Temperature control pump with an enclosed rotor block and manufacturing process thereof

Abstract

A pump comprises a stator (1) and a rotor (2), wherein the rotor (2) has a rotor body (3) and a rotor block (4) and is rotatably mounted about an axis of rotation (A). The rotor block (4) has a metallic rotor core (22) and magnets (13). The rotor body (3) comprises a block housing (17), wherein the block housing (17) at least partially encloses and holds the magnets (13) radially. The rotor block (4) has magnet holders (14), wherein the magnet holders (14) hold the magnets (13) tangentially. The magnet holders (14) hold the magnets (13) radially on the rotor core (22).

Description

[0001] The invention relates to a pump for driving a fluid, preferably a temperature control medium, wherein the pump comprises a stator and a rotor, wherein the rotor has a rotor body and a rotor block and is mounted so as to be rotatable about a rotation axis, wherein the rotor block comprises a metallic rotor core and magnets, wherein the rotor body comprises a block housing, wherein the block housing at least partially encloses the magnets in the radial direction and holds them in the radial direction, wherein the rotor block comprises magnet holders, wherein the magnet holders hold the magnets in the tangential direction, wherein the magnet holders hold the magnets in the radial direction on the rotor core. The invention further relates to a method for producing a rotor of such a pump.

[0002] It is well known from the prior art to precisely attach magnets or permanent magnets to the outer circumference of the rotor core using adhesive. However, this is a complex method of attachment, as the adhesive requires some time to cure, and the magnet must be held in place during this time. This is all the more true because already attached magnets induce stronger repulsive or attractive forces and can move the newly applied magnet out of position. Even minor inaccuracies in positioning can impair electromagnetic efficiency and also create imbalance.

[0003] DE 10 2010 037 061 A1 discloses a coolant pump for a vehicle with an internal combustion engine, comprising an external stator and an internal rotor. The rotor has a rotor block and a rotor body. The rotor block comprises a rotor core or a rotor stack and magnets arranged on the outside of the rotor stack, thus representing the electromagnetically relevant part of the rotor. For this purpose, axially extending magnet holders with an approximately rectangular cross-section are formed on the outer sides of the rotor stack, which hold the magnets in their respective tangential positions.

[0004] The rotor body from DE 10 2010 037 061 A1 comprises the other components of the rotor, which include in particular a solid shaft and a block housing. The block housing encloses the magnets and is arranged in a drive chamber of the pump. To protect against fluid penetrating the drive chamber, the rotor block is completely enclosed by the block housing. The block housing has a base and a cover made of stainless steel as well as a roughly hollow-cylindrical plastic housing shell. The base and the cover are prefabricated elements that hold the magnets in the axial and radial directions, thus making the use of adhesive obsolete. In this state, the rotor block is overmolded, so that the housing shell is created by overmolding with the help of a shell mold and has a cylindrical surface.

[0005] The energy and mobility transition requires the development of new technologies, particularly electric vehicles with a drive battery and an electric motor. Drive batteries achieve their greatest efficiency at temperatures around 20°C, so they must be heated or cooled depending on the situation. Heating is particularly useful shortly after starting in winter, while cooling is primarily considered after the vehicle has been running for a while. In this respect, the thermal management of the drive train in electric vehicles differs from that of combustion vehicles, especially during the cold season. Ultimately, the entire component chain (pipes, quick connectors, pumps, battery housings, etc.) of the thermal management system in electric vehicles must be designed to operate in the cold season as well, and thus without the assistance of airflow.

[0006] This means that, over the course of a year, a relatively high throughput of the electric vehicle's temperature control fluid is required. Consequently, the pump must be designed to be correspondingly powerful. The invention is therefore based on the object of making the pumps for thermal management more efficient. The invention is preferably based on the object of increasing performance without compromising manufacturing costs or material usage.

[0007] This object or objects is / are achieved by a pump for driving a fluid, preferably a temperature control medium, in particular for use in a vehicle, especially for use in controlling the temperature of a drive battery of an electric vehicle, wherein the pump comprises a stator and a rotor, wherein the rotor has a rotor body and a rotor block and is mounted rotatably about a rotation axis, wherein the rotor block comprises a metallic rotor core and magnets, wherein the rotor body comprises a block housing, wherein the block housing at least partially encloses the magnets in the radial direction and holds them in the radial direction, wherein the rotor block comprises magnet holders, wherein the magnet holders hold the magnets in the tangential direction, wherein the magnet holders hold the magnets in the radial direction on the rotor core.

[0008] The invention is based on the recognition that the prior art overmolding process is critical. This is because the polymer melt does not form a material bond with the metal base and the metal cover of the block housing. Consequently, the melt must be pressed into the shell mold under very high pressure to fill as many of the small cavities as possible between the rotor core and the cover or base.

[0009] In particular, it was discovered that securing the magnets in the radial direction by the magnet holders eliminates the need for the base and cover of the block housing, as used in the prior art, to radially hold the magnets in preparation or pre-fixation for overmolding. Thus, the task of radially pre-fixing the magnets is transferred from the rotor body to the rotor block.

[0010] The invention is based, in particular, on the finding that radially holding magnet holders offer entirely new possibilities for housing the rotor block. Above all, this makes it possible to completely overmold the rotor block. In particular, there is no longer any need for the polymer melt to penetrate the small cavities formed by the base and cover. This improves the watertightness of the rotor body and reduces the likelihood of rejects or repairs. As a result, the performance, especially the service life of the pump, is increased, and the aforementioned problem is solved.

[0011] The invention is further based on the finding that assembly of the rotor block is significantly simplified. Thanks to the radial mounting, the magnets no longer all need to be held radially simultaneously while the housing base and cover are being secured. This simultaneous mounting is extremely difficult and correspondingly time-consuming, particularly due to the aforementioned magnetic forces. Thanks to the radially holding magnet holders, the magnets can be arranged individually in the designated locations without the need for manual or mechanical mounting until the overmolding process. As a result, the invention achieves the aforementioned objective.

[0012] It is preferred that the rotation axis A defines an axial, a radial and / or a tangential or circumferential direction. The expression “radially inward” means the radial direction towards the rotation axis A. The term “axially inward” means the axial direction that corresponds to the direction of the fluid flowing in the inlet. In particular, “axially inward” means an axial direction from the impeller towards the rotor block. The axially outermost section of the pump is preferably also the uppermost section of the pump. The end of the pump axially opposite the uppermost section is the lowermost section or the lower end. In a plan view, the tangential directions can run either clockwise or counterclockwise. The rotor preferably rotates clockwise.

[0013] The magnets are preferably permanent magnets. The rotor or rotor block preferably comprises at least six or eight magnets in a cross-section. The rotor or rotor block advantageously comprises a maximum of 20, 16 or 14 magnets in cross-section. The rotor core is advantageously circular-arc-shaped at least in sections along its circumference. The rotor core preferably comprises magnet locations on its radial outer side for arranging one magnet at a time. It is very preferred that the magnets are circular-arc-shaped on their radial inner side and / or on their radial outer side when viewed in plan view or in cross-section. It is advantageous that the magnet locations have a circular-arc-shaped contour in plan view or in cross-section and in particular have a surface complementary to the magnets.

[0014] It is highly preferred that the rotor core has a plurality of laminations, in particular rotor laminations, stacked one above the other. The rotor laminations are preferably electrical laminations. It is highly preferred that the rotor core comprises at least 10, 15, or 20 laminations or rotor laminations. It is advantageous that the rotor core has a maximum of 50, 40, or 30 rotor laminations. Advantageously, a plurality of laminations or rotor laminations are aligned over a complete revolution. The laminations / rotor laminations can be joined to one another to form the rotor core by means of stamped stacking or by means of baked varnish. It is advantageous that the rotor laminations are provided with an insulating coating.

[0015] According to a particularly preferred embodiment, the pump is designed such that the fluid flows around the block housing of the rotor body during pumping operation. This allows a secondary flow from the wheel chamber or a wheel chamber into the drive chamber(s). Via return channels or a return channel, the secondary flow of fluid can then flow through the rotor in an axially outward direction back into the wheel chamber. As a result, the secondary flow carries away the heat from the stator, the rotor, and / or a circuit board, thereby cooling the pump and allowing it to operate more efficiently overall.

[0016] According to a particularly preferred embodiment, the rotor body or the block housing comprises a plastic. The rotor body or the block housing is advantageously formed in one piece and preferably integrally. If the rotor body is manufactured integrally, for example by injection molding or overmolding, then the rotor body is lightweight yet very robust. This allows a large number of details to be implemented on the rotor body, of which return channels and blades are particularly noteworthy. As a result, the rotor body can be manufactured inexpensively, even though it contains a considerable number of technical details. At the same time, the rotor body of an integral construction is characterized by a correspondingly high level of robustness, which allows it to be constructed with relatively thin walls. This also applies analogously to the block housing.

[0017] The rotor expediently comprises a pump impeller and / or a shaft. The pump impeller advantageously has a rotor plate and / or blades and / or a rotor cover. The rotor plate is expediently arranged axially inwardly of the blades. In a plan view, the blades preferably define blade channels between them. It is possible for the blades to be covered in the axially outward direction by a rotor cover. The rotor cover can be attached to the blades, in particular by plugging or welding.

[0018] It is highly preferred that the rotor body comprises the blades and / or the wheel disc and / or the shaft. The shaft advantageously has a drive section and / or a connecting section. The drive section and the block housing expediently overlap in the axial direction. According to a particularly preferred embodiment, the block housing, the drive section, the connecting section of the wheel discs and / or the blades are integrally connected to one another and preferably form the rotor body.

[0019] According to a particularly preferred embodiment, the block housing at least partially and preferably completely encloses the rotor block in the axial and / or radial and / or tangential direction. It is particularly preferred that the block housing completely covers a radial outer side, a radial inner side, a lower axial side, and / or an upper axial side of the rotor block. It is highly preferred that the block housing is manufactured by overmolding the rotor block. This makes the block housing particularly reliably watertight, resulting in low reject rates and a long service life for the rotor or pump.

[0020] It is highly preferred that the magnet holders clamp the magnets to the rotor core—particularly radially and / or tangentially. This ensures reliable pre-assembly, requiring fewer precautions in the production process. This simplifies manufacturing overall. This applies both to the conventional state of the art (permanently adhesive magnets) and to the printed state of the art mentioned above. It is advantageous that the magnet holders are elastically movable—preferably in a tangential direction.

[0021] A magnet holder preferably comprises two holder arms. It is preferred that the two holder arms have an arm gap between them in the tangential direction, which advantageously ensures elasticity of the two holder arms. Advantageously, the magnet holder or holder arm comprises at least one holder projection. The holder projection is expediently arranged at a free end or at a radially outward end of one or each holder arm and preferably projects in the tangential direction. Advantageously, both holder arms have a holder projection. It is very preferred that a radial extension between a magnet location and a holder projection corresponds to a radial extension of a magnet. The two holder arms can open into a common holder base, which projects in the radial direction relative to the rotor core.

[0022] It is preferred that each magnet is held by at least two or at least four magnet holders or holder arms. It is advantageous if one magnet holder—preferably with two holder arms—holds two adjacently arranged magnets. This keeps the overall amount of holding material as low as possible, allowing for the smallest possible disturbance to the electromagnetic environment. According to one embodiment, a magnet is held by exactly four magnet holders. Preferably, each tangential side of a magnet is assigned an upper and a lower magnet holder or holder arm.

[0023] According to one embodiment, a magnet holder extends in the axial direction across a plurality of laminations or rotor sheets. It is possible for each magnet to comprise only one magnet holder, in particular an axially extended magnet holder, on each tangential side. It is possible for the axially extended magnet holders to comprise a plastic. Preferably, the rotor core comprises holder grooves which extend in the axial direction with their longitudinal extent. The axially extended magnet holders can engage in the holder grooves with radially inwardly arranged projections, in particular in a dovetail shape, and can be fastened in the rotor core. The axially extended magnet holders can comprise a plastic, in particular.

[0024] The rotor core advantageously comprises a plurality of block laminations, an upper holder lamination, a lower holder lamination, an upper cover lamination, and / or a lower cover lamination. The block laminations, the upper holder lamination, the lower holder lamination, the upper cover lamination, and / or the lower cover lamination are preferably electrical steel sheets. The block laminations advantageously have the same shape. It is preferred that the rotor core has at least 3, 5, 8, or 10 block laminations. Conveniently, the rotor core comprises at least half block laminations.

[0025] The rotor block advantageously has an axial holder for axially holding the magnets on the rotor core. The axial holder is preferably designed as an axial stop. It is highly preferred that the axial holder is arranged at a lower and / or upper end of the rotor core. The axial holder or axial stop expediently protrudes radially relative to one or more adjacent laminations or rotor sheets. It is preferred that each magnet position is assigned an axial holder or axial stop. This allows for reliable pre-assembly, so that fewer precautions are required in the production process and reduces manufacturing costs.

[0026] The axial holder is preferably an integral component of a lamination, and in particular of the lower and / or upper cover lamination. The lower / upper cover lamination can be the lowest / uppermost lamination of the rotor core. The lower or upper cover lamination can comprise a material other than electrical steel sheet and be made of a different material than the block laminations.

[0027] It is preferred that the magnet holders are made of a different material than the block housing, and in particular of metal. Magnet holders made of a material other than plastic are advantageous because they are not softened during subsequent overmolding, thus preventing displacement of the magnets during overmolding. It is preferred that the magnet holders are made of a different material than the block housing, and in particular of metal. The magnet holders are preferably integrally connected to the rotor core or to a lamination / electrical steel sheet or to laminations / electrical steel sheets. It is very preferred that upper magnet holders are assigned to / the upper holder lamination. The upper or lower holder lamination preferably has the same shape as the block laminations and preferably also the magnet holders. The holder laminations and / or the block laminations are expediently produced by stamping.Preferably, the lower magnet holders are connected—in particular integrally—to a lower holder plate. The lower holder plate advantageously has the same shape as the upper holder plate. The integral connection of the magnet holders to the rotor core results in high stability of the rotor block.

[0028] Advantageously, the rotor core or the magnet holders comprise recesses to prevent scratches or splinters on magnet edges. It is preferred that, in a plan view of the rotor core, the rotor core has grooves whose longitudinal extent extends in the axial direction. The grooves are preferably arranged on both tangential sides of the magnet positions. As a result, the grooves protect the radially inner magnet edges extending in the axial direction. Preferably, the magnet holders comprise inner angular recesses. The inner angular recesses widen an angle between a holder arm and a radial outer side of the rotor core. This protects the radially inner magnet edges that extend in the axial direction. Advantageously, the magnet holders comprise outer angular recesses. The outer angular recesses preferably enlarge an angle between a holder arm and a holder projection.This protects a radially outer magnetic edge which extends in the axial direction.

[0029] The object stated at the outset is achieved by a method for producing a rotor for a pump, in particular a pump according to the invention, wherein a rotor has a rotor block and a pump wheel, wherein the rotor block comprises a metallic rotor core, magnets and magnet holders, wherein the magnets are positioned and held on a radial outer side of the rotor core - preferably in a tangential direction - with the aid of the magnet holders, wherein the rotor block is housed by means of overmolding on its radial outer side, so that a block housing is created, characterized in that the rotor block is overmolding on at least one axial outer side by means of overmolding, wherein the block housing extends onto at least one axial outer side of the rotor block.

[0030] According to a particularly preferred embodiment, the magnets are pushed in the axial direction and positioned in the radial direction between the magnet holders or holder projections and the rotor core. Advantageously, the magnets are pushed in until they abut the axial stops in the axial direction. Advantageously, the rotor block is overmolded after the magnets have been arranged on the rotor core, thus creating the block housing or rotor body.

[0031] The invention is explained below using an exemplary embodiment with two figures. They show a schematic representation Fig. 1 a longitudinal section through a pump according to the invention and Fig. 2 a perspective view of a rotor block of the pump from Fig. 1.

[0032] A pump according to the invention expediently comprises an inlet 8 and an outlet 9, shown in dashed lines due to the selected longitudinal section. The pump has a rotor 2, which expediently comprises an impeller 6. The pump has a stator 1, which drives a rotor block 4. The rotor block 4 is a component of the rotor 2. The rotor 2 expediently comprises a shaft 7, which transmits the torque of the rotor block 4 to the impeller 6. The impeller 6 preferably comprises blades 19 and / or an impeller plate 31.

[0033] The blades 19 propel the fluid flowing in through the inlet 8 radially outward, where it is conveniently collected by a collecting channel 28 along almost its entire circumference. The collecting channel 28 conveniently opens into the outlet 9. In this embodiment, the fluid flow from the inlet 8 via the impeller 6 into the collecting channel 28 to the outlet 9 is the main fluid flow. The chain of elements 8, 6, 28, 9 forms a main flow path.

[0034] The pump preferably comprises a partition wall 16 and a housing 15. It is highly preferred that the partition wall 16 separates a space within the housing 15 into a dry area and a wet area. The stator 1 is preferably arranged in the dry area. Advantageously, the pump comprises a circuit board 18 for controlling the pump operation and, in particular, for controlling the stator 1. It is preferred that the circuit board 18 be located in the dry area of ​​the pump.

[0035] The wet area of ​​the pump preferably comprises the inlet 8 and the outlet 9. It is preferred that the wet area has a wheel chamber 10 within which the pump wheel 6 is arranged. A drive chamber 11, which is advantageously formed by the partition wall 16, adjoins the wheel chamber 10 in the axially inward direction or downwards in longitudinal section. It is highly preferred that the rotor block 4 be arranged within the drive chamber 11.

[0036] Advantageously, a circumferential gap is located between the partition wall 16 and the wheel plate 31 or the pump wheel 6, through which the fluid can flow from the wheel chamber 10 into the drive chamber 11. It is highly preferred that the rotor 2 has at least one return channel 12 and preferably a plurality of return channels 12, which extend approximately axially within the rotor 2 and connect a lowermost region of the drive chamber 11 to the wheel chamber 10.

[0037] Due to the pressure difference between the radial inside and radial outside created by the impeller 6, a small portion of the fluid—the secondary flow—flows from the wheel chamber 10 into the drive chamber 11 and from there past the rotor block 4 to the lowest region of the drive chamber 11. The secondary flow then enters a lower inlet of the return channel 12(s), flows through the rotor 2, and finally exits at the top in a radially inner region of the wheel chamber 10. There, the secondary flow mixes with the main flow.

[0038] The secondary current has the advantage of dissipating heat from the stator 1, the rotor block 4, and the circuit board 18, allowing the pump to operate more efficiently overall. However, this also means that the rotor block 4 is located within a wet area, and corresponding technical requirements must be placed on the rotor block 4 and the rotor 2, respectively.

[0039] The rotor 2 of this exemplary embodiment comprises a rotor body 3, which is preferably made of a plastic material. The rotor body 3 can have the blades 19, the wheel plate 31, the shaft 7, the return channels 12, and / or a block housing 17. In this exemplary embodiment, the rotor body 3 is manufactured by injection molding or by overmolding the rotor block 4. The block housing 17 of this exemplary embodiment completely encloses the rotor block 4 with the magnets 13 and the rotor core 22. This ensures very good protection of the rotor block 4 from the secondary current. At the same time, the overmolding makes it possible to create very smooth outer surfaces of the rotor 2 or the rotor body 3, so that the rotor 2 rotating in the fluid has good fluid dynamic properties.

[0040] In this exemplary embodiment, an axle 23 is mounted in a rotationally fixed manner in a base of the partition wall 16. The axle 23 defines a rotation axis A around which the rotor 2 rotates. The rotor 2 can advantageously have a pivot bearing 5, which can be optimized from a tribological point of view and may in particular comprise graphite. The pump preferably comprises an axle holder 24, which in this exemplary embodiment is pressed into a receptacle of a spider. Consequently, an upper, axial end face of the pivot bearing 5 rotates relative to a lower, axial end face of the axle bearing 24. It is very preferred that the rotor body 3 be produced by overmolding the pivot bearing 5 and the rotor block 4. The rotor 2 can have a rotor cover 25, which is preferably placed onto the blades 19. A rotor cap can be arranged at a lower end of the motor 2, which is preferably only attached to the rotor 2 after overmolding.

[0041] In this exemplary embodiment, the block housing 17 is integrally connected to the shaft 7 of the rotor 2 or the rotor body 3, and preferably integrally connected to the impeller disk 31 and / or the blades 19 of the impeller. This integral connection is preferably achieved by overmolding the rotor block 4.

[0042] In Fig. Figure 2 shows a detailed perspective view of the rotor block 4. It can be seen that the magnets 13 are preferably arranged on a radial outer side of the rotor core 22. For this purpose, the rotor block 4 comprises magnet holders 14, which hold the magnets 13 to the rotor core 22. By securing the magnets 13 to the rotor core 22, the rotor block 4 is sufficiently stable overall for subsequent overmolding.

[0043] The rotor core 22 of this exemplary embodiment consists of 25 stacked laminations 20, 21, 27. The laminations 20, 21, 27 are preferably electrical steel sheets. The electrical steel sheets are expediently provided with an insulating coating to prevent eddy currents—particularly in the axial direction. The laminations 20, 21, 27 of this initial example can be connected to one another by means of stamped stacking or by means of baked enamel to form the continuous rotor core 22. In this exemplary embodiment, the rotor core 22 has exactly twenty-two block laminations 20 made of electrical steel sheets, each of which has the same shape.

[0044] The rotor block 4 of this embodiment comprises a total of ten magnets 13, which are preferably designed as permanent magnets. For the sake of clarity, Fig.2, however, only five magnets 13 are shown. It is preferred that the magnets 13 be circularly arcuate on their radial inner side and / or on their radial outer side in a plan view of the rotor block. Advantageously, the rotor core 22 has ten magnet locations 30 on its radial outer side in this exemplary embodiment, with each magnet location 30 being assigned to a magnet 13. Preferably, the magnet holders 14 or magnet locations 30 or magnets 13 are arranged equidistant from one another in the tangential direction.

[0045] In this exemplary embodiment, the lowermost lamella is designed as a lower cover lamella 27b. The lower cover lamella can comprise an electrical steel sheet or a plastic. The lower cover lamella 27b preferably comprises a plurality of axial holders 29, and in this exemplary embodiment, ten. Each axial holder 29 is expediently assigned to a magnet location 30. The axial holders 29 are preferably designed as axial stops, so that the magnets 13 are securely held on the rotor core 22 in the axial direction downwards. The rotor core may have an upper cover lamella 27a, which is preferably designed as a block lamella 20. It is possible for the lower cover lamella 27b to be located above the upper cover lamella 27a after assembly of the pump, so that the directional convention of the lamellas can deviate from the above directional convention of the pump.

[0046] According to a particularly preferred embodiment, the rotor core 22 comprises two holder laminations 21, or an upper holder lamination 21 and a lower holder lamination 21. The two holder laminations 21 of this exemplary embodiment preferably have a plurality of magnet holders 14, each preferably having a number corresponding to the number of magnets. It is preferred that the magnet holders 14 are an integral component of the holder lamination(s) 21. The magnet holders 14 or the holder lamination(s) 21 are preferably produced by stamping. It is advantageous that the holder lamination 21 is arranged in an upper half, an upper third, or an upper quarter of the rotor core 22. The lower holder lamination 21 is expediently arranged in a lower half, a lower third, or a lower quarter of the rotor core 22.

[0047] In this embodiment, the magnet holders 14 preferably each comprise two holder arms 14b. It is preferred that the holder arms 14b be elastically movable in the tangential direction. Particularly preferably, the magnet holders 14 or the holder arms 14b exert a clamping force on the magnets 13 in the tangential direction. Advantageously, the two holder arms 14b are spaced apart from each other in the tangential direction by an arm gap 14f.

[0048] Advantageously, the magnet holders 14 or the holder arms 14b each comprise at least one holder projection 14c. The holder projection 14c expediently extends in a tangential direction or preferably protrudes in a tangential direction, so that the magnets 13 are held in the radial direction on the rotor core 22.

[0049] The magnet holders 14 or the holder arms 14b advantageously comprise inner angular recesses 14d and / or outer angular recesses 14e. This prevents axially extending edges of the magnets 13 from coming into contact with the magnet holders 14. This is advantageous because the magnets 13 are usually made of a very brittle or sensitive material.

[0050] It is preferred that the rotor core 22 comprises grooves 26. The grooves 26 are preferably arranged on a radial outer side of the rotor core 22. Advantageously, the longitudinal extent of the grooves 26 runs in the axial direction. The grooves 26 are designed such that radially inner edges of the magnets 13 with an axially extending longitudinal extent do not come into contact with the rotor core 22 when the magnets 13 are inserted into the magnet positions 30. This protects the magnets 13, reduces waste, and simplifies the manufacturing effort overall. The grooves 26 are expediently arranged in the tangential direction directly next to the magnet holders 14. Preferably, two grooves 26 are assigned to each magnet holder 14. List of reference symbols A rotation axis 1 stator 2 rotors 3 rotor bodies 4 Rotor block 5 pivot bearings 6 Pump wheel 7 Wave 8 Entrance 9 Outlet 10 wheel chamber 11 Drive chamber 12 return channels 13 magnets 14 magnetic holders 14a Holder base 14b Holder arm 14c holder projection 14d inner angle recess 14e outer angle recess 14f arm gap 15 housings 16 Partition wall 17 block housings of 2, 3 18 circuit boards 19 shovel of 6 20 block slats 21 Holder slat 22 Rotor core 23 Axis 24 axle bracket 25 wheel covers of 2 26 grooves 27a Upper cover lamella 27b Lower cover lamella 28 Collecting channel 29 Axial holder 30 magnet space 31 wheel plates QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions. Cited patent literature

[0000] DE 10 2010 037 061 A1 [0003, 0004]

Claims

[1] Pump for driving a fluid, preferably a temperature control medium, in particular for use in a vehicle, especially for use in tempering a drive battery of an electric vehicle, wherein the pump comprises a stator (1) and a rotor (2), wherein the rotor (2) has a rotor body (3) and a rotor block (4) and is rotatably mounted about a rotation axis (A), wherein the rotor block (4) comprises a metallic rotor core (22) and magnets (13), wherein the rotor body (3) comprises a block housing (17), wherein the block housing (17) at least partially encloses the magnets (13) in the radial direction and holds them in the radial direction, wherein the rotor block (4) comprises magnet holders (14), wherein the magnet holders (14) hold the magnets (13) in the tangential direction, characterized by , that the magnet holders (14) hold the magnets (13) in the radial direction on the rotor core (22). [2] Pump according to claim 1, wherein the pump is designed such that the fluid flows around the block housing (17) of the rotor body (3) during pumping operation. [3] Pump according to claim 1 or 2, wherein the rotor body (3) or the block housing (17) comprises a plastic, wherein the rotor body (3) or the block housing (17) is preferably formed in one piece and more preferably integrally. [4] Pump according to one of claims 1 to 3, wherein the block housing (17) at least partially encloses the rotor block (4) in the axial direction. [5] Pump according to one of claims 1 to 4, wherein the magnet holders (14) hold the magnets (13) in a clamping manner - in particular radially and / or tangentially clamping - on the rotor core (22). [6] Pump according to one of claims 1 to 5, wherein a magnet (13) is held by at least two or at least four magnet holders (14), wherein preferably one magnet holder (14) holds two magnets (13) arranged next to one another. [7] Pump according to one of claims 1 to 6, wherein the rotor block (4) has an axial holder (29) for axially holding the magnets (13) on the rotor core (22), wherein the axial holder (29) is preferably designed as an axial stop. [8] Pump according to one of claims 1 to 7, wherein the magnet holders (14) comprise a different material than the block housing (17) and in particular a metal, wherein the magnet holders (14) are preferably integrally connected to the rotor core (22). [9] Pump according to one of claims 1 to 8, wherein the rotor block (4) or the rotor core (22) or the magnet holders (14) comprise or comprise recesses (26, 14d, 14e) to avoid scratches on magnet edges. [10] Method for producing a rotor for a pump, in particular a pump according to one of claims 1 to 9, wherein a rotor (2) has a rotor block (4) and a pump wheel (6), wherein the rotor block (4) comprises a metallic rotor core (22), magnets (13) and magnet holders (14), wherein the magnets (13) are positioned and held by means of the magnet holders (14) on a radial outer side of the rotor core (22) - preferably in a tangential direction -, wherein the rotor block (4) is encased by means of overmolding on its radial outer side, so that a block housing (17) is created, characterized by that the rotor block (4) is overmolded on at least one axial outer side, wherein the block housing (17) extends onto at least one axial outer side of the rotor block (4).

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