction of speed, then driving system is difficult to realize miniaturization.In a word, in the prior art, can not fundamentally overcome the weakness of its low engine speed tractive performance difference.

2, the axial dimension of wheel hub is bigger, and the deviation of gravity center vehicle center of driving engine and actuating device is far away, fails fundamentally to solve the equilibrium problem of two-wheel vehicles.

3, the satellite gear deceleration system is arranged in the wheel hub, makes that the radial dimension of wheel hub is bigger, and the inner structure complexity is made troubles to making; Inner gear is fixed on the rear axle, because rear axle does not rotate, so the normal component that is produced when satellite gear and inner gear engagement can be passed to rear axle by inner gear, make rear axle bear the effect of a moment of torsion, rear axle is the tubular member of hollow in addition, is subjected to wheel hub inner structure and standard-sized restriction, and its diameter of axle size is less, so the rear axle of elongated hollow very easily is subjected to twisting strain, even fracture appears; The nut at rear axle two ends is loosening easily simultaneously, is difficult to that rear axle is fastened on car and sticks.

4, starting clutch is one " as interior circle, the endoporus of miniature gears is as the roller-type overrunning clutch of wedyed disc with bent axle ".The starting clutch of this structure not only accuracy requirement is very high, the manufacturability complexity, and manufacture difficulty is big, and because of the influence of engine cylinder compressed pressure, roller very easily skids, and makes engine starting unreliable.

5, the power clutch in the driving system is one " as wedyed disc, the wheel hub inner arm is as the roller-type overrunning clutch of overriding clutch cylindrical with the wheel arm of satellite gear speed reduction gearing ".The power clutch of this structure, except the disadvantage that exists starting clutch equally, and since torque rating that power clutch transmitted will be compared with the torque rating that dynamic clutch transmitted big manyfold, so the running surface of parts very easily weares and teares, roller is very easily cracked, and its reliability is very poor.

6, " big gear wheel of full depth tooth wheel set is divided into wheel rim and wheel hub two parts in the driving system; connect by the spring collar in the middle of it ", large and small again gear pair is a pair of helical wheel, the axial force that is produced during work, and it is moving and cause fault to cause big gear wheel heavy curtain to occur.

7, drop-gear box internal cause driving engine conducts heat and the heat-producing result of Transmission self pivoting friction, and the interior oil atmospheric pressure must be higher than extraneous bar pressure, even taked oil sealing measure preferably, is difficult to also guarantee that in-to-in machine oil is toward exosmosing.Prior art fails to solve the problem of drop-gear box seepage machine oil.

8, walk helper and ordinary bicycle are equipped, and the intensity of steel wire of vehicle frame, chain stay and trailing wheel seems inadequately, and the vibrations of vehicle are big, and ride comfort is bad.Prior art fails to provide a kind of mini-motorcycle that meets operating needs.

……。

The present invention is directed to the problems referred to above, carry out new system design, purpose is to provide a kind of low engine speed tractive performance good, Hub assembly radially little with axial dimension, rear axle does not bear moment, master clutch, starting clutch, power clutch, the mini-vehicle assistor with rear wheel driven directly of denture clutch and I and II deceleration system reliable durable and be equipped with this walk helper and good rigidly vehicle frame, chain stay and trailing wheel, the intensity height, during powered travel vibrations little, the trailing wheel direct drive formula mini-motorcycle that noise is low.

The present invention realizes in the following manner: driving engine is a kind of single cylinder, horizontal, natural air cooled, mixed lubrication, flute spring valve air inlet, the scavenging of crankcase ternary, capacitive strike non-contact electronic ignition, the special-purpose spark ignition engine of two strokes; By the automatic centrifugal slider oil-bath type of full floating master clutch, the unidirectional click formula starting clutch of often opening, formula two satellite gear one-level deceleration systems are all carried in full floating, the start and deceleration transmission device that the large and small straight gear double reduction of angular deflection system is formed, concentrate be assemblied in drop-gear box that engine right crankcase links to each other in, add gear box cover and seal; Unidirectional normally closed click formula power clutch has the right angle and tiltedly carries on the back trapezoidal toothed denture clutch and spline pair etc., is contained in the wheel hub that does not have floral disc; Hub assembly partly enters in the drop-gear box by being riveted on the hub seat hole on the gear box cover assembly, realizes the combination with the start and deceleration transmission device, allows it support each other and relies on each other; Back brake component is sleeved on the hub seat, and the trailing wheel of the tabular Spoke structure of depressed is installed on the wheel hub by spline pair; Mini-motorcycle is on the basis of ordinary bicycle, vehicle frame is separated with chain stay and do and strengthen design, and axis and support are improved, and has installed forward and backward Shock absorber additional, sets up illumination, sound equipment and signal device etc.; The rear axle of walk helper is fastened on the chain stay mouth of axletree firmly, adopts flexible coupling method to prevent that walk helper from rotating around rear axle.

Principle of work of the present invention is as follows:

Step on manpower and to step on pedal, or the vehicle of carrying out riding, the trailing wheel forward direction is rolled, because of trailing wheel links to each other by spline pair with wheel hub, so wheel hub rotates around rear axle together with trailing wheel, again because of female splines and wheel hub are that close fit connects, and female splines is the spline pair that pair of matched is closed with the male splines of ratchet wheel initiatively, so the rotation of trailing wheel drives the rotation of driving claw wheel; At this moment touch priming handle, then start lever under the traction of starting steel cable, promote the starting push rod, the starting push rod is passed to needle roller with power, and needle roller drives the active ratchet wheel again and slides left along the needle roller guide groove on the rear axle; Slide left and in the rear axle rotating process at the active ratchet wheel, realize engaging with the driven ratchet wheel that is positioned at its left side; Because driven ratchet wheel keeps off gear with a left side and connects firmly together, so left side retaining gear rotates with the rotation of driven ratchet wheel, left side retaining gear drives miniature gears again and does the speedup rotation; Again because miniature gears is that the conical surface connects firmly with starting sour jujube cover, so starting sour jujube cover is done to rotate synchronously with miniature gears, start the ratchet and very heavy joint of starting of sour jujube cover left end simultaneously, the right crank rotation of driving engine that promotes the active hub and connect firmly with the active hub, magneto generator energising igniting this moment, carburettor fuel feeding, driving engine just can start.

Behind the engine starting, open the throttle wide can make engine speed increase, when rotating speed during greater than idling, master clutch engages, and rotating speed is high more, engaging force is big more, this moment starting clutch very heavy, under its action of centrifugal force, overcome its back very heavy spring elastic force and hide in epitrochoidal chamber, the ratchet with starting sour jujube cover does not contact, and makes starting clutch be in released state; Under the drive of master clutch engaging force, the sun wheel that is connected as a single entity with the driven drum of master clutch is also along with rotation, after planetary gear device carries out the one-level deceleration, motion is reached the double reduction system, again through large and small gear double reduction, motion is reached power clutch, and the direct drive trailing wheel advances, and carries out powered travel.

The pawl type of denture clutch of the present invention is that stepped tooth is tiltedly carried on the back at unidirectional right angle, behind engine starting, as have little time to allow driving and driven ratchet wheel separate, this moment, driven ratchet wheel was initiatively, its back of tooth produce one to the right axial component and act on initiatively on the ratchet wheel, automatically initiatively ratchet wheel is pushed open, so tooth can not occur beating.

Vehicle in making the process of powered travel, in case of against the wind, overload or climb long slope and when causing obviously slowing down, but then manpower is stepped on and is stepped on the pedal power-assisted, makes people, two kinds of motion stacks of machine; Excessive as motor-driven load, then master clutch skids, and can play certain overload protective function to internal works; Break down or do not have under the situation of fuel oil as driving engine, step on manpower and step on pedal, by chain and flywheel part, the driving trailing wheel travels, this moment, wheel hub in-to-in denture clutch etc. was not all had an effect with the manpower motion, during the motion of old friend's power, and can be as the ordinary bicycle light and flexible of riding.

Below in conjunction with legend, the present invention is described in further detail:

Accompanying drawing one is the overall structure scheme drawing of walk helper of the present invention;

Accompanying drawing two is engine interior structural representations of the present invention;

Accompanying drawing three be the K of accompanying drawing two to view, show the scheme drawing of driving engine profile;

Accompanying drawing four is A-A sections in the accompanying drawing one, shows the scheme drawing of master clutch and starting clutch structure;

Accompanying drawing five is B-B sections in the accompanying drawing one, shows the scheme drawing of one-level deceleration system structure;

Accompanying drawing six is Hub assembly structural representations of the present invention;

Accompanying drawing seven is C-C sections in the accompanying drawing six, the scheme drawing of display machines dynamic clutch structure;

Accompanying drawing eight is brake assembly structural representations behind the present invention;

Accompanying drawing nine is structural representations of rear wheel part of the present invention;

Accompanying drawing ten is embodiment of mini-motorcycle structure of the present invention.

Figure one is the mini-vehicle assistor with rear wheel driven directly general structure schematic diagram that meets theme of the present invention. By figure one as seen, mini-vehicle assistor with rear wheel driven directly system is made up of engine [I], start and deceleration transmission mechanism [II], hub assembly [III] and rear brake component [IV]. Engine [I] and start and deceleration transmission mechanism [II] are located on the left side of driving wheel [V], hub assembly [III] and be sleeved on the center that rear brake component [IV] on the hub assembly is located on driving wheel [V]. With reference to figure two, three, engine of the present invention mainly by cylinder head [1], cylinder gasket [2], cylinder [3], cylinder packing [4], left crank [5], right crank [11], crank-pin [13], connecting rod [14], piston pin [15], piston [16], piston ring [17], left crankcase [8], right crankcase [9], magneto [6], magneto boot [7], rolling bearing [12], outside framework oil seal [10], flute spring valve [20], carburetor [21], air filter [ 22], institute's assembly such as silencer [23]. The combustion chamber of cylinder head [1] is shallow hemispherical, and the end face of piston [16] is sphere, the combustion chamber of this pattern and tilting spark plug [18] phase configuration, and to changing combustion law, reducing sudden and violent shake is very favorable with reducing noise; Cylinder [3] adopts aluminium alloy spongy chromium plating monolithic construction or compound casting structure, and its wearability is good, is easy to heat radiation; Cylinder head [1] and cylinder block [3] surface are provided with the fin of enough area of dissipations, have effectively prevented the overheated of engine; Cylinder [3] is provided with three scavenging air belts, namely increase cross flow scavenging on loop-scavenged basis, this not only so that the waste gas at dead angle place obtains driving away, and can prevent that fresh oil gas from directly overflowing and cause short circuit from exhaust outlet, thereby improved scavenging efficiency, impelled increased power; Magneto [6] is a kind of small volume, but can satisfy the microminiature flywheel magneto of rotary inertia, the function that has simultaneously the high and low pressure power supply, the minimum ignition rotating speed of magneto obviously reduces than prior art, adopt C.D.I capacitor discharge, non-contact electronic ignition mode, not only be easy to pilot engine, and can automatic angling and be not subjected to environmental pollution; Carburetor [21] is selected respectively disc valve and two kinds of structural shapes of plunger valve, and they have all done the matching improvement on existing basis; Newly-designed air filter [22] has good air-filtering effect; The silencer of four cell structures [23], its power attenuation is little, and soundproof effect is good.

With reference to accompanying drawing four, main clutch of the present invention is a kind of by active hub [24], driven drum [25], hoof block assembly [26], shoe pin [27], the full floating automatic centrifugation slide block oil-bath type friction clutch that forms of elastic cylindrical pin [28], hoof piece spring [29]. Initiatively the flange of hub [24] and the groove of hoof block assembly [26] match, the shoe pin [27] made from King radially is fitted on the hoof block assembly [26], the work chute that can be arranged symmetrically along active hub [24] flange centre radially slides, two hoof piece springs [29] match hoof block assembly [26] to the company of extension by 4 elastic cylindrical pins [28]; Main clutch is to rely on the square hole in active hub [24] centre and the square shaft neck on the engine right crank [11] to connect firmly together, after engine start, initiatively hub rotates together with right crank [11], interaction by its work nest and shoe pin [27] drives hoof block assembly [26] rotation, when treating that rotating speed surpasses idling, the centrifugal force that hoof block assembly [26] produces overcomes the elastic force of hoof piece spring [29] and engages with driven drum [25], and rotating speed is higher, and its engaging force is bigger. Compared with prior art, the hoof block assembly [26] of this main clutch with driven drum [25] when engaging, except the pulling force that is subjected to hoof piece spring [29], be not subjected to the constraint of other member, so hoof block assembly [26] can fully be fitted with driven drum [25], its engaging force is bigger, and the torque value that transmits is also big; The shoe pin of radial arrangement seems sturdy solid again, and bigger with the contact area of the work nest of active hub [24], so the pressure that shoe pin [27] bears is little, bearing capacity is strong, its reliability and good endurance; Shoe pin [27] adopts King to make again, initiatively work nest and the hoof of hub [24] Strike note between the working face of piece pin [27] is littler, so mechanicalness noise obviously reduces.

With reference to figure four, starting clutch of the present invention system by starting topping bracket [24], starting sour jujube cover [30], starting very heavy [31], start the unidirectional ratchet wheel pawl type clutch of often opening that very heavy spring [32], top cap [33] and flat gear etc. form. Starting topping bracket [24] is integrated member with the active hub [24] of above-mentioned main clutch, which is provided with two topping bracket holes; Starting very heavy [31] is a kind of and the very heavy similar special purpose parts of bicycle freewheel, and its socket cap is loaded in the topping bracket hole, and all the other positions place working chamber; The back of starting very heavy [31] is equipped with starting very heavy spring [32] and is contained the top cap [33] that starts very heavy spring [32], and a seat hole of starting very heavy spring [32] is located on the above-mentioned main clutch hoof block assembly [26]; The starting sour jujube cover [30] that is sleeved on the above-mentioned engine right crank [11] is the tubular member of a hollow, uniform a plurality of ratchets on the ratchet of its left end, and in the face of the output of above-mentioned engine is seen, the direction of offering of ratchet is counter clockwise direction; For the axial displacement of restriction starting sour jujube cover [30] with prevent from starting very heavy [31] and jump out from the operating position with top cap [33], by firm flat gear (seeing the part 34 among the figure one) on starting topping bracket [24] in to block. Compared with prior art, this starting clutch is made easily, engages reliably during starting, can not skid, and can automatically separate after having started.

With reference to figure five, primary speed-down of the present invention system by sun gear [ 25], formula dual planetary gear deceleration device is all carried in the full floating that forms of internal gear [35], planetary wheel carrier [36], planetary gear [37], planetary gear lining [38], planet wheel spindle [39]. The driven drum [25] of sun gear [25] and above-mentioned main clutch is connected as a single entity, and consists of driven bulging sun gear, and it is sleeved on the adjutage of starting sour jujube cover [30] of above-mentioned starting clutch; Two planetary gears [37] are assemblied on the planetary wheel carrier [36] symmetrically by planetary gear lining [38] and planet wheel spindle [39]; Internal gear [35] is a thin-walled parts, realize the location of floating by three the plug cock screws (seeing the part 40 among the figure three) that are fixed on the engine right crankcase [9], between the adjutage of sun gear [25] and starting sour jujube cover [30], between planetary gear lining [38] and the planet wheel spindle [39], all get big gap movingly between internal gear [35] cylindrical and right crankcase [9] mating holes; Sun gear [25] is all short tooth profile of tooth with internal gear [35], and purpose is in order to increase tip clearance. Above-mentioned a series of floating load balancing measure has improved the bearing capacity of planetary gear device effectively, has improved stationarity and the reliability of running, has reduced noise, has reduced manufacturing cost.

With reference to figure one, the second level of the present invention deceleration system is the large and small spur gear pair of pair of horns displacement, gear wheel [43] is made negative addendum modification, pinion [41] is done normal shift, purpose is with the rich intensity of gear wheel [43], partly be transferred to pinion [41], edurance beding strength and the contact fatigue strength of pinion [41] are improved, to reduce spot corrosion and to prolong Long its service life; Pinion [41] is fixedly connected with the planetary wheel carrier [36] of above-mentioned primary speed-down system on the one hand, and the conical surface connects firmly again and between the adjutage of the starting sour jujube cover (30) of above-mentioned starting clutch simultaneously, adds round nut [42] and pieces together tight; Gear wheel [43] is discoid part, and Pan Kou arranges that towards the wheel hub direction purpose is in order to allow hub assembly [III] partly insert into the inner.

With reference to figure one, gear box cover assembly of the present invention is to be made up of institutes such as gear box cover [44], hub seat [45] and outside framework oil seals [46]. Be riveted on hub seat [45] on the gear box cover [44] and be, wearability higher with intensity preferably material be made, its effect is that reduction box and hub assembly are combined, the axial dimension of wheel hub is shortened, again as main supporting, engine and the formed bracketed part of reduction box are steadily held up simultaneously; Be balance reduction box inner and outer air pressure, prevent that machine oil from exosmosing, hub seat [45] is provided with respiratory tract.

Accompanying drawing six is structural representations of hub assembly of the present invention. Compared with prior art, this hub assembly does not have left and right floral disc, and radially littler with axial dimension, internal structure is simple, and rear axle is sturdy solid and do not bear moment of torsion. This hub assembly mainly is by institute's assemblies such as hub unit, left gear gear assembly, power clutch, jaw clutch, spline pair, rear axle assemblies, flywheel part and starting lever assemblies.

Hub unit comprises wheel hub [80] and is connected in one with its stationary fit The internal spline [81] that rises; Wheel hub [80] is a tubular member, and its left end is take rolling bearing [54] as supporting, right-hand member take with the wheel hub end housing [78] that is threaded and the rolling bearing [65] in its endoporus as supporting; On the flange of wheel hub end housing [78], the flywheel part [77] of ordinary bicycle is housed; On the cylindrical in wheel hub left side, be provided with one section with above-mentioned gear box cover assembly in hub seat (seeing the part 45 among the figure one) hole carry out smooth cylinder movingly, be shaped with the external splines that one section connection trailing wheel is used on the cylindrical on right side.

Left side retaining gear [53] is divided into big gear wheel and a left side big retaining two parts, and it is that supporting is assemblied on the rear axle [76] with antifriction-bearing box [52] with left side retaining lining [55].

Accompanying drawing seven is C-C sections in the accompanying drawing six, the scheme drawing of display machines dynamic clutch structure.This power clutch is a unidirectional normally closed click formula power-transfer clutch, and it is by the ratchet that is opened on wheel hub [80] inwall, and motor-driven very heavy [57], motor-driven very heavy spring [56] reach the topping bracket that is connected as a single entity with driven ratchet wheel [58] and form; Ratchet to offer direction opposite with the rotating direction of wheel hub [80] when advancing, the square hole of topping bracket by its center connects firmly with the square shaft neck of retaining gear [53] end, a left side.

Denture clutch is a pair of tiltedly power-transfer clutch of the trapezoidal tooth cog shape of the back of the body of unidirectional right angle that has, it by active ratchet wheel [61], driven ratchet wheel [58], be contained in the needle roller [64] in ratchet wheel [61] annular groove initiatively and the flat retaining [62] that is fastened on the ratchet wheel [61] is initiatively formed.Initiatively ratchet wheel [61] is sleeved on the rear axle [76], and male splines on its cylindrical and the above-mentioned interior external key [81] that is fitted in wheel hub [80] endoporus are a pair of spline pairs; Driven ratchet wheel [58] is positioned at the initiatively left side of ratchet wheel [61], and initiatively ratchet wheel [61] both can rotate around rear axle [76] with wheel hub [80] by spline pair, can be in axial sliding along the needle roller guide groove on the rear axle [76] with needle roller [64] again.Under external force, starting push rod [70] promotes needle roller [64] and drives active ratchet wheel [61] to slide left, can make driving and driven ratchet wheel [61], [58] be in engagement state; Otherwise when external force was cancelled, then initiatively ratchet wheel [61] automatically reset under pull back spring [49] and return ejector pin [60] elastic force effect, and driving and driven ratchet wheel [61], [58] are in released state at this moment.

With reference to accompanying drawing eight, back of the present invention brake component is the special-purpose expanding brake of a width of cloth, is by the frame component of stopping [87], brake shoe brake cheek [88] and [91], brake axle [90], brake shoe expander [93], folder spring [92], brake control lever institute's assemblies such as [94].Brake wheel is located on the trailing wheel, the frame component [87] of stopping is sleeved on the hub seat [45] of above-mentioned gear box cover assembly, and tighten together with gear box cover [44], force brake shoe brake cheek [88], [91] to be opened by brake shoe expander [93], directly act on brake wheel on the trailing wheel and produce braking effect.

With reference to accompanying drawing nine, trailing wheel of the present invention, the steel ring assembly is a soldering member of being made up of wheel rim [99], tabular width of cloth bar [98] and wheel hub [100] thereafter.Tabular width of cloth bar [98] makes the intensity of trailing wheel and rigidity increase, and wheel hub [100] is offset to the right, forms the dish shape member of depression, its objective is in order to reduce the offset of walk helper bracketed part, improves its stationarity; Drum and external drum two parts in wheel hub [100] is divided into, the male splines on female splines on the interior drum and the above-mentioned wheel hub [80] is the spline pair that pair of matched is closed, external drum is fastened the brake wheel of stating the back brake component.Compared with prior art, the intensity height of this rear wheel part, good rigidly, folding dress conveniently can improve the stationarity of vehicle.

Accompanying drawing ten is embodiment of mini-motorcycle structure of the present invention, this mini-motorcycle is a kind of novel walking-replacing tool between bicycle and motor bike, is by light deflector parts [101], left side grip [102], a left side is seat [103], twist grip throttle control [104], right seat [105], handlebar parts [106], front brake cable wire parts [107] back brake cable wire parts [108], throttle control cable parts [109], clutch cable parts [110], preceding lamp part [111], dynamic loud-speaker [112], frame part [113], front fork parts [114], front fender apron parts [115], forward wheel components [116], preceding spindle unit [117], chain cap assembly [118], axis parts [119], pedal parts [120], medium-height trestle parts [121], flexible attachment components [122], chain stay parts [123], chain part [124], walk helper [125], rear wheel part [126], transfer chain apparatus [127], back mud plate member [128], rear shock absorber parts [129], taillight parts [130], clothes hanger parts [131], left side backplate [132], electronic ignition switch and circuit hot [133], right backplate [134], saddle parts [135], handle parts [136], fuel oil strainer [137], fuel tank parts [138], wire component [139] is formed.

Compared with prior art, this power assist vehicle has following characteristics:

1, engine has good low-speed dynamic property, so no matter vehicle is when running at a low speed or doing middle and high speed and travelling, start function all to be in preferably duty in full speed range.

2, magneto low speed ignition rotating speed is low, adopts the non-contact electronic ignition mode in addition, so the starting performance of engine is good, and the energy automatic angling, not contaminated.

3, the walk helper internal structure all is optimized design, has good reliability and durability.

4, the offset of walk helper bracketed part is littler, has not only improved the stationarity of vehicle, and makes the more aobvious compactness of structure, has increased outward appearance U.S..

5, the vehicle rear wheel steel ring adopts special tabular width of cloth bar welded structure, and not only good rigidly, intensity are big, and dismounting is very convenient.

6, vehicle frame, chain stay are special purpose parts, meet the instructions for use of power assist vehicle.

7, front and rear wheel is equipped with shock absorber, again walk helper and vehicle frame, flat Adopt flexible coupling method between the fork, so the vibrations of vehicle are little, ride comfort good.

8, the illumination of vehicle, signal and PA-system are complete, and forward and backward braking all is the lock that rises, and braking is reliable, meet the regulation of traffic safety.

9, adopt lift saddle parts, in the time of satisfying motor-driven, foot-operated different operating mode and the people of various statures adjust the needs of saddle height.

10, vehicle modeling novelty.

11, enter into the fuel oil of carburetor, through three-stage filtration, reduced oil path failure, the reliability when having improved carburetor work.

12, noise is lower.

Claims (15)

1, a kind of mini-vehicle assistor with rear wheel driven directly is made up of driving engine, start and deceleration transmission device, Hub assembly and back brake component.It is characterized in that: driving engine is horizontal arrangement, and its right crankcase and drop-gear box are connected as a single entity; By master clutch, starting clutch, the start and deceleration transmission device that the I and II deceleration system is formed is concentrated and is assemblied in the drop-gear box; Hub assembly is realized the combination with the drop-gear box part by being riveted on the hub seat on the gear box cover; Back brake component is sleeved on the hub seat; The trailing wheel of the tabular Spoke structure of depressed is directly installed on the wheel hub by spline pair.

2, walk helper according to claim 1 is characterized in that: driving engine is single cylinder, horizontal, natural air cooled, mixed lubrication, the scavenging of crankcase ternary, the special-purpose spark ignition engine of two strokes; Cylinder is aluminum alloy spongy chromium plating one-piece construction or bimetal casting structure; Combustion chamber is shallow dome-type, and piston-top surface is a sphere, matches with tilting light-up plug; Magneto generator adopts capacitive strike non-contact electronic ignition mode, and magnet steel is a strong magnetic material, and rotor portion adds the cover cap sealing.

3, walk helper according to claim 1 is characterized in that: master clutch is the automatic centrifugal slider oil-bath type of a full floating friction clutch, and it is made up of active hub, hoof block assembly, shoe pin, hoof piece spring, elastic cylindrical pin and driven drum.Initiatively the flange of hub periphery matches with the groove of hoof block assembly, shoe pin on the flange two are the guide groove of symmetric arrangement and radially are fitted in the hoof block assembly matches, shoe pin is made by the plastics king, two hoof piece springs by four elastic cylindrical pins with the two hoof block assemblies company of extension in opposite directions; The dough sheet material that thermocompression bonded is attached on the hoof block assembly is a composite sulfuration rubber; Master clutch is to be linked together by the square shaft neck close fit on the square hole at active hub center and the right crank mouth of above-mentioned driving engine.

4, walk helper according to claim 1 is characterized in that: starting clutch is a unidirectional click formula power-transfer clutch of often opening, and it is very heavy by starting topping bracket, starting, start institutes such as very heavy spring, top cap, starting sour jujube cover and flat shelves forms.The active hub of starting topping bracket and above-mentioned master clutch is connected as a single entity, and which is provided with two topping bracket holes; Starting very heavy is a kind of and the very heavy similar special purpose parts of bicycle, and its socket cap is packed in the topping bracket hole, and the working end places epitrochoidal chamber; Very heavy back is equipped with the very heavy spring of starting and is contained the top cap of very heavy spring, starts on the hoof block assembly that very heavy spring abutment hole is located at above-mentioned master clutch; The starting sour jujube cover that is sleeved on the right crank of above-mentioned driving engine is the tubular member of a hollow, and uniform a plurality of ratchets on the ratchet of its left end are in the face of the mouth of above-mentioned driving engine sees that the direction of offering of ratchet is an anticlockwise direction; Above-mentioned member all is contained in the centre of master clutch, is blocked by the flat shelves that are fastened on the topping bracket outward.

5, walk helper according to claim 1 is characterized in that: the one-level deceleration system is that formula dual planetary gear speed reduction gearing is all carried in full floating, and it is made up of sun wheel, planet wheel spindle, planetary wheel carrier and inner gear.The driven drum of sun wheel and above-mentioned master clutch is connected as a single entity, and constitutes driven bulging sun wheel, and is sleeved on the cylindrical of above-mentioned starting sour jujube cover; Two satellite gears are assemblied on the planetary wheel carrier by planet wheel spindle symmetrically; Thin-walled parts of internal tooth train is realized the location of floating by three plug cock screws on the above-mentioned engine right crankcase; Sun wheel and inner gear are all short tooth profile of tooth, between sun wheel endoporus and the starting sour jujube cover cylindrical, between satellite gear endoporus and the planet wheel spindle, all get the running-fit in big gap between inner gear cylindrical and the tank wall.

6, walk helper according to claim 1 is characterized in that: second stage deceleration system is the large and small spur gear pair of a pair of angular deflection, canine tooth crop rotation negative addendum modification, and miniature gears is done normal shift; The planetary wheel carrier of miniature gears and above-mentioned one-level deceleration system is connected, and the male cone (strobilus masculinus) of the cover of the starting sour jujube by its internal taper hole and above-mentioned starting clutch right-hand member is connected simultaneously, adds circular nut and pieces together tightly, and is sleeved on the right crank of above-mentioned driving engine.

7, walk helper according to claim 1 is characterized in that: the hub seat of a riveted joint is arranged on the gear box cover assembly, which is provided with hub seat hole, oil sealing hole and respiratory tract.

8, walk helper according to claim 1, it is characterized in that: Hub assembly is one does not have left and right floral disc, radially all less with axial dimension special-purpose member, and it comprises hub unit, a left side big retaining assembly, power clutch, denture clutch, spline pair, rear axle assemblies, wheel hub end housing, flywheel part, axle head joint and starting lever assembly etc.

9, according to claim 1,8 described walk helpers, it is characterized in that: wheel hub is a tubular member, and its inner left wall is provided with the mating holes of bearing, and the outside in left side is one section smooth cylinder that matches with the hub seat hole of above-mentioned gear box cover assembly; Wheel hub right side inwall is shaped on one section and connects right-hand thread that wheel hub end housing uses and the hole of matching with female splines, is shaped on one section on the cylindrical of right side and connects the invoice serration that trailing wheel is used.

10, according to claim 1,8 described walk helpers, it is characterized in that: the canine tooth train integrated support structure of big retaining in the left side of Hub assembly and above-mentioned second stage deceleration system, it is by being contained in antifriction-bearing box and the lining in the endoporus, be assembled together with rear axle, the antifriction-bearing box on its cylindrical is as the left side supporting of above-mentioned wheel hub.

11, according to claim 1,8,9 described walk helpers, it is characterized in that: power clutch is a unidirectional normally closed click formula power-transfer clutch, and it is made up of motor-driven ratchet, very heavy, very heavy spring, topping bracket.Motor-driven ratchet directly is opened on the relevant position of above-mentioned wheel hub inwall, and the rotating direction during the offering direction and advance with wheel hub of hook tooth is opposite; Four of being distributed on the topping bracket are very heavy, lived by the very heavy spring buckle of a ring-type, and the square shaft neck that topping bracket is blocked greatly by the square hole and the above-mentioned left side at its center is connected.

12, according to claim 1,8,10 described walk helpers, it is characterized in that: denture clutch is a pair of tiltedly free-wheel clutch of the trapezoidal tooth cog shape of the back of the body of right angle that has, it is by the active ratchet wheel, driven ratchet wheel and be fastened on flat retaining on the ratchet wheel right side initiatively etc. and form.Initiatively ratchet wheel is sleeved on the rear axle, and its cylindrical is provided with male splines, forms a pair of spline pair with the female splines that is fitted in the above-mentioned wheelboss inner hole; Driven ratchet wheel is positioned at the initiatively left side of ratchet wheel, and the topping bracket of it and above-mentioned power clutch is an integral member.

13, according to claim 1,8 described walk helpers, it is characterized in that: the right-hand member of wheel hub is equipped with a wheel hub end housing that is connected by right-hand thread, the flange of wheel hub end housing is used to install the ordinary bicycle flywheel part, the endoporus of flange is used to install antifriction-bearing box and outside framework oil seal, and wheel hub end housing is to realize feeling relieved by the outer stopper on the inner stopper in left side and the above-mentioned female splines that is fitted in the wheel hub.

14, walk helper according to claim 1, it is characterized in that: the back brake component is a secondary special-purpose expanding brake, system is by brake wheel, the frame component and be assemblied in institutes such as brake axle on the frame component of stopping, brake shoe brake cheek, brake shoe expander, brake control lever and form stopped, brake wheel is arranged on the trailing wheel, the frame component of stopping is sleeved on the hub seat of above-mentioned gear box cover assembly, and tighten together with gear box cover, force brake shoe brake cheek coiling moving axis to open by brake shoe expander, directly act on brake wheel on the trailing wheel and produce braking effect.

15, according to claim 1,14 described walk helpers, it is characterized in that: the steel rim of rear wheel assembly is a dish shape member of depression to the right that is formed by wheel rim, tabular width of cloth bar and wheel hub assembly welding; Drum and external drum in wheel hub is divided into, interior drum is shaped on the female splines that matches with above-mentioned wheel hub, and external drum is the brake wheel of above-mentioned back brake assembly.

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