CN100560291C

CN100560291C - Structure for adjusting abrasive belt trajectory

Info

Publication number: CN100560291C
Application number: CNB2006100334864A
Authority: CN
Inventors: 张文奇
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-01-27
Filing date: 2006-01-27
Publication date: 2009-11-18
Anticipated expiration: 2026-01-27
Also published as: CN101007392A

Abstract

The invention discloses a kind of structure for adjusting abrasive belt trajectory, the intrinsic driving wheel of pivot between its support and fixed frame, its fixed frame top is the intrinsic support of pivot then, and this carriage support is pivoted for the driven pulley of corresponding driving wheel, and driving wheel and driven pulley periphery must be arranged with the abrasive band; Wherein: driven pulley two ora terminalis are provided with the block piece of one interlock, the abrasive band end face that delays in order to synchronous rotation is deviate from driven pulley, between support and support, be provided with the manual adjustment structure that adjustment seat and connecting piece are formed then, it is also adjusted bolt with one and wears and pull screw lock therebetween, so that adjust bolt by manually rotating, can be easy and adjust the driven pulley angle that deflects fast, in order to control position, abrasive band at the driven pulley middle position, in order to do the service life of promoting the abrasive band.

Description

Structure for adjusting abrasive belt trajectory

Technical field

The invention relates to a kind of structure for adjusting abrasive belt trajectory, specially refer to a kind of technology of controlling abrasive band stable running between two rollers at this.

Background technology

Sander is the facility that surface of the work ground to form shiny surface, its structure mainly is to be interval with axis two rollers parallel to each other on a board, and be arranged with the abrasive band in this two rollers periphery, cooperate a motor drive roller wherein, this two roller can be rotated in the lump, workpiece need only be suppressed on the belt-sanding surface, can be by high-speed friction with the surface of the work sanding.Because the abrasive band needs draw two rollers of intermediary, the central axis of its two roller is also non-complete precision parallel in the running, so abrasive band situation that as easy as rolling off a log generation is offset to the left or to the right in the process of running, cause this outer face, abrasive band can collide and rub fixed frame between two rollers, make the abrasive band fiber have life-span impairment or danger situation lax or that lift off to take place, then just the someone develop TaiWan, China patent announcement M280262 structure come in response to.

Please cooperate Fig. 1 to see it, it mainly makes driven pulley 91 two ends pivots be fixed in 92 of the disk bodies of two swing components, and make driven pulley 91 and amphidisc 92 by being loaded in the support 93, these support 93 base plates are provided with two openings 930, disk body 92 bottoms then are provided with driving lever 94, this driving lever 94 extends to support 93 bottom sides from support 93 set openings 930, the touch-control pneumatic control valve 96 in order to mat moving part 95, make the two swing components 92 axial dipole field predetermined angular of below driving wheel relatively, when touching swing component 92 in order on driven pulley 91, to move when this abrasive band, can change these driven pulley 91 relative drive sprocket axles to deviation angle, and then end is mobile in addition towards driven pulley 91 naturally to make this abrasive band, makes this abrasive band move back and forth the effect of adjustment on driven pulley 91 in order to do obtaining.

Make a general survey of the preceding case of M280262 number up-to-date patent of this bulletin, it has following three shortcomings at least:

One, its must by the abrasive band end face touch swing component 92 reach automatic adjustment driven pulley 91 relative drive sprocket axles to deviation angle, and this swing component 92 is also non-to be rotated in the lump together with driven pulley 91, and have differential to produce, so still have the life-span impairment situation of commonly using worn sand band edge face take place,

Two, the solid moving part 95 of the driving lever 94 of these suspentions and pivot, it is structural to be not enough to bear for a long time the related stress of sander when the sanding operation fully, causes the problem of the loose easily and precision forfeiture of structure.The more important thing is that it must be controlled and usefulness by other electrical equipment control and air pressure, and sets up air-pressure equipment, and is not suitable for the generally simple processing of the mobile DIY of palpus.

Three, its swing component 92 is only with moving part 95 unsettled location, but, these simple location structures are not enough to bear for a long time the related stress of sander when the sanding operation fully, so it has the loosening easily shortcoming of structure, and it is all suitable big to cause noise and vibrations, so impairment sanding flatness of meeting more or less or smoothness.

The inventor is studied improvement meticulously because existing structural design is perfect inadequately, engages in the experience of this industry through for many years, so invent out the present invention.

Summary of the invention

The purpose of this invention is to provide a kind of structure for adjusting abrasive belt trajectory of controlling abrasive band stable running between two rollers.

For achieving the above object, solution of the present invention is: a kind of structure for adjusting abrasive belt trajectory, the intrinsic driving wheel of its support pivot, but and be provided with the support of left and right sides swing in driving wheel top, this carriage support is pivoted for the driven pulley of corresponding driving wheel, and wherein: driven pulley two ora terminalis are provided with the block piece of one interlock; Be provided with manual adjustment structure between its support and support, should manually adjust structure mainly support be provided with and adjust seat, support is then relative is provided with connecting piece, it wears pull screw lock adjustment seat, connecting piece to adjust bolt, order adjustment bolt must support urgent fixing with connecting piece with adjusting seat, and after adjusting bolt, rotation can affect the connecting piece displacement, in order to adjust the driven pulley deflection angle.

Described support is installed with fixed frame, the intrinsic driving wheel of pivot between fixed frame and support, this fixed frame top then is provided with support, and the support bottom is with the intrinsic montant of pivot seat pivot, pivot seat and montant are arranged with elastic parts outward, and fixed frame is provided with the guide bracket that runs through for montant, and makes that elastic parts one end is connected to the support bottom surface, end is connected on the guide bracket in addition, support is suspended to the fixed frame top with what default elastic force was provided; Manually adjust structure and be provided with in the fixed frame group and adjust seat, support is then relative is provided with connecting piece, and it passes spring to adjust bolt, adjust seat and affect connecting piece, mat spring will adjust bolt elasticity to be positioned to adjust.

Be provided with intermediary's guide block between described adjustment seat, connecting piece; Adjust the two vertical grooves of adjusting that offer of seat symmetry, two adjust groove for intermediary's guide block cross-over connection, connecting piece, intermediary's guide block are provided with pivot hole, screw in relative one position of adjusting groove, order is adjusted bolt and is passed spring in regular turn, adjusts seat adjustment groove, screw, pivot hole, each is fixed in the connecting piece pivot with positioning screw cap and adjusts the bolt end in two sides, pivot hole then, its another adjustment groove then is provided with set bolt, this set bolt passes pad earlier and just runs through adjustment groove, intermediary's guide block, screws togather hold-doun nut by end intermediary's guide block is limited on the adjustment seat.

Described adjustment seat is provided with screw, and connecting piece is provided with the pivot hole in the position of relative screw, and order adjustment bolt passes spring in regular turn, adjusts seat screw, pivot hole, respectively with positioning screw cap the connecting piece pivot is fixed in two sides, pivot hole then and adjusts the bolt end.

Then to having a montant, this montant is hubbed at fixed frame in described support bottom, and support is provided with a locking unit, and this locking unit mainly has a tightening latch, and this tightening latch can be solid with the montant bolt.

Described support is installed with fixed frame, the intrinsic driving wheel of pivot between fixed frame and support, and this montant is slidedly arranged on fixed frame, and provides rack elasticity to be suspended to the fixed frame top; The intrinsic control bar of its fixed frame pivot, this control bar, montant are provided with fluted disc, the tooth pipe of the transmission that is meshing with each other in relative position, make this control bar can drive montant elasticity of compression assembly, make driven pulley dwindle spacing with driving wheel, after discharging the control bar, the power that its elastic parts just can provide a driven pulley to make progress the involution location.

Described fixed frame is provided with guide bracket, and this guide bracket has the rail hole of running through for montant; Guide bracket is provided with the locking unit, this locking unit has mainly provided keyhole at guide bracket, this keyhole system is tangential on rail hole lateral margin, this tightening latch end is provided with the screw thread than path, make it to be formed with shoulder in the screw thread junction, and this keyhole is provided with first clamp holder in montant one side, be provided with second clamp holder in other side of montant then, the position of the relative montant of two clamp holders is provided with the sandwich serface of symmetry with it, then the tightening latch screw thread is penetrated first clamp holder and be screwed into, make the tightening latch shoulder just be connected to the first clamp holder end face in second clamp holder.

Described two block pieces then are provided with cancave cambered surface at end face in opposite directions, and cancave cambered surface the inner and driven pulley are trimmed.

After adopting such scheme, the present invention even if this block piece is touched down at the abrasive band end face, also can not produce differential by the characteristic of this block piece and the rotation of driven pulley one between the two, and then overcome the situation of abrasive band end wear fully, really can promote the service life and the security in abrasive band greatly; And by cancave cambered surface low impose the hindrance function that moves outside the abrasive band, carry out the abrasive band position regulation when providing the suitable time to give the user.

Description of drawings

Fig. 1 system commonly uses and announces M280262 number structural representation;

Fig. 2 is a combination schematic appearance of the present invention;

Fig. 3 is the STRUCTURE DECOMPOSITION schematic diagram of vertical table of the present invention;

Fig. 4 is the generalized section of driven pulley of the present invention;

Fig. 5 is the generalized section of support of the present invention;

Fig. 6 is the front elevational schematic of the present invention in reset condition;

Fig. 7 is the action schematic diagram that the present invention adjusts driven pulley and driving wheel spacing;

Fig. 8 is the local enlarged diagram of driven pulley of the present invention;

Fig. 9 is the decomposing schematic representation of the manual adjustment unit of the present invention;

Figure 10 is the combination schematic appearance of the manual adjustment unit of the present invention;

Figure 11 is the combination generalized section of the manual adjustment unit of the present invention;

Figure 12 is the combination generalized section of the manual adjustment unit of the present invention;

Figure 13 is another embodiment schematic diagram of the manual adjustment unit of the present invention;

Figure 14 is the present invention's generalized section of unit when clamping that lock;

Figure 15 is the present invention's generalized section of unit when lax that lock.

The primary clustering symbol description

10 horizontal operation platforms, 11 abrasive bands

20 columns, 21 supports, 22 motors

30 vertical workbench 31 fixed frames 32 driving wheels 33 supports

330 pivot seats, 331 bearings, 332 montants, 333 tooth pipes

34 driven pulleys, 340 axles, 35 elastic parts, 36 guide brackets

37 abrasive bands, 360 rail holes, 38 control bars, 380 fluted discs

41 block pieces, 410 through holes, 411 cancave cambered surfaces

50 manual adjustment units 51 are adjusted seat 510 and are adjusted groove one 511 adjustment grooves two

512 screws, 52 connecting pieces, 520 pivot holes, 521 positioning screw caps

53 intermediary's guide blocks, 530 screws 54 are adjusted bolt 55 springs

56 set bolts, 560 pads, 561 hold-doun nuts

61 keyholes, 62 tightening latches, 620 screw threads, 621 shoulders

63 first clamp holders, 630 sandwich serfaces, one 64 second clamp holder, 640 sandwich serfaces two

91 driven pulleys, 92 disk bodies, 93 supports, 930 openings

931 axis, 94 driving levers, 95 moving parts, 96 pneumatic control valves

The specific embodiment

For making your juror can further understand structure of the present invention, feature and other purpose, the attached now graphic detailed description with preferred embodiment is as the back:

Please referring to Fig. 2, the present invention is arranged with abrasive band 11 in bottom level intrinsic at least two rollers of pivot at interval in these roller peripheries, under rotating at arbitrary roller, abrasive band 11 is rotated in the lump, make abrasive band 11 formed horizontal operation platforms 10, the workpiece bottom sanding can be provided;

Shown in Fig. 2,3, the horizontal operation platform side is perpendicular to be provided with a column 20, and this column 20 is slidingly equipped with a support 21 longitudinally with the cooperation of dovetail groove and dovetail block, and this support 21 is located at the screw rod control of column 20 by spiral shell, and can oscilaltion locate, support 21 back sides then are equipped with motor 22;

Support 21 fronts then are provided with vertical workbench 30, vertical workbench 30 is provided with a fixed frame 31 at support 21 locks, the intrinsic driving wheel 32 of 21 pivots of fixed frame 31 bottoms and support, driving wheel 32 is subjected to motor 22 interlocks and can turns round, these fixed frame 31 tops then are provided with an isometric and slightly wide support 33, this support 33 is for axle 340 location of corresponding driving wheel 32, as shown in Figure 4, its axle 340 runs through a hollow driven pulley 34, this driven pulley 34 can be hubbed on the axle 340 with bearing, as shown in Figure 5, support 33 bottom central authorities then organize downwards and are provided with pivot seat 330, in this pivot seat 330 between the upper and lower every be provided with two bearings 331, in order to the montant 332 that is pivoted in wherein, please cooperate Fig. 6,7 sights, pivot seat 330 and the montant 332 outer elastic parts 35 that are arranged with, fixed frame 31 then is provided with guide bracket 36, this guide bracket 36 vertically is provided with the rail hole of running through for montant 332 360, and make elastic parts 35 1 ends be connected to support 33 bottom surfaces, end is connected on the guide bracket 36 in addition, support 33 is suspended to fixed frame 31 tops with what default elastic force was provided, in order to do in driving wheel 32, driven pulley 34 peripheries make this abrasive band 37 that the workpiece sanding can be provided around being covered with abrasive band 37;

Abrasive band 37 can be taken off replacing easy and fast for convenience, the intrinsic control bar 38 of its fixed frame 31 pivots, this control bar 38, montant 332 are provided with fluted disc 380, the tooth pipe 333 of the transmission that can be meshing with each other in relative position, make this control bar 38 can drive montant 331 elasticity of compression assemblies 35, make driven pulley 34 dwindle spacing with driving wheel 32, to change abrasive band 37 easily, after discharging control bar 38, its elastic parts 35 just can provide the upwards power of involution location of a driven pulley 34, so that tighten in the abrasive band 37 that will newly change, in order to continuing the sanding operation.

The present invention mainly has following three architectural features:

(1), please cooperate Fig. 4-Fig. 8 to see it, its driven pulley 34 is organized respectively in the two ends edge and is provided with the bigger block piece of diameter 41, this two block piece 41 has through hole 410, these through hole 410 direct urgent shoulders that are positioned 34 liang of ora terminalis of driven pulley, make this block piece 41 meetings and rotation of driven pulley 34 one, driven pulley 34 then is assembled with clasp 42 in block piece 41 outer ends in addition, can at will not deviate from driven pulley 34 when rotated to guarantee block piece 41; Two block pieces 41 then are provided with cancave cambered surface 411 at end face in opposite directions, and cancave cambered surface 411 the inners and driven pulley 34 outer ends are trimmed.

Characteristic by this block piece 41 and the rotation of driven pulley 34 one, even if 37 end faces touch down in the abrasive band to make this block piece 41, also can not produce differential, and then overcome the situation of abrasive band 37 end wears fully, really can promote the service life and the security in abrasive band 37 greatly between the two; And by cancave cambered surface 411 low impose the outer hindrance functions that move in abrasive band 37, carry out abrasive band 37 position regulations when providing the suitable time to give the user.

(2), please cooperate Fig. 9-Figure 12, the present invention is provided with a manual adjustment unit 50 at support 22 and support 33 then, this manual adjustment unit 50 is locked respectively to be provided with at support 22, support 33 relative positions and is adjusted seat 51, connecting piece 52, adjusts

seat

51,52 of connecting pieces and is provided with intermediary's guide block 53; Wherein:

Adjust the vertical adjustment groove 1 of offering of seat 51 symmetries and adjust groove 2 511, adjusting groove 1 is for guide block 53 cross-over connections of ㄇ shape intermediary with adjusting groove 2 511, connecting piece 52, intermediary's guide block 53 is provided with the pivot hole 520 of oval shape in the position of adjusting groove 1 relatively, screw 530, and order adjustment bolt 54 passes spring 55 in regular turn, adjust seat 51 and adjust groove 1, screw 530, pivot hole 520, each is fixed in connecting piece 52 pivots with two positioning screw caps 521 and adjusts bolt 54 ends in screw 520 two sides then, and making spring 55 can flexiblely will adjust bolt 54 is positioned to adjust on the seat 51, must support urgent fixing with connecting piece 52 with adjusting seat 51, in addition, another is adjusted one 510 of grooves and is provided with a set bolt 56, this set bolt 56 passes pad 560 earlier and just runs through adjustment groove 1, intermediary's guide block 53, by lock knot hold-doun nut 561 intermediary's guide block 53 is limited on the adjustment seat 51, in order to do making intermediary's guide block 53 can not move partially with adjusting bolt 54 rotations, but when operation driven pulley 34 dwindles spacing with driving wheel 32, wherein mediate piece 53, adjusting bolt 54 can adjust groove 1 and adjust length travel in the groove 2 511, in addition, it is also quite simple and easy that it adjusts bolt 54 displacement connecting pieces 52, need only can make that support 33 is that the beat of fulcrum goes out required angle with pivot seat 330 by this adjustment bolt 54 of rotation, shown in Figure 12 as, when desire adjustment abrasive band 37 is moved to driven pulley 34 middle positions, need only be by the dextrorotation of adjusting bolt 54 or left-handed, can operate connecting piece 52 and drive support 33 is the beat of fulcrum with pivot seat 330, abrasive band 37 is moved for it in the lump, in order to do making this abrasive band 37 just be positioned at driven shaft 34 central parts, very meet simple and easy and adjustment fast to central part, and electrical equipment control and air pressure control in addition, more needn't cooperate air-pressure equipment to use, so can be suitable for the generally popular simple processing of the mobile DIY of palpus, and whole acquisition cost more meets economic benefit far beyond commonly using.

See also Figure 13, it is manual adjustment unit 50 another embodiment of the present invention, this embodiment simplifies intermediary's guide block 53 and is provided with, and directly screw 512 is set in adjusting seat 51, connecting piece 52 is provided with the pivot hole 520 of oval shape in the position of relative screw 512, and order adjustment bolt 54 passes spring 55 in regular turn, adjust seat 51 screws 512, pivot hole 520, each is fixed in connecting piece 52 pivots with two positioning screw caps 521 and adjusts bolt 54 ends in screw 520 two sides then, mat spring 55 will be adjusted bolt 54 elasticity and be positioned to adjust on the seat 51, must support urgent fixing with connecting piece 52 with adjusting seat 51 in order to do order adjustment bolt 54, it is quite simple and easy to adjust bolt 54 displacement connecting pieces 52, and it need only rotate this adjustment bolt 54 and get final product.

(3), please cooperate Fig. 3,14,15 sights, the present invention is provided with a locking unit at fixed frame 31 in guide bracket 36 in addition, it has provided a horizontally disposed keyhole 61 at guide bracket 36 earlier, this keyhole 61 is to be tangential on rail hole 360 lateral margins, so that tightening latch 62 movable penetrating in the keyhole 61 freely, these tightening latch 62 ends are provided with the screw thread 620 than path, make it to be formed with shoulder 621 in screw thread 620 junctions, and this keyhole 61 is provided with first clamp holder 63 in montant 332 1 sides, be provided with second clamp holder 64 in montant 332 other sides then, two clamp holders 63, the position of 64 relative montants 332 is provided with the arc sandwich serface 1 of symmetry with it, sandwich serface 2 640, then tightening latch 62 screw threads 620 are worn pivot first clamp holder, 63 backs and be screwed into second clamp holder 64, make tightening latch 62 shoulders 621 just be connected to first clamp holder, 63 end faces, so that rotation by tightening latch 62, control two clamp holders 63,64 drive sandwich serface 1 simultaneously, sandwich serface 2 640 comes clamping montant 332, perhaps makes two clamp holders 63,64 drive sandwich serface 1 simultaneously, sandwich serface 2 640 leaves montant 332.

It is when carrying out sanding, system makes the locking unit that montant 332 is fixing earlier, when treating to change abrasive band 37, need only operate tightening latch 62 and loosen two clamp holders 6364, in order to do discharging montant 332, can depress control bar 38 this moment, control bar 38 is moved down with fluted disc 380 interlock montants 332 tooth pipes 333, make support 33 elasticity of compression assemblies 35 and driven pulley 34 is dwindled and driving wheel 32 between distance, changing abrasive band 37 easily, after discharging control bar 38, its elastic parts 35 just can provide the upwards power of involution location of a driven pulley 34, so that tighten in the abrasive band 37 that will newly change, afterwards, the tightening latch 62 of the unit that just will lock screws, promptly can make two

clamp holders

63,64 with montant 332 clampings, so that during the sanding operation, decapacitation provides outside the function of a fixedly driven shaft 34, and overcomes greatly and commonly use vibrations, noise or the not good problem of sanding flatness.

In sum, the present invention architectural feature among existing this class formation, can be described as not seen before, owing to have concentrated design, so above-mentioned advantage is arranged, and be a quite outstanding and excellent design, it there is no similar invention or disclosed delivering in like product, so meet the application important document of patent of invention, be to file an application in the whence in accordance with the law.Only the above person only is one of the present invention preferred embodiment, when can not with qualification scope of the invention process, promptly the equalization of being done according to the present patent application claim generally changes and modifies, and all belongs to scope of the present invention.For example, be provided with corresponding adjustment seat 51, connecting piece 52 in fixed frame 31 and support 33 appropriate locations, and pass spring 55 to adjust bolt 54, adjust seat 51 and affect connecting piece 52, reach the function that to adjust driven pulley 34 deflection angles in order to be equal to.

Claims

1, a kind of structure for adjusting abrasive belt trajectory, the intrinsic driving wheel of its support pivot, but and be provided with the support of left and right sides swing in driving wheel top, this carriage support is pivoted for the driven pulley of corresponding driving wheel, it is characterized in that: driven pulley two ora terminalis are provided with the block piece of one interlock; Be provided with manual adjustment structure between its support and support, should manually adjust the structure support and be provided with the adjustment seat, support is then relative is provided with connecting piece, it wears pull screw lock adjustment seat, connecting piece to adjust bolt, order adjustment bolt must support urgent fixing with connecting piece with adjusting seat, and after adjusting bolt, rotation can affect the connecting piece displacement, in order to adjust the driven pulley deflection angle.

2, structure for adjusting abrasive belt trajectory as claimed in claim 1, it is characterized in that: support is installed with fixed frame, the intrinsic driving wheel of pivot between fixed frame and support, this fixed frame top then is provided with support, and the support bottom is with the intrinsic montant of pivot seat pivot, and pivot seat and montant are arranged with elastic parts outward, and fixed frame is provided with the guide bracket that runs through for montant, and make that elastic parts one end is connected to the support bottom surface, in addition end is connected on the guide bracket, support is suspended to the fixed frame top with what default elastic force was provided; Manually adjust structure and be provided with in fixed frame and adjust seat, support is then relative is provided with connecting piece, passes spring to adjust bolt, adjusts seat and affect connecting piece, mat spring will adjust bolt elasticity to be positioned to adjust.

3, structure for adjusting abrasive belt trajectory as claimed in claim 1 or 2 is characterized in that: adjust between seat, connecting piece and be provided with intermediary's guide block; Adjust the two vertical grooves of adjusting that offer of seat symmetry, two adjust groove for intermediary's guide block cross-over connection, connecting piece, intermediary's guide block are provided with pivot hole, screw in relative one position of adjusting groove, order is adjusted bolt and is passed spring in regular turn, adjusts seat adjustment groove, screw, pivot hole, each is fixed in the connecting piece pivot with positioning screw cap and adjusts the bolt end in two sides, pivot hole then, its another adjustment groove then is provided with set bolt, this set bolt passes pad earlier and just runs through adjustment groove, intermediary's guide block, screws togather hold-doun nut by end intermediary's guide block is limited on the adjustment seat.

4, structure for adjusting abrasive belt trajectory as claimed in claim 1 or 2, it is characterized in that: adjust seat screw is set, connecting piece is provided with the pivot hole in the position of relative screw, and order adjustment bolt passes spring in regular turn, adjusts a seat screw, pivot hole, and each is fixed in the connecting piece pivot with positioning screw cap and adjusts the bolt end in two sides, pivot hole then.

5, structure for adjusting abrasive belt trajectory as claimed in claim 1 is characterized in that: then to having a montant, this montant is hubbed at fixed frame in the support bottom, and support is provided with a locking unit, and this locking unit has a tightening latch, and this tightening latch can be solid with the montant bolt.

6, structure for adjusting abrasive belt trajectory as claimed in claim 5, it is characterized in that: support is installed with fixed frame, the intrinsic driving wheel of pivot between fixed frame and support, this montant is slidedly arranged on fixed frame, and provides rack elasticity to be suspended to the fixed frame top; The intrinsic control bar of its fixed frame pivot, this control bar, montant are provided with fluted disc, the tooth pipe of the transmission that is meshing with each other in relative position, make this control bar can drive montant elasticity of compression assembly, make driven pulley dwindle spacing with driving wheel, after discharging the control bar, the power that its elastic parts just can provide a driven pulley to make progress the involution location.

7, structure for adjusting abrasive belt trajectory as claimed in claim 6, it is characterized in that: fixed frame is provided with guide bracket, and this guide bracket has the rail hole of running through for montant; Guide bracket is provided with the locking unit, this locking unit has mainly provided keyhole at guide bracket, this keyhole system is tangential on rail hole lateral margin, this tightening latch end is provided with the screw thread than path, make it to be formed with shoulder in the screw thread junction, and this keyhole is provided with first fastening block in montant one side, be provided with second clamp holder in other side of montant then, the position of the relative montant of two clamp holders is provided with the sandwich serface of symmetry with it, then the tightening latch screw thread is penetrated first clamp holder and be screwed into, make the tightening latch shoulder just be connected to the first clamp holder end face in second clamp holder.

8, structure for adjusting abrasive belt trajectory as claimed in claim 1 is characterized in that: two block pieces then are provided with cancave cambered surface at end face in opposite directions, and cancave cambered surface the inner and driven pulley are trimmed.