Patent ID: 8746093

Claim:
An oil pumping unit, comprising: a belt ( 4 ); a foundation ( 11 ); a crown sheave ( 1 ); a frame ( 2 ); a support rod ( 3 ); a belt pulley ( 6 ); a pin shaft ( 7 ); a crank ( 8 ); a transmission shaft ( 9 ); and a bracket ( 10 ); wherein: a bottom of said frame ( 2 ) is disposed on said foundation ( 11 ); a top of said frame ( 2 ) is supported by said support rod ( 3 ); a top of said support rod ( 3 ) is hinge connected to said frame ( 2 ); a bottom of said support rod ( 3 ) is hinge connected to said foundation ( 11 ); said bracket ( 10 ) is disposed on said foundation ( 11 ); said transmission shaft ( 9 ) is disposed on said bracket ( 10 ); said crank ( 8 ) is disposed on said transmission shaft ( 9 ); said bracket ( 10 ) and said crank ( 8 ) are symmetric; said crank ( 8 ) rotates synchronously with said transmission shaft ( 9 ); said belt pulley ( 6 ) is disposed on one end of said crank ( 8 ) via said pin shaft ( 7 ); one end of said belt ( 4 ) bypasses said crown sheave ( 1 ), and is connected to a smooth sucker rod; an other end of said belt ( 4 ) is wrapped on said belt pulley ( 6 ); two or more of said pumping units are serially connected; said crown sheave ( 1 ), said frame ( 2 ), said support rod ( 3 ), said belt ( 4 ), said belt pulley ( 6 ), said pin shaft ( 7 ), said crank ( 8 ), said transmission shaft ( 9 ), said bracket ( 10 ), and said foundation ( 11 ) of each of said pumping units is the same; one end of said transmission shaft ( 9 ) is connected to a power supply; an other end of said transmission shaft ( 9 ) is connected to a crank ( 8 ) of a first pumping unit; an other crank ( 8 ) of said first pumping unit is connected to an end of a second transmission shaft ( 9 A); an other end of said second transmission shaft ( 9 A) is connected to a crank ( 8 ) of a second pumping unit; an end of a third transmission shaft ( 9 B) is connected to the crank ( 8 ) of said second pumping unit; and cranks ( 8 ) of said pumping units are mounted in a staggered configuration.