Drive device provided with XY-separating crank mechanism

A drive device for an engine comprising:

• a first drive unit including a first crankshaft and provided on one side of a central reference plane;
• a second drive unit including a second crankshaft, having a structure identical to that of the first drive unit, and disposed on an opposite side of the central reference plane, to be symmetrical to the first drive unit with regard to the central reference plane;
• and
• a coupler-synchronizing mechanism which couples the first crankshaft and the second crankshaft to rotate the first crankshaft and the second crankshaft in a synchronous motion with each other in opposite directions to each other,
• the first drive unit comprising:
• a first cylinder;
• a first piston in the first cylinder reciprocatively along a first direction;
• a first crankshaft extending orthogonal to the first mount plane and including a movable axis of the first piston along the first direction;
• and a first XY separation crank mechanism between the first piston and the first crankshaft within the first mount plane, which converts reciprocating motion of the first piston and rotary motion of the first crankshaft into each other;
• the second drive unit comprising:
• a second cylinder;
• a second piston in the second cylinder reciprocatively along a second direction symmetrical to the first direction with regard to the central reference plane;
• a second crankshaft extending orthogonal to the second mount plane and including a movable axis of the second piston along the second direction and located to be symmetrical to the first mount plane with regard to the central reference plane;
• and a second XY separation crank mechanism between the second piston and the second crankshaft within the second mount plane, which converts reciprocating motion of the second piston and rotary motion of the second crankshaft into each other;
• the first XY separation crank mechanism comprising:
• a first support member provided reciprocatively along the first direction, including a first support portion extending along the first direction and a second support portion extending from the first support portion along a third direction orthogonal to the first direction within the first mount plane;
• a first crank connection member mounted reciprocatively to the first support member along the third direction within the first mount plane, to which a crankpin of the first support member is engaged rotatably;
• and a first coupling member which couples the first piston and the first support member with each other, and
• the second XY separation crank mechanism comprising:
• a second support member provided reciprocatively along the second direction and including a first support portion extending along the second direction;
• a second support portion extending from the first support portion along a fourth direction orthogonally to the second direction within the second mount plane;
• a second crank connection member mounted to the second support member reciprocatively along the fourth direction within the second mount plane, to which the crankpin of the second crankshaft is engaged rotatably;
• and a second coupling member which couples the second piston and the second support member,
• the second support member, the second crank connection member and the second coupling member being symmetrical respectively to the first support member, the first crank connection member and the first coupling member of the first XY separation crank mechanism, with regard to the central reference plane.

A drive device for an engine comprising:

• a first drive unit including a first crankshaft and provided on one side of a central reference plane;
• a second drive unit including a second crankshaft, having a structure identical to that of the first drive unit, and disposed provided on an opposite side of the central reference plane, to be symmetrical to the first drive unit with regard to the central reference plane;
• and
• a coupler-synchronizing mechanism which couples the first crankshaft and the second crankshaft to rotate the first crankshaft and the second crankshaft in a synchronous motion with each other in opposite directions to each other,
• the first drive unit comprising:
• a first cylinder;
• a first piston in the first cylinder reciprocatively along a first direction;
• a third cylinder coaxially with the first cylinder;
• a third piston in the third cylinder reciprocatively along the first direction;
• the first crankshaft provided between the first piston and the third piston and extending orthogonal to a first mount plane which includes a movable axis extending along the first direction;
• and a first XY separation crank mechanism provided between the first piston and the third piston and the first crankshaft within the first mount plane, which converts the reciprocating motion of the first piston and the third piston and the rotary motion of the first crankshaft into each other;
• the second drive unit comprising:
• a second cylinder;
• a second piston in the second cylinder reciprocatively along a second direction symmetrical to the first direction with regard to the central reference plane;
• a fourth cylinder coaxially with the second cylinder;
• a fourth piston in the fourth cylinder reciprocatively along the second direction;
• a second crankshaft provided between the second piston and the fourth piston and extending orthogonal to the second mount plane including a movable axis of the second piston along the second direction;
• and a second XY separation crank mechanism between the second piston and the fourth piston and the second crankshaft within the second mount plane, which converts the reciprocating motion of the second piston and the fourth piston and the rotary motion of the second crankshaft into each other;
• the first XY separation crank mechanism comprising:
• a first support member provided reciprocatively along in the first direction;
• a first crank connection member mounted to the first support member reciprocatively along a third direction orthogonal to the first direction within the first mount plane, to which a crankpin of the first crankshaft is engaged rotatably;
• a first coupling member which couples the first piston and the first support member with each other;
• and a third coupling member which couples the third piston and the first support member with each other, and
• the second XY separation crank mechanism comprising:
• a second support member provided reciprocatively along the second direction;
• a second crank connection member mounted to the second support member, reciprocatively along a fourth direction orthogonally to the second direction within the second mount plane, to which a crankpin of the second crankshaft is engaged rotatably;
• a second coupling member which couples the second piston and the second support member;
• and a fourth coupling member which couples the second piston and the fourth support member.