CN201253799Y - Abrasive belt type grinding tool - Google Patents

Abstract

A sand belt-type polishing tool comprises a main machine (1) which outputs the rotary reciprocating torque, and working heads (2,5,6,7,8) arranged on the main machine (1); the working heads (2,5,6,7,8) comprise connecting parts (21,51,61,71,81) and at least two support ends (231,241,641,642,741,742,841,842); a closed annular sand belt (3) is supported and oriented on the support ends (231,241,641,642,741,742,841,842); and the annular sand belt (3) and the working heads (2,5,6,7,8) are driven by the main machine (1) to make rotary reciprocating movements. The sand belt-type polishing tool can polish the workpieces with curved surfaces, especially the surfaces of tubular profiles.

Description

Abrasive belt type grinding tool

Technical field

The utility model relates to a kind of milling tool, and particularly a kind of abrasive belt type grinding tool that adopts the abrasive belt working head grinds the surface of the workpiece of tubulose section bar in order to realization.

Background technology

Belt sander is the grinding used always with one of instrument, mainly is to grind at the surface of workpiece (as timber etc.), removes burr and makes it smooth, and then can normally use.But, surface of the work is ground the belt sander or the sander that are adopted have bigger frosted plane usually, and on this frosted plane, paste larger-size sand paper, thereby cause the volume of this belt sander or sander bigger, only can be fit to the surface grinding of large-area tabular section bar, and less for area, and for the section bar with curved surface, as common tubulose section bar, such belt sander or sander then can't use.

, address that need, the abrasive belt type grinding tool that industry has designed miniaturization solves the grinding problem of curved surface for this reason.The European patent notification number is to disclose in the specification of EP1647362 a kind of abrasive belt type grinding tool is arranged.This abrasive belt type grinding tool comprises main frame and the working head that is connected on this main frame.Wherein, be provided with output shaft in this main frame and be used to provide rotation torque, this working head is roughly V-shaped, comprises the connecting portion that is connected with main frame and from two support ends that connecting portion extends, is used for supporting and the guiding abrasive band.This connecting portion is fixedlyed connected with the housing of main frame, and the output shaft of main frame stretches in this connecting portion, and connects to drive driving rolls is arranged, and two support ends of V-type working head are respectively arranged with return idler.Like this, these three rollers constitute a triangle, and these three rollers are provided with the abrasive band.By the rotation torque that the output shaft of main frame provides, driving rolls produces rotation, and drives return idler by the abrasive band and produce rotation thereupon.The abrasive band just can be rotated under the support of these three rollers and guiding, and the abrasive band of rotation, especially the abrasive band part between two support ends promptly can the grinding work-piece surfaces.

The United States Patent (USP) notification number is to disclose in the specification of US6736711 another kind of abrasive belt type grinding tool is arranged.This abrasive belt type grinding tool comprises main frame and is connected driving wheel on the output shaft of main frame, and this driving wheel is subjected to host driven and does rotation around the axle center of driving wheel and move back and forth.Dismountablely on this driving wheel be connected with nonocclusive abrasive band, two points that are connected with the abrasive band become the support end that supports the abrasive band.Simultaneously, then be set on the curved surface of the surface of the work that needs grinding in the abrasive band part between two support ends.Like this, when driving wheel was done rotation and moved back and forth, the abrasive band can be ground curve surface of workpiece under driving wheel and curve surface of workpiece together support guiding and reciprocal effect.

But, for first kind of abrasive belt type grinding tool, because need being activated the driving of roller, the abrasive band could produce rotation, therefore, driving rolls that is provided with on working head and return idler cause the complex structure of this working head, and further make the volume of whole working head bigger, (as the corner etc.) uses inconvenience in the narrow and small place of some workpiece environment.And for second kind of abrasive belt type grinding tool, owing to adopted nonocclusive abrasive band, in real work, the abrasive band of playing abrasive action only is confined to the mid portion in whole abrasive band, thereby the utilization rate in abrasive band is reduced.And the same because mid portion in abrasive band is always as grind section, and after the centre part was polished, whole abrasive band also can't continue to use, thereby causes the service life in this abrasive band limited.

For this reason, technique scheme is real is further improved.

The utility model content

The purpose of this utility model is to provide a kind of simple in structure and abrasive belt type grinding tool that volume is little, can realize the surface of the work with curved surface is ground.

Another purpose of the present utility model is to provide a kind of abrasive belt type grinding tool that can improve abrasive band utilization rate and service life.

For achieving the above object, the utility model discloses a kind of abrasive belt type grinding tool, the main frame and the working head that is removably mounted on the main frame that comprise the reciprocal moment of torsion of output rotation, this working head comprises connecting portion and at least two support ends, described support end upper support and guiding have the ring-type abrasive band of sealing, and described ring-type abrasive band and working head together are subjected to host driven and do the rotation reciprocating motion.

As the improvement to such scheme, in this abrasive belt type grinding tool, two support ends and connecting portion are V-shape and arrange; This connecting portion is rounded, and its center is provided with the connecting hole that connects main frame; On this connecting portion and perpendicular to the plane at this connecting portion place, extend and be provided with fixed arm and lever arm, and two support ends lay respectively at the free end of this fixed arm and lever arm and perpendicular to this fixed arm and lever arm; Perhaps, extend on this connecting portion and perpendicular to the plane at this connecting portion place certainly and be provided with two lever arms, and two support ends lay respectively at the free end of two lever arms and perpendicular to these two lever arms; This lever arm comprises connecting plate and portable plate, wherein, connecting plate and connecting portion are one-body molded, second support end is positioned at the free end of portable plate, this connecting plate and portable plate connect as one by connecting pin, and under the effect of torsion spring, portable plate can overcome the active force of torsion spring and rotate around connecting pin with respect to connecting plate; Also be arranged with cushion on this first support end and second support end, this cushion has at least one section to be arcwall face; The length H of this cushion equates with the length h of first support end and second support end.

As another improvement to such scheme, in this abrasive belt type grinding tool, on this working head, be positioned at a side of connecting portion and extend side plate is arranged perpendicular to plane, connecting portion place, be provided with gripper shoe on side plate and perpendicular to side plate, described first support end and second gripper shoe lay respectively on this gripper shoe; This gripper shoe also comprises the pars intermedia that connects first, second support end, and this first, second support end and pars intermedia are integral structure; The width D of this gripper shoe is suitable with the width d in the ring-type abrasive band of being adopted; With respect to the outside of first, second support end, also be connected with cushion; Also be provided with strainer on this working head, it comprises casting die, and an end of this casting die is columniform depression bar, and the other end is then pivotable to be connected on the side plate, and on the pars intermedia of gripper shoe, corresponding depression bar is formed with groove.

As another improvement to such scheme, in this abrasive belt type grinding tool, this working head comprises the gripper shoe in support guide ring-type abrasive band, and this gripper shoe and connecting portion integrate, wherein, this gripper shoe is inverted U type, and this connecting portion is in the mid portion of the U of this gripper shoe type, and first support end and second support end lay respectively at the two ends of the U type of gripper shoe; Also be provided with strainer on this working head, it comprises casting die, and this casting die comprises two depression bars, and corresponding depression bar is formed with groove on gripper shoe; Be provided with holddown groove on gripper shoe, the free end of depression bar can be inserted in the holddown groove.

As another improvement to such scheme, in this abrasive belt type grinding tool, this working head comprises the gripper shoe in support guide ring-type abrasive band, and connecting portion and gripper shoe integrate, this gripper shoe is triangular in shape, connecting portion then is positioned at this leg-of-mutton center, and described first support end and second support end lay respectively on this gripper shoe; This working head also comprises the 3rd support end; Also be provided with tensioning apparatus on this working head, comprise casting die, this casting die comprises two depression bars, and corresponding depression bar is formed with groove on gripper shoe; This groove is respectively formed between first support end and the 3rd support end and between second support end and the 3rd support end; Also be connected with cushion on this first support end and second support end, this cushion is curved.

The helpfulness effect that adopts this abrasive belt type grinding tool is can be to having the workpiece of curved surface, and especially grind on the surface of tubulose section bar.And, simple in structure and volume is small and exquisite because the working head that adopts is not provided with elements such as driving rolls, can use in the limited place of some space environments.

Another helpfulness effect that adopts this abrasive belt type grinding tool is after case type ring-type abrasive band is installed on the working head, its part between support end is a grind section, promptly along with the difference of the position of the installation in case type ring-type abrasive band, its arbitrary part all can be between support end and become grind section, has so just improved the utilization rate in ring-type abrasive band effectively and has prolonged service life in ring-type abrasive band.

Description of drawings

Fig. 1 is the partial perspective view of abrasive belt type grinding tool in the preferred embodiment of the present utility model;

Fig. 2 is the schematic perspective view of the working head of this abrasive belt type grinding tool;

Fig. 3 a, 3b are respectively the user mode reference diagram of this abrasive belt type grinding tool;

Fig. 4 is the schematic perspective view of working head among second embodiment of this abrasive belt type grinding tool;

Fig. 5 is the user mode reference diagram of second embodiment of this abrasive belt type grinding tool;

Fig. 6 is the schematic perspective view of working head among the 3rd embodiment of this abrasive belt type grinding tool;

Fig. 7 is the schematic perspective view of working head among the 4th embodiment of this abrasive belt type grinding tool;

Fig. 8 is the schematic perspective view of working head among the 5th embodiment of this abrasive belt type grinding tool;

Wherein, the related elements reference numeral is listed as follows:

1-main frame, 2-working head, 3-ring-type abrasive band

4-workpiece, 21-connecting portion, 22-connecting hole

23-fixed arm, 231-the first support end, 24-lever arm

241-the second support end, 242-connecting plate, 243-portable plate

244-connecting pin, 245-torsion spring, 25-cushion

251-arcwall face, 5-working head, 51-connecting portion

54-lever arm, 6-working head, 61-connecting portion

62-connecting hole, 63-side plate, 64-gripper shoe

641-the first support end, 642-the second support end, 643-pars intermedia

644-groove, 65-cushion, 66-casting die

661-depression bar, 7-working head, 71-connecting portion

74-gripper shoe, 741-the first support end, 742-the second support end

744-groove, 745-holddown groove, 77-casting die

771-depression bar, 8-working head, 81-connecting portion

84-gripper shoe, 841-the first support end, 842-the second support end

843-the three support end 844-groove, 85-cushion

88-casting die, 881-depression bar

The specific embodiment

Below in conjunction with drawings and the specific embodiments the utility model is described in further detail.

See also Fig. 1, disclose a kind of abrasive belt type grinding tool in the preferred embodiment of the present utility model, be applicable to that the workpiece 4 (see Fig. 3, relate generally to the tubulose section bar) with curved surface is carried out surface finish to be handled.This abrasive belt type grinding tool comprises main frame 1 and the working head 2 that is installed on the main frame 1.The main frame 1 here is a kind of power tool that can export the reciprocal moment of torsion of rotation, this power tool is in the industry cycle used widely, Multi Role Aircraft as companies such as FEIN, BOSCH product, its structure and principle are to drive the eccentric wheel rotation that is connected on the motor by the motor that is positioned at main frame 1, the shift fork that is connected with this eccentric wheel is subjected to the drive of eccentric eccentric rotation and moves back and forth around the pivot generation rotation perpendicular to shift fork, perhaps is referred to as to rotate reciprocating vibration.Through the moment of torsion transmission of said elements, the output shaft of last main frame 1 can produce rotation and move back and forth.After on the output shaft of this main frame 1 working head 2 being installed removably, this working head 2 will produce same rotation and move back and forth, and the track of its motion is shown in the double-head arrow among the figure.At this moment, if be equiped with the ring-type abrasive band 3 of sealing on this working head 2, then this ring-type abrasive band 3 also will be rotated reciprocating motion thereupon, thereby can the curved surface of workpiece 4 be ground.

Need to prove that different with traditional belt sander is that ring-type abrasive band 3 is not to be that the circulation rotation is used, but fixed with respect to working head 2, can remove the driving to ring-type abrasive band 3 like this from, thereby the structure of working head 2 is simplified.And along with the difference of the installation site of ring-type abrasive band 3 on working head 2, the arbitrary position on the ring-type abrasive band 3 all can become means of abrasion, thereby has improved the utilization rate in ring-type abrasive band 3 and effectively prolonged service life in ring-type abrasive band 3.

See also Fig. 2, this working head 2 is the support rack type structure, comprises connecting portion 21 and two arm ends that extend from connecting portion 21, and this connecting portion 21 and two arm ends are V-shape and arrange.The connecting portion 21 here is roughly rounded, and its center is provided with connecting hole 22, is used for being connected with the output shaft of main frame 1.One of them the arm end that extends from connecting portion 21 is a fixed arm 23, and this fixed arm 23 is vertical with respect to connecting portion 21 planes of living in, and its free end is formed with bending.Relatively, another arm end that extends from connecting portion 21 is a lever arm 24, and its free end also is formed with bending.In these two bending places, respectively along extending separately perpendicular to fixed arm 23 and lever arm 24 and forming first support end 231 and second support end 241 that is used to install ring-type abrasive band 3.On this first support end 231 and second support end 241, also be connected with cushion 25, and, one section arcwall face 251 be provided with on this cushion 25 at least.Like this, ring-type abrasive band 3 just can be centered around on the arcwall face 251 of cushion 25 and carry out support guide by first support end 231 and second support end 241.Need to prove, for the cushion 25 and first support end 231 be connected with second support end 241 firmly, the length H of this cushion 25 equates with the length h of first support end 231 and second support end 241.

See also Fig. 3 a, this lever arm 24 is for fixed arm 23, and himself can be movable, and purpose is the more convenient ring-type abrasive band 3 of installing efficiently or change, promptly this lever arm 24 constitutes a kind of strainer in fact, can carry out tensioning or relexation to ring-type abrasive band 3.This lever arm 24 comprises connecting plate 242, portable plate 243, and this connecting plate 242 and portable plate 243 all are perpendicular to plane, connecting portion 21 place.Wherein, this connecting plate 242 is one-body molded with connecting portion 21, and described second support end 241 then is positioned at the free end of this portable plate 243, and, pivoting by connecting pin 244 between this connecting plate 242 and the portable plate 243 is connected, thereby makes the portable plate 243 can be with respect to connecting plate 242 rotations.Also be provided with torsion spring 245 on this connecting pin 244, under the nature, this torsion spring 245 always makes portable plate 243 be on the maximum deflection angle with respect to connecting plate 242, and promptly the distance between first support end 231 and second support end 241 is maximum.Adopt in such a way, the operator can reduce the distance between first support end 231 and second support end 241 effectively by the rotation to portable plate 243, helps ring-type abrasive band 3 is set on first support end 231 and second support end 241.After 3 installings of ring-type abrasive band are good, the operator unclamps portable plate 243, then portable plate 243 turns round around connecting pin 244 under the effect of torsion spring 245, driving second support end 241 moves, thereby increased the distance between first support end 231 and second support end 241, and then made ring-type abrasive band 3 obtain tensioning.

See also Fig. 3 b, the milling tool that installs ring-type abrasive band 3 at first contacts the curved surface of ring-type abrasive band 3 with workpiece 4 when coming into operation, and 3 in ring-type abrasive band can be stressed and produce crooked.Be a kind of critical condition at this moment, does not also grind the curved surface of workpiece 4 in ring-type abrasive band 3.When the operator continues workpiece is applied active force, ring-type abrasive band 3 will begin the curved surface of workpiece 4 is ground, and this moment, ring-type abrasive band 3 degree of crook increased the weight of, and can make the portable plate 243 of lever arm 24 produce small rotation, shown in dotted line and solid line among Fig. 3 a.But this small rotation is not because by the pressure of the curved surfaces of workpiece 4, ring-type abrasive band 3 itself produces lax state, so it can not come off from first support end 231 and second support end 241.At this moment, the rotation of being undertaken by working head 2 moves back and forth, and ring-type abrasive band 3 will produce rotation equally and move back and forth, and the curved surface of workpiece 4 is ground.

See also Fig. 4, be another kind of embodiment disclosed in the utility model.The working head 5 among this embodiment and the difference of the working head 2 among the embodiment one are, two arm ends that extend from its connecting portion 51, all adopt the lever arm 54 as the lever arm in the working head 2 24, and do not adopt one of them arm end to be fixed arm structure with respect to connecting portion 51 one, two lever arm 54 common formation strainers.The benefit of doing like this is to avoid the fixed arm 23 in the working head 2 to produce the risk possibility of fracture too greatly because of rotating reciprocating active force effectively.

See also Fig. 5, this working head 5 when reality is used, except can using as working head 2, can also be at the less tubular-type workpiece 4 of some diameters, adopt with respect to an other side (inboard) of the grind section (outside) in ring-type abrasive band 3 and grind.This also is one of superior place that adopts in ring-type abrasive band 3, can effectively utilize the inside and outside both sides in ring-type abrasive band 3.Under this occupation mode, the operator is the direction pulling of handheld abrasive tool towards main frame 1, grind the curved surface of workpiece 4 inboard that utilizes ring-type abrasive band 3, and in embodiment one, the operator be handheld abrasive tool dorsad the direction of main frame 1 promote, grind the curved surface of workpiece 4 in the outside that utilizes ring-type abrasive band 3.No matter which kind of lapping mode the operator adopts, and the principle of doing in working head and ring-type abrasive band 3 is the same.

Please continue to consult Fig. 6, be the third embodiment disclosed in the utility model.Working head 6 among this embodiment provides a kind of grinding direction perpendicular with respect to the grinding direction of aforementioned working head, can realize horizontal tube surfaces is ground.This working head 6 comprises connecting portion 61 and extends from a side of connecting portion 61 and perpendicular to plane, connecting portion 61 place side plate 63, wherein the center of connecting portion 61 is provided with connecting hole 62, be used to connect main frame 1, and on side plate 63 perpendicular to side plate 63, promptly be parallel to connecting portion 61 and be provided with gripper shoe 64.The width D of this gripper shoe 64 is roughly suitable with the width d in the ring-type abrasive band 3 of being adopted, thereby can be used for support guide ring-type abrasive band 3.Need to prove, this gripper shoe 64 is an integral structure, comprise first support end 641, second support end 642 and the pars intermedia 643 that connects first, second support end 641,642, and, the outside with respect to first, second support end 641,642, also be connected with cushion 65, thereby ring-type abrasive band 3 can be centered around on the cushion 65 in first, second support end 641,642 outsides.

In order to make ring-type abrasive band 3 be tensioning state, also be provided with strainer on this working head 6, it comprises casting die 66, one end of this casting die 66 is columniform depression bar 661, the other end is then pivotable to be connected on the side plate 63, on the pars intermedia 643 of gripper shoe 64, corresponding depression bar 661 is formed with groove 644.When ring-type abrasive band 3 is coated on the gripper shoe 64, by depression bar 661, ring-type abrasive band 3 can be pressed to the groove 644 on the pars intermedia 643, until fully with 3 tensionings of ring-type abrasive band.And when needs were changed ring-type abrasive band 3, the operator only needed the depression bar 661 of casting die 66 is pulled out from groove 644, and relaxed state can be replied in ring-type abrasive band 3, can take off from gripper shoe 64.

Please continue to consult Fig. 7, be the 4th embodiment provided by the utility model.Working head 7 among this embodiment has adopted monolithic construction, and the gripper shoe 74 that is about to support guide ring-type abrasive band 3 integrates with the connecting portion 71 that is connected main frame 1.This gripper shoe 74 roughly is inverted U type, and this connecting portion 71 is positioned at the mid portion of the U type of this gripper shoe 74, and is positioned at the two ends of the U type of gripper shoe 74, is formed with first support end 741 and second support end 742 respectively.Equally, in order to make the ring-type abrasive band 3 that is installed on this working head 7 be tensioning state, also be provided with the casting die among the embodiment three 77 on this working head 7, different is, the casting die 77 here comprises two depression bars 771, and the free end of these two depression bars 771 can be inserted in the holddown groove 745 on the gripper shoe 74 to prevent the loosening suddenly of depression bar 771.Corresponding depression bar 771 is formed with groove 744 on gripper shoe 74.When ring-type abrasive band 3 is coated on the gripper shoe 74, by depression bar 771, groove 744 can be pressed in ring-type abrasive band 3, until fully with 3 tensionings of ring-type abrasive band.And when needs were changed ring-type abrasive band 3, the operator only needed the depression bar 771 of casting die 77 is pulled out from groove 744, and relaxed state can be replied in ring-type abrasive band 3, can take off from gripper shoe 74.

Please continue to consult Fig. 8, by the utility model is provided the 5th embodiment.The working head 8 same monolithic constructions that adopt among this embodiment, promptly connecting the connecting portion 81 of main frame 1 and the gripper shoe 84 in support guide ring-type abrasive band 3 integrates, be with the difference of embodiment four, the gripper shoe 84 here is roughly triangular in shape, and connecting portion 81 then is positioned at this leg-of-mutton center.This gripper shoe 84 comprises first support end 841 and second support end 842, and the 3rd support end 843, and, on this first support end 841 and second support end 842, also be connected with cushion 85.This cushion 85 is roughly curved, can be for ring-type abrasive band 3 around thereon.Equally, be tensioning state in order to make the ring-type abrasive band 3 that is installed on this working head 8, also be provided with the casting die among the embodiment three 88 on this working head 8, different is that the casting die 88 here comprises two depression bars 881.Corresponding depression bar 881 is formed with groove 844 on gripper shoe 84.This groove 844 is respectively formed between first support end 841 and the 3rd support end 843 and between second support end 842 and the 3rd support end 843.When ring-type abrasive band 3 is coated on the gripper shoe 84, by depression bar 881, groove 844 can be pressed in ring-type abrasive band 3, until fully with 3 tensionings of ring-type abrasive band.And when needs were changed ring-type abrasive band 3, the operator only needed the depression bar 881 of casting die 88 is pulled out from groove 844, and relaxed state can be replied in ring-type abrasive band 3, can take off from gripper shoe 84.

The utility model provides among five kinds of embodiment, the working head that is adopted includes at least the first support end and second support end, be used for ring-type abrasive band support guide, simultaneously, in order to guarantee the tensioning in ring-type abrasive band, also be provided with strainer on this working head, be beneficial to change in order to tensioning or lax ring-type abrasive band.Strainer wherein is not limited to disclosed structure in the utility model, and other strainers that can realize tensioning function equally are also within protection domain of the present utility model.

Claims (21)

1, a kind of abrasive belt type grinding tool, comprise the main frame (1) of the reciprocal moment of torsion of output rotation and be removably mounted on working head (2 on the main frame (1), 5,6,7,8), this working head (2,5,6,7,8) comprise connecting portion (21,51,61,71,81) and at least two support ends (231,241,641,642,741,742,841,842), it is characterized in that: described support end (231,241,641,642,741,742,841,842) upper support and guiding have the ring-type abrasive band (3) of sealing, described ring-type abrasive band (3) and working head (2,5,6,7,8) driven by main frame (1) and do rotation and move back and forth.

2, abrasive belt type grinding tool as claimed in claim 1 is characterized in that: these two support ends (231,241) are V-shape with connecting portion (21) and arrange.

3, abrasive belt type grinding tool as claimed in claim 2 is characterized in that: this connecting portion (21) is rounded, and its center is provided with the connecting hole (22) that connects main frame (1).

4, abrasive belt type grinding tool as claimed in claim 3, it is characterized in that: this connecting portion (21) is gone up and is extended perpendicular to the plane at this connecting portion (21) place and is provided with fixed arm (23) and lever arm (24) certainly, and two support ends (231,241) lay respectively at the free end of this fixed arm (23) and lever arm (24) and perpendicular to this fixed arm (23) and lever arm (24).

5, abrasive belt type grinding tool as claimed in claim 3, it is characterized in that: extend on this connecting portion and perpendicular to the plane at this connecting portion place certainly and be provided with two lever arms (54), and two support ends lay respectively at the free end of two lever arms (54) and perpendicular to these two lever arms (54).

6, as claim 4 or 5 described abrasive belt type grinding tools, it is characterized in that: this lever arm (24,54) comprises connecting plate (242) and portable plate (243), wherein, connecting plate (242) is one-body molded with connecting portion (21), second support end (241) is positioned at the free end of portable plate (243), this connecting plate (242) connects as one by connecting pin (244) with portable plate (243), and under the effect of torsion spring (245), portable plate (243) can overcome the active force of torsion spring (245) and rotate around connecting pin (244) with respect to connecting plate (242).

7, abrasive belt type grinding tool as claimed in claim 6 is characterized in that: also be arranged with cushion (25) on this first support end (231) and second support end (241), this cushion (25) has at least one section to be arcwall face (251).

8, abrasive belt type grinding tool as claimed in claim 7 is characterized in that: the length H of this cushion (25) equates with the length h of first support end (231) and second support end (241).

9, abrasive belt type grinding tool as claimed in claim 1, it is characterized in that: on this working head (6), be positioned at a side of connecting portion (61) and extend and side plate is arranged (63) perpendicular to connecting portion (61) plane, place, upward and perpendicular to side plate (63) be provided with gripper shoe (64) at side plate (63), described first support end (641) and second gripper shoe (642) lay respectively on this gripper shoe (64).

10, abrasive belt type grinding tool as claimed in claim 9, it is characterized in that: this gripper shoe (64) also comprises the pars intermedia (643) that connects first, second support end (641,642), and this first, second support end (641,642) and pars intermedia (643) are integral structure.

11, abrasive belt type grinding tool as claimed in claim 10 is characterized in that: the width D of this gripper shoe (64) is suitable with the width d in the ring-type abrasive band (3) of being adopted.

12, abrasive belt type grinding tool as claimed in claim 11 is characterized in that: with respect to the outside of first, second support end (641,642), also be connected with cushion (65).

13, abrasive belt type grinding tool as claimed in claim 12, it is characterized in that: this working head also is provided with strainer on (6), it comprises casting die (66), one end of this casting die (66) is columniform depression bar (661), the other end is then pivotable to be connected on the side plate (63), on the pars intermedia (643) of gripper shoe (64), corresponding depression bar (661) is formed with groove (644).

14, abrasive belt type grinding tool as claimed in claim 1, it is characterized in that: this working head (7) comprises the gripper shoe (74) in support guide ring-type abrasive band (3), and this gripper shoe (74) integrates with connecting portion (71), wherein, this gripper shoe (74) is inverted U type, this connecting portion (71) is positioned at the mid portion of the U type of this gripper shoe (74), and first support end (741) and second support end (742) lay respectively at the two ends of the U type of gripper shoe (74).

15, abrasive belt type grinding tool as claimed in claim 14, it is characterized in that: this working head also is provided with strainer on (7), and it comprises casting die (77), and this casting die (77) comprises two depression bars (771), corresponding depression bar (771) is formed with groove (744) on gripper shoe (74).

16, abrasive belt type grinding tool as claimed in claim 15 is characterized in that: be provided with holddown groove (745) on gripper shoe (74), the free end of depression bar (771) can be inserted in the holddown groove (745).

17, abrasive belt type grinding tool as claimed in claim 1, it is characterized in that: this working head (8) comprises the gripper shoe (84) in support guide ring-type abrasive band (3), and connecting portion (81) integrates with gripper shoe (84), this gripper shoe (84) is triangular in shape, connecting portion (81) then is positioned at this leg-of-mutton center, and described first support end (841) and second support end (842) lay respectively on this gripper shoe (84).

18, abrasive belt type grinding tool as claimed in claim 17 is characterized in that: this working head (8) also comprises the 3rd support end (843).

19, abrasive belt type grinding tool as claimed in claim 18, it is characterized in that: this working head also is provided with tensioning apparatus on (8), comprises casting die (88), and this casting die (88) comprises two depression bars (881), corresponding depression bar (881) is formed with groove (844) on gripper shoe (84).

20, abrasive belt type grinding tool as claimed in claim 19 is characterized in that: this groove (844) is respectively formed between first support end (841) and the 3rd support end (843) and between second support end (842) and the 3rd support end (843).

21, abrasive belt type grinding tool as claimed in claim 20 is characterized in that: also be connected with cushion (85) on this first support end (841) and second support end (842), this cushion (85) is curved.

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