Electric pump for easy assembly and maintenance

Abstract

The present application relates to an electric pump that is easy to assemble and maintain. An electric pump (10, 110) comprises: a pump body (11, 111), a mechanical section (12) and an electromechanical section (17) inside the pump body, the mechanical section including a suction port (13) and a delivery port (42, 142) and containing one or more impellers (14), the impellers and diffusers (15) being arranged alternately and keyed to a drive shaft (16), the electromechanical section including an electric motor (18) for driving the shaft (16); and a base (19, 119), two manifolds (20, 21, 120, 121) inside the base, a first delivery manifold (20, 120) connected to the delivery port (42, 142) and a second suction manifold (21, 121) connected to the suction port (13). An electric pump (10, 110) includes one or more means for detachable coupling between a pump body (11, 111) and a base (19, 119), the means being actuatable from a single point (23, 123) of the electric pump.

Description

[0001] The invention relates to an electric pump which is easy to assemble and maintain.

[0002] An electric pump is a device used to move a liquid, usually water, by drawing the liquid from a first area through a suction conduit and delivering the liquid to a second area through a delivery conduit.

[0003] The electric pump comprises a pump body, inside which there are:

[0004] a mechanical section comprising a suction port and a delivery port and containing one or more impellers interleaved with diffusers, keyed to a drive shaft adapted to rotate the impellers for moving the liquid,

[0005] An electromechanical section comprising an electric motor for driving the movement of the shaft.

[0006] Some electric pumps are of the vertical type (ie they have a vertical configuration for use and a vertical axis of extension), with the mechanical section being in the lower part of the electric pump and the electromechanical section being in the upper part above the mechanical section.

[0007] Some models of vertical electric pumps include a base footing inside which are two manifolds, a delivery manifold connected to the delivery port and a suction manifold connected to the suction port.

[0008] Typically, the pump body is stably coupled to the base by means of a plurality of mechanical fixing means (eg screws, bolts or pins).

[0009] This background art has some disadvantages.

[0010] Usually, in order to be able to assemble the electric pump, the pump body needs to be perfectly placed on the base and then the mechanical fixing means have to be applied one by one.

[0011] Likewise, in order to remove the pump body from the base during maintenance or for other reasons, it is necessary to remove all the mechanical fixing means one by one and only then is it possible to separate the pump body from the base.

[0012] This results in lengthy and awkward assembly / disassembly operations, and has an impact on assembly time / maintenance time of the electric pump.

[0013] Furthermore, in order to be able to couple the pump body to the base, it may be necessary to have and use a number of different tools in order to remove the various mechanical fasteners.

[0014] Besides requiring the installation technician / user to conveniently have such a variety of tools at hand, this makes the assembly / disassembly of the electric pump rather complicated.

[0015] It is an object of the present invention to provide an electric pump which improves the background art in one or more of the above-mentioned aspects.

[0016] Within this aim, an object of the present invention is to provide an electric pump that allows an easier and faster association / disassociation of the pump body and the base.

[0017] Another object of the present invention is to provide an electric pump that allows faster and easier assembly / disassembly of the electric pump relative to similar electric pumps of known type, thus offering an improvement in terms of speed and ease of maintenance.

[0018] Another object of the present invention is to provide an electric pump in which, during assembly / maintenance, no mechanical fixing means between the pump body and the base need to be applied / removed separately.

[0019] Another object of the present invention is to provide an electric pump that does not require the use of multiple tools to secure the pump body to a base or to remove the pump body from said base.

[0020] A further object of the present invention is to overcome the disadvantages of the background art in a manner that can replace any existing solutions.

[0021] Another object of the present invention is to provide an electric pump that is highly reliable, relatively easy to set up and has a competitive cost.

[0022] This object and these and other aims, which will become more apparent hereinafter, are achieved by an electric pump comprising:

[0023] - The pump body, inside which there are:

[0024] - a mechanical section comprising a suction port and a delivery port and containing one or more impellers alternating with diffusers, keyed to the drive shaft,

[0025] - an electromechanical section comprising an electric motor for the movement of said drive shaft; and

[0026] - a base inside which there are two manifolds, a first delivery manifold connected to the delivery port and a second suction manifold connected to the suction port,

[0027] The electric pump is characterized in that it comprises one or more means for detachable coupling between the pump body and the base, the one or more means being actuatable from a single point of the electric pump.

[0028] Further characteristics and advantages of the invention will become more apparent from the description of some preferred, but not exclusive, embodiments of the electric pump according to the invention, shown by way of non-limiting examples in the accompanying drawings, in which:

[0029] Figure 1 is a perspective view of an electric pump according to a first embodiment of the present invention;

[0030] Figure 2a and Figure 2b yes Figure 1 Two different views of a portion of an electric pump;

[0031] Figure 3 yes Figure 1 Exploded view of the electric pump;

[0032] Figure 4 yes Figure 1 A view of the electric pump in a first configuration;

[0033] Figure 4a yes Figure 4 A cross-sectional view of the electric pump shown in FIG;

[0034] Figure 5 yes Figure 1 A view of the electric pump in a second configuration;

[0035] Figure 5a yes Figure 5 A cross-sectional view of the electric pump shown in FIG;

[0036] Figure 6 is an exploded view of an electric pump in a first configuration according to a second embodiment of the present invention;

[0037] Figure 7 yes Figure 6 A cross-sectional view of the electric pump in a second configuration;

[0038] Figure 8 yes Figure 6 an enlarged-scale view of a first detail of the electric pump;

[0039] Figure 9 yes Figure 6 An enlarged scale sectional view of a portion of the electric pump in a first operating configuration;

[0040] Figure 10is a detailed view of the interior of an electric pump according to the present invention in a first configuration;

[0041] Figure 11 is a detailed view of the interior of an electric pump according to the present invention in a second configuration;

[0042] Figure 12 is a cross-sectional view of details of an electric pump in a second embodiment according to the present invention.

[0043] Referring to the drawings, in a first embodiment, an electric pump according to the present invention is generally indicated by the reference numeral 10 .

[0044] The electric pump 10 includes a pump body 11, inside which there are:

[0045] a mechanical section 12 comprising a suction port 13 and a delivery port 42 and containing one or more impellers 14 alternately arranged with diffusers 15 and keyed to a drive shaft 16,

[0046] An electromechanical section 17 comprising an electric motor 18 for driving the movement of the shaft 16 .

[0047] The electric pump 10 is vertical and includes a base 19 below the pump body 11. Inside the base 19 there are two manifolds:

[0048] - a delivery manifold 20 connected to the delivery port 42,

[0049] A suction manifold 21 connected to the suction port 13 .

[0050] The electric pump 10 is vertical.

[0051] Manifolds 20 and 21 are coplanar, parallel and of the type described in Italian patent application 10202000001468 in the name of the same applicant.

[0052] A special feature of the electric pump 10 is that it comprises a plurality of means for detachable coupling between the pump body 11 and the base 19 , which means can be actuated from a single point 23 of the electric pump 10 .

[0053] The base 19 has a generally tray-shaped body 24 made of plastic material, wherein the manifolds 20 and 21 pass through the body 24 parallel to a base 26 of the generally tray-shaped body 24 by passing through two opposing first side walls 27a, 27b.

[0054] The pump body 11 is provided at the lower end of the mechanical section 12 with a tray portion 25 made of plastic material, which tray portion 25 closes the generally tray-shaped body 24 of the base 19 .

[0055] On top of manifolds 20 and 21, base 19 includes two rotatable rods:

[0056] - a first rotatable lever 28a,

[0057] - A second rotatable lever 28b.

[0058] The cross-section of the rotatable rod 28a, 28b is:

[0059] - polygons, such as hexagons and / or squares,

[0060] - and / or oval,

[0061] And the rotatable rods 28 a , 28 b extend between two second side walls 29 a , 29 b that are perpendicular to the first side walls 27 a , 27 b of the generally tray-shaped body 24 of the base 19 .

[0062] Specifically, at least the first rotatable lever 28a has a portion 39 that protrudes from the body 24 of the base 19, and this portion 39 can be accessed for rotation from the point 23 of the electric pump 10 as described above.

[0063] The second rotatable lever 28 b also has a portion, not shown in the drawings, protruding from the main body 24 of the base 19 , which is covered by a cap 70 .

[0064] The cap 70 is arranged on the same second side wall 29 a as the point 23 .

[0065] In case of failure and / or emergency, the cap 70 can be removed: in this way, disconnection between the pump body 11 and the base 19 can be achieved by actuating only the second rotatable lever 28b or by actuating both rotatable levers 28a and 28b simultaneously.

[0066] In the base 19, elements for engaging with the tray portion 25 are keyed to each of the rotatable rods 28a and 28b, respectively:

[0067] - two first engagement elements 22a' and 22a'' on the first rotatable lever 28a

[0068] - Two second engagement elements 22b' and 22b" located on the second rotatable lever 28b.

[0069] In the use configuration of the electric pump 10 , each engagement element 22 a ′, 22 a ″, 22 b ′, 22 b ″ engages with a corresponding rod 31 a , 31 b of the tray portion 25 .

[0070] Specifically:

[0071] - the first engagement elements 22a' and 22a" engage with the first rod 31a of the tray part 25,

[0072] The second engagement elements 22 b ′ and 22 b ″ engage with the second rod 31 b of the tray part 25 .

[0073] The rods 31 a , 31 b of the tray portion 25 are made of metal, are at least partially embedded in the plastic material constituting the tray portion 25 , and extend on the surface of the tray portion 25 facing the base 19 .

[0074] Preferably, the bars 31a, 31b of the tray part 25 are embedded in the plastic material of the tray part 25, except in the areas for engagement with the respective engagement elements 22a', 22a", 22b", 22b".

[0075] In this way, significant structural rigidity is provided to the tray portion and the risk of any cracks forming is reduced.

[0076] Each of the first engagement elements 22a', 22a" is coplanar with a corresponding second engagement element 22b', 22b".

[0077] Furthermore, each of the first engagement elements 22 a ′, 22 a ″ is mechanically connected to a respective second engagement element 22 b ′, 22 b ″ via a linkage element 30 .

[0078] The linkage element 30 allows the rotational movement imparted to the first rotatable lever 28a to be transmitted to the second rotatable lever 28b and coordinates and synchronizes the movement of all the engagement elements 22a', 22a", 22b', 22b".

[0079] In particular, each engagement element 22a', 22a", 22b', 22b" comprises a plate 32 that is keyed to the respective rotatable rod 28a, 28b at right angles to the rotatable rod 28a, 28b.

[0080] The plate 32 has a rounded edge 33 ; furthermore, an arcuate tab 34 extends from said plate 32 , the arcuate tab having an extension that is substantially parallel to the extension of the rounded edge 33 .

[0081] The protrusion 34 generally extends from one end of the circular edge 33 .

[0082] Openings 35 for the sliding of the respective rods 31 a , 31 b of the tray portion 25 exist between the circular edge 33 of the plate 32 and the projection 34 .

[0083] Depending on the rotation of the engagement elements 22a ′, 22a ″, 22b ′, 22b ″, the sliding of the rods 31a , 31b of the tray portion 25 results in engagement or disengagement between the base 19 and the tray portion 25 .

[0084] Figure 10 The configuration of two corresponding engagement elements 22 a ′ and 22 b ′ and the linkage element 30 connecting the engagement elements 22 a ′ and 22 b ′ is shown in a configuration in which the tray portion 25 is disengaged from the base 19 .

[0085] Figure 11 The configuration of two corresponding engagement elements 22 a ′ and 22 b ′ and a linkage element 30 connecting the engagement elements 22 a ′ and 22 b ′ is shown in a configuration in which the tray portion 25 is engaged with the base 19 .

[0086] At the end of the rounded edge 33 of the plate 32 opposite the end from which the projection 34 extends, there is a shaped portion 36 which at least partially follows the contour of the bars 31 a , 31 b of the tray portion 25 .

[0087] In the configuration in which the pump body 11 is detached from the base 19 , the shaped portion 36 is adapted for stably resting the tray portion 25 on the base 19 .

[0088] In the present description, the expression "stable rest" is understood to mean a rest that requires an external force to allow relative movement of the tray 25 with respect to the base 19, due to the sliding of the rods 31a, 31b of the tray part 25 in the openings 35 of the coupling elements 22a', 22a", 22b', 22b".

[0089] These shaped portions 36 are also suitable for guiding and facilitating the assembly of the electric pump 10 .

[0090] In fact, in order to be able to combine the pump body 11 with the base 19, the user must simply place the pump body 11 on the base 19 so that the rods 31a, 31b of the tray portion 25 rest on the corresponding shaped portions 36 of the coupling elements 22a', 22a", 22b', 22b", as shown in FIG. Figure 10 shown in a disengaged configuration.

[0091] The means for detachable connection between the pump body 11 and the base 19 is composed of the following items:

[0092] - a first rotatable lever 28a of the base 19,

[0093] - a second rotatable lever 28b of the base 19,

[0094] - first engagement elements 22a' and 22a'' on the first rotatable lever 28a

[0095] - second engagement elements 22b' and 22b'' on the second rotatable lever 28b

[0096] - the rods 31 a , 31 b of the tray portion 25 of the pump body 11 .

[0097] The electric pump 10 comprises a lever 37 for actuating the means for detachable coupling.

[0098] The operating lever 37 has an end 38 for interacting with the first rotatable lever 28 a of the base 19 , this end 38 being complementarily shaped or complementary to a portion 39 of said first rotatable lever 28 a protruding from the body 24 .

[0099] The operating lever 37 is used only in the steps of combining or separating the pump body 11 and the base 19 .

[0100] The operating lever 37 is connected to and interacts with the protruding portion 39 of the first rotatable lever 28a at point 23 of the electric pump 10, as shown above.

[0101] Once the electric pump 10 is assembled, and during normal operation of the electric pump 10 , the operating lever 37 is removed and separated from the pump.

[0102] If necessary, after the cap 70 is removed, the operating lever 37 is connected to and interacts with the protruding portion of the second rotatable lever 28b.

[0103] If it is necessary to move both rotatable levers 28a and 28b simultaneously, the installation technician / user actuates the first rotatable lever 28a by means of the operating lever 37 and the second rotatable lever 28b by means of a socket wrench known per se, or vice versa.

[0104] The coupling between the pump body 11 and the base 19 is performed in the following manner.

[0105] like Figure 3 、 Figure 4 、 Figure 4a and Figure 10 As shown, the base 19 has the engagement elements 22a', 22a", 22b', 22b" in a disengaged configuration.

[0106] The pump body 11 is arranged on the base 19 so that the rods 31a, 31b of the tray part 25 of the pump body 11 rest on the formed parts 36 of the coupling elements 22a', 22a", 22b', 22b", wherein each of the rods 31a, 31b of the tray part 25 is parallel to the corresponding rotatable rod 28a, 28b.

[0107] The operating lever 37 is coupled to the protruding portion 39 of the first rotatable lever 28a, at point 23 of the electric pump 10, along Figure 3The protruding portion 39 of the first rotatable lever 28 a is tightly connected to the end portion 38 of the operating lever 37 in the direction indicated by the middle arrow 40 .

[0108] Then, the joystick 37 is moved along Figure 4 Rotate in the direction of arrow 41, from Figure 4 Rotate the position shown to Figure 5 Position shown.

[0109] Due to the shape match between the protruding portion 39 of the first rotatable lever 28a and the end 38 of the operating lever 37, a rotation of the operating lever 37 results in a rotation of the first rotatable lever 28a, which in turn results in a rotation of the first engagement elements 22a' and 22a".

[0110] Due to the mechanical connection of each first joint element 22a', 22a" to the corresponding second joint element 22b', 22b" via the linkage element 30, rotation of the first joint elements 22a', 22a" causes a synchronous and coordinated rotation of the second joint elements 22b', 22b".

[0111] The rotational movement of the engaging elements 22a', 22a", 22b', 22b" allows the rods 31a, 31b of the tray portion 25 to move from the shaped portion 36, enter the corresponding opening 35 and slide therein, running along the entire circular edge 33 of the corresponding plate 32, as shown Figure 11 shown.

[0112] exist Figure 11 In the configuration of the coupling elements 22a', 22a", 22b', 22b', 22b' shown, the coupling between the rods 31a, 31b of the tray portion 25 and the coupling elements 22a', 22a", 22b', 22b', 22b' provides a connection between the pump body 11 and the base 19 and a mutual fixation between the pump body 11 and the base 19, as also shown in FIG. Figure 5 and Figure 5a shown.

[0113] During rotation of the engagement elements 22a', 22a", 22b', 22b", the suction port 13 and the delivery port 42 of the pump body 11 are fluidly connected to respective manifolds 21 and 20 of the base 19, each manifold having an inlet 43 which is conveniently arranged to be connected to the respective suction port 13 or delivery port 42.

[0114] Since the assembly of the electric pump 10 has been concluded, the operating lever 37 can now be removed from the point 23 of the electric pump 10 and the electric pump can thus be put into use.

[0115] Therefore, in an opposite manner, the pump body 11 can be separated from the base 19 by performing the above steps in reverse.

[0116] It should be noted that the assembly and disassembly operations of the electric pump 10 are easier and faster than those of other electric pumps of known type.

[0117] It should also be noted that, for this electric pump, the base 19 and the pump body 11 can be engaged or disengaged by actuating all the engagement elements 22 a ′, 22 a ″, 22 b ′, 22 b ″ from a single point 23 .

[0118] Figures 6 to 9 and Figure 12 An electric pump 110 is shown in a second embodiment according to the present invention.

[0119] The electric pump 110 is similar to the previous electric pumps and components of the electric pump 110 corresponding to components of the electric pump of the first embodiment are denoted by like numerals increased by 100.

[0120] Furthermore, compared to the electric pump in the first embodiment described above, the electric pump 110 includes two auxiliary removable fixing elements 150 located between the pump body 111 and the base 119 .

[0121] The auxiliary removable fixation element 150 is constituted by a threaded knob comprising a handle 151 and a stem 155 extending from the handle 151 and being at least partially threaded.

[0122] The stem 155 is provided with a wider, threaded end 157 which:

[0123] - a corresponding first through hole 152 through the tray portion 125,

[0124] and is screwed into a second hole 153 located on the side wall of the generally tray-shaped body 124 of the base 119 , said second hole 153 corresponding to and coaxial with the first hole 152 .

[0125] The first hole 152 has a first portion 160 of reduced cross-section that is tapped when the end 157 of the shank 155 passes therethrough, and a second portion 161 having a wider and larger cross-section than the cross-section of the end 157 of the shank 155 .

[0126] The second portion 161 is close to the second hole 153 .

[0127] The wider end 157 of the stem 155 can slide within the second portion 161 of the first aperture 152 , but the first portion 160 of reduced cross-section prevents the wider end 157 of the stem 155 from sliding and any exit from the first aperture 152 .

[0128] In particular, a spring 154 is present between the handle 151 of each knob 150 and the entrance to the first hole 152, surrounding the stem 155 and adapted for elastic return of the stem 155 so as to retract the end 157 of the knob 150 and retain the end 157 of the knob 150 in the second portion 161 of the first hole 152 once the knob 150 has been unscrewed from the second hole 153.

[0129] In a preferred embodiment of the electric pump 110 , the end 157 of the stem 155 of the knob 150 taps at least the first portion 160 of the hole 152 as it passes, reaches the second portion 161 and screws into a threaded insert 162 present inside the second hole 153 .

[0130] The shape of the end 157 of the stem 155 and the shape of the first portion of the first hole 152 allow the knob 150 to always be integral with the tray portion 125 in both the engagement and disengagement of the pump body 111 from the base 119 .

[0131] After the tray portion 125 is engaged with the base 119 , the tray portion is further secured to the base 119 by a second securing element 150 in a manner similar to that which occurs in the electric pump in its first embodiment.

[0132] In order to be able to disengage the pump body 111 from the base 119 , it is first necessary to unscrew the fixing element 150 so as to remove the fixing element from the base 119 and then disengage the base 119 from the tray portion 125 similarly to what was done for the electric pump in the first embodiment.

[0133] Another feature of the electric pump 110 is that the tray portion 125 has a plurality of legs 156 which extend from a surface of the tray portion facing the base 119 in the use configuration of the electric pump 110 .

[0134] These feet 156 are adapted to allow the pump body 111 to rest stably in an upright position when the pump body 111 is not coupled to the base 119 .

[0135] Another feature of the present invention is that the electric pump 10, 110 includes a sensor (not shown in the figures) which allows the correct fixing of the pump body 11, 111 to the base 19, 119 to be detected before the electric pump 10, 110 is put into operation, for example by a signal displayed on a display of the electric pump (not shown in the figures).

[0136] In practice, it has been found that the invention achieves the intended aim and objects, providing an electric pump that allows easier and faster coupling / decoupling of the pump body and base.

[0137] The present invention provides an electric pump that allows for faster and easier assembly / disassembly of the electric pump compared to similar electric pumps of known type, thereby improving the speed and ease of maintenance.

[0138] Furthermore, the present invention provides an electric pump in which, during assembly / maintenance, there is no need to separately apply / remove mechanical fixing means between the pump body and the base.

[0139] Finally, the present invention provides an electric pump that does not require the use of multiple tools to secure the pump body to the base or to remove the pump body from the base.

[0140] The invention thus conceived is susceptible of numerous modifications and variations, all of which are within the scope of the appended claims; moreover, all the details may be replaced by other technically equivalent elements.

[0141] In practice, the materials used (as long as they are compatible with the specific use), as well as the possible shapes and dimensions, may be any according to requirements and the state of the art.

Claims

1. An electric pump (10, 110), comprising: - a pump body (11, 111), inside which there is: - a mechanical section (12) comprising a suction port (13) and a delivery port (42, 142) and containing one or more impellers (14) arranged alternately with diffusers (15) and keyed to a drive shaft (16), - an electromechanical section (17) comprising an electric motor (18) for the movement of the drive shaft (16); and - a base (19, 119) having two manifolds (20, 21, 120, 121) inside said base (19, 119), a first delivery manifold (20, 120) connected to said delivery port (42, 142) and a second suction manifold (21, 121) connected to said suction port (13), wherein said base (19, 119) has a generally tray-shaped body (24, 124), The electric pump (10, 110) is characterized in that the electric pump (10, 110) comprises one or more means for detachable coupling between the pump body (11, 111) and the base (19, 119), the one or more means being capable of being actuated from a single point (23, 123) of the electric pump (10, 110), - the pump body (11, 111) is provided with a tray portion (25, 125) at the lower end of the mechanical section (12), the tray portion (25, 125) closing the substantially tray-shaped body (24, 124) of the base (19, 119), The device for detachable connection between the pump body (11, 111) and the base (19, 119) is composed of the following items: - a first rotatable lever (28a, 128a) of the base (19, 119), - a second rotatable lever (28b, 128b) of the base (19, 119), - a first engaging element (22a', 22a", 122a', 122a", - a second engaging element (22b', 22b", 122b', 122b", - each corresponding rod (31a, 31b, 131a, 131b) of the tray portion (25, 125) of the pump body (11, 111), The following elements for engaging with the tray portion (25, 125) are keyed to each of the rotatable rods (28a, 28b, 128a, 128b), respectively: - two first engaging elements (22a', 22a", 122a', 122a") on said first rotatable lever (28a, 128a), - two second engagement elements (22b', 22b", 122b', 122b") on said second rotatable lever (28b, 128b), In the use configuration of the electric pump (10, 110), each of the engagement elements (22a', 22a", 22b', 22b", 122a', 122a", 122b', 122b") is engaged with the corresponding rod (31a, 31b, 131a, 131b) of the tray portion (25, 125), respectively: - the first engagement element (22a', 22a", 122a', 122a") engages with a first rod (31a, 131a) of the tray portion (25, 125), - the second engagement element (22b', 22b", 122b', 122b") engages with a second rod (31b, 131b) of the tray portion (25, 125).

2. The electric pump (10, 110) according to claim 1, characterized in that The electric pump is vertical.

3. The electric pump (10, 110) according to claim 1, characterized in that: - the manifold (20, 21, 120, 121) passes through the substantially tray-shaped body (24, 124) parallel to the base (26) of the substantially tray-shaped body (24, 124), passing through two opposing first side walls (27a, 27b, 127a).

4. The electric pump (10, 110) according to claim 3, characterized in that Above the manifold (20, 21, 120, 121), the base (19, 119) includes two rotatable rods: - said first rotatable lever (28a, 128a), - the second rotatable lever (28b, 128b), The rotatable rod (28a, 28b, 128a, 128b) has a polygonal cross section and / or an elliptical cross section, and the rotatable rod (28a, 28b, 128a, 128b) extends between two second side walls (29a, 29b), which are perpendicular to the first side wall (27a, 27b, 127a) of the generally tray-shaped body (24, 124) of the base (19, 119).

5. The electric pump (10, 110) according to claim 4, characterized in that At least the first rotatable lever (28a, 128a) has a portion (39, 139) that projects from the body (24, 124) of the base (19, 119), and the portion (39, 139) can be engaged for rotation from the single point (23, 123).

6. The electric pump (10, 110) according to claim 1, characterized in that: - each of the first engaging elements (22a', 22a", 122a', 122a") is coplanar with a corresponding one of the second engaging elements (22b', 22b", 122b', 122b"), - Each of the first engagement elements (22a', 22a", 122a', 122a") is mechanically connected to a corresponding one of the second engagement elements (22b', 22b", 122b', 122b") via a link element (30, 130).

7. The electric pump (10, 110) according to claim 1, characterized in that Each of the engaging elements (22a', 22a", 22b', 22b", 122a', 122a", 122b', 122b") comprises a plate (32) keyed to a corresponding one of the rotatable rods (28a, 28b, 128a, 128b) at right angles to the rotatable rods (28a, 28b, 128a, 128b), the plate (32) having a circular edge (33), an arcuate protrusion (34) extending from the plate (32), the arcuate protrusion (34) having an extension substantially parallel to the extension of the circular edge (33).

8. The electric pump (10, 110) according to claim 7, characterized in that The protrusion (34) extends substantially from one end of the circular edge (33), and there is an opening (35) between the circular edge (33) of the plate (32) and the protrusion (34), and the opening (35) is used for the sliding of the corresponding rod (31a, 31b, 131a, 131b) of the tray part (25, 125).

9. The electric pump (10, 110) according to claim 7, characterized in that At the end of the circular edge (33) of the plate (32) opposite the end from which the projection (34) extends, there is a shaped portion (36) which at least partially follows the contour of the corresponding rod (31a, 31b, 131a, 131b) of the tray portion (25, 125).

10. The electric pump (10, 110) according to claim 5, characterized in that The electric pump (10, 110) comprises an operating lever (37, 137) for actuating the detachable coupling device, the operating lever (37, 137) having an end (38, 138) for interacting with the first rotatable lever (28a, 128a) of the base (19, 119), the end (38, 138) of the operating lever (37, 137) being complementarily shaped or complementary to the portion (39, 139) of the first rotatable lever (28a, 128a) protruding from the body (24, 124) of the base (19, 119).

11. The electric pump (110) according to any one of claims 1 to 10, characterized in that The electric pump (110) includes at least one auxiliary removable fixing element (150) located between the pump body (111) and the base (119).

12. The electric pump (10, 110) according to claim 11, characterized in that The auxiliary removable fixing element (150) is constituted by a threaded knob comprising a handle (151) and a stem (155) extending from the handle (151) and being at least partially threaded.

13. The electric pump (10, 110) according to claim 12, characterized in that The stem (155) is provided with a wider, threaded end (157), wherein: - a respective first through hole (152) passing through said tray portion (125), - a second hole (153) screwed into the side wall of the substantially tray-shaped body (124) of the base (119), the second hole (153) corresponding to the first through hole (152) and coaxial with the first through hole (152).

14. The electric pump (110) according to claim 13, characterized in that The first through hole (152) has: a first portion (160) of reduced cross-section, said first portion (160) being threaded upon passage of said end (157) of said stem (155), - a second portion (161), the second portion (161) having a wider cross-section, the wider cross-section being larger than the cross-section of the end portion (157) of the rod portion (155), the second portion (161) being close to the second hole (153), the end portion (157) of the rod portion (155) being able to slide in the second portion (161).

15. The electric pump (110) according to claim 13, characterized in that A spring (154) exists between the handle (151) of the knob and the entrance of the first through hole (152), and surrounds the stem (155).

16. The electric pump (110) according to claim 3, characterized in that The tray portion (125) is provided with a plurality of legs (156), and in the use configuration of the electric pump (110), the legs extend from the surface of the tray portion (125) facing the base (119).

17. The electric pump (10, 110) according to claim 1, characterized in that The electric pump (10, 110) comprises a sensor for detecting the correct fixing of the pump body (11, 111) to the base (19, 119).

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