US1007756A

US1007756A - Change-speed and reversing gearing.

Info

Publication number: US1007756A
Application number: US61383711A
Authority: US
Inventors: William John Vincent
Original assignee: ROTOPLUNGE PUMP Co Ltd
Current assignee: ROTOPLUNGE PUMP COMPANY Ltd; ROTOPLUNGE PUMP Co Ltd
Priority date: 1911-03-11
Filing date: 1911-03-11
Publication date: 1911-11-07
Anticipated expiration: 1928-11-07

Description

W. J. VINCENT.

CHANGE SPEED AND nnvnnsmo emnmu.

APPLICATION FILED MAR.11,1911.

Patented Nov. 7, 1911.

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W. J. VINCENT. CHANGE SPEED AND REVBRSING GEARING.

APPLIUA'IION FILED MAR. 11, Hill Loumhm I'LANUUIQRI'II cu. WASIIINOTDN- n, :4

UNITED STATES PATENT OFFICE.

WILLIAM JOHN VINCENT, 0F CARDIFF, E

PUMP COMPANY, LIMITED, 0

NGLAND, ASSIGNOR' TO THE RO'I'OPLUNGE F CARDIFF, WALES, ENGLAND.

CI-IANGE-SPEED AND REVERSING GEARING.

T 0 all whom it may concern:

Be it known that I, \VILLIAM JOHN V IN- CENT, a subject of the King of Great Britain, residing at Albert Chambers, High street, Cardiff, ales, England, have invented new and useful Improvements in Change-Speed and Reversing Gearing, of which the following is a specification.

This invention relates to a certain combination of a hydraulic clutch with reversing epicyclic gearing for the purpose of obtaining an infinite number of speeds in either direction. The hydraulic clutch consists as is usual of a rotary pump delivering liquid to its own suction through a regulating valve. According to this invention the driving shaft is connected to one of the members of the pump and also has fixed to it one of the elements of the epicyclic train, the other elements of which are respectively carried by the driven shaft and the other member of the pump. The hydraulic clutch it is preferred to employ is that described in the specification of the U. S. Patent No. 980,368.

Figure 1 is a longitudinal section of an apparatus constructed according to this vention. Figs. 2, 8 and 4 are sections on the lines 2-2, 3-3, and 44, Fig. 1, and Fig. 5 shows a detail.

1 is the driving shaft which has keyed to it the block 2 and the pinion 3. The block 2 revolves in contact at one point with the casing4 and has a number of radial cylinders 5 formed in it. These cylinders contain pistons 6 carrying pins 7 the ends of which lie in eccentric grooves 8 in the sides of the casing 4 so that as the shaft 1 and block 2 revolve clockwise relatively to the casing 4 the pistons are moved in and out and liquid is forced through the valve 9 in the direction of the arrow. By closing the valve 9 more or less the flow of liquid is throttled and the casing 4 is carried around with the shaft 1 at a speed depending on the amount of throttling. Hydraulic clutches of this type are well known and no further description is therefore necessary. The casing 4 is extended on one side to contain the epicylic gearing hereinafter described.

10 is the driven shaft which is recessed to receive the end of the driving shaft 1. The end of the driven shaft 10 in square and carries the pinion 11 which can be moved to and fro along it by the fork 12 carried by Specification of Letters Patent.

Application filed March 11, 1911.

Patented Nov. '7, 1911. Serial No. 613,837.

the pin 13 fixed to the sleeve 14 which can be moved to and fro by the arms 15 on the rocking shaft 16.

The epicyclic pinion 3 on the train is as follows :The shaft 1 is always in gear with the pinion 17 on the shaft 18 which is free to revolve in hearings in the casing 4 and has also fixed to it the pinion 19. The shaft 18 is cut away in the section Fig. 1 but is shown separately at Fig. 5. The pinion 19 is always in gear with a pinion 20 fixed on the shaft 21 free to revolve in bearings in the casing 4 and having also fixed to it the pinion 22. The sliding pinion 11 on the driven shaft 10 can be put into gear either with the pinion 19 on the shaft 18 or with the pinion 22 on the shaft 21 or it can be left between and out of gear with them. 23 is a brake strap around the casing 4. lVith this arrangement there are four positions in which the shaft 1 does not drive the shaft 1O. A. Assume that all the parts are in the positions shown, the valve 9 being fully open as shown in Fig. 1, the brake 23 being slack and the pinions 3-17, 19-11 and 1920 all in gear. Then the shaft 1 and pinion 3 revolve clockwise, the case 4 of the pump and gear box revolve backward from the pinion 3. The shaft 10 is stationary as its resistance is more than that of the case so that the pinion 17 walks backward around the pinion 3 and the pinion 19 walks backward around the pinion 11 and as (in the arrangement shown) the reduction of gears through 3 17, 1911, is two to one, it follows that the case revolves backward at half the speed of the shaft 1 while the shaft 10 remains stationary. B. Next slide the pinion 11 out of mesh with 19 and then the case becomes stationary and is quite a free member while the pinions 3-17, 19, 20-22 all revolve. Now since there is no contact with the pinion 11 there is no movement of the case, except the frictional movement caused by the revolving shaft 1. C. If the clutch valve 9 be now closed, the case 4 will revolve locked to the shaft 1 by the compressed liquid in the clutch but will only act as a fly wheel and do no useful work. D. Lastly. Open the clutch valve 9. Slide the pinion 11 into mesh with the pinion 22. This causes the case 4 to revolve with the shaft 1, but at a reduced speed, according to reduction in speed through the pinions 317, 19, 2022 meshing into the pinion 11.

When the parts are in the position A above, the shaft 10 can be driven by two methods. If the brake 23 be applied the case is brought to a standstill. Thus the motion of the shaft 1 is conveyed positively through the gears to the pinion 11 thereby revolving the shaft 10 in the same direction as the shaft 1, but at a reduced speed. This gives a low speed and the case becomes a stationary gear box. The brake 23 could be eased off a little and this would allow the case to revolve backward and give a slower speed. 01' instead of putting on the brake 23 the valve 1) may be gradually closed; this compresses the liquid against the valve and causes the case to come from the backward motion into a forward motion. \Vhen the valve is fully closed it looks the whole together, therefore no pinions revolve relatively to the case but the whole revolves as one unit including the shaft 11. If the valve is allowed to open a little, liquid escapes past it and the speed of the case is slower than that of the shaft 1 and therefore the pinions revolve relatively to the case. Thus an infinite variety of speeds can be obtained, the more the valve is opened the greater the difference between the speed of the shaft 1 and case 4.

\Vhen the parts are in the positions B and C above, the shaft 11 cannot be driven but when they are in the position I) it can be driven either backward or forward. If the brake 23 be applied the case is brought to a standstill and there is a positive drive through the reduction gears which revr ves shaft 10 backward, that is the reverse. his speed can be regulated by slipping the brake a little or much. If the brake 23 be released and the clutch valve 9 be closed, the case is locked to the shaft 1; and therefore locks all the pinions, and the shaft 10 is revolved in same direction as the shaft 1 thus giving a forward drive which can be varied by opening the valve more or less.

It will thus be seen that the direction of rotation of the shaft 11 can be changed from reverse to forward or forward to reverse without shifting the gears, the brake gives the reverse and the valve the forward motion.

What I claim is 1. The combination of a pump having communicating suction and delivery passages and comprising a drum and a casing surrounding it, a valve between the suction and delivery passages, an epicyclic train,

the middle element of which is carried by the casing, a driving shaft connected to the drum and to one of the end elements of the cpicyclic train, a driven shaft connected to the other end element of the epicyclic train, and a brake acting on the casing.

The combination of a pump having ctin'unul'iicating suction and delivery passages, a valve between the suction and delivery passages, a reversing epicyclic train, a driving shaft connected to one member of the pump and to one element of the epicylic train, a driven shaft connected to another element of the epicyclic train, and a brake acting on the third element of the epicyclic train such element being connected to theother member of the pump.

3. The combination of a pump having comnninicating suction and delivery passages and comprising a drum and a casing surrounding it, a valve between the suction and delivery passages, a reversing epicyclic train, the middle element of which is carried by the casing, a driving shaft connected to the drum and to one of the end elements of the epicyclic train, a driven shaft connected to the other end element of the cpicyclic train, and a brake acting on the CtlSlll".

it. The combination of a pump having communicating suction and delivery passages, a valve between the suction and delivery passages, an epicyclic train having reversing mechanism, a driving shaft con nected to one member of the pumpand to one element of the epicyclic train, a driven shaft connected to another element of the epicyclic train, a brake acting on the third element of the epicyclic train such element being connected to the other member of the pump.

5. The combination of a pump having communicating suction and delivery passages and comprising a drum and a casing surrounding it, a. valve between the suction and delivery passages, an epicyclic train having reversing mechanism, the middle element of which train is carried by the casing, a drivin shaft connected to the drum and to one of the end elements of the epicyclic train, a driven shaft connected to the other end element of the epicyclic train, a brake acting on the casing.

WILLIAM JOHN VINCENT.

\Vitnesses JOHN HIBBERT, R. F. WILLIAMS.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, I). G.