US2619847A - Hand and power operated mechanism - Google Patents

Description

1952 E. E. HOSEA 2,619,847

HAND AND POWER OPERATED MECHANISM Filed Nov. 4 71949 5 Sheets-Sheet l dverett" 5. 'Nceem @M W W; lVp- D 2, 1952 E. E. HOSEA 2,619,847

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I (Aw-Toma Patented Dec. 2, 1952 UNITED STATES PATENT OFFICE HAND AND POWER OPERATED MECHANISM Everett E. Hosea, Kaukauna, Wis., assignor to Kaukauna Machine Corporation, Kaukauna, Wis., a corporation of Wisconsin Application November 4, 1949, Serial N 0. 125,573

2 Claims.

The invention relates to machine tools of the type having slides or similar translatable elements and it is more particularly concerned with drive mechanism for translating such elements.

One object of the invention is to provide improved drive mechanism for a movable machine tool element such as a table, saddle or slide wherein rapid translation of the element for preliminary or rough positioning is effected by power means, while fine adjustments are efiected manually.

Another object is to provide improved controls for selective power or manual drive mechanism of the above general character embodying novel means for disconnecting the manual drive means when the power drive is in operation.

A further object is to provide drive mechanism for a movable machine tool element embodying optionally available power and manual drive means which is simple in construction, efiicient and reliable in operation, and which is subject to easy and accurate control by the machine attendant.

Other objects and advantages of the invention will become apparent from the following detailed description of the preferred embodiment illustrated in the accompanying drawings, in which:

Figure 1 is a fragmentary side elevational view of a radial drilling machine embodying the features of the invention.

Fig. 2 is a plan view of the machine shown in Fig. 1.

Fig. 3 is a fragmentary sectional view of the crossrail of the machine taken in a horizontal plane substantially on the line 3--3 of Fig. 1.

Fig. 4 is a fragmentary sectional view taken in a vertical plane substantially on the line 44 of Fig. 3.

Fig. 5 is a fragmentary sectional view taken in offset horizontal planes substantially on the line 55 of Fig. 3.

Fig. 6 is a transverse sectional view taken through one side of the crossrail in a vertical plane substantially on the line 6-6 of Fig. 1.

Fig. 7 is a fragmentary sectional view taken in a horizontal plane substantially on the line l-! of Fig. 2.

Fig. 8 is a layout diagram of the slide translating mechanism and associated controls.

While the invention is susceptible of various modifications and alternative constructions, I have shown in the drawings and will herein describe in detail the preferred embodiment, but it is to be understood that I do not thereby intend to limit the invention to the specific form disclosed, but intend to cover all modifications and alternative constructions falling Within the spirit and scope of the invention as expressed in the appended claims.

For purposes of illustration the invention has been shown as incorporated in a heavy duty radial drilling and tapping machine of the general type disclosed in my copending application Serial No. 685,527, filed July 22, 1946. The exemplary machine as shown in Figs. 1 and 2 has a movable element or slide in the form of a crossrail [0 carrying at one end a spindle headstock H and at the other end a motor M and adjustable speed transmission T for driving the headstock spindle. The crossrail I0 is supported for endwise sliding movement on a slide 12 which is vertically adjustable on a column l3 upstanding from a carriage l4 reciprocable on ways l5 on a horizontally disposed bed Hi.

In the particular machine illustrated, the crossrail I0 is made up of two similar side members each comprising an elongated channelshaped section ll (Figs. 2 and 6) with outwardlyturned flanges l8 and I9 along its upper and lower edges which are finished to form spaced parallel guides for the rails. The members H are assembled in side-by-side relation on the opposite sides of the slide I2 with the guide flanges engaged between overhanging guide plates 20 and guide rollers 21 on the slide. A housing 22 for the transmission T connects the side members 11 together at one end of the rail and a casing 23 forming a part of the swivel connection for the headstock l l secures the members together at the other end of the rail.

In machines of the type above described, positioning of the headstock ll radially with respect to the column 13 is effected by translating the crossrail H1 endwise relative to the column [3. While the mounting of the transmission T and headstock H on opposite ends of the crossrail serves to balance the structure, nevertheless considerable effort is required to effect the translation because of the heavy construction necessary to provide the strength and rigidity required for precision operation under heavy duty operating conditions.

In accordance with the invention, novel mechanism is provided whereby translation of the crossrail 18 for rough or approximate positioning of the headstock may be effected by a power drive while the final accurate positioning is accomplished manually. The driving mechanism comprises a rotatable driving member herein shown as a pinion 25 (Figs. 1, 2, 6' and 8) mounted in a a housing .25 carried by one of the side members i? of the crossrail and meshing with a rack 25 mounted on the slide it parallel to the path of movement of the rail. The pinion 25 is keyed to a vertically disposed shaft 21 journaled in the housing 25 and drivingly connected with optionally available power and manual drive means comprising, respectively, a reversible electric motor M-l and a handwheel 28.

In the exemplary machine, the motor lvI-l is mounted on the cover portion of the housin 25 preferably closely adjacent the pinion 25. The handwheel 28, however, is located for convenient access to an attendant in a position to closely observe the alinement of the tool and work. More particularly, the handwheel 23 is mounted on the end of a shaft 29 (Figs. 3 and 8) extending longitudinally of the side member I! and projecting at the end thereof adjacent the headstock H.

As shown in Fig. 3, the shaft 29 is supported at its outer end in a bearing bracket 30 suitably attached to the end of the crossrail lo and at its inner end by one wall of a housing 31 supported on one side memberv ll of the rail. For convenience of assembly, the shaft 29 may be constructed in two sections alined axially and operatively connected by a conventional coupler 32.

Preferably both the power and manual drives are taken through a speed reducing gear train indicated generally at 35 (Fig. 8) mounted in the housing 25 Thus the connection for the motor M-l includes a pinion 36. onthe motor shaft 31, gear 38, shaft 39, pinion d5,- gear 4!, shaft 42, pinion l3, gear shaft i5, worm t6. and worm gear 31 which is keyed to the drive shaft 2? for the pinion 25.

The major portion of the gearing above described is included. in the manual drive. Thus the primary shaft 39 of thegear train 35 has a gear 553. engaged with. a pinion 5i keyed to the shaft 52 supported in alinement with the shaft 29 and coupled therewith by a normally engaged clutch 5-3. As shown in Fig. 3; the clutch 53 preferably comprises a driving member 513 fast on the shaft 29 and. a driven member 55 splined or otherwise. nonrotatably fixed. to the shaft 52 and slidable axially thereon. intov or out of engagement with. the clutch member 54. The clutch members may be conveniently disposed between a wall. of. the housing 31 and a bearing bracket 56 which supports the adjacent end. of the shaft 52. Shifting of the movable clutch member 55 is effected by a shifter fork 5] mounted on a shaft 53 journaled on the bracket 56. The fork is arranged with its two arms straddling the clutch member and engaged in a circumferential groove 59 therein so as 'to impart axial move-. ments to the member when th fork is rocked with the shaft 58.

With the clutch 53 engaged, as it normally is, the rail driving pinion 25 may be rotated to traverse the rail [0 either to the left. or right asviewed in Fig. l by appropriate rotation of the hand wheel 23'. The extent of movementimparted to the rail per revolution of the handwheel is small due to the inclusion of the gear train 35 in the drive. Consequently, little effort is required to move this heavy machine element and accurate positioning of the element is greatly facilitated.

To enable the attendant to effect such positioning of the rail from either side of the machine, the manual operator for the drive is duplicated at theside of the machine opposite the handwheel 23. More particularly, an auxiliary handwheel 28a is provided in the same relative rela tion to the headstock II as the handwheel 28. As shown in Fig. 8 the handwheel 28a is mounted on a shaft 29a Extending longitudinally of the rail parallel to the shaft 29 and operatively connected therewith by a cross shaft 60 and bevel gear sets 6i and G2. The latter gear set is disposed in the housing 3|, as shown in Fig. 3, and one wall of the housing provides support for the adjacent end of the shaft 60.

The power drive is particularly advantageous in effectin a preliminary or rough positioning of the rail l0- especially when movement of the rail through a substantial range is necessary. The invention provides novel control mechanism by which the starting of the motor M-! and its direction of rotation may be conveniently controlled by a'single control member positioned closely adjacent the handwheel 28. Moreover, provision is made whereby the clutchv 53.may be disengaged through the action of this control member coincidentally with the starting of the motor so. that the handwheels 2-8 and: 2&2. will remain stationary during power traverse; of" the rail and thus present no. danger to:the machine attendant.

The control mechanism in. its; preferred form comprises a rotatable and, axially movable con-.

troller, herein shown as comprising a shaft 6 extending transversely across the rail [0. shaft is supported at oneend in a bearing carried by a side wall of the housing. 3| and at the. other end by a suitable bearing carried. by the'companion side member of the. rail. A coiled spring 66 interposed between. a wall of the housing 31; and a collar 6] rigid with th shaft urges the shaft toward a normal rest position in which; it is shown in Fig. 3. Axial. movement away from the normal rest position isimparted to the shaft as.

an incident to its rotation in either direction by suitable cam means.

As shown in Fig. 4, th cam means for axially shifting the controller shaft 65. comprises a sleeve member 68 mounted on the shaft 65; and; having a flanged base 69 rigidly. mounted. on a'wall ofthe housing 3|. The sleevesais. formed with. an axially directed slot terminating. at its inner end in converging Walls which form. opposing. cam tracks H! for a follower roller H. carried by. a pin 12 projecting radially from the shaft 65.. The cam tracks are inclined relative to the axis of. the shaft so that upon rotation of the. shaft in either direction theroller lllirides' along the cam. surfaces to move the shaft axially against the action of the spring 66. The. sidelwalls. of the cam slot adjacent the end of the member 68 are preferably disposed parallel to the axis of the shaft and serve as stops engageable by the roller H to confine the rotational movements of the shaft within predetermined limits.

For rotating the controllershaft 65a manually operable devi'casuch as a lever 15, is provided at the end of the crossrail lflconvenientl'y adjacent the handwheel. 28. In anexemplaryembodiment the hand lever 15 is nonrotatably secured on a rockshaft l6 journaled at one end of the bearing bracket 36 and at the other endin a. bearing, sleeve H formed integrally with thehousing. 3|.

The shaft 16 is arranged to project intothe hous..

ing and has keyed thereto a. bevel gear 18. meshingwith a bevel gear. 19 rotatably supportedin The;

' right as viewed in Fig. 1.

so that the shaft may move axially relative to the gear but is constrained to rotate with it.

To permit operation of the controller shaft 65 from the rear of the machine, a second hand lever 15a (Figs. 2 and 8) is arranged adjacent the handwheel 28a. The lever 15a is attached to a rockshaft. 15a drivingly coupled with the controller shaft by bevel gears 18g. and 19a- Rotational movements of the controller shaft 65 are utilized, in this instance for starting, stopping and determining the direction of rotation of the rail driving motor M-I. Such control is effected through the medium of a forward running switch FS and a reverse running switch RS. The switches are supported on opposite sides of the shaft 65, as shown in Figs. 2 and '7, and have their actuators 82 and 83 positioned to ride on flat cam surfaces 34 formed on sleeve members 85 pinned or otherwise nonrotatably fixed on the shaft 65.

When the controller shaft is in th normal rest position in which it is shown in Fig. 7, both control switches are open and the motor M-l is stopped. Rotation of the shaft 85 in a clockwise direction, as viewed in Fig. 7, closes the forward switch FS, thus starting the motor in a direction to move the rail forwardly or to the left as viewed in Fig. l. Rotation of the shaft 65 in the opposite direction closes the reverse switch RS, starting the motor to run in a direction effective to move the rail back or to the Thus movement of the rail l6 may be initiated and its direction determined through the controller shaft 65 by rocking one of the hand levers I5 or a in one direction or the other from the neutral position. When the hand lever is released the controller shaft is returned to neutral position by the action of the spring 66 and cam surfaces 70, thus stopping the motor and interrupting the movement of the rail.

Axial movements of the controller shaft 65 from and to the normal rest position are utilized to disengage and re-engage the clutch 53 associated with the hand feed wheel 28. For this purpose the controller shaft i operatively connected by a mechanical linkage with the clutch fork 51. As shown in Figs. 3 and 8, this linkage includes a shaft 88 journaled in the housing 3| and having one end, in this instance its lower end, projecting from the housing. Fixed on the shaft 86 within the housing 31 is a radial crank arm 81 having a pin 88 at its free end cooperating with a circumferentially grooved collar 89 fixed on the controller shaft 65. Endwise movements of the shaft 65 are thus effective to rock the arm 81 and shaft 86.

Fixed on the projecting end of the shaft 86 is a crank arm 90 connected by a rigid link 9| with a crank arm 92 fixed on the shaft 58 which carries the shifter fork 57. For convenient adlustment the link 9| may be constructed in two sections connected by a conventional turn buckle 93. Through the action of the linkage, the shifter fork is rocked in a direction to disengage the clutch 53 upon movement of the controller shaft 65 endwise from the normal rest position (upwardly as viewed in Figs. 3 and 8) and in a direction to re-engage the clutch upon return movement of the controller shaft.

It will be apparent from the foregoing that the invention provides drive means of a novel and advantageous character for translating a movable element such as the table or slide of a heavyduty machine tool. Small increments of movement may be imparted to the element for accurate positioning by a manual operator such as the handwheel 28 located for convenient manipulation by the machine attendant while closely observing the area of a workpiece to be operated on. Little effort is required to move the element by reason of the low driving ratio provided between the handwheel and the member which drives the element relative to its support.

Rough positioning of the machine tool element may be effected quickly and easily by power drive. The drive means for this purpose is easily controlled by a single manual control device such as the hand lever 15 conveniently located near the handwheel 28; Rocking of the hand lever in one direction or the other from a neutral position starts the driving motor and determines the direction of movement to be imparted to the element. At the same time, the manual drive is disengaged to prevent the hand wheel 28 from turning and endangering the at tendant when the power drive is operating. To stop the element it is only necessary to release the hand lever which automatically returns to neutral position, thereby terminating the power drive and conditioning the manual drive for operation.

I claim as my invention:

1. In a machine tool having a linearly translatable slide, a speed reducing gear train, a reversible electric motor connected to drive the slide through said gear train, manually operable means connected to drive said slide through said gear train including a pair of axially aligned shafts disposed parallel to the translatory path of the slide, a normally engaged clutch drivingly connecting said shafts, said clutch including a member shiftable axially of the shafts to disengage the driving connection, a control shaft extending transversely across one of said first-mentioned shafts supported for rotation and for limiting endwise movement, manually operable means for rotating said control shaft in either direction from a neutral position and for simultaneously imparting endwise movement thereto,

' switch means actuated selectively by rotation of said control shaft in one direction or the other for initiating forward or reverse operation of said motor, and a linkage operative to transmit the endwise movements of said control shaft to the movable clutch member to disengage the clutch before said motor is started.

2. In a machine tool having a linearly translatable slide, a speed reducing gear train, a reversible electric motor connected to drive the slide through said gear train, manually operable means connected to drive said slide through said gear train including a pair of axially aligned shafts disposed parallel to the translatory path of the slide, a normally engaged clutch drivingly connecting said shafts, said clutch including a member shiftable axially of the shafts to disengage the driving connection, a control shaft extending transversely across one of said firstmentioned shafts supported for rotation and for limiting endwise movement, manually operable means for rotating said control shaft in either direction from a neutral position and for simultaneously imparting endwise movement thereto, a cylindrical sleeve fixed on said control shaft, said sleeve having a flat cam surface formed on one side, a forward running switch and a reverse running switch connected in controlling relation to said motor, each of said switches having an actuator positioned to ride on said cam surface andd-isposed. so as to actuate; one switch; when the control shaft is rotated: in one direction from; neutral position and to, actuate theother switch:

when the control shaft is rotated in the other direction from neutral; position, and alinkageconneotingseid control shaft with the-movable member of said clutch operative to disengage the clutch in response to endwise movement of the control shaft;

EVERETT E. HOSEA.

REFERENCES CITED The. following referencesv are of record in the file. of: this; patent;

UNITED STATES PATENTS Number Name Date. Groene v r Dec 11, 1923 Hill et a1 June 17, 1930 Panish Aug. 5, 1941. Bruckel et a1 June 16, 1942 Zimmermann Apr.- 24, 1945 Vancil et a1 Jan. 25', 1949 Duianey Oct; 1-1;, 1949 Pegard Nov 15, 1949 Levy Apr. 25', 1950, Kuhn Oct; 17; 1950

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