Vibration-reducing structure for compressing diaphragm pump

Abstract

A vibration-reducing structure for compressing diaphragm pump features a pump head body and a diaphragm membrane. The pump head body includes three operating holes and a first curved vibration-reducing positioning structure circumferentially disposed around the upper side of each operating hole. The diaphragm membrane includes three equivalent piston acting zones and second curved vibration-reducing position structures situated at positions corresponding to the positions of the first curved vibration-reducing positioning structures. The first positioning structures in the pump head body, which may be grooves, slots, perforations, or protrusions, mate with the corresponding second positioning structures in the diaphragm membrane to reduce the moment arm generated during pumping by movement of the diaphragm membrane, which may be protrusions, grooves, slots, or perforations, thereby generating less torque to decrease the strength of vibrations and vibration noise.

What is claimed is: 
     
         1 . A compressing diaphragm pump with a vibration-reducing structure, wherein said compressing diaphragm pump includes a motor, a pump head body fixed to a motor housing, a roundel mount situated on a lower side of the pump head body and a plurality of eccentric roundels that extend through operating holes in the pump head body, a diaphragm membrane fixed to the eccentric roundels through the operating holes and situated on an upper side of the pump head body, and a plurality of pumping pistons arranged to be moved in a pumping action upon movement of the diaphragm membrane, wherein:
 the pump head body includes at least one first curved vibration-reducing positioning structure at each operating hole on the upper side of the pump head body,   the diaphragm membrane includes at least one second curved positioning structure at a respective position on the diaphragm membrane that corresponds to a position of said at least one first vibration-reducing positioning structure on the pump head body, and   the at least one first positioning structure mates with the corresponding at least one second positioning structure to reduce a moment arm generated during pumping by movement of the diaphragm membrane, thereby generating less torque during said movement to decrease a strength of vibrations and vibration noise.   
     
     
         2 . A compressing diaphragm pump with a vibration-reducing structure as claimed in  claim 1 , wherein said motor includes an output shaft, and said compressing diaphragm pump further includes a wobble plate with an integral protruding cam-lobed shaft and a piston valvular assembly, and wherein:
 said output shaft of said motor extends through a shaft coupling hole in said wobble plate to cause said wobble plate to rotate;   said integral protruding cam-lobed shaft of said wobble plate extends through a central bearing of said eccentric roundel mount;   said eccentric roundel mount has a plurality of said eccentric roundels evenly disposed around a circumference of the eccentric roundel mount, whereby rotation of said wobble plate causes sequential up-and-down movement of each of said eccentric roundels, each eccentric roundel having a top face and a fastening bore formed in the top face;   said pump head body is secured to an upper chassis of the said motor to encompass the wobble plate and eccentric roundel mount therein, said pump head body including a plurality of said operating holes disposed at locations corresponding to locations of said plurality of eccentric roundels, each operating hole having an inner diameter slightly bigger than an outer diameter of a corresponding one of said eccentric roundels for respectively receiving the corresponding one of the eccentric roundels;   said diaphragm membrane is made of a semi-rigid elastic material and placed on the pump head body, said diaphragm membrane including at least one raised rim as well as a plurality of evenly spaced radial raised partition ribs connected with the at least one raised brim to form three equivalent piston acting zones, wherein each piston acting zone has an acting zone hole formed therein at a position corresponding to a position of a fastening bore in a respective one of the eccentric roundels;   each pumping piston has a tiered hole and a fastening member extends through the tiered hole of each pumping piston, through the acting zone hole of each corresponding piston acting zone in the diaphragm membrane, and into the respective fastening hole in a respective one of the eccentric roundels to secure the diaphragm membrane and each of the pumping pistons to the corresponding eccentric roundels in the eccentric roundel mount;   said piston valvular assembly, which covers the diaphragm membrane and is peripherally secured to the diaphragm membrane by sealing engagement, includes a central outlet mount having a central positioning bore and a plurality of equivalent sectors, each of which contains multiple evenly circumferentially-located outlet ports, a T-shaped plastic anti-backflow valve with a central positioning shank, and a plurality of circumferential inlet mounts, each of each of the inlet mounts including multiple evenly circumferentially-located inlet ports and an inverted central piston disk mounted to the respective inlet mount so that each piston disk serves as a valve for each corresponding group of multiple inlet ports, wherein the central positioning shank of the plastic anti-backflow valve mates with the central positioning bore of the central outlet mount such that said multiple outlet ports in the central round outlet mount communicate with the plurality of inlet mounts, and a hermetic preliminary water-pressurizing chamber is formed in each inlet mount and corresponding piston acting zone in the diaphragm membrane upon the diaphragm membrane being peripherally secured to the piston valvular assembly such that one end of each of the preliminary water-pressuring chamber is communicable with each corresponding one of said inlet ports;   said pump head cover, which covers on the pump head body to encompass the piston valvular assembly, pumping piston and diaphragm membrane therein, includes a water inlet orifice, and a water outlet orifice, said pump head cover being hermetically attached to the assembly of diaphragm membrane and piston valvular assembly, wherein a high-pressured water chamber is configured between a cavity formed by an inside wall of an annular rib ring and the central outlet mount of the piston valvular assembly;   said at least one first positioning structure includes at least one of a basic curved groove, curved slot, curved set of openings, curved protrusion, and curved set of protrusions, and is further circumferentially-disposed around an upper side of each operating hole in the pump head body; and   second at least one second vibration-reducing positioning structure includes one of a basic curved protrusion, curved set of protrusions, curved groove, curved slot, and curved set of openings, and is further circumferentially-disposed around each concentric annular positioning protrusion at the bottom side of the diaphragm membrane at a position corresponding to a position of each first positioning structure in the pump head body so that each second positioning structure at the bottom side of the diaphragm membrane is mated with each corresponding first positioning structure at the upper side of the pump head body upon assembly of the pump head body and the diaphragm membrane, whereby the moment arm generated by movement of the diaphragm membrane in response to up-and-down movement of the pistons extends between the first vibration-reducing structures and a periphery of the second vibration-reducing structures to thereby reduce vibrations resulting from said movement of the diaphragm.   
     
     
         3 . The compressing diaphragm pump with a vibration-reducing structure as claimed in  claim 2 , wherein each said first vibration-reducing positioning structure is a curved groove in the pump head body and each said second vibration-reducing positioning structure is a curved protrusion extending from the diaphragm membrane. 
     
     
         4 . The compressing diaphragm pump with a vibration-reducing structure as claimed in  claim 2 , wherein each said first vibration-reducing positioning structure is a curved slot in the pump head body and each said second vibration-reducing positioning structure is a curved protrusion extending from the diaphragm membrane. 
     
     
         5 . The compressing diaphragm pump with a vibration-reducing structure as claimed in  claim 2 , wherein each said first vibration-reducing positioning structure is a curved set of openings in the pump head body and each said second vibration-reducing positioning structure is a curved set of protrusions extending from the diaphragm membrane. 
     
     
         6 . The compressing diaphragm pump with a vibration-reducing structure as claimed in  claim 2 , wherein each said first vibration-reducing positioning structure is a curved protrusion extending from the pump head body and each said second vibration-reducing positioning structure is a curved groove in the diaphragm membrane. 
     
     
         7 . The compressing diaphragm pump with a vibration-reducing structure as claimed in  claim 2 , wherein each said first vibration-reducing positioning structure is a curved protrusion extending from the pump head body and each said second vibration-reducing positioning structure is a curved slot in the diaphragm membrane. 
     
     
         8 . The compressing diaphragm pump with a vibration-reducing structure as claimed in  claim 2 , wherein each said first vibration-reducing positioning structure is a curved set of protrusions extending from the pump head body and each said second vibration-reducing positioning structure is a curved set of openings in the diaphragm membrane. 
     
     
         9 . The compressing diaphragm pump with a vibration-reducing structure as claimed in  claim 8 , wherein said protrusions are round protrusions. 
     
     
         10 . The compressing diaphragm pump with a vibration-reducing structure as claimed in  claim 8 , wherein said protrusions are square protrusions. 
     
     
         11 . The compressing diaphragm pump with a vibration-reducing structure as claimed in  claim 2 , wherein each said first vibration-reducing positioning structure is a pair of curved grooves or slots in the pump head body and each said second vibration-reducing positioning structure is a pair of curved protrusions extending from the diaphragm membrane. 
     
     
         12 . The compressing diaphragm pump with a vibration-reducing structure as claimed in  claim 2 , wherein each said first vibration-reducing positioning structure is a pair of curved protrusions extending from the pump head body and each said second vibration-reducing positioning structure is a pair of curved grooves or slots in the diaphragm membrane. 
     
     
         13 . The compressing diaphragm pump with a vibration-reducing structure as claimed in  claim 12 , wherein said protrusions are round protrusions. 
     
     
         14 . The compressing diaphragm pump with a vibration-reducing structure as claimed in  claim 12 , wherein said protrusions are round protrusions. 
     
     
         15 . The compressing diaphragm pump with a vibration-reducing structure as claimed in  claim 12 , wherein each said first vibration-reducing positioning structure is an indented ring in the pump head body and each said second vibration-reducing positioning structure is a ring structure projecting from the diaphragm membrane. 
     
     
         16 . The compressing diaphragm pump with a vibration-reducing structure as claimed in  claim 2 , wherein each said first vibration-reducing positioning structure is a pair of indented rings in the pump head body and each said second vibration-reducing positioning structure is a pair of ring structures projecting from the diaphragm membrane. 
     
     
         17 . The compressing diaphragm pump with a vibration-reducing structure as claimed in  claim 2 , wherein each said eccentric roundel further includes an annular groove extending around said fastening bore, and said pump head body further includes a plurality of lower annular flanges extending into respective said annular grooves when said pump head body is fastened to said eccentric roundel. 
     
     
         18 . The compressing diaphragm pump with a vibration-reducing structure as claimed in  claim 2 , wherein said at least one raised rim of said diaphragm membrane is an inner raised rim, said diaphragm membrane includes a parallel outer raised rim, said piston valvular assembly includes a downwardly extending raised rim, and said to downwardly extending raised rim of said piston valvular assembly extends between said inner and outer raised rims of said diaphragm membrane to provide a peripheral seal when said diaphragm membrane is peripherally secured to said piston valvular assembly. 
     
     
         19 . The compressing diaphragm pump with a vibration-reducing structure as claimed in  claim 2 , wherein a respective number of said eccentric roundels, said operating holes in said pump head body, said piston acting zones, and said pumping pistons is three. 
     
     
         20 . The compressing diaphragm pump with a vibration-reducing structure as claimed in  claim 2 , wherein a number of said circumferential inlet mounts is three. 
     
     
         21 . The compressing diaphragm pump with a vibration-reducing structure as claimed in  claim 2 , wherein said fastening bores in said eccentric roundels are threaded bores and said fastening members are screws. 
     
     
         22 . The compressing diaphragm pump with a vibration-reducing structure as claimed in  claim 2 , wherein said cavity is formed by a bottom of an annular rib ring of the pump head cover being pressed onto a rim of the central outlet mount of the piston valvular assembly. 
     
     
         23 . The compressing diaphragm pump with a vibration-reducing structure as claimed in  claim 1 , wherein each said first vibration-reducing positioning structure is a curved groove in the pump head body and each said second vibration-reducing positioning structure is a curved protrusion extending from the diaphragm membrane. 
     
     
         24 . The compressing diaphragm pump with a vibration-reducing structure as claimed in  claim 1 , wherein each said first vibration-reducing positioning structure is a curved slot in the pump head body and each said second vibration-reducing positioning structure is a curved protrusion extending from the diaphragm membrane. 
     
     
         25 . The compressing diaphragm pump with a vibration-reducing structure as claimed in  claim 1 , wherein each said first vibration-reducing positioning structure is a curved set of openings in the pump head body and each said second vibration-reducing positioning structure is a curved set of protrusions extending from the diaphragm membrane. 
     
     
         26 . The compressing diaphragm pump with a vibration-reducing structure as claimed in  claim 1 , wherein each said first vibration-reducing positioning structure is a curved protrusion extending from the pump head body and each said second vibration-reducing positioning structure is a curved groove in the diaphragm membrane. 
     
     
         27 . The compressing diaphragm pump with a vibration-reducing structure as claimed in  claim 1 , wherein each said first vibration-reducing positioning structure is a curved protrusion extending from the pump head body and each said second vibration-reducing positioning structure is a curved slot in the diaphragm membrane. 
     
     
         28 . The compressing diaphragm pump with a vibration-reducing structure as claimed in  claim 1 , wherein each said first vibration-reducing positioning structure is a curved set of protrusions extending from the pump head body and each said second vibration-reducing positioning structure is a curved set of openings in the diaphragm membrane. 
     
     
         29 . The compressing diaphragm pump with a vibration-reducing structure as claimed in  claim 1 , wherein each said first vibration-reducing positioning structure is a pair of curved grooves or slots in the pump head body and each said second vibration-reducing positioning structure is a pair of curved protrusions extending from the diaphragm membrane. 
     
     
         30 . The compressing diaphragm pump with a vibration-reducing structure as claimed in  claim 1 , wherein each said first vibration-reducing positioning structure is a pair of curved protrusions extending from the pump head body and each said second vibration-reducing positioning structure is a pair of curved grooves or slots in the diaphragm membrane. 
     
     
         31 . The compressing diaphragm pump with a vibration-reducing structure as claimed in  claim 1 , wherein each said first vibration-reducing positioning structure is an indented ring in the pump head body and each said second vibration-reducing positioning structure is a ring structure projecting from the diaphragm membrane. 
     
     
         32 . The compressing diaphragm pump with a vibration-reducing structure as claimed in  claim 1 , wherein each said first vibration-reducing positioning structure is a pair of indented rings in the pump head body and each said second vibration-reducing positioning structure is a pair of ring structures projecting from the diaphragm membrane. 
     
     
         33 . The compressing diaphragm pump with a vibration-reducing structure as claimed in  claim 1 , wherein said motor is a brushed motor. 
     
     
         34 . The compressing diaphragm pump with a vibration-reducing structure as claimed in  claim 1 , wherein said motor is a brushless motor.