US2059659A

US2059659A - Driving device fob texttte machines

Info

Publication number: US2059659A
Authority: US
Publication date: 1936-11-03
Anticipated expiration: 1953-11-03

Description

Patented Nov. 3, 1936 PATENT OFFICE Y 2,059,659 DRIVING DEVICE Fon TEXTILE isIAcIIINEsv Kurt Gustav Scheibel, Dresden-Strehlen, Germany, assignor to WrkervG. m. b. H., Dresden A, Germany Application October 23, 1934, Serial No. 749,641 In Germany October 6, 1933 14 Claims. (Cl. 66-82) This invention relates to a driving device for textile machines. It is well known that in such machines includingtheir diierent sub-groups as, for instance, knitting machines many parts have to be moved in very diierent manners so as to obtain the regular formation of the meshes and the forward movements of the ware produced. Frequently the said parts must be stopped for regular cooperation, whereas other parts even then must be set into more or less rapid motion. It is important to remark here that in this case a great number of needles must be moved by means of the relatively heavy needle bars in various manners.

It is common to use a cam-control for moving the several parts of such machines and it has also been proposed to obtain a compulsory guidance by means of continuous curves. However cam-guiding only permits of relatively small working speeds as a close contact between the cam pins and the cams cannot be attained even when using strong springs, and pins guided in continuous curves are worn out so rapidly that anexact guidance becomes illusory. This inconvenience cannot be removed by substituting for the continuous curve the well-known arrangement of two eccentrics movingy in opposite directions, by which at most the knocking effect is reduced without reducing the wear, and ,no exact guidance in high-speed machines is obtained.

Where it has been attempted to employ combined gears in textile machines instead of the usual pure eccentric-drive, always open or continuous cam-guiding was combined with' swinglever guiding wherebyobviously Vno increase of the working-speedcan be obtained, but only drives of still more complicated construction are produced which, it is true, make it possible to create special possibilities of driving, but at the expense of the working-speed.

In contradistinction hereto the parts of the textile machine to be moved are actuated from the couple-bar of a quadrangular link system containing a crank by ay connecting-rod linked to.

the couple. It is well known that the individual points of the couple-bar of a .quadrangular link system containing a crank or arms or the like jrnounted on'the couple-bar describe continuous curves having in parts the shape or approximately the shape of circular arcs, and that the connecting-rod linked to the couple-bar may be proportioned as to its length and to the position of its point of application in such a manner that this pointwhich is in itself capable of being displaced-stands still while the linkage point describes a circular arc of the couple-curve. In this way it is possible by correctly choosing the couple-curve to insert one or several stops at any desired time except at the reversal points of 5 the connecting crank. On the other hand, a movement absolutely insensible to the actions of high speed takes place of parts coupled with one another only by joints, which at will may be made strong and resistive as to journalling 1u and so forth. In this way with a relatively small motion of masses a clean guide of the gear elements allowing any speed is obtained.

It may be noted that it has already been proposed to effect the control of the movable elel5 ments of textile machines by a connecting-rod linked to a swing-arm, the bolt of the joint being radially adjustable and being guided in a curve whilst the swing-arm itself forms part of a quadrangular link system containing a crank. In this construction the fulcrum is not guided in a continuous circular curve, but still in a guiding curve in which it moves to and fro, whereby it is again impossible, especially with higher working-speeds, to'avoid the wear in the curve, with- 25 out counting that in the old construction the connecting-rod does not derive its motion from the couple-bar of the quadrangular link system containing a crank and therefore the benets of the stopping at any desired point or points during one working revolution cannot be obtained.

The derivation from the couple-bar of the quadrangular link system containing a crank do'es not exclude connecting a plurality of driving rods with one and the same couple-bar so that if desired all movable elements of a textile machine coming into consideration may be driven by means of a single quadrangular link system containing a crank, with high speed and with independent stops. c 40 It may further be noted that it is old in itself to derive the drive of the movableelements of machines from the couple-bar of a quadrangular link system containing a crank, but that j'ust the application of this measure to textile machines entails the above-mentioned especial advantages.

The invention is illustrated by way of example in view of a cotton-machine in the annexed drawing which shows" diagrammatically the arrangement of the intermediate members for moving a needle-bar in vertical and horizontal direction.

The needles I are fixed in the well-known manner on a needle-bar 2 made of a light metal for reducing the weight. The needle-bar 2 is 55 fulcrumed in a joint 3 and has a prolonged arm The needle-bar is supported by two levers 5 journalled on a shaft 6 supported by the arms I6. 'I'he levers 5 are divided in thevmiddle by a slot 'I to permit of adjusting the needle-bar as to its height by screws 8. The movement of the single needle-bars which are arranged one4 beside the other is effected from a lever 9. The

levers 9 are likewise journalled on the shaft 5, but are connected with the levers 5 supporting the needle-bars. Each lever 9 is connected with a link I0 by a joint II and is driven by a quadrangular link system. The latter comprises an eccentric I2 mounted on a main-shaft I3.- This eccentric forms the crank of the quadrangular link system and encompasses, by extension of the pivot, the driving shaft. Owing to the large surface, heavy forces may be sustained, an important advantage in the case of high speeds of the machine.

On the eccentric I2 is mounted the couple-bar I4 which is engaged by the wing I1 by means of the pivot I5. The wing II is fulcrumed at I6' in the frame I8 of the machine. The couple-bar is engaged by the link Ill by means of the'pivot I8. The axis of the pivot I8 forms one couplepoint which on the rotation of the eccentric I2 describes a curved path which may greatly vary according to the disposition of thecouple-point in view of the quadrangular link system and is correspondingly subjected to different rules.

According to the selection of. a couple-point the movement of the link I0 may be transferred to the lever 8 with diierent strokes, but also the times and speeds may be varied. Moreover certain requirements demanded by the member to be driven may be fulfilled by these couple-curves.

For instance, when the vertical movement of the needle is to be stopped at a certain time and in a predetermined position, a couple-point may be selected in which fraction of a couple-curve corresponds to or approximates the radius of. the

link. As soon'as the link swings out according to the radius of the couple-curve, the lever 8 is stopped. Then the bolt of the joint forms a fulcrum for the link I0.

Couple-points may also be selected, the motion-curve of which comprises at several points a circular arc having the same radius. In this case, when employing a link of corresponding length, a number of stops may be obtained during one revolution of the crank of the quadrangular link system corresponding to the number of curve elements having a corresponding circular arc curvature.

It is also forthwith possible to derive one or4 more movements from the couple-bar of a quadrangular link system. In the form shown, for instance, the horizontal movement of the needle is derived too. In the bearing I9 on the couplebar a bolt 28 is journalled carrying an eccentric 2 Iv and possessing a lever 22 at its foremost point. 'I'he lever is drawn by a draw-spring 23 against a stop pin 24. This stop pin 24 is attached to a link 25 consisting of two parts connected with each other by screws 28. The other end of the link is connected with the lever 4 by a joint 21. The link 25 is divided into two parts in order that an easier adjustment when mounting may be obtained. However the links may also be differently adjusted by providing a set-screw or the like between the two parts of the link. On the link 25 a second stop pin 28 is provided serving likewise as an abutment for the lever 22.

When in a certain case the needle I is to be brought out of the range of its working position, the lever 22 is swung from4 the left to the right hand (Fig. l) and touches the stop pin 28, the draw-spring tending to press the lever against 5 the stop pin 28. During this 4motion the eccentric 2I has lbeen swung out and draws the link 25 likewise to the right. The lever 4 follows this movement again swingingthe needlebar with the needles to the left. This arrangel0 ment aords the advantage of the whole of the moving members not being separated from one another, as hitherto usual, so that even with a rapid speed of the machine an automatic disconnection of the lever 22 is excluded. Of course 15 also several bolts 20 may be connected with one another whereby several needle-bars are disconnected at the same time. Also the link 25 may fulfil the same requirements as described in connection with the link III. Also here it is pos- 20 sible to obtain different speeds and movements as well as stops.

The here described drive is not only distinguished by its stability and simplicity as compared with the drives heretofore known, but is 25 extraordinarily suitable for allowing high revolution members. A's large surfaces are provided for the bearings a quiet movement of the machine is warranted.

Finally it may be noticed that of course couple- 30 curves may also be derived from couple-gears in which a straight guiding is substituted for a link.

In the following claims the term connecting bar is intended to dene a couple bar described 35 above.

I claim:

l. A driving means for the mesh forming elements of textile machines such as needle bars, taking oiI combs or the like comprising a drive 40 shaft, a crank actuated by said drive shaft, a

connecting bar pivotally connected to said crank,

a link oppositely connected to said connecting bar and having at the other end a xed fulcrum, a connecting` rod pivotally connected to 45 said connecting bar, said connecting rod being adjustable in length and means connecting said connecting rod to said elements.

2. A driving means for the mesh forming elements of textile machines such as needle bars, taking oif combs or the like comprising a drive shaft, a crank actuated by said drive shaft, a connecting bar pivotally connected to said crank, a link having one end pivotally connected to said connecting bar and the other end pivotally connected to a fixed fulcrum, a plurality of adjustable connecting rods adjustable in length pivotally connected to said connecting bar and means connecting said connecting rods to said elements.

3. A driving means for the mesh forming elements of textile machines such as needle bars, taking off combs or the like comprising a drive shaft, a link system actuated by said drive shaft including a connecting bar, an eccentric mounted in said connecting bar and means controlled by said eccentric governing the horizontal movements of said elements.

4. A driving means for the mesh forming elements of textile machines such as needle bars, taking off combs or the like comprising a drive shaft, an eccentric mounted upon said drive shaft,

a connecting bar actuated by said eccentric, a link having one end pivoted to said connecting bar and the other end pivoted to ailxed fulcrum, a u

connecting rod connected to said connecting bar -governing the verticalmovementsof said elements, a second eccentric mounted upon said connecting bar and means governing the horizontal movements of said elements controlled by said eccentric. o

5. A driving means for the mesh forming elements of textile machines such as needle bars, taking 01T combs or the like comprising a drive shaft, a link system actuated by said drive shaft, including-a connecting bar, means connecting said elements to said connecting bar of said link system, an eccentric mounted upon said connecting bar, means governed by said eccentric controlling 'the horizontal movements of said elements, a lever member upon said eccentric and means for holding said lever member in two different positions so as to maintain said elements in either operative or inoperative position.

6. A driving means for the mesh forming elements of textile machines such as needle bars, taking off combs or the like comprising driving means, a connecting bar actuated by said driving means and means connecting said elements to said connecting bar at pivot points on said bar and offset from the line of action of said connecting bar whereby standstills and positive and negative accelerations of said elements may be secured.

'7. A driving means for the mesh forming elements of textile machines such asneedle bars, taking oi combs or the like comprising a drive shaft, a crank driven by said drive shaft, said crank constituting one member of a link system. a connecting bar actuated by said crank and means connecting said elements to said connecting bar at pivot points on said bar and offset from the line of action of said connecting bar whereby standstills and positive and negative accelerations of said elements may be secured.

8. A driving means for the mesh forming elements of textile machines such as needle bars, taking off combs or the like comprising a drive shaft, a crank driven by said drive shaft, a connecting bar connected to said crank, a link member connected to said connecting bar and having a fixed fulcrum and means connecting said elements to said connecting bar at pivot points offset from the line of action of said connecting bar whereby standstills and positive and negative accelerations of said elements may be secured.

9. A driving means for the mesh forming elements of textile machines such as needle bars, taking off combs or the like comprising a drive shaft, a crank actuated by said drive shaft, a

connecting bar pivotally connected to said crank, a link connected at one end to said connecting bar, said link having its other' end pivoted to a fixed fulcrum, a connecting rod pivotally connected to said connecting bar and a pivot point oiset from the line of action of said connecting bar and said elements being actuated by said connecting rod whereby standstills and positive and negative accelerations of said elements may be secured.

10. A driving means for the mesh forming elements of textile machines such as needle bars, taking off combs or the like comprising a drive shaft, a link system having a connecting bar actuated by said drive shaft, a plurality of connecting rods connected to said connecting bar at pivot points offset from the line of action of said connecting bar and means connected to said connecting rods for actuating said elements whereby standstills and positive and negative accelerations of said elements may be secured.

11. A driving means for the mesh forming elements of textile machines such as needle bars, taking off combs or the like comprising a drive shaft, an eccentric mounted upon said drive shaft, a connecting bar pivotally mounted upon said eccentric, a link pivoted at one end to said connecting bar and having the other end pivoted at a xed fulcrum and means connecting said elements to said connecting bar at pivot points oiset from the line of action of said connecting bar whereby standstills and positive and negative accelerations of said elements may be secured.

12. A driving means for the mesh forming elements of textile machines such as needle bars, taking 01T combs or the like comprising driving means, a link system having a connecting bar actuated by said driving means and a connecting rod pivoted to said connecting bar at a point offset from the line of action of said connecting bar connecting said elements whereby standstills and positive and negative accelerations of said elements may be secured.

13. A driving means for the mesh forming elements of textile machines such as needle bars,

.taking off combs or the like comprising driving means, an veccentric actuated by said driving means, a connecting bar controlled by said eccentric and means connecting said elements to said connecting bar at pivot points on said bar and offset from the line of action of said' connecting bar whereby standstills and positive and negative accelerations of said elements may be secured.'

14. A driving means for the mesh forming elements of textile machines such as needle bars, taking off combs or the like comprising driving means, a link system having a connecting bar actuated by said driving means, links connected to said connecting bar at pivot points offset from the line of action of said connecting bar, said links corresponding to the radii of arcs contained in the curves defined by fixed points in said connecting bar and being connected to said elements whereby standstills and positive and negative accelerations of said elements may be secured.

KURT GUSTAV SCHEIBEL.