Coulisse—eccentric motor
View Patent ↗The rod-free mechanisms are used for converting rotational motion into reciprocating motion and vice versa. The mechanism can be used in displacement pumps and compressors, as well as in internal and external combustion engines, cubic expansion engines, steam engines, hydro and pneumatic engines. Coulisse-eccentric motor automatically feeds and distributes the actuation fluid to the swept-volume capacities. Coulisse-eccentric motor is easy to manufacture, contains a minimum of parts, such as a housing, a coulisse and an eccentric, can be made entirely of ceramics, and allows converting the pressure difference between the two internal volumes of the coulisse into rotational motion on the shaft, and vice versa. Coulisse-eccentric motor in motion allows reversing, changing the shaft torque and compression ratio, while all engine components operate normally and are not subjected to excessive loads.
1 . A coulisse-eccentric motor comprising:
a housing;
a coulisse; and
an eccentric having a shaft on at least one of two side surfaces of the eccentric;
wherein the housing comprises two side walls connected by inserts, the shaft of the eccentric being configured to rotate in at least one of the two side walls, the coulisse being configured to perform a reciprocating motion between the two side walls of the housing;
wherein each of the inserts connecting the side walls of the housing has a surface-housing guide which serves as a guide for the coulisse, the surface-housing guide defining a straight line of a movement vector of the coulisse in the housing;
wherein the coulisse has surfaces sliding along the housing guides;
wherein the coulisse contains an inner chamber where the eccentric is located, the eccentric dividing the inner chamber into two internal volumes which are changed by rotation of the eccentric and movement of the coulisse;
wherein the inner chamber of the coulisse has two opposite working surfaces, on which the eccentric rotates, the two opposite working surfaces of the coulisse being located opposite each other at a distance sufficient for the rotation of the eccentric there between with a required clearance;
wherein the two opposite working surfaces of the coulisse have initial and final points which are touched by a working surface of the eccentric when the eccentric rotates,
wherein a straight line passing through the initial and final points on the two opposite working surfaces of the coulisse has an angle of inclination less than 90 degrees and more than 0 degrees relative to the housing guide; and
wherein the coulisse-eccentric motor further comprises at least one channel having holes for supplying and discharging a working fluid into the two internal volumes of the coulisse.
2 . The coulisse-eccentric motor according to claim 1 , comprising at least one channel passing through a body of the eccentric and the shaft of the eccentric.
3 . The coulisse-eccentric motor according to claim 1 , comprising at least one channel passing through a body of the eccentric and through one side wall of the housing.
4 . The coulisse-eccentric motor according to claim 1 , comprising additional inserts between the two side walls of the housing, and wherein the additional inserts connect the housing guides on both sides relative to the coulisse and do not limit the movement of the coulisse, and wherein two outer volumes of the coulisse are formed by the additional inserts, the two housing guides, a wall of the coulisse and the two side walls of the housing, and a body of the coulisse comprises channels having holes which connect one of the two internal volumes of the coulisse to one of the two outer volumes of the coulisse, said one of the two outer volumes of the coulisse being located on an opposite side relative to the eccentric.
5 . The coulisse-eccentric motor according to claim 4 , wherein the coulisse additionally comprises one or more inner chambers, each provided with the eccentric having a shaft.
6 . The coulisse-eccentric motor according to claim 5 , comprising at least one piston—coulisse stone which is located in a middle of the respective one of the one or more inner chambers of the coulisse between the two side walls of the housing, wherein the at least one piston—coulisse stone has a first surface sliding along the working surface of the eccentric, a second surface sliding along the two opposite working surfaces of the coulisse, and two other surfaces located on opposite sides relative to the eccentric which limit the two internal volumes of the coulisse, wherein the two opposite working surfaces of the coulisse serve as guides for the piston—coulisse stone, and wherein a surface area of the piston—coulisse stone which slides along the working surface of the eccentric is larger than an area of the hole on the working surface of the eccentric through which the working fluid is supplied or discharged into the two internal volumes of the coulisse.
7 . The coulisse-eccentric motor according to claim 6 , wherein a part of the housing or the coulisse that is in contact with the two internal volumes of the coulisse or the outer volumes of the coulisse has a surface that transmits at least one type of gas.
8 . The coulisse-eccentric motor according to claim 7 , wherein the shaft of the eccentric is arranged on one of the two side surfaces.
9 . The coulisse-eccentric motor according to claim 8 , wherein the eccentric shaft is made in a form of a separate shaft that is inserted into the eccentric, and the eccentric has a hole or recess into which the separate shaft is inserted.
10 . The coulisse-eccentric motor according to claim 8 , wherein the housing guide, the surface of the coulisse that slides on the housing guide, the working surface of the coulisse, and the working surface of the eccentric have an inclination relative to an axis of rotation of the eccentric.