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Belt CVT

A continuously variable transmission, pulley technology, applied in the direction of transmission belts, belts/chains/gears, transmissions, etc., can solve the problems of the impact and reduction of the durability of metal elements or metal ring aggregates, to prevent contact surface pressure, reduce The effect of small deviations

Active Publication Date: 2018-11-02
HONDA MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, although the above-mentioned conventional technology can compensate the deviation of the metal strip, on the other hand, as described in detail in the detailed description of the present specification, there is the following problem: in the case where the winding diameter of the metal strip is large In the region, a large gap is created between the V-face of the pulley and the radially outer end of the pulley abutment face of the metal element
If such a gap occurs, the left and right outer ends of the metal ring assembly supported on the saddle surface of the metal element protrude to the gap, and the contact area between the saddle surface and the metal ring assembly will decrease accordingly, thereby, Increased contact surface pressure may adversely affect the durability of metal elements or metal ring assemblies

Method used

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  • Belt CVT
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no. 1 Embodiment approach

[0057] Below, based on Figure 1 to Figure 11 A first embodiment of the present invention will be described.

[0058] Such as figure 1 As shown, a belt-type continuously variable transmission T for a vehicle includes a drive shaft 11 and a driven shaft 12 arranged in parallel, and a crankshaft 13 of an engine E is connected to the drive shaft 11 via a damper 14 .

[0059] The drive pulley 15 supported on the drive shaft 11 includes: a fixed-side pulley half 15a relatively rotatable with respect to the drive shaft 11; Side pulley half body 15b. The groove width between the movable side pulley half body 15b and the fixed side pulley half body 15a is variable by the hydraulic pressure applied to the hydraulic oil chamber 16 . The driven pulley 17 supported on the driven shaft 12 includes: a fixed-side pulley half 17a fixed to the driven shaft 12; and a movable-side pulley half 17b opposite to the fixed side pulley. The wheel half body 17a can slide freely in the axial directi...

no. 2 Embodiment approach

[0096] In the first embodiment, the first arc portion A1 and the second arc portion A2 constituting the element-side curved portion 49c intersect at a sharp corner (see Figure 8 ), therefore, stress concentration may occur in this part. exist Figure 12 In the shown second embodiment, the first arc portion A1 and the second arc portion A2 are connected by the connecting portion A3 composed of a smooth curve, which prevents intersections at sharp corners, thereby avoiding the sharp corners. Stress concentration occurs at the corners.

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Abstract

According to the present invention, there is provided a belt type continuously variable transmitter in which a pulley and a metal element are brought into contact with each other and in contact with a metal element according to a winding diameter of a metal belt, and when the winding diameter of the metal strip is large, the gap between the radially outer ends of the pulley abutment is suppressed to a minimum. The element-side curved portion of the metal element capable of abutting the pulley-side curve portion of the V-side of the pulley includes a first circular arc portion having a small diameter and a second circular arc portion having a large diameter, and in the at least one speed ratio, the first The arc portion and the second circular arc portion are in contact with the pulley side curve portion at the two abutting points at the same time. In this way, it is possible to prevent the contact point of the first circular arc portion from being displaced radially inward on the element-side curved portion when the metal belt is moved radially outwardly, which not only suppresses the gap to be smallest possible, but also disperses the load between the pulley side curve portion and the element side curve portion to two contact points, thereby preventing excessive contact surface pressure.

Description

technical field [0001] The present invention relates to a belt-type continuously variable transmission, which comprises: a drive pulley composed of a fixed pulley half and a movable pulley half; a drive pulley composed of a fixed pulley half and a movable pulley half a driven pulley; and a metal belt wound on the V surface of the driving pulley and the V surface of the driven pulley, the metal belt being formed by supporting a plurality of metal elements on a metal ring assembly. The transmission ratio is changed by increasing the groove width of one of the driving pulley and the driven pulley and decreasing the groove width of the other. Background technique [0002] In this belt-type continuously variable transmission, a technology is known according to the following patent document 1: the radially inner part and the outer part of the V surface of the fixed-side pulley half of the pulley are composed of straight lines and curved lines, respectively, and, The radially oute...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H9/12F16G1/28
CPCF16G1/28F16H9/125
Inventor 隅田聪一朗矢崎徹
Owner HONDA MOTOR CO LTD