Carriage positioning device for a grinding machine

Claim 2

A grinding machine comprising at least one grinding wheel mounted for rotational displacement about the axis thereof, means for mounting a crankshaft having at least two axially spaced crankpins so that the axes of the crankpins and the axis of said grinding wheel are substantially parallel, means for radially displacing said grinding wheel relative to the crankshaft for selectively grinding a crankpin radially aligned therewith, base means including a plunger element, means for biasing said plunger element in a predetermined direction, and means for supporting said mounting means for selective displacement in a direction parallel to the axis of said grinding wheel, said mounting means including at least one notch, said notch having a predetermined location and being selectively configured so that said plunger element can be inserted therein and so that when said plunger element is inserted into said notch, displacement of said mounting means in a first direction will locate said plunger element at a first position against one side wall of said notch with one of the crankpins radially aligned with said grinding wheel and displacement of said mounting means in a second direction opposite to said first direction will locate said plunger element at a second location against a second side wall of said notch with the second one of the crankpins radially aligned with said grinding wheel, and means for axially displacing said plunger element from said first position to said second position while said plunger element is maintained within said notch.

Claim 3

A grinding machine according to claim 1, wherein said mounting means includes a plurality of notches each having a predetermined location and being selectively configured so that said plunger element may be sequentially inserted thereinto and so that when said plunger element is inserted into any one of said notches, displacement of said mounting means in a first direction will locate said plunger element at a first position against one side wall of said notch with one of the crankpins radially aligned with said grinding wheel and displacement of said mounting means in a second direction opposite to said first direction will locate said plunger element at a second location against a second side wall of said one notch with another one of the crankpins radially aligned with said grinding wheel, said axially displacing means comprising means for displacing said plunger element from said first to said second position while said plunger element is maintained within any one of said notches.

Claim 4

A grinding machine according to claim 1, wherein said mounting means further comprises a spacer bar having said notch defined therein.

Claim 5

A grinding machine according to claim 1, further comprising means for selectively withdrawing said plunger element from said notch.

Claim 6

A grinding machine comprising at least one grinding wheel mounted for rotational displacement about the axis thereof, means for mounting a crankshaft having at least four axially spaced crankpins so that the axis thereof and the axis of said grinding wheel are parallel, means for radially displacing said grinding wheel relative to the crankshaft for selectively grinding a crankpin axially aligned therewith, base means including a plunGer element, means for advancing said plunger element in a predetermined direction from a first position to a second position, means for retracting said plunger element in a direction opposite to said predetermined direction from said second position to said first position, and means for supporting said mounting means for selective displacement parallel to the axis of said grinding wheel, said mounting means including at least two notches, said two notches having predetermined locations and being selectively configured, so that said plunger element can be advanced and thereby inserted into said notches, so that when said plunger element is inserted into one of said notches displacement of said mounting means in a first direction will locate said plunger element at a first position against one side wall of said one notch with one of the crankpins radially aligned with said grinding wheel, so that after retraction of said plunger element out of said one notch and after subsequent insertion into said second notch further displacement of said mounting means in said first direction will locate said plunger element at a second position against one side wall of said second notch with a second one of the crankpins radially aligned with said grinding wheel, so that subsequent displacement of said mounting means, when said plunger element is inserted into said second notch, in a second direction opposite to said first direction will locate said plunger element at a third position against a second side wall of said second notch with a third crankpin radially aligned with said grinding wheel, so that after said plunger element has been again inserted into said first notch continued displacement of said mounting means in said second direction will locate said plunger element at a fourth position against a second side wall of said one notch with a forth crankpin radially aligned with said grinding wheel, and means for displacing said plunger element from said second position to said third position while said plunger element is maintained within said second notch.

Claim 7

A grinding machine comprising at least one grinding wheel mounted for rotational displacement about the axis thereof, means for mounting a crankshaft having at least four axially spaced crankpins so that the axis thereof and the axis of said grinding wheel are parallel, means for radially displacing said grinding wheel relative to the crankshaft for selectively grinding a crankpin axially aligned therewith, base means including a plunGer element, means for advancing said plunger element in a predetermined direction from a first position to a second position, means for retracting said plunger element in a direction opposite to said predetermined direction from said second position to said first position, and means for supporting said mounting means for selective displacement parallel to the axis of said grinding wheel, said mounting means including at least two notches, said two notches having predetermined locations and being selectively configured, so that said plunger element can be advanced and thereby inserted into said notches, so that when said plunger element is inserted into one of said notches displacement of said mounting means in a first direction will locate said plunger element at a first position against one side wall of said one notch with one of the crankpins radially aligned with said grinding wheel, so that after retraction of said plunger element out of said one notch and after subsequent insertion into said second notch further displacement of said mounting means in said first direction will locate said plunger element at a second position against one side wall of said second notch with a second one of the crankpins radially aligned with said grinding wheel, so that subsequent displacement of said mounting means, when said plunger element is inserted into said second notch, in a second direction opposite to said first direction will locate said plunger element at a third position against a second side wall of said second notch with a third crankpin radially aligned with said grinding wheel, so that after said plunger element has been again inserted into said first notch continued displacement of said mounting means in said second direction will locate said plunger element at a fourth position against a second side wall of said one notch with a forth crankpin radially aligned with said grinding wheel, and means for displacing said plunger element from said second position to said third position while said plunger element is maintained within said second notch.

Claim 8

A grinding apparatus according to claim 5, further comprising means for changing the direction of said mounting means after the second crankpin has been axially aligned with said grinding wheel.