US2272169A - One-way clutch - Google Patents

Description

FebQlO, 1942. A. J. RANBEQG 2,272,169

ONE-WAY CLUTCH Filed Jung 5, 1939 I 2 Sheets-Sheet 1 nvmvron, ALBERT 'J. amuse-Ra.

Feb. 10, 1942. A. J..GRANBERG 2,272,159

' ONE-WAY CLUTCH Filed June 5, v1959 2 Sheets-Sheet 2 INVENTOR, 4

I ALBERT J. GRANBERG.

a right clutch l0.

- though I prefer to use the type of I 1 1 H I Albert J. Granberg, Berkeley, CaJif.,..assignor to Granberg Equipment, Inc., Emeryville, 'Califi,

a corporationof California A l ca ion June 1939, Serial No. 27 1, 295;- 5I( Jlaim s. .(o 19.2-45.1) 1

My invention'relates to a one-way clutch and more particularly to a one-way clutch ideally adapted for use in a twin pump assembly.

Among the objects of my invention are: To

provide a simple and efiicient one-way'clutch; J

to provide a means for automatically and selectively operating one of two pumps in a'twin pump unit in accordance with the will of an operator; and to provide a clutch means for selecting :one pump and. excluding the operation of the other in a twin pump unit. I p

Other objects of my invention will be appar ent or will be specificallypointed out in the description forming a part of this specification,

but I do. not limit myself to "the embodiment of the invention herein described, as various forms may be adopted within the scope of the claims.

Referring to the drawings: 1

Fig. l is a diagrammatic plan view of one preferred form of a twin pump unit embodying my invention, together with 'a wiring diagram for the operation thereof.

Figs. 2 and 3 are cross-sectional views, taken as indicated by the lines 2-2 and 33, re-

spectively, in Fig. 1.

Fig. l'is a longitudinal sectional View, taken as indicated by the line 4-4 in Fig. 2. Fig. 5 is a top plan view of. an optional gear drive.

Fig. 6 is a sectional view, taken as indicated by the line 5-45 in Fig; 5. I

Fig. 7 is a longitudinal sectional view, taken as indicated by the line 1-4 in Fig. 6.

Referring directly to'the' drawings for a more detailed description of the preferred form of my invention as shown in the various figures, and referring first to Fig. 1, a motor I drives a pinion 2 through flexible coupling 3. Pinion 2 is enclosed in gear case 4 in which is mounted a crossshaft 5 carrying a bevel gear 6- meshed with pinion 2. Cross-shaft 5 extends outside of the casing on both sides thereof. On eachend of the cross-shaft is mounted a left clutch 9 and Right clutch shaft ll connectsthrough right flexible coupling l2 to right pump l4, which may be of any known type, alpump described andclaimed by me in' my prior application for United States Letters Patent'entitled Pump, Serial No.. 1 938.

In the lefthand side of the gear case 4 the clutch shaft E5 of clutch 9 leads through flexible coupling I6 to left pump H, which may be a duplicate of pump MJMotor l is supplied with 247,765, filed December '7,

powerby line i9, preferably from three'phase alternating current mains '20 through the ous tomary. fuse box 2.! and .:a" reversing switch 22.-

Thus, motor l-can bedriven in either direction in accordance with the position of the reversing switch handle 25, which .maybe placed within reach. of a fuel loading operator'at any desired distance from theypump unit itself.

- in one direction but which will disconnect when .The selective action of the'zpump unit above described depends upontheselective action of clutches 9 and 10. These clutch'esarejof the 'so called free wheeling type, which will drive runningjin the" opposite direction;

The' internal construction, of these "clutches may be; more readily understood ;by reference toFigs. 2,3;and'4. Pumprcr'oss-shaf-tiii, on either side of casing-4;is-provided thereon.witha pair of eccentric cams 26 and 21, mounted side by side, Fitting cam 26 is a clutch shoe 29, and fittingcam '21 is a second clutch shoe 30. These clutch shoes are provided on the periphery thereof with, clutch surfaces 3lwhich are. curved to engage the inner surface. of outer casing 32' of the clutch assembly; Outer casing 32' is connected through fitting 34'to right and left pump shafts H or IE, inaccordance with the side on movement toward each other. The contact be which the clutch is being used." Thus, when the shaft 5 is being rotated, in one direction, cams 26 and 21 throw the clutch shoes 29 and 30 out-- .wardly until the clutch surfaces 3| on ,each

clutch shoe engage and lock to the inner sur-' face of clutch casing 32, thereby driving the conor IT. When shaft 5 is rotated nected pump [4 direction, however, cams 26 and in the opposite 21 drawthe clutch'shoes together until they contactoncenter line 35, which prevents further tween clutching surfaces 3land'the interior of casing 32. is broken and the shaftB ceases to drive the connected pump.

Clutches 9 and I0, mounted on reverse action with respectto the pumps l4 and the pumpto be driven can be selected by selectv I1 because the pumps face each other. so that I when the pump on'oneside is being driven the the other side is disconnected. Thus,

ing the' direction of rotation of motor I, which is done by the operator by remote control operation of reversing switch handle 24. "It is impossible. in this manner, to drivefboth pumps from the same motor, thus preventing overloading of the moton. The time required for loading is reduced, as it is not necessary for theoperator to gofr'om' a loading rack to the pump shaft 5, give house to change clutches from one pump to another in order to change liquid flow at the loading rack. Either of the pumps can be selected at will from the loading platform.

In Figs. 5, 6 and 7 I have shown a modification of my unit, utilizing a central spur gear 50 mounted on the shaft of motor I, driving lateral spur gears and 52. Here, the gears 5| and 52 are journaled to ride freely on pump shafts II or 15, and clutch casing 32 is made an-integral part of each lateral spur gear. Clutch casing 32, in this case, is preferably closed by an end plate 54, providing a bearing 55 for the end of shafts lI-l 5. Cams 26 and 21 are mounted on pump shafts II or [5, clutch shoes 29 and 30 are mounted on the cams, as described above, and thus the entire clutch assembly is supported on the pump shaft without additional bearings.

The selective operation of the free wheeling clutches is exactly as described above for the bevel gear drive, in that one of the clutches will drive one of the pumps when the motor I is running in one direction, and the other clutch will drive the other pump when the motor direction is reversed. At no time can both pumps be operated at the same time.

While I have illustrated gear drives for the two pumps, it will be obvious to those skilled in the art that direct drive can be used, with the clutches placed, one on each end of the motor shaft.

Thus, it will be seen that I am able to select one of two pumps to be driven by a single motor, by simply reversing the "direction of rotation of the motor, and this reversal of rotational direction can easily be accomplished at a distance by the use of a reversing switch in the main power supply line to the motor.

I claim:

1. A clutch comprising a drive shaft, a pair of circular cams fastened in opposite eccentricity on said shaft, a clutch casing rotatably bearing at one end thereof on said drive shaft and extending outwardly and then over said cams to define a clutch space, and having an interior surface concentric with said shaft, at the other end thereof, said casing having a central bearing for supporting an end of said shaft, a pair of shoe plates each having a bearing aperture rotatably fitting one of said cams, said plates extending laterally in opposite directions from said cams, a shoe having a face of substantially the same curvature as said internal surface and opposed thereto mounted on each shoe plate, said shoes being engaged and disengaged with said surface in accordance with the direction of rotation of said shaft with respect to said casing, and a driven member concentrically mounted on said casing.

2. Apparatus in accordance with claim 1 Wherein said driven member is a gear forming a part of said casing.

3. Apparatus in accordance with claim 1 wherein said driven member is a shaft coaxially attached to said casing.

4. Apparatus in accordance with claim 1 wherein said shoe plates have opposed inner edges making contact in disengaged position.

5. Apparatus in accordance With claim 1 wherein each of said shoes have faces of less than of arc each and are held on said cams only by having end faces terminating adjacent each end of said casing to prevent axial movement.

ALBERT J. GRANBERG.

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