US1528812A - Rotary reciprocating drill - Google Patents

Description

March l0, 1925. 1,528,812

' R. BINNIE v ROTARY REC T PROCATING DRW. LL

Filed Sept. 25, 1923 2 Sheets-Sheet 2 66 Y wlTNE-sssss l--W v 625Z Li; l

lll

Patented Mar. 10, 1925.

ulxuTED STATES PATENT OFFlCBf ROBERT BINNIE, or BOLIVAR, rnNNsYLvANIa.

ROTARY RECIPBOCATING DRILL.

Application filed September 25, 1923.

ticularly to rotary-reciprocating drills of the type used for drilling rock and other similar material.

It is an object to provide a drill which is simple, strong, durable and eliicient in operation, and adapted to be driven by a motor mounted directly thereon. Y

It is a special object to provide a drill having a composite reciprocating drill rod, which is equipped with al plurality of hammers for delivering` successive sharp blows to the part carrying the drill bit.

It is also a special object to provide a drill of the character referred to which may be easily assembled and disassembled, in which the several parts forming the drill rod and the hammers associated therewith are in substantial alignment, and in which the several parts including the driving and regulating mechanism are compactly and conveniently arranged.

A still further special object is to provide an improved construction'for maintaining the drill bit in operative relation with the drill rod regardless of its insertion or withdrawal from the material being operated upon, as `well as to provide a unique form of impact hammer consisting of a plurality oi parts which can be assembled and disassembled without the employment ot .special attaching or locking devices in the form oi' bolts, screws, or the like. i

An additional special object is to provide a drill adapted to be actuated by a driving motor mounted direct-ly upon and forming a part of a. combined bearing and clcsure unit for the casing whereby removal of the said unit accomplishes both the disconnection 'of the'i'notor and a par- .tial `disassembling of the driving mechanism proper.

These and other objects of the invention will morefully appear when takenin con- `iunction with the following Vdescription and the appended claims. v

The preferred embodiment of the inven- Sei'ial N0. 664,673.

tion is illustrated in the accompanying drawings in which Fig. l is a vertical sectional view with parts in elevati-on; Fig. 2 a transverse sectional view withy partsin elevation, taken ron the line lll-Il ot Fig.

l; Fig. 3 a similar-view taken on the line lll-Ill of Fig. l; Fig. e a detail fragmentary view ot one of the impact ham mers, showing the method of assembling the several parts; F ig. 5 a detail view showing the split collar employed in connection with the impact hammer shown in' Fig. 4, said view being taken substantially onthe line vl-V of Fig. l; Fig. 6 a tragmentary detail view showing the form and method ot connection between the actuabing pitman or connecting rod used in conjunction with the impact hammers, said tigure being taken substantially on the line VI-Vl of Fig. l; Fig. 7 a detail view .of the drill bit used in conjunction with the drill rod; and Fig. 8 an elevational detail view taken on the plane indicated by the lines VlH-Vlll of Fig. l.

ln the embodiment illustrated, the guide traine 1. is provided with suitable means 2 for attaching it to a supporting standard 3. Mounted for sliding movement in the guiding slot 4l oi' frame l is alug 5 depending from the casing 5. The lug 5 is internally threaded, and cooperating therewith is a screw 7, journalled at one end in the frame l, and adapted to be rotated by means of hand crank 8. Extending inwardly from the frame l is a pair 'of oppositely disposed guiding ribs 9, 9', which engage suitably formed grooves in a pair of dependingv lugs 10, 10, respectively, formed upon the bottom of the casing (i.

The front end oi' the casing 6 is open, being closed by a closure plate 1l attached to the casing in any suitable manner as by the stud bolts 12. This closure plate is equipped with an inwardly `extending bearing sleeve 123. A similar bea-ring sleeve siderable distance from its inner end and is circular in cross section. Interposed between the drill rod 19 and the bearing sleeves 13 and 14 are theV respective bushings 22 and 23, the former being provided with the radially extending attached terminal flange 24 while the latter is likewise equipped with a similar terminal'flange 25 these terminal flanges facing each other and being spaced apart a slight distamie in which is disposed the worm wheel 25, said worm wheel being in abuttingrelation with the terminal flanges of the bushings whereby to be held against longitudinal movement. The worm wheel 26 is splined to the drill rod as indicatedat 27 so as to be operatively c engaged with the rod -while permitting free sliding movement thereupon.

Journalled -for sliding movement at the rear end of the casing G in any suitable bearing 28 is one end or' an impact rod 29, the opposite end of which slidingly tits within the bore 21 of' the drill rod, as clearly indicated in Fig. l, the drill rod, the bearing 28, and the impact rod 29 being arranged in longitudinal alignment. The rod 29 -is provided with an abutment 30 at a point adjacent the rear of' the casing, and with a peripheral groove 3l spaced Jfrom the said abutment.` Fitting within the groove is a split collar, preferably consisting or two parts 32, 32, each being provided with a reduced portion and a radially flanged portion forming a shoulder. The sections 32,

32 are adapted to be held in cooperative relation within the' groove 31 by means of a closed annulus encircling the reduced portions of the collar and abutting against the flanges. Operatively engaging with the impact rod at a point intermediate the abutment 30 and groove 31 is a pitman or connecting rod Set, the said pitman beingoperatively associated with the impact rod due to the passage of' the rod through an eyelet or opening 35 atone end thereof. Also threaded upon the rod 29 and abutting the opposite sides of the eyelet 35 are washers 36, 36', between which and the abutment 30 and the annulus 33 are disposed the respective compression springs 237, 37".

Mounted for free slidingl movement upon the rod 29 at a point adjacent the inner tremity of the drillrod is a reciprocating cylindrical sleeve 38, this sleeve being provided with a terminal flange 39 at one end, and with a peripheral groove #2O adjacent its opposite end. Fitting'within the groove e0 is a sectional collar consisting ot the sections 41, 4:1', constructed similarly to the collar sections 32, 32 and held in coopera.- tive relation with the groove by means ot an annulus 42, corresponding to the annulus 33. Likewise, engaging with the intermediate portion of sleeve 38 is the-eyeletor 'ture shaft, ask indicated in Fig. Q,

apertured extremity i.; of a connecting rod or pitman d. Abutting washers st, e5 are disposed at the opposite sides or the eyelet 4&3, and compression springs de, tt are interposed between these washers and the flange Sti andannulus 42, respectively.

The casing G at one side is provided with an opening -l7 o'considerable size which is adapted to be closed by a combined closure and bearing plate 8, the-bearing being indicated at et). yllhis plate inlay be attached to the casing in any desirable way, as by the stud bolts 5G, and has vintegrally Vformed therewith a motor supporting bracket the base 5l or' which lies Iin substantial alignment with `the bottom -ot the casina', as clearly shown in Fig. L3. n electric motor 52 is attached to the base 51 and has its armature shaft 'projecting within the bearing 49, the extremity ot the armature shat't. being non-circular in cross section, Vlor a purpose to be presently described. Disposed at the opposite side ot the casing and vin alignment with the bearing L19 is a bearing 53, which may also be 'formed in a. special bearing plate 5l attached to the' casing as at 55. ri crank shatt- 58 is mounted within the casing with its opposite extren'iities journalled in the bearings -lQ and 5:3. This crank shaft is equipped with two cranks 5T and 58, and has a worm 59 disposed at a point intermediate the said cranks, the worin 59'being adapted to operatively engage the worm wheel 26. rPhe extremity of the crank shaft located within the bearing 49 is provided with a recess GO corresponding in cross section to that ot the non-circular extremity 53 of the armature shaft ot' the motor, the said recess receiving the end oi the armawhen the parts are assembled inoperative relation.

rlhe end of the pitman or connecting rod o1, opposite the eyelet is operatively connected to the crank 58, while the corresponding end of the-pitman or connecting rod la is similarly connected to the crank 5T.

rEhe outer extremity of the drill rod 1i) is provided with a longitudinal cylindrical bore 61 Htending` inwardly from the biturcated extremity forming the oppositelj,v disposed jaws G2, 62. |The jaw G2 is cut away at 63, at a point spaced iironrthe end or the rod, whilethe jaw G2, is similarly cnt away at a corresponding point 63. A., drillbit 54 having` the cylindrical portion G5 equipped with the radially extending lugs (SS, 66 is adapted to be ei 1 d with the drill rod. In orderto connect the drill'bit, the portion G5 is inserted within the bore 61 with the lugs 6d 6G in aligi'iment with the space between the jaws GQ, 62. lVith lthe parts inthisfjpiosition, the bit may be forced longitudinally with respect to the drill rod until the lugs are broughtopposite the cut a vay portion 63, 63, at which time relative turning movement between the bit and drill .rodwill seat the lugs within the Cut away portion to the rear of the overhanging enlarged portions adjacent the eX- tremity ofthe drill rod.

In order to assemble the impact hammer comprising the reciprocating sleeve 38 and its associated parts, the spring 46 is first placed in position upon the sleeve, and the sleeve is in turn threaded through the washer 45, the eyelet 43, the Washer 45, the spring 46, and the annulus 42. The two sections 41, 41 are then placed into cooperative relation with the groove 40, the washer 42 during this time being forced to the position shown in Fig. 4 so as to compress the springs 46, 46. The annulus 42 is then permitted `to slide over the reduced portions of the split collar under the eXpansion of said springs, in an obvious manner, assuming the positions shown in Fig. l.

The parts indicated by the reference numerals 30 to 37 inclusive, which together with the impact rod 29 serves as an additional impact hammer, are assembled in a similar fashion. In other words, the several. springs, washers and eyelet, are first threaded upon the rod, the springs then compressed by forcing the annulusV 33 towards the abutment 30, inserting the sections 32,32 of the split collar, and subsequently permitting the annulus 33 to engage the collar for holding the same within the groove 31 under the expansion of the springs 37, 37.

Due to the provision of the opening at the front end of the casing and the mounting of the several parts including thel cylindrical bearings 13, 14, the bushings 22, 23, and their associated parts including the Worm wheel 26, the entire drill rod 29 together'with the aforesaid parts may be inserted through the open end of the casing as a unit, thus facilitating the assembling of the mechanism. l

Likewise due to the mounting of the driving motor 52 upon the combined closure plate and motor support, the crank shaft 56 may be readily inserted and connected with the 'connecting rods after which the placing of the closure plate in position will not only connect the motor to the gea-ring, but will bind the several parts into proper operative relation.

In operation, power is applied by means of the motor 52 to the crank shaft 56, which in turn not only rotates the drill rod 19, through means of the worm 59 and worm wheel 26,'but due to the connection afforded by the pitman or connecting rods 34, 44, the impact rod 29 forming a part of one of the impact hammers is reciprocated, as well as effecting similar actuation of the impact hammer the body of which is formed by means of the slidable sleeve 38.

During each rotation of the shaft 56, the

eXtreme inner end of the impact rod 29 is brought into striking relation with the bottom of the bore within the drill rod, andA the flanged portion 39 of sleeve 38 is likewise brought into striking relation vwith the inner iianged extremity 20 of the drill rod. Such mode of operation thus secures two impacts upon thedrill rod during each revolution of the shaft 56, such impacts being successively caused by ythe alternate striking of the impact rod 29 with the bottom of the bore 2l and by similar action of the flanged portion 39 with the inner end of the rod. The striking impulses thus produced cause a reciprocation of the drill rod 19 in an obvious fashion, the said rod being free to move longitudinally with respect to its bearings and its driving wheel due to the splined connection 27.

It is obvious that the striking impacts thus produced with the part-s proportioned in the manner illustrated in the drawings, is merely momentary, the compression springs employed in connection with the impact hammers permitting sliding movement of the eyelet 35 or 43, as the case may be, after the impact has been made due to the contact between the hammers and the drill rod.

As illustrated, viewing the partsas shown in Fig. 1, the crank shaft 56 is rotating in an anti-clockwise direction, and is kthus bringing the iianged portion 39 4intofcontact with the terminal flange 2O of the drill rod in order to deliver a. blo-w, while the inner extremity of the impact rod 29 is just about to be retracted from the bottom of the bore in the said rod. It is also noted that all of the impacts from both hammers are in the same direction and are effective for moving the drill bit into ythe material operated upon. Y n

, During operation of the drill, the drill bit is constantly forced into intimate contact with thel material being operated upon in the customary and well known manner. As the bit cuts away the material operated upon the casing 6, together with its att-ached parts is gradually moved towards the same by turning of the crank 8 and the feed screw rod 7.

Pressure of the bit upon the work oonstantly forces the drill rod 19 to move towards the left, as viewed in Fig. 1, with the result that the drill rod may be brought to the most vdesirable position for receiving the impact from the hammers under varying operating conditions, the' compression springs of the hammers not only permitting the drill bit to assume various relative positions under variationsof pressure thereon, but serving as a cushioning means to prevent undue strains upon the several parts.

It is thus seen that the invention provides a rotar 7-reciprocating drill which is simple, sturdy, durable and efficient in operation,

Cil

-iinwliich theV several mechanisms compris ing the saine mayv be readily assembled and disassembled,l either singly or collectively asv units, in which repeated successive impacts'arefdelivered to: tlie drill rod by a plurality otimpact. hammers all of which are arranged `in longitudinal alignment ivitli the drill rod, Ein lwhich :the impact hammers are ofunique constructionand operatively associated-With the parts to be operated up'- on in a novel fashion.

I claim:

l. Afdrillcomprising a casing, a` drill rod mounted'theieon, a pair ot' movableiimpact hammers adapted to strike the said rod, the.

said hammers being` permanently disposed in longitudinal-f alignment with-the drill rod, and means having movement in a single plane Jfor reciprocating the hammers.`

2. A drill 'comprising a casing, a drill rod mountedwtliereon, an impact rod telescopically engaging the drill rod, an impact hammer'slidingly mounted on the impact rod adjacent the inner extremity of tliedrill rrod,'rand means for reciprocating both said hammer and impact iod.l

3. A. diillcoinprising a casing,- a drill rod mounted thereon, an impact rod forming a part 'oan impact hammer telescopically engaging the drill rod andf- @disposed -in longitudinal alignment therewith, a second iinpact'hanimer slidable onl the `impact rod adjacent the inner extremity of the drill rodgland mea-ns for successively bringing` the 'said impact `rod and'saidi'second named hammerinto ystrikingcontact with the drill rod.

4f.' A drill comprising a casing, a drill rod mounted 'thereon provided ivitli a hollow bore, an impact rod forming a part of a hammer slidingly fitting within the bore, a bodily inovablev-in'ipact'hammer :slidingly mounted upon theimpact rod adjacent the inner extremity of the drill rod, and means for successively bringing the impact rod and said bodily movable Vhammer 'into striking relation with thel bottoni-ot the said borey and inner extremity of the drill rod respectively.

5. A drill comprising a casing, a drill rod mounted thereon provided With ra hollow bore, an impact rod forming a part of a hammer slidingly fitting Within the bore, a bodily reciprocating sleeve sli'diii'igly mountedvon 'the Vimpact rod adj acentthe inner extremity 'of rthe drill rod and adapted to strikingly engage the drill rod', said sleeve liavlnga terminal iiange at one end and a i. peripheral groove adjacent the other, a split collar ittingthe said groove and-having radially extending flanged portions providing a rshoulder, an annulus encircling the said collar whereby to' retain the sanic in cooperative relation yWith the groove, a pitman-slidingly but. operatively engagingthe intermediate portion ot' the sleeve, compression-springs interposed between the said pitii'ian..=and the AsaidV terminaly flange land aiiniiliis,-aiid means `tor actuating the said pitman and the said impact-rod.

6.In combination in a drill, a reciprocating impact rod, means tor/reciprocating Said rod iiicludingan eyelet through ivliich the said rod passes, a iixedabutnient. disposed at=one side of the eyelet and spaced therefrom, a spring'interposed between the eyelet andr saidj abutment,y said rod being prcvidedvavitli anannular groove spaced from the eyelet land located at tlieside thereof opposite the: abutment, a split annnlus Iittingxvitliin the saidfgroovc andA positively held: against.longitudinal movement .ivith'` respecti to .the said rod,;the'2sections ot -thev annulus having reduced .portionsvtlius providing an annular shoulder,` a Aringtelelableendclosure plate for theY fcasing,pro-` -vided With .an inwardly extending bearing sleeve, a similari .bearing y'sleeve areinovably supported "Within the casing and spaced 'from the Vtirst namedsleeve,` a rotary-reciprocat- -ing drill ro'd. mounted` in'said sleeves, a pair of cylindrical bushings provided `with radial terminal fflanges, the ,terminal` flange on `one fof said1bushings being removably attached thereto, the said bushings being interposed Abetween therespective sleeves and rod and having said Viianges facingeach other .and iii'abutting relation with the said sleeves, a gear encircling tlie rod and-lield against longitudinal movement by the said'flanges` said gear operatively engaging-.the rod but inounteddor tree sliding movement thereupon, all-ofsaid parts being removable from the casing as a unit.

In testimony whereof, I sign my name. ROBERT BINNIE. litnesses FRANK R. HAMMOND, RUTH MoHAin.

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