Motorcycle CVT (continuously variable transmission) with starting and low-speed torque increasing device

Abstract

The utility model relates to the technical field of motorcycle transmissions, in particular to a motorcycle CVT (continuously variable transmission) with a starting and low-speed torque increasing device, which comprises a driving wheel shaft, a CVT driving wheel, a driven wheel shaft, a CVT driven wheel, a driving belt, an auxiliary driving wheel, an auxiliary driven wheel and an auxiliary driving chain. According to the technical scheme, the one-way auxiliary driving wheel is additionally arranged on the driving wheel shaft, the auxiliary driven wheel is additionally arranged on the driven wheel shaft, and the auxiliary driving chain is used for driving, so that the one-way auxiliary driving wheel and the auxiliary driven wheel are driven by the one-way auxiliary driving wheel and the auxiliary driven wheel during starting or low speed. The auxiliary driving wheel on the driving wheel shaft drives the auxiliary driven wheel on the driven wheel shaft, the CVT driving wheel on the driving wheel shaft drives the CVT driven wheel on the driven wheel shaft, the two sets of transmission systems work at the same time, and torque output during starting or low speed is increased.

Description

TECHNICAL FIELD

[0001] The utility model relates to motorcycle transmission technical field, concretely relates to a motorcycle CVT transmission with starting, low speed torque increasing device. BACKGROUND

[0002] With the requirement of travel efficiency, motorcycle market demand grows unceasingly. At present, the CVT transmission of most pedal motorcycles or electric motorcycles is adopted, and the existing motorcycle CVT transmission adopts centrifugal type, and the clutch composed of clutch flinger and bowl bow is located at the rear end of transmission case, when the motorcycle starts, the clutch flinger and bowl bow part are in the separated state, only when the motorcycle speed improves, the clutch flinger and bowl bow part are in the combined state under the centrifugal force, since the transmission technology of the existing motorcycle at starting and low speed is relatively weak in the case of bearing large torque, the transmission may slip under the condition of starting or low speed, which influences the motorcycle performance and safety. SUMMARY

[0003] The utility model discloses in view of the defects of prior art, propose a kind of motorcycle CVT transmission with starting, low speed torque increasing device, reduce the current motorcycle CVT transmission in the case of starting or low speed bearing large torque aspect relatively weak, still appear transmission slip defect under the condition of sudden acceleration.

[0004] To achieve the above object, the patent technical scheme, a kind of motorcycle CVT transmission with starting, low speed torque increasing device, including driving wheel shaft, CVT driving wheel, driven wheel shaft, CVT driven wheel and drive belt, the CVT driving wheel includes right conical disc, left conical disc and reset spring, the right conical disc is fixedly connected in the right section of the driving wheel shaft, the left conical disc is movably sleeved in the left section of the driving wheel shaft, the reset spring is clamped between the right conical disc and left conical disc, the CVT driven wheel is arranged on the driven wheel shaft, the drive belt is clamped between the CVT driving wheel and CVT driven wheel and transmits power;It also includes auxiliary driving wheel, auxiliary driven wheel and auxiliary drive chain, the auxiliary driving wheel is unidirectionally fixed in the driving wheel shaft in forward direction, is located in the side of the CVT driving wheel, the auxiliary driven wheel is fixed on the driven wheel shaft, is located in the side of the CVT driven wheel, with the auxiliary driving wheel same side, the auxiliary drive chain transmits the power of the auxiliary driving wheel to the auxiliary driven wheel.

[0005] The auxiliary drive chain is V-shaped belt or chain. When the auxiliary driving wheel and the auxiliary driven wheel adopt gears, the auxiliary drive chain adopts chain; when the auxiliary driving wheel and the auxiliary driven wheel adopt pulleys, the auxiliary drive chain adopts V-shaped belt.

[0006] Further, the auxiliary driving wheel is located on the left side of the CVT driving wheel, the auxiliary driven wheel is located on the left side of the CVT driven wheel, and the auxiliary driving wheel is a wet type wheel. The unidirectional auxiliary driving wheel in the forward direction and the drive chain work in lubricating oil, the friction coefficient and wear are reduced through the oil film, and the transmission efficiency is improved.

[0007] In addition, the auxiliary driving wheel can also be limited to be located on the right side of the CVT driving wheel, the auxiliary driven wheel is located on the right side of the CVT driven wheel, and the auxiliary driving wheel is a dry type wheel. The drive chain is smeared with lubricating oil to prevent overheating or wear, and the transmission efficiency is improved.

[0008] Further, the auxiliary drive chain is V-shaped belt or chain. When the auxiliary driving wheel and the auxiliary driven wheel adopt gears, the auxiliary drive chain adopts chain; when the auxiliary driving wheel and the auxiliary driven wheel adopt pulleys, the auxiliary drive chain adopts V-shaped belt.

[0009] The motorcycle CVT transmission with the starting and low-speed torque increasing device adopts the above technical scheme, increases a dry or wet one-way auxiliary driving wheel on the driving wheel shaft and a dry or wet auxiliary driven wheel on the power output shaft, and uses a driving chain (chain or belt) to drive, in the starting or low-speed process of the D gear (forward gear), the L gear (low-speed gear) and the R gear (reverse gear), the dry or wet auxiliary driving wheel on the driving wheel shaft and the CVT driving wheel drive the dry or wet auxiliary driven wheel on the power output shaft and the CVT driven wheel to work at the same time, and help to increase the torque output in the starting or low-speed process; the dry or wet one-way auxiliary driving wheel is locked according to the direction of the input power in the starting and low-speed process, the dry or wet one-way auxiliary driving wheel and the CVT driving wheel work at the same time, and ensure the smooth transmission of the power, when the vehicle speed reaches a certain value, the dry or wet one-way auxiliary driving wheel is unlocked by the following mechanism, so that it does not provide additional power. The energy saving and wear reduction effects are realized. The cooperative work of the dry or wet one-way auxiliary driving wheel and the CVT driving wheel can also reduce the phenomenon of the slip of the CVT driving wheel belt. The belt slip usually occurs when the friction between the belt and the CVT driving wheel or the CVT driven wheel is insufficient. When the dry or wet one-way auxiliary driving wheel works, additional friction can be provided to help maintain the close contact between the belt and the CVT driving wheel and the CVT driven wheel, thereby reducing the possibility of slip. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 is the auxiliary driving wheel and the auxiliary driven wheel adopt the wet type wheel, the structure assembly schematic view of the utility model;

[0011] Figure 2 is the auxiliary driving wheel and the auxiliary driven wheel adopt the dry type wheel, the structure assembly schematic view of the utility model. DETAILED DESCRIPTION

[0012] In order to make the technical means, creative features, purposes and effects realized by the utility model easy to understand, the utility model is further described below in combination with the drawings and specific embodiments. Embodiment one:

[0013] As Figure 1As shown, a motorcycle CVT transmission with a starting and low-speed torque-increasing device includes a drive shaft 1, a CVT drive pulley, a driven shaft 2, a CVT driven pulley 21, and a drive belt 3. The CVT drive pulley includes a right conical disc 11, a left conical disc 12, and a return spring 13. The right conical disc 11 is fixedly connected to the right section of the drive shaft 1, and the left conical disc 12 is movably sleeved on the left section of the drive shaft 1. The return spring 13 is clamped between the right conical disc 11 and the left conical disc 12. The CVT driven pulley 21 is disposed on the driven shaft 2, and the drive belt 3 is clamped on the CVT drive pulley. The system transmits power between the CVT driven wheel 2 and the CVT driven wheel 2; it also includes an auxiliary drive gear 41, an auxiliary driven gear 51, and an auxiliary drive chain. The auxiliary drive gear 41 is fixed in one direction on the drive wheel shaft 1 and is located on the left side of the CVT drive wheel. The auxiliary driven gear 51 is fixed on the driven wheel shaft 2 and is located on the left side of the CVT driven wheel. The auxiliary drive chain is a chain 61, which transmits the power of the auxiliary drive gear 41 to the auxiliary driven gear 51. The auxiliary drive gear 41 is a wet wheel, and the auxiliary drive gear 41 and the chain 61 operate in lubricating oil. Example 2:

[0014] like Figure 2 As shown, a motorcycle CVT transmission with a starting and low-speed torque-increasing device includes a drive shaft 1, a CVT drive pulley, a driven shaft 2, a CVT driven pulley 21, and a drive belt 3. The CVT drive pulley includes a right conical disc 11, a left conical disc 12, and a return spring 13. The right conical disc 11 is fixedly connected to the right section of the drive shaft 1, and the left conical disc 12 is movably sleeved on the left section of the drive shaft 1. The return spring 13 is clamped between the right conical disc 11 and the left conical disc 12. The CVT driven pulley 21 is disposed on the driven shaft 2, and the drive belt 3 is clamped between the CVT drive pulley and the CVT drive pulley. The CVT driven pulley 2 transmits power between itself; it also includes an auxiliary driving pulley 42, an auxiliary driven pulley 52, and an auxiliary drive chain. The auxiliary driving pulley 42 is fixed in one direction on the driving pulley shaft 1 and is located on the right side of the CVT driving pulley. The auxiliary driven pulley 52 is fixed on the driven pulley shaft 2 and is located on the right side of the CVT driven pulley. The auxiliary drive chain is a V-belt 62, which transmits the power from the auxiliary driving pulley 42 to the auxiliary driven pulley 52. ​​The auxiliary driving pulley 42 is a dry pulley, and lubricant can be applied to the V-belt 62.

[0015] The description of the specific embodiments is only used to help understand the method and the core idea of the utility model, and it should be pointed out that the above description is only the preferred specific implementation of the utility model, and for ordinary skilled in the art, without departing from the principle of the utility model, the utility model can be improved and modified in several ways, and these improvements and modifications will also fall within the protection scope of the utility model claims.

Claims

1. A motorcycle CVT transmission with starting and low-speed torque increasing device, comprising a driving wheel shaft, a CVT driving wheel, a driven wheel shaft, a CVT driven wheel and a driving belt, the CVT driving wheel comprising a right conical disc, a left conical disc and a reset spring, the right conical disc being fixedly connected to a right section of the driving wheel shaft, the left conical disc being movably sleeved on a left section of the driving wheel shaft, the reset spring being clamped between the right and left conical discs, the CVT driven wheel being arranged on the driven wheel shaft, the driving belt being clamped between the CVT driving wheel and the CVT driven wheel to transmit power; characterized in that: The auxiliary driving wheel is located on the left side of the CVT driving wheel, the auxiliary driven wheel is located on the left side of the CVT driven wheel, and the auxiliary driving wheel is a wet wheel.

2. A motorcycle CVT transmission with a start, low speed torque increasing device according to claim 1 characterized in that: The auxiliary driving wheel is located on the right side of the CVT driving wheel, the auxiliary driven wheel is located on the right side of the CVT driven wheel, and the auxiliary driving wheel is a dry wheel.

3. A motorcycle CVT transmission with a start, low speed torque increasing device according to claim 1 characterized in that: The auxiliary driving wheel is located on the right side of the CVT driving wheel, the auxiliary driven wheel is located on the right side of the CVT driven wheel, and the auxiliary driving wheel is a dry wheel.

4. A motorcycle CVT transmission with a start, low speed torque increasing device according to claim 1 characterized in that: The auxiliary driving wheel and the auxiliary driven wheel are gear wheels, and the auxiliary driving chain is a chain.

5. A motorcycle CVT transmission with a start, low speed torque increasing device according to claim 1 characterized in that: The auxiliary driving wheel and the auxiliary driven wheel are pulleys, and the auxiliary driving chain is a V-shaped belt.

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