Micro fluid pumps and pressure fluid application equipment

Abstract

The present invention relates to a micro fluid pump, comprising: a motor; a main housing connected to the motor; a rotating wheel, which receives the torque transmitted by the motor and rotates and is provided with an eccentric swing shaft; a diaphragm body mounting seat connected to the main housing and provided with a diaphragm body having a plurality of diaphragm units; a crankshaft, the first end of which is connected to the swing shaft and the second end is connected to the diaphragm body to drive the diaphragm unit to reciprocate compression and suction movements; a transmission assembly, comprising a first gear arranged on the motor shaft, an intermediate shaft, a second gear arranged on the intermediate shaft, a third gear rotating integrally with the second gear, and a fourth gear rotating integrally with the rotating wheel; wherein, in the side wall of the main housing, an opening is arranged at a position corresponding to the installation level of the second gear and the third gear, and the size of the opening is set to at least allow the second gear and the third gear to enter the main housing through the opening. The present invention also relates to a pressure fluid application device, which comprises the micro fluid pump as above.

Description

Technical Field

[0001] The present invention relates to the field of fluid pumps, and more particularly to a micro fluid pump, namely a pressure fluid application device comprising the micro fluid pump. Background Art

[0002] With the widespread application of fluid pumps in civil and commercial fields, higher requirements are placed on fluid pumps, especially micro fluid pumps.

[0003] Current micro fluid pumps (such as micro water pumps) generally include a motor and a main housing connected to the motor. The main housing may also generally include: an eccentric wheel, which receives the torque transmitted from the motor and rotates and is fixedly connected to an eccentric shaft; a water bag mounting seat, on which a water bag body having multiple water bag units is mounted; a curved rod, one end of which is connected to the eccentric shaft and the other end of which is connected to the water bag mounting seat, so that the curved rod can drive the water bag body and its water bag units on the water bag mounting seat to perform reciprocating compression and suction movements to output a fluid with a predetermined pressure; a transmission assembly, including a driving wheel, a driven wheel and an intermediate shaft for holding the driven wheel, etc., which is used to transmit the torque from the motor to the eccentric wheel.

[0004] However, in such a microfluid pump, in order to be able to install all the components constituting the transmission assembly in the main housing, it is necessary to set the main housing relatively large to ensure that the installation of one component does not hinder the installation of another component, thereby failing to achieve a compact microfluid pump and being cost-effective. In addition, in current microfluid pumps, the transmission components are all installed in the internal space of the main housing, which is not convenient for the maintenance and monitoring of the transmission components, such as applying lubricating oil; and when the driven wheel of the transmission component and the intermediate shaft holding it need to be replaced, the entire main housing needs to be disassembled from the microfluid pump, and then other interfering components inside the main housing may also be removed before the driven wheel and the intermediate shaft can be replaced, which makes the whole process very cumbersome, requires a lot of labor, and is too costly. In addition, the main housing of the existing microfluid pump is also not convenient for heat dissipation of the transmission component, which may affect the performance and efficiency of the microfluid pump.

[0005] In addition, in existing micro fluid pumps, when the motor is started and thereby drives the driving force to rotate, the driven wheel that engages with the driving force will undergo polarization, and the polarization of the driven wheel will be transmitted to the intermediate shaft, which may cause the driven wheel and the intermediate shaft to no longer be concentric, and may cause the intermediate shaft to swing, thereby affecting the meshing effect of the driven wheel and the driving wheel, and causing the entire transmission assembly to be unable to operate stably, and even causing the entire micro fluid pump to be unable to operate stably, thereby making the efficiency of the transmission assembly and even the entire micro fluid pump too low, and even affecting its entire service life cycle.

[0006] Therefore, there is a need for an improved microfluid pump that allows overcoming the above-mentioned problems existing in existing microfluid pumps. Summary of the invention

[0007] In order to solve the above technical problems and meet the above requirements, the present invention provides a micro fluid pump, which includes:

[0008] A motor having a motor shaft extending along an axial direction;

[0009] a main housing connected to the motor and defining an accommodating space;

[0010] a rotating wheel, which receives the torque transmitted by the motor to rotate and on which an eccentric swing shaft is arranged;

[0011] A diaphragm body mounting seat connected to the main housing, wherein a diaphragm body having a plurality of diaphragm units is disposed on the diaphragm body mounting seat;

[0012] A bent rod, a first end of which is connected to the swing shaft, and a second end opposite to the first end is connected to the diaphragm body to drive the diaphragm unit to reciprocate compression and suction motion;

[0013] a transmission assembly, comprising a first gear disposed on the motor shaft, an intermediate shaft extending parallel to the axis direction, a second gear disposed on the intermediate shaft, a third gear disposed on the intermediate shaft and rotating integrally with the second gear, and a fourth gear rotating integrally with the rotating wheel;

[0014] Wherein, an opening is provided in the side wall of the main housing at a position corresponding to the installation level of the second gear and the third gear, and the size of the opening is set to at least allow the second gear and the third gear to enter the accommodating space of the main housing through the opening and be installed in place,

[0015] The micro fluid pump further comprises a cover body, and the cover body is mounted to the opening.

[0016] Thus, in the microfluid pump according to the present invention, by providing the opening, the second gear and / or the third gear and / or the intermediate shaft can be conveniently installed in the limited accommodation space in the main housing without having to make the main housing larger, which is conducive to forming a compact microfluid pump. In addition, the opening also allows maintenance of the transmission components in the main housing, such as applying lubricating oil, and allows the second gear and / or the third gear and / or the intermediate shaft to be easily replaced when necessary, saving time and installation costs. In addition, the provision of the opening also allows convenient monitoring of the operation of the components in the main housing.

[0017] In addition, the microfluid pump according to the present invention may further include one or more of the following features, either alone or in combination.

[0018] In some embodiments, the first axial end of the intermediate shaft is mounted to a mounting seat at the bottom of the main housing, and the second axial end of the intermediate shaft is mounted to a support beam connected to the main housing. Thus, by mounting the second axial end of the intermediate shaft to the support beam, which is connected to the main housing, the polarization experienced by the intermediate shaft can be effectively absorbed by the support beam and thus ensure good concentricity between the second gear and the third gear and the intermediate shaft, which can be beneficial to the robust operation of the transmission assembly and thus the overall performance and efficiency of the microfluid pump. In addition, this can prevent the intermediate shaft and even the entire transmission assembly from premature wear, extend the service life cycle of the intermediate shaft and the transmission assembly, and thus improve the cost-effectiveness of the entire microfluid pump. In addition, the fixing plate has a simple structure, so it is easy to process and install, which is further beneficial to cost-effectiveness.

[0019] In some embodiments, the support beam is integrally formed with the main housing. This is because the provision of the opening allows the second gear, the third gear and / or the intermediate shaft to be conveniently installed in the main housing, so there is no need to worry that the support beam installed together with the second shaft end of the central shaft will hinder the installation of the second gear, the third gear and / or the intermediate shaft from top to bottom. In addition, the support beam is integrally formed with the main housing so that the relevant assembly steps can be omitted.

[0020] In some embodiments, the support beam includes a top end and a first branch and a second branch extending from the top end in a V-shape, the second axial end of the intermediate shaft is mounted to the top end of the support beam, and the first branch and the second branch are connected to the side wall of the main housing. This can ensure a stable hold on the intermediate shaft.

[0021] In some embodiments, the opening is a rectangular window.

[0022] In some embodiments, the main housing is rectangular in a cross section perpendicular to the axial direction, and the opening is provided through at least a portion of two adjacent side walls of the main housing at the same time. This can make it easier and more convenient to reach the installation positions of the intermediate shaft, the second gear, and the third gear in the main housing through the opening.

[0023] In some embodiments, the mounting base is integrally formed with the bottom of the main housing.

[0024] According to another aspect of the present disclosure, a pressure fluid application device is provided, comprising the micro fluid pump as described above.

[0025] In some embodiments, the device is a coffee maker.

[0026] In some embodiments, the coffee machine is an espresso machine.

[0027] In some embodiments, the device is a dental hygienist. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present disclosure and should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work. In the drawings:

[0029] Figure 1 A perspective view of a microfluid pump according to an embodiment of the present invention is shown;

[0030] Figure 2 A perspective exploded view of a microfluid pump according to an embodiment of the present invention is shown;

[0031] Figure 3 A longitudinal cross-sectional view showing a microfluid pump in an assembled state according to an embodiment of the present invention is shown;

[0032] Figure 3a Shows Figure 3 A partial view in which the setting position of the support protrusion is shown;

[0033] Figure 4 A partial plan view shows a torque transmission path from a motor to a rotor in a micro fluid pump according to an embodiment of the present invention;

[0034] Figure 5 A perspective view of a bent rod used in a microfluid pump according to an embodiment of the present invention is shown from one side;

[0035] Figure 6 A perspective view of a curved rod used in a microfluid pump according to an embodiment of the present invention is shown from another side;

[0036] Figure 7 Another longitudinal cross-sectional view showing a microfluid pump in an assembled state according to an embodiment of the present invention;

[0037] Figure 8 A perspective view showing a portion of a microfluid pump according to an embodiment of the present invention, showing a fixing plate for an intermediate shaft in a transmission assembly;

[0038] Fig. 9 yes Figure 8 A top view of a portion of the microfluid pump;

[0039] Fig.10 A partial cross-sectional view of a transmission assembly according to various embodiments of the present invention is shown, wherein a reduced diameter portion on the intermediate shaft and a reduced diameter portion located in the center hole of the second gear 114 are schematically shown;

[0040] Fig.11 a perspective view showing a portion of a microfluid pump according to another embodiment of the present invention, showing an opening provided in a side wall of a main housing; and

[0041] Fig.12 Shown according to Fig.11 A top view of a portion of a microfluid pump of an embodiment showing a support beam for an intermediate shaft in a transmission assembly.

[0042] It should be noted that the various drawings only schematically illustrate the positions and installation relationships of the various components of the microfluid pump, rather than being drawn according to an accurate actual scale.

[0043] Reference numerals list

[0044] 100 Micro Fluid Pump

[0045] 110 Motor

[0046] 111 Motor shaft

[0047] 112 First Gear

[0048] 113 Intermediate shaft

[0049] 1131 First shaft end

[0050] 1132 Second shaft end

[0051] 1133 Diameter reduction section

[0052] 114 Second Gear

[0053] 1141 Neck Shrinkage

[0054] 115 Third gear

[0055] 116 Fourth Gear

[0056] 120 main housing

[0057] 121 first longitudinal end

[0058] 122 recess

[0059] 123 Second longitudinal end

[0060] 124 Grooves

[0061] 125 First Pillar

[0062] 126 Screw

[0063] 127 Mounting Seat

[0064] 128 bottom

[0065] 129 Opening

[0066] 1201 Side wall of shell

[0067] 1202 Side wall of housing

[0068] 130 Diaphragm body mounting seat

[0069] 140 Valve seat

[0070] 150 Upper cover

[0071] 160 Diaphragm body

[0072] 161 Diaphragm unit

[0073] 170 Axial support assembly

[0074] 171 Support body

[0075] 172 Support protrusion

[0076] 180 Wheel

[0077] 181 Eccentric hole

[0078] 182 Swing shaft

[0079] 190 Bend Bar

[0080] 191 protrusion

[0081] 192 holes

[0082] 193 Main Panel

[0083] 194 concave part of curved rod

[0084] 195 Hollow

[0085] 196 Inserts

[0086] 210 Fixed plate

[0087] 211 First fixed end

[0088] 212 Second fixed end

[0089] 220 Support beam

[0090] 221 First Branch

[0091] 222 Second Branch

[0092] 223 Top

[0093] 230 Cover

[0094] X Motor rotation axis

[0095] O Center axis of the crankshaft

[0096] C The intersection of the motor rotation axis and the center axis of the crankshaft DETAILED DESCRIPTION

[0097] Below, the microfluid pump according to the embodiment of the present disclosure and the pressure fluid application device including such microfluid pump are described in detail with reference to the accompanying drawings. In order to make the purpose, technical solution and advantages of the present utility model more clear, the technical solution in the embodiment of the present disclosure will be clearly and completely described below in conjunction with the accompanying drawings in the embodiment of the present disclosure. Obviously, the described embodiment is a part of the embodiment of the present disclosure, not all of the embodiments.

[0098] Therefore, the following detailed description of the embodiments of the present disclosure provided in conjunction with the accompanying drawings is not intended to limit the scope of the present disclosure claimed for protection, but merely represents selected embodiments of the present disclosure. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present disclosure.

[0099] Unless otherwise defined in context, singular forms include plural forms. Throughout the specification, the terms "comprising", "having", etc. are used herein to specify the presence of the features, numbers, steps, operations, elements, parts or combinations thereof, but do not exclude the presence or addition of one or more other features, numbers, steps, operations, elements, parts or combinations thereof.

[0100] In addition, even though terms including ordinal numbers such as "first," "second," etc. may be used to describe various components, these components are not limited by these terms, and these terms are only used to distinguish one element from other elements. For example, a first component may be referred to as a second component, and similarly, a second component may be referred to as a first component without departing from the scope of the present disclosure.

[0101] In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the disclosed product is conventionally placed when in use, or are the orientations or positional relationships conventionally understood by those skilled in the art. They are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present disclosure.

[0102] like Figure 1-Figure 4 As shown, Figure 1 FIG. 1 shows a perspective view of a microfluid pump 100 in an assembled state according to an embodiment of the present invention. Figure 2 FIG. 1 shows a perspective exploded view of a microfluid pump 100 according to an embodiment of the present invention. Figure 3 FIG. 2 shows a longitudinal cross-sectional view of a microfluid pump 100 in an assembled state according to an embodiment of the present invention. Figure 4 A partial plan view shows a torque transmission path from a motor to a rotor in a microfluid pump according to an embodiment of the present invention. The microfluid pump 100 includes, for example, at least a motor 110, a main housing 120, a rotor 180, a diaphragm body mounting seat 130, a crankshaft 190, and a transmission assembly.

[0103] Among them, Figure 2-4 As shown, the motor 110 has a motor shaft 111 extending in the direction of the rotation axis X, which is, for example, parallel to the longitudinal direction of the microfluid pump 100, or, for example, coincides with the longitudinal center axis of the microfluid pump 100. It should be noted that the embodiments of the present disclosure are not limited by the rotation speed and type of the motor.

[0104] In a specific embodiment, Figure 1-4As shown, the main housing 120 extends in the longitudinal direction as a whole and is roughly cylindrical in shape, and its cross section is, for example, a square with rounded corners. Of course, the main housing 120 can be set to other shapes as needed. The main housing 120 defines a storage space that can be used to accommodate various components of the microfluid pump 100 according to the present invention, such as the runner 180, the crankshaft 190, the transmission assembly and the optional axial support assembly 170, which will be described in detail later. As shown in the figure, the main housing 120 is connected to the motor 110, for example, at its first longitudinal end 121, it is connected to the motor 110, for example, by the engagement between the gears arranged in the main housing 120 and the gears arranged on the motor shaft 111 to realize the transmission of the torque of the motor 110 to the main housing 120. And for example, the motor 110 and the main housing 120 connected to each other in this way make the motor shaft 111, the motor rotation axis X and the longitudinal center line of the main housing 120 coincide with each other.

[0105] like Figure 2-4 As shown, the rotating wheel 180 may be disposed in the main housing 120 and configured to receive the torque transmitted from the motor 110 and rotate accordingly, and an eccentric swing shaft 182 is disposed on the rotating wheel 180, that is, the swing shaft 182 is offset relative to the central axis of the rotating wheel 180. In a specific embodiment, as Figure 2 As best shown, the rotating wheel 180 is provided with an eccentric hole 181 offset relative to its central axis, and a swing shaft 182 is inserted and fixed in the eccentric hole 181 at one end, so that the swing shaft 182 forms an angle with respect to the motor rotation axis X, for example.

[0106] Reference Figure 1-3 The diaphragm body mounting seat 130 is connected to the main housing 120, for example, it is mounted to the main housing 120 at the second longitudinal end 123 of the main housing 120. The diaphragm body mounting seat 130 is provided with a diaphragm body 160 (such as Figure 2 For example, the diaphragm body 160 may include a plurality of integrally formed water bags (the water bags are, for example, open at the top), wherein each water bag is a diaphragm unit 161.

[0107] like Figure 2-3 As shown, the bent rod 190 may be disposed in the accommodation space, and a first end of the bent rod 190 is connected to the swing shaft 182, and a second end opposite to the first end is connected to the diaphragm body 160. For example, a protrusion 191 may be disposed at the lower longitudinal end of the bent rod 190, and the protrusion 191 may be provided with a hole 192 (at the bottom) for receiving at least a portion of the swing shaft 182. Figure 3 and Figure 5), that is, at least a portion of the swing shaft 182 can be inserted and fixed into the hole 192 to establish a mechanical and dynamic connection between the swing shaft 182 and the bent lever 190. The protrusion 191 can be formed integrally with the bent lever 190, for example. Figure 5-6 As shown, in a specific embodiment, the protrusion 191 can extend downward from the center of the lower longitudinal end of the curved rod 190. Therefore, when the rotating wheel 180 drives the swing shaft 182 eccentrically arranged thereon to rotate together, the swing shaft 182 will drive the curved rod 190 to perform repeated swinging movements, and the curved rod 190 will then drive the diaphragm unit 161 to perform reciprocating compression and suction movements. This reciprocating compression and suction movement is intended to represent that the diaphragm unit 161 inside the diaphragm body 160 is alternately in a compression state and a tension state. For example, if the diaphragm body is a water bag body integrated with multiple water bags, when the curved rod moves downward and pulls down the water bag, the water bag is in a suction movement process, the air pressure inside the water bag decreases, and the fluid enters the water bag; on the contrary, when the curved rod moves upward and squeezes the water bag, the water bag is in a compression movement process, the air pressure inside the water bag increases, and a fluid with high pressure is output.

[0108] like Figure 2 and 8 As shown, in a specific embodiment, in order to effectively transmit the power of the motor to the rotating wheel, the transmission assembly used in the micro fluid pump according to the present invention may include: a first gear 112 arranged on the motor shaft 111, the first gear 112 is, for example, arranged outside the main housing 120, for example, located in a recess 122 arranged on the first longitudinal end 121 of the main housing 120, as shown in FIG. Figure 3 As shown in the figure, an intermediate shaft 113 extending parallel to the axis direction X is provided in the main housing 120; a second gear 114 is provided on the intermediate shaft 113; a third gear 115 is provided on the intermediate shaft 113 and is rotationally fixed relative to the second gear 114; and a fourth gear 116 is rotationally fixed relative to the rotating wheel 180, and the fourth gear 116 is, for example, mounted on a shaft mounted on the bottom of the main housing 120. Thus, through the transmission assembly, the torque generated by the motor 110 is transmitted to the first gear 112 through the motor shaft 111, and then to the second gear 114 meshing with the first gear 112, and then to the third gear 115 rotating integrally with the second gear 114, and then to the fourth gear 116 meshing with the third gear 115, and then to the rotating wheel 180. As a result, the rotating wheel 180 can drive the swing shaft 182 to rotate together.

[0109] When the motor is started, when the torque is transmitted to the first gear 112 and then to the second gear 114 through the motor shaft 111, the second gear 114 may be polarized due to the force, which causes the intermediate shaft 113 supporting the second gear 114 to be polarized. In order to prevent the polarization of the intermediate shaft 113 and the operational instability of the entire transmission assembly and even the entire microfluid pump caused by the polarization, the present invention proposes the following method of fixing the intermediate shaft 113, such as Figure 7-9 As shown: the first axial end 1131 of the intermediate shaft 113 is mounted on a mounting seat 127 provided in the bottom 128 of the main housing 120. The mounting seat 127 can be integrally formed with the bottom 128 of the main housing 120, or can be a separate component fixed to the bottom 128 of the main housing 120. For example, the first axial end 1131 of the intermediate shaft 113 can be inserted into the hole of the mounting seat 127 to form a tight fit to fix the first axial end 1131 of the intermediate shaft 113 to the mounting seat 127. Of course, this fixing method is only schematic; at the same time, the second axial end 1132 of the intermediate shaft 113 is mounted on a fixing plate 210 fixed to the main housing 120, so that the intermediate shaft 113 is kept fixed relative to the main housing 120, and the polarization transmitted to the intermediate shaft 113 by the second gear 114 and / or the third gear 115 is effectively absorbed by setting the fixing plate 210.

[0110] In a specific embodiment, Figure 7-9 As shown, a hole may be provided at a substantially middle position of the fixing plate 210, and the second shaft end 1132 of the intermediate shaft 113 is inserted into the hole and the fixing plate 210 is fixed relative to the intermediate shaft 113 by a tight fit, i.e., an interference fit. In an embodiment not shown, the second shaft end 1132 of the intermediate shaft 113 is fixed to the fixing plate 210 by a screw. In this case, a threaded hole may be provided on the second shaft end face, and a corresponding threaded hole may be provided on the fixing plate 210. The screw is tightened through the corresponding threaded hole provided in the second shaft end face and in the fixing plate 210, thereby fixing the intermediate shaft 113 and the fixing plate 210 together. Of course, the fixing of the intermediate shaft 113 relative to the fixing plate 210 is not limited thereto, and any method for fixing the intermediate shaft relative to the fixing plate is feasible, such as by riveting, even welding, etc.

[0111] like Figure 8-9 As shown, in order to fix the fixing plate 210 relative to the main housing 120, the fixing plate 210 may be provided with a first fixing end 211 and a second fixing end 212 for fixing to the main housing 120. In a specific embodiment, as shown in FIG. Figure 8As shown, the first fixed end 211 of the fixing plate 210 can be fixed to the first column 125 extending upward from the bottom 128 of the main housing 120 inside the main housing 120. The first column 125 is, for example, molded integrally with the bottom 128 of the main housing 120, or can be a separate component firmly fixed to the bottom 128 of the main housing 120. The first fixed end 211 of the fixing plate 210 can be fixed to the first column 125 by a screw 126. For example, a threaded hole can be provided at the first fixed end 211 of the fixing plate 210, and a corresponding threaded hole can be provided on the end surface of the first column 125. Then, the screw is tightened into the corresponding threaded hole provided in the first fixed end 211 of the fixing plate 210 and the end surface of the first column 125, thereby realizing a firm fixation between the first fixed end 211 of the fixing plate 210 and the first column 125. Of course, this fixing method is only schematic, and any other feasible fixing method can be selected to fix the first fixed end of the fixing plate relative to the first column.

[0112] In this embodiment, in a more specific implementation (not shown), similar to the first fixed end 211, the second fixed end 212 of the fixing plate 210 can also be fixed to another column portion extending upward from the bottom 128 of the main housing 120 inside the main housing 120, and the same or different fixing methods can be adopted. It should be noted that the corresponding column portions for fixing the first fixed end 211 and the second fixed end 212 can be set separately from the side wall of the main housing 120, or can be set in contact with the side wall of the main housing 120, and the specific position of the column portion can be set according to needs or available space in the main housing.

[0113] In another more specific embodiment, the second fixing end 212 of the fixing plate 210 may be fixed to the main housing 120 in a different manner than the first fixing end 211. Figure 8-9 As shown, the second fixing end 212 can be fixed to the main housing 120 by form fitting. In this case, a first form fitting feature portion and a second form fitting feature portion with complementary shapes and capable of fitting with each other can be provided on the second fixing end 212 of the fixing plate 210 and the corresponding side wall of the main housing 120, respectively, so that the second fixing end 212 of the fixing plate 210 can be fixed relative to the main housing 120 by the form fitting formed between the first form fitting feature portion and the second form fitting feature portion. Specifically, as Figure 8-9As shown, the second shape-matching feature portion provided in the side wall of the main housing 120 can be implemented as a groove 124 extending at least partially along the side wall and parallel to the rotation axis, and the first shape-matching feature portion provided at the second fixed end 212 of the fixing plate 210 can be a convex portion that can be inserted into the groove 124. Of course, such shape-matching manner is only exemplary, and any other suitable manner is feasible and within the protection scope of the present invention.

[0114] Therefore, in the present invention, the fixing plate 210 for holding the intermediate shaft 113 can make full use of the available space in the main housing 120 without occupying excess space, thereby arranging the fixing plate 210 in a space-saving compact manner and ensuring its holding effect on the intermediate shaft 113.

[0115] like Figure 7 As shown, in order to install the intermediate shaft 113 and the second gear 114 mounted on the intermediate shaft in the main housing 120 with limited space, and especially when the first gear 112 and the larger fourth gear 116 are already installed in place, in order to bypass the larger fourth gear 116 installed above the first gear 112 from top to bottom, in one embodiment, the intermediate shaft 113 and the second gear 114 can be preassembled. To this end, as shown in FIG. Fig.10 As shown in FIG. 1 , a constricted portion 1133 may be provided on the intermediate shaft 113, so that the intermediate shaft 113 includes the constricted portion 1133 and a non-constricted portion, wherein the non-constricted portion is the portion of the intermediate shaft 113 other than the constricted portion 1133, and a reduced diameter portion 1141 is provided in the center hole of the second gear 114. In this case, during the installation of the intermediate shaft 113 and the second gear 114, the second gear 114 will have a first position and a second position relative to the intermediate shaft 113, wherein in the first position, the reduced diameter portion 1141 of the center hole of the second gear 114 is positioned opposite to the non-constricted portion of the intermediate shaft 113, so that the second gear 114 is tightly fitted on the intermediate shaft 113, and in the second position (such as FIG. 1 ), the reduced diameter portion 1141 of the center hole of the second gear 114 is positioned opposite to the non-constricted portion of the intermediate shaft 113, so that the second gear 114 is tightly fitted on the intermediate shaft 113. Fig.10 In the position shown in FIG. 1 , the reduced diameter portion 1141 of the center hole of the second gear 114 is opposite to the contracted portion 1133 of the intermediate shaft 113, so that the second gear 114 can rotate relative to the intermediate shaft 113. To this end, the diameter of the reduced diameter portion 1141 of the center hole of the second gear 114 can be: smaller than or equal to the diameter of the non-contracted portion of the intermediate shaft 113, that is, the non-contracted portion of the intermediate shaft 113 is allowed to form a tight fit or interference fit with the reduced diameter portion 1141 of the center hole of the second gear 114; or greater than or equal to the diameter of the contracted portion 1133 of the intermediate shaft 113, that is, the contracted portion 1133 of the intermediate shaft 113 is allowed to form a clearance fit with the reduced diameter portion 1141 of the center hole of the second gear 114.

[0116] Still Figure 7 As shown, in a more specific embodiment, the second gear 114 and the third gear 115 mounted on the intermediate shaft 113 can be two gears of an integrated step pulley. In this case, similarly, in order to install the intermediate shaft 113 and the step pulley mounted on the intermediate shaft 113 in the main housing 120 with limited space, and especially when the first gear 112 and the larger fourth gear 116 have been installed in place, in order to bypass the larger fourth gear 116 installed above the first gear 112 from top to bottom, the intermediate shaft 113 and the step pulley can be preassembled. Similarly, a constricted neck 1133 can be provided on the intermediate shaft 113, so that the intermediate shaft 113 includes a constricted neck 1133 and a non-constricted neck, i.e., the portion of the intermediate shaft 113 other than the constricted neck 1133, and a diameter reduction portion 1141 is provided in the center hole of the step pulley. In this case, during the process of installing the intermediate shaft 113 and the step pulley, the step pulley will have a first position and a second position relative to the intermediate shaft 113, wherein in the first position, the reduced diameter portion 1141 of the center hole of the step pulley is opposite to the non-shrinking portion of the intermediate shaft 113, so that the step pulley is tightly fitted on the intermediate shaft 113, and in the second position, the reduced diameter portion 1141 of the center hole of the step pulley is opposite to the shrinking portion of the intermediate shaft 113, so that the step pulley can rotate relative to the intermediate shaft 113. To this end, the diameter of the reduced diameter portion 1141 of the center hole of the step pulley can be: less than or equal to the diameter of the non-shrinking portion of the intermediate shaft 113, that is, the non-shrinking portion of the intermediate shaft 113 is allowed to form a tight fit or interference fit with the reduced diameter portion 1141 of the center hole of the step pulley; greater than or equal to the diameter of the shrinking portion 1133 of the intermediate shaft 113, that is, the shrinking portion 1133 of the intermediate shaft 113 is allowed to form a clearance fit with the reduced diameter portion 1141 of the center hole of the step pulley.

[0117] In either case, the constricted portion of the intermediate shaft 113 cannot be arranged at a position close to the first axial end 1131 in the mounting seat 127 for inserting into the bottom 128 of the main housing 120, and the non-constricted portion of the intermediate shaft 113 should be arranged at least at the first axial end 1131 of the intermediate shaft 113, so that it can be ensured that only a small section near the first axial end 1131 of the intermediate shaft 113 is inserted into the diameter reduction portion 1141 in the second gear 114 or the step pulley to form a preassembled component, thereby allowing the preassembled component to obliquely bypass the fourth gear 116 and reach the installation position of the second gear 114 or the step pulley at an orientation angled relative to the rotation axis X, and then, by pressing the intermediate shaft 113 downward, the first axial end 1131 of the intermediate shaft 113 is inserted into the mounting seat 127 and installed in place therein, at which time the constricted portion 1133 of the intermediate shaft 113 is positioned relative to the diameter reduction portion 1141 of the center hole of the second gear 114 or the step pulley. In this way, it is possible to ensure that full utilization of the limited space inside the main housing 120 is achieved without having to make the main housing 120 larger, thereby allowing for a very compact overall structure.

[0118] In the case where the second gear 114 and the third gear 115 constitute a step pulley, in one embodiment (not shown), the reduced diameter portion of the step pulley can also be arranged in the center hole of the third gear 115 located above the second gear 114 according to actual conditions. It should be understood that as long as it can be ensured that the preassembled part formed by the second gear 114 or the step pulley can bypass the fourth gear 116 to reach the installation position, the specific positions of the reduced diameter portion and the neck portion are not precisely defined.

[0119] It should also be noted that, in either case, the second position is the working position of the transmission assembly, and in this case, the intermediate shaft 113 may not rotate.

[0120] like Fig.11 As shown, in another different embodiment, in order to conveniently install the intermediate shaft 113, the second gear 114 and the third gear 115 into the limited space in the main housing 120, an opening 129 may be provided in the side wall of the main housing 120 at a position corresponding to the installation level of the second gear 114 and the third gear 115, and the size of the opening 129 is set to at least allow the second gear 114 and the third gear 115 to enter the main housing 120 through the opening 129 and be installed in place; at the same time, in this case, the microfluid pump 100 should also include a cover 230 for installation at the opening 129 to cover the opening 129. In a more specific embodiment, and as Fig.11As shown, the opening 129 can be configured as a rectangular window; however, it should be understood that any suitable shape of the opening is feasible as long as its size allows the second gear and the third gear to pass through the opening into the main housing and be installed in place.

[0121] In addition, if Fig.11 As shown, when the cross-section of the main housing 120 perpendicular to the rotation axis X is in the form of a rectangle (the rectangle can be understood here as a rectangle with rounded corners), the opening 129 can be set through at least a portion of the two adjacent side walls 1201 and 1202 of the main housing 120 at the same time, that is, the opening 129 is set at a corner of the main housing 120. Compared with the case where the opening 129 is set in a single side wall of the main housing 120, this allows for a larger open space to more conveniently place the intermediate shaft 113, the second gear 114 and the third gear 115 in place.

[0122] It should be noted that this embodiment is applicable to the case where the second gear 114 and the third gear 115 are separate gears, and is also applicable to the case where the second gear 114 and the third gear 115 form an integral step pulley. In either case, during assembly, the second gear 114 and the third gear 115, which are set as an integral optional device, can first be placed in the installation position in the main housing 120 through the opening 129, and then the intermediate shaft 113 is passed from top to bottom through the center holes of the second gear 114 and the third gear 115, and finally installed in place in the mounting seat 127 of the bottom 128 of the main housing 120 via its first shaft end 1131. Therefore, the setting of the opening 129 allows for easy maintenance and replacement of the intermediate shaft 113, the second gear 114 and the third gear 115. In particular, the setting of the opening 129 allows lubricating oil to be applied to the transmission assembly through it to ensure smooth operation of the transmission assembly. In addition, the heat inside the main housing 120 can be dissipated through the opening 129; in this case, the cover 230 for covering the opening 129 can be formed of a material that can dissipate heat or be constructed as a structure that allows heat dissipation. In addition, the installation and operation of the internal components of the main housing 120 can be observed through the opening 129, so as to monitor the operation of the microfluid pump 100.

[0123] Still in this embodiment, the fixing plate 210 for holding the intermediate shaft is allowed to be integrally formed with the main housing 120 without hindering the installation of the fourth gear 116 and other components because the second gear 114 and the third gear 115 no longer need to be installed from above in this embodiment.

[0124] And still in this embodiment, if Fig.12As shown, the fixing plate for holding the intermediate shaft can be replaced by a support beam 220, that is, in this case, the first axial end of the intermediate shaft 113 is mounted to the mounting seat 127 of the bottom 128 of the main housing 120 (as shown in FIG. Figure 7 As shown in FIG. 1 , the mounting seat 127 is integrally formed with the bottom 128 of the housing 120 or is separately formed and fixed thereto, and the second axial end of the intermediate shaft 113 is mounted to the support beam 220 connected to the main housing 120. In this case, the support beam 220 is integrally formed with the main housing 120, which allows saving manufacturing and installation costs. In addition, as shown in FIG. Fig.12 As shown, the support beam may be V-shaped, including a top end 223 and a first branch 221 and a second branch 222 extending from the top end 223 in a V-shape, and the second axial end of the intermediate shaft 113 is mounted to the top end 223 of the support beam 220, and the first branch 221 and the second branch 222 are connected to the side wall of the main housing. The V-shaped support beam 220 allows the intermediate shaft 113 to be retained in a manner that does not hinder the installation of other components in the main housing 120, and ensures the concentricity of the intermediate shaft 113 with the second gear 114 and the third gear 115 in a more compact manner. The connection between the intermediate shaft 113 and the top end of the V-shaped support beam 220 can be performed in the manner described above, including tight fit, threaded fixing, welding, etc. The top angle of the V-shaped support beam 220 is, for example, in the range of 60° to 180°.

[0125] Of course, the V-shaped support beam 220 can also be formed separately from the main housing 120, and fixed to the corresponding column portion extending upward from the bottom of the housing 120 as described above through its first branch 221 and second branch 222, or fixed to the main housing 120 by its first branch 221 and second branch 222 forming a shape fit with the side wall of the housing, similar to the above description of the fixing plate 210. And further, the V-shaped support beam 220 itself can also be formed by a separate first branch and a second branch.

[0126] like Figure 2-4 As shown, the microfluid pump according to the present invention may further include an axial support assembly 170 for supporting the crankshaft 190 along the direction of the motor rotation axis X, and the axial support assembly 170 may also be at least partially disposed in the accommodation space of the main housing 120, and in order to provide axial support for the crankshaft 190 and effectively transmit the axial pressure exerted on the crankshaft 190 to the main housing 120, the axial support assembly 170 may be fixed relative to the main housing 120. In a specific embodiment, as Figure 2-3As shown, the axial support assembly 170 includes a support body 171 and a support protrusion 172 protruding from the support body 171 toward the diaphragm body mounting seat 130. The support body 171 is fixed relative to the main housing 120 and the bent rod 190 is supported on the support protrusion 172. The support protrusion 172 is, for example, spherical or conical, and can be made of steel, ceramic or cemented carbide. It should be noted that the spherical or conical portion of the support protrusion 172 is used to support the bent rod 190, while the shape of the portion of the support protrusion 172 connected to the support body 171 is not limited and can be any shape that can achieve connection with the support body 171. Optionally, as Figure 2 As shown, the support body 171 is a support rod, and the support protrusion 172 includes a support ball, such as a steel ball, thereby ensuring the mechanical strength of the support ball so that it can effectively withstand and transmit axial pressure, which is beneficial to the robust operation of the entire microfluid pump.

[0127] In a more specific embodiment, in order to easily install the axial support assembly 170 in the microfluid pump 100, thereby saving installation time and cost, the support body 171 and the support protrusion 172 can be configured to form a subassembly that is connected to each other, so as to facilitate the installation of the axial support assembly 170 in the microfluid pump 100. It should be noted that, here, "connected to each other" does not only refer to rigid connection, and may include connection achieved in a loose fit manner and a tight fit manner.

[0128] In one embodiment, the support protrusion 172 and the support body 171 are connected with each other in a loose fit. In a specific embodiment, a recessed portion, such as a non-through recessed portion, can be provided in the support body 171, and the support protrusion 172 and the support body 171 are connected with each other in a loose fit by a paste lubricating oil provided in the recessed portion. By forming a loose fit between the support protrusion 172 and the support body 171, it can be ensured that the support protrusion 172 has a certain degree of rotational freedom relative to the support body 171, so that when the support protrusion 172 plays an axial supporting role on the curved rod 190, the support protrusion 172 not only generates sliding friction relative to the curved rod 190, but also generates rolling friction relative to the curved rod 190, thereby ensuring that the axial pressure from the curved rod 190 is absorbed in a more effective and smoother way, which will reduce or slow down the wear of the support protrusion 172 and the support body 171, thereby helping to extend its service life cycle. Moreover, this is also conducive to a smoother and more stable operation of the entire microfluid pump 100.

[0129] In another embodiment, the support protrusion 172 can be tightly fitted to the support body 171, which makes it easier to install the subassembly formed by the support protrusion 172 and the support body 171 in the microfluid pump 100. In this case, in one embodiment, the support protrusion 172 can be tightly fitted to the support body 171 through shape fit; for example, a recessed portion can be provided in the support body 171, and a mounting portion corresponding to the recessed portion can be provided in the support protrusion 172, and the size of the mounting portion is set to be slightly larger than the size of the recessed portion, so that the mounting portion can be directly tightly fitted in the recessed portion without using other auxiliary mounting devices. Obviously, this method is simple and easy. It should be noted that the shape fit described here is only schematic, and other feasible shape fit methods are also within the scope of the present disclosure. In another variation, the support protrusion 172 can be welded or bonded to the support body 171, which can ensure a firm connection between the support protrusion and the support body. In yet another variation, the support protrusion 172 may be fixed to the support body 171 via a fixing member. In this case, the support protrusion 172 is fixed to the support body 171, for example, via a stud or pin integrally formed therewith. More specifically, the support protrusion 172 may be the ball head portion of a ball stud, and the stud is the bolt portion of the ball stud, so that the support protrusion 172 may be screwed into the threaded hole of the support body 171 via the bolt portion; in the case of a pin, the support protrusion 172 may be tightly fitted into the hole formed in the support body 171 via the pin.

[0130] According to a specific embodiment, in order to arrange the support body 171 and the support protrusion 172 in the microfluid pump in a compact and space-saving manner, the curved rod 190 may include a hollow portion 195 so that the support body 171 can be arranged in the hollow portion 195 on a plane transverse to the longitudinal direction. More specifically, as Figure 5-6 As shown, the curved rod 190 may include a main panel 193 and a protrusion 191 extending downward from the bottom of the main panel. The protrusion 191 is used to receive at least a portion of the swing shaft 182 as described above to establish a mechanical and power connection between the swing shaft 182 and the curved rod 190. The hollow portion 195 may be arranged between the lower surface of the main panel 193 and the top of the protrusion 191, that is, the protrusion 191 may extend downward from the hollow portion 195, and the support body 171 is inserted into the hollow portion 195 above the protrusion 191 and fixed to the main shell 120 at its two ends, for example.

[0131] Still in this embodiment, the bent rod 190 may also be provided with a bent rod recess 194 (such as Figure 3 and 5As shown in FIG. 1 , for example, the curved lever recess 194 is located above the hollow portion 195 and is disposed at the central portion of the main panel 193 of the curved lever 190. More specifically, the curved lever 190 may include, for example, an insert 196 at its central portion, the insert 196 being optionally embedded in the main panel 193 of the curved lever 190 by overmolding, and the curved lever recess 194 being disposed on the insert 196. Such an insert is configured as a force-bearing insert, which can protect the curved lever and further ensure stable operation of the curved lever. According to a specific embodiment, as Figure 3a As shown, it is Figure 3 In the partial view, the support protrusion 172 is arranged at the intersection C of the motor rotation axis X and the central axis O of the bent rod 190, and a point contact is formed between the support protrusion 172 and the bent rod 190, and the contact point coincides with the intersection C. As a result, such an axial support assembly 170 can effectively transfer the axial pressure from the bent rod 190 to the main housing 120. At the same time, this ensures that the setting of the support protrusion 172 will not affect the normal movement amplitude of the bent rod 190 during operation, and thus ensures the normal movement amplitude of the diaphragm body mounting seat 130 and the diaphragm body 160 carried by it, and ensures the operating efficiency of the microfluid pump 100. In an embodiment in which the support protrusion 172 is a support ball, the curvature radius of the support ball is set to be smaller than the curvature radius of the bent rod recess 194. As a result, a point contact as described above can be formed between the support ball and the bent rod recess.

[0132] In addition, still in this embodiment, in the case where the support body 171 is a support rod, the support rod can be inserted into the hollow portion 195 as described above, and can be fixed to two opposite walls of the main housing 120 by its two ends by any known conventional fixing method, such as by using fixings such as screws, rivets, or by gluing, or by form fitting. In a more specific embodiment (not shown), the two ends of the support rod can be fixed in grooves provided for this purpose on two opposite walls of the main housing 120, and can be fixed in the grooves, for example, by form fitting. In a more specific embodiment not shown, the support rod is fixed at the second longitudinal end 123 of the main housing 120 and is installed between the main housing 120 and the diaphragm body mounting seat 130. In this case, at the second longitudinal end 123 of the main housing 120, a first groove is provided on each of the two opposite walls of the main housing 120; at the same time, at the longitudinal end of the diaphragm mounting seat 130 connected to the main housing 120, a second groove is provided on each of the two opposite walls of the diaphragm mounting seat 130, and each first groove is aligned with a second groove, and the first groove and the second groove are formed to cooperate to accommodate one end of the support rod. More specifically, the first groove and the second groove simultaneously form a shape fit with the end of the support rod, such as an interference fit, so that the mutual connection and fixation between the main housing 120 and the diaphragm body mounting seat 130 are simultaneously achieved through this shape fit, which further simplifies the installation between the main housing 120 and the diaphragm body mounting seat 130, avoids the use of additional components and tools to achieve such installation, and enables the installation of the axial support assembly to be achieved in a very compact structure, thereby improving cost-effectiveness.

[0133] It should be understood that, according to actual needs, the micro fluid pump 100 may further include, for example, a valve seat 140, an upper cover 150 or other components, and for example, referring to Figure 1 and Figure 2 As shown, the upper cover 150 , the valve seat 140 , the diaphragm body mounting seat 130 , the main housing 120 and the motor 110 are sealed and installed in sequence from top to bottom, for example.

[0134] According to another aspect of the present disclosure, a pressure fluid application device is provided, which includes the micro fluid pump as described above and can have the functions and advantages as described above.

[0135] In some embodiments, the device is a coffee machine. The coffee machine may be, for example, an Italian coffee machine, or an American coffee machine, or other types of coffee machines. The embodiments of the present disclosure are not limited by the specific type of the coffee machine.

[0136] In some embodiments, the coffee machine is an espresso machine. By using the aforementioned microfluid pump of the present application, the coffee machine can stably and continuously output fluid at a pressure of about 10 bar, thereby producing pure espresso, so that the espresso machine has good performance.

[0137] In some embodiments, the device is a tooth washer. For example, the fluid pressure application device can be a household tooth washer, or it can also be a medical tooth washer. The embodiments of the present disclosure are not limited by the application field of the tooth washer.

[0138] The above text describes in detail the exemplary implementation of the microfluid pump proposed in the present invention and the pressure fluid application equipment including such a microfluid pump with reference to the preferred embodiments. However, it can be understood by those skilled in the art that, without departing from the concept of the present invention, various modifications and variations can be made to the above-mentioned specific embodiments, and various technical features and structures proposed in the present invention can be combined in various ways without exceeding the scope of protection of the present invention.

[0139] The scope of the present disclosure is not limited by the above-described embodiments but by the appended claims and their equivalents.

Claims

1. A microfluid pump, wherein: The microfluid pump (100) comprises: A motor (110) having a motor shaft (111) extending in the direction of an axis (X); A main housing (120) connected to the motor (110) and defining an accommodation space; a rotating wheel (180) which receives the torque transmitted by the motor (110) to rotate and on which an eccentric swing shaft (182) is arranged; A diaphragm body mounting seat (130) connected to the main housing (120), wherein a diaphragm body (160) having a plurality of diaphragm units (161) is disposed on the diaphragm body mounting seat (130); A bent rod (190), a first end of which is connected to the swing shaft (182), and a second end opposite to the first end is connected to the diaphragm body (160) to drive the diaphragm unit (161) to reciprocate compression and suction movements; A transmission assembly, comprising a first gear (112) arranged on the motor shaft (111), an intermediate shaft (113) extending parallel to the axis (X), a second gear (114) arranged on the intermediate shaft (113), a third gear (115) arranged on the intermediate shaft (113) and rotating integrally with the second gear (114), and a fourth gear (116) rotating integrally with the rotating wheel (180); The first shaft end (1131) of the intermediate shaft (113) is mounted on a mounting seat (127) of the bottom (128) of the main housing (120), and the second shaft end (1132) of the intermediate shaft (113) is mounted on a support beam (220) or a fixing plate (210) connected to the main housing (120); An opening (129) is provided in the side wall of the main housing (120) at a position corresponding to the installation level of the second gear (114) and the third gear (115), and the size of the opening (129) is set to at least allow the second gear (114), the intermediate shaft (113) and the third gear (115) to enter the accommodation space in the main housing (120) through the opening (129) and be installed in place. The microfluid pump (100) further comprises a cover (230), wherein the cover (230) is mounted to the opening (129).

2. The microfluid pump according to claim 1, characterized in that: The support beam (220) and the main housing (120) are integrally formed.

3. The microfluid pump according to claim 1 or 2, characterized in that: The support beam (220) includes a top end (223) and a first branch (221) and a second branch (222) extending from the top end (223) in a V-shape, the second shaft end (1132) of the intermediate shaft (113) is mounted to the top end (223) of the support beam (220), and the first branch (221) and the second branch (222) are connected to the side wall of the main shell (120).

4. The microfluid pump according to any one of claims 1 or 2, characterized in that: The opening (129) is a rectangular window.

5. The microfluid pump according to any one of claims 1 or 2, characterized in that: The main shell (120) is in the shape of a rectangular circle in a cross section perpendicular to the axis (X), and the opening (129) is arranged to pass through at least a portion of two adjacent side walls of the main shell (120) at the same time.

6. The microfluid pump according to claim 1 or 2, characterized in that: The mounting seat (127) and the bottom (128) of the main housing (120) are integrally formed.

7. A pressure fluid application device, comprising the micro fluid pump (100) according to any one of claims 1 to 6.

8. The device of claim 7, wherein: The device is a coffee machine.

9. The device of claim 8, wherein: The coffee machine is an espresso machine.

10. The device of claim 7, wherein: The device is a dental scaler.

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