US1630042A - Cross-feed mechanism for machine tools - Google Patents

Description

1927' A, K. WATCHER- CROSS FEED MECHANISM FOR MACI KINE TOOLS Filed Nov. 22. 1920.

s sheets-sheet 1 1,630,042 May A. K. WATCHER cao-ss FEED-MECHANISM FOR momma TOOLS Filed Nov. 22. 1920 3 ShgetS-Sheet 2 A 1 630 042 1927' A. K. WATCHER CROSS FEED MECHANISM FOR MACHINE TOOLS Filed NOV. 22. 1920 3 Sheets-Sheet 3 Patented May 24, 192

UNITED STATES ALBERT K. WATCHER, OF CINCINNATI, OHIO.

CROSS-FEED MECHANISM FOR MACHINE TOOLS.

Application filed November 22, 1920. Serial No. 425,714.

An object of my invention is to provide a cross feed for a shaper, in which there is a positive mechanism for feeding the work only on the back stroke of the shaper. Another object is to provide a device for the purpose stated that will operate uniformly, regardless of the direction of the cross feed.

Another object is to provide a device wherein it will be possible to accurately adjust the cross-feed.

Another object is to provide a cross feed mechanism in which all ofthe parts subject to wear are stationary at all times except during the feeding ope ation.

These and other objects are attained by the means described herein and disclosed in the accompanying drawing in which *ig. 1 is a side elevation of a shaper upon which a device embodying my invention is mounted.

' Fig. 2 is an enlarged sectional view on line 2 2 of Fig. 1, parts being broken away.

Fig. 3 is a view on line 3-3 of Fig. 2.

Fig.4 is an enlarged sectional view on line 4-4 of Fig. 3. V

Fig. 5 is an enlarged, sectional view on line 55 of Fig. 3.

My invention comprises a rotatable driven shaft 6 actuated by a cam e mounted 011 the bull wheel shank a and operating upon a cross feed shaft D.

The shaper A has the shaft a extending from the side of its base a. Interiorly to the base and mounted concentric with the shaft (6 is a bull wheel, the shank a of which is shown in the drawings. The hull wheel is actuated from the pulley shaft (1, by any suitable means, such as gears. in a manner well known and requiring no further explanation or illustration. The shank a of the bull wheel is keyed to the sleeve atwhich is mounted upon the shaft ('6 and extends into the bore of the hull .vheel shank. The

shaft c'extends thru the sleeve o The outer end a of the shafta is screw threaded and the lock nut a is mounted upon the threaded section of shaft to and abuts the sleeve a and the bull wheel, the sleeve a, and the shaft (4, rotate as a Whole. A square head is formed on the outer end of shaft a to permit adjustn'ient of the stroke of the ram A. A housing a" is mounted upon the base of the shaper and encases the bull wheel shank. The housing a is mounted upon the sleeve 64* and housing a and encases the mechanism now to be described.

A flange a formed on the sleeve a serves as a bearing upon which one end of the housing a is mounted. The shoulder a resulting from the formation of the flange a" abuts the bull wheel shank. The shoulder a. resulting in like manner from the formation of the flange a. abuts the cam a mounted upon and keyed to the sleeve a interiorly to the housing a An oil chamber a is formed in the bottom of the housing a and has a drain porta in it. The plug a seats in the drain port. The sleeveza is mounted upon bearing 02 mounted in the outer wall of the housing a Suitable packing a is mounted in the bearing a and prevents lea rage of oil from the oil chan1- her a. y and preferably at right angles to the shaft a is the driven shaft Z). Shaft I) comprises the sleeve 6 and the longitudinally reciprocating shaft 6 the reciprocating shaft Extending from the housing a extending into and telescoping into the sleeve Z). The key 6 joins the sleeve and'reciproeating shaft. Mounted upon the sleeve 6 is a sleeve bearing 79 within which sleeve "6 can rotate, and upon which is mounted the slidable housing 6 The sleeve 5 is pressed into the housing a and extends into the interior thereof. Contained within the lions ing a is the friction plate l) which extends into and is keyed to the inner end of the sleeve 5. by means of the keys 6. The friction plate 6 abuts and extends beyond the inner ends of the sleeves Z) and I). An adjustment disk o is mounted upon the sleeve 7) interiorly to the housing a and immediately adjacent to such housing. The disk .7) has a series of teeth 6 upon its periphery. A pin b is mounted in the bore 7 b in the boss 7) in the housing a and is held in engagement with the teeth on the disk 5 by means of a spring 6 contained in the bore 6 of the boss 6 A lug b is mounted on the disk Z)". An adjustable abutment screw 6 is mounted on the lug b. A lever Z1 is mounted on the disk 6 and extends thru a slot 0. in the housing 0. The disk If engages the housing a adjacent to slot a and closes such slot. Mounted on the sleeve 6 and abutting the disk ifi at one end and the flange b of plate 6 at its other end is the oscillating arm I). Suitable packing 6 encased within the oscillating arm prevents escape of the oil from within the casing (i The arm 72 has a lug 7)" extending therefrom adapted to engage the abutment screw 7) on the lug 7) on the disk 72. A roller Z) is mounted upon the arm 6 and is adapted to engage the face a of the cam (1. A pawl 72 is mounted on the arm 71 and engages the teeth I) of the ratchet wheel 7) mounted upon the shoulder 6 of the friction plate 7). A washer Z) is mounted on the shoulder 5 of the friction plate between the flange o on the friction plate and the ratchet wheel 6 Formed on the friction plate 7) is a threaded plug Z), and mounted upon this plug are the washer b the springs 72 and the lock nuts 7). The springs if have sufficient tension to press the ratchet wheel I), the washer 7) and the flange 7,) upon one another that normally these members rotate as a. unit. Mounted upon the arm 6 is the coil spring 7), one end of which is secured to the disk I)" and the other end of which engages the arm I).

Upon the forward end of the shaft 7F is mounted a bevel gear 7) which engages the bevel gears (Z and (7 adapted to actuate the cross feed shaft D.

The cross feed shaft D is cased within the housing (Z, and has mounted upon it the bevel gears 11 and (Z and the double clutch sleeve d. The gears (Z and (Z are loosely mounted on the shaft D and at all times engage the beveled gear I). The double clutch sleeve (Z is keyed to the shaft D and, has teeth formed upon its opposite ends that are adapted to engage the teeth d" and (Z upon the gears (Z and (Z respectively, whereby the rotation of the shaft D may be reversed. A clutch lover (Z extends thru the housing (Z whereby the double clutch sleeve may be actuated. The clutch lever r1 has in it, interiorly to housing (Z. a bore d in which are mounted the ball (Z and spring (Z The spring holds the ball upon the interior of the housing (Z and retains the ball in one of the seats (I formed in the housim and holding the double clutch sleeve in or out of engagement with the bevel gears (1' and (F. A hand wheel (Z is mounted upon one end of the shaft D and the other end of the shaft D extends into a threaded block (Z in the work support d mounted upon the front of the base of the shaper. The work support (.7 is adapted to be adjusted to various elevations in a well known manner.

The operation of my device is as follows:

The bull wheel shank n; is driven from the pulley shafta by means; of suitable gears. The cam a mounted on the sleeve a rotates in unison with the bull wheel and shaft a and as it is revolved it. strikes the roller I) mounted on the arm N, thereby pushing the arm 6 about the axis of the shaft The paw] 1 mounted on the arm .0 is in engagement with the teeth of the ratchet wheel I) and revolves the ratchetwhcel about its axis. The springs 71 hold the ratchet wheel 6 washer 7F and friction plate I)" in frictional engagement where-- by the friction plate is rcvolvc 'l. The friction plate is keyed to the sleeve 7/ which in turn is keyed to the shaft 7) having the gear 6 mounted upon it. The arc thru which the arm 72" is moved. is determined by the relation between the roller I) and the cam (4 \Vhen the lever I). see Fig. is moved in a clockwise direction. screw 0" on the lug Z) on the disk 7.) pushes the lug b" on the arm 7) before it thereby moving the roller Z) away from the cam o. \Yhen the lever I) is moved to its limit in a clock-wise direction, the roller will be held outward beyond the cam a and the cam u. will at no time during any of its revolutions engage the roller 5 and therefore the shaft 0 will not be actuated. is the lever 7) is moved in a counter-clock-wiso direction, the roller approachcs the cam o and at first engages the outermost portion of the cam only. As the lever is moved farther in a counter-clockwise direction the roller engages more and more of the cams face. and coincipientlv as: the cam revolves it will move the roller thru an arc in proportion to the extent to which the roller is moved toward the bull wheel shank 0. The spring 71 is lcnsioncd as the roller is actuated by the cam and is moved from its normal position. consequently the roller tends to assume a position in which the spring will be untensioned and therefore will resist the cam and tend to rclurn to its normal position. The rollcr will return to its normal position as soon as the cam permits it to do so. In the normal position of the roller. the lugs 71 and a" are in cngagemeni. Should it occur that for an onionseen reason. the rotation of the shaft H or the movement of the work support 1/ is blocked. the spring 71 and \-...shc-.- b will permit the ratchet wheel b to slip upon the washer and to move about its axis without actuating the friction plate 7;.

The movement of the shaft is transmitted to cross feed shaft D by ni ans of the bevel gears 71, (Z and I]: and he double clutch (F. The cam is so mounted on thc sleeve (0* that the shaft 6 will be actuated flu only during such a time when the ram A of the'shap'er is on its back stroke, whereby the work support (Z will be fed across the shaper only at such a timewhen the ram A is on its back stroke. Tlie fixed relation of the several parts, due to the fact that they are keyed to one another assures the feed upon the back stroke. 'VVhen the clutch (Z is in its central or neutral position the work support (Z is not fed. As an added precaution, because of accidental contact of a workman with the lever (Z controlling the clutch (Z the roller b -may be moved outward beyond the cam a? by means of the lever Z1 thereby avoiding any movement of the shaft Z2 The feed of the mechanism can be readily determined by means "of the indicator plate I) mounted upon the housing a over which the index fingerb mounted on the lever 7) "extends, The pin o engaging in the teeth I) on the disk holds the disk in any adjusted position thereby assuring a uniform feed.

The telescopic shaft and sleeves b, 71" and housing permit the work support cl to be raised or lowered. The housing a adapted to move about the housing a and sleeve o and the housing (Z is adapted to move about the cross feed shaft 1). thereby avoiding any strain upon any of the parts due to the movement of the work support (Z ,As the roller is moved. by the cam, the driven shaft is actuated, and as soon as the cam has moved the roller to the limit of the cams path, the pawl ratchets over the ratchet wheel. It is during the time while the pawl moves toward its normal position that the ram A. is making its cutting stroke, wherefore it is impossible for the work supportto be fed at any time except during the back stroke of the ram. T he roller is moved out of the path of the cam by means of the lever 5 and the adjustment disk, when no feed is wanted, therefore, none of the parts except the cam will be actuated.

WVhat I claim is:

1. In .a feed mechanism the comhinaticm with a drive shaft, of a cam mounted on the drive shaft, a driven shaft for arcnate adjustment about the drive sl'iaft and comprising a sleeve and a longitudinally reciprocating shaft extending into the sleeve and keyed thereto, a ratchet wheel mounted on the sleeve, an oscillating arm mounted on the sleeve and adapted to be extended into the path of the cam, a pawl mounted on the oscillating arm and engaging the ratchet wheel. an adjustable work support, a cross feed shaft engaging the work support. and means to transmit the movement of the driven shaft to the cross feed shaft.

2. In feed mechanism the combination with a drive shaft, of a cam mounted on the drive shaft, a driven shaft for arcu'ate adustment about the drive shaft and comprisdisk.

ing a sleeve and a longitudinally reciprocating shaft extending into the sleeve and keyed thereto, a friction plate fixedly mounted on the sleeve, a ratchet wheel mounted revolubly upon the friction plate, yieldable means mountedupon the friction plate and retaining the ratchet wheel in frictional driving contact with the friction plate, an oscillating arm mounted on the sleeve, a pawl mounted on the arm and engaging the ratchet wheel, an adjustable work support, a cross feed shaft engaging the work support, and means to transmit the movement of the driven shaft to the cross feed shaft.

3. A feed mechanism comprising a drive shaft, a cam mounted on the drive shaft, a driven shaft, a ratchet wheel mounted on the driven shaft, a disc mounted for rotatable adjustment upon the driven shaft, a lug on the adjustable disk, an oscillating arm mounted on the driven sha-ft, a lug on the oscillating arm adapted to engage the lug on the adjustable disk. a pawl mounted on the oscillating arm and engaging the ratchet wheel, and means normally holding the lug" on the oscillating arm in engagement with the hiig on the adjustable disk and adapted to yieldinglv retain the oscillating arm in the path of the cam.

l -l-, A feed mechanism comprising a drive shaft, a cain mounted on the drive shaft, a driven shaft, a friction plate mounted fixedly on the driven shaft, a ratchet wheel mounted rcv-olubly upon the friction plate, a washer interposed between the friction plate and the ratehe't wieel. means mounted on the friction plate yieldablv retaining the ratchet wheel and the washer in frictional engage- ,ment with one another and with the friction plate, a disc mounted for rotatable adjustment upon adriven shaft. :1 lug on the adjustable disc. an oscillating arm mounted on the driven shaft, a lug on the oscillatingar-m adapted to engage "the lug on the ad ustable tain the oscillating arm in the path of the calli.

5. A feed mechanism comprising a drive shaft, a cam mounted on the drive shaft, a driven shaft at an angle to the drive shaft,

a ratchet wheel mounted on the driven shaft, I

2. disc mounted for rotatable adjustment upon the driven shaft, a lug on the adjustable an oscillating arm mounted on the driven shaft, a lug on the oscillating arm adapted to engage a lug on the adjust-able disc, a pawl mounted on the oscillating arm and engaging the ratchet wheel, and means normally holding the lug on the oscillating arm in engagement with the lug on the adjustable disk and adapted to yielding-1y retain the oscillating arm in the path of the cam.

6. A shaper cross feed mechanism comprising a drive shaft, a sleeve mounted on the drive shaft, a cam mounted on the sleeve, a housing mounted movablv upon the sleeve and having an oil chamber formed therein, a driven shaft extending thru the housing, a friction plate mounted on the driven shaft interiorly to the housing, a ratchet wheel mounted revolubly on the friction plate, an oscillating arm mounted on the driven shaft adapted to be moved into various degrees of registration with the cam, a pawl mounted on the oscillating arm and engaging the ratchet wheel. a cross feed shaft and means for transmitting the movement of the driven shaft to the cross feed shaft.

7. A feed mechanism comprising a drive shaft, a cam mounted on the drive shaft, a driven shaft, a ratchet wheel mounted on the driven shaft, an oscillating arm mounted on the driven shaft. a pawl mounted on the oscillating arm and engaging the ratchet wheel, a lug on the oscillating arm. a roller mounted on the oscillating arm in alignment with the cam, a disc mounted for rotatable adjustment upon the driven shaft, means to retain the disk in an adjusted position, a lug on the disk adapted to normall; engage the lug on the oscillating arm. and means mounted on the disk and on the arm adapted to retain the lugs in normal relation and to yieldingly retain the roller in the path of the cam. the adjustable disk, the oscillating arm and the roller being adjustable to such positions whereby the roller may be interposed in the path of the cam to various degrees of registration therewith.

8. A feed mechanism comprising adrive shaft, a sleeve mounted fixedly on the drive shaft, a cam mounted on the sleeve, a slotted housing mounted movably upon the sleeve, a driven shaft extending into the housing, a ratchet wheel mounted on the driven shaft interiorly to the housing, an oscillating arm mounted on the driven shaft, a pawl mounted on the arm and engaging the ratchet wheel. a roller on the oscillating arm adapted to be moved into the path of the cam, :1 lug on the oscillating arm, a disk mounted for rotatable adjustment upon the driven shaft interiorl v to the housing and adapted to cover the slot in the housing, a lever mounted on the disk and extending thru the slot in the housing, a lug on the disk adapted normally to engage the lug on the oscillating arm, teeth on the disk, a. pin mounted upon the housing, means to retain the pin in yieldable frictional engagement with the teeth on the disk, and a spring engaging the disk and the oscillating arm and adapted to yieldingly retain the lugs in their normal relation.

9. A feed mechanism comprising a drive shaft, a sleeve mounted fixedly on the drive shaft, a cam mounted on the sleeve, a slotted housing mounted movably upon the sleeve, a driven shaft extending into the housing, a friction plate mounted on the driven shaft inte'riorl to the housing, a ratchet wheel mounted revolubly upon the friction plate, means holding the ratchet wheel in yieldable frictional engagement upon the frietion plate, an oscillating arm mounted on the driven shaft, a pawl mounted on the arm and ei'igaging the ratchet wheel, a lug on the arm, an adjustable disk mounted on the driven shaft intcriorl to the housing and covering the slot in the housing, a lever extending thru the slot in the housing, a lug on the disk normally engaging the lug on the arm. means to hold the disk in an adjusted position. and a coiled spring mounted about the driven shaft and engaging the disk and the arm, the spring being adapted to yieldinglv retain the lugs in their normal positions.

10. A feed mechanism comprising a drive shaft, a sleeve mounted fixedly on the drive shaft, a cam mounted on the sleeve, a slotted housing mounted movably upon the sleeve, a driven shaft extending into the housing, a. friction plate mounted on the driven shaft; interiorlv to the housing. a ratchet wheel mounted revolubl v uponthc friction plate, means holding the ratchet wheel in yieldable frictional engagement upon the friction plate, an oscillating arm mounted on the driven shaft. a pawl mounted on the arm and ei'igaging the ratchet wheel, :1 lug on the arm. an adjustable disk mounted on the driven shaft interiorlv to the housing and covering the slot in the housing, a lever extending thru the slot in the housing. :1 lug on the disk normally engaging the lug on the arm, means to hold the disk in an adjusted position, an adjustable work support, ano a feed shaft engaging the work support and means to transmit the movcn'ientof the driven shaft to the feed shaft.

11. A shaper cross feed mechanism comprising a drive shaft. :1 housing enclosing one end of the drive shaft. and mounted for arcuate adjustment about the drive shaft, the housing having an oil chamber formed within it, a driven shaft extending into the housing and capable of arcuatc adjustment, with the housing about the drive shaft, a cam mounted on the drive shaft and contained within the housing. and means carried by the driven shaft for adjustment IO- ward and a ay from the cam whereby to effect variable contacts between such means and the cam for modifying the extent of movement of the driven shaft per revolution of the drive shaft.

12. j shapcr feed comprising a drive shaft, a driven shaft mounted for arcuate movement about the drive shaft, a cam on the drive shaft, the cam having an operating face all portions of which extend in suhstantial parallelism with the axis of the driven shaft, and a member mounted on the driven shaft and adjustable toward and away from the operating face of the cam for variable contact with the cam face for imparting variable and intermittent movement to the driven shaft.

In testimony whereof, I have hereunto subscribed my name this 15th day of November, 1920.

ALBERT K. WATCHER.

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