US1343131A - Speed-changing device - Google Patents

Description

E. 0. HEAD. SPEED CHANGING DEVICE.

APPLICATION FILED NOV. 10, 1917- Patented June 3 snans-smm m, ATTORNEYS.

Patented June 8, 1920.

3 SHEETS-SHEET 2.

AITOR/VEKS.

E C. HEAD.

SPEED CHANGING DEVICE.

APPLICATION FILED NOV. 10, MPH- Patented June 8, 19%.

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SPEED-CHANGING DEVICE.

Application filed. November 10, 1917.

To all whom it may concern:

Beit known that I, ERNEST 0. HEAD, a citizen of the United States of America, and a resident .of Van divert, Ohio, have invented a new and useful Improvement in speed Changing Devices, which invention is fully set forth in the following specification.

This invention relates to speed-changing devices for machine-tools, and while capable of use in a wide variety ofplaces, has especial utility in controlling the table drive of a vertical. boring and turning mill.

An object of the invention is to provide a controlling device for speed-changing gears which is simple in construction, eflicient in operation, and easy of manipulation.

A further object of the invention is to provide a device of the type characterized that may be operated by the workman at l11S normal position with respect to the machine and which will there indicate to such workman the precise position of the change-speed gears.

Another object of the invention is to provide-the movable members of speed-changing gears operatively-related in series with a controlling device comprising a single disk so constructed as to constitute a plurality of cams whereby the said speed-changing gears may be actuated by the rotation of said single disk.

Other objects will appear as the description of the invention proceeds.

The invention broadly considered comprises, in a speed-changing device for machine-tools, change-speed gearing including a plurality of change gears operatlvely-related in series, and means for controlling the same comprising a rotatable disk constructed to constitute a plurality of cams and connections coacting with said cams and operatedby the rotation of said disk to selectively actuate said change-gears. In 1ts preferred embodiment, the changespeed gearing comprises a plurality of operatively related gears a portion of which are shiftable to selectively engage other gears thereof, and said disk is provided on its opposed faces with cam grooves to shift said shiftable gears. Means are also preferably provided to indicate to the operator the position of said shiftable gears.

The invention is capable of receiving a variety of mechanical expressions, oneof which is shown on the accompanying drawings, but

Specification of Letters Patent.

Patented June 8, 1920.

Serial No. 201,244.

it is to ,be expressly understood that the drawings are for purposes of illustration only andare nottobe construed as adefinitionof the limits of the invention, reference being had to the appended claims for that purpose.

In said drawings Figure l is a sideelevation of a portion of avertical boring and turning mill equipped with a speed-changing device in accordance with the present invention, the elements of said device having surface shading applied thereto to distinguishthem from the other elements of the machine;

Fig. 2 is an elevation of thelever elements of said device, the cam disk being shown in dotted lines;

Fi g. 3 is an elevation of one face of the cam disk;

Fig. 4 is aface view of the actuation box;

Fig.5 is a central vertical section of said box, showing the cam-actuating gears in elevation;

Fig. 6 is a side elevation of the gears contained in the speed box of the table drive;

Fig. 7 is a horizontal sectionthrough said speed box showing the gears thereinin plan;

.Figs. 8 and ,9 are details of the speedchanging gears.

Referring in detail to said drawings, wherein the samereference characters are used to designate corresponding parts throughout the several figures, the speedchanging device of the present invention is shown as applied to a vertical boring and turning mill, and particularly to controlling the speed-changing gears in the drive of the table of suchmilhbut it is to be expressly understood that the invention is not limited in its application to any particular form of machine-tool but is capable of use in a wide. variety of places where speedchanging gears of the type in question are to be controlled.

In the form shown in Fi g. 7 1 is the drive shaft for driving the change speed gears in the box 2, located in the embodiment illustrated at the extreme rear of the machine. Mounted for reciprocation upon said shaft 1 within said box 2 are two gears ,3 and 4 which, together with the flange 5, constitute a unitary gear member provided with a spline received in the seat 6. Also mounted within the box 2 and parallel to the shaft '1 are two shafts 7 and 8. Shaft 7 carries three gears 9, l0 and 11 fixed thereto. Gear 10 may mesh with gear 1 and gear 11 with gear 3. Mounted for reciprocation on shaft 8 and splined thereto are two gears 12 and 13 constituting a unitary gear member and designed to mesh with gears 9 and 10 respectively. Gear members 3, 1 and 12, 13

together with the intermediate gears 9, 10,

' with a bracket 20 which supports rotatably a solid shaft 21 and a tubular shaft 22, the shaft 21 being received within the bore of shaft 22. Pinned to shaft 21 is'an arm 23 which at its opposite end is operatively connected to rod 16. Mounted upon shaft 22 is a similar arm 2st operatively connected at its opposite end to rod 17. Shafts 21 and 22 are also provided at their opposite ends with arms 25 and 26 respectively, carrying rollers 27 and 28 for coaction with the cam grooves 29 and 30. upon the opposed faces of a rotatable disk 31. Disk 31 is therefore so constructedas to constitute a plurality of cams. 1V hile the cams'are shown in the form of grooves in the opposed faces of disk ation they could be formed in the same face or could take the form of raised cam guides, or even cam faces. r

, am disk 31 is mounted on shaft 32which, in the form shown in Fig. 1, extends to the front of the mill where, in a position con venient to the operators normal location, it is provided with a suitable operating device and also, preferably, a suitable indi' cating device. In the form shown, .said shaft at its forward end carries a gear 33, which may be a helical gear, contained within the actuation box 34. \Vithin said box is also mounted a pinion shown as a helical pinion, in mesh with gear and carried upon a shaft 36 which extends to the exterior of said box 34 and is there provided with. a suitable operating crank 37. Shaft 32 also preferably carries exterior-1y of the box 3 1 a pointer 38 for coaction with suitable indicating characters on the cover 39 of said box. p V

In the embodiment of the invention illustrated on the drawings, the ratio between operative positions to secure any one of the four combinations of said gears whereby the shaft.8 may be driven from the shaft 1 at any one of four different speeds. Thus the shaft 8 may be driven from shaft 1 through any one of the" four following trains :gears 3,11, 10, 13; gears '3, 11, 9, 12; gears 4-, 10, 13; gears l, 10, 9, 12.

Therefore it will be perceived that a speed-changing device for machine-tools has been provided comprising a minimum number of parts, and one that is both convenient of manipulation, owing to the location of itsmanual operating-device at the operators station, and simple in construction, owing to its control of the, changespee'd gears from a single disk so constructed as to constitute a plurality of cams.

lVhile the embodiment illustrated on the drawings has been described with considerable particularity, it is expressly understood that the invention is not to be restricted thereto but is capable of receiving a variety of mechanical expressions, some of which will readily suggest themselves to those skilled .in the art, while certain features thereof are capable of use without other features thereof. Furthermore, while in the illustrated embodiment but two sets of shiftable gears have been controlled, it will be apparent that more thanv two sets may be shifted by suitable modification of the controlling device. Reference is therefore to st. had to the claims hereto appended for a definition of the limits of the invention.

lVhat is claimed is r r 1. In a speed-changing device for machine-tools, a driven shaft, change-speed gearing in the drive of said shaft, said change-speed gearing comprising a plurality ofsimultaneously operative gear members having respectively a plurality of operative positions, and means to adjust said gear members to drive said shaft selectively at different speeds, said adjusting means comprising a single rotatable disk constructed to constitute a plurality of cams, connections whereby the rotation of said cams shifts the respective gear members, and means to rotate said disk.

2. In a speed-changing device for machine-tools, a driven shaft, change-speed gearing in the drive of said shaft, said change-speed gearing comprising a plurality of simultaneously-operative gear members having respectively a plurality. of operative positions, and means to adjust said gear members to drive said shaft selectively at different speeds, said adjusting means comprising a single rotatable disk having its opposed faces constructed to constitute a plurality of cams, connectionswhereby the rotation of said cam shifts the respective gear members, and means to rotate said disk.

3. In a speed-changing device for machinetools, a driven shaft, change-speed gearing in the drive of said shaft, said change-speed gearing comprising a plurality of simultaneously-operative gear members having respectively a plurality of operative positions, and means to adjust said gear members comprising a single rotatable disk constructed to constitute a plurality of cams, means coacting with said cams and directly connected with the respective gear members to shift the same, and means to rotate said disk, the rotation of said disk selectively effecting the movement of all said gear members to their several operative positions.

4. In a speed-changing device for machine-tools, a driven shaft, change-gears operatively-related in series in the drive of aid shaft and comprising a plurality of members having a plurality of operating positions, and means for adjusting said members comprising a single rotatable disk coir structed to constitute a plurality of cams, means coacting with said cams and connected with the respective members to actuate the same, and means to rotate said disk.

In a speed-changing device for ma chinetools, a driven shaft, change-speed gearing in the drive of said shaft comprising a plurality of shiftable gear members, and means to adjust said gear members comprising a single disk mounted for continuous rotation in either direction and constructed to constitute a plurality of cams, connections whereby the rotation of said cams shifts the respective gear members, and means to rotate said disk continuously in either direction.

6, In a speed-changing device for machinetools, a driven shaft, change-speed gen ring in the drive of said shaft comprising a plurality of shiftable gear members, and means to adjust said gear members comprising a single disk mounted for rotation and constructed to constitute a plurality of continuous cams, connections whereby the rotation of said cams shifts the respective gear members, and means to rotate said disk.

7. In a speedchanging device for machine-tools, a driven shaft, change'speed gearing in the drive of said shaft, said change-speed gearing comprising a plurality of simultaneouslv-operative gear members respectively having a plurality of operative positions, and means for adjusting said gear members comprising a single rotatable disk constructed to constitute a plurality of cams, connections whereby the gearing in the drive of said shaft, said change-speed gearing comprising a plurality of unitary gear members respectively having a plurality of operative positions, and means for adjusting said gear members comprising a single rotatable disk constructed to constitute a plurality of arms, connections whereby the rotation of said cams shifts the respective gear members, and means to rotate said disk comprising a manually-operable device and speed reducing gearing between said device and said disk.

9. In a sped-changing device for machine-tools, a driven shaft, change-speed gearing in the drive of said shaft, said change-speed gearing comprising a plurality of shiftable gear members, rectilineally movable elements for shifting the respective gear members, a single rotatable disk constructed to constitute a plurality of cams, concentric shafts provided with arms operatively-related to said cams and said gear members, and means to rotate said disk.

10. I11 a speed-changing device for machine-tools, a driven shaft, change-speed gearing in the drive of said shaft comprising a plurality of shiftable gear members, concentric shafts operatively connected to the respective gear members, a single rotatable disk constructed to constitute a plural.- ity of cams, operative connections between said cams and the respective shafts, and means to rotate said disk.

11. In a speed-changing device for machine-tools having change-speed gearing remote from the operators normal position at the machine, said change-speed gearing comprising a plurality of shiftable gear members, means to adjust said gear members comprising a single rotatable disk constructed to constitute a plurality of cams, connections whereby the rotation of said. cams shifts the respective gear members, a shaft for rotating said disk extending to the operators position at the machine, means at said position for rotating said shaft, and means at said position for indicating the positions of said gear members.

12. In a speedchanging device for machine-tools having change-speed gearing remote from the operators normal position at the machine, said change-speed gearing comprising a plurality of shiftable gear members, means to adjust said gear members comprising a single rotatable disk constructed to constitute a plurality of cams, connections whereby the rotation of said cams shifts the respective gear members, a shaft for rotating said disk extending to the operators position at the machine, a pointer on said shaft for indicating the positions of said gear members, and'means comprising speed-reducing gearing for rotating said shaft.

' cams shifts the respective gear members, and

means to rotate said disk,

14. In a speed-changing device for a boring mill having change-speed gearing in the table drive, said change-speed gearing comprising a plurality of simultaneouslyoperative gear members which have a plurality of operative positions, meansfor adjusting said gear members comprising a single rotatable disk constructed to constitute a plurality of cams, connections where- V by the rotation of said cams shifts the respective gear members, and means to'rotate said cam. I

p In testimony whereof I have signed this specification. V

ERNEST C. HEAD.

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