摘要:
A reciprocating piston machine (1) comprises a crankcase (2), a crankshaft (3), at least a piston (4) and a balancing system (6) for balancing at least reciprocating forces of the first order which act on the crankshaft (3) in the direction of movement of the piston (4) when the machine (1) is operated. The balancing system (6) comprises at least a counterweight (14) which is provided on the crankshaft (3). The counterweight (14) is positioned and adapted such that it compensates the reciprocating forces of the first order by substantially 50%. The balancing system (6) further comprises at least a drivable eccenter weight (15) which is rotatably connected to the crankcase (2) and positioned and adapted such that the resultant centrifugal force thereof is directed in a direction opposite to that of the counterweight (14) and is driven at similar speed as the crankshaft (3) albeit in opposite direction around an eccenter weight axis extending parallel to the crankshaft axis (8) when the machine (1) is operated. The weight and centre of gravity of the eccenter weight (15) is selected such that the resultant centrifugal force thereof is substantially equal to that of the counterweight (14).
摘要:
A reciprocating piston mechanism (1) comprises a crankcase (2), a crankshaft (3) which has at least a crankpin. The crankshaft (3) is supported by the crankcase (2). The mechanism (1) further comprises at least a connecting rod including a big end and a small end, a piston (12) being rotatably connected to the small end, a crank member (7) being rotatably mounted on the crankpin, and comprising at least a bearing portion (8) which is eccentrically disposed with respect to the crankpin, and having an outer circumferential wall which bears the big end of the connecting rod such that the connecting rod is rotatably mounted on the bearing portion (8) of the crank member (7) via the big end. The mechanism (1) further comprises a gear (13) which is fixed to the crank member (7), and an internal ring gear (14) which is disposed concentrically with respect to the crankshaft axis and which is fixed to and carried by an internal ring gear carrier (15). The gear (13) meshes with the internal ring gear (14) for rotating the crank member (7) with respect to the crankpin upon rotation of the crankshaft (3). The internal ring gear carrier (15) is connected to the crankcase (2) at an axial distance of the internal ring gear (14) and free from the crankshaft (3).
摘要:
A reciprocating piston mechanism (1) comprises a crankcase (15) and a crankshaft (2) which has at least a crankpin (4). The crankshaft (2) is supported by the crankcase (15) and rotatable with respect thereto about a crankshaft axis (5). The mechanism further comprises at least a connecting rod (9) including a big end (8) and a small end (10), a piston (11) which is rotatably connected to the small end (10), and a crank member (6) which is rotatably mounted on the crankpin (4). The crank member (6) comprises at least a bearing portion (7) and has an outer circumferential wall which bears the big end (8) of the connecting rod (9) such that the connecting rod (9) is rotatably mounted on the bearing portion (7) of the crank member (6) via the big end (8). The crank member (6) is provided with a crank member gear (12). The crank member gear (12) is an external gear, which meshes with at least an intermediate gear (13). The intermediate gear (13) is an external gear, which also meshes with an auxiliary gear (14). The auxiliary gear (14) is an external gear, which is fixed to an auxiliary shaft (16) that extends concentrically through the crankshaft (2). The crankshaft (2) and the auxiliary shaft (16) are rotatable with respect to each other.
摘要:
A reciprocating piston mechanism (2) is provided with a crankshaft (3) which is rotatably connected to a crankcase (5) and includes at least a crankpin (7), a connecting rod including a big end and a small end, a piston which is rotatably connected to the small end, and a crank member (13) which is rotatably mounted on the crankpin (7). The crank member (13) comprises at least a bearing portion (14) which is eccentrically disposed with respect to the crankpin (7) and has an outer circumferential wall (15) which bears the big end of the connecting rod such that the connecting rod is rotatably mounted on the crank member (13) via the big end. The reciprocating piston mechanism (2) is provided with a rotary mechanism for rotating the crank member (13) with respect to the crankpin (7). The crank member (13) is made of at least two parts which are fixed to each other around the crankpin (7). An internal combustion engine may be provided with the reciprocating piston mechanism (2).