Pump device

Abstract

A pump device according to the present invention is provided with a holder mechanism which can be easily attached to a pump main body, is unlikely to cause a product failure, and can easily attach various pump heads having different attachment pitches. A pump device is provided with a pump main body having a built-in drive source, a holder mechanism attached to the pump main body, and a pump head attached to the pump main body via the holder mechanism. The bracket mechanism comprises: a first bracket part which has a first wall part and is attached to the pump main body; a second bracket part which is mounted on the first bracket part and on which the pump head can be mounted; and a nut plate disposed between the first holder part and the second holder part. The nut plate is provided with a set of nut holes and other sets of nut holes except the set of nut holes.

Description

Technical Field

[0001] The utility model relates to a pump device. Background Art

[0002] In the past, a pump device is known in which a pump head is mounted on a pump body that has a pump drive source built in (housed). For example, a pump device of the type in which a driving member such as a diaphragm performs reciprocating motion can be cited, and this pump device has a drive source such as a solenoid housed inside the pump body.

[0003] The driving source, for example, has a driving shaft, and the driving member is mounted on the top end of the driving shaft. Furthermore, the driving source can be fixed to the pump body, for example, by screwing, from the mounting side of the pump head, inside the pump body (for example, refer to the following patent document 1).

[0004] In this case, a bracket made of, for example, resin is provided on the end face of the pump body on the side where the pump head is installed. A plurality of nuts are provided on the bracket, which are inserted at a pitch corresponding to the arrangement pitch (installation pitch) of the mounting screws of the pump head. In such a pump device, when the pump head is mounted on the pump body, first, the bracket is made integral with the pump body. Then, the pump head is mounted on the integrated bracket on the pump body by screwing.

[0005] Prior art literature

[0006] Patent Literature

[0007] Patent Document 1: Japanese Patent Publication No. 2012-202274 Summary of the invention

[0008] Technical problem to be solved by the invention

[0009] However, the conventional pump device disclosed in Patent Document 1 has a technical problem that, for example, a plurality of pump heads having mounting screws at different pitches depending on the volume of the pump chamber cannot be directly mounted on the pump body.

[0010] In order to solve this problem, the following pump device is known: a plurality of brackets corresponding to a plurality of pump heads having different installation pitches of the installation screws, for example, a plurality of brackets into which nuts having different pitches are inserted are prepared, and the pump head is installed on the pump body through the bracket corresponding to the pump head to be installed. However, in order to replace the bracket, the bracket, the driving source such as the solenoid stored in the bracket, the plate on the back side, etc. must be removed from the pump body, and the pump as a whole must be disassembled.

[0011] In addition, it is not realistic to insert multiple sets of nuts with different pitches into the bracket in order to cope with various pump heads with one bracket, due to interference between the nuts, reduced strength of the bracket, reduced waterproofness, etc. In addition, when a nut plate having multiple sets of nut holes is inserted into the bracket instead of inserting multiple sets of nuts into the bracket, the fluidity of the molding resin deteriorates, weld lines are easily generated, and the risk of cracks is also increased, which is likely to cause product defects.

[0012] Furthermore, since the pump device of the prior art requires various dedicated brackets according to the size of the pump head corresponding to the volume size of the pump chamber and the size of the driving source, it is difficult to achieve component standardization so that pump heads corresponding to various pump sizes can be installed through one bracket.

[0013] The utility model aims to eliminate the above-mentioned problems of the prior art and provide a pump device having a bracket mechanism that is easy to install on a pump body and is unlikely to cause product failures, and can easily install various pump heads with different installation intervals.

[0014] Solutions to technical problems

[0015] The pump device of the utility model comprises: a pump body with a built-in driving source, a bracket mechanism installed on the pump body, and a pump head installed on the pump body through the bracket mechanism; the bracket mechanism comprises: a first bracket portion having a first wall portion and installed on the pump body, a second bracket portion installed on the first bracket portion and capable of installing the pump head, and a nut plate arranged between the first bracket portion and the second bracket portion; the nut plate having a group of nut holes and other groups of nut holes except the group of nut holes; the pump body having a plurality of first insertion holes adapted to the group of nut holes; the first bracket portion having, on the first wall portion, a plurality of first insertion holes adapted to the group of nut holes The pump head has a plurality of second through holes matched with the nut holes of the other groups of the nut plate, the second bracket has a plurality of second hole portions matched with the nut holes of the other groups, the first bracket and the nut plate are fixed to the pump body by passing the first bolt through the plurality of first through holes of the pump body and the plurality of first hole portions of the first bracket portion and fastening them to the one group of nut holes, the pump head and the second bracket are fixed to the first bracket portion by passing the second bolt through the plurality of second through holes of the pump head and the plurality of second hole portions of the second bracket portion and fastening them to the nut holes of the other groups.

[0016] In one embodiment of the present invention, in the nut plate, the group of nut holes is arranged at a position farther from the center than the other groups of nut holes.

[0017] In another embodiment of the utility model, a plurality of the first bracket parts are provided so as to be replaceable according to the size of the pump body; a plurality of the second bracket parts are provided so as to be replaceable according to the size of the pump head; and one of the plurality of nut plates having different distances from the center of the nut holes of the other groups is respectively provided and configured according to the size of the pump body and the size of the pump head.

[0018] In yet another embodiment of the present invention, there is also a second gasket for sealing the periphery of the plurality of second hole portions of the second bracket portion, the second gasket comprising: a plurality of annular sealing portions arranged around the plurality of second hole portions, and a connecting portion connecting the plurality of sealing portions, the connecting portion being thinner than the sealing portion and forming a partially discontinuous circular ring shape.

[0019] In still another embodiment of the present invention, a pump base fixed to the pump body and used for installing the device is further provided.

[0020] In yet another embodiment of the present invention, there is a first gasket arranged on the outer peripheral side of the nut plate arranged between the first bracket portion and the second bracket portion, and in the bracket mechanism, at least the second bracket portion, the nut plate and the first gasket have a rectangular shape.

[0021] In yet another embodiment of the present invention, the pump head comprises: a pump chamber, and a suction port and a discharge port for conveying fluid connected to the pump chamber; the pump device comprises a driving component driven by the driving source in the pump chamber; the driving source comprises a driving shaft with the driving component installed at the top end thereof; the first bracket portion, the second bracket portion and the nut plate respectively have a central opening portion through which the driving shaft of the driving source can be inserted.

[0022] In still another embodiment of the present invention, the second gasket is provided at intervals around the central opening of the second bracket portion, and the surfaces of one side of the plurality of sealing portions and the connecting portion are formed as flat surfaces.

[0023] In yet another embodiment of the present invention, the second bracket portion has a groove-shaped receiving portion on a connection surface with the pump head, and the receiving portion is formed so that the plurality of sealing portions and the connecting portion of the second gasket can be embedded therein.

[0024] In yet another embodiment of the present invention, the driving component is a diaphragm; the second bracket portion includes a pressing portion and a second wall portion having a first wall surface, the pressing portion and the pump head clamp the diaphragm, the first wall surface is connected to the inner circumferential wall surface of the pressing portion and forms a space portion together with the inner circumferential wall surface of the pressing portion on the rear side of the diaphragm; it has a groove portion, the groove portion includes: a groove portion formed on the first wall surface below the central opening portion of the second wall portion, and a hole portion connected to the groove portion and extending toward the bottom of the second bracket portion; the storage portion is formed by removing a thick wall portion on one side of the connecting surface corresponding to the formation position of the groove portion around the pressing portion; the second gasket is embedded in the storage portion in such a way that the opening side of the storage portion becomes the flat surface.

[0025] Effects of the Invention

[0026] According to the utility model, a bracket mechanism can be provided which is easy to install to a pump body, is unlikely to cause product failure, and can simply install various pump heads having different installation intervals. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a cross-sectional view schematically showing a pump device according to one embodiment of the present invention.

[0028] Figure 2 The figure is a developed perspective view schematically showing a support mechanism of the pump device.

[0029] Figure 3 It is a front view schematically showing the second bracket portion of the bracket mechanism.

[0030] Figure 4 It is a side view schematically showing the second gasket.

[0031] Figure 5 It is a front view schematically showing another example of the second bracket part.

[0032] Figure 6 It is a front view schematically showing still another example of the second bracket part.

[0033] Description of Reference Numerals

[0034] 10 Solenoid

[0035] 20 Pump body

[0036] 30 bracket mechanism

[0037] 31Stand 1

[0038] 31a 1st wall

[0039] 31b 1st hole

[0040] 31c center opening

[0041] 31d surface

[0042] 32 2nd bracket part

[0043] 32a Insertion hole (second hole)

[0044] 32b annular convex part

[0045] 32e groove part

[0046] 33 Nut Plate

[0047] 33a Center opening

[0048] 33b 1st nut hole

[0049] 33c 2nd nut hole

[0050] 34 1st pad

[0051] 35 2nd pad

[0052] 35a Sealing part

[0053] 35b Connection

[0054] 36 Storage Department

[0055] 100 pump units DETAILED DESCRIPTION

[0056] Hereinafter, the pump device of the embodiment of the utility model will be described in detail with reference to the attached drawings. However, the following embodiments do not limit the utility model involved in each claim, and not all the feature combinations described in the embodiments are necessary for the solution of the utility model.

[0057] In addition, in the following embodiments, the same or equivalent components are marked with the same reference numerals and repeated descriptions are omitted. In addition, in the embodiments, the configuration, scale, and size of each component are sometimes exaggerated or reduced to be expressed in a state inconsistent with the actual state, and sometimes the description of some components is omitted for expression.

[0058] [Structure of the pump device]

[0059] Figure 1 This is a cross-sectional view schematically showing a pump device according to one embodiment of the present invention. Figure 2 Schematically shows the unfolded stereogram of the support mechanism of the pump device. Figure 3 It is a front view schematically showing the second bracket portion of the bracket mechanism. Figure 4 It is a side view schematically showing the second gasket. Figure 5 It is a front view schematically showing another example of the second bracket part. Figure 6 It is a front view schematically showing still another example of the second bracket part.

[0060] like Figure 1 As shown, a pump device 100 according to an embodiment of the present invention is configured to include: a pump body 20 having a solenoid 10 as a driving source built therein (housed therein), and a pump head 50 mounted on the pump body 20. The pump body 20 is formed, for example, in a rectangular shape as a whole.

[0061] In addition, the pump device 100 is configured to include: a bracket mechanism 30 for mounting the pump head 50 on the pump body 20; and a reciprocating member such as a diaphragm 60, which is a driving member driven by the solenoid 10. Hereinafter, the direction of the pump device 100 toward the pump head 50 mounting side of the pump body 20 is referred to as the front, and the direction toward the opposite side is referred to as the rear.

[0062] The solenoid 10 includes a stator 11 and a mover 12. The stator 11 includes, for example, a first yoke 13a formed in a bottomed cylindrical shape with an inner circumference protruding toward the rear, a cylindrical coil 15 accommodated in the first yoke 13a, and a coil frame 16 around which the coil 15 is wound. In addition, the stator 11 includes a second yoke 13b that blocks the rear opening of the first yoke 13a and fixes the coil frame 16 around which the coil 15 is wound. The first yoke 13a, the second yoke 13b, and the mover 12 are made of, for example, a magnetic body.

[0063] The mover 12 is composed of a magnetic body formed into an annular shape, for example, and is accommodated in a cylindrical space between the protruding portion of the inner circumference of the first yoke 13a and the rear end position of the second yoke 13b. The drive shaft 14 is fixed to the center hole 12a of the mover 12 by a method such as press-fitting. The drive shaft 14 is inserted into the inner side of the inner circumference of the first yoke 13a at the center of the stator 11, and is supported by the bearing 17 in a manner that allows reciprocating motion in the axial direction.

[0064] The movable member 12 is supported in a manner that allows reciprocating motion in the axial direction by a bearing 13c mounted on the inner periphery of the second yoke 13b. In addition, an annular spring accommodation space 13d open toward the rear side is formed in the inner periphery of the first yoke 13a, and a return spring 18 for applying a spring force to the movable member 12 to move backward is mounted between the spring accommodation space 13d and the movable member 12.

[0065] The solenoid 10 drives the drive shaft 14 in the reciprocating direction indicated by the arrow in the figure through the electromagnetic force of the coil 15 and the spring force of the return spring 18. It should be noted that when the drive shaft 14 is Figure 1 When it is shown in the front, it shows the state that the coil 15 is energized. At the top end of the drive shaft 14, a diaphragm 60 is installed by inserting a bolt 61.

[0066] The diaphragm 60 is a component obtained by integrally molding an insert bolt 61 inside a resin such as tetrafluoroethylene resin (PTFE) and ethylene propylene rubber (EPDM). The diaphragm 60 is driven in the pump chamber 51 of the pump head 50 by the solenoid 10 accommodated in the pump body 20. The diaphragm 60 is installed in a liquid-tight manner in a state where the peripheral edge portion 63 is sandwiched between the annular convex portion 32b as the pressing portion of the second bracket portion 32 described below and the pump head 50, and the front side of the central portion 62 faces the pump chamber 51.

[0067] It should be noted that a diaphragm seal 65 is installed on the rear side of the retainer 64 disposed between the diaphragm 60 and the top end of the drive shaft 14. The diaphragm seal 65 seals between the outer peripheral surface of the drive shaft 14, the rear end surface on the rear side around the central opening 32d of the second bracket part 32, and the peripheral end surface on the front side of the central opening 31c of the first bracket part 31. The diaphragm seal 65 is composed of an elastic body whose part is formed into a bellows shape. Since the diaphragm seal 65, the part formed into the bellows shape, plays the role of a buffer component, it is configured to maintain sealing even when the drive shaft 14 reciprocates.

[0068] The housing 21 of the pump body 20 is made of, for example, a resin member. The pump body 20 is open on the front side and has a storage space 21a that can store almost the entire solenoid 10. In addition, the pump body 20 has a pump base 20a fixedly provided at the bottom for mounting the device. The storage space 21a of the pump body 20 is formed in, for example, a cylindrical shape.

[0069] It should be noted that, outside the storage space 21a of the pump body 20 (in Figure 1 , overlapping the illustration), a plurality of first insertion holes 22 are provided that penetrate the pump body 20 in the front-rear direction. In addition, the pump body 20, except for the pump base 20a, has, for example, an accordion-like shape with a plurality of peaks and valleys formed along the axial direction of the drive shaft 14.

[0070] In addition, a control unit 90 including an operation unit and a display unit of the pump device 100 is installed above the pump body 20. The control unit 90 is configured to control the operation of the solenoid 10, etc., and is operated by receiving power supply by connecting an electric wire 91 extending to the outside to a power supply unit, etc., not shown.

[0071] In addition, an adjustment disk portion 80 is provided on the rear side of the pump body 20, and the adjustment disk portion 80 is connected to a stopper 88 for adjusting the stroke of the mover 12 of the solenoid 10 through a screw 83. The adjustment disk portion 80 has a rotation operation portion 89 and a cover portion 87 mounted on the rotation operation portion 89, and is provided so as to be rotatable around the drive shaft 14.

[0072] The user can adjust the stroke of the mover 12 by rotating the adjustment dial 80. It should be noted that a plurality of O-rings 88a are installed between the stopper 88 and the pump body 20, and the stopper 88 is fixed so as not to rotate due to vibrations during operation of the pump device 100.

[0073] The pump head 50 is formed of a metal part such as a resin part or stainless steel. The pump head 50 has a pump chamber 51 formed in the center. Although not shown in the figure, the pump head 50 has a plurality of mounting holes (second insertion holes) arranged at a predetermined pitch, for example. These plurality of mounting holes are arranged to align with a plurality of insertion holes (second hole portion) 32a (see FIG. 1 ) formed on the front bracket (second bracket portion) 32 of the bracket mechanism 30 described below. Figure 2 ) to set the same spacing.

[0074] The pump head 50 is mounted on the front side of the storage space 21a of the pump body 20 via the bracket mechanism 30. The pump head 50 has a suction port 52 and a discharge port 53 which communicate with the pump chamber 51 and are used to transport the fluid.

[0075] The suction port 52 of the pump head 50 is communicated with the lower part of the pump chamber 51. The discharge port 53 of the pump head 50 is communicated with the upper part of the pump chamber 51. The pump head 50 is provided with a first connection port 54 disposed below the suction port 52 and on the suction side of the conveying fluid. In addition, the pump head 50 is provided with a second connection port 55 disposed above the discharge port 53 and on the discharge side of the conveying fluid.

[0076] The first connection port 54 and the second connection port 55 are connected to the pump chamber 51 through the suction port 52 and the discharge port 53, respectively. A first cylindrical connection adapter 57 in which a suction valve 56 is assembled is connected to the first connection port 54. A second cylindrical connection adapter 59 in which a discharge valve 58 is assembled is connected to the second connection port 55.

[0077] A hose adapter 57c is inserted and installed on the lower side of the first connection adapter 57. A cylindrical hose stopper 57d is installed on the conical side where the top of the hose adapter 57c is tapered. The outer peripheral portion of the lower side of the first connection adapter 57 is connected to a cylindrical first joint 57a, and the first joint 57a accommodates the hose stopper 57d in a manner that allows it to move closer to or farther from the hose adapter 57c. The first joint 57a connects the suction side flow path 57b of the conveying fluid that extends from the center of the hose adapter 57c to the lower side of the pump head 50 to the flow path 57e of the first connection adapter 57.

[0078] The second connection adapter 59 is connected to the third connection adapter 49 via a connection nut 58a. The third connection adapter 49 is formed into a three-way branched cylindrical shape having a T-shaped cross section. An exhaust adjustment screw 49a is connected to the upper side of the third connection adapter 49. Although not shown in the figure, the side side of the third connection adapter 49 is connected to an exhaust joint and an exhaust flow path.

[0079] In addition, a hose adapter 49d is inserted and installed on the front side of the third connection adapter 49. A cylindrical hose stopper 49e is installed on the conical side where the top of the hose adapter 49d is tapered. The outer peripheral portion of the front side of the third connection adapter 49 is connected to a cylindrical second joint 49b, and the second joint 49b accommodates the hose stopper 49e in a manner that allows it to move closer to or farther from the hose adapter 49d.

[0080] The second joint 49b connects the discharge side flow path 49c of the conveying fluid extending to the front side of the pump head 50 through the center of the hose adapter 49d to the second connection adapter 59 through the flow path 49f of the third connection adapter 49. It should be noted that the suction valve 56 and the discharge valve 58 of the pump head 50 are composed of a common valve cylinder of a two-stage ball valve in which the ball valve is arranged in two stages, such as upper and lower stages, in the example shown in the figure, but are not limited to this.

[0081] [Stand mechanism structure]

[0082] The support mechanism 30, for example Figure 2 As shown, the support mechanism 30 includes a first support portion 31, a second support portion 32, a nut plate 33, and a first gasket 34. The support mechanism 30 may further include a second gasket 35. The support mechanism 30 is disposed between the pump head 50 and the pump body 20.

[0083] The bracket mechanism 30 is formed such that at least the second bracket portion 32, the nut plate 33, and the first gasket 34 have a rectangular shape. The first bracket portion 31 of the bracket mechanism 30 can also be formed to have a rectangular shape, but in this embodiment, the rectangular shape includes a portion extending in a trapezoidal shape from a portion below. It should be noted that the first bracket portion 31 has a surface portion 31d, and the surface portion 31d has a bellows-shaped shape with a plurality of hills and valleys formed, similarly to the pump body 20.

[0084] The first bracket part 31 and the second bracket part 32 of the bracket mechanism 30 are composed of an integrally molded resin component. In addition, the nut plate 33 is composed of a metal component. The nut plate 33 is arranged between the first bracket part 31 and the second bracket part 32. The nut plate 33 has a central opening 33a at the center, and has a plurality of groups of nut holes at different distances from the center, that is, a first nut hole (a group of nut holes) 33b and a second nut hole (another group of nut holes) 33c.

[0085] For example, four first nut holes 33b and four second nut holes 33c are provided at positions inclined at 45° when viewed from the center axis C. The first nut holes 33b are provided at positions farther from the center (for example, the distance from the center axis C) than the second nut holes 33c on the nut plate 33.

[0086] The first bracket portion 31 has a first wall portion 31a on the front side. The first bracket portion 31 has a first wall portion 31a on the rear side with the spacer 20b (see Figure 1 ) is mounted on the pump body 20. The first bracket portion 31 has a central opening portion 31c through which the drive shaft 14 of the solenoid 10 can be inserted at the center of the first wall portion 31a.

[0087] In addition, the first bracket portion 31 has a plurality of first hole portions 31b on the first wall portion 31a, and the plurality of first hole portions 31b are arranged at a spacing adapted to the plurality of first insertion holes 22 of the pump body 20 and the first nut holes 33b corresponding to the plurality of first insertion holes 22 in the plurality of groups of nut holes of the nut plate 33.

[0088] It should be noted that, although the multiple mounting holes of the pump head 50 are omitted from the illustration, they are arranged at a pitch that matches the second nut holes 33c in the multiple groups of nut holes of the nut plate 33, except for the first nut holes 33b corresponding to the multiple first hole portions 31b. A recessed portion 31f extending along an inclination of 45° when viewed from the center axis C is formed on the first wall portion 31a of the first bracket portion 31, and the recessed portion 31f includes a position corresponding to the second nut hole 33c and a position where the first hole portion 31b is formed.

[0089] The second bracket portion 32 is mounted on the front side of the first bracket portion 31, and the pump head 50 is mounted on the front side thereof. Figure 2 as well as Figure 3 As shown, a central opening portion 32d through which the drive shaft 14 of the solenoid 10 can be inserted is provided at the center.

[0090] The second bracket portion 32 has a plurality of insertion holes 32a arranged at a pitch matching the plurality of mounting holes and the second nut hole 33c of the pump head 50. The second bracket portion 32 has an annular convex portion 32b that clamps the diaphragm 60 with the pump head 50 as described above.

[0091] The second bracket portion 32 includes a wall portion (second wall portion) 32h, which has a wall surface (wall surface) 32f that is connected to the inner peripheral wall surface 32c of the annular protrusion 32b and forms a space portion together with the inner peripheral wall surface 32c of the annular protrusion 32b on the rear side of the diaphragm 60. It should be noted that the annular protrusion 32b of the second bracket portion 32 can also be formed into a flat surface by adjusting the depth dimension of the pump head 50 where the diaphragm 60 is installed. In this case, the flat surface portion functions as a pressing portion, and the diaphragm 60 can be installed on the pump head 50 in a liquid-tight manner.

[0092] In addition, the second bracket portion 32 has a groove portion 32e, which includes: a groove portion 32ea formed on the wall surface 32f below the central opening portion 32d of the wall portion 32h, and a hole portion 32eb connected to the groove portion 32ea and extending toward the bottom of the second bracket portion 32. The groove portion 32e is designed to discharge the leaked conveying fluid to the outside when the conveying liquid leaks into the above-mentioned space portion.

[0093] It should be noted that the first gasket 34 is disposed on the outer peripheral side of the nut plate 33 between the first bracket portion 31 and the second bracket portion 32, and isolates the two bracket portions 31 and 32 from the outside in a liquid-tight manner. Figure 2 as well as Figure 4 As shown, the peripheries of the plurality of insertion holes 32a of the second bracket portion 32 are sealed.

[0094] The second gasket 35 includes: a plurality of annular sealing portions 35a arranged around the plurality of insertion holes 32a, and a connecting portion 35b connecting the plurality of sealing portions 35a. The connecting portion 35b of the second gasket 35 is arranged at intervals around the central opening 32d of the second bracket portion 32, that is, in the case shown in the figure, for example, on the outer peripheral side of the annular protrusion 32b.

[0095] In addition, the connecting portion 35b of the second gasket 35 is thinner than the sealing portion 35a, for example, formed into a discontinuous annular shape with a notch portion 35c as a part. It should be noted that the second gasket 35 has a flat surface 35d formed on one side of the plurality of sealing portions 35a and the connecting portion 35b. In order to install the second gasket 35, the second bracket portion 32 has a storage portion 36 formed into a groove shape for the plurality of sealing portions 35a and the connecting portion 35b to be embedded in the side of the connecting surface with the pump head 50.

[0096] The storage portion 36 is continuously provided around the plurality of insertion holes 32a and their inner peripheral sides (outer peripheral sides of the annular protrusion 32b), and is formed into a groove shape with different depths that matches the shape of the second gasket 35. It should be noted that the storage portion 36 is formed by removing the thick-walled portion (thick-walled part) 32g on the connecting surface side corresponding to the formation position of the groove portion 32e around the annular protrusion 32b. Furthermore, the second gasket 35 is embedded in the storage portion 36 and installed on the second bracket portion 32, so that the opening side of the storage portion 36 formed in this way becomes a flat surface 35d. It should be noted that the storage portion 36, as Figure 3 As shown, recessed portions 36a for inserting tools or the like for removing the second gasket 35 may be provided at, for example, three locations in the circumferential direction.

[0097] The pump head 50 is mounted to the pump body 20 in the following manner by the bracket mechanism 30 thus constructed. First, the first bracket portion 31 and the nut plate 33 are arranged on the front side of the pump body 20. Then, first bolts 81 of a predetermined length for mounting are respectively inserted into the plurality of first insertion holes 22 of the pump body 20 from the rear side of the pump body 20.

[0098] The first bolt 81 passes through the first insertion hole 22 and the first hole portion 31b of the first bracket portion 31, and reaches the nut plate 33 on the front side of the first wall portion 31a. By tightening the first bolt 81 in the first nut hole 33b of the nut plate 33, the first bracket portion 31 and the nut plate 33 are firstly mounted and fixed on the pump body 20 in a manner of blocking the storage space 21a.

[0099] Next, after the first gasket 34 is arranged in the groove portion 31e of the first bracket portion 31 and the second gasket 35 is inserted into the housing portion 36 of the second bracket portion 32, the pump head 50 and the second bracket portion 32 are arranged on the front side of the first bracket portion 31. Then, second bolts 82 of a predetermined length for installation are respectively inserted into the plurality of mounting holes of the pump head 50 and the plurality of insertion holes 32a of the second bracket portion 32 from the front side of the pump head 50.

[0100] The second bolt 82 passes through the mounting hole of the pump head 50 and the insertion hole 32a of the second bracket portion 32, and reaches the nut plate 33 mounted on the front side of the first bracket portion 31 of the pump body 20. By tightening the second bolt 82 in the second nut hole 33c of the nut plate 33, the pump head 50 is fixed to the second bracket portion 32 in a liquid-tight manner via the second gasket 35, and the second bracket portion 32 is fixed to the first bracket portion 31 in a liquid-tight manner via the first gasket 34. The top end of the second bolt 82 protruding from the second nut hole 33c of the nut plate 33 is received by the recess 31f of the first bracket portion 31. In this way, the pump head 50 is mounted on the pump body 20 via the bracket mechanism 30.

[0101] It should be noted that, for example, the first bracket portion 31 of the bracket mechanism 30 may be provided in plurality so as to be replaceable according to the size of the pump body 20 (the size of the solenoid 10). Similarly, the second bracket portion 32 of the bracket mechanism 30 may be provided in plurality so as to be replaceable according to the size of the pump head 50 (the volume size of the pump chamber 51).

[0102] Furthermore, in the bracket mechanism 30, the first bracket portion 31 and the second bracket portion 32 are replaceable as described above, so a plurality of nut plates 33 can be used to appropriately arrange them according to the size of the pump body 20 and the size of the pump head 50. That is, as an example, the nut plate 33 can be replaced with other nut plates 33A and 33B (see FIG. 1 ) each having a second nut hole 33c provided at a different distance from the center. Figure 2 ) and other uses.

[0103] exist Figure 2 In the example shown, the outer dimensions of the nut plates 33, 33A, 33B and the positions of the first nut holes 33b are unchanged, but the size of the central opening 33a and the positions of the second nut holes 33c are different. Figure 3 The second bracket part 32 having a larger inner diameter D1 of the annular protrusion 32 b is used in combination.

[0104] In addition, the nut plate 33A can be used with, for example, Figure 5 The inner diameter D2 of the annular protrusion 32b shown in the figure is smaller than the inner diameter D1 of the second bracket part 32A. Figure 6 The inner diameter D3 of the annular protrusion 32b shown is used in conjunction with the second bracket portion 32B having a smaller inner diameter D2. Therefore, the pump head 50 can be mounted with a pump head whose size is also reduced in the order of the second bracket portion 32, the second bracket portion 32A, and the second bracket portion 32B.

[0105] It should be noted that, although not shown in the figure, when the size of the pump body 20 is different, the nut plates 33, 33A, 33B, as another example, may be formed so that the outer dimensions and the positions of the first nut holes 33b are different. That is, the bracket mechanism 30 is a component for easily mounting various pump heads 50 on various pump bodies 20 by simply appropriately replacing the first bracket portion 31, the second bracket portion 32, and the nut plate 33, etc., according to the size of the pump body 20 and the size of the pump head 50.

[0106] In addition, since the first bracket portion 31 and the second bracket portion 32 of the bracket mechanism 30 are only formed of a molded product of a resin material, cracks caused by welding such as insert molding are unlikely to occur. Therefore, the pump device 100 of this embodiment can have a bracket mechanism 30 that is easy to install on the pump body 20 and is unlikely to cause product failures, and can easily install various pump heads 50 with different installation intervals.

[0107] Although the embodiments of the present invention are described above, the embodiments are only presented as examples and are not intended to limit the scope of the present invention. The novel embodiments can be implemented in various other ways, and various omissions, substitutions, and changes can be made without departing from the gist of the utility model. These embodiments and their variations are also included in the scope and gist of the utility model, and are included in the scope equivalent to the utility model recorded in the scope of the utility model.

Claims

1. A pump device comprising: The pump body has a built-in drive source. a bracket mechanism mounted on the pump body, and A pump head mounted on the pump body by the bracket mechanism, The support mechanism comprises: a first bracket portion having a first wall portion and mounted on the pump body, a second bracket portion mounted on the first bracket portion and capable of mounting the pump head, and a nut plate disposed between the first bracket portion and the second bracket portion, The nut plate has a group of nut holes and other groups of nut holes except the group of nut holes. The pump body has a plurality of first insertion holes adapted to the set of nut holes. The first bracket portion has a plurality of first hole portions on the first wall portion adapted to the group of nut holes. The pump head has a plurality of second insertion holes adapted to the other groups of nut holes of the nut plate. The second bracket part has a plurality of second hole parts adapted to the nut holes of the other groups, The first bracket portion and the nut plate are fixed to the pump body by passing a first bolt through the plurality of first insertion holes of the pump body and the plurality of first hole portions of the first bracket portion and fastening the first bolt to the set of nut holes. The pump head and the second bracket portion are fixed to the first bracket portion by passing second bolts through the plurality of second insertion holes of the pump head and the plurality of second hole portions of the second bracket portion and fastening them to the nut holes of the other group.

2. The pump device according to claim 1, characterized in that In the nut plate, the group of nut holes is arranged at a position farther from the center than the other groups of nut holes.

3. The pump device according to claim 1 or 2, characterized in that A plurality of the first bracket parts are provided so as to be replaceable according to the size of the pump body. The second bracket part is provided in plurality so as to be replaceable according to the size of the pump head. One of the plurality of nut plates is configured according to the size of the pump body and the size of the pump head, and the plurality of nut plates are respectively arranged so that the distances from the centers of the nut holes of the other groups are different.

4. The pump device according to claim 3, characterized in that further comprising a second gasket for sealing the periphery of the plurality of second holes of the second bracket portion, The second gasket has: a plurality of annular sealing portions arranged around the plurality of second hole portions, and A connecting portion connecting the plurality of sealing portions, The connecting portion is thinner than the sealing portion and is formed in a partially discontinuous annular shape.

5. The pump device according to claim 4, characterized in that A pump base for installing the device fixed to the pump body is also provided.

6. The pump device according to claim 5, characterized in that A first gasket is provided on the outer peripheral side of the nut plate, wherein the nut plate is between the first bracket portion and the second bracket portion. In the bracket mechanism, at least the second bracket portion, the nut plate, and the first gasket have a rectangular outer shape.

7. The pump device according to claim 6, characterized in that The pump head comprises: a pump chamber, and a suction port and a discharge port for conveying fluid which are connected to the pump chamber. The pump device includes a driving member driven by the driving source in the pump chamber. The driving source has a driving shaft, and the driving component is installed at the top end of the driving shaft. The first bracket portion, the second bracket portion, and the nut plate each have a central opening portion through which the drive shaft of the drive source can be inserted.

8. The pump device according to claim 7, characterized in that The second gasket is provided at intervals around the central opening of the second bracket portion, and the surfaces of one side of the plurality of sealing portions and the connecting portion are formed into a flat surface.

9. The pump device according to claim 8, characterized in that The second holder portion has a groove-shaped housing portion on a connection surface with the pump head, into which the plurality of sealing portions and the connection portion of the second gasket can be fitted.

10. The pump device according to claim 9, characterized in that The driving member is a diaphragm, The second bracket portion includes a pressing portion and a second wall portion having a first wall surface, the pressing portion and the pump head clamp the diaphragm, the first wall surface is continuous with the inner peripheral wall surface of the pressing portion and forms a space portion together with the inner peripheral wall surface of the pressing portion at the rear side of the diaphragm, having a groove portion, the groove portion including a groove portion formed on the first wall surface below the central opening portion of the second wall portion, and a hole portion connected to the groove portion and extending toward the bottom of the second bracket portion, The receiving portion is formed by removing a thick portion on the connecting surface side around the pressing portion corresponding to the formation position of the groove portion, The second gasket is embedded in the housing portion such that the opening side of the housing portion becomes the flat surface.

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