US1554060A - Spindle-adjusting mechanism for drilling machines - Google Patents

Description

Sqn, 15, 192s.

` J. T. WRIGHT SPINDLE ADJUSTING MECHANISM FOR, DRILLING IACHINBS Filed Feb. 21. 1924 lwm@ Patented Sept. l5, 1925.

UNITED J. IPANY, F CINCINNAT, OHIO. A. CORPORATIQN OF OHO.

SPINDLE-ADJUSTING MECHANISJNI FOR lDEtLiIhTGfv IlLACHINES.

Application filed February 21, 1924:, Serial No. 694,20?.

for adjustably setting),l the drill spindle,l and speciiically to a type of drillingl machine as disclosed in prior application tiled by nie August 2li, 1922, Serial lNo. SQEJlQ-patented May G, 1924, :tt-1,493,457. v

The object ot my invention is lthe provision ot an imj roved means for microlnetrically translating` tor adjustably `positioning the drill spindle and locking the same in its adjusted position7 which setting cannot be disturbed by any vertical thrusts upon the rotative drill spindle.

@ther objects and certan advantages will be disclosed in a description oi' the drawings 1to1-ming` a part ot this application, and in said drawings: f

Figure l is a side elevation.

Figure 2 is a section on line 2 2 ot Figure l.

Figure is a detail view ot the spindle adjusting,l and locking mechanism.

Figure l is a section taken on line 4.- lligure 3.

l contemplate the use of my invention upon a drillinpl unit of such site and dimensions that a plurality of these drilling,l units may be mounted upon a rail and driven by a power shaft parallel to said rail. The worh is ted to the drillingl units by a movable table (not shown). The drilling unit comprises a spindle l journaled in a 'trame 2. 'this trame provides -two spaced bearings 3 and d. rlhe :trame is attached to the rail 5 by a dove-tail connection. @ne

doveetail element. 6 on the trame is fixed.V

The second dove-tail element 7 as a gib is se4 cured in position by a rod 8 loosely traversing' said 'trame and having` a winged nut 9 upon its opposite end. Thus the unit may be moved upon the rail and clamped thereto at any desired point by tightening` the winged nut 9. The frame 2 is provided with a casing` portion l0 above the bearing 3 provided with a removable cover plate ll which is secured by a plurality ot bolts l2.

Passing through this casing portion is a power shaft 13. Splined to said power shaft is a bevel gear le. ln mesh with the bevel gear le is another bevel gear which is splined to the spindle l.

Attached to the frame just below the bearing` a, by a bolt i6 is a cutting discharge spout l?. The spindle l is provided with a passage 18 connecting the interior ot said discharge spout l? with the interior ot the hollow drill 19 which is n'iounted in the end ot the spindle l.

Ayoked pressure toot 20 spans said drillV and 1s attached by a bolt 2l toa pressure :toot rod 22. The pressure. toot rod is mounted in a bracket 23 which is scour-d to the frame 2l on'the side opposed to the rail. @oiled about that portion ot the pressure foot rod within the bracllzet is a co1npression spring 2li.' The tensionof this spring can be regulated by means ot collar 25 adjustably secured to the pressure Vtoot rod.

Between the bearings 2l and t is located my means ot inicrometriyl y adjustin v spindle and locking the sa` vin adjusteffl position. The adjus by providing the sp .le with a eaded portion having'a nut encased thereon l' f` ent is accomplished ment with the split collar the adjustment.

nut can be rotated and the spindle translated. By moving the lock collar back into toothed engagement with the split collar the lock is accomplished. The collar is also adapted to move by gravity into coupling with the split collar when released by the operator.

Adjacent bearing 3 is an end thrust bearing comprising, washers 26, 2T, between which are a plurality ot balls 28. Adjacent this end thrust bearing` is a split collar 29 rotatably secured to the spindle l by a screw 30. Thus the split collar 29 is splined to the spindle to rotate therewith but is free to be Vnioved upon the spindle axially. Adjacent the bearing` 4 is a washer 3l and ad- CTL jacent said washer 31- is anot-her split collar 32 splined to the spindle 1 by means of a screw 33. Between said split collars is an adjustment nut 34- threaded upon a screwthread portion 35 of the spindle.

This adjustment nut 34 is held secure from axial motion by means of the split collar .29 and the end thrust bearing disposed between it and bearing 3 and by the split collar 32 and washer 31 disposed between it and bearing 4. In order to rkeep said adj ustment nut from being rotated independently of the spindle except for purposes of adjustment, I provide a lock clutch nonliirictienal in its nature. Splined to said adjustment nut is a knurled lock collar 36, provided at one end with teeth 37 which fit into notches 38 in one of the split collars, in this case 3Q. By moving said knurled lock collar axially until the teeth 37 are clear of the notches 3S and rotating said adjustment collar the spindle can be micrometrieally translated and adjusted to compensate for tool wear. I provide four teeth and notches so that every 90 the adjustment collar can be seated and a lock between the adjustment nut and the split collar which rotates with the spindle is thereby accomplished.

Having described my invention, I claim:

1 A drill head, a spindle having a threaded portion rotatively and translatively journaled in said head, an adjustment nut held securely against axial motion engaging said threaded portion of the spindle for translating the same, and a lock collar about said adjustment nut normally securing said nut rotatively with thespindle but disengageable for spindle adjustment.

2. A drill head, a spindle having a threaded portion rotatively and translatively journaled in said head, an adjustment nut held securely against axial motion engaging said threaded portion of the spindle for translating the same, and a lock collar splined to the adjustment nut normally having toothed engagement with an element rotatively connected with the spindle but disengageable therefrom for spindle adjustment.

3. A drill head providing spaced bearings, a spindle rotatively and translatively mounted in said bearings, said spindle having a threaded portion between said bearings, an adjustment nut about said threaded portion, split collars on either side of said adjust- .ment nut, an end thrust bearing between one of said split collars and one bearing, said split collars and end thrust bearing holding the adjustment nut from axial motion, a lock collar splined to said adjustment nut providing non-frictional engagement 'with one yof said split collars.

4. A drill head providing spaced bearings, a spindle rotatively and translatively journaled in said bearings, saidk spindle having a threaded portion between said bearings, an adjustment nut about said threaded portion secured against axial motion between said bearings, a collar splined tosaid spindle adjacent said adjustment nut, and a loclr collar splined to said adjustment nut engageable with said collar splined to the spindle.

5. A drill head providing spaced bearings, a spindle rotatively and translatively journaled in said bearings, said spindle having a threaded portion between said bearings, an adjustment nut about Said threaded portion secured against axial motion between said bearings, a collar splined to said spindle adjacent said adjustment nut, a lock collar splined to saidadjustment nut, and teeth providing engagement between said lock collar and said collar rotating with the spindle.

6. A drill head, a spindle relatively rotatably and translatably disposed in said head having a portion thereof threaded, an adjustment nut engaged upon the threaded portion of said spindle for translatingsaid spindle, a collar adjacent one side of said nut and splined to said spindle, and a movable collar splined to said nut, having a toothed connection with said first collar connecting said parts. Y

In witness whereof, I hereunto subscribe my name.

JOSEPH T. WRIGHT.

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