US1213306A - Track-drill. - Google Patents

Description

E. W. VOGEL.

TRACK DRILL.

APPLICATION FILED JUNE 15. 1914.

1,21 3,306. Patented Jan. 23, 1917.

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E. W. VOGEL.

TRACK DRILL. APPLICATION HLED JUNE 15, 19M- 1,213,306, Patented Jan. 23, 1917.

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Y WENTO I I By M UNITED STATES r OFFICE.

EUGENE W. VOGEL, 0F OAK PAR-K, ILLINOIS, ASSIGNOR TO CHICAGO RAILWAY SIGNAL ILLINOIS.

conronarron or TRACK-DRILL.

Specification of Letters Patent.

Patented Jan. 23, 1917.

Application filed June 15, 1914. Serial No. 845,280.

The invention contemplates a track drill in which the bit may be brought up rapidly to the work. advanced at a slow speed during the drilling operation and withdrawn therefrom at a high speed, and the invention has for one of its objects to provide certain improvements and arrangements in a machine of this type whereby the changes in speed are effected by a foot lever or trea die so that the hands of the operator are free to manipulate the crank and to steady or support the machine. L

It will be understood that track drills are frequently used for drilling a rail for1n ing part of the railroad track in service so that it is essential that the movements of the drill should be as rapid as possible, particularly that. .the tool should be capable of being rapidly withdrawn from the work without danger of breaking or bending it on the approach of a train. lVith the arrangements of my invention the several. necessary operations are capable of being performed very expeditiously.

A further object is to provide an arrange ment whereby the bit or drilling tool may be brought up against the web of the rail and the drilling operation effected without reversing the operating crank. to the end that the withdrawal of the drill at high speed may be accomplished by simply re versing the crank and operating a speed changing device which. by preference, as above stated. is controlled by the foot of the operator. The movements of the crank in advancing the drill to the work and in drilling, that is. the turning of the crank down from right to left and up from left to right when the drill is to be advanced, either at the high speed to the work or slowly in the drilling ope ation, and the reverse movement of the crank when the drill is to be witndrawn from the work,

are movements which a workman familiar with hand operated machine tools would be likely to perform naturally. For this reason the machine is more expeditiously handled than one in which the movements of the crank in regard to the corresponding movements of the drill are not the expected and habitual movements.

lVith respect to details of construction the invention has for further objects to provide a track drill which will be inexpensive to manufacture, strong and durable, and simple in its mechanism so. as not to be likely to get out of order.

A further object is to completely inclose the operative mechanism requiring oiling in an oil-tight housing which may be kept filled with a lubricant.

The invention is illustrated, in a prefer-red embodiment, in the accompanying drawings wherein 7 Figure 1 is a side elevation of the machine shown as applied to a railroad rail, Fig. 2, a sectional elevation of the machine at right angles to the plane of Fig. 1,.lookingiin the direction away from the drill;

Fig. a sectional plan through the upper I part of the housing showing the countershaft and its gears for driving the drill spindle, this figure being a sectional plan taken on line 3-3 of Fig. l showing the clutch in the position indicated by the dotted lines in Fig. 4; Fig. 4, an enlarged sectional view on line 4[4iof Fig. 2; Fig. 5, a sectional view on line 55 of Fig. l; Fig. 6, a detail view of the clutch side of the loose gear on the counter-shaft; Fig. 7, a similar view showing the face of the clutch member which engages the gear shown in Fig. 6; Fig. 8, an enlarged sectional plan taken on line S S of Fig. l, and Fig. 9, a fragmentary sectional elevation to show particularly the foot lever by means of which the speed changing mechanism is controlled.

Like characters of reference designate like parts in the several figures of the drawings.

In the drawings, 10 designates a railroad rail supported on a cross tie 11.

12 designates a bit or drilling tool fitted into the chuck 13 of the drilling spindle 14L of the machine. The spindle is driven by a suitable direct driving connection consisting, in the preferred form of the invention shown in the drawings, of a driving shaft 15 having a crank 16, a sprocket wheel 17 on shaft 15, a sprocket wheel 18 on the spindle, and a link belt 19 connecting the sprockets 17 and 18. The mechanism for reducing the speed at which the spindle is advanced during the drilling operation is inclosed in a three- part housing 20, 21, 22, the housing members 20, 21, being secured together by screws 23 and the housing member 22 which incloses the inner or threaded end 21 of the spindle being threaded onto a boss 25 formed on member 21.

The several operative parts of the machine are supported upon a framework consisting of uprights :26 secured to obliquely disposed frame members 27 which are pivoted at their lower extremities to the foot piece 28 and are provided at the other extremities with rail clamps 29 for engagement with the head of a rail, as shown in Fig. 1, and a hand grip member 30 adjustably secured between the uprights 26 by bolts 31. The shaft 15 is journaled in the member 30. The casing member '21 is supported on angle blocks 32 on the lower extremities of the up rights 26.

I lay no claim to the general construction of the supporting frame or to the construction of the rail engaging clamp, these being the inventions of Frederick L. Rainbow and disclosed in the application filed by the lat ter February 2, 1914-, Serial No. 816,058. I have, however, improved upon the framework of the machine by making the foot piece 28 separable from the rest of the ma chine so as to facilitate the packing and transportation of the machine. The lower extremities of the frame members 27 are,v to this end, provided with bolts 33 which pro ject into perforations in angle plates riveted to the foot piece. The engagement is made secure by a spring clip 35 riveted to the foot piece with its other extremity hearing against one of the frame members 27. To remove the foot piece the spring clip 35 is pressed down so as to clear the frame member against which it normally bears.

The speed at which the drill spindle is ad vanced during the drilling operation is reduced by the following mechanism: The spindle 14: is formed with a key-way 36 into which projects a key 37 on a gear wheel 38 mounted on the hub 39 of sprocket wheel 18. The extremity of the hub 39 is threaded for a jam-nut 40 which serves to hold the gear wheel 38 in rigid relation with the sprocket wheel and its hub. Revolubly mounted in the upper casing member 20 is a countershaft tl provided with a loose running gear wheel 42 (Fig. 6) formed with a clutch face 48 and a fast gear wheel +14. The gear wheel 42 meshes with the gear 38' on the spindle 14 and the gear a l meshes with the gear teeth of a feed nut e5 engaging the threaded end 24:. of the spindle. The thread of the spindle is preferably a right thread. A thrust bearing 46 is interposed between the gear wheel and the boss 25 of the casing member 21. The feed nut 15 has a hub ell to the end ofavhich is secured a collar #8 bearing against the outer end of the boss a stop disk 19 which limits the forward movement of the spindle. Splined on the countershaft ll is a clutch member 50 (Fig. 7) which normally stands in engagement with the clutch face of the loose gear 12. The clutch is moved from its normal position, shown by the full lines in Fig. 4. to the position shown in the dotted lines in that figure. in which position the gear 19. runs free on the countershaft. by a yoke 51 engaging pins on blocks 53 in the slot 51 of the clutch member. the yoke being rigidly connected to a short shaft mounted in the upper part of casing '20, extending through the same and provided outside the casing with a crank 56 which is formed with a slot 57 for engagement with a pin 58 on the end of a. foot lever 59 pivoted to one of the uprights 26. .1 leaf spring 0 is secured to they under side of the lever and bears upon one of the frame members 27. The upper casing member 20 is provided with an oil cup 61 which is closed by a cap 62. The clutch member 50 is formed with a projecting lug 63 and the casing member 20 with a stop lug ()l which stands in the path of the lug fii'l wheu the clutch member 1s dlsenfrom the gear wheel The operation of the maclnne above described is as follows: The machine is set up near the rail to be operated upon and the clamp 29 engaged with the head of such rail. The hinged relation between the foot plate 28 and the rest of the machine allows the ma chine to be firmly positioned even when the tie or other surface on whichthe device is set is uneven. The gears 38, 4:2, i and the feed nut -15 are proportioned so that when the feed nut is driven through the gears on the countershaft it revolves at a speed a trifle less than the speed of rotation 1mparted to the spindle through the direct driving connection operated by crank 16. To bring the drilling tool up to the web of the rail the operator presses down with one foot upon the treadle 59, grasps the hand grip 30 with his left hand and turns the crank under fron'i right to left and over from left to right. This revolves the spindle in the direction indicated by the full feathered arrows in Figs. 1 and 4c. The clutch member 50 stands disengaged from the gear wheel 42 so that the gear wheel runs free on the counter-shaft and the feed nut 45 is not driven. The feed nut is prevented from revolving with the spindle by the engagement between the stop lugs 63,

The end of the spindle is provided with 6%. Therefore therotation of the spindle moves it forward with comparative rapidity, the threaded end screwing out of the stationary feed nut 45. lVhen the drill has reached the web of the rail the operator takes his foot oif the treadle and keeps on turning the crank in the same dir ction. W hen the treadle is released. its spring 60 forces it up rocking the yoke 51 to engage clutch member 50 with the gear wheel 42. This transmits motion from the spindle through gear 38, and the gears 42, sit on the countershaft to the feed nut 45, revolving it in the same direction as the spindle but at a velocity a trifle less than that of the spindle. As a result the spindle is fed forward at a relatively slow speed. lVhen the hole has been bored or if it be necessary to remove the machine from the track on the approach of a train, the operator reverses the movement of the crank 16 which reverses the direction of rotation of the drill spindle, driving it in the direction shown by the semi-feathered arrows in Figs. 1 and 4. At the same time he presses down with his foot upon the treadle 59 so as to throw out the clutch and disengage the feed nut drive. The feed nut is held from revolving with the spindle by stop lugs 63, 6%, as above described, and therefore the spindle is drawn back at relatively high speed, the threaded end of the spindle screwing backwardly throughthe feed nut.

The housing 20, 21, completely incloses the threaded end of the spindle, the feed nut and the feed nut driving mechanism forming an oil-tight casing which may be filled with a lubricant. The smooth end of the spindle projects out of the casing. The length of this end of the spindle beyond the threading is proportioned so that the threaded portion is not exposed beyond the casing. Hence there will be no escape of oil, around the spindle.

\Vhen the machine is transported the foot piece 28 may be removed by pressing down the retaining spring 35 and releasing the pins 33 on the frame members 37 from the angle irons with which they normally engage.

While I have described my invention in a certain preferred embodiment, modifications might be made without departure from the principles of the invention. Therefore I do not wish to be understood as limiting the invention to the particular constructions, arw rangements and devices shown and described except so far as the same are made limitations upon certain of the claims herein.

I claim:

1. In a drill of the character described,.

feed nut at a speed diiferent from the speed of rotation of the spindle, and means com prising a foot operated member for putting the feed nut driving mechanism out of operation and a stop for holding the same against rotation with the spindle.

2. In a drill of the character described, the combination with a threaded drill spindie, of a direct driving connection for the same, a right threaded feed nut on the threaded end of the spindle, mechanism for driving the feed nut at a speed less than the speed of rotation of the spindle, and means for putting the feed nut driving mechanism out of operation.

8. In a drill of the character described. the. combination with a rightthreaded drill spindle, of a direct driving connection for the same, a feed nut on the threaded end of the spindle, mechanism for driving the feed nut at a speed less than the speed of rotation of the spindle, and means comprising a foot operated member for putting the feed nut driving mechanism out of operation and for holding the feed nut from rotation with the spindle.

4:. In a drill of the character described, the combination with a. right threaded drill spindle, of a direct driving connection for the same, a feed nut on the threaded end of the spindle, mechanism for driving the feed nut at a speed different from the speed of retation of the spindle comprising a clutch, means comprising a foot lever for operating said clutch so as to put said feed nut driving mechanism out of operation and a stop to hold said feed mechanism against rotation.

5. In a drill of the character described, the combination with a drill spindle formed with a right thread, of a direct driving connection 101' the spindle, a feed nut on the threaded end of the spindle, mechanism for driving the feed nut in the same direction as the spindle but at a slower speed, and means for putting said feed nut driving mechanism out of operation.

6. In a drill of the character described, the combination with a casing, of a threaded drill spindle in said casing, a direct driving connection for the spindle, a feed nut on the threaded end of the spindle, and mechanism for driving said feed nut from said spindle comprising a clutch member, said clutch member and said casing being formed with stop members which are adapted to co-engage when the clutch is in inoperative position.

7. In a drill of the character described, the combination with a drill spindle and a direct driving connection for the same, of a hand crank and mechanism including a gear on said driving connection and another gear in constant mesh therewith which operate when the hand crank is turned clock-wise to rotate the spindle in the drilling direction and move the same forward either at high or low speed and when the hand crank is reversed to reverse the direction of rotation of the spindle and withdraw the same at a high speed.

8. In a drill of the cha acter described, the combination with a drill spindle and a direct driving connection for the same, of a hand crank and mechanism including a gear on said driving connection and another gear in constant mesh therewith which operates when the hand crank is turned clock-wise to rotate the spindle in the drilling direction and move the same forward either at high or low speed and when the hand crank is reversed to reverse the direction of rotation of the spindle and withdraw the same at a high speed, comprising a foot operated device for making the change from one speed to the other.

9. In' a drill of the character described, the combination with a threaded drill spindle, of a hand c ank having a direct driving connection with said spindle, a gear which revolves with the spindle. a feed nut having gear teeth on the threaded end of the spindle, a counter-shaft having a loose and a fast gear in constant mesh respectively with said first named gear and said feed nut, said gears and feed nut proportioned so as to drive the feed nut at a different speed from the spindle. and a clutch for engaging said loose gear to the countershaft.

10. In a drill of the character described, the combination with a threaded drill spindle, of a hand crank having a direct driving connection with said spindle. a gear which revolves with the spindle, a feed nut having gear teeth on the threaded end of the spindle, a conntershaft having a loose and a fast gear in constant mesh respectively with said first named gear and said feed nut, said gears and feed nut proportioned so as to drive the feed nut at a different speed from the spindle. a clutch for engaging said loose gear to the counter-shaft, and foot operated lever for moving the clutch to its inoperative position.

11. In a drill of the character described, the combination with a threaded drill spindle, of a hand crank having a direct driving connection with said spindle, a gear which revolves with the spindle. a feed nut having gear teeth on the threaded end of the spindle. a countershaft having a loose and a fast gear in constant mesh respectively with said first named gear and said feed nut. said gears and feed nut proportioned so as to drive the feed nut at a dill'erent speed from the spindle, a clutch for engaging said loose gear to the countershaft, and means for preventing the feed nut from rotating with the spindle when it is not being driven through the countershaft.

12. In a drill of the character described,

the combination with a threaded drill spindle, of a hand crank having a direct driving connection with said spindle, a gear which revolves with the spindle, a right threaded feed nut having gear teeth on the threaded end of the spindle, a countershaft having a loose and a fast gear in constant mesh respectively with said first named gear and said feed nut, said gears and feed nut proportioned so as to drive the feed nut at a lower speed than the spindle, and a clutch for engaging said loose gear to the countershaft.

13. In a drill of the character described, the combination with a drill spindle having a right thread. of a hand crank having adirect driving connection with said spindle, a gear which revolves with. the spindle, a feed'nut having gear teeth on the threaded end of the spindle, a countershaft having a loose and a fast gear in constant mesh respeetively with said first named gear and said feed nut, said gears and feed nut prop'ortioned so as to drive the feed nut at a different speed from the spindle, and a clutch for engaging said loose gear to the countershaft.

1t. In a drill of the character described. the combination with a drill spindle having a rightthrcad, of a hand crank having a direct driving connection with said spindle, a gear which revolves with the spindle, a feed nut having gear teeth on the threaded end of the spindle. a countershaft having a loose and a fast gear meshing respectively with said first named gear and said feed nut, said gears and feed nut proportioned so as to drive the feed nut at lower speed than the spindle. and a clutch for engaging said loose gear to the countershaft.

15. In a drill of the character described, the combination with a threaded drill spindle, of a hand crank having a direct driving connection with said spindle, a gear which revolves with the spindle, a feed nut having gear teeth on the threaded end of the spindle, a countershaft having a loose and a fast gear in constant mesh respectively with said first named gear and said feed nut, said gears and feed nut proportioned so as to drive the feed nut at a different speed from the spindle, a clutch on the countershaft which normally engages the loose gear, and a spring pressed device for throwing said clutch out of engagement with. said loosesaid first named gear and said feed nut said gears and feed nut proportioned so as to drive the feed nut at a different speed from the spindle, a clutch on the countershaft which normally engages the loose gear, and a spring pressed foot lever for throwing said clutch out of engagement with said loose gear.

17. In a drill of the character described, the combination with a supporting frame, of a driving shaft having a crank handle and sprocket wheel at the upper end of said frame, a drill spindle formed with a right thread and provided with a sprocket wheel and arranged at the lower end of said frame, a link belt connecting said sprockets, a gear wheel having a feathered connection with the spindle, a feed nut on the threaded end of the spindle, a countershaft provided with a loose and a fast gear meshing respectively with said first named gear and said feed nut, said gears and feed nut being proportioned so that the feed nut is driven at a lower rate of speed than the spindle, a clutch member on said countershaft adapted to engage said loose gear, and means for throwing said clutch member out of engagement with said gear.

18. In a drill of the character described, the combination with a supporting frame, of a driving shaft having a crank handle and sprocket wheel at the upper end of said frame, a drill spindle formed with a right thread and provided with a sprocket wheel and arranged at the lower end of said frame, a link belt connecting said sprockets, a gear wheel having a feathered connection with the spindle, a feed nut on the threaded end of the spindle, a countershaft provided with a loose and a fast gear meshing respectively with said first named gear and said feed nut, said gears and feed nut being proportioned so that the feed nut is driven at a lower rate of speed than the spindle, a clutch memher on said countershaft adapted to engage said loose gear, means for throwing said clutch member out of engagement with said gear, a housing inclosing said countershaft, a stop lug on said housing and a stop lug on one clutch member, said lugs being adapted to coengage when the clutch member is disengaged from the loose gear wheel.

19. In a drill of the character described, the combination with a supporting-frame, of a driving shaft having a crank handle and sprocket wheel at the upper end of said frame, a drill spindle formed with a right thread and provided with a sprocket Wheel and arranged at the lower end of said frame, a link belt connecting said sprockets, a gear wheel having a feathered connection with the spindle, a feed nut on the threaded end of the spindle, a countershaft provided with a loose and a fast gear meshing respectively with said first named gear and said feed nut, said gears and feed nut being proportioned so that the feed nut is driven at a lower rate of speed than the spindle, a clutch member on said countershaft adapted in one position to engage said loose gear and in another position to disengage the gear and hold the counter-shaft against rotation, and a spring pressed treadle for throwing said clutch member from one of said positions to the other.

20. In a drill of the character, described, the combination with a drill spindle and driving mechanism for the same, of a supporting framework for said drill spindle and driving mechanism, a foot plate, and means including a spring for pivotally and removably connecting said frameworkwith said foot plate.

21. In a drill of the character described, the combination with a casing, of a drill spindle in the casing, a direct driving connection for the spindle, rotatable mechanism releasably connectible with the spindle to receive power therefrom and feed the spindle longitudinally, a lug upon said mechanism, and a stop fixed with relation to the casing and lying in the path of rotation of said lug during the released position of the mechanism.

EUGENE WV. VOGEL.

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

. 7, Washington, D. C.

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