CN2195990Y

CN2195990Y - Gripping device for drilling machine

Info

Publication number: CN2195990Y
Application number: CN 94203322
Authority: CN
Inventors: 游友民
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-01-28
Filing date: 1994-01-28
Publication date: 1995-05-03
Anticipated expiration: 2004-01-28

Abstract

The utility model relates to a machine tool accessory, particularly a gripping device for drilling machine. The gripping device for drilling machine is composed of a body, a end shield, an inner sleeve, an outer sleeve, a hook, a roller cover, a roller, a bearing, a dust cover and a gripping screw. An axial direction force limiting mechanism is arranged between the roller cover and the end shield, a radial direction force limiting mechanism have on board is arranged between the body and the gripping screw, and the utility model is additionally provided with a roller cover raceway and a body raceway. The utility model is not slip in primary gripping and has no influence on dismounting the drill head when the drill thrust is increased. The utility model has the advantages of fast gripping, high precision, long service life, etc. and is widely used in various drilling machine tools and electrical tools.

Description

Gripping device for drilling machine

The utility model relates to machine tool accessories, especially keyless drill chuck.

Self-tightening drill chuck is a kind of more advanced annex in the present machine tool accessories in the world, is specially adapted to precision machine tool.The applicant is in " roller keyless drill chuck " (patent No. 912095571) of application on May 31st, 91, overcome main body and interior cover abrasion effectively and the drawback of jam has taken place, but still exist just tight easily sliding, can't den bohrkopf abbauen when cutting force increases gradually etc. disadvantage, limited application.

The keyless drill chuck that the purpose of the utility model is to provide a kind of just tightly not to be slided, drill thrust does not influence the update of den bohrkopf abbauen yet when increasing.

Ring power keyless drill chuck adopts installation shaft to limitting force mechanisms, radially limitting force mechanisms, and the method for setting up raceway realizes above-mentioned purpose.

Ring power keyless drill chuck is contained in the interior cover on the end shield by main body and dress end shield thereon, the overcoat that puts in being contained in, and the claw that is contained in the overcoat is formed.Between main body and the interior cover roller lid, roller, bearing and dust cover are housed, between main body and the overcoat self-tightening screw nail are arranged.Between roller lid and the end shield axial limit force mechanisms is housed, is equipped with between main body and the self-tightening screw nail and radially limits force mechanisms.Axially limit force mechanisms and radially limit force mechanisms to be contained in simultaneously on the drill chuck, also only dress is axially limit force mechanisms or is radially limit force mechanisms.Meanwhile, cover at roller and to set up roller lid raceway, on main body, set up the main body raceway.

Below in conjunction with embodiment shown in the drawings, the utility model will be further described.

Accompanying drawing 1 is the utility model front view, among the figure: 1, thrust bearing, 2, main body, 3, end shield, 4, restriction screw, 5, relief spring, 6, cylindrical spring, 7, ratchet, 8, roller lid, 9, roller lid raceway, 10, roller, 11, main body raceway, 12, axle sleeve, 13, interior cover, 14, nut, 15, bearing, 16, overcoat, 17, dust cover, 18, self-tightening screw nail, 19, claw.Accompanying drawing 2 is ratchet front views.Accompanying drawing 3 is ratchet left views.

As shown in Figure 1, ring power keyless drill chuck is contained in the interior cover 13 on the end shield 3 by main body 2 and dress end shield 3 thereon, and the overcoat 16 in being contained on the cover 13 is contained in that claws 19 in the overcoat 16 form.Roller lid 8, roller 10, bearing 15 and dust cover 17 are housed between main body 2 and the interior cover 13.Self-tightening screw nail 18 is arranged between main body 2 and the overcoat.

Be contained in axial limit force mechanisms between roller lid 8 and the end shield 3, be equipped with between main body 2 and the self-tightening screw nail 18 and radially limit force mechanisms.Axially limit force mechanisms and radially limit force mechanisms to be contained in simultaneously on the drill chuck, also only dress is axially limit force mechanisms, and perhaps only dress is radially limit force mechanisms.

On roller lid 8, set up roller lid raceway 9, on main body 2, set up main body raceway 11.

Axially the limit force mechanisms comprises the ratchet 7 that is contained between end shield 3 and the roller lid 8, is contained in the restriction screw 4 on the end shield 3, is contained in the cylindrical spring 6 and relief spring 5 on ratchet 7 both sides.

The nut of radially limitting force mechanisms to comprise to be contained on the self-tightening screw nail 18 14 is contained in axle sleeve 12 and thrust bearing 1 between nut 14 and the main body 2.

The external diameter of self-tightening screw nail 18 has been done adjustment, to increase clamping force, prevents that drill bit from slippage taking place when drilling.

The above-mentioned improvement of ring power keyless drill chuck has obtained tangible technique effect.

Set up after the axial limit force mechanisms, not only clamping force surpasses nearly 2 times of spanner drill chuck national normal value, and can auto lock during overloading.When main body 2 is stressed, cylindrical spring 6 downward pressurizeds, ratchet 7 work, and relief spring 5 is inoperative.When stressed overrate, relief spring 5 works, and clamping force no longer increases, the drill bit drilling that does as usual, move back when boring as long as with hand once twisting den bohrkopf abbauen trippingly.

In like manner, increase and radially limit after the force mechanisms, when main body 2 stressed overrates, axle sleeve 12, thrust bearing 1 automatic slippage no longer increase clamping force, and can keep the precision of taper shank.

After setting up roller lid raceway 9 and main body raceway 11, can avoid disadvantages such as two raceways and load mould on roller lid 8 and main body 2, occurring, prolong the service life of drill chuck.

The bit diameter of ring power keyless drill chuck clamping has six kinds of specifications such as 4～16 grades.

Obviously, the utlity model has just tightly sliding, drill thrust does not influence den bohrkopf abbauen when increasing yet, and self-tightening is fast, precision is high, the life-span is long, advantage such as all can use in rugged environment, is widely used in various drilling machines and electric tool.

The external diameter 50mm of ring power keyless drill chuck shown in the drawings, length 87mm, maximum grip diameter 13mm.

Claims

1, a kind of ring power keyless drill chuck, by main body (2) and dress end shield (3) thereon, be contained in the interior cover (13) on the end shield (3), be contained in the overcoat (16) on the interior cover (13), the claw (19) that is contained in the overcoat (16) is formed, roller lid (8), roller (10), bearing (15) and dust cover (17) are housed between main body (2) and the interior cover (13), between main body (2) and the overcoat (16) self-tightening screw nail (18) are arranged, it is characterized in that:

Between-roller lid (8) and the end shield (3) axial limit force mechanisms is housed, be equipped with between main body (2) and the self-tightening screw nail (18) and radially limit force mechanisms, axially limit force mechanisms and radially limit force mechanisms to be contained in simultaneously on the drill chuck, also only dress is axially limit force mechanisms or is radially limit force mechanisms;

-on roller lid (8), set up roller lid raceway (9), on main body (2), set up main body raceway (11).

2, by the described drill chuck of claim 1, it is characterized in that axially limitting force mechanisms to comprise and be contained in the ratchet (7) between end shield (3) and the roller lid (8), be contained in the restriction screw (4) on the end shield (3), be contained in the cylindrical spring (6) and relief spring (5) on ratchet (7) both sides.

3, by claim 1 or 2 described drill chucks, it is characterized in that radially limitting force mechanisms to comprise and be contained in the nut (14) on the self-tightening screw nail (18), be contained in axle sleeve (12) and thrust bearing (1) between nut (14) and the main body (2).