US1558525A - Grinding machine - Google Patents

Description

A. WILLIAMS GRINDING MACHINE File'd Feb. 26. 1923 3 sheets-sheet 1 l Q1 N JV l\ n @l .I u; v" Nm 5 l, FL. 5| c .who

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Patented Oct. 27, 1925.

UNITED STATES PATENT OFFICE.

ARTHUR WILLIAMS, OF GRAND RAPIDS, MICHIGAN, ASSIGNOR TO WILMARTI-I & MORMAN COMPANY, OF GRAND RAPIDS, MICHIGAN, A CORPORATION OF MICHIGAN.

GRINDING MACHINE.

Application filed February 26, 1923.

To all whom t may concern:

Be it known that I, ARTHUR WILLIAMS, a

citizen of the United States of America, re-

Kent and State of Michigan, have invented certain new and useful Improvements in Grinding Machines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to grinding machines and has especial reference to grinding machines wherein a work holding table is reciprocated on a supporting guide structure beneath it by power normally in the operation of the machine, but which at times has to be moved through operation of mechanism actuated manually. It is a primary object and purpose of the present invention to equip a grinding machine of this type with means for driving the table either by power or manually and to positively and automatically disconnect the power drive paratively simple, durable in service and practical in all respects. Manyl other objects and purposes together with novel constructions for attaining the same will appear fully and in detail as understanding of the invention is had from the following description,- taken in connection with the accompanying drawings, in which,

Fig. 1 is a fragmentary plan, with parts removed, broken away and shown in sec tion, of the grinding machine equipped with the invention, disclosure of which is made by saidremoval and breaking away of parts of the machine.-

Fig. 2 is a fragmentary vertical section taken substantially on the plane of line 2 2, of Fig. 1, vlooking in the direction indicated by the arrows.

Fig. 3 is a fragmentary transverse vertical section on the plane of line `3-3, of Fig. 1, looking inthe direction indicated, and

Figs. 4 and 5 are vertical sections on the planesof lines 4--4, and 5 5, of Fig. 3, looking as the arrows indicate.

tance below it.

A fur- Serial No. 621,259.

Like reference characters refer to like parts in the different figures of the drawing.

The work carrying table 1 is mounted for sliding movements on suitable carrying guides 2 which are relatively stationary and formed at the upper portion of the grinding machine, a horizontal apron 3 extending in front of the front guide and a. short dis The table carries a rack 4- lengthwise thereof and on its under side, with which a pinion 5 is in engagement. Pinion 5 together with a larger bevelled gear 6 located directly below it is cast integral with a vertical sleeve 7, through which a vertical shaft 8 passes and which is rotatably mounted in a vertical supporting member 9. The lower end of the. sleeve rests on a shoulder made between the shaft 8 and an enlargement 8" thereof at its lower end, said shaft 8 being reduced in size at its upper vportion and receiving a securing nut 10 at its upper end which is seated in a recess made in the upper side of the pinion 5.

At the lower end of the enlargement 8l of shaft 8, a relatively large bevelled gear 11 is formed which is in mesh with another bevelled gear 12 fastened to the rear side of a gear 13, in turn driven by a gear 14 which may be power driven in any suitable manner, the usual and well known reversing mechanism used in machines of this type being interposed between the power source and the gear 14:. As it forms no part of this invention, the reverse mechanism is not shown or described. shaft 8 is continuously operated, with periodic reversals of Aits movementsl whenever the machine isin operation.

A clutch member 15 is yfixed at the lowerr end of the sleeve 7 and a coacting clutch member 16 is splined on the enlargement 8" of shaft 8 below the clutch member 15 and is adapted to be moved into engagement with said member 15, whereupon the sleeve 7 is driven with the shaft 8, and pinion 5 acting through rack 4c drives the table back and forth, reversing with the reversing of movement of themechanism, as is common in grinding machines of this character.

`A bevelled pinion 17 is in mesh with the gear 6, being located at the end of a shaft 18 rotatably mounted in a suitable sup- It is evident that porting bracket 18 which projects from the rear vertical wall, at the upper end of which one of the guides 2 for the table is located.

The end of the shaft 18 extends a short distance through this bracket and a clutch member 20 is fixed thereon. A second shaft 21, in axial alinement with. the shaft 18 is rotatably mounted in a second supporting bracket 22 paralleling the support 19, its outer end being equipped with a bevelled pinion 23 which is in mesh with another like pinion 241 fastened to the inner end of a shaft 25 which extends to the front of the machine and has a hand wheel 26 at its outer end for manual operation of the shaft 21 through the gearing connection therewith described. A second clutch member` 27 is spined on the shaft 21, acting on which is a spring .28` normally tending to force the cluutch member 27 into engagement with the clutch member 20. When the said clutch members are connected it is obvious that operation of the hand wheel 26 serves to turn the binion 17 and that the table 1 may be. moved in either direction in accordance with which way the wheel is turned.

A shaft 29, is located under the apron 3 and rotatably mounted in suitable journals depending therefrom, at its front end in front of the apron having an operating` handle 30. attached for manual operation. An arm 31 is attached to the rod toward its inner end which extends upwardly and laterally, having a pin 32 at its free end which passes between the clutch members 20 and 27, being designed to bear against the member 27 so as to move it away from thel member 2O,A when the shaft 29: is turned in. one direction. A second arm 33 is secured to the inner end of the shaft 29, ex-

tending laterally in the opposite direction from arm 31, at its end being forked to `connect with a pin 34 passing through the upper end of a vertical rod 35 which is slidably mounted in a laterally off-set-portion 9n to, the part 9. At its lower end, rod carries a yoke 3G. which is engaged with a collar 16 at the lower portion of the clutch member 1G, it being evident that the clutch member is moved into engaging' position with member 15 or away therefrom in accordance with the vertical movements of the rod 315, and that such movements of the rod 35, are controlled by the rotation of shaft 29., softhat when the rod is moved upwardly to engage clutch member 16 with the member 15, there is a simultaneous movement of the arm 31 to cause pin 32 to act on the clutch member 27, moving it out of engagement with the member 20. Accordingly, only one pair of the clutch members can be engaged at a time, the others being separated; and when the power drive operates the table, the manually operable drive is. inoperative and when the manually operable drive is operative, the power drive is disconnected.

An arm 37 extends from the shaft 29 just back of the down-turned front portion of the apron 3, at its free end being formed into a shape substantially triangular in cross section, indicated at 3.8. A latch plug 39 is mounted ina suitable housing 40 formed on the depending portion of the apron and is spring actuated to bear against the said part 33 of the arm, lying against one of the angular sides thereof when the shaft and attached arm are i-n one position and against the other angular side when in the other position.v This forms a releasable latch mechanism for holding the shaft 29 in either of the positions to which it may be operated and insures against detachment of the clutch members which are in engagement until man-ual operation of the shaft with a design to effect such disen gagement and engagement. of the other pair of clutch members.

The construction described is relatively simplel and is durable and practical in all respects. The hand wheel 26 is insured against movement when the machine is in operation under the power drive and the power drive mechanism is insured of co1n-' plete separation from the table when the same is to be operated manually, making the manual operation comparatively easy. The appended claims define the invention and it is to be considered that all forms of structure coming within their scope are comprehended by the invention.

I claim:

1. In a machine of the class described', a longitudinally movable table, supporting guides therefor, a rack connected to the table, a vertical sleeve rotatably mounted below the table, a. pinion at the upper end of the sleeve connected with the rack, a gear on the sleeve below the pinion, a clutch member fixed at the lower end'of the sleeve, a. movably mountedI clutch member adapted to connect with the first clutch member, a power operated mechanism connected with the movably mounted' clutch member to drive the same., manually operable 1nechanism connected with the gear on the sleeve and including: two additional clutch membersy adapted to be connected or disconnected., and/means for selectively connecting either the first two clutch members andv disconnect the last t-wo clutch members, or vice versa. substantially as described'.

2. In a machine ofthe class described, a longitudinally movable table, guid'e supports therefor a rack connected to the table, a vertical sleeverotatably mounted below the table a pinion at the upper end of the sleeve engaged with the rack, a clutch at the lower endof the sleeve includinga member fixed to the. sleeve and a second' member movably mounted to move into or out of engagement with the first member, power driven mechanism with which the second clutch member is associated to be driven continuously thereby, manually operable mechanism adapted to be connected to or disconnected from the sleeve, and means to operate the second clutch member into engagement with the first clutch member and simultaneously disconnect the manually operable mechanism from the sleeve, or vice versa, substantially as described.

3. In a machine of the class described, a longitudinally movable table, guide supports therefor, a rack connected to and positioned longitudinally of the table, a vertical sleeve rotatably mounted under the table, a pinion on the upper end of the sleeve engaging with the rack, a gear on the sleeve below the pinion, a clutch member on the lower end of the sleeve, a shaft extending upwardly through the sleeve, a second clutch member splined on the shaft below theV first clutch member, means for driving the shaft, a pinion in mesh with the gear, a second shaft on which the last named pinion is fixed, a third clutch member on the second shaft, a third shaft in alinement with the second shaft, a fourth clutch member splined on the third shaft, means to manually operate the third shaft, and manually operable means for simultaneously operating the second and fourth clutch members, to move the second member intov connection with the first clutch member and the fourth member away from the third member, or vice versa, substantially as described.

4:. In a machine of the class described, a longitudinally movable table, guide supports therefor, a rack connected to and positioned lengthwise of the table, a vertical sleeve rotatably mounted under the table, a pinion on the upper end of the sleeve engaging with the rack, a gear on the sleeve below the pinion, a clutch member on the lower end of the sleeve, a shaft extending upwardly through the sleeve, a second clutch member splined on the shaft below the first clutch member, power means for driving the shaft, second and third shafts rotatably mounted in alinement, a second pinion on one end of the second shaft engaging with the gear on the sleeve, a third clutch member fixed on the opposite end of the second shaft, a fourth clutch member splined on the third shaft, a fourth shaft rotatably mounted and extending at right angles to the second and third shafts, means to manually turn the fourth shaft, separate means to manually turn the third shaft, and means on the fourth shaft operatively associated with the splined clutch members to move one into operation with its associated clutch member and simultaneously move the other out of engagement with its associated clutch member, substantially as described.

In testimony whereof I affix my signature.

ARTHUR WILLIAMS.

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