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BELT TENSION SETTING TOOL

IP.com Disclosure Number: IPCOM000247143D
Publication Date: 2016-Aug-10
Document File: 5 page(s) / 338K

Publishing Venue

The IP.com Prior Art Database

Abstract

Belts are very common components in many mechanical systems in which power is transmitted from one pulley to another. It is required to be assembled at correct tension which is, the lowest tension at which belt does not slip at highest load. In current design, Tension of belt can be adjusted by using a tool which varies the position of movable pulley.

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Page 01 of 5

TITLE: BELT TENSION SETTING TOOL

INTRODUCTION

Background/ Problem

Belts are very common components in many mechanical systems in which power is transmitted from one pulley to another. It is required to be assembled at correct tension which is, the lowest tension at which belt does not slip at highest load.

Belt when assembled at high tension increases wear & tear of belt & parts attached to it (ex. fan, alternator etc.) whereas when belt is assembled at low tension it slips during operation resulting in loss of power.

Belt tension for similar belts installed at same CD (center distance) can vary. This is due to length variations, material variations etc. which are inherent to its design. Hence tension needs to be adjusted by moving the movable pulley towards or away from the fixed pulley to achieve required tension.

Currently a torque wrench at a set torque is used like a crowbar to pull the alternator outwards. The alternator is pulled till limiting torque on wrench. Operator is then required to maintain the wrench position & while doing so also tight Bolt 3 so as to fix the alternator position.

Limitations: Operator need to hold the wrench at required belt tension in one hand & tighten bolt to fix alternator position from other. There are chances of belt loosening if operator does not maintain the required force. After this tension need to be checked. If tension is above or below the required tension the process needs to be repeated again.


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1. Proposed Design/ Solution


1.1 Construction:

Locator block has two locating pins. These pins engage in geometrical feature of fixed component which is used as reference to pull the movable pulley.

Puller screw is engaged in eye bolt. Eye bolt can rotate on its axis.

Puller block has a pin which is engaged in slot in movable pulley. When puller screw is rotated puller block moves towards locator lock.


Page 03 of 5

Example:

Alternator fan belt setting

By this arrangement, we can fix a movable pulley (by moving it in or out) at such a position where desired be...