Closed compressor
AssigneeHitachi, Ltd.
InventorsNobuo Abe, Gen Konno
Life of this patent
Estimating the term…
Abstract
In a closed compressor provided with a ball joint, there was needed a structure easy to assemble and capable of sufficiently supplying the lubricating oil to a ball joint section in order to ensure smooth sliding between a ball and a ball seat. The closed compressor is provided with a ball joint section. In the ball joint section, flat cut portions are formed in the outside diameter of the ball of the connecting rod, parallel with the end face of a ring. Also a groove is formed for insertion of the ball into the ball seat from the end of the crankshaft side which is an open end of the piston. The groove has the same width as the width between the flat cut portions of the ball.
Claims11
A closed compressor comprising:
- a crankshaft for transmitting a torque from an electric motor;
- a piston provided with a ball seat having a spherical section on the crankshaft side;
- and a connecting rod having a ball portion on one end for connection with said ball seat, a ring portion on the other end which fits on said crankshaft, and a rod portion for connection between said ring portion and said ball portion;
- said ball portion having two flat surfaces which are in parallel with the open end faces of said ring portion;
- said ball seat provided with an insertion port which has at least the same width as the width between said two flat surfaces of said ball portion;
- and a space formed by said flat surfaces of said ball portion, said insertion port, and a spherical section of said ball seat.
A ball joint method of a closed compressor having a ball on one end of a connecting rod which connects a piston to a crankshaft, said ball being slidably connected to a ball seat formed in said piston, wherein said ball is provided with flat cut portions on both sides of its outside diameter, with cut surfaces mutually opposed, in parallel with the end faces of a crankshaft formed on the opposite side of said ball of said connecting rod and a ring portion sliding on said crankshaft;
- an insertion groove is provided in said ball seat of said piston to allow the insertion of said ball having said flat cut portions;
- and after the insertion of said ball in a slidable state into said ball seat via said insertion groove, said ball and said piston are turned through about 90 degrees, to thereby form spaces between said insertion groove of said piston and said flat cut portions of said ball, exposing a part of said ball seat of said piston.
Dependencies are inferred from the claim text.