CN113685527B - Longitudinally-arranged stepless speed changer - Google Patents
Longitudinally-arranged stepless speed changer Download PDFInfo
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- CN113685527B CN113685527B CN202111043465.1A CN202111043465A CN113685527B CN 113685527 B CN113685527 B CN 113685527B CN 202111043465 A CN202111043465 A CN 202111043465A CN 113685527 B CN113685527 B CN 113685527B
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- 230000007246 mechanism Effects 0.000 claims abstract description 126
- 230000005540 biological transmission Effects 0.000 claims abstract description 106
- 230000009467 reduction Effects 0.000 claims abstract description 68
- 230000008859 change Effects 0.000 claims abstract description 49
- 238000013016 damping Methods 0.000 claims description 11
- 230000008901 benefit Effects 0.000 description 5
- 230000006872 improvement Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
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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
- F16H47/00—Combinations of mechanical gearing with fluid clutches or fluid gearing
- F16H47/06—Combinations of mechanical gearing with fluid clutches or fluid gearing the fluid gearing being of the hydrokinetic type
- F16H47/08—Combinations of mechanical gearing with fluid clutches or fluid gearing the fluid gearing being of the hydrokinetic type the mechanical gearing being of the type with members having orbital motion
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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
- F16H57/00—General details of gearing
- F16H57/08—General details of gearing of gearings with members having orbital motion
- F16H57/10—Braking arrangements
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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
- F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
- F16H63/02—Final output mechanisms therefor; Actuating means for the final output mechanisms
- F16H63/30—Constructional features of the final output mechanisms
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transmission Devices (AREA)
Abstract
The invention discloses a longitudinally arranged continuously variable transmission, which comprises an output shaft, a continuously variable transmission mechanism, a forward reverse gear switching mechanism for switching a forward gear and a reverse gear, a gear transmission mechanism and a reduction gear mechanism connected with the continuously variable transmission mechanism and the gear transmission mechanism, wherein the forward reverse gear switching mechanism is connected with the forward reverse gear switching mechanism, and the reduction gear mechanism is connected with the output shaft. The longitudinal stepless speed changer adopts a mode of combining a stepless speed change mechanism and a gear speed change mechanism, realizes a larger speed change range, and realizes higher torque bearing capacity and higher transmission efficiency under a low-speed working condition; but also can improve the compactness of the arrangement structure and reduce the weight and the cost.
Description
Technical Field
The invention belongs to the technical field of speed variators, and particularly relates to a longitudinally-arranged stepless speed changer.
Background
The value of dividing the maximum total transmission ratio by the minimum total transmission ratio of the transmission is called as the speed change range of the transmission, which represents the speed change capability of the transmission, the larger the speed change range is, the improvement of the power performance and the economy level of the whole vehicle and the reduction of the noise of the high-speed cruising working condition of the whole vehicle are facilitated, the speed change range of the stepless speed change mechanism depends on the maximum running radius and the minimum running radius of the input cone pulley and the output cone pulley, and the speed change range of the longitudinally arranged stepless speed change of the existing structure is greatly limited under the constraints of bearing torque, structure, size and the like.
Another requirement of the longitudinally-arranged continuously variable transmission with the existing structure is that when the transmission is in a low-speed working condition, the transmission ratio of the continuously variable transmission mechanism is in a large transmission ratio position, the torque of power input by a power source can be greatly amplified, the transmission part bears extremely large load under a limit large-torque working condition, the bearing capacity of the continuously variable transmission mechanism under the large transmission ratio working condition is insufficient, a method of limiting the maximum input torque or reducing the maximum transmission ratio is generally adopted in design, and negative effects such as insufficient power or reduction of a speed ratio range are brought.
The transmission efficiency of the stepless speed change mechanism is lower under the working condition of a large transmission ratio under the influence of the self efficiency characteristic of the stepless speed change mechanism, and in addition, the hydraulic system pushing the conical disc to clamp needs hydraulic support with enough pressure under the working condition of the large transmission ratio and the large torque, so that the load consumption of an oil pump providing hydraulic pressure is increased; the existing continuously variable transmission is low in efficiency under the working condition of large transmission ratio and large torque.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the invention provides a longitudinally arranged continuously variable transmission, with the aim of improving the speed change range and the compactness of the arrangement structure.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: the longitudinal stepless speed changer comprises an output shaft, a stepless speed change mechanism, a forward reverse gear switching mechanism for switching a forward gear and a reverse gear, a gear speed change mechanism connected with the forward reverse gear switching mechanism and a reduction gear mechanism connected with the stepless speed change mechanism and the gear speed change mechanism, wherein the reduction gear mechanism is connected with the output shaft, and the forward gear transmission ratio of the gear speed change mechanism is larger than 1.
The speed reduction gear mechanism comprises a middle shaft, a primary speed reduction driving gear, a primary speed reduction driven gear which is arranged on the middle shaft and meshed with the primary speed reduction driving gear, a secondary speed reduction driving gear which is arranged on the middle shaft, and a secondary speed reduction driven gear which is meshed with the secondary speed reduction driving gear, wherein the secondary speed reduction driven gear is connected with the output shaft.
The primary reduction driving gear is connected with the stepless speed change mechanism through a first clutch.
The gear shifting mechanism comprises a gear input shaft connected with the forward reverse gear switching mechanism, a gear driving gear arranged on the gear input shaft and a gear driven gear rotatably arranged on the intermediate shaft and meshed with the gear driving gear, and a synchronizer used for controlling the gear driven gear to be engaged with and separated from the intermediate shaft is arranged on the intermediate shaft.
The gear driven gear and the synchronizer are located between the primary reduction driven gear and the secondary reduction driving gear.
The forward reverse gear switching mechanism comprises a forward gear clutch, a reverse gear brake and a planetary gear mechanism, wherein the planetary gear mechanism is connected with the forward gear clutch, the reverse gear brake and the stepless speed change mechanism, and the gear speed change mechanism is connected with the planetary gear mechanism.
The longitudinal stepless speed changer also comprises a torsion vibration reduction component, and the stepless speed change mechanism is positioned between the torsion vibration reduction component and the forward reverse gear switching mechanism.
The stepless speed change mechanism comprises an input cone pulley and an output cone pulley, wherein the input cone pulley is connected with the torsional vibration damping component and the forward reverse gear switching mechanism, the input cone pulley is positioned between the torsional vibration damping component and the forward reverse gear switching mechanism, the output cone pulley is connected with the first clutch, and the first clutch is positioned between the output cone pulley and the reduction gear mechanism.
The torsional vibration damping component is a hydraulic torque converter, a dual-mass flywheel or a torsional vibration damper.
The longitudinal stepless speed changer adopts a mode of combining a stepless speed change mechanism and a gear speed change mechanism, realizes a larger speed change range, and realizes higher torque bearing capacity and higher transmission efficiency under a low-speed working condition; but also can improve the compactness of the arrangement structure and reduce the weight and the cost.
Drawings
The present specification includes the following drawings, the contents of which are respectively:
FIG. 1 is a schematic view of a longitudinally disposed continuously variable transmission of the present invention;
marked in the figure as: 1. a torque converter; 1a, a pump wheel; 1b, a turbine; 1c, a guide wheel; 2. a transmission housing; 3. an input shaft; 4. a transmission belt; 5. an output cone pulley; 5a, a first output cone disc; 5b, a second output conical disc; 6. inputting cone pulley; 6a, a first input cone disc; 6b, a second input cone disc; 7. a first clutch; 9. a primary reduction drive gear; 10. a first-stage reduction driven gear; 11. a gear shift input shaft; 15. a synchronizer; 16. a gear shift driven gear; 17. a gear drive gear; 18. a secondary reduction driven gear; 19. an output shaft; 20. a secondary reduction drive gear; 21. an intermediate shaft; 27. a forward clutch; 28. a reverse brake; 29. a planetary gear mechanism; 29a, a planetary gear input member; 29b, a planetary gear output member; 30. forward and reverse gear switching mechanism.
Detailed Description
The following detailed description of the preferred embodiments of the present invention, given by way of example only, is presented in order to facilitate a more complete, accurate and thorough understanding of the concepts and aspects of the present invention by those skilled in the art and to facilitate its practice.
As shown in fig. 1, the present invention provides a longitudinally arranged continuously variable transmission, comprising an output shaft 19, a torsional vibration damping member, a continuously variable transmission mechanism, a forward reverse gear switching mechanism 30 for switching forward gears and reverse gears, a gear shifting mechanism connected with the forward reverse gear switching mechanism 30, and a reduction gear mechanism connected with the continuously variable transmission mechanism and the gear shifting mechanism, wherein the reduction gear mechanism is connected with the output shaft 19, and the forward gear transmission ratio of the gear shifting mechanism is greater than 1.
Specifically, as shown in fig. 1, the continuously variable transmission mechanism is located between the forward reverse switching mechanism 30 and a torsional vibration damping member that is connected to a power source. The stepless speed change mechanism mainly comprises an input cone pulley 6, an output cone pulley 5 and a transmission belt 4 matched with the input cone pulley 6 and the output cone pulley 5, wherein a central shaft of the input cone pulley 6 is connected with an input shaft 3, the input shaft 3 is connected with a torsional vibration damping component, the input cone pulley 6 is composed of a first input cone disc 6a and a second input cone disc 6b, the first input cone disc 6a and the second input cone disc 6b are connected in a non-relative rotation mode and can move relative to each other within a certain range, the output cone pulley 5 is composed of a first output cone disc 5a and a second output cone disc 5b, the transmission belt 4 is wound between the input cone pulley 6 and the output cone pulley 5 in a relatively axial mode within a certain range, the transmission belt 4 is clamped in a controllable mode through the first input cone disc 6a and the second input cone disc 6b, and the transmission belt 4 is clamped in a controllable mode through the first output cone disc 5a and the second output cone disc 5 b.
As shown in fig. 1, the reduction gear mechanism includes a counter shaft 21, a primary reduction driving gear 9, a primary reduction driven gear 10 provided on the counter shaft 21 and meshed with the primary reduction driving gear 9, a secondary reduction driving gear 20 provided on the counter shaft 21, and a secondary reduction driven gear 18 meshed with the secondary reduction driving gear 20, the secondary reduction driven gear 18 being connected with an output shaft 19. The primary reduction driving gear 9 is connected with the stepless speed change mechanism through a first clutch 7, the first clutch 7 is used for controlling the transmission and interruption of power between the reduction gear mechanism and the stepless speed change mechanism, the first clutch 7 is coaxially arranged with the output cone pulley 5, and the input end of the first clutch 7 is connected with the output cone pulley 5 in a non-relative rotation way. The primary reduction driven gear 10 is fixedly connected with the intermediate shaft 21 in a coaxial manner, the secondary reduction driving gear 20 is fixedly connected with the intermediate shaft 21 in a coaxial manner, the secondary reduction driven gear 18 is fixedly connected with the output shaft 19 in a coaxial manner, the output shaft 19 and the rotation center shaft of the output cone pulley 5 are mutually parallel, and the output shaft 19 is a power output part of the longitudinal stepless speed changer.
As shown in fig. 1, the gear change mechanism includes a gear input shaft 11 connected to a forward/reverse shift mechanism 30, a gear drive gear 17 provided on the gear input shaft 11, and a gear driven gear 16 rotatably provided on an intermediate shaft 21 and meshed with the gear drive gear 17, and a synchronizer 15 provided on the intermediate shaft 21 for controlling engagement and disengagement of the gear driven gear 16 with and from the intermediate shaft 21. The axis of the gear input shaft 11 is parallel to the axis of the intermediate shaft 21, and the gear input shaft 11 is coaxially arranged with the forward reverse gear switching mechanism 30 and is connected with the output part of the planetary gear mechanism 29 on the forward reverse gear switching mechanism 30 in a non-relative rotation manner; the gear input shaft 11 is provided with a gear driving gear 17 which is not connected with the gear input shaft in a relative rotation mode, the intermediate shaft 21 is provided with a synchronizer 15 which is not connected with the gear input shaft in a relative rotation mode, the intermediate shaft 21 is also provided with a gear driven gear 16 which can freely rotate relative to the intermediate shaft 21, the gear driven gear 16 and the synchronizer 15 are positioned between the primary reduction driven gear 10 and the secondary reduction driving gear 20, and the diameter of the gear driving gear 17 is smaller than that of the gear driven gear 16. The gear stage driven gear 16 is arranged between the synchronizer 15 and the secondary reduction driving gear 20, or the gear stage driven gear 16 is arranged between the synchronizer 15 and the primary reduction driven gear 10. The synchronizer 15 has an engaging sleeve which is axially movable without being connected to the intermediate shaft 21 in a relatively rotatable manner, and has two operating state positions, which are a position engaged with the gear driven gear 16 and a position separated from the gear driven gear 16, respectively. After the engaging gear sleeve is engaged with the gear driven gear 16, the synchronizer 15 connects the gear driven gear 16 and the intermediate shaft 21 into a whole, and the gear driven gear 16 and the intermediate shaft 21 can synchronously rotate; after the engaging gear sleeve is separated from the gear driven gear 16, the synchronizer 15 cannot connect the gear driven gear 16 and the intermediate shaft 21 into a whole, and the gear driven gear 16 cannot rotate synchronously with the intermediate shaft 21, and at this time, the gear driven gear 16 is empty sleeved on the intermediate shaft 21.
As shown in fig. 1, the forward reverse gear shift mechanism 30 preferably includes a forward gear clutch 27, a reverse gear brake 28, and a planetary gear mechanism 29, and the planetary gear mechanism 29 is coaxially arranged with the input cone pulley 6. The planetary gear mechanism 29 includes a planetary carrier, a planetary input member 29a, a planetary output member 29b, and a planetary gear rotatably provided on the planetary carrier, the planetary gear being engaged with the planetary input member 29a and the planetary output member 29b, the planetary input member 29a and the planetary output member 29b being coaxially provided. The carrier is connected to a reverse brake 28, the reverse brake 28 is used for braking the carrier, the gear change mechanism is connected to a planetary gear output member 29b of the planetary gear mechanism 29, the planetary gear input member 29a is connected to the central shaft of the input cone 6 without relative rotation, the planetary gear input member 29a is connected to a forward clutch 27, and the forward clutch 27 is used for engagement and disengagement between the planetary gear input member 29a and the planetary gear output member 29 b.
As shown in fig. 1, the longitudinally-arranged continuously variable transmission of the present invention has two power transmission paths, which are a first power transmission path and a second power transmission path, respectively. The first power transmission path is a path through which power of the power source is transmitted sequentially through the center shaft of the input cone pulley 6, the forward reverse gear switching mechanism 30, the gear change mechanism, the intermediate shaft 21, the secondary reduction driving gear 20, the secondary reduction driven gear 18, and the output shaft 19; the second power transmission path is a path through which power of the power source is transmitted via the continuously variable transmission mechanism, the first clutch 7, the reduction gear mechanism, and the output shaft 19. The first power transmission path and the second power transmission path are switched by the cooperation of the forward reverse switching mechanism 30 and the first clutch 7, so that the power of the power source can be selectively transmitted through the first power transmission path and the second power transmission path.
The torsional vibration damping component may be a hydrodynamic torque converter, a dual mass flywheel or a torsional vibration damper. As shown in fig. 1, in the present embodiment, the torsional vibration damping member is a torque converter 1.
The longitudinal stepless speed changer has three actual working gears, namely a reverse gear, a forward gear and a stepless speed change gear.
When the continuously variable transmission of the present invention is in the reverse gear, the forward clutch 27 in the forward reverse shift mechanism 30 is in a disengaged state, the planetary gear input member 29a and the planetary gear output member 29b are rotatable relative to each other, the reverse brake 28 is in an engaged state, the reverse brake 28 brakes the carrier, the carrier is unable to rotate, the first clutch 7 is in a disengaged state, the engagement sleeve of the synchronizer 15 is moved to a position engaged with the gear driven gear 16, and the power of the power source is transmitted to the output shaft 19 via the torsional vibration damper, the input shaft 3, the central shaft of the input cone 6, the planetary gear input member 29a, the planetary gear output member 29b, the gear input shaft 11, the gear drive gear 17, the gear driven gear 16, the synchronizer 15, the intermediate shaft 21, the secondary reduction drive gear 20 and the secondary reduction driven gear 18 in this order, whereby the reverse gear function is realized.
When the longitudinally-arranged continuously variable transmission is in a forward gear position, a forward clutch 27 in a forward reverse gear switching mechanism 30 is in an engaged state, the forward clutch 27 connects a planetary gear input part 29a and a planetary gear output part 29b into a whole, the planetary gear input part 29a and the planetary gear output part 29b cannot rotate relatively, a reverse gear brake 28 is in a disengaged state, a planet carrier can rotate, a first clutch 7 is in a disengaged state, an engagement tooth sleeve of a synchronizer 15 moves to a position engaged with a gear driven gear 16, and power of a power source is sequentially transmitted to an output shaft 19 through a torsional vibration reduction part, an input shaft 3, a central shaft of an input cone 6, an integral structure formed by the planetary gear mechanism 29 and the forward clutch 27, a gear input shaft 11, a gear driving gear 17, a gear driven gear 16, the synchronizer 15, an intermediate shaft 21, a secondary reduction driving gear 20 and a secondary reduction driven gear 18, and power of the output shaft 19 is transmitted to wheels of a vehicle, so that a forward gear function is realized, and the forward gear is normally used as a first gear for starting a vehicle.
When the longitudinal continuously variable transmission is in a continuously variable transmission gear, the forward gear clutch 27 is in a disengaged state, the planetary gear input member 29a and the planetary gear output member 29b can rotate relatively, the reverse gear brake 28 is in a disengaged state, the carrier can rotate, the first clutch 7 is in an engaged state, the power of the power source is transmitted to the output shaft 19 through the torsional vibration damper member, the input shaft 3, the continuously variable transmission mechanism, the first clutch 7 and the reduction gear mechanism in sequence, and the power of the output shaft 19 is transmitted to wheels of a vehicle. The input cone pulley 6 and the output cone pulley 5 of the stepless speed change mechanism are respectively provided with a hydraulic piston clamping mechanism, the hydraulic pressure of the hydraulic piston clamping mechanism on the input cone pulley 6 is adjusted to adjust the clamping force of the two cone discs on the transmission belt 4, the hydraulic pressure of the hydraulic piston clamping mechanism on the input cone pulley 6 is adjusted to adjust the clamping force of the two cone discs on the output cone pulley 5 to the transmission belt 4, the transmission belt 4 is kept in a 'tightening' state under the combined action of the clamping forces exerted by the input cone pulley 6 and the output cone pulley 5 to transmit power, the value of the running radius of the transmission belt 4 on the output cone pulley 5 divided by the running radius of the transmission belt 4 on the input cone pulley 6 is called a transmission ratio, the running radius of the transmission belt 4 on the input cone pulley 6 and the running radius of the transmission belt 4 on the output cone pulley 5 can be adjusted by adjusting the hydraulic pressure of the hydraulic piston clamping mechanism on the input cone pulley 6 and the transmission belt 5 respectively, the transmission ratio of the stepless speed change mechanism can be adjusted, and the transmission ratio of the stepless speed change mechanism can be continuously adjusted, and the stepless speed change function is realized.
The longitudinal continuously variable transmission of the present invention is provided with the forward gear stage, the forward gear stage transmission ratio of the longitudinal continuously variable transmission gear shifting mechanism is greater than 1, and the total transmission ratio of the forward gear stage of the gear shifting mechanism can be set to be greater than the maximum total transmission ratio of the step transmission mechanism of the conventional continuously variable transmission, so that the value obtained by dividing the total transmission ratio of the forward gear stage of the longitudinal continuously variable transmission of the present invention by the minimum total transmission ratio of the continuously variable transmission mechanism in the longitudinal continuously variable transmission of the present invention is greater than the value obtained by dividing the maximum total transmission ratio of the continuously variable transmission mechanism of other conventional continuously variable transmissions by the minimum total transmission ratio of the continuously variable transmission mechanism, and therefore the present invention has a larger gear shift range than the conventional known continuously variable transmission.
On the other hand, the continuously variable transmission of the present invention can be designed to have a larger shift range than the conventionally known continuously variable transmission while moderately reducing the shift range of the continuously variable transmission mechanism therein, which brings about an advantage that the size and weight of the input cone pulley 6, the output cone pulley 5, and the support housing thereof of the continuously variable transmission mechanism can be relatively reduced and lowered.
The gear change mechanism provided in the longitudinally arranged continuously variable transmission of the present invention brings about another advantage in that the gear steps are usually set as starting steps, i.e. first and reverse steps, for starting and low vehicle speed conditions, the first and reverse steps usually having a large gear ratio under which the torque value of the power input by the power source is greatly amplified so that the power transmitting member is subjected to a large load, and the transmission of the present invention is transmitted by the gear change mechanism under such low vehicle speed conditions, at which time the continuously variable transmission mechanism does not transmit power.
The gear speed change mechanism is obviously superior to the stepless speed change mechanism in bearing capacity and transmission efficiency, so that the longitudinal stepless speed change device has the advantages of higher torque bearing capacity and higher transmission efficiency under the working condition of low vehicle speed compared with the traditional longitudinal stepless speed change device.
One of the features of the longitudinally arranged continuously variable transmission of the present invention is that a synchronizer 15 without relative rotation connection is arranged on the intermediate shaft 21 for realizing gear shift, and a gear shift driven gear 16 which can freely rotate relative to the intermediate shaft 21 and is hollow is also arranged, and the design has the advantages that the first power transmission path and the second power transmission path can share a plurality of parts without additional arrangement, and the shared parts comprise the intermediate shaft 21 and a supporting bearing thereof, a secondary reduction driving gear 20 and a secondary reduction driven gear 18, thereby saving the number of parts and arrangement space and reducing weight and cost.
From the above description of the specific embodiments of the longitudinally arranged continuously variable transmission according to the present invention, it can be seen that the non-limiting innovation and advantage of the present invention is that a compact, low weight, low cost longitudinally arranged continuously variable transmission structure is achieved, while a larger transmission range is achieved, a higher torque carrying capacity at low speeds and a higher transmission efficiency are achieved.
The invention is described above by way of example with reference to the accompanying drawings. It will be clear that the invention is not limited to the embodiments described above. As long as various insubstantial improvements are made using the method concepts and technical solutions of the present invention; or the invention is not improved, and the conception and the technical scheme are directly applied to other occasions and are all within the protection scope of the invention.
Claims (2)
1. The utility model provides a indulge and put continuously variable transmission, includes output shaft, continuously variable transmission mechanism and is used for switching forward gear and the forward reverse gear shifter of reverse gear, its characterized in that: the device also comprises a gear speed changing mechanism connected with the forward reverse gear switching mechanism and a speed reducing gear mechanism connected with the stepless speed changing mechanism and the gear speed changing mechanism, wherein the speed reducing gear mechanism is connected with the output shaft, and the forward gear transmission ratio of the gear speed changing mechanism is larger than 1;
the speed reduction gear mechanism comprises a middle shaft, a primary speed reduction driving gear, a primary speed reduction driven gear which is arranged on the middle shaft and meshed with the primary speed reduction driving gear, a secondary speed reduction driving gear which is arranged on the middle shaft, and a secondary speed reduction driven gear which is meshed with the secondary speed reduction driving gear, wherein the secondary speed reduction driven gear is connected with the output shaft;
the primary reduction driving gear is connected with the stepless speed change mechanism through a first clutch;
the gear speed change mechanism comprises a gear input shaft connected with the forward and reverse gear switching mechanism, a gear driving gear arranged on the gear input shaft and a gear driven gear rotatably arranged on the intermediate shaft and meshed with the gear driving gear, and a synchronizer used for controlling the gear driven gear to be engaged with and separated from the intermediate shaft is arranged on the intermediate shaft;
the gear driven gear and the synchronizer are positioned between the primary reduction driven gear and the secondary reduction driving gear;
the forward reverse gear switching mechanism comprises a forward gear clutch, a reverse gear brake and a planetary gear mechanism, the planetary gear mechanism is connected with the forward gear clutch, the reverse gear brake and the stepless speed change mechanism, and the gear speed change mechanism is connected with the planetary gear mechanism;
the longitudinal stepless speed changer also comprises a torsion vibration reduction part, and the stepless speed change mechanism is positioned between the torsion vibration reduction part and the forward reverse gear switching mechanism;
the stepless speed change mechanism comprises an input cone pulley and an output cone pulley, wherein the input cone pulley is connected with the torsional vibration damping component and the forward reverse gear switching mechanism, the input cone pulley is positioned between the torsional vibration damping component and the forward reverse gear switching mechanism, the output cone pulley is connected with the first clutch, and the first clutch is positioned between the output cone pulley and the reduction gear mechanism.
2. The longitudinally disposed continuously variable transmission of claim 1, wherein: the torsional vibration damping component is a hydraulic torque converter, a dual-mass flywheel or a torsional vibration damper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111043465.1A CN113685527B (en) | 2021-09-07 | 2021-09-07 | Longitudinally-arranged stepless speed changer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111043465.1A CN113685527B (en) | 2021-09-07 | 2021-09-07 | Longitudinally-arranged stepless speed changer |
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| CN113685527A CN113685527A (en) | 2021-11-23 |
| CN113685527B true CN113685527B (en) | 2024-01-26 |
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| CN114165573B (en) * | 2021-12-15 | 2024-09-27 | 芜湖万里扬变速器有限公司 | Longitudinally-arranged stepless speed changer |
| CN117553108B (en) * | 2024-01-12 | 2024-04-30 | 北京中科原动力科技有限公司 | Agricultural machinery gearbox and agricultural machinery |
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| CN104334922A (en) * | 2012-05-23 | 2015-02-04 | 丰田自动车株式会社 | Power transmission device for vehicle |
| CN108019480A (en) * | 2016-11-04 | 2018-05-11 | 上海汽车集团股份有限公司 | Vehicle and its stepless gear system |
| CN108202593A (en) * | 2016-12-19 | 2018-06-26 | 吉林省晟林汽车传动科技有限公司 | Plug-in single motor hybrid automobile power speed changer |
| CN111173912A (en) * | 2020-02-24 | 2020-05-19 | 周玉 | Novel continuously variable transmission |
| CN112248791A (en) * | 2020-10-28 | 2021-01-22 | 湘潭大学 | A hybrid type continuously variable transmission start control device and control method |
| CN113236730A (en) * | 2021-03-23 | 2021-08-10 | 周玉 | Novel continuously variable transmission |
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