US2425815A

US2425815A - Reversible gearing

Info

Publication number: US2425815A
Application number: US526731A
Authority: US
Inventors: John N Lavery
Original assignee: Individual
Current assignee: Individual
Priority date: 1944-03-16
Filing date: 1944-03-16
Publication date: 1947-08-19
Anticipated expiration: 1964-08-19

Description

Aug. 19, 1947.

J. N. LAVERY REVERSIBLE GEARING Filed March 16-, 1944 5 Shuts-Sheet 1 Aug. 1947. J. N. LAVERY 2,425,815

' REVERSIBLE GEARING F il ed larch 16, 1944 5 Sheets-Sheet 2 Inventpr cfOZ/l' AZ 1 4 Veg Aug. 19, 1947. J. N. ILAVERY 2,425,315

v REVERSIBLE GEARING Filed uarn 16; 1944 s She ets-Sheet a Aug. 19, 1947. J. N. LAVERY 2,425,815

REVERSIIBLE GEARING Filgd-March 1a, 1944 5 Sheets-Sheet 4 2 JZ/ii/Mlawg @Maoib-L Aug.,19, 1947. .1. N..LAVERY REVERSIBLE GEARING Fild March 16, 1944 5 Sheets-Sheet 5 Inventor %/z /l I a l/e 6 ink Wyn; HM fj Patented Aug. 19, 1947 UNITED STATES PATENT OFFICE 2 Claims.

This invention relates to reversible gears of a generally similar nature to that constituting the subject matter of my United States Patent No. 1,257,253, issued February 19, 1918, upon which the present device constitutes an improvement.

The primary object of the invention is to provide, in a reversible gear of the aforementioned character comprising a constantly running drive shaft and a loosely mounted pulley, novel means for connecting said pulley to said drive shaft for actuation thereby in either direction.

Other objects of the invention are to provide a reversible gear of the character described which will be comparatively simple in construction, strong, durable, highly efficient and reliable in use, compact and which may be manufactured at low cost.

All of the foregoing, and still further objects and advantages of the invention, will become apparent from a study of the following specification, taken in connection with the accompanying drawings wherein like characters of reference designate corresponding parts throughout the several views, and wherein:

Figure 1 is a view in end elevation of a reversible gear constructed in accordance with the present invention, showing the drive shaft in cross section.

Figure 2 is a top plan view of the device.

Figure 3 is a View in vertical longitudinal section through the gear.

Figure 4 is a view in transverse section, taken substantially on the line 44 of Figure 2.

Figure 5 is a View in transverse section, taken substantially on the line 5-5 of Figure 3.

Figure 6 is a fragmentary view in section through the front portion of the device, showing the operating means for the clutch shoes.

Figure 7 is a view in transverse section, taken substantially on the line 'l'! of Figure 2.

Referring now to the drawings in detail, it will be seen that the embodiment of the present invention which has been illustrated comprises a stationary tube l which is to be firmly secured in any desired manner on a suitable support. On one end of the tube I is a stationary flange 2. Mounted on the flange 2 adjacent its periphery are stub shafts 3. Pinion gears 4 are journaled on the shafts 3.

Loosely mounted on the stationary tube l is a pulley which is designated generally by reference character 5. The pulley 5 includes a plate 6 which is journaled on the stationary tube I, said plate carrying, on its periphery, a rim 1 which encircles the flange 2 and the pinion gears 4 thereon. The

pulley 5 is to have trained thereon an endless power transmission belt. Formed in the rim 1 of the pulley 5 is an integral ring gear 8 which is in mesh with the pinion gears 4.

A drive shaft 9, from any suitable source of supply, extends through the pulley 5 and has one end portion journaled in the tube l. Rotatably mounted on the shaft 9, within the pulley 5, is a drum Ill. The drum I0 is spaced concentrically from the rim 1 of the pulley 5. As best seen in Figure 3 of the drawings, the drum It includes a hub H which, in the embodiment shown, has mounted therein a bushing 12 and a bearing l3, said bearing being journaled on the shaft 9. A screw l4 secures the members [2 and H3 in position in the hub H. A gear wheel I5 on one end portion of the hub l l is engaged with the pinion gears 4. A grease retainer I6 is provided between the drum l0 and the gears 4, 8 and I5.

Fixed on the shaft 9 adjacent the drum I8 is a disc l1. Mounted on the disc ll, adjacent the periphery thereof, are pins [8 which project into the pulley 5. Friction clutch shoes H! are operable radially on the pins [8 between the drum [0 and the rim 1 of the pulley 5. Radial slots 2|] in the shoes I9 accommodate the pins l8.

Shafts 2| are journaled in the disc IT at diametrically opposite points. Fixed on one end portion of the shafts 2| for operation between the ends of the shoes l9 are discs 22. Links 23 connect the shoes l9 to the discs 22 for actuation toward or away from each other thereby.

Mounted on the outer side of the disc I! are pairs of brackets 24. Pivotally mounted between each pair of brackets 24 is a bell crank lever 25. Angular rods 26 operatively connect the bell crank levers 25, at one end, to arms 21 on the shafts 2|.

A collar 28 is slidable on the shaft 9. Arms 29 are fixed on one end of the collar 28. The arms 29 are pivotally connected to the adjacent end portions of the bell crank levers 25. A ring 30 is rotatably mounted on the collar 28. An operating lever 3| for the collar 28 is operatively connected to the ring 30.

It is'thought that the operation of the device will be readily apparent from a consideration of the foregoing. .Briefly, when the shoes 19 are out of contact with the drum In and the rim 1 of the pulley 5, the gear is in what may be considered neutral position. With the gear in neutral position, the pulley 5 is free of the shaft 9. To drive the pulley 5 in one direction, the collar 28 is shifted away from the disc H on the drive shaft 9, thus rotating the discs 22 in a direction to expand the shoes 19 into engagement with the rim 1 of the pulley 5. It will accordingly be seen that a direct drive is had from the shaft through the disc I! and the shoes Is to the pulley for turning said pulley in the same direction as that in which said shaft is rotating. Vfhen it is desired to reverse the pulley 5 relative to the shaft 9, the collar 28 is shifted toward the disc E 1 thereby contracting the shoes l9 and frictionally engaging said shoes with the drum l0. Thus, the drum is and the gear wheel iii are connected to the shaft 0 for rotation with said shaft. The gear wheel actuates the pinion gears 4 which, through the ring gear 8, drive the pulley 5 in the opposite direction.

It is believed that the many advantages of a reversible gear constructed in accordance with the present invention will be readily understood, and although a preferred embodiment of the device is as illustrated and described, it is to be understood that changes in the details of construction and in the combination and arrangement of parts may be resorted to which will fall within the scope of the invention as claimed.

What is claimed is:

l. A device of the character described including a drive shaft, a fixed tube surrounding said shaft formed with an annular flange, stub shafts supported by said flange, gears on said shafts, a pulley having a hub loosely mounted on said tube, a ring gear on the inner surface of said pulley engageable with said gears a bearing collar journaled on said shaft, a bushing surrounding said collar, a hub secured to said bushing and collar supporting a clutch drum at one end and a gear at its opposite end engageable with the gears on the stub shafts, a plate secured to said drive shaft, radially adjustable clutch shoes supported on said plate, and a slidable operating means for selectively causing the frictional engagement of said clutch shoes with said drum and with said pulley for effecting the rotation of said pulley in either direction.

2. A device of the character described including a drive shaft, a fixed tube surrounding said shaft formed with an annular flange, stub shafts supported by said flange, gears on said shafts, a pulley having a hub loosely mounted on said tube, a ring gear on the inner surface of said pulley engageable with said gears, a bearing collar journaled on said shaft, a bushing surrounding said collar, a hub secured to said bushing and collar supporting a clutch drum at one end and a gear at its opposite end engageable with the gears on the stub shafts, a plate secured to said drive shaft, radially adjustable clutch shoes supported on said plate, slidable operating means for selectively causing the frictional engagement of said clutch shoes with said drum and with said pulley for effecting the rotation of said pulley in either direction, and a grease retaining plate mounted on said last mentioned hub separating said drum from said gearing.

J OHN N. LAVERY.

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

UNITED STATES PATENTS Number Name Date 1,257,253 Lavery Feb. 19, 1918 443,259 Pedersen Dec. 23, 1890 1,946,849 Golliner Feb. 13, 1934 1,038,033 Walther Sept. 10, 1912 808,309 Ricks et al Dec. 26, 1905 1,394,131 Wollesen Oct. 18, 1921 2,184,135 Batten Dec. 19, 1939 2,067,685 Schaper Jan. 12, 1937 2,057,559 De Backer Oct. 13, 1936 FOREIGN PATENTS Number Country Date 673,778 France Jan. 20, 1930