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Method for manufacturing multi-stage gear, and multi-stage gear

A multi-gear, manufacturing method technology, applied to gears, elements with teeth, belts/chains/gears, etc., can solve problems such as the problem of not being able to cope with space saving, achieve low-cost coaxial precision, and ensure precision , the effect of reducing costs

Active Publication Date: 2014-02-26
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the gap 303 is molded, it cannot respond to the space-saving problem that is constantly pursued in the industry of automobiles that are mainly used, so it becomes a problem.

Method used

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  • Method for manufacturing multi-stage gear, and multi-stage gear
  • Method for manufacturing multi-stage gear, and multi-stage gear
  • Method for manufacturing multi-stage gear, and multi-stage gear

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0052] (Overall structure of multiple gears)

[0053] figure 1 A schematic sectional view of the multi-stage gear 1 is shown. The multiple gear 1 is made of a plastically deformable metal or the like in the manufacturing method of the multiple gear described later. figure 1 The multiple gear 1 shown has a substantially hollow cylindrical shape with a central hole 14 formed in its center. A small-diameter gear 11 is formed at the center of the outer circumference of the multi-stage gear 1 . Further, large-diameter gears 12 and 13 are formed on the upper and lower outer peripheries of the small-diameter gear 11 in the axial direction.

[0054] exist figure 1 In the above, the large-diameter gears 12 and 13 are provided on the upper and lower outer peripheries in the axial direction of the small-diameter gear 11 , but they may be provided on either the upper or lower outer peripheries in the axial direction of the small-diameter gear 11 . For example, it can also become ...

no. 2 approach

[0090] Compared with the method for manufacturing a multi-stage gear according to the first embodiment, the method for manufacturing a multi-stage gear according to the second embodiment includes the second step of forming a large-diameter gear portion by plastically deforming the end portion of the workpiece to expand its diameter. Except for the second process and the fourth process, there is no difference. Therefore, in the second embodiment, a method of plastically deforming the end portion 41 of the workpiece 40 will be described, and other descriptions will be omitted. In addition, although other description is omitted in 2nd Embodiment, it has the same operation|movement and effect as 1st Embodiment. In addition, although only the second step is described, the plastic deformation of the workpiece in the second step also exerts the same effect in the fourth step by the same structure.

[0091] (second process)

[0092] The second step is a step for forming the large-di...

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PUM

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Abstract

The present invention addresses the problem of providing a method for manufacturing a multi-stage gear for which there is no gap between a small-diameter gear and a large-diameter gear, and addresses the problem of providing this multi-stage gear. This method manufactures a multi-stage gear by forming gears having different diameters on the outer circumferential surface of a hollow cylindrical member to be processed, and has a first step wherein a small-diameter gear is formed on the outer circumferential surface, a second step wherein the ends of the member to be processed undergo plastic deformation and the diameters thereof are enlarged to form large-diameter gear parts, and a third step wherein large-diameter gears are formed by cutting the large-diameter gear parts.

Description

technical field [0001] The present invention relates to a method for manufacturing a multi-stage gear and a multi-stage gear formed by forming gears with different diameters on the outer peripheral surface of a hollow cylindrical processed member, and the multi-stage gear. Background technique [0002] Multiple gears are components in which large-diameter gears and small-diameter gears with different diameters are provided on the outer peripheral surface of the processed component. Multiple gears are used as pinion or sun gears mainly used in transmissions of automobiles. Specifically, it is used in gears for other engines in transmissions such as AT vehicles, MT vehicles, and CVTs. [0003] Figure 11 The multi-stage gear 300 of patent document 1 related to the prior art is shown. Such as Figure 11 As shown, the multiple gear 300 has a small-diameter gear 301 and a large-diameter gear 302 , and a center hole 304 is formed at the center thereof. Furthermore, a gap 303 is...

Claims

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Application Information

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IPC IPC(8): F16H55/17B21H5/00B21H5/02B23P15/14
CPCF16H55/02F16H55/17B21K1/30B23P15/14B21H5/02B21H1/02Y10T74/1987Y10T29/49476B23F1/00
Inventor 助田拓也井下宽史霜田好司富冈晃德增井稔明青山宏典
Owner TOYOTA JIDOSHA KK