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Method using powder metallurgy to manufacture a dog ring gear

一种齿式、截面的技术，应用在齿轮变速机构、车轮、相互啮合的离合器等方向，能够解决不能实现高质量的齿式离合器、有害毛刺等问题

Inactive Publication Date: 2012-09-26
SINTERTECH OF TOUR MANHATTAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A disadvantage of such a forming operation can be the formation of unwanted burrs at the junction between the two mold halves (i.e. the junction between the front and rear of the teeth)
The presence of this burr cannot achieve a high quality dog ​​clutch

Method used

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  • Method using powder metallurgy to manufacture a dog ring gear
  • Method using powder metallurgy to manufacture a dog ring gear
  • Method using powder metallurgy to manufacture a dog ring gear

Examples

Experimental program
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Embodiment Construction

[0041] For the sake of clarity, only those parts that are helpful to the understanding of the invention are shown and described. In particular, the manufacture of the ring bearing the teeth is not described in detail, the invention being compatible with the usual methods for manufacturing such rings. Also, the terms lateral, longitudinal, central, etc. in the drawings are used to describe directions arbitrarily unless otherwise specified.

[0042] The present invention provides a ring formed by compression, sintering and alignment having teeth with a slightly rounded intersection between their front and rear (to dampen angles) to provide a minimal transition zone during tooth clutching. The teeth to be formed are provided with the largest possible overlapping length.

[0043] Figure 4 is a partial perspective view of an embodiment of the toothed ring 30 . In the example, the teeth are symmetrical with respect to the central longitudinal plane and are formed on all or part ...

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PUM

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Abstract

The invention relates to a method for manufacturing a dog ring gear (30), each dog (32) being made up of a front portion and a rear portion, said method including the following steps: forming, by means of compression and sintering, a ring gear with dog preforms (50) extending on all or part of the periphery thereof; and calibrating the sintered ring gear in a die including a front die half (64) and a rear die half (62), intended for engaging at the junction between the front and rear portions of the dogs, the thickness (A) of a rear portion (BP) of each preform, in the original plane of the dogs, being greater than the narrowest section (S1) of a groove (66) formed in the rear die half and smaller than the thickest section (S2) of said groove, in said plane.

Description

technical field [0001] The invention relates to a sintered tooth clutch ring of the type used in transmissions, and to a method of manufacturing the sintered tooth clutch ring. Background technique [0002] The transmission comprises a number of components which change their position during a gear shift so that the output axis of the transmission has a torque suitable for the resistance to motion. Such transmissions are especially provided for use in the automotive sector. [0003] Conventional transmissions include, inter alia, dog clutch rings firmly attached to idler gears (welded or shrink-fitted onto these gears) and intended to be driven in a rotating star with a sliding sleeve or via the transmission's rod Combiner fit. This engagement is achieved after a step of equalization of speed between the rod and the idler, by including a locking step between the teeth of the toothed ring and the teeth of the sliding sleeve. [0004] Figure 1A to Figure 1D A front view, a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21K1/30F16D23/02
CPCF16D11/00F16D2011/008B21K1/30F16D2250/00B22F3/12
Inventor 文森特·博纳富瓦让-吕克·埃布鲁萨尔
Owner SINTERTECH OF TOUR MANHATTAN