CN1078834C

CN1078834C - Portable abrasive belt grinding machine

Info

Publication number: CN1078834C
Application number: CN98104032A
Authority: CN
Inventors: G·贝尔纳; R·达梅尔茨; J·查道
Original assignee: Robert Bosch GmbH
Current assignee: Robert Bosch GmbH
Priority date: 1997-02-04
Filing date: 1998-01-27
Publication date: 2002-02-06
Anticipated expiration: 2018-01-27
Also published as: CN1190050A; JPH10217093A; GB2321611B; FR2759009B1; GB9801620D0; GB2321611A; FR2759009A1; DE19704088A1

Abstract

A hand band sander, comprising a housing, which carries an on/off switch as well as an electrical connection and which accommodates a motor and a gear unit for rotating an abrasive band, which is guidable by means of a heel of a guide shoe, which heel defines the flat working surface of said abrasive band, is easily and quickly convertible for fine machining small parts in that the hand band sander carries at least one externally accessible threaded bore, into which may be screwed a clamping screw of a subframe, by means of which clamping screw the hand band sander is fixable to the clamping side of the subframe.

Description

Portable abrasive belt grinding machine

The present invention relates to a kind of portable abrasive belt grinding machine that can combine and a kind of bearing that can combine with a portable abrasive belt grinding machine with a bearing.

Disclose different size and difform portable abrasive belt grinding machine in the prior art, these belt sanders can combine with bearing with clamping, the flour milling that makes the abrasive band up, wherein, light, little workpiece can and be sent to flour milling by two-handed hand-held.

Under situation about clamping on the bearing, these disclosed portable abrasive belt grinding machines have fixture.Backstop can be fixed on these fixtures, and little workpiece can be bearing on these fixtures with different angle positions adjustablely.In view of the above, workpiece can be by accurately grinding on different positions.

The shortcoming of the portable abrasive belt grinding machine that these are disclosed, can combine with bearing is, heavier and these belt sanders of these belt sanders have a unique operating position only with respect to bearing.

Compared with prior art, the advantage of portable abrasive belt grinding machine of the present invention and bearing is, weight little and with the situation of bearing combination under can adjust the different stop dog positions and the operating position of portable abrasive belt grinding machine very nimblely.In addition, the backstop by can varied location can make workpiece obtain multiple variable angle orientation with respect to the abrasive band side plate of portable abrasive belt grinding machine.

Another advantage is that bearing is made of four screws of two usefulness outer casing member interconnective, half shelly.Bearing can advantageously be fixed on the workbench on three different positions because bearing has the backstop limit three different sides, but these backstop limit side stop types rest on edge of table or similarly on the limit and prevent that bearing from moving or reversing.In view of the above, a unique screw clamp just is enough to bearing is fixed on the workbench.Particularly advantageously be, by the mandrel in the hole of four in bearing slides that accurately insert portable abrasive belt grinding machine ordinatedly and shell, can be clamped in portable abrasive belt grinding machine on the bearing easily and quickly, wherein, a central tommy screw screws in the threaded hole of slide.

Two mandrels after leaning on, that insert the rear portion of shell are used to bear and affact on the belt sander, bigger torsion when carrying out the grinding operation in fixing position.Advantageously, for fear of the overdetermination to the belt sander position, the aperture in the portable abrasive belt grinding machine is bigger than axle diameter.In view of the above, mandrel just abuts in the hole after occurring reversing slightly because of the operating force between abrasive band and the workpiece when the portable abrasive belt grinding machine grinding.Then, the continuing to reverse of portable abrasive belt grinding machine prevented reliably, because the power between workpiece and the abrasive band is always along the equidirectional effect and portable abrasive belt grinding machine is moved towards the anti-stop dog position of turning round of relative bearing.

Another advantage is, central tommy screw be one unique, be not located in the working of plastics in the bearing with losing, wherein, pass through head and sink in the bottom surface of bearing, make the upper limb that passes through head not protrude in the bearing bottom profile.Have axial dirt holding tank on the threaded of central authorities' tommy screw, also can guarantee its function so that have in the screw thread in portable abrasive belt grinding machine under the situation of dirt.

A special advantage of the present invention is that adjustable can make workpiece lead with respect to the abrasive band with dismountable angle backstop.When primary importance, angle backstop can be installed in before the tip of portable abrasive belt grinding machine on the unique fixed position.For this reason, in bearing, exist one that have a transverse groove at the one end and have a groove standard nut of fixedly inserting, circular arc at its other end.Angle backstop has a slide block circular arc, that transverse joint is arranged in the end.When assembling, at first the slide block of transverse joint and circular arc is inserted in the deep-slotted chip breaker, rotational angle backstop screws in the nut of fixedly inserting until its threaded portion of adjusting screw subsequently.At this moment, transverse joint slide into deep-slotted chip breaker following and thereby anti-limited slip block deviate from.

In the second place of angle backstop, angle backstop and tape side plate are vertically or relative side plate is adjustable is positioned on the side relative with the tip of abrasive band side plate to 135 ° of angles.The slide block of angle backstop is inserted in the deep-slotted chip breaker equally, and the length of this deep-slotted chip breaker can make slide block move to 45.By the readable angle position that goes out angle backstop of the scale on the clamping side of bearing.

Because the weight of bearing is little, bearing also can be used as revocable, firm instrument association with dress portable abrasive belt grinding machine thereon and is used for special application target.

Describe one embodiment of the present of invention in detail by accompanying drawing below.Accompanying drawing is depicted as:

The stereogram of an embodiment of Fig. 1 portable abrasive belt grinding machine of the present invention,

Fig. 2 is equipped with the stereogram of the bearing of portable abrasive belt grinding machine on it,

The exploded view of Fig. 3 bearing of the present invention,

The stereogram of the angle backstop that Fig. 4 is used for locating on bearing,

The view of the tommy screw of the fragmentary, perspective view of Fig. 5 bearing and portable abrasive belt grinding machine and embedding portable abrasive belt grinding machine,

Fig. 6,7,8 operating positions with three-favour are clamped in the bearing on the workbench and adorn the stereogram of portable abrasive belt grinding machine thereon,

The stereogram with the slide that is used for fixing the fixture on bearing of Fig. 9 portable abrasive belt grinding machine.

Portable abrasive belt grinding machine 10 shown in Figure 1 has shape long and narrow, the spray gun shape, and the front portion in its abrasive band 20 is the working face of wedge shape, and wherein, the shell 12 of belt sander 10 vertically straight stretching backward, is used to hold gearbox and drive motors.Long shell 12 is by long forming with half short shell 112,212, and this two and half shell engages at opposite joint placed in the middle 312 places.At the rear portion, shell 12 one of supporting are used for driving the switch 16 that makes abrasive band 20 motor rotating (not shown).The dust collection connection pipe 2101 adjacent with cable 18 of cable 18 and not shown dust absorption passage stretches out from the rear end of shell 12, and wherein, the regulating wheel 105 of a dust absorption passage and a rotating speed preselector is adjacent.In addition, have ventilation slot 106 at the rear portion of shell 12.In the face of half long shell 112, half short shell 212 constitutes a neutral 412 in the front portion of the wedge shape of shell 12, and abrasive band 20 so obtains guiding in this neutral 412, and promptly from side direction, the profile of abrasive band 20 and long half shell 112 is centering basically.

The abrasive band is by a slide 33 supporting, and this slide is a wedge structure, is provided with two abrasive band side plates 133,233 and at a pair of slewing rollers 31 of its tip 333 area supportings.This is rotatably supported in the fork 35 slewing rollers 31.

The housing axis of representing with chain-dotted line 512 is represented the extending longitudinally of portable abrasive belt grinding machine 10.

A knob 139 is located at the front portion of half long shell 112, in order to support the center in the steering gear 34 rapid adjustment abrasive bands 20 of slewing rollers 31 by deflection.

Be provided with a tensioning/release lever near knob 139 places, in order to change abrasive band 20, this tensioning/release lever discharges abrasive band 20 to lower swing the time.

Bearing 1010 is used to support portable abrasive belt grinding machine 10 shown in figure 2.The bottom surface 1032 of this bearing is located on the workbench 1028, makes the backstop limit of bearing abut in the distolateral last of workbench 1028 and control bearing, prevents that bearing from reversing.Among screw clamp 1024 penetrates bearing 1010 a plurality of of inserting in mouthfuls 1025 and bearing 1010 is fixed on the workbench 1028.First inserts mouth 1025 is positioned on the long narrow side 1034, and the narrow side of this length carries out the transition to the narrow side 1036 of the weak point of bearing 1010.By one in Fig. 3, be shown specifically be fastened on screw (dish-shaped screw or tommy screw), portable abrasive belt grinding machine 10 is clamped on the clamping area 1030 with the clamping area 1030 with 1032 opposites, bottom surface of its outside, abrasive band faces seat 1010.On clamping area 1030, can install two angle backstops 1014, these two angle backstops can its circular arc plastic slide block selectively in the

insertion groove

1018 and 1019 and in groove or fixing, or in a definite angular range, adjust movably.After reaching the desired position, angle backstop can be fixed by rotating pinching screw 1012.Be contained in backstop 1014 on the tip left side of portable abrasive belt grinding machine 10 and can make workpiece lean against on this backstop 1014 slightly side plate 133, thereby but hyperesthesia ground grinding is very little, that be difficult to machining and the instrument workpiece that is difficult to process by hand near abrasive band 20.When workpiece leans against on the angle backstop 1014 that right-hand, its angle position adjustable extent of being installed in line of vision are 45 ° to 90 ° (every lattice scale is 15 °), but the end face of grinding work piece or scarf.In Fig. 8, be shown clearly in this position.

Fig. 3 shows the exploded view of bearing 1010, wherein can clearly find out angle backstop 1014, slide block 1016 and structure pinching screw 1012.Also can clearly find out screwed hole 102, threaded steady pin 1020 on the slide 33 that is used for embedding portable abrasive belt grinding machine and inserting portable abrasive belt grinding machine 10 of

groove

1018,1019 and tommy screw.

Can see vertically four mandrels or the bearing pin 1022 that project upwards from clamping area 1030, wherein, from line of vision, two thicker mandrels 1022 that are arranged in left insert two corresponding mating holes 1102 (Fig. 9) of slide 33 and see from line of vision at sidepiece and are arranged in two right-hand thin mandrels 1022 insert the shell 12 of portable abrasive belt grinding machine 10 at sidepiece unshowned hole.

Fig. 4 shows the detail drawing of angle backstop 1014 and the screw 1012 and the plate 1017 that reclines.

For the tommy screw 1020,1021 that clamps portable abrasive belt grinding machine is described, Fig. 5 shows the perspective view of bearing 1010 and portable abrasive belt grinding machine.

Fig. 6 shows portable abrasive belt grinding machine 10 and abuts in bearing 1010 on the workbench 1028 with its short narrow side 1036, and wherein, flour milling 133 stretches perpendicular to workbench.Angle backstop 1014 is installed on the side of the tip that deviates from portable abrasive belt grinding machine 10, and as described in Figure 2, this side is used for angled of grinding.

Shown in Figure 7 identical with the situation shown in Fig. 2 and 3, workpiece is arranged on it and have only an angle backstop 1014 that on bearing 1010, is provided with near the tip of portable abrasive belt grinding machine 10.

Clamping side 1030 up the time, the flour milling 133 in abrasive band 20 and side plate are vertical the placements, and flour milling 133 is parallel to work top and stretches.In view of the above, can be convenient to add section chief's workpiece, workpiece obtains guiding can being parallel on the bearing 1010 on the plate 1017 that reclines that centering that side plate 33 ground in abrasive band abut in angle backstop 1014 is provided with.Angle backstop 1014 be as the auxiliary guide setting and its angle position can not be adjusted.This is provided with the position and is suitable for cutting, flat stone mill, chamfered edge and parallel grinding and cutting.

In Fig. 8, bearing 1010 is clamped on the workbench 1028 under its long 1034 situations about leaning on of narrow side, make the flour milling 133 in abrasive band 20 be parallel to the table surface stretching, extension, and basically as shown in Figure 6, can add the little end face and the inclined-plane of section chief's instrument especially expediently.

Fig. 9 shows a side view of the slide 33 of portable abrasive belt grinding machine 10 separately, and when portable abrasive belt grinding machine 10 was contained on the bearing 1010, this side was to the clamping area 1030 of bearing 1010.In view of the above, can clearly find out and be used for hole 102 that tommy screw 1020 inserts and two, the mutually corresponding holes 331 that are provided with and 332 and the position of abrasive band side plate 133 1022 that insert for mandrel.

Claims

1. portable abrasive belt grinding machine (10), has a shell (12), a switch (16) and cable (18) are arranged on this shell (12) and be used to hold one and drive abrasive band (20) motor rotating and a gearbox, abrasive band (20) can be guaranteed that the abrasive band has abrasive band side plate (331) guiding of the working face of especially flat by of slide, slide can link to each other with a bearing (1010), it is characterized in that, it is palp from the outside to have at least one on portable abrasive belt grinding machine (10), can can be fixed on portable abrasive belt grinding machine on the clamping side (1030) of bearing (1010) with this pinching screw for the screwed hole (102) of the pinching screw screw-in that is in the bearing side.

2. according to the described portable abrasive belt grinding machine of claim 1, it is characterized in that screwed hole (102) is positioned at the side of slide (33).

3. according to claim 1 or 2 described portable abrasive belt grinding machines, it is characterized in that portable abrasive belt grinding machine (10) side is fixed on the bearing, the plane in abrasive band (20) and the clamping area (1030) of bearing (1010) are intersected vertically.

4. according to the described portable abrasive belt grinding machine of claim 3, it is characterized in that, on bearing (1010), be useful on the mandrel (1022) that can insert slide (33) from the side.

5. according to the described portable abrasive belt grinding machine of claim 4, it is characterized in that, on bearing (1010), be useful on the mandrel (1022) that can insert shell (12) from the side.

6. according to the described portable abrasive belt grinding machine of claim 5, it is characterized in that bearing (1010) has a plurality of being used for and on the different positions bearing (1010) is being fixed on the insertion mouth that the screw clamp on the workbench (1028) enters.

7. according to the described portable abrasive belt grinding machine of claim 6, it is characterized in that bearing (1010) can be fixed on the workbench (1028) on three different bearing positions.

8. according to the described portable abrasive belt grinding machine of claim 5, it is characterized in that, the pinching screw of coherent head is imbedded in the profile of bottom surface (1032) of bearing (1010) and is passed the clamping area (1030) of bearing (1010) with its threaded part (1019), enter portable abrasive belt grinding machine to be clamped and by securely tightly on bearing (1010), in view of the above, bearing (1010) is placed on the workbench (1028) with flushing.

9. according to the described portable abrasive belt grinding machine of claim 8, it is characterized in that on the clamping area (1030) of bearing (1010), having at least one and be used to hold groove (1018,1019) angle backstop (1014) and that supply angle backstop (1014) to move.

10. according to the described portable abrasive belt grinding machine of claim 9, it is characterized in that, on the clamping area (1030) of bearing (1010), be provided with at least one adjustable angle backstop (1014).

11. according to the described portable abrasive belt grinding machine of claim 10, it is characterized in that, bearing (1010) be a hollow, by two and half shellies, the casing that particularly available screw constitutes its interconnective outer casing member.

12. be used for go up clamping the bearing (1010) that the described portable abrasive belt grinding machine of part (10) is chatted in one of ground supporting before as claimed in claim 1 at its clamping area (1030), it is characterized in that, bearing (1010) has pinching screw (1020), can be fixed on portable abrasive belt grinding machine (10) side on the bearing with this pinching screw, the plane in abrasive band (20) and the clamping area (1030) of bearing (1010) are intersected vertically.

13. according to the described bearing of claim 12, it is characterized in that, be useful on this bearing and can inserting mandrel (1022) in the slide (33) of portable abrasive belt grinding machine (10) at sidepiece.

14. according to the described bearing of claim 12, it is characterized in that, on this bearing, be useful on and insert the mandrel (1022) of shell (12) at sidepiece.

15., it is characterized in that having a plurality of being available for bearing (1010) to be fixed on the insertion mouth (1025) that the screw clamp on the workbench (1028) enters on this bearing according to the described bearing of claim 14 three different positions.

16. according to the described bearing of claim 15, it is characterized in that, pinching screw that can be screwed into belt sander to be clamped (10) is imbedded with its drive part that passes through header structure in the profile of bottom surface (1032) and with its threaded portion and is passed bearing (1010), outstanding its clamping area (1030) enters portable abrasive belt grinding machine to be clamped (10) and by securely being held on the bearing (1010), in view of the above, bearing (1010) is placed on the workbench (1028) with flushing.

17. according to the described bearing of claim 16, it is characterized in that it is a casing hollow, that be made of the outer casing member of two and half shellies that bearing (1010) has at least one to be used to hold groove (1018,1019) clamped adjustablely angle backstop (1014) and that move for this angle backstop (1014) and bearing (1010) on its clamping area (1030).