CN102128241A - CVT (Continuously Variable Transmission) gear box capable of automatically eliminating steel belt shift - Google Patents
CVT (Continuously Variable Transmission) gear box capable of automatically eliminating steel belt shift Download PDFInfo
- Publication number
- CN102128241A CN102128241A CN2010106089345A CN201010608934A CN102128241A CN 102128241 A CN102128241 A CN 102128241A CN 2010106089345 A CN2010106089345 A CN 2010106089345A CN 201010608934 A CN201010608934 A CN 201010608934A CN 102128241 A CN102128241 A CN 102128241A
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- Prior art keywords
- steel band
- bearing
- steel belt
- cvt
- band side
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 78
- 239000010959 steel Substances 0.000 title claims abstract description 78
- 230000005540 biological transmission Effects 0.000 title abstract description 12
- 230000007246 mechanism Effects 0.000 claims abstract description 11
- 230000008030 elimination Effects 0.000 claims description 14
- 238000003379 elimination reaction Methods 0.000 claims description 14
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 abstract 5
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 230000008859 change Effects 0.000 description 4
- 239000000446 fuel Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
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Abstract
The invention discloses a CVT (Continuously Variable Transmission) gear box capable of automatically eliminating steel belt shift, which belongs to the technical field of transmission systems. The invention adopts a technical scheme that the CVT gear box capable of automatically eliminating steel belt shift comprises a bearing pedestal and a belt wheel input system arranged in the bearing pedestal; the belt wheel input system comprises a drive shaft, a belt wheel shaft and a steel belt, wherein an axial relocation mechanism is arranged between the bearing pedestal and the belt wheel input system, and the axial relocation mechanism can enable the belt wheel input system to axially move in the bearing pedestal toward a direction for eliminating the shift of the steel belt when the steel belt shifts. The technical scheme provided by the embodiment of the invention has the beneficial effects that the axial relocation mechanism can ensure that the belt wheel input system axially moves in the bearing pedestal toward a direction for eliminating the shift of the steel belt when the steel belt shifts, so that the shift of the steel belt is radically eliminated, the single side wear phenomenon of the steel belt resulting from the shift of the steel belt is eliminated, the service life of the steel belt is prolonged, and the transmission efficiency of the steel belt is improved.
Description
Technical field
The present invention relates to the speed control system of car technical field, particularly a kind of CVT gearbox of automatic elimination steel band side-play amount.
Background technique
Propulsion steel strip type CVT is through in recent years development, made significant headway, because its original driving comfortability, fuel economy and low emission performance, on car, be widely used in recent years, in market, Asia, the vehicle speedup of carrying the CVT automatic transmission case rapidly has traditional AT automatic transmission case trend of replacement especially.
All CVT gear belt wheel cones of friction have all adopted the straight edge line structure on the current market, and the input output pulley system adopted axially locating, because the structural characteristics of straight edge line conical surface belt wheel itself, make steel band between two groups of belt wheels, inevitably can produce skew, distortion during speed change, make steel band produce extra stress, have a strong impact on the steel band life-span; In addition,, and, greatly reduce friction factor, have a strong impact on torque capacity and steel band life-span, so practicability is little because bent bus contacts with steel band to the some contact even adopt bent bus also can only reduce side-play amount limitedly.In order to guarantee that steel band can satisfy the integeral vehicle life requirement, steel band has strict restriction to skew, all CVT gearboxes all are to guarantee the steel band side-play amount by limiting the maximum and minimum engagement radius of steel band now, make the ratio coverage of CVT gearbox be limited in about 6, compare 7 speed, the 8 fast AT (ratio coverage is between 7-8) that occur on the market, the car load of equipment CVT gearbox there is no advantage on fuel consume; And adopt above-mentioned measure can only guarantee that also the steel band side-play amount is controlled in the scope of setting, can not fundamentally eliminate the steel band skew, and, influence the life-span and the transmission efficiency of steel band because the existence of skew in service makes steel band two friction sides have one-sided wear phenomenon.
In realizing process of the present invention, the inventor finds that there is following problem at least in prior art: existing C VT gearbox can't fundamentally be eliminated the steel band skew, and because steel band is offset the one-sided wearing and tearing of steel band that produce, influences the life-span and the transmission efficiency of steel band.
Summary of the invention
Be offset in order fundamentally to eliminate steel band, and eliminate because steel band is offset the one-sided wearing and tearing of steel band that produce, the life-span and the transmission efficiency of raising steel band, the embodiment of the invention provides a kind of CVT gearbox of automatic elimination steel band side-play amount.
Described technological scheme is as follows:
A kind of CVT gearbox of automatic elimination steel band side-play amount, comprise bearing support and be arranged on the interior belt wheel input system of bearing support, the belt wheel input system comprises live axle, belt shaft and steel band, wherein, be provided with axial float mechanism between described bearing support and the described belt wheel input system, described axial float mechanism can move axially described belt wheel input system when skew takes place described steel band to the direction of eliminating described steel band side-play amount in described bearing support.
In order better to realize the foregoing invention purpose, the embodiment of the invention also provides following technological scheme: described axial float mechanism is the play bearing with axial internal clearance.
In order better to realize the foregoing invention purpose, the embodiment of the invention also provides following technological scheme: described play bearing is roller bearing, deep groove ball bearing, selfaligning ball bearing or selfaligning roller bearing.
In order better to realize the foregoing invention purpose, the embodiment of the invention also provides following technological scheme: the axial internal clearance of described play bearing is 1-2mm.
In order better to realize the foregoing invention purpose, the embodiment of the invention also provides following technological scheme: the bearing inner race of described axial float bearing is fixedlyed connected with described belt shaft, and bearing outer ring is fixedlyed connected with described bearing support.
In order better to realize the foregoing invention purpose, the embodiment of the invention also provides following technological scheme: the ball key by axially-aligned between described live axle and the described belt shaft connects.
The beneficial effect that the technological scheme that the embodiment of the invention provides is brought is: be provided with axial float mechanism between bearing support and belt wheel input system, axial float mechanism can guarantee when skew takes place steel band, the belt wheel input system is moved axially to the direction of eliminating the steel band side-play amount in bearing support, thereby fundamentally eliminate the skew of steel band, and eliminate because steel band is offset the one-sided wear phenomenon of steel band that produces, improved the life-span and the transmission efficiency of steel band.
Description of drawings
Fig. 1 is the structural representation of the embodiment of the invention.
In the accompanying drawing, the component list of each label representative is as follows:
1, roller bearing A; 2, belt shaft; 3, steel band; 4, roller bearing B; 5, live axle; 6, ball key; 7, bearing support.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, embodiment of the present invention is described further in detail below in conjunction with accompanying drawing.
As shown in Figure 1, its technological scheme is:
A kind of CVT gearbox of automatic elimination steel band side-play amount, comprise bearing support 7 and the belt wheel input system that is arranged in the bearing support 7, the belt wheel input system comprises live axle 5, belt shaft 2 and steel band 3, wherein, be respectively arranged with roller bearing A1 and roller bearing B4 between the two ends of the belt shaft 2 of bearing support 7 and belt wheel input system.
The axial internal clearance of roller bearing A1 and roller bearing B4 is 1-2mm.
The bearing inner race of roller bearing A1 is fixedlyed connected with belt shaft 2, and bearing outer ring is fixedlyed connected with bearing support 7; The bearing inner race of roller bearing B4 is fixedlyed connected with belt shaft 2, and bearing outer ring is fixedlyed connected with bearing support 7.
Ball key 6 by axially-aligned between live axle 5 and the belt shaft 2 connects.
The CVT gearbox of the embodiment of the invention, when skew takes place in steel band 3, the axial force that skew is produced can move to the direction that reduces steel band 3 side-play amounts by rotating band wheel shaft 2, mobile can the drive of belt shaft 2 comprises that the whole belt wheel input system of steel band 3 moves to the direction that reduces steel band 3 side-play amounts, thereby reach the effect of fundamentally eliminating steel band 3 skews in the speed change, thereby realize enlarging the effect of CVT slewing range, promote the fuel economy of equipment CVT car load; Simultaneously, also eliminate the one-sided wear phenomenon that exists in steel band 3 bi-side that cause owing to steel band 3 skews, promoted the working life and the CVT gearbox transmission efficiency of CVT steel band 3; In addition, the embodiment of the invention not only can fundamentally be eliminated the influence of steel band 3 skews, also eliminated simultaneously 3 pairs of skews of steel band quantitative limitation, make the ratio coverage of belt CVT obtain enlarging, ratio coverage can be promoted to 8-10 (as the redesign belt wheel under the prerequisite that does not change existing CVT gearbox designs layout size, select suitable propulsion steel strip size, ratio coverage can also be extended to 10-16), promote the fuel economy and the emission control of equipment CVT gearbox car load.
Adopt the ball key of arranging according to the axial direction of belt shaft 26 to cooperate between belt shaft 2 and the live axle 5 and realize transmission of power, to reduce the axially movable resistance of pulley system, realize as long as steel band 3 produces small skew, the axial force that skew is produced just can move to the direction that reduces steel band 3 side-play amounts by driving pulley 2, reaches the effect of eliminating the steel band skew in the speed change.
The above only is preferred embodiment of the present invention, and is in order to restriction the present invention, within the spirit and principles in the present invention not all, any modification of being done, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. CVT gearbox of automatically eliminating the steel band side-play amount, comprise bearing support and be arranged on the interior belt wheel input system of bearing support, the belt wheel input system comprises live axle, belt shaft and steel band, it is characterized in that, be provided with axial float mechanism between described bearing support and the described belt wheel input system, described axial float mechanism can move axially described belt wheel input system when skew takes place described steel band to the direction of eliminating described steel band side-play amount in described bearing support.
2. the CVT gearbox of automatic elimination steel band side-play amount according to claim 1 is characterized in that, described axial float mechanism is the play bearing with axial internal clearance.
3. the CVT gearbox of automatic elimination steel band side-play amount according to claim 2 is characterized in that, described play bearing is roller bearing, deep groove ball bearing, selfaligning ball bearing or selfaligning roller bearing.
4. according to the CVT gearbox of claim 2 or 3 described automatic elimination steel band side-play amounts, it is characterized in that the axial internal clearance of described play bearing is 1-2mm.
5. according to the CVT gearbox of claim 2 or 3 described automatic elimination steel band side-play amounts, it is characterized in that the bearing inner race of described axial float bearing is fixedlyed connected with described belt shaft, bearing outer ring is fixedlyed connected with described bearing support.
6. the CVT gearbox of automatic elimination steel band side-play amount according to claim 4 is characterized in that, the bearing inner race of described axial float bearing is fixedlyed connected with described belt shaft, and bearing outer ring is fixedlyed connected with described bearing support.
7. according to the CVT gearbox of the arbitrary described automatic elimination steel band side-play amount of claim 1-3, it is characterized in that the ball key by axially-aligned between described live axle and the described belt shaft connects.
8. the CVT gearbox of automatic elimination steel band side-play amount according to claim 4 is characterized in that, the ball key by axially-aligned between described live axle and the described belt shaft connects.
9. the CVT gearbox of automatic elimination steel band side-play amount according to claim 5 is characterized in that, the ball key by axially-aligned between described live axle and the described belt shaft connects.
10. the CVT gearbox of automatic elimination steel band side-play amount according to claim 6 is characterized in that, the ball key by axially-aligned between described live axle and the described belt shaft connects.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010106089345A CN102128241A (en) | 2010-12-20 | 2010-12-20 | CVT (Continuously Variable Transmission) gear box capable of automatically eliminating steel belt shift |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010106089345A CN102128241A (en) | 2010-12-20 | 2010-12-20 | CVT (Continuously Variable Transmission) gear box capable of automatically eliminating steel belt shift |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102128241A true CN102128241A (en) | 2011-07-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010106089345A Pending CN102128241A (en) | 2010-12-20 | 2010-12-20 | CVT (Continuously Variable Transmission) gear box capable of automatically eliminating steel belt shift |
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|---|---|
| CN (1) | CN102128241A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2043294U (en) * | 1988-04-09 | 1989-08-23 | 程乃士 | Metal serpentine strap and serpentine strap stepless speed change device |
| US20020142870A1 (en) * | 2001-03-30 | 2002-10-03 | Honda Giken Kogyo Kabushiki Kaisha | Belt-type continuously variable transmission |
| JP2004183765A (en) * | 2002-12-03 | 2004-07-02 | Nsk Ltd | Rolling bearing for belt-type continuously variable transmission |
| JP2009222177A (en) * | 2008-03-18 | 2009-10-01 | Daihatsu Motor Co Ltd | Assembling structure of belt type continuously variable transmission |
-
2010
- 2010-12-20 CN CN2010106089345A patent/CN102128241A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2043294U (en) * | 1988-04-09 | 1989-08-23 | 程乃士 | Metal serpentine strap and serpentine strap stepless speed change device |
| US20020142870A1 (en) * | 2001-03-30 | 2002-10-03 | Honda Giken Kogyo Kabushiki Kaisha | Belt-type continuously variable transmission |
| JP2004183765A (en) * | 2002-12-03 | 2004-07-02 | Nsk Ltd | Rolling bearing for belt-type continuously variable transmission |
| JP2009222177A (en) * | 2008-03-18 | 2009-10-01 | Daihatsu Motor Co Ltd | Assembling structure of belt type continuously variable transmission |
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Application publication date: 20110720 |