US2365068A

US2365068A - Connecting rod regrinding machine

Info

Publication number: US2365068A
Application number: US429943A
Authority: US
Inventors: Sidney A Gerbig
Original assignee: Individual
Current assignee: Individual
Priority date: 1942-02-07
Filing date: 1942-02-07
Publication date: 1944-12-12
Anticipated expiration: 1961-12-12

Description

Dec. 12, 1944. 3 A GERBK, 2,365,068

CONNECTING ROD REGRINDING MACHINE Dive/liar Dec 12,, 19440 CONNECTING HOD REGRINDING MACHINE Filed Feb. '7, 1942 4 Sheets-Sheet 2 1 56 f n54 -j fl N v if? 62- 4mm a Inventor 41- 45 Swim 3y fl. fi e/6% l i s. A. GERBIG 2,365,068

Dec. 12, 1944. g GERBlG 2,3@5,@68

CONNECTING ROD REGRINDING MACHINE Filed Feb. '7, 1942 4 Sheets-Sheet 5 i944- 5A. GERBEG CONNECTING ROD REGRINDING MACHINE Filed Feb. '7, 1942 4 Sheets-Sheet 4 IIHHETR I uueutor Patented Dec. 12, 1944 4 UNITED STATES PATENT OFFICE CONNECTING ROD REGRIN DING MACHINE I SidneyA. Gerbig, Faribault, Minn. 7 Application February 7, 1942, Serial No. 429843 1 Claim. (c1. .29-'2 6) This invention relates to new and useful improvements in grinding machines, and more particularly to the machine for reconditioning insert-type connecting rods; such as are used in present day automobile engines.

The principal object of the present invention is to provide a grinding machine which includes a boring bar mounted in such a manner as to be cooperative with a portion of the operating mechanism that is used in the operation of grinding.

Another important object of the invention is to provide a machine of the character stated which includes a rotary work support which can be used either in conjunction with a boring element or with a grinding element.

Other important objects and advantages of the invention will become apparent to the reader of the following description.

In the drawings: 7

Figure 1 represents a side elevational view of the machine.

Figure 2 is a front elevational view of the ma- 7 chine.

Figure 7 is an inside elevational view of the ad- 1 -justab1e grinder carrier.

Figure 8 is a fragmentary detailed end elevational view of the spindle for the work table and feed means for the boring bar.

Figure 9 is a vertical. sectional View through the cylinder used for feeding the boring bar Referring to the drawings wherein like nu.- merals designate like parts, it can be seen that numeral 5 (see Fig. 4) is a substantially G- shaped frame having a horizontally disposed top portion 6 and a laterally disposed upstanding stump portion 1. This frame 5 is preferably a casting and is rimmed by a flange 8 to which certain elements of the machine are attached.

Extending downwardly from the top of the stump 1 is a cylindrical housing 9 in which a b hollow spindle I0 is located. This spindle exreceives the upper end of the spindle I0.

Numeral l9 denotes a work supporting table which is preferably of circular shape, the same having a central hub 20 from which reinforcing fins or 'webs 2| radiate to the periphery of the table. A skirt 22 depends from the hub and Suitable securing" means can be provided between the skirt 22 and the'spindle Ill.

A chip or smallp'article discharge opening 23 is formed in the hub portion of the table 19.

A bore is located through the hub portion 20 to receive a boring bar 24 which extends upwardly through a rest ring 25 which circumscribes the bore of the hub 20 and rests upon the table. It is upon this ring 25 that the bearing end a of a connecting rod 1) is disposed and held by clamp plates 26. These clamp plates each has one of its ends resting on a riser 21 while its other end rests on the bearing a and threaded studs 25 rise from the ring 25 and through openings in the plate 26, the same being equipped with nuts 28. Thus, the clamp plates 26 can be clamped against the bearing a to hold the bearing in place.

The bearing a is the usual main bearing of the connecting rod 1), while (2 denotes the wrist pin bearing, this bearing being disposed over a pintle 30 which rises from a gauge plate 3| slidable within a

guide

32, 32. A threaded member 33 rises through a slot 34 in the gauge plate 3| and is equipped with a nut 35 to the end that the nut can be tightened to secure the plate 3| in any desired adjusted position, there being a gauge or row of graduations 36 on the plate 3| to facilitate precise adjustment of the plate 31 and consequently the bearing a with respect to the boring bar 24.

The lower end of the boring bar 24 is connected by a pivotal yoke 31 to a drive shaft 38 operating through bearings 39, 40. An arm 4| extends laterally from the shaft 38 and is connected pivotally, as at 42, to a piston rod 43, this rod being connected to a piston 44 in a cylinder 45 which has fluid pressure conduits 46, 4? connected to the ends thereof. This cylinder 45 is used and the air or fluid pressure thereto controlled to the extent desired in feeding the boring rod 24 up wardly and downwardly. As can be'seen in Figure 4, a cutting tool 48 is provided-at the upper end of the bar 24.

Obviously, the cutting tool end of the bar 24 can be lowered into the recesses 23 whenever it is desired to use the grinder generally referred to by numeral 50. This grinder 50 comprises a mo tor 5| having an armature shaft 52 equipped with a grinding element 53. The motor 5| is secured to carriage 54 which is slotted at its inner side as at 55. The carriage plate 54 at one side of the slot 55 is formed with rack teeth 56 meshing with a pinion 51 located on a shaft 58, this shaft also having a bevel gear 59 thereon located in a pocket 60 of a slide body 6|. The carriage plate 54 has dovetail grooves 62, 62 therein for receiving correspondingly

shaped ribs

63, 63 on the slide body 6|.

A transversely extending shaft 64 extends into the slide body 6|, terminating at the pocket 60 where a beveled gear 65 is secured thereto and in mesh with the bevel gear 59. A hand wheel 66 is provided at the other end of the shaft 64 and the operation thereof results in rotation of the shaft 58 and upwardly or downwardly feeding of the carriage plate 54 to lower or raise the grinding element 53 with respect to the work. v

The slide body 6| has an elongated pocket 61 in the intermediate portion thereof for receiving a nut 68 which rises from the top 6 of the frame 5. A screw shaft 69 is disposed longitudinally in the slide body 6|, the same having its threaded portion disposed through the nut 68, while its outer end is provided with an operating wheel By rotating this wheel 10, the slide body 6| can be slid on the top portion 6 of the frame 5.

assumes A pivotal hand brake H is provided on the flange 8 of. the frame 5 and can be operated against the periphery of the table H! to slow the same up after power has been stopped.

While the foregoing specification sets forth the invention in specific terms, it is to be understood that numerous changes in the shape, size and materials may be resorted to without departing from the spirit and scope of the invention as claimed hereinafter.

Having described the invention, what is claimed as new is:

IA machine of the character described comprising a rotary Work supporting table, a boring bar endwise movable upwardly through the table into work supported thereon and retractable out of the work, a grinding unit mounted above the table and constructed and arranged to be lowered into work supported by the table when the boring bar is retracted, a hollow spindle for the table, drive means for the spindle, said boring bar being operative through the spindle, and means to move said bar endwise comprising a rock shaft, a yoke on one end of said shaft operatively connected to the lower end of said bar, a crank on the other end of said shaft, and pneumatic means for operating said crank.

SIDNEY A. GERBIG.