CN-122014816-A - CVT speed change mechanism

Abstract

The invention discloses a CVT speed change mechanism which comprises a driving belt pulley assembly, a driven belt pulley assembly and a driving triangle belt, wherein the driving belt pulley assembly comprises a driving disc and a moving wheel which are coaxially arranged, a box body is arranged on one side of the moving wheel, which is opposite to the driving disc, the box body is connected with a moving shaft in a sliding manner along the axial direction of the moving wheel, a fixed shaft is rotationally connected in the box body, the fixed shaft is in threaded fit with the moving shaft, the box body is connected with a motor for driving the fixed shaft to rotate, a slope plate is arranged between the moving shaft and the moving wheel, a Prussian bead is connected between the slope plate and the moving wheel, and an inclined chute matched with the Prussian bead is arranged on the moving wheel. The problem that CVT variable speed mechanism compatibility is relatively poor among the prior art has been solved to this scheme.

Inventors

• DENG ZHEN
• ZHOU ZHAOQIANG
• SHEN HAIBO
• CHEN SHANGUANG
• LI BO
• LU HAO

Assignees

• 重庆宗申发动机制造有限公司

Dates

Publication Date

20260512

Application Date

20241111

Claims (6)

1. 1. The CVT speed change mechanism comprises a driving belt pulley assembly, a driven belt pulley assembly and a driving triangle belt, wherein the driving belt pulley assembly comprises a driving disc and a moving wheel which are coaxially arranged, a box body is arranged on one side of the moving wheel, which is opposite to the driving disc, the box body is connected with a moving shaft in a sliding manner along the axial direction of the moving wheel, a fixed shaft is rotationally connected in the box body, the fixed shaft is in threaded fit with the moving shaft, and the box body is connected with a motor for driving the fixed shaft to rotate.
2. 2. The CVT transmission according to claim 1, characterized in that a slider is connected between the ramp plate and the moving wheel, and slides in the axial direction of the moving wheel.
3. 3. A CVT shift mechanism according to claim 2, wherein the shift shaft is in rolling engagement with the ramp plate through a deep groove ball bearing.
4. 4. A CVT transmission mechanism according to claim 3 wherein the fixed shaft is drivingly connected to the motor by a gear assembly disposed within the housing.
5. 5. The CVT transmission according to claim 4, characterized in that an oil seal is provided at a mating surface between the movable shaft and the case.
6. 6. The CVT transmission mechanism of claim 5, wherein a support bearing is connected between the outside of the fixed shaft and the housing.

Description

CVT speed change mechanism Technical Field The invention relates to a continuously variable transmission, in particular to a CVT speed change mechanism. Background The CVT transmission mechanism, which is also called a continuously variable transmission mechanism or a continuously variable transmission mechanism, is a transmission device capable of continuously obtaining any transmission ratio in a transmission range. Chinese patent document CN102109032a discloses an electronically controlled V-belt stepless speed change mechanism comprising a V-belt; a driven pulley disk having a fixed portion fixed to the driven pulley disk support shaft and a movable portion axially movable on the driven pulley disk support shaft, the driven pulley disk being driven by the power source, the driven pulley disk being connected to the driven pulley disk and having a fixed portion fixed to the driven pulley disk support shaft and a movable portion axially and rotationally movable on the driven pulley disk support shaft, the driven pulley disk being driven by the driven pulley disk via the V-belt, a pulley disk drive system connected to the driven pulley disk and being adapted to provide power to drive the movable portion of the driven pulley disk to move axially on the driven pulley disk support shaft, the distance of the axial movement being between the fixed portion and the movable portion of the driven pulley disk, and the movable portion of the driven pulley disk being adapted to change in distance of the axial movement of the movable portion of the driven pulley disk on the driven pulley disk support shaft to the driven pulley disk support shaft, the driven pulley disk being adapted to move axially on the driven pulley disk support shaft via the V-belt, a cam housing, at least one of the pulley disk drive system being adapted to change in distance of the axial movement of the driven pulley disk, a pulley disk drive pulley disk, a cam housing being adapted to move on the driven pulley disk drive housing, at least one of the pulley disk drive pulley housing, the cam housing being adapted to move axially, and at least one of the pulley housing being adapted to move the pulley housing, the cam guide groove is arranged between the gear box cover and the cam guide groove of the bearing seat arranged on the movable part of the driving pulley disk so as to guide the bearing seat arranged on the movable part of the driving pulley disk to axially move. The electric control type V-shaped belt stepless speed change mechanism comprises a transmission box base cover, a gear system and a sealing unit, wherein the transmission box base cover is connected with the transmission box base to cover the driving pulley and the driven pulley, the pulley driving system comprises a motor used for providing power, the gear system is arranged between the motor and the driving pulley and used for transmitting the power output by the motor to a movable part of the driving pulley, the lead screw is connected with a bearing seat arranged on the movable part of the driving pulley, and the sealing unit is arranged between a gear box cover and the bearing seat arranged on the movable part of the driving pulley and used for preventing lubricating oil from leaking out of a gear train system adopting wet lubrication. In the prior art, the motor directly drives the outer lead screw and the inner lead screw to drive the sliding pulley to move through the gear mechanism, and the response speed of the motor is high, so that the transmission ratio of the speed change mechanism is easy to switch too fast to generate power transmission fluctuation, the stable speed change performance of the speed change mechanism is reduced, the speed change mechanism is difficult to meet the conventional power transmission requirement, and the speed change mechanism needs to be adjusted through the motor all the time when in use, so that the use complexity of the speed change mechanism is increased, and the use difficulty is increased. Disclosure of Invention The invention aims to provide a CVT speed change mechanism so as to solve the problem of poor compatibility of the CVT speed change mechanism in the prior art. In order to achieve the aim, the basic scheme of the invention provides a CVT speed change mechanism, which comprises a driving belt pulley assembly, a driven belt pulley assembly and a driving triangle belt, wherein the driving belt pulley assembly comprises a driving disc and a moving wheel which are coaxially arranged, one side of the moving wheel, which is opposite to the driving disc, is provided with a box body, a moving shaft is connected with the box body in a sliding manner along the axial direction of the moving wheel, a fixed shaft is rotationally connected in the box body, the fixed shaft is in threaded fit with the moving shaft, the box body is connected with a motor for driving the fixed shaft to rotate, a slope plate is arranged between the moving shaft