US2350066A - Hydraulic motor - Google Patents

Description

May 30, 1944.

HYDRAULIC MOTOR Filed March 31, 1941 Patente'd May 30, 1944 UNITED STATES PATENT OFFICE.

nvnaaomc moron;

Aiflilll' L. Parker, canine, om, alignor to The Parker Appliance Company, Cleveland, Ohio, a corporation of Ohio Application March :1, 1941, Serial No. 386,219

,1 Claim. (cl. co -er) This invention relates to improvements in hydraulic motors, and more particularly to & Wil of motor in which fluid under pressure supplied from an outside source will impart limited rotation to the motor shaft.

An object of this invention is to provide a motor of the type described in which the vane varying torques of predetermined magnitudes upon the motor shaft.

The above and other objects of the invention will in part be obvious and will be hereinafter more Iullypointed out.

In the accompanying drawing:

Figure 1 is a top view, in section, taken along the line A-A of Figure 2.

Figure 2 is a side view in section, taken along the line 28-3 of Figure 1.

Figure 3 is a diagrammatic view showing one form of piping arrangement for supplying fluid asatllandinwhichismountedabushinglL The closure plate It also includes a centrally located Pmlecting portion ll having'a central bore It in which is mounted another bushing 2|. A shalt I2 is mounted within the casing and is journaled in the bushings it and II, as shown. A

thrust bearing 23 is provided in the recessed lower end 01 the shaft 22 for taking end thrust thereon.

Keyed to the outer end of the shaft 22 by means oi the keys 23a is a flange 24 with spaced bolt holes "to allow proper connection to the part which it is desired to rotate by means of the mo-, tor. A suitable bushing 2C is provided within the counterbore 21' oi the extension I! for iournaling the hub extension 24a 01 the flange 24. Intermediate the bushings II and It there is provided any suitable packing means 20 for sealing against the. leakage oi fluid from within the casing Ill.

Intermediate the ends of the shaft 22 and formed integrally flierewith there is a circular flange portion 29. This flange portion is preferably spaced a greater distance from either of the end wall portions I! or it so as to divide the bore ll into two chambers and ll of unequal length. In the present instance as shown in Figure 2 the flange 20 is spaced closer to the end wall radially projecting rib or vane 34 which extends from the end wall I! to the end wall I3.

Rigidly mounted as at 35 within the chamber .3. and extending from the end wall l3 to the flange 29 of the shall; 22 is the segmental portion 36. This segmental portion extends radially from the casing wall It to the shaft 22 and thus in conjunction with the vane 34 divides the chamber 3! into the chambers 30a. and 30b. A bore passage 3! establishes communication between the chamber 30-a and a threaded outlet ll in the casing II). A similar passage 38 establishes communication between chamber 30-!) and a threaded outlet in the casing ill. To these threaded outlets 39 and 40 are connected fluid conduit lines 4| and 42 which lead to a suit able reversing valve 43 o1- conventional design.

A second segmental portion 44 similar to the segmental portion it is mounted within the chamber ii and divides it into the chambers 3i-a and il -b in a like manner. Passages 48 and 46 establish communication with the fluid conduits 41 and 48 respectively. A second valve 48 similar to the valve 43 controls the passage or mud in the conduits 4! and 4s.

In the operation of the motor, the valves 43 and 48 may be turned to the position as shown in Figure 3. with this arrangement, the pressure supply pump will force fluid through the valve 48, the conduit 41. the Passage 45, and into the chamber 3l'a. The pressure of this fluid upon the vane 34 will cause the latter to rotate in a clockwise direction as viewed in Figure 3. Since sage 38, conduit 42, valve 53, conduit 6|,passage 31 into the-chamber 3H. Thus the turnin torque exerted on the flange 243 is directly dependent on the area of that portion 01. the vane 34 which extends within the chamber 3i. 90 degrees rotation of the valve 65 will connect the pressure line 5ia with the line 68, the passage 46, and the chamber 31-?) to cause the van 31! to rotate in a counterclockwise direction as viewed in Figure 3.

In a similar manner, the valves 63 and 59 may beadjusted so that fluid under pressure will be admitted to either chamber 3H or 38-h and cause either clockwise or counterclockwise rotation of the flange 2t, and at the same time free circulation established between the chambers 3 l-a and Sl-b. Since the chamber 30 extends axially farther than the chamber 3|, there is a greater vane area subjected to fluid pressure, and therefore, a greater torque transmitted to the flange 2 when the chamber at is utilized than when the chamber 3i is utilized.

I claim: I

A fluid motor comprising a cylinder. a transverse partition for dividing said cylinder into separate chambers, an oscillatable shaft disposed centrally of the cylinder and extending through the partition and both of said chambers, a vane in each chamber extending longitudinally thereof, each vane being oscillatable and rigid with the shaft and extending from one end of the chamber to' the other in which it is located and also contacting at its free edg with the cylinder wall an abutment in each chamber extendinglongitudinally thereof and fixed to the cylinder wall, said abutment being in contact with the shaft, each'of said abutments having ports leading through opposite sides thereof to the chamber with which it is associated, a fluid supply for the motor, independently operated-valves disposed between the fluid supply and'the respective chambers, each valv having ports adapted to be positionedso that fluid may be directed to the chamber with which it is associated at either side of the abutment and exhausted from the other side, and a port for connecting the chamber at opposite sides of the abutment so as to provide a neutral closed fluid chamber.

ARTHUR L. PARKER.

Images