IL38866A - Tool chuck with interfitted gear and body - Google Patents

Abstract

1389041 Chucks BLACK & DECKER MFG CO 10 March 1972 [22 March 1971] 11327/72 Heading B3B A tool chuck for an electric drill 19 comprises a body 13 having a plurality of apertures 25 converging towards one end of the body, a jaw 23 slidably supported in each of the apertures and having gear teeth 29 formed thereon, and a gear 26 rotatably supported on the body and provided with internal gear teeth 27 engageable with the teeth of the jaws whereby rotation of the gear is effective to move the jaws in the apertures 25 to grip or release a tool bit 22, the chuck being characterized by the gear 26 and body 13 having interengaging means, e.g. a lip 47 and a recess 43, to prevent axial movement in either direction of the gear on the body, the said means being disposed wholly between the internal gear teeth on the gear 26 and the said one end of the body. The gear 26 may be made from a plurality of arcuate segments held in position by a cover 49 which includes a rolled over end 51 which is an interference fit on the said arcuate portion. The cover 49 is also a dirt guard. [GB1389041A]

Description

OS iitV and BLACK ABSTRACT OP THE W A tool for drills the like including a body gripping supported in tapered ways formed in the A split nut rotatably supported o the body threadedly engages the and is operable to engage and release the from a nut and body are intermitted to rotatabl support and axially retai the nu on the A cup is fitted on the nut to hold it together and on the body together the interfitted body and protects the internal chuck parts dirt and other oreign OF the mos relevant prior art is United States patent shows a drawn cup sleeve functioning as a cover for the rear portion of a the sleeve in patent is loosely fitted on the body and is retained against axial rearwardly of by means of a an annular on the Neither patent paten or patents and teach axial retention of a in an annular groove on a chuck which annular groove is wholly independent of the tooth between the nut and chuck aws an preferably disposed forwardly of that toothed OF SSI present inventio is directed to a chuck for use with electric drills and the which chuck embodies a novel interfitted gear and This constructio facilitates the use of smaller stock which various components are thereby reducing the materials In addition to being relatively the chuck of the present invention embodies relatively few parts and light in while being accurate and reliable in and possessing long Main objects of the present are to provide an improved tool including a a plurality of and a wherein the body and gea are in a novel manner accurate rotatable support and axial retention of the gear on the which prevents foreign from gaining access to the interio of the an which by said facilitates low materials manufacturing Further of the present invention are to provide an improved chuck of the above character which is relatively light durable in and reliable and accurate in Other OBJECTS and advantages of the present invention will become more apparent from a consideration of the detailed scription to follow taken in conjunction with the BRIEF DESCRIPTION OF THE DRAWINGS 1 is a longitudinal section view illustrating a tool chuck embodying the present inventio 2 is an end view of the construction of 3 is an enlarged view of a portion of 4 is an exploded view of a portion of STATEMENT THE INVENTION Broadly the present invention relates to a tool chuck comprising a body haying a plurality of ways said ways converging toward the front of said jaws supported in said ways and having gear teeth a gear rotatably supported on said body and having nal gear teeth threadedly engaging the teeth on said by rotation of said is effective to nally of said said gear and said body having interfitting means disposed wholly toward the front of said body said gear teeth preventing axial movement of said gear relative to said In another the present invention relates to a tool chuck a body having an annular groove formed a gear including a plurality of arcuate segments rotatably ported on said body adjacent said groove and having an annular io sa d nn r roove a luralit of thereon interengaged with teeth on said y tation of said gear is effective to move said jaws radially of said body into and out of gripping with a a sheet metal cover fitted over said gear segments retaining the integrity of said gear and holding said lip in in said In still another the present invention relates to a tool chuck comprising a a gear having bearing surface means engaging bearing surface means on said body and having means integral therewith interfitted with said whereby to axially retain said gear on said jaw means slideably supported on said body and movable radially thereof into gripping engagement with a means separate from said interfitted means interengaging said gear and said jawsmeans whereby to move said jaw means in response to rotation of said gear on said said gear having bevel teeth formed a pilot opening formed in said body adjacent said gear teeth and operative to support a chuck said chuck key having a bevel gear able with said first mentioned bevel gear whereby said chuck key is operative to rotate said gear and move said In yet another the present invention includes a chuck comprising an integral body having a large diameter front portion and a reduced diameter rear portion aoapted to be nected to a a plurality of jaws slideably supported in converging ways in the front portion of said a split gear rotatably supported upon and axially interfitted with said body at its front said gear having a portion adjacent said body rear portion provided with gear teeth thereon engaging teeth ai ear support and axial on said radial pilot means in said body forwardly of and adapted to a on a said key having teeth engageable with gear teeth on said gear at the end thereof whereby said key is effective to turn said and jaws said now specifically to the a tool chuck the present invention is generally 11 in 1 and is seen to a 13 having a relatively large front and a relatively diameter rear portion the latter having a central threaded opening receiving an spindle 17 of an electric body 13 has a 21 Mm its front portion 12 adapted to receive a bit for a drill plurality of jaws 23 are slideably disposed in converging ways 25 formed the 13 and are movable into gripping with the bit 22 the bore 26 is rotatably on the body 13 has Internal gear 27 cooperatively engageable witfe teeth formed on the laws when the gear 26 is rotated on the body the 23 are caused to longitudinally in the ways and eithe into or out of converging relationship to grip or release the bit 22 disposed in the The direction the 23 move of dependent upon the direction gear The 26 has bevel teeth 31 on forward end which are cooperatively with bevel gear teeth 33 chuck key 35 operable to tarn the gear key 35 has a 37 rotatably receivable a In accordance with the present th gear 26 is r tatably supported upon and interfitted with the body in a ner adapted to accurately support the gear 26 thereon and rotain it against axial movement relative as seen in the the front portion 12 of the body 13 is provided with annular bearing surface 41 and has an annular groove 43 formed therein and adjacent the surface The gear as cludes a plurality of arcuate two cal segments which together define an internal pheral bearing surface 45 adjacent the surface The gear 26 also includes an annular inturned lip 47 formed the surface 45 and adapted to fit in the groove The gear 26 and body have engageable radial bearing surfaces 52 54 A cover 49 fits on an annular surface 50 formed on the gear segments 26b and seats against a shoulder 53 This cover 49 maintains the integrity of the gear 26 and holds the annular lip 47 in the annular groove Since the cover 49 is utilised only to maintain the integrity of the gear and to act as a dirt as will be it can be light weight and if be constructed of relatively sheet If so the cover 49 may have a double thickness 51 in the area where it gages the surface 50 on the gear segments the surfac 50 may be as while having an interference fit with the cover 49 along at least a major portion of surface to help prevent the cover 49 from pulling off the gear 26 in It will be appreciated that annular bearing surfaces and radial bearing surfaces 52 accurately support the gear 20 insufficientOCRQuality

Claims (1)

1. A tool chuck a body having a plurality of ways said ways converging toward the front of said aws slideably supported said ways and gear teeth formed a gear supported on said body and having internal gear teeth threadedly engaging the teeth on said whereby rotatio of said gear is effective to Biove the jaws longitudinally of said said gear and said body interfitting means disposed wholly the fron of said body said gear teeth preventing axial of said gear relative to said chuck as described in Claim 1 wherei said gea includes a plurality of separable arcuate together defining an annular and a cover fitting over said segments and maintaining the integrity of said annular gear A chuck as de in Claim 1 wherein said interfittin means includes interengageable annula surfaces on said gea and bod which boh rotatably suppor said gear on said body and prevent substantial axial relative movement chuck as defined in Claim 3 wherei said body has an annular said gear having an annular lip generally complementary to as defined in 2 wherein said cover has an interned rear wall closely surrounding said body and forming therewith a dust A as defined in Claim 1 wherein said body includes a relativel large diameter front portion and a relatively smal diameter rear said gear being chuck as defined in Claim 6 wherein said individual arcuate segments with said an a cover said segments and the integrity of said said cover having a inturned wall closely surroundin sad body rea chuck according to Claim comprising an integral body having a large diamete fron portion only and reduced diameter rear portion adapted to connected to a a plurality of slideably supported i converging ways in the fron portion of said a spli gear rotatably supported upon and inte with said body at its front said gear having a portion adjacent said body rear portion onl provided with gea teeth thereon engaging teeth on said means and retained solely on said gear maintaining the integrity of said gear and insuring rotatable support an axial retention on said pilot opening in said body forwardly of said gear and adapted to receive a pilot formed on a said key having gear teeth engageable with gear teeth on said gear at the forward end whereby said key is effective to turn said gear and move said jaws along said chuck as defined Claim 8 wherein said gear and said body include annular surfaces rotatably supporting said gear on said said maintaining means including a cover fitted over said A tool chuck according to Claim 1 comprising a bod having an annular groove formed a gear including a plurality of arcuate segments rotatably supported on said body adjacent said and having an annular interned lip it gear teeth being to one axial side of said groove and whereby rotation of said gear is effective to move said radially of said body into and ou of gripping a a sheet metal cover over said gea segments retaining integrity of said gear and holding li in position in said A chuck as de in Claim 10 wherein said gear segments include an annular surface receiving said cover in interfering said surface being tapered inwardly of said body in the direction of assembly of said whereby to prevent withdrawal of said cover after tool chock according to Claim a a gear having bearing surface rotatably engaging bearing means on body having means therewith with said to retain said gear on Said means slidably supported on said body and movable radially thereof into gripping engagement a means separate from and axially to side of said means operatively i gear and said means whereby to move said jaw in response to rotation o said gear on said said gear having teeth formed a pilot opening in said body adjacent said gear teeth and operative to a said chuck key having a bevel gear engageable with said mentioned gear whereby said chuck key is operative to rotate said gear move said A tool chuck comprising a a split gear rotatable on said body and having means interengaged with means on said body to retain gear against axial movement relative to said bod a luralit of aws slidabl su orted teeth formed on whereby rotation of gear is effective to said jaws radially of said body and out of gripping engagement with a tool a relatively sheet metal cove having one fitted over said split gear retaining the integrit of said gear and the interengagement of said gear on said said sheet metal cover havin one end being folded on itself forming a double thickness material at the are of engagement with said spli gear tool chuck according to Claim comprising a bod a split gear rotatable on said body and having means i terengaged with means on said body to retain said gear against axial movement relative to said a plurality of jaws slidably supported on said body and having teeth formed thereon interengaged teeth formed on said whereby rotation of gear to move said jaws radially of said body and of gripping engagement with tool said gear having an annular surface tapered inwardly toward the front of said a relatively thin sheet metal cover disposed rearwardly of said and having its forward end over tapered annular surface in interfering therewith retaining the integrity of said gear and the interengagement said gear on said said sheet metal cover forward end being folded on itself forming a double thickness material at the area of engagement with split A tool chock comprising a body a plurality of ways formed said converging toward the o said slidably supported in said ways and having gear teeth formed a gear rotatabl supported on said body and having internal gear teeth threadedly engaging the teeth on said whereby rotation of gear is effective to the longitudinally of said gear and said body having lnterfitting means disposed wholly toward the front of said body from teeth preventing axial of said gea relative to said a relatively sheet metal cover having one end fitted over said split gear retaining the integrity of gear and the lnterfitting relationship o said gear and said said sheet metal cover having one end being folded on itself forming a double thickness material at the area of engagement with said split A according to body has formed therein an annular said gear includes a plurality of arcuate rotatably supported on said body groove and has an annular and in said annular teeth are disposed wholly to one axial side of groove and lip and whereby of said gear effective to move sad jaws radially of said body and out of gripping engagement with a bit and sheet metal cover hold sad li position n said tool chuck according to Claim comprising a body a plurality ways said converging toward front of said j slidably supported in said ways and having gear teeth formed a gea rotatably supported on body and internal gear teeth threadedly engaging the teeth said whereb rotation of gear is effective to roove the aws longitudinally of gear and said body said body said gear preventing movement of said gear relative to said having an external said surface being tapered radially inwardly toward front of said a sheet cover fitted gear and holding said said said cover comprising a folded forward end and a cylindrical rearward folded end being interferingly engaged with said tapered For the Applicants insufficientOCRQuality