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Handheld jigsaw

A reciprocating saw, hand-held technology, applied in the direction of sawing machine, metal sawing equipment, metal processing equipment, etc., can solve the problems of small reciprocating saw, expensive, inclined, etc., to achieve the effect of deformation

Inactive Publication Date: 2010-12-08
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These hand-held reciprocating saws are compact, but heavy and expensive, since radial holes for complex actuating elements of the saw blade clamping device are provided in the reciprocating lever
In addition, hand-held reciprocating saws with flat reciprocating rods and large-volume chucks are known, which are more cost-effective, but rather heavy, wherein the reciprocating rods with large chucks are too long and are therefore not suitable for compact, small reciprocating saw
Furthermore, the result of the large chuck is that the chuck always has a large overshoot of the rod of the saw blade beyond the bearing of the lower reciprocating rod, whereby large bending moments act on the region of the reciprocating rod protruding beyond the bearing of the lower reciprocating rod, As a result, the saw blade tends to leave the prescribed trajectory due to the manipulation force during sawing, which may lead to inclined sawing

Method used

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Examples

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Embodiment Construction

[0021] figure 1 The jigsaw 10 shown in includes a housing 12 in which a symbolic motor 14 is provided. The motor 14 is used to drive the reciprocating rod 30 and impart a reciprocating motion to the reciprocating rod through the transmission device 20, 22, 26, 28, and the reciprocating motion is transmitted to the saw blade 36. The saw blade 36 is detachably clamped in the saw blade clamping device 38 at the end of the reciprocating rod 30.

[0022] The housing 12 is swingably connected to the bottom plate 54 on its bottom surface, and the saw blade 36 penetrates the bottom plate downward so as to be able to perform sawing under the bottom plate 54.

[0023] The reciprocating rod 30 configured as a continuous and smooth circular tube is linearly movably supported by upper and lower reciprocating rod bearings 32, 34 in the housing 12, and is provided with a reciprocating rod integrated in the tube at its lower end for The saw blade clamping device 38 that receives the saw blade 20....

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Abstract

The invention relates to a handheld jigsaw having a lifting rod (30) and a saw blade chuck device (38) for the detachable holding of a saw blade (36), said device being attached at the lower end of said rod, characterized in that the lifting rod (30) is configured as a pipe, particularly a smooth pipe, which in the interior accommodates the chuck device (38) at the free end thereof, said device being supported in a displaceable manner by at least one, particularly two, particularly wedge-shaped clamping jaws (42, 44) carrying an inclined surface and being axially displaceable from the outside in the longitudinal direction on a counter-inclined surface (64) that is likewise longitudinally arranged in a pipe in a fixable manner, wherein an axially parallel surface (60) of the clamping jaw serves as the clamping surface for the support on a flat side of the saw blade, particularly the clamping shaft thereof.

Description

Technical field [0001] The invention relates to a hand-held reciprocating saw according to the preamble of claim 1. Background technique [0002] The known hand-held reciprocating saw machine has a tubular or cylindrical reciprocating rod and a saw blade clamping device arranged inside the reciprocating rod. Although these hand-held reciprocating saws are compact, they are heavy and expensive because the reciprocating rod is provided with radial holes for the laborious operating elements of the saw blade clamping device. In addition, hand-held reciprocating saws with flat reciprocating rods and bulky chucks are also known. They are more cost-effective but quite heavy. Among them, reciprocating rods with large chucks are too long and therefore not suitable for compact, small And light reciprocating saw. In addition, the result of the large chuck is that the chuck and the rod of the saw blade always have a large excess beyond the bearing of the lower reciprocating rod, so that a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23D51/10B23D49/16
CPCB23D51/10B23D49/162
Inventor J·劳考茨基
Owner ROBERT BOSCH GMBH
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