US937091A - Reversing mechanism. - Google Patents

Description

J. PETRELLI.

' RBVERSING MECHANISM.

APPLICATION FILED 5113.18, 190.9.

Patented Oct. 19, 1909.

2 SHEETS-SHEET 1.

J. PETRBLLI.

nnvmsma mncmmsm.

APPLIOATION FILED JAN. 18, 1909. I

Patented Oct. 19, 1909.

2 SHEETS-SHEET 2.

nnirnn STATES PATENT canton JOSEPH PETRELLI, OF NEW HAVEN, CONNECTICUT, ASSIGNOE TO THE SNOW & PETRELLI MFG. CO., OF NEW HAVEN, CONN ECTICUT,A CORPORATION.

ianvnnsrne MECHANISM.

. Specification of Letters Patent. Patented Oct. 19, 19(99.

Application filed January 18, 1909. Serial No. 472,890.

To all whom it may concern:

Be it known that I, J osEPHfPnrRELLI, a citizen of the 'United States, residing at New Haven, in the county of New Haven and State of Connecticut, have invented a new and useful Improvement in Reversing Mechanisms; and I do hereby declare the following, when taken in connection with. the accompanying drawings and the characters of reference marked thereon, to be a full, clear, and exact description of the same, and which said drawings constitute part of this specification, and represent, in

Figure 1 a view in vertical longitudinal section of a reversing mechanism constructed in accordance with my invention. Fig. 2 a detail view in side elevation showing the bearing head, the two driving gears carried thereby, the driven sleeve, and the driven gear fixed thereto, one of the driving gears being removed from its stud. Fig. 3 a detached view in side elevation. of the gearcase cover. Fig. 4 a view in side elevation of the friction disk. Fig. 5 a view in front elevation of my improved mechanism, with the gear-case removed. Fig. 6 a view in elevation of the gear-case looking into it or toward the engine, showing also the thrustfiange of the power-transmitting sleeve, the eccentric carried by the said flange and the bearing-stud of the said sleeve. Fig. 7 a detached view in side elevation of the gearcase. Fig. 8 a broken plan view of the friction-band. Fig. 9 a detached face-view of the friction-disk. Fig. 10 a detached view of the eccentric or ring.

My invention relates to an improved reversing mechanism for use in connection with the gasolene engines of power boats, automobiles, &c., the object being to produce a convenient, reliable and efi'ective device constructed with particular reference to compactness of form, fewness of gears, and to smoothness and quietness of operation.

With these ends in view my inventionconsists in a reversing mechanism having certain details of construction and combinations of parts as will be hereinafter described and pointed out in the claims.

In carrying out my invention as herein shown, I employ a sleeve 2 adapted to receive a power-transmitting shaft 2 which may be a part of the engine or any other source of power. The said sleeve 2 runs in a bushing 3 located in a hub 4 forming a part of a gear-case 5 which is formed upon its interior with a concentric recess 6 for the reception of a thrust-flange 7 located upon the inner end of the sleeve 2 and bearing upon a thrust-ring 8 located in the bottom of the said recess 6. The said sleeve 2 is furnished at its extreme inner end with a concentric bearing and centering stud 9 entering a socket 10 in the inner end of a driven sleeve 11 the outer end of which is formed with a corresponding socket 12 for the reception of the driven shaft 13 which is secured to the sleeve 11 by means of a set screw 14.

The thrust-fiange 7 is provided upon its inner face with an eccentric 15 encircled by an eccentric strap or ring 16 formed at its opposite ends with ears 1?, having perforations 18, respectively receiving crankpins 19, carried by the flanges 20 of two driving gears 21 respectively turning freely upon studs 22, mounted in a disk-like bearing head 23 which is applied to the open rear end of the gear'case 5 for which it forms the real closure. The said head 23 is provided in its edge with screw-holes 24 receiving long screws 25 employed to fasten the cover 26 to the gear-case, the bearing head 23 being interposed between the open rear end of'the gear case and the inner face of the cover 26. The driving gears 21 mesh into a driven gear 27 mounted upon the forward end of the sleeve 11 aforesaid which has bearing in the bearing-head23.

Between the bearing head 23 and the cover 26, I interpose a friction-disk 28 the forward face of which bears upon a raised friction face 29 formed upon the outer face of the head 23, the said disk being free to slide upon the sleeve but held against rotation thereupon by means of a key 28 The outer face of the said disk 28 is engaged by the inner faces of the flanged forward ends of three plungers 30 mounted in the cover 26 and engaged at their outer ends by the camlike forward ends of clutch-fingers 31 turning upon pivots 32 mounted in the radial ears of a ring 33 encircling the hub 34 of the cover 26. The said ring 33 is held against rotation by its provision with a notch 35 receiving a pin or feather 36 projecting from the cover 26, and held in place upon the hub 34 by means of a threaded collar 37 provided with set screws 38 engaged with the hub 34. The adjustment of tive; The said fingers 31 coact with a cone 39 loosely mounted on the driven shaft 13 on which it is free to revolve and to move longitudinally, the cone being mounted in the usual manner in an operating-handle 40 having its lower end connected by a pin 41 With the rear end of a fulcrum link 42 connected at its forward end to a friction band 43 which has two depending ears 44-44 receiving a pin 45 passing through the said forward end of the link 42, the said band forming a fulcrum for the operation of the handle 40. The said brake-band 43 encircles the rear portion of the gear-case 5, the head 23 and theforward portion of the cover 26,and is provided for its own operation With two upstanding lugs 46 and 47 located at its respective ends. These lugs afford a bearing for a rock-shaft 48 formed at one end with screw threads taking into corresponding threads in the lug 46 while its opposite end projects through the lug 47 and is formed with a flange or hub 49 carrying near its edge a screw. 50 held in place by a jam nut 51 and having its inner end rounded for co-action with a cam-surface 52 formed upon the outer face of the hub 47. The said rock shaft 48 has secured to it the lower end of a short lever 53 the upper end of which is connected by a pin 54 with the forward end of a link 55 the rear end of which is attached by a pin 56 to the operating handle 40.

Having now described the detailed construction of my improved reversing mechanism, I will set forth the mode of operating it. Supposing the engine, or other source of power, to be running and the operating-handle 40 to be in its intermediate position, there will be no transmission of power from the power-transmitting sleeve 2 to the propeller shaft 13, for the reason that the friction-disk 28 is not applied. Under these conditions the driving gears 21 will run idle at the speed of the sleeve 2 and power-shaft 2, and the driven gear will remain at rest. If now the handle 40 be pushed forward, the finger-cone 39 will immediately operate to spread the clutchfingers 31 apart, whereby the cam-like forward ends thereof will operate to push the 'p'lu'ngers 30 forward and hence force the friction-disk 28 forward against the friction face 29 of the bearing head 23, whereby the propeller shaft 13 and the power-transmitting sleeve 2 will be locked together for the reason that the friction-disk 28 is now frictionally held by the bearing-head 23 in addition to being keyed to the driven sleeve 11. On account of this frictional engagement between the bearing-head 23 and the friction-disk 28 they can no longer run idle as before, but must now turn together on a common axis. In this connection I may say that when the gears are running idle, as before explained, the power-shaft 2 and driven shaft 13 are free to be turned independently of each other, there being no driving connection between them. During this time the gear case 5 is free to turn inside of the brake-band 43. hen the handle 40 is pulled rearward, the finger-cone 39 is withdrawn from the clutch-fingers 31, thereby relieving the plungers 30 which in turn relieve the friction disk 28 which moves rearward and breaks its frictional engagement with the friction-head 23. The continued rearward movement of the handle 40 acts through the link 55 and short lever 53 to rock the screwshaft 48, whereby the screw 50 is forced to ride up the steep portion of the camsurface 52, with the result of drawing the lugs 46 and 47 together so as to clamp the band 43 upon the gear-case 5. This is what might be called the quick movement of the band. the final grip of the band upon the case being effected by the threading of the shaft 48 into the lug 46. f.

The gear-case 5 being thus held against rotation by the band 43, the power-transmitting sleeve 2 turns within it and causes the eccentric 15 to turn within the eccentric ring 16 and thus set up, so to speak, the reciprocal or crank-like motion of the eccentric ring 16 which is transmitted through the crank-pins 19 to the driving-gears 21 which are rotated and in turn rotate the driven gear 27 fixed upon the forward end of the driven sleeve 11 to which the driven shaft 13 is secured. I may add that there is no revolution of the ring 16 as a ring, although it bodily describes a circular path around the longitudinal axis of the entire mechanism. In other words, the eccentric ring without itself rotating, travels in the circular path required for the rotation of the driving gears 21 by the crank-pins 19. Under these circumstances the driven shaft 13 will rotate in the opposite direction from the power-transmitting sleeve 2 at a speed determined by the relative sizes of the driving and driven gears. As shown in the drawings, the teeth in the driving gears 21 and the driven gear 27 are as 2 to 3. But of course this proportion may be varied as found expedient. \Vhen the handle 40 is pushed forward into its intermediate position again, the link 55 will act through the short-lever 53 to rock the shaft 48 in the opposite direction, whereby the riding of the screw 50 down the steep pitch of the camsurface will effect the quick release of the band 43 from the gear case 5. From this time the mechanism will again run idle as already explained. It will be observed that no power is transmitted by the gears which only operate when the device is running idle.

I claim 1. In a reversing I'DGClltll'llSlTl, the combination with a power-transmitting member, of a gear-case loosely mounted upon the said power-transmitting member for rotation thereon, driving gears, crank-connection between the power-transmitting member and the said gears, whereby the same are rotated, a driven gear meshed into bythe driving gears, means for carrying the driving gears and means for holding the gear-case against rotation.

2. In a reversing mechanism, the combination with a power-transmitting member, of an eccentric carried thereby, a ring for the eccentric, driving gears connected with the eccentric ring for rotation thereby, a driven gear meshed into and driven by the driving gears, and a driven member carrying the driven gear and rotated thereby and means for holding the gear-case against rotation.

3. In a reversing mechanism, the combination with a power-transmitting member, of

a gear-case mounted thereupon, an eccentric carried by the said member, an eccentric ring operated by the eccentric, driving gears connected with and rotated by the said ring, a driven gear rotated by the driving gears, a driven member rotated by the said driven gear, a bearing head carrying the driving gears, forming a bearing for the driven mem- 1 her and secured to the gear-case, and friction mechanism for frictionally couphng the bearing-head and driven member.

4. In a reversing mechanism, the combination with a power-transmitting member, of I a gear-case mounted thereon, an eccentric carried by the said member, an eccentric ring operated by the eccentric, driving gears rotated by the said ring, a driven gear rotated by the driving gears, a driven member rotated by the driven gear, a bearing-head carrying the driving gears, and secured to the gear case, a friction-disk connected to the said driven member, plungers for forcing the said disk into frictional engagement with the bearing-head, a handle, and means for transmitting the movement of the handle to the plungers, whereby the friction-disk is frictionally coupled to the bearing-head, and the driven member locked to the power-transinitting member.

5; In a reversing mechanism, the combination with a gear-case, of a power-transmitting member mounted thereupon, driving gears, a crank-connection between the said member and gears, whereby the latter are rotated, a driven gear meshed into by the driving gears, a driven-member carrying the driven gear, a bearing head secured to the gear case and carrying the driving gears, a cover secured to the gear case, a friction disk interposed between the said cover and bearing head, means for operating the said friction-disk, and a friction band for holding the gear case against rotation.

6. In a reversing mechanism, the combination with a power-transmitting member, of a gearcase mounted thereupon, driving gears, crank-connection between the said member and gears, a driven gear meshed into by the driving gears, a driven member driven by the said driven gear, a bearing head secured to the gear case and carrying the driven ears, a cover secured to the gearcase, a friction disk interposed between the bearing head and cover and slidably but non-rotatably mounted upon the said driven member, means for operating the said friction disk, whereby it is frictionally engaged with the bearing-head, and means for holding the gear case against rotation.

In testimony whereof, I have signed this specification in the presence of two subscribmg witnesses.

JOSEPH PETRELLI. Witnesses:

CLARA L. WEED, GEORGE D. SEYMOUR.

Images