CN104976289A - Stepless speed change device - Google Patents
Stepless speed change device Download PDFInfo
- Publication number
- CN104976289A CN104976289A CN201410177491.7A CN201410177491A CN104976289A CN 104976289 A CN104976289 A CN 104976289A CN 201410177491 A CN201410177491 A CN 201410177491A CN 104976289 A CN104976289 A CN 104976289A
- Authority
- CN
- China
- Prior art keywords
- gear
- driving gear
- input
- stepless speed
- output
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H3/00—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion
- F16H3/02—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion
- F16H3/20—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially using gears that can be moved out of gear
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/02—Gearboxes; Mounting gearing therein
- F16H57/023—Mounting or installation of gears or shafts in the gearboxes, e.g. methods or means for assembly
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H2200/00—Transmissions for multiple ratios
Abstract
The invention relates to the field of speed change devices, in particular to a stepless speed change device. The stepless speed change device comprises an input shaft, an input spiral gear, an output shaft and an output gear, wherein the input spiral gear comprises a cone and input teeth; the input teeth are spirally distributed on the external surface of the cone along the axial direction of the cone; the screw pitches are uniform; the cone is arranged on the input shaft coaxially; and the width of the output gear is greater than or equal to the screw pitch of the input spiral gear. The stepless speed change device only comprises the input spiral gear arranged on the input shaft and the output gear arranged on the output shaft, so that the stepless speed change device is simple and reliable in structure. In addition, power transmission is realized by using the gears, and a torque transmitted by the gears is high, so that the torque output by the stepless speed change device is greater than that output by a steel band type stepless speed change device, and the stepless speed change device can be applied to a large displacement off-road vehicle and a heavy truck.
Description
Technical field
The present invention 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 gearbox generally used now, manual transmission and automatic transmission case complex structure, after speed change gear is increased to 7 gears, in gearbox, component are more than 500, are difficult to the space that upwards increases again technically with on cost.And steel-belt type electrodeless variable-speed (CVT) the most ripe adopts is friction driving, but not gears meshing, limit by strip material intensity and surface friction drag, moment of torsion reaches 300 Ns of rice and is almost the limit, and huge discharge go-anywhere vehicle and heavy truck cannot be applied.
Given this, do not have a simple and reliable for structure at present, can high pulling torque be exported, infinite variable speed speed change gear can be realized again.
Summary of the invention
The object of the present invention is to provide stepless speed changes devices, to solve the above problems.
Provide a kind of stepless speed changes devices in an embodiment of the present invention, comprise input shaft, input spiral gear, driving gear set, output shaft and output gear;
Input spiral gear comprises cone and input tooth;
Input tooth at conical exterior 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 and they point to engage the helical tooth radius ratio at position identical;
The gradient formed between driving gear one with driving gear two is identical with the conical taper of input spiral gear.
Further, transmission is carried out by correcting gear train between driving gear one and output gear;
Correct the gear that gear train comprises even number number.
Further, correct gear train and comprise the 3rd gear and the 4th gear;
3rd gear engages with driving gear one, the 4th gear and the 3rd gears meshing.
Further, stepless speed changes devices also comprises shift fork;
Shift fork is arranged in driving gear set, moves along the axial direction of output gear for driving driving gear set.
Further, the number of teeth inputting each circle input tooth of spiral gear is that equal proportion increases successively.
The stepless speed changes devices that the embodiment of the present invention provides, compared with stepless speed changes devices of the prior art, it comprises input shaft, output shaft and input spiral gear and output gear.Power inputs from input shaft, because the input cone and input shaft inputting spiral gear is rotationally connected, then inputs cone and rotates together along with input shaft, meanwhile input spiral gear and engage with driving gear set, thus rotation is passed to output shaft.When needs stepless change, because driving gear can slide along it on output gear, and input the external peripheral surface of tooth at input cone along its axis helical arrangement multi-turn, driving gear alternately engages with the different parts of helical tooth continuously, when then driving gear slides on output gear, driving gear remains with input spiral gear and engages, and namely the rotation of input shaft passes to output shaft all the time in the process of speed change, thus realizes stepless change.Stepless speed changes devices of the present invention only comprises the input spiral gear be arranged on input shaft and the output gear be arranged 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 that stepless speed changes devices of the present invention exports is large more than steel-belt type electrodeless variable-speed, can be applied on huge discharge go-anywhere vehicle and heavy truck.
Accompanying drawing explanation
Fig. 1 shows the structural representation of embodiment of the present invention stepless speed changes devices;
Fig. 2 shows the another kind of structural representation of embodiment of the present invention 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
Also by reference to the accompanying drawings the present invention is described in further detail below by specific embodiment.
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 at cone 2 outer surface along cone 2 axial direction Spiral distribution, and pitch is even;
Cone 2 is arranged on input shaft 1, and coaxially arranges with input shaft 1.
By driving gear set 11 transmission between input spiral gear and output gear 9;
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 embodiment of the present invention provides, compared with stepless speed changes devices of the prior art, it comprises input shaft 1, output shaft 4 and input spiral gear and output gear 9.Power inputs from input shaft 1, because the input cone 2 inputting spiral gear is rotationally connected with input shaft 1, then input cone 2 to rotate together along with input shaft 1, meanwhile input spiral gear and engaged with output gear 9 by driving gear set 11, thus 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 with the peripheral helical tooth exporting spiral gear and is delivered to output shaft, forms constant speed transmission.
When needs electrodeless variable-speed, fork promotes driving gear set 11 and slides axially 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 that driving gear set 11 is larger with diameter engages, then increase 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, realizes electrodeless variable-speed with this.
Stepless speed changes devices of the present invention only comprises the input spiral gear be arranged on input shaft 1 and the output gear 9 be arranged 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 that stepless speed changes devices of the present invention exports is large more than steel-belt type electrodeless variable-speed, can be applied on huge discharge go-anywhere vehicle and heavy truck.
Further, transmission is carried out by correcting gear train between driving gear 1 and output gear 9;
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;
3rd gear 7 engages with driving gear 1, and the 4th gear 8 engages with the 3rd gear 7;
The number of teeth of the 4th gear 8 is identical with the number of teeth of driving gear 1.
Standard pitch diameter due to driving gear 1 is less than the standard pitch diameter of driving gear 26, need to arrange between driving gear 1 with output gear 9 correct gear train guarantee output gear 9 with input spiral gear the flank of tooth parallel.
Correct the number of gear train and be required to be even number, guarantee is corrected gear train and is delivered to power direction on output gear 9 and driving gear 26 power direction be delivered on output gear 9 is identical.
The tooth of driving gear 1 and driving gear 26 than the tooth of the input spiral gear with institute mate than identical, 4th gear 8 is identical with the number of teeth of driving gear 1, the 3rd gear 7 and the 4th gear 8 only for by driving gear 1 constant speed, be equidirectionally transferred to output gear 9.
Further, stepless speed changes devices also comprises shift fork 10;
Shift fork 10 is arranged in driving gear set 11, moves along the axial direction of output gear 9 for driving driving gear set 11.
Slide between input spiral gear and output gear 9 to control driving gear set 11, driving gear set 11 is provided with the shift fork 10 for stirring driving gear set 11.Fork both can play a part driving gear set 11 fixing frame, this shift fork 10 can also be used output gear 9 groups can be slid axially, input spiral gear different-diameter is meshed with driving gear set 11, thus realizes stepless change.
Further, the number of teeth inputting each circle input tooth 3 of spiral gear is that equal proportion increases successively.
The number of teeth of each circle input tooth 3 of input spiral gear is that equal proportion increases successively, thus when engaging with driving gear set 11, when driving gear set 11 moves, the velocity ratio consecutive variations between input spiral gear and output gear 9 can be made, thus the object realizing electrodeless variable-speed can be reached.
Driving gear 1, driving gear 26, the 3rd gear 7, the 4th gear 8 combine driving gear set 11, fix with shift fork 10, but control to slide axially by the parallel zone between helical tooth and output gear 9 by fork.
The cooperative action of the 3rd gear 7 and the 4th gear 8 is that the rotating speed constant speed of driving gear 1 is delivered to output gear 9 in the same way, and the simplest structure is that the 4th gear 8 is identical with driving gear 1 number of teeth, then increases an intermediate gear, i.e. the 3rd gear 7.The gradient formed between driving gear 1 with driving gear 26 is identical with the conical taper of input spiral gear.
Arranged in step shape pressed by multiple gears of driving gear set 11, the gradient of ladder is consistent with the tapering of input spiral gear, less gear engages with the small end of input spiral gear, and larger gear engages with the large end of input spiral gear, engages continuously with input spiral gear to reach; Multiple gear is meshed from the output different spiral position of spiral gear in endless relay mode, to realize a complete circumferential engagement.
Each number of teeth of multiple gear is different, the gear ratio that concrete gear ratio is: adjacent two gears to engage the input spiral gear ratio at position identical; Such tooth is than being meshed with the input helical tooth constantly changed better, realize when driving gear 1 and driving gear 26 engage with the helical tooth of different parts simultaneously simultaneously, the speed exported is all equal, and multiple gear is collected by intermediate gear and is transferred to output shaft 4; When only having a gear to engage with spiral gear in driving gear set 11, the output gear 9 that other does not engage with helical tooth keeps synchronous axial system by gear train transmission; Driving gear engages with output gear 9 groups.
The width of driving gear set 11 demand fulfillment combination is more than or equal to the pitch of input spiral gear, thus can enable driving gear set 11 when inputting spiral gear surface and being mobile one depart from input tooth 3 engage time, another can shift to an earlier date or synchronously engage with input tooth 3, thus enables whole device realize stepless change.
That is, driving gear set 11 can be slided along between input spiral gear and output gear 9, and to output shaft 4 transmitting torque; The width that driving gear set 11 combines should be not less than a pitch, to ensure that input spiral gear can engage a circumference along driving gear set 11, for simply to see structure expressly clearly in legend, be only provided with two driving gears, such structure has certain pulsation in a circumference.
For reducing speed ripple as far as possible, increase driving cog number, just can decrease ripple amplitude.In practice, when structure may be controlled, can driving gear 1 and driving gear 26 be changed narrow, between increase multiple gear, the number increased is more, more can eliminate the speed ripple amplitude of output shaft 4, the combined width also simultaneously meeting multiple driving cog is not less than this condition of pitch; Even driving gear can be set around the circumference multi-angle of whole input helical tooth.When driving gear 1 engages with input spiral gear, driving gear 26 also at synchronous axial system, when driving gear 1 and input tooth 3 depart from front or while departing from, the driving gear 26 of synchronous axial system just can smoothly with input tooth 3 and enter and engage, alternate cycles like this, continuous transmission.
Further, when input tooth 3 is in rotation process, because of in the circumference that helical tooth engages with driving gear, radius is constantly changing.Engagement may be caused to depart from for overcoming this helical tooth change in radius or interfere, can overcome by lower several structure:
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 portion of small radius of helical tooth engages with driving gear, both gaps narrow by elastic device, 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 that each driving cog engages with helical tooth is fewer, then helical tooth change in radius amplitude is also just very little.
The stepless speed changes devices of the embodiment of the present invention has following characteristics:
1, during speed change can as friction type stepless speed change device continuously smooth speed change, the transmission of speed-change process medium power does not have clutch action, improve transmission efficiency.
2, transmission torque can reach the same high pulling torque of gear.
3, gear ratio can be increased considerably by the taper ratio or increase spiral ring increasing input spiral gear.
4, simple and reliable for structure, cost significantly reduces.
The stepless speed changes devices that the embodiment of the present invention provides, compared with stepless speed changes devices of the prior art, it comprises input shaft 1, output shaft 4 and input spiral gear and output gear 9.Power inputs from input shaft 1, because the input cone 2 inputting spiral gear is rotationally connected with input shaft 1, then input cone 2 to rotate together along with input shaft 1, meanwhile input spiral gear and engage with driving gear set 11, thus rotation is passed to output shaft 4.When needs stepless change, because output gear 9 can slide along it on output shaft 4, and input the external peripheral surface of tooth 3 at input cone 2 along its axis helical arrangement multi-turn, driving gear set 11 alternately engages with the different parts of helical tooth continuously, output gear 9 remains with input spiral gear and engages, namely the rotation of input shaft 1 passes to output shaft 4 all the time in the process of speed change, thus realizes stepless change.Stepless speed changes devices of the present invention only comprises the output gear 9 and driving gear set 11 that are arranged on input spiral gear on input shaft 1 and be arranged 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 that stepless speed changes devices of the present invention exports is large more than steel-belt type electrodeless variable-speed, can be applied on huge discharge go-anywhere vehicle and heavy truck.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
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 conical exterior 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, the radius ratio of driving gear and they point to engage the helical tooth radius ratio at position identical;
The conical taper of the gradient formed between described driving gear one with described driving gear two and described input spiral gear is identical.
3. stepless speed changes devices according to claim 2, is characterized in that, carries out transmission between described driving gear one and described output gear by correcting gear train;
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 3rd gear engages with described driving gear one, described 4th gear and described 3rd gears meshing.
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, moves along the axial direction of described output gear for driving described driving gear set.
6. stepless speed changes devices according to claim 1, is characterized in that, the number of teeth that each of described input spiral gear encloses described input tooth is that equal proportion increases successively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410177491.7A CN104976289A (en) | 2014-04-10 | 2014-04-29 | Stepless speed change device |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2014101421277 | 2014-04-10 | ||
| CN201410142127 | 2014-04-10 | ||
| CN201410177491.7A CN104976289A (en) | 2014-04-10 | 2014-04-29 | Stepless speed change device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104976289A true CN104976289A (en) | 2015-10-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410177491.7A Pending CN104976289A (en) | 2014-04-10 | 2014-04-29 | Stepless speed change device |
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| CN (1) | CN104976289A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108253098A (en) * | 2018-02-27 | 2018-07-06 | 倍能科技（广州）有限公司 | Passive type variable gears speed change gear |
| CN108253099A (en) * | 2018-02-27 | 2018-07-06 | 倍能科技（广州）有限公司 | Active variable gears speed change gear |
| CN111680371A (en) * | 2020-05-29 | 2020-09-18 | 武汉理工大学 | Tooth surface modification method for gear ratio rack of steering gear |
| CN111677821A (en) * | 2020-06-22 | 2020-09-18 | 徐宇 | Gear drive stepless speed changer |
-
2014
- 2014-04-29 CN CN201410177491.7A patent/CN104976289A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108253098A (en) * | 2018-02-27 | 2018-07-06 | 倍能科技（广州）有限公司 | Passive type variable gears speed change gear |
| CN108253099A (en) * | 2018-02-27 | 2018-07-06 | 倍能科技（广州）有限公司 | Active variable gears speed change gear |
| CN111680371A (en) * | 2020-05-29 | 2020-09-18 | 武汉理工大学 | Tooth surface modification method for gear ratio rack of steering gear |
| CN111680371B (en) * | 2020-05-29 | 2024-02-13 | 武汉理工大学 | Tooth surface shaping method of steering gear speed ratio rack |
| CN111677821A (en) * | 2020-06-22 | 2020-09-18 | 徐宇 | Gear drive stepless speed changer |
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Legal Events
| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20151014 |
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| WD01 | Invention patent application deemed withdrawn after publication |