Elastically driven piston pump

An elastically driven piston pump, comprising a cylinder block, a spring, a first piston, a first rotor, a first rod member, a second piston, a second rotor, a second rod member, a sliding bearing, and an eccentric transmission shaft, wherein:

• the eccentric transmission shaft is arranged on the cylinder block, the first rotor and the second rotor are both arranged on the eccentric transmission shaft, the first rod member is arranged on the first piston, the second rod member is arranged on the second piston, the spring is arranged on the first rod member or the first piston and also on the second rod member or the second piston through a transmission belt;
• the first rod member and the second rod member respectively slide in two sliding bearings;
• when the first rotor rolls or slides on the first piston to drive the first piston to move upward, the spring drives the second rod member and the second piston to move downward;
• and
• when the second rotor rolls or slides on the second piston to drive the second piston to move upward, the spring drives the first rod member and the first piston to move downward.

An elastically driven piston pump, comprising a cylinder block, a first piston-, a first rotor, a spring, and two eccentric transmission shafts which are parallelly disposed on the cylinder block, wherein:

• two first rotors are respectively disposed on the two eccentric transmission shafts, and the first rotors roll or slide on the first piston;
• a transmission mechanism such as gears or pulleys is provided on the two eccentric transmission shafts to make the two first rotors rotate in the same direction or in reverse synchronization;
• the two first rotors jointly drive the first piston to move upward;
• the two ends of the spring are respectively disposed on the first piston and the cylinder block, or the spring is disposed on a transmission belt and the transmission belt is disposed on the first piston through the eccentric transmission shaft and
• when the upward movement of the first piston is completed, the spring drives the first piston to move downward, and the first piston always maintains a compressed contact state with the first rotor under the action of the spring.

An elastically driven piston pump, comprising a cylinder block, a first piston, a second piston, a first rotor, a second rotor, a spring, and two eccentric transmission shafts which are parallelly disposed on the cylinder block, wherein:

• there are two first rotors respectively disposed on the two eccentric transmission shafts, and two second rotors respectively disposed on the two eccentric transmission shafts;
• the first rotors and the second rotors respectively roll or slide on the first piston and the second piston;
• a transmission mechanism such as gears or pulleys is provided on the two eccentric transmission shafts to make the two first rotors rotate in the same direction or in reverse synchronization, and the two second rotors rotate in the same direction or in reverse synchronization;
• the two ends of the spring are respectively disposed on the first piston and the second piston, or the spring is disposed on a transmission belt, and the transmission belt is disposed on the first piston and the second piston through wheels located on the cylinder block;
• and
• the first piston always maintains a compressed contact state with the first rotor under the action of the spring, and the second piston always maintains a compressed contact state with the second rotor under the action of the spring.