US2541412A - Cylinder block ridge grinder - Google Patents

Description

l eb. 13, 1951 E. F. FROST 2,541,412

CYLINDER BLOCK RIDGE GRINDER I Filed Oct. 25, 1948 2 Sheets-Sheet l Fig.

Edward F. Frost INVENTOR.

Feb. 13, 1951 v E. F. FROST 2,54

CYLINDER BLOCK RIDGE GRINDER Filed Oct. 25, 1948 2 Sheets-Sheet 2 5 Edward F. Fros/ INVENTOR' BY Qmaoifiw WWW a @M Patented Feb. 13, 1951 UNITED STAT ES PATENT OFF I 2,541,412

CYLINDER BLOCK RIDGE GRINDER EdwardF. Frost, Le Sueur, Minn;

Application October 25, 1948; Serial'No.'56,288"

2Glaims. I This invention relates to a device for dressing the inner surface of a cylinder and has for itsprimary object to efiiciently and conveniently remove the ridge from the top of worn cylinder blocks and toform a bevel on the top of the cylinder after removing the ridge so that new rings may be easily inserted and subsequent ring breakage and ring knocks will be obviated.

Another important object of this invention is to provide a cylinder ridge grinderhaving' adjustable means for holding the grinder inthedesired, correctly aligned position in a cylinder;

Another object of this invention is to provide means whereby the grinding wheels may be ad justed laterally inthe cylinder relative tothe retaining means and the operating means.

And yet another important object ofthisinvention is to provide means whereby the grinding wheel-and appurtenant driving parts may be movedaround in an orbit to carry out the grinding of the bore of a cylinder and to remove the ridge from the top of the block.

These and ancillary objects and other meritorious features are attained by this invention, a preferred-embodiment ofwhich is set" forth in the following description and illustrated in the accompanying drawings, wherein:

Figure 1 is a front elevationalv-iew of this'invention, showing the same in operation for removing the ridge from the top of the cylinder bore;

Figure 2 is a side elevational view of this invention;

Figure 3 is a top plan View ofthis invention;

Figure-4 is a cross sectional. view taken on line i'--4' of Figure 2;

Figure 5 is a verticalsectional view, showing the upper portion of the instantv invention in elevation;

Figure 6 is a cross sectional view taken. online 5-6 of Figure 5;

Figure '7 in an enlarged fragmentary View of a modified form of grinding wheel, and,

Figure 8 is a sectional view through the superimposed adjusting gears for securing the upper and lower pair of centering jaws in the cylinder to-operatively position the grinding wheel there- In carrying out this invention, generally designated by the character reference In, there is provided a casting [2 upon which. is mounted a conventional electric motor I4. A driving shaft I6 extends downwardly from the motor and a cooling fan 18 is fixed thereon by means of a securing collar 26. The driving shaft extends vertically through the casting or housing l2. A miter gear 22 is fixed on the depending end of 2. the shaft and a ball bearing assembly24 is disposed on'the shaft-behind the gear.

A complementary miter gear 26 is disposed at right angles in meshing engagement with the gear 22 and is fixed on a transverse shaft 28. The shaft 28 is preferably square or hexagon in. cross section complementary tothe cross sectional shapeof the opening in the gear '26" and the collar 3% therefor so that the shaft can he slid in and out of the gear for adjustment purposes, as will be later described. Of course, a conventional ball bearing assembly 32 is disposed on the shaft in engagement with the collar 38, as seen'in Figure 5. A- miter gear 34 is" disposed on one end of the drivesha'ft 23=and acomplementary miter gear 36 is disposed at a-right'angle inmeshing engagement with the gear. The gear 36 is disposed on a chuck shaft 38 which"- is vertically and rotatably disposed in acasing All, having a lateral flang -42 which isbolted as at 44 to the-casing 46 for the drive shaftZB. Of course, ball bearing assemblies 48 and 50 are disposed at the upper and lower end of the chuck shaft, the shaft terminating upwardly in a knurled knob 52; complementary in use to the hand tightening chuck 54 within which is held a'cylindrical grinding wheel 56; Thus, to remove thegrinding wheel ortoinsert a grinding wheel in the chuck, the knurled-kno'b-B'Iis held and the chuckis rotated to open or close the jaws" of the same;

To adapt the grinding wheel 56 for'use. with various sized cylinder bores, means is provided for moving the same laterally with respect to the housing 12. In this respect, the drive shaft- 28 is di'spos'ed transversely in-the reduced lower end of the housing on which the casing 46v is slidably disposed. Theicasing includes parallel side members 58 and stl wh'ich are slidably. disposed in opposed channels or'guideways. on the reducedlower end of the housing. One of the ends of thebars is secured to abar'support and bushing 62.

Means is. provided for moving. the. casing, inwardly and outwardly with respe'ct to the housing I2 and comprises a shaft 64 which is rotatably but securely. attached atone end:to the flanged end: of the casing, theshank of the shaft being externally threaded and disposed through a transverse bore in the reduced portion of the housing 12. The opposite end of the shaft is rotatably mounted in a flange 66. Means is provided for actuating the shaft 64 laterally in the-housing to move the housing 4i! inwardly and outwardly relative to the: housing, I2 and preferably.- includes a worm gear- 10 having a threaded bore in which is received the threaded shaft 64. The worm gear acts as a feed nut for the feed screw 64. The worm 68' meshes with the worm gear and is secured at its opposite end to an operating rod 'II, the operating rod terminating in a conventional universal joint connection 12 which is affixed to a shaft upon which the worm is mounted. The rod H is bracketed by means of a bracket I4 and a bracket I6 to the side of the housing I2. The rod terminates in a knurled wheel 18, to which manual rotation can be applied for rotating the rod 7| and impart ing rotation to the worm 68 and correspondingly moving the shaft 64, lateral movement of the shaft producing a lateral movement of the bars 58 and 60 and correspondingly a movement of the casing 48 for the chuck shaft 38.

The housing I2 is rotatably disposed on a supporting member 80, the supporting member having means for engaging the bore of a cylinder or a like work piece. In this respect, the housing I2 and more particularly the reduced portion thereof terminates in a centrally apertured head 82. The supporting member or casting B is provided with an upraised tapered spindle 84, the same being rotatably disposed in the central aperture in the head 82. A set screw 86 is provided for selectively preventing and permitting rotation of the spindle 84 relative to the head 82. A hand wheel 88 is formed on the upper end of the housing I2 so that movement of the hand wheel moves the housing I2 about the spindle 84 and produces an orbit movement of the grinding stone 56, the same being rotated through the drive shaft 28 and the armature shaft I6 of the motor.

Means is provided for retaining the supporting member 80 within the bore 96 of a conventional cylinder 92 and comprises an upper set of .retaining jaws or arms 94 and a lower set 96. A sectional shaft 98 is vertically disposed in the center of the supporting member 88 and has secured on its opposite end a pair of operating gears or gear plates I08 and I82. The operating gears upon being rotated rotate the shaft 98 and the plates I86 and I82 attached thereto. The plates are provided with spiral grooves engaging cooperating teeth on the jaws to move the centering jaws 9 and 96 inwardly and outwardly with respect to the casting or supporting member 88. In this respect, a pair of diagonally placed operating shafts I04 and I66 extend into the casting 80 and are provided with gearends I08 and III]. The gear I68 is disposed in meshing engagement with a gear I I2 secured to the upper section of the shaft 98, while the gear I I6 is in meshing engage- I ment with a gear I I4 secured to the lower section of the shaft. Thus, rotation of the actuating shaft I64 will rotate the gear H2 and the upper section of the shaft 98 and accordingly the operating plate I62 will actuate the upper set 94 of centering jaws. In a similar manner, rotation of the operating rod I66 will rotate the gear [I4 and the operating plate I 86 to move the lower set of jaws inwardly and outwardly.

The operating rods I64 and I86 are formed at their upper ends with square heads H6 complementary to a socket wrench II8 for rotating the same. 7

Means is provided for conducting a supply of electrical energy to the electric motor from a suitable supply source and includes an electrical conductor I I8 which is connected to commutator brushes I28 carried by a brush ring I22. Slip rings I24 and I26 are disposed in wiping contact with the brushes, so that as the casting I2 is rotated on the supporting member by the hand wheel 88, the slip rings I24 and I26 are rotated within the brushes of the brush ring, the same being stationary, so that the conductor H8 is prevented from being tangled.

Attention is now directed to Figure 7, wherein there is illustrated the means provided for beveling the top of the cylinder after removing the ridge, as shown in Figure 5. In this respect, a grinding stone I28 is provided, the same including a tapered or conical body section I30 and an annular reduced end I32 and an upper disk-like end I34. It can thus be seen that when the conical intermediate section or tapered section I30 engages the top of the cylinder, it, as it rotates, imparts a bevel to the same. Another form of grinding wheel is illustrated in Figure 8, wherein the same includes complementary superimposed tapered wheels I86 and I38.

Thus, it can be seen that there is provided a novel and improved grinder, which is adapted for removing the ridge from the top of worn cylinder blocks. However, it is to be understood that the same can be employed effectively and dependably in grinding various other work pieces and in various other operations, wherein another tool could be substituted for the grinding stones 58 and I28. Accordingly, it is to be understood that while only one embodiment of this invention has been discl osed, that other embodiments and changes in details of structure may be carried out, the same coming within the spirit of the invention and the scope of the appended claims.

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

l. A grinding device comprising: a supporting member adapted to be inserted in the work piece, said supporting member having a sectional shaft journalled therein, gearing means mounted in said supporting member for rotating said shaft, a plurality of plates on said shaft and rotatable therewith, said plates being provided with spiral grooves, jaws mounted in said member having teeth cooperating with said plates and being laterally reciprocated thereby, said jaws being engageable with the walls of the work piece for support, a housing rotatably mounted on said supporting member, a tool rotatably carried by said housing and laterally movable thereof, and actuating means mounted on said housing for rotating said housing and tool for moving said tool in an orbit about said housing.

2. A grinding device comprising: a supporting member adapted to be inserted in the work piece, said supporting member having a sectional shaft journalled therein, gearing means mounted in said supporting member for rotating said shaft, a plurality of plates on said shaft and rotatable therewith, said plates being provided with spiral grooves, jaws mounted in said member having teeth cooperating with said plates and being laterally reciprocated thereby, said jaws being engageable with the walls of the work piece for support, a housing rotatably mounted on said supporting member, a tool rotatably carried by said housing and laterally movable thereof, and actuating means mounted on said housing for rotating said housing and tool for moving said tool in an orbit about said housing, rotating means mounted within said housing and for driving said tool and the grinding wheel thereon for grinding the work piece.

EDWARD F. FROST.

(References on following page) REFERENCES CITED The follbw ing references are of record in the file of thief patent:

UNITED STATES PATENTS Number Name Date 1,927,898 Myers Sept. 26, 1933 2,016,574 Myers Oct. 8, 1935 2,295,516 Hoelscher Sept. 8, 1942 Number Number Name Date Rohrdanz Sept. 29, 1942 Berezny Dec. 5, 1944 FOREIGN PATENTS Country Date Germany Aug. 1, 1921 Great Britain Apr. 27, 1933

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