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gear

A technology of gears and teeth, applied in the body field, can solve the problems of increasing the output of broken dangerous waste products, and achieve the effects of good compactability, good demoldability, and good stability

Active Publication Date: 2018-05-15
MIBA SINTER AUSTRIA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this technology also has its limitations. When the geometry is too complex, there is an increased risk of fracture in thin-walled component areas or components due to the component's attachment to the wall of the die, and thus increased scrap production

Method used

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Embodiment Construction

[0025] At the outset, it should be pointed out that the same reference numerals or the same component designations are used for the same components in different embodiments, wherein the disclosure contained in the entire description can be referred to the components with the same reference numerals or the same component designations. Likewise, selected position indications such as above, below, side, etc. in the description relate to the direct description as well as to the illustrated figures and in the event of a change of position they are automatically transferred to the new position.

[0026] Figures 1 to 4 Different views of a first embodiment of the gear 1 , in particular of the sprocket, are shown.

[0027] according to Figures 1 to 4 Gear 1 is used in a so-called variable valve timing (VVT) system. according to Figures 1 to 4 The gear 1 is especially configured as a stator for a VVT system.

[0028] Such a stator, as described in DE 10 2010 034 014 A1 mentioned...

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Abstract

The invention relates to a method for producing a toothed wheel (1) in net shape or near-net shape quality, in particular a chain wheel, for a VVT system from a powder, with the toothed wheel (1) having an at least approximately cylindrically shaped housing (2) which is delimited in axial direction by one respective end face (6, 7) and which has an outside surface (3), and at the outside surface (3), a toothing (8) having teeth (9) and tooth roots (10) between the teeth (9) is embodied at a distance to both of the end faces (6, 7), and the toothing (8) has a tooth root circle (25) having a tooth root circle diameter, and the powder is filled into a mold (28) and pressed by means of at least one punch, and protrusions (11, 20) are embodied at least in the region of the teeth (9) at the outside surface (3) of the housing (2) and projecting over the latter in radial direction.

Description

technical field [0001] The invention relates to a method for producing gears, in particular sprockets, of net-shape or near-net-shape quality for variable valve timing (VVT) systems from powders, wherein said gears have an at least approximately cylindrical A housing, which is delimited in the axial direction by an end face and has an outer surface on which a toothing with teeth and a tooth base between the teeth is formed at a distance from the two end faces, the teeth The part has a root circle with a root circle diameter, wherein the powder is filled into the die and compacted by means of at least one punch. The invention also relates to a gear wheel, in particular a sprocket wheel, made of powder for a VVT system, wherein the gear wheel has an at least approximately cylindrical housing which is delimited in the axial direction by an end face each and There is an outer surface on which a toothing with teeth and a tooth base between the teeth is formed at a distance from th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H55/30F16H55/17
CPCF16H55/30B22F5/08B22F2998/10F01L1/3442F01L2303/00F16H55/06B22F3/02B22F3/10B22F3/164B22F2003/247
Inventor T·凯瑟尔D·格布哈特
Owner MIBA SINTER AUSTRIA
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