US2550601A

US2550601A - Fluid pressure actuating device

Info

Publication number: US2550601A
Application number: US64766A
Authority: US
Inventors: Leo F Rosenberg
Original assignee: BETTY CHRISTENSEN
Current assignee: BETTY CHRISTENSEN
Priority date: 1948-12-11
Filing date: 1948-12-11
Publication date: 1951-04-24
Anticipated expiration: 1968-04-24

Description

AW 395115 F. ROSENBERG 2,55%,6M

' FLUID PRESSURE ACTUATING DEVICE Filed Dec. 11, 1948 v 2 Sheets-Sheet 1 IN VEN TOR.

L. F. ROSENBERG FLUID PRESSURE ACTUATING DEVICE Apyifi 24, 3951 2 Sheets-Sheet 2 Filed Dec. 11, ,1948

I INVENTOR. .ZQFfiOSGfZGZZQ 0M Patented Apr. 24, 1951 FLUID PRESSURE ACTUATING DEVICE Leo F. Rosenberg, Chicago, Ill., assignor of fivetwentieths to Betty Christensen and four-twentieths to Stanley Howard, both of Chicago, Ill.

Application December 11, 1948, Serial No. 64,766

3 Claims. 1

This invention relates to new and useful improvements in fluid pressure actuating devices, and has particular relation to an improved cylinder and piston actuator.

The piston of the device of the presentinvention hasa rod which is adapted, for example, to form the ram of a punch press or for other similar uses, and the rod has means thereon for operation upon work with which alignment must be maintained.

One of the main objects of the present invention is to provide an improved form of device of V the class described wherein the piston and piston rod are prevented from turning in the operation of the piston, whereby at all times to maintain the work engaging means in alignment with the o Another object of the invention is to provide a bar fixed against turning to a cylinder head at one end of the cylinder and projecting axially within the cylinder, in conjunction with a piston and/or piston rod having an axial bore with-.

in which the bar extends for axial movement of the piston and/or piston rod along the bar,. and means for splining the piston and/or piston rod to the bar to prevent turning of the piston rod wherebyto maintain the work engaging means inalignment with the work while permitting slidin movementof the piston within the cylinder.-

Another object of the invention is to provide in an improved form of device of the class described means for securing the bar .to the cylinder head in a manner which will permit the bar to bereleased and turned to different angular positions and fixed against turning to the cylinder-head in any of such different angular positions foradjustmentof the work engaging mean into different work engaging positions and into different positions for different work.

Another object of the invention is to provide in a deviceof the class described a cylinder head adapted for rigidly mounting the device in different positions and also adapted for'mounting the-device for swinging movement.

Another object of the invention is to provide an improved form of device having various features of novelty and advantages, and which is particularly characterized by its simplicity in construction, its economy in manufacture, and its effectiveness in use.

Further objects and advantages of the invention will appear from the following detailed description, taken in connection with the accompanying drawings which illustrate the manner of constructing and using an illustrative embodiment of the invention.

In the drawings:

Figure 1 is a fragmentary elevational' view showing a cylinder and piston actuator embodying the present invention; I

Figure 2 is a top plan view of the cylinder andpiston actuator looking from the top of the de-, vice, as shown in Figure 1;

Figure 3 is a fragmentary detail view of the cylinder and piston actuator partially in section and partially in elevation;

Figure 4 is a detail section taken on the line 4-4 of Figure 3; and

Figure 5 is a bottom plan view of the lower cylinder head and with the piston rodin; sectiorn Referring now to the drawings, the numeral I indicates the tubular cylinder wall having a pair of

cylinder heads

2 and 3, one at each of the opposite ends thereof. 7

The

cylinder heads

2 and 3 have cylindrical protuberances which fit telescopically in the adjacent ends of the cylinder I. The cylinder headsare secured upon the opposite ends of the cylin-- der I, for example by screws 4 having heads disposed in recesses in collars 5 and abutting the, shoulders at the inner ends of the recesses and shanks screwed into the respective cylindemv heads. The collars 5 abut split rings 6 engaged, in external circumferential grooves l in the, cylinder wall, one adjacent to each of the opposite ends of the cylinder. An annular sealing ring 8 of suitable material is compressed between each

cylinder head

2 and 3, and the adjacent ends of the cylinder I. I

The

cylinder heads

2 and 3 have passages or ports 9 and I 0 respectively, to which external pneumatic, fluid, or hydraulic pipes II and I2 may be connected as shown more or lessdiagrammatically in Figure 1. Valve means (not shown) may be provided for introducing fluid pressure into one end of the cylinder and exhausting the fluid pressure at the opposite end of the cylinder to move the piston I3 and its connected piston rod It in one direction, and for reversing the entry and exhaust of fluid pressure to reverse the movement of the piston I3 and the" piston rod I4. This, of course, may vary widely within the scope of the invention. I Y,

The piston I3 has reciprocatory movement in the cylinder I and is provided with yielding portions l5 of rubber, leather, plastic material or the like which cooperate with the inner surface of the cylinder I. 'The rod I4, which is secured to the piston I3 for movement therewith, projects axially through an opening IS in the cylinder head 3. The cylinder head 3 has, for example, abronze bushing I! secured thereto and tightly embracing the rod It to seal the opening around the piston rod against leakage of fluid pressure while permitting reciprocatory movement of the piston rod through the cylinder head. This mayp of course, vary, for example, by providing the opening I6 through the cylinder head 3 with any suitable packing or sealing structure.

Mounted upon the piston rod [4 externally of the cylinder I and the adjacent cylinder head 3 is work engaging means for operation upon work with which alignment must be maintained. The work engaging means shown in Figure 1 comprises, for example, punches 18 secured in a punch holder it by set screws 20. The punch holder I9 is secured upon the adjacent end of the piston rod 14 by a set screw 2|.

The work which is shown in Figure 1 in the form of fiat sheet metal stock 22 is fed over a bolster member 23 which has holes 24 into which the punches 18 are adapted to enter upon passing through the stock operated upon by the punches. A stripper plate 25 has openings 26 through which the punches pass, and is adapted to strip thestock from the punches upon retraction of the latter.

A bar or rod 21 is fixed against turning movement to the cylinder head 2, and projects axially within the cylinder l. The piston l3 and piston rod l4 have an axial bore 28 within which the bar 2'! extends for axial sliding movementof the piston and piston rod on the bar 2?. The piston 13 and piston rod M are keyed or splined against turning movement relative to the bar 27, for example, by diametrically opposite and longitudinally extending keys or splines 29 which engage in registering grooves 30 in the outer periphery of the bar 21 and in the inner periphery of the bore in an inserted bushing 39. The inserted bushing 29 has pressed fit at 40 in an opening 42 in the adjacent end of the piston i3. a'nce is preferabl provided between the bar 27 and the bore 28 in the piston l3 and piston rod M. In this way the punches it or other work engaging elements are maintained at all times in accurate alignment with the work, while permitting reciprocation of the piston to move the work engaging means into and out of engagement with the work.

- In the illustrated embodiment of the invention, the outer end of the bar 27 is shouldered at 3| for abutment against a cooperating shoulder on the cylinder head 2, and has a reduced threaded shank 32 which projects outwardly through an axial openin 33 in the cylinder head 2. A nut 34 is screwed onto the threaded shank 32, and a lock washer 34' is interposed between the nut 34 and the cylinder head 2 to lock or fix the bar 21 against turning relative to the cylinder head 2.

With the structure described, the bar 2'! can be released by unscrewing or releasing the nut 34 and turned to different positions and fixed against turning to the cylinder head 2 in any of such different positions by again tightening the nut 34. This permits adjustment of the punches l8 or other work engaging means into difierent work engaging positions and into difierent positions for difierent work. 1

In the illustrated embodiment of the invention, the cylinder head 2 has circumferentially spaced openings 35 through which bolts or screws (not shown) may be inserted for rigid endwise mounting of the device on a suitable support. The cylinder head 2 also has a splayed peripheral surface having a threaded openin 31 for receiving a bolt or screw for mounting the device sidewise in rigid position upon a suitable support. The cylinderhead' 2 further has diametrically opposite andradially projecting pins or trunnions 38 for mountin the device for swingingmovement one suitable support. The trunnions as may be Clearplaced on the cylinder head 3 instead of on the cylinder head 2 where, for example, a shorter distance is desired between the pivotal support of the device and the work engaging means on the piston rod. The cylinder head 3 may have an opening 35, splayed side 36', and threaded opening 37 corresponding to openings 35, splayed side 36, and threaded opening 31 of the cylinder head 2.

The embodiment of the invention shown in the drawings is for illustrative purposes only, and it is to be expressly understood that said drawings and the accompanying specification are not to be construed as a definition of the limits or scope of the invention, reference being had to the appended claims for that purpose.

I claim:

1. In a reciprocatory precision work engaging device, in combination, a cylinder having first and second cylinder heads one at each of its opposite ends; a guide ro'd mounted in said first cylinder head for turning movement about its axis in any desired amount and through complete 360 and projecting axially inwardly from said first cylinder head, a piston reciprocable in said' 1 cylinder and having an axial bore telescopically receiving said guide rod, said piston having a piston rod projecting for reciprocatory movement through said second cylinder head, work engaging means on said piston rod externally of said cylinder for operation upon work with which precision alignment is desired, the turning movement of said guide rod permitting precision alignment of said work engaging means with different work in any precision alignment position throughout 360 about its axis, and means for locking said guide rod and thereby said work engaging means in any of said different angular precision alignment positions.

2. A reciprocatory precision work-engaging device according 'to claim 1 wherein the guide rod the different angular precision alignment positions locks the shoulder on the guide rod endwise against the cooperating shoulder on the first cylinder head.

3. A reciprocatory precision work-engaging device according to claim 1 wherein the guide rod has a shoulder for endwise abutment against a cooperating shoulder on said first cylinder head and a reduced threaded shank projecting outwardly from the first cylinder head, and wherein the means for locking the guide rod and thereby the work engaging means in any of the different angular precision alignment positions comprises a- ,nut screwed on the projecting threaded shank of the guide rod for locking the shoulder on the guiderod endwise against the cooperating shoulder on the first cylinder head.

LEO F. ROSENBERG.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS