US1223259A

US1223259A - Planetary speed-reducing mechanism.

Info

Publication number: US1223259A
Application number: US6909115A
Authority: US
Inventors: George Cottam
Original assignee: Individual
Current assignee: Individual
Priority date: 1915-12-28
Filing date: 1915-12-28
Publication date: 1917-04-17
Anticipated expiration: 1934-04-17

Description

P. H. COLT.

FOLDING COOP AND CRIB.

APPLICATION FILED MAY I1. 191e.

Patented Apr. 17, 1917.

2 SHEETS-SHEET 2.

aumen-I PLANETARY SPEED REDUCING vMECHANISNI.

APgLlcATloN FILED Dc.28. 1915.

2 SHEETS-SHEET 2.

Patented Apr. 17, 1917.

'UNITED STATES PATENT oFrIoE. .l vanonce corran, or sae1nA-w, m1crr1enn. l

To all whom z't may concern.' Be it known that I2 GEORGE Correnti; citizen of England, reslding at Saginaw, 1n

i the county of Saginaw and State of Michiwith a driving member and a driven member, of speed reducing elements therebetween ,and means for imparting planetary movement to the speed reducing elements including -means for fixing the relationship of said planetary means with respect to the operatmg means. j

One of the characteristic features of my apparatus vis the provision for interchan g the gear members whereby it is possib e to obtain a reduced speed movement of the driven member in the direction of movement of the'driving member, or in the reverse direction, depending upon the utilization of j power taken from the prime mover.

These and such other objects as may hereinafter appear are attained by the novel construction, combination and arrangement of 4parts tolbe hereinafter yspecifically described and claimed. Reference will now be had to the accompanying drawings forming a part 'of this specification, wherein Figure 1 is a perspective view of an embodiment o f this invention.

Fig. 2 is a vertical sectional view taken about on the plane indicated by the line 2-2 of Fig. 1. x

Fig. 3 is a vertical sectional view onthe line 3-'3 of Fig. 2. v

Fig: 4 .is a perspective view of a bushing used in this construction.

Fi 5 is a perspective view of a spacing 'mem er for the gear frame.

Figs. 6 and 7 are sectional views on the lines 6-6 and 7-7 respectively of Fig. 2;

Speeication of Letters Patent.

Patented Apr. 17, 1917.

Application inea December as, 1915. serial No. 69,091.

and Fig. 8 is a vertical sectional view of a modiiication of the device.

Referring vto the drawin 'and specifically describing my apparatus, t e numeral 1 des. ignates a high speed driving shaft which is operatively connected to a rime mover of any desired type (not shown This shaft is journaled in one side of a casing 2 and extends into said casing as shown most clearly in Fig. 2 of the drawing. On the inner end of the shaft 1 is fixed the driving pinion 3 which is arranged substantially centrally of the casing before mentioned. At the opposite side of the casing is 'ournaled the driven lelement consisting of t e shaft 4 which ,is designed to vbe driven at reduced speed by means to be more clearly set forth as this description proceeds. The shaft 4 is coaxial with the shaft 1 and carries at its inner end the driven gear 5 detachably connected to the end of its shaft by suitable fastening means 6. It will be noted that the driving and driven members are arranged end to end and they are operatively connected by transmissiongear members now to be dej scribed.

Within the casing 2 is arranged a revoluble frame comprising the side plates 7 disposed in spaced relation and held in such spaced relation bymeans of the spacing' blocks or members 8, one of which is clearly disclosed in Fig. 5 of the "drawing The spacing elements are provided with lateral pins or projections 9 which enga e with the side .plates 7. Meshing with t ev driving pinion 3 are relatively large gear membersv l0y keyed upon the shafts 11. Upon the shafts 11 at one side of the gears 10 are smaller gear members 12. These gears mesh with a-relatively stationary planetary gear 13 which corresponds in size to the gears 10. The stationary gear member' 13 is detacha'bly'connected by means of fastening members 14 to the inner end of a lateral extension or sleeve 15, said sleeve constituting the bearing for the driving shaft 1 and being supported by the lateral journal support 16 projecting from the casin 2. The sleeve 15v is provided with a suita le bushing 17 for the shaft 1 and said sleeve is designed to be held in fixed relation byclamping meansv cooperating with the journal support 16, said that upon actuation of the driving sha Y clamping'means compl'isingthe cap" 18 reA` -movably attached to said suiport by fastening members or bolts 19. n the shafts 11 at the opposite side of the glear members 10 are disposed gears 20 Whic are smaller in size than the gear members 10 but slightly larger in diameter than the opposite gears 12, and these ears 20 mesh with the driven gear 5 on the riven shaft 4.

It will be understood that the driven gear is of smaller diameter or gear ratio than the relatively stationary or planetary gear 13. From `this construction it will'be appaent t its pinion 3 will drive the` larger gears 10 and -owing to the operative connection of their respective shafts with the planetary gear 13 through the'gear members which these shafts 11 are journaled will be caused to walk around the planetary gear 13. It follows from the fact that the gears 20 are larger than the gears 12 and the driven gear 5 is of a smaller pitch diameter than the planetary gear 13 that a very slow speed is im arted tothe driven gear -and its driven sha t 4. A. very great reduction in speed may be obtained by properly proportionin these gear members.

In t eembodiment of the invention shown in Fig. 2 it may be assumed for purposes of illustration that the driving gear 3 has fiflteen teeth; the gear 10, forty-veteeth; the

gear 12, similar in size to the driving pinion 3, fifteen teeth; and the planetary gear 13,

similar in size to the gear 10, forty-five teeth. If then the gear 20 is provided with sixteen teeth, the driven gear 5 will be moved the distance of three teeth for each revolution of'the frame about the"driving pinion 3 so that with a prime mover operating at fourteen hundred revolutions a minute, a movement of substantially twelve and one-half revolutions per minute will .be imparted to the driven shaft 4.' This movement imparted to the driven gear in the relation of the gear members disclosed in Fig. 3 will be in the same direction as the driving shaft 1.

Further describing the details of construction of this apparatus, it will be noted that each of the shafts 11 is provided with suitable bushings 21 at each end, one of said bushings being shown in Fig. 4 of the drawing, from which it will be observed that each is provided with a transverse groove 22 with which a pin 23 mounted in the side plate of the frame engages to hold the bushing in place. All of the gears on these shafts are keyed by a common key and may be readily removed by displacement of the bushings andthe said key whenever desired. e

The` casing 2 in which the transmission mechanism hereinbefore described is mounted is provided with a cover held in place 12, the frame 1n` by means of fastening' means or bolts 25. This cover has connected thereto at its topmost portion an I-bolt 26 by means of which the cover is lifted when detached from the casing.

The driven shaft 4 is journaled similarly to the driving .shaft 1 upon a bearing extension 16 and said extension is provided with a detachable cap 18, between which parts is arranged a suitable bushing 17 for the shaft. In apparatus of high speed operations of this character it becomes necessary to -renew the bushings for the operating parts and it will be obvious from this fdescription that said bushings may be readily replaced by reason of the detachability of the retaining members therefor.

The casing 2 is designed to hold a lubricant and the bearings are all provided with suitable feed passages so'that the rotating parts may be Veffectively lubricated. The

bearings for the driving andl driven shafts l have conduits 27 communicating therewith leading from the upper portion of the casing 2, and excess lubricant is returned to the casing by the lower conduits 28 leading from the outer end of the bearing extensions to the lower portion of the casing.

In Fig. 8 is shown a slightly modified form of the apparatus in that a train ofthe transmission gears is dispensed with. In other words, the driven shaft 4a in this form of the apparatus has secured to its inner end `the plate or disk 5a constituting one of the side members of the inner frame spaced from its opposite side member 7a by means of the interposed blocks 8a. Secured upon the axes 11, detachably connected to the disk 5, are the gear members 10 and thegear members 12 meshing with the relatively stationary gear 13. The remaining structure of this form is substantially identical with the preferred form and need not be further described. It will be obvious to those skilled in the art to which the apparatus appertains that this simplified construction may be utilized where the speed is to be proportionately changed.-

Reverting to the preferred construction it will also be obvious that a reverse movement at reduced speed may be imparted to the driven shaft by an interchange of the transmission gears. In other words the gear member 3 may be replaced by the gear member-5 and the intermeshing gears 12 and 20 accordingly interchanged. With the interchangeability of parts such as just described, the utility of my apparatus will begreatly enhanced inasmuch as it may be employed to operate mechanisms in either' of two directions, that is, forwardly or reversely, as may be found requisite in respect to the work to be performed.

Having thus described the invention, what is claimed as new is:-

1. A planetary speed changing mechanism consisting of a driving member, a driven member associated therewith, speed reducing means intermediate the driving and driven members, -a relatively stationary element with which the speed reducing means A coperate to produce planetary movement ment stationary.

consisting of a gear member having a lateral extension, a bearing supporting said eX- tension, and means coacti-ng with the bearing and clamping the extension to hold said gear member relatively fixed.

2. In combination, a casing, a drivingother side on the driven member, a relatively l stationary gear element operatively connected to the driving member, and clamping means coperating with the bearing for the driving member and holding said gear ele- 3. Speedl reducing mechanism of the class described comprising a .'lrivingy shaft, ay

driven shaft, a gear member carrled by said driven shaft, gearing intermediate the said gear member and the driving shaft, and a relatively stationary planetary gear of different diameter and interchangeable with the gear on the driven shaft whereby to provide for driving the latter in the same or reverse directions with respect to the driving shaft. k, 4. Speed reducing mechanism of the class described comprising a driving member, a driven gear, a relatively stationary gear, transmission -gears intermediate the driving member and the aforesaid drivenl and stationary gears, all of said gear members be'- ing removably arrangedA for interchanging positions to obtain different directions of movement of the driven element.

5. Speed reducing mechanism ofthe class described comprising a driving shaft, a driving pinion carried thereby, relatively large gear members meshing with said driving pinion, supporting -means for said gear members, a stationary gear member meshing with the last mentioned gear elements operatively connected to the supports therefor,l a driven shaft, and a driven gear detachably -connected thereto and of relatively smaller 'gear diameter than the stationary gear member aforesaid and operatively connected' to thesupports for the first mentioned gear' elements,.the stationary gear member being I detachable for interchange with the driven gear member.

In testimony whereof I aiix my slgnature.

GEORGE cori-AM.