US1618479A

US1618479A - Driving mechanism for presses

Info

Publication number: US1618479A
Application number: US43426A
Authority: US
Inventors: Schull Leopold
Original assignee: Individual
Current assignee: Individual
Priority date: 1924-03-14
Filing date: 1925-07-13
Publication date: 1927-02-22
Anticipated expiration: 1944-02-22

Description

l Passed" Feb. 22, 1927.

UNITED STATES.

LnoroLn scHULL, or VIENNA, AUSTRIA'.

PATENT DRIVING MEcHANIsM Fon rnnssns.

Application mea Jul 13, 1925, serial No. 43,426, and in Austria 1km-en 14, 1924.

This invention relates to improvements in 16 complished by means 4of the ram which is` connected to the eccentric rod, and the eccentric which is directly'm'ounted on the shaft. Theim ulse which is thus imparted to the shaft o the press by means of the reaction ofhA the standard injuriously affects the coupling members which connect the said shaft to av prnnary driving member. These coupling members ordinarily have bolts, lugs or the like or one of them, which enter into slots lo- .cated in the other. member of the cou ling, and these .slts permit a relative latera play or movement therein of the entering parts. [n order to obviate these disadvantages, couplin -have been proposed in which the play 80 of t e enteringbolts or the like has een.

obviated. However, owing to the considerable ressure exerted by the entering driving 'menig'ers upon the walls of the slots, such devices Vhave not been a success, more particularly` because of thewnumerous and sudden` changes in driving force incidental vto the operationof fast running presses. -According to\ the present invention, which is very we adapted oreccentric presses provided with couplings of any"desired conl struction and adapted to be thrown-in during the loperation, the disadvantages just described/are obviat'ed by means of arranging an additional frictiongcoupling, which is effective in case of a relative rotation of the two parts tobe coupled, opposite in direction to the desired revolution thereof. l One embodiment of the present invention is illustratedby way of example on the accompanying sheet@ drawings in whichlllig. 1 is a' sectional elevation'of a deyice lembodying subj ect-matter of the invention,

Fig. 2 isa transverse section of the -device shown in Fig. 1, the section being taken on lille 2-1-2 of Eig. 1 in thedirection of the arrows,'and 5 10h the ram is actuated by an ec rangement.

Thereference character 1 designates the shaft of the eccentric press, on which `is Fig. 3- illustrates a front view of 4the armounted freely rotatablea flywheel 2, the

boss 3 of the latter being provided with longitudinal recesses 4 (for example` three re` cesses) at the ,left hand side face.` A clutchsleeve 5 is keyed to the shaft 1 and it is provided with longitudinally extending holes, in which pins 6 are slidably arranged. A compression-spring 7 is located in a recess, partly extending through each said pin, eacli said spring having the tendency to continuously force the associated pin against'the flywheel ofthe press to enter one of the recesses 4. f

Oneend of each spring 7 rests against the bottom ofthe hole, in the pin 6, while .the other end of each said sprin is enga ed by the end ofy a bolt 9, whic is slidaily mounted in the recess of the corresponding pin 6. The left-hand. end of each bolt 9 l abuts the fixed frame of the press. The cou-' pling just described is intended for' permitting a rotation of the iywheel with respect to the sleeve in the direction of thearrow P1 in'Fig. 2, the said rotation corresponding to the transmission of power. In order to prevent any shockfrom being transmitted to the sleeve 5 because of the reaction of the tensed standard, an additional friction coupling is prqvided. This is immediately effective when because of the delivery ofenergy from the tensed standard, the sleeve 5 is Aurged to advance with respect to the flywheel, which would tend to produce a relative reverse movement between and said flywheel 2. l

A sleeve 11 is' provided at the outside said sleeve 5 thereof with a quick screw-thread and at the inside with a flat screw-thread ofvsmall pitch.' This sleeve 11 is screwed on the reduced end '10 of the eccentric shaft 1, the said end being furnished with va corresponding` flat screw-thread, .and an outer sleeve 12 providedwith a quick screw-thread engages with the quick screw-thread of the inner sleeve 11. The outer sleeve 12 is provided with an annula'r `and conically shaped friction-

surface

1,3, which is ada ted to cooperate with a correspondingl s aped 4conical surface located at one si e of the boss 3 of the flywheel.l A screw-threaded pin 14 -is screwed into'the outer face of the sleeve 12, and one end of a tensin springl 15 is hooked into theprojecting end of the' pin i i 14, while the other end of this s ring enlll gages the end of a in 16, screwe into the end 10 of the sha t 1. The pin-coupling arranged at the left side -of the flywheel, serves to couple sleeve 5 and flywheel 2 to cause them to move in the proper direction (indicatedby the arrow P1 in Fig. 2), to transmit the power for the working stroke of the press: During the upstroke ofthe ram or platen, the reaction of the standard imparts to the shaft of the press and thus also to the sleeve 11, firmly connected with the same, a tendency to advance with re- 'spect to the flywheel (equivalent to the relative rotation between the flywheel and the sleeve as indicated by the arrow P2 in Fig. 2). That is, the pins 6 would tend to move towards the other ends of slots or recesses 4. Then the outer sleeve 12, which is continuously urged towards the flywheel by the tension of the spring 15, is coupled to the said flywheel by the action of the conically shaped friction-face 13, and a frictional clamping connection will be immediately produced between the flywheel and'the shaft of the Tess by the action of the quick righthande threads of

members

11 and 12. The

.greatest part of the potential energy accuthe said flywheel, a sleeve mounted upon said projecting end of the shaft and having an.

coupling means from their operative positions.

2. A driving mechanism for presses comprising a shaft, a flywheel mounted on said lshaft and revoluble with iespect thereto,

coupling means adapted to couple the said flywheel to the said shaft while permitting a relative movement between the said shaft and said flywheel in opposite directions, and additional coupling means between said flywheel and said shaft automatically operable bya relative turning of said shaft with respect to said flywheel in the normal direction of movement of the said shaft.

3. In a driving mechanism for presses, the combination of a shaft, a flywheel mounted on said shaft and freely Ievoluble with respect thereto, a sleeve keyed to said shaft and adapted to turn therewith, vsaid flywheel and said sleeve respectively having interfitting pins and recesses adapted to couple them said pins being circumferentially movable in said recesses, and additional coupling means operative to couple the said shaft and the said flywheel when the said pins move in the said recesses away from their normal operative positions.

LEOPOLD SCHULL.