CN101463886A - Continuously variable transmission - Google Patents
Continuously variable transmission Download PDFInfo
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- CN101463886A CN101463886A CNA2009101160613A CN200910116061A CN101463886A CN 101463886 A CN101463886 A CN 101463886A CN A2009101160613 A CNA2009101160613 A CN A2009101160613A CN 200910116061 A CN200910116061 A CN 200910116061A CN 101463886 A CN101463886 A CN 101463886A
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Abstract
The invention relates to a speed governing mechanism of a variable speed case, comprising an input tape axle mechanism, an output tape axle mechanism and a transmission steel strip arranged between the input tape axle mechanism and the output tape axle mechanism; the output tape axle mechanism and a torque output shaft transmit torque in a fixed circumferential direction; the output tape axle mechanism comprises an output tape axle and a fixed cone plate and a movable cone plate which mutually interwork with adjustable axial direction spacing; the movable cone plate is provided with at least one spring which exerts pressure to maintain the working spacing with the fixed cone plate. In the invention, a mechanical spring is used for replacing a hydraulic pressure mechanism of the prior art to provide clamping pressure to the cone plates and steel strips, thus improving transmission efficiency. The invention reduces part of power provided by the engine due to power consumption of a hydraulic mechanism, dwindles power loss generated by much too high clamping pressure, thus improving efficiency of the whole transmission mechanism.
Description
Technical field
The present invention relates to the gear in the power train--stepless speed variator, specifically is exactly the cramping mechanism of stepless speed variator.
Background technique
CVT is English Continuousl Variable Transmission abbreviation, is called for short stepless change transmission or continuous variable speed transmission, has adopted the speed changer of this mechanism to be called stepless speed variator or gearbox, is called for short the CVT speed changer.This CVT speed changer mainly comprises two conical disc and a steel band chain composition, and conical disc is exactly that two conical discs are combined the drive plate that forms a band V-type groove, realizes the adjusting of velocity ratio by the change of conical disc axial spacing.Propulsion steel strip type CVT is through in recent years development, made significant headway, and application of on compact car, succeeding and popularization, but because the restriction of the qualification of intermetallic friction factor and band resistance to tension, make it in the high pulling torque transmission, never obtain breakthrough, make CVT practical oil consumption and cost advantage also not obvious.
Speed regulating mechanism of the prior art has adopted hydraulic mechanism to realize pressurization and speed governing, because pressurization is to provide long-term pressure by hydraulic pressure to Moving plate, make its efficient very low, according to the power consumpiton of analyzing nearly about 10% motor on this hydraulic mechanism, and realize controlling very complicated to hydraulic pressure, the manufacture cost height makes CVT practical oil consumption and cost advantage also not obvious.And it is hydraulic system is very high to the requirement of part accuracy of manufacturing, and affected by environment bigger.
Summary of the invention
Purpose of the present invention just provides a kind of stepless speed variator, adopts machinery type to exert pressure to conical disc and keeps the normal and reliability of its transmission, reduces the power consumption of motor.
For achieving the above object, the present invention has adopted following technological scheme: a kind of stepless speed variator, between input tape axle mechanism and the output pulley axis mechanism mechanism transmission steel band is set, the circumferential fixed delivery moment of torsion of output pulley axis mechanism and torque output shaft, described input tape axle mechanism comprises the input tape wheel shaft and goes up adjustable fixed cone dish and the movable awl dish of the axial spacing that cooperatively interacts that is provided with, the output pulley axis mechanism comprises fixed cone dish and the sheathed activity awl dish of torque output shaft on the torque output shaft, movable awl dish and torque output shaft move axially, circumferentially fixedly connected, it is characterized in that: have at least one to provide clamping pressure to keep work cell distance between itself and fixed cone dish in activity awl dish on described input tape axle mechanism and the output pulley axis mechanism and the movable awl dish by spring.
The present invention adopts mechanical spring to replace hydraulic mechanism of the prior art to provide clamping pressure to awl dish and steel band, can not only effectively improve transmission efficiency, thereby the working life that the load that can also effectively reduce driving belt improves band, and thereby spring clip pressure has the generation that good in real time correspondence has well been avoided the drive belt slip phenomenon, improved transmission efficiency and working life effectively.
As shown from the above technical solution, the present invention adopts mechanical spring to replace hydraulic mechanism of the prior art that gear is exerted pressure, can adopt mechanical spring to offer Moving plate pressure on concrete the enforcement and make its proper functioning, adopt above-mentioned machinery type pressurization, this two spring can be realized the balance of pressure at both sides, the part power that provides owing to the hydraulic mechanism consumption of engine has been provided in the present invention, has improved the efficient of motor.
Description of drawings
Fig. 1 is a driving mechanism schematic diagram of the present invention;
Fig. 2 is a structural representation of the present invention;
Fig. 3 is the local enlarged diagram among Fig. 1;
Fig. 4 is the A-A sectional view among Fig. 2;
Fig. 5,6 provides the spring characteristic curve figure of elastic force to activity awl dish on input tape axle mechanism and the output pulley axis mechanism.
Embodiment
Referring to Fig. 1, stepless speed variator comprise be provided with between input tape axle mechanism 20 and output pulley axis mechanism 30 mechanisms transmission steel band 40, output pulley axis mechanism 30 and torque output shaft 40 circumferential fixed delivery moments of torsion, described input tape axle mechanism 20 comprises input tape wheel shaft 21 and goes up adjustable fixed cone dish 22 and the movable awl dish 23 of the axial spacing that cooperatively interacts that is provided with, output pulley axis mechanism 30 comprises activity awl dish 32 sheathed on fixed cone dish 31 and the torque output shaft 40 on the torque output shaft 40, movable awl dish 32 moves axially with torque output shaft 40, circumferentially fixedly connected, have at least one to exert pressure by spring and to keep work cell distance between itself and fixed cone dish in described movable awl dish 23 and the movable awl dish 32.
The back side that preferred scheme is the conical surface of described movable awl dish 23 and movable awl dish 32 respectively is provided with spring flange 26,33, between movable awl dish 23 and the spring flange 26 spring 24 is set, and between movable awl dish 32 and the spring flange 33 spring 35 is set.
The characteristic of the spring 24 between described movable awl dish 23 and the spring flange 26 is determined as follows: spring force F2 basis is determined when maximum (when the being the speed ratio lowest gear) steel band of distance between movable awl dish 23 and the fixed cone dish 22 transmits design torque, spring force F1 is according to definite when distance between movable awl dish 23 and the fixed cone dish 22 minimum when the most high-grade (be speed ratio) the steel band transmission design torque, the difference f2-f1 of spring deflection be movable awl dish 23 from the most high-grade distance that when lowest gear changes, is moved, Fig. 5 is the performance diagram of spring 24; Spring 35 characteristics between movable awl dish 32 and the spring flange 33 are determined as follows: spring force F3 is according to determining when minimum (when the being the speed ratio lowest gear) steel band of distance between movable awl dish 32 and the fixed cone dish 31 transmits design torque, spring force F4 is according to definite when distance between movable awl dish 32 and the fixed cone dish 31 maximum when the most high-grade (be speed ratio) the steel band transmission design torque, the difference f4-f3 of spring deflection be movable awl dish 23 from the most high-grade distance that when lowest gear changes, is moved, Fig. 6 is the performance diagram of spring 35.Its clamping pressure to steel band of spring of determining characteristic according to above scheme will change along with the variation of speed ratio, selects suitable characteristic will make the clamping pressure under each speed ratio reach optimum value, thereby improves the transmission efficiency of steel band.
The groove that the back side of described movable awl dish 23 is provided with annular holds spring 24, and the front-end face of spring flange 26 is resisted against on the spring 24.Adopt spring can provide even reliable elastic force and axial arranged space little.
Between the annular back face of described movable awl dish 32 and the spring flange 33 spring 35 is set, spring 35 is set in movable awl and coils on the tube wall of column at 32 back sides, spring flange 33 is fixing by the nut 34 that torque output shaft 40 is provided with, the reasonable Arrangement that this structure is convenient to torque output shaft 40 with and the assembling of going up each parts, it is stressed more reasonable simultaneously.
Offer the bar-shaped trough of arranging along the axial length direction 211,41 on the input tape wheel shaft 21 that cooperates with described movable awl dish 23,32, the axle body of torque output shaft 40, the cavity that the groove fit of offering on the hole wall of bar- shaped trough 211,41 and movable awl dish 23,32 constitutes accommodates steel ball 25,42 respectively.This structure is convenient to realize that both are rotatably assorted synchronously, guarantees axially movable realization simultaneously.
Described movable awl dish 23 also links to each other with speed regulating mechanism, and speed regulating mechanism comprises the dc stepper motor 50 that is connected on the casing 70, and worm screw 52 is connected by coupling 54 with motor shaft, worm screw 52 by Bearing Installation on casing 70; Worm gear 53 is installed on the gear shaft 55 by key, and gear shaft 55 is installed on the casing 70 by bearings at both ends, and wherein worm gear 53 is meshing with each other with worm screw 52; Gear ring 56 inboards have the drving sprial pair, the outside is a spur gear, gear ring 56 is installed on the activity awl dish 23 of input tape wheel shaft 21 by bearing 57, the activity awl dish 23 of gear ring 56 relative input tape wheel shafts 21 circumferentially relatively rotates, axially by snap ring 58,59 are axially fixed in gear ring 56 on the activity awl dish 23 of input tape wheel shaft 21, gear 51 on external tooth on the gear ring 56 and the gear shaft 55 is meshing with each other, the outer ring of the screw rod 60 of base shape has screw thread to cooperate formation power screw pair with the thread section of gear ring 56 inboards, screw rod 60 is fixed on the casing 70, and with respect to casing, axial and circumferential all are fixed.When stepper motor 50 rotates, driving worm screw 52 via shaft joint 54 rotates, worm screw 52 cooperates driven gear axle 55 to rotate with worm gear 53, gear 51 servo-actuateds and then drive gear ring 56 rotate, because screw rod 60 is fixed on the casing, make gear ring 56 will move axially again when rotating, simultaneously owing to gear ring 56 and movable awl dish 23 axially are fixed, so movable awl dish 23 moves axially simultaneously, thereby the adjustment of spacing between realization activity awl dish 23 and the fixed cone dish 22 has realized the adjusting of rotating speed.
Just can realize that by changing motor steering the movable awl dish of input tape wheel shaft 23 axially moves towards different direction, thus the realization speed changing function.Because the input output belt shaft all has clamping force and both sides clamping force size to be more or less the same to steel band, and the motor output movement by the deceleration of worm gear snail thick stick, gear and screw pair after power obtain amplifying, foot has promoted input tape wheel shaft movable pressure plate 29 and has axially moved, and realizes speed change.
Say briefly, speed regulating mechanism is realized by above-mentioned leading screw and nut mechanism, because two springs can obtain good balance, the axial force that makes screw mandrel provide is almost very little, so by the suitable intermediate reduction gear ratio of selection, thereby the function of selecting dc micro-motor just can provide corresponding axial force to realize speed governing satisfies the requirement to speed change speed simultaneously.
Claims (7)
1, a kind of stepless speed variator, transmission steel band (10) is set between input tape axle mechanism (20) and output pulley axis mechanism (30) mechanism, output pulley axis mechanism (30) and the circumferential fixed delivery moment of torsion of torque output shaft (40), described input tape axle mechanism (20) comprises input tape wheel shaft (21) and goes up adjustable fixed cone dish (22) and the movable awl dish (23) of the axial spacing that cooperatively interacts that is provided with, output pulley axis mechanism (30) comprises has fixed cone dish (31) and torque output shaft (40) to go up sheathed activity awl dish (32) on the torque output shaft (40), movable awl dish (32) moves axially with torque output shaft (40), circumferentially fixedly connected, it is characterized in that: have at least one to provide clamping pressure to keep work cell distance between itself and fixed cone dish in activity awl dish (23) on described input tape axle mechanism (20) and the output pulley axis mechanism (30) and the movable awl dish (32) by spring.
2, stepless speed variator according to claim 1, it is characterized in that: the back side of the conical surface of described movable awl dish (23) and movable awl dish (32) respectively is provided with spring flange (26), (33), between movable awl dish (23) and the spring flange (26) spring (24) is set, between movable awl dish (32) and the spring flange (33) spring (35) is set.
3, the spring that stepless speed variator according to claim 1 and 2 is used, it is characterized in that: the characteristic of the spring (24) between described movable awl dish (23) and the spring flange (26) is determined as follows: spring force F2 basis is determined when the maximum steel band of distance between movable awl dish (23) and the fixed cone dish (22) transmits design torque, spring force F1 is according to what determine when the minimum steel band of distance between movable awl dish (23) and the fixed cone dish (22) transmits design torque, and the difference f2-f1 of spring deflection is that movable awl dish (23) is from the most high-grade distance that is moved when lowest gear changes; Spring (35) characteristic between movable awl dish (32) and the spring flange (33) is determined as follows: spring force F3 is according to determining when the minimum steel band of distance between movable awl dish (32) and the fixed cone dish (31) transmits design torque, spring force F4 is according to determine that the difference f4-f3 of spring deflection is that movable awl dish (23) is from the most high-grade distance that is moved when lowest gear changes when the maximum steel band of distance between movable awl dish (32) and the fixed cone dish (31) transmits design torque.
4, stepless speed variator according to claim 1 is characterized in that: the groove that the back side of described movable awl dish (23) is provided with annular holds spring (24), and the front-end face of spring flange (26) is resisted against on the spring (24).
5, stepless speed variator according to claim 1, it is characterized in that: between the annular back face of described movable awl dish (32) and the spring flange (33) spring (35) is set, spring (35) is set on the tube wall of column of annular back face of movable awl dish (32), and it is fixing that spring flange (33) is gone up the nut (34) that is provided with by torque output shaft (40).
6, according to claim 2 or 4 or 5 described stepless speed variators, it is characterized in that: offer bar-shaped trough (211), (41) arranged along the axial length direction on the input tape wheel shaft (21) that cooperates with described movable awl dish (23), (32), the axle body of torque output shaft (40), the cavity that the groove fit of offering on the hole wall of bar-shaped trough (211), (41) and movable awl dish (23), (32) constitutes accommodates steel ball (25), (42) respectively.
7, according to claim 2 or 4 or 5 described stepless speed variators, it is characterized in that: described movable awl dish (23) also links to each other with speed regulating mechanism, speed regulating mechanism comprises the dc stepper motor (50) that is connected on the casing (70), worm screw (52) is connected by coupling (54) with motor shaft, worm screw (52) by Bearing Installation on casing (70); Worm gear (53) is installed on the gear shaft (55) by key, and gear shaft (55) is installed on the casing (70) by bearings at both ends, and wherein worm gear (53) is meshing with each other with worm screw (52); Gear ring (56) inboard has the drving sprial pair, the outside is a spur gear, gear ring (56) is installed on the movable awl dish of input tape wheel shaft (23) by bearing (57), circumferentially the relative movable awl dish of input tape wheel shaft of gear ring (56) (23) relatively rotates, axially by snap ring (58), (59) gear ring 28 is axially fixed on the movable awl dish of input tape wheel shaft (23), gear (51) on external tooth on the gear ring (56) and the gear shaft (55) is meshing with each other, the screw rod of base shape (60) outer ring has the thread section of screw thread and gear ring (56) inboard to cooperate formation power screw pair, and screw rod (60) is fixed on the casing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009101160613A CN101463886A (en) | 2009-01-14 | 2009-01-14 | Continuously variable transmission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009101160613A CN101463886A (en) | 2009-01-14 | 2009-01-14 | Continuously variable transmission |
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| Publication Number | Publication Date |
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| CN101463886A true CN101463886A (en) | 2009-06-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2009101160613A Pending CN101463886A (en) | 2009-01-14 | 2009-01-14 | Continuously variable transmission |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102339045A (en) * | 2011-07-12 | 2012-02-01 | 上海普天邮通科技股份有限公司 | Centrifugal load speed regulating equipment and monitoring system |
| WO2013007186A1 (en) * | 2011-07-11 | 2013-01-17 | Cheng Naishi | Economical energy-saving continuously variable transmission |
| CN104179921A (en) * | 2014-08-02 | 2014-12-03 | 山东交通学院 | Electronic control device for combined-type automobile automatic transmission |
| CN106946091A (en) * | 2017-03-22 | 2017-07-14 | 广东工业大学 | A kind of variable speed Winder |
| CN109130836A (en) * | 2018-10-24 | 2019-01-04 | 吉林大学 | The hybrid power system of integrated hydraulic auxiliary braking and energy regenerating reuse means |
-
2009
- 2009-01-14 CN CNA2009101160613A patent/CN101463886A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013007186A1 (en) * | 2011-07-11 | 2013-01-17 | Cheng Naishi | Economical energy-saving continuously variable transmission |
| CN102339045A (en) * | 2011-07-12 | 2012-02-01 | 上海普天邮通科技股份有限公司 | Centrifugal load speed regulating equipment and monitoring system |
| CN104179921A (en) * | 2014-08-02 | 2014-12-03 | 山东交通学院 | Electronic control device for combined-type automobile automatic transmission |
| CN106946091A (en) * | 2017-03-22 | 2017-07-14 | 广东工业大学 | A kind of variable speed Winder |
| CN109130836A (en) * | 2018-10-24 | 2019-01-04 | 吉林大学 | The hybrid power system of integrated hydraulic auxiliary braking and energy regenerating reuse means |
| CN109130836B (en) * | 2018-10-24 | 2024-04-16 | 吉林大学 | Hybrid power system integrated with hydraulic auxiliary braking and energy recycling device |
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Open date: 20090624 |