US1454472A - Eccentric deeding mechanism - Google Patents

Description

May 8, 1923. 1,454,472

W. J. GUILD ECCENTRI C FEEDING MECHANISM Filed April 6, 1921 2 Sheets-Sheet 1 www- May 8, 1923.

W. J. GUILD ECCENTRIC FEEDING MECHANISM Filed April 6, 1921 2 Sheets-Sheet 2 Patented May 8 1923.

UNITED, STATES PATENT OFFICE.

WALDO J. GUILD, OF WORCESTER, MASSACHUSETTS, ASSIG-NOR TO HEALD MACHINE COMPANY, OF WORCESTER, MASSACHUSETTS, A CORPORATION OF EIASSACHUSETTS.

ECCENTRIC FEEDING MECHANISM.

Application filed April 6,

T aZZ whom it. may, concern:

Be it known that I, lVALDo J. GUILD, a citizen oi the United States, residing at Worcester. in the county of Worcester and State of Massachusetts, have invented a new and useful Eccentric Feeding Mechanism, of which the following is a specification.

This invention relates to an internal grinding machine of the type in which the work does not rotate but the grinding wheel is moved inside the work in a circular path eccentric to its own axis.

My invention relates particularly to improved means for adjusting the eccentricity of the wheel spindle, being in the nature of an improvement over the construction shown in my prior Patent No. 1,361.850 patented December 1 1, 1920.

It is the object of my present invention to provide improved adjusting mechanism which may be safely operated while the ma chine is in motion and by which the eccentricity of the wheel spindle may be quickly and accurately adjusted.

A further object is to provide mechanism for this purpose in which all parts are so constructed as to provide ample strength.

My invention further relates to arrangements and combinations of parts to be hereinafter described and more particularly pointed out in the appended claims.

A preferred form of my invention is shown in the drawings in which- Fig. 1 is a side elevation of the wheel head of an internal grinding machine;

Fig. 2 is an end elevation of the wheel head, taken along the line 22 in Fig. 1;

Fig. 3is a plan view of the wheel head, certain parts being shown in section;

Fig. 4 is a transverse sectional elevation, taken along the line 4l4 inFig. 3, and

Fig. 5 is a side elevation of certain parts, taken along the line 55 in Fig. 3.

Referring to the drawings, I have show 7 parts of an internal grinding machine comprising a frame 10 having bearings 11 and 12 for a rotatable outer sleeve or supporting member 13. The member 13 may be contin uously rotated in any convenient manner as by a gear 14 engaged by a pinion 15 on a belt driven shaft 16.

An inner member 17 (Fig. 3) is eccentrically mounted in the outer member 13 and is provided with an eccentrieally positioned bearing for the wheel spindle 18. Reference vention, which relates specifically to improved devices for thus adjusting the eccentricity of the spindle 18. For this purpose I provide a gear mechanism comprising in part a large gear 20 mounted to rotate with the-member 13 and gear 14: previously described. The gear 20 meshes with a' pinion 21 on a short shaft 22 rotatable about a fixed center.

A second large gear 23 is mounted for tree rotation on the end of the member 13, and internal gear 242 is formed integral therewith and meshes with a spur gear 25 fined to the end of the inner member 17.

Rotation of the large gear 23 relative to the member 13 will evidently cause corresponding angular movement of the inner member 17, thus adjusting the eccentricity of the spindle. A stop pin 26 in the gear 25 is adapted to engage pins 27 and 28 in the end of the member 13, thus limiting the angular movement of the inner member to 130. Further movement in either direct-ion is useless,

as it will merely reverse the adjustment and will not give additional range.

The gear 23 meshes with a pinion 30 (Fig. 3) mounted on the end of a. short shaft 31 rotatable in alignment with the shaft 22 previously described. The shafts 22 and 31 are preferably mounted to turn in flanged sleeves 32 and 33 which, in turn, are rotatable in fixed bearings 3 and 35. A ring 36 is fixed between the flanges ofthe sleeve 32 and 33 and has an eccentric bearing therein for a pair of internal gears 37 and 33- The gear 37 meshes with a spur gear 39 on the end of the shaft 22 and the gear 38 meshes with a .spurgear 40 on the end of the shaft 31. A spiral gear 41 is formed on the sleeve 33 and engages a corresponding gear l2 on the shaft 43 (Fig. 5) having a hand wheel as thereon.

While the gear trains connecting the large gears let and 23 to the internal gears 37 and 33 comprise gears of different sizes, the combinedratio in each case is the same, so that the gear 23 will be driven at the same speed as the gear 20 so long as no movement of the hand wheel M: occurs. In the example shown in the drawings, the gear 20 has 140 teeth, the vgear 21 has 4L0 teeth, the gear .39 hasflS teeth and the gear 37 has 56 teeth. Similarly, the gear 23 has 141 teeth, the gear has 39 teeth, the gear has 39 teeth and the gear 38 has 47 teeth, in each case giving a ratio from 1 to 3 between a large gear and its connected internal gear.

So long therefore as no angular adjustment of the ring 36 occurs, the gear 23 will rotate at the same speed as the gear 14 and consequently at the same speed as the gear 25 on the end of the member 13. Any angular movement of the ring 36, however, caused by adjustment of the hand wheel 44-, will result in a differential movement of the gear 23 relative to the gear 20 and will cause a slight angular adjustment of the inner member 17 in the outer member 13. In this manner the eccentricity of the spindle may be easily and safely adjusted while the machine is in motion. The provision of the internal gears 37 and 38 is of particular importance as it allows the meshing of many teeth between these gears and the spur gears 39 and 40, and prevents the possibility of injuring the mechanism when adjustment is made.

Suitable mechanical means may also be provided for turning the shaft 4:3, as clear ly disclosed in my prior patent.

Having thus described my invention it will be evident that changes and modifications may be made therein by those skilled in the art within the spirit and scope of my invention as set forth in the claims and I do not wish to be otherwise limited to the details herein disclosed but what I do claim is I 1. In an internal grinding machine, a wheel spindle, a bearing member in which said spindle is eccentrically mounted, a rotatable member in which said bearing memher is eccentrieally mounted, and means to adjust the eccentricity of said bearingmem" her in said rotatable member, said means including a pair of internal gears having different numbers of teeth, connections from said gears to said rotatable member and to said bearing. member respectively, a carrier in which said internal gears are eccentrically mounted, and means to angularly adjust said carrier.

2; An internal grinding'machinehaving in combination a wheel spindle an inner member in which said spindle is eccentrically and r0- t-atably mounted, an outer member in which said inner member is eccentrically mounted, a supporting bearing for said outer member, means to independently rotate said outer member and said wheel spindle, and means to angularly adjust said inner member in said outer member, said means comprising a first gear rotating in fixed speed relation to said outer member, a second gear mounted to rotate freely about the axis of said outer member, a positive gear connection between said second gear and said inner eccentric member, and driving connections between said first and second gears, said connections comprising a pair of aligned shafts, pinions fixed to said shafts and engaging said first and second gears respectively, gears of unequal size also fixed to said shafts, internal gears of unequal size engaging said latter gears, a carrier in which said internal gears are mounted to retate together, and means to angularly adjustsaid carrier.

3. An internal grinding machine having, in combination, a wheel spindle, an inner member in which said spindleis eccentrically and rotatably mounted, an outer member in which said inner member is eccentricallv mounted, a supporting bearing for sai outer member, means to independently rotate said outer member and said wheel spindle, and means to angularly adjustsaid inner member in said outer member, said means comprising a first gear rotating in fixed speed relation to said outer member, a second gear mounted to rotate freely about the axis of said outer member, a positive gear connection between sa-id second gear and said inner eccentric member, and driving connections between said first and sec 0nd gears, said connectit'ins comprising a pair of aligned shafts, pinions fixed to said shafts and engaging said first and second gears respectively, gears of unequal size also fixed to said shaftsat the adjacent ends thereof, a pair of internal gears rotatable as a unit and meshing with said'latter gears, a carrier rotatable about the axis of said shafts and in which said internal gears are eccentrically and rotatably mounted, and means to rotate said carrier whereby the eccentricity of said spindle may be varied;

In testimony whereof I have hereunto aflixed my signature.

VVALDO J. GUILD.

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