US2484874A - Adjustable variable slide actuator - Google Patents

Description

Oct. 18, 1949. R. w. BROWN ADJUSTABLE VARIABLE SLII JE ACTUATOR 3 Sheets-Sheet 1 Filed Feb; 18, 1948 Inven oi' (Fr U]. Brown A9 WN Filed Feb. 18, 1948 R. w. BROWN 2,484,874

ADJUSTABLE VARIABLE SLIDE ACTUATOR 3 Sheets-Sneet 2 Oct. 18,1949, R. w. BROWN ADJUSTABLE VARIABLE SLIDE ACTUATOR Filed Feb. 18', 1948 Y '5 Sheets-Sneet 3 InvenTor Rocier [L]. Brown Patented Oct. 18, 1949 ADJUSTABLE VARIABLE SLIDE ACTUATOR Roger W. Brown, Windsor, Vt., assignor to Cone Automatic Machine Company Inc., Windsor, Vt., a corporation of Vermont Application February 18, 1948, Serial No. 9,197

4 Claims. 1

This invention has for an object to provide a mechanism by which a slide may be moved in an adjustable variable manner by a moving means having a fixed law of motion.

A further object is to provide a mechanism by which a slide having slow and fast motions may have the relative extents of the fast and slow motions adjustable.

Still another object is to provide for adjustment of the relative lengths of the traverse of a slide at fast idle speed and a slow working speed and particularly as applied to a movable tool carrier, and more particularly to a tool carrier of a multiple spindle lathe.

A further object is to provide means for varying the amounts and rates of motion for the slow working motion of a tool carrier, without requiring any change of actuating cams.

Further objects and advantages will appear from a description of an embodiment of the invention shown in the accompanying drawings in which Figure 1 is a fragmentary side elevation, partly broken away, of a multiple spindle lathe embodying the invention.

Figure 2 is a sectional view to a larger scale on line 22 of Figure 1.

Figures 3 and 4 are detail sectional views on lines 33 and 4--4, respectively, of Figure 2.

Figure 5 is a detail sectional view on line 55 of Figure 4.

Figure 6 is a somewhat diagrammatic view illustrating the effect of adjustment of a crosshead block on the extent of feed.

Figure '7 is an inverted perspective view of the cam actuated slide.

Figure 8 is a detail sectional view on line 8-8 of Figure 4 showing the lever and crosshead.

The invention is shown in the accompanying drawings as applied to the end working tool slide of a multiple spindle lathe of the well known Cone type. As shown in Figure 1, a turret I having longitudinal grooves 2 in which end working tools may be clamped is mounted for axial motion along a bar 3 which is arranged coaxial to an indexing work spindle carrier 4 in which work spindles are arranged in circular array parallel to and about the axis of the bar 3. The tool-carrying turret I is arranged to be moved toward and from the work holder by a cam 5 carried by an overhead cam shaft 6, this cam having a cam groove I with which cooperates a follower roll 8 in operative relation to the slide member 9 mounted for reciprocation parallel 2 to the axis of the shaft 3. The roll 8 is journaled on a pin 82; mounted in a perforation 9a in the slide member 9.

The slide member 9 is mounted in ways l0 and as shown best in Figure 3 one side of these ways is formed by a portion of the machine frame, while the other side includes a guide member ll secured to the frame, as by screws 12, and overlying a portion of the slide 9.

As shown best in Figure 2, the member H has an edge [4 for the major portion of its length parallel to the lines of motion of the slide 9, and of a second slide member l5 which is secured to a bracket l6 having a yoke ll secured to the turret l. The guide member ll adjacent to one end has a transverse slot 20 cut back from the edge l4 and one edge of this slot forms an abutment 2| perpendicular to the edge l4 and extending laterally and spaced from this edge. The slide 9 is shown from beneath in Figure '7. It has on its under face at its forward end a recess 25 within which is fulcrumed an end portion of a lever 26 shown detached in Figure 8. As shown in Figure 5, this fulcrum is formed as an upwardly extending boss 30 which engages within a perforation 3| in the slide member 9 and is retained in position by a plate 30a secured by screws to its upper end. The lever 26 also carries near one end a stud 32 on which is journaled a cam roller 33. This cam roller extends up and is adapted to engage with the edge [4 of the guide 'member II, or in the slot 20. In Figure 2 this cam roll 33 is shown well within the slot, while in Figure 6 it is shown as partly within the slot, being in engagement with the wall portion 2| and between this wall portion 2| and the opposite face of the slot 20. This wall portion 2| constitutes a shoulder which prevents continued motion of the lever with the slide 9 after the roll 44 on the lever engages it. A guide plate 36 overlies and is secured by screws to the upper face of the member I l, this plate also being engaged at suitable times by the cam roll 33 and being provided with a concave roll-guiding edge 31 opposite to the entering end of the slot 20.

In dotted lines in Figure 2, the roll 33 is shown I gitudinally of the guideway 40, and to this end it is provided with a threaded bore 45 for the reception of a screw 46 which is journaled lengthwise of the lever 26 and is provided at its outer end with a polygonal head 41 with which a suitable wrench may be engaged so that the screw 46 may be turned, thus adjusting the block 4| lengthwise of the guideway 40 and of the lever 26 toward and from the fulcri m 3 When the tool slide is in its retracted position, the lever 26 is" in'th'e angular position where the cam roll 33 engages with the edge l4, and as the slide is moved forward by the action of the cam drum 5 with the follower 8 engaging in the cam groove 1, the slide mechanism comprising the members 9 and I5 with interoonneetion through the lever 26 move as a unit and at the same speed. As soon as the roll 33 moves beyond the edge 14, it is guided by impingement on the edge 2 I, or on the edge of the curved guide piate 36 shown in Figure 2, to enter the slot 20. The slide .5; h e lon e fheves. s a i it w t h slide 9, but is through the lever 26 which swings in a clockwise direction, the nail enter hi the sle h hele t eeh thhes es ie o be moved in accordance "with the, oontouroi the cam eieeve end the h t 9 ie-tetie ef t ee h rt yin it but th he eihe hi he s i e t is medifiedt wi l he h te thef h e r 26 i reeked by the ieh ef the shite 9 ehei th axis of the follower roli its, the rocking force from the slide 9 being exerted omthe lever 26 through its connection withthe slide'} by the pivot $0. The motion of h heet sh the heiht w er he roll it starts to enter the slot 211 to the point where the lever 6 i s ihs eht eh ne hdiehler t h line of e Qf he iidfi 9. e 1!? l m o th of h h m f is h eht fer ell es i t hehts ef th block 41, but the resultant motion o'f the memher It s. pend when the hes ieh of th le h ill with reference to the aices of pivot to and of the r t being he hi'h h whe ethe e the follower 4 isj in iihe w t e ihte iinf it s 39' s shown in ht it ii tteei 1 in) Fi ur 5 this being e me tihii m ed, P h 'wh in F gur 6 end is est h h th hi th fhi ew eh. 42 is in ial a heh eh W'ih th tell .3 iii the dotted line position of Figure 6, the feed motion of the member I 5, then loeing zero. As this motion of the member. l5 while the lever 2E; is swinging constitutes the entire slow feed motion of the slide [5, which is durinig the' tim the lever moves between its inclined posit n to the path of mo tion of the slide 9 and its perpendicular position, the amplitude oi motion of the me er I5 well as its velocity is determine y the a ustment of theblock ll. On retraction of the slide ii, the lever is swung back to its inclined position itsroll 33 following down the wall 2| of the guide member I] and flnally against the face it! of the guide plate 36 (see Figure 2),, this returning" the levertoward incline-d position where itfre mainsduring the remaining retracting'motion of the slide, The member I 5, retracts w h the sl'de 9, at a relatively high speed determined by the in of the cam groove 7 and thespeed of rotation of the cam shaft 6. i

From the foregoing description of an embodiment of this invention, it should be evident to those skilled in the art that various changesand modifications might be made vvithout departing from its spirit or scope. 4 I claim:

+3 tiei e of t la s 9Q9i e eeihhthths .4 pair of members reciprocable in parallel paths, means for reciprocating one of said members, and operative connections between said members for driving the other of said members from said one member comprising a lever fulcrumed on one of said members and pivotally and slidably connected for motion transverse to said paths to the other of said members, stationary guide means p ev hti e swihe said lev r s h ih motion of said members and permitting said lever to move bodily with said members in one direction to a predetermined point during which motion said members move together and for stopping bodily motion of said lever while permitting swinging of d lever on motion .of one of said members in i beyond said point, said guide member being shaped to cause the other of said members to move with respect to said one member at a velocity dependent upon the distance from its fulcrum of the connection of said lever to said other member.

2 A mechanism of the class described, comprising a reciprocab le member, a lever, a block adjustable along said lever from and toward its fulcrum and mere-1 y" slidable relative to said hie hheh a slide i e e h iellet e ei i t e he eht eh hieh 'e d. le e s i i e h m s hel ih et-i ei' 'e i ist" s h i' h t' throughout a predetermined extentoi motion of set s ide i h Whie eisi r e i t thember is moved simultaneously with, by and at the shi e itt e e sl i'ehd. st i h h hiehh h v htih h h' t ii ei h 1 9 011 oi s i I er W th sei heefet' e 'Pie e ihet position of said slide to cause further motion of said slide to swing said lever on its fulcrum and move said member at a velocity dependent upon the adjustment of said block along said leverl 3. A mechanism ofthe elias s described, comprising a reciprocable member, a lever, a block adjustable along said lever from and toward its fulcrum and pivoted to and laterally slidable with respect to said member, a slide movable parallel to the direction of motion of said member'and on which said lever is fulcrumed, and a guide along which said slide moves and having a portion along which a portion of said lever spaced from said fulcrum operatively bears, apart of said guide portion being parallel with the line 0i motion of said slide and'holding said lever againet swing ing motion as said slide is moved toward one end of its motion to a predetermined point, said guide having a lateral slot to permit said lever portion to enter s aid slot and rock during continued motion of said slide to cause said member to be moved by said slide proportional to the distance ofsaid fulcrum from thepivotai connection to said lever .of said member. A

4. A mechanism ofthe class described, comprising a reciprocable member, a lever, a block adjustable along said lever from and toward its fulcrum and pivoted to and laterally slidable with respect to said member, a slide movable parallel to the direction of motion of said member andon which said lever is fuicrumed, a guide along which said slide moves and having 'a portion along which a portion of said lever spaced from said fulcrum operatively bears, a part of said guide portion being parallel with the line of motion of e i sl e h he e ih id ve e hst swinging motion as said slide moved toward one end ofi its motion to a predetermined point, said guide he h e let iei i l te her hit .ei ev eeitiei e en er ei slot a d eeh hhf h e htimie heieh. hi ei i. 51 5i? t9 ehs said, hie h e te' he 2,484,874 5 moved by said slide proportional to the distance REFERENCES CITED of said fulcrum from the pivotal connection to said lever ,of said member, said slide having a g ifi ggigg are of record m the shoulder beyond said slot to be engaged by and prevent continued motion of said lever in the r, direction of motion of said member after the en- 5 UNITED STATES PATENTS gagement of said lever on said shoulder. Number Name Date ROGER W. BROWN. ,0 9 Gocht Feb. 6, 1945

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