US1613554A

US1613554A - Reciprocating bed motion

Info

Publication number: US1613554A
Application number: US40406A
Authority: US
Inventors: Berthiez Charles
Original assignee: Individual
Current assignee: Individual
Priority date: 1924-07-02
Filing date: 1925-06-29
Publication date: 1927-01-04
Anticipated expiration: 1944-01-04

Description

Jan. 4, 1927.,

C. BERTHIEZ RECIPROGATING BED MOTION Filed June 29, IQZS 2 sheetsShei 1 [711/6 nfor: C. .5 6 rf/iz'ez fH-fy s.

une 29. 1925 v a mm M 4 w 7 Q 6 H m 5% 4 C H HW m9 2y Patented Jan. 41 1292!.

STATES CHARLES BERTHIEZ, 0F PARIS, FRANCE.

BECIPROCATING BED MOTION.

Application filed June 29, 1925, Serial The present invention relates to a special drive arrangement for the table or bed of planing machines and analogous machine tools.

In the French Patent No. 527,426 of November 16, 1918, and in the addition thereof No. 23,843 of July 5, 1919, deposited in the same name an additional drive is disclosed for the effective stroke or cutting stroke of the bed or table, the said additional drive being coupled up at the beginning of the cutting stroke and uncoupled at the end thereof so as to assure a .greater cutting power.

In conformity with the present invention auxiliary tappets are used for the coupling up and uncoupling of this additional drive, which auxiliary tappets are fitted in an adjustable position on the principal tappets fixed to the table of the planing machine and thus bringing about the reversal of the table. These auxiliary tappets through a system of levers cause the displacement of a sleeve coupling fitted loosely on the shaft bearing the fixed and loose pulleys of the ordinary drive, which is coupled or uncoupled with a corresponding sleeve keyed to the shaft, the first sleeve being connected to the driving motor by gearing so that the rack of the table is driven thereby during the cutting stroke by gearing, that is to say by a positive connection in which there can be no slipping.

Consequently whatever may be the power of the motor it will be transmitted to the table of the planer during the cutting stroke without any slipping, an impossibility in a belt drive. This enables a sutliciont power to be transmitted during the cut to enable a big cut to be taken without reducing the speed of the table, thus assuring a big out put.

In addition, the coupling and uncoupling of the additional drive, by means of the auxiliary tappets fitted on the tappets which assure the reversing of the table, has the further advantage of not overloading the cam destined for the automatic feed of the toolholder as is the case in the arrangements disclosed in the patents referred to above.

The system of levers worked by the tappets is provided with a spring arrangement allowing the teeth of the two sleeves to be coupled up safely.

The accompanying drawings illustrate one example of an application of the invention.

No. 40,406, and in France July 2, 1924.

Fig. 1 is a partial end elevation of the planer provided with the additional drive arrangement.

Fig. 2 is a side elevation viewed from the left of Fig. 1.

Fig. 3 is a plan view of Fig. 1, and

Fig. 4 is an enlarged scale view showing part of Fig. 1. i

The table a of the planer is fitted as usual with the principal tappets a and a the first producing the reversing at the end of the cutting stroke and starting the return stroke, whereas the tappet a stops the drive at the end of the return stroke and starts the cutting stroke.

These tappets a and a act for this purpose on rollers fitted on a lever Z) articulated at Z) on the bed of the machine and con nected by a rod 5 (with handle 6 for hand drive) to a cam grooved slide actuating the forks b which produce the displacement of the straight and crossed belts c 0 on the loose pulleys d d and fast pulleys d d mounted on shaft d. The pulleys Li (Z actuate the movement of the table for the cutting and return stroke respectively.

In accordance with the invention, on the principal tappet a there is fitted an auxiliary adjustable tappet 0 which latter serves to produce the coupling up of the additional drive during the cutting stroke, and similarly on the principal tappet a there is fitted a tappet 6 also adjustable, which produces the uncoupling of the additional drive.

At the end of the return stroke of the table a the principal tappet a meets the small bent lever f articulated at f on a bent lever g turning on the fulcrum b of lever b. The small bent lever f oscillates in letting the tappet (0 pass then regain its original position under influence of a recoil spring f When the table comes back after travelling a distance of approximately 2 inches in the direction of the cutting stroke the auxiliary tappet e fitted on. the principal. tappet a, knocks against the lever and carries with it this small lever at theopposite back end of the transverse shaft h is fixed a lever h connected by a sliding articulation to a rod 2'. Rod i is in two parts connected together by a box 71 in which a spring 2' is fitted. The rod 2' is tied to a lever j secured on a small transverse shaft j on the back end of which shaft is fixed an arm j connected by a rod and an arm 7' to the articulation fulcrum k of fork 76 working a sleeve 70. The latter is fitted loosely on shaft (Z on which are fitted pulleys (Z (Z of the ordinary drive and integral with a pinion Z and a pulley Z on which passes a belt 0 driving the countershaft (not shown). This pulley Z is provided on the inside with teeth Z which can be coupled up by the longitudinal displacement of sleeve on shaft (Z with the teeth m of a sleeve m keyed on shaft d. Between the teeth m small rollers m are provided to facilitate the throwing in and out of the teeth F.

The pinion Z is on the other hand con nected by gearing a n to the motor at, the pinion n being made of a special width so as to remain geared up with pinion Z during the longitudinal displacen'lent of sleeve It) on shaft (Z. The ordinary drive of the table takes place by gears 0, 0 0 0 the latter being gearedup with the rack (i fixed under the table a.

At the end of the return stroke of the table the principal tappet a causes the small bent lever f to turn over as explained above which lets pass the tappet e". The latter in acting on roller 6 of the lever 6 produces through the intermediary of the rod b of the slide Zr and the forks b the stopping of the return stroke and the starting of the cutting stroke of the ordinary drive, in causing the belts to pass respectively on the loose pulley (Z corresponding to the return stroke and on the fixed pulley (Z corresponding to the cutting stroke.

.Vhen the table has travelled about 2 inches in the cutting direction (which length can be regulz'lted by adjusting the position of the auxiliary tappet e on tappet a this auxiliary tappet e knocks against lever causing-the same to oscillate as also lever on which it isfitted and the arm g integral with same. The movement is transmitted by means of 7 a 7L3: v .7 7 j i b, 71: to sleeve l: which is longitudinally displaced on shaft cl with the toothed wheel Z and the sleeve coupling Z The latter now comes in contact with the corresponding sleeve in so that shaft (Z receives the driving power direct. from motor a through the gears a a, Z.

During the whole effectual cutting stroke the motor a is consequently connected to the rack a of the table a by gearing so that the desired power can be suppl ed without any slipping whatsoever taking place in the transmission thereof.

During this direct motor drive of the table the belt of the ordinary drive is slipping on pulley 03 The diameter of the pulleys keyed on the countershaft and on which pass belts 0, c 0 driving pulleys Z (Z (Z is so chosen that the speed of rotation of the sleeve coupling m (impelled during the ordinary drive by the pulleys (Z (F) is slightly above that of sleeve Z directly impelled by the motor during the additional drive, so that the coupling up and uncoupling of the sleeves is facilitated.

Slightly before the end of the cutting stroke the auxiliary tappet c fitted on tappet a acts on roller 9 fitted on the bent lever g and causes this lever to oscillate in the reverse direction to the movement provoked by the tappet 6 This oscillating movement produces by the same transmission as that of the starting of the additional drive, the stopping of same. The table a continues to travel in the cutting direction under the influence of the belt driving the fixed pulley (Z by the ordinary drive. At the end of the cutting stroke the principal tappet a knocking against roller b of lever Z) causes the stopping of the cutting stroke to take place and the starting of the return stroke by means of lever b, the connecting rod 6 the slide 6 and the forks b lVith the help of the spring box '5 11 in the rod 2', the sleeve is is elastically brought towards the sleeve m until the teeth Z of the first are opposite the hollow counterpart of the teeth m of the second and come into mesh with same.

On the other hand it should be noticed that when lever g oscillates under the action of tappet e on lever f (for the starting of additional drive) the articulation fulcrums of the connecting rod 2' to the arms 7L and j are in such a position to shaft 7L that the sleeve coupling is, once it has been brought in the starting position of the additional drive, maintained in that position.

The arm 72, is provided with a handle it and is bent at the bottom in the form of a pedal 72. to enable the stopping of the additional drive both by hand and foot if need be. Should it be required to work in both directions of the working of the table, the power transmitted during the return stroke could be reinforced by using for this stroke also the additional drive which would be' started and stopped by an identical transmission to that used for the additional drive of the cutting stroke and actuated by a second set of auxiliary tappets fitted on the principal tappets.

at I claim is:

1. Means for the driving of tables of planing machines and the like. of the additional drive type for the cutting stroke of the table, comprising, a table, a rack for driving the table, principal tappets fitted to the table, an auxiliary tappet adjustably carried by each of the principal tappets, a drive shaft, means connecting the drive shaft to the rack, fast and loose pulleys on the drive shaft for the ordinary drive, a coupling sleeve loosely mounted on the drive shaft, a lever system operatively connecting the auxiliary tappets With the coupling sleeve. a second sleeve keyed to the drive shaft and arranged to be coupled to and uncoupled from, the coupling sleeve. a drive motor, and gearing connecting the coupling sleeve to the drive motor, whereby When the sleeves are coupled the drive motor positively drives the table rack.

2. Means for the driving of tables of planing machines and the like, of the additional drive type for the cutting stroke of the table, comprising, a table, rack for driving the table, principal tappets titted to the table, an auxiliary tappet adjustably carried by each of the principal tappets,

a drive shaft, means connecting the drive shaft to the rack, fast and loose pulleys on the drive shaft for the ordinary drive, a

coupling sleeve loosely mounted on the drive shaft, a lever system operatively connecting the auxiliary tappets With the coupling sleeve, a second sleeve keyed t0 the drive shaft and arranged to be coupled to and uncoupled from, the coupling sleeve, a drive CHARLES BERTHIEZ.