US1956068A

US1956068A - Crank shaft grinder

Info

Publication number: US1956068A
Application number: US688451A
Authority: US
Inventors: Herzog George
Original assignee: Individual
Current assignee: Individual
Priority date: 1933-09-07
Filing date: 1933-09-07
Publication date: 1934-04-24
Anticipated expiration: 1951-04-24

Description

April 24, 1934. G. HERZOG 1,956,068

GRANK SHAFT GRINDER Filed Sept. 7, 1935 3 Sheets-Sheet l El E 45 GEORGE #l1-P206 April` 24, 1934. G. HERZOG CRANK SHAFT GRINDER Filed Sept. 7, 1933 3 Sheets-Sheet 2 11mm'Il April 24, 1934. c,- HERZOG 1,956,068

CRANK SHAFT GRINDER Filed Sept. '7, 1935 3 Sheets-Sheet 3 e Il I l 2,/ |..l HH h Li 4/ l iig" ww ,35 'UW 35 55 52 32, Z7 44 52a, 6, E z. E. 3, 4o 5 4a GeoRef HERZOG Patented Apr. 24, 1934 fr srrss Claims.

This invention relates to a grinding machine and concerns itself with a structure in which the grinding element rotates in an orbit and also upon its own axis and in which a novel yielding 5 drive is provided for rotating the parts.

The invention comprises the novel structure and combinations of parts hereinafter described and more particularly pointed out and dened in the appended claims.

In the accompanying drawings which illustrate a preferred form of this invention and in which similar reference numerals refer to similar features in the different views,

Figure 1 is a top plan view of a machine involving this invention and showing the same mounted upon a lathe.

Figure 2 is a side elevational view of the machine upon its mounting and showing the article being ground in section.

Figure 3 is an enlarged side elevational view of the machine detached from the lathe base.

Figure 4 is a sectional view taken upon the line IV--V of Figure 3 looking in the direction of the arrows.

Figure 5 is an enlarged top plan view of the machine in detached form.

Figure 6 is an enlarged sectional view taken upon the line VI-V of Figure 3 looking in the direction of the arrows.

Figure 7 is an enlarged sectional view taken upon the line VTI- VU of Figure 3 looking in the direction of the arrows.

Figure 8 is an enlarged fragmentary sectional View of the machine illustrating certain features.

The grinding machine is shown in Figures 1 and 2 as mounted'upon a lathe 1 which is provided With an ear 2 to which a lug 3 on one side of the circular frame 4 of the grinding machine is pivoted. The opposite side of the frame 4 is supported from the lathe by rods 5 and 6 connected by a turnbuckle 7. By adjusting the turnbuckle the frame 4 may be circumferentially adjusted to bring the same concentric with the article 8 that is to be ground, and which in the present instance is illustrated as a bearing of a crank shaft supported by the lathe.

A cylindrical drum 9 is mounted interiorly of and concentric with the frame 4 as best shown in Figure 4. This drum has a peripheral flange 10 spaced a short distance from the frame 4 and thrust bearing balls 11 travel in a race way between the frame and flange. A pulley 12 is threaded upon the drum 9 upon the opposite side of the frame 4 and firmly secured by a screw 13. F55'NA Thrust bearing balls 14 travel in a raceway formed between the frame 4 and pulley 12. The pulley 12 is provided with a groove 15 for receiving a belt 16 whereby the drum may be rotated.

The drum 9 is provided with a bracket 17 provided with a guideway 18 and a flange 19 in alinenient with the bracket. A slide 20 is mounted in the guideway 18. A screw 21 is rotatably anchored in a cap piece 22 upon the top of the bracket. By rotating the screw, the slide 20 may be raised or lowered. Y A grinding wheel hanger 23 is removably secured te the slide 26 by means of a bolt 24 whereby said hanger may be reversed to bring the grinding wheel into a different plane as shown in Figure 8, a feature which may be desirable when grinding certain articles. The hanger is inwardly offset and carries a stub shaft 25 upon which a bushing 26 is secured. A grinding wheel 27 is journaled upon the bushing and this grinding wheel has a pulley 28 attached thereto which is journalled upon the bushing by means 0f bearing balls 29. Y v

In order to retain the slide iirmly in the guide way 18 the latter is preferably made in the form of a dovetail and the slide 20 is correspondingly fashioned, and a wear plate 30 (Figure 7) adapted to be adjusted by screws 31 is placed along one side Wall of the guide way to prevent any looseness between the slide and theV walls of the guideway. Y

A pair of radially extending brackets-32 are adjustably `attached to the flange 19. These brackets have outwardly ciset portions 32a as best shown in Figure 6. A shaft 33 is secured to each bracket, and a sleeve bearing 34 is secured upon such shaft. A pulley 35 is journalled upon each sleeve bearing 34 by means oi ball bearings 36'. The pulley has an oil duct 37 that extends to the ball bearing and that communicates with an oil hole 38 normally closed by a plug 39. Each pulley 35 has a pair of belt grooves 40.

A plurality of pulleys 41 are journalled upon studs 42 extending from one side of the cylindrical frame 4 as shown in Figures 3 and 4. The pulleys are preferably mounted upon ball bearings as shown in Figure 4. Each pulley 41 has a pair of belt grooves 43 as best shown in Figure 4.

It will be noted that one groove in each pulley 35 is in alinement with the groove in the pulley 28 on the grinding element 27 for receiving the driving belt 44 for the grinding element. This belt merely travels over the pulleys 35 and the pulley 28 and to maintain the same taut, a tensioning pulley 45 is mounted upon an adjustable arm 46 upon one of the brackets 32 (Figure 2).

The drum 9 is adapted to be rotated by the belt 16 which surrounds a pulley 4'7 (Figure 1) on the shaft of a driving motor 43.

A second driving motor 49 is mounted opposite the motor 48 and the shaft 50 of this motor carries a pulley 51 for driving a belt 52 trained over the pulleys 41 and imparts rotation thereto. It will be noted that the belt 52 travels in the farside grooves of the pulleys 41.

A fourth belt 53 is trained over the

pulleys

35 and 41 and travels in the farside grooves of pulleys 35 and the near side grooves in the pulleys 41 as viewed in Figure 3.

In the operation of the machine, the motor 48 will cause the rotation of the drum and carry the grinding element 27 around the article to be ground and in a circular orbit. rIhe driving motor 49 rotates the pulleys 41 upon the stationary ring frame 4 and cause the rotation thereby of the belt 53 for rotating pulleys 35 which in turn rotate the belt 44 for rotating the grinding element 27 as it travels in its circular orbital path. Thus it will be apparent that the article acted upon will be uniformly ground into true circular form.

It will be appreciated that this novel grinding machine avoids the use of gears and utilizes instead a system of belting which is more or less flexible in use as a certain amount of yield or slippage may take place. It will be further evident that due to the adjustable feature of the ring frame, it is always possible to have the same concentric with the article to be ground.

I am aware that many changes may be made and numerous details of construction may be varied through a wide range without departing from the principles of this invention, and I, therefore, do not purpose limiting the patent i granted hereon otherwise than necessitated by the prior art.

I claim as my invention:

1. In a grinding machine, a normally stationary ring-like frame, a cylindrical member associated with said frame for rotation with respect thereto, an adjustable hanger carried by saggi member, a grinding element journalled upon said hanger, pulleys upon said member, a pulley attached to said grinding element, a belt trained over said pulleys and said pulley on the grinding element, pulleys mounted upon said frame, a belt trained over the pulleys on said frame and over the rst mentioned pulleys, means for driving the last mentioned belt and means for rotating said cylindrical member.

2. In a grinding machine, a supporting base, a ring-like frame supported upon said base for circumferential adjustments, a rotatable member journalled upon said frame, a hanger on said member, a grinding element journalled upon said hanger, a pair of brackets extending radially from said rotatable member, pulleys upon said brackets, a grinding element journalled upon said hanger, a pulley associated with said grinding element, a belt trained over the pulleys on said brackets and over the last mentioned pulley, pulleys journalled upon said ring-like frame, a belt surrounding the last mentioned pulleys and the pulleys on said brackets, means for driving the last mentioned belt and means for rotating said member.

3. In a grinding machine, a supporting base, a ring-like frame pivoted upon said base, means for adjusting said frame, a cylindrical member journalled in said frame for rotational movements, a hanger carried by said member, a grinding element carried by said hanger, a pulley attached to said grinding element, pulleys upon said cylindrical member, a belt trained over said pulley and pulleys, pulleys upon said ring-like frame, a belt trained over said last mentioned pulleys and the pulleys upon said member, a third belt trained over the pulleys upon said ring-like frame, means for driving said third belt, and means for rotating said cylindrical member.

4. In a grinding machine, a frame having a circular bearing, a cylindrical member journalled in said bearing, a grinding element carried by said member, a pulley attached to said grinding element, pulleys upon said member, a belt trained over said pulley and pulleys, pulleys upon said frame, a belt trained over the pulleys on said frame and on said member, means for rotating said cylindrical member, means for rotating the pulleys on said frame for operating the belt thereon and the rst mentioned belt, and means for adjusting said frame.

5. In a grinding machine, a supporting base, a ring-like frame pivoted to said supporting base for arcuate adjustment, a rotatable cylindrical member associated with said ring-like frame, means for rotating said member, a bracket carried by said member and extending toward the center thereof, a grinding element rotatably mounted upon said bracket, pulleys mounted upon said rotatable cylindrical member, a pulley attached to said grinding element, a'belt trained over said pulleys and pulley, pulleys mounted around said ring-like frame, a secondr belt trained over the pulleys on said frame and the pulleys on said rotatable member, and a motor driven belt'trained over the pulleys on said frame for operating the same for driving said second belt.

GEORGE HERZOG.