US1143373A - Milling-machine spindle-saddle. - Google Patents

Description

E. FELDMANN. MILLING MACHINE SPINDLE SADDLE. APPLICATION r|Ln1uNE8.l914`.

1,143,373. Patented .111110 15, 1915.

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E. FELDNIANN.

MILLING MACHINE SPINDLE SADDLE.

APPLICATION FILED JUNE 8,1914. 1,143,373. Patented June 15, 1915.

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ERNST FELDMANN, OF ROCKFORD, ILLINOIS, ASSIGNOR TO THE INGERSOLL MILLING MACHINE CO., OF ROCKFORD, ILLINOIS, A CORPORATION OF ILLINOIS.

`MILLIN'G-lVlACI-IINE SPINDLE-SADDLE.

Specification of Letters Patent.

Patented June 15;, 1915.

Application filed. June 8, 1,914; Serial No; 843,876.

To all whom it may concern Be it known that I, ERNST FELDMANN, 'a citizen of Germany, residing at Rockford, in the county'of lVinnebago and State of Illinois, have invented certain new and use#V ful Improvements in Milling-hIachine Spindle-Saddles, `of which the following is a specification. Y

rThis invention relates in general to milling machines and has more particular reference to the saddle and the spindle-supporting and driving mechanism of what is commonly termed a face plate milling machine. Y

In order to insure smooth and perfect work and to prevent vibration and chattering orf the tools it is essential in machines of'this character that the tool-spindle be mounted and held with the utmost rigidity.

`With this end in view one of the primary objects of my invention is the provision of novel means for mounting the spindle so` that it can be adjusted longitudinally to suit the requirements of the work and which will hold the spindle rigidly and -inleXibly in working position. Y

Another Vobject is the provision of improved driving means which will drive the spindle vat the toolend, thereby obviating any vibration or irregularity in the oper-V ation of the'tool which might result from torsional strains on the spindle if it were driven from the end opposite to that on which the tool is mounted..V

A further object is the provision of means for rigidly and unyieldingly connecting the projecting ends of the spindle sleeve and pinion shaft sleeve so that vibration of the sleeves will be obviated and so that thc sleeves will move together as a unitary structure during their longitudinal Aadjusting movements.

A still further object is the provision of simple and e'liicient means for locking the spindle and pinion shaft against longitudinal movement after they have been adjusted ing my invention; Fig. 2 is a longitudinal sectional view takenv on the line 2-2 of Fig. l; Fig. 3' is an end elevation looking toward the left inFig. l; Figs. 4 and 5 are -sectional views taken on the lines 4% and 3*5 of Fig. 1; Fig. 6 is a plan view of the construction shown in Fig. l; Fig. 7 is an end elevation looking toward the right in Figs. l and 6, a portion of the casing being broken away to show the underlying gears; Fig. 8 is a sectional view on the line 8 8 of Fig. 6, and Fig. 9 is a transverse sectional view onthe line 9-9 of Fig. l.

Referring to the drawings, reference character l1 designates a portion of the main frame of the milling machine which is formed to provide a track or guideway upon which the spindle saddle 12 may be adjusted. The saddle may be retained in adjusted position by any suitable holding means, one practical form being illustrated in the drawings as comprising overlying lips 13 carried by the saddle and adapted to be clamped against an opposed face of the main frame guideway by means of clamping bolts 14.

.lfhile the guideway is illustrated on the drawings as being vertically disposed so that the tool carrying spindle in the saddle is arranged horizontally it will be manifest that the track may be horizontal and the spindle disposed vertically without' departing from the essence of my present invention.

The spindle saddle 12 is cored longitudinally to provide a pair of parallel bores 15 and 16 in which the tool spindle 17 and the pinion shaft 18 are mounted in a manner to be later described.

lVithin the bore 15 is snugly fitted the spindle sleeve 19 which is capable of longitudinal adjust-ment within the bore but has a machined contactfit so that vibration of the sleeve in the saddle is precluded.

rlhe spindle 17 is ournaled in the sleeve 19 and a bushing 21 is interposed between the spindle and the sleeve, the endof the bushing being flanged radially over the end of the sleeve as shown in Fig. 8, and the sleeve having an annular shoulder 22 against which the inner end of bushing 21 abuts.

A' second bushing 23 is disposed within the contracted portion of the sleeve 19 around the spindle 17, and a lock nut 2a threaded onto the spindle at the inner end 'los of the sleeve serves to prevent outward movement of the spindle with respect to the sleeve, suitable washers or bearing rings 25 being interposed between the lock nut 24 and an annular' shoulder 26 formed at the inner end of the sleeve.

The outer end of the spindle is equipped with a gear wheel 27 which may berigidly secured to the spindle in any approved manner, the gear beingpishown in the present instance as formed integral with the spindle. It will be manifest that the inner face of the gear 27 together with the lock nut 24 precludes longitudinal movement of the spindle with respect to the sleeve.

In order to obviate any lateral movement of the spindle the saddle is formed at the rear of the bore 15 with a supplemental bearingQS, preferably equipped with a. suitable bushing 29 in which the spindle rotates, andis capable of longitudinal adjustment.

The outer face of the gear 27 forms the face plate to which the cutting tool is attached, this'face being preferably provided with suitably tapped sockets 31 into which the tool fastening bolts are threaded. The

Vpresent machine is primarily designed for very heavy work in which face plate tools are employed, but it will bemanifest that smaller tools may be used vif desired b v mounting` the tool in the centrally disposed socket 82 of the spindle.

instead of driving the spindle from its inner end, as has been the practice to a large extent heretofore, I contemplate the provision of driving mechanism including a pinion which will mesh with the gear 27 at the tool end of the spindle. This manner of driving obviates torsional strains on the tool spindle, thereby eliminating the tendency of the spindle to chatter in its bearings, which causes rough and uneven work. The spindle is, in the present instance, therefore driven from a pinion 33 constructed integral with or fixedly attached to the outer end of the pinion shaftv 18 rotatably mounted in a sleeve 34 fitted into lthe bore 18, suitable bushings 35 being preferably interposed between the shaft and the surrounding sleeve. Longitudinal movement of the shaft relatively to the sleeve 34 is prevented by the inner face of the pinion 33 and a lock nut Y 36 pinned, or otherwise fixed, upon the shaft at the inner end of the sleeve. The spindle shaft is driven from the main drive shaft 87 through a pair of intermeshing beveled gears 38 and 39, the gear 39 having a splined connection with the spindle shaft to permit longitudinal. adjustment of said shaft, and the 88 being splined on the shaft 37 to permit adjustment of the saddle on the main frame without disturbing the driving connection between the drive shaft 37 and the gear.

From Fig. 4it will be observed that the -the sleeve, suitable bushings 45 and washers 46 being employed to take up the wear.

For the purpose of adjusting the spindle longitudinally to suit the requirements of the work I have equipped one face of the sleeve 19 with rack teeth 46 (Figs. 2, S and 9) and havemounted in the saddle an ,ad justing spindle lor shaft 47 equipped at its inner end with a pinion 48 which meshes with the rack. The outer end of the spindle 47` is squared, as indicated at 49, to receive the handle or operating lever by means of which the shaft 47 may be rotated to longitudinally adjust the tool spindle. 1t should be understood that 1 do not desire to limit my invention to this particular means of adjustment since other mechanisms for moving the sleeve 19 longitudinally will readily suggest themselves to those skilled in the art.

Since the sleeves 19 and 34, in which the tool spindle 17 and the pinion shaft 18 are respectively mounted, project outwardly some little distance beyond the face of the saddle it will be obvious that when the tool is doing very heavy work the enormous lateral pressure exerted upon the tool will tend to spring and distortthe sleeve 19. For the purpose of backing up the 'sleeve and over coming any tendency of the same to yield or distortunder heavy work and also for the purpose of holding the pinion 33 in proper driving engagement with the gear i7 and, furthermore, to'insure the simultaneous and unitary longitudinal movement of both sleeves 19 and B4 lwhen longitudinal adjustment of the spindle is required, 1 have rigidly connected the extremities Vof the sleeves 419 and 34 bymeans of a heavy substantial member 51 snugly fitted upon the ends of the sleeves and preferably formed in the shape of a housing, as shown, to sur-,-

the intermeshing and unyielding connection between theV rac sleeves, and with this end in view I have tapped the housing and each sleeve to rev ceive the set-'screws 52 and 58as shown in Figs. 8 and 1 respectively. It will thus be manifest that this housing serves to cover the rear face and the periphery of the pinion and gear 27 s0 as to protect the operator against possible injury as well as serving as a rigid and inflexible connectionbetween the ends of the sleeves which will absolutely pre- Tes clude relative movement between the sleeves either laterally or longitudinally.

InY order' to protect the operative against becoming entangled in the pinion or gear wheel from the outer face I prefer to employ an outer plate 54 Vwhich completely covers the end of the pinion and also the gear teeth on gear 27, the gear 27 being provided with a peripheral groove 55 to receive the plate 54 which lies back of the face of the gear on which the cutting tool is mounted. The gear is thereby wholly inclosed while the outer face of the gear 27, usually termed the face plate, is left exposed for the attachment of the tool. Y

For the purpose of providing a simple, cheap and eficient means for locking the spindles 19 and 34 in any position to which they may have been adjusted longitudinally I have provided the saddle 12 with intersecting longitudinal and transverse slots 56 and 57 formed in one wall of the bore 15 so as to provide a yielding portion 58 of the wall which may be tightly clamped about the sleeve 19 by means of clamping bolts 59. Similarly the wall of the bore 16 is provided with intersecting longitudinal and transverse slots 51 and 62 respectively, forming the yielding portion 63 which may be clamped around the sleeve 34 to lock the same in adjusted position by means of the clamping bolts 64. When it is desirable to adjust the spindle longitudinally the bolts 59 and 64C are loosened so as to permit the required longitudinal adjustment of the sleeves 19 and Sil to be made, whereupon these bolts are again tightened up to securely and fixedly clamp the sleeves in the position to which they have been adjusted. It will be obvious that since the spindle sleeve and the pinion shaft sleeve are rigidly connected together by the housing 51 it is only necessary to provide adjusting mechanism for one of these sleeves, any adjusting movement of one sleeve being transmitted to the other through the housing.

It will be understood from the foregoing that I have provided a saddle in which the tool spindle is firmly and unyieldingly mounted, in which the spindle is driven at the tool end so that all torsional strains upon the spindle are obviated, that the spindle and pinion shaft are rigidly connected, thereby precluding vibration or chattering of the spindle and insuring equal longitudinal movements of both members when adjustment is required, that the spindle driving gear is completely inclosed in protected casing, and that a simple but highly eflicient means for locking the spindle in adjusted position is provided in the body of the saddle itself.

While I have shown and described a preferred embodiment of the invention I do not desire to limit myself to the specific embodinaled respectively in said sleeves, a driving connection between said spindle and shaft, and means for rigidly connecting the projecting ends of said sleeves.

2. In a milling machine the combination of a saddle, a plurality of sleeves mounted therein and projecting beyond the end of the saddle, a spindle journaled in one of said sleeves, a pinion shaft journaled in the other sleeve, a driving connection between said spindle and shaft, means rigidly connecting the projecting ends of said sleeves, and means for adjusting), said sleeves longitudinally in the saddle.

3. In a milling machine the combination of a saddle, a pair of sleeves longitudinally Vadjustable in said saddle, one end of each sleeve projecting beyond the end of the saddle, a pinion shaft and a spindle journaled respectively in said sleeves, means whereby the projecting ends of said sleeves are rigidly connected together, and intermeshing gears carried by the outer ends of said pinion shaft and said spindle whereby the spindle is driven from said shaft.

4, In a milling machine, the combination of a saddle, a pair of longitudinally adjustable sleeves mounted in said saddle, a pinion shaft journaled in one of said sleeves and provided at its outer extremity with a pinion, a spindle journaled in the other sleeve and provided at its outer extremity with a gear-wheel meshing with said pinion, and a housing disposed over said pinion and said gear, said housing being iixedly secured to each of said sleeves whereby the sleeves are rigidly connected together.

5. In a milling machine, the combination of a saddle, a spindle sleeve carried thereby with one end projecting outside the saddle, a pinion sleeve also carried by the saddle and having one end projecting outside the saddle, a pinion shaft journaled in said pinion sleeve, a spindle journaled in said spindle sleeve, driving means at the outer ends of said spindle and pinion shaft whereby the spindle is driven from the pinion shaft, means whereby the outer ends of said sleeves are rigidly connected together, and means for adjusting said sleeves together longitudinally in the saddle.

6. In a milling machine, the combination of a saddle, a pair of sleeves longitudinally adjustable in said saddle, a spindle journaled in one of said sleeves, means for preventing longitudinal movement of the spin-V dle relatively to the sleeve,'a pinion shaft journaled in the other sleeve, means for preventing longitudinal movement of said pinion shaft relatively to said sleeve, inter; meshing gears carried by the outer ends of said shaft and spindle whereby the spindle is driven from said shaft, and a housing inclosing said gears, said housing being rig-V idly attached to each of said sleeves 'Whereby said sleeves are rigidly Aconnected together at their outer ends.

7. ln a milling machine, the combination of a saddle, a pair of sleeves slidably mounted in parallel relation in said saddle with their ends projecting beyond the saddle, a spindle journaled in one oi said sleeves and provided at its outer end with a gear Wheel, a pinion shaft journaled in the other sleeve and provided at its outer end with a pinion meshing with said gear Wheel, means for rigidly connecting the outer ends of said sleeves together, means for .simultaneously adjusting said sleeves longitudinally in the saddle, means for preventing longitudinal movement of the shaft and spindle relatively to the sleeves, and driving mechanism splined to said pinion shaft through Which power is applied to said spindle. Y

S. In a milling machine, the combination oi' a saddle provided Witha plurality of bores, a sleeve slidably disposed in each of said bores, means for adjusting said sleeves longitudinally of the bores, the Walls of said bores being slotted to provide yielding clamping portions, and means for clamping said yielding portions around the sleeves to lock the sleeves in adjusted position.

9. In a milling machine, theV combination of a saddle,a plurality of sleeves mounted axially movable therein with their corresponding ends projecting beyond the saddle, a member rotatably mounted in each sleeve, a driving connection between said rotary members, and means rigidly connecting said projecting ends of the sleeves.

JOHN F. MCCANNA, J. R. JOHNSON.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents.

Washington, D. C. i

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