US1331052A - Machine for truing connecting-rod bearings - Google Patents

Description

C. E. DAVIS.

MACHlNEfOR TRUING CONNECTING R00 BEARINGS. APPLICATION FILED AUILZB. I9Ia.

1,331,052. A Patented Feb. 17,1920.

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MACHINE FOR TBUING CONNECTING-BOD GS.

Specication of Letters Patent.

Patented Feb. 17, 1920.

Application led August 28, 1918. Serial No. 251,857.

To all whom t may concern:

Be it known that I, CECIL E. citizen of the United States, Montezuma, in the county of Gray and State, of Kansas, have invented certain new and useful Improvements in Machines for Truing Connecting-Rod Bearings, of which the following is a specification.

My invention relates to a machine for cutting or truing the bearings of connecting rods or pitmen, of internal combustion engines, such as automobile engines, while not necessarily restricted to this use.

important object of the invention is to provide a machine of the above mentioned character, adapted to true or cut the bear- DAvI's, a residing at in quickly and accurately and which is adjustable for coaction with connecting rods or pitmen of different sizes.

'Other objects and advantages of the invention will be apparent durlng the course of the following description. In the accompany' g drawings, forming a part of this specification and in which like numerals are employed to designate like' parts throughout the same,

Figure 1 1s a side elevation of apparatus embodying my invention, parts being shown in central vertical longitudinal section,

Fig. 2 is a horizontal sectional view taken on line 2-2 of Fig. 1,

Fig. 3 is a transverse vertical sectional view taken on line 3-3 of Fig. 1, and

Fig. 4 is a similar view taken on line 4 4 of Fig. 1.

In'the drawings, wherein for the purpose of illustration is shown a preferred embodiment of my invention, the numeral 5 desig nates a base or support, rovided near one end with longitudinal anges or rails 6, spaced as shown. A slide 7 is mounted for lon itudinal adjustment upon the flanges 6, an may be clamped thereto by a bolt 8, as shown.

The base 5 is provided near and spaced from its opposite end with a transverse rail or flange 9, upon which is mounted the two parts 10 of a transversely adjustable slide. These arts are adapted to be drawntogether y a bolt 11, equipped with a thumb nut 12. The two parts are adapted to be clamped or locked to the transverse flange or rall 9, by a clamping bolt 13, as shown.

Arranged near the same end of the base 5, and outwardly of the transverse flange 9, is a vertical opening 14, formed through an upstanding boss 15, as shown.

Arranged above the base 5 is an upper preferably horizontal support 16, which is similar in shape to the base 5 and provided between its ends with a pair of openings 17, receiving the reduced screw-threaded ends of rods 18. These rods are vertically disposed and are rigidly secured to the base 5, as shown at 19. The horizontal support 16 is clamped to the upper ends of the vertical rods 18 by nuts 20 or the like.l

The upper horizontal support 16 is provided centrally-thereof with a longitudinal opening or slot 21, within which is arranged the upper screw-threaded end 22 of a longitudinally adjustable vertical shaft 23. This upper screw-threaded end carries a head 24, arranged upon the top of the support 16. The screw-threaded end is adapteckto slide within the opening or slot 21, and theshaft 23 may be clamped or locked to the support 16, by manipulation of a thumb nut 25,

carried by the screw-threaded portion 22, as

shown. The' lower end of the shaft 23 is screw-threaded, as shown at 26, for engagement with a clamping nut 27, engaging a washer 28 or the like. The longitudinally adjustable slide 7 is provided with an upwardly extending member orl boss 29, which is tubular and has a longitudinal bore or opening 30. The boss 29 is externally screwthreaded, as shown at 31, for engagement with a screw-threaded clamping element or nut 32, as shown. The shaft 23 has its lower screw-threaded end projecting into the bore 30, but has no screw-threaded engagement therein.

I provide a cutting or truing device, comprislng a vertically screw-threaded shaft 32', operating within a screw-threaded opening 33, formed in one end of the support 16. At its upper end, the screw-threaded shaft 32 has a crank 34, rigidly secured thereto, for turning it. The lower end of the shaft 32 operates within the tubular boss 15, and is steadied and guided thereby. Near its lower end,'the shaft 32 is provided with a head 35, having a transverse opening, for the reception of the shank of a cutter 36, this shank being clamped therein Iby a bolt 37.

The numeral 38. designates a connectin rod or pitman rovided at its forward en with a bearingead 39, receiving therein a bearing or bushing 40, to be cut or trued.

At its opposite vend the connecting rod or pit-man 38 carries a sleeve or bearlng 4l, receiving the transverse pin of the plston, as is well known.

In the use of my apparatus, the slide 7 is longitudinally adjusted, in accordance with the length of the connecting rod or piston 38, to be placed in the machine. The pitman 38 is then arranged in the position, as shown in Figs. 1 and 2, with the forward portion thereof disposed within and between jaws 42, formed upon the parts 10. The sleeve 41 then passes over the screw-threaded boss 29, and contacts with the nut 32. The vertical shaft 23 is now brought to the position shown in Fig. 1, and the thumb nut 25 manipulates to clamp the same to the support 16. The clamping nut 2T is now turned whereby the sleeve 41 is securely clamped between the nuts 27 and 32. The thumb nut 12 is now turned for clamping the forward portion of the 'pitman 38 between the parts 10. These several parts ,having been thus adjusted, the pitman is rigidly held against displacement, whereby the cutter 36 may be arranged within the bearing or bushing 40, as illustrated in Figs. 1 and 2. Upon turning the screw-threaded cutter shaft 32', the cutter is rotated in contact with the .bearing or bushing, and is also fed longitudinally thereof. After the bearingy has been cut or trued, the pit-man may be removed from the machine, by the reverse of the vabove operation.

It is to be understood that the form of my invention herewith shown and described is to be taken as a preferred example of the same, and that various changes in the shape, size, and arrangement of parts may be resorted to without departing from the spirit.

of my invention or the scope ofthe subjoined claims. Having thus described my invention, I claim z- 1. The combination with a base, of a suport arranged above the same and extending longitudinally thereof, means to rigidly connect the support and base, an adjustable clamping device connected with the base and support and adapted to be adjusted longitudinally thereof, said clamping device being adapted to hold the sleeve carried by on'e end of a connecting rod or pitman having a bearing at the opposite end, a second clamping device connected with the base and adapted to receive the pitman or connecting rod, and a cutting element connected with the support and adapted to operate within the bearing.

2. The combination with a base, of a suprt arranged above the same andv extending longitudinally thereof, means to rigidly connect the base and support, a slide mounted to move longitudinally of the base near one4 end thereof, a clamping element carried by the slide, a shaft connected with the support and ada tudinally thereo a clamping element adjustably connected with the ,shaft and arranged to coact with the first named clamping element, an adjustable clamping'device connected with the base near the opposite end thereof, and a cutting device connected with the support and base and arranged nea-r the second named clamping device.

3. The combination with'a base having a support mounted thereabove, of a slide adjustable on said base and having a screw threaded member, a clamping element adjustably secured to said support and engaging the screw threaded member, a coacting clamping element carried by said member, said clamping elements being adapted to engage and hold one end of a pitman, a device connected with the base and adapted to receive and hold the opposite end portion of the pitman, and a cutting element connected with the support and adapted to rotate within the bearing of the pitman.

4. The combination with a base, of a support arranged above and extending longitudinally of the base in approximately parallel relation thereto, means for connecting the sup rt and base, an adjustable clamp- -ing device connected with the base and support and adapted to 'be adjusted longitudinally thereon, said clamping device being adapted to engage-with one end of a pitman, a second clamping device connected with the base and Iadapted to engage with the opposite end portion ofthe pitman, and a cuttin element adapted to operate within the bearing of the pitman.

5. An apparatus of the character described, as a sub-combination, a base, va support extending longitudinally of the base in approximately parallel relation thereto, said support being provided with 'a longitudinal openin meansto connect the support with the ase, a substantially vertical shaft having its lower end screw threaded and its upper end extending into the longitudinal opening of the support, means to clamp the upper end of the shaft to the sup-l port, a clamping element having screw threaded engagement with the lower screw threaded end of the shaft, a slide longitudinally adjustably mounted upon the base and provided with a tubular extension receiving the lower end of the shaft and being exteriorly screw threaded, and a coacting clamping element engaging the exteriorly screw threaded tubular extension.

In testimony whereof I aiix my signature in presence of two witnesses.

, CECIL E. DAVIS.

Witnesses:

ALFRED J. CLARK, RUSSELL MONNENGAN.

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