DE19547332A1 - Electric hand machine tool - Google Patents

Electric hand machine tool

Info

Publication number
DE19547332A1
DE19547332A1 DE19547332A DE19547332A DE19547332A1 DE 19547332 A1 DE19547332 A1 DE 19547332A1 DE 19547332 A DE19547332 A DE 19547332A DE 19547332 A DE19547332 A DE 19547332A DE 19547332 A1 DE19547332 A1 DE 19547332A1
Authority
DE
Germany
Prior art keywords
housing
tool
characterized
machine according
output shaft
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
DE19547332A
Other languages
German (de)
Inventor
Steffen Dipl Ing Wuensch
Peter Stierle
Rudolf Fuchs
Joachim Mueller
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Priority to DE19547332A priority Critical patent/DE19547332A1/en
Priority claimed from DE1996511234 external-priority patent/DE59611234D1/en
Priority claimed from DE1996509803 external-priority patent/DE59609803D1/en
Publication of DE19547332A1 publication Critical patent/DE19547332A1/en
Ceased legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B23/00Portable grinding machines, e.g. hand-guided; Accessories therefor
    • B24B23/04Portable grinding machines, e.g. hand-guided; Accessories therefor with oscillating grinding tools; Accessories therefor
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25FCOMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F5/00Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
    • B25F5/02Construction of casings, bodies or handles

Abstract

The invention relates to an electrical tool machine (10) with a housing (11) which contains a motor (16) and a drive shaft (50) with at least two bearing points and an eccentric pin (52) movable in a circle and which contains one insert tool (88, 188, 288) coupled to the eccentric pin (52), movable backwards and forwards and having a fixing end (77) held in the housing (11). A carrier (68, 69) for transmission of movement is arranged between the insert tool (88, 188, 288) and the eccentric pin (51, 52), and the carrier (68, 69) has a bore (72, 72') into which the eccentric pin (51, 52) pivotably engages. Said tool machine can be produced more simply and economically in that the drive shaft (50) bearing point facing and/or facing away from the tool is operatively connected to at least one adjustment means (56) axially displacing the drive shaft (50) in relation to the housing (11).

Description

State of the art

The invention relates to an electric hand machine tool according to the preamble of claim 1.

DE-OS 42 35 278 is a generic craft known machine, its file-like insert tool by an eccentric output shaft via a Driver is driven back and forth. The downforce is driven by an electric motor through an angular gear Movement set, being about 90 ° relative to the motor shaft angled output shaft no adjustment means for Adjusting the angular gear play, d. H. the game of Ab drive shaft relative to the motor shaft or the axial play the output shaft opposite the housing. The top The end of the output shaft is in the upper area of the gearbox housing of an axial and radial forces absorbing Rolling bearings and the lower shaft end in the lower area of the Gearbox housed by a needle bearing. There are no means to adjust / readjust the axial play of the Output shaft provided that without disassembly from the outside are adjustable. If the axial clearance has become too large,  is a considerable measurement, adjustment and assembly effort for Restoration of the original minimal axial play necessary. To keep the minimal game as low as possible or To secure long, the housing, the gear parts and the output shaft very dimensionally accurate and therefore proportionate are expensive to produce.

In addition, the division level of the housing runs as before usual for hand-held power tools, lower in working position right and even, with at least one depository from Ab drive shaft is in the area of the division plane, d. H. that the Camp seat is also shared. This allows the one set tool to the forces transmitted to the housing Deformation of the housing edges in the area of the division level to lead. This in turn can affect the bearing seats of the output shaft deform and thus interfere with the transmission function.

The clamping devices for the insert tool are from the outside Operating devices must be movable into the clamping and release position but also the movement of the driver and the tool can. As a result, the clamping means for coupling the Insert tool with the driver relatively expensive designed.

Advantages of the invention

The electric hand machine tool according to the invention with the characterizing features of claim 1 has the advantage that the output shaft with respect to the drive shaft and ge can be optimally adjusted compared to the housing. In order to is an effective tolerance compensation created, the Ver use of roughly tolerated, inexpensive to manufacture parts for the housing and the gearbox.

Further advantages of the invention result, for example by the features of the dependent claims, e.g. B. thereby that a simple positioning means is created which, as, ins especially with a steep thread, axially adjustable in the housing Bare bearing bush is designed and that the bearing bush on the underside of an upper, radial collar at least one  a ring wedge, which has a housing-side mating ring wedge is assigned as a support surface.

The positioning device is against unwanted adjustment with a Secure against rotation relative to the housing, whereby the anti-rotation lock in a particularly simple version an externally toothed clamping ring, the inside with a Two flat one counter double on the lower outside the bearing bush facing the collar or the ring wedge overlaps the side.

The fact that a compression spring on the as an adjusting ring trained anti-rotation supports and this against holds the bearing bush or the housing, is the Stellmit tel particularly wear-resistant. Also, the push button reliably returned to their starting position when it is released or when the tool is clamped.

The detachable arrangement of the anti-rotation device on one, esp special tool-facing, accessible from outside te enables adjustment of the axial play of the output shaft without dismantling the hand tool.

The fact that the side of the output shaft remote from the tool axially resilient against the housing, is the Axi as elastic over a large tolerance range comparable.

The support is simple and inexpensive in that the output shaft via a spring-mounted, axial slidable ball supports against the housing and that a compression spring is arranged in the upper housing shell, one with a housing-side spike and the other with one engages around a support disk-bearing pin and over the support disc supports against the ball, which in a front recess in the upper end of the output shaft sits and protrudes beyond the edge of the recess.

The bearing point in the upper housing shell can be skewed compensate the output shaft in that a ring-like Plain bearings to support the upper end of the output shaft is arranged, the tread is conical. The plain bearing is particularly similar to the misalignment of the output shaft  effective from, in that the tread of the Gleitla gers in their upper area over a length of about 2 to 3 mm cylindrical and down on it closing in an opening at an angle of about 5 ° 7 mm long conical area. The knockout African opening facilitates the assembly of the hand tools machine inserting the output shaft into the slide bearing.

Because the driver is disengaged by moving can be brought to the application tool, whereby the application can be separated from the drive and easily removed the operation with simple means, namely one Push button with which the driver ver is slidable. The insert tool is in the area of his Clamping in a longitudinal guide with little play and low friction and thus the drive and housing of work-related Shear forces and thus changing friction influences relieved by the longitudinal guide the flat engages around the clamping-side area of the insert tool and secures it against twisting when working.

A sealing cap covers the opening of the front area of the From the housing through which the shaft of the insert tool passes. It serves as a sliding guide and vibration damper application tool.

The fact that the insert tool is a transverse to its movement cutting edge, it is special hastily used as a chisel, spatula or the like.

The longitudinal guide is securely locked in the housing shell through a comprehensive, box-like profile with one Open at the back and front to allow the tool to pass through Recording tunnel.

The following, based on the design of the housing Benefits are not limited to scrapers, but rather meet for all hand tools with angular gear to. The housing is particularly resistant to deformation in that  it consists of two with a horizontal in the working position Partition level composite housing shells formed is, the output shaft in both housing shells in each a bearing is rotatably mounted. The stability of the Ge house is raised by the shells and by Tei dividing plane formed in the area of the neck - viewed in working position - bent down ver run and the kink serves as a handle. The Stiffening of the housing increases by attacking the Hand of the operator and as a result of the operating staff at the Ar process, whereby the housing shells ver ver into each other limited and firmly braced against each other.

Another advantage is that the clamping means for Attach the insert tool from just a few, inexpensive existing parts with which the insert tool conveniently, with a few simple steps with the driver operationally connectable and therefore quickly replaceable is. The danger that the operator on the cutting edge of the Insert tools injured, is due to the easy operation availability reduced. The simplified tool thus carries change to improve occupational safety.

The fact that the driver itself with a head start in the Removable recess of the clamping end of the insert tool intervenes, is a particularly simple structure, easily be Servable clamping system for designed as an insert tool Scraper tools created.

Because the push button in the release position for the Set tool held against the housing and the locking means by the tool when it is on can be released again, the push button does not have to held down while inserting the tool will. So one hand of the operator stands alone for that Hold the hand machine tool and the other hand Tool removal available. This makes the change easier of the application tool.  

Characterized in that the driver is designed as a connecting rod with a head with a projection becomes unwanted Avoid turning inside the housing and a special the quiet, wear-resistant barrel of the hand tool enough, with the head in the notch of the longitudinal guide is guided to dampen vibrations. The axles are limited parallel arrangement of the driving projection to the eccentric terpins with a radial distance to the recess Ver rotatability of the driver in relation to the eccentric pin and thus reduces friction and wear between the eccentric terzapfen, the driver and the insert tool. It is it is advantageous that the recess of the clamping end of the Insert tool is circular and essentially the same Chen diameter as the projection of the driver.

Instead of being circular, this can also be viewed in the direction of movement of the Insert extending elongated, elongated hole Taking the clamping end be designed, their length is greater than the stroke of the eccentric. This takes place Transmission of motion from the drive via the driver to the Tool only if the insert tool, for example when placed on the workpiece, opposite the projection of the driver is pushed back so far that the Support the projection on the edge of the slot and one back and forth Pass on the movement to the insert tool can. The insert tool is thus idling when turning of the motor and the driver silent, so that the Ver wear on the motion-transmitting parts reduced becomes.

The longitudinal guide is immovable as a separate body Arranged inside the case once the case shells are screwed together. The longitudinal guide is supported in the direction of movement of the inserted tool against a front wall from one of the housing shells and is thereby captive and play-free but at the same time also light changeable, held, because the longitudinal guidance after easy system from the housing shells in the front loading can be richly removed from the housing.  

Because the longitudinal guide is a separate body, she takes the cassette-like over the shaft of the insert bending forces transmitted to the housing on and forwards this over a large area to the housing, so that the exposed to only slight bending and twisting forces is and can be carried out in lightweight construction, whereby Rolling elements at both ends of the guide slot of the longitudinal guide the wear or the friction between the longitudinal guide and reduce the tool, because only roll is permitted instead of sliding friction.

The insert tool can be a chisel, scraper, or spatula The like. Made of metal, e.g. B. carbide or HSS steel. It is versatile, e.g. B. for carving, for removal of paint, wallpaper, carpet glue, foam backing, needle felt, PVC, also for cleaning work, e.g. B. Removing Dirt, adhesive and glue, plaster, plaster, filler, Putty, paint and silicone residues as well as mortar and concrete residues on building boards. After all, it can also be used as an underground preparations are made, e.g. B. screed and Preparation of concrete, smoothing of caterpillars and noses, grouting of cracks, removal of tile adhesive.

The insert tool has a fla in the area of the shaft chen, in particular rectangular, cross-section that in a Longitudinal guidance, especially in a flat slot, can be performed is and elastic, leaf spring-like, bending forces when scraping records. This prevents the insert tool from rotating its longitudinal axis is secured and springs when the Scha bumps between the workpiece and the operator.

Since the insert tool is a wearing part, that is rapid interchangeability is a major advantage. This Advantage arises from the interaction of the locking means of the insert tool with those of the hand machine tool. There with show both the hand tool and the one set tool invention features.  

drawings

The invention is illustrated with reference to the drawing examples in the following description explained.

In the drawings Fig. 1 is an exploded view of an exporting approximately example of Elektrohandwerkzeugma inventive machine, Fig. 2 the area designated in FIG. 1 II assembled in longitudinal section, Fig. 3, the end face La delay of the drive shaft shown in FIG. 2 as a detail, Fig. 4 1, the related parts shown in Fig. 1 enlarged, Fig. 5 shows a part of a white direct embodiment of the electric hand machine tool according to the invention in longitudinal section, Fig. 6 shows the detail of the end bearing of the drive shaft according to Fig. 5, Fig. 7 analogously Fig. 4 is an exploded view of parts of the machine tool of Fig. 5, Fig. 8 a to the electric hand tool machine according to Fig. 1-7 belonging insertion tool with an associated longitudinal guide for a handle of the driver three-dimensional view, Fig. 9 is a Ex plosionsdarstellung the longitudinal guide with rolling elements, Fig. 10 is an exploded view of the upper and lower Ren housings only with the slide bearing and the bearing bush according to FIG. 1 and FIG. 11 is an exploded view of the lower housing shell with the bearing bush.

Description of the embodiments

Fig. 1 shows an exploded view and Fig. 2 is a partial longitudinal section of an electric hand tool machine for scraping machining of workpieces, also referred to as a scraper 10th Whose cylindrical housing 11 is formed from two housing shells 12 , 14 made of plastic, the edges of which each form a dividing edge 15 which define a horizontal parting plane. The housing 11 has in its rear area a thickening 30 and in its front loading area a neck 32 inclined relative to the housing axis. Between the neck 32 and the thickening 30 , the housing is designed as a handle 28 . The housing shells 12 , 14 can be connected to one another by screws 26 .

An electric cable, not shown, can be secured to the housing 11 by a further screw 24 with a clamp. In the interior of the housing 11 there is a motor 16 with a fan wheel 18 , the drive shaft 19 of which is mounted in a ball bearing 20 and is non-rotatably connected to a conical pinion 22 . The pinion 22 meshes with a conical ring gear 48 which is rotatably supported by an output shaft 50 and whose axis of rotation 36 extends at right angles to the drive shaft 19 .

The tool-remote bearing of the output shaft 50 consists of a ring-like in a cylindrical bearing receptacle 38 of the housing shell 12 insertable bearing 40 , in particular re sintered material, a compression spring 42 , a support disc 44 and a ball 46 , which in a central recess 43 in the upper end face the output shaft 50 is mounted.

The compression spring 42 engages around one end, a ge fixed mandrel 41 and below, that is, the other end, a support plate 44 bearing pin 44 'and is supported on the support plate 44 against the ball 42 , which in the central recess 43 of the output shaft 50th sits, projecting beyond the edge of the recess 43 . The Gleitla ger 40 has a tapered or spherical inner tread 47 for receiving the upper bearing end of the output shaft 50th Since through, and also by the axial support on the ball 46 , the output shaft 50 can be inclined by a certain amount with respect to the central axis of the plain bearing 40 leads without ge without the plain bearing 40 being destroyed. This enables the use of roughly tolerated manufactured parts for the scraper 10 , the function of which is ensured in high quality.

The bearing near the tool of the output shaft 50 consists of a sleeve-like bearing bush 56 , an annular disk 54 and a roller bearing or needle bearing 58 .

An eccentric pin 52 with an eccentric axis 53 carried by the end of the output shaft 50 near the tool passes through the bearing bush 56 , its free end engaging from above in a bore 72 of a connecting rod-like driver 68 which is supported axially downward on a pushbutton 76 . Other eccentric drives known per se can also be used here.

The distance between the eccentric axis 53 and the axis of rotation 36 determines the eccentricity, the double eccentricity determining the stroke of the eccentric pin or of the driver 69 .

Arranged between the driver 68 and the bearing bush 56 are an anti-rotation device 62 and a disk 66 , between which a spacing spring means 64 is supported. The trained as an adjusting washer or clamping ring anti-rotation 62 is designed for positive engagement around the bearing bush 56 . The push button 76 closes an opening 60 in the lower housing shell 14 in a dust-tight manner and ends there flush with the housing contour.

In Fig. 2 it is shown that the edge of the federal government 71 'serves as a stop for the clamping end 77 , with the recess 90 in the clamping position 77 being exactly aligned with the projection 70 of the driver 68 . This facilitates the insertion of the insert tool 88 , 288 , because when the insert tool 88 , 288 on the collar 71 'can be felt easily, the latching of the projection 70 into the recess 90 is secure, so that the exact clamping position is sufficient and the push button 76 is released can be.

Behind a frontal opening 34 of the housing 11 , which is formed in part by appropriate shapes of the housing shells 12 , 14 , a longitudinal guide 82 for an insert tool 88 is net angeord fixed inside the housing 11 . A transverse wall 13 is arranged in the region of the opening 34 in the upper plastic shell 12 and partially overlaps the outer end face 82 'of the longitudinal guide 82 and thus secures this against unintentional emergence from the opening 34 or against loss. In the longitudinal guide 82 , the shaft 89 of the insert tool 88 is guided so that it can be moved back and forth. The driver 68 engages with a projection 70 formed as a pin rotatable from above in egg ne circular recess 90 of the clamping end 77 of the shaft 89 of the insert tool 88th As soon as the output shaft 50 ro tiert, the eccentric pin 52 circles about the axis of rotation 36 , where the driver 68 follows him. As a result of the articulated coupling between the projection 70 of the driver 68 in the recess 90 of the shaft 89 , only the forward and backward movement portion of the eccentric pin 52 is transferred to the insert tool 88 , which is why the recess 90 can be circular or why a backdrop Elongated hole as shown in FIGS. 4, 5 is unnecessary.

Figs. 2 and 4 show that for low friction, better storage of the eccentric pin 52 of the cam 68 in its bore 72 for the passage of the eccentric pin 52, a Wälzla ger 73, in particular needle roller bearings, comprising. The cooperating with the 90 recess 70 is at a distance axially parallel to the recess 72 or to the roller bearing 73 angeord net.

Can see Fig. 1 to 4 in that the driver out 68 along the eccentric pin 52 and is resiliently mounted axially ver slidably and that the projection 70 of the Mitneh can be brought at its axial displacement out of engagement with the recess 90 of the insert tool 88 68 mers , so that the drive can be separated from the insert tool 88 . If this is the case, the insert tool 88 can then be easily removed and replaced by hand.

The driver 68 is pushed over the push of the push button 76 with the fingers of the operating hand in the release position ver. The push button 76 is in the housing 11 in the opening 60 - like an engine piston in the cylinder - slidably mounted in the housing shell 14 , wherein the push button 76 is just as sensible as the driver 68 , on which it is supported, be movable.

Between the driver 68 and the lower housing shell 14 , a compression spring 64 is arranged in alignment and concentrically with the output shaft 50 , which is supported at one end via a ring disk 66 on the driver 68 or the push button 76 and resets it to its starting position. The compression spring 64 is supported against the driver 68 . The washer 66 prevents the reciprocating movement of the driver 68 is transmitted to the compression spring 64 .

It can also be seen that the push button 76 is secured against falling out by means of snap hooks 75 , 79 striking in the interior of the housing shell 12 . To support the connecting rod-like driver 68 , the pushbutton 76 carries radial ribs 8 and 9 .

The insert tool 88 is guided in the region between its working end 92 carrying a cutting edge and its clamping end 77 in the longitudinal guide 82 . The longitudinal guide 82 is designed, see also FIG. 9, that it encompasses the flat shaft 89 of the insert tool 88 in a cassette-like manner and thereby absorbs the bending forces that occur during work, so that no local stresses can occur which destroy the housing shells 12 , 14 would lead.

The longitudinal guide 82 is designed as in the housing 12 , 14 insertable cubes or cuboids with a continuous guide slot 67 , see FIGS . 6 and 8, for the passage of the shaft 89 of the insert tool 88 . The longitudinal guide 82 has, on its side facing the driver 68, a notch 83 which centers the head 65 of the driver 68 which engages in the recess 90 of the clamping end 77 of the insert tool 88 , which engages in the inserting end 77 of the insert tool 88 and this take the projection 70 carries.

Referring to FIG. 5, the local longitudinal guide 87 is penetrated by a transverse recess 81st To this is aligned in the lower housing shell 14, a recess 81 'through which 88 lubricant can be introduced when the tool is not used or through which the connection between the two plastic shells 12 , 14 can be made or released by means of a screwdriver.

The longitudinal guide 82 does not have to be cuboid-shaped, but can also have a different outer design as required.

Fig. 6 shows how the Fig. 3, the upper bearing from the drive shaft 50 in the housing 12 , 14 as a detail, the compression spring 42 , the central recess 43 , the disc 44 , the ball 46 and the upper region of the output shaft 50 clearly are recognizable.

Can see FIGS. 1 to 7 that the tool facing the bearing point of the driven shaft 50 through the rolling bearings 58 supporting bearing bush 56 is formed, the NEN on egg as a ball screw acting annular wedge 57 towards ei nem counter ring wedge 63 (Fig. 10) of the Housing shell 14 is axially adjustable after loosening the anti-rotation device 62 and, after dismantling the key 76 and the driver 68 , from the outside z. B. for a wrench or the like. To rotate Ver is accessible.

The bearing bush 56 could wear a steep external thread instead of the ring wedge 57 , which would have to be screwable into a suitable mating thread.

The anti-rotation of the bearing bush 56 is designed as an externally toothed clamping ring 62 which engages with two teeth 61 arranged on its inside in two opposite grooves 59 on the lower outside of the bearing bush 56 . The clamping ring 62 holds with its external toothing on projections of the housing 11 , in particular the housing seschale 12 , locked against rotation by the teeth between cams 67 ( FIG. 10) at the bottom of the opening 60 . He thus secures the bearing bush 56 against rotation ge compared to the housing 11 .

The compression spring 64 is supported on the clamping ring 62 , with which it prestresses it axially with respect to the bearing bush 56 or with respect to the housing 11 and thus holds it in particular on the cams. The clamping ring 62 is non-rotatably connected to the housing shell 14 via external teeth.

Referring to FIGS. 1 to 7, the tool 88 occurs and 188 from the area covered by a sealing cap 86 from the opening 34 prior to its portion of the housing 11. A knife protection 94 can be placed over the cutting edge or the working end 92 of the tool 88 or 188 , which secures the cutting edge against damage and protects the operator against injury from the cutting edge, in particular when the handheld power tool 10 is being transported.

. Referring to Figures 5 and 7 as a perforated disc formed a catch. 69 - in contrast to that according to Figures 1 to 3 a connecting rod designed driver 68th In a central bore 72 'of the driver 69 engages an eccentric pin 51 of the output shaft 50 , which is significantly shorter than the eccentric pin 52 shown in FIGS. 1 to 3. This shorter dimension is necessary because the eccentric pin 51 itself out of engagement with it the recess 91 of the clamping of the insert tool 188 is available so that the insert tool 188 can be removed transversely to the eccentric pin 51 - can be pushed past its free end.

The central bore 72 'can of course, like the bore 72 shown in FIGS. 2 and 4, contain a needle bearing 73 in order to transmit the movement of the eccentric pin 51 with little friction to the driver 69 and the insert tool 188 .

Over the free end of the eccentric pin 51 out 71 extends concentrically to the recess 91 extending, annular collar-like projection of the driver 69th This engages in the recess 91 in the form of an elongated hole in the clamping end 77 of the tool 188 . The slot-like recess 91 is arranged near the free end of the clamping end 77 , its longitudinal extension transverse to the direction of movement of the tool 188 and at least by the stroke h or by twice the eccentricity of the eccentric pin 51 is longer than the diameter of the eccentric pin 51st The width of the elongated hole 91 is dimensioned such that the projection 71 can engage in it with play in wesentli.

Means that prevent unwanted rotation of the driver 69 with the eccentric pin 51 due to the bearing friction between the eccentric pin 51 and the driver 69 in the bore 72 'are not shown.

The position of the front working end 92 or the cutting edge of the insert tools 88 , 188 with respect to the front opening 34 of the housing 11 should be the same in all exemplary embodiments according to FIGS . 1, 2, 4, 5 and 7. For this reason, the shaft 89 of the insert tool 188 according to FIGS . 5, 7 is longer compared to that according to FIGS . 2, 4, because the point of engagement between the shaft 89 and the driver 69 according to FIGS. 5, 7 continues inside the housing 11 lies.

The Fig. 8 shows an insertion tool 288, the calcd for the saddle 10 according to FIGS. 1 to 4 suitable. In contrast to the insert tool 88 according to FIGS. 1 to 4, the insert tool 288 has a recess 93 in the clamping end 77 , which is designed as an elongated hole extending longitudinally to the direction of movement, the width of which is coordinated with the outside diameter of the pin 70 which is circular in cross section. Its longitudinal extent is greater by the stroke h or by twice the eccentricity of the eccentric pin 52 than the outer diameter of the eccentric pin 52 . Thus, with rotating engine, the insert tool 288 is only reciprocally moved or driven when it is acted upon by a frontal counterforce, so that the projection 70 can be supported on the front edge 193 of the recess 90 . As a result, when the motor 16 is switched on and when the insert tool 288 is lifted off the workpiece, it stops, so that the energy consumption, the noise and the wear on the longitudinal guide 82 and on all parts of the scraper 10 which transmit motion, for. B. between the participant 68 and the clamping end 77 of the insert tool 288 , is kept low.

A comparison of the clamping ends 77 of the insertion tools 88, 188, 288 according to FIGS. 1 to 8 shows that the recess 90 of the insert tool 88 further from the free end of a draw 77 removed as the recess 91 of the insertion tool 188 and when the recess 93 of the insert tool 288 according to FIGS. 5 and 7.

FIG. 9 shows the longitudinal guide 82 according to FIG. 1 as an enlargement . The longitudinal guide 82 carries rolling elements 78 and 84 configured as needles, which are arranged in front of and behind the rectangular, flat guide slot 67 and on which the tool 88 , 188 , 288 can support rolling. The rolling bodies 78 and 84 are mounted in corresponding slots 85 of the longitudinal guide 82 . This arrangement of the rolling elements 78 , 84 significantly reduces the sliding friction in the longitudinal guide 82 , increases their load capacity and reduces heat development and wear on the scraper 10 and keeps bending forces of the insert tool 88 , 188 and 288 away from the housing 11 .

The cooperation between the longitudinal guide 82 and the pleuelartigen driver 68, Figs. 1, 2 and 4. The tang 68 has the projection 70 supporting the head part 65, the environment in which serves as a guide slot Einker 83 of the longitudinal guide 82 engages rotatably. This ensures that the head 65 and thus the driver 68 inside the housing 11 is also secured against rotation if the scraper 10 is not equipped with a tool 88 , 288 and if the motor 16 starts in this state becomes.

In Fig. 10, the upper and lower housing shells 12 , 14 are shown pulled apart parallel to the axis, the inclined profile of the dividing edge 15 , which is bent at the front, being clear in both housing shells. The upper housing seschale shows particularly clearly the mandrel 41 and the concentric bore 45 for receiving the not shown here, but shown in Figs. 1 to 3, 5, 6 compression spring 42 , which in turn carries the pin 44 'with the washer 44 for axial support on the ball 46 or on the output shaft 50 . A circular recess serving as a bearing receptacle 38 , which is arranged concentrically to the mandrel 41 and into which the annular slide bearing 40 can be inserted, is clearly recognizable. In addition, the front transverse wall 13 is particularly clearly visible near the opening 34 for the passage of the tool 88 (not shown here).

It is also clear that the inner tread 47 of the sliding bearing 40 conically, downwards towards the housing shell 14 extends. For this purpose, it has proven to be particularly advantageous to have an approximately 7 mm long area of the tread opening downwards at an angle of 5 ° in total, with an approximately 2 to 3 mm long straight cylindrical area of the tread adjoining the top. This allows tilting of the output shaft 50 within certain limits without impairing the function of the scraper or without damaging or destroying the plain bearing 40 .

The lower housing shell 14 clearly shows the mating ring wedge surface 63 , on which the ring wedge 57 is supported on the collar 55 of the bearing bush 56 , so that when the bearing bush 56 rotates counterclockwise, it moves axially. Since the output shaft 50 is supported as shown in FIGS. 1, 2 and 5 axially on the bearing bush, it is carried along axially during rotation of the La gerbuchse 56, thereby the one set of the axial play of the output shaft 50 relative to the upper housing shell 12 and opposite the ball 46 , the disc 44 and the mandrel 41 is possible.

In addition, on the housing shell 14 near the opening 34 ei ne annular groove 25 for holding the sealing cap 86 ( Fig. 1) can be seen and a receiving tunnel 33 with an insertion opening 35 for insertion and for holding the not shown Darge longitudinal guide 82 , which is the Ribs 37 39 clamped without play. The opening 60 for guiding and receiving the push button 76 ( FIG. 1) can also be seen.

The adjusting means in the form of the bearing bush 56 could also be arranged instead of in the lower housing shell 14 in the upper housing shell 12 , in which case instead of the needle bearing 73 the plain bearing 40 could sit in the bearing bush 56 .

Claims (21)

1. Electric hand machine tool ( 10 ) with a housing ( 11 ) which holds a motor ( 16 ) and an output shaft ( 50 ) with at least two bearing points and with an eccentric pin ( 51 , 52 ) or the like which sits on the output shafts de, the ent an insert tool ( 88 , 188 , 288 ) which can be moved back and forth and which is coupled to the eccentric pin ( 51 , 52 ) can be fitted with a clamping end ( 77 ) held in the housing ( 11 ), the insert tool ( 88 , 188 , 288 ) and the eccentric pin ( 51 , 52 ) has a driver ( 68 , 69 ) for transmitting motion, and wherein the driver ( 68 , 69 ) has a bore ( 72 , 72 ') into which the eccentric pin ( 51 , 52 ) rotatably engages , characterized in that one, preferably the tool-facing bearing point ( 58 ) of the output shaft ( 50 ) with at least one output shaft ( 50 ) relative to the housing ( 11 ) axially adjustable adjusting means ( 56 ) in operative connection g stands.
2. Machine according to claim 1, characterized in that the adjusting means ( 56 ) as, in particular with a helical thread ( 57 , 63 ), in the housing ( 11 ) axially adjustable bearing bush ( 56 ) is designed.
3. Machine according to claim 2, characterized in that as a steep thread, the bearing bush ( 56 ) on the underside of an upper, radial collar ( 55 ) carries at least one ring wedge ( 57 ), which is associated with a housing-side counter-ring wedge ( 63 ) as a support surface is.
4. Machine according to one of claims 1 to 3, characterized in that the bearing bush ( 56 ) with a Verdrehsi insurance ( 62 ) relative to the housing ( 11 ) can be secured in position.
5. Machine according to claim 4, characterized in that the anti-rotation is designed as an externally toothed clamping ring ( 62 ), the anti-rotation, in particular with at least one inner tooth ( 61 ) in at least one groove ( 59 ) on the lower outside of the bearing bush ( 56 ) engages and overlaps the bearing bush ( 56 ), in particular from the side facing the ring wedge ( 57 ).
6. Machine according to claim 5, characterized in that the clamping ring ( 62 ) with its external toothing on cracks before the housing ( 11 ), in particular on cams ( 67 ) at the bottom of the opening ( 60 ) of the housing shell ( 12 ), latches .
7. Machine according to claim 6, characterized in that a compression spring ( 64 ) is supported on the clamping ring ( 62 ) and holds it relative to the bearing bush ( 56 ) or the housing ( 11 ).
8. Machine according to one of claims 4 to 7, characterized in that the anti-rotation device ( 62 ) on a, especially tool-facing, externally accessible side of the housing ( 11 ) from its holding position is releasably arranged.
9. Machine according to claim 6, 7 or 8, characterized in that a push button ( 76 ) for releasing the insert tool ( 88 ) is supported on the compression spring ( 64 ), so that it is also the same as a return spring for the driver ( 68 ) and the push button ( 76 ) is used, the push button ( 76 ) being secured against falling out of the machine ( 10 ).
10. Machine according to one of claims 1 to 9, characterized in that the output shaft ( 50 ) is axially resiliently supported on the side remote from the tool relative to the housing ( 11 ).
11. Machine according to claim 10, characterized in that the output shaft ( 50 ) is supported via a spring-mounted, axially displaceable ball ( 46 ) relative to the housing ( 11 ).
12. Machine according to claim 11, characterized in that in the upper housing shell ( 12 ) a compression spring ( 42 ) is arranged, one end engages a housing-side mandrel ( 41 ) and the other a support plate ( 44 ) carrying pin ( 44 ') and is supported on the support disc ( 44 ) with respect to the ball ( 46 ) which is located in a recess ( 43 ) in the front end in the upper end of the drive shaft ( 50 ) remote from the tool and protrudes beyond the edge of the recess ( 43 ).
13. Machine according to claim 12, characterized in that in the upper housing shell ( 12 ) an annular slide bearing ( 40 ) for mounting the upper end of the output shaft ( 50 ) is arranged, the tread ( 47 ) at least be rich, conical , so that misalignment of the output shaft ( 50 ) relative to the central axis of the sliding bearing ( 40 ) are compensated.
14. Machine according to claim 12, characterized in that the running surface ( 47 ) of the slide bearing ( 40 ) in its upper region ( 47 ''), preferably over a length of about 2 to 3 mm, extends cylindrically and downwards on it closing into a conical, preferably about 7 mm long area ( 47 ') opening at an angle of about 5 °.
15. Machine according to one of the preceding claims, characterized in that the driver ( 68 , 69 ) by moving by means of a push button ( 76 , 176 ) except for a handle to the insert tool ( 88 , 188 , 288 ) can be brought, where by the insert tool ( 88 , 188 , 288 ) separated from the drive and is therefore easy to remove.
16. Machine according to one of the preceding claims, characterized in that the insert tool ( 88 , 188 , 288 ) in a longitudinal guide ( 82 ) in the housing ( 11 ) is axially displaceable, the flat clamping end ( 77 ) of guide elements ( 82 ) is gripped with little play.
17. Machine according to one of the preceding claims, characterized in that the insert tool ( 88 , 188 , 288 ) protrudes from an opening ( 34 ) of the front region of the housing ( 11 ) covered by a sealing cap ( 86 ), where the Sealing cap ( 86 ), in particular sealing, is supported on a set tool ( 88 , 188 , 288 ).
18. Machine according to one of the preceding claims, characterized in that the insert tool ( 88 , 188 , 288 ) carries a cutting edge running transversely to its direction of movement and serves as a chisel, spatula or the like.
19. Machine according to one of the preceding claims, characterized in that one of the housing shells ( 12 , 14 ) has a longitudinal guide ( 82 ) encompassing, box-like profile with a rear and front for the passage of the insert tool ( 88 , 188 , 288 ) open receiving tunnel ( 33 ) ent.
20. Hand tool with a longitudinally divided Scha len ( 12 , 14 ) existing housing ( 11 ), which takes an angular gear with an output shaft ( 50 ) on both ends, in particular according to one of the preceding claims, characterized in that the housing ( 11 ) is formed from two housing shells ( 12 , 14 ) which are assembled together with the parting plane running horizontally in the working position, the output shaft ( 50 ) being rotatably supported in one bearing ( 40 ) in each of the two housing shells ( 12 , 14 ).
21. Machine according to claim 20, characterized in that the housing ( 11 ) with the two housing shells ( 12 , 14 ) and the parting plane formed by dividing edges ( 15 ), in particular in the region of the neck ( 32 ), in an S-shaped working position bent downward.
DE19547332A 1995-12-19 1995-12-19 Electric hand machine tool Ceased DE19547332A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19547332A DE19547332A1 (en) 1995-12-19 1995-12-19 Electric hand machine tool

Applications Claiming Priority (8)

Application Number Priority Date Filing Date Title
DE19547332A DE19547332A1 (en) 1995-12-19 1995-12-19 Electric hand machine tool
JP9513779A JP2000501029A (en) 1995-12-19 1996-10-26 Hand-held power tool machine
DE1996511234 DE59611234D1 (en) 1995-12-19 1996-10-26 Electric hand tool
CN96199108A CN1112982C (en) 1995-12-19 1996-10-26 Electric hand tool machine
DE1996509803 DE59609803D1 (en) 1995-12-19 1996-10-26 Electric hand machine tool
PCT/DE1996/002044 WO1997022437A1 (en) 1995-12-19 1996-10-26 Electrical tool machine
EP99103025A EP0916456B1 (en) 1995-12-19 1996-10-26 Electric hand tool
EP96934436A EP0868256B1 (en) 1995-12-19 1996-10-26 Electrical tool machine

Publications (1)

Publication Number Publication Date
DE19547332A1 true DE19547332A1 (en) 1997-06-26

Family

ID=7780506

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19547332A Ceased DE19547332A1 (en) 1995-12-19 1995-12-19 Electric hand machine tool

Country Status (5)

Country Link
EP (2) EP0916456B1 (en)
JP (1) JP2000501029A (en)
CN (1) CN1112982C (en)
DE (1) DE19547332A1 (en)
WO (1) WO1997022437A1 (en)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999015316A1 (en) * 1997-09-24 1999-04-01 Robert Bosch Gmbh Hand-held machine-tool having a front and a rear parts which are offset relative to the housing for two-hand use
EP1077106A2 (en) * 1999-08-16 2001-02-21 Robert Bosch Gmbh Portable power tool
EP1077107A2 (en) * 1999-08-16 2001-02-21 Robert Bosch Gmbh Portable power tool
FR2797604A1 (en) * 1999-08-16 2001-02-23 Bosch Gmbh Robert Portable machine
DE19938162A1 (en) * 1999-08-16 2001-03-01 Bosch Gmbh Robert Hand machine tool system
EP1080838A2 (en) * 1999-08-20 2001-03-07 Robert Bosch Gmbh Portable power tool
WO2002040294A1 (en) * 2000-11-15 2002-05-23 Scintilla Ag Tool holder
DE10058894A1 (en) * 2000-11-23 2002-06-06 C & E Fein Gmbh & Co Kg Tool, e.g. a cutter for cutting through sealed joints, has an attachment mechanism for connection to a drive shaft and a safety element that serves to tension a working part against a holder
DE19844806B4 (en) * 1998-09-30 2010-10-14 Robert Bosch Gmbh Hand tool, in particular Schnursäge
WO2012045679A3 (en) * 2010-10-04 2012-06-28 Robert Bosch Gmbh Oscillating hand-held power tool
WO2012089637A2 (en) * 2010-12-30 2012-07-05 Robert Bosch Gmbh Clamping device for a hand-held power tool
EP2436489A3 (en) * 2010-10-04 2015-04-01 Robert Bosch GmbH Material distribution unit
CN106424932A (en) * 2016-11-17 2017-02-22 湖州峰霞五金贸易有限公司 Force balance handsaw

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7980325B2 (en) * 2004-01-16 2011-07-19 Credo Technology Corporation Rotating shaft locking mechanism
CN201061862Y (en) * 2007-06-25 2008-05-21 南京德朔实业有限公司 Electric grinding tool
US20090272556A1 (en) * 2008-05-05 2009-11-05 Ingersoll-Rand Company Angle head and bevel gear for tool
JP2010155291A (en) * 2008-12-26 2010-07-15 Makita Corp Power tool
US9669535B2 (en) * 2012-08-27 2017-06-06 Ingersoll-Rand Company Power tool housing construction
CN103894672B (en) * 2014-03-28 2017-01-11 潘杭 Grooving machine for vertical rectangular grooves of plates
CN106424933B (en) * 2015-08-06 2018-06-19 南京德朔实业有限公司 Reciprocating saw
CN105855917B (en) * 2016-06-06 2018-01-05 石狮市川朗机械设计有限公司 A kind of band processing head and the reciprocating organisation of working of energy
CN106346363B (en) * 2016-11-18 2018-05-01 常州市武进大成工贸有限公司 carving machine

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2705980A (en) * 1953-09-08 1955-04-12 Walter A Papworth Portable power driven reciprocating and oscillating cutting tool
US3203095A (en) * 1963-07-29 1965-08-31 Gen Electric Power-operated knife
US4311063A (en) * 1980-06-02 1982-01-19 The Singer Company Bearing and bearing mount and tools incorporating same
DE3448276C3 (en) * 1984-08-01 1997-06-05 Foell Remswerk Jigsaw with a clamping device
JPH0351540Y2 (en) * 1985-08-02 1991-11-06
EP0548717A1 (en) * 1991-12-21 1993-06-30 Robert Bosch Gmbh Hand tool machine with angle drive transmission
DE4235278A1 (en) * 1992-10-20 1994-04-21 Bosch Gmbh Robert Hand machine tools, in particular motor files
WO1994014574A1 (en) * 1992-12-21 1994-07-07 Matricbrook Pty. Ltd. Power driven ratchet wrench
DE4342986C2 (en) * 1993-12-16 1998-08-13 Metabowerke Kg Motorized hand tool with belt drive

Cited By (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999015316A1 (en) * 1997-09-24 1999-04-01 Robert Bosch Gmbh Hand-held machine-tool having a front and a rear parts which are offset relative to the housing for two-hand use
DE19844806B4 (en) * 1998-09-30 2010-10-14 Robert Bosch Gmbh Hand tool, in particular Schnursäge
DE19938176A1 (en) * 1999-08-16 2001-03-08 Bosch Gmbh Robert Hand tool
FR2797604A1 (en) * 1999-08-16 2001-02-23 Bosch Gmbh Robert Portable machine
DE19938162A1 (en) * 1999-08-16 2001-03-01 Bosch Gmbh Robert Hand machine tool system
DE19938161A1 (en) * 1999-08-16 2001-03-01 Bosch Gmbh Robert Hand tool
DE19938175B4 (en) * 1999-08-16 2005-08-11 Robert Bosch Gmbh Hand tool with a guide bearing for an insert tool
EP1077107A2 (en) * 1999-08-16 2001-02-21 Robert Bosch Gmbh Portable power tool
DE19938175A1 (en) * 1999-08-16 2001-03-08 Bosch Gmbh Robert Machine with reciprocating tool has at least three bearing elements to form the bearing for the tool
EP1537948A1 (en) * 1999-08-16 2005-06-08 Robert Bosch Gmbh Portable power tool
GB2355220A (en) * 1999-08-16 2001-04-18 Bosch Gmbh Robert Hand machine tool for use as a scraper
GB2355220B (en) * 1999-08-16 2001-09-05 Bosch Gmbh Robert Hand tool machine
EP1077106A2 (en) * 1999-08-16 2001-02-21 Robert Bosch Gmbh Portable power tool
EP1077107A3 (en) * 1999-08-16 2002-06-05 Robert Bosch Gmbh Portable power tool
EP1077106A3 (en) * 1999-08-16 2002-06-05 Robert Bosch Gmbh Portable power tool
DE19939171A1 (en) * 1999-08-20 2001-03-08 Bosch Gmbh Robert Hand tool
EP1080838A2 (en) * 1999-08-20 2001-03-07 Robert Bosch Gmbh Portable power tool
US6810970B1 (en) 1999-08-20 2004-11-02 Robert Bosch Gmbh Hand power tool
EP1080838A3 (en) * 1999-08-20 2002-06-05 Robert Bosch Gmbh Portable power tool
WO2002040294A1 (en) * 2000-11-15 2002-05-23 Scintilla Ag Tool holder
US6865813B2 (en) 2000-11-23 2005-03-15 C. & E. Fein Gmbh & Co. Kg Tool having a holder for mounting on a drive shaft
DE10058894A1 (en) * 2000-11-23 2002-06-06 C & E Fein Gmbh & Co Kg Tool, e.g. a cutter for cutting through sealed joints, has an attachment mechanism for connection to a drive shaft and a safety element that serves to tension a working part against a holder
CN1321783C (en) * 2000-11-23 2007-06-20 C.&E.泛音有限公司 Cutting tool with fixture fixed to drive axle
WO2012045679A3 (en) * 2010-10-04 2012-06-28 Robert Bosch Gmbh Oscillating hand-held power tool
EP2436489A3 (en) * 2010-10-04 2015-04-01 Robert Bosch GmbH Material distribution unit
WO2012089637A2 (en) * 2010-12-30 2012-07-05 Robert Bosch Gmbh Clamping device for a hand-held power tool
WO2012089637A3 (en) * 2010-12-30 2012-09-07 Robert Bosch Gmbh Clamping device for a hand-held power tool
CN106424932A (en) * 2016-11-17 2017-02-22 湖州峰霞五金贸易有限公司 Force balance handsaw
CN106424932B (en) * 2016-11-17 2018-06-29 湖州峰霞五金贸易有限公司 A kind of stress balance handsaw

Also Published As

Publication number Publication date
CN1205664A (en) 1999-01-20
EP0916456A2 (en) 1999-05-19
EP0868256B1 (en) 2002-10-16
JP2000501029A (en) 2000-02-02
EP0868256A1 (en) 1998-10-07
EP0916456B1 (en) 2005-06-08
EP0916456A3 (en) 2002-09-25
WO1997022437A1 (en) 1997-06-26
CN1112982C (en) 2003-07-02

Similar Documents

Publication Publication Date Title
EP1577065B1 (en) Blade and motor carrier with height/angle adjustment mechanism
US5649853A (en) Drill bit grinding machine
EP2771148B1 (en) Planer accessory tool for an oscillating power tool
CA2453205C (en) Clamping arrangement for receiving a saw blade in multiple orientations
EP0470046B1 (en) Drilling device with suction cleaner
JP3868474B1 (en) Machining tools
US8215295B2 (en) Cutting or sawing machine
JP3331216B2 (en) Improved cutting tool
US7254892B2 (en) Support mechanism for a reciprocating tool
RU2113578C1 (en) Device for grinding rails
US9272347B2 (en) Drive mechanism for a reciprocating tool
US9283630B2 (en) Reciprocating tool
US5940977A (en) Reciprocating saw with an angular blade drive and rotatable blade holder
JP2655282B2 (en) Drive for impact tools
US7325315B2 (en) Clamping arrangement for receiving a saw blade in multiple orientations
DE60118854T2 (en) Reciprocating cutting tool
EP0615483B1 (en) Eccentric-disc grinder
USRE33335E (en) Device for attaching a tool
DE10358033B4 (en) Drive arrangement
US6502317B2 (en) Blade ejection mechanism for a saw blade clamping arrangement of a power tool
US20050178012A1 (en) Reciprocating saw
KR100567613B1 (en) Drilling tools
AU2004295286B2 (en) Device for sharpening chain saw teeth
US5794352A (en) Saw blade clamping arrangement for a power tool
US5967886A (en) Hand power tool for flat machining

Legal Events

Date Code Title Description
8110 Request for examination paragraph 44
8131 Rejection