US1899875A

US1899875A - Driving mechanism for flat knitting frames

Info

Publication number: US1899875A
Application number: US499055A
Authority: US
Inventors: Lieberknecht Karl Klaus
Original assignee: Individual
Current assignee: Individual
Priority date: 1929-12-04
Filing date: 1930-11-29
Publication date: 1933-02-28
Anticipated expiration: 1950-02-28

Description

Feb. 28, 1933- K. K. LIEBERKNECHT DRIVING MECHANISM FOR FLAT KNITTING FRAMES Filed Nov. 29, 1930 /n venfor: 41.64 W

Patented Feb. 28, 1933.

marmos- .1. B081, 01' OBEBLUNGWITZ, exam! DmG FOB In! KNITTING Application fled Iovember 88, 1980, lerlal Io. 499,055, and in Germany December 4, 1989.

5 in combinatio'IW'with a slip clutch and two jaw clutches on a main drive shaft, a secondary countershaft "connected to the main shaft by reducing gearing of a relatively large ratio, so as to ermit the main drive 10 shaft to be driven dlrectly from the drive motor, or indirectly through the reduction gearin By this arran ement the advantage is obtalned that for wor ing at normal speed, an engagin of the drivin shaft free from 15 shocks resu ts and that, w en working with reduced s eed, i. e. through the intermediary of the redhcingcaring, an additional controlling of this 50w speed is possible for a further reduction down to zero, i. e. to the 3 stopping of the driving shaft, although the motoris running.

An embodiment of the invention is illustrated diagrammatically by way of example in the accompanying drawing in which 25 Fig. 1 shows, partly in section, a front elevation of the driving mechanism.

Fig. 2 is a corresponding part end elevation of the slipping clutch, viewed from the right. rom an electric motor 1 or from any other suitable source of power a ulley 4 is driven by a pulley 2 through the intermediary of a belt 3, which pulley4 is loosely mounted on the main shaft 5 and arranged either in the middleof the frame or on one of the sides of the same. The driving shaft 5 drives .the cam.

shaft in lmown manner through the intermediary of pairs of gear wheels, arranged on both sides of the rame, these elements not being shown in the drawing.

. The pulley 4 has a cavity 6 in which a pin 7 is fixed in'axial direction on the body of the pulley. To this pin 7 a friction band 8 is attached, which is placed around a drum 9 keyed on a sleeve 10, which carries the pulley 4. This sleeve 10 runs loosely on the driving shaft 5 and is fitted on each end with a claw clutch 12, the other halves 13 of which claw clutches are fitted 'on the end faces 50 of

slidable sleeves

14 and 15 respectively.

The sliding sleeve 14is shiftably mounted on the shaft 5 by means of a key or feather 16. This slidable sleeve 14 has a groove 17 in its circumference with which en ages the bifurcated end of an arm 18.keye on a short rod 20 shiftable in bearings 19 of the knitting machine frame. An adjusting handle 21 is fixed on the rod 20 .which also carries on its pro ectin right hand end an arm 22, the bifurcate other end of which engages with the circumferential groove 23 of the slidable sleeve 15. The slidable sleeve 15 carries between the gortion having the circumferential groove an its end face fitted with the half 13 of the claw clutch, a gear 24 meshing with a narrower spur wheel 25 of a secondary countershaft' 26. This secondary countershaft is journalled in bearings 27 of the frame and carries further a pinion 28 meshing with a spur wheel 29 keyed on the driving shaft 5. This back gearing may be otherwise constructed, for lnstance as reducing gearing, but it works-preferably with a transmission ratio of 1:10.

The operation of the driving mechanism described is as follows If the handle 21 is pushed to the right, the rod 20 is shifted to the right so that the left

hand clutch elements

13 and 12 are engaged with each other, the machine running during the knitting of plain rows at normal speed, about to revolutions of the cam shaft. Owing to the interposition of the slipping clutch 7, 8, 9, 10, the engaging of the clutch is effected almost free from shocks. The elements of the driving mechanism are returned into the normal position shown in Fig. 1 by pushing the handle 21 to the left into its initial position. If the handle 21 is pushed to the left from the normal position, the right

hand clutch elements

13 and 12 are engaged also free from shocks. Themovements of the driving belt 3 are now transmitted upon the shaft 5 through the

gearing

24, 25, 28 and 29. This considerably reduced speed of approximately only 4 to 8 revolutions per minute permits of accurately ob serving operations at certaintimes and, if

necessary, of disengaging at the correct time,

or the clutch. It is therefore possible for the knitter to carry through an accurate con trol of the frame when the motor is running and to stop the frame accurately at any desired point similarly to when working exclusively by hand as heretofore. The slipping clutch may have any other suitable construction than that shown by way of example in the drawing.

I claim V 1. A drive for flat knitting machines comrising in combination with a motor, a drivmg shaft driven by said motor, a rotatable non-shiftable sleeve arranged on said driving shaft, coupling teeth on both end faces of said sleeve, a dr'um keyed on said sleeve, a belt ulley loosely mounted on said sleeve, a frict1on band carried by the pulley and exciated cou lin sleeve, a drum attached to said rotata le eeve, means connected to said rotatable sleeve and having a cavity, a friction band fixed on a pin in the cavity of said means and extending over said drum, and means on said driving shaft for additional hand braking said driving shaft for reducing its speed down to a standstill during the :drive of said motor.

In testimony whereof I aflix my signature.

KARL KLAUS LIEBERKNECHT.

tending over said drum, a coupling sleeve shiftably splined on said driving shaft adapted to be coupled to said non-shiftable sleeve at one side thereof, to directly drive said driving shaft, a second shiftable coupling sleeve splined on said driving shaft on the opposite side of said non-shiftable sleeve, a gear carried by said second coupling sleeve, a counter-shaft, a reducing gearing including the aforesaid gear with a transmission ratio of approximately 1:10 on said driving shaft and counter-shaft and a hand adjusting means on said driving shaft adapted to allow said driving shaft to be turned by hand for an additional reduction of speed down to and including zero when said motor is running and said reducing gear is engaged.

2. A drive for flat knitting machines com prising in combination with the driving motor, a driving shaft driven by said motor, a coupling sleeve slidably splined on said driving shaft, a counter-shaft extending parallel to said driving shaft, a reduction gearing mounted partly on said driving shaft and partly on said parallel counter-shaft, said gear ng allowing a transmission ratio of approximately 1:10, a second coupling sleeve shiftably splined on said driving shaft, an element of the reduction gearing carried by said second sleeve, a non-shiftable rotatable sleeve mounted on said driving shaft between.

said coupling sleeves, connecting parts between the first named coupling sleeve and said element of said reduction gearing for alternately shifting the gear element and asso-