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A segment for a camshaft and its manufacture

A technology of camshafts and segments, which is applied to camshaft drives, cams, couplings, etc., can solve the problems of time-consuming and high manufacturing costs, and achieve the effects of high precision, cheap manufacturing, and easy manufacturing process

Inactive Publication Date: 2018-10-23
OVAKO SWEDEN AB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Of these, solid camshafts generally provide a more durable design for high load applications, but are more expensive and time consuming to manufacture

Method used

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  • A segment for a camshaft and its manufacture
  • A segment for a camshaft and its manufacture
  • A segment for a camshaft and its manufacture

Examples

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Embodiment Construction

[0038] Before the present invention is disclosed and described in detail, it is to be understood that this invention is not limited to the particular configurations, method steps, substrates and materials disclosed herein as such may vary. It is also to be understood that the terminology used herein is for the purpose of describing particular embodiments only and not intended to be limiting, since the scope of the present invention will be limited only by the appended claims and the equivalents thereof.

[0039] It must be noted that, as used in this specification and the appended claims, the singular forms "a," "an," and "the" include plural referents unless the context clearly dictates otherwise.

[0040] Unless otherwise defined, any terms and scientific terms used herein are intended to have the meaning commonly understood by one of ordinary skill in the art to which this invention belongs.

[0041] Deviations represent cavities or indentations on the interior portion of a...

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Abstract

A segment (10; 20; 30) adapted to be mounted on a shaft (2) to form a camshaft (1), wherein the segment comprises a through hole (11) adapted to receive the shaft, and wherein the shape of the hole inthe segment is adapted to the cross section of the shaft in such a way that when mounted, the segment has a strain causing it to exert a radial load on the shaft in at least two contact points (12a,12b), wherein an inner surface (12) of the hole has at least one deviation (13; 14) to create at least three contact points (12a; 13a, 13b; 14a, 14b) between the segment and the shaft, and wherein theat least three contact points are non-uniformly distributed about the circumference of the hole. Advantages include that the camshaft can be made lightweight, with less difficulties and at a lower cost as well as with increased precision in angular positioning of the segment on the shaft.

Description

technical field [0001] The present invention relates generally to segments of camshafts and methods of manufacture thereof, and more particularly to the securing of segments, such as cam lobes, on camshafts. Background technique [0002] Generally, camshafts and their manufacture are well known in the art. Two types of camshaft designs dominate the market: solid camshafts and modular camshafts. Of these, solid camshafts generally offer a more durable design for high-load applications, but are more expensive and time-consuming to manufacture. Modular camshafts are more cost-effective as they provide a lightweight solution and facilitate high-volume production. However, the cam lobes and other segments on a modular camshaft must be fixed to the shaft with a certain degree of precision. [0003] EP0282166 discloses a camshaft having an odd number of lobes on the inside of the lobes in contact with the shaft towards the shaft. Reference numbers in paragraphs refer to the dra...

Claims

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Application Information

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IPC IPC(8): F01L1/047F16D1/08F16H53/02B21D53/84
CPCB21D53/845F01L1/047F01L2001/0471F01L2250/02F16D1/0858F16H53/025F01L2301/00F01L2301/02F01L2303/00
Inventor N·本施泰特E·克雷森
Owner OVAKO SWEDEN AB