Circulating pump comprising pump housing, motor housing and junction box

Abstract

The utility model relates to a circulating pump (1) which comprises a pump shell (10) provided with an impeller, a motor shell (20) provided with an electric motor, a junction box (30) provided with electrical and / or electronic components used for controlling the electric motor, and a motor shell (30) provided with an electric and / or electronic component used for driving the motor shell (20) to rotate around the rotating axis (R) of the pump (1). And having a connection element (321) establishing an electrical connection of the terminal box (30), the electric motor being arranged between the pump housing (10) and the terminal box (30).

Description

TECHNICAL FIELD

[0001] The utility model relates to a circulating pump, the circulating pump includes pump casing, motor casing and terminal box. BACKGROUND

[0002] There are many developments in the field of pumping, in particular relating to pumping liquids, such as water and / or circulating pumps, in particular in the interplay of electrical engineering, mechanical engineering and telecommunications, in particular taking into account more sustainability, ease of installation and / or reduced maintenance work.

[0003] Circulating pumps are well known and are used, for example, in industrial applications as well as in heating systems of private households. For proper functioning, a circulating pump requires one or more connection elements, in particular for power supply and / or signal transmission.

[0004] The connection elements are usually located outside the terminal box. The terminal box comprises electrical and / or electronic components for controlling an electric motor driving an impeller within the pump casing. The terminal box further comprises connection elements to establish electrical connections of the terminal box.

[0005] The position and orientation of such connection elements can significantly influence the overall size of the circulating pump, in particular when counterpart parts of the connection elements are connected to the connection elements. In the prior art, there are two main approaches or solutions to ensure the power supply of the circulating pump and / or the signal exchange between the circulating pump and other devices. According to a first solution, the connection elements are formed on the outside of the terminal box, providing access from the rear or front. This solution, although powerful and providing greater accessibility, increases the external size of the terminal box, in particular when counterpart parts of the respective connection elements are connected to the circulating pump. A second solution requires the connection of the counterpart parts to the connection elements from the lateral side or surface of the circulating pump. The second solution allows for a smaller overall or external size of the pump when one or more counterpart parts are inserted or connected to the pump. However, the second solution also has its disadvantages, as it increases the risk of moving the counterpart parts during operation of the pump. Furthermore, in the second solution, it can be relatively difficult to disconnect the counterpart parts from the connection elements, for example due to space challenges, such as in the basement of a private household. SUMMARY

[0006] It is an object of the utility model to provide a technically simple, effective and cost-effective solution for providing a circulating pump with a more compact overall size.

[0007] The object of the utility model is achieved by a circulating pump, comprising:

[0008] - a pump casing with an impeller rotatable about a rotational axis of the pump,

[0009] - a motor housing with an electric motor coaxially connected to the impeller and driving the impeller,

[0010] - a terminal box with electrical and / or electronic components for controlling the electric motor and with connection elements for establishing electrical connections of the terminal box,

[0011] The electric motor is arranged between the pump housing and the terminal box,

[0012] The connection elements are formed to define a connection direction or axis perpendicular to the rotation axis and, for establishing the electrical connections, a counterpart of the connection elements has to be moved along the connection direction or axis.

[0013] Thereby, according to the utility model, especially when the counterpart is inserted or connected to the connection elements, an optimized overall size of the circulation pump can advantageously be provided. In other words, the maximum outer dimensions of the circulation pump and the corresponding space requirements are thus advantageously reduced. Said advantages are in particular due to the fact that the connection elements do not need to be formed on the back or rear surface of the pump, which reduces the maximum length of the pump, the length of the pump being configured parallel to the rotation axis of the pump. The circulation pump according to the utility model further reduces the risk of moving the counterpart during operation, while ensuring that the counterpart can still be safely and easily connected to and disconnected from the pump.

[0014] In particular, the connection direction or axis can be a radial direction of the circulation pump. In particular, the radial direction of the pump can be defined as a direction perpendicular to the rotation axis. Furthermore, the terminal box can comprise one or more recesses and / or recesses. Preferably, the terminal box comprises two connection elements, for example one connection element for supplying electrical power and another connection element for signal exchange. One or both connection elements (or even more than two connection elements) can each be formed within a recess or recess of the terminal box, which can be advantageous, since thereby the overall size or volume of the pump can be reduced. Furthermore, configuring the connection elements within the recesses can simplify the insertion and extraction of the counterpart, since one or more inner surface portions of the recesses can serve as guiding means for the counterpart. At the same time, since a large portion of the counterpart is arranged within the recesses, the counterpart can be more safely kept in the inserted state. In other words, at least in the inserted or connected state, the recesses can increase the mechanical stability of the counterpart and / or the connection. The electrical connection within the meaning of the utility model also comprises an optical connection. In other words, the connection between the connection elements and the counterpart can also be optical.

[0015] According to the preferred embodiment of the utility model, the connection direction or axis and the rotation axis are skewed (deviated) and / or do not include a crossing point. The junction box can include a main section and a protruding section. The main section can be formed at least substantially around the rotation axis. The main section can also include a circumferential direction, along which the main section is configured, in particular symmetrically. On the other hand, the protruding section can extend, in particular perpendicularly, away from the rotation axis. Furthermore, the protruding section can be formed in a first position, which is arranged parallel to the outflow pipe of the circulation pump. The protruding section can also be formed in a second, third or fourth position. In the second position, the protruding section can be spaced apart by 90 degrees in the circumferential direction relative to the first position. In the third position, the protruding section can be spaced apart by 180 degrees in the circumferential direction relative to the first position. And in the fourth position, the protruding section can be spaced apart by 270 degrees in the circumferential direction relative to the first position. In other words, the connection direction or axis can be configured in two different directions, which are configured perpendicularly to each other.

[0016] In an advantageous embodiment of the utility model, the circulation pump includes an inflow pipe and an outflow pipe,

[0017] wherein the inflow pipe defines an inflow direction,

[0018] wherein the outflow pipe defines an outflow direction,

[0019] wherein the inflow direction and the outflow direction are formed at least partially perpendicularly to the rotation axis, wherein the connection element of the junction box is formed in particular in the vicinity of the outflow pipe of the pump. Preferably, the inflow pipe and the outflow pipe are arranged at least partially parallel to each other. Furthermore, preferably, the inflow pipe and the outflow pipe are arranged at least partially collinearly. In other words, the inflow direction can be identical to the outflow direction. However, it is also conceivable to form an angle between the inflow direction and the outflow direction. Within the meaning of the present application, in particular, the inflow direction and the outflow direction are the respective directions of the pumped medium at the inlet and outlet of the circulation pump. For example, the inflow pipe can include an inflow flange, the inflow direction being defined as the direction of the pumped medium at the position of the inflow flange. Similarly, the outflow pipe can include an outflow flange, the outflow direction being defined as the direction of the pumped medium at the position of the outflow flange.

[0020] According to a further embodiment of the utility model, the terminal box comprises a front surface, which is formed perpendicular to the rotation axis, which front surface faces away from the motor housing, wherein the terminal box further comprises a first lateral surface, which is formed perpendicular to the front surface, wherein the connection element is formed in or on the first lateral surface. The terminal box can have a first lateral surface and a second lateral surface, which are parallel to each other. Furthermore, the first connection element can be configured or formed in the first lateral surface. The first connection element can provide power to the pump. Additionally, the first connection element can also enable signal transmission / exchange and processing, for example pulse width modulation.

[0021] An advantageous embodiment of the utility model comprises a further connection element, which is formed to define a further connection direction or axis perpendicular to the rotation axis, and for establishing a further electrical connection, a further counterpart needs to be moved along the further connection direction or axis, wherein the further connection direction or axis is preferably arranged coaxially to the connection direction or axis. Both the connection element and the further connection element can be configured in the projecting section of the terminal box. Both the connection element and the further connection element can be configured in or on the first lateral surface. Alternatively, the first connection element can be formed in or on the first lateral surface, while the further connection element can be formed in or on the second lateral surface. Preferably, the connection element has a first distance to the rotation axis, the further connection element has a second distance to the rotation axis, and the first distance and the second distance are preferably equal in value.

[0022] According to an advantageous embodiment of the utility model, the junction box comprises a rear surface which is formed perpendicular to the rotation axis and parallel to the front surface, the rear surface facing the motor housing, wherein the rear surface comprises a locking element for positioning and / or fixing the counterpart. Thus, the counterpart can advantageously be fixed against unwanted movement and pulling out. In other words, the locking element can increase the mechanical stability of the connection between the connection element and the counterpart of the connection element. The counterpart can comprise a shape which geometrically corresponds to the shape of the locking element. For example, the counterpart can comprise a connection portion which mechanically interacts with the locking element. For example, the locking element can be configured as a snap-in element, thereby enabling the counterpart to be snapped into the locking element. Alternatively or additionally, the connection portion of the locking element and / or the counterpart can be configured flexibly or elastically. In particular, the connection portion can be configured pivotably, foldably, collapsibly, movably, etc. in order to establish a connection with the locking element. It is also conceivable that the locking element comprises a locking groove or a locking recess in order to match the shape of the connection portion of the counterpart. Furthermore, the locking element can be configured as a latch, wherein a bolt which is displaceably movable can interact with the counterpart, thereby fixing the counterpart in its position. Furthermore, the locking element can be configured as a multipart element. For example, the locking element can comprise an elongated first element made of rubber or another polymer which can be wrapped around the counterpart, thereby fixing the counterpart, and a rigid second element which can be connected to the first element.

[0023] According to an advantageous embodiment of the utility model, at least a portion of the locking element protrudes towards the motor housing. Preferably, the locking element can be formed as a wedge. When the counterpart is moved along the connection direction in order to establish an electrical connection of the junction box or the pump, the counterpart can be fixed in the connection position by means of a mechanical interaction between the connection portion of the counterpart and the locking element. To this end, the connection portion can be formed as a U-shape comprising two parallel sub-portions and a bottom sub-portion connecting the two parallel sub-portions. The connection portion of the counterpart can be displaced or pushed translationally or linearly through the slope of the locking element formed as a wedge, the bottom sub-portion facing the direction of movement of the counterpart, and the two parallel sub-portions moving along and / or parallel to the connection direction. As soon as the bottom sub-portion reaches the top of the slope, it can snap behind the locking element, thereby preventing an unwanted pulling out of the counterpart. To this end, at least the connection portion of the counterpart can be flexibly configured. It is generally conceivable that the locking element is also configured in or on the front surface. However, a protrusion on the front surface would increase the maximum length of the circulation pump. Thus, the locking element according to the utility model advantageously enables fixing the counterpart at least along a direction parallel to the rotation axis without increasing the outer or overall or external dimensions of the pump.

[0024] In one preferred embodiment of the utility model, the connecting element is or corresponds to a plug, the counterpart of the connecting element is or corresponds to a socket, and vice versa, and / or the other connecting element is or corresponds to a plug, and the other counterpart of the other connecting element is or corresponds to a socket, or vice versa. The plug or the socket, or at least a part of the plug or the socket, can advantageously be molded or cast onto the terminal box or a surface of the terminal box. It is particularly advantageous if one or more plugs or one or more sockets are formed as one-piece elements with at least a part of the terminal box, for example as a plastic injection-molded part, and also preferably have molded contact portions which terminate in the interior of the terminal box, preferably on or in a circuit board in the terminal box. The molding or casting can ensure a tight contact feed-through from the interior of the terminal box to the outside thereof, thereby forming a stable plug or socket or sleeve, etc., and at the same time fixing a circuit board arranged in the interior of the terminal box, the electrical contact portions terminating in the circuit board.

[0025] According to one particularly preferred embodiment of the utility model, the circulation pump comprises means for guiding the cable of the counterpart and / or the other counterpart, which means for guiding are preferably formed as grooves. Preferably, the circulation pump can comprise two or more means for guiding the cable of the counterpart and / or the other counterpart. Preferably, the means for guiding the cable are arranged in or on the terminal box, in particular on a lateral surface of the terminal box, wherein the lateral surface can be flat or curved, or a combination thereof. The means for guiding the cable can advantageously be formed as grooves, wherein the grooves can be formed linearly or comprise curves or a combination thereof for achieving an optimal guidance of the cable. Thus, the total space occupied by the circulation pump can advantageously be kept small. Preferably, at least a respective part of the groove or grooves can be formed perpendicular to the rotation axis. Furthermore, the grooves can be parallel to the inflow and outflow direction of the pumped medium. Preferably, a first groove is formed in or on a first lateral surface of the terminal box and a second groove is formed in or on a second lateral surface of the terminal box, the first groove and the second groove being formed parallel to each other and being spaced apart along the direction of the rotation axis.

[0026] According to one advantageous embodiment of the utility model, the circulation pump comprises an element for fixing the cable of the counterpart and / or the other counterpart, wherein preferably the means for guiding the cable comprise the element for fixing. The element for fixing can in particular be a locking, folding or snap-in element of plastic. Alternatively, the element for fixing is a narrowing or constriction in cross section. It is advantageous if the groove or grooves respectively comprise a narrowing or constriction in cross section of the means for guiding, which narrowing or constriction in cross section preferably has a dimension, for example parallel to the rotation axis, which is slightly smaller than the diameter of the cable which can be pushed into the groove. Thus, the cable can advantageously be fixed and the risk of an undesired pulling-out of the cable is reduced. Attached Figure Description

[0027] Figure 1a A first embodiment of the circulating pump of the present invention is shown schematically and exemplary in a first perspective view. The circulating pump has a connecting element and another connecting element, wherein a mating portion of the connecting element and another mating portion of the other connecting element are pulled out or disconnected from the connecting element and the other connecting element respectively.

[0028] Figure 1b The second perspective view schematically illustrates Figure 1a The first embodiment of the circulating pump shown.

[0029] Figure 2a A first embodiment of the circulating pump of the present invention is shown schematically and exemplary in a first perspective view. The circulating pump has a connecting element and another connecting element, wherein a mating portion of the connecting element and another mating portion of the other connecting element are inserted into or respectively connected to the connecting element and the other connecting element.

[0030] Figure 2b The second perspective view schematically illustrates... Figure 2a The first embodiment of the circulating pump shown.

[0031] Figure 3a A second embodiment of the circulating pump of the present invention is shown schematically and exemplary in a top view. The circulating pump has two devices for guiding cables, both of which are formed in the pump's junction box.

[0032] Figure 3b A second embodiment of the circulating pump of this utility model is schematically shown in the third perspective view.

[0033] Figure 3c A second embodiment of the circulating pump of the present invention is schematically shown in the fourth perspective view. The circulating pump has a mating part connected to a connecting element and another mating part connected to another connecting element. Detailed Implementation

[0034] The present invention will be described with reference to specific embodiments and certain accompanying drawings, but is not limited thereto, but is limited only by the claims. The described drawings are illustrative only and not restrictive. In the drawings, the dimensions of some elements may be exaggerated and not drawn to scale for illustrative purposes.

[0035] When referring to a singular noun, use the indefinite or definite article, such as "a", "an", or "the", which includes the plural form of the noun unless otherwise explicitly stated.

[0036] Furthermore, the terms first, second, third, etc. that are used in the description and claims are used for distinguishing between similar elements and not necessarily for describing a sequential or chronological order. It is to be understood that the terms so used are interchangeable, and that "embodiments" of the inventive concept described herein are capable of operating in other sequences than described or illustrated herein.

[0037] In Figure 1a , a perspective view of a first embodiment of the inventive circulating pump 1 is shown schematically, which has a connection element 321 and a further connection element 322, wherein a counter- part 321' of the connection element 321 and a further counter-part 322' of the further connection element 322 are pulled out or disconnected from the connection element 321 and the further connection element 322, respectively.

[0038] The circulating pump 1 comprises a pump housing 10 having an impeller therein, which is rotatable about a rotation axis R of the circulating pump 1. The impeller is not visible in Figure 1a and in the other figures. The circulating pump 1 further comprises a motor housing 20 having an electric motor therein, which is coaxially connected to and drives the impeller. The electric motor is not visible in Figure 1a , but also in the other figures. Furthermore, the circulating pump 1 comprises a terminal box 30 having electrical and / or electronic components therein for controlling the electric motor. Furthermore, the circulating pump 1 comprises a connection element 321 for establishing an electrical connection of the terminal box 30 and a further connection element 322 for establishing a connection for signal transmission and / or exchange. The electric motor, or in other words the motor housing 20, is arranged between the pump housing 10 and the terminal box 30.

[0039] According to the invention, the connection element 321 is formed such that a connection direction or axis C perpendicular to the rotation axis R is defined. Furthermore, the connection element 321' is formed such that, for establishing an electrical connection, the counter-part 321' of the connection element 321 needs to be moved along the connection direction or axis C.

[0040] Figure 1b A second perspective view is shown schematically in Figure 1a , showing a first embodiment of the inventive circulating pump 1. The circulating pump 1 comprises an inflow pipe 14, as shown in Figure 1a and Figure 1b , which is located in the lower half of the respective figure. The circulating pump 1 further comprises an outflow pipe 16, as shown in Figure 1b and Figure 1a , which is located in the upper half of the respective figure. The inflow pipe 14 defines an inflow direction 14' of the pumped medium and the outflow pipe 16 defines an outflow direction 16' of the pumped medium. Both the inflow pipe 14 and the outflow pipe 16 comprise a circular inner cross-section. The inflow direction 14' and the outflow direction 16' are formed at least partially perpendicular to the rotation axis R.

[0041] The connection element 321 of the terminal box 30 is formed in particular in the vicinity of the outflow pipe 16 of the pump 1. In other words, with regard to Figure 1a and Figure 1b , the connection element 321 is shown in the upper half of the respective figure.

[0042] The terminal box 30 comprises a front surface 36 Figure 1b which is formed perpendicular to the rotation axis R, which front surface 36 faces away from the motor housing 20. The terminal box 30 further comprises a first lateral surface 381 which is formed perpendicular to the front surface 36. The terminal box 30 further comprises a second lateral surface 382 which is arranged parallel to the first lateral surface 381. The connection element 321 is formed in or on the first lateral surface 381. Similarly, the other connection element 322 is formed in or on the second lateral surface 382.

[0043] The connection element 321 is larger than the other connection element 322. Similarly, the counterpart 321’ is larger than the other counterpart 322’. The counterpart 321’ of the connection element 321 can be moved along a connection direction or axis C to establish an electrical connection, likewise the other counterpart 322’ of the other connection element 322 can be moved along the other connection direction or axis C’.

[0044] The connection direction or axis C and the other connection direction or axis C’ are arranged parallel to each other. Furthermore, the connection direction or axis C has a first distance to the rotation axis R, while the other connection direction or axis C’ has a second distance to the rotation axis R, the first distance not being equal to the second distance. Neither the connection direction or axis C nor the other connection direction or axis C’ comprise a crossing point with the rotation axis R. In other words, the connection direction or axis C and the rotation axis R are offset or skewed. Likewise, the other connection direction or axis C’ and the rotation axis R are also offset or skewed. However, it is also conceivable that the connection direction or axis C and the other connection direction or axis C’ are arranged coaxially.

[0045] The figures represent one or more embodiments in which the connection element 321 and the other connection element 322 are located on different (or opposite) sides of the terminal box; however, according to the present invention, it is also conceivable to arrange the connection element 321 and the other connection element 322 on the same side of the terminal box.

[0046] Figure 2aA first embodiment of the utility model circulation pump 1 is shown schematically and exemplarily in a first perspective view, the circulation pump 1 having a connecting element 321 and a further connecting element 322, wherein a counterpart 321' of the connecting element 321 and a further counterpart 322' of the further connecting element 322 are inserted or respectively connected to the connecting element 321 and the further connecting element 322. The terminal box 30 comprises a rear surface 36', which is formed perpendicular to the rotation axis R and parallel to the front surface 36, which rear surface 36' faces towards the motor housing 20, wherein the rear surface 36' comprises a locking element 39 for positioning and / or fixing the counterpart 321'. The rear surface 36' further comprises a further locking element 39', as is more clearly shown in Figure 1a The locking element 39 and the further locking element 39' are formed wedge-shaped.

[0047] The counterpart 321' comprises a connecting portion 321" and the further counterpart 322' comprises a further connecting portion 322". Both connecting portions 321", 322" ensure that an undesired pulling out or disconnection occurs when the circulation pump 1 is in operation. To this end, the connecting portions 321", 322" mechanically interact with their corresponding locking elements 39, 39'. Both the locking element 39 and the further locking element 39' protrude towards the motor housing 20.

[0048] Figure 2b A first embodiment of the utility model circulation pump 1 is shown schematically and exemplarily in a first perspective view, the circulation pump 1 having a connecting element 321 and a further connecting element 322, wherein a counterpart 321' of the connecting element 321 and a further counterpart 322' of the further connecting element 322 are inserted or respectively connected to the connecting element 321 and the further connecting element 322. The terminal box 30 comprises a rear surface 36', which is formed perpendicular to the rotation axis R and parallel to the front surface 36, which rear surface 36' faces towards the motor housing 20, wherein the rear surface 36' comprises a locking element 39 for positioning and / or fixing the counterpart 321'. The rear surface 36' further comprises a further locking element 39', as is more clearly shown in Figure 2a

[0049] Figure 3a A second embodiment of the utility model circulation pump 1 is shown schematically and exemplarily in a top view, the circulation pump 1 having two means 40 for guiding the electrical cable 41, both means 40 being formed in the terminal box 30 of the pump 1. According to the embodiment in Figure 3a , both means 40 are formed as grooves 40. Furthermore, the means 40 comprise an element for fixing, which element is formed as a narrowing of the cross-section of the groove 40. In other words, the dimension of the groove 40 parallel to the rotation axis R is slightly smaller than the diameter of the electrical cable 41 Figure 3c that can be pushed into the groove 40. Thus, the electrical cable 41 can advantageously be fixed and the risk of an undesired pulling out of the electrical cable 41 is reduced.

[0050] The two means or grooves 40 according to the second embodiment are spaced apart along the rotation axis R. Furthermore, the grooves 40 have different depths, which are defined as the dimensions or lengths perpendicular to the rotation axis R, respectively, and which extend from a deepest point 401 of the respective groove 40 to a point arranged in the outer extension of the first lateral surface 381 or the second lateral surface 382, respectively.

[0051] Figure 3b ​A second embodiment of the circulation pump 1 is shown schematically in a third perspective view. The recess 40 is configured in the terminal block 30, in which Figure 3b Only one recess is visible in the

[0052] Figure 3c A second embodiment of the circulation pump 1 is shown schematically in a fourth perspective view, the circulation pump 1 having a counterpart 321' connected to a connection element 321 and another counterpart 322' connected to another connection element 322. As shown in Figure 3c , the cable 41 of the counterpart 321' is guided by the recess 40. Likewise, the cable 41' of the other counterpart 322' is guided by another recess 40 not visible in Figure 3c .

[0053] Reference signs

[0054] 1 circulation pump

[0055] 10 pump housing

[0056] 14 inflow pipe

[0057] 14' inflow direction

[0058] 16 outflow pipe

[0059] 16' outflow direction

[0060] 20 motor housing

[0061] 30 terminal block

[0062] 36 front surface

[0063] 36' rear surface

[0064] 39 locking element

[0065] 39' other locking element

[0066] 40 means for guiding a cable, recess

[0067] 41 cable

[0068] 321 connection element

[0069] 321' counterpart

[0070] 321" connection part

[0071] 322 other connection element

[0072] 322' other counterpart

[0073] 322" other connection element

[0074] 381 first lateral surface

[0075] 382 second lateral surface

[0076] 401 deepest point of the recess

[0077] C connecting direction or axis

[0078] C’ another connecting direction or axis

[0079] R rotation axis

Claims

1. A circulating pump (1), comprising: --The pump housing (10) includes an impeller that is rotatable about the rotation axis (R) of the pump (1). --Includes a motor housing (20) with an electric motor, the electric motor being coaxially connected to and driving the impeller. -- Junction box (30), It includes electrical and / or electronic components for controlling the electric motor, and A connecting element (321) having an electrical connection for establishing the junction box (30), The electric motor is arranged between the pump housing (10) and the junction box (30). The characteristic feature is that the connecting element (321) is formed to define a connection direction or axis (C) perpendicular to the rotation axis (R), and in order to establish the electrical connection, the mating portion (321') of the connecting element (321) needs to move along the connection direction or axis (C).

2. The circulating pump (1) according to claim 1, characterized in that, The connection direction or axis (C) and the rotation axis (R) are skewed and / or do not include an intersection.

3. The circulating pump (1) according to claim 1, characterized in that, Includes an inlet pipe (14) and an outlet pipe (16), The inflow pipe (14) defines the inflow direction (14'). The outflow pipe (16) defines the outflow direction (16'). The inflow direction (14') and outflow direction (16') are at least partially perpendicular to the rotation axis (R). The connecting element (321) of the junction box (30) is formed particularly near the outlet pipe (16) of the pump (1).

4. The circulating pump (1) according to any one of the preceding claims, characterized in that, The junction box (30) includes a front surface (36) formed perpendicular to the axis of rotation (R), the front surface (36) facing away from the pump housing (20), wherein the junction box (30) also includes a first lateral surface (381) formed perpendicular to the front surface (36), wherein the connecting element (321) is formed in or on the first lateral surface (381).

5. The circulating pump (1) according to claim 4, characterized in that, Another connecting element (322) is formed to define another connecting direction or axis (C') perpendicular to the axis of rotation (R), and in order to establish another electrical connection, another mating part (322') needs to move along the other connecting direction or axis (C'), wherein the other connecting direction or axis (C') is preferably arranged coaxially with the connecting direction or axis (C).

6. The circulating pump (1) according to any one of the preceding claims, characterized in that, The junction box (30) includes a rear surface (36') formed perpendicular to the axis of rotation (R) and parallel to the front surface (36), the rear surface (36') facing toward the motor housing (20), wherein the rear surface (36') includes a locking element (39) for positioning and / or securing the mating part (321).

7. The circulating pump (1) according to claim 6, characterized in that, At least a portion of the locking element (39) protrudes toward the motor housing (20).

8. The circulating pump (1) according to any one of the preceding claims, characterized in that, The connecting element (321) is a plug or corresponds to a plug, and the mating portion (321') of the connecting element (321) is a socket or corresponds to a socket, or vice versa, and / or, the other connecting element (322) is a plug or corresponds to a plug, and the other mating portion (322') of the other connecting element (322) is a socket or corresponds to a socket, or vice versa.

9. The circulating pump (1) according to any one of the foregoing claims, characterized in that, It also includes a device (40) for guiding the cable of the mating part (321') and / or the other mating part (322'), the guiding device (40) preferably being formed as a groove.

10. The circulating pump (1) according to any one of the preceding claims, characterized in that, It also includes elements for securing the cable of the mating part (321') and / or the other mating part (322'), wherein, preferably, the means for guiding the cable includes the elements for securing it.

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