CN100455391C

CN100455391C - Electric hand tool machine

Info

Publication number: CN100455391C
Application number: CNB200310119682XA
Authority: CN
Inventors: 乌尔里希·博内; 欧根·希尔德; 海科·勒姆
Original assignee: Sunworld Industries Saxony Ltd
Current assignee: Sunworld Industries Saxony Ltd
Priority date: 2002-11-22
Filing date: 2003-11-21
Publication date: 2009-01-28
Anticipated expiration: 2023-11-21
Also published as: CN1502437A; GB2395460B; GB2395460A; GB2395460B8; GB0327203D0

Abstract

An electric hand tool machine, in particular a hand-held electric circular saw, comprises a machine housing 10, a rotatable tool, in particular a circular saw blade 14, and a handle 11, which is fixed on the machine housing and extends along a handle plane 18 parallel to a rotational plane 19 of the tool. In order to enable an optimum between a small machine length and good single-handed handling during application and guidance on the workpiece, the handle plane is situated between the rotational plane of the tool and a centre-of-gravity plane 20 parallel thereto and extending through the centre of gravity of the machine, wherein the distance of the handle plane from the rotational plane is minimized.

Description

Electric hand-held power tool

Technical field

The present invention relates to a kind of electric hand-held power tool, especially the hand electric circular sawing machine.

Background technology

Have rotary cutter electric hand-held power tool, have a handgrip as manually-operated circular saw machine, the relative rotary cutter of the mid-plane of this handgrip staggers along the rotation of cutter.For operation tool machine well, for example be placed on the workpiece well and carry easily, will arrange handgrip like this, so that in the middle of it or symmetrical plane, be that so-called handgrip plane is as much as possible near the center of gravity of toolroom machine.During the course of work, but a bimanualness that is configured to the additional handgrip implementation tool machine of kob, so that can carry out accurate linear interpolation.But this kob all can be touched in all working situation equally well, and this catches other position of toolroom machine with regard to causing the operator with an empty hand, and might grab on the dangerous position that can come to harm in some cases.

Disclose little manually-operated circular saw machine, wherein handgrip is arranged on the back of protective cover in this wise, and promptly the handgrip plane flushes with the plane of saw blade.This manually-operated circular saw machine has still acceptable structure length on operative orientation because the size of saw blade and protective cover is little.By handgrip plane and Plane of rotation are coincided, under the situation of sawing the feeding of carrying out manually-operated circular saw machine when operating by handgrip, can not produce heeling moment singlehandedly, can realize having very high-quality linear incision thus.Yet, will be unfavorable for that singlehanded ground is placed into this toolroom machine on the workpiece by handgrip, but owing in light weight this of this toolroom machine still can be accepted because the distance of handgrip and toolroom machine center of gravity is big.For actual powerful manually-operated circular saw machine with big saw blade diameter, will abandon this handgrip scheme, because on the one hand, singlehanded ground is placed on the weight that needs big inadequately operating physical force on the workpiece and can not receive with the toolroom machine level land; And on the other hand, this toolroom machine will have very big structure length reluctantly, because handgrip is positioned at the back of protective cover.Manually-operated circular saw machine with macrostructure length is seldom approved in being different from the family expenses working range of professional work scope.

Therefore under the situation of powerful manually-operated circular saw machine, the described handgrip scheme of the most handy beginning, wherein the toolroom machine center of gravity is arranged in the handgrip plane and as far as possible closely near the handgrip plane.

Summary of the invention

According to the present invention, a kind of electric hand-held power tool has been proposed, especially the hand electric circular sawing machine has engine housing, the cutter that can be driven in rotation, especially saw blade, and being fixed on handgrip on the engine housing, this handgrip extends in the handgrip plane parallel with the Plane of rotation of cutter, wherein, the handgrip plane, and has from Plane of rotation and to be arranged to minimum axial distance with this Plane of rotation between the gravity plane parallel and that extend by the toolroom machine center of gravity the Plane of rotation of cutter and one.

Electric hand-held power tool of the present invention has its advantage, promptly pass through according to handgrip horizontal layout of the present invention, between toolroom machine length, protective cover size and singlehanded operability, reach optimal coordination, but under the situation of acceptable toolroom machine length both the implementation tool machine on workpiece easily, keep flat, can when toolroom machine is operated, only reach high-quality linear incision again by described handgrip.The handgrip plane is determined by the size of protective cover under the situation of the predetermined toolroom machine length of being minimized in of cutter Plane of rotation distance, so that the handgrip plane increases along with the increase of the size of protective cover from cutter Plane of rotation distance.This will not cause, and the handgrip plane overlaps with cutter Plane of rotation or toolroom machine gravity plane.The small distance on handgrip plane makes the heeling moment during the cutting operation reduce and improve thus the quality of the linear incision of one-handed performance, and the bigger distance of handgrip allows bigger protective cover and allows handgrip to conform with ergonomics well simultaneously.

Can be implemented in the further favourable configuration and the improvement of the hand held power machine that provides in the such scheme by the measure of describing in illustrating below.

According to a favourable form of implementation of the present invention, on the toolroom machine housing, be provided with an additional handgrip, it is configured to have the arc handgrip rotating shaft front, that be arranged essentially parallel to the handgrip zone of rotating shaft extension at cutter.Handle knob and compare with one, this new-type arc handgrip that is used for both hands steering tool machine provides a much bigger handgrip zone, it can realize controlling flexibly the position so that no matter still all can guarantee to conform with ergonomics and that get rid of injury danger, reliable toolroom machine under the working condition that might occur and operate for left hand for the right hand.And also can aim at its center of gravity and carry toolroom machine and with the hands very accurately keeping flat on the workpiece best by arc handgrip.

According to a favourable form of implementation of the present invention, a handle end of arc handgrip is connected on the protective cover or is being connected on the engine housing near the protective cover, and is fixed on the housing parts of engine housing near deviating from another handle end of protective cover or this end.In this housing parts, held a drive motor that is used for cutter drives.Realized the firm mechanical connection of arc handgrip on engine housing thus.

Description of drawings

In the following description, will be described in detail the present invention by an embodiment shown in the accompanying drawings.Wherein with perspective representation:

Fig. 1; The view of a hand electric circular sawing machine;

Fig. 2; Vertical view according to the hand electric circular sawing machine that does not have support plate of Fig. 1.

The specific embodiment

Represent with different views in the accompanying drawings, as being used to cut or the hand electric circular sawing machine of the general electric hand-held power tool embodiment of grinding ground processing work has the engine housing 10 of a two halves shell, this engine housing have one on integrally formed, be used to guide and handgrip 11 and a connected motor field frame 12 of operation tool machine, in motor field frame, hold an air cooled motor.This motor drives a driving shaft 13 by a unshowned single-stage speed changer, is clamping a saw blade 14 on this axle.This saw blade 14 zone is at an upper portion thereof covered by a protective cover 15, and this protective cover is screwedly mounted on the engine housing 10.This protective cover 15 extends always and reaches the support plate 16 that is connected with engine housing 10, and toolroom machine is bearing on the workpiece by this support plate in the saw operating process.Saw blade 14 passes that support plate 16 stretches out and decide to stretch out from this support plate some more or less downwards on required cutting depth.For the cutting depth of adjustment means machine, this support plate 16 can be swung at the swinging axle that is fixed on the engine housing 10 in saw blade 14 fronts on the operative orientation around one, and wherein selected swing position fixes by an adjusting device.Another is located at the cutting angle that adjusting device 17 on the support plate 16 allows to come around a swing with the swinging axle of saw blade plane parallel extension by support plate 16 the adjustment means machine.

As in Fig. 1 and can find out in Fig. 2 that especially handgrip 11 is formed on the engine housing 10 in this wise, i.e. the mid-plane of handgrip or symmetrical plane-parallel with the Plane of rotation of saw blade 14 hereinafter referred to as handgrip plane 18-.In order to reach in the optimum state aspect excellent operability and the high-quality processing effect when the one-handed performance toolroom machine, and this optimum state can satisfy the requirement that toolroom machine is easy to be placed on the workpiece and makes accurately linear interpolation aspect of toolroom machine by handgrip, handgrip 11 is arranged on the engine housing 10 in this wise, and promptly handgrip plane 18 should be at the Plane of rotation 19 and parallel also passing through between the gravity plane 20 of toolroom machine center of gravity extension with this Plane of rotation of saw blade 14.At this, handgrip plane 18 is as far as possible closely shifted to Plane of rotation 19 and is made it and the distance of Plane of rotation 19 should make as much as possible little.By minimizing of handgrip plane 18 and Plane of rotation 19 parallel offset amounts, when moving forward toolroom machine 10, just formed with to the minimum range of Plane of rotation 19 accordingly, very little heeling moment, this moment can be carried out accurate linear interpolation thus without a doubt with the hand compensation singlehandedly.In addition, this parallel offset allows to use the big protective cover of diameter, and can not make handgrip have big longitudinal size having a negative impact aspect the ergonomics or toolroom machine must be made on operative orientation.

In order further to improve the operation of toolroom machine, be provided with arc handgrip 21, it constitutes with second additional handgrip that holds and can realize the both hands guiding in the work engineering with handgrip 11.From the operative orientation of toolroom machine, this arc handgrip 21 is set on the front of the driving shaft 13 of saw blade 14, the close engine housing 10 of its forefoot area.These arc handgrip 21 usefulness one handle end are connected on the protective cover 15 or are connected near on the engine housing 10 of protective cover 15, this arc handgrip extends in the top of support plate 16 with its handgrip zone 211 that is arranged essentially parallel to the rotating shaft of saw blade 14 and from this support plate one segment distance, and is fixed on the motor field frame 12 with its another handle end.Guaranteed arc handgrip 21 very firm mechanical connection on engine housing 10 thus.But by arc handgrip 21 machine that can make tool very accurately lie on the workpiece and when the saw operation both hands control well and lead, wherein arc handgrip 21 is big controls the zone and can guarantee in all working situation no matter still all to accomplish for left hand for the right hand and conform with ergonomics and reliable toolroom machine operation.In addition, can accomplish that corresponding its center of gravity is carried toolroom machine by arc handgrip 21.

The present invention is not limited on the described hand electric circular sawing machine.It can be used for the manual electric tools of all band rotary cutting tools, as the electronic wall chase machine that mills

, electronic stone saw etc.

Claims

1. electric hand-held power tool, has engine housing (10), the cutter that can be driven in rotation, and be fixed on handgrip (11) on the engine housing (10), this handgrip extends in the handgrip plane (18) parallel with the Plane of rotation (19) of cutter (14), it is characterized in that, the Plane of rotation (19) that handgrip plane (18) is positioned at cutter (14) with one with between this Plane of rotation gravity plane (20) parallel and that extend by the toolroom machine center of gravity, and have from Plane of rotation (19) and to be arranged to minimum axial distance, wherein, on engine housing (10), be provided with the additional handgrip of an arc handgrip (21) form, should additional handgrip have from toolroom machine work direction in the rotating shaft front of cutter (14), be arranged essentially parallel to the handgrip zone (211) that rotating shaft extends, the protective cover (15) that cutter (14) is set on the engine housing (10) covers at least in part, a handle end that reaches arc handgrip (21) is connected on engine housing (10) or the protective cover (15) on the end that deviates from handgrip (11) of protective cover (15) or its vicinity, is fixed near another handle end of arc handgrip (21) or this end on the housing parts (12) that holds the drive motor that drives cutter (14) of engine housing (10).

2. according to the toolroom machine of claim 1, it is characterized in that: described electric hand-held power tool is the hand electric circular sawing machine.

3. according to the toolroom machine of claim 1 or 2, it is characterized in that: described cutter is a saw blade.