CN201057250Y

CN201057250Y - Stepless speed changer with capstan piece

Info

Publication number: CN201057250Y
Application number: CNU2007201524809U
Authority: CN
Inventors: 贾文良
Original assignee: 贾文良
Current assignee: Yiwu Xibeihu Special Vehicle Co., Ltd.
Priority date: 2006-08-04
Filing date: 2007-06-17
Publication date: 2008-05-07
Anticipated expiration: 2017-06-17

Abstract

The utility model discloses a continuously variable transmission of stripy disks, which is mainly applied in off-road vehicles of low speed and big torque. Driving wheels are elastic extended-groove wheel with two disks, and driven wheels are elastic clamped-groove wheels with two disks and are driven by a belt pulley of variant trapezium-shaped cross section. As the disks adopts convex concave extending lines that are evenly distributed, and also because edge lines on the inner side of the trapezium-shaped belt pulley are designed as W-shaped, the belt in the V-shaped groove can slide outwards after being compressed without affecting the transmission, thereby improving performance of the continuously variable transmission.

Description

The stepless speed variator that the line disc is arranged

Technical field

The utility model relates to a kind of automobile-used buncher, and especially the V-shaped groove both sides are bunchers that the line disc is arranged on driving wheel and follower.

Background technique

At present, common automobile-used tyre type buncher is to expand groove by the V font elasticity of pushing or loosen on the driving wheel, makes the change of groove generation width, forces the outside or inwardly slip of chape in the groove, thereby changes the diameter of driving wheel; When driving wheel is squeezed, the chape that V font elasticity expands in the groove just outwards slides, driving wheel is directly through becoming big, because chape is rabbeted again on the V of follower font elasticity clip slot, under the affecting of belt pulley, belt pressurized on the follower in the V font elastic groove is to embedded, and the follower diameter just diminishes, and speed strengthens; Then slow down in the time of in like manner can reducing driving source.But this type of speed changer is mainly by the principle of rigid extruding belt slippage, and the friction factor of this drivign belt can not diminish, thereby causes speed change to owe quick, and torque drive efficient is not high, still is not good problem to the cross-country ability of car.

Someone has done research and has applied for that patent, patent publication No. are CN2859092 for improvement, name is called: belt transmission stepless change automatic clutch device.This patent mainly is the disc face to the V font groove both sides on driving wheel and the follower, set up the radial concave-convex grain of smooth surface, this has just reduced belt the friction factor that slides to inward-outward direction in groove, increased simultaneously the friction factor of belt again in transmission direction, this has solved chape to a certain extent in same V font groove, and the different direction motion can produce the problem of different coefficients of friction.But since the radial streakline on the card to be the centre area close, the phenomenon that Pan Yuanqu is sparse gradually causes the speed change can be uneven, has the problem of speed change poor stability.

Summary of the invention

The utility model has solved the speed change inequality, and torque drive efficient is not high, and the problem of poor stability provides a kind of buncher that the line disc is arranged of Xiang Dui Zhuo cloth.

The utility model has also further solved speed changer and has owed quick, and the problem that the cross-country ability of car is not good provides a kind of buncher that the line disc is arranged that can effectively allow the drivign belt slippage.

Its technical problem that solves the utility model adopts the ground technological scheme to be: clutch is a centrifugal clutch, and it plays a part the buncher starting and stops; Driving wheel is that the elasticity of double plate sheet expands sheave, is made up by coaxial main slip disc and main fixed disc, and forms by pining down behind the main movable disc of the connection of the extension spring in the bowl-type outer cover, and what these parts were formed is the driving wheel assembly; Follower is the elastic clip sheave of double plate sheet, by coaxial from the slip disc with from the fixed disc combination, and push down by stage clip Rui Gai on the axle outer end and to form from the slip disc outside, what these parts were formed is the follower assembly; On the expansion sheave and the groove two inboard cards on the clip slot wheel of double plate sheet, respectively be provided with the uniform concavo-convex involute strain line of phase time, it has played at belt plastid on the same disc when not equidirectional Porridge wipes, but can produce the different direction effect of friction factor uniformly; The groove cross section that expands sheave and clip slot wheel is in the shape of the letter V, and the width of V word can be regulated with the slip of card, and this structure has played the effect that the chape in the groove outwards can be extruded; The chape cross section is the trapezoidal of variant, the trapezium structure of this variant, the function that has further auxiliary belt circle outwards to extrude.

As a kind of preferable methods be: centrifugal clutch is the centrifugal device of Samsung bell, and the guiding groove of Samsung bell is located on the bowl-type outer cover of extension spring periphery, and is connected with the quill of main movable disc; Shoulder top one side of three star bell bodies on the Samsung bell device is provided with baffle plate; Like this, when motor quickens, also quicken with its centrifugal device that axially directly docks, the Samsung bell just gets rid of to radial outside with centrifugal force, but under the traction of bowl-type outer cover and three chutes, force the centrifugal power of being used to of Samsung bell bell body to be divided again and rush to summit over, push to V-shaped groove, played chape crowded purpose outside groove thereby promote main slip disc to the baffle plate of the last side of shoulder.

As a kind of preferable methods be: on the chape between driving wheel and the follower, be provided with tensioner apparatus; It mainly has been that chape in preventing to operate produces skidding because of beating, and this is long partially to wheelspan, and the go-anywhere vehicle that easily jolts again is particularly important.

As a kind of preferable methods be: on two cards of the double plate sheet inboard of expansion sheave and on two cards of the double plate sheet inboard of clip slot wheel, respectively be provided with the uniform relatively concavo-convex involute strain line of density, totally 16 of involute lines, divide 4 long, in 4, article 8, weak point, the length ratio of its 3 kinds of lines is in proper order: 1: 0.7-0.8: 4.5-5.5, and 4 pieces such as grade that are divided into altogether arranged evenly, every contains the strain line bar ordering that has 4 involutes and is: 1 is long every 1 weak point, in 1, every 1 weak point; This is that the best as far as possible strain line of a kind of effect through changing design and preferably coming out is arranged from the starlight line, it is middle close that it has solved the starlight line on the card effectively, the problem that edge direction is sparse gradually, thus the problem of the transmission performance difference that causes because of friction factor is uneven also solved.

As a kind of preferable methods be: the concavo-convex involute strain line on the card of expansion sheave and clip slot wheel, texture print relatively in twos and present; The lines of concavo-convex involute towards, be to launch with turning to of belt pulley is consistent; Have only the combination of this parts, just can play perfect gearing.

As a kind of preferable methods be: expand on the card of sheave and clip slot wheel, the strain line line body of concavo-convex involute is slick and sly basse-taille shape, and the degree of depth of line is the 1-2 millimeter, and the width of ripple is located at the 5-15 millimeter, and the roughness of each card is at 0.8 micron; The V-shaped groove side of this light face slyness, basse-taille shape helps reducing the friction factor that chape moves outward, increases the friction factor of chape transmission direction.

As a kind of preferable methods be: stage clip is set as inside and outside two-part, is separated by a cast plate, and cast plate and driven shaft are fixed; This structure, the pressure of stage clip to the slip disc is separated with the pressure of stage clip to the tubular end ratchet, make the tubular end ratchet when running, the power of trembling that the slip teeth that the hoof piece is produced is jumped, can not influence stage clip to constant pushing, thereby guarantee that effectively stage clip is to providing stable clip slot power from the slip disc from the slip disc.

As a kind of preferable methods be: it is wide that cross section is the trapezoidal chape outside of variant, and inboard narrow, a narrow side line is slick and sly W shape; The V belt of this shape, when being subjected to the pinching power of V-shaped groove, can make slightly flexible rubber plastid be bending deflection trend, pinching power in the plastid just is decomposed, form one outside potential energy, this just has been equivalent to increase the effect of one outside anti-frictional force, also just plays the outer easily sliding effect of chape.

As a kind of preferable methods be: it is the flute profile chape that cross section is the trapezoidal chape of variant, be slick and sly W shape at high trapezoid slice inner side edge profile, low trapezoid slice inner side edge profile becomes horizontal line, and reciprocal with the extension loop cycle of vertical flute profile line, alternately presents; This structure explanation also has same effect on the flute profile belt.

As a kind of preferable methods be: cross section is the trapezoidal chape inner side plane of variant and is made as fluid surface, longitudinal section inner side edge profile is wave molding, height gradual change extension that the cross section is trapezoidal with the fluctuating cycle of wave molding, be slick and sly W shape at high trapezoid slice inner side edge profile, low trapezoid slice inner side edge profile becomes horizontal line, and reciprocal with the extension loop cycle of vertical swash, gradual change presents; This employing inner side surface is the Toothed belt of fluid line curved surface, has also eliminated the stress concentration point that easily breaks, and can increase the service life relatively.

The beneficial effects of the utility model are: on the disc of V-type groove both sides, mainly adopted smooth and uniform concavo-convex involute line pattern, inward flange line with the ladder diagram of chape cross section is set as W shape again, this shape and structure, both strengthened the ability of the outside slip that produces when chape is squeezed, and do not influence the tractive ability of the transmission direction of chape again, improved the service behaviour of stepless speed variator, make transmission operating sensitiveer, speed change is more stable, torque drive efficient is higher, and can deacclimatize cross-country ability effectively.

Description of drawings

Fig. 1 is the structural representation sectional drawing of the utility model stepless speed variator that the line disc is arranged;

Fig. 2 is the work schematic representation of internal tensional type Idle wheel in the utility model;

Fig. 3 is the work schematic representation of external-compression type Idle wheel in the utility model;

Fig. 4 is the protruding involute line pattern of a card fovea superior schematic representation in the utility model;

Fig. 5 is that cross section is the stressed schematic representation of the trapezoidal chape of variant in the utility model.

Among the figure: 1, initiatively expand sheave, 2, chape, 3, the slave clip sheave, 4, Idle wheel, 5, lead movable disc, 6, main fixed disc, 7, the bowl-type outer cover, 8, extension spring, 9, chute, 10, star bell body, 11, baffle plate, 12, from the slip disc, 13, from fixed disc, 14, stage clip, 15, end cap, 16, the tubular end cam, 17, the hoof piece, 18, V-shaped groove, 19, involute strain line, 20, card, 21, trapezoidal 22, the cast plate of variant.

Embodiment

Below by specific embodiment, and in conjunction with the accompanying drawings, the technical solution of the utility model is described in further detail.

Embodiment:

Among Fig. 1, the utility model drives slave clip sheave 3 by initiatively expanding sheave 1 through chape 2, and assists belt to stablize transmission by Idle wheel 4 devices, produces contact skidding after the inequality because of beating to prevent belt.Idle wheel 4 can be as the internal tensional type among Fig. 2, also can be as the external-compression type among Fig. 3.External-compression type among Fig. 3 in use, artificially control by the driver, when shifting gears, depress Idle wheel 4, allow chape 2 loosen, make the chape 2 that initiatively expands in the sheave 1 can alleviate radial pressure and slippage outside groove, and then decontrol step, allow Idle wheel 4 pop into position work on, to reach the purpose of being convenient to shift gears.

Among Fig. 1, initiatively expanding sheave 1 is the elasticity expansion sheave of double plate sheet, is made up by coaxial main slip disc 5 and main fixed disc 6, and forms by pining down behind the movable disc 5 of the 8 connection masters of the extension springs in the bowl-type outer cover 7; Initiatively expand the centrifugal clutch that linking on the sheave 1, it is to be provided with three chutes 9 on bowl-type outer cover 7, in have three star bell bodies 10, a side is provided with baffle plate 11 on the shoulder of star bell body 10.

Slave clip sheave 3 is elastic clip sheaves of double plate sheet, by coaxial making up from slip disc 12 and from fixed disc 13, and forms by pushing down from stage clip 14 auspicious lid 15 on the axle outer end in slip disc 12 outsides; On slave clip sheave 3, be provided with the engaging and disengaging gear of the directed rotation of a double speed, it is a tubular end ratchet 16 that links to each other from the end cap 15 with buffering inertia, middle stage clip 14 is set as inside and outside two-part, is separated by a cast plate 22, and cast plate 22 is fixed with driven shaft; This structure, the pressure of 14 pairs of tubular end ratchets 16 of pressure and stage clip of 14 pairs of slip discs of stage clip is separated, make tubular end ratchet 16 when running, the power of trembling that the slip teeth of hoof piece 17 generations is jumped can consume on spring, do not remove to influence stage clip to constant pushing, thereby guarantee that effectively 14 pairs of stage clips provide stable clip slot power from slip disc 12 from slip disc 12.

When with initiatively expand motor that sheave 1 directly docks and be in and stop burning or during idling mode, the centrifugal force that three star bell bodies 10 in bowl-type outer cover 7 upper hopper chutes 9 are produced is zero or less than the baffle plate 11 that promotes star bell body 10 shoulder tops, at this moment, initiatively expand the movable disc 5 of master of V-shaped groove 18 1 sides on the sheave 1, under the effect of extension spring 8, the width that makes V-shaped groove 18 greater than or just equal the width of chape 2, make drivign belt circle 2 produce static or idle running, the end can drive slave clip sheave 3, is equivalent to power cut; When throttle strengthens, when engine speed improved, the centrifugal force that three star bell bodies 10 on the centrifugal clutch radially throw away increased, and under the effect of the chute on the bowl-type outer cover 79, it takes on the baffle plate 11 of top to force star bell body 10 to be rushed to summit by force, thereby overcome the pulling force of extension spring 8, further promote main movable disc 5, V-shaped groove 18 is narrowed down to V-shaped groove 18 extruding, at this moment, initiatively expand in the V-shaped groove 18 on the sheave 1, chape 2 is forced to slide outside groove, and this has just increased the diameter of driving wheel relatively; Simultaneously, the pulling force that is born on the chape 2 is also increasing, and has overcome the folder power of 14 pairs of V-shaped grooves 18 of slave clip sheave 3 compression springs, and chape 2 is squeezed embedding in groove, and this has just dwindled the diameter of follower relatively, thereby has increased velocity ratio speed; In like manner, when reducing throttle, engine retard will diminish by more living driving wheel relatively, and it is big that follower becomes relatively, thereby reduced velocity ratio speed, and this has just reached infinite variable speed purpose.

Being not difficult to find out from above-mentioned principle inference process, effectively reaching one of stepless change key of high-quality, is to solve chape 2 can produce the uniform friction factor of difference when different direction moves in same V font groove 18 problem.The utility model is initiatively to expand on two cards 20 of double plate sheet inboard of sheave 1 and on two cards 20 of the double plate sheet inboard of slave clip sheave 3, respectively be set as the uniform relatively concavo-convex involute strain line 19 of the sort of density shown in Figure 4, this has at first solved and has reduced the friction factor that chape 2 slides to card 20 outward edges, increased the friction factor that moves to transmission direction again, because involute strain line 19 has been optimized the best of breed data as much as possible, overcome on the card 20 close in the middle of the starlight shape strain line rationally and effectively, the not uniform phenomenon that the edge is rare, thereby both solved because of the uneven problem of the uneven speed that produces of friction factor, having solved again on the card 20 has different direction to move the problem of the different friction ractor that produce.In addition, it is the corrugated shape that chape 2 is set as inner side surface, and the promptly main trapezoidal inside edge line that is set as with chape 2 cross sections is slick and sly W shape.In Fig. 5 as can be seen, chape 2 when this cross section variant trapezoidal 21, after in V-shaped groove 18, being subjected to the extruding force of both sides, that slightly flexible rubber plastid will produce bending deflection, thereby power is decomposed, form one outside potential energy, this just has been equivalent to increase one outside anti-frictional force energy, it is outer easily sliding also just to play chape 2, and this has effect same with the friction factor that minimizing chape 2 slides to V-shaped groove 18 outsides.

Claims

1. the stepless speed variator that the line disc is arranged is initiatively to expand sheave (1) by clutch linkage to come driven transmission clip slot wheel (3) through the chape (2) of the slippage of taking advantage of a situation; It is characterized in that: clutch is a centrifugal clutch; Driving wheel is that the elasticity of double plate sheet expands sheave, is made up by coaxial main slip disc (5) and main fixed disc (6), and forms by pining down behind the main movable disc of the connection of the extension spring (8) in the bowl-type outer cover (7); Follower is the elastic clip sheave of double plate sheet, by coaxial from slip disc (12) with from fixed disc (13) combination, and push down by stage clip (14) Rui Gai (15) on the axle outer end and to form from slip disc (12) outside; On the expansion sheave and the groove two inboard cards (20) on the clip slot wheel of double plate sheet, respectively be provided with concavo-convex strain line (19); The groove cross section that expands sheave and clip slot wheel is in the shape of the letter V, and the width of V word can be regulated with the slip of card (20); Chape (2) cross section is trapezoidal (21) of variant.

2. the stepless speed variator that the line disc is arranged according to claim 1 is characterized in that: described centrifugal clutch is the centrifugal device of Samsung bell, and the guiding groove of Samsung bell is located on the bowl-type outer cover (7) of extension spring periphery, and is connected with the quill of main movable disc; Shoulder top one side of three the star bell bodies (10) on the Samsung bell device is provided with baffle plate (11).

3. the stepless speed variator that the line disc is arranged according to claim 1 is characterized in that: on the chape between described driving wheel and the follower (2), be provided with Idle wheel (4) device.

4. the stepless speed variator that the line disc is arranged according to claim 1, it is characterized in that: on two cards (20) of the double plate sheet inboard of described expansion sheave and on two cards (20) of the double plate sheet inboard of clip slot wheel, respectively be provided with the uniform relatively concavo-convex involute strain line (19) of density, totally 16 of involute lines (19), 4 of branches are long, article 4, in, article 8, weak point, the length ratio of its 3 kinds of lines is in proper order: 1: 0.7-0.8: 4.5-5.5,4 pieces such as grade that are divided into altogether arranged evenly, every contains strain line (19) the bar ordering that has 4 involutes and is: 1 long every 1 weak point, in 1, every 1 weak point.

5. according to claim 1 or the 4 described stepless speed variators that the line disc is arranged, it is characterized in that: the concavo-convex involute strain line (19) on the card of expansion sheave and clip slot wheel, texture print relatively in twos and present; The lines of concavo-convex involute towards, be to launch with turning to of belt pulley is consistent.

6. according to claim 1 or 4 or the described stepless speed variator that the line disc is arranged, it is characterized in that: expand on the card (20) of sheave and clip slot wheel, the strain line line body of concavo-convex involute is slick and sly basse-taille shape, the degree of depth of line is the 1-2 millimeter, the width of ripple is located at the 5-15 millimeter, and the roughness of each card (20) is at 0.8 micron.

7. the stepless speed variator that the line disc is arranged according to claim 1 is characterized in that: described stage clip (14) is set as inside and outside two-part, is separated by a cast plate (20), and cast plate (20) is fixed with driven shaft.

8. according to claim 1 or 2 or 3 or the 4 or 7 described stepless speed variators that the line disc is arranged, it is characterized in that: it is wide that described cross section is chape (2) outside of variant trapezoidal (21), and inboard narrow, a narrow side line is slick and sly W shape.

9. according to claim 1 or 2 or 3 or the 4 or 7 described stepless speed variators that the line disc is arranged, it is characterized in that: it is flute profile chape (2) that described cross section is the trapezoidal chape of variant (2), be slick and sly W shape at high trapezoid slice inner side edge profile, low trapezoid slice inner side edge profile becomes horizontal line, and reciprocal with the extension loop cycle of vertical flute profile line, alternately present.

10. according to claim 1 or 2 or 3 or the 4 or 7 described stepless speed variators that the line disc is arranged, it is characterized in that: chape (2) inner side plane that described cross section is variant trapezoidal (21) is made as fluid surface, longitudinal section inner side edge profile is wave molding, height gradual change extension that the cross section is trapezoidal with the fluctuating cycle of wave molding, be slick and sly W shape at high trapezoid slice inner side edge profile, low trapezoid slice inner side edge profile becomes horizontal line, and reciprocal with the extension loop cycle of vertical swash, and gradual change presents.