CN202200115U

CN202200115U - Drill bit grinder

Info

Publication number: CN202200115U
Application number: CN2011202971064U
Authority: CN
Inventors: 王坤煌
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-08-12
Filing date: 2011-08-12
Publication date: 2012-04-25
Anticipated expiration: 2021-08-12

Abstract

The utility model relates to a drill bit grinder which comprises a grinding unit, a drill bit positioning unit, a correcting unit and a fixture which are arranged on a bed. The grinding unit is provided with a rotating grinding wheel. The drill bit positioning unit comprises a longitudinal and transverse distance regulating component and a lifting unit positioned above the longitudinal and transverse distance regulating component. The lifting unit is assembled with the fixture to clamp a drill bit. The correcting unit comprises a straight vertical rod. A corresponding pointer with adjustable height and direction is arranged at the top of the vertical rod. The corresponding pointer points to the connecting position of the grinding wheel and the drill bit so as to realize the alignment in the process of clamping the drill bit, thereby fulfilling the aims of rapidly positioning and accurately grinding.

Description

Drill grinder

Technical field

The utility model relates to grinder, particularly a kind of drill grinder that can grind according to each cutting face of drill bit adjustment angle.

Background technology

General carpenter's machine is as shown in Figure 1 in order to the drill bit of boring; The center, end of this drill bit has the tip 1 of a location; These 1 both sides, tip are corresponding to have a pair of cutting end part 2; Each constitutes between 3, the two cutting limits 3, cutting limit of two spirals with this drill bit of twice helix winding and has a chip removal ditch 4 this cutting end part 2 at a certain angle, therefore between this cutting end part 2 and this tip 1, is formed with one first cutting face 5; These first cutting face, 5 peripheries have second cutting face 6 with these first cutting face, 5 different angles, and these second cutting face, 6 peripheries have one the 3rd cutting face 7 again.Hole when cutting facing to workpiece at this drill bit with this; This tip 1 can pierce the workpiece location earlier; This to cutting end part 2 again to this workpiece rotary drilling; It is thus clear that this drill bit contacts first cutting face 5, second cutting face 6 and the 3rd cutting face 7 of the cutting workpiece rust that can be worn at first, uses a period of time must utilize abrasive wheel to grind and could become profit.And traditional abrasive drill is the person of seeing service to hand this drill bit, with aforesaid this first cutting face 5, second cutting face 6 and the 3rd cutting face 7 contact abrasive wheels, reaches and sharpens function; This shows, judge respectively this first cutting face 5, second cutting face 6 and the 3rd cutting face 7 of grinding out according to artificial experience, can not keep original accurate angle is maximum shortcoming; The dealer can prepare the drill bit use of most different sizes in addition; When the drill bit that some is arranged need grind, the professional who just gives the tool experience handled, and this drill bit quantity of depositing fully will enough continue to use; Just can not delay the carrying out of boring work, and feel more time-consuming bothersome.

Summary of the invention

The main purpose of the utility model is to provide a kind of drill grinder, and this drill grinder can be according to the cutting face angle adjustment location of drill bit, is convenient to contact with an abrasive wheel grind, and it is quick and grind effect accurately to reach the location.

For reaching above-mentioned purpose, the utility model has been taked following technical scheme:

A kind of drill grinder comprises: a grinding unit, be provided in a side of on the support, and this grinding unit has an abrasive wheel, and this abrasive wheel receives the driven in rotation of a power source; One drill bit positioning unit; This drill bit positioning unit includes one in length and breadth to the roll adjustment assembly; This is provided in a side of a side of this support in length and breadth to the roll adjustment assembly, this establishes a lifting unit to roll adjustment assembly top in length and breadth, and this lifting unit connects anchor clamps; These anchor clamps comprise an axle sleeve and and are enclosed within the rotating shaft in this axle sleeve; This axle sleeve is connected with this lifting unit through a connecting seat, and this rotating shaft is in the face of this abrasive wheel direction folder system one drill bit, and this abrasive wheel periphery is to match with to be ground angle of this drill tip; And a correcting unit, this correcting unit comprise directly to a montant, this montant is erected at this in length and breadth to the roll adjustment assembly, this montant is established a corresponding pointer, the abrasion site that this this abrasive wheel of correspondence pointed contacts with this drill bit.

Further, this support of the utility model drill grinder establish one illuminate this abrasive wheel and this drill bit light fixture.

Further; This of the utility model drill grinder in length and breadth to the roll adjustment assembly comprise one have vertical protrusion top the first dovetail seat, one and this first dovetail seat top assembly can be along the second dovetail seat of this first dovetail seat vertical shift; And one and this second dovetail seat laterally protrude the top assembly can be along the 3rd dovetail seat of this second dovetail seat transverse shift; An elongated slot is established in one side of the 3rd dovetail seat; This montant bottom is established at least one with this elongated slot assembly and along the slide block of this elongated slot displacement, this slide block wear through a Connection Element and with this elongated slot locking.

Further; The top of this montant of the utility model drill grinder has a thread segment, and this thread segment and a swivel nut are sealed, and one first ring set of hollow is established at this swivel nut top; This first ring set is enclosed within this montant periphery; This first ring set outside establish with this first ring set disalignment to one second ring set, this correspondence pointer one end has a head greater than this second ring set diameter, the other end is established a tip of taper; This abrasive wheel is pointed in this tip, but establishes an elastomer of axial stretching between this head and this second ring set.

Further, this second ring set of the utility model drill grinder is the interlocking positioning piece radially, and this keeper end presses closer this correspondence pointer perisporium.

Further, this lifting unit of the utility model drill grinder comprises: the shell block of a hollow, a hollow and pack into from top to bottom lifting shaft, in this shell block pack into from bottom to top impeller-hub in this lifting shaft, an axial stretching elastic component and one with this lifting shaft 90 gears of spending each other, the axle of this gear is provided with the leader; This shell block is located at the 3rd dovetail seat top, and a retaining wall is established in this lifting shaft inside, and this impeller-hub top has a bulge loop; The below has a capping, and this bulge loop receives this retaining wall fastening, sheathed this elastic component of this impeller-hub periphery; This elastic component one this bulge loop of end ejection; The other end is butted on this capping, this capping and the locking of this shell block bottom, and this lifting shaft periphery is established a tooth row; This tooth row and this gear combination, this lifting shaft top and this Connection Block assembly.

Further, between this lifting shaft periphery and this shell block top of the utility model drill grinder, be provided with a dirt-proof boot of hollow.

Further, this shell block of the utility model drill grinder is the shaft-like brake component of interlocking radially, and this brake component one end props up this lifting shaft, and the other end is established a rotation handle.

Further, this shell block of the utility model drill grinder is radially established an elasticity press button, and an end of this elasticity press button stretches out in this shell block outside, and the other end embeds a pit of this lifting shaft outer wall.

Further; Angle index wheel is established in this rotating shaft of the utility model drill grinder; This axle sleeve tool one datum line, the scale on this datum line and this angle index wheel is relative, the collet of an end interlocking one this drill bit of folder system of this rotating shaft; Through the combination of semicircular male and fomale(M&F), and wearing this Connection Block with two lock members, to lock this axle sleeve more fixed between this Connection Block and this axle sleeve.

Further; One side of this Connection Block of the utility model drill grinder is established semicircular one protruding wall; This boss face is established a semicircular annular groove to this protruding wall; This annular groove with should be protruding wall combination, this Connection Block through this lock member penetrate with this annular groove in a spiral shell spare sealed, this spiral shell spare is shifted along this annular groove.

Further, this axle sleeve of the utility model drill grinder is radially established a retainer, and this retainer end is tight against the outer wall of this rotating shaft.

Hence one can see that, and the utility model provides a kind of drill grinder, comprising: a grinding unit, a drill bit positioning unit, a correcting unit and anchor clamps are configured on the support jointly.

This grinding unit has an abrasive wheel, and this drill bit positioning unit comprises: have digital calibration one in length and breadth to the roll adjustment assembly, one is positioned at the lifting unit that this can move up and down in length and breadth on the roll adjustment assembly; This lifting unit top tool a connecting seat, this Connection Block is connected with an axle sleeve of anchor clamps, and this axle sleeve is rotatable and passes through two lock members location; A rotating shaft is pivoted in this axle sleeve; Aims at a datum line through angle index wheel between this rotating shaft and this axle sleeve, supply the grinding control rotation angle range, this rotating shaft is pressed from both sides in the face of this abrasive wheel direction and is made a drill bit; This correcting unit comprise directly to a montant; A corresponding pointer of adjustable height and direction is established at this montant top, and the position that this abrasive wheel periphery of this correspondence pointed grinds this drill bit supplies this this drill bit of anchor clamps folder system bevel adjustment to be cut angle position.

The utlity model has following advantage:

1. the utility model can solve known professional with the tool experience and carries out abrasive drill and have inadequately precisely and time-consuming problem of taking a lot of work.

2. this drill bit positioning unit of the utility model has digital calibration to the roll adjustment assembly in length and breadth, can accurately measure this drill bit near this abrasive wheel position, and this axle sleeve is rotatable location; Be convenient to this rotation shaft regulated its to elevation scale that should abrasive wheel; This rotating shaft has the datum line that the angle index wheel cooperates this axle sleeve in addition, when being beneficial to operator's abrasive drill, and visual controlling at preset angular range; This correcting unit of the utility model can be to should drill bit and this abrasive wheel relative position in addition; Be set in certain height and angle position with adjustment, it is more easy fast to be convenient to follow-up drill bit to be ground location, and can obtain to grind accurately the angle position.

Description of drawings

Fig. 1 is carpenter's machine drill head perspective view.

Fig. 2 is the perspective view of the utility model embodiment.

Fig. 3 is the perspective view of another angle of the utility model embodiment.

Fig. 4 is the planar structure schematic representation intention of the utility model embodiment.

Fig. 5 is the utility model embodiment lifting shaft and gear combination sketch map.

Fig. 6 is the perspective view of the utility model embodiment Connection Block and anchor clamps.

Fig. 7 uses sketch map for the utility model embodiment.

Perspective view when Fig. 8 uses for the utility model embodiment.

The specific embodiment

About the aforementioned of the utility model and other technology contents, characteristics and effect, in the detailed description of following cooperation, can clearly appear with reference to the preferred embodiment of accompanying drawing.

See also Fig. 2 to shown in Figure 4, the utility model is a kind of drill grinder, comprising: a grinding unit 20, a drill bit positioning unit 30, a correcting unit 40 and anchor clamps 33 are configured on the support 10 jointly.

This grinding unit 20 has an abrasive wheel 21, and this abrasive wheel 21 receives the driven in rotation of a power source such as motor (figure does not show).

This drill bit positioning unit 30; Comprise be positioned at these support 10 1 sides one in length and breadth to roll adjustment assembly 31; One is positioned at this lifting unit that on roll adjustment assembly 31, can move up and down in length and breadth 32; This lifting unit 32 connects anchor clamps 33; These anchor clamps 33 are in the face of this abrasive wheel 21 directions folder system one drill bit 34; This comprises to roll adjustment assembly 31 in length and breadth: one have vertical protrusion top the first dovetail seat 311, one and the second dovetail seat 312 of these first dovetail seat, 311 top assembly and one and horizontal the 3rd dovetail seats 313 of protrusion top assembly of this second dovetail seat 312, this second dovetail seat 312 is established one first screw rod 316, one first screw (figure does not show) combination of this first screw rod 316 and this first dovetail seat 311; Rotate 316 of this first screw rods and can drive this second dovetail seat 312 along these first dovetail seat, 311 vertical shifts; The 3rd dovetail seat 313 is established one second screw rod 317, and this second screw rod 317 makes up with one second screw (figure does not show) of the 3rd dovetail seat 313, rotates 317 of this second screw rods and can drive the 3rd dovetail seat 313 along these second dovetail seat, 312 transverse shifts.

In addition, this first screw rod 316 and second screw rod 317 are provided with digital calibration 315, and learning this second dovetail seat 312 and the 3rd dovetail seat 313 displacement stroke, and this support 10 establishes a light fixture 50, and this light fixture 50 is used to illuminate this abrasive wheel 21 and this drill bit 34.

This lifting unit 32 is please consulted Fig. 4 and shown in Figure 5 more in the lump, comprises: but the elastic component 324 and a gear 12 of the lifting shaft of the shell block 321 of a hollow, a hollow 322, an impeller-hub 323, an elastic telescopic; This shell block 321 is installed in the 3rd dovetail seat 313 tops, and this lifting shaft 322 is to pack into from top to bottom in this shell block 321, and these lifting shaft 322 inside have a retaining wall 326; This impeller-hub 323 is to pack into from bottom to top in this lifting shaft 322, and these impeller-hub 323 tops have a bulge loop 327, and this bulge loop 327 receives the location of replacing of this retaining wall 326; These impeller-hub 323 belows have a capping 328, sheathed this elastic component of these impeller-hub 323 peripheries (as being one first spring) 324, this this bulge loop 327 of elastic component 324 1 end ejections; The other end is butted on this capping 328, this capping 328 and this shell block 321 bottoms locking, and these lifting shaft 322 peripheries are established a tooth row 329; This shell block 321 gear 12 that is pivoted; This gear 12 and this lifting shaft 322 be 90 degree each other, this tooth row 329 and this gear 12 combinations, and the axle of this gear 12 is provided with leader 13; Make this gear 12 receive this handle 13 driven in rotation, move down thereby drive on this lifting shaft 322.

And this shell block 321 radially the shaft-like brake component (as being one first screw) of interlocking but the elasticity press button 17 of 14 and one elastic telescopic; Can consult Fig. 2, Fig. 3, Fig. 4 and Fig. 5 again; These brake component 14 1 ends prop up the periphery wall of this lifting shaft 322; The other end is established a rotation handle 15, and an end of this elasticity press button 17 stretches out in the outside of this shell block 321, and the other end is embedded in a pit 3221 of these lifting shaft 322 outer walls.

In addition; These lifting shaft 322 top interlocking a connecting seat 325 are please consulted Fig. 2, Fig. 4 and shown in Figure 6 in the lump, and a side of this Connection Block 325 is established semicircular one protruding wall 327a; Between these lifting shaft 322 peripheries and this shell block 321 tops, but establish a dirt-proof boot 11 of hollow elastic telescopic.

These anchor clamps 33; Comprise an axle sleeve 331 and a rotating shaft 332 of tubular, this rotating shaft 332 is enclosed within this axle sleeve 331, and angle index wheel 333 is established in this rotating shaft 332; This axle sleeve 331 has a datum line 334; This datum line 334 is relative with the scale that this angle index is taken turns on 333, this rotating shaft 332 1 end interlockings one collet 335, these collet 335 these drill bits 34 of folder system.

Through semicircular male and fomale(M&F) combination, pass this Connection Block 325 and lock this axle sleeve 331 fixed with two lock members (as being one first bolt) 16 again between this Connection Block 325 and this axle sleeve 331.This axle sleeve 331 is established a semicircular annular groove 336 in the face of this protruding wall 327a in the present embodiment; This annular groove 336 cooperates with this protruding wall 327a; This two lock member 16 passes after this Connection Block 325 and is sealed with the spiral shell spare 338 in this annular groove 336, and this spiral shell spare 338 is provided with along these annular groove 336 annulars, and this axle sleeve 331 is radially established a retainer 337; Can consult Fig. 2, these retainer 337 ends are tight against the outer wall of this rotating shaft 332.

This correcting unit 40; Please consult Fig. 3, Fig. 4 and shown in Figure 7 in the lump; Comprise directly to a montant 41 and be positioned at a corresponding pointer 42 of these montant 41 tops, at least one slide block 43 is established in the bottom of this montant 41, elongated slot 314 assembly of this slide block 43 and the 3rd dovetail seat 313; Make this slide block 43 along these elongated slot 314 displacements, this slide block 43 is arranged in this elongated slot 314 lockings through a Connection Element (as being one second screw) 60.The top of this montant 41 has a thread segment 44; This thread segment 44 and a swivel nut 45 are sealed, and one first ring set 46 of hollow is established at these swivel nut 45 tops, and this first ring set 46 is enclosed within this montant 41 peripheries; This montant 41 top interlockings one cap head 47; This cap head 47 these first ring sets 46 of compacting, these first ring set, 46 outsides establish with these first ring set, 46 disalignments to one second ring set 48, this correspondence pointer 42 is arranged in this second ring set 48; These correspondence pointer 42 1 ends have a head 421 greater than these correspondence pointer 42 diameters; The other end is established a tip 422 of taper, and this abrasive wheel 21 is pointed in this tip 422, but establishes an elastomer (as being one second spring) 49 of axial stretching between this head 421 and this second ring set 48; This second ring set 48 is interlocking positioning piece (as being one second bolt) 70 radially, and these keeper 70 ends press closer this correspondence pointer 42 perisporiums.

Through said structure, are 22 degree by angle one side in terminal two cutting faces to be ground of general drill bit 34, and the angle of opposite side is 35 degree; See also Fig. 7, Fig. 8; And the outside is to match with these drill bit 21 two cutting face angles to be ground in this abrasive wheel 21 peripheries, so these abrasive wheel 21 inboard angles are 22 degree, and outside angle is 35 degree; So two cutting faces to be ground of this drill bit 34 just and these abrasive wheel 21 peripheries match, to grind.

In addition, 34 pairs on this drill bit should abrasive wheel 21 be the 11 degree elevations angle approximately, and the spiral angle in cutting face to be ground is dextrorotation 17 degree approximately; Please consult Fig. 3, Fig. 4 and shown in Figure 6 more in the lump, during operation, this drill bit 34 is packed into this collet 335; Regulate earlier this first screw rod 316 and second screw rod 317, with mobile this second dovetail seat 312 and the 3rd dovetail seat 313 near this abrasive wheel 21, and this lock member 16 that gets loose; Be convenient to adjust this axle sleeve 331, making the tilt angle that 34 pairs on drill bit should abrasive wheel 21 is in 11 degree positions, locks this lock member 16 again and reaches the location; Then regulate this drill bit 34 its two cutting faces to be ground are contacted with this abrasive wheel 21, and this brake component 14 that locks is this lifting shaft 322 location, this retainer 337 and rotate this rotating shaft 332 again gets loose; Make this angle index wheel 333 signs 0 place corresponding with the datum line 334 of this axle sleeve 331; Reach and make zero, be beneficial to when grinding this drill bit 34, can control the marker location of this rotating shaft 322 of dextrorotation to predetermined 17 degree.

Loosen this brake component 14 when grinding earlier; Elastic force through this elastic component 324 raises on this lifting shaft 322 and moves, and this anchor clamps 33 are risen, and can elasticity embeds the pit 3221 of this lifting shaft 322 up to the other end of this elasticity press button 17; Make this lifting shaft 322 be positioned at predetermined altitude; Press down this handle 13 when to be ground and drive this gear 12 and drive these lifting shafts 322 and move down, and flick this elasticity press button 17 and break away from these pits 3221, touch this abrasive wheel 21 and can grind when this drill bit 34 can move down.

In addition, unclamp this Connection Element 60, to move this montant 41 near these abrasive wheel 21 positions; And change the swivel nut 45 of these montant 41 tops of pine, and make this correspondence pointer 42 adjustment angles, can try to promote should correspondence pointer 42; Can be up to this tip 422 to the abrasion site that contacts with this drill bit 34 to this abrasive wheel 21; Change tight this swivel nut 45 again, and change tight this keeper 70 again after adjusting tip 422 extension elongations of this correspondence pointer 42, make this correspondence pointer 42 location; So let correcting unit 40 be set in certain height and angle position, the correction reference when being convenient to as follow-up this drill bit 34 of grinding.

So this drill bit 34 can be located after being made by these collet 335 folders fast; Start the power source of this grinding unit 20, and change this brake component 14 of pine, rotate the handle 13 in these gear 12 outsides; This lifting shaft 322 is descended to move down to drive this drill bit 34; This drill bit 34 cutting faces to be ground are ground by this abrasive wheel 21, and this rotating shaft 332 of dextrorotation makes 334 pairs of this datum lines indicate the positions of 17 degree to this angle index wheel 333, so this abrasive wheel 21 can grind along the spiral angle of this drill bit 34; This elastic component 324 can be compressed; Up to discharging this handle 13, the restoring force through this elastic component 324 is bullet on this lifting shaft 322, and these anchor clamps 33 are being with this drill bit 34 to rise to reset.

The utlity model has following advantage:

1. the utility model can solve the problem accurately that has inadequately when known professional of having had experience carries out abrasive drill.

2. the utility model drill bit positioning unit 30 has digital calibration 315 to first screw rod 316 and second screw rod 317 of roll adjustment assembly 31 in length and breadth; Can accurately measure the position of this drill bit 34, and be rotatable location between this Connection Block 325 and this axle sleeve 331, be convenient to this rotating shaft 332 and regulate it elevation scale that should abrasive wheel 21 near abrasive wheel 21; In addition; Have angle index wheel 333 in this rotating shaft 332, this angle index wheel 333 cooperates the datum line 334 of this axle sleeve 331, when being beneficial to operator's abrasive drill 34; Visual setting also is rotated in preset angular range, to reach easy and accurate purpose.In addition this correcting unit 40 of the utility model can to should drill bit 34 with these abrasive wheel 21 relative positions, and adjustment is set in certain angle position, it is more easy fast to be convenient to follow-up drill bit to be ground 34 location, and can obtain to grind accurately the angle position.

Claims

1. drill grinder comprises:

One grinding unit (20) is provided in a side of on the support (10), and this grinding unit (20) has an abrasive wheel (21), and this abrasive wheel (21) receives the driven in rotation of a power source;

One drill bit positioning unit (30), this drill bit positioning unit (30) include one in length and breadth to roll adjustment assembly (31), and this is provided in a side of this support (10) in length and breadth to roll adjustment assembly (31) a side is characterized in that:

This establishes a lifting unit (32) to roll adjustment assembly (31) top in length and breadth; This lifting unit (32) connects anchor clamps (33); These anchor clamps (33) comprise an axle sleeve (331) and and are enclosed within the rotating shaft (332) in this axle sleeve (331); This axle sleeve (331) is connected with this lifting unit (32) through a connecting seat (325), and this rotating shaft (332) is in the face of this abrasive wheel (21) direction folder system one drill bit (34), and this abrasive wheel (21) periphery is to match with to be ground terminal angle of this drill bit (34); And

One correcting unit (40); This correcting unit (40) comprise directly to a montant (41); This montant (41) is erected at this in length and breadth to roll adjustment assembly (31), and this montant (41) is established a corresponding pointer (42), and this correspondence pointer (42) points to the abrasion site that this abrasive wheel (21) contacts with this drill bit (34).

2. drill grinder as claimed in claim 1 is characterized in that: this support (10) establish one illuminate this abrasive wheel (21) and this drill bit (34) light fixture (50).

3. drill grinder as claimed in claim 1; It is characterized in that: this in length and breadth to roll adjustment assembly (31) comprise one have vertical protrusion top the first dovetail seat (311), one and this first dovetail seat (311) top assembly can be along the second dovetail seat (312) of this first dovetail seat (311) vertical shift; And one and this second dovetail seat (312) laterally protrude the top assembly can be along the 3rd dovetail seat (313) of this second dovetail seat (312) transverse shift; An elongated slot (314) is established in one side of the 3rd dovetail seat (313); This montant (41) bottom is established at least one with (314) assembly of this elongated slot and along the slide block (43) of this elongated slot (314) displacement, this slide block (43) wears through a Connection Element (60) and locks with this elongated slot (314).

4. drill grinder as claimed in claim 3; It is characterized in that: the top of this montant (41) has a thread segment (44); This thread segment (44) is sealed with a swivel nut (45); One first ring set (46) of hollow is established at this swivel nut (45) top, and this first ring set (46) is enclosed within this montant (41) periphery, this first ring set (46) outside establish with this first ring set (46) disalignment to one second ring set (48); These correspondence pointer (42) one ends have a head (421) greater than this second ring set (48) diameter; The other end is established a tip (422) of taper, and this abrasive wheel (21) is pointed in this tip (422), this head (421) and this second ring set (48) but between establish the elastomer (49) of axial stretching.

5. drill grinder as claimed in claim 4 is characterized in that: this second ring set (48) is interlocking positioning piece (70) radially, and this keeper (70) end presses closer this correspondence pointer (42) perisporium.

6. drill grinder as claimed in claim 3; It is characterized in that: this lifting unit (32) comprises: the shell block of a hollow (321), a hollow also pack into the elastic component (324) and one and this lifting shaft (322) 90 gears (12) of spending each other that lifting shaft (322), in this shell block (321) in packs into impeller-hub (323) in this lifting shaft (322), an axial stretching from bottom to top from top to bottom; The axle of this gear (12) is provided with leader (13), and this shell block (321) is located at the 3rd dovetail seat (313) top, and a retaining wall (326) is established in this lifting shaft (322) inside; This impeller-hub (323) top has a bulge loop (327); The below has a capping (328), and this bulge loop (327) receives this retaining wall (326) fastening, sheathed this elastic component of this impeller-hub (323) periphery (324); These elastic component (324) one these bulge loops of end ejection (327); The other end is butted on this capping (328), this capping (328) and the locking of this shell block (321) bottom, and this lifting shaft (322) periphery is established a tooth row (329); This tooth row (329) and this gear (12) combination, this lifting shaft (322) top and this Connection Block (325) assembly.

7. drill grinder as claimed in claim 6 is characterized in that: between this lifting shaft (322) periphery and this shell block (321) top, be provided with a dirt-proof boot (11) of hollow.

8. drill grinder as claimed in claim 6 is characterized in that: this shell block (321) is the shaft-like brake component (14) of interlocking radially, and these brake component (14) one ends prop up this lifting shaft (322), and the other end is established a rotation handle (15).

9. drill grinder as claimed in claim 6 is characterized in that: this shell block (321) is radially established an elasticity press button (17), and an end of this elasticity press button (17) stretches out in this shell block (321) outside, and the other end embeds a pit (3221) of this lifting shaft (322) outer wall.

10. drill grinder as claimed in claim 1; It is characterized in that: angle index wheel (333) is established in this rotating shaft (332); This axle sleeve (331) tool one datum line (334); This datum line (334) is relative with the scale that this angle index is taken turns on (333); The collet (335) of one end interlocking one folder this drill bit of system (34) of this rotating shaft (332) makes up through semicircular male and fomale(M&F) between this Connection Block (325) and this axle sleeve (331), and wearing this Connection Block (325) with two lock members (16), to lock this axle sleeve (331) more fixed.

11. drill grinder as claimed in claim 10; It is characterized in that: a side of this Connection Block (325) is established semicircular one protruding wall (327a); This axle sleeve (331) is established a semicircular annular groove (336) in the face of this protruding wall (327a); This annular groove (336) with should protruding wall (327a) combination, this Connection Block (325) penetrates with the interior spiral shell spare (338) of this annular groove (336) sealed through this lock member (16), this spiral shell spare (338) is shifted along this annular groove (336).

12. drill grinder as claimed in claim 10 is characterized in that: this axle sleeve (331) is radially established a retainer (337), and this retainer (337) end is tight against the outer wall of this rotating shaft (332).