US1606652A - Cylinder-grinding machine - Google Patents

Description

Nov. 9,1926. 1,606,652

R. J. MARVIN ET AL CYLINDER GRINDING MACHINE Filed Jan. 16, 1925 65 Shets-Sheet 1 )2 (LEM mvr-zu'roka ATTORNEY Nov. 9 1926.

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R. J. MARVIN ET AL Filed Jan. 16, 1925 3 Sheets-Shed 2 I Z 1 z I 6 A 4 gi 4167*. j I (if o J I 1 01; g m o gt UN 17 35 1 4 4/ I J fi I J59 7 5 I J I J (X0 5 Z 6 3/ J4 fl mvem'ons gs wm m ATTORNEY Nov. 9, 1926. 4 1,606,652

R. J. MARVIN ET AL CYLINDER GBINDING MACHINE Filed an. 16, 1925 s Sheets-Sheet 5 2/ 5 i1 'Ilill Y if JZ M x7 1 if (if JJ' 9 m a ZZZ/ 1012272 6 1E mvzu'rons ATTORNEY Patented Nov. 9,

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RALPH JACOB MARVIN AND CHARLES RICHARD MCMINN, OF LOS ANGELES, CALIFORNIA.

CYLINDER-GRINDING I'viACHINE.

Application filed January 16, 1925.

This invention relates to a machine for boring out or grinding the cylinders of internal combustion engines, pumps and the like, and has for its object the provision of a novel machine adapted to be clamped or bolted upon a cylinder block of an engine or the like without it being necessary to re move the motor from an automobile or other place'where it may be permanently mounted, the device being provided with means for operating a grinding wheel or the like and trueing and dressing out the walls of a cylinder for the purpose of permitting the installation of new or over-sized pistons.

An important object is the provision of a machine of this character in which the grinding element is given a planetary movement or in other words it is forced to follow a circular path simultaneously with its rotation whereby all portions of the cylinder walls will be effectually dressed.

Another object is the provision of a machine of this character which is provided with a novel feed means whereby the grinding wheel or the like will bemoved longitudinally of the cylinder while the rotary movement is being carried out and in this way it is obvious that all portions of the cylinder wall will be trued.

An additional object is the provision of a device of this character which will be comparatively simple and inexpensive in manufacture, easy to operate and control, positive in action, eflicient and durable in service, and a general improvement in the art.

With the above and other objects and ad vantages in view, the invention consists in the details of construction to be hereinafter more fully described and claimed, and illustrated in the accompanying drawings in which:

Figure 1 is a side elevation of the complete device,

Figure 2 is a longitudinal section therethrough,

Figure 3 is a vertical section on the line 33 of Figure 2,

Figure a is a horizontal section on the line 44; of Figure 2,

Figure 5 is a horizontal cross section on the line 55 of Figure 2, and

Figure 6 is a detail section.

Referring more particularly to the drawings, the numeral 10 designates the base of the machine which might be formed Serial No. 2,882;

casting or of any desired number of parts suitably fastened together, which base is adapted to be bolted, clamped or otherwise secured upon the head of a motor, pump or the like which is intended to have the cylinders dressed out or trued. This base 10 constitutes the support for the entire machine, and mounted above one end portion of the base and suitably bolted or otherwise secured theretois a housing 11 which constitutes a bearing for a sleeve 12 carrying a gear 13 which may be formed integrally therewith. This sleeve is prevented from longitudinal movement by means of a ring nut 14 screwed thereonto and located and hearing within a recess 15 in the lower por tion of the housing or at the juncture of the housing with the base.

1 The numeral 16 designates a bearing sleeve held in place on the gear 13 by means of bolts or screws 17 which pass through elongated slots 18 in an outstanding flange 19 at the lower end of the sleeve 16 and which engage within suitable threaded holes 20 in the gear 13. In order that adjustment of'the sleeve 16 with respect to the gear may be made, we make use of a cam screw 21 which is adapted to be turned whereby to shift the sleeve 16 bodily with respect to the gear 13 so as to be eccentric with respect thereto. If desired, this screw may be graduated in any preferred manner in order to permit of accurate adjustment. Owing to the fact that this sleeve 16 may be shifted on the gear 13, it is obvious that there will be caused an eccentric motion when the gear 13 is rotated, and as the sleeve 16 carries the spindle for the grinding wheel to; be described it is obvious that the grinding wheel will have a circular motion in addition to the rotary movement imparted thereto by means to be described, this adjustment is of vital importance inasmuch as it enables the de vice to be used satisfactorily in grinding out cylinders of different diameters. Located within the sleeve 16 is the feed screw 22 which is tubular in formation and through which is journaled the spindle 23 upon the lower end. of which is suitably mounted and secured a. grinding disc 24: of emery, carborundum or the like. The spindle is incapable of longitudinal movement within the screw 22 and is suitably supported at its upper and lower ends by Timkenxor other suitable roller bearings indicated at l Secured upon the upper end of the spindle is a bevel gear 26 meshing with a bevel gear 27 carried by a counter shaft 28 suitably journaled in a. bracket member 29 and adapted to be rotated in any desired manner by means of a motor or other power device. In actual practice it is probable that the feed of rotation of the spindle would be in the neighborhood of from three thousandv to five thousand revolutions per minute as this is a very satisfactory speed for the operation of the grinding wheel.

In order that the eccentric motion may be obtained, we provide a shaft 30 journaled in bearings 31 rising from the base 10 and carrying a bevel gear 32 meshing with a bevel gear 33 on the lower end of a counter shaft 34. journaled in a bracket extension 35 on the housing 11. The shaft 34 carries a pinion 36 meshing with the gear 13 for effecting rotation thereof. The shaft 30 may be driven in any desired manner by means of power or by engagement of a hand crank 87 thereon.

In order that the feed of the device may be accomplished so that the grinding wheel will be moved longitudinally of the cylinder, we provide a shaft 38 journaled in suitable .bearings 39 and fOfll'ld adapted to be rotated by means of the above described crank handle 37 which is shown in the drawings as applied thereto, though it should be understood that if desired this crank handle might be removed and engaged upon the end of the shaft 80 though this is not illustrated. The shaft 38 carries a bevel gear il meshing with a bevel gear 42 on a shaft 43 with which is connected a tumbling shaft 4L4 which is in turn connected with a shaft d5 journaled through a bracket member 46 projecting from one side of a housing 16. lhe shaft 45 carries a spur gear a? meshing with an intermediate gear 48 journaled on a stub 49 carried by the bracket extension l6 and meshing with a gear 50 which is formed or otherwise provided with a hub 51 which is internally threaded and has screwed engagement with the feed screw 22. Longitudinal displace ment of the gear 50 is prevented by means of a grub s new 52 or the like which engages within a peripheral groove 53 in the hub of the gear. Obviously, when the shaft 38 is rotated the gear 50 will be driven and as its hub portion 51 is threaded and engaged upon the screw 22, the screw will be 'moved longitudinally, carrying with it the spindle 23 and grinding wheel 2a thereon.

The shafts 30 and 38 really operate in unison inasmuch as they are provided respectively with spur gears 5a and 55, which mesh as shown. The gear 55 is formed on acollar 56 upon which is mounted a spur gear 57 adapted to be brought into mesh with a spur gear 58 on the shaft 30. The collar 58 is grooved as shown at 59 and enaged within this groove is a forked end 60 f a shifting lever 61 which is pivoted at 62 upon a suitable bracket 63 and which is provided for the purpose of Shifting the men'ibers 55, $6 and 57 as a unit so as to bring the desired gears into mesh depending upon the direction in which it is desired to effect rotation of the feed screw. Obviously there must be an intermediate gear in order to eii'ect reverse rotation.

l Vhcn the gear 13 is rotated as above described and the reciprocatory movement is accomplished, it is quite obvious that the sleeve 16 and parts carried thereby will move with respect to the base and mechaism mounted thereon. it therefore becomes necessary to compensate for this movement, and in carrying out this feature, we provide the extension 46 with an elongated slot 65 within w ich is engaged a roller v66 carried by a bolt 67 or the like which is threaded into the upper end of a bracket extension 68 on the bearing member 40. It is to compensate for this peculiar eccentric movement that we have provided the tumbling shaft a l connecting the shaft of the gears 42 and i7.

While it is of course true that the shaft members 28 and 30 may be separately operated we may find it convenientin some instances to effect simultaneous driving of these two elements. In order that this may be accomplished we provide a suitable flexible shaft 69 connected at one end with the shaft 28 and connected at its other end with a short shaft 70 journaled througlian extension on the bracket 31 and carrying a bevel gear T2 meshing with a bevel gear '73 on the shaft 30. y

-From the foregoing description and a study of the drawings it will be apparent that we have thus provided a simply constructed, easily operated and highly eiiicient machine which will readily operate to dress out, rebore or regrind and consequently true the cylinders on internal combustion or other types of engines, and which is also equally capable of use in connection with stationary motors, pumps or other devices without it being ncccssaryto dismount the engines from their associated parts or their permanent locations.

i v hile we haveshown and described the preferred embodiment of the invention,'it should be understood that we reserve the right to make such changes in the form,

construction and arrangement of parts as will not depart from the spirit of the invention or the scope of the subjoined claim.

Having thus described the invention, we claim:

In a machine of the character described, a base, a housing rising therefrom, a sleeve member rotatably mounted within the housing and carrying a gear, a bearing sleeve disposed upon the gear and formed with a radial slot, a securing member passing through said slot into said gear, cam means for shifting said bearing sleeve with respect to said gear whereby to be eccentriethereto, a tubular feed screw journaled and slidable through the bearing sleeve, a nut member rotatably mounted at the upper end of the bearing sleeve and threaded onto said Screw, a spindle journaled through said screw and provided with means for efi'eoting rotation thereof, a grinding element carried by said spindle, said nut member being formed with a gear, an intermediate gear meshing with said last named gear, a drive gear meshing with said intermediate gear, an operating shaft, and a transmission between said operating shaft and the last named gear including a coupling shaft.

In testimony whereof we aifix our signa- 2 tures.

RALPH JACOB MARVIN. CHARLES RICHARD MoMINN.

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