CN2833245Y

CN2833245Y - Automatic stepless transmission

Info

Publication number: CN2833245Y
Application number: CN 200520062848
Authority: CN
Inventors: 刘海平
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-08-08
Filing date: 2005-08-08
Publication date: 2006-11-01
Anticipated expiration: 2015-08-08

Abstract

The utility model relates to an automatic stepless speed changing device, which comprises a driving shaft, wherein the driving shaft can drive a rotating driving disc and the driving disc can drive a rotating clutch wheel component. The driving shaft is provided with two mutually parallel guide slots, the driving shaft is sheathed with an eccentric plate which is provided with a notch and a compressible elastic adjustment mechanism is arranged between the notch and the driving shaft. The driving disc is arranged on the eccentric plate via a bearing, the eccentric plate can eccentrically move corresponding to the axis direction of the driving shaft with the adjustment of the elastic adjustment mechanism, and meanwhile, the eccentric plate can drive the driving disk to eccentrically move. The utility model can compress or loosen the elastic adjustment mechanism according to load and can further and automatically adjust the offset amount of the eccentric plate and the driving shaft, the eccentric plate can drive the driving disc to move so as to adjust the offset amount of the driving disc and offset amount needs not to be manually adjusted. The utility model has the advantages of automatic transmission ratio adjustment, simple structure, low cost, low failure rate and convenient operation.

Description

Automatic stepless speed variator

Technical field

The utility model relates to a kind of gear, more particularly, relates to a kind of automatic stepless speed variator.

Background technique

Used gear widely in the machinery such as bicycle now, electric drive car, automobile, batcher, reeler.These gears are the structure of gear graduation structure or clutch eccentric normally.The gear graduation structure is to utilize big or small gear meshing transmission to realize the purpose of speed change, and this kind of drive is unfavorable for using efficiently for a long time owing to the collision of gear produces bigger noise and friction.

The structure of clutch eccentric can be with reference to No. the 92105836.5th, Chinese utility model patent " infinitely variable speed device of slide block eccentric type ", as Fig. 7, shown in Figure 8, wherein, disclosed speed change gear 4 comprises fixed tube 41 in this patent, support column 42, jack-post 425, pawl 431,432, strut spring 433, slide bar 44, U-shaped are actuated frame 45, tether screw 451, coupling component 452, ball 453, the component such as two ends 46,461 of controlling part 454,455 and wire rope constitute.Its mechanism is: by the wire rope of Joystick pulling 46 or 461, pulling 455, interlock 454,453,452,451,431,432; Pawl 431,432 is slided along slide bar 44, make support column 42, related footpath ditch dish 1, relative fixed pipe 41, just clutch component 2,2a work are regulated the action of eccentric size relatively, to reach the effect of handling and controlling speed change.The complex structure of this speed change gear, and need be by manually regulating.Certain at some power that need import, and need regulate the occasion of gear ratio according to loading, when for example the reel of batcher constantly is involved in cloth, the occasion that load constantly increases, the speed change gear of this structure can't adapt to.

The model utility content

The technical problems to be solved in the utility model is, the defective at the speed change gear of the above-mentioned eccentric stepless speed variator of prior art provides a kind of offset of can regulating automatically to regulate automatic stepless speed variator gear ratio, simple in structure.

The technological scheme that its technical problem that solves the utility model adopts is: construct a kind of automatic stepless speed variator, comprise driving shaft, drive the drive plate that rotates by described driving shaft, and drive the clutch pinion assembly that rotates by described drive plate.Offer two guiding grooves that are parallel to each other on the outer surface of described driving shaft; Described driving shaft is arranged with the eccentric disk with breach in the position of described guiding groove, and the breach of described eccentric disk comprises the parallel-segment of moving in the direction parallel with described guiding groove with described guiding groove applying, the described eccentric disk of restriction; Between the inboard of described breach and described driving shaft periphery, be provided with compressible elastic regulating structure; Described drive plate by Bearing Installation on described eccentric disk, and described eccentric disk is made the eccentric motion with respect to the vertical offset of described driving shaft axis under the adjusting of described elastic regulating structure, and described eccentric disk drives described drive plate and makes eccentric motion simultaneously.

In automatic stepless speed variator described in the utility model, the breach of described eccentric disk also is included in the terminal arc section that be provided with, that cooperate with described driving shaft periphery of described parallel-segment.

In automatic stepless speed variator described in the utility model, described elastic regulating structure is to be arranged on the breach inboard of described eccentric disk and spring or the rubber between the described driving shaft periphery.Be provided with first groove in the inboard of described eccentric disk, described driving shaft is provided with second groove with respect to the position of described first groove; Described spring or rubber are arranged in described first groove and second groove.

Perhaps, in automatic stepless speed variator described in the utility model, described elastic regulating structure comprises the chamber that is arranged on the described driving shaft, the piston of fixedlying connected with described eccentric disk; In described chamber, charge into the gas or the liquid of certain pressure.Perhaps, described elastic regulating structure comprises the chamber that is arranged on the described eccentric disk, the piston of fixedlying connected with described driving shaft; In described chamber, charge into the gas or the liquid of certain pressure.

In automatic stepless speed variator described in the utility model, half of the difference of the internal diameter of described bearing and the external diameter of described driving shaft is the maximum eccentricity amount of described drive plate.The thickness of described eccentric disk on the center line parallel with described guiding groove is the minimum offset of described drive plate.

Implement automatic stepless speed variator of the present utility model, have following beneficial effect: automatic stepless speed variator of the present utility model can or unclamp elastic regulating structure according to load compression, and then regulate the offset of eccentric disk and driving shaft automatically, and drive the drive plate motion by eccentric disk, thereby regulate the offset of drive plate, need not manually to regulate offset, have can regulate automatically gear ratio, simple in structure, effectively reduce cost, reduce rate of fault, advantages of simple operation.

Description of drawings

The utility model is described in further detail below in conjunction with drawings and Examples, in the accompanying drawing:

Fig. 1 is the front schematic view of the driving shaft of the utility model automatic stepless speed variator;

Fig. 2 is that the A of driving shaft of Fig. 1 is to schematic representation;

Fig. 3 is the front schematic view of the eccentric disc of the utility model automatic stepless speed variator;

Fig. 4 is the cooperation schematic representation of the bearing of the utility model automatic stepless speed variator first embodiment when being in maximum eccentricity amount, eccentric disk, driving shaft;

Fig. 5 is the cooperation schematic representation of the bearing of the utility model automatic stepless speed variator first embodiment when being in minimum offset, eccentric disk, driving shaft;

Fig. 6 is the cooperation schematic representation of the bearing of the utility model automatic stepless speed variator second embodiment when being in maximum eccentricity amount, eccentric disk, driving shaft;

Fig. 7 is the cross-sectional schematic of existing eccentric stepless speed variator;

Fig. 8 is the schematic representation of speed change gear of the speed changer of Fig. 7.

Embodiment

As Fig. 1 to shown in Figure 6, the clutch pinion assembly that automatic stepless speed variator of the present utility model comprises driving shaft 10, be set in eccentric disk 20 on the described driving shaft 10, be arranged on elastic regulating structure 30 between described eccentric disk 20 and the described driving shaft 10, be installed in the drive plate on the described eccentric disk 20 and driven rotation by affiliated drive plate by bearing 50.Wherein, described drive plate and clutch pinion assembly are not limited to the structural type in the background, also can be the structure of other clutch types.

As shown in Figure 1 and Figure 2, offer two guiding grooves 11 that are parallel to each other on the outer surface of described driving shaft 10.As shown in Figure 3, described eccentric disk 20 probably is " C " shape, has the breach 21 that cooperates with described driving shaft 10.Described breach 21 comprises the parallel-segment 22 with described guiding groove 11 parallel applyings, and at the described parallel-segment 22 terminal arc sections 23 that are provided with.When described eccentric disk 20 is set on the described driving shaft 10, the parallel-segment 22 of eccentric disk 20 is fitted with the guiding groove of driving shaft 10 11, make described eccentric disk 20 only can on the direction parallel, move, and can't do rotation with respect to driving shaft 10 with described guiding groove 11.

As Fig. 4, shown in Figure 5, described elastic regulating structure 30 is arranged between described eccentric disk 20 and the described driving shaft 10, and in the present embodiment, described elastic regulating structure 30 is a spring 31, can certainly be other elasticity (for example rubber, shell fragment etc.).In order to make described spring 31 can better be arranged between described eccentric disk 20 and the described driving shaft 10, be provided with first groove 24 in the inboard of described eccentric disk 20, described driving shaft 10 is provided with second groove 12 with respect to the position of described first groove 24; Described spring 31 is arranged in described first groove 24 and second groove 12, thereby prevents the displacement of spring 31.

As shown in Figure 4, the inner ring sleeve of the bearing 50 of drive plate is on described eccentric disk 20, and under the effect of described spring 31, described eccentric disk 20 is positioned at maximum eccentric position, and just described drive plate is positioned at the position of maximum eccentricity amount.When described driving shaft 10 rotated, described drive plate rotated with driving shaft 10.The maximum eccentricity amount of described drive plate is half of difference of the diameter of the internal diameter of described bearing 50 and described driving shaft 10, the maximum eccentricity amount of automatic stepless speed variator of the present utility model just, the minimum deceleration that has determined this automatic stepless speed variator is than, maximum (top) speed and minimum torque.

Automatic stepless speed variator of the present utility model is mainly used under the operating conditions of load variations, for example electric motor car, batcher etc.During less than certain value, this certain value is the rigidity of spring 31 in the present embodiment in load, i.e. load can't pressure spring 31, makes drive plate remain on maximum offset.When load during greater than this certain value, spring 31 is compressed, thereby eccentric disk 20 slides to the axis direction of driving shaft 10, makes the offset of drive plate reduce.Along with the minimizing of drive plate offset, the rotating ratio of this automatic stepless speed variator strengthens, rotating speed reduces, torque strengthens.When input power was constant, in the range of linearity of spring 31, along with the variation of load, the output speed and the torque of automatic stepless speed variator were adjusted automatically.

As shown in Figure 5, behind the arc section 23 moral inner edge holddown springs 31 of eccentric disk 20, when running into the outer periphery of described driving shaft 10, be the position of the minimum offset of drive plate, just the minimum speed of the utility model automatic stepless speed variator, maximum (top) speed than and the state of peak torque.Therefore, the thickness of described eccentric disk 20 on the center line parallel with described guiding groove 11 has determined the minimum offset of described drive plate.

As shown in Figure 6, be second embodiment of the elastic regulating structure 30 of automatic stepless speed variator of the present utility model, it comprises the chamber 13 that is arranged on the described driving shaft 10, the piston 24 of fixedlying connected with described eccentric disk 20; In described chamber 13, charge into the gas or the liquid of certain pressure.Certain described chamber 13 can be arranged on the described eccentric disk 20 and being fixed on the described driving shaft 10 of described piston 24 correspondences.During less than the pressure of gas in the chamber 13 or liquid, described piston 24 is in distal-most end in load, and promptly described eccentric disk 20 is in the position of maximum offset, that is to say that drive plate is in maximum eccentric position.And when the load increase, when surpassing the pressure of described gas or liquid, promote described piston 24 described gas of compression or liquid, reduce the offset of eccentric disk 20, just reduce the offset of drive plate, make rotating ratio increasing, torque increasing, rotating speed reduce, reach the effect of automatic adjusting output speed and torque.

Claims

1, a kind of automatic stepless speed variator comprises driving shaft, drives the drive plate that rotates by described driving shaft, and drives the clutch pinion assembly that rotates by described drive plate; It is characterized in that, offer two guiding grooves that are parallel to each other on the outer surface of described driving shaft; Described driving shaft is arranged with the eccentric disk with breach in the position of described guiding groove, and the breach of described eccentric disk comprises the parallel-segment of moving in the direction parallel with described guiding groove with described guiding groove applying, the described eccentric disk of restriction; Between the inboard of described breach and described driving shaft periphery, be provided with compressible elastic regulating structure; Described drive plate by Bearing Installation on described eccentric disk, and described eccentric disk is made the eccentric motion with respect to the vertical offset of described driving shaft axis under the adjusting of described elastic regulating structure, and described eccentric disk drives described drive plate and makes eccentric motion simultaneously.

2, automatic stepless speed variator according to claim 1 is characterized in that, the breach of described eccentric disk also is included in the terminal arc section that be provided with, that cooperate with described driving shaft periphery of described parallel-segment.

3, automatic stepless speed variator according to claim 1 and 2 is characterized in that, described elastic regulating structure is to be arranged on the breach inboard of described eccentric disk and spring or the rubber between the described driving shaft periphery.

4, automatic stepless speed variator according to claim 3 is characterized in that, is provided with first groove in the inboard of described eccentric disk, and described driving shaft is provided with second groove with respect to the position of described first groove; Described spring or rubber are arranged in described first groove and second groove.

5, automatic stepless speed variator according to claim 1 and 2 is characterized in that, described elastic regulating structure comprises the chamber that is arranged on the described driving shaft, the piston of fixedlying connected with described eccentric disk; In described chamber, charge into the gas or the liquid of certain pressure.

6, automatic stepless speed variator according to claim 1 and 2 is characterized in that, described elastic regulating structure comprises the chamber that is arranged on the described eccentric disk, the piston of fixedlying connected with described driving shaft; In described chamber, charge into the gas or the liquid of certain pressure.

7, automatic stepless speed variator according to claim 1 is characterized in that, half of the difference of the internal diameter of described bearing and the external diameter of described driving shaft is the maximum eccentricity amount of described drive plate.

8, automatic stepless speed variator according to claim 7 is characterized in that, the thickness of described eccentric disk on the center line parallel with described guiding groove is the minimum offset of described drive plate.