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Portable handheld circular saw

A portable circular saw, hand-held technology, applied in the direction of portable motorized circular saws, circular saws, sawing equipment, etc., can solve the problem of damage to rail saw blades, and achieve the effect of preventing injuries

Active Publication Date: 2013-12-04
SUMEC HARDWARE & TOOLS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, hand-held portable circular saws with plunge-feeding, when the rotating saw blade cuts into the workpiece, there will be a sudden and violent reverse motion or rebound, which will cause the circular saw to fly away from the workpiece and the guide rail and fly towards the user, and will also Damage to guide rail or / and saw blade

Method used

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  • Portable handheld circular saw
  • Portable handheld circular saw

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Example 1: V-shaped member

[0042] image 3 It is a structural schematic diagram of the first embodiment of the anti-recoil device of the hand-held portable circular saw of the present invention, Figure 4 It is a sectional view of the first embodiment of the anti-recoil device of the hand-held portable circular saw of the present invention, and the first embodiment of the anti-recoil device of the present invention is a V-shaped member. Such as image 3 and Figure 4 As shown, the locking edge 19 is located on the outside of one side 15 of the guide rail boss, and the outside of the other side 23 of the guide rail boss is not provided with an anti-recoil device. One end of the locking edge 19 extends toward the groove 8, and the locking edge 19 The other end of the other end is installed on the base 10 through the fixed edge 20, the locking edge 19 and the fixed edge 20 form a V-shaped member 18, the locking edge 19 and the fixed edge 20 are made of a metal mater...

Embodiment 2

[0046] Embodiment 2: pendulum mechanism

[0047] Figure 5 It is a structural schematic diagram of the second embodiment of the anti-recoil device of the hand-held portable circular saw of the present invention, Figure 6 It is a sectional view of the second embodiment of the anti-recoil device of the hand-held portable circular saw of the present invention. Such as Figure 5 and Figure 6 As shown, the second embodiment of the anti-recoil device of the present invention is a swing link mechanism. The difference between the swing link mechanism and the V-shaped member is that the locking edge of the swing link mechanism is a swing link 25, and the swing link 25 One end stretches toward groove, and the other end of swing rod 25 is installed on the base 10 by rotating shaft 24, and base 10 is provided with a positioning face 17 that positioning swing rod 25 stretches toward groove depth, is provided with a between base 10 and swing rod 25. A spring 26 that makes the fork 2...

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Abstract

The invention relates to a portable handheld circular saw. The portable handheld circular saw comprises a shell, a gearbox, a saw web, a holding portion, a base, a protective cover and a hinge mechanism, wherein the shell is used for containing a motor, and the gearbox is used for containing a speed change mechanism. The base is provided with a recoil prevention device matched with a guide rail, the recoil prevention device comprises a locking edge at least, one end of the locking edge stretches towards a groove, the locking edge is designed to be capable of rotating around the other end of the locking edge, and the included angle between the locking edge and the side face of a guide rail boss in the forward cutting direction of the saw web is less than 90 degrees. Due to the fact that the portable handheld circular saw is provided with the recoil prevention device, the circular saw is allowed to move only along the guide rail in the cutting direction; when the circular saw moves in the reverse direction or rebounds, the recoil prevention device can enable the circular saw to be locked on the guide rail, and the circular saw is operated safely and reliably.

Description

technical field [0001] The invention belongs to the field of hand-held electric appliances, in particular to a hand-held portable circular saw. Background technique [0002] According to different ways of use, electric circular saws can generally be divided into desktop circular saws, portable circular saws and hand-held circular saws. For the hand-held circular saw, in order to protect the user, a protective cover capable of surrounding the saw blade is provided on the housing. However, hand-held portable circular saws with plunge-feeding, when the rotating saw blade cuts into the workpiece, there will be a sudden and violent reverse motion or rebound, which will cause the circular saw to fly away from the workpiece and the guide rail and fly towards the user, and will also Damage to guide rail or / and saw blade. Contents of the invention [0003] The object of the present invention is to provide a hand-held portable circular saw with an anti-recoil device, which can pre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23Q9/00B23D45/16B25F5/00B27B9/00
Inventor 林有余
Owner SUMEC HARDWARE & TOOLS
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