CN203926641U - Stepless speed changes devices - Google Patents
Stepless speed changes devices Download PDFInfo
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- CN203926641U CN203926641U CN201420215057.9U CN201420215057U CN203926641U CN 203926641 U CN203926641 U CN 203926641U CN 201420215057 U CN201420215057 U CN 201420215057U CN 203926641 U CN203926641 U CN 203926641U
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- gear
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Abstract
The utility model relates to speed change gear field, in particular to stepless speed changes devices.It comprises input shaft, input spiral gear, output shaft and output gear; Input spiral gear comprises cone and input tooth; Input tooth is at cone outer surface along cone axis direction Spiral distribution, and pitch is even; Cone is arranged on input shaft, and coaxially arranges with input shaft; The width of output gear is more than or equal to the pitch of input spiral gear.The utility model stepless speed changes devices only comprises the input spiral gear being arranged on input shaft and is arranged on the output gear on output shaft, simple and reliable for structure, and use gear to realize the transmission of power, the moment of torsion of gear transmission is large, therefore, the moment of torsion of the utility model stepless speed changes devices output is large more than steel-belt type electrodeless variable-speed, can be applied on large discharge capacity go-anywhere vehicle and heavy truck.
Description
Technical field
The utility model relates to speed change gear field, in particular to stepless speed changes devices.
Background technique
Gearbox is an important core constituent element of automobile, and from the trend of development, automatic stepless speed change is ultimate aim.From the present generally gearbox of use, manual transmission and automatic transmission case complex structure, speed change gear is increased to after 7 gears, and in gearbox, component surpass 500, are difficult to the upwards space of increase technically with on cost again.And the most ripe steel-belt type electrodeless variable-speed (CVT) adopts, be friction driving, but not gear engagement is limited by strip material intensity and surface friction drag, moment of torsion reaches 300 Ns of rice and is almost the limit, on large discharge capacity go-anywhere vehicle and heavy truck, cannot apply.
Given this, do not have at present a simple and reliable for structurely, can export high pulling torque, can realize infinite variable speed speed change gear again.
Model utility content
The purpose of this utility model is to provide stepless speed changes devices, to solve the above problems.
A kind of stepless speed changes devices is provided in embodiment of the present utility model, has comprised input shaft, input spiral gear, driving gear set, output shaft and output gear;
Input spiral gear comprises cone and input tooth;
Input tooth is at cone outer surface along cone axis direction Spiral distribution, and pitch is even;
Cone is arranged on input shaft, and coaxially arranges with input shaft;
Driving gear set is arranged between input spiral gear and output gear;
The combined width of driving gear set is more than or equal to the pitch of input spiral gear.
Further, driving gear set comprises driving gear one and driving gear two;
The reference radius of driving gear one is less than the reference radius of driving gear two, the radius ratio of driving gear with they minute the helical tooth radius ratio at the position of meshing identical;
The gradient forming between driving gear one and driving gear two is identical with the circular cone gradient of input spiral gear.
Further, between driving gear one and output gear, by correcting gear train, carry out transmission;
Correct the gear that gear train comprises even number number.
Further, correct gear train and comprise the 3rd gear and the 4th gear;
The 3rd gear and driving gear one engagement, the 4th gear and the engagement of the 3rd gear.
Further, stepless speed changes devices also comprises shift fork;
Shift fork is arranged in driving gear set, for driving driving gear set to move along the axial direction of output gear.
Further, the number of teeth of each circle input tooth of input spiral gear is equal proportion increases successively.
The stepless speed changes devices that the utility model embodiment provides, compares with stepless speed changes devices of the prior art, and it comprises input shaft, output shaft and input spiral gear and output gear.Power is inputted from input shaft, owing to inputting input cone and the transfer input shaft of spiral gear, is dynamically connected, and inputs cone along with input shaft rotates together, meanwhile inputs spiral gear and driving gear set engagement, thereby rotation is passed to output shaft.When needs stepless change, because driving gear can be along its slip on output gear, and input tooth at the external peripheral surface of input cone along its axis spiral multi-turn of arranging, driving gear alternately meshes with the different parts of helical tooth continuously, when driving gear slides on output gear, driving gear remains engagement with input spiral gear, i.e. the rotation of input shaft passes to all the time output shaft in the process of speed change, thereby realizes stepless change.The utility model stepless speed changes devices only comprises the input spiral gear that is arranged on input shaft and is arranged on output gear on output shaft, separately adds driving gear set, simple and reliable for structure, and use gear to realize the transmission of power, the moment of torsion of gear transmission is large, therefore, the moment of torsion of the utility model stepless speed changes devices output is large more than steel-belt type electrodeless variable-speed, can be applied on large discharge capacity go-anywhere vehicle and heavy truck.
Accompanying drawing explanation
Fig. 1 shows the structural representation of the utility model embodiment stepless speed changes devices;
Fig. 2 shows the another kind of structural representation of the utility model embodiment stepless speed changes devices.
In figure, 1: input shaft; 2: cone; 3: input tooth; 4: output shaft; 5: driving gear one; 6: driving gear two; 7: the three gears; 8: the four gears; 9: output gear; 10: shift fork; 11: driving gear set.
Embodiment
Below by specific embodiment, also by reference to the accompanying drawings the utility model is described in further detail.
Accompanying drawing is depicted as a kind of stepless speed changes devices that the present embodiment provides, and comprises input shaft 1, input spiral gear, output shaft 4 and output gear 9;
Input spiral gear comprises cone 2 and input tooth 3;
Input tooth 3 is at cone 2 outer surfaces along cone 2 axial direction Spiral distributions, and pitch is even;
Cone 2 is arranged on input shaft 1, and coaxially arranges with input shaft 1.
Between input spiral gear and output gear 9, pass through driving gear set 11 transmissions;
The combined width of driving gear set 11 is more than or equal to the pitch of input spiral gear.
Driving gear set 11 comprises driving gear 1 and driving gear 26.
The width sum of driving gear 1, driving gear 26 is equal to or greater than a pitch of input helical tooth.
Output gear 9 is arranged on output shaft 4, and coaxially arranges with output shaft 4;
Output gear 9 is parallel with the conical surface of input spiral gear.
The stepless speed changes devices that the utility model embodiment provides, compares with stepless speed changes devices of the prior art, and it comprises input shaft 1, output shaft 4 and input spiral gear and output gear 9.Power is from input shaft 1 input, owing to inputting the input cone 2 of spiral gear, be rotationally connected with input shaft 1, input cone 2 along with input shaft 1 rotates together, meanwhile input spiral gear by driving gear set 11 and output gear 9 engagements, thereby rotation is passed to output shaft 4.
When the transmission of needs constant speed, fork fixed conveyor gear train 11 is a position, and driving gear set 11 is meshed and is delivered to output shaft with a circumference helical tooth of output spiral gear, forms constant speed transmission.
When needs electrodeless variable-speed, fork promotes driving gear set 11 and endwisely slips between input tooth 3 and output gear 9, when driving gear set 11 is slided to the large end of helical tooth, the helical tooth engagement that driving gear set 11 is larger with diameter, increased rotating speed, and the gear width of driving gear 1 and driving gear 26 is equal to or greater than a pitch, no matter driving gear set 11 slides into arbitrary position, helical tooth has a position to be meshed with driving gear set 11 certainly, with this, realizes electrodeless variable-speed.
The utility model stepless speed changes devices only comprises the input spiral gear being arranged on input shaft 1 and is arranged on the output gear 9 on output shaft 4, simple and reliable for structure, and use gear to realize the transmission of power, the moment of torsion of gear transmission is large, therefore, the moment of torsion of the utility model stepless speed changes devices output is large more than steel-belt type electrodeless variable-speed, can be applied on large discharge capacity go-anywhere vehicle and heavy truck.
Further, between driving gear 1 and output gear 9, by correcting gear train, carry out transmission;
Correct the gear that gear train comprises even number number.
Further, correct gear train and comprise the 3rd gear 7 and the 4th gear 8;
The 3rd gear 7 and driving gear one 5 engagements, the 4th gear 8 and the 3rd gear 7 engagements;
The number of teeth of the 4th gear 8 is identical with the number of teeth of driving gear 1.
Because the standard pitch diameter of driving gear 1 is less than the standard pitch diameter of driving gear 26, need between driving gear 1 and output gear 9, arrange that to correct gear train guarantee output gear 9 parallel with the flank of tooth of inputting spiral gear.
The number of correcting gear train is required to be even number, and guarantee is corrected gear train, and to be delivered to the power direction that power direction on output gear 9 and driving gear 26 be delivered on output gear 9 be identical.
The tooth of driving gear 1 and driving gear 26 than the tooth of the input spiral gear with institute mate than identical, the 4th gear 8 is identical with the number of teeth of driving gear 1, and the 3rd gear 7 and the 4th gear 8 are only for by driving gear one 5 constant speed, the equidirectional output gear 9 that is transferred to.
Further, stepless speed changes devices also comprises shift fork 10;
Shift fork 10 is arranged in driving gear set 11, for driving driving gear set 11 to move along the axial direction of output gear 9.
In order to control driving gear set 11, between input spiral gear and output gear 9, slide, in driving gear set 11, be provided with for stirring the shift fork 10 of driving gear set 11.Fork both can play a part driving gear set 11 fixing frames, can also use this shift fork 10 9 groups of output gears can be endwisely slipped, and made to input spiral gear different-diameter and was meshed with driving gear set 11, thereby realize stepless change.
Further, the number of teeth of each circle input tooth 3 of input spiral gear is equal proportion increases successively.
The number of teeth of each circle input tooth 3 of input spiral gear is equal proportion to be increased successively, thereby when with driving gear set 11 engagement, when driving gear set 11 moves, can make the velocity ratio of inputting between spiral gear and output gear 9 change continuously, thereby can reach the object that realizes electrodeless variable-speed.
Driving gear 1, driving gear 26, the 3rd gear 7, the 4th gear 8 combine driving gear set 11, fixing with shift fork 10, but controlled by fork, can slide vertically by the parallel zone between helical tooth and output gear 9.
The cooperative action of the 3rd gear 7 and the 4th gear 8 is for to be delivered in the same way output gear 9 by the rotating speed constant speed of driving gear 1, and the simplest structure is that the 4th gear 8 is identical with driving gear one 5 numbers of teeth, then increases an intermediate gear, i.e. the 3rd gear 7.The gradient forming between driving gear 1 and driving gear 26 is identical with the circular cone gradient of input spiral gear.
A plurality of gears of driving gear set 11 are pressed arranged in step shape, the gradient of ladder is consistent with the tapering of input spiral gear, less gear meshes with the small end of input spiral gear, and larger gear and the large end engagement of inputting spiral gear, mesh continuously to reach with input spiral gear; A plurality of gears are meshed from the output different spirals of spiral gear position in endless relay mode, to realize a complete circumferential engagement.
Each number of teeth of a plurality of gears is different, and concrete gear ratio is: the input spiral gear ratio at the position that gear ratio meshes of adjacent two gears is identical; Such tooth is than being meshed with the input helical tooth of continuous variation better, realize when driving gear 1 and driving gear 26 mesh with the helical tooth of different parts simultaneously simultaneously, output speed all equate, a plurality of gears are collected and are transferred to output shaft 4 by intermediate gear; While only having a gear and spiral gear engagement in driving gear set 11, other is not subject to gear train transmission and keeps synchronizeing rotation with the output gear 9 of helical tooth engagement; 9 groups of engagements of driving gear and output gear.
Driving gear set 11 needs the width that meets combination to be more than or equal to the pitch of inputting spiral gear, thereby can be when departing from 3 engagement of input tooth for one in the time of can making driving gear set 11 mobile on input spiral gear surface, another can shift to an earlier date or synchronous and input tooth 3 engagements, thereby makes whole device can realize stepless change.
That is to say, driving gear set 11 can be slided along between input spiral gear and output gear 9, and to output shaft 4 transmitting torques; The width that driving gear set 11 combines should be not less than a pitch, to guarantee that input spiral gear can be along a circumference of driving gear set 11 engagements, in legend, for seeing simply expressly structure clearly, be only provided with two driving gears, such structure has certain pulsation in a circumference.
For reduce speed ripple as far as possible, increase driving cog number, just can reduce ripple amplitude.In practice, in the situation that structure may be controlled, can driving gear 1 and driving gear 26 be changed narrow, between increase a plurality of gears, the number increasing is more, more can eliminate the speed ripple amplitude of output shaft 4, the combined width that also simultaneously meets a plurality of driving cogs is not less than this condition of pitch; Even can driving gear be set around the circumference multi-angle of whole input helical tooth.When driving gear 1 meshes with input spiral gear, driving gear 26 is also in synchronous rotation, and before driving gear 1 and input tooth 3 depart from or when departing from, the synchronous driving gear rotating 26 just can enter engagement with input tooth 3 smoothly, alternate cycles like this, transmission continuously.
Further, when input tooth 3 is in rotation process, in a circumference because of helical tooth and driving gear engagement, radius is constantly changing.For overcoming this helical tooth change in radius, may cause engagement to depart from or interfere, can overcome by lower several structures:
One, increase the tooth depth of helical tooth and driving gear, both tooth depths are greater than the change in radius amplitude of a spiral circumference as far as possible.
Two, an elastic device is set between helical tooth and driving gear set 11, when the minor radius part of helical tooth meshes with driving gear, elastic device narrows both gaps, when the engagement radius of helical tooth slowly becomes large in rotation, both gaps can be pushed away gradually greatly, this elasticity amplitude makes both keep optimal engagement gap.
Three, set up the number of driving cog, the number of driving cog is more as far as possible, and in the transmission of a circumference, the number of teeth of each driving cog and helical tooth engagement is just fewer, and helical tooth change in radius amplitude is also just very little.
The utility model embodiment's stepless speed changes devices has following characteristics:
1, can be as friction type stepless speed change device during speed change continuously smooth speed change, the transmission of speed-change process medium power does not have clutch action, improves transmission efficiency.
2, transmission torque can reach the high pulling torque that gear is the same.
3, can input the taper ratio of spiral gear or increase spiral ring by increase and can increase considerably gear ratio.
4, simple and reliable for structure, cost significantly reduces.
The stepless speed changes devices that the utility model embodiment provides, compares with stepless speed changes devices of the prior art, and it comprises input shaft 1, output shaft 4 and input spiral gear and output gear 9.Power is from input shaft 1 input, owing to inputting the input cone 2 of spiral gear, be rotationally connected with input shaft 1, input cone 2 along with input shaft 1 rotates together, meanwhile input spiral gear and driving gear set 11 engagements, thereby rotation is passed to output shaft 4.When needs stepless change, because output gear 9 can be along its slip on output shaft 4, and input tooth 3 at the external peripheral surface of input cone 2 along its axis spiral multi-turn of arranging, driving gear set 11 alternately meshes with the different parts of helical tooth continuously, output gear 9 remains engagement with input spiral gear, the rotation that is input shaft 1 passes to all the time output shaft 4 in the process of speed change, thereby realizes stepless change.The utility model stepless speed changes devices only comprises the input spiral gear being arranged on input shaft 1 and is arranged on output gear 9 and the driving gear set 11 on output shaft 4, simple and reliable for structure, and use gear to realize the transmission of power, the moment of torsion of gear transmission is large, therefore, the moment of torsion of the utility model stepless speed changes devices output is large more than steel-belt type electrodeless variable-speed, can be applied on large discharge capacity go-anywhere vehicle and heavy truck.
The foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, for a person skilled in the art, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.
Claims (6)
1. a stepless speed changes devices, is characterized in that, comprises input shaft, input spiral gear, driving gear set, output shaft and output gear;
Described input spiral gear comprises cone and input tooth;
Described input tooth is at described cone outer surface along described cone axis direction Spiral distribution, and pitch is even;
Described cone is arranged on described input shaft, and coaxially arranges with described input shaft;
Described driving gear set is arranged between described input spiral gear and described output gear;
The combined width of described driving gear set is more than or equal to the pitch of described input spiral gear.
2. stepless speed changes devices according to claim 1, is characterized in that, described driving gear set comprises driving gear one and driving gear two;
The reference radius of described driving gear one is less than the reference radius of described driving gear two, and the radius ratio of driving gear is identical with the helical tooth radius ratio at they difference positions of meshing;
The gradient forming between described driving gear one and described driving gear two is identical with the circular cone gradient of described input spiral gear.
3. stepless speed changes devices according to claim 2, is characterized in that, between described driving gear one and described output gear, by correcting gear train, carries out transmission;
Described rectification gear train comprises the gear of even number number.
4. stepless speed changes devices according to claim 3, is characterized in that, described rectification gear train comprises the 3rd gear and the 4th gear;
Described the 3rd gear and one engagement of described driving gear, described the 4th gear and described the 3rd gear engagement.
5. stepless speed changes devices according to claim 4, is characterized in that, also comprises shift fork;
Described shift fork is arranged in described driving gear set, for driving described driving gear set to move along the axial direction of described output gear.
6. stepless speed changes devices according to claim 1, is characterized in that, the number of teeth that each of described input spiral gear is enclosed described input tooth is equal proportion to be increased successively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420215057.9U CN203926641U (en) | 2014-04-10 | 2014-04-29 | Stepless speed changes devices |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420171811 | 2014-04-10 | ||
| CN201420171811.3 | 2014-04-10 | ||
| CN201420215057.9U CN203926641U (en) | 2014-04-10 | 2014-04-29 | Stepless speed changes devices |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203926641U true CN203926641U (en) | 2014-11-05 |
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ID=51822454
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420215057.9U Expired - Fee Related CN203926641U (en) | 2014-04-10 | 2014-04-29 | Stepless speed changes devices |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203926641U (en) |
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2014
- 2014-04-29 CN CN201420215057.9U patent/CN203926641U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141105 Termination date: 20160429 |