US846592A - Friction-gearing. - Google Patents

Description

No. 846,592. v PATENTED MAR. 12, 19071.

' MAURER.

FRICTION GEARING.

APPLIGATIOH FILED DEU.19. 1906.

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No. 846,592. PATENTBD MAR. 12, 190?.

L. MAUREIL.

- FRICTION GBARING.

, APPLICATION FILED DEO.19. 1906.

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FRICTION-(BEARING.

Specification of Letters Patent.

Patented March 12, 1907.

Application filed December 19, 1906. Serial No. 348.648.

To all whom it may concern.-

Be it known that I, LUDWIG MAURER, a subject of the German Emperor, residing at Nuremberg, Bavaria, Germany, have invented a new and useful Improvement in Friction-Gearing, of which the following is a specification.

This invention relates to friction-gearing, and has special reference to gearing of this type possessing special utility as a transmission-gearing for motor-vehicles and like machines.

In certain forms of friction-gearingsuch, for instance, as those disclosed in my former United States applications, bearin Serial Nos. 312,761 and 315,538, and fi ed, re spectively, April 20, 1906, and May 7, 1906 there is a tendency to the development of one-sided or uneven strains and also a lack of certainty that the friction-wheels will be pressed with the same or equal pressure against their respective friction-disks.

The present invention contemplates a construction intended to obviate the foregoing objections by providing a centrical arran ement of the gear-shifting mechanism or throwing the gearing into and out of action and which mechanism provides for simultaneously moving the friction-disks in opposite directions toward and from the frictionwheels without changing the positions of the axes of the friction-wheels.

While the invention is necessarily susceptible to structural modification without departing from the scope thereof, a preferred practical embodimentof the same is shown in the accompanying drawings, in which Figure 1 is a plan view, partly in section, showing the general arrangement of the improved friction-gearing with the parts thereof assembled in the relation which they preferably occupy for transmission purposes in motor-vehicles and like machines. Fig. 2 is an enlarged longitudinal sectional view through the end of the shiftable drivingshaft carrying the movable friction-disk and the shifting mechanism directly associated therewith. Fi 3 is a longitudinal sectional view throu h t e hollow end portion of the driving-shaft at right angles to the line of section of Fig. 2. Fig. 4 is a detail cross-section view on the line 4 4 of Fig. 2.

Like reference characters designate corresponding parts in the several figures of the drawings.

In carrying the invention into effect there is associated with a longitudinally-shiftable driving-shaft 1 a pair of oppositely-located friction- disks 2 and 3, which cooperate, respectively with the oppositely-located friction- wheels 4 and 5, mounted on the transmission-shaft sections 6 and 7. The shaftsections 6 and 7 are arranged, respectively, at opposite sides of the shaft 1 and are supported in any suitable bearings or bearing-supports provided therefor; but in the present invention it is intended that the axes 6 and 7 for the opposite friction- wheels 4 and 5 shall remain in fixed positions, while the throwing of the gearing 111 and out of action is accomplished solely through the shifting of the friction- disks 2 and 3. The said frictionwheels 4 and 5 are preferably splined or feathered upon their respective shaft-sections, as indicated at 8, so that the same may be adjusted axially to provide for alterations or adjustment in the transmission ratio.

The friction-disk 2 is fast on the drivingshaft 1, so as to be shiftable therewith, while the directly-opposite friction-disk 3 is loose on the shaft and has an independent shifting movement, while also capable of relative rotation. However, it is preferable in carrying out the invention to construct the loose disk 3 with what may be termed a bearing-hub extension 9 at one side to loosely receive therein the hollow end portion 10 of the shaft 1. The outer extremity of said hollow end portion of the driving -shaft is supported in an outer bearing-box 11, and at an intermediate point said shaft portion 10 has secured fast thereon an abutment-collar 12, provided with an inclined bearing-face l3, opposing a corresponding reversely-inclined bearing-face '14, formed upon a resser-head 15, projected centrally from one side of the friction-disk 3. An elastic or flexible coupling is provided between the disk 3 and the shaft 1 through the employment of a flexible coupling-ring 16, secured to thedisk 3 by means of one or more U-shaped clip-bolts 17, embracing the ring and bolted to a holdingflange 18, projected from one side of the disk 3 as an integral or rigid part thereof. At a point opposite its fastened connection with the flange 18 the said elastic coupling-ring 16 has a clip-bolt connection 19 with aconnecting-arm 20, having a rigid connection with the fast abutment-collar 12 on the hollow end portion 10 of the shaft 1.

The reversely-inclined bearing-faces 13 and 14 of the collar 12 and head 15 are adapted to be engaged by the double-beveled ends 21 of a pair of oppositely-arranged wedgeblocks 22, arranged crosswise of the hollow shaft portion 1 0 and operating through guideslots 24, formed in diametrically opposite sides of said shaft portion 10. The inner end portions of the blocks 22 are held within the carrying-fork 25 of an operating-plunger 26 and are formed with inclined faces 27, engaged by the inclined sides of an actuatingwedge 28. This wedge 28 is secured fast within the fork 25 of the plunger 26 and is disposed longitudinally thereof, as plainly shown in Fig. 2 of the drawings. 22 are loosely mounted.

The operating-plunger 26 slides longitudinally within the hollow portion 10 and is provided thereon with guiding and holding collars 29, which steady and support the plunger within the shaft. The outer end of the plunger has a rotatable swivel connection 30 with one end of a rocking lever 31, which in turn has a suitable controlling-rod connection 32 therewith.

Referring to the action of the mechanism, it will be observed that upon the retraction of the plunger 26 the blocks 22 are carried against one end of the slots 24 and against the collar 12, and simultaneously the wedge 28 is moved between the camming-blocks. The consequent result is to simultaneously draw upon the shaft 1 in one direction and thrust the blocks 22 outward, causing the loose friction-disk 3 to be moved in an opposite direction. Hence the two friction- disks 2 and 3 are simultaneously moved against their respective friction- wheels 4 and 5 simultaneously and with even pressure. The disengagement of the friction-disks is effected automatically upon release of pressure from the plunger26 by means of a releasespring 33, interposed between a fast collar 34 on the shaft 1 and a collar or shoulder 35 on the hub portion 9 of the loose disk 3. It will therefore be observed that the construction described allows a simultaneous and uniform engagement of the friction-disks, while the steadiness of the torque transmitted is insured by the insertion of the elastic coupling.

I claim 1. In a friction-gearing, the combination with a pair of friction-wheels, of a longitudi nally-shiftable driving-shaft, a fast and a loose friction-disk mounted on said shaft,

The blocks and a gear-shifting mechanism comprising 2. In a friction-gearing, the combination with a pair of friction-wheels, of a longitudinally-shiftable driving-shaft, fast and loose friction-disks mounted on said shaft, a release-spring arranged to normally move the friction-disks away from the friction-wheels, an elastic coupling between the loose disk and the shaft, and a shifting mechanism comprising means for simultaneously moving the shaft and the loose disk in opposite directions.

3. In a friction-gearing, the combination with the friction-wheels, of a longitudinallyshiftable driving-shaft having a hollow end portion, fast and loose friction-disks mounted on the shaft, an elastic coupling between the loose disk and the shaft, and a shifting mechanism centrically arranged within the hollow shaft portion and having wedge devices for simultaneously moving the shaft and the loose disk in opposite directions.

4. In a friction-gearing, the combination with the friction-wheels, of a longitudinallyshiftable driving-shaft having a hollow end portion provided with side guideslots, fast and loose friction-disks mounted on the shaft, the loose disk having a presser-head, a fast abutment-collar on the driving-shaft, a reciprocal operating-plunger working in said hollow shaft portion and provided with a carrying-fork, a pair of opposite wedgeblocks carried in the said fork and projecting through said guide-slots for engagement between and against said abutment-collar and presserhead, an actuating-wedge also carried by the fork of the plunger and operating between said blocks, and a release-spring interposed between the driving-shaft and the loose disk for moving said elements in opposite directions.

In testimony whereof the said LUDWIG MAURER has signed his name to this specification, in the presence of two subscribing witnesses, this 28th day of November, 1906.

LUDWIG MAURER. Witnesses:

J OIIANN STELZER, HEINRICH DYNNEBIER.

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