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High-power flat saw with blade shaft drive

A high-power, saw blade shaft technology, applied in the direction of sawing machine devices, metal sawing equipment, manufacturing tools, etc., can solve problems such as piston power pulses

Pending Publication Date: 2018-09-28
HUSQVARNA AB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This problem is more common when the belt is aged, stretched and / or worn, for example when using an internal combustion engine with only one or two cylinders, due to the noticeable power pulse of the pistons caused by the engine running
Different loads are applied to the saw blade as it cuts the material, which further leads to the above problems

Method used

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  • High-power flat saw with blade shaft drive
  • High-power flat saw with blade shaft drive
  • High-power flat saw with blade shaft drive

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Embodiment Construction

[0022] The disclosed embodiments will be described more fully hereinafter with reference to the accompanying drawings, which illustrate certain embodiments of the invention. Like reference numerals refer to like parts throughout.

[0023] figure 1 A perspective view of a high powered table saw 10 is shown, according to one embodiment. The table saw 10 includes a motor 11, preferably an internal combustion engine 11, having a rated power output greater than 25 horsepower (18.6 kW) and including one to four cylinders. The internal combustion engine 11 is configured to operate between approximately 1000 RPM and 4000 RPM, preferably reaching its peak torque and power at approximately 3000 RPM to 3600 RPM. The industry standard rotational speed of internal combustion engines must be considered. Motor 11 may also be an electric motor 11 configured to achieve a power output of at least 25 horsepower (18.6 kW). The electric motor may be, for example, a brushless DC motor, a switch...

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Abstract

High-power flat saw (10) having a large diameter saw blade (12), the flat saw (10) comprising a motor (11) and a blade shaft drive (1), wherein the blade shaft drive (1) comprises a first pulley (2) and a second pulley (3) and a belt (6), the second pulley (3) being directly connected to a blade shaft (9), the first pulley (2) having a smaller diameter than the diameter of the second pulley (3), and wherein the blade shaft drive (1) further comprises a variable belt tensioner (4) arranged to apply a variable force to the belt (6).

Description

technical field [0001] The teachings herein relate to table saws, and more particularly to blade shaft drives for high powered table saws having large diameter saw blades. Background technique [0002] Side saws are commonly used for cutting concrete and asphalt. Side saws typically use an internal combustion engine or an electric motor to power the blade and propel the entire saw. To transmit the power from the motor to the saw blade, belt drive technology is usually used. The saw blade is a circular saw blade that rotates and a common rule of thumb for effective sawing performance is that the blade should rotate such that the periphery of the blade travels at an optimum design speed or no more than about 65m / s. This is the design standard for many saw blades. Since table saws are designed to operate with a certain blade diameter, or at least a range of blade diameters, the transmission ratio of the belt drive from the motor to the blade meets the above criteria. Howeve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23D47/12B23D45/00B28D1/04
CPCB23D47/12B28D1/045B23D45/006
Inventor 约翰·桑德瓦尔
Owner HUSQVARNA AB