CN219317547U - Toothed belt wheel and steel belt transmission mechanism of CVT transmission - Google Patents
Toothed belt wheel and steel belt transmission mechanism of CVT transmission Download PDFInfo
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- CN219317547U CN219317547U CN202222106073.1U CN202222106073U CN219317547U CN 219317547 U CN219317547 U CN 219317547U CN 202222106073 U CN202222106073 U CN 202222106073U CN 219317547 U CN219317547 U CN 219317547U
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Abstract
The utility model discloses a tooth-shaped belt wheel and steel belt transmission mechanism of a CVT (continuously variable transmission), which relates to the technical field of automobile transmissions and solves the problems of poor durability and serious abrasion caused by the fact that the CVT transmits power by friction force, and comprises the following steps: the driving conical pulley left wheel, the driving conical pulley right wheel, the driven conical pulley left wheel and the driven conical pulley right wheel are all conical gears, and the meshing of the steel belt transmission plate and the conical gears can be ensured in the process of pushing the distance between the driving conical pulley left wheel and the driving conical pulley right wheel and the distance between the driven conical pulley left wheel and the driven conical pulley right wheel, so that the stability of power transmission is ensured, the abrasion caused by friction is effectively reduced, and the service life of the CVT transmission is prolonged.
Description
Technical Field
The utility model relates to the technical field of automobile transmissions, in particular to a tooth-shaped belt pulley and steel belt transmission mechanism of a CVT transmission.
Background
Automotive transmissions are important components that affect the power, economy and comfort of the entire vehicle. The engine is an integral body composed of a gear, a shaft and an output shaft, and is mainly used for changing the torque and the rotating speed of the engine, so that the engine can operate at a higher speed under different working conditions, and good comfort is ensured. The continuously variable transmission (ContinuouslyVariableTransmission, CVT) is classified into: VDP (diameter pulley) CVT, extroidCVT (toroidal continuously variable transmission), magneticvt (electromagnetic continuously variable transmission), IVT (infinitely variable transmission), hydrostat cvt (hydrostatic continuously variable transmission) and the like. Although continuously variable transmissions are of various kinds, the existing VDP type CVT is widely installed in passenger cars due to its advantages of simple operation, easy maintenance, continuous speed ratio change, and the like. The principle of speed change is that a driving belt pulley, a driven belt pulley and a transmission steel belt are used for transmitting power through friction force, and the speed change is carried out by changing the transmission diameter of the driving belt pulley and the driven belt pulley.
CVT has the characteristics of compact structure, good smoothness, excellent fuel economy and the like, and is widely applied to the research field of automobile transmission systems. The CVT transmission changes the transmission mode, so that the feel of the jerk caused by gear shifting is not lost, and the power transmission is relatively smooth; the theoretical gear of the continuously variable transmission can be infinitely many, the gear setting is more free, and the gear is more accessible than various performances in the traditional AT transmission system; in addition, the Continuously Variable Transmission (CVT) will bring better dynamic performance and economy when applied to electric vehicles due to the continuously variable nature of its speed ratio, however, the increase in rotational speed will bring new challenges to the transmission of the metal belt. The transmission mechanism of the CVT transmission improves mechanical efficiency to a certain extent, so that fuel economy is more practical, but compared with the traditional automatic transmission, the CVT transmission has the defects that the application time of the CVT transmission on an automobile is not long enough, the quantity of domestic market automobiles is not much enough to be equipped with the CVT, if the operation is improper, the probability of occurrence of problems is high, and the maintenance cost of the CVT transmission is high, so that the maintenance cost of the CVT transmission is high, a continuously variable transmission system adopted by the CVT is a mechanical transmission mode of steel belt transmission, the maximum torque which can be born by the CVT transmission is limited, the CVT transmission is generally only suitable for a car with small displacement, the CVT transmission is easy to wear due to the fact that the power is transmitted by virtue of friction force, and the CVT transmission has poor durability and poor gear shifting smoothness under a low-temperature environment.
In summary, the continuously variable transmission has many drawbacks, such as a common slipping phenomenon, low speed-changing efficiency, small friction coefficient and small transmission friction. Though the fuel saving performance of the CVT is larger than that of a common automatic transmission, the transmission of power is realized by friction, the durability is not very good, and the wear can easily occur; the gear shifting smoothness is not good in a low-temperature environment, the maintenance cost is still relatively high, and the problem is caused by improper operation.
Disclosure of Invention
The utility model aims to solve the problems of poor durability and serious abrasion caused by friction force transmission of the CVT transmission, and provides a toothed belt wheel and steel belt transmission mechanism of the CVT transmission.
In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:
a toothed pulley, steel belt drive mechanism for a CVT transmission comprising: an input system, an output system and a steel belt drive plate 21;
the input system includes: the driving conical pulley comprises an input shaft 1, a driving conical pulley left wheel 2, a first movable speed change sleeve 3, a first roller 4, a driving conical pulley right wheel 5 and a first spring 6, wherein the driving conical pulley left wheel 2 is arranged on the input shaft 1, the first movable speed change sleeve 3 is sleeved on the input shaft 1 and can slide along the input shaft 1 in an operable manner, the driving conical pulley right wheel 5 is sleeved on the first movable speed change sleeve 3 and can slide along the first movable speed change sleeve 3, one end of the first movable speed change sleeve 3 is connected with the first roller 4, the first roller 4 is arranged between the driving conical pulley left wheel 2 and the driving conical pulley right wheel 5, and the first spring 6 is sleeved on the first movable speed change sleeve 3 in a sleeved manner;
the input system further comprises: the first speed regulating motor 7 and the first transmission cam 8, the first transmission cam 8 is arranged on an output shaft 11 of the first speed regulating motor 7, the central axis of the input shaft 1 is parallel to the central axis of the output shaft 11 of the first speed regulating motor 7, the other end of the first movable speed changing sleeve 3 is propped against the outer edge of the end face of the first transmission cam 8, one end of the first spring 6 is propped against the right wheel 5 of the driving conical pulley, and the other end of the first spring 6 is propped against the end face of the first transmission cam 8;
the output system includes: the gear box comprises an output shaft 11, a driven conical pulley left wheel 12, a second movable gear sleeve 13, a second roller 14, a driven conical pulley right wheel 15 and a second spring 16, wherein the driven conical pulley left wheel 12 is arranged on the output shaft 11, the second movable gear sleeve 13 is sleeved on the output shaft 11 and can slide along the output shaft 11 in an operable manner, the driven conical pulley right wheel 15 is sleeved on the second movable gear sleeve 13 and can slide along the second movable gear sleeve 13 in an operable manner, one end of the second movable gear sleeve 13 is connected with the second roller 14, the second roller 14 is arranged between the driven conical pulley left wheel 12 and the driven conical pulley right wheel 15, and the second spring 16 is sleeved on the second movable gear sleeve 13;
the output system further includes: the second speed regulating motor 17 and the second transmission cam 18, the second transmission cam 18 is installed on the output shaft 11 of the second speed regulating motor 17, the central axis of the output shaft 11 is parallel to the central axis of the output shaft 11 of the second speed regulating motor 17, the other end of the second movable speed changing sleeve 13 is propped against the outer edge of the end face of the second transmission cam 18, one end of the second spring 16 is propped against the right wheel 15 of the driven conical pulley, and the other end of the second spring 16 is propped against the end face of the second transmission cam 18;
the first roller 4 and the second roller 14 are in transmission connection through the steel belt transmission sheet 21, the driving conical pulley left wheel 2 and the driving conical pulley right wheel 5 are meshed with the steel belt transmission sheet 21, and the driven conical pulley left wheel 12 and the driven conical pulley right wheel 15 are meshed with the steel belt transmission sheet 21.
The toothed belt wheel and steel belt transmission mechanism of the CVT transmission, wherein the input system further comprises: a first bearing 9, said first bearing 9 being mounted between said first movable shift sleeve 3 and said input shaft 1.
The toothed belt wheel and steel belt transmission mechanism of the CVT transmission, wherein the input system further comprises: the first needle bearing 10 is installed between the first movable speed changing sleeve 3 and the right wheel 5 of the driving conical pulley.
The toothed belt wheel and steel belt transmission mechanism of the CVT transmission, wherein the output system further comprises: a second bearing 19, said second bearing 19 being mounted between said second movable gear sleeve 13 and said output shaft 11.
The toothed belt wheel and steel belt transmission mechanism of the CVT transmission, wherein the output system further comprises: a second needle bearing 20 is mounted between the second movable transmission sleeve 13 and the driven conical pulley right wheel 15, the second needle bearing 20 being mounted between the second movable transmission sleeve and the driven conical pulley right wheel 15.
The toothed belt wheel and steel belt transmission mechanism of the CVT transmission is characterized in that the driving conical belt wheel left wheel 2 is connected with the input shaft 1 through a key, and the driven conical belt wheel left wheel 12 is connected with the output shaft 11 through a key.
The toothed belt wheel and steel belt transmission mechanism of the CVT transmission is characterized in that the inner ring of the first bearing 9 is connected with the input shaft 1 in an interference fit mode, and the outer ring of the first bearing 9 is connected with the inner wall of the first movable speed change sleeve 3 in a sliding mode.
The toothed belt wheel and steel belt transmission mechanism of the CVT transmission is characterized in that the inner ring of the first needle bearing 10 is in sliding connection with the outer wall of the first movable speed change sleeve 3, and the outer ring of the first needle bearing 10 is in interference fit connection with the right wheel 5 of the driving conical toothed belt wheel.
The toothed belt wheel and steel belt transmission mechanism of the CVT transmission is characterized in that the inner ring of the second bearing 19 is in interference fit connection with the output shaft 11, and the outer ring of the second bearing 19 is in sliding connection with the inner wall of the second movable speed change sleeve 13.
The toothed belt wheel and steel belt transmission mechanism of the CVT transmission is characterized in that the inner ring of the second needle bearing 20 is in sliding connection with the outer wall of the second movable speed change sleeve 13, and the outer ring of the second needle bearing 20 is in interference fit connection with the right wheel 15 of the driven conical toothed belt wheel.
The utility model adopts the technology, so that compared with the prior art, the utility model has the positive effects that:
(1) According to the utility model, conical gears are selected for the left wheel of the driving conical pulley, the right wheel of the driving conical pulley, the left wheel of the driven conical pulley and the right wheel of the driven conical pulley, the included angle of the conical surfaces of the pulleys is 11 degrees, the driving conical pulley and the right wheel of the driving conical pulley can be meshed with a steel belt transmission piece, the meshing of the steel belt transmission piece and the conical gears can be ensured in the process of pushing the distance between the left wheel of the driving conical pulley and the right wheel of the driving conical pulley and the distance between the left wheel of the driven conical pulley and the right wheel of the driven conical pulley, dislocation and slipping cannot occur, in the process of changing the transmission ratio of the CVT, the stability of the speed change process is ensured, the stability of power transmission is ensured, and the reaction rate of the CVT in the speed change process is improved;
(2) In the utility model, the conical gear and the steel belt transmission sheet are mutually meshed, the stability of power transmission is ensured by a gear tooth meshed transmission mode, meanwhile, the abrasion caused by friction is effectively reduced, and the service life of the CVT transmission is prolonged.
Drawings
Fig. 1 is a schematic diagram of a toothed pulley, steel belt drive mechanism of a CVT transmission according to the present utility model.
Fig. 2 is a schematic diagram of a gear change mechanism of a toothed pulley, steel belt drive mechanism of a CVT transmission according to the present utility model.
Fig. 3 is a front view of a toothed pulley of a CVT transmission, a driving cone toothed pulley left wheel and/or a driven cone toothed pulley left wheel of a steel belt drive mechanism of the present utility model.
Fig. 4 is a side view of a toothed pulley of a CVT transmission, a driving cone pulley left wheel and/or a driven cone pulley left wheel of a steel belt drive mechanism of the present utility model.
Fig. 5 is a front view of a toothed pulley of a CVT transmission, a right driving cone toothed pulley and/or a right driven cone toothed pulley of a steel belt drive mechanism of the present utility model.
Fig. 6 is a side view of a toothed pulley of a CVT transmission, a right driving cone pulley and/or a right driven cone pulley of a steel belt drive mechanism of the present utility model.
Fig. 7 is a schematic view of the configuration of a toothed pulley, a first movable shift sleeve and/or a second movable shift sleeve of a steel belt drive mechanism of a CVT transmission according to the present utility model.
Fig. 8 is a schematic view of the structure of a toothed pulley, a first roller and/or a second roller of a steel belt drive mechanism of a CVT transmission according to the present utility model.
Fig. 9 is a schematic view of a toothed pulley of a CVT transmission, a steel sheet of a steel belt drive plate of a steel belt drive mechanism of the present utility model.
Fig. 10 is a schematic side view of a toothed pulley of a CVT transmission, steel sheet of a steel belt drive plate of a steel belt drive mechanism of the present utility model.
Fig. 11 is a schematic diagram of a spacer of a toothed pulley of a CVT transmission, a steel belt drive plate of a steel belt drive mechanism of the present utility model.
Fig. 12 is a schematic side view of a spacer of a toothed pulley, a steel belt drive plate of a steel belt drive mechanism of a CVT transmission according to the present utility model.
In the accompanying drawings: 1. an input shaft; 2. a driving conical toothed belt wheel left wheel; 3. a first movable shift sleeve; 4. a first roller; 5. right wheel of driving conical toothed belt wheel; 6. a first spring; 7. a first speed regulating motor; 8. a first drive cam; 9. a first bearing; 10. a first needle bearing; 11. an output shaft; 12. a driven conical toothed belt wheel left wheel; 13. a second movable shift sleeve; 14. a second roller; 15. a driven conical toothed belt wheel right wheel; 16. a second spring; 17. a second speed regulating motor; 18. a second drive cam; 19. a second bearing; 20. a second needle bearing; 21. and a steel belt transmission plate.
Detailed Description
The utility model is further described below with reference to the drawings and specific examples, which are not intended to be limiting.
Referring to fig. 1 to 12, there is shown a toothed pulley, steel belt drive mechanism of a CVT transmission, comprising: an input system, an output system and a steel belt drive plate 21;
the input system includes: the driving gear box comprises an input shaft 1, a driving cone pulley left wheel 2, a first movable gear sleeve 3, a first roller 4, a driving cone pulley right wheel 5 and a first spring 6, wherein the driving cone pulley left wheel 2 is arranged on the input shaft 1, the first movable gear sleeve 3 is sleeved on the input shaft 1 and can slide along the input shaft 1, the driving cone pulley right wheel 5 is sleeved on the first movable gear sleeve 3 and can slide along the first movable gear sleeve 3, one end of the first movable gear sleeve 3 is connected with the first roller 4, the first roller 4 is arranged between the driving cone pulley left wheel 2 and the driving cone pulley right wheel 5, and the first spring 6 is sleeved on the first movable gear sleeve 3;
the input system further includes: the first speed regulating motor 7 and the first transmission cam 8, the first transmission cam 8 is arranged on an output shaft 11 of the first speed regulating motor 7, the central axis of the input shaft 1 is parallel to the central axis of the output shaft 11 of the first speed regulating motor 7, the other end of the first movable speed changing sleeve 3 is propped against the outer edge of the end face of the first transmission cam 8, one end of the first spring 6 is propped against the right wheel 5 of the driving conical pulley, and the other end of the first spring 6 is propped against the end face of the first transmission cam 8;
the output system includes: the output shaft 11, the driven conical pulley left wheel 12, the second movable speed change sleeve 13, the second roller 14, the driven conical pulley right wheel 15 and the second spring 16, wherein the driven conical pulley left wheel 12 is arranged on the output shaft 11, the second movable speed change sleeve 13 is sleeved on the output shaft 11 and can slide along the output shaft 11, the driven conical pulley right wheel 15 is sleeved on the second movable speed change sleeve 13 and can slide along the second movable speed change sleeve 13, one end of the second movable speed change sleeve 13 is connected with the second roller 14, the second roller 14 is arranged between the driven conical pulley left wheel 12 and the driven conical pulley right wheel 15, and the second spring 16 is sleeved on the second movable speed change sleeve 13;
the output system further includes: the second speed regulating motor 17 and the second transmission cam 18, the second transmission cam 18 is installed on the output shaft 11 of the second speed regulating motor 17, the central axis of the output shaft 11 is parallel to the central axis of the output shaft 11 of the second speed regulating motor 17, the other end of the second movable speed changing sleeve 13 is propped against the outer edge of the end face of the second transmission cam 18, one end of the second spring 16 is propped against the right wheel 15 of the driven conical pulley, and the other end of the second spring 16 is propped against the end face of the second transmission cam 18;
the first roller 4 and the second roller 14 are in transmission connection through a steel belt transmission sheet 21, the driving conical pulley left wheel 2 and the driving conical pulley right wheel 5 are both meshed with the steel belt transmission sheet 21, and the driven conical pulley left wheel 12 and the driven conical pulley right wheel 15 are both meshed with the steel belt transmission sheet 21.
Further, in a preferred embodiment, the input system further comprises: a first bearing 9 is mounted between the first movable shift sleeve 3 and the input shaft 1, the first bearing 9.
Further, in a preferred embodiment, the input system further comprises: first needle bearing 10 is mounted between the first movable transmission sleeve 3 and the right driving cone pulley 5.
Further, in a preferred embodiment, the output system further comprises: a second bearing 19 is mounted between the second movable shift sleeve 13 and the output shaft 11, 19.
Further, in a preferred embodiment, the output system further comprises: a second needle bearing 20 is mounted between the second movable transmission sleeve 13 and the driven conical pulley right wheel 15.
Further, in a preferred embodiment, the driving pulley left wheel 2 and the input shaft 1 are keyed and the driven pulley left wheel 12 and the output shaft 11 are keyed.
Further, in a preferred embodiment, the inner ring of the first bearing 9 is connected with the input shaft 1 by interference fit, and the outer ring of the first bearing 9 is slidingly connected with the inner wall of the first movable transmission sleeve 3.
Further, in a preferred embodiment, the inner ring of the first needle bearing 10 is slidably connected to the outer wall of the first movable transmission sleeve 3, and the outer ring of the first needle bearing 10 is interference fit connected to the right driving cone pulley 5.
Further, in a preferred embodiment, the inner race of the second bearing 19 is in interference fit connection with the output shaft 11, and the outer race of the second bearing 19 is in sliding connection with the inner wall of the second movable shift sleeve 13.
Further, in a preferred embodiment, the inner ring of the second needle bearing 20 is slidably coupled to the outer wall of the second movable transmission sleeve 13, and the outer ring of the second needle bearing 20 is interference fit coupled to the driven conical pulley right wheel 15.
The foregoing is merely a preferred embodiment of the present utility model, and is not intended to limit the embodiments and the protection scope of the present utility model.
The present utility model has the following embodiments based on the above description:
in a further embodiment of the utility model, the advantages of infinite transmission ratio, smooth gear shifting, good fuel economy and the like of the CVT in theory are maintained, and meanwhile, the problems of small transmission torque, poor durability and the like caused by the fact that the traditional CVT adopts friction transmission power are overcome due to the fact that the conical toothed belt wheel and the conical toothed steel belt are adopted for transmitting power;
in a further embodiment of the utility model, the mode of changing the transmission diameter of the belt wheel and then changing the transmission ratio by adjusting the position of the steel belt through the electric control cam is adopted, so that the transmission ratio is changed accurately and sensitively compared with the traditional CVT by changing the transmission ratio through changing the diameter of the belt wheel through pressure, and meanwhile, the pressing mechanism of the traditional CVT is omitted, so that the structure is simpler.
In a further embodiment of the utility model, the structure of the main belt pulley and the driven belt pulley is consistent, a conical gear is adopted, and the structure is connected by utilizing a steel belt, so that the load of a speed regulating motor is reduced when the speed is changed;
in a further embodiment of the utility model, the movable gear sleeve cam is designed with rollers, so that the sliding friction between the cam and the steel belt is changed into rolling friction;
in a further embodiment of the utility model, the driving belt is formed by sequentially stacking conical tooth-shaped driving plates and gaskets, and grooves are designed on the sides of the driving plates and the gaskets for installing limit steel belts and assembling the limit steel belts into the driving belt;
in a further embodiment of the utility model, the speed regulating motor rotates the speed regulating sleeve, the cam on the surface of the sleeve drives the transmission steel belt, and the speed change transmission is carried out through the cooperation of the main belt pulley and the auxiliary belt pulley.
In a further embodiment of the utility model, the step-up transmission: the driving belt wheel speed regulating motor drives the speed regulating sleeve to enable the driving belt to be meshed at the outer circle part of the driving belt wheel, and the driven belt wheel speed regulating motor controls the speed regulating sleeve to be far away from the driving belt to enable the speed regulating sleeve to be meshed at the inner circle part of the driven belt wheel.
In a further embodiment of the utility model, the reduction drive: the driving belt wheel speed regulating motor controls the speed regulating sleeve to be far away from the driving belt, so that the speed regulating sleeve is meshed at the inner circle part of the driving belt wheel, and the driven belt wheel speed regulating motor drives the speed regulating sleeve, so that the driving belt is meshed at the outer circle part of the driven belt wheel.
In a further embodiment of the present utility model, the pulley is used as a core component of the CVT, and the deformation of the pulley causes the metal belt to deviate radially along the conical surface of the pulley, so that friction loss is generated in the system, and the transmission efficiency of the speed change mechanism is seriously affected, so that No. 45 steel is selected as a material.
In a further embodiment of the utility model, the pulley cone angle of the steel belt CVT transmission is 11 °.
In a further embodiment of the utility model, the CVT is a mechanism that transmits torque and rotational speed through the tapered surfaces of the metal belt and pulley, and is structurally unique. In the running process of the automobile, a plurality of parts in the automobile, such as gears, can be severely worn, the gears are quenched and tempered by 40MnB, the tooth surface hardness is 250HBW, the contact fatigue limit is 700MPa, and the bending fatigue limit is 600MPa.
In a further embodiment of the utility model, the gear is quenched and tempered by 40MnB, the tooth surface hardness is 250HBW, the contact fatigue limit is 700MPa, and the bending fatigue limit is 600MPa.
In a further embodiment of the present utility model, as shown in fig. 2, the continuously variable transmission is achieved by adjusting the turning radius of the steel belt transmission plate 21 on the first roller 4 and the turning radius of the steel belt transmission plate 21 on the second roller 14 to adjust the transmission ratio of the CVT transmission.
In a further embodiment of the present utility model, as shown in fig. 1, the rotation angle of the first driving cam 8 is adjusted by the first speed regulating motor 7, the first movable speed changing sleeve 3 and the first spring 6 are pushed by the first driving cam 8 to the direction of the left driving cone pulley 2, so that the first movable speed changing sleeve 3 and the right driving cone pulley 5 move along the input shaft 1, the distance between the left driving cone pulley 2 and the right driving cone pulley 5 is adjusted, the distance between the left driving cone pulley 2 and the right driving cone pulley 5 is reduced, the steel belt driving plate 21 is pushed to move towards the periphery, the rotation radius of the steel belt driving plate 21 on the first roller 4 is increased, meanwhile, the rotation angle of the second driving cam 18 is adjusted by the second speed regulating motor 17, the pushing of the second movable speed changing sleeve 13 and the second spring 16 by the second driving cam 18 is canceled, the second movable speed changing sleeve 13 and the right wheel 15 of the driven conical pulley are moved along the output shaft 11, the distance between the left wheel 12 of the driven conical pulley and the right wheel 15 of the driven conical pulley is further adjusted, the distance between the left wheel 12 of the driven conical pulley and the right wheel 15 of the driven conical pulley is increased, the steel belt transmission sheet 21 is moved towards the axis direction of the output shaft 11, the rotating radius of the steel belt transmission sheet 21 positioned on the second roller 14 is reduced, the rotating angle of the first speed regulating motor 7 and the second speed regulating motor 17 is adjustable, the rotating angle of the first transmission cam 8 and the second transmission cam 18 is adjustable, namely, the distance of pushing the first movable speed changing sleeve 3 and the first spring 6 through the first transmission cam 8 and the distance of pushing the second movable speed changing sleeve 13 and the second spring 16 through the second transmission cam 18 are adjustable, stepless speed change adjustment of the CVT transmission is achieved.
In a further embodiment of the present utility model, as shown in fig. 1, the rotation angle of the first driving cam 8 is adjusted by the first speed adjusting motor 7, the pushing of the first driving cam 8 to the first movable speed changing sleeve 3 and the first spring 6 is canceled, the first movable speed changing sleeve 3 and the right driving conical pulley 6 are moved along the input shaft 1, the distance between the left driving conical pulley 2 and the right driving conical pulley 6 is adjusted, the distance between the left driving conical pulley 2 and the right driving conical pulley 6 is increased, the steel belt driving sheet 21 is moved toward the axis direction of the input shaft 1, the rotation radius of the steel belt driving sheet 21 on the first roller 4 is reduced, at the same time, the rotation angle of the second driving cam 18 is adjusted by the second speed adjusting motor 17, the second movable speed changing sleeve 13 and the second spring 16 are pushed toward the left driving conical pulley 12 by the second driving cam 18, the second movable speed changing sleeve 13 and the right wheel 15 of the driven conical pulley are moved along the output shaft 11, the distance between the left wheel 12 of the driven conical pulley and the right wheel 15 of the driven conical pulley is adjusted, the distance between the left wheel 12 of the driven conical pulley and the right wheel 15 of the driven conical pulley is reduced, the steel belt driving piece 21 is pushed to move towards the periphery, the rotating radius of the steel belt driving piece 21 positioned on the second roller 14 is increased, the rotating angle of the first speed adjusting motor 7 and the second speed adjusting motor 17 is adjustable, the rotating angle of the first driving cam 8 and the second driving cam 18 is adjustable, namely the distance between the first movable speed changing sleeve 3 and the first spring 6 is pushed by the first driving cam 8, the distance between the second movable speed changing sleeve 13 and the second spring 16 is pushed by the second driving cam 18, stepless speed change adjustment of the CVT transmission is achieved.
In a further embodiment of the present utility model, a conventional CVT transmission employs a belt drive transmission, and during the shifting process, sliding friction is generated, which results in a slow reaction rate of the transmission, and a long shifting process, particularly in a low temperature environment, which affects the shifting process.
In a further embodiment of the present utility model, the conventional CVT transmission employs a belt drive transmission, and during the shifting process, sliding friction is generated, so as to accelerate wear of the steel belt and the gear teeth, and reduce the service life of the CVT transmission.
In a further embodiment of the utility model, the left driving conical pulley wheel 2, the right driving conical pulley wheel 5, the left driven conical pulley wheel 12 and the right driven conical pulley wheel 15 are conical gears, the included angle of the conical surfaces of the pulleys is 11 degrees, the driving conical pulley wheel can be meshed with the steel belt transmission sheet 21, the meshing of the steel belt transmission sheet 21 and the conical gears can be ensured in the process of pushing the distance between the left driving conical pulley wheel 2 and the right driving conical pulley wheel 6 and the distance between the left driven conical pulley wheel 12 and the right driven conical pulley wheel 15, dislocation and slipping cannot occur, the stability of the speed change process is ensured by adopting a gear tooth meshing mode in the process of changing the transmission ratio of the CVT, the stability of power transmission is ensured, and the reaction rate of the CVT in the speed change process is improved;
in a further embodiment of the utility model, the conical gear and the steel belt transmission sheet 21 are meshed with each other, the stability of power transmission is ensured by a gear tooth meshed transmission mode, meanwhile, the abrasion caused by friction is effectively reduced, and the service life of the CVT transmission is prolonged.
In a further embodiment of the present utility model, the first spring 6 and the second spring 16 are selected to respectively push the right driving conical pulley wheel 5 and the right driven conical pulley wheel 15, instead of the first transmission cam 8 and the second transmission cam 18 directly pushing the right driving conical pulley wheel 5 and the right driven conical pulley wheel 15, so that the first spring 6 and the second spring 16 play a role in reducing radial runout in the operation process of the CVT transmission, and ensure the operation stability of the CVT transmission.
The foregoing is merely illustrative of the preferred embodiments of the present utility model and is not intended to limit the embodiments and scope of the present utility model, and it should be appreciated by those skilled in the art that equivalent substitutions and obvious variations may be made using the description and illustrations of the present utility model, and are intended to be included in the scope of the present utility model.
Claims (10)
1. A toothed pulley, steel belt drive mechanism for a CVT transmission comprising: an input system, an output system and a steel belt transmission sheet (21);
the input system includes: the automatic transmission device comprises an input shaft (1), a driving conical pulley left wheel (2), a first movable transmission sleeve (3), a first roller (4), a driving conical pulley right wheel (5) and a first spring (6), wherein the driving conical pulley left wheel (2) is installed on the input shaft (1), the first movable transmission sleeve (3) is sleeved on the input shaft (1) and can slide along the input shaft (1) in an operable manner, the driving conical pulley right wheel (5) is sleeved on the first movable transmission sleeve (3) and can slide along the first movable transmission sleeve (3), one end of the first movable transmission sleeve (3) is connected with the first roller (4), the first roller (4) is arranged between the driving conical pulley left wheel (2) and the driving conical pulley right wheel (5), and the first spring (6) is sleeved on the first movable transmission sleeve (3);
the input system further comprises: the device comprises a first speed regulating motor (7) and a first transmission cam (8), wherein the first transmission cam (8) is arranged on an output shaft (11) of the first speed regulating motor (7), the central axis of an input shaft (1) is parallel to the central axis of the output shaft (11) of the first speed regulating motor (7), the other end of a first movable speed changing sleeve (3) is propped against the outer edge of the end face of the first transmission cam (8), one end of a first spring (6) is propped against the right wheel (5) of the driving conical toothed belt wheel, and the other end of the first spring (6) is propped against the end face of the first transmission cam (8);
the output system includes: the novel gear box comprises an output shaft (11), a driven conical pulley left wheel (12), a second movable gear box (13), a second roller (14), a driven conical pulley right wheel (15) and a second spring (16), wherein the driven conical pulley left wheel (12) is arranged on the output shaft (11), the second movable gear box (13) is sleeved on the output shaft (11) and can slide along the output shaft (11) in an operable manner, the driven conical pulley right wheel (15) is sleeved on the second movable gear box (13) and can slide along the second movable gear box (13) in an operable manner, one end of the second movable gear box (13) is connected with the second roller (14), the second roller (14) is arranged between the driven conical pulley left wheel (12) and the driven conical pulley right wheel (15), and the second spring (16) is sleeved on the second movable gear box (13);
the output system further includes: the second speed regulating motor (17) and the second transmission cam (18), the second transmission cam (18) is arranged on an output shaft (11) of the second speed regulating motor (17), the central axis of the output shaft (11) is parallel to the central axis of the output shaft (11) of the second speed regulating motor (17), the other end of the second movable speed changing sleeve (13) is propped against the outer edge of the end face of the second transmission cam (18), one end of the second spring (16) is propped against the right wheel (15) of the driven conical toothed belt wheel, and the other end of the second spring (16) is propped against the end face of the second transmission cam (18);
the first roller (4) and the second roller (14) are in transmission connection through the steel belt transmission sheet (21), the driving conical toothed belt wheel left wheel (2) and the driving conical toothed belt wheel right wheel (5) are meshed with the steel belt transmission sheet (21), and the driven conical toothed belt wheel left wheel (12) and the driven conical toothed belt wheel right wheel (15) are meshed with the steel belt transmission sheet (21).
2. The toothed pulley, steel belt drive mechanism of a CVT transmission as in claim 1, wherein the input system further comprises: -a first bearing (9), said first bearing (9) being mounted between said first movable gear sleeve (3) and said input shaft (1).
3. The toothed pulley, steel belt drive mechanism of a CVT transmission of claim 2, wherein the input system further comprises: the first needle bearing (10) is arranged between the first movable speed changing sleeve (3) and the right wheel (5) of the driving conical pulley.
4. The toothed pulley, steel belt drive mechanism of a CVT transmission as in claim 1, wherein the output system further comprises: -a second bearing (19), said second bearing (19) being mounted between said second movable gear sleeve (13) and said output shaft (11).
5. The toothed pulley, steel belt drive mechanism of a CVT transmission as in claim 4, wherein the output system further comprises: and a second needle bearing (20), wherein the second needle bearing (20) is arranged between the second movable speed change sleeve (13) and the right wheel (15) of the driven conical pulley.
6. A toothed pulley, steel belt transmission according to claim 1, characterized in that the driving toothed pulley left wheel (2) and the input shaft (1) are connected by a key, and the driven toothed pulley left wheel (12) and the output shaft (11) are connected by a key.
7. Toothed pulley, steel belt transmission according to claim 2, characterized in that the inner ring of the first bearing (9) is in interference fit connection with the input shaft (1), the outer ring of the first bearing (9) being in sliding connection with the inner wall of the first movable shift sleeve (3).
8. A toothed pulley, steel belt transmission of a CVT transmission according to claim 3, characterized in that the inner ring of the first needle bearing (10) is slidingly connected to the outer wall of the first movable shift sleeve (3), the outer ring of the first needle bearing (10) being in interference fit connection with the right pulley (5) of the driving conical pulley.
9. A toothed pulley, steel belt transmission according to claim 4, characterized in that the inner ring of the second bearing (19) is in interference fit connection with the output shaft (11), and the outer ring of the second bearing (19) is in sliding connection with the inner wall of the second movable shift sleeve (13).
10. The toothed pulley, steel belt drive mechanism of a CVT transmission according to claim 5, characterized in that the inner ring of the second needle bearing (20) is slidingly connected to the outer wall of the second movable shift sleeve (13), and the outer ring of the second needle bearing (20) is in interference fit connection with the driven conical toothed pulley right wheel (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222106073.1U CN219317547U (en) | 2022-08-11 | 2022-08-11 | Toothed belt wheel and steel belt transmission mechanism of CVT transmission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222106073.1U CN219317547U (en) | 2022-08-11 | 2022-08-11 | Toothed belt wheel and steel belt transmission mechanism of CVT transmission |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219317547U true CN219317547U (en) | 2023-07-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222106073.1U Active CN219317547U (en) | 2022-08-11 | 2022-08-11 | Toothed belt wheel and steel belt transmission mechanism of CVT transmission |
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| Country | Link |
|---|---|
| CN (1) | CN219317547U (en) |
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2022
- 2022-08-11 CN CN202222106073.1U patent/CN219317547U/en active Active
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