Патент USA US2132640код для вставки
Oct. 11, 1938. 2,132,640 E. s. MUMMERT ’ GRINDING MACHINE 7 Filed July 18, 1936 2 Sheets-Sheet l ‘2 m ‘b m N. .90 ‘N N INVENTOR ERVIN 5. 'MUMMERT ATTOR N EY Oct. 11, 1938. _ E_ 5, MUMMERT ‘ 2,132,640 GRINDING MACHINE Filed July 18, 1936 2 Sheets-Sheet 2 3627 25_ INVENTOR ERV\N S. MUMMERT' ATTO R N EY Patented Oct. 11,1938 . I ~ ' n _ 2,132,640 ‘UNITED STATES PATENT orrlcc GRINDING MACHINE ‘ Ervin S. Mummert, Hanover, Pa“, assignor to Mummert-Dixonl Company, Hanover, Pa., a corporation of Pennsylvania Application July 18, 1936, Serial No. 91,257 ' 3 Claims. circle a similarly formed pulley on the shaft l8 of the grinding wheel l3, said pulley being machines ‘ known as swing frame grinders in which the machine is suspended from-an over- covered by a suitable hood or guard l9, as shown in Fig. 1. ‘ '5 head support by a ?exible element such as a chain, cable or the like. > wheel head frame l2 by, means of bolts 2|. improved swing frame grinding machine which Projecting from the grinding wheel hood 20 is suspended in such a way that both longitudinal are handles 22 for the operator of the‘ machine. 10 and lateral adjustments may be made, so’ that the machine will be perfectly balanced without the necessity of employing any additional balancing weights or the like. v ' ~ ’ ofv the machine. ‘ n ' of said grinding wheel being offset at one end in the manner shown in Fig. 1, so as to provide a 15 support for the driving pulley (not shown) of the grinding wheel ‘l3. Extending lengthwise of the machine ,and covering the driving belts ll; is a cover 23 which 2 . -' Another object of the invention is to provide is preferably formed of sheet metal. - an ‘improved swing frame grinding machine of 'The motor 15 is vmounted‘on a suitable plat the character’ mentioned, which is simple in construction, and reliable and exact in function form 24 which is supported by the motor carry ing frame M as shown in Fig. 2. . under all conditions of service. ' ' 7 ' 20 Also supported by the motor carrying frame I4 ‘The invention also comprises certain new and useful improvements in the construction, ar- is a bracket 25 having a boss 26 for receiving one 25 end of an auxiliary or supplementary supporting rangement and combination of the several parts frame 21. of ‘which it is composed, as will be hereinafter more 'fullydescribed and claimed. ‘- V 7 'In ‘the accompanying drawings:—‘ - ‘ ‘ The supplementary supporting frame 21' com- ' prises a tube or section of heavy pipe which is somewhat shorter in length vthan the length of 30' ' Figure '1 is a plan of a swing frame grinding machine constructed according to the present the main supporting frame H. p - The outer end of the supplementary support invention ;' I n 7 Fig. '2; is a side elevation of the structure shown ' " ' 35 in Fig. 1;' _ ing frame 21 is secured to a suitable connector or bracket 28. . n _ ‘ Fig. 3 is a ‘vertical ‘transverse section taken main body portion 29 which snugly ?ts themain 0n the line 3—3 0f Fig‘ 2; _ Fig. 4 is a similar section taken on the line supporting frame ll. Extending upwardly from the main body‘portion 29 of the connector or 4——4 of Fig- 2; and 40 \ ‘In the speci?c type of machine herein shown 10 and described, the grinding wheel I3 is shown disposed substantially in alinement with the end of the main supporting frame-H, the frame l2 ~Another object of the invention is- to provide 15 an improved swing frame grinding machine having its suspending arm or hanger adjustably mounted on a supplementary frame, ‘which latter in turn is adjustably mounted on the main frame 3()_ The grinding wheel I3 is also partly covered 15} by a hood or guard 20 ‘which is fastened ‘to the An object of the invention is to provide an 25 (01. 51'_99) This invention relates -to grinding machines and more particularly to the type of grinding ' _' ‘ ’ bracket 28 is an arm, the upper end of which is Fig. 15 is a similar section taken on the line 5-5 of Fig. 2. > I ' t The connector or bracket 28 is formed with_a 3? 5 ‘ Referring to the drawings, ' the improvedv grinding machine Comprises a main Supporting frame II, which is preferably though not neces45 sarily constructed of a suitable length of heavy pipe or tubing. Mounted on one end of the main supporting frame II is a wheel head frame 12, which supports a grinding wheel l3. 50 Mounted on the opposite end of the main supporting frame I l is a motor carrying frame l4, upon which is mounted an electric motor l5. Theshaft of the electric motor I5 is provided with a pulley l?'having grooves formed therein 55 for a plurality of belts ll. The belts I1 en- \ formed with a slot 30 through which is inserted 4t) the shank ‘of a bolt 3! which is employedfor securing theouter free end of the supplementary, supporting frame 2'! to the connector or bracket 28. The main body portion 29 of the connector or 43 bracket 28 is rigidly secured to the main sup porting frame H by means of set screws 32 (see Fig. 5). The bracket 25 which supports the inner end of the supplementary supporting frame 21 is 50 adjustably mounted on the motor carrying frame M for sliding movement transversely of the ma chine. For this purpose the base of the bracket 25 is formed with slots 33, as shown in Fig. 1, for the reception of the shanks of bolts 34. 55 2 2,132,640 Loosely mounted on the supplementary sup porting frame 21, is a bearing 36, for a sus pending arm or hanger 31. The bearing 36 is retained in position against longitudinal movement with respect to the sup plementary supporting frame 21 by means of collars 38. 10 The collars in turn are rigidly se The transverse balance of the machine is effected by moving bracket 25 and the connector 28 in such a way that the supplementary supporting frame is shifted transversely with respect to the main supporting frame vl l. The longitudinal balance is obtained by shifting the position of the hanger bearing 36 inwardly or outwardly of cured to the supplementary supporting frame 21 the supplementary supporting frame 21. In this by means of set screws 39. The lower end of the suspending arm or way both transverse and longitudinal balance of the machine can be readily obtained without the 10 hanger 31 is pivotally connected to the bearing 36 by means of a pin 40 which is carried by the bearing 36 in the manner clearly shown in Fig. 4. The pin 40 is transversely disposed so that the 15 hanger arm 31 is free to swing in a direction lon— gitudinally of the machine, and since the bearing 36 is loosely mounted on the supplementary sup porting frame 21, said bearing and the suspend ing arm or hanger 31 pivotally connected there 20 to, are free to swing in a direction at right angles to the longitudinal swinging movement which can be partaken of only by the suspending arm or hanger 31. As shown in Fig. 4, the lower end of the sus 25 pending'arm or hanger 31 is connected to the bearing 36 at a point offset to the main support ing frame ll of the machine. The upper end of the suspending arm or hanger 31 is laterally disposed with respect to 30 the main body portion thereof, and said upper end carries an eye 4| for the reception of a hook or other device (not shown) on the lower end of a chain or cable from which the machine is adapt ed to be suspended. In order that the machine 35 can be moved in all directions, the eye 4! is loose ly connected to the upper end of the suspending arm or hanger 31 by a swivel joint of any ap proved type. use of any additional balancing weights. Having thus described my invention, what I claim is:— 1. A grinding machine comprising an elon gated supporting frame with a power unit at one 15 end, a grinding tool at the other end, driving connections between the power unit and the grinding tool, a supplementary supporting frame superposed with respect to the main supporting frame, means for shifting the relative position 20 of the supplementary supporting frame laterally with respect to the main supporting frame, a hanger, means for pivotally supporting said hanger on the supplementary supporting frame, and~means for adjusting, the hanger supporting 25 means longitudinally with respect to the supple mentary supporting frame whereby to balance the entire machine when the same is supported from said hanger. 2. In a grinding machine, an elongated main 30 frame, a motor supported by said frame at one end, a grinding tool supported by said frame at the other end, a driving connection between said motor and said grinding tool, a supplementary frame, adjustable means connecting one end of 35 said supplementary frame with said main frame at the ‘motor end thereof, a bracket rotatably mounted on an intermediate portion of said main When the machine is suspended by the arm or 40 hanger 31, it is adapted to be evenly balanced, and in order to obtain such balance after the frame, means for adjustably connecting the other parts have been assembled, ‘the bracket 25, the connector bracket 28, and the hanger bearing 36 versal joint for connecting the hanger with said are shifted until the entire machine is uniformly 3. A grinding machine comprising a’ main sup porting frame, a motor mounted on one end of 45 said main frame, a grinding tool mounted on the 45 balanced, it being assumed that the machine is suspended from a suitable ?exible element, as has been heretofore described, which is connected to the eye 4| of the arm 31. , When this adjustment of the above elements 50 has been effected, the bolts 3| and 34 and. set screws 39 are tightened, thereby retaining the movable parts of the machine relatively ?xed, so that the machine will remain in proper balance when put into use. In order to obtain correct balance of the ma 55 chine it was necesasry to provide means for shift ing the position of the suspending arm or hanger 31 with respect to the main supporting frame ll of the machine, and in order to effect such shift 60 ing of the hanger 31 it has been necessary to pivotally mount said hanger on an auxiliary or supplementary supporting frame which latter can also be shifted with respect to the main frame. end of the supplementary frame with. said bracket, a hanger, and means constituting a uni supplementary frame. - other end of said main frame, driving connections between the motor and the grinding tool, a sup plementary supporting’ frame paralleling the main frame and disposed in a plane above the main frame, means for adjustably connecting each end of said supplementary supporting frame to said main frame whereby the relative position of said supplementary supporting frame with re spect to the main frame can be shifted, a bearing loosely mounted on said supplementary support ing frame for rotary movements transversely with respect to‘said supplementary supporting frame, and a hanger pivotally‘connected to said bearing and adapted to swing in directions at 60 right angles to the transverse rotary -movements of said bearing. ~ ' ERVIN S. MUMMERT.