CN2918895Y - Diameter-variable driving wheel and full-automatic micro-shift transmission - Google Patents

Abstract

The utility model relates to a changing diameter transmission wheel and a fully automatic tiny shift transmission. The device comprises a changing diameter transmission wheel and a middle transmission belt and a related shifting device. The wheel surface traction belt is rolled to form the changing diameter transmission wheel working surface, the non-transmission part is rolled in the wheel center; the wheel surface traction belt and the transmission belt are formed into an engaged transmission pair. The transmission wheel realizes the torque transfer by a traction bracket sliding in the radial chute of the cone transmission tray, the diameter size of the transmission wheel pitch circlet is determined by the place of the traction bracket; the changing diameter wheel realizes the transmission wheel pitch circle variation by the mutually matching of a wheel expanding device and a wheel shrink device, the transmission device uses the changeability of the transmission wheel pitch circle radius to achieve the changing speed transmission. The device can be used in the working machinery with frequently changed transmission ration.

Description

Diameter-variable driving wheel and full-automatic micro-shift transmission

Technical field

The present invention relates to a kind of can infinite variable speed mechanical transmission mechanism, particularly a kind ofly can steadily change the transmission device of drive wheel radius and micro-shift transmission automatically.

Background technique

Transmission device occupies an important position in mechanical system, its good and bad overall performance that directly influences system; When carry out with prime mover speed governing uneconomical or can not the time, need utilize speed changer to satisfy the demand of the frequent speed change of working machine.In industries such as weaving, food, papermaking,, generally adopt mechanical stepless transmission to carry out speed regulation for adapting to the continuous variation of the changeable or fast change of process parameter.

Though at present mechanical continuously-variable transmission structure difference nearly all will be come transmission by friction (traction) power, even by the gear chain type stepless variable speed unit of part engaging force transmission, also existence slip can not be transmitted big power in its transmission process.

Speed changer is divided into two kinds of manpower gearshift and power gear shiftings according to the difference of maneuverability pattern.The manpower gearshift is simple in structure, and reliable operation is easily manufactured, in light weight, the efficient height.But labor intensity is big; During gearshift the power cut time longer, influence operating efficiency.Be applied to automobile and can be reduced in passing ability on the abominable road surface.The speed changer of power gear shifting is used shift clutch and respectively the gear of different gears is connected, with this conversion gear.Shift clutch adopts hydraulic pressure installation to handle.Pressure oil liquid drives oil pump by prime mover and supplies with.Its complex structure is made difficulty, the required precision height.Weight and volume is big; Shift clutch has frictional loss, and transmission efficiency is low.

The stepless speed variator CVT transmission efficiency height of using on the automobile, the transmission quality better.But problem such as rub that the problem that exists is the restriction in driving belt intensity, life-span and the cunning between driving belt and the belt wheel.These defective effects applying of CVT.

Summary of the invention

The objective of the invention is to overcome the defective of prior art.A kind of automatic micro-shift transmission of mechanical type with high transmission efficiency is provided, and its reliable operation operates steadily, and can transmit high-powerly, simple in structure, in light weight, and cost is low.

Diameter-variable driving wheel of the present invention comprises transmission shaft and two awl dishes mounted thereto in opposite directions and can move to axial, and is provided with wheel table traction belt between two described awl dishes, and described table traction belt one end of taking turns links to each other with hitch frame, and the other end links to each other with backguy; The described backguy the other end be installed in transmission shaft in the dress torsion spring reel or backguy circle link to each other; Described hitch frame is slidably mounted in the radial groove of described two awl dishes, the described conical surface of taking turns table both sides of traction belt and the described awl dish formation kinematic pair that matches.

Diameter-variable driving wheel of the present invention, described awl disc radial chute one side has the transition inclined-plane; The conical surface center of described awl dish is provided with the appearance trough of belt; Described radial groove is positioned on the conical surface of described awl dish and with described appearance trough of belt and communicates; Described to take turns the table traction belt be duplex chain, and the rolling of the conical surface of the conical surface roller of its both sides and the conical surface of described awl dish cooperates, and described backguy is two.

Diameter-variable driving wheel of the present invention, described awl dish is made up of base cone face and the crescent moon addendum cone face and the balancing disk that are installed in respectively in it on outside; On the described crescent moon addendum cone face transition inclined-plane is arranged; Described chute is positioned on the base cone face; Described to take turns the table traction belt be duplex chain, and it is formed by wide chain link, wide chain transition segment, narrow chain transition segment, narrow chain link serial connection; The conical surface roller of described wide chain link both sides rolls with the conical surface of described base cone face and cooperates, and the conical surface roller of described narrow chain link both sides rolls with the conical surface of described crescent moon addendum cone face and cooperates; Described backguy is a flexible pull wire; Described hitch frame bi-side and front-end face all are equipped with rolling element; Have chain channel on the described hitch frame, described narrow chain link is come in and gone out thus.

Automatic micro-shift transmission of the present invention comprises case of transmission, input shaft, output shaft: described diameter-variable driving wheel also is housed in the case of transmission; The transmission shaft of described diameter-variable driving wheel is as output shaft, and the opposite side of input shaft is stretched out from the described housing; The awl dish that described diameter-variable driving wheel is fixed on outputting axial power output terminal one side is the fixed cone dish, and another awl dish is mobile awl dish; Described input shaft is equipped with the sizing wheel, and affiliated sizing wheel and wheel table traction belt link together by the driving belt that is engaged with; Be provided with the Idle wheel of driving belt between described sizing wheel and diameter-variable driving wheel, described Idle wheel is fixed on the housing by pivoted frame, and the control blocking means of the described displacement disc axial motion of control also is housed in described housing.

Automatic micro-shift transmission of the present invention, its sizing wheel and or Idle wheel constitute by wheel disc and gear pin; Described gear pin is evenly arranged in the hole on the wheel disc, and the axis spacing of adjacent bearing pin equates with the pitch of described driving belt chain link.

Automatic micro-shift transmission of the present invention, described control blocking means comprise roller disk, sawtooth thread form pipe, the spacing tube of the gear shift device, advancing means, gear shift device and displacement disc one side that are installed on the housing; The turning rolls that a pair of radial symmetric is arranged is housed on the roller disk of described displacement disc one side; Described sawtooth thread form pipe is contained in the outside of roller disk; Described sawtooth thread form pipe and displacement disc are fixed together; Described gear shift device comprises that the gear shift frame wherein movably advances to keep off chain wheel with being installed in; Described gear shift frame two threaded stems interior with being installed in housing match; Described gear shift frame by stepping motor by pair be with synchronously, band, threaded stem, deputy thread bar drive and are subjected to displacement synchronously; Roller on the described turning rolls is installed in end face one side of described gear shift frame; Described spacing tube is fixed on the other end of output shaft, and tooth of sawtooth thread form piece is meshed with the tooth of described sawtooth thread form pipe on it; Described advancing means comprises the hoof piece that is installed in a pair of synchronization motion in the hoof piece box of gear shift frame both sides, and it radially is arranged in the described both sides of advancing to keep off chain wheel, controls described the flexible of chain wheel that advance to keep off; Described gear shift device comprises three-position electromagnetic iron, control pull rod, transfer backguy and main drawing line; The control pull rod that is installed on the described housing matches with disc cam or push rod push-plate on the described spacing tube, and the action of controlling push-jump hoof piece or backing down the sawtooth block teeth is regulated displacement disc and moved forward and backward.

Automatic micro-shift transmission of the present invention, described spacing tube cylindrical shell one end has 4 chutes, and 4 sawtooth thread forms are packaged in the square through hole of chute and annular end cap formation; Flexible strip acts on the groove of each sawtooth thread form piece; The spacing drum outer wall has the push rod of 4 pushing tow sawtooth thread form pieces, and the head of push rod acts on the groove of sawtooth thread form piece; The spacing tube the other end has a cam, and the axle head that is positioned at cam one side has screw thread, and the push rod push-plate passes through the screw spinning at its middle part on screw thread; Between cam and the push rod push-plate torsion spring is housed, collude respectively on spacing tube cylindrical shell and push rod push-plate at its two; The push rod push-plate is equipped with catch, back-up ring outward.

Automatic micro-shift transmission of the present invention, the revolution bodily form teeth that described sawtooth thread form tube-surface has multiple tracks to be parallel to each other, its cross section is a sawtooth.

Automatic micro-shift transmission of the present invention is characterized in that: describedly advancing to keep off to have on the chain wheel spiral of two sections symmetrical distributions tooth, is two sections planes between two pairs of spiral teeth.

Automatic transmission provided by the invention has following characteristics and advantage:

Compare with existing automatic transmission, automatic transmission provided by the present invention has the gear of multistage close branch.The category that belongs to step change transmission.Its gear is many, gear ratio densely distributed and even, therefore also can be described as micro-shift transmission or crammed speed changer.

The kind of drive of this automatic transmission belongs to engagement driving, does not have the problem of drive belt slip, can transmit big power.

This automatic transmission velocity ratio depends on the radial position of hitch frame on the diameter-changing wheel, and in the process of transposing gear, hitch frame is level and smooth moving on diameter-changing wheel wheel body radial line direction.Therefore have infinite variable speed characteristics during the conversion gear.

This automatic transmission belongs to power gear shifting, and its shifting power is directly obtained from output shaft by mechanical device, does not need extraneous input power.Save power supply devices such as the used oil pump of traditional automatic transmission, power supply, reduced corresponding kinetic equation loss.

Therefore, the invention belongs to a plurality of close minute gear stablized, can infinite variable speed power gear shifting type automatic mechanical transmission.

Characteristics of the present invention are: diameter-variable driving wheel participates in forming its length of part of taking turns the watch chain circle and can change.Temporarily do not participate in the part of transmission then around being stored in core wheel.Be positioned at hitch frame one side, the place that wheel table traction belt is come in and gone out is called the reducing opening.As long as the reducing opening go to the non-cornerite district of driving belt just can the regulating wheel footpath.So the diameter-changing wheel revolution is moving once enclosing the chance of once shifting gears.

Automatic transmission provided by the present invention is according to given gearshift Automatic Program conversion velocity ratio.The gearshift program is provided by microcomputer.For different work mechanisms, computer wants the reference signal of analysing and processing to be not quite similar.Such as for automotive transmission, the topmost reference signal of its gearshift is the combination of engine load and vehicle speed signal; And for a stepless speed variator that is used for Chemical Manufacture, the reference signal of its gearshift may be the combination of other signals such as temperature, humidity in the production process.

Description of drawings

Fig. 1 (a) is the assembling stereogram of gearbox, (b) is the speed changer close-up view;

Fig. 2 (a) is the view of part 37 among Fig. 1 (a), (b) is the diameter-changing wheel broken away view, (c) is the sectional view of axle head 32-1;

Fig. 3 (a) is the structure and the broken away view of driving belt 33, and (b) figure is the broken away view of wheel table traction belt;

Fig. 4 (a) is the speed changer exploded view, (b) is the another kind of diameter drive wheel figure that decides;

Fig. 5 (a)-(c) is the view of driven shaft parts and control pull rod;

Fig. 6 (a)-(d) is spacing cartridge unit and the subdivision graph that moves the awl disk component

Fig. 7 (a) and (b) are location diagrams of transmission part.

Fig. 8 is the planimetric map of diameter-changing wheel wheel footpath shown in Figure 7 when two ultimate states;

Fig. 9 (a) is the block selecting device that is contained on the mission case, and (b) figure is the broken away view of gear shift frame 35 and annex thereof;

Figure 10 (a)-(d) is that automatic transmission is utilized the self-shifting schematic diagram of main shaft power;

Figure 11 (a)-(e) advances to keep off the fundamental diagram of chain wheel 36;

Figure 12 (a) and (b) are gear shift schematic diagrams; (c) figure be into keep off chain wheel partly cut open figure;

Figure 13 (a)-(c) is the schematic diagram that diameter-variable driving wheel changes the wheel footpath;

Shown in Figure 14 (a)-(c) is the planimetric map and the broken away view of a kind of compound conical surface dish diameter-variable driving wheel and parts;

Figure 15 (a)-(c) figure is the structural drawing of compound conical surface dish diameter-variable driving wheel.

Embodiment

Describe the characteristics of diameter-variable driving wheel, reducing transmission device and full-automatic micro-shift transmission in detail with embodiment below in conjunction with accompanying drawing.

Fig. 1 (a) is the assembling stereogram of automatic transmission.Output shaft 32 is contained on the lower shell body 42; Fixed cone dish 31 is loaded on output shaft 32 1 ends, and spacing tube 37 is installed in output shaft 32 the other ends, plays fixing mobile awl and coils 34 axial positions.There is tapped hole at pole place, gear shift frame 35 both sides, and threaded stem 38 screws in wherein; Stepping motor 40 when being with 39 to drive a pair of threaded stem 38 and rotate synchronously, can drive gear shift frame 35 and dress thereon advance to keep off chain wheel 36 translations.The power that speed changer transmits is by input shaft 41 inputs, through driving belt 33, by the end output of output shaft 32 by fixed cone dish 31.

(b) be the speed changer close-up view, upper shell 43, lower shell body 42 and housing protecgulum 44 have constituted gearbox case, and input shaft 41 and output shaft 32 stretch out from housing.

Fig. 2 (a) is the spacing tube 37 among Fig. 1 (a), and the push rod push-plate 45 of band breach 45-1 is equipped with in its rear end.Front end is adorned 4 sawtooth block teeth 47, is pressed on the spacing tube cylindrical shell with flexible strip 48.Push rod 46 is contained in drum surface.

(b) be diameter-changing wheel broken away view on the output shaft: roller chain 52 is reeled and is formed wheel table traction belts; The one head is connected on the hitch frame 51, and link on the reel 59 by two backguys 50 other end.When increasing two awl dishes 31 and 34 axial spacings, chain 52 is drawn towards core wheel under the coiling effect of reel 59, is stored in after the winding to hold in the band groove 58.When dish 31 and 34 axial spacings when reducing, a plurality of conical surface rollers 49 of chain both sides with the effect of the awl dish 31 and 34 conical surfaces under.Driven wheel table traction belt 52 extends out along disc radial, and this has just reached increase wheel table girth, enlarges the purpose in wheel footpath.Awl dish upper edge cone element has the hitch frame chute 51-1 that hitch frame 51 is installed, and another effect of this groove is the passage that forms wheel table traction belt 52 discrepancy core wheels; The conical surface roller 49 of chain both sides is come in and gone out by inclined-plane 31-1.Awl coils the axle 34-1 of 34 ends and the hole 54-1 interference fit on the sawtooth thread form pipe 54, and roller disk 57 is installed in mobile awl dish 34 and sawtooth thread form pipe 54 centres.Two turning rollss 56 that roller 55 is installed are housed on the roller disk 57.Be processed with spline 32-3 on the axle 32, back-up ring 32-2 and catch 53 are equipped with in the rear end, and terminal 32-1 place part is brushed insulated paint.

(c) figure is the sectional view at (b) Figure 32-1 place, the part segmental arc that thick black line represents to brush insulated paint.

Driving belt 33 among Fig. 3 (a) and roller chain roller 52 or take turns 60 circle-arc tooth and can constitute engagement pair.Driving belt 33 is dressed up by needle bearing 63 and bearing pin 63-1 by carrier bar 62.Driving belt is made up of two rows chain arranged side by side, guide rod 61 interconnect function of having held concurrently, a 61-1 at its two ends and the hole 62-1 interference fit on the carrier bar.

(b) figure is the broken away view of wheel table traction belt, and wheel table traction belt converts with common roller sleeve chain, and one connects hitch frame 51, and the other end links to each other with reel 59 by backguy joint 50-1, backguy 50.Dress torsion reed 64 in the reel 59.Split out roller chain roller 52 among the figure, sleeve 65 and conical surface roller 49.

Fig. 4 (a) is the speed changer exploded view, and this is the situation that lower shell body is taken apart: fixed cone dish 31 usefulness bearing 32-4 are installed on the housing protecgulum 44.Diameter-changing wheel wheel footpath is tuned to minimum, and a wheel table traction belt part is around being stored in core wheel.Hitch frame 51 moves to the position near core wheel.The axle head of guide rod 61 contacts with the conical surface of awl dish 34.Driving wheel 60 drives diameter-changing wheel by driving belt 33.The axle 66-1 of Idle wheel 66 be contained in a pair of can be on the pivoted frame 67 that turret shaft 67-1 rotates.Turret shaft 67-1 can be loaded among the 44-1 of hole.

(b) figure is another kind of decide diameter drive wheel, driving wheel 60 and Idle wheel 66 among alternative (a) figure.Evenly arrange pin shaft hole 68-2 on this wheel disc of taking turns 68, the gear pin 68-3 that is adorned in the hole is equivalent to the knuckle-tooth of driving wheel 60 and Idle wheel 66.

Fig. 5 (a) is the output shaft subdivision graph, and this is a diameter-changing wheel wheel footpath situation hour, and roller disk 57 and sawtooth thread form pipe 54 move to output shaft 32 ends with mobile awl dish 34, and mobile awl dish 34 reaches maximum with the spacing that withstands on the fixed cone dish 31 at axle collar 32-4 place.Hitch frame 51 also drops to the lowest part of hitch frame chute 51-1, and its inclined-plane, both sides 51-2 and groove 51-1 form sliding pair.The parts that are not broken away among the figure are flexible strip 48 and torsion spring 69.

(b) figure is mounted in the output shaft on the lower shell body 42 and the view of annex.This is that diameter-changing wheel wheel footpath is expanded to maximum situation, and roller disk 57 and sawtooth thread form pipe 54 move axially to from awl with mobile awl dish 34 and coil 31 nearest positions.Can see among the figure and adorn push rod push-plate 45, the disc cam 37-1 that has breach 45-1 on the spacing tube 37.Control pull rod 71 is installed on the housing, and it is fixing with positioning plate 72, and control pull rod 71 is connected on the three-position electromagnetic iron 70 by connecting rod 70-1.Output shaft 32 ends are adorned a brush 73, are two contacts of switch on it, when contacting with the insulation segmental arc of shaft end, will cut off the circuit of three-position electromagnetic iron 70.

(c) figure is the enlarged view of control pull rod 71 among (b) figure, the 74th, and the pull wire head of soft drawn wire, 74-1 is the backguy cover.Push rod 75 can be by connecting rod 75-1 pulling pull wire head 74.The 76th, the protruding tooth of stop, its with figure (b) in breach 45-1 on push rod push-plate 45 do the time spent and can rotate with spacing tube 37 by prevention dish 45.

Fig. 6 (a) is the subdivision graph of spacing tube, and barrel front end has four chute 37-2, and itself and annular end cap 37-3 can form four square through holes, and sawtooth block teeth 47 wherein are housed.Four block teeth are embraced by flexible strip 48.The corresponding push rod 46 of each block teeth.47-0 is one and half block teeth that cut open.Processed a disc cam 37-1 on the spacing tube.Push rod push-plate 45 is contained on the screw thread of barrel tip, and the centre is a torsion spring 69.

(b) figure is the pattern that the spacing tube shown in (a) figure is oppositely placed, can see end thread 37-4, jagged 45-1, tapped hole 45-2 on the push rod push- plate 45,69 1 of torsion springs catch on push rod push-plate 45, collude on cylindrical shell the other end, when push-plate 45 overcomes the torsion of spring 69, on screw thread 37-4, during turn, can promote push rod head 46-1.

(c) the figure subdivision awl dish 34, roller disk 57 and turning rolls 56, turning rolls 56 usefulness bolt 56-1 are contained on the roller disk 57.The 54th, sawtooth thread form pipe, the 58th, the appearance band groove on the awl dish 34.

(d) be the enlarged view that dissects of the middle sawtooth block teeth 47 of figure (a), groove 47-1 and push rod head interact; Groove 47-3 is in order to embed flexible strip.47-2 is a circular arc sawtooth tooth.

Fig. 7 (a) and (b) figure is the transmission part location diagram.(a) be the minimum situation in diameter-changing wheel wheel footpath.Input shaft 41, turret shaft 67-1 are installed on the housing protecgulum 44, and driving wheel 60, Idle wheel 66 act on the driving belt 33.Tension wheel shaft 66-1 is contained on the pivoted frame 67.Situation when (b) being diameter-changing wheel wheel footpath maximum, Idle wheel 66 rotates also near driving wheel 60 with pivoted frame 67.

Fig. 8 (a) and (b) are diameter-changing wheel wheel footpath shown in Figure 7 planimetric maps when two ultimate states, have shown the position relation of hitch frame 51, driving wheel 60 and Idle wheel 66 among the figure.Arrow has been indicated the characteristics of this variable speed drive folk prescription to transmission.

Fig. 9 (a) is the control blocking means that is contained on the speed changer lower shell body 42.There is tapped hole at the pole place of gear shift frame 35 both sides, it cooperates with threaded stem 38 and deputy thread bar 38-2, threaded stem 38 usefulness thrust-bearing 38-1 are installed on the housing 42, and that installs in the macropore of gear shift frame 35 advances to keep off chain wheel 36, can translation in macropore under the effect of a pair of push-jump hoof piece 78.Stepping motor 40 is housed on the housing, and it is by short band 39-1 synchronously and be with 39 drive two bars 38 and 38-2 to rotate synchronously synchronously, drives gear shift frame 35 and advance to keep off chain wheel 36 with this to move horizontally.Control pull rod 71 is moving by a three-position electromagnetic sheet iron strip, is connected with soft drawn spool 77 between itself and the gear shift frame 35.

(b) figure is the broken away view of gear shift frame 35 and annex thereof, the 36th, advance to keep off chain wheel, and its front end is symmetrically distributed with two spiral teeth, and 36-1,36-2 are the screws of Returnning spring and support spring.There is tapped hole pole end, gear shift frame 35 both sides.Two hoof piece box 35-1 are fixed by bolts on 35 liang of poles of gear shift frame.Backguy seat 35-2 and hoof piece 78 are installed among the hoof piece box 35-1.Both sides hoof piece interrelates by transfer backguy 77-1, can synchronization motion.Hoof piece 78 can rotate around its rotating shaft 78-1.

Figure 10 is that automatic transmission is utilized the self-shifting schematic diagram of main shaft power.The mobile awl dish of roller disk 57 representatives.Here the roller on the roller disk 57 55 is separated separately, so that the explanation stressing conditions.Spacing tube 37 and roller disk 57 have unequal angular velocity among the figure.

(a) figure is an original state of preparing gear shift, and the great circle of gear shift this moment frame 35 also contracts in circle but advance to keep off chain wheel 36 near roller 55.Roller 55 in dish 57 revolution, not with advance to keep off chain wheel 36 on arbitrary crest 36-e contact.At this moment, the push rod 75 that control pull rod 71 drives on it moves on the disc cam 37-1, and cam 37-1 is about to push push rod 75, after push rod 75 actions, will make 78 upsets of hoof piece by the transmission backguy, will advance to keep off chain wheel 36 and release.

When (b) figure was state shown in (a) figure, the situation of looking from gear shift frame 35 back sides was shunk back in the circle of gear shift frame 35 advance keeping off chain wheel 36.Hoof piece 78 does not overturn as yet.

(c) figure into keeps off chain wheel to be pushed by hoof piece 78, reaches the situation of gear shift frame 35 circle when outer fully; Push rod 75, backguy 74,74-2 and unillustrated total backguy are the transmission devices that makes 78 upsets of hoof piece.In this process, roller 55 just forwards next spiral tooth root to.Soon on the spiral tooth, roll, and drive roller disk 57 moves along the d direction with roller disk 57.

When (d) figure is state shown in (c) figure, from the situation of looking in gear shift frame 35 back sides, advances to keep off chain wheel and released by push-jump hoof piece 78, spiral sound of baby talk top 36-e reaches outside the circle of gear shift frame 35.In this process, push-jump hoof piece 78 turns over around hoof piece rotating shaft 78-1 and turn 90 degrees.

Figure 11 (a)---be into to keep off chain wheel 36 axially movable procedure charts (c).Cam 37-1 and roller 55 have unequal angular velocity, and arrow has been indicated sense of rotation.Advancing to keep off chain wheel 36 has the spiral tooth of twice symmetry, and f, F represent root of the tooth, and e, E represent crest.Advancing to keep off chain wheel 36 axially movable power is provided by jack-up push rod 75 by cam 37-1.

(a) among the figure, push rod 75 also withstands on the basic circle of cam 37-1, advances to keep off chain wheel 36 and is not pushed.

(b) figure expression roller has turned over e place, spiral sound of baby talk top, and this moment, cam began jack-up push rod 75.

(c) figure expression cam has pushed up far away ending to push rod 75 and has stopped point, and roller does not forward the root of the tooth F place of next spiral tooth as yet to this moment.

After (c) process, roller will roll on spiral tooth FE, realize moving axially.Can understand from above procedure chart: advance to keep off chain wheel 36 and stretch out and decide the outer process of divider 35 circle, just being roller forwards the process of next spiral sound of baby talk root F to from the crest e of a spiral tooth, and therefore, advancing to keep off not stretching out of chain wheel can form interference by pair roller.

(d) figure is the sectional view of disc cam.

(e) be to be placed among the drive wheel nodel line figure situation relatively advancing to keep off chain wheel, AoB included angular range in obtuse angle is non-cornerite district hour, diameter-changing wheel wheel footpath among the figure.Acute angle CoD is included is the non-cornerite district of diameter-changing wheel wheel footpath when maximum.Acute angle EoF institute target is into to keep off the angular range of a spiral tooth on the chain wheel, the non-cornerite scope of this angle during less than any wheel footpath.

Figure 12 is the gear shift schematic diagram.

(a) be into to keep off principle, this moment, control pull rod 71 moved on to low order end, and push rod 75 is by disc cam 37-1 jack-up, by the push-jump hoof piece 78 of driving component around the shaft 78-1 rotated 90 degree, and will advance to keep off chain wheel 36 and release left, the spiral tooth reaches outside the circle of gear shift frame 35.Roller 55 is about to roll on the chain wheel 36 spiral teeth and realize moving of d direction advancing to keep off.

(b) figure moves back the retaining schematic diagram, and advance to keep off in the circle of chain wheel 36 indentation gear shift framves 35 this moment.Control pull rod 71 moves on to high order end, the protruding tooth of stop on it 76 embeds in the breach of push rod push-plates 45 and forces 45 stalls of push rod push-plate, but push rod push-plate 45 with respect to the screw thread 37-4 that rotates for the helical movement, and the torsion that overcomes torsion spring 69 promotes push rod 46 left, push rod 46 pushes sawtooth block teeth 47, makes the engagement of sawtooth tooth on its disengaging and the sawtooth thread form pipe 54.Mobile awl dish 34 and roller move to right for 55 this moments automatically, till roller 55 is blocked the way by the outer ring of gear shift frame 35.

Move back after retaining operation finishes, control pull rod 72 returns neutral positions, and under the effect of torsion spring 69, push rod push-plate 45 is with the cycle original position, and sawtooth block teeth 47 also reset under the effect of flexible strip, are pressed in again on the sawtooth tooth of sawtooth thread form pipe 54.The ds that marks is the axial spacing of two revolution bodily form sawtooth teeth on the sawtooth thread form pipe 54 among the figure, and dx is the distances of a pair roller 55 cylndrical surface to gear shift frame 35 front-end faces.Roller 55 can be divided into two sections of b1 and b2 by work characteristics, b1 section and the effect of spiral tooth, b2 section and the 35 front-end face effects of gear shift frame of advancing to keep off chain wheel 36.

(c) be cut open advance to keep off chain wheel, from figure, can see a complete spiral tooth, the value of its axial tooth distance is d0.

In gear shift operation process of this speed changer, can be continuously advance retaining, maximum advance to keep off the value that gear number depends on d0 continuously, d0 is the integral multiple of ds.The gear number of advancing (moving back) in gear shift operation process continuously depends on the value of dx, if select retaining, its value of advancing to keep off progression is (d0-dx)/ds, and this value can not be advanced to keep off for negative or 0 expression; If select to move back retaining, its value of moving back retaining progression is dx/ds.

Figure 13 (a)-(c) is the schematic diagram that diameter-variable driving wheel changes the wheel footpath.Among the figure each conehead pin on the wheel table traction belt has been compiled number, wherein 0 is pin on the hitch frame.

Situation when (a) figure is wheel footpath maximum, wheel table traction belt total length is pulled out.

(c) figure is a wheel footpath situation hour: the part that wheel table traction belt does not participate in forming the wheel surface chain ring is reeled and is stored in core wheel.

(b) figure is in the change procedure of wheel footpath, the motion track figure of each conehead pin, and 0-0 is the movement locus of selling on the hitch frame among the figure, is straight line.Curve 1-1,2-2 among the figure ... it is respectively conehead pin 1,2 ... movement locus when the wheel footpath changes.

Shown in Figure 14 (a)-(c) is the planimetric map and the broken away view of a kind of compound conical surface dish diameter-variable driving wheel and parts

(a) be planimetric map; Compound conical surface dish among the figure is made of base cone face 80 and the crescent moon addendum cone face 81 that is mounted thereon.Wheel table traction belt is a roller chain: the part from the first joint of chain 82-0 to wide chain transition segment 82-1 is to be wide pitch chain district, and it is supported by base cone dish 80; Part from narrow chain transition segment 82-2 to flexible pull wire 83 is narrow pitch chain district, and the part that narrow chain participates in forming wheel watch chain circle is not participated in forming the part of taking turns the watch chain circle and coiled in wide chain ring internal layer by 81 supports of crescent moon addendum cone face, is supported by base cone dish 80.When the wheel footpath became big, the coiling part of narrow chain was pulled to crescent moon addendum cone face 81 from base cone dish 80 and gets on through transition inclined-plane 81-1.Crescent moon curve 81-2 is the movement locus of wide chain transition segment 82-1.

(b) be the broken away view of diameter-variable driving wheel shown in the figure, the conical surface dish of every side is all assembled by balancing disk 79, base cone face 80 and crescent moon addendum cone face 81, have hitch frame chute 80-1 on the base cone face 80, there is counterweight fin 80-3 at its back side, and axle head has splined hole 80-2.Wheel table traction belt 82 saves 82-0 from head and is supported by base cone dish 80 to the wide chain part of wide chain transition segment 82-1.In the process that the wheel footpath changes, the axle head of wide chain transition segment 82-1 rolls on curve 81-2 all the time.

(c) figure is the planimetric map of part wheel table traction belt, and 82-d section chain is the narrow pitch chain of wheel table traction belt district, and the inner plate inner width is b; The 82-c section is wide pitch chain district, and the outer plate inner width is B.82-1 is wide chain transition segment, and 82-2 is narrow chain transition segment; 82-3 is the conical surface roller of chain side; 82-4 is a drive balls.

Figure 15 (a) figure is the schematic representation that wheel table traction belt is stretched out on conical surface dish, and 84-0 is the hitch frame that partly cuts open among the figure, and there is a flat hole at its middle part, and district 82-d comes in and goes out for the narrow pitch chain of wheel table traction belt; Flat hole with hitch frame 84-0 is the boundary, narrow pitch chain district 82-d does not participate in forming the part of wheel watch chain circle, and one is connected on the flexible pull wire 83, is supported by base cone dish 80, participate in forming the part of taking turns the watch chain circle and rise, be supported on the crescent moon addendum cone face 81 by narrow chain transition segment 82-2.Narrow chain chain is between two dishes, 80 and 81 the conical surface during transition, through the guiding of inclined-plane 81-1.The wide pitch chain district 82-c of wheel table traction belt, one is wide chain transition segment 82-1, the other end is connected on the hitch frame 84.When the regulating wheel footpath, the axle head of transition segment 82-1 rolls along curve 81-2.Wide chain 82-c rolls the back and is supported by base cone face 80.Base cone dish 80, crescent moon addendum cone face 81 and balancing disk 79 usefulness bolts 85 are connected as one.

(b) figure is the situation that diameter-changing wheel wheel footpath is reduced to hour, and among the figure, the axle head of narrow chain transition segment 82-2 slides on the addendum cone face 81 on the crescent moon curve 81-2.When being supported in the narrow chain turnover crescent moon addendum cone face 81 on the base cone dish 80, the conical surface roller 82-3 of its both sides is guided by inclined-plane 81-1.Narrow chain is passed by the place, flat hole of hitch frame back side 84-4.The no rolling element in 84-4 place, the hitch frame back side, the 84-5 place is the draw-in groove that bearing pin is installed.

(c) figure is the view of hitch frame, the passage that the flat hole 84-2 of hitch frame front-end face is a chain; Front-end face and place, side have rolling element caulking groove 84-1, and rolling element 84-3 is installed.Form rolling pair with regard to the surface of contact that makes hitch frame and chute like this, helped changing the operating conditions of hitch frame.

The structural feature of control mechanism:

The gearshift program of control computer is implemented by the gear shift frame 35 that is installed on the speed changer lower shell body 42, and 40 need of stepping motor that drive gear shift frame 35 move on to the tram to gear shift frame 35 and get final product, and do not belong to power plant, can select miniature motor for use.

Control pull rod 37 usefulness three-position electromagnetic iron 70 pullings of installing on the lower shell body 42 are the implementers of gearshift retaining order, but are not the supplier of shifting power.Just guide corresponding mechanism on the driven shaft that rotates, to obtain shifting power, can select minitype electromagnet for use.

Claims (9)

1. diameter-variable driving wheel, comprise transmission shaft (32) and two awl dishes (31,34,80) mounted thereto in opposite directions and that can move to axial, it is characterized in that: between two described awl dishes, be provided with wheel table traction belt (52,82), a described end of taking turns table traction belt (52,82) links to each other with hitch frame (51,84), and the other end links to each other with backguy (50,83); Upward the reel (59) or the backguy circle (83-1) of interior dress torsion spring (64) link to each other described backguy (50, the 83) the other end with being installed in transmission shaft (32); Described hitch frame (51,84) is slidably mounted in the radial groove (51,80-1) of described two awl dishes, the conical surface of described both sides of taking turns table traction belt (52,82) and described awl dish (31,34,80) the formation kinematic pair that matches.

2. according to the described diameter-variable driving wheel of claim 1, it is characterized in that: described awl dish (31,34) radial grooves (51-1) side has transition inclined-plane (31-1); The conical surface center of described awl dish (31,34) is provided with and holds trough of belt (58); Described radial groove (51-1) is positioned on the conical surface of described awl dish (31,34) and with described appearance trough of belt (58) and communicates; The described table traction belt (52) of taking turns is duplex chain, and the conical surface of the conical surface roller (49) of its both sides rolls with the conical surface of described awl dish (31,34) and cooperates, and described backguy is two.

3. according to the described diameter-variable driving wheel of claim 1, it is characterized in that: described awl dish (80) is by base cone face (80) and be installed in it crescent moon addendum cone face (81) and balancing disk (79) on outside respectively and form; Transition inclined-plane (81-1) is arranged on the described crescent moon addendum cone face (81); Described chute (80-1) is positioned on the base cone face (80); The described table traction belt (82) of taking turns is duplex chain, and it is formed by wide chain link, wide chain transition segment (82-1), narrow chain transition segment (82-2), narrow chain link serial connection; The conical surface roller (82-3) of described wide chain link both sides rolls with the conical surface of described base cone face (80) and cooperates, and the conical surface roller (82-3) of described narrow chain link both sides rolls with the conical surface of described crescent moon addendum cone face (81) and cooperates; Described backguy (83) is a flexible pull wire; Described hitch frame (84) bi-side and front-end face all are equipped with rolling element (84-3); Have chain channel (84-2) on the described hitch frame (84), described narrow chain link is come in and gone out thus.

4. an application rights requires the automatic micro-shift transmission of one of 1～3 described diameter-variable driving wheel, comprise case of transmission (42,43,44), input shaft (41), output shaft (32), it is characterized in that: case of transmission also is equipped with described diameter-variable driving wheel in (42,43,44); The transmission shaft of described diameter-variable driving wheel (32) is gone up the opposite side of input shaft (41) from described housing (44) and is stretched out as output shaft; The awl dish (31,80) that described diameter-variable driving wheel is fixed on output shaft (32) clutch end one side is the fixed cone dish, and another awl dish (34,80) is mobile awl dish; Described input shaft (41) is equipped with sizing wheel (60,68), and affiliated sizing wheel (60,68) and wheel table traction belt (52,82) link together by the driving belt (33) that is engaged with; Between described sizing wheel (66,68) and diameter-variable driving wheel, be provided with the Idle wheel (66) of driving belt (33), described Idle wheel (66) is fixed on the housing (41,44) by pivoted frame (67), and the control latch device of control described displacement disc (34,80) axial motion also is housed in described housing (42,44).

5. according to the described automatic micro-shift transmission of claim 4, it is characterized in that: described sizing wheel (60)) and or Idle wheel (66) by wheel disc (68) and gear pin (68-3) formation; Described gear pin (68-3) is evenly arranged in the hole (68-2) on the wheel disc (68), and the axis spacing of adjacent bearing pin (68-3) equates with the pitch of described driving belt (33) chain link.

6. according to the described automatic micro-shift transmission of claim 4, it is characterized in that: described control blocking means comprises roller disk (57), sawtooth thread form pipe (54), the spacing tube (37) of gear shift device, advancing means, gear shift device and displacement disc (34, a 80) side that is installed on the housing (42); The turning rolls (56) that a pair of radial symmetric is arranged is housed on the roller disk (57) of described displacement disc (34, a 80) side; Described sawtooth thread form pipe (54) is contained in the outside of roller disk (57); Described sawtooth thread form pipe (54) and displacement disc (34,80) are fixed together; Described gear shift device comprises gear shift frame (35) and is installed in and wherein movably advances to keep off chain wheel (36); Described gear shift frame (35) be installed in two threaded stems in the housing (42,43,44) (38,38-2) and match; Described gear shift frame (35) is driven and is subjected to displacement by secondary band (39-1) synchronously, synchronous band (39), threaded stem (38), deputy thread bar (38-2) by stepping motor (40); Roller (55) on the described turning rolls (56) is installed in end face one side of described gear shift frame (35); Described spacing tube (37) is fixed on the other end of output shaft (32), and tooth of sawtooth thread form piece (47) is meshed with the tooth of described sawtooth thread form pipe (54) on it; Described advancing means comprises the hoof piece (35-1) that is installed in a pair of synchronization motion in gear shift frame (35) the both sides hoof piece boxes (351), and it radially is arranged in the described both sides of entering to keep off chain wheel (36), controls described the flexible of chain wheel (36) that advance to keep off; Described gear shift device comprises three-position electromagnetic iron (70), control pull rod (71), transfer backguy (77-1) and main drawing line (77); The control pull rod (71) that is installed on the described housing (42,43-44) matches with disc cam (371) or push rod push-plate (45) on the described spacing tube (37), control push-jump hoof piece (78) or back down the action of sawtooth block teeth (47), regulating displacement disc (34,80) moves forward and backward

7. according to the automatic micro-shift transmission of the described application diameter-changing wheel of claim 4, it is characterized in that: described spacing tube (37) cylindrical shell one end has 4 chutes (37-2), and 4 sawtooth thread form pieces (47) are contained in the square through hole of chute (37-2) and annular end cap (37-3) formation; Flexible strip (48) acts on the groove (47-3) of each sawtooth thread form piece (47); The spacing drum outer wall has the push rod (46) of 4 pushing tow sawtooth thread form pieces (47), and the head (46-1) of push rod (46) acts on the groove (47-1) of sawtooth thread form piece (47); The spacing tube the other end has a cam (37-1), and the axle head that is positioned at cam (37-1) side has screw thread (37-4), and push rod push-plate (45) passes through screw (45-2) spinning at its middle part on screw thread (37-4); Between cam (37-1) and the push rod push-plate (45) torsion spring (69) is housed, collude respectively on spacing tube (37) cylindrical shell and push rod push-plate (45) at its two; Outer catch (53), the back-up ring (32-2) of being equipped with of push rod push-plate (45).

8. want 4 described automatic micro-shift transmissions according to right, it is characterized in that: the revolution bodily form teeth that described sawtooth thread form pipe (54) surface has multiple tracks to be parallel to each other, its cross section is a sawtooth.

9. want 4 described automatic micro-shift transmissions according to right, it is characterized in that: described advance to keep off the spiral tooth of two sections symmetrical distributions (36-e) is arranged on the chain wheel (36), be two sections planes between two pairs of spiral teeth.

Images