US1719935A - Speed reducer and the like - Google Patents

Description

. July 9, 1929.

- w. G. JONES ET AL SPEED REDUCER AND THE LIKE Filed'Aug 16, 1924 3 Sheets-Sheet 1 I fizz/ 72f0719," Warren Gkfowes y 9, 9 w. a. JONES ETAL 1,719,935

I SPEED REDUCER AND THE LIKE Filed Aug. 16, 1924' S Sheets-Sheet 2 y 9? w. G. JONES ET AL. .719.935

SPEED REDUCER AND THE LIKE Filed Aug. 16, 1924 3 Sheets-Sheet 5 Patented July 9, 1929.

UNITED STATES PATENT OFFICE.

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SPEED REDUGER AND THE LIKE.

Application filed August 16, 1924. Serial No. 732,524.

This invention has to do with innntovements in speed reducers and the like. More particularly it has to do with in'iprovements in gear speed reducers in which the gearing is so arranged that the power delivered by the driving shaft at one speed. is transferred to the driven shaft and delivered thereby at a reduced speed.

More particularly the present invention relates to an improved connection for de livering power from the driven shaft to the external mechanism. In many cases the power delivered by the driven shaft to be take off therefrom by a train of gearing. In G. such case the gearing element on the driven shaft located outside of the speed reducer itself causes side thrusts to be exerted on the bearing of the driven shaft.

The main object of the present invention is to provide an outboard bearing construction for giving additional support to the driven shaft and so as to better carry the aforesaid side thrusts and give the driven shaft the needed additional support. In this connection the aforesaid outboard bearing also serves to support the driven shaft at a position beyond the gear elementthereon, so that it is supported at both sides of said gear element.

A further object of the invention is to providc a unit bearing element which can be readily attached to or removed from the end. portion of the casing itself. This outboard. bearing element is also so constructed that it can be readily applied to gear speed reducers of standard construe/tiens which are well known in the art and in very eziztendcd use at this time.

In connection with the above, a further ohject is to provide an outboard bearing unit of such construction that it can be turnedinto differentpositions with respect to the axis of the casing; of the gear speed reducer itself. This will. make it possible to cause the opening of the (ultbmlrd hearingunit to face in any desired direction around a circle, so that the connectitm to the train of gears can be established from the speed reducer in any desired direction.

Other objects and uses of the invention will appear from a detailed description of the same, which consists in the features of I to the outboard bearing unit;

Fig. 41: shows a view at right an glee to that i of: Fig. 2; and

Fig. 5 shows a fragmentary view of the end of a gear speed reducer having one of the outboard bearing units applied thereto,

but rotated at 180 with respect to the position indicated in Figs. 1 and 3.

For nirposes of convenience, the features of the present invention are herein shown as applied to a gear speed reducer of a specific construction. This is done by way of illustration and not as a matter of limitation, on cept as we may limit ourselves in the claim.

Bearing the above inmind, the particular speed reducer unit indicated includes a cylindrical barrelshaped casing 6 having; its ends recessed, as shown at 7 and 8, to accommodate the end heads 9 and 10 respectively. The high. speed shaft .11, usually the ('lri'ving shaft is journaled in the end head 9 at the point 12 and carries the pinion 1?) at its inner end. The low speed shaft 14; is journaled in the other end head 10 by the hear-- ing 15 and arries at its inner end a gear 16. One or more back driving shafts 17 are journalcd in the end heads 9 and 10 by the bearii' 18 and 19 respectively. Each of these back shafts 17 carries a gear 20 1ncching with the pinion 18 and a pinion 21 meshing with the gear 16. As a consequence, the speed is reducedv between the shafts 11 and 14k. At the same time by plac-i inn" a nmuber of the baclcshafts 17 around the device, each. one being n'operly geared to the pinion 13 and gear 16, the side thrusts due to the speed reducer gears are eliminated and the driven shaft is driven without side thrusts.

At the low speed end of the device is supported at both sides of said gear.

alaced the outboard bearing unit'22. The fame preferably includes a circular end flange 23 of proper size to seat around the flat peripheral portion 24 of the low speed end head 10, as clearly indicated in Fig. 1. The. same tap screws 25 which are used for holding the end head 10 in place may also advantageously be used for securing the outboard bearing unit 22 in place, though this is optional.

The outer portion of the unit 22 carries a bearing 26 which receives the end of the low speed shaft 14 and supports the same in a very firm manner. Preferably the outboard bearing unit is of generally cup shape, as

- shown in several of the figures, so that when turned into position where. its open side faces upwardly it may be either wholly or partially filled with oil. It may also be reinforced with a number of radial ribs 27, if

desired.

The gear 28 is mounted on the low speed shaft 14 intermediate between the bearings 15 and 26, so that the driven shaft is firmly Preferably the outboard bearing unit is open along one side, as indicated in Fig. 4 in particular, so as to expose the relatively large opening 29. Ordinarily, this opening will be sufficiently deep and so shaped as to allow a portion of the gear 28 to project beyond the outboard bearing unit, as clearly indicated in Fig. 3. This will facilitate the application of the train of gears thereto.

'In some cases it may be desired to allow for a free circulation of air through the out board-bearing unit. When this is the case an opening 3Q'may be formed in its lower portion, as shown in Fig. 1, but in many cases it will be found desirable to provide for the retention ofoil within the lower portion ofthe device, in which case the presence of the opening 30 should be dispensed w th or said opening sealed.

Manifestly, the outboard bearing unit can be turned into any desired direction when applied to the end of the speed reducer. For example, its open side may be made to face downwardly, as indicated in Fig. 5, or in any other direction.

lVhile we have herein shown and described only a single embodiment of the features of our present invention, still we do not intend to limit ourselves to the same, except as we may do so in the claim.

e claim:

The combination with a circular end head of the casing of a gear speed reducer intended for permanent location and attachment to a structure, said casing having a series of equally spaced securing bolts holding said end head in place, and the driven shaft projecting from said end head, of a segmental outboard bearing element in conjunction with said end head and intended for attachment thereto at different positions of angular adjustment thereon, with the outboard bearing in line with the driven shaft aforesaid, said outboard bearing element having a circular outwardly projecting flange at its attaching end adapted to seat against the peripheral portion at the end head of the casing aforesaid, said flange being perforated at equally spaced positions corresponding to the spacing of the securing bolts aforesaid, said bearing of the outboard bearing element being adapted to receive the end portion of the driven shaft, and a. gear element on the driven shaft intermediate between the end head and outboard bearing substantially as described.

VARREN G. JONES. FREDERICK H. HOGE.

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