MOUNTING STRUCTURE OF WATER PUMP

Description

Technical Field

[0001] The invention relates to an installation structure of a water pump, and relates to modification of a pump body of a water pump and an assembly structure of an installation base, and particularly relates to a water pump installation structure in which an orientation of a water outlet of a pump body is adjustable so as to be conveniently connected with a pipeline.

Technical Background

[0002] For convenience of installation and use, a water pump applied to an aquarium, a garden pond or an aquaculture pond is generally provided with an installation base for installing the water pump on bottom of the pond or an installation bracket.

[0003] In the prior art, the installation base can be directly connected with a pump case integrally, or be fixed on the pump case via screws. The installation base and the pump case are unadjustable after being assembled together, so that a position and direction on the pump case between the water outlet and the installation base are relatively fixed, and a direction of an installation face of the installation base has to be changed once the position or direction of the water outlet is required to be adjusted.

[0004] Generally, a bottom surface of the installation base is installed on a bottom wall of a pond. Because water outlets of most of water pumps are arranged in a direction perpendicular to the bottom surface of the installation base, the water outlets of most of water pumps are in an upward direction perpendicular to the bottom wall of the pond.

[0005] A pipeline is used in a pond for connecting a water pump to lead water out of the pond, and the water outlet is always required to be led to lateral directions on two sides of the water pump, however the orientation of the existing water outlet is unadjustable in use, so that difficulties would be caused to pipeline installation, and a pipeline is likely to be bended during installation, and/or an elbow or a flexible pipe is required to be adopted for changing a water draining direction, thereby increasing not only consumption of water flow, but also equipment cost and/or operation cost. An example of a take-up device for power supply cable to hung-down motor pump facilitating unwinding and take-up of a power supply cable is disclosed in the application JPS58144068A, an example of a submerged pump surely sets a submerged pump on a seat surface and improve the sealing property at pump setting is disclosed in the application JPH06288382A, an example of a group-motorized pumps for wells, driving holes, etc, which can be used without any modification of its construction for the most diverse suction plane heights is disclosed in the application FR597729A, an example of a pump device for pumping liquefied gas which enable main parts of a pump device to be easily removed from a liquefied gas storage tank is disclosed in the application JPS58204995A, an example of a method and apparatus for mounting an electric water pump providing a simple, low cost and convenient way to mount an electric water pump at any location along three orthogonal axes adjacent the exterior wall of a tub for use in whirlpool bath systems is disclosed in the application US7191998B1, and an example of an assembly structure of heat dissipation fan capable of regulating air exhausing direction which uses a single heat dissipation structure to carry out heat exhaust for the chip processor is disclosed in the application CN2761890Y.

Summary of Invention

[0006] The invention aims to provide an installation structure of a water pump. A pump body of the water pump can rotate by 360 degrees around planes of an installation base in up, down, left and right directions, so that a position and direction of a water outlet of the pump body is adjustable in use for conveniently connecting with a water diversion pipeline.

[0007] The invention further aims to provide an installation structure of a water pump comprising a pump body, an installation base and a rotary shaft, so that people can simply and conveniently mount or dismount the structure as required.

[0008] An installation structure of a water pump includes a pump body which is provided with a water outlet and an installation base. The installation base is provided with a rotary shaft hole; the pump body is provided with a rotary shaft which is installed in the rotary shaft hole and is rotatable around the rotary shaft hole.

[0009] Hence, when using the water pump with this kind of structure after the installation base is fixed, position and direction of the water outlet is still adjustable by the pump body via rotation of the rotary shaft, so as to achieve a better connection with a pipeline, thereby solving a problem that an elbow is to be relied upon or the pipeline would bend during connection, so that connection and installation are more convenient; meanwhile, smoothness of the pipeline facilitates reduction of water flow consumption, and improvement of operation efficiency of the water pump.

[0010] The rotary shaft hole is axially provided with a first limit surface and a second limit surface; the pump body and the rotary shaft are axially provided with a third limit surface and a fourth limit surface, respectively; and the first limit surface and the second limit surface are positioned between the third limit surface and the fourth limit surface; or, the installation base is axially provided with a first limit surface, and a second limit surface; the rotary shaft is axially provided with a third limit surface and a fourth limit surface, and the third limit surface and the fourth limit surface are positioned between the first limit surface and the second limit surface, and two limit surfaces positioned on outer sides can restrict axial displacement of two limit surfaces positioned in the middle. Thus, axial displacement between the rotary shaft and the rotary shaft hole can be prevented so as to prevent falling off between the rotary shaft and the rotary shaft hole.

[0011] The rotary shaft is directly formed at a periphery of the pump body in axial direction, so that the rotary shaft can directly drive the pump body to rotate around the rotary shaft hole of the installation base.

[0012] In the scheme above, the rotary shaft is an independent annular element, and can be sleeved outside of the pump body via a central hole of the rotary shaft, and the rotary shaft and the pump body cannot rotate relatively after being assembled, so that the rotary shaft can drive the pump body to rotate, and there is the possibility of dismounting and assembly between the pump body and the rotary shaft.

[0013] The rotary shaft extends out from the rotary shaft hole of the installation base from back to front; an outer convex ring is formed at a rear part of the rotary shaft; a front end surface of the outer convex ring acts as a fourth limit surface; a rear end surface of the rotary shaft hole acts as a second limit surface which is blocked by the fourth limit surface, and the rotary shaft is positioned in the rotary shaft hole of the installation base; the pump body extends into the central hole of the rotary shaft from front to back; the pump body is provided with bulged shoulders; a rear end surface of each bulged shoulder acts as third limit surfaces; a front end surface of the rotary shaft hole acts as a first limit surface which is blocked by the third limit surfaces, and the pump body is positioned in the central hole of the rotary shaft; the rotary shaft is axially fixed on the pump body via screws. Therefore, the installation base can be clamped between the rotary shaft and the pump body; moreover, the rotary shaft cannot axially move or fall off along the pump body.

[0014] Regarding the installation structure of the water pump obtained in this way, because the annular rotary shaft is clamped between the rotary shaft hole and the pump body by the installation base via the rotary shaft hole, and the rotary shaft is fixed on the pump body, not only the installation base and the pump body are connected together and cannot be separated from each other, but also the rotary shaft cannot axially move along the pump body; meanwhile, weight of the pump body is supported upon the installation base via the rotary shaft.

[0015] Regarding the installation structure of the water pump of the invention, the rotary shaft can rotate along an inner side wall of the rotary shaft hole, so that the pump body can be driven by the rotary shaft to rotate by 360 degrees around the rotary shaft hole of the installation base along planes in up, down, left and right directions, so that position and orientation of the water outlet in the pump body is adjustable so as to connect with pipelines led in from different directions; because adjustment of the water outlet enables the water outlet to be located in any position of the installation base at 360 degrees along planes in up, down, left and right directions, so that adjustment of the water outlet has a wider range.

[0016] The installation base of the water pump is simple in structure and is easy to produce, and a sleeving structure is adopted for the rotary shaft and the pump body, and limit surfaces of the installation base and the pump body or the rotary shaft are adopted to limit each other, so that the pump body, the rotary shaft and the installation base can be easily dismounted and assembled, and are convenient for users to use; meanwhile, it would facilitate manufacturers to reduce packaging and transportation costs.

[0017] The rotary shaft hole and/or the rotary shaft can be composed of one or a plurality of planes or cambered surfaces.

[0018] Any of the first, second, third and fourth limit surfaces can be composed of one or a plurality of continuous or discontinuous planes or cambered surfaces.

[0019] An anti-sliding structure is further arranged between the installation base and the rotary shaft or between the installation base and the pump body, so that the pump body and the installation base can be positioned relatively after adjusting the water outlet, so as to prevent random free rotation of the pump body during water pumping.

Description of Drawings

[0020] 

Fig. 1 is a structural schematic diagram showing a specific embodiment of the invention;

Fig. 2 is an exploded schematic diagram showing each part of an installation structure of a water pump in Fig. 1;

Fig. 3 is a sectional schematic diagram showing the installation structure of the water pump in Fig. 1;

Fig. 4 is a structural schematic diagram showing another specific embodiment of the invention;

Fig. 5 is an exploded schematic diagram showing each part of the installation structure of the water pump in Fig. 4;

Fig. 6 is a sectional schematic diagram showing the installation structure of the water pump in Fig. 4.

Detailed Description of Embodiment

[0021] Structures of the invention are described in detail below in conjunction with accompanying drawings.

Embodiment 1:

[0022] Referring to Fig 1 to Fig. 3, an installation structure of a water pump includes a pump body 1, an installation base 2, a rotary shaft 3 and screws 4.

[0023] The pump body 1 is provided with a water outlet 11, and is axially provided with a plurality of protruding edges 1a; a periphery of the outer side of the rotary shaft 3 is provided with a rotary shaft surface 31; the installation base 2 is provided with a rotary shaft hole 21; the rotary shaft surface 31 can be internally sleeved into the rotary shaft hole 21 which supports the rotary shaft 3 and enables the rotary shaft 3 to rotate; an inner side surface of the rotary shaft 3 is also provided with a plurality of grooves 33; the rotary shaft 3 can externally sleeve outer side of the pump body 1, and the plurality of protruding edges 1a can be respectively positioned in and matched with the plurality of grooves 33, so that the rotary shaft 3 and the pump body 1 cannot rotate relatively, and the rotary shaft 3 can drive the pump body 1 to rotate around the rotary shaft hole 21; in addition, a front end surface of the rotary shaft hole 21 acts as a first limit surface 21a, and a rear end surface of the rotary shaft hole 21 acts as a second limit surface 21b; an outer convex ring 32 is formed on a rear part of the rotary shaft 3, and a front end surface 32a of the outer convex ring 32 acts as a fourth limit surface; a rear end surface of each bulged shoulder 12 of an installation column of the pump body 1 is used as a third limit surface 12a; the rotary shaft 3 extends out from the rotary shaft hole 21 of the installation base 2 from back to front, and the second limit surface 21b is blocked by the fourth limit surface 32a so as to prevent the rotary shaft hole 21 from displacing or falling off backwardly, and the rotary shaft 3 is positioned in the rotary shaft hole 21 of the installation base 2; the pump body 1 extends into a central hole of the rotary shaft 3 from front to back, and the first limit surface 21a is blocked by the third limit surface 12a so as to prevent the rotary shaft hole 21 from displacing or falling off forwardly, and the pump body 1 is positioned in the central hole of the rotary shaft 3; moreover, the rotary shaft hole 21 of the installation base 2 is provided with a clamping block 23 which is provided with a protruding edge 23a; the rotary shaft surface 31 of the rotary shaft 3 is provided with a plurality of grooves 34; when the rotary shaft 3 rotates around the rotary shaft hole 21, the protruding edge 23a can be clamped into a certain groove 34, thereby preventing free rotation between the rotary shaft 3 and the pump body 1; finally, the rotary shaft 3 is axially fixed on the pump body 1 via screws 4.

[0024] In this way, the installation base 2 can be clamped between the third limit surfaces 12a of the pump body 1 and the fourth limit surface 32a of the rotary shaft 3 via the first limit surface 21a and the second limit surface 21b of the rotary shaft hole 21, and the rotary shaft 3 is fixed on the pump body 1 via the screws 4, hence, not only the installation base 2 and the pump body 1 are connected together and cannot separate from each other, but also the rotary shaft 3 cannot axially move along the pump body 1; meanwhile, weight of the pump body 1 is supported upon the installation base 2 via the rotary shaft 3, and most importantly, the rotary shaft 3 can rotate in the rotary shaft hole 21 with manpower, and drive the pump body 1 to rotate around the installation base 2; in addition, the protruding edge 23a can be clamped into a certain groove 34 to prevent free rotation between the rotary shaft 3 and the pump body 1 so as to prevent random rotation of the pump body 1 that is likely to occur during water pumping.

Embodiment 2:

[0025] Referring to Fig. 4-Fig. 6, an installation structure of a water pump includes a pump body 1, an installation base 2, a rotary shaft 3, screws 4, a limit ring 5 and an anti-sliding screw 6. The pump body 1 is provided with a water outlet 11; an annular rotary shaft 3 is axially formed on periphery of outer side of the pump body 1; a front end surface of the rotary shaft 3 acts as a third limit surface 3a, and a rear end surface of the rotary shaft 3 acts as a fourth limit surface 3b; the installation base 2 is provided with a rotary shaft hole 21, a rotary shaft surface 31 can be internally sleeved in the rotary shaft hole 21, the rotary shaft hole 21 supports the rotary shaft 3 and enables the rotary shaft 3 to rotate, an inner bulged ring 22 is formed on a rear end part of the rotary shaft hole 21, and an inner side surface of the inner bulged ring 22 acts as a second limit surface 22a; a limit ring 5 is a flat annular element and is provided with a plurality of screw holes which can be fixed with the installation base 2 via the screws 4, middle of the limit ring 5 is provided with a hole through which the pump body 1 can extend through, and a surface of the limit ring 5 toward the installation base 2 acts as a first limit surface 5a; after the limit ring 5 and the installation base 2 are fixedly assembled, the first limit surface 5a on the limit ring 5 is positioned on a front end of the third limit surface 3a of the rotary shaft 3 in axial direction so as to restrict forwardly displacing or falling off of the rotary shaft 3; the second limit surface 22a on the installation base 2 is positioned on a rear end of the fourth limit surface 3b of the rotary shaft 3 so as to restrict backwardly displacing or falling off of the rotary shaft 3; an installation frame is provided with a threaded anti-sliding screw hole 23; the anti-sliding screw 6 is threaded and is installed in the anti-sliding screw hole 23 of the installation frame; rotation of the anti-sliding screw 6 enables the anti-sliding screw 6 to displace inwardly and abut against the rotary shaft 3, or to displace outwardly and loosen the rotary shaft 3.

[0026] Thus, the pump body 1 is clamped between the first limit surface 5a of the limit ring 5 and the second limit surface 22a of the installation base 2 by the third limit surface 3a and the fourth limit surface 3b of the rotary shaft 3, and the limit ring 5 is fixed on the installation base 2 via the screws 4, therefore, not only the pump body 1 and the installation base 2 are connected together and cannot separate from each other, but also the rotary shaft 3 cannot axially move along the rotary shaft hole 21 of the installation base 2; meanwhile, weight of the pump body 1 is supported upon the installation base 2 via the rotary shaft 3, and most importantly, the rotary shaft 3 can rotate in the rotary shaft hole 21with manpower, and drive the pump body 1 to rotate around the installation base 2; in addition, the anti-sliding screw 6 can be rotated to displace inwardly and abut against the rotary shaft 3 so as to prevent random rotation of the pump body 1 that is likely to occur during water pumping.

Claims

1. An installation structure of a water pump, comprising a pump body (1) and an installation base (2), the pump body (1) being provided with a water outlet (11),

the installation base (2) is provided with a rotary shaft hole (21);

the pump body (1) is provided with a rotary shaft (3) which is installed in the rotary shaft hole (21) and is rotatable around the rotary shaft hole (21); characterized in that

the installation structure further comprises an anti-sliding structure arranged between the installation base (2) and the rotary shaft (3) or between the installation base (2) and the pump body (1); wherein

either, the rotary shaft hole (21) is axially provided with a first limit surface (21a) and a second limit surface (21b); the pump body (1) and the rotary shaft (3) are axially provided with a third limit surface (12a) and a fourth limit surface (32a), respectively; and the first limit surface (21a) and the second limit surface (21b) are positioned between the third limit surface (12a) and the fourth limit surface (32a);

or, the installation base (2) is axially provided with a first limit surface (5a), and a second limit surface (22a); the rotary shaft (3) is axially provided with a third limit surface (3a), and a fourth limit surface (3b), and the third limit surface (3a) and the fourth limit surface (3b) are positioned between the first limit surface (5a) and the second limit surface (22a).

2. The installation structure of a water pump according to claim 1, wherein the rotary shaft (3) is directly formed at a periphery of the pump body (1) in an axial direction.

3. The installation structure of a water pump according to claim 1, wherein the rotary shaft (3) is an independent annular element, and can be sleeved outside of the pump body (1) via a central hole, and the rotary shaft (3) and the pump body (1) cannot rotate relatively after assembly.

4. The installation structure of a water pump according to claim 3, wherein the rotary shaft (3) extends out from the rotary shaft hole (21) of the installation base (2) from back to front; an outer convex ring (32) is formed at a rear part of the rotary shaft (3); a front end surface of the outer convex ring (32) acts as the fourth limit surface (32a); a rear end surface of the rotary shaft hole (21) acts as the second limit surface (21b) which is blocked by the fourth limit surface (32a), and the rotary shaft (3) is positioned in the rotary shaft hole (21) of the installation base (2); the pump body (1) extends into the central hole of the rotary shaft (3) from front to back; the pump body (1) is provided with bulged shoulders (12); a rear end surface of each bulged shoulder (12) acts as the third limit surface (12a), a front end surface of the rotary shaft hole (21) acts as the first limit surface (21a) which is blocked by the third limit surface (12a), and the pump body (1) is positioned in the central hole of the rotary shaft (3); screws (4) axially fix the rotary shaft (3) on the pump body (1).

5. The installation structure of a water pump according to claim 1, wherein the rotary shaft hole (21) and/or the rotary shaft (3) are/is composed of one or a plurality of cambered surfaces or planes; any of the first limit surface (5a, 21a), second limit surface (21b, 22a), third limit surface (12a, 3a) and fourth limit surface (32a, 3b) is composed of one or a plurality of continuous or discontinuous planes or cambered surfaces.

Ansprüche

1. Einbaustruktur einer Wasserpumpe, umfassend einen Pumpenkörper (1) und eine Einbaubasis (2), wobei der Pumpenkörper (1) mit einem Wasserauslass (11) versehen ist,

wobei die Einbaubasis (2) mit einer Wellenbohrung (21) versehen ist;

wobei der Pumpenkörper (1) mit einer Welle (3) versehen ist, die in der Wellenbohrung (21) montiert und um die Wellenbohrung (21) drehbar ist; dadurch gekennzeichnet, dass

die Einbaustruktur ferner eine Anti-Rutsch-Struktur umfasst, die zwischen der Einbaubasis (2) und der Welle (3) oder zwischen der Einbaubasis (2) und dem Pumpenkörper (1) angeordnet ist; wobei

entweder die Wellenbohrung (21) axial mit einer ersten Anschlagfläche (21a) und einer zweiten Anschlagfläche (21b) versehen ist; der Pumpenkörper (1) und die Welle (3) axial mit einer dritten Anschlagfläche (12a) bzw. einer vierten Anschlagfläche (32a) versehen sind und die erste Anschlagfläche (21a) und die zweite Anschlagfläche (21b) zwischen der dritten Anschlagfläche (12a) und der vierten Anschlagfläche (32a) positioniert sind;

oder die Einbaubasis (2) axial mit einer ersten Anschlagfläche (5a) und einer zweiten Anschlagfläche (22a) versehen ist; die Welle (3) axial mit einer dritten Anschlagfläche (3a) und einer vierten Anschlagfläche (3b) versehen ist und die dritte Anschlagfläche (3a) und die vierte Anschlagfläche (3b) zwischen der ersten Anschlagfläche (5a) und der zweiten Anschlagfläche (22a) positioniert sind.

2. Einbaustruktur einer Wasserpumpe nach Anspruch 1, wobei die Welle (3) in Axialrichtung direkt am Umfang des Pumpenkörpers (1) ausgebildet ist.

3. Einbaustruktur einer Wasserpumpe nach Anspruch 1, wobei die Welle (3) ein unabhängiges Ringelement ist und über eine mittige Bohrung außerhalb des Pumpenkörpers (1) umhüllen kann, und wobei sich die Welle (3) und der Pumpenkörper (1) nach der Montage nicht zueinander drehen können.

4. Einbaustruktur einer Wasserpumpe nach Anspruch 3, wobei sich die Welle (3) aus der Wellenbohrung (21) der Einbaubasis (2) heraus von hinten nach vorn erstreckt; wobei ein äußerer konvexer Ring (32) an einem hinteren Teil der Welle (3) ausgebildet ist; wobei eine Vorderendenfläche des äußeren konvexen Rings (32) als vierte Anschlagfläche (32a) fungiert; wobei eine Hinterendenfläche der Wellenbohrung (21) als zweite Anschlagfläche (21b) fungiert, die von der vierten Anschlagfläche (32a) blockiert wird, und wobei die Welle (3) in der Wellenbohrung (21) der Einbaubasis (2) positioniert ist; wobei sich der Pumpenkörper (1) von vorn nach hinten in die mittige Bohrung der Welle (3) erstreckt; wobei der Pumpenkörper (1) mit überhängenden Schultern (12) versehen ist; wobei eine Hinterendenfläche jeder überhängenden Schulter (12) als dritte Anschlagfläche (12a) fungiert, wobei eine Vorderendenfläche der Wellenbohrung (21) als erste Anschlagfläche (21a) fungiert, die von der dritten Anschlagfläche (12a) blockiert wird, und wobei der Pumpenkörper (1) in der mittigen Bohrung der Welle (3) positioniert ist; wobei Schrauben (4) die Welle (3) axial am Pumpenkörper (1) fixieren.

5. Einbaustruktur einer Wasserpumpe nach Anspruch 1, wobei die Wellenbohrung (21) und/oder die Welle (3) aus einer oder mehreren gewölbten Flächen oder Ebenen besteht/bestehen; wobei eine beliebige der ersten Anschlagfläche (5a, 21a), der zweiten Anschlagfläche (21b, 22a), der dritten Anschlagfläche (12a, 3a) und der vierten Anschlagfläche (32a, 3b) aus einer oder mehreren durchgehenden oder unterbrochenen Ebenen oder gewölbten Flächen besteht.

Revendications

1. Structure d'installation d'une pompe à eau, comprenant un corps de pompe (1) et une base d'installation (2), le corps de pompe (1) comportant une sortie d'eau (11),

la base d'installation (2) comporte un trou d'arbre rotatif (21) ;

le corps de pompe (1) comporte un arbre rotatif (3) qui est installé dans le trou d'arbre rotatif (21) et qui peut tourner autour du trou d'arbre rotatif (21) ; caractérisée en ce que

la structure d'installation comprend en outre une structure anti-glissement disposée entre la base d'installation (2) et l'arbre rotatif (3) ou entre la base d'installation (2) et le corps de pompe (1) ; dans laquelle

soit, le trou d'arbre rotatif (21) comporte axialement une première surface limite (21a) et une deuxième surface limite (21b) ; le corps de pompe (1) et l'arbre rotatif (3) comportent axialement une troisième surface limite (12a) et une quatrième surface limite (32a), respectivement ; et la première surface limite (21a) et la deuxième surface limite (21b) sont positionnées entre la troisième surface limite (12a) et la quatrième surface limite (32a) ;

soit, la base d'installation (2) comporte axialement une première surface limite (5a) et une deuxième surface limite (22a) ; l'arbre rotatif (3) comporte axialement une troisième surface limite (3a) et une quatrième surface limite (3b), et la troisième surface limite (3a) et la quatrième surface limite (3b) sont positionnées entre la première surface limite (5a) et la deuxième surface limite (22a).

2. Structure d'installation d'une pompe à eau selon la revendication 1, dans laquelle l'arbre rotatif (3) est directement formé à une périphérie du corps de pompe (1) dans une direction axiale.

3. Structure d'installation d'une pompe à eau selon la revendication 1, dans laquelle l'arbre rotatif (3) est un élément annulaire indépendant, et peut être manchonné à l'extérieur du corps de pompe (1) par l'intermédiaire d'un trou central, et l'arbre rotatif (3) et le corps de pompe (1) ne peuvent pas tourner l'un par rapport à l'autre après l'assemblage.

4. Structure d'installation d'une pompe à eau selon la revendication 3, dans laquelle l'arbre rotatif (3) sort du trou d'arbre rotatif (21) de la base d'installation (2) de l'arrière vers l'avant ; un anneau convexe extérieur (32) est formé dans une partie arrière de l'arbre rotatif (3) ; une surface d'extrémité avant de l'anneau convexe extérieur (32) agit comme la quatrième surface limite (32a) ; une surface d'extrémité arrière du trou d'arbre rotatif (21) agit comme la deuxième surface limite (21b) qui est bloquée par la quatrième surface limite (32a), et l'arbre rotatif (3) est positionné dans le trou d'arbre rotatif (21) de la base d'installation (2) ; le corps de pompe (1) s'étend dans le trou central de l'arbre rotatif (3) de l'avant vers l'arrière ; le corps de pompe (1) comporte des épaulements bombés (12) ; une surface d'extrémité arrière de chaque épaulement bombé (12) agit comme la troisième surface limite (12a), une surface d'extrémité avant du trou d'arbre rotatif (21) agit comme la première surface limite (21a) qui est bloquée par la troisième surface limite (12a), et le corps de pompe (1) est positionné dans le trou central de l'arbre rotatif (3) ; des vis (4) fixent axialement l'arbre rotatif (3) sur le corps de pompe (1).

5. Structure d'installation d'une pompe à eau selon la revendication 1, dans laquelle le trou d'arbre rotatif (21) et/ou l'arbre rotatif (3) est/sont composé(s) d'une ou de plusieurs surfaces ou plans incurvés ; l'une quelconque de la première surface limite (5a, 21a), la deuxième surface limite (21b, 22a), la troisième surface limite (12a, 3a) et la quatrième surface limite (32a, 3b) est composée d'un ou de plusieurs plans continus ou discontinus ou de surfaces incurvées.

Drawing