CN100415454C

CN100415454C - Electric hand-held machine tool

Info

Publication number: CN100415454C
Application number: CNB038253771A
Authority: CN
Inventors: 赫尔穆特·瓦涅克
Original assignee: Robert Bosch GmbH
Current assignee: Robert Bosch GmbH
Priority date: 2002-11-25
Filing date: 2003-07-11
Publication date: 2008-09-03
Anticipated expiration: 2023-07-11
Also published as: JP2006507134A; DE10254829A1; WO2004048045A1; EP1567308A1; EP1567308B1; CN1700972A; DE50307343D1

Abstract

The invention relates to an electric hand-held machine tool, especially an angle screwdriver, which comprises a machine housing (10), an adjustable angle working head (12) mounted on the working end of the machine housing (10) , off-set vis-a-vis the housing axis (101) for driving a tool, and a lighting device (22) disposed on the machine housing (10) for illuminating the work point of the tool. In order to optimally illuminate the working point in any working positions of the adjustable angle working head (12), the lighting device on the working end of the machine housing (12) is disposed on the same and is adapted to be rotated about the housing axis (101) of the machine housing (10).

Description

Electric hand tool

Technical field

The present invention relates to a kind of electric hand tool.

Background technology

In this class electric hand tool that constitutes as the elbow screwdriver, the lighting device of screwing the place that is used for throwing light on is integrated in machine case, regulate illumination like this: when the elbow screwdriver is in the operating position of main use, when screwdriver is put into when screwing on the place, the light of lighting device drops on screws on the place, and this place is comprised that it illuminates on every side.Narrow steric requirements given in advance but also has such working condition: owing to must be screwed bent angle head with respect to machine case deflection, so that screwdriver can be put on the screw.In this case, can not or can not therefore obviously influence the course of work sufficiently to screwing the place illumination.

Summary of the invention

According to the present invention, a kind of electric hand tool has been proposed, elbow screwdriver particularly, has a machine case, has a bent angle working head on the working end that is arranged on this machine case, this bent angle working head have one directed with respect to housing axis being bent angularly ground, be used for driving the output shaft of cutter and can being adjusted to different operating positions by rotation around the housing axis, also has a lighting device that is arranged on the machine case, the job site of cutter is used to throw light on, wherein, lighting device is arranged on the working end of machine case and can constructs rotatably around the housing axis, wherein, disposed consistent for lighting device with these operating positions of bent angle working head, discrete position of rotation.

Advantage with electric hand tool of the present invention of the described feature of such scheme is, by being arranged on the rotatability of the lighting device on the machine case working end, the light of lighting device always can be adjusted on the position that has changed with respect to machine case of work cutter, like this, in each operating position of bent angle working head, can both farthest be thrown light in the job site.Thus, on unattainable narrow place, also can provide enough visual conditions for the erector.

Can advantageously expand and improve the electric hand tool that in such scheme, provides by the measure that provides in illustrating below.

According to an advantageous forms of implementation of the present invention, for lighting device has disposed a plurality of and corresponding to, the discontinuous position of rotation in the operating position bent angle working head.The advantage of this structural measure is to guarantee automatically all that in each operating position of bent angle working head the job site by optimal illumination, does not require correction.

According to an advantageous forms of implementation of the present invention, lighting device has the hollow cylinder lamp box and the light source that are sleeved on the machine case, this light source is accommodated in the lamp tube that of being shaped in lamp box, wherein, the tube axis of lamp tube becomes an acute angle ground orientation and its nozzle to point to the bent angle working head with the housing axis.The discrete position of rotation of these of lighting device is realized by the corresponding rotation of lamp box on machine case, wherein, according to an advantageous forms of implementation of the present invention, in each position of rotation of lamp box, between lamp box inwall and machine case outer wall, exist shape sealed.

According to an advantageous forms of implementation of the present invention, lamp box is combined into by the casing shell of two preferred mirror image symmetries, and these casing shells are fitted mutually along a plane of extending by the housing axis.This shape sealed by at least two mutually corresponding, respectively on the lamp box inwall and the polygon that constitutes on the machine case outer wall realize that wherein, the quantity on polygonal limit is corresponding to the quantity of the possible operating position of bent angle working head.If the bent angle working head for example can be adjusted to altogether eight in 45 ° position of rotation with respect to machine case, then these polygons are implemented with octagon respectively, obtain eight position of rotation altogether of lamp box thus, each is corresponding regularly with an operating position of bent angle working head for each in them.Two casing shells are fixed together by clamping device.Can on the polygon of machine case, be offset lamp box by unclamping clamping device.After being adjusted to desirable position of rotation, two casing shells are connected by clamping device again.

Description of drawings

Explain the present invention in detail by an embodiment illustrated in the accompanying drawings in the following description.Accompanying drawing is represented:

The partial side view of an elbow screwdriver of Fig. 1, part is dissectd,

The side view of the lighting device on Fig. 2 elbow screwdriver shown in Figure 1,

A vertical section of the lighting device among Fig. 3 Fig. 2,

This lighting device of Fig. 4 is along a view of arrow IV direction among Fig. 2,

This lighting device of Fig. 5 is along a view of arrow V direction among Fig. 2,

Fig. 6 is along the section of Fig. 3 center line VI-VI,

Fig. 7 is along the section of Fig. 3 center line VII-VII.

The specific embodiment

Example as the common electric hand held power machine that has adjustable bent angle working head, with part an elbow screwdriver is shown with dissecing partly at Fig. 1, it has a machine case 10, and this machine case has one and is used for bent angle and screws a containing seat 11 of 12 on it deviates from the working end of the handgrip that is used to grasp the elbow screwdriver.This partly from machine case 10 outstanding containing seat 11 deviate from bent angle with it and screw a rearward end of 12 and enter in the machine case 10 and be screwed in wherein.Containing seat 11 has a plurality of straight pins that are pressed into 13 in the end face side, altogether four in the present embodiment, bent angle is screwed 12 and is had the recess 14 that staggers in a circumferential direction (in the present embodiment altogether eight) at it on the end of straight pin 13, when loading onto bent angle and screw 12, straight pin 13 shape vertically embeds in these recesses sealedly.These straight pins 13 and recess 14 are equally distributed on the circumference respectively, wherein, the mutual anglec of rotation spacing of straight pin 13 is equivalent to the twice of the mutual anglec of rotation spacing of recess 14, always have four straight pins 13 to embed bent angles screws in eight recesses 14 altogether of 12 four like this, at every turn.Bent angle is screwed 12 pull up from straight pin 13 after, this bent angle can be screwed anglec of rotation of the each rotation of head, this anglec of rotation is 45 ° corresponding to the mutual spacing of two recesses 14 in the present embodiment, installs on the straight pin 13 with its recess 14 covers again.Thus, bent angle is screwed 12 settings of can staggering by eight position of rotation with respect to the housing axis 101 of machine case 10 altogether, like this, bent angle is screwed head and is had eight the different operating positions altogether that are used for screwdriver under the situation of machine case 10 invariant positions.Each screws the position with respect to another 45 ° of anglecs of rotation that stagger.Be fixed in the containing seat 11 for bent angle being screwed 12, be provided with a locking nut 15, it can be screwed on the external screw thread of containing seat 11.

Screw in 12 at bent angle and to be provided with a bevel gearing 16 of forming by two bevel gears that are meshed, one of them bevel gear 17 can not be contained on the driving shaft 18 with relatively rotating, and another bevel gear 19 can not be contained in one with relatively rotating and meet at right angles on the directed output shaft 20 in ground with driving shaft 18.Driving shaft 18 and output shaft 20 are rotatably supported in bent angle and screw in 12.Driving shaft 18 connect in the centre under the situation of a variable speed drive and a torque limiter by one unshowned here, be contained in the Motor Drive in the machine case 10.A chuck 21 that is used to hold screwdriver is not connected with output shaft 20 rotationally.

This elbow screwdriver has one and is used for screwing the lighting device 22 in place screwing process illumination.This lighting device 22 comprises lamp box 23 and light source that is the LED24 form of a hollow cylinder, a lamp tube 231 is shaped in this lamp box, light source is contained in the lamp tube 231 and is connected with a power supply by a cable 33, for example is designed to the battery in the elbow screwdriver of battery screwdriver.Lamp box 23 is contained on the working end of machine case 10 and is clamped, makes it can not be pulled up in the axial direction.Lamp tube 231 is formed on the side of lamp box 23, make the housing axis 101 axis of the lamp box 23 of coaxial arrangement (and with) of tube axis 231a and machine case 10 become an acute angle to extend and nozzle 231b sensing bent angle screws 12, the light of LED24 is from this nozzle ejaculation.

Lamp box 23 can be adjusted on machine case 10 in the discontinuous position of rotation, and wherein, to screw an operating position of 12 consistent with bent angle respectively for each position of rotation.These discrete position of rotation are sealed given in advance by the shape between machine case 10 and the lamp box 23 respectively.

The lamp box of expressing with different views and section in Fig. 2 to 7 23 is combined into by two

best casing shells

25,26 made of plastic, and these casing shells engage (Figure 4 and 5) along a plane of extending by the housing axis 101 of machine case 10.Half of lamp tube 231 respectively is shaped in each casing shell 25,26.To produce shape sealed in order (to screw eight working positions of 12 corresponding to bent angle in the present embodiment and to be equipped with eight position of rotation) in these position of rotation of lamp box 23, on the inwall of lamp box 23, constitute an octagon 27 (Fig. 3 and 6), it with the outer wall of machine case 10 on an octagon identical, that in Fig. 1, express 34 corresponding.Octagon 27 and correspondingly the octagon 34 of machine case 10 have very little axial depth or width.Octagon 27 be formed in respectively on a fifty-fifty basis in the casing shell 25 and casing shell 26 in.

After being contained in two

casing shells

25,26 on the machine case 10, this two

casing shells

25,26 releasably interconnect by clamping device.Be provided with a clamp ring 28 and a preferred spring clamp ring 29 made of plastic in the present embodiment as clamping device, they surround two casing shells 25,26.As indicated in Fig. 1, at this, clamp ring 28 bent angle that deviates from that is arranged on lamp box 23 of packing into is screwed in the cannelure 30 on 12 the rearward end, and spring clamp ring 29 is clamped in screwing on the other end of 12 in one of the moulding of end face side axially outstanding ring holder 31 towards bent angle at lamp box 23.

It is the operating position that the elbow screwdriver uses under the most frequent situation that the bent angle of expressing in Fig. 1 is screwed a base position of 12, in this position, the lamp tube 231 that has LED24 is arranged in the lower area of machine case 10, make be arranged in the lamp tube 231 LED24 automatically the bent angle that is contained in of illumination screw screwdriver in 12 the chuck 21.If under the constant situation of machine case 10 directions, bent angle is screwed 12 housing axis 101 deflection around machine case 10, must locking nut 15 be unclamped according to the explanation of front for this reason, bent angle is screwed 12 around housing axis 101 deflections of machine case 10 and locking nut 15 is screwed on again, then must then lamp box 23 be rotated the identical anglec of rotation.Because lamp box 23 to screw an operating position of 12 by the position of rotation of octagon 27 regulation and bent angle consistent, so after corresponding rotation lamp box 23, can guarantee, screw at bent angle that screwdriver is also thrown light on best by LED24 in 12 the new operating position.Spring clamp ring 29 and clamp ring 28 to be taken off from lamp box 23 in order to rotate lamp box 23.Becoming freely thus, two

casing shells

25,26 are making up mutually again and are being fixed in the new position of rotation by the clamp ring 28 that is clamped in the spring clamp ring 29 that encircles in the holder 31 and the cannelure 30 of packing in the position of rotation accordingly.In this new position of rotation, octagon 27 and octagonal all sides corresponding with it, that constitute on machine case 10 entirely recline again mutually.

In the illustrated embodiment, screw on 12 the end and also constitute another octagon with little axial depth 32 at the bent angle that deviates from of lamp box 23, it with the outer wall of machine case 10 on the octagon 35 corresponding (Fig. 1) that on same position, constitutes.Its advantage is, lamp box 23 is on leading section and rearward end are clamped at each

octagon

34,35 on the machine case 10 the samely.

The sealed structure of shape between machine case 10 and the lamp box 23 depends on that bent angle screws the quantity of 12 possible operating positions.If it for example has only four operating positions of 90 ° of staggering mutually, then this shape sealed by on machine case 10 outer walls and the quadrangle of the mutual correspondence on lamp box 23 inwalls realize.

Claims

1. electric hand tool, has a machine case (10), has a bent angle working head (12) on the working end that is arranged on this machine case (10), this bent angle working head have one directed with respect to housing axis (101) being bent angularly ground, be used for driving the output shaft (20) of cutter and can be adjusted to different operating positions by rotation around housing axis (101), also has a lighting device (22) that is arranged on the machine case (10), the job site of cutter is used to throw light on, it is characterized in that, lighting device (22) is arranged on the working end of machine case (10) and can constructs rotatably around housing axis (101), wherein, disposed consistent for lighting device (22) with these operating positions of bent angle working head (12), discrete position of rotation.

2. according to the electric hand tool of claim 1, it is characterized in that, lighting device (22) has a cover and installs to a lamp box on the machine case (10), hollow cylinder (23) and a light source (24), this light source is accommodated in the lamp tube (231) that of being shaped in lamp box (23), the tube axis (231a) of lamp tube becomes an acute angle ground directed with housing axis (101), the nozzle of lamp tube (231b) points to bent angle working head (12).

3. according to the electric hand tool of claim 2, it is characterized in that, between the outer wall of the inwall of lamp box (23) and machine case (10), in each position of rotation of lamp box (23), exist shape sealed.

4. according to the electric hand tool of claim 3, it is characterized in that, lamp box (23) is by two casing shells (25,26) be combined into, these casing shells engage along a plane of extending by housing axis (101), constitute at least one polygon (27) on the inwall of lamp box (23), on the outer wall of machine case (10), constitute at least one corresponding, identical polygon with it (34), and two casing shells (25,26) releasably interconnect by clamping device.

5. according to the electric hand tool of claim 4, it is characterized in that, this clamping device has a clamp ring (28) and/or a spring clamp ring (29), this clamp ring can be packed in the cannelure (30) that constitutes in lamp box (23), and this spring clamp ring can be clamped in one and go up in the ring holder (31) that constitutes at lamp box (23).

6. according to the electric hand tool of claim 5, it is characterized in that, ring holder (31) be arranged on lamp box (23) on the end of bent angle working head (12), cannelure (30) is arranged on the end that deviates from the bent angle working head of lamp box (23).

7. according to the electric hand tool of one of claim 4 to 6, it is characterized in that the lamp tube (231) that holds light source (24) respectively is formed in each casing shell (25,26) on a fifty-fifty basis.

8. according to the electric hand tool of one of claim 4 to 6, it is characterized in that, on lamp box (23) and the machine case (10) two corresponding mutually polygons (27,34) have very little axial depth, be arranged on lamp box (23) near the end of bent angle working head (12).

9. electric hand tool according to Claim 8, it is characterized in that, on the end that deviates from bent angle working head (12) of lamp box (23) and on the outer wall of machine case (10), constitute the polygon (32 of two other mutual correspondence at the same position place, 35), they have identical limit number with near the polygon (27,34) the end of bent angle working head (12) that is arranged on lamp box (23).

10. according to the electric hand tool of claim 1, it is characterized in that this electric hand tool is the elbow screwdriver.