WO2019057430A1

WO2019057430A1 - Pump device with a contacting element

Info

Publication number: WO2019057430A1
Application number: PCT/EP2018/072626
Authority: WO
Inventors: Sebastian Hansen; Roland Schmidt; Manfred Burkart
Original assignee: Robert Bosch Gmbh
Priority date: 2017-09-22
Filing date: 2018-08-22
Publication date: 2019-03-28
Also published as: CN111108667A; DE102017216807A1; CN111108667B

Abstract

The invention relates to a pump device, in particular a motor vehicle pump device for supplying liquids, and a contacting element for such a pump device. According to the invention, the pump device comprises an electric drive with a stator and a rotor, and the pump device also comprises a pump housing, in which an impeller wheel that can be driven by the rotor and the rotor are arranged. The pump device additionally has a motor housing, in which the stator is arranged, an electronic actuation unit which comprises a printed circuit board, and at least one contacting element for mechanically and/or electrically contacting the stator with the electronic actuation unit. The contacting element further has a insulation-piercing terminal section and a press-in section. The contacting element is connected to the motor housing in a formfitting manner in the region of the press-in section, in particular the contacting element is designed so as to be injected into the motor housing.

Description

Description title

Pump device with a contact element

The invention relates to a pump device with a contact element according to the preamble of the independent claims.

State of the art

From the prior art pumping devices, in particular

Cooling circuit pumps for motor vehicles in various embodiments known. The cooling circuit may, for example, a drive motor, a charge air heat exchanger, a battery and / or a control unit of the motor vehicle to cool. Known pumping devices typically include a hydraulic portion disposed in a pump housing and an electrical portion disposed within a motor housing and are often used to convey a cooling fluid in a cooling circuit. The motor housing defines a drying space provided by a stator of an electronically commutated DC motor and its

Control electronics, which includes a circuit board is filled.

Pump devices from the prior art also have contacting elements, which electrically and / or mechanically connect the stator to the control electronics. The contact elements known from the prior art are usually integrated in the cold contact in bulk or floating in the composite. The production and assembly of such Kontaktierelemente is usually mechanically complex, time-consuming and expensive. Disclosure of the invention

ADVANTAGES OF THE INVENTION The invention is based on a pump device, in particular a pump device

Motor vehicle pump device for conveying liquids and a

Contacting element for such a pump device. According to the invention, the pump device comprises an electric drive with a stator and a rotor and a pump housing in which an impeller drivable by the rotor and the rotor are arranged. Furthermore, the pump device has a motor housing, in which the stator is arranged, control electronics, which comprises a printed circuit board, and at least one contacting element for mechanical and / or electrical contacting of the stator with the control electronics, wherein the contacting further comprises an insulation displacement section and a press-fit having. It is proposed that the contacting element in the region of

Press-in section positively connected to the motor housing, in particular formed in the motor housing is formed.

In the context of the present invention, a press-in section can be understood as the section of the contacting element which is assigned to the control electronics. The press-in section is not limited to the area pressed in in the assembled state, but according to the invention extends along the contacting element as far as the compensating section. According to the invention, the press-in section extends essentially in the axial direction. However, it is also conceivable that the press-in section additionally has a section extending in the radial direction. Furthermore, it is also conceivable that the

Einpressabschnitt has self-balancing forms.

The pump device according to the invention with the features of the independent claims has the advantage that the contacting element can be precisely aligned with its press-in in Umspritzungswerkzeug and thus a high positional accuracy of the press-fit portion of the contacting can be provided. This has an advantageous effect on the assembly and in particular the

Robustness of the connection between contacting and circuit board, which is sensitive to the tolerance situation. Furthermore, the assembly can be simplified by the fixing and positioning of the contacting element in the motor housing and, consequently, manufacturing costs can be reduced.

The form-fitting fastened in the motor housing contacting element is joined axially in the further assembly process only stator side and the circuit board side.

The measures listed in the dependent claims, advantageous refinements and improvements of the given in the independent claims characteristics.

The pump device according to the invention or an advantageous

Continuing education is characterized in that the contacting a

Compensation section, which in particular between the

Insulation displacement portion and the press-in portion is arranged and in particular has a mäaderförmige shape. Such a compensating portion can absorb forces and moments by elastic and / or plastic deformation in an advantageous manner and thus a decoupling of the press-in of the

Provide insulation displacement section. Especially in operation under high

thermal stresses can thus be absorbed and compensated for thermal expansion of the assembly in the region of the contacting and contacting itself in an advantageous manner.

In the context of the present invention, a meandering shape can be understood in particular to mean a shape which has a loop-shaped profile. According to the invention, different embodiments are conceivable. For example, it is conceivable that the meandering shape has a rectangular or sine wave-shaped form. In addition to meandering compensation sections, other profile shapes and material pairings are also conceivable for providing the compensating function. Essential to the invention here is only the compensating portion by elastic and / or plastic deformation forces and / or moments can absorb. According to an advantageous embodiment of the invention, the stator has a recess for receiving the insulation displacement section of the Kontaktierlementes.

In the context of the present invention, a recess can be understood to mean, in particular, a pocket-shaped depression which is capable of holding the pocket

Lead wire to guide and positioning and the corresponding

Include insulation displacement portion of the contacting.

According to an advantageous embodiment of the invention, the recess has an insertion bevel. Such an insertion bevel allows a simple, less tolerance-specific insertion of the insulation displacement element into the stator and concomitantly shortened production times.

In the context of the present invention, an insertion bevel can be understood in particular to be a funnel-shaped cross section of the recess. However, it is also conceivable that only one side wall is formed bevelled in the region of the opening. Essential to the invention here is merely that the cross-section increases in the direction of the receiving opening and thus an insertion of the

Schneidklemmabschnittes is simplified.

According to an advantageous embodiment of the invention, the press-in portion is electrically connected to the circuit board. Such an electrical connection can in particular by pressing the Einpressabschnittes in the circuit board

to be provided. However, it is also conceivable that the press-in portion is soldered to the circuit board. Essential to the invention here is merely that a simple joining of the press-in section in the axial direction, that is in the direction of

Rotary axis of the rotor of the pump device, is possible.

In the context of the present invention, an axis of rotation can be understood to mean an imaginary straight line extending in the infinite around which the rotor rotates during operation.

According to an advantageous embodiment of the invention, the motor housing has an opening, wherein in the region of the opening of the compensation section and / or the Insulation displacement section are arranged. Due to the arrangement of the compensation section in the region of the opening, the compensating and decoupling function of the compensation section can be provided in an advantageous manner. According to the invention, the opening is designed as a passage opening, through which the contacting element engages in the mounted state and assembly forces can be introduced directly to the shoulder.

According to an advantageous embodiment of the invention, the contacting element is integrally formed. Such a one-piece contacting element can be produced in a particularly simple and cost-effective manner, for example as a stamped and bent part.

According to an advantageous embodiment of the invention, the

Insulation displacement section on a shoulder, which rests against the motor housing and / or arranged in the region of the opening. In a voltage applied to the motor housing shoulder of the insulation displacement section of this can by force on

Motor housing are pressed into the corresponding recess. However, it is also conceivable that the shoulder is arranged in the region of the opening. Such an embodiment of the invention allows for the installation of a direct application of force to the shoulder.

Preferably, a housing cover is arranged on the motor housing. The

The housing cover and the motor housing enclose the printed circuit board between them. In this way, the control electronics is advantageously protected against damage.

drawing

Embodiments of the invention are illustrated in the figures and explained in more detail in the following description. Show it:

Figure 1 is a schematic representation of an inventive

Pump device,

Figure 2 shows an inventive contacting in a perspective

Presentation,

3 shows a detail of a pump device according to the invention with a contact element according to the invention according to FIG 2 in a perspective view.

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description

1 shows a schematic sectional view of an exemplary embodiment of a pump device 10 according to the invention. Such a pump device 10 can be used, for example, as a water pump device or auxiliary water pump device in a cooling circuit of a motor vehicle.

The pump device 10 generally has a rotor, not shown, which is designed as an impeller or impeller and is arranged in a pump pot 12 of the pump device 10. About an intake 14 of the

Pump device 10 or its pump housing 16 is sucked water or another fluid and passed through a pressure port, which is not shown in detail. The rotor forms on the one hand the magnetic part of an electric motor and on the other hand, on the hydraulic side, at the same time

Impeller or impeller off. The impeller is arranged in the illustrated embodiment in the sump 12.

The pump device 10 also has a pump part and a motor part. The pump part is in this case from the pump housing 16, the impeller, not shown, the pump pot 12 and z. B. an O-ring, which as a sealing element after acting outside, formed. The motor part of the pump device 10, as shown in Fig. 1, in turn, from a motor housing 18, with a stator 20, not shown in detail, a printed circuit board 22, a housing cover 24 and the corresponding sealing elements formed. The stator 20 may comprise, for example, a bobbin device with windings of winding wire.

The electrical part and the hydraulic part are usually connected to each other by means of a screw connection. Here, the pump housing 16 and the motor housing 18 are axially biased with a defined torque, so that leaks are excluded. In the example shown in Fig. 1 for a

Pumping device 10 is externally provided around the pump pot 12 of the stator 20, which drives the rotor or the impeller. The stator 20 is further disposed in the motor housing 18, which is separated from the sump 12, so that no water can penetrate into this area. As can also be seen in FIG. 1, the motor housing 18 has a substantially cup-shaped form with a bottom plate 26 adjoining the side wall. The motor housing 18 shown in Figure 1 is made in particular by means of injection molding of a curable medium. Axially below the motor housing 18 and the stator 20, a control electronics is arranged, which has a printed circuit board 22 and disposed thereon mechanical, electro-mechanical, electrical and / or electronic components 30.

To cover the control electronics, the pump device 10 has a

Housing cover 24, which is preferably attached to the motor housing 18 and has a substantially cup-shaped shape. Furthermore, the pump device

10 is also not shown in detail connector device 32 for connecting the pump device 10 to a power source, such as a vehicle battery. The plug device 32 is advantageously integrated in the housing cover 24 and can for example serve to receive an associated connector plug.

In operation, when the rotor or the impeller is driven about the imaginary axis of rotation 31 via the stator 20 of the electric motor, a cooling liquid, for example water, from a connected cooling circuit of an internal combustion engine or other device which provides the cooling liquid over the Inlet 14 sucked into the pump housing 16. The sucked

Coolant is then to be supplied with a cooling liquid

Device forwarded via the discharge nozzle of the pump housing 16. Such a eKe coolant to be supplied device is for example a heater and / or a cooling device, such as an air conditioner of a vehicle, etc.

The circuit board 22 is formed according to a possible embodiment of the invention is substantially circular and arranged transversely to the axis of rotation 31. However, rectangular or square embodiments of the printed circuit board 22 are also conceivable. For electrically and / or mechanically contacting the stator 20 with the control electronics, the pump device 10 according to the invention, as shown schematically in FIG. 1, has a contacting element 40. This

Contacting element 40 has a motor-side insulation displacement section 42 and a printed circuit board-side press-in section 44. This is according to the invention

Kontaktierelement 40 in the region of the press-fit portion positively connected to the motor housing 18, in particular, it is formed in the motor housing 18 injected. The following Figures 2 and 3 show the inventive

Kontaktierelement 40 and the positive engagement of the Kontaktierelementes 40 in the motor housing 18th

FIG. 2 shows a perspective detail view of a device according to the invention

Kontaktierelementes 40. As can be clearly seen in Figure 2, this has

Contacting element 40 has an insulation displacement section 42 and a press-in section 44. According to the invention, the contacting element 40 extends substantially in the longitudinal direction, that is to say it extends in the installed state substantially in the direction of the axis of rotation 31 of the rotor. According to the invention, the contacting element 40 is suitable for bridging the axial spacing, that is to say the distance in the direction of the axis of rotation 31 between the stator 18 and the connecting electronics or the printed circuit board 22.

According to one embodiment of the invention is between the

IDC section 42 and the press-in section 44, a compensation section 46 is arranged. This compensation section 46 extends substantially transversely to the Longitudinal direction of the insulation displacement section 42 and the Einpressabschnittes 44. According to the embodiment shown in Figure 2, the compensation portion 46 has a meandering shape. Such a

meandering compensating portion 46 advantageously allows the

Compensation of component, assembly and assembly tolerances by elastic and / or plastic deformation.

According to the embodiment shown in Figure 2, the meandering

Compensation section on a 270 ° loop on. In other words, the contacting element 40 has a loop-shaped profile in the region of the compensation section 46, which has an input region which is arranged transversely to an output region. In this way, forces in the radial direction, that is to say in a direction transverse to the direction of longitudinal extension, can be optimally absorbed and compensated in a small area section.

According to the invention, the contacting element 40 is positively connected to the motor housing 18 in the region of the press-in section 44. According to an embodiment of the invention, the contacting element 40 is molded onto the motor housing 18. In Figure 2, the receiving area 48 is shown hatched. In this area, the motor housing 18 forms a positive receptacle for the

Kontaktierelement 40. The contacting element 40 is thereby inserted into the injection mold and molded with the motor housing 18 forming, curable medium. By positioning the contacting elements 40 in the injection molding tool, it is possible to provide an exact alignment of the press-in section 44 and, concomitantly, a high positioning quality.

As can be seen in FIG. 2, the receiving area 48 of the

Kontaktierelementes 40 both an axial section and a radial section. Furthermore, a thickening region 50 is arranged in the region of the axial section. In this way, a solid injection of the Kontaktierelementes 40 can be provided, which can absorb radial and axial forces optimally. According to a further embodiment of the invention, the receiving area 48 additionally comprises a first meander-shaped section, which results in an advantageous enlargement of the molded-on lateral surface of the contacting element 40. As already mentioned, the contacting element 40 according to the invention electrically connects the stator 20 to the control electronics. According to one embodiment of the invention, the press-in region 44 of the contacting element 40 is pressed into the printed circuit board 22 during assembly. However, it is also conceivable that the press-in area 44 is soldered to the printed circuit board 22. Essential to the invention here is merely that an electrical and / or mechanical connection between the contacting element 40 and the printed circuit board 22 is provided.

As can be further clearly seen in FIG. 2, the insulation displacement section 42 of the contacting element 40 has a receiving slot 52 whose geometry is generally designed to be manufacturer-specific. The receiving slot 52 extends substantially in the longitudinal direction and has a width 54 which is designed such that after assembly, a prestressed connection between the

Kontaktierelement 40 and the winding wire of the stator 20 is formed. The

The insulation displacement section 42 of the contacting element 40 and the winding wire deform elastically and plastically when the insulation displacement section 42 is pressed into a recess 56 arranged on the stator 20 and adapt to one another in terms of their contour. In this way, an electrical connection between stator and contacting element 40 can be provided. Such a recess 56 according to the invention is shown in more detail in FIG. The insulation displacement technology is well known from the prior art, so here for the purpose of scarcity of

Description is omitted on a further description.

As can be seen in Figure 2, the insulation displacement section 42 has a

Balancing section 46 facing, extending in the radial direction shoulder 55. This shoulder 55 is in the mounted state on the bottom plate 26 of the

Motor housing 18 on. According to an alternative embodiment of the invention, it is also conceivable that the shoulder 55 in the region of a in the motor housing 18th

arranged opening 60 is arranged. The arrangement of the cutting clamp or the shoulder 55 is explained in more detail in FIG.

FIG. 3 is a perspective detail view of a detail of FIG

Pump device according to the invention shown in Figure 1. The section shows in particular the contacting element 40 according to the invention according to FIG. 2 as well as its integration into the motor housing 18. FIG. 2 shows the underside of the housing

Motor housing 18 and the bottom plate 26 of the motor housing 18. As can be clearly seen in Figure 2, the contacting element 40 has a motor or stator-side insulation displacement section 42 and a

PCB-side press-fit 44. Insulation displacement portion 42 and

Einpressabschnitt 44 extend substantially in the longitudinal direction, that is, in the direction of the axis of rotation 31. Between the insulation displacement section 42 and the press-in section 4 is a radially extending compensating portion 46 is arranged. This compensation section 46 according to the invention has an im

Essentially meandering shape.

As already explained, the contacting element 40 is in the region of

Einpressabschnittes 44 molded with the motor housing 18. The curable medium thus encloses receiving area 48 in a form-fitting manner. According to the embodiment of the invention shown in FIG. 3, the motor housing 18 has an opening 60. In this opening 60, the compensation portion 46 is arranged according to the invention with its meandering shape. The compensating section 46 extends according to the invention in the plane of the opening 60 and the bottom plate 26 of the motor housing 18. According to the illustrated in Figure 3

Embodiment, the opening 60 has a compensating portion 46 adapted shape. As a result of the arrangement of the compensating section 46 in the opening 60, the compensating section 46 can deform elastically and / or plastically in an advantageous manner. In this way, an advantageous decoupling of

Einpressabschnittes 44 are provided by the insulation displacement section 42.

For stator-side contact with the winding wire is on the stator 20 a

Recess 56 arranged. As can be clearly seen in FIG. 3, this recess 56 has insertion bevels 62. As already mentioned, the insulation displacement section 42 of the contacting element 40 and the winding wire deform elastically and plastically when the insulation displacement section 42 is pressed into the recess 56 and adapt to one another in terms of their contour. On This way, an electrical connection between the stator and

Contacting element 40 are provided.

In the embodiment shown in Figure 3, the shoulder 55 of the

IDC 42 arranged in the region of the opening 60. When mounting a Kontaktierlementes 40 formed in this way with its corresponding opening 60, the insulation displacement element 42, which is accessible through the opening 60, are pushed into the corresponding recess 60. However, according to an alternative embodiment, it is also conceivable that the shoulder bears against the bottom side 26 of the motor housing 18. When mounting a pump device 10 designed in this way, the introduction of force takes place when the insulation displacement section 42 is pressed into the corresponding recess 56 via the motor housing 18.

Claims

claims

1. pump device (10), in particular motor vehicle pump device for

Conveying liquids, comprising:

An electric drive with a stator (20) and a rotor,

A pump housing (16) in which an impeller drivable by the rotor and the rotor are arranged,

A motor housing, (18) in which the stator (20) is arranged

A control electronics comprising a printed circuit board (22),

At least one contact element (40) for the mechanical and / or electrical contacting of the stator (20) with the control electronics, wherein the

Contacting element (40) has an insulation displacement section (42) and a

Having press-in section (44),

characterized in that the contacting element (40) in the region of

Einpressabschnittes (44) positively connected to the motor housing (18), in particular in the motor housing (18) is formed injected.

2. Pump device (10) according to claim 1, characterized in that the

Contacting element (40) has a compensating portion (46), which

in particular between the insulation displacement section (42) and the press-in section (42) is arranged and in particular has a mäaderförmige shape.

3. Pump device (10) according to one of the preceding claims, characterized

characterized in that the stator (20) has a recess (56) for receiving the insulation displacement section (42) of the Kontaktierlementes (40).

4. pump device (10) according to any one of the preceding claims, characterized

characterized in that the recess (56) has an insertion bevel (62).

5. pump device (10) according to any one of the preceding claims, characterized in that the press-in portion (44) to the circuit board (22) is electrically connected.

6. Pump device (10) according to one of the preceding claims, characterized

characterized in that the motor housing (18) has an opening (60), wherein in the region of the opening (60) of the compensation section (46) and / or

Insulation displacement section (42) is arranged.

7. Pump device (10) according to one of the preceding claims, characterized

characterized in that the contacting element (40) is integrally formed.

8. pump device (10) according to one of the preceding claims, characterized

characterized in that the insulation displacement section (42) has a shoulder (55), wherein the shoulder (55) on the motor housing (18) rests and / or in the region of the opening (60) is arranged.

9. pump device (10) according to one of the preceding claims, characterized

in that a housing cover (24) is arranged on the motor housing (18), motor housing (18) and housing cover (24) enclosing the printed circuit board (22) between them.

10. contacting element (40) for a pump device (10) after a de

preceding claims, characterized in that the contacting element (40) has an insulation displacement portion (42), a press-in portion (44) and a, between the insulation displacement section (42) and the press-in portion (44) arranged, compensating portion (46), characterized in that the compensating section (46) has a meandering shape.