1. A double diaphragm pump is characterized by comprising:

the pump body seat (10), the upper end surface of the pump body seat (10) is sunken to form a left water inlet cavity (11) and a right water inlet cavity (11) which are communicated with each other, the water inlet cavities (11) are respectively provided with an independent water outlet cavity (12) and at least one water inlet flow channel (13) which is respectively formed on the periphery of the water outlet cavity (12) and vertically penetrates through the bottom surface of the water inlet cavity (11), and the water outlet cavity (12) is also internally provided with a vertically penetrating water outlet flow channel (14);

the end cover (20) covers the pump body seat (10), the water inlet cavity (11) and the water outlet cavity (12) can form a closed hollow accommodating space respectively, and the upper surface of the end cover (20) is provided with a water inlet (21) communicated with the water inlet cavity (11) and a water outlet (22) communicated with the water outlet cavity (12);

the diaphragm seat (30) is attached to the bottom surface of the pump body seat (10), diaphragm chambers (31) are respectively arranged in the diaphragm seat (30) corresponding to the left water inlet cavity (11) and the right water inlet cavity (11), and extrusion parts (32) capable of extruding liquid entering the water inlet cavities (11) from the water outlet flow channel (14) after being pumped in through the water inlet flow channel (13) are respectively arranged in the diaphragm chambers (31);

the driving seat (40) is hollow, the top of the driving seat is open, the driving seat (40) is buckled on the bottom surface of the diaphragm seat (30), and a transmission device (50) capable of respectively and independently driving the two extrusion pieces (32) to work is arranged in the driving seat (40);

first soft valve plates (15) which are respectively arranged at the corresponding water inlet flow passages (13) and can dynamically block the water inlet flow passages (13), the first soft valve plates (15) are respectively arranged on the bottom surface of the pump body seat (10), the second soft valve plates (16) capable of blocking the water outlet flow channel (14) are respectively and dynamically arranged in the water outlet cavity (12), wherein when the extrusion piece (32) pumps the liquid entering the water inlet cavity (11) through the water inlet flow passage (13), the first soft valve plate (15) opens the corresponding water inlet flow passage (13), meanwhile, the second soft valve plate (16) closes the corresponding water outlet flow channel (14), when the extrusion piece (32) extrudes the pumped liquid through the water outlet flow passage (14) to be discharged, the first soft valve sheet (15) closes the water inlet flow passage (13), meanwhile, the second soft valve plate (16) opens the water outlet flow channel (14);

the driving piece (60) can drive the transmission device (50) to rotate forwards during forward rotation so as to drive one of the extrusion pieces (32) to work and can drive the transmission device (50) to rotate backwards during reverse rotation so as to drive the other extrusion piece (32) to work, the driving piece (60) is arranged on the driving seat (40), and the output end of the driving piece is connected with the transmission device (50).

2. The twin diaphragm pump of claim 1, wherein the extrusion member (32) comprises at least two leather cups (321) movably embedded in the diaphragm chamber (31), leather cup swing rods (323) are fixed at the bottoms of the leather cups (321), a swinging member (33) capable of sequentially driving the leather cups (321) to generate extrusion and suction actions so as to reduce or increase the volume of the space in the diaphragm chamber (31) is movably sleeved at the bottom of the leather cup swing rod (323), and the transmission device (50) is arranged between the two swinging members (33) and is separately connected with the two swinging members (33).

3. The twin diaphragm pump according to claim 2, wherein the swinging member (33) comprises a swinging bracket (331), a plurality of first through holes (332) are respectively formed at the top of the swinging bracket (331) for allowing the bottom end of the cup swing link (323) to be inserted correspondingly, a connecting rod (333) is respectively formed at the center of the bottom of the swinging bracket (331), an eccentric bushing (334) capable of being driven by the transmission device (50) to rotate is movably sleeved below the connecting rod (333), an eccentric shaft hole (3341) capable of allowing the connecting rod (333) to be inserted is formed in the eccentric bushing (334), a rotating shaft (3342) is rotatably arranged in the driving seat (40) corresponding to the lower part of each swinging bracket (331), and the top end of the rotating shaft (3342) is fixed at the bottom of the corresponding eccentric bushing (334) above, and is positioned at one side of the eccentric shaft hole (3341).

4. A twin diaphragm pump according to claim 3, wherein the transmission device (50) comprises a pair of forward and reverse rotating wheels (51) rotatably disposed at the top and bottom of the inner cavity of the driving seat (40), a driving wheel (52) is disposed between the forward and reverse rotating wheels (51) and can be driven by a driving member (60) to rotate, a clutch member (53) is disposed on the driving wheel (52) and can be individually connected to the corresponding forward and reverse rotating wheels (51) to drive them to rotate, and the forward and reverse rotating wheels (51) are respectively connected to the corresponding left and right eccentric sleeves (334).

5. A twin diaphragm pump in accordance with claim 3, wherein a first gear (511) coaxial with the axis is fixed to the forward and reverse rotation wheel (51) located at the top of the inner cavity of the driving seat (40), a second gear (522) coaxial with the axis is fixed to the forward and reverse rotation wheel (51) located at the bottom of the inner cavity of the driving seat (40), a first driven gear (34) coaxial with the axis (3342) and capable of meshing with the first gear (511) is provided on the axis (3342) of one of the eccentric bushings (334), and a second driven gear (35) coaxial with the axis (3342) and capable of meshing with the second gear (522) is provided on the axis (3342) of the other eccentric bushing (334).

6. The twin diaphragm pump according to claim 5, wherein the clutch member (53) comprises a plurality of first one-way teeth (5111) having an inclined surface at one side and an upright surface at the opposite side, which are fixedly formed on the bottom surface of the first gear (511), and a plurality of second one-way teeth (5222) having an inclined surface at one side and an upright surface at the opposite side, which are fixedly formed on the top surface of the second gear (522), which are circumferentially arranged at intervals, wherein the inclined surfaces of the first one-way teeth (5111) and the second one-way teeth (5222) face in opposite directions, at least one second through hole (521) vertically penetrates the driving wheel (52), a clutch pin (531) movably disposed in the second through hole (521) and capable of moving up and down in a column shape in the second through hole (521), and wherein the top and bottom of the clutch pin (531) have opposite inclined surfaces, respectively, the inclined surface at the top of the clutch pin (531) and the inclined surface of the first one-way tooth (5111) are mutually extruded to force the clutch pin (531) to move downwards from the second through hole (521), so that the vertical surface at the bottom of the clutch pin (531) and the vertical surface of the second one-way tooth (5222) are mutually abutted, the second gear (522) is driven to rotate, and otherwise, the clutch pin (531) moves upwards from the second through hole (521), and the first gear (511) is driven to rotate.

7. The twin diaphragm pump according to claim 5 or 6, wherein the driving member (60) includes a motor (61) mounted at the bottom of the driving seat (40), a third through hole (62) capable of allowing an output shaft of the motor (61) to pass through is formed in the bottom wall surface of the driving seat (40) and the central axis of the forward and reverse rotating wheel (51) and the second gear (522) rotatably disposed at the bottom of the inner cavity of the driving seat (40), and the output shaft of the motor (61) passes through the third through hole (62) and then is fixedly connected with the axis of the driving wheel (52).

8. The twin diaphragm pump according to claim 7, wherein the diameter of the third through hole (62) is larger than the diameter of the output shaft of the motor (61), and the outer wall surface of the output shaft of the motor (61) does not contact the inner wall surface (62) of the third through hole.

9. The twin diaphragm pump according to claim 5, wherein the clutch member (53) comprises a plurality of first one-way teeth (5111A) having a slope on one side and an upright on the opposite side, which are fixedly formed on the bottom surface of the first gear (511), and a plurality of second one-way teeth (5222A) having a slope on one side and an upright on the opposite side, which are fixedly formed on the top surface of the second gear (522), wherein the slopes of the first one-way teeth (5111A) and the second one-way teeth (5222A) face in opposite directions, at least one elastic piece A (531) having the same direction as the slope of the first one-way teeth (5111A) and having an end capable of abutting against the upright on the first one-way teeth (5111A), and at least one elastic piece A (531) having the same direction as the slope of the second one-way teeth (5222A) and being provided on the lower surface of the driving wheel (52), and the end part can be resisted with an elastic sheet B (531B) on the vertical surface of the second one-way tooth (5222A).

10. A twin diaphragm pump according to claim 9, wherein the elastic piece a (531A) and the elastic piece B (531B) are both made of metal material, and the first one-way tooth (5111A) and the second one-way tooth (5222A) are both made of plastic material.

Background

The miniature electric diaphragm pump uses a miniature direct current motor as a power driving device to drive an internal mechanical eccentric device to do eccentric motion, and the eccentric motion drives an internal diaphragm to do reciprocating motion. Therefore, air in the pump cavity with the fixed volume is compressed (the air suction opening is closed during compression, the air exhaust opening is opened to form micro-positive pressure), stretched (the air exhaust opening is closed during compression, and the air suction opening is opened to form negative pressure), pressure difference is generated between the air suction opening and the external atmospheric pressure, and gas (or liquid) is pressed (sucked) into the pump cavity and then discharged from the air exhaust opening under the action of the pressure difference.

In addition, the micro vacuum pump, the micro air pump and the negative pressure pump are all diaphragm type, and because the air exhaust port or the air exhaust port can form pressure difference with the external atmosphere, simultaneously, the micro vacuum pump does not need lubricating oil and vacuum pump oil, does not pollute working media, and has the advantages of small volume, low noise, maintenance free, continuous 24-hour operation and the like, the micro vacuum pump is used as a power device, is widely applied to the occasions of gas sampling, gas circulation, vacuum adsorption, accelerated filtration, water pumping and the like, and is widely applied to the fields of medical treatment, health, scientific research, environmental protection, daily life and the like, such as a water dispenser, a coffee machine, a water purifier, an air purifier, a tea making machine, water circulation equipment, particularly the field of drinking water and the like, and is particularly favored.

However, when the pump is applied to a product, due to the requirement of designing and applying a structure, the position of a required water outlet changes along with the product, different requirements can be provided, the existing solutions are all provided with two pump bodies which are arranged in parallel, a motor corresponding to the requirement is installed under each pump body to drive the pump bodies, the two motors correspond to the two pump bodies, so that the cost is increased, the capacity is limited in production, the assembly process is increased, a corresponding complex control circuit needs to be designed in later product application, the volume of the product applied at the same time is increased, and the maintenance difficulty is very troublesome after the product is sold.

As such, there is a need for further improvements in existing dual pump body diaphragm pumps.

Disclosure of Invention

The invention aims to provide a double-row diaphragm pump which can respectively and independently drive any one of two pump bodies in the double-row to work by using a single motor.

In order to achieve the purpose, the invention adopts the following scheme: a twin diaphragm pump comprising:

the pump body seat is provided with a left water inlet cavity and a right water inlet cavity which are mutually communicated and are sunken on the upper end surface of the pump body seat, the water inlet cavities are respectively provided with an independent water outlet cavity and at least one water inlet flow channel which is respectively formed on the periphery of the water outlet cavity and vertically penetrates through the bottom surface of the water inlet cavity, and the water outlet cavities are respectively provided with vertically penetrating water outlet flow channels;

the end cover covers the pump body seat, the water inlet cavity and the water outlet cavity can form a closed hollow accommodating space respectively, the upper surface of the end cover is provided with a water inlet communicated with the water inlet cavity and water outlets communicated with the water outlet cavity respectively, and a shared water inlet and two independent water outlets are adopted, so that the arrangement of the water inlets is reduced, the cost is saved, and the structure is more reasonable;

the diaphragm seat is attached to the bottom surface of the pump body seat, diaphragm chambers are respectively arranged in the diaphragm seat corresponding to the left water inlet cavity and the right water inlet cavity, and extrusion parts which can extrude liquid entering the water inlet cavities from the water outlet channels after being pumped in through the water inlet channels are respectively arranged in the diaphragm chambers;

the driving seat is hollow and has an open top, is buckled on the bottom surface of the diaphragm seat, and is internally provided with a transmission device which can respectively and independently drive the two extrusion pieces to work;

the first soft valve plates are respectively arranged at the corresponding water inlet flow passages and can dynamically block the water inlet flow passages, the first soft valve plates are respectively arranged at the bottom surfaces of the pump body seats, and the second soft valve plates capable of blocking the water outlet flow passages are respectively and dynamically arranged in the water outlet cavities, wherein when the liquid entering the water inlet cavities is pumped out through the water inlet flow passages by the extrusion piece, the corresponding water inlet flow passages are opened by the first soft valve plates, meanwhile, the corresponding water outlet flow passages are closed by the second soft valve plates, when the pumped liquid is extruded out through the water outlet flow passages by the extrusion piece, the water inlet flow passages are closed by the first soft valve plates, and the water outlet flow passages are opened by the second soft valve plates;

the driving piece can drive the transmission device to rotate positively when rotating positively so as to drive one of the extrusion pieces to work, can drive the transmission device to rotate reversely when rotating reversely so as to drive the other extrusion piece to work, is arranged on the driving seat, and has an output end connected with the transmission device.

As a further scheme of the invention, the extrusion part comprises at least two leather cups which are respectively and movably embedded in the diaphragm chamber, leather cup swing rods are fixed at the bottoms of the leather cups, swing parts which can sequentially drive the leather cups to generate extrusion and suction actions so as to reduce or increase the volume of the space in the diaphragm chamber are movably sleeved at the bottoms of the leather cup swing rods, and the transmission device is arranged between the two swing parts and is respectively and independently connected with the two swing parts.

As a further scheme of the invention, the swinging part comprises a swinging support, a plurality of first through holes capable of allowing the bottom end of the leather cup swinging rod to be correspondingly inserted are respectively arranged at the top of the swinging support, a connecting rod is respectively arranged at the center of the bottom of the swinging support, an eccentric shaft sleeve capable of being driven by the transmission device to rotate is movably sleeved below the connecting rod, an eccentric shaft hole capable of allowing the connecting rod to be inserted is penetrated through the eccentric shaft sleeve, a rotating shaft is rotatably arranged in the driving seat and respectively corresponds to the lower part of each swinging support, and the top end of the rotating shaft is fixed at the bottom of the corresponding eccentric shaft sleeve above and is positioned at one side of the eccentric shaft hole.

As a further scheme of the invention, the transmission device comprises forward and reverse rotating wheels which are respectively and rotatably arranged at the top and the bottom of the inner cavity of the driving seat, a driving wheel which can be driven to rotate by a driving piece is arranged between the forward and reverse rotating wheels, a clutch piece which can be respectively and independently connected with the corresponding forward and reverse rotating wheels up and down during forward rotation or reverse rotation and further drives the forward and reverse rotating wheels to rotate is arranged on the driving wheel, and the two forward and reverse rotating wheels are respectively connected with the corresponding left and right eccentric shaft sleeves.

As a further scheme of the invention, a first gear coaxial with the rotating shaft is fixedly arranged on the positive and negative rotating wheel positioned at the top of the inner cavity of the driving seat, a second gear coaxial with the rotating shaft is fixedly arranged on the positive and negative rotating wheel positioned at the bottom of the inner cavity of the driving seat, a first driven gear coaxial with the rotating shaft and capable of being meshed with the first gear is arranged on the rotating shaft of one eccentric shaft sleeve, and a second driven gear coaxial with the rotating shaft and capable of being meshed with the second gear is arranged on the rotating shaft of the other eccentric shaft sleeve.

As a further scheme of the invention, the clutch member comprises a plurality of first one-way teeth which are fixedly formed on the bottom surface of the first gear and are sequentially arranged at intervals along the circumference, wherein one side of each first one-way tooth is an inclined surface, the opposite side of each first one-way tooth is an upright surface, a plurality of second one-way teeth which are fixedly formed on the top surface of the second gear and are sequentially arranged at intervals along the circumference, one side of each second one-way tooth is an inclined surface, the opposite side of each second one-way tooth is an upright surface, the inclined surfaces of the first one-way teeth and the second one-way teeth face opposite directions, at least one second through hole which vertically penetrates through the driving wheel is movably provided with a clutch pin which can vertically move in a column shape in the second through hole, the top and the bottom of the clutch pin are respectively provided with opposite inclined surfaces, wherein the inclined surface positioned at the top of the clutch pin and the inclined surface of the first one-way tooth are mutually pressed to force the clutch pin to downwards move from the second through hole, therefore, the vertical surface of the bottom of the clutch pin and the vertical surface of the second one-way tooth are abutted against each other to drive the second gear to rotate, otherwise, the clutch pin moves upwards from the second through hole to drive the first gear to rotate, so that the problem that a single motor drives any one of two row pump bodies independently is solved effectively, the structure is simple, the assembly is convenient, and the production cost is reduced.

As a further scheme of the invention, the driving member comprises a motor mounted at the bottom of the driving seat, third through holes capable of allowing an output shaft of the motor to penetrate through are formed in the wall surface at the bottom of the driving seat and the central shafts of the forward and reverse rotating wheel and the second gear which are rotatably arranged at the bottom of the inner cavity of the driving seat, and the output shaft of the motor penetrates through the third through holes and then is fixedly connected with the axis of the driving wheel.

As a further aspect of the present invention, the diameter of the third through hole is larger than the diameter of the output shaft of the motor, and the outer wall surface of the output shaft of the motor does not contact the inner wall surface of the third through hole.

As a preferable scheme of the clutch member of the present invention, the clutch member includes a plurality of first unidirectional teeth fixedly formed on the bottom surface of the first gear and arranged at intervals in sequence along the circumference, the first unidirectional teeth having an inclined surface on one side and an upright surface on the opposite side, and a plurality of second unidirectional teeth fixedly formed on the top surface of the second gear and arranged at intervals in sequence along the circumference, the inclined surfaces of the first unidirectional teeth and the second unidirectional teeth face in opposite directions, the upper surface of the driving wheel is provided with at least one elastic piece a having the same direction as the inclined surface of the first unidirectional teeth and an end capable of abutting against the upright surface of the first unidirectional teeth, and the lower surface of the driving wheel is provided with at least one elastic piece B having the same direction as the inclined surface of the second unidirectional teeth and an end capable of abutting against the upright surface of the second unidirectional teeth.

As a further aspect of the present invention, the elastic piece and the elastic piece are both made of a metal material, and the first unidirectional tooth and the second unidirectional tooth are both made of a plastic material.

In summary, compared with the prior art, the invention has the beneficial effects that: the invention respectively drives the upper and lower positive and negative rotation wheels to rotate through the clutch piece which is skillfully designed, so as to drive the eccentric shaft sleeve connected with the upper and lower positive and negative rotation wheels to rotate, and can respectively and independently control one of the pump bodies in the double rows to work.

Drawings

Fig. 1 is a perspective view of the present invention.

Fig. 2 is one of the cross-sectional views of the present invention.

Fig. 3 is a second cross-sectional view of the present invention.

Fig. 4 is one of the exploded views of the present invention.

Fig. 5 is a second exploded view of the present invention.

Fig. 6 is a third exploded view of the present invention.

Fig. 7 is an enlarged view at a in fig. 5.

FIG. 8 is a fourth exploded view of the present invention.

FIG. 9 is a fifth exploded view of the present invention.

FIG. 10 is a schematic view of another embodiment of a clutch member according to the present invention.

Detailed Description

The following detailed description provides many different embodiments or examples for implementing the invention. Of course, these are merely embodiments or examples and are not intended to be limiting. In addition, repeated reference numbers, such as repeated numbers and/or letters, may be used in various embodiments. These iterations are for simplicity and clarity of describing the present invention and are not intended to represent a particular relationship between the various embodiments and/or configurations discussed.

Furthermore, spatially relative terms, such as "below" … "," below "," inside-out "," above "," upper "and the like, may be used herein to facilitate describing one element or feature's relationship to another element or feature during use or operation of the device, and may include different orientations of the device during use or operation of the device as illustrated in the figures. The devices may be rotated 90 degrees or other orientations from different orientations and the spatially relative descriptors used therein should be interpreted as such and are not to be construed as limiting the invention, and the terms "first" and "second" are used for descriptive purposes only and are not intended to indicate or imply relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

The invention will be further described with reference to the following description and embodiments in conjunction with the accompanying drawings: a double diaphragm pump as shown in fig. 1 to 10 comprises, from top to bottom: the pump body seat 10 is formed by injection molding, a left water inlet cavity 11 and a right water inlet cavity 11 which are mutually communicated are formed on the upper end surface of the pump body seat 10 in a concave manner, an independent water outlet cavity 12 is respectively arranged in the two water inlet cavities 11, at least one water inlet runner 13 is respectively surrounded on the periphery of the corresponding water outlet cavity 12 and vertically penetrates through the bottom surface of the water inlet cavity 11, a vertically penetrating water outlet runner 14 is also respectively arranged in the two water outlet cavities 12, and the water outlet cavity 12 is formed on the bottom surface of the water inlet cavity 11 by a circular upward-protruding ring body in the embodiment; the end cover 20 is covered on the pump body seat 10 and is formed by injection molding, the end cover 20 can enable the water inlet cavity 11 and the water outlet cavity 12 to respectively form a closed hollow accommodating space, and the upper surface of the end cover 20 is provided with a water inlet 21 which can be communicated with the water inlet cavity 11 and a water outlet 22 which can be communicated with the two water outlet cavities 12 respectively; a diaphragm seat 30 which is attached to the bottom surface of the pump body seat 10 and is formed by injection molding, a plurality of diaphragm chambers 31 which are in a penetrating shape are respectively arranged in the positions corresponding to the left water inlet cavity 11 and the right water inlet cavity 11 in the diaphragm seat 30, and extrusion pieces 32 which can extrude liquid entering the water inlet cavities 11 from the water outlet channels 14 after being sucked through the water inlet channels 13 are respectively embedded in the diaphragm chambers 31; the hollow driving seat 40 is opened at the top and is also formed by injection molding, the driving seat 40 is buckled on the bottom surface of the membrane seat 30, and a transmission device 50 which can respectively and independently drive the two extrusion parts 32 to work is arranged in the driving seat 40; wherein, the outlet of each water inlet channel 13 is respectively provided with a first soft valve sheet 15 capable of dynamically blocking the water inlet channel 13, the first soft valve sheet 15 is respectively arranged at the bottom of the pump body base 10 corresponding to each water inlet channel 13, the two water outlet cavities 12 are respectively dynamically provided with a second soft valve sheet 16 capable of blocking the water outlet channel 14, the second soft valve sheet 16 is specifically arranged on the upper surface of the bottom of the inner cavity of the water outlet cavity 12, the first soft valve sheet 15 and the second soft valve sheet 16 both need to completely cover the corresponding channel, it is specially noted that, when the liquid entering the water inlet cavity 11 is pumped out through the water inlet channel 13 by the extrusion member 32, the first soft valve sheet 15 opens the corresponding water inlet channel 13, and the second soft valve sheet 16 closes the corresponding water outlet channel 14, when the pumped liquid is extruded out through the water outlet channel 14 by the extrusion member 32, the first soft valve sheet 15 closes the water inlet flow channel 13, and the second soft valve sheet 16 opens the water outlet flow channel 14, that is, the first soft valve sheet 15 and the second soft valve sheet 16 are both one-way valve sheets, although such a structure is a conventional means in the prior art, and will not be described herein again; the driving part 60 is arranged on the driving seat 40, and the output end of the driving part 60 is connected with the transmission device 50, specifically, the driving part 60 is a motor 61 arranged at the bottom of the driving seat 40.

Referring to fig. 2, 3, 5 and 6, the extruding member 32 includes leather cups 321 movably embedded in the diaphragm chambers 31, the leather cups 321 in the diaphragm chambers 31 under the single-side water inlet chamber 11 are connected to each other, leather cup swing rods 323 are fixed at the bottoms of the leather cups 321, swing members 33 capable of driving the leather cups 321 to generate extruding and sucking actions sequentially are movably sleeved at the bottoms of the leather cup swing rods 323, so that the volume of the space in the diaphragm chambers 31 is reduced or increased, convex balls 3231 capable of being pressed by the swing members 33 are fixed above the swing members 33 on the leather cup swing rods 323, and the transmission device 50 is arranged between the two swing members 33 and is separately connected with the two swing members 33.

Wherein, the swinging member 33 comprises an integrally formed swinging bracket 331, each leather cup swinging rod 323 corresponding to the upper part of the top of the swinging bracket 331 is respectively provided with a plurality of first through holes 332 capable of accommodating the bottom ends of the corresponding leather cup swinging rods 323 to be inserted correspondingly, the center of the bottom of the swinging bracket 331 is respectively provided with a connecting rod 333, an eccentric shaft sleeve 334 capable of being driven to rotate by the transmission device 50 is movably sleeved below the connecting rod 333, an eccentric shaft hole 3341 capable of accommodating the connecting rod 333 to be inserted is penetrated through the eccentric shaft sleeve 334, a rotating shaft seat 401 is fixedly arranged in the driving seat 40 corresponding to the lower part of each swinging bracket 331 respectively, a rotating shaft 3342 is rotatably and vertically arranged on the rotating shaft seat 401, the top end of the rotating shaft 3342 is fixed at the bottom of the corresponding eccentric shaft sleeve 334 corresponding to the upper part and is positioned at one side of the eccentric shaft hole 3341, so that when the eccentric shaft sleeve 334 rotates by taking the rotating shaft 3342 as the axis, the connecting rod 333 generates eccentric motion, and since the upper cup 321 is limited in the diaphragm chamber 31 and does not generate displacement, the swing bracket 331 below the connecting rod will generate a swing effect, and at this time, each cup 321 is driven by the swing bracket 331 to sequentially generate an action of being extruded and deformed, so as to change the volume of the space in the cup 321, thereby generating a pumping action, and completing the effects of pumping in the liquid entering the water inlet cavity 11 through the water inlet flow channel 13 and extruding the pumped liquid through the water outlet flow channel 14.

It should be noted that, as shown in fig. 2 to fig. 9, it can be clearly seen that the transmission device 50 includes forward and reverse rotating wheels 51 rotatably disposed at the top and the bottom of the inner cavity of the driving seat 40, wherein the forward and reverse rotating wheels 51 at the top of the inner cavity of the driving seat 40 are snap-fitted by a snap-fit column 402 with a circular protrusion at an end portion formed by extending downward from the top of the inner cavity of the driving seat 40, the forward and reverse rotating wheels 51 at the top of the inner cavity of the driving seat 40 rotate around the snap-fit column 402 (specifically, it can be understood with reference to fig. 3), and the forward and reverse rotating wheels 51 at the bottom of the inner cavity of the driving seat 40 are snap-fitted by a snap-fit platform 403 with a cavity inside formed by protruding upward from the bottom of the inner cavity of the driving seat 40 (specifically, please refer to fig. 3), a second gear 522 having the same axis is fixed to the forward and reverse rotation wheels 51 positioned at the bottom of the inner cavity of the driving holder 40, a first driven gear 34 having the same axis as the rotating shaft 3342 and capable of meshing with the first gear 511 is fixed to the rotating shaft 3342 of one (left side in the drawing) of the eccentric bushings 334, a second driven gear 35 having the same axis as the rotating shaft 3342 and capable of meshing with the second gear 522 is fixed to the rotating shaft 3342 of the other (right side in the drawing), the two forward and reverse rotation wheels 51 are respectively connected to the first and second driven gears 34 and 35 respectively corresponding to the left and right eccentric bushings 334 through the first and second gears 511 and 522 respectively corresponding thereto, a driving wheel 52 capable of being driven and rotated by a driving member 60 is provided between the forward and reverse rotation wheels 51, and the driving wheel 52 is provided with the forward and reverse rotation wheels 51 respectively corresponding to the upper and lower sides at the time of the forward and reverse rotation, thereby driving the clutch member 53 to rotate.

In this embodiment, there are two embodiments of the clutch 53, and as shown in fig. 2 to 9, a first embodiment of the clutch 53 is shown: the clutch mechanism comprises a plurality of first one-way teeth 5111 which are fixedly formed on the bottom surface of the first gear 511, are sequentially arranged at intervals along the circumference, have an inclined surface on one side facing the rotating direction and an upright surface on the opposite side, a plurality of second one-way teeth 5222 which are fixedly formed on the top surface of the second gear 522, are sequentially arranged at intervals along the circumference, have an inclined surface on one side facing the rotating direction and an upright surface on the opposite side, the inclined surfaces of the first one-way teeth 5111 and the second one-way teeth 5222 are opposite, the rotating directions of the first one-way teeth 5111 and the second one-way teeth 5222 are also opposite, and at least one second through hole 521 which penetrates through the driving wheel 52 up and down, in the embodiment, by taking one example, a clutch pin 531 which can move up and down in a column shape in the second through hole 521 is movably arranged in the second through hole, and the top and the bottom of the clutch pin 531 are respectively provided with opposite inclined surfaces, in the above, the inclined surface at the top of the clutch pin 531 and the inclined surface of the first one-way tooth 5111 are pressed against each other to force the clutch pin 531 to move downward from the second through hole 521, so that the vertical surface at the bottom of the clutch pin 531 and the vertical surface of the second one-way tooth 5222 abut against each other to drive the second gear 522 to rotate, otherwise the clutch pin 531 moves upward from the second through hole 521 to drive the first gear 511 to rotate, because the top and the bottom of the clutch pin 531 have opposite inclined surfaces, and the inclined surface at the upper end of the clutch pin 531 and the inclined surface of the corresponding adjacent first one-way tooth 5111 are in the same direction, and the inclined surface at the lower end of the clutch pin 531 and the adjacent second one-way tooth 5222 are in the same direction, when the driving wheel 52 is driven by the motor 61 to rotate clockwise, the inclined surface at the lower end of the clutch pin 531 is pressed by the inclined surface of the second one-way tooth 5222, the clutch pin 531 is caused to keep moving upward, at this time, the vertical surface of the clutch pin 531 abuts against the vertical surface of the first one-way tooth 5111, the first gear 511 where the first one-way tooth 5111 is located is driven to rotate, the eccentric shaft sleeve 334 located on the left side in the drawing starts to operate, the leather cup 321 in the diaphragm chamber 31 on the left side starts to perform suction and extrusion actions to pump water, and conversely, when the motor 61 rotates counterclockwise by changing the rotation direction of the motor 61, the leather cup 321 in the diaphragm chamber 31 on the right side in the drawing starts to perform suction and extrusion actions to pump water. Of course, since the output shaft of the motor 61 passes through the bottom wall of the driving seat 40 and the center shafts of the forward and reverse rotation wheel 51 and the second gear 522 rotatably disposed at the bottom of the inner cavity of the driving seat 40 and is fixedly connected to the driving wheel 52, a third through hole 62 penetrates through the bottom wall of the driving seat 40 and the center shafts of the forward and reverse rotation wheel 51 and the second gear 522 disposed at the bottom of the inner cavity of the driving seat 40 from bottom to top, the diameter of the third through hole 62 is larger than that of the output shaft of the motor 61, and the outer wall of the output shaft of the motor 61 does not contact with the inner wall 62 of the third through hole, so as to ensure that the output shaft of the motor 61 does not affect the second gear 522, and finally, the end of the output shaft of the motor 61 is fixedly connected to the center shaft of the driving wheel 52.

Fig. 10 shows a second embodiment of the clutch 53: it can be seen from the figures that the present embodiment is basically the same as the first embodiment, and only differs from the first embodiment in the clutch pin 531, and specifically includes a plurality of first one-way teeth 5111A fixedly formed on the bottom surface of the first gear 511 and arranged at intervals along the circumference, each having an inclined surface on one side and an upright surface on the opposite side, and a plurality of second one-way teeth 5222A fixedly formed on the top surface of the second gear 522 and arranged at intervals along the circumference, each having an inclined surface on one side and an upright surface on the opposite side, wherein the inclined surfaces of the first one-way teeth 5111A and the second one-way teeth 5222A face in opposite directions, and thus the present embodiment has basically the same structure as the first embodiment, and the important point is that: at least one elastic piece A531A which has the same direction as the inclined plane of the first one-way tooth 5111A and the end part of which can be resisted on the vertical plane of the first one-way tooth 5111A is arranged on the upper surface of the driving wheel 52, at least one elastic piece B531B which has the same direction as the inclined plane of the second one-way tooth 5222A and the end part of which can be resisted on the vertical plane of the second one-way tooth 5222A is arranged on the lower surface of the driving wheel 52, the elastic piece A531A and the elastic piece B531B are in two opposite and upside down 'crosses' shapes in the embodiment, the elastic piece A531A and the elastic piece B531B are both made of metal materials, the first one-way tooth 5111A and the second one-way tooth 5222A are both made of plastic materials, friction consumption can be reduced between two different materials, the service life can be prolonged, the inclined plane of the elastic piece A531A and the elastic piece B531B are arranged in the same way as the inclined plane of the clutch pin 531 in the first embodiment, only the elastic pieces a531A and B531B have elasticity, so that when they are driven by the driving wheel 52 to rotate and have two adjacent inclined surfaces to press, the elastic pieces will deform and bend downward, and the end portions will push the vertical surfaces of the upper and lower unidirectional teeth to drive the corresponding counter-rotating wheels 51 to rotate.

So far, the effectual work of having solved two antithetical couplet row pump bodies of single motor independent control respectively of the structure combination that describes in the above-mentioned embodiment need not to change the flow direction because what traditional diaphragm pump structure caused needs independent design change-over valve again, need not to use two motors to control respectively yet, and simple structure is worth promoting.

While there have been shown and described the fundamental principles and principal features of the invention and advantages thereof, it will be understood by those skilled in the art that the invention is not limited by the embodiments described above, which are given by way of illustration of the principles of the invention, but is susceptible to various changes and modifications without departing from the spirit and scope of the invention as defined by the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.