US1329269A - Locomotive transmission system - Google Patents

Description

a. M. mou. v LOCOMOTIVE TRANSMISSION SYSTEM.

'APPLICRTION HLEDSEPRII: Oll- WITNESSES: r INVENTOR George M. EaTon.

UNITED STATES PATENT OFFICE.

GEORGE M. EATON, OF PITTSBURGH, PENNSYLVANIA, ASSIGNOR TO WESTINGHOUSE ELECTRIC & MANUFACTURING COMPANY, A CORPORATION OF PENNSYLVANIA.

LOOOMOTIVE TRANSMISSION SYSTEM.

Specification of Letters Patent.

Patented Jan. 27, 1920.

Application filed September 2'? 1916. Serial No. 122,393.

To all whom it may concern:

Be it known that I, (inonen M. EATON, a citizen of the United States, and a resident of Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Locomotive Transmission Systems, of which the following is a specification.

My invention relates to locomotives and particularly to the driving connections between the propelling motors and the driving wheels.

One object of my invention is to provide a locomotive having a high center of gravity. a driving connection between the propelling motor and the driving wheels which shall provide a bearing on each side of the gear wheels contained therein, and which shall permit each truck to have a relatively short wheel base.

Another object of my invention is to provide a locomotive of the above indicated character that shall be provided with a driving connection between the motors and the various driving wheels, which shall obviate to a material degree the trouble resulting from the changes of center of the jack shaft in its bearings, which are chiefly caused by the connecting rod stresses applied on the bearings.

A further object of my invention is to provide a locomotive having a driving connec tion of the above indicated character which shall be located in the vertical central plantof the locomotive and which shall resiliently transmit the driving effort of the motors to the various driving wheels.

More specifically, my invention comprises a locomotive having a number of trucks, each embodying two axles having driving wheels mounted thereon, and side frames mounted on said axles. A motor, comprising a frame, two armature shafts and four armatures, is mounted on said side frames. A pinion is mounted centrally on each armature shaft, a bearing is located on each side of the pinion and an armature is disposed adjacent to each end of each shaft. A jack shaft having a gear wheel meshing with the motor pinions is suspended from the motor frame by means comprising bearings, one bearing being disposed on each side of said jack-shaft gear wheel. Between each of said axles and the jack-shaft gear wheel is disposed a flexible connection com- Zontal line,

prising a spider mounted on the axle midway between the driving Wheels and two quill members which surround the spider and which have teeth meshing with the teeth on said jack-shaft gear wheel. The quill members are supported by projections extend ing from the motor frame and are joined to the spider by a resilient means.

In the accompanying drawing, Figure 1 is a partial view of a locomotive constructed in accordance with my invention; Figs. 2 and 3 are partial sectional views along the lines AA and BB, of the locomotive illustrated in Fig. 1; and Fig. 4 is a detail view of the motors illustrated in Fig. 1.

Referring to the accompanying drawing and particularly to Fig. 1, a locomotive 1 is illustrated. comprising a body portion 2. outer trucks 3, one only of which is illustrated, guiding trucks 4 which are pivoted to the outer trucks 3 and one only of which is illustrated, and inner trucks 5. The inner and outer trucks 5 and 3 are connected together by means of the articulated connections 6, and the cab or body portion 2 is conneoted to the inner trucks 5 by means of the pivotal connections 7.

As the inner and outer trucks 5 and 3 are substantially similar in construction, one truck only will be described in detail, namely truck 3. The outer truck 3 comprises two axles 8 having driving wheels 9 mounted thereon, side frames 10 which are supported on the axles 8, and a twin motor 11 which is bolted to the side frames 10. A jack shaft 12 having a gear wheel 13 rigidly mounted thereon, is supported on the frame 14 of the motor 11.

The twin motors 11 embody armature shafts 15, each of which has a pinion 16 mounted thereon midway'between the ends thereof and between bearings 17. Adjacent to the bearings 17 near the ends of the shaft 15 armatures 18 are mounted. Two arms 19 project vertically downward from the motor frame 14 and are adapted to support the jack shaft 12 by means of bearings 20. The bearings 20 are preferably split on a horias illustrated in Fig. 1 of the drawing, and embody caps 21 and bearing brasses 22. When the jack shaft; 12 [is mounted in position on the arms 19 projecting from the motor frame 12 the'gear wheel 13 mounted thereon me with the two pinions 16 of the meter 1 1E I:

Resilient driving connections 23 are proricged between the jack-shaft gear wheel 13 an each of the axles 8. Each resilient driving connection embodies a spider 2 4 rigidly mounted on the axle 8 and two uill mom-- bers 25 having teeth 26 which mes 1 with the te E; of he ck-shaft gear wheel. The qui mem ers 5 and the spider 2e are resiliently connected together by means of s rings 27 in a manner described in my latt No. 9375991 issued October 19, 1909. The quill members 25 are supported from the motor frame 14 by means of arms 28 111 a manner similar to the supporting of the jack shaft 12 by means of the arms 19. The quill members 25 are supported on hearings in the arms 28, which are similar to the bearings for the jack shaft 12. Care must be exercised, however, to maintain clearance between the axle 8 and the quill members 25. The bearings for the quill members are split along a horizontal line as indicated in Fig. 1 of the drawing and are provided with hearing brasses Q9.

F mm the above description it may be noted that each truck of the locomotive is provided with a resilient driving connection between the propelling motor and the axles thereof, which is located in a vertical cen tral plane of the locomotive and that each gear wheel associated with the driving connection has a bearing on each side thereof.

I do not wish to be restricted to the specific construction or arrangement of parts herein set forth, as various modification's thereof may be effected Without departing from the spirit and scope of my inventicn, I desire, therefore, that onl such limitations shall be imposed as are in icated in the appended claims.

I claim as my invention 1. In an electric vehicle, two axles having driving wheels mounted thereon, a 'ack shaft disposed between said axles and avin agear Wheel mounted thereon, two yieldalile niving connections meshing with said gear wheel, the driving connections being connected to said axles and the gear wheel on said jack 'shait, and means for operating the. gear wheel mounted on said jack shaft to; epenatc the driving wheels.

8. In an electric vehicle, two axles having driving wheels mounted thereon, a jack shailit disposed between said axles and having a gear wheel mounted thereon and disposed in the central vertical plane of the vehicle, two. yioldable drivin connections meshing with said get? whee and respectlvely mounted on said axles, said driving connections connected to said axl In a plane midway between the driving wheels, and means tor; c retmg the gear wheelmmtcdscn the] shatt to operate 5, In some salads, the

with two driving axles having driving wheels mounted thereon, and a resilient driving connection attached to each axle midway between the drivng wheels, of a jack shaft disposed between said axles, a gear wheel mounted on said jack shaft and meshing with said driving connections, and means in mesh with the jack-shaft gear Wheel for rotating the same.

4. In an electric vehicle, the combination with two axles having driving wheels mounted thereon, and a resilient driving connection associated with each of said axles, of a jack shaft disposed between said axles, and a gear wheel on said jack shaft meshing with said resilient driving connections.

5. In an electric vehicle, the combination with two axles having driving Wheels mounted thereon, a driving connection as sociated with each of said axles, and a jack shaft disposed between said axles and having a gear wheel mounted thereon, said jack-shaft gear wheel meshing with said driving connections, of a motor for operating the jack shaft gear wheel and comprising two armature shafts, pinions mounted on each of said armature shafts near the center thereof and overhung armaturos disposed near the end of the shafts.

6. In an electric locomotive, the combination with two axles having driving wheels mounted thereon, and a jack shaft disposed between said axles, of a motor, and a set of gear wheels tor connecting said motor to the jack shaft and the driving axles, each of said gear wheels being disposed in the central vertical plane of the locomotive between supporting bearings.

7. In an electric locomotive, the combination with an axle having driving wheels mounted thereon, and a propelling motor, of means comprising a flexible connection for transmitting the driving effort of the motor to the driving wheels, said flexible connection being disposed in the central vertical plane of the locomotive.

8. In a locomotive, the combination with :fair of axles having driving wheels mountthereon, side frames mounted on said axles, a motor having the frame thereof mounted on said side frames, a jack shaft disposed between said axles and having a gear wheel mounted thereon, a hearin for said jack shaft disposed on each si e of said Jack-shaft gear wheel, said bearings being supported by the motor frame, of resilient means for transmihtin the driving elfort of said motor through said jack-shaft gear wheel and said axles to the driving wheels.

9, In an electric locomotive, the combineticn with two axles having driving wheels mounted thereon, and a jack shaft dis osed between and sales, at i meteo s s t gear ing a flexible drive wheels for connecting said motor to the jack shaft and the driving axles, and bearings disposed on both sides of each of said gear wheels, all of said gear wheels being dis osed in the central vertical plane of the ocomotive.

10. In an electric locomotive, the combination with an axle having driving wheels and side frames mounted thereon, and an electric motor mounted on said side frames, of means for transmittin the drivin effort of the motor to the riving whee s, said means comprising a flexible drive disposed midway between said driving wheels, said flexible drive comprising a spider mounted on said axle and two uill members surrounding the spider, an means for su porting said quill member from said motor rame 11. In an electric locomotive, the combination with an axle having driving wheels mounted thereon, and a propelling motor having a supporting frame, of means for transmitting the driving effort of said motor to the driving wheels, said means compriscomposed of a spider mounted on said axle midway between the driving wheel and two quill members sur rounding the spider, and means for supporting the quill members from said motor frame adjacent to said spider.

12. In a locomotive, the combination with a pair of axles having driving wheels mounted thereon, a jack shaft disposed between said axles, a motor having a frame means projecting from said motor,frame for supporting said jack shaft, a gear wheel mounted on said jack shaft, and pinions for transmitting the driving efi'ort of said motor to said jack-shaft gear wheel, of a flexible drive associated with each of said axles and adapted to transmit the driving effort of the motors from the jack-shaft gear wheel to the driving wheels, each of said flexible drives comprising a spider attached to the shaft and quill members supported by said motor.

In an electric locomotive, the combination with a pair of driving axles having driving wheels mounted thereon, of propelling means comprising a air of para lel armature shafts, an armature at each end of each of said shafts, bearings for sup armature shaft at two places etween the armatures thereon, a pinion on each armature shaft between its bearing supports, a jack shaft between the driving axles and below the ropelling means, a gear on said jack sha meshing with the two pinions on said armature shafts, and gearin connecting said jack-shaft gear to sai driving axles, all of said gearing between said propelling means and axles being located in the central vertical plane of the locomotive.

In testimony whereof I have hereunto subscribed my name this 25th day of Sept,

GEORGE M. EATON.

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