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Automatic gear for vehicle

An automatic transmission device and vehicle technology, which is applied in the direction of vehicle gearboxes, transmission parts, chain/belt transmissions, etc., can solve the problems of reduced driving performance, increased weight of power drive devices, and reduced fuel efficiency.

Inactive Publication Date: 2007-07-11
YAMAHA MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Also, since the hydraulic pumps that generate the hydraulic pressure must be driven by the engine, a portion of the engine power is used to drive the pumps, reducing fuel efficiency
Moreover, since the output power of a motor scooter engine is smaller than that of a car engine, increasing the power drive unit results in an increase in weight, which also reduces drive performance

Method used

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  • Automatic gear for vehicle
  • Automatic gear for vehicle
  • Automatic gear for vehicle

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Embodiment Construction

[0043] The vehicle automatic transmission device according to the first embodiment of the present invention will be described in detail below with reference to FIGS. 1-6 . Here, the vehicle automatic transmission of the present invention is applied to a scooter.

[0044] Fig. 1 is a side view of a small motorcycle installed with a vehicle automatic transmission device according to a first embodiment of the present invention; Fig. 2 is an enlarged cross-sectional view of a drive wheel part of a unit swing type power drive unit; Fig. 3 is a unit swing type power drive unit Figure 4 is a cross-sectional view of a dry belt; Figure 5 is a cross-sectional view taken along the V-V line in Figure 4; Figure 6 is an axial moment and slip coefficient relationship diagram between.

[0045] In these figures, reference numeral 1 denotes the scooter of this embodiment. Motorcycle 1 adopts the structure that rear wheel 2 is driven by unit swing type power drive unit 3 . In Fig. 1, the refe...

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PUM

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Abstract

A vehicle transmission, comprising a drive pulley, a follower pulley, and an annular-shaped dry belt wrapped around the drive pulley and the follower pulley, wherein the driving pullery has a resting wheel and a traction wheel made from alumunium alloy, the dry belt comprises a plurality of elements and rings around the drive pulley and the follower pulley. The elements are made fromm synthetic resin which are coupled with one another by the rings. Thereby a vehicle transmission with small size that can improve the transmitting driving force by properly cooling the dry belt.

Description

【Technical field】 [0001] The present invention relates to an automatic transmission mounted on, for example, a small motorcycle, and more particularly, the present invention relates to a belt transmission using a resin belt for a motorcycle equipped with a small displacement engine. 【Background technique】 [0002] Generally, an automatic transmission of a motorcycle such as a scooter is installed in a gearbox of a unit swing type power drive unit. An automatic transmission includes a drive pulley mounted on a crankshaft of an engine, a driven pulley mounted on an output shaft on a rear wheel side, and a V-belt extending between and around these two pulleys. Each of the drive pulley and the follower pulley is composed of a stationary pulley that cannot move in its axial direction and a drive pulley that can move in the axial direction. [0003] In this automatic transmission, the diameter of the V-belt's lap contact is changed by a speed change mechanism provided on a drive ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16G5/16B62M9/12B29D29/08B62M7/12B62M9/02F02B61/02F16H57/04
CPCF16H57/0489B62M9/02B29D29/08F16H57/0415B62M7/12F16G5/166F02B61/02
Inventor 井坂义治
Owner YAMAHA MOTOR CO LTD